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         description => "Rule type.",
1244         type => 'string',
1245         optional => 1,
1246         enum => ['in', 'out', 'group'],
1247     },
1248     action => {
1249         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1250         type => 'string',
1251         optional => 1,
1252         pattern => $security_group_name_pattern,
1253         maxLength => 20,
1254         minLength => 2,
1255     },
1256     macro => {
1257         description => "Use predefined standard macro.",
1258         type => 'string',
1259         optional => 1,
1260         maxLength => 128,
1261     },
1262     iface => get_standard_option('pve-iface', {
1263         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.",
1264         optional => 1
1265     }),
1266     source => {
1267         description => "Restrict packet source address. $addr_list_descr",
1268         type => 'string', format => 'pve-fw-addr-spec',
1269         optional => 1,
1270     },
1271     dest => {
1272         description => "Restrict packet destination address. $addr_list_descr",
1273         type => 'string', format => 'pve-fw-addr-spec',
1274         optional => 1,
1275     },
1276     proto => {
1277         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1278         type => 'string', format => 'pve-fw-protocol-spec',
1279         optional => 1,
1280     },
1281     enable => {
1282         description => "Flag to enable/disable a rule.",
1283         type => 'integer',
1284         minimum => 0,
1285         optional => 1,
1286     },
1287     sport => {
1288         description => "Restrict TCP/UDP source port. $port_descr",
1289         type => 'string', format => 'pve-fw-sport-spec',
1290         optional => 1,
1291     },
1292     dport => {
1293         description => "Restrict TCP/UDP destination port. $port_descr",
1294         type => 'string', format => 'pve-fw-dport-spec',
1295         optional => 1,
1296     },
1297     comment => {
1298         description => "Descriptive comment.",
1299         type => 'string',
1300         optional => 1,
1301     },
1302 };
1303
1304 sub add_rule_properties {
1305     my ($properties) = @_;
1306
1307     foreach my $k (keys %$rule_properties) {
1308         my $h = $rule_properties->{$k};
1309         # copy data, so that we can modify later without side effects
1310         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1311     }
1312
1313     return $properties;
1314 }
1315
1316 sub delete_rule_properties {
1317     my ($rule, $delete_str) = @_;
1318
1319     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1320         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1321             if !defined($rule_properties->{$opt});
1322         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1323             if $opt eq 'type' || $opt eq 'action';
1324         delete $rule->{$opt};
1325     }
1326
1327     return $rule;
1328 }
1329
1330 my $apply_macro = sub {
1331     my ($macro_name, $param, $verify, $ipversion) = @_;
1332
1333     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1334     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1335
1336     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1337         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1338     }
1339
1340     # skip macros which are specific to another ipversion
1341     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1342         return if $ipversion != $required;
1343     }
1344
1345     my $rules = [];
1346
1347     foreach my $templ (@$macro_rules) {
1348         my $rule = {};
1349         my $param_used = {};
1350         foreach my $k (keys %$templ) {
1351             my $v = $templ->{$k};
1352             if ($v eq 'PARAM') {
1353                 $v = $param->{$k};
1354                 $param_used->{$k} = 1;
1355             } elsif ($v eq 'DEST') {
1356                 $v = $param->{dest};
1357                 $param_used->{dest} = 1;
1358             } elsif ($v eq 'SOURCE') {
1359                 $v = $param->{source};
1360                 $param_used->{source} = 1;
1361             }
1362
1363             if (!defined($v)) {
1364                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1365                 raise_param_exc({ macro => $msg }) if $verify;
1366                 die "$msg\n";
1367             }
1368             $rule->{$k} = $v;
1369         }
1370         foreach my $k (keys %$param) {
1371             next if $k eq 'macro';
1372             next if !defined($param->{$k});
1373             next if $param_used->{$k};
1374             if (defined($rule->{$k})) {
1375                 if ($rule->{$k} ne $param->{$k}) {
1376                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1377                     raise_param_exc({ $k => $msg }) if $verify;
1378                     die "$msg\n";
1379                 }
1380             } else {
1381                 $rule->{$k} = $param->{$k};
1382             }
1383         }
1384         push @$rules, $rule;
1385     }
1386
1387     return $rules;
1388 };
1389
1390 my $rule_env_iface_lookup = {
1391     'ct' => 1,
1392     'vm' => 1,
1393     'group' => 0,
1394     'cluster' => 1,
1395     'host' => 1,
1396 };
1397
1398 sub verify_rule {
1399     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1400
1401     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1402
1403     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1404     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1405
1406     my $errors = $rule->{errors} || {};
1407
1408     my $error_count = 0;
1409
1410     my $add_error = sub {
1411         my ($param, $msg)  = @_;
1412         chomp $msg;
1413         raise_param_exc({ $param => $msg }) if !$noerr;
1414         $error_count++;
1415         $errors->{$param} = $msg if !$errors->{$param};
1416     };
1417
1418     my $ipversion;
1419     my $set_ip_version = sub {
1420         my $vers = shift;
1421         if ($vers) {
1422             die "detected mixed ipv4/ipv6 adresses in rule\n"
1423                 if $ipversion && ($vers != $ipversion);
1424             $ipversion = $vers;
1425         }
1426     };
1427
1428     my $check_ipset_or_alias_property = sub {
1429         my ($name, $expected_ipversion) = @_;
1430
1431         if (my $value = $rule->{$name}) {
1432             if ($value =~ m/^\+/) {
1433                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1434                     &$add_error($name, "no such ipset '$1'")
1435                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1436
1437                 } else {
1438                     &$add_error($name, "invalid ipset name '$value'");
1439                 }
1440             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1441                 my $alias = lc($value);
1442                 &$add_error($name, "no such alias '$value'")
1443                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1444                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1445                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1446
1447                 &$set_ip_version($e->{ipversion});
1448             }
1449         }
1450     };
1451
1452     my $type = $rule->{type};
1453     my $action = $rule->{action};
1454
1455     &$add_error('type', "missing property") if !$type;
1456     &$add_error('action', "missing property") if !$action;
1457
1458     if ($type) {
1459         if ($type eq  'in' || $type eq 'out') {
1460             &$add_error('action', "unknown action '$action'")
1461                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1462         } elsif ($type eq 'group') {
1463             &$add_error('type', "security groups not allowed")
1464                 if !$allow_groups;
1465             &$add_error('action', "invalid characters in security group name")
1466                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1467         } else {
1468             &$add_error('type', "unknown rule type '$type'");
1469         }
1470     }
1471
1472     if ($rule->{iface}) {
1473         &$add_error('type', "parameter -i not allowed for this rule type")
1474             if !$allow_iface;
1475         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1476         &$add_error('iface', $@) if $@;
1477         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1478             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1479                 if $rule->{iface} !~  m/^net(\d+)$/;
1480         }
1481     }
1482
1483     if ($rule->{macro}) {
1484         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1485             $rule->{macro} = $preferred_name;
1486         } else {
1487             &$add_error('macro', "unknown macro '$rule->{macro}'");
1488         }
1489     }
1490
1491     if ($rule->{proto}) {
1492         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1493         &$add_error('proto', $@) if $@;
1494         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1495         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1496     }
1497
1498     if ($rule->{dport}) {
1499         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1500         &$add_error('dport', $@) if $@;
1501         &$add_error('proto', "missing property - 'dport' requires this property")
1502             if !$rule->{proto};
1503     }
1504
1505     if ($rule->{sport}) {
1506         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1507         &$add_error('sport', $@) if $@;
1508         &$add_error('proto', "missing property - 'sport' requires this property")
1509             if !$rule->{proto};
1510     }
1511
1512     if ($rule->{source}) {
1513         eval {
1514             my $source_ipversion = parse_address_list($rule->{source});
1515             &$set_ip_version($source_ipversion);
1516         };
1517         &$add_error('source', $@) if $@;
1518         &$check_ipset_or_alias_property('source', $ipversion);
1519     }
1520
1521     if ($rule->{dest}) {
1522         eval {
1523             my $dest_ipversion = parse_address_list($rule->{dest});
1524             &$set_ip_version($dest_ipversion);
1525         };
1526         &$add_error('dest', $@) if $@;
1527         &$check_ipset_or_alias_property('dest', $ipversion);
1528     }
1529
1530     $rule->{ipversion} = $ipversion if $ipversion;
1531
1532     if ($rule->{macro} && !$error_count) {
1533         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1534         if (my $err = $@) {
1535             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1536                 my $eh = $err->{errors};
1537                 foreach my $p (keys %$eh) {
1538                     &$add_error($p, $eh->{$p});
1539                 }
1540             } else {
1541                 &$add_error('macro', "$err");
1542             }
1543         }
1544     }
1545
1546     $rule->{errors} = $errors if $error_count;
1547
1548     return $rule;
1549 }
1550
1551 sub copy_rule_data {
1552     my ($rule, $param) = @_;
1553
1554     foreach my $k (keys %$rule_properties) {
1555         if (defined(my $v = $param->{$k})) {
1556             if ($v eq '' || $v eq '-') {
1557                 delete $rule->{$k};
1558             } else {
1559                 $rule->{$k} = $v;
1560             }
1561         }
1562     }
1563
1564     return $rule;
1565 }
1566
1567 sub rules_modify_permissions {
1568     my ($rule_env) = @_;
1569
1570     if ($rule_env eq 'host') {
1571         return {
1572             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1573         };
1574     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1575         return {
1576             check => ['perm', '/', [ 'Sys.Modify' ]],
1577         };
1578     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1579         return {
