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     'PVEFW-SET-ACCEPT-MARK' => [
 494         "-j MARK --set-mark 1",
 495     ],
 496     'PVEFW-DropBroadcast' => [
 497         # same as shorewall 'Broadcast'
 498         # simply DROP BROADCAST/MULTICAST/ANYCAST
 499         # we can use this to reduce logging
 500         { action => 'DROP', dsttype => 'BROADCAST' },
 501         { action => 'DROP', dsttype => 'MULTICAST' },
 502         { action => 'DROP', dsttype => 'ANYCAST' },
 503         { action => 'DROP', dest => '224.0.0.0/4' },
 504     ],
 505     'PVEFW-reject' => [
 506         # same as shorewall 'reject'
 507         { action => 'DROP', dsttype => 'BROADCAST' },
 508         { action => 'DROP', source => '224.0.0.0/4' },
 509         { action => 'DROP', proto => 'icmp' },
 510         "-p tcp -j REJECT --reject-with tcp-reset",
 511         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 512         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 513         "-j REJECT --reject-with icmp-host-prohibited",
 514     ],
 515     'PVEFW-Drop' => [
 516         # same as shorewall 'Drop', which is equal to DROP,
 517         # but REJECT/DROP some packages to reduce logging,
 518         # and ACCEPT critical ICMP types
 519         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 520         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 521         { action => 'PVEFW-DropBroadcast' },
 522         # ACCEPT critical ICMP types
 523         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 525         # Drop packets with INVALID state
 526         "-m conntrack --ctstate INVALID -j DROP",
 527         # Drop Microsoft SMB noise
 528         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 529         { action => 'DROP', proto => 'udp', dport => '137:139'},
 530         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 531         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 532         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 533         # Drop new/NotSyn traffic so that it doesn't get logged
 534         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 535         # Drop DNS replies
 536         { action => 'DROP', proto => 'udp', sport => 53 },
 537     ],
 538     'PVEFW-Reject' => [
 539         # same as shorewall 'Reject', which is equal to Reject,
 540         # but REJECT/DROP some packages to reduce logging,
 541         # and ACCEPT critical ICMP types
 542         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 543         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 544         { action => 'PVEFW-DropBroadcast' },
 545         # ACCEPT critical ICMP types
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 548         # Drop packets with INVALID state
 549         "-m conntrack --ctstate INVALID -j DROP",
 550         # Drop Microsoft SMB noise
 551         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 554         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 555         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 556         # Drop new/NotSyn traffic so that it doesn't get logged
 557         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 558         # Drop DNS replies
 559         { action => 'DROP', proto => 'udp', sport => 53 },
 560     ],
 561     'PVEFW-tcpflags' => [
 562         # same as shorewall tcpflags action.
 563         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 564         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 568         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 569     ],
 570     'PVEFW-smurfs' => [
 571         # same as shorewall smurfs action
 572         # Filter packets for smurfs (packets with a broadcast address as the source).
 573         "-s 0.0.0.0/32 -j RETURN",
 574         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 575         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 576     ],
 577 };
 578
 579 # iptables -p icmp -h
 580 my $icmp_type_names = {
 581     any => 1,
 582     'echo-reply' => 1,
 583     'destination-unreachable' => 1,
 584     'network-unreachable' => 1,
 585     'host-unreachable' => 1,
 586     'protocol-unreachable' => 1,
 587     'port-unreachable' => 1,
 588     'fragmentation-needed' => 1,
 589     'source-route-failed' => 1,
 590     'network-unknown' => 1,
 591     'host-unknown' => 1,
 592     'network-prohibited' => 1,
 593     'host-prohibited' => 1,
 594     'TOS-network-unreachable' => 1,
 595     'TOS-host-unreachable' => 1,
 596     'communication-prohibited' => 1,
 597     'host-precedence-violation' => 1,
 598     'precedence-cutoff' => 1,
 599     'source-quench' => 1,
 600     'redirect' => 1,
 601     'network-redirect' => 1,
 602     'host-redirect' => 1,
 603     'TOS-network-redirect' => 1,
 604     'TOS-host-redirect' => 1,
 605     'echo-request' => 1,
 606     'router-advertisement' => 1,
 607     'router-solicitation' => 1,
 608     'time-exceeded' => 1,
 609     'ttl-zero-during-transit' => 1,
 610     'ttl-zero-during-reassembly' => 1,
 611     'parameter-problem' => 1,
 612     'ip-header-bad' => 1,
 613     'required-option-missing' => 1,
 614     'timestamp-request' => 1,
 615     'timestamp-reply' => 1,
 616     'address-mask-request' => 1,
 617     'address-mask-reply' => 1,
 618 };
 619
 620 sub init_firewall_macros {
 621
 622     $pve_fw_parsed_macros = {};
 623
 624     foreach my $k (keys %$pve_fw_macros) {
 625         my $lc_name = lc($k);
 626         my $macro = $pve_fw_macros->{$k};
 627         if (!ref($macro->[0])) {
 628             $pve_fw_macro_descr->{$k} = shift @$macro;
 629         }
 630         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 631         $pve_fw_parsed_macros->{$k} = $macro;
 632     }
 633 }
 634
 635 init_firewall_macros();
 636
 637 sub get_macros {
 638     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 639 }
 640
 641 my $etc_services;
 642
 643 sub get_etc_services {
 644
 645     return $etc_services if $etc_services;
 646
 647     my $filename = "/etc/services";
 648
 649     my $fh = IO::File->new($filename, O_RDONLY);
 650     if (!$fh) {
 651         warn "unable to read '$filename' - $!\n";
 652         return {};
 653     }
 654
 655     my $services = {};
 656
 657     while (my $line = <$fh>) {
 658         chomp ($line);
 659         next if $line =~m/^#/;
 660         next if ($line =~m/^\s*$/);
 661
 662         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 663             $services->{byid}->{$2}->{name} = $1;
 664             $services->{byid}->{$2}->{port} = $2;
 665             $services->{byid}->{$2}->{$3} = 1;
 666             $services->{byname}->{$1} = $services->{byid}->{$2};
 667         }
 668     }
 669
 670     close($fh);
 671
 672     $etc_services = $services;
 673
 674
 675     return $etc_services;
 676 }
 677
 678 my $etc_protocols;
 679
 680 sub get_etc_protocols {
 681     return $etc_protocols if $etc_protocols;
 682
 683     my $filename = "/etc/protocols";
 684
 685     my $fh = IO::File->new($filename, O_RDONLY);
 686     if (!$fh) {
 687         warn "unable to read '$filename' - $!\n";
 688         return {};
 689     }
 690
 691     my $protocols = {};
 692
 693     while (my $line = <$fh>) {
 694         chomp ($line);
 695         next if $line =~m/^#/;
 696         next if ($line =~m/^\s*$/);
 697
 698         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 699             $protocols->{byid}->{$2}->{name} = $1;
 700             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 701         }
 702     }
 703
 704     close($fh);
 705
 706     $etc_protocols = $protocols;
 707
 708     return $etc_protocols;
 709 }
 710
 711 my $ipv4_mask_hash_localnet = {
 712     '255.255.0.0' => 16,
 713     '255.255.128.0' => 17,
 714     '255.255.192.0' => 18,
 715     '255.255.224.0' => 19,
 716     '255.255.240.0' => 20,
 717     '255.255.248.0' => 21,
 718     '255.255.252.0' => 22,
 719     '255.255.254.0' => 23,
 720     '255.255.255.0' => 24,
 721     '255.255.255.128' => 25,
 722     '255.255.255.192' => 26,
 723     '255.255.255.224' => 27,
 724     '255.255.255.240' => 28,
 725     '255.255.255.248' => 29,
 726     '255.255.255.252' => 30,
 727 };
 728
 729 my $__local_network;
 730
 731 sub local_network {
 732     my ($new_value) = @_;
 733
 734     $__local_network = $new_value if defined($new_value);
 735
 736     return $__local_network if defined($__local_network);
 737
 738     eval {
 739         my $nodename = PVE::INotify::nodename();
 740
 741         my $ip = PVE::Cluster::remote_node_ip($nodename);
 742
 743         my $testip = Net::IP->new($ip);
 744
 745         my $routes = PVE::ProcFSTools::read_proc_net_route();
 746         foreach my $entry (@$routes) {
 747             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 748             next if !defined($mask);
 749             return if $mask eq '0.0.0.0';
 750             my $cidr = "$entry->{dest}/$mask";
 751             my $testnet = Net::IP->new($cidr);
 752             if ($testnet->overlaps($testip)) {
 753                 $__local_network = $cidr;
 754                 return;
 755             }
 756         }
 757     };
 758     warn $@ if $@;
 759
 760     return $__local_network;
 761 }
 762
 763 # ipset names are limited to 31 characters, and we use '_swap'
 764 # suffix for atomic update, for example PVEFW-${VMID}-${ipset_name}_swap
 765
 766 my $max_iptables_ipset_name_length = 31 - length("_swap");
 767
 768 sub compute_ipset_chain_name {
 769     my ($vmid, $ipset_name) = @_;
 770
 771     $vmid = 0 if !defined($vmid);
 772
 773     my $id = "$vmid-${ipset_name}";
 774
 775
 776     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 777         $id = PVE::Tools::fnv31a_hex($id);
 778     }
 779
 780     return "PVEFW-$id";
 781 }
 782
 783 sub compute_ipfilter_ipset_name {
 784     my ($iface) = @_;
 785
 786     return "ipfilter-$iface";
 787 }
 788
 789 sub parse_address_list {
 790     my ($str) = @_;
 791
 792     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 793         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 794         return;
 795     }
 796
 797     if ($str =~ m/^${ip_alias_pattern}$/) {
 798         die "alias name too long\n" if length($str) > $max_alias_name_length;
 799         return;
 800     }
 801
 802     my $count = 0;
 803     my $iprange = 0;
 804     foreach my $elem (split(/,/, $str)) {
 805         $count++;
 806         if (!Net::IP->new($elem)) {
 807             my $err = Net::IP::Error();
 808             die "invalid IP address: $err\n";
 809         }
 810         $iprange = 1 if $elem =~ m/-/;
 811     }
 812
 813     die "you can use a range in a list\n" if $iprange && $count > 1;
 814 }
 815
 816 sub parse_port_name_number_or_range {
 817     my ($str) = @_;
 818
 819     my $services = PVE::Firewall::get_etc_services();
 820     my $count = 0;
 821     my $icmp_port = 0;
 822
 823     foreach my $item (split(/,/, $str)) {
 824         $count++;
 825         if ($item =~ m/^(\d+):(\d+)$/) {
 826             my ($port1, $port2) = ($1, $2);
 827             die "invalid port '$port1'\n" if $port1 > 65535;
 828             die "invalid port '$port2'\n" if $port2 > 65535;
 829         } elsif ($item =~ m/^(\d+)$/) {
 830             my $port = $1;
 831             die "invalid port '$port'\n" if $port > 65535;
 832         } else {
 833             if ($icmp_type_names->{$item}) {
 834                 $icmp_port = 1;
 835             } else {
 836                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 837             }
 838         }
 839     }
 840
 841     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 842
 843     return $count;
 844 }
 845
 846 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 847 sub pve_fw_verify_port_spec {
 848    my ($portstr) = @_;
