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::LXC
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     require PVE::QemuConfig;
  32     $have_qemu_server = 1;
  33 };
  34
  35 my $have_lxc;
  36 eval {
  37     require PVE::LXC;
  38     $have_lxc = 1;
  39 };
  40
  41
  42 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  43
  44 mkdir $pve_fw_status_dir; # make sure this exists
  45
  46 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49
  50 my $max_alias_name_length = 64;
  51 my $max_ipset_name_length = 64;
  52 my $max_group_name_length = 20;
  53
  54 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  55 sub pve_verify_ip_or_cidr {
  56     my ($cidr, $noerr) = @_;
  57
  58     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  59         return $cidr if Net::IP->new($cidr);
  60         return undef if $noerr;
  61         die Net::IP::Error() . "\n";
  62     }
  63     return undef if $noerr;
  64     die "value does not look like a valid IP address or CIDR network\n";
  65 }
  66
  67 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  68 sub pve_verify_ip_or_cidr_or_alias {
  69     my ($cidr, $noerr) = @_;
  70
  71     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  72
  73     return pve_verify_ip_or_cidr($cidr, $noerr);
  74 }
  75
  76 PVE::JSONSchema::register_standard_option('ipset-name', {
  77     description => "IP set name.",
  78     type => 'string',
  79     pattern => $ipset_name_pattern,
  80     minLength => 2,
  81     maxLength => $max_ipset_name_length,
  82 });
  83
  84 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  85     description => "Alias name.",
  86     type => 'string',
  87     pattern => $ip_alias_pattern,
  88     minLength => 2,
  89     maxLength => $max_alias_name_length,
  90 });
  91
  92 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  93     description => "Log level.",
  94     type => 'string',
  95     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  96     optional => 1,
  97 });
  98
  99 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 100     description => "Security Group name.",
 101     type => 'string',
 102     pattern => $security_group_name_pattern,
 103     minLength => 2,
 104     maxLength => $max_group_name_length,
 105 });
 106
 107 my $feature_ipset_nomatch = 0;
 108 eval  {
 109     my (undef, undef, $release) = POSIX::uname();
 110     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 111         my ($major, $minor) = ($1, $2);
 112         $feature_ipset_nomatch = 1 if ($major > 3) ||
 113             ($major == 3 && $minor >= 7);
 114     }
 115
 116 };
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         "DHCPv6 traffic",
 149         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 150     ],
 151     'Trcrt' => [
 152         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 153         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 154     ],
 155  };
 156
 157 # imported/converted from: /usr/share/shorewall/macro.*
 158 my $pve_fw_macros = {
 159     'Amanda' => [
 160         "Amanda Backup",
 161         { action => 'PARAM', proto => 'udp', dport => '10080' },
 162         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 163     ],
 164     'Auth' => [
 165         "Auth (identd) traffic",
 166         { action => 'PARAM', proto => 'tcp', dport => '113' },
 167     ],
 168     'BGP' => [
 169         "Border Gateway Protocol traffic",
 170         { action => 'PARAM', proto => 'tcp', dport => '179' },
 171     ],
 172     'BitTorrent' => [
 173         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 174         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 175         { action => 'PARAM', proto => 'udp', dport => '6881' },
 176     ],
 177     'BitTorrent32' => [
 178         "BitTorrent traffic for BitTorrent 3.2 and later",
 179         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 180         { action => 'PARAM', proto => 'udp', dport => '6881' },
 181     ],
 182     'Ceph' => [
 183         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 184         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 185         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 186     ],
 187     'CVS' => [
 188         "Concurrent Versions System pserver traffic",
 189         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 190     ],
 191     'Citrix' => [
 192         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 193         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 194         { action => 'PARAM', proto => 'udp', dport => '1604' },
 195         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 196     ],
 197     'DAAP' => [
 198         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 199         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 200         { action => 'PARAM', proto => 'udp', dport => '3689' },
 201     ],
 202     'DCC' => [
 203         "Distributed Checksum Clearinghouse spam filtering mechanism",
 204         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 205     ],
 206     'DHCPfwd' => [
 207         "Forwarded DHCP traffic",
 208         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 209     ],
 210     'DNS' => [
 211         "Domain Name System traffic (upd and tcp)",
 212         { action => 'PARAM', proto => 'udp', dport => '53' },
 213         { action => 'PARAM', proto => 'tcp', dport => '53' },
 214     ],
 215     'Distcc' => [
 216         "Distributed Compiler service",
 217         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 218     ],
 219     'FTP' => [
 220         "File Transfer Protocol",
 221         { action => 'PARAM', proto => 'tcp', dport => '21' },
 222     ],
 223     'Finger' => [
 224         "Finger protocol (RFC 742)",
 225         { action => 'PARAM', proto => 'tcp', dport => '79' },
 226     ],
 227     'GNUnet' => [
 228         "GNUnet secure peer-to-peer networking traffic",
 229         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 230         { action => 'PARAM', proto => 'udp', dport => '2086' },
 231         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 232         { action => 'PARAM', proto => 'udp', dport => '1080' },
 233     ],
 234     'GRE' => [
 235         "Generic Routing Encapsulation tunneling protocol",
 236         { action => 'PARAM', proto => '47' },
 237     ],
 238     'Git' => [
 239         "Git distributed revision control traffic",
 240         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 241     ],
 242     'HKP' => [
 243         "OpenPGP HTTP keyserver protocol traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 245     ],
 246     'HTTP' => [
 247         "Hypertext Transfer Protocol (WWW)",
 248         { action => 'PARAM', proto => 'tcp', dport => '80' },
 249     ],
 250     'HTTPS' => [
 251         "Hypertext Transfer Protocol (WWW) over SSL",
 252         { action => 'PARAM', proto => 'tcp', dport => '443' },
 253     ],
 254     'ICPV2' => [
 255         "Internet Cache Protocol V2 (Squid) traffic",
 256         { action => 'PARAM', proto => 'udp', dport => '3130' },
 257     ],
 258     'ICQ' => [
 259         "AOL Instant Messenger traffic",
 260         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 261     ],
 262     'IMAP' => [
 263         "Internet Message Access Protocol",
 264         { action => 'PARAM', proto => 'tcp', dport => '143' },
 265     ],
 266     'IMAPS' => [
 267         "Internet Message Access Protocol over SSL",
 268         { action => 'PARAM', proto => 'tcp', dport => '993' },
 269     ],
 270     'IPIP' => [
 271         "IPIP capsulation traffic",
 272         { action => 'PARAM', proto => '94' },
 273     ],
 274     'IPsec' => [
 275         "IPsec traffic",
 276         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 277         { action => 'PARAM', proto => '50' },
 278     ],
 279     'IPsecah' => [
 280         "IPsec authentication (AH) traffic",
 281         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 282         { action => 'PARAM', proto => '51' },
 283     ],
 284     'IPsecnat' => [
 285         "IPsec traffic and Nat-Traversal",
 286         { action => 'PARAM', proto => 'udp', dport => '500' },
 287         { action => 'PARAM', proto => 'udp', dport => '4500' },
 288         { action => 'PARAM', proto => '50' },
 289     ],
 290     'IRC' => [
 291         "Internet Relay Chat traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 293     ],
 294     'Jetdirect' => [
 295         "HP Jetdirect printing",
 296         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 297     ],
 298     'L2TP' => [
 299         "Layer 2 Tunneling Protocol traffic",
 300         { action => 'PARAM', proto => 'udp', dport => '1701' },
 301     ],
 302     'LDAP' => [
 303         "Lightweight Directory Access Protocol traffic",
 304         { action => 'PARAM', proto => 'tcp', dport => '389' },
 305     ],
 306     'LDAPS' => [
 307         "Secure Lightweight Directory Access Protocol traffic",
 308         { action => 'PARAM', proto => 'tcp', dport => '636' },
 309     ],
 310     'MSNP' => [
 311         "Microsoft Notification Protocol",
 312         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 313     ],
 314     'MSSQL' => [
 315         "Microsoft SQL Server",
 316         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 317     ],
 318     'Mail' => [
 319         "Mail traffic (SMTP, SMTPS, Submission)",
 320         { action => 'PARAM', proto => 'tcp', dport => '25' },
 321         { action => 'PARAM', proto => 'tcp', dport => '465' },
 322         { action => 'PARAM', proto => 'tcp', dport => '587' },
 323     ],
 324     'Munin' => [
 325         "Munin networked resource monitoring traffic",
 326         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 327     ],
 328     'MySQL' => [
 329         "MySQL server",
 330         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 331     ],
 332     'NNTP' => [
 333         "NNTP traffic (Usenet).",
 334         { action => 'PARAM', proto => 'tcp', dport => '119' },
 335     ],
 336     'NNTPS' => [
 337         "Encrypted NNTP traffic (Usenet)",
 338         { action => 'PARAM', proto => 'tcp', dport => '563' },
 339     ],
 340     'NTP' => [
 341         "Network Time Protocol (ntpd)",
 342         { action => 'PARAM', proto => 'udp', dport => '123' },
 343     ],
 344     'OSPF' => [
 345         "OSPF multicast traffic",
 346         { action => 'PARAM', proto => '89' },
 347     ],
 348     'OpenVPN' => [
 349         "OpenVPN traffic",
 350         { action => 'PARAM', proto => 'udp', dport => '1194' },
 351     ],
 352     'PCA' => [
 353         "Symantec PCAnywere (tm)",
 354         { action => 'PARAM', proto => 'udp', dport => '5632' },
 355         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 356     ],
 357     'POP3' => [
 358         "POP3 traffic",
 359         { action => 'PARAM', proto => 'tcp', dport => '110' },
 360     ],
 361     'POP3S' => [
 362         "Encrypted POP3 traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '995' },
 364     ],
 365     'PPtP' => [
 366         "Point-to-Point Tunneling Protocol",
 367         { action => 'PARAM', proto => '47' },
 368         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 369     ],
 370     'Ping' => [
 371         "ICMP echo request",
 372         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 373     ],
 374     'PostgreSQL' => [
 375         "PostgreSQL server",
 376         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 377     ],
 378     'Printer' => [
 379         "Line Printer protocol printing",
 380         { action => 'PARAM', proto => 'tcp', dport => '515' },
 381     ],
 382     'RDP' => [
 383         "Microsoft Remote Desktop Protocol traffic",
 384         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 385     ],
 386     'RIP' => [
 387         "Routing Information Protocol (bidirectional)",
 388         { action => 'PARAM', proto => 'udp', dport => '520' },
 389     ],
 390     'RNDC' => [
 391         "BIND remote management protocol",
 392         { action => 'PARAM', proto => 'tcp', dport => '953' },
 393     ],
 394     'Razor' => [
 395         "Razor Antispam System",
 396         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 397     ],
 398     'Rdate' => [
 399         "Remote time retrieval (rdate)",
 400         { action => 'PARAM', proto => 'tcp', dport => '37' },
 401     ],
 402     'Rsync' => [
 403         "Rsync server",
 404         { action => 'PARAM', proto => 'tcp', dport => '873' },
 405     ],
 406     'SANE' => [
 407         "SANE network scanning",
 408         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 409     ],
 410     'SMB' => [
 411         "Microsoft SMB traffic",
 412         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 413         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 414         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 415         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 416     ],
 417     'SMBswat' => [
 418         "Samba Web Administration Tool",
 419         { action => 'PARAM', proto => 'tcp', dport => '901' },
 420     ],
 421     'SMTP' => [
 422         "Simple Mail Transfer Protocol",
 423         { action => 'PARAM', proto => 'tcp', dport => '25' },
 424     ],
 425     'SMTPS' => [
 426         "Encrypted Simple Mail Transfer Protocol",
 427         { action => 'PARAM', proto => 'tcp', dport => '465' },
 428     ],
 429     'SNMP' => [
 430         "Simple Network Management Protocol",
 431         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 432         { action => 'PARAM', proto => 'tcp', dport => '161' },
 433     ],
 434     'SPAMD' => [
 435         "Spam Assassin SPAMD traffic",
 436         { action => 'PARAM', proto => 'tcp', dport => '783' },
 437     ],
 438     'SSH' => [
 439         "Secure shell traffic",
 440         { action => 'PARAM', proto => 'tcp', dport => '22' },
 441     ],
 442     'SVN' => [
 443         "Subversion server (svnserve)",
 444         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 445     ],
 446     'SixXS' => [
 447         "SixXS IPv6 Deployment and Tunnel Broker",
 448         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 449         { action => 'PARAM', proto => 'udp', dport => '3740' },
 450         { action => 'PARAM', proto => '41' },
 451         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 452     ],
 453     'Squid' => [
 454         "Squid web proxy traffic",
 455         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 456     ],
 457     'Submission' => [
 458         "Mail message submission traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '587' },
 460     ],
 461     'Syslog' => [
 462         "Syslog protocol (RFC 5424) traffic",
 463         { action => 'PARAM', proto => 'udp', dport => '514' },
 464         { action => 'PARAM', proto => 'tcp', dport => '514' },
 465     ],
 466     'TFTP' => [
 467         "Trivial File Transfer Protocol traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '69' },
 469     ],
 470     'Telnet' => [
 471         "Telnet traffic",
 472         { action => 'PARAM', proto => 'tcp', dport => '23' },
 473     ],
 474     'Telnets' => [
 475         "Telnet over SSL",
 476         { action => 'PARAM', proto => 'tcp', dport => '992' },
 477     ],
 478     'Time' => [
 479         "RFC 868 Time protocol",
 480         { action => 'PARAM', proto => 'tcp', dport => '37' },
 481     ],
 482     'Trcrt' => [
 483         "Traceroute (for up to 30 hops) traffic",
 484         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 485         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 486     ],
 487     'VNC' => [
 488         "VNC traffic for VNC display's 0 - 99",
 489         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 490     ],
 491     'VNCL' => [
 492         "VNC traffic from Vncservers to Vncviewers in listen mode",
 493         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 494     ],
 495     'Web' => [
 496         "WWW traffic (HTTP and HTTPS)",
 497         { action => 'PARAM', proto => 'tcp', dport => '80' },
 498         { action => 'PARAM', proto => 'tcp', dport => '443' },
 499     ],
 500     'Webcache' => [
 501         "Web Cache/Proxy traffic (port 8080)",
 502         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 503     ],
 504     'Webmin' => [
 505         "Webmin traffic",
 506         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 507     ],
 508     'Whois' => [
 509         "Whois (nicname, RFC 3912) traffic",
 510         { action => 'PARAM', proto => 'tcp', dport => '43' },
 511     ],
 512 };
 513
 514 my $pve_fw_parsed_macros;
 515 my $pve_fw_macro_descr;
