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-$id";
 778 }
 779
 780 sub parse_address_list {
 781     my ($str) = @_;
 782
 783     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 784         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 785         return;
 786     }
 787
 788     if ($str =~ m/^${ip_alias_pattern}$/) {
 789         die "alias name too long\n" if length($str) > $max_alias_name_length;
 790         return;
 791     }
 792
 793     my $count = 0;
 794     my $iprange = 0;
 795     foreach my $elem (split(/,/, $str)) {
 796         $count++;
 797         if (!Net::IP->new($elem)) {
 798             my $err = Net::IP::Error();
 799             die "invalid IP address: $err\n";
 800         }
 801         $iprange = 1 if $elem =~ m/-/;
 802     }
 803
 804     die "you can use a range in a list\n" if $iprange && $count > 1;
 805 }
 806
 807 sub parse_port_name_number_or_range {
 808     my ($str) = @_;
 809
 810     my $services = PVE::Firewall::get_etc_services();
 811     my $count = 0;
 812     my $icmp_port = 0;
 813
 814     foreach my $item (split(/,/, $str)) {
 815         $count++;
 816         if ($item =~ m/^(\d+):(\d+)$/) {
 817             my ($port1, $port2) = ($1, $2);
 818             die "invalid port '$port1'\n" if $port1 > 65535;
 819             die "invalid port '$port2'\n" if $port2 > 65535;
 820         } elsif ($item =~ m/^(\d+)$/) {
 821             my $port = $1;
 822             die "invalid port '$port'\n" if $port > 65535;
 823         } else {
 824             if ($icmp_type_names->{$item}) {
 825                 $icmp_port = 1;
 826             } else {
 827                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 828             }
 829         }
 830     }
 831
 832     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 833
 834     return $count;
 835 }
 836
 837 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 838 sub pve_fw_verify_port_spec {
 839    my ($portstr) = @_;
 840
 841    parse_port_name_number_or_range($portstr);
 842
 843    return $portstr;
 844 }
 845
 846 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 847 sub pve_fw_verify_v4addr_spec {
 848    my ($list) = @_;
 849
 850    parse_address_list($list);
 851
 852    return $list;
 853 }
 854
 855 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 856 sub pve_fw_verify_protocol_spec {
 857    my ($proto) = @_;
 858
 859    my $protocols = get_etc_protocols();
 860
 861    die "unknown protocol '$proto'\n" if $proto &&
 862        !(defined($protocols->{byname}->{$proto}) ||
 863          defined($protocols->{byid}->{$proto}));
 864
 865    return $proto;
 866 }
 867
 868
 869 # helper function for API
 870
 871 sub copy_opject_with_digest {
 872     my ($object) = @_;
 873
 874     my $sha = Digest::SHA->new('sha1');
 875
 876     my $res = {};
 877     foreach my $k (sort keys %$object) {
 878         my $v = $object->{$k};
 879         next if !defined($v);
 880         $res->{$k} = $v;
 881         $sha->add($k, ':', $v, "\n");
 882     }
 883
 884     my $digest = $sha->hexdigest;
 885
 886     $res->{digest} = $digest;
 887
 888     return wantarray ? ($res, $digest) : $res;
 889 }
 890
 891 sub copy_list_with_digest {
 892     my ($list) = @_;
 893
 894     my $sha = Digest::SHA->new('sha1');
 895
 896     my $res = [];
 897     foreach my $entry (@$list) {
 898         my $data = {};
 899         foreach my $k (sort keys %$entry) {
 900             my $v = $entry->{$k};
 901             next if !defined($v);
 902             $data->{$k} = $v;
 903             # Note: digest ignores refs ($rule->{errors})
 904             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 905         }
 906         push @$res, $data;
 907     }
 908
 909     my $digest = $sha->hexdigest;
 910
 911     foreach my $entry (@$res) {
 912         $entry->{digest} = $digest;
 913     }
 914
 915     return wantarray ? ($res, $digest) : $res;
 916 }
 917
 918 my $rule_properties = {
 919     pos => {
 920         description => "Update rule at position <pos>.",
 921         type => 'integer',
 922         minimum => 0,
 923         optional => 1,
 924     },
 925     digest => get_standard_option('pve-config-digest'),
 926     type => {
 927         type => 'string',
 928         optional => 1,
 929         enum => ['in', 'out', 'group'],
 930     },
 931     action => {
 932         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 933         type => 'string',
 934         optional => 1,
 935         pattern => $security_group_name_pattern,
 936         maxLength => 20,
 937         minLength => 2,
 938     },
 939     macro => {
 940         type => 'string',
 941         optional => 1,
 942         maxLength => 128,
 943     },
 944     iface => get_standard_option('pve-iface', { optional => 1 }),
 945     source => {
 946         type => 'string', format => 'pve-fw-v4addr-spec',
 947         optional => 1,
 948     },
 949     dest => {
 950         type => 'string', format => 'pve-fw-v4addr-spec',
 951         optional => 1,
 952     },
 953     proto => {
 954         type => 'string', format => 'pve-fw-protocol-spec',
 955         optional => 1,
 956     },
 957     enable => {
 958         type => 'boolean',
 959         optional => 1,
 960     },
 961     sport => {
 962         type => 'string', format => 'pve-fw-port-spec',
 963         optional => 1,
 964     },
 965     dport => {
 966         type => 'string', format => 'pve-fw-port-spec',
 967         optional => 1,
 968     },
 969     comment => {
 970         type => 'string',
 971         optional => 1,
 972     },
 973 };
 974
 975 sub add_rule_properties {
 976     my ($properties) = @_;
 977
 978     foreach my $k (keys %$rule_properties) {
 979         my $h = $rule_properties->{$k};
 980         # copy data, so that we can modify later without side effects
 981         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 982     }
 983
 984     return $properties;
 985 }
 986
 987 sub delete_rule_properties {
 988     my ($rule, $delete_str) = @_;
 989
 990     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 991         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 992             if !defined($rule_properties->{$opt});
 993         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 994             if $opt eq 'type' || $opt eq 'action';
 995         delete $rule->{$opt};
 996     }
 997
 998     return $rule;
 999 }
1000
1001 my $apply_macro = sub {
1002     my ($macro_name, $param, $verify) = @_;
1003
1004     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1005     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1006
1007     my $rules = [];
1008
1009     foreach my $templ (@$macro_rules) {
1010         my $rule = {};
1011         my $param_used = {};
1012         foreach my $k (keys %$templ) {
1013             my $v = $templ->{$k};
1014             if ($v eq 'PARAM') {
1015                 $v = $param->{$k};
1016                 $param_used->{$k} = 1;
1017             } elsif ($v eq 'DEST') {
1018                 $v = $param->{dest};
1019                 $param_used->{dest} = 1;
1020             } elsif ($v eq 'SOURCE') {
1021                 $v = $param->{source};
1022                 $param_used->{source} = 1;
1023             }
1024
1025             if (!defined($v)) {
1026                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1027                 raise_param_exc({ macro => $msg }) if $verify;
1028                 die "$msg\n";
1029             }
1030             $rule->{$k} = $v;
1031         }
1032         foreach my $k (keys %$param) {
1033             next if $k eq 'macro';
1034             next if !defined($param->{$k});
1035             next if $param_used->{$k};
1036             if (defined($rule->{$k})) {
1037                 if ($rule->{$k} ne $param->{$k}) {
1038                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1039                     raise_param_exc({ $k => $msg }) if $verify;
1040                     die "$msg\n";
1041                 }
1042             } else {
1043                 $rule->{$k} = $param->{$k};
1044             }
1045         }
1046         push @$rules, $rule;
1047     }
1048
1049     return $rules;
1050 };
1051
1052 my $rule_env_iface_lookup = {
1053     'ct' => 1,
1054     'vm' => 1,
1055     'group' => 0,
1056     'cluster' => 1,
1057     'host' => 1,
1058 };
1059
1060 sub verify_rule {
1061     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1062
1063     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1064
1065     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1066     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1067
1068     my $errors = $rule->{errors} || {};
1069
1070     my $error_count = 0;
1071
1072     my $add_error = sub {
1073         my ($param, $msg)  = @_;
1074         chomp $msg;
1075         raise_param_exc({ $param => $msg }) if !$noerr;
1076         $error_count++;
1077         $errors->{$param} = $msg if !$errors->{$param};
1078     };
1079
1080     my $check_ipset_or_alias_property = sub {
1081         my ($name) = @_;
1082
1083         if (my $value = $rule->{$name}) {
1084             if ($value =~ m/^\+/) {
1085                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1086                     &$add_error($name, "no such ipset '$1'")
1087                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1088
1089                 } else {
1090                     &$add_error($name, "invalid ipset name '$value'");
1091                 }
1092             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1093                 my $alias = lc($value);
1094                 &$add_error($name, "no such alias '$value'")
1095                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1096             }
1097         }
1098     };
1099
1100     my $type = $rule->{type};
1101     my $action = $rule->{action};
1102
1103     &$add_error('type', "missing property") if !$type;
