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 $rule;
1212 }
1213
1214 sub rules_modify_permissions {
1215     my ($rule_env) = @_;
1216
1217     if ($rule_env eq 'host') {
1218         return {
1219             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1220         };
1221     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1222         return {
1223             check => ['perm', '/', [ 'Sys.Modify' ]],
1224         };
1225     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1226         return {
1227             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1228         }
1229     }
1230
1231     return undef;
1232 }
1233
1234 sub rules_audit_permissions {
1235     my ($rule_env) = @_;
1236
1237     if ($rule_env eq 'host') {
1238         return {
1239             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1240         };
1241     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1242         return {
1243             check => ['perm', '/', [ 'Sys.Audit' ]],
1244         };
1245     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1246         return {
1247             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1248         }
1249     }
1250
1251     return undef;
1252 }
1253
1254 # core functions
1255 my $bridge_firewall_enabled = 0;
1256
1257 sub enable_bridge_firewall {
1258
1259     return if $bridge_firewall_enabled; # only once
1260
1261     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1262     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1263
1264     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1265     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1266
1267     $bridge_firewall_enabled = 1;
1268 }
1269
1270 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1271
1272 sub iptables_restore_cmdlist {
1273     my ($cmdlist) = @_;
1274
1275     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1276 }
1277
1278 sub ipset_restore_cmdlist {
1279     my ($cmdlist) = @_;
1280
1281     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1282 }
1283
1284 sub iptables_get_chains {
1285
1286     my $res = {};
1287
1288     # check what chains we want to track
1289     my $is_pvefw_chain = sub {
1290         my $name = shift;
1291
1292         return 1 if $name =~ m/^PVEFW-\S+$/;
1293
1294         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1295
1296         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1297
1298         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1299
1300         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1301         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1302
1303         return undef;
1304     };
1305
1306     my $table = '';
1307
1308     my $hooks = {};
1309
1310     my $parser = sub {
1311         my $line = shift;
1312
1313         return if $line =~ m/^#/;
1314         return if $line =~ m/^\s*$/;
1315
1316         if ($line =~ m/^\*(\S+)$/) {
1317             $table = $1;
1318             return;
1319         }
1320
1321         return if $table ne 'filter';
1322
1323         if ($line =~ m/^:(\S+)\s/) {
1324             my $chain = $1;
1325             return if !&$is_pvefw_chain($chain);
1326             $res->{$chain} = "unknown";
1327         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1328             my ($chain, $sig) = ($1, $2);
1329             return if !&$is_pvefw_chain($chain);
1330             $res->{$chain} = $sig;
1331         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1332             $hooks->{$1} = 1;
1333         } else {
1334             # simply ignore the rest
1335             return;
1336         }
1337     };
1338
1339     run_command("/sbin/iptables-save", outfunc => $parser);
1340
1341     return wantarray ? ($res, $hooks) : $res;
1342 }
1343
1344 sub iptables_chain_digest {
1345     my ($rules) = @_;
1346     my $digest = Digest::SHA->new('sha1');
1347     foreach my $rule (@$rules) { # order is important
1348         $digest->add($rule);
1349     }
1350     return $digest->b64digest;
1351 }
1352
1353 sub ipset_chain_digest {
1354     my ($rules) = @_;
1355
1356     my $digest = Digest::SHA->new('sha1');
1357     foreach my $rule (sort @$rules) { # note: sorted
1358         $digest->add($rule);
1359     }
1360     return $digest->b64digest;
1361 }
1362
1363 sub ipset_get_chains {
1364
1365     my $res = {};
1366     my $chains = {};
1367
1368     my $parser = sub {
1369         my $line = shift;
1370
1371         return if $line =~ m/^#/;
1372         return if $line =~ m/^\s*$/;
1373         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1374             my $chain = $1;
1375             $line =~ s/\s+$//; # delete trailing white space
1376             push @{$chains->{$chain}}, $line;
1377         } else {
1378             # simply ignore the rest
1379             return;
1380         }
1381     };
1382
1383     run_command("/usr/sbin/ipset save", outfunc => $parser);
1384
1385     # compute digest for each chain
1386     foreach my $chain (keys %$chains) {
1387         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1388     }
1389
1390     return $res;
1391 }
1392
1393 sub ruleset_generate_cmdstr {
1394     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1395
1396     return if defined($rule->{enable}) && !$rule->{enable};
1397     return if $rule->{errors};
1398
1399     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1400
1401     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1402     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1403
1404     my @cmd = ();
1405
1406     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1407     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1408
1409     my $source = $rule->{source};
1410     my $dest = $rule->{dest};
1411
1412     if ($source) {
1413         if ($source =~ m/^\+/) {
1414             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1415                 my $name = $1;
1416                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1417                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1418                     push @cmd, "-m set --match-set ${ipset_chain} src";
1419                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1420                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1421                     push @cmd, "-m set --match-set ${ipset_chain} src";
1422                 } else {
1423                     die "no such ipset '$name'\n";
1424                 }
1425             } else {
1426                 die "invalid security group name '$source'\n";
1427             }
1428         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1429             my $alias = lc($source);
1430             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1431             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1432             die "no such alias '$source'\n" if !$e;
1433             push @cmd, "-s $e->{cidr}";
1434         } elsif ($source =~ m/\-/){
1435             push @cmd, "-m iprange --src-range $source";
1436         } else {
1437             push @cmd, "-s $source";
1438         }
1439     }
1440
1441     if ($dest) {
1442         if ($dest =~ m/^\+/) {
1443             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1444                 my $name = $1;
1445                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1446                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1447                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1448                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1449                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1450                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1451                 } else {
1452                     die "no such ipset '$name'\n";
1453                 }
1454             } else {
1455                 die "invalid security group name '$dest'\n";
1456             }
1457         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1458             my $alias = lc($dest);
1459             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1460             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1461             die "no such alias '$dest'\n" if !$e;
1462             push @cmd, "-d $e->{cidr}";
1463         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1464             push @cmd, "-m iprange --dst-range $dest";
1465         } else {
1466             push @cmd, "-d $dest";
1467         }
1468     }
1469
1470     if ($rule->{proto}) {
1471         push @cmd, "-p $rule->{proto}";
1472
1473         my $multiport = 0;
1474         $multiport++ if $nbdport > 1;
1475         $multiport++ if $nbsport > 1;
1476
1477         push @cmd, "--match multiport" if $multiport;
1478
1479         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1480             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1481
1482         if ($rule->{dport}) {
1483             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1484                 # Note: we use dport to store --icmp-type
