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 Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 my $nodename = PVE::INotify::nodename();
 117
 118 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 119
 120 my $default_log_level = 'nolog'; # avoid logs by default
 121
 122 my $log_level_hash = {
 123     debug => 7,
 124     info => 6,
 125     notice => 5,
 126     warning => 4,
 127     err => 3,
 128     crit => 2,
 129     alert => 1,
 130     emerg => 0,
 131 };
 132
 133 # we need to overwrite some macros for ipv6
 134 my $pve_ipv6fw_macros = {
 135     'Ping' => [
 136         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 137     ],
 138     'Trcrt' => [
 139         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 140         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 141     ],
 142  };
 143
 144 # imported/converted from: /usr/share/shorewall/macro.*
 145 my $pve_fw_macros = {
 146     'Amanda' => [
 147         "Amanda Backup",
 148         { action => 'PARAM', proto => 'udp', dport => '10080' },
 149         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 150     ],
 151     'Auth' => [
 152         "Auth (identd) traffic",
 153         { action => 'PARAM', proto => 'tcp', dport => '113' },
 154     ],
 155     'BGP' => [
 156         "Border Gateway Protocol traffic",
 157         { action => 'PARAM', proto => 'tcp', dport => '179' },
 158     ],
 159     'BitTorrent' => [
 160         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 161         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 162         { action => 'PARAM', proto => 'udp', dport => '6881' },
 163     ],
 164     'BitTorrent32' => [
 165         "BitTorrent traffic for BitTorrent 3.2 and later",
 166         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 167         { action => 'PARAM', proto => 'udp', dport => '6881' },
 168     ],
 169     'Ceph' => [
 170         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 171         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 172         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 173     ],
 174     'CVS' => [
 175         "Concurrent Versions System pserver traffic",
 176         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 177     ],
 178     'Citrix' => [
 179         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 180         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 181         { action => 'PARAM', proto => 'udp', dport => '1604' },
 182         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 183     ],
 184     'DAAP' => [
 185         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 186         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 187         { action => 'PARAM', proto => 'udp', dport => '3689' },
 188     ],
 189     'DCC' => [
 190         "Distributed Checksum Clearinghouse spam filtering mechanism",
 191         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 192     ],
 193     'DHCPfwd' => [
 194         "Forwarded DHCP traffic",
 195         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 196     ],
 197     'DNS' => [
 198         "Domain Name System traffic (upd and tcp)",
 199         { action => 'PARAM', proto => 'udp', dport => '53' },
 200         { action => 'PARAM', proto => 'tcp', dport => '53' },
 201     ],
 202     'Distcc' => [
 203         "Distributed Compiler service",
 204         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 205     ],
 206     'FTP' => [
 207         "File Transfer Protocol",
 208         { action => 'PARAM', proto => 'tcp', dport => '21' },
 209     ],
 210     'Finger' => [
 211         "Finger protocol (RFC 742)",
 212         { action => 'PARAM', proto => 'tcp', dport => '79' },
 213     ],
 214     'GNUnet' => [
 215         "GNUnet secure peer-to-peer networking traffic",
 216         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 217         { action => 'PARAM', proto => 'udp', dport => '2086' },
 218         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 219         { action => 'PARAM', proto => 'udp', dport => '1080' },
 220     ],
 221     'GRE' => [
 222         "Generic Routing Encapsulation tunneling protocol",
 223         { action => 'PARAM', proto => '47' },
 224     ],
 225     'Git' => [
 226         "Git distributed revision control traffic",
 227         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 228     ],
 229     'HKP' => [
 230         "OpenPGP HTTP keyserver protocol traffic",
 231         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 232     ],
 233     'HTTP' => [
 234         "Hypertext Transfer Protocol (WWW)",
 235         { action => 'PARAM', proto => 'tcp', dport => '80' },
 236     ],
 237     'HTTPS' => [
 238         "Hypertext Transfer Protocol (WWW) over SSL",
 239         { action => 'PARAM', proto => 'tcp', dport => '443' },
 240     ],
 241     'ICPV2' => [
 242         "Internet Cache Protocol V2 (Squid) traffic",
 243         { action => 'PARAM', proto => 'udp', dport => '3130' },
 244     ],
 245     'ICQ' => [
 246         "AOL Instant Messenger traffic",
 247         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 248     ],
 249     'IMAP' => [
 250         "Internet Message Access Protocol",
 251         { action => 'PARAM', proto => 'tcp', dport => '143' },
 252     ],
 253     'IMAPS' => [
 254         "Internet Message Access Protocol over SSL",
 255         { action => 'PARAM', proto => 'tcp', dport => '993' },
 256     ],
 257     'IPIP' => [
 258         "IPIP capsulation traffic",
 259         { action => 'PARAM', proto => '94' },
 260     ],
 261     'IPsec' => [
 262         "IPsec traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 264         { action => 'PARAM', proto => '50' },
 265     ],
 266     'IPsecah' => [
 267         "IPsec authentication (AH) traffic",
 268         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 269         { action => 'PARAM', proto => '51' },
 270     ],
 271     'IPsecnat' => [
 272         "IPsec traffic and Nat-Traversal",
 273         { action => 'PARAM', proto => 'udp', dport => '500' },
 274         { action => 'PARAM', proto => 'udp', dport => '4500' },
 275         { action => 'PARAM', proto => '50' },
 276     ],
 277     'IRC' => [
 278         "Internet Relay Chat traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 280     ],
 281     'Jetdirect' => [
 282         "HP Jetdirect printing",
 283         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 284     ],
 285     'L2TP' => [
 286         "Layer 2 Tunneling Protocol traffic",
 287         { action => 'PARAM', proto => 'udp', dport => '1701' },
 288     ],
 289     'LDAP' => [
 290         "Lightweight Directory Access Protocol traffic",
 291         { action => 'PARAM', proto => 'tcp', dport => '389' },
 292     ],
 293     'LDAPS' => [
 294         "Secure Lightweight Directory Access Protocol traffic",
 295         { action => 'PARAM', proto => 'tcp', dport => '636' },
 296     ],
 297     'MSNP' => [
 298         "Microsoft Notification Protocol",
 299         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 300     ],
 301     'MSSQL' => [
 302         "Microsoft SQL Server",
 303         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 304     ],
 305     'Mail' => [
 306         "Mail traffic (SMTP, SMTPS, Submission)",
 307         { action => 'PARAM', proto => 'tcp', dport => '25' },
 308         { action => 'PARAM', proto => 'tcp', dport => '465' },
 309         { action => 'PARAM', proto => 'tcp', dport => '587' },
 310     ],
 311     'Munin' => [
 312         "Munin networked resource monitoring traffic",
 313         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 314     ],
 315     'MySQL' => [
 316         "MySQL server",
 317         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 318     ],
 319     'NNTP' => [
 320         "NNTP traffic (Usenet).",
 321         { action => 'PARAM', proto => 'tcp', dport => '119' },
 322     ],
 323     'NNTPS' => [
 324         "Encrypted NNTP traffic (Usenet)",
 325         { action => 'PARAM', proto => 'tcp', dport => '563' },
 326     ],
 327     'NTP' => [
 328         "Network Time Protocol (ntpd)",
 329         { action => 'PARAM', proto => 'udp', dport => '123' },
 330     ],
 331     'OSPF' => [
 332         "OSPF multicast traffic",
 333         { action => 'PARAM', proto => '89' },
 334     ],
 335     'OpenVPN' => [
 336         "OpenVPN traffic",
 337         { action => 'PARAM', proto => 'udp', dport => '1194' },
 338     ],
 339     'PCA' => [
 340         "Symantec PCAnywere (tm)",
 341         { action => 'PARAM', proto => 'udp', dport => '5632' },
 342         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 343     ],
 344     'POP3' => [
 345         "POP3 traffic",
 346         { action => 'PARAM', proto => 'tcp', dport => '110' },
 347     ],
 348     'POP3S' => [
 349         "Encrypted POP3 traffic",
 350         { action => 'PARAM', proto => 'tcp', dport => '995' },
 351     ],
 352     'PPtP' => [
 353         "Point-to-Point Tunneling Protocol",
 354         { action => 'PARAM', proto => '47' },
 355         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 356     ],
 357     'Ping' => [
 358         "ICMP echo request",
 359         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 360     ],
 361     'PostgreSQL' => [
 362         "PostgreSQL server",
 363         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 364     ],
 365     'Printer' => [
 366         "Line Printer protocol printing",
 367         { action => 'PARAM', proto => 'tcp', dport => '515' },
 368     ],
 369     'RDP' => [
 370         "Microsoft Remote Desktop Protocol traffic",
 371         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 372     ],
 373     'RIP' => [
 374         "Routing Information Protocol (bidirectional)",
 375         { action => 'PARAM', proto => 'udp', dport => '520' },
 376     ],
 377     'RNDC' => [
 378         "BIND remote management protocol",
 379         { action => 'PARAM', proto => 'tcp', dport => '953' },
 380     ],
 381     'Razor' => [
 382         "Razor Antispam System",
 383         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 384     ],
 385     'Rdate' => [
 386         "Remote time retrieval (rdate)",
 387         { action => 'PARAM', proto => 'tcp', dport => '37' },
 388     ],
 389     'Rsync' => [
 390         "Rsync server",
 391         { action => 'PARAM', proto => 'tcp', dport => '873' },
 392     ],
 393     'SANE' => [
 394         "SANE network scanning",
 395         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 396     ],
 397     'SMB' => [
 398         "Microsoft SMB traffic",
 399         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 400         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 401         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 402         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 403     ],
 404     'SMBswat' => [
 405         "Samba Web Administration Tool",
 406         { action => 'PARAM', proto => 'tcp', dport => '901' },
 407     ],
 408     'SMTP' => [
 409         "Simple Mail Transfer Protocol",
 410         { action => 'PARAM', proto => 'tcp', dport => '25' },
 411     ],
 412     'SMTPS' => [
 413         "Encrypted Simple Mail Transfer Protocol",
 414         { action => 'PARAM', proto => 'tcp', dport => '465' },
 415     ],
 416     'SNMP' => [
 417         "Simple Network Management Protocol",
 418         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 419         { action => 'PARAM', proto => 'tcp', dport => '161' },
 420     ],
 421     'SPAMD' => [
 422         "Spam Assassin SPAMD traffic",
 423         { action => 'PARAM', proto => 'tcp', dport => '783' },
 424     ],
 425     'SSH' => [
 426         "Secure shell traffic",
 427         { action => 'PARAM', proto => 'tcp', dport => '22' },
 428     ],
 429     'SVN' => [
 430         "Subversion server (svnserve)",
 431         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 432     ],
 433     'SixXS' => [
 434         "SixXS IPv6 Deployment and Tunnel Broker",
 435         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 436         { action => 'PARAM', proto => 'udp', dport => '3740' },
 437         { action => 'PARAM', proto => '41' },
 438         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 439     ],
 440     'Squid' => [
 441         "Squid web proxy traffic",
 442         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 443     ],
 444     'Submission' => [
 445         "Mail message submission traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '587' },
 447     ],
 448     'Syslog' => [
 449         "Syslog protocol (RFC 5424) traffic",
 450         { action => 'PARAM', proto => 'udp', dport => '514' },
 451         { action => 'PARAM', proto => 'tcp', dport => '514' },
 452     ],
 453     'TFTP' => [
 454         "Trivial File Transfer Protocol traffic",
 455         { action => 'PARAM', proto => 'udp', dport => '69' },
 456     ],
 457     'Telnet' => [
 458         "Telnet traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '23' },
 460     ],
 461     'Telnets' => [
 462         "Telnet over SSL",
 463         { action => 'PARAM', proto => 'tcp', dport => '992' },
 464     ],
 465     'Time' => [
 466         "RFC 868 Time protocol",
 467         { action => 'PARAM', proto => 'tcp', dport => '37' },
 468     ],
 469     'Trcrt' => [
 470         "Traceroute (for up to 30 hops) traffic",
 471         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 472         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 473     ],
 474     'VNC' => [
 475         "VNC traffic for VNC display's 0 - 99",
 476         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 477     ],
 478     'VNCL' => [
 479         "VNC traffic from Vncservers to Vncviewers in listen mode",
 480         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 481     ],
 482     'Web' => [
 483         "WWW traffic (HTTP and HTTPS)",
 484         { action => 'PARAM', proto => 'tcp', dport => '80' },
 485         { action => 'PARAM', proto => 'tcp', dport => '443' },
 486     ],
 487     'Webcache' => [
 488         "Web Cache/Proxy traffic (port 8080)",
 489         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 490     ],
 491     'Webmin' => [
 492         "Webmin traffic",
 493         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 494     ],
 495     'Whois' => [
 496         "Whois (nicname, RFC 3912) traffic",
 497         { action => 'PARAM', proto => 'tcp', dport => '43' },
 498     ],
 499 };
 500
 501 my $pve_fw_parsed_macros;
 502 my $pve_fw_macro_descr;
 503 my $pve_fw_macro_ipversion = {};
 504 my $pve_fw_preferred_macro_names = {};
 505
 506 my $pve_std_chains = {};
 507 $pve_std_chains->{4} = {
 508     'PVEFW-SET-ACCEPT-MARK' => [
 509         "-j MARK --set-mark 1",
 510     ],