1580             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1581         }
1582     }
1583
1584     return undef;
1585 }
1586
1587 sub rules_audit_permissions {
1588     my ($rule_env) = @_;
1589
1590     if ($rule_env eq 'host') {
1591         return {
1592             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1593         };
1594     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1595         return {
1596             check => ['perm', '/', [ 'Sys.Audit' ]],
1597         };
1598     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1599         return {
1600             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1601         }
1602     }
1603
1604     return undef;
1605 }
1606
1607 # core functions
1608 my $bridge_firewall_enabled = 0;
1609
1610 sub enable_bridge_firewall {
1611
1612     return if $bridge_firewall_enabled; # only once
1613
1614     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1615     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1616
1617     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1618     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1619
1620     $bridge_firewall_enabled = 1;
1621 }
1622
1623 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1624
1625 sub iptables_restore_cmdlist {
1626     my ($cmdlist) = @_;
1627
1628     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1629 }
1630
1631 sub ip6tables_restore_cmdlist {
1632     my ($cmdlist) = @_;
1633
1634     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1635 }
1636
1637 sub ipset_restore_cmdlist {
1638     my ($cmdlist) = @_;
1639
1640     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1641 }
1642
1643 sub iptables_get_chains {
1644     my ($iptablescmd) = @_;
1645
1646     $iptablescmd = "iptables" if !$iptablescmd;
1647
1648     my $res = {};
1649
1650     # check what chains we want to track
1651     my $is_pvefw_chain = sub {
1652         my $name = shift;
1653
1654         return 1 if $name =~ m/^PVEFW-\S+$/;
1655
1656         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1657
1658         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1659
1660         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1661         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1662
1663         return undef;
1664     };
1665
1666     my $table = '';
1667
1668     my $hooks = {};
1669
1670     my $parser = sub {
1671         my $line = shift;
1672
1673         return if $line =~ m/^#/;
1674         return if $line =~ m/^\s*$/;
1675
1676         if ($line =~ m/^\*(\S+)$/) {
1677             $table = $1;
1678             return;
1679         }
1680
1681         return if $table ne 'filter';
1682
1683         if ($line =~ m/^:(\S+)\s/) {
1684             my $chain = $1;
1685             return if !&$is_pvefw_chain($chain);
1686             $res->{$chain} = "unknown";
1687         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1688             my ($chain, $sig) = ($1, $2);
1689             return if !&$is_pvefw_chain($chain);
1690             $res->{$chain} = $sig;
1691         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1692             $hooks->{$1} = 1;
1693         } else {
1694             # simply ignore the rest
1695             return;
1696         }
1697     };
1698
1699     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1700
1701     return wantarray ? ($res, $hooks) : $res;
1702 }
1703
1704 sub iptables_chain_digest {
1705     my ($rules) = @_;
1706     my $digest = Digest::SHA->new('sha1');
1707     foreach my $rule (@$rules) { # order is important
1708         $digest->add($rule);
1709     }
1710     return $digest->b64digest;
1711 }
1712
1713 sub ipset_chain_digest {
1714     my ($rules) = @_;
1715
1716     my $digest = Digest::SHA->new('sha1');
1717     foreach my $rule (sort @$rules) { # note: sorted
1718         $digest->add($rule);
1719     }
1720     return $digest->b64digest;
1721 }
1722
1723 sub ipset_get_chains {
1724
1725     my $res = {};
1726     my $chains = {};
1727
1728     my $parser = sub {
1729         my $line = shift;
1730
1731         return if $line =~ m/^#/;
1732         return if $line =~ m/^\s*$/;
1733         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1734             my $chain = $1;
1735             $line =~ s/\s+$//; # delete trailing white space
1736             push @{$chains->{$chain}}, $line;
1737         } else {
1738             # simply ignore the rest
1739             return;
1740         }
1741     };
1742
1743     run_command("/sbin/ipset save", outfunc => $parser);
1744
1745     # compute digest for each chain
1746     foreach my $chain (keys %$chains) {
1747         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1748     }
1749
1750     return $res;
1751 }
1752
1753 sub ruleset_generate_cmdstr {
1754     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1755
1756     return if defined($rule->{enable}) && !$rule->{enable};
1757     return if $rule->{errors};
1758
1759     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1760
1761     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1762     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1763
1764     my @cmd = ();
1765
1766     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1767     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1768
1769     my $source = $rule->{source};
1770     my $dest = $rule->{dest};
1771
1772     if ($source) {
1773         if ($source =~ m/^\+/) {
1774             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1775                 my $name = $1;
1776                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1777                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1778                     push @cmd, "-m set --match-set ${ipset_chain} src";
1779                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1780                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1781                     push @cmd, "-m set --match-set ${ipset_chain} src";
1782                 } else {
1783                     die "no such ipset '$name'\n";
1784                 }
1785             } else {
1786                 die "invalid security group name '$source'\n";
1787             }
1788         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1789             my $alias = lc($source);
1790             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1791             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1792             die "no such alias '$source'\n" if !$e;
1793             push @cmd, "-s $e->{cidr}";
1794         } elsif ($source =~ m/\-/){
1795             push @cmd, "-m iprange --src-range $source";
1796         } else {
1797             push @cmd, "-s $source";
1798         }
1799     }
1800
1801     if ($dest) {
1802         if ($dest =~ m/^\+/) {
1803             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1804                 my $name = $1;
1805                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1806                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1807                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1808                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1809                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1810                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1811                 } else {
1812                     die "no such ipset '$name'\n";
1813                 }
1814             } else {
1815                 die "invalid security group name '$dest'\n";
1816             }
1817         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1818             my $alias = lc($dest);
1819             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1820             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1821             die "no such alias '$dest'\n" if !$e;
1822             push @cmd, "-d $e->{cidr}";
1823         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1824             push @cmd, "-m iprange --dst-range $dest";
1825         } else {
1826             push @cmd, "-d $dest";
1827         }
1828     }
1829
1830     if ($rule->{proto}) {
1831         push @cmd, "-p $rule->{proto}";
1832
1833         my $multiport = 0;
1834         $multiport++ if $nbdport > 1;
1835         $multiport++ if $nbsport > 1;
1836
1837         push @cmd, "--match multiport" if $multiport;
1838
1839         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1840             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1841
1842         if ($rule->{dport}) {
1843             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1844                 # Note: we use dport to store --icmp-type
1845                 die "unknown icmp-type '$rule->{dport}'\n"
1846                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1847                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1848             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1849                 # Note: we use dport to store --icmpv6-type
1850                 die "unknown icmpv6-type '$rule->{dport}'\n"
1851                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1852                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1853             } else {
1854                 if ($nbdport > 1) {
1855                     if ($multiport == 2) {
1856                         push @cmd,  "--ports $rule->{dport}";
1857                     } else {
1858                         push @cmd, "--dports $rule->{dport}";
1859                     }
1860                 } else {
1861                     push @cmd, "--dport $rule->{dport}";
1862                 }
1863             }
1864         }
1865
1866         if ($rule->{sport}) {
1867             if ($nbsport > 1) {
1868                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1869             } else {
1870                 push @cmd, "--sport $rule->{sport}";
1871             }
1872         }
1873     } elsif ($rule->{dport} || $rule->{sport}) {
1874         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1875         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1876     }
1877
1878     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1879
1880     if (my $action = $rule->{action}) {
1881         $action = $actions->{$action} if defined($actions->{$action});
1882         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1883         push @cmd, $goto ? "-g $action" : "-j $action";
1884     }
1885
1886     return scalar(@cmd) ? join(' ', @cmd) : undef;
1887 }
1888
1889 sub ruleset_generate_rule {
1890     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1891
1892     my $rules;
1893
1894     if ($rule->{macro}) {
1895         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1896     } else {
1897         $rules = [ $rule ];
1898     }
1899
1900     # update all or nothing
1901
1902     my @cmds = ();
1903     foreach my $tmp (@$rules) {
1904         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1905             push @cmds, $cmdstr;
1906         }
1907     }
1908
1909     foreach my $cmdstr (@cmds) {
1910         ruleset_addrule($ruleset, $chain, $cmdstr);
1911     }
1912 }
1913
1914 sub ruleset_generate_rule_insert {
1915     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1916
1917     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1918
1919     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1920         ruleset_insertrule($ruleset, $chain, $cmdstr);
1921     }
1922 }
1923
1924 sub ruleset_create_chain {
1925     my ($ruleset, $chain) = @_;
1926
1927     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1928     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1929
1930     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1931
1932     $ruleset->{$chain} = [];
