src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'nolog'; # avoid logs by default
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162     ],
 163     'DNS' => [
 164         "Domain Name System traffic (upd and tcp)",
 165         { action => 'PARAM', proto => 'udp', dport => '53' },
 166         { action => 'PARAM', proto => 'tcp', dport => '53' },
 167     ],
 168     'Distcc' => [
 169         "Distributed Compiler service",
 170         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 171     ],
 172     'FTP' => [
 173         "File Transfer Protocol",
 174         { action => 'PARAM', proto => 'tcp', dport => '21' },
 175     ],
 176     'Finger' => [
 177         "Finger protocol (RFC 742)",
 178         { action => 'PARAM', proto => 'tcp', dport => '79' },
 179     ],
 180     'GNUnet' => [
 181         "GNUnet secure peer-to-peer networking traffic",
 182         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 183         { action => 'PARAM', proto => 'udp', dport => '2086' },
 184         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 185         { action => 'PARAM', proto => 'udp', dport => '1080' },
 186     ],
 187     'GRE' => [
 188         "Generic Routing Encapsulation tunneling protocol",
 189         { action => 'PARAM', proto => '47' },
 190     ],
 191     'Git' => [
 192         "Git distributed revision control traffic",
 193         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 194     ],
 195     'HKP' => [
 196         "OpenPGP HTTP keyserver protocol traffic",
 197         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 198     ],
 199     'HTTP' => [
 200         "Hypertext Transfer Protocol (WWW)",
 201         { action => 'PARAM', proto => 'tcp', dport => '80' },
 202     ],
 203     'HTTPS' => [
 204         "Hypertext Transfer Protocol (WWW) over SSL",
 205         { action => 'PARAM', proto => 'tcp', dport => '443' },
 206     ],
 207     'ICPV2' => [
 208         "Internet Cache Protocol V2 (Squid) traffic",
 209         { action => 'PARAM', proto => 'udp', dport => '3130' },
 210     ],
 211     'ICQ' => [
 212         "AOL Instant Messenger traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 214     ],
 215     'IMAP' => [
 216         "Internet Message Access Protocol",
 217         { action => 'PARAM', proto => 'tcp', dport => '143' },
 218     ],
 219     'IMAPS' => [
 220         "Internet Message Access Protocol over SSL",
 221         { action => 'PARAM', proto => 'tcp', dport => '993' },
 222     ],
 223     'IPIP' => [
 224         "IPIP capsulation traffic",
 225         { action => 'PARAM', proto => '94' },
 226     ],
 227     'IPsec' => [
 228         "IPsec traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 230         { action => 'PARAM', proto => '50' },
 231     ],
 232     'IPsecah' => [
 233         "IPsec authentication (AH) traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242     ],
 243     'IRC' => [
 244         "Internet Relay Chat traffic",
 245         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 246     ],
 247     'Jetdirect' => [
 248         "HP Jetdirect printing",
 249         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 250     ],
 251     'L2TP' => [
 252         "Layer 2 Tunneling Protocol traffic",
 253         { action => 'PARAM', proto => 'udp', dport => '1701' },
 254     ],
 255     'LDAP' => [
 256         "Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '389' },
 258     ],
 259     'LDAPS' => [
 260         "Secure Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '636' },
 262     ],
 263     'MSNP' => [
 264         "Microsoft Notification Protocol",
 265         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 266     ],
 267     'MSSQL' => [
 268         "Microsoft SQL Server",
 269         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 270     ],
 271     'Mail' => [
 272         "Mail traffic (SMTP, SMTPS, Submission)",
 273         { action => 'PARAM', proto => 'tcp', dport => '25' },
 274         { action => 'PARAM', proto => 'tcp', dport => '465' },
 275         { action => 'PARAM', proto => 'tcp', dport => '587' },
 276     ],
 277     'Munin' => [
 278         "Munin networked resource monitoring traffic",
 279         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 280     ],
 281     'MySQL' => [
 282         "MySQL server",
 283         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 284     ],
 285     'NNTP' => [
 286         "NNTP traffic (Usenet).",
 287         { action => 'PARAM', proto => 'tcp', dport => '119' },
 288     ],
 289     'NNTPS' => [
 290         "Encrypted NNTP traffic (Usenet)",
 291         { action => 'PARAM', proto => 'tcp', dport => '563' },
 292     ],
 293     'NTP' => [
 294         "Network Time Protocol (ntpd)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296     ],
 297     'OSPF' => [
 298         "OSPF multicast traffic",
 299         { action => 'PARAM', proto => '89' },
 300     ],
 301     'OpenVPN' => [
 302         "OpenVPN traffic",
 303         { action => 'PARAM', proto => 'udp', dport => '1194' },
 304     ],
 305     'PCA' => [
 306         "Symantec PCAnywere (tm)",
 307         { action => 'PARAM', proto => 'udp', dport => '5632' },
 308         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 309     ],
 310     'POP3' => [
 311         "POP3 traffic",
 312         { action => 'PARAM', proto => 'tcp', dport => '110' },
 313     ],
 314     'POP3S' => [
 315         "Encrypted POP3 traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '995' },
 317     ],
 318     'PPtP' => [
 319         "Point-to-Point Tunneling Protocol",
 320         { action => 'PARAM', proto => '47' },
 321         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 322     ],
 323     'Ping' => [
 324         "ICMP echo request",
 325         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 326     ],
 327     'PostgreSQL' => [
 328         "PostgreSQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 330     ],
 331     'Printer' => [
 332         "Line Printer protocol printing",
 333         { action => 'PARAM', proto => 'tcp', dport => '515' },
 334     ],
 335     'RDP' => [
 336         "Microsoft Remote Desktop Protocol traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 338     ],
 339     'RIP' => [
 340         "Routing Information Protocol (bidirectional)",
 341         { action => 'PARAM', proto => 'udp', dport => '520' },
 342     ],
 343     'RNDC' => [
 344         "BIND remote management protocol",
 345         { action => 'PARAM', proto => 'tcp', dport => '953' },
 346     ],
 347     'Razor' => [
 348         "Razor Antispam System",
 349         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 350     ],
 351     'Rdate' => [
 352         "Remote time retrieval (rdate)",
 353         { action => 'PARAM', proto => 'tcp', dport => '37' },
 354     ],
 355     'Rsync' => [
 356         "Rsync server",
 357         { action => 'PARAM', proto => 'tcp', dport => '873' },
 358     ],
 359     'SANE' => [
 360         "SANE network scanning",
 361         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 362     ],
 363     'SMB' => [
 364         "Microsoft SMB traffic",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369     ],
 370     'SMBswat' => [
 371         "Samba Web Administration Tool",
 372         { action => 'PARAM', proto => 'tcp', dport => '901' },
 373     ],
 374     'SMTP' => [
 375         "Simple Mail Transfer Protocol",
 376         { action => 'PARAM', proto => 'tcp', dport => '25' },
 377     ],
 378     'SMTPS' => [
 379         "Encrypted Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '465' },
 381     ],
 382     'SNMP' => [
 383         "Simple Network Management Protocol",
 384         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 385         { action => 'PARAM', proto => 'tcp', dport => '161' },
 386     ],
 387     'SPAMD' => [
 388         "Spam Assassin SPAMD traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '783' },
 390     ],
 391     'SSH' => [
 392         "Secure shell traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '22' },
 394     ],
 395     'SVN' => [
 396         "Subversion server (svnserve)",
 397         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 398     ],
 399     'SixXS' => [
 400         "SixXS IPv6 Deployment and Tunnel Broker",
 401         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 402         { action => 'PARAM', proto => 'udp', dport => '3740' },
 403         { action => 'PARAM', proto => '41' },
 404         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 405     ],
 406     'Squid' => [
 407         "Squid web proxy traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 409     ],
 410     'Submission' => [
 411         "Mail message submission traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '587' },
 413     ],
 414     'Syslog' => [
 415         "Syslog protocol (RFC 5424) traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '514' },
 417         { action => 'PARAM', proto => 'tcp', dport => '514' },
 418     ],
 419     'TFTP' => [
 420         "Trivial File Transfer Protocol traffic",
 421         { action => 'PARAM', proto => 'udp', dport => '69' },
 422     ],
 423     'Telnet' => [
 424         "Telnet traffic",
 425         { action => 'PARAM', proto => 'tcp', dport => '23' },
 426     ],
 427     'Telnets' => [
 428         "Telnet over SSL",
 429         { action => 'PARAM', proto => 'tcp', dport => '992' },
 430     ],
 431     'Time' => [
 432         "RFC 868 Time protocol",
 433         { action => 'PARAM', proto => 'tcp', dport => '37' },
 434     ],
 435     'Trcrt' => [
 436         "Traceroute (for up to 30 hops) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 438         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 439     ],
 440     'VNC' => [
 441         "VNC traffic for VNC display's 0 - 99",
 442         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 443     ],
 444     'VNCL' => [
 445         "VNC traffic from Vncservers to Vncviewers in listen mode",
 446         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 447     ],
 448     'Web' => [
 449         "WWW traffic (HTTP and HTTPS)",
 450         { action => 'PARAM', proto => 'tcp', dport => '80' },
 451         { action => 'PARAM', proto => 'tcp', dport => '443' },
 452     ],
 453     'Webcache' => [
 454         "Web Cache/Proxy traffic (port 8080)",
 455         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 456     ],
 457     'Webmin' => [
 458         "Webmin traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 460     ],
 461     'Whois' => [
 462         "Whois (nicname, RFC 3912) traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '43' },
 464     ],
 465 };
 466
 467 my $pve_fw_parsed_macros;
 468 my $pve_fw_macro_descr;
 469 my $pve_fw_preferred_macro_names = {};
 470
 471 my $pve_std_chains = {
 472     'PVEFW-SET-ACCEPT-MARK' => [
 473         "-j MARK --set-mark 1",
 474     ],
 475     'PVEFW-DropBroadcast' => [
 476         # same as shorewall 'Broadcast'
 477         # simply DROP BROADCAST/MULTICAST/ANYCAST
 478         # we can use this to reduce logging
 479         { action => 'DROP', dsttype => 'BROADCAST' },
 480         { action => 'DROP', dsttype => 'MULTICAST' },
 481         { action => 'DROP', dsttype => 'ANYCAST' },
 482         { action => 'DROP', dest => '224.0.0.0/4' },
 483     ],
 484     'PVEFW-reject' => [
 485         # same as shorewall 'reject'
 486         { action => 'DROP', dsttype => 'BROADCAST' },
 487         { action => 'DROP', source => '224.0.0.0/4' },
 488         { action => 'DROP', proto => 'icmp' },
 489         "-p tcp -j REJECT --reject-with tcp-reset",
 490         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 491         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 492         "-j REJECT --reject-with icmp-host-prohibited",
 493     ],
 494     'PVEFW-Drop' => [
 495         # same as shorewall 'Drop', which is equal to DROP,
 496         # but REJECT/DROP some packages to reduce logging,
 497         # and ACCEPT critical ICMP types
 498         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 499         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 500         { action => 'PVEFW-DropBroadcast' },
 501         # ACCEPT critical ICMP types
 502         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 503         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 504         # Drop packets with INVALID state
 505         "-m conntrack --ctstate INVALID -j DROP",
 506         # Drop Microsoft SMB noise
 507         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 508         { action => 'DROP', proto => 'udp', dport => '137:139'},
 509         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 510         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 511         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 512         # Drop new/NotSyn traffic so that it doesn't get logged
 513         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 514         # Drop DNS replies
 515         { action => 'DROP', proto => 'udp', sport => 53 },
 516     ],
 517     'PVEFW-Reject' => [
 518         # same as shorewall 'Reject', which is equal to Reject,
 519         # but REJECT/DROP some packages to reduce logging,
 520         # and ACCEPT critical ICMP types
 521         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 522         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 523         { action => 'PVEFW-DropBroadcast' },
 524         # ACCEPT critical ICMP types
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 526         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 527         # Drop packets with INVALID state
 528         "-m conntrack --ctstate INVALID -j DROP",
 529         # Drop Microsoft SMB noise
 530         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 531         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 532         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 533         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 534         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 535         # Drop new/NotSyn traffic so that it doesn't get logged
 536         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 537         # Drop DNS replies
 538         { action => 'DROP', proto => 'udp', sport => 53 },
 539     ],
 540     'PVEFW-tcpflags' => [
 541         # same as shorewall tcpflags action.
