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_clusternet = {
 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 $cluster_network;
 709
 710 sub get_cluster_network {
 711
 712     return $cluster_network if defined($cluster_network);
 713
 714     eval {
 715         my $nodename = PVE::INotify::nodename();
 716
 717         my $ip = PVE::Cluster::remote_node_ip($nodename);
 718
 719         my $testip = Net::IP->new($ip);
 720
 721         my $routes = PVE::ProcFSTools::read_proc_net_route();
 722         foreach my $entry (@$routes) {
 723             my $mask = $ipv4_mask_hash_clusternet->{$entry->{mask}};
 724             next if !defined($mask);
 725             return if $mask eq '0.0.0.0';
 726             my $cidr = "$entry->{dest}/$mask";
 727             my $testnet = Net::IP->new($cidr);
 728             if ($testnet->overlaps($testip)) {
 729                 $cluster_network = $cidr;
 730                 return;
 731             }
 732         }
 733     };
 734     warn $@ if $@;
 735
 736     return $cluster_network;
 737 }
 738
 739 sub parse_address_list {
 740     my ($str) = @_;
 741
 742     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 743     return if $str =~ m/^${ip_alias_pattern}$/;
 744
 745     my $count = 0;
 746     my $iprange = 0;
 747     foreach my $elem (split(/,/, $str)) {
 748         $count++;
 749         if (!Net::IP->new($elem)) {
 750             my $err = Net::IP::Error();
 751             die "invalid IP address: $err\n";
 752         }
 753         $iprange = 1 if $elem =~ m/-/;
 754     }
 755
 756     die "you can use a range in a list\n" if $iprange && $count > 1;
 757 }
 758
 759 sub parse_port_name_number_or_range {
 760     my ($str) = @_;
 761
 762     my $services = PVE::Firewall::get_etc_services();
 763     my $count = 0;
 764     my $icmp_port = 0;
 765
 766     foreach my $item (split(/,/, $str)) {
 767         $count++;
 768         if ($item =~ m/^(\d+):(\d+)$/) {
 769             my ($port1, $port2) = ($1, $2);
 770             die "invalid port '$port1'\n" if $port1 > 65535;
 771             die "invalid port '$port2'\n" if $port2 > 65535;
 772         } elsif ($item =~ m/^(\d+)$/) {
 773             my $port = $1;
 774             die "invalid port '$port'\n" if $port > 65535;
 775         } else {
 776             if ($icmp_type_names->{$item}) {
 777                 $icmp_port = 1;
 778             } else {
 779                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 780             }
 781         }
 782     }
 783
 784     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 785
 786     return $count;
 787 }
 788
 789 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 790 sub pve_fw_verify_port_spec {
 791    my ($portstr) = @_;
 792
 793    parse_port_name_number_or_range($portstr);
 794
 795    return $portstr;
 796 }
 797
 798 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 799 sub pve_fw_verify_v4addr_spec {
 800    my ($list) = @_;
 801
 802    parse_address_list($list);
 803
 804    return $list;
 805 }
 806
 807 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 808 sub pve_fw_verify_protocol_spec {
 809    my ($proto) = @_;
 810
 811    my $protocols = get_etc_protocols();
 812
 813    die "unknown protocol '$proto'\n" if $proto &&
 814        !(defined($protocols->{byname}->{$proto}) ||
 815          defined($protocols->{byid}->{$proto}));
 816
 817    return $proto;
 818 }
 819
 820
 821 # helper function for API
 822
 823 sub copy_opject_with_digest {
 824     my ($object) = @_;
 825
 826     my $sha = Digest::SHA->new('sha1');
 827
 828     my $res = {};
 829     foreach my $k (sort keys %$object) {
 830         my $v = $object->{$k};
 831         next if !defined($v);
 832         $res->{$k} = $v;
 833         $sha->add($k, ':', $v, "\n");
 834     }
 835
 836     my $digest = $sha->hexdigest;
 837
 838     $res->{digest} = $digest;
 839
 840     return wantarray ? ($res, $digest) : $res;
 841 }
 842
 843 sub copy_list_with_digest {
 844     my ($list) = @_;
 845
 846     my $sha = Digest::SHA->new('sha1');
 847
 848     my $res = [];
 849     foreach my $entry (@$list) {
 850         my $data = {};
 851         foreach my $k (sort keys %$entry) {
 852             my $v = $entry->{$k};
 853             next if !defined($v);
 854             $data->{$k} = $v;
 855             $sha->add($k, ':', $v, "\n");
 856         }
 857         push @$res, $data;
 858     }
 859
 860     my $digest = $sha->hexdigest;
 861
 862     foreach my $entry (@$res) {
 863         $entry->{digest} = $digest;
 864     }
 865
 866     return wantarray ? ($res, $digest) : $res;
 867 }
 868
 869 my $rule_properties = {
 870     pos => {
 871         description => "Update rule at position <pos>.",
 872         type => 'integer',
 873         minimum => 0,
 874         optional => 1,
 875     },
 876     digest => get_standard_option('pve-config-digest'),
 877     type => {
 878         type => 'string',
 879         optional => 1,
 880         enum => ['in', 'out', 'group'],
 881     },
 882     action => {
 883         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 884         type => 'string',
 885         optional => 1,
 886         pattern => $security_group_name_pattern,
 887         maxLength => 20,
 888         minLength => 2,
 889     },
 890     macro => {
 891         type => 'string',
 892         optional => 1,
 893         maxLength => 128,
 894     },
 895     iface => get_standard_option('pve-iface', { optional => 1 }),
 896     source => {
 897         type => 'string', format => 'pve-fw-v4addr-spec',
 898         optional => 1,
 899     },
 900     dest => {
 901         type => 'string', format => 'pve-fw-v4addr-spec',
 902         optional => 1,
 903     },
 904     proto => {
 905         type => 'string', format => 'pve-fw-protocol-spec',
 906         optional => 1,
 907     },
 908     enable => {
 909         type => 'boolean',
 910         optional => 1,
 911     },
 912     sport => {
 913         type => 'string', format => 'pve-fw-port-spec',
 914         optional => 1,
 915     },
 916     dport => {
 917         type => 'string', format => 'pve-fw-port-spec',
 918         optional => 1,
 919     },
 920     comment => {
 921         type => 'string',
 922         optional => 1,
 923     },
 924 };
 925
 926 sub add_rule_properties {
 927     my ($properties) = @_;
 928
 929     foreach my $k (keys %$rule_properties) {
 930         my $h = $rule_properties->{$k};
 931         # copy data, so that we can modify later without side effects
 932         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 933     }
 934
 935     return $properties;
 936 }
 937
 938 sub delete_rule_properties {
 939     my ($rule, $delete_str) = @_;
 940
 941     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 942         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 943             if !defined($rule_properties->{$opt});
 944         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 945             if $opt eq 'type' || $opt eq 'action';
 946         delete $rule->{$opt};
 947     }
 948
 949     return $rule;
 950 }
 951
 952 my $apply_macro = sub {
 953     my ($macro_name, $param, $verify) = @_;
 954
 955     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 956     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 957
 958     my $rules = [];
 959
 960     foreach my $templ (@$macro_rules) {
 961         my $rule = {};
 962         my $param_used = {};
 963         foreach my $k (keys %$templ) {
 964             my $v = $templ->{$k};
 965             if ($v eq 'PARAM') {
 966                 $v = $param->{$k};
 967                 $param_used->{$k} = 1;
 968             } elsif ($v eq 'DEST') {
 969                 $v = $param->{dest};
 970                 $param_used->{dest} = 1;
 971             } elsif ($v eq 'SOURCE') {
 972                 $v = $param->{source};
 973                 $param_used->{source} = 1;
 974             }
 975
 976             if (!defined($v)) {
 977                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 978                 raise_param_exc({ macro => $msg }) if $verify;
 979                 die "$msg\n";
 980             }
 981             $rule->{$k} = $v;
 982         }
 983         foreach my $k (keys %$param) {
 984             next if $k eq 'macro';
 985             next if !defined($param->{$k});
 986             next if $param_used->{$k};
 987             if (defined($rule->{$k})) {
 988                 if ($rule->{$k} ne $param->{$k}) {
 989                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 990                     raise_param_exc({ $k => $msg }) if $verify;
 991                     die "$msg\n";
 992                 }
 993             } else {
 994                 $rule->{$k} = $param->{$k};
 995             }
 996         }
 997         push @$rules, $rule;
 998     }
 999
1000     return $rules;
1001 };
1002
1003 sub verify_rule {
1004     my ($rule, $allow_groups) = @_;
1005
1006     my $type = $rule->{type};
1007
1008     raise_param_exc({ type => "missing property"}) if !$type;
1009     raise_param_exc({ action => "missing property"}) if !$rule->{action};
