src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use PVE::Network;
  16 use File::Basename;
  17 use File::Path;
  18 use IO::File;
  19 use Net::IP;
  20 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  21 use Encode;
  22
  23 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  24 my $pvefw_conf_dir = "/etc/pve/firewall";
  25 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  26
  27 # dynamically include PVE::QemuServer and PVE::LXC
  28 # to avoid dependency problems
  29 my $have_qemu_server;
  30 eval {
  31     require PVE::QemuServer;
  32     require PVE::QemuConfig;
  33     $have_qemu_server = 1;
  34 };
  35
  36 my $have_lxc;
  37 eval {
  38     require PVE::LXC;
  39     $have_lxc = 1;
  40 };
  41
  42
  43 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  44
  45 mkdir $pve_fw_status_dir; # make sure this exists
  46
  47 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50
  51 my $max_alias_name_length = 64;
  52 my $max_ipset_name_length = 64;
  53 my $max_group_name_length = 18;
  54
  55 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  56 sub pve_verify_ip_or_cidr {
  57     my ($cidr, $noerr) = @_;
  58
  59     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  60         return $cidr if Net::IP->new($cidr);
  61         return undef if $noerr;
  62         die Net::IP::Error() . "\n";
  63     }
  64     return undef if $noerr;
  65     die "value does not look like a valid IP address or CIDR network\n";
  66 }
  67
  68 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  69 sub pve_verify_ip_or_cidr_or_alias {
  70     my ($cidr, $noerr) = @_;
  71
  72     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  73
  74     return pve_verify_ip_or_cidr($cidr, $noerr);
  75 }
  76
  77 PVE::JSONSchema::register_standard_option('ipset-name', {
  78     description => "IP set name.",
  79     type => 'string',
  80     pattern => $ipset_name_pattern,
  81     minLength => 2,
  82     maxLength => $max_ipset_name_length,
  83 });
  84
  85 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  86     description => "Alias name.",
  87     type => 'string',
  88     pattern => $ip_alias_pattern,
  89     minLength => 2,
  90     maxLength => $max_alias_name_length,
  91 });
  92
  93 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  94     description => "Log level.",
  95     type => 'string',
  96     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  97     optional => 1,
  98 });
  99
 100 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 101     description => "Security Group name.",
 102     type => 'string',
 103     pattern => $security_group_name_pattern,
 104     minLength => 2,
 105     maxLength => $max_group_name_length,
 106 });
 107
 108 my $feature_ipset_nomatch = 0;
 109 eval  {
 110     my (undef, undef, $release) = POSIX::uname();
 111     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 112         my ($major, $minor) = ($1, $2);
 113         $feature_ipset_nomatch = 1 if ($major > 3) ||
 114             ($major == 3 && $minor >= 7);
 115     }
 116
 117 };
 118
 119 my $nodename = PVE::INotify::nodename();
 120
 121 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 122
 123 my $default_log_level = 'nolog'; # avoid logs by default
 124
 125 my $log_level_hash = {
 126     debug => 7,
 127     info => 6,
 128     notice => 5,
 129     warning => 4,
 130     err => 3,
 131     crit => 2,
 132     alert => 1,
 133     emerg => 0,
 134 };
 135
 136 # we need to overwrite some macros for ipv6
 137 my $pve_ipv6fw_macros = {
 138     'Ping' => [
 139         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 140     ],
 141     'NeighborDiscovery' => [
 142         "IPv6 neighbor solicitation, neighbor and router advertisement",
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 146         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 147     ],
 148     'DHCPv6' => [
 149         "DHCPv6 traffic",
 150         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 151     ],
 152     'Trcrt' => [
 153         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 154         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 155     ],
 156  };
 157
 158 # imported/converted from: /usr/share/shorewall/macro.*
 159 my $pve_fw_macros = {
 160     'Amanda' => [
 161         "Amanda Backup",
 162         { action => 'PARAM', proto => 'udp', dport => '10080' },
 163         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 164     ],
 165     'Auth' => [
 166         "Auth (identd) traffic",
 167         { action => 'PARAM', proto => 'tcp', dport => '113' },
 168     ],
 169     'BGP' => [
 170         "Border Gateway Protocol traffic",
 171         { action => 'PARAM', proto => 'tcp', dport => '179' },
 172     ],
 173     'BitTorrent' => [
 174         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 175         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 176         { action => 'PARAM', proto => 'udp', dport => '6881' },
 177     ],
 178     'BitTorrent32' => [
 179         "BitTorrent traffic for BitTorrent 3.2 and later",
 180         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 181         { action => 'PARAM', proto => 'udp', dport => '6881' },
 182     ],
 183     'Ceph' => [
 184         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 185         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 186         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 187     ],
 188     'CVS' => [
 189         "Concurrent Versions System pserver traffic",
 190         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 191     ],
 192     'Citrix' => [
 193         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 194         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 195         { action => 'PARAM', proto => 'udp', dport => '1604' },
 196         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 197     ],
 198     'DAAP' => [
 199         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 200         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 201         { action => 'PARAM', proto => 'udp', dport => '3689' },
 202     ],
 203     'DCC' => [
 204         "Distributed Checksum Clearinghouse spam filtering mechanism",
 205         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 206     ],
 207     'DHCPfwd' => [
 208         "Forwarded DHCP traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 210     ],
 211     'DNS' => [
 212         "Domain Name System traffic (upd and tcp)",
 213         { action => 'PARAM', proto => 'udp', dport => '53' },
 214         { action => 'PARAM', proto => 'tcp', dport => '53' },
 215     ],
 216     'Distcc' => [
 217         "Distributed Compiler service",
 218         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 219     ],
 220     'FTP' => [
 221         "File Transfer Protocol",
 222         { action => 'PARAM', proto => 'tcp', dport => '21' },
 223     ],
 224     'Finger' => [
 225         "Finger protocol (RFC 742)",
 226         { action => 'PARAM', proto => 'tcp', dport => '79' },
 227     ],
 228     'GNUnet' => [
 229         "GNUnet secure peer-to-peer networking traffic",
 230         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 231         { action => 'PARAM', proto => 'udp', dport => '2086' },
 232         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 233         { action => 'PARAM', proto => 'udp', dport => '1080' },
 234     ],
 235     'GRE' => [
 236         "Generic Routing Encapsulation tunneling protocol",
 237         { action => 'PARAM', proto => '47' },
 238     ],
 239     'Git' => [
 240         "Git distributed revision control traffic",
 241         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 242     ],
 243     'HKP' => [
 244         "OpenPGP HTTP keyserver protocol traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 246     ],
 247     'HTTP' => [
 248         "Hypertext Transfer Protocol (WWW)",
 249         { action => 'PARAM', proto => 'tcp', dport => '80' },
 250     ],
 251     'HTTPS' => [
 252         "Hypertext Transfer Protocol (WWW) over SSL",
 253         { action => 'PARAM', proto => 'tcp', dport => '443' },
 254     ],
 255     'ICPV2' => [
 256         "Internet Cache Protocol V2 (Squid) traffic",
 257         { action => 'PARAM', proto => 'udp', dport => '3130' },
 258     ],
 259     'ICQ' => [
 260         "AOL Instant Messenger traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 262     ],
 263     'IMAP' => [
 264         "Internet Message Access Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '143' },
 266     ],
 267     'IMAPS' => [
 268         "Internet Message Access Protocol over SSL",
 269         { action => 'PARAM', proto => 'tcp', dport => '993' },
 270     ],
 271     'IPIP' => [
 272         "IPIP capsulation traffic",
 273         { action => 'PARAM', proto => '94' },
 274     ],
 275     'IPsec' => [
 276         "IPsec traffic",
 277         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 278         { action => 'PARAM', proto => '50' },
 279     ],
 280     'IPsecah' => [
 281         "IPsec authentication (AH) traffic",
 282         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 283         { action => 'PARAM', proto => '51' },
 284     ],
 285     'IPsecnat' => [
 286         "IPsec traffic and Nat-Traversal",
 287         { action => 'PARAM', proto => 'udp', dport => '500' },
 288         { action => 'PARAM', proto => 'udp', dport => '4500' },
 289         { action => 'PARAM', proto => '50' },
 290     ],
 291     'IRC' => [
 292         "Internet Relay Chat traffic",
 293         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 294     ],
 295     'Jetdirect' => [
 296         "HP Jetdirect printing",
 297         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 298     ],
 299     'L2TP' => [
 300         "Layer 2 Tunneling Protocol traffic",
 301         { action => 'PARAM', proto => 'udp', dport => '1701' },
 302     ],
 303     'LDAP' => [
 304         "Lightweight Directory Access Protocol traffic",
 305         { action => 'PARAM', proto => 'tcp', dport => '389' },
 306     ],
 307     'LDAPS' => [
 308         "Secure Lightweight Directory Access Protocol traffic",
 309         { action => 'PARAM', proto => 'tcp', dport => '636' },
 310     ],
 311     'MSNP' => [
 312         "Microsoft Notification Protocol",
 313         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 314     ],
 315     'MSSQL' => [
 316         "Microsoft SQL Server",
 317         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 318     ],
 319     'Mail' => [
 320         "Mail traffic (SMTP, SMTPS, Submission)",
 321         { action => 'PARAM', proto => 'tcp', dport => '25' },
 322         { action => 'PARAM', proto => 'tcp', dport => '465' },
 323         { action => 'PARAM', proto => 'tcp', dport => '587' },
 324     ],
 325     'MDNS' => [
 326         "Multicast DNS",
 327         { action => 'PARAM', proto => 'udp', dport => '5353' },
 328     ],
 329     'Munin' => [
 330         "Munin networked resource monitoring traffic",
 331         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 332     ],
 333     'MySQL' => [
 334         "MySQL server",
 335         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 336     ],
 337     'NNTP' => [
 338         "NNTP traffic (Usenet).",
 339         { action => 'PARAM', proto => 'tcp', dport => '119' },
 340     ],
 341     'NNTPS' => [
 342         "Encrypted NNTP traffic (Usenet)",
 343         { action => 'PARAM', proto => 'tcp', dport => '563' },
 344     ],
 345     'NTP' => [
 346         "Network Time Protocol (ntpd)",
 347         { action => 'PARAM', proto => 'udp', dport => '123' },
 348     ],
 349     'OSPF' => [
 350         "OSPF multicast traffic",
 351         { action => 'PARAM', proto => '89' },
 352     ],
 353     'OpenVPN' => [
 354         "OpenVPN traffic",
 355         { action => 'PARAM', proto => 'udp', dport => '1194' },
 356     ],
 357     'PCA' => [
 358         "Symantec PCAnywere (tm)",
 359         { action => 'PARAM', proto => 'udp', dport => '5632' },
 360         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 361     ],
 362     'POP3' => [
 363         "POP3 traffic",
 364         { action => 'PARAM', proto => 'tcp', dport => '110' },
 365     ],
 366     'POP3S' => [
 367         "Encrypted POP3 traffic",
 368         { action => 'PARAM', proto => 'tcp', dport => '995' },
 369     ],
 370     'PPtP' => [
 371         "Point-to-Point Tunneling Protocol",
 372         { action => 'PARAM', proto => '47' },
 373         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 374     ],
 375     'Ping' => [
 376         "ICMP echo request",
 377         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 378     ],
 379     'PostgreSQL' => [
 380         "PostgreSQL server",
 381         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 382     ],
 383     'Printer' => [
 384         "Line Printer protocol printing",
 385         { action => 'PARAM', proto => 'tcp', dport => '515' },
 386     ],
 387     'RDP' => [
 388         "Microsoft Remote Desktop Protocol traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 390     ],
 391     'RIP' => [
 392         "Routing Information Protocol (bidirectional)",
 393         { action => 'PARAM', proto => 'udp', dport => '520' },
 394     ],
 395     'RNDC' => [
 396         "BIND remote management protocol",
 397         { action => 'PARAM', proto => 'tcp', dport => '953' },
 398     ],
 399     'Razor' => [
 400         "Razor Antispam System",
 401         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 402     ],
 403     'Rdate' => [
 404         "Remote time retrieval (rdate)",
 405         { action => 'PARAM', proto => 'tcp', dport => '37' },
 406     ],
 407     'Rsync' => [
 408         "Rsync server",
 409         { action => 'PARAM', proto => 'tcp', dport => '873' },
 410     ],
 411     'SANE' => [
 412         "SANE network scanning",
 413         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 414     ],
 415     'SMB' => [
 416         "Microsoft SMB traffic",