 542         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 543         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 544         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 545         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 546         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 547         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 548     ],
 549     'PVEFW-smurfs' => [
 550         # same as shorewall smurfs action
 551         # Filter packets for smurfs (packets with a broadcast address as the source).
 552         "-s 0.0.0.0/32 -j RETURN",
 553         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 554         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 555     ],
 556 };
 557
 558 # iptables -p icmp -h
 559 my $icmp_type_names = {
 560     any => 1,
 561     'echo-reply' => 1,
 562     'destination-unreachable' => 1,
 563     'network-unreachable' => 1,
 564     'host-unreachable' => 1,
 565     'protocol-unreachable' => 1,
 566     'port-unreachable' => 1,
 567     'fragmentation-needed' => 1,
 568     'source-route-failed' => 1,
 569     'network-unknown' => 1,
 570     'host-unknown' => 1,
 571     'network-prohibited' => 1,
 572     'host-prohibited' => 1,
 573     'TOS-network-unreachable' => 1,
 574     'TOS-host-unreachable' => 1,
 575     'communication-prohibited' => 1,
 576     'host-precedence-violation' => 1,
 577     'precedence-cutoff' => 1,
 578     'source-quench' => 1,
 579     'redirect' => 1,
 580     'network-redirect' => 1,
 581     'host-redirect' => 1,
 582     'TOS-network-redirect' => 1,
 583     'TOS-host-redirect' => 1,
 584     'echo-request' => 1,
 585     'router-advertisement' => 1,
 586     'router-solicitation' => 1,
 587     'time-exceeded' => 1,
 588     'ttl-zero-during-transit' => 1,
 589     'ttl-zero-during-reassembly' => 1,
 590     'parameter-problem' => 1,
 591     'ip-header-bad' => 1,
 592     'required-option-missing' => 1,
 593     'timestamp-request' => 1,
 594     'timestamp-reply' => 1,
 595     'address-mask-request' => 1,
 596     'address-mask-reply' => 1,
 597 };
 598
 599 sub init_firewall_macros {
 600
 601     $pve_fw_parsed_macros = {};
 602
 603     foreach my $k (keys %$pve_fw_macros) {
 604         my $lc_name = lc($k);
 605         my $macro = $pve_fw_macros->{$k};
 606         if (!ref($macro->[0])) {
 607             $pve_fw_macro_descr->{$k} = shift @$macro;
 608         }
 609         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 610         $pve_fw_parsed_macros->{$k} = $macro;
 611     }
 612 }
 613
 614 init_firewall_macros();
 615
 616 sub get_macros {
 617     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 618 }
 619
 620 my $etc_services;
 621
 622 sub get_etc_services {
 623
 624     return $etc_services if $etc_services;
 625
 626     my $filename = "/etc/services";
 627
 628     my $fh = IO::File->new($filename, O_RDONLY);
 629     if (!$fh) {
 630         warn "unable to read '$filename' - $!\n";
 631         return {};
 632     }
 633
 634     my $services = {};
 635
 636     while (my $line = <$fh>) {
 637         chomp ($line);
 638         next if $line =~m/^#/;
 639         next if ($line =~m/^\s*$/);
 640
 641         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 642             $services->{byid}->{$2}->{name} = $1;
 643             $services->{byid}->{$2}->{port} = $2;
 644             $services->{byid}->{$2}->{$3} = 1;
 645             $services->{byname}->{$1} = $services->{byid}->{$2};
 646         }
 647     }
 648
 649     close($fh);
 650
 651     $etc_services = $services;
 652
 653
 654     return $etc_services;
 655 }
 656
 657 my $etc_protocols;
 658
 659 sub get_etc_protocols {
 660     return $etc_protocols if $etc_protocols;
 661
 662     my $filename = "/etc/protocols";
 663
 664     my $fh = IO::File->new($filename, O_RDONLY);
 665     if (!$fh) {
 666         warn "unable to read '$filename' - $!\n";
 667         return {};
 668     }
 669
 670     my $protocols = {};
 671
 672     while (my $line = <$fh>) {
 673         chomp ($line);
 674         next if $line =~m/^#/;
 675         next if ($line =~m/^\s*$/);
 676
 677         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 678             $protocols->{byid}->{$2}->{name} = $1;
 679             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 680         }
 681     }
 682
 683     close($fh);
 684
 685     $etc_protocols = $protocols;
 686
 687     return $etc_protocols;
 688 }
 689
 690 my $ipv4_mask_hash_localnet = {
 691     '255.255.0.0' => 16,
 692     '255.255.128.0' => 17,
 693     '255.255.192.0' => 18,
 694     '255.255.224.0' => 19,
 695     '255.255.240.0' => 20,
 696     '255.255.248.0' => 21,
 697     '255.255.252.0' => 22,
 698     '255.255.254.0' => 23,
 699     '255.255.255.0' => 24,
 700     '255.255.255.128' => 25,
 701     '255.255.255.192' => 26,
 702     '255.255.255.224' => 27,
 703     '255.255.255.240' => 28,
 704     '255.255.255.248' => 29,
 705     '255.255.255.252' => 30,
 706 };
 707
 708 my $__local_network;
 709
 710 sub local_network {
 711     my ($new_value) = @_;
 712
 713     $__local_network = $new_value if defined($new_value);
 714
 715     return $__local_network if defined($__local_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__local_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__local_network;
 740 }
 741
 742 sub parse_address_list {
 743     my ($str) = @_;
 744
 745     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 746     return if $str =~ m/^${ip_alias_pattern}$/;
 747
 748     my $count = 0;
 749     my $iprange = 0;
 750     foreach my $elem (split(/,/, $str)) {
 751         $count++;
 752         if (!Net::IP->new($elem)) {
 753             my $err = Net::IP::Error();
 754             die "invalid IP address: $err\n";
 755         }
 756         $iprange = 1 if $elem =~ m/-/;
 757     }
 758
 759     die "you can use a range in a list\n" if $iprange && $count > 1;
 760 }
 761
 762 sub parse_port_name_number_or_range {
 763     my ($str) = @_;
 764
 765     my $services = PVE::Firewall::get_etc_services();
 766     my $count = 0;
 767     my $icmp_port = 0;
 768
 769     foreach my $item (split(/,/, $str)) {
 770         $count++;
 771         if ($item =~ m/^(\d+):(\d+)$/) {
 772             my ($port1, $port2) = ($1, $2);
 773             die "invalid port '$port1'\n" if $port1 > 65535;
 774             die "invalid port '$port2'\n" if $port2 > 65535;
 775         } elsif ($item =~ m/^(\d+)$/) {
 776             my $port = $1;
 777             die "invalid port '$port'\n" if $port > 65535;
 778         } else {
 779             if ($icmp_type_names->{$item}) {
 780                 $icmp_port = 1;
 781             } else {
 782                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 783             }
 784         }
 785     }
 786
 787     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 788
 789     return $count;
 790 }
 791
 792 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 793 sub pve_fw_verify_port_spec {
 794    my ($portstr) = @_;
 795
 796    parse_port_name_number_or_range($portstr);
 797
 798    return $portstr;
 799 }
 800
 801 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 802 sub pve_fw_verify_v4addr_spec {
 803    my ($list) = @_;
 804
 805    parse_address_list($list);
 806
 807    return $list;
 808 }
 809
 810 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 811 sub pve_fw_verify_protocol_spec {
 812    my ($proto) = @_;
 813
 814    my $protocols = get_etc_protocols();
 815
 816    die "unknown protocol '$proto'\n" if $proto &&
 817        !(defined($protocols->{byname}->{$proto}) ||
 818          defined($protocols->{byid}->{$proto}));
 819
 820    return $proto;
 821 }
 822
 823
 824 # helper function for API
 825
 826 sub copy_opject_with_digest {
 827     my ($object) = @_;
 828
 829     my $sha = Digest::SHA->new('sha1');
 830
 831     my $res = {};
 832     foreach my $k (sort keys %$object) {
 833         my $v = $object->{$k};
 834         next if !defined($v);
 835         $res->{$k} = $v;
 836         $sha->add($k, ':', $v, "\n");
 837     }
 838
 839     my $digest = $sha->hexdigest;
 840
 841     $res->{digest} = $digest;
 842
 843     return wantarray ? ($res, $digest) : $res;
 844 }
 845
 846 sub copy_list_with_digest {
 847     my ($list) = @_;
 848
 849     my $sha = Digest::SHA->new('sha1');
 850
 851     my $res = [];
 852     foreach my $entry (@$list) {
 853         my $data = {};
 854         foreach my $k (sort keys %$entry) {
 855             my $v = $entry->{$k};
 856             next if !defined($v);
 857             $data->{$k} = $v;
 858             # Note: digest ignores refs ($rule->{errors})
 859             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 860         }
 861         push @$res, $data;
 862     }
 863
 864     my $digest = $sha->hexdigest;
 865
 866     foreach my $entry (@$res) {
 867         $entry->{digest} = $digest;
 868     }
 869
 870     return wantarray ? ($res, $digest) : $res;
 871 }
 872
 873 my $rule_properties = {
 874     pos => {
 875         description => "Update rule at position <pos>.",
 876         type => 'integer',
 877         minimum => 0,
 878         optional => 1,
 879     },
 880     digest => get_standard_option('pve-config-digest'),
 881     type => {
 882         type => 'string',
 883         optional => 1,
 884         enum => ['in', 'out', 'group'],
 885     },
 886     action => {
 887         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 888         type => 'string',
 889         optional => 1,
 890         pattern => $security_group_name_pattern,
 891         maxLength => 20,
 892         minLength => 2,
 893     },
 894     macro => {
 895         type => 'string',
 896         optional => 1,
 897         maxLength => 128,
 898     },
 899     iface => get_standard_option('pve-iface', { optional => 1 }),
 900     source => {
 901         type => 'string', format => 'pve-fw-v4addr-spec',
 902         optional => 1,
 903     },
 904     dest => {
 905         type => 'string', format => 'pve-fw-v4addr-spec',
 906         optional => 1,
 907     },
 908     proto => {
 909         type => 'string', format => 'pve-fw-protocol-spec',
 910         optional => 1,
 911     },
 912     enable => {
 913         type => 'boolean',
 914         optional => 1,
 915     },
 916     sport => {
 917         type => 'string', format => 'pve-fw-port-spec',
 918         optional => 1,
 919     },
 920     dport => {
 921         type => 'string', format => 'pve-fw-port-spec',
 922         optional => 1,
 923     },
 924     comment => {
 925         type => 'string',
 926         optional => 1,
 927     },
 928 };
 929
 930 sub add_rule_properties {
 931     my ($properties) = @_;
 932
 933     foreach my $k (keys %$rule_properties) {
 934         my $h = $rule_properties->{$k};
 935         # copy data, so that we can modify later without side effects
 936         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 937     }
 938
 939     return $properties;
 940 }
 941
 942 sub delete_rule_properties {
 943     my ($rule, $delete_str) = @_;
 944
 945     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 946         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 947             if !defined($rule_properties->{$opt});
 948         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 949             if $opt eq 'type' || $opt eq 'action';
 950         delete $rule->{$opt};
 951     }
 952
 953     return $rule;
 954 }
 955
 956 my $apply_macro = sub {
 957     my ($macro_name, $param, $verify) = @_;
 958
 959     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 960     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 961
 962     my $rules = [];
 963
 964     foreach my $templ (@$macro_rules) {
 965         my $rule = {};
 966         my $param_used = {};
 967         foreach my $k (keys %$templ) {
 968             my $v = $templ->{$k};
 969             if ($v eq 'PARAM') {
 970                 $v = $param->{$k};
