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 $pvefw_conf_dir = "/etc/pve/firewall";
  23 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  24
  25 # dynamically include PVE::QemuServer and PVE::OpenVZ
  26 # to avoid dependency problems
  27 my $have_qemu_server;
  28 eval {
  29     require PVE::QemuServer;
  30     $have_qemu_server = 1;
  31 };
  32
  33 my $have_pve_manager;
  34 eval {
  35     require PVE::OpenVZ;
  36     $have_pve_manager = 1;
  37 };
  38
  39 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  40 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  42
  43 my $max_alias_name_length = 64;
  44 my $max_ipset_name_length = 64;
  45 my $max_group_name_length = 20;
  46
  47 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  48 sub pve_verify_ipv4_or_cidr {
  49     my ($cidr, $noerr) = @_;
  50
  51     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  52         return $cidr if Net::IP->new($cidr);
  53         return undef if $noerr;
  54         die Net::IP::Error() . "\n";
  55     }
  56     return undef if $noerr;
  57     die "value does not look like a valid IP address or CIDR network\n";
  58 }
  59
  60 PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
  61 sub pve_verify_ipv4_or_cidr_or_alias {
  62     my ($cidr, $noerr) = @_;
  63
  64     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  65
  66     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  67         return $cidr if Net::IP->new($cidr);
  68         return undef if $noerr;
  69         die Net::IP::Error() . "\n";
  70     }
  71     return undef if $noerr;
  72     die "value does not look like a valid IP address or CIDR network\n";
  73 }
  74
  75 PVE::JSONSchema::register_standard_option('ipset-name', {
  76     description => "IP set name.",
  77     type => 'string',
  78     pattern => $ipset_name_pattern,
  79     minLength => 2,
  80     maxLength => $max_ipset_name_length,
  81 });
  82
  83 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  84     description => "Alias name.",
  85     type => 'string',
  86     pattern => $ip_alias_pattern,
  87     minLength => 2,
  88     maxLength => $max_alias_name_length,
  89 });
  90
  91 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  92     description => "Log level.",
  93     type => 'string',
  94     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  95     optional => 1,
  96 });
  97
  98 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  99     description => "Security Group name.",
 100     type => 'string',
 101     pattern => $security_group_name_pattern,
 102     minLength => 2,
 103     maxLength => $max_group_name_length,
 104 });
 105
 106 my $feature_ipset_nomatch = 0;
 107 eval  {
 108     my (undef, undef, $release) = POSIX::uname();
 109     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 110         my ($major, $minor) = ($1, $2);
 111         $feature_ipset_nomatch = 1 if ($major > 3) ||
 112             ($major == 3 && $minor >= 7);
 113     }
 114
 115 };
 116
 117 use Data::Dumper;
 118
 119 my $nodename = PVE::INotify::nodename();
 120
 121 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 122
 123 my $default_log_level = 'nolog'; # avoid logs by default
 124
 125 my $log_level_hash = {
 126     debug => 7,
 127     info => 6,
 128     notice => 5,
 129     warning => 4,
 130     err => 3,
 131     crit => 2,
 132     alert => 1,
 133     emerg => 0,
 134 };
 135
 136 # imported/converted from: /usr/share/shorewall/macro.*
 137 my $pve_fw_macros = {
 138     'Amanda' => [
 139         "Amanda Backup",
 140         { action => 'PARAM', proto => 'udp', dport => '10080' },
 141         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 142     ],
 143     'Auth' => [
 144         "Auth (identd) traffic",
 145         { action => 'PARAM', proto => 'tcp', dport => '113' },
 146     ],
 147     'BGP' => [
 148         "Border Gateway Protocol traffic",
 149         { action => 'PARAM', proto => 'tcp', dport => '179' },
 150     ],
 151     'BitTorrent' => [
 152         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 153         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 154         { action => 'PARAM', proto => 'udp', dport => '6881' },
 155     ],
 156     'BitTorrent32' => [
 157         "BitTorrent traffic for BitTorrent 3.2 and later",
 158         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 159         { action => 'PARAM', proto => 'udp', dport => '6881' },
 160     ],
 161     'CVS' => [
 162         "Concurrent Versions System pserver traffic",
 163         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 164     ],
 165     'Citrix' => [
 166         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 167         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 168         { action => 'PARAM', proto => 'udp', dport => '1604' },
 169         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 170     ],
 171     'DAAP' => [
 172         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 173         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 174         { action => 'PARAM', proto => 'udp', dport => '3689' },
 175     ],
 176     'DCC' => [
 177         "Distributed Checksum Clearinghouse spam filtering mechanism",
 178         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 179     ],
 180     'DHCPfwd' => [
 181         "Forwarded DHCP traffic",
 182         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 183     ],
 184     'DNS' => [
 185         "Domain Name System traffic (upd and tcp)",
 186         { action => 'PARAM', proto => 'udp', dport => '53' },
 187         { action => 'PARAM', proto => 'tcp', dport => '53' },
 188     ],
 189     'Distcc' => [
 190         "Distributed Compiler service",
 191         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 192     ],
 193     'FTP' => [
 194         "File Transfer Protocol",
 195         { action => 'PARAM', proto => 'tcp', dport => '21' },
 196     ],
 197     'Finger' => [
 198         "Finger protocol (RFC 742)",
 199         { action => 'PARAM', proto => 'tcp', dport => '79' },
 200     ],
 201     'GNUnet' => [
 202         "GNUnet secure peer-to-peer networking traffic",
 203         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 204         { action => 'PARAM', proto => 'udp', dport => '2086' },
 205         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 206         { action => 'PARAM', proto => 'udp', dport => '1080' },
 207     ],
 208     'GRE' => [
 209         "Generic Routing Encapsulation tunneling protocol",
 210         { action => 'PARAM', proto => '47' },
 211     ],
 212     'Git' => [
 213         "Git distributed revision control traffic",
 214         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 215     ],
 216     'HKP' => [
 217         "OpenPGP HTTP keyserver protocol traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 219     ],
 220     'HTTP' => [
 221         "Hypertext Transfer Protocol (WWW)",
 222         { action => 'PARAM', proto => 'tcp', dport => '80' },
 223     ],
 224     'HTTPS' => [
 225         "Hypertext Transfer Protocol (WWW) over SSL",
 226         { action => 'PARAM', proto => 'tcp', dport => '443' },
 227     ],
 228     'ICPV2' => [
 229         "Internet Cache Protocol V2 (Squid) traffic",
 230         { action => 'PARAM', proto => 'udp', dport => '3130' },
 231     ],
 232     'ICQ' => [
 233         "AOL Instant Messenger traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 235     ],
 236     'IMAP' => [
 237         "Internet Message Access Protocol",
 238         { action => 'PARAM', proto => 'tcp', dport => '143' },
 239     ],
 240     'IMAPS' => [
 241         "Internet Message Access Protocol over SSL",
 242         { action => 'PARAM', proto => 'tcp', dport => '993' },
 243     ],
 244     'IPIP' => [
 245         "IPIP capsulation traffic",
 246         { action => 'PARAM', proto => '94' },
 247     ],
 248     'IPsec' => [
 249         "IPsec traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 251         { action => 'PARAM', proto => '50' },
 252     ],
 253     'IPsecah' => [
 254         "IPsec authentication (AH) traffic",
 255         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 256         { action => 'PARAM', proto => '51' },
 257     ],
 258     'IPsecnat' => [
 259         "IPsec traffic and Nat-Traversal",
 260         { action => 'PARAM', proto => 'udp', dport => '500' },
 261         { action => 'PARAM', proto => 'udp', dport => '4500' },
 262         { action => 'PARAM', proto => '50' },
 263     ],
 264     'IRC' => [
 265         "Internet Relay Chat traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 267     ],
 268     'Jetdirect' => [
 269         "HP Jetdirect printing",
 270         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 271     ],
 272     'L2TP' => [
 273         "Layer 2 Tunneling Protocol traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '1701' },
 275     ],
 276     'LDAP' => [
 277         "Lightweight Directory Access Protocol traffic",
 278         { action => 'PARAM', proto => 'tcp', dport => '389' },
 279     ],
 280     'LDAPS' => [
 281         "Secure Lightweight Directory Access Protocol traffic",
 282         { action => 'PARAM', proto => 'tcp', dport => '636' },
 283     ],
 284     'MSNP' => [
 285         "Microsoft Notification Protocol",
 286         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 287     ],
 288     'MSSQL' => [
 289         "Microsoft SQL Server",
 290         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 291     ],
 292     'Mail' => [
 293         "Mail traffic (SMTP, SMTPS, Submission)",
 294         { action => 'PARAM', proto => 'tcp', dport => '25' },
 295         { action => 'PARAM', proto => 'tcp', dport => '465' },
 296         { action => 'PARAM', proto => 'tcp', dport => '587' },
 297     ],
 298     'Munin' => [
 299         "Munin networked resource monitoring traffic",
 300         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 301     ],
 302     'MySQL' => [
 303         "MySQL server",
 304         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 305     ],
 306     'NNTP' => [
 307         "NNTP traffic (Usenet).",
 308         { action => 'PARAM', proto => 'tcp', dport => '119' },
 309     ],
 310     'NNTPS' => [
 311         "Encrypted NNTP traffic (Usenet)",
 312         { action => 'PARAM', proto => 'tcp', dport => '563' },
 313     ],
 314     'NTP' => [
 315         "Network Time Protocol (ntpd)",
 316         { action => 'PARAM', proto => 'udp', dport => '123' },
 317     ],
 318     'OSPF' => [
 319         "OSPF multicast traffic",
 320         { action => 'PARAM', proto => '89' },
 321     ],
 322     'OpenVPN' => [
 323         "OpenVPN traffic",
 324         { action => 'PARAM', proto => 'udp', dport => '1194' },
 325     ],
 326     'PCA' => [
 327         "Symantec PCAnywere (tm)",
 328         { action => 'PARAM', proto => 'udp', dport => '5632' },
 329         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 330     ],
 331     'POP3' => [
 332         "POP3 traffic",
 333         { action => 'PARAM', proto => 'tcp', dport => '110' },
 334     ],
 335     'POP3S' => [
 336         "Encrypted POP3 traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '995' },
 338     ],
 339     'PPtP' => [
 340         "Point-to-Point Tunneling Protocol",
 341         { action => 'PARAM', proto => '47' },
 342         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 343     ],
 344     'Ping' => [
 345         "ICMP echo request",
 346         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 347     ],
 348     'PostgreSQL' => [
 349         "PostgreSQL server",
 350         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 351     ],
 352     'Printer' => [
 353         "Line Printer protocol printing",
 354         { action => 'PARAM', proto => 'tcp', dport => '515' },
 355     ],
 356     'RDP' => [
 357         "Microsoft Remote Desktop Protocol traffic",
 358         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 359     ],
 360     'RIP' => [
 361         "Routing Information Protocol (bidirectional)",
 362         { action => 'PARAM', proto => 'udp', dport => '520' },
 363     ],
 364     'RNDC' => [
 365         "BIND remote management protocol",
 366         { action => 'PARAM', proto => 'tcp', dport => '953' },
 367     ],
 368     'Razor' => [
 369         "Razor Antispam System",
 370         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 371     ],
 372     'Rdate' => [
 373         "Remote time retrieval (rdate)",
 374         { action => 'PARAM', proto => 'tcp', dport => '37' },
 375     ],
 376     'Rsync' => [
 377         "Rsync server",
 378         { action => 'PARAM', proto => 'tcp', dport => '873' },
 379     ],
 380     'SANE' => [
 381         "SANE network scanning",
 382         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 383     ],
 384     'SMB' => [
 385         "Microsoft SMB traffic",
 386         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 387         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 388         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 389         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 390     ],
 391     'SMBswat' => [
 392         "Samba Web Administration Tool",
