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 $alias = lc($dest);
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, $cluster_conf, $loglevel) = @_;
1440
1441     if ($cluster_conf->{ipset}->{blacklist}){
1442         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1443         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1444     }
1445
1446     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1447         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1448     }
1449
1450     if ($options->{tcpflags}) {
1451         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1452     }
1453 }
1454
1455 sub ruleset_create_vm_chain {
1456     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1457
1458     ruleset_create_chain($ruleset, $chain);
1459     my $accept = generate_nfqueue($options);
1460
1461     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1462         if ($direction eq 'OUT') {
1463             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1464                                                       proto => 'udp', sport => 68, dport => 67 });
1465         } else {
1466             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1467                                                       proto => 'udp', sport => 67, dport => 68 });
1468         }
1469     }
1470
1471     if ($direction eq 'OUT') {
1472         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1473             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1474         }
1475         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1476     }
1477 }
1478
1479 sub ruleset_add_group_rule {
1480     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1481
1482     my $group = $rule->{action};
1483     my $group_chain = "GROUP-$group-$direction";
1484     if(!ruleset_chain_exist($ruleset, $group_chain)){
1485         generate_group_rules($ruleset, $cluster_conf, $group);
1486     }
1487     if ($rule->{iface}) {
1488         if ($direction eq 'OUT') {
1489             ruleset_addrule($ruleset, $chain, "-o $rule->{iface} -j $group_chain");
1490         } else {
1491             ruleset_addrule($ruleset, $chain, "-i $rule->{iface} -j $group_chain");
1492         }
1493     } else {
1494         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1495     }
1496
1497     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1498 }
1499
1500 sub ruleset_generate_vm_rules {
1501     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1502
1503     my $lc_direction = lc($direction);
1504
1505     my $in_accept = generate_nfqueue($options);
1506
1507     foreach my $rule (@$rules) {
1508         next if $rule->{iface} && $rule->{iface} ne $netid;
1509         next if !$rule->{enable};
1510         if ($rule->{type} eq 'group') {
1511             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1512                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1513         } else {
1514             next if $rule->{type} ne $lc_direction;
1515             eval {
1516                 if ($direction eq 'OUT') {
1517                     ruleset_generate_rule($ruleset, $chain, $rule,
1518                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1519                                           undef, $cluster_conf);
1520                 } else {
1521                     ruleset_generate_rule($ruleset, $chain, $rule,
1522                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1523                                           undef, $cluster_conf);
1524                 }
1525             };
1526             warn $@ if $@;
1527         }
1528     }
1529 }
1530
1531 sub generate_nfqueue {
1532     my ($options) = @_;
1533
1534     if ($options->{ips}) {
1535         my $action = "NFQUEUE";
1536         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1537             if (defined($3) && defined($1)) {
1538                 $action .= " --queue-balance $1:$3";
1539             } elsif (defined($1)) {
1540                 $action .= " --queue-num $1";
1541             }
1542         }
1543         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1544         return $action;
1545     } else {
1546         return "ACCEPT";
1547     }
1548 }
1549
1550 sub ruleset_generate_vm_ipsrules {
1551     my ($ruleset, $options, $direction, $iface) = @_;
1552
1553     if ($options->{ips} && $direction eq 'IN') {
1554         my $nfqueue = generate_nfqueue($options);
1555
1556         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1557             ruleset_create_chain($ruleset, "PVEFW-IPS");
1558         }
1559
1560         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1561     }
1562 }
1563
1564 sub generate_venet_rules_direction {
1565     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1566
1567     parse_address_list($ip); # make sure we have a valid $ip list
1568
1569     my $lc_direction = lc($direction);
1570
1571     my $rules = $vmfw_conf->{rules};
1572
1573     my $options = $vmfw_conf->{options};
1574     my $hostfw_options = $vmfw_conf->{options};
1575     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1576
1577     my $chain = "venet0-$vmid-$direction";
1578
1579     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1580
1581     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1582
1583     # implement policy
1584     my $policy;
1585
1586     if ($direction eq 'OUT') {
1587         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1588     } else {
1589         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1590     }
1591
1592     my $accept = generate_nfqueue($options);
1593     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1594     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1595
1596     if ($direction eq 'OUT') {
1597         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1598             action => $chain,
1599             source => $ip,
1600             iface_in => 'venet0'});
1601     } else {
1602         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1603             action => $chain,