 971                 $param_used->{$k} = 1;
 972             } elsif ($v eq 'DEST') {
 973                 $v = $param->{dest};
 974                 $param_used->{dest} = 1;
 975             } elsif ($v eq 'SOURCE') {
 976                 $v = $param->{source};
 977                 $param_used->{source} = 1;
 978             }
 979
 980             if (!defined($v)) {
 981                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 982                 raise_param_exc({ macro => $msg }) if $verify;
 983                 die "$msg\n";
 984             }
 985             $rule->{$k} = $v;
 986         }
 987         foreach my $k (keys %$param) {
 988             next if $k eq 'macro';
 989             next if !defined($param->{$k});
 990             next if $param_used->{$k};
 991             if (defined($rule->{$k})) {
 992                 if ($rule->{$k} ne $param->{$k}) {
 993                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 994                     raise_param_exc({ $k => $msg }) if $verify;
 995                     die "$msg\n";
 996                 }
 997             } else {
 998                 $rule->{$k} = $param->{$k};
 999             }
1000         }
1001         push @$rules, $rule;
1002     }
1003
1004     return $rules;
1005 };
1006
1007 sub verify_rule {
1008     my ($rule, $allow_groups, $noerr) = @_;
1009
1010     my $errors = {};
1011     my $error_count = 0;
1012
1013     my $add_error = sub {
1014         my ($param, $msg)  = @_;
1015         chomp $msg;
1016         raise_param_exc({ $param => $msg }) if !$noerr;
1017         $error_count++;
1018         $errors->{$param} = $msg if !$errors->{$param};
1019     };
1020
1021     my $type = $rule->{type};
1022     my $action = $rule->{action};
1023
1024     &$add_error('type', "missing property") if !$type;
1025     &$add_error('action', "missing property") if !$action;
1026
1027     if ($type) {
1028         if ($type eq  'in' || $type eq 'out') {
1029             &$add_error('action', "unknown action '$action'")
1030                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1031         } elsif ($type eq 'group') {
1032             &$add_error('type', "security groups not allowed")
1033                 if !$allow_groups;
1034             &$add_error('action', "invalid characters in security group name")
1035                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1036         } else {
1037             &$add_error('type', "unknown rule type '$type'");
1038         }
1039     }
1040
1041     if ($rule->{iface}) {
1042         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1043         &$add_error('iface', $@) if $@;
1044     }
1045
1046     if ($rule->{macro}) {
1047         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1048             $rule->{macro} = $preferred_name;
1049         } else {
1050             &$add_error('macro', "unknown macro '$rule->{macro}'");
1051         }
1052     }
1053
1054     if ($rule->{proto}) {
1055         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1056         &$add_error('proto', $@) if $@;
1057     }
1058
1059     if ($rule->{dport}) {
1060         eval { parse_port_name_number_or_range($rule->{dport}); };
1061         &$add_error('dport', $@) if $@;
1062         &$add_error('proto', "missing property - 'dport' requires this property")
1063             if !$rule->{proto};
1064     }
1065
1066     if ($rule->{sport}) {
1067         eval { parse_port_name_number_or_range($rule->{sport}); };
1068         &$add_error('sport', $@) if $@;
1069         &$add_error('proto', "missing property - 'sport' requires this property")
1070             if !$rule->{proto};
1071     }
1072
1073     if ($rule->{source}) {
1074         eval { parse_address_list($rule->{source}); };
1075         &$add_error('source', $@) if $@;
1076     }
1077
1078     if ($rule->{dest}) {
1079         eval { parse_address_list($rule->{dest}); };
1080         &$add_error('dest', $@) if $@;
1081     }
1082
1083     if ($rule->{macro}) {
1084         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1085         if (my $err = $@) {
1086             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1087                 my $eh = $err->{errors};
1088                 foreach my $p (keys %$eh) {
1089                     &$add_error($p, $eh->{$p});
1090                 }
1091             } else {
1092                 &$add_error('macro', "$err");
1093             }
1094         }
1095     }
1096
1097     $rule->{errors} = $errors if $error_count;
1098
1099     return $rule;
1100 }
1101
1102 sub copy_rule_data {
1103     my ($rule, $param) = @_;
1104
1105     foreach my $k (keys %$rule_properties) {
1106         if (defined(my $v = $param->{$k})) {
1107             if ($v eq '' || $v eq '-') {
1108                 delete $rule->{$k};
1109             } else {
1110                 $rule->{$k} = $v;
1111             }
1112         }
1113     }
1114
1115     return $rule;
1116 }
1117
1118 # core functions
1119 my $bridge_firewall_enabled = 0;
1120
1121 sub enable_bridge_firewall {
1122
1123     return if $bridge_firewall_enabled; # only once
1124
1125     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1126     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1127
1128     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1129     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1130
1131     $bridge_firewall_enabled = 1;
1132 }
1133
1134 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1135
1136 sub iptables_restore_cmdlist {
1137     my ($cmdlist) = @_;
1138
1139     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1140 }
1141
1142 sub ipset_restore_cmdlist {
1143     my ($cmdlist) = @_;
1144
1145     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1146 }
1147
1148 sub iptables_get_chains {
1149
1150     my $res = {};
1151
1152     # check what chains we want to track
1153     my $is_pvefw_chain = sub {
1154         my $name = shift;
1155
1156         return 1 if $name =~ m/^PVEFW-\S+$/;
1157
1158         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1159
1160         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1161
1162         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1163
1164         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1165         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1166
1167         return undef;
1168     };
1169
1170     my $table = '';
1171
1172     my $hooks = {};
1173
1174     my $parser = sub {
1175         my $line = shift;
1176
1177         return if $line =~ m/^#/;
1178         return if $line =~ m/^\s*$/;
1179
1180         if ($line =~ m/^\*(\S+)$/) {
1181             $table = $1;
1182             return;
1183         }
1184
1185         return if $table ne 'filter';
1186
1187         if ($line =~ m/^:(\S+)\s/) {
1188             my $chain = $1;
1189             return if !&$is_pvefw_chain($chain);
1190             $res->{$chain} = "unknown";
1191         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1192             my ($chain, $sig) = ($1, $2);
1193             return if !&$is_pvefw_chain($chain);
1194             $res->{$chain} = $sig;
1195         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1196             $hooks->{$1} = 1;
1197         } else {
1198             # simply ignore the rest
1199             return;
1200         }
1201     };
1202
1203     run_command("/sbin/iptables-save", outfunc => $parser);
1204
1205     return wantarray ? ($res, $hooks) : $res;
1206 }
1207
1208 sub iptables_chain_digest {
1209     my ($rules) = @_;
1210     my $digest = Digest::SHA->new('sha1');
1211     foreach my $rule (@$rules) { # order is important
1212         $digest->add($rule);
1213     }
1214     return $digest->b64digest;
1215 }
1216
1217 sub ipset_chain_digest {
1218     my ($rules) = @_;
1219
1220     my $digest = Digest::SHA->new('sha1');
1221     foreach my $rule (sort @$rules) { # note: sorted
1222         $digest->add($rule);
1223     }
1224     return $digest->b64digest;
1225 }
1226
1227 sub ipset_get_chains {
1228
1229     my $res = {};
1230     my $chains = {};
1231
1232     my $parser = sub {
1233         my $line = shift;
1234
1235         return if $line =~ m/^#/;
1236         return if $line =~ m/^\s*$/;
1237         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1238             my $chain = $1;
1239             $line =~ s/\s+$//; # delete trailing white space
1240             push @{$chains->{$chain}}, $line;
1241         } else {
1242             # simply ignore the rest
1243             return;
1244         }
1245     };
1246
1247     run_command("/usr/sbin/ipset save", outfunc => $parser);
1248
1249     # compute digest for each chain
1250     foreach my $chain (keys %$chains) {
1251         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1252     }
1253
1254     return $res;
1255 }
1256
1257 sub ruleset_generate_cmdstr {
1258     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1259
1260     return if defined($rule->{enable}) && !$rule->{enable};
1261     return if $rule->{errors};
1262
1263     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1264
1265     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1266     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1267
1268     my @cmd = ();
1269
1270     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1271     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1272
1273     my $source = $rule->{source};
1274     my $dest = $rule->{dest};
1275
1276     if ($source) {
1277         if ($source =~ m/^\+/) {
1278             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1279                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1280                 push @cmd, "-m set --match-set PVEFW-$1 src";
1281             } else {
1282                 die "invalid security group name '$source'\n";
1283             }
1284         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1285             my $alias = lc($source);
1286             my $e = $cluster_conf->{aliases}->{$alias};
1287             die "no such alias $source\n" if !$e;
1288             push @cmd, "-s $e->{cidr}";
1289         } elsif ($source =~ m/\-/){
1290             push @cmd, "-m iprange --src-range $source";
1291
1292         } else {
1293             push @cmd, "-s $source";
1294         }
1295     }
1296
1297     if ($dest) {
1298         if ($dest =~ m/^\+/) {
1299             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1300                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1301                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1302             } else {
1303                 die "invalid security group name '$dest'\n";
1304             }
1305         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1306             my $alias = lc($dest);
1307             my $e = $cluster_conf->{aliases}->{$alias};
1308             die "no such alias $dest" if !$e;
1309             push @cmd, "-d $e->{cidr}";
1310         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1311             push @cmd, "-m iprange --dst-range $dest";
1312
1313         } else {
1314             push @cmd, "-d $dest";
1315         }
1316     }
1317
1318     if ($rule->{proto}) {
1319         push @cmd, "-p $rule->{proto}";
1320
1321         my $multiport = 0;
1322         $multiport++ if $nbdport > 1;
1323         $multiport++ if $nbsport > 1;
1324
1325         push @cmd, "--match multiport" if $multiport;
1326
1327         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1328             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1329
1330         if ($rule->{dport}) {
1331             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1332                 # Note: we use dport to store --icmp-type
1333                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1334                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1335             } else {
1336                 if ($nbdport > 1) {
1337                     if ($multiport == 2) {
1338                         push @cmd,  "--ports $rule->{dport}";
