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 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  39 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  40 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41
  42 my $max_alias_name_length = 64;
  43 my $max_ipset_name_length = 64;
  44 my $max_group_name_length = 20;
  45
  46 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  47 sub pve_verify_ipv4_or_cidr {
  48     my ($cidr, $noerr) = @_;
  49
  50     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  51         return $cidr if Net::IP->new($cidr);
  52         return undef if $noerr;
  53         die Net::IP::Error() . "\n";
  54     }
  55     return undef if $noerr;
  56     die "value does not look like a valid IP address or CIDR network\n";
  57 }
  58
  59 PVE::JSONSchema::register_standard_option('ipset-name', {
  60     description => "IP set name.",
  61     type => 'string',
  62     pattern => $ipset_name_pattern,
  63     minLength => 2,
  64     maxLength => $max_ipset_name_length,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  68     description => "Alias name.",
  69     type => 'string',
  70     pattern => $ip_alias_pattern,
  71     minLength => 2,
  72     maxLength => $max_alias_name_length,
  73 });
  74
  75 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  76     description => "Log level.",
  77     type => 'string',
  78     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  79     optional => 1,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  83     description => "Security Group name.",
  84     type => 'string',
  85     pattern => $security_group_name_pattern,
  86     minLength => 2,
  87     maxLength => $max_group_name_length,
  88 });
  89
  90 my $feature_ipset_nomatch = 0;
  91 eval  {
  92     my (undef, undef, $release) = POSIX::uname();
  93     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  94         my ($major, $minor) = ($1, $2);
  95         $feature_ipset_nomatch = 1 if ($major > 3) ||
  96             ($major == 3 && $minor >= 7);
  97     }
  98
  99 };
 100
 101 use Data::Dumper;
 102
 103 my $nodename = PVE::INotify::nodename();
 104
 105 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 106
 107 my $default_log_level = 'nolog'; # avoid logs by default
 108
 109 my $log_level_hash = {
 110     debug => 7,
 111     info => 6,
 112     notice => 5,
 113     warning => 4,
 114     err => 3,
 115     crit => 2,
 116     alert => 1,
 117     emerg => 0,
 118 };
 119
 120 # imported/converted from: /usr/share/shorewall/macro.*
 121 my $pve_fw_macros = {
 122     'Amanda' => [
 123         "Amanda Backup",
 124         { action => 'PARAM', proto => 'udp', dport => '10080' },
 125         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 126     ],
 127     'Auth' => [
 128         "Auth (identd) traffic",
 129         { action => 'PARAM', proto => 'tcp', dport => '113' },
 130     ],
 131     'BGP' => [
 132         "Border Gateway Protocol traffic",
 133         { action => 'PARAM', proto => 'tcp', dport => '179' },
 134     ],
 135     'BitTorrent' => [
 136         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'BitTorrent32' => [
 141         "BitTorrent traffic for BitTorrent 3.2 and later",
 142         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 143         { action => 'PARAM', proto => 'udp', dport => '6881' },
 144     ],
 145     'CVS' => [
 146         "Concurrent Versions System pserver traffic",
 147         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 148     ],
 149     'Citrix' => [
 150         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 151         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 152         { action => 'PARAM', proto => 'udp', dport => '1604' },
 153         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 154     ],
 155     'DAAP' => [
 156         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 157         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 158         { action => 'PARAM', proto => 'udp', dport => '3689' },
 159     ],
 160     'DCC' => [
 161         "Distributed Checksum Clearinghouse spam filtering mechanism",
 162         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 163     ],
 164     'DHCPfwd' => [
 165         "Forwarded DHCP traffic",
 166         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 167     ],
 168     'DNS' => [
 169         "Domain Name System traffic (upd and tcp)",
 170         { action => 'PARAM', proto => 'udp', dport => '53' },
 171         { action => 'PARAM', proto => 'tcp', dport => '53' },
 172     ],
 173     'Distcc' => [
 174         "Distributed Compiler service",
 175         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 176     ],
 177     'FTP' => [
 178         "File Transfer Protocol",
 179         { action => 'PARAM', proto => 'tcp', dport => '21' },
 180     ],
 181     'Finger' => [
 182         "Finger protocol (RFC 742)",
 183         { action => 'PARAM', proto => 'tcp', dport => '79' },
 184     ],
 185     'GNUnet' => [
 186         "GNUnet secure peer-to-peer networking traffic",
 187         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 188         { action => 'PARAM', proto => 'udp', dport => '2086' },
 189         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 190         { action => 'PARAM', proto => 'udp', dport => '1080' },
 191     ],
 192     'GRE' => [
 193         "Generic Routing Encapsulation tunneling protocol",
 194         { action => 'PARAM', proto => '47' },
 195     ],
 196     'Git' => [
 197         "Git distributed revision control traffic",
 198         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 199     ],
 200     'HKP' => [
 201         "OpenPGP HTTP keyserver protocol traffic",
 202         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 203     ],
 204     'HTTP' => [
 205         "Hypertext Transfer Protocol (WWW)",
 206         { action => 'PARAM', proto => 'tcp', dport => '80' },
 207     ],
 208     'HTTPS' => [
 209         "Hypertext Transfer Protocol (WWW) over SSL",
 210         { action => 'PARAM', proto => 'tcp', dport => '443' },
 211     ],
 212     'ICPV2' => [
 213         "Internet Cache Protocol V2 (Squid) traffic",
 214         { action => 'PARAM', proto => 'udp', dport => '3130' },
 215     ],
 216     'ICQ' => [
 217         "AOL Instant Messenger traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 219     ],
 220     'IMAP' => [
 221         "Internet Message Access Protocol",
 222         { action => 'PARAM', proto => 'tcp', dport => '143' },
 223     ],
 224     'IMAPS' => [
 225         "Internet Message Access Protocol over SSL",
 226         { action => 'PARAM', proto => 'tcp', dport => '993' },
 227     ],
 228     'IPIP' => [
 229         "IPIP capsulation traffic",
 230         { action => 'PARAM', proto => '94' },
 231     ],
 232     'IPsec' => [
 233         "IPsec traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '50' },
 236     ],
 237     'IPsecah' => [
 238         "IPsec authentication (AH) traffic",
 239         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 240         { action => 'PARAM', proto => '51' },
 241     ],
 242     'IPsecnat' => [
 243         "IPsec traffic and Nat-Traversal",
 244         { action => 'PARAM', proto => 'udp', dport => '500' },
 245         { action => 'PARAM', proto => 'udp', dport => '4500' },
 246         { action => 'PARAM', proto => '50' },
 247     ],
 248     'IRC' => [
 249         "Internet Relay Chat traffic",
 250         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 251     ],
 252     'Jetdirect' => [
 253         "HP Jetdirect printing",
 254         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 255     ],
 256     'L2TP' => [
 257         "Layer 2 Tunneling Protocol traffic",
 258         { action => 'PARAM', proto => 'udp', dport => '1701' },
 259     ],
 260     'LDAP' => [
 261         "Lightweight Directory Access Protocol traffic",
 262         { action => 'PARAM', proto => 'tcp', dport => '389' },
 263     ],
 264     'LDAPS' => [
 265         "Secure Lightweight Directory Access Protocol traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '636' },
 267     ],
 268     'MSNP' => [
 269         "Microsoft Notification Protocol",
 270         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 271     ],
 272     'MSSQL' => [
 273         "Microsoft SQL Server",
 274         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 275     ],
 276     'Mail' => [
 277         "Mail traffic (SMTP, SMTPS, Submission)",
 278         { action => 'PARAM', proto => 'tcp', dport => '25' },
 279         { action => 'PARAM', proto => 'tcp', dport => '465' },
 280         { action => 'PARAM', proto => 'tcp', dport => '587' },
 281     ],
 282     'Munin' => [
 283         "Munin networked resource monitoring traffic",
 284         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 285     ],
 286     'MySQL' => [
 287         "MySQL server",
 288         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 289     ],
 290     'NNTP' => [
 291         "NNTP traffic (Usenet).",
 292         { action => 'PARAM', proto => 'tcp', dport => '119' },
 293     ],
 294     'NNTPS' => [
 295         "Encrypted NNTP traffic (Usenet)",
 296         { action => 'PARAM', proto => 'tcp', dport => '563' },
 297     ],
 298     'NTP' => [
 299         "Network Time Protocol (ntpd)",
 300         { action => 'PARAM', proto => 'udp', dport => '123' },
 301     ],
 302     'OSPF' => [
 303         "OSPF multicast traffic",
 304         { action => 'PARAM', proto => '89' },
 305     ],
 306     'OpenVPN' => [
 307         "OpenVPN traffic",
 308         { action => 'PARAM', proto => 'udp', dport => '1194' },
 309     ],
 310     'PCA' => [
 311         "Symantec PCAnywere (tm)",
 312         { action => 'PARAM', proto => 'udp', dport => '5632' },
 313         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 314     ],
 315     'POP3' => [
 316         "POP3 traffic",
 317         { action => 'PARAM', proto => 'tcp', dport => '110' },
 318     ],
 319     'POP3S' => [
 320         "Encrypted POP3 traffic",
 321         { action => 'PARAM', proto => 'tcp', dport => '995' },
 322     ],
 323     'PPtP' => [
 324         "Point-to-Point Tunneling Protocol",
 325         { action => 'PARAM', proto => '47' },
 326         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 327     ],
 328     'Ping' => [
 329         "ICMP echo request",
 330         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 331     ],
 332     'PostgreSQL' => [
 333         "PostgreSQL server",
 334         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 335     ],
 336     'Printer' => [
 337         "Line Printer protocol printing",
 338         { action => 'PARAM', proto => 'tcp', dport => '515' },
 339     ],
 340     'RDP' => [
 341         "Microsoft Remote Desktop Protocol traffic",
 342         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 343     ],
 344     'RIP' => [
 345         "Routing Information Protocol (bidirectional)",
 346         { action => 'PARAM', proto => 'udp', dport => '520' },
 347     ],
 348     'RNDC' => [
 349         "BIND remote management protocol",
 350         { action => 'PARAM', proto => 'tcp', dport => '953' },
 351     ],
 352     'Razor' => [
 353         "Razor Antispam System",
 354         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 355     ],
 356     'Rdate' => [
 357         "Remote time retrieval (rdate)",
 358         { action => 'PARAM', proto => 'tcp', dport => '37' },
 359     ],
 360     'Rsync' => [
 361         "Rsync server",
 362         { action => 'PARAM', proto => 'tcp', dport => '873' },
 363     ],
 364     'SANE' => [
 365         "SANE network scanning",
 366         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 367     ],
 368     'SMB' => [
 369         "Microsoft SMB traffic",
 370         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 371         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 372         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 373         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 374     ],
 375     'SMBswat' => [
 376         "Samba Web Administration Tool",
 377         { action => 'PARAM', proto => 'tcp', dport => '901' },
 378     ],
 379     'SMTP' => [
 380         "Simple Mail Transfer Protocol",
 381         { action => 'PARAM', proto => 'tcp', dport => '25' },
 382     ],
 383     'SMTPS' => [
 384         "Encrypted Simple Mail Transfer Protocol",
 385         { action => 'PARAM', proto => 'tcp', dport => '465' },
 386     ],
 387     'SNMP' => [
 388         "Simple Network Management Protocol",
 389         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 390         { action => 'PARAM', proto => 'tcp', dport => '161' },
 391     ],
 392     'SPAMD' => [
 393         "Spam Assassin SPAMD traffic",
 394         { action => 'PARAM', proto => 'tcp', dport => '783' },
 395     ],
 396     'SSH' => [
 397         "Secure shell traffic",
