src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::OpenVZ
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     $have_qemu_server = 1;
  32 };
  33
  34 my $have_pve_manager;
  35 eval {
  36     require PVE::OpenVZ;
  37     $have_pve_manager = 1;
  38 };
  39
  40 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  41
  42 mkdir $pve_fw_status_dir; # make sure this exists
  43
  44 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  45 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  46 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47
  48 my $max_alias_name_length = 64;
  49 my $max_ipset_name_length = 64;
  50 my $max_group_name_length = 20;
  51
  52 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  53 sub pve_verify_ip_or_cidr {
  54     my ($cidr, $noerr) = @_;
  55
  56     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  57         return $cidr if Net::IP->new($cidr);
  58         return undef if $noerr;
  59         die Net::IP::Error() . "\n";
  60     }
  61     return undef if $noerr;
  62     die "value does not look like a valid IP address or CIDR network\n";
  63 }
  64
  65 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  66 sub pve_verify_ip_or_cidr_or_alias {
  67     my ($cidr, $noerr) = @_;
  68
  69     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  70
  71     return pve_verify_ip_or_cidr($cidr, $noerr);
  72 }
  73
  74 PVE::JSONSchema::register_standard_option('ipset-name', {
  75     description => "IP set name.",
  76     type => 'string',
  77     pattern => $ipset_name_pattern,
  78     minLength => 2,
  79     maxLength => $max_ipset_name_length,
  80 });
  81
  82 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  83     description => "Alias name.",
  84     type => 'string',
  85     pattern => $ip_alias_pattern,
  86     minLength => 2,
  87     maxLength => $max_alias_name_length,
  88 });
  89
  90 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  91     description => "Log level.",
  92     type => 'string',
  93     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  94     optional => 1,
  95 });
  96
  97 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  98     description => "Security Group name.",
  99     type => 'string',
 100     pattern => $security_group_name_pattern,
 101     minLength => 2,
 102     maxLength => $max_group_name_length,
 103 });
 104
 105 my $feature_ipset_nomatch = 0;
 106 eval  {
 107     my (undef, undef, $release) = POSIX::uname();
 108     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 109         my ($major, $minor) = ($1, $2);
 110         $feature_ipset_nomatch = 1 if ($major > 3) ||
 111             ($major == 3 && $minor >= 7);
 112     }
 113
 114 };
 115
 116 my $nodename = PVE::INotify::nodename();
 117
 118 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 119
 120 my $default_log_level = 'nolog'; # avoid logs by default
 121
 122 my $log_level_hash = {
 123     debug => 7,
 124     info => 6,
 125     notice => 5,
 126     warning => 4,
 127     err => 3,
 128     crit => 2,
 129     alert => 1,
 130     emerg => 0,
 131 };
 132
 133 # we need to overwrite some macros for ipv6
 134 my $pve_ipv6fw_macros = {
 135     'Ping' => [
 136         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 137     ],
 138     'NeighborDiscovery' => [
 139         "IPv6 neighbor solicitation, neighbor and router advertisement",
 140         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 141         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 143     ],
 144     'Trcrt' => [
 145         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 146         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 147     ],
 148  };
 149
 150 # imported/converted from: /usr/share/shorewall/macro.*
 151 my $pve_fw_macros = {
 152     'Amanda' => [
 153         "Amanda Backup",
 154         { action => 'PARAM', proto => 'udp', dport => '10080' },
 155         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 156     ],
 157     'Auth' => [
 158         "Auth (identd) traffic",
 159         { action => 'PARAM', proto => 'tcp', dport => '113' },
 160     ],
 161     'BGP' => [
 162         "Border Gateway Protocol traffic",
 163         { action => 'PARAM', proto => 'tcp', dport => '179' },
 164     ],
 165     'BitTorrent' => [
 166         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 167         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 168         { action => 'PARAM', proto => 'udp', dport => '6881' },
 169     ],
 170     'BitTorrent32' => [
 171         "BitTorrent traffic for BitTorrent 3.2 and later",
 172         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 173         { action => 'PARAM', proto => 'udp', dport => '6881' },
 174     ],
 175     'Ceph' => [
 176         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 177         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 178         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 179     ],
 180     'CVS' => [
 181         "Concurrent Versions System pserver traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 183     ],
 184     'Citrix' => [
 185         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 186         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 187         { action => 'PARAM', proto => 'udp', dport => '1604' },
 188         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 189     ],
 190     'DAAP' => [
 191         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 192         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 193         { action => 'PARAM', proto => 'udp', dport => '3689' },
 194     ],
 195     'DCC' => [
 196         "Distributed Checksum Clearinghouse spam filtering mechanism",
 197         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 198     ],
 199     'DHCPfwd' => [
 200         "Forwarded DHCP traffic",
 201         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 202     ],
 203     'DNS' => [
 204         "Domain Name System traffic (upd and tcp)",
 205         { action => 'PARAM', proto => 'udp', dport => '53' },
 206         { action => 'PARAM', proto => 'tcp', dport => '53' },
 207     ],
 208     'Distcc' => [
 209         "Distributed Compiler service",
 210         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 211     ],
 212     'FTP' => [
 213         "File Transfer Protocol",
 214         { action => 'PARAM', proto => 'tcp', dport => '21' },
 215     ],
 216     'Finger' => [
 217         "Finger protocol (RFC 742)",
 218         { action => 'PARAM', proto => 'tcp', dport => '79' },
 219     ],
 220     'GNUnet' => [
 221         "GNUnet secure peer-to-peer networking traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 223         { action => 'PARAM', proto => 'udp', dport => '2086' },
 224         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 225         { action => 'PARAM', proto => 'udp', dport => '1080' },
 226     ],
 227     'GRE' => [
 228         "Generic Routing Encapsulation tunneling protocol",
 229         { action => 'PARAM', proto => '47' },
 230     ],
 231     'Git' => [
 232         "Git distributed revision control traffic",
 233         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 234     ],
 235     'HKP' => [
 236         "OpenPGP HTTP keyserver protocol traffic",
 237         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 238     ],
 239     'HTTP' => [
 240         "Hypertext Transfer Protocol (WWW)",
 241         { action => 'PARAM', proto => 'tcp', dport => '80' },
 242     ],
 243     'HTTPS' => [
 244         "Hypertext Transfer Protocol (WWW) over SSL",
 245         { action => 'PARAM', proto => 'tcp', dport => '443' },
 246     ],
 247     'ICPV2' => [
 248         "Internet Cache Protocol V2 (Squid) traffic",
 249         { action => 'PARAM', proto => 'udp', dport => '3130' },
 250     ],
 251     'ICQ' => [
 252         "AOL Instant Messenger traffic",
 253         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 254     ],
 255     'IMAP' => [
 256         "Internet Message Access Protocol",
 257         { action => 'PARAM', proto => 'tcp', dport => '143' },
 258     ],
 259     'IMAPS' => [
 260         "Internet Message Access Protocol over SSL",
 261         { action => 'PARAM', proto => 'tcp', dport => '993' },
 262     ],
 263     'IPIP' => [
 264         "IPIP capsulation traffic",
 265         { action => 'PARAM', proto => '94' },
 266     ],
 267     'IPsec' => [
 268         "IPsec traffic",
 269         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 270         { action => 'PARAM', proto => '50' },
 271     ],
 272     'IPsecah' => [
 273         "IPsec authentication (AH) traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 275         { action => 'PARAM', proto => '51' },
 276     ],
 277     'IPsecnat' => [
 278         "IPsec traffic and Nat-Traversal",
 279         { action => 'PARAM', proto => 'udp', dport => '500' },
 280         { action => 'PARAM', proto => 'udp', dport => '4500' },
 281         { action => 'PARAM', proto => '50' },
 282     ],
 283     'IRC' => [
 284         "Internet Relay Chat traffic",
 285         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 286     ],
 287     'Jetdirect' => [
 288         "HP Jetdirect printing",
 289         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 290     ],
 291     'L2TP' => [
 292         "Layer 2 Tunneling Protocol traffic",
 293         { action => 'PARAM', proto => 'udp', dport => '1701' },
 294     ],
 295     'LDAP' => [
 296         "Lightweight Directory Access Protocol traffic",
 297         { action => 'PARAM', proto => 'tcp', dport => '389' },
 298     ],
 299     'LDAPS' => [
 300         "Secure Lightweight Directory Access Protocol traffic",
 301         { action => 'PARAM', proto => 'tcp', dport => '636' },
 302     ],
 303     'MSNP' => [
 304         "Microsoft Notification Protocol",
 305         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 306     ],
 307     'MSSQL' => [
 308         "Microsoft SQL Server",
 309         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 310     ],
 311     'Mail' => [
 312         "Mail traffic (SMTP, SMTPS, Submission)",
 313         { action => 'PARAM', proto => 'tcp', dport => '25' },
 314         { action => 'PARAM', proto => 'tcp', dport => '465' },
 315         { action => 'PARAM', proto => 'tcp', dport => '587' },
 316     ],
 317     'Munin' => [
 318         "Munin networked resource monitoring traffic",
 319         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 320     ],
 321     'MySQL' => [
 322         "MySQL server",
 323         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 324     ],
 325     'NNTP' => [
 326         "NNTP traffic (Usenet).",
 327         { action => 'PARAM', proto => 'tcp', dport => '119' },
 328     ],
 329     'NNTPS' => [
 330         "Encrypted NNTP traffic (Usenet)",
 331         { action => 'PARAM', proto => 'tcp', dport => '563' },
 332     ],
 333     'NTP' => [
 334         "Network Time Protocol (ntpd)",
 335         { action => 'PARAM', proto => 'udp', dport => '123' },
 336     ],
 337     'OSPF' => [
 338         "OSPF multicast traffic",
 339         { action => 'PARAM', proto => '89' },
 340     ],
 341     'OpenVPN' => [
 342         "OpenVPN traffic",
 343         { action => 'PARAM', proto => 'udp', dport => '1194' },
 344     ],
 345     'PCA' => [
 346         "Symantec PCAnywere (tm)",
 347         { action => 'PARAM', proto => 'udp', dport => '5632' },
 348         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 349     ],
 350     'POP3' => [
 351         "POP3 traffic",
 352         { action => 'PARAM', proto => 'tcp', dport => '110' },
 353     ],
 354     'POP3S' => [
 355         "Encrypted POP3 traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '995' },
 357     ],
 358     'PPtP' => [
 359         "Point-to-Point Tunneling Protocol",
 360         { action => 'PARAM', proto => '47' },
 361         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 362     ],
 363     'Ping' => [
 364         "ICMP echo request",
 365         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 366     ],
 367     'PostgreSQL' => [
 368         "PostgreSQL server",
 369         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 370     ],
 371     'Printer' => [
 372         "Line Printer protocol printing",
 373         { action => 'PARAM', proto => 'tcp', dport => '515' },
 374     ],
 375     'RDP' => [
 376         "Microsoft Remote Desktop Protocol traffic",
 377         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 378     ],
 379     'RIP' => [
 380         "Routing Information Protocol (bidirectional)",
 381         { action => 'PARAM', proto => 'udp', dport => '520' },
 382     ],
 383     'RNDC' => [
 384         "BIND remote management protocol",
 385         { action => 'PARAM', proto => 'tcp', dport => '953' },
