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_chain_add_conn_filters {
1432     my ($ruleset, $chain, $accept) = @_;
1433
1434     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1435     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1436 }
1437
1438 sub ruleset_chain_add_input_filters {
1439     my ($ruleset, $chain, $options) = @_;
1440
1441     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1442         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1443     }
1444
1445     if ($options->{tcpflags}) {
1446         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1447     }
1448 }
1449
1450 sub ruleset_create_vm_chain {
1451     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1452
1453     ruleset_create_chain($ruleset, $chain);
1454     my $accept = generate_nfqueue($options);
1455
1456     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1457         if ($direction eq 'OUT') {
1458             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1459                                                       proto => 'udp', sport => 68, dport => 67 });
1460         } else {
1461             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1462                                                       proto => 'udp', sport => 67, dport => 68 });
1463         }
1464     }
1465
1466     if ($direction eq 'OUT') {
1467         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1468             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1469         }
1470         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1471     }
1472 }
1473
1474 sub ruleset_generate_vm_rules {
1475     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1476
1477     my $lc_direction = lc($direction);
1478
1479     my $in_accept = generate_nfqueue($options);
1480
1481     foreach my $rule (@$rules) {
1482         next if $rule->{iface} && $rule->{iface} ne $netid;
1483         next if !$rule->{enable};
1484         if ($rule->{type} eq 'group') {
1485             my $group_chain = "GROUP-$rule->{action}-$direction";
1486             if(!ruleset_chain_exist($ruleset, $group_chain)){
1487                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1488             }
1489             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1490             if ($direction eq 'OUT'){
1491                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1492             }else{
1493                 my $accept = generate_nfqueue($options);
1494                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1495             }
1496
1497         } else {
1498             next if $rule->{type} ne $lc_direction;
1499             eval {
1500                 if ($direction eq 'OUT') {
1501                     ruleset_generate_rule($ruleset, $chain, $rule,
1502                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1503                                           undef, $cluster_conf);
1504                 } else {
1505                     ruleset_generate_rule($ruleset, $chain, $rule,
1506                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1507                                           undef, $cluster_conf);
1508                 }
1509             };
1510             warn $@ if $@;
1511         }
1512     }
1513 }
1514
1515 sub generate_nfqueue {
1516     my ($options) = @_;
1517
1518     if ($options->{ips}) {
1519         my $action = "NFQUEUE";
1520         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1521             if (defined($3) && defined($1)) {
1522                 $action .= " --queue-balance $1:$3";
1523             } elsif (defined($1)) {
1524                 $action .= " --queue-num $1";
1525             }
1526         }
1527         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1528         return $action;
1529     } else {
1530         return "ACCEPT";
1531     }
1532 }
1533
1534 sub ruleset_generate_vm_ipsrules {
1535     my ($ruleset, $options, $direction, $iface) = @_;
1536
1537     if ($options->{ips} && $direction eq 'IN') {
1538         my $nfqueue = generate_nfqueue($options);
1539
1540         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1541             ruleset_create_chain($ruleset, "PVEFW-IPS");
1542         }
1543
1544         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1545     }
1546 }
1547
1548 sub generate_venet_rules_direction {
1549     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1550
1551     parse_address_list($ip); # make sure we have a valid $ip list
1552
1553     my $lc_direction = lc($direction);
1554
1555     my $rules = $vmfw_conf->{rules};
1556
1557     my $options = $vmfw_conf->{options};
1558     my $hostfw_options = $vmfw_conf->{options};
1559     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1560
1561     my $chain = "venet0-$vmid-$direction";
1562
1563     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1564
1565     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1566
1567     # implement policy
1568     my $policy;
1569
1570     if ($direction eq 'OUT') {
1571         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1572     } else {
1573         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1574     }
1575
1576     my $accept = generate_nfqueue($options);
1577     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1578     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1579
1580     if ($direction eq 'OUT') {
1581         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1582             action => $chain,
1583             source => $ip,
1584             iface_in => 'venet0'});
1585     } else {
1586         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1587             action => $chain,
1588             dest => $ip,
1589             iface_out => 'venet0'});
1590     }
1591 }
1592
1593 sub generate_tap_rules_direction {
1594     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1595
1596     my $lc_direction = lc($direction);
1597
1598     my $rules = $vmfw_conf->{rules};
1599
1600     my $options = $vmfw_conf->{options};
1601     my $hostfw_options = $hostfw_conf->{options};
