src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::LXC
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_lxc;
  35 eval {
  36     require PVE::LXC;
  37     $have_lxc = 1;
  38 };
  39
  40
  41 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  42
  43 mkdir $pve_fw_status_dir; # make sure this exists
  44
  45 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48
  49 my $max_alias_name_length = 64;
  50 my $max_ipset_name_length = 64;
  51 my $max_group_name_length = 20;
  52
  53 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  54 sub pve_verify_ip_or_cidr {
  55     my ($cidr, $noerr) = @_;
  56
  57     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  58         return $cidr if Net::IP->new($cidr);
  59         return undef if $noerr;
  60         die Net::IP::Error() . "\n";
  61     }
  62     return undef if $noerr;
  63     die "value does not look like a valid IP address or CIDR network\n";
  64 }
  65
  66 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  67 sub pve_verify_ip_or_cidr_or_alias {
  68     my ($cidr, $noerr) = @_;
  69
  70     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  71
  72     return pve_verify_ip_or_cidr($cidr, $noerr);
  73 }
  74
  75 PVE::JSONSchema::register_standard_option('ipset-name', {
  76     description => "IP set name.",
  77     type => 'string',
  78     pattern => $ipset_name_pattern,
  79     minLength => 2,
  80     maxLength => $max_ipset_name_length,
  81 });
  82
  83 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  84     description => "Alias name.",
  85     type => 'string',
  86     pattern => $ip_alias_pattern,
  87     minLength => 2,
  88     maxLength => $max_alias_name_length,
  89 });
  90
  91 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  92     description => "Log level.",
  93     type => 'string',
  94     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  95     optional => 1,
  96 });
  97
  98 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  99     description => "Security Group name.",
 100     type => 'string',
 101     pattern => $security_group_name_pattern,
 102     minLength => 2,
 103     maxLength => $max_group_name_length,
 104 });
 105
 106 my $feature_ipset_nomatch = 0;
 107 eval  {
 108     my (undef, undef, $release) = POSIX::uname();
 109     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 110         my ($major, $minor) = ($1, $2);
 111         $feature_ipset_nomatch = 1 if ($major > 3) ||
 112             ($major == 3 && $minor >= 7);
 113     }
 114
 115 };
 116
 117 my $nodename = PVE::INotify::nodename();
 118
 119 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 120
 121 my $default_log_level = 'nolog'; # avoid logs by default
 122
 123 my $log_level_hash = {
 124     debug => 7,
 125     info => 6,
 126     notice => 5,
 127     warning => 4,
 128     err => 3,
 129     crit => 2,
 130     alert => 1,
 131     emerg => 0,
 132 };
 133
 134 # we need to overwrite some macros for ipv6
 135 my $pve_ipv6fw_macros = {
 136     'Ping' => [
 137         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 138     ],
 139     'NeighborDiscovery' => [
 140         "IPv6 neighbor solicitation, neighbor and router advertisement",
 141         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 145     ],
 146     'DHCPv6' => [
 147         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 148     ],
 149     'Trcrt' => [
 150         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 151         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 152     ],
 153  };
 154
 155 # imported/converted from: /usr/share/shorewall/macro.*
 156 my $pve_fw_macros = {
 157     'Amanda' => [
 158         "Amanda Backup",
 159         { action => 'PARAM', proto => 'udp', dport => '10080' },
 160         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 161     ],
 162     'Auth' => [
 163         "Auth (identd) traffic",
 164         { action => 'PARAM', proto => 'tcp', dport => '113' },
 165     ],
 166     'BGP' => [
 167         "Border Gateway Protocol traffic",
 168         { action => 'PARAM', proto => 'tcp', dport => '179' },
 169     ],
 170     'BitTorrent' => [
 171         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 172         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 173         { action => 'PARAM', proto => 'udp', dport => '6881' },
 174     ],
 175     'BitTorrent32' => [
 176         "BitTorrent traffic for BitTorrent 3.2 and later",
 177         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 178         { action => 'PARAM', proto => 'udp', dport => '6881' },
 179     ],
 180     'Ceph' => [
 181         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 182         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 183         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 184     ],
 185     'CVS' => [
 186         "Concurrent Versions System pserver traffic",
 187         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 188     ],
 189     'Citrix' => [
 190         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 191         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 192         { action => 'PARAM', proto => 'udp', dport => '1604' },
 193         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 194     ],
 195     'DAAP' => [
 196         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 197         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 198         { action => 'PARAM', proto => 'udp', dport => '3689' },
 199     ],
 200     'DCC' => [
 201         "Distributed Checksum Clearinghouse spam filtering mechanism",
 202         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 203     ],
 204     'DHCPfwd' => [
 205         "Forwarded DHCP traffic",
 206         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 207     ],
 208     'DNS' => [
 209         "Domain Name System traffic (upd and tcp)",
 210         { action => 'PARAM', proto => 'udp', dport => '53' },
 211         { action => 'PARAM', proto => 'tcp', dport => '53' },
 212     ],
 213     'Distcc' => [
 214         "Distributed Compiler service",
 215         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 216     ],
 217     'FTP' => [
 218         "File Transfer Protocol",
 219         { action => 'PARAM', proto => 'tcp', dport => '21' },
 220     ],
 221     'Finger' => [
 222         "Finger protocol (RFC 742)",
 223         { action => 'PARAM', proto => 'tcp', dport => '79' },
 224     ],
 225     'GNUnet' => [
 226         "GNUnet secure peer-to-peer networking traffic",
 227         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 228         { action => 'PARAM', proto => 'udp', dport => '2086' },
 229         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 230         { action => 'PARAM', proto => 'udp', dport => '1080' },
 231     ],
 232     'GRE' => [
 233         "Generic Routing Encapsulation tunneling protocol",
 234         { action => 'PARAM', proto => '47' },
 235     ],
 236     'Git' => [
 237         "Git distributed revision control traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 239     ],
 240     'HKP' => [
 241         "OpenPGP HTTP keyserver protocol traffic",
 242         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 243     ],
 244     'HTTP' => [
 245         "Hypertext Transfer Protocol (WWW)",
 246         { action => 'PARAM', proto => 'tcp', dport => '80' },
 247     ],
 248     'HTTPS' => [
 249         "Hypertext Transfer Protocol (WWW) over SSL",
 250         { action => 'PARAM', proto => 'tcp', dport => '443' },
 251     ],
 252     'ICPV2' => [
 253         "Internet Cache Protocol V2 (Squid) traffic",
 254         { action => 'PARAM', proto => 'udp', dport => '3130' },
 255     ],
 256     'ICQ' => [
 257         "AOL Instant Messenger traffic",
 258         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 259     ],
 260     'IMAP' => [
 261         "Internet Message Access Protocol",
 262         { action => 'PARAM', proto => 'tcp', dport => '143' },
 263     ],
 264     'IMAPS' => [
 265         "Internet Message Access Protocol over SSL",
 266         { action => 'PARAM', proto => 'tcp', dport => '993' },
 267     ],
 268     'IPIP' => [
 269         "IPIP capsulation traffic",
 270         { action => 'PARAM', proto => '94' },
 271     ],
 272     'IPsec' => [
 273         "IPsec traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 275         { action => 'PARAM', proto => '50' },
 276     ],
 277     'IPsecah' => [
 278         "IPsec authentication (AH) traffic",
 279         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 280         { action => 'PARAM', proto => '51' },
 281     ],
 282     'IPsecnat' => [
 283         "IPsec traffic and Nat-Traversal",
 284         { action => 'PARAM', proto => 'udp', dport => '500' },
 285         { action => 'PARAM', proto => 'udp', dport => '4500' },
 286         { action => 'PARAM', proto => '50' },
 287     ],
 288     'IRC' => [
 289         "Internet Relay Chat traffic",
 290         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 291     ],
 292     'Jetdirect' => [
 293         "HP Jetdirect printing",
 294         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 295     ],
 296     'L2TP' => [
 297         "Layer 2 Tunneling Protocol traffic",
 298         { action => 'PARAM', proto => 'udp', dport => '1701' },
 299     ],
 300     'LDAP' => [
 301         "Lightweight Directory Access Protocol traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '389' },
 303     ],
 304     'LDAPS' => [
 305         "Secure Lightweight Directory Access Protocol traffic",
 306         { action => 'PARAM', proto => 'tcp', dport => '636' },
 307     ],
 308     'MSNP' => [
 309         "Microsoft Notification Protocol",
 310         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 311     ],
 312     'MSSQL' => [
 313         "Microsoft SQL Server",
 314         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 315     ],
 316     'Mail' => [
 317         "Mail traffic (SMTP, SMTPS, Submission)",
 318         { action => 'PARAM', proto => 'tcp', dport => '25' },
 319         { action => 'PARAM', proto => 'tcp', dport => '465' },
 320         { action => 'PARAM', proto => 'tcp', dport => '587' },
 321     ],
 322     'Munin' => [
 323         "Munin networked resource monitoring traffic",
 324         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 325     ],
 326     'MySQL' => [
 327         "MySQL server",
 328         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 329     ],
 330     'NNTP' => [
 331         "NNTP traffic (Usenet).",
 332         { action => 'PARAM', proto => 'tcp', dport => '119' },
 333     ],
 334     'NNTPS' => [
 335         "Encrypted NNTP traffic (Usenet)",
 336         { action => 'PARAM', proto => 'tcp', dport => '563' },
 337     ],
 338     'NTP' => [
 339         "Network Time Protocol (ntpd)",
 340         { action => 'PARAM', proto => 'udp', dport => '123' },
 341     ],
 342     'OSPF' => [
 343         "OSPF multicast traffic",
 344         { action => 'PARAM', proto => '89' },
 345     ],
 346     'OpenVPN' => [
 347         "OpenVPN traffic",
 348         { action => 'PARAM', proto => 'udp', dport => '1194' },
 349     ],
 350     'PCA' => [
 351         "Symantec PCAnywere (tm)",
 352         { action => 'PARAM', proto => 'udp', dport => '5632' },
 353         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 354     ],
 355     'POP3' => [
 356         "POP3 traffic",
 357         { action => 'PARAM', proto => 'tcp', dport => '110' },
 358     ],
 359     'POP3S' => [
 360         "Encrypted POP3 traffic",
 361         { action => 'PARAM', proto => 'tcp', dport => '995' },
 362     ],
 363     'PPtP' => [
 364         "Point-to-Point Tunneling Protocol",
 365         { action => 'PARAM', proto => '47' },
 366         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 367     ],
 368     'Ping' => [
 369         "ICMP echo request",
 370         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 371     ],
 372     'PostgreSQL' => [
 373         "PostgreSQL server",
 374         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 375     ],
 376     'Printer' => [
 377         "Line Printer protocol printing",
 378         { action => 'PARAM', proto => 'tcp', dport => '515' },
 379     ],
 380     'RDP' => [
 381         "Microsoft Remote Desktop Protocol traffic",
 382         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 383     ],
 384     'RIP' => [
 385         "Routing Information Protocol (bidirectional)",
 386         { action => 'PARAM', proto => 'udp', dport => '520' },
 387     ],
 388     'RNDC' => [
 389         "BIND remote management protocol",
 390         { action => 'PARAM', proto => 'tcp', dport => '953' },
 391     ],
 392     'Razor' => [
 393         "Razor Antispam System",
 394         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 395     ],
 396     'Rdate' => [
 397         "Remote time retrieval (rdate)",
 398         { action => 'PARAM', proto => 'tcp', dport => '37' },
 399     ],
 400     'Rsync' => [
 401         "Rsync server",
 402         { action => 'PARAM', proto => 'tcp', dport => '873' },
 403     ],
 404     'SANE' => [
 405         "SANE network scanning",
 406         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 407     ],
 408     'SMB' => [
 409         "Microsoft SMB traffic",
 410         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 411         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 412         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 413         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 414     ],
 415     'SMBswat' => [
 416         "Samba Web Administration Tool",
 417         { action => 'PARAM', proto => 'tcp', dport => '901' },
 418     ],
 419     'SMTP' => [
 420         "Simple Mail Transfer Protocol",
 421         { action => 'PARAM', proto => 'tcp', dport => '25' },
 422     ],
 423     'SMTPS' => [
 424         "Encrypted Simple Mail Transfer Protocol",
 425         { action => 'PARAM', proto => 'tcp', dport => '465' },
 426     ],
 427     'SNMP' => [
 428         "Simple Network Management Protocol",
 429         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 430         { action => 'PARAM', proto => 'tcp', dport => '161' },
 431     ],
 432     'SPAMD' => [
 433         "Spam Assassin SPAMD traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '783' },
 435     ],
 436     'SSH' => [
 437         "Secure shell traffic",
 438         { action => 'PARAM', proto => 'tcp', dport => '22' },
 439     ],
 440     'SVN' => [
 441         "Subversion server (svnserve)",
 442         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 443     ],
 444     'SixXS' => [
 445         "SixXS IPv6 Deployment and Tunnel Broker",
 446         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 447         { action => 'PARAM', proto => 'udp', dport => '3740' },
 448         { action => 'PARAM', proto => '41' },
 449         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 450     ],
 451     'Squid' => [
 452         "Squid web proxy traffic",
 453         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 454     ],
 455     'Submission' => [
 456         "Mail message submission traffic",
 457         { action => 'PARAM', proto => 'tcp', dport => '587' },
 458     ],
 459     'Syslog' => [
 460         "Syslog protocol (RFC 5424) traffic",
 461         { action => 'PARAM', proto => 'udp', dport => '514' },
 462         { action => 'PARAM', proto => 'tcp', dport => '514' },
 463     ],
 464     'TFTP' => [
 465         "Trivial File Transfer Protocol traffic",
 466         { action => 'PARAM', proto => 'udp', dport => '69' },
 467     ],
 468     'Telnet' => [
 469         "Telnet traffic",
 470         { action => 'PARAM', proto => 'tcp', dport => '23' },
 471     ],
 472     'Telnets' => [
 473         "Telnet over SSL",
 474         { action => 'PARAM', proto => 'tcp', dport => '992' },
 475     ],
 476     'Time' => [
 477         "RFC 868 Time protocol",
