src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $pvefw_conf_dir = "/etc/pve/firewall";
  23 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  24
  25 # dynamically include PVE::QemuServer and PVE::OpenVZ
  26 # to avoid dependency problems
  27 my $have_qemu_server;
  28 eval {
  29     require PVE::QemuServer;
  30     $have_qemu_server = 1;
  31 };
  32
  33 my $have_pve_manager;
  34 eval {
  35     require PVE::OpenVZ;
  36     $have_pve_manager = 1;
  37 };
  38
  39 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  40 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  41 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  42
  43 my $max_alias_name_length = 64;
  44 my $max_ipset_name_length = 64;
  45 my $max_group_name_length = 20;
  46
  47 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  48 sub pve_verify_ipv4_or_cidr {
  49     my ($cidr, $noerr) = @_;
  50
  51     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  52         return $cidr if Net::IP->new($cidr);
  53         return undef if $noerr;
  54         die Net::IP::Error() . "\n";
  55     }
  56     return undef if $noerr;
  57     die "value does not look like a valid IP address or CIDR network\n";
  58 }
  59
  60 PVE::JSONSchema::register_format('IPv4orCIDRorAlias', \&pve_verify_ipv4_or_cidr_or_alias);
  61 sub pve_verify_ipv4_or_cidr_or_alias {
  62     my ($cidr, $noerr) = @_;
  63
  64     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  65
  66     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  67         return $cidr if Net::IP->new($cidr);
  68         return undef if $noerr;
  69         die Net::IP::Error() . "\n";
  70     }
  71     return undef if $noerr;
  72     die "value does not look like a valid IP address or CIDR network\n";
  73 }
  74
  75 PVE::JSONSchema::register_standard_option('ipset-name', {
  76     description => "IP set name.",
  77     type => 'string',
  78     pattern => $ipset_name_pattern,
  79     minLength => 2,
  80     maxLength => $max_ipset_name_length,
  81 });
  82
  83 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  84     description => "Alias name.",
  85     type => 'string',
  86     pattern => $ip_alias_pattern,
  87     minLength => 2,
  88     maxLength => $max_alias_name_length,
  89 });
  90
  91 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  92     description => "Log level.",
  93     type => 'string',
  94     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  95     optional => 1,
  96 });
  97
  98 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  99     description => "Security Group name.",
 100     type => 'string',
 101     pattern => $security_group_name_pattern,
 102     minLength => 2,
 103     maxLength => $max_group_name_length,
 104 });
 105
 106 my $feature_ipset_nomatch = 0;
 107 eval  {
 108     my (undef, undef, $release) = POSIX::uname();
 109     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 110         my ($major, $minor) = ($1, $2);
 111         $feature_ipset_nomatch = 1 if ($major > 3) ||
 112             ($major == 3 && $minor >= 7);
 113     }
 114
 115 };
 116
 117 use Data::Dumper;
 118
 119 my $nodename = PVE::INotify::nodename();
 120
 121 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 122
 123 my $default_log_level = 'nolog'; # avoid logs by default
 124
 125 my $log_level_hash = {
 126     debug => 7,
 127     info => 6,
 128     notice => 5,
 129     warning => 4,
 130     err => 3,
 131     crit => 2,
 132     alert => 1,
 133     emerg => 0,
 134 };
 135
 136 # imported/converted from: /usr/share/shorewall/macro.*
 137 my $pve_fw_macros = {
 138     'Amanda' => [
 139         "Amanda Backup",
 140         { action => 'PARAM', proto => 'udp', dport => '10080' },
 141         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 142     ],
 143     'Auth' => [
 144         "Auth (identd) traffic",
 145         { action => 'PARAM', proto => 'tcp', dport => '113' },
 146     ],
 147     'BGP' => [
 148         "Border Gateway Protocol traffic",
 149         { action => 'PARAM', proto => 'tcp', dport => '179' },
 150     ],
 151     'BitTorrent' => [
 152         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 153         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 154         { action => 'PARAM', proto => 'udp', dport => '6881' },
 155     ],
 156     'BitTorrent32' => [
 157         "BitTorrent traffic for BitTorrent 3.2 and later",
 158         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 159         { action => 'PARAM', proto => 'udp', dport => '6881' },
 160     ],
 161     'CVS' => [
 162         "Concurrent Versions System pserver traffic",
 163         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 164     ],
 165     'Citrix' => [
 166         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 167         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 168         { action => 'PARAM', proto => 'udp', dport => '1604' },
 169         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 170     ],
 171     'DAAP' => [
 172         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 173         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 174         { action => 'PARAM', proto => 'udp', dport => '3689' },
 175     ],
 176     'DCC' => [
 177         "Distributed Checksum Clearinghouse spam filtering mechanism",
 178         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 179     ],
 180     'DHCPfwd' => [
 181         "Forwarded DHCP traffic",
 182         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 183     ],
 184     'DNS' => [
 185         "Domain Name System traffic (upd and tcp)",
 186         { action => 'PARAM', proto => 'udp', dport => '53' },
 187         { action => 'PARAM', proto => 'tcp', dport => '53' },
 188     ],
 189     'Distcc' => [
 190         "Distributed Compiler service",
 191         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 192     ],
 193     'FTP' => [
 194         "File Transfer Protocol",
 195         { action => 'PARAM', proto => 'tcp', dport => '21' },
 196     ],
 197     'Finger' => [
 198         "Finger protocol (RFC 742)",
 199         { action => 'PARAM', proto => 'tcp', dport => '79' },
 200     ],
 201     'GNUnet' => [
 202         "GNUnet secure peer-to-peer networking traffic",
 203         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 204         { action => 'PARAM', proto => 'udp', dport => '2086' },
 205         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 206         { action => 'PARAM', proto => 'udp', dport => '1080' },
 207     ],
 208     'GRE' => [
 209         "Generic Routing Encapsulation tunneling protocol",
 210         { action => 'PARAM', proto => '47' },
 211     ],
 212     'Git' => [
 213         "Git distributed revision control traffic",
 214         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 215     ],
 216     'HKP' => [
 217         "OpenPGP HTTP keyserver protocol traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 219     ],
 220     'HTTP' => [
 221         "Hypertext Transfer Protocol (WWW)",
 222         { action => 'PARAM', proto => 'tcp', dport => '80' },
 223     ],
 224     'HTTPS' => [
 225         "Hypertext Transfer Protocol (WWW) over SSL",
 226         { action => 'PARAM', proto => 'tcp', dport => '443' },
 227     ],
 228     'ICPV2' => [
 229         "Internet Cache Protocol V2 (Squid) traffic",
 230         { action => 'PARAM', proto => 'udp', dport => '3130' },
 231     ],
 232     'ICQ' => [
 233         "AOL Instant Messenger traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 235     ],
 236     'IMAP' => [
 237         "Internet Message Access Protocol",
 238         { action => 'PARAM', proto => 'tcp', dport => '143' },
 239     ],
 240     'IMAPS' => [
 241         "Internet Message Access Protocol over SSL",
 242         { action => 'PARAM', proto => 'tcp', dport => '993' },
 243     ],
 244     'IPIP' => [
 245         "IPIP capsulation traffic",
 246         { action => 'PARAM', proto => '94' },
 247     ],
 248     'IPsec' => [
 249         "IPsec traffic",
 250         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 251         { action => 'PARAM', proto => '50' },
 252     ],
 253     'IPsecah' => [
 254         "IPsec authentication (AH) traffic",
 255         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 256         { action => 'PARAM', proto => '51' },
 257     ],
 258     'IPsecnat' => [
 259         "IPsec traffic and Nat-Traversal",
 260         { action => 'PARAM', proto => 'udp', dport => '500' },
 261         { action => 'PARAM', proto => 'udp', dport => '4500' },
 262         { action => 'PARAM', proto => '50' },
 263     ],
 264     'IRC' => [
 265         "Internet Relay Chat traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 267     ],
 268     'Jetdirect' => [
 269         "HP Jetdirect printing",
 270         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 271     ],
 272     'L2TP' => [
 273         "Layer 2 Tunneling Protocol traffic",
 274         { action => 'PARAM', proto => 'udp', dport => '1701' },
 275     ],
 276     'LDAP' => [
 277         "Lightweight Directory Access Protocol traffic",
 278         { action => 'PARAM', proto => 'tcp', dport => '389' },
 279     ],
 280     'LDAPS' => [
 281         "Secure Lightweight Directory Access Protocol traffic",
 282         { action => 'PARAM', proto => 'tcp', dport => '636' },
 283     ],
 284     'MSNP' => [
 285         "Microsoft Notification Protocol",
 286         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 287     ],
 288     'MSSQL' => [
 289         "Microsoft SQL Server",
 290         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 291     ],
 292     'Mail' => [
 293         "Mail traffic (SMTP, SMTPS, Submission)",
 294         { action => 'PARAM', proto => 'tcp', dport => '25' },
 295         { action => 'PARAM', proto => 'tcp', dport => '465' },
 296         { action => 'PARAM', proto => 'tcp', dport => '587' },
 297     ],
 298     'Munin' => [
 299         "Munin networked resource monitoring traffic",
 300         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 301     ],
 302     'MySQL' => [
 303         "MySQL server",
 304         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 305     ],
 306     'NNTP' => [