1602     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1603
1604     my $tapchain = "$iface-$direction";
1605
1606     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1607
1608     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1609
1610     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1611
1612     # implement policy
1613     my $policy;
1614
1615     if ($direction eq 'OUT') {
1616         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1617     } else {
1618         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1619     }
1620
1621     my $accept = generate_nfqueue($options);
1622     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1623     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1624
1625     # plug the tap chain to bridge chain
1626     if ($direction eq 'IN') {
1627         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1628                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1629     } else {
1630         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1631                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1632     }
1633 }
1634
1635 sub enable_host_firewall {
1636     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1637
1638     my $options = $hostfw_conf->{options};
1639     my $cluster_options = $cluster_conf->{options};
1640     my $rules = $hostfw_conf->{rules};
1641     my $cluster_rules = $cluster_conf->{rules};
1642
1643     # host inbound firewall
1644     my $chain = "PVEFW-HOST-IN";
1645     ruleset_create_chain($ruleset, $chain);
1646
1647     my $loglevel = get_option_log_level($options, "log_level_in");
1648
1649     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1650
1651     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1652     ruleset_chain_add_input_filters($ruleset, $chain, $options);
1653
1654     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1655     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1656     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1657
1658     # we use RETURN because we need to check also tap rules
1659     my $accept_action = 'RETURN';
1660
1661     # add host rules first, so that cluster wide rules can be overwritten
1662     foreach my $rule (@$rules, @$cluster_rules) {
1663         next if $rule->{type} ne 'in';
1664         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1665     }
1666
1667     # implement input policy
1668     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1669     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1670
1671     # host outbound firewall
1672     $chain = "PVEFW-HOST-OUT";
1673     ruleset_create_chain($ruleset, $chain);
1674
1675     $loglevel = get_option_log_level($options, "log_level_out");
1676
1677     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1678
1679     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1680
1681     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1682     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1683     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1684
1685     # we use RETURN because we may want to check other thigs later
1686     $accept_action = 'RETURN';
1687
1688     # add host rules first, so that cluster wide rules can be overwritten
1689     foreach my $rule (@$rules, @$cluster_rules) {
1690         next if $rule->{type} ne 'out';
1691         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1692     }
1693
1694     # implement output policy
1695     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1696     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1697
1698     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1699     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1700 }
1701
1702 sub generate_group_rules {
1703     my ($ruleset, $cluster_conf, $group) = @_;
1704     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1705
1706     my $rules = $cluster_conf->{groups}->{$group};
1707
1708     my $chain = "GROUP-${group}-IN";
1709
1710     ruleset_create_chain($ruleset, $chain);
1711     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1712
1713     foreach my $rule (@$rules) {
1714         next if $rule->{type} ne 'in';
1715         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1716     }
1717
1718     $chain = "GROUP-${group}-OUT";
1719
1720     ruleset_create_chain($ruleset, $chain);
1721     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1722
1723     foreach my $rule (@$rules) {
1724         next if $rule->{type} ne 'out';
1725         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1726         # check also other tap rules later
1727         ruleset_generate_rule($ruleset, $chain, $rule,
1728                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1729     }
1730 }
1731
1732 my $MAX_NETS = 32;
1733 my $valid_netdev_names = {};
1734 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1735     $valid_netdev_names->{"net$i"} = 1;
1736 }
1737
1738 sub parse_fw_rule {
1739     my ($line, $need_iface, $allow_groups) = @_;
1740
1741     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1742
1743     # we can add single line comments to the end of the rule
1744     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1745
1746     # we can disable a rule when prefixed with '|'
1747     my $enable = 1;
1748
1749     $enable = 0 if $line =~ s/^\|//;
1750
1751     my @data = split(/\s+/, $line);
1752     my $expected_elements = $need_iface ? 8 : 7;
1753
1754     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1755
1756     if ($need_iface) {
1757         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1758     } else {
1759         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1760     }
1761
1762     die "incomplete rule\n" if ! ($type && $action);
1763
1764     my $macro;
1765
1766     $type = lc($type);
1767
1768     if ($type eq  'in' || $type eq 'out') {
1769         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1770             # OK
1771         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1772             $action = $2;
