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 $__cluster_network;
 709
 710 sub cluster_network {
 711     my ($new_value) = @_;
 712
 713     $__cluster_network = $new_value if defined($new_value);
 714
 715     return $__cluster_network if defined($__cluster_network);
 716
 717     eval {
 718         my $nodename = PVE::INotify::nodename();
 719
 720         my $ip = PVE::Cluster::remote_node_ip($nodename);
 721
 722         my $testip = Net::IP->new($ip);
 723
 724         my $routes = PVE::ProcFSTools::read_proc_net_route();
 725         foreach my $entry (@$routes) {
 726             my $mask = $ipv4_mask_hash_clusternet->{$entry->{mask}};
 727             next if !defined($mask);
 728             return if $mask eq '0.0.0.0';
 729             my $cidr = "$entry->{dest}/$mask";
 730             my $testnet = Net::IP->new($cidr);
 731             if ($testnet->overlaps($testip)) {
 732                 $__cluster_network = $cidr;
 733                 return;
 734             }
 735         }
 736     };
 737     warn $@ if $@;
 738
 739     return $__cluster_network;
 740 }
 741
 742 sub parse_address_list {
 743     my ($str) = @_;
 744
 745     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 746     return if $str =~ m/^${ip_alias_pattern}$/;
 747
 748     my $count = 0;
 749     my $iprange = 0;
 750     foreach my $elem (split(/,/, $str)) {
 751         $count++;
 752         if (!Net::IP->new($elem)) {
 753             my $err = Net::IP::Error();
 754             die "invalid IP address: $err\n";
 755         }
 756         $iprange = 1 if $elem =~ m/-/;
 757     }
 758
 759     die "you can use a range in a list\n" if $iprange && $count > 1;
 760 }
 761
 762 sub parse_port_name_number_or_range {
 763     my ($str) = @_;
 764
 765     my $services = PVE::Firewall::get_etc_services();
 766     my $count = 0;
 767     my $icmp_port = 0;
 768
 769     foreach my $item (split(/,/, $str)) {
 770         $count++;
 771         if ($item =~ m/^(\d+):(\d+)$/) {
 772             my ($port1, $port2) = ($1, $2);
 773             die "invalid port '$port1'\n" if $port1 > 65535;
 774             die "invalid port '$port2'\n" if $port2 > 65535;
 775         } elsif ($item =~ m/^(\d+)$/) {
 776             my $port = $1;
 777             die "invalid port '$port'\n" if $port > 65535;
 778         } else {
 779             if ($icmp_type_names->{$item}) {
 780                 $icmp_port = 1;
 781             } else {
 782                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 783             }
 784         }
 785     }
 786
 787     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 788
 789     return $count;
 790 }
 791
 792 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 793 sub pve_fw_verify_port_spec {
 794    my ($portstr) = @_;
 795
 796    parse_port_name_number_or_range($portstr);
 797
 798    return $portstr;
 799 }
 800
 801 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 802 sub pve_fw_verify_v4addr_spec {
 803    my ($list) = @_;
 804
 805    parse_address_list($list);
 806
 807    return $list;
 808 }
 809
 810 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 811 sub pve_fw_verify_protocol_spec {
 812    my ($proto) = @_;
 813
 814    my $protocols = get_etc_protocols();
 815
 816    die "unknown protocol '$proto'\n" if $proto &&
 817        !(defined($protocols->{byname}->{$proto}) ||
 818          defined($protocols->{byid}->{$proto}));
 819
 820    return $proto;
 821 }
 822
 823
 824 # helper function for API
 825
 826 sub copy_opject_with_digest {
 827     my ($object) = @_;
 828
 829     my $sha = Digest::SHA->new('sha1');
 830
 831     my $res = {};
 832     foreach my $k (sort keys %$object) {
 833         my $v = $object->{$k};
 834         next if !defined($v);
 835         $res->{$k} = $v;
 836         $sha->add($k, ':', $v, "\n");
 837     }
 838
 839     my $digest = $sha->hexdigest;
 840
 841     $res->{digest} = $digest;
 842
 843     return wantarray ? ($res, $digest) : $res;
 844 }
 845
 846 sub copy_list_with_digest {
 847     my ($list) = @_;
 848
 849     my $sha = Digest::SHA->new('sha1');
 850
 851     my $res = [];
 852     foreach my $entry (@$list) {
 853         my $data = {};
 854         foreach my $k (sort keys %$entry) {
 855             my $v = $entry->{$k};
 856             next if !defined($v);
 857             $data->{$k} = $v;
 858             $sha->add($k, ':', $v, "\n");
 859         }
 860         push @$res, $data;
 861     }
 862
 863     my $digest = $sha->hexdigest;
 864
 865     foreach my $entry (@$res) {
 866         $entry->{digest} = $digest;
 867     }
 868
 869     return wantarray ? ($res, $digest) : $res;
 870 }
 871
 872 my $rule_properties = {
 873     pos => {
 874         description => "Update rule at position <pos>.",
 875         type => 'integer',
 876         minimum => 0,
 877         optional => 1,
 878     },
 879     digest => get_standard_option('pve-config-digest'),
 880     type => {
 881         type => 'string',
 882         optional => 1,
 883         enum => ['in', 'out', 'group'],
 884     },
 885     action => {
 886         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 887         type => 'string',
 888         optional => 1,
 889         pattern => $security_group_name_pattern,
 890         maxLength => 20,
 891         minLength => 2,
 892     },
 893     macro => {
 894         type => 'string',
 895         optional => 1,
 896         maxLength => 128,
 897     },
 898     iface => get_standard_option('pve-iface', { optional => 1 }),
 899     source => {
 900         type => 'string', format => 'pve-fw-v4addr-spec',
 901         optional => 1,
 902     },
 903     dest => {
 904         type => 'string', format => 'pve-fw-v4addr-spec',
 905         optional => 1,
 906     },
 907     proto => {
 908         type => 'string', format => 'pve-fw-protocol-spec',
 909         optional => 1,
 910     },
 911     enable => {
 912         type => 'boolean',
 913         optional => 1,
 914     },
 915     sport => {
 916         type => 'string', format => 'pve-fw-port-spec',
 917         optional => 1,
 918     },
 919     dport => {
 920         type => 'string', format => 'pve-fw-port-spec',
 921         optional => 1,
 922     },
 923     comment => {
 924         type => 'string',
 925         optional => 1,
 926     },
 927 };
 928
 929 sub add_rule_properties {
 930     my ($properties) = @_;
 931
 932     foreach my $k (keys %$rule_properties) {
 933         my $h = $rule_properties->{$k};
 934         # copy data, so that we can modify later without side effects
 935         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 936     }
 937
 938     return $properties;
 939 }
 940
 941 sub delete_rule_properties {
 942     my ($rule, $delete_str) = @_;
 943
 944     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 945         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 946             if !defined($rule_properties->{$opt});
 947         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 948             if $opt eq 'type' || $opt eq 'action';
 949         delete $rule->{$opt};
 950     }
 951
 952     return $rule;
 953 }
 954
 955 my $apply_macro = sub {
 956     my ($macro_name, $param, $verify) = @_;
 957
 958     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 959     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 960
 961     my $rules = [];
 962
 963     foreach my $templ (@$macro_rules) {
 964         my $rule = {};
 965         my $param_used = {};
 966         foreach my $k (keys %$templ) {
 967             my $v = $templ->{$k};
 968             if ($v eq 'PARAM') {
 969                 $v = $param->{$k};
 970                 $param_used->{$k} = 1;
 971             } elsif ($v eq 'DEST') {
 972                 $v = $param->{dest};
 973                 $param_used->{dest} = 1;
 974             } elsif ($v eq 'SOURCE') {
 975                 $v = $param->{source};
 976                 $param_used->{source} = 1;
 977             }
 978
 979             if (!defined($v)) {
 980                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 981                 raise_param_exc({ macro => $msg }) if $verify;
 982                 die "$msg\n";
 983             }
 984             $rule->{$k} = $v;
 985         }
 986         foreach my $k (keys %$param) {
 987             next if $k eq 'macro';
 988             next if !defined($param->{$k});
 989             next if $param_used->{$k};
 990             if (defined($rule->{$k})) {
 991                 if ($rule->{$k} ne $param->{$k}) {
 992                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 993                     raise_param_exc({ $k => $msg }) if $verify;
 994                     die "$msg\n";
 995                 }
 996             } else {
 997                 $rule->{$k} = $param->{$k};
 998             }
 999         }
1000         push @$rules, $rule;
1001     }
1002
1003     return $rules;
1004 };
1005
1006 sub verify_rule {
1007     my ($rule, $allow_groups) = @_;
1008
1009     my $type = $rule->{type};
1010
1011     raise_param_exc({ type => "missing property"}) if !$type;
