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 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
 102
 103 my $default_log_level = 'info';
 104
 105 my $log_level_hash = {
 106     debug => 7,
 107     info => 6,
 108     notice => 5,
 109     warning => 4,
 110     err => 3,
 111     crit => 2,
 112     alert => 1,
 113     emerg => 0,
 114 };
 115
 116 # imported/converted from: /usr/share/shorewall/macro.*
 117 my $pve_fw_macros = {
 118     'Amanda' => [
 119         "Amanda Backup",
 120         { action => 'PARAM', proto => 'udp', dport => '10080' },
 121         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 122     ],
 123     'Auth' => [
 124         "Auth (identd) traffic",
 125         { action => 'PARAM', proto => 'tcp', dport => '113' },
 126     ],
 127     'BGP' => [
 128         "Border Gateway Protocol traffic",
 129         { action => 'PARAM', proto => 'tcp', dport => '179' },
 130     ],
 131     'BitTorrent' => [
 132         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 133         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 134         { action => 'PARAM', proto => 'udp', dport => '6881' },
 135     ],
 136     'BitTorrent32' => [
 137         "BitTorrent traffic for BitTorrent 3.2 and later",
 138         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 139         { action => 'PARAM', proto => 'udp', dport => '6881' },
 140     ],
 141     'CVS' => [
 142         "Concurrent Versions System pserver traffic",
 143         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 144     ],
 145     'Citrix' => [
 146         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 147         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 148         { action => 'PARAM', proto => 'udp', dport => '1604' },
 149         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 150     ],
 151     'DAAP' => [
 152         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 153         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 154         { action => 'PARAM', proto => 'udp', dport => '3689' },
 155     ],
 156     'DCC' => [
 157         "Distributed Checksum Clearinghouse spam filtering mechanism",
 158         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 159     ],
 160     'DHCPfwd' => [
 161         "Forwarded DHCP traffic (bidirectional)",
 162         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 163         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 164     ],
 165     'DNS' => [
 166         "Domain Name System traffic (upd and tcp)",
 167         { action => 'PARAM', proto => 'udp', dport => '53' },
 168         { action => 'PARAM', proto => 'tcp', dport => '53' },
 169     ],
 170     'Distcc' => [
 171         "Distributed Compiler service",
 172         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 173     ],
 174     'FTP' => [
 175         "File Transfer Protocol",
 176         { action => 'PARAM', proto => 'tcp', dport => '21' },
 177     ],
 178     'Finger' => [
 179         "Finger protocol (RFC 742)",
 180         { action => 'PARAM', proto => 'tcp', dport => '79' },
 181     ],
 182     'GNUnet' => [
 183         "GNUnet secure peer-to-peer networking traffic",
 184         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 185         { action => 'PARAM', proto => 'udp', dport => '2086' },
 186         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 187         { action => 'PARAM', proto => 'udp', dport => '1080' },
 188     ],
 189     'GRE' => [
 190         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 191         { action => 'PARAM', proto => '47' },
 192         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 193     ],
 194     'Git' => [
 195         "Git distributed revision control traffic",
 196         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 197     ],
 198     'HKP' => [
 199         "OpenPGP HTTP keyserver protocol traffic",
 200         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 201     ],
 202     'HTTP' => [
 203         "Hypertext Transfer Protocol (WWW)",
 204         { action => 'PARAM', proto => 'tcp', dport => '80' },
 205     ],
 206     'HTTPS' => [
 207         "Hypertext Transfer Protocol (WWW) over SSL",
 208         { action => 'PARAM', proto => 'tcp', dport => '443' },
 209     ],
 210     'ICPV2' => [
 211         "Internet Cache Protocol V2 (Squid) traffic",
 212         { action => 'PARAM', proto => 'udp', dport => '3130' },
 213     ],
 214     'ICQ' => [
 215         "AOL Instant Messenger traffic",
 216         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 217     ],
 218     'IMAP' => [
 219         "Internet Message Access Protocol",
 220         { action => 'PARAM', proto => 'tcp', dport => '143' },
 221     ],
 222     'IMAPS' => [
 223         "Internet Message Access Protocol over SSL",
 224         { action => 'PARAM', proto => 'tcp', dport => '993' },
 225     ],
 226     'IPIP' => [
 227         "IPIP capsulation traffic (bidirectional)",
 228         { action => 'PARAM', proto => '94' },
 229         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 230     ],
 231     'IPsec' => [
 232         "IPsec traffic (bidirectional)",
 233         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 234         { action => 'PARAM', proto => '50' },
 235         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 236         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 237     ],
 238     'IPsecah' => [
 239         "IPsec authentication (AH) traffic (bidirectional)",
 240         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 241         { action => 'PARAM', proto => '51' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 243         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 244     ],
 245     'IPsecnat' => [
 246         "IPsec traffic and Nat-Traversal (bidirectional)",
 247         { action => 'PARAM', proto => 'udp', dport => '500' },
 248         { action => 'PARAM', proto => 'udp', dport => '4500' },
 249         { action => 'PARAM', proto => '50' },
 250         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 251         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 252         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 253     ],
 254     'IRC' => [
 255         "Internet Relay Chat traffic",
 256         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 257     ],
 258     'Jetdirect' => [
 259         "HP Jetdirect printing",
 260         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 261     ],
 262     'L2TP' => [
 263         "Layer 2 Tunneling Protocol traffic",
 264         { action => 'PARAM', proto => 'udp', dport => '1701' },
 265         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 266     ],
 267     'LDAP' => [
 268         "Lightweight Directory Access Protocol traffic",
 269         { action => 'PARAM', proto => 'tcp', dport => '389' },
 270     ],
 271     'LDAPS' => [
 272         "Secure Lightweight Directory Access Protocol traffic",
 273         { action => 'PARAM', proto => 'tcp', dport => '636' },
 274     ],
 275     'MSNP' => [
 276         "Microsoft Notification Protocol",
 277         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 278     ],
 279     'MSSQL' => [
 280         "Microsoft SQL Server",
 281         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 282     ],
 283     'Mail' => [
 284         "Mail traffic (SMTP, SMTPS, Submission)",
 285         { action => 'PARAM', proto => 'tcp', dport => '25' },
 286         { action => 'PARAM', proto => 'tcp', dport => '465' },
 287         { action => 'PARAM', proto => 'tcp', dport => '587' },
 288     ],
 289     'Munin' => [
 290         "Munin networked resource monitoring traffic",
 291         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 292     ],
 293     'MySQL' => [
 294         "MySQL server",
 295         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 296     ],
 297     'NNTP' => [
 298         "NNTP traffic (Usenet).",
 299         { action => 'PARAM', proto => 'tcp', dport => '119' },
 300     ],
 301     'NNTPS' => [
 302         "Encrypted NNTP traffic (Usenet)",
 303         { action => 'PARAM', proto => 'tcp', dport => '563' },
 304     ],
 305     'NTP' => [
 306         "Network Time Protocol (ntpd)",
 307         { action => 'PARAM', proto => 'udp', dport => '123' },
 308     ],
 309     'NTPbi' => [
 310         "Bi-directional NTP (for NTP peers)",
 311         { action => 'PARAM', proto => 'udp', dport => '123' },
 312         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 313     ],
 314     'OSPF' => [
 315         "OSPF multicast traffic",
 316         { action => 'PARAM', proto => '89' },
 317     ],
 318     'OpenVPN' => [
 319         "OpenVPN traffic",
 320         { action => 'PARAM', proto => 'udp', dport => '1194' },
 321     ],
 322     'PCA' => [
 323         "Symantec PCAnywere (tm)",
 324         { action => 'PARAM', proto => 'udp', dport => '5632' },
 325         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 326     ],
 327     'POP3' => [
 328         "POP3 traffic",
 329         { action => 'PARAM', proto => 'tcp', dport => '110' },
 330     ],
 331     'POP3S' => [
 332         "Encrypted POP3 traffic",
 333         { action => 'PARAM', proto => 'tcp', dport => '995' },
 334     ],
 335     'PPtP' => [
 336         "Point-to-Point Tunneling Protocol",
 337         { action => 'PARAM', proto => '47' },
 338         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 339         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 340     ],
 341     'Ping' => [
 342         "ICMP echo request",
 343         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 344     ],
 345     'PostgreSQL' => [
 346         "PostgreSQL server",
 347         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 348     ],
 349     'Printer' => [
 350         "Line Printer protocol printing",
 351         { action => 'PARAM', proto => 'tcp', dport => '515' },
 352     ],
 353     'RDP' => [
 354         "Microsoft Remote Desktop Protocol traffic",
 355         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 356     ],
 357     'RIPbi' => [
 358         "Routing Information Protocol (bidirectional)",
 359         { action => 'PARAM', proto => 'udp', dport => '520' },
 360         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 361     ],
 362     'RNDC' => [
 363         "BIND remote management protocol",
 364         { action => 'PARAM', proto => 'tcp', dport => '953' },
 365     ],
 366     'Razor' => [
 367         "Razor Antispam System",
 368         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 369     ],
 370     'Rdate' => [
 371         "Remote time retrieval (rdate)",
 372         { action => 'PARAM', proto => 'tcp', dport => '37' },
 373     ],
 374     'Rsync' => [
 375         "Rsync server",