1773             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1774             die "unknown macro '$1'\n" if !$preferred_name;
1775             $macro = $preferred_name;
1776         } else {
1777             die "unknown action '$action'\n";
1778         }
1779     } elsif ($type eq 'group') {
1780         die "wrong number of rule elements\n" if scalar(@data) != 3;
1781         die "groups disabled\n" if !$allow_groups;
1782
1783         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1784     } else {
1785         die "unknown rule type '$type'\n";
1786     }
1787
1788     if ($need_iface) {
1789         $iface = undef if $iface && $iface eq '-';
1790     }
1791
1792     $proto = undef if $proto && $proto eq '-';
1793     pve_fw_verify_protocol_spec($proto) if $proto;
1794
1795     $source = undef if $source && $source eq '-';
1796     $dest = undef if $dest && $dest eq '-';
1797
1798     $dport = undef if $dport && $dport eq '-';
1799     $sport = undef if $sport && $sport eq '-';
1800
1801     parse_port_name_number_or_range($dport) if defined($dport);
1802     parse_port_name_number_or_range($sport) if defined($sport);
1803
1804     parse_address_list($source) if $source;
1805     parse_address_list($dest) if $dest;
1806
1807     return {
1808         type => $type,
1809         enable => $enable,
1810         comment => $comment,
1811         action => $action,
1812         macro => $macro,
1813         iface => $iface,
1814         source => $source,
1815         dest => $dest,
1816         proto => $proto,
1817         dport => $dport,
1818         sport => $sport,
1819     };
1820 }
1821
1822 sub parse_vmfw_option {
1823     my ($line) = @_;
1824
1825     my ($opt, $value);
1826
1827     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1828
1829     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1830         $opt = lc($1);
1831         $value = int($2);
1832     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1833         $opt = lc($1);
1834         $value = $2 ? lc($3) : '';
1835     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1836         $opt = lc($1);
1837         $value = uc($3);
1838     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1839         $opt = lc($1);
1840         $value = $2;
1841     } else {
1842         chomp $line;
1843         die "can't parse option '$line'\n"
1844     }
1845
1846     return ($opt, $value);
1847 }
1848
1849 sub parse_hostfw_option {
1850     my ($line) = @_;
1851
1852     my ($opt, $value);
1853
1854     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1855
1856     if ($line =~ m/^(enable|nosmurfs|tcpflags|optimize):\s*(0|1)\s*$/i) {
1857         $opt = lc($1);
1858         $value = int($2);
1859     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1860         $opt = lc($1);
1861         $value = $2 ? lc($3) : '';
1862     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1863         $opt = lc($1);
1864         $value = int($2);
1865     } else {
1866         chomp $line;
1867         die "can't parse option '$line'\n"
1868     }
1869
1870     return ($opt, $value);
1871 }
1872
1873 sub parse_clusterfw_option {
1874     my ($line) = @_;
1875
1876     my ($opt, $value);
1877
1878     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1879         $opt = lc($1);
1880         $value = int($2);
1881     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1882         $opt = lc($1);
1883         $value = uc($3);
1884     } else {
1885         chomp $line;
1886         die "can't parse option '$line'\n"
1887     }
1888
1889     return ($opt, $value);
1890 }
1891
1892 sub parse_clusterfw_alias {
1893     my ($line) = @_;
1894
1895     # we can add single line comments to the end of the line
1896     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1897
1898     if ($line =~ m/^(\S+)\s(\S+)$/) {
1899         my ($name, $cidr) = ($1, $2);
1900         $cidr =~ s|/32$||;
1901         pve_verify_ipv4_or_cidr($cidr);
1902         my $data = {
1903             name => $name,
1904             cidr => $cidr,
1905         };
1906         $data->{comment} = $comment  if $comment;
1907         return $data;
1908     }
1909
1910     return undef;
1911 }
1912
1913 sub parse_vm_fw_rules {
1914     my ($filename, $fh) = @_;
1915
1916     my $res = { rules => [], options => {}};
1917
1918     my $section;
1919
1920     while (defined(my $line = <$fh>)) {
1921         next if $line =~ m/^#/;
1922         next if $line =~ m/^\s*$/;
1923
1924         my $linenr = $fh->input_line_number();
1925         my $prefix = "$filename (line $linenr)";
1926
1927         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1928             $section = lc($1);
1929             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1930             next;
1931         }
1932         if (!$section) {
1933             warn "$prefix: skip line - no section";
1934             next;
1935         }
1936
1937         next if !$res->{$section}; # skip undefined section
1938
1939         if ($section eq 'options') {
1940             eval {
1941                 my ($opt, $value) = parse_vmfw_option($line);
1942                 $res->{options}->{$opt} = $value;
1943             };
1944             warn "$prefix: $@" if $@;
1945             next;
1946         }
1947
1948         my $rule;
1949         eval { $rule = parse_fw_rule($line, 1, 1); };
1950         if (my $err = $@) {
1951             warn "$prefix: $err";
1952             next;
1953         }
1954
1955         push @{$res->{$section}}, $rule;
1956     }
1957
1958     return $res;
1959 }
1960
1961 sub parse_host_fw_rules {
1962     my ($filename, $fh) = @_;
1963
1964     my $res = { rules => [], options => {}};
1965
1966     my $section;
1967
1968     while (defined(my $line = <$fh>)) {
1969         next if $line =~ m/^#/;
1970         next if $line =~ m/^\s*$/;
1971
1972         my $linenr = $fh->input_line_number();
1973         my $prefix = "$filename (line $linenr)";
1974
1975         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1976             $section = lc($1);
1977             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1978             next;
