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 PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'nolog'; # avoid logs by default
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162     ],
 163     'DNS' => [
 164         "Domain Name System traffic (upd and tcp)",
 165         { action => 'PARAM', proto => 'udp', dport => '53' },
 166         { action => 'PARAM', proto => 'tcp', dport => '53' },
 167     ],
 168     'Distcc' => [
 169         "Distributed Compiler service",
 170         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 171     ],
 172     'FTP' => [
 173         "File Transfer Protocol",
 174         { action => 'PARAM', proto => 'tcp', dport => '21' },
 175     ],
 176     'Finger' => [
 177         "Finger protocol (RFC 742)",
 178         { action => 'PARAM', proto => 'tcp', dport => '79' },
 179     ],
 180     'GNUnet' => [
 181         "GNUnet secure peer-to-peer networking traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 183         { action => 'PARAM', proto => 'udp', dport => '2086' },
 184         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 185         { action => 'PARAM', proto => 'udp', dport => '1080' },
 186     ],
 187     'GRE' => [
 188         "Generic Routing Encapsulation tunneling protocol",
 189         { action => 'PARAM', proto => '47' },
 190     ],
 191     'Git' => [
 192         "Git distributed revision control traffic",
 193         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 194     ],
 195     'HKP' => [
 196         "OpenPGP HTTP keyserver protocol traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 198     ],
 199     'HTTP' => [
 200         "Hypertext Transfer Protocol (WWW)",
 201         { action => 'PARAM', proto => 'tcp', dport => '80' },
 202     ],
 203     'HTTPS' => [
 204         "Hypertext Transfer Protocol (WWW) over SSL",
 205         { action => 'PARAM', proto => 'tcp', dport => '443' },
 206     ],
 207     'ICPV2' => [
 208         "Internet Cache Protocol V2 (Squid) traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '3130' },
 210     ],
 211     'ICQ' => [
 212         "AOL Instant Messenger traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 214     ],
 215     'IMAP' => [
 216         "Internet Message Access Protocol",
 217         { action => 'PARAM', proto => 'tcp', dport => '143' },
 218     ],
 219     'IMAPS' => [
 220         "Internet Message Access Protocol over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '993' },
 222     ],
 223     'IPIP' => [
 224         "IPIP capsulation traffic",
 225         { action => 'PARAM', proto => '94' },
 226     ],
 227     'IPsec' => [
 228         "IPsec traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 230         { action => 'PARAM', proto => '50' },
 231     ],
 232     'IPsecah' => [
 233         "IPsec authentication (AH) traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242     ],
 243     'IRC' => [
 244         "Internet Relay Chat traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 246     ],
 247     'Jetdirect' => [
 248         "HP Jetdirect printing",
 249         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 250     ],
 251     'L2TP' => [
 252         "Layer 2 Tunneling Protocol traffic",
 253         { action => 'PARAM', proto => 'udp', dport => '1701' },
 254     ],
 255     'LDAP' => [
 256         "Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '389' },
 258     ],
 259     'LDAPS' => [
 260         "Secure Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '636' },
 262     ],
 263     'MSNP' => [
 264         "Microsoft Notification Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 266     ],
 267     'MSSQL' => [
 268         "Microsoft SQL Server",
 269         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 270     ],
 271     'Mail' => [
 272         "Mail traffic (SMTP, SMTPS, Submission)",
 273         { action => 'PARAM', proto => 'tcp', dport => '25' },
 274         { action => 'PARAM', proto => 'tcp', dport => '465' },
 275         { action => 'PARAM', proto => 'tcp', dport => '587' },
 276     ],
 277     'Munin' => [
 278         "Munin networked resource monitoring traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 280     ],
 281     'MySQL' => [
 282         "MySQL server",
 283         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 284     ],
 285     'NNTP' => [
 286         "NNTP traffic (Usenet).",
 287         { action => 'PARAM', proto => 'tcp', dport => '119' },
 288     ],
 289     'NNTPS' => [
 290         "Encrypted NNTP traffic (Usenet)",
 291         { action => 'PARAM', proto => 'tcp', dport => '563' },
 292     ],
 293     'NTP' => [
 294         "Network Time Protocol (ntpd)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296     ],
 297     'OSPF' => [
 298         "OSPF multicast traffic",
 299         { action => 'PARAM', proto => '89' },
 300     ],
 301     'OpenVPN' => [
 302         "OpenVPN traffic",
 303         { action => 'PARAM', proto => 'udp', dport => '1194' },
 304     ],
 305     'PCA' => [
 306         "Symantec PCAnywere (tm)",
 307         { action => 'PARAM', proto => 'udp', dport => '5632' },
 308         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 309     ],
 310     'POP3' => [
 311         "POP3 traffic",
 312         { action => 'PARAM', proto => 'tcp', dport => '110' },
 313     ],
 314     'POP3S' => [
 315         "Encrypted POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '995' },
 317     ],
 318     'PPtP' => [
 319         "Point-to-Point Tunneling Protocol",
 320         { action => 'PARAM', proto => '47' },
 321         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 322     ],
 323     'Ping' => [
 324         "ICMP echo request",
 325         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 326     ],
 327     'PostgreSQL' => [
 328         "PostgreSQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 330     ],
 331     'Printer' => [
 332         "Line Printer protocol printing",
 333         { action => 'PARAM', proto => 'tcp', dport => '515' },
 334     ],
 335     'RDP' => [
 336         "Microsoft Remote Desktop Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 338     ],
 339     'RIP' => [
 340         "Routing Information Protocol (bidirectional)",
 341         { action => 'PARAM', proto => 'udp', dport => '520' },
 342     ],
 343     'RNDC' => [
 344         "BIND remote management protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '953' },
 346     ],
 347     'Razor' => [
 348         "Razor Antispam System",
 349         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 350     ],
 351     'Rdate' => [
 352         "Remote time retrieval (rdate)",
 353         { action => 'PARAM', proto => 'tcp', dport => '37' },
 354     ],
 355     'Rsync' => [
 356         "Rsync server",
 357         { action => 'PARAM', proto => 'tcp', dport => '873' },
 358     ],
 359     'SANE' => [
 360         "SANE network scanning",
 361         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 362     ],
 363     'SMB' => [
 364         "Microsoft SMB traffic",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369     ],
 370     'SMBswat' => [
 371         "Samba Web Administration Tool",
 372         { action => 'PARAM', proto => 'tcp', dport => '901' },
 373     ],
 374     'SMTP' => [
 375         "Simple Mail Transfer Protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '25' },
 377     ],
 378     'SMTPS' => [
 379         "Encrypted Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '465' },
 381     ],
 382     'SNMP' => [
 383         "Simple Network Management Protocol",
 384         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 385         { action => 'PARAM', proto => 'tcp', dport => '161' },
 386     ],
 387     'SPAMD' => [
 388         "Spam Assassin SPAMD traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '783' },
 390     ],
 391     'SSH' => [
 392         "Secure shell traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '22' },
 394     ],
 395     'SVN' => [
 396         "Subversion server (svnserve)",
 397         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 398     ],
 399     'SixXS' => [
 400         "SixXS IPv6 Deployment and Tunnel Broker",
 401         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 402         { action => 'PARAM', proto => 'udp', dport => '3740' },
 403         { action => 'PARAM', proto => '41' },
 404         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 405     ],
 406     'Squid' => [
 407         "Squid web proxy traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 409     ],
 410     'Submission' => [
 411         "Mail message submission traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '587' },
 413     ],
 414     'Syslog' => [
 415         "Syslog protocol (RFC 5424) traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '514' },
 417         { action => 'PARAM', proto => 'tcp', dport => '514' },
 418     ],
 419     'TFTP' => [
 420         "Trivial File Transfer Protocol traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '69' },
 422     ],
 423     'Telnet' => [
 424         "Telnet traffic",
 425         { action => 'PARAM', proto => 'tcp', dport => '23' },
 426     ],
 427     'Telnets' => [
 428         "Telnet over SSL",
 429         { action => 'PARAM', proto => 'tcp', dport => '992' },
 430     ],
 431     'Time' => [
 432         "RFC 868 Time protocol",
 433         { action => 'PARAM', proto => 'tcp', dport => '37' },
 434     ],
 435     'Trcrt' => [
 436         "Traceroute (for up to 30 hops) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 438         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 439     ],
 440     'VNC' => [
 441         "VNC traffic for VNC display's 0 - 99",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 443     ],
 444     'VNCL' => [
 445         "VNC traffic from Vncservers to Vncviewers in listen mode",
 446         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 447     ],
 448     'Web' => [
 449         "WWW traffic (HTTP and HTTPS)",
 450         { action => 'PARAM', proto => 'tcp', dport => '80' },
 451         { action => 'PARAM', proto => 'tcp', dport => '443' },
 452     ],
 453     'Webcache' => [
 454         "Web Cache/Proxy traffic (port 8080)",
 455         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 456     ],
 457     'Webmin' => [
 458         "Webmin traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 460     ],
 461     'Whois' => [
 462         "Whois (nicname, RFC 3912) traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '43' },
 464     ],
 465 };
 466
 467 my $pve_fw_parsed_macros;
 468 my $pve_fw_macro_descr;
 469 my $pve_fw_preferred_macro_names = {};
 470
 471 my $pve_std_chains = {
 472     'PVEFW-SET-ACCEPT-MARK' => [
 473         "-j MARK --set-mark 1",
 474     ],
 475     'PVEFW-DropBroadcast' => [
 476         # same as shorewall 'Broadcast'
 477         # simply DROP BROADCAST/MULTICAST/ANYCAST
 478         # we can use this to reduce logging
 479         { action => 'DROP', dsttype => 'BROADCAST' },
 480         { action => 'DROP', dsttype => 'MULTICAST' },
 481         { action => 'DROP', dsttype => 'ANYCAST' },
 482         { action => 'DROP', dest => '224.0.0.0/4' },
 483     ],
 484     'PVEFW-reject' => [
 485         # same as shorewall 'reject'
 486         { action => 'DROP', dsttype => 'BROADCAST' },
 487         { action => 'DROP', source => '224.0.0.0/4' },
 488         { action => 'DROP', proto => 'icmp' },
 489         "-p tcp -j REJECT --reject-with tcp-reset",
 490         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 491         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 492         "-j REJECT --reject-with icmp-host-prohibited",
 493     ],
 494     'PVEFW-Drop' => [
 495         # same as shorewall 'Drop', which is equal to DROP,
 496         # but REJECT/DROP some packages to reduce logging,
 497         # and ACCEPT critical ICMP types
 498         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 499         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 500         { action => 'PVEFW-DropBroadcast' },
 501         # ACCEPT critical ICMP types
 502         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 503         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 504         # Drop packets with INVALID state
 505         "-m conntrack --ctstate INVALID -j DROP",
 506         # Drop Microsoft SMB noise
 507         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 508         { action => 'DROP', proto => 'udp', dport => '137:139'},
 509         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 510         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 511         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 512         # Drop new/NotSyn traffic so that it doesn't get logged
 513         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 514         # Drop DNS replies
 515         { action => 'DROP', proto => 'udp', sport => 53 },
 516     ],
 517     'PVEFW-Reject' => [
 518         # same as shorewall 'Reject', which is equal to Reject,
 519         # but REJECT/DROP some packages to reduce logging,
 520         # and ACCEPT critical ICMP types
 521         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 522         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 523         { action => 'PVEFW-DropBroadcast' },
 524         # ACCEPT critical ICMP types
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 526         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 527         # Drop packets with INVALID state
 528         "-m conntrack --ctstate INVALID -j DROP",
 529         # Drop Microsoft SMB noise
 530         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 531         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 532         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 533         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 534         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 535         # Drop new/NotSyn traffic so that it doesn't get logged
 536         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 537         # Drop DNS replies
 538         { action => 'DROP', proto => 'udp', sport => 53 },
 539     ],
 540     'PVEFW-tcpflags' => [
 541         # same as shorewall tcpflags action.