 849
 850    parse_port_name_number_or_range($portstr);
 851
 852    return $portstr;
 853 }
 854
 855 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 856 sub pve_fw_verify_v4addr_spec {
 857    my ($list) = @_;
 858
 859    parse_address_list($list);
 860
 861    return $list;
 862 }
 863
 864 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 865 sub pve_fw_verify_protocol_spec {
 866    my ($proto) = @_;
 867
 868    my $protocols = get_etc_protocols();
 869
 870    die "unknown protocol '$proto'\n" if $proto &&
 871        !(defined($protocols->{byname}->{$proto}) ||
 872          defined($protocols->{byid}->{$proto}));
 873
 874    return $proto;
 875 }
 876
 877
 878 # helper function for API
 879
 880 sub copy_opject_with_digest {
 881     my ($object) = @_;
 882
 883     my $sha = Digest::SHA->new('sha1');
 884
 885     my $res = {};
 886     foreach my $k (sort keys %$object) {
 887         my $v = $object->{$k};
 888         next if !defined($v);
 889         $res->{$k} = $v;
 890         $sha->add($k, ':', $v, "\n");
 891     }
 892
 893     my $digest = $sha->hexdigest;
 894
 895     $res->{digest} = $digest;
 896
 897     return wantarray ? ($res, $digest) : $res;
 898 }
 899
 900 sub copy_list_with_digest {
 901     my ($list) = @_;
 902
 903     my $sha = Digest::SHA->new('sha1');
 904
 905     my $res = [];
 906     foreach my $entry (@$list) {
 907         my $data = {};
 908         foreach my $k (sort keys %$entry) {
 909             my $v = $entry->{$k};
 910             next if !defined($v);
 911             $data->{$k} = $v;
 912             # Note: digest ignores refs ($rule->{errors})
 913             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 914         }
 915         push @$res, $data;
 916     }
 917
 918     my $digest = $sha->hexdigest;
 919
 920     foreach my $entry (@$res) {
 921         $entry->{digest} = $digest;
 922     }
 923
 924     return wantarray ? ($res, $digest) : $res;
 925 }
 926
 927 my $rule_properties = {
 928     pos => {
 929         description => "Update rule at position <pos>.",
 930         type => 'integer',
 931         minimum => 0,
 932         optional => 1,
 933     },
 934     digest => get_standard_option('pve-config-digest'),
 935     type => {
 936         type => 'string',
 937         optional => 1,
 938         enum => ['in', 'out', 'group'],
 939     },
 940     action => {
 941         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 942         type => 'string',
 943         optional => 1,
 944         pattern => $security_group_name_pattern,
 945         maxLength => 20,
 946         minLength => 2,
 947     },
 948     macro => {
 949         type => 'string',
 950         optional => 1,
 951         maxLength => 128,
 952     },
 953     iface => get_standard_option('pve-iface', { optional => 1 }),
 954     source => {
 955         type => 'string', format => 'pve-fw-v4addr-spec',
 956         optional => 1,
 957     },
 958     dest => {
 959         type => 'string', format => 'pve-fw-v4addr-spec',
 960         optional => 1,
 961     },
 962     proto => {
 963         type => 'string', format => 'pve-fw-protocol-spec',
 964         optional => 1,
 965     },
 966     enable => {
 967         type => 'boolean',
 968         optional => 1,
 969     },
 970     sport => {
 971         type => 'string', format => 'pve-fw-port-spec',
 972         optional => 1,
 973     },
 974     dport => {
 975         type => 'string', format => 'pve-fw-port-spec',
 976         optional => 1,
 977     },
 978     comment => {
 979         type => 'string',
 980         optional => 1,
 981     },
 982 };
 983
 984 sub add_rule_properties {
 985     my ($properties) = @_;
 986
 987     foreach my $k (keys %$rule_properties) {
 988         my $h = $rule_properties->{$k};
 989         # copy data, so that we can modify later without side effects
 990         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 991     }
 992
 993     return $properties;
 994 }
 995
 996 sub delete_rule_properties {
 997     my ($rule, $delete_str) = @_;
 998
 999     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1000         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1001             if !defined($rule_properties->{$opt});
1002         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1003             if $opt eq 'type' || $opt eq 'action';
1004         delete $rule->{$opt};
1005     }
1006
1007     return $rule;
1008 }
1009
1010 my $apply_macro = sub {
1011     my ($macro_name, $param, $verify) = @_;
1012
1013     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1014     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1015
1016     my $rules = [];
1017
1018     foreach my $templ (@$macro_rules) {
1019         my $rule = {};
1020         my $param_used = {};
1021         foreach my $k (keys %$templ) {
1022             my $v = $templ->{$k};
1023             if ($v eq 'PARAM') {
1024                 $v = $param->{$k};
1025                 $param_used->{$k} = 1;
1026             } elsif ($v eq 'DEST') {
1027                 $v = $param->{dest};
1028                 $param_used->{dest} = 1;
1029             } elsif ($v eq 'SOURCE') {
1030                 $v = $param->{source};
1031                 $param_used->{source} = 1;
1032             }
1033
1034             if (!defined($v)) {
1035                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1036                 raise_param_exc({ macro => $msg }) if $verify;
1037                 die "$msg\n";
1038             }
1039             $rule->{$k} = $v;
1040         }
1041         foreach my $k (keys %$param) {
1042             next if $k eq 'macro';
1043             next if !defined($param->{$k});
1044             next if $param_used->{$k};
1045             if (defined($rule->{$k})) {
1046                 if ($rule->{$k} ne $param->{$k}) {
1047                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1048                     raise_param_exc({ $k => $msg }) if $verify;
1049                     die "$msg\n";
1050                 }
1051             } else {
1052                 $rule->{$k} = $param->{$k};
1053             }
1054         }
1055         push @$rules, $rule;
1056     }
1057
1058     return $rules;
1059 };
1060
1061 my $rule_env_iface_lookup = {
1062     'ct' => 1,
1063     'vm' => 1,
1064     'group' => 0,
1065     'cluster' => 1,
1066     'host' => 1,
1067 };
1068
1069 sub verify_rule {
1070     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1071
1072     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1073
1074     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1075     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1076
1077     my $errors = $rule->{errors} || {};
1078
1079     my $error_count = 0;
1080
1081     my $add_error = sub {
1082         my ($param, $msg)  = @_;
1083         chomp $msg;
1084         raise_param_exc({ $param => $msg }) if !$noerr;
1085         $error_count++;
1086         $errors->{$param} = $msg if !$errors->{$param};
1087     };
1088
1089     my $check_ipset_or_alias_property = sub {
1090         my ($name) = @_;
1091
1092         if (my $value = $rule->{$name}) {
1093             if ($value =~ m/^\+/) {
1094                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1095                     &$add_error($name, "no such ipset '$1'")
1096                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1097
1098                 } else {
1099                     &$add_error($name, "invalid ipset name '$value'");
1100                 }
1101             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1102                 my $alias = lc($value);
1103                 &$add_error($name, "no such alias '$value'")
1104                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1105             }
1106         }
1107     };
1108
1109     my $type = $rule->{type};
1110     my $action = $rule->{action};
1111
1112     &$add_error('type', "missing property") if !$type;
1113     &$add_error('action', "missing property") if !$action;
1114
1115     if ($type) {
1116         if ($type eq  'in' || $type eq 'out') {
1117             &$add_error('action', "unknown action '$action'")
1118                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1119         } elsif ($type eq 'group') {
1120             &$add_error('type', "security groups not allowed")
1121                 if !$allow_groups;
1122             &$add_error('action', "invalid characters in security group name")
1123                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1124         } else {
1125             &$add_error('type', "unknown rule type '$type'");
1126         }
1127     }
1128
1129     if ($rule->{iface}) {
1130         &$add_error('type', "parameter -i not allowed for this rule type")
1131             if !$allow_iface;
1132         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1133         &$add_error('iface', $@) if $@;
1134         if ($rule_env eq 'vm') {
1135             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1136                 if $rule->{iface} !~  m/^net(\d+)$/;
1137         } elsif ($rule_env eq 'ct') {
1138             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1139                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1140         }
1141     }
1142
1143     if ($rule->{macro}) {
1144         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1145             $rule->{macro} = $preferred_name;
1146         } else {
1147             &$add_error('macro', "unknown macro '$rule->{macro}'");
1148         }
1149     }
1150
1151     if ($rule->{proto}) {
1152         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1153         &$add_error('proto', $@) if $@;
1154     }
1155
1156     if ($rule->{dport}) {
1157         eval { parse_port_name_number_or_range($rule->{dport}); };
1158         &$add_error('dport', $@) if $@;
1159         &$add_error('proto', "missing property - 'dport' requires this property")
1160             if !$rule->{proto};
1161     }
1162
1163     if ($rule->{sport}) {
1164         eval { parse_port_name_number_or_range($rule->{sport}); };
1165         &$add_error('sport', $@) if $@;
1166         &$add_error('proto', "missing property - 'sport' requires this property")
1167             if !$rule->{proto};
1168     }
1169
1170     if ($rule->{source}) {
1171         eval { parse_address_list($rule->{source}); };
1172         &$add_error('source', $@) if $@;
1173         &$check_ipset_or_alias_property('source');
1174     }
1175
1176     if ($rule->{dest}) {
1177         eval { parse_address_list($rule->{dest}); };
1178         &$add_error('dest', $@) if $@;
1179         &$check_ipset_or_alias_property('dest');
1180     }
1181
1182     if ($rule->{macro} && !$error_count) {
1183         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1184         if (my $err = $@) {
1185             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1186                 my $eh = $err->{errors};
1187                 foreach my $p (keys %$eh) {
1188                     &$add_error($p, $eh->{$p});
1189                 }
1190             } else {
1191                 &$add_error('macro', "$err");
1192             }
1193         }
1194     }
1195
1196     $rule->{errors} = $errors if $error_count;
1197
1198     return $rule;
1199 }
1200
1201 sub copy_rule_data {
1202     my ($rule, $param) = @_;
1203
1204     foreach my $k (keys %$rule_properties) {
1205         if (defined(my $v = $param->{$k})) {
1206             if ($v eq '' || $v eq '-') {
1207                 delete $rule->{$k};
1208             } else {
1209                 $rule->{$k} = $v;
1210             }
1211         }
1212     }
1213
1214     return $rule;
1215 }
1216
1217 sub rules_modify_permissions {
1218     my ($rule_env) = @_;
1219
1220     if ($rule_env eq 'host') {
