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     my $clusternet = get_cluster_network();
1688
1689     if ($clusternet) {
1690         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 8006 -j ACCEPT");  # PVE API
1691         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 5900:5999 -j ACCEPT");  # PVE VNC Console
1692         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 3128 -j ACCEPT");  # SPICE Proxy
1693         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 22 -j ACCEPT");  # SSH
1694
1695         # corosync
1696         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT"
1697         ruleset_addrule($ruleset, $chain, "-s $clusternet -d $clusternet $corosync_rule");
1698         ruleset_addrule($ruleset, $chain, "-s $clusternet -m addrtype --dst-type MULTICAST $corosync_rule");
1699     }
1700
1701     # we use RETURN because we need to check also tap rules
1702     my $accept_action = 'RETURN';
1703
1704     # add host rules first, so that cluster wide rules can be overwritten
1705     foreach my $rule (@$rules, @$cluster_rules) {
1706         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1707         if ($rule->{type} eq 'group') {
1708             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1709         } elsif ($rule->{type} eq 'in') {
1710             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1711                                   undef, $cluster_conf);
1712         }
1713         delete $rule->{iface_in};
1714     }
1715
1716     # implement input policy
1717     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1718     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1719
1720     # host outbound firewall
1721     $chain = "PVEFW-HOST-OUT";
1722     ruleset_create_chain($ruleset, $chain);
1723
1724     $loglevel = get_option_log_level($options, "log_level_out");
1725
1726     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1727
1728     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1729
1730     if ($clusternet) {
1731         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT";
1732         ruleset_addrule($ruleset, $chain, "-s $clusternet -d $clusternet $corosync_rule");
1733         ruleset_addrule($ruleset, $chain, "-s $clusternet -m addrtype --dst-type MULTICAST $corosync_rule");
1734     }
1735
1736     # we use RETURN because we may want to check other thigs later
1737     $accept_action = 'RETURN';
1738
1739     # add host rules first, so that cluster wide rules can be overwritten
1740     foreach my $rule (@$rules, @$cluster_rules) {
1741         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1742         if ($rule->{type} eq 'group') {
1743             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1744         } elsif ($rule->{type} eq 'out') {
1745             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1746                                   undef, $cluster_conf);
1747         }
1748         delete $rule->{iface_out};
1749     }
1750
1751     # implement output policy
1752     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1753     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1754
1755     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1756     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1757 }
1758
1759 sub generate_group_rules {
1760     my ($ruleset, $cluster_conf, $group) = @_;
1761
1762     my $rules = $cluster_conf->{groups}->{$group};
1763
1764     if (!$rules) {
1765         warn "no such security group '$group'\n";
1766         $rules = []; # create empty chain
1767     }
1768
1769     my $chain = "GROUP-${group}-IN";
1770
1771     ruleset_create_chain($ruleset, $chain);
1772     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1773
1774     foreach my $rule (@$rules) {
1775         next if $rule->{type} ne 'in';
1776         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1777     }
1778
1779     $chain = "GROUP-${group}-OUT";
1780
1781     ruleset_create_chain($ruleset, $chain);
1782     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1783
1784     foreach my $rule (@$rules) {
1785         next if $rule->{type} ne 'out';
1786         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1787         # check also other tap rules later
1788         ruleset_generate_rule($ruleset, $chain, $rule,
1789                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1790     }
1791 }
1792
1793 my $MAX_NETS = 32;
1794 my $valid_netdev_names = {};
1795 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1796     $valid_netdev_names->{"net$i"} = 1;
1797 }
1798
1799 sub parse_fw_rule {
1800     my ($line, $allow_iface, $allow_groups) = @_;
1801
1802     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1803
1804     chomp $line;
1805
1806     # we can add single line comments to the end of the rule
1807     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1808
1809     # we can disable a rule when prefixed with '|'
1810     my $enable = 1;
1811
1812     $enable = 0 if $line =~ s/^\|//;
1813
1814     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1815         die "unable to parse rule: $line\n";
1816
1817     $type = lc($1);
1818     $action = $2;
1819
1820     if ($type eq  'in' || $type eq 'out') {
1821         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1822             # OK
1823         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1824             $action = $2;