 393         { action => 'PARAM', proto => 'tcp', dport => '901' },
 394     ],
 395     'SMTP' => [
 396         "Simple Mail Transfer Protocol",
 397         { action => 'PARAM', proto => 'tcp', dport => '25' },
 398     ],
 399     'SMTPS' => [
 400         "Encrypted Simple Mail Transfer Protocol",
 401         { action => 'PARAM', proto => 'tcp', dport => '465' },
 402     ],
 403     'SNMP' => [
 404         "Simple Network Management Protocol",
 405         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 406         { action => 'PARAM', proto => 'tcp', dport => '161' },
 407     ],
 408     'SPAMD' => [
 409         "Spam Assassin SPAMD traffic",
 410         { action => 'PARAM', proto => 'tcp', dport => '783' },
 411     ],
 412     'SSH' => [
 413         "Secure shell traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '22' },
 415     ],
 416     'SVN' => [
 417         "Subversion server (svnserve)",
 418         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 419     ],
 420     'SixXS' => [
 421         "SixXS IPv6 Deployment and Tunnel Broker",
 422         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 423         { action => 'PARAM', proto => 'udp', dport => '3740' },
 424         { action => 'PARAM', proto => '41' },
 425         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 426     ],
 427     'Squid' => [
 428         "Squid web proxy traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 430     ],
 431     'Submission' => [
 432         "Mail message submission traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '587' },
 434     ],
 435     'Syslog' => [
 436         "Syslog protocol (RFC 5424) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '514' },
 438         { action => 'PARAM', proto => 'tcp', dport => '514' },
 439     ],
 440     'TFTP' => [
 441         "Trivial File Transfer Protocol traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '69' },
 443     ],
 444     'Telnet' => [
 445         "Telnet traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '23' },
 447     ],
 448     'Telnets' => [
 449         "Telnet over SSL",
 450         { action => 'PARAM', proto => 'tcp', dport => '992' },
 451     ],
 452     'Time' => [
 453         "RFC 868 Time protocol",
 454         { action => 'PARAM', proto => 'tcp', dport => '37' },
 455     ],
 456     'Trcrt' => [
 457         "Traceroute (for up to 30 hops) traffic",
 458         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 459         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 460     ],
 461     'VNC' => [
 462         "VNC traffic for VNC display's 0 - 99",
 463         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 464     ],
 465     'VNCL' => [
 466         "VNC traffic from Vncservers to Vncviewers in listen mode",
 467         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 468     ],
 469     'Web' => [
 470         "WWW traffic (HTTP and HTTPS)",
 471         { action => 'PARAM', proto => 'tcp', dport => '80' },
 472         { action => 'PARAM', proto => 'tcp', dport => '443' },
 473     ],
 474     'Webcache' => [
 475         "Web Cache/Proxy traffic (port 8080)",
 476         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 477     ],
 478     'Webmin' => [
 479         "Webmin traffic",
 480         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 481     ],
 482     'Whois' => [
 483         "Whois (nicname, RFC 3912) traffic",
 484         { action => 'PARAM', proto => 'tcp', dport => '43' },
 485     ],
 486 };
 487
 488 my $pve_fw_parsed_macros;
 489 my $pve_fw_macro_descr;
 490 my $pve_fw_preferred_macro_names = {};
 491
 492 my $pve_std_chains = {
 493     'PVEFW-SET-ACCEPT-MARK' => [
 494         "-j MARK --set-mark 1",
 495     ],
 496     'PVEFW-DropBroadcast' => [
 497         # same as shorewall 'Broadcast'
 498         # simply DROP BROADCAST/MULTICAST/ANYCAST
 499         # we can use this to reduce logging
 500         { action => 'DROP', dsttype => 'BROADCAST' },
 501         { action => 'DROP', dsttype => 'MULTICAST' },
 502         { action => 'DROP', dsttype => 'ANYCAST' },
 503         { action => 'DROP', dest => '224.0.0.0/4' },
 504     ],
 505     'PVEFW-reject' => [
 506         # same as shorewall 'reject'
 507         { action => 'DROP', dsttype => 'BROADCAST' },
 508         { action => 'DROP', source => '224.0.0.0/4' },
 509         { action => 'DROP', proto => 'icmp' },
 510         "-p tcp -j REJECT --reject-with tcp-reset",
 511         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 512         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 513         "-j REJECT --reject-with icmp-host-prohibited",
 514     ],
 515     'PVEFW-Drop' => [
 516         # same as shorewall 'Drop', which is equal to DROP,
 517         # but REJECT/DROP some packages to reduce logging,
 518         # and ACCEPT critical ICMP types
 519         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 520         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 521         { action => 'PVEFW-DropBroadcast' },
 522         # ACCEPT critical ICMP types
 523         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 525         # Drop packets with INVALID state
 526         "-m conntrack --ctstate INVALID -j DROP",
 527         # Drop Microsoft SMB noise
 528         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 529         { action => 'DROP', proto => 'udp', dport => '137:139'},
 530         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 531         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 532         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 533         # Drop new/NotSyn traffic so that it doesn't get logged
 534         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 535         # Drop DNS replies
 536         { action => 'DROP', proto => 'udp', sport => 53 },
 537     ],
 538     'PVEFW-Reject' => [
 539         # same as shorewall 'Reject', which is equal to Reject,
 540         # but REJECT/DROP some packages to reduce logging,
 541         # and ACCEPT critical ICMP types
 542         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 543         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 544         { action => 'PVEFW-DropBroadcast' },
 545         # ACCEPT critical ICMP types
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 548         # Drop packets with INVALID state
 549         "-m conntrack --ctstate INVALID -j DROP",
 550         # Drop Microsoft SMB noise
 551         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 554         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 555         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 556         # Drop new/NotSyn traffic so that it doesn't get logged
 557         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 558         # Drop DNS replies
 559         { action => 'DROP', proto => 'udp', sport => 53 },
 560     ],
 561     'PVEFW-tcpflags' => [
 562         # same as shorewall tcpflags action.
 563         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 564         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 568         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 569     ],
 570     'PVEFW-smurfs' => [
 571         # same as shorewall smurfs action
 572         # Filter packets for smurfs (packets with a broadcast address as the source).
 573         "-s 0.0.0.0/32 -j RETURN",
 574         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 575         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 576     ],
 577 };
 578
 579 # iptables -p icmp -h
 580 my $icmp_type_names = {
 581     any => 1,
 582     'echo-reply' => 1,
 583     'destination-unreachable' => 1,
 584     'network-unreachable' => 1,
 585     'host-unreachable' => 1,
 586     'protocol-unreachable' => 1,
 587     'port-unreachable' => 1,
 588     'fragmentation-needed' => 1,
 589     'source-route-failed' => 1,
 590     'network-unknown' => 1,
 591     'host-unknown' => 1,
 592     'network-prohibited' => 1,
 593     'host-prohibited' => 1,
 594     'TOS-network-unreachable' => 1,
 595     'TOS-host-unreachable' => 1,
 596     'communication-prohibited' => 1,
 597     'host-precedence-violation' => 1,
 598     'precedence-cutoff' => 1,
 599     'source-quench' => 1,
 600     'redirect' => 1,
 601     'network-redirect' => 1,
 602     'host-redirect' => 1,
 603     'TOS-network-redirect' => 1,
 604     'TOS-host-redirect' => 1,
 605     'echo-request' => 1,
 606     'router-advertisement' => 1,
 607     'router-solicitation' => 1,
 608     'time-exceeded' => 1,
 609     'ttl-zero-during-transit' => 1,
 610     'ttl-zero-during-reassembly' => 1,
 611     'parameter-problem' => 1,
 612     'ip-header-bad' => 1,
 613     'required-option-missing' => 1,
 614     'timestamp-request' => 1,
 615     'timestamp-reply' => 1,
 616     'address-mask-request' => 1,
 617     'address-mask-reply' => 1,
 618 };
 619
 620 sub init_firewall_macros {
 621
 622     $pve_fw_parsed_macros = {};
 623
 624     foreach my $k (keys %$pve_fw_macros) {
 625         my $lc_name = lc($k);
 626         my $macro = $pve_fw_macros->{$k};
 627         if (!ref($macro->[0])) {
 628             $pve_fw_macro_descr->{$k} = shift @$macro;
 629         }
 630         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 631         $pve_fw_parsed_macros->{$k} = $macro;
 632     }
 633 }
 634
 635 init_firewall_macros();
 636
 637 sub get_macros {
 638     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 639 }
 640
 641 my $etc_services;
 642
 643 sub get_etc_services {
 644
 645     return $etc_services if $etc_services;
 646
 647     my $filename = "/etc/services";
 648
 649     my $fh = IO::File->new($filename, O_RDONLY);
 650     if (!$fh) {
 651         warn "unable to read '$filename' - $!\n";
 652         return {};
 653     }
 654
 655     my $services = {};
 656
 657     while (my $line = <$fh>) {
 658         chomp ($line);
 659         next if $line =~m/^#/;
 660         next if ($line =~m/^\s*$/);
 661
 662         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 663             $services->{byid}->{$2}->{name} = $1;
 664             $services->{byid}->{$2}->{port} = $2;
 665             $services->{byid}->{$2}->{$3} = 1;
 666             $services->{byname}->{$1} = $services->{byid}->{$2};
 667         }
 668     }
 669
 670     close($fh);
 671
 672     $etc_services = $services;
 673
 674
 675     return $etc_services;
 676 }
 677
 678 my $etc_protocols;
 679
 680 sub get_etc_protocols {
 681     return $etc_protocols if $etc_protocols;
 682
 683     my $filename = "/etc/protocols";
 684
 685     my $fh = IO::File->new($filename, O_RDONLY);
 686     if (!$fh) {
 687         warn "unable to read '$filename' - $!\n";
 688         return {};
 689     }
 690
 691     my $protocols = {};
 692
 693     while (my $line = <$fh>) {
 694         chomp ($line);
 695         next if $line =~m/^#/;
 696         next if ($line =~m/^\s*$/);
 697
 698         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 699             $protocols->{byid}->{$2}->{name} = $1;
 700             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 701         }
 702     }
 703
 704     close($fh);
 705
 706     $etc_protocols = $protocols;
 707
 708     return $etc_protocols;
 709 }
 710
 711 my $ipv4_mask_hash_localnet = {
 712     '255.255.0.0' => 16,
 713     '255.255.128.0' => 17,
 714     '255.255.192.0' => 18,
 715     '255.255.224.0' => 19,
 716     '255.255.240.0' => 20,
 717     '255.255.248.0' => 21,
 718     '255.255.252.0' => 22,
 719     '255.255.254.0' => 23,
 720     '255.255.255.0' => 24,
 721     '255.255.255.128' => 25,
 722     '255.255.255.192' => 26,
 723     '255.255.255.224' => 27,
 724     '255.255.255.240' => 28,
 725     '255.255.255.248' => 29,
 726     '255.255.255.252' => 30,
 727 };
 728
 729 my $__local_network;
 730
 731 sub local_network {
 732     my ($new_value) = @_;
 733
 734     $__local_network = $new_value if defined($new_value);
 735
 736     return $__local_network if defined($__local_network);
 737
 738     eval {
 739         my $nodename = PVE::INotify::nodename();
 740
 741         my $ip = PVE::Cluster::remote_node_ip($nodename);
 742
 743         my $testip = Net::IP->new($ip);
 744
 745         my $routes = PVE::ProcFSTools::read_proc_net_route();
 746         foreach my $entry (@$routes) {
 747             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 748             next if !defined($mask);
 749             return if $mask eq '0.0.0.0';
 750             my $cidr = "$entry->{dest}/$mask";
 751             my $testnet = Net::IP->new($cidr);
 752             if ($testnet->overlaps($testip)) {
 753                 $__local_network = $cidr;
 754                 return;
 755             }
 756         }
 757     };
 758     warn $@ if $@;
 759
 760     return $__local_network;
 761 }
 762
 763 my $max_iptables_ipset_name_length = 27;
 764
 765 sub compute_ipset_chain_name {
 766     my ($vmid, $ipset_name) = @_;
 767
 768     $vmid = 0 if !defined($vmid);
 769
 770     my $id = "$vmid-${ipset_name}";
 771
 772
 773     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 774         $id = PVE::Tools::fnv31a_hex($id);
 775     }
 776
 777     return "PVEFW-$id";
 778 }
 779
 780 sub compute_ipfilter_ipset_name {
 781     my ($iface) = @_;
 782
 783     return "ipfilter-$iface";
 784 }
 785
