src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::LXC
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     require PVE::QemuConfig;
  32     $have_qemu_server = 1;
  33 };
  34
  35 my $have_lxc;
  36 eval {
  37     require PVE::LXC;
  38     $have_lxc = 1;
  39 };
  40
  41
  42 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  43
  44 mkdir $pve_fw_status_dir; # make sure this exists
  45
  46 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49
  50 my $max_alias_name_length = 64;
  51 my $max_ipset_name_length = 64;
  52 my $max_group_name_length = 20;
  53
  54 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  55 sub pve_verify_ip_or_cidr {
  56     my ($cidr, $noerr) = @_;
  57
  58     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  59         return $cidr if Net::IP->new($cidr);
  60         return undef if $noerr;
  61         die Net::IP::Error() . "\n";
  62     }
  63     return undef if $noerr;
  64     die "value does not look like a valid IP address or CIDR network\n";
  65 }
  66
  67 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  68 sub pve_verify_ip_or_cidr_or_alias {
  69     my ($cidr, $noerr) = @_;
  70
  71     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  72
  73     return pve_verify_ip_or_cidr($cidr, $noerr);
  74 }
  75
  76 PVE::JSONSchema::register_standard_option('ipset-name', {
  77     description => "IP set name.",
  78     type => 'string',
  79     pattern => $ipset_name_pattern,
  80     minLength => 2,
  81     maxLength => $max_ipset_name_length,
  82 });
  83
  84 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  85     description => "Alias name.",
  86     type => 'string',
  87     pattern => $ip_alias_pattern,
  88     minLength => 2,
  89     maxLength => $max_alias_name_length,
  90 });
  91
  92 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  93     description => "Log level.",
  94     type => 'string',
  95     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  96     optional => 1,
  97 });
  98
  99 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 100     description => "Security Group name.",
 101     type => 'string',
 102     pattern => $security_group_name_pattern,
 103     minLength => 2,
 104     maxLength => $max_group_name_length,
 105 });
 106
 107 my $feature_ipset_nomatch = 0;
 108 eval  {
 109     my (undef, undef, $release) = POSIX::uname();
 110     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 111         my ($major, $minor) = ($1, $2);
 112         $feature_ipset_nomatch = 1 if ($major > 3) ||
 113             ($major == 3 && $minor >= 7);
 114     }
 115
 116 };
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         "DHCPv6 traffic",
 149         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 150     ],
 151     'Trcrt' => [
 152         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 153         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 154     ],
 155  };
 156
 157 # imported/converted from: /usr/share/shorewall/macro.*
 158 my $pve_fw_macros = {
 159     'Amanda' => [
 160         "Amanda Backup",
 161         { action => 'PARAM', proto => 'udp', dport => '10080' },
 162         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 163     ],
 164     'Auth' => [
 165         "Auth (identd) traffic",
 166         { action => 'PARAM', proto => 'tcp', dport => '113' },
 167     ],
 168     'BGP' => [
 169         "Border Gateway Protocol traffic",
 170         { action => 'PARAM', proto => 'tcp', dport => '179' },
 171     ],
 172     'BitTorrent' => [
 173         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 174         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 175         { action => 'PARAM', proto => 'udp', dport => '6881' },
 176     ],
 177     'BitTorrent32' => [
 178         "BitTorrent traffic for BitTorrent 3.2 and later",
 179         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 180         { action => 'PARAM', proto => 'udp', dport => '6881' },
 181     ],
 182     'Ceph' => [
 183         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 184         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 185         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 186     ],
 187     'CVS' => [
 188         "Concurrent Versions System pserver traffic",
 189         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 190     ],
 191     'Citrix' => [
 192         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 193         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 194         { action => 'PARAM', proto => 'udp', dport => '1604' },
 195         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 196     ],
 197     'DAAP' => [
 198         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 199         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 200         { action => 'PARAM', proto => 'udp', dport => '3689' },
 201     ],
 202     'DCC' => [
 203         "Distributed Checksum Clearinghouse spam filtering mechanism",
 204         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 205     ],
 206     'DHCPfwd' => [
 207         "Forwarded DHCP traffic",
 208         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 209     ],
 210     'DNS' => [
 211         "Domain Name System traffic (upd and tcp)",
 212         { action => 'PARAM', proto => 'udp', dport => '53' },
 213         { action => 'PARAM', proto => 'tcp', dport => '53' },
 214     ],
 215     'Distcc' => [
 216         "Distributed Compiler service",
 217         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 218     ],
 219     'FTP' => [
 220         "File Transfer Protocol",
 221         { action => 'PARAM', proto => 'tcp', dport => '21' },
 222     ],
 223     'Finger' => [
 224         "Finger protocol (RFC 742)",
 225         { action => 'PARAM', proto => 'tcp', dport => '79' },
 226     ],
 227     'GNUnet' => [
 228         "GNUnet secure peer-to-peer networking traffic",
 229         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 230         { action => 'PARAM', proto => 'udp', dport => '2086' },
 231         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 232         { action => 'PARAM', proto => 'udp', dport => '1080' },
 233     ],
 234     'GRE' => [
 235         "Generic Routing Encapsulation tunneling protocol",
 236         { action => 'PARAM', proto => '47' },
 237     ],
 238     'Git' => [
 239         "Git distributed revision control traffic",
 240         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 241     ],
 242     'HKP' => [
 243         "OpenPGP HTTP keyserver protocol traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 245     ],
 246     'HTTP' => [
 247         "Hypertext Transfer Protocol (WWW)",
 248         { action => 'PARAM', proto => 'tcp', dport => '80' },
 249     ],
 250     'HTTPS' => [
 251         "Hypertext Transfer Protocol (WWW) over SSL",
 252         { action => 'PARAM', proto => 'tcp', dport => '443' },
 253     ],
 254     'ICPV2' => [
 255         "Internet Cache Protocol V2 (Squid) traffic",
 256         { action => 'PARAM', proto => 'udp', dport => '3130' },
 257     ],
 258     'ICQ' => [
 259         "AOL Instant Messenger traffic",
 260         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 261     ],
 262     'IMAP' => [
 263         "Internet Message Access Protocol",
 264         { action => 'PARAM', proto => 'tcp', dport => '143' },
 265     ],
 266     'IMAPS' => [
 267         "Internet Message Access Protocol over SSL",
 268         { action => 'PARAM', proto => 'tcp', dport => '993' },
 269     ],
 270     'IPIP' => [
 271         "IPIP capsulation traffic",
 272         { action => 'PARAM', proto => '94' },
 273     ],
 274     'IPsec' => [
 275         "IPsec traffic",
 276         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 277         { action => 'PARAM', proto => '50' },
 278     ],
 279     'IPsecah' => [
 280         "IPsec authentication (AH) traffic",
 281         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 282         { action => 'PARAM', proto => '51' },
 283     ],
 284     'IPsecnat' => [
 285         "IPsec traffic and Nat-Traversal",
 286         { action => 'PARAM', proto => 'udp', dport => '500' },
 287         { action => 'PARAM', proto => 'udp', dport => '4500' },
 288         { action => 'PARAM', proto => '50' },
 289     ],
 290     'IRC' => [
 291         "Internet Relay Chat traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 293     ],
 294     'Jetdirect' => [
 295         "HP Jetdirect printing",
 296         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 297     ],
 298     'L2TP' => [
 299         "Layer 2 Tunneling Protocol traffic",
 300         { action => 'PARAM', proto => 'udp', dport => '1701' },
 301     ],
 302     'LDAP' => [
 303         "Lightweight Directory Access Protocol traffic",
 304         { action => 'PARAM', proto => 'tcp', dport => '389' },
 305     ],
 306     'LDAPS' => [
 307         "Secure Lightweight Directory Access Protocol traffic",
 308         { action => 'PARAM', proto => 'tcp', dport => '636' },
 309     ],
 310     'MSNP' => [
 311         "Microsoft Notification Protocol",
 312         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 313     ],
 314     'MSSQL' => [
 315         "Microsoft SQL Server",
 316         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 317     ],
 318     'Mail' => [
 319         "Mail traffic (SMTP, SMTPS, Submission)",
 320         { action => 'PARAM', proto => 'tcp', dport => '25' },
 321         { action => 'PARAM', proto => 'tcp', dport => '465' },
 322         { action => 'PARAM', proto => 'tcp', dport => '587' },
 323     ],
 324     'Munin' => [
 325         "Munin networked resource monitoring traffic",
 326         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 327     ],
 328     'MySQL' => [
 329         "MySQL server",
 330         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 331     ],
 332     'NNTP' => [
 333         "NNTP traffic (Usenet).",
 334         { action => 'PARAM', proto => 'tcp', dport => '119' },
 335     ],
 336     'NNTPS' => [
 337         "Encrypted NNTP traffic (Usenet)",
 338         { action => 'PARAM', proto => 'tcp', dport => '563' },
 339     ],
 340     'NTP' => [
 341         "Network Time Protocol (ntpd)",
 342         { action => 'PARAM', proto => 'udp', dport => '123' },
 343     ],
 344     'OSPF' => [
 345         "OSPF multicast traffic",
 346         { action => 'PARAM', proto => '89' },
 347     ],
 348     'OpenVPN' => [
 349         "OpenVPN traffic",
 350         { action => 'PARAM', proto => 'udp', dport => '1194' },
 351     ],
 352     'PCA' => [
 353         "Symantec PCAnywere (tm)",
 354         { action => 'PARAM', proto => 'udp', dport => '5632' },
 355         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 356     ],
 357     'POP3' => [
 358         "POP3 traffic",
 359         { action => 'PARAM', proto => 'tcp', dport => '110' },
 360     ],
 361     'POP3S' => [
 362         "Encrypted POP3 traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '995' },
 364     ],
 365     'PPtP' => [
 366         "Point-to-Point Tunneling Protocol",
 367         { action => 'PARAM', proto => '47' },
 368         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 369     ],
 370     'Ping' => [
 371         "ICMP echo request",
 372         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 373     ],
 374     'PostgreSQL' => [
 375         "PostgreSQL server",
 376         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 377     ],
 378     'Printer' => [
 379         "Line Printer protocol printing",
 380         { action => 'PARAM', proto => 'tcp', dport => '515' },
 381     ],
 382     'RDP' => [
 383         "Microsoft Remote Desktop Protocol traffic",
 384         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 385     ],
 386     'RIP' => [
 387         "Routing Information Protocol (bidirectional)",
 388         { action => 'PARAM', proto => 'udp', dport => '520' },
 389     ],
 390     'RNDC' => [
 391         "BIND remote management protocol",
 392         { action => 'PARAM', proto => 'tcp', dport => '953' },
 393     ],
 394     'Razor' => [
 395         "Razor Antispam System",
 396         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 397     ],
 398     'Rdate' => [
 399         "Remote time retrieval (rdate)",
 400         { action => 'PARAM', proto => 'tcp', dport => '37' },
 401     ],
 402     'Rsync' => [
 403         "Rsync server",
 404         { action => 'PARAM', proto => 'tcp', dport => '873' },
 405     ],
 406     'SANE' => [
 407         "SANE network scanning",
 408         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 409     ],
 410     'SMB' => [
 411         "Microsoft SMB traffic",
 412         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 413         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 414         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 415         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 416     ],
 417     'SMBswat' => [
 418         "Samba Web Administration Tool",
 419         { action => 'PARAM', proto => 'tcp', dport => '901' },
 420     ],
 421     'SMTP' => [
 422         "Simple Mail Transfer Protocol",
 423         { action => 'PARAM', proto => 'tcp', dport => '25' },
 424     ],
 425     'SMTPS' => [
 426         "Encrypted Simple Mail Transfer Protocol",
 427         { action => 'PARAM', proto => 'tcp', dport => '465' },
 428     ],
 429     'SNMP' => [
 430         "Simple Network Management Protocol",
 431         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 432         { action => 'PARAM', proto => 'tcp', dport => '161' },
 433     ],
 434     'SPAMD' => [
 435         "Spam Assassin SPAMD traffic",
 436         { action => 'PARAM', proto => 'tcp', dport => '783' },
 437     ],
 438     'SSH' => [
 439         "Secure shell traffic",
