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 PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'nolog'; # avoid logs by default
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162     ],
 163     'DNS' => [
 164         "Domain Name System traffic (upd and tcp)",
 165         { action => 'PARAM', proto => 'udp', dport => '53' },
 166         { action => 'PARAM', proto => 'tcp', dport => '53' },
 167     ],
 168     'Distcc' => [
 169         "Distributed Compiler service",
 170         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 171     ],
 172     'FTP' => [
 173         "File Transfer Protocol",
 174         { action => 'PARAM', proto => 'tcp', dport => '21' },
 175     ],
 176     'Finger' => [
 177         "Finger protocol (RFC 742)",
 178         { action => 'PARAM', proto => 'tcp', dport => '79' },
 179     ],
 180     'GNUnet' => [
 181         "GNUnet secure peer-to-peer networking traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 183         { action => 'PARAM', proto => 'udp', dport => '2086' },
 184         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 185         { action => 'PARAM', proto => 'udp', dport => '1080' },
 186     ],
 187     'GRE' => [
 188         "Generic Routing Encapsulation tunneling protocol",
 189         { action => 'PARAM', proto => '47' },
 190     ],
 191     'Git' => [
 192         "Git distributed revision control traffic",
 193         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 194     ],
 195     'HKP' => [
 196         "OpenPGP HTTP keyserver protocol traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 198     ],
 199     'HTTP' => [
 200         "Hypertext Transfer Protocol (WWW)",
 201         { action => 'PARAM', proto => 'tcp', dport => '80' },
 202     ],
 203     'HTTPS' => [
 204         "Hypertext Transfer Protocol (WWW) over SSL",
 205         { action => 'PARAM', proto => 'tcp', dport => '443' },
 206     ],
 207     'ICPV2' => [
 208         "Internet Cache Protocol V2 (Squid) traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '3130' },
 210     ],
 211     'ICQ' => [
 212         "AOL Instant Messenger traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 214     ],
 215     'IMAP' => [
 216         "Internet Message Access Protocol",
 217         { action => 'PARAM', proto => 'tcp', dport => '143' },
 218     ],
 219     'IMAPS' => [
 220         "Internet Message Access Protocol over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '993' },
 222     ],
 223     'IPIP' => [
 224         "IPIP capsulation traffic",
 225         { action => 'PARAM', proto => '94' },
 226     ],
 227     'IPsec' => [
 228         "IPsec traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 230         { action => 'PARAM', proto => '50' },
 231     ],
 232     'IPsecah' => [
 233         "IPsec authentication (AH) traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242     ],
 243     'IRC' => [
 244         "Internet Relay Chat traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 246     ],
 247     'Jetdirect' => [
 248         "HP Jetdirect printing",
 249         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 250     ],
 251     'L2TP' => [
 252         "Layer 2 Tunneling Protocol traffic",
 253         { action => 'PARAM', proto => 'udp', dport => '1701' },
 254     ],
 255     'LDAP' => [
 256         "Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '389' },
 258     ],
 259     'LDAPS' => [
 260         "Secure Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '636' },
 262     ],
 263     'MSNP' => [
 264         "Microsoft Notification Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 266     ],
 267     'MSSQL' => [
 268         "Microsoft SQL Server",
 269         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 270     ],
 271     'Mail' => [
 272         "Mail traffic (SMTP, SMTPS, Submission)",
 273         { action => 'PARAM', proto => 'tcp', dport => '25' },
 274         { action => 'PARAM', proto => 'tcp', dport => '465' },
 275         { action => 'PARAM', proto => 'tcp', dport => '587' },
 276     ],
 277     'Munin' => [
 278         "Munin networked resource monitoring traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 280     ],
 281     'MySQL' => [
 282         "MySQL server",
 283         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 284     ],
 285     'NNTP' => [
 286         "NNTP traffic (Usenet).",
 287         { action => 'PARAM', proto => 'tcp', dport => '119' },
 288     ],
 289     'NNTPS' => [
 290         "Encrypted NNTP traffic (Usenet)",
 291         { action => 'PARAM', proto => 'tcp', dport => '563' },
 292     ],
 293     'NTP' => [
 294         "Network Time Protocol (ntpd)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296     ],
 297     'OSPF' => [
 298         "OSPF multicast traffic",
 299         { action => 'PARAM', proto => '89' },
 300     ],
 301     'OpenVPN' => [
 302         "OpenVPN traffic",
 303         { action => 'PARAM', proto => 'udp', dport => '1194' },
 304     ],
 305     'PCA' => [
 306         "Symantec PCAnywere (tm)",
 307         { action => 'PARAM', proto => 'udp', dport => '5632' },
 308         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 309     ],
 310     'POP3' => [
 311         "POP3 traffic",
 312         { action => 'PARAM', proto => 'tcp', dport => '110' },
 313     ],
 314     'POP3S' => [
 315         "Encrypted POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '995' },
 317     ],
 318     'PPtP' => [
 319         "Point-to-Point Tunneling Protocol",
 320         { action => 'PARAM', proto => '47' },
 321         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 322     ],
 323     'Ping' => [
 324         "ICMP echo request",
 325         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 326     ],
 327     'PostgreSQL' => [
 328         "PostgreSQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 330     ],
 331     'Printer' => [
 332         "Line Printer protocol printing",
 333         { action => 'PARAM', proto => 'tcp', dport => '515' },
 334     ],
 335     'RDP' => [
 336         "Microsoft Remote Desktop Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 338     ],
 339     'RIP' => [
 340         "Routing Information Protocol (bidirectional)",
 341         { action => 'PARAM', proto => 'udp', dport => '520' },
 342     ],
 343     'RNDC' => [
 344         "BIND remote management protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '953' },
 346     ],
 347     'Razor' => [
 348         "Razor Antispam System",
 349         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 350     ],
 351     'Rdate' => [
 352         "Remote time retrieval (rdate)",
 353         { action => 'PARAM', proto => 'tcp', dport => '37' },
 354     ],
 355     'Rsync' => [
 356         "Rsync server",
 357         { action => 'PARAM', proto => 'tcp', dport => '873' },
 358     ],
 359     'SANE' => [
 360         "SANE network scanning",
 361         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 362     ],
 363     'SMB' => [
 364         "Microsoft SMB traffic",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369     ],
 370     'SMBswat' => [
 371         "Samba Web Administration Tool",
 372         { action => 'PARAM', proto => 'tcp', dport => '901' },
 373     ],
 374     'SMTP' => [
 375         "Simple Mail Transfer Protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '25' },
 377     ],
 378     'SMTPS' => [
 379         "Encrypted Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '465' },
 381     ],
 382     'SNMP' => [
 383         "Simple Network Management Protocol",
 384         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 385         { action => 'PARAM', proto => 'tcp', dport => '161' },
 386     ],
 387     'SPAMD' => [
 388         "Spam Assassin SPAMD traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '783' },
 390     ],
 391     'SSH' => [
 392         "Secure shell traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '22' },
 394     ],
 395     'SVN' => [
 396         "Subversion server (svnserve)",
 397         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 398     ],
 399     'SixXS' => [
 400         "SixXS IPv6 Deployment and Tunnel Broker",
 401         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 402         { action => 'PARAM', proto => 'udp', dport => '3740' },
 403         { action => 'PARAM', proto => '41' },
 404         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 405     ],
 406     'Squid' => [
 407         "Squid web proxy traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 409     ],
 410     'Submission' => [
 411         "Mail message submission traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '587' },
 413     ],
 414     'Syslog' => [
 415         "Syslog protocol (RFC 5424) traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '514' },
 417         { action => 'PARAM', proto => 'tcp', dport => '514' },
 418     ],
 419     'TFTP' => [
 420         "Trivial File Transfer Protocol traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '69' },
 422     ],
 423     'Telnet' => [
 424         "Telnet traffic",
 425         { action => 'PARAM', proto => 'tcp', dport => '23' },
 426     ],
 427     'Telnets' => [
 428         "Telnet over SSL",
 429         { action => 'PARAM', proto => 'tcp', dport => '992' },
 430     ],
 431     'Time' => [
 432         "RFC 868 Time protocol",
 433         { action => 'PARAM', proto => 'tcp', dport => '37' },
 434     ],
 435     'Trcrt' => [
 436         "Traceroute (for up to 30 hops) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 438         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 439     ],
 440     'VNC' => [
 441         "VNC traffic for VNC display's 0 - 99",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 443     ],
 444     'VNCL' => [
 445         "VNC traffic from Vncservers to Vncviewers in listen mode",
 446         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 447     ],
 448     'Web' => [
 449         "WWW traffic (HTTP and HTTPS)",
 450         { action => 'PARAM', proto => 'tcp', dport => '80' },
 451         { action => 'PARAM', proto => 'tcp', dport => '443' },
 452     ],
 453     'Webcache' => [
 454         "Web Cache/Proxy traffic (port 8080)",
 455         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 456     ],
 457     'Webmin' => [
 458         "Webmin traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 460     ],
 461     'Whois' => [
 462         "Whois (nicname, RFC 3912) traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '43' },
 464     ],
 465 };
 466
 467 my $pve_fw_parsed_macros;
 468 my $pve_fw_macro_descr;
 469 my $pve_fw_preferred_macro_names = {};
 470
 471 my $pve_std_chains = {
 472     'PVEFW-SET-ACCEPT-MARK' => [
 473         "-j MARK --set-mark 1",
 474     ],
 475     'PVEFW-DropBroadcast' => [
 476         # same as shorewall 'Broadcast'
 477         # simply DROP BROADCAST/MULTICAST/ANYCAST
 478         # we can use this to reduce logging
 479         { action => 'DROP', dsttype => 'BROADCAST' },
 480         { action => 'DROP', dsttype => 'MULTICAST' },
 481         { action => 'DROP', dsttype => 'ANYCAST' },
 482         { action => 'DROP', dest => '224.0.0.0/4' },
 483     ],
 484     'PVEFW-reject' => [
 485         # same as shorewall 'reject'
 486         { action => 'DROP', dsttype => 'BROADCAST' },
 487         { action => 'DROP', source => '224.0.0.0/4' },
 488         { action => 'DROP', proto => 'icmp' },
 489         "-p tcp -j REJECT --reject-with tcp-reset",
 490         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 491         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 492         "-j REJECT --reject-with icmp-host-prohibited",
 493     ],
 494     'PVEFW-Drop' => [
 495         # same as shorewall 'Drop', which is equal to DROP,
 496         # but REJECT/DROP some packages to reduce logging,
 497         # and ACCEPT critical ICMP types
 498         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 499         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 500         { action => 'PVEFW-DropBroadcast' },
 501         # ACCEPT critical ICMP types
 502         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 503         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 504         # Drop packets with INVALID state
 505         "-m conntrack --ctstate INVALID -j DROP",
 506         # Drop Microsoft SMB noise
 507         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 508         { action => 'DROP', proto => 'udp', dport => '137:139'},
 509         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 510         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 511         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 512         # Drop new/NotSyn traffic so that it doesn't get logged
 513         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 514         # Drop DNS replies
 515         { action => 'DROP', proto => 'udp', sport => 53 },
 516     ],
 517     'PVEFW-Reject' => [
 518         # same as shorewall 'Reject', which is equal to Reject,
 519         # but REJECT/DROP some packages to reduce logging,
 520         # and ACCEPT critical ICMP types
 521         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 522         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 523         { action => 'PVEFW-DropBroadcast' },
 524         # ACCEPT critical ICMP types
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 526         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 527         # Drop packets with INVALID state
 528         "-m conntrack --ctstate INVALID -j DROP",
 529         # Drop Microsoft SMB noise
 530         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 531         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 532         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 533         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 534         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 535         # Drop new/NotSyn traffic so that it doesn't get logged
 536         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 537         # Drop DNS replies
 538         { action => 'DROP', proto => 'udp', sport => 53 },
 539     ],
 540     'PVEFW-tcpflags' => [
 541         # same as shorewall tcpflags action.
