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 PVE::Network;
  16 use File::Basename;
  17 use File::Path;
  18 use IO::File;
  19 use Net::IP;
  20 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  21 use Encode;
  22
  23 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  24 my $pvefw_conf_dir = "/etc/pve/firewall";
  25 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  26
  27 # dynamically include PVE::QemuServer and PVE::LXC
  28 # to avoid dependency problems
  29 my $have_qemu_server;
  30 eval {
  31     require PVE::QemuServer;
  32     require PVE::QemuConfig;
  33     $have_qemu_server = 1;
  34 };
  35
  36 my $have_lxc;
  37 eval {
  38     require PVE::LXC;
  39     $have_lxc = 1;
  40 };
  41
  42
  43 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  44
  45 mkdir $pve_fw_status_dir; # make sure this exists
  46
  47 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50
  51 my $max_alias_name_length = 64;
  52 my $max_ipset_name_length = 64;
  53 my $max_group_name_length = 18;
  54
  55 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  56 sub pve_verify_ip_or_cidr {
  57     my ($cidr, $noerr) = @_;
  58
  59     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  60         return $cidr if Net::IP->new($cidr);
  61         return undef if $noerr;
  62         die Net::IP::Error() . "\n";
  63     }
  64     return undef if $noerr;
  65     die "value does not look like a valid IP address or CIDR network\n";
  66 }
  67
  68 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  69 sub pve_verify_ip_or_cidr_or_alias {
  70     my ($cidr, $noerr) = @_;
  71
  72     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  73
  74     return pve_verify_ip_or_cidr($cidr, $noerr);
  75 }
  76
  77 PVE::JSONSchema::register_standard_option('ipset-name', {
  78     description => "IP set name.",
  79     type => 'string',
  80     pattern => $ipset_name_pattern,
  81     minLength => 2,
  82     maxLength => $max_ipset_name_length,
  83 });
  84
  85 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  86     description => "Alias name.",
  87     type => 'string',
  88     pattern => $ip_alias_pattern,
  89     minLength => 2,
  90     maxLength => $max_alias_name_length,
  91 });
  92
  93 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  94     description => "Log level.",
  95     type => 'string',
  96     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  97     optional => 1,
  98 });
  99
 100 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 101     description => "Security Group name.",
 102     type => 'string',
 103     pattern => $security_group_name_pattern,
 104     minLength => 2,
 105     maxLength => $max_group_name_length,
 106 });
 107
 108 my $feature_ipset_nomatch = 0;
 109 eval  {
 110     my (undef, undef, $release) = POSIX::uname();
 111     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 112         my ($major, $minor) = ($1, $2);
 113         $feature_ipset_nomatch = 1 if ($major > 3) ||
 114             ($major == 3 && $minor >= 7);
 115     }
 116
 117 };
 118
 119 my $nodename = PVE::INotify::nodename();
 120
 121 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 122
 123 my $default_log_level = 'nolog'; # avoid logs by default
 124
 125 my $log_level_hash = {
 126     debug => 7,
 127     info => 6,
 128     notice => 5,
 129     warning => 4,
 130     err => 3,
 131     crit => 2,
 132     alert => 1,
 133     emerg => 0,
 134 };
 135
 136 # we need to overwrite some macros for ipv6
 137 my $pve_ipv6fw_macros = {
 138     'Ping' => [
 139         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 140     ],
 141     'NeighborDiscovery' => [
 142         "IPv6 neighbor solicitation, neighbor and router advertisement",
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 146         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 147     ],
 148     'DHCPv6' => [
 149         "DHCPv6 traffic",
 150         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 151     ],
 152     'Trcrt' => [
 153         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 154         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 155     ],
 156  };
 157
 158 # imported/converted from: /usr/share/shorewall/macro.*
 159 my $pve_fw_macros = {
 160     'Amanda' => [
 161         "Amanda Backup",
 162         { action => 'PARAM', proto => 'udp', dport => '10080' },
 163         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 164     ],
 165     'Auth' => [
 166         "Auth (identd) traffic",
 167         { action => 'PARAM', proto => 'tcp', dport => '113' },
 168     ],
 169     'BGP' => [
 170         "Border Gateway Protocol traffic",
 171         { action => 'PARAM', proto => 'tcp', dport => '179' },
 172     ],
 173     'BitTorrent' => [
 174         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 175         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 176         { action => 'PARAM', proto => 'udp', dport => '6881' },
 177     ],
 178     'BitTorrent32' => [
 179         "BitTorrent traffic for BitTorrent 3.2 and later",
 180         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 181         { action => 'PARAM', proto => 'udp', dport => '6881' },
 182     ],
 183     'Ceph' => [
 184         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 185         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 186         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 187     ],
 188     'CVS' => [
 189         "Concurrent Versions System pserver traffic",
 190         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 191     ],
 192     'Citrix' => [
 193         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 194         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 195         { action => 'PARAM', proto => 'udp', dport => '1604' },
 196         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 197     ],
 198     'DAAP' => [
 199         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 200         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 201         { action => 'PARAM', proto => 'udp', dport => '3689' },
 202     ],
 203     'DCC' => [
 204         "Distributed Checksum Clearinghouse spam filtering mechanism",
 205         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 206     ],
 207     'DHCPfwd' => [
 208         "Forwarded DHCP traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 210     ],
 211     'DNS' => [
 212         "Domain Name System traffic (upd and tcp)",
 213         { action => 'PARAM', proto => 'udp', dport => '53' },
 214         { action => 'PARAM', proto => 'tcp', dport => '53' },
 215     ],
 216     'Distcc' => [
 217         "Distributed Compiler service",
 218         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 219     ],
 220     'FTP' => [
 221         "File Transfer Protocol",
 222         { action => 'PARAM', proto => 'tcp', dport => '21' },
 223     ],
 224     'Finger' => [
 225         "Finger protocol (RFC 742)",
 226         { action => 'PARAM', proto => 'tcp', dport => '79' },
 227     ],
 228     'GNUnet' => [
 229         "GNUnet secure peer-to-peer networking traffic",
 230         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 231         { action => 'PARAM', proto => 'udp', dport => '2086' },
 232         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 233         { action => 'PARAM', proto => 'udp', dport => '1080' },
 234     ],
 235     'GRE' => [
 236         "Generic Routing Encapsulation tunneling protocol",
 237         { action => 'PARAM', proto => '47' },
 238     ],
 239     'Git' => [
 240         "Git distributed revision control traffic",
 241         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 242     ],
 243     'HKP' => [
 244         "OpenPGP HTTP keyserver protocol traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 246     ],
 247     'HTTP' => [
 248         "Hypertext Transfer Protocol (WWW)",
 249         { action => 'PARAM', proto => 'tcp', dport => '80' },
 250     ],
 251     'HTTPS' => [
 252         "Hypertext Transfer Protocol (WWW) over SSL",
 253         { action => 'PARAM', proto => 'tcp', dport => '443' },
 254     ],
 255     'ICPV2' => [
 256         "Internet Cache Protocol V2 (Squid) traffic",
 257         { action => 'PARAM', proto => 'udp', dport => '3130' },
 258     ],
 259     'ICQ' => [
 260         "AOL Instant Messenger traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 262     ],
 263     'IMAP' => [
 264         "Internet Message Access Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '143' },
 266     ],
 267     'IMAPS' => [
 268         "Internet Message Access Protocol over SSL",
 269         { action => 'PARAM', proto => 'tcp', dport => '993' },
 270     ],
 271     'IPIP' => [
 272         "IPIP capsulation traffic",
 273         { action => 'PARAM', proto => '94' },
 274     ],
 275     'IPsec' => [
 276         "IPsec traffic",
 277         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 278         { action => 'PARAM', proto => '50' },
 279     ],
 280     'IPsecah' => [
 281         "IPsec authentication (AH) traffic",
 282         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 283         { action => 'PARAM', proto => '51' },
 284     ],
 285     'IPsecnat' => [
 286         "IPsec traffic and Nat-Traversal",
 287         { action => 'PARAM', proto => 'udp', dport => '500' },
 288         { action => 'PARAM', proto => 'udp', dport => '4500' },
 289         { action => 'PARAM', proto => '50' },
 290     ],
 291     'IRC' => [
 292         "Internet Relay Chat traffic",
 293         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 294     ],
 295     'Jetdirect' => [
 296         "HP Jetdirect printing",
 297         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 298     ],
 299     'L2TP' => [
 300         "Layer 2 Tunneling Protocol traffic",
 301         { action => 'PARAM', proto => 'udp', dport => '1701' },
 302     ],
 303     'LDAP' => [
 304         "Lightweight Directory Access Protocol traffic",
 305         { action => 'PARAM', proto => 'tcp', dport => '389' },
 306     ],
 307     'LDAPS' => [
 308         "Secure Lightweight Directory Access Protocol traffic",
 309         { action => 'PARAM', proto => 'tcp', dport => '636' },
 310     ],
 311     'MSNP' => [
 312         "Microsoft Notification Protocol",
 313         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 314     ],
 315     'MSSQL' => [
 316         "Microsoft SQL Server",
 317         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 318     ],
 319     'Mail' => [
 320         "Mail traffic (SMTP, SMTPS, Submission)",
 321         { action => 'PARAM', proto => 'tcp', dport => '25' },
 322         { action => 'PARAM', proto => 'tcp', dport => '465' },
 323         { action => 'PARAM', proto => 'tcp', dport => '587' },
 324     ],
 325     'Munin' => [
 326         "Munin networked resource monitoring traffic",
 327         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 328     ],
 329     'MySQL' => [
 330         "MySQL server",
 331         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 332     ],
 333     'NNTP' => [
 334         "NNTP traffic (Usenet).",
 335         { action => 'PARAM', proto => 'tcp', dport => '119' },
 336     ],
 337     'NNTPS' => [
 338         "Encrypted NNTP traffic (Usenet)",
 339         { action => 'PARAM', proto => 'tcp', dport => '563' },
 340     ],
 341     'NTP' => [
 342         "Network Time Protocol (ntpd)",
 343         { action => 'PARAM', proto => 'udp', dport => '123' },
 344     ],
 345     'OSPF' => [
 346         "OSPF multicast traffic",
 347         { action => 'PARAM', proto => '89' },
 348     ],
 349     'OpenVPN' => [
 350         "OpenVPN traffic",
 351         { action => 'PARAM', proto => 'udp', dport => '1194' },
 352     ],
 353     'PCA' => [
 354         "Symantec PCAnywere (tm)",
 355         { action => 'PARAM', proto => 'udp', dport => '5632' },
 356         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 357     ],
 358     'POP3' => [
 359         "POP3 traffic",
 360         { action => 'PARAM', proto => 'tcp', dport => '110' },
 361     ],
 362     'POP3S' => [
 363         "Encrypted POP3 traffic",
 364         { action => 'PARAM', proto => 'tcp', dport => '995' },
 365     ],
 366     'PPtP' => [
 367         "Point-to-Point Tunneling Protocol",
 368         { action => 'PARAM', proto => '47' },
 369         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 370     ],
 371     'Ping' => [
 372         "ICMP echo request",
 373         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 374     ],
 375     'PostgreSQL' => [
 376         "PostgreSQL server",
 377         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 378     ],
 379     'Printer' => [
 380         "Line Printer protocol printing",
 381         { action => 'PARAM', proto => 'tcp', dport => '515' },
 382     ],
 383     'RDP' => [
 384         "Microsoft Remote Desktop Protocol traffic",
 385         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 386     ],
 387     'RIP' => [
 388         "Routing Information Protocol (bidirectional)",
 389         { action => 'PARAM', proto => 'udp', dport => '520' },
 390     ],
 391     'RNDC' => [
 392         "BIND remote management protocol",
 393         { action => 'PARAM', proto => 'tcp', dport => '953' },
 394     ],
 395     'Razor' => [
 396         "Razor Antispam System",
 397         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 398     ],
 399     'Rdate' => [
 400         "Remote time retrieval (rdate)",
 401         { action => 'PARAM', proto => 'tcp', dport => '37' },
 402     ],
 403     'Rsync' => [
 404         "Rsync server",
 405         { action => 'PARAM', proto => 'tcp', dport => '873' },
 406     ],
 407     'SANE' => [
 408         "SANE network scanning",
 409         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 410     ],
 411     'SMB' => [
 412         "Microsoft SMB traffic",
 413         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 414         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 415         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 416         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 417     ],