1221         return {
1222             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1223         };
1224     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1225         return {
1226             check => ['perm', '/', [ 'Sys.Modify' ]],
1227         };
1228     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1229         return {
1230             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1231         }
1232     }
1233
1234     return undef;
1235 }
1236
1237 sub rules_audit_permissions {
1238     my ($rule_env) = @_;
1239
1240     if ($rule_env eq 'host') {
1241         return {
1242             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1243         };
1244     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1245         return {
1246             check => ['perm', '/', [ 'Sys.Audit' ]],
1247         };
1248     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1249         return {
1250             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1251         }
1252     }
1253
1254     return undef;
1255 }
1256
1257 # core functions
1258 my $bridge_firewall_enabled = 0;
1259
1260 sub enable_bridge_firewall {
1261
1262     return if $bridge_firewall_enabled; # only once
1263
1264     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1265     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1266
1267     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1268     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1269
1270     $bridge_firewall_enabled = 1;
1271 }
1272
1273 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1274
1275 sub iptables_restore_cmdlist {
1276     my ($cmdlist) = @_;
1277
1278     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1279 }
1280
1281 sub ipset_restore_cmdlist {
1282     my ($cmdlist) = @_;
1283
1284     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1285 }
1286
1287 sub iptables_get_chains {
1288
1289     my $res = {};
1290
1291     # check what chains we want to track
1292     my $is_pvefw_chain = sub {
1293         my $name = shift;
1294
1295         return 1 if $name =~ m/^PVEFW-\S+$/;
1296
1297         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1298
1299         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1300
1301         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1302
1303         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1304         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1305
1306         return undef;
1307     };
1308
1309     my $table = '';
1310
1311     my $hooks = {};
1312
1313     my $parser = sub {
1314         my $line = shift;
1315
1316         return if $line =~ m/^#/;
1317         return if $line =~ m/^\s*$/;
1318
1319         if ($line =~ m/^\*(\S+)$/) {
1320             $table = $1;
1321             return;
1322         }
1323
1324         return if $table ne 'filter';
1325
1326         if ($line =~ m/^:(\S+)\s/) {
1327             my $chain = $1;
1328             return if !&$is_pvefw_chain($chain);
1329             $res->{$chain} = "unknown";
1330         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1331             my ($chain, $sig) = ($1, $2);
1332             return if !&$is_pvefw_chain($chain);
1333             $res->{$chain} = $sig;
1334         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1335             $hooks->{$1} = 1;
1336         } else {
1337             # simply ignore the rest
1338             return;
1339         }
1340     };
1341
1342     run_command("/sbin/iptables-save", outfunc => $parser);
1343
1344     return wantarray ? ($res, $hooks) : $res;
1345 }
1346
1347 sub iptables_chain_digest {
1348     my ($rules) = @_;
1349     my $digest = Digest::SHA->new('sha1');
1350     foreach my $rule (@$rules) { # order is important
1351         $digest->add($rule);
1352     }
1353     return $digest->b64digest;
1354 }
1355
1356 sub ipset_chain_digest {
1357     my ($rules) = @_;
1358
1359     my $digest = Digest::SHA->new('sha1');
1360     foreach my $rule (sort @$rules) { # note: sorted
1361         $digest->add($rule);
1362     }
1363     return $digest->b64digest;
1364 }
1365
1366 sub ipset_get_chains {
1367
1368     my $res = {};
1369     my $chains = {};
1370
1371     my $parser = sub {
1372         my $line = shift;
1373
1374         return if $line =~ m/^#/;
1375         return if $line =~ m/^\s*$/;
1376         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1377             my $chain = $1;
1378             $line =~ s/\s+$//; # delete trailing white space
1379             push @{$chains->{$chain}}, $line;
1380         } else {
1381             # simply ignore the rest
1382             return;
1383         }
1384     };
1385
1386     run_command("/usr/sbin/ipset save", outfunc => $parser);
1387
1388     # compute digest for each chain
1389     foreach my $chain (keys %$chains) {
1390         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1391     }
1392
1393     return $res;
1394 }
1395
1396 sub ruleset_generate_cmdstr {
1397     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1398
1399     return if defined($rule->{enable}) && !$rule->{enable};
1400     return if $rule->{errors};
1401
1402     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1403
1404     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1405     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1406
1407     my @cmd = ();
1408
1409     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1410     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1411
1412     my $source = $rule->{source};
1413     my $dest = $rule->{dest};
1414
1415     if ($source) {
1416         if ($source =~ m/^\+/) {
1417             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1418                 my $name = $1;
1419                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1420                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1421                     push @cmd, "-m set --match-set ${ipset_chain} src";
1422                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1423                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1424                     push @cmd, "-m set --match-set ${ipset_chain} src";
1425                 } else {
1426                     die "no such ipset '$name'\n";
1427                 }
1428             } else {
1429                 die "invalid security group name '$source'\n";
1430             }
1431         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1432             my $alias = lc($source);
1433             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1434             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1435             die "no such alias '$source'\n" if !$e;
1436             push @cmd, "-s $e->{cidr}";
1437         } elsif ($source =~ m/\-/){
1438             push @cmd, "-m iprange --src-range $source";
1439         } else {
1440             push @cmd, "-s $source";
1441         }
1442     }
1443
1444     if ($dest) {
1445         if ($dest =~ m/^\+/) {
1446             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1447                 my $name = $1;
1448                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1449                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1450                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1451                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1452                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1453                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1454                 } else {
1455                     die "no such ipset '$name'\n";
1456                 }
1457             } else {
1458                 die "invalid security group name '$dest'\n";
1459             }
1460         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1461             my $alias = lc($dest);
1462             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1463             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1464             die "no such alias '$dest'\n" if !$e;
1465             push @cmd, "-d $e->{cidr}";
1466         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1467             push @cmd, "-m iprange --dst-range $dest";
1468         } else {
1469             push @cmd, "-d $dest";
1470         }
1471     }
1472
1473     if ($rule->{proto}) {
1474         push @cmd, "-p $rule->{proto}";
1475
1476         my $multiport = 0;
1477         $multiport++ if $nbdport > 1;
1478         $multiport++ if $nbsport > 1;
1479
1480         push @cmd, "--match multiport" if $multiport;
1481
1482         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1483             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1484
1485         if ($rule->{dport}) {
1486             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1487                 # Note: we use dport to store --icmp-type
1488                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1489                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1490             } else {
1491                 if ($nbdport > 1) {
1492                     if ($multiport == 2) {
1493                         push @cmd,  "--ports $rule->{dport}";
1494                     } else {
1495                         push @cmd, "--dports $rule->{dport}";
1496                     }
1497                 } else {
1498                     push @cmd, "--dport $rule->{dport}";
1499                 }
1500             }
1501         }
1502
1503         if ($rule->{sport}) {
1504             if ($nbsport > 1) {
1505                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1506             } else {
1507                 push @cmd, "--sport $rule->{sport}";
1508             }
1509         }
1510     } elsif ($rule->{dport} || $rule->{sport}) {
1511         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1512         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1513     }
1514
1515     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1516
1517     if (my $action = $rule->{action}) {
1518         $action = $actions->{$action} if defined($actions->{$action});
1519         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1520         push @cmd, $goto ? "-g $action" : "-j $action";
1521     }
1522
1523     return scalar(@cmd) ? join(' ', @cmd) : undef;
1524 }
1525
1526 sub ruleset_generate_rule {
1527     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1528
1529     my $rules;
1530
1531     if ($rule->{macro}) {
1532         $rules = &$apply_macro($rule->{macro}, $rule);
1533     } else {
1534         $rules = [ $rule ];
1535     }
1536
1537     # update all or nothing
1538
1539     my @cmds = ();
1540     foreach my $tmp (@$rules) {
1541         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1542             push @cmds, $cmdstr;
1543         }
1544     }
1545
1546     foreach my $cmdstr (@cmds) {
1547         ruleset_addrule($ruleset, $chain, $cmdstr);
1548     }
1549 }
1550
1551 sub ruleset_generate_rule_insert {
1552     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1553
1554     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1555
1556     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1557         ruleset_insertrule($ruleset, $chain, $cmdstr);
1558     }
1559 }
1560
1561 sub ruleset_create_chain {
1562     my ($ruleset, $chain) = @_;
1563
1564     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1565     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1566
1567     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1568
1569     $ruleset->{$chain} = [];
1570 }
1571
1572 sub ruleset_chain_exist {
1573     my ($ruleset, $chain) = @_;
1574
1575     return $ruleset->{$chain} ? 1 : undef;
1576 }
1577
1578 sub ruleset_addrule {
1579    my ($ruleset, $chain, $rule) = @_;
