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 $pvefw_conf_dir = "/etc/pve/firewall";
  23 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  24
  25 # dynamically include PVE::QemuServer and PVE::OpenVZ
  26 # to avoid dependency problems
  27 my $have_qemu_server;
  28 eval {
  29     require PVE::QemuServer;
  30     $have_qemu_server = 1;
  31 };
  32
  33 my $have_pve_manager;
  34 eval {
  35     require PVE::OpenVZ;
  36     $have_pve_manager = 1;
  37 };
  38
  39 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  40 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  42
  43 my $max_alias_name_length = 64;
  44 my $max_ipset_name_length = 64;
  45 my $max_group_name_length = 20;
  46
  47 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  48 sub pve_verify_ipv4_or_cidr {
  49     my ($cidr, $noerr) = @_;
  50
  51     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  52         return $cidr if Net::IP->new($cidr);
  53         return undef if $noerr;
  54         die Net::IP::Error() . "\n";
  55     }
  56     return undef if $noerr;
  57     die "value does not look like a valid IP address or CIDR network\n";
  58 }
  59
  60 PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
  61 sub pve_verify_ipv4_or_cidr_or_alias {
  62     my ($cidr, $noerr) = @_;
  63
  64     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  65
  66     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  67         return $cidr if Net::IP->new($cidr);
  68         return undef if $noerr;
  69         die Net::IP::Error() . "\n";
  70     }
  71     return undef if $noerr;
  72     die "value does not look like a valid IP address or CIDR network\n";
  73 }
  74
  75 PVE::JSONSchema::register_standard_option('ipset-name', {
  76     description => "IP set name.",
  77     type => 'string',
  78     pattern => $ipset_name_pattern,
  79     minLength => 2,
  80     maxLength => $max_ipset_name_length,
  81 });
  82
  83 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  84     description => "Alias name.",
  85     type => 'string',
  86     pattern => $ip_alias_pattern,
  87     minLength => 2,
  88     maxLength => $max_alias_name_length,
  89 });
  90
  91 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  92     description => "Log level.",
  93     type => 'string',
  94     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  95     optional => 1,
  96 });
  97
  98 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  99     description => "Security Group name.",
 100     type => 'string',
 101     pattern => $security_group_name_pattern,
 102     minLength => 2,
 103     maxLength => $max_group_name_length,
 104 });
 105
 106 my $feature_ipset_nomatch = 0;
 107 eval  {
 108     my (undef, undef, $release) = POSIX::uname();
 109     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 110         my ($major, $minor) = ($1, $2);
 111         $feature_ipset_nomatch = 1 if ($major > 3) ||
 112             ($major == 3 && $minor >= 7);
 113     }
 114
 115 };
 116
 117 use Data::Dumper;
 118
 119 my $nodename = PVE::INotify::nodename();
 120
 121 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 122
 123 my $default_log_level = 'nolog'; # avoid logs by default
 124
 125 my $log_level_hash = {
 126     debug => 7,
 127     info => 6,
 128     notice => 5,
 129     warning => 4,
 130     err => 3,
 131     crit => 2,
 132     alert => 1,
 133     emerg => 0,
 134 };
 135
 136 # imported/converted from: /usr/share/shorewall/macro.*
 137 my $pve_fw_macros = {
 138     'Amanda' => [
 139         "Amanda Backup",
 140         { action => 'PARAM', proto => 'udp', dport => '10080' },
 141         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 142     ],
 143     'Auth' => [
 144         "Auth (identd) traffic",
 145         { action => 'PARAM', proto => 'tcp', dport => '113' },
 146     ],
 147     'BGP' => [
 148         "Border Gateway Protocol traffic",
 149         { action => 'PARAM', proto => 'tcp', dport => '179' },
 150     ],
 151     'BitTorrent' => [
 152         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 153         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 154         { action => 'PARAM', proto => 'udp', dport => '6881' },
 155     ],
 156     'BitTorrent32' => [
 157         "BitTorrent traffic for BitTorrent 3.2 and later",
 158         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 159         { action => 'PARAM', proto => 'udp', dport => '6881' },
 160     ],
 161     'CVS' => [
 162         "Concurrent Versions System pserver traffic",
 163         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 164     ],
 165     'Citrix' => [
 166         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 167         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 168         { action => 'PARAM', proto => 'udp', dport => '1604' },
 169         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 170     ],
 171     'DAAP' => [
 172         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 173         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 174         { action => 'PARAM', proto => 'udp', dport => '3689' },
 175     ],
 176     'DCC' => [
 177         "Distributed Checksum Clearinghouse spam filtering mechanism",
 178         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 179     ],
 180     'DHCPfwd' => [
 181         "Forwarded DHCP traffic",
 182         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 183     ],
 184     'DNS' => [
 185         "Domain Name System traffic (upd and tcp)",
 186         { action => 'PARAM', proto => 'udp', dport => '53' },
 187         { action => 'PARAM', proto => 'tcp', dport => '53' },
 188     ],
 189     'Distcc' => [
 190         "Distributed Compiler service",
 191         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 192     ],
 193     'FTP' => [
 194         "File Transfer Protocol",
 195         { action => 'PARAM', proto => 'tcp', dport => '21' },
 196     ],
 197     'Finger' => [
 198         "Finger protocol (RFC 742)",
 199         { action => 'PARAM', proto => 'tcp', dport => '79' },
 200     ],
 201     'GNUnet' => [
 202         "GNUnet secure peer-to-peer networking traffic",
 203         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 204         { action => 'PARAM', proto => 'udp', dport => '2086' },
 205         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 206         { action => 'PARAM', proto => 'udp', dport => '1080' },
 207     ],
 208     'GRE' => [
 209         "Generic Routing Encapsulation tunneling protocol",
 210         { action => 'PARAM', proto => '47' },
 211     ],
 212     'Git' => [
 213         "Git distributed revision control traffic",
 214         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 215     ],
 216     'HKP' => [
 217         "OpenPGP HTTP keyserver protocol traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 219     ],
 220     'HTTP' => [
 221         "Hypertext Transfer Protocol (WWW)",
 222         { action => 'PARAM', proto => 'tcp', dport => '80' },
 223     ],
 224     'HTTPS' => [
 225         "Hypertext Transfer Protocol (WWW) over SSL",
 226         { action => 'PARAM', proto => 'tcp', dport => '443' },
 227     ],
 228     'ICPV2' => [
 229         "Internet Cache Protocol V2 (Squid) traffic",
 230         { action => 'PARAM', proto => 'udp', dport => '3130' },
 231     ],
 232     'ICQ' => [
 233         "AOL Instant Messenger traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 235     ],
 236     'IMAP' => [
 237         "Internet Message Access Protocol",
 238         { action => 'PARAM', proto => 'tcp', dport => '143' },
 239     ],
 240     'IMAPS' => [
 241         "Internet Message Access Protocol over SSL",
 242         { action => 'PARAM', proto => 'tcp', dport => '993' },
 243     ],
 244     'IPIP' => [
 245         "IPIP capsulation traffic",
 246         { action => 'PARAM', proto => '94' },
 247     ],
 248     'IPsec' => [
 249         "IPsec traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 251         { action => 'PARAM', proto => '50' },
 252     ],
 253     'IPsecah' => [
 254         "IPsec authentication (AH) traffic",
 255         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 256         { action => 'PARAM', proto => '51' },
 257     ],
 258     'IPsecnat' => [
 259         "IPsec traffic and Nat-Traversal",
 260         { action => 'PARAM', proto => 'udp', dport => '500' },
 261         { action => 'PARAM', proto => 'udp', dport => '4500' },
 262         { action => 'PARAM', proto => '50' },
 263     ],
 264     'IRC' => [
 265         "Internet Relay Chat traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 267     ],
 268     'Jetdirect' => [
 269         "HP Jetdirect printing",
 270         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 271     ],
 272     'L2TP' => [
 273         "Layer 2 Tunneling Protocol traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '1701' },
 275     ],
 276     'LDAP' => [
 277         "Lightweight Directory Access Protocol traffic",
 278         { action => 'PARAM', proto => 'tcp', dport => '389' },
 279     ],
 280     'LDAPS' => [
 281         "Secure Lightweight Directory Access Protocol traffic",
 282         { action => 'PARAM', proto => 'tcp', dport => '636' },
 283     ],
 284     'MSNP' => [
 285         "Microsoft Notification Protocol",
 286         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 287     ],
 288     'MSSQL' => [
 289         "Microsoft SQL Server",
 290         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 291     ],
 292     'Mail' => [
 293         "Mail traffic (SMTP, SMTPS, Submission)",
 294         { action => 'PARAM', proto => 'tcp', dport => '25' },
 295         { action => 'PARAM', proto => 'tcp', dport => '465' },
 296         { action => 'PARAM', proto => 'tcp', dport => '587' },
 297     ],
 298     'Munin' => [
 299         "Munin networked resource monitoring traffic",
 300         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 301     ],
 302     'MySQL' => [
 303         "MySQL server",
 304         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 305     ],
 306     'NNTP' => [
 307         "NNTP traffic (Usenet).",
 308         { action => 'PARAM', proto => 'tcp', dport => '119' },
 309     ],
 310     'NNTPS' => [
 311         "Encrypted NNTP traffic (Usenet)",
 312         { action => 'PARAM', proto => 'tcp', dport => '563' },
 313     ],
 314     'NTP' => [
 315         "Network Time Protocol (ntpd)",
 316         { action => 'PARAM', proto => 'udp', dport => '123' },
 317     ],
 318     'OSPF' => [
 319         "OSPF multicast traffic",
 320         { action => 'PARAM', proto => '89' },
 321     ],
 322     'OpenVPN' => [
 323         "OpenVPN traffic",
 324         { action => 'PARAM', proto => 'udp', dport => '1194' },
 325     ],
 326     'PCA' => [
 327         "Symantec PCAnywere (tm)",
 328         { action => 'PARAM', proto => 'udp', dport => '5632' },
 329         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 330     ],
 331     'POP3' => [
 332         "POP3 traffic",
 333         { action => 'PARAM', proto => 'tcp', dport => '110' },
 334     ],
 335     'POP3S' => [
 336         "Encrypted POP3 traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '995' },
 338     ],
 339     'PPtP' => [
 340         "Point-to-Point Tunneling Protocol",
 341         { action => 'PARAM', proto => '47' },
 342         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 343     ],
 344     'Ping' => [
 345         "ICMP echo request",
 346         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 347     ],
 348     'PostgreSQL' => [
 349         "PostgreSQL server",
 350         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 351     ],
 352     'Printer' => [
 353         "Line Printer protocol printing",
 354         { action => 'PARAM', proto => 'tcp', dport => '515' },
 355     ],
 356     'RDP' => [
 357         "Microsoft Remote Desktop Protocol traffic",
 358         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 359     ],
 360     'RIP' => [
 361         "Routing Information Protocol (bidirectional)",
 362         { action => 'PARAM', proto => 'udp', dport => '520' },
 363     ],
 364     'RNDC' => [
 365         "BIND remote management protocol",
 366         { action => 'PARAM', proto => 'tcp', dport => '953' },
 367     ],
 368     'Razor' => [
 369         "Razor Antispam System",
 370         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 371     ],
 372     'Rdate' => [
 373         "Remote time retrieval (rdate)",
 374         { action => 'PARAM', proto => 'tcp', dport => '37' },
 375     ],
 376     'Rsync' => [
 377         "Rsync server",
 378         { action => 'PARAM', proto => 'tcp', dport => '873' },
 379     ],
 380     'SANE' => [
 381         "SANE network scanning",
 382         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 383     ],
 384     'SMB' => [
 385         "Microsoft SMB traffic",
 386         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 387         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 388         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 389         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 390     ],
 391     'SMBswat' => [
 392         "Samba Web Administration Tool",
 393         { action => 'PARAM', proto => 'tcp', dport => '901' },
 394     ],
 395     'SMTP' => [
 396         "Simple Mail Transfer Protocol",
 397         { action => 'PARAM', proto => 'tcp', dport => '25' },
 398     ],
 399     'SMTPS' => [
 400         "Encrypted Simple Mail Transfer Protocol",
 401         { action => 'PARAM', proto => 'tcp', dport => '465' },