1010
1011     if ($type eq  'in' || $type eq 'out') {
1012         raise_param_exc({ action => "unknown action '$rule->{action}'"})
1013             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
1014     } elsif ($type eq 'group') {
1015         raise_param_exc({ type => "security groups not allowed"})
1016             if !$allow_groups;
1017         raise_param_exc({ action => "invalid characters in security group name"})
1018             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
1019     } else {
1020         raise_param_exc({ type => "unknown rule type '$type'"});
1021     }
1022
1023     if ($rule->{iface}) {
1024         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1025         raise_param_exc({ iface => $@ }) if $@;
1026     }
1027
1028     if ($rule->{macro}) {
1029         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1030         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1031         $rule->{macro} = $preferred_name;
1032     }
1033
1034     if ($rule->{dport}) {
1035         eval { parse_port_name_number_or_range($rule->{dport}); };
1036         raise_param_exc({ dport => $@ }) if $@;
1037     }
1038
1039     if ($rule->{sport}) {
1040         eval { parse_port_name_number_or_range($rule->{sport}); };
1041         raise_param_exc({ sport => $@ }) if $@;
1042     }
1043
1044     if ($rule->{source}) {
1045         eval { parse_address_list($rule->{source}); };
1046         raise_param_exc({ source => $@ }) if $@;
1047     }
1048
1049     if ($rule->{dest}) {
1050         eval { parse_address_list($rule->{dest}); };
1051         raise_param_exc({ dest => $@ }) if $@;
1052     }
1053
1054     if ($rule->{macro}) {
1055         &$apply_macro($rule->{macro}, $rule, 1);
1056     }
1057
1058     return $rule;
1059 }
1060
1061 sub copy_rule_data {
1062     my ($rule, $param) = @_;
1063
1064     foreach my $k (keys %$rule_properties) {
1065         if (defined(my $v = $param->{$k})) {
1066             if ($v eq '' || $v eq '-') {
1067                 delete $rule->{$k};
1068             } else {
1069                 $rule->{$k} = $v;
1070             }
1071         } else {
1072             delete $rule->{$k};
1073         }
1074     }
1075
1076     # verify rule now
1077
1078     return $rule;
1079 }
1080
1081 # core functions
1082 my $bridge_firewall_enabled = 0;
1083
1084 sub enable_bridge_firewall {
1085
1086     return if $bridge_firewall_enabled; # only once
1087
1088     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1089     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1090
1091     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1092     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1093
1094     $bridge_firewall_enabled = 1;
1095 }
1096
1097 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1098
1099 sub iptables_restore_cmdlist {
1100     my ($cmdlist) = @_;
1101
1102     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1103 }
1104
1105 sub ipset_restore_cmdlist {
1106     my ($cmdlist) = @_;
1107
1108     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1109 }
1110
1111 sub iptables_get_chains {
1112
1113     my $res = {};
1114
1115     # check what chains we want to track
1116     my $is_pvefw_chain = sub {
1117         my $name = shift;
1118
1119         return 1 if $name =~ m/^PVEFW-\S+$/;
1120
1121         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1122
1123         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1124
1125         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1126
1127         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1128         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1129
1130         return undef;
1131     };
1132
1133     my $table = '';
1134
1135     my $hooks = {};
1136
1137     my $parser = sub {
1138         my $line = shift;
1139
1140         return if $line =~ m/^#/;
1141         return if $line =~ m/^\s*$/;
1142
1143         if ($line =~ m/^\*(\S+)$/) {
1144             $table = $1;
1145             return;
1146         }
1147
1148         return if $table ne 'filter';
1149
1150         if ($line =~ m/^:(\S+)\s/) {
1151             my $chain = $1;
1152             return if !&$is_pvefw_chain($chain);
1153             $res->{$chain} = "unknown";
1154         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1155             my ($chain, $sig) = ($1, $2);
1156             return if !&$is_pvefw_chain($chain);
1157             $res->{$chain} = $sig;
1158         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1159             $hooks->{$1} = 1;
1160         } else {
1161             # simply ignore the rest
1162             return;
1163         }
1164     };
1165
1166     run_command("/sbin/iptables-save", outfunc => $parser);
1167
1168     return wantarray ? ($res, $hooks) : $res;
1169 }
1170
1171 sub iptables_chain_digest {
1172     my ($rules) = @_;
1173     my $digest = Digest::SHA->new('sha1');
1174     foreach my $rule (@$rules) { # order is important
1175         $digest->add($rule);
1176     }
1177     return $digest->b64digest;
1178 }
1179
1180 sub ipset_chain_digest {
1181     my ($rules) = @_;
1182
1183     my $digest = Digest::SHA->new('sha1');
1184     foreach my $rule (sort @$rules) { # note: sorted
1185         $digest->add($rule);
1186     }
1187     return $digest->b64digest;
1188 }
1189
1190 sub ipset_get_chains {
1191
1192     my $res = {};
1193     my $chains = {};
1194
1195     my $parser = sub {
1196         my $line = shift;
1197
1198         return if $line =~ m/^#/;
1199         return if $line =~ m/^\s*$/;
1200         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1201             my $chain = $1;
1202             $line =~ s/\s+$//; # delete trailing white space
1203             push @{$chains->{$chain}}, $line;
1204         } else {
1205             # simply ignore the rest
1206             return;
1207         }
1208     };
1209
1210     run_command("/usr/sbin/ipset save", outfunc => $parser);
1211
1212     # compute digest for each chain
1213     foreach my $chain (keys %$chains) {
1214         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1215     }
1216
1217     return $res;
1218 }
1219
1220 sub ruleset_generate_cmdstr {
1221     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1222
1223     return if defined($rule->{enable}) && !$rule->{enable};
1224
1225     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1226
1227     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1228     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1229
1230     my @cmd = ();
1231
1232     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1233     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1234
1235     my $source = $rule->{source};
1236     my $dest = $rule->{dest};
1237
1238     if ($source) {
1239         if ($source =~ m/^\+/) {
1240             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1241                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1242                 push @cmd, "-m set --match-set PVEFW-$1 src";
1243             } else {
1244                 die "invalid security group name '$source'\n";
1245             }
1246         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1247             my $alias = lc($source);
1248             my $e = $cluster_conf->{aliases}->{$alias};
1249             die "no such alias $source\n" if !$e;
1250             push @cmd, "-s $e->{cidr}";
1251         } elsif ($source =~ m/\-/){
1252             push @cmd, "-m iprange --src-range $source";
1253
1254         } else {
1255             push @cmd, "-s $source";
1256         }
1257     }
1258
1259     if ($dest) {
1260         if ($dest =~ m/^\+/) {
1261             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1262                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1263                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1264             } else {
1265                 die "invalid security group name '$dest'\n";
1266             }
1267         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1268             my $alias = lc($dest);
1269             my $e = $cluster_conf->{aliases}->{$alias};
1270             die "no such alias $dest" if !$e;
1271             push @cmd, "-d $e->{cidr}";
1272         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1273             push @cmd, "-m iprange --dst-range $dest";
1274
1275         } else {
1276             push @cmd, "-d $dest";
1277         }
1278     }
1279
1280     if ($rule->{proto}) {
1281         push @cmd, "-p $rule->{proto}";
1282
1283         my $multiport = 0;
1284         $multiport++ if $nbdport > 1;
1285         $multiport++ if $nbsport > 1;
1286
1287         push @cmd, "--match multiport" if $multiport;
1288
1289         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1290             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1291
1292         if ($rule->{dport}) {
1293             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1294                 # Note: we use dport to store --icmp-type
1295                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1296                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1297             } else {