 418     'SMBswat' => [
 419         "Samba Web Administration Tool",
 420         { action => 'PARAM', proto => 'tcp', dport => '901' },
 421     ],
 422     'SMTP' => [
 423         "Simple Mail Transfer Protocol",
 424         { action => 'PARAM', proto => 'tcp', dport => '25' },
 425     ],
 426     'SMTPS' => [
 427         "Encrypted Simple Mail Transfer Protocol",
 428         { action => 'PARAM', proto => 'tcp', dport => '465' },
 429     ],
 430     'SNMP' => [
 431         "Simple Network Management Protocol",
 432         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 433         { action => 'PARAM', proto => 'tcp', dport => '161' },
 434     ],
 435     'SPAMD' => [
 436         "Spam Assassin SPAMD traffic",
 437         { action => 'PARAM', proto => 'tcp', dport => '783' },
 438     ],
 439     'SSH' => [
 440         "Secure shell traffic",
 441         { action => 'PARAM', proto => 'tcp', dport => '22' },
 442     ],
 443     'SVN' => [
 444         "Subversion server (svnserve)",
 445         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 446     ],
 447     'SixXS' => [
 448         "SixXS IPv6 Deployment and Tunnel Broker",
 449         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 450         { action => 'PARAM', proto => 'udp', dport => '3740' },
 451         { action => 'PARAM', proto => '41' },
 452         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 453     ],
 454     'Squid' => [
 455         "Squid web proxy traffic",
 456         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 457     ],
 458     'Submission' => [
 459         "Mail message submission traffic",
 460         { action => 'PARAM', proto => 'tcp', dport => '587' },
 461     ],
 462     'Syslog' => [
 463         "Syslog protocol (RFC 5424) traffic",
 464         { action => 'PARAM', proto => 'udp', dport => '514' },
 465         { action => 'PARAM', proto => 'tcp', dport => '514' },
 466     ],
 467     'TFTP' => [
 468         "Trivial File Transfer Protocol traffic",
 469         { action => 'PARAM', proto => 'udp', dport => '69' },
 470     ],
 471     'Telnet' => [
 472         "Telnet traffic",
 473         { action => 'PARAM', proto => 'tcp', dport => '23' },
 474     ],
 475     'Telnets' => [
 476         "Telnet over SSL",
 477         { action => 'PARAM', proto => 'tcp', dport => '992' },
 478     ],
 479     'Time' => [
 480         "RFC 868 Time protocol",
 481         { action => 'PARAM', proto => 'tcp', dport => '37' },
 482     ],
 483     'Trcrt' => [
 484         "Traceroute (for up to 30 hops) traffic",
 485         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 486         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 487     ],
 488     'VNC' => [
 489         "VNC traffic for VNC display's 0 - 99",
 490         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 491     ],
 492     'VNCL' => [
 493         "VNC traffic from Vncservers to Vncviewers in listen mode",
 494         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 495     ],
 496     'Web' => [
 497         "WWW traffic (HTTP and HTTPS)",
 498         { action => 'PARAM', proto => 'tcp', dport => '80' },
 499         { action => 'PARAM', proto => 'tcp', dport => '443' },
 500     ],
 501     'Webcache' => [
 502         "Web Cache/Proxy traffic (port 8080)",
 503         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 504     ],
 505     'Webmin' => [
 506         "Webmin traffic",
 507         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 508     ],
 509     'Whois' => [
 510         "Whois (nicname, RFC 3912) traffic",
 511         { action => 'PARAM', proto => 'tcp', dport => '43' },
 512     ],
 513 };
 514
 515 my $pve_fw_parsed_macros;
 516 my $pve_fw_macro_descr;
 517 my $pve_fw_macro_ipversion = {};
 518 my $pve_fw_preferred_macro_names = {};
 519
 520 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 521 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 522
 523 my $pve_std_chains = {};
 524 $pve_std_chains->{4} = {
 525     'PVEFW-SET-ACCEPT-MARK' => [
 526         "-j MARK --set-mark $FWACCEPTMARK_ON",
 527     ],
 528     'PVEFW-DropBroadcast' => [
 529         # same as shorewall 'Broadcast'
 530         # simply DROP BROADCAST/MULTICAST/ANYCAST
 531         # we can use this to reduce logging
 532         { action => 'DROP', dsttype => 'BROADCAST' },
 533         { action => 'DROP', dsttype => 'MULTICAST' },
 534         { action => 'DROP', dsttype => 'ANYCAST' },
 535         { action => 'DROP', dest => '224.0.0.0/4' },
 536     ],
 537     'PVEFW-reject' => [
 538         # same as shorewall 'reject'
 539         { action => 'DROP', dsttype => 'BROADCAST' },
 540         { action => 'DROP', source => '224.0.0.0/4' },
 541         { action => 'DROP', proto => 'icmp' },
 542         "-p tcp -j REJECT --reject-with tcp-reset",
 543         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 544         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 545         "-j REJECT --reject-with icmp-host-prohibited",
 546     ],
 547     'PVEFW-Drop' => [
 548         # same as shorewall 'Drop', which is equal to DROP,
 549         # but REJECT/DROP some packages to reduce logging,
 550         # and ACCEPT critical ICMP types
 551         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 552         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 553         { action => 'PVEFW-DropBroadcast' },
 554         # ACCEPT critical ICMP types
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 556         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 557         # Drop packets with INVALID state
 558         "-m conntrack --ctstate INVALID -j DROP",
 559         # Drop Microsoft SMB noise
 560         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 561         { action => 'DROP', proto => 'udp', dport => '137:139'},
 562         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 563         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 564         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 565         # Drop new/NotSyn traffic so that it doesn't get logged
 566         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 567         # Drop DNS replies
 568         { action => 'DROP', proto => 'udp', sport => 53 },
 569     ],
 570     'PVEFW-Reject' => [
 571         # same as shorewall 'Reject', which is equal to Reject,
 572         # but REJECT/DROP some packages to reduce logging,
 573         # and ACCEPT critical ICMP types
 574         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 575         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 576         { action => 'PVEFW-DropBroadcast' },
 577         # ACCEPT critical ICMP types
 578         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 579         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 580         # Drop packets with INVALID state
 581         "-m conntrack --ctstate INVALID -j DROP",
 582         # Drop Microsoft SMB noise
 583         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 584         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 585         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 586         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 587         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 588         # Drop new/NotSyn traffic so that it doesn't get logged
 589         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 590         # Drop DNS replies
 591         { action => 'DROP', proto => 'udp', sport => 53 },
 592     ],
 593     'PVEFW-tcpflags' => [
 594         # same as shorewall tcpflags action.
 595         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 596         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 597         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 598         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 599         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 600         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 601     ],
 602     'PVEFW-smurfs' => [
 603         # same as shorewall smurfs action
 604         # Filter packets for smurfs (packets with a broadcast address as the source).
 605         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 606         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 607         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 608     ],
 609 };
 610
 611 $pve_std_chains->{6} = {
 612     'PVEFW-SET-ACCEPT-MARK' => [
 613         "-j MARK --set-mark $FWACCEPTMARK_ON",
 614     ],
 615     'PVEFW-DropBroadcast' => [
 616         # same as shorewall 'Broadcast'
 617         # simply DROP BROADCAST/MULTICAST/ANYCAST
 618         # we can use this to reduce logging
 619         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 620         # ipv6 addrtype does not work with kernel 2.6.32
 621         #{ action => 'DROP', dsttype => 'MULTICAST' },
 622         #{ action => 'DROP', dsttype => 'ANYCAST' },
 623         { action => 'DROP', dest => 'ff00::/8' },
 624         #{ action => 'DROP', dest => '224.0.0.0/4' },
 625     ],
 626     'PVEFW-reject' => [
 627         # same as shorewall 'reject'
 628         #{ action => 'DROP', dsttype => 'BROADCAST' },
 629         #{ action => 'DROP', source => '224.0.0.0/4' },
 630         { action => 'DROP', proto => 'icmpv6' },
 631         "-p tcp -j REJECT --reject-with tcp-reset",
 632         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 633         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 634         #"-j REJECT --reject-with icmp-host-prohibited",
 635     ],
 636     'PVEFW-Drop' => [
 637         # same as shorewall 'Drop', which is equal to DROP,
 638         # but REJECT/DROP some packages to reduce logging,
 639         # and ACCEPT critical ICMP types
 640         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 641         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 642         { action => 'PVEFW-DropBroadcast' },
 643         # ACCEPT critical ICMP types
 644         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 645         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 646         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 647
 648         # Drop packets with INVALID state
 649         "-m conntrack --ctstate INVALID -j DROP",
 650         # Drop Microsoft SMB noise
 651         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 652         { action => 'DROP', proto => 'udp', dport => '137:139'},
 653         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 654         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 655         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 656         # Drop new/NotSyn traffic so that it doesn't get logged
 657         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 658         # Drop DNS replies
 659         { action => 'DROP', proto => 'udp', sport => 53 },
 660     ],
 661     'PVEFW-Reject' => [
 662         # same as shorewall 'Reject', which is equal to Reject,
 663         # but REJECT/DROP some packages to reduce logging,
 664         # and ACCEPT critical ICMP types
 665         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 666         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 667         { action => 'PVEFW-DropBroadcast' },
 668         # ACCEPT critical ICMP types
 669         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 670         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 671         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 672
 673         # Drop packets with INVALID state
 674         "-m conntrack --ctstate INVALID -j DROP",
 675         # Drop Microsoft SMB noise
 676         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 677         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 678         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 679         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 680         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 681         # Drop new/NotSyn traffic so that it doesn't get logged
 682         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 683         # Drop DNS replies
 684         { action => 'DROP', proto => 'udp', sport => 53 },
 685     ],
 686     'PVEFW-tcpflags' => [
 687         # same as shorewall tcpflags action.
 688         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 689         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 690         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 691         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 692         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 693         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 694     ],
 695 };
 696
 697 # iptables -p icmp -h
 698 my $icmp_type_names = {
 699     any => 1,
 700     'echo-reply' => 1,
 701     'destination-unreachable' => 1,
 702     'network-unreachable' => 1,
 703     'host-unreachable' => 1,
 704     'protocol-unreachable' => 1,
 705     'port-unreachable' => 1,
 706     'fragmentation-needed' => 1,
 707     'source-route-failed' => 1,
 708     'network-unknown' => 1,
 709     'host-unknown' => 1,
 710     'network-prohibited' => 1,
 711     'host-prohibited' => 1,
 712     'TOS-network-unreachable' => 1,
 713     'TOS-host-unreachable' => 1,
 714     'communication-prohibited' => 1,
 715     'host-precedence-violation' => 1,
 716     'precedence-cutoff' => 1,
 717     'source-quench' => 1,
 718     'redirect' => 1,
 719     'network-redirect' => 1,
 720     'host-redirect' => 1,
 721     'TOS-network-redirect' => 1,
 722     'TOS-host-redirect' => 1,
 723     'echo-request' => 1,
 724     'router-advertisement' => 1,
 725     'router-solicitation' => 1,
 726     'time-exceeded' => 1,
 727     'ttl-zero-during-transit' => 1,
 728     'ttl-zero-during-reassembly' => 1,
 729     'parameter-problem' => 1,
 730     'ip-header-bad' => 1,
 731     'required-option-missing' => 1,
 732     'timestamp-request' => 1,
 733     'timestamp-reply' => 1,
 734     'address-mask-request' => 1,
 735     'address-mask-reply' => 1,