 511     'PVEFW-DropBroadcast' => [
 512         # same as shorewall 'Broadcast'
 513         # simply DROP BROADCAST/MULTICAST/ANYCAST
 514         # we can use this to reduce logging
 515         { action => 'DROP', dsttype => 'BROADCAST' },
 516         { action => 'DROP', dsttype => 'MULTICAST' },
 517         { action => 'DROP', dsttype => 'ANYCAST' },
 518         { action => 'DROP', dest => '224.0.0.0/4' },
 519     ],
 520     'PVEFW-reject' => [
 521         # same as shorewall 'reject'
 522         { action => 'DROP', dsttype => 'BROADCAST' },
 523         { action => 'DROP', source => '224.0.0.0/4' },
 524         { action => 'DROP', proto => 'icmp' },
 525         "-p tcp -j REJECT --reject-with tcp-reset",
 526         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 527         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 528         "-j REJECT --reject-with icmp-host-prohibited",
 529     ],
 530     'PVEFW-Drop' => [
 531         # same as shorewall 'Drop', which is equal to DROP,
 532         # but REJECT/DROP some packages to reduce logging,
 533         # and ACCEPT critical ICMP types
 534         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 535         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 536         { action => 'PVEFW-DropBroadcast' },
 537         # ACCEPT critical ICMP types
 538         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 539         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 540         # Drop packets with INVALID state
 541         "-m conntrack --ctstate INVALID -j DROP",
 542         # Drop Microsoft SMB noise
 543         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 544         { action => 'DROP', proto => 'udp', dport => '137:139'},
 545         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 546         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 547         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 548         # Drop new/NotSyn traffic so that it doesn't get logged
 549         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 550         # Drop DNS replies
 551         { action => 'DROP', proto => 'udp', sport => 53 },
 552     ],
 553     'PVEFW-Reject' => [
 554         # same as shorewall 'Reject', which is equal to Reject,
 555         # but REJECT/DROP some packages to reduce logging,
 556         # and ACCEPT critical ICMP types
 557         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 558         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 559         { action => 'PVEFW-DropBroadcast' },
 560         # ACCEPT critical ICMP types
 561         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 562         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 563         # Drop packets with INVALID state
 564         "-m conntrack --ctstate INVALID -j DROP",
 565         # Drop Microsoft SMB noise
 566         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 567         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 568         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 569         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 570         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 571         # Drop new/NotSyn traffic so that it doesn't get logged
 572         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 573         # Drop DNS replies
 574         { action => 'DROP', proto => 'udp', sport => 53 },
 575     ],
 576     'PVEFW-tcpflags' => [
 577         # same as shorewall tcpflags action.
 578         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 579         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 580         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 581         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 582         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 583         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 584     ],
 585     'PVEFW-smurfs' => [
 586         # same as shorewall smurfs action
 587         # Filter packets for smurfs (packets with a broadcast address as the source).
 588         "-s 0.0.0.0/32 -j RETURN",
 589         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 590         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 591     ],
 592 };
 593
 594 $pve_std_chains->{6} = {
 595     'PVEFW-SET-ACCEPT-MARK' => [
 596         "-j MARK --set-mark 1",
 597     ],
 598     'PVEFW-DropBroadcast' => [
 599         # same as shorewall 'Broadcast'
 600         # simply DROP BROADCAST/MULTICAST/ANYCAST
 601         # we can use this to reduce logging
 602         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 603         # ipv6 addrtype does not work with kernel 2.6.32
 604         #{ action => 'DROP', dsttype => 'MULTICAST' },
 605         #{ action => 'DROP', dsttype => 'ANYCAST' },
 606         { action => 'DROP', dest => 'ff00::/8' },
 607         #{ action => 'DROP', dest => '224.0.0.0/4' },
 608     ],
 609     'PVEFW-reject' => [
 610         # same as shorewall 'reject'
 611         #{ action => 'DROP', dsttype => 'BROADCAST' },
 612         #{ action => 'DROP', source => '224.0.0.0/4' },
 613         { action => 'DROP', proto => 'icmpv6' },
 614         "-p tcp -j REJECT --reject-with tcp-reset",
 615         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 616         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 617         #"-j REJECT --reject-with icmp-host-prohibited",
 618     ],
 619     'PVEFW-Drop' => [
 620         # same as shorewall 'Drop', which is equal to DROP,
 621         # but REJECT/DROP some packages to reduce logging,
 622         # and ACCEPT critical ICMP types
 623         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 624         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 625         { action => 'PVEFW-DropBroadcast' },
 626         # ACCEPT critical ICMP types
 627         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 628         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 629         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 630
 631         # Drop packets with INVALID state
 632         "-m conntrack --ctstate INVALID -j DROP",
 633         # Drop Microsoft SMB noise
 634         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 635         { action => 'DROP', proto => 'udp', dport => '137:139'},
 636         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 637         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 638         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 639         # Drop new/NotSyn traffic so that it doesn't get logged
 640         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 641         # Drop DNS replies
 642         { action => 'DROP', proto => 'udp', sport => 53 },
 643     ],
 644     'PVEFW-Reject' => [
 645         # same as shorewall 'Reject', which is equal to Reject,
 646         # but REJECT/DROP some packages to reduce logging,
 647         # and ACCEPT critical ICMP types
 648         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 649         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 650         { action => 'PVEFW-DropBroadcast' },
 651         # ACCEPT critical ICMP types
 652         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 653         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 654         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 655
 656         # Drop packets with INVALID state
 657         "-m conntrack --ctstate INVALID -j DROP",
 658         # Drop Microsoft SMB noise
 659         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 660         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 661         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 662         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 663         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 664         # Drop new/NotSyn traffic so that it doesn't get logged
 665         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 666         # Drop DNS replies
 667         { action => 'DROP', proto => 'udp', sport => 53 },
 668     ],
 669     'PVEFW-tcpflags' => [
 670         # same as shorewall tcpflags action.
 671         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 672         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 673         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 674         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 675         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 676         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 677     ],
 678 };
 679
 680 # iptables -p icmp -h
 681 my $icmp_type_names = {
 682     any => 1,
 683     'echo-reply' => 1,
 684     'destination-unreachable' => 1,
 685     'network-unreachable' => 1,
 686     'host-unreachable' => 1,
 687     'protocol-unreachable' => 1,
 688     'port-unreachable' => 1,
 689     'fragmentation-needed' => 1,
 690     'source-route-failed' => 1,
 691     'network-unknown' => 1,
 692     'host-unknown' => 1,
 693     'network-prohibited' => 1,
 694     'host-prohibited' => 1,
 695     'TOS-network-unreachable' => 1,
 696     'TOS-host-unreachable' => 1,
 697     'communication-prohibited' => 1,
 698     'host-precedence-violation' => 1,
 699     'precedence-cutoff' => 1,
 700     'source-quench' => 1,
 701     'redirect' => 1,
 702     'network-redirect' => 1,
 703     'host-redirect' => 1,
 704     'TOS-network-redirect' => 1,
 705     'TOS-host-redirect' => 1,
 706     'echo-request' => 1,
 707     'router-advertisement' => 1,
 708     'router-solicitation' => 1,
 709     'time-exceeded' => 1,
 710     'ttl-zero-during-transit' => 1,
 711     'ttl-zero-during-reassembly' => 1,
 712     'parameter-problem' => 1,
 713     'ip-header-bad' => 1,
 714     'required-option-missing' => 1,
 715     'timestamp-request' => 1,
 716     'timestamp-reply' => 1,
 717     'address-mask-request' => 1,
 718     'address-mask-reply' => 1,
 719 };
 720
 721 # ip6tables -p icmpv6 -h
 722
 723 my $icmpv6_type_names = {
 724     'any' => 1,
 725     'destination-unreachable' => 1,
 726     'no-route' => 1,
 727     'communication-prohibited' => 1,
 728     'address-unreachable' => 1,
 729     'port-unreachable' => 1,
 730     'packet-too-big' => 1,
 731     'time-exceeded' => 1,
 732     'ttl-zero-during-transit' => 1,
 733     'ttl-zero-during-reassembly' => 1,
 734     'parameter-problem' => 1,
 735     'bad-header' => 1,
 736     'unknown-header-type' => 1,
 737     'unknown-option' => 1,
 738     'echo-request' => 1,
 739     'echo-reply' => 1,
 740     'router-solicitation' => 1,
 741     'router-advertisement' => 1,
 742     'neighbor-solicitation' => 1,
 743     'neighbour-solicitation' => 1,
 744     'neighbor-advertisement' => 1,
 745     'neighbour-advertisement' => 1,
 746     'redirect' => 1,
 747 };
 748
 749 sub init_firewall_macros {
 750
 751     $pve_fw_parsed_macros = {};
 752
 753     my $parse = sub {
 754         my ($k, $macro) = @_;
 755         my $lc_name = lc($k);
 756         $pve_fw_macro_ipversion->{$k} = 0;
 757         while (!ref($macro->[0])) {
 758             my $desc = shift @$macro;
 759             if ($desc eq 'ipv4only') {
 760                 $pve_fw_macro_ipversion->{$k} = 4;
 761             } elsif ($desc eq 'ipv6only') {
 762                 $pve_fw_macro_ipversion->{$k} = 6;
 763             } else {
 764                 $pve_fw_macro_descr->{$k} = $desc;
 765             }
 766         }
 767         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 768         $pve_fw_parsed_macros->{$k} = $macro;
 769     };
 770
 771     foreach my $k (keys %$pve_fw_macros) {
 772         &$parse($k, $pve_fw_macros->{$k});
 773     }
 774
 775     foreach my $k (keys %$pve_ipv6fw_macros) {
 776         next if $pve_fw_parsed_macros->{$k};
 777         &$parse($k, $pve_ipv6fw_macros->{$k});
 778         $pve_fw_macro_ipversion->{$k} = 6;
 779     }
 780 }
 781
 782 init_firewall_macros();
 783
 784 sub get_macros {
 785     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 786 }
 787
 788 my $etc_services;
 789
 790 sub get_etc_services {
 791
 792     return $etc_services if $etc_services;
 793
 794     my $filename = "/etc/services";
 795
 796     my $fh = IO::File->new($filename, O_RDONLY);
 797     if (!$fh) {
 798         warn "unable to read '$filename' - $!\n";
 799         return {};
 800     }
 801
 802     my $services = {};
 803
 804     while (my $line = <$fh>) {
 805         chomp ($line);
 806         next if $line =~m/^#/;
 807         next if ($line =~m/^\s*$/);
 808
 809         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 810             $services->{byid}->{$2}->{name} = $1;
 811             $services->{byid}->{$2}->{port} = $2;
 812             $services->{byid}->{$2}->{$3} = 1;
 813             $services->{byname}->{$1} = $services->{byid}->{$2};
 814         }
 815     }
 816
 817     close($fh);
 818
 819     $etc_services = $services;
 820
 821
 822     return $etc_services;
 823 }
 824
 825 my $etc_protocols;
 826
 827 sub get_etc_protocols {
 828     return $etc_protocols if $etc_protocols;
 829
 830     my $filename = "/etc/protocols";
 831
 832     my $fh = IO::File->new($filename, O_RDONLY);
 833     if (!$fh) {
 834         warn "unable to read '$filename' - $!\n";
 835         return {};
 836     }
 837
 838     my $protocols = {};
 839
 840     while (my $line = <$fh>) {
 841         chomp ($line);
 842         next if $line =~m/^#/;
 843         next if ($line =~m/^\s*$/);
 844
 845         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 846             $protocols->{byid}->{$2}->{name} = $1;
 847             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 848         }
 849     }
 850
 851     close($fh);
 852
 853     # add special case for ICMP v6
 854     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 855     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 856
 857     $etc_protocols = $protocols;
 858
 859     return $etc_protocols;
 860 }
 861
 862 my $ipv4_mask_hash_localnet = {
 863     '255.255.0.0' => 16,
 864     '255.255.128.0' => 17,
 865     '255.255.192.0' => 18,
 866     '255.255.224.0' => 19,
 867     '255.255.240.0' => 20,
 868     '255.255.248.0' => 21,
 869     '255.255.252.0' => 22,
 870     '255.255.254.0' => 23,
 871     '255.255.255.0' => 24,
 872     '255.255.255.128' => 25,
 873     '255.255.255.192' => 26,
 874     '255.255.255.224' => 27,
 875     '255.255.255.240' => 28,
 876     '255.255.255.248' => 29,
 877     '255.255.255.252' => 30,
 878 };
 879
 880 my $__local_network;
 881
 882 sub local_network {
 883     my ($new_value) = @_;
 884
 885     $__local_network = $new_value if defined($new_value);
 886
 887     return $__local_network if defined($__local_network);
 888
 889     eval {
 890         my $nodename = PVE::INotify::nodename();
 891
 892         my $ip = PVE::Cluster::remote_node_ip($nodename);