 786 sub parse_address_list {
 787     my ($str) = @_;
 788
 789     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 790         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 791         return;
 792     }
 793
 794     if ($str =~ m/^${ip_alias_pattern}$/) {
 795         die "alias name too long\n" if length($str) > $max_alias_name_length;
 796         return;
 797     }
 798
 799     my $count = 0;
 800     my $iprange = 0;
 801     foreach my $elem (split(/,/, $str)) {
 802         $count++;
 803         if (!Net::IP->new($elem)) {
 804             my $err = Net::IP::Error();
 805             die "invalid IP address: $err\n";
 806         }
 807         $iprange = 1 if $elem =~ m/-/;
 808     }
 809
 810     die "you can use a range in a list\n" if $iprange && $count > 1;
 811 }
 812
 813 sub parse_port_name_number_or_range {
 814     my ($str) = @_;
 815
 816     my $services = PVE::Firewall::get_etc_services();
 817     my $count = 0;
 818     my $icmp_port = 0;
 819
 820     foreach my $item (split(/,/, $str)) {
 821         $count++;
 822         if ($item =~ m/^(\d+):(\d+)$/) {
 823             my ($port1, $port2) = ($1, $2);
 824             die "invalid port '$port1'\n" if $port1 > 65535;
 825             die "invalid port '$port2'\n" if $port2 > 65535;
 826         } elsif ($item =~ m/^(\d+)$/) {
 827             my $port = $1;
 828             die "invalid port '$port'\n" if $port > 65535;
 829         } else {
 830             if ($icmp_type_names->{$item}) {
 831                 $icmp_port = 1;
 832             } else {
 833                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 834             }
 835         }
 836     }
 837
 838     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 839
 840     return $count;
 841 }
 842
 843 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 844 sub pve_fw_verify_port_spec {
 845    my ($portstr) = @_;
 846
 847    parse_port_name_number_or_range($portstr);
 848
 849    return $portstr;
 850 }
 851
 852 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 853 sub pve_fw_verify_v4addr_spec {
 854    my ($list) = @_;
 855
 856    parse_address_list($list);
 857
 858    return $list;
 859 }
 860
 861 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 862 sub pve_fw_verify_protocol_spec {
 863    my ($proto) = @_;
 864
 865    my $protocols = get_etc_protocols();
 866
 867    die "unknown protocol '$proto'\n" if $proto &&
 868        !(defined($protocols->{byname}->{$proto}) ||
 869          defined($protocols->{byid}->{$proto}));
 870
 871    return $proto;
 872 }
 873
 874
 875 # helper function for API
 876
 877 sub copy_opject_with_digest {
 878     my ($object) = @_;
 879
 880     my $sha = Digest::SHA->new('sha1');
 881
 882     my $res = {};
 883     foreach my $k (sort keys %$object) {
 884         my $v = $object->{$k};
 885         next if !defined($v);
 886         $res->{$k} = $v;
 887         $sha->add($k, ':', $v, "\n");
 888     }
 889
 890     my $digest = $sha->hexdigest;
 891
 892     $res->{digest} = $digest;
 893
 894     return wantarray ? ($res, $digest) : $res;
 895 }
 896
 897 sub copy_list_with_digest {
 898     my ($list) = @_;
 899
 900     my $sha = Digest::SHA->new('sha1');
 901
 902     my $res = [];
 903     foreach my $entry (@$list) {
 904         my $data = {};
 905         foreach my $k (sort keys %$entry) {
 906             my $v = $entry->{$k};
 907             next if !defined($v);
 908             $data->{$k} = $v;
 909             # Note: digest ignores refs ($rule->{errors})
 910             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 911         }
 912         push @$res, $data;
 913     }
 914
 915     my $digest = $sha->hexdigest;
 916
 917     foreach my $entry (@$res) {
 918         $entry->{digest} = $digest;
 919     }
 920
 921     return wantarray ? ($res, $digest) : $res;
 922 }
 923
 924 my $rule_properties = {
 925     pos => {
 926         description => "Update rule at position <pos>.",
 927         type => 'integer',
 928         minimum => 0,
 929         optional => 1,
 930     },
 931     digest => get_standard_option('pve-config-digest'),
 932     type => {
 933         type => 'string',
 934         optional => 1,
 935         enum => ['in', 'out', 'group'],
 936     },
 937     action => {
 938         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 939         type => 'string',
 940         optional => 1,
 941         pattern => $security_group_name_pattern,
 942         maxLength => 20,
 943         minLength => 2,
 944     },
 945     macro => {
 946         type => 'string',
 947         optional => 1,
 948         maxLength => 128,
 949     },
 950     iface => get_standard_option('pve-iface', { optional => 1 }),
 951     source => {
 952         type => 'string', format => 'pve-fw-v4addr-spec',
 953         optional => 1,
 954     },
 955     dest => {
 956         type => 'string', format => 'pve-fw-v4addr-spec',
 957         optional => 1,
 958     },
 959     proto => {
 960         type => 'string', format => 'pve-fw-protocol-spec',
 961         optional => 1,
 962     },
 963     enable => {
 964         type => 'boolean',
 965         optional => 1,
 966     },
 967     sport => {
 968         type => 'string', format => 'pve-fw-port-spec',
 969         optional => 1,
 970     },
 971     dport => {
 972         type => 'string', format => 'pve-fw-port-spec',
 973         optional => 1,
 974     },
 975     comment => {
 976         type => 'string',
 977         optional => 1,
 978     },
 979 };
 980
 981 sub add_rule_properties {
 982     my ($properties) = @_;
 983
 984     foreach my $k (keys %$rule_properties) {
 985         my $h = $rule_properties->{$k};
 986         # copy data, so that we can modify later without side effects
 987         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 988     }
 989
 990     return $properties;
 991 }
 992
 993 sub delete_rule_properties {
 994     my ($rule, $delete_str) = @_;
 995
 996     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 997         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 998             if !defined($rule_properties->{$opt});
 999         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1000             if $opt eq 'type' || $opt eq 'action';
1001         delete $rule->{$opt};
1002     }
1003
1004     return $rule;
1005 }
1006
1007 my $apply_macro = sub {
1008     my ($macro_name, $param, $verify) = @_;
1009
1010     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1011     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1012
1013     my $rules = [];
1014
1015     foreach my $templ (@$macro_rules) {
1016         my $rule = {};
1017         my $param_used = {};
1018         foreach my $k (keys %$templ) {
1019             my $v = $templ->{$k};
1020             if ($v eq 'PARAM') {
1021                 $v = $param->{$k};
1022                 $param_used->{$k} = 1;
1023             } elsif ($v eq 'DEST') {
1024                 $v = $param->{dest};
1025                 $param_used->{dest} = 1;
1026             } elsif ($v eq 'SOURCE') {
1027                 $v = $param->{source};
1028                 $param_used->{source} = 1;
1029             }
1030
1031             if (!defined($v)) {
1032                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1033                 raise_param_exc({ macro => $msg }) if $verify;
1034                 die "$msg\n";
1035             }
1036             $rule->{$k} = $v;
1037         }
1038         foreach my $k (keys %$param) {
1039             next if $k eq 'macro';
1040             next if !defined($param->{$k});
1041             next if $param_used->{$k};
1042             if (defined($rule->{$k})) {
1043                 if ($rule->{$k} ne $param->{$k}) {
1044                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1045                     raise_param_exc({ $k => $msg }) if $verify;
1046                     die "$msg\n";
1047                 }
1048             } else {
1049                 $rule->{$k} = $param->{$k};
1050             }
1051         }
1052         push @$rules, $rule;
1053     }
1054
1055     return $rules;
1056 };
1057
1058 my $rule_env_iface_lookup = {
1059     'ct' => 1,
1060     'vm' => 1,
1061     'group' => 0,
1062     'cluster' => 1,
1063     'host' => 1,
1064 };
1065
1066 sub verify_rule {
1067     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1068
1069     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1070
1071     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1072     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1073
1074     my $errors = $rule->{errors} || {};
1075
1076     my $error_count = 0;
1077
1078     my $add_error = sub {
1079         my ($param, $msg)  = @_;
1080         chomp $msg;
1081         raise_param_exc({ $param => $msg }) if !$noerr;
1082         $error_count++;
1083         $errors->{$param} = $msg if !$errors->{$param};
1084     };
1085
1086     my $check_ipset_or_alias_property = sub {
1087         my ($name) = @_;
1088
1089         if (my $value = $rule->{$name}) {
1090             if ($value =~ m/^\+/) {
1091                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1092                     &$add_error($name, "no such ipset '$1'")
1093                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1094
1095                 } else {
1096                     &$add_error($name, "invalid ipset name '$value'");
1097                 }
1098             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1099                 my $alias = lc($value);
1100                 &$add_error($name, "no such alias '$value'")
1101                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1102             }
1103         }
1104     };
1105
1106     my $type = $rule->{type};
1107     my $action = $rule->{action};
1108
1109     &$add_error('type', "missing property") if !$type;
1110     &$add_error('action', "missing property") if !$action;
1111
1112     if ($type) {
1113         if ($type eq  'in' || $type eq 'out') {
1114             &$add_error('action', "unknown action '$action'")
1115                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1116         } elsif ($type eq 'group') {
1117             &$add_error('type', "security groups not allowed")
1118                 if !$allow_groups;
1119             &$add_error('action', "invalid characters in security group name")
1120                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1121         } else {
1122             &$add_error('type', "unknown rule type '$type'");
1123         }
1124     }
1125
1126     if ($rule->{iface}) {
1127         &$add_error('type', "parameter -i not allowed for this rule type")
1128             if !$allow_iface;
1129         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1130         &$add_error('iface', $@) if $@;
1131         if ($rule_env eq 'vm') {
1132             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1133                 if $rule->{iface} !~  m/^net(\d+)$/;
1134         } elsif ($rule_env eq 'ct') {
1135             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1136                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1137         }
1138     }
1139
1140     if ($rule->{macro}) {
1141         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1142             $rule->{macro} = $preferred_name;
1143         } else {
1144             &$add_error('macro', "unknown macro '$rule->{macro}'");
1145         }
1146     }
1147
1148     if ($rule->{proto}) {
1149         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1150         &$add_error('proto', $@) if $@;
1151     }
1152
1153     if ($rule->{dport}) {
1154         eval { parse_port_name_number_or_range($rule->{dport}); };
1155         &$add_error('dport', $@) if $@;
1156         &$add_error('proto', "missing property - 'dport' requires this property")
1157             if !$rule->{proto};
1158     }
1159
1160     if ($rule->{sport}) {
1161         eval { parse_port_name_number_or_range($rule->{sport}); };
1162         &$add_error('sport', $@) if $@;
1163         &$add_error('proto', "missing property - 'sport' requires this property")
1164             if !$rule->{proto};
1165     }
1166
1167     if ($rule->{source}) {
1168         eval { parse_address_list($rule->{source}); };
1169         &$add_error('source', $@) if $@;
1170         &$check_ipset_or_alias_property('source');
1171     }
1172
1173     if ($rule->{dest}) {
1174         eval { parse_address_list($rule->{dest}); };
1175         &$add_error('dest', $@) if $@;
1176         &$check_ipset_or_alias_property('dest');
1177     }
1178
1179     if ($rule->{macro} && !$error_count) {
1180         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1181         if (my $err = $@) {
1182             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1183                 my $eh = $err->{errors};
1184                 foreach my $p (keys %$eh) {
1185                     &$add_error($p, $eh->{$p});
1186                 }
1187             } else {
1188                 &$add_error('macro', "$err");
1189             }
1190         }
1191     }
1192
1193     $rule->{errors} = $errors if $error_count;
1194
1195     return $rule;
1196 }
1197
1198 sub copy_rule_data {
1199     my ($rule, $param) = @_;
1200
1201     foreach my $k (keys %$rule_properties) {
1202         if (defined(my $v = $param->{$k})) {