1485                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1486                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1487             } else {
1488                 if ($nbdport > 1) {
1489                     if ($multiport == 2) {
1490                         push @cmd,  "--ports $rule->{dport}";
1491                     } else {
1492                         push @cmd, "--dports $rule->{dport}";
1493                     }
1494                 } else {
1495                     push @cmd, "--dport $rule->{dport}";
1496                 }
1497             }
1498         }
1499
1500         if ($rule->{sport}) {
1501             if ($nbsport > 1) {
1502                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1503             } else {
1504                 push @cmd, "--sport $rule->{sport}";
1505             }
1506         }
1507     } elsif ($rule->{dport} || $rule->{sport}) {
1508         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1509         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1510     }
1511
1512     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1513
1514     if (my $action = $rule->{action}) {
1515         $action = $actions->{$action} if defined($actions->{$action});
1516         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1517         push @cmd, $goto ? "-g $action" : "-j $action";
1518     }
1519
1520     return scalar(@cmd) ? join(' ', @cmd) : undef;
1521 }
1522
1523 sub ruleset_generate_rule {
1524     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1525
1526     my $rules;
1527
1528     if ($rule->{macro}) {
1529         $rules = &$apply_macro($rule->{macro}, $rule);
1530     } else {
1531         $rules = [ $rule ];
1532     }
1533
1534     # update all or nothing
1535
1536     my @cmds = ();
1537     foreach my $tmp (@$rules) {
1538         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1539             push @cmds, $cmdstr;
1540         }
1541     }
1542
1543     foreach my $cmdstr (@cmds) {
1544         ruleset_addrule($ruleset, $chain, $cmdstr);
1545     }
1546 }
1547
1548 sub ruleset_generate_rule_insert {
1549     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1550
1551     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1552
1553     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1554         ruleset_insertrule($ruleset, $chain, $cmdstr);
1555     }
1556 }
1557
1558 sub ruleset_create_chain {
1559     my ($ruleset, $chain) = @_;
1560
1561     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1562     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1563
1564     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1565
1566     $ruleset->{$chain} = [];
1567 }
1568
1569 sub ruleset_chain_exist {
1570     my ($ruleset, $chain) = @_;
1571
1572     return $ruleset->{$chain} ? 1 : undef;
1573 }
1574
1575 sub ruleset_addrule {
1576    my ($ruleset, $chain, $rule) = @_;
1577
1578    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1579
1580    push @{$ruleset->{$chain}}, "-A $chain $rule";
1581 }
1582
1583 sub ruleset_insertrule {
1584    my ($ruleset, $chain, $rule) = @_;
1585
1586    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1587
1588    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1589 }
1590
1591 sub get_log_rule_base {
1592     my ($chain, $vmid, $msg, $loglevel) = @_;
1593
1594     die "internal error - no log level" if !defined($loglevel);
1595
1596     $vmid = 0 if !defined($vmid);
1597
1598     # Note: we use special format for prefix to pass further
1599     # info to log daemon (VMID, LOGVELEL and CHAIN)
1600
1601     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1602 }
1603
1604 sub ruleset_addlog {
1605     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1606
1607     return if !defined($loglevel);
1608
1609     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1610
1611     $logrule = "$rule $logrule" if defined($rule);
1612
1613     ruleset_addrule($ruleset, $chain, $logrule);
1614 }
1615
1616 sub ruleset_add_chain_policy {
1617     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1618
1619     if ($policy eq 'ACCEPT') {
1620
1621         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1622                               { ACCEPT =>  $accept_action});
1623
1624     } elsif ($policy eq 'DROP') {
1625
1626         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1627
1628         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1629
1630         ruleset_addrule($ruleset, $chain, "-j DROP");
1631     } elsif ($policy eq 'REJECT') {
1632         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1633
1634         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1635
1636         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1637     } else {
1638         # should not happen
1639         die "internal error: unknown policy '$policy'";
1640     }
1641 }
1642
1643 sub ruleset_chain_add_conn_filters {
1644     my ($ruleset, $chain, $accept) = @_;
1645
1646     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1647     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1648 }
1649
1650 sub ruleset_chain_add_input_filters {
1651     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1652
1653     if ($cluster_conf->{ipset}->{blacklist}){
1654         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1655             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1656             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1657             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1658         }
1659         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1660         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1661     }
1662
1663     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1664         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1665     }
1666
1667     if ($options->{tcpflags}) {
1668         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1669     }
1670 }
1671
1672 sub ruleset_create_vm_chain {
1673     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1674
1675     ruleset_create_chain($ruleset, $chain);
1676     my $accept = generate_nfqueue($options);
1677
1678     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1679         if ($direction eq 'OUT') {
1680             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1681                                                       proto => 'udp', sport => 68, dport => 67 });
1682         } else {
1683             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1684                                                       proto => 'udp', sport => 67, dport => 68 });
1685         }
1686     }
1687
1688     if ($direction eq 'OUT') {
1689         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1690             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1691         }
1692         if ($ipfilter_ipset) {
1693             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1694         }
1695         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1696     }
1697 }
1698
1699 sub ruleset_add_group_rule {
1700     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1701
1702     my $group = $rule->{action};
1703     my $group_chain = "GROUP-$group-$direction";
1704     if(!ruleset_chain_exist($ruleset, $group_chain)){
1705         generate_group_rules($ruleset, $cluster_conf, $group);
1706     }
1707
1708     if ($direction eq 'OUT' && $rule->{iface_out}) {
1709         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1710     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1711         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1712     } else {
1713         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1714     }
1715
1716     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1717 }
1718
1719 sub ruleset_generate_vm_rules {
1720     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1721
1722     my $lc_direction = lc($direction);
1723
1724     my $in_accept = generate_nfqueue($options);
1725
1726     foreach my $rule (@$rules) {
1727         next if $rule->{iface} && $rule->{iface} ne $netid;
1728         next if !$rule->{enable} || $rule->{errors};
1729         if ($rule->{type} eq 'group') {
1730             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1731                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1732         } else {
1733             next if $rule->{type} ne $lc_direction;
1734             eval {
1735                 if ($direction eq 'OUT') {
1736                     ruleset_generate_rule($ruleset, $chain, $rule,
1737                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1738                                           undef, $cluster_conf, $vmfw_conf);
1739                 } else {
1740                     ruleset_generate_rule($ruleset, $chain, $rule,
1741                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1742                                           undef, $cluster_conf, $vmfw_conf);
1743                 }
1744             };