 417         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 418         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 419         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 420         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 421     ],
 422     'SMBswat' => [
 423         "Samba Web Administration Tool",
 424         { action => 'PARAM', proto => 'tcp', dport => '901' },
 425     ],
 426     'SMTP' => [
 427         "Simple Mail Transfer Protocol",
 428         { action => 'PARAM', proto => 'tcp', dport => '25' },
 429     ],
 430     'SMTPS' => [
 431         "Encrypted Simple Mail Transfer Protocol",
 432         { action => 'PARAM', proto => 'tcp', dport => '465' },
 433     ],
 434     'SNMP' => [
 435         "Simple Network Management Protocol",
 436         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 437         { action => 'PARAM', proto => 'tcp', dport => '161' },
 438     ],
 439     'SPAMD' => [
 440         "Spam Assassin SPAMD traffic",
 441         { action => 'PARAM', proto => 'tcp', dport => '783' },
 442     ],
 443     'SSH' => [
 444         "Secure shell traffic",
 445         { action => 'PARAM', proto => 'tcp', dport => '22' },
 446     ],
 447     'SVN' => [
 448         "Subversion server (svnserve)",
 449         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 450     ],
 451     'SixXS' => [
 452         "SixXS IPv6 Deployment and Tunnel Broker",
 453         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 454         { action => 'PARAM', proto => 'udp', dport => '3740' },
 455         { action => 'PARAM', proto => '41' },
 456         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 457     ],
 458     'Squid' => [
 459         "Squid web proxy traffic",
 460         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 461     ],
 462     'Submission' => [
 463         "Mail message submission traffic",
 464         { action => 'PARAM', proto => 'tcp', dport => '587' },
 465     ],
 466     'Syslog' => [
 467         "Syslog protocol (RFC 5424) traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '514' },
 469         { action => 'PARAM', proto => 'tcp', dport => '514' },
 470     ],
 471     'TFTP' => [
 472         "Trivial File Transfer Protocol traffic",
 473         { action => 'PARAM', proto => 'udp', dport => '69' },
 474     ],
 475     'Telnet' => [
 476         "Telnet traffic",
 477         { action => 'PARAM', proto => 'tcp', dport => '23' },
 478     ],
 479     'Telnets' => [
 480         "Telnet over SSL",
 481         { action => 'PARAM', proto => 'tcp', dport => '992' },
 482     ],
 483     'Time' => [
 484         "RFC 868 Time protocol",
 485         { action => 'PARAM', proto => 'tcp', dport => '37' },
 486     ],
 487     'Trcrt' => [
 488         "Traceroute (for up to 30 hops) traffic",
 489         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 490         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 491     ],
 492     'VNC' => [
 493         "VNC traffic for VNC display's 0 - 99",
 494         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 495     ],
 496     'VNCL' => [
 497         "VNC traffic from Vncservers to Vncviewers in listen mode",
 498         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 499     ],
 500     'Web' => [
 501         "WWW traffic (HTTP and HTTPS)",
 502         { action => 'PARAM', proto => 'tcp', dport => '80' },
 503         { action => 'PARAM', proto => 'tcp', dport => '443' },
 504     ],
 505     'Webcache' => [
 506         "Web Cache/Proxy traffic (port 8080)",
 507         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 508     ],
 509     'Webmin' => [
 510         "Webmin traffic",
 511         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 512     ],
 513     'Whois' => [
 514         "Whois (nicname, RFC 3912) traffic",
 515         { action => 'PARAM', proto => 'tcp', dport => '43' },
 516     ],
 517 };
 518
 519 my $pve_fw_parsed_macros;
 520 my $pve_fw_macro_descr;
 521 my $pve_fw_macro_ipversion = {};
 522 my $pve_fw_preferred_macro_names = {};
 523
 524 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 525 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 526
 527 my $pve_std_chains = {};
 528 $pve_std_chains->{4} = {
 529     'PVEFW-SET-ACCEPT-MARK' => [
 530         "-j MARK --set-mark $FWACCEPTMARK_ON",
 531     ],
 532     'PVEFW-DropBroadcast' => [
 533         # same as shorewall 'Broadcast'
 534         # simply DROP BROADCAST/MULTICAST/ANYCAST
 535         # we can use this to reduce logging
 536         { action => 'DROP', dsttype => 'BROADCAST' },
 537         { action => 'DROP', dsttype => 'MULTICAST' },
 538         { action => 'DROP', dsttype => 'ANYCAST' },
 539         { action => 'DROP', dest => '224.0.0.0/4' },
 540     ],
 541     'PVEFW-reject' => [
 542         # same as shorewall 'reject'
 543         { action => 'DROP', dsttype => 'BROADCAST' },
 544         { action => 'DROP', source => '224.0.0.0/4' },
 545         { action => 'DROP', proto => 'icmp' },
 546         "-p tcp -j REJECT --reject-with tcp-reset",
 547         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 548         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 549         "-j REJECT --reject-with icmp-host-prohibited",
 550     ],
 551     'PVEFW-Drop' => [
 552         # same as shorewall 'Drop', which is equal to DROP,
 553         # but REJECT/DROP some packages to reduce logging,
 554         # and ACCEPT critical ICMP types
 555         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 556         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 557         { action => 'PVEFW-DropBroadcast' },
 558         # ACCEPT critical ICMP types
 559         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 560         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 561         # Drop packets with INVALID state
 562         "-m conntrack --ctstate INVALID -j DROP",
 563         # Drop Microsoft SMB noise
 564         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 565         { action => 'DROP', proto => 'udp', dport => '137:139'},
 566         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 567         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 568         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 569         # Drop new/NotSyn traffic so that it doesn't get logged
 570         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 571         # Drop DNS replies
 572         { action => 'DROP', proto => 'udp', sport => 53 },
 573     ],
 574     'PVEFW-Reject' => [
 575         # same as shorewall 'Reject', which is equal to Reject,
 576         # but REJECT/DROP some packages to reduce logging,
 577         # and ACCEPT critical ICMP types
 578         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 579         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 580         { action => 'PVEFW-DropBroadcast' },
 581         # ACCEPT critical ICMP types
 582         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 583         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 584         # Drop packets with INVALID state
 585         "-m conntrack --ctstate INVALID -j DROP",
 586         # Drop Microsoft SMB noise
 587         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 588         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 589         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 590         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 591         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 592         # Drop new/NotSyn traffic so that it doesn't get logged
 593         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 594         # Drop DNS replies
 595         { action => 'DROP', proto => 'udp', sport => 53 },
 596     ],
 597     'PVEFW-tcpflags' => [
 598         # same as shorewall tcpflags action.
 599         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 600         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 601         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 602         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 603         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 604         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 605     ],
 606     'PVEFW-smurfs' => [
 607         # same as shorewall smurfs action
 608         # Filter packets for smurfs (packets with a broadcast address as the source).
 609         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 610         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 611         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 612     ],
 613 };
 614
 615 $pve_std_chains->{6} = {
 616     'PVEFW-SET-ACCEPT-MARK' => [
 617         "-j MARK --set-mark $FWACCEPTMARK_ON",
 618     ],
 619     'PVEFW-DropBroadcast' => [
 620         # same as shorewall 'Broadcast'
 621         # simply DROP BROADCAST/MULTICAST/ANYCAST
 622         # we can use this to reduce logging
 623         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 624         # ipv6 addrtype does not work with kernel 2.6.32
 625         #{ action => 'DROP', dsttype => 'MULTICAST' },
 626         #{ action => 'DROP', dsttype => 'ANYCAST' },
 627         { action => 'DROP', dest => 'ff00::/8' },
 628         #{ action => 'DROP', dest => '224.0.0.0/4' },
 629     ],
 630     'PVEFW-reject' => [
 631         # same as shorewall 'reject'
 632         #{ action => 'DROP', dsttype => 'BROADCAST' },
 633         #{ action => 'DROP', source => '224.0.0.0/4' },
 634         { action => 'DROP', proto => 'icmpv6' },
 635         "-p tcp -j REJECT --reject-with tcp-reset",
 636         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 637         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 638         #"-j REJECT --reject-with icmp-host-prohibited",
 639     ],
 640     'PVEFW-Drop' => [
 641         # same as shorewall 'Drop', which is equal to DROP,
 642         # but REJECT/DROP some packages to reduce logging,
 643         # and ACCEPT critical ICMP types
 644         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 645         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 646         { action => 'PVEFW-DropBroadcast' },
 647         # ACCEPT critical ICMP types
 648         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 649         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 650         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 651
 652         # Drop packets with INVALID state
 653         "-m conntrack --ctstate INVALID -j DROP",
 654         # Drop Microsoft SMB noise
 655         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 656         { action => 'DROP', proto => 'udp', dport => '137:139'},
 657         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 658         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 659         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 660         # Drop new/NotSyn traffic so that it doesn't get logged
 661         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 662         # Drop DNS replies
 663         { action => 'DROP', proto => 'udp', sport => 53 },
 664     ],
 665     'PVEFW-Reject' => [
 666         # same as shorewall 'Reject', which is equal to Reject,
 667         # but REJECT/DROP some packages to reduce logging,
 668         # and ACCEPT critical ICMP types
 669         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 670         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 671         { action => 'PVEFW-DropBroadcast' },
 672         # ACCEPT critical ICMP types
 673         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 674         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 675         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 676
 677         # Drop packets with INVALID state
 678         "-m conntrack --ctstate INVALID -j DROP",
 679         # Drop Microsoft SMB noise
 680         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 681         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 682         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 683         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 684         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 685         # Drop new/NotSyn traffic so that it doesn't get logged
 686         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 687         # Drop DNS replies
 688         { action => 'DROP', proto => 'udp', sport => 53 },
 689     ],
 690     'PVEFW-tcpflags' => [
 691         # same as shorewall tcpflags action.
 692         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 693         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 694         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 695         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 696         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 697         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 698     ],
 699 };
 700
 701 # iptables -p icmp -h
 702 my $icmp_type_names = {
 703     any => 1,
 704     'echo-reply' => 1,
 705     'destination-unreachable' => 1,
 706     'network-unreachable' => 1,
 707     'host-unreachable' => 1,
 708     'protocol-unreachable' => 1,
 709     'port-unreachable' => 1,
 710     'fragmentation-needed' => 1,
 711     'source-route-failed' => 1,
 712     'network-unknown' => 1,
 713     'host-unknown' => 1,
 714     'network-prohibited' => 1,
 715     'host-prohibited' => 1,
 716     'TOS-network-unreachable' => 1,
 717     'TOS-host-unreachable' => 1,
 718     'communication-prohibited' => 1,
 719     'host-precedence-violation' => 1,
 720     'precedence-cutoff' => 1,
 721     'source-quench' => 1,
 722     'redirect' => 1,
 723     'network-redirect' => 1,
 724     'host-redirect' => 1,
 725     'TOS-network-redirect' => 1,
 726     'TOS-host-redirect' => 1,
 727     'echo-request' => 1,
 728     'router-advertisement' => 1,
 729     'router-solicitation' => 1,
 730     'time-exceeded' => 1,
 731     'ttl-zero-during-transit' => 1,
 732     'ttl-zero-during-reassembly' => 1,
 733     'parameter-problem' => 1,
 734     'ip-header-bad' => 1,
 735     'required-option-missing' => 1,
 736     'timestamp-request' => 1,
 737     'timestamp-reply' => 1,
 738     'address-mask-request' => 1,