1933 }
1934
1935 sub ruleset_chain_exist {
1936     my ($ruleset, $chain) = @_;
1937
1938     return $ruleset->{$chain} ? 1 : undef;
1939 }
1940
1941 sub ruleset_addrule {
1942    my ($ruleset, $chain, $rule) = @_;
1943
1944    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1945
1946    push @{$ruleset->{$chain}}, "-A $chain $rule";
1947 }
1948
1949 sub ruleset_insertrule {
1950    my ($ruleset, $chain, $rule) = @_;
1951
1952    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1953
1954    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1955 }
1956
1957 sub get_log_rule_base {
1958     my ($chain, $vmid, $msg, $loglevel) = @_;
1959
1960     die "internal error - no log level" if !defined($loglevel);
1961
1962     $vmid = 0 if !defined($vmid);
1963
1964     # Note: we use special format for prefix to pass further
1965     # info to log daemon (VMID, LOGVELEL and CHAIN)
1966
1967     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1968 }
1969
1970 sub ruleset_addlog {
1971     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1972
1973     return if !defined($loglevel);
1974
1975     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1976
1977     $logrule = "$rule $logrule" if defined($rule);
1978
1979     ruleset_addrule($ruleset, $chain, $logrule);
1980 }
1981
1982 sub ruleset_add_chain_policy {
1983     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1984
1985     if ($policy eq 'ACCEPT') {
1986
1987         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1988                               { ACCEPT =>  $accept_action});
1989
1990     } elsif ($policy eq 'DROP') {
1991
1992         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1993
1994         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1995
1996         ruleset_addrule($ruleset, $chain, "-j DROP");
1997     } elsif ($policy eq 'REJECT') {
1998         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1999
2000         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2001
2002         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2003     } else {
2004         # should not happen
2005         die "internal error: unknown policy '$policy'";
2006     }
2007 }
2008
2009 sub ruleset_chain_add_ndp {
2010     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2011     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2012
2013     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2014     if ($direction ne 'OUT' || $options->{radv}) {
2015         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2016     }
2017     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2018     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2019 }
2020
2021 sub ruleset_chain_add_conn_filters {
2022     my ($ruleset, $chain, $accept) = @_;
2023
2024     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2025     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2026 }
2027
2028 sub ruleset_chain_add_input_filters {
2029     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2030
2031     if ($cluster_conf->{ipset}->{blacklist}){
2032         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2033             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2034             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2035             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2036         }
2037         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2038         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2039     }
2040
2041     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2042         if ($ipversion == 4) {
2043             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2044         }
2045     }
2046
2047     if ($options->{tcpflags}) {
2048         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2049     }
2050 }
2051
2052 sub ruleset_create_vm_chain {
2053     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2054
2055     ruleset_create_chain($ruleset, $chain);
2056     my $accept = generate_nfqueue($options);
2057
2058     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2059         if ($ipversion == 4) {
2060             if ($direction eq 'OUT') {
2061                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2062                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2063                                         proto => 'udp', sport => 68, dport => 67 });
2064             } else {
2065                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2066                                       { action => 'ACCEPT',
2067                                         proto => 'udp', sport => 67, dport => 68 });
2068             }
2069         } elsif ($ipversion == 6) {
2070             if ($direction eq 'OUT') {
2071                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2072                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2073                                         proto => 'udp', sport => 546, dport => 547 });
2074             } else {
2075                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2076                                       { action => 'ACCEPT',
2077                                         proto => 'udp', sport => 547, dport => 546 });
2078             }
2079         }
2080
2081     }
2082
2083     if ($direction eq 'OUT') {
2084         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2085             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2086         }
2087         if ($ipversion == 6 && !$options->{radv}) {
2088             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2089         }
2090         if ($ipfilter_ipset) {
2091             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2092         }
2093         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2094     }
2095
2096     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2097     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2098 }
2099
2100 sub ruleset_add_group_rule {
2101     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2102
2103     my $group = $rule->{action};
2104     my $group_chain = "GROUP-$group-$direction";
2105     if(!ruleset_chain_exist($ruleset, $group_chain)){
2106         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2107     }
2108
2109     if ($direction eq 'OUT' && $rule->{iface_out}) {
2110         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2111     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2112         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2113     } else {
2114         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2115     }
2116
2117     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2118 }
2119
2120 sub ruleset_generate_vm_rules {
2121     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2122
2123     my $lc_direction = lc($direction);
2124
2125     my $in_accept = generate_nfqueue($options);
2126
2127     foreach my $rule (@$rules) {
2128         next if $rule->{iface} && $rule->{iface} ne $netid;
2129         next if !$rule->{enable} || $rule->{errors};
2130         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2131
2132         if ($rule->{type} eq 'group') {
2133             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2134                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2135         } else {
2136             next if $rule->{type} ne $lc_direction;
2137             eval {
2138                 if ($direction eq 'OUT') {
2139                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2140                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2141                                           undef, $cluster_conf, $vmfw_conf);
2142                 } else {
2143                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2144                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2145                                           undef, $cluster_conf, $vmfw_conf);
2146                 }
2147             };
2148             warn $@ if $@;
2149         }
2150     }
2151 }
2152
2153 sub generate_nfqueue {
2154     my ($options) = @_;
2155
2156     if ($options->{ips}) {
2157         my $action = "NFQUEUE";
2158         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2159             if (defined($3) && defined($1)) {
2160                 $action .= " --queue-balance $1:$3";
2161             } elsif (defined($1)) {
2162                 $action .= " --queue-num $1";
2163             }
2164         }
2165         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2166         return $action;
2167     } else {
2168         return "ACCEPT";
2169     }
2170 }
2171
2172 sub ruleset_generate_vm_ipsrules {
2173     my ($ruleset, $options, $direction, $iface) = @_;
2174
2175     if ($options->{ips} && $direction eq 'IN') {
2176         my $nfqueue = generate_nfqueue($options);
2177
2178         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2179             ruleset_create_chain($ruleset, "PVEFW-IPS");
2180         }
2181
2182         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2183     }
2184 }
2185
2186 sub generate_tap_rules_direction {
2187     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2188
2189     my $lc_direction = lc($direction);
2190
2191     my $rules = $vmfw_conf->{rules};
2192
2193     my $options = $vmfw_conf->{options};
2194     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2195
2196     my $tapchain = "$iface-$direction";
2197
2198     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2199     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2200         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2201
2202     # create chain with mac and ip filter
2203     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2204
2205     if ($options->{enable}) {
2206         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2207
2208         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2209
2210         # implement policy
2211         my $policy;
2212
2213         if ($direction eq 'OUT') {
2214             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2215         } else {
2216         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2217         }
2218
2219         my $accept = generate_nfqueue($options);
2220         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2221         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2222     } else {
2223         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2224         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2225     }
2226
2227     # plug the tap chain to bridge chain
2228     if ($direction eq 'IN') {
2229         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2230                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2231     } else {
2232         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2233                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2234     }
2235 }
2236
2237 sub enable_host_firewall {
2238     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2239
2240     my $options = $hostfw_conf->{options};
2241     my $cluster_options = $cluster_conf->{options};
2242     my $rules = $hostfw_conf->{rules};
2243     my $cluster_rules = $cluster_conf->{rules};
2244
2245     # host inbound firewall
2246     my $chain = "PVEFW-HOST-IN";
2247     ruleset_create_chain($ruleset, $chain);
2248
2249     my $loglevel = get_option_log_level($options, "log_level_in");
2250
2251     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2252
2253     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2254     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2255     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2256
2257     # we use RETURN because we need to check also tap rules