 307         "NNTP traffic (Usenet).",
 308         { action => 'PARAM', proto => 'tcp', dport => '119' },
 309     ],
 310     'NNTPS' => [
 311         "Encrypted NNTP traffic (Usenet)",
 312         { action => 'PARAM', proto => 'tcp', dport => '563' },
 313     ],
 314     'NTP' => [
 315         "Network Time Protocol (ntpd)",
 316         { action => 'PARAM', proto => 'udp', dport => '123' },
 317     ],
 318     'OSPF' => [
 319         "OSPF multicast traffic",
 320         { action => 'PARAM', proto => '89' },
 321     ],
 322     'OpenVPN' => [
 323         "OpenVPN traffic",
 324         { action => 'PARAM', proto => 'udp', dport => '1194' },
 325     ],
 326     'PCA' => [
 327         "Symantec PCAnywere (tm)",
 328         { action => 'PARAM', proto => 'udp', dport => '5632' },
 329         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 330     ],
 331     'POP3' => [
 332         "POP3 traffic",
 333         { action => 'PARAM', proto => 'tcp', dport => '110' },
 334     ],
 335     'POP3S' => [
 336         "Encrypted POP3 traffic",
 337         { action => 'PARAM', proto => 'tcp', dport => '995' },
 338     ],
 339     'PPtP' => [
 340         "Point-to-Point Tunneling Protocol",
 341         { action => 'PARAM', proto => '47' },
 342         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 343     ],
 344     'Ping' => [
 345         "ICMP echo request",
 346         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 347     ],
 348     'PostgreSQL' => [
 349         "PostgreSQL server",
 350         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 351     ],
 352     'Printer' => [
 353         "Line Printer protocol printing",
 354         { action => 'PARAM', proto => 'tcp', dport => '515' },
 355     ],
 356     'RDP' => [
 357         "Microsoft Remote Desktop Protocol traffic",
 358         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 359     ],
 360     'RIP' => [
 361         "Routing Information Protocol (bidirectional)",
 362         { action => 'PARAM', proto => 'udp', dport => '520' },
 363     ],
 364     'RNDC' => [
 365         "BIND remote management protocol",
 366         { action => 'PARAM', proto => 'tcp', dport => '953' },
 367     ],
 368     'Razor' => [
 369         "Razor Antispam System",
 370         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 371     ],
 372     'Rdate' => [
 373         "Remote time retrieval (rdate)",
 374         { action => 'PARAM', proto => 'tcp', dport => '37' },
 375     ],
 376     'Rsync' => [
 377         "Rsync server",
 378         { action => 'PARAM', proto => 'tcp', dport => '873' },
 379     ],
 380     'SANE' => [
 381         "SANE network scanning",
 382         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 383     ],
 384     'SMB' => [
 385         "Microsoft SMB traffic",
 386         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 387         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 388         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 389         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 390     ],
 391     'SMBswat' => [
 392         "Samba Web Administration Tool",
 393         { action => 'PARAM', proto => 'tcp', dport => '901' },
 394     ],
 395     'SMTP' => [
 396         "Simple Mail Transfer Protocol",
 397         { action => 'PARAM', proto => 'tcp', dport => '25' },
 398     ],
 399     'SMTPS' => [
 400         "Encrypted Simple Mail Transfer Protocol",
 401         { action => 'PARAM', proto => 'tcp', dport => '465' },
 402     ],
 403     'SNMP' => [
 404         "Simple Network Management Protocol",
 405         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 406         { action => 'PARAM', proto => 'tcp', dport => '161' },
 407     ],
 408     'SPAMD' => [
 409         "Spam Assassin SPAMD traffic",
 410         { action => 'PARAM', proto => 'tcp', dport => '783' },
 411     ],
 412     'SSH' => [
 413         "Secure shell traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '22' },
 415     ],
 416     'SVN' => [
 417         "Subversion server (svnserve)",
 418         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 419     ],
 420     'SixXS' => [
 421         "SixXS IPv6 Deployment and Tunnel Broker",
 422         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 423         { action => 'PARAM', proto => 'udp', dport => '3740' },
 424         { action => 'PARAM', proto => '41' },
 425         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 426     ],
 427     'Squid' => [
 428         "Squid web proxy traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 430     ],
 431     'Submission' => [
 432         "Mail message submission traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '587' },
 434     ],
 435     'Syslog' => [
 436         "Syslog protocol (RFC 5424) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '514' },
 438         { action => 'PARAM', proto => 'tcp', dport => '514' },
 439     ],
 440     'TFTP' => [
 441         "Trivial File Transfer Protocol traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '69' },
 443     ],
 444     'Telnet' => [
 445         "Telnet traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '23' },
 447     ],
 448     'Telnets' => [
 449         "Telnet over SSL",
 450         { action => 'PARAM', proto => 'tcp', dport => '992' },
 451     ],
 452     'Time' => [
 453         "RFC 868 Time protocol",
 454         { action => 'PARAM', proto => 'tcp', dport => '37' },
 455     ],
 456     'Trcrt' => [
 457         "Traceroute (for up to 30 hops) traffic",
 458         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 459         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 460     ],
 461     'VNC' => [
 462         "VNC traffic for VNC display's 0 - 99",
 463         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 464     ],
 465     'VNCL' => [
 466         "VNC traffic from Vncservers to Vncviewers in listen mode",
 467         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 468     ],
 469     'Web' => [
 470         "WWW traffic (HTTP and HTTPS)",
 471         { action => 'PARAM', proto => 'tcp', dport => '80' },
 472         { action => 'PARAM', proto => 'tcp', dport => '443' },
 473     ],
 474     'Webcache' => [
 475         "Web Cache/Proxy traffic (port 8080)",
 476         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 477     ],
 478     'Webmin' => [
 479         "Webmin traffic",
 480         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 481     ],
 482     'Whois' => [
 483         "Whois (nicname, RFC 3912) traffic",
 484         { action => 'PARAM', proto => 'tcp', dport => '43' },
 485     ],
 486 };
 487
 488 my $pve_fw_parsed_macros;
 489 my $pve_fw_macro_descr;
 490 my $pve_fw_preferred_macro_names = {};
 491
 492 my $pve_std_chains = {};
 493 $pve_std_chains->{4} = {
 494     'PVEFW-SET-ACCEPT-MARK' => [
 495         "-j MARK --set-mark 1",
 496     ],
 497     'PVEFW-DropBroadcast' => [
 498         # same as shorewall 'Broadcast'
 499         # simply DROP BROADCAST/MULTICAST/ANYCAST
 500         # we can use this to reduce logging
 501         { action => 'DROP', dsttype => 'BROADCAST' },
 502         { action => 'DROP', dsttype => 'MULTICAST' },
 503         { action => 'DROP', dsttype => 'ANYCAST' },
 504         { action => 'DROP', dest => '224.0.0.0/4' },
 505     ],
 506     'PVEFW-reject' => [
 507         # same as shorewall 'reject'
 508         { action => 'DROP', dsttype => 'BROADCAST' },
 509         { action => 'DROP', source => '224.0.0.0/4' },
 510         { action => 'DROP', proto => 'icmp' },
 511         "-p tcp -j REJECT --reject-with tcp-reset",
 512         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 513         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 514         "-j REJECT --reject-with icmp-host-prohibited",
 515     ],
 516     'PVEFW-Drop' => [
 517         # same as shorewall 'Drop', which is equal to DROP,
 518         # but REJECT/DROP some packages to reduce logging,
 519         # and ACCEPT critical ICMP types
 520         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 521         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 522         { action => 'PVEFW-DropBroadcast' },
 523         # ACCEPT critical ICMP types
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 526         # Drop packets with INVALID state
 527         "-m conntrack --ctstate INVALID -j DROP",
 528         # Drop Microsoft SMB noise
 529         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 530         { action => 'DROP', proto => 'udp', dport => '137:139'},
 531         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 532         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 533         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 534         # Drop new/NotSyn traffic so that it doesn't get logged
 535         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 536         # Drop DNS replies
 537         { action => 'DROP', proto => 'udp', sport => 53 },
 538     ],
 539     'PVEFW-Reject' => [
 540         # same as shorewall 'Reject', which is equal to Reject,
 541         # but REJECT/DROP some packages to reduce logging,
 542         # and ACCEPT critical ICMP types
 543         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 544         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 545         { action => 'PVEFW-DropBroadcast' },
 546         # ACCEPT critical ICMP types
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 548         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 549         # Drop packets with INVALID state
 550         "-m conntrack --ctstate INVALID -j DROP",
 551         # Drop Microsoft SMB noise
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 554         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 555         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 556         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 557         # Drop new/NotSyn traffic so that it doesn't get logged
 558         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 559         # Drop DNS replies
 560         { action => 'DROP', proto => 'udp', sport => 53 },
 561     ],
 562     'PVEFW-tcpflags' => [
 563         # same as shorewall tcpflags action.