1580
1581    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1582
1583    push @{$ruleset->{$chain}}, "-A $chain $rule";
1584 }
1585
1586 sub ruleset_insertrule {
1587    my ($ruleset, $chain, $rule) = @_;
1588
1589    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1590
1591    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1592 }
1593
1594 sub get_log_rule_base {
1595     my ($chain, $vmid, $msg, $loglevel) = @_;
1596
1597     die "internal error - no log level" if !defined($loglevel);
1598
1599     $vmid = 0 if !defined($vmid);
1600
1601     # Note: we use special format for prefix to pass further
1602     # info to log daemon (VMID, LOGVELEL and CHAIN)
1603
1604     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1605 }
1606
1607 sub ruleset_addlog {
1608     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1609
1610     return if !defined($loglevel);
1611
1612     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1613
1614     $logrule = "$rule $logrule" if defined($rule);
1615
1616     ruleset_addrule($ruleset, $chain, $logrule);
1617 }
1618
1619 sub ruleset_add_chain_policy {
1620     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1621
1622     if ($policy eq 'ACCEPT') {
1623
1624         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1625                               { ACCEPT =>  $accept_action});
1626
1627     } elsif ($policy eq 'DROP') {
1628
1629         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1630
1631         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1632
1633         ruleset_addrule($ruleset, $chain, "-j DROP");
1634     } elsif ($policy eq 'REJECT') {
1635         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1636
1637         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1638
1639         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1640     } else {
1641         # should not happen
1642         die "internal error: unknown policy '$policy'";
1643     }
1644 }
1645
1646 sub ruleset_chain_add_conn_filters {
1647     my ($ruleset, $chain, $accept) = @_;
1648
1649     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1650     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1651 }
1652
1653 sub ruleset_chain_add_input_filters {
1654     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1655
1656     if ($cluster_conf->{ipset}->{blacklist}){
1657         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1658             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1659             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1660             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1661         }
1662         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1663         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1664     }
1665
1666     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1667         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1668     }
1669
1670     if ($options->{tcpflags}) {
1671         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1672     }
1673 }
1674
1675 sub ruleset_create_vm_chain {
1676     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1677
1678     ruleset_create_chain($ruleset, $chain);
1679     my $accept = generate_nfqueue($options);
1680
1681     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1682         if ($direction eq 'OUT') {
1683             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1684                                                       proto => 'udp', sport => 68, dport => 67 });
1685         } else {
1686             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1687                                                       proto => 'udp', sport => 67, dport => 68 });
1688         }
1689     }
1690
1691     if ($direction eq 'OUT') {
1692         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1693             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1694         }
1695         if ($ipfilter_ipset) {
1696             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1697         }
1698         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1699     }
1700 }
1701
1702 sub ruleset_add_group_rule {
1703     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1704
1705     my $group = $rule->{action};
1706     my $group_chain = "GROUP-$group-$direction";
1707     if(!ruleset_chain_exist($ruleset, $group_chain)){
1708         generate_group_rules($ruleset, $cluster_conf, $group);
1709     }
1710
1711     if ($direction eq 'OUT' && $rule->{iface_out}) {
1712         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1713     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1714         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1715     } else {
1716         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1717     }
1718
1719     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1720 }
1721
1722 sub ruleset_generate_vm_rules {
1723     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1724
1725     my $lc_direction = lc($direction);
1726
1727     my $in_accept = generate_nfqueue($options);
1728
1729     foreach my $rule (@$rules) {
1730         next if $rule->{iface} && $rule->{iface} ne $netid;
1731         next if !$rule->{enable} || $rule->{errors};
1732         if ($rule->{type} eq 'group') {
1733             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1734                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1735         } else {
1736             next if $rule->{type} ne $lc_direction;
1737             eval {
1738                 if ($direction eq 'OUT') {
1739                     ruleset_generate_rule($ruleset, $chain, $rule,
1740                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1741                                           undef, $cluster_conf, $vmfw_conf);
1742                 } else {
1743                     ruleset_generate_rule($ruleset, $chain, $rule,
1744                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1745                                           undef, $cluster_conf, $vmfw_conf);
1746                 }
1747             };
1748             warn $@ if $@;
1749         }
1750     }
1751 }
1752
1753 sub generate_nfqueue {
1754     my ($options) = @_;
1755
1756     if ($options->{ips}) {
1757         my $action = "NFQUEUE";
1758         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1759             if (defined($3) && defined($1)) {
1760                 $action .= " --queue-balance $1:$3";
1761             } elsif (defined($1)) {
1762                 $action .= " --queue-num $1";
1763             }
1764         }
1765         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1766         return $action;
1767     } else {
1768         return "ACCEPT";
1769     }
1770 }
1771
1772 sub ruleset_generate_vm_ipsrules {
1773     my ($ruleset, $options, $direction, $iface) = @_;
1774
1775     if ($options->{ips} && $direction eq 'IN') {
1776         my $nfqueue = generate_nfqueue($options);
1777
1778         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1779             ruleset_create_chain($ruleset, "PVEFW-IPS");
1780         }
1781
1782         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1783     }
1784 }
1785
1786 sub generate_venet_rules_direction {
1787     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1788
1789     my $lc_direction = lc($direction);
1790
1791     my $rules = $vmfw_conf->{rules};
1792
1793     my $options = $vmfw_conf->{options};
1794     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1795
1796     my $chain = "venet0-$vmid-$direction";
1797
1798     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1799
1800     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1801
1802     # implement policy
1803     my $policy;
1804
1805     if ($direction eq 'OUT') {
1806         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1807     } else {
1808         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1809     }
1810
1811     my $accept = generate_nfqueue($options);
1812     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1813     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1814
1815     if ($direction eq 'OUT') {
1816         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1817             action => $chain,
1818             source => $ip,
1819             iface_in => 'venet0'});
1820     } else {
1821         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1822             action => $chain,
1823             dest => $ip,
1824             iface_out => 'venet0'});
1825     }
1826 }
1827
1828 sub generate_tap_rules_direction {
1829     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1830
1831     my $lc_direction = lc($direction);
1832
1833     my $rules = $vmfw_conf->{rules};
1834
1835     my $options = $vmfw_conf->{options};
1836     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1837
1838     my $tapchain = "$iface-$direction";
1839
1840     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1841     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1842         if $vmfw_conf->{ipset}->{$ipfilter_name};
1843
1844     # create chain with mac and ip filter
1845     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1846
1847     if ($options->{enable}) {
1848         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1849
1850         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1851
1852         # implement policy
1853         my $policy;
1854
1855         if ($direction eq 'OUT') {
1856             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1857         } else {
1858         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1859         }
1860
1861         my $accept = generate_nfqueue($options);
1862         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1863         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1864     } else {
1865         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1866         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1867     }
1868
1869     # plug the tap chain to bridge chain
1870     if ($direction eq 'IN') {
1871         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1872                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1873     } else {
1874         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1875                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1876     }
1877 }
1878
1879 sub enable_host_firewall {
1880     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1881
1882     my $options = $hostfw_conf->{options};
1883     my $cluster_options = $cluster_conf->{options};
1884     my $rules = $hostfw_conf->{rules};
1885     my $cluster_rules = $cluster_conf->{rules};
1886
1887     # host inbound firewall
1888     my $chain = "PVEFW-HOST-IN";
1889     ruleset_create_chain($ruleset, $chain);
1890
1891     my $loglevel = get_option_log_level($options, "log_level_in");
1892
1893     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1894
1895     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1896     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1897
1898     # we use RETURN because we need to check also tap rules
1899     my $accept_action = 'RETURN';
1900
1901     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1902
1903     # add host rules first, so that cluster wide rules can be overwritten
1904     foreach my $rule (@$rules, @$cluster_rules) {
1905         next if !$rule->{enable} || $rule->{errors};
1906
1907         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1908
1909         eval {
1910             if ($rule->{type} eq 'group') {
1911                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1912             } elsif ($rule->{type} eq 'in') {