 542         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 543         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 544         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 545         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 546         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 547         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 548     ],
 549     'PVEFW-smurfs' => [
 550         # same as shorewall smurfs action
 551         # Filter packets for smurfs (packets with a broadcast address as the source).
 552         "-s 0.0.0.0/32 -j RETURN",
 553         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 554         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 555     ],
 556 };
 557
 558 # iptables -p icmp -h
 559 my $icmp_type_names = {
 560     any => 1,
 561     'echo-reply' => 1,
 562     'destination-unreachable' => 1,
 563     'network-unreachable' => 1,
 564     'host-unreachable' => 1,
 565     'protocol-unreachable' => 1,
 566     'port-unreachable' => 1,
 567     'fragmentation-needed' => 1,
 568     'source-route-failed' => 1,
 569     'network-unknown' => 1,
 570     'host-unknown' => 1,
 571     'network-prohibited' => 1,
 572     'host-prohibited' => 1,
 573     'TOS-network-unreachable' => 1,
 574     'TOS-host-unreachable' => 1,
 575     'communication-prohibited' => 1,
 576     'host-precedence-violation' => 1,
 577     'precedence-cutoff' => 1,
 578     'source-quench' => 1,
 579     'redirect' => 1,
 580     'network-redirect' => 1,
 581     'host-redirect' => 1,
 582     'TOS-network-redirect' => 1,
 583     'TOS-host-redirect' => 1,
 584     'echo-request' => 1,
 585     'router-advertisement' => 1,
 586     'router-solicitation' => 1,
 587     'time-exceeded' => 1,
 588     'ttl-zero-during-transit' => 1,
 589     'ttl-zero-during-reassembly' => 1,
 590     'parameter-problem' => 1,
 591     'ip-header-bad' => 1,
 592     'required-option-missing' => 1,
 593     'timestamp-request' => 1,
 594     'timestamp-reply' => 1,
 595     'address-mask-request' => 1,
 596     'address-mask-reply' => 1,
 597 };
 598
 599 sub init_firewall_macros {
 600
 601     $pve_fw_parsed_macros = {};
 602
 603     foreach my $k (keys %$pve_fw_macros) {
 604         my $lc_name = lc($k);
 605         my $macro = $pve_fw_macros->{$k};
 606         if (!ref($macro->[0])) {
 607             $pve_fw_macro_descr->{$k} = shift @$macro;
 608         }
 609         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 610         $pve_fw_parsed_macros->{$k} = $macro;
 611     }
 612 }
 613
 614 init_firewall_macros();
 615
 616 sub get_macros {
 617     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 618 }
 619
 620 my $etc_services;
 621
 622 sub get_etc_services {
 623
 624     return $etc_services if $etc_services;
 625
 626     my $filename = "/etc/services";
 627
 628     my $fh = IO::File->new($filename, O_RDONLY);
 629     if (!$fh) {
 630         warn "unable to read '$filename' - $!\n";
 631         return {};
 632     }
 633
 634     my $services = {};
 635
 636     while (my $line = <$fh>) {
 637         chomp ($line);
 638         next if $line =~m/^#/;
 639         next if ($line =~m/^\s*$/);
 640
 641         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 642             $services->{byid}->{$2}->{name} = $1;
 643             $services->{byid}->{$2}->{port} = $2;
 644             $services->{byid}->{$2}->{$3} = 1;
 645             $services->{byname}->{$1} = $services->{byid}->{$2};
 646         }
 647     }
 648
 649     close($fh);
 650
 651     $etc_services = $services;
 652
 653
 654     return $etc_services;
 655 }
 656
 657 my $etc_protocols;
 658
 659 sub get_etc_protocols {
 660     return $etc_protocols if $etc_protocols;
 661
 662     my $filename = "/etc/protocols";
 663
 664     my $fh = IO::File->new($filename, O_RDONLY);
 665     if (!$fh) {
 666         warn "unable to read '$filename' - $!\n";
 667         return {};
 668     }
 669
 670     my $protocols = {};
 671
 672     while (my $line = <$fh>) {
 673         chomp ($line);
 674         next if $line =~m/^#/;
 675         next if ($line =~m/^\s*$/);
 676
 677         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 678             $protocols->{byid}->{$2}->{name} = $1;
 679             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 680         }
 681     }
 682
 683     close($fh);
 684
 685     $etc_protocols = $protocols;
 686
 687     return $etc_protocols;
 688 }
 689
 690 my $ipv4_mask_hash_localnet = {
 691     '255.255.0.0' => 16,
 692     '255.255.128.0' => 17,
 693     '255.255.192.0' => 18,
 694     '255.255.224.0' => 19,
 695     '255.255.240.0' => 20,
 696     '255.255.248.0' => 21,
 697     '255.255.252.0' => 22,
 698     '255.255.254.0' => 23,
 699     '255.255.255.0' => 24,
 700     '255.255.255.128' => 25,
 701     '255.255.255.192' => 26,
 702     '255.255.255.224' => 27,
 703     '255.255.255.240' => 28,
 704     '255.255.255.248' => 29,
 705     '255.255.255.252' => 30,
 706 };
 707
 708 my $__local_network;
 709
 710 sub local_network {
 711     my ($new_value) = @_;
 712
 713     $__local_network = $new_value if defined($new_value);
 714
 715     return $__local_network if defined($__local_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__local_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__local_network;
 740 }
 741
 742 my $max_ipset_name_length = 27;
 743
 744 sub compute_ipset_chain_name {
 745     my ($vmid, $ipset_name) = @_;
 746
 747     $vmid = 0 if !defined($vmid);
 748
 749     my $id = "$vmid-${ipset_name}";
 750
 751
 752     if ((length($id) + 6) > $max_ipset_name_length) {
 753         $id = PVE::Tools::fnv31a_hex($id);
 754     }
 755
 756     return "PVEFW-$id";
 757 }
 758
 759 sub parse_address_list {
 760     my ($str) = @_;
 761
 762     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 763     return if $str =~ m/^${ip_alias_pattern}$/;
 764
 765     my $count = 0;
 766     my $iprange = 0;
 767     foreach my $elem (split(/,/, $str)) {
 768         $count++;
 769         if (!Net::IP->new($elem)) {
 770             my $err = Net::IP::Error();
 771             die "invalid IP address: $err\n";
 772         }
 773         $iprange = 1 if $elem =~ m/-/;
 774     }
 775
 776     die "you can use a range in a list\n" if $iprange && $count > 1;
 777 }
 778
 779 sub parse_port_name_number_or_range {
 780     my ($str) = @_;
 781
 782     my $services = PVE::Firewall::get_etc_services();
 783     my $count = 0;
 784     my $icmp_port = 0;
 785
 786     foreach my $item (split(/,/, $str)) {
 787         $count++;
 788         if ($item =~ m/^(\d+):(\d+)$/) {
 789             my ($port1, $port2) = ($1, $2);
 790             die "invalid port '$port1'\n" if $port1 > 65535;
 791             die "invalid port '$port2'\n" if $port2 > 65535;
 792         } elsif ($item =~ m/^(\d+)$/) {
 793             my $port = $1;
 794             die "invalid port '$port'\n" if $port > 65535;
 795         } else {
 796             if ($icmp_type_names->{$item}) {
 797                 $icmp_port = 1;
 798             } else {
 799                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 800             }
 801         }
 802     }
 803
 804     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 805
 806     return $count;
 807 }
 808
 809 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 810 sub pve_fw_verify_port_spec {
 811    my ($portstr) = @_;
 812
 813    parse_port_name_number_or_range($portstr);
 814
 815    return $portstr;
 816 }
 817
 818 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 819 sub pve_fw_verify_v4addr_spec {
 820    my ($list) = @_;
 821
 822    parse_address_list($list);
 823
 824    return $list;
 825 }
 826
 827 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 828 sub pve_fw_verify_protocol_spec {
 829    my ($proto) = @_;
 830
 831    my $protocols = get_etc_protocols();
 832
 833    die "unknown protocol '$proto'\n" if $proto &&
 834        !(defined($protocols->{byname}->{$proto}) ||
 835          defined($protocols->{byid}->{$proto}));
 836
 837    return $proto;
 838 }
 839
 840
 841 # helper function for API
 842
 843 sub copy_opject_with_digest {
 844     my ($object) = @_;
 845
 846     my $sha = Digest::SHA->new('sha1');
 847
 848     my $res = {};
 849     foreach my $k (sort keys %$object) {
 850         my $v = $object->{$k};
 851         next if !defined($v);
 852         $res->{$k} = $v;
 853         $sha->add($k, ':', $v, "\n");
 854     }
 855
 856     my $digest = $sha->hexdigest;
 857
 858     $res->{digest} = $digest;
 859
 860     return wantarray ? ($res, $digest) : $res;
 861 }
 862
 863 sub copy_list_with_digest {
 864     my ($list) = @_;
 865
 866     my $sha = Digest::SHA->new('sha1');
 867
 868     my $res = [];
 869     foreach my $entry (@$list) {
 870         my $data = {};
 871         foreach my $k (sort keys %$entry) {
 872             my $v = $entry->{$k};
 873             next if !defined($v);
 874             $data->{$k} = $v;
 875             # Note: digest ignores refs ($rule->{errors})
 876             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 877         }
 878         push @$res, $data;
 879     }
 880
 881     my $digest = $sha->hexdigest;
 882
 883     foreach my $entry (@$res) {
 884         $entry->{digest} = $digest;
 885     }
 886
 887     return wantarray ? ($res, $digest) : $res;
 888 }
 889
 890 my $rule_properties = {
 891     pos => {
 892         description => "Update rule at position <pos>.",
 893         type => 'integer',
 894         minimum => 0,
 895         optional => 1,
 896     },
 897     digest => get_standard_option('pve-config-digest'),
 898     type => {
 899         type => 'string',
 900         optional => 1,
 901         enum => ['in', 'out', 'group'],
 902     },
 903     action => {
 904         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 905         type => 'string',
 906         optional => 1,
 907         pattern => $security_group_name_pattern,
 908         maxLength => 20,
 909         minLength => 2,
 910     },
 911     macro => {
 912         type => 'string',
 913         optional => 1,
 914         maxLength => 128,
 915     },
 916     iface => get_standard_option('pve-iface', { optional => 1 }),
 917     source => {
 918         type => 'string', format => 'pve-fw-v4addr-spec',
 919         optional => 1,
 920     },
 921     dest => {
 922         type => 'string', format => 'pve-fw-v4addr-spec',
 923         optional => 1,
 924     },
 925     proto => {
 926         type => 'string', format => 'pve-fw-protocol-spec',
 927         optional => 1,
 928     },
 929     enable => {
 930         type => 'boolean',
 931         optional => 1,
 932     },
 933     sport => {
 934         type => 'string', format => 'pve-fw-port-spec',
 935         optional => 1,
 936     },
 937     dport => {
 938         type => 'string', format => 'pve-fw-port-spec',
 939         optional => 1,
 940     },
 941     comment => {
 942         type => 'string',
 943         optional => 1,
 944     },
 945 };
 946
 947 sub add_rule_properties {
 948     my ($properties) = @_;
 949
 950     foreach my $k (keys %$rule_properties) {
 951         my $h = $rule_properties->{$k};
 952         # copy data, so that we can modify later without side effects
 953         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 954     }
 955
 956     return $properties;
 957 }
 958
 959 sub delete_rule_properties {
 960     my ($rule, $delete_str) = @_;
 961
 962     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 963         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 964             if !defined($rule_properties->{$opt});