1979         }
1980         if (!$section) {
1981             warn "$prefix: skip line - no section";
1982             next;
1983         }
1984
1985         next if !$res->{$section}; # skip undefined section
1986
1987         if ($section eq 'options') {
1988             eval {
1989                 my ($opt, $value) = parse_hostfw_option($line);
1990                 $res->{options}->{$opt} = $value;
1991             };
1992             warn "$prefix: $@" if $@;
1993             next;
1994         }
1995
1996         my $rule;
1997         eval { $rule = parse_fw_rule($line, 1, 1); };
1998         if (my $err = $@) {
1999             warn "$prefix: $err";
2000             next;
2001         }
2002
2003         push @{$res->{$section}}, $rule;
2004     }
2005
2006     return $res;
2007 }
2008
2009 sub parse_cluster_fw_rules {
2010     my ($filename, $fh) = @_;
2011
2012     my $section;
2013     my $group;
2014
2015     my $res = {
2016         rules => [],
2017         options => {},
2018         aliases => {},
2019         groups => {},
2020         group_comments => {},
2021         ipset => {} ,
2022         ipset_comments => {},
2023     };
2024
2025     while (defined(my $line = <$fh>)) {
2026         next if $line =~ m/^#/;
2027         next if $line =~ m/^\s*$/;
2028
2029         my $linenr = $fh->input_line_number();
2030         my $prefix = "$filename (line $linenr)";
2031
2032         if ($line =~ m/^\[options\]$/i) {
2033             $section = 'options';
2034             next;
2035         }
2036
2037         if ($line =~ m/^\[aliases\]$/i) {
2038             $section = 'aliases';
2039             next;
2040         }
2041
2042         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2043             $section = 'groups';
2044             $group = lc($1);
2045             my $comment = $2;
2046             $res->{$section}->{$group} = [];
2047             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2048                 if $comment;
2049             next;
2050         }
2051
2052         if ($line =~ m/^\[rules\]$/i) {
2053             $section = 'rules';
2054             next;
2055         }
2056
2057         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2058             $section = 'ipset';
2059             $group = lc($1);
2060             my $comment = $2;
2061             $res->{$section}->{$group} = [];
2062             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2063                 if $comment;
2064             next;
2065         }
2066
2067         if (!$section) {
2068             warn "$prefix: skip line - no section\n";
2069             next;
2070         }
2071
2072         if ($section eq 'options') {
2073             eval {
2074                 my ($opt, $value) = parse_clusterfw_option($line);
2075                 $res->{options}->{$opt} = $value;
2076             };
2077             warn "$prefix: $@" if $@;
2078         } elsif ($section eq 'aliases') {
2079             eval {
2080                 my $data = parse_clusterfw_alias($line);
2081                 $res->{aliases}->{lc($data->{name})} = $data;
2082             };
2083             warn "$prefix: $@" if $@;
2084         } elsif ($section eq 'rules') {
2085             my $rule;
2086             eval { $rule = parse_fw_rule($line, 1, 1); };
2087             if (my $err = $@) {
2088                 warn "$prefix: $err";
2089                 next;
2090             }
2091             push @{$res->{$section}}, $rule;
2092         } elsif ($section eq 'groups') {
2093             my $rule;
2094             eval { $rule = parse_fw_rule($line, 0, 0); };
2095             if (my $err = $@) {
2096                 warn "$prefix: $err";
2097                 next;
2098             }
2099             push @{$res->{$section}->{$group}}, $rule;
2100         } elsif ($section eq 'ipset') {
2101             # we can add single line comments to the end of the rule
2102             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2103
2104             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2105             my $nomatch = $1;
2106             my $cidr = $2;
2107
2108             if($cidr !~ m/^${ip_alias_pattern}$/) {
2109                 $cidr =~ s|/32$||;
2110
2111                 eval { pve_verify_ipv4_or_cidr($cidr); };
2112                 if (my $err = $@) {
2113                     warn "$prefix: $cidr - $err";
2114                     next;
2115                 }
2116             }
2117
2118             my $entry = { cidr => $cidr };
2119             $entry->{nomatch} = 1 if $nomatch;
2120             $entry->{comment} = $comment if $comment;
2121
2122             push @{$res->{$section}->{$group}}, $entry;
2123         }
2124     }
2125
2126     return $res;
2127 }
2128
2129 sub run_locked {
2130     my ($code, @param) = @_;
2131
2132     my $timeout = 10;
2133
2134     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2135
2136     die $@ if $@;
2137
2138     return $res;
2139 }
2140
2141 sub read_local_vm_config {
2142
2143     my $openvz = {};
2144     my $qemu = {};
2145
2146     my $vmdata = { openvz => $openvz, qemu => $qemu };
2147
2148     my $vmlist = PVE::Cluster::get_vmlist();
2149     return $vmdata if !$vmlist || !$vmlist->{ids};
2150     my $ids = $vmlist->{ids};
2151
2152     foreach my $vmid (keys %$ids) {
2153         next if !$vmid; # skip VE0
2154         my $d = $ids->{$vmid};
2155         next if !$d->{node} || $d->{node} ne $nodename;
2156         next if !$d->{type};
2157         if ($d->{type} eq 'openvz') {
2158             if ($have_pve_manager) {
2159                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2160                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2161                     $openvz->{$vmid} = $conf;
2162                 }
2163             }
2164         } elsif ($d->{type} eq 'qemu') {
2165             if ($have_qemu_server) {
2166                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2167                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2168                     $qemu->{$vmid} = $conf;
2169                 }
2170             }
2171         }