1604             dest => $ip,
1605             iface_out => 'venet0'});
1606     }
1607 }
1608
1609 sub generate_tap_rules_direction {
1610     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1611
1612     my $lc_direction = lc($direction);
1613
1614     my $rules = $vmfw_conf->{rules};
1615
1616     my $options = $vmfw_conf->{options};
1617     my $hostfw_options = $hostfw_conf->{options};
1618     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1619
1620     my $tapchain = "$iface-$direction";
1621
1622     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1623
1624     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1625
1626     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1627
1628     # implement policy
1629     my $policy;
1630
1631     if ($direction eq 'OUT') {
1632         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1633     } else {
1634         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1635     }
1636
1637     my $accept = generate_nfqueue($options);
1638     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1639     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1640
1641     # plug the tap chain to bridge chain
1642     if ($direction eq 'IN') {
1643         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1644                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1645     } else {
1646         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1647                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1648     }
1649 }
1650
1651 sub enable_host_firewall {
1652     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1653
1654     my $options = $hostfw_conf->{options};
1655     my $cluster_options = $cluster_conf->{options};
1656     my $rules = $hostfw_conf->{rules};
1657     my $cluster_rules = $cluster_conf->{rules};
1658
1659     # host inbound firewall
1660     my $chain = "PVEFW-HOST-IN";
1661     ruleset_create_chain($ruleset, $chain);
1662
1663     my $loglevel = get_option_log_level($options, "log_level_in");
1664
1665     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1666
1667     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1668     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1669
1670     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1671     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1672     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1673
1674     # we use RETURN because we need to check also tap rules
1675     my $accept_action = 'RETURN';
1676
1677     # add host rules first, so that cluster wide rules can be overwritten
1678     foreach my $rule (@$rules, @$cluster_rules) {
1679         if ($rule->{type} eq 'group') {
1680             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1681         } elsif ($rule->{type} eq 'in') {
1682             $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1683             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1684                                   undef, $cluster_conf);
1685             delete $rule->{iface_in};
1686         }
1687     }
1688
1689     # implement input policy
1690     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1691     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1692
1693     # host outbound firewall
1694     $chain = "PVEFW-HOST-OUT";
1695     ruleset_create_chain($ruleset, $chain);
1696
1697     $loglevel = get_option_log_level($options, "log_level_out");
1698
1699     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1700
1701     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1702
1703     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1704     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1705     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1706
1707     # we use RETURN because we may want to check other thigs later
1708     $accept_action = 'RETURN';
1709
1710     # add host rules first, so that cluster wide rules can be overwritten
1711     foreach my $rule (@$rules, @$cluster_rules) {
1712         if ($rule->{type} eq 'group') {
1713             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1714         } elsif ($rule->{type} eq 'out') {
1715             $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1716             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1717                                   undef, $cluster_conf);
1718             delete $rule->{iface_out};
1719         }
1720     }
1721
1722     # implement output policy
1723     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1724     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1725
1726     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1727     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1728 }
1729
1730 sub generate_group_rules {
1731     my ($ruleset, $cluster_conf, $group) = @_;
1732     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1733
1734     my $rules = $cluster_conf->{groups}->{$group};
1735
1736     my $chain = "GROUP-${group}-IN";
1737
1738     ruleset_create_chain($ruleset, $chain);
1739     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1740
1741     foreach my $rule (@$rules) {
1742         next if $rule->{type} ne 'in';
1743         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1744     }
1745
1746     $chain = "GROUP-${group}-OUT";
1747
1748     ruleset_create_chain($ruleset, $chain);
1749     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1750
1751     foreach my $rule (@$rules) {
1752         next if $rule->{type} ne 'out';
1753         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1754         # check also other tap rules later
1755         ruleset_generate_rule($ruleset, $chain, $rule,
1756                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1757     }
1758 }
1759
1760 my $MAX_NETS = 32;
1761 my $valid_netdev_names = {};
1762 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1763     $valid_netdev_names->{"net$i"} = 1;
1764 }
1765
1766 sub parse_fw_rule {
1767     my ($line, $need_iface, $allow_groups) = @_;
1768