2258     my $accept_action = 'RETURN';
2259
2260     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2261
2262     # add host rules first, so that cluster wide rules can be overwritten
2263     foreach my $rule (@$rules, @$cluster_rules) {
2264         next if !$rule->{enable} || $rule->{errors};
2265         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2266
2267         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2268
2269         eval {
2270             if ($rule->{type} eq 'group') {
2271                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2272             } elsif ($rule->{type} eq 'in') {
2273                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2274                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2275                                       undef, $cluster_conf, $hostfw_conf);
2276             }
2277         };
2278         warn $@ if $@;
2279         delete $rule->{iface_in};
2280     }
2281
2282     # allow standard traffic for management ipset (includes cluster network)
2283     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2284     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2285     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2286     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2287     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2288     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2289
2290     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2291     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2292
2293     # corosync
2294     if ($localnet && ($ipversion == $localnet_ver)) {
2295         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2296         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2297         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2298     }
2299
2300     # implement input policy
2301     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2302     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2303
2304     # host outbound firewall
2305     $chain = "PVEFW-HOST-OUT";
2306     ruleset_create_chain($ruleset, $chain);
2307
2308     $loglevel = get_option_log_level($options, "log_level_out");
2309
2310     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2311
2312     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2313
2314     # we use RETURN because we may want to check other thigs later
2315     $accept_action = 'RETURN';
2316     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2317
2318     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2319
2320     # add host rules first, so that cluster wide rules can be overwritten
2321     foreach my $rule (@$rules, @$cluster_rules) {
2322         next if !$rule->{enable} || $rule->{errors};
2323         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2324
2325         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2326         eval {
2327             if ($rule->{type} eq 'group') {
2328                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2329             } elsif ($rule->{type} eq 'out') {
2330                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2331                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2332                                       undef, $cluster_conf, $hostfw_conf);
2333             }
2334         };
2335         warn $@ if $@;
2336         delete $rule->{iface_out};
2337     }
2338
2339     # allow standard traffic on cluster network
2340     if ($localnet && ($ipversion == $localnet_ver)) {
2341         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2342         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2343         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2344         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2345
2346         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2347         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2348         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2349     }
2350
2351     # implement output policy
2352     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2353     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2354
2355     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2356     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2357 }
2358
2359 sub generate_group_rules {
2360     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2361
2362     my $rules = $cluster_conf->{groups}->{$group};
2363
2364     if (!$rules) {
2365         warn "no such security group '$group'\n";
2366         $rules = []; # create empty chain
2367     }
2368
2369     my $chain = "GROUP-${group}-IN";
2370
2371     ruleset_create_chain($ruleset, $chain);
2372     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2373
2374     foreach my $rule (@$rules) {
2375         next if $rule->{type} ne 'in';
2376         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2377         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2378                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2379                               undef, $cluster_conf);
2380     }
2381
2382     $chain = "GROUP-${group}-OUT";
2383
2384     ruleset_create_chain($ruleset, $chain);
2385     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2386
2387     foreach my $rule (@$rules) {
2388         next if $rule->{type} ne 'out';
2389         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2390         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2391         # check also other tap rules later
2392         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2393                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2394                               undef, $cluster_conf);
2395     }
2396 }
2397
2398 my $MAX_NETS = 32;
2399 my $valid_netdev_names = {};
2400 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2401     $valid_netdev_names->{"net$i"} = 1;
2402 }
2403
2404 sub get_mark_values {
2405     my ($value, $mask) = @_;
2406     $value = hex($value) if $value =~ /^0x/;
2407     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2408     $mask = 0xffffffff if !defined($mask);
2409     return ($value, $mask);
2410 }
2411
2412 sub parse_fw_rule {
2413     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2414
2415     my $orig_line = $line;
2416
2417     my $rule = {};
2418
2419     # we can add single line comments to the end of the rule
2420     if ($line =~ s/#\s*(.*?)\s*$//) {
2421         $rule->{comment} = decode('utf8', $1);
2422     }
2423
2424     # we can disable a rule when prefixed with '|'
2425
2426     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2427
2428     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2429         die "unable to parse rule: $line\n";
2430
2431     $rule->{type} = lc($1);
2432     $rule->{action} = $2;
2433
2434     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2435         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2436             $rule->{macro} = $1;
2437             $rule->{action} = $2;
2438         }
2439     }
2440
2441     while (length($line)) {
2442         if ($line =~ s/^-i (\S+)\s*//) {
2443             $rule->{iface} = $1;
2444             next;
2445         }
2446
2447         last if $rule->{type} eq 'group';
2448
2449         if ($line =~ s/^-p (\S+)\s*//) {
2450             $rule->{proto} = $1;
2451             next;
2452         }
2453
2454         if ($line =~ s/^-dport (\S+)\s*//) {
2455             $rule->{dport} = $1;
2456             next;
2457         }
2458
2459         if ($line =~ s/^-sport (\S+)\s*//) {
2460             $rule->{sport} = $1;
2461             next;
2462         }
2463         if ($line =~ s/^-source (\S+)\s*//) {
2464             $rule->{source} = $1;
2465             next;
2466         }
2467         if ($line =~ s/^-dest (\S+)\s*//) {
2468             $rule->{dest} = $1;
2469             next;
2470         }
2471
2472         last;
2473     }
2474
2475     die "unable to parse rule parameters: $line\n" if length($line);
2476
2477     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2478     if ($verbose && $rule->{errors}) {
2479         warn "$prefix - errors in rule parameters: $orig_line\n";
2480         foreach my $p (keys %{$rule->{errors}}) {
2481             warn "  $p: $rule->{errors}->{$p}\n";
2482         }
2483     }
2484
2485     return $rule;
2486 }
2487
2488 sub parse_vmfw_option {
2489     my ($line) = @_;
2490
2491     my ($opt, $value);
2492
2493     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2494
2495     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2496         $opt = lc($1);
2497         $value = int($2);
2498     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2499         $opt = lc($1);
2500         $value = $2 ? lc($3) : '';
2501     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2502         $opt = lc($1);
2503         $value = uc($3);
2504     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2505         $opt = lc($1);
2506         $value = $2;
2507     } else {
2508         die "can't parse option '$line'\n"
2509     }
2510
2511     return ($opt, $value);
2512 }
2513
2514 sub parse_hostfw_option {
2515     my ($line) = @_;
2516
2517     my ($opt, $value);
2518
2519     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2520
2521     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2522         $opt = lc($1);
2523         $value = int($2);
2524     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2525         $opt = lc($1);
2526         $value = $2 ? lc($3) : '';
2527     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2528         $opt = lc($1);
2529         $value = int($2);
2530     } else {
2531         die "can't parse option '$line'\n"
2532     }
2533
2534     return ($opt, $value);
2535 }
2536
2537 sub parse_clusterfw_option {
2538     my ($line) = @_;
2539
2540     my ($opt, $value);
2541
2542     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2543         $opt = lc($1);
2544         $value = int($2);
2545         if (($value > 1) && ((time() - $value) > 60)) {
2546             $value = 0
2547         }
2548     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2549         $opt = lc($1);
2550         $value = uc($3);
2551     } else {
2552         die "can't parse option '$line'\n"
2553     }
2554
2555     return ($opt, $value);
2556 }
2557
2558 sub resolve_alias {
2559     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2560
2561     my $alias = lc($cidr);
2562     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2563     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2564
2565     die "no such alias '$cidr'\n" if !$e;;
2566
2567     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2568 }
2569
2570 sub parse_ip_or_cidr {
2571     my ($cidr) = @_;
2572
2573     my $ipversion;
2574
2575     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2576         $cidr =~ s|/128$||;
2577         $ipversion = 6;
2578     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2579         $cidr =~ s|/32$||;
2580         $ipversion = 4;
2581     } else {
2582         die "value does not look like a valid IP address or CIDR network\n";
2583     }
2584
2585     return wantarray ? ($cidr, $ipversion) : $cidr;
2586 }
2587
2588 sub parse_alias {
2589     my ($line) = @_;
2590
2591     # we can add single line comments to the end of the line
2592     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2593
2594     if ($line =~ m/^(\S+)\s(\S+)$/) {
2595         my ($name, $cidr) = ($1, $2);
2596         my $ipversion;
2597
2598         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2599
2600         my $data = {
2601             name => $name,
2602             cidr => $cidr,
2603             ipversion => $ipversion,
2604         };