1339                     } else {
1340                         push @cmd, "--dports $rule->{dport}";
1341                     }
1342                 } else {
1343                     push @cmd, "--dport $rule->{dport}";
1344                 }
1345             }
1346         }
1347
1348         if ($rule->{sport}) {
1349             if ($nbsport > 1) {
1350                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1351             } else {
1352                 push @cmd, "--sport $rule->{sport}";
1353             }
1354         }
1355     } elsif ($rule->{dport} || $rule->{sport}) {
1356         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1357         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1358     }
1359
1360     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1361
1362     if (my $action = $rule->{action}) {
1363         $action = $actions->{$action} if defined($actions->{$action});
1364         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1365         push @cmd, $goto ? "-g $action" : "-j $action";
1366     }
1367
1368     return scalar(@cmd) ? join(' ', @cmd) : undef;
1369 }
1370
1371 sub ruleset_generate_rule {
1372     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1373
1374     my $rules;
1375
1376     if ($rule->{macro}) {
1377         $rules = &$apply_macro($rule->{macro}, $rule);
1378     } else {
1379         $rules = [ $rule ];
1380     }
1381
1382     # update all or nothing
1383
1384     my @cmds = ();
1385     foreach my $tmp (@$rules) {
1386         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1387             push @cmds, $cmdstr;
1388         }
1389     }
1390
1391     foreach my $cmdstr (@cmds) {
1392         ruleset_addrule($ruleset, $chain, $cmdstr);
1393     }
1394 }
1395
1396 sub ruleset_generate_rule_insert {
1397     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1398
1399     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1400
1401     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1402         ruleset_insertrule($ruleset, $chain, $cmdstr);
1403     }
1404 }
1405
1406 sub ruleset_create_chain {
1407     my ($ruleset, $chain) = @_;
1408
1409     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1410     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1411
1412     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1413
1414     $ruleset->{$chain} = [];
1415 }
1416
1417 sub ruleset_chain_exist {
1418     my ($ruleset, $chain) = @_;
1419
1420     return $ruleset->{$chain} ? 1 : undef;
1421 }
1422
1423 sub ruleset_addrule {
1424    my ($ruleset, $chain, $rule) = @_;
1425
1426    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1427
1428    push @{$ruleset->{$chain}}, "-A $chain $rule";
1429 }
1430
1431 sub ruleset_insertrule {
1432    my ($ruleset, $chain, $rule) = @_;
1433
1434    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1435
1436    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1437 }
1438
1439 sub get_log_rule_base {
1440     my ($chain, $vmid, $msg, $loglevel) = @_;
1441
1442     die "internal error - no log level" if !defined($loglevel);
1443
1444     $vmid = 0 if !defined($vmid);
1445
1446     # Note: we use special format for prefix to pass further
1447     # info to log daemon (VMID, LOGVELEL and CHAIN)
1448
1449     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1450 }
1451
1452 sub ruleset_addlog {
1453     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1454
1455     return if !defined($loglevel);
1456
1457     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1458
1459     $logrule = "$rule $logrule" if defined($rule);
1460
1461     ruleset_addrule($ruleset, $chain, $logrule);
1462 }
1463
1464 sub ruleset_add_chain_policy {
1465     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1466
1467     if ($policy eq 'ACCEPT') {
1468
1469         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1470                               { ACCEPT =>  $accept_action});
1471
1472     } elsif ($policy eq 'DROP') {
1473
1474         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1475
1476         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1477
1478         ruleset_addrule($ruleset, $chain, "-j DROP");
1479     } elsif ($policy eq 'REJECT') {
1480         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1481
1482         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1483
1484         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1485     } else {
1486         # should not happen
1487         die "internal error: unknown policy '$policy'";
1488     }
1489 }
1490
1491 sub ruleset_chain_add_conn_filters {
1492     my ($ruleset, $chain, $accept) = @_;
1493
1494     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1495     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1496 }
1497
1498 sub ruleset_chain_add_input_filters {
1499     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1500
1501     if ($cluster_conf->{ipset}->{blacklist}){
1502         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1503         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1504     }
1505
1506     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1507         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1508     }
1509
1510     if ($options->{tcpflags}) {
1511         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1512     }
1513 }
1514
1515 sub ruleset_create_vm_chain {
1516     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1517
1518     ruleset_create_chain($ruleset, $chain);
1519     my $accept = generate_nfqueue($options);
1520
1521     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1522         if ($direction eq 'OUT') {
1523             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1524                                                       proto => 'udp', sport => 68, dport => 67 });
1525         } else {
1526             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1527                                                       proto => 'udp', sport => 67, dport => 68 });
1528         }
1529     }
1530
1531     if ($direction eq 'OUT') {
1532         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1533             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1534         }
1535         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1536     }
1537 }
1538
1539 sub ruleset_add_group_rule {
1540     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1541
1542     my $group = $rule->{action};
1543     my $group_chain = "GROUP-$group-$direction";
1544     if(!ruleset_chain_exist($ruleset, $group_chain)){
1545         generate_group_rules($ruleset, $cluster_conf, $group);
1546     }
1547
1548     if ($direction eq 'OUT' && $rule->{iface_out}) {
1549         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1550     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1551         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1552     } else {
1553         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1554     }
1555
1556     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1557 }
1558
1559 sub ruleset_generate_vm_rules {
1560     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1561
1562     my $lc_direction = lc($direction);
1563
1564     my $in_accept = generate_nfqueue($options);
1565
1566     foreach my $rule (@$rules) {
1567         next if $rule->{iface} && $rule->{iface} ne $netid;
1568         next if !$rule->{enable};
1569         if ($rule->{type} eq 'group') {
1570             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1571                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1572         } else {
1573             next if $rule->{type} ne $lc_direction;
1574             eval {
1575                 if ($direction eq 'OUT') {
1576                     ruleset_generate_rule($ruleset, $chain, $rule,
1577                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1578                                           undef, $cluster_conf);
1579                 } else {
1580                     ruleset_generate_rule($ruleset, $chain, $rule,
1581                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1582                                           undef, $cluster_conf);
1583                 }
1584             };
1585             warn $@ if $@;
1586         }
1587     }
1588 }
1589
1590 sub generate_nfqueue {
1591     my ($options) = @_;
1592
1593     if ($options->{ips}) {
1594         my $action = "NFQUEUE";
1595         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1596             if (defined($3) && defined($1)) {
1597                 $action .= " --queue-balance $1:$3";
1598             } elsif (defined($1)) {
1599                 $action .= " --queue-num $1";
1600             }
1601         }
1602         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1603         return $action;
1604     } else {
1605         return "ACCEPT";
1606     }
1607 }
1608
1609 sub ruleset_generate_vm_ipsrules {
1610     my ($ruleset, $options, $direction, $iface) = @_;
1611
1612     if ($options->{ips} && $direction eq 'IN') {
1613         my $nfqueue = generate_nfqueue($options);
1614
1615         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1616             ruleset_create_chain($ruleset, "PVEFW-IPS");
1617         }
1618
1619         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1620     }
1621 }
1622
1623 sub generate_venet_rules_direction {
1624     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1625
1626     my $lc_direction = lc($direction);
1627
1628     my $rules = $vmfw_conf->{rules};
1629
1630     my $options = $vmfw_conf->{options};
1631     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1632
1633     my $chain = "venet0-$vmid-$direction";
1634
1635     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1636
1637     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1638
1639     # implement policy
1640     my $policy;
1641
1642     if ($direction eq 'OUT') {
1643         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1644     } else {
1645         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1646     }
1647
1648     my $accept = generate_nfqueue($options);
1649     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1650     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1651
1652     if ($direction eq 'OUT') {
1653         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1654             action => $chain,
1655             source => $ip,
1656             iface_in => 'venet0'});
1657     } else {
1658         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1659             action => $chain,
1660             dest => $ip,
1661             iface_out => 'venet0'});
1662     }
1663 }
1664
1665 sub generate_tap_rules_direction {
1666     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1667
1668     my $lc_direction = lc($direction);
1669
1670     my $rules = $vmfw_conf->{rules};
1671
1672     my $options = $vmfw_conf->{options};
1673     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1674
1675     my $tapchain = "$iface-$direction";
1676
1677     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1678
1679     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1680
1681     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1682
1683     # implement policy
1684     my $policy;
1685
1686     if ($direction eq 'OUT') {
1687         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1688     } else {
1689         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1690     }
1691
1692     my $accept = generate_nfqueue($options);
1693     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1694     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1695
1696     # plug the tap chain to bridge chain
1697     if ($direction eq 'IN') {
1698         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1699                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1700     } else {