 965         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 966             if $opt eq 'type' || $opt eq 'action';
 967         delete $rule->{$opt};
 968     }
 969
 970     return $rule;
 971 }
 972
 973 my $apply_macro = sub {
 974     my ($macro_name, $param, $verify) = @_;
 975
 976     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 977     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 978
 979     my $rules = [];
 980
 981     foreach my $templ (@$macro_rules) {
 982         my $rule = {};
 983         my $param_used = {};
 984         foreach my $k (keys %$templ) {
 985             my $v = $templ->{$k};
 986             if ($v eq 'PARAM') {
 987                 $v = $param->{$k};
 988                 $param_used->{$k} = 1;
 989             } elsif ($v eq 'DEST') {
 990                 $v = $param->{dest};
 991                 $param_used->{dest} = 1;
 992             } elsif ($v eq 'SOURCE') {
 993                 $v = $param->{source};
 994                 $param_used->{source} = 1;
 995             }
 996
 997             if (!defined($v)) {
 998                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 999                 raise_param_exc({ macro => $msg }) if $verify;
1000                 die "$msg\n";
1001             }
1002             $rule->{$k} = $v;
1003         }
1004         foreach my $k (keys %$param) {
1005             next if $k eq 'macro';
1006             next if !defined($param->{$k});
1007             next if $param_used->{$k};
1008             if (defined($rule->{$k})) {
1009                 if ($rule->{$k} ne $param->{$k}) {
1010                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1011                     raise_param_exc({ $k => $msg }) if $verify;
1012                     die "$msg\n";
1013                 }
1014             } else {
1015                 $rule->{$k} = $param->{$k};
1016             }
1017         }
1018         push @$rules, $rule;
1019     }
1020
1021     return $rules;
1022 };
1023
1024 my $rule_env_iface_lookup = {
1025     'ct' => 1,
1026     'vm' => 1,
1027     'group' => 0,
1028     'cluster' => 1,
1029     'host' => 1,
1030 };
1031
1032 sub verify_rule {
1033     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1034
1035     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1036
1037     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1038     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1039
1040     my $errors = $rule->{errors} || {};
1041
1042     my $error_count = 0;
1043
1044     my $add_error = sub {
1045         my ($param, $msg)  = @_;
1046         chomp $msg;
1047         raise_param_exc({ $param => $msg }) if !$noerr;
1048         $error_count++;
1049         $errors->{$param} = $msg if !$errors->{$param};
1050     };
1051
1052     my $check_ipset_or_alias_property = sub {
1053         my ($name) = @_;
1054
1055         if (my $value = $rule->{$name}) {
1056             if ($value =~ m/^\+/) {
1057                 if ($value =~ m/^\+(${security_group_name_pattern})$/) {
1058                     &$add_error($name, "no such ipset '$1'")
1059                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1060
1061                 } else {
1062                     &$add_error($name, "invalid security group name '$value'");
1063                 }
1064             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1065                 my $alias = lc($value);
1066                 &$add_error($name, "no such alias '$value'")
1067                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1068             }
1069         }
1070     };
1071
1072     my $type = $rule->{type};
1073     my $action = $rule->{action};
1074
1075     &$add_error('type', "missing property") if !$type;
1076     &$add_error('action', "missing property") if !$action;
1077
1078     if ($type) {
1079         if ($type eq  'in' || $type eq 'out') {
1080             &$add_error('action', "unknown action '$action'")
1081                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1082         } elsif ($type eq 'group') {
1083             &$add_error('type', "security groups not allowed")
1084                 if !$allow_groups;
1085             &$add_error('action', "invalid characters in security group name")
1086                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1087         } else {
1088             &$add_error('type', "unknown rule type '$type'");
1089         }
1090     }
1091
1092     if ($rule->{iface}) {
1093         &$add_error('type', "parameter -i not allowed for this rule type")
1094             if !$allow_iface;
1095         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1096         &$add_error('iface', $@) if $@;
1097         if ($rule_env eq 'vm') {
1098             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1099                 if $rule->{iface} !~  m/^net(\d+)$/;
1100         } elsif ($rule_env eq 'ct') {
1101             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1102                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1103         }
1104     }
1105
1106     if ($rule->{macro}) {
1107         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1108             $rule->{macro} = $preferred_name;
1109         } else {
1110             &$add_error('macro', "unknown macro '$rule->{macro}'");
1111         }
1112     }
1113
1114     if ($rule->{proto}) {
1115         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1116         &$add_error('proto', $@) if $@;
1117     }
1118
1119     if ($rule->{dport}) {
1120         eval { parse_port_name_number_or_range($rule->{dport}); };
1121         &$add_error('dport', $@) if $@;
1122         &$add_error('proto', "missing property - 'dport' requires this property")
1123             if !$rule->{proto};
1124     }
1125
1126     if ($rule->{sport}) {
1127         eval { parse_port_name_number_or_range($rule->{sport}); };
1128         &$add_error('sport', $@) if $@;
1129         &$add_error('proto', "missing property - 'sport' requires this property")
1130             if !$rule->{proto};
1131     }
1132
1133     if ($rule->{source}) {
1134         eval { parse_address_list($rule->{source}); };
1135         &$add_error('source', $@) if $@;
1136         &$check_ipset_or_alias_property('source');
1137     }
1138
1139     if ($rule->{dest}) {
1140         eval { parse_address_list($rule->{dest}); };
1141         &$add_error('dest', $@) if $@;
1142         &$check_ipset_or_alias_property('dest');
1143     }
1144
1145     if ($rule->{macro} && !$error_count) {
1146         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1147         if (my $err = $@) {
1148             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1149                 my $eh = $err->{errors};
1150                 foreach my $p (keys %$eh) {
1151                     &$add_error($p, $eh->{$p});
1152                 }
1153             } else {
1154                 &$add_error('macro', "$err");
1155             }
1156         }
1157     }
1158
1159     $rule->{errors} = $errors if $error_count;
1160
1161     return $rule;
1162 }
1163
1164 sub copy_rule_data {
1165     my ($rule, $param) = @_;
1166
1167     foreach my $k (keys %$rule_properties) {
1168         if (defined(my $v = $param->{$k})) {
1169             if ($v eq '' || $v eq '-') {
1170                 delete $rule->{$k};
1171             } else {
1172                 $rule->{$k} = $v;
1173             }
1174         }
1175     }
1176
1177     return $rule;
1178 }
1179
1180 # core functions
1181 my $bridge_firewall_enabled = 0;
1182
1183 sub enable_bridge_firewall {
1184
1185     return if $bridge_firewall_enabled; # only once
1186
1187     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1188     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1189
1190     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1191     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1192
1193     $bridge_firewall_enabled = 1;
1194 }
1195
1196 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1197
1198 sub iptables_restore_cmdlist {
1199     my ($cmdlist) = @_;
1200
1201     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1202 }
1203
1204 sub ipset_restore_cmdlist {
1205     my ($cmdlist) = @_;
1206
1207     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1208 }
1209
1210 sub iptables_get_chains {
1211
1212     my $res = {};
1213
1214     # check what chains we want to track
1215     my $is_pvefw_chain = sub {
1216         my $name = shift;
1217
1218         return 1 if $name =~ m/^PVEFW-\S+$/;
1219
1220         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1221
1222         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1223
1224         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1225
1226         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1227         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1228
1229         return undef;
1230     };
1231
1232     my $table = '';
1233
1234     my $hooks = {};
1235
1236     my $parser = sub {
1237         my $line = shift;
1238
1239         return if $line =~ m/^#/;
1240         return if $line =~ m/^\s*$/;
1241
1242         if ($line =~ m/^\*(\S+)$/) {
1243             $table = $1;
1244             return;
1245         }
1246
1247         return if $table ne 'filter';
1248
1249         if ($line =~ m/^:(\S+)\s/) {
1250             my $chain = $1;
1251             return if !&$is_pvefw_chain($chain);
1252             $res->{$chain} = "unknown";
1253         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1254             my ($chain, $sig) = ($1, $2);
1255             return if !&$is_pvefw_chain($chain);
1256             $res->{$chain} = $sig;
1257         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1258             $hooks->{$1} = 1;
1259         } else {
1260             # simply ignore the rest
1261             return;
1262         }
1263     };
1264
1265     run_command("/sbin/iptables-save", outfunc => $parser);
1266
1267     return wantarray ? ($res, $hooks) : $res;
1268 }
1269
1270 sub iptables_chain_digest {
1271     my ($rules) = @_;
1272     my $digest = Digest::SHA->new('sha1');
1273     foreach my $rule (@$rules) { # order is important
1274         $digest->add($rule);
1275     }
1276     return $digest->b64digest;
1277 }
1278
1279 sub ipset_chain_digest {
1280     my ($rules) = @_;
1281
1282     my $digest = Digest::SHA->new('sha1');
1283     foreach my $rule (sort @$rules) { # note: sorted
1284         $digest->add($rule);
1285     }
1286     return $digest->b64digest;
1287 }
1288
1289 sub ipset_get_chains {
1290
1291     my $res = {};
1292     my $chains = {};
1293
1294     my $parser = sub {
1295         my $line = shift;
1296
1297         return if $line =~ m/^#/;
1298         return if $line =~ m/^\s*$/;
1299         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1300             my $chain = $1;
1301             $line =~ s/\s+$//; # delete trailing white space
1302             push @{$chains->{$chain}}, $line;
1303         } else {
1304             # simply ignore the rest
1305             return;
1306         }
1307     };
1308
1309     run_command("/usr/sbin/ipset save", outfunc => $parser);
1310
1311     # compute digest for each chain
1312     foreach my $chain (keys %$chains) {
1313         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1314     }
1315
1316     return $res;
1317 }
1318
1319 sub ruleset_generate_cmdstr {
1320     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1321
1322     return if defined($rule->{enable}) && !$rule->{enable};
1323     return if $rule->{errors};
1324
1325     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1326
