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 our $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 };
 660
 661 # iptables -p icmp -h
 662 my $icmp_type_names = {
 663     any => 1,
 664     'echo-reply' => 1,
 665     'destination-unreachable' => 1,
 666     'network-unreachable' => 1,
 667     'host-unreachable' => 1,
 668     'protocol-unreachable' => 1,
 669     'port-unreachable' => 1,
 670     'fragmentation-needed' => 1,
 671     'source-route-failed' => 1,
 672     'network-unknown' => 1,
 673     'host-unknown' => 1,
 674     'network-prohibited' => 1,
 675     'host-prohibited' => 1,
 676     'TOS-network-unreachable' => 1,
 677     'TOS-host-unreachable' => 1,
 678     'communication-prohibited' => 1,
 679     'host-precedence-violation' => 1,
 680     'precedence-cutoff' => 1,
 681     'source-quench' => 1,
 682     'redirect' => 1,
 683     'network-redirect' => 1,
 684     'host-redirect' => 1,
 685     'TOS-network-redirect' => 1,
 686     'TOS-host-redirect' => 1,
 687     'echo-request' => 1,
 688     'router-advertisement' => 1,
 689     'router-solicitation' => 1,
 690     'time-exceeded' => 1,
 691     'ttl-zero-during-transit' => 1,
 692     'ttl-zero-during-reassembly' => 1,
 693     'parameter-problem' => 1,
 694     'ip-header-bad' => 1,
 695     'required-option-missing' => 1,
 696     'timestamp-request' => 1,
 697     'timestamp-reply' => 1,
 698     'address-mask-request' => 1,
 699     'address-mask-reply' => 1,
 700 };
 701
 702 # ip6tables -p icmpv6 -h
 703
 704 my $icmpv6_type_names = {
 705     'any' => 1,
 706     'destination-unreachable' => 1,
 707     'no-route' => 1,
 708     'communication-prohibited' => 1,
 709     'address-unreachable' => 1,
 710     'port-unreachable' => 1,
 711     'packet-too-big' => 1,
 712     'time-exceeded' => 1,
 713     'ttl-zero-during-transit' => 1,
 714     'ttl-zero-during-reassembly' => 1,
 715     'parameter-problem' => 1,
 716     'bad-header' => 1,
 717     'unknown-header-type' => 1,
 718     'unknown-option' => 1,
 719     'echo-request' => 1,
 720     'echo-reply' => 1,
 721     'router-solicitation' => 1,
 722     'router-advertisement' => 1,
 723     'neighbour-solicitation' => 1,
 724     'neighbour-advertisement' => 1,
 725     'redirect' => 1,
 726 };
 727
 728 sub init_firewall_macros {
 729
 730     $pve_fw_parsed_macros = {};
 731
 732     foreach my $k (keys %$pve_fw_macros) {
 733         my $lc_name = lc($k);
 734         my $macro = $pve_fw_macros->{$k};
 735         if (!ref($macro->[0])) {
 736             $pve_fw_macro_descr->{$k} = shift @$macro;
 737         }
 738         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 739         $pve_fw_parsed_macros->{$k} = $macro;
 740     }
 741 }
 742
 743 init_firewall_macros();
 744
 745 sub get_macros {
 746     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 747 }
 748
 749 my $etc_services;
 750
 751 sub get_etc_services {
 752
 753     return $etc_services if $etc_services;
 754
 755     my $filename = "/etc/services";
 756
 757     my $fh = IO::File->new($filename, O_RDONLY);
 758     if (!$fh) {
 759         warn "unable to read '$filename' - $!\n";
 760         return {};
 761     }
 762
 763     my $services = {};
 764
 765     while (my $line = <$fh>) {
 766         chomp ($line);
 767         next if $line =~m/^#/;
 768         next if ($line =~m/^\s*$/);
 769
 770         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 771             $services->{byid}->{$2}->{name} = $1;
 772             $services->{byid}->{$2}->{port} = $2;
 773             $services->{byid}->{$2}->{$3} = 1;
 774             $services->{byname}->{$1} = $services->{byid}->{$2};
 775         }
 776     }
 777
 778     close($fh);
 779
 780     $etc_services = $services;
 781
 782
 783     return $etc_services;
 784 }
 785
 786 my $etc_protocols;
 787
 788 sub get_etc_protocols {
 789     return $etc_protocols if $etc_protocols;
 790
 791     my $filename = "/etc/protocols";
 792
 793     my $fh = IO::File->new($filename, O_RDONLY);
 794     if (!$fh) {
 795         warn "unable to read '$filename' - $!\n";
 796         return {};
 797     }
 798
 799     my $protocols = {};
 800
 801     while (my $line = <$fh>) {
 802         chomp ($line);
 803         next if $line =~m/^#/;
 804         next if ($line =~m/^\s*$/);
 805
 806         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 807             $protocols->{byid}->{$2}->{name} = $1;
 808             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 809         }
 810     }
 811
 812     close($fh);
 813
 814     # add special case for ICMP v6
 815     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 816     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 817
 818     $etc_protocols = $protocols;
 819
 820     return $etc_protocols;
 821 }
 822
 823 my $ipv4_mask_hash_localnet = {
 824     '255.255.0.0' => 16,
 825     '255.255.128.0' => 17,
 826     '255.255.192.0' => 18,
 827     '255.255.224.0' => 19,
 828     '255.255.240.0' => 20,
 829     '255.255.248.0' => 21,
 830     '255.255.252.0' => 22,
 831     '255.255.254.0' => 23,
 832     '255.255.255.0' => 24,
 833     '255.255.255.128' => 25,
 834     '255.255.255.192' => 26,
 835     '255.255.255.224' => 27,
 836     '255.255.255.240' => 28,
 837     '255.255.255.248' => 29,
 838     '255.255.255.252' => 30,
 839 };
 840
 841 my $__local_network;
 842
 843 sub local_network {
 844     my ($new_value) = @_;
 845
 846     $__local_network = $new_value if defined($new_value);
 847
 848     return $__local_network if defined($__local_network);
 849
 850     eval {
 851         my $nodename = PVE::INotify::nodename();
 852
 853         my $ip = PVE::Cluster::remote_node_ip($nodename);
 854
 855         my $testip = Net::IP->new($ip);
 856
 857         my $routes = PVE::ProcFSTools::read_proc_net_route();
 858         foreach my $entry (@$routes) {
 859             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 860             next if !defined($mask);
 861             return if $mask eq '0.0.0.0';
 862             my $cidr = "$entry->{dest}/$mask";
 863             my $testnet = Net::IP->new($cidr);
 864             if ($testnet->overlaps($testip)) {
 865                 $__local_network = $cidr;
 866                 return;
 867             }
 868         }
 869     };
 870     warn $@ if $@;
 871
 872     return $__local_network;
 873 }
 874
 875 # ipset names are limited to 31 characters,
 876 # and we use '-v4' or '-v6' to indicate IP versions,
 877 # and we use '_swap' suffix for atomic update,
 878 # for example PVEFW-${VMID}-${ipset_name}_swap
 879
 880 my $max_iptables_ipset_name_length = 31 - length("_swap") - length("-v4");
 881
 882 sub compute_ipset_chain_name {
 883     my ($vmid, $ipset_name) = @_;
 884
 885     $vmid = 0 if !defined($vmid);
 886
 887     my $id = "$vmid-${ipset_name}";
 888
 889     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 890         $id = PVE::Tools::fnv31a_hex($id);
 891     }
 892
 893     return "PVEFW-$id";
 894 }
 895
 896 sub compute_ipfilter_ipset_name {
 897     my ($iface) = @_;
 898
 899     return "ipfilter-$iface";
 900 }
 901
 902 sub parse_address_list {
 903     my ($str) = @_;
 904
 905     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 906         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 907         return;
 908     }
 909
 910     if ($str =~ m/^${ip_alias_pattern}$/) {
 911         die "alias name too long\n" if length($str) > $max_alias_name_length;
 912         return;
 913     }
 914
 915     my $count = 0;
 916     my $iprange = 0;
 917     my $ipversion;
 918
 919     foreach my $elem (split(/,/, $str)) {
 920         $count++;
 921         my $ip = Net::IP->new($elem);
 922         if (!$ip) {
 923             my $err = Net::IP::Error();
 924             die "invalid IP address: $err\n";
 925         }
 926         $iprange = 1 if $elem =~ m/-/;
 927
 928         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 929
 930         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 931             if $ipversion && ($new_ipversion != $ipversion);
 932
 933         $ipversion = $new_ipversion;
 934     }
 935
 936     die "you can't use a range in a list\n" if $iprange && $count > 1;
 937
 938     return $ipversion;
 939 }
 940
 941 sub parse_port_name_number_or_range {
 942     my ($str) = @_;
 943
 944     my $services = PVE::Firewall::get_etc_services();
 945     my $count = 0;
 946     my $icmp_port = 0;
 947
 948     foreach my $item (split(/,/, $str)) {
 949         $count++;
 950         if ($item =~ m/^(\d+):(\d+)$/) {
 951             my ($port1, $port2) = ($1, $2);
 952             die "invalid port '$port1'\n" if $port1 > 65535;
 953             die "invalid port '$port2'\n" if $port2 > 65535;
 954         } elsif ($item =~ m/^(\d+)$/) {
 955             my $port = $1;
 956             die "invalid port '$port'\n" if $port > 65535;
 957         } else {
 958             if ($icmp_type_names->{$item}) {
 959                 $icmp_port = 1;
 960             } elsif ($icmpv6_type_names->{$item}) {
 961                 $icmp_port = 1;
 962             } else {
 963                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 964             }
 965         }
 966     }
 967
 968     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 969
 970     return $count;
 971 }
 972
 973 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 974 sub pve_fw_verify_port_spec {
 975    my ($portstr) = @_;
 976
 977    parse_port_name_number_or_range($portstr);
 978
 979    return $portstr;
 980 }
 981
 982 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 983 sub pve_fw_verify_addr_spec {
 984    my ($list) = @_;
 985
 986    parse_address_list($list);
 987
 988    return $list;
 989 }
 990
 991 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 992 sub pve_fw_verify_protocol_spec {
 993    my ($proto) = @_;
 994
 995    my $protocols = get_etc_protocols();
 996
 997    die "unknown protocol '$proto'\n" if $proto &&
 998        !(defined($protocols->{byname}->{$proto}) ||
 999          defined($protocols->{byid}->{$proto}));
1000
1001    return $proto;
1002 }
1003
1004
1005 # helper function for API
1006
1007 sub copy_opject_with_digest {
1008     my ($object) = @_;
1009
1010     my $sha = Digest::SHA->new('sha1');
1011
1012     my $res = {};
1013     foreach my $k (sort keys %$object) {
1014         my $v = $object->{$k};
1015         next if !defined($v);
1016         $res->{$k} = $v;
1017         $sha->add($k, ':', $v, "\n");
1018     }
1019
1020     my $digest = $sha->hexdigest;
1021
1022     $res->{digest} = $digest;
1023
1024     return wantarray ? ($res, $digest) : $res;
1025 }
1026
1027 sub copy_list_with_digest {
1028     my ($list) = @_;
1029
1030     my $sha = Digest::SHA->new('sha1');
1031
1032     my $res = [];
1033     foreach my $entry (@$list) {
1034         my $data = {};
1035         foreach my $k (sort keys %$entry) {
1036             my $v = $entry->{$k};
1037             next if !defined($v);
1038             $data->{$k} = $v;
1039             # Note: digest ignores refs ($rule->{errors})
1040             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1041         }
1042         push @$res, $data;
1043     }
1044
1045     my $digest = $sha->hexdigest;
1046
1047     foreach my $entry (@$res) {
1048         $entry->{digest} = $digest;
1049     }
1050
1051     return wantarray ? ($res, $digest) : $res;
1052 }
1053
1054 my $rule_properties = {
1055     pos => {
1056         description => "Update rule at position <pos>.",
1057         type => 'integer',
1058         minimum => 0,
1059         optional => 1,
1060     },
1061     digest => get_standard_option('pve-config-digest'),
1062     type => {
1063         type => 'string',
1064         optional => 1,
1065         enum => ['in', 'out', 'group'],
1066     },
1067     action => {
1068         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1069         type => 'string',