 376         { action => 'PARAM', proto => 'tcp', dport => '873' },
 377     ],
 378     'SANE' => [
 379         "SANE network scanning",
 380         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 381     ],
 382     'SMB' => [
 383         "Microsoft SMB traffic",
 384         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 385         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 386         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 387         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 388     ],
 389     'SMBBI' => [
 390         "Microsoft SMB traffic (bidirectional)",
 391         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 392         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 393         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 394         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 395         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 396         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 397         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 398         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 399     ],
 400     'SMBswat' => [
 401         "Samba Web Administration Tool",
 402         { action => 'PARAM', proto => 'tcp', dport => '901' },
 403     ],
 404     'SMTP' => [
 405         "Simple Mail Transfer Protocol",
 406         { action => 'PARAM', proto => 'tcp', dport => '25' },
 407     ],
 408     'SMTPS' => [
 409         "Encrypted Simple Mail Transfer Protocol",
 410         { action => 'PARAM', proto => 'tcp', dport => '465' },
 411     ],
 412     'SNMP' => [
 413         "Simple Network Management Protocol",
 414         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 415         { action => 'PARAM', proto => 'tcp', dport => '161' },
 416     ],
 417     'SPAMD' => [
 418         "Spam Assassin SPAMD traffic",
 419         { action => 'PARAM', proto => 'tcp', dport => '783' },
 420     ],
 421     'SSH' => [
 422         "Secure shell traffic",
 423         { action => 'PARAM', proto => 'tcp', dport => '22' },
 424     ],
 425     'SVN' => [
 426         "Subversion server (svnserve)",
 427         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 428     ],
 429     'SixXS' => [
 430         "SixXS IPv6 Deployment and Tunnel Broker",
 431         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 432         { action => 'PARAM', proto => 'udp', dport => '3740' },
 433         { action => 'PARAM', proto => '41' },
 434         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 435     ],
 436     'Squid' => [
 437         "Squid web proxy traffic",
 438         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 439     ],
 440     'Submission' => [
 441         "Mail message submission traffic",
 442         { action => 'PARAM', proto => 'tcp', dport => '587' },
 443     ],
 444     'Syslog' => [
 445         "Syslog protocol (RFC 5424) traffic",
 446         { action => 'PARAM', proto => 'udp', dport => '514' },
 447         { action => 'PARAM', proto => 'tcp', dport => '514' },
 448     ],
 449     'TFTP' => [
 450         "Trivial File Transfer Protocol traffic",
 451         { action => 'PARAM', proto => 'udp', dport => '69' },
 452     ],
 453     'Telnet' => [
 454         "Telnet traffic",
 455         { action => 'PARAM', proto => 'tcp', dport => '23' },
 456     ],
 457     'Telnets' => [
 458         "Telnet over SSL",
 459         { action => 'PARAM', proto => 'tcp', dport => '992' },
 460     ],
 461     'Time' => [
 462         "RFC 868 Time protocol",
 463         { action => 'PARAM', proto => 'tcp', dport => '37' },
 464     ],
 465     'Trcrt' => [
 466         "Traceroute (for up to 30 hops) traffic",
 467         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 468         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 469     ],
 470     'VNC' => [
 471         "VNC traffic for VNC display's 0 - 9",
 472         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 473     ],
 474     'VNCL' => [
 475         "VNC traffic from Vncservers to Vncviewers in listen mode",
 476         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 477     ],
 478     'Web' => [
 479         "WWW traffic (HTTP and HTTPS)",
 480         { action => 'PARAM', proto => 'tcp', dport => '80' },
 481         { action => 'PARAM', proto => 'tcp', dport => '443' },
 482     ],
 483     'Webcache' => [
 484         "Web Cache/Proxy traffic (port 8080)",
 485         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 486     ],
 487     'Webmin' => [
 488         "Webmin traffic",
 489         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 490     ],
 491     'Whois' => [
 492         "Whois (nicname, RFC 3912) traffic",
 493         { action => 'PARAM', proto => 'tcp', dport => '43' },
 494     ],
 495 };
 496
 497 my $pve_fw_parsed_macros;
 498 my $pve_fw_macro_descr;
 499 my $pve_fw_preferred_macro_names = {};
 500
 501 my $pve_std_chains = {
 502     'PVEFW-SET-ACCEPT-MARK' => [
 503         "-j MARK --set-mark 1",
 504     ],
 505     'PVEFW-DropBroadcast' => [
 506         # same as shorewall 'Broadcast'
 507         # simply DROP BROADCAST/MULTICAST/ANYCAST
 508         # we can use this to reduce logging
 509         { action => 'DROP', dsttype => 'BROADCAST' },
 510         { action => 'DROP', dsttype => 'MULTICAST' },
 511         { action => 'DROP', dsttype => 'ANYCAST' },
 512         { action => 'DROP', dest => '224.0.0.0/4' },
 513     ],
 514     'PVEFW-reject' => [
 515         # same as shorewall 'reject'
 516         { action => 'DROP', dsttype => 'BROADCAST' },
 517         { action => 'DROP', source => '224.0.0.0/4' },
 518         { action => 'DROP', proto => 'icmp' },
 519         "-p tcp -j REJECT --reject-with tcp-reset",
 520         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 521         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 522         "-j REJECT --reject-with icmp-host-prohibited",
 523     ],
 524     'PVEFW-Drop' => [
 525         # same as shorewall 'Drop', which is equal to DROP,
 526         # but REJECT/DROP some packages to reduce logging,
 527         # and ACCEPT critical ICMP types
 528         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 529         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 530         { action => 'PVEFW-DropBroadcast' },
 531         # ACCEPT critical ICMP types
 532         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 533         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 534         # Drop packets with INVALID state
 535         "-m conntrack --ctstate INVALID -j DROP",
 536         # Drop Microsoft SMB noise
 537         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 538         { action => 'DROP', proto => 'udp', dport => '137:139'},
 539         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 540         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 541         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 542         # Drop new/NotSyn traffic so that it doesn't get logged
 543         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 544         # Drop DNS replies
 545         { action => 'DROP', proto => 'udp', sport => 53 },
 546     ],
 547     'PVEFW-Reject' => [
 548         # same as shorewall 'Reject', which is equal to Reject,
 549         # but REJECT/DROP some packages to reduce logging,
 550         # and ACCEPT critical ICMP types
 551         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 552         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 553         { action => 'PVEFW-DropBroadcast' },
 554         # ACCEPT critical ICMP types
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 556         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 557         # Drop packets with INVALID state
 558         "-m conntrack --ctstate INVALID -j DROP",
 559         # Drop Microsoft SMB noise
 560         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 561         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 562         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 563         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 564         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 565         # Drop new/NotSyn traffic so that it doesn't get logged
 566         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 567         # Drop DNS replies
 568         { action => 'DROP', proto => 'udp', sport => 53 },
 569     ],
 570     'PVEFW-tcpflags' => [
 571         # same as shorewall tcpflags action.
 572         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 573         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 574         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 575         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 576         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 577         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 578     ],
 579     'PVEFW-smurfs' => [
 580         # same as shorewall smurfs action
 581         # Filter packets for smurfs (packets with a broadcast address as the source).
 582         "-s 0.0.0.0/32 -j RETURN",
 583         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 584         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 585     ],
 586 };
 587
 588 # iptables -p icmp -h
 589 my $icmp_type_names = {
 590     any => 1,
 591     'echo-reply' => 1,
 592     'destination-unreachable' => 1,
 593     'network-unreachable' => 1,
 594     'host-unreachable' => 1,
 595     'protocol-unreachable' => 1,
 596     'port-unreachable' => 1,
 597     'fragmentation-needed' => 1,
 598     'source-route-failed' => 1,
 599     'network-unknown' => 1,
 600     'host-unknown' => 1,
 601     'network-prohibited' => 1,
 602     'host-prohibited' => 1,
 603     'TOS-network-unreachable' => 1,
 604     'TOS-host-unreachable' => 1,
 605     'communication-prohibited' => 1,
 606     'host-precedence-violation' => 1,
 607     'precedence-cutoff' => 1,
 608     'source-quench' => 1,
 609     'redirect' => 1,
 610     'network-redirect' => 1,
 611     'host-redirect' => 1,
 612     'TOS-network-redirect' => 1,
 613     'TOS-host-redirect' => 1,
 614     'echo-request' => 1,
 615     'router-advertisement' => 1,
 616     'router-solicitation' => 1,
 617     'time-exceeded' => 1,
 618     'ttl-zero-during-transit' => 1,
 619     'ttl-zero-during-reassembly' => 1,
 620     'parameter-problem' => 1,
 621     'ip-header-bad' => 1,
 622     'required-option-missing' => 1,
 623     'timestamp-request' => 1,
 624     'timestamp-reply' => 1,
 625     'address-mask-request' => 1,
 626     'address-mask-reply' => 1,
 627 };
 628
 629 sub init_firewall_macros {
 630
 631     $pve_fw_parsed_macros = {};
 632
 633     foreach my $k (keys %$pve_fw_macros) {
 634         my $lc_name = lc($k);
 635         my $macro = $pve_fw_macros->{$k};