1745             warn $@ if $@;
1746         }
1747     }
1748 }
1749
1750 sub generate_nfqueue {
1751     my ($options) = @_;
1752
1753     if ($options->{ips}) {
1754         my $action = "NFQUEUE";
1755         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1756             if (defined($3) && defined($1)) {
1757                 $action .= " --queue-balance $1:$3";
1758             } elsif (defined($1)) {
1759                 $action .= " --queue-num $1";
1760             }
1761         }
1762         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1763         return $action;
1764     } else {
1765         return "ACCEPT";
1766     }
1767 }
1768
1769 sub ruleset_generate_vm_ipsrules {
1770     my ($ruleset, $options, $direction, $iface) = @_;
1771
1772     if ($options->{ips} && $direction eq 'IN') {
1773         my $nfqueue = generate_nfqueue($options);
1774
1775         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1776             ruleset_create_chain($ruleset, "PVEFW-IPS");
1777         }
1778
1779         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1780     }
1781 }
1782
1783 sub generate_venet_rules_direction {
1784     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1785
1786     my $lc_direction = lc($direction);
1787
1788     my $rules = $vmfw_conf->{rules};
1789
1790     my $options = $vmfw_conf->{options};
1791     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1792
1793     my $chain = "venet0-$vmid-$direction";
1794
1795     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1796
1797     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1798
1799     # implement policy
1800     my $policy;
1801
1802     if ($direction eq 'OUT') {
1803         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1804     } else {
1805         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1806     }
1807
1808     my $accept = generate_nfqueue($options);
1809     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1810     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1811
1812     if ($direction eq 'OUT') {
1813         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1814             action => $chain,
1815             source => $ip,
1816             iface_in => 'venet0'});
1817     } else {
1818         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1819             action => $chain,
1820             dest => $ip,
1821             iface_out => 'venet0'});
1822     }
1823 }
1824
1825 sub generate_tap_rules_direction {
1826     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1827
1828     my $lc_direction = lc($direction);
1829
1830     my $rules = $vmfw_conf->{rules};
1831
1832     my $options = $vmfw_conf->{options};
1833     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1834
1835     my $tapchain = "$iface-$direction";
1836
1837     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1838     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1839         if $vmfw_conf->{ipset}->{$ipfilter_name};
1840
1841     # create chain with mac and ip filter
1842     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1843
1844     if ($options->{enable}) {
1845         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1846
1847         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1848
1849         # implement policy
1850         my $policy;
1851
1852         if ($direction eq 'OUT') {
1853             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1854         } else {
1855         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1856         }
1857
1858         my $accept = generate_nfqueue($options);
1859         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1860         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1861     } else {
1862         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1863         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1864     }
1865
1866     # plug the tap chain to bridge chain
1867     if ($direction eq 'IN') {
1868         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1869                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1870     } else {
1871         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1872                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1873     }
1874 }
1875
1876 sub enable_host_firewall {
1877     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1878
1879     my $options = $hostfw_conf->{options};
1880     my $cluster_options = $cluster_conf->{options};
1881     my $rules = $hostfw_conf->{rules};
1882     my $cluster_rules = $cluster_conf->{rules};
1883
1884     # host inbound firewall
1885     my $chain = "PVEFW-HOST-IN";
1886     ruleset_create_chain($ruleset, $chain);
1887
1888     my $loglevel = get_option_log_level($options, "log_level_in");
1889
1890     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1891
1892     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1893     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1894
1895     # we use RETURN because we need to check also tap rules
1896     my $accept_action = 'RETURN';
1897
1898     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1899
1900     # add host rules first, so that cluster wide rules can be overwritten
1901     foreach my $rule (@$rules, @$cluster_rules) {
1902         next if !$rule->{enable} || $rule->{errors};
1903
1904         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1905
1906         eval {
1907             if ($rule->{type} eq 'group') {
1908                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1909             } elsif ($rule->{type} eq 'in') {
1910                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1911                                       undef, $cluster_conf, $hostfw_conf);
1912             }
1913         };
1914         warn $@ if $@;
1915         delete $rule->{iface_in};
1916     }
1917
1918     # allow standard traffic for management ipset (includes cluster network)
1919     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1920     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1921     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1922     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1923     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1924     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1925
1926     my $localnet = local_network();
1927
1928     # corosync
1929     if ($localnet) {
1930         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1931         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1932         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1933     }
1934
1935     # implement input policy
1936     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1937     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1938
1939     # host outbound firewall
1940     $chain = "PVEFW-HOST-OUT";
1941     ruleset_create_chain($ruleset, $chain);
1942
1943     $loglevel = get_option_log_level($options, "log_level_out");
1944
1945     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1946
1947     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1948
1949     # we use RETURN because we may want to check other thigs later
1950     $accept_action = 'RETURN';
1951
1952     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1953
1954     # add host rules first, so that cluster wide rules can be overwritten
1955     foreach my $rule (@$rules, @$cluster_rules) {
1956         next if !$rule->{enable} || $rule->{errors};
1957
1958         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1959         eval {
1960             if ($rule->{type} eq 'group') {
1961                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1962             } elsif ($rule->{type} eq 'out') {
1963                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1964                                       undef, $cluster_conf, $hostfw_conf);
1965             }
1966         };
1967         warn $@ if $@;
1968         delete $rule->{iface_out};
1969     }
1970
1971     # allow standard traffic on cluster network
1972     if ($localnet) {
1973         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1974         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1975         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1976         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1977
1978         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1979         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1980         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1981     }
1982
1983     # implement output policy
1984     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1985     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1986
1987     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1988     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1989 }
1990
1991 sub generate_group_rules {
1992     my ($ruleset, $cluster_conf, $group) = @_;
1993
1994     my $rules = $cluster_conf->{groups}->{$group};
1995
1996     if (!$rules) {