1825             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1826             die "unknown macro '$1'\n" if !$preferred_name;
1827             $macro = $preferred_name;
1828         } else {
1829             die "unknown action '$action'\n";
1830         }
1831     } elsif ($type eq 'group') {
1832         die "groups disabled\n" if !$allow_groups;
1833         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1834     } else {
1835         die "unknown rule type '$type'\n";
1836     }
1837
1838     while (length($line)) {
1839         if ($line =~ s/^-i (\S+)\s*//) {
1840             die "parameter -i not allowed\n" if !$allow_iface;
1841             $iface = $1;
1842             PVE::JSONSchema::pve_verify_iface($iface);
1843             next;
1844         }
1845
1846         last if $type eq 'group';
1847
1848         if ($line =~ s/^-p (\S+)\s*//) {
1849             $proto = $1;
1850             pve_fw_verify_protocol_spec($proto);
1851             next;
1852         }
1853         if ($line =~ s/^-dport (\S+)\s*//) {
1854             $dport = $1;
1855             parse_port_name_number_or_range($dport);
1856             next;
1857         }
1858         if ($line =~ s/^-sport (\S+)\s*//) {
1859             $sport = $1;
1860             parse_port_name_number_or_range($sport);
1861             next;
1862         }
1863         if ($line =~ s/^-source (\S+)\s*//) {
1864             $source = $1;
1865             parse_address_list($source);
1866             next;
1867         }
1868         if ($line =~ s/^-dest (\S+)\s*//) {
1869             $dest = $1;
1870             parse_address_list($dest);
1871             next;
1872         }
1873
1874         last;
1875     }
1876
1877     die "unable to parse rule parameters: $line\n" if length($line);
1878
1879     return {
1880         type => $type,
1881         enable => $enable,
1882         comment => $comment,
1883         action => $action,
1884         macro => $macro,
1885         iface => $iface,
1886         source => $source,
1887         dest => $dest,
1888         proto => $proto,
1889         dport => $dport,
1890         sport => $sport,
1891     };
1892 }
1893
1894 sub parse_vmfw_option {
1895     my ($line) = @_;
1896
1897     my ($opt, $value);
1898
1899     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1900
1901     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1902         $opt = lc($1);
1903         $value = int($2);
1904     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1905         $opt = lc($1);
1906         $value = $2 ? lc($3) : '';
1907     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1908         $opt = lc($1);
1909         $value = uc($3);
1910     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1911         $opt = lc($1);
1912         $value = $2;
1913     } else {
1914         chomp $line;
1915         die "can't parse option '$line'\n"
1916     }
1917
1918     return ($opt, $value);
1919 }
1920
1921 sub parse_hostfw_option {
1922     my ($line) = @_;
1923
1924     my ($opt, $value);
1925
1926     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1927
1928     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1929         $opt = lc($1);
1930         $value = int($2);
1931     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1932         $opt = lc($1);
1933         $value = $2 ? lc($3) : '';
1934     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1935         $opt = lc($1);
1936         $value = int($2);
1937     } else {
1938         chomp $line;
1939         die "can't parse option '$line'\n"
1940     }
1941
1942     return ($opt, $value);
1943 }
1944
1945 sub parse_clusterfw_option {
1946     my ($line) = @_;
1947
1948     my ($opt, $value);
1949
1950     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1951         $opt = lc($1);
1952         $value = int($2);
1953     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1954         $opt = lc($1);
1955         $value = uc($3);
1956     } else {
1957         chomp $line;
1958         die "can't parse option '$line'\n"
1959     }
1960
1961     return ($opt, $value);
1962 }
1963
1964 sub parse_clusterfw_alias {
1965     my ($line) = @_;
1966
1967     # we can add single line comments to the end of the line
1968     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1969
1970     if ($line =~ m/^(\S+)\s(\S+)$/) {
1971         my ($name, $cidr) = ($1, $2);
1972         $cidr =~ s|/32$||;
1973         pve_verify_ipv4_or_cidr($cidr);
1974         my $data = {
1975             name => $name,
1976             cidr => $cidr,
1977         };
1978         $data->{comment} = $comment  if $comment;
1979         return $data;
1980     }
1981
1982     return undef;
1983 }
1984
1985 sub parse_vm_fw_rules {
1986     my ($filename, $fh) = @_;
1987
1988     my $res = { rules => [], options => {}};
1989
1990     my $section;
1991
1992     while (defined(my $line = <$fh>)) {
1993         next if $line =~ m/^#/;
1994         next if $line =~ m/^\s*$/;
1995
1996         my $linenr = $fh->input_line_number();
1997         my $prefix = "$filename (line $linenr)";
1998
1999         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2000             $section = lc($1);
2001             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2002             next;
2003         }
2004         if (!$section) {
2005             warn "$prefix: skip line - no section";
2006             next;
2007         }
2008
2009         next if !$res->{$section}; # skip undefined section