 478         { action => 'PARAM', proto => 'tcp', dport => '37' },
 479     ],
 480     'Trcrt' => [
 481         "Traceroute (for up to 30 hops) traffic",
 482         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 483         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 484     ],
 485     'VNC' => [
 486         "VNC traffic for VNC display's 0 - 99",
 487         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 488     ],
 489     'VNCL' => [
 490         "VNC traffic from Vncservers to Vncviewers in listen mode",
 491         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 492     ],
 493     'Web' => [
 494         "WWW traffic (HTTP and HTTPS)",
 495         { action => 'PARAM', proto => 'tcp', dport => '80' },
 496         { action => 'PARAM', proto => 'tcp', dport => '443' },
 497     ],
 498     'Webcache' => [
 499         "Web Cache/Proxy traffic (port 8080)",
 500         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 501     ],
 502     'Webmin' => [
 503         "Webmin traffic",
 504         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 505     ],
 506     'Whois' => [
 507         "Whois (nicname, RFC 3912) traffic",
 508         { action => 'PARAM', proto => 'tcp', dport => '43' },
 509     ],
 510 };
 511
 512 my $pve_fw_parsed_macros;
 513 my $pve_fw_macro_descr;
 514 my $pve_fw_macro_ipversion = {};
 515 my $pve_fw_preferred_macro_names = {};
 516
 517 my $pve_std_chains = {};
 518 $pve_std_chains->{4} = {
 519     'PVEFW-SET-ACCEPT-MARK' => [
 520         "-j MARK --set-mark 1",
 521     ],
 522     'PVEFW-DropBroadcast' => [
 523         # same as shorewall 'Broadcast'
 524         # simply DROP BROADCAST/MULTICAST/ANYCAST
 525         # we can use this to reduce logging
 526         { action => 'DROP', dsttype => 'BROADCAST' },
 527         { action => 'DROP', dsttype => 'MULTICAST' },
 528         { action => 'DROP', dsttype => 'ANYCAST' },
 529         { action => 'DROP', dest => '224.0.0.0/4' },
 530     ],
 531     'PVEFW-reject' => [
 532         # same as shorewall 'reject'
 533         { action => 'DROP', dsttype => 'BROADCAST' },
 534         { action => 'DROP', source => '224.0.0.0/4' },
 535         { action => 'DROP', proto => 'icmp' },
 536         "-p tcp -j REJECT --reject-with tcp-reset",
 537         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 538         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 539         "-j REJECT --reject-with icmp-host-prohibited",
 540     ],
 541     'PVEFW-Drop' => [
 542         # same as shorewall 'Drop', which is equal to DROP,
 543         # but REJECT/DROP some packages to reduce logging,
 544         # and ACCEPT critical ICMP types
 545         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 546         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 547         { action => 'PVEFW-DropBroadcast' },
 548         # ACCEPT critical ICMP types
 549         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 550         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 551         # Drop packets with INVALID state
 552         "-m conntrack --ctstate INVALID -j DROP",
 553         # Drop Microsoft SMB noise
 554         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 555         { action => 'DROP', proto => 'udp', dport => '137:139'},
 556         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 557         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 558         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 559         # Drop new/NotSyn traffic so that it doesn't get logged
 560         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 561         # Drop DNS replies
 562         { action => 'DROP', proto => 'udp', sport => 53 },
 563     ],
 564     'PVEFW-Reject' => [
 565         # same as shorewall 'Reject', which is equal to Reject,
 566         # but REJECT/DROP some packages to reduce logging,
 567         # and ACCEPT critical ICMP types
 568         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 569         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 570         { action => 'PVEFW-DropBroadcast' },
 571         # ACCEPT critical ICMP types
 572         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 573         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 574         # Drop packets with INVALID state
 575         "-m conntrack --ctstate INVALID -j DROP",
 576         # Drop Microsoft SMB noise
 577         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 578         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 579         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 580         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 581         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 582         # Drop new/NotSyn traffic so that it doesn't get logged
 583         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 584         # Drop DNS replies
 585         { action => 'DROP', proto => 'udp', sport => 53 },
 586     ],
 587     'PVEFW-tcpflags' => [
 588         # same as shorewall tcpflags action.
 589         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 590         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 591         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 592         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 593         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 594         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 595     ],
 596     'PVEFW-smurfs' => [
 597         # same as shorewall smurfs action
 598         # Filter packets for smurfs (packets with a broadcast address as the source).
 599         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 600         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 601         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 602     ],
 603 };
 604
 605 $pve_std_chains->{6} = {
 606     'PVEFW-SET-ACCEPT-MARK' => [
 607         "-j MARK --set-mark 1",
 608     ],
 609     'PVEFW-DropBroadcast' => [
 610         # same as shorewall 'Broadcast'
 611         # simply DROP BROADCAST/MULTICAST/ANYCAST
 612         # we can use this to reduce logging
 613         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 614         # ipv6 addrtype does not work with kernel 2.6.32
 615         #{ action => 'DROP', dsttype => 'MULTICAST' },
 616         #{ action => 'DROP', dsttype => 'ANYCAST' },
 617         { action => 'DROP', dest => 'ff00::/8' },
 618         #{ action => 'DROP', dest => '224.0.0.0/4' },
 619     ],
 620     'PVEFW-reject' => [
 621         # same as shorewall 'reject'
 622         #{ action => 'DROP', dsttype => 'BROADCAST' },
 623         #{ action => 'DROP', source => '224.0.0.0/4' },
 624         { action => 'DROP', proto => 'icmpv6' },
 625         "-p tcp -j REJECT --reject-with tcp-reset",
 626         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 627         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 628         #"-j REJECT --reject-with icmp-host-prohibited",
 629     ],
 630     'PVEFW-Drop' => [
 631         # same as shorewall 'Drop', which is equal to DROP,
 632         # but REJECT/DROP some packages to reduce logging,
 633         # and ACCEPT critical ICMP types
 634         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 635         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 636         { action => 'PVEFW-DropBroadcast' },
 637         # ACCEPT critical ICMP types
 638         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 639         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 640         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 641
 642         # Drop packets with INVALID state
 643         "-m conntrack --ctstate INVALID -j DROP",
 644         # Drop Microsoft SMB noise
 645         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 646         { action => 'DROP', proto => 'udp', dport => '137:139'},
 647         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 648         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 649         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 650         # Drop new/NotSyn traffic so that it doesn't get logged
 651         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 652         # Drop DNS replies
 653         { action => 'DROP', proto => 'udp', sport => 53 },
 654     ],
 655     'PVEFW-Reject' => [
 656         # same as shorewall 'Reject', which is equal to Reject,
 657         # but REJECT/DROP some packages to reduce logging,
 658         # and ACCEPT critical ICMP types
 659         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 660         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 661         { action => 'PVEFW-DropBroadcast' },
 662         # ACCEPT critical ICMP types
 663         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 664         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 665         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 666
 667         # Drop packets with INVALID state
 668         "-m conntrack --ctstate INVALID -j DROP",
 669         # Drop Microsoft SMB noise
 670         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 671         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 672         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 673         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 674         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 675         # Drop new/NotSyn traffic so that it doesn't get logged
 676         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 677         # Drop DNS replies
 678         { action => 'DROP', proto => 'udp', sport => 53 },
 679     ],
 680     'PVEFW-tcpflags' => [
 681         # same as shorewall tcpflags action.
 682         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 683         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 684         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 685         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 686         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 687         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 688     ],
 689 };
 690
 691 # iptables -p icmp -h
 692 my $icmp_type_names = {
 693     any => 1,
 694     'echo-reply' => 1,
 695     'destination-unreachable' => 1,
 696     'network-unreachable' => 1,
 697     'host-unreachable' => 1,
 698     'protocol-unreachable' => 1,
 699     'port-unreachable' => 1,
 700     'fragmentation-needed' => 1,
 701     'source-route-failed' => 1,
 702     'network-unknown' => 1,
 703     'host-unknown' => 1,
 704     'network-prohibited' => 1,
 705     'host-prohibited' => 1,
 706     'TOS-network-unreachable' => 1,
 707     'TOS-host-unreachable' => 1,
 708     'communication-prohibited' => 1,
 709     'host-precedence-violation' => 1,
 710     'precedence-cutoff' => 1,
 711     'source-quench' => 1,
 712     'redirect' => 1,
 713     'network-redirect' => 1,
 714     'host-redirect' => 1,
 715     'TOS-network-redirect' => 1,
 716     'TOS-host-redirect' => 1,
 717     'echo-request' => 1,
 718     'router-advertisement' => 1,
 719     'router-solicitation' => 1,
 720     'time-exceeded' => 1,
 721     'ttl-zero-during-transit' => 1,
 722     'ttl-zero-during-reassembly' => 1,
 723     'parameter-problem' => 1,
 724     'ip-header-bad' => 1,
 725     'required-option-missing' => 1,
 726     'timestamp-request' => 1,
 727     'timestamp-reply' => 1,
 728     'address-mask-request' => 1,
 729     'address-mask-reply' => 1,
 730 };
 731
 732 # ip6tables -p icmpv6 -h
 733
 734 my $icmpv6_type_names = {
 735     'any' => 1,
 736     'destination-unreachable' => 1,
 737     'no-route' => 1,
 738     'communication-prohibited' => 1,
 739     'address-unreachable' => 1,
 740     'port-unreachable' => 1,
 741     'packet-too-big' => 1,
 742     'time-exceeded' => 1,
 743     'ttl-zero-during-transit' => 1,
 744     'ttl-zero-during-reassembly' => 1,
 745     'parameter-problem' => 1,
 746     'bad-header' => 1,
 747     'unknown-header-type' => 1,
 748     'unknown-option' => 1,
 749     'echo-request' => 1,
 750     'echo-reply' => 1,
 751     'router-solicitation' => 1,
 752     'router-advertisement' => 1,
 753     'neighbor-solicitation' => 1,
 754     'neighbour-solicitation' => 1,
 755     'neighbor-advertisement' => 1,
 756     'neighbour-advertisement' => 1,
 757     'redirect' => 1,
 758 };
 759
 760 sub init_firewall_macros {
 761
 762     $pve_fw_parsed_macros = {};
 763
 764     my $parse = sub {
 765         my ($k, $macro) = @_;
 766         my $lc_name = lc($k);
 767         $pve_fw_macro_ipversion->{$k} = 0;
 768         while (!ref($macro->[0])) {
 769             my $desc = shift @$macro;
 770             if ($desc eq 'ipv4only') {
 771                 $pve_fw_macro_ipversion->{$k} = 4;
 772             } elsif ($desc eq 'ipv6only') {
 773                 $pve_fw_macro_ipversion->{$k} = 6;
 774             } else {
 775                 $pve_fw_macro_descr->{$k} = $desc;
 776             }
 777         }
 778         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 779         $pve_fw_parsed_macros->{$k} = $macro;
 780     };
 781
 782     foreach my $k (keys %$pve_fw_macros) {
 783         &$parse($k, $pve_fw_macros->{$k});
 784     }
 785
 786     foreach my $k (keys %$pve_ipv6fw_macros) {
 787         next if $pve_fw_parsed_macros->{$k};
 788         &$parse($k, $pve_ipv6fw_macros->{$k});
 789         $pve_fw_macro_ipversion->{$k} = 6;
 790     }
 791 }
 792
 793 init_firewall_macros();
 794
 795 sub get_macros {
 796     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 797 }
 798
 799 my $etc_services;
 800
 801 sub get_etc_services {
 802
 803     return $etc_services if $etc_services;
 804
 805     my $filename = "/etc/services";
 806
 807     my $fh = IO::File->new($filename, O_RDONLY);
 808     if (!$fh) {
 809         warn "unable to read '$filename' - $!\n";
 810         return {};
 811     }
 812
 813     my $services = {};
 814
 815     while (my $line = <$fh>) {
 816         chomp ($line);
 817         next if $line =~m/^#/;
 818         next if ($line =~m/^\s*$/);
 819
 820         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 821             $services->{byid}->{$2}->{name} = $1;
 822             $services->{byid}->{$2}->{port} = $2;
 823             $services->{byid}->{$2}->{$3} = 1;
 824             $services->{byname}->{$1} = $services->{byid}->{$2};
 825         }
 826     }
 827
 828     close($fh);
 829
 830     $etc_services = $services;
 831
 832
 833     return $etc_services;
 834 }
 835
 836 my $etc_protocols;
 837
 838 sub get_etc_protocols {
 839     return $etc_protocols if $etc_protocols;
 840
 841     my $filename = "/etc/protocols";
 842
 843     my $fh = IO::File->new($filename, O_RDONLY);
 844     if (!$fh) {
 845         warn "unable to read '$filename' - $!\n";
 846         return {};
 847     }
 848
 849     my $protocols = {};
 850
 851     while (my $line = <$fh>) {
 852         chomp ($line);
 853         next if $line =~m/^#/;
 854         next if ($line =~m/^\s*$/);
 855
 856         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 857             $protocols->{byid}->{$2}->{name} = $1;
 858             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 859         }
 860     }
 861
 862     close($fh);
 863
 864     # add special case for ICMP v6
 865     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 866     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 867
 868     $etc_protocols = $protocols;
 869
 870     return $etc_protocols;
 871 }
 872
 873 my $ipv4_mask_hash_localnet = {
 874     '255.255.0.0' => 16,
 875     '255.255.128.0' => 17,
 876     '255.255.192.0' => 18,
 877     '255.255.224.0' => 19,
 878     '255.255.240.0' => 20,
 879     '255.255.248.0' => 21,
 880     '255.255.252.0' => 22,
 881     '255.255.254.0' => 23,
 882     '255.255.255.0' => 24,
 883     '255.255.255.128' => 25,
 884     '255.255.255.192' => 26,
 885     '255.255.255.224' => 27,