1701         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1702                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1703     }
1704 }
1705
1706 sub enable_host_firewall {
1707     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1708
1709     my $options = $hostfw_conf->{options};
1710     my $cluster_options = $cluster_conf->{options};
1711     my $rules = $hostfw_conf->{rules};
1712     my $cluster_rules = $cluster_conf->{rules};
1713
1714     # host inbound firewall
1715     my $chain = "PVEFW-HOST-IN";
1716     ruleset_create_chain($ruleset, $chain);
1717
1718     my $loglevel = get_option_log_level($options, "log_level_in");
1719
1720     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1721
1722     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1723     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1724
1725     # we use RETURN because we need to check also tap rules
1726     my $accept_action = 'RETURN';
1727
1728     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1729
1730     # add host rules first, so that cluster wide rules can be overwritten
1731     foreach my $rule (@$rules, @$cluster_rules) {
1732         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1733         eval {
1734             if ($rule->{type} eq 'group') {
1735                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1736             } elsif ($rule->{type} eq 'in') {
1737                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1738                                       undef, $cluster_conf);
1739             }
1740         };
1741         warn $@ if $@;
1742         delete $rule->{iface_in};
1743     }
1744
1745     # allow standard traffic for management ipset (includes cluster network)
1746     my $mngmntsrc = "-m set --match-set PVEFW-management src";
1747     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1748     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1749     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1750     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1751
1752     my $localnet = local_network();
1753
1754     # corosync
1755     if ($localnet) {
1756         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1757         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1758         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1759     }
1760
1761     # implement input policy
1762     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1763     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1764
1765     # host outbound firewall
1766     $chain = "PVEFW-HOST-OUT";
1767     ruleset_create_chain($ruleset, $chain);
1768
1769     $loglevel = get_option_log_level($options, "log_level_out");
1770
1771     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1772
1773     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1774
1775     # we use RETURN because we may want to check other thigs later
1776     $accept_action = 'RETURN';
1777
1778     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1779
1780     # add host rules first, so that cluster wide rules can be overwritten
1781     foreach my $rule (@$rules, @$cluster_rules) {
1782         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1783         eval {
1784             if ($rule->{type} eq 'group') {
1785                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1786             } elsif ($rule->{type} eq 'out') {
1787                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1788                                       undef, $cluster_conf);
1789             }
1790         };
1791         warn $@ if $@;
1792         delete $rule->{iface_out};
1793     }
1794
1795     # allow standard traffic on cluster network
1796     if ($localnet) {
1797         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1798         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1799         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1800         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1801
1802         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1803         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1804         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1805     }
1806
1807     # implement output policy
1808     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1809     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1810
1811     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1812     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1813 }
1814
1815 sub generate_group_rules {
1816     my ($ruleset, $cluster_conf, $group) = @_;
1817
1818     my $rules = $cluster_conf->{groups}->{$group};
1819
1820     if (!$rules) {
1821         warn "no such security group '$group'\n";
1822         $rules = []; # create empty chain
1823     }
1824
1825     my $chain = "GROUP-${group}-IN";
1826
1827     ruleset_create_chain($ruleset, $chain);
1828     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1829
1830     foreach my $rule (@$rules) {
1831         next if $rule->{type} ne 'in';
1832         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1833     }
1834
1835     $chain = "GROUP-${group}-OUT";
1836
1837     ruleset_create_chain($ruleset, $chain);
1838     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1839
1840     foreach my $rule (@$rules) {
1841         next if $rule->{type} ne 'out';
1842         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1843         # check also other tap rules later
1844         ruleset_generate_rule($ruleset, $chain, $rule,
1845                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1846     }
1847 }
1848
1849 my $MAX_NETS = 32;
1850 my $valid_netdev_names = {};
1851 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1852     $valid_netdev_names->{"net$i"} = 1;
1853 }
1854
1855 sub parse_fw_rule {
1856     my ($prefix, $line, $allow_iface, $allow_groups, $verbose) = @_;
1857
1858     chomp $line;
1859
1860     my $orig_line = $line;
1861
1862     my $rule = {};
1863
1864     # we can add single line comments to the end of the rule
1865     if ($line =~ s/#\s*(.*?)\s*$//) {
1866         $rule->{comment} = decode('utf8', $1);
1867     }
1868
1869     # we can disable a rule when prefixed with '|'
1870
1871     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
1872
1873     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1874         die "unable to parse rule: $line\n";
1875
1876     $rule->{type} = lc($1);
1877     $rule->{action} = $2;
1878
1879     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1880         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1881             $rule->{macro} = $1;
1882             $rule->{action} = $2;
1883         }
1884     }
1885
1886     while (length($line)) {
1887         if ($line =~ s/^-i (\S+)\s*//) {
1888             die "parameter -i not allowed\n" if !$allow_iface;
1889             $rule->{iface} = $1;
1890             next;
1891         }
1892
1893         last if $rule->{type} eq 'group';
1894
1895         if ($line =~ s/^-p (\S+)\s*//) {
1896             $rule->{proto} = $1;
1897             next;
1898         }
1899
1900         if ($line =~ s/^-dport (\S+)\s*//) {
1901             $rule->{dport} = $1;
1902             next;
1903         }
1904
1905         if ($line =~ s/^-sport (\S+)\s*//) {
1906             $rule->{sport} = $1;
1907             next;
1908         }
1909         if ($line =~ s/^-source (\S+)\s*//) {
1910             $rule->{source} = $1;
1911             next;
1912         }
1913         if ($line =~ s/^-dest (\S+)\s*//) {
1914             $rule->{dest} = $1;
1915             next;
1916         }
1917
1918         last;
1919     }
1920
1921     die "unable to parse rule parameters: $line\n" if length($line);
1922
1923     $rule = verify_rule($rule, $allow_groups, 1);
1924     if ($verbose && $rule->{errors}) {
1925         warn "$prefix - errors in rule parameters: $orig_line\n";
1926         foreach my $p (keys %{$rule->{errors}}) {
1927             warn "  $p: $rule->{errors}->{$p}\n";
1928         }
1929     }
1930
1931     return $rule;
1932 }
1933
1934 sub parse_vmfw_option {
1935     my ($line) = @_;
1936
1937     my ($opt, $value);
1938
1939     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1940
1941     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1942         $opt = lc($1);
1943         $value = int($2);
1944     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1945         $opt = lc($1);
1946         $value = $2 ? lc($3) : '';
1947     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1948         $opt = lc($1);
1949         $value = uc($3);
1950     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1951         $opt = lc($1);
1952         $value = $2;
1953     } else {
1954         chomp $line;
1955         die "can't parse option '$line'\n"
1956     }
1957
1958     return ($opt, $value);
1959 }
1960
1961 sub parse_hostfw_option {
1962     my ($line) = @_;
1963
1964     my ($opt, $value);
1965
1966     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1967
1968     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1969         $opt = lc($1);
1970         $value = int($2);
1971     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1972         $opt = lc($1);
1973         $value = $2 ? lc($3) : '';
1974     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1975         $opt = lc($1);
1976         $value = int($2);
1977     } else {
1978         chomp $line;
1979         die "can't parse option '$line'\n"
1980     }
1981
1982     return ($opt, $value);
1983 }
1984
1985 sub parse_clusterfw_option {
1986     my ($line) = @_;
1987
1988     my ($opt, $value);
1989
1990     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1991         $opt = lc($1);
1992         $value = int($2);
1993     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1994         $opt = lc($1);
1995         $value = uc($3);
1996     } else {
1997         chomp $line;
1998         die "can't parse option '$line'\n"
1999     }
2000
2001     return ($opt, $value);
2002 }
2003
2004 sub parse_alias {
2005     my ($line) = @_;
2006
2007     # we can add single line comments to the end of the line
2008     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2009
2010     if ($line =~ m/^(\S+)\s(\S+)$/) {
2011         my ($name, $cidr) = ($1, $2);
2012         $cidr =~ s|/32$||;
2013         pve_verify_ipv4_or_cidr($cidr);
2014         my $data = {
2015             name => $name,
2016             cidr => $cidr,
2017         };
2018         $data->{comment} = $comment  if $comment;
2019         return $data;
2020     }
2021
2022     return undef;
2023 }
2024
2025 sub parse_vm_fw_rules {
2026     my ($filename, $fh, $verbose) = @_;
2027
2028     my $res = {
2029         rules => [],
2030         options => {},
2031         aliases => {},
2032     };
2033
2034     my $section;
2035
2036     while (defined(my $line = <$fh>)) {
2037         next if $line =~ m/^#/;
2038         next if $line =~ m/^\s*$/;
2039
2040         my $linenr = $fh->input_line_number();
2041         my $prefix = "$filename (line $linenr)";
2042
2043         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2044             $section = lc($1);
2045             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2046             next;
2047         }
2048         if (!$section) {
2049             warn "$prefix: skip line - no section";
2050             next;
2051         }
2052
2053         next if !$res->{$section}; # skip undefined section
2054
2055         if ($section eq 'options') {
2056             eval {
2057                 my ($opt, $value) = parse_vmfw_option($line);
2058                 $res->{options}->{$opt} = $value;
2059             };
2060             warn "$prefix: $@" if $@;
2061             next;
2062         }
2063
2064         if ($section eq 'aliases') {
2065             eval {
2066                 my $data = parse_alias($line);
2067                 $res->{aliases}->{lc($data->{name})} = $data;
2068             };
2069             warn "$prefix: $@" if $@;