1997         warn "no such security group '$group'\n";
1998         $rules = []; # create empty chain
1999     }
2000
2001     my $chain = "GROUP-${group}-IN";
2002
2003     ruleset_create_chain($ruleset, $chain);
2004     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2005
2006     foreach my $rule (@$rules) {
2007         next if $rule->{type} ne 'in';
2008         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2009     }
2010
2011     $chain = "GROUP-${group}-OUT";
2012
2013     ruleset_create_chain($ruleset, $chain);
2014     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2015
2016     foreach my $rule (@$rules) {
2017         next if $rule->{type} ne 'out';
2018         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2019         # check also other tap rules later
2020         ruleset_generate_rule($ruleset, $chain, $rule,
2021                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2022     }
2023 }
2024
2025 my $MAX_NETS = 32;
2026 my $valid_netdev_names = {};
2027 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2028     $valid_netdev_names->{"net$i"} = 1;
2029 }
2030
2031 sub parse_fw_rule {
2032     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2033
2034     my $orig_line = $line;
2035
2036     my $rule = {};
2037
2038     # we can add single line comments to the end of the rule
2039     if ($line =~ s/#\s*(.*?)\s*$//) {
2040         $rule->{comment} = decode('utf8', $1);
2041     }
2042
2043     # we can disable a rule when prefixed with '|'
2044
2045     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2046
2047     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2048         die "unable to parse rule: $line\n";
2049
2050     $rule->{type} = lc($1);
2051     $rule->{action} = $2;
2052
2053     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2054         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2055             $rule->{macro} = $1;
2056             $rule->{action} = $2;
2057         }
2058     }
2059
2060     while (length($line)) {
2061         if ($line =~ s/^-i (\S+)\s*//) {
2062             $rule->{iface} = $1;
2063             next;
2064         }
2065
2066         last if $rule->{type} eq 'group';
2067
2068         if ($line =~ s/^-p (\S+)\s*//) {
2069             $rule->{proto} = $1;
2070             next;
2071         }
2072
2073         if ($line =~ s/^-dport (\S+)\s*//) {
2074             $rule->{dport} = $1;
2075             next;
2076         }
2077
2078         if ($line =~ s/^-sport (\S+)\s*//) {
2079             $rule->{sport} = $1;
2080             next;
2081         }
2082         if ($line =~ s/^-source (\S+)\s*//) {
2083             $rule->{source} = $1;
2084             next;
2085         }
2086         if ($line =~ s/^-dest (\S+)\s*//) {
2087             $rule->{dest} = $1;
2088             next;
2089         }
2090
2091         last;
2092     }
2093
2094     die "unable to parse rule parameters: $line\n" if length($line);
2095
2096     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2097     if ($verbose && $rule->{errors}) {
2098         warn "$prefix - errors in rule parameters: $orig_line\n";
2099         foreach my $p (keys %{$rule->{errors}}) {
2100             warn "  $p: $rule->{errors}->{$p}\n";
2101         }
2102     }
2103
2104     return $rule;
2105 }
2106
2107 sub parse_vmfw_option {
2108     my ($line) = @_;
2109
2110     my ($opt, $value);
2111
2112     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2113
2114     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2115         $opt = lc($1);
2116         $value = int($2);
2117     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2118         $opt = lc($1);
2119         $value = $2 ? lc($3) : '';
2120     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2121         $opt = lc($1);
2122         $value = uc($3);
2123     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2124         $opt = lc($1);
2125         $value = $2;
2126     } else {
2127         die "can't parse option '$line'\n"
2128     }
2129
2130     return ($opt, $value);
2131 }
2132
2133 sub parse_hostfw_option {
2134     my ($line) = @_;
2135
2136     my ($opt, $value);
2137
2138     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2139
2140     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2141         $opt = lc($1);
2142         $value = int($2);
2143     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2144         $opt = lc($1);
2145         $value = $2 ? lc($3) : '';
2146     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2147         $opt = lc($1);
2148         $value = int($2);
2149     } else {
2150         die "can't parse option '$line'\n"
2151     }
2152
2153     return ($opt, $value);
2154 }
2155
2156 sub parse_clusterfw_option {
2157     my ($line) = @_;
2158
2159     my ($opt, $value);
2160
2161     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2162         $opt = lc($1);
2163         $value = int($2);
2164     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2165         $opt = lc($1);
2166         $value = uc($3);
2167     } else {
2168         die "can't parse option '$line'\n"
2169     }
2170
2171     return ($opt, $value);
2172 }
2173
2174 sub resolve_alias {
2175     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2176
2177     if ($cidr !~ m/^\d/) {
2178         my $alias = lc($cidr);
2179         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2180         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2181         return $e->{cidr} if $e;
2182
2183         die "no such alias '$cidr'\n";
2184     }
2185
2186     return $cidr;
2187 }
2188
2189 sub parse_alias {
2190     my ($line) = @_;
2191
2192     # we can add single line comments to the end of the line
2193     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2194
2195     if ($line =~ m/^(\S+)\s(\S+)$/) {
2196         my ($name, $cidr) = ($1, $2);
2197         $cidr =~ s|/32$||;
2198         pve_verify_ipv4_or_cidr($cidr);
2199         my $data = {
2200             name => $name,
2201             cidr => $cidr,
2202         };
2203         $data->{comment} = $comment  if $comment;
2204         return $data;
2205     }
2206
2207     return undef;
2208 }
2209
2210 sub generic_fw_config_parser {
2211     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2212
2213     my $section;
2214     my $group;
2215
2216     my $res = $empty_conf;
2217
2218     while (defined(my $line = <$fh>)) {
2219         next if $line =~ m/^#/;
2220         next if $line =~ m/^\s*$/;
2221
2222         chomp $line;
2223
2224         my $linenr = $fh->input_line_number();
2225         my $prefix = "$filename (line $linenr)";
2226
2227         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2228             $section = 'options';
2229             next;
2230         }
2231
2232         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2233             $section = 'aliases';
2234             next;
2235         }
2236
2237         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2238             $section = 'groups';
2239             $group = lc($1);
2240             my $comment = $2;
2241             eval {
2242                 die "security group name too long\n" if length($group) > $max_group_name_length;
2243                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2244             };
2245             if (my $err = $@) {
2246                 ($section, $group, $comment) = undef;
2247                 warn "$prefix: $err";
2248                 next;
2249             }
2250
2251             $res->{$section}->{$group} = [];
2252             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2253                 if $comment;
2254             next;
2255         }
2256
2257         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2258             $section = 'rules';
2259             next;
2260         }
2261
2262         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2263             $section = 'ipset';
2264             $group = lc($1);
2265             my $comment = $2;
2266             eval {
2267                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2268                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2269             };
2270             if (my $err = $@) {
2271                 ($section, $group, $comment) = undef;
2272                 warn "$prefix: $err";
2273                 next;
2274             }
2275
2276             $res->{$section}->{$group} = [];
2277             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2278                 if $comment;
2279             next;
2280         }
2281
2282         if (!$section) {
2283             warn "$prefix: skip line - no section\n";
2284             next;
2285         }
2286
2287         if ($section eq 'options') {
2288             eval {
2289                 my ($opt, $value);
2290                 if ($rule_env eq 'cluster') {
2291                     ($opt, $value) = parse_clusterfw_option($line);
2292                 } elsif ($rule_env eq 'host') {
2293                     ($opt, $value) = parse_hostfw_option($line);