 736 };
 737
 738 # ip6tables -p icmpv6 -h
 739
 740 my $icmpv6_type_names = {
 741     'any' => 1,
 742     'destination-unreachable' => 1,
 743     'no-route' => 1,
 744     'communication-prohibited' => 1,
 745     'address-unreachable' => 1,
 746     'port-unreachable' => 1,
 747     'packet-too-big' => 1,
 748     'time-exceeded' => 1,
 749     'ttl-zero-during-transit' => 1,
 750     'ttl-zero-during-reassembly' => 1,
 751     'parameter-problem' => 1,
 752     'bad-header' => 1,
 753     'unknown-header-type' => 1,
 754     'unknown-option' => 1,
 755     'echo-request' => 1,
 756     'echo-reply' => 1,
 757     'router-solicitation' => 1,
 758     'router-advertisement' => 1,
 759     'neighbor-solicitation' => 1,
 760     'neighbour-solicitation' => 1,
 761     'neighbor-advertisement' => 1,
 762     'neighbour-advertisement' => 1,
 763     'redirect' => 1,
 764 };
 765
 766 sub init_firewall_macros {
 767
 768     $pve_fw_parsed_macros = {};
 769
 770     my $parse = sub {
 771         my ($k, $macro) = @_;
 772         my $lc_name = lc($k);
 773         $pve_fw_macro_ipversion->{$k} = 0;
 774         while (!ref($macro->[0])) {
 775             my $desc = shift @$macro;
 776             if ($desc eq 'ipv4only') {
 777                 $pve_fw_macro_ipversion->{$k} = 4;
 778             } elsif ($desc eq 'ipv6only') {
 779                 $pve_fw_macro_ipversion->{$k} = 6;
 780             } else {
 781                 $pve_fw_macro_descr->{$k} = $desc;
 782             }
 783         }
 784         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 785         $pve_fw_parsed_macros->{$k} = $macro;
 786     };
 787
 788     foreach my $k (keys %$pve_fw_macros) {
 789         &$parse($k, $pve_fw_macros->{$k});
 790     }
 791
 792     foreach my $k (keys %$pve_ipv6fw_macros) {
 793         next if $pve_fw_parsed_macros->{$k};
 794         &$parse($k, $pve_ipv6fw_macros->{$k});
 795         $pve_fw_macro_ipversion->{$k} = 6;
 796     }
 797 }
 798
 799 init_firewall_macros();
 800
 801 sub get_macros {
 802     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 803 }
 804
 805 my $etc_services;
 806
 807 sub get_etc_services {
 808
 809     return $etc_services if $etc_services;
 810
 811     my $filename = "/etc/services";
 812
 813     my $fh = IO::File->new($filename, O_RDONLY);
 814     if (!$fh) {
 815         warn "unable to read '$filename' - $!\n";
 816         return {};
 817     }
 818
 819     my $services = {};
 820
 821     while (my $line = <$fh>) {
 822         chomp ($line);
 823         next if $line =~m/^#/;
 824         next if ($line =~m/^\s*$/);
 825
 826         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 827             $services->{byid}->{$2}->{name} = $1;
 828             $services->{byid}->{$2}->{port} = $2;
 829             $services->{byid}->{$2}->{$3} = 1;
 830             $services->{byname}->{$1} = $services->{byid}->{$2};
 831         }
 832     }
 833
 834     close($fh);
 835
 836     $etc_services = $services;
 837
 838
 839     return $etc_services;
 840 }
 841
 842 my $etc_protocols;
 843
 844 sub get_etc_protocols {
 845     return $etc_protocols if $etc_protocols;
 846
 847     my $filename = "/etc/protocols";
 848
 849     my $fh = IO::File->new($filename, O_RDONLY);
 850     if (!$fh) {
 851         warn "unable to read '$filename' - $!\n";
 852         return {};
 853     }
 854
 855     my $protocols = {};
 856
 857     while (my $line = <$fh>) {
 858         chomp ($line);
 859         next if $line =~m/^#/;
 860         next if ($line =~m/^\s*$/);
 861
 862         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 863             $protocols->{byid}->{$2}->{name} = $1;
 864             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 865         }
 866     }
 867
 868     close($fh);
 869
 870     # add special case for ICMP v6
 871     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 872     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 873
 874     $etc_protocols = $protocols;
 875
 876     return $etc_protocols;
 877 }
 878
 879 my $__local_network;
 880
 881 sub local_network {
 882     my ($new_value) = @_;
 883
 884     $__local_network = $new_value if defined($new_value);
 885
 886     return $__local_network if defined($__local_network);
 887
 888     eval {
 889         my $nodename = PVE::INotify::nodename();
 890
 891         my $ip = PVE::Cluster::remote_node_ip($nodename);
 892
 893         my $testip = Net::IP->new($ip);
 894
 895         my $isv6 = $testip->version == 6;
 896         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 897                            : PVE::ProcFSTools::read_proc_net_route();
 898         foreach my $entry (@$routes) {
 899             my $mask;
 900             if ($isv6) {
 901                 $mask = $entry->{prefix};
 902             } else {
 903                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 904                 next if !defined($mask);
 905             }
 906             my $cidr = "$entry->{dest}/$mask";
 907             my $testnet = Net::IP->new($cidr);
 908             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 909                 $__local_network = $cidr;
 910                 return;
 911             }
 912         }
 913     };
 914     warn $@ if $@;
 915
 916     return $__local_network;
 917 }
 918
 919 # ipset names are limited to 31 characters,
 920 # and we use '-v4' or '-v6' to indicate IP versions,
 921 # and we use '_swap' suffix for atomic update,
 922 # for example PVEFW-${VMID}-${ipset_name}_swap
 923
 924 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 925
 926 sub compute_ipset_chain_name {
 927     my ($vmid, $ipset_name, $ipversion) = @_;
 928
 929     $vmid = 0 if !defined($vmid);
 930
 931     my $id = "$vmid-${ipset_name}-v$ipversion";
 932
 933     if (length($id) > $max_iptables_ipset_name_length) {
 934         $id = PVE::Tools::fnv31a_hex($id);
 935     }
 936
 937     return "PVEFW-$id";
 938 }
 939
 940 sub compute_ipfilter_ipset_name {
 941     my ($iface) = @_;
 942
 943     return "ipfilter-$iface";
 944 }
 945
 946 sub parse_address_list {
 947     my ($str) = @_;
 948
 949     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 950         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 951         return;
 952     }
 953
 954     if ($str =~ m/^${ip_alias_pattern}$/) {
 955         die "alias name too long\n" if length($str) > $max_alias_name_length;
 956         return;
 957     }
 958
 959     my $count = 0;
 960     my $iprange = 0;
 961     my $ipversion;
 962
 963     foreach my $elem (split(/,/, $str)) {
 964         $count++;
 965         my $ip = Net::IP->new($elem);
 966         if (!$ip) {
 967             my $err = Net::IP::Error();
 968             die "invalid IP address: $err\n";
 969         }
 970         $iprange = 1 if $elem =~ m/-/;
 971
 972         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 973
 974         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 975             if $ipversion && ($new_ipversion != $ipversion);
 976
 977         $ipversion = $new_ipversion;
 978     }
 979
 980     die "you can't use a range in a list\n" if $iprange && $count > 1;
 981
 982     return $ipversion;
 983 }
 984
 985 sub parse_port_name_number_or_range {
 986     my ($str, $dport) = @_;
 987
 988     my $services = PVE::Firewall::get_etc_services();
 989     my $count = 0;
 990     my $icmp_port = 0;
 991
 992     foreach my $item (split(/,/, $str)) {
 993         $count++;
 994         if ($item =~ m/^(\d+):(\d+)$/) {
 995             my ($port1, $port2) = ($1, $2);
 996             die "invalid port '$port1'\n" if $port1 > 65535;
 997             die "invalid port '$port2'\n" if $port2 > 65535;
 998         } elsif ($item =~ m/^(\d+)$/) {
 999             my $port = $1;
1000             die "invalid port '$port'\n" if $port > 65535;
1001         } else {
1002             if ($dport && $icmp_type_names->{$item}) {
1003                 $icmp_port = 1;
1004             } elsif ($dport && $icmpv6_type_names->{$item}) {
1005                 $icmp_port = 1;
1006             } else {
1007                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1008             }
1009         }
1010     }
1011
1012     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1013
1014     return $count;
1015 }
1016
1017 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1018 sub pve_fw_verify_sport_spec {
1019    my ($portstr) = @_;
1020
1021    parse_port_name_number_or_range($portstr, 0);
1022
1023    return $portstr;
1024 }
1025
1026 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1027 sub pve_fw_verify_dport_spec {
1028    my ($portstr) = @_;
1029
1030    parse_port_name_number_or_range($portstr, 1);
1031
1032    return $portstr;
1033 }
1034
1035 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1036 sub pve_fw_verify_addr_spec {
1037    my ($list) = @_;
1038
1039    parse_address_list($list);
1040
1041    return $list;
1042 }
1043
1044 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1045 sub pve_fw_verify_protocol_spec {
1046    my ($proto) = @_;
1047
1048    my $protocols = get_etc_protocols();
1049
1050    die "unknown protocol '$proto'\n" if $proto &&
1051        !(defined($protocols->{byname}->{$proto}) ||
1052          defined($protocols->{byid}->{$proto}));
1053
1054    return $proto;
1055 }
1056
1057
1058 # helper function for API
1059
1060 sub copy_opject_with_digest {
1061     my ($object) = @_;
1062
1063     my $sha = Digest::SHA->new('sha1');
1064
1065     my $res = {};
1066     foreach my $k (sort keys %$object) {
1067         my $v = $object->{$k};
1068         next if !defined($v);
1069         $res->{$k} = $v;
1070         $sha->add($k, ':', $v, "\n");
1071     }
1072
1073     my $digest = $sha->hexdigest;
1074
1075     $res->{digest} = $digest;
1076
1077     return wantarray ? ($res, $digest) : $res;
1078 }
1079
1080 sub copy_list_with_digest {
1081     my ($list) = @_;
1082
1083     my $sha = Digest::SHA->new('sha1');
1084
1085     my $res = [];
1086     foreach my $entry (@$list) {
1087         my $data = {};
1088         foreach my $k (sort keys %$entry) {
1089             my $v = $entry->{$k};
1090             next if !defined($v);
1091             $data->{$k} = $v;
1092             # Note: digest ignores refs ($rule->{errors})
1093             # since Digest::SHA expects a series of bytes,
1094             #  we have to encode the value here to prevent errors when
1095             #  using utf8 characters (eg. in comments)
1096             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1097         }
1098         push @$res, $data;
1099     }
1100
1101     my $digest = $sha->hexdigest;
1102
1103     foreach my $entry (@$res) {
1104         $entry->{digest} = $digest;
1105     }
1106
1107     return wantarray ? ($res, $digest) : $res;
1108 }
1109
1110 our $cluster_option_properties = {
1111     enable => {
1112         description => "Enable or disable the firewall cluster wide.",
1113         type => 'integer',
1114         minimum => 0,
1115         optional => 1,
1116     },
1117     policy_in => {
1118         description => "Input policy.",
1119         type => 'string',
1120         optional => 1,
1121         enum => ['ACCEPT', 'REJECT', 'DROP'],
1122     },
1123     policy_out => {
1124         description => "Output policy.",
1125         type => 'string',
1126         optional => 1,
1127         enum => ['ACCEPT', 'REJECT', 'DROP'],
1128     },
1129 };
1130
1131 our $host_option_properties = {
1132     enable => {
1133         description => "Enable host firewall rules.",
1134         type => 'boolean',
1135         optional => 1,
1136     },
1137     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1138         description => "Log level for incoming traffic." }),
1139     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1140         description => "Log level for outgoing traffic." }),
1141     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1142         description => "Log level for illegal tcp flags filter." }),
1143     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1144         description => "Log level for SMURFS filter." }),
1145     nosmurfs => {
1146         description => "Enable SMURFS filter.",
1147         type => 'boolean',
1148         optional => 1,
1149     },
1150     tcpflags => {
1151         description => "Filter illegal combinations of TCP flags.",
1152         type => 'boolean',
1153         optional => 1,
1154     },
1155     nf_conntrack_max => {
1156         description => "Maximum number of tracked connections.",
1157         type => 'integer',
1158         optional => 1,
1159         minimum => 32768,
1160     },
1161     nf_conntrack_tcp_timeout_established => {
1162         description => "Conntrack established timeout.",
1163         type => 'integer',
1164         optional => 1,
1165         minimum => 7875,
1166     },
1167     ndp => {
1168         description => "Enable NDP.",
1169         type => 'boolean',
1170         optional => 1,
1171     },
1172 };
1173
1174 our $vm_option_properties = {
1175     enable => {
1176         description => "Enable/disable firewall rules.",
1177         type => 'boolean',
1178         optional => 1,
1179     },
1180     macfilter => {
1181         description => "Enable/disable MAC address filter.",
1182         type => 'boolean',
1183         optional => 1,
1184     },
1185     dhcp => {
1186         description => "Enable DHCP.",
1187         type => 'boolean',
1188         optional => 1,
1189     },
1190     ndp => {
1191         description => "Enable NDP.",
1192         type => 'boolean',
1193         optional => 1,
1194     },
1195     radv => {
1196         description => "Allow sending Router Advertisement.",
1197         type => 'boolean',
1198         optional => 1,
1199     },
1200     ipfilter => {
1201         description => "Enable default IP filters. " .
1202            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1203            "for every interface. Such ipsets implicitly contain sane default " .
1204            "restrictions such as restricting IPv6 link local addresses to " .
1205            "the one derived from the interface's MAC address. For containers " .
