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 = 'info';
 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 - 9",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 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 $etc_protocols;
 688 }
 689
 690 sub parse_address_list {
 691     my ($str) = @_;
 692
 693     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 694     return if $str =~ m/^${ip_alias_pattern}$/;
 695
 696     my $count = 0;
 697     my $iprange = 0;
 698     foreach my $elem (split(/,/, $str)) {
 699         $count++;
 700         if (!Net::IP->new($elem)) {
 701             my $err = Net::IP::Error();
 702             die "invalid IP address: $err\n";
 703         }
 704         $iprange = 1 if $elem =~ m/-/;
 705     }
 706
 707     die "you can use a range in a list\n" if $iprange && $count > 1;
 708 }
 709
 710 sub parse_port_name_number_or_range {
 711     my ($str) = @_;
 712
 713     my $services = PVE::Firewall::get_etc_services();
 714     my $count = 0;
 715     my $icmp_port = 0;
 716
 717     foreach my $item (split(/,/, $str)) {
 718         $count++;
 719         if ($item =~ m/^(\d+):(\d+)$/) {
 720             my ($port1, $port2) = ($1, $2);
 721             die "invalid port '$port1'\n" if $port1 > 65535;
 722             die "invalid port '$port2'\n" if $port2 > 65535;
 723         } elsif ($item =~ m/^(\d+)$/) {
 724             my $port = $1;
 725             die "invalid port '$port'\n" if $port > 65535;
 726         } else {
 727             if ($icmp_type_names->{$item}) {
 728                 $icmp_port = 1;
 729             } else {
 730                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 731             }
 732         }
 733     }
 734
 735     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 736
 737     return $count;
 738 }
 739
 740 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 741 sub pve_fw_verify_port_spec {
 742    my ($portstr) = @_;
 743
 744    parse_port_name_number_or_range($portstr);
 745
 746    return $portstr;
 747 }
 748
 749 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 750 sub pve_fw_verify_v4addr_spec {
 751    my ($list) = @_;
 752
 753    parse_address_list($list);
 754
 755    return $list;
 756 }
 757
 758 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 759 sub pve_fw_verify_protocol_spec {
 760    my ($proto) = @_;
 761
 762    my $protocols = get_etc_protocols();
 763
 764    die "unknown protocol '$proto'\n" if $proto &&
 765        !(defined($protocols->{byname}->{$proto}) ||
 766          defined($protocols->{byid}->{$proto}));
 767
 768    return $proto;
 769 }
 770
 771
 772 # helper function for API
 773
 774 sub copy_opject_with_digest {
 775     my ($object) = @_;
 776
 777     my $sha = Digest::SHA->new('sha1');
 778
 779     my $res = {};
 780     foreach my $k (sort keys %$object) {
 781         my $v = $object->{$k};
 782         next if !defined($v);
 783         $res->{$k} = $v;
 784         $sha->add($k, ':', $v, "\n");
 785     }
 786
 787     my $digest = $sha->hexdigest;
 788
 789     $res->{digest} = $digest;
 790
 791     return wantarray ? ($res, $digest) : $res;
 792 }
 793
 794 sub copy_list_with_digest {
 795     my ($list) = @_;
 796
 797     my $sha = Digest::SHA->new('sha1');
 798
 799     my $res = [];
 800     foreach my $entry (@$list) {
 801         my $data = {};
 802         foreach my $k (sort keys %$entry) {
 803             my $v = $entry->{$k};
 804             next if !defined($v);
 805             $data->{$k} = $v;
 806             $sha->add($k, ':', $v, "\n");
 807         }
 808         push @$res, $data;
 809     }
 810
 811     my $digest = $sha->hexdigest;
 812
 813     foreach my $entry (@$res) {
 814         $entry->{digest} = $digest;
 815     }
 816
 817     return wantarray ? ($res, $digest) : $res;
 818 }
 819
 820 my $rule_properties = {
 821     pos => {
 822         description => "Update rule at position <pos>.",
 823         type => 'integer',
 824         minimum => 0,
 825         optional => 1,
 826     },
 827     digest => get_standard_option('pve-config-digest'),
 828     type => {
 829         type => 'string',
 830         optional => 1,
 831         enum => ['in', 'out', 'group'],
 832     },
 833     action => {
 834         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 835         type => 'string',
 836         optional => 1,
 837         pattern => $security_group_name_pattern,
 838         maxLength => 20,
 839         minLength => 2,
 840     },
 841     macro => {
 842         type => 'string',
 843         optional => 1,
 844         maxLength => 128,
 845     },
 846     iface => get_standard_option('pve-iface', { optional => 1 }),
 847     source => {
 848         type => 'string', format => 'pve-fw-v4addr-spec',
 849         optional => 1,
 850     },
 851     dest => {
 852         type => 'string', format => 'pve-fw-v4addr-spec',
 853         optional => 1,
 854     },
 855     proto => {
 856         type => 'string', format => 'pve-fw-protocol-spec',
 857         optional => 1,
 858     },
 859     enable => {
 860         type => 'boolean',
 861         optional => 1,
 862     },
 863     sport => {
 864         type => 'string', format => 'pve-fw-port-spec',
 865         optional => 1,
 866     },
 867     dport => {
 868         type => 'string', format => 'pve-fw-port-spec',
 869         optional => 1,
 870     },
 871     comment => {
 872         type => 'string',
 873         optional => 1,
 874     },
 875 };
 876
 877 sub add_rule_properties {
 878     my ($properties) = @_;
 879
 880     foreach my $k (keys %$rule_properties) {
 881         my $h = $rule_properties->{$k};
 882         # copy data, so that we can modify later without side effects
 883         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 884     }
 885
 886     return $properties;
 887 }
 888
 889 sub delete_rule_properties {
 890     my ($rule, $delete_str) = @_;
 891
 892     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 893         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 894             if !defined($rule_properties->{$opt});
 895         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 896             if $opt eq 'type' || $opt eq 'action';
 897         delete $rule->{$opt};
 898     }
 899
 900     return $rule;
 901 }
 902
 903 my $apply_macro = sub {
 904     my ($macro_name, $param, $verify) = @_;
 905
 906     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 907     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 908
 909     my $rules = [];
 910
 911     foreach my $templ (@$macro_rules) {
 912         my $rule = {};
 913         my $param_used = {};
 914         foreach my $k (keys %$templ) {
 915             my $v = $templ->{$k};
 916             if ($v eq 'PARAM') {
 917                 $v = $param->{$k};
 918                 $param_used->{$k} = 1;
 919             } elsif ($v eq 'DEST') {
 920                 $v = $param->{dest};
 921                 $param_used->{dest} = 1;
 922             } elsif ($v eq 'SOURCE') {
 923                 $v = $param->{source};
 924                 $param_used->{source} = 1;
 925             }
 926
 927             if (!defined($v)) {
 928                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 929                 raise_param_exc({ macro => $msg }) if $verify;
 930                 die "$msg\n";
 931             }
 932             $rule->{$k} = $v;
 933         }
 934         foreach my $k (keys %$param) {
 935             next if $k eq 'macro';
 936             next if !defined($param->{$k});
 937             next if $param_used->{$k};
 938             if (defined($rule->{$k})) {
 939                 if ($rule->{$k} ne $param->{$k}) {
 940                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 941                     raise_param_exc({ $k => $msg }) if $verify;
 942                     die "$msg\n";
 943                 }
 944             } else {
 945                 $rule->{$k} = $param->{$k};
 946             }
 947         }
 948         push @$rules, $rule;
 949     }
 950
 951     return $rules;
 952 };
 953
 954 sub verify_rule {
 955     my ($rule, $allow_groups) = @_;
 956
 957     my $type = $rule->{type};
 958
 959     raise_param_exc({ type => "missing property"}) if !$type;
 960     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 961
 962     if ($type eq  'in' || $type eq 'out') {
 963         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 964             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 965     } elsif ($type eq 'group') {
 966         raise_param_exc({ type => "security groups not allowed"})
 967             if !$allow_groups;
 968         raise_param_exc({ action => "invalid characters in security group name"})
 969             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
 970     } else {