 398         { action => 'PARAM', proto => 'tcp', dport => '22' },
 399     ],
 400     'SVN' => [
 401         "Subversion server (svnserve)",
 402         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 403     ],
 404     'SixXS' => [
 405         "SixXS IPv6 Deployment and Tunnel Broker",
 406         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 407         { action => 'PARAM', proto => 'udp', dport => '3740' },
 408         { action => 'PARAM', proto => '41' },
 409         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 410     ],
 411     'Squid' => [
 412         "Squid web proxy traffic",
 413         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 414     ],
 415     'Submission' => [
 416         "Mail message submission traffic",
 417         { action => 'PARAM', proto => 'tcp', dport => '587' },
 418     ],
 419     'Syslog' => [
 420         "Syslog protocol (RFC 5424) traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '514' },
 422         { action => 'PARAM', proto => 'tcp', dport => '514' },
 423     ],
 424     'TFTP' => [
 425         "Trivial File Transfer Protocol traffic",
 426         { action => 'PARAM', proto => 'udp', dport => '69' },
 427     ],
 428     'Telnet' => [
 429         "Telnet traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '23' },
 431     ],
 432     'Telnets' => [
 433         "Telnet over SSL",
 434         { action => 'PARAM', proto => 'tcp', dport => '992' },
 435     ],
 436     'Time' => [
 437         "RFC 868 Time protocol",
 438         { action => 'PARAM', proto => 'tcp', dport => '37' },
 439     ],
 440     'Trcrt' => [
 441         "Traceroute (for up to 30 hops) traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 443         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 444     ],
 445     'VNC' => [
 446         "VNC traffic for VNC display's 0 - 99",
 447         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 448     ],
 449     'VNCL' => [
 450         "VNC traffic from Vncservers to Vncviewers in listen mode",
 451         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 452     ],
 453     'Web' => [
 454         "WWW traffic (HTTP and HTTPS)",
 455         { action => 'PARAM', proto => 'tcp', dport => '80' },
 456         { action => 'PARAM', proto => 'tcp', dport => '443' },
 457     ],
 458     'Webcache' => [
 459         "Web Cache/Proxy traffic (port 8080)",
 460         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 461     ],
 462     'Webmin' => [
 463         "Webmin traffic",
 464         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 465     ],
 466     'Whois' => [
 467         "Whois (nicname, RFC 3912) traffic",
 468         { action => 'PARAM', proto => 'tcp', dport => '43' },
 469     ],
 470 };
 471
 472 my $pve_fw_parsed_macros;
 473 my $pve_fw_macro_descr;
 474 my $pve_fw_preferred_macro_names = {};
 475
 476 my $pve_std_chains = {
 477     'PVEFW-SET-ACCEPT-MARK' => [
 478         "-j MARK --set-mark 1",
 479     ],
 480     'PVEFW-DropBroadcast' => [
 481         # same as shorewall 'Broadcast'
 482         # simply DROP BROADCAST/MULTICAST/ANYCAST
 483         # we can use this to reduce logging
 484         { action => 'DROP', dsttype => 'BROADCAST' },
 485         { action => 'DROP', dsttype => 'MULTICAST' },
 486         { action => 'DROP', dsttype => 'ANYCAST' },
 487         { action => 'DROP', dest => '224.0.0.0/4' },
 488     ],
 489     'PVEFW-reject' => [
 490         # same as shorewall 'reject'
 491         { action => 'DROP', dsttype => 'BROADCAST' },
 492         { action => 'DROP', source => '224.0.0.0/4' },
 493         { action => 'DROP', proto => 'icmp' },
 494         "-p tcp -j REJECT --reject-with tcp-reset",
 495         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 496         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 497         "-j REJECT --reject-with icmp-host-prohibited",
 498     ],
 499     'PVEFW-Drop' => [
 500         # same as shorewall 'Drop', which is equal to DROP,
 501         # but REJECT/DROP some packages to reduce logging,
 502         # and ACCEPT critical ICMP types
 503         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 504         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 505         { action => 'PVEFW-DropBroadcast' },
 506         # ACCEPT critical ICMP types
 507         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 508         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 509         # Drop packets with INVALID state
 510         "-m conntrack --ctstate INVALID -j DROP",
 511         # Drop Microsoft SMB noise
 512         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 513         { action => 'DROP', proto => 'udp', dport => '137:139'},
 514         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 515         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 516         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 517         # Drop new/NotSyn traffic so that it doesn't get logged
 518         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 519         # Drop DNS replies
 520         { action => 'DROP', proto => 'udp', sport => 53 },
 521     ],
 522     'PVEFW-Reject' => [
 523         # same as shorewall 'Reject', which is equal to Reject,
 524         # but REJECT/DROP some packages to reduce logging,
 525         # and ACCEPT critical ICMP types
 526         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 527         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 528         { action => 'PVEFW-DropBroadcast' },
 529         # ACCEPT critical ICMP types
 530         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 531         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 532         # Drop packets with INVALID state
 533         "-m conntrack --ctstate INVALID -j DROP",
 534         # Drop Microsoft SMB noise
 535         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 536         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 537         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 538         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 539         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 540         # Drop new/NotSyn traffic so that it doesn't get logged
 541         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 542         # Drop DNS replies
 543         { action => 'DROP', proto => 'udp', sport => 53 },
 544     ],
 545     'PVEFW-tcpflags' => [
 546         # same as shorewall tcpflags action.
 547         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 548         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 549         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 550         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 551         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 552         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 553     ],
 554     'PVEFW-smurfs' => [
 555         # same as shorewall smurfs action
 556         # Filter packets for smurfs (packets with a broadcast address as the source).
 557         "-s 0.0.0.0/32 -j RETURN",
 558         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 559         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 560     ],
 561 };
 562
 563 # iptables -p icmp -h
 564 my $icmp_type_names = {
 565     any => 1,
 566     'echo-reply' => 1,
 567     'destination-unreachable' => 1,
 568     'network-unreachable' => 1,
 569     'host-unreachable' => 1,
 570     'protocol-unreachable' => 1,
 571     'port-unreachable' => 1,
 572     'fragmentation-needed' => 1,
 573     'source-route-failed' => 1,
 574     'network-unknown' => 1,
 575     'host-unknown' => 1,
 576     'network-prohibited' => 1,
 577     'host-prohibited' => 1,
 578     'TOS-network-unreachable' => 1,
 579     'TOS-host-unreachable' => 1,
 580     'communication-prohibited' => 1,
 581     'host-precedence-violation' => 1,
 582     'precedence-cutoff' => 1,
 583     'source-quench' => 1,
 584     'redirect' => 1,
 585     'network-redirect' => 1,
 586     'host-redirect' => 1,
 587     'TOS-network-redirect' => 1,
 588     'TOS-host-redirect' => 1,
 589     'echo-request' => 1,
 590     'router-advertisement' => 1,
 591     'router-solicitation' => 1,
 592     'time-exceeded' => 1,
 593     'ttl-zero-during-transit' => 1,
 594     'ttl-zero-during-reassembly' => 1,
 595     'parameter-problem' => 1,
 596     'ip-header-bad' => 1,
 597     'required-option-missing' => 1,
 598     'timestamp-request' => 1,
 599     'timestamp-reply' => 1,
 600     'address-mask-request' => 1,
 601     'address-mask-reply' => 1,
 602 };
 603
 604 sub init_firewall_macros {
 605
 606     $pve_fw_parsed_macros = {};
 607
 608     foreach my $k (keys %$pve_fw_macros) {
 609         my $lc_name = lc($k);
 610         my $macro = $pve_fw_macros->{$k};
 611         if (!ref($macro->[0])) {
 612             $pve_fw_macro_descr->{$k} = shift @$macro;
 613         }
 614         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 615         $pve_fw_parsed_macros->{$k} = $macro;
 616     }
 617 }
 618
 619 init_firewall_macros();
 620
 621 sub get_macros {
 622     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 623 }
 624
 625 my $etc_services;
 626
 627 sub get_etc_services {
 628
 629     return $etc_services if $etc_services;
 630
 631     my $filename = "/etc/services";
 632
 633     my $fh = IO::File->new($filename, O_RDONLY);
 634     if (!$fh) {
 635         warn "unable to read '$filename' - $!\n";
 636         return {};
 637     }
 638
 639     my $services = {};
 640
 641     while (my $line = <$fh>) {
 642         chomp ($line);
 643         next if $line =~m/^#/;
 644         next if ($line =~m/^\s*$/);
 645
 646         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 647             $services->{byid}->{$2}->{name} = $1;
 648             $services->{byid}->{$2}->{port} = $2;
 649             $services->{byid}->{$2}->{$3} = 1;
 650             $services->{byname}->{$1} = $services->{byid}->{$2};
 651         }
 652     }
 653
 654     close($fh);
 655
 656     $etc_services = $services;
 657
 658
 659     return $etc_services;
 660 }
 661
 662 my $etc_protocols;
 663
 664 sub get_etc_protocols {
 665     return $etc_protocols if $etc_protocols;
 666
 667     my $filename = "/etc/protocols";
 668
 669     my $fh = IO::File->new($filename, O_RDONLY);
 670     if (!$fh) {
 671         warn "unable to read '$filename' - $!\n";
 672         return {};
 673     }
 674
 675     my $protocols = {};
 676
 677     while (my $line = <$fh>) {
 678         chomp ($line);
 679         next if $line =~m/^#/;
 680         next if ($line =~m/^\s*$/);
 681
 682         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 683             $protocols->{byid}->{$2}->{name} = $1;
 684             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 685         }
 686     }
 687
 688     close($fh);
 689
 690     $etc_protocols = $protocols;
 691
 692     return $etc_protocols;
 693 }
 694
 695 my $ipv4_mask_hash_localnet = {
 696     '255.255.0.0' => 16,
 697     '255.255.128.0' => 17,
 698     '255.255.192.0' => 18,
 699     '255.255.224.0' => 19,
 700     '255.255.240.0' => 20,
 701     '255.255.248.0' => 21,
 702     '255.255.252.0' => 22,
 703     '255.255.254.0' => 23,
 704     '255.255.255.0' => 24,
 705     '255.255.255.128' => 25,
 706     '255.255.255.192' => 26,
 707     '255.255.255.224' => 27,
 708     '255.255.255.240' => 28,
 709     '255.255.255.248' => 29,
 710     '255.255.255.252' => 30,
 711 };
 712
 713 my $__local_network;
 714
 715 sub local_network {
 716     my ($new_value) = @_;
 717
 718     $__local_network = $new_value if defined($new_value);
 719
 720     return $__local_network if defined($__local_network);
 721
 722     eval {
 723         my $nodename = PVE::INotify::nodename();
 724
 725         my $ip = PVE::Cluster::remote_node_ip($nodename);
 726
 727         my $testip = Net::IP->new($ip);
 728
 729         my $routes = PVE::ProcFSTools::read_proc_net_route();
 730         foreach my $entry (@$routes) {
 731             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 732             next if !defined($mask);
 733             return if $mask eq '0.0.0.0';
 734             my $cidr = "$entry->{dest}/$mask";
 735             my $testnet = Net::IP->new($cidr);
 736             if ($testnet->overlaps($testip)) {
 737                 $__local_network = $cidr;
 738                 return;
 739             }
 740         }
 741     };
 742     warn $@ if $@;
 743
 744     return $__local_network;
 745 }
 746
 747 my $max_iptables_ipset_name_length = 27;
 748
 749 sub compute_ipset_chain_name {
 750     my ($vmid, $ipset_name) = @_;
 751
 752     $vmid = 0 if !defined($vmid);
 753
 754     my $id = "$vmid-${ipset_name}";
 755
 756
 757     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 758         $id = PVE::Tools::fnv31a_hex($id);
 759     }
 760
 761     return "PVEFW-$id";
 762 }
 763
 764 sub parse_address_list {
 765     my ($str) = @_;
 766