1070         optional => 1,
1071         pattern => $security_group_name_pattern,
1072         maxLength => 20,
1073         minLength => 2,
1074     },
1075     macro => {
1076         type => 'string',
1077         optional => 1,
1078         maxLength => 128,
1079     },
1080     iface => get_standard_option('pve-iface', { optional => 1 }),
1081     source => {
1082         type => 'string', format => 'pve-fw-addr-spec',
1083         optional => 1,
1084     },
1085     dest => {
1086         type => 'string', format => 'pve-fw-addr-spec',
1087         optional => 1,
1088     },
1089     proto => {
1090         type => 'string', format => 'pve-fw-protocol-spec',
1091         optional => 1,
1092     },
1093     enable => {
1094         type => 'boolean',
1095         optional => 1,
1096     },
1097     sport => {
1098         type => 'string', format => 'pve-fw-port-spec',
1099         optional => 1,
1100     },
1101     dport => {
1102         type => 'string', format => 'pve-fw-port-spec',
1103         optional => 1,
1104     },
1105     comment => {
1106         type => 'string',
1107         optional => 1,
1108     },
1109 };
1110
1111 sub add_rule_properties {
1112     my ($properties) = @_;
1113
1114     foreach my $k (keys %$rule_properties) {
1115         my $h = $rule_properties->{$k};
1116         # copy data, so that we can modify later without side effects
1117         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1118     }
1119
1120     return $properties;
1121 }
1122
1123 sub delete_rule_properties {
1124     my ($rule, $delete_str) = @_;
1125
1126     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1127         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1128             if !defined($rule_properties->{$opt});
1129         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1130             if $opt eq 'type' || $opt eq 'action';
1131         delete $rule->{$opt};
1132     }
1133
1134     return $rule;
1135 }
1136
1137 my $apply_macro = sub {
1138     my ($macro_name, $param, $verify) = @_;
1139
1140     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1141     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1142
1143     my $rules = [];
1144
1145     foreach my $templ (@$macro_rules) {
1146         my $rule = {};
1147         my $param_used = {};
1148         foreach my $k (keys %$templ) {
1149             my $v = $templ->{$k};
1150             if ($v eq 'PARAM') {
1151                 $v = $param->{$k};
1152                 $param_used->{$k} = 1;
1153             } elsif ($v eq 'DEST') {
1154                 $v = $param->{dest};
1155                 $param_used->{dest} = 1;
1156             } elsif ($v eq 'SOURCE') {
1157                 $v = $param->{source};
1158                 $param_used->{source} = 1;
1159             }
1160
1161             if (!defined($v)) {
1162                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1163                 raise_param_exc({ macro => $msg }) if $verify;
1164                 die "$msg\n";
1165             }
1166             $rule->{$k} = $v;
1167         }
1168         foreach my $k (keys %$param) {
1169             next if $k eq 'macro';
1170             next if !defined($param->{$k});
1171             next if $param_used->{$k};
1172             if (defined($rule->{$k})) {
1173                 if ($rule->{$k} ne $param->{$k}) {
1174                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1175                     raise_param_exc({ $k => $msg }) if $verify;
1176                     die "$msg\n";
1177                 }
1178             } else {
1179                 $rule->{$k} = $param->{$k};
1180             }
1181         }
1182         push @$rules, $rule;
1183     }
1184
1185     return $rules;
1186 };
1187
1188 my $rule_env_iface_lookup = {
1189     'ct' => 1,
1190     'vm' => 1,
1191     'group' => 0,
1192     'cluster' => 1,
1193     'host' => 1,
1194 };
1195
1196 sub verify_rule {
1197     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1198
1199     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1200
1201     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1202     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1203
1204     my $errors = $rule->{errors} || {};
1205
1206     my $error_count = 0;
1207
1208     my $add_error = sub {
1209         my ($param, $msg)  = @_;
1210         chomp $msg;
1211         raise_param_exc({ $param => $msg }) if !$noerr;
1212         $error_count++;
1213         $errors->{$param} = $msg if !$errors->{$param};
1214     };
1215
1216     my $check_ipset_or_alias_property = sub {
1217         my ($name, $expected_ipversion) = @_;
1218
1219         if (my $value = $rule->{$name}) {
1220             if ($value =~ m/^\+/) {
1221                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1222                     &$add_error($name, "no such ipset '$1'")
1223                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1224
1225                 } else {
1226                     &$add_error($name, "invalid ipset name '$value'");
1227                 }
1228             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1229                 my $alias = lc($value);
1230                 &$add_error($name, "no such alias '$value'")
1231                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1232
1233                 my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1234                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1235
1236                 die "detected mixed ipv4/ipv6 adresses in rule\n"
1237                     if $expected_ipversion && ($expected_ipversion != $e->{ipversion});
1238             }
1239         }
1240     };
1241
1242     my $type = $rule->{type};
1243     my $action = $rule->{action};
1244
1245     &$add_error('type', "missing property") if !$type;
1246     &$add_error('action', "missing property") if !$action;
1247
1248     if ($type) {
1249         if ($type eq  'in' || $type eq 'out') {
1250             &$add_error('action', "unknown action '$action'")
1251                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1252         } elsif ($type eq 'group') {
1253             &$add_error('type', "security groups not allowed")
1254                 if !$allow_groups;
1255             &$add_error('action', "invalid characters in security group name")
1256                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1257         } else {
1258             &$add_error('type', "unknown rule type '$type'");
1259         }
1260     }
1261
1262     if ($rule->{iface}) {
1263         &$add_error('type', "parameter -i not allowed for this rule type")
1264             if !$allow_iface;
1265         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1266         &$add_error('iface', $@) if $@;
1267         if ($rule_env eq 'vm') {
1268             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1269                 if $rule->{iface} !~  m/^net(\d+)$/;
1270         } elsif ($rule_env eq 'ct') {
1271             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1272                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1273         }
1274     }
1275
1276     if ($rule->{macro}) {
1277         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1278             $rule->{macro} = $preferred_name;
1279         } else {
1280             &$add_error('macro', "unknown macro '$rule->{macro}'");
1281         }
1282     }
1283
1284     my $ipversion;
1285     my $set_ip_version = sub {
1286         my $vers = shift;
1287         if ($vers) {
1288             die "detected mixed ipv4/ipv6 adresses in rule\n"
1289                 if $ipversion && ($vers != $ipversion);
1290             $ipversion = $vers;
1291         }
1292     };
1293
1294     if ($rule->{proto}) {
1295         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1296         &$add_error('proto', $@) if $@;
1297         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1298         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1299     }
1300
1301     if ($rule->{dport}) {
1302         eval { parse_port_name_number_or_range($rule->{dport}); };
1303         &$add_error('dport', $@) if $@;
1304         &$add_error('proto', "missing property - 'dport' requires this property")
1305             if !$rule->{proto};
1306     }
1307
1308     if ($rule->{sport}) {
1309         eval { parse_port_name_number_or_range($rule->{sport}); };
1310         &$add_error('sport', $@) if $@;
1311         &$add_error('proto', "missing property - 'sport' requires this property")
1312             if !$rule->{proto};
1313     }
1314
1315     if ($rule->{source}) {
1316         eval {
1317             my $source_ipversion = parse_address_list($rule->{source});
1318             &$set_ip_version($source_ipversion);
1319         };
1320         &$add_error('source', $@) if $@;
1321         &$check_ipset_or_alias_property('source', $ipversion);
1322     }
1323
1324     if ($rule->{dest}) {
1325         eval {
1326             my $dest_ipversion = parse_address_list($rule->{dest});
1327             &$set_ip_version($dest_ipversion);
1328         };
1329         &$add_error('dest', $@) if $@;
1330         &$check_ipset_or_alias_property('dest', $ipversion);
1331     }
1332
1333     if ($rule->{macro} && !$error_count) {
1334         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1335         if (my $err = $@) {
1336             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1337                 my $eh = $err->{errors};
1338                 foreach my $p (keys %$eh) {
1339                     &$add_error($p, $eh->{$p});
1340                 }
1341             } else {
1342                 &$add_error('macro', "$err");
1343             }
1344         }
1345     }
1346
1347     $rule->{errors} = $errors if $error_count;
1348     $rule->{ipversion} = $ipversion if $ipversion;
1349
1350     return $rule;
1351 }
1352
1353 sub copy_rule_data {
1354     my ($rule, $param) = @_;
1355
1356     foreach my $k (keys %$rule_properties) {
1357         if (defined(my $v = $param->{$k})) {
1358             if ($v eq '' || $v eq '-') {
1359                 delete $rule->{$k};
1360             } else {
1361                 $rule->{$k} = $v;
1362             }
1363         }
1364     }
1365
1366     return $rule;
1367 }
1368
1369 sub rules_modify_permissions {
1370     my ($rule_env) = @_;
1371
1372     if ($rule_env eq 'host') {
1373         return {
1374             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1375         };
1376     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1377         return {
1378             check => ['perm', '/', [ 'Sys.Modify' ]],
1379         };
1380     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1381         return {
1382             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1383         }
1384     }
1385
1386     return undef;
1387 }
1388
1389 sub rules_audit_permissions {
1390     my ($rule_env) = @_;
1391
1392     if ($rule_env eq 'host') {
1393         return {
1394             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1395         };
1396     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1397         return {
1398             check => ['perm', '/', [ 'Sys.Audit' ]],
1399         };
1400     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1401         return {
1402             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1403         }
1404     }
1405
1406     return undef;
1407 }
1408
1409 # core functions
1410 my $bridge_firewall_enabled = 0;
1411
1412 sub enable_bridge_firewall {
1413
1414     return if $bridge_firewall_enabled; # only once
1415
1416     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1417     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1418
1419     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1420     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1421