 893
 894         my $testip = Net::IP->new($ip);
 895
 896         my $routes = PVE::ProcFSTools::read_proc_net_route();
 897         foreach my $entry (@$routes) {
 898             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 899             next if !defined($mask);
 900             return if $mask eq '0.0.0.0';
 901             my $cidr = "$entry->{dest}/$mask";
 902             my $testnet = Net::IP->new($cidr);
 903             if ($testnet->overlaps($testip)) {
 904                 $__local_network = $cidr;
 905                 return;
 906             }
 907         }
 908     };
 909     warn $@ if $@;
 910
 911     return $__local_network;
 912 }
 913
 914 # ipset names are limited to 31 characters,
 915 # and we use '-v4' or '-v6' to indicate IP versions,
 916 # and we use '_swap' suffix for atomic update,
 917 # for example PVEFW-${VMID}-${ipset_name}_swap
 918
 919 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 920
 921 sub compute_ipset_chain_name {
 922     my ($vmid, $ipset_name, $ipversion) = @_;
 923
 924     $vmid = 0 if !defined($vmid);
 925
 926     my $id = "$vmid-${ipset_name}-v$ipversion";
 927
 928     if (length($id) > $max_iptables_ipset_name_length) {
 929         $id = PVE::Tools::fnv31a_hex($id);
 930     }
 931
 932     return "PVEFW-$id";
 933 }
 934
 935 sub compute_ipfilter_ipset_name {
 936     my ($iface) = @_;
 937
 938     return "ipfilter-$iface";
 939 }
 940
 941 sub parse_address_list {
 942     my ($str) = @_;
 943
 944     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 945         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 946         return;
 947     }
 948
 949     if ($str =~ m/^${ip_alias_pattern}$/) {
 950         die "alias name too long\n" if length($str) > $max_alias_name_length;
 951         return;
 952     }
 953
 954     my $count = 0;
 955     my $iprange = 0;
 956     my $ipversion;
 957
 958     foreach my $elem (split(/,/, $str)) {
 959         $count++;
 960         my $ip = Net::IP->new($elem);
 961         if (!$ip) {
 962             my $err = Net::IP::Error();
 963             die "invalid IP address: $err\n";
 964         }
 965         $iprange = 1 if $elem =~ m/-/;
 966
 967         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 968
 969         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 970             if $ipversion && ($new_ipversion != $ipversion);
 971
 972         $ipversion = $new_ipversion;
 973     }
 974
 975     die "you can't use a range in a list\n" if $iprange && $count > 1;
 976
 977     return $ipversion;
 978 }
 979
 980 sub parse_port_name_number_or_range {
 981     my ($str) = @_;
 982
 983     my $services = PVE::Firewall::get_etc_services();
 984     my $count = 0;
 985     my $icmp_port = 0;
 986
 987     foreach my $item (split(/,/, $str)) {
 988         $count++;
 989         if ($item =~ m/^(\d+):(\d+)$/) {
 990             my ($port1, $port2) = ($1, $2);
 991             die "invalid port '$port1'\n" if $port1 > 65535;
 992             die "invalid port '$port2'\n" if $port2 > 65535;
 993         } elsif ($item =~ m/^(\d+)$/) {
 994             my $port = $1;
 995             die "invalid port '$port'\n" if $port > 65535;
 996         } else {
 997             if ($icmp_type_names->{$item}) {
 998                 $icmp_port = 1;
 999             } elsif ($icmpv6_type_names->{$item}) {
1000                 $icmp_port = 1;
1001             } else {
1002                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1003             }
1004         }
1005     }
1006
1007     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1008
1009     return $count;
1010 }
1011
1012 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1013 sub pve_fw_verify_port_spec {
1014    my ($portstr) = @_;
1015
1016    parse_port_name_number_or_range($portstr);
1017
1018    return $portstr;
1019 }
1020
1021 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1022 sub pve_fw_verify_addr_spec {
1023    my ($list) = @_;
1024
1025    parse_address_list($list);
1026
1027    return $list;
1028 }
1029
1030 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1031 sub pve_fw_verify_protocol_spec {
1032    my ($proto) = @_;
1033
1034    my $protocols = get_etc_protocols();
1035
1036    die "unknown protocol '$proto'\n" if $proto &&
1037        !(defined($protocols->{byname}->{$proto}) ||
1038          defined($protocols->{byid}->{$proto}));
1039
1040    return $proto;
1041 }
1042
1043
1044 # helper function for API
1045
1046 sub copy_opject_with_digest {
1047     my ($object) = @_;
1048
1049     my $sha = Digest::SHA->new('sha1');
1050
1051     my $res = {};
1052     foreach my $k (sort keys %$object) {
1053         my $v = $object->{$k};
1054         next if !defined($v);
1055         $res->{$k} = $v;
1056         $sha->add($k, ':', $v, "\n");
1057     }
1058
1059     my $digest = $sha->hexdigest;
1060
1061     $res->{digest} = $digest;
1062
1063     return wantarray ? ($res, $digest) : $res;
1064 }
1065
1066 sub copy_list_with_digest {
1067     my ($list) = @_;
1068
1069     my $sha = Digest::SHA->new('sha1');
1070
1071     my $res = [];
1072     foreach my $entry (@$list) {
1073         my $data = {};
1074         foreach my $k (sort keys %$entry) {
1075             my $v = $entry->{$k};
1076             next if !defined($v);
1077             $data->{$k} = $v;
1078             # Note: digest ignores refs ($rule->{errors})
1079             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1080         }
1081         push @$res, $data;
1082     }
1083
1084     my $digest = $sha->hexdigest;
1085
1086     foreach my $entry (@$res) {
1087         $entry->{digest} = $digest;
1088     }
1089
1090     return wantarray ? ($res, $digest) : $res;
1091 }
1092
1093 my $rule_properties = {
1094     pos => {
1095         description => "Update rule at position <pos>.",
1096         type => 'integer',
1097         minimum => 0,
1098         optional => 1,
1099     },
1100     digest => get_standard_option('pve-config-digest'),
1101     type => {
1102         type => 'string',
1103         optional => 1,
1104         enum => ['in', 'out', 'group'],
1105     },
1106     action => {
1107         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1108         type => 'string',
1109         optional => 1,
1110         pattern => $security_group_name_pattern,
1111         maxLength => 20,
1112         minLength => 2,
1113     },
1114     macro => {
1115         type => 'string',
1116         optional => 1,
1117         maxLength => 128,
1118     },
1119     iface => get_standard_option('pve-iface', { optional => 1 }),
1120     source => {
1121         type => 'string', format => 'pve-fw-addr-spec',
1122         optional => 1,
1123     },
1124     dest => {
1125         type => 'string', format => 'pve-fw-addr-spec',
1126         optional => 1,
1127     },
1128     proto => {
1129         type => 'string', format => 'pve-fw-protocol-spec',
1130         optional => 1,
1131     },
1132     enable => {
1133         type => 'integer',
1134         minimum => 0,
1135         optional => 1,
1136     },
1137     sport => {
1138         type => 'string', format => 'pve-fw-port-spec',
1139         optional => 1,
1140     },
1141     dport => {
1142         type => 'string', format => 'pve-fw-port-spec',
1143         optional => 1,
1144     },
1145     comment => {
1146         type => 'string',
1147         optional => 1,
1148     },
1149 };
1150
1151 sub add_rule_properties {
1152     my ($properties) = @_;
1153
1154     foreach my $k (keys %$rule_properties) {
1155         my $h = $rule_properties->{$k};
1156         # copy data, so that we can modify later without side effects
1157         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1158     }
1159
1160     return $properties;
1161 }
1162
1163 sub delete_rule_properties {
1164     my ($rule, $delete_str) = @_;
1165
1166     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1167         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1168             if !defined($rule_properties->{$opt});
1169         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1170             if $opt eq 'type' || $opt eq 'action';
1171         delete $rule->{$opt};
1172     }
1173
1174     return $rule;
1175 }
1176
1177 my $apply_macro = sub {
1178     my ($macro_name, $param, $verify, $ipversion) = @_;
1179
1180     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1181     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1182
1183     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1184         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1185     }
1186
1187     # skip macros which are specific to another ipversion
1188     return if ($ipversion//0) != ($pve_fw_macro_ipversion->{$macro_name}//0);
1189
1190     my $rules = [];
1191
1192     foreach my $templ (@$macro_rules) {
1193         my $rule = {};
1194         my $param_used = {};
1195         foreach my $k (keys %$templ) {
1196             my $v = $templ->{$k};
1197             if ($v eq 'PARAM') {
1198                 $v = $param->{$k};
1199                 $param_used->{$k} = 1;
1200             } elsif ($v eq 'DEST') {
1201                 $v = $param->{dest};
1202                 $param_used->{dest} = 1;
1203             } elsif ($v eq 'SOURCE') {
1204                 $v = $param->{source};
1205                 $param_used->{source} = 1;
1206             }
1207
1208             if (!defined($v)) {
1209                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1210                 raise_param_exc({ macro => $msg }) if $verify;
1211                 die "$msg\n";
1212             }
1213             $rule->{$k} = $v;
1214         }
1215         foreach my $k (keys %$param) {
1216             next if $k eq 'macro';
1217             next if !defined($param->{$k});
1218             next if $param_used->{$k};
1219             if (defined($rule->{$k})) {
1220                 if ($rule->{$k} ne $param->{$k}) {
1221                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1222                     raise_param_exc({ $k => $msg }) if $verify;
1223                     die "$msg\n";
1224                 }
1225             } else {
1226                 $rule->{$k} = $param->{$k};
1227             }
1228         }
1229         push @$rules, $rule;
1230     }
1231
1232     return $rules;
1233 };
1234
1235 my $rule_env_iface_lookup = {
1236     'ct' => 1,
1237     'vm' => 1,
1238     'group' => 0,
1239     'cluster' => 1,
1240     'host' => 1,
1241 };
1242
1243 sub verify_rule {
1244     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1245
1246     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1247
1248     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1249     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1250
1251     my $errors = $rule->{errors} || {};
1252
1253     my $error_count = 0;
1254
1255     my $add_error = sub {
1256         my ($param, $msg)  = @_;
1257         chomp $msg;
1258         raise_param_exc({ $param => $msg }) if !$noerr;
1259         $error_count++;
1260         $errors->{$param} = $msg if !$errors->{$param};
1261     };
1262
1263     my $ipversion;
1264     my $set_ip_version = sub {
1265         my $vers = shift;
1266         if ($vers) {
1267             die "detected mixed ipv4/ipv6 adresses in rule\n"
1268                 if $ipversion && ($vers != $ipversion);
1269             $ipversion = $vers;
1270         }
1271     };
1272
1273     my $check_ipset_or_alias_property = sub {
1274         my ($name, $expected_ipversion) = @_;
1275
1276         if (my $value = $rule->{$name}) {
1277             if ($value =~ m/^\+/) {
1278                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1279                     &$add_error($name, "no such ipset '$1'")
1280                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1281
1282                 } else {
1283                     &$add_error($name, "invalid ipset name '$value'");
1284                 }
1285             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1286                 my $alias = lc($value);
1287                 &$add_error($name, "no such alias '$value'")
1288                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1289                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1290                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1291
1292                 &$set_ip_version($e->{ipversion});
1293             }
1294         }
1295     };
1296
1297     my $type = $rule->{type};
1298     my $action = $rule->{action};
1299
1300     &$add_error('type', "missing property") if !$type;
1301     &$add_error('action', "missing property") if !$action;
1302
1303     if ($type) {
1304         if ($type eq  'in' || $type eq 'out') {
1305             &$add_error('action', "unknown action '$action'")
1306                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1307         } elsif ($type eq 'group') {
1308             &$add_error('type', "security groups not allowed")
1309                 if !$allow_groups;
1310             &$add_error('action', "invalid characters in security group name")
1311                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1312         } else {
1313             &$add_error('type', "unknown rule type '$type'");
1314         }
1315     }
1316
1317     if ($rule->{iface}) {
1318         &$add_error('type', "parameter -i not allowed for this rule type")
1319             if !$allow_iface;
1320         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1321         &$add_error('iface', $@) if $@;
1322         if ($rule_env eq 'vm') {
1323             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1324                 if $rule->{iface} !~  m/^net(\d+)$/;
1325         } elsif ($rule_env eq 'ct') {
1326             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1327                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1328         }
1329     }
1330
1331     if ($rule->{macro}) {
1332         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1333             $rule->{macro} = $preferred_name;
1334         } else {
1335             &$add_error('macro', "unknown macro '$rule->{macro}'");
1336         }
1337     }
1338
1339     if ($rule->{proto}) {
1340         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1341         &$add_error('proto', $@) if $@;
1342         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1343         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1344     }
1345
1346     if ($rule->{dport}) {
1347         eval { parse_port_name_number_or_range($rule->{dport}); };
1348         &$add_error('dport', $@) if $@;
1349         &$add_error('proto', "missing property - 'dport' requires this property")
1350             if !$rule->{proto};
1351     }
1352
1353     if ($rule->{sport}) {
1354         eval { parse_port_name_number_or_range($rule->{sport}); };
1355         &$add_error('sport', $@) if $@;