2294                 } else {
2295                     ($opt, $value) = parse_vmfw_option($line);
2296                 }
2297                 $res->{options}->{$opt} = $value;
2298             };
2299             warn "$prefix: $@" if $@;
2300         } elsif ($section eq 'aliases') {
2301             eval {
2302                 my $data = parse_alias($line);
2303                 $res->{aliases}->{lc($data->{name})} = $data;
2304             };
2305             warn "$prefix: $@" if $@;
2306         } elsif ($section eq 'rules') {
2307             my $rule;
2308             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2309             if (my $err = $@) {
2310                 warn "$prefix: $err";
2311                 next;
2312             }
2313             push @{$res->{$section}}, $rule;
2314         } elsif ($section eq 'groups') {
2315             my $rule;
2316             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2317             if (my $err = $@) {
2318                 warn "$prefix: $err";
2319                 next;
2320             }
2321             push @{$res->{$section}->{$group}}, $rule;
2322         } elsif ($section eq 'ipset') {
2323             # we can add single line comments to the end of the rule
2324             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2325
2326             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2327             my $nomatch = $1;
2328             my $cidr = $2;
2329             my $errors;
2330
2331             if ($nomatch && !$feature_ipset_nomatch) {
2332                 $errors->{nomatch} = "nomatch not supported by kernel";
2333             }
2334
2335             eval {
2336                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2337                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2338                 } else {
2339                     $cidr =~ s|/32$||;
2340                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2341                 }
2342             };
2343             if (my $err = $@) {
2344                 chomp $err;
2345                 $errors->{cidr} = $err;
2346             }
2347
2348             my $entry = { cidr => $cidr };
2349             $entry->{nomatch} = 1 if $nomatch;
2350             $entry->{comment} = $comment if $comment;
2351             $entry->{errors} =  $errors if $errors;
2352
2353             if ($verbose && $errors) {
2354                 warn "$prefix - errors in ipset '$group': $line\n";
2355                 foreach my $p (keys %{$errors}) {
2356                     warn "  $p: $errors->{$p}\n";
2357                 }
2358             }
2359
2360             push @{$res->{$section}->{$group}}, $entry;
2361         } else {
2362             warn "$prefix: skip line - unknown section\n";
2363             next;
2364         }
2365     }
2366
2367     return $res;
2368 }
2369
2370 sub parse_hostfw_config {
2371     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2372
2373     my $empty_conf = { rules => [], options => {}};
2374
2375     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2376 }
2377
2378 sub parse_vmfw_config {
2379     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2380
2381     my $empty_conf = {
2382         rules => [],
2383         options => {},
2384         aliases => {},
2385         ipset => {} ,
2386         ipset_comments => {},
2387     };
2388
2389     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2390 }
2391
2392 sub parse_clusterfw_config {
2393     my ($filename, $fh, $verbose) = @_;
2394
2395     my $section;
2396     my $group;
2397
2398     my $empty_conf = {
2399         rules => [],
2400         options => {},
2401         aliases => {},
2402         groups => {},
2403         group_comments => {},
2404         ipset => {} ,
2405         ipset_comments => {},
2406     };
2407
2408     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2409 }
2410
2411 sub run_locked {
2412     my ($code, @param) = @_;
2413
2414     my $timeout = 10;
2415
2416     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2417
2418     die $@ if $@;
2419
2420     return $res;
2421 }
2422
2423 sub read_local_vm_config {
2424
2425     my $openvz = {};
2426     my $qemu = {};
2427
2428     my $vmdata = { openvz => $openvz, qemu => $qemu };
2429
2430     my $vmlist = PVE::Cluster::get_vmlist();
2431     return $vmdata if !$vmlist || !$vmlist->{ids};
2432     my $ids = $vmlist->{ids};
2433
2434     foreach my $vmid (keys %$ids) {
2435         next if !$vmid; # skip VE0
2436         my $d = $ids->{$vmid};
2437         next if !$d->{node} || $d->{node} ne $nodename;
2438         next if !$d->{type};
2439         if ($d->{type} eq 'openvz') {
2440             if ($have_pve_manager) {
2441                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2442                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2443                     $openvz->{$vmid} = $conf;
2444                 }
2445             }
2446         } elsif ($d->{type} eq 'qemu') {
2447             if ($have_qemu_server) {
2448                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2449                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2450                     $qemu->{$vmid} = $conf;
2451                 }
2452             }
2453         }
2454     }
2455
2456     return $vmdata;
2457 };
2458
2459 sub load_vmfw_conf {
2460     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2461
2462     my $vmfw_conf = {};
2463
2464     $dir = $pvefw_conf_dir if !defined($dir);
2465
2466     my $filename = "$dir/$vmid.fw";
2467     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2468         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2469         $vmfw_conf->{vmid} = $vmid;
2470     }
2471
2472     return $vmfw_conf;
2473 }
2474
2475 my $format_rules = sub {
2476     my ($rules, $allow_iface) = @_;
2477
2478     my $raw = '';
2479
2480     foreach my $rule (@$rules) {
2481         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2482             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2483             $raw .= uc($rule->{type});
2484             if ($rule->{macro}) {
2485                 $raw .= " $rule->{macro}($rule->{action})";
2486             } else {
2487                 $raw .= " " . $rule->{action};
2488             }
2489             if ($allow_iface && $rule->{iface}) {
2490                 $raw .= " -i $rule->{iface}";
2491             }
2492
2493             if ($rule->{type} ne  'group')  {
2494                 $raw .= " -source $rule->{source}" if $rule->{source};
2495                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2496                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2497                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2498                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2499             }
2500
2501             $raw .= " # " . encode('utf8', $rule->{comment})
2502                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2503             $raw .= "\n";
2504         } else {
2505             die "unknown rule type '$rule->{type}'";
2506         }
2507     }
2508
2509     return $raw;
2510 };
2511
2512 my $format_options = sub {
2513     my ($options) = @_;
2514
2515     my $raw = '';
2516
2517     $raw .= "[OPTIONS]\n\n";
2518     foreach my $opt (keys %$options) {
2519         $raw .= "$opt: $options->{$opt}\n";
2520     }
2521     $raw .= "\n";
2522
2523     return $raw;
2524 };
2525
2526 my $format_aliases = sub {
2527     my ($aliases) = @_;
2528
2529     my $raw = '';
2530
2531     $raw .= "[ALIASES]\n\n";
2532     foreach my $k (keys %$aliases) {
2533         my $e = $aliases->{$k};
2534         $raw .= "$e->{name} $e->{cidr}";
2535         $raw .= " # " . encode('utf8', $e->{comment})
2536             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2537         $raw .= "\n";
2538     }
2539     $raw .= "\n";
2540
2541     return $raw;
2542 };
2543
2544 my $format_ipsets = sub {
2545     my ($fw_conf) = @_;
2546
2547     my $raw = '';
2548
2549     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2550         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2551             my $utf8comment = encode('utf8', $comment);
2552             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2553         } else {
2554             $raw .= "[IPSET $ipset]\n\n";
2555         }
2556         my $options = $fw_conf->{ipset}->{$ipset};
2557
2558         my $nethash = {};
2559         foreach my $entry (@$options) {
2560             $nethash->{$entry->{cidr}} = $entry;
2561         }
2562
2563         foreach my $cidr (sort keys %$nethash) {
2564             my $entry = $nethash->{$cidr};
2565             my $line = $entry->{nomatch} ? '!' : '';
2566             $line .= $entry->{cidr};
2567             $line .= " # " . encode('utf8', $entry->{comment})
2568                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2569             $raw .= "$line\n";
2570         }
2571
2572         $raw .= "\n";
2573     }
2574
2575     return $raw;
2576 };
2577