 542         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 543         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 544         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 545         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 546         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 547         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 548     ],
 549     'PVEFW-smurfs' => [
 550         # same as shorewall smurfs action
 551         # Filter packets for smurfs (packets with a broadcast address as the source).
 552         "-s 0.0.0.0/32 -j RETURN",
 553         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 554         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 555     ],
 556 };
 557
 558 # iptables -p icmp -h
 559 my $icmp_type_names = {
 560     any => 1,
 561     'echo-reply' => 1,
 562     'destination-unreachable' => 1,
 563     'network-unreachable' => 1,
 564     'host-unreachable' => 1,
 565     'protocol-unreachable' => 1,
 566     'port-unreachable' => 1,
 567     'fragmentation-needed' => 1,
 568     'source-route-failed' => 1,
 569     'network-unknown' => 1,
 570     'host-unknown' => 1,
 571     'network-prohibited' => 1,
 572     'host-prohibited' => 1,
 573     'TOS-network-unreachable' => 1,
 574     'TOS-host-unreachable' => 1,
 575     'communication-prohibited' => 1,
 576     'host-precedence-violation' => 1,
 577     'precedence-cutoff' => 1,
 578     'source-quench' => 1,
 579     'redirect' => 1,
 580     'network-redirect' => 1,
 581     'host-redirect' => 1,
 582     'TOS-network-redirect' => 1,
 583     'TOS-host-redirect' => 1,
 584     'echo-request' => 1,
 585     'router-advertisement' => 1,
 586     'router-solicitation' => 1,
 587     'time-exceeded' => 1,
 588     'ttl-zero-during-transit' => 1,
 589     'ttl-zero-during-reassembly' => 1,
 590     'parameter-problem' => 1,
 591     'ip-header-bad' => 1,
 592     'required-option-missing' => 1,
 593     'timestamp-request' => 1,
 594     'timestamp-reply' => 1,
 595     'address-mask-request' => 1,
 596     'address-mask-reply' => 1,
 597 };
 598
 599 sub init_firewall_macros {
 600
 601     $pve_fw_parsed_macros = {};
 602
 603     foreach my $k (keys %$pve_fw_macros) {
 604         my $lc_name = lc($k);
 605         my $macro = $pve_fw_macros->{$k};
 606         if (!ref($macro->[0])) {
 607             $pve_fw_macro_descr->{$k} = shift @$macro;
 608         }
 609         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 610         $pve_fw_parsed_macros->{$k} = $macro;
 611     }
 612 }
 613
 614 init_firewall_macros();
 615
 616 sub get_macros {
 617     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 618 }
 619
 620 my $etc_services;
 621
 622 sub get_etc_services {
 623
 624     return $etc_services if $etc_services;
 625
 626     my $filename = "/etc/services";
 627
 628     my $fh = IO::File->new($filename, O_RDONLY);
 629     if (!$fh) {
 630         warn "unable to read '$filename' - $!\n";
 631         return {};
 632     }
 633
 634     my $services = {};
 635
 636     while (my $line = <$fh>) {
 637         chomp ($line);
 638         next if $line =~m/^#/;
 639         next if ($line =~m/^\s*$/);
 640
 641         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 642             $services->{byid}->{$2}->{name} = $1;
 643             $services->{byid}->{$2}->{port} = $2;
 644             $services->{byid}->{$2}->{$3} = 1;
 645             $services->{byname}->{$1} = $services->{byid}->{$2};
 646         }
 647     }
 648
 649     close($fh);
 650
 651     $etc_services = $services;
 652
 653
 654     return $etc_services;
 655 }
 656
 657 my $etc_protocols;
 658
 659 sub get_etc_protocols {
 660     return $etc_protocols if $etc_protocols;
 661
 662     my $filename = "/etc/protocols";
 663
 664     my $fh = IO::File->new($filename, O_RDONLY);
 665     if (!$fh) {
 666         warn "unable to read '$filename' - $!\n";
 667         return {};
 668     }
 669
 670     my $protocols = {};
 671
 672     while (my $line = <$fh>) {
 673         chomp ($line);
 674         next if $line =~m/^#/;
 675         next if ($line =~m/^\s*$/);
 676
 677         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 678             $protocols->{byid}->{$2}->{name} = $1;
 679             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 680         }
 681     }
 682
 683     close($fh);
 684
 685     $etc_protocols = $protocols;
 686
 687     return $etc_protocols;
 688 }
 689
 690 my $ipv4_mask_hash_localnet = {
 691     '255.255.0.0' => 16,
 692     '255.255.128.0' => 17,
 693     '255.255.192.0' => 18,
 694     '255.255.224.0' => 19,
 695     '255.255.240.0' => 20,
 696     '255.255.248.0' => 21,
 697     '255.255.252.0' => 22,
 698     '255.255.254.0' => 23,
 699     '255.255.255.0' => 24,
 700     '255.255.255.128' => 25,
 701     '255.255.255.192' => 26,
 702     '255.255.255.224' => 27,
 703     '255.255.255.240' => 28,
 704     '255.255.255.248' => 29,
 705     '255.255.255.252' => 30,
 706 };
 707
 708 my $__local_network;
 709
 710 sub local_network {
 711     my ($new_value) = @_;
 712
 713     $__local_network = $new_value if defined($new_value);
 714
 715     return $__local_network if defined($__local_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__local_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__local_network;
 740 }
 741
 742 sub parse_address_list {
 743     my ($str) = @_;
 744
 745     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 746     return if $str =~ m/^${ip_alias_pattern}$/;
 747
 748     my $count = 0;
 749     my $iprange = 0;
 750     foreach my $elem (split(/,/, $str)) {
 751         $count++;
 752         if (!Net::IP->new($elem)) {
 753             my $err = Net::IP::Error();
 754             die "invalid IP address: $err\n";
 755         }
 756         $iprange = 1 if $elem =~ m/-/;
 757     }
 758
 759     die "you can use a range in a list\n" if $iprange && $count > 1;
 760 }
 761
 762 sub parse_port_name_number_or_range {
 763     my ($str) = @_;
 764
 765     my $services = PVE::Firewall::get_etc_services();
 766     my $count = 0;
 767     my $icmp_port = 0;
 768
 769     foreach my $item (split(/,/, $str)) {
 770         $count++;
 771         if ($item =~ m/^(\d+):(\d+)$/) {
 772             my ($port1, $port2) = ($1, $2);
 773             die "invalid port '$port1'\n" if $port1 > 65535;
 774             die "invalid port '$port2'\n" if $port2 > 65535;
 775         } elsif ($item =~ m/^(\d+)$/) {
 776             my $port = $1;
 777             die "invalid port '$port'\n" if $port > 65535;
 778         } else {
 779             if ($icmp_type_names->{$item}) {
 780                 $icmp_port = 1;
 781             } else {
 782                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 783             }
 784         }
 785     }
 786
 787     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 788
 789     return $count;
 790 }
 791
 792 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 793 sub pve_fw_verify_port_spec {
 794    my ($portstr) = @_;
 795
 796    parse_port_name_number_or_range($portstr);
 797
 798    return $portstr;
 799 }
 800
 801 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 802 sub pve_fw_verify_v4addr_spec {
 803    my ($list) = @_;
 804
 805    parse_address_list($list);
 806
 807    return $list;
 808 }
 809
 810 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 811 sub pve_fw_verify_protocol_spec {
 812    my ($proto) = @_;
 813
 814    my $protocols = get_etc_protocols();
 815
 816    die "unknown protocol '$proto'\n" if $proto &&
 817        !(defined($protocols->{byname}->{$proto}) ||
 818          defined($protocols->{byid}->{$proto}));
 819
 820    return $proto;
 821 }
 822
 823
 824 # helper function for API
 825
 826 sub copy_opject_with_digest {
 827     my ($object) = @_;
 828
 829     my $sha = Digest::SHA->new('sha1');
 830
 831     my $res = {};
 832     foreach my $k (sort keys %$object) {
 833         my $v = $object->{$k};
 834         next if !defined($v);
 835         $res->{$k} = $v;
 836         $sha->add($k, ':', $v, "\n");
 837     }
 838
 839     my $digest = $sha->hexdigest;
 840
 841     $res->{digest} = $digest;
 842
 843     return wantarray ? ($res, $digest) : $res;
 844 }
 845
 846 sub copy_list_with_digest {
 847     my ($list) = @_;
 848
 849     my $sha = Digest::SHA->new('sha1');
 850
 851     my $res = [];
 852     foreach my $entry (@$list) {
 853         my $data = {};
 854         foreach my $k (sort keys %$entry) {
 855             my $v = $entry->{$k};
 856             next if !defined($v);
 857             $data->{$k} = $v;
 858             $sha->add($k, ':', $v, "\n");
 859         }
 860         push @$res, $data;
 861     }
 862
 863     my $digest = $sha->hexdigest;
 864
 865     foreach my $entry (@$res) {
 866         $entry->{digest} = $digest;
 867     }
 868
 869     return wantarray ? ($res, $digest) : $res;
 870 }
 871
 872 my $rule_properties = {
 873     pos => {
 874         description => "Update rule at position <pos>.",
 875         type => 'integer',
 876         minimum => 0,
 877         optional => 1,
 878     },
 879     digest => get_standard_option('pve-config-digest'),
 880     type => {
 881         type => 'string',
 882         optional => 1,
 883         enum => ['in', 'out', 'group'],
 884     },
 885     action => {
 886         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 887         type => 'string',
 888         optional => 1,
 889         pattern => $security_group_name_pattern,
 890         maxLength => 20,
 891         minLength => 2,
 892     },
 893     macro => {
 894         type => 'string',
 895         optional => 1,
 896         maxLength => 128,
 897     },
 898     iface => get_standard_option('pve-iface', { optional => 1 }),
 899     source => {
 900         type => 'string', format => 'pve-fw-v4addr-spec',
 901         optional => 1,
 902     },
 903     dest => {
 904         type => 'string', format => 'pve-fw-v4addr-spec',
 905         optional => 1,
 906     },
 907     proto => {
 908         type => 'string', format => 'pve-fw-protocol-spec',
 909         optional => 1,
 910     },
 911     enable => {
 912         type => 'boolean',
 913         optional => 1,
 914     },
 915     sport => {
 916         type => 'string', format => 'pve-fw-port-spec',
 917         optional => 1,
 918         requires => 'proto',
 919     },
 920     dport => {
 921         type => 'string', format => 'pve-fw-port-spec',
 922         optional => 1,
 923         requires => 'proto',
 924     },
 925     comment => {
 926         type => 'string',
 927         optional => 1,
 928     },
 929 };
 930
 931 sub add_rule_properties {
 932     my ($properties) = @_;
 933
 934     foreach my $k (keys %$rule_properties) {
 935         my $h = $rule_properties->{$k};
 936         # copy data, so that we can modify later without side effects
 937         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 938     }
 939
 940     return $properties;
 941 }
 942
 943 sub delete_rule_properties {
 944     my ($rule, $delete_str) = @_;
 945
 946     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 947         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 948             if !defined($rule_properties->{$opt});
 949         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 950             if $opt eq 'type' || $opt eq 'action';
 951         delete $rule->{$opt};
 952     }
 953
 954     return $rule;
 955 }
 956
 957 my $apply_macro = sub {
 958     my ($macro_name, $param, $verify) = @_;
 959
 960     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 961     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 962
 963     my $rules = [];
 964
 965     foreach my $templ (@$macro_rules) {
 966         my $rule = {};
 967         my $param_used = {};
 968         foreach my $k (keys %$templ) {
 969             my $v = $templ->{$k};