2605         $data->{comment} = $comment  if $comment;
2606         return $data;
2607     }
2608
2609     return undef;
2610 }
2611
2612 sub generic_fw_config_parser {
2613     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2614
2615     my $section;
2616     my $group;
2617
2618     my $res = $empty_conf;
2619
2620     while (defined(my $line = <$fh>)) {
2621         next if $line =~ m/^#/;
2622         next if $line =~ m/^\s*$/;
2623
2624         chomp $line;
2625
2626         my $linenr = $fh->input_line_number();
2627         my $prefix = "$filename (line $linenr)";
2628
2629         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2630             $section = 'options';
2631             next;
2632         }
2633
2634         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2635             $section = 'aliases';
2636             next;
2637         }
2638
2639         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2640             $section = 'groups';
2641             $group = lc($1);
2642             my $comment = $2;
2643             eval {
2644                 die "security group name too long\n" if length($group) > $max_group_name_length;
2645                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2646             };
2647             if (my $err = $@) {
2648                 ($section, $group, $comment) = undef;
2649                 warn "$prefix: $err";
2650                 next;
2651             }
2652
2653             $res->{$section}->{$group} = [];
2654             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2655                 if $comment;
2656             next;
2657         }
2658
2659         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2660             $section = 'rules';
2661             next;
2662         }
2663
2664         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2665             $section = 'ipset';
2666             $group = lc($1);
2667             my $comment = $2;
2668             eval {
2669                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2670                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2671             };
2672             if (my $err = $@) {
2673                 ($section, $group, $comment) = undef;
2674                 warn "$prefix: $err";
2675                 next;
2676             }
2677
2678             $res->{$section}->{$group} = [];
2679             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2680                 if $comment;
2681             next;
2682         }
2683
2684         if (!$section) {
2685             warn "$prefix: skip line - no section\n";
2686             next;
2687         }
2688
2689         if ($section eq 'options') {
2690             eval {
2691                 my ($opt, $value);
2692                 if ($rule_env eq 'cluster') {
2693                     ($opt, $value) = parse_clusterfw_option($line);
2694                 } elsif ($rule_env eq 'host') {
2695                     ($opt, $value) = parse_hostfw_option($line);
2696                 } else {
2697                     ($opt, $value) = parse_vmfw_option($line);
2698                 }
2699                 $res->{options}->{$opt} = $value;
2700             };
2701             warn "$prefix: $@" if $@;
2702         } elsif ($section eq 'aliases') {
2703             eval {
2704                 my $data = parse_alias($line);
2705                 $res->{aliases}->{lc($data->{name})} = $data;
2706             };
2707             warn "$prefix: $@" if $@;
2708         } elsif ($section eq 'rules') {
2709             my $rule;
2710             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2711             if (my $err = $@) {
2712                 warn "$prefix: $err";
2713                 next;
2714             }
2715             push @{$res->{$section}}, $rule;
2716         } elsif ($section eq 'groups') {
2717             my $rule;
2718             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2719             if (my $err = $@) {
2720                 warn "$prefix: $err";
2721                 next;
2722             }
2723             push @{$res->{$section}->{$group}}, $rule;
2724         } elsif ($section eq 'ipset') {
2725             # we can add single line comments to the end of the rule
2726             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2727
2728             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2729             my $nomatch = $1;
2730             my $cidr = $2;
2731             my $errors;
2732
2733             if ($nomatch && !$feature_ipset_nomatch) {
2734                 $errors->{nomatch} = "nomatch not supported by kernel";
2735             }
2736
2737             eval {
2738                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2739                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2740                 } else {
2741                     $cidr = parse_ip_or_cidr($cidr);
2742                 }
2743             };
2744             if (my $err = $@) {
2745                 chomp $err;
2746                 $errors->{cidr} = $err;
2747             }
2748
2749             my $entry = { cidr => $cidr };
2750             $entry->{nomatch} = 1 if $nomatch;
2751             $entry->{comment} = $comment if $comment;
2752             $entry->{errors} =  $errors if $errors;
2753
2754             if ($verbose && $errors) {
2755                 warn "$prefix - errors in ipset '$group': $line\n";
2756                 foreach my $p (keys %{$errors}) {
2757                     warn "  $p: $errors->{$p}\n";
2758                 }
2759             }
2760
2761             push @{$res->{$section}->{$group}}, $entry;
2762         } else {
2763             warn "$prefix: skip line - unknown section\n";
2764             next;
2765         }
2766     }
2767
2768     return $res;
2769 }
2770
2771 sub parse_hostfw_config {
2772     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2773
2774     my $empty_conf = { rules => [], options => {}};
2775
2776     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2777 }
2778
2779 sub parse_vmfw_config {
2780     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2781
2782     my $empty_conf = {
2783         rules => [],
2784         options => {},
2785         aliases => {},
2786         ipset => {} ,
2787         ipset_comments => {},
2788     };
2789
2790     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2791 }
2792
2793 sub parse_clusterfw_config {
2794     my ($filename, $fh, $verbose) = @_;
2795
2796     my $section;
2797     my $group;
2798
2799     my $empty_conf = {
2800         rules => [],
2801         options => {},
2802         aliases => {},
2803         groups => {},
2804         group_comments => {},
2805         ipset => {} ,
2806         ipset_comments => {},
2807     };
2808
2809     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2810 }
2811
2812 sub run_locked {
2813     my ($code, @param) = @_;
2814
2815     my $timeout = 10;
2816
2817     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2818
2819     die $@ if $@;
2820
2821     return $res;
2822 }
2823
2824 sub read_local_vm_config {
2825
2826     my $qemu = {};
2827     my $lxc = {};
2828
2829     my $vmdata = { qemu => $qemu, lxc => $lxc };
2830
2831     my $vmlist = PVE::Cluster::get_vmlist();
2832     return $vmdata if !$vmlist || !$vmlist->{ids};
2833     my $ids = $vmlist->{ids};
2834
2835     foreach my $vmid (keys %$ids) {
2836         next if !$vmid; # skip VE0
2837         my $d = $ids->{$vmid};
2838         next if !$d->{node} || $d->{node} ne $nodename;
2839         next if !$d->{type};
2840         if ($d->{type} eq 'qemu') {
2841             if ($have_qemu_server) {
2842                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2843                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2844                     $qemu->{$vmid} = $conf;
2845                 }
2846             }
2847         } elsif ($d->{type} eq 'lxc') {
2848             if ($have_lxc) {
2849                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2850                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2851                     $lxc->{$vmid} = $conf;
2852                 }
2853             }
2854         }
2855     }
2856
2857     return $vmdata;
2858 };
2859
2860 sub load_vmfw_conf {
2861     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2862
2863     my $vmfw_conf = {};
2864
2865     $dir = $pvefw_conf_dir if !defined($dir);
2866
2867     my $filename = "$dir/$vmid.fw";
2868     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2869         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2870         $vmfw_conf->{vmid} = $vmid;
2871     }
2872
2873     return $vmfw_conf;
2874 }
2875
2876 my $format_rules = sub {
2877     my ($rules, $allow_iface) = @_;
2878
2879     my $raw = '';
2880
2881     foreach my $rule (@$rules) {
2882         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2883             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2884             $raw .= uc($rule->{type});
2885             if ($rule->{macro}) {
2886                 $raw .= " $rule->{macro}($rule->{action})";
2887             } else {
2888                 $raw .= " " . $rule->{action};
2889             }
2890             if ($allow_iface && $rule->{iface}) {
2891                 $raw .= " -i $rule->{iface}";
2892             }
2893
2894             if ($rule->{type} ne  'group')  {
2895                 $raw .= " -source $rule->{source}" if $rule->{source};
2896                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2897                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2898                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2899                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2900             }
2901
2902             $raw .= " # " . encode('utf8', $rule->{comment})
2903                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2904             $raw .= "\n";
2905         } else {
2906             die "unknown rule type '$rule->{type}'";
2907         }
2908     }
2909
2910     return $raw;
2911 };
2912
2913 my $format_options = sub {
2914     my ($options) = @_;
2915
2916     my $raw = '';
2917
2918     $raw .= "[OPTIONS]\n\n";
2919     foreach my $opt (keys %$options) {
2920         $raw .= "$opt: $options->{$opt}\n";
2921     }
2922     $raw .= "\n";
2923
2924     return $raw;
2925 };
2926
2927 my $format_aliases = sub {
2928     my ($aliases) = @_;
2929
2930     my $raw = '';
2931
2932     $raw .= "[ALIASES]\n\n";
2933     foreach my $k (keys %$aliases) {
2934         my $e = $aliases->{$k};
2935         $raw .= "$e->{name} $e->{cidr}";
2936         $raw .= " # " . encode('utf8', $e->{comment})
2937             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2938         $raw .= "\n";
2939     }
2940     $raw .= "\n";
2941
2942     return $raw;
2943 };
2944
2945 my $format_ipsets = sub {
2946     my ($fw_conf) = @_;
2947
2948     my $raw = '';
2949
2950     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2951         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2952             my $utf8comment = encode('utf8', $comment);
2953             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2954         } else {
2955             $raw .= "[IPSET $ipset]\n\n";
2956         }
2957         my $options = $fw_conf->{ipset}->{$ipset};
2958
2959         my $nethash = {};
2960         foreach my $entry (@$options) {
2961             $nethash->{$entry->{cidr}} = $entry;
2962         }
2963
2964         foreach my $cidr (sort keys %$nethash) {
2965             my $entry = $nethash->{$cidr};
2966             my $line = $entry->{nomatch} ? '!' : '';
2967             $line .= $entry->{cidr};
2968             $line .= " # " . encode('utf8', $entry->{comment})