 886     '255.255.255.240' => 28,
 887     '255.255.255.248' => 29,
 888     '255.255.255.252' => 30,
 889 };
 890
 891 my $__local_network;
 892
 893 sub local_network {
 894     my ($new_value) = @_;
 895
 896     $__local_network = $new_value if defined($new_value);
 897
 898     return $__local_network if defined($__local_network);
 899
 900     eval {
 901         my $nodename = PVE::INotify::nodename();
 902
 903         my $ip = PVE::Cluster::remote_node_ip($nodename);
 904
 905         my $testip = Net::IP->new($ip);
 906
 907         my $isv6 = $testip->version == 6;
 908         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 909                            : PVE::ProcFSTools::read_proc_net_route();
 910         foreach my $entry (@$routes) {
 911             my $mask;
 912             if ($isv6) {
 913                 $mask = $entry->{prefix};
 914             } else {
 915                 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 916                 next if !defined($mask);
 917             }
 918             my $cidr = "$entry->{dest}/$mask";
 919             my $testnet = Net::IP->new($cidr);
 920             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 921                 $__local_network = $cidr;
 922                 return;
 923             }
 924         }
 925     };
 926     warn $@ if $@;
 927
 928     return $__local_network;
 929 }
 930
 931 # ipset names are limited to 31 characters,
 932 # and we use '-v4' or '-v6' to indicate IP versions,
 933 # and we use '_swap' suffix for atomic update,
 934 # for example PVEFW-${VMID}-${ipset_name}_swap
 935
 936 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 937
 938 sub compute_ipset_chain_name {
 939     my ($vmid, $ipset_name, $ipversion) = @_;
 940
 941     $vmid = 0 if !defined($vmid);
 942
 943     my $id = "$vmid-${ipset_name}-v$ipversion";
 944
 945     if (length($id) > $max_iptables_ipset_name_length) {
 946         $id = PVE::Tools::fnv31a_hex($id);
 947     }
 948
 949     return "PVEFW-$id";
 950 }
 951
 952 sub compute_ipfilter_ipset_name {
 953     my ($iface) = @_;
 954
 955     return "ipfilter-$iface";
 956 }
 957
 958 sub parse_address_list {
 959     my ($str) = @_;
 960
 961     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 962         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 963         return;
 964     }
 965
 966     if ($str =~ m/^${ip_alias_pattern}$/) {
 967         die "alias name too long\n" if length($str) > $max_alias_name_length;
 968         return;
 969     }
 970
 971     my $count = 0;
 972     my $iprange = 0;
 973     my $ipversion;
 974
 975     foreach my $elem (split(/,/, $str)) {
 976         $count++;
 977         my $ip = Net::IP->new($elem);
 978         if (!$ip) {
 979             my $err = Net::IP::Error();
 980             die "invalid IP address: $err\n";
 981         }
 982         $iprange = 1 if $elem =~ m/-/;
 983
 984         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 985
 986         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 987             if $ipversion && ($new_ipversion != $ipversion);
 988
 989         $ipversion = $new_ipversion;
 990     }
 991
 992     die "you can't use a range in a list\n" if $iprange && $count > 1;
 993
 994     return $ipversion;
 995 }
 996
 997 sub parse_port_name_number_or_range {
 998     my ($str, $dport) = @_;
 999
1000     my $services = PVE::Firewall::get_etc_services();
1001     my $count = 0;
1002     my $icmp_port = 0;
1003
1004     foreach my $item (split(/,/, $str)) {
1005         $count++;
1006         if ($item =~ m/^(\d+):(\d+)$/) {
1007             my ($port1, $port2) = ($1, $2);
1008             die "invalid port '$port1'\n" if $port1 > 65535;
1009             die "invalid port '$port2'\n" if $port2 > 65535;
1010         } elsif ($item =~ m/^(\d+)$/) {
1011             my $port = $1;
1012             die "invalid port '$port'\n" if $port > 65535;
1013         } else {
1014             if ($dport && $icmp_type_names->{$item}) {
1015                 $icmp_port = 1;
1016             } elsif ($dport && $icmpv6_type_names->{$item}) {
1017                 $icmp_port = 1;
1018             } else {
1019                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1020             }
1021         }
1022     }
1023
1024     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1025
1026     return $count;
1027 }
1028
1029 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1030 sub pve_fw_verify_sport_spec {
1031    my ($portstr) = @_;
1032
1033    parse_port_name_number_or_range($portstr, 0);
1034
1035    return $portstr;
1036 }
1037
1038 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1039 sub pve_fw_verify_dport_spec {
1040    my ($portstr) = @_;
1041
1042    parse_port_name_number_or_range($portstr, 1);
1043
1044    return $portstr;
1045 }
1046
1047 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1048 sub pve_fw_verify_addr_spec {
1049    my ($list) = @_;
1050
1051    parse_address_list($list);
1052
1053    return $list;
1054 }
1055
1056 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1057 sub pve_fw_verify_protocol_spec {
1058    my ($proto) = @_;
1059
1060    my $protocols = get_etc_protocols();
1061
1062    die "unknown protocol '$proto'\n" if $proto &&
1063        !(defined($protocols->{byname}->{$proto}) ||
1064          defined($protocols->{byid}->{$proto}));
1065
1066    return $proto;
1067 }
1068
1069
1070 # helper function for API
1071
1072 sub copy_opject_with_digest {
1073     my ($object) = @_;
1074
1075     my $sha = Digest::SHA->new('sha1');
1076
1077     my $res = {};
1078     foreach my $k (sort keys %$object) {
1079         my $v = $object->{$k};
1080         next if !defined($v);
1081         $res->{$k} = $v;
1082         $sha->add($k, ':', $v, "\n");
1083     }
1084
1085     my $digest = $sha->hexdigest;
1086
1087     $res->{digest} = $digest;
1088
1089     return wantarray ? ($res, $digest) : $res;
1090 }
1091
1092 sub copy_list_with_digest {
1093     my ($list) = @_;
1094
1095     my $sha = Digest::SHA->new('sha1');
1096
1097     my $res = [];
1098     foreach my $entry (@$list) {
1099         my $data = {};
1100         foreach my $k (sort keys %$entry) {
1101             my $v = $entry->{$k};
1102             next if !defined($v);
1103             $data->{$k} = $v;
1104             # Note: digest ignores refs ($rule->{errors})
1105             # since Digest::SHA expects a series of bytes,
1106             #  we have to encode the value here to prevent errors when
1107             #  using utf8 characters (eg. in comments)
1108             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1109         }
1110         push @$res, $data;
1111     }
1112
1113     my $digest = $sha->hexdigest;
1114
1115     foreach my $entry (@$res) {
1116         $entry->{digest} = $digest;
1117     }
1118
1119     return wantarray ? ($res, $digest) : $res;
1120 }
1121
1122 my $rule_properties = {
1123     pos => {
1124         description => "Update rule at position <pos>.",
1125         type => 'integer',
1126         minimum => 0,
1127         optional => 1,
1128     },
1129     digest => get_standard_option('pve-config-digest'),
1130     type => {
1131         type => 'string',
1132         optional => 1,
1133         enum => ['in', 'out', 'group'],
1134     },
1135     action => {
1136         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1137         type => 'string',
1138         optional => 1,
1139         pattern => $security_group_name_pattern,
1140         maxLength => 20,
1141         minLength => 2,
1142     },
1143     macro => {
1144         type => 'string',
1145         optional => 1,
1146         maxLength => 128,
1147     },
1148     iface => get_standard_option('pve-iface', { optional => 1 }),
1149     source => {
1150         type => 'string', format => 'pve-fw-addr-spec',
1151         optional => 1,
1152     },
1153     dest => {
1154         type => 'string', format => 'pve-fw-addr-spec',
1155         optional => 1,
1156     },
1157     proto => {
1158         type => 'string', format => 'pve-fw-protocol-spec',
1159         optional => 1,
1160     },
1161     enable => {
1162         type => 'integer',
1163         minimum => 0,
1164         optional => 1,
1165     },
1166     sport => {
1167         type => 'string', format => 'pve-fw-sport-spec',
1168         optional => 1,
1169     },
1170     dport => {
1171         type => 'string', format => 'pve-fw-dport-spec',
1172         optional => 1,
1173     },
1174     comment => {
1175         type => 'string',
1176         optional => 1,
1177     },
1178 };
1179
1180 sub add_rule_properties {
1181     my ($properties) = @_;
1182
1183     foreach my $k (keys %$rule_properties) {
1184         my $h = $rule_properties->{$k};
1185         # copy data, so that we can modify later without side effects
1186         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1187     }
1188
1189     return $properties;
1190 }
1191
1192 sub delete_rule_properties {
1193     my ($rule, $delete_str) = @_;
1194
1195     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1196         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1197             if !defined($rule_properties->{$opt});
1198         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1199             if $opt eq 'type' || $opt eq 'action';
1200         delete $rule->{$opt};
1201     }
1202
1203     return $rule;
1204 }
1205
1206 my $apply_macro = sub {
1207     my ($macro_name, $param, $verify, $ipversion) = @_;
1208
1209     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1210     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1211
1212     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1213         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1214     }
1215
1216     # skip macros which are specific to another ipversion
1217     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1218         return if $ipversion != $required;
1219     }
1220
1221     my $rules = [];
1222
1223     foreach my $templ (@$macro_rules) {
1224         my $rule = {};
1225         my $param_used = {};
1226         foreach my $k (keys %$templ) {
1227             my $v = $templ->{$k};
1228             if ($v eq 'PARAM') {
1229                 $v = $param->{$k};
1230                 $param_used->{$k} = 1;
1231             } elsif ($v eq 'DEST') {
1232                 $v = $param->{dest};
1233                 $param_used->{dest} = 1;
1234             } elsif ($v eq 'SOURCE') {
1235                 $v = $param->{source};
1236                 $param_used->{source} = 1;
1237             }
1238
1239             if (!defined($v)) {
1240                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1241                 raise_param_exc({ macro => $msg }) if $verify;
1242                 die "$msg\n";
1243             }
1244             $rule->{$k} = $v;
1245         }
1246         foreach my $k (keys %$param) {
1247             next if $k eq 'macro';
1248             next if !defined($param->{$k});
1249             next if $param_used->{$k};
1250             if (defined($rule->{$k})) {
1251                 if ($rule->{$k} ne $param->{$k}) {
1252                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1253                     raise_param_exc({ $k => $msg }) if $verify;
1254                     die "$msg\n";
1255                 }
1256             } else {
1257                 $rule->{$k} = $param->{$k};
1258             }
1259         }
1260         push @$rules, $rule;
1261     }
1262
1263     return $rules;
1264 };
1265
1266 my $rule_env_iface_lookup = {
1267     'ct' => 1,
1268     'vm' => 1,
1269     'group' => 0,
1270     'cluster' => 1,
1271     'host' => 1,
1272 };
1273
1274 sub verify_rule {
1275     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1276
1277     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1278
1279     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1280     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1281
1282     my $errors = $rule->{errors} || {};
1283
1284     my $error_count = 0;
1285
1286     my $add_error = sub {
1287         my ($param, $msg)  = @_;
1288         chomp $msg;
1289         raise_param_exc({ $param => $msg }) if !$noerr;
1290         $error_count++;
1291         $errors->{$param} = $msg if !$errors->{$param};
1292     };
1293
1294     my $ipversion;
1295     my $set_ip_version = sub {
1296         my $vers = shift;
1297         if ($vers) {
1298             die "detected mixed ipv4/ipv6 adresses in rule\n"
1299                 if $ipversion && ($vers != $ipversion);
1300             $ipversion = $vers;
1301         }
1302     };
1303
1304     my $check_ipset_or_alias_property = sub {
1305         my ($name, $expected_ipversion) = @_;
1306
1307         if (my $value = $rule->{$name}) {
1308             if ($value =~ m/^\+/) {
1309                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1310                     &$add_error($name, "no such ipset '$1'")
1311                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1312
1313                 } else {
1314                     &$add_error($name, "invalid ipset name '$value'");
1315                 }
1316             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1317                 my $alias = lc($value);
1318                 &$add_error($name, "no such alias '$value'")
1319                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1320                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1321                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1322
1323                 &$set_ip_version($e->{ipversion});
1324             }
1325         }
1326     };
1327
1328     my $type = $rule->{type};
1329     my $action = $rule->{action};
1330
1331     &$add_error('type', "missing property") if !$type;
1332     &$add_error('action', "missing property") if !$action;
1333
1334     if ($type) {
1335         if ($type eq  'in' || $type eq 'out') {
1336             &$add_error('action', "unknown action '$action'")
1337                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1338         } elsif ($type eq 'group') {
1339             &$add_error('type', "security groups not allowed")
1340                 if !$allow_groups;
1341             &$add_error('action', "invalid characters in security group name")
1342                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1343         } else {
1344             &$add_error('type', "unknown rule type '$type'");
1345         }
1346     }
1347
1348     if ($rule->{iface}) {
1349         &$add_error('type', "parameter -i not allowed for this rule type")
1350             if !$allow_iface;
1351         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1352         &$add_error('iface', $@) if $@;
1353         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1354             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1355                 if $rule->{iface} !~  m/^net(\d+)$/;
1356         }
1357     }
1358
1359     if ($rule->{macro}) {
1360         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1361             $rule->{macro} = $preferred_name;
1362         } else {
1363             &$add_error('macro', "unknown macro '$rule->{macro}'");
1364         }
1365     }
1366
1367     if ($rule->{proto}) {
1368         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1369         &$add_error('proto', $@) if $@;
1370         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1371         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1372     }
1373
1374     if ($rule->{dport}) {
1375         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1376         &$add_error('dport', $@) if $@;
1377         &$add_error('proto', "missing property - 'dport' requires this property")
1378             if !$rule->{proto};
1379     }
1380
1381     if ($rule->{sport}) {
1382         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1383         &$add_error('sport', $@) if $@;
1384         &$add_error('proto', "missing property - 'sport' requires this property")
1385             if !$rule->{proto};