2172     }
2173
2174     return $vmdata;
2175 };
2176
2177 sub load_vmfw_conf {
2178     my ($vmid, $dir) = @_;
2179
2180     my $vmfw_conf = {};
2181
2182     $dir = "/etc/pve/firewall" if !defined($dir);
2183
2184     my $filename = "$dir/$vmid.fw";
2185     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2186         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2187     }
2188
2189     return $vmfw_conf;
2190 }
2191
2192 my $format_rules = sub {
2193     my ($rules, $need_iface) = @_;
2194
2195     my $raw = '';
2196
2197     foreach my $rule (@$rules) {
2198         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2199             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2200             $raw .= uc($rule->{type});
2201             if ($rule->{macro}) {
2202                 $raw .= " $rule->{macro}($rule->{action})";
2203             } else {
2204                 $raw .= " " . $rule->{action};
2205             }
2206             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2207
2208             if ($rule->{type} ne  'group')  {
2209                 $raw .= " " . ($rule->{source} || '-');
2210                 $raw .= " " . ($rule->{dest} || '-');
2211                 $raw .= " " . ($rule->{proto} || '-');
2212                 $raw .= " " . ($rule->{dport} || '-');
2213                 $raw .= " " . ($rule->{sport} || '-');
2214             }
2215
2216             $raw .= " # " . encode('utf8', $rule->{comment})
2217                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2218             $raw .= "\n";
2219         } else {
2220             die "unknown rule type '$rule->{type}'";
2221         }
2222     }
2223
2224     return $raw;
2225 };
2226
2227 my $format_options = sub {
2228     my ($options) = @_;
2229
2230     my $raw = '';
2231
2232     $raw .= "[OPTIONS]\n\n";
2233     foreach my $opt (keys %$options) {
2234         $raw .= "$opt: $options->{$opt}\n";
2235     }
2236     $raw .= "\n";
2237
2238     return $raw;
2239 };
2240
2241 my $format_aliases = sub {
2242     my ($aliases) = @_;
2243
2244     my $raw = '';
2245
2246     $raw .= "[ALIASES]\n\n";
2247     foreach my $k (keys %$aliases) {
2248         my $e = $aliases->{$k};
2249         $raw .= "$e->{name} $e->{cidr}";
2250         $raw .= " # " . encode('utf8', $e->{comment})
2251             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2252         $raw .= "\n";
2253     }
2254     $raw .= "\n";
2255
2256     return $raw;
2257 };
2258
2259 my $format_ipset = sub {
2260     my ($options) = @_;
2261
2262     my $raw = '';
2263
2264     my $nethash = {};
2265     foreach my $entry (@$options) {
2266         $nethash->{$entry->{cidr}} = $entry;
2267     }
2268
2269     foreach my $cidr (sort keys %$nethash) {
2270         my $entry = $nethash->{$cidr};
2271         my $line = $entry->{nomatch} ? '!' : '';
2272         $line .= $entry->{cidr};
2273         $line .= " # " . encode('utf8', $entry->{comment})
2274             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2275         $raw .= "$line\n";
2276     }
2277
2278     return $raw;
2279 };
2280
2281 sub save_vmfw_conf {
2282     my ($vmid, $vmfw_conf) = @_;
2283
2284     my $raw = '';
2285
2286     my $options = $vmfw_conf->{options};
2287     $raw .= &$format_options($options) if scalar(keys %$options);
2288
2289     my $rules = $vmfw_conf->{rules} || [];
2290     if (scalar(@$rules)) {
2291         $raw .= "[RULES]\n\n";
2292         $raw .= &$format_rules($rules, 1);
2293         $raw .= "\n";
2294     }
2295
2296     my $filename = "/etc/pve/firewall/$vmid.fw";
2297     PVE::Tools::file_set_contents($filename, $raw);
2298 }
2299
2300 sub read_vm_firewall_configs {
2301     my ($vmdata, $dir) = @_;
2302
2303     my $vmfw_configs = {};
2304
2305     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2306         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2307         next if !$vmfw_conf->{options}; # skip if file does not exists
2308         $vmfw_configs->{$vmid} = $vmfw_conf;
2309     }
2310
2311     return $vmfw_configs;
2312 }
2313
2314 sub get_option_log_level {
2315     my ($options, $k) = @_;
2316
2317     my $v = $options->{$k};
2318     $v = $default_log_level if !defined($v);
2319
2320     return undef if $v eq '' || $v eq 'nolog';
2321
2322     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2323
2324     return $v if ($v >= 0) && ($v <= 7);
2325
2326     warn "unknown log level ($k = '$v')\n";
2327
2328     return undef;
2329 }
2330
2331 sub generate_std_chains {
2332     my ($ruleset, $options) = @_;
2333
2334     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2335
2336     # same as shorewall smurflog.
2337     my $chain = 'PVEFW-smurflog';
2338     $pve_std_chains->{$chain} = [];
2339
2340     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2341     push @{$pve_std_chains->{$chain}}, "-j DROP";
2342
2343     # same as shorewall logflags action.
2344     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2345     $chain = 'PVEFW-logflags';
2346     $pve_std_chains->{$chain} = [];
2347
2348     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
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     foreach my $chain (keys %$pve_std_chains) {
2353         ruleset_create_chain($ruleset, $chain);
2354         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2355             if (ref($rule)) {
2356                 ruleset_generate_rule($ruleset, $chain, $rule);
2357             } else {
2358                 ruleset_addrule($ruleset, $chain, $rule);
2359             }
2360         }
2361     }
2362 }
2363
2364 sub generate_ipset_chains {
2365     my ($ipset_ruleset, $fw_conf) = @_;
2366
2367     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2368         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2369     }
2370 }
2371
2372 sub generate_ipset {
2373     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2374
2375     my $hashsize = scalar(@$options);
2376     if ($hashsize <= 64) {
2377         $hashsize = 64;
2378     } else {
2379         $hashsize = round_powerof2($hashsize);
2380     }
2381