1104     &$add_error('action', "missing property") if !$action;
1105
1106     if ($type) {
1107         if ($type eq  'in' || $type eq 'out') {
1108             &$add_error('action', "unknown action '$action'")
1109                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1110         } elsif ($type eq 'group') {
1111             &$add_error('type', "security groups not allowed")
1112                 if !$allow_groups;
1113             &$add_error('action', "invalid characters in security group name")
1114                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1115         } else {
1116             &$add_error('type', "unknown rule type '$type'");
1117         }
1118     }
1119
1120     if ($rule->{iface}) {
1121         &$add_error('type', "parameter -i not allowed for this rule type")
1122             if !$allow_iface;
1123         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1124         &$add_error('iface', $@) if $@;
1125         if ($rule_env eq 'vm') {
1126             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1127                 if $rule->{iface} !~  m/^net(\d+)$/;
1128         } elsif ($rule_env eq 'ct') {
1129             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1130                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1131         }
1132     }
1133
1134     if ($rule->{macro}) {
1135         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1136             $rule->{macro} = $preferred_name;
1137         } else {
1138             &$add_error('macro', "unknown macro '$rule->{macro}'");
1139         }
1140     }
1141
1142     if ($rule->{proto}) {
1143         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1144         &$add_error('proto', $@) if $@;
1145     }
1146
1147     if ($rule->{dport}) {
1148         eval { parse_port_name_number_or_range($rule->{dport}); };
1149         &$add_error('dport', $@) if $@;
1150         &$add_error('proto', "missing property - 'dport' requires this property")
1151             if !$rule->{proto};
1152     }
1153
1154     if ($rule->{sport}) {
1155         eval { parse_port_name_number_or_range($rule->{sport}); };
1156         &$add_error('sport', $@) if $@;
1157         &$add_error('proto', "missing property - 'sport' requires this property")
1158             if !$rule->{proto};
1159     }
1160
1161     if ($rule->{source}) {
1162         eval { parse_address_list($rule->{source}); };
1163         &$add_error('source', $@) if $@;
1164         &$check_ipset_or_alias_property('source');
1165     }
1166
1167     if ($rule->{dest}) {
1168         eval { parse_address_list($rule->{dest}); };
1169         &$add_error('dest', $@) if $@;
1170         &$check_ipset_or_alias_property('dest');
1171     }
1172
1173     if ($rule->{macro} && !$error_count) {
1174         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1175         if (my $err = $@) {
1176             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1177                 my $eh = $err->{errors};
1178                 foreach my $p (keys %$eh) {
1179                     &$add_error($p, $eh->{$p});
1180                 }
1181             } else {
1182                 &$add_error('macro', "$err");
1183             }
1184         }
1185     }
1186
1187     $rule->{errors} = $errors if $error_count;
1188
1189     return $rule;
1190 }
1191
1192 sub copy_rule_data {
1193     my ($rule, $param) = @_;
1194
1195     foreach my $k (keys %$rule_properties) {
1196         if (defined(my $v = $param->{$k})) {
1197             if ($v eq '' || $v eq '-') {
1198                 delete $rule->{$k};
1199             } else {
1200                 $rule->{$k} = $v;
1201             }
1202         }
1203     }
1204
1205     return $rule;
1206 }
1207
1208 # core functions
1209 my $bridge_firewall_enabled = 0;
1210
1211 sub enable_bridge_firewall {
1212
1213     return if $bridge_firewall_enabled; # only once
1214
1215     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1216     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1217
1218     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1219     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1220
1221     $bridge_firewall_enabled = 1;
1222 }
1223
1224 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1225
1226 sub iptables_restore_cmdlist {
1227     my ($cmdlist) = @_;
1228
1229     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1230 }
1231
1232 sub ipset_restore_cmdlist {
1233     my ($cmdlist) = @_;
1234
1235     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1236 }
1237
1238 sub iptables_get_chains {
1239
1240     my $res = {};
1241
1242     # check what chains we want to track
1243     my $is_pvefw_chain = sub {
1244         my $name = shift;
1245
1246         return 1 if $name =~ m/^PVEFW-\S+$/;
1247
1248         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1249
1250         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1251
1252         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1253
1254         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1255         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1256
1257         return undef;
1258     };
1259
1260     my $table = '';
1261
1262     my $hooks = {};
1263
1264     my $parser = sub {
1265         my $line = shift;
1266
1267         return if $line =~ m/^#/;
1268         return if $line =~ m/^\s*$/;
1269
1270         if ($line =~ m/^\*(\S+)$/) {
1271             $table = $1;
1272             return;
1273         }
1274
1275         return if $table ne 'filter';
1276
1277         if ($line =~ m/^:(\S+)\s/) {
1278             my $chain = $1;
1279             return if !&$is_pvefw_chain($chain);
1280             $res->{$chain} = "unknown";
1281         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1282             my ($chain, $sig) = ($1, $2);
1283             return if !&$is_pvefw_chain($chain);
1284             $res->{$chain} = $sig;
1285         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1286             $hooks->{$1} = 1;
1287         } else {
1288             # simply ignore the rest
1289             return;
1290         }
1291     };
1292
1293     run_command("/sbin/iptables-save", outfunc => $parser);
1294
1295     return wantarray ? ($res, $hooks) : $res;
1296 }
1297
1298 sub iptables_chain_digest {
1299     my ($rules) = @_;
1300     my $digest = Digest::SHA->new('sha1');
1301     foreach my $rule (@$rules) { # order is important
1302         $digest->add($rule);
1303     }
1304     return $digest->b64digest;
1305 }
1306
1307 sub ipset_chain_digest {
1308     my ($rules) = @_;
1309
1310     my $digest = Digest::SHA->new('sha1');
1311     foreach my $rule (sort @$rules) { # note: sorted
1312         $digest->add($rule);
1313     }
1314     return $digest->b64digest;
1315 }
1316
1317 sub ipset_get_chains {
1318
1319     my $res = {};
1320     my $chains = {};
1321
1322     my $parser = sub {
1323         my $line = shift;
1324
1325         return if $line =~ m/^#/;
1326         return if $line =~ m/^\s*$/;
1327         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1328             my $chain = $1;
1329             $line =~ s/\s+$//; # delete trailing white space
1330             push @{$chains->{$chain}}, $line;
1331         } else {
1332             # simply ignore the rest
1333             return;
1334         }
1335     };
1336
1337     run_command("/usr/sbin/ipset save", outfunc => $parser);
1338
1339     # compute digest for each chain
1340     foreach my $chain (keys %$chains) {
1341         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1342     }
1343
1344     return $res;
1345 }
1346
1347 sub ruleset_generate_cmdstr {
1348     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1349
1350     return if defined($rule->{enable}) && !$rule->{enable};
1351     return if $rule->{errors};
1352
1353     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1354
1355     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1356     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1357
1358     my @cmd = ();
1359
1360     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1361     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1362
1363     my $source = $rule->{source};
1364     my $dest = $rule->{dest};
1365
1366     if ($source) {
1367         if ($source =~ m/^\+/) {
1368             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1369                 my $name = $1;
1370                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1371                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1372                     push @cmd, "-m set --match-set ${ipset_chain} src";
1373                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1374                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1375                     push @cmd, "-m set --match-set ${ipset_chain} src";
1376                 } else {
1377                     die "no such ipset '$name'\n";
1378                 }
1379             } else {
1380                 die "invalid security group name '$source'\n";
1381             }
1382         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1383             my $alias = lc($source);
1384             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1385             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1386             die "no such alias '$source'\n" if !$e;
1387             push @cmd, "-s $e->{cidr}";
1388         } elsif ($source =~ m/\-/){
1389             push @cmd, "-m iprange --src-range $source";
1390         } else {
1391             push @cmd, "-s $source";
1392         }
1393     }
1394
1395     if ($dest) {
1396         if ($dest =~ m/^\+/) {
1397             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1398                 my $name = $1;