 386     ],
 387     'Razor' => [
 388         "Razor Antispam System",
 389         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 390     ],
 391     'Rdate' => [
 392         "Remote time retrieval (rdate)",
 393         { action => 'PARAM', proto => 'tcp', dport => '37' },
 394     ],
 395     'Rsync' => [
 396         "Rsync server",
 397         { action => 'PARAM', proto => 'tcp', dport => '873' },
 398     ],
 399     'SANE' => [
 400         "SANE network scanning",
 401         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 402     ],
 403     'SMB' => [
 404         "Microsoft SMB traffic",
 405         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 406         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 407         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 408         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 409     ],
 410     'SMBswat' => [
 411         "Samba Web Administration Tool",
 412         { action => 'PARAM', proto => 'tcp', dport => '901' },
 413     ],
 414     'SMTP' => [
 415         "Simple Mail Transfer Protocol",
 416         { action => 'PARAM', proto => 'tcp', dport => '25' },
 417     ],
 418     'SMTPS' => [
 419         "Encrypted Simple Mail Transfer Protocol",
 420         { action => 'PARAM', proto => 'tcp', dport => '465' },
 421     ],
 422     'SNMP' => [
 423         "Simple Network Management Protocol",
 424         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 425         { action => 'PARAM', proto => 'tcp', dport => '161' },
 426     ],
 427     'SPAMD' => [
 428         "Spam Assassin SPAMD traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '783' },
 430     ],
 431     'SSH' => [
 432         "Secure shell traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '22' },
 434     ],
 435     'SVN' => [
 436         "Subversion server (svnserve)",
 437         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 438     ],
 439     'SixXS' => [
 440         "SixXS IPv6 Deployment and Tunnel Broker",
 441         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 442         { action => 'PARAM', proto => 'udp', dport => '3740' },
 443         { action => 'PARAM', proto => '41' },
 444         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 445     ],
 446     'Squid' => [
 447         "Squid web proxy traffic",
 448         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 449     ],
 450     'Submission' => [
 451         "Mail message submission traffic",
 452         { action => 'PARAM', proto => 'tcp', dport => '587' },
 453     ],
 454     'Syslog' => [
 455         "Syslog protocol (RFC 5424) traffic",
 456         { action => 'PARAM', proto => 'udp', dport => '514' },
 457         { action => 'PARAM', proto => 'tcp', dport => '514' },
 458     ],
 459     'TFTP' => [
 460         "Trivial File Transfer Protocol traffic",
 461         { action => 'PARAM', proto => 'udp', dport => '69' },
 462     ],
 463     'Telnet' => [
 464         "Telnet traffic",
 465         { action => 'PARAM', proto => 'tcp', dport => '23' },
 466     ],
 467     'Telnets' => [
 468         "Telnet over SSL",
 469         { action => 'PARAM', proto => 'tcp', dport => '992' },
 470     ],
 471     'Time' => [
 472         "RFC 868 Time protocol",
 473         { action => 'PARAM', proto => 'tcp', dport => '37' },
 474     ],
 475     'Trcrt' => [
 476         "Traceroute (for up to 30 hops) traffic",
 477         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 478         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 479     ],
 480     'VNC' => [
 481         "VNC traffic for VNC display's 0 - 99",
 482         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 483     ],
 484     'VNCL' => [
 485         "VNC traffic from Vncservers to Vncviewers in listen mode",
 486         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 487     ],
 488     'Web' => [
 489         "WWW traffic (HTTP and HTTPS)",
 490         { action => 'PARAM', proto => 'tcp', dport => '80' },
 491         { action => 'PARAM', proto => 'tcp', dport => '443' },
 492     ],
 493     'Webcache' => [
 494         "Web Cache/Proxy traffic (port 8080)",
 495         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 496     ],
 497     'Webmin' => [
 498         "Webmin traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 500     ],
 501     'Whois' => [
 502         "Whois (nicname, RFC 3912) traffic",
 503         { action => 'PARAM', proto => 'tcp', dport => '43' },
 504     ],
 505 };
 506
 507 my $pve_fw_parsed_macros;
 508 my $pve_fw_macro_descr;
 509 my $pve_fw_macro_ipversion = {};
 510 my $pve_fw_preferred_macro_names = {};
 511
 512 my $pve_std_chains = {};
 513 $pve_std_chains->{4} = {
 514     'PVEFW-SET-ACCEPT-MARK' => [
 515         "-j MARK --set-mark 1",
 516     ],
 517     'PVEFW-DropBroadcast' => [
 518         # same as shorewall 'Broadcast'
 519         # simply DROP BROADCAST/MULTICAST/ANYCAST
 520         # we can use this to reduce logging
 521         { action => 'DROP', dsttype => 'BROADCAST' },
 522         { action => 'DROP', dsttype => 'MULTICAST' },
 523         { action => 'DROP', dsttype => 'ANYCAST' },
 524         { action => 'DROP', dest => '224.0.0.0/4' },
 525     ],
 526     'PVEFW-reject' => [
 527         # same as shorewall 'reject'
 528         { action => 'DROP', dsttype => 'BROADCAST' },
 529         { action => 'DROP', source => '224.0.0.0/4' },
 530         { action => 'DROP', proto => 'icmp' },
 531         "-p tcp -j REJECT --reject-with tcp-reset",
 532         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 533         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 534         "-j REJECT --reject-with icmp-host-prohibited",
 535     ],
 536     'PVEFW-Drop' => [
 537         # same as shorewall 'Drop', which is equal to DROP,
 538         # but REJECT/DROP some packages to reduce logging,
 539         # and ACCEPT critical ICMP types
 540         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 541         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 542         { action => 'PVEFW-DropBroadcast' },
 543         # ACCEPT critical ICMP types
 544         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 545         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 546         # Drop packets with INVALID state
 547         "-m conntrack --ctstate INVALID -j DROP",
 548         # Drop Microsoft SMB noise
 549         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 550         { action => 'DROP', proto => 'udp', dport => '137:139'},
 551         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 552         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 553         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 554         # Drop new/NotSyn traffic so that it doesn't get logged
 555         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 556         # Drop DNS replies
 557         { action => 'DROP', proto => 'udp', sport => 53 },
 558     ],
 559     'PVEFW-Reject' => [
 560         # same as shorewall 'Reject', which is equal to Reject,
 561         # but REJECT/DROP some packages to reduce logging,
 562         # and ACCEPT critical ICMP types
 563         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 564         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 565         { action => 'PVEFW-DropBroadcast' },
 566         # ACCEPT critical ICMP types
 567         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 569         # Drop packets with INVALID state
 570         "-m conntrack --ctstate INVALID -j DROP",
 571         # Drop Microsoft SMB noise
 572         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 573         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 574         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 575         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 576         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 577         # Drop new/NotSyn traffic so that it doesn't get logged
 578         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 579         # Drop DNS replies
 580         { action => 'DROP', proto => 'udp', sport => 53 },
 581     ],
 582     'PVEFW-tcpflags' => [
 583         # same as shorewall tcpflags action.
 584         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 585         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 586         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 587         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 588         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 589         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 590     ],
 591     'PVEFW-smurfs' => [
 592         # same as shorewall smurfs action
 593         # Filter packets for smurfs (packets with a broadcast address as the source).
 594         "-s 0.0.0.0/32 -j RETURN",
 595         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 596         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 597     ],
 598 };
 599
 600 $pve_std_chains->{6} = {
 601     'PVEFW-SET-ACCEPT-MARK' => [
 602         "-j MARK --set-mark 1",
 603     ],
 604     'PVEFW-DropBroadcast' => [
 605         # same as shorewall 'Broadcast'
 606         # simply DROP BROADCAST/MULTICAST/ANYCAST
 607         # we can use this to reduce logging
 608         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 609         # ipv6 addrtype does not work with kernel 2.6.32
 610         #{ action => 'DROP', dsttype => 'MULTICAST' },
 611         #{ action => 'DROP', dsttype => 'ANYCAST' },
 612         { action => 'DROP', dest => 'ff00::/8' },
 613         #{ action => 'DROP', dest => '224.0.0.0/4' },
 614     ],
 615     'PVEFW-reject' => [
 616         # same as shorewall 'reject'
 617         #{ action => 'DROP', dsttype => 'BROADCAST' },
 618         #{ action => 'DROP', source => '224.0.0.0/4' },
 619         { action => 'DROP', proto => 'icmpv6' },
 620         "-p tcp -j REJECT --reject-with tcp-reset",
 621         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 622         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 623         #"-j REJECT --reject-with icmp-host-prohibited",
 624     ],
 625     'PVEFW-Drop' => [
 626         # same as shorewall 'Drop', which is equal to DROP,
 627         # but REJECT/DROP some packages to reduce logging,
 628         # and ACCEPT critical ICMP types
 629         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 630         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 631         { action => 'PVEFW-DropBroadcast' },
 632         # ACCEPT critical ICMP types
 633         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 634         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 635         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 636
 637         # Drop packets with INVALID state
 638         "-m conntrack --ctstate INVALID -j DROP",
 639         # Drop Microsoft SMB noise
 640         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 641         { action => 'DROP', proto => 'udp', dport => '137:139'},
 642         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 643         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 644         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 645         # Drop new/NotSyn traffic so that it doesn't get logged
 646         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 647         # Drop DNS replies
 648         { action => 'DROP', proto => 'udp', sport => 53 },
 649     ],
 650     'PVEFW-Reject' => [
 651         # same as shorewall 'Reject', which is equal to Reject,
 652         # but REJECT/DROP some packages to reduce logging,
 653         # and ACCEPT critical ICMP types
 654         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 655         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 656         { action => 'PVEFW-DropBroadcast' },
 657         # ACCEPT critical ICMP types
 658         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 660         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 661
 662         # Drop packets with INVALID state
 663         "-m conntrack --ctstate INVALID -j DROP",
 664         # Drop Microsoft SMB noise
 665         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 666         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 667         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 668         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 669         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 670         # Drop new/NotSyn traffic so that it doesn't get logged
 671         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 672         # Drop DNS replies
 673         { action => 'DROP', proto => 'udp', sport => 53 },
 674     ],
 675     'PVEFW-tcpflags' => [
 676         # same as shorewall tcpflags action.