 971         raise_param_exc({ type => "unknown rule type '$type'"});
 972     }
 973
 974     if ($rule->{iface}) {
 975         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
 976         raise_param_exc({ iface => $@ }) if $@;
 977     }
 978
 979     if ($rule->{macro}) {
 980         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 981         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 982         $rule->{macro} = $preferred_name;
 983     }
 984
 985     if ($rule->{dport}) {
 986         eval { parse_port_name_number_or_range($rule->{dport}); };
 987         raise_param_exc({ dport => $@ }) if $@;
 988     }
 989
 990     if ($rule->{sport}) {
 991         eval { parse_port_name_number_or_range($rule->{sport}); };
 992         raise_param_exc({ sport => $@ }) if $@;
 993     }
 994
 995     if ($rule->{source}) {
 996         eval { parse_address_list($rule->{source}); };
 997         raise_param_exc({ source => $@ }) if $@;
 998     }
 999
1000     if ($rule->{dest}) {
1001         eval { parse_address_list($rule->{dest}); };
1002         raise_param_exc({ dest => $@ }) if $@;
1003     }
1004
1005     if ($rule->{macro}) {
1006         &$apply_macro($rule->{macro}, $rule, 1);
1007     }
1008
1009     return $rule;
1010 }
1011
1012 sub copy_rule_data {
1013     my ($rule, $param) = @_;
1014
1015     foreach my $k (keys %$rule_properties) {
1016         if (defined(my $v = $param->{$k})) {
1017             if ($v eq '' || $v eq '-') {
1018                 delete $rule->{$k};
1019             } else {
1020                 $rule->{$k} = $v;
1021             }
1022         } else {
1023             delete $rule->{$k};
1024         }
1025     }
1026
1027     # verify rule now
1028
1029     return $rule;
1030 }
1031
1032 # core functions
1033 my $bridge_firewall_enabled = 0;
1034
1035 sub enable_bridge_firewall {
1036
1037     return if $bridge_firewall_enabled; # only once
1038
1039     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1040     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1041
1042     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1043     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1044
1045     $bridge_firewall_enabled = 1;
1046 }
1047
1048 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1049
1050 sub iptables_restore_cmdlist {
1051     my ($cmdlist) = @_;
1052
1053     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1054 }
1055
1056 sub ipset_restore_cmdlist {
1057     my ($cmdlist) = @_;
1058
1059     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1060 }
1061
1062 sub iptables_get_chains {
1063
1064     my $res = {};
1065
1066     # check what chains we want to track
1067     my $is_pvefw_chain = sub {
1068         my $name = shift;
1069
1070         return 1 if $name =~ m/^PVEFW-\S+$/;
1071
1072         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1073
1074         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1075
1076         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1077
1078         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1079         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1080
1081         return undef;
1082     };
1083
1084     my $table = '';
1085
1086     my $hooks = {};
1087
1088     my $parser = sub {
1089         my $line = shift;
1090
1091         return if $line =~ m/^#/;
1092         return if $line =~ m/^\s*$/;
1093
1094         if ($line =~ m/^\*(\S+)$/) {
1095             $table = $1;
1096             return;
1097         }
1098
1099         return if $table ne 'filter';
1100
1101         if ($line =~ m/^:(\S+)\s/) {
1102             my $chain = $1;
1103             return if !&$is_pvefw_chain($chain);
1104             $res->{$chain} = "unknown";
1105         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1106             my ($chain, $sig) = ($1, $2);
1107             return if !&$is_pvefw_chain($chain);
1108             $res->{$chain} = $sig;
1109         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1110             $hooks->{$1} = 1;
1111         } else {
1112             # simply ignore the rest
1113             return;
1114         }
1115     };
1116
1117     run_command("/sbin/iptables-save", outfunc => $parser);
1118
1119     return wantarray ? ($res, $hooks) : $res;
1120 }
1121
1122 sub iptables_chain_digest {
1123     my ($rules) = @_;
1124     my $digest = Digest::SHA->new('sha1');
1125     foreach my $rule (@$rules) { # order is important
1126         $digest->add($rule);
1127     }
1128     return $digest->b64digest;
1129 }
1130
1131 sub ipset_chain_digest {
1132     my ($rules) = @_;
1133
1134     my $digest = Digest::SHA->new('sha1');
1135     foreach my $rule (sort @$rules) { # note: sorted
1136         $digest->add($rule);
1137     }
1138     return $digest->b64digest;
1139 }
1140
1141 sub ipset_get_chains {
1142
1143     my $res = {};
1144     my $chains = {};
1145
1146     my $parser = sub {
1147         my $line = shift;
1148
1149         return if $line =~ m/^#/;
1150         return if $line =~ m/^\s*$/;
1151         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1152             my $chain = $1;
1153             $line =~ s/\s+$//; # delete trailing white space
1154             push @{$chains->{$chain}}, $line;
1155         } else {
1156             # simply ignore the rest
1157             return;
1158         }
1159     };
1160
1161     run_command("/usr/sbin/ipset save", outfunc => $parser);
1162
1163     # compute digest for each chain
1164     foreach my $chain (keys %$chains) {
1165         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1166     }
1167
1168     return $res;
1169 }
1170
1171 sub ruleset_generate_cmdstr {
1172     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1173
1174     return if defined($rule->{enable}) && !$rule->{enable};
1175
1176     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1177
1178     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1179     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1180
1181     my @cmd = ();
1182
1183     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1184     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1185
1186     my $source = $rule->{source};
1187     my $dest = $rule->{dest};
1188
1189     if ($source) {
1190         if ($source =~ m/^\+/) {
1191             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1192                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1193                 push @cmd, "-m set --match-set PVEFW-$1 src";
1194             } else {
1195                 die "invalid security group name '$source'\n";
1196             }
1197         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1198             my $alias = lc($source);
1199             my $e = $cluster_conf->{aliases}->{$alias};
1200             die "no such alias $source\n" if !$e;
1201             push @cmd, "-s $e->{cidr}";
1202         } elsif ($source =~ m/\-/){
1203             push @cmd, "-m iprange --src-range $source";
1204
1205         } else {
1206             push @cmd, "-s $source";
1207         }
1208     }
1209
1210     if ($dest) {
1211         if ($dest =~ m/^\+/) {
1212             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1213                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1214                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1215             } else {
1216                 die "invalid security group name '$dest'\n";
1217             }
1218         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1219             my $alias = lc($dest);
1220             my $e = $cluster_conf->{aliases}->{$alias};
1221             die "no such alias $dest" if !$e;
1222             push @cmd, "-d $e->{cidr}";
1223         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1224             push @cmd, "-m iprange --dst-range $dest";
1225
1226         } else {
1227             push @cmd, "-d $dest";
1228         }
1229     }
1230
1231     if ($rule->{proto}) {
1232         push @cmd, "-p $rule->{proto}";
1233
1234         my $multiport = 0;
1235         $multiport++ if $nbdport > 1;
1236         $multiport++ if $nbsport > 1;
1237
1238         push @cmd, "--match multiport" if $multiport;
1239
1240         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1241             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1242
1243         if ($rule->{dport}) {
1244             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1245                 # Note: we use dport to store --icmp-type
1246                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1247                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1248             } else {
1249                 if ($nbdport > 1) {
1250                     if ($multiport == 2) {
1251                         push @cmd,  "--ports $rule->{dport}";