 564         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 568         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 569         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 570     ],
 571     'PVEFW-smurfs' => [
 572         # same as shorewall smurfs action
 573         # Filter packets for smurfs (packets with a broadcast address as the source).
 574         "-s 0.0.0.0/32 -j RETURN",
 575         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 576         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 577     ],
 578 };
 579
 580 # iptables -p icmp -h
 581 my $icmp_type_names = {
 582     any => 1,
 583     'echo-reply' => 1,
 584     'destination-unreachable' => 1,
 585     'network-unreachable' => 1,
 586     'host-unreachable' => 1,
 587     'protocol-unreachable' => 1,
 588     'port-unreachable' => 1,
 589     'fragmentation-needed' => 1,
 590     'source-route-failed' => 1,
 591     'network-unknown' => 1,
 592     'host-unknown' => 1,
 593     'network-prohibited' => 1,
 594     'host-prohibited' => 1,
 595     'TOS-network-unreachable' => 1,
 596     'TOS-host-unreachable' => 1,
 597     'communication-prohibited' => 1,
 598     'host-precedence-violation' => 1,
 599     'precedence-cutoff' => 1,
 600     'source-quench' => 1,
 601     'redirect' => 1,
 602     'network-redirect' => 1,
 603     'host-redirect' => 1,
 604     'TOS-network-redirect' => 1,
 605     'TOS-host-redirect' => 1,
 606     'echo-request' => 1,
 607     'router-advertisement' => 1,
 608     'router-solicitation' => 1,
 609     'time-exceeded' => 1,
 610     'ttl-zero-during-transit' => 1,
 611     'ttl-zero-during-reassembly' => 1,
 612     'parameter-problem' => 1,
 613     'ip-header-bad' => 1,
 614     'required-option-missing' => 1,
 615     'timestamp-request' => 1,
 616     'timestamp-reply' => 1,
 617     'address-mask-request' => 1,
 618     'address-mask-reply' => 1,
 619 };
 620
 621 sub init_firewall_macros {
 622
 623     $pve_fw_parsed_macros = {};
 624
 625     foreach my $k (keys %$pve_fw_macros) {
 626         my $lc_name = lc($k);
 627         my $macro = $pve_fw_macros->{$k};
 628         if (!ref($macro->[0])) {
 629             $pve_fw_macro_descr->{$k} = shift @$macro;
 630         }
 631         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 632         $pve_fw_parsed_macros->{$k} = $macro;
 633     }
 634 }
 635
 636 init_firewall_macros();
 637
 638 sub get_macros {
 639     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 640 }
 641
 642 my $etc_services;
 643
 644 sub get_etc_services {
 645
 646     return $etc_services if $etc_services;
 647
 648     my $filename = "/etc/services";
 649
 650     my $fh = IO::File->new($filename, O_RDONLY);
 651     if (!$fh) {
 652         warn "unable to read '$filename' - $!\n";
 653         return {};
 654     }
 655
 656     my $services = {};
 657
 658     while (my $line = <$fh>) {
 659         chomp ($line);
 660         next if $line =~m/^#/;
 661         next if ($line =~m/^\s*$/);
 662
 663         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 664             $services->{byid}->{$2}->{name} = $1;
 665             $services->{byid}->{$2}->{port} = $2;
 666             $services->{byid}->{$2}->{$3} = 1;
 667             $services->{byname}->{$1} = $services->{byid}->{$2};
 668         }
 669     }
 670
 671     close($fh);
 672
 673     $etc_services = $services;
 674
 675
 676     return $etc_services;
 677 }
 678
 679 my $etc_protocols;
 680
 681 sub get_etc_protocols {
 682     return $etc_protocols if $etc_protocols;
 683
 684     my $filename = "/etc/protocols";
 685
 686     my $fh = IO::File->new($filename, O_RDONLY);
 687     if (!$fh) {
 688         warn "unable to read '$filename' - $!\n";
 689         return {};
 690     }
 691
 692     my $protocols = {};
 693
 694     while (my $line = <$fh>) {
 695         chomp ($line);
 696         next if $line =~m/^#/;
 697         next if ($line =~m/^\s*$/);
 698
 699         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 700             $protocols->{byid}->{$2}->{name} = $1;
 701             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 702         }
 703     }
 704
 705     close($fh);
 706
 707     $etc_protocols = $protocols;
 708
 709     return $etc_protocols;
 710 }
 711
 712 my $ipv4_mask_hash_localnet = {
 713     '255.255.0.0' => 16,
 714     '255.255.128.0' => 17,
 715     '255.255.192.0' => 18,
 716     '255.255.224.0' => 19,
 717     '255.255.240.0' => 20,
 718     '255.255.248.0' => 21,
 719     '255.255.252.0' => 22,
 720     '255.255.254.0' => 23,
 721     '255.255.255.0' => 24,
 722     '255.255.255.128' => 25,
 723     '255.255.255.192' => 26,
 724     '255.255.255.224' => 27,
 725     '255.255.255.240' => 28,
 726     '255.255.255.248' => 29,
 727     '255.255.255.252' => 30,
 728 };
 729
 730 my $__local_network;
 731
 732 sub local_network {
 733     my ($new_value) = @_;
 734
 735     $__local_network = $new_value if defined($new_value);
 736
 737     return $__local_network if defined($__local_network);
 738
 739     eval {
 740         my $nodename = PVE::INotify::nodename();
 741
 742         my $ip = PVE::Cluster::remote_node_ip($nodename);
 743
 744         my $testip = Net::IP->new($ip);
 745
 746         my $routes = PVE::ProcFSTools::read_proc_net_route();
 747         foreach my $entry (@$routes) {
 748             my $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 749             next if !defined($mask);
 750             return if $mask eq '0.0.0.0';
 751             my $cidr = "$entry->{dest}/$mask";
 752             my $testnet = Net::IP->new($cidr);
 753             if ($testnet->overlaps($testip)) {
 754                 $__local_network = $cidr;
 755                 return;
 756             }
 757         }
 758     };
 759     warn $@ if $@;
 760
 761     return $__local_network;
 762 }
 763
 764 # ipset names are limited to 31 characters, and we use '_swap'
 765 # suffix for atomic update, for example PVEFW-${VMID}-${ipset_name}_swap
 766
 767 my $max_iptables_ipset_name_length = 31 - length("_swap");
 768
 769 sub compute_ipset_chain_name {
 770     my ($vmid, $ipset_name) = @_;
 771
 772     $vmid = 0 if !defined($vmid);
 773
 774     my $id = "$vmid-${ipset_name}";
 775
 776
 777     if ((length($id) + 6) > $max_iptables_ipset_name_length) {
 778         $id = PVE::Tools::fnv31a_hex($id);
 779     }
 780
 781     return "PVEFW-$id";
 782 }
 783
 784 sub compute_ipfilter_ipset_name {
 785     my ($iface) = @_;
 786
 787     return "ipfilter-$iface";
 788 }
 789
 790 sub parse_address_list {
 791     my ($str) = @_;
 792
 793     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 794         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 795         return;
 796     }
 797
 798     if ($str =~ m/^${ip_alias_pattern}$/) {
 799         die "alias name too long\n" if length($str) > $max_alias_name_length;
 800         return;
 801     }
 802
 803     my $count = 0;
 804     my $iprange = 0;
 805     my $ipversion;
 806
 807     foreach my $elem (split(/,/, $str)) {
 808         $count++;
 809         my $ip = Net::IP->new($elem);
 810         if (!$ip) {
 811             my $err = Net::IP::Error();
 812             die "invalid IP address: $err\n";
 813         }
 814         $iprange = 1 if $elem =~ m/-/;
 815
 816         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 817
 818         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 819             if defined($ipversion) && ($new_ipversion != $ipversion);
 820
 821         $ipversion = $new_ipversion;
 822     }
 823
 824     die "you can't use a range in a list\n" if $iprange && $count > 1;
 825
 826     return $ipversion;
 827 }
 828
 829 sub parse_port_name_number_or_range {
 830     my ($str) = @_;
 831
 832     my $services = PVE::Firewall::get_etc_services();
 833     my $count = 0;
 834     my $icmp_port = 0;
 835
 836     foreach my $item (split(/,/, $str)) {
 837         $count++;
 838         if ($item =~ m/^(\d+):(\d+)$/) {
 839             my ($port1, $port2) = ($1, $2);
 840             die "invalid port '$port1'\n" if $port1 > 65535;
 841             die "invalid port '$port2'\n" if $port2 > 65535;
 842         } elsif ($item =~ m/^(\d+)$/) {
 843             my $port = $1;
 844             die "invalid port '$port'\n" if $port > 65535;
 845         } else {
 846             if ($icmp_type_names->{$item}) {
 847                 $icmp_port = 1;
 848             } else {
 849                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 850             }
 851         }
 852     }
 853
 854     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 855
 856     return $count;
 857 }
 858
 859 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 860 sub pve_fw_verify_port_spec {
 861    my ($portstr) = @_;
 862
 863    parse_port_name_number_or_range($portstr);
 864
 865    return $portstr;
 866 }
 867
 868 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 869 sub pve_fw_verify_addr_spec {
 870    my ($list) = @_;
 871
 872    parse_address_list($list);
 873
 874    return $list;
 875 }
 876
 877 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 878 sub pve_fw_verify_protocol_spec {
 879    my ($proto) = @_;
 880
 881    my $protocols = get_etc_protocols();
 882
 883    die "unknown protocol '$proto'\n" if $proto &&
 884        !(defined($protocols->{byname}->{$proto}) ||
 885          defined($protocols->{byid}->{$proto}));
 886
 887    return $proto;
 888 }
 889
 890
 891 # helper function for API
 892
 893 sub copy_opject_with_digest {
 894     my ($object) = @_;
 895
 896     my $sha = Digest::SHA->new('sha1');
 897
 898     my $res = {};
 899     foreach my $k (sort keys %$object) {
 900         my $v = $object->{$k};
 901         next if !defined($v);
 902         $res->{$k} = $v;
 903         $sha->add($k, ':', $v, "\n");
 904     }
 905
 906     my $digest = $sha->hexdigest;
 907
 908     $res->{digest} = $digest;
 909
 910     return wantarray ? ($res, $digest) : $res;
 911 }
 912
 913 sub copy_list_with_digest {
 914     my ($list) = @_;
 915
 916     my $sha = Digest::SHA->new('sha1');
 917
 918     my $res = [];
 919     foreach my $entry (@$list) {
 920         my $data = {};
 921         foreach my $k (sort keys %$entry) {
 922             my $v = $entry->{$k};
 923             next if !defined($v);
 924             $data->{$k} = $v;
 925             # Note: digest ignores refs ($rule->{errors})
 926             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 927         }
 928         push @$res, $data;
 929     }
 930
 931     my $digest = $sha->hexdigest;
 932
 933     foreach my $entry (@$res) {
 934         $entry->{digest} = $digest;
 935     }
 936
 937     return wantarray ? ($res, $digest) : $res;
 938 }
 939
 940 my $rule_properties = {
 941     pos => {
 942         description => "Update rule at position <pos>.",
 943         type => 'integer',
 944         minimum => 0,
 945         optional => 1,
 946     },