2070             next;
2071         }
2072
2073         my $rule;
2074         eval { $rule = parse_fw_rule($prefix, $line, 1, 1, $verbose); };
2075         if (my $err = $@) {
2076             warn "$prefix: $err";
2077             next;
2078         }
2079
2080         push @{$res->{$section}}, $rule;
2081     }
2082
2083     return $res;
2084 }
2085
2086 sub parse_host_fw_rules {
2087     my ($filename, $fh, $verbose) = @_;
2088
2089     my $res = { rules => [], options => {}};
2090
2091     my $section;
2092
2093     while (defined(my $line = <$fh>)) {
2094         next if $line =~ m/^#/;
2095         next if $line =~ m/^\s*$/;
2096
2097         my $linenr = $fh->input_line_number();
2098         my $prefix = "$filename (line $linenr)";
2099
2100         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2101             $section = lc($1);
2102             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2103             next;
2104         }
2105         if (!$section) {
2106             warn "$prefix: skip line - no section";
2107             next;
2108         }
2109
2110         next if !$res->{$section}; # skip undefined section
2111
2112         if ($section eq 'options') {
2113             eval {
2114                 my ($opt, $value) = parse_hostfw_option($line);
2115                 $res->{options}->{$opt} = $value;
2116             };
2117             warn "$prefix: $@" if $@;
2118             next;
2119         }
2120
2121         my $rule;
2122         eval { $rule = parse_fw_rule($prefix, $line, 1, 1, $verbose); };
2123         if (my $err = $@) {
2124             warn "$prefix: $err";
2125             next;
2126         }
2127
2128         push @{$res->{$section}}, $rule;
2129     }
2130
2131     return $res;
2132 }
2133
2134 sub parse_cluster_fw_rules {
2135     my ($filename, $fh, $verbose) = @_;
2136
2137     my $section;
2138     my $group;
2139
2140     my $res = {
2141         rules => [],
2142         options => {},
2143         aliases => {},
2144         groups => {},
2145         group_comments => {},
2146         ipset => {} ,
2147         ipset_comments => {},
2148     };
2149
2150     while (defined(my $line = <$fh>)) {
2151         next if $line =~ m/^#/;
2152         next if $line =~ m/^\s*$/;
2153
2154         my $linenr = $fh->input_line_number();
2155         my $prefix = "$filename (line $linenr)";
2156
2157         if ($line =~ m/^\[options\]$/i) {
2158             $section = 'options';
2159             next;
2160         }
2161
2162         if ($line =~ m/^\[aliases\]$/i) {
2163             $section = 'aliases';
2164             next;
2165         }
2166
2167         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2168             $section = 'groups';
2169             $group = lc($1);
2170             my $comment = $2;
2171             $res->{$section}->{$group} = [];
2172             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2173                 if $comment;
2174             next;
2175         }
2176
2177         if ($line =~ m/^\[rules\]$/i) {
2178             $section = 'rules';
2179             next;
2180         }
2181
2182         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2183             $section = 'ipset';
2184             $group = lc($1);
2185             my $comment = $2;
2186             $res->{$section}->{$group} = [];
2187             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2188                 if $comment;
2189             next;
2190         }
2191
2192         if (!$section) {
2193             warn "$prefix: skip line - no section\n";
2194             next;
2195         }
2196
2197         if ($section eq 'options') {
2198             eval {
2199                 my ($opt, $value) = parse_clusterfw_option($line);
2200                 $res->{options}->{$opt} = $value;
2201             };
2202             warn "$prefix: $@" if $@;
2203         } elsif ($section eq 'aliases') {
2204             eval {
2205                 my $data = parse_alias($line);
2206                 $res->{aliases}->{lc($data->{name})} = $data;
2207             };
2208             warn "$prefix: $@" if $@;
2209         } elsif ($section eq 'rules') {
2210             my $rule;
2211             eval { $rule = parse_fw_rule($prefix, $line, 1, 1, $verbose); };
2212             if (my $err = $@) {
2213                 warn "$prefix: $err";
2214                 next;
2215             }
2216             push @{$res->{$section}}, $rule;
2217         } elsif ($section eq 'groups') {
2218             my $rule;
2219             eval { $rule = parse_fw_rule($prefix, $line, 0, 0, $verbose); };
2220             if (my $err = $@) {
2221                 warn "$prefix: $err";
2222                 next;
2223             }
2224             push @{$res->{$section}->{$group}}, $rule;
2225         } elsif ($section eq 'ipset') {
2226             # we can add single line comments to the end of the rule
2227             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2228
2229             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2230             my $nomatch = $1;
2231             my $cidr = $2;
2232
2233             if($cidr !~ m/^${ip_alias_pattern}$/) {
2234                 $cidr =~ s|/32$||;
2235
2236                 eval { pve_verify_ipv4_or_cidr($cidr); };
2237                 if (my $err = $@) {
2238                     warn "$prefix: $cidr - $err";
2239                     next;
2240                 }
2241             }
2242
2243             my $entry = { cidr => $cidr };
2244             $entry->{nomatch} = 1 if $nomatch;
2245             $entry->{comment} = $comment if $comment;
2246
2247             push @{$res->{$section}->{$group}}, $entry;
2248         }
2249     }
2250
2251     return $res;
2252 }
2253
2254 sub run_locked {
2255     my ($code, @param) = @_;
2256
2257     my $timeout = 10;
2258
2259     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2260
2261     die $@ if $@;
2262
2263     return $res;
2264 }
2265
2266 sub read_local_vm_config {
2267
2268     my $openvz = {};
2269     my $qemu = {};
2270
2271     my $vmdata = { openvz => $openvz, qemu => $qemu };
2272
2273     my $vmlist = PVE::Cluster::get_vmlist();
2274     return $vmdata if !$vmlist || !$vmlist->{ids};
2275     my $ids = $vmlist->{ids};
2276
2277     foreach my $vmid (keys %$ids) {
2278         next if !$vmid; # skip VE0
2279         my $d = $ids->{$vmid};
2280         next if !$d->{node} || $d->{node} ne $nodename;
2281         next if !$d->{type};
2282         if ($d->{type} eq 'openvz') {
2283             if ($have_pve_manager) {
2284                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2285                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2286                     $openvz->{$vmid} = $conf;
2287                 }
2288             }
2289         } elsif ($d->{type} eq 'qemu') {
2290             if ($have_qemu_server) {
2291                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2292                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2293                     $qemu->{$vmid} = $conf;
2294                 }
2295             }
2296         }
2297     }
2298
2299     return $vmdata;
2300 };
2301
2302 sub load_vmfw_conf {
2303     my ($vmid, $dir, $verbose) = @_;
2304
2305     my $vmfw_conf = {};
2306
2307     $dir = "/etc/pve/firewall" if !defined($dir);
2308
2309     my $filename = "$dir/$vmid.fw";
2310     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2311         $vmfw_conf = parse_vm_fw_rules($filename, $fh, $verbose);
2312     }
2313
2314     return $vmfw_conf;
2315 }
2316
2317 my $format_rules = sub {
2318     my ($rules, $allow_iface) = @_;
2319
2320     my $raw = '';
2321
2322     foreach my $rule (@$rules) {
2323         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2324             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2325             $raw .= uc($rule->{type});
2326             if ($rule->{macro}) {
2327                 $raw .= " $rule->{macro}($rule->{action})";
2328             } else {
2329                 $raw .= " " . $rule->{action};
2330             }
2331             if ($allow_iface && $rule->{iface}) {
2332                 $raw .= " -i $rule->{iface}";
2333             }
2334
2335             if ($rule->{type} ne  'group')  {
2336                 $raw .= " -source $rule->{source}" if $rule->{source};
2337                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2338                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2339                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2340                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2341             }
2342
2343             $raw .= " # " . encode('utf8', $rule->{comment})
2344                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2345             $raw .= "\n";
2346         } else {
2347             die "unknown rule type '$rule->{type}'";
2348         }
2349     }
2350
2351     return $raw;
2352 };
2353
2354 my $format_options = sub {
2355     my ($options) = @_;
2356
2357     my $raw = '';
2358
2359     $raw .= "[OPTIONS]\n\n";
2360     foreach my $opt (keys %$options) {
2361         $raw .= "$opt: $options->{$opt}\n";
2362     }
2363     $raw .= "\n";
2364
2365     return $raw;
2366 };
2367
2368 my $format_aliases = sub {
2369     my ($aliases) = @_;
2370
2371     my $raw = '';
2372
2373     $raw .= "[ALIASES]\n\n";
2374     foreach my $k (keys %$aliases) {
2375         my $e = $aliases->{$k};
2376         $raw .= "$e->{name} $e->{cidr}";
2377         $raw .= " # " . encode('utf8', $e->{comment})
2378             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2379         $raw .= "\n";
2380     }
2381     $raw .= "\n";
2382
2383     return $raw;
2384 };
2385
2386 my $format_ipset = sub {
2387     my ($options) = @_;
2388
2389     my $raw = '';
2390
2391     my $nethash = {};
2392     foreach my $entry (@$options) {
2393         $nethash->{$entry->{cidr}} = $entry;
2394     }
2395
2396     foreach my $cidr (sort keys %$nethash) {
2397         my $entry = $nethash->{$cidr};
2398         my $line = $entry->{nomatch} ? '!' : '';
2399         $line .= $entry->{cidr};
2400         $line .= " # " . encode('utf8', $entry->{comment})
2401             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2402         $raw .= "$line\n";
2403     }
2404
2405     return $raw;
2406 };
2407
2408 sub save_vmfw_conf {
2409     my ($vmid, $vmfw_conf) = @_;
2410
2411     my $raw = '';
2412
2413     my $options = $vmfw_conf->{options};
2414     $raw .= &$format_options($options) if scalar(keys %$options);
2415
2416     my $aliases = $vmfw_conf->{aliases};
2417     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2418
2419     my $rules = $vmfw_conf->{rules} || [];
2420     if (scalar(@$rules)) {
2421         $raw .= "[RULES]\n\n";
2422         $raw .= &$format_rules($rules, 1);
2423         $raw .= "\n";
2424     }
2425
2426     my $filename = "/etc/pve/firewall/$vmid.fw";
2427     PVE::Tools::file_set_contents($filename, $raw);
2428 }
2429
2430 sub read_vm_firewall_configs {
2431     my ($vmdata, $dir, $verbose) = @_;
2432
2433     my $vmfw_configs = {};
2434
2435     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2436         my $vmfw_conf = load_vmfw_conf($vmid, $dir, $verbose);
2437         next if !$vmfw_conf->{options}; # skip if file does not exists
2438         $vmfw_configs->{$vmid} = $vmfw_conf;
2439     }
2440
2441     return $vmfw_configs;
2442 }
2443
2444 sub get_option_log_level {
2445     my ($options, $k) = @_;
2446
2447     my $v = $options->{$k};
2448     $v = $default_log_level if !defined($v);
2449
2450     return undef if $v eq '' || $v eq 'nolog';
2451
2452     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2453
2454     return $v if ($v >= 0) && ($v <= 7);
2455
2456     warn "unknown log level ($k = '$v')\n";
2457
2458     return undef;
2459 }
2460
2461 sub generate_std_chains {
2462     my ($ruleset, $options) = @_;
2463
2464     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2465
2466     # same as shorewall smurflog.