1252                     } else {
1253                         push @cmd, "--dports $rule->{dport}";
1254                     }
1255                 } else {
1256                     push @cmd, "--dport $rule->{dport}";
1257                 }
1258             }
1259         }
1260
1261         if ($rule->{sport}) {
1262             if ($nbsport > 1) {
1263                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1264             } else {
1265                 push @cmd, "--sport $rule->{sport}";
1266             }
1267         }
1268     } elsif ($rule->{dport} || $rule->{sport}) {
1269         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1270         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1271     }
1272
1273     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1274
1275     if (my $action = $rule->{action}) {
1276         $action = $actions->{$action} if defined($actions->{$action});
1277         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1278         push @cmd, $goto ? "-g $action" : "-j $action";
1279     }
1280
1281     return scalar(@cmd) ? join(' ', @cmd) : undef;
1282 }
1283
1284 sub ruleset_generate_rule {
1285     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1286
1287     my $rules;
1288
1289     if ($rule->{macro}) {
1290         $rules = &$apply_macro($rule->{macro}, $rule);
1291     } else {
1292         $rules = [ $rule ];
1293     }
1294
1295     # update all or nothing
1296
1297     my @cmds = ();
1298     foreach my $tmp (@$rules) {
1299         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1300             push @cmds, $cmdstr;
1301         }
1302     }
1303
1304     foreach my $cmdstr (@cmds) {
1305         ruleset_addrule($ruleset, $chain, $cmdstr);
1306     }
1307 }
1308
1309 sub ruleset_generate_rule_insert {
1310     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1311
1312     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1313
1314     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1315         ruleset_insertrule($ruleset, $chain, $cmdstr);
1316     }
1317 }
1318
1319 sub ruleset_create_chain {
1320     my ($ruleset, $chain) = @_;
1321
1322     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1323     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1324
1325     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1326
1327     $ruleset->{$chain} = [];
1328 }
1329
1330 sub ruleset_chain_exist {
1331     my ($ruleset, $chain) = @_;
1332
1333     return $ruleset->{$chain} ? 1 : undef;
1334 }
1335
1336 sub ruleset_addrule {
1337    my ($ruleset, $chain, $rule) = @_;
1338
1339    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1340
1341    push @{$ruleset->{$chain}}, "-A $chain $rule";
1342 }
1343
1344 sub ruleset_insertrule {
1345    my ($ruleset, $chain, $rule) = @_;
1346
1347    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1348
1349    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1350 }
1351
1352 sub get_log_rule_base {
1353     my ($chain, $vmid, $msg, $loglevel) = @_;
1354
1355     die "internal error - no log level" if !defined($loglevel);
1356
1357     $vmid = 0 if !defined($vmid);
1358
1359     # Note: we use special format for prefix to pass further
1360     # info to log daemon (VMID, LOGVELEL and CHAIN)
1361
1362     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1363 }
1364
1365 sub ruleset_addlog {
1366     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1367
1368     return if !defined($loglevel);
1369
1370     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1371
1372     $logrule = "$rule $logrule" if defined($rule);
1373
1374     ruleset_addrule($ruleset, $chain, $logrule);
1375 }
1376
1377 sub ruleset_add_chain_policy {
1378     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1379
1380     if ($policy eq 'ACCEPT') {
1381
1382         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1383                               { ACCEPT =>  $accept_action});
1384
1385     } elsif ($policy eq 'DROP') {
1386
1387         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1388
1389         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1390
1391         ruleset_addrule($ruleset, $chain, "-j DROP");
1392     } elsif ($policy eq 'REJECT') {
1393         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1394
1395         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1396
1397         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1398     } else {
1399         # should not happen
1400         die "internal error: unknown policy '$policy'";
1401     }
1402 }
1403
1404 sub ruleset_chain_add_conn_filters {
1405     my ($ruleset, $chain, $accept) = @_;
1406
1407     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1408     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1409 }
1410
1411 sub ruleset_chain_add_input_filters {
1412     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1413
1414     if ($cluster_conf->{ipset}->{blacklist}){
1415         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1416         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1417     }
1418
1419     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1420         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1421     }
1422
1423     if ($options->{tcpflags}) {
1424         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1425     }
1426 }
1427
1428 sub ruleset_create_vm_chain {
1429     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1430
1431     ruleset_create_chain($ruleset, $chain);
1432     my $accept = generate_nfqueue($options);
1433
1434     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1435         if ($direction eq 'OUT') {
1436             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1437                                                       proto => 'udp', sport => 68, dport => 67 });
1438         } else {
1439             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1440                                                       proto => 'udp', sport => 67, dport => 68 });
1441         }
1442     }
1443
1444     if ($direction eq 'OUT') {
1445         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1446             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1447         }
1448         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1449     }
1450 }
1451
1452 sub ruleset_add_group_rule {
1453     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1454
1455     my $group = $rule->{action};
1456     my $group_chain = "GROUP-$group-$direction";
1457     if(!ruleset_chain_exist($ruleset, $group_chain)){
1458         generate_group_rules($ruleset, $cluster_conf, $group);
1459     }
1460
1461     if ($direction eq 'OUT' && $rule->{iface_out}) {
1462         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1463     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1464         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1465     } else {
1466         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1467     }
1468
1469     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1470 }
1471
1472 sub ruleset_generate_vm_rules {
1473     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1474
1475     my $lc_direction = lc($direction);
1476
1477     my $in_accept = generate_nfqueue($options);
1478
1479     foreach my $rule (@$rules) {
1480         next if $rule->{iface} && $rule->{iface} ne $netid;
1481         next if !$rule->{enable};
1482         if ($rule->{type} eq 'group') {
1483             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1484                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1485         } else {
1486             next if $rule->{type} ne $lc_direction;
1487             eval {
1488                 if ($direction eq 'OUT') {
1489                     ruleset_generate_rule($ruleset, $chain, $rule,
1490                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1491                                           undef, $cluster_conf);
1492                 } else {
1493                     ruleset_generate_rule($ruleset, $chain, $rule,
1494                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1495                                           undef, $cluster_conf);
1496                 }
1497             };
1498             warn $@ if $@;
1499         }
1500     }
1501 }
1502
1503 sub generate_nfqueue {
1504     my ($options) = @_;
1505
1506     if ($options->{ips}) {
1507         my $action = "NFQUEUE";
1508         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1509             if (defined($3) && defined($1)) {
1510                 $action .= " --queue-balance $1:$3";
1511             } elsif (defined($1)) {
1512                 $action .= " --queue-num $1";
1513             }
1514         }
1515         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1516         return $action;