 739     'address-mask-reply' => 1,
 740 };
 741
 742 # ip6tables -p icmpv6 -h
 743
 744 my $icmpv6_type_names = {
 745     'any' => 1,
 746     'destination-unreachable' => 1,
 747     'no-route' => 1,
 748     'communication-prohibited' => 1,
 749     'address-unreachable' => 1,
 750     'port-unreachable' => 1,
 751     'packet-too-big' => 1,
 752     'time-exceeded' => 1,
 753     'ttl-zero-during-transit' => 1,
 754     'ttl-zero-during-reassembly' => 1,
 755     'parameter-problem' => 1,
 756     'bad-header' => 1,
 757     'unknown-header-type' => 1,
 758     'unknown-option' => 1,
 759     'echo-request' => 1,
 760     'echo-reply' => 1,
 761     'router-solicitation' => 1,
 762     'router-advertisement' => 1,
 763     'neighbor-solicitation' => 1,
 764     'neighbour-solicitation' => 1,
 765     'neighbor-advertisement' => 1,
 766     'neighbour-advertisement' => 1,
 767     'redirect' => 1,
 768 };
 769
 770 sub init_firewall_macros {
 771
 772     $pve_fw_parsed_macros = {};
 773
 774     my $parse = sub {
 775         my ($k, $macro) = @_;
 776         my $lc_name = lc($k);
 777         $pve_fw_macro_ipversion->{$k} = 0;
 778         while (!ref($macro->[0])) {
 779             my $desc = shift @$macro;
 780             if ($desc eq 'ipv4only') {
 781                 $pve_fw_macro_ipversion->{$k} = 4;
 782             } elsif ($desc eq 'ipv6only') {
 783                 $pve_fw_macro_ipversion->{$k} = 6;
 784             } else {
 785                 $pve_fw_macro_descr->{$k} = $desc;
 786             }
 787         }
 788         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 789         $pve_fw_parsed_macros->{$k} = $macro;
 790     };
 791
 792     foreach my $k (keys %$pve_fw_macros) {
 793         &$parse($k, $pve_fw_macros->{$k});
 794     }
 795
 796     foreach my $k (keys %$pve_ipv6fw_macros) {
 797         next if $pve_fw_parsed_macros->{$k};
 798         &$parse($k, $pve_ipv6fw_macros->{$k});
 799         $pve_fw_macro_ipversion->{$k} = 6;
 800     }
 801 }
 802
 803 init_firewall_macros();
 804
 805 sub get_macros {
 806     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 807 }
 808
 809 my $etc_services;
 810
 811 sub get_etc_services {
 812
 813     return $etc_services if $etc_services;
 814
 815     my $filename = "/etc/services";
 816
 817     my $fh = IO::File->new($filename, O_RDONLY);
 818     if (!$fh) {
 819         warn "unable to read '$filename' - $!\n";
 820         return {};
 821     }
 822
 823     my $services = {};
 824
 825     while (my $line = <$fh>) {
 826         chomp ($line);
 827         next if $line =~m/^#/;
 828         next if ($line =~m/^\s*$/);
 829
 830         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 831             $services->{byid}->{$2}->{name} = $1;
 832             $services->{byid}->{$2}->{port} = $2;
 833             $services->{byid}->{$2}->{$3} = 1;
 834             $services->{byname}->{$1} = $services->{byid}->{$2};
 835         }
 836     }
 837
 838     close($fh);
 839
 840     $etc_services = $services;
 841
 842
 843     return $etc_services;
 844 }
 845
 846 my $etc_protocols;
 847
 848 sub get_etc_protocols {
 849     return $etc_protocols if $etc_protocols;
 850
 851     my $filename = "/etc/protocols";
 852
 853     my $fh = IO::File->new($filename, O_RDONLY);
 854     if (!$fh) {
 855         warn "unable to read '$filename' - $!\n";
 856         return {};
 857     }
 858
 859     my $protocols = {};
 860
 861     while (my $line = <$fh>) {
 862         chomp ($line);
 863         next if $line =~m/^#/;
 864         next if ($line =~m/^\s*$/);
 865
 866         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 867             $protocols->{byid}->{$2}->{name} = $1;
 868             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 869         }
 870     }
 871
 872     close($fh);
 873
 874     # add special case for ICMP v6
 875     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 876     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 877
 878     $etc_protocols = $protocols;
 879
 880     return $etc_protocols;
 881 }
 882
 883 my $__local_network;
 884
 885 sub local_network {
 886     my ($new_value) = @_;
 887
 888     $__local_network = $new_value if defined($new_value);
 889
 890     return $__local_network if defined($__local_network);
 891
 892     eval {
 893         my $nodename = PVE::INotify::nodename();
 894
 895         my $ip = PVE::Cluster::remote_node_ip($nodename);
 896
 897         my $testip = Net::IP->new($ip);
 898
 899         my $isv6 = $testip->version == 6;
 900         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 901                            : PVE::ProcFSTools::read_proc_net_route();
 902         foreach my $entry (@$routes) {
 903             my $mask;
 904             if ($isv6) {
 905                 $mask = $entry->{prefix};
 906             } else {
 907                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 908                 next if !defined($mask);
 909             }
 910             my $cidr = "$entry->{dest}/$mask";
 911             my $testnet = Net::IP->new($cidr);
 912             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 913                 $__local_network = $cidr;
 914                 return;
 915             }
 916         }
 917     };
 918     warn $@ if $@;
 919
 920     return $__local_network;
 921 }
 922
 923 # ipset names are limited to 31 characters,
 924 # and we use '-v4' or '-v6' to indicate IP versions,
 925 # and we use '_swap' suffix for atomic update,
 926 # for example PVEFW-${VMID}-${ipset_name}_swap
 927
 928 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 929
 930 sub compute_ipset_chain_name {
 931     my ($vmid, $ipset_name, $ipversion) = @_;
 932
 933     $vmid = 0 if !defined($vmid);
 934
 935     my $id = "$vmid-${ipset_name}-v$ipversion";
 936
 937     if (length($id) > $max_iptables_ipset_name_length) {
 938         $id = PVE::Tools::fnv31a_hex($id);
 939     }
 940
 941     return "PVEFW-$id";
 942 }
 943
 944 sub compute_ipfilter_ipset_name {
 945     my ($iface) = @_;
 946
 947     return "ipfilter-$iface";
 948 }
 949
 950 sub parse_address_list {
 951     my ($str) = @_;
 952
 953     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 954         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 955         return;
 956     }
 957
 958     if ($str =~ m/^${ip_alias_pattern}$/) {
 959         die "alias name too long\n" if length($str) > $max_alias_name_length;
 960         return;
 961     }
 962
 963     my $count = 0;
 964     my $iprange = 0;
 965     my $ipversion;
 966
 967     foreach my $elem (split(/,/, $str)) {
 968         $count++;
 969         my $ip = Net::IP->new($elem);
 970         if (!$ip) {
 971             my $err = Net::IP::Error();
 972             die "invalid IP address: $err\n";
 973         }
 974         $iprange = 1 if $elem =~ m/-/;
 975
 976         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 977
 978         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 979             if $ipversion && ($new_ipversion != $ipversion);
 980
 981         $ipversion = $new_ipversion;
 982     }
 983
 984     die "you can't use a range in a list\n" if $iprange && $count > 1;
 985
 986     return $ipversion;
 987 }
 988
 989 sub parse_port_name_number_or_range {
 990     my ($str, $dport) = @_;
 991
 992     my $services = PVE::Firewall::get_etc_services();
 993     my $count = 0;
 994     my $icmp_port = 0;
 995
 996     foreach my $item (split(/,/, $str)) {
 997         $count++;
 998         if ($item =~ m/^(\d+):(\d+)$/) {
 999             my ($port1, $port2) = ($1, $2);
1000             die "invalid port '$port1'\n" if $port1 > 65535;
1001             die "invalid port '$port2'\n" if $port2 > 65535;
1002         } elsif ($item =~ m/^(\d+)$/) {
1003             my $port = $1;
1004             die "invalid port '$port'\n" if $port > 65535;
1005         } else {
1006             if ($dport && $icmp_type_names->{$item}) {
1007                 $icmp_port = 1;
1008             } elsif ($dport && $icmpv6_type_names->{$item}) {
1009                 $icmp_port = 1;
1010             } else {
1011                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1012             }
1013         }
1014     }
1015
1016     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1017
1018     return $count;
1019 }
1020
1021 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1022 sub pve_fw_verify_sport_spec {
1023    my ($portstr) = @_;
1024
1025    parse_port_name_number_or_range($portstr, 0);
1026
1027    return $portstr;
1028 }
1029
1030 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1031 sub pve_fw_verify_dport_spec {
1032    my ($portstr) = @_;
1033
1034    parse_port_name_number_or_range($portstr, 1);
1035
1036    return $portstr;
1037 }
1038
1039 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1040 sub pve_fw_verify_addr_spec {
1041    my ($list) = @_;
1042
1043    parse_address_list($list);
1044
1045    return $list;
1046 }
1047
1048 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1049 sub pve_fw_verify_protocol_spec {
1050    my ($proto) = @_;
1051
1052    my $protocols = get_etc_protocols();
1053
1054    die "unknown protocol '$proto'\n" if $proto &&
1055        !(defined($protocols->{byname}->{$proto}) ||
1056          defined($protocols->{byid}->{$proto}));
1057
1058    return $proto;
1059 }
1060
1061
1062 # helper function for API
1063
1064 sub copy_opject_with_digest {
1065     my ($object) = @_;
1066
1067     my $sha = Digest::SHA->new('sha1');
1068
1069     my $res = {};
1070     foreach my $k (sort keys %$object) {
1071         my $v = $object->{$k};
1072         next if !defined($v);
1073         $res->{$k} = $v;
1074         $sha->add($k, ':', $v, "\n");
1075     }
1076
1077     my $digest = $sha->hexdigest;
1078
1079     $res->{digest} = $digest;
1080
1081     return wantarray ? ($res, $digest) : $res;
1082 }
1083
1084 sub copy_list_with_digest {
1085     my ($list) = @_;
1086
1087     my $sha = Digest::SHA->new('sha1');
1088
1089     my $res = [];
1090     foreach my $entry (@$list) {
1091         my $data = {};
1092         foreach my $k (sort keys %$entry) {
1093             my $v = $entry->{$k};
1094             next if !defined($v);
1095             $data->{$k} = $v;
1096             # Note: digest ignores refs ($rule->{errors})
1097             # since Digest::SHA expects a series of bytes,
1098             #  we have to encode the value here to prevent errors when
1099             #  using utf8 characters (eg. in comments)
1100             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1101         }
1102         push @$res, $data;
1103     }
1104
1105     my $digest = $sha->hexdigest;
1106
1107     foreach my $entry (@$res) {
1108         $entry->{digest} = $digest;
1109     }
1110
1111     return wantarray ? ($res, $digest) : $res;
1112 }
1113
1114 our $cluster_option_properties = {
1115     enable => {
1116         description => "Enable or disable the firewall cluster wide.",
1117         type => 'integer',
1118         minimum => 0,
1119         optional => 1,
1120     },
1121     policy_in => {
1122         description => "Input policy.",
1123         type => 'string',
1124         optional => 1,
1125         enum => ['ACCEPT', 'REJECT', 'DROP'],
1126     },
1127     policy_out => {
1128         description => "Output policy.",
1129         type => 'string',
1130         optional => 1,
1131         enum => ['ACCEPT', 'REJECT', 'DROP'],
1132     },
1133 };
1134
1135 our $host_option_properties = {
1136     enable => {
1137         description => "Enable host firewall rules.",
1138         type => 'boolean',
1139         optional => 1,
1140     },
1141     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1142         description => "Log level for incoming traffic." }),
1143     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1144         description => "Log level for outgoing traffic." }),
1145     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1146         description => "Log level for illegal tcp flags filter." }),
1147     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1148         description => "Log level for SMURFS filter." }),
1149     nosmurfs => {
1150         description => "Enable SMURFS filter.",
1151         type => 'boolean',
1152         optional => 1,
1153     },
1154     tcpflags => {
1155         description => "Filter illegal combinations of TCP flags.",
1156         type => 'boolean',
1157         optional => 1,
1158     },
1159     nf_conntrack_max => {
1160         description => "Maximum number of tracked connections.",
1161         type => 'integer',
1162         optional => 1,
1163         minimum => 32768,
1164     },
1165     nf_conntrack_tcp_timeout_established => {
1166         description => "Conntrack established timeout.",
1167         type => 'integer',
1168         optional => 1,
1169         minimum => 7875,
1170     },
1171     ndp => {
1172         description => "Enable NDP.",
1173         type => 'boolean',
1174         optional => 1,
1175     },
1176 };
1177
1178 our $vm_option_properties = {
1179     enable => {
1180         description => "Enable/disable firewall rules.",
1181         type => 'boolean',
1182         optional => 1,
1183     },
1184     macfilter => {
1185         description => "Enable/disable MAC address filter.",
1186         type => 'boolean',
1187         optional => 1,
1188     },
1189     dhcp => {
1190         description => "Enable DHCP.",
1191         type => 'boolean',
1192         optional => 1,
1193     },
1194     ndp => {
1195         description => "Enable NDP.",
1196         type => 'boolean',
1197         optional => 1,
1198     },
1199     radv => {
1200         description => "Allow sending Router Advertisement.",
1201         type => 'boolean',
1202         optional => 1,
1203     },
1204     ipfilter => {
1205         description => "Enable default IP filters. " .
1206            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1207            "for every interface. Such ipsets implicitly contain sane default " .
1208            "restrictions such as restricting IPv6 link local addresses to " .
1209            "the one derived from the interface's MAC address. For containers " .