 402     ],
 403     'SNMP' => [
 404         "Simple Network Management Protocol",
 405         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 406         { action => 'PARAM', proto => 'tcp', dport => '161' },
 407     ],
 408     'SPAMD' => [
 409         "Spam Assassin SPAMD traffic",
 410         { action => 'PARAM', proto => 'tcp', dport => '783' },
 411     ],
 412     'SSH' => [
 413         "Secure shell traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '22' },
 415     ],
 416     'SVN' => [
 417         "Subversion server (svnserve)",
 418         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 419     ],
 420     'SixXS' => [
 421         "SixXS IPv6 Deployment and Tunnel Broker",
 422         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 423         { action => 'PARAM', proto => 'udp', dport => '3740' },
 424         { action => 'PARAM', proto => '41' },
 425         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 426     ],
 427     'Squid' => [
 428         "Squid web proxy traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 430     ],
 431     'Submission' => [
 432         "Mail message submission traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '587' },
 434     ],
 435     'Syslog' => [
 436         "Syslog protocol (RFC 5424) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '514' },
 438         { action => 'PARAM', proto => 'tcp', dport => '514' },
 439     ],
 440     'TFTP' => [
 441         "Trivial File Transfer Protocol traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '69' },
 443     ],
 444     'Telnet' => [
 445         "Telnet traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '23' },
 447     ],
 448     'Telnets' => [
 449         "Telnet over SSL",
 450         { action => 'PARAM', proto => 'tcp', dport => '992' },
 451     ],
 452     'Time' => [
 453         "RFC 868 Time protocol",
 454         { action => 'PARAM', proto => 'tcp', dport => '37' },
 455     ],
 456     'Trcrt' => [
 457         "Traceroute (for up to 30 hops) traffic",
 458         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 459         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 460     ],
 461     'VNC' => [
 462         "VNC traffic for VNC display's 0 - 99",
 463         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 464     ],
 465     'VNCL' => [
 466         "VNC traffic from Vncservers to Vncviewers in listen mode",
 467         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 468     ],
 469     'Web' => [
 470         "WWW traffic (HTTP and HTTPS)",
 471         { action => 'PARAM', proto => 'tcp', dport => '80' },
 472         { action => 'PARAM', proto => 'tcp', dport => '443' },
 473     ],
 474     'Webcache' => [
 475         "Web Cache/Proxy traffic (port 8080)",
 476         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 477     ],
 478     'Webmin' => [
 479         "Webmin traffic",
 480         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 481     ],
 482     'Whois' => [
 483         "Whois (nicname, RFC 3912) traffic",
 484         { action => 'PARAM', proto => 'tcp', dport => '43' },
 485     ],
 486 };
 487
 488 my $pve_fw_parsed_macros;
 489 my $pve_fw_macro_descr;
 490 my $pve_fw_preferred_macro_names = {};
 491
 492 my $pve_std_chains = {};
 493 $pve_std_chains->{4} = {
 494     'PVEFW-SET-ACCEPT-MARK' => [
 495         "-j MARK --set-mark 1",
 496     ],
 497     'PVEFW-DropBroadcast' => [
 498         # same as shorewall 'Broadcast'
 499         # simply DROP BROADCAST/MULTICAST/ANYCAST
 500         # we can use this to reduce logging
 501         { action => 'DROP', dsttype => 'BROADCAST' },
 502         { action => 'DROP', dsttype => 'MULTICAST' },
 503         { action => 'DROP', dsttype => 'ANYCAST' },
 504         { action => 'DROP', dest => '224.0.0.0/4' },
 505     ],
 506     'PVEFW-reject' => [
 507         # same as shorewall 'reject'
 508         { action => 'DROP', dsttype => 'BROADCAST' },
 509         { action => 'DROP', source => '224.0.0.0/4' },
 510         { action => 'DROP', proto => 'icmp' },
 511         "-p tcp -j REJECT --reject-with tcp-reset",
 512         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 513         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 514         "-j REJECT --reject-with icmp-host-prohibited",
 515     ],
 516     'PVEFW-Drop' => [
 517         # same as shorewall 'Drop', which is equal to DROP,
 518         # but REJECT/DROP some packages to reduce logging,
 519         # and ACCEPT critical ICMP types
 520         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 521         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 522         { action => 'PVEFW-DropBroadcast' },
 523         # ACCEPT critical ICMP types
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 526         # Drop packets with INVALID state
 527         "-m conntrack --ctstate INVALID -j DROP",
 528         # Drop Microsoft SMB noise
 529         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 530         { action => 'DROP', proto => 'udp', dport => '137:139'},
 531         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 532         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 533         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 534         # Drop new/NotSyn traffic so that it doesn't get logged
 535         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 536         # Drop DNS replies
 537         { action => 'DROP', proto => 'udp', sport => 53 },
 538     ],
 539     'PVEFW-Reject' => [
 540         # same as shorewall 'Reject', which is equal to Reject,
 541         # but REJECT/DROP some packages to reduce logging,
 542         # and ACCEPT critical ICMP types
 543         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 544         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 545         { action => 'PVEFW-DropBroadcast' },
 546         # ACCEPT critical ICMP types
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 548         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 549         # Drop packets with INVALID state
 550         "-m conntrack --ctstate INVALID -j DROP",
 551         # Drop Microsoft SMB noise
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 554         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 555         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 556         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 557         # Drop new/NotSyn traffic so that it doesn't get logged
 558         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 559         # Drop DNS replies
 560         { action => 'DROP', proto => 'udp', sport => 53 },
 561     ],
 562     'PVEFW-tcpflags' => [
 563         # same as shorewall tcpflags action.
 564         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 568         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 569         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 570     ],
 571     'PVEFW-smurfs' => [
 572         # same as shorewall smurfs action
 573         # Filter packets for smurfs (packets with a broadcast address as the source).
 574         "-s 0.0.0.0/32 -j RETURN",
 575         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 576         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 577     ],
 578 };
 579
 580 # iptables -p icmp -h
 581 my $icmp_type_names = {
 582     any => 1,
 583     'echo-reply' => 1,
 584     'destination-unreachable' => 1,
 585     'network-unreachable' => 1,
 586     'host-unreachable' => 1,
 587     'protocol-unreachable' => 1,
 588     'port-unreachable' => 1,
 589     'fragmentation-needed' => 1,
 590     'source-route-failed' => 1,
 591     'network-unknown' => 1,
 592     'host-unknown' => 1,
 593     'network-prohibited' => 1,
 594     'host-prohibited' => 1,
 595     'TOS-network-unreachable' => 1,
 596     'TOS-host-unreachable' => 1,
 597     'communication-prohibited' => 1,
 598     'host-precedence-violation' => 1,
 599     'precedence-cutoff' => 1,
 600     'source-quench' => 1,
 601     'redirect' => 1,
 602     'network-redirect' => 1,
 603     'host-redirect' => 1,
 604     'TOS-network-redirect' => 1,
 605     'TOS-host-redirect' => 1,
 606     'echo-request' => 1,
 607     'router-advertisement' => 1,
 608     'router-solicitation' => 1,
 609     'time-exceeded' => 1,
 610     'ttl-zero-during-transit' => 1,
 611     'ttl-zero-during-reassembly' => 1,
 612     'parameter-problem' => 1,
 613     'ip-header-bad' => 1,
 614     'required-option-missing' => 1,
 615     'timestamp-request' => 1,
 616     'timestamp-reply' => 1,
 617     'address-mask-request' => 1,
 618     'address-mask-reply' => 1,
 619 };
 620
 621 sub init_firewall_macros {
 622
 623     $pve_fw_parsed_macros = {};
 624
 625     foreach my $k (keys %$pve_fw_macros) {
 626         my $lc_name = lc($k);
 627         my $macro = $pve_fw_macros->{$k};
 628         if (!ref($macro->[0])) {
 629             $pve_fw_macro_descr->{$k} = shift @$macro;
 630         }
 631         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 632         $pve_fw_parsed_macros->{$k} = $macro;
 633     }
 634 }
 635
 636 init_firewall_macros();
 637
 638 sub get_macros {
 639     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 640 }
 641
 642 my $etc_services;
 643
 644 sub get_etc_services {
 645
 646     return $etc_services if $etc_services;
 647
 648     my $filename = "/etc/services";
 649
 650     my $fh = IO::File->new($filename, O_RDONLY);
 651     if (!$fh) {
 652         warn "unable to read '$filename' - $!\n";
 653         return {};
 654     }
 655
 656     my $services = {};
 657
 658     while (my $line = <$fh>) {
 659         chomp ($line);
 660         next if $line =~m/^#/;
 661         next if ($line =~m/^\s*$/);
 662
 663         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 664             $services->{byid}->{$2}->{name} = $1;
 665             $services->{byid}->{$2}->{port} = $2;
 666             $services->{byid}->{$2}->{$3} = 1;
 667             $services->{byname}->{$1} = $services->{byid}->{$2};
 668         }
 669     }
 670
 671     close($fh);
 672
 673     $etc_services = $services;
 674
 675
 676     return $etc_services;
 677 }
 678
 679 my $etc_protocols;
 680
 681 sub get_etc_protocols {
 682     return $etc_protocols if $etc_protocols;
 683
 684     my $filename = "/etc/protocols";
 685
 686     my $fh = IO::File->new($filename, O_RDONLY);
 687     if (!$fh) {
 688         warn "unable to read '$filename' - $!\n";
 689         return {};
 690     }
 691
 692     my $protocols = {};
 693
 694     while (my $line = <$fh>) {
 695         chomp ($line);
 696         next if $line =~m/^#/;
 697         next if ($line =~m/^\s*$/);
 698
 699         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 700             $protocols->{byid}->{$2}->{name} = $1;
 701             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 702         }
 703     }
 704
 705     close($fh);
 706
 707     $etc_protocols = $protocols;
 708
 709     return $etc_protocols;
 710 }
 711
 712 my $ipv4_mask_hash_localnet = {
 713     '255.255.0.0' => 16,
 714     '255.255.128.0' => 17,
 715     '255.255.192.0' => 18,
 716     '255.255.224.0' => 19,
 717     '255.255.240.0' => 20,
 718     '255.255.248.0' => 21,
 719     '255.255.252.0' => 22,
 720     '255.255.254.0' => 23,
 721     '255.255.255.0' => 24,
 722     '255.255.255.128' => 25,
 723     '255.255.255.192' => 26,
 724     '255.255.255.224' => 27,
 725     '255.255.255.240' => 28,
 726     '255.255.255.248' => 29,
 727     '255.255.255.252' => 30,
 728 };
 729
 730 my $__local_network;
 731
 732 sub local_network {
 733     my ($new_value) = @_;
 734
 735     $__local_network = $new_value if defined($new_value);
 736
 737     return $__local_network if defined($__local_network);
 738
 739     eval {
 740         my $nodename = PVE::INotify::nodename();
 741
 742         my $ip = PVE::Cluster::remote_node_ip($nodename);
 743
 744         my $testip = Net::IP->new($ip);
 745
 746         my $routes = PVE::ProcFSTools::read_proc_net_route();
 747         foreach my $entry (@$routes) {
 748             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 749             next if !defined($mask);
 750             return if $mask eq '0.0.0.0';
 751             my $cidr = "$entry->{dest}/$mask";
 752             my $testnet = Net::IP->new($cidr);
 753             if ($testnet->overlaps($testip)) {
 754                 $__local_network = $cidr;
 755                 return;
 756             }
 757         }
 758     };
 759     warn $@ if $@;
 760
 761     return $__local_network;
 762 }
 763
 764 # ipset names are limited to 31 characters, and we use '_swap'
 765 # suffix for atomic update, for example PVEFW-${VMID}-${ipset_name}_swap
 766
 767 my $max_iptables_ipset_name_length = 31 - length("_swap");
 768
 769 sub compute_ipset_chain_name {
 770     my ($vmid, $ipset_name) = @_;
 771
 772     $vmid = 0 if !defined($vmid);
 773
 774     my $id = "$vmid-${ipset_name}";
 775
 776
 777     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 778         $id = PVE::Tools::fnv31a_hex($id);
 779     }
 780
 781     return "PVEFW-$id";
 782 }
 783
 784 sub compute_ipfilter_ipset_name {
 785     my ($iface) = @_;
 786
 787     return "ipfilter-$iface";
 788 }
 789
 790 sub parse_address_list {
 791     my ($str) = @_;
 792
 793     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 794         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 795         return;
 796     }
 797
 798     if ($str =~ m/^${ip_alias_pattern}$/) {
 799         die "alias name too long\n" if length($str) > $max_alias_name_length;
 800         return;