 767     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 768         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 769         return;
 770     }
 771
 772     if ($str =~ m/^${ip_alias_pattern}$/) {
 773         die "alias name too long\n" if length($str) > $max_alias_name_length;
 774         return;
 775     }
 776
 777     my $count = 0;
 778     my $iprange = 0;
 779     foreach my $elem (split(/,/, $str)) {
 780         $count++;
 781         if (!Net::IP->new($elem)) {
 782             my $err = Net::IP::Error();
 783             die "invalid IP address: $err\n";
 784         }
 785         $iprange = 1 if $elem =~ m/-/;
 786     }
 787
 788     die "you can use a range in a list\n" if $iprange && $count > 1;
 789 }
 790
 791 sub parse_port_name_number_or_range {
 792     my ($str) = @_;
 793
 794     my $services = PVE::Firewall::get_etc_services();
 795     my $count = 0;
 796     my $icmp_port = 0;
 797
 798     foreach my $item (split(/,/, $str)) {
 799         $count++;
 800         if ($item =~ m/^(\d+):(\d+)$/) {
 801             my ($port1, $port2) = ($1, $2);
 802             die "invalid port '$port1'\n" if $port1 > 65535;
 803             die "invalid port '$port2'\n" if $port2 > 65535;
 804         } elsif ($item =~ m/^(\d+)$/) {
 805             my $port = $1;
 806             die "invalid port '$port'\n" if $port > 65535;
 807         } else {
 808             if ($icmp_type_names->{$item}) {
 809                 $icmp_port = 1;
 810             } else {
 811                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 812             }
 813         }
 814     }
 815
 816     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 817
 818     return $count;
 819 }
 820
 821 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 822 sub pve_fw_verify_port_spec {
 823    my ($portstr) = @_;
 824
 825    parse_port_name_number_or_range($portstr);
 826
 827    return $portstr;
 828 }
 829
 830 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 831 sub pve_fw_verify_v4addr_spec {
 832    my ($list) = @_;
 833
 834    parse_address_list($list);
 835
 836    return $list;
 837 }
 838
 839 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 840 sub pve_fw_verify_protocol_spec {
 841    my ($proto) = @_;
 842
 843    my $protocols = get_etc_protocols();
 844
 845    die "unknown protocol '$proto'\n" if $proto &&
 846        !(defined($protocols->{byname}->{$proto}) ||
 847          defined($protocols->{byid}->{$proto}));
 848
 849    return $proto;
 850 }
 851
 852
 853 # helper function for API
 854
 855 sub copy_opject_with_digest {
 856     my ($object) = @_;
 857
 858     my $sha = Digest::SHA->new('sha1');
 859
 860     my $res = {};
 861     foreach my $k (sort keys %$object) {
 862         my $v = $object->{$k};
 863         next if !defined($v);
 864         $res->{$k} = $v;
 865         $sha->add($k, ':', $v, "\n");
 866     }
 867
 868     my $digest = $sha->hexdigest;
 869
 870     $res->{digest} = $digest;
 871
 872     return wantarray ? ($res, $digest) : $res;
 873 }
 874
 875 sub copy_list_with_digest {
 876     my ($list) = @_;
 877
 878     my $sha = Digest::SHA->new('sha1');
 879
 880     my $res = [];
 881     foreach my $entry (@$list) {
 882         my $data = {};
 883         foreach my $k (sort keys %$entry) {
 884             my $v = $entry->{$k};
 885             next if !defined($v);
 886             $data->{$k} = $v;
 887             # Note: digest ignores refs ($rule->{errors})
 888             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 889         }
 890         push @$res, $data;
 891     }
 892
 893     my $digest = $sha->hexdigest;
 894
 895     foreach my $entry (@$res) {
 896         $entry->{digest} = $digest;
 897     }
 898
 899     return wantarray ? ($res, $digest) : $res;
 900 }
 901
 902 my $rule_properties = {
 903     pos => {
 904         description => "Update rule at position <pos>.",
 905         type => 'integer',
 906         minimum => 0,
 907         optional => 1,
 908     },
 909     digest => get_standard_option('pve-config-digest'),
 910     type => {
 911         type => 'string',
 912         optional => 1,
 913         enum => ['in', 'out', 'group'],
 914     },
 915     action => {
 916         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 917         type => 'string',
 918         optional => 1,
 919         pattern => $security_group_name_pattern,
 920         maxLength => 20,
 921         minLength => 2,
 922     },
 923     macro => {
 924         type => 'string',
 925         optional => 1,
 926         maxLength => 128,
 927     },
 928     iface => get_standard_option('pve-iface', { optional => 1 }),
 929     source => {
 930         type => 'string', format => 'pve-fw-v4addr-spec',
 931         optional => 1,
 932     },
 933     dest => {
 934         type => 'string', format => 'pve-fw-v4addr-spec',
 935         optional => 1,
 936     },
 937     proto => {
 938         type => 'string', format => 'pve-fw-protocol-spec',
 939         optional => 1,
 940     },
 941     enable => {
 942         type => 'boolean',
 943         optional => 1,
 944     },
 945     sport => {
 946         type => 'string', format => 'pve-fw-port-spec',
 947         optional => 1,
 948     },
 949     dport => {
 950         type => 'string', format => 'pve-fw-port-spec',
 951         optional => 1,
 952     },
 953     comment => {
 954         type => 'string',
 955         optional => 1,
 956     },
 957 };
 958
 959 sub add_rule_properties {
 960     my ($properties) = @_;
 961
 962     foreach my $k (keys %$rule_properties) {
 963         my $h = $rule_properties->{$k};
 964         # copy data, so that we can modify later without side effects
 965         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 966     }
 967
 968     return $properties;
 969 }
 970
 971 sub delete_rule_properties {
 972     my ($rule, $delete_str) = @_;
 973
 974     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 975         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 976             if !defined($rule_properties->{$opt});
 977         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 978             if $opt eq 'type' || $opt eq 'action';
 979         delete $rule->{$opt};
 980     }
 981
 982     return $rule;
 983 }
 984
 985 my $apply_macro = sub {
 986     my ($macro_name, $param, $verify) = @_;
 987
 988     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 989     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 990
 991     my $rules = [];
 992
 993     foreach my $templ (@$macro_rules) {
 994         my $rule = {};
 995         my $param_used = {};
 996         foreach my $k (keys %$templ) {
 997             my $v = $templ->{$k};
 998             if ($v eq 'PARAM') {
 999                 $v = $param->{$k};
1000                 $param_used->{$k} = 1;
1001             } elsif ($v eq 'DEST') {
1002                 $v = $param->{dest};
1003                 $param_used->{dest} = 1;
1004             } elsif ($v eq 'SOURCE') {
1005                 $v = $param->{source};
1006                 $param_used->{source} = 1;
1007             }
1008
1009             if (!defined($v)) {
1010                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1011                 raise_param_exc({ macro => $msg }) if $verify;
1012                 die "$msg\n";
1013             }
1014             $rule->{$k} = $v;
1015         }
1016         foreach my $k (keys %$param) {
1017             next if $k eq 'macro';
1018             next if !defined($param->{$k});
1019             next if $param_used->{$k};
1020             if (defined($rule->{$k})) {
1021                 if ($rule->{$k} ne $param->{$k}) {
1022                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1023                     raise_param_exc({ $k => $msg }) if $verify;
1024                     die "$msg\n";
1025                 }
1026             } else {
1027                 $rule->{$k} = $param->{$k};
1028             }
1029         }
1030         push @$rules, $rule;
1031     }
1032
1033     return $rules;
1034 };
1035
1036 my $rule_env_iface_lookup = {
1037     'ct' => 1,
1038     'vm' => 1,
1039     'group' => 0,
1040     'cluster' => 1,
1041     'host' => 1,
1042 };
1043
1044 sub verify_rule {
1045     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1046
1047     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1048
1049     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1050     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1051
1052     my $errors = $rule->{errors} || {};
1053
1054     my $error_count = 0;
1055
1056     my $add_error = sub {
1057         my ($param, $msg)  = @_;
1058         chomp $msg;
1059         raise_param_exc({ $param => $msg }) if !$noerr;
1060         $error_count++;
1061         $errors->{$param} = $msg if !$errors->{$param};
1062     };
1063
1064     my $check_ipset_or_alias_property = sub {
1065         my ($name) = @_;
1066
1067         if (my $value = $rule->{$name}) {
1068             if ($value =~ m/^\+/) {
1069                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1070                     &$add_error($name, "no such ipset '$1'")
1071                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1072
1073                 } else {
1074                     &$add_error($name, "invalid ipset name '$value'");
1075                 }
1076             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1077                 my $alias = lc($value);
1078                 &$add_error($name, "no such alias '$value'")
1079                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1080             }
1081         }
1082     };
1083
1084     my $type = $rule->{type};
1085     my $action = $rule->{action};
1086
1087     &$add_error('type', "missing property") if !$type;
1088     &$add_error('action', "missing property") if !$action;
1089
1090     if ($type) {
1091         if ($type eq  'in' || $type eq 'out') {
1092             &$add_error('action', "unknown action '$action'")
1093                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1094         } elsif ($type eq 'group') {
1095             &$add_error('type', "security groups not allowed")
1096                 if !$allow_groups;
1097             &$add_error('action', "invalid characters in security group name")
1098                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1099         } else {
1100             &$add_error('type', "unknown rule type '$type'");
1101         }
1102     }
1103
1104     if ($rule->{iface}) {
1105         &$add_error('type', "parameter -i not allowed for this rule type")
1106             if !$allow_iface;
1107         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1108         &$add_error('iface', $@) if $@;
1109         if ($rule_env eq 'vm') {
1110             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1111                 if $rule->{iface} !~  m/^net(\d+)$/;
1112         } elsif ($rule_env eq 'ct') {
1113             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1114                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1115         }
1116     }
1117
1118     if ($rule->{macro}) {
1119         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1120             $rule->{macro} = $preferred_name;
1121         } else {
1122             &$add_error('macro', "unknown macro '$rule->{macro}'");
1123         }
1124     }
1125
1126     if ($rule->{proto}) {
1127         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1128         &$add_error('proto', $@) if $@;
1129     }
1130
1131     if ($rule->{dport}) {
1132         eval { parse_port_name_number_or_range($rule->{dport}); };
1133         &$add_error('dport', $@) if $@;
1134         &$add_error('proto', "missing property - 'dport' requires this property")
1135             if !$rule->{proto};
1136     }
1137
1138     if ($rule->{sport}) {
1139         eval { parse_port_name_number_or_range($rule->{sport}); };
1140         &$add_error('sport', $@) if $@;
1141         &$add_error('proto', "missing property - 'sport' requires this property")
1142             if !$rule->{proto};
1143     }
1144
1145     if ($rule->{source}) {
1146         eval { parse_address_list($rule->{source}); };
1147         &$add_error('source', $@) if $@;
1148         &$check_ipset_or_alias_property('source');
1149     }
1150
1151     if ($rule->{dest}) {
1152         eval { parse_address_list($rule->{dest}); };
1153         &$add_error('dest', $@) if $@;
1154         &$check_ipset_or_alias_property('dest');
1155     }
1156
1157     if ($rule->{macro} && !$error_count) {
1158         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1159         if (my $err = $@) {
1160             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1161                 my $eh = $err->{errors};
1162                 foreach my $p (keys %$eh) {
1163                     &$add_error($p, $eh->{$p});
1164                 }
1165             } else {
1166                 &$add_error('macro', "$err");
1167             }
1168         }
1169     }
1170
1171     $rule->{errors} = $errors if $error_count;
1172