1327     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1328     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1329
1330     my @cmd = ();
1331
1332     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1333     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1334
1335     my $source = $rule->{source};
1336     my $dest = $rule->{dest};
1337
1338     if ($source) {
1339         if ($source =~ m/^\+/) {
1340             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1341                 my $name = $1;
1342                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1343                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1344                     push @cmd, "-m set --match-set ${ipset_chain} src";
1345                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1346                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1347                     push @cmd, "-m set --match-set ${ipset_chain} src";
1348                 } else {
1349                     die "no such ipset '$name'\n";
1350                 }
1351             } else {
1352                 die "invalid security group name '$source'\n";
1353             }
1354         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1355             my $alias = lc($source);
1356             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1357             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1358             die "no such alias '$source'\n" if !$e;
1359             push @cmd, "-s $e->{cidr}";
1360         } elsif ($source =~ m/\-/){
1361             push @cmd, "-m iprange --src-range $source";
1362         } else {
1363             push @cmd, "-s $source";
1364         }
1365     }
1366
1367     if ($dest) {
1368         if ($dest =~ m/^\+/) {
1369             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1370                 my $name = $1;
1371                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1372                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1373                     push @cmd, "-m set --match-set ${ipset_chain} src";
1374                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1375                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1376                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1377                 } else {
1378                     die "no such ipset '$name'\n";
1379                 }
1380             } else {
1381                 die "invalid security group name '$dest'\n";
1382             }
1383         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1384             my $alias = lc($dest);
1385             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1386             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1387             die "no such alias '$dest'\n" if !$e;
1388             push @cmd, "-d $e->{cidr}";
1389         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1390             push @cmd, "-m iprange --dst-range $dest";
1391         } else {
1392             push @cmd, "-d $dest";
1393         }
1394     }
1395
1396     if ($rule->{proto}) {
1397         push @cmd, "-p $rule->{proto}";
1398
1399         my $multiport = 0;
1400         $multiport++ if $nbdport > 1;
1401         $multiport++ if $nbsport > 1;
1402
1403         push @cmd, "--match multiport" if $multiport;
1404
1405         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1406             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1407
1408         if ($rule->{dport}) {
1409             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1410                 # Note: we use dport to store --icmp-type
1411                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1412                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1413             } else {
1414                 if ($nbdport > 1) {
1415                     if ($multiport == 2) {
1416                         push @cmd,  "--ports $rule->{dport}";
1417                     } else {
1418                         push @cmd, "--dports $rule->{dport}";
1419                     }
1420                 } else {
1421                     push @cmd, "--dport $rule->{dport}";
1422                 }
1423             }
1424         }
1425
1426         if ($rule->{sport}) {
1427             if ($nbsport > 1) {
1428                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1429             } else {
1430                 push @cmd, "--sport $rule->{sport}";
1431             }
1432         }
1433     } elsif ($rule->{dport} || $rule->{sport}) {
1434         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1435         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1436     }
1437
1438     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1439
1440     if (my $action = $rule->{action}) {
1441         $action = $actions->{$action} if defined($actions->{$action});
1442         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1443         push @cmd, $goto ? "-g $action" : "-j $action";
1444     }
1445
1446     return scalar(@cmd) ? join(' ', @cmd) : undef;
1447 }
1448
1449 sub ruleset_generate_rule {
1450     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1451
1452     my $rules;
1453
1454     if ($rule->{macro}) {
1455         $rules = &$apply_macro($rule->{macro}, $rule);
1456     } else {
1457         $rules = [ $rule ];
1458     }
1459
1460     # update all or nothing
1461
1462     my @cmds = ();
1463     foreach my $tmp (@$rules) {
1464         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1465             push @cmds, $cmdstr;
1466         }
1467     }
1468
1469     foreach my $cmdstr (@cmds) {
1470         ruleset_addrule($ruleset, $chain, $cmdstr);
1471     }
1472 }
1473
1474 sub ruleset_generate_rule_insert {
1475     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1476
1477     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1478
1479     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1480         ruleset_insertrule($ruleset, $chain, $cmdstr);
1481     }
1482 }
1483
1484 sub ruleset_create_chain {
1485     my ($ruleset, $chain) = @_;
1486
1487     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1488     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1489
1490     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1491
1492     $ruleset->{$chain} = [];
1493 }
1494
1495 sub ruleset_chain_exist {
1496     my ($ruleset, $chain) = @_;
1497
1498     return $ruleset->{$chain} ? 1 : undef;
1499 }
1500
1501 sub ruleset_addrule {
1502    my ($ruleset, $chain, $rule) = @_;
1503
1504    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1505
1506    push @{$ruleset->{$chain}}, "-A $chain $rule";
1507 }
1508
1509 sub ruleset_insertrule {
1510    my ($ruleset, $chain, $rule) = @_;
1511
1512    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1513
1514    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1515 }
1516
1517 sub get_log_rule_base {
1518     my ($chain, $vmid, $msg, $loglevel) = @_;
1519
1520     die "internal error - no log level" if !defined($loglevel);
1521
1522     $vmid = 0 if !defined($vmid);
1523
1524     # Note: we use special format for prefix to pass further
1525     # info to log daemon (VMID, LOGVELEL and CHAIN)
1526
1527     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1528 }
1529
1530 sub ruleset_addlog {
1531     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1532
1533     return if !defined($loglevel);
1534
1535     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1536
1537     $logrule = "$rule $logrule" if defined($rule);
1538
1539     ruleset_addrule($ruleset, $chain, $logrule);
1540 }
1541
1542 sub ruleset_add_chain_policy {
1543     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1544
1545     if ($policy eq 'ACCEPT') {
1546
1547         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1548                               { ACCEPT =>  $accept_action});
1549
1550     } elsif ($policy eq 'DROP') {
1551
1552         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1553
1554         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1555
1556         ruleset_addrule($ruleset, $chain, "-j DROP");
1557     } elsif ($policy eq 'REJECT') {
1558         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1559
1560         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1561
1562         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1563     } else {
1564         # should not happen
1565         die "internal error: unknown policy '$policy'";
1566     }
1567 }
1568
1569 sub ruleset_chain_add_conn_filters {
1570     my ($ruleset, $chain, $accept) = @_;
1571
1572     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1573     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1574 }
1575
1576 sub ruleset_chain_add_input_filters {
1577     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1578
1579     if ($cluster_conf->{ipset}->{blacklist}){
1580         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1581             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1582             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1583             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1584         }
1585         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1586         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1587     }
1588
1589     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1590         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1591     }
1592
1593     if ($options->{tcpflags}) {
1594         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1595     }
1596 }
1597
1598 sub ruleset_create_vm_chain {
1599     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1600
1601     ruleset_create_chain($ruleset, $chain);
1602     my $accept = generate_nfqueue($options);
1603
1604     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1605         if ($direction eq 'OUT') {
1606             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1607                                                       proto => 'udp', sport => 68, dport => 67 });
1608         } else {
1609             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1610                                                       proto => 'udp', sport => 67, dport => 68 });
1611         }
1612     }
1613
1614     if ($direction eq 'OUT') {
1615         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1616             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1617         }
1618         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1619     }
1620 }
1621
1622 sub ruleset_add_group_rule {
1623     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1624
1625     my $group = $rule->{action};
1626     my $group_chain = "GROUP-$group-$direction";
1627     if(!ruleset_chain_exist($ruleset, $group_chain)){
1628         generate_group_rules($ruleset, $cluster_conf, $group);
1629     }
1630
1631     if ($direction eq 'OUT' && $rule->{iface_out}) {
1632         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1633     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1634         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1635     } else {
1636         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1637     }
1638
1639     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1640 }
1641
1642 sub ruleset_generate_vm_rules {
1643     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1644
1645     my $lc_direction = lc($direction);
1646
1647     my $in_accept = generate_nfqueue($options);
1648
1649     foreach my $rule (@$rules) {
1650         next if $rule->{iface} && $rule->{iface} ne $netid;