1517     } else {
1518         return "ACCEPT";
1519     }
1520 }
1521
1522 sub ruleset_generate_vm_ipsrules {
1523     my ($ruleset, $options, $direction, $iface) = @_;
1524
1525     if ($options->{ips} && $direction eq 'IN') {
1526         my $nfqueue = generate_nfqueue($options);
1527
1528         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1529             ruleset_create_chain($ruleset, "PVEFW-IPS");
1530         }
1531
1532         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1533     }
1534 }
1535
1536 sub generate_venet_rules_direction {
1537     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1538
1539     my $lc_direction = lc($direction);
1540
1541     my $rules = $vmfw_conf->{rules};
1542
1543     my $options = $vmfw_conf->{options};
1544     my $hostfw_options = $vmfw_conf->{options};
1545     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1546
1547     my $chain = "venet0-$vmid-$direction";
1548
1549     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1550
1551     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1552
1553     # implement policy
1554     my $policy;
1555
1556     if ($direction eq 'OUT') {
1557         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1558     } else {
1559         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1560     }
1561
1562     my $accept = generate_nfqueue($options);
1563     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1564     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1565
1566     if ($direction eq 'OUT') {
1567         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1568             action => $chain,
1569             source => $ip,
1570             iface_in => 'venet0'});
1571     } else {
1572         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1573             action => $chain,
1574             dest => $ip,
1575             iface_out => 'venet0'});
1576     }
1577 }
1578
1579 sub generate_tap_rules_direction {
1580     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1581
1582     my $lc_direction = lc($direction);
1583
1584     my $rules = $vmfw_conf->{rules};
1585
1586     my $options = $vmfw_conf->{options};
1587     my $hostfw_options = $hostfw_conf->{options};
1588     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1589
1590     my $tapchain = "$iface-$direction";
1591
1592     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1593
1594     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1595
1596     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1597
1598     # implement policy
1599     my $policy;
1600
1601     if ($direction eq 'OUT') {
1602         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1603     } else {
1604         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1605     }
1606
1607     my $accept = generate_nfqueue($options);
1608     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1609     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1610
1611     # plug the tap chain to bridge chain
1612     if ($direction eq 'IN') {
1613         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1614                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1615     } else {
1616         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1617                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1618     }
1619 }
1620
1621 sub enable_host_firewall {
1622     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1623
1624     my $options = $hostfw_conf->{options};
1625     my $cluster_options = $cluster_conf->{options};
1626     my $rules = $hostfw_conf->{rules};
1627     my $cluster_rules = $cluster_conf->{rules};
1628
1629     # host inbound firewall
1630     my $chain = "PVEFW-HOST-IN";
1631     ruleset_create_chain($ruleset, $chain);
1632
1633     my $loglevel = get_option_log_level($options, "log_level_in");
1634
1635     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1636
1637     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1638     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1639
1640     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1641     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1642     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1643
1644     # we use RETURN because we need to check also tap rules
1645     my $accept_action = 'RETURN';
1646
1647     # add host rules first, so that cluster wide rules can be overwritten
1648     foreach my $rule (@$rules, @$cluster_rules) {
1649         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1650         if ($rule->{type} eq 'group') {
1651             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1652         } elsif ($rule->{type} eq 'in') {
1653             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1654                                   undef, $cluster_conf);
1655         }
1656         delete $rule->{iface_in};
1657     }
1658
1659     # implement input policy
1660     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1661     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1662
1663     # host outbound firewall
1664     $chain = "PVEFW-HOST-OUT";
1665     ruleset_create_chain($ruleset, $chain);
1666
1667     $loglevel = get_option_log_level($options, "log_level_out");
1668
1669     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1670
1671     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1672
1673     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1674     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1675     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1676
1677     # we use RETURN because we may want to check other thigs later
1678     $accept_action = 'RETURN';
1679
1680     # add host rules first, so that cluster wide rules can be overwritten
1681     foreach my $rule (@$rules, @$cluster_rules) {
1682         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1683         if ($rule->{type} eq 'group') {
1684             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1685         } elsif ($rule->{type} eq 'out') {
1686             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1687                                   undef, $cluster_conf);
1688         }
1689         delete $rule->{iface_out};
1690     }
1691
1692     # implement output policy
1693     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1694     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1695
1696     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1697     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1698 }
1699
1700 sub generate_group_rules {
1701     my ($ruleset, $cluster_conf, $group) = @_;
1702
1703     my $rules = $cluster_conf->{groups}->{$group};
1704
1705     if (!$rules) {
1706         warn "no such security group '$group'\n";
1707         $rules = []; # create empty chain
1708     }
1709
1710     my $chain = "GROUP-${group}-IN";
1711
1712     ruleset_create_chain($ruleset, $chain);
1713     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1714
1715     foreach my $rule (@$rules) {
1716         next if $rule->{type} ne 'in';
1717         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1718     }
1719
1720     $chain = "GROUP-${group}-OUT";
1721
1722     ruleset_create_chain($ruleset, $chain);
1723     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1724
1725     foreach my $rule (@$rules) {
1726         next if $rule->{type} ne 'out';
1727         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1728         # check also other tap rules later
1729         ruleset_generate_rule($ruleset, $chain, $rule,
1730                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1731     }
1732 }
1733
1734 my $MAX_NETS = 32;
1735 my $valid_netdev_names = {};
1736 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1737     $valid_netdev_names->{"net$i"} = 1;
1738 }
1739
1740 sub parse_fw_rule {
1741     my ($line, $allow_iface, $allow_groups) = @_;
1742
1743     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1744
1745     chomp $line;
1746
1747     # we can add single line comments to the end of the rule
1748     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1749
1750     # we can disable a rule when prefixed with '|'
1751     my $enable = 1;
1752
1753     $enable = 0 if $line =~ s/^\|//;
1754
1755     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1756         die "unable to parse rule: $line\n";
1757
1758     $type = lc($1);
1759     $action = $2;
1760
1761     if ($type eq  'in' || $type eq 'out') {
1762         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1763             # OK
1764         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1765             $action = $2;
1766             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1767             die "unknown macro '$1'\n" if !$preferred_name;