1769     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1770
1771     # we can add single line comments to the end of the rule
1772     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1773
1774     # we can disable a rule when prefixed with '|'
1775     my $enable = 1;
1776
1777     $enable = 0 if $line =~ s/^\|//;
1778
1779     my @data = split(/\s+/, $line);
1780     my $expected_elements = $need_iface ? 8 : 7;
1781
1782     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1783
1784     if ($need_iface) {
1785         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1786     } else {
1787         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1788     }
1789
1790     die "incomplete rule\n" if ! ($type && $action);
1791
1792     my $macro;
1793
1794     $type = lc($type);
1795
1796     if ($type eq  'in' || $type eq 'out') {
1797         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1798             # OK
1799         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1800             $action = $2;
1801             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1802             die "unknown macro '$1'\n" if !$preferred_name;
1803             $macro = $preferred_name;
1804         } else {
1805             die "unknown action '$action'\n";
1806         }
1807     } elsif ($type eq 'group') {
1808         die "wrong number of rule elements\n" if scalar(@data) > 3;
1809         die "groups disabled\n" if !$allow_groups;
1810
1811         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1812     } else {
1813         die "unknown rule type '$type'\n";
1814     }
1815
1816     if ($need_iface) {
1817         $iface = undef if $iface && $iface eq '-';
1818     }
1819
1820     $proto = undef if $proto && $proto eq '-';
1821     pve_fw_verify_protocol_spec($proto) if $proto;
1822
1823     $source = undef if $source && $source eq '-';
1824     $dest = undef if $dest && $dest eq '-';
1825
1826     $dport = undef if $dport && $dport eq '-';
1827     $sport = undef if $sport && $sport eq '-';
1828
1829     parse_port_name_number_or_range($dport) if defined($dport);
1830     parse_port_name_number_or_range($sport) if defined($sport);
1831
1832     parse_address_list($source) if $source;
1833     parse_address_list($dest) if $dest;
1834
1835     return {
1836         type => $type,
1837         enable => $enable,
1838         comment => $comment,
1839         action => $action,
1840         macro => $macro,
1841         iface => $iface,
1842         source => $source,
1843         dest => $dest,
1844         proto => $proto,
1845         dport => $dport,
1846         sport => $sport,
1847     };
1848 }
1849
1850 sub parse_vmfw_option {
1851     my ($line) = @_;
1852
1853     my ($opt, $value);
1854
1855     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1856
1857     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1858         $opt = lc($1);
1859         $value = int($2);
1860     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1861         $opt = lc($1);
1862         $value = $2 ? lc($3) : '';
1863     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1864         $opt = lc($1);
1865         $value = uc($3);
1866     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1867         $opt = lc($1);
1868         $value = $2;
1869     } else {
1870         chomp $line;
1871         die "can't parse option '$line'\n"
1872     }
1873
1874     return ($opt, $value);
1875 }
1876
1877 sub parse_hostfw_option {
1878     my ($line) = @_;
1879
1880     my ($opt, $value);
1881
1882     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1883
1884     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1885         $opt = lc($1);
1886         $value = int($2);
1887     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1888         $opt = lc($1);
1889         $value = $2 ? lc($3) : '';
1890     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1891         $opt = lc($1);
1892         $value = int($2);
1893     } else {
1894         chomp $line;
1895         die "can't parse option '$line'\n"
1896     }
1897
1898     return ($opt, $value);
1899 }
1900
1901 sub parse_clusterfw_option {
1902     my ($line) = @_;
1903
1904     my ($opt, $value);
1905
1906     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1907         $opt = lc($1);
1908         $value = int($2);
1909     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1910         $opt = lc($1);
1911         $value = uc($3);
1912     } else {
1913         chomp $line;
1914         die "can't parse option '$line'\n"
1915     }
1916
1917     return ($opt, $value);
1918 }
1919
1920 sub parse_clusterfw_alias {
1921     my ($line) = @_;
1922
1923     # we can add single line comments to the end of the line
1924     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1925
1926     if ($line =~ m/^(\S+)\s(\S+)$/) {
1927         my ($name, $cidr) = ($1, $2);
1928         $cidr =~ s|/32$||;
1929         pve_verify_ipv4_or_cidr($cidr);
1930         my $data = {
1931             name => $name,
1932             cidr => $cidr,
1933         };
1934         $data->{comment} = $comment  if $comment;
1935         return $data;
1936     }
1937
1938     return undef;
1939 }
1940
1941 sub parse_vm_fw_rules {
1942     my ($filename, $fh) = @_;
1943
1944     my $res = { rules => [], options => {}};
1945
1946     my $section;
1947
1948     while (defined(my $line = <$fh>)) {
1949         next if $line =~ m/^#/;
1950         next if $line =~ m/^\s*$/;
1951
1952         my $linenr = $fh->input_line_number();
1953         my $prefix = "$filename (line $linenr)";
1954
1955         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1956             $section = lc($1);
1957             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1958             next;
1959         }
1960         if (!$section) {
1961             warn "$prefix: skip line - no section";
1962             next;
1963         }
1964
1965         next if !$res->{$section}; # skip undefined section
1966
1967         if ($section eq 'options') {
1968             eval {