 516 my $pve_fw_macro_ipversion = {};
 517 my $pve_fw_preferred_macro_names = {};
 518
 519 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 520 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 521
 522 my $pve_std_chains = {};
 523 $pve_std_chains->{4} = {
 524     'PVEFW-SET-ACCEPT-MARK' => [
 525         "-j MARK --set-mark $FWACCEPTMARK_ON",
 526     ],
 527     'PVEFW-DropBroadcast' => [
 528         # same as shorewall 'Broadcast'
 529         # simply DROP BROADCAST/MULTICAST/ANYCAST
 530         # we can use this to reduce logging
 531         { action => 'DROP', dsttype => 'BROADCAST' },
 532         { action => 'DROP', dsttype => 'MULTICAST' },
 533         { action => 'DROP', dsttype => 'ANYCAST' },
 534         { action => 'DROP', dest => '224.0.0.0/4' },
 535     ],
 536     'PVEFW-reject' => [
 537         # same as shorewall 'reject'
 538         { action => 'DROP', dsttype => 'BROADCAST' },
 539         { action => 'DROP', source => '224.0.0.0/4' },
 540         { action => 'DROP', proto => 'icmp' },
 541         "-p tcp -j REJECT --reject-with tcp-reset",
 542         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 543         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 544         "-j REJECT --reject-with icmp-host-prohibited",
 545     ],
 546     'PVEFW-Drop' => [
 547         # same as shorewall 'Drop', which is equal to DROP,
 548         # but REJECT/DROP some packages to reduce logging,
 549         # and ACCEPT critical ICMP types
 550         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 551         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 552         { action => 'PVEFW-DropBroadcast' },
 553         # ACCEPT critical ICMP types
 554         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 556         # Drop packets with INVALID state
 557         "-m conntrack --ctstate INVALID -j DROP",
 558         # Drop Microsoft SMB noise
 559         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 560         { action => 'DROP', proto => 'udp', dport => '137:139'},
 561         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 562         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 563         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 564         # Drop new/NotSyn traffic so that it doesn't get logged
 565         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 566         # Drop DNS replies
 567         { action => 'DROP', proto => 'udp', sport => 53 },
 568     ],
 569     'PVEFW-Reject' => [
 570         # same as shorewall 'Reject', which is equal to Reject,
 571         # but REJECT/DROP some packages to reduce logging,
 572         # and ACCEPT critical ICMP types
 573         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 574         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 575         { action => 'PVEFW-DropBroadcast' },
 576         # ACCEPT critical ICMP types
 577         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 578         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 579         # Drop packets with INVALID state
 580         "-m conntrack --ctstate INVALID -j DROP",
 581         # Drop Microsoft SMB noise
 582         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 583         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 584         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 585         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 586         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 587         # Drop new/NotSyn traffic so that it doesn't get logged
 588         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 589         # Drop DNS replies
 590         { action => 'DROP', proto => 'udp', sport => 53 },
 591     ],
 592     'PVEFW-tcpflags' => [
 593         # same as shorewall tcpflags action.
 594         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 595         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 596         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 597         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 598         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 599         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 600     ],
 601     'PVEFW-smurfs' => [
 602         # same as shorewall smurfs action
 603         # Filter packets for smurfs (packets with a broadcast address as the source).
 604         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 605         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 606         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 607     ],
 608 };
 609
 610 $pve_std_chains->{6} = {
 611     'PVEFW-SET-ACCEPT-MARK' => [
 612         "-j MARK --set-mark $FWACCEPTMARK_ON",
 613     ],
 614     'PVEFW-DropBroadcast' => [
 615         # same as shorewall 'Broadcast'
 616         # simply DROP BROADCAST/MULTICAST/ANYCAST
 617         # we can use this to reduce logging
 618         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 619         # ipv6 addrtype does not work with kernel 2.6.32
 620         #{ action => 'DROP', dsttype => 'MULTICAST' },
 621         #{ action => 'DROP', dsttype => 'ANYCAST' },
 622         { action => 'DROP', dest => 'ff00::/8' },
 623         #{ action => 'DROP', dest => '224.0.0.0/4' },
 624     ],
 625     'PVEFW-reject' => [
 626         # same as shorewall 'reject'
 627         #{ action => 'DROP', dsttype => 'BROADCAST' },
 628         #{ action => 'DROP', source => '224.0.0.0/4' },
 629         { action => 'DROP', proto => 'icmpv6' },
 630         "-p tcp -j REJECT --reject-with tcp-reset",
 631         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 632         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 633         #"-j REJECT --reject-with icmp-host-prohibited",
 634     ],
 635     'PVEFW-Drop' => [
 636         # same as shorewall 'Drop', which is equal to DROP,
 637         # but REJECT/DROP some packages to reduce logging,
 638         # and ACCEPT critical ICMP types
 639         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 640         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 641         { action => 'PVEFW-DropBroadcast' },
 642         # ACCEPT critical ICMP types
 643         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 644         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 645         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 646
 647         # Drop packets with INVALID state
 648         "-m conntrack --ctstate INVALID -j DROP",
 649         # Drop Microsoft SMB noise
 650         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 651         { action => 'DROP', proto => 'udp', dport => '137:139'},
 652         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 653         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 654         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 655         # Drop new/NotSyn traffic so that it doesn't get logged
 656         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 657         # Drop DNS replies
 658         { action => 'DROP', proto => 'udp', sport => 53 },
 659     ],
 660     'PVEFW-Reject' => [
 661         # same as shorewall 'Reject', which is equal to Reject,
 662         # but REJECT/DROP some packages to reduce logging,
 663         # and ACCEPT critical ICMP types
 664         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 665         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 666         { action => 'PVEFW-DropBroadcast' },
 667         # ACCEPT critical ICMP types
 668         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 669         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 670         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 671
 672         # Drop packets with INVALID state
 673         "-m conntrack --ctstate INVALID -j DROP",
 674         # Drop Microsoft SMB noise
 675         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 676         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 677         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 678         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 679         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 680         # Drop new/NotSyn traffic so that it doesn't get logged
 681         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 682         # Drop DNS replies
 683         { action => 'DROP', proto => 'udp', sport => 53 },
 684     ],
 685     'PVEFW-tcpflags' => [
 686         # same as shorewall tcpflags action.
 687         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 688         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 689         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 690         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 691         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 692         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 693     ],
 694 };
 695
 696 # iptables -p icmp -h
 697 my $icmp_type_names = {
 698     any => 1,
 699     'echo-reply' => 1,
 700     'destination-unreachable' => 1,
 701     'network-unreachable' => 1,
 702     'host-unreachable' => 1,
 703     'protocol-unreachable' => 1,
 704     'port-unreachable' => 1,
 705     'fragmentation-needed' => 1,
 706     'source-route-failed' => 1,
 707     'network-unknown' => 1,
 708     'host-unknown' => 1,
 709     'network-prohibited' => 1,
 710     'host-prohibited' => 1,
 711     'TOS-network-unreachable' => 1,
 712     'TOS-host-unreachable' => 1,
 713     'communication-prohibited' => 1,
 714     'host-precedence-violation' => 1,
 715     'precedence-cutoff' => 1,
 716     'source-quench' => 1,
 717     'redirect' => 1,
 718     'network-redirect' => 1,
 719     'host-redirect' => 1,
 720     'TOS-network-redirect' => 1,
 721     'TOS-host-redirect' => 1,
 722     'echo-request' => 1,
 723     'router-advertisement' => 1,
 724     'router-solicitation' => 1,
 725     'time-exceeded' => 1,
 726     'ttl-zero-during-transit' => 1,
 727     'ttl-zero-during-reassembly' => 1,
 728     'parameter-problem' => 1,
 729     'ip-header-bad' => 1,
 730     'required-option-missing' => 1,
 731     'timestamp-request' => 1,
 732     'timestamp-reply' => 1,
 733     'address-mask-request' => 1,
 734     'address-mask-reply' => 1,
 735 };
 736
 737 # ip6tables -p icmpv6 -h
 738
 739 my $icmpv6_type_names = {
 740     'any' => 1,
 741     'destination-unreachable' => 1,
 742     'no-route' => 1,
 743     'communication-prohibited' => 1,
 744     'address-unreachable' => 1,
 745     'port-unreachable' => 1,
 746     'packet-too-big' => 1,
 747     'time-exceeded' => 1,
 748     'ttl-zero-during-transit' => 1,
 749     'ttl-zero-during-reassembly' => 1,
 750     'parameter-problem' => 1,
 751     'bad-header' => 1,
 752     'unknown-header-type' => 1,
 753     'unknown-option' => 1,
 754     'echo-request' => 1,
 755     'echo-reply' => 1,
 756     'router-solicitation' => 1,
 757     'router-advertisement' => 1,
 758     'neighbor-solicitation' => 1,
 759     'neighbour-solicitation' => 1,
 760     'neighbor-advertisement' => 1,
 761     'neighbour-advertisement' => 1,
 762     'redirect' => 1,
 763 };
 764
 765 sub init_firewall_macros {
 766
 767     $pve_fw_parsed_macros = {};
 768
 769     my $parse = sub {
 770         my ($k, $macro) = @_;
 771         my $lc_name = lc($k);
 772         $pve_fw_macro_ipversion->{$k} = 0;
 773         while (!ref($macro->[0])) {
 774             my $desc = shift @$macro;
 775             if ($desc eq 'ipv4only') {
 776                 $pve_fw_macro_ipversion->{$k} = 4;
 777             } elsif ($desc eq 'ipv6only') {
 778                 $pve_fw_macro_ipversion->{$k} = 6;
 779             } else {
 780                 $pve_fw_macro_descr->{$k} = $desc;
 781             }
 782         }
 783         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 784         $pve_fw_parsed_macros->{$k} = $macro;
 785     };
 786
 787     foreach my $k (keys %$pve_fw_macros) {
 788         &$parse($k, $pve_fw_macros->{$k});
 789     }
 790
 791     foreach my $k (keys %$pve_ipv6fw_macros) {
 792         next if $pve_fw_parsed_macros->{$k};
 793         &$parse($k, $pve_ipv6fw_macros->{$k});
 794         $pve_fw_macro_ipversion->{$k} = 6;
 795     }
 796 }
 797
 798 init_firewall_macros();
 799
 800 sub get_macros {
 801     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 802 }
 803
 804 my $etc_services;
 805
 806 sub get_etc_services {
 807
 808     return $etc_services if $etc_services;
 809
 810     my $filename = "/etc/services";
 811
 812     my $fh = IO::File->new($filename, O_RDONLY);
 813     if (!$fh) {
 814         warn "unable to read '$filename' - $!\n";
 815         return {};
 816     }
 817
 818     my $services = {};
 819
 820     while (my $line = <$fh>) {
 821         chomp ($line);
 822         next if $line =~m/^#/;
 823         next if ($line =~m/^\s*$/);
 824
 825         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 826             $services->{byid}->{$2}->{name} = $1;
 827             $services->{byid}->{$2}->{port} = $2;
 828             $services->{byid}->{$2}->{$3} = 1;
 829             $services->{byname}->{$1} = $services->{byid}->{$2};
 830         }
 831     }
 832
 833     close($fh);
 834
 835     $etc_services = $services;
 836
 837
 838     return $etc_services;
 839 }
 840
 841 my $etc_protocols;
 842
 843 sub get_etc_protocols {
 844     return $etc_protocols if $etc_protocols;
 845
 846     my $filename = "/etc/protocols";
 847
 848     my $fh = IO::File->new($filename, O_RDONLY);
 849     if (!$fh) {
 850         warn "unable to read '$filename' - $!\n";
 851         return {};
 852     }
 853
 854     my $protocols = {};
 855
 856     while (my $line = <$fh>) {
 857         chomp ($line);
 858         next if $line =~m/^#/;
 859         next if ($line =~m/^\s*$/);
 860
 861         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 862             $protocols->{byid}->{$2}->{name} = $1;
 863             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 864         }
 865     }
 866
 867     close($fh);
 868
 869     # add special case for ICMP v6
 870     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 871     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 872
 873     $etc_protocols = $protocols;
 874
 875     return $etc_protocols;
 876 }
 877
 878 my $ipv4_mask_hash_localnet = {
 879     '255.255.0.0' => 16,
 880     '255.255.128.0' => 17,
 881     '255.255.192.0' => 18,
 882     '255.255.224.0' => 19,
 883     '255.255.240.0' => 20,
 884     '255.255.248.0' => 21,
 885     '255.255.252.0' => 22,
 886     '255.255.254.0' => 23,
 887     '255.255.255.0' => 24,
 888     '255.255.255.128' => 25,
 889     '255.255.255.192' => 26,
 890     '255.255.255.224' => 27,
 891     '255.255.255.240' => 28,
 892     '255.255.255.248' => 29,
 893     '255.255.255.252' => 30,
 894 };
 895
 896 my $__local_network;
 897
 898 sub local_network {
 899     my ($new_value) = @_;
 900
 901     $__local_network = $new_value if defined($new_value);
 902
 903     return $__local_network if defined($__local_network);
 904
 905     eval {
 906         my $nodename = PVE::INotify::nodename();
 907
 908         my $ip = PVE::Cluster::remote_node_ip($nodename);
 909
 910         my $testip = Net::IP->new($ip);
 911
 912         my $isv6 = $testip->version == 6;
 913         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 914                            : PVE::ProcFSTools::read_proc_net_route();
 915         foreach my $entry (@$routes) {
 916             my $mask;
 917             if ($isv6) {
 918                 $mask = $entry->{prefix};
 919             } else {
 920                 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 921                 next if !defined($mask);
 922             }
 923             my $cidr = "$entry->{dest}/$mask";
 924             my $testnet = Net::IP->new($cidr);
 925             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 926                 $__local_network = $cidr;
 927                 return;
 928             }
 929         }
 930     };
 931     warn $@ if $@;
 932
 933     return $__local_network;
 934 }
 935
 936 # ipset names are limited to 31 characters,
 937 # and we use '-v4' or '-v6' to indicate IP versions,
 938 # and we use '_swap' suffix for atomic update,
 939 # for example PVEFW-${VMID}-${ipset_name}_swap
 940
 941 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 942
 943 sub compute_ipset_chain_name {
 944     my ($vmid, $ipset_name, $ipversion) = @_;
 945
 946     $vmid = 0 if !defined($vmid);
 947
 948     my $id = "$vmid-${ipset_name}-v$ipversion";
 949
 950     if (length($id) > $max_iptables_ipset_name_length) {
 951         $id = PVE::Tools::fnv31a_hex($id);
 952     }
 953
 954     return "PVEFW-$id";