1399                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1400                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1401                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1402                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1403                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1404                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1405                 } else {
1406                     die "no such ipset '$name'\n";
1407                 }
1408             } else {
1409                 die "invalid security group name '$dest'\n";
1410             }
1411         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1412             my $alias = lc($dest);
1413             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1414             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1415             die "no such alias '$dest'\n" if !$e;
1416             push @cmd, "-d $e->{cidr}";
1417         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1418             push @cmd, "-m iprange --dst-range $dest";
1419         } else {
1420             push @cmd, "-d $dest";
1421         }
1422     }
1423
1424     if ($rule->{proto}) {
1425         push @cmd, "-p $rule->{proto}";
1426
1427         my $multiport = 0;
1428         $multiport++ if $nbdport > 1;
1429         $multiport++ if $nbsport > 1;
1430
1431         push @cmd, "--match multiport" if $multiport;
1432
1433         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1434             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1435
1436         if ($rule->{dport}) {
1437             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1438                 # Note: we use dport to store --icmp-type
1439                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1440                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1441             } else {
1442                 if ($nbdport > 1) {
1443                     if ($multiport == 2) {
1444                         push @cmd,  "--ports $rule->{dport}";
1445                     } else {
1446                         push @cmd, "--dports $rule->{dport}";
1447                     }
1448                 } else {
1449                     push @cmd, "--dport $rule->{dport}";
1450                 }
1451             }
1452         }
1453
1454         if ($rule->{sport}) {
1455             if ($nbsport > 1) {
1456                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1457             } else {
1458                 push @cmd, "--sport $rule->{sport}";
1459             }
1460         }
1461     } elsif ($rule->{dport} || $rule->{sport}) {
1462         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1463         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1464     }
1465
1466     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1467
1468     if (my $action = $rule->{action}) {
1469         $action = $actions->{$action} if defined($actions->{$action});
1470         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1471         push @cmd, $goto ? "-g $action" : "-j $action";
1472     }
1473
1474     return scalar(@cmd) ? join(' ', @cmd) : undef;
1475 }
1476
1477 sub ruleset_generate_rule {
1478     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1479
1480     my $rules;
1481
1482     if ($rule->{macro}) {
1483         $rules = &$apply_macro($rule->{macro}, $rule);
1484     } else {
1485         $rules = [ $rule ];
1486     }
1487
1488     # update all or nothing
1489
1490     my @cmds = ();
1491     foreach my $tmp (@$rules) {
1492         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1493             push @cmds, $cmdstr;
1494         }
1495     }
1496
1497     foreach my $cmdstr (@cmds) {
1498         ruleset_addrule($ruleset, $chain, $cmdstr);
1499     }
1500 }
1501
1502 sub ruleset_generate_rule_insert {
1503     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1504
1505     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1506
1507     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1508         ruleset_insertrule($ruleset, $chain, $cmdstr);
1509     }
1510 }
1511
1512 sub ruleset_create_chain {
1513     my ($ruleset, $chain) = @_;
1514
1515     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1516     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1517
1518     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1519
1520     $ruleset->{$chain} = [];
1521 }
1522
1523 sub ruleset_chain_exist {
1524     my ($ruleset, $chain) = @_;
1525
1526     return $ruleset->{$chain} ? 1 : undef;
1527 }
1528
1529 sub ruleset_addrule {
1530    my ($ruleset, $chain, $rule) = @_;
1531
1532    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1533
1534    push @{$ruleset->{$chain}}, "-A $chain $rule";
1535 }
1536
1537 sub ruleset_insertrule {
1538    my ($ruleset, $chain, $rule) = @_;
1539
1540    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1541
1542    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1543 }
1544
1545 sub get_log_rule_base {
1546     my ($chain, $vmid, $msg, $loglevel) = @_;
1547
1548     die "internal error - no log level" if !defined($loglevel);
1549
1550     $vmid = 0 if !defined($vmid);
1551
1552     # Note: we use special format for prefix to pass further
1553     # info to log daemon (VMID, LOGVELEL and CHAIN)
1554
1555     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1556 }
1557
1558 sub ruleset_addlog {
1559     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1560
1561     return if !defined($loglevel);
1562
1563     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1564
1565     $logrule = "$rule $logrule" if defined($rule);
1566
1567     ruleset_addrule($ruleset, $chain, $logrule);
1568 }
1569
1570 sub ruleset_add_chain_policy {
1571     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1572
1573     if ($policy eq 'ACCEPT') {
1574
1575         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1576                               { ACCEPT =>  $accept_action});
1577
1578     } elsif ($policy eq 'DROP') {
1579
1580         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1581
1582         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1583
1584         ruleset_addrule($ruleset, $chain, "-j DROP");
1585     } elsif ($policy eq 'REJECT') {
1586         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1587
1588         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1589
1590         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1591     } else {
1592         # should not happen
1593         die "internal error: unknown policy '$policy'";
1594     }
1595 }
1596
1597 sub ruleset_chain_add_conn_filters {
1598     my ($ruleset, $chain, $accept) = @_;
1599
1600     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1601     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1602 }
1603
1604 sub ruleset_chain_add_input_filters {
1605     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1606
1607     if ($cluster_conf->{ipset}->{blacklist}){
1608         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1609             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1610             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1611             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1612         }
1613         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1614         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1615     }
1616
1617     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1618         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1619     }
1620
1621     if ($options->{tcpflags}) {
1622         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1623     }
1624 }
1625
1626 sub ruleset_create_vm_chain {
1627     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1628
1629     ruleset_create_chain($ruleset, $chain);
1630     my $accept = generate_nfqueue($options);
1631
1632     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1633         if ($direction eq 'OUT') {
1634             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1635                                                       proto => 'udp', sport => 68, dport => 67 });
1636         } else {
1637             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1638                                                       proto => 'udp', sport => 67, dport => 68 });
1639         }
1640     }
1641
1642     if ($direction eq 'OUT') {
1643         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1644             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1645         }
1646         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1647     }
1648 }
1649
1650 sub ruleset_add_group_rule {
1651     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1652
1653     my $group = $rule->{action};
1654     my $group_chain = "GROUP-$group-$direction";
1655     if(!ruleset_chain_exist($ruleset, $group_chain)){
1656         generate_group_rules($ruleset, $cluster_conf, $group);
1657     }
1658
1659     if ($direction eq 'OUT' && $rule->{iface_out}) {
1660         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1661     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1662         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1663     } else {
1664         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1665     }
1666
1667     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1668 }
1669
1670 sub ruleset_generate_vm_rules {
1671     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1672
1673     my $lc_direction = lc($direction);
1674
1675     my $in_accept = generate_nfqueue($options);
1676
1677     foreach my $rule (@$rules) {
1678         next if $rule->{iface} && $rule->{iface} ne $netid;
1679         next if !$rule->{enable} || $rule->{errors};
1680         if ($rule->{type} eq 'group') {
1681             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1682                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1683         } else {