1913                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1914                                       undef, $cluster_conf, $hostfw_conf);
1915             }
1916         };
1917         warn $@ if $@;
1918         delete $rule->{iface_in};
1919     }
1920
1921     # allow standard traffic for management ipset (includes cluster network)
1922     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1923     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1924     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1925     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1926     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1927     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1928
1929     my $localnet = local_network();
1930
1931     # corosync
1932     if ($localnet) {
1933         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1934         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1935         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1936     }
1937
1938     # implement input policy
1939     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1940     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1941
1942     # host outbound firewall
1943     $chain = "PVEFW-HOST-OUT";
1944     ruleset_create_chain($ruleset, $chain);
1945
1946     $loglevel = get_option_log_level($options, "log_level_out");
1947
1948     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1949
1950     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1951
1952     # we use RETURN because we may want to check other thigs later
1953     $accept_action = 'RETURN';
1954
1955     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1956
1957     # add host rules first, so that cluster wide rules can be overwritten
1958     foreach my $rule (@$rules, @$cluster_rules) {
1959         next if !$rule->{enable} || $rule->{errors};
1960
1961         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1962         eval {
1963             if ($rule->{type} eq 'group') {
1964                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1965             } elsif ($rule->{type} eq 'out') {
1966                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1967                                       undef, $cluster_conf, $hostfw_conf);
1968             }
1969         };
1970         warn $@ if $@;
1971         delete $rule->{iface_out};
1972     }
1973
1974     # allow standard traffic on cluster network
1975     if ($localnet) {
1976         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1977         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1978         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1979         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1980
1981         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1982         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1983         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1984     }
1985
1986     # implement output policy
1987     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1988     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1989
1990     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1991     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1992 }
1993
1994 sub generate_group_rules {
1995     my ($ruleset, $cluster_conf, $group) = @_;
1996
1997     my $rules = $cluster_conf->{groups}->{$group};
1998
1999     if (!$rules) {
2000         warn "no such security group '$group'\n";
2001         $rules = []; # create empty chain
2002     }
2003
2004     my $chain = "GROUP-${group}-IN";
2005
2006     ruleset_create_chain($ruleset, $chain);
2007     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2008
2009     foreach my $rule (@$rules) {
2010         next if $rule->{type} ne 'in';
2011         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2012     }
2013
2014     $chain = "GROUP-${group}-OUT";
2015
2016     ruleset_create_chain($ruleset, $chain);
2017     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2018
2019     foreach my $rule (@$rules) {
2020         next if $rule->{type} ne 'out';
2021         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2022         # check also other tap rules later
2023         ruleset_generate_rule($ruleset, $chain, $rule,
2024                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2025     }
2026 }
2027
2028 my $MAX_NETS = 32;
2029 my $valid_netdev_names = {};
2030 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2031     $valid_netdev_names->{"net$i"} = 1;
2032 }
2033
2034 sub parse_fw_rule {
2035     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2036
2037     my $orig_line = $line;
2038
2039     my $rule = {};
2040
2041     # we can add single line comments to the end of the rule
2042     if ($line =~ s/#\s*(.*?)\s*$//) {
2043         $rule->{comment} = decode('utf8', $1);
2044     }
2045
2046     # we can disable a rule when prefixed with '|'
2047
2048     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2049
2050     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2051         die "unable to parse rule: $line\n";
2052
2053     $rule->{type} = lc($1);
2054     $rule->{action} = $2;
2055
2056     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2057         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2058             $rule->{macro} = $1;
2059             $rule->{action} = $2;
2060         }
2061     }
2062
2063     while (length($line)) {
2064         if ($line =~ s/^-i (\S+)\s*//) {
2065             $rule->{iface} = $1;
2066             next;
2067         }
2068
2069         last if $rule->{type} eq 'group';
2070
2071         if ($line =~ s/^-p (\S+)\s*//) {
2072             $rule->{proto} = $1;
2073             next;
2074         }
2075
2076         if ($line =~ s/^-dport (\S+)\s*//) {
2077             $rule->{dport} = $1;
2078             next;
2079         }
2080
2081         if ($line =~ s/^-sport (\S+)\s*//) {
2082             $rule->{sport} = $1;
2083             next;
2084         }
2085         if ($line =~ s/^-source (\S+)\s*//) {
2086             $rule->{source} = $1;
2087             next;
2088         }
2089         if ($line =~ s/^-dest (\S+)\s*//) {
2090             $rule->{dest} = $1;
2091             next;
2092         }
2093
2094         last;
2095     }
2096
2097     die "unable to parse rule parameters: $line\n" if length($line);
2098
2099     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2100     if ($verbose && $rule->{errors}) {
2101         warn "$prefix - errors in rule parameters: $orig_line\n";
2102         foreach my $p (keys %{$rule->{errors}}) {
2103             warn "  $p: $rule->{errors}->{$p}\n";
2104         }
2105     }
2106
2107     return $rule;
2108 }
2109
2110 sub parse_vmfw_option {
2111     my ($line) = @_;
2112
2113     my ($opt, $value);
2114
2115     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2116
2117     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2118         $opt = lc($1);
2119         $value = int($2);
2120     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2121         $opt = lc($1);
2122         $value = $2 ? lc($3) : '';
2123     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2124         $opt = lc($1);
2125         $value = uc($3);
2126     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2127         $opt = lc($1);
2128         $value = $2;
2129     } else {
2130         die "can't parse option '$line'\n"
2131     }
2132
2133     return ($opt, $value);
2134 }
2135
2136 sub parse_hostfw_option {
2137     my ($line) = @_;
2138
2139     my ($opt, $value);
2140
2141     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2142
2143     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2144         $opt = lc($1);
2145         $value = int($2);
2146     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2147         $opt = lc($1);
2148         $value = $2 ? lc($3) : '';
2149     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2150         $opt = lc($1);
2151         $value = int($2);
2152     } else {
2153         die "can't parse option '$line'\n"
2154     }
2155
2156     return ($opt, $value);
2157 }
2158
2159 sub parse_clusterfw_option {
2160     my ($line) = @_;
2161
2162     my ($opt, $value);
2163
2164     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2165         $opt = lc($1);
2166         $value = int($2);
2167     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2168         $opt = lc($1);
2169         $value = uc($3);
2170     } else {
2171         die "can't parse option '$line'\n"
2172     }
2173
2174     return ($opt, $value);
2175 }
2176
2177 sub resolve_alias {
2178     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2179
2180     if ($cidr !~ m/^\d/) {
2181         my $alias = lc($cidr);
2182         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2183         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2184         return $e->{cidr} if $e;
2185
2186         die "no such alias '$cidr'\n";
2187     }
2188
2189     return $cidr;
2190 }
2191
2192 sub parse_alias {
2193     my ($line) = @_;
2194
2195     # we can add single line comments to the end of the line
2196     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2197
2198     if ($line =~ m/^(\S+)\s(\S+)$/) {
2199         my ($name, $cidr) = ($1, $2);
2200         $cidr =~ s|/32$||;
2201         pve_verify_ipv4_or_cidr($cidr);
2202         my $data = {
2203             name => $name,
2204             cidr => $cidr,
2205         };
2206         $data->{comment} = $comment  if $comment;
2207         return $data;
2208     }
2209
2210     return undef;
2211 }
2212
2213 sub generic_fw_config_parser {
2214     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2215
2216     my $section;
2217     my $group;
2218
2219     my $res = $empty_conf;
2220
2221     while (defined(my $line = <$fh>)) {
2222         next if $line =~ m/^#/;
2223         next if $line =~ m/^\s*$/;
2224
2225         chomp $line;
2226
2227         my $linenr = $fh->input_line_number();
2228         my $prefix = "$filename (line $linenr)";
2229
2230         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2231             $section = 'options';
2232             next;
2233         }
2234
2235         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2236             $section = 'aliases';
2237             next;
2238         }
2239
2240         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2241             $section = 'groups';
2242             $group = lc($1);
2243             my $comment = $2;
2244             eval {
2245                 die "security group name too long\n" if length($group) > $max_group_name_length;
2246                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2247             };
2248             if (my $err = $@) {
2249                 ($section, $group, $comment) = undef;
2250                 warn "$prefix: $err";
2251                 next;
2252             }
2253
2254             $res->{$section}->{$group} = [];
2255             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2256                 if $comment;
2257             next;
2258         }
2259
2260         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2261             $section = 'rules';
2262             next;
2263         }
2264
2265         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2266             $section = 'ipset';
2267             $group = lc($1);
2268             my $comment = $2;
2269             eval {
2270                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2271                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2272             };
2273             if (my $err = $@) {
2274                 ($section, $group, $comment) = undef;
2275                 warn "$prefix: $err";
2276                 next;
2277             }