 801     }
 802
 803     my $count = 0;
 804     my $iprange = 0;
 805     my $ipversion;
 806
 807     foreach my $elem (split(/,/, $str)) {
 808         $count++;
 809         if (!Net::IP->new($elem)) {
 810             my $err = Net::IP::Error();
 811             die "invalid IP address: $err\n";
 812         }
 813         $iprange = 1 if $elem =~ m/-/;
 814
 815         my $new_ipversion = Net::IP::ip_get_version($elem); #fixme : don't work with range
 816
 817         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 818             if defined($ipversion) && ($new_ipversion != $ipversion);
 819
 820         $ipversion = $new_ipversion;
 821     }
 822
 823     die "you can't use a range in a list\n" if $iprange && $count > 1;
 824
 825     return $ipversion;
 826 }
 827
 828 sub parse_port_name_number_or_range {
 829     my ($str) = @_;
 830
 831     my $services = PVE::Firewall::get_etc_services();
 832     my $count = 0;
 833     my $icmp_port = 0;
 834
 835     foreach my $item (split(/,/, $str)) {
 836         $count++;
 837         if ($item =~ m/^(\d+):(\d+)$/) {
 838             my ($port1, $port2) = ($1, $2);
 839             die "invalid port '$port1'\n" if $port1 > 65535;
 840             die "invalid port '$port2'\n" if $port2 > 65535;
 841         } elsif ($item =~ m/^(\d+)$/) {
 842             my $port = $1;
 843             die "invalid port '$port'\n" if $port > 65535;
 844         } else {
 845             if ($icmp_type_names->{$item}) {
 846                 $icmp_port = 1;
 847             } else {
 848                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 849             }
 850         }
 851     }
 852
 853     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 854
 855     return $count;
 856 }
 857
 858 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 859 sub pve_fw_verify_port_spec {
 860    my ($portstr) = @_;
 861
 862    parse_port_name_number_or_range($portstr);
 863
 864    return $portstr;
 865 }
 866
 867 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 868 sub pve_fw_verify_addr_spec {
 869    my ($list) = @_;
 870
 871    parse_address_list($list);
 872
 873    return $list;
 874 }
 875
 876 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 877 sub pve_fw_verify_protocol_spec {
 878    my ($proto) = @_;
 879
 880    my $protocols = get_etc_protocols();
 881
 882    die "unknown protocol '$proto'\n" if $proto &&
 883        !(defined($protocols->{byname}->{$proto}) ||
 884          defined($protocols->{byid}->{$proto}));
 885
 886    return $proto;
 887 }
 888
 889
 890 # helper function for API
 891
 892 sub copy_opject_with_digest {
 893     my ($object) = @_;
 894
 895     my $sha = Digest::SHA->new('sha1');
 896
 897     my $res = {};
 898     foreach my $k (sort keys %$object) {
 899         my $v = $object->{$k};
 900         next if !defined($v);
 901         $res->{$k} = $v;
 902         $sha->add($k, ':', $v, "\n");
 903     }
 904
 905     my $digest = $sha->hexdigest;
 906
 907     $res->{digest} = $digest;
 908
 909     return wantarray ? ($res, $digest) : $res;
 910 }
 911
 912 sub copy_list_with_digest {
 913     my ($list) = @_;
 914
 915     my $sha = Digest::SHA->new('sha1');
 916
 917     my $res = [];
 918     foreach my $entry (@$list) {
 919         my $data = {};
 920         foreach my $k (sort keys %$entry) {
 921             my $v = $entry->{$k};
 922             next if !defined($v);
 923             $data->{$k} = $v;
 924             # Note: digest ignores refs ($rule->{errors})
 925             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 926         }
 927         push @$res, $data;
 928     }
 929
 930     my $digest = $sha->hexdigest;
 931
 932     foreach my $entry (@$res) {
 933         $entry->{digest} = $digest;
 934     }
 935
 936     return wantarray ? ($res, $digest) : $res;
 937 }
 938
 939 my $rule_properties = {
 940     pos => {
 941         description => "Update rule at position <pos>.",
 942         type => 'integer',
 943         minimum => 0,
 944         optional => 1,
 945     },
 946     digest => get_standard_option('pve-config-digest'),
 947     type => {
 948         type => 'string',
 949         optional => 1,
 950         enum => ['in', 'out', 'group'],
 951     },
 952     action => {
 953         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 954         type => 'string',
 955         optional => 1,
 956         pattern => $security_group_name_pattern,
 957         maxLength => 20,
 958         minLength => 2,
 959     },
 960     macro => {
 961         type => 'string',
 962         optional => 1,
 963         maxLength => 128,
 964     },
 965     iface => get_standard_option('pve-iface', { optional => 1 }),
 966     source => {
 967         type => 'string', format => 'pve-fw-addr-spec',
 968         optional => 1,
 969     },
 970     dest => {
 971         type => 'string', format => 'pve-fw-addr-spec',
 972         optional => 1,
 973     },
 974     proto => {
 975         type => 'string', format => 'pve-fw-protocol-spec',
 976         optional => 1,
 977     },
 978     enable => {
 979         type => 'boolean',
 980         optional => 1,
 981     },
 982     sport => {
 983         type => 'string', format => 'pve-fw-port-spec',
 984         optional => 1,
 985     },
 986     dport => {
 987         type => 'string', format => 'pve-fw-port-spec',
 988         optional => 1,
 989     },
 990     comment => {
 991         type => 'string',
 992         optional => 1,
 993     },
 994 };
 995
 996 sub add_rule_properties {
 997     my ($properties) = @_;
 998
 999     foreach my $k (keys %$rule_properties) {
1000         my $h = $rule_properties->{$k};
1001         # copy data, so that we can modify later without side effects
1002         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1003     }
1004
1005     return $properties;
1006 }
1007
1008 sub delete_rule_properties {
1009     my ($rule, $delete_str) = @_;
1010
1011     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1012         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1013             if !defined($rule_properties->{$opt});
1014         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1015             if $opt eq 'type' || $opt eq 'action';
1016         delete $rule->{$opt};
1017     }
1018
1019     return $rule;
1020 }
1021
1022 my $apply_macro = sub {
1023     my ($macro_name, $param, $verify) = @_;
1024
1025     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1026     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1027
1028     my $rules = [];
1029
1030     foreach my $templ (@$macro_rules) {
1031         my $rule = {};
1032         my $param_used = {};
1033         foreach my $k (keys %$templ) {
1034             my $v = $templ->{$k};
1035             if ($v eq 'PARAM') {
1036                 $v = $param->{$k};
1037                 $param_used->{$k} = 1;
1038             } elsif ($v eq 'DEST') {
1039                 $v = $param->{dest};
1040                 $param_used->{dest} = 1;
1041             } elsif ($v eq 'SOURCE') {
1042                 $v = $param->{source};
1043                 $param_used->{source} = 1;
1044             }
1045
1046             if (!defined($v)) {
1047                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1048                 raise_param_exc({ macro => $msg }) if $verify;
1049                 die "$msg\n";
1050             }
1051             $rule->{$k} = $v;
1052         }
1053         foreach my $k (keys %$param) {
1054             next if $k eq 'macro';
1055             next if !defined($param->{$k});
1056             next if $param_used->{$k};
1057             if (defined($rule->{$k})) {
1058                 if ($rule->{$k} ne $param->{$k}) {
1059                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1060                     raise_param_exc({ $k => $msg }) if $verify;
1061                     die "$msg\n";
1062                 }
1063             } else {
1064                 $rule->{$k} = $param->{$k};
1065             }
1066         }
1067         push @$rules, $rule;
1068     }
1069
1070     return $rules;
1071 };
1072
1073 my $rule_env_iface_lookup = {
1074     'ct' => 1,
1075     'vm' => 1,
1076     'group' => 0,
1077     'cluster' => 1,
1078     'host' => 1,
1079 };
1080
1081 sub verify_rule {
1082     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1083
1084     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1085     my $ipversion = undef;
1086
1087     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1088     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1089
1090     my $errors = $rule->{errors} || {};
1091
1092     my $error_count = 0;
1093
1094     my $add_error = sub {
1095         my ($param, $msg)  = @_;
1096         chomp $msg;
1097         raise_param_exc({ $param => $msg }) if !$noerr;
1098         $error_count++;
1099         $errors->{$param} = $msg if !$errors->{$param};
1100     };
1101
1102     my $check_ipset_or_alias_property = sub {
1103         my ($name) = @_;
1104
1105         if (my $value = $rule->{$name}) {
1106             if ($value =~ m/^\+/) {
1107                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1108                     &$add_error($name, "no such ipset '$1'")
1109                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1110
1111                 } else {
1112                     &$add_error($name, "invalid ipset name '$value'");
1113                 }
1114             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1115                 my $alias = lc($value);
1116                 &$add_error($name, "no such alias '$value'")
1117                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1118             }
1119         }
1120     };
1121
1122     my $type = $rule->{type};
1123     my $action = $rule->{action};
1124
1125     &$add_error('type', "missing property") if !$type;
1126     &$add_error('action', "missing property") if !$action;
1127
1128     if ($type) {
1129         if ($type eq  'in' || $type eq 'out') {
1130             &$add_error('action', "unknown action '$action'")
1131                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1132         } elsif ($type eq 'group') {
1133             &$add_error('type', "security groups not allowed")
1134                 if !$allow_groups;
1135             &$add_error('action', "invalid characters in security group name")
1136                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1137         } else {
1138             &$add_error('type', "unknown rule type '$type'");
1139         }
1140     }
1141
1142     if ($rule->{iface}) {
1143         &$add_error('type', "parameter -i not allowed for this rule type")
1144             if !$allow_iface;
1145         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1146         &$add_error('iface', $@) if $@;
1147         if ($rule_env eq 'vm') {
1148             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1149                 if $rule->{iface} !~  m/^net(\d+)$/;
1150         } elsif ($rule_env eq 'ct') {
1151             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1152                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1153         }
1154     }
1155
1156     if ($rule->{macro}) {
1157         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1158             $rule->{macro} = $preferred_name;
1159         } else {
1160             &$add_error('macro', "unknown macro '$rule->{macro}'");
1161         }
1162     }
1163
1164     if ($rule->{proto}) {
1165         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1166         &$add_error('proto', $@) if $@;
1167     }
1168
1169     if ($rule->{dport}) {
1170         eval { parse_port_name_number_or_range($rule->{dport}); };
1171         &$add_error('dport', $@) if $@;
1172         &$add_error('proto', "missing property - 'dport' requires this property")
1173             if !$rule->{proto};
1174     }
1175
1176     if ($rule->{sport}) {
1177         eval { parse_port_name_number_or_range($rule->{sport}); };
1178         &$add_error('sport', $@) if $@;
1179         &$add_error('proto', "missing property - 'sport' requires this property")
1180             if !$rule->{proto};
1181     }
1182
1183     if ($rule->{source}) {
1184         eval { $ipversion = parse_address_list($rule->{source}); };
1185         &$add_error('source', $@) if $@;
1186         &$check_ipset_or_alias_property('source');
1187     }
1188
1189     if ($rule->{dest}) {
1190         eval { $ipversion = parse_address_list($rule->{dest}); };
1191         &$add_error('dest', $@) if $@;
1192         &$check_ipset_or_alias_property('dest');
1193     }
1194
1195     if ($rule->{macro} && !$error_count) {
1196         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1197         if (my $err = $@) {
1198             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1199                 my $eh = $err->{errors};
1200                 foreach my $p (keys %$eh) {
1201                     &$add_error($p, $eh->{$p});
1202                 }
1203             } else {
1204                 &$add_error('macro', "$err");
1205             }
1206         }
1207     }
1208
1209     $rule->{errors} = $errors if $error_count;
1210     $rule->{ipversion} = $ipversion if $ipversion;
1211
1212     return $rule;
1213 }
1214
1215 sub copy_rule_data {
1216     my ($rule, $param) = @_;
1217
1218     foreach my $k (keys %$rule_properties) {
1219         if (defined(my $v = $param->{$k})) {
1220             if ($v eq '' || $v eq '-') {
1221                 delete $rule->{$k};
1222             } else {
1223                 $rule->{$k} = $v;
1224             }
1225         }
1226     }
1227
1228     return $rule;