1206            "the configured IP addresses will be implicitly added.",
1207         type => 'boolean',
1208         optional => 1,
1209     },
1210     policy_in => {
1211         description => "Input policy.",
1212         type => 'string',
1213         optional => 1,
1214         enum => ['ACCEPT', 'REJECT', 'DROP'],
1215     },
1216     policy_out => {
1217         description => "Output policy.",
1218         type => 'string',
1219         optional => 1,
1220         enum => ['ACCEPT', 'REJECT', 'DROP'],
1221     },
1222     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1223         description => "Log level for incoming traffic." }),
1224     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1225         description => "Log level for outgoing traffic." }),
1226
1227 };
1228
1229
1230 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.";
1231
1232 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.";
1233
1234 my $rule_properties = {
1235     pos => {
1236         description => "Update rule at position <pos>.",
1237         type => 'integer',
1238         minimum => 0,
1239         optional => 1,
1240     },
1241     digest => get_standard_option('pve-config-digest'),
1242     type => {
1243         type => 'string',
1244         optional => 1,
1245         enum => ['in', 'out', 'group'],
1246     },
1247     action => {
1248         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1249         type => 'string',
1250         optional => 1,
1251         pattern => $security_group_name_pattern,
1252         maxLength => 20,
1253         minLength => 2,
1254     },
1255     macro => {
1256         type => 'string',
1257         optional => 1,
1258         maxLength => 128,
1259     },
1260     iface => get_standard_option('pve-iface', {
1261         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.",
1262         optional => 1
1263     }),
1264     source => {
1265         description => "Restrict packet source address. $addr_list_descr",
1266         type => 'string', format => 'pve-fw-addr-spec',
1267         optional => 1,
1268     },
1269     dest => {
1270         description => "Restrict packet destination address. $addr_list_descr",
1271         type => 'string', format => 'pve-fw-addr-spec',
1272         optional => 1,
1273     },
1274     proto => {
1275         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1276         type => 'string', format => 'pve-fw-protocol-spec',
1277         optional => 1,
1278     },
1279     enable => {
1280         type => 'integer',
1281         minimum => 0,
1282         optional => 1,
1283     },
1284     sport => {
1285         description => "Restrict TCP/UDP source port. $port_descr",
1286         type => 'string', format => 'pve-fw-sport-spec',
1287         optional => 1,
1288     },
1289     dport => {
1290         description => "Restrict TCP/UDP destination port. $port_descr",
1291         type => 'string', format => 'pve-fw-dport-spec',
1292         optional => 1,
1293     },
1294     comment => {
1295         type => 'string',
1296         optional => 1,
1297     },
1298 };
1299
1300 sub add_rule_properties {
1301     my ($properties) = @_;
1302
1303     foreach my $k (keys %$rule_properties) {
1304         my $h = $rule_properties->{$k};
1305         # copy data, so that we can modify later without side effects
1306         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1307     }
1308
1309     return $properties;
1310 }
1311
1312 sub delete_rule_properties {
1313     my ($rule, $delete_str) = @_;
1314
1315     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1316         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1317             if !defined($rule_properties->{$opt});
1318         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1319             if $opt eq 'type' || $opt eq 'action';
1320         delete $rule->{$opt};
1321     }
1322
1323     return $rule;
1324 }
1325
1326 my $apply_macro = sub {
1327     my ($macro_name, $param, $verify, $ipversion) = @_;
1328
1329     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1330     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1331
1332     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1333         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1334     }
1335
1336     # skip macros which are specific to another ipversion
1337     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1338         return if $ipversion != $required;
1339     }
1340
1341     my $rules = [];
1342
1343     foreach my $templ (@$macro_rules) {
1344         my $rule = {};
1345         my $param_used = {};
1346         foreach my $k (keys %$templ) {
1347             my $v = $templ->{$k};
1348             if ($v eq 'PARAM') {
1349                 $v = $param->{$k};
1350                 $param_used->{$k} = 1;
1351             } elsif ($v eq 'DEST') {
1352                 $v = $param->{dest};
1353                 $param_used->{dest} = 1;
1354             } elsif ($v eq 'SOURCE') {
1355                 $v = $param->{source};
1356                 $param_used->{source} = 1;
1357             }
1358
1359             if (!defined($v)) {
1360                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1361                 raise_param_exc({ macro => $msg }) if $verify;
1362                 die "$msg\n";
1363             }
1364             $rule->{$k} = $v;
1365         }
1366         foreach my $k (keys %$param) {
1367             next if $k eq 'macro';
1368             next if !defined($param->{$k});
1369             next if $param_used->{$k};
1370             if (defined($rule->{$k})) {
1371                 if ($rule->{$k} ne $param->{$k}) {
1372                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1373                     raise_param_exc({ $k => $msg }) if $verify;
1374                     die "$msg\n";
1375                 }
1376             } else {
1377                 $rule->{$k} = $param->{$k};
1378             }
1379         }
1380         push @$rules, $rule;
1381     }
1382
1383     return $rules;
1384 };
1385
1386 my $rule_env_iface_lookup = {
1387     'ct' => 1,
1388     'vm' => 1,
1389     'group' => 0,
1390     'cluster' => 1,
1391     'host' => 1,
1392 };
1393
1394 sub verify_rule {
1395     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1396
1397     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1398
1399     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1400     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1401
1402     my $errors = $rule->{errors} || {};
1403
1404     my $error_count = 0;
1405
1406     my $add_error = sub {
1407         my ($param, $msg)  = @_;
1408         chomp $msg;
1409         raise_param_exc({ $param => $msg }) if !$noerr;
1410         $error_count++;
1411         $errors->{$param} = $msg if !$errors->{$param};
1412     };
1413
1414     my $ipversion;
1415     my $set_ip_version = sub {
1416         my $vers = shift;
1417         if ($vers) {
1418             die "detected mixed ipv4/ipv6 adresses in rule\n"
1419                 if $ipversion && ($vers != $ipversion);
1420             $ipversion = $vers;
1421         }
1422     };
1423
1424     my $check_ipset_or_alias_property = sub {
1425         my ($name, $expected_ipversion) = @_;
1426
1427         if (my $value = $rule->{$name}) {
1428             if ($value =~ m/^\+/) {
1429                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1430                     &$add_error($name, "no such ipset '$1'")
1431                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1432
1433                 } else {
1434                     &$add_error($name, "invalid ipset name '$value'");
1435                 }
1436             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1437                 my $alias = lc($value);
1438                 &$add_error($name, "no such alias '$value'")
1439                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1440                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1441                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1442
1443                 &$set_ip_version($e->{ipversion});
1444             }
1445         }
1446     };
1447
1448     my $type = $rule->{type};
1449     my $action = $rule->{action};
1450
1451     &$add_error('type', "missing property") if !$type;
1452     &$add_error('action', "missing property") if !$action;
1453
1454     if ($type) {
1455         if ($type eq  'in' || $type eq 'out') {
1456             &$add_error('action', "unknown action '$action'")
1457                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1458         } elsif ($type eq 'group') {
1459             &$add_error('type', "security groups not allowed")
1460                 if !$allow_groups;
1461             &$add_error('action', "invalid characters in security group name")
1462                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1463         } else {
1464             &$add_error('type', "unknown rule type '$type'");
1465         }
1466     }
1467
1468     if ($rule->{iface}) {
1469         &$add_error('type', "parameter -i not allowed for this rule type")
1470             if !$allow_iface;
1471         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1472         &$add_error('iface', $@) if $@;
1473         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1474             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1475                 if $rule->{iface} !~  m/^net(\d+)$/;
1476         }
1477     }
1478
1479     if ($rule->{macro}) {
1480         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1481             $rule->{macro} = $preferred_name;
1482         } else {
1483             &$add_error('macro', "unknown macro '$rule->{macro}'");
1484         }
1485     }
1486
1487     if ($rule->{proto}) {
1488         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1489         &$add_error('proto', $@) if $@;
1490         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1491         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1492     }
1493
1494     if ($rule->{dport}) {
1495         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1496         &$add_error('dport', $@) if $@;
1497         &$add_error('proto', "missing property - 'dport' requires this property")
1498             if !$rule->{proto};
1499     }
1500
1501     if ($rule->{sport}) {
1502         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1503         &$add_error('sport', $@) if $@;
1504         &$add_error('proto', "missing property - 'sport' requires this property")
1505             if !$rule->{proto};
1506     }
1507
1508     if ($rule->{source}) {
1509         eval {
1510             my $source_ipversion = parse_address_list($rule->{source});
1511             &$set_ip_version($source_ipversion);
1512         };
1513         &$add_error('source', $@) if $@;
1514         &$check_ipset_or_alias_property('source', $ipversion);
1515     }
1516
1517     if ($rule->{dest}) {
1518         eval {
1519             my $dest_ipversion = parse_address_list($rule->{dest});
1520             &$set_ip_version($dest_ipversion);
1521         };
1522         &$add_error('dest', $@) if $@;
1523         &$check_ipset_or_alias_property('dest', $ipversion);
1524     }
1525
1526     $rule->{ipversion} = $ipversion if $ipversion;
1527
1528     if ($rule->{macro} && !$error_count) {
1529         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1530         if (my $err = $@) {
1531             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1532                 my $eh = $err->{errors};
1533                 foreach my $p (keys %$eh) {
1534                     &$add_error($p, $eh->{$p});
1535                 }
1536             } else {
1537                 &$add_error('macro', "$err");
1538             }
1539         }
1540     }
1541
1542     $rule->{errors} = $errors if $error_count;
1543
1544     return $rule;
1545 }
1546
1547 sub copy_rule_data {
1548     my ($rule, $param) = @_;
1549
1550     foreach my $k (keys %$rule_properties) {
1551         if (defined(my $v = $param->{$k})) {
1552             if ($v eq '' || $v eq '-') {
1553                 delete $rule->{$k};
1554             } else {
1555                 $rule->{$k} = $v;
1556             }
1557         }
1558     }
1559
1560     return $rule;
1561 }
1562
1563 sub rules_modify_permissions {
1564     my ($rule_env) = @_;
1565
1566     if ($rule_env eq 'host') {
1567         return {
1568             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1569         };
1570     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1571         return {
1572             check => ['perm', '/', [ 'Sys.Modify' ]],
1573         };
1574     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1575         return {
1576             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1577         }
1578     }
1579
1580     return undef;
1581 }
1582
1583 sub rules_audit_permissions {
1584     my ($rule_env) = @_;
1585
1586     if ($rule_env eq 'host') {
1587         return {
1588             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1589         };
1590     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1591         return {
1592             check => ['perm', '/', [ 'Sys.Audit' ]],
1593         };
1594     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1595         return {
1596             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1597         }
1598     }
1599
1600     return undef;
1601 }
1602
1603 # core functions
1604 my $bridge_firewall_enabled = 0;
1605
1606 sub enable_bridge_firewall {
1607
1608     return if $bridge_firewall_enabled; # only once
1609
1610     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1611     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1612
1613     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1614     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1615
1616     $bridge_firewall_enabled = 1;
1617 }
1618
1619 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1620
1621 sub iptables_restore_cmdlist {
1622     my ($cmdlist) = @_;
1623
1624     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1625 }
1626
1627 sub ip6tables_restore_cmdlist {
1628     my ($cmdlist) = @_;
1629
1630     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1631 }
1632
1633 sub ipset_restore_cmdlist {
1634     my ($cmdlist) = @_;
1635
1636     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1637 }
1638
1639 sub iptables_get_chains {
1640     my ($iptablescmd) = @_;
1641
1642     $iptablescmd = "iptables" if !$iptablescmd;
1643
1644     my $res = {};
1645
1646     # check what chains we want to track
1647     my $is_pvefw_chain = sub {
1648         my $name = shift;
1649
1650         return 1 if $name =~ m/^PVEFW-\S+$/;
1651
1652         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1653
1654         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1655
1656         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1657         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1658
1659         return undef;
1660     };
1661
1662     my $table = '';
1663
1664     my $hooks = {};
1665
1666     my $parser = sub {
1667         my $line = shift;
1668
1669         return if $line =~ m/^#/;
1670         return if $line =~ m/^\s*$/;
1671
1672         if ($line =~ m/^\*(\S+)$/) {
1673             $table = $1;
1674             return;
1675         }
1676
1677         return if $table ne 'filter';
1678
1679         if ($line =~ m/^:(\S+)\s/) {
1680             my $chain = $1;
1681             return if !&$is_pvefw_chain($chain);
1682             $res->{$chain} = "unknown";
1683         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1684             my ($chain, $sig) = ($1, $2);
1685             return if !&$is_pvefw_chain($chain);
1686             $res->{$chain} = $sig;
1687         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1688             $hooks->{$1} = 1;
1689         } else {
1690             # simply ignore the rest
1691             return;
1692         }
1693     };
1694
1695     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1696
1697     return wantarray ? ($res, $hooks) : $res;
1698 }
1699
1700 sub iptables_chain_digest {
1701     my ($rules) = @_;
1702     my $digest = Digest::SHA->new('sha1');
1703     foreach my $rule (@$rules) { # order is important
1704         $digest->add($rule);
1705     }
1706     return $digest->b64digest;
1707 }
1708
1709 sub ipset_chain_digest {
1710     my ($rules) = @_;
1711
1712     my $digest = Digest::SHA->new('sha1');
1713     foreach my $rule (sort @$rules) { # note: sorted
1714         $digest->add($rule);
1715     }
1716     return $digest->b64digest;
1717 }
1718
1719 sub ipset_get_chains {
1720
1721     my $res = {};
1722     my $chains = {};
1723
1724     my $parser = sub {
1725         my $line = shift;
1726
1727         return if $line =~ m/^#/;
1728         return if $line =~ m/^\s*$/;
1729         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1730             my $chain = $1;
1731             $line =~ s/\s+$//; # delete trailing white space
1732             push @{$chains->{$chain}}, $line;
1733         } else {
1734             # simply ignore the rest
1735             return;
1736         }
1737     };
1738
1739     run_command("/sbin/ipset save", outfunc => $parser);
1740
1741     # compute digest for each chain
1742     foreach my $chain (keys %$chains) {
1743         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1744     }
1745
1746     return $res;
1747 }
1748
1749 sub ruleset_generate_cmdstr {
1750     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1751
1752     return if defined($rule->{enable}) && !$rule->{enable};
1753     return if $rule->{errors};
1754
1755     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1756
1757     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1758     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1759
1760     my @cmd = ();
1761
1762     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1763     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1764
1765     my $source = $rule->{source};
1766     my $dest = $rule->{dest};
1767
1768     if ($source) {
1769         if ($source =~ m/^\+/) {
1770             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1771                 my $name = $1;
1772                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1773                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1774                     push @cmd, "-m set --match-set ${ipset_chain} src";
1775                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1776                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1777                     push @cmd, "-m set --match-set ${ipset_chain} src";
1778                 } else {