1210            "the configured IP addresses will be implicitly added.",
1211         type => 'boolean',
1212         optional => 1,
1213     },
1214     policy_in => {
1215         description => "Input policy.",
1216         type => 'string',
1217         optional => 1,
1218         enum => ['ACCEPT', 'REJECT', 'DROP'],
1219     },
1220     policy_out => {
1221         description => "Output policy.",
1222         type => 'string',
1223         optional => 1,
1224         enum => ['ACCEPT', 'REJECT', 'DROP'],
1225     },
1226     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1227         description => "Log level for incoming traffic." }),
1228     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1229         description => "Log level for outgoing traffic." }),
1230
1231 };
1232
1233
1234 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.";
1235
1236 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.";
1237
1238 my $rule_properties = {
1239     pos => {
1240         description => "Update rule at position <pos>.",
1241         type => 'integer',
1242         minimum => 0,
1243         optional => 1,
1244     },
1245     digest => get_standard_option('pve-config-digest'),
1246     type => {
1247         description => "Rule type.",
1248         type => 'string',
1249         optional => 1,
1250         enum => ['in', 'out', 'group'],
1251     },
1252     action => {
1253         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1254         type => 'string',
1255         optional => 1,
1256         pattern => $security_group_name_pattern,
1257         maxLength => 20,
1258         minLength => 2,
1259     },
1260     macro => {
1261         description => "Use predefined standard macro.",
1262         type => 'string',
1263         optional => 1,
1264         maxLength => 128,
1265     },
1266     iface => get_standard_option('pve-iface', {
1267         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.",
1268         optional => 1
1269     }),
1270     source => {
1271         description => "Restrict packet source address. $addr_list_descr",
1272         type => 'string', format => 'pve-fw-addr-spec',
1273         optional => 1,
1274     },
1275     dest => {
1276         description => "Restrict packet destination address. $addr_list_descr",
1277         type => 'string', format => 'pve-fw-addr-spec',
1278         optional => 1,
1279     },
1280     proto => {
1281         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1282         type => 'string', format => 'pve-fw-protocol-spec',
1283         optional => 1,
1284     },
1285     enable => {
1286         description => "Flag to enable/disable a rule.",
1287         type => 'integer',
1288         minimum => 0,
1289         optional => 1,
1290     },
1291     sport => {
1292         description => "Restrict TCP/UDP source port. $port_descr",
1293         type => 'string', format => 'pve-fw-sport-spec',
1294         optional => 1,
1295     },
1296     dport => {
1297         description => "Restrict TCP/UDP destination port. $port_descr",
1298         type => 'string', format => 'pve-fw-dport-spec',
1299         optional => 1,
1300     },
1301     comment => {
1302         description => "Descriptive comment.",
1303         type => 'string',
1304         optional => 1,
1305     },
1306 };
1307
1308 sub add_rule_properties {
1309     my ($properties) = @_;
1310
1311     foreach my $k (keys %$rule_properties) {
1312         my $h = $rule_properties->{$k};
1313         # copy data, so that we can modify later without side effects
1314         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1315     }
1316
1317     return $properties;
1318 }
1319
1320 sub delete_rule_properties {
1321     my ($rule, $delete_str) = @_;
1322
1323     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1324         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1325             if !defined($rule_properties->{$opt});
1326         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1327             if $opt eq 'type' || $opt eq 'action';
1328         delete $rule->{$opt};
1329     }
1330
1331     return $rule;
1332 }
1333
1334 my $apply_macro = sub {
1335     my ($macro_name, $param, $verify, $ipversion) = @_;
1336
1337     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1338     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1339
1340     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1341         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1342     }
1343
1344     # skip macros which are specific to another ipversion
1345     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1346         return if $ipversion != $required;
1347     }
1348
1349     my $rules = [];
1350
1351     foreach my $templ (@$macro_rules) {
1352         my $rule = {};
1353         my $param_used = {};
1354         foreach my $k (keys %$templ) {
1355             my $v = $templ->{$k};
1356             if ($v eq 'PARAM') {
1357                 $v = $param->{$k};
1358                 $param_used->{$k} = 1;
1359             } elsif ($v eq 'DEST') {
1360                 $v = $param->{dest};
1361                 $param_used->{dest} = 1;
1362             } elsif ($v eq 'SOURCE') {
1363                 $v = $param->{source};
1364                 $param_used->{source} = 1;
1365             }
1366
1367             if (!defined($v)) {
1368                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1369                 raise_param_exc({ macro => $msg }) if $verify;
1370                 die "$msg\n";
1371             }
1372             $rule->{$k} = $v;
1373         }
1374         foreach my $k (keys %$param) {
1375             next if $k eq 'macro';
1376             next if !defined($param->{$k});
1377             next if $param_used->{$k};
1378             if (defined($rule->{$k})) {
1379                 if ($rule->{$k} ne $param->{$k}) {
1380                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1381                     raise_param_exc({ $k => $msg }) if $verify;
1382                     die "$msg\n";
1383                 }
1384             } else {
1385                 $rule->{$k} = $param->{$k};
1386             }
1387         }
1388         push @$rules, $rule;
1389     }
1390
1391     return $rules;
1392 };
1393
1394 my $rule_env_iface_lookup = {
1395     'ct' => 1,
1396     'vm' => 1,
1397     'group' => 0,
1398     'cluster' => 1,
1399     'host' => 1,
1400 };
1401
1402 sub verify_rule {
1403     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1404
1405     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1406
1407     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1408     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1409
1410     my $errors = $rule->{errors} || {};
1411
1412     my $error_count = 0;
1413
1414     my $add_error = sub {
1415         my ($param, $msg)  = @_;
1416         chomp $msg;
1417         raise_param_exc({ $param => $msg }) if !$noerr;
1418         $error_count++;
1419         $errors->{$param} = $msg if !$errors->{$param};
1420     };
1421
1422     my $ipversion;
1423     my $set_ip_version = sub {
1424         my $vers = shift;
1425         if ($vers) {
1426             die "detected mixed ipv4/ipv6 adresses in rule\n"
1427                 if $ipversion && ($vers != $ipversion);
1428             $ipversion = $vers;
1429         }
1430     };
1431
1432     my $check_ipset_or_alias_property = sub {
1433         my ($name, $expected_ipversion) = @_;
1434
1435         if (my $value = $rule->{$name}) {
1436             if ($value =~ m/^\+/) {
1437                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1438                     &$add_error($name, "no such ipset '$1'")
1439                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1440
1441                 } else {
1442                     &$add_error($name, "invalid ipset name '$value'");
1443                 }
1444             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1445                 my $alias = lc($value);
1446                 &$add_error($name, "no such alias '$value'")
1447                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1448                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1449                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1450
1451                 &$set_ip_version($e->{ipversion});
1452             }
1453         }
1454     };
1455
1456     my $type = $rule->{type};
1457     my $action = $rule->{action};
1458
1459     &$add_error('type', "missing property") if !$type;
1460     &$add_error('action', "missing property") if !$action;
1461
1462     if ($type) {
1463         if ($type eq  'in' || $type eq 'out') {
1464             &$add_error('action', "unknown action '$action'")
1465                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1466         } elsif ($type eq 'group') {
1467             &$add_error('type', "security groups not allowed")
1468                 if !$allow_groups;
1469             &$add_error('action', "invalid characters in security group name")
1470                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1471         } else {
1472             &$add_error('type', "unknown rule type '$type'");
1473         }
1474     }
1475
1476     if ($rule->{iface}) {
1477         &$add_error('type', "parameter -i not allowed for this rule type")
1478             if !$allow_iface;
1479         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1480         &$add_error('iface', $@) if $@;
1481         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1482             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1483                 if $rule->{iface} !~  m/^net(\d+)$/;
1484         }
1485     }
1486
1487     if ($rule->{macro}) {
1488         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1489             $rule->{macro} = $preferred_name;
1490         } else {
1491             &$add_error('macro', "unknown macro '$rule->{macro}'");
1492         }
1493     }
1494
1495     if ($rule->{proto}) {
1496         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1497         &$add_error('proto', $@) if $@;
1498         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1499         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1500     }
1501
1502     if ($rule->{dport}) {
1503         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1504         &$add_error('dport', $@) if $@;
1505         &$add_error('proto', "missing property - 'dport' requires this property")
1506             if !$rule->{proto};
1507     }
1508
1509     if ($rule->{sport}) {
1510         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1511         &$add_error('sport', $@) if $@;
1512         &$add_error('proto', "missing property - 'sport' requires this property")
1513             if !$rule->{proto};
1514     }
1515
1516     if ($rule->{source}) {
1517         eval {
1518             my $source_ipversion = parse_address_list($rule->{source});
1519             &$set_ip_version($source_ipversion);
1520         };
1521         &$add_error('source', $@) if $@;
1522         &$check_ipset_or_alias_property('source', $ipversion);
1523     }
1524
1525     if ($rule->{dest}) {
1526         eval {
1527             my $dest_ipversion = parse_address_list($rule->{dest});
1528             &$set_ip_version($dest_ipversion);
1529         };
1530         &$add_error('dest', $@) if $@;
1531         &$check_ipset_or_alias_property('dest', $ipversion);
1532     }
1533
1534     $rule->{ipversion} = $ipversion if $ipversion;
1535
1536     if ($rule->{macro} && !$error_count) {
1537         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1538         if (my $err = $@) {
1539             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1540                 my $eh = $err->{errors};
1541                 foreach my $p (keys %$eh) {
1542                     &$add_error($p, $eh->{$p});
1543                 }
1544             } else {
1545                 &$add_error('macro', "$err");
1546             }
1547         }
1548     }
1549
1550     $rule->{errors} = $errors if $error_count;
1551
1552     return $rule;
1553 }
1554
1555 sub copy_rule_data {
1556     my ($rule, $param) = @_;
1557
1558     foreach my $k (keys %$rule_properties) {
1559         if (defined(my $v = $param->{$k})) {
1560             if ($v eq '' || $v eq '-') {
1561                 delete $rule->{$k};
1562             } else {
1563                 $rule->{$k} = $v;
1564             }
1565         }
1566     }
1567
1568     return $rule;
1569 }
1570
1571 sub rules_modify_permissions {
1572     my ($rule_env) = @_;
1573
1574     if ($rule_env eq 'host') {
1575         return {
1576             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1577         };
1578     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1579         return {
1580             check => ['perm', '/', [ 'Sys.Modify' ]],
1581         };
1582     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1583         return {
1584             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1585         }
1586     }
1587
1588     return undef;
1589 }
1590
1591 sub rules_audit_permissions {
1592     my ($rule_env) = @_;
1593
1594     if ($rule_env eq 'host') {
1595         return {
1596             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1597         };
1598     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1599         return {
1600             check => ['perm', '/', [ 'Sys.Audit' ]],
1601         };
1602     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1603         return {
1604             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1605         }
1606     }
1607
1608     return undef;
1609 }
1610
1611 # core functions
1612 my $bridge_firewall_enabled = 0;
1613
1614 sub enable_bridge_firewall {
1615
1616     return if $bridge_firewall_enabled; # only once
1617
1618     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1619     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1620
1621     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1622     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1623
1624     $bridge_firewall_enabled = 1;
1625 }
1626
1627 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1628
1629 sub iptables_restore_cmdlist {
1630     my ($cmdlist) = @_;
1631
1632     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1633 }
1634
1635 sub ip6tables_restore_cmdlist {
1636     my ($cmdlist) = @_;
1637
1638     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1639 }
1640
1641 sub ipset_restore_cmdlist {
1642     my ($cmdlist) = @_;
1643
1644     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1645 }
1646
1647 sub iptables_get_chains {
1648     my ($iptablescmd) = @_;
1649
1650     $iptablescmd = "iptables" if !$iptablescmd;
1651
1652     my $res = {};
1653
1654     # check what chains we want to track
1655     my $is_pvefw_chain = sub {
1656         my $name = shift;
1657
1658         return 1 if $name =~ m/^PVEFW-\S+$/;
1659
1660         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1661
1662         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1663
1664         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1665         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1666
1667         return undef;
1668     };
1669
1670     my $table = '';
1671
1672     my $hooks = {};
1673
1674     my $parser = sub {
1675         my $line = shift;
1676
1677         return if $line =~ m/^#/;
1678         return if $line =~ m/^\s*$/;
1679
1680         if ($line =~ m/^\*(\S+)$/) {
1681             $table = $1;
1682             return;
1683         }
1684
1685         return if $table ne 'filter';
1686
1687         if ($line =~ m/^:(\S+)\s/) {
1688             my $chain = $1;
1689             return if !&$is_pvefw_chain($chain);
1690             $res->{$chain} = "unknown";
1691         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1692             my ($chain, $sig) = ($1, $2);
1693             return if !&$is_pvefw_chain($chain);
1694             $res->{$chain} = $sig;
1695         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1696             $hooks->{$1} = 1;
1697         } else {
1698             # simply ignore the rest
1699             return;
1700         }
1701     };
1702
1703     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1704
1705     return wantarray ? ($res, $hooks) : $res;
1706 }
1707
1708 sub iptables_chain_digest {
1709     my ($rules) = @_;
1710     my $digest = Digest::SHA->new('sha1');
1711     foreach my $rule (@$rules) { # order is important
1712         $digest->add($rule);
1713     }
1714     return $digest->b64digest;
1715 }
1716
1717 sub ipset_chain_digest {
1718     my ($rules) = @_;
1719
1720     my $digest = Digest::SHA->new('sha1');
1721     foreach my $rule (sort @$rules) { # note: sorted
1722         $digest->add($rule);
1723     }
1724     return $digest->b64digest;
1725 }
1726
1727 sub ipset_get_chains {
1728
1729     my $res = {};
1730     my $chains = {};
1731
1732     my $parser = sub {
1733         my $line = shift;
1734
1735         return if $line =~ m/^#/;
1736         return if $line =~ m/^\s*$/;
1737         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1738             my $chain = $1;
1739             $line =~ s/\s+$//; # delete trailing white space
1740             push @{$chains->{$chain}}, $line;
1741         } else {
1742             # simply ignore the rest
1743             return;
1744         }
1745     };
1746
1747     run_command("/sbin/ipset save", outfunc => $parser);
1748
1749     # compute digest for each chain
1750     foreach my $chain (keys %$chains) {
1751         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1752     }
1753
1754     return $res;
1755 }
1756
1757 sub ruleset_generate_cmdstr {
1758     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1759
1760     return if defined($rule->{enable}) && !$rule->{enable};
1761     return if $rule->{errors};
1762
1763     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1764
1765     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1766     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1767
1768     my @cmd = ();
1769
1770     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1771     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1772
1773     my $source = $rule->{source};
1774     my $dest = $rule->{dest};
1775
1776     if ($source) {
1777         if ($source =~ m/^\+/) {
1778             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1779                 my $name = $1;
1780                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1781                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1782                     push @cmd, "-m set --match-set ${ipset_chain} src";