 955 }
 956
 957 sub compute_ipfilter_ipset_name {
 958     my ($iface) = @_;
 959
 960     return "ipfilter-$iface";
 961 }
 962
 963 sub parse_address_list {
 964     my ($str) = @_;
 965
 966     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 967         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 968         return;
 969     }
 970
 971     if ($str =~ m/^${ip_alias_pattern}$/) {
 972         die "alias name too long\n" if length($str) > $max_alias_name_length;
 973         return;
 974     }
 975
 976     my $count = 0;
 977     my $iprange = 0;
 978     my $ipversion;
 979
 980     foreach my $elem (split(/,/, $str)) {
 981         $count++;
 982         my $ip = Net::IP->new($elem);
 983         if (!$ip) {
 984             my $err = Net::IP::Error();
 985             die "invalid IP address: $err\n";
 986         }
 987         $iprange = 1 if $elem =~ m/-/;
 988
 989         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 990
 991         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 992             if $ipversion && ($new_ipversion != $ipversion);
 993
 994         $ipversion = $new_ipversion;
 995     }
 996
 997     die "you can't use a range in a list\n" if $iprange && $count > 1;
 998
 999     return $ipversion;
1000 }
1001
1002 sub parse_port_name_number_or_range {
1003     my ($str, $dport) = @_;
1004
1005     my $services = PVE::Firewall::get_etc_services();
1006     my $count = 0;
1007     my $icmp_port = 0;
1008
1009     foreach my $item (split(/,/, $str)) {
1010         $count++;
1011         if ($item =~ m/^(\d+):(\d+)$/) {
1012             my ($port1, $port2) = ($1, $2);
1013             die "invalid port '$port1'\n" if $port1 > 65535;
1014             die "invalid port '$port2'\n" if $port2 > 65535;
1015         } elsif ($item =~ m/^(\d+)$/) {
1016             my $port = $1;
1017             die "invalid port '$port'\n" if $port > 65535;
1018         } else {
1019             if ($dport && $icmp_type_names->{$item}) {
1020                 $icmp_port = 1;
1021             } elsif ($dport && $icmpv6_type_names->{$item}) {
1022                 $icmp_port = 1;
1023             } else {
1024                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1025             }
1026         }
1027     }
1028
1029     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1030
1031     return $count;
1032 }
1033
1034 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1035 sub pve_fw_verify_sport_spec {
1036    my ($portstr) = @_;
1037
1038    parse_port_name_number_or_range($portstr, 0);
1039
1040    return $portstr;
1041 }
1042
1043 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1044 sub pve_fw_verify_dport_spec {
1045    my ($portstr) = @_;
1046
1047    parse_port_name_number_or_range($portstr, 1);
1048
1049    return $portstr;
1050 }
1051
1052 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1053 sub pve_fw_verify_addr_spec {
1054    my ($list) = @_;
1055
1056    parse_address_list($list);
1057
1058    return $list;
1059 }
1060
1061 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1062 sub pve_fw_verify_protocol_spec {
1063    my ($proto) = @_;
1064
1065    my $protocols = get_etc_protocols();
1066
1067    die "unknown protocol '$proto'\n" if $proto &&
1068        !(defined($protocols->{byname}->{$proto}) ||
1069          defined($protocols->{byid}->{$proto}));
1070
1071    return $proto;
1072 }
1073
1074
1075 # helper function for API
1076
1077 sub copy_opject_with_digest {
1078     my ($object) = @_;
1079
1080     my $sha = Digest::SHA->new('sha1');
1081
1082     my $res = {};
1083     foreach my $k (sort keys %$object) {
1084         my $v = $object->{$k};
1085         next if !defined($v);
1086         $res->{$k} = $v;
1087         $sha->add($k, ':', $v, "\n");
1088     }
1089
1090     my $digest = $sha->hexdigest;
1091
1092     $res->{digest} = $digest;
1093
1094     return wantarray ? ($res, $digest) : $res;
1095 }
1096
1097 sub copy_list_with_digest {
1098     my ($list) = @_;
1099
1100     my $sha = Digest::SHA->new('sha1');
1101
1102     my $res = [];
1103     foreach my $entry (@$list) {
1104         my $data = {};
1105         foreach my $k (sort keys %$entry) {
1106             my $v = $entry->{$k};
1107             next if !defined($v);
1108             $data->{$k} = $v;
1109             # Note: digest ignores refs ($rule->{errors})
1110             # since Digest::SHA expects a series of bytes,
1111             #  we have to encode the value here to prevent errors when
1112             #  using utf8 characters (eg. in comments)
1113             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1114         }
1115         push @$res, $data;
1116     }
1117
1118     my $digest = $sha->hexdigest;
1119
1120     foreach my $entry (@$res) {
1121         $entry->{digest} = $digest;
1122     }
1123
1124     return wantarray ? ($res, $digest) : $res;
1125 }
1126
1127
1128 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1129
1130 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1131
1132 my $rule_properties = {
1133     pos => {
1134         description => "Update rule at position <pos>.",
1135         type => 'integer',
1136         minimum => 0,
1137         optional => 1,
1138     },
1139     digest => get_standard_option('pve-config-digest'),
1140     type => {
1141         type => 'string',
1142         optional => 1,
1143         enum => ['in', 'out', 'group'],
1144     },
1145     action => {
1146         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1147         type => 'string',
1148         optional => 1,
1149         pattern => $security_group_name_pattern,
1150         maxLength => 20,
1151         minLength => 2,
1152     },
1153     macro => {
1154         type => 'string',
1155         optional => 1,
1156         maxLength => 128,
1157     },
1158     iface => get_standard_option('pve-iface', {
1159         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1160         optional => 1
1161     }),
1162     source => {
1163         description => "Restrict packet source address. $addr_list_descr",
1164         type => 'string', format => 'pve-fw-addr-spec',
1165         optional => 1,
1166     },
1167     dest => {
1168         description => "Restrict packet destination address. $addr_list_descr",
1169         type => 'string', format => 'pve-fw-addr-spec',
1170         optional => 1,
1171     },
1172     proto => {
1173         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1174         type => 'string', format => 'pve-fw-protocol-spec',
1175         optional => 1,
1176     },
1177     enable => {
1178         type => 'integer',
1179         minimum => 0,
1180         optional => 1,
1181     },
1182     sport => {
1183         description => "Restrict TCP/UDP source port. $port_descr",
1184         type => 'string', format => 'pve-fw-sport-spec',
1185         optional => 1,
1186     },
1187     dport => {
1188         description => "Restrict TCP/UDP destination port. $port_descr",
1189         type => 'string', format => 'pve-fw-dport-spec',
1190         optional => 1,
1191     },
1192     comment => {
1193         type => 'string',
1194         optional => 1,
1195     },
1196 };
1197
1198 sub add_rule_properties {
1199     my ($properties) = @_;
1200
1201     foreach my $k (keys %$rule_properties) {
1202         my $h = $rule_properties->{$k};
1203         # copy data, so that we can modify later without side effects
1204         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1205     }
1206
1207     return $properties;
1208 }
1209
1210 sub delete_rule_properties {
1211     my ($rule, $delete_str) = @_;
1212
1213     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1214         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1215             if !defined($rule_properties->{$opt});
1216         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1217             if $opt eq 'type' || $opt eq 'action';
1218         delete $rule->{$opt};
1219     }
1220
1221     return $rule;
1222 }
1223
1224 my $apply_macro = sub {
1225     my ($macro_name, $param, $verify, $ipversion) = @_;
1226
1227     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1228     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1229
1230     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1231         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1232     }
1233
1234     # skip macros which are specific to another ipversion
1235     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1236         return if $ipversion != $required;
1237     }
1238
1239     my $rules = [];
1240
1241     foreach my $templ (@$macro_rules) {
1242         my $rule = {};
1243         my $param_used = {};
1244         foreach my $k (keys %$templ) {
1245             my $v = $templ->{$k};
1246             if ($v eq 'PARAM') {
1247                 $v = $param->{$k};
1248                 $param_used->{$k} = 1;
1249             } elsif ($v eq 'DEST') {
1250                 $v = $param->{dest};
1251                 $param_used->{dest} = 1;
1252             } elsif ($v eq 'SOURCE') {
1253                 $v = $param->{source};
1254                 $param_used->{source} = 1;
1255             }
1256
1257             if (!defined($v)) {
1258                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1259                 raise_param_exc({ macro => $msg }) if $verify;
1260                 die "$msg\n";
1261             }
1262             $rule->{$k} = $v;
1263         }
1264         foreach my $k (keys %$param) {
1265             next if $k eq 'macro';
1266             next if !defined($param->{$k});
1267             next if $param_used->{$k};
1268             if (defined($rule->{$k})) {
1269                 if ($rule->{$k} ne $param->{$k}) {
1270                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1271                     raise_param_exc({ $k => $msg }) if $verify;
1272                     die "$msg\n";
1273                 }
1274             } else {
1275                 $rule->{$k} = $param->{$k};
1276             }
1277         }
1278         push @$rules, $rule;
1279     }
1280
1281     return $rules;
1282 };
1283
1284 my $rule_env_iface_lookup = {
1285     'ct' => 1,
1286     'vm' => 1,
1287     'group' => 0,
1288     'cluster' => 1,
1289     'host' => 1,
1290 };
1291
1292 sub verify_rule {
1293     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1294
1295     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1296
1297     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1298     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1299
1300     my $errors = $rule->{errors} || {};
1301
1302     my $error_count = 0;
1303
1304     my $add_error = sub {
1305         my ($param, $msg)  = @_;
1306         chomp $msg;
1307         raise_param_exc({ $param => $msg }) if !$noerr;
1308         $error_count++;
1309         $errors->{$param} = $msg if !$errors->{$param};
1310     };
1311
1312     my $ipversion;
1313     my $set_ip_version = sub {
1314         my $vers = shift;
1315         if ($vers) {
1316             die "detected mixed ipv4/ipv6 adresses in rule\n"
1317                 if $ipversion && ($vers != $ipversion);
1318             $ipversion = $vers;
1319         }
1320     };
1321
1322     my $check_ipset_or_alias_property = sub {
1323         my ($name, $expected_ipversion) = @_;
1324
1325         if (my $value = $rule->{$name}) {
1326             if ($value =~ m/^\+/) {
1327                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1328                     &$add_error($name, "no such ipset '$1'")
1329                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1330
1331                 } else {
1332                     &$add_error($name, "invalid ipset name '$value'");
1333                 }
1334             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1335                 my $alias = lc($value);
1336                 &$add_error($name, "no such alias '$value'")
1337                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1338                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1339                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1340
1341                 &$set_ip_version($e->{ipversion});
1342             }
1343         }
1344     };
1345
1346     my $type = $rule->{type};
1347     my $action = $rule->{action};
1348
1349     &$add_error('type', "missing property") if !$type;
1350     &$add_error('action', "missing property") if !$action;
1351
1352     if ($type) {
1353         if ($type eq  'in' || $type eq 'out') {
1354             &$add_error('action', "unknown action '$action'")
1355                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1356         } elsif ($type eq 'group') {
1357             &$add_error('type', "security groups not allowed")
1358                 if !$allow_groups;
1359             &$add_error('action', "invalid characters in security group name")
1360                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1361         } else {
1362             &$add_error('type', "unknown rule type '$type'");
1363         }
1364     }
1365
1366     if ($rule->{iface}) {
1367         &$add_error('type', "parameter -i not allowed for this rule type")
1368             if !$allow_iface;
1369         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1370         &$add_error('iface', $@) if $@;
1371         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1372             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1373                 if $rule->{iface} !~  m/^net(\d+)$/;
1374         }
1375     }
1376
1377     if ($rule->{macro}) {
1378         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1379             $rule->{macro} = $preferred_name;
1380         } else {
1381             &$add_error('macro', "unknown macro '$rule->{macro}'");
1382         }
1383     }
1384
1385     if ($rule->{proto}) {
1386         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1387         &$add_error('proto', $@) if $@;
1388         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1389         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1390     }
1391
1392     if ($rule->{dport}) {
1393         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1394         &$add_error('dport', $@) if $@;
1395         &$add_error('proto', "missing property - 'dport' requires this property")
1396             if !$rule->{proto};
1397     }
1398
1399     if ($rule->{sport}) {
1400         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1401         &$add_error('sport', $@) if $@;
1402         &$add_error('proto', "missing property - 'sport' requires this property")
1403             if !$rule->{proto};
1404     }
1405
1406     if ($rule->{source}) {
1407         eval {
1408             my $source_ipversion = parse_address_list($rule->{source});
1409             &$set_ip_version($source_ipversion);
1410         };
1411         &$add_error('source', $@) if $@;
1412         &$check_ipset_or_alias_property('source', $ipversion);
1413     }
1414
1415     if ($rule->{dest}) {
1416         eval {
1417             my $dest_ipversion = parse_address_list($rule->{dest});
1418             &$set_ip_version($dest_ipversion);
1419         };
1420         &$add_error('dest', $@) if $@;
1421         &$check_ipset_or_alias_property('dest', $ipversion);
1422     }
1423
1424     $rule->{ipversion} = $ipversion if $ipversion;
1425
1426     if ($rule->{macro} && !$error_count) {
1427         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1428         if (my $err = $@) {
1429             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1430                 my $eh = $err->{errors};
1431                 foreach my $p (keys %$eh) {
1432                     &$add_error($p, $eh->{$p});
1433                 }
1434             } else {
1435                 &$add_error('macro', "$err");
1436             }
1437         }
1438     }
1439
1440     $rule->{errors} = $errors if $error_count;
1441
1442     return $rule;
1443 }
1444
1445 sub copy_rule_data {
1446     my ($rule, $param) = @_;
1447
1448     foreach my $k (keys %$rule_properties) {
1449         if (defined(my $v = $param->{$k})) {
1450             if ($v eq '' || $v eq '-') {
1451                 delete $rule->{$k};
1452             } else {
1453                 $rule->{$k} = $v;
1454             }
1455         }
1456     }
1457
1458     return $rule;
1459 }
1460
1461 sub rules_modify_permissions {
1462     my ($rule_env) = @_;
1463
1464     if ($rule_env eq 'host') {
1465         return {
1466             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1467         };
1468     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1469         return {
1470             check => ['perm', '/', [ 'Sys.Modify' ]],
1471         };
1472     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1473         return {