1779                     die "no such ipset '$name'\n";
1780                 }
1781             } else {
1782                 die "invalid security group name '$source'\n";
1783             }
1784         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1785             my $alias = lc($source);
1786             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1787             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1788             die "no such alias '$source'\n" if !$e;
1789             push @cmd, "-s $e->{cidr}";
1790         } elsif ($source =~ m/\-/){
1791             push @cmd, "-m iprange --src-range $source";
1792         } else {
1793             push @cmd, "-s $source";
1794         }
1795     }
1796
1797     if ($dest) {
1798         if ($dest =~ m/^\+/) {
1799             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1800                 my $name = $1;
1801                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1802                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1803                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1804                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1805                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1806                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1807                 } else {
1808                     die "no such ipset '$name'\n";
1809                 }
1810             } else {
1811                 die "invalid security group name '$dest'\n";
1812             }
1813         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1814             my $alias = lc($dest);
1815             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1816             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1817             die "no such alias '$dest'\n" if !$e;
1818             push @cmd, "-d $e->{cidr}";
1819         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1820             push @cmd, "-m iprange --dst-range $dest";
1821         } else {
1822             push @cmd, "-d $dest";
1823         }
1824     }
1825
1826     if ($rule->{proto}) {
1827         push @cmd, "-p $rule->{proto}";
1828
1829         my $multiport = 0;
1830         $multiport++ if $nbdport > 1;
1831         $multiport++ if $nbsport > 1;
1832
1833         push @cmd, "--match multiport" if $multiport;
1834
1835         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1836             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1837
1838         if ($rule->{dport}) {
1839             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1840                 # Note: we use dport to store --icmp-type
1841                 die "unknown icmp-type '$rule->{dport}'\n"
1842                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1843                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1844             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1845                 # Note: we use dport to store --icmpv6-type
1846                 die "unknown icmpv6-type '$rule->{dport}'\n"
1847                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1848                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1849             } else {
1850                 if ($nbdport > 1) {
1851                     if ($multiport == 2) {
1852                         push @cmd,  "--ports $rule->{dport}";
1853                     } else {
1854                         push @cmd, "--dports $rule->{dport}";
1855                     }
1856                 } else {
1857                     push @cmd, "--dport $rule->{dport}";
1858                 }
1859             }
1860         }
1861
1862         if ($rule->{sport}) {
1863             if ($nbsport > 1) {
1864                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1865             } else {
1866                 push @cmd, "--sport $rule->{sport}";
1867             }
1868         }
1869     } elsif ($rule->{dport} || $rule->{sport}) {
1870         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1871         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1872     }
1873
1874     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1875
1876     if (my $action = $rule->{action}) {
1877         $action = $actions->{$action} if defined($actions->{$action});
1878         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1879         push @cmd, $goto ? "-g $action" : "-j $action";
1880     }
1881
1882     return scalar(@cmd) ? join(' ', @cmd) : undef;
1883 }
1884
1885 sub ruleset_generate_rule {
1886     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1887
1888     my $rules;
1889
1890     if ($rule->{macro}) {
1891         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1892     } else {
1893         $rules = [ $rule ];
1894     }
1895
1896     # update all or nothing
1897
1898     my @cmds = ();
1899     foreach my $tmp (@$rules) {
1900         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1901             push @cmds, $cmdstr;
1902         }
1903     }
1904
1905     foreach my $cmdstr (@cmds) {
1906         ruleset_addrule($ruleset, $chain, $cmdstr);
1907     }
1908 }
1909
1910 sub ruleset_generate_rule_insert {
1911     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1912
1913     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1914
1915     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1916         ruleset_insertrule($ruleset, $chain, $cmdstr);
1917     }
1918 }
1919
1920 sub ruleset_create_chain {
1921     my ($ruleset, $chain) = @_;
1922
1923     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1924     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1925
1926     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1927
1928     $ruleset->{$chain} = [];
1929 }
1930
1931 sub ruleset_chain_exist {
1932     my ($ruleset, $chain) = @_;
1933
1934     return $ruleset->{$chain} ? 1 : undef;
1935 }
1936
1937 sub ruleset_addrule {
1938    my ($ruleset, $chain, $rule) = @_;
1939
1940    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1941
1942    push @{$ruleset->{$chain}}, "-A $chain $rule";
1943 }
1944
1945 sub ruleset_insertrule {
1946    my ($ruleset, $chain, $rule) = @_;
1947
1948    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1949
1950    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1951 }
1952
1953 sub get_log_rule_base {
1954     my ($chain, $vmid, $msg, $loglevel) = @_;
1955
1956     die "internal error - no log level" if !defined($loglevel);
1957
1958     $vmid = 0 if !defined($vmid);
1959
1960     # Note: we use special format for prefix to pass further
1961     # info to log daemon (VMID, LOGVELEL and CHAIN)
1962
1963     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1964 }
1965
1966 sub ruleset_addlog {
1967     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1968
1969     return if !defined($loglevel);
1970
1971     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1972
1973     $logrule = "$rule $logrule" if defined($rule);
1974
1975     ruleset_addrule($ruleset, $chain, $logrule);
1976 }
1977
1978 sub ruleset_add_chain_policy {
1979     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1980
1981     if ($policy eq 'ACCEPT') {
1982
1983         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1984                               { ACCEPT =>  $accept_action});
1985
1986     } elsif ($policy eq 'DROP') {
1987
1988         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1989
1990         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1991
1992         ruleset_addrule($ruleset, $chain, "-j DROP");
1993     } elsif ($policy eq 'REJECT') {
1994         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1995
1996         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1997
1998         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1999     } else {
2000         # should not happen
2001         die "internal error: unknown policy '$policy'";
2002     }
2003 }
2004
2005 sub ruleset_chain_add_ndp {
2006     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2007     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2008
2009     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2010     if ($direction ne 'OUT' || $options->{radv}) {
2011         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2012     }
2013     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2014     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2015 }
2016
2017 sub ruleset_chain_add_conn_filters {
2018     my ($ruleset, $chain, $accept) = @_;
2019
2020     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2021     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2022 }
2023
2024 sub ruleset_chain_add_input_filters {
2025     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2026
2027     if ($cluster_conf->{ipset}->{blacklist}){
2028         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2029             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2030             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2031             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2032         }
2033         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2034         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2035     }
2036
2037     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2038         if ($ipversion == 4) {
2039             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2040         }
2041     }
2042
2043     if ($options->{tcpflags}) {
2044         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2045     }
2046 }
2047
2048 sub ruleset_create_vm_chain {
2049     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2050
2051     ruleset_create_chain($ruleset, $chain);
2052     my $accept = generate_nfqueue($options);
2053
2054     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2055         if ($ipversion == 4) {
2056             if ($direction eq 'OUT') {
2057                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2058                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2059                                         proto => 'udp', sport => 68, dport => 67 });
2060             } else {
2061                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2062                                       { action => 'ACCEPT',
2063                                         proto => 'udp', sport => 67, dport => 68 });
2064             }
2065         } elsif ($ipversion == 6) {
2066             if ($direction eq 'OUT') {
2067                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2068                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2069                                         proto => 'udp', sport => 546, dport => 547 });
2070             } else {
2071                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2072                                       { action => 'ACCEPT',
2073                                         proto => 'udp', sport => 547, dport => 546 });
2074             }
2075         }
2076
2077     }
2078
2079     if ($direction eq 'OUT') {
2080         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2081             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2082         }
2083         if ($ipversion == 6 && !$options->{radv}) {
2084             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2085         }
2086         if ($ipfilter_ipset) {
2087             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2088         }
2089         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2090     }
2091
2092     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2093     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2094 }
2095
2096 sub ruleset_add_group_rule {
2097     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2098
2099     my $group = $rule->{action};
2100     my $group_chain = "GROUP-$group-$direction";
2101     if(!ruleset_chain_exist($ruleset, $group_chain)){
2102         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2103     }
2104
2105     if ($direction eq 'OUT' && $rule->{iface_out}) {
2106         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2107     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2108         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2109     } else {
2110         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2111     }
2112
2113     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2114 }
2115
2116 sub ruleset_generate_vm_rules {
2117     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2118
2119     my $lc_direction = lc($direction);
2120
2121     my $in_accept = generate_nfqueue($options);
2122
2123     foreach my $rule (@$rules) {
2124         next if $rule->{iface} && $rule->{iface} ne $netid;
2125         next if !$rule->{enable} || $rule->{errors};
2126         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2127
2128         if ($rule->{type} eq 'group') {
2129             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2130                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2131         } else {
2132             next if $rule->{type} ne $lc_direction;
2133             eval {
2134                 if ($direction eq 'OUT') {
2135                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2136                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2137                                           undef, $cluster_conf, $vmfw_conf);
2138                 } else {
2139                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2140                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2141                                           undef, $cluster_conf, $vmfw_conf);
2142                 }
2143             };
2144             warn $@ if $@;
2145         }
2146     }
2147 }
2148
2149 sub generate_nfqueue {
2150     my ($options) = @_;
2151
2152     if ($options->{ips}) {
2153         my $action = "NFQUEUE";
2154         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2155             if (defined($3) && defined($1)) {
2156                 $action .= " --queue-balance $1:$3";
2157             } elsif (defined($1)) {
2158                 $action .= " --queue-num $1";
2159             }
2160         }
2161         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2162         return $action;
2163     } else {
2164         return "ACCEPT";
2165     }
2166 }
2167
2168 sub ruleset_generate_vm_ipsrules {
2169     my ($ruleset, $options, $direction, $iface) = @_;
2170
2171     if ($options->{ips} && $direction eq 'IN') {
2172         my $nfqueue = generate_nfqueue($options);
2173
2174         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2175             ruleset_create_chain($ruleset, "PVEFW-IPS");
2176         }
2177
2178         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2179     }
2180 }
2181
2182 sub generate_tap_rules_direction {
2183     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2184
2185     my $lc_direction = lc($direction);
2186
2187     my $rules = $vmfw_conf->{rules};
2188
2189     my $options = $vmfw_conf->{options};
2190     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2191
2192     my $tapchain = "$iface-$direction";
2193
2194     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2195     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2196         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2197
2198     # create chain with mac and ip filter
2199     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2200
2201     if ($options->{enable}) {
2202         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2203
2204         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2205
2206         # implement policy
2207         my $policy;
2208
2209         if ($direction eq 'OUT') {
2210             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2211         } else {
2212         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2213         }
2214
2215         my $accept = generate_nfqueue($options);
2216         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2217         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2218     } else {
2219         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2220         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2221     }
2222
2223     # plug the tap chain to bridge chain
2224     if ($direction eq 'IN') {
2225         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2226                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2227     } else {
2228         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2229                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2230     }
2231 }
2232
2233 sub enable_host_firewall {
2234     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2235
2236     my $options = $hostfw_conf->{options};
2237     my $cluster_options = $cluster_conf->{options};
2238     my $rules = $hostfw_conf->{rules};
2239     my $cluster_rules = $cluster_conf->{rules};
2240
2241     # host inbound firewall
2242     my $chain = "PVEFW-HOST-IN";
2243     ruleset_create_chain($ruleset, $chain);
2244
2245     my $loglevel = get_option_log_level($options, "log_level_in");
2246
2247     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2248
2249     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2250     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2251     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2252
2253     # we use RETURN because we need to check also tap rules
2254     my $accept_action = 'RETURN';
2255
2256     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2257
2258     # add host rules first, so that cluster wide rules can be overwritten
2259     foreach my $rule (@$rules, @$cluster_rules) {
2260         next if !$rule->{enable} || $rule->{errors};
2261         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2262
2263         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2264
2265         eval {
2266             if ($rule->{type} eq 'group') {
2267                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2268             } elsif ($rule->{type} eq 'in') {
2269                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2270                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2271                                       undef, $cluster_conf, $hostfw_conf);
2272             }
2273         };
2274         warn $@ if $@;
2275         delete $rule->{iface_in};
2276     }
2277
2278     # allow standard traffic for management ipset (includes cluster network)