1173     return $rule;
1174 }
1175
1176 sub copy_rule_data {
1177     my ($rule, $param) = @_;
1178
1179     foreach my $k (keys %$rule_properties) {
1180         if (defined(my $v = $param->{$k})) {
1181             if ($v eq '' || $v eq '-') {
1182                 delete $rule->{$k};
1183             } else {
1184                 $rule->{$k} = $v;
1185             }
1186         }
1187     }
1188
1189     return $rule;
1190 }
1191
1192 # core functions
1193 my $bridge_firewall_enabled = 0;
1194
1195 sub enable_bridge_firewall {
1196
1197     return if $bridge_firewall_enabled; # only once
1198
1199     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1200     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1201
1202     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1203     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1204
1205     $bridge_firewall_enabled = 1;
1206 }
1207
1208 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1209
1210 sub iptables_restore_cmdlist {
1211     my ($cmdlist) = @_;
1212
1213     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1214 }
1215
1216 sub ipset_restore_cmdlist {
1217     my ($cmdlist) = @_;
1218
1219     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1220 }
1221
1222 sub iptables_get_chains {
1223
1224     my $res = {};
1225
1226     # check what chains we want to track
1227     my $is_pvefw_chain = sub {
1228         my $name = shift;
1229
1230         return 1 if $name =~ m/^PVEFW-\S+$/;
1231
1232         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1233
1234         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1235
1236         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1237
1238         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1239         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1240
1241         return undef;
1242     };
1243
1244     my $table = '';
1245
1246     my $hooks = {};
1247
1248     my $parser = sub {
1249         my $line = shift;
1250
1251         return if $line =~ m/^#/;
1252         return if $line =~ m/^\s*$/;
1253
1254         if ($line =~ m/^\*(\S+)$/) {
1255             $table = $1;
1256             return;
1257         }
1258
1259         return if $table ne 'filter';
1260
1261         if ($line =~ m/^:(\S+)\s/) {
1262             my $chain = $1;
1263             return if !&$is_pvefw_chain($chain);
1264             $res->{$chain} = "unknown";
1265         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1266             my ($chain, $sig) = ($1, $2);
1267             return if !&$is_pvefw_chain($chain);
1268             $res->{$chain} = $sig;
1269         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1270             $hooks->{$1} = 1;
1271         } else {
1272             # simply ignore the rest
1273             return;
1274         }
1275     };
1276
1277     run_command("/sbin/iptables-save", outfunc => $parser);
1278
1279     return wantarray ? ($res, $hooks) : $res;
1280 }
1281
1282 sub iptables_chain_digest {
1283     my ($rules) = @_;
1284     my $digest = Digest::SHA->new('sha1');
1285     foreach my $rule (@$rules) { # order is important
1286         $digest->add($rule);
1287     }
1288     return $digest->b64digest;
1289 }
1290
1291 sub ipset_chain_digest {
1292     my ($rules) = @_;
1293
1294     my $digest = Digest::SHA->new('sha1');
1295     foreach my $rule (sort @$rules) { # note: sorted
1296         $digest->add($rule);
1297     }
1298     return $digest->b64digest;
1299 }
1300
1301 sub ipset_get_chains {
1302
1303     my $res = {};
1304     my $chains = {};
1305
1306     my $parser = sub {
1307         my $line = shift;
1308
1309         return if $line =~ m/^#/;
1310         return if $line =~ m/^\s*$/;
1311         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1312             my $chain = $1;
1313             $line =~ s/\s+$//; # delete trailing white space
1314             push @{$chains->{$chain}}, $line;
1315         } else {
1316             # simply ignore the rest
1317             return;
1318         }
1319     };
1320
1321     run_command("/usr/sbin/ipset save", outfunc => $parser);
1322
1323     # compute digest for each chain
1324     foreach my $chain (keys %$chains) {
1325         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1326     }
1327
1328     return $res;
1329 }
1330
1331 sub ruleset_generate_cmdstr {
1332     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1333
1334     return if defined($rule->{enable}) && !$rule->{enable};
1335     return if $rule->{errors};
1336
1337     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1338
1339     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1340     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1341
1342     my @cmd = ();
1343
1344     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1345     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1346
1347     my $source = $rule->{source};
1348     my $dest = $rule->{dest};
1349
1350     if ($source) {
1351         if ($source =~ m/^\+/) {
1352             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1353                 my $name = $1;
1354                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1355                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1356                     push @cmd, "-m set --match-set ${ipset_chain} src";
1357                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1358                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1359                     push @cmd, "-m set --match-set ${ipset_chain} src";
1360                 } else {
1361                     die "no such ipset '$name'\n";
1362                 }
1363             } else {
1364                 die "invalid security group name '$source'\n";
1365             }
1366         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1367             my $alias = lc($source);
1368             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1369             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1370             die "no such alias '$source'\n" if !$e;
1371             push @cmd, "-s $e->{cidr}";
1372         } elsif ($source =~ m/\-/){
1373             push @cmd, "-m iprange --src-range $source";
1374         } else {
1375             push @cmd, "-s $source";
1376         }
1377     }
1378
1379     if ($dest) {
1380         if ($dest =~ m/^\+/) {
1381             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1382                 my $name = $1;
1383                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1384                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1385                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1386                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1387                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1388                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1389                 } else {
1390                     die "no such ipset '$name'\n";
1391                 }
1392             } else {
1393                 die "invalid security group name '$dest'\n";
1394             }
1395         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1396             my $alias = lc($dest);
1397             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1398             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1399             die "no such alias '$dest'\n" if !$e;
1400             push @cmd, "-d $e->{cidr}";
1401         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1402             push @cmd, "-m iprange --dst-range $dest";
1403         } else {
1404             push @cmd, "-d $dest";
1405         }
1406     }
1407
1408     if ($rule->{proto}) {
1409         push @cmd, "-p $rule->{proto}";
1410
1411         my $multiport = 0;
1412         $multiport++ if $nbdport > 1;
1413         $multiport++ if $nbsport > 1;
1414
1415         push @cmd, "--match multiport" if $multiport;
1416
1417         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1418             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1419
1420         if ($rule->{dport}) {
1421             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1422                 # Note: we use dport to store --icmp-type
1423                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1424                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1425             } else {
1426                 if ($nbdport > 1) {
1427                     if ($multiport == 2) {
1428                         push @cmd,  "--ports $rule->{dport}";
1429                     } else {
1430                         push @cmd, "--dports $rule->{dport}";
1431                     }
1432                 } else {
1433                     push @cmd, "--dport $rule->{dport}";
1434                 }
1435             }
1436         }
1437
1438         if ($rule->{sport}) {
1439             if ($nbsport > 1) {
1440                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1441             } else {
1442                 push @cmd, "--sport $rule->{sport}";
1443             }
1444         }
1445     } elsif ($rule->{dport} || $rule->{sport}) {
1446         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1447         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1448     }
1449
1450     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1451
1452     if (my $action = $rule->{action}) {
1453         $action = $actions->{$action} if defined($actions->{$action});
1454         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1455         push @cmd, $goto ? "-g $action" : "-j $action";
1456     }
1457
1458     return scalar(@cmd) ? join(' ', @cmd) : undef;
1459 }
1460
1461 sub ruleset_generate_rule {
1462     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1463
1464     my $rules;
1465
1466     if ($rule->{macro}) {
1467         $rules = &$apply_macro($rule->{macro}, $rule);
1468     } else {
1469         $rules = [ $rule ];
1470     }
1471
1472     # update all or nothing
1473
1474     my @cmds = ();
1475     foreach my $tmp (@$rules) {
1476         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1477             push @cmds, $cmdstr;
1478         }
1479     }
1480
1481     foreach my $cmdstr (@cmds) {
1482         ruleset_addrule($ruleset, $chain, $cmdstr);
1483     }
1484 }
1485
1486 sub ruleset_generate_rule_insert {
1487     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1488
1489     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1490
1491     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1492         ruleset_insertrule($ruleset, $chain, $cmdstr);
1493     }
1494 }
1495
1496 sub ruleset_create_chain {
1497     my ($ruleset, $chain) = @_;
1498
1499     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1500     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1501
1502     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1503
1504     $ruleset->{$chain} = [];
1505 }
1506
1507 sub ruleset_chain_exist {
1508     my ($ruleset, $chain) = @_;
1509
1510     return $ruleset->{$chain} ? 1 : undef;
1511 }
1512
1513 sub ruleset_addrule {
1514    my ($ruleset, $chain, $rule) = @_;
1515
1516    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1517
1518    push @{$ruleset->{$chain}}, "-A $chain $rule";
1519 }
1520
1521 sub ruleset_insertrule {
1522    my ($ruleset, $chain, $rule) = @_;
1523
1524    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1525
1526    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1527 }
1528
1529 sub get_log_rule_base {
1530     my ($chain, $vmid, $msg, $loglevel) = @_;
1531
1532     die "internal error - no log level" if !defined($loglevel);
1533
1534     $vmid = 0 if !defined($vmid);
1535
1536     # Note: we use special format for prefix to pass further
1537     # info to log daemon (VMID, LOGVELEL and CHAIN)
1538
1539     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1540 }
1541
1542 sub ruleset_addlog {
1543     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1544
1545     return if !defined($loglevel);
1546
1547     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1548
1549     $logrule = "$rule $logrule" if defined($rule);
1550
1551     ruleset_addrule($ruleset, $chain, $logrule);
1552 }
1553
1554 sub ruleset_add_chain_policy {
1555     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1556
1557     if ($policy eq 'ACCEPT') {
1558
1559         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1560                               { ACCEPT =>  $accept_action});
1561
1562     } elsif ($policy eq 'DROP') {
1563
1564         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1565
1566         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1567
1568         ruleset_addrule($ruleset, $chain, "-j DROP");
1569     } elsif ($policy eq 'REJECT') {
1570         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1571
1572         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1573
1574         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1575     } else {
1576         # should not happen