1474             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1475         }
1476     }
1477
1478     return undef;
1479 }
1480
1481 sub rules_audit_permissions {
1482     my ($rule_env) = @_;
1483
1484     if ($rule_env eq 'host') {
1485         return {
1486             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1487         };
1488     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1489         return {
1490             check => ['perm', '/', [ 'Sys.Audit' ]],
1491         };
1492     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1493         return {
1494             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1495         }
1496     }
1497
1498     return undef;
1499 }
1500
1501 # core functions
1502 my $bridge_firewall_enabled = 0;
1503
1504 sub enable_bridge_firewall {
1505
1506     return if $bridge_firewall_enabled; # only once
1507
1508     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1509     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1510
1511     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1512     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1513
1514     $bridge_firewall_enabled = 1;
1515 }
1516
1517 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1518
1519 sub iptables_restore_cmdlist {
1520     my ($cmdlist) = @_;
1521
1522     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1523 }
1524
1525 sub ip6tables_restore_cmdlist {
1526     my ($cmdlist) = @_;
1527
1528     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1529 }
1530
1531 sub ipset_restore_cmdlist {
1532     my ($cmdlist) = @_;
1533
1534     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1535 }
1536
1537 sub iptables_get_chains {
1538     my ($iptablescmd) = @_;
1539
1540     $iptablescmd = "iptables" if !$iptablescmd;
1541
1542     my $res = {};
1543
1544     # check what chains we want to track
1545     my $is_pvefw_chain = sub {
1546         my $name = shift;
1547
1548         return 1 if $name =~ m/^PVEFW-\S+$/;
1549
1550         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1551
1552         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1553
1554         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1555         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1556
1557         return undef;
1558     };
1559
1560     my $table = '';
1561
1562     my $hooks = {};
1563
1564     my $parser = sub {
1565         my $line = shift;
1566
1567         return if $line =~ m/^#/;
1568         return if $line =~ m/^\s*$/;
1569
1570         if ($line =~ m/^\*(\S+)$/) {
1571             $table = $1;
1572             return;
1573         }
1574
1575         return if $table ne 'filter';
1576
1577         if ($line =~ m/^:(\S+)\s/) {
1578             my $chain = $1;
1579             return if !&$is_pvefw_chain($chain);
1580             $res->{$chain} = "unknown";
1581         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1582             my ($chain, $sig) = ($1, $2);
1583             return if !&$is_pvefw_chain($chain);
1584             $res->{$chain} = $sig;
1585         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1586             $hooks->{$1} = 1;
1587         } else {
1588             # simply ignore the rest
1589             return;
1590         }
1591     };
1592
1593     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1594
1595     return wantarray ? ($res, $hooks) : $res;
1596 }
1597
1598 sub iptables_chain_digest {
1599     my ($rules) = @_;
1600     my $digest = Digest::SHA->new('sha1');
1601     foreach my $rule (@$rules) { # order is important
1602         $digest->add($rule);
1603     }
1604     return $digest->b64digest;
1605 }
1606
1607 sub ipset_chain_digest {
1608     my ($rules) = @_;
1609
1610     my $digest = Digest::SHA->new('sha1');
1611     foreach my $rule (sort @$rules) { # note: sorted
1612         $digest->add($rule);
1613     }
1614     return $digest->b64digest;
1615 }
1616
1617 sub ipset_get_chains {
1618
1619     my $res = {};
1620     my $chains = {};
1621
1622     my $parser = sub {
1623         my $line = shift;
1624
1625         return if $line =~ m/^#/;
1626         return if $line =~ m/^\s*$/;
1627         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1628             my $chain = $1;
1629             $line =~ s/\s+$//; # delete trailing white space
1630             push @{$chains->{$chain}}, $line;
1631         } else {
1632             # simply ignore the rest
1633             return;
1634         }
1635     };
1636
1637     run_command("/sbin/ipset save", outfunc => $parser);
1638
1639     # compute digest for each chain
1640     foreach my $chain (keys %$chains) {
1641         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1642     }
1643
1644     return $res;
1645 }
1646
1647 sub ruleset_generate_cmdstr {
1648     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1649
1650     return if defined($rule->{enable}) && !$rule->{enable};
1651     return if $rule->{errors};
1652
1653     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1654
1655     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1656     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1657
1658     my @cmd = ();
1659
1660     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1661     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1662
1663     my $source = $rule->{source};
1664     my $dest = $rule->{dest};
1665
1666     if ($source) {
1667         if ($source =~ m/^\+/) {
1668             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1669                 my $name = $1;
1670                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1671                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1672                     push @cmd, "-m set --match-set ${ipset_chain} src";
1673                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1674                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1675                     push @cmd, "-m set --match-set ${ipset_chain} src";
1676                 } else {
1677                     die "no such ipset '$name'\n";
1678                 }
1679             } else {
1680                 die "invalid security group name '$source'\n";
1681             }
1682         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1683             my $alias = lc($source);
1684             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1685             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1686             die "no such alias '$source'\n" if !$e;
1687             push @cmd, "-s $e->{cidr}";
1688         } elsif ($source =~ m/\-/){
1689             push @cmd, "-m iprange --src-range $source";
1690         } else {
1691             push @cmd, "-s $source";
1692         }
1693     }
1694
1695     if ($dest) {
1696         if ($dest =~ m/^\+/) {
1697             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1698                 my $name = $1;
1699                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1700                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1701                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1702                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1703                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1704                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1705                 } else {
1706                     die "no such ipset '$name'\n";
1707                 }
1708             } else {
1709                 die "invalid security group name '$dest'\n";
1710             }
1711         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1712             my $alias = lc($dest);
1713             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1714             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1715             die "no such alias '$dest'\n" if !$e;
1716             push @cmd, "-d $e->{cidr}";
1717         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1718             push @cmd, "-m iprange --dst-range $dest";
1719         } else {
1720             push @cmd, "-d $dest";
1721         }
1722     }
1723
1724     if ($rule->{proto}) {
1725         push @cmd, "-p $rule->{proto}";
1726
1727         my $multiport = 0;
1728         $multiport++ if $nbdport > 1;
1729         $multiport++ if $nbsport > 1;
1730
1731         push @cmd, "--match multiport" if $multiport;
1732
1733         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1734             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1735
1736         if ($rule->{dport}) {
1737             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1738                 # Note: we use dport to store --icmp-type
1739                 die "unknown icmp-type '$rule->{dport}'\n"
1740                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1741                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1742             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1743                 # Note: we use dport to store --icmpv6-type
1744                 die "unknown icmpv6-type '$rule->{dport}'\n"
1745                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1746                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1747             } else {
1748                 if ($nbdport > 1) {
1749                     if ($multiport == 2) {
1750                         push @cmd,  "--ports $rule->{dport}";
1751                     } else {
1752                         push @cmd, "--dports $rule->{dport}";
1753                     }
1754                 } else {
1755                     push @cmd, "--dport $rule->{dport}";
1756                 }
1757             }
1758         }
1759
1760         if ($rule->{sport}) {
1761             if ($nbsport > 1) {
1762                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1763             } else {
1764                 push @cmd, "--sport $rule->{sport}";
1765             }
1766         }
1767     } elsif ($rule->{dport} || $rule->{sport}) {
1768         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1769         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1770     }
1771
1772     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1773
1774     if (my $action = $rule->{action}) {
1775         $action = $actions->{$action} if defined($actions->{$action});
1776         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1777         push @cmd, $goto ? "-g $action" : "-j $action";
1778     }
1779
1780     return scalar(@cmd) ? join(' ', @cmd) : undef;
1781 }
1782
1783 sub ruleset_generate_rule {
1784     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1785
1786     my $rules;
1787
1788     if ($rule->{macro}) {
1789         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1790     } else {
1791         $rules = [ $rule ];
1792     }
1793
1794     # update all or nothing
1795
1796     my @cmds = ();
1797     foreach my $tmp (@$rules) {
1798         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1799             push @cmds, $cmdstr;
1800         }
1801     }
1802
1803     foreach my $cmdstr (@cmds) {
1804         ruleset_addrule($ruleset, $chain, $cmdstr);
1805     }
1806 }
1807
1808 sub ruleset_generate_rule_insert {
1809     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1810
1811     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1812
1813     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1814         ruleset_insertrule($ruleset, $chain, $cmdstr);
1815     }
1816 }
1817
1818 sub ruleset_create_chain {
1819     my ($ruleset, $chain) = @_;
1820
1821     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1822     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1823
1824     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1825
1826     $ruleset->{$chain} = [];
1827 }
1828
1829 sub ruleset_chain_exist {
1830     my ($ruleset, $chain) = @_;
1831
1832     return $ruleset->{$chain} ? 1 : undef;
1833 }
1834
1835 sub ruleset_addrule {
1836    my ($ruleset, $chain, $rule) = @_;
1837
1838    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1839
1840    push @{$ruleset->{$chain}}, "-A $chain $rule";
1841 }
1842
1843 sub ruleset_insertrule {
1844    my ($ruleset, $chain, $rule) = @_;
1845
1846    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1847
1848    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1849 }
1850
1851 sub get_log_rule_base {
1852     my ($chain, $vmid, $msg, $loglevel) = @_;
1853
1854     die "internal error - no log level" if !defined($loglevel);
1855
1856     $vmid = 0 if !defined($vmid);
1857
1858     # Note: we use special format for prefix to pass further
1859     # info to log daemon (VMID, LOGVELEL and CHAIN)
1860
1861     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1862 }
1863
1864 sub ruleset_addlog {
1865     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1866
1867     return if !defined($loglevel);
1868
1869     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1870
1871     $logrule = "$rule $logrule" if defined($rule);
1872
1873     ruleset_addrule($ruleset, $chain, $logrule);
1874 }
1875
1876 sub ruleset_add_chain_policy {
1877     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1878
1879     if ($policy eq 'ACCEPT') {
1880
1881         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1882                               { ACCEPT =>  $accept_action});
1883
1884     } elsif ($policy eq 'DROP') {
1885
1886         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1887
1888         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1889
1890         ruleset_addrule($ruleset, $chain, "-j DROP");
1891     } elsif ($policy eq 'REJECT') {
1892         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1893
1894         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1895
1896         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1897     } else {
1898         # should not happen
1899         die "internal error: unknown policy '$policy'";
1900     }
1901 }
1902
1903 sub ruleset_chain_add_ndp {
1904     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
1905     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1906
1907     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
1908     if ($direction ne 'OUT' || $options->{radv}) {
1909         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
1910     }
1911     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
1912     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
1913 }
1914
1915 sub ruleset_chain_add_conn_filters {
1916     my ($ruleset, $chain, $accept) = @_;
1917
1918     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1919     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1920 }
1921
1922 sub ruleset_chain_add_input_filters {
1923     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1924
1925     if ($cluster_conf->{ipset}->{blacklist}){
1926         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1927             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1928             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1929             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1930         }
1931         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1932         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1933     }
1934
1935     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1936         if ($ipversion == 4) {
1937             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1938         }
1939     }
1940
1941     if ($options->{tcpflags}) {
1942         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1943     }
1944 }
1945
1946 sub ruleset_create_vm_chain {
1947     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1948
1949     ruleset_create_chain($ruleset, $chain);
1950     my $accept = generate_nfqueue($options);
1951
1952     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1953         if ($ipversion == 4) {
1954             if ($direction eq 'OUT') {
1955                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1956                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1957                                         proto => 'udp', sport => 68, dport => 67 });
1958             } else {
1959                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1960                                       { action => 'ACCEPT',
1961                                         proto => 'udp', sport => 67, dport => 68 });
1962             }
1963         } elsif ($ipversion == 6) {
1964             if ($direction eq 'OUT') {
1965                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1966                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1967                                         proto => 'udp', sport => 546, dport => 547 });