1012     raise_param_exc({ action => "missing property"}) if !$rule->{action};
1013
1014     if ($type eq  'in' || $type eq 'out') {
1015         raise_param_exc({ action => "unknown action '$rule->{action}'"})
1016             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
1017     } elsif ($type eq 'group') {
1018         raise_param_exc({ type => "security groups not allowed"})
1019             if !$allow_groups;
1020         raise_param_exc({ action => "invalid characters in security group name"})
1021             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
1022     } else {
1023         raise_param_exc({ type => "unknown rule type '$type'"});
1024     }
1025
1026     if ($rule->{iface}) {
1027         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1028         raise_param_exc({ iface => $@ }) if $@;
1029     }
1030
1031     if ($rule->{macro}) {
1032         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1033         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1034         $rule->{macro} = $preferred_name;
1035     }
1036
1037     if ($rule->{dport}) {
1038         eval { parse_port_name_number_or_range($rule->{dport}); };
1039         raise_param_exc({ dport => $@ }) if $@;
1040     }
1041
1042     if ($rule->{sport}) {
1043         eval { parse_port_name_number_or_range($rule->{sport}); };
1044         raise_param_exc({ sport => $@ }) if $@;
1045     }
1046
1047     if ($rule->{source}) {
1048         eval { parse_address_list($rule->{source}); };
1049         raise_param_exc({ source => $@ }) if $@;
1050     }
1051
1052     if ($rule->{dest}) {
1053         eval { parse_address_list($rule->{dest}); };
1054         raise_param_exc({ dest => $@ }) if $@;
1055     }
1056
1057     if ($rule->{macro}) {
1058         &$apply_macro($rule->{macro}, $rule, 1);
1059     }
1060
1061     return $rule;
1062 }
1063
1064 sub copy_rule_data {
1065     my ($rule, $param) = @_;
1066
1067     foreach my $k (keys %$rule_properties) {
1068         if (defined(my $v = $param->{$k})) {
1069             if ($v eq '' || $v eq '-') {
1070                 delete $rule->{$k};
1071             } else {
1072                 $rule->{$k} = $v;
1073             }
1074         } else {
1075             delete $rule->{$k};
1076         }
1077     }
1078
1079     # verify rule now
1080
1081     return $rule;
1082 }
1083
1084 # core functions
1085 my $bridge_firewall_enabled = 0;
1086
1087 sub enable_bridge_firewall {
1088
1089     return if $bridge_firewall_enabled; # only once
1090
1091     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1092     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1093
1094     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1095     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1096
1097     $bridge_firewall_enabled = 1;
1098 }
1099
1100 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1101
1102 sub iptables_restore_cmdlist {
1103     my ($cmdlist) = @_;
1104
1105     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1106 }
1107
1108 sub ipset_restore_cmdlist {
1109     my ($cmdlist) = @_;
1110
1111     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1112 }
1113
1114 sub iptables_get_chains {
1115
1116     my $res = {};
1117
1118     # check what chains we want to track
1119     my $is_pvefw_chain = sub {
1120         my $name = shift;
1121
1122         return 1 if $name =~ m/^PVEFW-\S+$/;
1123
1124         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1125
1126         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1127
1128         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1129
1130         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1131         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1132
1133         return undef;
1134     };
1135
1136     my $table = '';
1137
1138     my $hooks = {};
1139
1140     my $parser = sub {
1141         my $line = shift;
1142
1143         return if $line =~ m/^#/;
1144         return if $line =~ m/^\s*$/;
1145
1146         if ($line =~ m/^\*(\S+)$/) {
1147             $table = $1;
1148             return;
1149         }
1150
1151         return if $table ne 'filter';
1152
1153         if ($line =~ m/^:(\S+)\s/) {
1154             my $chain = $1;
1155             return if !&$is_pvefw_chain($chain);
1156             $res->{$chain} = "unknown";
1157         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1158             my ($chain, $sig) = ($1, $2);
1159             return if !&$is_pvefw_chain($chain);
1160             $res->{$chain} = $sig;
1161         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1162             $hooks->{$1} = 1;
1163         } else {
1164             # simply ignore the rest
1165             return;
1166         }
1167     };
1168
1169     run_command("/sbin/iptables-save", outfunc => $parser);
1170
1171     return wantarray ? ($res, $hooks) : $res;
1172 }
1173
1174 sub iptables_chain_digest {
1175     my ($rules) = @_;
1176     my $digest = Digest::SHA->new('sha1');
1177     foreach my $rule (@$rules) { # order is important
1178         $digest->add($rule);
1179     }
1180     return $digest->b64digest;
1181 }
1182
1183 sub ipset_chain_digest {
1184     my ($rules) = @_;
1185
1186     my $digest = Digest::SHA->new('sha1');
1187     foreach my $rule (sort @$rules) { # note: sorted
1188         $digest->add($rule);
1189     }
1190     return $digest->b64digest;
1191 }
1192
1193 sub ipset_get_chains {
1194
1195     my $res = {};
1196     my $chains = {};
1197
1198     my $parser = sub {
1199         my $line = shift;
1200
1201         return if $line =~ m/^#/;
1202         return if $line =~ m/^\s*$/;
1203         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1204             my $chain = $1;
1205             $line =~ s/\s+$//; # delete trailing white space
1206             push @{$chains->{$chain}}, $line;
1207         } else {
1208             # simply ignore the rest
1209             return;
1210         }
1211     };
1212
1213     run_command("/usr/sbin/ipset save", outfunc => $parser);
1214
1215     # compute digest for each chain
1216     foreach my $chain (keys %$chains) {
1217         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1218     }
1219
1220     return $res;
1221 }
1222
1223 sub ruleset_generate_cmdstr {
1224     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1225
1226     return if defined($rule->{enable}) && !$rule->{enable};
1227
1228     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1229
1230     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1231     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1232
1233     my @cmd = ();
1234
1235     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1236     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1237
1238     my $source = $rule->{source};
1239     my $dest = $rule->{dest};
1240
1241     if ($source) {
1242         if ($source =~ m/^\+/) {
1243             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1244                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1245                 push @cmd, "-m set --match-set PVEFW-$1 src";
1246             } else {
1247                 die "invalid security group name '$source'\n";
1248             }
1249         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1250             my $alias = lc($source);
1251             my $e = $cluster_conf->{aliases}->{$alias};
1252             die "no such alias $source\n" if !$e;
1253             push @cmd, "-s $e->{cidr}";
1254         } elsif ($source =~ m/\-/){
1255             push @cmd, "-m iprange --src-range $source";
1256
1257         } else {
1258             push @cmd, "-s $source";
1259         }
1260     }
1261
1262     if ($dest) {
1263         if ($dest =~ m/^\+/) {
1264             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1265                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1266                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1267             } else {
1268                 die "invalid security group name '$dest'\n";
1269             }
1270         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1271             my $alias = lc($dest);
1272             my $e = $cluster_conf->{aliases}->{$alias};
1273             die "no such alias $dest" if !$e;
1274             push @cmd, "-d $e->{cidr}";
1275         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1276             push @cmd, "-m iprange --dst-range $dest";
1277
1278         } else {
1279             push @cmd, "-d $dest";
1280         }
1281     }
1282
1283     if ($rule->{proto}) {
1284         push @cmd, "-p $rule->{proto}";
1285
1286         my $multiport = 0;
1287         $multiport++ if $nbdport > 1;
1288         $multiport++ if $nbsport > 1;
1289
1290         push @cmd, "--match multiport" if $multiport;
1291
1292         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1293             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1294
1295         if ($rule->{dport}) {
1296             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1297                 # Note: we use dport to store --icmp-type