 440         { action => 'PARAM', proto => 'tcp', dport => '22' },
 441     ],
 442     'SVN' => [
 443         "Subversion server (svnserve)",
 444         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 445     ],
 446     'SixXS' => [
 447         "SixXS IPv6 Deployment and Tunnel Broker",
 448         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 449         { action => 'PARAM', proto => 'udp', dport => '3740' },
 450         { action => 'PARAM', proto => '41' },
 451         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 452     ],
 453     'Squid' => [
 454         "Squid web proxy traffic",
 455         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 456     ],
 457     'Submission' => [
 458         "Mail message submission traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '587' },
 460     ],
 461     'Syslog' => [
 462         "Syslog protocol (RFC 5424) traffic",
 463         { action => 'PARAM', proto => 'udp', dport => '514' },
 464         { action => 'PARAM', proto => 'tcp', dport => '514' },
 465     ],
 466     'TFTP' => [
 467         "Trivial File Transfer Protocol traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '69' },
 469     ],
 470     'Telnet' => [
 471         "Telnet traffic",
 472         { action => 'PARAM', proto => 'tcp', dport => '23' },
 473     ],
 474     'Telnets' => [
 475         "Telnet over SSL",
 476         { action => 'PARAM', proto => 'tcp', dport => '992' },
 477     ],
 478     'Time' => [
 479         "RFC 868 Time protocol",
 480         { action => 'PARAM', proto => 'tcp', dport => '37' },
 481     ],
 482     'Trcrt' => [
 483         "Traceroute (for up to 30 hops) traffic",
 484         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 485         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 486     ],
 487     'VNC' => [
 488         "VNC traffic for VNC display's 0 - 99",
 489         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 490     ],
 491     'VNCL' => [
 492         "VNC traffic from Vncservers to Vncviewers in listen mode",
 493         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 494     ],
 495     'Web' => [
 496         "WWW traffic (HTTP and HTTPS)",
 497         { action => 'PARAM', proto => 'tcp', dport => '80' },
 498         { action => 'PARAM', proto => 'tcp', dport => '443' },
 499     ],
 500     'Webcache' => [
 501         "Web Cache/Proxy traffic (port 8080)",
 502         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 503     ],
 504     'Webmin' => [
 505         "Webmin traffic",
 506         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 507     ],
 508     'Whois' => [
 509         "Whois (nicname, RFC 3912) traffic",
 510         { action => 'PARAM', proto => 'tcp', dport => '43' },
 511     ],
 512 };
 513
 514 my $pve_fw_parsed_macros;
 515 my $pve_fw_macro_descr;
 516 my $pve_fw_macro_ipversion = {};
 517 my $pve_fw_preferred_macro_names = {};
 518
 519 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 520 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 521
 522 my $pve_std_chains = {};
 523 $pve_std_chains->{4} = {
 524     'PVEFW-SET-ACCEPT-MARK' => [
 525         "-j MARK --set-mark $FWACCEPTMARK_ON",
 526     ],
 527     'PVEFW-DropBroadcast' => [
 528         # same as shorewall 'Broadcast'
 529         # simply DROP BROADCAST/MULTICAST/ANYCAST
 530         # we can use this to reduce logging
 531         { action => 'DROP', dsttype => 'BROADCAST' },
 532         { action => 'DROP', dsttype => 'MULTICAST' },
 533         { action => 'DROP', dsttype => 'ANYCAST' },
 534         { action => 'DROP', dest => '224.0.0.0/4' },
 535     ],
 536     'PVEFW-reject' => [
 537         # same as shorewall 'reject'
 538         { action => 'DROP', dsttype => 'BROADCAST' },
 539         { action => 'DROP', source => '224.0.0.0/4' },
 540         { action => 'DROP', proto => 'icmp' },
 541         "-p tcp -j REJECT --reject-with tcp-reset",
 542         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 543         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 544         "-j REJECT --reject-with icmp-host-prohibited",
 545     ],
 546     'PVEFW-Drop' => [
 547         # same as shorewall 'Drop', which is equal to DROP,
 548         # but REJECT/DROP some packages to reduce logging,
 549         # and ACCEPT critical ICMP types
 550         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 551         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 552         { action => 'PVEFW-DropBroadcast' },
 553         # ACCEPT critical ICMP types
 554         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 556         # Drop packets with INVALID state
 557         "-m conntrack --ctstate INVALID -j DROP",
 558         # Drop Microsoft SMB noise
 559         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 560         { action => 'DROP', proto => 'udp', dport => '137:139'},
 561         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 562         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 563         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 564         # Drop new/NotSyn traffic so that it doesn't get logged
 565         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 566         # Drop DNS replies
 567         { action => 'DROP', proto => 'udp', sport => 53 },
 568     ],
 569     'PVEFW-Reject' => [
 570         # same as shorewall 'Reject', which is equal to Reject,
 571         # but REJECT/DROP some packages to reduce logging,
 572         # and ACCEPT critical ICMP types
 573         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 574         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 575         { action => 'PVEFW-DropBroadcast' },
 576         # ACCEPT critical ICMP types
 577         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 578         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 579         # Drop packets with INVALID state
 580         "-m conntrack --ctstate INVALID -j DROP",
 581         # Drop Microsoft SMB noise
 582         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 583         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 584         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 585         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 586         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 587         # Drop new/NotSyn traffic so that it doesn't get logged
 588         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 589         # Drop DNS replies
 590         { action => 'DROP', proto => 'udp', sport => 53 },
 591     ],
 592     'PVEFW-tcpflags' => [
 593         # same as shorewall tcpflags action.
 594         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 595         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 596         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 597         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 598         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 599         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 600     ],
 601     'PVEFW-smurfs' => [
 602         # same as shorewall smurfs action
 603         # Filter packets for smurfs (packets with a broadcast address as the source).
 604         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 605         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 606         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 607     ],
 608 };
 609
 610 $pve_std_chains->{6} = {
 611     'PVEFW-SET-ACCEPT-MARK' => [
 612         "-j MARK --set-mark $FWACCEPTMARK_ON",
 613     ],
 614     'PVEFW-DropBroadcast' => [
 615         # same as shorewall 'Broadcast'
 616         # simply DROP BROADCAST/MULTICAST/ANYCAST
 617         # we can use this to reduce logging
 618         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 619         # ipv6 addrtype does not work with kernel 2.6.32
 620         #{ action => 'DROP', dsttype => 'MULTICAST' },
 621         #{ action => 'DROP', dsttype => 'ANYCAST' },
 622         { action => 'DROP', dest => 'ff00::/8' },
 623         #{ action => 'DROP', dest => '224.0.0.0/4' },
 624     ],
 625     'PVEFW-reject' => [
 626         # same as shorewall 'reject'
 627         #{ action => 'DROP', dsttype => 'BROADCAST' },
 628         #{ action => 'DROP', source => '224.0.0.0/4' },
 629         { action => 'DROP', proto => 'icmpv6' },
 630         "-p tcp -j REJECT --reject-with tcp-reset",
 631         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 632         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 633         #"-j REJECT --reject-with icmp-host-prohibited",
 634     ],
 635     'PVEFW-Drop' => [
 636         # same as shorewall 'Drop', which is equal to DROP,
 637         # but REJECT/DROP some packages to reduce logging,
 638         # and ACCEPT critical ICMP types
 639         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 640         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 641         { action => 'PVEFW-DropBroadcast' },
 642         # ACCEPT critical ICMP types
 643         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 644         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 645         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 646
 647         # Drop packets with INVALID state
 648         "-m conntrack --ctstate INVALID -j DROP",
 649         # Drop Microsoft SMB noise
 650         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 651         { action => 'DROP', proto => 'udp', dport => '137:139'},
 652         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 653         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 654         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 655         # Drop new/NotSyn traffic so that it doesn't get logged
 656         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 657         # Drop DNS replies
 658         { action => 'DROP', proto => 'udp', sport => 53 },
 659     ],
 660     'PVEFW-Reject' => [
 661         # same as shorewall 'Reject', which is equal to Reject,
 662         # but REJECT/DROP some packages to reduce logging,
 663         # and ACCEPT critical ICMP types
 664         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 665         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 666         { action => 'PVEFW-DropBroadcast' },
 667         # ACCEPT critical ICMP types
 668         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 669         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 670         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 671
 672         # Drop packets with INVALID state
 673         "-m conntrack --ctstate INVALID -j DROP",
 674         # Drop Microsoft SMB noise
 675         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 676         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 677         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 678         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 679         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 680         # Drop new/NotSyn traffic so that it doesn't get logged
 681         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 682         # Drop DNS replies
 683         { action => 'DROP', proto => 'udp', sport => 53 },
 684     ],
 685     'PVEFW-tcpflags' => [
 686         # same as shorewall tcpflags action.
 687         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 688         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 689         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 690         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 691         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 692         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 693     ],
 694 };
 695
 696 # iptables -p icmp -h
 697 my $icmp_type_names = {
 698     any => 1,
 699     'echo-reply' => 1,
 700     'destination-unreachable' => 1,
 701     'network-unreachable' => 1,
 702     'host-unreachable' => 1,
 703     'protocol-unreachable' => 1,
 704     'port-unreachable' => 1,
 705     'fragmentation-needed' => 1,
 706     'source-route-failed' => 1,
 707     'network-unknown' => 1,
 708     'host-unknown' => 1,
 709     'network-prohibited' => 1,
 710     'host-prohibited' => 1,
 711     'TOS-network-unreachable' => 1,
 712     'TOS-host-unreachable' => 1,
 713     'communication-prohibited' => 1,
 714     'host-precedence-violation' => 1,
 715     'precedence-cutoff' => 1,
 716     'source-quench' => 1,
 717     'redirect' => 1,
 718     'network-redirect' => 1,
 719     'host-redirect' => 1,
 720     'TOS-network-redirect' => 1,
 721     'TOS-host-redirect' => 1,
 722     'echo-request' => 1,
 723     'router-advertisement' => 1,
 724     'router-solicitation' => 1,
 725     'time-exceeded' => 1,
 726     'ttl-zero-during-transit' => 1,
 727     'ttl-zero-during-reassembly' => 1,
 728     'parameter-problem' => 1,
 729     'ip-header-bad' => 1,
 730     'required-option-missing' => 1,
 731     'timestamp-request' => 1,
 732     'timestamp-reply' => 1,
 733     'address-mask-request' => 1,
 734     'address-mask-reply' => 1,
 735 };
 736
 737 # ip6tables -p icmpv6 -h
 738
 739 my $icmpv6_type_names = {
 740     'any' => 1,
 741     'destination-unreachable' => 1,
 742     'no-route' => 1,
 743     'communication-prohibited' => 1,
 744     'address-unreachable' => 1,
 745     'port-unreachable' => 1,
 746     'packet-too-big' => 1,
 747     'time-exceeded' => 1,
 748     'ttl-zero-during-transit' => 1,
 749     'ttl-zero-during-reassembly' => 1,
 750     'parameter-problem' => 1,
 751     'bad-header' => 1,
 752     'unknown-header-type' => 1,
 753     'unknown-option' => 1,
 754     'echo-request' => 1,
 755     'echo-reply' => 1,
 756     'router-solicitation' => 1,
 757     'router-advertisement' => 1,
 758     'neighbor-solicitation' => 1,
 759     'neighbour-solicitation' => 1,