1386     }
1387
1388     if ($rule->{source}) {
1389         eval {
1390             my $source_ipversion = parse_address_list($rule->{source});
1391             &$set_ip_version($source_ipversion);
1392         };
1393         &$add_error('source', $@) if $@;
1394         &$check_ipset_or_alias_property('source', $ipversion);
1395     }
1396
1397     if ($rule->{dest}) {
1398         eval {
1399             my $dest_ipversion = parse_address_list($rule->{dest});
1400             &$set_ip_version($dest_ipversion);
1401         };
1402         &$add_error('dest', $@) if $@;
1403         &$check_ipset_or_alias_property('dest', $ipversion);
1404     }
1405
1406     $rule->{ipversion} = $ipversion if $ipversion;
1407
1408     if ($rule->{macro} && !$error_count) {
1409         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1410         if (my $err = $@) {
1411             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1412                 my $eh = $err->{errors};
1413                 foreach my $p (keys %$eh) {
1414                     &$add_error($p, $eh->{$p});
1415                 }
1416             } else {
1417                 &$add_error('macro', "$err");
1418             }
1419         }
1420     }
1421
1422     $rule->{errors} = $errors if $error_count;
1423
1424     return $rule;
1425 }
1426
1427 sub copy_rule_data {
1428     my ($rule, $param) = @_;
1429
1430     foreach my $k (keys %$rule_properties) {
1431         if (defined(my $v = $param->{$k})) {
1432             if ($v eq '' || $v eq '-') {
1433                 delete $rule->{$k};
1434             } else {
1435                 $rule->{$k} = $v;
1436             }
1437         }
1438     }
1439
1440     return $rule;
1441 }
1442
1443 sub rules_modify_permissions {
1444     my ($rule_env) = @_;
1445
1446     if ($rule_env eq 'host') {
1447         return {
1448             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1449         };
1450     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1451         return {
1452             check => ['perm', '/', [ 'Sys.Modify' ]],
1453         };
1454     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1455         return {
1456             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1457         }
1458     }
1459
1460     return undef;
1461 }
1462
1463 sub rules_audit_permissions {
1464     my ($rule_env) = @_;
1465
1466     if ($rule_env eq 'host') {
1467         return {
1468             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1469         };
1470     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1471         return {
1472             check => ['perm', '/', [ 'Sys.Audit' ]],
1473         };
1474     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1475         return {
1476             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1477         }
1478     }
1479
1480     return undef;
1481 }
1482
1483 # core functions
1484 my $bridge_firewall_enabled = 0;
1485
1486 sub enable_bridge_firewall {
1487
1488     return if $bridge_firewall_enabled; # only once
1489
1490     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1491     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1492
1493     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1494     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1495
1496     $bridge_firewall_enabled = 1;
1497 }
1498
1499 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1500
1501 sub iptables_restore_cmdlist {
1502     my ($cmdlist) = @_;
1503
1504     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1505 }
1506
1507 sub ip6tables_restore_cmdlist {
1508     my ($cmdlist) = @_;
1509
1510     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1511 }
1512
1513 sub ipset_restore_cmdlist {
1514     my ($cmdlist) = @_;
1515
1516     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1517 }
1518
1519 sub iptables_get_chains {
1520     my ($iptablescmd) = @_;
1521
1522     $iptablescmd = "iptables" if !$iptablescmd;
1523
1524     my $res = {};
1525
1526     # check what chains we want to track
1527     my $is_pvefw_chain = sub {
1528         my $name = shift;
1529
1530         return 1 if $name =~ m/^PVEFW-\S+$/;
1531
1532         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1533
1534         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1535
1536         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1537         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1538
1539         return undef;
1540     };
1541
1542     my $table = '';
1543
1544     my $hooks = {};
1545
1546     my $parser = sub {
1547         my $line = shift;
1548
1549         return if $line =~ m/^#/;
1550         return if $line =~ m/^\s*$/;
1551
1552         if ($line =~ m/^\*(\S+)$/) {
1553             $table = $1;
1554             return;
1555         }
1556
1557         return if $table ne 'filter';
1558
1559         if ($line =~ m/^:(\S+)\s/) {
1560             my $chain = $1;
1561             return if !&$is_pvefw_chain($chain);
1562             $res->{$chain} = "unknown";
1563         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1564             my ($chain, $sig) = ($1, $2);
1565             return if !&$is_pvefw_chain($chain);
1566             $res->{$chain} = $sig;
1567         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1568             $hooks->{$1} = 1;
1569         } else {
1570             # simply ignore the rest
1571             return;
1572         }
1573     };
1574
1575     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1576
1577     return wantarray ? ($res, $hooks) : $res;
1578 }
1579
1580 sub iptables_chain_digest {
1581     my ($rules) = @_;
1582     my $digest = Digest::SHA->new('sha1');
1583     foreach my $rule (@$rules) { # order is important
1584         $digest->add($rule);
1585     }
1586     return $digest->b64digest;
1587 }
1588
1589 sub ipset_chain_digest {
1590     my ($rules) = @_;
1591
1592     my $digest = Digest::SHA->new('sha1');
1593     foreach my $rule (sort @$rules) { # note: sorted
1594         $digest->add($rule);
1595     }
1596     return $digest->b64digest;
1597 }
1598
1599 sub ipset_get_chains {
1600
1601     my $res = {};
1602     my $chains = {};
1603
1604     my $parser = sub {
1605         my $line = shift;
1606
1607         return if $line =~ m/^#/;
1608         return if $line =~ m/^\s*$/;
1609         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1610             my $chain = $1;
1611             $line =~ s/\s+$//; # delete trailing white space
1612             push @{$chains->{$chain}}, $line;
1613         } else {
1614             # simply ignore the rest
1615             return;
1616         }
1617     };
1618
1619     run_command("/sbin/ipset save", outfunc => $parser);
1620
1621     # compute digest for each chain
1622     foreach my $chain (keys %$chains) {
1623         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1624     }
1625
1626     return $res;
1627 }
1628
1629 sub ruleset_generate_cmdstr {
1630     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1631
1632     return if defined($rule->{enable}) && !$rule->{enable};
1633     return if $rule->{errors};
1634
1635     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1636
1637     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1638     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1639
1640     my @cmd = ();
1641
1642     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1643     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1644
1645     my $source = $rule->{source};
1646     my $dest = $rule->{dest};
1647
1648     if ($source) {
1649         if ($source =~ m/^\+/) {
1650             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1651                 my $name = $1;
1652                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1653                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1654                     push @cmd, "-m set --match-set ${ipset_chain} src";
1655                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1656                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1657                     push @cmd, "-m set --match-set ${ipset_chain} src";
1658                 } else {
1659                     die "no such ipset '$name'\n";
1660                 }
1661             } else {
1662                 die "invalid security group name '$source'\n";
1663             }
1664         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1665             my $alias = lc($source);
1666             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1667             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1668             die "no such alias '$source'\n" if !$e;
1669             push @cmd, "-s $e->{cidr}";
1670         } elsif ($source =~ m/\-/){
1671             push @cmd, "-m iprange --src-range $source";
1672         } else {
1673             push @cmd, "-s $source";
1674         }
1675     }
1676
1677     if ($dest) {
1678         if ($dest =~ m/^\+/) {
1679             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1680                 my $name = $1;
1681                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1682                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1683                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1684                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1685                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1686                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1687                 } else {
1688                     die "no such ipset '$name'\n";
1689                 }
1690             } else {
1691                 die "invalid security group name '$dest'\n";
1692             }
1693         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1694             my $alias = lc($dest);
1695             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1696             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1697             die "no such alias '$dest'\n" if !$e;
1698             push @cmd, "-d $e->{cidr}";
1699         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1700             push @cmd, "-m iprange --dst-range $dest";
1701         } else {
1702             push @cmd, "-d $dest";
1703         }
1704     }
1705
1706     if ($rule->{proto}) {
1707         push @cmd, "-p $rule->{proto}";
1708
1709         my $multiport = 0;
1710         $multiport++ if $nbdport > 1;
1711         $multiport++ if $nbsport > 1;
1712
1713         push @cmd, "--match multiport" if $multiport;
1714
1715         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1716             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1717
1718         if ($rule->{dport}) {
1719             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1720                 # Note: we use dport to store --icmp-type
1721                 die "unknown icmp-type '$rule->{dport}'\n"
1722                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1723                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1724             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1725                 # Note: we use dport to store --icmpv6-type
1726                 die "unknown icmpv6-type '$rule->{dport}'\n"
1727                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1728                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1729             } else {
1730                 if ($nbdport > 1) {
1731                     if ($multiport == 2) {
1732                         push @cmd,  "--ports $rule->{dport}";
1733                     } else {
1734                         push @cmd, "--dports $rule->{dport}";
1735                     }
1736                 } else {
1737                     push @cmd, "--dport $rule->{dport}";
1738                 }
1739             }
1740         }
1741
1742         if ($rule->{sport}) {
1743             if ($nbsport > 1) {
1744                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1745             } else {
1746                 push @cmd, "--sport $rule->{sport}";
1747             }
1748         }
1749     } elsif ($rule->{dport} || $rule->{sport}) {
1750         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1751         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1752     }
1753
1754     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1755
1756     if (my $action = $rule->{action}) {
1757         $action = $actions->{$action} if defined($actions->{$action});
1758         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1759         push @cmd, $goto ? "-g $action" : "-j $action";
1760     }
1761
1762     return scalar(@cmd) ? join(' ', @cmd) : undef;
1763 }
1764
1765 sub ruleset_generate_rule {
1766     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1767
1768     my $rules;
1769
1770     if ($rule->{macro}) {
1771         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1772     } else {
1773         $rules = [ $rule ];
1774     }
1775
1776     # update all or nothing
1777
1778     my @cmds = ();
1779     foreach my $tmp (@$rules) {
1780         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1781             push @cmds, $cmdstr;
1782         }
1783     }
1784
1785     foreach my $cmdstr (@cmds) {
1786         ruleset_addrule($ruleset, $chain, $cmdstr);
1787     }
1788 }
1789
1790 sub ruleset_generate_rule_insert {
1791     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1792
1793     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1794
1795     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1796         ruleset_insertrule($ruleset, $chain, $cmdstr);
1797     }
1798 }
1799
1800 sub ruleset_create_chain {
1801     my ($ruleset, $chain) = @_;
1802
1803     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1804     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1805
1806     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1807
1808     $ruleset->{$chain} = [];
1809 }
1810
1811 sub ruleset_chain_exist {
1812     my ($ruleset, $chain) = @_;
1813
1814     return $ruleset->{$chain} ? 1 : undef;
1815 }
1816
1817 sub ruleset_addrule {
1818    my ($ruleset, $chain, $rule) = @_;
1819
1820    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1821
1822    push @{$ruleset->{$chain}}, "-A $chain $rule";
1823 }
1824
1825 sub ruleset_insertrule {
1826    my ($ruleset, $chain, $rule) = @_;
1827
1828    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1829
1830    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1831 }
1832
1833 sub get_log_rule_base {
1834     my ($chain, $vmid, $msg, $loglevel) = @_;
1835
1836     die "internal error - no log level" if !defined($loglevel);
1837
1838     $vmid = 0 if !defined($vmid);
1839
1840     # Note: we use special format for prefix to pass further
1841     # info to log daemon (VMID, LOGVELEL and CHAIN)
1842
1843     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1844 }
1845
1846 sub ruleset_addlog {
1847     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1848
1849     return if !defined($loglevel);
1850
1851     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1852
1853     $logrule = "$rule $logrule" if defined($rule);
1854
1855     ruleset_addrule($ruleset, $chain, $logrule);
1856 }
1857
1858 sub ruleset_add_chain_policy {
1859     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1860
1861     if ($policy eq 'ACCEPT') {
1862
1863         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1864                               { ACCEPT =>  $accept_action});
1865
1866     } elsif ($policy eq 'DROP') {
1867
1868         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1869
1870         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1871
1872         ruleset_addrule($ruleset, $chain, "-j DROP");
1873     } elsif ($policy eq 'REJECT') {
1874         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1875
1876         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1877
1878         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1879     } else {