1298                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1299                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1300             } else {
1301                 if ($nbdport > 1) {
1302                     if ($multiport == 2) {
1303                         push @cmd,  "--ports $rule->{dport}";
1304                     } else {
1305                         push @cmd, "--dports $rule->{dport}";
1306                     }
1307                 } else {
1308                     push @cmd, "--dport $rule->{dport}";
1309                 }
1310             }
1311         }
1312
1313         if ($rule->{sport}) {
1314             if ($nbsport > 1) {
1315                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1316             } else {
1317                 push @cmd, "--sport $rule->{sport}";
1318             }
1319         }
1320     } elsif ($rule->{dport} || $rule->{sport}) {
1321         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1322         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1323     }
1324
1325     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1326
1327     if (my $action = $rule->{action}) {
1328         $action = $actions->{$action} if defined($actions->{$action});
1329         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1330         push @cmd, $goto ? "-g $action" : "-j $action";
1331     }
1332
1333     return scalar(@cmd) ? join(' ', @cmd) : undef;
1334 }
1335
1336 sub ruleset_generate_rule {
1337     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1338
1339     my $rules;
1340
1341     if ($rule->{macro}) {
1342         $rules = &$apply_macro($rule->{macro}, $rule);
1343     } else {
1344         $rules = [ $rule ];
1345     }
1346
1347     # update all or nothing
1348
1349     my @cmds = ();
1350     foreach my $tmp (@$rules) {
1351         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1352             push @cmds, $cmdstr;
1353         }
1354     }
1355
1356     foreach my $cmdstr (@cmds) {
1357         ruleset_addrule($ruleset, $chain, $cmdstr);
1358     }
1359 }
1360
1361 sub ruleset_generate_rule_insert {
1362     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1363
1364     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1365
1366     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1367         ruleset_insertrule($ruleset, $chain, $cmdstr);
1368     }
1369 }
1370
1371 sub ruleset_create_chain {
1372     my ($ruleset, $chain) = @_;
1373
1374     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1375     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1376
1377     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1378
1379     $ruleset->{$chain} = [];
1380 }
1381
1382 sub ruleset_chain_exist {
1383     my ($ruleset, $chain) = @_;
1384
1385     return $ruleset->{$chain} ? 1 : undef;
1386 }
1387
1388 sub ruleset_addrule {
1389    my ($ruleset, $chain, $rule) = @_;
1390
1391    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1392
1393    push @{$ruleset->{$chain}}, "-A $chain $rule";
1394 }
1395
1396 sub ruleset_insertrule {
1397    my ($ruleset, $chain, $rule) = @_;
1398
1399    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1400
1401    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1402 }
1403
1404 sub get_log_rule_base {
1405     my ($chain, $vmid, $msg, $loglevel) = @_;
1406
1407     die "internal error - no log level" if !defined($loglevel);
1408
1409     $vmid = 0 if !defined($vmid);
1410
1411     # Note: we use special format for prefix to pass further
1412     # info to log daemon (VMID, LOGVELEL and CHAIN)
1413
1414     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1415 }
1416
1417 sub ruleset_addlog {
1418     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1419
1420     return if !defined($loglevel);
1421
1422     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1423
1424     $logrule = "$rule $logrule" if defined($rule);
1425
1426     ruleset_addrule($ruleset, $chain, $logrule);
1427 }
1428
1429 sub ruleset_add_chain_policy {
1430     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1431
1432     if ($policy eq 'ACCEPT') {
1433
1434         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1435                               { ACCEPT =>  $accept_action});
1436
1437     } elsif ($policy eq 'DROP') {
1438
1439         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1440
1441         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1442
1443         ruleset_addrule($ruleset, $chain, "-j DROP");
1444     } elsif ($policy eq 'REJECT') {
1445         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1446
1447         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1448
1449         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1450     } else {
1451         # should not happen
1452         die "internal error: unknown policy '$policy'";
1453     }
1454 }
1455
1456 sub ruleset_chain_add_conn_filters {
1457     my ($ruleset, $chain, $accept) = @_;
1458
1459     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1460     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1461 }
1462
1463 sub ruleset_chain_add_input_filters {
1464     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1465
1466     if ($cluster_conf->{ipset}->{blacklist}){
1467         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1468         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1469     }
1470
1471     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1472         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1473     }
1474
1475     if ($options->{tcpflags}) {
1476         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1477     }
1478 }
1479
1480 sub ruleset_create_vm_chain {
1481     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1482
1483     ruleset_create_chain($ruleset, $chain);
1484     my $accept = generate_nfqueue($options);
1485
1486     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1487         if ($direction eq 'OUT') {
1488             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1489                                                       proto => 'udp', sport => 68, dport => 67 });
1490         } else {
1491             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1492                                                       proto => 'udp', sport => 67, dport => 68 });
1493         }
1494     }
1495
1496     if ($direction eq 'OUT') {
1497         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1498             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1499         }
1500         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1501     }
1502 }
1503
1504 sub ruleset_add_group_rule {
1505     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1506
1507     my $group = $rule->{action};
1508     my $group_chain = "GROUP-$group-$direction";
1509     if(!ruleset_chain_exist($ruleset, $group_chain)){
1510         generate_group_rules($ruleset, $cluster_conf, $group);
1511     }
1512
1513     if ($direction eq 'OUT' && $rule->{iface_out}) {
1514         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1515     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1516         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1517     } else {
1518         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1519     }
1520
1521     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1522 }
1523
1524 sub ruleset_generate_vm_rules {
1525     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1526
1527     my $lc_direction = lc($direction);
1528
1529     my $in_accept = generate_nfqueue($options);
1530
1531     foreach my $rule (@$rules) {
1532         next if $rule->{iface} && $rule->{iface} ne $netid;
1533         next if !$rule->{enable};
1534         if ($rule->{type} eq 'group') {
1535             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1536                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1537         } else {
1538             next if $rule->{type} ne $lc_direction;
1539             eval {
1540                 if ($direction eq 'OUT') {
1541                     ruleset_generate_rule($ruleset, $chain, $rule,
1542                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1543                                           undef, $cluster_conf);
1544                 } else {
1545                     ruleset_generate_rule($ruleset, $chain, $rule,
1546                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1547                                           undef, $cluster_conf);
1548                 }
1549             };
1550             warn $@ if $@;
1551         }
1552     }
1553 }
1554
1555 sub generate_nfqueue {
1556     my ($options) = @_;
1557
1558     if ($options->{ips}) {
1559         my $action = "NFQUEUE";
1560         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1561             if (defined($3) && defined($1)) {
1562                 $action .= " --queue-balance $1:$3";
1563             } elsif (defined($1)) {
1564                 $action .= " --queue-num $1";
1565             }
1566         }
1567         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1568         return $action;