 947     digest => get_standard_option('pve-config-digest'),
 948     type => {
 949         type => 'string',
 950         optional => 1,
 951         enum => ['in', 'out', 'group'],
 952     },
 953     action => {
 954         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 955         type => 'string',
 956         optional => 1,
 957         pattern => $security_group_name_pattern,
 958         maxLength => 20,
 959         minLength => 2,
 960     },
 961     macro => {
 962         type => 'string',
 963         optional => 1,
 964         maxLength => 128,
 965     },
 966     iface => get_standard_option('pve-iface', { optional => 1 }),
 967     source => {
 968         type => 'string', format => 'pve-fw-addr-spec',
 969         optional => 1,
 970     },
 971     dest => {
 972         type => 'string', format => 'pve-fw-addr-spec',
 973         optional => 1,
 974     },
 975     proto => {
 976         type => 'string', format => 'pve-fw-protocol-spec',
 977         optional => 1,
 978     },
 979     enable => {
 980         type => 'boolean',
 981         optional => 1,
 982     },
 983     sport => {
 984         type => 'string', format => 'pve-fw-port-spec',
 985         optional => 1,
 986     },
 987     dport => {
 988         type => 'string', format => 'pve-fw-port-spec',
 989         optional => 1,
 990     },
 991     comment => {
 992         type => 'string',
 993         optional => 1,
 994     },
 995 };
 996
 997 sub add_rule_properties {
 998     my ($properties) = @_;
 999
1000     foreach my $k (keys %$rule_properties) {
1001         my $h = $rule_properties->{$k};
1002         # copy data, so that we can modify later without side effects
1003         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1004     }
1005
1006     return $properties;
1007 }
1008
1009 sub delete_rule_properties {
1010     my ($rule, $delete_str) = @_;
1011
1012     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1013         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1014             if !defined($rule_properties->{$opt});
1015         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1016             if $opt eq 'type' || $opt eq 'action';
1017         delete $rule->{$opt};
1018     }
1019
1020     return $rule;
1021 }
1022
1023 my $apply_macro = sub {
1024     my ($macro_name, $param, $verify) = @_;
1025
1026     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1027     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1028
1029     my $rules = [];
1030
1031     foreach my $templ (@$macro_rules) {
1032         my $rule = {};
1033         my $param_used = {};
1034         foreach my $k (keys %$templ) {
1035             my $v = $templ->{$k};
1036             if ($v eq 'PARAM') {
1037                 $v = $param->{$k};
1038                 $param_used->{$k} = 1;
1039             } elsif ($v eq 'DEST') {
1040                 $v = $param->{dest};
1041                 $param_used->{dest} = 1;
1042             } elsif ($v eq 'SOURCE') {
1043                 $v = $param->{source};
1044                 $param_used->{source} = 1;
1045             }
1046
1047             if (!defined($v)) {
1048                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1049                 raise_param_exc({ macro => $msg }) if $verify;
1050                 die "$msg\n";
1051             }
1052             $rule->{$k} = $v;
1053         }
1054         foreach my $k (keys %$param) {
1055             next if $k eq 'macro';
1056             next if !defined($param->{$k});
1057             next if $param_used->{$k};
1058             if (defined($rule->{$k})) {
1059                 if ($rule->{$k} ne $param->{$k}) {
1060                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1061                     raise_param_exc({ $k => $msg }) if $verify;
1062                     die "$msg\n";
1063                 }
1064             } else {
1065                 $rule->{$k} = $param->{$k};
1066             }
1067         }
1068         push @$rules, $rule;
1069     }
1070
1071     return $rules;
1072 };
1073
1074 my $rule_env_iface_lookup = {
1075     'ct' => 1,
1076     'vm' => 1,
1077     'group' => 0,
1078     'cluster' => 1,
1079     'host' => 1,
1080 };
1081
1082 sub verify_rule {
1083     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1084
1085     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1086     my $ipversion = undef;
1087
1088     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1089     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1090
1091     my $errors = $rule->{errors} || {};
1092
1093     my $error_count = 0;
1094
1095     my $add_error = sub {
1096         my ($param, $msg)  = @_;
1097         chomp $msg;
1098         raise_param_exc({ $param => $msg }) if !$noerr;
1099         $error_count++;
1100         $errors->{$param} = $msg if !$errors->{$param};
1101     };
1102
1103     my $check_ipset_or_alias_property = sub {
1104         my ($name) = @_;
1105
1106         if (my $value = $rule->{$name}) {
1107             if ($value =~ m/^\+/) {
1108                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1109                     &$add_error($name, "no such ipset '$1'")
1110                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1111
1112                 } else {
1113                     &$add_error($name, "invalid ipset name '$value'");
1114                 }
1115             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1116                 my $alias = lc($value);
1117                 &$add_error($name, "no such alias '$value'")
1118                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1119             }
1120         }
1121     };
1122
1123     my $type = $rule->{type};
1124     my $action = $rule->{action};
1125
1126     &$add_error('type', "missing property") if !$type;
1127     &$add_error('action', "missing property") if !$action;
1128
1129     if ($type) {
1130         if ($type eq  'in' || $type eq 'out') {
1131             &$add_error('action', "unknown action '$action'")
1132                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1133         } elsif ($type eq 'group') {
1134             &$add_error('type', "security groups not allowed")
1135                 if !$allow_groups;
1136             &$add_error('action', "invalid characters in security group name")
1137                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1138         } else {
1139             &$add_error('type', "unknown rule type '$type'");
1140         }
1141     }
1142
1143     if ($rule->{iface}) {
1144         &$add_error('type', "parameter -i not allowed for this rule type")
1145             if !$allow_iface;
1146         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1147         &$add_error('iface', $@) if $@;
1148         if ($rule_env eq 'vm') {
1149             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1150                 if $rule->{iface} !~  m/^net(\d+)$/;
1151         } elsif ($rule_env eq 'ct') {
1152             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1153                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1154         }
1155     }
1156
1157     if ($rule->{macro}) {
1158         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1159             $rule->{macro} = $preferred_name;
1160         } else {
1161             &$add_error('macro', "unknown macro '$rule->{macro}'");
1162         }
1163     }
1164
1165     if ($rule->{proto}) {
1166         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1167         &$add_error('proto', $@) if $@;
1168     }
1169
1170     if ($rule->{dport}) {
1171         eval { parse_port_name_number_or_range($rule->{dport}); };
1172         &$add_error('dport', $@) if $@;
1173         &$add_error('proto', "missing property - 'dport' requires this property")
1174             if !$rule->{proto};
1175     }
1176
1177     if ($rule->{sport}) {
1178         eval { parse_port_name_number_or_range($rule->{sport}); };
1179         &$add_error('sport', $@) if $@;
1180         &$add_error('proto', "missing property - 'sport' requires this property")
1181             if !$rule->{proto};
1182     }
1183
1184     if ($rule->{source}) {
1185         eval { $ipversion = parse_address_list($rule->{source}); };
1186         &$add_error('source', $@) if $@;
1187         &$check_ipset_or_alias_property('source');
1188     }
1189
1190     if ($rule->{dest}) {
1191         eval { $ipversion = parse_address_list($rule->{dest}); };
1192         &$add_error('dest', $@) if $@;
1193         &$check_ipset_or_alias_property('dest');
1194     }
1195
1196     if ($rule->{macro} && !$error_count) {
1197         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1198         if (my $err = $@) {
1199             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1200                 my $eh = $err->{errors};
1201                 foreach my $p (keys %$eh) {
1202                     &$add_error($p, $eh->{$p});
1203                 }
1204             } else {
1205                 &$add_error('macro', "$err");
1206             }
1207         }
1208     }
1209
1210     $rule->{errors} = $errors if $error_count;
1211     $rule->{ipversion} = $ipversion if $ipversion;
1212
1213     return $rule;
1214 }
1215
1216 sub copy_rule_data {
1217     my ($rule, $param) = @_;
1218
1219     foreach my $k (keys %$rule_properties) {
1220         if (defined(my $v = $param->{$k})) {
1221             if ($v eq '' || $v eq '-') {
1222                 delete $rule->{$k};
1223             } else {
1224                 $rule->{$k} = $v;
1225             }
1226         }
1227     }
1228
1229     return $rule;
1230 }
1231
1232 sub rules_modify_permissions {
1233     my ($rule_env) = @_;
1234
1235     if ($rule_env eq 'host') {
1236         return {
1237             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1238         };
1239     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1240         return {
1241             check => ['perm', '/', [ 'Sys.Modify' ]],
1242         };
1243     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1244         return {
1245             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1246         }
1247     }
1248
1249     return undef;
1250 }
1251
1252 sub rules_audit_permissions {
1253     my ($rule_env) = @_;
1254
1255     if ($rule_env eq 'host') {
1256         return {
1257             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1258         };
1259     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1260         return {
1261             check => ['perm', '/', [ 'Sys.Audit' ]],
1262         };
1263     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1264         return {
1265             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1266         }
1267     }
1268
1269     return undef;
1270 }
1271
1272 # core functions
1273 my $bridge_firewall_enabled = 0;
1274
1275 sub enable_bridge_firewall {
1276
1277     return if $bridge_firewall_enabled; # only once
1278