2578 sub save_vmfw_conf {
2579     my ($vmid, $vmfw_conf) = @_;
2580
2581     my $raw = '';
2582
2583     my $options = $vmfw_conf->{options};
2584     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2585
2586     my $aliases = $vmfw_conf->{aliases};
2587     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2588
2589     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2590
2591     my $rules = $vmfw_conf->{rules} || [];
2592     if ($rules && scalar(@$rules)) {
2593         $raw .= "[RULES]\n\n";
2594         $raw .= &$format_rules($rules, 1);
2595         $raw .= "\n";
2596     }
2597
2598     mkdir $pvefw_conf_dir;
2599
2600     my $filename = "$pvefw_conf_dir/$vmid.fw";
2601     PVE::Tools::file_set_contents($filename, $raw);
2602 }
2603
2604 sub read_vm_firewall_configs {
2605     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2606
2607     my $vmfw_configs = {};
2608
2609     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2610         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2611         next if !$vmfw_conf->{options}; # skip if file does not exists
2612         $vmfw_configs->{$vmid} = $vmfw_conf;
2613     }
2614     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2615         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2616         next if !$vmfw_conf->{options}; # skip if file does not exists
2617         $vmfw_configs->{$vmid} = $vmfw_conf;
2618     }
2619
2620     return $vmfw_configs;
2621 }
2622
2623 sub get_option_log_level {
2624     my ($options, $k) = @_;
2625
2626     my $v = $options->{$k};
2627     $v = $default_log_level if !defined($v);
2628
2629     return undef if $v eq '' || $v eq 'nolog';
2630
2631     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2632
2633     return $v if ($v >= 0) && ($v <= 7);
2634
2635     warn "unknown log level ($k = '$v')\n";
2636
2637     return undef;
2638 }
2639
2640 sub generate_std_chains {
2641     my ($ruleset, $options) = @_;
2642
2643     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2644
2645     # same as shorewall smurflog.
2646     my $chain = 'PVEFW-smurflog';
2647     $pve_std_chains->{$chain} = [];
2648
2649     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2650     push @{$pve_std_chains->{$chain}}, "-j DROP";
2651
2652     # same as shorewall logflags action.
2653     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2654     $chain = 'PVEFW-logflags';
2655     $pve_std_chains->{$chain} = [];
2656
2657     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2658     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2659     push @{$pve_std_chains->{$chain}}, "-j DROP";
2660
2661     foreach my $chain (keys %$pve_std_chains) {
2662         ruleset_create_chain($ruleset, $chain);
2663         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2664             if (ref($rule)) {
2665                 ruleset_generate_rule($ruleset, $chain, $rule);
2666             } else {
2667                 ruleset_addrule($ruleset, $chain, $rule);
2668             }
2669         }
2670     }
2671 }
2672
2673 sub generate_ipset_chains {
2674     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2675
2676     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2677         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2678         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2679     }
2680 }
2681
2682 sub generate_ipset {
2683     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2684
2685     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2686
2687     my $hashsize = scalar(@$options);
2688     if ($hashsize <= 64) {
2689         $hashsize = 64;
2690     } else {
2691         $hashsize = round_powerof2($hashsize);
2692     }
2693
2694     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2695
2696     # remove duplicates
2697     my $nethash = {};
2698     foreach my $entry (@$options) {
2699         next if $entry->{errors}; # skip entries with errors
2700         eval {
2701             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2702             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2703         };
2704         warn $@ if $@;
2705     }
2706
2707     foreach my $cidr (sort keys %$nethash) {
2708         my $entry = $nethash->{$cidr};
2709
2710         my $cmd = "add $name $cidr";
2711         if ($entry->{nomatch}) {
2712             if ($feature_ipset_nomatch) {
2713                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2714             } else {
2715                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2716             }
2717         } else {
2718             push @{$ipset_ruleset->{$name}}, $cmd;
2719         }
2720     }
2721 }
2722
2723 sub round_powerof2 {
2724     my ($int) = @_;
2725
2726     $int--;
2727     $int |= $int >> $_ foreach (1,2,4,8,16);
2728     return ++$int;
2729 }
2730
2731 sub load_clusterfw_conf {
2732     my ($filename, $verbose) = @_;
2733
2734     $filename = $clusterfw_conf_filename if !defined($filename);
2735
2736     my $cluster_conf = {};
2737     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2738         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2739     }
2740
2741     return $cluster_conf;
2742 }
2743
2744 sub save_clusterfw_conf {
2745     my ($cluster_conf) = @_;
2746
2747     my $raw = '';
2748
2749     my $options = $cluster_conf->{options};
2750     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2751
2752     my $aliases = $cluster_conf->{aliases};
2753     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2754
2755     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2756
2757     my $rules = $cluster_conf->{rules};
2758     if ($rules && scalar(@$rules)) {
2759         $raw .= "[RULES]\n\n";
2760         $raw .= &$format_rules($rules, 1);
2761         $raw .= "\n";
2762     }
2763
2764     if ($cluster_conf->{groups}) {
2765         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2766             my $rules = $cluster_conf->{groups}->{$group};
2767             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2768                 my $utf8comment = encode('utf8', $comment);
2769                 $raw .= "[group $group] # $utf8comment\n\n";
2770             } else {
2771                 $raw .= "[group $group]\n\n";
2772             }
2773
2774             $raw .= &$format_rules($rules, 0);
2775             $raw .= "\n";
2776         }
2777     }
2778
2779     mkdir $pvefw_conf_dir;
2780     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2781 }
2782
2783 sub load_hostfw_conf {
2784     my ($cluster_conf, $filename, $verbose) = @_;
2785
2786     $filename = $hostfw_conf_filename if !defined($filename);
2787
2788     my $hostfw_conf = {};
2789     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2790         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2791     }
2792     return $hostfw_conf;
2793 }
2794
2795 sub save_hostfw_conf {
2796     my ($hostfw_conf) = @_;
2797
2798     my $raw = '';
2799
2800     my $options = $hostfw_conf->{options};
2801     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2802
2803     my $rules = $hostfw_conf->{rules};
2804     if ($rules && scalar(@$rules)) {
2805         $raw .= "[RULES]\n\n";
2806         $raw .= &$format_rules($rules, 1);
2807         $raw .= "\n";
2808     }
2809
2810     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2811 }
2812
2813 sub compile {
2814     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2815
2816     my $vmfw_configs;
2817
2818     if ($vmdata) { # test mode
2819         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2820         my $filename = "$testdir/cluster.fw";
2821         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2822
2823         $filename = "$testdir/host.fw";
2824         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2825
2826         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2827     } else { # normal operation
2828         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2829
2830         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2831
2832         $vmdata = read_local_vm_config();
2833         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2834     }
2835
2836     $cluster_conf->{ipset}->{venet0} = [];
2837     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2838
2839     my $localnet;
2840     if ($cluster_conf->{aliases}->{local_network}) {
2841         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2842     } else {
2843         $localnet = local_network() || '127.0.0.0/8';
2844         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2845     }
2846
2847     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2848
2849     return ({}, {}) if !$cluster_conf->{options}->{enable};
2850
2851     my $ruleset = {};
2852
2853     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2854     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2855
2856     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2857
2858     my $hostfw_options = $hostfw_conf->{options} || {};
2859
2860     # fixme: what log level should we use here?