 760     'neighbor-advertisement' => 1,
 761     'neighbour-advertisement' => 1,
 762     'redirect' => 1,
 763 };
 764
 765 sub init_firewall_macros {
 766
 767     $pve_fw_parsed_macros = {};
 768
 769     my $parse = sub {
 770         my ($k, $macro) = @_;
 771         my $lc_name = lc($k);
 772         $pve_fw_macro_ipversion->{$k} = 0;
 773         while (!ref($macro->[0])) {
 774             my $desc = shift @$macro;
 775             if ($desc eq 'ipv4only') {
 776                 $pve_fw_macro_ipversion->{$k} = 4;
 777             } elsif ($desc eq 'ipv6only') {
 778                 $pve_fw_macro_ipversion->{$k} = 6;
 779             } else {
 780                 $pve_fw_macro_descr->{$k} = $desc;
 781             }
 782         }
 783         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 784         $pve_fw_parsed_macros->{$k} = $macro;
 785     };
 786
 787     foreach my $k (keys %$pve_fw_macros) {
 788         &$parse($k, $pve_fw_macros->{$k});
 789     }
 790
 791     foreach my $k (keys %$pve_ipv6fw_macros) {
 792         next if $pve_fw_parsed_macros->{$k};
 793         &$parse($k, $pve_ipv6fw_macros->{$k});
 794         $pve_fw_macro_ipversion->{$k} = 6;
 795     }
 796 }
 797
 798 init_firewall_macros();
 799
 800 sub get_macros {
 801     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 802 }
 803
 804 my $etc_services;
 805
 806 sub get_etc_services {
 807
 808     return $etc_services if $etc_services;
 809
 810     my $filename = "/etc/services";
 811
 812     my $fh = IO::File->new($filename, O_RDONLY);
 813     if (!$fh) {
 814         warn "unable to read '$filename' - $!\n";
 815         return {};
 816     }
 817
 818     my $services = {};
 819
 820     while (my $line = <$fh>) {
 821         chomp ($line);
 822         next if $line =~m/^#/;
 823         next if ($line =~m/^\s*$/);
 824
 825         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 826             $services->{byid}->{$2}->{name} = $1;
 827             $services->{byid}->{$2}->{port} = $2;
 828             $services->{byid}->{$2}->{$3} = 1;
 829             $services->{byname}->{$1} = $services->{byid}->{$2};
 830         }
 831     }
 832
 833     close($fh);
 834
 835     $etc_services = $services;
 836
 837
 838     return $etc_services;
 839 }
 840
 841 my $etc_protocols;
 842
 843 sub get_etc_protocols {
 844     return $etc_protocols if $etc_protocols;
 845
 846     my $filename = "/etc/protocols";
 847
 848     my $fh = IO::File->new($filename, O_RDONLY);
 849     if (!$fh) {
 850         warn "unable to read '$filename' - $!\n";
 851         return {};
 852     }
 853
 854     my $protocols = {};
 855
 856     while (my $line = <$fh>) {
 857         chomp ($line);
 858         next if $line =~m/^#/;
 859         next if ($line =~m/^\s*$/);
 860
 861         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 862             $protocols->{byid}->{$2}->{name} = $1;
 863             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 864         }
 865     }
 866
 867     close($fh);
 868
 869     # add special case for ICMP v6
 870     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 871     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 872
 873     $etc_protocols = $protocols;
 874
 875     return $etc_protocols;
 876 }
 877
 878 my $ipv4_mask_hash_localnet = {
 879     '255.255.0.0' => 16,
 880     '255.255.128.0' => 17,
 881     '255.255.192.0' => 18,
 882     '255.255.224.0' => 19,
 883     '255.255.240.0' => 20,
 884     '255.255.248.0' => 21,
 885     '255.255.252.0' => 22,
 886     '255.255.254.0' => 23,
 887     '255.255.255.0' => 24,
 888     '255.255.255.128' => 25,
 889     '255.255.255.192' => 26,
 890     '255.255.255.224' => 27,
 891     '255.255.255.240' => 28,
 892     '255.255.255.248' => 29,
 893     '255.255.255.252' => 30,
 894 };
 895
 896 my $__local_network;
 897
 898 sub local_network {
 899     my ($new_value) = @_;
 900
 901     $__local_network = $new_value if defined($new_value);
 902
 903     return $__local_network if defined($__local_network);
 904
 905     eval {
 906         my $nodename = PVE::INotify::nodename();
 907
 908         my $ip = PVE::Cluster::remote_node_ip($nodename);
 909
 910         my $testip = Net::IP->new($ip);
 911
 912         my $isv6 = $testip->version == 6;
 913         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 914                            : PVE::ProcFSTools::read_proc_net_route();
 915         foreach my $entry (@$routes) {
 916             my $mask;
 917             if ($isv6) {
 918                 $mask = $entry->{prefix};
 919             } else {
 920                 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 921                 next if !defined($mask);
 922             }
 923             my $cidr = "$entry->{dest}/$mask";
 924             my $testnet = Net::IP->new($cidr);
 925             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 926                 $__local_network = $cidr;
 927                 return;
 928             }
 929         }
 930     };
 931     warn $@ if $@;
 932
 933     return $__local_network;
 934 }
 935
 936 # ipset names are limited to 31 characters,
 937 # and we use '-v4' or '-v6' to indicate IP versions,
 938 # and we use '_swap' suffix for atomic update,
 939 # for example PVEFW-${VMID}-${ipset_name}_swap
 940
 941 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 942
 943 sub compute_ipset_chain_name {
 944     my ($vmid, $ipset_name, $ipversion) = @_;
 945
 946     $vmid = 0 if !defined($vmid);
 947
 948     my $id = "$vmid-${ipset_name}-v$ipversion";
 949
 950     if (length($id) > $max_iptables_ipset_name_length) {
 951         $id = PVE::Tools::fnv31a_hex($id);
 952     }
 953
 954     return "PVEFW-$id";
 955 }
 956
 957 sub compute_ipfilter_ipset_name {
 958     my ($iface) = @_;
 959
 960     return "ipfilter-$iface";
 961 }
 962
 963 sub parse_address_list {
 964     my ($str) = @_;
 965
 966     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 967         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 968         return;
 969     }
 970
 971     if ($str =~ m/^${ip_alias_pattern}$/) {
 972         die "alias name too long\n" if length($str) > $max_alias_name_length;
 973         return;
 974     }
 975
 976     my $count = 0;
 977     my $iprange = 0;
 978     my $ipversion;
 979
 980     foreach my $elem (split(/,/, $str)) {
 981         $count++;
 982         my $ip = Net::IP->new($elem);
 983         if (!$ip) {
 984             my $err = Net::IP::Error();
 985             die "invalid IP address: $err\n";
 986         }
 987         $iprange = 1 if $elem =~ m/-/;
 988
 989         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 990
 991         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 992             if $ipversion && ($new_ipversion != $ipversion);
 993
 994         $ipversion = $new_ipversion;
 995     }
 996
 997     die "you can't use a range in a list\n" if $iprange && $count > 1;
 998
 999     return $ipversion;
1000 }
1001
1002 sub parse_port_name_number_or_range {
1003     my ($str, $dport) = @_;
1004
1005     my $services = PVE::Firewall::get_etc_services();
1006     my $count = 0;
1007     my $icmp_port = 0;
1008
1009     foreach my $item (split(/,/, $str)) {
1010         $count++;
1011         if ($item =~ m/^(\d+):(\d+)$/) {
1012             my ($port1, $port2) = ($1, $2);
1013             die "invalid port '$port1'\n" if $port1 > 65535;
1014             die "invalid port '$port2'\n" if $port2 > 65535;
1015         } elsif ($item =~ m/^(\d+)$/) {
1016             my $port = $1;
1017             die "invalid port '$port'\n" if $port > 65535;
1018         } else {
1019             if ($dport && $icmp_type_names->{$item}) {
1020                 $icmp_port = 1;
1021             } elsif ($dport && $icmpv6_type_names->{$item}) {
1022                 $icmp_port = 1;
1023             } else {
1024                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1025             }
1026         }
1027     }
1028
1029     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1030
1031     return $count;
1032 }
1033
1034 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1035 sub pve_fw_verify_sport_spec {
1036    my ($portstr) = @_;
1037
1038    parse_port_name_number_or_range($portstr, 0);
1039
1040    return $portstr;
1041 }
1042
1043 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1044 sub pve_fw_verify_dport_spec {
1045    my ($portstr) = @_;
1046
1047    parse_port_name_number_or_range($portstr, 1);
1048
1049    return $portstr;
1050 }
1051
1052 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1053 sub pve_fw_verify_addr_spec {
1054    my ($list) = @_;
1055
1056    parse_address_list($list);
1057
1058    return $list;
1059 }
1060
1061 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1062 sub pve_fw_verify_protocol_spec {
1063    my ($proto) = @_;
1064
1065    my $protocols = get_etc_protocols();
1066
1067    die "unknown protocol '$proto'\n" if $proto &&
1068        !(defined($protocols->{byname}->{$proto}) ||
1069          defined($protocols->{byid}->{$proto}));
1070
1071    return $proto;
1072 }
1073
1074
1075 # helper function for API
1076
1077 sub copy_opject_with_digest {
1078     my ($object) = @_;
1079
1080     my $sha = Digest::SHA->new('sha1');
1081
1082     my $res = {};
1083     foreach my $k (sort keys %$object) {
1084         my $v = $object->{$k};
1085         next if !defined($v);
1086         $res->{$k} = $v;
1087         $sha->add($k, ':', $v, "\n");
1088     }
1089
1090     my $digest = $sha->hexdigest;
1091
1092     $res->{digest} = $digest;
1093
1094     return wantarray ? ($res, $digest) : $res;
1095 }
1096
1097 sub copy_list_with_digest {
1098     my ($list) = @_;
1099
1100     my $sha = Digest::SHA->new('sha1');
1101
1102     my $res = [];
1103     foreach my $entry (@$list) {
1104         my $data = {};
1105         foreach my $k (sort keys %$entry) {
1106             my $v = $entry->{$k};
1107             next if !defined($v);
1108             $data->{$k} = $v;
1109             # Note: digest ignores refs ($rule->{errors})
1110             # since Digest::SHA expects a series of bytes,
1111             #  we have to encode the value here to prevent errors when
1112             #  using utf8 characters (eg. in comments)
1113             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1114         }
1115         push @$res, $data;
1116     }
1117
1118     my $digest = $sha->hexdigest;
1119
1120     foreach my $entry (@$res) {
1121         $entry->{digest} = $digest;
1122     }
1123
1124     return wantarray ? ($res, $digest) : $res;
1125 }
1126
1127 our $cluster_option_properties = {
1128     enable => {
1129         description => "Enable or disable the firewall cluster wide.",
1130         type => 'integer',
1131         minimum => 0,
1132         optional => 1,
1133     },
1134     policy_in => {
1135         description => "Input policy.",
1136         type => 'string',
1137         optional => 1,
1138         enum => ['ACCEPT', 'REJECT', 'DROP'],
1139     },
1140     policy_out => {
1141         description => "Output policy.",
1142         type => 'string',
1143         optional => 1,
1144         enum => ['ACCEPT', 'REJECT', 'DROP'],
1145     },
1146 };
1147
1148 our $host_option_properties = {
1149     enable => {
1150         description => "Enable host firewall rules.",
1151         type => 'boolean',
1152         optional => 1,
1153     },
1154     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1155         description => "Log level for incoming traffic." }),
1156     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1157         description => "Log level for outgoing traffic." }),
1158     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1159         description => "Log level for illegal tcp flags filter." }),
1160     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1161         description => "Log level for SMURFS filter." }),
1162     nosmurfs => {
1163         description => "Enable SMURFS filter.",
1164         type => 'boolean',
1165         optional => 1,
1166     },
1167     tcpflags => {
1168         description => "Filter illegal combinations of TCP flags.",
1169         type => 'boolean',
1170         optional => 1,
1171     },
1172     nf_conntrack_max => {
1173         description => "Maximum number of tracked connections.",
1174         type => 'integer',
1175         optional => 1,
1176         minimum => 32768,
1177     },
1178     nf_conntrack_tcp_timeout_established => {
1179         description => "Conntrack established timeout.",
1180         type => 'integer',
1181         optional => 1,
1182         minimum => 7875,
1183     },
1184     ndp => {
1185         description => "Enable NDP.",
1186         type => 'boolean',
1187         optional => 1,
1188     },
1189 };
1190
1191 our $vm_option_properties = {
1192     enable => {
1193         description => "Enable/disable firewall rules.",
1194         type => 'boolean',
1195         optional => 1,
1196     },
1197     macfilter => {
1198         description => "Enable/disable MAC address filter.",
1199         type => 'boolean',
1200         optional => 1,
1201     },
1202     dhcp => {
1203         description => "Enable DHCP.",
1204         type => 'boolean',
1205         optional => 1,
1206     },
1207     ndp => {
1208         description => "Enable NDP.",
1209         type => 'boolean',
1210         optional => 1,
1211     },
1212     radv => {
1213         description => "Allow sending Router Advertisement.",
1214         type => 'boolean',
1215         optional => 1,
1216     },
1217     ipfilter => {
1218         description => "Enable default IP filters. " .
1219            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1220            "for every interface. Such ipsets implicitly contain sane default " .
1221            "restrictions such as restricting IPv6 link local addresses to " .
1222            "the one derived from the interface's MAC address. For containers " .