2010
2011         if ($section eq 'options') {
2012             eval {
2013                 my ($opt, $value) = parse_vmfw_option($line);
2014                 $res->{options}->{$opt} = $value;
2015             };
2016             warn "$prefix: $@" if $@;
2017             next;
2018         }
2019
2020         my $rule;
2021         eval { $rule = parse_fw_rule($line, 1, 1); };
2022         if (my $err = $@) {
2023             warn "$prefix: $err";
2024             next;
2025         }
2026
2027         push @{$res->{$section}}, $rule;
2028     }
2029
2030     return $res;
2031 }
2032
2033 sub parse_host_fw_rules {
2034     my ($filename, $fh) = @_;
2035
2036     my $res = { rules => [], options => {}};
2037
2038     my $section;
2039
2040     while (defined(my $line = <$fh>)) {
2041         next if $line =~ m/^#/;
2042         next if $line =~ m/^\s*$/;
2043
2044         my $linenr = $fh->input_line_number();
2045         my $prefix = "$filename (line $linenr)";
2046
2047         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2048             $section = lc($1);
2049             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2050             next;
2051         }
2052         if (!$section) {
2053             warn "$prefix: skip line - no section";
2054             next;
2055         }
2056
2057         next if !$res->{$section}; # skip undefined section
2058
2059         if ($section eq 'options') {
2060             eval {
2061                 my ($opt, $value) = parse_hostfw_option($line);
2062                 $res->{options}->{$opt} = $value;
2063             };
2064             warn "$prefix: $@" if $@;
2065             next;
2066         }
2067
2068         my $rule;
2069         eval { $rule = parse_fw_rule($line, 1, 1); };
2070         if (my $err = $@) {
2071             warn "$prefix: $err";
2072             next;
2073         }
2074
2075         push @{$res->{$section}}, $rule;
2076     }
2077
2078     return $res;
2079 }
2080
2081 sub parse_cluster_fw_rules {
2082     my ($filename, $fh) = @_;
2083
2084     my $section;
2085     my $group;
2086
2087     my $res = {
2088         rules => [],
2089         options => {},
2090         aliases => {},
2091         groups => {},
2092         group_comments => {},
2093         ipset => {} ,
2094         ipset_comments => {},
2095     };
2096
2097     while (defined(my $line = <$fh>)) {
2098         next if $line =~ m/^#/;
2099         next if $line =~ m/^\s*$/;
2100
2101         my $linenr = $fh->input_line_number();
2102         my $prefix = "$filename (line $linenr)";
2103
2104         if ($line =~ m/^\[options\]$/i) {
2105             $section = 'options';
2106             next;
2107         }
2108
2109         if ($line =~ m/^\[aliases\]$/i) {
2110             $section = 'aliases';
2111             next;
2112         }
2113
2114         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2115             $section = 'groups';
2116             $group = lc($1);
2117             my $comment = $2;
2118             $res->{$section}->{$group} = [];
2119             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2120                 if $comment;
2121             next;
2122         }
2123
2124         if ($line =~ m/^\[rules\]$/i) {
2125             $section = 'rules';
2126             next;
2127         }
2128
2129         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2130             $section = 'ipset';
2131             $group = lc($1);
2132             my $comment = $2;
2133             $res->{$section}->{$group} = [];
2134             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2135                 if $comment;
2136             next;
2137         }
2138
2139         if (!$section) {
2140             warn "$prefix: skip line - no section\n";
2141             next;
2142         }
2143
2144         if ($section eq 'options') {
2145             eval {
2146                 my ($opt, $value) = parse_clusterfw_option($line);
2147                 $res->{options}->{$opt} = $value;
2148             };
2149             warn "$prefix: $@" if $@;
2150         } elsif ($section eq 'aliases') {
2151             eval {
2152                 my $data = parse_clusterfw_alias($line);
2153                 $res->{aliases}->{lc($data->{name})} = $data;
2154             };
2155             warn "$prefix: $@" if $@;
2156         } elsif ($section eq 'rules') {
2157             my $rule;
2158             eval { $rule = parse_fw_rule($line, 1, 1); };
2159             if (my $err = $@) {
2160                 warn "$prefix: $err";
2161                 next;
2162             }
2163             push @{$res->{$section}}, $rule;
2164         } elsif ($section eq 'groups') {
2165             my $rule;
2166             eval { $rule = parse_fw_rule($line, 0, 0); };
2167             if (my $err = $@) {
2168                 warn "$prefix: $err";
2169                 next;
2170             }
2171             push @{$res->{$section}->{$group}}, $rule;
2172         } elsif ($section eq 'ipset') {
2173             # we can add single line comments to the end of the rule
2174             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2175
2176             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2177             my $nomatch = $1;
2178             my $cidr = $2;
2179
2180             if($cidr !~ m/^${ip_alias_pattern}$/) {
2181                 $cidr =~ s|/32$||;
2182
2183                 eval { pve_verify_ipv4_or_cidr($cidr); };