1969                 my ($opt, $value) = parse_vmfw_option($line);
1970                 $res->{options}->{$opt} = $value;
1971             };
1972             warn "$prefix: $@" if $@;
1973             next;
1974         }
1975
1976         my $rule;
1977         eval { $rule = parse_fw_rule($line, 1, 1); };
1978         if (my $err = $@) {
1979             warn "$prefix: $err";
1980             next;
1981         }
1982
1983         push @{$res->{$section}}, $rule;
1984     }
1985
1986     return $res;
1987 }
1988
1989 sub parse_host_fw_rules {
1990     my ($filename, $fh) = @_;
1991
1992     my $res = { rules => [], options => {}};
1993
1994     my $section;
1995
1996     while (defined(my $line = <$fh>)) {
1997         next if $line =~ m/^#/;
1998         next if $line =~ m/^\s*$/;
1999
2000         my $linenr = $fh->input_line_number();
2001         my $prefix = "$filename (line $linenr)";
2002
2003         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2004             $section = lc($1);
2005             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2006             next;
2007         }
2008         if (!$section) {
2009             warn "$prefix: skip line - no section";
2010             next;
2011         }
2012
2013         next if !$res->{$section}; # skip undefined section
2014
2015         if ($section eq 'options') {
2016             eval {
2017                 my ($opt, $value) = parse_hostfw_option($line);
2018                 $res->{options}->{$opt} = $value;
2019             };
2020             warn "$prefix: $@" if $@;
2021             next;
2022         }
2023
2024         my $rule;
2025         eval { $rule = parse_fw_rule($line, 1, 1); };
2026         if (my $err = $@) {
2027             warn "$prefix: $err";
2028             next;
2029         }
2030
2031         push @{$res->{$section}}, $rule;
2032     }
2033
2034     return $res;
2035 }
2036
2037 sub parse_cluster_fw_rules {
2038     my ($filename, $fh) = @_;
2039
2040     my $section;
2041     my $group;
2042
2043     my $res = {
2044         rules => [],
2045         options => {},
2046         aliases => {},
2047         groups => {},
2048         group_comments => {},
2049         ipset => {} ,
2050         ipset_comments => {},
2051     };
2052
2053     while (defined(my $line = <$fh>)) {
2054         next if $line =~ m/^#/;
2055         next if $line =~ m/^\s*$/;
2056
2057         my $linenr = $fh->input_line_number();
2058         my $prefix = "$filename (line $linenr)";
2059
2060         if ($line =~ m/^\[options\]$/i) {
2061             $section = 'options';
2062             next;
2063         }
2064
2065         if ($line =~ m/^\[aliases\]$/i) {
2066             $section = 'aliases';
2067             next;
2068         }
2069
2070         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2071             $section = 'groups';
2072             $group = lc($1);
2073             my $comment = $2;
2074             $res->{$section}->{$group} = [];
2075             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2076                 if $comment;
2077             next;
2078         }
2079
2080         if ($line =~ m/^\[rules\]$/i) {
2081             $section = 'rules';
2082             next;
2083         }
2084
2085         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2086             $section = 'ipset';
2087             $group = lc($1);
2088             my $comment = $2;
2089             $res->{$section}->{$group} = [];
2090             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2091                 if $comment;
2092             next;
2093         }
2094
2095         if (!$section) {
2096             warn "$prefix: skip line - no section\n";
2097             next;
2098         }
2099
2100         if ($section eq 'options') {
2101             eval {
2102                 my ($opt, $value) = parse_clusterfw_option($line);
2103                 $res->{options}->{$opt} = $value;
2104             };
2105             warn "$prefix: $@" if $@;
2106         } elsif ($section eq 'aliases') {
2107             eval {
2108                 my $data = parse_clusterfw_alias($line);
2109                 $res->{aliases}->{lc($data->{name})} = $data;
2110             };
2111             warn "$prefix: $@" if $@;
2112         } elsif ($section eq 'rules') {
2113             my $rule;
2114             eval { $rule = parse_fw_rule($line, 1, 1); };
2115             if (my $err = $@) {
2116                 warn "$prefix: $err";
2117                 next;
2118             }
2119             push @{$res->{$section}}, $rule;
2120         } elsif ($section eq 'groups') {
2121             my $rule;
2122             eval { $rule = parse_fw_rule($line, 0, 0); };
2123             if (my $err = $@) {
2124                 warn "$prefix: $err";
2125                 next;
2126             }
2127             push @{$res->{$section}->{$group}}, $rule;
2128         } elsif ($section eq 'ipset') {
2129             # we can add single line comments to the end of the rule
2130             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2131
2132             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2133             my $nomatch = $1;
2134             my $cidr = $2;
2135
2136             if($cidr !~ m/^${ip_alias_pattern}$/) {
2137                 $cidr =~ s|/32$||;
2138
2139                 eval { pve_verify_ipv4_or_cidr($cidr); };
2140                 if (my $err = $@) {
2141                     warn "$prefix: $cidr - $err";
2142                     next;
2143                 }
2144             }
2145
2146             my $entry = { cidr => $cidr };
2147             $entry->{nomatch} = 1 if $nomatch;
2148             $entry->{comment} = $comment if $comment;
2149
2150             push @{$res->{$section}->{$group}}, $entry;
2151         }
2152     }
2153
2154     return $res;
2155 }
2156
2157 sub run_locked {
2158     my ($code, @param) = @_;
2159
2160     my $timeout = 10;
2161
2162     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2163
2164     die $@ if $@;
2165
2166     return $res;
2167 }
2168
2169 sub read_local_vm_config {