1229 }
1230
1231 sub rules_modify_permissions {
1232     my ($rule_env) = @_;
1233
1234     if ($rule_env eq 'host') {
1235         return {
1236             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1237         };
1238     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1239         return {
1240             check => ['perm', '/', [ 'Sys.Modify' ]],
1241         };
1242     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1243         return {
1244             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1245         }
1246     }
1247
1248     return undef;
1249 }
1250
1251 sub rules_audit_permissions {
1252     my ($rule_env) = @_;
1253
1254     if ($rule_env eq 'host') {
1255         return {
1256             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1257         };
1258     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1259         return {
1260             check => ['perm', '/', [ 'Sys.Audit' ]],
1261         };
1262     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1263         return {
1264             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1265         }
1266     }
1267
1268     return undef;
1269 }
1270
1271 # core functions
1272 my $bridge_firewall_enabled = 0;
1273
1274 sub enable_bridge_firewall {
1275
1276     return if $bridge_firewall_enabled; # only once
1277
1278     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1279     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1280
1281     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1282     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1283
1284     $bridge_firewall_enabled = 1;
1285 }
1286
1287 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1288
1289 sub iptables_restore_cmdlist {
1290     my ($cmdlist) = @_;
1291
1292     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1293 }
1294
1295 sub ipset_restore_cmdlist {
1296     my ($cmdlist) = @_;
1297
1298     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1299 }
1300
1301 sub iptables_get_chains {
1302
1303     my $res = {};
1304
1305     # check what chains we want to track
1306     my $is_pvefw_chain = sub {
1307         my $name = shift;
1308
1309         return 1 if $name =~ m/^PVEFW-\S+$/;
1310
1311         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1312
1313         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1314
1315         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1316
1317         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1318         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1319
1320         return undef;
1321     };
1322
1323     my $table = '';
1324
1325     my $hooks = {};
1326
1327     my $parser = sub {
1328         my $line = shift;
1329
1330         return if $line =~ m/^#/;
1331         return if $line =~ m/^\s*$/;
1332
1333         if ($line =~ m/^\*(\S+)$/) {
1334             $table = $1;
1335             return;
1336         }
1337
1338         return if $table ne 'filter';
1339
1340         if ($line =~ m/^:(\S+)\s/) {
1341             my $chain = $1;
1342             return if !&$is_pvefw_chain($chain);
1343             $res->{$chain} = "unknown";
1344         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1345             my ($chain, $sig) = ($1, $2);
1346             return if !&$is_pvefw_chain($chain);
1347             $res->{$chain} = $sig;
1348         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1349             $hooks->{$1} = 1;
1350         } else {
1351             # simply ignore the rest
1352             return;
1353         }
1354     };
1355
1356     run_command("/sbin/iptables-save", outfunc => $parser);
1357
1358     return wantarray ? ($res, $hooks) : $res;
1359 }
1360
1361 sub iptables_chain_digest {
1362     my ($rules) = @_;
1363     my $digest = Digest::SHA->new('sha1');
1364     foreach my $rule (@$rules) { # order is important
1365         $digest->add($rule);
1366     }
1367     return $digest->b64digest;
1368 }
1369
1370 sub ipset_chain_digest {
1371     my ($rules) = @_;
1372
1373     my $digest = Digest::SHA->new('sha1');
1374     foreach my $rule (sort @$rules) { # note: sorted
1375         $digest->add($rule);
1376     }
1377     return $digest->b64digest;
1378 }
1379
1380 sub ipset_get_chains {
1381
1382     my $res = {};
1383     my $chains = {};
1384
1385     my $parser = sub {
1386         my $line = shift;
1387
1388         return if $line =~ m/^#/;
1389         return if $line =~ m/^\s*$/;
1390         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1391             my $chain = $1;
1392             $line =~ s/\s+$//; # delete trailing white space
1393             push @{$chains->{$chain}}, $line;
1394         } else {
1395             # simply ignore the rest
1396             return;
1397         }
1398     };
1399
1400     run_command("/usr/sbin/ipset save", outfunc => $parser);
1401
1402     # compute digest for each chain
1403     foreach my $chain (keys %$chains) {
1404         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1405     }
1406
1407     return $res;
1408 }
1409
1410 sub ruleset_generate_cmdstr {
1411     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1412
1413     return if defined($rule->{enable}) && !$rule->{enable};
1414     return if $rule->{errors};
1415
1416     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1417
1418     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1419     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1420
1421     my @cmd = ();
1422
1423     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1424     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1425
1426     my $source = $rule->{source};
1427     my $dest = $rule->{dest};
1428
1429     if ($source) {
1430         if ($source =~ m/^\+/) {
1431             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1432                 my $name = $1;
1433                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1434                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1435                     push @cmd, "-m set --match-set ${ipset_chain} src";
1436                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1437                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1438                     push @cmd, "-m set --match-set ${ipset_chain} src";
1439                 } else {
1440                     die "no such ipset '$name'\n";
1441                 }
1442             } else {
1443                 die "invalid security group name '$source'\n";
1444             }
1445         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1446             my $alias = lc($source);
1447             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1448             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1449             die "no such alias '$source'\n" if !$e;
1450             push @cmd, "-s $e->{cidr}";
1451         } elsif ($source =~ m/\-/){
1452             push @cmd, "-m iprange --src-range $source";
1453         } else {
1454             push @cmd, "-s $source";
1455         }
1456     }
1457
1458     if ($dest) {
1459         if ($dest =~ m/^\+/) {
1460             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1461                 my $name = $1;
1462                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1463                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1464                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1465                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1466                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1467                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1468                 } else {
1469                     die "no such ipset '$name'\n";
1470                 }
1471             } else {
1472                 die "invalid security group name '$dest'\n";
1473             }
1474         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1475             my $alias = lc($dest);
1476             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1477             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1478             die "no such alias '$dest'\n" if !$e;
1479             push @cmd, "-d $e->{cidr}";
1480         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1481             push @cmd, "-m iprange --dst-range $dest";
1482         } else {
1483             push @cmd, "-d $dest";
1484         }
1485     }
1486
1487     if ($rule->{proto}) {
1488         push @cmd, "-p $rule->{proto}";
1489
1490         my $multiport = 0;
1491         $multiport++ if $nbdport > 1;
1492         $multiport++ if $nbsport > 1;
1493
1494         push @cmd, "--match multiport" if $multiport;
1495
1496         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1497             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1498
1499         if ($rule->{dport}) {
1500             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1501                 # Note: we use dport to store --icmp-type
1502                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1503                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1504             } else {
1505                 if ($nbdport > 1) {
1506                     if ($multiport == 2) {
1507                         push @cmd,  "--ports $rule->{dport}";
1508                     } else {
1509                         push @cmd, "--dports $rule->{dport}";
1510                     }
1511                 } else {
1512                     push @cmd, "--dport $rule->{dport}";
1513                 }
1514             }
1515         }
1516
1517         if ($rule->{sport}) {
1518             if ($nbsport > 1) {
1519                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1520             } else {
1521                 push @cmd, "--sport $rule->{sport}";
1522             }
1523         }
1524     } elsif ($rule->{dport} || $rule->{sport}) {
1525         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1526         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1527     }
1528
1529     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1530
1531     if (my $action = $rule->{action}) {
1532         $action = $actions->{$action} if defined($actions->{$action});
1533         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1534         push @cmd, $goto ? "-g $action" : "-j $action";
1535     }
1536
1537     return scalar(@cmd) ? join(' ', @cmd) : undef;
1538 }
1539
1540 sub ruleset_generate_rule {
1541     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1542
1543     my $rules;
1544
1545     if ($rule->{macro}) {
1546         $rules = &$apply_macro($rule->{macro}, $rule);
1547     } else {
1548         $rules = [ $rule ];
1549     }
1550
1551     # update all or nothing
1552
1553     my @cmds = ();
1554     foreach my $tmp (@$rules) {
1555         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1556             push @cmds, $cmdstr;
1557         }
1558     }
1559
1560     foreach my $cmdstr (@cmds) {
1561         ruleset_addrule($ruleset, $chain, $cmdstr);
1562     }
1563 }
1564
1565 sub ruleset_generate_rule_insert {
1566     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1567
1568     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1569
1570     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1571         ruleset_insertrule($ruleset, $chain, $cmdstr);
1572     }
1573 }
1574
1575 sub ruleset_create_chain {
1576     my ($ruleset, $chain) = @_;
1577
1578     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1579     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1580
1581     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1582
1583     $ruleset->{$chain} = [];
1584 }
1585
1586 sub ruleset_chain_exist {
1587     my ($ruleset, $chain) = @_;
1588
1589     return $ruleset->{$chain} ? 1 : undef;
1590 }
1591
1592 sub ruleset_addrule {
1593    my ($ruleset, $chain, $rule) = @_;
1594
1595    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1596
1597    push @{$ruleset->{$chain}}, "-A $chain $rule";
1598 }
1599
1600 sub ruleset_insertrule {
1601    my ($ruleset, $chain, $rule) = @_;
1602
1603    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1604
1605    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1606 }
1607
1608 sub get_log_rule_base {
1609     my ($chain, $vmid, $msg, $loglevel) = @_;
1610
1611     die "internal error - no log level" if !defined($loglevel);
1612
1613     $vmid = 0 if !defined($vmid);
1614
1615     # Note: we use special format for prefix to pass further
1616     # info to log daemon (VMID, LOGVELEL and CHAIN)
1617
1618     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1619 }
1620
1621 sub ruleset_addlog {
1622     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1623
1624     return if !defined($loglevel);
1625
1626     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1627
1628     $logrule = "$rule $logrule" if defined($rule);
1629
1630     ruleset_addrule($ruleset, $chain, $logrule);
1631 }
1632
1633 sub ruleset_add_chain_policy {
1634     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1635
1636     if ($policy eq 'ACCEPT') {
1637
1638         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1639                               { ACCEPT =>  $accept_action});
1640
1641     } elsif ($policy eq 'DROP') {
1642
1643         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1644
1645         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1646
1647         ruleset_addrule($ruleset, $chain, "-j DROP");
1648     } elsif ($policy eq 'REJECT') {
1649         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1650