2382     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2383
2384     # remove duplicates
2385     my $nethash = {};
2386     foreach my $entry (@$options) {
2387         my $cidr = $entry->{cidr};
2388         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2389             my $alias = lc($cidr);
2390             if ($aliases->{$alias}) {
2391                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2392                 $nethash->{$entry->{cidr}} = $entry;
2393             } else {
2394                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2395             }
2396         } else {
2397             $nethash->{$entry->{cidr}} = $entry;
2398         }
2399     }
2400
2401     foreach my $cidr (sort keys %$nethash) {
2402         my $entry = $nethash->{$cidr};
2403
2404         my $cmd = "add $name $cidr";
2405         if ($entry->{nomatch}) {
2406             if ($feature_ipset_nomatch) {
2407                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2408             } else {
2409                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2410             }
2411         } else {
2412             push @{$ipset_ruleset->{$name}}, $cmd;
2413         }
2414     }
2415 }
2416
2417 sub round_powerof2 {
2418     my ($int) = @_;
2419
2420     $int--;
2421     $int |= $int >> $_ foreach (1,2,4,8,16);
2422     return ++$int;
2423 }
2424
2425 sub save_pvefw_status {
2426     my ($status) = @_;
2427
2428     die "unknown status '$status' - internal error"
2429         if $status !~ m/^(stopped|active)$/;
2430
2431     mkdir dirname($pve_fw_status_filename);
2432     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2433 }
2434
2435 sub read_pvefw_status {
2436
2437     my $status = 'unknown';
2438
2439     return 'stopped' if ! -f $pve_fw_status_filename;
2440
2441     eval {
2442         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2443     };
2444     warn $@ if $@;
2445
2446     return $status;
2447 }
2448
2449 sub load_clusterfw_conf {
2450     my ($filename) = @_;
2451
2452     $filename = $clusterfw_conf_filename if !defined($filename);
2453
2454     my $cluster_conf = {};
2455     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2456         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2457     }
2458
2459     return $cluster_conf;
2460 }
2461
2462 sub save_clusterfw_conf {
2463     my ($cluster_conf) = @_;
2464
2465     my $raw = '';
2466
2467     my $options = $cluster_conf->{options};
2468     $raw .= &$format_options($options) if scalar(keys %$options);
2469
2470     my $aliases = $cluster_conf->{aliases};
2471     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2472
2473     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2474         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2475             my $utf8comment = encode('utf8', $comment);
2476             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2477         } else {
2478             $raw .= "[IPSET $ipset]\n\n";
2479         }
2480         my $options = $cluster_conf->{ipset}->{$ipset};
2481         $raw .= &$format_ipset($options);
2482         $raw .= "\n";
2483     }
2484
2485     my $rules = $cluster_conf->{rules};
2486     if (scalar(@$rules)) {
2487         $raw .= "[RULES]\n\n";
2488         $raw .= &$format_rules($rules, 1);
2489         $raw .= "\n";
2490     }
2491
2492     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2493         my $rules = $cluster_conf->{groups}->{$group};
2494         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2495             my $utf8comment = encode('utf8', $comment);
2496             $raw .= "[group $group] # $utf8comment\n\n";
2497         } else {
2498             $raw .= "[group $group]\n\n";
2499         }
2500
2501         $raw .= &$format_rules($rules, 0);
2502         $raw .= "\n";
2503     }
2504
2505     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2506 }
2507
2508 sub load_hostfw_conf {
2509     my ($filename) = @_;
2510
2511     $filename = $hostfw_conf_filename if !defined($filename);
2512
2513     my $hostfw_conf = {};
2514     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2515         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2516     }
2517     return $hostfw_conf;
2518 }
2519
2520 sub save_hostfw_conf {
2521     my ($hostfw_conf) = @_;
2522
2523     my $raw = '';
2524
2525     my $options = $hostfw_conf->{options};
2526     $raw .= &$format_options($options) if scalar(keys %$options);
2527
2528     my $rules = $hostfw_conf->{rules};
2529     if (scalar(@$rules)) {
2530         $raw .= "[RULES]\n\n";
2531         $raw .= &$format_rules($rules, 1);
2532         $raw .= "\n";
2533     }
2534
2535     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2536 }
2537
2538 sub compile {
2539     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2540
2541     my $vmfw_configs;
2542
2543     if ($vmdata) { # test mode
2544         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2545         my $filename = "$testdir/cluster.fw";
2546         die "missing test file '$filename'\n" if ! -f $filename;
2547         $cluster_conf = load_clusterfw_conf($filename);
2548
2549         $filename = "$testdir/host.fw";
2550         die "missing test file '$filename'\n" if ! -f $filename;
2551         $hostfw_conf = load_hostfw_conf($filename);
2552
2553         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2554     } else { # normal operation
2555         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2556
2557         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2558
2559         $vmdata = read_local_vm_config();
2560         $vmfw_configs = read_vm_firewall_configs($vmdata);
2561     }
2562
2563
2564     my $ipset_ruleset = {};
2565     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2566
2567     my $ruleset = {};
2568
2569     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2570     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2571
2572     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2573
2574     my $hostfw_options = $hostfw_conf->{options} || {};
2575
2576     # fixme: what log level should we use here?