1203             if ($v eq '' || $v eq '-') {
1204                 delete $rule->{$k};
1205             } else {
1206                 $rule->{$k} = $v;
1207             }
1208         }
1209     }
1210
1211     return $rule;
1212 }
1213
1214 # core functions
1215 my $bridge_firewall_enabled = 0;
1216
1217 sub enable_bridge_firewall {
1218
1219     return if $bridge_firewall_enabled; # only once
1220
1221     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1222     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1223
1224     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1225     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1226
1227     $bridge_firewall_enabled = 1;
1228 }
1229
1230 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1231
1232 sub iptables_restore_cmdlist {
1233     my ($cmdlist) = @_;
1234
1235     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1236 }
1237
1238 sub ipset_restore_cmdlist {
1239     my ($cmdlist) = @_;
1240
1241     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1242 }
1243
1244 sub iptables_get_chains {
1245
1246     my $res = {};
1247
1248     # check what chains we want to track
1249     my $is_pvefw_chain = sub {
1250         my $name = shift;
1251
1252         return 1 if $name =~ m/^PVEFW-\S+$/;
1253
1254         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1255
1256         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1257
1258         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1259
1260         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1261         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1262
1263         return undef;
1264     };
1265
1266     my $table = '';
1267
1268     my $hooks = {};
1269
1270     my $parser = sub {
1271         my $line = shift;
1272
1273         return if $line =~ m/^#/;
1274         return if $line =~ m/^\s*$/;
1275
1276         if ($line =~ m/^\*(\S+)$/) {
1277             $table = $1;
1278             return;
1279         }
1280
1281         return if $table ne 'filter';
1282
1283         if ($line =~ m/^:(\S+)\s/) {
1284             my $chain = $1;
1285             return if !&$is_pvefw_chain($chain);
1286             $res->{$chain} = "unknown";
1287         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1288             my ($chain, $sig) = ($1, $2);
1289             return if !&$is_pvefw_chain($chain);
1290             $res->{$chain} = $sig;
1291         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1292             $hooks->{$1} = 1;
1293         } else {
1294             # simply ignore the rest
1295             return;
1296         }
1297     };
1298
1299     run_command("/sbin/iptables-save", outfunc => $parser);
1300
1301     return wantarray ? ($res, $hooks) : $res;
1302 }
1303
1304 sub iptables_chain_digest {
1305     my ($rules) = @_;
1306     my $digest = Digest::SHA->new('sha1');
1307     foreach my $rule (@$rules) { # order is important
1308         $digest->add($rule);
1309     }
1310     return $digest->b64digest;
1311 }
1312
1313 sub ipset_chain_digest {
1314     my ($rules) = @_;
1315
1316     my $digest = Digest::SHA->new('sha1');
1317     foreach my $rule (sort @$rules) { # note: sorted
1318         $digest->add($rule);
1319     }
1320     return $digest->b64digest;
1321 }
1322
1323 sub ipset_get_chains {
1324
1325     my $res = {};
1326     my $chains = {};
1327
1328     my $parser = sub {
1329         my $line = shift;
1330
1331         return if $line =~ m/^#/;
1332         return if $line =~ m/^\s*$/;
1333         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1334             my $chain = $1;
1335             $line =~ s/\s+$//; # delete trailing white space
1336             push @{$chains->{$chain}}, $line;
1337         } else {
1338             # simply ignore the rest
1339             return;
1340         }
1341     };
1342
1343     run_command("/usr/sbin/ipset save", outfunc => $parser);
1344
1345     # compute digest for each chain
1346     foreach my $chain (keys %$chains) {
1347         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1348     }
1349
1350     return $res;
1351 }
1352
1353 sub ruleset_generate_cmdstr {
1354     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1355
1356     return if defined($rule->{enable}) && !$rule->{enable};
1357     return if $rule->{errors};
1358
1359     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1360
1361     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1362     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1363
1364     my @cmd = ();
1365
1366     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1367     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1368
1369     my $source = $rule->{source};
1370     my $dest = $rule->{dest};
1371
1372     if ($source) {
1373         if ($source =~ m/^\+/) {
1374             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1375                 my $name = $1;
1376                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1377                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1378                     push @cmd, "-m set --match-set ${ipset_chain} src";
1379                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1380                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1381                     push @cmd, "-m set --match-set ${ipset_chain} src";
1382                 } else {
1383                     die "no such ipset '$name'\n";
1384                 }
1385             } else {
1386                 die "invalid security group name '$source'\n";
1387             }
1388         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1389             my $alias = lc($source);
1390             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1391             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1392             die "no such alias '$source'\n" if !$e;
1393             push @cmd, "-s $e->{cidr}";
1394         } elsif ($source =~ m/\-/){
1395             push @cmd, "-m iprange --src-range $source";
1396         } else {
1397             push @cmd, "-s $source";
1398         }
1399     }
1400
1401     if ($dest) {
1402         if ($dest =~ m/^\+/) {
1403             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1404                 my $name = $1;
1405                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1406                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1407                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1408                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1409                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1410                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1411                 } else {
1412                     die "no such ipset '$name'\n";
1413                 }
1414             } else {
1415                 die "invalid security group name '$dest'\n";
1416             }
1417         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1418             my $alias = lc($dest);
1419             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1420             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1421             die "no such alias '$dest'\n" if !$e;
1422             push @cmd, "-d $e->{cidr}";
1423         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1424             push @cmd, "-m iprange --dst-range $dest";
1425         } else {
1426             push @cmd, "-d $dest";
1427         }
1428     }
1429
1430     if ($rule->{proto}) {
1431         push @cmd, "-p $rule->{proto}";
1432
1433         my $multiport = 0;
1434         $multiport++ if $nbdport > 1;
1435         $multiport++ if $nbsport > 1;
1436
1437         push @cmd, "--match multiport" if $multiport;
1438
1439         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1440             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1441
1442         if ($rule->{dport}) {
1443             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1444                 # Note: we use dport to store --icmp-type
1445                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1446                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1447             } else {
1448                 if ($nbdport > 1) {
1449                     if ($multiport == 2) {
1450                         push @cmd,  "--ports $rule->{dport}";
1451                     } else {
1452                         push @cmd, "--dports $rule->{dport}";
1453                     }
1454                 } else {
1455                     push @cmd, "--dport $rule->{dport}";
1456                 }
1457             }
1458         }
1459
1460         if ($rule->{sport}) {
1461             if ($nbsport > 1) {
1462                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1463             } else {
1464                 push @cmd, "--sport $rule->{sport}";
1465             }
1466         }
1467     } elsif ($rule->{dport} || $rule->{sport}) {
1468         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1469         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1470     }
1471
1472     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1473
1474     if (my $action = $rule->{action}) {
1475         $action = $actions->{$action} if defined($actions->{$action});
1476         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1477         push @cmd, $goto ? "-g $action" : "-j $action";
1478     }
1479
1480     return scalar(@cmd) ? join(' ', @cmd) : undef;
1481 }
1482
1483 sub ruleset_generate_rule {
1484     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1485
1486     my $rules;
1487
1488     if ($rule->{macro}) {
1489         $rules = &$apply_macro($rule->{macro}, $rule);
1490     } else {
1491         $rules = [ $rule ];
1492     }
1493
1494     # update all or nothing
1495
1496     my @cmds = ();
1497     foreach my $tmp (@$rules) {
1498         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1499             push @cmds, $cmdstr;
1500         }
1501     }
1502
1503     foreach my $cmdstr (@cmds) {
1504         ruleset_addrule($ruleset, $chain, $cmdstr);
1505     }
1506 }
1507
1508 sub ruleset_generate_rule_insert {
1509     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1510
1511     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1512
1513     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1514         ruleset_insertrule($ruleset, $chain, $cmdstr);
1515     }
1516 }
1517
1518 sub ruleset_create_chain {
1519     my ($ruleset, $chain) = @_;
1520
1521     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1522     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1523
1524     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1525
1526     $ruleset->{$chain} = [];
1527 }
1528
1529 sub ruleset_chain_exist {
1530     my ($ruleset, $chain) = @_;
1531
1532     return $ruleset->{$chain} ? 1 : undef;
1533 }
1534
1535 sub ruleset_addrule {
1536    my ($ruleset, $chain, $rule) = @_;
1537
1538    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1539
1540    push @{$ruleset->{$chain}}, "-A $chain $rule";
1541 }
1542
1543 sub ruleset_insertrule {
1544    my ($ruleset, $chain, $rule) = @_;
1545
1546    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1547
1548    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1549 }
1550
1551 sub get_log_rule_base {
1552     my ($chain, $vmid, $msg, $loglevel) = @_;
1553
1554     die "internal error - no log level" if !defined($loglevel);
1555
1556     $vmid = 0 if !defined($vmid);
1557
1558     # Note: we use special format for prefix to pass further
1559     # info to log daemon (VMID, LOGVELEL and CHAIN)
1560
1561     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1562 }
1563
1564 sub ruleset_addlog {
1565     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1566
1567     return if !defined($loglevel);
1568
1569     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1570
1571     $logrule = "$rule $logrule" if defined($rule);
1572
1573     ruleset_addrule($ruleset, $chain, $logrule);
1574 }
1575
1576 sub ruleset_add_chain_policy {
1577     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1578
1579     if ($policy eq 'ACCEPT') {
1580
1581         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1582                               { ACCEPT =>  $accept_action});
1583
1584     } elsif ($policy eq 'DROP') {
1585
1586         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1587
1588         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1589
1590         ruleset_addrule($ruleset, $chain, "-j DROP");
1591     } elsif ($policy eq 'REJECT') {
1592         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1593
1594         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1595
1596         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1597     } else {
1598         # should not happen
1599         die "internal error: unknown policy '$policy'";
1600     }
1601 }
1602
1603 sub ruleset_chain_add_conn_filters {
1604     my ($ruleset, $chain, $accept) = @_;
1605
1606     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1607     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1608 }
1609
1610 sub ruleset_chain_add_input_filters {
1611     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1612
1613     if ($cluster_conf->{ipset}->{blacklist}){