1783                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1784                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1785                     push @cmd, "-m set --match-set ${ipset_chain} src";
1786                 } else {
1787                     die "no such ipset '$name'\n";
1788                 }
1789             } else {
1790                 die "invalid security group name '$source'\n";
1791             }
1792         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1793             my $alias = lc($source);
1794             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1795             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1796             die "no such alias '$source'\n" if !$e;
1797             push @cmd, "-s $e->{cidr}";
1798         } elsif ($source =~ m/\-/){
1799             push @cmd, "-m iprange --src-range $source";
1800         } else {
1801             push @cmd, "-s $source";
1802         }
1803     }
1804
1805     if ($dest) {
1806         if ($dest =~ m/^\+/) {
1807             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1808                 my $name = $1;
1809                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1810                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1811                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1812                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1813                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1814                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1815                 } else {
1816                     die "no such ipset '$name'\n";
1817                 }
1818             } else {
1819                 die "invalid security group name '$dest'\n";
1820             }
1821         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1822             my $alias = lc($dest);
1823             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1824             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1825             die "no such alias '$dest'\n" if !$e;
1826             push @cmd, "-d $e->{cidr}";
1827         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1828             push @cmd, "-m iprange --dst-range $dest";
1829         } else {
1830             push @cmd, "-d $dest";
1831         }
1832     }
1833
1834     if ($rule->{proto}) {
1835         push @cmd, "-p $rule->{proto}";
1836
1837         my $multiport = 0;
1838         $multiport++ if $nbdport > 1;
1839         $multiport++ if $nbsport > 1;
1840
1841         push @cmd, "--match multiport" if $multiport;
1842
1843         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1844             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1845
1846         if ($rule->{dport}) {
1847             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1848                 # Note: we use dport to store --icmp-type
1849                 die "unknown icmp-type '$rule->{dport}'\n"
1850                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1851                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1852             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1853                 # Note: we use dport to store --icmpv6-type
1854                 die "unknown icmpv6-type '$rule->{dport}'\n"
1855                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1856                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1857             } else {
1858                 if ($nbdport > 1) {
1859                     if ($multiport == 2) {
1860                         push @cmd,  "--ports $rule->{dport}";
1861                     } else {
1862                         push @cmd, "--dports $rule->{dport}";
1863                     }
1864                 } else {
1865                     push @cmd, "--dport $rule->{dport}";
1866                 }
1867             }
1868         }
1869
1870         if ($rule->{sport}) {
1871             if ($nbsport > 1) {
1872                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1873             } else {
1874                 push @cmd, "--sport $rule->{sport}";
1875             }
1876         }
1877     } elsif ($rule->{dport} || $rule->{sport}) {
1878         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1879         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1880     }
1881
1882     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1883
1884     if (my $action = $rule->{action}) {
1885         $action = $actions->{$action} if defined($actions->{$action});
1886         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1887         push @cmd, $goto ? "-g $action" : "-j $action";
1888     }
1889
1890     return scalar(@cmd) ? join(' ', @cmd) : undef;
1891 }
1892
1893 sub ruleset_generate_rule {
1894     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1895
1896     my $rules;
1897
1898     if ($rule->{macro}) {
1899         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1900     } else {
1901         $rules = [ $rule ];
1902     }
1903
1904     # update all or nothing
1905
1906     my @cmds = ();
1907     foreach my $tmp (@$rules) {
1908         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1909             push @cmds, $cmdstr;
1910         }
1911     }
1912
1913     foreach my $cmdstr (@cmds) {
1914         ruleset_addrule($ruleset, $chain, $cmdstr);
1915     }
1916 }
1917
1918 sub ruleset_generate_rule_insert {
1919     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1920
1921     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1922
1923     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1924         ruleset_insertrule($ruleset, $chain, $cmdstr);
1925     }
1926 }
1927
1928 sub ruleset_create_chain {
1929     my ($ruleset, $chain) = @_;
1930
1931     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1932     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1933
1934     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1935
1936     $ruleset->{$chain} = [];
1937 }
1938
1939 sub ruleset_chain_exist {
1940     my ($ruleset, $chain) = @_;
1941
1942     return $ruleset->{$chain} ? 1 : undef;
1943 }
1944
1945 sub ruleset_addrule {
1946    my ($ruleset, $chain, $rule) = @_;
1947
1948    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1949
1950    push @{$ruleset->{$chain}}, "-A $chain $rule";
1951 }
1952
1953 sub ruleset_insertrule {
1954    my ($ruleset, $chain, $rule) = @_;
1955
1956    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1957
1958    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1959 }
1960
1961 sub get_log_rule_base {
1962     my ($chain, $vmid, $msg, $loglevel) = @_;
1963
1964     die "internal error - no log level" if !defined($loglevel);
1965
1966     $vmid = 0 if !defined($vmid);
1967
1968     # Note: we use special format for prefix to pass further
1969     # info to log daemon (VMID, LOGVELEL and CHAIN)
1970
1971     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1972 }
1973
1974 sub ruleset_addlog {
1975     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1976
1977     return if !defined($loglevel);
1978
1979     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1980
1981     $logrule = "$rule $logrule" if defined($rule);
1982
1983     ruleset_addrule($ruleset, $chain, $logrule);
1984 }
1985
1986 sub ruleset_add_chain_policy {
1987     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1988
1989     if ($policy eq 'ACCEPT') {
1990
1991         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1992                               { ACCEPT =>  $accept_action});
1993
1994     } elsif ($policy eq 'DROP') {
1995
1996         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1997
1998         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1999
2000         ruleset_addrule($ruleset, $chain, "-j DROP");
2001     } elsif ($policy eq 'REJECT') {
2002         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2003
2004         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2005
2006         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2007     } else {
2008         # should not happen
2009         die "internal error: unknown policy '$policy'";
2010     }
2011 }
2012
2013 sub ruleset_chain_add_ndp {
2014     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2015     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2016
2017     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2018     if ($direction ne 'OUT' || $options->{radv}) {
2019         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2020     }
2021     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2022     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2023 }
2024
2025 sub ruleset_chain_add_conn_filters {
2026     my ($ruleset, $chain, $accept) = @_;
2027
2028     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2029     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2030 }
2031
2032 sub ruleset_chain_add_input_filters {
2033     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2034
2035     if ($cluster_conf->{ipset}->{blacklist}){
2036         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2037             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2038             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2039             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2040         }
2041         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2042         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2043     }
2044
2045     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2046         if ($ipversion == 4) {
2047             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2048         }
2049     }
2050
2051     if ($options->{tcpflags}) {
2052         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2053     }
2054 }
2055
2056 sub ruleset_create_vm_chain {
2057     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2058
2059     ruleset_create_chain($ruleset, $chain);
2060     my $accept = generate_nfqueue($options);
2061
2062     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2063         if ($ipversion == 4) {
2064             if ($direction eq 'OUT') {
2065                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2066                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2067                                         proto => 'udp', sport => 68, dport => 67 });
2068             } else {
2069                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2070                                       { action => 'ACCEPT',
2071                                         proto => 'udp', sport => 67, dport => 68 });
2072             }
2073         } elsif ($ipversion == 6) {
2074             if ($direction eq 'OUT') {
2075                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2076                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2077                                         proto => 'udp', sport => 546, dport => 547 });
2078             } else {
2079                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2080                                       { action => 'ACCEPT',
2081                                         proto => 'udp', sport => 547, dport => 546 });
2082             }
2083         }
2084
2085     }
2086
2087     if ($direction eq 'OUT') {
2088         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2089             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2090         }
2091         if ($ipversion == 6 && !$options->{radv}) {
2092             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2093         }
2094         if ($ipfilter_ipset) {
2095             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2096         }
2097         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2098     }
2099
2100     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2101     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2102 }
2103
2104 sub ruleset_add_group_rule {
2105     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2106
2107     my $group = $rule->{action};
2108     my $group_chain = "GROUP-$group-$direction";
2109     if(!ruleset_chain_exist($ruleset, $group_chain)){
2110         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2111     }
2112
2113     if ($direction eq 'OUT' && $rule->{iface_out}) {
2114         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2115     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2116         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2117     } else {
2118         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2119     }
2120
2121     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2122 }
2123
2124 sub ruleset_generate_vm_rules {
2125     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2126
2127     my $lc_direction = lc($direction);
2128
2129     my $in_accept = generate_nfqueue($options);
2130
2131     foreach my $rule (@$rules) {
2132         next if $rule->{iface} && $rule->{iface} ne $netid;
2133         next if !$rule->{enable} || $rule->{errors};
2134         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2135
2136         if ($rule->{type} eq 'group') {
2137             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2138                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2139         } else {
2140             next if $rule->{type} ne $lc_direction;
2141             eval {
2142                 if ($direction eq 'OUT') {
2143                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2144                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2145                                           undef, $cluster_conf, $vmfw_conf);
2146                 } else {
2147                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2148                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2149                                           undef, $cluster_conf, $vmfw_conf);
2150                 }
2151             };
2152             warn $@ if $@;
2153         }
2154     }
2155 }
2156
2157 sub generate_nfqueue {
2158     my ($options) = @_;
2159
2160     if ($options->{ips}) {
2161         my $action = "NFQUEUE";
2162         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2163             if (defined($3) && defined($1)) {
2164                 $action .= " --queue-balance $1:$3";
2165             } elsif (defined($1)) {
2166                 $action .= " --queue-num $1";
2167             }
2168         }
2169         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2170         return $action;
2171     } else {
2172         return "ACCEPT";
2173     }
2174 }
2175
2176 sub ruleset_generate_vm_ipsrules {
2177     my ($ruleset, $options, $direction, $iface) = @_;
2178
2179     if ($options->{ips} && $direction eq 'IN') {
2180         my $nfqueue = generate_nfqueue($options);
2181
2182         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2183             ruleset_create_chain($ruleset, "PVEFW-IPS");
2184         }
2185
2186         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2187     }
2188 }
2189
2190 sub generate_tap_rules_direction {
2191     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2192
2193     my $lc_direction = lc($direction);
2194
2195     my $rules = $vmfw_conf->{rules};
2196
2197     my $options = $vmfw_conf->{options};
2198     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2199
2200     my $tapchain = "$iface-$direction";
2201
2202     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2203     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2204         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2205
2206     # create chain with mac and ip filter
2207     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2208
2209     if ($options->{enable}) {
2210         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2211
2212         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2213
2214         # implement policy
2215         my $policy;
2216
2217         if ($direction eq 'OUT') {
2218             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2219         } else {
2220         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2221         }
2222
2223         my $accept = generate_nfqueue($options);
2224         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2225         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2226     } else {
2227         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2228         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2229     }
2230
2231     # plug the tap chain to bridge chain
2232     if ($direction eq 'IN') {
2233         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2234                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2235     } else {
2236         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2237                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2238     }
2239 }
2240
2241 sub enable_host_firewall {
2242     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2243
2244     my $options = $hostfw_conf->{options};
2245     my $cluster_options = $cluster_conf->{options};
2246     my $rules = $hostfw_conf->{rules};
2247     my $cluster_rules = $cluster_conf->{rules};
2248
2249     # host inbound firewall
2250     my $chain = "PVEFW-HOST-IN";
2251     ruleset_create_chain($ruleset, $chain);
2252
2253     my $loglevel = get_option_log_level($options, "log_level_in");
2254
2255     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2256
2257     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2258     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2259     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2260
2261     # we use RETURN because we need to check also tap rules
2262     my $accept_action = 'RETURN';
2263
2264     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2265
2266     # add host rules first, so that cluster wide rules can be overwritten
2267     foreach my $rule (@$rules, @$cluster_rules) {
2268         next if !$rule->{enable} || $rule->{errors};
2269         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2270
2271         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2272
2273         eval {
2274             if ($rule->{type} eq 'group') {
2275                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2276             } elsif ($rule->{type} eq 'in') {
2277                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2278                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2279                                       undef, $cluster_conf, $hostfw_conf);
2280             }
2281         };
2282         warn $@ if $@;
2283         delete $rule->{iface_in};
2284     }
2285
2286     # allow standard traffic for management ipset (includes cluster network)