1356         &$add_error('proto', "missing property - 'sport' requires this property")
1357             if !$rule->{proto};
1358     }
1359
1360     if ($rule->{source}) {
1361         eval {
1362             my $source_ipversion = parse_address_list($rule->{source});
1363             &$set_ip_version($source_ipversion);
1364         };
1365         &$add_error('source', $@) if $@;
1366         &$check_ipset_or_alias_property('source', $ipversion);
1367     }
1368
1369     if ($rule->{dest}) {
1370         eval {
1371             my $dest_ipversion = parse_address_list($rule->{dest});
1372             &$set_ip_version($dest_ipversion);
1373         };
1374         &$add_error('dest', $@) if $@;
1375         &$check_ipset_or_alias_property('dest', $ipversion);
1376     }
1377
1378     $rule->{ipversion} = $ipversion if $ipversion;
1379
1380     if ($rule->{macro} && !$error_count) {
1381         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1382         if (my $err = $@) {
1383             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1384                 my $eh = $err->{errors};
1385                 foreach my $p (keys %$eh) {
1386                     &$add_error($p, $eh->{$p});
1387                 }
1388             } else {
1389                 &$add_error('macro', "$err");
1390             }
1391         }
1392     }
1393
1394     $rule->{errors} = $errors if $error_count;
1395
1396     return $rule;
1397 }
1398
1399 sub copy_rule_data {
1400     my ($rule, $param) = @_;
1401
1402     foreach my $k (keys %$rule_properties) {
1403         if (defined(my $v = $param->{$k})) {
1404             if ($v eq '' || $v eq '-') {
1405                 delete $rule->{$k};
1406             } else {
1407                 $rule->{$k} = $v;
1408             }
1409         }
1410     }
1411
1412     return $rule;
1413 }
1414
1415 sub rules_modify_permissions {
1416     my ($rule_env) = @_;
1417
1418     if ($rule_env eq 'host') {
1419         return {
1420             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1421         };
1422     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1423         return {
1424             check => ['perm', '/', [ 'Sys.Modify' ]],
1425         };
1426     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1427         return {
1428             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1429         }
1430     }
1431
1432     return undef;
1433 }
1434
1435 sub rules_audit_permissions {
1436     my ($rule_env) = @_;
1437
1438     if ($rule_env eq 'host') {
1439         return {
1440             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1441         };
1442     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1443         return {
1444             check => ['perm', '/', [ 'Sys.Audit' ]],
1445         };
1446     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1447         return {
1448             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1449         }
1450     }
1451
1452     return undef;
1453 }
1454
1455 # core functions
1456 my $bridge_firewall_enabled = 0;
1457
1458 sub enable_bridge_firewall {
1459
1460     return if $bridge_firewall_enabled; # only once
1461
1462     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1463     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1464
1465     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1466     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1467
1468     $bridge_firewall_enabled = 1;
1469 }
1470
1471 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1472
1473 sub iptables_restore_cmdlist {
1474     my ($cmdlist) = @_;
1475
1476     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1477 }
1478
1479 sub ip6tables_restore_cmdlist {
1480     my ($cmdlist) = @_;
1481
1482     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1483 }
1484
1485 sub ipset_restore_cmdlist {
1486     my ($cmdlist) = @_;
1487
1488     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1489 }
1490
1491 sub iptables_get_chains {
1492     my ($iptablescmd) = @_;
1493
1494     $iptablescmd = "iptables" if !$iptablescmd;
1495
1496     my $res = {};
1497
1498     # check what chains we want to track
1499     my $is_pvefw_chain = sub {
1500         my $name = shift;
1501
1502         return 1 if $name =~ m/^PVEFW-\S+$/;
1503
1504         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1505
1506         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1507
1508         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1509
1510         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1511         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1512
1513         return undef;
1514     };
1515
1516     my $table = '';
1517
1518     my $hooks = {};
1519
1520     my $parser = sub {
1521         my $line = shift;
1522
1523         return if $line =~ m/^#/;
1524         return if $line =~ m/^\s*$/;
1525
1526         if ($line =~ m/^\*(\S+)$/) {
1527             $table = $1;
1528             return;
1529         }
1530
1531         return if $table ne 'filter';
1532
1533         if ($line =~ m/^:(\S+)\s/) {
1534             my $chain = $1;
1535             return if !&$is_pvefw_chain($chain);
1536             $res->{$chain} = "unknown";
1537         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1538             my ($chain, $sig) = ($1, $2);
1539             return if !&$is_pvefw_chain($chain);
1540             $res->{$chain} = $sig;
1541         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1542             $hooks->{$1} = 1;
1543         } else {
1544             # simply ignore the rest
1545             return;
1546         }
1547     };
1548
1549     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1550
1551     return wantarray ? ($res, $hooks) : $res;
1552 }
1553
1554 sub iptables_chain_digest {
1555     my ($rules) = @_;
1556     my $digest = Digest::SHA->new('sha1');
1557     foreach my $rule (@$rules) { # order is important
1558         $digest->add($rule);
1559     }
1560     return $digest->b64digest;
1561 }
1562
1563 sub ipset_chain_digest {
1564     my ($rules) = @_;
1565
1566     my $digest = Digest::SHA->new('sha1');
1567     foreach my $rule (sort @$rules) { # note: sorted
1568         $digest->add($rule);
1569     }
1570     return $digest->b64digest;
1571 }
1572
1573 sub ipset_get_chains {
1574
1575     my $res = {};
1576     my $chains = {};
1577
1578     my $parser = sub {
1579         my $line = shift;
1580
1581         return if $line =~ m/^#/;
1582         return if $line =~ m/^\s*$/;
1583         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1584             my $chain = $1;
1585             $line =~ s/\s+$//; # delete trailing white space
1586             push @{$chains->{$chain}}, $line;
1587         } else {
1588             # simply ignore the rest
1589             return;
1590         }
1591     };
1592
1593     run_command("/sbin/ipset save", outfunc => $parser);
1594
1595     # compute digest for each chain
1596     foreach my $chain (keys %$chains) {
1597         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1598     }
1599
1600     return $res;
1601 }
1602
1603 sub ruleset_generate_cmdstr {
1604     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1605
1606     return if defined($rule->{enable}) && !$rule->{enable};
1607     return if $rule->{errors};
1608
1609     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1610
1611     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1612     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1613
1614     my @cmd = ();
1615
1616     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1617     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1618
1619     my $source = $rule->{source};
1620     my $dest = $rule->{dest};
1621
1622     if ($source) {
1623         if ($source =~ m/^\+/) {
1624             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1625                 my $name = $1;
1626                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1627                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1628                     push @cmd, "-m set --match-set ${ipset_chain} src";
1629                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1630                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1631                     push @cmd, "-m set --match-set ${ipset_chain} src";
1632                 } else {
1633                     die "no such ipset '$name'\n";
1634                 }
1635             } else {
1636                 die "invalid security group name '$source'\n";
1637             }
1638         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1639             my $alias = lc($source);
1640             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1641             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1642             die "no such alias '$source'\n" if !$e;
1643             push @cmd, "-s $e->{cidr}";
1644         } elsif ($source =~ m/\-/){
1645             push @cmd, "-m iprange --src-range $source";
1646         } else {
1647             push @cmd, "-s $source";
1648         }
1649     }
1650
1651     if ($dest) {
1652         if ($dest =~ m/^\+/) {
1653             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1654                 my $name = $1;
1655                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1656                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1657                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1658                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1659                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1660                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1661                 } else {
1662                     die "no such ipset '$name'\n";
1663                 }
1664             } else {
1665                 die "invalid security group name '$dest'\n";
1666             }
1667         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1668             my $alias = lc($dest);
1669             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1670             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1671             die "no such alias '$dest'\n" if !$e;
1672             push @cmd, "-d $e->{cidr}";
1673         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1674             push @cmd, "-m iprange --dst-range $dest";
1675         } else {
1676             push @cmd, "-d $dest";
1677         }
1678     }
1679
1680     if ($rule->{proto}) {
1681         push @cmd, "-p $rule->{proto}";
1682
1683         my $multiport = 0;
1684         $multiport++ if $nbdport > 1;
1685         $multiport++ if $nbsport > 1;
1686
1687         push @cmd, "--match multiport" if $multiport;
1688
1689         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1690             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1691
1692         if ($rule->{dport}) {
1693             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1694                 # Note: we use dport to store --icmp-type
1695                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1696                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1697             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1698                 # Note: we use dport to store --icmpv6-type
1699                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1700                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1701             } else {
1702                 if ($nbdport > 1) {
1703                     if ($multiport == 2) {
1704                         push @cmd,  "--ports $rule->{dport}";
1705                     } else {
1706                         push @cmd, "--dports $rule->{dport}";
1707                     }
1708                 } else {
1709                     push @cmd, "--dport $rule->{dport}";
1710                 }
1711             }
1712         }
1713
1714         if ($rule->{sport}) {
1715             if ($nbsport > 1) {
1716                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1717             } else {
1718                 push @cmd, "--sport $rule->{sport}";
1719             }
1720         }
1721     } elsif ($rule->{dport} || $rule->{sport}) {
1722         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1723         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1724     }
1725
1726     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1727
1728     if (my $action = $rule->{action}) {
1729         $action = $actions->{$action} if defined($actions->{$action});
1730         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1731         push @cmd, $goto ? "-g $action" : "-j $action";
1732     }
1733
1734     return scalar(@cmd) ? join(' ', @cmd) : undef;
1735 }
1736
1737 sub ruleset_generate_rule {
1738     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1739
1740     my $rules;
1741
1742     if ($rule->{macro}) {
1743         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1744     } else {
1745         $rules = [ $rule ];
1746     }
1747
1748     # update all or nothing
1749
1750     my @cmds = ();
1751     foreach my $tmp (@$rules) {
1752         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1753             push @cmds, $cmdstr;
1754         }
1755     }
1756
1757     foreach my $cmdstr (@cmds) {
1758         ruleset_addrule($ruleset, $chain, $cmdstr);
1759     }
1760 }
1761
1762 sub ruleset_generate_rule_insert {
1763     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1764
1765     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1766
1767     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1768         ruleset_insertrule($ruleset, $chain, $cmdstr);
1769     }
1770 }
1771
1772 sub ruleset_create_chain {
1773     my ($ruleset, $chain) = @_;
1774
1775     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1776     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1777
1778     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1779
1780     $ruleset->{$chain} = [];
1781 }
1782
1783 sub ruleset_chain_exist {
1784     my ($ruleset, $chain) = @_;
1785
1786     return $ruleset->{$chain} ? 1 : undef;
1787 }
1788
1789 sub ruleset_addrule {
1790    my ($ruleset, $chain, $rule) = @_;
1791
1792    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1793
1794    push @{$ruleset->{$chain}}, "-A $chain $rule";
1795 }
1796
1797 sub ruleset_insertrule {
1798    my ($ruleset, $chain, $rule) = @_;
1799
1800    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1801
1802    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1803 }
1804
1805 sub get_log_rule_base {
1806     my ($chain, $vmid, $msg, $loglevel) = @_;
1807
1808     die "internal error - no log level" if !defined($loglevel);
1809
1810     $vmid = 0 if !defined($vmid);
1811
1812     # Note: we use special format for prefix to pass further