1968             } else {
1969                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1970                                       { action => 'ACCEPT',
1971                                         proto => 'udp', sport => 547, dport => 546 });
1972             }
1973         }
1974
1975     }
1976
1977     if ($direction eq 'OUT') {
1978         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1979             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1980         }
1981         if ($ipversion == 6 && !$options->{radv}) {
1982             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1983         }
1984         if ($ipfilter_ipset) {
1985             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1986         }
1987         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
1988     }
1989
1990     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
1991     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
1992 }
1993
1994 sub ruleset_add_group_rule {
1995     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1996
1997     my $group = $rule->{action};
1998     my $group_chain = "GROUP-$group-$direction";
1999     if(!ruleset_chain_exist($ruleset, $group_chain)){
2000         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2001     }
2002
2003     if ($direction eq 'OUT' && $rule->{iface_out}) {
2004         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2005     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2006         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2007     } else {
2008         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2009     }
2010
2011     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2012 }
2013
2014 sub ruleset_generate_vm_rules {
2015     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2016
2017     my $lc_direction = lc($direction);
2018
2019     my $in_accept = generate_nfqueue($options);
2020
2021     foreach my $rule (@$rules) {
2022         next if $rule->{iface} && $rule->{iface} ne $netid;
2023         next if !$rule->{enable} || $rule->{errors};
2024         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2025
2026         if ($rule->{type} eq 'group') {
2027             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2028                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2029         } else {
2030             next if $rule->{type} ne $lc_direction;
2031             eval {
2032                 if ($direction eq 'OUT') {
2033                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2034                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2035                                           undef, $cluster_conf, $vmfw_conf);
2036                 } else {
2037                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2038                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2039                                           undef, $cluster_conf, $vmfw_conf);
2040                 }
2041             };
2042             warn $@ if $@;
2043         }
2044     }
2045 }
2046
2047 sub generate_nfqueue {
2048     my ($options) = @_;
2049
2050     if ($options->{ips}) {
2051         my $action = "NFQUEUE";
2052         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2053             if (defined($3) && defined($1)) {
2054                 $action .= " --queue-balance $1:$3";
2055             } elsif (defined($1)) {
2056                 $action .= " --queue-num $1";
2057             }
2058         }
2059         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2060         return $action;
2061     } else {
2062         return "ACCEPT";
2063     }
2064 }
2065
2066 sub ruleset_generate_vm_ipsrules {
2067     my ($ruleset, $options, $direction, $iface) = @_;
2068
2069     if ($options->{ips} && $direction eq 'IN') {
2070         my $nfqueue = generate_nfqueue($options);
2071
2072         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2073             ruleset_create_chain($ruleset, "PVEFW-IPS");
2074         }
2075
2076         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2077     }
2078 }
2079
2080 sub generate_tap_rules_direction {
2081     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2082
2083     my $lc_direction = lc($direction);
2084
2085     my $rules = $vmfw_conf->{rules};
2086
2087     my $options = $vmfw_conf->{options};
2088     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2089
2090     my $tapchain = "$iface-$direction";
2091
2092     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2093     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2094         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2095
2096     # create chain with mac and ip filter
2097     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2098
2099     if ($options->{enable}) {
2100         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2101
2102         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2103
2104         # implement policy
2105         my $policy;
2106
2107         if ($direction eq 'OUT') {
2108             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2109         } else {
2110         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2111         }
2112
2113         my $accept = generate_nfqueue($options);
2114         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2115         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2116     } else {
2117         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2118         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2119     }
2120
2121     # plug the tap chain to bridge chain
2122     if ($direction eq 'IN') {
2123         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2124                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2125     } else {
2126         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2127                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2128     }
2129 }
2130
2131 sub enable_host_firewall {
2132     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2133
2134     my $options = $hostfw_conf->{options};
2135     my $cluster_options = $cluster_conf->{options};
2136     my $rules = $hostfw_conf->{rules};
2137     my $cluster_rules = $cluster_conf->{rules};
2138
2139     # host inbound firewall
2140     my $chain = "PVEFW-HOST-IN";
2141     ruleset_create_chain($ruleset, $chain);
2142
2143     my $loglevel = get_option_log_level($options, "log_level_in");
2144
2145     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2146
2147     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2148     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2149     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2150
2151     # we use RETURN because we need to check also tap rules
2152     my $accept_action = 'RETURN';
2153
2154     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2155
2156     # add host rules first, so that cluster wide rules can be overwritten
2157     foreach my $rule (@$rules, @$cluster_rules) {
2158         next if !$rule->{enable} || $rule->{errors};
2159         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2160
2161         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2162
2163         eval {
2164             if ($rule->{type} eq 'group') {
2165                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2166             } elsif ($rule->{type} eq 'in') {
2167                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2168                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2169                                       undef, $cluster_conf, $hostfw_conf);
2170             }
2171         };
2172         warn $@ if $@;
2173         delete $rule->{iface_in};
2174     }
2175
2176     # allow standard traffic for management ipset (includes cluster network)
2177     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2178     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2179     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2180     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2181     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2182     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2183
2184     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2185     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2186
2187     # corosync
2188     if ($localnet && ($ipversion == $localnet_ver)) {
2189         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2190         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2191         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2192     }
2193
2194     # implement input policy
2195     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2196     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2197
2198     # host outbound firewall
2199     $chain = "PVEFW-HOST-OUT";
2200     ruleset_create_chain($ruleset, $chain);
2201
2202     $loglevel = get_option_log_level($options, "log_level_out");
2203
2204     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2205
2206     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2207
2208     # we use RETURN because we may want to check other thigs later
2209     $accept_action = 'RETURN';
2210     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2211
2212     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2213
2214     # add host rules first, so that cluster wide rules can be overwritten
2215     foreach my $rule (@$rules, @$cluster_rules) {
2216         next if !$rule->{enable} || $rule->{errors};
2217         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2218
2219         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2220         eval {
2221             if ($rule->{type} eq 'group') {
2222                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2223             } elsif ($rule->{type} eq 'out') {
2224                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2225                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2226                                       undef, $cluster_conf, $hostfw_conf);
2227             }
2228         };
2229         warn $@ if $@;
2230         delete $rule->{iface_out};
2231     }
2232
2233     # allow standard traffic on cluster network
2234     if ($localnet && ($ipversion == $localnet_ver)) {
2235         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2236         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2237         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2238         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2239
2240         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2241         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2242         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2243     }
2244
2245     # implement output policy
2246     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2247     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2248
2249     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2250     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2251 }
2252
2253 sub generate_group_rules {
2254     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2255
2256     my $rules = $cluster_conf->{groups}->{$group};
2257
2258     if (!$rules) {
2259         warn "no such security group '$group'\n";
2260         $rules = []; # create empty chain
2261     }
2262
2263     my $chain = "GROUP-${group}-IN";
2264
2265     ruleset_create_chain($ruleset, $chain);
2266     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2267
2268     foreach my $rule (@$rules) {
2269         next if $rule->{type} ne 'in';
2270         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2271         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2272                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2273                               undef, $cluster_conf);
2274     }
2275
2276     $chain = "GROUP-${group}-OUT";
2277
2278     ruleset_create_chain($ruleset, $chain);
2279     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2280
2281     foreach my $rule (@$rules) {
2282         next if $rule->{type} ne 'out';
2283         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2284         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2285         # check also other tap rules later
2286         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2287                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2288                               undef, $cluster_conf);
2289     }
2290 }
2291
2292 my $MAX_NETS = 32;
2293 my $valid_netdev_names = {};
2294 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2295     $valid_netdev_names->{"net$i"} = 1;
2296 }
2297
2298 sub get_mark_values {
2299     my ($value, $mask) = @_;
2300     $value = hex($value) if $value =~ /^0x/;
2301     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2302     $mask = 0xffffffff if !defined($mask);
2303     return ($value, $mask);
2304 }
2305
2306 sub parse_fw_rule {
2307     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2308
2309     my $orig_line = $line;
2310
2311     my $rule = {};
2312
2313     # we can add single line comments to the end of the rule
2314     if ($line =~ s/#\s*(.*?)\s*$//) {
2315         $rule->{comment} = decode('utf8', $1);
2316     }
2317
2318     # we can disable a rule when prefixed with '|'
2319
2320     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2321
2322     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2323         die "unable to parse rule: $line\n";
2324
2325     $rule->{type} = lc($1);
2326     $rule->{action} = $2;
2327
2328     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2329         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2330             $rule->{macro} = $1;
2331             $rule->{action} = $2;
2332         }
2333     }
2334
2335     while (length($line)) {
2336         if ($line =~ s/^-i (\S+)\s*//) {
2337             $rule->{iface} = $1;
2338             next;
2339         }
2340
2341         last if $rule->{type} eq 'group';
2342
2343         if ($line =~ s/^-p (\S+)\s*//) {
2344             $rule->{proto} = $1;
2345             next;
2346         }
2347
2348         if ($line =~ s/^-dport (\S+)\s*//) {
2349             $rule->{dport} = $1;
2350             next;
2351         }
2352
2353         if ($line =~ s/^-sport (\S+)\s*//) {
2354             $rule->{sport} = $1;
2355             next;
2356         }
2357         if ($line =~ s/^-source (\S+)\s*//) {
2358             $rule->{source} = $1;
2359             next;
2360         }
2361         if ($line =~ s/^-dest (\S+)\s*//) {
2362             $rule->{dest} = $1;
2363             next;
2364         }
2365
2366         last;
2367     }
2368
2369     die "unable to parse rule parameters: $line\n" if length($line);
2370
2371     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2372     if ($verbose && $rule->{errors}) {
2373         warn "$prefix - errors in rule parameters: $orig_line\n";
2374         foreach my $p (keys %{$rule->{errors}}) {
2375             warn "  $p: $rule->{errors}->{$p}\n";
2376         }
2377     }
2378
2379     return $rule;
2380 }
2381
2382 sub parse_vmfw_option {
2383     my ($line) = @_;
2384
2385     my ($opt, $value);
2386
2387     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2388
2389     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2390         $opt = lc($1);
2391         $value = int($2);
2392     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2393         $opt = lc($1);
2394         $value = $2 ? lc($3) : '';
2395     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2396         $opt = lc($1);
2397         $value = uc($3);
2398     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2399         $opt = lc($1);
2400         $value = $2;
2401     } else {
2402         die "can't parse option '$line'\n"
2403     }
2404
2405     return ($opt, $value);
2406 }
2407
2408 sub parse_hostfw_option {
2409     my ($line) = @_;
2410
2411     my ($opt, $value);
2412
2413     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2414
2415     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2416         $opt = lc($1);
2417         $value = int($2);
2418     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2419         $opt = lc($1);
2420         $value = $2 ? lc($3) : '';
2421     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2422         $opt = lc($1);
2423         $value = int($2);
2424     } else {
2425         die "can't parse option '$line'\n"
2426     }
2427
2428     return ($opt, $value);
2429 }
2430
2431 sub parse_clusterfw_option {
2432     my ($line) = @_;
2433
2434     my ($opt, $value);
2435