2467     my $chain = 'PVEFW-smurflog';
2468     $pve_std_chains->{$chain} = [];
2469
2470     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2471     push @{$pve_std_chains->{$chain}}, "-j DROP";
2472
2473     # same as shorewall logflags action.
2474     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2475     $chain = 'PVEFW-logflags';
2476     $pve_std_chains->{$chain} = [];
2477
2478     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2479     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2480     push @{$pve_std_chains->{$chain}}, "-j DROP";
2481
2482     foreach my $chain (keys %$pve_std_chains) {
2483         ruleset_create_chain($ruleset, $chain);
2484         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2485             if (ref($rule)) {
2486                 ruleset_generate_rule($ruleset, $chain, $rule);
2487             } else {
2488                 ruleset_addrule($ruleset, $chain, $rule);
2489             }
2490         }
2491     }
2492 }
2493
2494 sub generate_ipset_chains {
2495     my ($ipset_ruleset, $fw_conf) = @_;
2496
2497     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2498         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2499     }
2500 }
2501
2502 sub generate_ipset {
2503     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2504
2505     my $hashsize = scalar(@$options);
2506     if ($hashsize <= 64) {
2507         $hashsize = 64;
2508     } else {
2509         $hashsize = round_powerof2($hashsize);
2510     }
2511
2512     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2513
2514     # remove duplicates
2515     my $nethash = {};
2516     foreach my $entry (@$options) {
2517         my $cidr = $entry->{cidr};
2518         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2519             my $alias = lc($cidr);
2520             if ($aliases->{$alias}) {
2521                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2522                 $nethash->{$entry->{cidr}} = $entry;
2523             } else {
2524                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2525             }
2526         } else {
2527             $nethash->{$entry->{cidr}} = $entry;
2528         }
2529     }
2530
2531     foreach my $cidr (sort keys %$nethash) {
2532         my $entry = $nethash->{$cidr};
2533
2534         my $cmd = "add $name $cidr";
2535         if ($entry->{nomatch}) {
2536             if ($feature_ipset_nomatch) {
2537                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2538             } else {
2539                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2540             }
2541         } else {
2542             push @{$ipset_ruleset->{$name}}, $cmd;
2543         }
2544     }
2545 }
2546
2547 sub round_powerof2 {
2548     my ($int) = @_;
2549
2550     $int--;
2551     $int |= $int >> $_ foreach (1,2,4,8,16);
2552     return ++$int;
2553 }
2554
2555 sub load_clusterfw_conf {
2556     my ($filename, $verbose) = @_;
2557
2558     $filename = $clusterfw_conf_filename if !defined($filename);
2559
2560     my $cluster_conf = {};
2561     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2562         $cluster_conf = parse_cluster_fw_rules($filename, $fh, $verbose);
2563     }
2564
2565     return $cluster_conf;
2566 }
2567
2568 sub save_clusterfw_conf {
2569     my ($cluster_conf) = @_;
2570
2571     my $raw = '';
2572
2573     my $options = $cluster_conf->{options};
2574     $raw .= &$format_options($options) if scalar(keys %$options);
2575
2576     my $aliases = $cluster_conf->{aliases};
2577     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2578
2579     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2580         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2581             my $utf8comment = encode('utf8', $comment);
2582             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2583         } else {
2584             $raw .= "[IPSET $ipset]\n\n";
2585         }
2586         my $options = $cluster_conf->{ipset}->{$ipset};
2587         $raw .= &$format_ipset($options);
2588         $raw .= "\n";
2589     }
2590
2591     my $rules = $cluster_conf->{rules};
2592     if (scalar(@$rules)) {
2593         $raw .= "[RULES]\n\n";
2594         $raw .= &$format_rules($rules, 1);
2595         $raw .= "\n";
2596     }
2597
2598     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2599         my $rules = $cluster_conf->{groups}->{$group};
2600         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2601             my $utf8comment = encode('utf8', $comment);
2602             $raw .= "[group $group] # $utf8comment\n\n";
2603         } else {
2604             $raw .= "[group $group]\n\n";
2605         }
2606
2607         $raw .= &$format_rules($rules, 0);
2608         $raw .= "\n";
2609     }
2610
2611     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2612 }
2613
2614 sub load_hostfw_conf {
2615     my ($filename, $verbose) = @_;
2616
2617     $filename = $hostfw_conf_filename if !defined($filename);
2618
2619     my $hostfw_conf = {};
2620     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2621         $hostfw_conf = parse_host_fw_rules($filename, $fh, $verbose);
2622     }
2623     return $hostfw_conf;
2624 }
2625
2626 sub save_hostfw_conf {
2627     my ($hostfw_conf) = @_;
2628
2629     my $raw = '';
2630
2631     my $options = $hostfw_conf->{options};
2632     $raw .= &$format_options($options) if scalar(keys %$options);
2633
2634     my $rules = $hostfw_conf->{rules};
2635     if (scalar(@$rules)) {
2636         $raw .= "[RULES]\n\n";
2637         $raw .= &$format_rules($rules, 1);
2638         $raw .= "\n";
2639     }
2640
2641     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2642 }
2643
2644 sub compile {
2645     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2646
2647     my $vmfw_configs;
2648
2649     if ($vmdata) { # test mode
2650         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2651         my $filename = "$testdir/cluster.fw";
2652         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2653
2654         $filename = "$testdir/host.fw";
2655         $hostfw_conf = load_hostfw_conf($filename, $verbose);
2656
2657         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir, $verbose);
2658     } else { # normal operation
2659         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2660
2661         $hostfw_conf = load_hostfw_conf(undef, $verbose) if !$hostfw_conf;
2662
2663         $vmdata = read_local_vm_config();
2664         $vmfw_configs = read_vm_firewall_configs($vmdata, undef, $verbose);
2665     }
2666
2667
2668     $cluster_conf->{ipset}->{venet0} = [];
2669
2670     my $localnet;
2671     if ($cluster_conf->{aliases}->{local_network}) {
2672         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2673     } else {
2674         $localnet = local_network() || '127.0.0.0/8';
2675         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2676     }
2677
2678     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2679
2680     my $ruleset = {};
2681
2682     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2683     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2684
2685     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2686
2687     my $hostfw_options = $hostfw_conf->{options} || {};
2688
2689     # fixme: what log level should we use here?