1569     } else {
1570         return "ACCEPT";
1571     }
1572 }
1573
1574 sub ruleset_generate_vm_ipsrules {
1575     my ($ruleset, $options, $direction, $iface) = @_;
1576
1577     if ($options->{ips} && $direction eq 'IN') {
1578         my $nfqueue = generate_nfqueue($options);
1579
1580         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1581             ruleset_create_chain($ruleset, "PVEFW-IPS");
1582         }
1583
1584         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1585     }
1586 }
1587
1588 sub generate_venet_rules_direction {
1589     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1590
1591     my $lc_direction = lc($direction);
1592
1593     my $rules = $vmfw_conf->{rules};
1594
1595     my $options = $vmfw_conf->{options};
1596     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1597
1598     my $chain = "venet0-$vmid-$direction";
1599
1600     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1601
1602     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1603
1604     # implement policy
1605     my $policy;
1606
1607     if ($direction eq 'OUT') {
1608         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1609     } else {
1610         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1611     }
1612
1613     my $accept = generate_nfqueue($options);
1614     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1615     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1616
1617     if ($direction eq 'OUT') {
1618         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1619             action => $chain,
1620             source => $ip,
1621             iface_in => 'venet0'});
1622     } else {
1623         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1624             action => $chain,
1625             dest => $ip,
1626             iface_out => 'venet0'});
1627     }
1628 }
1629
1630 sub generate_tap_rules_direction {
1631     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1632
1633     my $lc_direction = lc($direction);
1634
1635     my $rules = $vmfw_conf->{rules};
1636
1637     my $options = $vmfw_conf->{options};
1638     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1639
1640     my $tapchain = "$iface-$direction";
1641
1642     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1643
1644     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1645
1646     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1647
1648     # implement policy
1649     my $policy;
1650
1651     if ($direction eq 'OUT') {
1652         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1653     } else {
1654         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1655     }
1656
1657     my $accept = generate_nfqueue($options);
1658     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1659     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1660
1661     # plug the tap chain to bridge chain
1662     if ($direction eq 'IN') {
1663         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1664                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1665     } else {
1666         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1667                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1668     }
1669 }
1670
1671 sub enable_host_firewall {
1672     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1673
1674     my $options = $hostfw_conf->{options};
1675     my $cluster_options = $cluster_conf->{options};
1676     my $rules = $hostfw_conf->{rules};
1677     my $cluster_rules = $cluster_conf->{rules};
1678
1679     # host inbound firewall
1680     my $chain = "PVEFW-HOST-IN";
1681     ruleset_create_chain($ruleset, $chain);
1682
1683     my $loglevel = get_option_log_level($options, "log_level_in");
1684
1685     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1686
1687     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1688     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1689
1690     # we use RETURN because we need to check also tap rules
1691     my $accept_action = 'RETURN';
1692
1693     # add host rules first, so that cluster wide rules can be overwritten
1694     foreach my $rule (@$rules, @$cluster_rules) {
1695         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1696         if ($rule->{type} eq 'group') {
1697             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1698         } elsif ($rule->{type} eq 'in') {
1699             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1700                                   undef, $cluster_conf);
1701         }
1702         delete $rule->{iface_in};
1703     }
1704
1705     my $clusternet = cluster_network();
1706
1707     # allow standard traffic on cluster network
1708     if ($clusternet) {
1709         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 8006 -j $accept_action");  # PVE API
1710         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1711         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1712         ruleset_addrule($ruleset, $chain, "-s $clusternet -p tcp --dport 22 -j $accept_action");  # SSH
1713
1714         # corosync
1715         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j $accept_action";
1716         ruleset_addrule($ruleset, $chain, "-s $clusternet -d $clusternet $corosync_rule");
1717         ruleset_addrule($ruleset, $chain, "-s $clusternet -m addrtype --dst-type MULTICAST $corosync_rule");
1718     }
1719
1720     # implement input policy
1721     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1722     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1723
1724     # host outbound firewall
1725     $chain = "PVEFW-HOST-OUT";
1726     ruleset_create_chain($ruleset, $chain);
1727
1728     $loglevel = get_option_log_level($options, "log_level_out");
1729
1730     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1731
1732     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1733
1734     # we use RETURN because we may want to check other thigs later
1735     $accept_action = 'RETURN';
1736
1737     # add host rules first, so that cluster wide rules can be overwritten
1738     foreach my $rule (@$rules, @$cluster_rules) {
1739         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1740         if ($rule->{type} eq 'group') {
1741             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1742         } elsif ($rule->{type} eq 'out') {
1743             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1744                                   undef, $cluster_conf);
1745         }
1746         delete $rule->{iface_out};
1747     }
1748
1749     # allow standard traffic on cluster network
1750     if ($clusternet) {
1751         ruleset_addrule($ruleset, $chain, "-d $clusternet -p tcp --dport 8006 -j $accept_action");  # PVE API
1752         ruleset_addrule($ruleset, $chain, "-d $clusternet -p tcp --dport 22 -j $accept_action");  # SSH
1753
1754         my $corosync_rule = "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j $accept_action";
1755         ruleset_addrule($ruleset, $chain, "-d $clusternet $corosync_rule");
1756         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1757     }
1758
1759     # implement output policy
1760     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1761     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1762
1763     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1764     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1765 }
1766
1767 sub generate_group_rules {
1768     my ($ruleset, $cluster_conf, $group) = @_;
1769
1770     my $rules = $cluster_conf->{groups}->{$group};
1771
1772     if (!$rules) {
1773         warn "no such security group '$group'\n";
1774         $rules = []; # create empty chain
1775     }
1776
1777     my $chain = "GROUP-${group}-IN";
1778
1779     ruleset_create_chain($ruleset, $chain);
1780     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1781
1782     foreach my $rule (@$rules) {
1783         next if $rule->{type} ne 'in';
1784         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1785     }
1786
1787     $chain = "GROUP-${group}-OUT";
1788
1789     ruleset_create_chain($ruleset, $chain);
1790     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1791
1792     foreach my $rule (@$rules) {
1793         next if $rule->{type} ne 'out';
1794         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1795         # check also other tap rules later
1796         ruleset_generate_rule($ruleset, $chain, $rule,
1797                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1798     }
1799 }
1800
1801 my $MAX_NETS = 32;
1802 my $valid_netdev_names = {};
1803 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1804     $valid_netdev_names->{"net$i"} = 1;
1805 }
1806
1807 sub parse_fw_rule {
1808     my ($line, $allow_iface, $allow_groups) = @_;
1809
1810     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1811
1812     chomp $line;
1813
1814     # we can add single line comments to the end of the rule
1815     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1816
1817     # we can disable a rule when prefixed with '|'