1223            "the configured IP addresses will be implicitly added.",
1224         type => 'boolean',
1225         optional => 1,
1226     },
1227     policy_in => {
1228         description => "Input policy.",
1229         type => 'string',
1230         optional => 1,
1231         enum => ['ACCEPT', 'REJECT', 'DROP'],
1232     },
1233     policy_out => {
1234         description => "Output policy.",
1235         type => 'string',
1236         optional => 1,
1237         enum => ['ACCEPT', 'REJECT', 'DROP'],
1238     },
1239     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1240         description => "Log level for incoming traffic." }),
1241     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1242         description => "Log level for outgoing traffic." }),
1243
1244 };
1245
1246
1247 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1248
1249 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1250
1251 my $rule_properties = {
1252     pos => {
1253         description => "Update rule at position <pos>.",
1254         type => 'integer',
1255         minimum => 0,
1256         optional => 1,
1257     },
1258     digest => get_standard_option('pve-config-digest'),
1259     type => {
1260         type => 'string',
1261         optional => 1,
1262         enum => ['in', 'out', 'group'],
1263     },
1264     action => {
1265         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1266         type => 'string',
1267         optional => 1,
1268         pattern => $security_group_name_pattern,
1269         maxLength => 20,
1270         minLength => 2,
1271     },
1272     macro => {
1273         type => 'string',
1274         optional => 1,
1275         maxLength => 128,
1276     },
1277     iface => get_standard_option('pve-iface', {
1278         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1279         optional => 1
1280     }),
1281     source => {
1282         description => "Restrict packet source address. $addr_list_descr",
1283         type => 'string', format => 'pve-fw-addr-spec',
1284         optional => 1,
1285     },
1286     dest => {
1287         description => "Restrict packet destination address. $addr_list_descr",
1288         type => 'string', format => 'pve-fw-addr-spec',
1289         optional => 1,
1290     },
1291     proto => {
1292         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1293         type => 'string', format => 'pve-fw-protocol-spec',
1294         optional => 1,
1295     },
1296     enable => {
1297         type => 'integer',
1298         minimum => 0,
1299         optional => 1,
1300     },
1301     sport => {
1302         description => "Restrict TCP/UDP source port. $port_descr",
1303         type => 'string', format => 'pve-fw-sport-spec',
1304         optional => 1,
1305     },
1306     dport => {
1307         description => "Restrict TCP/UDP destination port. $port_descr",
1308         type => 'string', format => 'pve-fw-dport-spec',
1309         optional => 1,
1310     },
1311     comment => {
1312         type => 'string',
1313         optional => 1,
1314     },
1315 };
1316
1317 sub add_rule_properties {
1318     my ($properties) = @_;
1319
1320     foreach my $k (keys %$rule_properties) {
1321         my $h = $rule_properties->{$k};
1322         # copy data, so that we can modify later without side effects
1323         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1324     }
1325
1326     return $properties;
1327 }
1328
1329 sub delete_rule_properties {
1330     my ($rule, $delete_str) = @_;
1331
1332     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1333         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1334             if !defined($rule_properties->{$opt});
1335         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1336             if $opt eq 'type' || $opt eq 'action';
1337         delete $rule->{$opt};
1338     }
1339
1340     return $rule;
1341 }
1342
1343 my $apply_macro = sub {
1344     my ($macro_name, $param, $verify, $ipversion) = @_;
1345
1346     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1347     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1348
1349     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1350         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1351     }
1352
1353     # skip macros which are specific to another ipversion
1354     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1355         return if $ipversion != $required;
1356     }
1357
1358     my $rules = [];
1359
1360     foreach my $templ (@$macro_rules) {
1361         my $rule = {};
1362         my $param_used = {};
1363         foreach my $k (keys %$templ) {
1364             my $v = $templ->{$k};
1365             if ($v eq 'PARAM') {
1366                 $v = $param->{$k};
1367                 $param_used->{$k} = 1;
1368             } elsif ($v eq 'DEST') {
1369                 $v = $param->{dest};
1370                 $param_used->{dest} = 1;
1371             } elsif ($v eq 'SOURCE') {
1372                 $v = $param->{source};
1373                 $param_used->{source} = 1;
1374             }
1375
1376             if (!defined($v)) {
1377                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1378                 raise_param_exc({ macro => $msg }) if $verify;
1379                 die "$msg\n";
1380             }
1381             $rule->{$k} = $v;
1382         }
1383         foreach my $k (keys %$param) {
1384             next if $k eq 'macro';
1385             next if !defined($param->{$k});
1386             next if $param_used->{$k};
1387             if (defined($rule->{$k})) {
1388                 if ($rule->{$k} ne $param->{$k}) {
1389                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1390                     raise_param_exc({ $k => $msg }) if $verify;
1391                     die "$msg\n";
1392                 }
1393             } else {
1394                 $rule->{$k} = $param->{$k};
1395             }
1396         }
1397         push @$rules, $rule;
1398     }
1399
1400     return $rules;
1401 };
1402
1403 my $rule_env_iface_lookup = {
1404     'ct' => 1,
1405     'vm' => 1,
1406     'group' => 0,
1407     'cluster' => 1,
1408     'host' => 1,
1409 };
1410
1411 sub verify_rule {
1412     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1413
1414     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1415
1416     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1417     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1418
1419     my $errors = $rule->{errors} || {};
1420
1421     my $error_count = 0;
1422
1423     my $add_error = sub {
1424         my ($param, $msg)  = @_;
1425         chomp $msg;
1426         raise_param_exc({ $param => $msg }) if !$noerr;
1427         $error_count++;
1428         $errors->{$param} = $msg if !$errors->{$param};
1429     };
1430
1431     my $ipversion;
1432     my $set_ip_version = sub {
1433         my $vers = shift;
1434         if ($vers) {
1435             die "detected mixed ipv4/ipv6 adresses in rule\n"
1436                 if $ipversion && ($vers != $ipversion);
1437             $ipversion = $vers;
1438         }
1439     };
1440
1441     my $check_ipset_or_alias_property = sub {
1442         my ($name, $expected_ipversion) = @_;
1443
1444         if (my $value = $rule->{$name}) {
1445             if ($value =~ m/^\+/) {
1446                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1447                     &$add_error($name, "no such ipset '$1'")
1448                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1449
1450                 } else {
1451                     &$add_error($name, "invalid ipset name '$value'");
1452                 }
1453             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1454                 my $alias = lc($value);
1455                 &$add_error($name, "no such alias '$value'")
1456                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1457                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1458                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1459
1460                 &$set_ip_version($e->{ipversion});
1461             }
1462         }
1463     };
1464
1465     my $type = $rule->{type};
1466     my $action = $rule->{action};
1467
1468     &$add_error('type', "missing property") if !$type;
1469     &$add_error('action', "missing property") if !$action;
1470
1471     if ($type) {
1472         if ($type eq  'in' || $type eq 'out') {
1473             &$add_error('action', "unknown action '$action'")
1474                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1475         } elsif ($type eq 'group') {
1476             &$add_error('type', "security groups not allowed")
1477                 if !$allow_groups;
1478             &$add_error('action', "invalid characters in security group name")
1479                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1480         } else {
1481             &$add_error('type', "unknown rule type '$type'");
1482         }
1483     }
1484
1485     if ($rule->{iface}) {
1486         &$add_error('type', "parameter -i not allowed for this rule type")
1487             if !$allow_iface;
1488         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1489         &$add_error('iface', $@) if $@;
1490         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1491             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1492                 if $rule->{iface} !~  m/^net(\d+)$/;
1493         }
1494     }
1495
1496     if ($rule->{macro}) {
1497         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1498             $rule->{macro} = $preferred_name;
1499         } else {
1500             &$add_error('macro', "unknown macro '$rule->{macro}'");
1501         }
1502     }
1503
1504     if ($rule->{proto}) {
1505         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1506         &$add_error('proto', $@) if $@;
1507         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1508         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1509     }
1510
1511     if ($rule->{dport}) {
1512         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1513         &$add_error('dport', $@) if $@;
1514         &$add_error('proto', "missing property - 'dport' requires this property")
1515             if !$rule->{proto};
1516     }
1517
1518     if ($rule->{sport}) {
1519         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1520         &$add_error('sport', $@) if $@;
1521         &$add_error('proto', "missing property - 'sport' requires this property")
1522             if !$rule->{proto};
1523     }
1524
1525     if ($rule->{source}) {
1526         eval {
1527             my $source_ipversion = parse_address_list($rule->{source});
1528             &$set_ip_version($source_ipversion);
1529         };
1530         &$add_error('source', $@) if $@;
1531         &$check_ipset_or_alias_property('source', $ipversion);
1532     }
1533
1534     if ($rule->{dest}) {
1535         eval {
1536             my $dest_ipversion = parse_address_list($rule->{dest});
1537             &$set_ip_version($dest_ipversion);
1538         };
1539         &$add_error('dest', $@) if $@;
1540         &$check_ipset_or_alias_property('dest', $ipversion);
1541     }
1542
1543     $rule->{ipversion} = $ipversion if $ipversion;
1544
1545     if ($rule->{macro} && !$error_count) {
1546         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1547         if (my $err = $@) {
1548             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1549                 my $eh = $err->{errors};
1550                 foreach my $p (keys %$eh) {
1551                     &$add_error($p, $eh->{$p});
1552                 }
1553             } else {
1554                 &$add_error('macro', "$err");
1555             }
1556         }
1557     }
1558
1559     $rule->{errors} = $errors if $error_count;
1560
1561     return $rule;
1562 }
1563
1564 sub copy_rule_data {
1565     my ($rule, $param) = @_;
1566
1567     foreach my $k (keys %$rule_properties) {
1568         if (defined(my $v = $param->{$k})) {
1569             if ($v eq '' || $v eq '-') {
1570                 delete $rule->{$k};
1571             } else {
1572                 $rule->{$k} = $v;
1573             }
1574         }
1575     }
1576
1577     return $rule;
1578 }
1579
1580 sub rules_modify_permissions {
1581     my ($rule_env) = @_;
1582
1583     if ($rule_env eq 'host') {
1584         return {
1585             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1586         };
1587     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1588         return {
1589             check => ['perm', '/', [ 'Sys.Modify' ]],
1590         };
1591     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1592         return {
1593             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1594         }
1595     }
1596
1597     return undef;
1598 }
1599
1600 sub rules_audit_permissions {
1601     my ($rule_env) = @_;
1602
1603     if ($rule_env eq 'host') {
1604         return {
1605             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1606         };
1607     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1608         return {
1609             check => ['perm', '/', [ 'Sys.Audit' ]],
1610         };
1611     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1612         return {
1613             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1614         }
1615     }
1616
1617     return undef;
1618 }
1619
1620 # core functions
1621 my $bridge_firewall_enabled = 0;
1622
1623 sub enable_bridge_firewall {
1624
1625     return if $bridge_firewall_enabled; # only once
1626
1627     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1628     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1629
1630     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1631     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1632
1633     $bridge_firewall_enabled = 1;
1634 }
1635
1636 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1637
1638 sub iptables_restore_cmdlist {
1639     my ($cmdlist) = @_;
1640
1641     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1642 }
1643
1644 sub ip6tables_restore_cmdlist {
1645     my ($cmdlist) = @_;
1646
1647     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1648 }
1649
1650 sub ipset_restore_cmdlist {
1651     my ($cmdlist) = @_;
1652
1653     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1654 }
1655
1656 sub iptables_get_chains {
1657     my ($iptablescmd) = @_;
1658
1659     $iptablescmd = "iptables" if !$iptablescmd;
1660
1661     my $res = {};
1662
1663     # check what chains we want to track
1664     my $is_pvefw_chain = sub {
1665         my $name = shift;
1666
1667         return 1 if $name =~ m/^PVEFW-\S+$/;
1668
1669         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1670
1671         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1672
1673         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1674         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1675
1676         return undef;
1677     };
1678
1679     my $table = '';
1680
1681     my $hooks = {};
1682
1683     my $parser = sub {
1684         my $line = shift;
1685
1686         return if $line =~ m/^#/;
1687         return if $line =~ m/^\s*$/;
1688
1689         if ($line =~ m/^\*(\S+)$/) {
1690             $table = $1;
1691             return;
1692         }
1693
1694         return if $table ne 'filter';
1695
1696         if ($line =~ m/^:(\S+)\s/) {
1697             my $chain = $1;
1698             return if !&$is_pvefw_chain($chain);
1699             $res->{$chain} = "unknown";
1700         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1701             my ($chain, $sig) = ($1, $2);
1702             return if !&$is_pvefw_chain($chain);
1703             $res->{$chain} = $sig;
1704         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1705             $hooks->{$1} = 1;
1706         } else {
1707             # simply ignore the rest
1708             return;
1709         }
1710     };
1711
1712     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1713
1714     return wantarray ? ($res, $hooks) : $res;
1715 }
1716
1717 sub iptables_chain_digest {
1718     my ($rules) = @_;
1719     my $digest = Digest::SHA->new('sha1');
1720     foreach my $rule (@$rules) { # order is important
1721         $digest->add($rule);
1722     }
1723     return $digest->b64digest;
1724 }
1725
1726 sub ipset_chain_digest {
1727     my ($rules) = @_;
1728
1729     my $digest = Digest::SHA->new('sha1');
1730     foreach my $rule (sort @$rules) { # note: sorted
1731         $digest->add($rule);
1732     }
1733     return $digest->b64digest;
1734 }
1735
1736 sub ipset_get_chains {
1737
1738     my $res = {};
1739     my $chains = {};
1740
1741     my $parser = sub {
1742         my $line = shift;
1743
1744         return if $line =~ m/^#/;
1745         return if $line =~ m/^\s*$/;
1746         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1747             my $chain = $1;
1748             $line =~ s/\s+$//; # delete trailing white space
1749             push @{$chains->{$chain}}, $line;
1750         } else {
1751             # simply ignore the rest
1752             return;
1753         }
1754     };
1755
1756     run_command("/sbin/ipset save", outfunc => $parser);
1757
1758     # compute digest for each chain
1759     foreach my $chain (keys %$chains) {
1760         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1761     }
1762
1763     return $res;
1764 }
1765
1766 sub ruleset_generate_cmdstr {
1767     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1768
1769     return if defined($rule->{enable}) && !$rule->{enable};
1770     return if $rule->{errors};
1771
1772     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1773
1774     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1775     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1776
1777     my @cmd = ();
1778
1779     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1780     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1781
1782     my $source = $rule->{source};
1783     my $dest = $rule->{dest};
1784
1785     if ($source) {
1786         if ($source =~ m/^\+/) {
1787             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1788                 my $name = $1;
1789                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1790                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1791                     push @cmd, "-m set --match-set ${ipset_chain} src";
1792                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1793                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1794                     push @cmd, "-m set --match-set ${ipset_chain} src";
1795                 } else {