 970             if ($v eq 'PARAM') {
 971                 $v = $param->{$k};
 972                 $param_used->{$k} = 1;
 973             } elsif ($v eq 'DEST') {
 974                 $v = $param->{dest};
 975                 $param_used->{dest} = 1;
 976             } elsif ($v eq 'SOURCE') {
 977                 $v = $param->{source};
 978                 $param_used->{source} = 1;
 979             }
 980
 981             if (!defined($v)) {
 982                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 983                 raise_param_exc({ macro => $msg }) if $verify;
 984                 die "$msg\n";
 985             }
 986             $rule->{$k} = $v;
 987         }
 988         foreach my $k (keys %$param) {
 989             next if $k eq 'macro';
 990             next if !defined($param->{$k});
 991             next if $param_used->{$k};
 992             if (defined($rule->{$k})) {
 993                 if ($rule->{$k} ne $param->{$k}) {
 994                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 995                     raise_param_exc({ $k => $msg }) if $verify;
 996                     die "$msg\n";
 997                 }
 998             } else {
 999                 $rule->{$k} = $param->{$k};
1000             }
1001         }
1002         push @$rules, $rule;
1003     }
1004
1005     return $rules;
1006 };
1007
1008 sub verify_rule {
1009     my ($rule, $allow_groups) = @_;
1010
1011     my $type = $rule->{type};
1012
1013     raise_param_exc({ type => "missing property"}) if !$type;
1014     raise_param_exc({ action => "missing property"}) if !$rule->{action};
1015
1016     if ($type eq  'in' || $type eq 'out') {
1017         raise_param_exc({ action => "unknown action '$rule->{action}'"})
1018             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
1019     } elsif ($type eq 'group') {
1020         raise_param_exc({ type => "security groups not allowed"})
1021             if !$allow_groups;
1022         raise_param_exc({ action => "invalid characters in security group name"})
1023             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
1024     } else {
1025         raise_param_exc({ type => "unknown rule type '$type'"});
1026     }
1027
1028     if ($rule->{iface}) {
1029         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1030         raise_param_exc({ iface => $@ }) if $@;
1031     }
1032
1033     if ($rule->{macro}) {
1034         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1035         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1036         $rule->{macro} = $preferred_name;
1037     }
1038
1039     if ($rule->{dport}) {
1040         eval { parse_port_name_number_or_range($rule->{dport}); };
1041         raise_param_exc({ dport => $@ }) if $@;
1042     }
1043
1044     if ($rule->{sport}) {
1045         eval { parse_port_name_number_or_range($rule->{sport}); };
1046         raise_param_exc({ sport => $@ }) if $@;
1047     }
1048
1049     if ($rule->{source}) {
1050         eval { parse_address_list($rule->{source}); };
1051         raise_param_exc({ source => $@ }) if $@;
1052     }
1053
1054     if ($rule->{dest}) {
1055         eval { parse_address_list($rule->{dest}); };
1056         raise_param_exc({ dest => $@ }) if $@;
1057     }
1058
1059     if ($rule->{macro}) {
1060         &$apply_macro($rule->{macro}, $rule, 1);
1061     }
1062
1063     return $rule;
1064 }
1065
1066 sub copy_rule_data {
1067     my ($rule, $param) = @_;
1068
1069     foreach my $k (keys %$rule_properties) {
1070         if (defined(my $v = $param->{$k})) {
1071             if ($v eq '' || $v eq '-') {
1072                 delete $rule->{$k};
1073             } else {
1074                 $rule->{$k} = $v;
1075             }
1076         } else {
1077             delete $rule->{$k};
1078         }
1079     }
1080
1081     # verify rule now
1082
1083     return $rule;
1084 }
1085
1086 # core functions
1087 my $bridge_firewall_enabled = 0;
1088
1089 sub enable_bridge_firewall {
1090
1091     return if $bridge_firewall_enabled; # only once
1092
1093     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1094     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1095
1096     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1097     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1098
1099     $bridge_firewall_enabled = 1;
1100 }
1101
1102 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1103
1104 sub iptables_restore_cmdlist {
1105     my ($cmdlist) = @_;
1106
1107     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1108 }
1109
1110 sub ipset_restore_cmdlist {
1111     my ($cmdlist) = @_;
1112
1113     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1114 }
1115
1116 sub iptables_get_chains {
1117
1118     my $res = {};
1119
1120     # check what chains we want to track
1121     my $is_pvefw_chain = sub {
1122         my $name = shift;
1123
1124         return 1 if $name =~ m/^PVEFW-\S+$/;
1125
1126         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1127
1128         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1129
1130         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1131
1132         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1133         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1134
1135         return undef;
1136     };
1137
1138     my $table = '';
1139
1140     my $hooks = {};
1141
1142     my $parser = sub {
1143         my $line = shift;
1144
1145         return if $line =~ m/^#/;
1146         return if $line =~ m/^\s*$/;
1147
1148         if ($line =~ m/^\*(\S+)$/) {
1149             $table = $1;
1150             return;
1151         }
1152
1153         return if $table ne 'filter';
1154
1155         if ($line =~ m/^:(\S+)\s/) {
1156             my $chain = $1;
1157             return if !&$is_pvefw_chain($chain);
1158             $res->{$chain} = "unknown";
1159         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1160             my ($chain, $sig) = ($1, $2);
1161             return if !&$is_pvefw_chain($chain);
1162             $res->{$chain} = $sig;
1163         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1164             $hooks->{$1} = 1;
1165         } else {
1166             # simply ignore the rest
1167             return;
1168         }
1169     };
1170
1171     run_command("/sbin/iptables-save", outfunc => $parser);
1172
1173     return wantarray ? ($res, $hooks) : $res;
1174 }
1175
1176 sub iptables_chain_digest {
1177     my ($rules) = @_;
1178     my $digest = Digest::SHA->new('sha1');
1179     foreach my $rule (@$rules) { # order is important
1180         $digest->add($rule);
1181     }
1182     return $digest->b64digest;
1183 }
1184
1185 sub ipset_chain_digest {
1186     my ($rules) = @_;
1187
1188     my $digest = Digest::SHA->new('sha1');
1189     foreach my $rule (sort @$rules) { # note: sorted
1190         $digest->add($rule);
1191     }
1192     return $digest->b64digest;
1193 }
1194
1195 sub ipset_get_chains {
1196
1197     my $res = {};
1198     my $chains = {};
1199
1200     my $parser = sub {
1201         my $line = shift;
1202
1203         return if $line =~ m/^#/;
1204         return if $line =~ m/^\s*$/;
1205         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1206             my $chain = $1;
1207             $line =~ s/\s+$//; # delete trailing white space
1208             push @{$chains->{$chain}}, $line;
1209         } else {
1210             # simply ignore the rest
1211             return;
1212         }
1213     };
1214
1215     run_command("/usr/sbin/ipset save", outfunc => $parser);
1216
1217     # compute digest for each chain
1218     foreach my $chain (keys %$chains) {
1219         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1220     }
1221
1222     return $res;
1223 }
1224
1225 sub ruleset_generate_cmdstr {
1226     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1227
1228     return if defined($rule->{enable}) && !$rule->{enable};
1229
1230     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1231
1232     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1233     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1234
1235     my @cmd = ();
1236
1237     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1238     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1239
1240     my $source = $rule->{source};
1241     my $dest = $rule->{dest};
1242
1243     if ($source) {
1244         if ($source =~ m/^\+/) {
1245             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1246                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1247                 push @cmd, "-m set --match-set PVEFW-$1 src";
1248             } else {
1249                 die "invalid security group name '$source'\n";
1250             }
1251         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1252             my $alias = lc($source);
1253             my $e = $cluster_conf->{aliases}->{$alias};
1254             die "no such alias $source\n" if !$e;
1255             push @cmd, "-s $e->{cidr}";
1256         } elsif ($source =~ m/\-/){
1257             push @cmd, "-m iprange --src-range $source";
1258
1259         } else {
1260             push @cmd, "-s $source";
1261         }
1262     }
1263
1264     if ($dest) {
1265         if ($dest =~ m/^\+/) {
1266             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1267                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1268                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1269             } else {
1270                 die "invalid security group name '$dest'\n";
1271             }
1272         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1273             my $alias = lc($dest);
1274             my $e = $cluster_conf->{aliases}->{$alias};
1275             die "no such alias $dest" if !$e;
1276             push @cmd, "-d $e->{cidr}";
1277         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1278             push @cmd, "-m iprange --dst-range $dest";
1279
1280         } else {
1281             push @cmd, "-d $dest";
1282         }
1283     }
1284
1285     if ($rule->{proto}) {
1286         push @cmd, "-p $rule->{proto}";
1287
1288         my $multiport = 0;
1289         $multiport++ if $nbdport > 1;
1290         $multiport++ if $nbsport > 1;
1291
1292         push @cmd, "--match multiport" if $multiport;
1293
1294         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1295             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1296
1297         if ($rule->{dport}) {
1298             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1299                 # Note: we use dport to store --icmp-type
1300                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1301                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1302             } else {
1303                 if ($nbdport > 1) {
1304                     if ($multiport == 2) {
1305                         push @cmd,  "--ports $rule->{dport}";
1306                     } else {
1307                         push @cmd, "--dports $rule->{dport}";
1308                     }
1309                 } else {
1310                     push @cmd, "--dport $rule->{dport}";
1311                 }
1312             }
1313         }
1314
1315         if ($rule->{sport}) {
1316             if ($nbsport > 1) {
1317                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1318             } else {
1319                 push @cmd, "--sport $rule->{sport}";
1320             }
1321         }
1322     } elsif ($rule->{dport} || $rule->{sport}) {
1323         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1324         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1325     }
1326
1327     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1328
1329     if (my $action = $rule->{action}) {
1330         $action = $actions->{$action} if defined($actions->{$action});