1422     $bridge_firewall_enabled = 1;
1423 }
1424
1425 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1426
1427 sub iptables_restore_cmdlist {
1428     my ($cmdlist) = @_;
1429
1430     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1431 }
1432
1433 sub ip6tables_restore_cmdlist {
1434     my ($cmdlist) = @_;
1435
1436     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1437 }
1438
1439 sub ipset_restore_cmdlist {
1440     my ($cmdlist) = @_;
1441
1442     run_command("/usr/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1443 }
1444
1445 sub iptables_get_chains {
1446     my ($iptablescmd) = @_;
1447
1448     $iptablescmd = "iptables" if !$iptablescmd;
1449
1450     my $res = {};
1451
1452     # check what chains we want to track
1453     my $is_pvefw_chain = sub {
1454         my $name = shift;
1455
1456         return 1 if $name =~ m/^PVEFW-\S+$/;
1457
1458         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1459
1460         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1461
1462         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1463
1464         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1465         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1466
1467         return undef;
1468     };
1469
1470     my $table = '';
1471
1472     my $hooks = {};
1473
1474     my $parser = sub {
1475         my $line = shift;
1476
1477         return if $line =~ m/^#/;
1478         return if $line =~ m/^\s*$/;
1479
1480         if ($line =~ m/^\*(\S+)$/) {
1481             $table = $1;
1482             return;
1483         }
1484
1485         return if $table ne 'filter';
1486
1487         if ($line =~ m/^:(\S+)\s/) {
1488             my $chain = $1;
1489             return if !&$is_pvefw_chain($chain);
1490             $res->{$chain} = "unknown";
1491         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1492             my ($chain, $sig) = ($1, $2);
1493             return if !&$is_pvefw_chain($chain);
1494             $res->{$chain} = $sig;
1495         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1496             $hooks->{$1} = 1;
1497         } else {
1498             # simply ignore the rest
1499             return;
1500         }
1501     };
1502
1503     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1504
1505     return wantarray ? ($res, $hooks) : $res;
1506 }
1507
1508 sub iptables_chain_digest {
1509     my ($rules) = @_;
1510     my $digest = Digest::SHA->new('sha1');
1511     foreach my $rule (@$rules) { # order is important
1512         $digest->add($rule);
1513     }
1514     return $digest->b64digest;
1515 }
1516
1517 sub ipset_chain_digest {
1518     my ($rules) = @_;
1519
1520     my $digest = Digest::SHA->new('sha1');
1521     foreach my $rule (sort @$rules) { # note: sorted
1522         $digest->add($rule);
1523     }
1524     return $digest->b64digest;
1525 }
1526
1527 sub ipset_get_chains {
1528
1529     my $res = {};
1530     my $chains = {};
1531
1532     my $parser = sub {
1533         my $line = shift;
1534
1535         return if $line =~ m/^#/;
1536         return if $line =~ m/^\s*$/;
1537         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1538             my $chain = $1;
1539             $line =~ s/\s+$//; # delete trailing white space
1540             push @{$chains->{$chain}}, $line;
1541         } else {
1542             # simply ignore the rest
1543             return;
1544         }
1545     };
1546
1547     run_command("/usr/sbin/ipset save", outfunc => $parser);
1548
1549     # compute digest for each chain
1550     foreach my $chain (keys %$chains) {
1551         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1552     }
1553
1554     return $res;
1555 }
1556
1557 sub ruleset_generate_cmdstr {
1558     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1559
1560     return if defined($rule->{enable}) && !$rule->{enable};
1561     return if $rule->{errors};
1562
1563     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1564
1565     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1566     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1567
1568     my @cmd = ();
1569
1570     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1571     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1572
1573     my $source = $rule->{source};
1574     my $dest = $rule->{dest};
1575
1576     if ($source) {
1577         if ($source =~ m/^\+/) {
1578             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1579                 my $name = $1;
1580                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1581                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1582                     push @cmd, "-m set --match-set ${ipset_chain} src";
1583                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1584                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1585                     push @cmd, "-m set --match-set ${ipset_chain} src";
1586                 } else {
1587                     die "no such ipset '$name'\n";
1588                 }
1589             } else {
1590                 die "invalid security group name '$source'\n";
1591             }
1592         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1593             my $alias = lc($source);
1594             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1595             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1596             die "no such alias '$source'\n" if !$e;
1597             push @cmd, "-s $e->{cidr}";
1598         } elsif ($source =~ m/\-/){
1599             push @cmd, "-m iprange --src-range $source";
1600         } else {
1601             push @cmd, "-s $source";
1602         }
1603     }
1604
1605     if ($dest) {
1606         if ($dest =~ m/^\+/) {
1607             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1608                 my $name = $1;
1609                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1610                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1611                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1612                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1613                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1614                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1615                 } else {
1616                     die "no such ipset '$name'\n";
1617                 }
1618             } else {
1619                 die "invalid security group name '$dest'\n";
1620             }
1621         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1622             my $alias = lc($dest);
1623             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1624             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1625             die "no such alias '$dest'\n" if !$e;
1626             push @cmd, "-d $e->{cidr}";
1627         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1628             push @cmd, "-m iprange --dst-range $dest";
1629         } else {
1630             push @cmd, "-d $dest";
1631         }
1632     }
1633
1634     if ($rule->{proto}) {
1635         push @cmd, "-p $rule->{proto}";
1636
1637         my $multiport = 0;
1638         $multiport++ if $nbdport > 1;
1639         $multiport++ if $nbsport > 1;
1640
1641         push @cmd, "--match multiport" if $multiport;
1642
1643         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1644             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1645
1646         if ($rule->{dport}) {
1647             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1648                 # Note: we use dport to store --icmp-type
1649                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1650                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1651             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1652                 # Note: we use dport to store --icmpv6-type
1653                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1654                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1655             } else {
1656                 if ($nbdport > 1) {
1657                     if ($multiport == 2) {
1658                         push @cmd,  "--ports $rule->{dport}";
1659                     } else {
1660                         push @cmd, "--dports $rule->{dport}";
1661                     }
1662                 } else {
1663                     push @cmd, "--dport $rule->{dport}";
1664                 }
1665             }
1666         }
1667
1668         if ($rule->{sport}) {
1669             if ($nbsport > 1) {
1670                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1671             } else {
1672                 push @cmd, "--sport $rule->{sport}";
1673             }
1674         }
1675     } elsif ($rule->{dport} || $rule->{sport}) {
1676         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1677         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1678     }
1679
1680     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1681
1682     if (my $action = $rule->{action}) {
1683         $action = $actions->{$action} if defined($actions->{$action});
1684         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1685         push @cmd, $goto ? "-g $action" : "-j $action";
1686     }
1687
1688     return scalar(@cmd) ? join(' ', @cmd) : undef;
1689 }
1690
1691 sub ruleset_generate_rule {
1692     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1693
1694     my $rules;
1695
1696     if ($rule->{macro}) {
1697         $rules = &$apply_macro($rule->{macro}, $rule);
1698     } else {
1699         $rules = [ $rule ];
1700     }
1701
1702     # update all or nothing
1703
1704     my @cmds = ();
1705     foreach my $tmp (@$rules) {
1706         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1707             push @cmds, $cmdstr;
1708         }
1709     }
1710
1711     foreach my $cmdstr (@cmds) {
1712         ruleset_addrule($ruleset, $chain, $cmdstr);
1713     }
1714 }
1715
1716 sub ruleset_generate_rule_insert {
1717     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1718
1719     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1720
1721     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1722         ruleset_insertrule($ruleset, $chain, $cmdstr);
1723     }
1724 }
1725
1726 sub ruleset_create_chain {
1727     my ($ruleset, $chain) = @_;
1728
1729     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1730     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1731
1732     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1733
1734     $ruleset->{$chain} = [];
1735 }
1736
1737 sub ruleset_chain_exist {
1738     my ($ruleset, $chain) = @_;
1739
1740     return $ruleset->{$chain} ? 1 : undef;
1741 }
1742
1743 sub ruleset_addrule {
1744    my ($ruleset, $chain, $rule) = @_;
1745
1746    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1747
1748    push @{$ruleset->{$chain}}, "-A $chain $rule";
1749 }
1750
1751 sub ruleset_insertrule {
1752    my ($ruleset, $chain, $rule) = @_;
1753
1754    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1755
1756    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1757 }
1758
1759 sub get_log_rule_base {
1760     my ($chain, $vmid, $msg, $loglevel) = @_;
1761
1762     die "internal error - no log level" if !defined($loglevel);
1763
1764     $vmid = 0 if !defined($vmid);
1765
1766     # Note: we use special format for prefix to pass further
1767     # info to log daemon (VMID, LOGVELEL and CHAIN)
1768
1769     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1770 }
1771
1772 sub ruleset_addlog {
1773     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1774
1775     return if !defined($loglevel);
1776
1777     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1778