1298                 if ($nbdport > 1) {
1299                     if ($multiport == 2) {
1300                         push @cmd,  "--ports $rule->{dport}";
1301                     } else {
1302                         push @cmd, "--dports $rule->{dport}";
1303                     }
1304                 } else {
1305                     push @cmd, "--dport $rule->{dport}";
1306                 }
1307             }
1308         }
1309
1310         if ($rule->{sport}) {
1311             if ($nbsport > 1) {
1312                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1313             } else {
1314                 push @cmd, "--sport $rule->{sport}";
1315             }
1316         }
1317     } elsif ($rule->{dport} || $rule->{sport}) {
1318         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1319         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1320     }
1321
1322     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1323
1324     if (my $action = $rule->{action}) {
1325         $action = $actions->{$action} if defined($actions->{$action});
1326         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1327         push @cmd, $goto ? "-g $action" : "-j $action";
1328     }
1329
1330     return scalar(@cmd) ? join(' ', @cmd) : undef;
1331 }
1332
1333 sub ruleset_generate_rule {
1334     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1335
1336     my $rules;
1337
1338     if ($rule->{macro}) {
1339         $rules = &$apply_macro($rule->{macro}, $rule);
1340     } else {
1341         $rules = [ $rule ];
1342     }
1343
1344     # update all or nothing
1345
1346     my @cmds = ();
1347     foreach my $tmp (@$rules) {
1348         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1349             push @cmds, $cmdstr;
1350         }
1351     }
1352
1353     foreach my $cmdstr (@cmds) {
1354         ruleset_addrule($ruleset, $chain, $cmdstr);
1355     }
1356 }
1357
1358 sub ruleset_generate_rule_insert {
1359     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1360
1361     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1362
1363     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1364         ruleset_insertrule($ruleset, $chain, $cmdstr);
1365     }
1366 }
1367
1368 sub ruleset_create_chain {
1369     my ($ruleset, $chain) = @_;
1370
1371     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1372     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1373
1374     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1375
1376     $ruleset->{$chain} = [];
1377 }
1378
1379 sub ruleset_chain_exist {
1380     my ($ruleset, $chain) = @_;
1381
1382     return $ruleset->{$chain} ? 1 : undef;
1383 }
1384
1385 sub ruleset_addrule {
1386    my ($ruleset, $chain, $rule) = @_;
1387
1388    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1389
1390    push @{$ruleset->{$chain}}, "-A $chain $rule";
1391 }
1392
1393 sub ruleset_insertrule {
1394    my ($ruleset, $chain, $rule) = @_;
1395
1396    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1397
1398    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1399 }
1400
1401 sub get_log_rule_base {
1402     my ($chain, $vmid, $msg, $loglevel) = @_;
1403
1404     die "internal error - no log level" if !defined($loglevel);
1405
1406     $vmid = 0 if !defined($vmid);
1407
1408     # Note: we use special format for prefix to pass further
1409     # info to log daemon (VMID, LOGVELEL and CHAIN)
1410
1411     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1412 }
1413
1414 sub ruleset_addlog {
1415     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1416
1417     return if !defined($loglevel);
1418
1419     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1420
1421     $logrule = "$rule $logrule" if defined($rule);
1422
1423     ruleset_addrule($ruleset, $chain, $logrule);
1424 }
1425
1426 sub ruleset_add_chain_policy {
1427     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1428
1429     if ($policy eq 'ACCEPT') {
1430
1431         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1432                               { ACCEPT =>  $accept_action});
1433
1434     } elsif ($policy eq 'DROP') {
1435
1436         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1437
1438         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1439
1440         ruleset_addrule($ruleset, $chain, "-j DROP");
1441     } elsif ($policy eq 'REJECT') {
1442         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1443
1444         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1445
1446         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1447     } else {
1448         # should not happen
1449         die "internal error: unknown policy '$policy'";
1450     }
1451 }
1452
1453 sub ruleset_chain_add_conn_filters {
1454     my ($ruleset, $chain, $accept) = @_;
1455
1456     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1457     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1458 }
1459
1460 sub ruleset_chain_add_input_filters {
1461     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1462
1463     if ($cluster_conf->{ipset}->{blacklist}){
1464         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1465         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1466     }
1467
1468     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1469         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1470     }
1471
1472     if ($options->{tcpflags}) {
1473         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1474     }
1475 }
1476
1477 sub ruleset_create_vm_chain {
1478     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1479
1480     ruleset_create_chain($ruleset, $chain);
1481     my $accept = generate_nfqueue($options);
1482
1483     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1484         if ($direction eq 'OUT') {
1485             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1486                                                       proto => 'udp', sport => 68, dport => 67 });
1487         } else {
1488             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1489                                                       proto => 'udp', sport => 67, dport => 68 });
1490         }
1491     }
1492
1493     if ($direction eq 'OUT') {
1494         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1495             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1496         }
1497         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1498     }
1499 }
1500
1501 sub ruleset_add_group_rule {
1502     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1503
1504     my $group = $rule->{action};
1505     my $group_chain = "GROUP-$group-$direction";
1506     if(!ruleset_chain_exist($ruleset, $group_chain)){
1507         generate_group_rules($ruleset, $cluster_conf, $group);
1508     }
1509
1510     if ($direction eq 'OUT' && $rule->{iface_out}) {
1511         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1512     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1513         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1514     } else {
1515         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1516     }
1517
1518     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1519 }
1520
1521 sub ruleset_generate_vm_rules {
1522     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1523
1524     my $lc_direction = lc($direction);
1525
1526     my $in_accept = generate_nfqueue($options);
1527
1528     foreach my $rule (@$rules) {
1529         next if $rule->{iface} && $rule->{iface} ne $netid;
1530         next if !$rule->{enable};
1531         if ($rule->{type} eq 'group') {
1532             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1533                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1534         } else {
1535             next if $rule->{type} ne $lc_direction;
1536             eval {
1537                 if ($direction eq 'OUT') {
1538                     ruleset_generate_rule($ruleset, $chain, $rule,
1539                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1540                                           undef, $cluster_conf);
1541                 } else {
1542                     ruleset_generate_rule($ruleset, $chain, $rule,
1543                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1544                                           undef, $cluster_conf);
1545                 }
1546             };
1547             warn $@ if $@;
1548         }
1549     }
1550 }
1551
1552 sub generate_nfqueue {
1553     my ($options) = @_;
1554
1555     if ($options->{ips}) {
1556         my $action = "NFQUEUE";
1557         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1558             if (defined($3) && defined($1)) {
1559                 $action .= " --queue-balance $1:$3";
1560             } elsif (defined($1)) {
1561                 $action .= " --queue-num $1";
1562             }
1563         }
1564         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1565         return $action;
1566     } else {