1813     # info to log daemon (VMID, LOGVELEL and CHAIN)
1814
1815     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1816 }
1817
1818 sub ruleset_addlog {
1819     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1820
1821     return if !defined($loglevel);
1822
1823     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1824
1825     $logrule = "$rule $logrule" if defined($rule);
1826
1827     ruleset_addrule($ruleset, $chain, $logrule);
1828 }
1829
1830 sub ruleset_add_chain_policy {
1831     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1832
1833     if ($policy eq 'ACCEPT') {
1834
1835         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1836                               { ACCEPT =>  $accept_action});
1837
1838     } elsif ($policy eq 'DROP') {
1839
1840         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1841
1842         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1843
1844         ruleset_addrule($ruleset, $chain, "-j DROP");
1845     } elsif ($policy eq 'REJECT') {
1846         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1847
1848         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1849
1850         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1851     } else {
1852         # should not happen
1853         die "internal error: unknown policy '$policy'";
1854     }
1855 }
1856
1857 sub ruleset_chain_add_conn_filters {
1858     my ($ruleset, $chain, $accept) = @_;
1859
1860     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1861     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1862 }
1863
1864 sub ruleset_chain_add_input_filters {
1865     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1866
1867     if ($cluster_conf->{ipset}->{blacklist}){
1868         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1869             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1870             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1871             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1872         }
1873         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1874         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1875     }
1876
1877     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1878         if ($ipversion == 4) {
1879             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1880         }
1881     }
1882
1883     if ($options->{tcpflags}) {
1884         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1885     }
1886 }
1887
1888 sub ruleset_create_vm_chain {
1889     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1890
1891     ruleset_create_chain($ruleset, $chain);
1892     my $accept = generate_nfqueue($options);
1893
1894     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1895         if ($direction eq 'OUT') {
1896             ruleset_generate_rule($ruleset, $chain, $ipversion,
1897                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1898                                     proto => 'udp', sport => 68, dport => 67 });
1899         } else {
1900             ruleset_generate_rule($ruleset, $chain, $ipversion,
1901                                   { action => 'ACCEPT',
1902                                     proto => 'udp', sport => 67, dport => 68 });
1903         }
1904     }
1905
1906     if ($direction eq 'OUT') {
1907         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1908             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1909         }
1910         if ($ipfilter_ipset) {
1911             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1912         }
1913         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1914     }
1915 }
1916
1917 sub ruleset_add_group_rule {
1918     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1919
1920     my $group = $rule->{action};
1921     my $group_chain = "GROUP-$group-$direction";
1922     if(!ruleset_chain_exist($ruleset, $group_chain)){
1923         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1924     }
1925
1926     if ($direction eq 'OUT' && $rule->{iface_out}) {
1927         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1928     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1929         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1930     } else {
1931         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1932     }
1933
1934     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1935 }
1936
1937 sub ruleset_generate_vm_rules {
1938     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1939
1940     my $lc_direction = lc($direction);
1941
1942     my $in_accept = generate_nfqueue($options);
1943
1944     foreach my $rule (@$rules) {
1945         next if $rule->{iface} && $rule->{iface} ne $netid;
1946         next if !$rule->{enable} || $rule->{errors};
1947         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1948
1949         if ($rule->{type} eq 'group') {
1950             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1951                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1952         } else {
1953             next if $rule->{type} ne $lc_direction;
1954             eval {
1955                 if ($direction eq 'OUT') {
1956                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1957                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1958                                           undef, $cluster_conf, $vmfw_conf);
1959                 } else {
1960                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1961                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1962                                           undef, $cluster_conf, $vmfw_conf);
1963                 }
1964             };
1965             warn $@ if $@;
1966         }
1967     }
1968 }
1969
1970 sub generate_nfqueue {
1971     my ($options) = @_;
1972
1973     if ($options->{ips}) {
1974         my $action = "NFQUEUE";
1975         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1976             if (defined($3) && defined($1)) {
1977                 $action .= " --queue-balance $1:$3";
1978             } elsif (defined($1)) {
1979                 $action .= " --queue-num $1";
1980             }
1981         }
1982         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1983         return $action;
1984     } else {
1985         return "ACCEPT";
1986     }
1987 }
1988
1989 sub ruleset_generate_vm_ipsrules {
1990     my ($ruleset, $options, $direction, $iface) = @_;
1991
1992     if ($options->{ips} && $direction eq 'IN') {
1993         my $nfqueue = generate_nfqueue($options);
1994
1995         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1996             ruleset_create_chain($ruleset, "PVEFW-IPS");
1997         }
1998
1999         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2000     }
2001 }
2002
2003 sub generate_venet_rules_direction {
2004     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2005
2006     my $lc_direction = lc($direction);
2007
2008     my $rules = $vmfw_conf->{rules};
2009
2010     my $options = $vmfw_conf->{options};
2011     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2012
2013     my $chain = "venet0-$vmid-$direction";
2014
2015     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2016
2017     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2018
2019     # implement policy
2020     my $policy;
2021
2022     if ($direction eq 'OUT') {
2023         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2024     } else {
2025         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2026     }
2027
2028     my $accept = generate_nfqueue($options);
2029     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2030     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2031
2032     if ($direction eq 'OUT') {
2033         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2034             action => $chain,
2035             source => $ip,
2036             iface_in => 'venet0'});
2037     } else {
2038         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2039             action => $chain,
2040             dest => $ip,
2041             iface_out => 'venet0'});
2042     }
2043 }
2044
2045 sub generate_tap_rules_direction {
2046     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2047
2048     my $lc_direction = lc($direction);
2049
2050     my $rules = $vmfw_conf->{rules};
2051
2052     my $options = $vmfw_conf->{options};
2053     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2054
2055     my $tapchain = "$iface-$direction";
2056
2057     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2058     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2059         if $vmfw_conf->{ipset}->{$ipfilter_name};
2060
2061     # create chain with mac and ip filter
2062     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2063
2064     if ($options->{enable}) {
2065         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2066
2067         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2068
2069         # implement policy
2070         my $policy;
2071
2072         if ($direction eq 'OUT') {
2073             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2074         } else {
2075         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2076         }
2077
2078         my $accept = generate_nfqueue($options);
2079         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2080         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2081     } else {
2082         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2083         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2084     }
2085
2086     # plug the tap chain to bridge chain
2087     if ($direction eq 'IN') {
2088         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2089                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2090     } else {
2091         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2092                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2093     }
2094 }
2095
2096 sub enable_host_firewall {
2097     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2098
2099     my $options = $hostfw_conf->{options};
2100     my $cluster_options = $cluster_conf->{options};
2101     my $rules = $hostfw_conf->{rules};
2102     my $cluster_rules = $cluster_conf->{rules};
2103
2104     # host inbound firewall
2105     my $chain = "PVEFW-HOST-IN";
2106     ruleset_create_chain($ruleset, $chain);
2107
2108     my $loglevel = get_option_log_level($options, "log_level_in");
2109
2110     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2111
2112     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2113     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2114
2115     # we use RETURN because we need to check also tap rules
2116     my $accept_action = 'RETURN';
2117
2118     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2119
2120     # add host rules first, so that cluster wide rules can be overwritten
2121     foreach my $rule (@$rules, @$cluster_rules) {
2122         next if !$rule->{enable} || $rule->{errors};
2123         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2124
2125         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2126
2127         eval {
2128             if ($rule->{type} eq 'group') {
2129                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2130             } elsif ($rule->{type} eq 'in') {
2131                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2132                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2133                                       undef, $cluster_conf, $hostfw_conf);
2134             }
2135         };
2136         warn $@ if $@;
2137         delete $rule->{iface_in};
2138     }
2139
2140     # allow standard traffic for management ipset (includes cluster network)
2141     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2142     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2143     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2144     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2145     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2146     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2147
2148     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2149     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2150
2151     # corosync
2152     if ($localnet && ($ipversion == $localnet_ver)) {
2153         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2154         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2155         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2156     }
2157
2158     # implement input policy
2159     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2160     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2161
2162     # host outbound firewall
2163     $chain = "PVEFW-HOST-OUT";
2164     ruleset_create_chain($ruleset, $chain);
2165
2166     $loglevel = get_option_log_level($options, "log_level_out");
2167
2168     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2169
2170     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2171
2172     # we use RETURN because we may want to check other thigs later
2173     $accept_action = 'RETURN';
2174
2175     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2176
2177     # add host rules first, so that cluster wide rules can be overwritten
2178     foreach my $rule (@$rules, @$cluster_rules) {
2179         next if !$rule->{enable} || $rule->{errors};
2180         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2181
2182         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2183         eval {
2184             if ($rule->{type} eq 'group') {
2185                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2186             } elsif ($rule->{type} eq 'out') {
2187                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2188                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2189                                       undef, $cluster_conf, $hostfw_conf);
2190             }
2191         };
2192         warn $@ if $@;
2193         delete $rule->{iface_out};
2194     }
2195
2196     # allow standard traffic on cluster network
2197     if ($localnet && ($ipversion == $localnet_ver)) {
2198         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2199         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2200         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2201         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2202
2203         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2204         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2205         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2206     }
2207
2208     # implement output policy
2209     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2210     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2211