2861     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2862
2863     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2864
2865
2866     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2867     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2868     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2869
2870     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2871     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2872
2873     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2874
2875     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2876     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2877
2878     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2879     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2880
2881     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2882
2883     generate_std_chains($ruleset, $hostfw_options);
2884
2885     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2886
2887     my $ipset_ruleset = {};
2888
2889     if ($hostfw_enable) {
2890         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2891         warn $@ if $@; # just to be sure - should not happen
2892     }
2893
2894     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2895
2896     # generate firewall rules for QEMU VMs
2897     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2898         eval {
2899             my $conf = $vmdata->{qemu}->{$vmid};
2900             my $vmfw_conf = $vmfw_configs->{$vmid};
2901             return if !$vmfw_conf;
2902
2903             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2904
2905             foreach my $netid (keys %$conf) {
2906                 next if $netid !~ m/^net(\d+)$/;
2907                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2908                 next if !$net->{firewall};
2909                 my $iface = "tap${vmid}i$1";
2910
2911                 my $macaddr = $net->{macaddr};
2912                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2913                                              $vmfw_conf, $vmid, 'IN');
2914                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2915                                              $vmfw_conf, $vmid, 'OUT');
2916             }
2917         };
2918         warn $@ if $@; # just to be sure - should not happen
2919     }
2920
2921     # generate firewall rules for OpenVZ containers
2922     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2923         eval {
2924             my $conf = $vmdata->{openvz}->{$vmid};
2925
2926             my $vmfw_conf = $vmfw_configs->{$vmid};
2927             return if !$vmfw_conf;
2928
2929             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2930
2931             if ($vmfw_conf->{options}->{enable}) {
2932                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2933                     my $ip = $conf->{ip_address}->{value};
2934                     $ip =~ s/\s+/,/g;
2935                     parse_address_list($ip); # make sure we have a valid $ip list
2936
2937                     my @ips = split(',', $ip);
2938
2939                     foreach my $singleip (@ips) {
2940                         my $venet0ipset = {};
2941                         $venet0ipset->{cidr} = $singleip;
2942                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2943                     }
2944
2945                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2946                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2947                 }
2948             }
2949
2950             if ($conf->{netif} && $conf->{netif}->{value}) {
2951                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2952                 foreach my $netid (keys %$netif) {
2953                     my $d = $netif->{$netid};
2954                     my $bridge = $d->{bridge};
2955                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2956                     my $macaddr = $d->{mac};
2957                     my $iface = $d->{host_ifname};
2958                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2959                                                  $vmfw_conf, $vmid, 'IN');
2960                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2961                                                  $vmfw_conf, $vmid, 'OUT');
2962                 }
2963             }
2964         };
2965         warn $@ if $@; # just to be sure - should not happen
2966     }
2967
2968     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2969         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2970     }
2971
2972     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2973
2974     return ($ruleset, $ipset_ruleset);
2975 }
2976
2977 sub get_ruleset_status {
2978     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2979
2980     my $statushash = {};
2981
2982     foreach my $chain (sort keys %$ruleset) {
2983         my $sig = &$digest_fn($ruleset->{$chain});
2984
2985         $statushash->{$chain}->{sig} = $sig;
2986
2987         my $oldsig = $active_chains->{$chain};
2988         if (!defined($oldsig)) {
2989             $statushash->{$chain}->{action} = 'create';
2990         } else {
2991             if ($oldsig eq $sig) {
2992                 $statushash->{$chain}->{action} = 'exists';
2993             } else {
2994                 $statushash->{$chain}->{action} = 'update';
2995             }
2996         }
2997         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2998         foreach my $cmd (@{$ruleset->{$chain}}) {
2999             print "\t$cmd\n" if $verbose;
3000         }
3001     }
3002
3003     foreach my $chain (sort keys %$active_chains) {
3004         if (!defined($ruleset->{$chain})) {
3005             my $sig = $active_chains->{$chain};
3006             $statushash->{$chain}->{action} = 'delete';
3007             $statushash->{$chain}->{sig} = $sig;
3008             print "delete $chain ($sig)\n" if $verbose;
3009         }
3010     }
3011
3012     return $statushash;
3013 }
3014
3015 sub print_sig_rule {
3016     my ($chain, $sig) = @_;
3017
3018     # We just use this to store a SHA1 checksum used to detect changes
3019     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3020 }
3021
3022 sub get_ruleset_cmdlist {
3023     my ($ruleset, $verbose) = @_;
3024
3025     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3026
3027     my ($active_chains, $hooks) = iptables_get_chains();
3028     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3029
3030     # create missing chains first
3031     foreach my $chain (sort keys %$ruleset) {
3032         my $stat = $statushash->{$chain};
3033         die "internal error" if !$stat;
3034         next if $stat->{action} ne 'create';
3035
3036         $cmdlist .= ":$chain - [0:0]\n";
3037     }
3038
3039     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3040         my $chain = "PVEFW-$h";
3041         if ($ruleset->{$chain} && !$hooks->{$h}) {
3042             $cmdlist .= "-A $h -j $chain\n";
3043         }
3044     }
3045
3046     foreach my $chain (sort keys %$ruleset) {
3047         my $stat = $statushash->{$chain};
3048         die "internal error" if !$stat;
3049
3050         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3051             $cmdlist .= "-F $chain\n";