1567         return "ACCEPT";
1568     }
1569 }
1570
1571 sub ruleset_generate_vm_ipsrules {
1572     my ($ruleset, $options, $direction, $iface) = @_;
1573
1574     if ($options->{ips} && $direction eq 'IN') {
1575         my $nfqueue = generate_nfqueue($options);
1576
1577         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1578             ruleset_create_chain($ruleset, "PVEFW-IPS");
1579         }
1580
1581         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1582     }
1583 }
1584
1585 sub generate_venet_rules_direction {
1586     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1587
1588     my $lc_direction = lc($direction);
1589
1590     my $rules = $vmfw_conf->{rules};
1591
1592     my $options = $vmfw_conf->{options};
1593     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1594
1595     my $chain = "venet0-$vmid-$direction";
1596
1597     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1598
1599     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1600
1601     # implement policy
1602     my $policy;
1603
1604     if ($direction eq 'OUT') {
1605         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1606     } else {
1607         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1608     }
1609
1610     my $accept = generate_nfqueue($options);
1611     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1612     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1613
1614     if ($direction eq 'OUT') {
1615         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1616             action => $chain,
1617             source => $ip,
1618             iface_in => 'venet0'});
1619     } else {
1620         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1621             action => $chain,
1622             dest => $ip,
1623             iface_out => 'venet0'});
1624     }
1625 }
1626
1627 sub generate_tap_rules_direction {
1628     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1629
1630     my $lc_direction = lc($direction);
1631
1632     my $rules = $vmfw_conf->{rules};
1633
1634     my $options = $vmfw_conf->{options};
1635     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1636
1637     my $tapchain = "$iface-$direction";
1638
1639     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1640
1641     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1642
1643     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1644
1645     # implement policy
1646     my $policy;
1647
1648     if ($direction eq 'OUT') {
1649         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1650     } else {
1651         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1652     }
1653
1654     my $accept = generate_nfqueue($options);
1655     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1656     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1657
1658     # plug the tap chain to bridge chain
1659     if ($direction eq 'IN') {
1660         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1661                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1662     } else {
1663         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1664                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1665     }
1666 }
1667
1668 sub enable_host_firewall {
1669     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1670
1671     my $options = $hostfw_conf->{options};
1672     my $cluster_options = $cluster_conf->{options};
1673     my $rules = $hostfw_conf->{rules};
1674     my $cluster_rules = $cluster_conf->{rules};
1675
1676     # host inbound firewall
1677     my $chain = "PVEFW-HOST-IN";
1678     ruleset_create_chain($ruleset, $chain);
1679
1680     my $loglevel = get_option_log_level($options, "log_level_in");
1681
1682     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1683
1684     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1685     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1686
1687     # we use RETURN because we need to check also tap rules
1688     my $accept_action = 'RETURN';
1689
1690     # add host rules first, so that cluster wide rules can be overwritten
1691     foreach my $rule (@$rules, @$cluster_rules) {
1692         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1693         if ($rule->{type} eq 'group') {
1694             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1695         } elsif ($rule->{type} eq 'in') {
1696             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1697                                   undef, $cluster_conf);
1698         }
1699         delete $rule->{iface_in};
1700     }
1701
1702     my $clusternet = get_cluster_network();
1703
1704     # allow standard traffic on cluster network
1705     if ($clusternet) {
1706         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 8006 -j $accept_action");  # PVE API
1707         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1708         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1709         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 22 -j $accept_action");  # SSH
1710
1711         # corosync
1712         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j $accept_action";
1713         ruleset_addrule($ruleset, $chain, "-s $clusternet -d $clusternet $corosync_rule");
1714         ruleset_addrule($ruleset, $chain, "-s $clusternet -m addrtype --dst-type MULTICAST $corosync_rule");
1715     }
1716
1717     # implement input policy
1718     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1719     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1720
1721     # host outbound firewall
1722     $chain = "PVEFW-HOST-OUT";
1723     ruleset_create_chain($ruleset, $chain);
1724
1725     $loglevel = get_option_log_level($options, "log_level_out");
1726
1727     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1728
1729     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1730
1731     # we use RETURN because we may want to check other thigs later
1732     $accept_action = 'RETURN';
1733
1734     # add host rules first, so that cluster wide rules can be overwritten
1735     foreach my $rule (@$rules, @$cluster_rules) {
1736         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1737         if ($rule->{type} eq 'group') {
1738             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1739         } elsif ($rule->{type} eq 'out') {
1740             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1741                                   undef, $cluster_conf);
1742         }
1743         delete $rule->{iface_out};
1744     }
1745
1746     # allow standard traffic on cluster network
1747     if ($clusternet) {
1748         ruleset_addrule($ruleset, $chain, "-d $clusternet -p tcp --dport 8006 -j $accept_action");  # PVE API
1749         ruleset_addrule($ruleset, $chain, "-d $clusternet -p tcp --dport 22 -j $accept_action");  # SSH
1750
1751         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j $accept_action";
1752         ruleset_addrule($ruleset, $chain, "-s $clusternet -d $clusternet $corosync_rule");
1753         ruleset_addrule($ruleset, $chain, "-s $clusternet -m addrtype --dst-type MULTICAST $corosync_rule");
1754     }
1755
1756     # implement output policy
1757     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1758     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1759
1760     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1761     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1762 }
1763
1764 sub generate_group_rules {
1765     my ($ruleset, $cluster_conf, $group) = @_;
1766
1767     my $rules = $cluster_conf->{groups}->{$group};
1768
1769     if (!$rules) {
1770         warn "no such security group '$group'\n";
1771         $rules = []; # create empty chain
1772     }
1773
1774     my $chain = "GROUP-${group}-IN";
1775
1776     ruleset_create_chain($ruleset, $chain);
1777     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1778
1779     foreach my $rule (@$rules) {
1780         next if $rule->{type} ne 'in';
1781         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1782     }
1783
1784     $chain = "GROUP-${group}-OUT";
1785
1786     ruleset_create_chain($ruleset, $chain);
1787     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1788
1789     foreach my $rule (@$rules) {
1790         next if $rule->{type} ne 'out';
1791         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1792         # check also other tap rules later
1793         ruleset_generate_rule($ruleset, $chain, $rule,
1794                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1795     }
1796 }
1797
1798 my $MAX_NETS = 32;
1799 my $valid_netdev_names = {};
1800 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1801     $valid_netdev_names->{"net$i"} = 1;
1802 }
1803
1804 sub parse_fw_rule {
1805     my ($line, $allow_iface, $allow_groups) = @_;
1806
1807     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1808
1809     chomp $line;
1810
1811     # we can add single line comments to the end of the rule
1812     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1813
1814     # we can disable a rule when prefixed with '|'