1796                     die "no such ipset '$name'\n";
1797                 }
1798             } else {
1799                 die "invalid security group name '$source'\n";
1800             }
1801         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1802             my $alias = lc($source);
1803             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1804             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1805             die "no such alias '$source'\n" if !$e;
1806             push @cmd, "-s $e->{cidr}";
1807         } elsif ($source =~ m/\-/){
1808             push @cmd, "-m iprange --src-range $source";
1809         } else {
1810             push @cmd, "-s $source";
1811         }
1812     }
1813
1814     if ($dest) {
1815         if ($dest =~ m/^\+/) {
1816             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1817                 my $name = $1;
1818                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1819                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1820                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1821                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1822                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1823                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1824                 } else {
1825                     die "no such ipset '$name'\n";
1826                 }
1827             } else {
1828                 die "invalid security group name '$dest'\n";
1829             }
1830         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1831             my $alias = lc($dest);
1832             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1833             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1834             die "no such alias '$dest'\n" if !$e;
1835             push @cmd, "-d $e->{cidr}";
1836         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1837             push @cmd, "-m iprange --dst-range $dest";
1838         } else {
1839             push @cmd, "-d $dest";
1840         }
1841     }
1842
1843     if ($rule->{proto}) {
1844         push @cmd, "-p $rule->{proto}";
1845
1846         my $multiport = 0;
1847         $multiport++ if $nbdport > 1;
1848         $multiport++ if $nbsport > 1;
1849
1850         push @cmd, "--match multiport" if $multiport;
1851
1852         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1853             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1854
1855         if ($rule->{dport}) {
1856             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1857                 # Note: we use dport to store --icmp-type
1858                 die "unknown icmp-type '$rule->{dport}'\n"
1859                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1860                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1861             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1862                 # Note: we use dport to store --icmpv6-type
1863                 die "unknown icmpv6-type '$rule->{dport}'\n"
1864                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1865                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1866             } else {
1867                 if ($nbdport > 1) {
1868                     if ($multiport == 2) {
1869                         push @cmd,  "--ports $rule->{dport}";
1870                     } else {
1871                         push @cmd, "--dports $rule->{dport}";
1872                     }
1873                 } else {
1874                     push @cmd, "--dport $rule->{dport}";
1875                 }
1876             }
1877         }
1878
1879         if ($rule->{sport}) {
1880             if ($nbsport > 1) {
1881                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1882             } else {
1883                 push @cmd, "--sport $rule->{sport}";
1884             }
1885         }
1886     } elsif ($rule->{dport} || $rule->{sport}) {
1887         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1888         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1889     }
1890
1891     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1892
1893     if (my $action = $rule->{action}) {
1894         $action = $actions->{$action} if defined($actions->{$action});
1895         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1896         push @cmd, $goto ? "-g $action" : "-j $action";
1897     }
1898
1899     return scalar(@cmd) ? join(' ', @cmd) : undef;
1900 }
1901
1902 sub ruleset_generate_rule {
1903     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1904
1905     my $rules;
1906
1907     if ($rule->{macro}) {
1908         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1909     } else {
1910         $rules = [ $rule ];
1911     }
1912
1913     # update all or nothing
1914
1915     my @cmds = ();
1916     foreach my $tmp (@$rules) {
1917         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1918             push @cmds, $cmdstr;
1919         }
1920     }
1921
1922     foreach my $cmdstr (@cmds) {
1923         ruleset_addrule($ruleset, $chain, $cmdstr);
1924     }
1925 }
1926
1927 sub ruleset_generate_rule_insert {
1928     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1929
1930     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1931
1932     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1933         ruleset_insertrule($ruleset, $chain, $cmdstr);
1934     }
1935 }
1936
1937 sub ruleset_create_chain {
1938     my ($ruleset, $chain) = @_;
1939
1940     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1941     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1942
1943     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1944
1945     $ruleset->{$chain} = [];
1946 }
1947
1948 sub ruleset_chain_exist {
1949     my ($ruleset, $chain) = @_;
1950
1951     return $ruleset->{$chain} ? 1 : undef;
1952 }
1953
1954 sub ruleset_addrule {
1955    my ($ruleset, $chain, $rule) = @_;
1956
1957    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1958
1959    push @{$ruleset->{$chain}}, "-A $chain $rule";
1960 }
1961
1962 sub ruleset_insertrule {
1963    my ($ruleset, $chain, $rule) = @_;
1964
1965    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1966
1967    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1968 }
1969
1970 sub get_log_rule_base {
1971     my ($chain, $vmid, $msg, $loglevel) = @_;
1972
1973     die "internal error - no log level" if !defined($loglevel);
1974
1975     $vmid = 0 if !defined($vmid);
1976
1977     # Note: we use special format for prefix to pass further
1978     # info to log daemon (VMID, LOGVELEL and CHAIN)
1979
1980     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1981 }
1982
1983 sub ruleset_addlog {
1984     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1985
1986     return if !defined($loglevel);
1987
1988     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1989
1990     $logrule = "$rule $logrule" if defined($rule);
1991
1992     ruleset_addrule($ruleset, $chain, $logrule);
1993 }
1994
1995 sub ruleset_add_chain_policy {
1996     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1997
1998     if ($policy eq 'ACCEPT') {
1999
2000         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2001                               { ACCEPT =>  $accept_action});
2002
2003     } elsif ($policy eq 'DROP') {
2004
2005         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
2006
2007         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2008
2009         ruleset_addrule($ruleset, $chain, "-j DROP");
2010     } elsif ($policy eq 'REJECT') {
2011         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2012
2013         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2014
2015         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2016     } else {
2017         # should not happen
2018         die "internal error: unknown policy '$policy'";
2019     }
2020 }
2021
2022 sub ruleset_chain_add_ndp {
2023     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2024     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2025
2026     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2027     if ($direction ne 'OUT' || $options->{radv}) {
2028         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2029     }
2030     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2031     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2032 }
2033
2034 sub ruleset_chain_add_conn_filters {
2035     my ($ruleset, $chain, $accept) = @_;
2036
2037     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2038     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2039 }
2040
2041 sub ruleset_chain_add_input_filters {
2042     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2043
2044     if ($cluster_conf->{ipset}->{blacklist}){
2045         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2046             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2047             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2048             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2049         }
2050         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2051         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2052     }
2053
2054     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2055         if ($ipversion == 4) {
2056             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2057         }
2058     }
2059
2060     if ($options->{tcpflags}) {
2061         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2062     }
2063 }
2064
2065 sub ruleset_create_vm_chain {
2066     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2067
2068     ruleset_create_chain($ruleset, $chain);
2069     my $accept = generate_nfqueue($options);
2070
2071     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2072         if ($ipversion == 4) {
2073             if ($direction eq 'OUT') {
2074                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2075                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2076                                         proto => 'udp', sport => 68, dport => 67 });
2077             } else {
2078                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2079                                       { action => 'ACCEPT',
2080                                         proto => 'udp', sport => 67, dport => 68 });
2081             }
2082         } elsif ($ipversion == 6) {
2083             if ($direction eq 'OUT') {
2084                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2085                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2086                                         proto => 'udp', sport => 546, dport => 547 });
2087             } else {
2088                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2089                                       { action => 'ACCEPT',
2090                                         proto => 'udp', sport => 547, dport => 546 });
2091             }
2092         }
2093
2094     }
2095
2096     if ($direction eq 'OUT') {
2097         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2098             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2099         }
2100         if ($ipversion == 6 && !$options->{radv}) {
2101             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2102         }
2103         if ($ipfilter_ipset) {
2104             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2105         }
2106         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2107     }
2108
2109     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2110     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2111 }
2112
2113 sub ruleset_add_group_rule {
2114     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2115
2116     my $group = $rule->{action};
2117     my $group_chain = "GROUP-$group-$direction";
2118     if(!ruleset_chain_exist($ruleset, $group_chain)){
2119         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2120     }
2121
2122     if ($direction eq 'OUT' && $rule->{iface_out}) {
2123         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2124     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2125         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2126     } else {
2127         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2128     }
2129
2130     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2131 }
2132
2133 sub ruleset_generate_vm_rules {
2134     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2135
2136     my $lc_direction = lc($direction);
2137
2138     my $in_accept = generate_nfqueue($options);
2139
2140     foreach my $rule (@$rules) {
2141         next if $rule->{iface} && $rule->{iface} ne $netid;
2142         next if !$rule->{enable} || $rule->{errors};
2143         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2144
2145         if ($rule->{type} eq 'group') {
2146             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2147                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2148         } else {
2149             next if $rule->{type} ne $lc_direction;
2150             eval {
2151                 if ($direction eq 'OUT') {
2152                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2153                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2154                                           undef, $cluster_conf, $vmfw_conf);
2155                 } else {
2156                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2157                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2158                                           undef, $cluster_conf, $vmfw_conf);
2159                 }
2160             };
2161             warn $@ if $@;
2162         }
2163     }
2164 }
2165
2166 sub generate_nfqueue {
2167     my ($options) = @_;
2168
2169     if ($options->{ips}) {
2170         my $action = "NFQUEUE";
2171         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2172             if (defined($3) && defined($1)) {
2173                 $action .= " --queue-balance $1:$3";
2174             } elsif (defined($1)) {
2175                 $action .= " --queue-num $1";
2176             }
2177         }
2178         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2179         return $action;
2180     } else {
2181         return "ACCEPT";
2182     }
2183 }
2184
2185 sub ruleset_generate_vm_ipsrules {
2186     my ($ruleset, $options, $direction, $iface) = @_;
2187
2188     if ($options->{ips} && $direction eq 'IN') {
2189         my $nfqueue = generate_nfqueue($options);
2190
2191         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2192             ruleset_create_chain($ruleset, "PVEFW-IPS");
2193         }
2194
2195         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2196     }
2197 }
2198
2199 sub generate_tap_rules_direction {
2200     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2201
2202     my $lc_direction = lc($direction);
2203
2204     my $rules = $vmfw_conf->{rules};
2205
2206     my $options = $vmfw_conf->{options};
2207     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2208
2209     my $tapchain = "$iface-$direction";
2210
2211     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2212     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2213         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2214
2215     # create chain with mac and ip filter
2216     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2217
2218     if ($options->{enable}) {
2219         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2220
2221         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2222
2223         # implement policy
2224         my $policy;
2225
2226         if ($direction eq 'OUT') {
2227             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2228         } else {
2229         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2230         }
2231
2232         my $accept = generate_nfqueue($options);
2233         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2234         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2235     } else {
2236         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2237         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2238     }
2239
2240     # plug the tap chain to bridge chain
2241     if ($direction eq 'IN') {
2242         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2243                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2244     } else {
2245         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2246                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2247     }
2248 }
2249
2250 sub enable_host_firewall {
2251     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2252
2253     my $options = $hostfw_conf->{options};
2254     my $cluster_options = $cluster_conf->{options};
2255     my $rules = $hostfw_conf->{rules};
2256     my $cluster_rules = $cluster_conf->{rules};
2257
2258     # host inbound firewall
2259     my $chain = "PVEFW-HOST-IN";
2260     ruleset_create_chain($ruleset, $chain);
2261
2262     my $loglevel = get_option_log_level($options, "log_level_in");
2263
2264     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2265
2266     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2267     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2268     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2269
2270     # we use RETURN because we need to check also tap rules
2271     my $accept_action = 'RETURN';
2272
2273     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2274
2275     # add host rules first, so that cluster wide rules can be overwritten
2276     foreach my $rule (@$rules, @$cluster_rules) {
2277         next if !$rule->{enable} || $rule->{errors};
2278         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2279
2280         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2281
2282         eval {
2283             if ($rule->{type} eq 'group') {
2284                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2285             } elsif ($rule->{type} eq 'in') {
2286                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2287                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2288                                       undef, $cluster_conf, $hostfw_conf);
2289             }
2290         };
2291         warn $@ if $@;
2292         delete $rule->{iface_in};
2293     }
2294
2295     # allow standard traffic for management ipset (includes cluster network)