1768             $macro = $preferred_name;
1769         } else {
1770             die "unknown action '$action'\n";
1771         }
1772     } elsif ($type eq 'group') {
1773         die "groups disabled\n" if !$allow_groups;
1774         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1775     } else {
1776         die "unknown rule type '$type'\n";
1777     }
1778
1779     while (length($line)) {
1780         if ($line =~ s/^-i (\S+)\s*//) {
1781             die "parameter -i not allowed\n" if !$allow_iface;
1782             $iface = $1;
1783             PVE::JSONSchema::pve_verify_iface($iface);
1784             next;
1785         }
1786
1787         last if $type eq 'group';
1788
1789         if ($line =~ s/^-p (\S+)\s*//) {
1790             $proto = $1;
1791             pve_fw_verify_protocol_spec($proto);
1792             next;
1793         }
1794         if ($line =~ s/^-dport (\S+)\s*//) {
1795             $dport = $1;
1796             parse_port_name_number_or_range($dport);
1797             next;
1798         }
1799         if ($line =~ s/^-sport (\S+)\s*//) {
1800             $sport = $1;
1801             parse_port_name_number_or_range($sport);
1802             next;
1803         }
1804         if ($line =~ s/^-source (\S+)\s*//) {
1805             $source = $1;
1806             parse_address_list($source);
1807             next;
1808         }
1809         if ($line =~ s/^-dest (\S+)\s*//) {
1810             $dest = $1;
1811             parse_address_list($dest);
1812             next;
1813         }
1814
1815         last;
1816     }
1817
1818     die "unable to parse rule parameters: $line\n" if length($line);
1819
1820     return {
1821         type => $type,
1822         enable => $enable,
1823         comment => $comment,
1824         action => $action,
1825         macro => $macro,
1826         iface => $iface,
1827         source => $source,
1828         dest => $dest,
1829         proto => $proto,
1830         dport => $dport,
1831         sport => $sport,
1832     };
1833 }
1834
1835 sub parse_vmfw_option {
1836     my ($line) = @_;
1837
1838     my ($opt, $value);
1839
1840     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1841
1842     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1843         $opt = lc($1);
1844         $value = int($2);
1845     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1846         $opt = lc($1);
1847         $value = $2 ? lc($3) : '';
1848     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1849         $opt = lc($1);
1850         $value = uc($3);
1851     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1852         $opt = lc($1);
1853         $value = $2;
1854     } else {
1855         chomp $line;
1856         die "can't parse option '$line'\n"
1857     }
1858
1859     return ($opt, $value);
1860 }
1861
1862 sub parse_hostfw_option {
1863     my ($line) = @_;
1864
1865     my ($opt, $value);
1866
1867     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1868
1869     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1870         $opt = lc($1);
1871         $value = int($2);
1872     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1873         $opt = lc($1);
1874         $value = $2 ? lc($3) : '';
1875     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1876         $opt = lc($1);
1877         $value = int($2);
1878     } else {
1879         chomp $line;
1880         die "can't parse option '$line'\n"
1881     }
1882
1883     return ($opt, $value);
1884 }
1885
1886 sub parse_clusterfw_option {
1887     my ($line) = @_;
1888
1889     my ($opt, $value);
1890
1891     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1892         $opt = lc($1);
1893         $value = int($2);
1894     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1895         $opt = lc($1);
1896         $value = uc($3);
1897     } else {
1898         chomp $line;
1899         die "can't parse option '$line'\n"
1900     }
1901
1902     return ($opt, $value);
1903 }
1904
1905 sub parse_clusterfw_alias {
1906     my ($line) = @_;
1907
1908     # we can add single line comments to the end of the line
1909     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1910
1911     if ($line =~ m/^(\S+)\s(\S+)$/) {
1912         my ($name, $cidr) = ($1, $2);
1913         $cidr =~ s|/32$||;
1914         pve_verify_ipv4_or_cidr($cidr);
1915         my $data = {
1916             name => $name,
1917             cidr => $cidr,
1918         };
1919         $data->{comment} = $comment  if $comment;
1920         return $data;
1921     }
1922
1923     return undef;
1924 }
1925
1926 sub parse_vm_fw_rules {
1927     my ($filename, $fh) = @_;
1928
1929     my $res = { rules => [], options => {}};
1930
1931     my $section;
1932
1933     while (defined(my $line = <$fh>)) {
1934         next if $line =~ m/^#/;
1935         next if $line =~ m/^\s*$/;
1936
1937         my $linenr = $fh->input_line_number();
1938         my $prefix = "$filename (line $linenr)";
1939
1940         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1941             $section = lc($1);
1942             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1943             next;
1944         }
1945         if (!$section) {
1946             warn "$prefix: skip line - no section";
1947             next;
1948         }
1949
1950         next if !$res->{$section}; # skip undefined section
1951
1952         if ($section eq 'options') {
1953             eval {
1954                 my ($opt, $value) = parse_vmfw_option($line);
1955                 $res->{options}->{$opt} = $value;
1956             };
1957             warn "$prefix: $@" if $@;
1958             next;
1959         }
1960
1961         my $rule;
1962         eval { $rule = parse_fw_rule($line, 1, 1); };
1963         if (my $err = $@) {
1964             warn "$prefix: $err";
1965             next;
1966         }
1967
1968         push @{$res->{$section}}, $rule;
1969     }
1970
1971     return $res;
1972 }
1973
1974 sub parse_host_fw_rules {
1975     my ($filename, $fh) = @_;
1976
1977     my $res = { rules => [], options => {}};
1978
1979     my $section;
1980
1981     while (defined(my $line = <$fh>)) {
1982         next if $line =~ m/^#/;
1983         next if $line =~ m/^\s*$/;
1984
1985         my $linenr = $fh->input_line_number();
1986         my $prefix = "$filename (line $linenr)";
1987
1988         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1989             $section = lc($1);
1990             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1991             next;
1992         }
1993         if (!$section) {
1994             warn "$prefix: skip line - no section";
1995             next;
1996         }
1997
1998         next if !$res->{$section}; # skip undefined section
1999
2000         if ($section eq 'options') {
2001             eval {
2002                 my ($opt, $value) = parse_hostfw_option($line);
2003                 $res->{options}->{$opt} = $value;
2004             };
2005             warn "$prefix: $@" if $@;
2006             next;
2007         }
2008
2009         my $rule;
2010         eval { $rule = parse_fw_rule($line, 1, 1); };
2011         if (my $err = $@) {
2012             warn "$prefix: $err";
2013             next;
2014         }
2015
2016         push @{$res->{$section}}, $rule;
2017     }
2018
2019     return $res;
2020 }
2021
2022 sub parse_cluster_fw_rules {
2023     my ($filename, $fh) = @_;
2024
2025     my $section;
2026     my $group;
2027
2028     my $res = {
2029         rules => [],
2030         options => {},
2031         aliases => {},
2032         groups => {},
2033         group_comments => {},
2034         ipset => {} ,
2035         ipset_comments => {},
2036     };
2037
2038     while (defined(my $line = <$fh>)) {
2039         next if $line =~ m/^#/;
2040         next if $line =~ m/^\s*$/;
2041
2042         my $linenr = $fh->input_line_number();
2043         my $prefix = "$filename (line $linenr)";
2044
2045         if ($line =~ m/^\[options\]$/i) {
2046             $section = 'options';
2047             next;
2048         }
2049
2050         if ($line =~ m/^\[aliases\]$/i) {
2051             $section = 'aliases';
2052             next;
2053         }
2054
2055         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2056             $section = 'groups';
2057             $group = lc($1);
2058             my $comment = $2;
2059             $res->{$section}->{$group} = [];
2060             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2061                 if $comment;
2062             next;
2063         }
2064
2065         if ($line =~ m/^\[rules\]$/i) {
2066             $section = 'rules';
2067             next;
2068         }
2069
2070         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2071             $section = 'ipset';
2072             $group = lc($1);
2073             my $comment = $2;