1815     my $enable = 1;
1816
1817     $enable = 0 if $line =~ s/^\|//;
1818
1819     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1820         die "unable to parse rule: $line\n";
1821
1822     $type = lc($1);
1823     $action = $2;
1824
1825     if ($type eq  'in' || $type eq 'out') {
1826         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1827             # OK
1828         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1829             $action = $2;
1830             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1831             die "unknown macro '$1'\n" if !$preferred_name;
1832             $macro = $preferred_name;
1833         } else {
1834             die "unknown action '$action'\n";
1835         }
1836     } elsif ($type eq 'group') {
1837         die "groups disabled\n" if !$allow_groups;
1838         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1839     } else {
1840         die "unknown rule type '$type'\n";
1841     }
1842
1843     while (length($line)) {
1844         if ($line =~ s/^-i (\S+)\s*//) {
1845             die "parameter -i not allowed\n" if !$allow_iface;
1846             $iface = $1;
1847             PVE::JSONSchema::pve_verify_iface($iface);
1848             next;
1849         }
1850
1851         last if $type eq 'group';
1852
1853         if ($line =~ s/^-p (\S+)\s*//) {
1854             $proto = $1;
1855             pve_fw_verify_protocol_spec($proto);
1856             next;
1857         }
1858         if ($line =~ s/^-dport (\S+)\s*//) {
1859             $dport = $1;
1860             parse_port_name_number_or_range($dport);
1861             next;
1862         }
1863         if ($line =~ s/^-sport (\S+)\s*//) {
1864             $sport = $1;
1865             parse_port_name_number_or_range($sport);
1866             next;
1867         }
1868         if ($line =~ s/^-source (\S+)\s*//) {
1869             $source = $1;
1870             parse_address_list($source);
1871             next;
1872         }
1873         if ($line =~ s/^-dest (\S+)\s*//) {
1874             $dest = $1;
1875             parse_address_list($dest);
1876             next;
1877         }
1878
1879         last;
1880     }
1881
1882     die "unable to parse rule parameters: $line\n" if length($line);
1883
1884     return {
1885         type => $type,
1886         enable => $enable,
1887         comment => $comment,
1888         action => $action,
1889         macro => $macro,
1890         iface => $iface,
1891         source => $source,
1892         dest => $dest,
1893         proto => $proto,
1894         dport => $dport,
1895         sport => $sport,
1896     };
1897 }
1898
1899 sub parse_vmfw_option {
1900     my ($line) = @_;
1901
1902     my ($opt, $value);
1903
1904     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1905
1906     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1907         $opt = lc($1);
1908         $value = int($2);
1909     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1910         $opt = lc($1);
1911         $value = $2 ? lc($3) : '';
1912     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1913         $opt = lc($1);
1914         $value = uc($3);
1915     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1916         $opt = lc($1);
1917         $value = $2;
1918     } else {
1919         chomp $line;
1920         die "can't parse option '$line'\n"
1921     }
1922
1923     return ($opt, $value);
1924 }
1925
1926 sub parse_hostfw_option {
1927     my ($line) = @_;
1928
1929     my ($opt, $value);
1930
1931     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1932
1933     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1934         $opt = lc($1);
1935         $value = int($2);
1936     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1937         $opt = lc($1);
1938         $value = $2 ? lc($3) : '';
1939     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1940         $opt = lc($1);
1941         $value = int($2);
1942     } else {
1943         chomp $line;
1944         die "can't parse option '$line'\n"
1945     }
1946
1947     return ($opt, $value);
1948 }
1949
1950 sub parse_clusterfw_option {
1951     my ($line) = @_;
1952
1953     my ($opt, $value);
1954
1955     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1956         $opt = lc($1);
1957         $value = int($2);
1958     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1959         $opt = lc($1);
1960         $value = uc($3);
1961     } else {
1962         chomp $line;
1963         die "can't parse option '$line'\n"
1964     }
1965
1966     return ($opt, $value);
1967 }
1968
1969 sub parse_clusterfw_alias {
1970     my ($line) = @_;
1971
1972     # we can add single line comments to the end of the line
1973     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1974
1975     if ($line =~ m/^(\S+)\s(\S+)$/) {
1976         my ($name, $cidr) = ($1, $2);
1977         $cidr =~ s|/32$||;
1978         pve_verify_ipv4_or_cidr($cidr);
1979         my $data = {
1980             name => $name,
1981             cidr => $cidr,
1982         };
1983         $data->{comment} = $comment  if $comment;
1984         return $data;
1985     }
1986
1987     return undef;
1988 }
1989
1990 sub parse_vm_fw_rules {
1991     my ($filename, $fh) = @_;
1992
1993     my $res = { rules => [], options => {}};
1994
1995     my $section;
1996
1997     while (defined(my $line = <$fh>)) {
1998         next if $line =~ m/^#/;
1999         next if $line =~ m/^\s*$/;
2000
2001         my $linenr = $fh->input_line_number();
2002         my $prefix = "$filename (line $linenr)";
2003
2004         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2005             $section = lc($1);
2006             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2007             next;
2008         }
2009         if (!$section) {
2010             warn "$prefix: skip line - no section";
2011             next;
2012         }
2013
2014         next if !$res->{$section}; # skip undefined section
2015
2016         if ($section eq 'options') {
2017             eval {
2018                 my ($opt, $value) = parse_vmfw_option($line);
2019                 $res->{options}->{$opt} = $value;
2020             };
2021             warn "$prefix: $@" if $@;
2022             next;
2023         }
2024
2025         my $rule;
2026         eval { $rule = parse_fw_rule($line, 1, 1); };
2027         if (my $err = $@) {
2028             warn "$prefix: $err";
2029             next;
2030         }
2031
2032         push @{$res->{$section}}, $rule;
2033     }
2034
2035     return $res;
2036 }
2037
2038 sub parse_host_fw_rules {
2039     my ($filename, $fh) = @_;
2040
2041     my $res = { rules => [], options => {}};
2042
2043     my $section;
2044
2045     while (defined(my $line = <$fh>)) {
2046         next if $line =~ m/^#/;
2047         next if $line =~ m/^\s*$/;
2048
2049         my $linenr = $fh->input_line_number();
2050         my $prefix = "$filename (line $linenr)";
2051
2052         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2053             $section = lc($1);
2054             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2055             next;
2056         }
2057         if (!$section) {
2058             warn "$prefix: skip line - no section";
2059             next;
2060         }
2061
2062         next if !$res->{$section}; # skip undefined section
2063
2064         if ($section eq 'options') {
2065             eval {
2066                 my ($opt, $value) = parse_hostfw_option($line);
2067                 $res->{options}->{$opt} = $value;
2068             };
2069             warn "$prefix: $@" if $@;
2070             next;
2071         }
2072
2073         my $rule;
2074         eval { $rule = parse_fw_rule($line, 1, 1); };
2075         if (my $err = $@) {
2076             warn "$prefix: $err";
2077             next;
2078         }
2079
2080         push @{$res->{$section}}, $rule;
2081     }
2082
2083     return $res;
2084 }
2085
2086 sub parse_cluster_fw_rules {
2087     my ($filename, $fh) = @_;
2088
2089     my $section;
2090     my $group;
2091
2092     my $res = {
2093         rules => [],
2094         options => {},
2095         aliases => {},
2096         groups => {},
2097         group_comments => {},
2098         ipset => {} ,
2099         ipset_comments => {},
2100     };
2101
2102     while (defined(my $line = <$fh>)) {
2103         next if $line =~ m/^#/;
2104         next if $line =~ m/^\s*$/;
2105
2106         my $linenr = $fh->input_line_number();
2107         my $prefix = "$filename (line $linenr)";
2108
2109         if ($line =~ m/^\[options\]$/i) {
2110             $section = 'options';
2111             next;
2112         }
2113
2114         if ($line =~ m/^\[aliases\]$/i) {
2115             $section = 'aliases';
2116             next;
2117         }
2118
2119         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2120             $section = 'groups';
2121             $group = lc($1);
2122             my $comment = $2;
2123             $res->{$section}->{$group} = [];
2124             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2125                 if $comment;
2126             next;
2127         }
2128