2170
2171     my $openvz = {};
2172     my $qemu = {};
2173
2174     my $vmdata = { openvz => $openvz, qemu => $qemu };
2175
2176     my $vmlist = PVE::Cluster::get_vmlist();
2177     return $vmdata if !$vmlist || !$vmlist->{ids};
2178     my $ids = $vmlist->{ids};
2179
2180     foreach my $vmid (keys %$ids) {
2181         next if !$vmid; # skip VE0
2182         my $d = $ids->{$vmid};
2183         next if !$d->{node} || $d->{node} ne $nodename;
2184         next if !$d->{type};
2185         if ($d->{type} eq 'openvz') {
2186             if ($have_pve_manager) {
2187                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2188                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2189                     $openvz->{$vmid} = $conf;
2190                 }
2191             }
2192         } elsif ($d->{type} eq 'qemu') {
2193             if ($have_qemu_server) {
2194                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2195                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2196                     $qemu->{$vmid} = $conf;
2197                 }
2198             }
2199         }
2200     }
2201
2202     return $vmdata;
2203 };
2204
2205 sub load_vmfw_conf {
2206     my ($vmid, $dir) = @_;
2207
2208     my $vmfw_conf = {};
2209
2210     $dir = "/etc/pve/firewall" if !defined($dir);
2211
2212     my $filename = "$dir/$vmid.fw";
2213     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2214         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2215     }
2216
2217     return $vmfw_conf;
2218 }
2219
2220 my $format_rules = sub {
2221     my ($rules, $need_iface) = @_;
2222
2223     my $raw = '';
2224
2225     foreach my $rule (@$rules) {
2226         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2227             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2228             $raw .= uc($rule->{type});
2229             if ($rule->{macro}) {
2230                 $raw .= " $rule->{macro}($rule->{action})";
2231             } else {
2232                 $raw .= " " . $rule->{action};
2233             }
2234             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2235
2236             if ($rule->{type} ne  'group')  {
2237                 $raw .= " " . ($rule->{source} || '-');
2238                 $raw .= " " . ($rule->{dest} || '-');
2239                 $raw .= " " . ($rule->{proto} || '-');
2240                 $raw .= " " . ($rule->{dport} || '-');
2241                 $raw .= " " . ($rule->{sport} || '-');
2242             }
2243
2244             $raw .= " # " . encode('utf8', $rule->{comment})
2245                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2246             $raw .= "\n";
2247         } else {
2248             die "unknown rule type '$rule->{type}'";
2249         }
2250     }
2251
2252     return $raw;
2253 };
2254
2255 my $format_options = sub {
2256     my ($options) = @_;
2257
2258     my $raw = '';
2259
2260     $raw .= "[OPTIONS]\n\n";
2261     foreach my $opt (keys %$options) {
2262         $raw .= "$opt: $options->{$opt}\n";
2263     }
2264     $raw .= "\n";
2265
2266     return $raw;
2267 };
2268
2269 my $format_aliases = sub {
2270     my ($aliases) = @_;
2271
2272     my $raw = '';
2273
2274     $raw .= "[ALIASES]\n\n";
2275     foreach my $k (keys %$aliases) {
2276         my $e = $aliases->{$k};
2277         $raw .= "$e->{name} $e->{cidr}";
2278         $raw .= " # " . encode('utf8', $e->{comment})
2279             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2280         $raw .= "\n";
2281     }
2282     $raw .= "\n";
2283
2284     return $raw;
2285 };
2286
2287 my $format_ipset = sub {
2288     my ($options) = @_;
2289
2290     my $raw = '';
2291
2292     my $nethash = {};
2293     foreach my $entry (@$options) {
2294         $nethash->{$entry->{cidr}} = $entry;
2295     }
2296
2297     foreach my $cidr (sort keys %$nethash) {
2298         my $entry = $nethash->{$cidr};
2299         my $line = $entry->{nomatch} ? '!' : '';
2300         $line .= $entry->{cidr};
2301         $line .= " # " . encode('utf8', $entry->{comment})
2302             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2303         $raw .= "$line\n";
2304     }
2305
2306     return $raw;
2307 };
2308
2309 sub save_vmfw_conf {
2310     my ($vmid, $vmfw_conf) = @_;
2311
2312     my $raw = '';
2313
2314     my $options = $vmfw_conf->{options};
2315     $raw .= &$format_options($options) if scalar(keys %$options);
2316
2317     my $rules = $vmfw_conf->{rules} || [];
2318     if (scalar(@$rules)) {
2319         $raw .= "[RULES]\n\n";
2320         $raw .= &$format_rules($rules, 1);
2321         $raw .= "\n";
2322     }
2323
2324     my $filename = "/etc/pve/firewall/$vmid.fw";
2325     PVE::Tools::file_set_contents($filename, $raw);
2326 }
2327
2328 sub read_vm_firewall_configs {
2329     my ($vmdata, $dir) = @_;
2330
2331     my $vmfw_configs = {};
2332
2333     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2334         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2335         next if !$vmfw_conf->{options}; # skip if file does not exists
2336         $vmfw_configs->{$vmid} = $vmfw_conf;
2337     }
2338
2339     return $vmfw_configs;
2340 }
2341
2342 sub get_option_log_level {
2343     my ($options, $k) = @_;
2344
2345     my $v = $options->{$k};
2346     $v = $default_log_level if !defined($v);
2347
2348     return undef if $v eq '' || $v eq 'nolog';
2349
2350     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2351
2352     return $v if ($v >= 0) && ($v <= 7);
2353
2354     warn "unknown log level ($k = '$v')\n";
2355
2356     return undef;
2357 }
2358
2359 sub generate_std_chains {
2360     my ($ruleset, $options) = @_;
2361
2362     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2363
2364     # same as shorewall smurflog.
2365     my $chain = 'PVEFW-smurflog';
2366     $pve_std_chains->{$chain} = [];
2367
2368     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2369     push @{$pve_std_chains->{$chain}}, "-j DROP";
2370
2371     # same as shorewall logflags action.