1651         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1652
1653         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1654     } else {
1655         # should not happen
1656         die "internal error: unknown policy '$policy'";
1657     }
1658 }
1659
1660 sub ruleset_chain_add_conn_filters {
1661     my ($ruleset, $chain, $accept) = @_;
1662
1663     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1664     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1665 }
1666
1667 sub ruleset_chain_add_input_filters {
1668     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1669
1670     if ($cluster_conf->{ipset}->{blacklist}){
1671         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1672             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1673             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1674             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1675         }
1676         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1677         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1678     }
1679
1680     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1681         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1682     }
1683
1684     if ($options->{tcpflags}) {
1685         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1686     }
1687 }
1688
1689 sub ruleset_create_vm_chain {
1690     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1691
1692     ruleset_create_chain($ruleset, $chain);
1693     my $accept = generate_nfqueue($options);
1694
1695     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1696         if ($direction eq 'OUT') {
1697             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1698                                                       proto => 'udp', sport => 68, dport => 67 });
1699         } else {
1700             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1701                                                       proto => 'udp', sport => 67, dport => 68 });
1702         }
1703     }
1704
1705     if ($direction eq 'OUT') {
1706         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1707             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1708         }
1709         if ($ipfilter_ipset) {
1710             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1711         }
1712         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1713     }
1714 }
1715
1716 sub ruleset_add_group_rule {
1717     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1718
1719     my $group = $rule->{action};
1720     my $group_chain = "GROUP-$group-$direction";
1721     if(!ruleset_chain_exist($ruleset, $group_chain)){
1722         generate_group_rules($ruleset, $cluster_conf, $group);
1723     }
1724
1725     if ($direction eq 'OUT' && $rule->{iface_out}) {
1726         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1727     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1728         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1729     } else {
1730         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1731     }
1732
1733     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1734 }
1735
1736 sub ruleset_generate_vm_rules {
1737     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1738
1739     my $lc_direction = lc($direction);
1740
1741     my $in_accept = generate_nfqueue($options);
1742
1743     foreach my $rule (@$rules) {
1744         next if $rule->{iface} && $rule->{iface} ne $netid;
1745         next if !$rule->{enable} || $rule->{errors};
1746         if ($rule->{type} eq 'group') {
1747             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1748                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1749         } else {
1750             next if $rule->{type} ne $lc_direction;
1751             eval {
1752                 if ($direction eq 'OUT') {
1753                     ruleset_generate_rule($ruleset, $chain, $rule,
1754                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1755                                           undef, $cluster_conf, $vmfw_conf);
1756                 } else {
1757                     ruleset_generate_rule($ruleset, $chain, $rule,
1758                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1759                                           undef, $cluster_conf, $vmfw_conf);
1760                 }
1761             };
1762             warn $@ if $@;
1763         }
1764     }
1765 }
1766
1767 sub generate_nfqueue {
1768     my ($options) = @_;
1769
1770     if ($options->{ips}) {
1771         my $action = "NFQUEUE";
1772         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1773             if (defined($3) && defined($1)) {
1774                 $action .= " --queue-balance $1:$3";
1775             } elsif (defined($1)) {
1776                 $action .= " --queue-num $1";
1777             }
1778         }
1779         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1780         return $action;
1781     } else {
1782         return "ACCEPT";
1783     }
1784 }
1785
1786 sub ruleset_generate_vm_ipsrules {
1787     my ($ruleset, $options, $direction, $iface) = @_;
1788
1789     if ($options->{ips} && $direction eq 'IN') {
1790         my $nfqueue = generate_nfqueue($options);
1791
1792         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1793             ruleset_create_chain($ruleset, "PVEFW-IPS");
1794         }
1795
1796         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1797     }
1798 }
1799
1800 sub generate_venet_rules_direction {
1801     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1802
1803     my $lc_direction = lc($direction);
1804
1805     my $rules = $vmfw_conf->{rules};
1806
1807     my $options = $vmfw_conf->{options};
1808     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1809
1810     my $chain = "venet0-$vmid-$direction";
1811
1812     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1813
1814     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1815
1816     # implement policy
1817     my $policy;
1818
1819     if ($direction eq 'OUT') {
1820         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1821     } else {
1822         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1823     }
1824
1825     my $accept = generate_nfqueue($options);
1826     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1827     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1828
1829     if ($direction eq 'OUT') {
1830         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1831             action => $chain,
1832             source => $ip,
1833             iface_in => 'venet0'});
1834     } else {
1835         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1836             action => $chain,
1837             dest => $ip,
1838             iface_out => 'venet0'});
1839     }
1840 }
1841
1842 sub generate_tap_rules_direction {
1843     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1844
1845     my $lc_direction = lc($direction);
1846
1847     my $rules = $vmfw_conf->{rules};
1848
1849     my $options = $vmfw_conf->{options};
1850     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1851
1852     my $tapchain = "$iface-$direction";
1853
1854     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1855     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1856         if $vmfw_conf->{ipset}->{$ipfilter_name};
1857
1858     # create chain with mac and ip filter
1859     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1860
1861     if ($options->{enable}) {
1862         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1863
1864         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1865
1866         # implement policy
1867         my $policy;
1868
1869         if ($direction eq 'OUT') {
1870             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1871         } else {
1872         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1873         }
1874
1875         my $accept = generate_nfqueue($options);
1876         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1877         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1878     } else {
1879         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1880         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1881     }
1882
1883     # plug the tap chain to bridge chain
1884     if ($direction eq 'IN') {
1885         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1886                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1887     } else {
1888         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1889                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1890     }
1891 }
1892
1893 sub enable_host_firewall {
1894     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1895
1896     my $options = $hostfw_conf->{options};
1897     my $cluster_options = $cluster_conf->{options};
1898     my $rules = $hostfw_conf->{rules};
1899     my $cluster_rules = $cluster_conf->{rules};
1900
1901     # host inbound firewall
1902     my $chain = "PVEFW-HOST-IN";
1903     ruleset_create_chain($ruleset, $chain);
1904
1905     my $loglevel = get_option_log_level($options, "log_level_in");
1906
1907     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1908
1909     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1910     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1911
1912     # we use RETURN because we need to check also tap rules
1913     my $accept_action = 'RETURN';
1914
1915     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1916
1917     # add host rules first, so that cluster wide rules can be overwritten
1918     foreach my $rule (@$rules, @$cluster_rules) {
1919         next if !$rule->{enable} || $rule->{errors};
1920
1921         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1922
1923         eval {
1924             if ($rule->{type} eq 'group') {
1925                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1926             } elsif ($rule->{type} eq 'in') {
1927                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1928                                       undef, $cluster_conf, $hostfw_conf);
1929             }
1930         };
1931         warn $@ if $@;
1932         delete $rule->{iface_in};
1933     }
1934
1935     # allow standard traffic for management ipset (includes cluster network)
1936     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1937     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1938     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1939     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1940     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1941     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1942
1943     my $localnet = local_network();
1944
1945     # corosync
1946     if ($localnet) {
1947         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1948         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1949         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1950     }
1951
1952     # implement input policy
1953     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1954     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1955
1956     # host outbound firewall
1957     $chain = "PVEFW-HOST-OUT";
1958     ruleset_create_chain($ruleset, $chain);
1959
1960     $loglevel = get_option_log_level($options, "log_level_out");
1961
1962     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1963
1964     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1965
1966     # we use RETURN because we may want to check other thigs later
1967     $accept_action = 'RETURN';
1968
1969     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1970
1971     # add host rules first, so that cluster wide rules can be overwritten
1972     foreach my $rule (@$rules, @$cluster_rules) {
1973         next if !$rule->{enable} || $rule->{errors};
1974
1975         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1976         eval {
1977             if ($rule->{type} eq 'group') {
1978                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1979             } elsif ($rule->{type} eq 'out') {
1980                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1981                                       undef, $cluster_conf, $hostfw_conf);
1982             }
1983         };
1984         warn $@ if $@;
1985         delete $rule->{iface_out};
1986     }
1987
1988     # allow standard traffic on cluster network
1989     if ($localnet) {
1990         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1991         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1992         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1993         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1994
1995         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1996         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1997         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1998     }
1999
2000     # implement output policy
2001     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2002     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2003
2004     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2005     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2006 }
2007
2008 sub generate_group_rules {
2009     my ($ruleset, $cluster_conf, $group) = @_;
2010
2011     my $rules = $cluster_conf->{groups}->{$group};
2012
2013     if (!$rules) {
2014         warn "no such security group '$group'\n";
2015         $rules = []; # create empty chain
2016     }
2017
2018     my $chain = "GROUP-${group}-IN";
2019
2020     ruleset_create_chain($ruleset, $chain);