1684             next if $rule->{type} ne $lc_direction;
1685             eval {
1686                 if ($direction eq 'OUT') {
1687                     ruleset_generate_rule($ruleset, $chain, $rule,
1688                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1689                                           undef, $cluster_conf, $vmfw_conf);
1690                 } else {
1691                     ruleset_generate_rule($ruleset, $chain, $rule,
1692                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1693                                           undef, $cluster_conf, $vmfw_conf);
1694                 }
1695             };
1696             warn $@ if $@;
1697         }
1698     }
1699 }
1700
1701 sub generate_nfqueue {
1702     my ($options) = @_;
1703
1704     if ($options->{ips}) {
1705         my $action = "NFQUEUE";
1706         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1707             if (defined($3) && defined($1)) {
1708                 $action .= " --queue-balance $1:$3";
1709             } elsif (defined($1)) {
1710                 $action .= " --queue-num $1";
1711             }
1712         }
1713         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1714         return $action;
1715     } else {
1716         return "ACCEPT";
1717     }
1718 }
1719
1720 sub ruleset_generate_vm_ipsrules {
1721     my ($ruleset, $options, $direction, $iface) = @_;
1722
1723     if ($options->{ips} && $direction eq 'IN') {
1724         my $nfqueue = generate_nfqueue($options);
1725
1726         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1727             ruleset_create_chain($ruleset, "PVEFW-IPS");
1728         }
1729
1730         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1731     }
1732 }
1733
1734 sub generate_venet_rules_direction {
1735     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1736
1737     my $lc_direction = lc($direction);
1738
1739     my $rules = $vmfw_conf->{rules};
1740
1741     my $options = $vmfw_conf->{options};
1742     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1743
1744     my $chain = "venet0-$vmid-$direction";
1745
1746     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1747
1748     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1749
1750     # implement policy
1751     my $policy;
1752
1753     if ($direction eq 'OUT') {
1754         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1755     } else {
1756         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1757     }
1758
1759     my $accept = generate_nfqueue($options);
1760     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1761     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1762
1763     if ($direction eq 'OUT') {
1764         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1765             action => $chain,
1766             source => $ip,
1767             iface_in => 'venet0'});
1768     } else {
1769         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1770             action => $chain,
1771             dest => $ip,
1772             iface_out => 'venet0'});
1773     }
1774 }
1775
1776 sub generate_tap_rules_direction {
1777     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1778
1779     my $lc_direction = lc($direction);
1780
1781     my $rules = $vmfw_conf->{rules};
1782
1783     my $options = $vmfw_conf->{options};
1784     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1785
1786     my $tapchain = "$iface-$direction";
1787
1788     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1789
1790     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1791
1792     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1793
1794     # implement policy
1795     my $policy;
1796
1797     if ($direction eq 'OUT') {
1798         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1799     } else {
1800         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1801     }
1802
1803     my $accept = generate_nfqueue($options);
1804     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1805     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1806
1807     # plug the tap chain to bridge chain
1808     if ($direction eq 'IN') {
1809         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1810                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1811     } else {
1812         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1813                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1814     }
1815 }
1816
1817 sub enable_host_firewall {
1818     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1819
1820     my $options = $hostfw_conf->{options};
1821     my $cluster_options = $cluster_conf->{options};
1822     my $rules = $hostfw_conf->{rules};
1823     my $cluster_rules = $cluster_conf->{rules};
1824
1825     # host inbound firewall
1826     my $chain = "PVEFW-HOST-IN";
1827     ruleset_create_chain($ruleset, $chain);
1828
1829     my $loglevel = get_option_log_level($options, "log_level_in");
1830
1831     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1832
1833     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1834     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1835
1836     # we use RETURN because we need to check also tap rules
1837     my $accept_action = 'RETURN';
1838
1839     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1840
1841     # add host rules first, so that cluster wide rules can be overwritten
1842     foreach my $rule (@$rules, @$cluster_rules) {
1843         next if !$rule->{enable} || $rule->{errors};
1844
1845         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1846
1847         eval {
1848             if ($rule->{type} eq 'group') {
1849                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1850             } elsif ($rule->{type} eq 'in') {
1851                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1852                                       undef, $cluster_conf, $hostfw_conf);
1853             }
1854         };
1855         warn $@ if $@;
1856         delete $rule->{iface_in};
1857     }
1858
1859     # allow standard traffic for management ipset (includes cluster network)
1860     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1861     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1862     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1863     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1864     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1865     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1866
1867     my $localnet = local_network();
1868
1869     # corosync
1870     if ($localnet) {
1871         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1872         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1873         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1874     }
1875
1876     # implement input policy
1877     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1878     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1879
1880     # host outbound firewall
1881     $chain = "PVEFW-HOST-OUT";
1882     ruleset_create_chain($ruleset, $chain);
1883
1884     $loglevel = get_option_log_level($options, "log_level_out");
1885
1886     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1887
1888     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1889
1890     # we use RETURN because we may want to check other thigs later
1891     $accept_action = 'RETURN';
1892
1893     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1894
1895     # add host rules first, so that cluster wide rules can be overwritten
1896     foreach my $rule (@$rules, @$cluster_rules) {
1897         next if !$rule->{enable} || $rule->{errors};
1898
1899         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1900         eval {
1901             if ($rule->{type} eq 'group') {
1902                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1903             } elsif ($rule->{type} eq 'out') {
1904                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1905                                       undef, $cluster_conf, $hostfw_conf);
1906             }
1907         };
1908         warn $@ if $@;
1909         delete $rule->{iface_out};
1910     }
1911
1912     # allow standard traffic on cluster network
1913     if ($localnet) {
1914         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1915         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1916         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1917         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1918
1919         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1920         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1921         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1922     }
1923
1924     # implement output policy
1925     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1926     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1927
1928     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1929     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1930 }
1931
1932 sub generate_group_rules {
1933     my ($ruleset, $cluster_conf, $group) = @_;
1934
1935     my $rules = $cluster_conf->{groups}->{$group};
1936
1937     if (!$rules) {
1938         warn "no such security group '$group'\n";
1939         $rules = []; # create empty chain
1940     }
1941
1942     my $chain = "GROUP-${group}-IN";
1943
1944     ruleset_create_chain($ruleset, $chain);
1945     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1946
1947     foreach my $rule (@$rules) {
1948         next if $rule->{type} ne 'in';
1949         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1950     }
1951
1952     $chain = "GROUP-${group}-OUT";
1953
1954     ruleset_create_chain($ruleset, $chain);
1955     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1956