2074             $res->{$section}->{$group} = [];
2075             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2076                 if $comment;
2077             next;
2078         }
2079
2080         if (!$section) {
2081             warn "$prefix: skip line - no section\n";
2082             next;
2083         }
2084
2085         if ($section eq 'options') {
2086             eval {
2087                 my ($opt, $value) = parse_clusterfw_option($line);
2088                 $res->{options}->{$opt} = $value;
2089             };
2090             warn "$prefix: $@" if $@;
2091         } elsif ($section eq 'aliases') {
2092             eval {
2093                 my $data = parse_clusterfw_alias($line);
2094                 $res->{aliases}->{lc($data->{name})} = $data;
2095             };
2096             warn "$prefix: $@" if $@;
2097         } elsif ($section eq 'rules') {
2098             my $rule;
2099             eval { $rule = parse_fw_rule($line, 1, 1); };
2100             if (my $err = $@) {
2101                 warn "$prefix: $err";
2102                 next;
2103             }
2104             push @{$res->{$section}}, $rule;
2105         } elsif ($section eq 'groups') {
2106             my $rule;
2107             eval { $rule = parse_fw_rule($line, 0, 0); };
2108             if (my $err = $@) {
2109                 warn "$prefix: $err";
2110                 next;
2111             }
2112             push @{$res->{$section}->{$group}}, $rule;
2113         } elsif ($section eq 'ipset') {
2114             # we can add single line comments to the end of the rule
2115             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2116
2117             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2118             my $nomatch = $1;
2119             my $cidr = $2;
2120
2121             if($cidr !~ m/^${ip_alias_pattern}$/) {
2122                 $cidr =~ s|/32$||;
2123
2124                 eval { pve_verify_ipv4_or_cidr($cidr); };
2125                 if (my $err = $@) {
2126                     warn "$prefix: $cidr - $err";
2127                     next;
2128                 }
2129             }
2130
2131             my $entry = { cidr => $cidr };
2132             $entry->{nomatch} = 1 if $nomatch;
2133             $entry->{comment} = $comment if $comment;
2134
2135             push @{$res->{$section}->{$group}}, $entry;
2136         }
2137     }
2138
2139     return $res;
2140 }
2141
2142 sub run_locked {
2143     my ($code, @param) = @_;
2144
2145     my $timeout = 10;
2146
2147     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2148
2149     die $@ if $@;
2150
2151     return $res;
2152 }
2153
2154 sub read_local_vm_config {
2155
2156     my $openvz = {};
2157     my $qemu = {};
2158
2159     my $vmdata = { openvz => $openvz, qemu => $qemu };
2160
2161     my $vmlist = PVE::Cluster::get_vmlist();
2162     return $vmdata if !$vmlist || !$vmlist->{ids};
2163     my $ids = $vmlist->{ids};
2164
2165     foreach my $vmid (keys %$ids) {
2166         next if !$vmid; # skip VE0
2167         my $d = $ids->{$vmid};
2168         next if !$d->{node} || $d->{node} ne $nodename;
2169         next if !$d->{type};
2170         if ($d->{type} eq 'openvz') {
2171             if ($have_pve_manager) {
2172                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2173                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2174                     $openvz->{$vmid} = $conf;
2175                 }
2176             }
2177         } elsif ($d->{type} eq 'qemu') {
2178             if ($have_qemu_server) {
2179                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2180                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2181                     $qemu->{$vmid} = $conf;
2182                 }
2183             }
2184         }
2185     }
2186
2187     return $vmdata;
2188 };
2189
2190 sub load_vmfw_conf {
2191     my ($vmid, $dir) = @_;
2192
2193     my $vmfw_conf = {};
2194
2195     $dir = "/etc/pve/firewall" if !defined($dir);
2196
2197     my $filename = "$dir/$vmid.fw";
2198     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2199         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2200     }
2201
2202     return $vmfw_conf;
2203 }
2204
2205 my $format_rules = sub {
2206     my ($rules, $allow_iface) = @_;
2207
2208     my $raw = '';
2209
2210     foreach my $rule (@$rules) {
2211         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2212             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2213             $raw .= uc($rule->{type});
2214             if ($rule->{macro}) {
2215                 $raw .= " $rule->{macro}($rule->{action})";
2216             } else {
2217                 $raw .= " " . $rule->{action};
2218             }
2219             if ($allow_iface && $rule->{iface}) {
2220                 $raw .= " -i $rule->{iface}";
2221             }
2222
2223             if ($rule->{type} ne  'group')  {
2224                 $raw .= " -source $rule->{source}" if $rule->{source};
2225                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2226                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2227                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2228                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2229             }
2230
2231             $raw .= " # " . encode('utf8', $rule->{comment})
2232                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2233             $raw .= "\n";
2234         } else {
2235             die "unknown rule type '$rule->{type}'";
2236         }
2237     }
2238
2239     return $raw;
2240 };
2241
2242 my $format_options = sub {
2243     my ($options) = @_;
2244
2245     my $raw = '';
2246
2247     $raw .= "[OPTIONS]\n\n";
2248     foreach my $opt (keys %$options) {
2249         $raw .= "$opt: $options->{$opt}\n";
2250     }
2251     $raw .= "\n";
2252
2253     return $raw;
2254 };
2255
2256 my $format_aliases = sub {
2257     my ($aliases) = @_;
2258
2259     my $raw = '';
2260
2261     $raw .= "[ALIASES]\n\n";
2262     foreach my $k (keys %$aliases) {
2263         my $e = $aliases->{$k};
2264         $raw .= "$e->{name} $e->{cidr}";
2265         $raw .= " # " . encode('utf8', $e->{comment})
2266             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2267         $raw .= "\n";
2268     }
2269     $raw .= "\n";
2270
2271     return $raw;
2272 };
2273
2274 my $format_ipset = sub {
2275     my ($options) = @_;
2276
2277     my $raw = '';
2278
2279     my $nethash = {};
2280     foreach my $entry (@$options) {
2281         $nethash->{$entry->{cidr}} = $entry;
2282     }
2283
2284     foreach my $cidr (sort keys %$nethash) {
2285         my $entry = $nethash->{$cidr};
2286         my $line = $entry->{nomatch} ? '!' : '';
2287         $line .= $entry->{cidr};
2288         $line .= " # " . encode('utf8', $entry->{comment})
2289             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2290         $raw .= "$line\n";
2291     }
2292
2293     return $raw;
2294 };
2295
2296 sub save_vmfw_conf {
2297     my ($vmid, $vmfw_conf) = @_;
2298
2299     my $raw = '';
2300
2301     my $options = $vmfw_conf->{options};
2302     $raw .= &$format_options($options) if scalar(keys %$options);
2303
2304     my $rules = $vmfw_conf->{rules} || [];
2305     if (scalar(@$rules)) {
2306         $raw .= "[RULES]\n\n";
2307         $raw .= &$format_rules($rules, 1);
2308         $raw .= "\n";
2309     }
2310
2311     my $filename = "/etc/pve/firewall/$vmid.fw";
2312     PVE::Tools::file_set_contents($filename, $raw);
2313 }
2314
2315 sub read_vm_firewall_configs {
2316     my ($vmdata, $dir) = @_;
2317
2318     my $vmfw_configs = {};
2319
2320     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2321         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2322         next if !$vmfw_conf->{options}; # skip if file does not exists
2323         $vmfw_configs->{$vmid} = $vmfw_conf;
2324     }
2325
2326     return $vmfw_configs;
2327 }
2328
2329 sub get_option_log_level {
2330     my ($options, $k) = @_;
2331
2332     my $v = $options->{$k};
2333     $v = $default_log_level if !defined($v);
2334
2335     return undef if $v eq '' || $v eq 'nolog';
2336
2337     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2338
2339     return $v if ($v >= 0) && ($v <= 7);
2340
2341     warn "unknown log level ($k = '$v')\n";
2342
2343     return undef;
2344 }
2345
2346 sub generate_std_chains {
2347     my ($ruleset, $options) = @_;
2348
2349     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2350
2351     # same as shorewall smurflog.
2352     my $chain = 'PVEFW-smurflog';
2353     $pve_std_chains->{$chain} = [];
2354
2355     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2356     push @{$pve_std_chains->{$chain}}, "-j DROP";
2357
2358     # same as shorewall logflags action.