2184                 if (my $err = $@) {
2185                     warn "$prefix: $cidr - $err";
2186                     next;
2187                 }
2188             }
2189
2190             my $entry = { cidr => $cidr };
2191             $entry->{nomatch} = 1 if $nomatch;
2192             $entry->{comment} = $comment if $comment;
2193
2194             push @{$res->{$section}->{$group}}, $entry;
2195         }
2196     }
2197
2198     return $res;
2199 }
2200
2201 sub run_locked {
2202     my ($code, @param) = @_;
2203
2204     my $timeout = 10;
2205
2206     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2207
2208     die $@ if $@;
2209
2210     return $res;
2211 }
2212
2213 sub read_local_vm_config {
2214
2215     my $openvz = {};
2216     my $qemu = {};
2217
2218     my $vmdata = { openvz => $openvz, qemu => $qemu };
2219
2220     my $vmlist = PVE::Cluster::get_vmlist();
2221     return $vmdata if !$vmlist || !$vmlist->{ids};
2222     my $ids = $vmlist->{ids};
2223
2224     foreach my $vmid (keys %$ids) {
2225         next if !$vmid; # skip VE0
2226         my $d = $ids->{$vmid};
2227         next if !$d->{node} || $d->{node} ne $nodename;
2228         next if !$d->{type};
2229         if ($d->{type} eq 'openvz') {
2230             if ($have_pve_manager) {
2231                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2232                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2233                     $openvz->{$vmid} = $conf;
2234                 }
2235             }
2236         } elsif ($d->{type} eq 'qemu') {
2237             if ($have_qemu_server) {
2238                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2239                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2240                     $qemu->{$vmid} = $conf;
2241                 }
2242             }
2243         }
2244     }
2245
2246     return $vmdata;
2247 };
2248
2249 sub load_vmfw_conf {
2250     my ($vmid, $dir) = @_;
2251
2252     my $vmfw_conf = {};
2253
2254     $dir = "/etc/pve/firewall" if !defined($dir);
2255
2256     my $filename = "$dir/$vmid.fw";
2257     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2258         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2259     }
2260
2261     return $vmfw_conf;
2262 }
2263
2264 my $format_rules = sub {
2265     my ($rules, $allow_iface) = @_;
2266
2267     my $raw = '';
2268
2269     foreach my $rule (@$rules) {
2270         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2271             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2272             $raw .= uc($rule->{type});
2273             if ($rule->{macro}) {
2274                 $raw .= " $rule->{macro}($rule->{action})";
2275             } else {
2276                 $raw .= " " . $rule->{action};
2277             }
2278             if ($allow_iface && $rule->{iface}) {
2279                 $raw .= " -i $rule->{iface}";
2280             }
2281
2282             if ($rule->{type} ne  'group')  {
2283                 $raw .= " -source $rule->{source}" if $rule->{source};
2284                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2285                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2286                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2287                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2288             }
2289
2290             $raw .= " # " . encode('utf8', $rule->{comment})
2291                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2292             $raw .= "\n";
2293         } else {
2294             die "unknown rule type '$rule->{type}'";
2295         }
2296     }
2297
2298     return $raw;
2299 };
2300
2301 my $format_options = sub {
2302     my ($options) = @_;
2303
2304     my $raw = '';
2305
2306     $raw .= "[OPTIONS]\n\n";
2307     foreach my $opt (keys %$options) {
2308         $raw .= "$opt: $options->{$opt}\n";
2309     }
2310     $raw .= "\n";
2311
2312     return $raw;
2313 };
2314
2315 my $format_aliases = sub {
2316     my ($aliases) = @_;
2317
2318     my $raw = '';
2319
2320     $raw .= "[ALIASES]\n\n";
2321     foreach my $k (keys %$aliases) {
2322         my $e = $aliases->{$k};
2323         $raw .= "$e->{name} $e->{cidr}";
2324         $raw .= " # " . encode('utf8', $e->{comment})
2325             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2326         $raw .= "\n";
2327     }
2328     $raw .= "\n";
2329
2330     return $raw;
2331 };
2332
2333 my $format_ipset = sub {
2334     my ($options) = @_;
2335
2336     my $raw = '';
2337
2338     my $nethash = {};
2339     foreach my $entry (@$options) {
2340         $nethash->{$entry->{cidr}} = $entry;
2341     }
2342
2343     foreach my $cidr (sort keys %$nethash) {
2344         my $entry = $nethash->{$cidr};
2345         my $line = $entry->{nomatch} ? '!' : '';
2346         $line .= $entry->{cidr};
2347         $line .= " # " . encode('utf8', $entry->{comment})
2348             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2349         $raw .= "$line\n";
2350     }
2351
2352     return $raw;
2353 };
2354
2355 sub save_vmfw_conf {
2356     my ($vmid, $vmfw_conf) = @_;
2357
2358     my $raw = '';
2359
2360     my $options = $vmfw_conf->{options};
2361     $raw .= &$format_options($options) if scalar(keys %$options);
2362
2363     my $rules = $vmfw_conf->{rules} || [];
2364     if (scalar(@$rules)) {
2365         $raw .= "[RULES]\n\n";
2366         $raw .= &$format_rules($rules, 1);
2367         $raw .= "\n";