1880         # should not happen
1881         die "internal error: unknown policy '$policy'";
1882     }
1883 }
1884
1885 sub ruleset_chain_add_ndp {
1886     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
1887     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1888
1889     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
1890     if ($direction ne 'OUT' || $options->{radv}) {
1891         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
1892     }
1893     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
1894     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
1895 }
1896
1897 sub ruleset_chain_add_conn_filters {
1898     my ($ruleset, $chain, $accept) = @_;
1899
1900     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1901     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1902 }
1903
1904 sub ruleset_chain_add_input_filters {
1905     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1906
1907     if ($cluster_conf->{ipset}->{blacklist}){
1908         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1909             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1910             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1911             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1912         }
1913         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1914         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1915     }
1916
1917     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1918         if ($ipversion == 4) {
1919             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1920         }
1921     }
1922
1923     if ($options->{tcpflags}) {
1924         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1925     }
1926 }
1927
1928 sub ruleset_create_vm_chain {
1929     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1930
1931     ruleset_create_chain($ruleset, $chain);
1932     my $accept = generate_nfqueue($options);
1933
1934     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1935         if ($ipversion == 4) {
1936             if ($direction eq 'OUT') {
1937                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1938                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1939                                         proto => 'udp', sport => 68, dport => 67 });
1940             } else {
1941                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1942                                       { action => 'ACCEPT',
1943                                         proto => 'udp', sport => 67, dport => 68 });
1944             }
1945         } elsif ($ipversion == 6) {
1946             if ($direction eq 'OUT') {
1947                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1948                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1949                                         proto => 'udp', sport => 546, dport => 547 });
1950             } else {
1951                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1952                                       { action => 'ACCEPT',
1953                                         proto => 'udp', sport => 547, dport => 546 });
1954             }
1955         }
1956
1957     }
1958
1959     if ($direction eq 'OUT') {
1960         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1961             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1962         }
1963         if ($ipversion == 6 && !$options->{radv}) {
1964             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1965         }
1966         if ($ipfilter_ipset) {
1967             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1968         }
1969         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1970     }
1971
1972     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
1973     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
1974 }
1975
1976 sub ruleset_add_group_rule {
1977     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1978
1979     my $group = $rule->{action};
1980     my $group_chain = "GROUP-$group-$direction";
1981     if(!ruleset_chain_exist($ruleset, $group_chain)){
1982         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1983     }
1984
1985     if ($direction eq 'OUT' && $rule->{iface_out}) {
1986         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1987     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1988         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1989     } else {
1990         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1991     }
1992
1993     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1994 }
1995
1996 sub ruleset_generate_vm_rules {
1997     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1998
1999     my $lc_direction = lc($direction);
2000
2001     my $in_accept = generate_nfqueue($options);
2002
2003     foreach my $rule (@$rules) {
2004         next if $rule->{iface} && $rule->{iface} ne $netid;
2005         next if !$rule->{enable} || $rule->{errors};
2006         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2007
2008         if ($rule->{type} eq 'group') {
2009             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2010                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2011         } else {
2012             next if $rule->{type} ne $lc_direction;
2013             eval {
2014                 if ($direction eq 'OUT') {
2015                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2016                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2017                                           undef, $cluster_conf, $vmfw_conf);
2018                 } else {
2019                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2020                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2021                                           undef, $cluster_conf, $vmfw_conf);
2022                 }
2023             };
2024             warn $@ if $@;
2025         }
2026     }
2027 }
2028
2029 sub generate_nfqueue {
2030     my ($options) = @_;
2031
2032     if ($options->{ips}) {
2033         my $action = "NFQUEUE";
2034         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2035             if (defined($3) && defined($1)) {
2036                 $action .= " --queue-balance $1:$3";
2037             } elsif (defined($1)) {
2038                 $action .= " --queue-num $1";
2039             }
2040         }
2041         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2042         return $action;
2043     } else {
2044         return "ACCEPT";
2045     }
2046 }
2047
2048 sub ruleset_generate_vm_ipsrules {
2049     my ($ruleset, $options, $direction, $iface) = @_;
2050
2051     if ($options->{ips} && $direction eq 'IN') {
2052         my $nfqueue = generate_nfqueue($options);
2053
2054         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2055             ruleset_create_chain($ruleset, "PVEFW-IPS");
2056         }
2057
2058         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2059     }
2060 }
2061
2062 sub generate_tap_rules_direction {
2063     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2064
2065     my $lc_direction = lc($direction);
2066
2067     my $rules = $vmfw_conf->{rules};
2068
2069     my $options = $vmfw_conf->{options};
2070     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2071
2072     my $tapchain = "$iface-$direction";
2073
2074     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2075     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2076         if $vmfw_conf->{ipset}->{$ipfilter_name};
2077
2078     # create chain with mac and ip filter
2079     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2080
2081     if ($options->{enable}) {
2082         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2083
2084         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2085
2086         # implement policy
2087         my $policy;
2088
2089         if ($direction eq 'OUT') {
2090             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2091         } else {
2092         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2093         }
2094
2095         my $accept = generate_nfqueue($options);
2096         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2097         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2098     } else {
2099         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2100         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2101     }
2102
2103     # plug the tap chain to bridge chain
2104     if ($direction eq 'IN') {
2105         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2106                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2107     } else {
2108         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2109                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2110     }
2111 }
2112
2113 sub enable_host_firewall {
2114     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2115
2116     my $options = $hostfw_conf->{options};
2117     my $cluster_options = $cluster_conf->{options};
2118     my $rules = $hostfw_conf->{rules};
2119     my $cluster_rules = $cluster_conf->{rules};
2120
2121     # host inbound firewall
2122     my $chain = "PVEFW-HOST-IN";
2123     ruleset_create_chain($ruleset, $chain);
2124
2125     my $loglevel = get_option_log_level($options, "log_level_in");
2126
2127     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2128
2129     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2130     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2131     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2132
2133     # we use RETURN because we need to check also tap rules
2134     my $accept_action = 'RETURN';
2135
2136     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2137
2138     # add host rules first, so that cluster wide rules can be overwritten
2139     foreach my $rule (@$rules, @$cluster_rules) {
2140         next if !$rule->{enable} || $rule->{errors};
2141         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2142
2143         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2144
2145         eval {
2146             if ($rule->{type} eq 'group') {
2147                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2148             } elsif ($rule->{type} eq 'in') {
2149                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2150                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2151                                       undef, $cluster_conf, $hostfw_conf);
2152             }
2153         };
2154         warn $@ if $@;
2155         delete $rule->{iface_in};
2156     }
2157
2158     # allow standard traffic for management ipset (includes cluster network)
2159     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2160     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2161     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2162     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2163     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2164     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2165
2166     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2167     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2168
2169     # corosync
2170     if ($localnet && ($ipversion == $localnet_ver)) {
2171         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2172         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2173         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2174     }
2175
2176     # implement input policy
2177     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2178     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2179
2180     # host outbound firewall
2181     $chain = "PVEFW-HOST-OUT";
2182     ruleset_create_chain($ruleset, $chain);
2183
2184     $loglevel = get_option_log_level($options, "log_level_out");
2185
2186     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2187
2188     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2189
2190     # we use RETURN because we may want to check other thigs later
2191     $accept_action = 'RETURN';
2192     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2193
2194     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2195
2196     # add host rules first, so that cluster wide rules can be overwritten
2197     foreach my $rule (@$rules, @$cluster_rules) {
2198         next if !$rule->{enable} || $rule->{errors};
2199         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2200
2201         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2202         eval {
2203             if ($rule->{type} eq 'group') {
2204                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2205             } elsif ($rule->{type} eq 'out') {
2206                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2207                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2208                                       undef, $cluster_conf, $hostfw_conf);
2209             }
2210         };
2211         warn $@ if $@;
2212         delete $rule->{iface_out};
2213     }
2214
2215     # allow standard traffic on cluster network
2216     if ($localnet && ($ipversion == $localnet_ver)) {
2217         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2218         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2219         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2220         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2221
2222         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2223         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2224         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2225     }
2226
2227     # implement output policy
2228     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2229     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2230
2231     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2232     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2233 }
2234
2235 sub generate_group_rules {
2236     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2237
2238     my $rules = $cluster_conf->{groups}->{$group};
2239
2240     if (!$rules) {
2241         warn "no such security group '$group'\n";
2242         $rules = []; # create empty chain
2243     }
2244
2245     my $chain = "GROUP-${group}-IN";
2246
2247     ruleset_create_chain($ruleset, $chain);
2248     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2249
2250     foreach my $rule (@$rules) {
2251         next if $rule->{type} ne 'in';
2252         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2253         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2254                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2255                               undef, $cluster_conf);
2256     }
2257
2258     $chain = "GROUP-${group}-OUT";
2259
2260     ruleset_create_chain($ruleset, $chain);
2261     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2262
2263     foreach my $rule (@$rules) {
2264         next if $rule->{type} ne 'out';
2265         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2266         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2267         # check also other tap rules later
2268         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2269                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2270                               undef, $cluster_conf);
2271     }
2272 }
2273
2274 my $MAX_NETS = 32;
2275 my $valid_netdev_names = {};
2276 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2277     $valid_netdev_names->{"net$i"} = 1;
2278 }
2279
2280 sub parse_fw_rule {
2281     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2282
2283     my $orig_line = $line;
2284
2285     my $rule = {};
2286
2287     # we can add single line comments to the end of the rule
2288     if ($line =~ s/#\s*(.*?)\s*$//) {
2289         $rule->{comment} = decode('utf8', $1);
2290     }
2291