2359     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2360     $chain = 'PVEFW-logflags';
2361     $pve_std_chains->{$chain} = [];
2362
2363     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2364     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2365     push @{$pve_std_chains->{$chain}}, "-j DROP";
2366
2367     foreach my $chain (keys %$pve_std_chains) {
2368         ruleset_create_chain($ruleset, $chain);
2369         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2370             if (ref($rule)) {
2371                 ruleset_generate_rule($ruleset, $chain, $rule);
2372             } else {
2373                 ruleset_addrule($ruleset, $chain, $rule);
2374             }
2375         }
2376     }
2377 }
2378
2379 sub generate_ipset_chains {
2380     my ($ipset_ruleset, $fw_conf) = @_;
2381
2382     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2383         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2384     }
2385 }
2386
2387 sub generate_ipset {
2388     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2389
2390     my $hashsize = scalar(@$options);
2391     if ($hashsize <= 64) {
2392         $hashsize = 64;
2393     } else {
2394         $hashsize = round_powerof2($hashsize);
2395     }
2396
2397     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2398
2399     # remove duplicates
2400     my $nethash = {};
2401     foreach my $entry (@$options) {
2402         my $cidr = $entry->{cidr};
2403         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2404             my $alias = lc($cidr);
2405             if ($aliases->{$alias}) {
2406                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2407                 $nethash->{$entry->{cidr}} = $entry;
2408             } else {
2409                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2410             }
2411         } else {
2412             $nethash->{$entry->{cidr}} = $entry;
2413         }
2414     }
2415
2416     foreach my $cidr (sort keys %$nethash) {
2417         my $entry = $nethash->{$cidr};
2418
2419         my $cmd = "add $name $cidr";
2420         if ($entry->{nomatch}) {
2421             if ($feature_ipset_nomatch) {
2422                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2423             } else {
2424                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2425             }
2426         } else {
2427             push @{$ipset_ruleset->{$name}}, $cmd;
2428         }
2429     }
2430 }
2431
2432 sub round_powerof2 {
2433     my ($int) = @_;
2434
2435     $int--;
2436     $int |= $int >> $_ foreach (1,2,4,8,16);
2437     return ++$int;
2438 }
2439
2440 sub load_clusterfw_conf {
2441     my ($filename) = @_;
2442
2443     $filename = $clusterfw_conf_filename if !defined($filename);
2444
2445     my $cluster_conf = {};
2446     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2447         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2448     }
2449
2450     return $cluster_conf;
2451 }
2452
2453 sub save_clusterfw_conf {
2454     my ($cluster_conf) = @_;
2455
2456     my $raw = '';
2457
2458     my $options = $cluster_conf->{options};
2459     $raw .= &$format_options($options) if scalar(keys %$options);
2460
2461     my $aliases = $cluster_conf->{aliases};
2462     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2463
2464     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2465         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2466             my $utf8comment = encode('utf8', $comment);
2467             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2468         } else {
2469             $raw .= "[IPSET $ipset]\n\n";
2470         }
2471         my $options = $cluster_conf->{ipset}->{$ipset};
2472         $raw .= &$format_ipset($options);
2473         $raw .= "\n";
2474     }
2475
2476     my $rules = $cluster_conf->{rules};
2477     if (scalar(@$rules)) {
2478         $raw .= "[RULES]\n\n";
2479         $raw .= &$format_rules($rules, 1);
2480         $raw .= "\n";
2481     }
2482
2483     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2484         my $rules = $cluster_conf->{groups}->{$group};
2485         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2486             my $utf8comment = encode('utf8', $comment);
2487             $raw .= "[group $group] # $utf8comment\n\n";
2488         } else {
2489             $raw .= "[group $group]\n\n";
2490         }
2491
2492         $raw .= &$format_rules($rules, 0);
2493         $raw .= "\n";
2494     }
2495
2496     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2497 }
2498
2499 sub load_hostfw_conf {
2500     my ($filename) = @_;
2501
2502     $filename = $hostfw_conf_filename if !defined($filename);
2503
2504     my $hostfw_conf = {};
2505     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2506         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2507     }
2508     return $hostfw_conf;
2509 }
2510
2511 sub save_hostfw_conf {
2512     my ($hostfw_conf) = @_;
2513
2514     my $raw = '';
2515
2516     my $options = $hostfw_conf->{options};
2517     $raw .= &$format_options($options) if scalar(keys %$options);
2518
2519     my $rules = $hostfw_conf->{rules};
2520     if (scalar(@$rules)) {
2521         $raw .= "[RULES]\n\n";
2522         $raw .= &$format_rules($rules, 1);
2523         $raw .= "\n";
2524     }
2525
2526     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2527 }
2528
2529 sub compile {
2530     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2531
2532     my $vmfw_configs;
2533
2534     if ($vmdata) { # test mode
2535         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2536         my $filename = "$testdir/cluster.fw";
2537         die "missing test file '$filename'\n" if ! -f $filename;
2538         $cluster_conf = load_clusterfw_conf($filename);
2539
2540         $filename = "$testdir/host.fw";
2541         die "missing test file '$filename'\n" if ! -f $filename;
2542         $hostfw_conf = load_hostfw_conf($filename);
2543
2544         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2545     } else { # normal operation
2546         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2547
2548         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2549
2550         $vmdata = read_local_vm_config();
2551         $vmfw_configs = read_vm_firewall_configs($vmdata);
2552     }
2553
2554
2555     $cluster_conf->{ipset}->{venet0} = [];
2556
2557     my $ruleset = {};
2558
2559     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2560     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2561
2562     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2563
2564     my $hostfw_options = $hostfw_conf->{options} || {};
2565
2566     # fixme: what log level should we use here?
2567     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2568
2569     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2570
2571     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2572     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2573     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2574
2575     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2576     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2577
2578     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2579
2580     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2581     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2582
2583     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2584     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2585
2586     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2587
2588     generate_std_chains($ruleset, $hostfw_options);
2589
2590     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2591
2592     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2593
2594     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2595
2596     # generate firewall rules for QEMU VMs
2597     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2598         my $conf = $vmdata->{qemu}->{$vmid};
2599         my $vmfw_conf = $vmfw_configs->{$vmid};
2600         next if !$vmfw_conf;
2601         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2602
2603         foreach my $netid (keys %$conf) {
2604             next if $netid !~ m/^net(\d+)$/;
2605             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2606             next if !$net->{firewall};
2607             my $iface = "tap${vmid}i$1";
2608
2609             my $macaddr = $net->{macaddr};
2610             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2611                                          $vmfw_conf, $vmid, 'IN');
2612             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2613                                          $vmfw_conf, $vmid, 'OUT');
2614         }
2615     }
2616
2617     # generate firewall rules for OpenVZ containers
2618     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2619         my $conf = $vmdata->{openvz}->{$vmid};
2620
2621         my $vmfw_conf = $vmfw_configs->{$vmid};
2622         next if !$vmfw_conf;
2623         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2624
2625         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2626             my $ip = $conf->{ip_address}->{value};
2627             $ip =~ s/\s+/,/g;
2628             parse_address_list($ip); # make sure we have a valid $ip list
2629
2630             my @ips = split(',', $ip);
2631
2632             foreach my $singleip (@ips) {
2633                 my $venet0ipset = {};
2634                 $venet0ipset->{cidr} = $singleip;
2635                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2636             }
2637
2638             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2639             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2640         }
2641
2642         if ($conf->{netif} && $conf->{netif}->{value}) {
2643             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2644             foreach my $netid (keys %$netif) {
2645                 my $d = $netif->{$netid};
2646
2647                 my $macaddr = $d->{mac};