2212     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2213     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2214 }
2215
2216 sub generate_group_rules {
2217     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2218
2219     my $rules = $cluster_conf->{groups}->{$group};
2220
2221     if (!$rules) {
2222         warn "no such security group '$group'\n";
2223         $rules = []; # create empty chain
2224     }
2225
2226     my $chain = "GROUP-${group}-IN";
2227
2228     ruleset_create_chain($ruleset, $chain);
2229     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2230
2231     foreach my $rule (@$rules) {
2232         next if $rule->{type} ne 'in';
2233         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2234         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2235                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2236                               undef, $cluster_conf);
2237     }
2238
2239     $chain = "GROUP-${group}-OUT";
2240
2241     ruleset_create_chain($ruleset, $chain);
2242     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2243
2244     foreach my $rule (@$rules) {
2245         next if $rule->{type} ne 'out';
2246         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2247         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2248         # check also other tap rules later
2249         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2250                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2251                               undef, $cluster_conf);
2252     }
2253 }
2254
2255 my $MAX_NETS = 32;
2256 my $valid_netdev_names = {};
2257 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2258     $valid_netdev_names->{"net$i"} = 1;
2259 }
2260
2261 sub parse_fw_rule {
2262     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2263
2264     my $orig_line = $line;
2265
2266     my $rule = {};
2267
2268     # we can add single line comments to the end of the rule
2269     if ($line =~ s/#\s*(.*?)\s*$//) {
2270         $rule->{comment} = decode('utf8', $1);
2271     }
2272
2273     # we can disable a rule when prefixed with '|'
2274
2275     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2276
2277     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2278         die "unable to parse rule: $line\n";
2279
2280     $rule->{type} = lc($1);
2281     $rule->{action} = $2;
2282
2283     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2284         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2285             $rule->{macro} = $1;
2286             $rule->{action} = $2;
2287         }
2288     }
2289
2290     while (length($line)) {
2291         if ($line =~ s/^-i (\S+)\s*//) {
2292             $rule->{iface} = $1;
2293             next;
2294         }
2295
2296         last if $rule->{type} eq 'group';
2297
2298         if ($line =~ s/^-p (\S+)\s*//) {
2299             $rule->{proto} = $1;
2300             next;
2301         }
2302
2303         if ($line =~ s/^-dport (\S+)\s*//) {
2304             $rule->{dport} = $1;
2305             next;
2306         }
2307
2308         if ($line =~ s/^-sport (\S+)\s*//) {
2309             $rule->{sport} = $1;
2310             next;
2311         }
2312         if ($line =~ s/^-source (\S+)\s*//) {
2313             $rule->{source} = $1;
2314             next;
2315         }
2316         if ($line =~ s/^-dest (\S+)\s*//) {
2317             $rule->{dest} = $1;
2318             next;
2319         }
2320
2321         last;
2322     }
2323
2324     die "unable to parse rule parameters: $line\n" if length($line);
2325
2326     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2327     if ($verbose && $rule->{errors}) {
2328         warn "$prefix - errors in rule parameters: $orig_line\n";
2329         foreach my $p (keys %{$rule->{errors}}) {
2330             warn "  $p: $rule->{errors}->{$p}\n";
2331         }
2332     }
2333
2334     return $rule;
2335 }
2336
2337 sub parse_vmfw_option {
2338     my ($line) = @_;
2339
2340     my ($opt, $value);
2341
2342     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2343
2344     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2345         $opt = lc($1);
2346         $value = int($2);
2347     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2348         $opt = lc($1);
2349         $value = $2 ? lc($3) : '';
2350     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2351         $opt = lc($1);
2352         $value = uc($3);
2353     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2354         $opt = lc($1);
2355         $value = $2;
2356     } else {
2357         die "can't parse option '$line'\n"
2358     }
2359
2360     return ($opt, $value);
2361 }
2362
2363 sub parse_hostfw_option {
2364     my ($line) = @_;
2365
2366     my ($opt, $value);
2367
2368     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2369
2370     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2371         $opt = lc($1);
2372         $value = int($2);
2373     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2374         $opt = lc($1);
2375         $value = $2 ? lc($3) : '';
2376     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2377         $opt = lc($1);
2378         $value = int($2);
2379     } else {
2380         die "can't parse option '$line'\n"
2381     }
2382
2383     return ($opt, $value);
2384 }
2385
2386 sub parse_clusterfw_option {
2387     my ($line) = @_;
2388
2389     my ($opt, $value);
2390
2391     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2392         $opt = lc($1);
2393         $value = int($2);
2394         if (($value > 1) && ((time() - $value) > 60)) {
2395             $value = 0
2396         }
2397     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2398         $opt = lc($1);
2399         $value = uc($3);
2400     } else {
2401         die "can't parse option '$line'\n"
2402     }
2403
2404     return ($opt, $value);
2405 }
2406
2407 sub resolve_alias {
2408     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2409
2410     my $alias = lc($cidr);
2411     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2412     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2413
2414     die "no such alias '$cidr'\n" if !$e;;
2415
2416     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2417 }
2418
2419 sub parse_ip_or_cidr {
2420     my ($cidr) = @_;
2421
2422     my $ipversion;
2423
2424     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2425         $cidr =~ s|/128$||;
2426         $ipversion = 6;
2427     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2428         $cidr =~ s|/32$||;
2429         $ipversion = 4;
2430     } else {
2431         die "value does not look like a valid IP address or CIDR network\n";
2432     }
2433
2434     return wantarray ? ($cidr, $ipversion) : $cidr;
2435 }
2436
2437 sub parse_alias {
2438     my ($line) = @_;
2439
2440     # we can add single line comments to the end of the line
2441     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2442
2443     if ($line =~ m/^(\S+)\s(\S+)$/) {
2444         my ($name, $cidr) = ($1, $2);
2445         my $ipversion;
2446
2447         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2448
2449         my $data = {
2450             name => $name,
2451             cidr => $cidr,
2452             ipversion => $ipversion,
2453         };
2454         $data->{comment} = $comment  if $comment;
2455         return $data;
2456     }
2457
2458     return undef;
2459 }
2460
2461 sub generic_fw_config_parser {
2462     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2463
2464     my $section;
2465     my $group;
2466
2467     my $res = $empty_conf;
2468
2469     while (defined(my $line = <$fh>)) {
2470         next if $line =~ m/^#/;
2471         next if $line =~ m/^\s*$/;
2472
2473         chomp $line;
2474
2475         my $linenr = $fh->input_line_number();
2476         my $prefix = "$filename (line $linenr)";
2477
2478         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2479             $section = 'options';
2480             next;
2481         }
2482
2483         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2484             $section = 'aliases';
2485             next;
2486         }
2487
2488         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2489             $section = 'groups';
2490             $group = lc($1);
2491             my $comment = $2;
2492             eval {
2493                 die "security group name too long\n" if length($group) > $max_group_name_length;
2494                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2495             };
2496             if (my $err = $@) {
2497                 ($section, $group, $comment) = undef;
2498                 warn "$prefix: $err";
2499                 next;
2500             }
2501
2502             $res->{$section}->{$group} = [];
2503             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2504                 if $comment;
2505             next;
2506         }
2507
2508         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2509             $section = 'rules';
2510             next;
2511         }
2512
2513         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2514             $section = 'ipset';
2515             $group = lc($1);
2516             my $comment = $2;
2517             eval {
2518                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2519                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2520             };
2521             if (my $err = $@) {
2522                 ($section, $group, $comment) = undef;
2523                 warn "$prefix: $err";
2524                 next;
2525             }
2526
2527             $res->{$section}->{$group} = [];
2528             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2529                 if $comment;
2530             next;
2531         }
2532
2533         if (!$section) {
2534             warn "$prefix: skip line - no section\n";
2535             next;
2536         }
2537
2538         if ($section eq 'options') {
2539             eval {
2540                 my ($opt, $value);
2541                 if ($rule_env eq 'cluster') {
2542                     ($opt, $value) = parse_clusterfw_option($line);
2543                 } elsif ($rule_env eq 'host') {
2544                     ($opt, $value) = parse_hostfw_option($line);
2545                 } else {
2546                     ($opt, $value) = parse_vmfw_option($line);
2547                 }
2548                 $res->{options}->{$opt} = $value;
2549             };
2550             warn "$prefix: $@" if $@;
2551         } elsif ($section eq 'aliases') {
2552             eval {
2553                 my $data = parse_alias($line);
2554                 $res->{aliases}->{lc($data->{name})} = $data;
2555             };
2556             warn "$prefix: $@" if $@;
2557         } elsif ($section eq 'rules') {
2558             my $rule;
2559             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2560             if (my $err = $@) {
2561                 warn "$prefix: $err";
2562                 next;
2563             }
2564             push @{$res->{$section}}, $rule;
2565         } elsif ($section eq 'groups') {
2566             my $rule;
2567             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2568             if (my $err = $@) {
2569                 warn "$prefix: $err";
2570                 next;
2571             }
2572             push @{$res->{$section}->{$group}}, $rule;
2573         } elsif ($section eq 'ipset') {
2574             # we can add single line comments to the end of the rule
2575             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2576
2577             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2578             my $nomatch = $1;
2579             my $cidr = $2;
2580             my $errors;
2581
2582             if ($nomatch && !$feature_ipset_nomatch) {
2583                 $errors->{nomatch} = "nomatch not supported by kernel";
2584             }
2585
2586             eval {
2587                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2588                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2589                 } else {
2590                     $cidr = parse_ip_or_cidr($cidr);
2591                 }
2592             };
2593             if (my $err = $@) {
2594                 chomp $err;
2595                 $errors->{cidr} = $err;
2596             }
2597
2598             my $entry = { cidr => $cidr };
2599             $entry->{nomatch} = 1 if $nomatch;
2600             $entry->{comment} = $comment if $comment;
2601             $entry->{errors} =  $errors if $errors;
2602
2603             if ($verbose && $errors) {
2604                 warn "$prefix - errors in ipset '$group': $line\n";
2605                 foreach my $p (keys %{$errors}) {
2606                     warn "  $p: $errors->{$p}\n";
2607                 }
2608             }
2609
2610             push @{$res->{$section}->{$group}}, $entry;
2611         } else {
2612             warn "$prefix: skip line - unknown section\n";
2613             next;
2614         }
2615     }
2616
2617     return $res;
2618 }
2619
2620 sub parse_hostfw_config {
2621     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2622
2623     my $empty_conf = { rules => [], options => {}};
2624
2625     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2626 }
2627
2628 sub parse_vmfw_config {
2629     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2630
2631     my $empty_conf = {
2632         rules => [],
2633         options => {},
2634         aliases => {},
2635         ipset => {} ,
2636         ipset_comments => {},
2637     };
2638
2639     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2640 }
2641
2642 sub parse_clusterfw_config {
2643     my ($filename, $fh, $verbose) = @_;
2644
2645     my $section;
2646     my $group;
2647
2648     my $empty_conf = {
2649         rules => [],
2650         options => {},
2651         aliases => {},
2652         groups => {},
2653         group_comments => {},
2654         ipset => {} ,
2655         ipset_comments => {},
2656     };
2657
2658     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2659 }
2660
2661 sub run_locked {
2662     my ($code, @param) = @_;
2663
2664     my $timeout = 10;
2665
2666     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2667
2668     die $@ if $@;
2669
2670     return $res;
2671 }
2672
2673 sub read_local_vm_config {
2674
2675     my $openvz = {};
2676     my $qemu = {};
2677
2678     my $vmdata = { openvz => $openvz, qemu => $qemu };
2679
2680     my $vmlist = PVE::Cluster::get_vmlist();
2681     return $vmdata if !$vmlist || !$vmlist->{ids};
2682     my $ids = $vmlist->{ids};
2683
2684     foreach my $vmid (keys %$ids) {
2685         next if !$vmid; # skip VE0
2686         my $d = $ids->{$vmid};
2687         next if !$d->{node} || $d->{node} ne $nodename;