2279     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2280     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2281     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2282     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2283     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2284     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2285
2286     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2287     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2288
2289     # corosync
2290     if ($localnet && ($ipversion == $localnet_ver)) {
2291         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2292         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2293         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2294     }
2295
2296     # implement input policy
2297     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2298     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2299
2300     # host outbound firewall
2301     $chain = "PVEFW-HOST-OUT";
2302     ruleset_create_chain($ruleset, $chain);
2303
2304     $loglevel = get_option_log_level($options, "log_level_out");
2305
2306     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2307
2308     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2309
2310     # we use RETURN because we may want to check other thigs later
2311     $accept_action = 'RETURN';
2312     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2313
2314     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2315
2316     # add host rules first, so that cluster wide rules can be overwritten
2317     foreach my $rule (@$rules, @$cluster_rules) {
2318         next if !$rule->{enable} || $rule->{errors};
2319         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2320
2321         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2322         eval {
2323             if ($rule->{type} eq 'group') {
2324                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2325             } elsif ($rule->{type} eq 'out') {
2326                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2327                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2328                                       undef, $cluster_conf, $hostfw_conf);
2329             }
2330         };
2331         warn $@ if $@;
2332         delete $rule->{iface_out};
2333     }
2334
2335     # allow standard traffic on cluster network
2336     if ($localnet && ($ipversion == $localnet_ver)) {
2337         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2338         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2339         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2340         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2341
2342         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2343         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2344         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2345     }
2346
2347     # implement output policy
2348     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2349     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2350
2351     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2352     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2353 }
2354
2355 sub generate_group_rules {
2356     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2357
2358     my $rules = $cluster_conf->{groups}->{$group};
2359
2360     if (!$rules) {
2361         warn "no such security group '$group'\n";
2362         $rules = []; # create empty chain
2363     }
2364
2365     my $chain = "GROUP-${group}-IN";
2366
2367     ruleset_create_chain($ruleset, $chain);
2368     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2369
2370     foreach my $rule (@$rules) {
2371         next if $rule->{type} ne 'in';
2372         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2373         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2374                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2375                               undef, $cluster_conf);
2376     }
2377
2378     $chain = "GROUP-${group}-OUT";
2379
2380     ruleset_create_chain($ruleset, $chain);
2381     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2382
2383     foreach my $rule (@$rules) {
2384         next if $rule->{type} ne 'out';
2385         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2386         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2387         # check also other tap rules later
2388         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2389                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2390                               undef, $cluster_conf);
2391     }
2392 }
2393
2394 my $MAX_NETS = 32;
2395 my $valid_netdev_names = {};
2396 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2397     $valid_netdev_names->{"net$i"} = 1;
2398 }
2399
2400 sub get_mark_values {
2401     my ($value, $mask) = @_;
2402     $value = hex($value) if $value =~ /^0x/;
2403     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2404     $mask = 0xffffffff if !defined($mask);
2405     return ($value, $mask);
2406 }
2407
2408 sub parse_fw_rule {
2409     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2410
2411     my $orig_line = $line;
2412
2413     my $rule = {};
2414
2415     # we can add single line comments to the end of the rule
2416     if ($line =~ s/#\s*(.*?)\s*$//) {
2417         $rule->{comment} = decode('utf8', $1);
2418     }
2419
2420     # we can disable a rule when prefixed with '|'
2421
2422     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2423
2424     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2425         die "unable to parse rule: $line\n";
2426
2427     $rule->{type} = lc($1);
2428     $rule->{action} = $2;
2429
2430     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2431         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2432             $rule->{macro} = $1;
2433             $rule->{action} = $2;
2434         }
2435     }
2436
2437     while (length($line)) {
2438         if ($line =~ s/^-i (\S+)\s*//) {
2439             $rule->{iface} = $1;
2440             next;
2441         }
2442
2443         last if $rule->{type} eq 'group';
2444
2445         if ($line =~ s/^-p (\S+)\s*//) {
2446             $rule->{proto} = $1;
2447             next;
2448         }
2449
2450         if ($line =~ s/^-dport (\S+)\s*//) {
2451             $rule->{dport} = $1;
2452             next;
2453         }
2454
2455         if ($line =~ s/^-sport (\S+)\s*//) {
2456             $rule->{sport} = $1;
2457             next;
2458         }
2459         if ($line =~ s/^-source (\S+)\s*//) {
2460             $rule->{source} = $1;
2461             next;
2462         }
2463         if ($line =~ s/^-dest (\S+)\s*//) {
2464             $rule->{dest} = $1;
2465             next;
2466         }
2467
2468         last;
2469     }
2470
2471     die "unable to parse rule parameters: $line\n" if length($line);
2472
2473     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2474     if ($verbose && $rule->{errors}) {
2475         warn "$prefix - errors in rule parameters: $orig_line\n";
2476         foreach my $p (keys %{$rule->{errors}}) {
2477             warn "  $p: $rule->{errors}->{$p}\n";
2478         }
2479     }
2480
2481     return $rule;
2482 }
2483
2484 sub parse_vmfw_option {
2485     my ($line) = @_;
2486
2487     my ($opt, $value);
2488
2489     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2490
2491     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2492         $opt = lc($1);
2493         $value = int($2);
2494     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2495         $opt = lc($1);
2496         $value = $2 ? lc($3) : '';
2497     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2498         $opt = lc($1);
2499         $value = uc($3);
2500     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2501         $opt = lc($1);
2502         $value = $2;
2503     } else {
2504         die "can't parse option '$line'\n"
2505     }
2506
2507     return ($opt, $value);
2508 }
2509
2510 sub parse_hostfw_option {
2511     my ($line) = @_;
2512
2513     my ($opt, $value);
2514
2515     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2516
2517     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2518         $opt = lc($1);
2519         $value = int($2);
2520     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2521         $opt = lc($1);
2522         $value = $2 ? lc($3) : '';
2523     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2524         $opt = lc($1);
2525         $value = int($2);
2526     } else {
2527         die "can't parse option '$line'\n"
2528     }
2529
2530     return ($opt, $value);
2531 }
2532
2533 sub parse_clusterfw_option {
2534     my ($line) = @_;
2535
2536     my ($opt, $value);
2537
2538     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2539         $opt = lc($1);
2540         $value = int($2);
2541         if (($value > 1) && ((time() - $value) > 60)) {
2542             $value = 0
2543         }
2544     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2545         $opt = lc($1);
2546         $value = uc($3);
2547     } else {
2548         die "can't parse option '$line'\n"
2549     }
2550
2551     return ($opt, $value);
2552 }
2553
2554 sub resolve_alias {
2555     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2556
2557     my $alias = lc($cidr);
2558     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2559     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2560
2561     die "no such alias '$cidr'\n" if !$e;;
2562
2563     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2564 }
2565
2566 sub parse_ip_or_cidr {
2567     my ($cidr) = @_;
2568
2569     my $ipversion;
2570
2571     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2572         $cidr =~ s|/128$||;
2573         $ipversion = 6;
2574     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2575         $cidr =~ s|/32$||;
2576         $ipversion = 4;
2577     } else {
2578         die "value does not look like a valid IP address or CIDR network\n";
2579     }
2580
2581     return wantarray ? ($cidr, $ipversion) : $cidr;
2582 }
2583
2584 sub parse_alias {
2585     my ($line) = @_;
2586
2587     # we can add single line comments to the end of the line
2588     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2589
2590     if ($line =~ m/^(\S+)\s(\S+)$/) {
2591         my ($name, $cidr) = ($1, $2);
2592         my $ipversion;
2593
2594         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2595
2596         my $data = {
2597             name => $name,
2598             cidr => $cidr,
2599             ipversion => $ipversion,
2600         };
2601         $data->{comment} = $comment  if $comment;
2602         return $data;
2603     }
2604
2605     return undef;
2606 }
2607
2608 sub generic_fw_config_parser {
2609     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2610
2611     my $section;
2612     my $group;
2613
2614     my $res = $empty_conf;
2615
2616     while (defined(my $line = <$fh>)) {
2617         next if $line =~ m/^#/;
2618         next if $line =~ m/^\s*$/;
2619
2620         chomp $line;
2621
2622         my $linenr = $fh->input_line_number();
2623         my $prefix = "$filename (line $linenr)";
2624
2625         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2626             $section = 'options';
2627             next;
2628         }
2629
2630         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2631             $section = 'aliases';
2632             next;
2633         }
2634
2635         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2636             $section = 'groups';
2637             $group = lc($1);
2638             my $comment = $2;
2639             eval {
2640                 die "security group name too long\n" if length($group) > $max_group_name_length;
2641                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2642             };
2643             if (my $err = $@) {
2644                 ($section, $group, $comment) = undef;
2645                 warn "$prefix: $err";
2646                 next;
2647             }
2648
2649             $res->{$section}->{$group} = [];
2650             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2651                 if $comment;
2652             next;
2653         }
2654
2655         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2656             $section = 'rules';
2657             next;
2658         }
2659
2660         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2661             $section = 'ipset';
2662             $group = lc($1);
2663             my $comment = $2;
2664             eval {
2665                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2666                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2667             };
2668             if (my $err = $@) {
2669                 ($section, $group, $comment) = undef;
2670                 warn "$prefix: $err";
2671                 next;
2672             }
2673
2674             $res->{$section}->{$group} = [];
2675             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2676                 if $comment;
2677             next;
2678         }
2679
2680         if (!$section) {
2681             warn "$prefix: skip line - no section\n";
2682             next;
2683         }
2684
2685         if ($section eq 'options') {
2686             eval {
2687                 my ($opt, $value);
2688                 if ($rule_env eq 'cluster') {
2689                     ($opt, $value) = parse_clusterfw_option($line);
2690                 } elsif ($rule_env eq 'host') {
2691                     ($opt, $value) = parse_hostfw_option($line);
2692                 } else {
2693                     ($opt, $value) = parse_vmfw_option($line);
2694                 }
2695                 $res->{options}->{$opt} = $value;
2696             };
2697             warn "$prefix: $@" if $@;
2698         } elsif ($section eq 'aliases') {
2699             eval {
2700                 my $data = parse_alias($line);
2701                 $res->{aliases}->{lc($data->{name})} = $data;
2702             };
2703             warn "$prefix: $@" if $@;
2704         } elsif ($section eq 'rules') {
2705             my $rule;
2706             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2707             if (my $err = $@) {
2708                 warn "$prefix: $err";
2709                 next;
2710             }
2711             push @{$res->{$section}}, $rule;
2712         } elsif ($section eq 'groups') {
2713             my $rule;
2714             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2715             if (my $err = $@) {
2716                 warn "$prefix: $err";
2717                 next;
2718             }
2719             push @{$res->{$section}->{$group}}, $rule;
2720         } elsif ($section eq 'ipset') {
2721             # we can add single line comments to the end of the rule
2722             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2723
2724             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2725             my $nomatch = $1;
2726             my $cidr = $2;
2727             my $errors;
2728
2729             if ($nomatch && !$feature_ipset_nomatch) {
2730                 $errors->{nomatch} = "nomatch not supported by kernel";
2731             }
2732
2733             eval {
2734                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2735                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2736                 } else {
2737                     $cidr = parse_ip_or_cidr($cidr);
2738                 }
2739             };
2740             if (my $err = $@) {
2741                 chomp $err;
2742                 $errors->{cidr} = $err;
2743             }
2744
2745             my $entry = { cidr => $cidr };
2746             $entry->{nomatch} = 1 if $nomatch;
2747             $entry->{comment} = $comment if $comment;
2748             $entry->{errors} =  $errors if $errors;
2749
2750             if ($verbose && $errors) {
2751                 warn "$prefix - errors in ipset '$group': $line\n";
2752                 foreach my $p (keys %{$errors}) {
2753                     warn "  $p: $errors->{$p}\n";
2754                 }
2755             }
2756
2757             push @{$res->{$section}->{$group}}, $entry;
2758         } else {
2759             warn "$prefix: skip line - unknown section\n";
2760             next;
2761         }
2762     }
2763
2764     return $res;
2765 }
2766
2767 sub parse_hostfw_config {
2768     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2769
2770     my $empty_conf = { rules => [], options => {}};
2771
2772     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2773 }
2774
2775 sub parse_vmfw_config {
2776     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2777
2778     my $empty_conf = {
2779         rules => [],
2780         options => {},
2781         aliases => {},
2782         ipset => {} ,
2783         ipset_comments => {},
2784     };
2785
2786     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2787 }
2788
2789 sub parse_clusterfw_config {
2790     my ($filename, $fh, $verbose) = @_;
2791
2792     my $section;
2793     my $group;
2794
2795     my $empty_conf = {
2796         rules => [],
2797         options => {},
2798         aliases => {},
2799         groups => {},
2800         group_comments => {},
2801         ipset => {} ,
2802         ipset_comments => {},
2803     };
2804
2805     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2806 }
2807
2808 sub run_locked {
2809     my ($code, @param) = @_;
2810
2811     my $timeout = 10;
2812
2813     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2814
2815     die $@ if $@;
2816
2817     return $res;
2818 }
2819
2820 sub read_local_vm_config {
2821
2822     my $qemu = {};
2823     my $lxc = {};
2824
2825     my $vmdata = { qemu => $qemu, lxc => $lxc };
2826
2827     my $vmlist = PVE::Cluster::get_vmlist();
2828     return $vmdata if !$vmlist || !$vmlist->{ids};
2829     my $ids = $vmlist->{ids};
2830
2831     foreach my $vmid (keys %$ids) {
2832         next if !$vmid; # skip VE0
2833         my $d = $ids->{$vmid};
2834         next if !$d->{node} || $d->{node} ne $nodename;
2835         next if !$d->{type};
2836         if ($d->{type} eq 'qemu') {
2837             if ($have_qemu_server) {
2838                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2839                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2840                     $qemu->{$vmid} = $conf;
2841                 }
2842             }
2843         } elsif ($d->{type} eq 'lxc') {
2844             if ($have_lxc) {
2845                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2846                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2847                     $lxc->{$vmid} = $conf;
2848                 }
2849             }
2850         }
2851     }
2852
2853     return $vmdata;
2854 };