2648                 my $iface = $d->{host_ifname};
2649                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2650                                              $vmfw_conf, $vmid, 'IN');
2651                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2652                                              $vmfw_conf, $vmid, 'OUT');
2653             }
2654         }
2655     }
2656
2657     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2658         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2659     }
2660
2661     my $ipset_ruleset = {};
2662     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2663
2664     return ($ruleset, $ipset_ruleset);
2665 }
2666
2667 sub get_ruleset_status {
2668     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2669
2670     my $statushash = {};
2671
2672     foreach my $chain (sort keys %$ruleset) {
2673         my $sig = &$digest_fn($ruleset->{$chain});
2674
2675         $statushash->{$chain}->{sig} = $sig;
2676
2677         my $oldsig = $active_chains->{$chain};
2678         if (!defined($oldsig)) {
2679             $statushash->{$chain}->{action} = 'create';
2680         } else {
2681             if ($oldsig eq $sig) {
2682                 $statushash->{$chain}->{action} = 'exists';
2683             } else {
2684                 $statushash->{$chain}->{action} = 'update';
2685             }
2686         }
2687         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2688         foreach my $cmd (@{$ruleset->{$chain}}) {
2689             print "\t$cmd\n" if $verbose;
2690         }
2691     }
2692
2693     foreach my $chain (sort keys %$active_chains) {
2694         if (!defined($ruleset->{$chain})) {
2695             my $sig = $active_chains->{$chain};
2696             $statushash->{$chain}->{action} = 'delete';
2697             $statushash->{$chain}->{sig} = $sig;
2698             print "delete $chain ($sig)\n" if $verbose;
2699         }
2700     }
2701
2702     return $statushash;
2703 }
2704
2705 sub print_sig_rule {
2706     my ($chain, $sig) = @_;
2707
2708     # We just use this to store a SHA1 checksum used to detect changes
2709     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2710 }
2711
2712 sub get_ruleset_cmdlist {
2713     my ($ruleset, $verbose) = @_;
2714
2715     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2716
2717     my ($active_chains, $hooks) = iptables_get_chains();
2718     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2719
2720     # create missing chains first
2721     foreach my $chain (sort keys %$ruleset) {
2722         my $stat = $statushash->{$chain};
2723         die "internal error" if !$stat;
2724         next if $stat->{action} ne 'create';
2725
2726         $cmdlist .= ":$chain - [0:0]\n";
2727     }
2728
2729     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2730         if (!$hooks->{$h}) {
2731             $cmdlist .= "-A $h -j PVEFW-$h\n";
2732         }
2733     }
2734
2735     foreach my $chain (sort keys %$ruleset) {
2736         my $stat = $statushash->{$chain};
2737         die "internal error" if !$stat;
2738
2739         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2740             $cmdlist .= "-F $chain\n";
2741             foreach my $cmd (@{$ruleset->{$chain}}) {
2742                 $cmdlist .= "$cmd\n";
2743             }
2744             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2745         } elsif ($stat->{action} eq 'delete') {
2746             die "internal error"; # this should not happen
2747         } elsif ($stat->{action} eq 'exists') {
2748             # do nothing
2749         } else {
2750             die "internal error - unknown status '$stat->{action}'";
2751         }
2752     }
2753
2754     foreach my $chain (keys %$statushash) {
2755         next if $statushash->{$chain}->{action} ne 'delete';
2756         $cmdlist .= "-F $chain\n";
2757     }
2758     foreach my $chain (keys %$statushash) {
2759         next if $statushash->{$chain}->{action} ne 'delete';
2760         next if $chain eq 'PVEFW-INPUT';
2761         next if $chain eq 'PVEFW-OUTPUT';
2762         next if $chain eq 'PVEFW-FORWARD';
2763         $cmdlist .= "-X $chain\n";
2764     }
2765
2766     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2767
2768     $cmdlist .= "COMMIT\n";
2769
2770     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2771 }
2772
2773 sub get_ipset_cmdlist {
2774     my ($ruleset, $verbose) = @_;
2775
2776     my $cmdlist = "";
2777
2778     my $delete_cmdlist = "";
2779
2780     my $active_chains = ipset_get_chains();
2781     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2782
2783     # remove stale _swap chains
2784     foreach my $chain (keys %$active_chains) {
2785         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2786             $cmdlist .= "destroy $chain\n";
2787         }
2788     }
2789
2790     foreach my $chain (sort keys %$ruleset) {
2791         my $stat = $statushash->{$chain};
2792         die "internal error" if !$stat;
2793
2794         if ($stat->{action} eq 'create') {
2795             foreach my $cmd (@{$ruleset->{$chain}}) {
2796                 $cmdlist .= "$cmd\n";
2797             }
2798         }
2799
2800         if ($stat->{action} eq 'update') {
2801             my $chain_swap = $chain."_swap";
2802
2803             foreach my $cmd (@{$ruleset->{$chain}}) {
2804                 $cmd =~ s/$chain/$chain_swap/;
2805                 $cmdlist .= "$cmd\n";
2806             }
2807             $cmdlist .= "swap $chain_swap $chain\n";
2808             $cmdlist .= "flush $chain_swap\n";
2809             $cmdlist .= "destroy $chain_swap\n";
2810         }
2811
2812     }
2813
2814     foreach my $chain (keys %$statushash) {
2815         next if $statushash->{$chain}->{action} ne 'delete';
2816
2817         $delete_cmdlist .= "flush $chain\n";
2818         $delete_cmdlist .= "destroy $chain\n";
2819     }
2820
2821     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2822
2823     return ($cmdlist, $delete_cmdlist, $changes);
2824 }
2825
2826 sub apply_ruleset {
2827     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2828
2829     enable_bridge_firewall();
2830
2831     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2832         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2833
2834     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2835
2836     if ($verbose) {
2837         if ($ipset_changes) {
2838             print "ipset changes:\n";
2839             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2840             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2841         }
2842
2843         if ($changes) {
2844             print "iptables changes:\n";
2845             print $cmdlist;
2846         }
2847     }
2848
2849     ipset_restore_cmdlist($ipset_create_cmdlist);
2850
2851     iptables_restore_cmdlist($cmdlist);
2852
2853     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2854
2855     # test: re-read status and check if everything is up to date
2856     my $active_chains = iptables_get_chains();
2857     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2858
2859     my $errors;
2860     foreach my $chain (sort keys %$ruleset) {
2861         my $stat = $statushash->{$chain};
2862         if ($stat->{action} ne 'exists') {
2863             warn "unable to update chain '$chain'\n";
2864             $errors = 1;
2865         }
2866     }
2867
2868     die "unable to apply firewall changes\n" if $errors;
2869
2870     update_nf_conntrack_max($hostfw_conf);
2871
2872     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2873
2874 }
2875
2876 sub update_nf_conntrack_max {
2877     my ($hostfw_conf) = @_;
2878
2879     my $max = 65536; # reasonable default
2880
2881     my $options = $hostfw_conf->{options} || {};
2882
2883     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2884         $max = $options->{nf_conntrack_max};
2885         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2886     }
2887
2888     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2889     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2890
2891     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2892
2893     if ($current != $max) {
2894         my $hashsize = int($max/4);
2895         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2896         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2897     }
2898 }
2899
2900 sub update_nf_conntrack_tcp_timeout_established {
2901     my ($hostfw_conf) = @_;
2902
2903     my $options = $hostfw_conf->{options} || {};
2904
2905     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2906
2907     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2908 }
2909
2910 sub remove_pvefw_chains {
2911
2912     my ($chash, $hooks) = iptables_get_chains();
2913     my $cmdlist = "*filter\n";
2914
2915     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2916         if ($hooks->{$h}) {
2917             $cmdlist .= "-D $h -j PVEFW-$h\n";
2918         }
2919     }
2920
2921     foreach my $chain (keys %$chash) {
2922         $cmdlist .= "-F $chain\n";
2923     }
2924
2925     foreach my $chain (keys %$chash) {
2926         $cmdlist .= "-X $chain\n";
2927     }
2928     $cmdlist .= "COMMIT\n";
2929
2930     iptables_restore_cmdlist($cmdlist);
2931 }
2932
2933 sub update {
2934     my ($verbose) = @_;
2935
2936     my $code = sub {
2937
2938         my $cluster_conf = load_clusterfw_conf();
2939         my $cluster_options = $cluster_conf->{options};
2940
2941         my $enable = $cluster_options->{enable};
2942
2943         die "Firewall is disabled - cannot start\n" if !$enable;
2944
2945         if (!$enable) {
2946             PVE::Firewall::remove_pvefw_chains();
2947             print "Firewall disabled\n" if $verbose;
2948             return;
2949         }
2950
2951         my $hostfw_conf = load_hostfw_conf();
2952
2953         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2954
2955         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2956     };
2957
2958     run_locked($code);
2959 }
2960
2961
2962 1;