2287     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2288     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2289     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2290     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2291     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2292     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2293
2294     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2295     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2296
2297     # corosync
2298     if ($localnet && ($ipversion == $localnet_ver)) {
2299         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2300         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2301         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2302     }
2303
2304     # implement input policy
2305     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2306     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2307
2308     # host outbound firewall
2309     $chain = "PVEFW-HOST-OUT";
2310     ruleset_create_chain($ruleset, $chain);
2311
2312     $loglevel = get_option_log_level($options, "log_level_out");
2313
2314     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2315
2316     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2317
2318     # we use RETURN because we may want to check other thigs later
2319     $accept_action = 'RETURN';
2320     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2321
2322     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2323
2324     # add host rules first, so that cluster wide rules can be overwritten
2325     foreach my $rule (@$rules, @$cluster_rules) {
2326         next if !$rule->{enable} || $rule->{errors};
2327         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2328
2329         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2330         eval {
2331             if ($rule->{type} eq 'group') {
2332                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2333             } elsif ($rule->{type} eq 'out') {
2334                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2335                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2336                                       undef, $cluster_conf, $hostfw_conf);
2337             }
2338         };
2339         warn $@ if $@;
2340         delete $rule->{iface_out};
2341     }
2342
2343     # allow standard traffic on cluster network
2344     if ($localnet && ($ipversion == $localnet_ver)) {
2345         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2346         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2347         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2348         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2349
2350         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2351         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2352         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2353     }
2354
2355     # implement output policy
2356     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2357     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2358
2359     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2360     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2361 }
2362
2363 sub generate_group_rules {
2364     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2365
2366     my $rules = $cluster_conf->{groups}->{$group};
2367
2368     if (!$rules) {
2369         warn "no such security group '$group'\n";
2370         $rules = []; # create empty chain
2371     }
2372
2373     my $chain = "GROUP-${group}-IN";
2374
2375     ruleset_create_chain($ruleset, $chain);
2376     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2377
2378     foreach my $rule (@$rules) {
2379         next if $rule->{type} ne 'in';
2380         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2381         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2382                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2383                               undef, $cluster_conf);
2384     }
2385
2386     $chain = "GROUP-${group}-OUT";
2387
2388     ruleset_create_chain($ruleset, $chain);
2389     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2390
2391     foreach my $rule (@$rules) {
2392         next if $rule->{type} ne 'out';
2393         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2394         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2395         # check also other tap rules later
2396         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2397                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2398                               undef, $cluster_conf);
2399     }
2400 }
2401
2402 my $MAX_NETS = 32;
2403 my $valid_netdev_names = {};
2404 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2405     $valid_netdev_names->{"net$i"} = 1;
2406 }
2407
2408 sub get_mark_values {
2409     my ($value, $mask) = @_;
2410     $value = hex($value) if $value =~ /^0x/;
2411     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2412     $mask = 0xffffffff if !defined($mask);
2413     return ($value, $mask);
2414 }
2415
2416 sub parse_fw_rule {
2417     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2418
2419     my $orig_line = $line;
2420
2421     my $rule = {};
2422
2423     # we can add single line comments to the end of the rule
2424     if ($line =~ s/#\s*(.*?)\s*$//) {
2425         $rule->{comment} = decode('utf8', $1);
2426     }
2427
2428     # we can disable a rule when prefixed with '|'
2429
2430     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2431
2432     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2433         die "unable to parse rule: $line\n";
2434
2435     $rule->{type} = lc($1);
2436     $rule->{action} = $2;
2437
2438     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2439         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2440             $rule->{macro} = $1;
2441             $rule->{action} = $2;
2442         }
2443     }
2444
2445     while (length($line)) {
2446         if ($line =~ s/^-i (\S+)\s*//) {
2447             $rule->{iface} = $1;
2448             next;
2449         }
2450
2451         last if $rule->{type} eq 'group';
2452
2453         if ($line =~ s/^-p (\S+)\s*//) {
2454             $rule->{proto} = $1;
2455             next;
2456         }
2457
2458         if ($line =~ s/^-dport (\S+)\s*//) {
2459             $rule->{dport} = $1;
2460             next;
2461         }
2462
2463         if ($line =~ s/^-sport (\S+)\s*//) {
2464             $rule->{sport} = $1;
2465             next;
2466         }
2467         if ($line =~ s/^-source (\S+)\s*//) {
2468             $rule->{source} = $1;
2469             next;
2470         }
2471         if ($line =~ s/^-dest (\S+)\s*//) {
2472             $rule->{dest} = $1;
2473             next;
2474         }
2475
2476         last;
2477     }
2478
2479     die "unable to parse rule parameters: $line\n" if length($line);
2480
2481     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2482     if ($verbose && $rule->{errors}) {
2483         warn "$prefix - errors in rule parameters: $orig_line\n";
2484         foreach my $p (keys %{$rule->{errors}}) {
2485             warn "  $p: $rule->{errors}->{$p}\n";
2486         }
2487     }
2488
2489     return $rule;
2490 }
2491
2492 sub parse_vmfw_option {
2493     my ($line) = @_;
2494
2495     my ($opt, $value);
2496
2497     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2498
2499     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2500         $opt = lc($1);
2501         $value = int($2);
2502     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2503         $opt = lc($1);
2504         $value = $2 ? lc($3) : '';
2505     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2506         $opt = lc($1);
2507         $value = uc($3);
2508     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2509         $opt = lc($1);
2510         $value = $2;
2511     } else {
2512         die "can't parse option '$line'\n"
2513     }
2514
2515     return ($opt, $value);
2516 }
2517
2518 sub parse_hostfw_option {
2519     my ($line) = @_;
2520
2521     my ($opt, $value);
2522
2523     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2524
2525     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2526         $opt = lc($1);
2527         $value = int($2);
2528     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2529         $opt = lc($1);
2530         $value = $2 ? lc($3) : '';
2531     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2532         $opt = lc($1);
2533         $value = int($2);
2534     } else {
2535         die "can't parse option '$line'\n"
2536     }
2537
2538     return ($opt, $value);
2539 }
2540
2541 sub parse_clusterfw_option {
2542     my ($line) = @_;
2543
2544     my ($opt, $value);
2545
2546     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2547         $opt = lc($1);
2548         $value = int($2);
2549         if (($value > 1) && ((time() - $value) > 60)) {
2550             $value = 0
2551         }
2552     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2553         $opt = lc($1);
2554         $value = uc($3);
2555     } else {
2556         die "can't parse option '$line'\n"
2557     }
2558
2559     return ($opt, $value);
2560 }
2561
2562 sub resolve_alias {
2563     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2564
2565     my $alias = lc($cidr);
2566     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2567     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2568
2569     die "no such alias '$cidr'\n" if !$e;;
2570
2571     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2572 }
2573
2574 sub parse_ip_or_cidr {
2575     my ($cidr) = @_;
2576
2577     my $ipversion;
2578
2579     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2580         $cidr =~ s|/128$||;
2581         $ipversion = 6;
2582     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2583         $cidr =~ s|/32$||;
2584         $ipversion = 4;
2585     } else {
2586         die "value does not look like a valid IP address or CIDR network\n";
2587     }
2588
2589     return wantarray ? ($cidr, $ipversion) : $cidr;
2590 }
2591
2592 sub parse_alias {
2593     my ($line) = @_;
2594
2595     # we can add single line comments to the end of the line
2596     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2597
2598     if ($line =~ m/^(\S+)\s(\S+)$/) {
2599         my ($name, $cidr) = ($1, $2);
2600         my $ipversion;
2601
2602         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2603
2604         my $data = {
2605             name => $name,
2606             cidr => $cidr,
2607             ipversion => $ipversion,
2608         };
2609         $data->{comment} = $comment  if $comment;
2610         return $data;
2611     }
2612
2613     return undef;
2614 }
2615
2616 sub generic_fw_config_parser {
2617     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2618
2619     my $section;
2620     my $group;
2621
2622     my $res = $empty_conf;
2623
2624     while (defined(my $line = <$fh>)) {
2625         next if $line =~ m/^#/;
2626         next if $line =~ m/^\s*$/;
2627
2628         chomp $line;
2629
2630         my $linenr = $fh->input_line_number();
2631         my $prefix = "$filename (line $linenr)";
2632
2633         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2634             $section = 'options';
2635             next;
2636         }
2637
2638         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2639             $section = 'aliases';
2640             next;
2641         }
2642
2643         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2644             $section = 'groups';
2645             $group = lc($1);
2646             my $comment = $2;
2647             eval {
2648                 die "security group name too long\n" if length($group) > $max_group_name_length;
2649                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2650             };
2651             if (my $err = $@) {
2652                 ($section, $group, $comment) = undef;
2653                 warn "$prefix: $err";
2654                 next;
2655             }
2656
2657             $res->{$section}->{$group} = [];
2658             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2659                 if $comment;
2660             next;
2661         }
2662
2663         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2664             $section = 'rules';
2665             next;
2666         }
2667
2668         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2669             $section = 'ipset';
2670             $group = lc($1);
2671             my $comment = $2;
2672             eval {
2673                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2674                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2675             };
2676             if (my $err = $@) {
2677                 ($section, $group, $comment) = undef;
2678                 warn "$prefix: $err";
2679                 next;
2680             }
2681
2682             $res->{$section}->{$group} = [];
2683             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2684                 if $comment;
2685             next;
2686         }
2687
2688         if (!$section) {
2689             warn "$prefix: skip line - no section\n";
2690             next;
2691         }
2692
2693         if ($section eq 'options') {
2694             eval {
2695                 my ($opt, $value);
2696                 if ($rule_env eq 'cluster') {
2697                     ($opt, $value) = parse_clusterfw_option($line);
2698                 } elsif ($rule_env eq 'host') {
2699                     ($opt, $value) = parse_hostfw_option($line);
2700                 } else {
2701                     ($opt, $value) = parse_vmfw_option($line);
2702                 }
2703                 $res->{options}->{$opt} = $value;
2704             };
2705             warn "$prefix: $@" if $@;
2706         } elsif ($section eq 'aliases') {
2707             eval {
2708                 my $data = parse_alias($line);
2709                 $res->{aliases}->{lc($data->{name})} = $data;
2710             };
2711             warn "$prefix: $@" if $@;
2712         } elsif ($section eq 'rules') {
2713             my $rule;
2714             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2715             if (my $err = $@) {
2716                 warn "$prefix: $err";
2717                 next;
2718             }
2719             push @{$res->{$section}}, $rule;
2720         } elsif ($section eq 'groups') {
2721             my $rule;
2722             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2723             if (my $err = $@) {
2724                 warn "$prefix: $err";
2725                 next;
2726             }
2727             push @{$res->{$section}->{$group}}, $rule;
2728         } elsif ($section eq 'ipset') {
2729             # we can add single line comments to the end of the rule
2730             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2731
2732             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2733             my $nomatch = $1;
2734             my $cidr = $2;
2735             my $errors;
2736
2737             if ($nomatch && !$feature_ipset_nomatch) {
2738                 $errors->{nomatch} = "nomatch not supported by kernel";
2739             }
2740
2741             eval {
2742                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2743                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2744                 } else {
2745                     $cidr = parse_ip_or_cidr($cidr);
2746                 }
2747             };
2748             if (my $err = $@) {
2749                 chomp $err;
2750                 $errors->{cidr} = $err;
2751             }
2752
2753             my $entry = { cidr => $cidr };
2754             $entry->{nomatch} = 1 if $nomatch;
2755             $entry->{comment} = $comment if $comment;
2756             $entry->{errors} =  $errors if $errors;
2757
2758             if ($verbose && $errors) {
2759                 warn "$prefix - errors in ipset '$group': $line\n";
2760                 foreach my $p (keys %{$errors}) {
2761                     warn "  $p: $errors->{$p}\n";
2762                 }
2763             }
2764
2765             push @{$res->{$section}->{$group}}, $entry;
2766         } else {
2767             warn "$prefix: skip line - unknown section\n";
2768             next;
2769         }
2770     }
2771
2772     return $res;
2773 }
2774
2775 sub parse_hostfw_config {
2776     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2777
2778     my $empty_conf = { rules => [], options => {}};
2779
2780     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2781 }
2782
2783 sub parse_vmfw_config {
2784     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2785
2786     my $empty_conf = {
2787         rules => [],
2788         options => {},
2789         aliases => {},
2790         ipset => {} ,
2791         ipset_comments => {},
2792     };
2793
2794     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2795 }
2796
2797 sub parse_clusterfw_config {
2798     my ($filename, $fh, $verbose) = @_;
2799
2800     my $section;
2801     my $group;
2802
2803     my $empty_conf = {
2804         rules => [],
2805         options => {},
2806         aliases => {},
2807         groups => {},
2808         group_comments => {},
2809         ipset => {} ,
2810         ipset_comments => {},
2811     };
2812
2813     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2814 }
2815
2816 sub run_locked {
2817     my ($code, @param) = @_;
2818
2819     my $timeout = 10;
2820
2821     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2822
2823     die $@ if $@;
2824
2825     return $res;
2826 }
2827
2828 sub read_local_vm_config {
2829
2830     my $qemu = {};
2831     my $lxc = {};
2832
2833     my $vmdata = { qemu => $qemu, lxc => $lxc };
2834
2835     my $vmlist = PVE::Cluster::get_vmlist();
2836     return $vmdata if !$vmlist || !$vmlist->{ids};
2837     my $ids = $vmlist->{ids};
2838
2839     foreach my $vmid (keys %$ids) {
2840         next if !$vmid; # skip VE0
2841         my $d = $ids->{$vmid};
2842         next if !$d->{node} || $d->{node} ne $nodename;
2843         next if !$d->{type};
2844         if ($d->{type} eq 'qemu') {
2845             if ($have_qemu_server) {
2846                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2847                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2848                     $qemu->{$vmid} = $conf;
2849                 }
2850             }
2851         } elsif ($d->{type} eq 'lxc') {
2852             if ($have_lxc) {
2853                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2854                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2855                     $lxc->{$vmid} = $conf;
2856                 }
2857             }
2858         }