1614         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1615             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1616             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1617             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1618         }
1619         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1620         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1621     }
1622
1623     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1624         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1625     }
1626
1627     if ($options->{tcpflags}) {
1628         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1629     }
1630 }
1631
1632 sub ruleset_create_vm_chain {
1633     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1634
1635     ruleset_create_chain($ruleset, $chain);
1636     my $accept = generate_nfqueue($options);
1637
1638     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1639         if ($direction eq 'OUT') {
1640             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1641                                                       proto => 'udp', sport => 68, dport => 67 });
1642         } else {
1643             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1644                                                       proto => 'udp', sport => 67, dport => 68 });
1645         }
1646     }
1647
1648     if ($direction eq 'OUT') {
1649         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1650             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1651         }
1652         if ($ipfilter_ipset) {
1653             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1654         }
1655         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1656     }
1657 }
1658
1659 sub ruleset_add_group_rule {
1660     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1661
1662     my $group = $rule->{action};
1663     my $group_chain = "GROUP-$group-$direction";
1664     if(!ruleset_chain_exist($ruleset, $group_chain)){
1665         generate_group_rules($ruleset, $cluster_conf, $group);
1666     }
1667
1668     if ($direction eq 'OUT' && $rule->{iface_out}) {
1669         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1670     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1671         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1672     } else {
1673         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1674     }
1675
1676     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1677 }
1678
1679 sub ruleset_generate_vm_rules {
1680     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1681
1682     my $lc_direction = lc($direction);
1683
1684     my $in_accept = generate_nfqueue($options);
1685
1686     foreach my $rule (@$rules) {
1687         next if $rule->{iface} && $rule->{iface} ne $netid;
1688         next if !$rule->{enable} || $rule->{errors};
1689         if ($rule->{type} eq 'group') {
1690             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1691                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1692         } else {
1693             next if $rule->{type} ne $lc_direction;
1694             eval {
1695                 if ($direction eq 'OUT') {
1696                     ruleset_generate_rule($ruleset, $chain, $rule,
1697                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1698                                           undef, $cluster_conf, $vmfw_conf);
1699                 } else {
1700                     ruleset_generate_rule($ruleset, $chain, $rule,
1701                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1702                                           undef, $cluster_conf, $vmfw_conf);
1703                 }
1704             };
1705             warn $@ if $@;
1706         }
1707     }
1708 }
1709
1710 sub generate_nfqueue {
1711     my ($options) = @_;
1712
1713     if ($options->{ips}) {
1714         my $action = "NFQUEUE";
1715         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1716             if (defined($3) && defined($1)) {
1717                 $action .= " --queue-balance $1:$3";
1718             } elsif (defined($1)) {
1719                 $action .= " --queue-num $1";
1720             }
1721         }
1722         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1723         return $action;
1724     } else {
1725         return "ACCEPT";
1726     }
1727 }
1728
1729 sub ruleset_generate_vm_ipsrules {
1730     my ($ruleset, $options, $direction, $iface) = @_;
1731
1732     if ($options->{ips} && $direction eq 'IN') {
1733         my $nfqueue = generate_nfqueue($options);
1734
1735         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1736             ruleset_create_chain($ruleset, "PVEFW-IPS");
1737         }
1738
1739         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1740     }
1741 }
1742
1743 sub generate_venet_rules_direction {
1744     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1745
1746     my $lc_direction = lc($direction);
1747
1748     my $rules = $vmfw_conf->{rules};
1749
1750     my $options = $vmfw_conf->{options};
1751     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1752
1753     my $chain = "venet0-$vmid-$direction";
1754
1755     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1756
1757     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1758
1759     # implement policy
1760     my $policy;
1761
1762     if ($direction eq 'OUT') {
1763         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1764     } else {
1765         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1766     }
1767
1768     my $accept = generate_nfqueue($options);
1769     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1770     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1771
1772     if ($direction eq 'OUT') {
1773         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1774             action => $chain,
1775             source => $ip,
1776             iface_in => 'venet0'});
1777     } else {
1778         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1779             action => $chain,
1780             dest => $ip,
1781             iface_out => 'venet0'});
1782     }
1783 }
1784
1785 sub generate_tap_rules_direction {
1786     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1787
1788     my $lc_direction = lc($direction);
1789
1790     my $rules = $vmfw_conf->{rules};
1791
1792     my $options = $vmfw_conf->{options};
1793     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1794
1795     my $tapchain = "$iface-$direction";
1796
1797     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1798     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1799         if $vmfw_conf->{ipset}->{$ipfilter_name};
1800
1801     # create chain with mac and ip filter
1802     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1803
1804     if ($options->{enable}) {
1805         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1806
1807         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1808
1809         # implement policy
1810         my $policy;
1811
1812         if ($direction eq 'OUT') {
1813             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1814         } else {
1815         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1816         }
1817
1818         my $accept = generate_nfqueue($options);
1819         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1820         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1821     } else {
1822         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1823         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1824     }
1825
1826     # plug the tap chain to bridge chain
1827     if ($direction eq 'IN') {
1828         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1829                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1830     } else {
1831         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1832                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1833     }
1834 }
1835
1836 sub enable_host_firewall {
1837     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1838
1839     my $options = $hostfw_conf->{options};
1840     my $cluster_options = $cluster_conf->{options};
1841     my $rules = $hostfw_conf->{rules};
1842     my $cluster_rules = $cluster_conf->{rules};
1843
1844     # host inbound firewall
1845     my $chain = "PVEFW-HOST-IN";
1846     ruleset_create_chain($ruleset, $chain);
1847
1848     my $loglevel = get_option_log_level($options, "log_level_in");
1849
1850     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1851
1852     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1853     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1854
1855     # we use RETURN because we need to check also tap rules
1856     my $accept_action = 'RETURN';
1857
1858     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1859
1860     # add host rules first, so that cluster wide rules can be overwritten
1861     foreach my $rule (@$rules, @$cluster_rules) {
1862         next if !$rule->{enable} || $rule->{errors};
1863
1864         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1865
1866         eval {
1867             if ($rule->{type} eq 'group') {
1868                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1869             } elsif ($rule->{type} eq 'in') {
1870                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1871                                       undef, $cluster_conf, $hostfw_conf);
1872             }
1873         };
1874         warn $@ if $@;
1875         delete $rule->{iface_in};
1876     }
1877
1878     # allow standard traffic for management ipset (includes cluster network)
1879     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1880     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1881     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1882     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1883     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1884     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1885
1886     my $localnet = local_network();
1887
1888     # corosync
1889     if ($localnet) {
1890         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1891         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1892         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1893     }
1894
1895     # implement input policy
1896     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1897     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1898
1899     # host outbound firewall
1900     $chain = "PVEFW-HOST-OUT";
1901     ruleset_create_chain($ruleset, $chain);
1902
1903     $loglevel = get_option_log_level($options, "log_level_out");
1904
1905     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1906
1907     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1908
1909     # we use RETURN because we may want to check other thigs later
1910     $accept_action = 'RETURN';
1911
1912     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1913
1914     # add host rules first, so that cluster wide rules can be overwritten
1915     foreach my $rule (@$rules, @$cluster_rules) {
1916         next if !$rule->{enable} || $rule->{errors};
1917
1918         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1919         eval {
1920             if ($rule->{type} eq 'group') {
1921                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1922             } elsif ($rule->{type} eq 'out') {
1923                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1924                                       undef, $cluster_conf, $hostfw_conf);
1925             }
1926         };
1927         warn $@ if $@;
1928         delete $rule->{iface_out};
1929     }
1930
1931     # allow standard traffic on cluster network
1932     if ($localnet) {
1933         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1934         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1935         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1936         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1937
1938         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1939         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1940         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1941     }
1942
1943     # implement output policy
1944     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1945     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1946
1947     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1948     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1949 }
1950
1951 sub generate_group_rules {
1952     my ($ruleset, $cluster_conf, $group) = @_;
1953
1954     my $rules = $cluster_conf->{groups}->{$group};
1955
1956     if (!$rules) {
1957         warn "no such security group '$group'\n";
1958         $rules = []; # create empty chain
1959     }
1960
1961     my $chain = "GROUP-${group}-IN";
1962
1963     ruleset_create_chain($ruleset, $chain);
1964     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1965
1966     foreach my $rule (@$rules) {
1967         next if $rule->{type} ne 'in';
1968         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1969     }
1970
1971     $chain = "GROUP-${group}-OUT";
1972