1957     foreach my $rule (@$rules) {
1958         next if $rule->{type} ne 'out';
1959         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1960         # check also other tap rules later
1961         ruleset_generate_rule($ruleset, $chain, $rule,
1962                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1963     }
1964 }
1965
1966 my $MAX_NETS = 32;
1967 my $valid_netdev_names = {};
1968 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1969     $valid_netdev_names->{"net$i"} = 1;
1970 }
1971
1972 sub parse_fw_rule {
1973     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
1974
1975     my $orig_line = $line;
1976
1977     my $rule = {};
1978
1979     # we can add single line comments to the end of the rule
1980     if ($line =~ s/#\s*(.*?)\s*$//) {
1981         $rule->{comment} = decode('utf8', $1);
1982     }
1983
1984     # we can disable a rule when prefixed with '|'
1985
1986     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1987
1988     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1989         die "unable to parse rule: $line\n";
1990
1991     $rule->{type} = lc($1);
1992     $rule->{action} = $2;
1993
1994     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1995         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1996             $rule->{macro} = $1;
1997             $rule->{action} = $2;
1998         }
1999     }
2000
2001     while (length($line)) {
2002         if ($line =~ s/^-i (\S+)\s*//) {
2003             $rule->{iface} = $1;
2004             next;
2005         }
2006
2007         last if $rule->{type} eq 'group';
2008
2009         if ($line =~ s/^-p (\S+)\s*//) {
2010             $rule->{proto} = $1;
2011             next;
2012         }
2013
2014         if ($line =~ s/^-dport (\S+)\s*//) {
2015             $rule->{dport} = $1;
2016             next;
2017         }
2018
2019         if ($line =~ s/^-sport (\S+)\s*//) {
2020             $rule->{sport} = $1;
2021             next;
2022         }
2023         if ($line =~ s/^-source (\S+)\s*//) {
2024             $rule->{source} = $1;
2025             next;
2026         }
2027         if ($line =~ s/^-dest (\S+)\s*//) {
2028             $rule->{dest} = $1;
2029             next;
2030         }
2031
2032         last;
2033     }
2034
2035     die "unable to parse rule parameters: $line\n" if length($line);
2036
2037     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2038     if ($verbose && $rule->{errors}) {
2039         warn "$prefix - errors in rule parameters: $orig_line\n";
2040         foreach my $p (keys %{$rule->{errors}}) {
2041             warn "  $p: $rule->{errors}->{$p}\n";
2042         }
2043     }
2044
2045     return $rule;
2046 }
2047
2048 sub parse_vmfw_option {
2049     my ($line) = @_;
2050
2051     my ($opt, $value);
2052
2053     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2054
2055     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2056         $opt = lc($1);
2057         $value = int($2);
2058     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2059         $opt = lc($1);
2060         $value = $2 ? lc($3) : '';
2061     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2062         $opt = lc($1);
2063         $value = uc($3);
2064     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2065         $opt = lc($1);
2066         $value = $2;
2067     } else {
2068         die "can't parse option '$line'\n"
2069     }
2070
2071     return ($opt, $value);
2072 }
2073
2074 sub parse_hostfw_option {
2075     my ($line) = @_;
2076
2077     my ($opt, $value);
2078
2079     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2080
2081     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2082         $opt = lc($1);
2083         $value = int($2);
2084     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2085         $opt = lc($1);
2086         $value = $2 ? lc($3) : '';
2087     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2088         $opt = lc($1);
2089         $value = int($2);
2090     } else {
2091         die "can't parse option '$line'\n"
2092     }
2093
2094     return ($opt, $value);
2095 }
2096
2097 sub parse_clusterfw_option {
2098     my ($line) = @_;
2099
2100     my ($opt, $value);
2101
2102     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2103         $opt = lc($1);
2104         $value = int($2);
2105     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2106         $opt = lc($1);
2107         $value = uc($3);
2108     } else {
2109         die "can't parse option '$line'\n"
2110     }
2111
2112     return ($opt, $value);
2113 }
2114
2115 sub resolve_alias {
2116     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2117
2118     if ($cidr !~ m/^\d/) {
2119         my $alias = lc($cidr);
2120         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2121         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2122         return $e->{cidr} if $e;
2123
2124         die "no such alias '$cidr'\n";
2125     }
2126
2127     return $cidr;
2128 }
2129
2130 sub parse_alias {
2131     my ($line) = @_;
2132
2133     # we can add single line comments to the end of the line
2134     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2135
2136     if ($line =~ m/^(\S+)\s(\S+)$/) {
2137         my ($name, $cidr) = ($1, $2);
2138         $cidr =~ s|/32$||;
2139         pve_verify_ipv4_or_cidr($cidr);
2140         my $data = {
2141             name => $name,
2142             cidr => $cidr,
2143         };
2144         $data->{comment} = $comment  if $comment;
2145         return $data;
2146     }
2147
2148     return undef;
2149 }
2150
2151 sub generic_fw_config_parser {
2152     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2153
2154     my $section;
2155     my $group;
2156
2157     my $res = $empty_conf;
2158
2159     while (defined(my $line = <$fh>)) {
2160         next if $line =~ m/^#/;
2161         next if $line =~ m/^\s*$/;
2162
2163         chomp $line;
2164
2165         my $linenr = $fh->input_line_number();
2166         my $prefix = "$filename (line $linenr)";
2167
2168         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2169             $section = 'options';
2170             next;
2171         }
2172
2173         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2174             $section = 'aliases';
2175             next;
2176         }
2177
2178         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2179             $section = 'groups';
2180             $group = lc($1);
2181             my $comment = $2;
2182             eval {
2183                 die "security group name too long\n" if length($group) > $max_group_name_length;
2184                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2185             };
2186             if (my $err = $@) {
2187                 ($section, $group, $comment) = undef;
2188                 warn "$prefix: $err";
2189                 next;
2190             }
2191
2192             $res->{$section}->{$group} = [];
2193             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2194                 if $comment;
2195             next;
2196         }
2197
2198         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2199             $section = 'rules';
2200             next;
2201         }
2202
2203         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2204             $section = 'ipset';
2205             $group = lc($1);
2206             my $comment = $2;
2207             eval {
2208                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2209                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2210             };
2211             if (my $err = $@) {
2212                 ($section, $group, $comment) = undef;
2213                 warn "$prefix: $err";
2214                 next;
2215             }
2216
2217             $res->{$section}->{$group} = [];
2218             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2219                 if $comment;
2220             next;
2221         }
2222
2223         if (!$section) {
2224             warn "$prefix: skip line - no section\n";
2225             next;
2226         }
2227
2228         if ($section eq 'options') {
2229             eval {
2230                 my ($opt, $value);
2231                 if ($rule_env eq 'cluster') {
2232                     ($opt, $value) = parse_clusterfw_option($line);
2233                 } elsif ($rule_env eq 'host') {
2234                     ($opt, $value) = parse_hostfw_option($line);
2235                 } else {
2236                     ($opt, $value) = parse_vmfw_option($line);
2237                 }
2238                 $res->{options}->{$opt} = $value;
2239             };
2240             warn "$prefix: $@" if $@;
2241         } elsif ($section eq 'aliases') {
2242             eval {
2243                 my $data = parse_alias($line);
2244                 $res->{aliases}->{lc($data->{name})} = $data;
2245             };
2246             warn "$prefix: $@" if $@;
2247         } elsif ($section eq 'rules') {
2248             my $rule;
2249             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2250             if (my $err = $@) {
2251                 warn "$prefix: $err";
2252                 next;
2253             }
2254             push @{$res->{$section}}, $rule;
2255         } elsif ($section eq 'groups') {
2256             my $rule;
2257             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2258             if (my $err = $@) {
2259                 warn "$prefix: $err";
2260                 next;
2261             }
2262             push @{$res->{$section}->{$group}}, $rule;
2263         } elsif ($section eq 'ipset') {
2264             # we can add single line comments to the end of the rule
2265             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2266
2267             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2268             my $nomatch = $1;
2269             my $cidr = $2;