 636         if (!ref($macro->[0])) {
 637             $pve_fw_macro_descr->{$k} = shift @$macro;
 638         }
 639         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 640         $pve_fw_parsed_macros->{$k} = $macro;
 641     }
 642 }
 643
 644 init_firewall_macros();
 645
 646 sub get_macros {
 647     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 648 }
 649
 650 my $etc_services;
 651
 652 sub get_etc_services {
 653
 654     return $etc_services if $etc_services;
 655
 656     my $filename = "/etc/services";
 657
 658     my $fh = IO::File->new($filename, O_RDONLY);
 659     if (!$fh) {
 660         warn "unable to read '$filename' - $!\n";
 661         return {};
 662     }
 663
 664     my $services = {};
 665
 666     while (my $line = <$fh>) {
 667         chomp ($line);
 668         next if $line =~m/^#/;
 669         next if ($line =~m/^\s*$/);
 670
 671         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 672             $services->{byid}->{$2}->{name} = $1;
 673             $services->{byid}->{$2}->{port} = $2;
 674             $services->{byid}->{$2}->{$3} = 1;
 675             $services->{byname}->{$1} = $services->{byid}->{$2};
 676         }
 677     }
 678
 679     close($fh);
 680
 681     $etc_services = $services;
 682
 683
 684     return $etc_services;
 685 }
 686
 687 my $etc_protocols;
 688
 689 sub get_etc_protocols {
 690     return $etc_protocols if $etc_protocols;
 691
 692     my $filename = "/etc/protocols";
 693
 694     my $fh = IO::File->new($filename, O_RDONLY);
 695     if (!$fh) {
 696         warn "unable to read '$filename' - $!\n";
 697         return {};
 698     }
 699
 700     my $protocols = {};
 701
 702     while (my $line = <$fh>) {
 703         chomp ($line);
 704         next if $line =~m/^#/;
 705         next if ($line =~m/^\s*$/);
 706
 707         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 708             $protocols->{byid}->{$2}->{name} = $1;
 709             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 710         }
 711     }
 712
 713     close($fh);
 714
 715     $etc_protocols = $protocols;
 716
 717     return $etc_protocols;
 718 }
 719
 720 sub parse_address_list {
 721     my ($str) = @_;
 722
 723     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 724     return if $str =~ m/^${ip_alias_pattern}$/;
 725
 726     my $count = 0;
 727     my $iprange = 0;
 728     foreach my $elem (split(/,/, $str)) {
 729         $count++;
 730         if (!Net::IP->new($elem)) {
 731             my $err = Net::IP::Error();
 732             die "invalid IP address: $err\n";
 733         }
 734         $iprange = 1 if $elem =~ m/-/;
 735     }
 736
 737     die "you can use a range in a list\n" if $iprange && $count > 1;
 738 }
 739
 740 sub parse_port_name_number_or_range {
 741     my ($str) = @_;
 742
 743     my $services = PVE::Firewall::get_etc_services();
 744     my $count = 0;
 745     my $icmp_port = 0;
 746
 747     foreach my $item (split(/,/, $str)) {
 748         $count++;
 749         if ($item =~ m/^(\d+):(\d+)$/) {
 750             my ($port1, $port2) = ($1, $2);
 751             die "invalid port '$port1'\n" if $port1 > 65535;
 752             die "invalid port '$port2'\n" if $port2 > 65535;
 753         } elsif ($item =~ m/^(\d+)$/) {
 754             my $port = $1;
 755             die "invalid port '$port'\n" if $port > 65535;
 756         } else {
 757             if ($icmp_type_names->{$item}) {
 758                 $icmp_port = 1;
 759             } else {
 760                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 761             }
 762         }
 763     }
 764
 765     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 766
 767     return $count;
 768 }
 769
 770 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 771 sub pve_fw_verify_port_spec {
 772    my ($portstr) = @_;
 773
 774    parse_port_name_number_or_range($portstr);
 775
 776    return $portstr;
 777 }
 778
 779 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 780 sub pve_fw_verify_v4addr_spec {
 781    my ($list) = @_;
 782
 783    parse_address_list($list);
 784
 785    return $list;
 786 }
 787
 788 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 789 sub pve_fw_verify_protocol_spec {
 790    my ($proto) = @_;
 791
 792    my $protocols = get_etc_protocols();
 793
 794    die "unknown protocol '$proto'\n" if $proto &&
 795        !(defined($protocols->{byname}->{$proto}) ||
 796          defined($protocols->{byid}->{$proto}));
 797
 798    return $proto;
 799 }
 800
 801
 802 # helper function for API
 803
 804 sub copy_opject_with_digest {
 805     my ($object) = @_;
 806
 807     my $sha = Digest::SHA->new('sha1');
 808
 809     my $res = {};
 810     foreach my $k (sort keys %$object) {
 811         my $v = $object->{$k};
 812         next if !defined($v);
 813         $res->{$k} = $v;
 814         $sha->add($k, ':', $v, "\n");
 815     }
 816
 817     my $digest = $sha->hexdigest;
 818
 819     $res->{digest} = $digest;
 820
 821     return wantarray ? ($res, $digest) : $res;
 822 }
 823
 824 sub copy_list_with_digest {
 825     my ($list) = @_;
 826
 827     my $sha = Digest::SHA->new('sha1');
 828
 829     my $res = [];
 830     foreach my $entry (@$list) {
 831         my $data = {};
 832         foreach my $k (sort keys %$entry) {
 833             my $v = $entry->{$k};
 834             next if !defined($v);
 835             $data->{$k} = $v;
 836             $sha->add($k, ':', $v, "\n");
 837         }
 838         push @$res, $data;
 839     }
 840
 841     my $digest = $sha->hexdigest;
 842
 843     foreach my $entry (@$res) {
 844         $entry->{digest} = $digest;
 845     }
 846
 847     return wantarray ? ($res, $digest) : $res;
 848 }
 849
 850 my $rule_properties = {
 851     pos => {
 852         description => "Update rule at position <pos>.",
 853         type => 'integer',
 854         minimum => 0,
 855         optional => 1,
 856     },
 857     digest => get_standard_option('pve-config-digest'),
 858     type => {
 859         type => 'string',
 860         optional => 1,
 861         enum => ['in', 'out', 'group'],
 862     },
 863     action => {
 864         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 865         type => 'string',
 866         optional => 1,
 867         pattern => $security_group_name_pattern,
 868         maxLength => 20,
 869         minLength => 2,
 870     },
 871     macro => {
 872         type => 'string',
 873         optional => 1,
 874         maxLength => 128,
 875     },
 876     iface => get_standard_option('pve-iface', { optional => 1 }),
 877     source => {
 878         type => 'string', format => 'pve-fw-v4addr-spec',
 879         optional => 1,
 880     },
 881     dest => {
 882         type => 'string', format => 'pve-fw-v4addr-spec',
 883         optional => 1,
 884     },
 885     proto => {
 886         type => 'string', format => 'pve-fw-protocol-spec',
 887         optional => 1,
 888     },
 889     enable => {
 890         type => 'boolean',
 891         optional => 1,
 892     },
 893     sport => {
 894         type => 'string', format => 'pve-fw-port-spec',
 895         optional => 1,
 896     },
 897     dport => {
 898         type => 'string', format => 'pve-fw-port-spec',
 899         optional => 1,
 900     },
 901     comment => {
 902         type => 'string',
 903         optional => 1,
 904     },
 905 };
 906
 907 sub add_rule_properties {
 908     my ($properties) = @_;
 909
 910     foreach my $k (keys %$rule_properties) {
 911         my $h = $rule_properties->{$k};
 912         # copy data, so that we can modify later without side effects
 913         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 914     }
 915
 916     return $properties;
 917 }
 918
 919 sub delete_rule_properties {
 920     my ($rule, $delete_str) = @_;
 921
 922     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 923         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 924             if !defined($rule_properties->{$opt});
 925         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 926             if $opt eq 'type' || $opt eq 'action';
 927         delete $rule->{$opt};
 928     }
 929
 930     return $rule;
 931 }
 932
 933 my $apply_macro = sub {
 934     my ($macro_name, $param, $verify) = @_;
 935
 936     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 937     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 938
 939     my $rules = [];
 940
 941     foreach my $templ (@$macro_rules) {
 942         my $rule = {};
 943         my $param_used = {};
 944         foreach my $k (keys %$templ) {
 945             my $v = $templ->{$k};
 946             if ($v eq 'PARAM') {
 947                 $v = $param->{$k};
 948                 $param_used->{$k} = 1;
 949             } elsif ($v eq 'DEST') {
 950                 $v = $param->{dest};
 951                 $param_used->{dest} = 1;
 952             } elsif ($v eq 'SOURCE') {
 953                 $v = $param->{source};
 954                 $param_used->{source} = 1;
 955             }
 956
 957             if (!defined($v)) {
 958                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 959                 raise_param_exc({ macro => $msg }) if $verify;
 960                 die "$msg\n";
 961             }
 962             $rule->{$k} = $v;
 963         }
 964         foreach my $k (keys %$param) {
 965             next if $k eq 'macro';
 966             next if !defined($param->{$k});
 967             next if $param_used->{$k};
 968             if (defined($rule->{$k})) {
 969                 if ($rule->{$k} ne $param->{$k}) {
 970                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 971                     raise_param_exc({ $k => $msg }) if $verify;
 972                     die "$msg\n";
 973                 }
 974             } else {
 975                 $rule->{$k} = $param->{$k};
 976             }
 977         }
 978         push @$rules, $rule;
 979     }
 980
 981     return $rules;
 982 };
 983
 984 sub verify_rule {
 985     my ($rule, $allow_groups) = @_;
 986
 987     my $type = $rule->{type};
 988
 989     raise_param_exc({ type => "missing property"}) if !$type;
 990     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 991
 992     if ($type eq  'in' || $type eq 'out') {
 993         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 994             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 995     } elsif ($type eq 'group') {
 996         raise_param_exc({ type => "security groups not allowed"})
 997             if !$allow_groups;
 998         raise_param_exc({ action => "invalid characters in security group name"})
 999             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
1000     } else {
1001         raise_param_exc({ type => "unknown rule type '$type'"});
1002     }
1003
1004     # fixme: verify $rule->{iface}?