1973     ruleset_create_chain($ruleset, $chain);
1974     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1975
1976     foreach my $rule (@$rules) {
1977         next if $rule->{type} ne 'out';
1978         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1979         # check also other tap rules later
1980         ruleset_generate_rule($ruleset, $chain, $rule,
1981                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1982     }
1983 }
1984
1985 my $MAX_NETS = 32;
1986 my $valid_netdev_names = {};
1987 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1988     $valid_netdev_names->{"net$i"} = 1;
1989 }
1990
1991 sub parse_fw_rule {
1992     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1993
1994     my $orig_line = $line;
1995
1996     my $rule = {};
1997
1998     # we can add single line comments to the end of the rule
1999     if ($line =~ s/#\s*(.*?)\s*$//) {
2000         $rule->{comment} = decode('utf8', $1);
2001     }
2002
2003     # we can disable a rule when prefixed with '|'
2004
2005     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2006
2007     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2008         die "unable to parse rule: $line\n";
2009
2010     $rule->{type} = lc($1);
2011     $rule->{action} = $2;
2012
2013     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2014         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2015             $rule->{macro} = $1;
2016             $rule->{action} = $2;
2017         }
2018     }
2019
2020     while (length($line)) {
2021         if ($line =~ s/^-i (\S+)\s*//) {
2022             $rule->{iface} = $1;
2023             next;
2024         }
2025
2026         last if $rule->{type} eq 'group';
2027
2028         if ($line =~ s/^-p (\S+)\s*//) {
2029             $rule->{proto} = $1;
2030             next;
2031         }
2032
2033         if ($line =~ s/^-dport (\S+)\s*//) {
2034             $rule->{dport} = $1;
2035             next;
2036         }
2037
2038         if ($line =~ s/^-sport (\S+)\s*//) {
2039             $rule->{sport} = $1;
2040             next;
2041         }
2042         if ($line =~ s/^-source (\S+)\s*//) {
2043             $rule->{source} = $1;
2044             next;
2045         }
2046         if ($line =~ s/^-dest (\S+)\s*//) {
2047             $rule->{dest} = $1;
2048             next;
2049         }
2050
2051         last;
2052     }
2053
2054     die "unable to parse rule parameters: $line\n" if length($line);
2055
2056     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2057     if ($verbose && $rule->{errors}) {
2058         warn "$prefix - errors in rule parameters: $orig_line\n";
2059         foreach my $p (keys %{$rule->{errors}}) {
2060             warn "  $p: $rule->{errors}->{$p}\n";
2061         }
2062     }
2063
2064     return $rule;
2065 }
2066
2067 sub parse_vmfw_option {
2068     my ($line) = @_;
2069
2070     my ($opt, $value);
2071
2072     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2073
2074     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2075         $opt = lc($1);
2076         $value = int($2);
2077     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2078         $opt = lc($1);
2079         $value = $2 ? lc($3) : '';
2080     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2081         $opt = lc($1);
2082         $value = uc($3);
2083     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2084         $opt = lc($1);
2085         $value = $2;
2086     } else {
2087         die "can't parse option '$line'\n"
2088     }
2089
2090     return ($opt, $value);
2091 }
2092
2093 sub parse_hostfw_option {
2094     my ($line) = @_;
2095
2096     my ($opt, $value);
2097
2098     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2099
2100     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2101         $opt = lc($1);
2102         $value = int($2);
2103     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2104         $opt = lc($1);
2105         $value = $2 ? lc($3) : '';
2106     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2107         $opt = lc($1);
2108         $value = int($2);
2109     } else {
2110         die "can't parse option '$line'\n"
2111     }
2112
2113     return ($opt, $value);
2114 }
2115
2116 sub parse_clusterfw_option {
2117     my ($line) = @_;
2118
2119     my ($opt, $value);
2120
2121     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2122         $opt = lc($1);
2123         $value = int($2);
2124     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2125         $opt = lc($1);
2126         $value = uc($3);
2127     } else {
2128         die "can't parse option '$line'\n"
2129     }
2130
2131     return ($opt, $value);
2132 }
2133
2134 sub resolve_alias {
2135     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2136
2137     if ($cidr !~ m/^\d/) {
2138         my $alias = lc($cidr);
2139         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2140         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2141         return $e->{cidr} if $e;
2142
2143         die "no such alias '$cidr'\n";
2144     }
2145
2146     return $cidr;
2147 }
2148
2149 sub parse_alias {
2150     my ($line) = @_;
2151
2152     # we can add single line comments to the end of the line
2153     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2154
2155     if ($line =~ m/^(\S+)\s(\S+)$/) {
2156         my ($name, $cidr) = ($1, $2);
2157         $cidr =~ s|/32$||;
2158         pve_verify_ipv4_or_cidr($cidr);
2159         my $data = {
2160             name => $name,
2161             cidr => $cidr,
2162         };
2163         $data->{comment} = $comment  if $comment;
2164         return $data;
2165     }
2166
2167     return undef;
2168 }
2169
2170 sub generic_fw_config_parser {
2171     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2172
2173     my $section;
2174     my $group;
2175
2176     my $res = $empty_conf;
2177
2178     while (defined(my $line = <$fh>)) {
2179         next if $line =~ m/^#/;
2180         next if $line =~ m/^\s*$/;
2181
2182         chomp $line;
2183
2184         my $linenr = $fh->input_line_number();
2185         my $prefix = "$filename (line $linenr)";
2186
2187         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2188             $section = 'options';
2189             next;
2190         }
2191
2192         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2193             $section = 'aliases';
2194             next;
2195         }
2196
2197         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2198             $section = 'groups';
2199             $group = lc($1);
2200             my $comment = $2;
2201             eval {
2202                 die "security group name too long\n" if length($group) > $max_group_name_length;
2203                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2204             };
2205             if (my $err = $@) {
2206                 ($section, $group, $comment) = undef;
2207                 warn "$prefix: $err";
2208                 next;
2209             }
2210
2211             $res->{$section}->{$group} = [];
2212             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2213                 if $comment;
2214             next;
2215         }
2216
2217         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2218             $section = 'rules';
2219             next;
2220         }
2221
2222         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2223             $section = 'ipset';
2224             $group = lc($1);
2225             my $comment = $2;
2226             eval {
2227                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2228                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2229             };
2230             if (my $err = $@) {
2231                 ($section, $group, $comment) = undef;
2232                 warn "$prefix: $err";
2233                 next;
2234             }
2235
2236             $res->{$section}->{$group} = [];
2237             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2238                 if $comment;
2239             next;
2240         }
2241
2242         if (!$section) {
2243             warn "$prefix: skip line - no section\n";
2244             next;
2245         }
2246
2247         if ($section eq 'options') {
2248             eval {
2249                 my ($opt, $value);
2250                 if ($rule_env eq 'cluster') {
2251                     ($opt, $value) = parse_clusterfw_option($line);
2252                 } elsif ($rule_env eq 'host') {
2253                     ($opt, $value) = parse_hostfw_option($line);
2254                 } else {
2255                     ($opt, $value) = parse_vmfw_option($line);
2256                 }
2257                 $res->{options}->{$opt} = $value;
2258             };
2259             warn "$prefix: $@" if $@;
2260         } elsif ($section eq 'aliases') {
2261             eval {
2262                 my $data = parse_alias($line);
2263                 $res->{aliases}->{lc($data->{name})} = $data;
2264             };
2265             warn "$prefix: $@" if $@;
2266         } elsif ($section eq 'rules') {
2267             my $rule;
2268             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2269             if (my $err = $@) {
2270                 warn "$prefix: $err";
2271                 next;
2272             }
2273             push @{$res->{$section}}, $rule;
2274         } elsif ($section eq 'groups') {
2275             my $rule;
2276             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2277             if (my $err = $@) {
2278                 warn "$prefix: $err";
2279                 next;
2280             }
2281             push @{$res->{$section}->{$group}}, $rule;
2282         } elsif ($section eq 'ipset') {
2283             # we can add single line comments to the end of the rule
2284             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2285
2286             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2287             my $nomatch = $1;
2288             my $cidr = $2;
2289             my $errors;
2290
2291             if ($nomatch && !$feature_ipset_nomatch) {
2292                 $errors->{nomatch} = "nomatch not supported by kernel";
2293             }
2294
2295             eval {
2296                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2297                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2298                 } else {
2299                     $cidr =~ s|/32$||;
2300                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2301                 }
2302             };
2303             if (my $err = $@) {
2304                 chomp $err;
2305                 $errors->{cidr} = $err;
2306             }
2307
2308             my $entry = { cidr => $cidr };
2309             $entry->{nomatch} = 1 if $nomatch;
2310             $entry->{comment} = $comment if $comment;
2311             $entry->{errors} =  $errors if $errors;
2312
2313             if ($verbose && $errors) {
2314                 warn "$prefix - errors in ipset '$group': $line\n";
2315                 foreach my $p (keys %{$errors}) {
2316                     warn "  $p: $errors->{$p}\n";
2317                 }
2318             }
2319
2320             push @{$res->{$section}->{$group}}, $entry;
2321         } else {
2322             warn "$prefix: skip line - unknown section\n";
2323             next;
2324         }
2325     }
2326
2327     return $res;
2328 }
2329
2330 sub parse_hostfw_config {
2331     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2332
2333     my $empty_conf = { rules => [], options => {}};
2334
2335     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2336 }
2337
2338 sub parse_vmfw_config {
2339     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2340
2341     my $empty_conf = {
2342         rules => [],
2343         options => {},
2344         aliases => {},
2345         ipset => {} ,
2346         ipset_comments => {},
2347     };
2348
2349     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2350 }
2351
2352 sub parse_clusterfw_config {
2353     my ($filename, $fh, $verbose) = @_;
2354
2355     my $section;
2356     my $group;
2357
2358     my $empty_conf = {
2359         rules => [],
2360         options => {},
2361         aliases => {},
2362         groups => {},
2363         group_comments => {},
2364         ipset => {} ,
2365         ipset_comments => {},
2366     };
2367
2368     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2369 }
2370
2371 sub run_locked {
2372     my ($code, @param) = @_;
2373
2374     my $timeout = 10;
2375
2376     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2377
2378     die $@ if $@;
2379
2380     return $res;
2381 }
2382
2383 sub read_local_vm_config {
2384
2385     my $openvz = {};
2386     my $qemu = {};
2387
2388     my $vmdata = { openvz => $openvz, qemu => $qemu };
2389
2390     my $vmlist = PVE::Cluster::get_vmlist();
2391     return $vmdata if !$vmlist || !$vmlist->{ids};
2392     my $ids = $vmlist->{ids};
2393
2394     foreach my $vmid (keys %$ids) {
2395         next if !$vmid; # skip VE0
2396         my $d = $ids->{$vmid};
2397         next if !$d->{node} || $d->{node} ne $nodename;
2398         next if !$d->{type};
2399         if ($d->{type} eq 'openvz') {
2400             if ($have_pve_manager) {