2270             my $errors;
2271
2272             if ($nomatch && !$feature_ipset_nomatch) {
2273                 $errors->{nomatch} = "nomatch not supported by kernel";
2274             }
2275
2276             eval {
2277                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2278                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2279                 } else {
2280                     $cidr =~ s|/32$||;
2281                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2282                 }
2283             };
2284             if (my $err = $@) {
2285                 chomp $err;
2286                 $errors->{cidr} = $err;
2287             }
2288
2289             my $entry = { cidr => $cidr };
2290             $entry->{nomatch} = 1 if $nomatch;
2291             $entry->{comment} = $comment if $comment;
2292             $entry->{errors} =  $errors if $errors;
2293
2294             if ($verbose && $errors) {
2295                 warn "$prefix - errors in ipset '$group': $line\n";
2296                 foreach my $p (keys %{$errors}) {
2297                     warn "  $p: $errors->{$p}\n";
2298                 }
2299             }
2300
2301             push @{$res->{$section}->{$group}}, $entry;
2302         } else {
2303             warn "$prefix: skip line - unknown section\n";
2304             next;
2305         }
2306     }
2307
2308     return $res;
2309 }
2310
2311 sub parse_hostfw_config {
2312     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2313
2314     my $empty_conf = { rules => [], options => {}};
2315
2316     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2317 }
2318
2319 sub parse_vmfw_config {
2320     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2321
2322     my $empty_conf = {
2323         rules => [],
2324         options => {},
2325         aliases => {},
2326         ipset => {} ,
2327         ipset_comments => {},
2328     };
2329
2330     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2331 }
2332
2333 sub parse_clusterfw_config {
2334     my ($filename, $fh, $verbose) = @_;
2335
2336     my $section;
2337     my $group;
2338
2339     my $empty_conf = {
2340         rules => [],
2341         options => {},
2342         aliases => {},
2343         groups => {},
2344         group_comments => {},
2345         ipset => {} ,
2346         ipset_comments => {},
2347     };
2348
2349     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2350 }
2351
2352 sub run_locked {
2353     my ($code, @param) = @_;
2354
2355     my $timeout = 10;
2356
2357     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2358
2359     die $@ if $@;
2360
2361     return $res;
2362 }
2363
2364 sub read_local_vm_config {
2365
2366     my $openvz = {};
2367     my $qemu = {};
2368
2369     my $vmdata = { openvz => $openvz, qemu => $qemu };
2370
2371     my $vmlist = PVE::Cluster::get_vmlist();
2372     return $vmdata if !$vmlist || !$vmlist->{ids};
2373     my $ids = $vmlist->{ids};
2374
2375     foreach my $vmid (keys %$ids) {
2376         next if !$vmid; # skip VE0
2377         my $d = $ids->{$vmid};
2378         next if !$d->{node} || $d->{node} ne $nodename;
2379         next if !$d->{type};
2380         if ($d->{type} eq 'openvz') {
2381             if ($have_pve_manager) {
2382                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2383                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2384                     $openvz->{$vmid} = $conf;
2385                 }
2386             }
2387         } elsif ($d->{type} eq 'qemu') {
2388             if ($have_qemu_server) {
2389                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2390                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2391                     $qemu->{$vmid} = $conf;
2392                 }
2393             }
2394         }
2395     }
2396
2397     return $vmdata;
2398 };
2399
2400 sub load_vmfw_conf {
2401     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2402
2403     my $vmfw_conf = {};
2404
2405     $dir = $pvefw_conf_dir if !defined($dir);
2406
2407     my $filename = "$dir/$vmid.fw";
2408     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2409         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2410         $vmfw_conf->{vmid} = $vmid;
2411     }
2412
2413     return $vmfw_conf;
2414 }
2415
2416 my $format_rules = sub {
2417     my ($rules, $allow_iface) = @_;
2418
2419     my $raw = '';
2420
2421     foreach my $rule (@$rules) {
2422         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2423             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2424             $raw .= uc($rule->{type});
2425             if ($rule->{macro}) {
2426                 $raw .= " $rule->{macro}($rule->{action})";
2427             } else {
2428                 $raw .= " " . $rule->{action};
2429             }
2430             if ($allow_iface && $rule->{iface}) {
2431                 $raw .= " -i $rule->{iface}";
2432             }
2433
2434             if ($rule->{type} ne  'group')  {
2435                 $raw .= " -source $rule->{source}" if $rule->{source};
2436                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2437                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2438                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2439                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2440             }
2441
2442             $raw .= " # " . encode('utf8', $rule->{comment})
2443                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2444             $raw .= "\n";
2445         } else {
2446             die "unknown rule type '$rule->{type}'";
2447         }
2448     }
2449
2450     return $raw;
2451 };
2452
2453 my $format_options = sub {
2454     my ($options) = @_;
2455
2456     my $raw = '';
2457
2458     $raw .= "[OPTIONS]\n\n";
2459     foreach my $opt (keys %$options) {
2460         $raw .= "$opt: $options->{$opt}\n";
2461     }
2462     $raw .= "\n";
2463
2464     return $raw;
2465 };
2466
2467 my $format_aliases = sub {
2468     my ($aliases) = @_;
2469
2470     my $raw = '';
2471
2472     $raw .= "[ALIASES]\n\n";
2473     foreach my $k (keys %$aliases) {
2474         my $e = $aliases->{$k};
2475         $raw .= "$e->{name} $e->{cidr}";
2476         $raw .= " # " . encode('utf8', $e->{comment})
2477             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2478         $raw .= "\n";
2479     }
2480     $raw .= "\n";
2481
2482     return $raw;
2483 };
2484
2485 my $format_ipsets = sub {
2486     my ($fw_conf) = @_;
2487
2488     my $raw = '';
2489
2490     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2491         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2492             my $utf8comment = encode('utf8', $comment);
2493             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2494         } else {
2495             $raw .= "[IPSET $ipset]\n\n";
2496         }
2497         my $options = $fw_conf->{ipset}->{$ipset};
2498
2499         my $nethash = {};
2500         foreach my $entry (@$options) {
2501             $nethash->{$entry->{cidr}} = $entry;
2502         }
2503
2504         foreach my $cidr (sort keys %$nethash) {
2505             my $entry = $nethash->{$cidr};
2506             my $line = $entry->{nomatch} ? '!' : '';
2507             $line .= $entry->{cidr};
2508             $line .= " # " . encode('utf8', $entry->{comment})
2509                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2510             $raw .= "$line\n";
2511         }
2512
2513         $raw .= "\n";
2514     }
2515
2516     return $raw;
2517 };
2518
2519 sub save_vmfw_conf {
2520     my ($vmid, $vmfw_conf) = @_;
2521
2522     my $raw = '';
2523
2524     my $options = $vmfw_conf->{options};
2525     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2526
2527     my $aliases = $vmfw_conf->{aliases};
2528     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2529
2530     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2531
2532     my $rules = $vmfw_conf->{rules} || [];
2533     if ($rules && scalar(@$rules)) {
2534         $raw .= "[RULES]\n\n";
2535         $raw .= &$format_rules($rules, 1);
2536         $raw .= "\n";
2537     }
2538
2539     mkdir $pvefw_conf_dir;
2540
2541     my $filename = "$pvefw_conf_dir/$vmid.fw";
2542     PVE::Tools::file_set_contents($filename, $raw);
2543 }
2544
2545 sub read_vm_firewall_configs {
2546     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2547
2548     my $vmfw_configs = {};
2549
2550     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2551         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2552         next if !$vmfw_conf->{options}; # skip if file does not exists
2553         $vmfw_configs->{$vmid} = $vmfw_conf;
2554     }
2555     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2556         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2557         next if !$vmfw_conf->{options}; # skip if file does not exists
2558         $vmfw_configs->{$vmid} = $vmfw_conf;
2559     }
2560
2561     return $vmfw_configs;
2562 }
2563
2564 sub get_option_log_level {
2565     my ($options, $k) = @_;
2566
2567     my $v = $options->{$k};
2568     $v = $default_log_level if !defined($v);
2569
2570     return undef if $v eq '' || $v eq 'nolog';
2571
2572     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2573
2574     return $v if ($v >= 0) && ($v <= 7);
2575
2576     warn "unknown log level ($k = '$v')\n";
2577
2578     return undef;
2579 }
2580
2581 sub generate_std_chains {
2582     my ($ruleset, $options) = @_;
2583
2584     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2585
2586     # same as shorewall smurflog.
2587     my $chain = 'PVEFW-smurflog';
2588     $pve_std_chains->{$chain} = [];
2589
2590     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2591     push @{$pve_std_chains->{$chain}}, "-j DROP";
2592
2593     # same as shorewall logflags action.