1779     $logrule = "$rule $logrule" if defined($rule);
1780
1781     ruleset_addrule($ruleset, $chain, $logrule);
1782 }
1783
1784 sub ruleset_add_chain_policy {
1785     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1786
1787     if ($policy eq 'ACCEPT') {
1788
1789         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1790                               { ACCEPT =>  $accept_action});
1791
1792     } elsif ($policy eq 'DROP') {
1793
1794         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1795
1796         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1797
1798         ruleset_addrule($ruleset, $chain, "-j DROP");
1799     } elsif ($policy eq 'REJECT') {
1800         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1801
1802         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1803
1804         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1805     } else {
1806         # should not happen
1807         die "internal error: unknown policy '$policy'";
1808     }
1809 }
1810
1811 sub ruleset_chain_add_conn_filters {
1812     my ($ruleset, $chain, $accept) = @_;
1813
1814     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1815     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1816 }
1817
1818 sub ruleset_chain_add_input_filters {
1819     my ($ruleset, $chain, $options, $cluster_conf, $ipversion, $loglevel) = @_;
1820
1821     if ($cluster_conf->{ipset}->{blacklist}){
1822         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1823             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1824             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1825             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1826         }
1827         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1828         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1829     }
1830
1831     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1832         if ($ipversion == 4) {
1833             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1834         }
1835     }
1836
1837     if ($options->{tcpflags}) {
1838         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1839     }
1840 }
1841
1842 sub ruleset_create_vm_chain {
1843     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1844
1845     ruleset_create_chain($ruleset, $chain);
1846     my $accept = generate_nfqueue($options);
1847
1848     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1849         if ($direction eq 'OUT') {
1850             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1851                                                       proto => 'udp', sport => 68, dport => 67 });
1852         } else {
1853             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1854                                                       proto => 'udp', sport => 67, dport => 68 });
1855         }
1856     }
1857
1858     if ($direction eq 'OUT') {
1859         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1860             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1861         }
1862         if ($ipfilter_ipset) {
1863             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1864         }
1865         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1866     }
1867 }
1868
1869 sub ruleset_add_group_rule {
1870     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1871
1872     my $group = $rule->{action};
1873     my $group_chain = "GROUP-$group-$direction";
1874     if(!ruleset_chain_exist($ruleset, $group_chain)){
1875         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1876     }
1877
1878     if ($direction eq 'OUT' && $rule->{iface_out}) {
1879         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1880     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1881         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1882     } else {
1883         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1884     }
1885
1886     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1887 }
1888
1889 sub ruleset_generate_vm_rules {
1890     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1891
1892     my $lc_direction = lc($direction);
1893
1894     my $in_accept = generate_nfqueue($options);
1895
1896     foreach my $rule (@$rules) {
1897         next if $rule->{iface} && $rule->{iface} ne $netid;
1898         next if !$rule->{enable} || $rule->{errors};
1899         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1900
1901         if ($rule->{type} eq 'group') {
1902             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1903                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1904         } else {
1905             next if $rule->{type} ne $lc_direction;
1906             eval {
1907                 if ($direction eq 'OUT') {
1908                     ruleset_generate_rule($ruleset, $chain, $rule,
1909                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1910                                           undef, $cluster_conf, $vmfw_conf);
1911                 } else {
1912                     ruleset_generate_rule($ruleset, $chain, $rule,
1913                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1914                                           undef, $cluster_conf, $vmfw_conf);
1915                 }
1916             };
1917             warn $@ if $@;
1918         }
1919     }
1920 }
1921
1922 sub generate_nfqueue {
1923     my ($options) = @_;
1924
1925     if ($options->{ips}) {
1926         my $action = "NFQUEUE";
1927         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1928             if (defined($3) && defined($1)) {
1929                 $action .= " --queue-balance $1:$3";
1930             } elsif (defined($1)) {
1931                 $action .= " --queue-num $1";
1932             }
1933         }
1934         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1935         return $action;
1936     } else {
1937         return "ACCEPT";
1938     }
1939 }
1940
1941 sub ruleset_generate_vm_ipsrules {
1942     my ($ruleset, $options, $direction, $iface) = @_;
1943
1944     if ($options->{ips} && $direction eq 'IN') {
1945         my $nfqueue = generate_nfqueue($options);
1946
1947         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1948             ruleset_create_chain($ruleset, "PVEFW-IPS");
1949         }
1950
1951         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1952     }
1953 }
1954
1955 sub generate_venet_rules_direction {
1956     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
1957
1958     my $lc_direction = lc($direction);
1959
1960     my $rules = $vmfw_conf->{rules};
1961
1962     my $options = $vmfw_conf->{options};
1963     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1964
1965     my $chain = "venet0-$vmid-$direction";
1966
1967     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1968
1969     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
1970
1971     # implement policy
1972     my $policy;
1973
1974     if ($direction eq 'OUT') {
1975         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1976     } else {
1977         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1978     }
1979
1980     my $accept = generate_nfqueue($options);
1981     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1982     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1983
1984     if ($direction eq 'OUT') {
1985         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1986             action => $chain,
1987             source => $ip,
1988             iface_in => 'venet0'});
1989     } else {
1990         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1991             action => $chain,
1992             dest => $ip,
1993             iface_out => 'venet0'});
1994     }
1995 }
1996
1997 sub generate_tap_rules_direction {
1998     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
1999
2000     my $lc_direction = lc($direction);
2001
2002     my $rules = $vmfw_conf->{rules};
2003
2004     my $options = $vmfw_conf->{options};
2005     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2006
2007     my $tapchain = "$iface-$direction";
2008
2009     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2010     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
2011         if $vmfw_conf->{ipset}->{$ipfilter_name};
2012
2013     # create chain with mac and ip filter
2014     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
2015
2016     if ($options->{enable}) {
2017         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2018
2019         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2020
2021         # implement policy
2022         my $policy;
2023
2024         if ($direction eq 'OUT') {
2025             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2026         } else {
2027         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2028         }
2029
2030         my $accept = generate_nfqueue($options);
2031         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2032         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
2033     } else {
2034         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2035         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
2036     }
2037
2038     # plug the tap chain to bridge chain
2039     if ($direction eq 'IN') {
2040         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2041                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2042     } else {
2043         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2044                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2045     }
2046 }
2047
2048 sub enable_host_firewall {
2049     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2050
2051     my $options = $hostfw_conf->{options};
2052     my $cluster_options = $cluster_conf->{options};
2053     my $rules = $hostfw_conf->{rules};
2054     my $cluster_rules = $cluster_conf->{rules};
2055
2056     # host inbound firewall
2057     my $chain = "PVEFW-HOST-IN";
2058     ruleset_create_chain($ruleset, $chain);
2059
2060     my $loglevel = get_option_log_level($options, "log_level_in");
2061
2062     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2063
2064     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2065     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $ipversion, $loglevel);
2066
2067     # we use RETURN because we need to check also tap rules
2068     my $accept_action = 'RETURN';
2069
2070     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2071
2072     # add host rules first, so that cluster wide rules can be overwritten
2073     foreach my $rule (@$rules, @$cluster_rules) {
2074         next if !$rule->{enable} || $rule->{errors};
2075
2076         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2077
2078         eval {
2079             if ($rule->{type} eq 'group') {
2080                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2081             } elsif ($rule->{type} eq 'in') {
2082                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2083                                       undef, $cluster_conf, $hostfw_conf);
2084             }
2085         };
2086         warn $@ if $@;
2087         delete $rule->{iface_in};
2088     }
2089
2090     # allow standard traffic for management ipset (includes cluster network)
2091     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
2092     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2093     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2094     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2095     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2096     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2097
2098     my $localnet = local_network();
2099
2100     # corosync
2101     if ($localnet) {