2292     # we can disable a rule when prefixed with '|'
2293
2294     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2295
2296     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2297         die "unable to parse rule: $line\n";
2298
2299     $rule->{type} = lc($1);
2300     $rule->{action} = $2;
2301
2302     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2303         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2304             $rule->{macro} = $1;
2305             $rule->{action} = $2;
2306         }
2307     }
2308
2309     while (length($line)) {
2310         if ($line =~ s/^-i (\S+)\s*//) {
2311             $rule->{iface} = $1;
2312             next;
2313         }
2314
2315         last if $rule->{type} eq 'group';
2316
2317         if ($line =~ s/^-p (\S+)\s*//) {
2318             $rule->{proto} = $1;
2319             next;
2320         }
2321
2322         if ($line =~ s/^-dport (\S+)\s*//) {
2323             $rule->{dport} = $1;
2324             next;
2325         }
2326
2327         if ($line =~ s/^-sport (\S+)\s*//) {
2328             $rule->{sport} = $1;
2329             next;
2330         }
2331         if ($line =~ s/^-source (\S+)\s*//) {
2332             $rule->{source} = $1;
2333             next;
2334         }
2335         if ($line =~ s/^-dest (\S+)\s*//) {
2336             $rule->{dest} = $1;
2337             next;
2338         }
2339
2340         last;
2341     }
2342
2343     die "unable to parse rule parameters: $line\n" if length($line);
2344
2345     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2346     if ($verbose && $rule->{errors}) {
2347         warn "$prefix - errors in rule parameters: $orig_line\n";
2348         foreach my $p (keys %{$rule->{errors}}) {
2349             warn "  $p: $rule->{errors}->{$p}\n";
2350         }
2351     }
2352
2353     return $rule;
2354 }
2355
2356 sub parse_vmfw_option {
2357     my ($line) = @_;
2358
2359     my ($opt, $value);
2360
2361     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2362
2363     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ips):\s*(0|1)\s*$/i) {
2364         $opt = lc($1);
2365         $value = int($2);
2366     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2367         $opt = lc($1);
2368         $value = $2 ? lc($3) : '';
2369     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2370         $opt = lc($1);
2371         $value = uc($3);
2372     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2373         $opt = lc($1);
2374         $value = $2;
2375     } else {
2376         die "can't parse option '$line'\n"
2377     }
2378
2379     return ($opt, $value);
2380 }
2381
2382 sub parse_hostfw_option {
2383     my ($line) = @_;
2384
2385     my ($opt, $value);
2386
2387     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2388
2389     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2390         $opt = lc($1);
2391         $value = int($2);
2392     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2393         $opt = lc($1);
2394         $value = $2 ? lc($3) : '';
2395     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2396         $opt = lc($1);
2397         $value = int($2);
2398     } else {
2399         die "can't parse option '$line'\n"
2400     }
2401
2402     return ($opt, $value);
2403 }
2404
2405 sub parse_clusterfw_option {
2406     my ($line) = @_;
2407
2408     my ($opt, $value);
2409
2410     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2411         $opt = lc($1);
2412         $value = int($2);
2413         if (($value > 1) && ((time() - $value) > 60)) {
2414             $value = 0
2415         }
2416     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2417         $opt = lc($1);
2418         $value = uc($3);
2419     } else {
2420         die "can't parse option '$line'\n"
2421     }
2422
2423     return ($opt, $value);
2424 }
2425
2426 sub resolve_alias {
2427     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2428
2429     my $alias = lc($cidr);
2430     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2431     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2432
2433     die "no such alias '$cidr'\n" if !$e;;
2434
2435     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2436 }
2437
2438 sub parse_ip_or_cidr {
2439     my ($cidr) = @_;
2440
2441     my $ipversion;
2442
2443     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2444         $cidr =~ s|/128$||;
2445         $ipversion = 6;
2446     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2447         $cidr =~ s|/32$||;
2448         $ipversion = 4;
2449     } else {
2450         die "value does not look like a valid IP address or CIDR network\n";
2451     }
2452
2453     return wantarray ? ($cidr, $ipversion) : $cidr;
2454 }
2455
2456 sub parse_alias {
2457     my ($line) = @_;
2458
2459     # we can add single line comments to the end of the line
2460     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2461
2462     if ($line =~ m/^(\S+)\s(\S+)$/) {
2463         my ($name, $cidr) = ($1, $2);
2464         my $ipversion;
2465
2466         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2467
2468         my $data = {
2469             name => $name,
2470             cidr => $cidr,
2471             ipversion => $ipversion,
2472         };
2473         $data->{comment} = $comment  if $comment;
2474         return $data;
2475     }
2476
2477     return undef;
2478 }
2479
2480 sub generic_fw_config_parser {
2481     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2482
2483     my $section;
2484     my $group;
2485
2486     my $res = $empty_conf;
2487
2488     while (defined(my $line = <$fh>)) {
2489         next if $line =~ m/^#/;
2490         next if $line =~ m/^\s*$/;
2491
2492         chomp $line;
2493
2494         my $linenr = $fh->input_line_number();
2495         my $prefix = "$filename (line $linenr)";
2496
2497         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2498             $section = 'options';
2499             next;
2500         }
2501
2502         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2503             $section = 'aliases';
2504             next;
2505         }
2506
2507         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2508             $section = 'groups';
2509             $group = lc($1);
2510             my $comment = $2;
2511             eval {
2512                 die "security group name too long\n" if length($group) > $max_group_name_length;
2513                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2514             };
2515             if (my $err = $@) {
2516                 ($section, $group, $comment) = undef;
2517                 warn "$prefix: $err";
2518                 next;
2519             }
2520
2521             $res->{$section}->{$group} = [];
2522             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2523                 if $comment;
2524             next;
2525         }
2526
2527         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2528             $section = 'rules';
2529             next;
2530         }
2531
2532         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2533             $section = 'ipset';
2534             $group = lc($1);
2535             my $comment = $2;
2536             eval {
2537                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2538                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2539             };
2540             if (my $err = $@) {
2541                 ($section, $group, $comment) = undef;
2542                 warn "$prefix: $err";
2543                 next;
2544             }
2545
2546             $res->{$section}->{$group} = [];
2547             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2548                 if $comment;
2549             next;
2550         }
2551
2552         if (!$section) {
2553             warn "$prefix: skip line - no section\n";
2554             next;
2555         }
2556
2557         if ($section eq 'options') {
2558             eval {
2559                 my ($opt, $value);
2560                 if ($rule_env eq 'cluster') {
2561                     ($opt, $value) = parse_clusterfw_option($line);
2562                 } elsif ($rule_env eq 'host') {
2563                     ($opt, $value) = parse_hostfw_option($line);
2564                 } else {
2565                     ($opt, $value) = parse_vmfw_option($line);
2566                 }
2567                 $res->{options}->{$opt} = $value;
2568             };
2569             warn "$prefix: $@" if $@;
2570         } elsif ($section eq 'aliases') {
2571             eval {
2572                 my $data = parse_alias($line);
2573                 $res->{aliases}->{lc($data->{name})} = $data;
2574             };
2575             warn "$prefix: $@" if $@;
2576         } elsif ($section eq 'rules') {
2577             my $rule;
2578             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2579             if (my $err = $@) {
2580                 warn "$prefix: $err";
2581                 next;
2582             }
2583             push @{$res->{$section}}, $rule;
2584         } elsif ($section eq 'groups') {
2585             my $rule;
2586             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2587             if (my $err = $@) {
2588                 warn "$prefix: $err";
2589                 next;
2590             }
2591             push @{$res->{$section}->{$group}}, $rule;
2592         } elsif ($section eq 'ipset') {
2593             # we can add single line comments to the end of the rule
2594             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2595
2596             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2597             my $nomatch = $1;
2598             my $cidr = $2;
2599             my $errors;
2600
2601             if ($nomatch && !$feature_ipset_nomatch) {
2602                 $errors->{nomatch} = "nomatch not supported by kernel";
2603             }
2604
2605             eval {
2606                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2607                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2608                 } else {
2609                     $cidr = parse_ip_or_cidr($cidr);
2610                 }
2611             };
2612             if (my $err = $@) {
2613                 chomp $err;
2614                 $errors->{cidr} = $err;
2615             }
2616
2617             my $entry = { cidr => $cidr };
2618             $entry->{nomatch} = 1 if $nomatch;
2619             $entry->{comment} = $comment if $comment;
2620             $entry->{errors} =  $errors if $errors;
2621
2622             if ($verbose && $errors) {
2623                 warn "$prefix - errors in ipset '$group': $line\n";
2624                 foreach my $p (keys %{$errors}) {
2625                     warn "  $p: $errors->{$p}\n";
2626                 }
2627             }
2628
2629             push @{$res->{$section}->{$group}}, $entry;
2630         } else {
2631             warn "$prefix: skip line - unknown section\n";
2632             next;
2633         }
2634     }
2635
2636     return $res;
2637 }
2638
2639 sub parse_hostfw_config {
2640     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2641
2642     my $empty_conf = { rules => [], options => {}};
2643
2644     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2645 }
2646
2647 sub parse_vmfw_config {
2648     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2649
2650     my $empty_conf = {
2651         rules => [],
2652         options => {},
2653         aliases => {},
2654         ipset => {} ,
2655         ipset_comments => {},
2656     };
2657
2658     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2659 }
2660
2661 sub parse_clusterfw_config {
2662     my ($filename, $fh, $verbose) = @_;
2663
2664     my $section;
2665     my $group;
2666
2667     my $empty_conf = {
2668         rules => [],
2669         options => {},
2670         aliases => {},
2671         groups => {},
2672         group_comments => {},
2673         ipset => {} ,
2674         ipset_comments => {},
2675     };
2676
2677     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2678 }
2679
2680 sub run_locked {
2681     my ($code, @param) = @_;
2682
2683     my $timeout = 10;
2684
2685     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2686
2687     die $@ if $@;
2688
2689     return $res;
2690 }
2691
2692 sub read_local_vm_config {
2693
2694     my $qemu = {};
2695     my $lxc = {};
2696
2697     my $vmdata = { qemu => $qemu, lxc => $lxc };
2698
2699     my $vmlist = PVE::Cluster::get_vmlist();
2700     return $vmdata if !$vmlist || !$vmlist->{ids};
2701     my $ids = $vmlist->{ids};
2702
2703     foreach my $vmid (keys %$ids) {
2704         next if !$vmid; # skip VE0
2705         my $d = $ids->{$vmid};
2706         next if !$d->{node} || $d->{node} ne $nodename;
2707         next if !$d->{type};
2708         if ($d->{type} eq 'qemu') {
2709             if ($have_qemu_server) {
2710                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2711                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2712                     $qemu->{$vmid} = $conf;
2713                 }
2714             }
2715         } elsif ($d->{type} eq 'lxc') {
2716             if ($have_lxc) {
2717                 my $cfspath = PVE::LXC::cfs_config_path($vmid);
2718                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2719                     $lxc->{$vmid} = $conf;
2720                 }
2721             }
2722         }
2723     }
2724
2725     return $vmdata;
2726 };
2727
2728 sub load_vmfw_conf {
2729     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2730
2731     my $vmfw_conf = {};
2732
2733     $dir = $pvefw_conf_dir if !defined($dir);
2734
2735     my $filename = "$dir/$vmid.fw";
2736     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2737         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2738         $vmfw_conf->{vmid} = $vmid;
2739     }
2740
2741     return $vmfw_conf;
2742 }
2743
2744 my $format_rules = sub {
2745     my ($rules, $allow_iface) = @_;
2746
2747     my $raw = '';
2748
2749     foreach my $rule (@$rules) {
2750         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2751             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2752             $raw .= uc($rule->{type});
2753             if ($rule->{macro}) {
2754                 $raw .= " $rule->{macro}($rule->{action})";
2755             } else {
2756                 $raw .= " " . $rule->{action};
2757             }
2758             if ($allow_iface && $rule->{iface}) {
2759                 $raw .= " -i $rule->{iface}";
2760             }
2761
2762             if ($rule->{type} ne  'group')  {
2763                 $raw .= " -source $rule->{source}" if $rule->{source};
2764                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2765                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2766                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2767                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2768             }
2769
2770             $raw .= " # " . encode('utf8', $rule->{comment})
2771                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2772             $raw .= "\n";
2773         } else {
2774             die "unknown rule type '$rule->{type}'";
2775         }
2776     }
2777
2778     return $raw;
2779 };
2780
2781 my $format_options = sub {
2782     my ($options) = @_;
2783
2784     my $raw = '';
2785
2786     $raw .= "[OPTIONS]\n\n";
2787     foreach my $opt (keys %$options) {
2788         $raw .= "$opt: $options->{$opt}\n";
2789     }
2790     $raw .= "\n";
2791
2792     return $raw;
2793 };
2794
2795 my $format_aliases = sub {
2796     my ($aliases) = @_;
2797
2798     my $raw = '';
2799
2800     $raw .= "[ALIASES]\n\n";
2801     foreach my $k (keys %$aliases) {
2802         my $e = $aliases->{$k};
2803         $raw .= "$e->{name} $e->{cidr}";
2804         $raw .= " # " . encode('utf8', $e->{comment})
2805             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2806         $raw .= "\n";
2807     }