2855
2856 sub load_vmfw_conf {
2857     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2858
2859     my $vmfw_conf = {};
2860
2861     $dir = $pvefw_conf_dir if !defined($dir);
2862
2863     my $filename = "$dir/$vmid.fw";
2864     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2865         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2866         $vmfw_conf->{vmid} = $vmid;
2867     }
2868
2869     return $vmfw_conf;
2870 }
2871
2872 my $format_rules = sub {
2873     my ($rules, $allow_iface) = @_;
2874
2875     my $raw = '';
2876
2877     foreach my $rule (@$rules) {
2878         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2879             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2880             $raw .= uc($rule->{type});
2881             if ($rule->{macro}) {
2882                 $raw .= " $rule->{macro}($rule->{action})";
2883             } else {
2884                 $raw .= " " . $rule->{action};
2885             }
2886             if ($allow_iface && $rule->{iface}) {
2887                 $raw .= " -i $rule->{iface}";
2888             }
2889
2890             if ($rule->{type} ne  'group')  {
2891                 $raw .= " -source $rule->{source}" if $rule->{source};
2892                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2893                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2894                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2895                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2896             }
2897
2898             $raw .= " # " . encode('utf8', $rule->{comment})
2899                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2900             $raw .= "\n";
2901         } else {
2902             die "unknown rule type '$rule->{type}'";
2903         }
2904     }
2905
2906     return $raw;
2907 };
2908
2909 my $format_options = sub {
2910     my ($options) = @_;
2911
2912     my $raw = '';
2913
2914     $raw .= "[OPTIONS]\n\n";
2915     foreach my $opt (keys %$options) {
2916         $raw .= "$opt: $options->{$opt}\n";
2917     }
2918     $raw .= "\n";
2919
2920     return $raw;
2921 };
2922
2923 my $format_aliases = sub {
2924     my ($aliases) = @_;
2925
2926     my $raw = '';
2927
2928     $raw .= "[ALIASES]\n\n";
2929     foreach my $k (keys %$aliases) {
2930         my $e = $aliases->{$k};
2931         $raw .= "$e->{name} $e->{cidr}";
2932         $raw .= " # " . encode('utf8', $e->{comment})
2933             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2934         $raw .= "\n";
2935     }
2936     $raw .= "\n";
2937
2938     return $raw;
2939 };
2940
2941 my $format_ipsets = sub {
2942     my ($fw_conf) = @_;
2943
2944     my $raw = '';
2945
2946     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2947         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2948             my $utf8comment = encode('utf8', $comment);
2949             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2950         } else {
2951             $raw .= "[IPSET $ipset]\n\n";
2952         }
2953         my $options = $fw_conf->{ipset}->{$ipset};
2954
2955         my $nethash = {};
2956         foreach my $entry (@$options) {
2957             $nethash->{$entry->{cidr}} = $entry;
2958         }
2959
2960         foreach my $cidr (sort keys %$nethash) {
2961             my $entry = $nethash->{$cidr};
2962             my $line = $entry->{nomatch} ? '!' : '';
2963             $line .= $entry->{cidr};
2964             $line .= " # " . encode('utf8', $entry->{comment})
2965                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2966             $raw .= "$line\n";
2967         }
2968
2969         $raw .= "\n";
2970     }
2971
2972     return $raw;
2973 };
2974
2975 sub save_vmfw_conf {
2976     my ($vmid, $vmfw_conf) = @_;
2977
2978     my $raw = '';
2979
2980     my $options = $vmfw_conf->{options};
2981     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2982
2983     my $aliases = $vmfw_conf->{aliases};
2984     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2985
2986     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2987
2988     my $rules = $vmfw_conf->{rules} || [];
2989     if ($rules && scalar(@$rules)) {
2990         $raw .= "[RULES]\n\n";
2991         $raw .= &$format_rules($rules, 1);
2992         $raw .= "\n";
2993     }
2994
2995     my $filename = "$pvefw_conf_dir/$vmid.fw";
2996     if ($raw) {
2997         mkdir $pvefw_conf_dir;
2998         PVE::Tools::file_set_contents($filename, $raw);
2999     } else {
3000         unlink $filename;
3001     }
3002 }
3003
3004 sub remove_vmfw_conf {
3005     my ($vmid) = @_;
3006
3007     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3008
3009     unlink $vmfw_conffile;
3010 }
3011
3012 sub clone_vmfw_conf {
3013     my ($vmid, $newid) = @_;
3014
3015     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3016     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3017
3018     if (-f $clonevm_conffile) {
3019         unlink $clonevm_conffile;
3020     }
3021     if (-f $sourcevm_conffile) {
3022         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3023         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3024     }
3025 }
3026
3027 sub read_vm_firewall_configs {
3028     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3029
3030     my $vmfw_configs = {};
3031
3032     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3033         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3034         next if !$vmfw_conf->{options}; # skip if file does not exists
3035         $vmfw_configs->{$vmid} = $vmfw_conf;
3036     }
3037     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3038         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3039         next if !$vmfw_conf->{options}; # skip if file does not exists
3040         $vmfw_configs->{$vmid} = $vmfw_conf;
3041     }
3042
3043     return $vmfw_configs;
3044 }
3045
3046 sub get_option_log_level {
3047     my ($options, $k) = @_;
3048
3049     my $v = $options->{$k};
3050     $v = $default_log_level if !defined($v);
3051
3052     return undef if $v eq '' || $v eq 'nolog';
3053
3054     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3055
3056     return $v if ($v >= 0) && ($v <= 7);
3057
3058     warn "unknown log level ($k = '$v')\n";
3059
3060     return undef;
3061 }
3062
3063 sub generate_std_chains {
3064     my ($ruleset, $options, $ipversion) = @_;
3065
3066     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3067
3068     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3069
3070     my $chain;
3071
3072     if ($ipversion == 4) {
3073         # same as shorewall smurflog.
3074         $chain = 'PVEFW-smurflog';
3075         $std_chains->{$chain} = [];
3076
3077         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3078         push @{$std_chains->{$chain}}, "-j DROP";
3079     }
3080
3081     # same as shorewall logflags action.
3082     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3083     $chain = 'PVEFW-logflags';
3084     $std_chains->{$chain} = [];
3085
3086     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3087     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3088     push @{$std_chains->{$chain}}, "-j DROP";
3089
3090     foreach my $chain (keys %$std_chains) {
3091         ruleset_create_chain($ruleset, $chain);
3092         foreach my $rule (@{$std_chains->{$chain}}) {
3093             if (ref($rule)) {
3094                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3095             } else {
3096                 ruleset_addrule($ruleset, $chain, $rule);
3097             }
3098         }
3099     }
3100 }
3101
3102 sub generate_ipset_chains {
3103     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3104
3105     foreach my $ipset (keys %{$ipsets}) {
3106
3107         my $options = $ipsets->{$ipset};
3108
3109         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3110             if (my $ips = $device_ips->{$1}) {
3111                 $options = [@$options, @$ips];
3112             }
3113         }
3114
3115         # remove duplicates
3116         my $nethash = {};
3117         foreach my $entry (@$options) {
3118             next if $entry->{errors}; # skip entries with errors
3119             eval {
3120                 my ($cidr, $ver);
3121                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3122                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3123                 } else {
3124                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3125                 }
3126                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3127                 if ($ver == 6) {
3128                     # ip_compress_address takes an address only, no CIDR
3129                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3130                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3131                     $cidr .= $prefix_len if defined($prefix_len);
3132                     $cidr =~ s|/128$||;
3133                 } else {
3134                     $cidr =~ s|/32$||;
3135                 }
3136
3137                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3138             };
3139             warn $@ if $@;
3140         }
3141
3142         foreach my $ipversion (4, 6) {
3143             my $data = $nethash->{$ipversion};
3144
3145             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3146
3147             my $hashsize = scalar(@$options);
3148             if ($hashsize <= 64) {
3149                 $hashsize = 64;
3150             } else {
3151                 $hashsize = round_powerof2($hashsize);
3152             }
3153
3154             my $family = $ipversion == "6" ? "inet6" : "inet";
3155
3156             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3157
3158             foreach my $cidr (sort keys %$data) {
3159                 my $entry = $data->{$cidr};
3160
3161                 my $cmd = "add $name $cidr";
3162                 if ($entry->{nomatch}) {
3163                     if ($feature_ipset_nomatch) {
3164                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3165                     } else {
3166                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3167                     }
3168                 } else {
3169                     push @{$ipset_ruleset->{$name}}, $cmd;
3170                 }
3171             }
3172         }
3173     }
3174 }
3175
3176 sub round_powerof2 {
3177     my ($int) = @_;
3178
3179     $int--;
3180     $int |= $int >> $_ foreach (1,2,4,8,16);
3181     return ++$int;
3182 }
3183
3184 sub load_clusterfw_conf {
3185     my ($filename, $verbose) = @_;
3186
3187     $filename = $clusterfw_conf_filename if !defined($filename);
3188
3189     my $cluster_conf = {};
3190     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3191         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3192     }
3193
3194     return $cluster_conf;
3195 }
3196
3197 sub save_clusterfw_conf {
3198     my ($cluster_conf) = @_;
3199
3200     my $raw = '';
3201
3202     my $options = $cluster_conf->{options};
3203     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3204
3205     my $aliases = $cluster_conf->{aliases};
3206     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3207
3208     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3209
3210     my $rules = $cluster_conf->{rules};
3211     if ($rules && scalar(@$rules)) {
3212         $raw .= "[RULES]\n\n";
3213         $raw .= &$format_rules($rules, 1);
3214         $raw .= "\n";
3215     }
3216
3217     if ($cluster_conf->{groups}) {
3218         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3219             my $rules = $cluster_conf->{groups}->{$group};
3220             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3221                 my $utf8comment = encode('utf8', $comment);
3222                 $raw .= "[group $group] # $utf8comment\n\n";
3223             } else {
3224                 $raw .= "[group $group]\n\n";
3225             }
3226
3227             $raw .= &$format_rules($rules, 0);
3228             $raw .= "\n";
3229         }
3230     }
3231
3232     if ($raw) {
3233         mkdir $pvefw_conf_dir;
3234         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3235     } else {
3236         unlink $clusterfw_conf_filename;
3237     }
3238 }
3239
3240 sub load_hostfw_conf {
3241     my ($cluster_conf, $filename, $verbose) = @_;
3242
3243     $filename = $hostfw_conf_filename if !defined($filename);
3244
3245     my $hostfw_conf = {};
3246     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3247         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3248     }
3249     return $hostfw_conf;
3250 }
3251
3252 sub save_hostfw_conf {
3253     my ($hostfw_conf) = @_;
3254
3255     my $raw = '';
3256
3257     my $options = $hostfw_conf->{options};
3258     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3259
3260     my $rules = $hostfw_conf->{rules};
3261     if ($rules && scalar(@$rules)) {
3262         $raw .= "[RULES]\n\n";
3263         $raw .= &$format_rules($rules, 1);
3264         $raw .= "\n";
3265     }
3266
3267     if ($raw) {
3268         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3269     } else {
3270         unlink $hostfw_conf_filename;
3271     }
3272 }
3273
3274 sub compile {
3275     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3276
3277     my $vmfw_configs;
3278
3279     if ($vmdata) { # test mode
3280         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3281         my $filename = "$testdir/cluster.fw";
3282         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3283
3284         $filename = "$testdir/host.fw";
3285         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3286
3287         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3288     } else { # normal operation
3289         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3290
3291         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3292
3293         $vmdata = read_local_vm_config();
3294         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3295     }
3296
3297     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3298
3299     my $localnet;
3300     if ($cluster_conf->{aliases}->{local_network}) {
3301         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3302     } else {
3303         my $localnet_ver;
3304         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3305
3306         $cluster_conf->{aliases}->{local_network} = {
3307             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3308     }
3309
3310     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3311
3312     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3313     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3314     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3315
3316     return ($ruleset, $ipset_ruleset, $rulesetv6);
3317 }
3318
3319 sub compile_iptables_filter {
3320     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3321
3322     my $ruleset = {};
3323
3324     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3325     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3326
3327     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3328
3329     my $hostfw_options = $hostfw_conf->{options} || {};
3330
3331     # fixme: what log level should we use here?
3332     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3333
3334     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3335
3336     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3337     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3338
3339     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3340
3341     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3342     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3343
3344     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3345
3346     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3347
3348     if ($hostfw_enable) {
3349         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3350         warn $@ if $@; # just to be sure - should not happen
3351     }
3352
3353     # generate firewall rules for QEMU VMs
3354     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3355         eval {
3356             my $conf = $vmdata->{qemu}->{$vmid};
3357             my $vmfw_conf = $vmfw_configs->{$vmid};
3358             return if !$vmfw_conf;
3359
3360             foreach my $netid (sort keys %$conf) {
3361                 next if $netid !~ m/^net(\d+)$/;
3362                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3363                 next if !$net->{firewall};
3364                 my $iface = "tap${vmid}i$1";
3365
3366                 my $macaddr = $net->{macaddr};
3367                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3368                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3369                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3370                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3371             }
3372         };
3373         warn $@ if $@; # just to be sure - should not happen
3374     }
3375
3376     # generate firewall rules for LXC containers
3377     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3378         eval {
3379             my $conf = $vmdata->{lxc}->{$vmid};
3380             my $vmfw_conf = $vmfw_configs->{$vmid};
3381             return if !$vmfw_conf;
3382
3383             if ($vmfw_conf->{options}->{enable}) {
3384                 foreach my $netid (sort keys %$conf) {
3385                     next if $netid !~ m/^net(\d+)$/;
3386                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3387                     next if !$net->{firewall};
3388                     my $iface = "veth${vmid}i$1";
3389                     my $macaddr = $net->{hwaddr};
3390                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3391                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3392                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3393                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3394                 }
3395             }
3396         };
3397         warn $@ if $@; # just to be sure - should not happen
3398     }
3399
3400     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3401         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3402     }
3403
3404     return $ruleset;
3405 }
3406
3407 sub mac_to_linklocal {
3408     my ($macaddr) = @_;
3409     my @parts = split(/:/, $macaddr);
3410     # The standard link local address uses the fe80::/64 prefix with the
3411     # modified EUI-64 identifier derived from the MAC address by flipping the
3412     # universal/local bit and inserting FF:FE in the middle.
3413     # See RFC 4291.