1005
1006     if ($rule->{macro}) {
1007         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1008         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1009         $rule->{macro} = $preferred_name;
1010     }
1011
1012     if ($rule->{dport}) {
1013         eval { parse_port_name_number_or_range($rule->{dport}); };
1014         raise_param_exc({ dport => $@ }) if $@;
1015     }
1016
1017     if ($rule->{sport}) {
1018         eval { parse_port_name_number_or_range($rule->{sport}); };
1019         raise_param_exc({ sport => $@ }) if $@;
1020     }
1021
1022     if ($rule->{source}) {
1023         eval { parse_address_list($rule->{source}); };
1024         raise_param_exc({ source => $@ }) if $@;
1025     }
1026
1027     if ($rule->{dest}) {
1028         eval { parse_address_list($rule->{dest}); };
1029         raise_param_exc({ dest => $@ }) if $@;
1030     }
1031
1032     if ($rule->{macro}) {
1033         &$apply_macro($rule->{macro}, $rule, 1);
1034     }
1035
1036     return $rule;
1037 }
1038
1039 sub copy_rule_data {
1040     my ($rule, $param) = @_;
1041
1042     foreach my $k (keys %$rule_properties) {
1043         if (defined(my $v = $param->{$k})) {
1044             if ($v eq '' || $v eq '-') {
1045                 delete $rule->{$k};
1046             } else {
1047                 $rule->{$k} = $v;
1048             }
1049         } else {
1050             delete $rule->{$k};
1051         }
1052     }
1053
1054     # verify rule now
1055
1056     return $rule;
1057 }
1058
1059 # core functions
1060 my $bridge_firewall_enabled = 0;
1061
1062 sub enable_bridge_firewall {
1063
1064     return if $bridge_firewall_enabled; # only once
1065
1066     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1067     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1068
1069     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1070     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1071
1072     $bridge_firewall_enabled = 1;
1073 }
1074
1075 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1076
1077 sub iptables_restore_cmdlist {
1078     my ($cmdlist) = @_;
1079
1080     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1081 }
1082
1083 sub ipset_restore_cmdlist {
1084     my ($cmdlist) = @_;
1085
1086     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1087 }
1088
1089 sub iptables_get_chains {
1090
1091     my $res = {};
1092
1093     # check what chains we want to track
1094     my $is_pvefw_chain = sub {
1095         my $name = shift;
1096
1097         return 1 if $name =~ m/^PVEFW-\S+$/;
1098
1099         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1100
1101         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1102
1103         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1104
1105         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1106         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1107
1108         return undef;
1109     };
1110
1111     my $table = '';
1112
1113     my $hooks = {};
1114
1115     my $parser = sub {
1116         my $line = shift;
1117
1118         return if $line =~ m/^#/;
1119         return if $line =~ m/^\s*$/;
1120
1121         if ($line =~ m/^\*(\S+)$/) {
1122             $table = $1;
1123             return;
1124         }
1125
1126         return if $table ne 'filter';
1127
1128         if ($line =~ m/^:(\S+)\s/) {
1129             my $chain = $1;
1130             return if !&$is_pvefw_chain($chain);
1131             $res->{$chain} = "unknown";
1132         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1133             my ($chain, $sig) = ($1, $2);
1134             return if !&$is_pvefw_chain($chain);
1135             $res->{$chain} = $sig;
1136         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1137             $hooks->{$1} = 1;
1138         } else {
1139             # simply ignore the rest
1140             return;
1141         }
1142     };
1143
1144     run_command("/sbin/iptables-save", outfunc => $parser);
1145
1146     return wantarray ? ($res, $hooks) : $res;
1147 }
1148
1149 sub iptables_chain_digest {
1150     my ($rules) = @_;
1151     my $digest = Digest::SHA->new('sha1');
1152     foreach my $rule (@$rules) { # order is important
1153         $digest->add($rule);
1154     }
1155     return $digest->b64digest;
1156 }
1157
1158 sub ipset_chain_digest {
1159     my ($rules) = @_;
1160
1161     my $digest = Digest::SHA->new('sha1');
1162     foreach my $rule (sort @$rules) { # note: sorted
1163         $digest->add($rule);
1164     }
1165     return $digest->b64digest;
1166 }
1167
1168 sub ipset_get_chains {
1169
1170     my $res = {};
1171     my $chains = {};
1172
1173     my $parser = sub {
1174         my $line = shift;
1175
1176         return if $line =~ m/^#/;
1177         return if $line =~ m/^\s*$/;
1178         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1179             my $chain = $1;
1180             $line =~ s/\s+$//; # delete trailing white space
1181             push @{$chains->{$chain}}, $line;
1182         } else {
1183             # simply ignore the rest
1184             return;
1185         }
1186     };
1187
1188     run_command("/usr/sbin/ipset save", outfunc => $parser);
1189
1190     # compute digest for each chain
1191     foreach my $chain (keys %$chains) {
1192         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1193     }
1194
1195     return $res;
1196 }
1197
1198 sub ruleset_generate_cmdstr {
1199     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1200
1201     return if defined($rule->{enable}) && !$rule->{enable};
1202
1203     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1204
1205     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1206     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1207
1208     my @cmd = ();
1209
1210     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1211     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1212
1213     my $source = $rule->{source};
1214     my $dest = $rule->{dest};
1215
1216     if ($source) {
1217         if ($source =~ m/^\+/) {
1218             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1219                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1220                 push @cmd, "-m set --match-set PVEFW-$1 src";
1221             } else {
1222                 die "invalid security group name '$source'\n";
1223             }
1224         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1225             my $alias = lc($source);
1226             my $e = $cluster_conf->{aliases}->{$alias};
1227             die "no such alias $source\n" if !$e;
1228             push @cmd, "-s $e->{cidr}";
1229         } elsif ($source =~ m/\-/){
1230             push @cmd, "-m iprange --src-range $source";
1231
1232         } else {
1233             push @cmd, "-s $source";
1234         }
1235     }
1236
1237     if ($dest) {
1238         if ($dest =~ m/^\+/) {
1239             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1240                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1241                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1242             } else {
1243                 die "invalid security group name '$dest'\n";
1244             }
1245         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1246             my $alias = lc($source);
1247             my $e = $cluster_conf->{aliases}->{$alias};
1248             die "no such alias $dest" if !$e;
1249             push @cmd, "-d $e->{cidr}";
1250         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1251             push @cmd, "-m iprange --dst-range $dest";
1252
1253         } else {
1254             push @cmd, "-d $dest";
1255         }
1256     }
1257
1258     if ($rule->{proto}) {
1259         push @cmd, "-p $rule->{proto}";
1260
1261         my $multiport = 0;
1262         $multiport++ if $nbdport > 1;
1263         $multiport++ if $nbsport > 1;
1264
1265         push @cmd, "--match multiport" if $multiport;
1266
1267         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1268             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1269
1270         if ($rule->{dport}) {
1271             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1272                 # Note: we use dport to store --icmp-type
1273                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1274                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1275             } else {
1276                 if ($nbdport > 1) {
1277                     if ($multiport == 2) {
1278                         push @cmd,  "--ports $rule->{dport}";
1279                     } else {
1280                         push @cmd, "--dports $rule->{dport}";
1281                     }
1282                 } else {
1283                     push @cmd, "--dport $rule->{dport}";
1284                 }
1285             }
1286         }
1287
1288         if ($rule->{sport}) {
1289             if ($nbsport > 1) {
1290                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1291             } else {
1292                 push @cmd, "--sport $rule->{sport}";
1293             }
1294         }
1295     } elsif ($rule->{dport} || $rule->{sport}) {
1296         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1297         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1298     }
1299
1300     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1301
1302     if (my $action = $rule->{action}) {
1303         $action = $actions->{$action} if defined($actions->{$action});
1304         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1305         push @cmd, $goto ? "-g $action" : "-j $action";
1306     }
1307
1308     return scalar(@cmd) ? join(' ', @cmd) : undef;
1309 }
1310
1311 sub ruleset_generate_rule {
1312     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1313
1314     my $rules;
1315
1316     if ($rule->{macro}) {
1317         $rules = &$apply_macro($rule->{macro}, $rule);
1318     } else {
1319         $rules = [ $rule ];
1320     }
1321
1322     # update all or nothing
1323
1324     my @cmds = ();
1325     foreach my $tmp (@$rules) {
1326         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1327             push @cmds, $cmdstr;
1328         }
1329     }
1330
1331     foreach my $cmdstr (@cmds) {
1332         ruleset_addrule($ruleset, $chain, $cmdstr);
1333     }
1334 }
1335
1336 sub ruleset_generate_rule_insert {
1337     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1338
1339     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1340
1341     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1342         ruleset_insertrule($ruleset, $chain, $cmdstr);
1343     }
1344 }
1345
1346 sub ruleset_create_chain {
1347     my ($ruleset, $chain) = @_;
1348
1349     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1350     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1351
1352     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1353
1354     $ruleset->{$chain} = [];
1355 }
1356
1357 sub ruleset_chain_exist {
1358     my ($ruleset, $chain) = @_;
1359
1360     return $ruleset->{$chain} ? 1 : undef;
1361 }
1362
1363 sub ruleset_addrule {
1364    my ($ruleset, $chain, $rule) = @_;
1365
1366    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1367
1368    push @{$ruleset->{$chain}}, "-A $chain $rule";
1369 }
1370
1371 sub ruleset_insertrule {
1372    my ($ruleset, $chain, $rule) = @_;
1373
1374    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1375
1376    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1377 }
1378
1379 sub get_log_rule_base {
1380     my ($chain, $vmid, $msg, $loglevel) = @_;
1381
1382     die "internal error - no log level" if !defined($loglevel);
1383
1384     $vmid = 0 if !defined($vmid);
1385
1386     # Note: we use special format for prefix to pass further
1387     # info to log daemon (VMID, LOGVELEL and CHAIN)
1388
1389     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1390 }
1391
1392 sub ruleset_addlog {
1393     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1394
1395     return if !defined($loglevel);
1396
1397     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1398
1399     $logrule = "$rule $logrule" if defined($rule);
1400
1401     ruleset_addrule($ruleset, $chain, $logrule);
1402 }
1403
1404 sub ruleset_add_chain_policy {
1405     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1406
1407     if ($policy eq 'ACCEPT') {
1408
1409         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1410                               { ACCEPT =>  $accept_action});