2296     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2297     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2298     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2299     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2300     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2301     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2302
2303     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2304     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2305
2306     # corosync
2307     if ($localnet && ($ipversion == $localnet_ver)) {
2308         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2309         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2310         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2311     }
2312
2313     # implement input policy
2314     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2315     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2316
2317     # host outbound firewall
2318     $chain = "PVEFW-HOST-OUT";
2319     ruleset_create_chain($ruleset, $chain);
2320
2321     $loglevel = get_option_log_level($options, "log_level_out");
2322
2323     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2324
2325     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2326
2327     # we use RETURN because we may want to check other thigs later
2328     $accept_action = 'RETURN';
2329     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2330
2331     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2332
2333     # add host rules first, so that cluster wide rules can be overwritten
2334     foreach my $rule (@$rules, @$cluster_rules) {
2335         next if !$rule->{enable} || $rule->{errors};
2336         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2337
2338         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2339         eval {
2340             if ($rule->{type} eq 'group') {
2341                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2342             } elsif ($rule->{type} eq 'out') {
2343                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2344                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2345                                       undef, $cluster_conf, $hostfw_conf);
2346             }
2347         };
2348         warn $@ if $@;
2349         delete $rule->{iface_out};
2350     }
2351
2352     # allow standard traffic on cluster network
2353     if ($localnet && ($ipversion == $localnet_ver)) {
2354         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2355         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2356         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2357         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2358
2359         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2360         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2361         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2362     }
2363
2364     # implement output policy
2365     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2366     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2367
2368     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2369     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2370 }
2371
2372 sub generate_group_rules {
2373     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2374
2375     my $rules = $cluster_conf->{groups}->{$group};
2376
2377     if (!$rules) {
2378         warn "no such security group '$group'\n";
2379         $rules = []; # create empty chain
2380     }
2381
2382     my $chain = "GROUP-${group}-IN";
2383
2384     ruleset_create_chain($ruleset, $chain);
2385     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2386
2387     foreach my $rule (@$rules) {
2388         next if $rule->{type} ne 'in';
2389         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2390         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2391                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2392                               undef, $cluster_conf);
2393     }
2394
2395     $chain = "GROUP-${group}-OUT";
2396
2397     ruleset_create_chain($ruleset, $chain);
2398     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2399
2400     foreach my $rule (@$rules) {
2401         next if $rule->{type} ne 'out';
2402         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2403         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2404         # check also other tap rules later
2405         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2406                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2407                               undef, $cluster_conf);
2408     }
2409 }
2410
2411 my $MAX_NETS = 32;
2412 my $valid_netdev_names = {};
2413 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2414     $valid_netdev_names->{"net$i"} = 1;
2415 }
2416
2417 sub get_mark_values {
2418     my ($value, $mask) = @_;
2419     $value = hex($value) if $value =~ /^0x/;
2420     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2421     $mask = 0xffffffff if !defined($mask);
2422     return ($value, $mask);
2423 }
2424
2425 sub parse_fw_rule {
2426     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2427
2428     my $orig_line = $line;
2429
2430     my $rule = {};
2431
2432     # we can add single line comments to the end of the rule
2433     if ($line =~ s/#\s*(.*?)\s*$//) {
2434         $rule->{comment} = decode('utf8', $1);
2435     }
2436
2437     # we can disable a rule when prefixed with '|'
2438
2439     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2440
2441     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2442         die "unable to parse rule: $line\n";
2443
2444     $rule->{type} = lc($1);
2445     $rule->{action} = $2;
2446
2447     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2448         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2449             $rule->{macro} = $1;
2450             $rule->{action} = $2;
2451         }
2452     }
2453
2454     while (length($line)) {
2455         if ($line =~ s/^-i (\S+)\s*//) {
2456             $rule->{iface} = $1;
2457             next;
2458         }
2459
2460         last if $rule->{type} eq 'group';
2461
2462         if ($line =~ s/^-p (\S+)\s*//) {
2463             $rule->{proto} = $1;
2464             next;
2465         }
2466
2467         if ($line =~ s/^-dport (\S+)\s*//) {
2468             $rule->{dport} = $1;
2469             next;
2470         }
2471
2472         if ($line =~ s/^-sport (\S+)\s*//) {
2473             $rule->{sport} = $1;
2474             next;
2475         }
2476         if ($line =~ s/^-source (\S+)\s*//) {
2477             $rule->{source} = $1;
2478             next;
2479         }
2480         if ($line =~ s/^-dest (\S+)\s*//) {
2481             $rule->{dest} = $1;
2482             next;
2483         }
2484
2485         last;
2486     }
2487
2488     die "unable to parse rule parameters: $line\n" if length($line);
2489
2490     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2491     if ($verbose && $rule->{errors}) {
2492         warn "$prefix - errors in rule parameters: $orig_line\n";
2493         foreach my $p (keys %{$rule->{errors}}) {
2494             warn "  $p: $rule->{errors}->{$p}\n";
2495         }
2496     }
2497
2498     return $rule;
2499 }
2500
2501 sub parse_vmfw_option {
2502     my ($line) = @_;
2503
2504     my ($opt, $value);
2505
2506     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2507
2508     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2509         $opt = lc($1);
2510         $value = int($2);
2511     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2512         $opt = lc($1);
2513         $value = $2 ? lc($3) : '';
2514     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2515         $opt = lc($1);
2516         $value = uc($3);
2517     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2518         $opt = lc($1);
2519         $value = $2;
2520     } else {
2521         die "can't parse option '$line'\n"
2522     }
2523
2524     return ($opt, $value);
2525 }
2526
2527 sub parse_hostfw_option {
2528     my ($line) = @_;
2529
2530     my ($opt, $value);
2531
2532     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2533
2534     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2535         $opt = lc($1);
2536         $value = int($2);
2537     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2538         $opt = lc($1);
2539         $value = $2 ? lc($3) : '';
2540     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2541         $opt = lc($1);
2542         $value = int($2);
2543     } else {
2544         die "can't parse option '$line'\n"
2545     }
2546
2547     return ($opt, $value);
2548 }
2549
2550 sub parse_clusterfw_option {
2551     my ($line) = @_;
2552
2553     my ($opt, $value);
2554
2555     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2556         $opt = lc($1);
2557         $value = int($2);
2558         if (($value > 1) && ((time() - $value) > 60)) {
2559             $value = 0
2560         }
2561     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2562         $opt = lc($1);
2563         $value = uc($3);
2564     } else {
2565         die "can't parse option '$line'\n"
2566     }
2567
2568     return ($opt, $value);
2569 }
2570
2571 sub resolve_alias {
2572     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2573
2574     my $alias = lc($cidr);
2575     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2576     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2577
2578     die "no such alias '$cidr'\n" if !$e;;
2579
2580     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2581 }
2582
2583 sub parse_ip_or_cidr {
2584     my ($cidr) = @_;
2585
2586     my $ipversion;
2587
2588     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2589         $cidr =~ s|/128$||;
2590         $ipversion = 6;
2591     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2592         $cidr =~ s|/32$||;
2593         $ipversion = 4;
2594     } else {
2595         die "value does not look like a valid IP address or CIDR network\n";
2596     }
2597
2598     return wantarray ? ($cidr, $ipversion) : $cidr;
2599 }
2600
2601 sub parse_alias {
2602     my ($line) = @_;
2603
2604     # we can add single line comments to the end of the line
2605     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2606
2607     if ($line =~ m/^(\S+)\s(\S+)$/) {
2608         my ($name, $cidr) = ($1, $2);
2609         my $ipversion;
2610
2611         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2612
2613         my $data = {
2614             name => $name,
2615             cidr => $cidr,
2616             ipversion => $ipversion,
2617         };
2618         $data->{comment} = $comment  if $comment;
2619         return $data;
2620     }
2621
2622     return undef;
2623 }
2624
2625 sub generic_fw_config_parser {
2626     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2627
2628     my $section;
2629     my $group;
2630
2631     my $res = $empty_conf;
2632
2633     while (defined(my $line = <$fh>)) {
2634         next if $line =~ m/^#/;
2635         next if $line =~ m/^\s*$/;
2636
2637         chomp $line;
2638
2639         my $linenr = $fh->input_line_number();
2640         my $prefix = "$filename (line $linenr)";
2641
2642         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2643             $section = 'options';
2644             next;
2645         }
2646
2647         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2648             $section = 'aliases';
2649             next;
2650         }
2651
2652         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2653             $section = 'groups';
2654             $group = lc($1);
2655             my $comment = $2;
2656             eval {
2657                 die "security group name too long\n" if length($group) > $max_group_name_length;
2658                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2659             };
2660             if (my $err = $@) {
2661                 ($section, $group, $comment) = undef;
2662                 warn "$prefix: $err";
2663                 next;
2664             }
2665
2666             $res->{$section}->{$group} = [];
2667             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2668                 if $comment;
2669             next;
2670         }
2671
2672         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2673             $section = 'rules';
2674             next;
2675         }
2676
2677         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2678             $section = 'ipset';
2679             $group = lc($1);
2680             my $comment = $2;
2681             eval {
2682                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2683                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2684             };
2685             if (my $err = $@) {
2686                 ($section, $group, $comment) = undef;
2687                 warn "$prefix: $err";
2688                 next;
2689             }
2690
2691             $res->{$section}->{$group} = [];
2692             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2693                 if $comment;
2694             next;
2695         }
2696
2697         if (!$section) {
2698             warn "$prefix: skip line - no section\n";
2699             next;
2700         }
2701
2702         if ($section eq 'options') {
2703             eval {
2704                 my ($opt, $value);
2705                 if ($rule_env eq 'cluster') {
2706                     ($opt, $value) = parse_clusterfw_option($line);
2707                 } elsif ($rule_env eq 'host') {
2708                     ($opt, $value) = parse_hostfw_option($line);
2709                 } else {
2710                     ($opt, $value) = parse_vmfw_option($line);
2711                 }
2712                 $res->{options}->{$opt} = $value;
2713             };
2714             warn "$prefix: $@" if $@;
2715         } elsif ($section eq 'aliases') {
2716             eval {
2717                 my $data = parse_alias($line);
2718                 $res->{aliases}->{lc($data->{name})} = $data;
2719             };
2720             warn "$prefix: $@" if $@;
2721         } elsif ($section eq 'rules') {
2722             my $rule;
2723             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2724             if (my $err = $@) {
2725                 warn "$prefix: $err";
2726                 next;
2727             }
2728             push @{$res->{$section}}, $rule;
2729         } elsif ($section eq 'groups') {
2730             my $rule;
2731             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2732             if (my $err = $@) {
2733                 warn "$prefix: $err";
2734                 next;
2735             }
2736             push @{$res->{$section}->{$group}}, $rule;
2737         } elsif ($section eq 'ipset') {
2738             # we can add single line comments to the end of the rule
2739             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2740
2741             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2742             my $nomatch = $1;
2743             my $cidr = $2;
2744             my $errors;
2745
2746             if ($nomatch && !$feature_ipset_nomatch) {
2747                 $errors->{nomatch} = "nomatch not supported by kernel";
2748             }
2749
2750             eval {
2751                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2752                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2753                 } else {
2754                     $cidr = parse_ip_or_cidr($cidr);
2755                 }
2756             };
2757             if (my $err = $@) {
2758                 chomp $err;
2759                 $errors->{cidr} = $err;
2760             }
2761
2762             my $entry = { cidr => $cidr };
2763             $entry->{nomatch} = 1 if $nomatch;
2764             $entry->{comment} = $comment if $comment;
2765             $entry->{errors} =  $errors if $errors;
2766
2767             if ($verbose && $errors) {
2768                 warn "$prefix - errors in ipset '$group': $line\n";
2769                 foreach my $p (keys %{$errors}) {
2770                     warn "  $p: $errors->{$p}\n";
2771                 }
2772             }
2773
2774             push @{$res->{$section}->{$group}}, $entry;
2775         } else {
2776             warn "$prefix: skip line - unknown section\n";
2777             next;
2778         }
2779     }
2780
2781     return $res;
2782 }
2783
2784 sub parse_hostfw_config {
2785     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2786
2787     my $empty_conf = { rules => [], options => {}};
2788
2789     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2790 }
2791
2792 sub parse_vmfw_config {
2793     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2794
2795     my $empty_conf = {
2796         rules => [],
2797         options => {},
2798         aliases => {},
2799         ipset => {} ,
2800         ipset_comments => {},
2801     };
2802
2803     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2804 }
2805
2806 sub parse_clusterfw_config {
2807     my ($filename, $fh, $verbose) = @_;
2808
2809     my $section;
2810     my $group;
2811
2812     my $empty_conf = {
2813         rules => [],
2814         options => {},
2815         aliases => {},
2816         groups => {},
2817         group_comments => {},
2818         ipset => {} ,
2819         ipset_comments => {},
2820     };
2821
2822     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2823 }
2824
2825 sub run_locked {
2826     my ($code, @param) = @_;
2827
2828     my $timeout = 10;
2829
2830     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2831
2832     die $@ if $@;
2833
2834     return $res;
2835 }
2836
2837 sub read_local_vm_config {
2838
2839     my $qemu = {};
2840     my $lxc = {};
2841
2842     my $vmdata = { qemu => $qemu, lxc => $lxc };
2843
2844     my $vmlist = PVE::Cluster::get_vmlist();
2845     return $vmdata if !$vmlist || !$vmlist->{ids};
2846     my $ids = $vmlist->{ids};
2847
2848     foreach my $vmid (keys %$ids) {
2849         next if !$vmid; # skip VE0
2850         my $d = $ids->{$vmid};
2851         next if !$d->{node} || $d->{node} ne $nodename;
2852         next if !$d->{type};
2853         if ($d->{type} eq 'qemu') {
2854             if ($have_qemu_server) {
2855                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2856                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2857                     $qemu->{$vmid} = $conf;
2858                 }
2859             }
2860         } elsif ($d->{type} eq 'lxc') {
2861             if ($have_lxc) {
2862                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2863                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2864                     $lxc->{$vmid} = $conf;
2865                 }
2866             }
2867         }
2868     }
2869
2870     return $vmdata;