3052             foreach my $cmd (@{$ruleset->{$chain}}) {
3053                 $cmdlist .= "$cmd\n";
3054             }
3055             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3056         } elsif ($stat->{action} eq 'delete') {
3057             die "internal error"; # this should not happen
3058         } elsif ($stat->{action} eq 'exists') {
3059             # do nothing
3060         } else {
3061             die "internal error - unknown status '$stat->{action}'";
3062         }
3063     }
3064
3065     foreach my $chain (keys %$statushash) {
3066         next if $statushash->{$chain}->{action} ne 'delete';
3067         $cmdlist .= "-F $chain\n";
3068     }
3069     foreach my $chain (keys %$statushash) {
3070         next if $statushash->{$chain}->{action} ne 'delete';
3071         next if $chain eq 'PVEFW-INPUT';
3072         next if $chain eq 'PVEFW-OUTPUT';
3073         next if $chain eq 'PVEFW-FORWARD';
3074         $cmdlist .= "-X $chain\n";
3075     }
3076
3077     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3078
3079     $cmdlist .= "COMMIT\n";
3080
3081     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3082 }
3083
3084 sub get_ipset_cmdlist {
3085     my ($ruleset, $verbose) = @_;
3086
3087     my $cmdlist = "";
3088
3089     my $delete_cmdlist = "";
3090
3091     my $active_chains = ipset_get_chains();
3092     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3093
3094     # remove stale _swap chains
3095     foreach my $chain (keys %$active_chains) {
3096         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3097             $cmdlist .= "destroy $chain\n";
3098         }
3099     }
3100
3101     foreach my $chain (sort keys %$ruleset) {
3102         my $stat = $statushash->{$chain};
3103         die "internal error" if !$stat;
3104
3105         if ($stat->{action} eq 'create') {
3106             foreach my $cmd (@{$ruleset->{$chain}}) {
3107                 $cmdlist .= "$cmd\n";
3108             }
3109         }
3110
3111         if ($stat->{action} eq 'update') {
3112             my $chain_swap = $chain."_swap";
3113
3114             foreach my $cmd (@{$ruleset->{$chain}}) {
3115                 $cmd =~ s/$chain/$chain_swap/;
3116                 $cmdlist .= "$cmd\n";
3117             }
3118             $cmdlist .= "swap $chain_swap $chain\n";
3119             $cmdlist .= "flush $chain_swap\n";
3120             $cmdlist .= "destroy $chain_swap\n";
3121         }
3122
3123     }
3124
3125     foreach my $chain (keys %$statushash) {
3126         next if $statushash->{$chain}->{action} ne 'delete';
3127
3128         $delete_cmdlist .= "flush $chain\n";
3129         $delete_cmdlist .= "destroy $chain\n";
3130     }
3131
3132     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3133
3134     return ($cmdlist, $delete_cmdlist, $changes);
3135 }
3136
3137 sub apply_ruleset {
3138     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3139
3140     enable_bridge_firewall();
3141
3142     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3143         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3144
3145     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3146
3147     if ($verbose) {
3148         if ($ipset_changes) {
3149             print "ipset changes:\n";
3150             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3151             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3152         }
3153
3154         if ($changes) {
3155             print "iptables changes:\n";
3156             print $cmdlist;
3157         }
3158     }
3159
3160     ipset_restore_cmdlist($ipset_create_cmdlist);
3161
3162     iptables_restore_cmdlist($cmdlist);
3163
3164     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3165
3166     # test: re-read status and check if everything is up to date
3167     my $active_chains = iptables_get_chains();
3168     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3169
3170     my $errors;
3171     foreach my $chain (sort keys %$ruleset) {
3172         my $stat = $statushash->{$chain};
3173         if ($stat->{action} ne 'exists') {
3174             warn "unable to update chain '$chain'\n";
3175             $errors = 1;
3176         }
3177     }
3178
3179     die "unable to apply firewall changes\n" if $errors;
3180
3181     update_nf_conntrack_max($hostfw_conf);
3182
3183     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3184
3185 }
3186
3187 sub update_nf_conntrack_max {
3188     my ($hostfw_conf) = @_;
3189
3190     my $max = 65536; # reasonable default
3191
3192     my $options = $hostfw_conf->{options} || {};
3193
3194     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3195         $max = $options->{nf_conntrack_max};
3196         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3197     }
3198
3199     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3200     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3201
3202     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3203
3204     if ($current != $max) {
3205         my $hashsize = int($max/4);
3206         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3207         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3208     }
3209 }
3210
3211 sub update_nf_conntrack_tcp_timeout_established {
3212     my ($hostfw_conf) = @_;
3213
3214     my $options = $hostfw_conf->{options} || {};
3215
3216     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3217
3218     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3219 }
3220
3221 sub remove_pvefw_chains {
3222
3223     my ($chash, $hooks) = iptables_get_chains();
3224     my $cmdlist = "*filter\n";
3225
3226     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3227         if ($hooks->{$h}) {
3228             $cmdlist .= "-D $h -j PVEFW-$h\n";
3229         }
3230     }
3231
3232     foreach my $chain (keys %$chash) {
3233         $cmdlist .= "-F $chain\n";
3234     }
3235
3236     foreach my $chain (keys %$chash) {
3237         $cmdlist .= "-X $chain\n";
3238     }
3239     $cmdlist .= "COMMIT\n";
3240
3241     iptables_restore_cmdlist($cmdlist);
3242
3243     my $ipset_chains = ipset_get_chains();
3244
3245     $cmdlist = "";
3246
3247     foreach my $chain (keys %$ipset_chains) {
3248        $cmdlist .= "flush $chain\n";
3249        $cmdlist .= "destroy $chain\n";
3250     }
3251
3252     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3253 }
3254
3255 sub init {
3256     my $cluster_conf = load_clusterfw_conf();
3257     my $cluster_options = $cluster_conf->{options};
3258     my $enable = $cluster_options->{enable};
3259
3260     return if !$enable;
3261
3262     # load required modules here
3263 }
3264
3265 sub update {
3266     my $code = sub {
3267
3268         my $cluster_conf = load_clusterfw_conf();
3269         my $cluster_options = $cluster_conf->{options};
3270
3271         if (!$cluster_options->{enable}) {
3272             PVE::Firewall::remove_pvefw_chains();
3273             return;
3274         }
3275
3276         my $hostfw_conf = load_hostfw_conf();
3277
3278         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3279
3280         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3281     };
3282
3283     run_locked($code);
3284 }
3285
3286 1;