2436     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2437         $opt = lc($1);
2438         $value = int($2);
2439         if (($value > 1) && ((time() - $value) > 60)) {
2440             $value = 0
2441         }
2442     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2443         $opt = lc($1);
2444         $value = uc($3);
2445     } else {
2446         die "can't parse option '$line'\n"
2447     }
2448
2449     return ($opt, $value);
2450 }
2451
2452 sub resolve_alias {
2453     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2454
2455     my $alias = lc($cidr);
2456     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2457     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2458
2459     die "no such alias '$cidr'\n" if !$e;;
2460
2461     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2462 }
2463
2464 sub parse_ip_or_cidr {
2465     my ($cidr) = @_;
2466
2467     my $ipversion;
2468
2469     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2470         $cidr =~ s|/128$||;
2471         $ipversion = 6;
2472     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2473         $cidr =~ s|/32$||;
2474         $ipversion = 4;
2475     } else {
2476         die "value does not look like a valid IP address or CIDR network\n";
2477     }
2478
2479     return wantarray ? ($cidr, $ipversion) : $cidr;
2480 }
2481
2482 sub parse_alias {
2483     my ($line) = @_;
2484
2485     # we can add single line comments to the end of the line
2486     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2487
2488     if ($line =~ m/^(\S+)\s(\S+)$/) {
2489         my ($name, $cidr) = ($1, $2);
2490         my $ipversion;
2491
2492         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2493
2494         my $data = {
2495             name => $name,
2496             cidr => $cidr,
2497             ipversion => $ipversion,
2498         };
2499         $data->{comment} = $comment  if $comment;
2500         return $data;
2501     }
2502
2503     return undef;
2504 }
2505
2506 sub generic_fw_config_parser {
2507     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2508
2509     my $section;
2510     my $group;
2511
2512     my $res = $empty_conf;
2513
2514     while (defined(my $line = <$fh>)) {
2515         next if $line =~ m/^#/;
2516         next if $line =~ m/^\s*$/;
2517
2518         chomp $line;
2519
2520         my $linenr = $fh->input_line_number();
2521         my $prefix = "$filename (line $linenr)";
2522
2523         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2524             $section = 'options';
2525             next;
2526         }
2527
2528         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2529             $section = 'aliases';
2530             next;
2531         }
2532
2533         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2534             $section = 'groups';
2535             $group = lc($1);
2536             my $comment = $2;
2537             eval {
2538                 die "security group name too long\n" if length($group) > $max_group_name_length;
2539                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2540             };
2541             if (my $err = $@) {
2542                 ($section, $group, $comment) = undef;
2543                 warn "$prefix: $err";
2544                 next;
2545             }
2546
2547             $res->{$section}->{$group} = [];
2548             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2549                 if $comment;
2550             next;
2551         }
2552
2553         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2554             $section = 'rules';
2555             next;
2556         }
2557
2558         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2559             $section = 'ipset';
2560             $group = lc($1);
2561             my $comment = $2;
2562             eval {
2563                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2564                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2565             };
2566             if (my $err = $@) {
2567                 ($section, $group, $comment) = undef;
2568                 warn "$prefix: $err";
2569                 next;
2570             }
2571
2572             $res->{$section}->{$group} = [];
2573             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2574                 if $comment;
2575             next;
2576         }
2577
2578         if (!$section) {
2579             warn "$prefix: skip line - no section\n";
2580             next;
2581         }
2582
2583         if ($section eq 'options') {
2584             eval {
2585                 my ($opt, $value);
2586                 if ($rule_env eq 'cluster') {
2587                     ($opt, $value) = parse_clusterfw_option($line);
2588                 } elsif ($rule_env eq 'host') {
2589                     ($opt, $value) = parse_hostfw_option($line);
2590                 } else {
2591                     ($opt, $value) = parse_vmfw_option($line);
2592                 }
2593                 $res->{options}->{$opt} = $value;
2594             };
2595             warn "$prefix: $@" if $@;
2596         } elsif ($section eq 'aliases') {
2597             eval {
2598                 my $data = parse_alias($line);
2599                 $res->{aliases}->{lc($data->{name})} = $data;
2600             };
2601             warn "$prefix: $@" if $@;
2602         } elsif ($section eq 'rules') {
2603             my $rule;
2604             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2605             if (my $err = $@) {
2606                 warn "$prefix: $err";
2607                 next;
2608             }
2609             push @{$res->{$section}}, $rule;
2610         } elsif ($section eq 'groups') {
2611             my $rule;
2612             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2613             if (my $err = $@) {
2614                 warn "$prefix: $err";
2615                 next;
2616             }
2617             push @{$res->{$section}->{$group}}, $rule;
2618         } elsif ($section eq 'ipset') {
2619             # we can add single line comments to the end of the rule
2620             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2621
2622             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2623             my $nomatch = $1;
2624             my $cidr = $2;
2625             my $errors;
2626
2627             if ($nomatch && !$feature_ipset_nomatch) {
2628                 $errors->{nomatch} = "nomatch not supported by kernel";
2629             }
2630
2631             eval {
2632                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2633                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2634                 } else {
2635                     $cidr = parse_ip_or_cidr($cidr);
2636                 }
2637             };
2638             if (my $err = $@) {
2639                 chomp $err;
2640                 $errors->{cidr} = $err;
2641             }
2642
2643             my $entry = { cidr => $cidr };
2644             $entry->{nomatch} = 1 if $nomatch;
2645             $entry->{comment} = $comment if $comment;
2646             $entry->{errors} =  $errors if $errors;
2647
2648             if ($verbose && $errors) {
2649                 warn "$prefix - errors in ipset '$group': $line\n";
2650                 foreach my $p (keys %{$errors}) {
2651                     warn "  $p: $errors->{$p}\n";
2652                 }
2653             }
2654
2655             push @{$res->{$section}->{$group}}, $entry;
2656         } else {
2657             warn "$prefix: skip line - unknown section\n";
2658             next;
2659         }
2660     }
2661
2662     return $res;
2663 }
2664
2665 sub parse_hostfw_config {
2666     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2667
2668     my $empty_conf = { rules => [], options => {}};
2669
2670     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2671 }
2672
2673 sub parse_vmfw_config {
2674     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2675
2676     my $empty_conf = {
2677         rules => [],
2678         options => {},
2679         aliases => {},
2680         ipset => {} ,
2681         ipset_comments => {},
2682     };
2683
2684     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2685 }
2686
2687 sub parse_clusterfw_config {
2688     my ($filename, $fh, $verbose) = @_;
2689
2690     my $section;
2691     my $group;
2692
2693     my $empty_conf = {
2694         rules => [],
2695         options => {},
2696         aliases => {},
2697         groups => {},
2698         group_comments => {},
2699         ipset => {} ,
2700         ipset_comments => {},
2701     };
2702
2703     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2704 }
2705
2706 sub run_locked {
2707     my ($code, @param) = @_;
2708
2709     my $timeout = 10;
2710
2711     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2712
2713     die $@ if $@;
2714
2715     return $res;
2716 }
2717
2718 sub read_local_vm_config {
2719
2720     my $qemu = {};
2721     my $lxc = {};
2722
2723     my $vmdata = { qemu => $qemu, lxc => $lxc };
2724
2725     my $vmlist = PVE::Cluster::get_vmlist();
2726     return $vmdata if !$vmlist || !$vmlist->{ids};
2727     my $ids = $vmlist->{ids};
2728
2729     foreach my $vmid (keys %$ids) {
2730         next if !$vmid; # skip VE0
2731         my $d = $ids->{$vmid};
2732         next if !$d->{node} || $d->{node} ne $nodename;
2733         next if !$d->{type};
2734         if ($d->{type} eq 'qemu') {
2735             if ($have_qemu_server) {
2736                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2737                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2738                     $qemu->{$vmid} = $conf;
2739                 }
2740             }
2741         } elsif ($d->{type} eq 'lxc') {
2742             if ($have_lxc) {
2743                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2744                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2745                     $lxc->{$vmid} = $conf;
2746                 }
2747             }
2748         }
2749     }
2750
2751     return $vmdata;
2752 };
2753
2754 sub load_vmfw_conf {
2755     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2756
2757     my $vmfw_conf = {};
2758
2759     $dir = $pvefw_conf_dir if !defined($dir);
2760
2761     my $filename = "$dir/$vmid.fw";
2762     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2763         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2764         $vmfw_conf->{vmid} = $vmid;
2765     }
2766
2767     return $vmfw_conf;
2768 }
2769
2770 my $format_rules = sub {
2771     my ($rules, $allow_iface) = @_;
2772
2773     my $raw = '';
2774
2775     foreach my $rule (@$rules) {
2776         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2777             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2778             $raw .= uc($rule->{type});
2779             if ($rule->{macro}) {
2780                 $raw .= " $rule->{macro}($rule->{action})";
2781             } else {
2782                 $raw .= " " . $rule->{action};
2783             }
2784             if ($allow_iface && $rule->{iface}) {
2785                 $raw .= " -i $rule->{iface}";
2786             }
2787
2788             if ($rule->{type} ne  'group')  {
2789                 $raw .= " -source $rule->{source}" if $rule->{source};
2790                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2791                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2792                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2793                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2794             }
2795
2796             $raw .= " # " . encode('utf8', $rule->{comment})
2797                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2798             $raw .= "\n";
2799         } else {
2800             die "unknown rule type '$rule->{type}'";
2801         }
2802     }
2803
2804     return $raw;
2805 };
2806
2807 my $format_options = sub {
2808     my ($options) = @_;
2809
2810     my $raw = '';
2811
2812     $raw .= "[OPTIONS]\n\n";
2813     foreach my $opt (keys %$options) {
2814         $raw .= "$opt: $options->{$opt}\n";
2815     }
2816     $raw .= "\n";
2817
2818     return $raw;
2819 };
2820
2821 my $format_aliases = sub {
2822     my ($aliases) = @_;
2823
2824     my $raw = '';
2825
2826     $raw .= "[ALIASES]\n\n";
2827     foreach my $k (keys %$aliases) {
2828         my $e = $aliases->{$k};
2829         $raw .= "$e->{name} $e->{cidr}";
2830         $raw .= " # " . encode('utf8', $e->{comment})
2831             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2832         $raw .= "\n";
2833     }
2834     $raw .= "\n";
2835
2836     return $raw;
2837 };
2838
2839 my $format_ipsets = sub {
2840     my ($fw_conf) = @_;
2841
2842     my $raw = '';
2843
2844     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2845         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2846             my $utf8comment = encode('utf8', $comment);
2847             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2848         } else {
2849             $raw .= "[IPSET $ipset]\n\n";
2850         }
2851         my $options = $fw_conf->{ipset}->{$ipset};
2852
2853         my $nethash = {};
2854         foreach my $entry (@$options) {
2855             $nethash->{$entry->{cidr}} = $entry;
2856         }
2857
2858         foreach my $cidr (sort keys %$nethash) {
2859             my $entry = $nethash->{$cidr};
2860             my $line = $entry->{nomatch} ? '!' : '';
2861             $line .= $entry->{cidr};
2862             $line .= " # " . encode('utf8', $entry->{comment})
2863                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2864             $raw .= "$line\n";
2865         }
2866
2867         $raw .= "\n";
2868     }
2869
2870     return $raw;
2871 };
2872
2873 sub save_vmfw_conf {
2874     my ($vmid, $vmfw_conf) = @_;
2875
2876     my $raw = '';
2877
2878     my $options = $vmfw_conf->{options};
2879     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2880
2881     my $aliases = $vmfw_conf->{aliases};
2882     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2883
2884     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2885
2886     my $rules = $vmfw_conf->{rules} || [];
2887     if ($rules && scalar(@$rules)) {
2888         $raw .= "[RULES]\n\n";
2889         $raw .= &$format_rules($rules, 1);
2890         $raw .= "\n";
2891     }
2892
2893     my $filename = "$pvefw_conf_dir/$vmid.fw";
2894     if ($raw) {
2895         mkdir $pvefw_conf_dir;
2896         PVE::Tools::file_set_contents($filename, $raw);
2897     } else {
2898         unlink $filename;
2899     }
2900 }
2901
2902 sub remove_vmfw_conf {
2903     my ($vmid) = @_;
2904
2905     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
2906
2907     unlink $vmfw_conffile;
2908 }
2909
2910 sub clone_vmfw_conf {
2911     my ($vmid, $newid) = @_;
2912
2913     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
2914     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
2915
2916     if (-f $clonevm_conffile) {
2917         unlink $clonevm_conffile;
2918     }
2919     if (-f $sourcevm_conffile) {
2920         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
2921         PVE::Tools::file_set_contents($clonevm_conffile, $data);
2922     }
2923 }
2924
2925 sub read_vm_firewall_configs {
2926     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2927
2928     my $vmfw_configs = {};
2929
2930     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2931         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2932         next if !$vmfw_conf->{options}; # skip if file does not exists
2933         $vmfw_configs->{$vmid} = $vmfw_conf;
2934     }
2935     foreach my $vmid (keys %{$vmdata->{lxc}}) {
2936         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2937         next if !$vmfw_conf->{options}; # skip if file does not exists
2938         $vmfw_configs->{$vmid} = $vmfw_conf;
2939     }
2940
2941     return $vmfw_configs;
2942 }
2943
2944 sub get_option_log_level {
2945     my ($options, $k) = @_;
2946
2947     my $v = $options->{$k};
2948     $v = $default_log_level if !defined($v);
2949
2950     return undef if $v eq '' || $v eq 'nolog';
2951
2952     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2953
2954     return $v if ($v >= 0) && ($v <= 7);
2955
2956     warn "unknown log level ($k = '$v')\n";
2957
2958     return undef;
2959 }
2960
2961 sub generate_std_chains {
2962     my ($ruleset, $options, $ipversion) = @_;
2963
2964     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2965
2966     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2967
2968     my $chain;
2969
2970     if ($ipversion == 4) {
2971         # same as shorewall smurflog.