2859     }
2860
2861     return $vmdata;
2862 };
2863
2864 sub load_vmfw_conf {
2865     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2866
2867     my $vmfw_conf = {};
2868
2869     $dir = $pvefw_conf_dir if !defined($dir);
2870
2871     my $filename = "$dir/$vmid.fw";
2872     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2873         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2874         $vmfw_conf->{vmid} = $vmid;
2875     }
2876
2877     return $vmfw_conf;
2878 }
2879
2880 my $format_rules = sub {
2881     my ($rules, $allow_iface) = @_;
2882
2883     my $raw = '';
2884
2885     foreach my $rule (@$rules) {
2886         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2887             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2888             $raw .= uc($rule->{type});
2889             if ($rule->{macro}) {
2890                 $raw .= " $rule->{macro}($rule->{action})";
2891             } else {
2892                 $raw .= " " . $rule->{action};
2893             }
2894             if ($allow_iface && $rule->{iface}) {
2895                 $raw .= " -i $rule->{iface}";
2896             }
2897
2898             if ($rule->{type} ne  'group')  {
2899                 $raw .= " -source $rule->{source}" if $rule->{source};
2900                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2901                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2902                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2903                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2904             }
2905
2906             $raw .= " # " . encode('utf8', $rule->{comment})
2907                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2908             $raw .= "\n";
2909         } else {
2910             die "unknown rule type '$rule->{type}'";
2911         }
2912     }
2913
2914     return $raw;
2915 };
2916
2917 my $format_options = sub {
2918     my ($options) = @_;
2919
2920     my $raw = '';
2921
2922     $raw .= "[OPTIONS]\n\n";
2923     foreach my $opt (keys %$options) {
2924         $raw .= "$opt: $options->{$opt}\n";
2925     }
2926     $raw .= "\n";
2927
2928     return $raw;
2929 };
2930
2931 my $format_aliases = sub {
2932     my ($aliases) = @_;
2933
2934     my $raw = '';
2935
2936     $raw .= "[ALIASES]\n\n";
2937     foreach my $k (keys %$aliases) {
2938         my $e = $aliases->{$k};
2939         $raw .= "$e->{name} $e->{cidr}";
2940         $raw .= " # " . encode('utf8', $e->{comment})
2941             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2942         $raw .= "\n";
2943     }
2944     $raw .= "\n";
2945
2946     return $raw;
2947 };
2948
2949 my $format_ipsets = sub {
2950     my ($fw_conf) = @_;
2951
2952     my $raw = '';
2953
2954     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2955         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2956             my $utf8comment = encode('utf8', $comment);
2957             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2958         } else {
2959             $raw .= "[IPSET $ipset]\n\n";
2960         }
2961         my $options = $fw_conf->{ipset}->{$ipset};
2962
2963         my $nethash = {};
2964         foreach my $entry (@$options) {
2965             $nethash->{$entry->{cidr}} = $entry;
2966         }
2967
2968         foreach my $cidr (sort keys %$nethash) {
2969             my $entry = $nethash->{$cidr};
2970             my $line = $entry->{nomatch} ? '!' : '';
2971             $line .= $entry->{cidr};
2972             $line .= " # " . encode('utf8', $entry->{comment})
2973                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2974             $raw .= "$line\n";
2975         }
2976
2977         $raw .= "\n";
2978     }
2979
2980     return $raw;
2981 };
2982
2983 sub save_vmfw_conf {
2984     my ($vmid, $vmfw_conf) = @_;
2985
2986     my $raw = '';
2987
2988     my $options = $vmfw_conf->{options};
2989     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2990
2991     my $aliases = $vmfw_conf->{aliases};
2992     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2993
2994     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2995
2996     my $rules = $vmfw_conf->{rules} || [];
2997     if ($rules && scalar(@$rules)) {
2998         $raw .= "[RULES]\n\n";
2999         $raw .= &$format_rules($rules, 1);
3000         $raw .= "\n";
3001     }
3002
3003     my $filename = "$pvefw_conf_dir/$vmid.fw";
3004     if ($raw) {
3005         mkdir $pvefw_conf_dir;
3006         PVE::Tools::file_set_contents($filename, $raw);
3007     } else {
3008         unlink $filename;
3009     }
3010 }
3011
3012 sub remove_vmfw_conf {
3013     my ($vmid) = @_;
3014
3015     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3016
3017     unlink $vmfw_conffile;
3018 }
3019
3020 sub clone_vmfw_conf {
3021     my ($vmid, $newid) = @_;
3022
3023     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3024     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3025
3026     if (-f $clonevm_conffile) {
3027         unlink $clonevm_conffile;
3028     }
3029     if (-f $sourcevm_conffile) {
3030         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3031         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3032     }
3033 }
3034
3035 sub read_vm_firewall_configs {
3036     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3037
3038     my $vmfw_configs = {};
3039
3040     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3041         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3042         next if !$vmfw_conf->{options}; # skip if file does not exists
3043         $vmfw_configs->{$vmid} = $vmfw_conf;
3044     }
3045     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3046         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3047         next if !$vmfw_conf->{options}; # skip if file does not exists
3048         $vmfw_configs->{$vmid} = $vmfw_conf;
3049     }
3050
3051     return $vmfw_configs;
3052 }
3053
3054 sub get_option_log_level {
3055     my ($options, $k) = @_;
3056
3057     my $v = $options->{$k};
3058     $v = $default_log_level if !defined($v);
3059
3060     return undef if $v eq '' || $v eq 'nolog';
3061
3062     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3063
3064     return $v if ($v >= 0) && ($v <= 7);
3065
3066     warn "unknown log level ($k = '$v')\n";
3067
3068     return undef;
3069 }
3070
3071 sub generate_std_chains {
3072     my ($ruleset, $options, $ipversion) = @_;
3073
3074     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3075
3076     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3077
3078     my $chain;
3079
3080     if ($ipversion == 4) {
3081         # same as shorewall smurflog.
3082         $chain = 'PVEFW-smurflog';
3083         $std_chains->{$chain} = [];
3084
3085         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3086         push @{$std_chains->{$chain}}, "-j DROP";
3087     }
3088
3089     # same as shorewall logflags action.
3090     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3091     $chain = 'PVEFW-logflags';
3092     $std_chains->{$chain} = [];
3093
3094     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3095     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3096     push @{$std_chains->{$chain}}, "-j DROP";
3097
3098     foreach my $chain (keys %$std_chains) {
3099         ruleset_create_chain($ruleset, $chain);
3100         foreach my $rule (@{$std_chains->{$chain}}) {
3101             if (ref($rule)) {
3102                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3103             } else {
3104                 ruleset_addrule($ruleset, $chain, $rule);
3105             }
3106         }
3107     }
3108 }
3109
3110 sub generate_ipset_chains {
3111     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3112
3113     foreach my $ipset (keys %{$ipsets}) {
3114
3115         my $options = $ipsets->{$ipset};
3116
3117         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3118             if (my $ips = $device_ips->{$1}) {
3119                 $options = [@$options, @$ips];
3120             }
3121         }
3122
3123         # remove duplicates
3124         my $nethash = {};
3125         foreach my $entry (@$options) {
3126             next if $entry->{errors}; # skip entries with errors
3127             eval {
3128                 my ($cidr, $ver);
3129                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3130                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3131                 } else {
3132                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3133                 }
3134                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3135                 if ($ver == 6) {
3136                     # ip_compress_address takes an address only, no CIDR
3137                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3138                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3139                     $cidr .= $prefix_len if defined($prefix_len);
3140                     $cidr =~ s|/128$||;
3141                 } else {
3142                     $cidr =~ s|/32$||;
3143                 }
3144
3145                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3146             };
3147             warn $@ if $@;
3148         }
3149
3150         foreach my $ipversion (4, 6) {
3151             my $data = $nethash->{$ipversion};
3152
3153             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3154
3155             my $hashsize = scalar(@$options);
3156             if ($hashsize <= 64) {
3157                 $hashsize = 64;
3158             } else {
3159                 $hashsize = round_powerof2($hashsize);
3160             }
3161
3162             my $family = $ipversion == "6" ? "inet6" : "inet";
3163
3164             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3165
3166             foreach my $cidr (sort keys %$data) {
3167                 my $entry = $data->{$cidr};
3168
3169                 my $cmd = "add $name $cidr";
3170                 if ($entry->{nomatch}) {
3171                     if ($feature_ipset_nomatch) {
3172                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3173                     } else {
3174                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3175                     }
3176                 } else {
3177                     push @{$ipset_ruleset->{$name}}, $cmd;
3178                 }
3179             }
3180         }
3181     }
3182 }
3183
3184 sub round_powerof2 {
3185     my ($int) = @_;
3186
3187     $int--;
3188     $int |= $int >> $_ foreach (1,2,4,8,16);
3189     return ++$int;
3190 }
3191
3192 sub load_clusterfw_conf {
3193     my ($filename, $verbose) = @_;
3194
3195     $filename = $clusterfw_conf_filename if !defined($filename);
3196
3197     my $cluster_conf = {};
3198     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3199         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3200     }
3201
3202     return $cluster_conf;
3203 }
3204
3205 sub save_clusterfw_conf {
3206     my ($cluster_conf) = @_;
3207
3208     my $raw = '';
3209
3210     my $options = $cluster_conf->{options};
3211     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3212
3213     my $aliases = $cluster_conf->{aliases};
3214     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3215
3216     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3217
3218     my $rules = $cluster_conf->{rules};
3219     if ($rules && scalar(@$rules)) {
3220         $raw .= "[RULES]\n\n";
3221         $raw .= &$format_rules($rules, 1);
3222         $raw .= "\n";
3223     }
3224
3225     if ($cluster_conf->{groups}) {
3226         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3227             my $rules = $cluster_conf->{groups}->{$group};
3228             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3229                 my $utf8comment = encode('utf8', $comment);
3230                 $raw .= "[group $group] # $utf8comment\n\n";
3231             } else {
3232                 $raw .= "[group $group]\n\n";
3233             }
3234
3235             $raw .= &$format_rules($rules, 0);
3236             $raw .= "\n";
3237         }
3238     }
3239
3240     if ($raw) {
3241         mkdir $pvefw_conf_dir;
3242         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3243     } else {
3244         unlink $clusterfw_conf_filename;
3245     }
3246 }
3247
3248 sub load_hostfw_conf {
3249     my ($cluster_conf, $filename, $verbose) = @_;
3250
3251     $filename = $hostfw_conf_filename if !defined($filename);
3252
3253     my $hostfw_conf = {};
3254     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3255         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3256     }
3257     return $hostfw_conf;
3258 }
3259
3260 sub save_hostfw_conf {
3261     my ($hostfw_conf) = @_;
3262
3263     my $raw = '';
3264
3265     my $options = $hostfw_conf->{options};
3266     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3267
3268     my $rules = $hostfw_conf->{rules};
3269     if ($rules && scalar(@$rules)) {
3270         $raw .= "[RULES]\n\n";
3271         $raw .= &$format_rules($rules, 1);
3272         $raw .= "\n";
3273     }
3274
3275     if ($raw) {
3276         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3277     } else {
3278         unlink $hostfw_conf_filename;
3279     }
3280 }
3281
3282 sub compile {
3283     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3284
3285     my $vmfw_configs;
3286
3287     if ($vmdata) { # test mode
3288         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3289         my $filename = "$testdir/cluster.fw";
3290         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3291
3292         $filename = "$testdir/host.fw";
3293         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3294
3295         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3296     } else { # normal operation
3297         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3298
3299         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3300
3301         $vmdata = read_local_vm_config();
3302         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3303     }
3304
3305     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3306
3307     my $localnet;
3308     if ($cluster_conf->{aliases}->{local_network}) {
3309         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3310     } else {
3311         my $localnet_ver;
3312         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3313
3314         $cluster_conf->{aliases}->{local_network} = {
3315             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3316     }
3317
3318     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3319
3320     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3321     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3322     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3323
3324     return ($ruleset, $ipset_ruleset, $rulesetv6);
3325 }
3326
3327 sub compile_iptables_filter {
3328     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3329
3330     my $ruleset = {};
3331
3332     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3333     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3334
3335     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3336
3337     my $hostfw_options = $hostfw_conf->{options} || {};
3338
3339     # fixme: what log level should we use here?
3340     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3341
3342     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3343
3344     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3345     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3346
3347     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3348
3349     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3350     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3351
3352     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3353
3354     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3355
3356     if ($hostfw_enable) {
3357         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3358         warn $@ if $@; # just to be sure - should not happen
3359     }
3360
3361     # generate firewall rules for QEMU VMs
3362     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3363         eval {
3364             my $conf = $vmdata->{qemu}->{$vmid};
3365             my $vmfw_conf = $vmfw_configs->{$vmid};
3366             return if !$vmfw_conf;
3367
3368             foreach my $netid (sort keys %$conf) {
3369                 next if $netid !~ m/^net(\d+)$/;
3370                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3371                 next if !$net->{firewall};
3372                 my $iface = "tap${vmid}i$1";
3373
3374                 my $macaddr = $net->{macaddr};
3375                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3376                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3377                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3378                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3379             }
3380         };
3381         warn $@ if $@; # just to be sure - should not happen
3382     }
3383
3384     # generate firewall rules for LXC containers
3385     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3386         eval {
3387             my $conf = $vmdata->{lxc}->{$vmid};
3388             my $vmfw_conf = $vmfw_configs->{$vmid};
3389             return if !$vmfw_conf;
3390
3391             if ($vmfw_conf->{options}->{enable}) {
3392                 foreach my $netid (sort keys %$conf) {
3393                     next if $netid !~ m/^net(\d+)$/;
3394                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3395                     next if !$net->{firewall};
3396                     my $iface = "veth${vmid}i$1";
3397                     my $macaddr = $net->{hwaddr};
3398                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3399                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3400                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3401                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3402                 }
3403             }
3404         };
3405         warn $@ if $@; # just to be sure - should not happen
3406     }
3407
3408     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3409         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3410     }
3411
3412     return $ruleset;
3413 }
3414
3415 sub mac_to_linklocal {
3416     my ($macaddr) = @_;
3417     my @parts = split(/:/, $macaddr);
3418     # The standard link local address uses the fe80::/64 prefix with the
3419     # modified EUI-64 identifier derived from the MAC address by flipping the
3420     # universal/local bit and inserting FF:FE in the middle.
3421     # See RFC 4291.