2372     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2373     $chain = 'PVEFW-logflags';
2374     $pve_std_chains->{$chain} = [];
2375
2376     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2377     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2378     push @{$pve_std_chains->{$chain}}, "-j DROP";
2379
2380     foreach my $chain (keys %$pve_std_chains) {
2381         ruleset_create_chain($ruleset, $chain);
2382         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2383             if (ref($rule)) {
2384                 ruleset_generate_rule($ruleset, $chain, $rule);
2385             } else {
2386                 ruleset_addrule($ruleset, $chain, $rule);
2387             }
2388         }
2389     }
2390 }
2391
2392 sub generate_ipset_chains {
2393     my ($ipset_ruleset, $fw_conf) = @_;
2394
2395     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2396         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2397     }
2398 }
2399
2400 sub generate_ipset {
2401     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2402
2403     my $hashsize = scalar(@$options);
2404     if ($hashsize <= 64) {
2405         $hashsize = 64;
2406     } else {
2407         $hashsize = round_powerof2($hashsize);
2408     }
2409
2410     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2411
2412     # remove duplicates
2413     my $nethash = {};
2414     foreach my $entry (@$options) {
2415         my $cidr = $entry->{cidr};
2416         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2417             my $alias = lc($cidr);
2418             if ($aliases->{$alias}) {
2419                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2420                 $nethash->{$entry->{cidr}} = $entry;
2421             } else {
2422                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2423             }
2424         } else {
2425             $nethash->{$entry->{cidr}} = $entry;
2426         }
2427     }
2428
2429     foreach my $cidr (sort keys %$nethash) {
2430         my $entry = $nethash->{$cidr};
2431
2432         my $cmd = "add $name $cidr";
2433         if ($entry->{nomatch}) {
2434             if ($feature_ipset_nomatch) {
2435                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2436             } else {
2437                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2438             }
2439         } else {
2440             push @{$ipset_ruleset->{$name}}, $cmd;
2441         }
2442     }
2443 }
2444
2445 sub round_powerof2 {
2446     my ($int) = @_;
2447
2448     $int--;
2449     $int |= $int >> $_ foreach (1,2,4,8,16);
2450     return ++$int;
2451 }
2452
2453 sub save_pvefw_status {
2454     my ($status) = @_;
2455
2456     die "unknown status '$status' - internal error"
2457         if $status !~ m/^(stopped|active)$/;
2458
2459     mkdir dirname($pve_fw_status_filename);
2460     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2461 }
2462
2463 sub read_pvefw_status {
2464
2465     my $status = 'unknown';
2466
2467     return 'stopped' if ! -f $pve_fw_status_filename;
2468
2469     eval {
2470         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2471     };
2472     warn $@ if $@;
2473
2474     return $status;
2475 }
2476
2477 sub load_clusterfw_conf {
2478     my ($filename) = @_;
2479
2480     $filename = $clusterfw_conf_filename if !defined($filename);
2481
2482     my $cluster_conf = {};
2483     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2484         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2485     }
2486
2487     return $cluster_conf;
2488 }
2489
2490 sub save_clusterfw_conf {
2491     my ($cluster_conf) = @_;
2492
2493     my $raw = '';
2494
2495     my $options = $cluster_conf->{options};
2496     $raw .= &$format_options($options) if scalar(keys %$options);
2497
2498     my $aliases = $cluster_conf->{aliases};
2499     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2500
2501     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2502         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2503             my $utf8comment = encode('utf8', $comment);
2504             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2505         } else {
2506             $raw .= "[IPSET $ipset]\n\n";
2507         }
2508         my $options = $cluster_conf->{ipset}->{$ipset};
2509         $raw .= &$format_ipset($options);
2510         $raw .= "\n";
2511     }
2512
2513     my $rules = $cluster_conf->{rules};
2514     if (scalar(@$rules)) {
2515         $raw .= "[RULES]\n\n";
2516         $raw .= &$format_rules($rules, 1);
2517         $raw .= "\n";
2518     }
2519
2520     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2521         my $rules = $cluster_conf->{groups}->{$group};
2522         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2523             my $utf8comment = encode('utf8', $comment);
2524             $raw .= "[group $group] # $utf8comment\n\n";
2525         } else {
2526             $raw .= "[group $group]\n\n";
2527         }
2528
2529         $raw .= &$format_rules($rules, 0);
2530         $raw .= "\n";
2531     }
2532
2533     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2534 }
2535
2536 sub load_hostfw_conf {
2537     my ($filename) = @_;
2538
2539     $filename = $hostfw_conf_filename if !defined($filename);
2540
2541     my $hostfw_conf = {};
2542     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2543         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2544     }
2545     return $hostfw_conf;
2546 }
2547
2548 sub save_hostfw_conf {
2549     my ($hostfw_conf) = @_;
2550
2551     my $raw = '';
2552
2553     my $options = $hostfw_conf->{options};
2554     $raw .= &$format_options($options) if scalar(keys %$options);
2555
2556     my $rules = $hostfw_conf->{rules};
2557     if (scalar(@$rules)) {
2558         $raw .= "[RULES]\n\n";
2559         $raw .= &$format_rules($rules, 1);
2560         $raw .= "\n";
2561     }
2562
2563     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2564 }
2565
2566 sub compile {
2567     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2568
2569     my $vmfw_configs;
2570
2571     if ($vmdata) { # test mode
2572         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2573         my $filename = "$testdir/cluster.fw";
2574         die "missing test file '$filename'\n" if ! -f $filename;
2575         $cluster_conf = load_clusterfw_conf($filename);
2576
2577         $filename = "$testdir/host.fw";
2578         die "missing test file '$filename'\n" if ! -f $filename;
2579         $hostfw_conf = load_hostfw_conf($filename);
2580
2581         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2582     } else { # normal operation
2583         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2584
2585         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2586
2587         $vmdata = read_local_vm_config();
2588         $vmfw_configs = read_vm_firewall_configs($vmdata);
2589     }
2590
2591
2592     my $ipset_ruleset = {};
2593     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2594
2595     my $ruleset = {};
2596
2597     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2598     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2599
2600     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2601
2602     my $hostfw_options = $hostfw_conf->{options} || {};
2603
2604     # fixme: what log level should we use here?