1331         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1332         push @cmd, $goto ? "-g $action" : "-j $action";
1333     }
1334
1335     return scalar(@cmd) ? join(' ', @cmd) : undef;
1336 }
1337
1338 sub ruleset_generate_rule {
1339     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1340
1341     my $rules;
1342
1343     if ($rule->{macro}) {
1344         $rules = &$apply_macro($rule->{macro}, $rule);
1345     } else {
1346         $rules = [ $rule ];
1347     }
1348
1349     # update all or nothing
1350
1351     my @cmds = ();
1352     foreach my $tmp (@$rules) {
1353         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1354             push @cmds, $cmdstr;
1355         }
1356     }
1357
1358     foreach my $cmdstr (@cmds) {
1359         ruleset_addrule($ruleset, $chain, $cmdstr);
1360     }
1361 }
1362
1363 sub ruleset_generate_rule_insert {
1364     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1365
1366     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1367
1368     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1369         ruleset_insertrule($ruleset, $chain, $cmdstr);
1370     }
1371 }
1372
1373 sub ruleset_create_chain {
1374     my ($ruleset, $chain) = @_;
1375
1376     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1377     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1378
1379     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1380
1381     $ruleset->{$chain} = [];
1382 }
1383
1384 sub ruleset_chain_exist {
1385     my ($ruleset, $chain) = @_;
1386
1387     return $ruleset->{$chain} ? 1 : undef;
1388 }
1389
1390 sub ruleset_addrule {
1391    my ($ruleset, $chain, $rule) = @_;
1392
1393    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1394
1395    push @{$ruleset->{$chain}}, "-A $chain $rule";
1396 }
1397
1398 sub ruleset_insertrule {
1399    my ($ruleset, $chain, $rule) = @_;
1400
1401    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1402
1403    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1404 }
1405
1406 sub get_log_rule_base {
1407     my ($chain, $vmid, $msg, $loglevel) = @_;
1408
1409     die "internal error - no log level" if !defined($loglevel);
1410
1411     $vmid = 0 if !defined($vmid);
1412
1413     # Note: we use special format for prefix to pass further
1414     # info to log daemon (VMID, LOGVELEL and CHAIN)
1415
1416     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1417 }
1418
1419 sub ruleset_addlog {
1420     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1421
1422     return if !defined($loglevel);
1423
1424     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1425
1426     $logrule = "$rule $logrule" if defined($rule);
1427
1428     ruleset_addrule($ruleset, $chain, $logrule);
1429 }
1430
1431 sub ruleset_add_chain_policy {
1432     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1433
1434     if ($policy eq 'ACCEPT') {
1435
1436         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1437                               { ACCEPT =>  $accept_action});
1438
1439     } elsif ($policy eq 'DROP') {
1440
1441         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1442
1443         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1444
1445         ruleset_addrule($ruleset, $chain, "-j DROP");
1446     } elsif ($policy eq 'REJECT') {
1447         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1448
1449         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1450
1451         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1452     } else {
1453         # should not happen
1454         die "internal error: unknown policy '$policy'";
1455     }
1456 }
1457
1458 sub ruleset_chain_add_conn_filters {
1459     my ($ruleset, $chain, $accept) = @_;
1460
1461     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1462     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1463 }
1464
1465 sub ruleset_chain_add_input_filters {
1466     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1467
1468     if ($cluster_conf->{ipset}->{blacklist}){
1469         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1470         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1471     }
1472
1473     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1474         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1475     }
1476
1477     if ($options->{tcpflags}) {
1478         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1479     }
1480 }
1481
1482 sub ruleset_create_vm_chain {
1483     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1484
1485     ruleset_create_chain($ruleset, $chain);
1486     my $accept = generate_nfqueue($options);
1487
1488     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1489         if ($direction eq 'OUT') {
1490             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1491                                                       proto => 'udp', sport => 68, dport => 67 });
1492         } else {
1493             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1494                                                       proto => 'udp', sport => 67, dport => 68 });
1495         }
1496     }
1497
1498     if ($direction eq 'OUT') {
1499         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1500             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1501         }
1502         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1503     }
1504 }
1505
1506 sub ruleset_add_group_rule {
1507     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1508
1509     my $group = $rule->{action};
1510     my $group_chain = "GROUP-$group-$direction";
1511     if(!ruleset_chain_exist($ruleset, $group_chain)){
1512         generate_group_rules($ruleset, $cluster_conf, $group);
1513     }
1514
1515     if ($direction eq 'OUT' && $rule->{iface_out}) {
1516         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1517     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1518         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1519     } else {
1520         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1521     }
1522
1523     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1524 }
1525
1526 sub ruleset_generate_vm_rules {
1527     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1528
1529     my $lc_direction = lc($direction);
1530
1531     my $in_accept = generate_nfqueue($options);
1532
1533     foreach my $rule (@$rules) {
1534         next if $rule->{iface} && $rule->{iface} ne $netid;
1535         next if !$rule->{enable};
1536         if ($rule->{type} eq 'group') {
1537             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1538                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1539         } else {
1540             next if $rule->{type} ne $lc_direction;
1541             eval {
1542                 if ($direction eq 'OUT') {
1543                     ruleset_generate_rule($ruleset, $chain, $rule,
1544                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1545                                           undef, $cluster_conf);
1546                 } else {
1547                     ruleset_generate_rule($ruleset, $chain, $rule,
1548                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1549                                           undef, $cluster_conf);
1550                 }
1551             };
1552             warn $@ if $@;
1553         }
1554     }
1555 }
1556
1557 sub generate_nfqueue {
1558     my ($options) = @_;
1559
1560     if ($options->{ips}) {
1561         my $action = "NFQUEUE";
1562         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1563             if (defined($3) && defined($1)) {
1564                 $action .= " --queue-balance $1:$3";
1565             } elsif (defined($1)) {
1566                 $action .= " --queue-num $1";
1567             }
1568         }
1569         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1570         return $action;
1571     } else {
1572         return "ACCEPT";
1573     }
1574 }
1575
1576 sub ruleset_generate_vm_ipsrules {
1577     my ($ruleset, $options, $direction, $iface) = @_;
1578
1579     if ($options->{ips} && $direction eq 'IN') {
1580         my $nfqueue = generate_nfqueue($options);
1581
1582         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1583             ruleset_create_chain($ruleset, "PVEFW-IPS");
1584         }
1585
1586         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1587     }
1588 }
1589
1590 sub generate_venet_rules_direction {
1591     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1592
1593     my $lc_direction = lc($direction);
1594
1595     my $rules = $vmfw_conf->{rules};
1596
1597     my $options = $vmfw_conf->{options};
1598     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1599
1600     my $chain = "venet0-$vmid-$direction";
1601
1602     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1603
1604     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1605
1606     # implement policy
1607     my $policy;
1608
1609     if ($direction eq 'OUT') {
1610         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1611     } else {
1612         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1613     }
1614
1615     my $accept = generate_nfqueue($options);
1616     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1617     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1618
1619     if ($direction eq 'OUT') {
1620         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1621             action => $chain,
1622             source => $ip,
1623             iface_in => 'venet0'});
1624     } else {
1625         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1626             action => $chain,
1627             dest => $ip,
1628             iface_out => 'venet0'});
1629     }
1630 }
1631
1632 sub generate_tap_rules_direction {
1633     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1634
1635     my $lc_direction = lc($direction);
1636
1637     my $rules = $vmfw_conf->{rules};
1638
1639     my $options = $vmfw_conf->{options};
1640     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1641
1642     my $tapchain = "$iface-$direction";
1643
1644     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1645
1646     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1647
1648     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1649
1650     # implement policy
1651     my $policy;
1652
1653     if ($direction eq 'OUT') {
1654         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1655     } else {
1656         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1657     }
1658
1659     my $accept = generate_nfqueue($options);
1660     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1661     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1662
1663     # plug the tap chain to bridge chain
1664     if ($direction eq 'IN') {
1665         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1666                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1667     } else {
1668         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1669                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1670     }
1671 }
1672
1673 sub enable_host_firewall {
1674     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1675
1676     my $options = $hostfw_conf->{options};
1677     my $cluster_options = $cluster_conf->{options};
1678     my $rules = $hostfw_conf->{rules};
1679     my $cluster_rules = $cluster_conf->{rules};
1680
1681     # host inbound firewall
1682     my $chain = "PVEFW-HOST-IN";
1683     ruleset_create_chain($ruleset, $chain);
1684
1685     my $loglevel = get_option_log_level($options, "log_level_in");
1686
1687     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1688
1689     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1690     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1691