2690     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2691
2692     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2693
2694     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2695     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2696     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2697
2698     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2699     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2700
2701     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2702
2703     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2704     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2705
2706     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2707     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2708
2709     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2710
2711     generate_std_chains($ruleset, $hostfw_options);
2712
2713     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2714
2715     if ($hostfw_enable) {
2716         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2717         warn $@ if $@; # just to be sure - should not happen
2718     }
2719
2720     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2721
2722     # generate firewall rules for QEMU VMs
2723     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2724         eval {
2725             my $conf = $vmdata->{qemu}->{$vmid};
2726             my $vmfw_conf = $vmfw_configs->{$vmid};
2727             return if !$vmfw_conf;
2728             return if !$vmfw_conf->{options}->{enable};
2729
2730             foreach my $netid (keys %$conf) {
2731                 next if $netid !~ m/^net(\d+)$/;
2732                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2733                 next if !$net->{firewall};
2734                 my $iface = "tap${vmid}i$1";
2735
2736                 my $macaddr = $net->{macaddr};
2737                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2738                                              $vmfw_conf, $vmid, 'IN');
2739                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2740                                              $vmfw_conf, $vmid, 'OUT');
2741             }
2742         };
2743         warn $@ if $@; # just to be sure - should not happen
2744     }
2745
2746     # generate firewall rules for OpenVZ containers
2747     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2748         eval {
2749             my $conf = $vmdata->{openvz}->{$vmid};
2750
2751             my $vmfw_conf = $vmfw_configs->{$vmid};
2752             return if !$vmfw_conf;
2753             return if !$vmfw_conf->{options}->{enable};
2754
2755             if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2756                 my $ip = $conf->{ip_address}->{value};
2757                 $ip =~ s/\s+/,/g;
2758                 parse_address_list($ip); # make sure we have a valid $ip list
2759
2760                 my @ips = split(',', $ip);
2761
2762                 foreach my $singleip (@ips) {
2763                     my $venet0ipset = {};
2764                     $venet0ipset->{cidr} = $singleip;
2765                     push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2766                 }
2767
2768                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2769                 generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2770             }
2771
2772             if ($conf->{netif} && $conf->{netif}->{value}) {
2773                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2774                 foreach my $netid (keys %$netif) {
2775                     my $d = $netif->{$netid};
2776
2777                     my $macaddr = $d->{mac};
2778                     my $iface = $d->{host_ifname};
2779                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2780                                                  $vmfw_conf, $vmid, 'IN');
2781                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2782                                                  $vmfw_conf, $vmid, 'OUT');
2783                 }
2784             }
2785         };
2786         warn $@ if $@; # just to be sure - should not happen
2787     }
2788
2789     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2790         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2791     }
2792
2793     my $ipset_ruleset = {};
2794     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2795
2796     return ($ruleset, $ipset_ruleset);
2797 }
2798
2799 sub get_ruleset_status {
2800     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2801
2802     my $statushash = {};
2803
2804     foreach my $chain (sort keys %$ruleset) {
2805         my $sig = &$digest_fn($ruleset->{$chain});
2806
2807         $statushash->{$chain}->{sig} = $sig;
2808
2809         my $oldsig = $active_chains->{$chain};
2810         if (!defined($oldsig)) {
2811             $statushash->{$chain}->{action} = 'create';
2812         } else {
2813             if ($oldsig eq $sig) {
2814                 $statushash->{$chain}->{action} = 'exists';
2815             } else {
2816                 $statushash->{$chain}->{action} = 'update';
2817             }
2818         }
2819         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2820         foreach my $cmd (@{$ruleset->{$chain}}) {
2821             print "\t$cmd\n" if $verbose;
2822         }
2823     }
2824
2825     foreach my $chain (sort keys %$active_chains) {
2826         if (!defined($ruleset->{$chain})) {
2827             my $sig = $active_chains->{$chain};
2828             $statushash->{$chain}->{action} = 'delete';
2829             $statushash->{$chain}->{sig} = $sig;
2830             print "delete $chain ($sig)\n" if $verbose;
2831         }
2832     }
2833
2834     return $statushash;
2835 }
2836
2837 sub print_sig_rule {
2838     my ($chain, $sig) = @_;
2839
2840     # We just use this to store a SHA1 checksum used to detect changes
2841     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2842 }
2843
2844 sub get_ruleset_cmdlist {
2845     my ($ruleset, $verbose) = @_;
2846
2847     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2848
2849     my ($active_chains, $hooks) = iptables_get_chains();
2850     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2851
2852     # create missing chains first
2853     foreach my $chain (sort keys %$ruleset) {
2854         my $stat = $statushash->{$chain};
2855         die "internal error" if !$stat;
2856         next if $stat->{action} ne 'create';
2857
2858         $cmdlist .= ":$chain - [0:0]\n";
2859     }
2860
2861     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2862         if (!$hooks->{$h}) {
2863             $cmdlist .= "-A $h -j PVEFW-$h\n";
2864         }
2865     }
2866
2867     foreach my $chain (sort keys %$ruleset) {
2868         my $stat = $statushash->{$chain};
2869         die "internal error" if !$stat;
2870
2871         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2872             $cmdlist .= "-F $chain\n";
2873             foreach my $cmd (@{$ruleset->{$chain}}) {
2874                 $cmdlist .= "$cmd\n";
2875             }
2876             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2877         } elsif ($stat->{action} eq 'delete') {
2878             die "internal error"; # this should not happen
2879         } elsif ($stat->{action} eq 'exists') {
2880             # do nothing
2881         } else {
2882             die "internal error - unknown status '$stat->{action}'";
2883         }
2884     }
2885
2886     foreach my $chain (keys %$statushash) {
2887         next if $statushash->{$chain}->{action} ne 'delete';
2888         $cmdlist .= "-F $chain\n";
2889     }
2890     foreach my $chain (keys %$statushash) {
2891         next if $statushash->{$chain}->{action} ne 'delete';
2892         next if $chain eq 'PVEFW-INPUT';
2893         next if $chain eq 'PVEFW-OUTPUT';
2894         next if $chain eq 'PVEFW-FORWARD';
2895         $cmdlist .= "-X $chain\n";
2896     }
2897
2898     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2899
2900     $cmdlist .= "COMMIT\n";
2901
2902     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2903 }
2904
2905 sub get_ipset_cmdlist {
2906     my ($ruleset, $verbose) = @_;
2907
2908     my $cmdlist = "";
2909
2910     my $delete_cmdlist = "";
2911
2912     my $active_chains = ipset_get_chains();
2913     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2914
2915     # remove stale _swap chains
2916     foreach my $chain (keys %$active_chains) {
2917         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2918             $cmdlist .= "destroy $chain\n";
2919         }
2920     }
2921
2922     foreach my $chain (sort keys %$ruleset) {
2923         my $stat = $statushash->{$chain};
2924         die "internal error" if !$stat;
2925
2926         if ($stat->{action} eq 'create') {
2927             foreach my $cmd (@{$ruleset->{$chain}}) {
2928                 $cmdlist .= "$cmd\n";
2929             }
2930         }
2931
2932         if ($stat->{action} eq 'update') {
2933             my $chain_swap = $chain."_swap";
2934
2935             foreach my $cmd (@{$ruleset->{$chain}}) {
2936                 $cmd =~ s/$chain/$chain_swap/;
2937                 $cmdlist .= "$cmd\n";
2938             }
2939             $cmdlist .= "swap $chain_swap $chain\n";
2940             $cmdlist .= "flush $chain_swap\n";
2941             $cmdlist .= "destroy $chain_swap\n";
2942         }
2943
2944     }
2945
2946     foreach my $chain (keys %$statushash) {
2947         next if $statushash->{$chain}->{action} ne 'delete';
2948
2949         $delete_cmdlist .= "flush $chain\n";
2950         $delete_cmdlist .= "destroy $chain\n";
2951     }
2952
2953     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2954
2955     return ($cmdlist, $delete_cmdlist, $changes);
2956 }
2957
2958 sub apply_ruleset {
2959     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2960
2961     enable_bridge_firewall();
2962
2963     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2964         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2965
2966     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2967
2968     if ($verbose) {
2969         if ($ipset_changes) {
2970             print "ipset changes:\n";
2971             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2972             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2973         }
2974
2975         if ($changes) {
2976             print "iptables changes:\n";
2977             print $cmdlist;
2978         }
2979     }
2980
2981     ipset_restore_cmdlist($ipset_create_cmdlist);
2982
2983     iptables_restore_cmdlist($cmdlist);
2984
2985     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2986
2987     # test: re-read status and check if everything is up to date
2988     my $active_chains = iptables_get_chains();
2989     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2990
2991     my $errors;
2992     foreach my $chain (sort keys %$ruleset) {
2993         my $stat = $statushash->{$chain};
2994         if ($stat->{action} ne 'exists') {
2995             warn "unable to update chain '$chain'\n";
2996             $errors = 1;
2997         }
2998     }
2999
3000     die "unable to apply firewall changes\n" if $errors;
3001
3002     update_nf_conntrack_max($hostfw_conf);
3003
3004     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3005
3006 }
3007
3008 sub update_nf_conntrack_max {
3009     my ($hostfw_conf) = @_;
3010
3011     my $max = 65536; # reasonable default
3012
3013     my $options = $hostfw_conf->{options} || {};
3014
3015     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3016         $max = $options->{nf_conntrack_max};
3017         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3018     }
3019
3020     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3021     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3022
3023     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3024
3025     if ($current != $max) {
3026         my $hashsize = int($max/4);
3027         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3028         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3029     }
3030 }
3031
3032 sub update_nf_conntrack_tcp_timeout_established {
3033     my ($hostfw_conf) = @_;
3034
3035     my $options = $hostfw_conf->{options} || {};
3036
3037     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3038
3039     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3040 }
3041
3042 sub remove_pvefw_chains {
3043
3044     my ($chash, $hooks) = iptables_get_chains();
3045     my $cmdlist = "*filter\n";
3046
3047     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3048         if ($hooks->{$h}) {
3049             $cmdlist .= "-D $h -j PVEFW-$h\n";
3050         }
3051     }
3052
3053     foreach my $chain (keys %$chash) {
3054         $cmdlist .= "-F $chain\n";
3055     }
3056
3057     foreach my $chain (keys %$chash) {
3058         $cmdlist .= "-X $chain\n";
3059     }
3060     $cmdlist .= "COMMIT\n";
3061
3062     iptables_restore_cmdlist($cmdlist);
3063 }
3064
3065 sub init {
3066     my $cluster_conf = load_clusterfw_conf();
3067     my $cluster_options = $cluster_conf->{options};
3068     my $enable = $cluster_options->{enable};
3069
3070     return if !$enable;
3071
3072     # load required modules here
3073 }
3074
3075 sub update {
3076     my $code = sub {
3077
3078         my $cluster_conf = load_clusterfw_conf();
3079         my $cluster_options = $cluster_conf->{options};
3080
3081         my $enable = $cluster_options->{enable};
3082
3083         die "Firewall is disabled - cannot start\n" if !$enable;
3084
3085         if (!$enable) {
3086             PVE::Firewall::remove_pvefw_chains();
3087             return;
3088         }
3089
3090         my $hostfw_conf = load_hostfw_conf();
3091
3092         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3093
3094         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3095     };
3096
3097     run_locked($code);
3098 }
3099
3100 1;