1577         die "internal error: unknown policy '$policy'";
1578     }
1579 }
1580
1581 sub ruleset_chain_add_conn_filters {
1582     my ($ruleset, $chain, $accept) = @_;
1583
1584     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1585     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1586 }
1587
1588 sub ruleset_chain_add_input_filters {
1589     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1590
1591     if ($cluster_conf->{ipset}->{blacklist}){
1592         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1593             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1594             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1595             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1596         }
1597         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1598         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1599     }
1600
1601     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1602         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1603     }
1604
1605     if ($options->{tcpflags}) {
1606         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1607     }
1608 }
1609
1610 sub ruleset_create_vm_chain {
1611     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1612
1613     ruleset_create_chain($ruleset, $chain);
1614     my $accept = generate_nfqueue($options);
1615
1616     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1617         if ($direction eq 'OUT') {
1618             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1619                                                       proto => 'udp', sport => 68, dport => 67 });
1620         } else {
1621             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1622                                                       proto => 'udp', sport => 67, dport => 68 });
1623         }
1624     }
1625
1626     if ($direction eq 'OUT') {
1627         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1628             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1629         }
1630         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1631     }
1632 }
1633
1634 sub ruleset_add_group_rule {
1635     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1636
1637     my $group = $rule->{action};
1638     my $group_chain = "GROUP-$group-$direction";
1639     if(!ruleset_chain_exist($ruleset, $group_chain)){
1640         generate_group_rules($ruleset, $cluster_conf, $group);
1641     }
1642
1643     if ($direction eq 'OUT' && $rule->{iface_out}) {
1644         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1645     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1646         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1647     } else {
1648         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1649     }
1650
1651     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1652 }
1653
1654 sub ruleset_generate_vm_rules {
1655     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1656
1657     my $lc_direction = lc($direction);
1658
1659     my $in_accept = generate_nfqueue($options);
1660
1661     foreach my $rule (@$rules) {
1662         next if $rule->{iface} && $rule->{iface} ne $netid;
1663         next if !$rule->{enable} || $rule->{errors};
1664         if ($rule->{type} eq 'group') {
1665             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1666                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1667         } else {
1668             next if $rule->{type} ne $lc_direction;
1669             eval {
1670                 if ($direction eq 'OUT') {
1671                     ruleset_generate_rule($ruleset, $chain, $rule,
1672                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1673                                           undef, $cluster_conf, $vmfw_conf);
1674                 } else {
1675                     ruleset_generate_rule($ruleset, $chain, $rule,
1676                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1677                                           undef, $cluster_conf, $vmfw_conf);
1678                 }
1679             };
1680             warn $@ if $@;
1681         }
1682     }
1683 }
1684
1685 sub generate_nfqueue {
1686     my ($options) = @_;
1687
1688     if ($options->{ips}) {
1689         my $action = "NFQUEUE";
1690         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1691             if (defined($3) && defined($1)) {
1692                 $action .= " --queue-balance $1:$3";
1693             } elsif (defined($1)) {
1694                 $action .= " --queue-num $1";
1695             }
1696         }
1697         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1698         return $action;
1699     } else {
1700         return "ACCEPT";
1701     }
1702 }
1703
1704 sub ruleset_generate_vm_ipsrules {
1705     my ($ruleset, $options, $direction, $iface) = @_;
1706
1707     if ($options->{ips} && $direction eq 'IN') {
1708         my $nfqueue = generate_nfqueue($options);
1709
1710         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1711             ruleset_create_chain($ruleset, "PVEFW-IPS");
1712         }
1713
1714         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1715     }
1716 }
1717
1718 sub generate_venet_rules_direction {
1719     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1720
1721     my $lc_direction = lc($direction);
1722
1723     my $rules = $vmfw_conf->{rules};
1724
1725     my $options = $vmfw_conf->{options};
1726     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1727
1728     my $chain = "venet0-$vmid-$direction";
1729
1730     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1731
1732     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1733
1734     # implement policy
1735     my $policy;
1736
1737     if ($direction eq 'OUT') {
1738         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1739     } else {
1740         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1741     }
1742
1743     my $accept = generate_nfqueue($options);
1744     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1745     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1746
1747     if ($direction eq 'OUT') {
1748         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1749             action => $chain,
1750             source => $ip,
1751             iface_in => 'venet0'});
1752     } else {
1753         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1754             action => $chain,
1755             dest => $ip,
1756             iface_out => 'venet0'});
1757     }
1758 }
1759
1760 sub generate_tap_rules_direction {
1761     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1762
1763     my $lc_direction = lc($direction);
1764
1765     my $rules = $vmfw_conf->{rules};
1766
1767     my $options = $vmfw_conf->{options};
1768     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1769
1770     my $tapchain = "$iface-$direction";
1771
1772     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1773
1774     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1775
1776     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1777
1778     # implement policy
1779     my $policy;
1780
1781     if ($direction eq 'OUT') {
1782         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1783     } else {
1784         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1785     }
1786
1787     my $accept = generate_nfqueue($options);
1788     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1789     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1790
1791     # plug the tap chain to bridge chain
1792     if ($direction eq 'IN') {
1793         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1794                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1795     } else {
1796         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1797                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1798     }
1799 }
1800
1801 sub enable_host_firewall {
1802     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1803
1804     my $options = $hostfw_conf->{options};
1805     my $cluster_options = $cluster_conf->{options};
1806     my $rules = $hostfw_conf->{rules};
1807     my $cluster_rules = $cluster_conf->{rules};
1808
1809     # host inbound firewall
1810     my $chain = "PVEFW-HOST-IN";
1811     ruleset_create_chain($ruleset, $chain);
1812
1813     my $loglevel = get_option_log_level($options, "log_level_in");
1814
1815     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1816
1817     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1818     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1819
1820     # we use RETURN because we need to check also tap rules
1821     my $accept_action = 'RETURN';
1822
1823     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1824
1825     # add host rules first, so that cluster wide rules can be overwritten
1826     foreach my $rule (@$rules, @$cluster_rules) {
1827         next if !$rule->{enable} || $rule->{errors};
1828
1829         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1830
1831         eval {
1832             if ($rule->{type} eq 'group') {
1833                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1834             } elsif ($rule->{type} eq 'in') {
1835                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1836                                       undef, $cluster_conf, $hostfw_conf);
1837             }
1838         };
1839         warn $@ if $@;
1840         delete $rule->{iface_in};
1841     }
1842
1843     # allow standard traffic for management ipset (includes cluster network)
1844     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1845     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1846     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1847     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1848     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1849     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1850
1851     my $localnet = local_network();
1852
1853     # corosync
1854     if ($localnet) {
1855         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1856         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1857         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1858     }
1859
1860     # implement input policy
1861     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1862     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1863
1864     # host outbound firewall
1865     $chain = "PVEFW-HOST-OUT";
1866     ruleset_create_chain($ruleset, $chain);
1867
1868     $loglevel = get_option_log_level($options, "log_level_out");
1869
1870     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1871
1872     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1873
1874     # we use RETURN because we may want to check other thigs later
1875     $accept_action = 'RETURN';
1876
1877     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1878
1879     # add host rules first, so that cluster wide rules can be overwritten
1880     foreach my $rule (@$rules, @$cluster_rules) {
1881         next if !$rule->{enable} || $rule->{errors};
1882
1883         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1884         eval {
1885             if ($rule->{type} eq 'group') {
1886                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1887             } elsif ($rule->{type} eq 'out') {
1888                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1889                                       undef, $cluster_conf, $hostfw_conf);
1890             }
1891         };
1892         warn $@ if $@;
1893         delete $rule->{iface_out};
1894     }
1895
1896     # allow standard traffic on cluster network
1897     if ($localnet) {
1898         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1899         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1900         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1901         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1902
1903         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1904         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1905         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1906     }
1907
1908     # implement output policy
1909     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1910     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1911
1912     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1913     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1914 }
1915
1916 sub generate_group_rules {
1917     my ($ruleset, $cluster_conf, $group) = @_;
1918
1919     my $rules = $cluster_conf->{groups}->{$group};
1920
1921     if (!$rules) {
1922         warn "no such security group '$group'\n";
1923         $rules = []; # create empty chain
1924     }
1925
1926     my $chain = "GROUP-${group}-IN";
1927
1928     ruleset_create_chain($ruleset, $chain);
1929     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1930
1931     foreach my $rule (@$rules) {