2594     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2595     $chain = 'PVEFW-logflags';
2596     $pve_std_chains->{$chain} = [];
2597
2598     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2599     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2600     push @{$pve_std_chains->{$chain}}, "-j DROP";
2601
2602     foreach my $chain (keys %$pve_std_chains) {
2603         ruleset_create_chain($ruleset, $chain);
2604         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2605             if (ref($rule)) {
2606                 ruleset_generate_rule($ruleset, $chain, $rule);
2607             } else {
2608                 ruleset_addrule($ruleset, $chain, $rule);
2609             }
2610         }
2611     }
2612 }
2613
2614 sub generate_ipset_chains {
2615     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2616
2617     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2618         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2619         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2620     }
2621 }
2622
2623 sub generate_ipset {
2624     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2625
2626     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2627
2628     my $hashsize = scalar(@$options);
2629     if ($hashsize <= 64) {
2630         $hashsize = 64;
2631     } else {
2632         $hashsize = round_powerof2($hashsize);
2633     }
2634
2635     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2636
2637     # remove duplicates
2638     my $nethash = {};
2639     foreach my $entry (@$options) {
2640         next if $entry->{errors}; # skip entries with errors
2641         eval {
2642             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2643             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2644         };
2645         warn $@ if $@;
2646     }
2647
2648     foreach my $cidr (sort keys %$nethash) {
2649         my $entry = $nethash->{$cidr};
2650
2651         my $cmd = "add $name $cidr";
2652         if ($entry->{nomatch}) {
2653             if ($feature_ipset_nomatch) {
2654                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2655             } else {
2656                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2657             }
2658         } else {
2659             push @{$ipset_ruleset->{$name}}, $cmd;
2660         }
2661     }
2662 }
2663
2664 sub round_powerof2 {
2665     my ($int) = @_;
2666
2667     $int--;
2668     $int |= $int >> $_ foreach (1,2,4,8,16);
2669     return ++$int;
2670 }
2671
2672 sub load_clusterfw_conf {
2673     my ($filename, $verbose) = @_;
2674
2675     $filename = $clusterfw_conf_filename if !defined($filename);
2676
2677     my $cluster_conf = {};
2678     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2679         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2680     }
2681
2682     return $cluster_conf;
2683 }
2684
2685 sub save_clusterfw_conf {
2686     my ($cluster_conf) = @_;
2687
2688     my $raw = '';
2689
2690     my $options = $cluster_conf->{options};
2691     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2692
2693     my $aliases = $cluster_conf->{aliases};
2694     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2695
2696     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2697
2698     my $rules = $cluster_conf->{rules};
2699     if ($rules && scalar(@$rules)) {
2700         $raw .= "[RULES]\n\n";
2701         $raw .= &$format_rules($rules, 1);
2702         $raw .= "\n";
2703     }
2704
2705     if ($cluster_conf->{groups}) {
2706         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2707             my $rules = $cluster_conf->{groups}->{$group};
2708             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2709                 my $utf8comment = encode('utf8', $comment);
2710                 $raw .= "[group $group] # $utf8comment\n\n";
2711             } else {
2712                 $raw .= "[group $group]\n\n";
2713             }
2714
2715             $raw .= &$format_rules($rules, 0);
2716             $raw .= "\n";
2717         }
2718     }
2719
2720     mkdir $pvefw_conf_dir;
2721     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2722 }
2723
2724 sub load_hostfw_conf {
2725     my ($cluster_conf, $filename, $verbose) = @_;
2726
2727     $filename = $hostfw_conf_filename if !defined($filename);
2728
2729     my $hostfw_conf = {};
2730     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2731         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2732     }
2733     return $hostfw_conf;
2734 }
2735
2736 sub save_hostfw_conf {
2737     my ($hostfw_conf) = @_;
2738
2739     my $raw = '';
2740
2741     my $options = $hostfw_conf->{options};
2742     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2743
2744     my $rules = $hostfw_conf->{rules};
2745     if ($rules && scalar(@$rules)) {
2746         $raw .= "[RULES]\n\n";
2747         $raw .= &$format_rules($rules, 1);
2748         $raw .= "\n";
2749     }
2750
2751     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2752 }
2753
2754 sub compile {
2755     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2756
2757     my $vmfw_configs;
2758
2759     if ($vmdata) { # test mode
2760         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2761         my $filename = "$testdir/cluster.fw";
2762         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2763
2764         $filename = "$testdir/host.fw";
2765         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2766
2767         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2768     } else { # normal operation
2769         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2770
2771         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2772
2773         $vmdata = read_local_vm_config();
2774         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2775     }
2776
2777     $cluster_conf->{ipset}->{venet0} = [];
2778     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2779
2780     my $localnet;
2781     if ($cluster_conf->{aliases}->{local_network}) {
2782         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2783     } else {
2784         $localnet = local_network() || '127.0.0.0/8';
2785         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2786     }
2787
2788     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2789
2790     return ({}, {}) if !$cluster_conf->{options}->{enable};
2791
2792     my $ruleset = {};
2793
2794     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2795     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2796
2797     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2798
2799     my $hostfw_options = $hostfw_conf->{options} || {};
2800
2801     # fixme: what log level should we use here?
2802     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2803
2804     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2805
2806
2807     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2808     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2809     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2810
2811     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2812     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2813
2814     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2815
2816     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2817     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2818
2819     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2820     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2821
2822     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2823
2824     generate_std_chains($ruleset, $hostfw_options);
2825
2826     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2827
2828     my $ipset_ruleset = {};
2829
2830     if ($hostfw_enable) {
2831         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2832         warn $@ if $@; # just to be sure - should not happen
2833     }
2834
2835     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2836
2837     # generate firewall rules for QEMU VMs
2838     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2839         eval {
2840             my $conf = $vmdata->{qemu}->{$vmid};
2841             my $vmfw_conf = $vmfw_configs->{$vmid};
2842             return if !$vmfw_conf;
2843             return if !$vmfw_conf->{options}->{enable};
2844
2845             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2846
2847             foreach my $netid (keys %$conf) {
2848                 next if $netid !~ m/^net(\d+)$/;
2849                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2850                 next if !$net->{firewall};
2851                 my $iface = "tap${vmid}i$1";
2852
2853                 my $macaddr = $net->{macaddr};
2854                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2855                                              $vmfw_conf, $vmid, 'IN');
2856                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2857                                              $vmfw_conf, $vmid, 'OUT');
2858             }
2859         };
2860         warn $@ if $@; # just to be sure - should not happen
2861     }
2862
2863     # generate firewall rules for OpenVZ containers
2864     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2865         eval {
2866             my $conf = $vmdata->{openvz}->{$vmid};
2867
2868             my $vmfw_conf = $vmfw_configs->{$vmid};
2869             return if !$vmfw_conf;
2870             return if !$vmfw_conf->{options}->{enable};
2871
2872             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2873
2874             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2875                 my $ip = $conf->{ip_address}->{value};
2876                 $ip =~ s/\s+/,/g;
2877                 parse_address_list($ip); # make sure we have a valid $ip list
2878
2879                 my @ips = split(',', $ip);
2880
2881                 foreach my $singleip (@ips) {
2882                     my $venet0ipset = {};
2883                     $venet0ipset->{cidr} = $singleip;
2884                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2885                 }
2886
2887                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2888                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2889             }
2890
2891             if ($conf->{netif} && $conf->{netif}->{value}) {
2892                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2893                 foreach my $netid (keys %$netif) {
2894                     my $d = $netif->{$netid};