 677         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 678         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 679         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 680         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 681         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 682         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 683     ],
 684 };
 685
 686 # iptables -p icmp -h
 687 my $icmp_type_names = {
 688     any => 1,
 689     'echo-reply' => 1,
 690     'destination-unreachable' => 1,
 691     'network-unreachable' => 1,
 692     'host-unreachable' => 1,
 693     'protocol-unreachable' => 1,
 694     'port-unreachable' => 1,
 695     'fragmentation-needed' => 1,
 696     'source-route-failed' => 1,
 697     'network-unknown' => 1,
 698     'host-unknown' => 1,
 699     'network-prohibited' => 1,
 700     'host-prohibited' => 1,
 701     'TOS-network-unreachable' => 1,
 702     'TOS-host-unreachable' => 1,
 703     'communication-prohibited' => 1,
 704     'host-precedence-violation' => 1,
 705     'precedence-cutoff' => 1,
 706     'source-quench' => 1,
 707     'redirect' => 1,
 708     'network-redirect' => 1,
 709     'host-redirect' => 1,
 710     'TOS-network-redirect' => 1,
 711     'TOS-host-redirect' => 1,
 712     'echo-request' => 1,
 713     'router-advertisement' => 1,
 714     'router-solicitation' => 1,
 715     'time-exceeded' => 1,
 716     'ttl-zero-during-transit' => 1,
 717     'ttl-zero-during-reassembly' => 1,
 718     'parameter-problem' => 1,
 719     'ip-header-bad' => 1,
 720     'required-option-missing' => 1,
 721     'timestamp-request' => 1,
 722     'timestamp-reply' => 1,
 723     'address-mask-request' => 1,
 724     'address-mask-reply' => 1,
 725 };
 726
 727 # ip6tables -p icmpv6 -h
 728
 729 my $icmpv6_type_names = {
 730     'any' => 1,
 731     'destination-unreachable' => 1,
 732     'no-route' => 1,
 733     'communication-prohibited' => 1,
 734     'address-unreachable' => 1,
 735     'port-unreachable' => 1,
 736     'packet-too-big' => 1,
 737     'time-exceeded' => 1,
 738     'ttl-zero-during-transit' => 1,
 739     'ttl-zero-during-reassembly' => 1,
 740     'parameter-problem' => 1,
 741     'bad-header' => 1,
 742     'unknown-header-type' => 1,
 743     'unknown-option' => 1,
 744     'echo-request' => 1,
 745     'echo-reply' => 1,
 746     'router-solicitation' => 1,
 747     'router-advertisement' => 1,
 748     'neighbor-solicitation' => 1,
 749     'neighbour-solicitation' => 1,
 750     'neighbor-advertisement' => 1,
 751     'neighbour-advertisement' => 1,
 752     'redirect' => 1,
 753 };
 754
 755 sub init_firewall_macros {
 756
 757     $pve_fw_parsed_macros = {};
 758
 759     my $parse = sub {
 760         my ($k, $macro) = @_;
 761         my $lc_name = lc($k);
 762         $pve_fw_macro_ipversion->{$k} = 0;
 763         while (!ref($macro->[0])) {
 764             my $desc = shift @$macro;
 765             if ($desc eq 'ipv4only') {
 766                 $pve_fw_macro_ipversion->{$k} = 4;
 767             } elsif ($desc eq 'ipv6only') {
 768                 $pve_fw_macro_ipversion->{$k} = 6;
 769             } else {
 770                 $pve_fw_macro_descr->{$k} = $desc;
 771             }
 772         }
 773         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 774         $pve_fw_parsed_macros->{$k} = $macro;
 775     };
 776
 777     foreach my $k (keys %$pve_fw_macros) {
 778         &$parse($k, $pve_fw_macros->{$k});
 779     }
 780
 781     foreach my $k (keys %$pve_ipv6fw_macros) {
 782         next if $pve_fw_parsed_macros->{$k};
 783         &$parse($k, $pve_ipv6fw_macros->{$k});
 784         $pve_fw_macro_ipversion->{$k} = 6;
 785     }
 786 }
 787
 788 init_firewall_macros();
 789
 790 sub get_macros {
 791     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 792 }
 793
 794 my $etc_services;
 795
 796 sub get_etc_services {
 797
 798     return $etc_services if $etc_services;
 799
 800     my $filename = "/etc/services";
 801
 802     my $fh = IO::File->new($filename, O_RDONLY);
 803     if (!$fh) {
 804         warn "unable to read '$filename' - $!\n";
 805         return {};
 806     }
 807
 808     my $services = {};
 809
 810     while (my $line = <$fh>) {
 811         chomp ($line);
 812         next if $line =~m/^#/;
 813         next if ($line =~m/^\s*$/);
 814
 815         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 816             $services->{byid}->{$2}->{name} = $1;
 817             $services->{byid}->{$2}->{port} = $2;
 818             $services->{byid}->{$2}->{$3} = 1;
 819             $services->{byname}->{$1} = $services->{byid}->{$2};
 820         }
 821     }
 822
 823     close($fh);
 824
 825     $etc_services = $services;
 826
 827
 828     return $etc_services;
 829 }
 830
 831 my $etc_protocols;
 832
 833 sub get_etc_protocols {
 834     return $etc_protocols if $etc_protocols;
 835
 836     my $filename = "/etc/protocols";
 837
 838     my $fh = IO::File->new($filename, O_RDONLY);
 839     if (!$fh) {
 840         warn "unable to read '$filename' - $!\n";
 841         return {};
 842     }
 843
 844     my $protocols = {};
 845
 846     while (my $line = <$fh>) {
 847         chomp ($line);
 848         next if $line =~m/^#/;
 849         next if ($line =~m/^\s*$/);
 850
 851         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 852             $protocols->{byid}->{$2}->{name} = $1;
 853             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 854         }
 855     }
 856
 857     close($fh);
 858
 859     # add special case for ICMP v6
 860     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 861     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 862
 863     $etc_protocols = $protocols;
 864
 865     return $etc_protocols;
 866 }
 867
 868 my $ipv4_mask_hash_localnet = {
 869     '255.255.0.0' => 16,
 870     '255.255.128.0' => 17,
 871     '255.255.192.0' => 18,
 872     '255.255.224.0' => 19,
 873     '255.255.240.0' => 20,
 874     '255.255.248.0' => 21,
 875     '255.255.252.0' => 22,
 876     '255.255.254.0' => 23,
 877     '255.255.255.0' => 24,
 878     '255.255.255.128' => 25,
 879     '255.255.255.192' => 26,
 880     '255.255.255.224' => 27,
 881     '255.255.255.240' => 28,
 882     '255.255.255.248' => 29,
 883     '255.255.255.252' => 30,
 884 };
 885
 886 my $__local_network;
 887
 888 sub local_network {
 889     my ($new_value) = @_;
 890
 891     $__local_network = $new_value if defined($new_value);
 892
 893     return $__local_network if defined($__local_network);
 894
 895     eval {
 896         my $nodename = PVE::INotify::nodename();
 897
 898         my $ip = PVE::Cluster::remote_node_ip($nodename);
 899
 900         my $testip = Net::IP->new($ip);
 901
 902         my $routes = PVE::ProcFSTools::read_proc_net_route();
 903         foreach my $entry (@$routes) {
 904             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 905             next if !defined($mask);
 906             return if $mask eq '0.0.0.0';
 907             my $cidr = "$entry->{dest}/$mask";
 908             my $testnet = Net::IP->new($cidr);
 909             if ($testnet->overlaps($testip)) {
 910                 $__local_network = $cidr;
 911                 return;
 912             }
 913         }
 914     };
 915     warn $@ if $@;
 916
 917     return $__local_network;
 918 }
 919
 920 # ipset names are limited to 31 characters,
 921 # and we use '-v4' or '-v6' to indicate IP versions,
 922 # and we use '_swap' suffix for atomic update,
 923 # for example PVEFW-${VMID}-${ipset_name}_swap
 924
 925 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 926
 927 sub compute_ipset_chain_name {
 928     my ($vmid, $ipset_name, $ipversion) = @_;
 929
 930     $vmid = 0 if !defined($vmid);
 931
 932     my $id = "$vmid-${ipset_name}-v$ipversion";
 933
 934     if (length($id) > $max_iptables_ipset_name_length) {
 935         $id = PVE::Tools::fnv31a_hex($id);
 936     }
 937
 938     return "PVEFW-$id";
 939 }
 940
 941 sub compute_ipfilter_ipset_name {
 942     my ($iface) = @_;
 943
 944     return "ipfilter-$iface";
 945 }
 946
 947 sub parse_address_list {
 948     my ($str) = @_;
 949
 950     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 951         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 952         return;
 953     }
 954
 955     if ($str =~ m/^${ip_alias_pattern}$/) {
 956         die "alias name too long\n" if length($str) > $max_alias_name_length;
 957         return;
 958     }
 959
 960     my $count = 0;
 961     my $iprange = 0;
 962     my $ipversion;
 963
 964     foreach my $elem (split(/,/, $str)) {
 965         $count++;
 966         my $ip = Net::IP->new($elem);
 967         if (!$ip) {
 968             my $err = Net::IP::Error();
 969             die "invalid IP address: $err\n";
 970         }
 971         $iprange = 1 if $elem =~ m/-/;
 972
 973         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 974
 975         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 976             if $ipversion && ($new_ipversion != $ipversion);
 977
 978         $ipversion = $new_ipversion;
 979     }
 980
 981     die "you can't use a range in a list\n" if $iprange && $count > 1;
 982
 983     return $ipversion;
 984 }
 985
 986 sub parse_port_name_number_or_range {
 987     my ($str) = @_;
 988
 989     my $services = PVE::Firewall::get_etc_services();
 990     my $count = 0;
 991     my $icmp_port = 0;
 992
 993     foreach my $item (split(/,/, $str)) {
 994         $count++;
 995         if ($item =~ m/^(\d+):(\d+)$/) {
 996             my ($port1, $port2) = ($1, $2);
 997             die "invalid port '$port1'\n" if $port1 > 65535;
 998             die "invalid port '$port2'\n" if $port2 > 65535;
 999         } elsif ($item =~ m/^(\d+)$/) {
1000             my $port = $1;
1001             die "invalid port '$port'\n" if $port > 65535;
1002         } else {
1003             if ($icmp_type_names->{$item}) {
1004                 $icmp_port = 1;
1005             } elsif ($icmpv6_type_names->{$item}) {
1006                 $icmp_port = 1;
1007             } else {
1008                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1009             }
1010         }
1011     }
1012
1013     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1014
1015     return $count;
1016 }
1017
1018 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
1019 sub pve_fw_verify_port_spec {
1020    my ($portstr) = @_;
1021
1022    parse_port_name_number_or_range($portstr);
1023
1024    return $portstr;
1025 }
1026
1027 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1028 sub pve_fw_verify_addr_spec {
1029    my ($list) = @_;
1030
1031    parse_address_list($list);
1032
1033    return $list;
1034 }
1035
1036 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1037 sub pve_fw_verify_protocol_spec {
1038    my ($proto) = @_;
1039
1040    my $protocols = get_etc_protocols();
1041
1042    die "unknown protocol '$proto'\n" if $proto &&
1043        !(defined($protocols->{byname}->{$proto}) ||
1044          defined($protocols->{byid}->{$proto}));
1045
1046    return $proto;
1047 }
1048
1049
1050 # helper function for API
1051
1052 sub copy_opject_with_digest {
1053     my ($object) = @_;
1054
1055     my $sha = Digest::SHA->new('sha1');
1056
1057     my $res = {};
1058     foreach my $k (sort keys %$object) {
1059         my $v = $object->{$k};
1060         next if !defined($v);
1061         $res->{$k} = $v;
1062         $sha->add($k, ':', $v, "\n");
1063     }
1064
1065     my $digest = $sha->hexdigest;
1066
1067     $res->{digest} = $digest;
1068
1069     return wantarray ? ($res, $digest) : $res;
1070 }
1071
1072 sub copy_list_with_digest {
1073     my ($list) = @_;
1074
1075     my $sha = Digest::SHA->new('sha1');
1076
1077     my $res = [];
1078     foreach my $entry (@$list) {
1079         my $data = {};
1080         foreach my $k (sort keys %$entry) {
1081             my $v = $entry->{$k};
1082             next if !defined($v);
1083             $data->{$k} = $v;
1084             # Note: digest ignores refs ($rule->{errors})
1085             $sha->add($k, ':', $v, "\n") if !ref($v); ;
1086         }
1087         push @$res, $data;
1088     }
1089
1090     my $digest = $sha->hexdigest;
1091
1092     foreach my $entry (@$res) {
1093         $entry->{digest} = $digest;
1094     }
1095
1096     return wantarray ? ($res, $digest) : $res;
1097 }
1098
1099 my $rule_properties = {
1100     pos => {
1101         description => "Update rule at position <pos>.",
1102         type => 'integer',
1103         minimum => 0,
1104         optional => 1,
1105     },
1106     digest => get_standard_option('pve-config-digest'),
1107     type => {
1108         type => 'string',
1109         optional => 1,
1110         enum => ['in', 'out', 'group'],
1111     },
1112     action => {
1113         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1114         type => 'string',
1115         optional => 1,
1116         pattern => $security_group_name_pattern,
1117         maxLength => 20,
1118         minLength => 2,
1119     },
1120     macro => {
1121         type => 'string',
1122         optional => 1,
1123         maxLength => 128,
1124     },
1125     iface => get_standard_option('pve-iface', { optional => 1 }),
1126     source => {
1127         type => 'string', format => 'pve-fw-addr-spec',
1128         optional => 1,
1129     },
1130     dest => {
1131         type => 'string', format => 'pve-fw-addr-spec',
1132         optional => 1,
1133     },
1134     proto => {
1135         type => 'string', format => 'pve-fw-protocol-spec',
1136         optional => 1,
1137     },
1138     enable => {
1139         type => 'integer',
1140         minimum => 0,
1141         optional => 1,
1142     },
1143     sport => {
1144         type => 'string', format => 'pve-fw-port-spec',
1145         optional => 1,
1146     },
1147     dport => {
1148         type => 'string', format => 'pve-fw-port-spec',
1149         optional => 1,
1150     },
1151     comment => {
1152         type => 'string',
1153         optional => 1,
1154     },
1155 };
1156
1157 sub add_rule_properties {
1158     my ($properties) = @_;
1159
1160     foreach my $k (keys %$rule_properties) {
1161         my $h = $rule_properties->{$k};
1162         # copy data, so that we can modify later without side effects
1163         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1164     }
1165
1166     return $properties;
1167 }
1168
1169 sub delete_rule_properties {
1170     my ($rule, $delete_str) = @_;
1171
1172     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1173         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1174             if !defined($rule_properties->{$opt});
1175         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1176             if $opt eq 'type' || $opt eq 'action';
1177         delete $rule->{$opt};
1178     }
1179
1180     return $rule;
1181 }
1182
1183 my $apply_macro = sub {
1184     my ($macro_name, $param, $verify, $ipversion) = @_;
1185
1186     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1187     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1188
1189     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1190         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1191     }
1192
1193     # skip macros which are specific to another ipversion
1194     return if ($ipversion//0) != ($pve_fw_macro_ipversion->{$macro_name}//0);
1195
1196     my $rules = [];
1197
1198     foreach my $templ (@$macro_rules) {
1199         my $rule = {};
1200         my $param_used = {};
1201         foreach my $k (keys %$templ) {
1202             my $v = $templ->{$k};
1203             if ($v eq 'PARAM') {
1204                 $v = $param->{$k};
1205                 $param_used->{$k} = 1;
1206             } elsif ($v eq 'DEST') {
1207                 $v = $param->{dest};
1208                 $param_used->{dest} = 1;
1209             } elsif ($v eq 'SOURCE') {
1210                 $v = $param->{source};
1211                 $param_used->{source} = 1;
1212             }
1213
1214             if (!defined($v)) {
1215                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1216                 raise_param_exc({ macro => $msg }) if $verify;
1217                 die "$msg\n";