2969                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2970             $raw .= "$line\n";
2971         }
2972
2973         $raw .= "\n";
2974     }
2975
2976     return $raw;
2977 };
2978
2979 sub save_vmfw_conf {
2980     my ($vmid, $vmfw_conf) = @_;
2981
2982     my $raw = '';
2983
2984     my $options = $vmfw_conf->{options};
2985     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2986
2987     my $aliases = $vmfw_conf->{aliases};
2988     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2989
2990     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2991
2992     my $rules = $vmfw_conf->{rules} || [];
2993     if ($rules && scalar(@$rules)) {
2994         $raw .= "[RULES]\n\n";
2995         $raw .= &$format_rules($rules, 1);
2996         $raw .= "\n";
2997     }
2998
2999     my $filename = "$pvefw_conf_dir/$vmid.fw";
3000     if ($raw) {
3001         mkdir $pvefw_conf_dir;
3002         PVE::Tools::file_set_contents($filename, $raw);
3003     } else {
3004         unlink $filename;
3005     }
3006 }
3007
3008 sub remove_vmfw_conf {
3009     my ($vmid) = @_;
3010
3011     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3012
3013     unlink $vmfw_conffile;
3014 }
3015
3016 sub clone_vmfw_conf {
3017     my ($vmid, $newid) = @_;
3018
3019     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3020     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3021
3022     if (-f $clonevm_conffile) {
3023         unlink $clonevm_conffile;
3024     }
3025     if (-f $sourcevm_conffile) {
3026         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3027         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3028     }
3029 }
3030
3031 sub read_vm_firewall_configs {
3032     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3033
3034     my $vmfw_configs = {};
3035
3036     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3037         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3038         next if !$vmfw_conf->{options}; # skip if file does not exists
3039         $vmfw_configs->{$vmid} = $vmfw_conf;
3040     }
3041     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3042         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3043         next if !$vmfw_conf->{options}; # skip if file does not exists
3044         $vmfw_configs->{$vmid} = $vmfw_conf;
3045     }
3046
3047     return $vmfw_configs;
3048 }
3049
3050 sub get_option_log_level {
3051     my ($options, $k) = @_;
3052
3053     my $v = $options->{$k};
3054     $v = $default_log_level if !defined($v);
3055
3056     return undef if $v eq '' || $v eq 'nolog';
3057
3058     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3059
3060     return $v if ($v >= 0) && ($v <= 7);
3061
3062     warn "unknown log level ($k = '$v')\n";
3063
3064     return undef;
3065 }
3066
3067 sub generate_std_chains {
3068     my ($ruleset, $options, $ipversion) = @_;
3069
3070     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3071
3072     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3073
3074     my $chain;
3075
3076     if ($ipversion == 4) {
3077         # same as shorewall smurflog.
3078         $chain = 'PVEFW-smurflog';
3079         $std_chains->{$chain} = [];
3080
3081         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3082         push @{$std_chains->{$chain}}, "-j DROP";
3083     }
3084
3085     # same as shorewall logflags action.
3086     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3087     $chain = 'PVEFW-logflags';
3088     $std_chains->{$chain} = [];
3089
3090     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3091     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3092     push @{$std_chains->{$chain}}, "-j DROP";
3093
3094     foreach my $chain (keys %$std_chains) {
3095         ruleset_create_chain($ruleset, $chain);
3096         foreach my $rule (@{$std_chains->{$chain}}) {
3097             if (ref($rule)) {
3098                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3099             } else {
3100                 ruleset_addrule($ruleset, $chain, $rule);
3101             }
3102         }
3103     }
3104 }
3105
3106 sub generate_ipset_chains {
3107     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3108
3109     foreach my $ipset (keys %{$ipsets}) {
3110
3111         my $options = $ipsets->{$ipset};
3112
3113         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3114             if (my $ips = $device_ips->{$1}) {
3115                 $options = [@$options, @$ips];
3116             }
3117         }
3118
3119         # remove duplicates
3120         my $nethash = {};
3121         foreach my $entry (@$options) {
3122             next if $entry->{errors}; # skip entries with errors
3123             eval {
3124                 my ($cidr, $ver);
3125                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3126                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3127                 } else {
3128                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3129                 }
3130                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3131                 if ($ver == 6) {
3132                     # ip_compress_address takes an address only, no CIDR
3133                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3134                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3135                     $cidr .= $prefix_len if defined($prefix_len);
3136                     $cidr =~ s|/128$||;
3137                 } else {
3138                     $cidr =~ s|/32$||;
3139                 }
3140
3141                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3142             };
3143             warn $@ if $@;
3144         }
3145
3146         foreach my $ipversion (4, 6) {
3147             my $data = $nethash->{$ipversion};
3148
3149             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3150
3151             my $hashsize = scalar(@$options);
3152             if ($hashsize <= 64) {
3153                 $hashsize = 64;
3154             } else {
3155                 $hashsize = round_powerof2($hashsize);
3156             }
3157
3158             my $family = $ipversion == "6" ? "inet6" : "inet";
3159
3160             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3161
3162             foreach my $cidr (sort keys %$data) {
3163                 my $entry = $data->{$cidr};
3164
3165                 my $cmd = "add $name $cidr";
3166                 if ($entry->{nomatch}) {
3167                     if ($feature_ipset_nomatch) {
3168                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3169                     } else {
3170                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3171                     }
3172                 } else {
3173                     push @{$ipset_ruleset->{$name}}, $cmd;
3174                 }
3175             }
3176         }
3177     }
3178 }
3179
3180 sub round_powerof2 {
3181     my ($int) = @_;
3182
3183     $int--;
3184     $int |= $int >> $_ foreach (1,2,4,8,16);
3185     return ++$int;
3186 }
3187
3188 sub load_clusterfw_conf {
3189     my ($filename, $verbose) = @_;
3190
3191     $filename = $clusterfw_conf_filename if !defined($filename);
3192
3193     my $cluster_conf = {};
3194     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3195         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3196     }
3197
3198     return $cluster_conf;
3199 }
3200
3201 sub save_clusterfw_conf {
3202     my ($cluster_conf) = @_;
3203
3204     my $raw = '';
3205
3206     my $options = $cluster_conf->{options};
3207     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3208
3209     my $aliases = $cluster_conf->{aliases};
3210     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3211
3212     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3213
3214     my $rules = $cluster_conf->{rules};
3215     if ($rules && scalar(@$rules)) {
3216         $raw .= "[RULES]\n\n";
3217         $raw .= &$format_rules($rules, 1);
3218         $raw .= "\n";
3219     }
3220
3221     if ($cluster_conf->{groups}) {
3222         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3223             my $rules = $cluster_conf->{groups}->{$group};
3224             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3225                 my $utf8comment = encode('utf8', $comment);
3226                 $raw .= "[group $group] # $utf8comment\n\n";
3227             } else {
3228                 $raw .= "[group $group]\n\n";
3229             }
3230
3231             $raw .= &$format_rules($rules, 0);
3232             $raw .= "\n";
3233         }
3234     }
3235
3236     if ($raw) {
3237         mkdir $pvefw_conf_dir;
3238         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3239     } else {
3240         unlink $clusterfw_conf_filename;
3241     }
3242 }
3243
3244 sub load_hostfw_conf {
3245     my ($cluster_conf, $filename, $verbose) = @_;
3246
3247     $filename = $hostfw_conf_filename if !defined($filename);
3248
3249     my $hostfw_conf = {};
3250     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3251         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3252     }
3253     return $hostfw_conf;
3254 }
3255
3256 sub save_hostfw_conf {
3257     my ($hostfw_conf) = @_;
3258
3259     my $raw = '';
3260
3261     my $options = $hostfw_conf->{options};
3262     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3263
3264     my $rules = $hostfw_conf->{rules};
3265     if ($rules && scalar(@$rules)) {
3266         $raw .= "[RULES]\n\n";
3267         $raw .= &$format_rules($rules, 1);
3268         $raw .= "\n";
3269     }
3270
3271     if ($raw) {
3272         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3273     } else {
3274         unlink $hostfw_conf_filename;
3275     }
3276 }
3277
3278 sub compile {
3279     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3280
3281     my $vmfw_configs;
3282
3283     if ($vmdata) { # test mode
3284         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3285         my $filename = "$testdir/cluster.fw";
3286         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3287
3288         $filename = "$testdir/host.fw";
3289         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3290
3291         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3292     } else { # normal operation
3293         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3294
3295         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3296
3297         $vmdata = read_local_vm_config();
3298         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3299     }
3300
3301     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3302
3303     my $localnet;
3304     if ($cluster_conf->{aliases}->{local_network}) {
3305         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3306     } else {
3307         my $localnet_ver;
3308         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3309
3310         $cluster_conf->{aliases}->{local_network} = {
3311             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3312     }
3313
3314     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3315
3316     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3317     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3318     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3319
3320     return ($ruleset, $ipset_ruleset, $rulesetv6);
3321 }
3322
3323 sub compile_iptables_filter {
3324     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3325
3326     my $ruleset = {};
3327
3328     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3329     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3330
3331     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3332
3333     my $hostfw_options = $hostfw_conf->{options} || {};
3334
3335     # fixme: what log level should we use here?