1818     my $enable = 1;
1819
1820     $enable = 0 if $line =~ s/^\|//;
1821
1822     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1823         die "unable to parse rule: $line\n";
1824
1825     $type = lc($1);
1826     $action = $2;
1827
1828     if ($type eq  'in' || $type eq 'out') {
1829         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1830             # OK
1831         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1832             $action = $2;
1833             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1834             die "unknown macro '$1'\n" if !$preferred_name;
1835             $macro = $preferred_name;
1836         } else {
1837             die "unknown action '$action'\n";
1838         }
1839     } elsif ($type eq 'group') {
1840         die "groups disabled\n" if !$allow_groups;
1841         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1842     } else {
1843         die "unknown rule type '$type'\n";
1844     }
1845
1846     while (length($line)) {
1847         if ($line =~ s/^-i (\S+)\s*//) {
1848             die "parameter -i not allowed\n" if !$allow_iface;
1849             $iface = $1;
1850             PVE::JSONSchema::pve_verify_iface($iface);
1851             next;
1852         }
1853
1854         last if $type eq 'group';
1855
1856         if ($line =~ s/^-p (\S+)\s*//) {
1857             $proto = $1;
1858             pve_fw_verify_protocol_spec($proto);
1859             next;
1860         }
1861         if ($line =~ s/^-dport (\S+)\s*//) {
1862             $dport = $1;
1863             parse_port_name_number_or_range($dport);
1864             next;
1865         }
1866         if ($line =~ s/^-sport (\S+)\s*//) {
1867             $sport = $1;
1868             parse_port_name_number_or_range($sport);
1869             next;
1870         }
1871         if ($line =~ s/^-source (\S+)\s*//) {
1872             $source = $1;
1873             parse_address_list($source);
1874             next;
1875         }
1876         if ($line =~ s/^-dest (\S+)\s*//) {
1877             $dest = $1;
1878             parse_address_list($dest);
1879             next;
1880         }
1881
1882         last;
1883     }
1884
1885     die "unable to parse rule parameters: $line\n" if length($line);
1886
1887     return {
1888         type => $type,
1889         enable => $enable,
1890         comment => $comment,
1891         action => $action,
1892         macro => $macro,
1893         iface => $iface,
1894         source => $source,
1895         dest => $dest,
1896         proto => $proto,
1897         dport => $dport,
1898         sport => $sport,
1899     };
1900 }
1901
1902 sub parse_vmfw_option {
1903     my ($line) = @_;
1904
1905     my ($opt, $value);
1906
1907     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1908
1909     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1910         $opt = lc($1);
1911         $value = int($2);
1912     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1913         $opt = lc($1);
1914         $value = $2 ? lc($3) : '';
1915     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1916         $opt = lc($1);
1917         $value = uc($3);
1918     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1919         $opt = lc($1);
1920         $value = $2;
1921     } else {
1922         chomp $line;
1923         die "can't parse option '$line'\n"
1924     }
1925
1926     return ($opt, $value);
1927 }
1928
1929 sub parse_hostfw_option {
1930     my ($line) = @_;
1931
1932     my ($opt, $value);
1933
1934     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1935
1936     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1937         $opt = lc($1);
1938         $value = int($2);
1939     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1940         $opt = lc($1);
1941         $value = $2 ? lc($3) : '';
1942     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1943         $opt = lc($1);
1944         $value = int($2);
1945     } else {
1946         chomp $line;
1947         die "can't parse option '$line'\n"
1948     }
1949
1950     return ($opt, $value);
1951 }
1952
1953 sub parse_clusterfw_option {
1954     my ($line) = @_;
1955
1956     my ($opt, $value);
1957
1958     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1959         $opt = lc($1);
1960         $value = int($2);
1961     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1962         $opt = lc($1);
1963         $value = uc($3);
1964     } else {
1965         chomp $line;
1966         die "can't parse option '$line'\n"
1967     }
1968
1969     return ($opt, $value);
1970 }
1971
1972 sub parse_clusterfw_alias {
1973     my ($line) = @_;
1974
1975     # we can add single line comments to the end of the line
1976     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1977
1978     if ($line =~ m/^(\S+)\s(\S+)$/) {
1979         my ($name, $cidr) = ($1, $2);
1980         $cidr =~ s|/32$||;
1981         pve_verify_ipv4_or_cidr($cidr);
1982         my $data = {
1983             name => $name,
1984             cidr => $cidr,
1985         };
1986         $data->{comment} = $comment  if $comment;
1987         return $data;
1988     }
1989
1990     return undef;
1991 }
1992
1993 sub parse_vm_fw_rules {
1994     my ($filename, $fh) = @_;
1995
1996     my $res = { rules => [], options => {}};
1997
1998     my $section;
1999
2000     while (defined(my $line = <$fh>)) {
2001         next if $line =~ m/^#/;
2002         next if $line =~ m/^\s*$/;
2003
2004         my $linenr = $fh->input_line_number();
2005         my $prefix = "$filename (line $linenr)";
2006
2007         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2008             $section = lc($1);
2009             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2010             next;
2011         }
2012         if (!$section) {
2013             warn "$prefix: skip line - no section";
2014             next;
2015         }
2016
2017         next if !$res->{$section}; # skip undefined section
2018
2019         if ($section eq 'options') {
2020             eval {
2021                 my ($opt, $value) = parse_vmfw_option($line);
2022                 $res->{options}->{$opt} = $value;
2023             };
2024             warn "$prefix: $@" if $@;
2025             next;
2026         }
2027
2028         my $rule;
2029         eval { $rule = parse_fw_rule($line, 1, 1); };
2030         if (my $err = $@) {
2031             warn "$prefix: $err";
2032             next;
2033         }
2034
2035         push @{$res->{$section}}, $rule;
2036     }
2037
2038     return $res;
2039 }
2040
2041 sub parse_host_fw_rules {
2042     my ($filename, $fh) = @_;
2043
2044     my $res = { rules => [], options => {}};
2045
2046     my $section;
2047
2048     while (defined(my $line = <$fh>)) {
2049         next if $line =~ m/^#/;
2050         next if $line =~ m/^\s*$/;
2051
2052         my $linenr = $fh->input_line_number();
2053         my $prefix = "$filename (line $linenr)";
2054
2055         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2056             $section = lc($1);
2057             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2058             next;
2059         }
2060         if (!$section) {
2061             warn "$prefix: skip line - no section";
2062             next;
2063         }
2064
2065         next if !$res->{$section}; # skip undefined section
2066
2067         if ($section eq 'options') {
2068             eval {
2069                 my ($opt, $value) = parse_hostfw_option($line);
2070                 $res->{options}->{$opt} = $value;
2071             };
2072             warn "$prefix: $@" if $@;
2073             next;
2074         }
2075
2076         my $rule;
2077         eval { $rule = parse_fw_rule($line, 1, 1); };
2078         if (my $err = $@) {
2079             warn "$prefix: $err";
2080             next;
2081         }
2082
2083         push @{$res->{$section}}, $rule;
2084     }
2085
2086     return $res;
2087 }
2088
2089 sub parse_cluster_fw_rules {
2090     my ($filename, $fh) = @_;
2091
2092     my $section;
2093     my $group;
2094
2095     my $res = {
2096         rules => [],
2097         options => {},
2098         aliases => {},
2099         groups => {},
2100         group_comments => {},
2101         ipset => {} ,
2102         ipset_comments => {},
2103     };
2104
2105     while (defined(my $line = <$fh>)) {
2106         next if $line =~ m/^#/;
2107         next if $line =~ m/^\s*$/;
2108
2109         my $linenr = $fh->input_line_number();
2110         my $prefix = "$filename (line $linenr)";
2111
2112         if ($line =~ m/^\[options\]$/i) {
2113             $section = 'options';
2114             next;
2115         }
2116
2117         if ($line =~ m/^\[aliases\]$/i) {
2118             $section = 'aliases';
2119             next;
2120         }
2121
2122         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2123             $section = 'groups';
2124             $group = lc($1);
2125             my $comment = $2;
2126             $res->{$section}->{$group} = [];
2127             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2128                 if $comment;
2129             next;
2130         }
2131