2895
2896                     my $macaddr = $d->{mac};
2897                     my $iface = $d->{host_ifname};
2898                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2899                                                  $vmfw_conf, $vmid, 'IN');
2900                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2901                                                  $vmfw_conf, $vmid, 'OUT');
2902                 }
2903             }
2904         };
2905         warn $@ if $@; # just to be sure - should not happen
2906     }
2907
2908     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2909         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2910     }
2911
2912     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2913
2914     return ($ruleset, $ipset_ruleset);
2915 }
2916
2917 sub get_ruleset_status {
2918     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2919
2920     my $statushash = {};
2921
2922     foreach my $chain (sort keys %$ruleset) {
2923         my $sig = &$digest_fn($ruleset->{$chain});
2924
2925         $statushash->{$chain}->{sig} = $sig;
2926
2927         my $oldsig = $active_chains->{$chain};
2928         if (!defined($oldsig)) {
2929             $statushash->{$chain}->{action} = 'create';
2930         } else {
2931             if ($oldsig eq $sig) {
2932                 $statushash->{$chain}->{action} = 'exists';
2933             } else {
2934                 $statushash->{$chain}->{action} = 'update';
2935             }
2936         }
2937         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2938         foreach my $cmd (@{$ruleset->{$chain}}) {
2939             print "\t$cmd\n" if $verbose;
2940         }
2941     }
2942
2943     foreach my $chain (sort keys %$active_chains) {
2944         if (!defined($ruleset->{$chain})) {
2945             my $sig = $active_chains->{$chain};
2946             $statushash->{$chain}->{action} = 'delete';
2947             $statushash->{$chain}->{sig} = $sig;
2948             print "delete $chain ($sig)\n" if $verbose;
2949         }
2950     }
2951
2952     return $statushash;
2953 }
2954
2955 sub print_sig_rule {
2956     my ($chain, $sig) = @_;
2957
2958     # We just use this to store a SHA1 checksum used to detect changes
2959     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2960 }
2961
2962 sub get_ruleset_cmdlist {
2963     my ($ruleset, $verbose) = @_;
2964
2965     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2966
2967     my ($active_chains, $hooks) = iptables_get_chains();
2968     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2969
2970     # create missing chains first
2971     foreach my $chain (sort keys %$ruleset) {
2972         my $stat = $statushash->{$chain};
2973         die "internal error" if !$stat;
2974         next if $stat->{action} ne 'create';
2975
2976         $cmdlist .= ":$chain - [0:0]\n";
2977     }
2978
2979     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2980         my $chain = "PVEFW-$h";
2981         if ($ruleset->{$chain} && !$hooks->{$h}) {
2982             $cmdlist .= "-A $h -j $chain\n";
2983         }
2984     }
2985
2986     foreach my $chain (sort keys %$ruleset) {
2987         my $stat = $statushash->{$chain};
2988         die "internal error" if !$stat;
2989
2990         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2991             $cmdlist .= "-F $chain\n";
2992             foreach my $cmd (@{$ruleset->{$chain}}) {
2993                 $cmdlist .= "$cmd\n";
2994             }
2995             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2996         } elsif ($stat->{action} eq 'delete') {
2997             die "internal error"; # this should not happen
2998         } elsif ($stat->{action} eq 'exists') {
2999             # do nothing
3000         } else {
3001             die "internal error - unknown status '$stat->{action}'";
3002         }
3003     }
3004
3005     foreach my $chain (keys %$statushash) {
3006         next if $statushash->{$chain}->{action} ne 'delete';
3007         $cmdlist .= "-F $chain\n";
3008     }
3009     foreach my $chain (keys %$statushash) {
3010         next if $statushash->{$chain}->{action} ne 'delete';
3011         next if $chain eq 'PVEFW-INPUT';
3012         next if $chain eq 'PVEFW-OUTPUT';
3013         next if $chain eq 'PVEFW-FORWARD';
3014         $cmdlist .= "-X $chain\n";
3015     }
3016
3017     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3018
3019     $cmdlist .= "COMMIT\n";
3020
3021     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3022 }
3023
3024 sub get_ipset_cmdlist {
3025     my ($ruleset, $verbose) = @_;
3026
3027     my $cmdlist = "";
3028
3029     my $delete_cmdlist = "";
3030
3031     my $active_chains = ipset_get_chains();
3032     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3033
3034     # remove stale _swap chains
3035     foreach my $chain (keys %$active_chains) {
3036         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3037             $cmdlist .= "destroy $chain\n";
3038         }
3039     }
3040
3041     foreach my $chain (sort keys %$ruleset) {
3042         my $stat = $statushash->{$chain};
3043         die "internal error" if !$stat;
3044
3045         if ($stat->{action} eq 'create') {
3046             foreach my $cmd (@{$ruleset->{$chain}}) {
3047                 $cmdlist .= "$cmd\n";
3048             }
3049         }
3050
3051         if ($stat->{action} eq 'update') {
3052             my $chain_swap = $chain."_swap";
3053
3054             foreach my $cmd (@{$ruleset->{$chain}}) {
3055                 $cmd =~ s/$chain/$chain_swap/;
3056                 $cmdlist .= "$cmd\n";
3057             }
3058             $cmdlist .= "swap $chain_swap $chain\n";
3059             $cmdlist .= "flush $chain_swap\n";
3060             $cmdlist .= "destroy $chain_swap\n";
3061         }
3062
3063     }
3064
3065     foreach my $chain (keys %$statushash) {
3066         next if $statushash->{$chain}->{action} ne 'delete';
3067
3068         $delete_cmdlist .= "flush $chain\n";
3069         $delete_cmdlist .= "destroy $chain\n";
3070     }
3071
3072     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3073
3074     return ($cmdlist, $delete_cmdlist, $changes);
3075 }
3076
3077 sub apply_ruleset {
3078     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3079
3080     enable_bridge_firewall();
3081
3082     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3083         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3084
3085     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3086
3087     if ($verbose) {
3088         if ($ipset_changes) {
3089             print "ipset changes:\n";
3090             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3091             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3092         }
3093
3094         if ($changes) {
3095             print "iptables changes:\n";
3096             print $cmdlist;
3097         }
3098     }
3099
3100     ipset_restore_cmdlist($ipset_create_cmdlist);
3101
3102     iptables_restore_cmdlist($cmdlist);
3103
3104     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3105
3106     # test: re-read status and check if everything is up to date
3107     my $active_chains = iptables_get_chains();
3108     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3109
3110     my $errors;
3111     foreach my $chain (sort keys %$ruleset) {
3112         my $stat = $statushash->{$chain};
3113         if ($stat->{action} ne 'exists') {
3114             warn "unable to update chain '$chain'\n";
3115             $errors = 1;
3116         }
3117     }
3118
3119     die "unable to apply firewall changes\n" if $errors;
3120
3121     update_nf_conntrack_max($hostfw_conf);
3122
3123     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3124
3125 }
3126
3127 sub update_nf_conntrack_max {
3128     my ($hostfw_conf) = @_;
3129
3130     my $max = 65536; # reasonable default
3131
3132     my $options = $hostfw_conf->{options} || {};
3133
3134     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3135         $max = $options->{nf_conntrack_max};
3136         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3137     }
3138
3139     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3140     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3141
3142     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3143
3144     if ($current != $max) {
3145         my $hashsize = int($max/4);
3146         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3147         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3148     }
3149 }
3150
3151 sub update_nf_conntrack_tcp_timeout_established {
3152     my ($hostfw_conf) = @_;
3153
3154     my $options = $hostfw_conf->{options} || {};
3155
3156     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3157
3158     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3159 }
3160
3161 sub remove_pvefw_chains {
3162
3163     my ($chash, $hooks) = iptables_get_chains();
3164     my $cmdlist = "*filter\n";
3165
3166     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3167         if ($hooks->{$h}) {
3168             $cmdlist .= "-D $h -j PVEFW-$h\n";
3169         }
3170     }
3171
3172     foreach my $chain (keys %$chash) {
3173         $cmdlist .= "-F $chain\n";
3174     }
3175
3176     foreach my $chain (keys %$chash) {
3177         $cmdlist .= "-X $chain\n";
3178     }
3179     $cmdlist .= "COMMIT\n";
3180
3181     iptables_restore_cmdlist($cmdlist);
3182
3183     my $ipset_chains = ipset_get_chains();
3184
3185     $cmdlist = "";
3186
3187     foreach my $chain (keys %$ipset_chains) {
3188        $cmdlist .= "flush $chain\n";
3189        $cmdlist .= "destroy $chain\n";
3190     }
3191
3192     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3193 }
3194
3195 sub init {
3196     my $cluster_conf = load_clusterfw_conf();
3197     my $cluster_options = $cluster_conf->{options};
3198     my $enable = $cluster_options->{enable};
3199
3200     return if !$enable;
3201
3202     # load required modules here
3203 }
3204
3205 sub update {
3206     my $code = sub {
3207
3208         my $cluster_conf = load_clusterfw_conf();
3209         my $cluster_options = $cluster_conf->{options};
3210
3211         if (!$cluster_options->{enable}) {
3212             PVE::Firewall::remove_pvefw_chains();
3213             return;
3214         }
3215
3216         my $hostfw_conf = load_hostfw_conf();
3217
3218         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3219
3220         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3221     };
3222
3223     run_locked($code);
3224 }
3225
3226 1;