2368     }
2369
2370     my $filename = "/etc/pve/firewall/$vmid.fw";
2371     PVE::Tools::file_set_contents($filename, $raw);
2372 }
2373
2374 sub read_vm_firewall_configs {
2375     my ($vmdata, $dir) = @_;
2376
2377     my $vmfw_configs = {};
2378
2379     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2380         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2381         next if !$vmfw_conf->{options}; # skip if file does not exists
2382         $vmfw_configs->{$vmid} = $vmfw_conf;
2383     }
2384
2385     return $vmfw_configs;
2386 }
2387
2388 sub get_option_log_level {
2389     my ($options, $k) = @_;
2390
2391     my $v = $options->{$k};
2392     $v = $default_log_level if !defined($v);
2393
2394     return undef if $v eq '' || $v eq 'nolog';
2395
2396     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2397
2398     return $v if ($v >= 0) && ($v <= 7);
2399
2400     warn "unknown log level ($k = '$v')\n";
2401
2402     return undef;
2403 }
2404
2405 sub generate_std_chains {
2406     my ($ruleset, $options) = @_;
2407
2408     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2409
2410     # same as shorewall smurflog.
2411     my $chain = 'PVEFW-smurflog';
2412     $pve_std_chains->{$chain} = [];
2413
2414     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2415     push @{$pve_std_chains->{$chain}}, "-j DROP";
2416
2417     # same as shorewall logflags action.
2418     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2419     $chain = 'PVEFW-logflags';
2420     $pve_std_chains->{$chain} = [];
2421
2422     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2423     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2424     push @{$pve_std_chains->{$chain}}, "-j DROP";
2425
2426     foreach my $chain (keys %$pve_std_chains) {
2427         ruleset_create_chain($ruleset, $chain);
2428         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2429             if (ref($rule)) {
2430                 ruleset_generate_rule($ruleset, $chain, $rule);
2431             } else {
2432                 ruleset_addrule($ruleset, $chain, $rule);
2433             }
2434         }
2435     }
2436 }
2437
2438 sub generate_ipset_chains {
2439     my ($ipset_ruleset, $fw_conf) = @_;
2440
2441     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2442         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2443     }
2444 }
2445
2446 sub generate_ipset {
2447     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2448
2449     my $hashsize = scalar(@$options);
2450     if ($hashsize <= 64) {
2451         $hashsize = 64;
2452     } else {
2453         $hashsize = round_powerof2($hashsize);
2454     }
2455
2456     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2457
2458     # remove duplicates
2459     my $nethash = {};
2460     foreach my $entry (@$options) {
2461         my $cidr = $entry->{cidr};
2462         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2463             my $alias = lc($cidr);
2464             if ($aliases->{$alias}) {
2465                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2466                 $nethash->{$entry->{cidr}} = $entry;
2467             } else {
2468                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2469             }
2470         } else {
2471             $nethash->{$entry->{cidr}} = $entry;
2472         }
2473     }
2474
2475     foreach my $cidr (sort keys %$nethash) {
2476         my $entry = $nethash->{$cidr};
2477
2478         my $cmd = "add $name $cidr";
2479         if ($entry->{nomatch}) {
2480             if ($feature_ipset_nomatch) {
2481                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2482             } else {
2483                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2484             }
2485         } else {
2486             push @{$ipset_ruleset->{$name}}, $cmd;
2487         }
2488     }
2489 }
2490
2491 sub round_powerof2 {
2492     my ($int) = @_;
2493
2494     $int--;
2495     $int |= $int >> $_ foreach (1,2,4,8,16);
2496     return ++$int;
2497 }
2498
2499 sub load_clusterfw_conf {
2500     my ($filename) = @_;
2501
2502     $filename = $clusterfw_conf_filename if !defined($filename);
2503
2504     my $cluster_conf = {};
2505     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2506         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2507     }
2508
2509     return $cluster_conf;
2510 }
2511
2512 sub save_clusterfw_conf {
2513     my ($cluster_conf) = @_;
2514
2515     my $raw = '';
2516
2517     my $options = $cluster_conf->{options};
2518     $raw .= &$format_options($options) if scalar(keys %$options);
2519
2520     my $aliases = $cluster_conf->{aliases};
2521     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2522
2523     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2524         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2525             my $utf8comment = encode('utf8', $comment);
2526             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2527         } else {
2528             $raw .= "[IPSET $ipset]\n\n";
2529         }
2530         my $options = $cluster_conf->{ipset}->{$ipset};
2531         $raw .= &$format_ipset($options);
2532         $raw .= "\n";
2533     }
2534
2535     my $rules = $cluster_conf->{rules};
2536     if (scalar(@$rules)) {
2537         $raw .= "[RULES]\n\n";
2538         $raw .= &$format_rules($rules, 1);
2539         $raw .= "\n";
2540     }
2541