1692     # we use RETURN because we need to check also tap rules
1693     my $accept_action = 'RETURN';
1694
1695     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1696
1697     # add host rules first, so that cluster wide rules can be overwritten
1698     foreach my $rule (@$rules, @$cluster_rules) {
1699         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1700         eval {
1701             if ($rule->{type} eq 'group') {
1702                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1703             } elsif ($rule->{type} eq 'in') {
1704                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1705                                       undef, $cluster_conf);
1706             }
1707         };
1708         warn $@ if $@;
1709         delete $rule->{iface_in};
1710     }
1711
1712     # allow standard traffic for management ipset (includes cluster network)
1713     my $mngmntsrc = "-m set --match-set PVEFW-management src";
1714     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1715     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1716     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1717     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1718
1719     my $localnet = local_network();
1720
1721     # corosync
1722     if ($localnet) {
1723         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1724         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1725         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1726     }
1727
1728     # implement input policy
1729     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1730     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1731
1732     # host outbound firewall
1733     $chain = "PVEFW-HOST-OUT";
1734     ruleset_create_chain($ruleset, $chain);
1735
1736     $loglevel = get_option_log_level($options, "log_level_out");
1737
1738     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1739
1740     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1741
1742     # we use RETURN because we may want to check other thigs later
1743     $accept_action = 'RETURN';
1744
1745     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1746
1747     # add host rules first, so that cluster wide rules can be overwritten
1748     foreach my $rule (@$rules, @$cluster_rules) {
1749         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1750         eval {
1751             if ($rule->{type} eq 'group') {
1752                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1753             } elsif ($rule->{type} eq 'out') {
1754                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1755                                       undef, $cluster_conf);
1756             }
1757         };
1758         warn $@ if $@;
1759         delete $rule->{iface_out};
1760     }
1761
1762     # allow standard traffic on cluster network
1763     if ($localnet) {
1764         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1765         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1766         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1767         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1768
1769         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1770         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1771         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1772     }
1773
1774     # implement output policy
1775     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1776     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1777
1778     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1779     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1780 }
1781
1782 sub generate_group_rules {
1783     my ($ruleset, $cluster_conf, $group) = @_;
1784
1785     my $rules = $cluster_conf->{groups}->{$group};
1786
1787     if (!$rules) {
1788         warn "no such security group '$group'\n";
1789         $rules = []; # create empty chain
1790     }
1791
1792     my $chain = "GROUP-${group}-IN";
1793
1794     ruleset_create_chain($ruleset, $chain);
1795     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1796
1797     foreach my $rule (@$rules) {
1798         next if $rule->{type} ne 'in';
1799         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1800     }
1801
1802     $chain = "GROUP-${group}-OUT";
1803
1804     ruleset_create_chain($ruleset, $chain);
1805     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1806
1807     foreach my $rule (@$rules) {
1808         next if $rule->{type} ne 'out';
1809         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1810         # check also other tap rules later
1811         ruleset_generate_rule($ruleset, $chain, $rule,
1812                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1813     }
1814 }
1815
1816 my $MAX_NETS = 32;
1817 my $valid_netdev_names = {};
1818 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1819     $valid_netdev_names->{"net$i"} = 1;
1820 }
1821
1822 sub parse_fw_rule {
1823     my ($line, $allow_iface, $allow_groups) = @_;
1824
1825     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1826
1827     chomp $line;
1828
1829     # we can add single line comments to the end of the rule
1830     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1831
1832     # we can disable a rule when prefixed with '|'
1833     my $enable = 1;
1834
1835     $enable = 0 if $line =~ s/^\|//;
1836
1837     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1838         die "unable to parse rule: $line\n";
1839
1840     $type = lc($1);
1841     $action = $2;
1842
1843     if ($type eq  'in' || $type eq 'out') {
1844         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1845             # OK
1846         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1847             $action = $2;
1848             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1849             die "unknown macro '$1'\n" if !$preferred_name;
1850             $macro = $preferred_name;
1851         } else {
1852             die "unknown action '$action'\n";
1853         }
1854     } elsif ($type eq 'group') {
1855         die "groups disabled\n" if !$allow_groups;
1856         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1857     } else {
1858         die "unknown rule type '$type'\n";
1859     }
1860
1861     while (length($line)) {
1862         if ($line =~ s/^-i (\S+)\s*//) {
1863             die "parameter -i not allowed\n" if !$allow_iface;
1864             $iface = $1;
1865             PVE::JSONSchema::pve_verify_iface($iface);
1866             next;
1867         }
1868
1869         last if $type eq 'group';
1870
1871         if ($line =~ s/^-p (\S+)\s*//) {
1872             $proto = $1;
1873             pve_fw_verify_protocol_spec($proto);
1874             next;
1875         }
1876         if ($line =~ s/^-dport (\S+)\s*//) {
1877             $dport = $1;
1878             parse_port_name_number_or_range($dport);
1879             next;
1880         }
1881         if ($line =~ s/^-sport (\S+)\s*//) {
1882             $sport = $1;
1883             parse_port_name_number_or_range($sport);
1884             next;
1885         }
1886         if ($line =~ s/^-source (\S+)\s*//) {
1887             $source = $1;
1888             parse_address_list($source);
1889             next;
1890         }
1891         if ($line =~ s/^-dest (\S+)\s*//) {
1892             $dest = $1;
1893             parse_address_list($dest);
1894             next;
1895         }
1896
1897         last;
1898     }
1899
1900     die "unable to parse rule parameters: $line\n" if length($line);
1901
1902     return {
1903         type => $type,
1904         enable => $enable,
1905         comment => $comment,
1906         action => $action,
1907         macro => $macro,
1908         iface => $iface,
1909         source => $source,
1910         dest => $dest,
1911         proto => $proto,
1912         dport => $dport,
1913         sport => $sport,
1914     };
1915 }
1916
1917 sub parse_vmfw_option {
1918     my ($line) = @_;
1919
1920     my ($opt, $value);
1921
1922     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1923
1924     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1925         $opt = lc($1);
1926         $value = int($2);
1927     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1928         $opt = lc($1);
1929         $value = $2 ? lc($3) : '';
1930     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1931         $opt = lc($1);
1932         $value = uc($3);
1933     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1934         $opt = lc($1);
1935         $value = $2;
1936     } else {
1937         chomp $line;
1938         die "can't parse option '$line'\n"
1939     }
1940
1941     return ($opt, $value);
1942 }
1943
1944 sub parse_hostfw_option {
1945     my ($line) = @_;
1946
1947     my ($opt, $value);
1948
1949     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1950
1951     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1952         $opt = lc($1);
1953         $value = int($2);
1954     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1955         $opt = lc($1);
1956         $value = $2 ? lc($3) : '';
1957     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1958         $opt = lc($1);
1959         $value = int($2);
1960     } else {
1961         chomp $line;
1962         die "can't parse option '$line'\n"
1963     }
1964
1965     return ($opt, $value);
1966 }
1967
1968 sub parse_clusterfw_option {
1969     my ($line) = @_;
1970
1971     my ($opt, $value);
1972
1973     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1974         $opt = lc($1);
1975         $value = int($2);
1976     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1977         $opt = lc($1);
1978         $value = uc($3);
1979     } else {
1980         chomp $line;
1981         die "can't parse option '$line'\n"
1982     }
1983
1984     return ($opt, $value);
1985 }
1986
1987 sub parse_alias {
1988     my ($line) = @_;
1989
1990     # we can add single line comments to the end of the line
1991     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1992
1993     if ($line =~ m/^(\S+)\s(\S+)$/) {
1994         my ($name, $cidr) = ($1, $2);
1995         $cidr =~ s|/32$||;
1996         pve_verify_ipv4_or_cidr($cidr);
1997         my $data = {
1998             name => $name,
1999             cidr => $cidr,
2000         };
2001         $data->{comment} = $comment  if $comment;
2002         return $data;
2003     }
2004
2005     return undef;
2006 }
2007
2008 sub parse_vm_fw_rules {
2009     my ($filename, $fh) = @_;
2010
2011     my $res = {
2012         rules => [],
2013         options => {},
2014         aliases => {},
2015     };
2016
2017     my $section;
2018
2019     while (defined(my $line = <$fh>)) {
2020         next if $line =~ m/^#/;
2021         next if $line =~ m/^\s*$/;
2022
2023         my $linenr = $fh->input_line_number();
2024         my $prefix = "$filename (line $linenr)";
2025
2026         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2027             $section = lc($1);
2028             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2029             next;
2030         }
2031         if (!$section) {
2032             warn "$prefix: skip line - no section";
2033             next;
2034         }
2035
2036         next if !$res->{$section}; # skip undefined section
2037
2038         if ($section eq 'options') {
2039             eval {
2040                 my ($opt, $value) = parse_vmfw_option($line);
2041                 $res->{options}->{$opt} = $value;
2042             };
2043             warn "$prefix: $@" if $@;
2044             next;
2045         }
2046
2047         if ($section eq 'aliases') {
2048             eval {
2049                 my $data = parse_alias($line);
2050                 $res->{aliases}->{lc($data->{name})} = $data;
2051             };
2052             warn "$prefix: $@" if $@;