2972         $chain = 'PVEFW-smurflog';
2973         $std_chains->{$chain} = [];
2974
2975         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2976         push @{$std_chains->{$chain}}, "-j DROP";
2977     }
2978
2979     # same as shorewall logflags action.
2980     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2981     $chain = 'PVEFW-logflags';
2982     $std_chains->{$chain} = [];
2983
2984     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2985     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2986     push @{$std_chains->{$chain}}, "-j DROP";
2987
2988     foreach my $chain (keys %$std_chains) {
2989         ruleset_create_chain($ruleset, $chain);
2990         foreach my $rule (@{$std_chains->{$chain}}) {
2991             if (ref($rule)) {
2992                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2993             } else {
2994                 ruleset_addrule($ruleset, $chain, $rule);
2995             }
2996         }
2997     }
2998 }
2999
3000 sub generate_ipset_chains {
3001     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3002
3003     foreach my $ipset (keys %{$ipsets}) {
3004
3005         my $options = $ipsets->{$ipset};
3006
3007         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3008             if (my $ips = $device_ips->{$1}) {
3009                 $options = [@$options, @$ips];
3010             }
3011         }
3012
3013         # remove duplicates
3014         my $nethash = {};
3015         foreach my $entry (@$options) {
3016             next if $entry->{errors}; # skip entries with errors
3017             eval {
3018                 my ($cidr, $ver);
3019                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3020                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3021                 } else {
3022                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3023                 }
3024                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3025                 if ($ver == 6) {
3026                     # ip_compress_address takes an address only, no CIDR
3027                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3028                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3029                     $cidr .= $prefix_len if defined($prefix_len);
3030                     $cidr =~ s|/128$||;
3031                 } else {
3032                     $cidr =~ s|/32$||;
3033                 }
3034
3035                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3036             };
3037             warn $@ if $@;
3038         }
3039
3040         foreach my $ipversion (4, 6) {
3041             my $data = $nethash->{$ipversion};
3042
3043             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3044
3045             my $hashsize = scalar(@$options);
3046             if ($hashsize <= 64) {
3047                 $hashsize = 64;
3048             } else {
3049                 $hashsize = round_powerof2($hashsize);
3050             }
3051
3052             my $family = $ipversion == "6" ? "inet6" : "inet";
3053
3054             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3055
3056             foreach my $cidr (sort keys %$data) {
3057                 my $entry = $data->{$cidr};
3058
3059                 my $cmd = "add $name $cidr";
3060                 if ($entry->{nomatch}) {
3061                     if ($feature_ipset_nomatch) {
3062                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3063                     } else {
3064                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3065                     }
3066                 } else {
3067                     push @{$ipset_ruleset->{$name}}, $cmd;
3068                 }
3069             }
3070         }
3071     }
3072 }
3073
3074 sub round_powerof2 {
3075     my ($int) = @_;
3076
3077     $int--;
3078     $int |= $int >> $_ foreach (1,2,4,8,16);
3079     return ++$int;
3080 }
3081
3082 sub load_clusterfw_conf {
3083     my ($filename, $verbose) = @_;
3084
3085     $filename = $clusterfw_conf_filename if !defined($filename);
3086
3087     my $cluster_conf = {};
3088     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3089         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3090     }
3091
3092     return $cluster_conf;
3093 }
3094
3095 sub save_clusterfw_conf {
3096     my ($cluster_conf) = @_;
3097
3098     my $raw = '';
3099
3100     my $options = $cluster_conf->{options};
3101     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3102
3103     my $aliases = $cluster_conf->{aliases};
3104     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3105
3106     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3107
3108     my $rules = $cluster_conf->{rules};
3109     if ($rules && scalar(@$rules)) {
3110         $raw .= "[RULES]\n\n";
3111         $raw .= &$format_rules($rules, 1);
3112         $raw .= "\n";
3113     }
3114
3115     if ($cluster_conf->{groups}) {
3116         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3117             my $rules = $cluster_conf->{groups}->{$group};
3118             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3119                 my $utf8comment = encode('utf8', $comment);
3120                 $raw .= "[group $group] # $utf8comment\n\n";
3121             } else {
3122                 $raw .= "[group $group]\n\n";
3123             }
3124
3125             $raw .= &$format_rules($rules, 0);
3126             $raw .= "\n";
3127         }
3128     }
3129
3130     if ($raw) {
3131         mkdir $pvefw_conf_dir;
3132         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3133     } else {
3134         unlink $clusterfw_conf_filename;
3135     }
3136 }
3137
3138 sub load_hostfw_conf {
3139     my ($cluster_conf, $filename, $verbose) = @_;
3140
3141     $filename = $hostfw_conf_filename if !defined($filename);
3142
3143     my $hostfw_conf = {};
3144     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3145         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3146     }
3147     return $hostfw_conf;
3148 }
3149
3150 sub save_hostfw_conf {
3151     my ($hostfw_conf) = @_;
3152
3153     my $raw = '';
3154
3155     my $options = $hostfw_conf->{options};
3156     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3157
3158     my $rules = $hostfw_conf->{rules};
3159     if ($rules && scalar(@$rules)) {
3160         $raw .= "[RULES]\n\n";
3161         $raw .= &$format_rules($rules, 1);
3162         $raw .= "\n";
3163     }
3164
3165     if ($raw) {
3166         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3167     } else {
3168         unlink $hostfw_conf_filename;
3169     }
3170 }
3171
3172 sub compile {
3173     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3174
3175     my $vmfw_configs;
3176
3177     if ($vmdata) { # test mode
3178         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3179         my $filename = "$testdir/cluster.fw";
3180         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3181
3182         $filename = "$testdir/host.fw";
3183         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3184
3185         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3186     } else { # normal operation
3187         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3188
3189         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3190
3191         $vmdata = read_local_vm_config();
3192         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3193     }
3194
3195     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3196
3197     my $localnet;
3198     if ($cluster_conf->{aliases}->{local_network}) {
3199         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3200     } else {
3201         my $localnet_ver;
3202         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3203
3204         $cluster_conf->{aliases}->{local_network} = {
3205             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3206     }
3207
3208     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3209
3210     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3211     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3212     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3213
3214     return ($ruleset, $ipset_ruleset, $rulesetv6);
3215 }
3216
3217 sub compile_iptables_filter {
3218     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3219
3220     my $ruleset = {};
3221
3222     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3223     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3224
3225     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3226
3227     my $hostfw_options = $hostfw_conf->{options} || {};
3228
3229     # fixme: what log level should we use here?
3230     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3231
3232     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3233
3234     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3235     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3236
3237     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3238
3239     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3240     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3241
3242     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3243
3244     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3245
3246     if ($hostfw_enable) {
3247         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3248         warn $@ if $@; # just to be sure - should not happen
3249     }
3250
3251     # generate firewall rules for QEMU VMs
3252     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3253         eval {
3254             my $conf = $vmdata->{qemu}->{$vmid};
3255             my $vmfw_conf = $vmfw_configs->{$vmid};
3256             return if !$vmfw_conf;
3257
3258             foreach my $netid (keys %$conf) {
3259                 next if $netid !~ m/^net(\d+)$/;
3260                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3261                 next if !$net->{firewall};
3262                 my $iface = "tap${vmid}i$1";
3263
3264                 my $macaddr = $net->{macaddr};
3265                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3266                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3267                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3268                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3269             }
3270         };
3271         warn $@ if $@; # just to be sure - should not happen
3272     }
3273
3274     # generate firewall rules for LXC containers
3275     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3276         eval {
3277             my $conf = $vmdata->{lxc}->{$vmid};
3278             my $vmfw_conf = $vmfw_configs->{$vmid};
3279             return if !$vmfw_conf;
3280
3281             if ($vmfw_conf->{options}->{enable}) {
3282                 foreach my $netid (keys %$conf) {
3283                     next if $netid !~ m/^net(\d+)$/;
3284                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3285                     next if !$net->{firewall};
3286                     my $iface = "veth${vmid}i$1";
3287                     my $macaddr = $net->{hwaddr};
3288                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3289                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3290                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3291                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3292                 }
3293             }
3294         };
3295         warn $@ if $@; # just to be sure - should not happen
3296     }
3297
3298     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3299         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3300     }
3301
3302     return $ruleset;
3303 }
3304
3305 sub mac_to_linklocal {
3306     my ($macaddr) = @_;
3307     my @parts = split(/:/, $macaddr);
3308     # The standard link local address uses the fe80::/64 prefix with the
3309     # modified EUI-64 identifier derived from the MAC address by flipping the
3310     # universal/local bit and inserting FF:FE in the middle.
3311     # See RFC 4291.
3312     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3313     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3314     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3315 }
3316
3317 sub compile_ipsets {
3318     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3319
3320     my $localnet;
3321     if ($cluster_conf->{aliases}->{local_network}) {
3322         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3323     } else {
3324         my $localnet_ver;
3325         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3326
3327         $cluster_conf->{aliases}->{local_network} = {
3328             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3329     }
3330
3331     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3332
3333
3334     my $ipset_ruleset = {};
3335
3336     # generate ipsets for QEMU VMs
3337     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3338         eval {
3339             my $conf = $vmdata->{qemu}->{$vmid};
3340             my $vmfw_conf = $vmfw_configs->{$vmid};
3341             return if !$vmfw_conf;
3342
3343             # When the 'ipfilter' option is enabled every device for which there
3344             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3345             # ipset.