3336     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3337
3338     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3339
3340     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3341     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3342
3343     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3344
3345     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3346     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3347
3348     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3349
3350     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3351
3352     if ($hostfw_enable) {
3353         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3354         warn $@ if $@; # just to be sure - should not happen
3355     }
3356
3357     # generate firewall rules for QEMU VMs
3358     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3359         eval {
3360             my $conf = $vmdata->{qemu}->{$vmid};
3361             my $vmfw_conf = $vmfw_configs->{$vmid};
3362             return if !$vmfw_conf;
3363
3364             foreach my $netid (sort keys %$conf) {
3365                 next if $netid !~ m/^net(\d+)$/;
3366                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3367                 next if !$net->{firewall};
3368                 my $iface = "tap${vmid}i$1";
3369
3370                 my $macaddr = $net->{macaddr};
3371                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3372                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3373                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3374                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3375             }
3376         };
3377         warn $@ if $@; # just to be sure - should not happen
3378     }
3379
3380     # generate firewall rules for LXC containers
3381     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3382         eval {
3383             my $conf = $vmdata->{lxc}->{$vmid};
3384             my $vmfw_conf = $vmfw_configs->{$vmid};
3385             return if !$vmfw_conf;
3386
3387             if ($vmfw_conf->{options}->{enable}) {
3388                 foreach my $netid (sort keys %$conf) {
3389                     next if $netid !~ m/^net(\d+)$/;
3390                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3391                     next if !$net->{firewall};
3392                     my $iface = "veth${vmid}i$1";
3393                     my $macaddr = $net->{hwaddr};
3394                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3395                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3396                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3397                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3398                 }
3399             }
3400         };
3401         warn $@ if $@; # just to be sure - should not happen
3402     }
3403
3404     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3405         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3406     }
3407
3408     return $ruleset;
3409 }
3410
3411 sub mac_to_linklocal {
3412     my ($macaddr) = @_;
3413     my @parts = split(/:/, $macaddr);
3414     # The standard link local address uses the fe80::/64 prefix with the
3415     # modified EUI-64 identifier derived from the MAC address by flipping the
3416     # universal/local bit and inserting FF:FE in the middle.
3417     # See RFC 4291.
3418     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3419     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3420     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3421 }
3422
3423 sub compile_ipsets {
3424     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3425
3426     my $localnet;
3427     if ($cluster_conf->{aliases}->{local_network}) {
3428         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3429     } else {
3430         my $localnet_ver;
3431         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3432
3433         $cluster_conf->{aliases}->{local_network} = {
3434             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3435     }
3436
3437     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3438
3439
3440     my $ipset_ruleset = {};
3441
3442     # generate ipsets for QEMU VMs
3443     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3444         eval {
3445             my $conf = $vmdata->{qemu}->{$vmid};
3446             my $vmfw_conf = $vmfw_configs->{$vmid};
3447             return if !$vmfw_conf;
3448
3449             # When the 'ipfilter' option is enabled every device for which there
3450             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3451             # ipset.
3452             # The reason is that ipfilter ipsets are always filled with standard
3453             # IPv6 link-local filters.
3454             my $ipsets = $vmfw_conf->{ipset};
3455             my $implicit_sets = {};
3456
3457             my $device_ips = {};
3458             foreach my $netid (keys %$conf) {
3459                 next if $netid !~ m/^net(\d+)$/;
3460                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3461                 next if !$net->{firewall};
3462
3463                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3464                     $implicit_sets->{"ipfilter-$netid"} = [];
3465                 }
3466
3467                 my $macaddr = $net->{macaddr};
3468                 my $linklocal = mac_to_linklocal($macaddr);
3469                 $device_ips->{$netid} = [
3470                     { cidr => $linklocal },
3471                     { cidr => 'fe80::/10', nomatch => 1 }
3472                 ];
3473             }
3474
3475             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3476             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3477         };
3478         warn $@ if $@; # just to be sure - should not happen
3479     }
3480
3481     # generate firewall rules for LXC containers
3482     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3483         eval {
3484             my $conf = $vmdata->{lxc}->{$vmid};
3485             my $vmfw_conf = $vmfw_configs->{$vmid};
3486             return if !$vmfw_conf;
3487
3488             # When the 'ipfilter' option is enabled every device for which there
3489             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3490             # ipset.
3491             # The reason is that ipfilter ipsets are always filled with standard
3492             # IPv6 link-local filters, as well as the IP addresses configured
3493             # for the container.
3494             my $ipsets = $vmfw_conf->{ipset};
3495             my $implicit_sets = {};
3496
3497             my $device_ips = {};
3498             foreach my $netid (keys %$conf) {
3499                 next if $netid !~ m/^net(\d+)$/;
3500                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3501                 next if !$net->{firewall};
3502
3503                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3504                     $implicit_sets->{"ipfilter-$netid"} = [];
3505                 }
3506
3507                 my $macaddr = $net->{hwaddr};
3508                 my $linklocal = mac_to_linklocal($macaddr);
3509                 my $set = $device_ips->{$netid} = [
3510                     { cidr => $linklocal },
3511                     { cidr => 'fe80::/10', nomatch => 1 }
3512                 ];
3513                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3514                     push @$set, { cidr => $1 };
3515                 }
3516                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3517                     push @$set, { cidr => $1 };
3518                 }
3519             }
3520
3521             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3522             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3523         };
3524         warn $@ if $@; # just to be sure - should not happen
3525     }
3526
3527     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3528
3529     return $ipset_ruleset;
3530 }
3531
3532 sub get_ruleset_status {
3533     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3534
3535     my $statushash = {};
3536
3537     foreach my $chain (sort keys %$ruleset) {
3538         my $sig = &$digest_fn($ruleset->{$chain});
3539
3540         $statushash->{$chain}->{sig} = $sig;
3541
3542         my $oldsig = $active_chains->{$chain};
3543         if (!defined($oldsig)) {
3544             $statushash->{$chain}->{action} = 'create';
3545         } else {
3546             if ($oldsig eq $sig) {
3547                 $statushash->{$chain}->{action} = 'exists';
3548             } else {
3549                 $statushash->{$chain}->{action} = 'update';
3550             }
3551         }
3552         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3553         foreach my $cmd (@{$ruleset->{$chain}}) {
3554             print "\t$cmd\n" if $verbose;
3555         }
3556     }
3557
3558     foreach my $chain (sort keys %$active_chains) {
3559         if (!defined($ruleset->{$chain})) {
3560             my $sig = $active_chains->{$chain};
3561             $statushash->{$chain}->{action} = 'delete';
3562             $statushash->{$chain}->{sig} = $sig;
3563             print "delete $chain ($sig)\n" if $verbose;
3564         }
3565     }
3566
3567     return $statushash;
3568 }
3569
3570 sub print_sig_rule {
3571     my ($chain, $sig) = @_;
3572
3573     # We just use this to store a SHA1 checksum used to detect changes
3574     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3575 }
3576
3577 sub get_ruleset_cmdlist {
3578     my ($ruleset, $verbose, $iptablescmd) = @_;
3579
3580     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3581
3582     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3583     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3584