2021     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2022
2023     foreach my $rule (@$rules) {
2024         next if $rule->{type} ne 'in';
2025         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2026     }
2027
2028     $chain = "GROUP-${group}-OUT";
2029
2030     ruleset_create_chain($ruleset, $chain);
2031     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2032
2033     foreach my $rule (@$rules) {
2034         next if $rule->{type} ne 'out';
2035         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2036         # check also other tap rules later
2037         ruleset_generate_rule($ruleset, $chain, $rule,
2038                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2039     }
2040 }
2041
2042 my $MAX_NETS = 32;
2043 my $valid_netdev_names = {};
2044 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2045     $valid_netdev_names->{"net$i"} = 1;
2046 }
2047
2048 sub parse_fw_rule {
2049     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2050
2051     my $orig_line = $line;
2052
2053     my $rule = {};
2054
2055     # we can add single line comments to the end of the rule
2056     if ($line =~ s/#\s*(.*?)\s*$//) {
2057         $rule->{comment} = decode('utf8', $1);
2058     }
2059
2060     # we can disable a rule when prefixed with '|'
2061
2062     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2063
2064     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2065         die "unable to parse rule: $line\n";
2066
2067     $rule->{type} = lc($1);
2068     $rule->{action} = $2;
2069
2070     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2071         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2072             $rule->{macro} = $1;
2073             $rule->{action} = $2;
2074         }
2075     }
2076
2077     while (length($line)) {
2078         if ($line =~ s/^-i (\S+)\s*//) {
2079             $rule->{iface} = $1;
2080             next;
2081         }
2082
2083         last if $rule->{type} eq 'group';
2084
2085         if ($line =~ s/^-p (\S+)\s*//) {
2086             $rule->{proto} = $1;
2087             next;
2088         }
2089
2090         if ($line =~ s/^-dport (\S+)\s*//) {
2091             $rule->{dport} = $1;
2092             next;
2093         }
2094
2095         if ($line =~ s/^-sport (\S+)\s*//) {
2096             $rule->{sport} = $1;
2097             next;
2098         }
2099         if ($line =~ s/^-source (\S+)\s*//) {
2100             $rule->{source} = $1;
2101             next;
2102         }
2103         if ($line =~ s/^-dest (\S+)\s*//) {
2104             $rule->{dest} = $1;
2105             next;
2106         }
2107
2108         last;
2109     }
2110
2111     die "unable to parse rule parameters: $line\n" if length($line);
2112
2113     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2114     if ($verbose && $rule->{errors}) {
2115         warn "$prefix - errors in rule parameters: $orig_line\n";
2116         foreach my $p (keys %{$rule->{errors}}) {
2117             warn "  $p: $rule->{errors}->{$p}\n";
2118         }
2119     }
2120
2121     return $rule;
2122 }
2123
2124 sub parse_vmfw_option {
2125     my ($line) = @_;
2126
2127     my ($opt, $value);
2128
2129     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2130
2131     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2132         $opt = lc($1);
2133         $value = int($2);
2134     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2135         $opt = lc($1);
2136         $value = $2 ? lc($3) : '';
2137     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2138         $opt = lc($1);
2139         $value = uc($3);
2140     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2141         $opt = lc($1);
2142         $value = $2;
2143     } else {
2144         die "can't parse option '$line'\n"
2145     }
2146
2147     return ($opt, $value);
2148 }
2149
2150 sub parse_hostfw_option {
2151     my ($line) = @_;
2152
2153     my ($opt, $value);
2154
2155     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2156
2157     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2158         $opt = lc($1);
2159         $value = int($2);
2160     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2161         $opt = lc($1);
2162         $value = $2 ? lc($3) : '';
2163     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2164         $opt = lc($1);
2165         $value = int($2);
2166     } else {
2167         die "can't parse option '$line'\n"
2168     }
2169
2170     return ($opt, $value);
2171 }
2172
2173 sub parse_clusterfw_option {
2174     my ($line) = @_;
2175
2176     my ($opt, $value);
2177
2178     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2179         $opt = lc($1);
2180         $value = int($2);
2181     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2182         $opt = lc($1);
2183         $value = uc($3);
2184     } else {
2185         die "can't parse option '$line'\n"
2186     }
2187
2188     return ($opt, $value);
2189 }
2190
2191 sub resolve_alias {
2192     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2193
2194     if ($cidr !~ m/^\d/) {
2195         my $alias = lc($cidr);
2196         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2197         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2198         return $e->{cidr} if $e;
2199
2200         die "no such alias '$cidr'\n";
2201     }
2202
2203     return $cidr;
2204 }
2205
2206 sub parse_alias {
2207     my ($line) = @_;
2208
2209     # we can add single line comments to the end of the line
2210     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2211
2212     if ($line =~ m/^(\S+)\s(\S+)$/) {
2213         my ($name, $cidr) = ($1, $2);
2214         $cidr =~ s|/32$||;
2215         pve_verify_ipv4_or_cidr($cidr);
2216         my $data = {
2217             name => $name,
2218             cidr => $cidr,
2219         };
2220         $data->{comment} = $comment  if $comment;
2221         return $data;
2222     }
2223
2224     return undef;
2225 }
2226
2227 sub generic_fw_config_parser {
2228     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2229
2230     my $section;
2231     my $group;
2232
2233     my $res = $empty_conf;
2234
2235     while (defined(my $line = <$fh>)) {
2236         next if $line =~ m/^#/;
2237         next if $line =~ m/^\s*$/;
2238
2239         chomp $line;
2240
2241         my $linenr = $fh->input_line_number();
2242         my $prefix = "$filename (line $linenr)";
2243
2244         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2245             $section = 'options';
2246             next;
2247         }
2248
2249         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2250             $section = 'aliases';
2251             next;
2252         }
2253
2254         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2255             $section = 'groups';
2256             $group = lc($1);
2257             my $comment = $2;
2258             eval {
2259                 die "security group name too long\n" if length($group) > $max_group_name_length;
2260                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2261             };
2262             if (my $err = $@) {
2263                 ($section, $group, $comment) = undef;
2264                 warn "$prefix: $err";
2265                 next;
2266             }
2267
2268             $res->{$section}->{$group} = [];
2269             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2270                 if $comment;
2271             next;
2272         }
2273
2274         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2275             $section = 'rules';
2276             next;
2277         }
2278
2279         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2280             $section = 'ipset';
2281             $group = lc($1);
2282             my $comment = $2;
2283             eval {
2284                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2285                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2286             };
2287             if (my $err = $@) {
2288                 ($section, $group, $comment) = undef;
2289                 warn "$prefix: $err";
2290                 next;
2291             }
2292
2293             $res->{$section}->{$group} = [];
2294             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2295                 if $comment;
2296             next;
2297         }
2298
2299         if (!$section) {
2300             warn "$prefix: skip line - no section\n";
2301             next;
2302         }
2303
2304         if ($section eq 'options') {
2305             eval {
2306                 my ($opt, $value);
2307                 if ($rule_env eq 'cluster') {
2308                     ($opt, $value) = parse_clusterfw_option($line);
2309                 } elsif ($rule_env eq 'host') {
2310                     ($opt, $value) = parse_hostfw_option($line);
2311                 } else {
2312                     ($opt, $value) = parse_vmfw_option($line);
2313                 }
2314                 $res->{options}->{$opt} = $value;
2315             };
2316             warn "$prefix: $@" if $@;
2317         } elsif ($section eq 'aliases') {
2318             eval {
2319                 my $data = parse_alias($line);
2320                 $res->{aliases}->{lc($data->{name})} = $data;
2321             };
2322             warn "$prefix: $@" if $@;
2323         } elsif ($section eq 'rules') {
2324             my $rule;
2325             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2326             if (my $err = $@) {
2327                 warn "$prefix: $err";
2328                 next;
2329             }
2330             push @{$res->{$section}}, $rule;
2331         } elsif ($section eq 'groups') {
2332             my $rule;
2333             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2334             if (my $err = $@) {
2335                 warn "$prefix: $err";
2336                 next;
2337             }
2338             push @{$res->{$section}->{$group}}, $rule;
2339         } elsif ($section eq 'ipset') {
2340             # we can add single line comments to the end of the rule
2341             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2342
2343             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2344             my $nomatch = $1;
2345             my $cidr = $2;
2346             my $errors;
2347
2348             if ($nomatch && !$feature_ipset_nomatch) {
2349                 $errors->{nomatch} = "nomatch not supported by kernel";
2350             }
2351
2352             eval {
2353                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2354                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2355                 } else {
2356                     $cidr =~ s|/32$||;
2357                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2358                 }
2359             };
2360             if (my $err = $@) {
2361                 chomp $err;
2362                 $errors->{cidr} = $err;
2363             }
2364
2365             my $entry = { cidr => $cidr };
2366             $entry->{nomatch} = 1 if $nomatch;
2367             $entry->{comment} = $comment if $comment;
2368             $entry->{errors} =  $errors if $errors;
2369
2370             if ($verbose && $errors) {
2371                 warn "$prefix - errors in ipset '$group': $line\n";
2372                 foreach my $p (keys %{$errors}) {
2373                     warn "  $p: $errors->{$p}\n";
2374                 }
2375             }
2376
2377             push @{$res->{$section}->{$group}}, $entry;
2378         } else {
2379             warn "$prefix: skip line - unknown section\n";
2380             next;
2381         }
2382     }
2383
2384     return $res;
2385 }
2386
2387 sub parse_hostfw_config {
2388     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2389
2390     my $empty_conf = { rules => [], options => {}};
2391
2392     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2393 }
2394
2395 sub parse_vmfw_config {
2396     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2397
2398     my $empty_conf = {
2399         rules => [],
2400         options => {},
2401         aliases => {},
2402         ipset => {} ,
2403         ipset_comments => {},
2404     };
2405
2406     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2407 }
2408
2409 sub parse_clusterfw_config {
2410     my ($filename, $fh, $verbose) = @_;
2411
2412     my $section;
2413     my $group;
2414
2415     my $empty_conf = {
2416         rules => [],
2417         options => {},
2418         aliases => {},
2419         groups => {},
2420         group_comments => {},
2421         ipset => {} ,
2422         ipset_comments => {},
2423     };
2424
2425     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2426 }
2427
2428 sub run_locked {
2429     my ($code, @param) = @_;
2430
2431     my $timeout = 10;
2432
2433     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2434
2435     die $@ if $@;
2436
2437     return $res;
2438 }
2439
2440 sub read_local_vm_config {
2441
2442     my $openvz = {};
2443     my $qemu = {};
2444
2445     my $vmdata = { openvz => $openvz, qemu => $qemu };
2446
2447     my $vmlist = PVE::Cluster::get_vmlist();
2448     return $vmdata if !$vmlist || !$vmlist->{ids};
2449     my $ids = $vmlist->{ids};
2450
2451     foreach my $vmid (keys %$ids) {
2452         next if !$vmid; # skip VE0
2453         my $d = $ids->{$vmid};
2454         next if !$d->{node} || $d->{node} ne $nodename;
2455         next if !$d->{type};
2456         if ($d->{type} eq 'openvz') {
2457             if ($have_pve_manager) {
2458                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2459                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2460                     $openvz->{$vmid} = $conf;