1411
1412     } elsif ($policy eq 'DROP') {
1413
1414         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1415
1416         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1417
1418         ruleset_addrule($ruleset, $chain, "-j DROP");
1419     } elsif ($policy eq 'REJECT') {
1420         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1421
1422         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1423
1424         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1425     } else {
1426         # should not happen
1427         die "internal error: unknown policy '$policy'";
1428     }
1429 }
1430
1431 sub ruleset_create_vm_chain {
1432     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1433
1434     ruleset_create_chain($ruleset, $chain);
1435     my $accept = generate_nfqueue($options);
1436
1437     if (!(defined($host_options->{nosmurfs}) && $host_options->{nosmurfs} == 0)) {
1438         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1439     }
1440
1441     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1442         if ($direction eq 'OUT') {
1443             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1444                                                       proto => 'udp', sport => 68, dport => 67 });
1445         } else {
1446             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1447                                                       proto => 'udp', sport => 67, dport => 68 });
1448         }
1449     }
1450
1451     if ($host_options->{tcpflags}) {
1452         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1453     }
1454
1455     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1456     if ($direction eq 'OUT') {
1457         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1458     } else {
1459         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1460     }
1461
1462     if ($direction eq 'OUT') {
1463         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1464             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1465         }
1466         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1467     }
1468 }
1469
1470 sub ruleset_generate_vm_rules {
1471     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1472
1473     my $lc_direction = lc($direction);
1474
1475     my $in_accept = generate_nfqueue($options);
1476
1477     foreach my $rule (@$rules) {
1478         next if $rule->{iface} && $rule->{iface} ne $netid;
1479         next if !$rule->{enable};
1480         if ($rule->{type} eq 'group') {
1481             my $group_chain = "GROUP-$rule->{action}-$direction";
1482             if(!ruleset_chain_exist($ruleset, $group_chain)){
1483                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1484             }
1485             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1486             if ($direction eq 'OUT'){
1487                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1488             }else{
1489                 my $accept = generate_nfqueue($options);
1490                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1491             }
1492
1493         } else {
1494             next if $rule->{type} ne $lc_direction;
1495             eval {
1496                 if ($direction eq 'OUT') {
1497                     ruleset_generate_rule($ruleset, $chain, $rule,
1498                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1499                                           undef, $cluster_conf);
1500                 } else {
1501                     ruleset_generate_rule($ruleset, $chain, $rule,
1502                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1503                                           undef, $cluster_conf);
1504                 }
1505             };
1506             warn $@ if $@;
1507         }
1508     }
1509 }
1510
1511 sub generate_nfqueue {
1512     my ($options) = @_;
1513
1514     if ($options->{ips}) {
1515         my $action = "NFQUEUE";
1516         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1517             if (defined($3) && defined($1)) {
1518                 $action .= " --queue-balance $1:$3";
1519             } elsif (defined($1)) {
1520                 $action .= " --queue-num $1";
1521             }
1522         }
1523         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1524         return $action;
1525     } else {
1526         return "ACCEPT";
1527     }
1528 }
1529
1530 sub ruleset_generate_vm_ipsrules {
1531     my ($ruleset, $options, $direction, $iface) = @_;
1532
1533     if ($options->{ips} && $direction eq 'IN') {
1534         my $nfqueue = generate_nfqueue($options);
1535
1536         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1537             ruleset_create_chain($ruleset, "PVEFW-IPS");
1538         }
1539
1540         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1541     }
1542 }
1543
1544 sub generate_venet_rules_direction {
1545     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1546
1547     parse_address_list($ip); # make sure we have a valid $ip list
1548
1549     my $lc_direction = lc($direction);
1550
1551     my $rules = $vmfw_conf->{rules};
1552
1553     my $options = $vmfw_conf->{options};
1554     my $hostfw_options = $vmfw_conf->{options};
1555     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1556
1557     my $chain = "venet0-$vmid-$direction";
1558
1559     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1560
1561     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1562
1563     # implement policy
1564     my $policy;
1565
1566     if ($direction eq 'OUT') {
1567         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1568     } else {
1569         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1570     }
1571
1572     my $accept = generate_nfqueue($options);
1573     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1574     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1575
1576     # plug into FORWARD, INPUT and OUTPUT chain
1577     if ($direction eq 'OUT') {
1578         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1579             action => $chain,
1580             source => $ip,
1581             iface_in => 'venet0'});
1582
1583         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1584             action => $chain,
1585             source => $ip,
1586             iface_in => 'venet0'});
1587     } else {
1588         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1589             action => $chain,
1590             dest => $ip,
1591             iface_out => 'venet0'});
1592
1593         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1594             action => $chain,
1595             dest => $ip,
1596             iface_out => 'venet0'});
1597     }
1598 }
1599
1600 sub generate_tap_rules_direction {
1601     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1602
1603     my $lc_direction = lc($direction);
1604
1605     my $rules = $vmfw_conf->{rules};
1606
1607     my $options = $vmfw_conf->{options};
1608     my $hostfw_options = $hostfw_conf->{options};
1609     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1610
1611     my $tapchain = "$iface-$direction";
1612
1613     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1614
1615     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1616
1617     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1618
1619     # implement policy
1620     my $policy;
1621
1622     if ($direction eq 'OUT') {
1623         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1624     } else {
1625         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1626     }
1627
1628     my $accept = generate_nfqueue($options);
1629     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1630     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1631
1632     # plug the tap chain to bridge chain
1633     if ($direction eq 'IN') {
1634         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1635                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1636     } else {
1637         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1638                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1639     }
1640 }
1641
1642 sub enable_host_firewall {
1643     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1644
1645     my $options = $hostfw_conf->{options};
1646     my $cluster_options = $cluster_conf->{options};
1647     my $rules = $hostfw_conf->{rules};
1648     my $cluster_rules = $cluster_conf->{rules};
1649
1650     # host inbound firewall
1651     my $chain = "PVEFW-HOST-IN";
1652     ruleset_create_chain($ruleset, $chain);
1653
1654     my $loglevel = get_option_log_level($options, "log_level_in");
1655
1656     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1657         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1658     }
1659
1660     if ($options->{tcpflags}) {
1661         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1662     }
1663
1664     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1665     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1666     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1667     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1668     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1669     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1670
1671     # we use RETURN because we need to check also tap rules
1672     my $accept_action = 'RETURN';
1673
1674     # add host rules first, so that cluster wide rules can be overwritten
1675     foreach my $rule (@$rules, @$cluster_rules) {
1676         next if $rule->{type} ne 'in';
1677         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1678     }
1679
1680     # implement input policy
1681     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1682     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1683
1684     # host outbound firewall
1685     $chain = "PVEFW-HOST-OUT";
1686     ruleset_create_chain($ruleset, $chain);
1687
1688     $loglevel = get_option_log_level($options, "log_level_out");
1689
1690     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1691     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1692     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1693     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1694     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1695     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1696
1697     # we use RETURN because we may want to check other thigs later
1698     $accept_action = 'RETURN';
1699
1700     # add host rules first, so that cluster wide rules can be overwritten
1701     foreach my $rule (@$rules, @$cluster_rules) {
1702         next if $rule->{type} ne 'out';
1703         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1704     }
1705
1706     # implement output policy
1707     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1708     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1709
1710     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1711     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1712 }
1713
1714 sub generate_group_rules {
1715     my ($ruleset, $cluster_conf, $group) = @_;
1716     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1717
1718     my $rules = $cluster_conf->{groups}->{$group};
1719
1720     my $chain = "GROUP-${group}-IN";
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 $rule->{type} ne 'in';
1727         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1728     }
1729
1730     $chain = "GROUP-${group}-OUT";
1731
1732     ruleset_create_chain($ruleset, $chain);
1733     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1734
1735     foreach my $rule (@$rules) {
1736         next if $rule->{type} ne 'out';
1737         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1738         # check also other tap rules later
1739         ruleset_generate_rule($ruleset, $chain, $rule,
1740                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1741     }
1742 }
1743
1744 my $MAX_NETS = 32;
1745 my $valid_netdev_names = {};
1746 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1747     $valid_netdev_names->{"net$i"} = 1;
1748 }
1749
1750 sub parse_fw_rule {
1751     my ($line, $need_iface, $allow_groups) = @_;
1752
1753     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1754
1755     # we can add single line comments to the end of the rule
1756     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1757