2542     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2543         my $rules = $cluster_conf->{groups}->{$group};
2544         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2545             my $utf8comment = encode('utf8', $comment);
2546             $raw .= "[group $group] # $utf8comment\n\n";
2547         } else {
2548             $raw .= "[group $group]\n\n";
2549         }
2550
2551         $raw .= &$format_rules($rules, 0);
2552         $raw .= "\n";
2553     }
2554
2555     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2556 }
2557
2558 sub load_hostfw_conf {
2559     my ($filename) = @_;
2560
2561     $filename = $hostfw_conf_filename if !defined($filename);
2562
2563     my $hostfw_conf = {};
2564     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2565         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2566     }
2567     return $hostfw_conf;
2568 }
2569
2570 sub save_hostfw_conf {
2571     my ($hostfw_conf) = @_;
2572
2573     my $raw = '';
2574
2575     my $options = $hostfw_conf->{options};
2576     $raw .= &$format_options($options) if scalar(keys %$options);
2577
2578     my $rules = $hostfw_conf->{rules};
2579     if (scalar(@$rules)) {
2580         $raw .= "[RULES]\n\n";
2581         $raw .= &$format_rules($rules, 1);
2582         $raw .= "\n";
2583     }
2584
2585     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2586 }
2587
2588 sub compile {
2589     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2590
2591     my $vmfw_configs;
2592
2593     if ($vmdata) { # test mode
2594         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2595         my $filename = "$testdir/cluster.fw";
2596         die "missing test file '$filename'\n" if ! -f $filename;
2597         $cluster_conf = load_clusterfw_conf($filename);
2598
2599         $filename = "$testdir/host.fw";
2600         die "missing test file '$filename'\n" if ! -f $filename;
2601         $hostfw_conf = load_hostfw_conf($filename);
2602
2603         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2604     } else { # normal operation
2605         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2606
2607         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2608
2609         $vmdata = read_local_vm_config();
2610         $vmfw_configs = read_vm_firewall_configs($vmdata);
2611     }
2612
2613
2614     $cluster_conf->{ipset}->{venet0} = [];
2615
2616     my $ruleset = {};
2617
2618     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2619     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2620
2621     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2622
2623     my $hostfw_options = $hostfw_conf->{options} || {};
2624
2625     # fixme: what log level should we use here?
2626     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2627
2628     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2629
2630     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2631     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2632     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2633
2634     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2635     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2636
2637     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2638
2639     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2640     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2641
2642     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2643     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2644
2645     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2646
2647     generate_std_chains($ruleset, $hostfw_options);
2648
2649     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2650
2651     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2652
2653     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2654
2655     # generate firewall rules for QEMU VMs
2656     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2657         my $conf = $vmdata->{qemu}->{$vmid};
2658         my $vmfw_conf = $vmfw_configs->{$vmid};
2659         next if !$vmfw_conf;
2660         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2661
2662         foreach my $netid (keys %$conf) {
2663             next if $netid !~ m/^net(\d+)$/;
2664             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2665             next if !$net->{firewall};
2666             my $iface = "tap${vmid}i$1";
2667
2668             my $macaddr = $net->{macaddr};
2669             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2670                                          $vmfw_conf, $vmid, 'IN');
2671             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2672                                          $vmfw_conf, $vmid, 'OUT');
2673         }
2674     }
2675
2676     # generate firewall rules for OpenVZ containers
2677     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2678         my $conf = $vmdata->{openvz}->{$vmid};
2679
2680         my $vmfw_conf = $vmfw_configs->{$vmid};
2681         next if !$vmfw_conf;
2682         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2683
2684         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2685             my $ip = $conf->{ip_address}->{value};
2686             $ip =~ s/\s+/,/g;
2687             parse_address_list($ip); # make sure we have a valid $ip list
2688
2689             my @ips = split(',', $ip);
2690
2691             foreach my $singleip (@ips) {
2692                 my $venet0ipset = {};