2278
2279             $res->{$section}->{$group} = [];
2280             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2281                 if $comment;
2282             next;
2283         }
2284
2285         if (!$section) {
2286             warn "$prefix: skip line - no section\n";
2287             next;
2288         }
2289
2290         if ($section eq 'options') {
2291             eval {
2292                 my ($opt, $value);
2293                 if ($rule_env eq 'cluster') {
2294                     ($opt, $value) = parse_clusterfw_option($line);
2295                 } elsif ($rule_env eq 'host') {
2296                     ($opt, $value) = parse_hostfw_option($line);
2297                 } else {
2298                     ($opt, $value) = parse_vmfw_option($line);
2299                 }
2300                 $res->{options}->{$opt} = $value;
2301             };
2302             warn "$prefix: $@" if $@;
2303         } elsif ($section eq 'aliases') {
2304             eval {
2305                 my $data = parse_alias($line);
2306                 $res->{aliases}->{lc($data->{name})} = $data;
2307             };
2308             warn "$prefix: $@" if $@;
2309         } elsif ($section eq 'rules') {
2310             my $rule;
2311             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2312             if (my $err = $@) {
2313                 warn "$prefix: $err";
2314                 next;
2315             }
2316             push @{$res->{$section}}, $rule;
2317         } elsif ($section eq 'groups') {
2318             my $rule;
2319             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2320             if (my $err = $@) {
2321                 warn "$prefix: $err";
2322                 next;
2323             }
2324             push @{$res->{$section}->{$group}}, $rule;
2325         } elsif ($section eq 'ipset') {
2326             # we can add single line comments to the end of the rule
2327             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2328
2329             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2330             my $nomatch = $1;
2331             my $cidr = $2;
2332             my $errors;
2333
2334             if ($nomatch && !$feature_ipset_nomatch) {
2335                 $errors->{nomatch} = "nomatch not supported by kernel";
2336             }
2337
2338             eval {
2339                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2340                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2341                 } else {
2342                     $cidr =~ s|/32$||;
2343                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2344                 }
2345             };
2346             if (my $err = $@) {
2347                 chomp $err;
2348                 $errors->{cidr} = $err;
2349             }
2350
2351             my $entry = { cidr => $cidr };
2352             $entry->{nomatch} = 1 if $nomatch;
2353             $entry->{comment} = $comment if $comment;
2354             $entry->{errors} =  $errors if $errors;
2355
2356             if ($verbose && $errors) {
2357                 warn "$prefix - errors in ipset '$group': $line\n";
2358                 foreach my $p (keys %{$errors}) {
2359                     warn "  $p: $errors->{$p}\n";
2360                 }
2361             }
2362
2363             push @{$res->{$section}->{$group}}, $entry;
2364         } else {
2365             warn "$prefix: skip line - unknown section\n";
2366             next;
2367         }
2368     }
2369
2370     return $res;
2371 }
2372
2373 sub parse_hostfw_config {
2374     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2375
2376     my $empty_conf = { rules => [], options => {}};
2377
2378     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2379 }
2380
2381 sub parse_vmfw_config {
2382     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2383
2384     my $empty_conf = {
2385         rules => [],
2386         options => {},
2387         aliases => {},
2388         ipset => {} ,
2389         ipset_comments => {},
2390     };
2391
2392     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2393 }
2394
2395 sub parse_clusterfw_config {
2396     my ($filename, $fh, $verbose) = @_;
2397
2398     my $section;
2399     my $group;
2400
2401     my $empty_conf = {
2402         rules => [],
2403         options => {},
2404         aliases => {},
2405         groups => {},
2406         group_comments => {},
2407         ipset => {} ,
2408         ipset_comments => {},
2409     };
2410
2411     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2412 }
2413
2414 sub run_locked {
2415     my ($code, @param) = @_;
2416
2417     my $timeout = 10;
2418
2419     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2420
2421     die $@ if $@;
2422
2423     return $res;
2424 }
2425
2426 sub read_local_vm_config {
2427
2428     my $openvz = {};
2429     my $qemu = {};
2430
2431     my $vmdata = { openvz => $openvz, qemu => $qemu };
2432
2433     my $vmlist = PVE::Cluster::get_vmlist();
2434     return $vmdata if !$vmlist || !$vmlist->{ids};
2435     my $ids = $vmlist->{ids};
2436
2437     foreach my $vmid (keys %$ids) {
2438         next if !$vmid; # skip VE0
2439         my $d = $ids->{$vmid};
2440         next if !$d->{node} || $d->{node} ne $nodename;
2441         next if !$d->{type};
2442         if ($d->{type} eq 'openvz') {
2443             if ($have_pve_manager) {
2444                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2445                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2446                     $openvz->{$vmid} = $conf;
2447                 }
2448             }
2449         } elsif ($d->{type} eq 'qemu') {
2450             if ($have_qemu_server) {
2451                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2452                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2453                     $qemu->{$vmid} = $conf;
2454                 }
2455             }
2456         }
2457     }
2458
2459     return $vmdata;
2460 };
2461
2462 sub load_vmfw_conf {
2463     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2464
2465     my $vmfw_conf = {};
2466
2467     $dir = $pvefw_conf_dir if !defined($dir);
2468
2469     my $filename = "$dir/$vmid.fw";
2470     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2471         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2472         $vmfw_conf->{vmid} = $vmid;
2473     }
2474
2475     return $vmfw_conf;
2476 }
2477
2478 my $format_rules = sub {
2479     my ($rules, $allow_iface) = @_;
2480
2481     my $raw = '';
2482
2483     foreach my $rule (@$rules) {
2484         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2485             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2486             $raw .= uc($rule->{type});
2487             if ($rule->{macro}) {
2488                 $raw .= " $rule->{macro}($rule->{action})";
2489             } else {
2490                 $raw .= " " . $rule->{action};
2491             }
2492             if ($allow_iface && $rule->{iface}) {
2493                 $raw .= " -i $rule->{iface}";
2494             }
2495
2496             if ($rule->{type} ne  'group')  {
2497                 $raw .= " -source $rule->{source}" if $rule->{source};
2498                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2499                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2500                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2501                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2502             }
2503
2504             $raw .= " # " . encode('utf8', $rule->{comment})
2505                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2506             $raw .= "\n";
2507         } else {
2508             die "unknown rule type '$rule->{type}'";
2509         }
2510     }
2511
2512     return $raw;
2513 };
2514
2515 my $format_options = sub {
2516     my ($options) = @_;
2517
2518     my $raw = '';
2519
2520     $raw .= "[OPTIONS]\n\n";
2521     foreach my $opt (keys %$options) {
2522         $raw .= "$opt: $options->{$opt}\n";
2523     }
2524     $raw .= "\n";
2525
2526     return $raw;
2527 };
2528
2529 my $format_aliases = sub {
2530     my ($aliases) = @_;
2531
2532     my $raw = '';
2533
2534     $raw .= "[ALIASES]\n\n";
2535     foreach my $k (keys %$aliases) {
2536         my $e = $aliases->{$k};
2537         $raw .= "$e->{name} $e->{cidr}";
2538         $raw .= " # " . encode('utf8', $e->{comment})
2539             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2540         $raw .= "\n";
2541     }
2542     $raw .= "\n";
2543
2544     return $raw;
2545 };
2546
2547 my $format_ipsets = sub {
2548     my ($fw_conf) = @_;
2549
2550     my $raw = '';
2551
2552     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2553         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2554             my $utf8comment = encode('utf8', $comment);
2555             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2556         } else {
2557             $raw .= "[IPSET $ipset]\n\n";
2558         }
2559         my $options = $fw_conf->{ipset}->{$ipset};
2560
2561         my $nethash = {};
2562         foreach my $entry (@$options) {
2563             $nethash->{$entry->{cidr}} = $entry;
2564         }
2565
2566         foreach my $cidr (sort keys %$nethash) {
2567             my $entry = $nethash->{$cidr};
2568             my $line = $entry->{nomatch} ? '!' : '';
2569             $line .= $entry->{cidr};
2570             $line .= " # " . encode('utf8', $entry->{comment})
2571                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2572             $raw .= "$line\n";
2573         }
2574
2575         $raw .= "\n";
2576     }
2577
2578     return $raw;
2579 };
2580
2581 sub save_vmfw_conf {
2582     my ($vmid, $vmfw_conf) = @_;
2583
2584     my $raw = '';
2585
2586     my $options = $vmfw_conf->{options};
2587     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2588
2589     my $aliases = $vmfw_conf->{aliases};
2590     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2591
2592     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2593
2594     my $rules = $vmfw_conf->{rules} || [];
2595     if ($rules && scalar(@$rules)) {
2596         $raw .= "[RULES]\n\n";
2597         $raw .= &$format_rules($rules, 1);
2598         $raw .= "\n";
2599     }
2600
2601     mkdir $pvefw_conf_dir;
2602
2603     my $filename = "$pvefw_conf_dir/$vmid.fw";
2604     PVE::Tools::file_set_contents($filename, $raw);
2605 }
2606
2607 sub read_vm_firewall_configs {
2608     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2609
2610     my $vmfw_configs = {};
2611
2612     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2613         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2614         next if !$vmfw_conf->{options}; # skip if file does not exists
2615         $vmfw_configs->{$vmid} = $vmfw_conf;
2616     }
2617     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2618         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2619         next if !$vmfw_conf->{options}; # skip if file does not exists
2620         $vmfw_configs->{$vmid} = $vmfw_conf;
2621     }
2622
2623     return $vmfw_configs;
2624 }
2625
2626 sub get_option_log_level {
2627     my ($options, $k) = @_;
2628
2629     my $v = $options->{$k};
2630     $v = $default_log_level if !defined($v);
2631
2632     return undef if $v eq '' || $v eq 'nolog';
2633
2634     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2635
2636     return $v if ($v >= 0) && ($v <= 7);
2637
2638     warn "unknown log level ($k = '$v')\n";
2639
2640     return undef;
2641 }
2642
2643 sub generate_std_chains {
2644     my ($ruleset, $options) = @_;
2645
2646     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2647
2648     # same as shorewall smurflog.