2808     $raw .= "\n";
2809
2810     return $raw;
2811 };
2812
2813 my $format_ipsets = sub {
2814     my ($fw_conf) = @_;
2815
2816     my $raw = '';
2817
2818     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2819         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2820             my $utf8comment = encode('utf8', $comment);
2821             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2822         } else {
2823             $raw .= "[IPSET $ipset]\n\n";
2824         }
2825         my $options = $fw_conf->{ipset}->{$ipset};
2826
2827         my $nethash = {};
2828         foreach my $entry (@$options) {
2829             $nethash->{$entry->{cidr}} = $entry;
2830         }
2831
2832         foreach my $cidr (sort keys %$nethash) {
2833             my $entry = $nethash->{$cidr};
2834             my $line = $entry->{nomatch} ? '!' : '';
2835             $line .= $entry->{cidr};
2836             $line .= " # " . encode('utf8', $entry->{comment})
2837                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2838             $raw .= "$line\n";
2839         }
2840
2841         $raw .= "\n";
2842     }
2843
2844     return $raw;
2845 };
2846
2847 sub save_vmfw_conf {
2848     my ($vmid, $vmfw_conf) = @_;
2849
2850     my $raw = '';
2851
2852     my $options = $vmfw_conf->{options};
2853     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2854
2855     my $aliases = $vmfw_conf->{aliases};
2856     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2857
2858     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2859
2860     my $rules = $vmfw_conf->{rules} || [];
2861     if ($rules && scalar(@$rules)) {
2862         $raw .= "[RULES]\n\n";
2863         $raw .= &$format_rules($rules, 1);
2864         $raw .= "\n";
2865     }
2866
2867     my $filename = "$pvefw_conf_dir/$vmid.fw";
2868     if ($raw) {
2869         mkdir $pvefw_conf_dir;
2870         PVE::Tools::file_set_contents($filename, $raw);
2871     } else {
2872         unlink $filename;
2873     }
2874 }
2875
2876 sub remove_vmfw_conf {
2877     my ($vmid) = @_;
2878
2879     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
2880
2881     unlink $vmfw_conffile;
2882 }
2883
2884 sub clone_vmfw_conf {
2885     my ($vmid, $newid) = @_;
2886
2887     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
2888     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
2889
2890     if (-f $clonevm_conffile) {
2891         unlink $clonevm_conffile;
2892     }
2893     if (-f $sourcevm_conffile) {
2894         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
2895         PVE::Tools::file_set_contents($clonevm_conffile, $data);
2896     }
2897 }
2898
2899 sub read_vm_firewall_configs {
2900     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2901
2902     my $vmfw_configs = {};
2903
2904     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2905         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2906         next if !$vmfw_conf->{options}; # skip if file does not exists
2907         $vmfw_configs->{$vmid} = $vmfw_conf;
2908     }
2909     foreach my $vmid (keys %{$vmdata->{lxc}}) {
2910         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2911         next if !$vmfw_conf->{options}; # skip if file does not exists
2912         $vmfw_configs->{$vmid} = $vmfw_conf;
2913     }
2914
2915     return $vmfw_configs;
2916 }
2917
2918 sub get_option_log_level {
2919     my ($options, $k) = @_;
2920
2921     my $v = $options->{$k};
2922     $v = $default_log_level if !defined($v);
2923
2924     return undef if $v eq '' || $v eq 'nolog';
2925
2926     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2927
2928     return $v if ($v >= 0) && ($v <= 7);
2929
2930     warn "unknown log level ($k = '$v')\n";
2931
2932     return undef;
2933 }
2934
2935 sub generate_std_chains {
2936     my ($ruleset, $options, $ipversion) = @_;
2937
2938     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2939
2940     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2941
2942     my $chain;
2943
2944     if ($ipversion == 4) {
2945         # same as shorewall smurflog.
2946         $chain = 'PVEFW-smurflog';
2947         $std_chains->{$chain} = [];
2948
2949         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2950         push @{$std_chains->{$chain}}, "-j DROP";
2951     }
2952
2953     # same as shorewall logflags action.
2954     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2955     $chain = 'PVEFW-logflags';
2956     $std_chains->{$chain} = [];
2957
2958     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2959     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2960     push @{$std_chains->{$chain}}, "-j DROP";
2961
2962     foreach my $chain (keys %$std_chains) {
2963         ruleset_create_chain($ruleset, $chain);
2964         foreach my $rule (@{$std_chains->{$chain}}) {
2965             if (ref($rule)) {
2966                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2967             } else {
2968                 ruleset_addrule($ruleset, $chain, $rule);
2969             }
2970         }
2971     }
2972 }
2973
2974 sub generate_ipset_chains {
2975     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips) = @_; #fixme
2976
2977     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2978
2979         my $options = $fw_conf->{ipset}->{$ipset};
2980
2981         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
2982             if (my $ips = $device_ips->{$1}) {
2983                 $options = [@$options, @$ips];
2984             }
2985         }
2986
2987         # remove duplicates
2988         my $nethash = {};
2989         foreach my $entry (@$options) {
2990             next if $entry->{errors}; # skip entries with errors
2991             eval {
2992                 my ($cidr, $ver);
2993                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2994                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2995                 } else {
2996                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2997                 }
2998                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2999                 if ($ver == 6) {
3000                     $cidr = lc(Net::IP::ip_compress_address($cidr, 6));
3001                     $cidr =~ s|/128$||;
3002                 } else {
3003                     $cidr =~ s|/32$||;
3004                 }
3005
3006                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3007             };
3008             warn $@ if $@;
3009         }
3010
3011         foreach my $ipversion (4, 6) {
3012             my $data = $nethash->{$ipversion};
3013
3014             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3015
3016             my $hashsize = scalar(@$options);
3017             if ($hashsize <= 64) {
3018                 $hashsize = 64;
3019             } else {
3020                 $hashsize = round_powerof2($hashsize);
3021             }
3022
3023             my $family = $ipversion == "6" ? "inet6" : "inet";
3024
3025             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3026
3027             foreach my $cidr (sort keys %$data) {
3028                 my $entry = $data->{$cidr};
3029
3030                 my $cmd = "add $name $cidr";
3031                 if ($entry->{nomatch}) {
3032                     if ($feature_ipset_nomatch) {
3033                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3034                     } else {
3035                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3036                     }
3037                 } else {
3038                     push @{$ipset_ruleset->{$name}}, $cmd;
3039                 }
3040             }
3041         }
3042     }
3043 }
3044
3045 sub round_powerof2 {
3046     my ($int) = @_;
3047
3048     $int--;
3049     $int |= $int >> $_ foreach (1,2,4,8,16);
3050     return ++$int;
3051 }
3052
3053 sub load_clusterfw_conf {
3054     my ($filename, $verbose) = @_;
3055
3056     $filename = $clusterfw_conf_filename if !defined($filename);
3057
3058     my $cluster_conf = {};
3059     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3060         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3061     }
3062
3063     return $cluster_conf;
3064 }
3065
3066 sub save_clusterfw_conf {
3067     my ($cluster_conf) = @_;
3068
3069     my $raw = '';
3070
3071     my $options = $cluster_conf->{options};
3072     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3073
3074     my $aliases = $cluster_conf->{aliases};
3075     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3076
3077     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3078
3079     my $rules = $cluster_conf->{rules};
3080     if ($rules && scalar(@$rules)) {
3081         $raw .= "[RULES]\n\n";
3082         $raw .= &$format_rules($rules, 1);
3083         $raw .= "\n";
3084     }
3085
3086     if ($cluster_conf->{groups}) {
3087         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3088             my $rules = $cluster_conf->{groups}->{$group};
3089             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3090                 my $utf8comment = encode('utf8', $comment);
3091                 $raw .= "[group $group] # $utf8comment\n\n";
3092             } else {
3093                 $raw .= "[group $group]\n\n";
3094             }
3095
3096             $raw .= &$format_rules($rules, 0);
3097             $raw .= "\n";
3098         }
3099     }
3100
3101     if ($raw) {
3102         mkdir $pvefw_conf_dir;
3103         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3104     } else {
3105         unlink $clusterfw_conf_filename;
3106     }
3107 }
3108
3109 sub load_hostfw_conf {
3110     my ($cluster_conf, $filename, $verbose) = @_;
3111
3112     $filename = $hostfw_conf_filename if !defined($filename);
3113
3114     my $hostfw_conf = {};
3115     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3116         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3117     }
3118     return $hostfw_conf;
3119 }
3120
3121 sub save_hostfw_conf {
3122     my ($hostfw_conf) = @_;
3123
3124     my $raw = '';
3125
3126     my $options = $hostfw_conf->{options};
3127     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3128
3129     my $rules = $hostfw_conf->{rules};
3130     if ($rules && scalar(@$rules)) {
3131         $raw .= "[RULES]\n\n";
3132         $raw .= &$format_rules($rules, 1);
3133         $raw .= "\n";
3134     }
3135
3136     if ($raw) {
3137         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3138     } else {
3139         unlink $hostfw_conf_filename;
3140     }
3141 }
3142
3143 sub compile {
3144     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3145
3146     my $vmfw_configs;
3147
3148     if ($vmdata) { # test mode
3149         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3150         my $filename = "$testdir/cluster.fw";
3151         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3152
3153         $filename = "$testdir/host.fw";
3154         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3155
3156         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3157     } else { # normal operation
3158         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3159
3160         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3161
3162         $vmdata = read_local_vm_config();
3163         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3164     }
3165
3166     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3167
3168     my $localnet;
3169     if ($cluster_conf->{aliases}->{local_network}) {
3170         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3171     } else {
3172         my $localnet_ver;
3173         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3174
3175         $cluster_conf->{aliases}->{local_network} = {
3176             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3177     }
3178
3179     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3180
3181     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3182     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3183     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3184
3185     return ($ruleset, $ipset_ruleset, $rulesetv6);
3186 }
3187
3188 sub compile_iptables_filter {
3189     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3190
3191     my $ruleset = {};
3192
3193     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3194     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3195
3196     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3197
3198     my $hostfw_options = $hostfw_conf->{options} || {};
3199
3200     # fixme: what log level should we use here?
3201     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3202
3203     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3204
3205     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3206     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3207
3208     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3209
3210     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3211     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3212
3213     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3214
3215     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3216
3217     if ($hostfw_enable) {
3218         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3219         warn $@ if $@; # just to be sure - should not happen
3220     }
3221
3222     # generate firewall rules for QEMU VMs
3223     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3224         eval {
3225             my $conf = $vmdata->{qemu}->{$vmid};
3226             my $vmfw_conf = $vmfw_configs->{$vmid};
3227             return if !$vmfw_conf;
3228
3229             foreach my $netid (keys %$conf) {
3230                 next if $netid !~ m/^net(\d+)$/;
3231                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3232                 next if !$net->{firewall};
3233                 my $iface = "tap${vmid}i$1";
3234
3235                 my $macaddr = $net->{macaddr};
3236                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3237                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3238                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3239                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3240             }
3241         };
3242         warn $@ if $@; # just to be sure - should not happen
3243     }
3244
3245     # generate firewall rules for LXC containers
3246     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3247         eval {
3248             my $conf = $vmdata->{lxc}->{$vmid};
3249             my $vmfw_conf = $vmfw_configs->{$vmid};
3250             return if !$vmfw_conf;
3251
3252             if ($vmfw_conf->{options}->{enable}) {
3253                 foreach my $netid (keys %$conf) {
3254                     next if $netid !~ m/^net(\d+)$/;
3255                     my $net = PVE::LXC::parse_lxc_network($conf->{$netid});
3256                     next if !$net->{firewall};
3257                     my $iface = "veth${vmid}i$1";
3258                     my $macaddr = $net->{hwaddr};
3259                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3260                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3261                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3262                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3263                 }
3264             }
3265         };
3266         warn $@ if $@; # just to be sure - should not happen
3267     }
3268
3269     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3270         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3271     }
3272
3273     return $ruleset;
3274 }
3275
3276 sub mac_to_linklocal {
3277     my ($macaddr) = @_;
3278     my @parts = split(/:/, $macaddr);
3279     # The standard link local address uses the fe80::/64 prefix with the
3280     # modified EUI-64 identifier derived from the MAC address by flipping the
3281     # universal/local bit and inserting FF:FE in the middle.