1279     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1280     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1281
1282     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1283     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1284
1285     $bridge_firewall_enabled = 1;
1286 }
1287
1288 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1289
1290 sub iptables_restore_cmdlist {
1291     my ($cmdlist) = @_;
1292
1293     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1294 }
1295
1296 sub ipset_restore_cmdlist {
1297     my ($cmdlist) = @_;
1298
1299     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1300 }
1301
1302 sub iptables_get_chains {
1303
1304     my $res = {};
1305
1306     # check what chains we want to track
1307     my $is_pvefw_chain = sub {
1308         my $name = shift;
1309
1310         return 1 if $name =~ m/^PVEFW-\S+$/;
1311
1312         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1313
1314         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1315
1316         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1317
1318         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1319         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1320
1321         return undef;
1322     };
1323
1324     my $table = '';
1325
1326     my $hooks = {};
1327
1328     my $parser = sub {
1329         my $line = shift;
1330
1331         return if $line =~ m/^#/;
1332         return if $line =~ m/^\s*$/;
1333
1334         if ($line =~ m/^\*(\S+)$/) {
1335             $table = $1;
1336             return;
1337         }
1338
1339         return if $table ne 'filter';
1340
1341         if ($line =~ m/^:(\S+)\s/) {
1342             my $chain = $1;
1343             return if !&$is_pvefw_chain($chain);
1344             $res->{$chain} = "unknown";
1345         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1346             my ($chain, $sig) = ($1, $2);
1347             return if !&$is_pvefw_chain($chain);
1348             $res->{$chain} = $sig;
1349         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1350             $hooks->{$1} = 1;
1351         } else {
1352             # simply ignore the rest
1353             return;
1354         }
1355     };
1356
1357     run_command("/sbin/iptables-save", outfunc => $parser);
1358
1359     return wantarray ? ($res, $hooks) : $res;
1360 }
1361
1362 sub iptables_chain_digest {
1363     my ($rules) = @_;
1364     my $digest = Digest::SHA->new('sha1');
1365     foreach my $rule (@$rules) { # order is important
1366         $digest->add($rule);
1367     }
1368     return $digest->b64digest;
1369 }
1370
1371 sub ipset_chain_digest {
1372     my ($rules) = @_;
1373
1374     my $digest = Digest::SHA->new('sha1');
1375     foreach my $rule (sort @$rules) { # note: sorted
1376         $digest->add($rule);
1377     }
1378     return $digest->b64digest;
1379 }
1380
1381 sub ipset_get_chains {
1382
1383     my $res = {};
1384     my $chains = {};
1385
1386     my $parser = sub {
1387         my $line = shift;
1388
1389         return if $line =~ m/^#/;
1390         return if $line =~ m/^\s*$/;
1391         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1392             my $chain = $1;
1393             $line =~ s/\s+$//; # delete trailing white space
1394             push @{$chains->{$chain}}, $line;
1395         } else {
1396             # simply ignore the rest
1397             return;
1398         }
1399     };
1400
1401     run_command("/usr/sbin/ipset save", outfunc => $parser);
1402
1403     # compute digest for each chain
1404     foreach my $chain (keys %$chains) {
1405         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1406     }
1407
1408     return $res;
1409 }
1410
1411 sub ruleset_generate_cmdstr {
1412     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1413
1414     return if defined($rule->{enable}) && !$rule->{enable};
1415     return if $rule->{errors};
1416
1417     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1418
1419     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1420     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1421
1422     my @cmd = ();
1423
1424     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1425     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1426
1427     my $source = $rule->{source};
1428     my $dest = $rule->{dest};
1429
1430     if ($source) {
1431         if ($source =~ m/^\+/) {
1432             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1433                 my $name = $1;
1434                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1435                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1436                     push @cmd, "-m set --match-set ${ipset_chain} src";
1437                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1438                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1439                     push @cmd, "-m set --match-set ${ipset_chain} src";
1440                 } else {
1441                     die "no such ipset '$name'\n";
1442                 }
1443             } else {
1444                 die "invalid security group name '$source'\n";
1445             }
1446         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1447             my $alias = lc($source);
1448             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1449             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1450             die "no such alias '$source'\n" if !$e;
1451             push @cmd, "-s $e->{cidr}";
1452         } elsif ($source =~ m/\-/){
1453             push @cmd, "-m iprange --src-range $source";
1454         } else {
1455             push @cmd, "-s $source";
1456         }
1457     }
1458
1459     if ($dest) {
1460         if ($dest =~ m/^\+/) {
1461             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1462                 my $name = $1;
1463                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1464                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1465                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1466                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1467                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1468                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1469                 } else {
1470                     die "no such ipset '$name'\n";
1471                 }
1472             } else {
1473                 die "invalid security group name '$dest'\n";
1474             }
1475         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1476             my $alias = lc($dest);
1477             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1478             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1479             die "no such alias '$dest'\n" if !$e;
1480             push @cmd, "-d $e->{cidr}";
1481         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1482             push @cmd, "-m iprange --dst-range $dest";
1483         } else {
1484             push @cmd, "-d $dest";
1485         }
1486     }
1487
1488     if ($rule->{proto}) {
1489         push @cmd, "-p $rule->{proto}";
1490
1491         my $multiport = 0;
1492         $multiport++ if $nbdport > 1;
1493         $multiport++ if $nbsport > 1;
1494
1495         push @cmd, "--match multiport" if $multiport;
1496
1497         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1498             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1499
1500         if ($rule->{dport}) {
1501             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1502                 # Note: we use dport to store --icmp-type
1503                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1504                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1505             } else {
1506                 if ($nbdport > 1) {
1507                     if ($multiport == 2) {
1508                         push @cmd,  "--ports $rule->{dport}";
1509                     } else {
1510                         push @cmd, "--dports $rule->{dport}";
1511                     }
1512                 } else {
1513                     push @cmd, "--dport $rule->{dport}";
1514                 }
1515             }
1516         }
1517
1518         if ($rule->{sport}) {
1519             if ($nbsport > 1) {
1520                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1521             } else {
1522                 push @cmd, "--sport $rule->{sport}";
1523             }
1524         }
1525     } elsif ($rule->{dport} || $rule->{sport}) {
1526         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1527         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1528     }
1529
1530     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1531
1532     if (my $action = $rule->{action}) {
1533         $action = $actions->{$action} if defined($actions->{$action});
1534         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1535         push @cmd, $goto ? "-g $action" : "-j $action";
1536     }
1537
1538     return scalar(@cmd) ? join(' ', @cmd) : undef;
1539 }
1540
1541 sub ruleset_generate_rule {
1542     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1543
1544     my $rules;
1545
1546     if ($rule->{macro}) {
1547         $rules = &$apply_macro($rule->{macro}, $rule);
1548     } else {
1549         $rules = [ $rule ];
1550     }
1551
1552     # update all or nothing
1553
1554     my @cmds = ();
1555     foreach my $tmp (@$rules) {
1556         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1557             push @cmds, $cmdstr;
1558         }
1559     }
1560
1561     foreach my $cmdstr (@cmds) {
1562         ruleset_addrule($ruleset, $chain, $cmdstr);
1563     }
1564 }
1565
1566 sub ruleset_generate_rule_insert {
1567     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1568
1569     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1570
1571     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1572         ruleset_insertrule($ruleset, $chain, $cmdstr);
1573     }
1574 }
1575
1576 sub ruleset_create_chain {
1577     my ($ruleset, $chain) = @_;
1578
1579     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1580     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1581
1582     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1583
1584     $ruleset->{$chain} = [];
1585 }
1586
1587 sub ruleset_chain_exist {
1588     my ($ruleset, $chain) = @_;
1589
1590     return $ruleset->{$chain} ? 1 : undef;
1591 }
1592
1593 sub ruleset_addrule {
1594    my ($ruleset, $chain, $rule) = @_;
1595
1596    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1597
1598    push @{$ruleset->{$chain}}, "-A $chain $rule";
1599 }
1600
1601 sub ruleset_insertrule {
1602    my ($ruleset, $chain, $rule) = @_;
1603
1604    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1605
1606    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1607 }
1608
1609 sub get_log_rule_base {