2688         next if !$d->{type};
2689         if ($d->{type} eq 'openvz') {
2690             if ($have_pve_manager) {
2691                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2692                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2693                     $openvz->{$vmid} = $conf;
2694                 }
2695             }
2696         } elsif ($d->{type} eq 'qemu') {
2697             if ($have_qemu_server) {
2698                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2699                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2700                     $qemu->{$vmid} = $conf;
2701                 }
2702             }
2703         }
2704     }
2705
2706     return $vmdata;
2707 };
2708
2709 sub load_vmfw_conf {
2710     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2711
2712     my $vmfw_conf = {};
2713
2714     $dir = $pvefw_conf_dir if !defined($dir);
2715
2716     my $filename = "$dir/$vmid.fw";
2717     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2718         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2719         $vmfw_conf->{vmid} = $vmid;
2720     }
2721
2722     return $vmfw_conf;
2723 }
2724
2725 my $format_rules = sub {
2726     my ($rules, $allow_iface) = @_;
2727
2728     my $raw = '';
2729
2730     foreach my $rule (@$rules) {
2731         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2732             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2733             $raw .= uc($rule->{type});
2734             if ($rule->{macro}) {
2735                 $raw .= " $rule->{macro}($rule->{action})";
2736             } else {
2737                 $raw .= " " . $rule->{action};
2738             }
2739             if ($allow_iface && $rule->{iface}) {
2740                 $raw .= " -i $rule->{iface}";
2741             }
2742
2743             if ($rule->{type} ne  'group')  {
2744                 $raw .= " -source $rule->{source}" if $rule->{source};
2745                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2746                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2747                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2748                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2749             }
2750
2751             $raw .= " # " . encode('utf8', $rule->{comment})
2752                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2753             $raw .= "\n";
2754         } else {
2755             die "unknown rule type '$rule->{type}'";
2756         }
2757     }
2758
2759     return $raw;
2760 };
2761
2762 my $format_options = sub {
2763     my ($options) = @_;
2764
2765     my $raw = '';
2766
2767     $raw .= "[OPTIONS]\n\n";
2768     foreach my $opt (keys %$options) {
2769         $raw .= "$opt: $options->{$opt}\n";
2770     }
2771     $raw .= "\n";
2772
2773     return $raw;
2774 };
2775
2776 my $format_aliases = sub {
2777     my ($aliases) = @_;
2778
2779     my $raw = '';
2780
2781     $raw .= "[ALIASES]\n\n";
2782     foreach my $k (keys %$aliases) {
2783         my $e = $aliases->{$k};
2784         $raw .= "$e->{name} $e->{cidr}";
2785         $raw .= " # " . encode('utf8', $e->{comment})
2786             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2787         $raw .= "\n";
2788     }
2789     $raw .= "\n";
2790
2791     return $raw;
2792 };
2793
2794 my $format_ipsets = sub {
2795     my ($fw_conf) = @_;
2796
2797     my $raw = '';
2798
2799     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2800         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2801             my $utf8comment = encode('utf8', $comment);
2802             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2803         } else {
2804             $raw .= "[IPSET $ipset]\n\n";
2805         }
2806         my $options = $fw_conf->{ipset}->{$ipset};
2807
2808         my $nethash = {};
2809         foreach my $entry (@$options) {
2810             $nethash->{$entry->{cidr}} = $entry;
2811         }
2812
2813         foreach my $cidr (sort keys %$nethash) {
2814             my $entry = $nethash->{$cidr};
2815             my $line = $entry->{nomatch} ? '!' : '';
2816             $line .= $entry->{cidr};
2817             $line .= " # " . encode('utf8', $entry->{comment})
2818                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2819             $raw .= "$line\n";
2820         }
2821
2822         $raw .= "\n";
2823     }
2824
2825     return $raw;
2826 };
2827
2828 sub save_vmfw_conf {
2829     my ($vmid, $vmfw_conf) = @_;
2830
2831     my $raw = '';
2832
2833     my $options = $vmfw_conf->{options};
2834     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2835
2836     my $aliases = $vmfw_conf->{aliases};
2837     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2838
2839     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2840
2841     my $rules = $vmfw_conf->{rules} || [];
2842     if ($rules && scalar(@$rules)) {
2843         $raw .= "[RULES]\n\n";
2844         $raw .= &$format_rules($rules, 1);
2845         $raw .= "\n";
2846     }
2847
2848     mkdir $pvefw_conf_dir;
2849
2850     my $filename = "$pvefw_conf_dir/$vmid.fw";
2851     PVE::Tools::file_set_contents($filename, $raw);
2852 }
2853
2854 sub read_vm_firewall_configs {
2855     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2856
2857     my $vmfw_configs = {};
2858
2859     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2860         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2861         next if !$vmfw_conf->{options}; # skip if file does not exists
2862         $vmfw_configs->{$vmid} = $vmfw_conf;
2863     }
2864     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2865         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2866         next if !$vmfw_conf->{options}; # skip if file does not exists
2867         $vmfw_configs->{$vmid} = $vmfw_conf;
2868     }
2869
2870     return $vmfw_configs;
2871 }
2872
2873 sub get_option_log_level {
2874     my ($options, $k) = @_;
2875
2876     my $v = $options->{$k};
2877     $v = $default_log_level if !defined($v);
2878
2879     return undef if $v eq '' || $v eq 'nolog';
2880
2881     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2882
2883     return $v if ($v >= 0) && ($v <= 7);
2884
2885     warn "unknown log level ($k = '$v')\n";
2886
2887     return undef;
2888 }
2889
2890 sub generate_std_chains {
2891     my ($ruleset, $options, $ipversion) = @_;
2892
2893     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2894
2895     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2896
2897     my $chain;
2898
2899     if ($ipversion == 4) {
2900         # same as shorewall smurflog.
2901         $chain = 'PVEFW-smurflog';
2902         $std_chains->{$chain} = [];
2903
2904         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2905         push @{$std_chains->{$chain}}, "-j DROP";
2906     }
2907
2908     # same as shorewall logflags action.
2909     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2910     $chain = 'PVEFW-logflags';
2911     $std_chains->{$chain} = [];
2912
2913     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2914     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2915     push @{$std_chains->{$chain}}, "-j DROP";
2916
2917     foreach my $chain (keys %$std_chains) {
2918         ruleset_create_chain($ruleset, $chain);
2919         foreach my $rule (@{$std_chains->{$chain}}) {
2920             if (ref($rule)) {
2921                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2922             } else {
2923                 ruleset_addrule($ruleset, $chain, $rule);
2924             }
2925         }
2926     }
2927 }
2928
2929 sub generate_ipset_chains {
2930     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2931
2932     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2933
2934         my $options = $fw_conf->{ipset}->{$ipset};
2935
2936         # remove duplicates
2937         my $nethash = {};
2938         foreach my $entry (@$options) {
2939             next if $entry->{errors}; # skip entries with errors
2940             eval {
2941                 my ($cidr, $ver);
2942                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2943                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2944                 } else {
2945                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2946                 }
2947                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2948                 if ($ver == 6) {
2949                     my $ipv6 = inet_pton(AF_INET6, lc($cidr));
2950                     $cidr = inet_ntop(AF_INET6, $ipv6);
2951                     $cidr =~ s|/128$||;
2952                 } else {
2953                     $cidr =~ s|/32$||;
2954                 }
2955
2956                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2957             };
2958             warn $@ if $@;
2959         }
2960
2961         foreach my $ipversion (4, 6) {
2962             my $data = $nethash->{$ipversion};
2963
2964             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2965
2966             my $hashsize = scalar(@$options);
2967             if ($hashsize <= 64) {
2968                 $hashsize = 64;
2969             } else {
2970                 $hashsize = round_powerof2($hashsize);
2971             }
2972
2973             my $family = $ipversion == "6" ? "inet6" : "inet";
2974
2975             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2976
2977             foreach my $cidr (sort keys %$data) {
2978                 my $entry = $data->{$cidr};
2979
2980                 my $cmd = "add $name $cidr";
2981                 if ($entry->{nomatch}) {
2982                     if ($feature_ipset_nomatch) {
2983                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2984                     } else {
2985                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2986                     }
2987                 } else {
2988                     push @{$ipset_ruleset->{$name}}, $cmd;
2989                 }
2990             }
2991         }
2992     }
2993 }
2994
2995 sub round_powerof2 {
2996     my ($int) = @_;
2997
2998     $int--;
2999     $int |= $int >> $_ foreach (1,2,4,8,16);
3000     return ++$int;
3001 }
3002
3003 sub load_clusterfw_conf {
3004     my ($filename, $verbose) = @_;
3005
3006     $filename = $clusterfw_conf_filename if !defined($filename);
3007
3008     my $cluster_conf = {};
3009     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3010         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3011     }
3012
3013     return $cluster_conf;
3014 }
3015
3016 sub save_clusterfw_conf {
3017     my ($cluster_conf) = @_;
3018
3019     my $raw = '';
3020
3021     my $options = $cluster_conf->{options};
3022     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3023
3024     my $aliases = $cluster_conf->{aliases};
3025     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3026
3027     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3028
3029     my $rules = $cluster_conf->{rules};
3030     if ($rules && scalar(@$rules)) {
3031         $raw .= "[RULES]\n\n";
3032         $raw .= &$format_rules($rules, 1);
3033         $raw .= "\n";
3034     }
3035
3036     if ($cluster_conf->{groups}) {
3037         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3038             my $rules = $cluster_conf->{groups}->{$group};
3039             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3040                 my $utf8comment = encode('utf8', $comment);
3041                 $raw .= "[group $group] # $utf8comment\n\n";
3042             } else {
3043                 $raw .= "[group $group]\n\n";
3044             }
3045
3046             $raw .= &$format_rules($rules, 0);
3047             $raw .= "\n";
3048         }
3049     }
3050
3051     mkdir $pvefw_conf_dir;
3052     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3053 }
3054
3055 sub load_hostfw_conf {
3056     my ($cluster_conf, $filename, $verbose) = @_;
3057
3058     $filename = $hostfw_conf_filename if !defined($filename);
3059
3060     my $hostfw_conf = {};
3061     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3062         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3063     }
3064     return $hostfw_conf;
3065 }
3066
3067 sub save_hostfw_conf {
3068     my ($hostfw_conf) = @_;
3069
3070     my $raw = '';
3071
3072     my $options = $hostfw_conf->{options};
3073     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3074
3075     my $rules = $hostfw_conf->{rules};
3076     if ($rules && scalar(@$rules)) {
3077         $raw .= "[RULES]\n\n";
3078         $raw .= &$format_rules($rules, 1);
3079         $raw .= "\n";
3080     }
3081
3082     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3083 }
3084
3085 sub compile {
3086     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3087
3088     my $vmfw_configs;
3089
3090     if ($vmdata) { # test mode
3091         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3092         my $filename = "$testdir/cluster.fw";
3093         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3094
3095         $filename = "$testdir/host.fw";
3096         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3097
3098         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3099     } else { # normal operation
3100         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3101
3102         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3103
3104         $vmdata = read_local_vm_config();
3105         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3106     }
3107
3108     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3109     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3110
3111     return ($ruleset, $ipset_ruleset, $rulesetv6);
3112 }
3113
3114 sub compile_iptables_filter {
3115     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3116
3117     $cluster_conf->{ipset}->{venet0} = [];
3118     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3119
3120     my $localnet;
3121     if ($cluster_conf->{aliases}->{local_network}) {
3122         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3123     } else {
3124         my $localnet_ver;
3125         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3126
3127         $cluster_conf->{aliases}->{local_network} = {
3128             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3129     }
3130
3131     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3132
3133     return ({}, {}) if !$cluster_conf->{options}->{enable};
3134
3135     my $ruleset = {};
3136
3137     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3138     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3139
3140     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3141
3142     my $hostfw_options = $hostfw_conf->{options} || {};
3143
3144     # fixme: what log level should we use here?