3414     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3415     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3416     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3417 }
3418
3419 sub compile_ipsets {
3420     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3421
3422     my $localnet;
3423     if ($cluster_conf->{aliases}->{local_network}) {
3424         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3425     } else {
3426         my $localnet_ver;
3427         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3428
3429         $cluster_conf->{aliases}->{local_network} = {
3430             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3431     }
3432
3433     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3434
3435
3436     my $ipset_ruleset = {};
3437
3438     # generate ipsets for QEMU VMs
3439     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3440         eval {
3441             my $conf = $vmdata->{qemu}->{$vmid};
3442             my $vmfw_conf = $vmfw_configs->{$vmid};
3443             return if !$vmfw_conf;
3444
3445             # When the 'ipfilter' option is enabled every device for which there
3446             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3447             # ipset.
3448             # The reason is that ipfilter ipsets are always filled with standard
3449             # IPv6 link-local filters.
3450             my $ipsets = $vmfw_conf->{ipset};
3451             my $implicit_sets = {};
3452
3453             my $device_ips = {};
3454             foreach my $netid (keys %$conf) {
3455                 next if $netid !~ m/^net(\d+)$/;
3456                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3457                 next if !$net->{firewall};
3458
3459                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3460                     $implicit_sets->{"ipfilter-$netid"} = [];
3461                 }
3462
3463                 my $macaddr = $net->{macaddr};
3464                 my $linklocal = mac_to_linklocal($macaddr);
3465                 $device_ips->{$netid} = [
3466                     { cidr => $linklocal },
3467                     { cidr => 'fe80::/10', nomatch => 1 }
3468                 ];
3469             }
3470
3471             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3472             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3473         };
3474         warn $@ if $@; # just to be sure - should not happen
3475     }
3476
3477     # generate firewall rules for LXC containers
3478     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3479         eval {
3480             my $conf = $vmdata->{lxc}->{$vmid};
3481             my $vmfw_conf = $vmfw_configs->{$vmid};
3482             return if !$vmfw_conf;
3483
3484             # When the 'ipfilter' option is enabled every device for which there
3485             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3486             # ipset.
3487             # The reason is that ipfilter ipsets are always filled with standard
3488             # IPv6 link-local filters, as well as the IP addresses configured
3489             # for the container.
3490             my $ipsets = $vmfw_conf->{ipset};
3491             my $implicit_sets = {};
3492
3493             my $device_ips = {};
3494             foreach my $netid (keys %$conf) {
3495                 next if $netid !~ m/^net(\d+)$/;
3496                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3497                 next if !$net->{firewall};
3498
3499                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3500                     $implicit_sets->{"ipfilter-$netid"} = [];
3501                 }
3502
3503                 my $macaddr = $net->{hwaddr};
3504                 my $linklocal = mac_to_linklocal($macaddr);
3505                 my $set = $device_ips->{$netid} = [
3506                     { cidr => $linklocal },
3507                     { cidr => 'fe80::/10', nomatch => 1 }
3508                 ];
3509                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3510                     push @$set, { cidr => $1 };
3511                 }
3512                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3513                     push @$set, { cidr => $1 };
3514                 }
3515             }
3516
3517             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3518             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3519         };
3520         warn $@ if $@; # just to be sure - should not happen
3521     }
3522
3523     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3524
3525     return $ipset_ruleset;
3526 }
3527
3528 sub get_ruleset_status {
3529     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3530
3531     my $statushash = {};
3532
3533     foreach my $chain (sort keys %$ruleset) {
3534         my $sig = &$digest_fn($ruleset->{$chain});
3535
3536         $statushash->{$chain}->{sig} = $sig;
3537
3538         my $oldsig = $active_chains->{$chain};
3539         if (!defined($oldsig)) {
3540             $statushash->{$chain}->{action} = 'create';
3541         } else {
3542             if ($oldsig eq $sig) {
3543                 $statushash->{$chain}->{action} = 'exists';
3544             } else {
3545                 $statushash->{$chain}->{action} = 'update';
3546             }
3547         }
3548         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3549         foreach my $cmd (@{$ruleset->{$chain}}) {
3550             print "\t$cmd\n" if $verbose;
3551         }
3552     }
3553
3554     foreach my $chain (sort keys %$active_chains) {
3555         if (!defined($ruleset->{$chain})) {
3556             my $sig = $active_chains->{$chain};
3557             $statushash->{$chain}->{action} = 'delete';
3558             $statushash->{$chain}->{sig} = $sig;
3559             print "delete $chain ($sig)\n" if $verbose;
3560         }
3561     }
3562
3563     return $statushash;
3564 }
3565
3566 sub print_sig_rule {
3567     my ($chain, $sig) = @_;
3568
3569     # We just use this to store a SHA1 checksum used to detect changes
3570     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3571 }
3572
3573 sub get_ruleset_cmdlist {
3574     my ($ruleset, $verbose, $iptablescmd) = @_;
3575
3576     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3577
3578     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3579     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3580
3581     # create missing chains first
3582     foreach my $chain (sort keys %$ruleset) {
3583         my $stat = $statushash->{$chain};
3584         die "internal error" if !$stat;
3585         next if $stat->{action} ne 'create';
3586
3587         $cmdlist .= ":$chain - [0:0]\n";
3588     }
3589
3590     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3591         my $chain = "PVEFW-$h";
3592         if ($ruleset->{$chain} && !$hooks->{$h}) {
3593             $cmdlist .= "-A $h -j $chain\n";
3594         }
3595     }
3596
3597     foreach my $chain (sort keys %$ruleset) {
3598         my $stat = $statushash->{$chain};
3599         die "internal error" if !$stat;
3600
3601         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3602             $cmdlist .= "-F $chain\n";
3603             foreach my $cmd (@{$ruleset->{$chain}}) {
3604                 $cmdlist .= "$cmd\n";
3605             }
3606             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3607         } elsif ($stat->{action} eq 'delete') {
3608             die "internal error"; # this should not happen
3609         } elsif ($stat->{action} eq 'exists') {
3610             # do nothing
3611         } else {
3612             die "internal error - unknown status '$stat->{action}'";
3613         }
3614     }
3615
3616     foreach my $chain (keys %$statushash) {
3617         next if $statushash->{$chain}->{action} ne 'delete';
3618         $cmdlist .= "-F $chain\n";
3619     }
3620     foreach my $chain (keys %$statushash) {
3621         next if $statushash->{$chain}->{action} ne 'delete';
3622         next if $chain eq 'PVEFW-INPUT';
3623         next if $chain eq 'PVEFW-OUTPUT';
3624         next if $chain eq 'PVEFW-FORWARD';
3625         $cmdlist .= "-X $chain\n";
3626     }
3627
3628     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3629
3630     $cmdlist .= "COMMIT\n";
3631
3632     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3633 }
3634
3635 sub get_ipset_cmdlist {
3636     my ($ruleset, $verbose) = @_;
3637
3638     my $cmdlist = "";
3639
3640     my $delete_cmdlist = "";
3641
3642     my $active_chains = ipset_get_chains();
3643     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3644
3645     # remove stale _swap chains
3646     foreach my $chain (keys %$active_chains) {
3647         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3648             $cmdlist .= "destroy $chain\n";
3649         }
3650     }
3651
3652     foreach my $chain (keys %$ruleset) {
3653         my $stat = $statushash->{$chain};
3654         die "internal error" if !$stat;
3655
3656         if ($stat->{action} eq 'create') {
3657             foreach my $cmd (@{$ruleset->{$chain}}) {
3658                 $cmdlist .= "$cmd\n";
3659             }
3660         }
3661     }
3662
3663     foreach my $chain (keys %$ruleset) {
3664         my $stat = $statushash->{$chain};
3665         die "internal error" if !$stat;
3666
3667         if ($stat->{action} eq 'update') {
3668             my $chain_swap = $chain."_swap";
3669
3670             foreach my $cmd (@{$ruleset->{$chain}}) {
3671                 $cmd =~ s/$chain/$chain_swap/;
3672                 $cmdlist .= "$cmd\n";
3673             }
3674             $cmdlist .= "swap $chain_swap $chain\n";
3675             $cmdlist .= "flush $chain_swap\n";
3676             $cmdlist .= "destroy $chain_swap\n";
3677         }
3678     }
3679
3680      # the remove unused chains
3681     foreach my $chain (keys %$statushash) {
3682         next if $statushash->{$chain}->{action} ne 'delete';
3683
3684         $delete_cmdlist .= "flush $chain\n";
3685         $delete_cmdlist .= "destroy $chain\n";
3686     }
3687
3688     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3689
3690     return ($cmdlist, $delete_cmdlist, $changes);
3691 }
3692
3693 sub apply_ruleset {
3694     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3695
3696     enable_bridge_firewall();
3697
3698     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3699         get_ipset_cmdlist($ipset_ruleset, $verbose);
3700
3701     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3702     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3703
3704     if ($verbose) {
3705         if ($ipset_changes) {
3706             print "ipset changes:\n";
3707             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3708             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3709         }
3710
3711         if ($changes) {
3712             print "iptables changes:\n";
3713             print $cmdlist;
3714         }
3715
3716         if ($changesv6) {
3717             print "ip6tables changes:\n";
3718             print $cmdlistv6;
3719         }
3720     }
3721
3722     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3723     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3724
3725     ipset_restore_cmdlist($ipset_create_cmdlist);
3726
3727     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3728     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3729
3730     iptables_restore_cmdlist($cmdlist);
3731
3732     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3733     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3734
3735     ip6tables_restore_cmdlist($cmdlistv6);
3736
3737     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3738     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3739
3740     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3741
3742     # test: re-read status and check if everything is up to date
3743     my $active_chains = iptables_get_chains();
3744     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3745
3746     my $errors;
3747     foreach my $chain (sort keys %$ruleset) {
3748         my $stat = $statushash->{$chain};
3749         if ($stat->{action} ne 'exists') {
3750             warn "unable to update chain '$chain'\n";
3751             $errors = 1;
3752         }
3753     }
3754
3755     my $active_chainsv6 = iptables_get_chains("ip6tables");
3756     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3757
3758     foreach my $chain (sort keys %$rulesetv6) {
3759         my $stat = $statushashv6->{$chain};
3760         if ($stat->{action} ne 'exists') {
3761             warn "unable to update chain '$chain'\n";
3762             $errors = 1;
3763         }
3764     }
3765
3766     die "unable to apply firewall changes\n" if $errors;
3767
3768     update_nf_conntrack_max($hostfw_conf);
3769
3770     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3771
3772 }
3773
3774 sub update_nf_conntrack_max {
3775     my ($hostfw_conf) = @_;
3776
3777     my $max = 65536; # reasonable default
3778
3779     my $options = $hostfw_conf->{options} || {};
3780
3781     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3782         $max = $options->{nf_conntrack_max};
3783         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3784     }
3785
3786     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3787     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3788
3789     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3790
3791     if ($current != $max) {
3792         my $hashsize = int($max/4);
3793         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3794         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3795     }
3796 }
3797
3798 sub update_nf_conntrack_tcp_timeout_established {
3799     my ($hostfw_conf) = @_;
3800
3801     my $options = $hostfw_conf->{options} || {};
3802
3803     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3804
3805     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3806 }
3807
3808 sub remove_pvefw_chains {
3809
3810     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3811     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3812     PVE::Firewall::remove_pvefw_chains_ipset();
3813
3814 }
3815
3816 sub remove_pvefw_chains_iptables {
3817     my ($iptablescmd) = @_;
3818
3819     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3820     my $cmdlist = "*filter\n";
3821
3822     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3823         if ($hooks->{$h}) {
3824             $cmdlist .= "-D $h -j PVEFW-$h\n";
3825         }
3826     }
3827
3828     foreach my $chain (keys %$chash) {
3829         $cmdlist .= "-F $chain\n";
3830     }
3831
3832     foreach my $chain (keys %$chash) {
3833         $cmdlist .= "-X $chain\n";
3834     }
3835     $cmdlist .= "COMMIT\n";
3836
3837     if($iptablescmd eq "ip6tables") {
3838         ip6tables_restore_cmdlist($cmdlist);
3839     } else {
3840         iptables_restore_cmdlist($cmdlist);
3841     }
3842 }
3843
3844 sub remove_pvefw_chains_ipset {
3845
3846     my $ipset_chains = ipset_get_chains();
3847
3848     my $cmdlist = "";
3849
3850     foreach my $chain (keys %$ipset_chains) {
3851         $cmdlist .= "flush $chain\n";
3852         $cmdlist .= "destroy $chain\n";
3853     }
3854
3855     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3856 }
3857
3858 sub init {
3859     my $cluster_conf = load_clusterfw_conf();
3860     my $cluster_options = $cluster_conf->{options};
3861     my $enable = $cluster_options->{enable};
3862
3863     return if !$enable;
3864
3865     # load required modules here
3866 }
3867
3868 sub update {
3869     my $code = sub {
3870
3871         my $cluster_conf = load_clusterfw_conf();
3872         my $cluster_options = $cluster_conf->{options};
3873
3874         if (!$cluster_options->{enable}) {
3875             PVE::Firewall::remove_pvefw_chains();
3876             return;
3877         }
3878
3879         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3880
3881         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3882
3883         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3884     };
3885
3886     run_locked($code);
3887 }
3888
3889 1;