2577     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2578
2579     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2580
2581     if ($cluster_conf->{ipset}->{blacklist}){
2582         ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
2583         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m set --match-set PVEFW-blacklist src -j DROP");
2584     }
2585
2586     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2587     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j PVEFW-VENET-OUT");
2588     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -j PVEFW-VENET-OUT");
2589
2590     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2591     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options);
2592
2593     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in link+ -j PVEFW-FWBR-IN");
2594
2595     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2596     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out link+ -j PVEFW-FWBR-OUT");
2597
2598     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2599     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options);
2600
2601     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -j PVEFW-VENET-IN");
2602
2603     generate_std_chains($ruleset, $hostfw_options);
2604
2605     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2606
2607     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2608
2609     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -j PVEFW-VENET-IN");
2610
2611     # generate firewall rules for QEMU VMs
2612     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2613         my $conf = $vmdata->{qemu}->{$vmid};
2614         my $vmfw_conf = $vmfw_configs->{$vmid};
2615         next if !$vmfw_conf;
2616         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2617
2618         foreach my $netid (keys %$conf) {
2619             next if $netid !~ m/^net(\d+)$/;
2620             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2621             next if !$net;
2622             my $iface = "tap${vmid}i$1";
2623
2624             my $macaddr = $net->{macaddr};
2625             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2626                                          $vmfw_conf, $vmid, 'IN');
2627             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2628                                          $vmfw_conf, $vmid, 'OUT');
2629         }
2630     }
2631
2632     # generate firewall rules for OpenVZ containers
2633     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2634         my $conf = $vmdata->{openvz}->{$vmid};
2635
2636         my $vmfw_conf = $vmfw_configs->{$vmid};
2637         next if !$vmfw_conf;
2638         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2639
2640         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2641             my $ip = $conf->{ip_address}->{value};
2642             $ip =~ s/\s/,/g;
2643             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2644             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2645         }
2646
2647         if ($conf->{netif} && $conf->{netif}->{value}) {
2648             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2649             foreach my $netid (keys %$netif) {
2650                 my $d = $netif->{$netid};
2651
2652                 my $macaddr = $d->{mac};
2653                 my $iface = $d->{host_ifname};
2654                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2655                                              $vmfw_conf, $vmid, 'IN');
2656                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2657                                              $vmfw_conf, $vmid, 'OUT');
2658             }
2659         }
2660     }
2661
2662     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2663         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2664     }
2665
2666     return ($ruleset, $ipset_ruleset);
2667 }
2668
2669 sub get_ruleset_status {
2670     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2671
2672     my $statushash = {};
2673
2674     foreach my $chain (sort keys %$ruleset) {
2675         my $sig = &$digest_fn($ruleset->{$chain});
2676
2677         $statushash->{$chain}->{sig} = $sig;
2678
2679         my $oldsig = $active_chains->{$chain};
2680         if (!defined($oldsig)) {
2681             $statushash->{$chain}->{action} = 'create';
2682         } else {
2683             if ($oldsig eq $sig) {
2684                 $statushash->{$chain}->{action} = 'exists';
2685             } else {
2686                 $statushash->{$chain}->{action} = 'update';
2687             }
2688         }
2689         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2690         foreach my $cmd (@{$ruleset->{$chain}}) {
2691             print "\t$cmd\n" if $verbose;
2692         }
2693     }
2694
2695     foreach my $chain (sort keys %$active_chains) {
2696         if (!defined($ruleset->{$chain})) {
2697             my $sig = $active_chains->{$chain};
2698             $statushash->{$chain}->{action} = 'delete';
2699             $statushash->{$chain}->{sig} = $sig;
2700             print "delete $chain ($sig)\n" if $verbose;
2701         }
2702     }
2703
2704     return $statushash;
2705 }
2706
2707 sub print_sig_rule {
2708     my ($chain, $sig) = @_;
2709
2710     # We just use this to store a SHA1 checksum used to detect changes
2711     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2712 }
2713
2714 sub get_ruleset_cmdlist {
2715     my ($ruleset, $verbose) = @_;
2716
2717     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2718
2719     my ($active_chains, $hooks) = iptables_get_chains();
2720     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2721
2722     # create missing chains first
2723     foreach my $chain (sort keys %$ruleset) {
2724         my $stat = $statushash->{$chain};
2725         die "internal error" if !$stat;
2726         next if $stat->{action} ne 'create';
2727
2728         $cmdlist .= ":$chain - [0:0]\n";
2729     }
2730
2731     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2732         if (!$hooks->{$h}) {
2733             $cmdlist .= "-A $h -j PVEFW-$h\n";
2734         }
2735     }
2736
2737     foreach my $chain (sort keys %$ruleset) {
2738         my $stat = $statushash->{$chain};
2739         die "internal error" if !$stat;
2740
2741         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2742             $cmdlist .= "-F $chain\n";
2743             foreach my $cmd (@{$ruleset->{$chain}}) {
2744                 $cmdlist .= "$cmd\n";
2745             }
2746             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2747         } elsif ($stat->{action} eq 'delete') {
2748             die "internal error"; # this should not happen
2749         } elsif ($stat->{action} eq 'exists') {