1932         next if $rule->{type} ne 'in';
1933         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1934     }
1935
1936     $chain = "GROUP-${group}-OUT";
1937
1938     ruleset_create_chain($ruleset, $chain);
1939     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1940
1941     foreach my $rule (@$rules) {
1942         next if $rule->{type} ne 'out';
1943         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1944         # check also other tap rules later
1945         ruleset_generate_rule($ruleset, $chain, $rule,
1946                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1947     }
1948 }
1949
1950 my $MAX_NETS = 32;
1951 my $valid_netdev_names = {};
1952 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1953     $valid_netdev_names->{"net$i"} = 1;
1954 }
1955
1956 sub parse_fw_rule {
1957     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1958
1959     chomp $line;
1960
1961     my $orig_line = $line;
1962
1963     my $rule = {};
1964
1965     # we can add single line comments to the end of the rule
1966     if ($line =~ s/#\s*(.*?)\s*$//) {
1967         $rule->{comment} = decode('utf8', $1);
1968     }
1969
1970     # we can disable a rule when prefixed with '|'
1971
1972     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1973
1974     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1975         die "unable to parse rule: $line\n";
1976
1977     $rule->{type} = lc($1);
1978     $rule->{action} = $2;
1979
1980     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1981         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1982             $rule->{macro} = $1;
1983             $rule->{action} = $2;
1984         }
1985     }
1986
1987     while (length($line)) {
1988         if ($line =~ s/^-i (\S+)\s*//) {
1989             $rule->{iface} = $1;
1990             next;
1991         }
1992
1993         last if $rule->{type} eq 'group';
1994
1995         if ($line =~ s/^-p (\S+)\s*//) {
1996             $rule->{proto} = $1;
1997             next;
1998         }
1999
2000         if ($line =~ s/^-dport (\S+)\s*//) {
2001             $rule->{dport} = $1;
2002             next;
2003         }
2004
2005         if ($line =~ s/^-sport (\S+)\s*//) {
2006             $rule->{sport} = $1;
2007             next;
2008         }
2009         if ($line =~ s/^-source (\S+)\s*//) {
2010             $rule->{source} = $1;
2011             next;
2012         }
2013         if ($line =~ s/^-dest (\S+)\s*//) {
2014             $rule->{dest} = $1;
2015             next;
2016         }
2017
2018         last;
2019     }
2020
2021     die "unable to parse rule parameters: $line\n" if length($line);
2022
2023     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2024     if ($verbose && $rule->{errors}) {
2025         warn "$prefix - errors in rule parameters: $orig_line\n";
2026         foreach my $p (keys %{$rule->{errors}}) {
2027             warn "  $p: $rule->{errors}->{$p}\n";
2028         }
2029     }
2030
2031     return $rule;
2032 }
2033
2034 sub parse_vmfw_option {
2035     my ($line) = @_;
2036
2037     my ($opt, $value);
2038
2039     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2040
2041     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2042         $opt = lc($1);
2043         $value = int($2);
2044     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2045         $opt = lc($1);
2046         $value = $2 ? lc($3) : '';
2047     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2048         $opt = lc($1);
2049         $value = uc($3);
2050     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2051         $opt = lc($1);
2052         $value = $2;
2053     } else {
2054         chomp $line;
2055         die "can't parse option '$line'\n"
2056     }
2057
2058     return ($opt, $value);
2059 }
2060
2061 sub parse_hostfw_option {
2062     my ($line) = @_;
2063
2064     my ($opt, $value);
2065
2066     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2067
2068     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2069         $opt = lc($1);
2070         $value = int($2);
2071     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2072         $opt = lc($1);
2073         $value = $2 ? lc($3) : '';
2074     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2075         $opt = lc($1);
2076         $value = int($2);
2077     } else {
2078         chomp $line;
2079         die "can't parse option '$line'\n"
2080     }
2081
2082     return ($opt, $value);
2083 }
2084
2085 sub parse_clusterfw_option {
2086     my ($line) = @_;
2087
2088     my ($opt, $value);
2089
2090     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2091         $opt = lc($1);
2092         $value = int($2);
2093     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2094         $opt = lc($1);
2095         $value = uc($3);
2096     } else {
2097         chomp $line;
2098         die "can't parse option '$line'\n"
2099     }
2100
2101     return ($opt, $value);
2102 }
2103
2104 sub parse_alias {
2105     my ($line) = @_;
2106
2107     # we can add single line comments to the end of the line
2108     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2109
2110     if ($line =~ m/^(\S+)\s(\S+)$/) {
2111         my ($name, $cidr) = ($1, $2);
2112         $cidr =~ s|/32$||;
2113         pve_verify_ipv4_or_cidr($cidr);
2114         my $data = {
2115             name => $name,
2116             cidr => $cidr,
2117         };
2118         $data->{comment} = $comment  if $comment;
2119         return $data;
2120     }
2121
2122     return undef;
2123 }
2124
2125 sub generic_fw_rules_parser {
2126     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2127
2128     my $section;
2129     my $group;
2130
2131     my $res = $empty_conf;
2132
2133     my $ipset_option = get_standard_option('ipset-name');
2134
2135     while (defined(my $line = <$fh>)) {
2136         next if $line =~ m/^#/;
2137         next if $line =~ m/^\s*$/;
2138
2139         my $linenr = $fh->input_line_number();
2140         my $prefix = "$filename (line $linenr)";
2141
2142         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2143             $section = 'options';
2144             next;
2145         }
2146
2147         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2148             $section = 'aliases';
2149             next;
2150         }
2151
2152         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2153             $section = 'groups';
2154             $group = lc($1);
2155             my $comment = $2;
2156             eval {
2157                 die "security group name too long\n" if length($group) > $max_group_name_length;
2158                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2159             };
2160             if (my $err = $@) {
2161                 ($section, $group, $comment) = undef;
2162                 warn "$prefix: $err";
2163                 next;
2164             }
2165
2166             $res->{$section}->{$group} = [];
2167             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2168                 if $comment;
2169             next;
2170         }
2171
2172         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2173             $section = 'rules';
2174             next;
2175         }
2176
2177         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2178             $section = 'ipset';
2179             $group = lc($1);
2180             my $comment = $2;
2181             eval {
2182                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2183                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2184             };
2185             if (my $err = $@) {
2186                 ($section, $group, $comment) = undef;
2187                 warn "$prefix: $err";
2188                 next;
2189             }
2190
2191             $res->{$section}->{$group} = [];
2192             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2193                 if $comment;
2194             next;
2195         }
2196
2197         if (!$section) {
2198             warn "$prefix: skip line - no section\n";
2199             next;
2200         }
2201
2202         if ($section eq 'options') {
2203             eval {
2204                 my ($opt, $value);
2205                 if ($rule_env eq 'cluster') {
2206                     ($opt, $value) = parse_clusterfw_option($line);
2207                 } elsif ($rule_env eq 'host') {
2208                     ($opt, $value) = parse_hostfw_option($line);
2209                 } else {
2210                     ($opt, $value) = parse_vmfw_option($line);
2211                 }
2212                 $res->{options}->{$opt} = $value;
2213             };
2214             warn "$prefix: $@" if $@;
2215         } elsif ($section eq 'aliases') {
2216             eval {
2217                 my $data = parse_alias($line);
2218                 $res->{aliases}->{lc($data->{name})} = $data;
2219             };
2220             warn "$prefix: $@" if $@;
2221         } elsif ($section eq 'rules') {
2222             my $rule;
2223             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2224             if (my $err = $@) {
2225                 warn "$prefix: $err";
2226                 next;
2227             }
2228             push @{$res->{$section}}, $rule;
2229         } elsif ($section eq 'groups') {
2230             my $rule;
2231             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2232             if (my $err = $@) {
2233                 warn "$prefix: $err";
2234                 next;
2235             }
2236             push @{$res->{$section}->{$group}}, $rule;
2237         } elsif ($section eq 'ipset') {
2238             # we can add single line comments to the end of the rule
2239             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2240
2241             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2242             my $nomatch = $1;
2243             my $cidr = $2;
2244
2245             if($cidr !~ m/^${ip_alias_pattern}$/) {
2246                 $cidr =~ s|/32$||;
2247
2248                 eval { pve_verify_ipv4_or_cidr($cidr); };
2249                 if (my $err = $@) {
2250                     warn "$prefix: $cidr - $err";
2251                     next;
2252                 }
2253             }
2254
2255             my $entry = { cidr => $cidr };
2256             $entry->{nomatch} = 1 if $nomatch;
2257             $entry->{comment} = $comment if $comment;
2258
2259             push @{$res->{$section}->{$group}}, $entry;
2260         } else {
2261             warn "$prefix: skip line - unknown section\n";
2262             next;
2263         }
2264     }
2265
2266     return $res;
2267 }
2268
2269 sub parse_host_fw_rules {
2270     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2271
2272     my $empty_conf = { rules => [], options => {}};
2273
2274     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2275 }
2276
2277 sub parse_vm_fw_rules {
2278     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2279
2280     my $empty_conf = {
2281         rules => [],
2282         options => {},
2283         aliases => {},
2284         ipset => {} ,
2285         ipset_comments => {},
2286     };
2287
2288     return generic_fw_rules_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2289 }
2290
2291 sub parse_cluster_fw_rules {
2292     my ($filename, $fh, $verbose) = @_;
2293
2294     my $section;
2295     my $group;
2296
2297     my $empty_conf = {
2298         rules => [],
2299         options => {},
2300         aliases => {},
2301         groups => {},
2302         group_comments => {},
2303         ipset => {} ,
2304         ipset_comments => {},
2305     };
2306
2307     return generic_fw_rules_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2308 }
2309
2310 sub run_locked {
2311     my ($code, @param) = @_;
2312
2313     my $timeout = 10;
2314
2315     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2316
2317     die $@ if $@;
2318
2319     return $res;
2320 }
2321
2322 sub read_local_vm_config {
2323
2324     my $openvz = {};
2325     my $qemu = {};
2326
2327     my $vmdata = { openvz => $openvz, qemu => $qemu };
2328
2329     my $vmlist = PVE::Cluster::get_vmlist();
2330     return $vmdata if !$vmlist || !$vmlist->{ids};
2331     my $ids = $vmlist->{ids};
2332
2333     foreach my $vmid (keys %$ids) {
2334         next if !$vmid; # skip VE0
2335         my $d = $ids->{$vmid};
2336         next if !$d->{node} || $d->{node} ne $nodename;
2337         next if !$d->{type};
2338         if ($d->{type} eq 'openvz') {
2339             if ($have_pve_manager) {
2340                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2341                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2342                     $openvz->{$vmid} = $conf;
2343                 }
2344             }
2345         } elsif ($d->{type} eq 'qemu') {
2346             if ($have_qemu_server) {
2347                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2348                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2349                     $qemu->{$vmid} = $conf;