3145     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3146
3147     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3148
3149
3150     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3151     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3152     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3153
3154     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3155     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3156
3157     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3158
3159     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3160     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3161
3162     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3163     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3164
3165     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3166
3167     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3168
3169     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3170
3171     my $ipset_ruleset = {};
3172
3173     if ($hostfw_enable) {
3174         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3175         warn $@ if $@; # just to be sure - should not happen
3176     }
3177
3178     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3179
3180     # generate firewall rules for QEMU VMs
3181     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3182         eval {
3183             my $conf = $vmdata->{qemu}->{$vmid};
3184             my $vmfw_conf = $vmfw_configs->{$vmid};
3185             return if !$vmfw_conf;
3186
3187             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3188
3189             foreach my $netid (keys %$conf) {
3190                 next if $netid !~ m/^net(\d+)$/;
3191                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3192                 next if !$net->{firewall};
3193                 my $iface = "tap${vmid}i$1";
3194
3195                 my $macaddr = $net->{macaddr};
3196                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3197                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3198                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3199                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3200             }
3201         };
3202         warn $@ if $@; # just to be sure - should not happen
3203     }
3204
3205     # generate firewall rules for OpenVZ containers
3206     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3207         eval {
3208             my $conf = $vmdata->{openvz}->{$vmid};
3209
3210             my $vmfw_conf = $vmfw_configs->{$vmid};
3211             return if !$vmfw_conf;
3212
3213             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3214
3215             if ($vmfw_conf->{options}->{enable}) {
3216                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3217                     my $ip = $conf->{ip_address}->{value};
3218                     $ip =~ s/\s+/,/g;
3219
3220                     my @ips = ();
3221
3222                     foreach my $singleip (split(',', $ip)) {
3223                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3224                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3225                         push @ips, $singleip if $singleip_ver == $ipversion;
3226                     }
3227
3228                     if (scalar(@ips)) {
3229                         my $ip_list = join(',', @ips);
3230                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3231                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3232                     }
3233                 }
3234             }
3235
3236             if ($conf->{netif} && $conf->{netif}->{value}) {
3237                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3238                 foreach my $netid (keys %$netif) {
3239                     my $d = $netif->{$netid};
3240                     my $bridge = $d->{bridge};
3241                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3242                     my $macaddr = $d->{mac};
3243                     my $iface = $d->{host_ifname};
3244                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3245                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3246                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3247                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3248                 }
3249             }
3250         };
3251         warn $@ if $@; # just to be sure - should not happen
3252     }
3253
3254     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3255         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3256     }
3257
3258     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3259
3260     return ($ruleset, $ipset_ruleset);
3261 }
3262
3263 sub get_ruleset_status {
3264     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3265
3266     my $statushash = {};
3267
3268     foreach my $chain (sort keys %$ruleset) {
3269         my $sig = &$digest_fn($ruleset->{$chain});
3270
3271         $statushash->{$chain}->{sig} = $sig;
3272
3273         my $oldsig = $active_chains->{$chain};
3274         if (!defined($oldsig)) {
3275             $statushash->{$chain}->{action} = 'create';
3276         } else {
3277             if ($oldsig eq $sig) {
3278                 $statushash->{$chain}->{action} = 'exists';
3279             } else {
3280                 $statushash->{$chain}->{action} = 'update';
3281             }
3282         }
3283         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3284         foreach my $cmd (@{$ruleset->{$chain}}) {
3285             print "\t$cmd\n" if $verbose;
3286         }
3287     }
3288
3289     foreach my $chain (sort keys %$active_chains) {
3290         if (!defined($ruleset->{$chain})) {
3291             my $sig = $active_chains->{$chain};
3292             $statushash->{$chain}->{action} = 'delete';
3293             $statushash->{$chain}->{sig} = $sig;
3294             print "delete $chain ($sig)\n" if $verbose;
3295         }
3296     }
3297
3298     return $statushash;
3299 }
3300
3301 sub print_sig_rule {
3302     my ($chain, $sig) = @_;
3303
3304     # We just use this to store a SHA1 checksum used to detect changes
3305     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3306 }
3307
3308 sub get_ruleset_cmdlist {
3309     my ($ruleset, $verbose, $iptablescmd) = @_;
3310
3311     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3312
3313     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3314     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3315
3316     # create missing chains first
3317     foreach my $chain (sort keys %$ruleset) {
3318         my $stat = $statushash->{$chain};
3319         die "internal error" if !$stat;
3320         next if $stat->{action} ne 'create';
3321
3322         $cmdlist .= ":$chain - [0:0]\n";
3323     }
3324
3325     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3326         my $chain = "PVEFW-$h";
3327         if ($ruleset->{$chain} && !$hooks->{$h}) {
3328             $cmdlist .= "-A $h -j $chain\n";
3329         }
3330     }
3331
3332     foreach my $chain (sort keys %$ruleset) {
3333         my $stat = $statushash->{$chain};
3334         die "internal error" if !$stat;
3335
3336         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3337             $cmdlist .= "-F $chain\n";
3338             foreach my $cmd (@{$ruleset->{$chain}}) {
3339                 $cmdlist .= "$cmd\n";
3340             }
3341             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3342         } elsif ($stat->{action} eq 'delete') {
3343             die "internal error"; # this should not happen
3344         } elsif ($stat->{action} eq 'exists') {
3345             # do nothing
3346         } else {
3347             die "internal error - unknown status '$stat->{action}'";
3348         }
3349     }
3350
3351     foreach my $chain (keys %$statushash) {
3352         next if $statushash->{$chain}->{action} ne 'delete';
3353         $cmdlist .= "-F $chain\n";
3354     }
3355     foreach my $chain (keys %$statushash) {
3356         next if $statushash->{$chain}->{action} ne 'delete';
3357         next if $chain eq 'PVEFW-INPUT';
3358         next if $chain eq 'PVEFW-OUTPUT';
3359         next if $chain eq 'PVEFW-FORWARD';
3360         $cmdlist .= "-X $chain\n";
3361     }
3362
3363     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3364
3365     $cmdlist .= "COMMIT\n";
3366
3367     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3368 }
3369
3370 sub get_ipset_cmdlist {
3371     my ($ruleset, $verbose) = @_;
3372
3373     my $cmdlist = "";
3374
3375     my $delete_cmdlist = "";
3376
3377     my $active_chains = ipset_get_chains();
3378     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3379
3380     # remove stale _swap chains
3381     foreach my $chain (keys %$active_chains) {
3382         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3383             $cmdlist .= "destroy $chain\n";
3384         }
3385     }
3386
3387     foreach my $chain (keys %$ruleset) {
3388         my $stat = $statushash->{$chain};
3389         die "internal error" if !$stat;
3390
3391         if ($stat->{action} eq 'create') {
3392             foreach my $cmd (@{$ruleset->{$chain}}) {
3393                 $cmdlist .= "$cmd\n";
3394             }
3395         }
3396     }
3397
3398     foreach my $chain (keys %$ruleset) {
3399         my $stat = $statushash->{$chain};
3400         die "internal error" if !$stat;
3401
3402         if ($stat->{action} eq 'update') {
3403             my $chain_swap = $chain."_swap";
3404
3405             foreach my $cmd (@{$ruleset->{$chain}}) {
3406                 $cmd =~ s/$chain/$chain_swap/;
3407                 $cmdlist .= "$cmd\n";
3408             }
3409             $cmdlist .= "swap $chain_swap $chain\n";
3410             $cmdlist .= "flush $chain_swap\n";
3411             $cmdlist .= "destroy $chain_swap\n";
3412         }
3413     }
3414
3415      # the remove unused chains
3416     foreach my $chain (keys %$statushash) {
3417         next if $statushash->{$chain}->{action} ne 'delete';
3418
3419         $delete_cmdlist .= "flush $chain\n";
3420         $delete_cmdlist .= "destroy $chain\n";
3421     }
3422
3423     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3424
3425     return ($cmdlist, $delete_cmdlist, $changes);
3426 }
3427
3428 sub apply_ruleset {
3429     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3430
3431     enable_bridge_firewall();
3432
3433     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3434         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3435
3436     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3437     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3438
3439     if ($verbose) {
3440         if ($ipset_changes) {
3441             print "ipset changes:\n";
3442             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3443             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3444         }
3445
3446         if ($changes) {
3447             print "iptables changes:\n";
3448             print $cmdlist;
3449         }
3450
3451         if ($changesv6) {
3452             print "ip6tables changes:\n";
3453             print $cmdlistv6;
3454         }
3455     }
3456
3457     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3458     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3459
3460     ipset_restore_cmdlist($ipset_create_cmdlist);
3461
3462     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3463     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3464
3465     iptables_restore_cmdlist($cmdlist);
3466
3467     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3468     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3469
3470     ip6tables_restore_cmdlist($cmdlistv6);
3471
3472     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3473     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3474
3475     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3476
3477     # test: re-read status and check if everything is up to date
3478     my $active_chains = iptables_get_chains();
3479     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3480
3481     my $errors;
3482     foreach my $chain (sort keys %$ruleset) {
3483         my $stat = $statushash->{$chain};
3484         if ($stat->{action} ne 'exists') {
3485             warn "unable to update chain '$chain'\n";
3486             $errors = 1;
3487         }
3488     }
3489
3490     my $active_chainsv6 = iptables_get_chains("ip6tables");
3491     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3492
3493     foreach my $chain (sort keys %$rulesetv6) {
3494         my $stat = $statushashv6->{$chain};
3495         if ($stat->{action} ne 'exists') {
3496             warn "unable to update chain '$chain'\n";
3497             $errors = 1;
3498         }
3499     }
3500
3501     die "unable to apply firewall changes\n" if $errors;
3502
3503     update_nf_conntrack_max($hostfw_conf);
3504
3505     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3506
3507 }
3508
3509 sub update_nf_conntrack_max {
3510     my ($hostfw_conf) = @_;
3511
3512     my $max = 65536; # reasonable default
3513
3514     my $options = $hostfw_conf->{options} || {};
3515
3516     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3517         $max = $options->{nf_conntrack_max};
3518         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3519     }
3520
3521     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3522     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3523
3524     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3525
3526     if ($current != $max) {
3527         my $hashsize = int($max/4);
3528         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3529         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3530     }
3531 }
3532
3533 sub update_nf_conntrack_tcp_timeout_established {
3534     my ($hostfw_conf) = @_;
3535
3536     my $options = $hostfw_conf->{options} || {};
3537
3538     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3539
3540     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3541 }
3542
3543 sub remove_pvefw_chains {
3544
3545     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3546     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3547     PVE::Firewall::remove_pvefw_chains_ipset();
3548
3549 }
3550
3551 sub remove_pvefw_chains_iptables {
3552     my ($iptablescmd) = @_;
3553
3554     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3555     my $cmdlist = "*filter\n";
3556
3557     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3558         if ($hooks->{$h}) {
3559             $cmdlist .= "-D $h -j PVEFW-$h\n";
3560         }
3561     }
3562
3563     foreach my $chain (keys %$chash) {
3564         $cmdlist .= "-F $chain\n";
3565     }
3566
3567     foreach my $chain (keys %$chash) {
3568         $cmdlist .= "-X $chain\n";
3569     }
3570     $cmdlist .= "COMMIT\n";
3571
3572     if($iptablescmd eq "ip6tables") {
3573         ip6tables_restore_cmdlist($cmdlist);
3574     } else {
3575         iptables_restore_cmdlist($cmdlist);
3576     }
3577 }
3578
3579 sub remove_pvefw_chains_ipset {
3580
3581     my $ipset_chains = ipset_get_chains();
3582
3583     my $cmdlist = "";
3584
3585     foreach my $chain (keys %$ipset_chains) {
3586         $cmdlist .= "flush $chain\n";
3587         $cmdlist .= "destroy $chain\n";
3588     }
3589
3590     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3591 }
3592
3593 sub init {
3594     my $cluster_conf = load_clusterfw_conf();
3595     my $cluster_options = $cluster_conf->{options};
3596     my $enable = $cluster_options->{enable};
3597
3598     return if !$enable;
3599
3600     # load required modules here
3601 }
3602
3603 sub update {
3604     my $code = sub {
3605
3606         my $cluster_conf = load_clusterfw_conf();
3607         my $cluster_options = $cluster_conf->{options};
3608
3609         if (!$cluster_options->{enable}) {
3610             PVE::Firewall::remove_pvefw_chains();
3611             return;
3612         }
3613
3614         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3615
3616         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3617
3618         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3619     };
3620
3621     run_locked($code);
3622 }
3623
3624 1;