2605     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2606
2607     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2608
2609     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2610     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j PVEFW-VENET-OUT");
2611     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -j PVEFW-VENET-OUT");
2612
2613     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2614     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2615
2616     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2617
2618     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2619     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2620
2621     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2622     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2623
2624     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -j PVEFW-VENET-IN");
2625
2626     generate_std_chains($ruleset, $hostfw_options);
2627
2628     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2629
2630     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2631
2632     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -j PVEFW-VENET-IN");
2633
2634     # generate firewall rules for QEMU VMs
2635     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2636         my $conf = $vmdata->{qemu}->{$vmid};
2637         my $vmfw_conf = $vmfw_configs->{$vmid};
2638         next if !$vmfw_conf;
2639         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2640
2641         foreach my $netid (keys %$conf) {
2642             next if $netid !~ m/^net(\d+)$/;
2643             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2644             next if !$net->{firewall};
2645             my $iface = "tap${vmid}i$1";
2646
2647             my $macaddr = $net->{macaddr};
2648             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2649                                          $vmfw_conf, $vmid, 'IN');
2650             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2651                                          $vmfw_conf, $vmid, 'OUT');
2652         }
2653     }
2654
2655     # generate firewall rules for OpenVZ containers
2656     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2657         my $conf = $vmdata->{openvz}->{$vmid};
2658
2659         my $vmfw_conf = $vmfw_configs->{$vmid};
2660         next if !$vmfw_conf;
2661         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2662
2663         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2664             my $ip = $conf->{ip_address}->{value};
2665             $ip =~ s/\s+/,/g;
2666             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2667             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2668         }
2669
2670         if ($conf->{netif} && $conf->{netif}->{value}) {
2671             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2672             foreach my $netid (keys %$netif) {
2673                 my $d = $netif->{$netid};
2674
2675                 my $macaddr = $d->{mac};
2676                 my $iface = $d->{host_ifname};
2677                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2678                                              $vmfw_conf, $vmid, 'IN');
2679                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2680                                              $vmfw_conf, $vmid, 'OUT');
2681             }
2682         }
2683     }
2684
2685     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2686         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2687     }
2688
2689     return ($ruleset, $ipset_ruleset);
2690 }
2691
2692 sub get_ruleset_status {
2693     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2694
2695     my $statushash = {};
2696
2697     foreach my $chain (sort keys %$ruleset) {
2698         my $sig = &$digest_fn($ruleset->{$chain});
2699
2700         $statushash->{$chain}->{sig} = $sig;
2701
2702         my $oldsig = $active_chains->{$chain};
2703         if (!defined($oldsig)) {
2704             $statushash->{$chain}->{action} = 'create';
2705         } else {
2706             if ($oldsig eq $sig) {
2707                 $statushash->{$chain}->{action} = 'exists';
2708             } else {
2709                 $statushash->{$chain}->{action} = 'update';
2710             }
2711         }
2712         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2713         foreach my $cmd (@{$ruleset->{$chain}}) {
2714             print "\t$cmd\n" if $verbose;
2715         }
2716     }
2717
2718     foreach my $chain (sort keys %$active_chains) {
2719         if (!defined($ruleset->{$chain})) {
2720             my $sig = $active_chains->{$chain};
2721             $statushash->{$chain}->{action} = 'delete';
2722             $statushash->{$chain}->{sig} = $sig;
2723             print "delete $chain ($sig)\n" if $verbose;
2724         }
2725     }
2726
2727     return $statushash;
2728 }
2729
2730 sub print_sig_rule {
2731     my ($chain, $sig) = @_;
2732
2733     # We just use this to store a SHA1 checksum used to detect changes
2734     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2735 }
2736
2737 sub get_ruleset_cmdlist {
2738     my ($ruleset, $verbose) = @_;
2739
2740     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2741
2742     my ($active_chains, $hooks) = iptables_get_chains();
2743     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2744
2745     # create missing chains first
2746     foreach my $chain (sort keys %$ruleset) {
2747         my $stat = $statushash->{$chain};
2748         die "internal error" if !$stat;
2749         next if $stat->{action} ne 'create';
2750
2751         $cmdlist .= ":$chain - [0:0]\n";
2752     }
2753
2754     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2755         if (!$hooks->{$h}) {
2756             $cmdlist .= "-A $h -j PVEFW-$h\n";
2757         }
2758     }
2759
2760     foreach my $chain (sort keys %$ruleset) {
2761         my $stat = $statushash->{$chain};
2762         die "internal error" if !$stat;
2763
2764         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2765             $cmdlist .= "-F $chain\n";
2766             foreach my $cmd (@{$ruleset->{$chain}}) {
2767                 $cmdlist .= "$cmd\n";
2768             }
2769             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2770         } elsif ($stat->{action} eq 'delete') {
2771             die "internal error"; # this should not happen
2772         } elsif ($stat->{action} eq 'exists') {
2773             # do nothing
2774         } else {
2775             die "internal error - unknown status '$stat->{action}'";
2776         }
2777     }