1758     # we can disable a rule when prefixed with '|'
1759     my $enable = 1;
1760
1761     $enable = 0 if $line =~ s/^\|//;
1762
1763     my @data = split(/\s+/, $line);
1764     my $expected_elements = $need_iface ? 8 : 7;
1765
1766     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1767
1768     if ($need_iface) {
1769         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1770     } else {
1771         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1772     }
1773
1774     die "incomplete rule\n" if ! ($type && $action);
1775
1776     my $macro;
1777
1778     $type = lc($type);
1779
1780     if ($type eq  'in' || $type eq 'out') {
1781         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1782             # OK
1783         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1784             $action = $2;
1785             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1786             die "unknown macro '$1'\n" if !$preferred_name;
1787             $macro = $preferred_name;
1788         } else {
1789             die "unknown action '$action'\n";
1790         }
1791     } elsif ($type eq 'group') {
1792         die "wrong number of rule elements\n" if scalar(@data) != 3;
1793         die "groups disabled\n" if !$allow_groups;
1794
1795         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1796     } else {
1797         die "unknown rule type '$type'\n";
1798     }
1799
1800     if ($need_iface) {
1801         $iface = undef if $iface && $iface eq '-';
1802     }
1803
1804     $proto = undef if $proto && $proto eq '-';
1805     pve_fw_verify_protocol_spec($proto) if $proto;
1806
1807     $source = undef if $source && $source eq '-';
1808     $dest = undef if $dest && $dest eq '-';
1809
1810     $dport = undef if $dport && $dport eq '-';
1811     $sport = undef if $sport && $sport eq '-';
1812
1813     parse_port_name_number_or_range($dport) if defined($dport);
1814     parse_port_name_number_or_range($sport) if defined($sport);
1815
1816     parse_address_list($source) if $source;
1817     parse_address_list($dest) if $dest;
1818
1819     return {
1820         type => $type,
1821         enable => $enable,
1822         comment => $comment,
1823         action => $action,
1824         macro => $macro,
1825         iface => $iface,
1826         source => $source,
1827         dest => $dest,
1828         proto => $proto,
1829         dport => $dport,
1830         sport => $sport,
1831     };
1832 }
1833
1834 sub parse_vmfw_option {
1835     my ($line) = @_;
1836
1837     my ($opt, $value);
1838
1839     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1840
1841     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1842         $opt = lc($1);
1843         $value = int($2);
1844     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1845         $opt = lc($1);
1846         $value = $2 ? lc($3) : '';
1847     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1848         $opt = lc($1);
1849         $value = uc($3);
1850     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1851         $opt = lc($1);
1852         $value = $2;
1853     } else {
1854         chomp $line;
1855         die "can't parse option '$line'\n"
1856     }
1857
1858     return ($opt, $value);
1859 }
1860
1861 sub parse_hostfw_option {
1862     my ($line) = @_;
1863
1864     my ($opt, $value);
1865
1866     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1867
1868     if ($line =~ m/^(enable|nosmurfs|tcpflags|optimize):\s*(0|1)\s*$/i) {
1869         $opt = lc($1);
1870         $value = int($2);
1871     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1872         $opt = lc($1);
1873         $value = $2 ? lc($3) : '';
1874     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1875         $opt = lc($1);
1876         $value = int($2);
1877     } else {
1878         chomp $line;
1879         die "can't parse option '$line'\n"
1880     }
1881
1882     return ($opt, $value);
1883 }
1884
1885 sub parse_clusterfw_option {
1886     my ($line) = @_;
1887
1888     my ($opt, $value);
1889
1890     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1891         $opt = lc($1);
1892         $value = int($2);
1893     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1894         $opt = lc($1);
1895         $value = uc($3);
1896     } else {
1897         chomp $line;
1898         die "can't parse option '$line'\n"
1899     }
1900
1901     return ($opt, $value);
1902 }
1903
1904 sub parse_clusterfw_alias {
1905     my ($line) = @_;
1906
1907     # we can add single line comments to the end of the line
1908     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1909
1910     if ($line =~ m/^(\S+)\s(\S+)$/) {
1911         my ($name, $cidr) = ($1, $2);
1912         $cidr =~ s|/32$||;
1913         pve_verify_ipv4_or_cidr($cidr);
1914         my $data = {
1915             name => $name,
1916             cidr => $cidr,
1917         };
1918         $data->{comment} = $comment  if $comment;
1919         return $data;
1920     }
1921
1922     return undef;
1923 }
1924
1925 sub parse_vm_fw_rules {
1926     my ($filename, $fh) = @_;
1927
1928     my $res = { rules => [], options => {}};
1929
1930     my $section;
1931
1932     while (defined(my $line = <$fh>)) {
1933         next if $line =~ m/^#/;
1934         next if $line =~ m/^\s*$/;
1935
1936         my $linenr = $fh->input_line_number();
1937         my $prefix = "$filename (line $linenr)";
1938
1939         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1940             $section = lc($1);
1941             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1942             next;
1943         }
1944         if (!$section) {
1945             warn "$prefix: skip line - no section";
1946             next;
1947         }
1948
1949         next if !$res->{$section}; # skip undefined section
1950
1951         if ($section eq 'options') {
1952             eval {
1953                 my ($opt, $value) = parse_vmfw_option($line);
1954                 $res->{options}->{$opt} = $value;
1955             };
1956             warn "$prefix: $@" if $@;
1957             next;
1958         }
1959
1960         my $rule;
1961         eval { $rule = parse_fw_rule($line, 1, 1); };
1962         if (my $err = $@) {
1963             warn "$prefix: $err";
1964             next;
1965         }
1966
1967         push @{$res->{$section}}, $rule;
1968     }
1969
1970     return $res;
1971 }
1972
1973 sub parse_host_fw_rules {
1974     my ($filename, $fh) = @_;
1975
1976     my $res = { rules => [], options => {}};
1977
1978     my $section;
1979
1980     while (defined(my $line = <$fh>)) {
1981         next if $line =~ m/^#/;
1982         next if $line =~ m/^\s*$/;
1983
1984         my $linenr = $fh->input_line_number();
1985         my $prefix = "$filename (line $linenr)";
1986
1987         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1988             $section = lc($1);
1989             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1990             next;
1991         }
1992         if (!$section) {
1993             warn "$prefix: skip line - no section";
1994             next;
1995         }
1996
1997         next if !$res->{$section}; # skip undefined section
1998
1999         if ($section eq 'options') {
2000             eval {
2001                 my ($opt, $value) = parse_hostfw_option($line);
2002                 $res->{options}->{$opt} = $value;
2003             };
2004             warn "$prefix: $@" if $@;
2005             next;
2006         }
2007
2008         my $rule;
2009         eval { $rule = parse_fw_rule($line, 1, 1); };
2010         if (my $err = $@) {
2011             warn "$prefix: $err";
2012             next;
2013         }
2014
2015         push @{$res->{$section}}, $rule;
2016     }
2017
2018     return $res;
2019 }
2020
2021 sub parse_cluster_fw_rules {
2022     my ($filename, $fh) = @_;
2023
2024     my $section;
2025     my $group;
2026
2027     my $res = {
2028         rules => [],
2029         options => {},
2030         aliases => {},
2031         groups => {},
2032         group_comments => {},
2033         ipset => {} ,
2034         ipset_comments => {},
2035     };
2036
2037     while (defined(my $line = <$fh>)) {
2038         next if $line =~ m/^#/;
2039         next if $line =~ m/^\s*$/;
2040
2041         my $linenr = $fh->input_line_number();
2042         my $prefix = "$filename (line $linenr)";
2043
2044         if ($line =~ m/^\[options\]$/i) {
2045             $section = 'options';
2046             next;
2047         }
2048
2049         if ($line =~ m/^\[aliases\]$/i) {
2050             $section = 'aliases';
2051             next;
2052         }
2053
2054         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2055             $section = 'groups';
2056             $group = lc($1);
2057             my $comment = $2;
2058             $res->{$section}->{$group} = [];
2059             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2060                 if $comment;
2061             next;
2062         }
2063
2064         if ($line =~ m/^\[rules\]$/i) {
2065             $section = 'rules';
2066             next;
2067         }
2068
2069         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2070             $section = 'ipset';
2071             $group = lc($1);
2072             my $comment = $2;
2073             $res->{$section}->{$group} = [];
2074             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2075                 if $comment;
2076             next;
2077         }
2078
2079         if (!$section) {
2080             warn "$prefix: skip line - no section\n";
2081             next;
2082         }
2083
2084         if ($section eq 'options') {
2085             eval {
2086                 my ($opt, $value) = parse_clusterfw_option($line);
2087                 $res->{options}->{$opt} = $value;
2088             };
2089             warn "$prefix: $@" if $@;
2090         } elsif ($section eq 'aliases') {
2091             eval {
2092                 my $data = parse_clusterfw_alias($line);
2093                 $res->{aliases}->{lc($data->{name})} = $data;
2094             };
2095             warn "$prefix: $@" if $@;
2096         } elsif ($section eq 'rules') {
2097             my $rule;
2098             eval { $rule = parse_fw_rule($line, 1, 1); };
2099             if (my $err = $@) {
2100                 warn "$prefix: $err";
2101                 next;
2102             }
2103             push @{$res->{$section}}, $rule;
2104         } elsif ($section eq 'groups') {
2105             my $rule;
2106             eval { $rule = parse_fw_rule($line, 0, 0); };
2107             if (my $err = $@) {
2108                 warn "$prefix: $err";
2109                 next;
2110             }
2111             push @{$res->{$section}->{$group}}, $rule;
2112         } elsif ($section eq 'ipset') {
2113             # we can add single line comments to the end of the rule
2114             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2115
2116             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2117             my $nomatch = $1;
2118             my $cidr = $2;
2119
2120             if($cidr !~ m/^${ip_alias_pattern}$/) {
2121                 $cidr =~ s|/32$||;
2122
2123                 eval { pve_verify_ipv4_or_cidr($cidr); };
2124                 if (my $err = $@) {
2125                     warn "$prefix: $cidr - $err";
2126                     next;
2127                 }
2128             }
2129
2130             my $entry = { cidr => $cidr };
2131             $entry->{nomatch} = 1 if $nomatch;
2132             $entry->{comment} = $comment if $comment;
2133
2134             push @{$res->{$section}->{$group}}, $entry;
2135         }
2136     }
2137
2138     return $res;
2139 }
2140
2141 sub run_locked {
2142     my ($code, @param) = @_;
2143
2144     my $timeout = 10;
2145
2146     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2147
2148     die $@ if $@;
2149
2150     return $res;
2151 }
2152
2153 sub read_local_vm_config {
2154
2155     my $openvz = {};
2156     my $qemu = {};
2157
2158     my $vmdata = { openvz => $openvz, qemu => $qemu };
2159
2160     my $vmlist = PVE::Cluster::get_vmlist();
2161     return $vmdata if !$vmlist || !$vmlist->{ids};
2162     my $ids = $vmlist->{ids};
2163
2164     foreach my $vmid (keys %$ids) {
2165         next if !$vmid; # skip VE0
2166         my $d = $ids->{$vmid};
2167         next if !$d->{node} || $d->{node} ne $nodename;
2168         next if !$d->{type};
2169         if ($d->{type} eq 'openvz') {
2170             if ($have_pve_manager) {