2053             next;
2054         }
2055
2056         my $rule;
2057         eval { $rule = parse_fw_rule($line, 1, 1); };
2058         if (my $err = $@) {
2059             warn "$prefix: $err";
2060             next;
2061         }
2062
2063         push @{$res->{$section}}, $rule;
2064     }
2065
2066     return $res;
2067 }
2068
2069 sub parse_host_fw_rules {
2070     my ($filename, $fh) = @_;
2071
2072     my $res = { rules => [], options => {}};
2073
2074     my $section;
2075
2076     while (defined(my $line = <$fh>)) {
2077         next if $line =~ m/^#/;
2078         next if $line =~ m/^\s*$/;
2079
2080         my $linenr = $fh->input_line_number();
2081         my $prefix = "$filename (line $linenr)";
2082
2083         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2084             $section = lc($1);
2085             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2086             next;
2087         }
2088         if (!$section) {
2089             warn "$prefix: skip line - no section";
2090             next;
2091         }
2092
2093         next if !$res->{$section}; # skip undefined section
2094
2095         if ($section eq 'options') {
2096             eval {
2097                 my ($opt, $value) = parse_hostfw_option($line);
2098                 $res->{options}->{$opt} = $value;
2099             };
2100             warn "$prefix: $@" if $@;
2101             next;
2102         }
2103
2104         my $rule;
2105         eval { $rule = parse_fw_rule($line, 1, 1); };
2106         if (my $err = $@) {
2107             warn "$prefix: $err";
2108             next;
2109         }
2110
2111         push @{$res->{$section}}, $rule;
2112     }
2113
2114     return $res;
2115 }
2116
2117 sub parse_cluster_fw_rules {
2118     my ($filename, $fh) = @_;
2119
2120     my $section;
2121     my $group;
2122
2123     my $res = {
2124         rules => [],
2125         options => {},
2126         aliases => {},
2127         groups => {},
2128         group_comments => {},
2129         ipset => {} ,
2130         ipset_comments => {},
2131     };
2132
2133     while (defined(my $line = <$fh>)) {
2134         next if $line =~ m/^#/;
2135         next if $line =~ m/^\s*$/;
2136
2137         my $linenr = $fh->input_line_number();
2138         my $prefix = "$filename (line $linenr)";
2139
2140         if ($line =~ m/^\[options\]$/i) {
2141             $section = 'options';
2142             next;
2143         }
2144
2145         if ($line =~ m/^\[aliases\]$/i) {
2146             $section = 'aliases';
2147             next;
2148         }
2149
2150         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2151             $section = 'groups';
2152             $group = lc($1);
2153             my $comment = $2;
2154             $res->{$section}->{$group} = [];
2155             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2156                 if $comment;
2157             next;
2158         }
2159
2160         if ($line =~ m/^\[rules\]$/i) {
2161             $section = 'rules';
2162             next;
2163         }
2164
2165         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2166             $section = 'ipset';
2167             $group = lc($1);
2168             my $comment = $2;
2169             $res->{$section}->{$group} = [];
2170             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2171                 if $comment;
2172             next;
2173         }
2174
2175         if (!$section) {
2176             warn "$prefix: skip line - no section\n";
2177             next;
2178         }
2179
2180         if ($section eq 'options') {
2181             eval {
2182                 my ($opt, $value) = parse_clusterfw_option($line);
2183                 $res->{options}->{$opt} = $value;
2184             };
2185             warn "$prefix: $@" if $@;
2186         } elsif ($section eq 'aliases') {
2187             eval {
2188                 my $data = parse_alias($line);
2189                 $res->{aliases}->{lc($data->{name})} = $data;
2190             };
2191             warn "$prefix: $@" if $@;
2192         } elsif ($section eq 'rules') {
2193             my $rule;
2194             eval { $rule = parse_fw_rule($line, 1, 1); };
2195             if (my $err = $@) {
2196                 warn "$prefix: $err";
2197                 next;
2198             }
2199             push @{$res->{$section}}, $rule;
2200         } elsif ($section eq 'groups') {
2201             my $rule;
2202             eval { $rule = parse_fw_rule($line, 0, 0); };
2203             if (my $err = $@) {
2204                 warn "$prefix: $err";
2205                 next;
2206             }
2207             push @{$res->{$section}->{$group}}, $rule;
2208         } elsif ($section eq 'ipset') {
2209             # we can add single line comments to the end of the rule
2210             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2211
2212             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2213             my $nomatch = $1;
2214             my $cidr = $2;
2215
2216             if($cidr !~ m/^${ip_alias_pattern}$/) {
2217                 $cidr =~ s|/32$||;
2218
2219                 eval { pve_verify_ipv4_or_cidr($cidr); };
2220                 if (my $err = $@) {
2221                     warn "$prefix: $cidr - $err";
2222                     next;
2223                 }
2224             }
2225
2226             my $entry = { cidr => $cidr };
2227             $entry->{nomatch} = 1 if $nomatch;
2228             $entry->{comment} = $comment if $comment;
2229
2230             push @{$res->{$section}->{$group}}, $entry;
2231         }
2232     }
2233
2234     return $res;
2235 }
2236
2237 sub run_locked {
2238     my ($code, @param) = @_;
2239
2240     my $timeout = 10;
2241
2242     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2243
2244     die $@ if $@;
2245
2246     return $res;
2247 }
2248
2249 sub read_local_vm_config {
2250
2251     my $openvz = {};
2252     my $qemu = {};
2253
2254     my $vmdata = { openvz => $openvz, qemu => $qemu };
2255
2256     my $vmlist = PVE::Cluster::get_vmlist();
2257     return $vmdata if !$vmlist || !$vmlist->{ids};
2258     my $ids = $vmlist->{ids};
2259
2260     foreach my $vmid (keys %$ids) {
2261         next if !$vmid; # skip VE0
2262         my $d = $ids->{$vmid};
2263         next if !$d->{node} || $d->{node} ne $nodename;
2264         next if !$d->{type};
2265         if ($d->{type} eq 'openvz') {
2266             if ($have_pve_manager) {
2267                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2268                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2269                     $openvz->{$vmid} = $conf;
2270                 }
2271             }
2272         } elsif ($d->{type} eq 'qemu') {
2273             if ($have_qemu_server) {
2274                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2275                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2276                     $qemu->{$vmid} = $conf;
2277                 }
2278             }
2279         }
2280     }
2281
2282     return $vmdata;
2283 };
2284
2285 sub load_vmfw_conf {
2286     my ($vmid, $dir) = @_;
2287
2288     my $vmfw_conf = {};
2289
2290     $dir = "/etc/pve/firewall" if !defined($dir);
2291
2292     my $filename = "$dir/$vmid.fw";
2293     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2294         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2295     }
2296
2297     return $vmfw_conf;
2298 }
2299
2300 my $format_rules = sub {
2301     my ($rules, $allow_iface) = @_;
2302
2303     my $raw = '';
2304
2305     foreach my $rule (@$rules) {
2306         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2307             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2308             $raw .= uc($rule->{type});
2309             if ($rule->{macro}) {
2310                 $raw .= " $rule->{macro}($rule->{action})";
2311             } else {
2312                 $raw .= " " . $rule->{action};
2313             }
2314             if ($allow_iface && $rule->{iface}) {
2315                 $raw .= " -i $rule->{iface}";
2316             }
2317
2318             if ($rule->{type} ne  'group')  {
2319                 $raw .= " -source $rule->{source}" if $rule->{source};
2320                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2321                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2322                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2323                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2324             }
2325
2326             $raw .= " # " . encode('utf8', $rule->{comment})
2327                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2328             $raw .= "\n";
2329         } else {
2330             die "unknown rule type '$rule->{type}'";
2331         }
2332     }
2333
2334     return $raw;
2335 };
2336
2337 my $format_options = sub {
2338     my ($options) = @_;
2339
2340     my $raw = '';
2341
2342     $raw .= "[OPTIONS]\n\n";
2343     foreach my $opt (keys %$options) {
2344         $raw .= "$opt: $options->{$opt}\n";
2345     }
2346     $raw .= "\n";
2347
2348     return $raw;
2349 };
2350
2351 my $format_aliases = sub {
2352     my ($aliases) = @_;
2353
2354     my $raw = '';
2355
2356     $raw .= "[ALIASES]\n\n";
2357     foreach my $k (keys %$aliases) {
2358         my $e = $aliases->{$k};
2359         $raw .= "$e->{name} $e->{cidr}";
2360         $raw .= " # " . encode('utf8', $e->{comment})
2361             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2362         $raw .= "\n";
2363     }
2364     $raw .= "\n";
2365
2366     return $raw;
2367 };
2368
2369 my $format_ipset = sub {
2370     my ($options) = @_;
2371
2372     my $raw = '';
2373
2374     my $nethash = {};
2375     foreach my $entry (@$options) {
2376         $nethash->{$entry->{cidr}} = $entry;
2377     }
2378
2379     foreach my $cidr (sort keys %$nethash) {
2380         my $entry = $nethash->{$cidr};
2381         my $line = $entry->{nomatch} ? '!' : '';
2382         $line .= $entry->{cidr};
2383         $line .= " # " . encode('utf8', $entry->{comment})
2384             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2385         $raw .= "$line\n";
2386     }
2387
2388     return $raw;
2389 };
2390
2391 sub save_vmfw_conf {
2392     my ($vmid, $vmfw_conf) = @_;
2393
2394     my $raw = '';
2395
2396     my $options = $vmfw_conf->{options};
2397     $raw .= &$format_options($options) if scalar(keys %$options);
2398
2399     my $aliases = $vmfw_conf->{aliases};
2400     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2401
2402     my $rules = $vmfw_conf->{rules} || [];
2403     if (scalar(@$rules)) {
2404         $raw .= "[RULES]\n\n";
2405         $raw .= &$format_rules($rules, 1);
2406         $raw .= "\n";
2407     }
2408
2409     my $filename = "/etc/pve/firewall/$vmid.fw";
2410     PVE::Tools::file_set_contents($filename, $raw);
2411 }
2412
2413 sub read_vm_firewall_configs {
2414     my ($vmdata, $dir) = @_;
2415
2416     my $vmfw_configs = {};
2417
2418     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2419         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2420         next if !$vmfw_conf->{options}; # skip if file does not exists
2421         $vmfw_configs->{$vmid} = $vmfw_conf;
2422     }
2423
2424     return $vmfw_configs;
2425 }
2426
2427 sub get_option_log_level {
2428     my ($options, $k) = @_;
2429
2430     my $v = $options->{$k};
2431     $v = $default_log_level if !defined($v);
2432
2433     return undef if $v eq '' || $v eq 'nolog';
2434
2435     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2436
2437     return $v if ($v >= 0) && ($v <= 7);
2438
2439     warn "unknown log level ($k = '$v')\n";
2440
2441     return undef;
2442 }
2443
2444 sub generate_std_chains {
2445     my ($ruleset, $options) = @_;
2446
2447     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2448
2449     # same as shorewall smurflog.