2649     my $chain = 'PVEFW-smurflog';
2650     $pve_std_chains->{$chain} = [];
2651
2652     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2653     push @{$pve_std_chains->{$chain}}, "-j DROP";
2654
2655     # same as shorewall logflags action.
2656     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2657     $chain = 'PVEFW-logflags';
2658     $pve_std_chains->{$chain} = [];
2659
2660     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2661     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2662     push @{$pve_std_chains->{$chain}}, "-j DROP";
2663
2664     foreach my $chain (keys %$pve_std_chains) {
2665         ruleset_create_chain($ruleset, $chain);
2666         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2667             if (ref($rule)) {
2668                 ruleset_generate_rule($ruleset, $chain, $rule);
2669             } else {
2670                 ruleset_addrule($ruleset, $chain, $rule);
2671             }
2672         }
2673     }
2674 }
2675
2676 sub generate_ipset_chains {
2677     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2678
2679     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2680         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2681         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2682     }
2683 }
2684
2685 sub generate_ipset {
2686     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2687
2688     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2689
2690     my $hashsize = scalar(@$options);
2691     if ($hashsize <= 64) {
2692         $hashsize = 64;
2693     } else {
2694         $hashsize = round_powerof2($hashsize);
2695     }
2696
2697     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2698
2699     # remove duplicates
2700     my $nethash = {};
2701     foreach my $entry (@$options) {
2702         next if $entry->{errors}; # skip entries with errors
2703         eval {
2704             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2705             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2706         };
2707         warn $@ if $@;
2708     }
2709
2710     foreach my $cidr (sort keys %$nethash) {
2711         my $entry = $nethash->{$cidr};
2712
2713         my $cmd = "add $name $cidr";
2714         if ($entry->{nomatch}) {
2715             if ($feature_ipset_nomatch) {
2716                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2717             } else {
2718                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2719             }
2720         } else {
2721             push @{$ipset_ruleset->{$name}}, $cmd;
2722         }
2723     }
2724 }
2725
2726 sub round_powerof2 {
2727     my ($int) = @_;
2728
2729     $int--;
2730     $int |= $int >> $_ foreach (1,2,4,8,16);
2731     return ++$int;
2732 }
2733
2734 sub load_clusterfw_conf {
2735     my ($filename, $verbose) = @_;
2736
2737     $filename = $clusterfw_conf_filename if !defined($filename);
2738
2739     my $cluster_conf = {};
2740     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2741         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2742     }
2743
2744     return $cluster_conf;
2745 }
2746
2747 sub save_clusterfw_conf {
2748     my ($cluster_conf) = @_;
2749
2750     my $raw = '';
2751
2752     my $options = $cluster_conf->{options};
2753     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2754
2755     my $aliases = $cluster_conf->{aliases};
2756     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2757
2758     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2759
2760     my $rules = $cluster_conf->{rules};
2761     if ($rules && scalar(@$rules)) {
2762         $raw .= "[RULES]\n\n";
2763         $raw .= &$format_rules($rules, 1);
2764         $raw .= "\n";
2765     }
2766
2767     if ($cluster_conf->{groups}) {
2768         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2769             my $rules = $cluster_conf->{groups}->{$group};
2770             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2771                 my $utf8comment = encode('utf8', $comment);
2772                 $raw .= "[group $group] # $utf8comment\n\n";
2773             } else {
2774                 $raw .= "[group $group]\n\n";
2775             }
2776
2777             $raw .= &$format_rules($rules, 0);
2778             $raw .= "\n";
2779         }
2780     }
2781
2782     mkdir $pvefw_conf_dir;
2783     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2784 }
2785
2786 sub load_hostfw_conf {
2787     my ($cluster_conf, $filename, $verbose) = @_;
2788
2789     $filename = $hostfw_conf_filename if !defined($filename);
2790
2791     my $hostfw_conf = {};
2792     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2793         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2794     }
2795     return $hostfw_conf;
2796 }
2797
2798 sub save_hostfw_conf {
2799     my ($hostfw_conf) = @_;
2800
2801     my $raw = '';
2802
2803     my $options = $hostfw_conf->{options};
2804     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2805
2806     my $rules = $hostfw_conf->{rules};
2807     if ($rules && scalar(@$rules)) {
2808         $raw .= "[RULES]\n\n";
2809         $raw .= &$format_rules($rules, 1);
2810         $raw .= "\n";
2811     }
2812
2813     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2814 }
2815
2816 sub compile {
2817     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2818
2819     my $vmfw_configs;
2820
2821     if ($vmdata) { # test mode
2822         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2823         my $filename = "$testdir/cluster.fw";
2824         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2825
2826         $filename = "$testdir/host.fw";
2827         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2828
2829         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2830     } else { # normal operation
2831         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2832
2833         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2834
2835         $vmdata = read_local_vm_config();
2836         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2837     }
2838
2839     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
2840     return ($ruleset, $ipset_ruleset);
2841 }
2842
2843 sub compile_iptables_filter {
2844     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
2845
2846     $cluster_conf->{ipset}->{venet0} = [];
2847     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2848
2849     my $localnet;
2850     if ($cluster_conf->{aliases}->{local_network}) {
2851         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2852     } else {
2853         $localnet = local_network() || '127.0.0.0/8';
2854         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2855     }
2856
2857     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2858
2859     return ({}, {}) if !$cluster_conf->{options}->{enable};
2860
2861     my $ruleset = {};
2862
2863     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2864     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2865
2866     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2867
2868     my $hostfw_options = $hostfw_conf->{options} || {};
2869
2870     # fixme: what log level should we use here?