1218             }
1219             $rule->{$k} = $v;
1220         }
1221         foreach my $k (keys %$param) {
1222             next if $k eq 'macro';
1223             next if !defined($param->{$k});
1224             next if $param_used->{$k};
1225             if (defined($rule->{$k})) {
1226                 if ($rule->{$k} ne $param->{$k}) {
1227                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1228                     raise_param_exc({ $k => $msg }) if $verify;
1229                     die "$msg\n";
1230                 }
1231             } else {
1232                 $rule->{$k} = $param->{$k};
1233             }
1234         }
1235         push @$rules, $rule;
1236     }
1237
1238     return $rules;
1239 };
1240
1241 my $rule_env_iface_lookup = {
1242     'ct' => 1,
1243     'vm' => 1,
1244     'group' => 0,
1245     'cluster' => 1,
1246     'host' => 1,
1247 };
1248
1249 sub verify_rule {
1250     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1251
1252     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1253
1254     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1255     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1256
1257     my $errors = $rule->{errors} || {};
1258
1259     my $error_count = 0;
1260
1261     my $add_error = sub {
1262         my ($param, $msg)  = @_;
1263         chomp $msg;
1264         raise_param_exc({ $param => $msg }) if !$noerr;
1265         $error_count++;
1266         $errors->{$param} = $msg if !$errors->{$param};
1267     };
1268
1269     my $ipversion;
1270     my $set_ip_version = sub {
1271         my $vers = shift;
1272         if ($vers) {
1273             die "detected mixed ipv4/ipv6 adresses in rule\n"
1274                 if $ipversion && ($vers != $ipversion);
1275             $ipversion = $vers;
1276         }
1277     };
1278
1279     my $check_ipset_or_alias_property = sub {
1280         my ($name, $expected_ipversion) = @_;
1281
1282         if (my $value = $rule->{$name}) {
1283             if ($value =~ m/^\+/) {
1284                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1285                     &$add_error($name, "no such ipset '$1'")
1286                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1287
1288                 } else {
1289                     &$add_error($name, "invalid ipset name '$value'");
1290                 }
1291             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1292                 my $alias = lc($value);
1293                 &$add_error($name, "no such alias '$value'")
1294                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1295                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1296                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1297
1298                 &$set_ip_version($e->{ipversion});
1299             }
1300         }
1301     };
1302
1303     my $type = $rule->{type};
1304     my $action = $rule->{action};
1305
1306     &$add_error('type', "missing property") if !$type;
1307     &$add_error('action', "missing property") if !$action;
1308
1309     if ($type) {
1310         if ($type eq  'in' || $type eq 'out') {
1311             &$add_error('action', "unknown action '$action'")
1312                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1313         } elsif ($type eq 'group') {
1314             &$add_error('type', "security groups not allowed")
1315                 if !$allow_groups;
1316             &$add_error('action', "invalid characters in security group name")
1317                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1318         } else {
1319             &$add_error('type', "unknown rule type '$type'");
1320         }
1321     }
1322
1323     if ($rule->{iface}) {
1324         &$add_error('type', "parameter -i not allowed for this rule type")
1325             if !$allow_iface;
1326         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1327         &$add_error('iface', $@) if $@;
1328         if ($rule_env eq 'vm') {
1329             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1330                 if $rule->{iface} !~  m/^net(\d+)$/;
1331         } elsif ($rule_env eq 'ct') {
1332             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1333                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1334         }
1335     }
1336
1337     if ($rule->{macro}) {
1338         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1339             $rule->{macro} = $preferred_name;
1340         } else {
1341             &$add_error('macro', "unknown macro '$rule->{macro}'");
1342         }
1343     }
1344
1345     if ($rule->{proto}) {
1346         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1347         &$add_error('proto', $@) if $@;
1348         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1349         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1350     }
1351
1352     if ($rule->{dport}) {
1353         eval { parse_port_name_number_or_range($rule->{dport}); };
1354         &$add_error('dport', $@) if $@;
1355         &$add_error('proto', "missing property - 'dport' requires this property")
1356             if !$rule->{proto};
1357     }
1358
1359     if ($rule->{sport}) {
1360         eval { parse_port_name_number_or_range($rule->{sport}); };
1361         &$add_error('sport', $@) if $@;
1362         &$add_error('proto', "missing property - 'sport' requires this property")
1363             if !$rule->{proto};
1364     }
1365
1366     if ($rule->{source}) {
1367         eval {
1368             my $source_ipversion = parse_address_list($rule->{source});
1369             &$set_ip_version($source_ipversion);
1370         };
1371         &$add_error('source', $@) if $@;
1372         &$check_ipset_or_alias_property('source', $ipversion);
1373     }
1374
1375     if ($rule->{dest}) {
1376         eval {
1377             my $dest_ipversion = parse_address_list($rule->{dest});
1378             &$set_ip_version($dest_ipversion);
1379         };
1380         &$add_error('dest', $@) if $@;
1381         &$check_ipset_or_alias_property('dest', $ipversion);
1382     }
1383
1384     $rule->{ipversion} = $ipversion if $ipversion;
1385
1386     if ($rule->{macro} && !$error_count) {
1387         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1388         if (my $err = $@) {
1389             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1390                 my $eh = $err->{errors};
1391                 foreach my $p (keys %$eh) {
1392                     &$add_error($p, $eh->{$p});
1393                 }
1394             } else {
1395                 &$add_error('macro', "$err");
1396             }
1397         }
1398     }
1399
1400     $rule->{errors} = $errors if $error_count;
1401
1402     return $rule;
1403 }
1404
1405 sub copy_rule_data {
1406     my ($rule, $param) = @_;
1407
1408     foreach my $k (keys %$rule_properties) {
1409         if (defined(my $v = $param->{$k})) {
1410             if ($v eq '' || $v eq '-') {
1411                 delete $rule->{$k};
1412             } else {
1413                 $rule->{$k} = $v;
1414             }
1415         }
1416     }
1417
1418     return $rule;
1419 }
1420
1421 sub rules_modify_permissions {
1422     my ($rule_env) = @_;
1423
1424     if ($rule_env eq 'host') {
1425         return {
1426             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1427         };
1428     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1429         return {
1430             check => ['perm', '/', [ 'Sys.Modify' ]],
1431         };
1432     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1433         return {
1434             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1435         }
1436     }
1437
1438     return undef;
1439 }
1440
1441 sub rules_audit_permissions {
1442     my ($rule_env) = @_;
1443
1444     if ($rule_env eq 'host') {
1445         return {
1446             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1447         };
1448     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1449         return {
1450             check => ['perm', '/', [ 'Sys.Audit' ]],
1451         };
1452     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1453         return {
1454             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1455         }
1456     }
1457
1458     return undef;
1459 }
1460
1461 # core functions
1462 my $bridge_firewall_enabled = 0;
1463
1464 sub enable_bridge_firewall {
1465
1466     return if $bridge_firewall_enabled; # only once
1467
1468     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1469     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1470
1471     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1472     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1473
1474     $bridge_firewall_enabled = 1;
1475 }
1476
1477 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1478
1479 sub iptables_restore_cmdlist {
1480     my ($cmdlist) = @_;
1481
1482     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1483 }
1484
1485 sub ip6tables_restore_cmdlist {
1486     my ($cmdlist) = @_;
1487
1488     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1489 }
1490
1491 sub ipset_restore_cmdlist {
1492     my ($cmdlist) = @_;
1493
1494     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1495 }
1496
1497 sub iptables_get_chains {
1498     my ($iptablescmd) = @_;
1499
1500     $iptablescmd = "iptables" if !$iptablescmd;
1501
1502     my $res = {};
1503
1504     # check what chains we want to track
1505     my $is_pvefw_chain = sub {
1506         my $name = shift;
1507
1508         return 1 if $name =~ m/^PVEFW-\S+$/;
1509
1510         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1511
1512         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1513
1514         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1515
1516         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1517         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1518
1519         return undef;
1520     };
1521
1522     my $table = '';
1523
1524     my $hooks = {};
1525
1526     my $parser = sub {
1527         my $line = shift;
1528
1529         return if $line =~ m/^#/;
1530         return if $line =~ m/^\s*$/;
1531
1532         if ($line =~ m/^\*(\S+)$/) {
1533             $table = $1;
1534             return;
1535         }
1536
1537         return if $table ne 'filter';
1538
1539         if ($line =~ m/^:(\S+)\s/) {
1540             my $chain = $1;
1541             return if !&$is_pvefw_chain($chain);
1542             $res->{$chain} = "unknown";
1543         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1544             my ($chain, $sig) = ($1, $2);
1545             return if !&$is_pvefw_chain($chain);
1546             $res->{$chain} = $sig;
1547         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1548             $hooks->{$1} = 1;
1549         } else {
1550             # simply ignore the rest
1551             return;
1552         }
1553     };
1554
1555     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1556
1557     return wantarray ? ($res, $hooks) : $res;
1558 }
1559
1560 sub iptables_chain_digest {
1561     my ($rules) = @_;
1562     my $digest = Digest::SHA->new('sha1');
1563     foreach my $rule (@$rules) { # order is important
1564         $digest->add($rule);
1565     }
1566     return $digest->b64digest;
1567 }
1568
1569 sub ipset_chain_digest {
1570     my ($rules) = @_;
1571
1572     my $digest = Digest::SHA->new('sha1');
1573     foreach my $rule (sort @$rules) { # note: sorted
1574         $digest->add($rule);
1575     }
1576     return $digest->b64digest;
1577 }
1578
1579 sub ipset_get_chains {
1580
1581     my $res = {};
1582     my $chains = {};
1583
1584     my $parser = sub {
1585         my $line = shift;
1586
1587         return if $line =~ m/^#/;
1588         return if $line =~ m/^\s*$/;
1589         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1590             my $chain = $1;
1591             $line =~ s/\s+$//; # delete trailing white space
1592             push @{$chains->{$chain}}, $line;
1593         } else {
1594             # simply ignore the rest
1595             return;
1596         }
1597     };
1598
1599     run_command("/sbin/ipset save", outfunc => $parser);
1600
1601     # compute digest for each chain
1602     foreach my $chain (keys %$chains) {
1603         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1604     }
1605
1606     return $res;
1607 }
1608
1609 sub ruleset_generate_cmdstr {
1610     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1611
1612     return if defined($rule->{enable}) && !$rule->{enable};
1613     return if $rule->{errors};
1614
1615     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1616
1617     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1618     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1619
1620     my @cmd = ();
1621
1622     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1623     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1624
1625     my $source = $rule->{source};
1626     my $dest = $rule->{dest};
1627
1628     if ($source) {
1629         if ($source =~ m/^\+/) {
1630             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1631                 my $name = $1;
1632                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1633                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1634                     push @cmd, "-m set --match-set ${ipset_chain} src";
1635                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1636                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1637                     push @cmd, "-m set --match-set ${ipset_chain} src";
1638                 } else {
1639                     die "no such ipset '$name'\n";
1640                 }
1641             } else {
1642                 die "invalid security group name '$source'\n";
1643             }
1644         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1645             my $alias = lc($source);
1646             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1647             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1648             die "no such alias '$source'\n" if !$e;
1649             push @cmd, "-s $e->{cidr}";
1650         } elsif ($source =~ m/\-/){
1651             push @cmd, "-m iprange --src-range $source";
1652         } else {
1653             push @cmd, "-s $source";
1654         }
1655     }
1656
1657     if ($dest) {
1658         if ($dest =~ m/^\+/) {
1659             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1660                 my $name = $1;
1661                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1662                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1663                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1664                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1665                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1666                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1667                 } else {
1668                     die "no such ipset '$name'\n";
1669                 }
1670             } else {
1671                 die "invalid security group name '$dest'\n";
1672             }
1673         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1674             my $alias = lc($dest);
1675             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1676             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1677             die "no such alias '$dest'\n" if !$e;
1678             push @cmd, "-d $e->{cidr}";
1679         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1680             push @cmd, "-m iprange --dst-range $dest";
1681         } else {
1682             push @cmd, "-d $dest";
1683         }
1684     }
1685
1686     if ($rule->{proto}) {
1687         push @cmd, "-p $rule->{proto}";
1688
1689         my $multiport = 0;
1690         $multiport++ if $nbdport > 1;
1691         $multiport++ if $nbsport > 1;
1692
1693         push @cmd, "--match multiport" if $multiport;
1694
1695         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1696             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1697