1610     my ($chain, $vmid, $msg, $loglevel) = @_;
1611
1612     die "internal error - no log level" if !defined($loglevel);
1613
1614     $vmid = 0 if !defined($vmid);
1615
1616     # Note: we use special format for prefix to pass further
1617     # info to log daemon (VMID, LOGVELEL and CHAIN)
1618
1619     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1620 }
1621
1622 sub ruleset_addlog {
1623     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1624
1625     return if !defined($loglevel);
1626
1627     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1628
1629     $logrule = "$rule $logrule" if defined($rule);
1630
1631     ruleset_addrule($ruleset, $chain, $logrule);
1632 }
1633
1634 sub ruleset_add_chain_policy {
1635     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1636
1637     if ($policy eq 'ACCEPT') {
1638
1639         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1640                               { ACCEPT =>  $accept_action});
1641
1642     } elsif ($policy eq 'DROP') {
1643
1644         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1645
1646         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1647
1648         ruleset_addrule($ruleset, $chain, "-j DROP");
1649     } elsif ($policy eq 'REJECT') {
1650         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1651
1652         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1653
1654         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1655     } else {
1656         # should not happen
1657         die "internal error: unknown policy '$policy'";
1658     }
1659 }
1660
1661 sub ruleset_chain_add_conn_filters {
1662     my ($ruleset, $chain, $accept) = @_;
1663
1664     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1665     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1666 }
1667
1668 sub ruleset_chain_add_input_filters {
1669     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1670
1671     if ($cluster_conf->{ipset}->{blacklist}){
1672         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1673             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1674             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1675             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1676         }
1677         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1678         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1679     }
1680
1681     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1682         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1683     }
1684
1685     if ($options->{tcpflags}) {
1686         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1687     }
1688 }
1689
1690 sub ruleset_create_vm_chain {
1691     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1692
1693     ruleset_create_chain($ruleset, $chain);
1694     my $accept = generate_nfqueue($options);
1695
1696     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1697         if ($direction eq 'OUT') {
1698             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1699                                                       proto => 'udp', sport => 68, dport => 67 });
1700         } else {
1701             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1702                                                       proto => 'udp', sport => 67, dport => 68 });
1703         }
1704     }
1705
1706     if ($direction eq 'OUT') {
1707         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1708             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1709         }
1710         if ($ipfilter_ipset) {
1711             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1712         }
1713         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1714     }
1715 }
1716
1717 sub ruleset_add_group_rule {
1718     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1719
1720     my $group = $rule->{action};
1721     my $group_chain = "GROUP-$group-$direction";
1722     if(!ruleset_chain_exist($ruleset, $group_chain)){
1723         generate_group_rules($ruleset, $cluster_conf, $group);
1724     }
1725
1726     if ($direction eq 'OUT' && $rule->{iface_out}) {
1727         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1728     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1729         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1730     } else {
1731         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1732     }
1733
1734     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1735 }
1736
1737 sub ruleset_generate_vm_rules {
1738     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1739
1740     my $lc_direction = lc($direction);
1741
1742     my $in_accept = generate_nfqueue($options);
1743
1744     foreach my $rule (@$rules) {
1745         next if $rule->{iface} && $rule->{iface} ne $netid;
1746         next if !$rule->{enable} || $rule->{errors};
1747         if ($rule->{type} eq 'group') {
1748             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1749                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1750         } else {
1751             next if $rule->{type} ne $lc_direction;
1752             eval {
1753                 if ($direction eq 'OUT') {
1754                     ruleset_generate_rule($ruleset, $chain, $rule,
1755                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1756                                           undef, $cluster_conf, $vmfw_conf);
1757                 } else {
1758                     ruleset_generate_rule($ruleset, $chain, $rule,
1759                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1760                                           undef, $cluster_conf, $vmfw_conf);
1761                 }
1762             };
1763             warn $@ if $@;
1764         }
1765     }
1766 }
1767
1768 sub generate_nfqueue {
1769     my ($options) = @_;
1770
1771     if ($options->{ips}) {
1772         my $action = "NFQUEUE";
1773         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1774             if (defined($3) && defined($1)) {
1775                 $action .= " --queue-balance $1:$3";
1776             } elsif (defined($1)) {
1777                 $action .= " --queue-num $1";
1778             }
1779         }
1780         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1781         return $action;
1782     } else {
1783         return "ACCEPT";
1784     }
1785 }
1786
1787 sub ruleset_generate_vm_ipsrules {
1788     my ($ruleset, $options, $direction, $iface) = @_;
1789
1790     if ($options->{ips} && $direction eq 'IN') {
1791         my $nfqueue = generate_nfqueue($options);
1792
1793         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1794             ruleset_create_chain($ruleset, "PVEFW-IPS");
1795         }
1796
1797         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1798     }
1799 }
1800
1801 sub generate_venet_rules_direction {
1802     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1803
1804     my $lc_direction = lc($direction);
1805
1806     my $rules = $vmfw_conf->{rules};
1807
1808     my $options = $vmfw_conf->{options};
1809     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1810
1811     my $chain = "venet0-$vmid-$direction";
1812
1813     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1814
1815     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1816
1817     # implement policy
1818     my $policy;
1819
1820     if ($direction eq 'OUT') {
1821         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1822     } else {
1823         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1824     }
1825
1826     my $accept = generate_nfqueue($options);
1827     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1828     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1829
1830     if ($direction eq 'OUT') {
1831         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1832             action => $chain,
1833             source => $ip,
1834             iface_in => 'venet0'});
1835     } else {
1836         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1837             action => $chain,
1838             dest => $ip,
1839             iface_out => 'venet0'});
1840     }
1841 }
1842
1843 sub generate_tap_rules_direction {
1844     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1845
1846     my $lc_direction = lc($direction);
1847
1848     my $rules = $vmfw_conf->{rules};
1849
1850     my $options = $vmfw_conf->{options};
1851     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1852
1853     my $tapchain = "$iface-$direction";
1854
1855     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1856     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1857         if $vmfw_conf->{ipset}->{$ipfilter_name};
1858
1859     # create chain with mac and ip filter
1860     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1861
1862     if ($options->{enable}) {
1863         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1864
1865         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1866
1867         # implement policy
1868         my $policy;
1869
1870         if ($direction eq 'OUT') {
1871             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1872         } else {
1873         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1874         }
1875
1876         my $accept = generate_nfqueue($options);
1877         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1878         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1879     } else {
1880         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1881         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1882     }
1883
1884     # plug the tap chain to bridge chain
1885     if ($direction eq 'IN') {
1886         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1887                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1888     } else {
1889         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1890                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1891     }
1892 }
1893
1894 sub enable_host_firewall {
1895     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1896
1897     my $options = $hostfw_conf->{options};
1898     my $cluster_options = $cluster_conf->{options};
1899     my $rules = $hostfw_conf->{rules};
1900     my $cluster_rules = $cluster_conf->{rules};
1901
1902     # host inbound firewall
1903     my $chain = "PVEFW-HOST-IN";
1904     ruleset_create_chain($ruleset, $chain);
1905
1906     my $loglevel = get_option_log_level($options, "log_level_in");
1907
1908     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1909
1910     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1911     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1912
1913     # we use RETURN because we need to check also tap rules
1914     my $accept_action = 'RETURN';
1915
1916     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1917
1918     # add host rules first, so that cluster wide rules can be overwritten