2693                 $venet0ipset->{cidr} = $singleip;
2694                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2695             }
2696
2697             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2698             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2699         }
2700
2701         if ($conf->{netif} && $conf->{netif}->{value}) {
2702             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2703             foreach my $netid (keys %$netif) {
2704                 my $d = $netif->{$netid};
2705
2706                 my $macaddr = $d->{mac};
2707                 my $iface = $d->{host_ifname};
2708                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2709                                              $vmfw_conf, $vmid, 'IN');
2710                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2711                                              $vmfw_conf, $vmid, 'OUT');
2712             }
2713         }
2714     }
2715
2716     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2717         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2718     }
2719
2720     my $ipset_ruleset = {};
2721     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2722
2723     return ($ruleset, $ipset_ruleset);
2724 }
2725
2726 sub get_ruleset_status {
2727     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2728
2729     my $statushash = {};
2730
2731     foreach my $chain (sort keys %$ruleset) {
2732         my $sig = &$digest_fn($ruleset->{$chain});
2733
2734         $statushash->{$chain}->{sig} = $sig;
2735
2736         my $oldsig = $active_chains->{$chain};
2737         if (!defined($oldsig)) {
2738             $statushash->{$chain}->{action} = 'create';
2739         } else {
2740             if ($oldsig eq $sig) {
2741                 $statushash->{$chain}->{action} = 'exists';
2742             } else {
2743                 $statushash->{$chain}->{action} = 'update';
2744             }
2745         }
2746         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2747         foreach my $cmd (@{$ruleset->{$chain}}) {
2748             print "\t$cmd\n" if $verbose;
2749         }
2750     }
2751
2752     foreach my $chain (sort keys %$active_chains) {
2753         if (!defined($ruleset->{$chain})) {
2754             my $sig = $active_chains->{$chain};
2755             $statushash->{$chain}->{action} = 'delete';
2756             $statushash->{$chain}->{sig} = $sig;
2757             print "delete $chain ($sig)\n" if $verbose;
2758         }
2759     }
2760
2761     return $statushash;
2762 }
2763
2764 sub print_sig_rule {
2765     my ($chain, $sig) = @_;
2766
2767     # We just use this to store a SHA1 checksum used to detect changes
2768     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2769 }
2770
2771 sub get_ruleset_cmdlist {
2772     my ($ruleset, $verbose) = @_;
2773
2774     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2775
2776     my ($active_chains, $hooks) = iptables_get_chains();
2777     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2778
2779     # create missing chains first
2780     foreach my $chain (sort keys %$ruleset) {
2781         my $stat = $statushash->{$chain};
2782         die "internal error" if !$stat;
2783         next if $stat->{action} ne 'create';
2784
2785         $cmdlist .= ":$chain - [0:0]\n";
2786     }
2787
2788     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2789         if (!$hooks->{$h}) {
2790             $cmdlist .= "-A $h -j PVEFW-$h\n";
2791         }
2792     }
2793
2794     foreach my $chain (sort keys %$ruleset) {
2795         my $stat = $statushash->{$chain};
2796         die "internal error" if !$stat;
2797
2798         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2799             $cmdlist .= "-F $chain\n";
2800             foreach my $cmd (@{$ruleset->{$chain}}) {
2801                 $cmdlist .= "$cmd\n";
2802             }
2803             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2804         } elsif ($stat->{action} eq 'delete') {
2805             die "internal error"; # this should not happen
2806         } elsif ($stat->{action} eq 'exists') {
2807             # do nothing
2808         } else {
2809             die "internal error - unknown status '$stat->{action}'";
2810         }
2811     }
2812
2813     foreach my $chain (keys %$statushash) {
2814         next if $statushash->{$chain}->{action} ne 'delete';
2815         $cmdlist .= "-F $chain\n";
2816     }
2817     foreach my $chain (keys %$statushash) {
2818         next if $statushash->{$chain}->{action} ne 'delete';
2819         next if $chain eq 'PVEFW-INPUT';
2820         next if $chain eq 'PVEFW-OUTPUT';
2821         next if $chain eq 'PVEFW-FORWARD';
2822         $cmdlist .= "-X $chain\n";
2823     }
2824
2825     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2826
2827     $cmdlist .= "COMMIT\n";
2828
2829     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2830 }
2831
2832 sub get_ipset_cmdlist {
2833     my ($ruleset, $verbose) = @_;
2834
2835     my $cmdlist = "";
2836
2837     my $delete_cmdlist = "";
2838
2839     my $active_chains = ipset_get_chains();
2840     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2841
2842     # remove stale _swap chains
2843     foreach my $chain (keys %$active_chains) {
2844         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2845             $cmdlist .= "destroy $chain\n";
2846         }
2847     }
2848