2129         if ($line =~ m/^\[rules\]$/i) {
2130             $section = 'rules';
2131             next;
2132         }
2133
2134         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2135             $section = 'ipset';
2136             $group = lc($1);
2137             my $comment = $2;
2138             $res->{$section}->{$group} = [];
2139             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2140                 if $comment;
2141             next;
2142         }
2143
2144         if (!$section) {
2145             warn "$prefix: skip line - no section\n";
2146             next;
2147         }
2148
2149         if ($section eq 'options') {
2150             eval {
2151                 my ($opt, $value) = parse_clusterfw_option($line);
2152                 $res->{options}->{$opt} = $value;
2153             };
2154             warn "$prefix: $@" if $@;
2155         } elsif ($section eq 'aliases') {
2156             eval {
2157                 my $data = parse_clusterfw_alias($line);
2158                 $res->{aliases}->{lc($data->{name})} = $data;
2159             };
2160             warn "$prefix: $@" if $@;
2161         } elsif ($section eq 'rules') {
2162             my $rule;
2163             eval { $rule = parse_fw_rule($line, 1, 1); };
2164             if (my $err = $@) {
2165                 warn "$prefix: $err";
2166                 next;
2167             }
2168             push @{$res->{$section}}, $rule;
2169         } elsif ($section eq 'groups') {
2170             my $rule;
2171             eval { $rule = parse_fw_rule($line, 0, 0); };
2172             if (my $err = $@) {
2173                 warn "$prefix: $err";
2174                 next;
2175             }
2176             push @{$res->{$section}->{$group}}, $rule;
2177         } elsif ($section eq 'ipset') {
2178             # we can add single line comments to the end of the rule
2179             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2180
2181             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2182             my $nomatch = $1;
2183             my $cidr = $2;
2184
2185             if($cidr !~ m/^${ip_alias_pattern}$/) {
2186                 $cidr =~ s|/32$||;
2187
2188                 eval { pve_verify_ipv4_or_cidr($cidr); };
2189                 if (my $err = $@) {
2190                     warn "$prefix: $cidr - $err";
2191                     next;
2192                 }
2193             }
2194
2195             my $entry = { cidr => $cidr };
2196             $entry->{nomatch} = 1 if $nomatch;
2197             $entry->{comment} = $comment if $comment;
2198
2199             push @{$res->{$section}->{$group}}, $entry;
2200         }
2201     }
2202
2203     return $res;
2204 }
2205
2206 sub run_locked {
2207     my ($code, @param) = @_;
2208
2209     my $timeout = 10;
2210
2211     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2212
2213     die $@ if $@;
2214
2215     return $res;
2216 }
2217
2218 sub read_local_vm_config {
2219
2220     my $openvz = {};
2221     my $qemu = {};
2222
2223     my $vmdata = { openvz => $openvz, qemu => $qemu };
2224
2225     my $vmlist = PVE::Cluster::get_vmlist();
2226     return $vmdata if !$vmlist || !$vmlist->{ids};
2227     my $ids = $vmlist->{ids};
2228
2229     foreach my $vmid (keys %$ids) {
2230         next if !$vmid; # skip VE0
2231         my $d = $ids->{$vmid};
2232         next if !$d->{node} || $d->{node} ne $nodename;
2233         next if !$d->{type};
2234         if ($d->{type} eq 'openvz') {
2235             if ($have_pve_manager) {
2236                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2237                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2238                     $openvz->{$vmid} = $conf;
2239                 }
2240             }
2241         } elsif ($d->{type} eq 'qemu') {
2242             if ($have_qemu_server) {
2243                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2244                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2245                     $qemu->{$vmid} = $conf;
2246                 }
2247             }
2248         }
2249     }
2250
2251     return $vmdata;
2252 };
2253
2254 sub load_vmfw_conf {
2255     my ($vmid, $dir) = @_;
2256
2257     my $vmfw_conf = {};
2258
2259     $dir = "/etc/pve/firewall" if !defined($dir);
2260
2261     my $filename = "$dir/$vmid.fw";
2262     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2263         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2264     }
2265
2266     return $vmfw_conf;
2267 }
2268
2269 my $format_rules = sub {
2270     my ($rules, $allow_iface) = @_;
2271
2272     my $raw = '';
2273
2274     foreach my $rule (@$rules) {
2275         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2276             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2277             $raw .= uc($rule->{type});
2278             if ($rule->{macro}) {
2279                 $raw .= " $rule->{macro}($rule->{action})";
2280             } else {
2281                 $raw .= " " . $rule->{action};
2282             }
2283             if ($allow_iface && $rule->{iface}) {
2284                 $raw .= " -i $rule->{iface}";
2285             }
2286
2287             if ($rule->{type} ne  'group')  {
2288                 $raw .= " -source $rule->{source}" if $rule->{source};
2289                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2290                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2291                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2292                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2293             }
2294
2295             $raw .= " # " . encode('utf8', $rule->{comment})
2296                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2297             $raw .= "\n";
2298         } else {
2299             die "unknown rule type '$rule->{type}'";
2300         }
2301     }
2302
2303     return $raw;
2304 };
2305
2306 my $format_options = sub {
2307     my ($options) = @_;
2308
2309     my $raw = '';
2310
2311     $raw .= "[OPTIONS]\n\n";
2312     foreach my $opt (keys %$options) {
2313         $raw .= "$opt: $options->{$opt}\n";
2314     }
2315     $raw .= "\n";
2316
2317     return $raw;
2318 };
2319
2320 my $format_aliases = sub {
2321     my ($aliases) = @_;
2322
2323     my $raw = '';
2324
2325     $raw .= "[ALIASES]\n\n";
2326     foreach my $k (keys %$aliases) {
2327         my $e = $aliases->{$k};
2328         $raw .= "$e->{name} $e->{cidr}";
2329         $raw .= " # " . encode('utf8', $e->{comment})
2330             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2331         $raw .= "\n";
2332     }
2333     $raw .= "\n";
2334
2335     return $raw;
2336 };
2337
2338 my $format_ipset = sub {
2339     my ($options) = @_;
2340
2341     my $raw = '';
2342
2343     my $nethash = {};
2344     foreach my $entry (@$options) {
2345         $nethash->{$entry->{cidr}} = $entry;
2346     }
2347
2348     foreach my $cidr (sort keys %$nethash) {
2349         my $entry = $nethash->{$cidr};
2350         my $line = $entry->{nomatch} ? '!' : '';
2351         $line .= $entry->{cidr};
2352         $line .= " # " . encode('utf8', $entry->{comment})
2353             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2354         $raw .= "$line\n";
2355     }
2356
2357     return $raw;
2358 };
2359
2360 sub save_vmfw_conf {
2361     my ($vmid, $vmfw_conf) = @_;
2362
2363     my $raw = '';
2364
2365     my $options = $vmfw_conf->{options};
2366     $raw .= &$format_options($options) if scalar(keys %$options);
2367
2368     my $rules = $vmfw_conf->{rules} || [];
2369     if (scalar(@$rules)) {
2370         $raw .= "[RULES]\n\n";
2371         $raw .= &$format_rules($rules, 1);
2372         $raw .= "\n";
2373     }
2374
2375     my $filename = "/etc/pve/firewall/$vmid.fw";
2376     PVE::Tools::file_set_contents($filename, $raw);
2377 }
2378
2379 sub read_vm_firewall_configs {
2380     my ($vmdata, $dir) = @_;
2381
2382     my $vmfw_configs = {};
2383
2384     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2385         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2386         next if !$vmfw_conf->{options}; # skip if file does not exists
2387         $vmfw_configs->{$vmid} = $vmfw_conf;
2388     }
2389
2390     return $vmfw_configs;
2391 }
2392
2393 sub get_option_log_level {
2394     my ($options, $k) = @_;
2395
2396     my $v = $options->{$k};
2397     $v = $default_log_level if !defined($v);
2398
2399     return undef if $v eq '' || $v eq 'nolog';
2400
2401     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2402
2403     return $v if ($v >= 0) && ($v <= 7);
2404
2405     warn "unknown log level ($k = '$v')\n";
2406
2407     return undef;
2408 }
2409
2410 sub generate_std_chains {
2411     my ($ruleset, $options) = @_;
2412
2413     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2414
2415     # same as shorewall smurflog.
2416     my $chain = 'PVEFW-smurflog';
2417     $pve_std_chains->{$chain} = [];
2418
2419     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2420     push @{$pve_std_chains->{$chain}}, "-j DROP";
2421
2422     # same as shorewall logflags action.