1651         next if !$rule->{enable} || $rule->{errors};
1652         if ($rule->{type} eq 'group') {
1653             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1654                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1655         } else {
1656             next if $rule->{type} ne $lc_direction;
1657             eval {
1658                 if ($direction eq 'OUT') {
1659                     ruleset_generate_rule($ruleset, $chain, $rule,
1660                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1661                                           undef, $cluster_conf, $vmfw_conf);
1662                 } else {
1663                     ruleset_generate_rule($ruleset, $chain, $rule,
1664                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1665                                           undef, $cluster_conf, $vmfw_conf);
1666                 }
1667             };
1668             warn $@ if $@;
1669         }
1670     }
1671 }
1672
1673 sub generate_nfqueue {
1674     my ($options) = @_;
1675
1676     if ($options->{ips}) {
1677         my $action = "NFQUEUE";
1678         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1679             if (defined($3) && defined($1)) {
1680                 $action .= " --queue-balance $1:$3";
1681             } elsif (defined($1)) {
1682                 $action .= " --queue-num $1";
1683             }
1684         }
1685         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1686         return $action;
1687     } else {
1688         return "ACCEPT";
1689     }
1690 }
1691
1692 sub ruleset_generate_vm_ipsrules {
1693     my ($ruleset, $options, $direction, $iface) = @_;
1694
1695     if ($options->{ips} && $direction eq 'IN') {
1696         my $nfqueue = generate_nfqueue($options);
1697
1698         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1699             ruleset_create_chain($ruleset, "PVEFW-IPS");
1700         }
1701
1702         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1703     }
1704 }
1705
1706 sub generate_venet_rules_direction {
1707     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1708
1709     my $lc_direction = lc($direction);
1710
1711     my $rules = $vmfw_conf->{rules};
1712
1713     my $options = $vmfw_conf->{options};
1714     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1715
1716     my $chain = "venet0-$vmid-$direction";
1717
1718     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1719
1720     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1721
1722     # implement policy
1723     my $policy;
1724
1725     if ($direction eq 'OUT') {
1726         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1727     } else {
1728         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1729     }
1730
1731     my $accept = generate_nfqueue($options);
1732     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1733     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1734
1735     if ($direction eq 'OUT') {
1736         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1737             action => $chain,
1738             source => $ip,
1739             iface_in => 'venet0'});
1740     } else {
1741         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1742             action => $chain,
1743             dest => $ip,
1744             iface_out => 'venet0'});
1745     }
1746 }
1747
1748 sub generate_tap_rules_direction {
1749     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1750
1751     my $lc_direction = lc($direction);
1752
1753     my $rules = $vmfw_conf->{rules};
1754
1755     my $options = $vmfw_conf->{options};
1756     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1757
1758     my $tapchain = "$iface-$direction";
1759
1760     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1761
1762     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1763
1764     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1765
1766     # implement policy
1767     my $policy;
1768
1769     if ($direction eq 'OUT') {
1770         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1771     } else {
1772         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1773     }
1774
1775     my $accept = generate_nfqueue($options);
1776     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1777     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1778
1779     # plug the tap chain to bridge chain
1780     if ($direction eq 'IN') {
1781         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1782                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1783     } else {
1784         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1785                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1786     }
1787 }
1788
1789 sub enable_host_firewall {
1790     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1791
1792     my $options = $hostfw_conf->{options};
1793     my $cluster_options = $cluster_conf->{options};
1794     my $rules = $hostfw_conf->{rules};
1795     my $cluster_rules = $cluster_conf->{rules};
1796
1797     # host inbound firewall
1798     my $chain = "PVEFW-HOST-IN";
1799     ruleset_create_chain($ruleset, $chain);
1800
1801     my $loglevel = get_option_log_level($options, "log_level_in");
1802
1803     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1804
1805     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1806     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1807
1808     # we use RETURN because we need to check also tap rules
1809     my $accept_action = 'RETURN';
1810
1811     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1812
1813     # add host rules first, so that cluster wide rules can be overwritten
1814     foreach my $rule (@$rules, @$cluster_rules) {
1815         next if !$rule->{enable} || $rule->{errors};
1816
1817         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1818
1819         eval {
1820             if ($rule->{type} eq 'group') {
1821                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1822             } elsif ($rule->{type} eq 'in') {
1823                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1824                                       undef, $cluster_conf, $hostfw_conf);
1825             }
1826         };
1827         warn $@ if $@;
1828         delete $rule->{iface_in};
1829     }
1830
1831     # allow standard traffic for management ipset (includes cluster network)
1832     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1833     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1834     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1835     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1836     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1837     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1838
1839     my $localnet = local_network();
1840
1841     # corosync
1842     if ($localnet) {
1843         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1844         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1845         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1846     }
1847
1848     # implement input policy
1849     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1850     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1851
1852     # host outbound firewall
1853     $chain = "PVEFW-HOST-OUT";
1854     ruleset_create_chain($ruleset, $chain);
1855
1856     $loglevel = get_option_log_level($options, "log_level_out");
1857
1858     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1859
1860     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1861
1862     # we use RETURN because we may want to check other thigs later
1863     $accept_action = 'RETURN';
1864
1865     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1866
1867     # add host rules first, so that cluster wide rules can be overwritten
1868     foreach my $rule (@$rules, @$cluster_rules) {
1869         next if !$rule->{enable} || $rule->{errors};
1870
1871         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1872         eval {
1873             if ($rule->{type} eq 'group') {
1874                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1875             } elsif ($rule->{type} eq 'out') {
1876                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1877                                       undef, $cluster_conf, $hostfw_conf);
1878             }
1879         };
1880         warn $@ if $@;
1881         delete $rule->{iface_out};
1882     }
1883
1884     # allow standard traffic on cluster network
1885     if ($localnet) {
1886         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1887         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1888         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1889         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1890
1891         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1892         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1893         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1894     }
1895
1896     # implement output policy
1897     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1898     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1899
1900     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1901     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1902 }
1903
1904 sub generate_group_rules {
1905     my ($ruleset, $cluster_conf, $group) = @_;
1906
1907     my $rules = $cluster_conf->{groups}->{$group};
1908
1909     if (!$rules) {
1910         warn "no such security group '$group'\n";
1911         $rules = []; # create empty chain
1912     }
1913
1914     my $chain = "GROUP-${group}-IN";
1915
1916     ruleset_create_chain($ruleset, $chain);
1917     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1918
1919     foreach my $rule (@$rules) {
1920         next if $rule->{type} ne 'in';
1921         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1922     }
1923
1924     $chain = "GROUP-${group}-OUT";
1925
1926     ruleset_create_chain($ruleset, $chain);
1927     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1928
1929     foreach my $rule (@$rules) {
1930         next if $rule->{type} ne 'out';
1931         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1932         # check also other tap rules later
1933         ruleset_generate_rule($ruleset, $chain, $rule,
1934                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1935     }
1936 }
1937
1938 my $MAX_NETS = 32;
1939 my $valid_netdev_names = {};
1940 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1941     $valid_netdev_names->{"net$i"} = 1;
1942 }
1943
1944 sub parse_fw_rule {
1945     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1946
1947     chomp $line;
1948
1949     my $orig_line = $line;
1950
1951     my $rule = {};
1952
1953     # we can add single line comments to the end of the rule
1954     if ($line =~ s/#\s*(.*?)\s*$//) {
1955         $rule->{comment} = decode('utf8', $1);
1956     }
1957
1958     # we can disable a rule when prefixed with '|'
1959
1960     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1961
1962     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1963         die "unable to parse rule: $line\n";
1964
1965     $rule->{type} = lc($1);
1966     $rule->{action} = $2;
1967
1968     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1969         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1970             $rule->{macro} = $1;
1971             $rule->{action} = $2;
1972         }
1973     }
1974
1975     while (length($line)) {
1976         if ($line =~ s/^-i (\S+)\s*//) {
1977             $rule->{iface} = $1;
1978             next;