2750             # do nothing
2751         } else {
2752             die "internal error - unknown status '$stat->{action}'";
2753         }
2754     }
2755
2756     foreach my $chain (keys %$statushash) {
2757         next if $statushash->{$chain}->{action} ne 'delete';
2758         $cmdlist .= "-F $chain\n";
2759     }
2760     foreach my $chain (keys %$statushash) {
2761         next if $statushash->{$chain}->{action} ne 'delete';
2762         next if $chain eq 'PVEFW-INPUT';
2763         next if $chain eq 'PVEFW-OUTPUT';
2764         next if $chain eq 'PVEFW-FORWARD';
2765         $cmdlist .= "-X $chain\n";
2766     }
2767
2768     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2769
2770     $cmdlist .= "COMMIT\n";
2771
2772     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2773 }
2774
2775 sub get_ipset_cmdlist {
2776     my ($ruleset, $verbose) = @_;
2777
2778     my $cmdlist = "";
2779
2780     my $delete_cmdlist = "";
2781
2782     my $active_chains = ipset_get_chains();
2783     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2784
2785     # remove stale _swap chains
2786     foreach my $chain (keys %$active_chains) {
2787         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2788             $cmdlist .= "destroy $chain\n";
2789         }
2790     }
2791
2792     foreach my $chain (sort keys %$ruleset) {
2793         my $stat = $statushash->{$chain};
2794         die "internal error" if !$stat;
2795
2796         if ($stat->{action} eq 'create') {
2797             foreach my $cmd (@{$ruleset->{$chain}}) {
2798                 $cmdlist .= "$cmd\n";
2799             }
2800         }
2801
2802         if ($stat->{action} eq 'update') {
2803             my $chain_swap = $chain."_swap";
2804
2805             foreach my $cmd (@{$ruleset->{$chain}}) {
2806                 $cmd =~ s/$chain/$chain_swap/;
2807                 $cmdlist .= "$cmd\n";
2808             }
2809             $cmdlist .= "swap $chain_swap $chain\n";
2810             $cmdlist .= "flush $chain_swap\n";
2811             $cmdlist .= "destroy $chain_swap\n";
2812         }
2813
2814     }
2815
2816     foreach my $chain (keys %$statushash) {
2817         next if $statushash->{$chain}->{action} ne 'delete';
2818
2819         $delete_cmdlist .= "flush $chain\n";
2820         $delete_cmdlist .= "destroy $chain\n";
2821     }
2822
2823     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2824
2825     return ($cmdlist, $delete_cmdlist, $changes);
2826 }
2827
2828 sub apply_ruleset {
2829     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2830
2831     enable_bridge_firewall();
2832
2833     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2834         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2835
2836     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2837
2838     if ($verbose) {
2839         if ($ipset_changes) {
2840             print "ipset changes:\n";
2841             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2842             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2843         }
2844
2845         if ($changes) {
2846             print "iptables changes:\n";
2847             print $cmdlist;
2848         }
2849     }
2850
2851     ipset_restore_cmdlist($ipset_create_cmdlist);
2852
2853     iptables_restore_cmdlist($cmdlist);
2854
2855     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2856
2857     # test: re-read status and check if everything is up to date
2858     my $active_chains = iptables_get_chains();
2859     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2860
2861     my $errors;
2862     foreach my $chain (sort keys %$ruleset) {
2863         my $stat = $statushash->{$chain};
2864         if ($stat->{action} ne 'exists') {
2865             warn "unable to update chain '$chain'\n";
2866             $errors = 1;
2867         }
2868     }
2869
2870     die "unable to apply firewall changes\n" if $errors;
2871
2872     update_nf_conntrack_max($hostfw_conf);
2873
2874     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2875
2876 }
2877
2878 sub update_nf_conntrack_max {
2879     my ($hostfw_conf) = @_;
2880
2881     my $max = 65536; # reasonable default
2882
2883     my $options = $hostfw_conf->{options} || {};
2884
2885     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2886         $max = $options->{nf_conntrack_max};
2887         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2888     }
2889
2890     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2891     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2892
2893     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2894
2895     if ($current != $max) {
2896         my $hashsize = int($max/4);
2897         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2898         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2899     }
2900 }
2901
2902 sub update_nf_conntrack_tcp_timeout_established {
2903     my ($hostfw_conf) = @_;
2904
2905     my $options = $hostfw_conf->{options} || {};
2906
2907     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2908
2909     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2910 }
2911
2912 sub remove_pvefw_chains {
2913
2914     my ($chash, $hooks) = iptables_get_chains();
2915     my $cmdlist = "*filter\n";
2916
2917     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2918         if ($hooks->{$h}) {
2919             $cmdlist .= "-D $h -j PVEFW-$h\n";
2920         }
2921     }
2922
2923     foreach my $chain (keys %$chash) {
2924         $cmdlist .= "-F $chain\n";
2925     }
2926
2927     foreach my $chain (keys %$chash) {
2928         $cmdlist .= "-X $chain\n";
2929     }
2930     $cmdlist .= "COMMIT\n";
2931
2932     iptables_restore_cmdlist($cmdlist);
2933 }
2934
2935 sub update {
2936     my ($start, $verbose) = @_;
2937
2938     my $code = sub {
2939
2940         my $cluster_conf = load_clusterfw_conf();
2941         my $cluster_options = $cluster_conf->{options};
2942
2943         my $enable = $cluster_options->{enable};
2944
2945         my $status = read_pvefw_status();
2946
2947         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2948
2949         if (!$enable) {
2950             PVE::Firewall::remove_pvefw_chains();
2951             print "Firewall disabled\n" if $verbose;
2952             return;
2953         }
2954
2955         my $hostfw_conf = load_hostfw_conf();
2956
2957         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2958
2959         if ($start || $status eq 'active') {
2960
2961             save_pvefw_status('active') if ($status ne 'active');
2962
2963             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2964         } else {
2965             print "Firewall not active (status = $status)\n" if $verbose;
2966         }
2967     };
2968
2969     run_locked($code);
2970 }
2971
2972
2973 1;