1919     foreach my $rule (@$rules, @$cluster_rules) {
1920         next if !$rule->{enable} || $rule->{errors};
1921
1922         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1923
1924         eval {
1925             if ($rule->{type} eq 'group') {
1926                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1927             } elsif ($rule->{type} eq 'in') {
1928                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1929                                       undef, $cluster_conf, $hostfw_conf);
1930             }
1931         };
1932         warn $@ if $@;
1933         delete $rule->{iface_in};
1934     }
1935
1936     # allow standard traffic for management ipset (includes cluster network)
1937     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1938     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1939     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1940     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1941     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1942     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1943
1944     my $localnet = local_network();
1945
1946     # corosync
1947     if ($localnet) {
1948         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1949         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1950         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1951     }
1952
1953     # implement input policy
1954     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1955     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1956
1957     # host outbound firewall
1958     $chain = "PVEFW-HOST-OUT";
1959     ruleset_create_chain($ruleset, $chain);
1960
1961     $loglevel = get_option_log_level($options, "log_level_out");
1962
1963     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1964
1965     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1966
1967     # we use RETURN because we may want to check other thigs later
1968     $accept_action = 'RETURN';
1969
1970     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1971
1972     # add host rules first, so that cluster wide rules can be overwritten
1973     foreach my $rule (@$rules, @$cluster_rules) {
1974         next if !$rule->{enable} || $rule->{errors};
1975
1976         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1977         eval {
1978             if ($rule->{type} eq 'group') {
1979                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1980             } elsif ($rule->{type} eq 'out') {
1981                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1982                                       undef, $cluster_conf, $hostfw_conf);
1983             }
1984         };
1985         warn $@ if $@;
1986         delete $rule->{iface_out};
1987     }
1988
1989     # allow standard traffic on cluster network
1990     if ($localnet) {
1991         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1992         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1993         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1994         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1995
1996         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1997         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1998         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1999     }
2000
2001     # implement output policy
2002     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2003     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
2004
2005     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2006     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2007 }
2008
2009 sub generate_group_rules {
2010     my ($ruleset, $cluster_conf, $group) = @_;
2011
2012     my $rules = $cluster_conf->{groups}->{$group};
2013
2014     if (!$rules) {
2015         warn "no such security group '$group'\n";
2016         $rules = []; # create empty chain
2017     }
2018
2019     my $chain = "GROUP-${group}-IN";
2020
2021     ruleset_create_chain($ruleset, $chain);
2022     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2023
2024     foreach my $rule (@$rules) {
2025         next if $rule->{type} ne 'in';
2026         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2027     }
2028
2029     $chain = "GROUP-${group}-OUT";
2030
2031     ruleset_create_chain($ruleset, $chain);
2032     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2033
2034     foreach my $rule (@$rules) {
2035         next if $rule->{type} ne 'out';
2036         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2037         # check also other tap rules later
2038         ruleset_generate_rule($ruleset, $chain, $rule,
2039                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2040     }
2041 }
2042
2043 my $MAX_NETS = 32;
2044 my $valid_netdev_names = {};
2045 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2046     $valid_netdev_names->{"net$i"} = 1;
2047 }
2048
2049 sub parse_fw_rule {
2050     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2051
2052     my $orig_line = $line;
2053
2054     my $rule = {};
2055
2056     # we can add single line comments to the end of the rule
2057     if ($line =~ s/#\s*(.*?)\s*$//) {
2058         $rule->{comment} = decode('utf8', $1);
2059     }
2060
2061     # we can disable a rule when prefixed with '|'
2062
2063     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2064
2065     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2066         die "unable to parse rule: $line\n";
2067
2068     $rule->{type} = lc($1);
2069     $rule->{action} = $2;
2070
2071     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2072         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2073             $rule->{macro} = $1;
2074             $rule->{action} = $2;
2075         }
2076     }
2077
2078     while (length($line)) {
2079         if ($line =~ s/^-i (\S+)\s*//) {
2080             $rule->{iface} = $1;
2081             next;
2082         }
2083
2084         last if $rule->{type} eq 'group';
2085
2086         if ($line =~ s/^-p (\S+)\s*//) {
2087             $rule->{proto} = $1;
2088             next;
2089         }
2090
2091         if ($line =~ s/^-dport (\S+)\s*//) {
2092             $rule->{dport} = $1;
2093             next;
2094         }
2095
2096         if ($line =~ s/^-sport (\S+)\s*//) {
2097             $rule->{sport} = $1;
2098             next;
2099         }
2100         if ($line =~ s/^-source (\S+)\s*//) {
2101             $rule->{source} = $1;
2102             next;
2103         }
2104         if ($line =~ s/^-dest (\S+)\s*//) {
2105             $rule->{dest} = $1;
2106             next;
2107         }
2108
2109         last;
2110     }
2111
2112     die "unable to parse rule parameters: $line\n" if length($line);
2113
2114     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2115     if ($verbose && $rule->{errors}) {
2116         warn "$prefix - errors in rule parameters: $orig_line\n";
2117         foreach my $p (keys %{$rule->{errors}}) {
2118             warn "  $p: $rule->{errors}->{$p}\n";
2119         }
2120     }
2121
2122     return $rule;
2123 }
2124
2125 sub parse_vmfw_option {
2126     my ($line) = @_;
2127
2128     my ($opt, $value);
2129
2130     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2131
2132     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2133         $opt = lc($1);
2134         $value = int($2);
2135     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2136         $opt = lc($1);
2137         $value = $2 ? lc($3) : '';
2138     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2139         $opt = lc($1);
2140         $value = uc($3);
2141     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2142         $opt = lc($1);
2143         $value = $2;
2144     } else {
2145         die "can't parse option '$line'\n"
2146     }
2147
2148     return ($opt, $value);
2149 }
2150
2151 sub parse_hostfw_option {
2152     my ($line) = @_;
2153
2154     my ($opt, $value);
2155
2156     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2157
2158     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2159         $opt = lc($1);
2160         $value = int($2);
2161     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2162         $opt = lc($1);
2163         $value = $2 ? lc($3) : '';
2164     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2165         $opt = lc($1);
2166         $value = int($2);
2167     } else {
2168         die "can't parse option '$line'\n"
2169     }
2170
2171     return ($opt, $value);
2172 }
2173
2174 sub parse_clusterfw_option {
2175     my ($line) = @_;
2176
2177     my ($opt, $value);
2178
2179     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2180         $opt = lc($1);
2181         $value = int($2);
2182     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2183         $opt = lc($1);
2184         $value = uc($3);
2185     } else {
2186         die "can't parse option '$line'\n"
2187     }
2188
2189     return ($opt, $value);
2190 }
2191
2192 sub resolve_alias {
2193     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2194
2195     if ($cidr !~ m/^\d/) {
2196         my $alias = lc($cidr);
2197         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2198         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2199         return $e->{cidr} if $e;
2200
2201         die "no such alias '$cidr'\n";
2202     }
2203
2204     return $cidr;
2205 }
2206
2207 sub parse_alias {
2208     my ($line) = @_;
2209
2210     # we can add single line comments to the end of the line
2211     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2212
2213     if ($line =~ m/^(\S+)\s(\S+)$/) {
2214         my ($name, $cidr) = ($1, $2);
2215         $cidr =~ s|/32$||;
2216         pve_verify_ipv4_or_cidr($cidr);
2217         my $data = {
2218             name => $name,
2219             cidr => $cidr,
2220         };
2221         $data->{comment} = $comment  if $comment;
2222         return $data;
2223     }
2224
2225     return undef;
2226 }
2227
2228 sub generic_fw_config_parser {
2229     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2230
2231     my $section;
2232     my $group;
2233
2234     my $res = $empty_conf;
2235
2236     while (defined(my $line = <$fh>)) {
2237         next if $line =~ m/^#/;
2238         next if $line =~ m/^\s*$/;
2239
2240         chomp $line;
2241
2242         my $linenr = $fh->input_line_number();
2243         my $prefix = "$filename (line $linenr)";
2244
2245         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2246             $section = 'options';
2247             next;
2248         }
2249
2250         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2251             $section = 'aliases';
2252             next;
2253         }
2254
2255         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2256             $section = 'groups';
2257             $group = lc($1);
2258             my $comment = $2;
2259             eval {