2401                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2402                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2403                     $openvz->{$vmid} = $conf;
2404                 }
2405             }
2406         } elsif ($d->{type} eq 'qemu') {
2407             if ($have_qemu_server) {
2408                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2409                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2410                     $qemu->{$vmid} = $conf;
2411                 }
2412             }
2413         }
2414     }
2415
2416     return $vmdata;
2417 };
2418
2419 sub load_vmfw_conf {
2420     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2421
2422     my $vmfw_conf = {};
2423
2424     $dir = $pvefw_conf_dir if !defined($dir);
2425
2426     my $filename = "$dir/$vmid.fw";
2427     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2428         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2429         $vmfw_conf->{vmid} = $vmid;
2430     }
2431
2432     return $vmfw_conf;
2433 }
2434
2435 my $format_rules = sub {
2436     my ($rules, $allow_iface) = @_;
2437
2438     my $raw = '';
2439
2440     foreach my $rule (@$rules) {
2441         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2442             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2443             $raw .= uc($rule->{type});
2444             if ($rule->{macro}) {
2445                 $raw .= " $rule->{macro}($rule->{action})";
2446             } else {
2447                 $raw .= " " . $rule->{action};
2448             }
2449             if ($allow_iface && $rule->{iface}) {
2450                 $raw .= " -i $rule->{iface}";
2451             }
2452
2453             if ($rule->{type} ne  'group')  {
2454                 $raw .= " -source $rule->{source}" if $rule->{source};
2455                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2456                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2457                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2458                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2459             }
2460
2461             $raw .= " # " . encode('utf8', $rule->{comment})
2462                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2463             $raw .= "\n";
2464         } else {
2465             die "unknown rule type '$rule->{type}'";
2466         }
2467     }
2468
2469     return $raw;
2470 };
2471
2472 my $format_options = sub {
2473     my ($options) = @_;
2474
2475     my $raw = '';
2476
2477     $raw .= "[OPTIONS]\n\n";
2478     foreach my $opt (keys %$options) {
2479         $raw .= "$opt: $options->{$opt}\n";
2480     }
2481     $raw .= "\n";
2482
2483     return $raw;
2484 };
2485
2486 my $format_aliases = sub {
2487     my ($aliases) = @_;
2488
2489     my $raw = '';
2490
2491     $raw .= "[ALIASES]\n\n";
2492     foreach my $k (keys %$aliases) {
2493         my $e = $aliases->{$k};
2494         $raw .= "$e->{name} $e->{cidr}";
2495         $raw .= " # " . encode('utf8', $e->{comment})
2496             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2497         $raw .= "\n";
2498     }
2499     $raw .= "\n";
2500
2501     return $raw;
2502 };
2503
2504 my $format_ipsets = sub {
2505     my ($fw_conf) = @_;
2506
2507     my $raw = '';
2508
2509     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2510         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2511             my $utf8comment = encode('utf8', $comment);
2512             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2513         } else {
2514             $raw .= "[IPSET $ipset]\n\n";
2515         }
2516         my $options = $fw_conf->{ipset}->{$ipset};
2517
2518         my $nethash = {};
2519         foreach my $entry (@$options) {
2520             $nethash->{$entry->{cidr}} = $entry;
2521         }
2522
2523         foreach my $cidr (sort keys %$nethash) {
2524             my $entry = $nethash->{$cidr};
2525             my $line = $entry->{nomatch} ? '!' : '';
2526             $line .= $entry->{cidr};
2527             $line .= " # " . encode('utf8', $entry->{comment})
2528                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2529             $raw .= "$line\n";
2530         }
2531
2532         $raw .= "\n";
2533     }
2534
2535     return $raw;
2536 };
2537
2538 sub save_vmfw_conf {
2539     my ($vmid, $vmfw_conf) = @_;
2540
2541     my $raw = '';
2542
2543     my $options = $vmfw_conf->{options};
2544     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2545
2546     my $aliases = $vmfw_conf->{aliases};
2547     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2548
2549     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2550
2551     my $rules = $vmfw_conf->{rules} || [];
2552     if ($rules && scalar(@$rules)) {
2553         $raw .= "[RULES]\n\n";
2554         $raw .= &$format_rules($rules, 1);
2555         $raw .= "\n";
2556     }
2557
2558     mkdir $pvefw_conf_dir;
2559
2560     my $filename = "$pvefw_conf_dir/$vmid.fw";
2561     PVE::Tools::file_set_contents($filename, $raw);
2562 }
2563
2564 sub read_vm_firewall_configs {
2565     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2566
2567     my $vmfw_configs = {};
2568
2569     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2570         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2571         next if !$vmfw_conf->{options}; # skip if file does not exists
2572         $vmfw_configs->{$vmid} = $vmfw_conf;
2573     }
2574     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2575         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2576         next if !$vmfw_conf->{options}; # skip if file does not exists
2577         $vmfw_configs->{$vmid} = $vmfw_conf;
2578     }
2579
2580     return $vmfw_configs;
2581 }
2582
2583 sub get_option_log_level {
2584     my ($options, $k) = @_;
2585
2586     my $v = $options->{$k};
2587     $v = $default_log_level if !defined($v);
2588
2589     return undef if $v eq '' || $v eq 'nolog';
2590
2591     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2592
2593     return $v if ($v >= 0) && ($v <= 7);
2594
2595     warn "unknown log level ($k = '$v')\n";
2596
2597     return undef;
2598 }
2599
2600 sub generate_std_chains {
2601     my ($ruleset, $options) = @_;
2602
2603     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2604
2605     # same as shorewall smurflog.
2606     my $chain = 'PVEFW-smurflog';
2607     $pve_std_chains->{$chain} = [];
2608
2609     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2610     push @{$pve_std_chains->{$chain}}, "-j DROP";
2611
2612     # same as shorewall logflags action.
2613     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2614     $chain = 'PVEFW-logflags';
2615     $pve_std_chains->{$chain} = [];
2616
2617     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2618     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2619     push @{$pve_std_chains->{$chain}}, "-j DROP";
2620
2621     foreach my $chain (keys %$pve_std_chains) {
2622         ruleset_create_chain($ruleset, $chain);
2623         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2624             if (ref($rule)) {
2625                 ruleset_generate_rule($ruleset, $chain, $rule);
2626             } else {
2627                 ruleset_addrule($ruleset, $chain, $rule);
2628             }
2629         }
2630     }
2631 }
2632
2633 sub generate_ipset_chains {
2634     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2635
2636     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2637         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2638         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2639     }
2640 }
2641
2642 sub generate_ipset {
2643     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2644
2645     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2646
2647     my $hashsize = scalar(@$options);
2648     if ($hashsize <= 64) {
2649         $hashsize = 64;
2650     } else {
2651         $hashsize = round_powerof2($hashsize);
2652     }
2653
2654     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2655
2656     # remove duplicates
2657     my $nethash = {};
2658     foreach my $entry (@$options) {
2659         next if $entry->{errors}; # skip entries with errors
2660         eval {
2661             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2662             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2663         };
2664         warn $@ if $@;
2665     }
2666
2667     foreach my $cidr (sort keys %$nethash) {
2668         my $entry = $nethash->{$cidr};
2669
2670         my $cmd = "add $name $cidr";
2671         if ($entry->{nomatch}) {
2672             if ($feature_ipset_nomatch) {
2673                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2674             } else {
2675                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2676             }
2677         } else {
2678             push @{$ipset_ruleset->{$name}}, $cmd;
2679         }
2680     }
2681 }
2682
2683 sub round_powerof2 {
2684     my ($int) = @_;
2685
2686     $int--;
2687     $int |= $int >> $_ foreach (1,2,4,8,16);
2688     return ++$int;
2689 }
2690
2691 sub load_clusterfw_conf {
2692     my ($filename, $verbose) = @_;
2693
2694     $filename = $clusterfw_conf_filename if !defined($filename);
2695
2696     my $cluster_conf = {};
2697     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2698         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2699     }
2700
2701     return $cluster_conf;
2702 }
2703
2704 sub save_clusterfw_conf {
2705     my ($cluster_conf) = @_;
2706
2707     my $raw = '';
2708
2709     my $options = $cluster_conf->{options};
2710     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2711
2712     my $aliases = $cluster_conf->{aliases};
2713     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2714
2715     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2716
2717     my $rules = $cluster_conf->{rules};
2718     if ($rules && scalar(@$rules)) {
2719         $raw .= "[RULES]\n\n";
2720         $raw .= &$format_rules($rules, 1);
2721         $raw .= "\n";
2722     }
2723
2724     if ($cluster_conf->{groups}) {
2725         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2726             my $rules = $cluster_conf->{groups}->{$group};
2727             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2728                 my $utf8comment = encode('utf8', $comment);
2729                 $raw .= "[group $group] # $utf8comment\n\n";
2730             } else {
2731                 $raw .= "[group $group]\n\n";
2732             }
2733
2734             $raw .= &$format_rules($rules, 0);
2735             $raw .= "\n";
2736         }
2737     }
2738
2739     mkdir $pvefw_conf_dir;
2740     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2741 }
2742
2743 sub load_hostfw_conf {
2744     my ($cluster_conf, $filename, $verbose) = @_;
2745
2746     $filename = $hostfw_conf_filename if !defined($filename);
2747
2748     my $hostfw_conf = {};
2749     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2750         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2751     }
2752     return $hostfw_conf;
2753 }
2754
2755 sub save_hostfw_conf {
2756     my ($hostfw_conf) = @_;
2757
2758     my $raw = '';
2759
2760     my $options = $hostfw_conf->{options};
2761     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2762
2763     my $rules = $hostfw_conf->{rules};
2764     if ($rules && scalar(@$rules)) {
2765         $raw .= "[RULES]\n\n";
2766         $raw .= &$format_rules($rules, 1);
2767         $raw .= "\n";
2768     }
2769
2770     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2771 }
2772
2773 sub compile {
2774     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2775
2776     my $vmfw_configs;
2777
2778     if ($vmdata) { # test mode
2779         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2780         my $filename = "$testdir/cluster.fw";
2781         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2782
2783         $filename = "$testdir/host.fw";
2784         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2785
2786         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2787     } else { # normal operation
2788         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2789
2790         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2791
2792         $vmdata = read_local_vm_config();
2793         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2794     }
2795
2796     $cluster_conf->{ipset}->{venet0} = [];
2797     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2798
2799     my $localnet;
2800     if ($cluster_conf->{aliases}->{local_network}) {
2801         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2802     } else {
2803         $localnet = local_network() || '127.0.0.0/8';
2804         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2805     }
2806
2807     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2808
2809     return ({}, {}) if !$cluster_conf->{options}->{enable};
2810
2811     my $ruleset = {};
2812
2813     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2814     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2815
2816     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2817
2818     my $hostfw_options = $hostfw_conf->{options} || {};
2819
2820     # fixme: what log level should we use here?