2102         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2103         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2104         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2105     }
2106
2107     # implement input policy
2108     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2109     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2110
2111     # host outbound firewall
2112     $chain = "PVEFW-HOST-OUT";
2113     ruleset_create_chain($ruleset, $chain);
2114
2115     $loglevel = get_option_log_level($options, "log_level_out");
2116
2117     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2118
2119     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2120
2121     # we use RETURN because we may want to check other thigs later
2122     $accept_action = 'RETURN';
2123
2124     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2125
2126     # add host rules first, so that cluster wide rules can be overwritten
2127     foreach my $rule (@$rules, @$cluster_rules) {
2128         next if !$rule->{enable} || $rule->{errors};
2129
2130         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2131         eval {
2132             if ($rule->{type} eq 'group') {
2133                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2134             } elsif ($rule->{type} eq 'out') {
2135                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2136                                       undef, $cluster_conf, $hostfw_conf);
2137             }
2138         };
2139         warn $@ if $@;
2140         delete $rule->{iface_out};
2141     }
2142
2143     # allow standard traffic on cluster network
2144     if ($localnet) {
2145         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2146         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2147         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2148         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2149
2150         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2151         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2152         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2153     }
2154
2155     # implement output policy
2156     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2157     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2158
2159     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2160     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2161 }
2162
2163 sub generate_group_rules {
2164     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2165
2166     my $rules = $cluster_conf->{groups}->{$group};
2167
2168     if (!$rules) {
2169         warn "no such security group '$group'\n";
2170         $rules = []; # create empty chain
2171     }
2172
2173     my $chain = "GROUP-${group}-IN";
2174
2175     ruleset_create_chain($ruleset, $chain);
2176     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2177
2178     foreach my $rule (@$rules) {
2179         next if $rule->{type} ne 'in';
2180         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2181         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2182     }
2183
2184     $chain = "GROUP-${group}-OUT";
2185
2186     ruleset_create_chain($ruleset, $chain);
2187     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2188
2189     foreach my $rule (@$rules) {
2190         next if $rule->{type} ne 'out';
2191         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2192         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2193         # check also other tap rules later
2194         ruleset_generate_rule($ruleset, $chain, $rule,
2195                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2196     }
2197 }
2198
2199 my $MAX_NETS = 32;
2200 my $valid_netdev_names = {};
2201 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2202     $valid_netdev_names->{"net$i"} = 1;
2203 }
2204
2205 sub parse_fw_rule {
2206     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2207
2208     my $orig_line = $line;
2209
2210     my $rule = {};
2211
2212     # we can add single line comments to the end of the rule
2213     if ($line =~ s/#\s*(.*?)\s*$//) {
2214         $rule->{comment} = decode('utf8', $1);
2215     }
2216
2217     # we can disable a rule when prefixed with '|'
2218
2219     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2220
2221     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2222         die "unable to parse rule: $line\n";
2223
2224     $rule->{type} = lc($1);
2225     $rule->{action} = $2;
2226
2227     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2228         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2229             $rule->{macro} = $1;
2230             $rule->{action} = $2;
2231         }
2232     }
2233
2234     while (length($line)) {
2235         if ($line =~ s/^-i (\S+)\s*//) {
2236             $rule->{iface} = $1;
2237             next;
2238         }
2239
2240         last if $rule->{type} eq 'group';
2241
2242         if ($line =~ s/^-p (\S+)\s*//) {
2243             $rule->{proto} = $1;
2244             next;
2245         }
2246
2247         if ($line =~ s/^-dport (\S+)\s*//) {
2248             $rule->{dport} = $1;
2249             next;
2250         }
2251
2252         if ($line =~ s/^-sport (\S+)\s*//) {
2253             $rule->{sport} = $1;
2254             next;
2255         }
2256         if ($line =~ s/^-source (\S+)\s*//) {
2257             $rule->{source} = $1;
2258             next;
2259         }
2260         if ($line =~ s/^-dest (\S+)\s*//) {
2261             $rule->{dest} = $1;
2262             next;
2263         }
2264
2265         last;
2266     }
2267
2268     die "unable to parse rule parameters: $line\n" if length($line);
2269
2270     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2271     if ($verbose && $rule->{errors}) {
2272         warn "$prefix - errors in rule parameters: $orig_line\n";
2273         foreach my $p (keys %{$rule->{errors}}) {
2274             warn "  $p: $rule->{errors}->{$p}\n";
2275         }
2276     }
2277
2278     return $rule;
2279 }
2280
2281 sub parse_vmfw_option {
2282     my ($line) = @_;
2283
2284     my ($opt, $value);
2285
2286     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2287
2288     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2289         $opt = lc($1);
2290         $value = int($2);
2291     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2292         $opt = lc($1);
2293         $value = $2 ? lc($3) : '';
2294     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2295         $opt = lc($1);
2296         $value = uc($3);
2297     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2298         $opt = lc($1);
2299         $value = $2;
2300     } else {
2301         die "can't parse option '$line'\n"
2302     }
2303
2304     return ($opt, $value);
2305 }
2306
2307 sub parse_hostfw_option {
2308     my ($line) = @_;
2309
2310     my ($opt, $value);
2311
2312     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2313
2314     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2315         $opt = lc($1);
2316         $value = int($2);
2317     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2318         $opt = lc($1);
2319         $value = $2 ? lc($3) : '';
2320     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2321         $opt = lc($1);
2322         $value = int($2);
2323     } else {
2324         die "can't parse option '$line'\n"
2325     }
2326
2327     return ($opt, $value);
2328 }
2329
2330 sub parse_clusterfw_option {
2331     my ($line) = @_;
2332
2333     my ($opt, $value);
2334
2335     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2336         $opt = lc($1);
2337         $value = int($2);
2338     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2339         $opt = lc($1);
2340         $value = uc($3);
2341     } else {
2342         die "can't parse option '$line'\n"
2343     }
2344
2345     return ($opt, $value);
2346 }
2347
2348 sub resolve_alias {
2349     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2350
2351     my $alias = lc($cidr);
2352     my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2353     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2354
2355     die "no such alias '$cidr'\n" if !$e;;
2356
2357     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2358 }
2359
2360 sub parse_ip_or_cidr {
2361     my ($cidr) = @_;
2362
2363     my $ipversion;
2364
2365     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2366         $cidr =~ s|/128$||;
2367         $ipversion = 6;
2368     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2369         $cidr =~ s|/32$||;
2370         $ipversion = 4;
2371     } else {
2372         die "value does not look like a valid IP address or CIDR network\n";
2373     }
2374
2375     return wantarray ? ($cidr, $ipversion) : $cidr;
2376 }
2377
2378 sub parse_alias {
2379     my ($line) = @_;
2380
2381     # we can add single line comments to the end of the line
2382     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2383
2384     if ($line =~ m/^(\S+)\s(\S+)$/) {
2385         my ($name, $cidr) = ($1, $2);
2386         my $ipversion;
2387
2388         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2389
2390         my $data = {
2391             name => $name,
2392             cidr => $cidr,
2393             ipversion => $ipversion,
2394         };
2395         $data->{comment} = $comment  if $comment;
2396         return $data;
2397     }
2398
2399     return undef;
2400 }
2401
2402 sub generic_fw_config_parser {
2403     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2404
2405     my $section;
2406     my $group;
2407
2408     my $res = $empty_conf;
2409
2410     while (defined(my $line = <$fh>)) {
2411         next if $line =~ m/^#/;
2412         next if $line =~ m/^\s*$/;
2413
2414         chomp $line;
2415
2416         my $linenr = $fh->input_line_number();
2417         my $prefix = "$filename (line $linenr)";
2418
2419         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2420             $section = 'options';
2421             next;
2422         }
2423
2424         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2425             $section = 'aliases';
2426             next;
2427         }
2428
2429         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2430             $section = 'groups';
2431             $group = lc($1);
2432             my $comment = $2;
2433             eval {
2434                 die "security group name too long\n" if length($group) > $max_group_name_length;
2435                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2436             };
2437             if (my $err = $@) {
2438                 ($section, $group, $comment) = undef;
2439                 warn "$prefix: $err";
2440                 next;
2441             }
2442
2443             $res->{$section}->{$group} = [];
2444             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2445                 if $comment;
2446             next;
2447         }
2448
2449         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2450             $section = 'rules';
2451             next;
2452         }
2453
2454         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2455             $section = 'ipset';
2456             $group = lc($1);
2457             my $comment = $2;
2458             eval {
2459                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2460                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2461             };
2462             if (my $err = $@) {
2463                 ($section, $group, $comment) = undef;
2464                 warn "$prefix: $err";
2465                 next;
2466             }
2467
2468             $res->{$section}->{$group} = [];
2469             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2470                 if $comment;
2471             next;
2472         }
2473
2474         if (!$section) {
2475             warn "$prefix: skip line - no section\n";