3422     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3423     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3424     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3425 }
3426
3427 sub compile_ipsets {
3428     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3429
3430     my $localnet;
3431     if ($cluster_conf->{aliases}->{local_network}) {
3432         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3433     } else {
3434         my $localnet_ver;
3435         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3436
3437         $cluster_conf->{aliases}->{local_network} = {
3438             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3439     }
3440
3441     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3442
3443
3444     my $ipset_ruleset = {};
3445
3446     # generate ipsets for QEMU VMs
3447     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3448         eval {
3449             my $conf = $vmdata->{qemu}->{$vmid};
3450             my $vmfw_conf = $vmfw_configs->{$vmid};
3451             return if !$vmfw_conf;
3452
3453             # When the 'ipfilter' option is enabled every device for which there
3454             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3455             # ipset.
3456             # The reason is that ipfilter ipsets are always filled with standard
3457             # IPv6 link-local filters.
3458             my $ipsets = $vmfw_conf->{ipset};
3459             my $implicit_sets = {};
3460
3461             my $device_ips = {};
3462             foreach my $netid (keys %$conf) {
3463                 next if $netid !~ m/^net(\d+)$/;
3464                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3465                 next if !$net->{firewall};
3466
3467                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3468                     $implicit_sets->{"ipfilter-$netid"} = [];
3469                 }
3470
3471                 my $macaddr = $net->{macaddr};
3472                 my $linklocal = mac_to_linklocal($macaddr);
3473                 $device_ips->{$netid} = [
3474                     { cidr => $linklocal },
3475                     { cidr => 'fe80::/10', nomatch => 1 }
3476                 ];
3477             }
3478
3479             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3480             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3481         };
3482         warn $@ if $@; # just to be sure - should not happen
3483     }
3484
3485     # generate firewall rules for LXC containers
3486     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3487         eval {
3488             my $conf = $vmdata->{lxc}->{$vmid};
3489             my $vmfw_conf = $vmfw_configs->{$vmid};
3490             return if !$vmfw_conf;
3491
3492             # When the 'ipfilter' option is enabled every device for which there
3493             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3494             # ipset.
3495             # The reason is that ipfilter ipsets are always filled with standard
3496             # IPv6 link-local filters, as well as the IP addresses configured
3497             # for the container.
3498             my $ipsets = $vmfw_conf->{ipset};
3499             my $implicit_sets = {};
3500
3501             my $device_ips = {};
3502             foreach my $netid (keys %$conf) {
3503                 next if $netid !~ m/^net(\d+)$/;
3504                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3505                 next if !$net->{firewall};
3506
3507                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3508                     $implicit_sets->{"ipfilter-$netid"} = [];
3509                 }
3510
3511                 my $macaddr = $net->{hwaddr};
3512                 my $linklocal = mac_to_linklocal($macaddr);
3513                 my $set = $device_ips->{$netid} = [
3514                     { cidr => $linklocal },
3515                     { cidr => 'fe80::/10', nomatch => 1 }
3516                 ];
3517                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3518                     push @$set, { cidr => $1 };
3519                 }
3520                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3521                     push @$set, { cidr => $1 };
3522                 }
3523             }
3524
3525             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3526             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3527         };
3528         warn $@ if $@; # just to be sure - should not happen
3529     }
3530
3531     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3532
3533     return $ipset_ruleset;
3534 }
3535
3536 sub get_ruleset_status {
3537     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3538
3539     my $statushash = {};
3540
3541     foreach my $chain (sort keys %$ruleset) {
3542         my $sig = &$digest_fn($ruleset->{$chain});
3543
3544         $statushash->{$chain}->{sig} = $sig;
3545
3546         my $oldsig = $active_chains->{$chain};
3547         if (!defined($oldsig)) {
3548             $statushash->{$chain}->{action} = 'create';
3549         } else {
3550             if ($oldsig eq $sig) {
3551                 $statushash->{$chain}->{action} = 'exists';
3552             } else {
3553                 $statushash->{$chain}->{action} = 'update';
3554             }
3555         }
3556         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3557         foreach my $cmd (@{$ruleset->{$chain}}) {
3558             print "\t$cmd\n" if $verbose;
3559         }
3560     }
3561
3562     foreach my $chain (sort keys %$active_chains) {
3563         if (!defined($ruleset->{$chain})) {
3564             my $sig = $active_chains->{$chain};
3565             $statushash->{$chain}->{action} = 'delete';
3566             $statushash->{$chain}->{sig} = $sig;
3567             print "delete $chain ($sig)\n" if $verbose;
3568         }
3569     }
3570
3571     return $statushash;
3572 }
3573
3574 sub print_sig_rule {
3575     my ($chain, $sig) = @_;
3576
3577     # We just use this to store a SHA1 checksum used to detect changes
3578     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3579 }
3580
3581 sub get_ruleset_cmdlist {
3582     my ($ruleset, $verbose, $iptablescmd) = @_;
3583
3584     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3585
3586     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3587     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3588
3589     # create missing chains first
3590     foreach my $chain (sort keys %$ruleset) {
3591         my $stat = $statushash->{$chain};
3592         die "internal error" if !$stat;
3593         next if $stat->{action} ne 'create';
3594
3595         $cmdlist .= ":$chain - [0:0]\n";
3596     }
3597
3598     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3599         my $chain = "PVEFW-$h";
3600         if ($ruleset->{$chain} && !$hooks->{$h}) {
3601             $cmdlist .= "-A $h -j $chain\n";
3602         }
3603     }
3604
3605     foreach my $chain (sort keys %$ruleset) {
3606         my $stat = $statushash->{$chain};
3607         die "internal error" if !$stat;
3608
3609         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3610             $cmdlist .= "-F $chain\n";
3611             foreach my $cmd (@{$ruleset->{$chain}}) {
3612                 $cmdlist .= "$cmd\n";
3613             }
3614             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3615         } elsif ($stat->{action} eq 'delete') {
3616             die "internal error"; # this should not happen
3617         } elsif ($stat->{action} eq 'exists') {
3618             # do nothing
3619         } else {
3620             die "internal error - unknown status '$stat->{action}'";
3621         }
3622     }
3623
3624     foreach my $chain (keys %$statushash) {
3625         next if $statushash->{$chain}->{action} ne 'delete';
3626         $cmdlist .= "-F $chain\n";
3627     }
3628     foreach my $chain (keys %$statushash) {
3629         next if $statushash->{$chain}->{action} ne 'delete';
3630         next if $chain eq 'PVEFW-INPUT';
3631         next if $chain eq 'PVEFW-OUTPUT';
3632         next if $chain eq 'PVEFW-FORWARD';
3633         $cmdlist .= "-X $chain\n";
3634     }
3635
3636     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3637
3638     $cmdlist .= "COMMIT\n";
3639
3640     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3641 }
3642
3643 sub get_ipset_cmdlist {
3644     my ($ruleset, $verbose) = @_;
3645
3646     my $cmdlist = "";
3647
3648     my $delete_cmdlist = "";
3649
3650     my $active_chains = ipset_get_chains();
3651     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3652
3653     # remove stale _swap chains
3654     foreach my $chain (keys %$active_chains) {
3655         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3656             $cmdlist .= "destroy $chain\n";
3657         }
3658     }
3659
3660     foreach my $chain (keys %$ruleset) {
3661         my $stat = $statushash->{$chain};
3662         die "internal error" if !$stat;
3663
3664         if ($stat->{action} eq 'create') {
3665             foreach my $cmd (@{$ruleset->{$chain}}) {
3666                 $cmdlist .= "$cmd\n";
3667             }
3668         }
3669     }
3670
3671     foreach my $chain (keys %$ruleset) {
3672         my $stat = $statushash->{$chain};
3673         die "internal error" if !$stat;
3674
3675         if ($stat->{action} eq 'update') {
3676             my $chain_swap = $chain."_swap";
3677
3678             foreach my $cmd (@{$ruleset->{$chain}}) {
3679                 $cmd =~ s/$chain/$chain_swap/;
3680                 $cmdlist .= "$cmd\n";
3681             }
3682             $cmdlist .= "swap $chain_swap $chain\n";
3683             $cmdlist .= "flush $chain_swap\n";
3684             $cmdlist .= "destroy $chain_swap\n";
3685         }
3686     }
3687
3688      # the remove unused chains
3689     foreach my $chain (keys %$statushash) {
3690         next if $statushash->{$chain}->{action} ne 'delete';
3691
3692         $delete_cmdlist .= "flush $chain\n";
3693         $delete_cmdlist .= "destroy $chain\n";
3694     }
3695
3696     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3697
3698     return ($cmdlist, $delete_cmdlist, $changes);
3699 }
3700
3701 sub apply_ruleset {
3702     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3703
3704     enable_bridge_firewall();
3705
3706     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3707         get_ipset_cmdlist($ipset_ruleset, $verbose);
3708
3709     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3710     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3711
3712     if ($verbose) {
3713         if ($ipset_changes) {
3714             print "ipset changes:\n";
3715             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3716             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3717         }
3718
3719         if ($changes) {
3720             print "iptables changes:\n";
3721             print $cmdlist;
3722         }
3723
3724         if ($changesv6) {
3725             print "ip6tables changes:\n";
3726             print $cmdlistv6;
3727         }
3728     }
3729
3730     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3731     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3732
3733     ipset_restore_cmdlist($ipset_create_cmdlist);
3734
3735     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3736     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3737
3738     iptables_restore_cmdlist($cmdlist);
3739
3740     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3741     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3742
3743     ip6tables_restore_cmdlist($cmdlistv6);
3744
3745     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3746     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3747
3748     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3749
3750     # test: re-read status and check if everything is up to date
3751     my $active_chains = iptables_get_chains();
3752     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3753
3754     my $errors;
3755     foreach my $chain (sort keys %$ruleset) {
3756         my $stat = $statushash->{$chain};
3757         if ($stat->{action} ne 'exists') {
3758             warn "unable to update chain '$chain'\n";
3759             $errors = 1;
3760         }
3761     }
3762
3763     my $active_chainsv6 = iptables_get_chains("ip6tables");
3764     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3765
3766     foreach my $chain (sort keys %$rulesetv6) {
3767         my $stat = $statushashv6->{$chain};
3768         if ($stat->{action} ne 'exists') {
3769             warn "unable to update chain '$chain'\n";
3770             $errors = 1;
3771         }
3772     }
3773
3774     die "unable to apply firewall changes\n" if $errors;
3775
3776     update_nf_conntrack_max($hostfw_conf);
3777
3778     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3779
3780 }
3781
3782 sub update_nf_conntrack_max {
3783     my ($hostfw_conf) = @_;
3784
3785     my $max = 65536; # reasonable default
3786
3787     my $options = $hostfw_conf->{options} || {};
3788
3789     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3790         $max = $options->{nf_conntrack_max};
3791         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3792     }
3793
3794     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3795     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3796
3797     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3798
3799     if ($current != $max) {
3800         my $hashsize = int($max/4);
3801         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3802         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3803     }
3804 }
3805
3806 sub update_nf_conntrack_tcp_timeout_established {
3807     my ($hostfw_conf) = @_;
3808
3809     my $options = $hostfw_conf->{options} || {};
3810
3811     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3812
3813     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3814 }
3815
3816 sub remove_pvefw_chains {
3817
3818     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3819     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3820     PVE::Firewall::remove_pvefw_chains_ipset();
3821
3822 }
3823
3824 sub remove_pvefw_chains_iptables {
3825     my ($iptablescmd) = @_;
3826
3827     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3828     my $cmdlist = "*filter\n";
3829
3830     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3831         if ($hooks->{$h}) {
3832             $cmdlist .= "-D $h -j PVEFW-$h\n";
3833         }
3834     }
3835
3836     foreach my $chain (keys %$chash) {
3837         $cmdlist .= "-F $chain\n";
3838     }
3839
3840     foreach my $chain (keys %$chash) {
3841         $cmdlist .= "-X $chain\n";
3842     }
3843     $cmdlist .= "COMMIT\n";
3844
3845     if($iptablescmd eq "ip6tables") {
3846         ip6tables_restore_cmdlist($cmdlist);
3847     } else {
3848         iptables_restore_cmdlist($cmdlist);
3849     }
3850 }
3851
3852 sub remove_pvefw_chains_ipset {
3853
3854     my $ipset_chains = ipset_get_chains();
3855
3856     my $cmdlist = "";
3857
3858     foreach my $chain (keys %$ipset_chains) {
3859         $cmdlist .= "flush $chain\n";
3860         $cmdlist .= "destroy $chain\n";
3861     }
3862
3863     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3864 }
3865
3866 sub init {
3867     my $cluster_conf = load_clusterfw_conf();
3868     my $cluster_options = $cluster_conf->{options};
3869     my $enable = $cluster_options->{enable};
3870
3871     return if !$enable;
3872
3873     # load required modules here
3874 }
3875
3876 sub update {
3877     my $code = sub {
3878
3879         my $cluster_conf = load_clusterfw_conf();
3880         my $cluster_options = $cluster_conf->{options};
3881
3882         if (!$cluster_options->{enable}) {
3883             PVE::Firewall::remove_pvefw_chains();
3884             return;
3885         }
3886
3887         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3888
3889         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3890
3891         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3892     };
3893
3894     run_locked($code);
3895 }
3896
3897 1;