2423     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2424     $chain = 'PVEFW-logflags';
2425     $pve_std_chains->{$chain} = [];
2426
2427     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2428     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2429     push @{$pve_std_chains->{$chain}}, "-j DROP";
2430
2431     foreach my $chain (keys %$pve_std_chains) {
2432         ruleset_create_chain($ruleset, $chain);
2433         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2434             if (ref($rule)) {
2435                 ruleset_generate_rule($ruleset, $chain, $rule);
2436             } else {
2437                 ruleset_addrule($ruleset, $chain, $rule);
2438             }
2439         }
2440     }
2441 }
2442
2443 sub generate_ipset_chains {
2444     my ($ipset_ruleset, $fw_conf) = @_;
2445
2446     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2447         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2448     }
2449 }
2450
2451 sub generate_ipset {
2452     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2453
2454     my $hashsize = scalar(@$options);
2455     if ($hashsize <= 64) {
2456         $hashsize = 64;
2457     } else {
2458         $hashsize = round_powerof2($hashsize);
2459     }
2460
2461     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2462
2463     # remove duplicates
2464     my $nethash = {};
2465     foreach my $entry (@$options) {
2466         my $cidr = $entry->{cidr};
2467         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2468             my $alias = lc($cidr);
2469             if ($aliases->{$alias}) {
2470                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2471                 $nethash->{$entry->{cidr}} = $entry;
2472             } else {
2473                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2474             }
2475         } else {
2476             $nethash->{$entry->{cidr}} = $entry;
2477         }
2478     }
2479
2480     foreach my $cidr (sort keys %$nethash) {
2481         my $entry = $nethash->{$cidr};
2482
2483         my $cmd = "add $name $cidr";
2484         if ($entry->{nomatch}) {
2485             if ($feature_ipset_nomatch) {
2486                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2487             } else {
2488                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2489             }
2490         } else {
2491             push @{$ipset_ruleset->{$name}}, $cmd;
2492         }
2493     }
2494 }
2495
2496 sub round_powerof2 {
2497     my ($int) = @_;
2498
2499     $int--;
2500     $int |= $int >> $_ foreach (1,2,4,8,16);
2501     return ++$int;
2502 }
2503
2504 sub load_clusterfw_conf {
2505     my ($filename) = @_;
2506
2507     $filename = $clusterfw_conf_filename if !defined($filename);
2508
2509     my $cluster_conf = {};
2510     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2511         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2512     }
2513
2514     return $cluster_conf;
2515 }
2516
2517 sub save_clusterfw_conf {
2518     my ($cluster_conf) = @_;
2519
2520     my $raw = '';
2521
2522     my $options = $cluster_conf->{options};
2523     $raw .= &$format_options($options) if scalar(keys %$options);
2524
2525     my $aliases = $cluster_conf->{aliases};
2526     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2527
2528     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2529         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2530             my $utf8comment = encode('utf8', $comment);
2531             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2532         } else {
2533             $raw .= "[IPSET $ipset]\n\n";
2534         }
2535         my $options = $cluster_conf->{ipset}->{$ipset};
2536         $raw .= &$format_ipset($options);
2537         $raw .= "\n";
2538     }
2539
2540     my $rules = $cluster_conf->{rules};
2541     if (scalar(@$rules)) {
2542         $raw .= "[RULES]\n\n";
2543         $raw .= &$format_rules($rules, 1);
2544         $raw .= "\n";
2545     }
2546
2547     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2548         my $rules = $cluster_conf->{groups}->{$group};
2549         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2550             my $utf8comment = encode('utf8', $comment);
2551             $raw .= "[group $group] # $utf8comment\n\n";
2552         } else {
2553             $raw .= "[group $group]\n\n";
2554         }
2555
2556         $raw .= &$format_rules($rules, 0);
2557         $raw .= "\n";
2558     }
2559
2560     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2561 }
2562
2563 sub load_hostfw_conf {
2564     my ($filename) = @_;
2565
2566     $filename = $hostfw_conf_filename if !defined($filename);
2567
2568     my $hostfw_conf = {};
2569     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2570         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2571     }
2572     return $hostfw_conf;
2573 }
2574
2575 sub save_hostfw_conf {
2576     my ($hostfw_conf) = @_;
2577
2578     my $raw = '';
2579
2580     my $options = $hostfw_conf->{options};
2581     $raw .= &$format_options($options) if scalar(keys %$options);
2582
2583     my $rules = $hostfw_conf->{rules};
2584     if (scalar(@$rules)) {
2585         $raw .= "[RULES]\n\n";
2586         $raw .= &$format_rules($rules, 1);
2587         $raw .= "\n";
2588     }
2589
2590     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2591 }
2592
2593 sub compile {
2594     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2595
2596     my $vmfw_configs;
2597
2598     if ($vmdata) { # test mode
2599         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2600         my $filename = "$testdir/cluster.fw";
2601         die "missing test file '$filename'\n" if ! -f $filename;
2602         $cluster_conf = load_clusterfw_conf($filename);
2603
2604         $filename = "$testdir/host.fw";
2605         die "missing test file '$filename'\n" if ! -f $filename;
2606         $hostfw_conf = load_hostfw_conf($filename);
2607
2608         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2609     } else { # normal operation
2610         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2611
2612         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2613
2614         $vmdata = read_local_vm_config();
2615         $vmfw_configs = read_vm_firewall_configs($vmdata);
2616     }
2617
2618
2619     $cluster_conf->{ipset}->{venet0} = [];
2620
2621     my $ruleset = {};
2622
2623     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2624     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2625
2626     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2627
2628     my $hostfw_options = $hostfw_conf->{options} || {};
2629
2630     # fixme: what log level should we use here?
2631     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2632
2633     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2634
2635     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2636     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2637     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2638
2639     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2640     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2641
2642     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2643
2644     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2645     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2646
2647     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2648     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2649
2650     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2651
2652     generate_std_chains($ruleset, $hostfw_options);
2653
2654     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2655
2656     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2657
2658     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2659
2660     # generate firewall rules for QEMU VMs
2661     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2662         my $conf = $vmdata->{qemu}->{$vmid};
2663         my $vmfw_conf = $vmfw_configs->{$vmid};
2664         next if !$vmfw_conf;
2665         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2666
2667         foreach my $netid (keys %$conf) {
2668             next if $netid !~ m/^net(\d+)$/;
2669             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2670             next if !$net->{firewall};
2671             my $iface = "tap${vmid}i$1";
2672
2673             my $macaddr = $net->{macaddr};
2674             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2675                                          $vmfw_conf, $vmid, 'IN');
2676             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2677                                          $vmfw_conf, $vmid, 'OUT');
2678         }
2679     }
2680
2681     # generate firewall rules for OpenVZ containers
2682     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2683         my $conf = $vmdata->{openvz}->{$vmid};
2684
2685         my $vmfw_conf = $vmfw_configs->{$vmid};
2686         next if !$vmfw_conf;
2687         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2688
2689         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2690             my $ip = $conf->{ip_address}->{value};
2691             $ip =~ s/\s+/,/g;
2692             parse_address_list($ip); # make sure we have a valid $ip list
2693
2694             my @ips = split(',', $ip);
2695
2696             foreach my $singleip (@ips) {
2697                 my $venet0ipset = {};
2698                 $venet0ipset->{cidr} = $singleip;
2699                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2700             }
2701
2702             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2703             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2704         }
2705
2706         if ($conf->{netif} && $conf->{netif}->{value}) {
2707             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2708             foreach my $netid (keys %$netif) {
2709                 my $d = $netif->{$netid};
2710
2711                 my $macaddr = $d->{mac};
2712                 my $iface = $d->{host_ifname};