3346             # The reason is that ipfilter ipsets are always filled with standard
3347             # IPv6 link-local filters.
3348             my $ipsets = $vmfw_conf->{ipset};
3349             my $implicit_sets = {};
3350
3351             my $device_ips = {};
3352             foreach my $netid (keys %$conf) {
3353                 next if $netid !~ m/^net(\d+)$/;
3354                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3355                 next if !$net->{firewall};
3356
3357                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3358                     $implicit_sets->{"ipfilter-$netid"} = [];
3359                 }
3360
3361                 my $macaddr = $net->{macaddr};
3362                 my $linklocal = mac_to_linklocal($macaddr);
3363                 $device_ips->{$netid} = [
3364                     { cidr => $linklocal },
3365                     { cidr => 'fe80::/10', nomatch => 1 }
3366                 ];
3367             }
3368
3369             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3370             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3371         };
3372         warn $@ if $@; # just to be sure - should not happen
3373     }
3374
3375     # generate firewall rules for LXC containers
3376     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3377         eval {
3378             my $conf = $vmdata->{lxc}->{$vmid};
3379             my $vmfw_conf = $vmfw_configs->{$vmid};
3380             return if !$vmfw_conf;
3381
3382             # When the 'ipfilter' option is enabled every device for which there
3383             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3384             # ipset.
3385             # The reason is that ipfilter ipsets are always filled with standard
3386             # IPv6 link-local filters, as well as the IP addresses configured
3387             # for the container.
3388             my $ipsets = $vmfw_conf->{ipset};
3389             my $implicit_sets = {};
3390
3391             my $device_ips = {};
3392             foreach my $netid (keys %$conf) {
3393                 next if $netid !~ m/^net(\d+)$/;
3394                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3395                 next if !$net->{firewall};
3396
3397                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3398                     $implicit_sets->{"ipfilter-$netid"} = [];
3399                 }
3400
3401                 my $macaddr = $net->{hwaddr};
3402                 my $linklocal = mac_to_linklocal($macaddr);
3403                 my $set = $device_ips->{$netid} = [
3404                     { cidr => $linklocal },
3405                     { cidr => 'fe80::/10', nomatch => 1 }
3406                 ];
3407                 if ($net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3408                     push @$set, { cidr => $1 };
3409                 }
3410                 if ($net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3411                     push @$set, { cidr => $1 };
3412                 }
3413             }
3414
3415             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3416             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3417         };
3418         warn $@ if $@; # just to be sure - should not happen
3419     }
3420
3421     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3422
3423     return $ipset_ruleset;
3424 }
3425
3426 sub get_ruleset_status {
3427     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3428
3429     my $statushash = {};
3430
3431     foreach my $chain (sort keys %$ruleset) {
3432         my $sig = &$digest_fn($ruleset->{$chain});
3433
3434         $statushash->{$chain}->{sig} = $sig;
3435
3436         my $oldsig = $active_chains->{$chain};
3437         if (!defined($oldsig)) {
3438             $statushash->{$chain}->{action} = 'create';
3439         } else {
3440             if ($oldsig eq $sig) {
3441                 $statushash->{$chain}->{action} = 'exists';
3442             } else {
3443                 $statushash->{$chain}->{action} = 'update';
3444             }
3445         }
3446         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3447         foreach my $cmd (@{$ruleset->{$chain}}) {
3448             print "\t$cmd\n" if $verbose;
3449         }
3450     }
3451
3452     foreach my $chain (sort keys %$active_chains) {
3453         if (!defined($ruleset->{$chain})) {
3454             my $sig = $active_chains->{$chain};
3455             $statushash->{$chain}->{action} = 'delete';
3456             $statushash->{$chain}->{sig} = $sig;
3457             print "delete $chain ($sig)\n" if $verbose;
3458         }
3459     }
3460
3461     return $statushash;
3462 }
3463
3464 sub print_sig_rule {
3465     my ($chain, $sig) = @_;
3466
3467     # We just use this to store a SHA1 checksum used to detect changes
3468     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3469 }
3470
3471 sub get_ruleset_cmdlist {
3472     my ($ruleset, $verbose, $iptablescmd) = @_;
3473
3474     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3475
3476     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3477     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3478
3479     # create missing chains first
3480     foreach my $chain (sort keys %$ruleset) {
3481         my $stat = $statushash->{$chain};
3482         die "internal error" if !$stat;
3483         next if $stat->{action} ne 'create';
3484
3485         $cmdlist .= ":$chain - [0:0]\n";
3486     }
3487
3488     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3489         my $chain = "PVEFW-$h";
3490         if ($ruleset->{$chain} && !$hooks->{$h}) {
3491             $cmdlist .= "-A $h -j $chain\n";
3492         }
3493     }
3494
3495     foreach my $chain (sort keys %$ruleset) {
3496         my $stat = $statushash->{$chain};
3497         die "internal error" if !$stat;
3498
3499         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3500             $cmdlist .= "-F $chain\n";
3501             foreach my $cmd (@{$ruleset->{$chain}}) {
3502                 $cmdlist .= "$cmd\n";
3503             }
3504             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3505         } elsif ($stat->{action} eq 'delete') {
3506             die "internal error"; # this should not happen
3507         } elsif ($stat->{action} eq 'exists') {
3508             # do nothing
3509         } else {
3510             die "internal error - unknown status '$stat->{action}'";
3511         }
3512     }
3513
3514     foreach my $chain (keys %$statushash) {
3515         next if $statushash->{$chain}->{action} ne 'delete';
3516         $cmdlist .= "-F $chain\n";
3517     }
3518     foreach my $chain (keys %$statushash) {
3519         next if $statushash->{$chain}->{action} ne 'delete';
3520         next if $chain eq 'PVEFW-INPUT';
3521         next if $chain eq 'PVEFW-OUTPUT';
3522         next if $chain eq 'PVEFW-FORWARD';
3523         $cmdlist .= "-X $chain\n";
3524     }
3525
3526     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3527
3528     $cmdlist .= "COMMIT\n";
3529
3530     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3531 }
3532
3533 sub get_ipset_cmdlist {
3534     my ($ruleset, $verbose) = @_;
3535
3536     my $cmdlist = "";
3537
3538     my $delete_cmdlist = "";
3539
3540     my $active_chains = ipset_get_chains();
3541     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3542
3543     # remove stale _swap chains
3544     foreach my $chain (keys %$active_chains) {
3545         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3546             $cmdlist .= "destroy $chain\n";
3547         }
3548     }
3549
3550     foreach my $chain (keys %$ruleset) {
3551         my $stat = $statushash->{$chain};
3552         die "internal error" if !$stat;
3553
3554         if ($stat->{action} eq 'create') {
3555             foreach my $cmd (@{$ruleset->{$chain}}) {
3556                 $cmdlist .= "$cmd\n";
3557             }
3558         }
3559     }
3560
3561     foreach my $chain (keys %$ruleset) {
3562         my $stat = $statushash->{$chain};
3563         die "internal error" if !$stat;
3564
3565         if ($stat->{action} eq 'update') {
3566             my $chain_swap = $chain."_swap";
3567
3568             foreach my $cmd (@{$ruleset->{$chain}}) {
3569                 $cmd =~ s/$chain/$chain_swap/;
3570                 $cmdlist .= "$cmd\n";
3571             }
3572             $cmdlist .= "swap $chain_swap $chain\n";
3573             $cmdlist .= "flush $chain_swap\n";
3574             $cmdlist .= "destroy $chain_swap\n";
3575         }
3576     }
3577
3578      # the remove unused chains
3579     foreach my $chain (keys %$statushash) {
3580         next if $statushash->{$chain}->{action} ne 'delete';
3581
3582         $delete_cmdlist .= "flush $chain\n";
3583         $delete_cmdlist .= "destroy $chain\n";
3584     }
3585
3586     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3587
3588     return ($cmdlist, $delete_cmdlist, $changes);
3589 }
3590
3591 sub apply_ruleset {
3592     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3593
3594     enable_bridge_firewall();
3595
3596     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3597         get_ipset_cmdlist($ipset_ruleset, $verbose);
3598
3599     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3600     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3601
3602     if ($verbose) {
3603         if ($ipset_changes) {
3604             print "ipset changes:\n";
3605             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3606             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3607         }
3608
3609         if ($changes) {
3610             print "iptables changes:\n";
3611             print $cmdlist;
3612         }
3613
3614         if ($changesv6) {
3615             print "ip6tables changes:\n";
3616             print $cmdlistv6;
3617         }
3618     }
3619
3620     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3621     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3622
3623     ipset_restore_cmdlist($ipset_create_cmdlist);
3624
3625     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3626     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3627
3628     iptables_restore_cmdlist($cmdlist);
3629
3630     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3631     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3632
3633     ip6tables_restore_cmdlist($cmdlistv6);
3634
3635     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3636     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3637
3638     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3639
3640     # test: re-read status and check if everything is up to date
3641     my $active_chains = iptables_get_chains();
3642     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3643
3644     my $errors;
3645     foreach my $chain (sort keys %$ruleset) {
3646         my $stat = $statushash->{$chain};
3647         if ($stat->{action} ne 'exists') {
3648             warn "unable to update chain '$chain'\n";
3649             $errors = 1;
3650         }
3651     }
3652
3653     my $active_chainsv6 = iptables_get_chains("ip6tables");
3654     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3655
3656     foreach my $chain (sort keys %$rulesetv6) {
3657         my $stat = $statushashv6->{$chain};
3658         if ($stat->{action} ne 'exists') {
3659             warn "unable to update chain '$chain'\n";
3660             $errors = 1;
3661         }
3662     }
3663
3664     die "unable to apply firewall changes\n" if $errors;
3665
3666     update_nf_conntrack_max($hostfw_conf);
3667
3668     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3669
3670 }
3671
3672 sub update_nf_conntrack_max {
3673     my ($hostfw_conf) = @_;
3674
3675     my $max = 65536; # reasonable default
3676
3677     my $options = $hostfw_conf->{options} || {};
3678
3679     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3680         $max = $options->{nf_conntrack_max};
3681         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3682     }
3683
3684     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3685     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3686
3687     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3688
3689     if ($current != $max) {
3690         my $hashsize = int($max/4);
3691         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3692         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3693     }
3694 }
3695
3696 sub update_nf_conntrack_tcp_timeout_established {
3697     my ($hostfw_conf) = @_;
3698
3699     my $options = $hostfw_conf->{options} || {};
3700
3701     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3702
3703     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3704 }
3705
3706 sub remove_pvefw_chains {
3707
3708     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3709     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3710     PVE::Firewall::remove_pvefw_chains_ipset();
3711
3712 }
3713
3714 sub remove_pvefw_chains_iptables {
3715     my ($iptablescmd) = @_;
3716
3717     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3718     my $cmdlist = "*filter\n";
3719
3720     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3721         if ($hooks->{$h}) {
3722             $cmdlist .= "-D $h -j PVEFW-$h\n";
3723         }
3724     }
3725
3726     foreach my $chain (keys %$chash) {
3727         $cmdlist .= "-F $chain\n";
3728     }
3729
3730     foreach my $chain (keys %$chash) {
3731         $cmdlist .= "-X $chain\n";
3732     }
3733     $cmdlist .= "COMMIT\n";
3734
3735     if($iptablescmd eq "ip6tables") {
3736         ip6tables_restore_cmdlist($cmdlist);
3737     } else {
3738         iptables_restore_cmdlist($cmdlist);
3739     }
3740 }
3741
3742 sub remove_pvefw_chains_ipset {
3743
3744     my $ipset_chains = ipset_get_chains();
3745
3746     my $cmdlist = "";
3747
3748     foreach my $chain (keys %$ipset_chains) {
3749         $cmdlist .= "flush $chain\n";
3750         $cmdlist .= "destroy $chain\n";
3751     }
3752
3753     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3754 }
3755
3756 sub init {
3757     my $cluster_conf = load_clusterfw_conf();
3758     my $cluster_options = $cluster_conf->{options};
3759     my $enable = $cluster_options->{enable};
3760
3761     return if !$enable;
3762
3763     # load required modules here
3764 }
3765
3766 sub update {
3767     my $code = sub {
3768
3769         my $cluster_conf = load_clusterfw_conf();
3770         my $cluster_options = $cluster_conf->{options};
3771
3772         if (!$cluster_options->{enable}) {
3773             PVE::Firewall::remove_pvefw_chains();
3774             return;
3775         }
3776
3777         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3778
3779         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3780
3781         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3782     };
3783
3784     run_locked($code);
3785 }
3786
3787 1;