3282     # See RFC 4291.
3283     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3284     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3285     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3286 }
3287
3288 sub compile_ipsets {
3289     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3290
3291     my $localnet;
3292     if ($cluster_conf->{aliases}->{local_network}) {
3293         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3294     } else {
3295         my $localnet_ver;
3296         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3297
3298         $cluster_conf->{aliases}->{local_network} = {
3299             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3300     }
3301
3302     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3303
3304
3305     my $ipset_ruleset = {};
3306
3307     # generate ipsets for QEMU VMs
3308     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3309         eval {
3310             my $conf = $vmdata->{qemu}->{$vmid};
3311             my $vmfw_conf = $vmfw_configs->{$vmid};
3312             return if !$vmfw_conf;
3313
3314             my $device_ips = {};
3315             foreach my $netid (keys %$conf) {
3316                 next if $netid !~ m/^net(\d+)$/;
3317                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3318                 next if !$net->{firewall};
3319
3320                 my $macaddr = $net->{macaddr};
3321                 my $linklocal = mac_to_linklocal($macaddr);
3322                 $device_ips->{$netid} = [
3323                     { cidr => $linklocal },
3324                     { cidr => 'fe80::/10', nomatch => 1 }
3325                 ];
3326             }
3327
3328             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips);
3329         };
3330         warn $@ if $@; # just to be sure - should not happen
3331     }
3332
3333     # generate firewall rules for LXC containers
3334     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3335         eval {
3336             my $conf = $vmdata->{lxc}->{$vmid};
3337             my $vmfw_conf = $vmfw_configs->{$vmid};
3338             return if !$vmfw_conf;
3339
3340             my $device_ips = {};
3341             foreach my $netid (keys %$conf) {
3342                 next if $netid !~ m/^net(\d+)$/;
3343                 my $net = PVE::LXC::parse_lxc_network($conf->{$netid});
3344                 next if !$net->{firewall};
3345
3346                 my $macaddr = $net->{hwaddr};
3347                 my $linklocal = mac_to_linklocal($macaddr);
3348                 $device_ips->{$netid} = [
3349                     { cidr => $linklocal },
3350                     { cidr => 'fe80::/10', nomatch => 1 }
3351                 ];
3352             }
3353
3354             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips);
3355         };
3356         warn $@ if $@; # just to be sure - should not happen
3357     }
3358
3359     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef);
3360
3361     return $ipset_ruleset;
3362 }
3363
3364 sub get_ruleset_status {
3365     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3366
3367     my $statushash = {};
3368
3369     foreach my $chain (sort keys %$ruleset) {
3370         my $sig = &$digest_fn($ruleset->{$chain});
3371
3372         $statushash->{$chain}->{sig} = $sig;
3373
3374         my $oldsig = $active_chains->{$chain};
3375         if (!defined($oldsig)) {
3376             $statushash->{$chain}->{action} = 'create';
3377         } else {
3378             if ($oldsig eq $sig) {
3379                 $statushash->{$chain}->{action} = 'exists';
3380             } else {
3381                 $statushash->{$chain}->{action} = 'update';
3382             }
3383         }
3384         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3385         foreach my $cmd (@{$ruleset->{$chain}}) {
3386             print "\t$cmd\n" if $verbose;
3387         }
3388     }
3389
3390     foreach my $chain (sort keys %$active_chains) {
3391         if (!defined($ruleset->{$chain})) {
3392             my $sig = $active_chains->{$chain};
3393             $statushash->{$chain}->{action} = 'delete';
3394             $statushash->{$chain}->{sig} = $sig;
3395             print "delete $chain ($sig)\n" if $verbose;
3396         }
3397     }
3398
3399     return $statushash;
3400 }
3401
3402 sub print_sig_rule {
3403     my ($chain, $sig) = @_;
3404
3405     # We just use this to store a SHA1 checksum used to detect changes
3406     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3407 }
3408
3409 sub get_ruleset_cmdlist {
3410     my ($ruleset, $verbose, $iptablescmd) = @_;
3411
3412     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3413
3414     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3415     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3416
3417     # create missing chains first
3418     foreach my $chain (sort keys %$ruleset) {
3419         my $stat = $statushash->{$chain};
3420         die "internal error" if !$stat;
3421         next if $stat->{action} ne 'create';
3422
3423         $cmdlist .= ":$chain - [0:0]\n";
3424     }
3425
3426     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3427         my $chain = "PVEFW-$h";
3428         if ($ruleset->{$chain} && !$hooks->{$h}) {
3429             $cmdlist .= "-A $h -j $chain\n";
3430         }
3431     }
3432
3433     foreach my $chain (sort keys %$ruleset) {
3434         my $stat = $statushash->{$chain};
3435         die "internal error" if !$stat;
3436
3437         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3438             $cmdlist .= "-F $chain\n";
3439             foreach my $cmd (@{$ruleset->{$chain}}) {
3440                 $cmdlist .= "$cmd\n";
3441             }
3442             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3443         } elsif ($stat->{action} eq 'delete') {
3444             die "internal error"; # this should not happen
3445         } elsif ($stat->{action} eq 'exists') {
3446             # do nothing
3447         } else {
3448             die "internal error - unknown status '$stat->{action}'";
3449         }
3450     }
3451
3452     foreach my $chain (keys %$statushash) {
3453         next if $statushash->{$chain}->{action} ne 'delete';
3454         $cmdlist .= "-F $chain\n";
3455     }
3456     foreach my $chain (keys %$statushash) {
3457         next if $statushash->{$chain}->{action} ne 'delete';
3458         next if $chain eq 'PVEFW-INPUT';
3459         next if $chain eq 'PVEFW-OUTPUT';
3460         next if $chain eq 'PVEFW-FORWARD';
3461         $cmdlist .= "-X $chain\n";
3462     }
3463
3464     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3465
3466     $cmdlist .= "COMMIT\n";
3467
3468     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3469 }
3470
3471 sub get_ipset_cmdlist {
3472     my ($ruleset, $verbose) = @_;
3473
3474     my $cmdlist = "";
3475
3476     my $delete_cmdlist = "";
3477
3478     my $active_chains = ipset_get_chains();
3479     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3480
3481     # remove stale _swap chains
3482     foreach my $chain (keys %$active_chains) {
3483         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3484             $cmdlist .= "destroy $chain\n";
3485         }
3486     }
3487
3488     foreach my $chain (keys %$ruleset) {
3489         my $stat = $statushash->{$chain};
3490         die "internal error" if !$stat;
3491
3492         if ($stat->{action} eq 'create') {
3493             foreach my $cmd (@{$ruleset->{$chain}}) {
3494                 $cmdlist .= "$cmd\n";
3495             }
3496         }
3497     }
3498
3499     foreach my $chain (keys %$ruleset) {
3500         my $stat = $statushash->{$chain};
3501         die "internal error" if !$stat;
3502
3503         if ($stat->{action} eq 'update') {
3504             my $chain_swap = $chain."_swap";
3505
3506             foreach my $cmd (@{$ruleset->{$chain}}) {
3507                 $cmd =~ s/$chain/$chain_swap/;
3508                 $cmdlist .= "$cmd\n";
3509             }
3510             $cmdlist .= "swap $chain_swap $chain\n";
3511             $cmdlist .= "flush $chain_swap\n";
3512             $cmdlist .= "destroy $chain_swap\n";
3513         }
3514     }
3515
3516      # the remove unused chains
3517     foreach my $chain (keys %$statushash) {
3518         next if $statushash->{$chain}->{action} ne 'delete';
3519
3520         $delete_cmdlist .= "flush $chain\n";
3521         $delete_cmdlist .= "destroy $chain\n";
3522     }
3523
3524     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3525
3526     return ($cmdlist, $delete_cmdlist, $changes);
3527 }
3528
3529 sub apply_ruleset {
3530     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3531
3532     enable_bridge_firewall();
3533
3534     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3535         get_ipset_cmdlist($ipset_ruleset, $verbose);
3536
3537     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3538     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3539
3540     if ($verbose) {
3541         if ($ipset_changes) {
3542             print "ipset changes:\n";
3543             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3544             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3545         }
3546
3547         if ($changes) {
3548             print "iptables changes:\n";
3549             print $cmdlist;
3550         }
3551
3552         if ($changesv6) {
3553             print "ip6tables changes:\n";
3554             print $cmdlistv6;
3555         }
3556     }
3557
3558     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3559     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3560
3561     ipset_restore_cmdlist($ipset_create_cmdlist);
3562
3563     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3564     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3565
3566     iptables_restore_cmdlist($cmdlist);
3567
3568     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3569     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3570
3571     ip6tables_restore_cmdlist($cmdlistv6);
3572
3573     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3574     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3575
3576     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3577
3578     # test: re-read status and check if everything is up to date
3579     my $active_chains = iptables_get_chains();
3580     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3581
3582     my $errors;
3583     foreach my $chain (sort keys %$ruleset) {
3584         my $stat = $statushash->{$chain};
3585         if ($stat->{action} ne 'exists') {
3586             warn "unable to update chain '$chain'\n";
3587             $errors = 1;
3588         }
3589     }
3590
3591     my $active_chainsv6 = iptables_get_chains("ip6tables");
3592     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3593
3594     foreach my $chain (sort keys %$rulesetv6) {
3595         my $stat = $statushashv6->{$chain};
3596         if ($stat->{action} ne 'exists') {
3597             warn "unable to update chain '$chain'\n";
3598             $errors = 1;
3599         }
3600     }
3601
3602     die "unable to apply firewall changes\n" if $errors;
3603
3604     update_nf_conntrack_max($hostfw_conf);
3605
3606     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3607
3608 }
3609
3610 sub update_nf_conntrack_max {
3611     my ($hostfw_conf) = @_;
3612
3613     my $max = 65536; # reasonable default
3614
3615     my $options = $hostfw_conf->{options} || {};
3616
3617     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3618         $max = $options->{nf_conntrack_max};
3619         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3620     }
3621
3622     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3623     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3624
3625     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3626
3627     if ($current != $max) {
3628         my $hashsize = int($max/4);
3629         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3630         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3631     }
3632 }
3633
3634 sub update_nf_conntrack_tcp_timeout_established {
3635     my ($hostfw_conf) = @_;
3636
3637     my $options = $hostfw_conf->{options} || {};
3638
3639     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3640
3641     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3642 }
3643
3644 sub remove_pvefw_chains {
3645
3646     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3647     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3648     PVE::Firewall::remove_pvefw_chains_ipset();
3649
3650 }
3651
3652 sub remove_pvefw_chains_iptables {
3653     my ($iptablescmd) = @_;
3654
3655     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3656     my $cmdlist = "*filter\n";
3657
3658     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3659         if ($hooks->{$h}) {
3660             $cmdlist .= "-D $h -j PVEFW-$h\n";
3661         }
3662     }
3663
3664     foreach my $chain (keys %$chash) {
3665         $cmdlist .= "-F $chain\n";
3666     }
3667
3668     foreach my $chain (keys %$chash) {
3669         $cmdlist .= "-X $chain\n";
3670     }
3671     $cmdlist .= "COMMIT\n";
3672
3673     if($iptablescmd eq "ip6tables") {
3674         ip6tables_restore_cmdlist($cmdlist);
3675     } else {
3676         iptables_restore_cmdlist($cmdlist);
3677     }
3678 }
3679
3680 sub remove_pvefw_chains_ipset {
3681
3682     my $ipset_chains = ipset_get_chains();
3683
3684     my $cmdlist = "";
3685
3686     foreach my $chain (keys %$ipset_chains) {
3687         $cmdlist .= "flush $chain\n";
3688         $cmdlist .= "destroy $chain\n";
3689     }
3690
3691     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3692 }
3693
3694 sub init {
3695     my $cluster_conf = load_clusterfw_conf();
3696     my $cluster_options = $cluster_conf->{options};
3697     my $enable = $cluster_options->{enable};
3698
3699     return if !$enable;
3700
3701     # load required modules here
3702 }
3703
3704 sub update {
3705     my $code = sub {
3706
3707         my $cluster_conf = load_clusterfw_conf();
3708         my $cluster_options = $cluster_conf->{options};
3709
3710         if (!$cluster_options->{enable}) {
3711             PVE::Firewall::remove_pvefw_chains();
3712             return;
3713         }
3714
3715         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3716
3717         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3718
3719         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3720     };
3721
3722     run_locked($code);
3723 }
3724
3725 1;