3585     # create missing chains first
3586     foreach my $chain (sort keys %$ruleset) {
3587         my $stat = $statushash->{$chain};
3588         die "internal error" if !$stat;
3589         next if $stat->{action} ne 'create';
3590
3591         $cmdlist .= ":$chain - [0:0]\n";
3592     }
3593
3594     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3595         my $chain = "PVEFW-$h";
3596         if ($ruleset->{$chain} && !$hooks->{$h}) {
3597             $cmdlist .= "-A $h -j $chain\n";
3598         }
3599     }
3600
3601     foreach my $chain (sort keys %$ruleset) {
3602         my $stat = $statushash->{$chain};
3603         die "internal error" if !$stat;
3604
3605         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3606             $cmdlist .= "-F $chain\n";
3607             foreach my $cmd (@{$ruleset->{$chain}}) {
3608                 $cmdlist .= "$cmd\n";
3609             }
3610             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3611         } elsif ($stat->{action} eq 'delete') {
3612             die "internal error"; # this should not happen
3613         } elsif ($stat->{action} eq 'exists') {
3614             # do nothing
3615         } else {
3616             die "internal error - unknown status '$stat->{action}'";
3617         }
3618     }
3619
3620     foreach my $chain (keys %$statushash) {
3621         next if $statushash->{$chain}->{action} ne 'delete';
3622         $cmdlist .= "-F $chain\n";
3623     }
3624     foreach my $chain (keys %$statushash) {
3625         next if $statushash->{$chain}->{action} ne 'delete';
3626         next if $chain eq 'PVEFW-INPUT';
3627         next if $chain eq 'PVEFW-OUTPUT';
3628         next if $chain eq 'PVEFW-FORWARD';
3629         $cmdlist .= "-X $chain\n";
3630     }
3631
3632     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3633
3634     $cmdlist .= "COMMIT\n";
3635
3636     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3637 }
3638
3639 sub get_ipset_cmdlist {
3640     my ($ruleset, $verbose) = @_;
3641
3642     my $cmdlist = "";
3643
3644     my $delete_cmdlist = "";
3645
3646     my $active_chains = ipset_get_chains();
3647     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3648
3649     # remove stale _swap chains
3650     foreach my $chain (keys %$active_chains) {
3651         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3652             $cmdlist .= "destroy $chain\n";
3653         }
3654     }
3655
3656     foreach my $chain (keys %$ruleset) {
3657         my $stat = $statushash->{$chain};
3658         die "internal error" if !$stat;
3659
3660         if ($stat->{action} eq 'create') {
3661             foreach my $cmd (@{$ruleset->{$chain}}) {
3662                 $cmdlist .= "$cmd\n";
3663             }
3664         }
3665     }
3666
3667     foreach my $chain (keys %$ruleset) {
3668         my $stat = $statushash->{$chain};
3669         die "internal error" if !$stat;
3670
3671         if ($stat->{action} eq 'update') {
3672             my $chain_swap = $chain."_swap";
3673
3674             foreach my $cmd (@{$ruleset->{$chain}}) {
3675                 $cmd =~ s/$chain/$chain_swap/;
3676                 $cmdlist .= "$cmd\n";
3677             }
3678             $cmdlist .= "swap $chain_swap $chain\n";
3679             $cmdlist .= "flush $chain_swap\n";
3680             $cmdlist .= "destroy $chain_swap\n";
3681         }
3682     }
3683
3684      # the remove unused chains
3685     foreach my $chain (keys %$statushash) {
3686         next if $statushash->{$chain}->{action} ne 'delete';
3687
3688         $delete_cmdlist .= "flush $chain\n";
3689         $delete_cmdlist .= "destroy $chain\n";
3690     }
3691
3692     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3693
3694     return ($cmdlist, $delete_cmdlist, $changes);
3695 }
3696
3697 sub apply_ruleset {
3698     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3699
3700     enable_bridge_firewall();
3701
3702     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3703         get_ipset_cmdlist($ipset_ruleset, $verbose);
3704
3705     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3706     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3707
3708     if ($verbose) {
3709         if ($ipset_changes) {
3710             print "ipset changes:\n";
3711             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3712             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3713         }
3714
3715         if ($changes) {
3716             print "iptables changes:\n";
3717             print $cmdlist;
3718         }
3719
3720         if ($changesv6) {
3721             print "ip6tables changes:\n";
3722             print $cmdlistv6;
3723         }
3724     }
3725
3726     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3727     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3728
3729     ipset_restore_cmdlist($ipset_create_cmdlist);
3730
3731     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3732     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3733
3734     iptables_restore_cmdlist($cmdlist);
3735
3736     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3737     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3738
3739     ip6tables_restore_cmdlist($cmdlistv6);
3740
3741     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3742     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3743
3744     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3745
3746     # test: re-read status and check if everything is up to date
3747     my $active_chains = iptables_get_chains();
3748     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3749
3750     my $errors;
3751     foreach my $chain (sort keys %$ruleset) {
3752         my $stat = $statushash->{$chain};
3753         if ($stat->{action} ne 'exists') {
3754             warn "unable to update chain '$chain'\n";
3755             $errors = 1;
3756         }
3757     }
3758
3759     my $active_chainsv6 = iptables_get_chains("ip6tables");
3760     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3761
3762     foreach my $chain (sort keys %$rulesetv6) {
3763         my $stat = $statushashv6->{$chain};
3764         if ($stat->{action} ne 'exists') {
3765             warn "unable to update chain '$chain'\n";
3766             $errors = 1;
3767         }
3768     }
3769
3770     die "unable to apply firewall changes\n" if $errors;
3771
3772     update_nf_conntrack_max($hostfw_conf);
3773
3774     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3775
3776 }
3777
3778 sub update_nf_conntrack_max {
3779     my ($hostfw_conf) = @_;
3780
3781     my $max = 65536; # reasonable default
3782
3783     my $options = $hostfw_conf->{options} || {};
3784
3785     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3786         $max = $options->{nf_conntrack_max};
3787         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3788     }
3789
3790     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3791     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3792
3793     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3794
3795     if ($current != $max) {
3796         my $hashsize = int($max/4);
3797         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3798         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3799     }
3800 }
3801
3802 sub update_nf_conntrack_tcp_timeout_established {
3803     my ($hostfw_conf) = @_;
3804
3805     my $options = $hostfw_conf->{options} || {};
3806
3807     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3808
3809     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3810 }
3811
3812 sub remove_pvefw_chains {
3813
3814     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3815     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3816     PVE::Firewall::remove_pvefw_chains_ipset();
3817
3818 }
3819
3820 sub remove_pvefw_chains_iptables {
3821     my ($iptablescmd) = @_;
3822
3823     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3824     my $cmdlist = "*filter\n";
3825
3826     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3827         if ($hooks->{$h}) {
3828             $cmdlist .= "-D $h -j PVEFW-$h\n";
3829         }
3830     }
3831
3832     foreach my $chain (keys %$chash) {
3833         $cmdlist .= "-F $chain\n";
3834     }
3835
3836     foreach my $chain (keys %$chash) {
3837         $cmdlist .= "-X $chain\n";
3838     }
3839     $cmdlist .= "COMMIT\n";
3840
3841     if($iptablescmd eq "ip6tables") {
3842         ip6tables_restore_cmdlist($cmdlist);
3843     } else {
3844         iptables_restore_cmdlist($cmdlist);
3845     }
3846 }
3847
3848 sub remove_pvefw_chains_ipset {
3849
3850     my $ipset_chains = ipset_get_chains();
3851
3852     my $cmdlist = "";
3853
3854     foreach my $chain (keys %$ipset_chains) {
3855         $cmdlist .= "flush $chain\n";
3856         $cmdlist .= "destroy $chain\n";
3857     }
3858
3859     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3860 }
3861
3862 sub init {
3863     my $cluster_conf = load_clusterfw_conf();
3864     my $cluster_options = $cluster_conf->{options};
3865     my $enable = $cluster_options->{enable};
3866
3867     return if !$enable;
3868
3869     # load required modules here
3870 }
3871
3872 sub update {
3873     my $code = sub {
3874
3875         my $cluster_conf = load_clusterfw_conf();
3876         my $cluster_options = $cluster_conf->{options};
3877
3878         if (!$cluster_options->{enable}) {
3879             PVE::Firewall::remove_pvefw_chains();
3880             return;
3881         }
3882
3883         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3884
3885         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3886
3887         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3888     };
3889
3890     run_locked($code);
3891 }
3892
3893 1;