2350                 }
2351             }
2352         }
2353     }
2354
2355     return $vmdata;
2356 };
2357
2358 sub load_vmfw_conf {
2359     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2360
2361     my $vmfw_conf = {};
2362
2363     $dir = "/etc/pve/firewall" if !defined($dir);
2364
2365     my $filename = "$dir/$vmid.fw";
2366     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2367         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $cluster_conf, $rule_env, $verbose);
2368         $vmfw_conf->{vmid} = $vmid;
2369     }
2370
2371     return $vmfw_conf;
2372 }
2373
2374 my $format_rules = sub {
2375     my ($rules, $allow_iface) = @_;
2376
2377     my $raw = '';
2378
2379     foreach my $rule (@$rules) {
2380         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2381             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2382             $raw .= uc($rule->{type});
2383             if ($rule->{macro}) {
2384                 $raw .= " $rule->{macro}($rule->{action})";
2385             } else {
2386                 $raw .= " " . $rule->{action};
2387             }
2388             if ($allow_iface && $rule->{iface}) {
2389                 $raw .= " -i $rule->{iface}";
2390             }
2391
2392             if ($rule->{type} ne  'group')  {
2393                 $raw .= " -source $rule->{source}" if $rule->{source};
2394                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2395                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2396                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2397                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2398             }
2399
2400             $raw .= " # " . encode('utf8', $rule->{comment})
2401                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2402             $raw .= "\n";
2403         } else {
2404             die "unknown rule type '$rule->{type}'";
2405         }
2406     }
2407
2408     return $raw;
2409 };
2410
2411 my $format_options = sub {
2412     my ($options) = @_;
2413
2414     my $raw = '';
2415
2416     $raw .= "[OPTIONS]\n\n";
2417     foreach my $opt (keys %$options) {
2418         $raw .= "$opt: $options->{$opt}\n";
2419     }
2420     $raw .= "\n";
2421
2422     return $raw;
2423 };
2424
2425 my $format_aliases = sub {
2426     my ($aliases) = @_;
2427
2428     my $raw = '';
2429
2430     $raw .= "[ALIASES]\n\n";
2431     foreach my $k (keys %$aliases) {
2432         my $e = $aliases->{$k};
2433         $raw .= "$e->{name} $e->{cidr}";
2434         $raw .= " # " . encode('utf8', $e->{comment})
2435             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2436         $raw .= "\n";
2437     }
2438     $raw .= "\n";
2439
2440     return $raw;
2441 };
2442
2443 my $format_ipsets = sub {
2444     my ($fw_conf) = @_;
2445
2446     my $raw = '';
2447
2448     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2449         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2450             my $utf8comment = encode('utf8', $comment);
2451             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2452         } else {
2453             $raw .= "[IPSET $ipset]\n\n";
2454         }
2455         my $options = $fw_conf->{ipset}->{$ipset};
2456
2457         my $nethash = {};
2458         foreach my $entry (@$options) {
2459             $nethash->{$entry->{cidr}} = $entry;
2460         }
2461
2462         foreach my $cidr (sort keys %$nethash) {
2463             my $entry = $nethash->{$cidr};
2464             my $line = $entry->{nomatch} ? '!' : '';
2465             $line .= $entry->{cidr};
2466             $line .= " # " . encode('utf8', $entry->{comment})
2467                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2468             $raw .= "$line\n";
2469         }
2470
2471         $raw .= "\n";
2472     }
2473
2474     return $raw;
2475 };
2476
2477 sub save_vmfw_conf {
2478     my ($vmid, $vmfw_conf) = @_;
2479
2480     my $raw = '';
2481
2482     my $options = $vmfw_conf->{options};
2483     $raw .= &$format_options($options) if scalar(keys %$options);
2484
2485     my $aliases = $vmfw_conf->{aliases};
2486     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2487
2488     $raw .= &$format_ipsets($vmfw_conf);
2489
2490     my $rules = $vmfw_conf->{rules} || [];
2491     if (scalar(@$rules)) {
2492         $raw .= "[RULES]\n\n";
2493         $raw .= &$format_rules($rules, 1);
2494         $raw .= "\n";
2495     }
2496
2497     my $filename = "/etc/pve/firewall/$vmid.fw";
2498     PVE::Tools::file_set_contents($filename, $raw);
2499 }
2500
2501 sub read_vm_firewall_configs {
2502     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2503
2504     my $vmfw_configs = {};
2505
2506     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2507         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2508         next if !$vmfw_conf->{options}; # skip if file does not exists
2509         $vmfw_configs->{$vmid} = $vmfw_conf;
2510     }
2511     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2512         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2513         next if !$vmfw_conf->{options}; # skip if file does not exists
2514         $vmfw_configs->{$vmid} = $vmfw_conf;
2515     }
2516
2517     return $vmfw_configs;
2518 }
2519
2520 sub get_option_log_level {
2521     my ($options, $k) = @_;
2522
2523     my $v = $options->{$k};
2524     $v = $default_log_level if !defined($v);
2525
2526     return undef if $v eq '' || $v eq 'nolog';
2527
2528     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2529
2530     return $v if ($v >= 0) && ($v <= 7);
2531
2532     warn "unknown log level ($k = '$v')\n";
2533
2534     return undef;
2535 }
2536
2537 sub generate_std_chains {
2538     my ($ruleset, $options) = @_;
2539
2540     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2541
2542     # same as shorewall smurflog.
2543     my $chain = 'PVEFW-smurflog';
2544     $pve_std_chains->{$chain} = [];
2545
2546     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2547     push @{$pve_std_chains->{$chain}}, "-j DROP";
2548
2549     # same as shorewall logflags action.
2550     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2551     $chain = 'PVEFW-logflags';
2552     $pve_std_chains->{$chain} = [];
2553
2554     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2555     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2556     push @{$pve_std_chains->{$chain}}, "-j DROP";
2557
2558     foreach my $chain (keys %$pve_std_chains) {
2559         ruleset_create_chain($ruleset, $chain);
2560         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2561             if (ref($rule)) {
2562                 ruleset_generate_rule($ruleset, $chain, $rule);
2563             } else {
2564                 ruleset_addrule($ruleset, $chain, $rule);
2565             }
2566         }
2567     }
2568 }
2569
2570 sub generate_ipset_chains {
2571     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2572
2573     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2574         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2575         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2576     }
2577 }
2578
2579 sub generate_ipset {
2580     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2581
2582     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2583
2584     my $hashsize = scalar(@$options);
2585     if ($hashsize <= 64) {
2586         $hashsize = 64;
2587     } else {
2588         $hashsize = round_powerof2($hashsize);
2589     }
2590
2591     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2592
2593     # remove duplicates
2594     my $nethash = {};
2595     foreach my $entry (@$options) {
2596         my $cidr = $entry->{cidr};
2597         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2598             my $alias = lc($cidr);
2599             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2600             $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2601             if ($e) {
2602                 $entry->{cidr} = $e->{cidr};
2603                 $nethash->{$entry->{cidr}} = $entry;
2604             } else {
2605                 warn "no such alias '$cidr'\n";
2606             }
2607         } else {
2608             $nethash->{$entry->{cidr}} = $entry;
2609         }
2610     }
2611
2612     foreach my $cidr (sort keys %$nethash) {
2613         my $entry = $nethash->{$cidr};
2614
2615         my $cmd = "add $name $cidr";
2616         if ($entry->{nomatch}) {
2617             if ($feature_ipset_nomatch) {
2618                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2619             } else {
2620                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2621             }
2622         } else {
2623             push @{$ipset_ruleset->{$name}}, $cmd;
2624         }
2625     }
2626 }
2627
2628 sub round_powerof2 {
2629     my ($int) = @_;
2630
2631     $int--;
2632     $int |= $int >> $_ foreach (1,2,4,8,16);
2633     return ++$int;
2634 }
2635
2636 sub load_clusterfw_conf {
2637     my ($filename, $verbose) = @_;
2638
2639     $filename = $clusterfw_conf_filename if !defined($filename);
2640
2641     my $cluster_conf = {};
2642     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2643         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2644     }
2645
2646     return $cluster_conf;
2647 }
2648
2649 sub save_clusterfw_conf {
2650     my ($cluster_conf) = @_;
2651
2652     my $raw = '';
2653
2654     my $options = $cluster_conf->{options};
2655     $raw .= &$format_options($options) if scalar(keys %$options);
2656
2657     my $aliases = $cluster_conf->{aliases};
2658     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2659
2660     $raw .= &$format_ipsets($cluster_conf);
2661
2662     my $rules = $cluster_conf->{rules};
2663     if (scalar(@$rules)) {
2664         $raw .= "[RULES]\n\n";
2665         $raw .= &$format_rules($rules, 1);
2666         $raw .= "\n";
2667     }
2668
2669     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2670         my $rules = $cluster_conf->{groups}->{$group};
2671         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2672             my $utf8comment = encode('utf8', $comment);
2673             $raw .= "[group $group] # $utf8comment\n\n";
2674         } else {
2675             $raw .= "[group $group]\n\n";
2676         }
2677
2678         $raw .= &$format_rules($rules, 0);
2679         $raw .= "\n";
2680     }
2681
2682     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2683 }
2684
2685 sub load_hostfw_conf {
2686     my ($cluster_conf, $filename, $verbose) = @_;
2687
2688     $filename = $hostfw_conf_filename if !defined($filename);
2689
2690     my $hostfw_conf = {};
2691     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2692         $hostfw_conf = parse_host_fw_rules($filename, $fh, $cluster_conf, $verbose);
2693     }
2694     return $hostfw_conf;
2695 }
2696
2697 sub save_hostfw_conf {
2698     my ($hostfw_conf) = @_;
2699
2700     my $raw = '';
2701
2702     my $options = $hostfw_conf->{options};
2703     $raw .= &$format_options($options) if scalar(keys %$options);
2704
2705     my $rules = $hostfw_conf->{rules};
2706     if (scalar(@$rules)) {
2707         $raw .= "[RULES]\n\n";
2708         $raw .= &$format_rules($rules, 1);
2709         $raw .= "\n";
2710     }
2711
2712     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2713 }
2714
2715 sub compile {
2716     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2717
2718     my $vmfw_configs;
2719
2720     if ($vmdata) { # test mode
2721         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2722         my $filename = "$testdir/cluster.fw";
2723         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2724
2725         $filename = "$testdir/host.fw";
2726         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2727
2728         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2729     } else { # normal operation
2730         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2731
2732         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2733
2734         $vmdata = read_local_vm_config();
2735         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2736     }
2737
2738     $cluster_conf->{ipset}->{venet0} = [];
2739     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2740
2741     my $localnet;
2742     if ($cluster_conf->{aliases}->{local_network}) {
2743         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2744     } else {
2745         $localnet = local_network() || '127.0.0.0/8';
2746         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2747     }
2748
2749     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2750
2751     my $ruleset = {};
2752
2753     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2754     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2755
2756     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2757
2758     my $hostfw_options = $hostfw_conf->{options} || {};
2759
2760     # fixme: what log level should we use here?