2476             next;
2477         }
2478
2479         if ($section eq 'options') {
2480             eval {
2481                 my ($opt, $value);
2482                 if ($rule_env eq 'cluster') {
2483                     ($opt, $value) = parse_clusterfw_option($line);
2484                 } elsif ($rule_env eq 'host') {
2485                     ($opt, $value) = parse_hostfw_option($line);
2486                 } else {
2487                     ($opt, $value) = parse_vmfw_option($line);
2488                 }
2489                 $res->{options}->{$opt} = $value;
2490             };
2491             warn "$prefix: $@" if $@;
2492         } elsif ($section eq 'aliases') {
2493             eval {
2494                 my $data = parse_alias($line);
2495                 $res->{aliases}->{lc($data->{name})} = $data;
2496             };
2497             warn "$prefix: $@" if $@;
2498         } elsif ($section eq 'rules') {
2499             my $rule;
2500             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2501             if (my $err = $@) {
2502                 warn "$prefix: $err";
2503                 next;
2504             }
2505             push @{$res->{$section}}, $rule;
2506         } elsif ($section eq 'groups') {
2507             my $rule;
2508             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2509             if (my $err = $@) {
2510                 warn "$prefix: $err";
2511                 next;
2512             }
2513             push @{$res->{$section}->{$group}}, $rule;
2514         } elsif ($section eq 'ipset') {
2515             # we can add single line comments to the end of the rule
2516             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2517
2518             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2519             my $nomatch = $1;
2520             my $cidr = $2;
2521             my $errors;
2522
2523             if ($nomatch && !$feature_ipset_nomatch) {
2524                 $errors->{nomatch} = "nomatch not supported by kernel";
2525             }
2526
2527             eval {
2528                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2529                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2530                 } else {
2531                     $cidr = parse_ip_or_cidr($cidr);
2532                 }
2533             };
2534             if (my $err = $@) {
2535                 chomp $err;
2536                 $errors->{cidr} = $err;
2537             }
2538
2539             my $entry = { cidr => $cidr };
2540             $entry->{nomatch} = 1 if $nomatch;
2541             $entry->{comment} = $comment if $comment;
2542             $entry->{errors} =  $errors if $errors;
2543
2544             if ($verbose && $errors) {
2545                 warn "$prefix - errors in ipset '$group': $line\n";
2546                 foreach my $p (keys %{$errors}) {
2547                     warn "  $p: $errors->{$p}\n";
2548                 }
2549             }
2550
2551             push @{$res->{$section}->{$group}}, $entry;
2552         } else {
2553             warn "$prefix: skip line - unknown section\n";
2554             next;
2555         }
2556     }
2557
2558     return $res;
2559 }
2560
2561 sub parse_hostfw_config {
2562     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2563
2564     my $empty_conf = { rules => [], options => {}};
2565
2566     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2567 }
2568
2569 sub parse_vmfw_config {
2570     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2571
2572     my $empty_conf = {
2573         rules => [],
2574         options => {},
2575         aliases => {},
2576         ipset => {} ,
2577         ipset_comments => {},
2578     };
2579
2580     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2581 }
2582
2583 sub parse_clusterfw_config {
2584     my ($filename, $fh, $verbose) = @_;
2585
2586     my $section;
2587     my $group;
2588
2589     my $empty_conf = {
2590         rules => [],
2591         options => {},
2592         aliases => {},
2593         groups => {},
2594         group_comments => {},
2595         ipset => {} ,
2596         ipset_comments => {},
2597     };
2598
2599     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2600 }
2601
2602 sub run_locked {
2603     my ($code, @param) = @_;
2604
2605     my $timeout = 10;
2606
2607     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2608
2609     die $@ if $@;
2610
2611     return $res;
2612 }
2613
2614 sub read_local_vm_config {
2615
2616     my $openvz = {};
2617     my $qemu = {};
2618
2619     my $vmdata = { openvz => $openvz, qemu => $qemu };
2620
2621     my $vmlist = PVE::Cluster::get_vmlist();
2622     return $vmdata if !$vmlist || !$vmlist->{ids};
2623     my $ids = $vmlist->{ids};
2624
2625     foreach my $vmid (keys %$ids) {
2626         next if !$vmid; # skip VE0
2627         my $d = $ids->{$vmid};
2628         next if !$d->{node} || $d->{node} ne $nodename;
2629         next if !$d->{type};
2630         if ($d->{type} eq 'openvz') {
2631             if ($have_pve_manager) {
2632                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2633                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2634                     $openvz->{$vmid} = $conf;
2635                 }
2636             }
2637         } elsif ($d->{type} eq 'qemu') {
2638             if ($have_qemu_server) {
2639                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2640                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2641                     $qemu->{$vmid} = $conf;
2642                 }
2643             }
2644         }
2645     }
2646
2647     return $vmdata;
2648 };
2649
2650 sub load_vmfw_conf {
2651     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2652
2653     my $vmfw_conf = {};
2654
2655     $dir = $pvefw_conf_dir if !defined($dir);
2656
2657     my $filename = "$dir/$vmid.fw";
2658     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2659         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2660         $vmfw_conf->{vmid} = $vmid;
2661     }
2662
2663     return $vmfw_conf;
2664 }
2665
2666 my $format_rules = sub {
2667     my ($rules, $allow_iface) = @_;
2668
2669     my $raw = '';
2670
2671     foreach my $rule (@$rules) {
2672         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2673             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2674             $raw .= uc($rule->{type});
2675             if ($rule->{macro}) {
2676                 $raw .= " $rule->{macro}($rule->{action})";
2677             } else {
2678                 $raw .= " " . $rule->{action};
2679             }
2680             if ($allow_iface && $rule->{iface}) {
2681                 $raw .= " -i $rule->{iface}";
2682             }
2683
2684             if ($rule->{type} ne  'group')  {
2685                 $raw .= " -source $rule->{source}" if $rule->{source};
2686                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2687                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2688                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2689                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2690             }
2691
2692             $raw .= " # " . encode('utf8', $rule->{comment})
2693                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2694             $raw .= "\n";
2695         } else {
2696             die "unknown rule type '$rule->{type}'";
2697         }
2698     }
2699
2700     return $raw;
2701 };
2702
2703 my $format_options = sub {
2704     my ($options) = @_;
2705
2706     my $raw = '';
2707
2708     $raw .= "[OPTIONS]\n\n";
2709     foreach my $opt (keys %$options) {
2710         $raw .= "$opt: $options->{$opt}\n";
2711     }
2712     $raw .= "\n";
2713
2714     return $raw;
2715 };
2716
2717 my $format_aliases = sub {
2718     my ($aliases) = @_;
2719
2720     my $raw = '';
2721
2722     $raw .= "[ALIASES]\n\n";
2723     foreach my $k (keys %$aliases) {
2724         my $e = $aliases->{$k};
2725         $raw .= "$e->{name} $e->{cidr}";
2726         $raw .= " # " . encode('utf8', $e->{comment})
2727             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2728         $raw .= "\n";
2729     }
2730     $raw .= "\n";
2731
2732     return $raw;
2733 };
2734
2735 my $format_ipsets = sub {
2736     my ($fw_conf) = @_;
2737
2738     my $raw = '';
2739
2740     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2741         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2742             my $utf8comment = encode('utf8', $comment);
2743             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2744         } else {
2745             $raw .= "[IPSET $ipset]\n\n";
2746         }
2747         my $options = $fw_conf->{ipset}->{$ipset};
2748
2749         my $nethash = {};
2750         foreach my $entry (@$options) {
2751             $nethash->{$entry->{cidr}} = $entry;
2752         }
2753
2754         foreach my $cidr (sort keys %$nethash) {
2755             my $entry = $nethash->{$cidr};
2756             my $line = $entry->{nomatch} ? '!' : '';
2757             $line .= $entry->{cidr};
2758             $line .= " # " . encode('utf8', $entry->{comment})
2759                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2760             $raw .= "$line\n";
2761         }
2762
2763         $raw .= "\n";
2764     }
2765
2766     return $raw;
2767 };
2768
2769 sub save_vmfw_conf {
2770     my ($vmid, $vmfw_conf) = @_;
2771
2772     my $raw = '';
2773
2774     my $options = $vmfw_conf->{options};
2775     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2776
2777     my $aliases = $vmfw_conf->{aliases};
2778     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2779
2780     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2781
2782     my $rules = $vmfw_conf->{rules} || [];
2783     if ($rules && scalar(@$rules)) {
2784         $raw .= "[RULES]\n\n";
2785         $raw .= &$format_rules($rules, 1);
2786         $raw .= "\n";
2787     }
2788
2789     mkdir $pvefw_conf_dir;
2790
2791     my $filename = "$pvefw_conf_dir/$vmid.fw";
2792     PVE::Tools::file_set_contents($filename, $raw);
2793 }
2794
2795 sub read_vm_firewall_configs {
2796     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2797
2798     my $vmfw_configs = {};
2799
2800     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2801         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2802         next if !$vmfw_conf->{options}; # skip if file does not exists
2803         $vmfw_configs->{$vmid} = $vmfw_conf;
2804     }
2805     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2806         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2807         next if !$vmfw_conf->{options}; # skip if file does not exists
2808         $vmfw_configs->{$vmid} = $vmfw_conf;
2809     }
2810
2811     return $vmfw_configs;
2812 }
2813
2814 sub get_option_log_level {
2815     my ($options, $k) = @_;
2816
2817     my $v = $options->{$k};
2818     $v = $default_log_level if !defined($v);
2819
2820     return undef if $v eq '' || $v eq 'nolog';
2821
2822     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2823
2824     return $v if ($v >= 0) && ($v <= 7);
2825
2826     warn "unknown log level ($k = '$v')\n";
2827
2828     return undef;
2829 }
2830
2831 sub generate_std_chains {
2832     my ($ruleset, $options, $ipversion) = @_;
2833
2834     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2835
2836     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2837
2838     my $chain;
2839
2840     if ($ipversion == 4) {
2841         # same as shorewall smurflog.
2842         $chain = 'PVEFW-smurflog';
2843         $std_chains->{$chain} = [];
2844
2845         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2846         push @{$std_chains->{$chain}}, "-j DROP";
2847     }
2848
2849     # same as shorewall logflags action.