2132         if ($line =~ m/^\[rules\]$/i) {
2133             $section = 'rules';
2134             next;
2135         }
2136
2137         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2138             $section = 'ipset';
2139             $group = lc($1);
2140             my $comment = $2;
2141             $res->{$section}->{$group} = [];
2142             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2143                 if $comment;
2144             next;
2145         }
2146
2147         if (!$section) {
2148             warn "$prefix: skip line - no section\n";
2149             next;
2150         }
2151
2152         if ($section eq 'options') {
2153             eval {
2154                 my ($opt, $value) = parse_clusterfw_option($line);
2155                 $res->{options}->{$opt} = $value;
2156             };
2157             warn "$prefix: $@" if $@;
2158         } elsif ($section eq 'aliases') {
2159             eval {
2160                 my $data = parse_clusterfw_alias($line);
2161                 $res->{aliases}->{lc($data->{name})} = $data;
2162             };
2163             warn "$prefix: $@" if $@;
2164         } elsif ($section eq 'rules') {
2165             my $rule;
2166             eval { $rule = parse_fw_rule($line, 1, 1); };
2167             if (my $err = $@) {
2168                 warn "$prefix: $err";
2169                 next;
2170             }
2171             push @{$res->{$section}}, $rule;
2172         } elsif ($section eq 'groups') {
2173             my $rule;
2174             eval { $rule = parse_fw_rule($line, 0, 0); };
2175             if (my $err = $@) {
2176                 warn "$prefix: $err";
2177                 next;
2178             }
2179             push @{$res->{$section}->{$group}}, $rule;
2180         } elsif ($section eq 'ipset') {
2181             # we can add single line comments to the end of the rule
2182             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2183
2184             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2185             my $nomatch = $1;
2186             my $cidr = $2;
2187
2188             if($cidr !~ m/^${ip_alias_pattern}$/) {
2189                 $cidr =~ s|/32$||;
2190
2191                 eval { pve_verify_ipv4_or_cidr($cidr); };
2192                 if (my $err = $@) {
2193                     warn "$prefix: $cidr - $err";
2194                     next;
2195                 }
2196             }
2197
2198             my $entry = { cidr => $cidr };
2199             $entry->{nomatch} = 1 if $nomatch;
2200             $entry->{comment} = $comment if $comment;
2201
2202             push @{$res->{$section}->{$group}}, $entry;
2203         }
2204     }
2205
2206     return $res;
2207 }
2208
2209 sub run_locked {
2210     my ($code, @param) = @_;
2211
2212     my $timeout = 10;
2213
2214     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2215
2216     die $@ if $@;
2217
2218     return $res;
2219 }
2220
2221 sub read_local_vm_config {
2222
2223     my $openvz = {};
2224     my $qemu = {};
2225
2226     my $vmdata = { openvz => $openvz, qemu => $qemu };
2227
2228     my $vmlist = PVE::Cluster::get_vmlist();
2229     return $vmdata if !$vmlist || !$vmlist->{ids};
2230     my $ids = $vmlist->{ids};
2231
2232     foreach my $vmid (keys %$ids) {
2233         next if !$vmid; # skip VE0
2234         my $d = $ids->{$vmid};
2235         next if !$d->{node} || $d->{node} ne $nodename;
2236         next if !$d->{type};
2237         if ($d->{type} eq 'openvz') {
2238             if ($have_pve_manager) {
2239                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2240                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2241                     $openvz->{$vmid} = $conf;
2242                 }
2243             }
2244         } elsif ($d->{type} eq 'qemu') {
2245             if ($have_qemu_server) {
2246                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2247                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2248                     $qemu->{$vmid} = $conf;
2249                 }
2250             }
2251         }
2252     }
2253
2254     return $vmdata;
2255 };
2256
2257 sub load_vmfw_conf {
2258     my ($vmid, $dir) = @_;
2259
2260     my $vmfw_conf = {};
2261
2262     $dir = "/etc/pve/firewall" if !defined($dir);
2263
2264     my $filename = "$dir/$vmid.fw";
2265     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2266         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2267     }
2268
2269     return $vmfw_conf;
2270 }
2271
2272 my $format_rules = sub {
2273     my ($rules, $allow_iface) = @_;
2274
2275     my $raw = '';
2276
2277     foreach my $rule (@$rules) {
2278         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2279             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2280             $raw .= uc($rule->{type});
2281             if ($rule->{macro}) {
2282                 $raw .= " $rule->{macro}($rule->{action})";
2283             } else {
2284                 $raw .= " " . $rule->{action};
2285             }
2286             if ($allow_iface && $rule->{iface}) {
2287                 $raw .= " -i $rule->{iface}";
2288             }
2289
2290             if ($rule->{type} ne  'group')  {
2291                 $raw .= " -source $rule->{source}" if $rule->{source};
2292                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2293                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2294                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2295                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2296             }
2297
2298             $raw .= " # " . encode('utf8', $rule->{comment})
2299                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2300             $raw .= "\n";
2301         } else {
2302             die "unknown rule type '$rule->{type}'";
2303         }
2304     }
2305
2306     return $raw;
2307 };
2308
2309 my $format_options = sub {
2310     my ($options) = @_;
2311
2312     my $raw = '';
2313
2314     $raw .= "[OPTIONS]\n\n";
2315     foreach my $opt (keys %$options) {
2316         $raw .= "$opt: $options->{$opt}\n";
2317     }
2318     $raw .= "\n";
2319
2320     return $raw;
2321 };
2322
2323 my $format_aliases = sub {
2324     my ($aliases) = @_;
2325
2326     my $raw = '';
2327
2328     $raw .= "[ALIASES]\n\n";
2329     foreach my $k (keys %$aliases) {
2330         my $e = $aliases->{$k};
2331         $raw .= "$e->{name} $e->{cidr}";
2332         $raw .= " # " . encode('utf8', $e->{comment})
2333             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2334         $raw .= "\n";
2335     }
2336     $raw .= "\n";
2337
2338     return $raw;
2339 };
2340
2341 my $format_ipset = sub {
2342     my ($options) = @_;
2343
2344     my $raw = '';
2345
2346     my $nethash = {};
2347     foreach my $entry (@$options) {
2348         $nethash->{$entry->{cidr}} = $entry;
2349     }
2350
2351     foreach my $cidr (sort keys %$nethash) {
2352         my $entry = $nethash->{$cidr};
2353         my $line = $entry->{nomatch} ? '!' : '';
2354         $line .= $entry->{cidr};
2355         $line .= " # " . encode('utf8', $entry->{comment})
2356             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2357         $raw .= "$line\n";
2358     }
2359
2360     return $raw;
2361 };
2362
2363 sub save_vmfw_conf {
2364     my ($vmid, $vmfw_conf) = @_;
2365
2366     my $raw = '';
2367
2368     my $options = $vmfw_conf->{options};
2369     $raw .= &$format_options($options) if scalar(keys %$options);
2370
2371     my $rules = $vmfw_conf->{rules} || [];
2372     if (scalar(@$rules)) {
2373         $raw .= "[RULES]\n\n";
2374         $raw .= &$format_rules($rules, 1);
2375         $raw .= "\n";
2376     }
2377
2378     my $filename = "/etc/pve/firewall/$vmid.fw";
2379     PVE::Tools::file_set_contents($filename, $raw);
2380 }
2381
2382 sub read_vm_firewall_configs {
2383     my ($vmdata, $dir) = @_;
2384
2385     my $vmfw_configs = {};
2386
2387     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2388         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2389         next if !$vmfw_conf->{options}; # skip if file does not exists
2390         $vmfw_configs->{$vmid} = $vmfw_conf;
2391     }
2392
2393     return $vmfw_configs;
2394 }
2395
2396 sub get_option_log_level {
2397     my ($options, $k) = @_;
2398
2399     my $v = $options->{$k};
2400     $v = $default_log_level if !defined($v);
2401
2402     return undef if $v eq '' || $v eq 'nolog';
2403
2404     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2405
2406     return $v if ($v >= 0) && ($v <= 7);
2407
2408     warn "unknown log level ($k = '$v')\n";
2409
2410     return undef;
2411 }
2412
2413 sub generate_std_chains {
2414     my ($ruleset, $options) = @_;
2415
2416     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2417
2418     # same as shorewall smurflog.
2419     my $chain = 'PVEFW-smurflog';
2420     $pve_std_chains->{$chain} = [];
2421
2422     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2423     push @{$pve_std_chains->{$chain}}, "-j DROP";
2424
2425     # same as shorewall logflags action.