2871 };
2872
2873 sub load_vmfw_conf {
2874     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2875
2876     my $vmfw_conf = {};
2877
2878     $dir = $pvefw_conf_dir if !defined($dir);
2879
2880     my $filename = "$dir/$vmid.fw";
2881     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2882         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2883         $vmfw_conf->{vmid} = $vmid;
2884     }
2885
2886     return $vmfw_conf;
2887 }
2888
2889 my $format_rules = sub {
2890     my ($rules, $allow_iface) = @_;
2891
2892     my $raw = '';
2893
2894     foreach my $rule (@$rules) {
2895         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2896             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2897             $raw .= uc($rule->{type});
2898             if ($rule->{macro}) {
2899                 $raw .= " $rule->{macro}($rule->{action})";
2900             } else {
2901                 $raw .= " " . $rule->{action};
2902             }
2903             if ($allow_iface && $rule->{iface}) {
2904                 $raw .= " -i $rule->{iface}";
2905             }
2906
2907             if ($rule->{type} ne  'group')  {
2908                 $raw .= " -source $rule->{source}" if $rule->{source};
2909                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2910                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2911                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2912                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2913             }
2914
2915             $raw .= " # " . encode('utf8', $rule->{comment})
2916                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2917             $raw .= "\n";
2918         } else {
2919             die "unknown rule type '$rule->{type}'";
2920         }
2921     }
2922
2923     return $raw;
2924 };
2925
2926 my $format_options = sub {
2927     my ($options) = @_;
2928
2929     my $raw = '';
2930
2931     $raw .= "[OPTIONS]\n\n";
2932     foreach my $opt (keys %$options) {
2933         $raw .= "$opt: $options->{$opt}\n";
2934     }
2935     $raw .= "\n";
2936
2937     return $raw;
2938 };
2939
2940 my $format_aliases = sub {
2941     my ($aliases) = @_;
2942
2943     my $raw = '';
2944
2945     $raw .= "[ALIASES]\n\n";
2946     foreach my $k (keys %$aliases) {
2947         my $e = $aliases->{$k};
2948         $raw .= "$e->{name} $e->{cidr}";
2949         $raw .= " # " . encode('utf8', $e->{comment})
2950             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2951         $raw .= "\n";
2952     }
2953     $raw .= "\n";
2954
2955     return $raw;
2956 };
2957
2958 my $format_ipsets = sub {
2959     my ($fw_conf) = @_;
2960
2961     my $raw = '';
2962
2963     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2964         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2965             my $utf8comment = encode('utf8', $comment);
2966             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2967         } else {
2968             $raw .= "[IPSET $ipset]\n\n";
2969         }
2970         my $options = $fw_conf->{ipset}->{$ipset};
2971
2972         my $nethash = {};
2973         foreach my $entry (@$options) {
2974             $nethash->{$entry->{cidr}} = $entry;
2975         }
2976
2977         foreach my $cidr (sort keys %$nethash) {
2978             my $entry = $nethash->{$cidr};
2979             my $line = $entry->{nomatch} ? '!' : '';
2980             $line .= $entry->{cidr};
2981             $line .= " # " . encode('utf8', $entry->{comment})
2982                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2983             $raw .= "$line\n";
2984         }
2985
2986         $raw .= "\n";
2987     }
2988
2989     return $raw;
2990 };
2991
2992 sub save_vmfw_conf {
2993     my ($vmid, $vmfw_conf) = @_;
2994
2995     my $raw = '';
2996
2997     my $options = $vmfw_conf->{options};
2998     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2999
3000     my $aliases = $vmfw_conf->{aliases};
3001     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3002
3003     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3004
3005     my $rules = $vmfw_conf->{rules} || [];
3006     if ($rules && scalar(@$rules)) {
3007         $raw .= "[RULES]\n\n";
3008         $raw .= &$format_rules($rules, 1);
3009         $raw .= "\n";
3010     }
3011
3012     my $filename = "$pvefw_conf_dir/$vmid.fw";
3013     if ($raw) {
3014         mkdir $pvefw_conf_dir;
3015         PVE::Tools::file_set_contents($filename, $raw);
3016     } else {
3017         unlink $filename;
3018     }
3019 }
3020
3021 sub remove_vmfw_conf {
3022     my ($vmid) = @_;
3023
3024     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3025
3026     unlink $vmfw_conffile;
3027 }
3028
3029 sub clone_vmfw_conf {
3030     my ($vmid, $newid) = @_;
3031
3032     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3033     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3034
3035     if (-f $clonevm_conffile) {
3036         unlink $clonevm_conffile;
3037     }
3038     if (-f $sourcevm_conffile) {
3039         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3040         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3041     }
3042 }
3043
3044 sub read_vm_firewall_configs {
3045     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3046
3047     my $vmfw_configs = {};
3048
3049     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3050         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3051         next if !$vmfw_conf->{options}; # skip if file does not exists
3052         $vmfw_configs->{$vmid} = $vmfw_conf;
3053     }
3054     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3055         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3056         next if !$vmfw_conf->{options}; # skip if file does not exists
3057         $vmfw_configs->{$vmid} = $vmfw_conf;
3058     }
3059
3060     return $vmfw_configs;
3061 }
3062
3063 sub get_option_log_level {
3064     my ($options, $k) = @_;
3065
3066     my $v = $options->{$k};
3067     $v = $default_log_level if !defined($v);
3068
3069     return undef if $v eq '' || $v eq 'nolog';
3070
3071     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3072
3073     return $v if ($v >= 0) && ($v <= 7);
3074
3075     warn "unknown log level ($k = '$v')\n";
3076
3077     return undef;
3078 }
3079
3080 sub generate_std_chains {
3081     my ($ruleset, $options, $ipversion) = @_;
3082
3083     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3084
3085     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3086
3087     my $chain;
3088
3089     if ($ipversion == 4) {
3090         # same as shorewall smurflog.
3091         $chain = 'PVEFW-smurflog';
3092         $std_chains->{$chain} = [];
3093
3094         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3095         push @{$std_chains->{$chain}}, "-j DROP";
3096     }
3097
3098     # same as shorewall logflags action.
3099     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3100     $chain = 'PVEFW-logflags';
3101     $std_chains->{$chain} = [];
3102
3103     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3104     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3105     push @{$std_chains->{$chain}}, "-j DROP";
3106
3107     foreach my $chain (keys %$std_chains) {
3108         ruleset_create_chain($ruleset, $chain);
3109         foreach my $rule (@{$std_chains->{$chain}}) {
3110             if (ref($rule)) {
3111                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3112             } else {
3113                 ruleset_addrule($ruleset, $chain, $rule);
3114             }
3115         }
3116     }
3117 }
3118
3119 sub generate_ipset_chains {
3120     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3121
3122     foreach my $ipset (keys %{$ipsets}) {
3123
3124         my $options = $ipsets->{$ipset};
3125
3126         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3127             if (my $ips = $device_ips->{$1}) {
3128                 $options = [@$options, @$ips];
3129             }
3130         }
3131
3132         # remove duplicates
3133         my $nethash = {};
3134         foreach my $entry (@$options) {
3135             next if $entry->{errors}; # skip entries with errors
3136             eval {
3137                 my ($cidr, $ver);
3138                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3139                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3140                 } else {
3141                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3142                 }
3143                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3144                 if ($ver == 6) {
3145                     # ip_compress_address takes an address only, no CIDR
3146                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3147                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3148                     $cidr .= $prefix_len if defined($prefix_len);
3149                     $cidr =~ s|/128$||;
3150                 } else {
3151                     $cidr =~ s|/32$||;
3152                 }
3153
3154                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3155             };
3156             warn $@ if $@;
3157         }
3158
3159         foreach my $ipversion (4, 6) {
3160             my $data = $nethash->{$ipversion};
3161
3162             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3163
3164             my $hashsize = scalar(@$options);
3165             if ($hashsize <= 64) {
3166                 $hashsize = 64;
3167             } else {
3168                 $hashsize = round_powerof2($hashsize);
3169             }
3170
3171             my $family = $ipversion == "6" ? "inet6" : "inet";
3172
3173             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3174
3175             foreach my $cidr (sort keys %$data) {
3176                 my $entry = $data->{$cidr};
3177
3178                 my $cmd = "add $name $cidr";
3179                 if ($entry->{nomatch}) {
3180                     if ($feature_ipset_nomatch) {
3181                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3182                     } else {
3183                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3184                     }
3185                 } else {
3186                     push @{$ipset_ruleset->{$name}}, $cmd;
3187                 }
3188             }
3189         }
3190     }
3191 }
3192
3193 sub round_powerof2 {
3194     my ($int) = @_;
3195
3196     $int--;
3197     $int |= $int >> $_ foreach (1,2,4,8,16);
3198     return ++$int;
3199 }
3200
3201 sub load_clusterfw_conf {
3202     my ($filename, $verbose) = @_;
3203
3204     $filename = $clusterfw_conf_filename if !defined($filename);
3205
3206     my $cluster_conf = {};
3207     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3208         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3209     }
3210
3211     return $cluster_conf;
3212 }
3213
3214 sub save_clusterfw_conf {
3215     my ($cluster_conf) = @_;
3216
3217     my $raw = '';
3218
3219     my $options = $cluster_conf->{options};
3220     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3221
3222     my $aliases = $cluster_conf->{aliases};
3223     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3224
3225     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3226
3227     my $rules = $cluster_conf->{rules};
3228     if ($rules && scalar(@$rules)) {
3229         $raw .= "[RULES]\n\n";
3230         $raw .= &$format_rules($rules, 1);
3231         $raw .= "\n";
3232     }
3233
3234     if ($cluster_conf->{groups}) {
3235         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3236             my $rules = $cluster_conf->{groups}->{$group};
3237             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3238                 my $utf8comment = encode('utf8', $comment);
3239                 $raw .= "[group $group] # $utf8comment\n\n";
3240             } else {
3241                 $raw .= "[group $group]\n\n";
3242             }
3243
3244             $raw .= &$format_rules($rules, 0);
3245             $raw .= "\n";
3246         }
3247     }
3248
3249     if ($raw) {
3250         mkdir $pvefw_conf_dir;
3251         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3252     } else {
3253         unlink $clusterfw_conf_filename;
3254     }
3255 }
3256
3257 sub load_hostfw_conf {
3258     my ($cluster_conf, $filename, $verbose) = @_;
3259
3260     $filename = $hostfw_conf_filename if !defined($filename);
3261
3262     my $hostfw_conf = {};
3263     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3264         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3265     }
3266     return $hostfw_conf;
3267 }
3268
3269 sub save_hostfw_conf {
3270     my ($hostfw_conf) = @_;
3271
3272     my $raw = '';
3273
3274     my $options = $hostfw_conf->{options};
3275     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3276
3277     my $rules = $hostfw_conf->{rules};
3278     if ($rules && scalar(@$rules)) {
3279         $raw .= "[RULES]\n\n";
3280         $raw .= &$format_rules($rules, 1);
3281         $raw .= "\n";
3282     }
3283
3284     if ($raw) {
3285         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3286     } else {
3287         unlink $hostfw_conf_filename;
3288     }
3289 }
3290
3291 sub compile {
3292     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3293
3294     my $vmfw_configs;
3295
3296     if ($vmdata) { # test mode
3297         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3298         my $filename = "$testdir/cluster.fw";
3299         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3300
3301         $filename = "$testdir/host.fw";
3302         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3303
3304         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3305     } else { # normal operation
3306         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3307
3308         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3309
3310         $vmdata = read_local_vm_config();
3311         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3312     }
3313
3314     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3315
3316     my $localnet;
3317     if ($cluster_conf->{aliases}->{local_network}) {
3318         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3319     } else {
3320         my $localnet_ver;
3321         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3322
3323         $cluster_conf->{aliases}->{local_network} = {
3324             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3325     }
3326
3327     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3328
3329     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3330     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3331     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3332
3333     return ($ruleset, $ipset_ruleset, $rulesetv6);
3334 }
3335
3336 sub compile_iptables_filter {
3337     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3338
3339     my $ruleset = {};
3340
3341     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3342     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3343
3344     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3345
3346     my $hostfw_options = $hostfw_conf->{options} || {};
3347
3348     # fixme: what log level should we use here?
3349     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3350
3351     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3352
3353     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3354     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3355
3356     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3357
3358     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3359     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3360
3361     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3362
3363     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3364
3365     if ($hostfw_enable) {
3366         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3367         warn $@ if $@; # just to be sure - should not happen
3368     }
3369
3370     # generate firewall rules for QEMU VMs
3371     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3372         eval {
3373             my $conf = $vmdata->{qemu}->{$vmid};
3374             my $vmfw_conf = $vmfw_configs->{$vmid};
3375             return if !$vmfw_conf;
3376
3377             foreach my $netid (keys %$conf) {
3378                 next if $netid !~ m/^net(\d+)$/;
3379                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3380                 next if !$net->{firewall};
3381                 my $iface = "tap${vmid}i$1";
3382
3383                 my $macaddr = $net->{macaddr};
3384                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3385                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3386                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3387                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3388             }
3389         };
3390         warn $@ if $@; # just to be sure - should not happen
3391     }
3392
3393     # generate firewall rules for LXC containers
3394     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3395         eval {
3396             my $conf = $vmdata->{lxc}->{$vmid};
3397             my $vmfw_conf = $vmfw_configs->{$vmid};
3398             return if !$vmfw_conf;
3399
3400             if ($vmfw_conf->{options}->{enable}) {
3401                 foreach my $netid (keys %$conf) {
3402                     next if $netid !~ m/^net(\d+)$/;
3403                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3404                     next if !$net->{firewall};
3405                     my $iface = "veth${vmid}i$1";
3406                     my $macaddr = $net->{hwaddr};
3407                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3408                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3409                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3410                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3411                 }
3412             }
3413         };
3414         warn $@ if $@; # just to be sure - should not happen
3415     }
3416
3417     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3418         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3419     }
3420
3421     return $ruleset;
3422 }
3423
3424 sub mac_to_linklocal {
3425     my ($macaddr) = @_;
3426     my @parts = split(/:/, $macaddr);
3427     # The standard link local address uses the fe80::/64 prefix with the
3428     # modified EUI-64 identifier derived from the MAC address by flipping the
3429     # universal/local bit and inserting FF:FE in the middle.
3430     # See RFC 4291.