2821     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2822
2823     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2824
2825
2826     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2827     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2828     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2829
2830     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2831     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2832
2833     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2834
2835     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2836     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2837
2838     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2839     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2840
2841     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2842
2843     generate_std_chains($ruleset, $hostfw_options);
2844
2845     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2846
2847     my $ipset_ruleset = {};
2848
2849     if ($hostfw_enable) {
2850         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2851         warn $@ if $@; # just to be sure - should not happen
2852     }
2853
2854     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2855
2856     # generate firewall rules for QEMU VMs
2857     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2858         eval {
2859             my $conf = $vmdata->{qemu}->{$vmid};
2860             my $vmfw_conf = $vmfw_configs->{$vmid};
2861             return if !$vmfw_conf;
2862
2863             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2864
2865             foreach my $netid (keys %$conf) {
2866                 next if $netid !~ m/^net(\d+)$/;
2867                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2868                 next if !$net->{firewall};
2869                 my $iface = "tap${vmid}i$1";
2870
2871                 my $macaddr = $net->{macaddr};
2872                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2873                                              $vmfw_conf, $vmid, 'IN');
2874                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2875                                              $vmfw_conf, $vmid, 'OUT');
2876             }
2877         };
2878         warn $@ if $@; # just to be sure - should not happen
2879     }
2880
2881     # generate firewall rules for OpenVZ containers
2882     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2883         eval {
2884             my $conf = $vmdata->{openvz}->{$vmid};
2885
2886             my $vmfw_conf = $vmfw_configs->{$vmid};
2887             return if !$vmfw_conf;
2888
2889             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2890
2891             if ($vmfw_conf->{options}->{enable}) {
2892                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2893                     my $ip = $conf->{ip_address}->{value};
2894                     $ip =~ s/\s+/,/g;
2895                     parse_address_list($ip); # make sure we have a valid $ip list
2896
2897                     my @ips = split(',', $ip);
2898
2899                     foreach my $singleip (@ips) {
2900                         my $venet0ipset = {};
2901                         $venet0ipset->{cidr} = $singleip;
2902                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2903                     }
2904
2905                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2906                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2907                 }
2908             }
2909
2910             if ($conf->{netif} && $conf->{netif}->{value}) {
2911                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2912                 foreach my $netid (keys %$netif) {
2913                     my $d = $netif->{$netid};
2914                     my $bridge = $d->{bridge};
2915                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2916                     my $macaddr = $d->{mac};
2917                     my $iface = $d->{host_ifname};
2918                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2919                                                  $vmfw_conf, $vmid, 'IN');
2920                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2921                                                  $vmfw_conf, $vmid, 'OUT');
2922                 }
2923             }
2924         };
2925         warn $@ if $@; # just to be sure - should not happen
2926     }
2927
2928     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2929         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2930     }
2931
2932     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2933
2934     return ($ruleset, $ipset_ruleset);
2935 }
2936
2937 sub get_ruleset_status {
2938     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2939
2940     my $statushash = {};
2941
2942     foreach my $chain (sort keys %$ruleset) {
2943         my $sig = &$digest_fn($ruleset->{$chain});
2944
2945         $statushash->{$chain}->{sig} = $sig;
2946
2947         my $oldsig = $active_chains->{$chain};
2948         if (!defined($oldsig)) {
2949             $statushash->{$chain}->{action} = 'create';
2950         } else {
2951             if ($oldsig eq $sig) {
2952                 $statushash->{$chain}->{action} = 'exists';
2953             } else {
2954                 $statushash->{$chain}->{action} = 'update';
2955             }
2956         }
2957         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2958         foreach my $cmd (@{$ruleset->{$chain}}) {
2959             print "\t$cmd\n" if $verbose;
2960         }
2961     }
2962
2963     foreach my $chain (sort keys %$active_chains) {
2964         if (!defined($ruleset->{$chain})) {
2965             my $sig = $active_chains->{$chain};
2966             $statushash->{$chain}->{action} = 'delete';
2967             $statushash->{$chain}->{sig} = $sig;
2968             print "delete $chain ($sig)\n" if $verbose;
2969         }
2970     }
2971
2972     return $statushash;
2973 }
2974
2975 sub print_sig_rule {
2976     my ($chain, $sig) = @_;
2977
2978     # We just use this to store a SHA1 checksum used to detect changes
2979     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2980 }
2981
2982 sub get_ruleset_cmdlist {
2983     my ($ruleset, $verbose) = @_;
2984
2985     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2986
2987     my ($active_chains, $hooks) = iptables_get_chains();
2988     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2989
2990     # create missing chains first
2991     foreach my $chain (sort keys %$ruleset) {
2992         my $stat = $statushash->{$chain};
2993         die "internal error" if !$stat;
2994         next if $stat->{action} ne 'create';
2995
2996         $cmdlist .= ":$chain - [0:0]\n";
2997     }
2998
2999     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3000         my $chain = "PVEFW-$h";
3001         if ($ruleset->{$chain} && !$hooks->{$h}) {
3002             $cmdlist .= "-A $h -j $chain\n";
3003         }
3004     }
3005
3006     foreach my $chain (sort keys %$ruleset) {
3007         my $stat = $statushash->{$chain};
3008         die "internal error" if !$stat;
3009
3010         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3011             $cmdlist .= "-F $chain\n";
3012             foreach my $cmd (@{$ruleset->{$chain}}) {
3013                 $cmdlist .= "$cmd\n";
3014             }
3015             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3016         } elsif ($stat->{action} eq 'delete') {
3017             die "internal error"; # this should not happen
3018         } elsif ($stat->{action} eq 'exists') {
3019             # do nothing
3020         } else {
3021             die "internal error - unknown status '$stat->{action}'";
3022         }
3023     }
3024
3025     foreach my $chain (keys %$statushash) {
3026         next if $statushash->{$chain}->{action} ne 'delete';
3027         $cmdlist .= "-F $chain\n";
3028     }
3029     foreach my $chain (keys %$statushash) {
3030         next if $statushash->{$chain}->{action} ne 'delete';
3031         next if $chain eq 'PVEFW-INPUT';
3032         next if $chain eq 'PVEFW-OUTPUT';
3033         next if $chain eq 'PVEFW-FORWARD';
3034         $cmdlist .= "-X $chain\n";
3035     }
3036
3037     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3038
3039     $cmdlist .= "COMMIT\n";
3040
3041     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3042 }
3043
3044 sub get_ipset_cmdlist {
3045     my ($ruleset, $verbose) = @_;
3046
3047     my $cmdlist = "";
3048
3049     my $delete_cmdlist = "";
3050
3051     my $active_chains = ipset_get_chains();
3052     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3053
3054     # remove stale _swap chains
3055     foreach my $chain (keys %$active_chains) {
3056         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3057             $cmdlist .= "destroy $chain\n";
3058         }
3059     }
3060
3061     foreach my $chain (sort keys %$ruleset) {
3062         my $stat = $statushash->{$chain};
3063         die "internal error" if !$stat;
3064
3065         if ($stat->{action} eq 'create') {
3066             foreach my $cmd (@{$ruleset->{$chain}}) {
3067                 $cmdlist .= "$cmd\n";
3068             }
3069         }
3070
3071         if ($stat->{action} eq 'update') {
3072             my $chain_swap = $chain."_swap";
3073
3074             foreach my $cmd (@{$ruleset->{$chain}}) {
3075                 $cmd =~ s/$chain/$chain_swap/;
3076                 $cmdlist .= "$cmd\n";
3077             }
3078             $cmdlist .= "swap $chain_swap $chain\n";
3079             $cmdlist .= "flush $chain_swap\n";
3080             $cmdlist .= "destroy $chain_swap\n";
3081         }
3082
3083     }
3084
3085     foreach my $chain (keys %$statushash) {
3086         next if $statushash->{$chain}->{action} ne 'delete';
3087
3088         $delete_cmdlist .= "flush $chain\n";
3089         $delete_cmdlist .= "destroy $chain\n";
3090     }
3091
3092     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3093
3094     return ($cmdlist, $delete_cmdlist, $changes);
3095 }
3096
3097 sub apply_ruleset {
3098     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3099
3100     enable_bridge_firewall();
3101
3102     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3103         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3104
3105     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3106
3107     if ($verbose) {
3108         if ($ipset_changes) {
3109             print "ipset changes:\n";
3110             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3111             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3112         }
3113
3114         if ($changes) {
3115             print "iptables changes:\n";
3116             print $cmdlist;
3117         }
3118     }
3119
3120     ipset_restore_cmdlist($ipset_create_cmdlist);
3121
3122     iptables_restore_cmdlist($cmdlist);
3123
3124     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3125
3126     # test: re-read status and check if everything is up to date
3127     my $active_chains = iptables_get_chains();
3128     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3129
3130     my $errors;
3131     foreach my $chain (sort keys %$ruleset) {
3132         my $stat = $statushash->{$chain};
3133         if ($stat->{action} ne 'exists') {
3134             warn "unable to update chain '$chain'\n";
3135             $errors = 1;
3136         }
3137     }
3138
3139     die "unable to apply firewall changes\n" if $errors;
3140
3141     update_nf_conntrack_max($hostfw_conf);
3142
3143     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3144
3145 }
3146
3147 sub update_nf_conntrack_max {
3148     my ($hostfw_conf) = @_;
3149
3150     my $max = 65536; # reasonable default
3151
3152     my $options = $hostfw_conf->{options} || {};
3153
3154     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3155         $max = $options->{nf_conntrack_max};
3156         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3157     }
3158
3159     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3160     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3161
3162     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3163
3164     if ($current != $max) {
3165         my $hashsize = int($max/4);
3166         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3167         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3168     }
3169 }
3170
3171 sub update_nf_conntrack_tcp_timeout_established {
3172     my ($hostfw_conf) = @_;
3173
3174     my $options = $hostfw_conf->{options} || {};
3175
3176     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3177
3178     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3179 }
3180
3181 sub remove_pvefw_chains {
3182
3183     my ($chash, $hooks) = iptables_get_chains();
3184     my $cmdlist = "*filter\n";
3185
3186     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3187         if ($hooks->{$h}) {
3188             $cmdlist .= "-D $h -j PVEFW-$h\n";
3189         }
3190     }
3191
3192     foreach my $chain (keys %$chash) {
3193         $cmdlist .= "-F $chain\n";
3194     }
3195
3196     foreach my $chain (keys %$chash) {
3197         $cmdlist .= "-X $chain\n";
3198     }
3199     $cmdlist .= "COMMIT\n";
3200
3201     iptables_restore_cmdlist($cmdlist);
3202
3203     my $ipset_chains = ipset_get_chains();
3204
3205     $cmdlist = "";
3206
3207     foreach my $chain (keys %$ipset_chains) {
3208        $cmdlist .= "flush $chain\n";
3209        $cmdlist .= "destroy $chain\n";
3210     }
3211
3212     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3213 }
3214
3215 sub init {
3216     my $cluster_conf = load_clusterfw_conf();
3217     my $cluster_options = $cluster_conf->{options};
3218     my $enable = $cluster_options->{enable};
3219
3220     return if !$enable;
3221
3222     # load required modules here
3223 }
3224
3225 sub update {
3226     my $code = sub {
3227
3228         my $cluster_conf = load_clusterfw_conf();
3229         my $cluster_options = $cluster_conf->{options};
3230
3231         if (!$cluster_options->{enable}) {
3232             PVE::Firewall::remove_pvefw_chains();
3233             return;
3234         }
3235
3236         my $hostfw_conf = load_hostfw_conf();
3237
3238         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3239
3240         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3241     };
3242
3243     run_locked($code);
3244 }
3245
3246 1;