2850     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2851     $chain = 'PVEFW-logflags';
2852     $std_chains->{$chain} = [];
2853
2854     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2855     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2856     push @{$std_chains->{$chain}}, "-j DROP";
2857
2858     foreach my $chain (keys %$std_chains) {
2859         ruleset_create_chain($ruleset, $chain);
2860         foreach my $rule (@{$std_chains->{$chain}}) {
2861             if (ref($rule)) {
2862                 ruleset_generate_rule($ruleset, $chain, $rule);
2863             } else {
2864                 ruleset_addrule($ruleset, $chain, $rule);
2865             }
2866         }
2867     }
2868 }
2869
2870 sub generate_ipset_chains {
2871     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2872
2873     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2874         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2875         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2876     }
2877 }
2878
2879 sub generate_ipset {
2880     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2881
2882     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2883
2884     $ipset_ruleset->{$name} = ["create $name list:set size 4"];
2885
2886     # remove duplicates
2887     my $nethash = {};
2888     foreach my $entry (@$options) {
2889         next if $entry->{errors}; # skip entries with errors
2890         eval {
2891             my ($cidr, $ipversion);
2892             if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2893                 ($cidr, $ipversion) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2894             } else {
2895                 ($cidr, $ipversion) = parse_ip_or_cidr($entry->{cidr});
2896             }
2897             #http://backreference.org/2013/03/01/ipv6-address-normalization/
2898             if ($ipversion == 6) {
2899                 my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2900                 $cidr = inet_ntop(AF_INET6, $ipv6);
2901                 $cidr =~ s|/128$||;
2902             } else {
2903                 $cidr =~ s|/32$||;
2904             }
2905
2906             $nethash->{$ipversion}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2907         };
2908         warn $@ if $@;
2909     }
2910
2911     foreach my $ipversion (sort keys %$nethash) {
2912         my $data = $nethash->{$ipversion};
2913         my $subname = "$name-v$ipversion";
2914
2915         my $hashsize = scalar(@$options);
2916         if ($hashsize <= 64) {
2917             $hashsize = 64;
2918         } else {
2919             $hashsize = round_powerof2($hashsize);
2920         }
2921
2922         my $family = $ipversion == "6" ? "inet6" : "inet";
2923
2924         $ipset_ruleset->{$subname} = ["create $subname hash:net family $family hashsize $hashsize maxelem $hashsize"];
2925
2926         foreach my $cidr (sort keys %$data) {
2927             my $entry = $data->{$cidr};
2928
2929             my $cmd = "add $subname $cidr";
2930             if ($entry->{nomatch}) {
2931                 if ($feature_ipset_nomatch) {
2932                     push @{$ipset_ruleset->{$subname}}, "$cmd nomatch";
2933                 } else {
2934                     warn "ignore !$cidr - nomatch not supported by kernel\n";
2935                 }
2936             } else {
2937                 push @{$ipset_ruleset->{$subname}}, $cmd;
2938             }
2939         }
2940
2941         push @{$ipset_ruleset->{$name}}, "add $name $subname";
2942     }
2943 }
2944
2945 sub round_powerof2 {
2946     my ($int) = @_;
2947
2948     $int--;
2949     $int |= $int >> $_ foreach (1,2,4,8,16);
2950     return ++$int;
2951 }
2952
2953 sub load_clusterfw_conf {
2954     my ($filename, $verbose) = @_;
2955
2956     $filename = $clusterfw_conf_filename if !defined($filename);
2957
2958     my $cluster_conf = {};
2959     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2960         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2961     }
2962
2963     return $cluster_conf;
2964 }
2965
2966 sub save_clusterfw_conf {
2967     my ($cluster_conf) = @_;
2968
2969     my $raw = '';
2970
2971     my $options = $cluster_conf->{options};
2972     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2973
2974     my $aliases = $cluster_conf->{aliases};
2975     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2976
2977     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2978
2979     my $rules = $cluster_conf->{rules};
2980     if ($rules && scalar(@$rules)) {
2981         $raw .= "[RULES]\n\n";
2982         $raw .= &$format_rules($rules, 1);
2983         $raw .= "\n";
2984     }
2985
2986     if ($cluster_conf->{groups}) {
2987         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2988             my $rules = $cluster_conf->{groups}->{$group};
2989             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2990                 my $utf8comment = encode('utf8', $comment);
2991                 $raw .= "[group $group] # $utf8comment\n\n";
2992             } else {
2993                 $raw .= "[group $group]\n\n";
2994             }
2995
2996             $raw .= &$format_rules($rules, 0);
2997             $raw .= "\n";
2998         }
2999     }
3000
3001     mkdir $pvefw_conf_dir;
3002     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3003 }
3004
3005 sub load_hostfw_conf {
3006     my ($cluster_conf, $filename, $verbose) = @_;
3007
3008     $filename = $hostfw_conf_filename if !defined($filename);
3009
3010     my $hostfw_conf = {};
3011     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3012         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3013     }
3014     return $hostfw_conf;
3015 }
3016
3017 sub save_hostfw_conf {
3018     my ($hostfw_conf) = @_;
3019
3020     my $raw = '';
3021
3022     my $options = $hostfw_conf->{options};
3023     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3024
3025     my $rules = $hostfw_conf->{rules};
3026     if ($rules && scalar(@$rules)) {
3027         $raw .= "[RULES]\n\n";
3028         $raw .= &$format_rules($rules, 1);
3029         $raw .= "\n";
3030     }
3031
3032     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3033 }
3034
3035 sub compile {
3036     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3037
3038     my $vmfw_configs;
3039
3040     if ($vmdata) { # test mode
3041         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3042         my $filename = "$testdir/cluster.fw";
3043         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3044
3045         $filename = "$testdir/host.fw";
3046         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3047
3048         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3049     } else { # normal operation
3050         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3051
3052         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3053
3054         $vmdata = read_local_vm_config();
3055         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3056     }
3057
3058     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3059     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3060
3061     return ($ruleset, $ipset_ruleset, $rulesetv6);
3062 }
3063
3064 sub compile_iptables_filter {
3065     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3066
3067     $cluster_conf->{ipset}->{venet0} = [];
3068     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
3069
3070     my $localnet;
3071     if ($cluster_conf->{aliases}->{local_network}) {
3072         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3073     } else {
3074         $localnet = local_network() || '127.0.0.0/8';
3075         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
3076     }
3077
3078     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3079
3080     return ({}, {}) if !$cluster_conf->{options}->{enable};
3081
3082     my $ruleset = {};
3083
3084     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3085     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3086
3087     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3088
3089     my $hostfw_options = $hostfw_conf->{options} || {};
3090
3091     # fixme: what log level should we use here?
3092     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3093
3094     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3095
3096
3097     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3098     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3099     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3100
3101     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3102     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $ipversion, $loglevel);
3103
3104     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3105
3106     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3107     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3108
3109     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3110     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $ipversion, $loglevel);
3111
3112     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3113
3114     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3115
3116     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3117
3118     my $ipset_ruleset = {};
3119
3120     # currently pveproxy don't works with ipv6, so let's generate host fw ipv4 only for the moment
3121     if ($hostfw_enable && ($ipversion == 4)) {
3122         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3123         warn $@ if $@; # just to be sure - should not happen
3124     }
3125
3126     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3127
3128     # generate firewall rules for QEMU VMs
3129     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3130         eval {
3131             my $conf = $vmdata->{qemu}->{$vmid};
3132             my $vmfw_conf = $vmfw_configs->{$vmid};
3133             return if !$vmfw_conf;
3134
3135             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3136
3137             foreach my $netid (keys %$conf) {
3138                 next if $netid !~ m/^net(\d+)$/;
3139                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3140                 next if !$net->{firewall};
3141                 my $iface = "tap${vmid}i$1";
3142
3143                 my $macaddr = $net->{macaddr};
3144                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3145                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3146                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3147                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3148             }
3149         };
3150         warn $@ if $@; # just to be sure - should not happen
3151     }
3152
3153     # generate firewall rules for OpenVZ containers
3154     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3155         eval {
3156             my $conf = $vmdata->{openvz}->{$vmid};
3157
3158             my $vmfw_conf = $vmfw_configs->{$vmid};
3159             return if !$vmfw_conf;
3160
3161             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3162
3163             if ($vmfw_conf->{options}->{enable}) {
3164                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3165                     my $ip = $conf->{ip_address}->{value};
3166                     $ip =~ s/\s+/,/g;
3167
3168                     my @ips = ();
3169
3170                     foreach my $singleip (split(',', $ip)) {
3171                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3172                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3173                         push @ips, $singleip if $singleip_ver == $ipversion;
3174                     }
3175
3176                     if (scalar(@ips)) {
3177                         my $ip_list = join(',', @ips);
3178                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3179                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3180                     }
3181                 }
3182             }
3183
3184             if ($conf->{netif} && $conf->{netif}->{value}) {
3185                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3186                 foreach my $netid (keys %$netif) {
3187                     my $d = $netif->{$netid};
3188                     my $bridge = $d->{bridge};
3189                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3190                     my $macaddr = $d->{mac};
3191                     my $iface = $d->{host_ifname};
3192                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3193                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3194                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3195                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3196                 }