1979         }
1980
1981         last if $rule->{type} eq 'group';
1982
1983         if ($line =~ s/^-p (\S+)\s*//) {
1984             $rule->{proto} = $1;
1985             next;
1986         }
1987
1988         if ($line =~ s/^-dport (\S+)\s*//) {
1989             $rule->{dport} = $1;
1990             next;
1991         }
1992
1993         if ($line =~ s/^-sport (\S+)\s*//) {
1994             $rule->{sport} = $1;
1995             next;
1996         }
1997         if ($line =~ s/^-source (\S+)\s*//) {
1998             $rule->{source} = $1;
1999             next;
2000         }
2001         if ($line =~ s/^-dest (\S+)\s*//) {
2002             $rule->{dest} = $1;
2003             next;
2004         }
2005
2006         last;
2007     }
2008
2009     die "unable to parse rule parameters: $line\n" if length($line);
2010
2011     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2012     if ($verbose && $rule->{errors}) {
2013         warn "$prefix - errors in rule parameters: $orig_line\n";
2014         foreach my $p (keys %{$rule->{errors}}) {
2015             warn "  $p: $rule->{errors}->{$p}\n";
2016         }
2017     }
2018
2019     return $rule;
2020 }
2021
2022 sub parse_vmfw_option {
2023     my ($line) = @_;
2024
2025     my ($opt, $value);
2026
2027     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2028
2029     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2030         $opt = lc($1);
2031         $value = int($2);
2032     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2033         $opt = lc($1);
2034         $value = $2 ? lc($3) : '';
2035     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2036         $opt = lc($1);
2037         $value = uc($3);
2038     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2039         $opt = lc($1);
2040         $value = $2;
2041     } else {
2042         chomp $line;
2043         die "can't parse option '$line'\n"
2044     }
2045
2046     return ($opt, $value);
2047 }
2048
2049 sub parse_hostfw_option {
2050     my ($line) = @_;
2051
2052     my ($opt, $value);
2053
2054     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2055
2056     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2057         $opt = lc($1);
2058         $value = int($2);
2059     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2060         $opt = lc($1);
2061         $value = $2 ? lc($3) : '';
2062     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2063         $opt = lc($1);
2064         $value = int($2);
2065     } else {
2066         chomp $line;
2067         die "can't parse option '$line'\n"
2068     }
2069
2070     return ($opt, $value);
2071 }
2072
2073 sub parse_clusterfw_option {
2074     my ($line) = @_;
2075
2076     my ($opt, $value);
2077
2078     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2079         $opt = lc($1);
2080         $value = int($2);
2081     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2082         $opt = lc($1);
2083         $value = uc($3);
2084     } else {
2085         chomp $line;
2086         die "can't parse option '$line'\n"
2087     }
2088
2089     return ($opt, $value);
2090 }
2091
2092 sub parse_alias {
2093     my ($line) = @_;
2094
2095     # we can add single line comments to the end of the line
2096     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2097
2098     if ($line =~ m/^(\S+)\s(\S+)$/) {
2099         my ($name, $cidr) = ($1, $2);
2100         $cidr =~ s|/32$||;
2101         pve_verify_ipv4_or_cidr($cidr);
2102         my $data = {
2103             name => $name,
2104             cidr => $cidr,
2105         };
2106         $data->{comment} = $comment  if $comment;
2107         return $data;
2108     }
2109
2110     return undef;
2111 }
2112
2113 sub generic_fw_rules_parser {
2114     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2115
2116     my $section;
2117     my $group;
2118
2119     my $res = $empty_conf;
2120
2121     while (defined(my $line = <$fh>)) {
2122         next if $line =~ m/^#/;
2123         next if $line =~ m/^\s*$/;
2124
2125         my $linenr = $fh->input_line_number();
2126         my $prefix = "$filename (line $linenr)";
2127
2128         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2129             $section = 'options';
2130             next;
2131         }
2132
2133         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2134             $section = 'aliases';
2135             next;
2136         }
2137
2138         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2139             $section = 'groups';
2140             $group = lc($1);
2141             my $comment = $2;
2142             $res->{$section}->{$group} = [];
2143             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2144                 if $comment;
2145             next;
2146         }
2147
2148         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2149             $section = 'rules';
2150             next;
2151         }
2152
2153         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2154             $section = 'ipset';
2155             $group = lc($1);
2156             my $comment = $2;
2157             $res->{$section}->{$group} = [];
2158             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2159                 if $comment;
2160             next;
2161         }
2162
2163         if (!$section) {
2164             warn "$prefix: skip line - no section\n";
2165             next;
2166         }
2167
2168         if ($section eq 'options') {
2169             eval {
2170                 my ($opt, $value);
2171                 if ($rule_env eq 'cluster') {
2172                     ($opt, $value) = parse_clusterfw_option($line);
2173                 } elsif ($rule_env eq 'host') {
2174                     ($opt, $value) = parse_hostfw_option($line);
2175                 } else {
2176                     ($opt, $value) = parse_vmfw_option($line);
2177                 }
2178                 $res->{options}->{$opt} = $value;
2179             };
2180             warn "$prefix: $@" if $@;
2181         } elsif ($section eq 'aliases') {
2182             eval {
2183                 my $data = parse_alias($line);
2184                 $res->{aliases}->{lc($data->{name})} = $data;
2185             };
2186             warn "$prefix: $@" if $@;
2187         } elsif ($section eq 'rules') {
2188             my $rule;
2189             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2190             if (my $err = $@) {
2191                 warn "$prefix: $err";
2192                 next;
2193             }
2194             push @{$res->{$section}}, $rule;
2195         } elsif ($section eq 'groups') {
2196             my $rule;
2197             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2198             if (my $err = $@) {
2199                 warn "$prefix: $err";
2200                 next;
2201             }
2202             push @{$res->{$section}->{$group}}, $rule;
2203         } elsif ($section eq 'ipset') {
2204             # we can add single line comments to the end of the rule
2205             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2206
2207             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2208             my $nomatch = $1;
2209             my $cidr = $2;
2210
2211             if($cidr !~ m/^${ip_alias_pattern}$/) {
2212                 $cidr =~ s|/32$||;
2213
2214                 eval { pve_verify_ipv4_or_cidr($cidr); };
2215                 if (my $err = $@) {
2216                     warn "$prefix: $cidr - $err";
2217                     next;
2218                 }
2219             }
2220
2221             my $entry = { cidr => $cidr };
2222             $entry->{nomatch} = 1 if $nomatch;
2223             $entry->{comment} = $comment if $comment;
2224
2225             push @{$res->{$section}->{$group}}, $entry;
2226         } else {
2227             warn "$prefix: skip line - unknown section\n";
2228             next;
2229         }
2230     }
2231
2232     return $res;
2233 }
2234
2235 sub parse_host_fw_rules {
2236     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2237
2238     my $empty_conf = { rules => [], options => {}};
2239
2240     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2241 }
2242
2243 sub parse_vm_fw_rules {
2244     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2245
2246     my $empty_conf = {
2247         rules => [],
2248         options => {},
2249         aliases => {},
2250         ipset => {} ,
2251         ipset_comments => {},
2252     };
2253
2254     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2255 }
2256
2257 sub parse_cluster_fw_rules {
2258     my ($filename, $fh, $verbose) = @_;
2259
2260     my $section;
2261     my $group;
2262
2263     my $empty_conf = {
2264         rules => [],
2265         options => {},
2266         aliases => {},
2267         groups => {},
2268         group_comments => {},
2269         ipset => {} ,
2270         ipset_comments => {},
2271     };
2272
2273     return generic_fw_rules_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2274 }
2275
2276 sub run_locked {
2277     my ($code, @param) = @_;
2278
2279     my $timeout = 10;
2280
2281     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2282
2283     die $@ if $@;
2284
2285     return $res;
2286 }
2287
2288 sub read_local_vm_config {
2289
2290     my $openvz = {};
2291     my $qemu = {};
2292
2293     my $vmdata = { openvz => $openvz, qemu => $qemu };
2294
2295     my $vmlist = PVE::Cluster::get_vmlist();
2296     return $vmdata if !$vmlist || !$vmlist->{ids};
2297     my $ids = $vmlist->{ids};
2298
2299     foreach my $vmid (keys %$ids) {
2300         next if !$vmid; # skip VE0
2301         my $d = $ids->{$vmid};
2302         next if !$d->{node} || $d->{node} ne $nodename;
2303         next if !$d->{type};
2304         if ($d->{type} eq 'openvz') {
2305             if ($have_pve_manager) {
2306                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2307                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2308                     $openvz->{$vmid} = $conf;
2309                 }
2310             }
2311         } elsif ($d->{type} eq 'qemu') {
2312             if ($have_qemu_server) {
2313                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2314                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2315                     $qemu->{$vmid} = $conf;
2316                 }
2317             }
2318         }
2319     }
2320
2321     return $vmdata;
2322 };
2323
2324 sub load_vmfw_conf {
2325     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2326
2327     my $vmfw_conf = {};
2328
2329     $dir = "/etc/pve/firewall" if !defined($dir);
2330
2331     my $filename = "$dir/$vmid.fw";
2332     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2333         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
2334         $vmfw_conf->{vmid} = $vmid;
2335     }
2336
2337     return $vmfw_conf;
2338 }
2339
2340 my $format_rules = sub {
2341     my ($rules, $allow_iface) = @_;
2342
2343     my $raw = '';
2344
2345     foreach my $rule (@$rules) {
2346         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2347             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2348             $raw .= uc($rule->{type});
2349             if ($rule->{macro}) {
2350                 $raw .= " $rule->{macro}($rule->{action})";
2351             } else {
2352                 $raw .= " " . $rule->{action};
2353             }
2354             if ($allow_iface && $rule->{iface}) {
2355                 $raw .= " -i $rule->{iface}";
2356             }
2357
2358             if ($rule->{type} ne  'group')  {
2359                 $raw .= " -source $rule->{source}" if $rule->{source};