1698         if ($rule->{dport}) {
1699             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1700                 # Note: we use dport to store --icmp-type
1701                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1702                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1703             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1704                 # Note: we use dport to store --icmpv6-type
1705                 die "unknown icmpv6-type '$rule->{dport}'\n" if !defined($icmpv6_type_names->{$rule->{dport}});
1706                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1707             } else {
1708                 if ($nbdport > 1) {
1709                     if ($multiport == 2) {
1710                         push @cmd,  "--ports $rule->{dport}";
1711                     } else {
1712                         push @cmd, "--dports $rule->{dport}";
1713                     }
1714                 } else {
1715                     push @cmd, "--dport $rule->{dport}";
1716                 }
1717             }
1718         }
1719
1720         if ($rule->{sport}) {
1721             if ($nbsport > 1) {
1722                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1723             } else {
1724                 push @cmd, "--sport $rule->{sport}";
1725             }
1726         }
1727     } elsif ($rule->{dport} || $rule->{sport}) {
1728         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1729         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1730     }
1731
1732     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1733
1734     if (my $action = $rule->{action}) {
1735         $action = $actions->{$action} if defined($actions->{$action});
1736         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1737         push @cmd, $goto ? "-g $action" : "-j $action";
1738     }
1739
1740     return scalar(@cmd) ? join(' ', @cmd) : undef;
1741 }
1742
1743 sub ruleset_generate_rule {
1744     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1745
1746     my $rules;
1747
1748     if ($rule->{macro}) {
1749         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1750     } else {
1751         $rules = [ $rule ];
1752     }
1753
1754     # update all or nothing
1755
1756     my @cmds = ();
1757     foreach my $tmp (@$rules) {
1758         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1759             push @cmds, $cmdstr;
1760         }
1761     }
1762
1763     foreach my $cmdstr (@cmds) {
1764         ruleset_addrule($ruleset, $chain, $cmdstr);
1765     }
1766 }
1767
1768 sub ruleset_generate_rule_insert {
1769     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1770
1771     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1772
1773     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1774         ruleset_insertrule($ruleset, $chain, $cmdstr);
1775     }
1776 }
1777
1778 sub ruleset_create_chain {
1779     my ($ruleset, $chain) = @_;
1780
1781     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1782     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1783
1784     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1785
1786     $ruleset->{$chain} = [];
1787 }
1788
1789 sub ruleset_chain_exist {
1790     my ($ruleset, $chain) = @_;
1791
1792     return $ruleset->{$chain} ? 1 : undef;
1793 }
1794
1795 sub ruleset_addrule {
1796    my ($ruleset, $chain, $rule) = @_;
1797
1798    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1799
1800    push @{$ruleset->{$chain}}, "-A $chain $rule";
1801 }
1802
1803 sub ruleset_insertrule {
1804    my ($ruleset, $chain, $rule) = @_;
1805
1806    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1807
1808    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1809 }
1810
1811 sub get_log_rule_base {
1812     my ($chain, $vmid, $msg, $loglevel) = @_;
1813
1814     die "internal error - no log level" if !defined($loglevel);
1815
1816     $vmid = 0 if !defined($vmid);
1817
1818     # Note: we use special format for prefix to pass further
1819     # info to log daemon (VMID, LOGVELEL and CHAIN)
1820
1821     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1822 }
1823
1824 sub ruleset_addlog {
1825     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1826
1827     return if !defined($loglevel);
1828
1829     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1830
1831     $logrule = "$rule $logrule" if defined($rule);
1832
1833     ruleset_addrule($ruleset, $chain, $logrule);
1834 }
1835
1836 sub ruleset_add_chain_policy {
1837     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1838
1839     if ($policy eq 'ACCEPT') {
1840
1841         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1842                               { ACCEPT =>  $accept_action});
1843
1844     } elsif ($policy eq 'DROP') {
1845
1846         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1847
1848         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1849
1850         ruleset_addrule($ruleset, $chain, "-j DROP");
1851     } elsif ($policy eq 'REJECT') {
1852         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1853
1854         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1855
1856         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1857     } else {
1858         # should not happen
1859         die "internal error: unknown policy '$policy'";
1860     }
1861 }
1862
1863 sub ruleset_chain_add_conn_filters {
1864     my ($ruleset, $chain, $accept) = @_;
1865
1866     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1867     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1868 }
1869
1870 sub ruleset_chain_add_input_filters {
1871     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1872
1873     if ($cluster_conf->{ipset}->{blacklist}){
1874         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1875             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1876             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1877             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1878         }
1879         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1880         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1881     }
1882
1883     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1884         if ($ipversion == 4) {
1885             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1886         }
1887     }
1888
1889     if ($options->{tcpflags}) {
1890         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1891     }
1892 }
1893
1894 sub ruleset_create_vm_chain {
1895     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1896
1897     ruleset_create_chain($ruleset, $chain);
1898     my $accept = generate_nfqueue($options);
1899
1900     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1901         if ($direction eq 'OUT') {
1902             ruleset_generate_rule($ruleset, $chain, $ipversion,
1903                                   { action => 'PVEFW-SET-ACCEPT-MARK',
1904                                     proto => 'udp', sport => 68, dport => 67 });
1905         } else {
1906             ruleset_generate_rule($ruleset, $chain, $ipversion,
1907                                   { action => 'ACCEPT',
1908                                     proto => 'udp', sport => 67, dport => 68 });
1909         }
1910     }
1911
1912     if ($direction eq 'OUT') {
1913         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1914             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1915         }
1916         if ($ipfilter_ipset) {
1917             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1918         }
1919         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1920     }
1921 }
1922
1923 sub ruleset_add_group_rule {
1924     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1925
1926     my $group = $rule->{action};
1927     my $group_chain = "GROUP-$group-$direction";
1928     if(!ruleset_chain_exist($ruleset, $group_chain)){
1929         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1930     }
1931
1932     if ($direction eq 'OUT' && $rule->{iface_out}) {
1933         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1934     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1935         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1936     } else {
1937         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1938     }
1939
1940     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1941 }
1942
1943 sub ruleset_generate_vm_rules {
1944     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
1945
1946     my $lc_direction = lc($direction);
1947
1948     my $in_accept = generate_nfqueue($options);
1949
1950     foreach my $rule (@$rules) {
1951         next if $rule->{iface} && $rule->{iface} ne $netid;
1952         next if !$rule->{enable} || $rule->{errors};
1953         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
1954
1955         if ($rule->{type} eq 'group') {
1956             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1957                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
1958         } else {
1959             next if $rule->{type} ne $lc_direction;
1960             eval {
1961                 if ($direction eq 'OUT') {
1962                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1963                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1964                                           undef, $cluster_conf, $vmfw_conf);
1965                 } else {
1966                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
1967                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1968                                           undef, $cluster_conf, $vmfw_conf);
1969                 }
1970             };
1971             warn $@ if $@;
1972         }
1973     }
1974 }
1975
1976 sub generate_nfqueue {
1977     my ($options) = @_;
1978
1979     if ($options->{ips}) {
1980         my $action = "NFQUEUE";
1981         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1982             if (defined($3) && defined($1)) {
1983                 $action .= " --queue-balance $1:$3";
1984             } elsif (defined($1)) {
1985                 $action .= " --queue-num $1";
1986             }
1987         }
1988         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1989         return $action;
1990     } else {
1991         return "ACCEPT";
1992     }
1993 }
1994
1995 sub ruleset_generate_vm_ipsrules {
1996     my ($ruleset, $options, $direction, $iface) = @_;
1997
1998     if ($options->{ips} && $direction eq 'IN') {
1999         my $nfqueue = generate_nfqueue($options);
2000
2001         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2002             ruleset_create_chain($ruleset, "PVEFW-IPS");
2003         }
2004
2005         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2006     }
2007 }
2008
2009 sub generate_venet_rules_direction {
2010     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction, $ipversion) = @_;
2011
2012     my $lc_direction = lc($direction);
2013
2014     my $rules = $vmfw_conf->{rules};
2015
2016     my $options = $vmfw_conf->{options};
2017     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2018
2019     my $chain = "venet0-$vmid-$direction";
2020
2021     ruleset_create_vm_chain($ruleset, $chain, $ipversion, $options, undef, undef, $direction);
2022
2023     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction, undef, $ipversion);
2024
2025     # implement policy
2026     my $policy;
2027
2028     if ($direction eq 'OUT') {
2029         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2030     } else {
2031         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2032     }
2033
2034     my $accept = generate_nfqueue($options);
2035     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2036     ruleset_add_chain_policy($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2037
2038     if ($direction eq 'OUT') {
2039         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", $ipversion, {
2040             action => $chain,
2041             source => $ip,
2042             iface_in => 'venet0'});
2043     } else {
2044         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", $ipversion, {
2045             action => $chain,
2046             dest => $ip,
2047             iface_out => 'venet0'});
2048     }
2049 }
2050
2051 sub generate_tap_rules_direction {
2052     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2053
2054     my $lc_direction = lc($direction);
2055
2056     my $rules = $vmfw_conf->{rules};
2057
2058     my $options = $vmfw_conf->{options};
2059     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2060
2061     my $tapchain = "$iface-$direction";
2062
2063     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2064     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2065         if $vmfw_conf->{ipset}->{$ipfilter_name};
2066
2067     # create chain with mac and ip filter
2068     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2069
2070     if ($options->{enable}) {
2071         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2072
2073         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2074
2075         # implement policy
2076         my $policy;
2077
2078         if ($direction eq 'OUT') {
2079             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2080         } else {
2081         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2082         }
2083
2084         my $accept = generate_nfqueue($options);
2085         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2086         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2087     } else {
2088         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2089         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2090     }
2091
2092     # plug the tap chain to bridge chain
2093     if ($direction eq 'IN') {
2094         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2095                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2096     } else {
2097         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2098                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2099     }
2100 }
2101
2102 sub enable_host_firewall {
2103     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2104
2105     my $options = $hostfw_conf->{options};
2106     my $cluster_options = $cluster_conf->{options};
2107     my $rules = $hostfw_conf->{rules};
2108     my $cluster_rules = $cluster_conf->{rules};
2109
2110     # host inbound firewall
2111     my $chain = "PVEFW-HOST-IN";
2112     ruleset_create_chain($ruleset, $chain);
2113
2114     my $loglevel = get_option_log_level($options, "log_level_in");
2115
2116     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2117
2118     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2119     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2120
2121     # we use RETURN because we need to check also tap rules
2122     my $accept_action = 'RETURN';
2123
2124     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2125
2126     # add host rules first, so that cluster wide rules can be overwritten
2127     foreach my $rule (@$rules, @$cluster_rules) {
2128         next if !$rule->{enable} || $rule->{errors};
2129         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2130
2131         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2132
2133         eval {
2134             if ($rule->{type} eq 'group') {
2135                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2136             } elsif ($rule->{type} eq 'in') {
2137                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2138                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2139                                       undef, $cluster_conf, $hostfw_conf);
2140             }
2141         };
2142         warn $@ if $@;
2143         delete $rule->{iface_in};
2144     }
2145
2146     # allow standard traffic for management ipset (includes cluster network)
2147     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2148     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2149     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2150     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2151     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2152     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2153