2461                 }
2462             }
2463         } elsif ($d->{type} eq 'qemu') {
2464             if ($have_qemu_server) {
2465                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2466                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2467                     $qemu->{$vmid} = $conf;
2468                 }
2469             }
2470         }
2471     }
2472
2473     return $vmdata;
2474 };
2475
2476 sub load_vmfw_conf {
2477     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2478
2479     my $vmfw_conf = {};
2480
2481     $dir = $pvefw_conf_dir if !defined($dir);
2482
2483     my $filename = "$dir/$vmid.fw";
2484     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2485         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2486         $vmfw_conf->{vmid} = $vmid;
2487     }
2488
2489     return $vmfw_conf;
2490 }
2491
2492 my $format_rules = sub {
2493     my ($rules, $allow_iface) = @_;
2494
2495     my $raw = '';
2496
2497     foreach my $rule (@$rules) {
2498         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2499             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2500             $raw .= uc($rule->{type});
2501             if ($rule->{macro}) {
2502                 $raw .= " $rule->{macro}($rule->{action})";
2503             } else {
2504                 $raw .= " " . $rule->{action};
2505             }
2506             if ($allow_iface && $rule->{iface}) {
2507                 $raw .= " -i $rule->{iface}";
2508             }
2509
2510             if ($rule->{type} ne  'group')  {
2511                 $raw .= " -source $rule->{source}" if $rule->{source};
2512                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2513                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2514                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2515                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2516             }
2517
2518             $raw .= " # " . encode('utf8', $rule->{comment})
2519                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2520             $raw .= "\n";
2521         } else {
2522             die "unknown rule type '$rule->{type}'";
2523         }
2524     }
2525
2526     return $raw;
2527 };
2528
2529 my $format_options = sub {
2530     my ($options) = @_;
2531
2532     my $raw = '';
2533
2534     $raw .= "[OPTIONS]\n\n";
2535     foreach my $opt (keys %$options) {
2536         $raw .= "$opt: $options->{$opt}\n";
2537     }
2538     $raw .= "\n";
2539
2540     return $raw;
2541 };
2542
2543 my $format_aliases = sub {
2544     my ($aliases) = @_;
2545
2546     my $raw = '';
2547
2548     $raw .= "[ALIASES]\n\n";
2549     foreach my $k (keys %$aliases) {
2550         my $e = $aliases->{$k};
2551         $raw .= "$e->{name} $e->{cidr}";
2552         $raw .= " # " . encode('utf8', $e->{comment})
2553             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2554         $raw .= "\n";
2555     }
2556     $raw .= "\n";
2557
2558     return $raw;
2559 };
2560
2561 my $format_ipsets = sub {
2562     my ($fw_conf) = @_;
2563
2564     my $raw = '';
2565
2566     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2567         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2568             my $utf8comment = encode('utf8', $comment);
2569             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2570         } else {
2571             $raw .= "[IPSET $ipset]\n\n";
2572         }
2573         my $options = $fw_conf->{ipset}->{$ipset};
2574
2575         my $nethash = {};
2576         foreach my $entry (@$options) {
2577             $nethash->{$entry->{cidr}} = $entry;
2578         }
2579
2580         foreach my $cidr (sort keys %$nethash) {
2581             my $entry = $nethash->{$cidr};
2582             my $line = $entry->{nomatch} ? '!' : '';
2583             $line .= $entry->{cidr};
2584             $line .= " # " . encode('utf8', $entry->{comment})
2585                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2586             $raw .= "$line\n";
2587         }
2588
2589         $raw .= "\n";
2590     }
2591
2592     return $raw;
2593 };
2594
2595 sub save_vmfw_conf {
2596     my ($vmid, $vmfw_conf) = @_;
2597
2598     my $raw = '';
2599
2600     my $options = $vmfw_conf->{options};
2601     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2602
2603     my $aliases = $vmfw_conf->{aliases};
2604     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2605
2606     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2607
2608     my $rules = $vmfw_conf->{rules} || [];
2609     if ($rules && scalar(@$rules)) {
2610         $raw .= "[RULES]\n\n";
2611         $raw .= &$format_rules($rules, 1);
2612         $raw .= "\n";
2613     }
2614
2615     mkdir $pvefw_conf_dir;
2616
2617     my $filename = "$pvefw_conf_dir/$vmid.fw";
2618     PVE::Tools::file_set_contents($filename, $raw);
2619 }
2620
2621 sub read_vm_firewall_configs {
2622     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2623
2624     my $vmfw_configs = {};
2625
2626     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2627         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2628         next if !$vmfw_conf->{options}; # skip if file does not exists
2629         $vmfw_configs->{$vmid} = $vmfw_conf;
2630     }
2631     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2632         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2633         next if !$vmfw_conf->{options}; # skip if file does not exists
2634         $vmfw_configs->{$vmid} = $vmfw_conf;
2635     }
2636
2637     return $vmfw_configs;
2638 }
2639
2640 sub get_option_log_level {
2641     my ($options, $k) = @_;
2642
2643     my $v = $options->{$k};
2644     $v = $default_log_level if !defined($v);
2645
2646     return undef if $v eq '' || $v eq 'nolog';
2647
2648     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2649
2650     return $v if ($v >= 0) && ($v <= 7);
2651
2652     warn "unknown log level ($k = '$v')\n";
2653
2654     return undef;
2655 }
2656
2657 sub generate_std_chains {
2658     my ($ruleset, $options, $ipversion) = @_;
2659
2660     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2661
2662     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2663
2664     my $chain;
2665
2666     if ($ipversion == 4) {
2667         # same as shorewall smurflog.
2668         $chain = 'PVEFW-smurflog';
2669         $std_chains->{$chain} = [];
2670
2671         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2672         push @{$std_chains->{$chain}}, "-j DROP";
2673     }
2674
2675     # same as shorewall logflags action.
2676     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2677     $chain = 'PVEFW-logflags';
2678     $std_chains->{$chain} = [];
2679
2680     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2681     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2682     push @{$std_chains->{$chain}}, "-j DROP";
2683
2684     foreach my $chain (keys %$std_chains) {
2685         ruleset_create_chain($ruleset, $chain);
2686         foreach my $rule (@{$std_chains->{$chain}}) {
2687             if (ref($rule)) {
2688                 ruleset_generate_rule($ruleset, $chain, $rule);
2689             } else {
2690                 ruleset_addrule($ruleset, $chain, $rule);
2691             }
2692         }
2693     }
2694 }
2695
2696 sub generate_ipset_chains {
2697     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2698
2699     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2700         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2701         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2702     }
2703 }
2704
2705 sub generate_ipset {
2706     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2707
2708     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2709
2710     my $hashsize = scalar(@$options);
2711     if ($hashsize <= 64) {
2712         $hashsize = 64;
2713     } else {
2714         $hashsize = round_powerof2($hashsize);
2715     }
2716
2717     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2718
2719     # remove duplicates
2720     my $nethash = {};
2721     foreach my $entry (@$options) {
2722         next if $entry->{errors}; # skip entries with errors
2723         eval {
2724             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2725             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2726         };
2727         warn $@ if $@;
2728     }
2729
2730     foreach my $cidr (sort keys %$nethash) {
2731         my $entry = $nethash->{$cidr};
2732
2733         my $cmd = "add $name $cidr";
2734         if ($entry->{nomatch}) {
2735             if ($feature_ipset_nomatch) {
2736                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2737             } else {
2738                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2739             }
2740         } else {
2741             push @{$ipset_ruleset->{$name}}, $cmd;
2742         }
2743     }
2744 }
2745
2746 sub round_powerof2 {
2747     my ($int) = @_;
2748
2749     $int--;
2750     $int |= $int >> $_ foreach (1,2,4,8,16);
2751     return ++$int;
2752 }
2753
2754 sub load_clusterfw_conf {
2755     my ($filename, $verbose) = @_;
2756
2757     $filename = $clusterfw_conf_filename if !defined($filename);
2758
2759     my $cluster_conf = {};
2760     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2761         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2762     }
2763
2764     return $cluster_conf;
2765 }
2766
2767 sub save_clusterfw_conf {
2768     my ($cluster_conf) = @_;
2769
2770     my $raw = '';
2771
2772     my $options = $cluster_conf->{options};
2773     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2774
2775     my $aliases = $cluster_conf->{aliases};
2776     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2777
2778     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2779
2780     my $rules = $cluster_conf->{rules};
2781     if ($rules && scalar(@$rules)) {
2782         $raw .= "[RULES]\n\n";
2783         $raw .= &$format_rules($rules, 1);
2784         $raw .= "\n";
2785     }
2786
2787     if ($cluster_conf->{groups}) {
2788         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2789             my $rules = $cluster_conf->{groups}->{$group};
2790             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2791                 my $utf8comment = encode('utf8', $comment);
2792                 $raw .= "[group $group] # $utf8comment\n\n";
2793             } else {
2794                 $raw .= "[group $group]\n\n";
2795             }
2796
2797             $raw .= &$format_rules($rules, 0);
2798             $raw .= "\n";
2799         }
2800     }
2801
2802     mkdir $pvefw_conf_dir;
2803     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2804 }
2805
2806 sub load_hostfw_conf {
2807     my ($cluster_conf, $filename, $verbose) = @_;
2808
2809     $filename = $hostfw_conf_filename if !defined($filename);
2810
2811     my $hostfw_conf = {};
2812     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2813         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2814     }
2815     return $hostfw_conf;
2816 }
2817
2818 sub save_hostfw_conf {
2819     my ($hostfw_conf) = @_;
2820
2821     my $raw = '';
2822
2823     my $options = $hostfw_conf->{options};
2824     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2825
2826     my $rules = $hostfw_conf->{rules};
2827     if ($rules && scalar(@$rules)) {
2828         $raw .= "[RULES]\n\n";
2829         $raw .= &$format_rules($rules, 1);
2830         $raw .= "\n";
2831     }
2832
2833     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2834 }
2835
2836 sub compile {
2837     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2838
2839     my $vmfw_configs;
2840
2841     if ($vmdata) { # test mode
2842         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2843         my $filename = "$testdir/cluster.fw";
2844         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2845
2846         $filename = "$testdir/host.fw";
2847         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2848
2849         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2850     } else { # normal operation
2851         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2852
2853         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2854
2855         $vmdata = read_local_vm_config();
2856         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2857     }
2858
2859     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
2860     return ($ruleset, $ipset_ruleset);
2861 }
2862
2863 sub compile_iptables_filter {
2864     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
2865
2866     $cluster_conf->{ipset}->{venet0} = [];
2867     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2868
2869     my $localnet;
2870     if ($cluster_conf->{aliases}->{local_network}) {
2871         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2872     } else {
2873         $localnet = local_network() || '127.0.0.0/8';
2874         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2875     }
2876
2877     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2878
2879     return ({}, {}) if !$cluster_conf->{options}->{enable};
2880
2881     my $ruleset = {};
2882
2883     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2884     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2885
2886     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2887
2888     my $hostfw_options = $hostfw_conf->{options} || {};
2889
2890     # fixme: what log level should we use here?