2871     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2872
2873     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2874
2875
2876     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2877     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2878     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2879
2880     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2881     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2882
2883     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2884
2885     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2886     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2887
2888     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2889     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2890
2891     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2892
2893     generate_std_chains($ruleset, $hostfw_options);
2894
2895     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2896
2897     my $ipset_ruleset = {};
2898
2899     if ($hostfw_enable) {
2900         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2901         warn $@ if $@; # just to be sure - should not happen
2902     }
2903
2904     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2905
2906     # generate firewall rules for QEMU VMs
2907     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2908         eval {
2909             my $conf = $vmdata->{qemu}->{$vmid};
2910             my $vmfw_conf = $vmfw_configs->{$vmid};
2911             return if !$vmfw_conf;
2912
2913             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2914
2915             foreach my $netid (keys %$conf) {
2916                 next if $netid !~ m/^net(\d+)$/;
2917                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2918                 next if !$net->{firewall};
2919                 my $iface = "tap${vmid}i$1";
2920
2921                 my $macaddr = $net->{macaddr};
2922                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2923                                              $vmfw_conf, $vmid, 'IN');
2924                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2925                                              $vmfw_conf, $vmid, 'OUT');
2926             }
2927         };
2928         warn $@ if $@; # just to be sure - should not happen
2929     }
2930
2931     # generate firewall rules for OpenVZ containers
2932     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2933         eval {
2934             my $conf = $vmdata->{openvz}->{$vmid};
2935
2936             my $vmfw_conf = $vmfw_configs->{$vmid};
2937             return if !$vmfw_conf;
2938
2939             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2940
2941             if ($vmfw_conf->{options}->{enable}) {
2942                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2943                     my $ip = $conf->{ip_address}->{value};
2944                     $ip =~ s/\s+/,/g;
2945                     parse_address_list($ip); # make sure we have a valid $ip list
2946
2947                     my @ips = split(',', $ip);
2948
2949                     foreach my $singleip (@ips) {
2950                         my $venet0ipset = {};
2951                         $venet0ipset->{cidr} = $singleip;
2952                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2953                     }
2954
2955                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2956                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2957                 }
2958             }
2959
2960             if ($conf->{netif} && $conf->{netif}->{value}) {
2961                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2962                 foreach my $netid (keys %$netif) {
2963                     my $d = $netif->{$netid};
2964                     my $bridge = $d->{bridge};
2965                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2966                     my $macaddr = $d->{mac};
2967                     my $iface = $d->{host_ifname};
2968                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2969                                                  $vmfw_conf, $vmid, 'IN');
2970                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2971                                                  $vmfw_conf, $vmid, 'OUT');
2972                 }
2973             }
2974         };
2975         warn $@ if $@; # just to be sure - should not happen
2976     }
2977
2978     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2979         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2980     }
2981
2982     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2983
2984     return ($ruleset, $ipset_ruleset);
2985 }
2986
2987 sub get_ruleset_status {
2988     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2989
2990     my $statushash = {};
2991
2992     foreach my $chain (sort keys %$ruleset) {
2993         my $sig = &$digest_fn($ruleset->{$chain});
2994
2995         $statushash->{$chain}->{sig} = $sig;
2996
2997         my $oldsig = $active_chains->{$chain};
2998         if (!defined($oldsig)) {
2999             $statushash->{$chain}->{action} = 'create';
3000         } else {
3001             if ($oldsig eq $sig) {
3002                 $statushash->{$chain}->{action} = 'exists';
3003             } else {
3004                 $statushash->{$chain}->{action} = 'update';
3005             }
3006         }
3007         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3008         foreach my $cmd (@{$ruleset->{$chain}}) {
3009             print "\t$cmd\n" if $verbose;
3010         }
3011     }
3012
3013     foreach my $chain (sort keys %$active_chains) {
3014         if (!defined($ruleset->{$chain})) {
3015             my $sig = $active_chains->{$chain};
3016             $statushash->{$chain}->{action} = 'delete';
3017             $statushash->{$chain}->{sig} = $sig;
3018             print "delete $chain ($sig)\n" if $verbose;
3019         }
3020     }
3021
3022     return $statushash;
3023 }
3024
3025 sub print_sig_rule {
3026     my ($chain, $sig) = @_;
3027
3028     # We just use this to store a SHA1 checksum used to detect changes
3029     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3030 }
3031
3032 sub get_ruleset_cmdlist {
3033     my ($ruleset, $verbose) = @_;
3034
3035     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3036
3037     my ($active_chains, $hooks) = iptables_get_chains();
3038     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3039
3040     # create missing chains first
3041     foreach my $chain (sort keys %$ruleset) {
3042         my $stat = $statushash->{$chain};
3043         die "internal error" if !$stat;
3044         next if $stat->{action} ne 'create';
3045
3046         $cmdlist .= ":$chain - [0:0]\n";
3047     }
3048
3049     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3050         my $chain = "PVEFW-$h";
3051         if ($ruleset->{$chain} && !$hooks->{$h}) {
3052             $cmdlist .= "-A $h -j $chain\n";
3053         }
3054     }
3055
3056     foreach my $chain (sort keys %$ruleset) {
3057         my $stat = $statushash->{$chain};
3058         die "internal error" if !$stat;
3059
3060         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3061             $cmdlist .= "-F $chain\n";
3062             foreach my $cmd (@{$ruleset->{$chain}}) {
3063                 $cmdlist .= "$cmd\n";
3064             }
3065             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3066         } elsif ($stat->{action} eq 'delete') {
3067             die "internal error"; # this should not happen
3068         } elsif ($stat->{action} eq 'exists') {
3069             # do nothing
3070         } else {
3071             die "internal error - unknown status '$stat->{action}'";
3072         }
3073     }
3074
3075     foreach my $chain (keys %$statushash) {
3076         next if $statushash->{$chain}->{action} ne 'delete';
3077         $cmdlist .= "-F $chain\n";
3078     }
3079     foreach my $chain (keys %$statushash) {
3080         next if $statushash->{$chain}->{action} ne 'delete';
3081         next if $chain eq 'PVEFW-INPUT';
3082         next if $chain eq 'PVEFW-OUTPUT';
3083         next if $chain eq 'PVEFW-FORWARD';
3084         $cmdlist .= "-X $chain\n";
3085     }
3086
3087     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3088
3089     $cmdlist .= "COMMIT\n";
3090
3091     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3092 }
3093
3094 sub get_ipset_cmdlist {
3095     my ($ruleset, $verbose) = @_;
3096
3097     my $cmdlist = "";
3098
3099     my $delete_cmdlist = "";
3100
3101     my $active_chains = ipset_get_chains();
3102     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3103
3104     # remove stale _swap chains
3105     foreach my $chain (keys %$active_chains) {
3106         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3107             $cmdlist .= "destroy $chain\n";
3108         }
3109     }
3110
3111     foreach my $chain (sort keys %$ruleset) {
3112         my $stat = $statushash->{$chain};
3113         die "internal error" if !$stat;
3114
3115         if ($stat->{action} eq 'create') {
3116             foreach my $cmd (@{$ruleset->{$chain}}) {
3117                 $cmdlist .= "$cmd\n";
3118             }
3119         }
3120
3121         if ($stat->{action} eq 'update') {
3122             my $chain_swap = $chain."_swap";
3123
3124             foreach my $cmd (@{$ruleset->{$chain}}) {
3125                 $cmd =~ s/$chain/$chain_swap/;
3126                 $cmdlist .= "$cmd\n";
3127             }
3128             $cmdlist .= "swap $chain_swap $chain\n";
3129             $cmdlist .= "flush $chain_swap\n";
3130             $cmdlist .= "destroy $chain_swap\n";
3131         }
3132
3133     }
3134
3135     foreach my $chain (keys %$statushash) {
3136         next if $statushash->{$chain}->{action} ne 'delete';
3137
3138         $delete_cmdlist .= "flush $chain\n";
3139         $delete_cmdlist .= "destroy $chain\n";
3140     }
3141
3142     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3143
3144     return ($cmdlist, $delete_cmdlist, $changes);
3145 }
3146
3147 sub apply_ruleset {
3148     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3149
3150     enable_bridge_firewall();
3151
3152     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3153         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3154
3155     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3156
3157     if ($verbose) {
3158         if ($ipset_changes) {
3159             print "ipset changes:\n";
3160             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3161             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3162         }
3163
3164         if ($changes) {
3165             print "iptables changes:\n";
3166             print $cmdlist;
3167         }
3168     }
3169
3170     ipset_restore_cmdlist($ipset_create_cmdlist);
3171
3172     iptables_restore_cmdlist($cmdlist);
3173
3174     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3175
3176     # test: re-read status and check if everything is up to date
3177     my $active_chains = iptables_get_chains();
3178     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3179
3180     my $errors;
3181     foreach my $chain (sort keys %$ruleset) {
3182         my $stat = $statushash->{$chain};
3183         if ($stat->{action} ne 'exists') {
3184             warn "unable to update chain '$chain'\n";
3185             $errors = 1;
3186         }
3187     }
3188
3189     die "unable to apply firewall changes\n" if $errors;
3190
3191     update_nf_conntrack_max($hostfw_conf);
3192
3193     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3194
3195 }
3196
3197 sub update_nf_conntrack_max {
3198     my ($hostfw_conf) = @_;
3199
3200     my $max = 65536; # reasonable default
3201
3202     my $options = $hostfw_conf->{options} || {};
3203
3204     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3205         $max = $options->{nf_conntrack_max};
3206         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3207     }
3208
3209     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3210     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3211
3212     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3213
3214     if ($current != $max) {
3215         my $hashsize = int($max/4);
3216         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3217         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3218     }
3219 }
3220
3221 sub update_nf_conntrack_tcp_timeout_established {
3222     my ($hostfw_conf) = @_;
3223
3224     my $options = $hostfw_conf->{options} || {};
3225
3226     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3227
3228     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3229 }
3230
3231 sub remove_pvefw_chains {
3232
3233     my ($chash, $hooks) = iptables_get_chains();
3234     my $cmdlist = "*filter\n";
3235
3236     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3237         if ($hooks->{$h}) {
3238             $cmdlist .= "-D $h -j PVEFW-$h\n";
3239         }
3240     }
3241
3242     foreach my $chain (keys %$chash) {
3243         $cmdlist .= "-F $chain\n";
3244     }
3245
3246     foreach my $chain (keys %$chash) {
3247         $cmdlist .= "-X $chain\n";
3248     }
3249     $cmdlist .= "COMMIT\n";
3250
3251     iptables_restore_cmdlist($cmdlist);
3252
3253     my $ipset_chains = ipset_get_chains();
3254
3255     $cmdlist = "";
3256
3257     foreach my $chain (keys %$ipset_chains) {
3258        $cmdlist .= "flush $chain\n";
3259        $cmdlist .= "destroy $chain\n";
3260     }
3261
3262     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3263 }
3264
3265 sub init {
3266     my $cluster_conf = load_clusterfw_conf();
3267     my $cluster_options = $cluster_conf->{options};
3268     my $enable = $cluster_options->{enable};
3269
3270     return if !$enable;
3271
3272     # load required modules here
3273 }
3274
3275 sub update {
3276     my $code = sub {
3277
3278         my $cluster_conf = load_clusterfw_conf();
3279         my $cluster_options = $cluster_conf->{options};
3280
3281         if (!$cluster_options->{enable}) {
3282             PVE::Firewall::remove_pvefw_chains();
3283             return;
3284         }
3285
3286         my $hostfw_conf = load_hostfw_conf();
3287
3288         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3289
3290         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3291     };
3292
3293     run_locked($code);
3294 }
3295
3296 1;