2154     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2155     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2156
2157     # corosync
2158     if ($localnet && ($ipversion == $localnet_ver)) {
2159         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2160         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2161         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2162     }
2163
2164     # implement input policy
2165     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2166     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2167
2168     # host outbound firewall
2169     $chain = "PVEFW-HOST-OUT";
2170     ruleset_create_chain($ruleset, $chain);
2171
2172     $loglevel = get_option_log_level($options, "log_level_out");
2173
2174     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2175
2176     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2177
2178     # we use RETURN because we may want to check other thigs later
2179     $accept_action = 'RETURN';
2180
2181     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2182
2183     # add host rules first, so that cluster wide rules can be overwritten
2184     foreach my $rule (@$rules, @$cluster_rules) {
2185         next if !$rule->{enable} || $rule->{errors};
2186         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2187
2188         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2189         eval {
2190             if ($rule->{type} eq 'group') {
2191                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2192             } elsif ($rule->{type} eq 'out') {
2193                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2194                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2195                                       undef, $cluster_conf, $hostfw_conf);
2196             }
2197         };
2198         warn $@ if $@;
2199         delete $rule->{iface_out};
2200     }
2201
2202     # allow standard traffic on cluster network
2203     if ($localnet && ($ipversion == $localnet_ver)) {
2204         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2205         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2206         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2207         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2208
2209         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2210         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2211         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2212     }
2213
2214     # implement output policy
2215     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2216     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2217
2218     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2219     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2220 }
2221
2222 sub generate_group_rules {
2223     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2224
2225     my $rules = $cluster_conf->{groups}->{$group};
2226
2227     if (!$rules) {
2228         warn "no such security group '$group'\n";
2229         $rules = []; # create empty chain
2230     }
2231
2232     my $chain = "GROUP-${group}-IN";
2233
2234     ruleset_create_chain($ruleset, $chain);
2235     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2236
2237     foreach my $rule (@$rules) {
2238         next if $rule->{type} ne 'in';
2239         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2240         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2241                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2242                               undef, $cluster_conf);
2243     }
2244
2245     $chain = "GROUP-${group}-OUT";
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 'out';
2252         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2253         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2254         # check also other tap rules later
2255         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2256                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2257                               undef, $cluster_conf);
2258     }
2259 }
2260
2261 my $MAX_NETS = 32;
2262 my $valid_netdev_names = {};
2263 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2264     $valid_netdev_names->{"net$i"} = 1;
2265 }
2266
2267 sub parse_fw_rule {
2268     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2269
2270     my $orig_line = $line;
2271
2272     my $rule = {};
2273
2274     # we can add single line comments to the end of the rule
2275     if ($line =~ s/#\s*(.*?)\s*$//) {
2276         $rule->{comment} = decode('utf8', $1);
2277     }
2278
2279     # we can disable a rule when prefixed with '|'
2280
2281     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2282
2283     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2284         die "unable to parse rule: $line\n";
2285
2286     $rule->{type} = lc($1);
2287     $rule->{action} = $2;
2288
2289     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2290         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2291             $rule->{macro} = $1;
2292             $rule->{action} = $2;
2293         }
2294     }
2295
2296     while (length($line)) {
2297         if ($line =~ s/^-i (\S+)\s*//) {
2298             $rule->{iface} = $1;
2299             next;
2300         }
2301
2302         last if $rule->{type} eq 'group';
2303
2304         if ($line =~ s/^-p (\S+)\s*//) {
2305             $rule->{proto} = $1;
2306             next;
2307         }
2308
2309         if ($line =~ s/^-dport (\S+)\s*//) {
2310             $rule->{dport} = $1;
2311             next;
2312         }
2313
2314         if ($line =~ s/^-sport (\S+)\s*//) {
2315             $rule->{sport} = $1;
2316             next;
2317         }
2318         if ($line =~ s/^-source (\S+)\s*//) {
2319             $rule->{source} = $1;
2320             next;
2321         }
2322         if ($line =~ s/^-dest (\S+)\s*//) {
2323             $rule->{dest} = $1;
2324             next;
2325         }
2326
2327         last;
2328     }
2329
2330     die "unable to parse rule parameters: $line\n" if length($line);
2331
2332     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2333     if ($verbose && $rule->{errors}) {
2334         warn "$prefix - errors in rule parameters: $orig_line\n";
2335         foreach my $p (keys %{$rule->{errors}}) {
2336             warn "  $p: $rule->{errors}->{$p}\n";
2337         }
2338     }
2339
2340     return $rule;
2341 }
2342
2343 sub parse_vmfw_option {
2344     my ($line) = @_;
2345
2346     my ($opt, $value);
2347
2348     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2349
2350     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2351         $opt = lc($1);
2352         $value = int($2);
2353     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2354         $opt = lc($1);
2355         $value = $2 ? lc($3) : '';
2356     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2357         $opt = lc($1);
2358         $value = uc($3);
2359     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2360         $opt = lc($1);
2361         $value = $2;
2362     } else {
2363         die "can't parse option '$line'\n"
2364     }
2365
2366     return ($opt, $value);
2367 }
2368
2369 sub parse_hostfw_option {
2370     my ($line) = @_;
2371
2372     my ($opt, $value);
2373
2374     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2375
2376     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2377         $opt = lc($1);
2378         $value = int($2);
2379     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2380         $opt = lc($1);
2381         $value = $2 ? lc($3) : '';
2382     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2383         $opt = lc($1);
2384         $value = int($2);
2385     } else {
2386         die "can't parse option '$line'\n"
2387     }
2388
2389     return ($opt, $value);
2390 }
2391
2392 sub parse_clusterfw_option {
2393     my ($line) = @_;
2394
2395     my ($opt, $value);
2396
2397     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2398         $opt = lc($1);
2399         $value = int($2);
2400         if (($value > 1) && ((time() - $value) > 60)) {
2401             $value = 0
2402         }
2403     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2404         $opt = lc($1);
2405         $value = uc($3);
2406     } else {
2407         die "can't parse option '$line'\n"
2408     }
2409
2410     return ($opt, $value);
2411 }
2412
2413 sub resolve_alias {
2414     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2415
2416     my $alias = lc($cidr);
2417     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2418     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2419
2420     die "no such alias '$cidr'\n" if !$e;;
2421
2422     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2423 }
2424
2425 sub parse_ip_or_cidr {
2426     my ($cidr) = @_;
2427
2428     my $ipversion;
2429
2430     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2431         $cidr =~ s|/128$||;
2432         $ipversion = 6;
2433     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2434         $cidr =~ s|/32$||;
2435         $ipversion = 4;
2436     } else {
2437         die "value does not look like a valid IP address or CIDR network\n";
2438     }
2439
2440     return wantarray ? ($cidr, $ipversion) : $cidr;
2441 }
2442
2443 sub parse_alias {
2444     my ($line) = @_;
2445
2446     # we can add single line comments to the end of the line
2447     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2448
2449     if ($line =~ m/^(\S+)\s(\S+)$/) {
2450         my ($name, $cidr) = ($1, $2);
2451         my $ipversion;
2452
2453         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2454
2455         my $data = {
2456             name => $name,
2457             cidr => $cidr,
2458             ipversion => $ipversion,
2459         };
2460         $data->{comment} = $comment  if $comment;
2461         return $data;
2462     }
2463
2464     return undef;
2465 }
2466
2467 sub generic_fw_config_parser {
2468     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2469
2470     my $section;
2471     my $group;
2472
2473     my $res = $empty_conf;
2474
2475     while (defined(my $line = <$fh>)) {
2476         next if $line =~ m/^#/;
2477         next if $line =~ m/^\s*$/;
2478
2479         chomp $line;
2480
2481         my $linenr = $fh->input_line_number();
2482         my $prefix = "$filename (line $linenr)";
2483
2484         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2485             $section = 'options';
2486             next;
2487         }
2488
2489         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2490             $section = 'aliases';
2491             next;
2492         }
2493
2494         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2495             $section = 'groups';
2496             $group = lc($1);
2497             my $comment = $2;
2498             eval {
2499                 die "security group name too long\n" if length($group) > $max_group_name_length;
2500                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2501             };
2502             if (my $err = $@) {
2503                 ($section, $group, $comment) = undef;
2504                 warn "$prefix: $err";
2505                 next;
2506             }
2507
2508             $res->{$section}->{$group} = [];
2509             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2510                 if $comment;
2511             next;
2512         }
2513
2514         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2515             $section = 'rules';
2516             next;
2517         }
2518
2519         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2520             $section = 'ipset';
2521             $group = lc($1);
2522             my $comment = $2;
2523             eval {
2524                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2525                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2526             };
2527             if (my $err = $@) {
2528                 ($section, $group, $comment) = undef;
2529                 warn "$prefix: $err";
2530                 next;
2531             }
2532
2533             $res->{$section}->{$group} = [];
2534             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2535                 if $comment;
2536             next;
2537         }
2538
2539         if (!$section) {
2540             warn "$prefix: skip line - no section\n";
2541             next;
2542         }
2543
2544         if ($section eq 'options') {
2545             eval {
2546                 my ($opt, $value);
2547                 if ($rule_env eq 'cluster') {
2548                     ($opt, $value) = parse_clusterfw_option($line);
2549                 } elsif ($rule_env eq 'host') {
2550                     ($opt, $value) = parse_hostfw_option($line);
2551                 } else {
2552                     ($opt, $value) = parse_vmfw_option($line);
2553                 }
2554                 $res->{options}->{$opt} = $value;
2555             };
2556             warn "$prefix: $@" if $@;
2557         } elsif ($section eq 'aliases') {
2558             eval {
2559                 my $data = parse_alias($line);
2560                 $res->{aliases}->{lc($data->{name})} = $data;
2561             };
2562             warn "$prefix: $@" if $@;
2563         } elsif ($section eq 'rules') {
2564             my $rule;
2565             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2566             if (my $err = $@) {
2567                 warn "$prefix: $err";
2568                 next;
2569             }
2570             push @{$res->{$section}}, $rule;
2571         } elsif ($section eq 'groups') {
2572             my $rule;
2573             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2574             if (my $err = $@) {
2575                 warn "$prefix: $err";
2576                 next;
2577             }
2578             push @{$res->{$section}->{$group}}, $rule;
2579         } elsif ($section eq 'ipset') {
2580             # we can add single line comments to the end of the rule
2581             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2582
2583             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2584             my $nomatch = $1;
2585             my $cidr = $2;
2586             my $errors;
2587
2588             if ($nomatch && !$feature_ipset_nomatch) {
2589                 $errors->{nomatch} = "nomatch not supported by kernel";
2590             }
2591
2592             eval {
2593                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2594                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2595                 } else {
2596                     $cidr = parse_ip_or_cidr($cidr);
2597                 }
2598             };
2599             if (my $err = $@) {
2600                 chomp $err;
2601                 $errors->{cidr} = $err;
2602             }
2603
2604             my $entry = { cidr => $cidr };
2605             $entry->{nomatch} = 1 if $nomatch;
2606             $entry->{comment} = $comment if $comment;
2607             $entry->{errors} =  $errors if $errors;
2608
2609             if ($verbose && $errors) {
2610                 warn "$prefix - errors in ipset '$group': $line\n";
2611                 foreach my $p (keys %{$errors}) {
2612                     warn "  $p: $errors->{$p}\n";
2613                 }
2614             }
2615
2616             push @{$res->{$section}->{$group}}, $entry;
2617         } else {
2618             warn "$prefix: skip line - unknown section\n";
2619             next;
2620         }
2621     }
2622
2623     return $res;
2624 }
2625
2626 sub parse_hostfw_config {
2627     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2628
2629     my $empty_conf = { rules => [], options => {}};
2630
2631     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2632 }
2633
2634 sub parse_vmfw_config {
2635     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2636
2637     my $empty_conf = {
2638         rules => [],