2891     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2892
2893     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2894
2895
2896     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2897     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2898     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2899
2900     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2901     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2902
2903     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2904
2905     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2906     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2907
2908     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2909     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2910
2911     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2912
2913     generate_std_chains($ruleset, $hostfw_options, $ipversion);
2914
2915     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2916
2917     my $ipset_ruleset = {};
2918
2919     if ($hostfw_enable) {
2920         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2921         warn $@ if $@; # just to be sure - should not happen
2922     }
2923
2924     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2925
2926     # generate firewall rules for QEMU VMs
2927     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2928         eval {
2929             my $conf = $vmdata->{qemu}->{$vmid};
2930             my $vmfw_conf = $vmfw_configs->{$vmid};
2931             return if !$vmfw_conf;
2932
2933             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2934
2935             foreach my $netid (keys %$conf) {
2936                 next if $netid !~ m/^net(\d+)$/;
2937                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2938                 next if !$net->{firewall};
2939                 my $iface = "tap${vmid}i$1";
2940
2941                 my $macaddr = $net->{macaddr};
2942                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2943                                              $vmfw_conf, $vmid, 'IN');
2944                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2945                                              $vmfw_conf, $vmid, 'OUT');
2946             }
2947         };
2948         warn $@ if $@; # just to be sure - should not happen
2949     }
2950
2951     # generate firewall rules for OpenVZ containers
2952     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2953         eval {
2954             my $conf = $vmdata->{openvz}->{$vmid};
2955
2956             my $vmfw_conf = $vmfw_configs->{$vmid};
2957             return if !$vmfw_conf;
2958
2959             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2960
2961             if ($vmfw_conf->{options}->{enable}) {
2962                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2963                     my $ip = $conf->{ip_address}->{value};
2964                     $ip =~ s/\s+/,/g;
2965                     parse_address_list($ip); # make sure we have a valid $ip list
2966
2967                     my @ips = split(',', $ip);
2968
2969                     foreach my $singleip (@ips) {
2970                         my $venet0ipset = {};
2971                         $venet0ipset->{cidr} = $singleip;
2972                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2973                     }
2974
2975                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2976                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2977                 }
2978             }
2979
2980             if ($conf->{netif} && $conf->{netif}->{value}) {
2981                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2982                 foreach my $netid (keys %$netif) {
2983                     my $d = $netif->{$netid};
2984                     my $bridge = $d->{bridge};
2985                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2986                     my $macaddr = $d->{mac};
2987                     my $iface = $d->{host_ifname};
2988                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2989                                                  $vmfw_conf, $vmid, 'IN');
2990                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2991                                                  $vmfw_conf, $vmid, 'OUT');
2992                 }
2993             }
2994         };
2995         warn $@ if $@; # just to be sure - should not happen
2996     }
2997
2998     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2999         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3000     }
3001
3002     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3003
3004     return ($ruleset, $ipset_ruleset);
3005 }
3006
3007 sub get_ruleset_status {
3008     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3009
3010     my $statushash = {};
3011
3012     foreach my $chain (sort keys %$ruleset) {
3013         my $sig = &$digest_fn($ruleset->{$chain});
3014
3015         $statushash->{$chain}->{sig} = $sig;
3016
3017         my $oldsig = $active_chains->{$chain};
3018         if (!defined($oldsig)) {
3019             $statushash->{$chain}->{action} = 'create';
3020         } else {
3021             if ($oldsig eq $sig) {
3022                 $statushash->{$chain}->{action} = 'exists';
3023             } else {
3024                 $statushash->{$chain}->{action} = 'update';
3025             }
3026         }
3027         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3028         foreach my $cmd (@{$ruleset->{$chain}}) {
3029             print "\t$cmd\n" if $verbose;
3030         }
3031     }
3032
3033     foreach my $chain (sort keys %$active_chains) {
3034         if (!defined($ruleset->{$chain})) {
3035             my $sig = $active_chains->{$chain};
3036             $statushash->{$chain}->{action} = 'delete';
3037             $statushash->{$chain}->{sig} = $sig;
3038             print "delete $chain ($sig)\n" if $verbose;
3039         }
3040     }
3041
3042     return $statushash;
3043 }
3044
3045 sub print_sig_rule {
3046     my ($chain, $sig) = @_;
3047
3048     # We just use this to store a SHA1 checksum used to detect changes
3049     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3050 }
3051
3052 sub get_ruleset_cmdlist {
3053     my ($ruleset, $verbose) = @_;
3054
3055     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3056
3057     my ($active_chains, $hooks) = iptables_get_chains();
3058     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3059
3060     # create missing chains first
3061     foreach my $chain (sort keys %$ruleset) {
3062         my $stat = $statushash->{$chain};
3063         die "internal error" if !$stat;
3064         next if $stat->{action} ne 'create';
3065
3066         $cmdlist .= ":$chain - [0:0]\n";
3067     }
3068
3069     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3070         my $chain = "PVEFW-$h";
3071         if ($ruleset->{$chain} && !$hooks->{$h}) {
3072             $cmdlist .= "-A $h -j $chain\n";
3073         }
3074     }
3075
3076     foreach my $chain (sort keys %$ruleset) {
3077         my $stat = $statushash->{$chain};
3078         die "internal error" if !$stat;
3079
3080         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3081             $cmdlist .= "-F $chain\n";
3082             foreach my $cmd (@{$ruleset->{$chain}}) {
3083                 $cmdlist .= "$cmd\n";
3084             }
3085             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3086         } elsif ($stat->{action} eq 'delete') {
3087             die "internal error"; # this should not happen
3088         } elsif ($stat->{action} eq 'exists') {
3089             # do nothing
3090         } else {
3091             die "internal error - unknown status '$stat->{action}'";
3092         }
3093     }
3094
3095     foreach my $chain (keys %$statushash) {
3096         next if $statushash->{$chain}->{action} ne 'delete';
3097         $cmdlist .= "-F $chain\n";
3098     }
3099     foreach my $chain (keys %$statushash) {
3100         next if $statushash->{$chain}->{action} ne 'delete';
3101         next if $chain eq 'PVEFW-INPUT';
3102         next if $chain eq 'PVEFW-OUTPUT';
3103         next if $chain eq 'PVEFW-FORWARD';
3104         $cmdlist .= "-X $chain\n";
3105     }
3106
3107     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3108
3109     $cmdlist .= "COMMIT\n";
3110
3111     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3112 }
3113
3114 sub get_ipset_cmdlist {
3115     my ($ruleset, $verbose) = @_;
3116
3117     my $cmdlist = "";
3118
3119     my $delete_cmdlist = "";
3120
3121     my $active_chains = ipset_get_chains();
3122     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3123
3124     # remove stale _swap chains
3125     foreach my $chain (keys %$active_chains) {
3126         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3127             $cmdlist .= "destroy $chain\n";
3128         }
3129     }
3130
3131     foreach my $chain (sort keys %$ruleset) {
3132         my $stat = $statushash->{$chain};
3133         die "internal error" if !$stat;
3134
3135         if ($stat->{action} eq 'create') {
3136             foreach my $cmd (@{$ruleset->{$chain}}) {
3137                 $cmdlist .= "$cmd\n";
3138             }
3139         }
3140
3141         if ($stat->{action} eq 'update') {
3142             my $chain_swap = $chain."_swap";
3143
3144             foreach my $cmd (@{$ruleset->{$chain}}) {
3145                 $cmd =~ s/$chain/$chain_swap/;
3146                 $cmdlist .= "$cmd\n";
3147             }
3148             $cmdlist .= "swap $chain_swap $chain\n";
3149             $cmdlist .= "flush $chain_swap\n";
3150             $cmdlist .= "destroy $chain_swap\n";
3151         }
3152
3153     }
3154
3155     foreach my $chain (keys %$statushash) {
3156         next if $statushash->{$chain}->{action} ne 'delete';
3157
3158         $delete_cmdlist .= "flush $chain\n";
3159         $delete_cmdlist .= "destroy $chain\n";
3160     }
3161
3162     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3163
3164     return ($cmdlist, $delete_cmdlist, $changes);
3165 }
3166
3167 sub apply_ruleset {
3168     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3169
3170     enable_bridge_firewall();
3171
3172     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3173         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3174
3175     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3176
3177     if ($verbose) {
3178         if ($ipset_changes) {
3179             print "ipset changes:\n";
3180             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3181             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3182         }
3183
3184         if ($changes) {
3185             print "iptables changes:\n";
3186             print $cmdlist;
3187         }
3188     }
3189
3190     ipset_restore_cmdlist($ipset_create_cmdlist);
3191
3192     iptables_restore_cmdlist($cmdlist);
3193
3194     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3195
3196     # test: re-read status and check if everything is up to date
3197     my $active_chains = iptables_get_chains();
3198     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3199
3200     my $errors;
3201     foreach my $chain (sort keys %$ruleset) {
3202         my $stat = $statushash->{$chain};
3203         if ($stat->{action} ne 'exists') {
3204             warn "unable to update chain '$chain'\n";
3205             $errors = 1;
3206         }
3207     }
3208
3209     die "unable to apply firewall changes\n" if $errors;
3210
3211     update_nf_conntrack_max($hostfw_conf);
3212
3213     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3214
3215 }
3216
3217 sub update_nf_conntrack_max {
3218     my ($hostfw_conf) = @_;
3219
3220     my $max = 65536; # reasonable default
3221
3222     my $options = $hostfw_conf->{options} || {};
3223
3224     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3225         $max = $options->{nf_conntrack_max};
3226         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3227     }
3228
3229     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3230     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3231
3232     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3233
3234     if ($current != $max) {
3235         my $hashsize = int($max/4);
3236         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3237         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3238     }
3239 }
3240
3241 sub update_nf_conntrack_tcp_timeout_established {
3242     my ($hostfw_conf) = @_;
3243
3244     my $options = $hostfw_conf->{options} || {};
3245
3246     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3247
3248     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3249 }
3250
3251 sub remove_pvefw_chains {
3252
3253     my ($chash, $hooks) = iptables_get_chains();
3254     my $cmdlist = "*filter\n";
3255
3256     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3257         if ($hooks->{$h}) {
3258             $cmdlist .= "-D $h -j PVEFW-$h\n";
3259         }
3260     }
3261
3262     foreach my $chain (keys %$chash) {
3263         $cmdlist .= "-F $chain\n";
3264     }
3265
3266     foreach my $chain (keys %$chash) {
3267         $cmdlist .= "-X $chain\n";
3268     }
3269     $cmdlist .= "COMMIT\n";
3270
3271     iptables_restore_cmdlist($cmdlist);
3272
3273     my $ipset_chains = ipset_get_chains();
3274
3275     $cmdlist = "";
3276
3277     foreach my $chain (keys %$ipset_chains) {
3278        $cmdlist .= "flush $chain\n";
3279        $cmdlist .= "destroy $chain\n";
3280     }
3281
3282     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3283 }
3284
3285 sub init {
3286     my $cluster_conf = load_clusterfw_conf();
3287     my $cluster_options = $cluster_conf->{options};
3288     my $enable = $cluster_options->{enable};
3289
3290     return if !$enable;
3291
3292     # load required modules here
3293 }
3294
3295 sub update {
3296     my $code = sub {
3297
3298         my $cluster_conf = load_clusterfw_conf();
3299         my $cluster_options = $cluster_conf->{options};
3300
3301         if (!$cluster_options->{enable}) {
3302             PVE::Firewall::remove_pvefw_chains();
3303             return;
3304         }
3305
3306         my $hostfw_conf = load_hostfw_conf();
3307
3308         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3309
3310         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3311     };
3312
3313     run_locked($code);
3314 }
3315
3316 1;