2171                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2172                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2173                     $openvz->{$vmid} = $conf;
2174                 }
2175             }
2176         } elsif ($d->{type} eq 'qemu') {
2177             if ($have_qemu_server) {
2178                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2179                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2180                     $qemu->{$vmid} = $conf;
2181                 }
2182             }
2183         }
2184     }
2185
2186     return $vmdata;
2187 };
2188
2189 sub load_vmfw_conf {
2190     my ($vmid) = @_;
2191
2192     my $vmfw_conf = {};
2193
2194     my $filename = "/etc/pve/firewall/$vmid.fw";
2195     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2196         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2197     }
2198
2199     return $vmfw_conf;
2200 }
2201
2202 my $format_rules = sub {
2203     my ($rules, $need_iface) = @_;
2204
2205     my $raw = '';
2206
2207     foreach my $rule (@$rules) {
2208         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2209             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2210             $raw .= uc($rule->{type});
2211             if ($rule->{macro}) {
2212                 $raw .= " $rule->{macro}($rule->{action})";
2213             } else {
2214                 $raw .= " " . $rule->{action};
2215             }
2216             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2217
2218             if ($rule->{type} ne  'group')  {
2219                 $raw .= " " . ($rule->{source} || '-');
2220                 $raw .= " " . ($rule->{dest} || '-');
2221                 $raw .= " " . ($rule->{proto} || '-');
2222                 $raw .= " " . ($rule->{dport} || '-');
2223                 $raw .= " " . ($rule->{sport} || '-');
2224             }
2225
2226             $raw .= " # " . encode('utf8', $rule->{comment})
2227                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2228             $raw .= "\n";
2229         } else {
2230             die "unknown rule type '$rule->{type}'";
2231         }
2232     }
2233
2234     return $raw;
2235 };
2236
2237 my $format_options = sub {
2238     my ($options) = @_;
2239
2240     my $raw = '';
2241
2242     $raw .= "[OPTIONS]\n\n";
2243     foreach my $opt (keys %$options) {
2244         $raw .= "$opt: $options->{$opt}\n";
2245     }
2246     $raw .= "\n";
2247
2248     return $raw;
2249 };
2250
2251 my $format_aliases = sub {
2252     my ($aliases) = @_;
2253
2254     my $raw = '';
2255
2256     $raw .= "[ALIASES]\n\n";
2257     foreach my $k (keys %$aliases) {
2258         my $e = $aliases->{$k};
2259         $raw .= "$e->{name} $e->{cidr}";
2260         $raw .= " # " . encode('utf8', $e->{comment})
2261             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2262         $raw .= "\n";
2263     }
2264     $raw .= "\n";
2265
2266     return $raw;
2267 };
2268
2269 my $format_ipset = sub {
2270     my ($options) = @_;
2271
2272     my $raw = '';
2273
2274     my $nethash = {};
2275     foreach my $entry (@$options) {
2276         $nethash->{$entry->{cidr}} = $entry;
2277     }
2278
2279     foreach my $cidr (sort keys %$nethash) {
2280         my $entry = $nethash->{$cidr};
2281         my $line = $entry->{nomatch} ? '!' : '';
2282         $line .= $entry->{cidr};
2283         $line .= " # " . encode('utf8', $entry->{comment})
2284             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2285         $raw .= "$line\n";
2286     }
2287
2288     return $raw;
2289 };
2290
2291 sub save_vmfw_conf {
2292     my ($vmid, $vmfw_conf) = @_;
2293
2294     my $raw = '';
2295
2296     my $options = $vmfw_conf->{options};
2297     $raw .= &$format_options($options) if scalar(keys %$options);
2298
2299     my $rules = $vmfw_conf->{rules} || [];
2300     if (scalar(@$rules)) {
2301         $raw .= "[RULES]\n\n";
2302         $raw .= &$format_rules($rules, 1);
2303         $raw .= "\n";
2304     }
2305
2306     my $filename = "/etc/pve/firewall/$vmid.fw";
2307     PVE::Tools::file_set_contents($filename, $raw);
2308 }
2309
2310 sub read_vm_firewall_configs {
2311     my ($vmdata) = @_;
2312     my $vmfw_configs = {};
2313
2314     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2315         my $vmfw_conf = load_vmfw_conf($vmid);
2316         next if !$vmfw_conf->{options}; # skip if file does not exists
2317         $vmfw_configs->{$vmid} = $vmfw_conf;
2318     }
2319
2320     return $vmfw_configs;
2321 }
2322
2323 sub get_option_log_level {
2324     my ($options, $k) = @_;
2325
2326     my $v = $options->{$k};
2327     $v = $default_log_level if !defined($v);
2328
2329     return undef if $v eq '' || $v eq 'nolog';
2330
2331     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2332
2333     return $v if ($v >= 0) && ($v <= 7);
2334
2335     warn "unknown log level ($k = '$v')\n";
2336
2337     return undef;
2338 }
2339
2340 sub generate_std_chains {
2341     my ($ruleset, $options) = @_;
2342
2343     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2344
2345     # same as shorewall smurflog.
2346     my $chain = 'PVEFW-smurflog';
2347     $pve_std_chains->{$chain} = [];
2348
2349     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2350     push @{$pve_std_chains->{$chain}}, "-j DROP";
2351
2352     # same as shorewall logflags action.
2353     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2354     $chain = 'PVEFW-logflags';
2355     $pve_std_chains->{$chain} = [];
2356
2357     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2358     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2359     push @{$pve_std_chains->{$chain}}, "-j DROP";
2360
2361     foreach my $chain (keys %$pve_std_chains) {
2362         ruleset_create_chain($ruleset, $chain);
2363         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2364             if (ref($rule)) {
2365                 ruleset_generate_rule($ruleset, $chain, $rule);
2366             } else {
2367                 ruleset_addrule($ruleset, $chain, $rule);
2368             }
2369         }
2370     }
2371 }
2372
2373 sub generate_ipset_chains {
2374     my ($ipset_ruleset, $fw_conf) = @_;
2375
2376     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2377         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2378     }
2379 }
2380
2381 sub generate_ipset {
2382     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2383
2384     my $hashsize = scalar(@$options);
2385     if ($hashsize <= 64) {
2386         $hashsize = 64;
2387     } else {
2388         $hashsize = round_powerof2($hashsize);
2389     }
2390
2391     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2392
2393     # remove duplicates
2394     my $nethash = {};
2395     foreach my $entry (@$options) {
2396         my $cidr = $entry->{cidr};
2397         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2398             my $alias = lc($cidr);
2399             if ($aliases->{$alias}) {
2400                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2401                 $nethash->{$entry->{cidr}} = $entry;
2402             } else {
2403                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2404             }
2405         } else {
2406             $nethash->{$entry->{cidr}} = $entry;
2407         }
2408     }
2409
2410     foreach my $cidr (sort keys %$nethash) {
2411         my $entry = $nethash->{$cidr};
2412
2413         my $cmd = "add $name $cidr";
2414         if ($entry->{nomatch}) {
2415             if ($feature_ipset_nomatch) {
2416                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2417             } else {
2418                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2419             }
2420         } else {
2421             push @{$ipset_ruleset->{$name}}, $cmd;
2422         }
2423     }
2424 }
2425
2426 sub round_powerof2 {
2427     my ($int) = @_;
2428
2429     $int--;
2430     $int |= $int >> $_ foreach (1,2,4,8,16);
2431     return ++$int;
2432 }
2433
2434 sub save_pvefw_status {
2435     my ($status) = @_;
2436
2437     die "unknown status '$status' - internal error"
2438         if $status !~ m/^(stopped|active)$/;
2439
2440     mkdir dirname($pve_fw_status_filename);
2441     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2442 }
2443
2444 sub read_pvefw_status {
2445
2446     my $status = 'unknown';
2447
2448     return 'stopped' if ! -f $pve_fw_status_filename;
2449
2450     eval {
2451         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2452     };
2453     warn $@ if $@;
2454
2455     return $status;
2456 }
2457
2458 sub load_clusterfw_conf {
2459
2460     my $cluster_conf = {};
2461      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2462         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2463     }
2464
2465     return $cluster_conf;
2466 }
2467
2468 sub save_clusterfw_conf {
2469     my ($cluster_conf) = @_;
2470
2471     my $raw = '';
2472
2473     my $options = $cluster_conf->{options};
2474     $raw .= &$format_options($options) if scalar(keys %$options);
2475
2476     my $aliases = $cluster_conf->{aliases};
2477     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2478
2479     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2480         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2481             my $utf8comment = encode('utf8', $comment);
2482             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2483         } else {
2484             $raw .= "[IPSET $ipset]\n\n";
2485         }
2486         my $options = $cluster_conf->{ipset}->{$ipset};
2487         $raw .= &$format_ipset($options);
2488         $raw .= "\n";
2489     }
2490
2491     my $rules = $cluster_conf->{rules};
2492     if (scalar(@$rules)) {
2493         $raw .= "[RULES]\n\n";
2494         $raw .= &$format_rules($rules, 1);
2495         $raw .= "\n";
2496     }
2497
2498     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2499         my $rules = $cluster_conf->{groups}->{$group};
2500         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2501             my $utf8comment = encode('utf8', $comment);
2502             $raw .= "[group $group] # $utf8comment\n\n";
2503         } else {
2504             $raw .= "[group $group]\n\n";
2505         }
2506
2507         $raw .= &$format_rules($rules, 0);
2508         $raw .= "\n";
2509     }
2510
2511     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2512 }
2513
2514 sub load_hostfw_conf {
2515
2516     my $hostfw_conf = {};
2517     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2518         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2519     }
2520     return $hostfw_conf;
2521 }
2522
2523 sub save_hostfw_conf {
2524     my ($hostfw_conf) = @_;
2525
2526     my $raw = '';
2527
2528     my $options = $hostfw_conf->{options};
2529     $raw .= &$format_options($options) if scalar(keys %$options);
2530
2531     my $rules = $hostfw_conf->{rules};
2532     if (scalar(@$rules)) {
2533         $raw .= "[RULES]\n\n";
2534         $raw .= &$format_rules($rules, 1);
2535         $raw .= "\n";
2536     }
2537
2538     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2539 }
2540
2541 sub compile {
2542     my ($cluster_conf, $hostfw_conf) = @_;
2543
2544     $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2545     $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2546
2547     my $vmdata = read_local_vm_config();
2548     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2549
2550     my $ipset_ruleset = {};
2551     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2552
2553     my $ruleset = {};
2554
2555     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2556     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2557
2558     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2559
2560     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2561     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j PVEFW-VENET-OUT");
2562
2563     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2564     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in link+ -j PVEFW-FWBR-IN");
2565
2566     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2567     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out link+ -j PVEFW-FWBR-OUT");
2568
2569     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2570     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -j PVEFW-VENET-IN");
2571
2572     my $hostfw_options = $hostfw_conf->{options} || {};
2573
2574     # fixme: what log level should we use here?