2426     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2427     $chain = 'PVEFW-logflags';
2428     $pve_std_chains->{$chain} = [];
2429
2430     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2431     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2432     push @{$pve_std_chains->{$chain}}, "-j DROP";
2433
2434     foreach my $chain (keys %$pve_std_chains) {
2435         ruleset_create_chain($ruleset, $chain);
2436         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2437             if (ref($rule)) {
2438                 ruleset_generate_rule($ruleset, $chain, $rule);
2439             } else {
2440                 ruleset_addrule($ruleset, $chain, $rule);
2441             }
2442         }
2443     }
2444 }
2445
2446 sub generate_ipset_chains {
2447     my ($ipset_ruleset, $fw_conf) = @_;
2448
2449     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2450         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2451     }
2452 }
2453
2454 sub generate_ipset {
2455     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2456
2457     my $hashsize = scalar(@$options);
2458     if ($hashsize <= 64) {
2459         $hashsize = 64;
2460     } else {
2461         $hashsize = round_powerof2($hashsize);
2462     }
2463
2464     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2465
2466     # remove duplicates
2467     my $nethash = {};
2468     foreach my $entry (@$options) {
2469         my $cidr = $entry->{cidr};
2470         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2471             my $alias = lc($cidr);
2472             if ($aliases->{$alias}) {
2473                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2474                 $nethash->{$entry->{cidr}} = $entry;
2475             } else {
2476                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2477             }
2478         } else {
2479             $nethash->{$entry->{cidr}} = $entry;
2480         }
2481     }
2482
2483     foreach my $cidr (sort keys %$nethash) {
2484         my $entry = $nethash->{$cidr};
2485
2486         my $cmd = "add $name $cidr";
2487         if ($entry->{nomatch}) {
2488             if ($feature_ipset_nomatch) {
2489                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2490             } else {
2491                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2492             }
2493         } else {
2494             push @{$ipset_ruleset->{$name}}, $cmd;
2495         }
2496     }
2497 }
2498
2499 sub round_powerof2 {
2500     my ($int) = @_;
2501
2502     $int--;
2503     $int |= $int >> $_ foreach (1,2,4,8,16);
2504     return ++$int;
2505 }
2506
2507 sub load_clusterfw_conf {
2508     my ($filename) = @_;
2509
2510     $filename = $clusterfw_conf_filename if !defined($filename);
2511
2512     my $cluster_conf = {};
2513     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2514         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2515     }
2516
2517     return $cluster_conf;
2518 }
2519
2520 sub save_clusterfw_conf {
2521     my ($cluster_conf) = @_;
2522
2523     my $raw = '';
2524
2525     my $options = $cluster_conf->{options};
2526     $raw .= &$format_options($options) if scalar(keys %$options);
2527
2528     my $aliases = $cluster_conf->{aliases};
2529     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2530
2531     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2532         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2533             my $utf8comment = encode('utf8', $comment);
2534             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2535         } else {
2536             $raw .= "[IPSET $ipset]\n\n";
2537         }
2538         my $options = $cluster_conf->{ipset}->{$ipset};
2539         $raw .= &$format_ipset($options);
2540         $raw .= "\n";
2541     }
2542
2543     my $rules = $cluster_conf->{rules};
2544     if (scalar(@$rules)) {
2545         $raw .= "[RULES]\n\n";
2546         $raw .= &$format_rules($rules, 1);
2547         $raw .= "\n";
2548     }
2549
2550     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2551         my $rules = $cluster_conf->{groups}->{$group};
2552         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2553             my $utf8comment = encode('utf8', $comment);
2554             $raw .= "[group $group] # $utf8comment\n\n";
2555         } else {
2556             $raw .= "[group $group]\n\n";
2557         }
2558
2559         $raw .= &$format_rules($rules, 0);
2560         $raw .= "\n";
2561     }
2562
2563     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2564 }
2565
2566 sub load_hostfw_conf {
2567     my ($filename) = @_;
2568
2569     $filename = $hostfw_conf_filename if !defined($filename);
2570
2571     my $hostfw_conf = {};
2572     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2573         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2574     }
2575     return $hostfw_conf;
2576 }
2577
2578 sub save_hostfw_conf {
2579     my ($hostfw_conf) = @_;
2580
2581     my $raw = '';
2582
2583     my $options = $hostfw_conf->{options};
2584     $raw .= &$format_options($options) if scalar(keys %$options);
2585
2586     my $rules = $hostfw_conf->{rules};
2587     if (scalar(@$rules)) {
2588         $raw .= "[RULES]\n\n";
2589         $raw .= &$format_rules($rules, 1);
2590         $raw .= "\n";
2591     }
2592
2593     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2594 }
2595
2596 sub compile {
2597     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2598
2599     my $vmfw_configs;
2600
2601     if ($vmdata) { # test mode
2602         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2603         my $filename = "$testdir/cluster.fw";
2604         die "missing test file '$filename'\n" if ! -f $filename;
2605         $cluster_conf = load_clusterfw_conf($filename);
2606
2607         $filename = "$testdir/host.fw";
2608         die "missing test file '$filename'\n" if ! -f $filename;
2609         $hostfw_conf = load_hostfw_conf($filename);
2610
2611         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2612     } else { # normal operation
2613         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2614
2615         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2616
2617         $vmdata = read_local_vm_config();
2618         $vmfw_configs = read_vm_firewall_configs($vmdata);
2619     }
2620
2621
2622     $cluster_conf->{ipset}->{venet0} = [];
2623
2624     my $ruleset = {};
2625
2626     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2627     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2628
2629     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2630
2631     my $hostfw_options = $hostfw_conf->{options} || {};
2632
2633     # fixme: what log level should we use here?
2634     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2635
2636     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2637
2638     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2639     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2640     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2641
2642     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2643     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2644
2645     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2646
2647     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2648     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2649
2650     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2651     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2652
2653     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2654
2655     generate_std_chains($ruleset, $hostfw_options);
2656
2657     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2658
2659     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2660
2661     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2662
2663     # generate firewall rules for QEMU VMs
2664     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2665         my $conf = $vmdata->{qemu}->{$vmid};
2666         my $vmfw_conf = $vmfw_configs->{$vmid};
2667         next if !$vmfw_conf;
2668         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2669
2670         foreach my $netid (keys %$conf) {
2671             next if $netid !~ m/^net(\d+)$/;
2672             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2673             next if !$net->{firewall};
2674             my $iface = "tap${vmid}i$1";
2675
2676             my $macaddr = $net->{macaddr};
2677             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2678                                          $vmfw_conf, $vmid, 'IN');
2679             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2680                                          $vmfw_conf, $vmid, 'OUT');
2681         }
2682     }
2683
2684     # generate firewall rules for OpenVZ containers
2685     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2686         my $conf = $vmdata->{openvz}->{$vmid};
2687
2688         my $vmfw_conf = $vmfw_configs->{$vmid};
2689         next if !$vmfw_conf;
2690         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2691
2692         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2693             my $ip = $conf->{ip_address}->{value};
2694             $ip =~ s/\s+/,/g;
2695             parse_address_list($ip); # make sure we have a valid $ip list
2696
2697             my @ips = split(',', $ip);
2698
2699             foreach my $singleip (@ips) {
2700                 my $venet0ipset = {};
2701                 $venet0ipset->{cidr} = $singleip;
2702                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2703             }
2704
2705             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2706             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2707         }
2708
2709         if ($conf->{netif} && $conf->{netif}->{value}) {
2710             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2711             foreach my $netid (keys %$netif) {
2712                 my $d = $netif->{$netid};
2713
2714                 my $macaddr = $d->{mac};
2715                 my $iface = $d->{host_ifname};