2639         options => {},
2640         aliases => {},
2641         ipset => {} ,
2642         ipset_comments => {},
2643     };
2644
2645     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2646 }
2647
2648 sub parse_clusterfw_config {
2649     my ($filename, $fh, $verbose) = @_;
2650
2651     my $section;
2652     my $group;
2653
2654     my $empty_conf = {
2655         rules => [],
2656         options => {},
2657         aliases => {},
2658         groups => {},
2659         group_comments => {},
2660         ipset => {} ,
2661         ipset_comments => {},
2662     };
2663
2664     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2665 }
2666
2667 sub run_locked {
2668     my ($code, @param) = @_;
2669
2670     my $timeout = 10;
2671
2672     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2673
2674     die $@ if $@;
2675
2676     return $res;
2677 }
2678
2679 sub read_local_vm_config {
2680
2681     my $openvz = {};
2682     my $qemu = {};
2683
2684     my $vmdata = { openvz => $openvz, qemu => $qemu };
2685
2686     my $vmlist = PVE::Cluster::get_vmlist();
2687     return $vmdata if !$vmlist || !$vmlist->{ids};
2688     my $ids = $vmlist->{ids};
2689
2690     foreach my $vmid (keys %$ids) {
2691         next if !$vmid; # skip VE0
2692         my $d = $ids->{$vmid};
2693         next if !$d->{node} || $d->{node} ne $nodename;
2694         next if !$d->{type};
2695         if ($d->{type} eq 'openvz') {
2696             if ($have_pve_manager) {
2697                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2698                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2699                     $openvz->{$vmid} = $conf;
2700                 }
2701             }
2702         } elsif ($d->{type} eq 'qemu') {
2703             if ($have_qemu_server) {
2704                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2705                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2706                     $qemu->{$vmid} = $conf;
2707                 }
2708             }
2709         }
2710     }
2711
2712     return $vmdata;
2713 };
2714
2715 sub load_vmfw_conf {
2716     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2717
2718     my $vmfw_conf = {};
2719
2720     $dir = $pvefw_conf_dir if !defined($dir);
2721
2722     my $filename = "$dir/$vmid.fw";
2723     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2724         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2725         $vmfw_conf->{vmid} = $vmid;
2726     }
2727
2728     return $vmfw_conf;
2729 }
2730
2731 my $format_rules = sub {
2732     my ($rules, $allow_iface) = @_;
2733
2734     my $raw = '';
2735
2736     foreach my $rule (@$rules) {
2737         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2738             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2739             $raw .= uc($rule->{type});
2740             if ($rule->{macro}) {
2741                 $raw .= " $rule->{macro}($rule->{action})";
2742             } else {
2743                 $raw .= " " . $rule->{action};
2744             }
2745             if ($allow_iface && $rule->{iface}) {
2746                 $raw .= " -i $rule->{iface}";
2747             }
2748
2749             if ($rule->{type} ne  'group')  {
2750                 $raw .= " -source $rule->{source}" if $rule->{source};
2751                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2752                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2753                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2754                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2755             }
2756
2757             $raw .= " # " . encode('utf8', $rule->{comment})
2758                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2759             $raw .= "\n";
2760         } else {
2761             die "unknown rule type '$rule->{type}'";
2762         }
2763     }
2764
2765     return $raw;
2766 };
2767
2768 my $format_options = sub {
2769     my ($options) = @_;
2770
2771     my $raw = '';
2772
2773     $raw .= "[OPTIONS]\n\n";
2774     foreach my $opt (keys %$options) {
2775         $raw .= "$opt: $options->{$opt}\n";
2776     }
2777     $raw .= "\n";
2778
2779     return $raw;
2780 };
2781
2782 my $format_aliases = sub {
2783     my ($aliases) = @_;
2784
2785     my $raw = '';
2786
2787     $raw .= "[ALIASES]\n\n";
2788     foreach my $k (keys %$aliases) {
2789         my $e = $aliases->{$k};
2790         $raw .= "$e->{name} $e->{cidr}";
2791         $raw .= " # " . encode('utf8', $e->{comment})
2792             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2793         $raw .= "\n";
2794     }
2795     $raw .= "\n";
2796
2797     return $raw;
2798 };
2799
2800 my $format_ipsets = sub {
2801     my ($fw_conf) = @_;
2802
2803     my $raw = '';
2804
2805     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2806         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2807             my $utf8comment = encode('utf8', $comment);
2808             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2809         } else {
2810             $raw .= "[IPSET $ipset]\n\n";
2811         }
2812         my $options = $fw_conf->{ipset}->{$ipset};
2813
2814         my $nethash = {};
2815         foreach my $entry (@$options) {
2816             $nethash->{$entry->{cidr}} = $entry;
2817         }
2818
2819         foreach my $cidr (sort keys %$nethash) {
2820             my $entry = $nethash->{$cidr};
2821             my $line = $entry->{nomatch} ? '!' : '';
2822             $line .= $entry->{cidr};
2823             $line .= " # " . encode('utf8', $entry->{comment})
2824                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2825             $raw .= "$line\n";
2826         }
2827
2828         $raw .= "\n";
2829     }
2830
2831     return $raw;
2832 };
2833
2834 sub save_vmfw_conf {
2835     my ($vmid, $vmfw_conf) = @_;
2836
2837     my $raw = '';
2838
2839     my $options = $vmfw_conf->{options};
2840     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2841
2842     my $aliases = $vmfw_conf->{aliases};
2843     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2844
2845     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2846
2847     my $rules = $vmfw_conf->{rules} || [];
2848     if ($rules && scalar(@$rules)) {
2849         $raw .= "[RULES]\n\n";
2850         $raw .= &$format_rules($rules, 1);
2851         $raw .= "\n";
2852     }
2853
2854     mkdir $pvefw_conf_dir;
2855
2856     my $filename = "$pvefw_conf_dir/$vmid.fw";
2857     PVE::Tools::file_set_contents($filename, $raw);
2858 }
2859
2860 sub read_vm_firewall_configs {
2861     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2862
2863     my $vmfw_configs = {};
2864
2865     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2866         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2867         next if !$vmfw_conf->{options}; # skip if file does not exists
2868         $vmfw_configs->{$vmid} = $vmfw_conf;
2869     }
2870     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2871         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2872         next if !$vmfw_conf->{options}; # skip if file does not exists
2873         $vmfw_configs->{$vmid} = $vmfw_conf;
2874     }
2875
2876     return $vmfw_configs;
2877 }
2878
2879 sub get_option_log_level {
2880     my ($options, $k) = @_;
2881
2882     my $v = $options->{$k};
2883     $v = $default_log_level if !defined($v);
2884
2885     return undef if $v eq '' || $v eq 'nolog';
2886
2887     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2888
2889     return $v if ($v >= 0) && ($v <= 7);
2890
2891     warn "unknown log level ($k = '$v')\n";
2892
2893     return undef;
2894 }
2895
2896 sub generate_std_chains {
2897     my ($ruleset, $options, $ipversion) = @_;
2898
2899     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2900
2901     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2902
2903     my $chain;
2904
2905     if ($ipversion == 4) {
2906         # same as shorewall smurflog.
2907         $chain = 'PVEFW-smurflog';
2908         $std_chains->{$chain} = [];
2909
2910         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2911         push @{$std_chains->{$chain}}, "-j DROP";
2912     }
2913
2914     # same as shorewall logflags action.
2915     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2916     $chain = 'PVEFW-logflags';
2917     $std_chains->{$chain} = [];
2918
2919     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2920     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2921     push @{$std_chains->{$chain}}, "-j DROP";
2922
2923     foreach my $chain (keys %$std_chains) {
2924         ruleset_create_chain($ruleset, $chain);
2925         foreach my $rule (@{$std_chains->{$chain}}) {
2926             if (ref($rule)) {
2927                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2928             } else {
2929                 ruleset_addrule($ruleset, $chain, $rule);
2930             }
2931         }
2932     }
2933 }
2934
2935 sub generate_ipset_chains {
2936     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_; #fixme
2937
2938     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2939
2940         my $options = $fw_conf->{ipset}->{$ipset};
2941
2942         # remove duplicates
2943         my $nethash = {};
2944         foreach my $entry (@$options) {
2945             next if $entry->{errors}; # skip entries with errors
2946             eval {
2947                 my ($cidr, $ver);
2948                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
2949                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2950                 } else {
2951                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
2952                 }
2953                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
2954                 if ($ver == 6) {
2955                     $cidr = lc(Net::IP::ip_compress_address($cidr, 6));
2956                     $cidr =~ s|/128$||;
2957                 } else {
2958                     $cidr =~ s|/32$||;
2959                 }
2960
2961                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2962             };
2963             warn $@ if $@;
2964         }
2965
2966         foreach my $ipversion (4, 6) {
2967             my $data = $nethash->{$ipversion};
2968
2969             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
2970
2971             my $hashsize = scalar(@$options);
2972             if ($hashsize <= 64) {
2973                 $hashsize = 64;
2974             } else {
2975                 $hashsize = round_powerof2($hashsize);
2976             }
2977
2978             my $family = $ipversion == "6" ? "inet6" : "inet";
2979
2980             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
2981
2982             foreach my $cidr (sort keys %$data) {
2983                 my $entry = $data->{$cidr};
2984
2985                 my $cmd = "add $name $cidr";
2986                 if ($entry->{nomatch}) {
2987                     if ($feature_ipset_nomatch) {
2988                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2989                     } else {
2990                         warn "ignore !$cidr - nomatch not supported by kernel\n";
2991                     }
2992                 } else {
2993                     push @{$ipset_ruleset->{$name}}, $cmd;
2994                 }
2995             }
2996         }
2997     }
2998 }
2999
3000 sub round_powerof2 {
3001     my ($int) = @_;
3002
3003     $int--;
3004     $int |= $int >> $_ foreach (1,2,4,8,16);
3005     return ++$int;
3006 }
3007
3008 sub load_clusterfw_conf {
3009     my ($filename, $verbose) = @_;
3010
3011     $filename = $clusterfw_conf_filename if !defined($filename);
3012
3013     my $cluster_conf = {};
3014     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3015         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3016     }
3017
3018     return $cluster_conf;
3019 }
3020
3021 sub save_clusterfw_conf {
3022     my ($cluster_conf) = @_;
3023
3024     my $raw = '';
3025
3026     my $options = $cluster_conf->{options};
3027     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3028
3029     my $aliases = $cluster_conf->{aliases};
3030     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3031
3032     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3033
3034     my $rules = $cluster_conf->{rules};
3035     if ($rules && scalar(@$rules)) {
3036         $raw .= "[RULES]\n\n";
3037         $raw .= &$format_rules($rules, 1);
3038         $raw .= "\n";
3039     }
3040
3041     if ($cluster_conf->{groups}) {
3042         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3043             my $rules = $cluster_conf->{groups}->{$group};
3044             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3045                 my $utf8comment = encode('utf8', $comment);
3046                 $raw .= "[group $group] # $utf8comment\n\n";
3047             } else {
3048                 $raw .= "[group $group]\n\n";
3049             }
3050
3051             $raw .= &$format_rules($rules, 0);
3052             $raw .= "\n";
3053         }
3054     }
3055
3056     mkdir $pvefw_conf_dir;
3057     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3058 }
3059
3060 sub load_hostfw_conf {
3061     my ($cluster_conf, $filename, $verbose) = @_;
3062
3063     $filename = $hostfw_conf_filename if !defined($filename);
3064
3065     my $hostfw_conf = {};
3066     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3067         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3068     }
3069     return $hostfw_conf;
3070 }
3071
3072 sub save_hostfw_conf {
3073     my ($hostfw_conf) = @_;
3074
3075     my $raw = '';
3076
3077     my $options = $hostfw_conf->{options};
3078     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3079
3080     my $rules = $hostfw_conf->{rules};
3081     if ($rules && scalar(@$rules)) {
3082         $raw .= "[RULES]\n\n";
3083         $raw .= &$format_rules($rules, 1);
3084         $raw .= "\n";
3085     }
3086
3087     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3088 }
3089
3090 sub compile {
3091     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3092
3093     my $vmfw_configs;
3094
3095     if ($vmdata) { # test mode
3096         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3097         my $filename = "$testdir/cluster.fw";
3098         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3099
3100         $filename = "$testdir/host.fw";
3101         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3102
3103         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3104     } else { # normal operation
3105         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3106
3107         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3108
3109         $vmdata = read_local_vm_config();
3110         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3111     }
3112
3113     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3114     my ($rulesetv6) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3115
3116     return ($ruleset, $ipset_ruleset, $rulesetv6);
3117 }
3118
3119 sub compile_iptables_filter {
3120     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3121
3122     $cluster_conf->{ipset}->{venet0} = [];
3123     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0', $ipversion);
3124
3125     my $localnet;
3126     if ($cluster_conf->{aliases}->{local_network}) {
3127         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3128     } else {
3129         my $localnet_ver;
3130         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3131
3132         $cluster_conf->{aliases}->{local_network} = {
3133             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3134     }
3135
3136     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3137
3138     return ({}, {}) if !$cluster_conf->{options}->{enable};
3139
3140     my $ruleset = {};
3141
3142     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3143     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3144
3145     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3146
3147     my $hostfw_options = $hostfw_conf->{options} || {};
3148
3149     # fixme: what log level should we use here?