2713                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2714                                              $vmfw_conf, $vmid, 'IN');
2715                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2716                                              $vmfw_conf, $vmid, 'OUT');
2717             }
2718         }
2719     }
2720
2721     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2722         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2723     }
2724
2725     my $ipset_ruleset = {};
2726     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2727
2728     return ($ruleset, $ipset_ruleset);
2729 }
2730
2731 sub get_ruleset_status {
2732     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2733
2734     my $statushash = {};
2735
2736     foreach my $chain (sort keys %$ruleset) {
2737         my $sig = &$digest_fn($ruleset->{$chain});
2738
2739         $statushash->{$chain}->{sig} = $sig;
2740
2741         my $oldsig = $active_chains->{$chain};
2742         if (!defined($oldsig)) {
2743             $statushash->{$chain}->{action} = 'create';
2744         } else {
2745             if ($oldsig eq $sig) {
2746                 $statushash->{$chain}->{action} = 'exists';
2747             } else {
2748                 $statushash->{$chain}->{action} = 'update';
2749             }
2750         }
2751         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2752         foreach my $cmd (@{$ruleset->{$chain}}) {
2753             print "\t$cmd\n" if $verbose;
2754         }
2755     }
2756
2757     foreach my $chain (sort keys %$active_chains) {
2758         if (!defined($ruleset->{$chain})) {
2759             my $sig = $active_chains->{$chain};
2760             $statushash->{$chain}->{action} = 'delete';
2761             $statushash->{$chain}->{sig} = $sig;
2762             print "delete $chain ($sig)\n" if $verbose;
2763         }
2764     }
2765
2766     return $statushash;
2767 }
2768
2769 sub print_sig_rule {
2770     my ($chain, $sig) = @_;
2771
2772     # We just use this to store a SHA1 checksum used to detect changes
2773     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2774 }
2775
2776 sub get_ruleset_cmdlist {
2777     my ($ruleset, $verbose) = @_;
2778
2779     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2780
2781     my ($active_chains, $hooks) = iptables_get_chains();
2782     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2783
2784     # create missing chains first
2785     foreach my $chain (sort keys %$ruleset) {
2786         my $stat = $statushash->{$chain};
2787         die "internal error" if !$stat;
2788         next if $stat->{action} ne 'create';
2789
2790         $cmdlist .= ":$chain - [0:0]\n";
2791     }
2792
2793     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2794         if (!$hooks->{$h}) {
2795             $cmdlist .= "-A $h -j PVEFW-$h\n";
2796         }
2797     }
2798
2799     foreach my $chain (sort keys %$ruleset) {
2800         my $stat = $statushash->{$chain};
2801         die "internal error" if !$stat;
2802
2803         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2804             $cmdlist .= "-F $chain\n";
2805             foreach my $cmd (@{$ruleset->{$chain}}) {
2806                 $cmdlist .= "$cmd\n";
2807             }
2808             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2809         } elsif ($stat->{action} eq 'delete') {
2810             die "internal error"; # this should not happen
2811         } elsif ($stat->{action} eq 'exists') {
2812             # do nothing
2813         } else {
2814             die "internal error - unknown status '$stat->{action}'";
2815         }
2816     }
2817
2818     foreach my $chain (keys %$statushash) {
2819         next if $statushash->{$chain}->{action} ne 'delete';
2820         $cmdlist .= "-F $chain\n";
2821     }
2822     foreach my $chain (keys %$statushash) {
2823         next if $statushash->{$chain}->{action} ne 'delete';
2824         next if $chain eq 'PVEFW-INPUT';
2825         next if $chain eq 'PVEFW-OUTPUT';
2826         next if $chain eq 'PVEFW-FORWARD';
2827         $cmdlist .= "-X $chain\n";
2828     }
2829
2830     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2831
2832     $cmdlist .= "COMMIT\n";
2833
2834     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2835 }
2836
2837 sub get_ipset_cmdlist {
2838     my ($ruleset, $verbose) = @_;
2839
2840     my $cmdlist = "";
2841
2842     my $delete_cmdlist = "";
2843
2844     my $active_chains = ipset_get_chains();
2845     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2846
2847     # remove stale _swap chains
2848     foreach my $chain (keys %$active_chains) {
2849         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2850             $cmdlist .= "destroy $chain\n";
2851         }
2852     }
2853
2854     foreach my $chain (sort keys %$ruleset) {
2855         my $stat = $statushash->{$chain};
2856         die "internal error" if !$stat;
2857
2858         if ($stat->{action} eq 'create') {
2859             foreach my $cmd (@{$ruleset->{$chain}}) {
2860                 $cmdlist .= "$cmd\n";
2861             }
2862         }
2863
2864         if ($stat->{action} eq 'update') {
2865             my $chain_swap = $chain."_swap";
2866
2867             foreach my $cmd (@{$ruleset->{$chain}}) {
2868                 $cmd =~ s/$chain/$chain_swap/;
2869                 $cmdlist .= "$cmd\n";
2870             }
2871             $cmdlist .= "swap $chain_swap $chain\n";
2872             $cmdlist .= "flush $chain_swap\n";
2873             $cmdlist .= "destroy $chain_swap\n";
2874         }
2875
2876     }
2877
2878     foreach my $chain (keys %$statushash) {
2879         next if $statushash->{$chain}->{action} ne 'delete';
2880
2881         $delete_cmdlist .= "flush $chain\n";
2882         $delete_cmdlist .= "destroy $chain\n";
2883     }
2884
2885     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2886
2887     return ($cmdlist, $delete_cmdlist, $changes);
2888 }
2889
2890 sub apply_ruleset {
2891     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2892
2893     enable_bridge_firewall();
2894
2895     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2896         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2897
2898     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2899
2900     if ($verbose) {
2901         if ($ipset_changes) {
2902             print "ipset changes:\n";
2903             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2904             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2905         }
2906
2907         if ($changes) {
2908             print "iptables changes:\n";
2909             print $cmdlist;
2910         }
2911     }
2912
2913     ipset_restore_cmdlist($ipset_create_cmdlist);
2914
2915     iptables_restore_cmdlist($cmdlist);
2916
2917     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2918
2919     # test: re-read status and check if everything is up to date
2920     my $active_chains = iptables_get_chains();
2921     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2922
2923     my $errors;
2924     foreach my $chain (sort keys %$ruleset) {
2925         my $stat = $statushash->{$chain};
2926         if ($stat->{action} ne 'exists') {
2927             warn "unable to update chain '$chain'\n";
2928             $errors = 1;
2929         }
2930     }
2931
2932     die "unable to apply firewall changes\n" if $errors;
2933
2934     update_nf_conntrack_max($hostfw_conf);
2935
2936     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2937
2938 }
2939
2940 sub update_nf_conntrack_max {
2941     my ($hostfw_conf) = @_;
2942
2943     my $max = 65536; # reasonable default
2944
2945     my $options = $hostfw_conf->{options} || {};
2946
2947     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2948         $max = $options->{nf_conntrack_max};
2949         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2950     }
2951
2952     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2953     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2954
2955     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2956
2957     if ($current != $max) {
2958         my $hashsize = int($max/4);
2959         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2960         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2961     }
2962 }
2963
2964 sub update_nf_conntrack_tcp_timeout_established {
2965     my ($hostfw_conf) = @_;
2966
2967     my $options = $hostfw_conf->{options} || {};
2968
2969     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2970
2971     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2972 }
2973
2974 sub remove_pvefw_chains {
2975
2976     my ($chash, $hooks) = iptables_get_chains();
2977     my $cmdlist = "*filter\n";
2978
2979     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2980         if ($hooks->{$h}) {
2981             $cmdlist .= "-D $h -j PVEFW-$h\n";
2982         }
2983     }
2984
2985     foreach my $chain (keys %$chash) {
2986         $cmdlist .= "-F $chain\n";
2987     }
2988
2989     foreach my $chain (keys %$chash) {
2990         $cmdlist .= "-X $chain\n";
2991     }
2992     $cmdlist .= "COMMIT\n";
2993
2994     iptables_restore_cmdlist($cmdlist);
2995 }
2996
2997 sub init {
2998     my $cluster_conf = load_clusterfw_conf();
2999     my $cluster_options = $cluster_conf->{options};
3000     my $enable = $cluster_options->{enable};
3001
3002     return if !$enable;
3003
3004     # load required modules here
3005 }
3006
3007 sub update {
3008     my ($verbose) = @_;
3009
3010     my $code = sub {
3011
3012         my $cluster_conf = load_clusterfw_conf();
3013         my $cluster_options = $cluster_conf->{options};
3014
3015         my $enable = $cluster_options->{enable};
3016
3017         die "Firewall is disabled - cannot start\n" if !$enable;
3018
3019         if (!$enable) {
3020             PVE::Firewall::remove_pvefw_chains();
3021             print "Firewall disabled\n" if $verbose;
3022             return;
3023         }
3024
3025         my $hostfw_conf = load_hostfw_conf();
3026
3027         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3028
3029         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
3030     };
3031
3032     run_locked($code);
3033 }
3034
3035 1;