2761     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2762
2763     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2764
2765
2766     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2767     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2768     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2769
2770     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2771     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2772
2773     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2774
2775     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2776     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2777
2778     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2779     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2780
2781     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2782
2783     generate_std_chains($ruleset, $hostfw_options);
2784
2785     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2786
2787     my $ipset_ruleset = {};
2788
2789     if ($hostfw_enable) {
2790         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2791         warn $@ if $@; # just to be sure - should not happen
2792     }
2793
2794     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2795
2796     # generate firewall rules for QEMU VMs
2797     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2798         eval {
2799             my $conf = $vmdata->{qemu}->{$vmid};
2800             my $vmfw_conf = $vmfw_configs->{$vmid};
2801             return if !$vmfw_conf;
2802             return if !$vmfw_conf->{options}->{enable};
2803
2804             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2805
2806             foreach my $netid (keys %$conf) {
2807                 next if $netid !~ m/^net(\d+)$/;
2808                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2809                 next if !$net->{firewall};
2810                 my $iface = "tap${vmid}i$1";
2811
2812                 my $macaddr = $net->{macaddr};
2813                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2814                                              $vmfw_conf, $vmid, 'IN');
2815                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2816                                              $vmfw_conf, $vmid, 'OUT');
2817             }
2818         };
2819         warn $@ if $@; # just to be sure - should not happen
2820     }
2821
2822     # generate firewall rules for OpenVZ containers
2823     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2824         eval {
2825             my $conf = $vmdata->{openvz}->{$vmid};
2826
2827             my $vmfw_conf = $vmfw_configs->{$vmid};
2828             return if !$vmfw_conf;
2829             return if !$vmfw_conf->{options}->{enable};
2830
2831             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2832
2833             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2834                 my $ip = $conf->{ip_address}->{value};
2835                 $ip =~ s/\s+/,/g;
2836                 parse_address_list($ip); # make sure we have a valid $ip list
2837
2838                 my @ips = split(',', $ip);
2839
2840                 foreach my $singleip (@ips) {
2841                     my $venet0ipset = {};
2842                     $venet0ipset->{cidr} = $singleip;
2843                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2844                 }
2845
2846                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2847                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2848             }
2849
2850             if ($conf->{netif} && $conf->{netif}->{value}) {
2851                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2852                 foreach my $netid (keys %$netif) {
2853                     my $d = $netif->{$netid};
2854
2855                     my $macaddr = $d->{mac};
2856                     my $iface = $d->{host_ifname};
2857                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2858                                                  $vmfw_conf, $vmid, 'IN');
2859                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2860                                                  $vmfw_conf, $vmid, 'OUT');
2861                 }
2862             }
2863         };
2864         warn $@ if $@; # just to be sure - should not happen
2865     }
2866
2867     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2868         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2869     }
2870
2871     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2872
2873     return ($ruleset, $ipset_ruleset);
2874 }
2875
2876 sub get_ruleset_status {
2877     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2878
2879     my $statushash = {};
2880
2881     foreach my $chain (sort keys %$ruleset) {
2882         my $sig = &$digest_fn($ruleset->{$chain});
2883
2884         $statushash->{$chain}->{sig} = $sig;
2885
2886         my $oldsig = $active_chains->{$chain};
2887         if (!defined($oldsig)) {
2888             $statushash->{$chain}->{action} = 'create';
2889         } else {
2890             if ($oldsig eq $sig) {
2891                 $statushash->{$chain}->{action} = 'exists';
2892             } else {
2893                 $statushash->{$chain}->{action} = 'update';
2894             }
2895         }
2896         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2897         foreach my $cmd (@{$ruleset->{$chain}}) {
2898             print "\t$cmd\n" if $verbose;
2899         }
2900     }
2901
2902     foreach my $chain (sort keys %$active_chains) {
2903         if (!defined($ruleset->{$chain})) {
2904             my $sig = $active_chains->{$chain};
2905             $statushash->{$chain}->{action} = 'delete';
2906             $statushash->{$chain}->{sig} = $sig;
2907             print "delete $chain ($sig)\n" if $verbose;
2908         }
2909     }
2910
2911     return $statushash;
2912 }
2913
2914 sub print_sig_rule {
2915     my ($chain, $sig) = @_;
2916
2917     # We just use this to store a SHA1 checksum used to detect changes
2918     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2919 }
2920
2921 sub get_ruleset_cmdlist {
2922     my ($ruleset, $verbose) = @_;
2923
2924     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2925
2926     my ($active_chains, $hooks) = iptables_get_chains();
2927     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2928
2929     # create missing chains first
2930     foreach my $chain (sort keys %$ruleset) {
2931         my $stat = $statushash->{$chain};
2932         die "internal error" if !$stat;
2933         next if $stat->{action} ne 'create';
2934
2935         $cmdlist .= ":$chain - [0:0]\n";
2936     }
2937
2938     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2939         if (!$hooks->{$h}) {
2940             $cmdlist .= "-A $h -j PVEFW-$h\n";
2941         }
2942     }
2943
2944     foreach my $chain (sort keys %$ruleset) {
2945         my $stat = $statushash->{$chain};
2946         die "internal error" if !$stat;
2947
2948         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2949             $cmdlist .= "-F $chain\n";
2950             foreach my $cmd (@{$ruleset->{$chain}}) {
2951                 $cmdlist .= "$cmd\n";
2952             }
2953             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2954         } elsif ($stat->{action} eq 'delete') {
2955             die "internal error"; # this should not happen
2956         } elsif ($stat->{action} eq 'exists') {
2957             # do nothing
2958         } else {
2959             die "internal error - unknown status '$stat->{action}'";
2960         }
2961     }
2962
2963     foreach my $chain (keys %$statushash) {
2964         next if $statushash->{$chain}->{action} ne 'delete';
2965         $cmdlist .= "-F $chain\n";
2966     }
2967     foreach my $chain (keys %$statushash) {
2968         next if $statushash->{$chain}->{action} ne 'delete';
2969         next if $chain eq 'PVEFW-INPUT';
2970         next if $chain eq 'PVEFW-OUTPUT';
2971         next if $chain eq 'PVEFW-FORWARD';
2972         $cmdlist .= "-X $chain\n";
2973     }
2974
2975     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2976
2977     $cmdlist .= "COMMIT\n";
2978
2979     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2980 }
2981
2982 sub get_ipset_cmdlist {
2983     my ($ruleset, $verbose) = @_;
2984
2985     my $cmdlist = "";
2986
2987     my $delete_cmdlist = "";
2988
2989     my $active_chains = ipset_get_chains();
2990     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2991
2992     # remove stale _swap chains
2993     foreach my $chain (keys %$active_chains) {
2994         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2995             $cmdlist .= "destroy $chain\n";
2996         }
2997     }
2998
2999     foreach my $chain (sort keys %$ruleset) {
3000         my $stat = $statushash->{$chain};
3001         die "internal error" if !$stat;
3002
3003         if ($stat->{action} eq 'create') {
3004             foreach my $cmd (@{$ruleset->{$chain}}) {
3005                 $cmdlist .= "$cmd\n";
3006             }
3007         }
3008
3009         if ($stat->{action} eq 'update') {
3010             my $chain_swap = $chain."_swap";
3011
3012             foreach my $cmd (@{$ruleset->{$chain}}) {
3013                 $cmd =~ s/$chain/$chain_swap/;
3014                 $cmdlist .= "$cmd\n";
3015             }
3016             $cmdlist .= "swap $chain_swap $chain\n";
3017             $cmdlist .= "flush $chain_swap\n";
3018             $cmdlist .= "destroy $chain_swap\n";
3019         }
3020
3021     }
3022
3023     foreach my $chain (keys %$statushash) {
3024         next if $statushash->{$chain}->{action} ne 'delete';
3025
3026         $delete_cmdlist .= "flush $chain\n";
3027         $delete_cmdlist .= "destroy $chain\n";
3028     }
3029
3030     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3031
3032     return ($cmdlist, $delete_cmdlist, $changes);
3033 }
3034
3035 sub apply_ruleset {
3036     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3037
3038     enable_bridge_firewall();
3039
3040     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3041         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3042
3043     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3044
3045     if ($verbose) {
3046         if ($ipset_changes) {
3047             print "ipset changes:\n";
3048             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3049             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3050         }
3051
3052         if ($changes) {
3053             print "iptables changes:\n";
3054             print $cmdlist;
3055         }
3056     }
3057
3058     ipset_restore_cmdlist($ipset_create_cmdlist);
3059
3060     iptables_restore_cmdlist($cmdlist);
3061
3062     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3063
3064     # test: re-read status and check if everything is up to date
3065     my $active_chains = iptables_get_chains();
3066     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3067
3068     my $errors;
3069     foreach my $chain (sort keys %$ruleset) {
3070         my $stat = $statushash->{$chain};
3071         if ($stat->{action} ne 'exists') {
3072             warn "unable to update chain '$chain'\n";
3073             $errors = 1;
3074         }
3075     }
3076
3077     die "unable to apply firewall changes\n" if $errors;
3078
3079     update_nf_conntrack_max($hostfw_conf);
3080
3081     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3082
3083 }
3084
3085 sub update_nf_conntrack_max {
3086     my ($hostfw_conf) = @_;
3087
3088     my $max = 65536; # reasonable default
3089
3090     my $options = $hostfw_conf->{options} || {};
3091
3092     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3093         $max = $options->{nf_conntrack_max};
3094         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3095     }
3096
3097     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3098     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3099
3100     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3101
3102     if ($current != $max) {
3103         my $hashsize = int($max/4);
3104         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3105         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3106     }
3107 }
3108
3109 sub update_nf_conntrack_tcp_timeout_established {
3110     my ($hostfw_conf) = @_;
3111
3112     my $options = $hostfw_conf->{options} || {};
3113
3114     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3115
3116     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3117 }
3118
3119 sub remove_pvefw_chains {
3120
3121     my ($chash, $hooks) = iptables_get_chains();
3122     my $cmdlist = "*filter\n";
3123
3124     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3125         if ($hooks->{$h}) {
3126             $cmdlist .= "-D $h -j PVEFW-$h\n";
3127         }
3128     }
3129
3130     foreach my $chain (keys %$chash) {
3131         $cmdlist .= "-F $chain\n";
3132     }
3133
3134     foreach my $chain (keys %$chash) {
3135         $cmdlist .= "-X $chain\n";
3136     }
3137     $cmdlist .= "COMMIT\n";
3138
3139     iptables_restore_cmdlist($cmdlist);
3140 }
3141
3142 sub init {
3143     my $cluster_conf = load_clusterfw_conf();
3144     my $cluster_options = $cluster_conf->{options};
3145     my $enable = $cluster_options->{enable};
3146
3147     return if !$enable;
3148
3149     # load required modules here
3150 }
3151
3152 sub update {
3153     my $code = sub {
3154
3155         my $cluster_conf = load_clusterfw_conf();
3156         my $cluster_options = $cluster_conf->{options};
3157
3158         my $enable = $cluster_options->{enable};
3159
3160         die "Firewall is disabled - cannot start\n" if !$enable;
3161
3162         if (!$enable) {
3163             PVE::Firewall::remove_pvefw_chains();
3164             return;
3165         }
3166
3167         my $hostfw_conf = load_hostfw_conf();
3168
3169         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3170
3171         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3172     };
3173
3174     run_locked($code);
3175 }
3176
3177 1;