2360                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2361                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2362                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2363                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2364             }
2365
2366             $raw .= " # " . encode('utf8', $rule->{comment})
2367                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2368             $raw .= "\n";
2369         } else {
2370             die "unknown rule type '$rule->{type}'";
2371         }
2372     }
2373
2374     return $raw;
2375 };
2376
2377 my $format_options = sub {
2378     my ($options) = @_;
2379
2380     my $raw = '';
2381
2382     $raw .= "[OPTIONS]\n\n";
2383     foreach my $opt (keys %$options) {
2384         $raw .= "$opt: $options->{$opt}\n";
2385     }
2386     $raw .= "\n";
2387
2388     return $raw;
2389 };
2390
2391 my $format_aliases = sub {
2392     my ($aliases) = @_;
2393
2394     my $raw = '';
2395
2396     $raw .= "[ALIASES]\n\n";
2397     foreach my $k (keys %$aliases) {
2398         my $e = $aliases->{$k};
2399         $raw .= "$e->{name} $e->{cidr}";
2400         $raw .= " # " . encode('utf8', $e->{comment})
2401             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2402         $raw .= "\n";
2403     }
2404     $raw .= "\n";
2405
2406     return $raw;
2407 };
2408
2409 my $format_ipsets = sub {
2410     my ($fw_conf) = @_;
2411
2412     my $raw = '';
2413
2414     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2415         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2416             my $utf8comment = encode('utf8', $comment);
2417             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2418         } else {
2419             $raw .= "[IPSET $ipset]\n\n";
2420         }
2421         my $options = $fw_conf->{ipset}->{$ipset};
2422
2423         my $nethash = {};
2424         foreach my $entry (@$options) {
2425             $nethash->{$entry->{cidr}} = $entry;
2426         }
2427
2428         foreach my $cidr (sort keys %$nethash) {
2429             my $entry = $nethash->{$cidr};
2430             my $line = $entry->{nomatch} ? '!' : '';
2431             $line .= $entry->{cidr};
2432             $line .= " # " . encode('utf8', $entry->{comment})
2433                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2434             $raw .= "$line\n";
2435         }
2436
2437         $raw .= "\n";
2438     }
2439
2440     return $raw;
2441 };
2442
2443 sub save_vmfw_conf {
2444     my ($vmid, $vmfw_conf) = @_;
2445
2446     my $raw = '';
2447
2448     my $options = $vmfw_conf->{options};
2449     $raw .= &$format_options($options) if scalar(keys %$options);
2450
2451     my $aliases = $vmfw_conf->{aliases};
2452     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2453
2454     $raw .= &$format_ipsets($vmfw_conf);
2455
2456     my $rules = $vmfw_conf->{rules} || [];
2457     if (scalar(@$rules)) {
2458         $raw .= "[RULES]\n\n";
2459         $raw .= &$format_rules($rules, 1);
2460         $raw .= "\n";
2461     }
2462
2463     my $filename = "/etc/pve/firewall/$vmid.fw";
2464     PVE::Tools::file_set_contents($filename, $raw);
2465 }
2466
2467 sub read_vm_firewall_configs {
2468     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2469
2470     my $vmfw_configs = {};
2471
2472     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2473         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2474         next if !$vmfw_conf->{options}; # skip if file does not exists
2475         $vmfw_configs->{$vmid} = $vmfw_conf;
2476     }
2477     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2478         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2479         next if !$vmfw_conf->{options}; # skip if file does not exists
2480         $vmfw_configs->{$vmid} = $vmfw_conf;
2481     }
2482
2483     return $vmfw_configs;
2484 }
2485
2486 sub get_option_log_level {
2487     my ($options, $k) = @_;
2488
2489     my $v = $options->{$k};
2490     $v = $default_log_level if !defined($v);
2491
2492     return undef if $v eq '' || $v eq 'nolog';
2493
2494     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2495
2496     return $v if ($v >= 0) && ($v <= 7);
2497
2498     warn "unknown log level ($k = '$v')\n";
2499
2500     return undef;
2501 }
2502
2503 sub generate_std_chains {
2504     my ($ruleset, $options) = @_;
2505
2506     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2507
2508     # same as shorewall smurflog.
2509     my $chain = 'PVEFW-smurflog';
2510     $pve_std_chains->{$chain} = [];
2511
2512     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2513     push @{$pve_std_chains->{$chain}}, "-j DROP";
2514
2515     # same as shorewall logflags action.
2516     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2517     $chain = 'PVEFW-logflags';
2518     $pve_std_chains->{$chain} = [];
2519
2520     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2521     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2522     push @{$pve_std_chains->{$chain}}, "-j DROP";
2523
2524     foreach my $chain (keys %$pve_std_chains) {
2525         ruleset_create_chain($ruleset, $chain);
2526         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2527             if (ref($rule)) {
2528                 ruleset_generate_rule($ruleset, $chain, $rule);
2529             } else {
2530                 ruleset_addrule($ruleset, $chain, $rule);
2531             }
2532         }
2533     }
2534 }
2535
2536 sub generate_ipset_chains {
2537     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2538
2539     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2540         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2541         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2542     }
2543 }
2544
2545 sub generate_ipset {
2546     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2547
2548     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2549
2550     my $hashsize = scalar(@$options);
2551     if ($hashsize <= 64) {
2552         $hashsize = 64;
2553     } else {
2554         $hashsize = round_powerof2($hashsize);
2555     }
2556
2557     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2558
2559     # remove duplicates
2560     my $nethash = {};
2561     foreach my $entry (@$options) {
2562         my $cidr = $entry->{cidr};
2563         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2564             my $alias = lc($cidr);
2565             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2566             $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2567             if ($e) {
2568                 $entry->{cidr} = $e->{cidr};
2569                 $nethash->{$entry->{cidr}} = $entry;
2570             } else {
2571                 warn "no such alias '$cidr'\n";
2572             }
2573         } else {
2574             $nethash->{$entry->{cidr}} = $entry;
2575         }
2576     }
2577
2578     foreach my $cidr (sort keys %$nethash) {
2579         my $entry = $nethash->{$cidr};
2580
2581         my $cmd = "add $name $cidr";
2582         if ($entry->{nomatch}) {
2583             if ($feature_ipset_nomatch) {
2584                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2585             } else {
2586                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2587             }
2588         } else {
2589             push @{$ipset_ruleset->{$name}}, $cmd;
2590         }
2591     }
2592 }
2593
2594 sub round_powerof2 {
2595     my ($int) = @_;
2596
2597     $int--;
2598     $int |= $int >> $_ foreach (1,2,4,8,16);
2599     return ++$int;
2600 }
2601
2602 sub load_clusterfw_conf {
2603     my ($filename, $verbose) = @_;
2604
2605     $filename = $clusterfw_conf_filename if !defined($filename);
2606
2607     my $cluster_conf = {};
2608     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2609         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2610     }
2611
2612     return $cluster_conf;
2613 }
2614
2615 sub save_clusterfw_conf {
2616     my ($cluster_conf) = @_;
2617
2618     my $raw = '';
2619
2620     my $options = $cluster_conf->{options};
2621     $raw .= &$format_options($options) if scalar(keys %$options);
2622
2623     my $aliases = $cluster_conf->{aliases};
2624     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2625
2626     $raw .= &$format_ipsets($cluster_conf);
2627
2628     my $rules = $cluster_conf->{rules};
2629     if (scalar(@$rules)) {
2630         $raw .= "[RULES]\n\n";
2631         $raw .= &$format_rules($rules, 1);
2632         $raw .= "\n";
2633     }
2634
2635     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2636         my $rules = $cluster_conf->{groups}->{$group};
2637         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2638             my $utf8comment = encode('utf8', $comment);
2639             $raw .= "[group $group] # $utf8comment\n\n";
2640         } else {
2641             $raw .= "[group $group]\n\n";
2642         }
2643
2644         $raw .= &$format_rules($rules, 0);
2645         $raw .= "\n";
2646     }
2647
2648     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2649 }
2650
2651 sub load_hostfw_conf {
2652     my ($cluster_conf, $filename, $verbose) = @_;
2653
2654     $filename = $hostfw_conf_filename if !defined($filename);
2655
2656     my $hostfw_conf = {};
2657     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2658         $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
2659     }
2660     return $hostfw_conf;
2661 }
2662
2663 sub save_hostfw_conf {
2664     my ($hostfw_conf) = @_;
2665
2666     my $raw = '';
2667
2668     my $options = $hostfw_conf->{options};
2669     $raw .= &$format_options($options) if scalar(keys %$options);
2670
2671     my $rules = $hostfw_conf->{rules};
2672     if (scalar(@$rules)) {
2673         $raw .= "[RULES]\n\n";
2674         $raw .= &$format_rules($rules, 1);
2675         $raw .= "\n";
2676     }
2677
2678     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2679 }
2680
2681 sub compile {
2682     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2683
2684     my $vmfw_configs;
2685
2686     if ($vmdata) { # test mode
2687         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2688         my $filename = "$testdir/cluster.fw";
2689         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2690
2691         $filename = "$testdir/host.fw";
2692         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2693
2694         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2695     } else { # normal operation
2696         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2697
2698         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2699
2700         $vmdata = read_local_vm_config();
2701         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2702     }
2703
2704     $cluster_conf->{ipset}->{venet0} = [];
2705     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2706
2707     my $localnet;
2708     if ($cluster_conf->{aliases}->{local_network}) {
2709         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2710     } else {
2711         $localnet = local_network() || '127.0.0.0/8';
2712         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2713     }
2714
2715     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2716
2717     my $ruleset = {};
2718
2719     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2720     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2721
2722     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2723
2724     my $hostfw_options = $hostfw_conf->{options} || {};
2725
2726     # fixme: what log level should we use here?