2450     my $chain = 'PVEFW-smurflog';
2451     $pve_std_chains->{$chain} = [];
2452
2453     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2454     push @{$pve_std_chains->{$chain}}, "-j DROP";
2455
2456     # same as shorewall logflags action.
2457     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2458     $chain = 'PVEFW-logflags';
2459     $pve_std_chains->{$chain} = [];
2460
2461     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2462     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2463     push @{$pve_std_chains->{$chain}}, "-j DROP";
2464
2465     foreach my $chain (keys %$pve_std_chains) {
2466         ruleset_create_chain($ruleset, $chain);
2467         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2468             if (ref($rule)) {
2469                 ruleset_generate_rule($ruleset, $chain, $rule);
2470             } else {
2471                 ruleset_addrule($ruleset, $chain, $rule);
2472             }
2473         }
2474     }
2475 }
2476
2477 sub generate_ipset_chains {
2478     my ($ipset_ruleset, $fw_conf) = @_;
2479
2480     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2481         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2482     }
2483 }
2484
2485 sub generate_ipset {
2486     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2487
2488     my $hashsize = scalar(@$options);
2489     if ($hashsize <= 64) {
2490         $hashsize = 64;
2491     } else {
2492         $hashsize = round_powerof2($hashsize);
2493     }
2494
2495     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2496
2497     # remove duplicates
2498     my $nethash = {};
2499     foreach my $entry (@$options) {
2500         my $cidr = $entry->{cidr};
2501         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2502             my $alias = lc($cidr);
2503             if ($aliases->{$alias}) {
2504                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2505                 $nethash->{$entry->{cidr}} = $entry;
2506             } else {
2507                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2508             }
2509         } else {
2510             $nethash->{$entry->{cidr}} = $entry;
2511         }
2512     }
2513
2514     foreach my $cidr (sort keys %$nethash) {
2515         my $entry = $nethash->{$cidr};
2516
2517         my $cmd = "add $name $cidr";
2518         if ($entry->{nomatch}) {
2519             if ($feature_ipset_nomatch) {
2520                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2521             } else {
2522                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2523             }
2524         } else {
2525             push @{$ipset_ruleset->{$name}}, $cmd;
2526         }
2527     }
2528 }
2529
2530 sub round_powerof2 {
2531     my ($int) = @_;
2532
2533     $int--;
2534     $int |= $int >> $_ foreach (1,2,4,8,16);
2535     return ++$int;
2536 }
2537
2538 sub load_clusterfw_conf {
2539     my ($filename) = @_;
2540
2541     $filename = $clusterfw_conf_filename if !defined($filename);
2542
2543     my $cluster_conf = {};
2544     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2545         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2546     }
2547
2548     return $cluster_conf;
2549 }
2550
2551 sub save_clusterfw_conf {
2552     my ($cluster_conf) = @_;
2553
2554     my $raw = '';
2555
2556     my $options = $cluster_conf->{options};
2557     $raw .= &$format_options($options) if scalar(keys %$options);
2558
2559     my $aliases = $cluster_conf->{aliases};
2560     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2561
2562     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2563         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2564             my $utf8comment = encode('utf8', $comment);
2565             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2566         } else {
2567             $raw .= "[IPSET $ipset]\n\n";
2568         }
2569         my $options = $cluster_conf->{ipset}->{$ipset};
2570         $raw .= &$format_ipset($options);
2571         $raw .= "\n";
2572     }
2573
2574     my $rules = $cluster_conf->{rules};
2575     if (scalar(@$rules)) {
2576         $raw .= "[RULES]\n\n";
2577         $raw .= &$format_rules($rules, 1);
2578         $raw .= "\n";
2579     }
2580
2581     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2582         my $rules = $cluster_conf->{groups}->{$group};
2583         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2584             my $utf8comment = encode('utf8', $comment);
2585             $raw .= "[group $group] # $utf8comment\n\n";
2586         } else {
2587             $raw .= "[group $group]\n\n";
2588         }
2589
2590         $raw .= &$format_rules($rules, 0);
2591         $raw .= "\n";
2592     }
2593
2594     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2595 }
2596
2597 sub load_hostfw_conf {
2598     my ($filename) = @_;
2599
2600     $filename = $hostfw_conf_filename if !defined($filename);
2601
2602     my $hostfw_conf = {};
2603     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2604         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2605     }
2606     return $hostfw_conf;
2607 }
2608
2609 sub save_hostfw_conf {
2610     my ($hostfw_conf) = @_;
2611
2612     my $raw = '';
2613
2614     my $options = $hostfw_conf->{options};
2615     $raw .= &$format_options($options) if scalar(keys %$options);
2616
2617     my $rules = $hostfw_conf->{rules};
2618     if (scalar(@$rules)) {
2619         $raw .= "[RULES]\n\n";
2620         $raw .= &$format_rules($rules, 1);
2621         $raw .= "\n";
2622     }
2623
2624     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2625 }
2626
2627 sub compile {
2628     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2629
2630     my $vmfw_configs;
2631
2632     if ($vmdata) { # test mode
2633         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2634         my $filename = "$testdir/cluster.fw";
2635         $cluster_conf = load_clusterfw_conf($filename);
2636
2637         $filename = "$testdir/host.fw";
2638         $hostfw_conf = load_hostfw_conf($filename);
2639
2640         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2641     } else { # normal operation
2642         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2643
2644         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2645
2646         $vmdata = read_local_vm_config();
2647         $vmfw_configs = read_vm_firewall_configs($vmdata);
2648     }
2649
2650
2651     $cluster_conf->{ipset}->{venet0} = [];
2652
2653     my $localnet;
2654     if ($cluster_conf->{aliases}->{local_network}) {
2655         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2656     } else {
2657         $localnet = local_network() || '127.0.0.0/8';
2658         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2659     }
2660
2661     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2662
2663     my $ruleset = {};
2664
2665     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2666     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2667
2668     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2669
2670     my $hostfw_options = $hostfw_conf->{options} || {};
2671
2672     # fixme: what log level should we use here?