3431     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3432     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3433     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3434 }
3435
3436 sub compile_ipsets {
3437     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3438
3439     my $localnet;
3440     if ($cluster_conf->{aliases}->{local_network}) {
3441         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3442     } else {
3443         my $localnet_ver;
3444         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3445
3446         $cluster_conf->{aliases}->{local_network} = {
3447             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3448     }
3449
3450     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3451
3452
3453     my $ipset_ruleset = {};
3454
3455     # generate ipsets for QEMU VMs
3456     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3457         eval {
3458             my $conf = $vmdata->{qemu}->{$vmid};
3459             my $vmfw_conf = $vmfw_configs->{$vmid};
3460             return if !$vmfw_conf;
3461
3462             # When the 'ipfilter' option is enabled every device for which there
3463             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3464             # ipset.
3465             # The reason is that ipfilter ipsets are always filled with standard
3466             # IPv6 link-local filters.
3467             my $ipsets = $vmfw_conf->{ipset};
3468             my $implicit_sets = {};
3469
3470             my $device_ips = {};
3471             foreach my $netid (keys %$conf) {
3472                 next if $netid !~ m/^net(\d+)$/;
3473                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3474                 next if !$net->{firewall};
3475
3476                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3477                     $implicit_sets->{"ipfilter-$netid"} = [];
3478                 }
3479
3480                 my $macaddr = $net->{macaddr};
3481                 my $linklocal = mac_to_linklocal($macaddr);
3482                 $device_ips->{$netid} = [
3483                     { cidr => $linklocal },
3484                     { cidr => 'fe80::/10', nomatch => 1 }
3485                 ];
3486             }
3487
3488             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3489             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3490         };
3491         warn $@ if $@; # just to be sure - should not happen
3492     }
3493
3494     # generate firewall rules for LXC containers
3495     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3496         eval {
3497             my $conf = $vmdata->{lxc}->{$vmid};
3498             my $vmfw_conf = $vmfw_configs->{$vmid};
3499             return if !$vmfw_conf;
3500
3501             # When the 'ipfilter' option is enabled every device for which there
3502             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3503             # ipset.
3504             # The reason is that ipfilter ipsets are always filled with standard
3505             # IPv6 link-local filters, as well as the IP addresses configured
3506             # for the container.
3507             my $ipsets = $vmfw_conf->{ipset};
3508             my $implicit_sets = {};
3509
3510             my $device_ips = {};
3511             foreach my $netid (keys %$conf) {
3512                 next if $netid !~ m/^net(\d+)$/;
3513                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3514                 next if !$net->{firewall};
3515
3516                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3517                     $implicit_sets->{"ipfilter-$netid"} = [];
3518                 }
3519
3520                 my $macaddr = $net->{hwaddr};
3521                 my $linklocal = mac_to_linklocal($macaddr);
3522                 my $set = $device_ips->{$netid} = [
3523                     { cidr => $linklocal },
3524                     { cidr => 'fe80::/10', nomatch => 1 }
3525                 ];
3526                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3527                     push @$set, { cidr => $1 };
3528                 }
3529                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3530                     push @$set, { cidr => $1 };
3531                 }
3532             }
3533
3534             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3535             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3536         };
3537         warn $@ if $@; # just to be sure - should not happen
3538     }
3539
3540     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3541
3542     return $ipset_ruleset;
3543 }
3544
3545 sub get_ruleset_status {
3546     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3547
3548     my $statushash = {};
3549
3550     foreach my $chain (sort keys %$ruleset) {
3551         my $sig = &$digest_fn($ruleset->{$chain});
3552
3553         $statushash->{$chain}->{sig} = $sig;
3554
3555         my $oldsig = $active_chains->{$chain};
3556         if (!defined($oldsig)) {
3557             $statushash->{$chain}->{action} = 'create';
3558         } else {
3559             if ($oldsig eq $sig) {
3560                 $statushash->{$chain}->{action} = 'exists';
3561             } else {
3562                 $statushash->{$chain}->{action} = 'update';
3563             }
3564         }
3565         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3566         foreach my $cmd (@{$ruleset->{$chain}}) {
3567             print "\t$cmd\n" if $verbose;
3568         }
3569     }
3570
3571     foreach my $chain (sort keys %$active_chains) {
3572         if (!defined($ruleset->{$chain})) {
3573             my $sig = $active_chains->{$chain};
3574             $statushash->{$chain}->{action} = 'delete';
3575             $statushash->{$chain}->{sig} = $sig;
3576             print "delete $chain ($sig)\n" if $verbose;
3577         }
3578     }
3579
3580     return $statushash;
3581 }
3582
3583 sub print_sig_rule {
3584     my ($chain, $sig) = @_;
3585
3586     # We just use this to store a SHA1 checksum used to detect changes
3587     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3588 }
3589
3590 sub get_ruleset_cmdlist {
3591     my ($ruleset, $verbose, $iptablescmd) = @_;
3592
3593     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3594
3595     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3596     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3597
3598     # create missing chains first
3599     foreach my $chain (sort keys %$ruleset) {
3600         my $stat = $statushash->{$chain};
3601         die "internal error" if !$stat;
3602         next if $stat->{action} ne 'create';
3603
3604         $cmdlist .= ":$chain - [0:0]\n";
3605     }
3606
3607     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3608         my $chain = "PVEFW-$h";
3609         if ($ruleset->{$chain} && !$hooks->{$h}) {
3610             $cmdlist .= "-A $h -j $chain\n";
3611         }
3612     }
3613
3614     foreach my $chain (sort keys %$ruleset) {
3615         my $stat = $statushash->{$chain};
3616         die "internal error" if !$stat;
3617
3618         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3619             $cmdlist .= "-F $chain\n";
3620             foreach my $cmd (@{$ruleset->{$chain}}) {
3621                 $cmdlist .= "$cmd\n";
3622             }
3623             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3624         } elsif ($stat->{action} eq 'delete') {
3625             die "internal error"; # this should not happen
3626         } elsif ($stat->{action} eq 'exists') {
3627             # do nothing
3628         } else {
3629             die "internal error - unknown status '$stat->{action}'";
3630         }
3631     }
3632
3633     foreach my $chain (keys %$statushash) {
3634         next if $statushash->{$chain}->{action} ne 'delete';
3635         $cmdlist .= "-F $chain\n";
3636     }
3637     foreach my $chain (keys %$statushash) {
3638         next if $statushash->{$chain}->{action} ne 'delete';
3639         next if $chain eq 'PVEFW-INPUT';
3640         next if $chain eq 'PVEFW-OUTPUT';
3641         next if $chain eq 'PVEFW-FORWARD';
3642         $cmdlist .= "-X $chain\n";
3643     }
3644
3645     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3646
3647     $cmdlist .= "COMMIT\n";
3648
3649     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3650 }
3651
3652 sub get_ipset_cmdlist {
3653     my ($ruleset, $verbose) = @_;
3654
3655     my $cmdlist = "";
3656
3657     my $delete_cmdlist = "";
3658
3659     my $active_chains = ipset_get_chains();
3660     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3661
3662     # remove stale _swap chains
3663     foreach my $chain (keys %$active_chains) {
3664         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3665             $cmdlist .= "destroy $chain\n";
3666         }
3667     }
3668
3669     foreach my $chain (keys %$ruleset) {
3670         my $stat = $statushash->{$chain};
3671         die "internal error" if !$stat;
3672
3673         if ($stat->{action} eq 'create') {
3674             foreach my $cmd (@{$ruleset->{$chain}}) {
3675                 $cmdlist .= "$cmd\n";
3676             }
3677         }
3678     }
3679
3680     foreach my $chain (keys %$ruleset) {
3681         my $stat = $statushash->{$chain};
3682         die "internal error" if !$stat;
3683
3684         if ($stat->{action} eq 'update') {
3685             my $chain_swap = $chain."_swap";
3686
3687             foreach my $cmd (@{$ruleset->{$chain}}) {
3688                 $cmd =~ s/$chain/$chain_swap/;
3689                 $cmdlist .= "$cmd\n";
3690             }
3691             $cmdlist .= "swap $chain_swap $chain\n";
3692             $cmdlist .= "flush $chain_swap\n";
3693             $cmdlist .= "destroy $chain_swap\n";
3694         }
3695     }
3696
3697      # the remove unused chains
3698     foreach my $chain (keys %$statushash) {
3699         next if $statushash->{$chain}->{action} ne 'delete';
3700
3701         $delete_cmdlist .= "flush $chain\n";
3702         $delete_cmdlist .= "destroy $chain\n";
3703     }
3704
3705     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3706
3707     return ($cmdlist, $delete_cmdlist, $changes);
3708 }
3709
3710 sub apply_ruleset {
3711     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3712
3713     enable_bridge_firewall();
3714
3715     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3716         get_ipset_cmdlist($ipset_ruleset, $verbose);
3717
3718     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3719     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3720
3721     if ($verbose) {
3722         if ($ipset_changes) {
3723             print "ipset changes:\n";
3724             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3725             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3726         }
3727
3728         if ($changes) {
3729             print "iptables changes:\n";
3730             print $cmdlist;
3731         }
3732
3733         if ($changesv6) {
3734             print "ip6tables changes:\n";
3735             print $cmdlistv6;
3736         }
3737     }
3738
3739     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3740     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3741
3742     ipset_restore_cmdlist($ipset_create_cmdlist);
3743
3744     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3745     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3746
3747     iptables_restore_cmdlist($cmdlist);
3748
3749     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3750     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3751
3752     ip6tables_restore_cmdlist($cmdlistv6);
3753
3754     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3755     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3756
3757     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3758
3759     # test: re-read status and check if everything is up to date
3760     my $active_chains = iptables_get_chains();
3761     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3762
3763     my $errors;
3764     foreach my $chain (sort keys %$ruleset) {
3765         my $stat = $statushash->{$chain};
3766         if ($stat->{action} ne 'exists') {
3767             warn "unable to update chain '$chain'\n";
3768             $errors = 1;
3769         }
3770     }
3771
3772     my $active_chainsv6 = iptables_get_chains("ip6tables");
3773     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3774
3775     foreach my $chain (sort keys %$rulesetv6) {
3776         my $stat = $statushashv6->{$chain};
3777         if ($stat->{action} ne 'exists') {
3778             warn "unable to update chain '$chain'\n";
3779             $errors = 1;
3780         }
3781     }
3782
3783     die "unable to apply firewall changes\n" if $errors;
3784
3785     update_nf_conntrack_max($hostfw_conf);
3786
3787     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3788
3789 }
3790
3791 sub update_nf_conntrack_max {
3792     my ($hostfw_conf) = @_;
3793
3794     my $max = 65536; # reasonable default
3795
3796     my $options = $hostfw_conf->{options} || {};
3797
3798     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3799         $max = $options->{nf_conntrack_max};
3800         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3801     }
3802
3803     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3804     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3805
3806     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3807
3808     if ($current != $max) {
3809         my $hashsize = int($max/4);
3810         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3811         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3812     }
3813 }
3814
3815 sub update_nf_conntrack_tcp_timeout_established {
3816     my ($hostfw_conf) = @_;
3817
3818     my $options = $hostfw_conf->{options} || {};
3819
3820     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3821
3822     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3823 }
3824
3825 sub remove_pvefw_chains {
3826
3827     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3828     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3829     PVE::Firewall::remove_pvefw_chains_ipset();
3830
3831 }
3832
3833 sub remove_pvefw_chains_iptables {
3834     my ($iptablescmd) = @_;
3835
3836     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3837     my $cmdlist = "*filter\n";
3838
3839     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3840         if ($hooks->{$h}) {
3841             $cmdlist .= "-D $h -j PVEFW-$h\n";
3842         }
3843     }
3844
3845     foreach my $chain (keys %$chash) {
3846         $cmdlist .= "-F $chain\n";
3847     }
3848
3849     foreach my $chain (keys %$chash) {
3850         $cmdlist .= "-X $chain\n";
3851     }
3852     $cmdlist .= "COMMIT\n";
3853
3854     if($iptablescmd eq "ip6tables") {
3855         ip6tables_restore_cmdlist($cmdlist);
3856     } else {
3857         iptables_restore_cmdlist($cmdlist);
3858     }
3859 }
3860
3861 sub remove_pvefw_chains_ipset {
3862
3863     my $ipset_chains = ipset_get_chains();
3864
3865     my $cmdlist = "";
3866
3867     foreach my $chain (keys %$ipset_chains) {
3868         $cmdlist .= "flush $chain\n";
3869         $cmdlist .= "destroy $chain\n";
3870     }
3871
3872     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3873 }
3874
3875 sub init {
3876     my $cluster_conf = load_clusterfw_conf();
3877     my $cluster_options = $cluster_conf->{options};
3878     my $enable = $cluster_options->{enable};
3879
3880     return if !$enable;
3881
3882     # load required modules here
3883 }
3884
3885 sub update {
3886     my $code = sub {
3887
3888         my $cluster_conf = load_clusterfw_conf();
3889         my $cluster_options = $cluster_conf->{options};
3890
3891         if (!$cluster_options->{enable}) {
3892             PVE::Firewall::remove_pvefw_chains();
3893             return;
3894         }
3895
3896         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3897
3898         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3899
3900         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3901     };
3902
3903     run_locked($code);
3904 }
3905
3906 1;