2575     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2576
2577     if($hostfw_options->{optimize}){
2578
2579         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2580         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2581         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2582     }
2583
2584     if ($cluster_conf->{ipset}->{blacklist}){
2585         ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
2586         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m set --match-set PVEFW-blacklist src -j DROP");
2587     }
2588
2589     generate_std_chains($ruleset, $hostfw_options);
2590
2591     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2592
2593     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2594
2595     # generate firewall rules for QEMU VMs
2596     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2597         my $conf = $vmdata->{qemu}->{$vmid};
2598         my $vmfw_conf = $vmfw_configs->{$vmid};
2599         next if !$vmfw_conf;
2600         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2601
2602         foreach my $netid (keys %$conf) {
2603             next if $netid !~ m/^net(\d+)$/;
2604             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2605             next if !$net;
2606             my $iface = "tap${vmid}i$1";
2607
2608             my $macaddr = $net->{macaddr};
2609             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2610                                          $vmfw_conf, $vmid, 'IN');
2611             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2612                                          $vmfw_conf, $vmid, 'OUT');
2613         }
2614     }
2615
2616     # generate firewall rules for OpenVZ containers
2617     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2618         my $conf = $vmdata->{openvz}->{$vmid};
2619
2620         my $vmfw_conf = $vmfw_configs->{$vmid};
2621         next if !$vmfw_conf;
2622         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2623
2624         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2625             my $ip = $conf->{ip_address}->{value};
2626             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2627             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2628         }
2629
2630         if ($conf->{netif} && $conf->{netif}->{value}) {
2631             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2632             foreach my $netid (keys %$netif) {
2633                 my $d = $netif->{$netid};
2634
2635                 my $macaddr = $d->{mac};
2636                 my $iface = $d->{host_ifname};
2637                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2638                                              $vmfw_conf, $vmid, 'IN');
2639                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2640                                              $vmfw_conf, $vmid, 'OUT');
2641             }
2642         }
2643     }
2644
2645     return ($ruleset, $ipset_ruleset);
2646 }
2647
2648 sub get_ruleset_status {
2649     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2650
2651     my $statushash = {};
2652
2653     foreach my $chain (sort keys %$ruleset) {
2654         my $sig = &$digest_fn($ruleset->{$chain});
2655
2656         $statushash->{$chain}->{sig} = $sig;
2657
2658         my $oldsig = $active_chains->{$chain};
2659         if (!defined($oldsig)) {
2660             $statushash->{$chain}->{action} = 'create';
2661         } else {
2662             if ($oldsig eq $sig) {
2663                 $statushash->{$chain}->{action} = 'exists';
2664             } else {
2665                 $statushash->{$chain}->{action} = 'update';
2666             }
2667         }
2668         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2669         foreach my $cmd (@{$ruleset->{$chain}}) {
2670             print "\t$cmd\n" if $verbose;
2671         }
2672     }
2673
2674     foreach my $chain (sort keys %$active_chains) {
2675         if (!defined($ruleset->{$chain})) {
2676             my $sig = $active_chains->{$chain};
2677             $statushash->{$chain}->{action} = 'delete';
2678             $statushash->{$chain}->{sig} = $sig;
2679             print "delete $chain ($sig)\n" if $verbose;
2680         }
2681     }
2682
2683     return $statushash;
2684 }
2685
2686 sub print_sig_rule {
2687     my ($chain, $sig) = @_;
2688
2689     # We just use this to store a SHA1 checksum used to detect changes
2690     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2691 }
2692
2693 sub get_ruleset_cmdlist {
2694     my ($ruleset, $verbose) = @_;
2695
2696     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2697
2698     my ($active_chains, $hooks) = iptables_get_chains();
2699     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2700
2701     # create missing chains first
2702     foreach my $chain (sort keys %$ruleset) {
2703         my $stat = $statushash->{$chain};
2704         die "internal error" if !$stat;
2705         next if $stat->{action} ne 'create';
2706
2707         $cmdlist .= ":$chain - [0:0]\n";
2708     }
2709
2710     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2711         if (!$hooks->{$h}) {
2712             $cmdlist .= "-A $h -j PVEFW-$h\n";
2713         }
2714     }
2715
2716     foreach my $chain (sort keys %$ruleset) {
2717         my $stat = $statushash->{$chain};
2718         die "internal error" if !$stat;
2719
2720         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2721             $cmdlist .= "-F $chain\n";
2722             foreach my $cmd (@{$ruleset->{$chain}}) {
2723                 $cmdlist .= "$cmd\n";
2724             }
2725             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2726         } elsif ($stat->{action} eq 'delete') {
2727             die "internal error"; # this should not happen
2728         } elsif ($stat->{action} eq 'exists') {
2729             # do nothing
2730         } else {
2731             die "internal error - unknown status '$stat->{action}'";
2732         }
2733     }
2734
2735     foreach my $chain (keys %$statushash) {
2736         next if $statushash->{$chain}->{action} ne 'delete';
2737         $cmdlist .= "-F $chain\n";
2738     }
2739     foreach my $chain (keys %$statushash) {
2740         next if $statushash->{$chain}->{action} ne 'delete';
2741         next if $chain eq 'PVEFW-INPUT';
2742         next if $chain eq 'PVEFW-OUTPUT';
2743         next if $chain eq 'PVEFW-FORWARD';
2744         $cmdlist .= "-X $chain\n";
2745     }
2746
2747     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2748
2749     $cmdlist .= "COMMIT\n";
2750
2751     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2752 }
2753
2754 sub get_ipset_cmdlist {
2755     my ($ruleset, $verbose) = @_;
2756
2757     my $cmdlist = "";
2758
2759     my $delete_cmdlist = "";
2760
2761     my $active_chains = ipset_get_chains();
2762     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2763
2764     # remove stale _swap chains
2765     foreach my $chain (keys %$active_chains) {
2766         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2767             $cmdlist .= "destroy $chain\n";
2768         }
2769     }
2770
2771     foreach my $chain (sort keys %$ruleset) {
2772         my $stat = $statushash->{$chain};
2773         die "internal error" if !$stat;
2774
2775         if ($stat->{action} eq 'create') {
2776             foreach my $cmd (@{$ruleset->{$chain}}) {
2777                 $cmdlist .= "$cmd\n";
2778             }
2779         }
2780
2781         if ($stat->{action} eq 'update') {
2782             my $chain_swap = $chain."_swap";
2783
2784             foreach my $cmd (@{$ruleset->{$chain}}) {
2785                 $cmd =~ s/$chain/$chain_swap/;
2786                 $cmdlist .= "$cmd\n";
2787             }
2788             $cmdlist .= "swap $chain_swap $chain\n";
2789             $cmdlist .= "flush $chain_swap\n";
2790             $cmdlist .= "destroy $chain_swap\n";
2791         }
2792
2793     }
2794
2795     foreach my $chain (keys %$statushash) {
2796         next if $statushash->{$chain}->{action} ne 'delete';
2797
2798         $delete_cmdlist .= "flush $chain\n";
2799         $delete_cmdlist .= "destroy $chain\n";
2800     }
2801
2802     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2803
2804     return ($cmdlist, $delete_cmdlist, $changes);
2805 }
2806
2807 sub apply_ruleset {
2808     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2809
2810     enable_bridge_firewall();
2811
2812     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2813         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2814
2815     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2816
2817     if ($verbose) {
2818         if ($ipset_changes) {
2819             print "ipset changes:\n";
2820             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2821             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2822         }
2823
2824         if ($changes) {
2825             print "iptables changes:\n";
2826             print $cmdlist;
2827         }
2828     }
2829
2830     ipset_restore_cmdlist($ipset_create_cmdlist);
2831
2832     iptables_restore_cmdlist($cmdlist);
2833
2834     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2835
2836     # test: re-read status and check if everything is up to date
2837     my $active_chains = iptables_get_chains();
2838     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2839
2840     my $errors;
2841     foreach my $chain (sort keys %$ruleset) {
2842         my $stat = $statushash->{$chain};
2843         if ($stat->{action} ne 'exists') {
2844             warn "unable to update chain '$chain'\n";
2845             $errors = 1;
2846         }
2847     }
2848
2849     die "unable to apply firewall changes\n" if $errors;
2850
2851     update_nf_conntrack_max($hostfw_conf);
2852
2853     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2854
2855 }
2856
2857 sub update_nf_conntrack_max {
2858     my ($hostfw_conf) = @_;
2859
2860     my $max = 65536; # reasonable default
2861
2862     my $options = $hostfw_conf->{options} || {};
2863
2864     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2865         $max = $options->{nf_conntrack_max};
2866         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2867     }
2868
2869     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2870     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2871
2872     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2873
2874     if ($current != $max) {
2875         my $hashsize = int($max/4);
2876         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2877         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2878     }
2879 }
2880
2881 sub update_nf_conntrack_tcp_timeout_established {
2882     my ($hostfw_conf) = @_;
2883
2884     my $options = $hostfw_conf->{options} || {};
2885
2886     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2887
2888     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2889 }
2890
2891 sub remove_pvefw_chains {
2892
2893     my ($chash, $hooks) = iptables_get_chains();
2894     my $cmdlist = "*filter\n";
2895
2896     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2897         if ($hooks->{$h}) {
2898             $cmdlist .= "-D $h -j PVEFW-$h\n";
2899         }
2900     }
2901
2902     foreach my $chain (keys %$chash) {
2903         $cmdlist .= "-F $chain\n";
2904     }
2905
2906     foreach my $chain (keys %$chash) {
2907         $cmdlist .= "-X $chain\n";
2908     }
2909     $cmdlist .= "COMMIT\n";
2910
2911     iptables_restore_cmdlist($cmdlist);
2912 }
2913
2914 sub update {
2915     my ($start, $verbose) = @_;
2916
2917     my $code = sub {
2918
2919         my $cluster_conf = load_clusterfw_conf();
2920         my $cluster_options = $cluster_conf->{options};
2921
2922         my $enable = $cluster_options->{enable};
2923
2924         my $status = read_pvefw_status();
2925
2926         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2927
2928         if (!$enable) {
2929             PVE::Firewall::remove_pvefw_chains();
2930             print "Firewall disabled\n" if $verbose;
2931             return;
2932         }
2933
2934         my $hostfw_conf = load_hostfw_conf();
2935
2936         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2937
2938         if ($start || $status eq 'active') {
2939
2940             save_pvefw_status('active') if ($status ne 'active');
2941
2942             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2943         } else {
2944             print "Firewall not active (status = $status)\n" if $verbose;
2945         }
2946     };
2947
2948     run_locked($code);
2949 }
2950
2951
2952 1;