2673     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2674
2675     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2676
2677     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2678     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2679     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2680
2681     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2682     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2683
2684     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2685
2686     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2687     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2688
2689     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2690     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2691
2692     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2693
2694     generate_std_chains($ruleset, $hostfw_options);
2695
2696     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2697
2698     if ($hostfw_enable) {
2699         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2700         warn $@ if $@; # just to be sure - should not happen
2701     }
2702
2703     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2704
2705     # generate firewall rules for QEMU VMs
2706     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2707         eval {
2708             my $conf = $vmdata->{qemu}->{$vmid};
2709             my $vmfw_conf = $vmfw_configs->{$vmid};
2710             return if !$vmfw_conf;
2711             return if !$vmfw_conf->{options}->{enable};
2712
2713             foreach my $netid (keys %$conf) {
2714                 next if $netid !~ m/^net(\d+)$/;
2715                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2716                 next if !$net->{firewall};
2717                 my $iface = "tap${vmid}i$1";
2718
2719                 my $macaddr = $net->{macaddr};
2720                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2721                                              $vmfw_conf, $vmid, 'IN');
2722                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2723                                              $vmfw_conf, $vmid, 'OUT');
2724             }
2725         };
2726         warn $@ if $@; # just to be sure - should not happen
2727     }
2728
2729     # generate firewall rules for OpenVZ containers
2730     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2731         eval {
2732             my $conf = $vmdata->{openvz}->{$vmid};
2733
2734             my $vmfw_conf = $vmfw_configs->{$vmid};
2735             return if !$vmfw_conf;
2736             return if !$vmfw_conf->{options}->{enable};
2737
2738             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2739                 my $ip = $conf->{ip_address}->{value};
2740                 $ip =~ s/\s+/,/g;
2741                 parse_address_list($ip); # make sure we have a valid $ip list
2742
2743                 my @ips = split(',', $ip);
2744
2745                 foreach my $singleip (@ips) {
2746                     my $venet0ipset = {};
2747                     $venet0ipset->{cidr} = $singleip;
2748                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2749                 }
2750
2751                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2752                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2753             }
2754
2755             if ($conf->{netif} && $conf->{netif}->{value}) {
2756                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2757                 foreach my $netid (keys %$netif) {
2758                     my $d = $netif->{$netid};
2759
2760                     my $macaddr = $d->{mac};
2761                     my $iface = $d->{host_ifname};
2762                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2763                                                  $vmfw_conf, $vmid, 'IN');
2764                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2765                                                  $vmfw_conf, $vmid, 'OUT');
2766                 }
2767             }
2768         };
2769         warn $@ if $@; # just to be sure - should not happen
2770     }
2771
2772     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2773         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2774     }
2775
2776     my $ipset_ruleset = {};
2777     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2778
2779     return ($ruleset, $ipset_ruleset);
2780 }
2781
2782 sub get_ruleset_status {
2783     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2784
2785     my $statushash = {};
2786
2787     foreach my $chain (sort keys %$ruleset) {
2788         my $sig = &$digest_fn($ruleset->{$chain});
2789
2790         $statushash->{$chain}->{sig} = $sig;
2791
2792         my $oldsig = $active_chains->{$chain};
2793         if (!defined($oldsig)) {
2794             $statushash->{$chain}->{action} = 'create';
2795         } else {
2796             if ($oldsig eq $sig) {
2797                 $statushash->{$chain}->{action} = 'exists';
2798             } else {
2799                 $statushash->{$chain}->{action} = 'update';
2800             }
2801         }
2802         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2803         foreach my $cmd (@{$ruleset->{$chain}}) {
2804             print "\t$cmd\n" if $verbose;
2805         }
2806     }
2807
2808     foreach my $chain (sort keys %$active_chains) {
2809         if (!defined($ruleset->{$chain})) {
2810             my $sig = $active_chains->{$chain};
2811             $statushash->{$chain}->{action} = 'delete';
2812             $statushash->{$chain}->{sig} = $sig;
2813             print "delete $chain ($sig)\n" if $verbose;
2814         }
2815     }
2816
2817     return $statushash;
2818 }
2819
2820 sub print_sig_rule {
2821     my ($chain, $sig) = @_;
2822
2823     # We just use this to store a SHA1 checksum used to detect changes
2824     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2825 }
2826
2827 sub get_ruleset_cmdlist {
2828     my ($ruleset, $verbose) = @_;
2829
2830     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2831
2832     my ($active_chains, $hooks) = iptables_get_chains();
2833     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2834
2835     # create missing chains first
2836     foreach my $chain (sort keys %$ruleset) {
2837         my $stat = $statushash->{$chain};
2838         die "internal error" if !$stat;
2839         next if $stat->{action} ne 'create';
2840
2841         $cmdlist .= ":$chain - [0:0]\n";
2842     }
2843
2844     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2845         if (!$hooks->{$h}) {
2846             $cmdlist .= "-A $h -j PVEFW-$h\n";
2847         }
2848     }
2849
2850     foreach my $chain (sort keys %$ruleset) {
2851         my $stat = $statushash->{$chain};
2852         die "internal error" if !$stat;
2853
2854         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2855             $cmdlist .= "-F $chain\n";
2856             foreach my $cmd (@{$ruleset->{$chain}}) {
2857                 $cmdlist .= "$cmd\n";
2858             }
2859             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2860         } elsif ($stat->{action} eq 'delete') {
2861             die "internal error"; # this should not happen
2862         } elsif ($stat->{action} eq 'exists') {
2863             # do nothing
2864         } else {
2865             die "internal error - unknown status '$stat->{action}'";
2866         }
2867     }
2868
2869     foreach my $chain (keys %$statushash) {
2870         next if $statushash->{$chain}->{action} ne 'delete';
2871         $cmdlist .= "-F $chain\n";
2872     }
2873     foreach my $chain (keys %$statushash) {
2874         next if $statushash->{$chain}->{action} ne 'delete';
2875         next if $chain eq 'PVEFW-INPUT';
2876         next if $chain eq 'PVEFW-OUTPUT';
2877         next if $chain eq 'PVEFW-FORWARD';
2878         $cmdlist .= "-X $chain\n";
2879     }
2880
2881     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2882
2883     $cmdlist .= "COMMIT\n";
2884
2885     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2886 }
2887
2888 sub get_ipset_cmdlist {
2889     my ($ruleset, $verbose) = @_;
2890
2891     my $cmdlist = "";
2892
2893     my $delete_cmdlist = "";
2894
2895     my $active_chains = ipset_get_chains();
2896     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2897
2898     # remove stale _swap chains
2899     foreach my $chain (keys %$active_chains) {
2900         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2901             $cmdlist .= "destroy $chain\n";
2902         }
2903     }
2904
2905     foreach my $chain (sort keys %$ruleset) {
2906         my $stat = $statushash->{$chain};
2907         die "internal error" if !$stat;
2908
2909         if ($stat->{action} eq 'create') {
2910             foreach my $cmd (@{$ruleset->{$chain}}) {
2911                 $cmdlist .= "$cmd\n";
2912             }
2913         }
2914
2915         if ($stat->{action} eq 'update') {
2916             my $chain_swap = $chain."_swap";
2917
2918             foreach my $cmd (@{$ruleset->{$chain}}) {
2919                 $cmd =~ s/$chain/$chain_swap/;
2920                 $cmdlist .= "$cmd\n";
2921             }
2922             $cmdlist .= "swap $chain_swap $chain\n";
2923             $cmdlist .= "flush $chain_swap\n";
2924             $cmdlist .= "destroy $chain_swap\n";
2925         }
2926
2927     }
2928
2929     foreach my $chain (keys %$statushash) {
2930         next if $statushash->{$chain}->{action} ne 'delete';
2931
2932         $delete_cmdlist .= "flush $chain\n";
2933         $delete_cmdlist .= "destroy $chain\n";
2934     }
2935
2936     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2937
2938     return ($cmdlist, $delete_cmdlist, $changes);
2939 }
2940
2941 sub apply_ruleset {
2942     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2943
2944     enable_bridge_firewall();
2945
2946     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2947         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2948
2949     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2950
2951     if ($verbose) {
2952         if ($ipset_changes) {
2953             print "ipset changes:\n";
2954             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2955             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2956         }
2957
2958         if ($changes) {
2959             print "iptables changes:\n";
2960             print $cmdlist;
2961         }
2962     }
2963
2964     ipset_restore_cmdlist($ipset_create_cmdlist);
2965
2966     iptables_restore_cmdlist($cmdlist);
2967
2968     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2969
2970     # test: re-read status and check if everything is up to date
2971     my $active_chains = iptables_get_chains();
2972     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2973
2974     my $errors;
2975     foreach my $chain (sort keys %$ruleset) {
2976         my $stat = $statushash->{$chain};
2977         if ($stat->{action} ne 'exists') {
2978             warn "unable to update chain '$chain'\n";
2979             $errors = 1;
2980         }
2981     }
2982
2983     die "unable to apply firewall changes\n" if $errors;
2984
2985     update_nf_conntrack_max($hostfw_conf);
2986
2987     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2988
2989 }
2990
2991 sub update_nf_conntrack_max {
2992     my ($hostfw_conf) = @_;
2993
2994     my $max = 65536; # reasonable default
2995
2996     my $options = $hostfw_conf->{options} || {};
2997
2998     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2999         $max = $options->{nf_conntrack_max};
3000         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3001     }
3002
3003     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3004     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3005
3006     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3007
3008     if ($current != $max) {
3009         my $hashsize = int($max/4);
3010         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3011         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3012     }
3013 }
3014
3015 sub update_nf_conntrack_tcp_timeout_established {
3016     my ($hostfw_conf) = @_;
3017
3018     my $options = $hostfw_conf->{options} || {};
3019
3020     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3021
3022     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3023 }
3024
3025 sub remove_pvefw_chains {
3026
3027     my ($chash, $hooks) = iptables_get_chains();
3028     my $cmdlist = "*filter\n";
3029
3030     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3031         if ($hooks->{$h}) {
3032             $cmdlist .= "-D $h -j PVEFW-$h\n";
3033         }
3034     }
3035
3036     foreach my $chain (keys %$chash) {
3037         $cmdlist .= "-F $chain\n";
3038     }
3039
3040     foreach my $chain (keys %$chash) {
3041         $cmdlist .= "-X $chain\n";
3042     }
3043     $cmdlist .= "COMMIT\n";
3044
3045     iptables_restore_cmdlist($cmdlist);
3046 }
3047
3048 sub init {
3049     my $cluster_conf = load_clusterfw_conf();
3050     my $cluster_options = $cluster_conf->{options};
3051     my $enable = $cluster_options->{enable};
3052
3053     return if !$enable;
3054
3055     # load required modules here
3056 }
3057
3058 sub update {
3059     my ($verbose) = @_;
3060
3061     my $code = sub {
3062
3063         my $cluster_conf = load_clusterfw_conf();
3064         my $cluster_options = $cluster_conf->{options};
3065
3066         my $enable = $cluster_options->{enable};
3067
3068         die "Firewall is disabled - cannot start\n" if !$enable;
3069
3070         if (!$enable) {
3071             PVE::Firewall::remove_pvefw_chains();
3072             print "Firewall disabled\n" if $verbose;
3073             return;
3074         }
3075
3076         my $hostfw_conf = load_hostfw_conf();
3077
3078         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3079
3080         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
3081     };
3082
3083     run_locked($code);
3084 }
3085
3086 1;