2778
2779     foreach my $chain (keys %$statushash) {
2780         next if $statushash->{$chain}->{action} ne 'delete';
2781         $cmdlist .= "-F $chain\n";
2782     }
2783     foreach my $chain (keys %$statushash) {
2784         next if $statushash->{$chain}->{action} ne 'delete';
2785         next if $chain eq 'PVEFW-INPUT';
2786         next if $chain eq 'PVEFW-OUTPUT';
2787         next if $chain eq 'PVEFW-FORWARD';
2788         $cmdlist .= "-X $chain\n";
2789     }
2790
2791     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2792
2793     $cmdlist .= "COMMIT\n";
2794
2795     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2796 }
2797
2798 sub get_ipset_cmdlist {
2799     my ($ruleset, $verbose) = @_;
2800
2801     my $cmdlist = "";
2802
2803     my $delete_cmdlist = "";
2804
2805     my $active_chains = ipset_get_chains();
2806     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2807
2808     # remove stale _swap chains
2809     foreach my $chain (keys %$active_chains) {
2810         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2811             $cmdlist .= "destroy $chain\n";
2812         }
2813     }
2814
2815     foreach my $chain (sort keys %$ruleset) {
2816         my $stat = $statushash->{$chain};
2817         die "internal error" if !$stat;
2818
2819         if ($stat->{action} eq 'create') {
2820             foreach my $cmd (@{$ruleset->{$chain}}) {
2821                 $cmdlist .= "$cmd\n";
2822             }
2823         }
2824
2825         if ($stat->{action} eq 'update') {
2826             my $chain_swap = $chain."_swap";
2827
2828             foreach my $cmd (@{$ruleset->{$chain}}) {
2829                 $cmd =~ s/$chain/$chain_swap/;
2830                 $cmdlist .= "$cmd\n";
2831             }
2832             $cmdlist .= "swap $chain_swap $chain\n";
2833             $cmdlist .= "flush $chain_swap\n";
2834             $cmdlist .= "destroy $chain_swap\n";
2835         }
2836
2837     }
2838
2839     foreach my $chain (keys %$statushash) {
2840         next if $statushash->{$chain}->{action} ne 'delete';
2841
2842         $delete_cmdlist .= "flush $chain\n";
2843         $delete_cmdlist .= "destroy $chain\n";
2844     }
2845
2846     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2847
2848     return ($cmdlist, $delete_cmdlist, $changes);
2849 }
2850
2851 sub apply_ruleset {
2852     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2853
2854     enable_bridge_firewall();
2855
2856     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2857         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2858
2859     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2860
2861     if ($verbose) {
2862         if ($ipset_changes) {
2863             print "ipset changes:\n";
2864             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2865             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2866         }
2867
2868         if ($changes) {
2869             print "iptables changes:\n";
2870             print $cmdlist;
2871         }
2872     }
2873
2874     ipset_restore_cmdlist($ipset_create_cmdlist);
2875
2876     iptables_restore_cmdlist($cmdlist);
2877
2878     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2879
2880     # test: re-read status and check if everything is up to date
2881     my $active_chains = iptables_get_chains();
2882     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2883
2884     my $errors;
2885     foreach my $chain (sort keys %$ruleset) {
2886         my $stat = $statushash->{$chain};
2887         if ($stat->{action} ne 'exists') {
2888             warn "unable to update chain '$chain'\n";
2889             $errors = 1;
2890         }
2891     }
2892
2893     die "unable to apply firewall changes\n" if $errors;
2894
2895     update_nf_conntrack_max($hostfw_conf);
2896
2897     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2898
2899 }
2900
2901 sub update_nf_conntrack_max {
2902     my ($hostfw_conf) = @_;
2903
2904     my $max = 65536; # reasonable default
2905
2906     my $options = $hostfw_conf->{options} || {};
2907
2908     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2909         $max = $options->{nf_conntrack_max};
2910         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2911     }
2912
2913     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2914     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2915
2916     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2917
2918     if ($current != $max) {
2919         my $hashsize = int($max/4);
2920         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2921         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2922     }
2923 }
2924
2925 sub update_nf_conntrack_tcp_timeout_established {
2926     my ($hostfw_conf) = @_;
2927
2928     my $options = $hostfw_conf->{options} || {};
2929
2930     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2931
2932     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2933 }
2934
2935 sub remove_pvefw_chains {
2936
2937     my ($chash, $hooks) = iptables_get_chains();
2938     my $cmdlist = "*filter\n";
2939
2940     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2941         if ($hooks->{$h}) {
2942             $cmdlist .= "-D $h -j PVEFW-$h\n";
2943         }
2944     }
2945
2946     foreach my $chain (keys %$chash) {
2947         $cmdlist .= "-F $chain\n";
2948     }
2949
2950     foreach my $chain (keys %$chash) {
2951         $cmdlist .= "-X $chain\n";
2952     }
2953     $cmdlist .= "COMMIT\n";
2954
2955     iptables_restore_cmdlist($cmdlist);
2956 }
2957
2958 sub update {
2959     my ($start, $verbose) = @_;
2960
2961     my $code = sub {
2962
2963         my $cluster_conf = load_clusterfw_conf();
2964         my $cluster_options = $cluster_conf->{options};
2965
2966         my $enable = $cluster_options->{enable};
2967
2968         my $status = read_pvefw_status();
2969
2970         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2971
2972         if (!$enable) {
2973             PVE::Firewall::remove_pvefw_chains();
2974             print "Firewall disabled\n" if $verbose;
2975             return;
2976         }
2977
2978         my $hostfw_conf = load_hostfw_conf();
2979
2980         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2981
2982         if ($start || $status eq 'active') {
2983
2984             save_pvefw_status('active') if ($status ne 'active');
2985
2986             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2987         } else {
2988             print "Firewall not active (status = $status)\n" if $verbose;
2989         }
2990     };
2991
2992     run_locked($code);
2993 }
2994
2995
2996 1;