3150     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3151
3152     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3153
3154
3155     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
3156     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3157     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
3158
3159     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3160     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3161
3162     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3163
3164     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3165     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3166
3167     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
3168     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3169
3170     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3171
3172     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3173
3174     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3175
3176     my $ipset_ruleset = {};
3177
3178     if ($hostfw_enable) {
3179         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3180         warn $@ if $@; # just to be sure - should not happen
3181     }
3182
3183     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
3184
3185     # generate firewall rules for QEMU VMs
3186     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3187         eval {
3188             my $conf = $vmdata->{qemu}->{$vmid};
3189             my $vmfw_conf = $vmfw_configs->{$vmid};
3190             return if !$vmfw_conf;
3191
3192             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3193
3194             foreach my $netid (keys %$conf) {
3195                 next if $netid !~ m/^net(\d+)$/;
3196                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3197                 next if !$net->{firewall};
3198                 my $iface = "tap${vmid}i$1";
3199
3200                 my $macaddr = $net->{macaddr};
3201                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3202                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3203                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3204                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3205             }
3206         };
3207         warn $@ if $@; # just to be sure - should not happen
3208     }
3209
3210     # generate firewall rules for OpenVZ containers
3211     foreach my $vmid (keys %{$vmdata->{openvz}}) {
3212         eval {
3213             my $conf = $vmdata->{openvz}->{$vmid};
3214
3215             my $vmfw_conf = $vmfw_configs->{$vmid};
3216             return if !$vmfw_conf;
3217
3218             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
3219
3220             if ($vmfw_conf->{options}->{enable}) {
3221                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
3222                     my $ip = $conf->{ip_address}->{value};
3223                     $ip =~ s/\s+/,/g;
3224
3225                     my @ips = ();
3226
3227                     foreach my $singleip (split(',', $ip)) {
3228                         my $singleip_ver = parse_address_list($singleip); # make sure we have a valid $ip list
3229                         push @{$cluster_conf->{ipset}->{venet0}}, { cidr => $singleip };
3230                         push @ips, $singleip if $singleip_ver == $ipversion;
3231                     }
3232
3233                     if (scalar(@ips)) {
3234                         my $ip_list = join(',', @ips);
3235                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'IN', $ipversion);
3236                         generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip_list, 'OUT', $ipversion);
3237                     }
3238                 }
3239             }
3240
3241             if ($conf->{netif} && $conf->{netif}->{value}) {
3242                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
3243                 foreach my $netid (keys %$netif) {
3244                     my $d = $netif->{$netid};
3245                     my $bridge = $d->{bridge};
3246                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
3247                     my $macaddr = $d->{mac};
3248                     my $iface = $d->{host_ifname};
3249                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3250                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3251                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3252                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3253                 }
3254             }
3255         };
3256         warn $@ if $@; # just to be sure - should not happen
3257     }
3258
3259     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3260         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3261     }
3262
3263     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3264
3265     return ($ruleset, $ipset_ruleset);
3266 }
3267
3268 sub get_ruleset_status {
3269     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3270
3271     my $statushash = {};
3272
3273     foreach my $chain (sort keys %$ruleset) {
3274         my $sig = &$digest_fn($ruleset->{$chain});
3275
3276         $statushash->{$chain}->{sig} = $sig;
3277
3278         my $oldsig = $active_chains->{$chain};
3279         if (!defined($oldsig)) {
3280             $statushash->{$chain}->{action} = 'create';
3281         } else {
3282             if ($oldsig eq $sig) {
3283                 $statushash->{$chain}->{action} = 'exists';
3284             } else {
3285                 $statushash->{$chain}->{action} = 'update';
3286             }
3287         }
3288         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3289         foreach my $cmd (@{$ruleset->{$chain}}) {
3290             print "\t$cmd\n" if $verbose;
3291         }
3292     }
3293
3294     foreach my $chain (sort keys %$active_chains) {
3295         if (!defined($ruleset->{$chain})) {
3296             my $sig = $active_chains->{$chain};
3297             $statushash->{$chain}->{action} = 'delete';
3298             $statushash->{$chain}->{sig} = $sig;
3299             print "delete $chain ($sig)\n" if $verbose;
3300         }
3301     }
3302
3303     return $statushash;
3304 }
3305
3306 sub print_sig_rule {
3307     my ($chain, $sig) = @_;
3308
3309     # We just use this to store a SHA1 checksum used to detect changes
3310     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3311 }
3312
3313 sub get_ruleset_cmdlist {
3314     my ($ruleset, $verbose, $iptablescmd) = @_;
3315
3316     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3317
3318     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3319     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3320
3321     # create missing chains first
3322     foreach my $chain (sort keys %$ruleset) {
3323         my $stat = $statushash->{$chain};
3324         die "internal error" if !$stat;
3325         next if $stat->{action} ne 'create';
3326
3327         $cmdlist .= ":$chain - [0:0]\n";
3328     }
3329
3330     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3331         my $chain = "PVEFW-$h";
3332         if ($ruleset->{$chain} && !$hooks->{$h}) {
3333             $cmdlist .= "-A $h -j $chain\n";
3334         }
3335     }
3336
3337     foreach my $chain (sort keys %$ruleset) {
3338         my $stat = $statushash->{$chain};
3339         die "internal error" if !$stat;
3340
3341         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3342             $cmdlist .= "-F $chain\n";
3343             foreach my $cmd (@{$ruleset->{$chain}}) {
3344                 $cmdlist .= "$cmd\n";
3345             }
3346             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3347         } elsif ($stat->{action} eq 'delete') {
3348             die "internal error"; # this should not happen
3349         } elsif ($stat->{action} eq 'exists') {
3350             # do nothing
3351         } else {
3352             die "internal error - unknown status '$stat->{action}'";
3353         }
3354     }
3355
3356     foreach my $chain (keys %$statushash) {
3357         next if $statushash->{$chain}->{action} ne 'delete';
3358         $cmdlist .= "-F $chain\n";
3359     }
3360     foreach my $chain (keys %$statushash) {
3361         next if $statushash->{$chain}->{action} ne 'delete';
3362         next if $chain eq 'PVEFW-INPUT';
3363         next if $chain eq 'PVEFW-OUTPUT';
3364         next if $chain eq 'PVEFW-FORWARD';
3365         $cmdlist .= "-X $chain\n";
3366     }
3367
3368     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3369
3370     $cmdlist .= "COMMIT\n";
3371
3372     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3373 }
3374
3375 sub get_ipset_cmdlist {
3376     my ($ruleset, $verbose) = @_;
3377
3378     my $cmdlist = "";
3379
3380     my $delete_cmdlist = "";
3381
3382     my $active_chains = ipset_get_chains();
3383     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3384
3385     # remove stale _swap chains
3386     foreach my $chain (keys %$active_chains) {
3387         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3388             $cmdlist .= "destroy $chain\n";
3389         }
3390     }
3391
3392     foreach my $chain (keys %$ruleset) {
3393         my $stat = $statushash->{$chain};
3394         die "internal error" if !$stat;
3395
3396         if ($stat->{action} eq 'create') {
3397             foreach my $cmd (@{$ruleset->{$chain}}) {
3398                 $cmdlist .= "$cmd\n";
3399             }
3400         }
3401     }
3402
3403     foreach my $chain (keys %$ruleset) {
3404         my $stat = $statushash->{$chain};
3405         die "internal error" if !$stat;
3406
3407         if ($stat->{action} eq 'update') {
3408             my $chain_swap = $chain."_swap";
3409
3410             foreach my $cmd (@{$ruleset->{$chain}}) {
3411                 $cmd =~ s/$chain/$chain_swap/;
3412                 $cmdlist .= "$cmd\n";
3413             }
3414             $cmdlist .= "swap $chain_swap $chain\n";
3415             $cmdlist .= "flush $chain_swap\n";
3416             $cmdlist .= "destroy $chain_swap\n";
3417         }
3418     }
3419
3420      # the remove unused chains
3421     foreach my $chain (keys %$statushash) {
3422         next if $statushash->{$chain}->{action} ne 'delete';
3423
3424         $delete_cmdlist .= "flush $chain\n";
3425         $delete_cmdlist .= "destroy $chain\n";
3426     }
3427
3428     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3429
3430     return ($cmdlist, $delete_cmdlist, $changes);
3431 }
3432
3433 sub apply_ruleset {
3434     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3435
3436     enable_bridge_firewall();
3437
3438     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3439         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3440
3441     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3442     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3443
3444     if ($verbose) {
3445         if ($ipset_changes) {
3446             print "ipset changes:\n";
3447             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3448             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3449         }
3450
3451         if ($changes) {
3452             print "iptables changes:\n";
3453             print $cmdlist;
3454         }
3455
3456         if ($changesv6) {
3457             print "ip6tables changes:\n";
3458             print $cmdlistv6;
3459         }
3460     }
3461
3462     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3463     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3464
3465     ipset_restore_cmdlist($ipset_create_cmdlist);
3466
3467     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3468     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3469
3470     iptables_restore_cmdlist($cmdlist);
3471
3472     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3473     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3474
3475     ip6tables_restore_cmdlist($cmdlistv6);
3476
3477     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3478     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3479
3480     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3481
3482     # test: re-read status and check if everything is up to date
3483     my $active_chains = iptables_get_chains();
3484     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3485
3486     my $errors;
3487     foreach my $chain (sort keys %$ruleset) {
3488         my $stat = $statushash->{$chain};
3489         if ($stat->{action} ne 'exists') {
3490             warn "unable to update chain '$chain'\n";
3491             $errors = 1;
3492         }
3493     }
3494
3495     my $active_chainsv6 = iptables_get_chains("ip6tables");
3496     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3497
3498     foreach my $chain (sort keys %$rulesetv6) {
3499         my $stat = $statushashv6->{$chain};
3500         if ($stat->{action} ne 'exists') {
3501             warn "unable to update chain '$chain'\n";
3502             $errors = 1;
3503         }
3504     }
3505
3506     die "unable to apply firewall changes\n" if $errors;
3507
3508     update_nf_conntrack_max($hostfw_conf);
3509
3510     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3511
3512 }
3513
3514 sub update_nf_conntrack_max {
3515     my ($hostfw_conf) = @_;
3516
3517     my $max = 65536; # reasonable default
3518
3519     my $options = $hostfw_conf->{options} || {};
3520
3521     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3522         $max = $options->{nf_conntrack_max};
3523         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3524     }
3525
3526     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3527     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3528
3529     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3530
3531     if ($current != $max) {
3532         my $hashsize = int($max/4);
3533         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3534         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3535     }
3536 }
3537
3538 sub update_nf_conntrack_tcp_timeout_established {
3539     my ($hostfw_conf) = @_;
3540
3541     my $options = $hostfw_conf->{options} || {};
3542
3543     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3544
3545     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3546 }
3547
3548 sub remove_pvefw_chains {
3549
3550     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3551     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3552     PVE::Firewall::remove_pvefw_chains_ipset();
3553
3554 }
3555
3556 sub remove_pvefw_chains_iptables {
3557     my ($iptablescmd) = @_;
3558
3559     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3560     my $cmdlist = "*filter\n";
3561
3562     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3563         if ($hooks->{$h}) {
3564             $cmdlist .= "-D $h -j PVEFW-$h\n";
3565         }
3566     }
3567
3568     foreach my $chain (keys %$chash) {
3569         $cmdlist .= "-F $chain\n";
3570     }
3571
3572     foreach my $chain (keys %$chash) {
3573         $cmdlist .= "-X $chain\n";
3574     }
3575     $cmdlist .= "COMMIT\n";
3576
3577     if($iptablescmd eq "ip6tables") {
3578         ip6tables_restore_cmdlist($cmdlist);
3579     } else {
3580         iptables_restore_cmdlist($cmdlist);
3581     }
3582 }
3583
3584 sub remove_pvefw_chains_ipset {
3585
3586     my $ipset_chains = ipset_get_chains();
3587
3588     my $cmdlist = "";
3589
3590     foreach my $chain (keys %$ipset_chains) {
3591         $cmdlist .= "flush $chain\n";
3592         $cmdlist .= "destroy $chain\n";
3593     }
3594
3595     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3596 }
3597
3598 sub init {
3599     my $cluster_conf = load_clusterfw_conf();
3600     my $cluster_options = $cluster_conf->{options};
3601     my $enable = $cluster_options->{enable};
3602
3603     return if !$enable;
3604
3605     # load required modules here
3606 }
3607
3608 sub update {
3609     my $code = sub {
3610
3611         my $cluster_conf = load_clusterfw_conf();
3612         my $cluster_options = $cluster_conf->{options};
3613
3614         if (!$cluster_options->{enable}) {
3615             PVE::Firewall::remove_pvefw_chains();
3616             return;
3617         }
3618
3619         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3620
3621         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3622
3623         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3624     };
3625
3626     run_locked($code);
3627 }
3628
3629 1;