3197             }
3198         };
3199         warn $@ if $@; # just to be sure - should not happen
3200     }
3201
3202     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3203         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3204     }
3205
3206     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3207
3208     return ($ruleset, $ipset_ruleset);
3209 }
3210
3211 sub get_ruleset_status {
3212     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3213
3214     my $statushash = {};
3215
3216     foreach my $chain (sort keys %$ruleset) {
3217         my $sig = &$digest_fn($ruleset->{$chain});
3218
3219         $statushash->{$chain}->{sig} = $sig;
3220
3221         my $oldsig = $active_chains->{$chain};
3222         if (!defined($oldsig)) {
3223             $statushash->{$chain}->{action} = 'create';
3224         } else {
3225             if ($oldsig eq $sig) {
3226                 $statushash->{$chain}->{action} = 'exists';
3227             } else {
3228                 $statushash->{$chain}->{action} = 'update';
3229             }
3230         }
3231         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3232         foreach my $cmd (@{$ruleset->{$chain}}) {
3233             print "\t$cmd\n" if $verbose;
3234         }
3235     }
3236
3237     foreach my $chain (sort keys %$active_chains) {
3238         if (!defined($ruleset->{$chain})) {
3239             my $sig = $active_chains->{$chain};
3240             $statushash->{$chain}->{action} = 'delete';
3241             $statushash->{$chain}->{sig} = $sig;
3242             print "delete $chain ($sig)\n" if $verbose;
3243         }
3244     }
3245
3246     return $statushash;
3247 }
3248
3249 sub print_sig_rule {
3250     my ($chain, $sig) = @_;
3251
3252     # We just use this to store a SHA1 checksum used to detect changes
3253     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3254 }
3255
3256 sub get_ruleset_cmdlist {
3257     my ($ruleset, $verbose, $iptablescmd) = @_;
3258
3259     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3260
3261     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3262     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3263
3264     # create missing chains first
3265     foreach my $chain (sort keys %$ruleset) {
3266         my $stat = $statushash->{$chain};
3267         die "internal error" if !$stat;
3268         next if $stat->{action} ne 'create';
3269
3270         $cmdlist .= ":$chain - [0:0]\n";
3271     }
3272
3273     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3274         my $chain = "PVEFW-$h";
3275         if ($ruleset->{$chain} && !$hooks->{$h}) {
3276             $cmdlist .= "-A $h -j $chain\n";
3277         }
3278     }
3279
3280     foreach my $chain (sort keys %$ruleset) {
3281         my $stat = $statushash->{$chain};
3282         die "internal error" if !$stat;
3283
3284         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3285             $cmdlist .= "-F $chain\n";
3286             foreach my $cmd (@{$ruleset->{$chain}}) {
3287                 $cmdlist .= "$cmd\n";
3288             }
3289             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3290         } elsif ($stat->{action} eq 'delete') {
3291             die "internal error"; # this should not happen
3292         } elsif ($stat->{action} eq 'exists') {
3293             # do nothing
3294         } else {
3295             die "internal error - unknown status '$stat->{action}'";
3296         }
3297     }
3298
3299     foreach my $chain (keys %$statushash) {
3300         next if $statushash->{$chain}->{action} ne 'delete';
3301         $cmdlist .= "-F $chain\n";
3302     }
3303     foreach my $chain (keys %$statushash) {
3304         next if $statushash->{$chain}->{action} ne 'delete';
3305         next if $chain eq 'PVEFW-INPUT';
3306         next if $chain eq 'PVEFW-OUTPUT';
3307         next if $chain eq 'PVEFW-FORWARD';
3308         $cmdlist .= "-X $chain\n";
3309     }
3310
3311     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3312
3313     $cmdlist .= "COMMIT\n";
3314
3315     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3316 }
3317
3318 sub get_ipset_cmdlist {
3319     my ($ruleset, $verbose) = @_;
3320
3321     my $cmdlist = "";
3322
3323     my $delete_cmdlist = "";
3324
3325     my $active_chains = ipset_get_chains();
3326     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3327
3328     # remove stale _swap chains
3329     foreach my $chain (keys %$active_chains) {
3330         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3331             $cmdlist .= "destroy $chain\n";
3332         }
3333     }
3334
3335     # create -v4 and -v6 chains first
3336     foreach my $chain (keys %$ruleset) {
3337         next if $chain !~ m/-v[46]$/;
3338         my $stat = $statushash->{$chain};
3339         die "internal error" if !$stat;
3340
3341         if ($stat->{action} eq 'create') {
3342             foreach my $cmd (@{$ruleset->{$chain}}) {
3343                 $cmdlist .= "$cmd\n";
3344             }
3345         }
3346     }
3347
3348     # then create list chains which use above -v4 and -v6 chains
3349     foreach my $chain (keys %$ruleset) {
3350         next if $chain =~ m/-v[46]$/;
3351         my $stat = $statushash->{$chain};
3352         die "internal error" if !$stat;
3353
3354         if ($stat->{action} eq 'create') {
3355             foreach my $cmd (@{$ruleset->{$chain}}) {
3356                 $cmdlist .= "$cmd\n";
3357             }
3358         }
3359     }
3360
3361     foreach my $chain (keys %$ruleset) {
3362         my $stat = $statushash->{$chain};
3363         die "internal error" if !$stat;
3364
3365         if ($stat->{action} eq 'update') {
3366             my $chain_swap = $chain."_swap";
3367
3368             foreach my $cmd (@{$ruleset->{$chain}}) {
3369                 $cmd =~ s/$chain/$chain_swap/;
3370                 $cmdlist .= "$cmd\n";
3371             }
3372             $cmdlist .= "swap $chain_swap $chain\n";
3373             $cmdlist .= "flush $chain_swap\n";
3374             $cmdlist .= "destroy $chain_swap\n";
3375         }
3376     }
3377
3378     # remove unused list chains first
3379     foreach my $chain (keys %$statushash) {
3380         next if $statushash->{$chain}->{action} ne 'delete';
3381         next if $chain !~ m/-v[46]$/;
3382
3383         $delete_cmdlist .= "flush $chain\n";
3384         $delete_cmdlist .= "destroy $chain\n";
3385     }
3386
3387     # the remove unused -v4 -v6 chains
3388     foreach my $chain (keys %$statushash) {
3389         next if $statushash->{$chain}->{action} ne 'delete';
3390         next if $chain =~ m/-v[46]$/;
3391
3392         $delete_cmdlist .= "flush $chain\n";
3393         $delete_cmdlist .= "destroy $chain\n";
3394     }
3395
3396     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3397
3398     return ($cmdlist, $delete_cmdlist, $changes);
3399 }
3400
3401 sub apply_ruleset {
3402     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3403
3404     enable_bridge_firewall();
3405
3406     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3407         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3408
3409     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3410     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3411
3412     if ($verbose) {
3413         if ($ipset_changes) {
3414             print "ipset changes:\n";
3415             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3416             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3417         }
3418
3419         if ($changes) {
3420             print "iptables changes:\n";
3421             print $cmdlist;
3422         }
3423
3424         if ($changesv6) {
3425             print "ip6tables changes:\n";
3426             print $cmdlistv6;
3427         }
3428     }
3429
3430     ipset_restore_cmdlist($ipset_create_cmdlist);
3431
3432     iptables_restore_cmdlist($cmdlist);
3433     ip6tables_restore_cmdlist($cmdlistv6);
3434
3435     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3436
3437     # test: re-read status and check if everything is up to date
3438     my $active_chains = iptables_get_chains();
3439     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3440
3441     my $errors;
3442     foreach my $chain (sort keys %$ruleset) {
3443         my $stat = $statushash->{$chain};
3444         if ($stat->{action} ne 'exists') {
3445             warn "unable to update chain '$chain'\n";
3446             $errors = 1;
3447         }
3448     }
3449
3450     my $active_chainsv6 = iptables_get_chains("ip6tables");
3451     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3452
3453     foreach my $chain (sort keys %$rulesetv6) {
3454         my $stat = $statushashv6->{$chain};
3455         if ($stat->{action} ne 'exists') {
3456             warn "unable to update chain '$chain'\n";
3457             $errors = 1;
3458         }
3459     }
3460
3461     die "unable to apply firewall changes\n" if $errors;
3462
3463     update_nf_conntrack_max($hostfw_conf);
3464
3465     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3466
3467 }
3468
3469 sub update_nf_conntrack_max {
3470     my ($hostfw_conf) = @_;
3471
3472     my $max = 65536; # reasonable default
3473
3474     my $options = $hostfw_conf->{options} || {};
3475
3476     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3477         $max = $options->{nf_conntrack_max};
3478         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3479     }
3480
3481     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3482     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3483
3484     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3485
3486     if ($current != $max) {
3487         my $hashsize = int($max/4);
3488         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3489         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3490     }
3491 }
3492
3493 sub update_nf_conntrack_tcp_timeout_established {
3494     my ($hostfw_conf) = @_;
3495
3496     my $options = $hostfw_conf->{options} || {};
3497
3498     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3499
3500     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3501 }
3502
3503 sub remove_pvefw_chains {
3504
3505     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3506     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3507     PVE::Firewall::remove_pvefw_chains_ipset();
3508
3509 }
3510
3511 sub remove_pvefw_chains_iptables {
3512     my ($iptablescmd) = @_;
3513
3514     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3515     my $cmdlist = "*filter\n";
3516
3517     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3518         if ($hooks->{$h}) {
3519             $cmdlist .= "-D $h -j PVEFW-$h\n";
3520         }
3521     }
3522
3523     foreach my $chain (keys %$chash) {
3524         $cmdlist .= "-F $chain\n";
3525     }
3526
3527     foreach my $chain (keys %$chash) {
3528         $cmdlist .= "-X $chain\n";
3529     }
3530     $cmdlist .= "COMMIT\n";
3531
3532     if($iptablescmd eq "ip6tables") {
3533         ip6tables_restore_cmdlist($cmdlist);
3534     } else {
3535         iptables_restore_cmdlist($cmdlist);
3536     }
3537 }
3538
3539 sub remove_pvefw_chains_ipset {
3540
3541     my $ipset_chains = ipset_get_chains();
3542
3543     my $sub_cmdlist = "";
3544     my $cmdlist = "";
3545
3546     foreach my $chain (keys %$ipset_chains) {
3547         if ($chain =~ m/^PVEFW-\S+\-(v4|v6)$/) {
3548            $sub_cmdlist .= "flush $chain\n";
3549            $sub_cmdlist .= "destroy $chain\n";
3550         }else{
3551            $cmdlist .= "flush $chain\n";
3552            $cmdlist .= "destroy $chain\n";
3553         }
3554     }
3555
3556     $cmdlist .= $sub_cmdlist;
3557
3558     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3559 }
3560
3561 sub init {
3562     my $cluster_conf = load_clusterfw_conf();
3563     my $cluster_options = $cluster_conf->{options};
3564     my $enable = $cluster_options->{enable};
3565
3566     return if !$enable;
3567
3568     # load required modules here
3569 }
3570
3571 sub update {
3572     my $code = sub {
3573
3574         my $cluster_conf = load_clusterfw_conf();
3575         my $cluster_options = $cluster_conf->{options};
3576
3577         if (!$cluster_options->{enable}) {
3578             PVE::Firewall::remove_pvefw_chains();
3579             return;
3580         }
3581
3582         my $hostfw_conf = load_hostfw_conf();
3583
3584         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3585
3586         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3587     };
3588
3589     run_locked($code);
3590 }
3591
3592 1;