2716                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2717                                              $vmfw_conf, $vmid, 'IN');
2718                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2719                                              $vmfw_conf, $vmid, 'OUT');
2720             }
2721         }
2722     }
2723
2724     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2725         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2726     }
2727
2728     my $ipset_ruleset = {};
2729     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2730
2731     return ($ruleset, $ipset_ruleset);
2732 }
2733
2734 sub get_ruleset_status {
2735     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2736
2737     my $statushash = {};
2738
2739     foreach my $chain (sort keys %$ruleset) {
2740         my $sig = &$digest_fn($ruleset->{$chain});
2741
2742         $statushash->{$chain}->{sig} = $sig;
2743
2744         my $oldsig = $active_chains->{$chain};
2745         if (!defined($oldsig)) {
2746             $statushash->{$chain}->{action} = 'create';
2747         } else {
2748             if ($oldsig eq $sig) {
2749                 $statushash->{$chain}->{action} = 'exists';
2750             } else {
2751                 $statushash->{$chain}->{action} = 'update';
2752             }
2753         }
2754         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2755         foreach my $cmd (@{$ruleset->{$chain}}) {
2756             print "\t$cmd\n" if $verbose;
2757         }
2758     }
2759
2760     foreach my $chain (sort keys %$active_chains) {
2761         if (!defined($ruleset->{$chain})) {
2762             my $sig = $active_chains->{$chain};
2763             $statushash->{$chain}->{action} = 'delete';
2764             $statushash->{$chain}->{sig} = $sig;
2765             print "delete $chain ($sig)\n" if $verbose;
2766         }
2767     }
2768
2769     return $statushash;
2770 }
2771
2772 sub print_sig_rule {
2773     my ($chain, $sig) = @_;
2774
2775     # We just use this to store a SHA1 checksum used to detect changes
2776     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2777 }
2778
2779 sub get_ruleset_cmdlist {
2780     my ($ruleset, $verbose) = @_;
2781
2782     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2783
2784     my ($active_chains, $hooks) = iptables_get_chains();
2785     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2786
2787     # create missing chains first
2788     foreach my $chain (sort keys %$ruleset) {
2789         my $stat = $statushash->{$chain};
2790         die "internal error" if !$stat;
2791         next if $stat->{action} ne 'create';
2792
2793         $cmdlist .= ":$chain - [0:0]\n";
2794     }
2795
2796     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2797         if (!$hooks->{$h}) {
2798             $cmdlist .= "-A $h -j PVEFW-$h\n";
2799         }
2800     }
2801
2802     foreach my $chain (sort keys %$ruleset) {
2803         my $stat = $statushash->{$chain};
2804         die "internal error" if !$stat;
2805
2806         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2807             $cmdlist .= "-F $chain\n";
2808             foreach my $cmd (@{$ruleset->{$chain}}) {
2809                 $cmdlist .= "$cmd\n";
2810             }
2811             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2812         } elsif ($stat->{action} eq 'delete') {
2813             die "internal error"; # this should not happen
2814         } elsif ($stat->{action} eq 'exists') {
2815             # do nothing
2816         } else {
2817             die "internal error - unknown status '$stat->{action}'";
2818         }
2819     }
2820
2821     foreach my $chain (keys %$statushash) {
2822         next if $statushash->{$chain}->{action} ne 'delete';
2823         $cmdlist .= "-F $chain\n";
2824     }
2825     foreach my $chain (keys %$statushash) {
2826         next if $statushash->{$chain}->{action} ne 'delete';
2827         next if $chain eq 'PVEFW-INPUT';
2828         next if $chain eq 'PVEFW-OUTPUT';
2829         next if $chain eq 'PVEFW-FORWARD';
2830         $cmdlist .= "-X $chain\n";
2831     }
2832
2833     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2834
2835     $cmdlist .= "COMMIT\n";
2836
2837     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2838 }
2839
2840 sub get_ipset_cmdlist {
2841     my ($ruleset, $verbose) = @_;
2842
2843     my $cmdlist = "";
2844
2845     my $delete_cmdlist = "";
2846
2847     my $active_chains = ipset_get_chains();
2848     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2849
2850     # remove stale _swap chains
2851     foreach my $chain (keys %$active_chains) {
2852         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2853             $cmdlist .= "destroy $chain\n";
2854         }
2855     }
2856
2857     foreach my $chain (sort keys %$ruleset) {
2858         my $stat = $statushash->{$chain};
2859         die "internal error" if !$stat;
2860
2861         if ($stat->{action} eq 'create') {
2862             foreach my $cmd (@{$ruleset->{$chain}}) {
2863                 $cmdlist .= "$cmd\n";
2864             }
2865         }
2866
2867         if ($stat->{action} eq 'update') {
2868             my $chain_swap = $chain."_swap";
2869
2870             foreach my $cmd (@{$ruleset->{$chain}}) {
2871                 $cmd =~ s/$chain/$chain_swap/;
2872                 $cmdlist .= "$cmd\n";
2873             }
2874             $cmdlist .= "swap $chain_swap $chain\n";
2875             $cmdlist .= "flush $chain_swap\n";
2876             $cmdlist .= "destroy $chain_swap\n";
2877         }
2878
2879     }
2880
2881     foreach my $chain (keys %$statushash) {
2882         next if $statushash->{$chain}->{action} ne 'delete';
2883
2884         $delete_cmdlist .= "flush $chain\n";
2885         $delete_cmdlist .= "destroy $chain\n";
2886     }
2887
2888     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2889
2890     return ($cmdlist, $delete_cmdlist, $changes);
2891 }
2892
2893 sub apply_ruleset {
2894     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2895
2896     enable_bridge_firewall();
2897
2898     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2899         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2900
2901     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2902
2903     if ($verbose) {
2904         if ($ipset_changes) {
2905             print "ipset changes:\n";
2906             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2907             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2908         }
2909
2910         if ($changes) {
2911             print "iptables changes:\n";
2912             print $cmdlist;
2913         }
2914     }
2915
2916     ipset_restore_cmdlist($ipset_create_cmdlist);
2917
2918     iptables_restore_cmdlist($cmdlist);
2919
2920     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2921
2922     # test: re-read status and check if everything is up to date
2923     my $active_chains = iptables_get_chains();
2924     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2925
2926     my $errors;
2927     foreach my $chain (sort keys %$ruleset) {
2928         my $stat = $statushash->{$chain};
2929         if ($stat->{action} ne 'exists') {
2930             warn "unable to update chain '$chain'\n";
2931             $errors = 1;
2932         }
2933     }
2934
2935     die "unable to apply firewall changes\n" if $errors;
2936
2937     update_nf_conntrack_max($hostfw_conf);
2938
2939     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2940
2941 }
2942
2943 sub update_nf_conntrack_max {
2944     my ($hostfw_conf) = @_;
2945
2946     my $max = 65536; # reasonable default
2947
2948     my $options = $hostfw_conf->{options} || {};
2949
2950     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2951         $max = $options->{nf_conntrack_max};
2952         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2953     }
2954
2955     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2956     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2957
2958     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2959
2960     if ($current != $max) {
2961         my $hashsize = int($max/4);
2962         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2963         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2964     }
2965 }
2966
2967 sub update_nf_conntrack_tcp_timeout_established {
2968     my ($hostfw_conf) = @_;
2969
2970     my $options = $hostfw_conf->{options} || {};
2971
2972     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2973
2974     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2975 }
2976
2977 sub remove_pvefw_chains {
2978
2979     my ($chash, $hooks) = iptables_get_chains();
2980     my $cmdlist = "*filter\n";
2981
2982     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2983         if ($hooks->{$h}) {
2984             $cmdlist .= "-D $h -j PVEFW-$h\n";
2985         }
2986     }
2987
2988     foreach my $chain (keys %$chash) {
2989         $cmdlist .= "-F $chain\n";
2990     }
2991
2992     foreach my $chain (keys %$chash) {
2993         $cmdlist .= "-X $chain\n";
2994     }
2995     $cmdlist .= "COMMIT\n";
2996
2997     iptables_restore_cmdlist($cmdlist);
2998 }
2999
3000 sub init {
3001     my $cluster_conf = load_clusterfw_conf();
3002     my $cluster_options = $cluster_conf->{options};
3003     my $enable = $cluster_options->{enable};
3004
3005     return if !$enable;
3006
3007     # load required modules here
3008 }
3009
3010 sub update {
3011     my ($verbose) = @_;
3012
3013     my $code = sub {
3014
3015         my $cluster_conf = load_clusterfw_conf();
3016         my $cluster_options = $cluster_conf->{options};
3017
3018         my $enable = $cluster_options->{enable};
3019
3020         die "Firewall is disabled - cannot start\n" if !$enable;
3021
3022         if (!$enable) {
3023             PVE::Firewall::remove_pvefw_chains();
3024             print "Firewall disabled\n" if $verbose;
3025             return;
3026         }
3027
3028         my $hostfw_conf = load_hostfw_conf();
3029
3030         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3031
3032         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
3033     };
3034
3035     run_locked($code);
3036 }
3037
3038 1;