2849     foreach my $chain (sort keys %$ruleset) {
2850         my $stat = $statushash->{$chain};
2851         die "internal error" if !$stat;
2852
2853         if ($stat->{action} eq 'create') {
2854             foreach my $cmd (@{$ruleset->{$chain}}) {
2855                 $cmdlist .= "$cmd\n";
2856             }
2857         }
2858
2859         if ($stat->{action} eq 'update') {
2860             my $chain_swap = $chain."_swap";
2861
2862             foreach my $cmd (@{$ruleset->{$chain}}) {
2863                 $cmd =~ s/$chain/$chain_swap/;
2864                 $cmdlist .= "$cmd\n";
2865             }
2866             $cmdlist .= "swap $chain_swap $chain\n";
2867             $cmdlist .= "flush $chain_swap\n";
2868             $cmdlist .= "destroy $chain_swap\n";
2869         }
2870
2871     }
2872
2873     foreach my $chain (keys %$statushash) {
2874         next if $statushash->{$chain}->{action} ne 'delete';
2875
2876         $delete_cmdlist .= "flush $chain\n";
2877         $delete_cmdlist .= "destroy $chain\n";
2878     }
2879
2880     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2881
2882     return ($cmdlist, $delete_cmdlist, $changes);
2883 }
2884
2885 sub apply_ruleset {
2886     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2887
2888     enable_bridge_firewall();
2889
2890     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2891         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2892
2893     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2894
2895     if ($verbose) {
2896         if ($ipset_changes) {
2897             print "ipset changes:\n";
2898             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2899             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2900         }
2901
2902         if ($changes) {
2903             print "iptables changes:\n";
2904             print $cmdlist;
2905         }
2906     }
2907
2908     ipset_restore_cmdlist($ipset_create_cmdlist);
2909
2910     iptables_restore_cmdlist($cmdlist);
2911
2912     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2913
2914     # test: re-read status and check if everything is up to date
2915     my $active_chains = iptables_get_chains();
2916     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2917
2918     my $errors;
2919     foreach my $chain (sort keys %$ruleset) {
2920         my $stat = $statushash->{$chain};
2921         if ($stat->{action} ne 'exists') {
2922             warn "unable to update chain '$chain'\n";
2923             $errors = 1;
2924         }
2925     }
2926
2927     die "unable to apply firewall changes\n" if $errors;
2928
2929     update_nf_conntrack_max($hostfw_conf);
2930
2931     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2932
2933 }
2934
2935 sub update_nf_conntrack_max {
2936     my ($hostfw_conf) = @_;
2937
2938     my $max = 65536; # reasonable default
2939
2940     my $options = $hostfw_conf->{options} || {};
2941
2942     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2943         $max = $options->{nf_conntrack_max};
2944         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2945     }
2946
2947     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2948     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2949
2950     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2951
2952     if ($current != $max) {
2953         my $hashsize = int($max/4);
2954         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2955         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2956     }
2957 }
2958
2959 sub update_nf_conntrack_tcp_timeout_established {
2960     my ($hostfw_conf) = @_;
2961
2962     my $options = $hostfw_conf->{options} || {};
2963
2964     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2965
2966     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2967 }
2968
2969 sub remove_pvefw_chains {
2970
2971     my ($chash, $hooks) = iptables_get_chains();
2972     my $cmdlist = "*filter\n";
2973
2974     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2975         if ($hooks->{$h}) {
2976             $cmdlist .= "-D $h -j PVEFW-$h\n";
2977         }
2978     }
2979
2980     foreach my $chain (keys %$chash) {
2981         $cmdlist .= "-F $chain\n";
2982     }
2983
2984     foreach my $chain (keys %$chash) {
2985         $cmdlist .= "-X $chain\n";
2986     }
2987     $cmdlist .= "COMMIT\n";
2988
2989     iptables_restore_cmdlist($cmdlist);
2990 }
2991
2992 sub init {
2993     my $cluster_conf = load_clusterfw_conf();
2994     my $cluster_options = $cluster_conf->{options};
2995     my $enable = $cluster_options->{enable};
2996
2997     return if !$enable;
2998
2999     # load required modules here
3000 }
3001
3002 sub update {
3003     my ($verbose) = @_;
3004
3005     my $code = sub {
3006
3007         my $cluster_conf = load_clusterfw_conf();
3008         my $cluster_options = $cluster_conf->{options};
3009
3010         my $enable = $cluster_options->{enable};
3011
3012         die "Firewall is disabled - cannot start\n" if !$enable;
3013
3014         if (!$enable) {
3015             PVE::Firewall::remove_pvefw_chains();
3016             print "Firewall disabled\n" if $verbose;
3017             return;
3018         }
3019
3020         my $hostfw_conf = load_hostfw_conf();
3021
3022         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3023
3024         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
3025     };
3026
3027     run_locked($code);
3028 }
3029
3030 1;