2727     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2728
2729     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2730
2731
2732     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2733     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2734     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2735
2736     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2737     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2738
2739     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2740
2741     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2742     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2743
2744     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2745     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2746
2747     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2748
2749     generate_std_chains($ruleset, $hostfw_options);
2750
2751     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2752
2753     my $ipset_ruleset = {};
2754
2755     if ($hostfw_enable) {
2756         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2757         warn $@ if $@; # just to be sure - should not happen
2758     }
2759
2760     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2761
2762     # generate firewall rules for QEMU VMs
2763     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2764         eval {
2765             my $conf = $vmdata->{qemu}->{$vmid};
2766             my $vmfw_conf = $vmfw_configs->{$vmid};
2767             return if !$vmfw_conf;
2768             return if !$vmfw_conf->{options}->{enable};
2769
2770             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2771
2772             foreach my $netid (keys %$conf) {
2773                 next if $netid !~ m/^net(\d+)$/;
2774                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2775                 next if !$net->{firewall};
2776                 my $iface = "tap${vmid}i$1";
2777
2778                 my $macaddr = $net->{macaddr};
2779                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2780                                              $vmfw_conf, $vmid, 'IN');
2781                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2782                                              $vmfw_conf, $vmid, 'OUT');
2783             }
2784         };
2785         warn $@ if $@; # just to be sure - should not happen
2786     }
2787
2788     # generate firewall rules for OpenVZ containers
2789     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2790         eval {
2791             my $conf = $vmdata->{openvz}->{$vmid};
2792
2793             my $vmfw_conf = $vmfw_configs->{$vmid};
2794             return if !$vmfw_conf;
2795             return if !$vmfw_conf->{options}->{enable};
2796
2797             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2798
2799             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2800                 my $ip = $conf->{ip_address}->{value};
2801                 $ip =~ s/\s+/,/g;
2802                 parse_address_list($ip); # make sure we have a valid $ip list
2803
2804                 my @ips = split(',', $ip);
2805
2806                 foreach my $singleip (@ips) {
2807                     my $venet0ipset = {};
2808                     $venet0ipset->{cidr} = $singleip;
2809                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2810                 }
2811
2812                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2813                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2814             }
2815
2816             if ($conf->{netif} && $conf->{netif}->{value}) {
2817                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2818                 foreach my $netid (keys %$netif) {
2819                     my $d = $netif->{$netid};
2820
2821                     my $macaddr = $d->{mac};
2822                     my $iface = $d->{host_ifname};
2823                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2824                                                  $vmfw_conf, $vmid, 'IN');
2825                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2826                                                  $vmfw_conf, $vmid, 'OUT');
2827                 }
2828             }
2829         };
2830         warn $@ if $@; # just to be sure - should not happen
2831     }
2832
2833     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2834         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2835     }
2836
2837     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2838
2839     return ($ruleset, $ipset_ruleset);
2840 }
2841
2842 sub get_ruleset_status {
2843     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2844
2845     my $statushash = {};
2846
2847     foreach my $chain (sort keys %$ruleset) {
2848         my $sig = &$digest_fn($ruleset->{$chain});
2849
2850         $statushash->{$chain}->{sig} = $sig;
2851
2852         my $oldsig = $active_chains->{$chain};
2853         if (!defined($oldsig)) {
2854             $statushash->{$chain}->{action} = 'create';
2855         } else {
2856             if ($oldsig eq $sig) {
2857                 $statushash->{$chain}->{action} = 'exists';
2858             } else {
2859                 $statushash->{$chain}->{action} = 'update';
2860             }
2861         }
2862         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2863         foreach my $cmd (@{$ruleset->{$chain}}) {
2864             print "\t$cmd\n" if $verbose;
2865         }
2866     }
2867
2868     foreach my $chain (sort keys %$active_chains) {
2869         if (!defined($ruleset->{$chain})) {
2870             my $sig = $active_chains->{$chain};
2871             $statushash->{$chain}->{action} = 'delete';
2872             $statushash->{$chain}->{sig} = $sig;
2873             print "delete $chain ($sig)\n" if $verbose;
2874         }
2875     }
2876
2877     return $statushash;
2878 }
2879
2880 sub print_sig_rule {
2881     my ($chain, $sig) = @_;
2882
2883     # We just use this to store a SHA1 checksum used to detect changes
2884     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2885 }
2886
2887 sub get_ruleset_cmdlist {
2888     my ($ruleset, $verbose) = @_;
2889
2890     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2891
2892     my ($active_chains, $hooks) = iptables_get_chains();
2893     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2894
2895     # create missing chains first
2896     foreach my $chain (sort keys %$ruleset) {
2897         my $stat = $statushash->{$chain};
2898         die "internal error" if !$stat;
2899         next if $stat->{action} ne 'create';
2900
2901         $cmdlist .= ":$chain - [0:0]\n";
2902     }
2903
2904     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2905         if (!$hooks->{$h}) {
2906             $cmdlist .= "-A $h -j PVEFW-$h\n";
2907         }
2908     }
2909
2910     foreach my $chain (sort keys %$ruleset) {
2911         my $stat = $statushash->{$chain};
2912         die "internal error" if !$stat;
2913
2914         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2915             $cmdlist .= "-F $chain\n";
2916             foreach my $cmd (@{$ruleset->{$chain}}) {
2917                 $cmdlist .= "$cmd\n";
2918             }
2919             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2920         } elsif ($stat->{action} eq 'delete') {
2921             die "internal error"; # this should not happen
2922         } elsif ($stat->{action} eq 'exists') {
2923             # do nothing
2924         } else {
2925             die "internal error - unknown status '$stat->{action}'";
2926         }
2927     }
2928
2929     foreach my $chain (keys %$statushash) {
2930         next if $statushash->{$chain}->{action} ne 'delete';
2931         $cmdlist .= "-F $chain\n";
2932     }
2933     foreach my $chain (keys %$statushash) {
2934         next if $statushash->{$chain}->{action} ne 'delete';
2935         next if $chain eq 'PVEFW-INPUT';
2936         next if $chain eq 'PVEFW-OUTPUT';
2937         next if $chain eq 'PVEFW-FORWARD';
2938         $cmdlist .= "-X $chain\n";
2939     }
2940
2941     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2942
2943     $cmdlist .= "COMMIT\n";
2944
2945     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2946 }
2947
2948 sub get_ipset_cmdlist {
2949     my ($ruleset, $verbose) = @_;
2950
2951     my $cmdlist = "";
2952
2953     my $delete_cmdlist = "";
2954
2955     my $active_chains = ipset_get_chains();
2956     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2957
2958     # remove stale _swap chains
2959     foreach my $chain (keys %$active_chains) {
2960         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2961             $cmdlist .= "destroy $chain\n";
2962         }
2963     }
2964
2965     foreach my $chain (sort keys %$ruleset) {
2966         my $stat = $statushash->{$chain};
2967         die "internal error" if !$stat;
2968
2969         if ($stat->{action} eq 'create') {
2970             foreach my $cmd (@{$ruleset->{$chain}}) {
2971                 $cmdlist .= "$cmd\n";
2972             }
2973         }
2974
2975         if ($stat->{action} eq 'update') {
2976             my $chain_swap = $chain."_swap";
2977
2978             foreach my $cmd (@{$ruleset->{$chain}}) {
2979                 $cmd =~ s/$chain/$chain_swap/;
2980                 $cmdlist .= "$cmd\n";
2981             }
2982             $cmdlist .= "swap $chain_swap $chain\n";
2983             $cmdlist .= "flush $chain_swap\n";
2984             $cmdlist .= "destroy $chain_swap\n";
2985         }
2986
2987     }
2988
2989     foreach my $chain (keys %$statushash) {
2990         next if $statushash->{$chain}->{action} ne 'delete';
2991
2992         $delete_cmdlist .= "flush $chain\n";
2993         $delete_cmdlist .= "destroy $chain\n";
2994     }
2995
2996     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2997
2998     return ($cmdlist, $delete_cmdlist, $changes);
2999 }
3000
3001 sub apply_ruleset {
3002     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3003
3004     enable_bridge_firewall();
3005
3006     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3007         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3008
3009     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3010
3011     if ($verbose) {
3012         if ($ipset_changes) {
3013             print "ipset changes:\n";
3014             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3015             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3016         }
3017
3018         if ($changes) {
3019             print "iptables changes:\n";
3020             print $cmdlist;
3021         }
3022     }
3023
3024     ipset_restore_cmdlist($ipset_create_cmdlist);
3025
3026     iptables_restore_cmdlist($cmdlist);
3027
3028     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3029
3030     # test: re-read status and check if everything is up to date
3031     my $active_chains = iptables_get_chains();
3032     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3033
3034     my $errors;
3035     foreach my $chain (sort keys %$ruleset) {
3036         my $stat = $statushash->{$chain};
3037         if ($stat->{action} ne 'exists') {
3038             warn "unable to update chain '$chain'\n";
3039             $errors = 1;
3040         }
3041     }
3042
3043     die "unable to apply firewall changes\n" if $errors;
3044
3045     update_nf_conntrack_max($hostfw_conf);
3046
3047     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3048
3049 }
3050
3051 sub update_nf_conntrack_max {
3052     my ($hostfw_conf) = @_;
3053
3054     my $max = 65536; # reasonable default
3055
3056     my $options = $hostfw_conf->{options} || {};
3057
3058     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3059         $max = $options->{nf_conntrack_max};
3060         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3061     }
3062
3063     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3064     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3065
3066     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3067
3068     if ($current != $max) {
3069         my $hashsize = int($max/4);
3070         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3071         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3072     }
3073 }
3074
3075 sub update_nf_conntrack_tcp_timeout_established {
3076     my ($hostfw_conf) = @_;
3077
3078     my $options = $hostfw_conf->{options} || {};
3079
3080     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3081
3082     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3083 }
3084
3085 sub remove_pvefw_chains {
3086
3087     my ($chash, $hooks) = iptables_get_chains();
3088     my $cmdlist = "*filter\n";
3089
3090     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3091         if ($hooks->{$h}) {
3092             $cmdlist .= "-D $h -j PVEFW-$h\n";
3093         }
3094     }
3095
3096     foreach my $chain (keys %$chash) {
3097         $cmdlist .= "-F $chain\n";
3098     }
3099
3100     foreach my $chain (keys %$chash) {
3101         $cmdlist .= "-X $chain\n";
3102     }
3103     $cmdlist .= "COMMIT\n";
3104
3105     iptables_restore_cmdlist($cmdlist);
3106 }
3107
3108 sub init {
3109     my $cluster_conf = load_clusterfw_conf();
3110     my $cluster_options = $cluster_conf->{options};
3111     my $enable = $cluster_options->{enable};
3112
3113     return if !$enable;
3114
3115     # load required modules here
3116 }
3117
3118 sub update {
3119     my $code = sub {
3120
3121         my $cluster_conf = load_clusterfw_conf();
3122         my $cluster_options = $cluster_conf->{options};
3123
3124         my $enable = $cluster_options->{enable};
3125
3126         die "Firewall is disabled - cannot start\n" if !$enable;
3127
3128         if (!$enable) {
3129             PVE::Firewall::remove_pvefw_chains();
3130             return;
3131         }
3132
3133         my $hostfw_conf = load_hostfw_conf();
3134
3135         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3136
3137         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3138     };
3139
3140     run_locked($code);
3141 }
3142
3143 1;