2260                 die "security group name too long\n" if length($group) > $max_group_name_length;
2261                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2262             };
2263             if (my $err = $@) {
2264                 ($section, $group, $comment) = undef;
2265                 warn "$prefix: $err";
2266                 next;
2267             }
2268
2269             $res->{$section}->{$group} = [];
2270             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2271                 if $comment;
2272             next;
2273         }
2274
2275         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2276             $section = 'rules';
2277             next;
2278         }
2279
2280         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2281             $section = 'ipset';
2282             $group = lc($1);
2283             my $comment = $2;
2284             eval {
2285                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2286                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2287             };
2288             if (my $err = $@) {
2289                 ($section, $group, $comment) = undef;
2290                 warn "$prefix: $err";
2291                 next;
2292             }
2293
2294             $res->{$section}->{$group} = [];
2295             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2296                 if $comment;
2297             next;
2298         }
2299
2300         if (!$section) {
2301             warn "$prefix: skip line - no section\n";
2302             next;
2303         }
2304
2305         if ($section eq 'options') {
2306             eval {
2307                 my ($opt, $value);
2308                 if ($rule_env eq 'cluster') {
2309                     ($opt, $value) = parse_clusterfw_option($line);
2310                 } elsif ($rule_env eq 'host') {
2311                     ($opt, $value) = parse_hostfw_option($line);
2312                 } else {
2313                     ($opt, $value) = parse_vmfw_option($line);
2314                 }
2315                 $res->{options}->{$opt} = $value;
2316             };
2317             warn "$prefix: $@" if $@;
2318         } elsif ($section eq 'aliases') {
2319             eval {
2320                 my $data = parse_alias($line);
2321                 $res->{aliases}->{lc($data->{name})} = $data;
2322             };
2323             warn "$prefix: $@" if $@;
2324         } elsif ($section eq 'rules') {
2325             my $rule;
2326             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2327             if (my $err = $@) {
2328                 warn "$prefix: $err";
2329                 next;
2330             }
2331             push @{$res->{$section}}, $rule;
2332         } elsif ($section eq 'groups') {
2333             my $rule;
2334             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2335             if (my $err = $@) {
2336                 warn "$prefix: $err";
2337                 next;
2338             }
2339             push @{$res->{$section}->{$group}}, $rule;
2340         } elsif ($section eq 'ipset') {
2341             # we can add single line comments to the end of the rule
2342             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2343
2344             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2345             my $nomatch = $1;
2346             my $cidr = $2;
2347             my $errors;
2348
2349             if ($nomatch && !$feature_ipset_nomatch) {
2350                 $errors->{nomatch} = "nomatch not supported by kernel";
2351             }
2352
2353             eval {
2354                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2355                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2356                 } else {
2357                     $cidr =~ s|/32$||;
2358                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2359                 }
2360             };
2361             if (my $err = $@) {
2362                 chomp $err;
2363                 $errors->{cidr} = $err;
2364             }
2365
2366             my $entry = { cidr => $cidr };
2367             $entry->{nomatch} = 1 if $nomatch;
2368             $entry->{comment} = $comment if $comment;
2369             $entry->{errors} =  $errors if $errors;
2370
2371             if ($verbose && $errors) {
2372                 warn "$prefix - errors in ipset '$group': $line\n";
2373                 foreach my $p (keys %{$errors}) {
2374                     warn "  $p: $errors->{$p}\n";
2375                 }
2376             }
2377
2378             push @{$res->{$section}->{$group}}, $entry;
2379         } else {
2380             warn "$prefix: skip line - unknown section\n";
2381             next;
2382         }
2383     }
2384
2385     return $res;
2386 }
2387
2388 sub parse_hostfw_config {
2389     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2390
2391     my $empty_conf = { rules => [], options => {}};
2392
2393     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2394 }
2395
2396 sub parse_vmfw_config {
2397     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2398
2399     my $empty_conf = {
2400         rules => [],
2401         options => {},
2402         aliases => {},
2403         ipset => {} ,
2404         ipset_comments => {},
2405     };
2406
2407     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2408 }
2409
2410 sub parse_clusterfw_config {
2411     my ($filename, $fh, $verbose) = @_;
2412
2413     my $section;
2414     my $group;
2415
2416     my $empty_conf = {
2417         rules => [],
2418         options => {},
2419         aliases => {},
2420         groups => {},
2421         group_comments => {},
2422         ipset => {} ,
2423         ipset_comments => {},
2424     };
2425
2426     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2427 }
2428
2429 sub run_locked {
2430     my ($code, @param) = @_;
2431
2432     my $timeout = 10;
2433
2434     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2435
2436     die $@ if $@;
2437
2438     return $res;
2439 }
2440
2441 sub read_local_vm_config {
2442
2443     my $openvz = {};
2444     my $qemu = {};
2445
2446     my $vmdata = { openvz => $openvz, qemu => $qemu };
2447
2448     my $vmlist = PVE::Cluster::get_vmlist();
2449     return $vmdata if !$vmlist || !$vmlist->{ids};
2450     my $ids = $vmlist->{ids};
2451
2452     foreach my $vmid (keys %$ids) {
2453         next if !$vmid; # skip VE0
2454         my $d = $ids->{$vmid};
2455         next if !$d->{node} || $d->{node} ne $nodename;
2456         next if !$d->{type};
2457         if ($d->{type} eq 'openvz') {
2458             if ($have_pve_manager) {
2459                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2460                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2461                     $openvz->{$vmid} = $conf;
2462                 }
2463             }
2464         } elsif ($d->{type} eq 'qemu') {
2465             if ($have_qemu_server) {
2466                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2467                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2468                     $qemu->{$vmid} = $conf;
2469                 }
2470             }
2471         }
2472     }
2473
2474     return $vmdata;
2475 };
2476
2477 sub load_vmfw_conf {
2478     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2479
2480     my $vmfw_conf = {};
2481
2482     $dir = $pvefw_conf_dir if !defined($dir);
2483
2484     my $filename = "$dir/$vmid.fw";
2485     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2486         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2487         $vmfw_conf->{vmid} = $vmid;
2488     }
2489
2490     return $vmfw_conf;
2491 }
2492
2493 my $format_rules = sub {
2494     my ($rules, $allow_iface) = @_;
2495
2496     my $raw = '';
2497
2498     foreach my $rule (@$rules) {
2499         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2500             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2501             $raw .= uc($rule->{type});
2502             if ($rule->{macro}) {
2503                 $raw .= " $rule->{macro}($rule->{action})";
2504             } else {
2505                 $raw .= " " . $rule->{action};
2506             }
2507             if ($allow_iface && $rule->{iface}) {
2508                 $raw .= " -i $rule->{iface}";
2509             }
2510
2511             if ($rule->{type} ne  'group')  {
2512                 $raw .= " -source $rule->{source}" if $rule->{source};
2513                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2514                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2515                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2516                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2517             }
2518
2519             $raw .= " # " . encode('utf8', $rule->{comment})
2520                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2521             $raw .= "\n";
2522         } else {
2523             die "unknown rule type '$rule->{type}'";
2524         }
2525     }
2526
2527     return $raw;
2528 };
2529
2530 my $format_options = sub {
2531     my ($options) = @_;
2532
2533     my $raw = '';
2534
2535     $raw .= "[OPTIONS]\n\n";
2536     foreach my $opt (keys %$options) {
2537         $raw .= "$opt: $options->{$opt}\n";
2538     }
2539     $raw .= "\n";
2540
2541     return $raw;
2542 };
2543
2544 my $format_aliases = sub {
2545     my ($aliases) = @_;
2546
2547     my $raw = '';
2548
2549     $raw .= "[ALIASES]\n\n";
2550     foreach my $k (keys %$aliases) {
2551         my $e = $aliases->{$k};
2552         $raw .= "$e->{name} $e->{cidr}";
2553         $raw .= " # " . encode('utf8', $e->{comment})
2554             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2555         $raw .= "\n";
2556     }
2557     $raw .= "\n";
2558
2559     return $raw;
2560 };
2561
2562 my $format_ipsets = sub {
2563     my ($fw_conf) = @_;
2564
2565     my $raw = '';
2566
2567     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2568         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2569             my $utf8comment = encode('utf8', $comment);
2570             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2571         } else {
2572             $raw .= "[IPSET $ipset]\n\n";
2573         }
2574         my $options = $fw_conf->{ipset}->{$ipset};
2575
2576         my $nethash = {};
2577         foreach my $entry (@$options) {
2578             $nethash->{$entry->{cidr}} = $entry;
2579         }
2580
2581         foreach my $cidr (sort keys %$nethash) {
2582             my $entry = $nethash->{$cidr};
2583             my $line = $entry->{nomatch} ? '!' : '';
2584             $line .= $entry->{cidr};
2585             $line .= " # " . encode('utf8', $entry->{comment})
2586                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2587             $raw .= "$line\n";
2588         }
2589
2590         $raw .= "\n";
2591     }
2592
2593     return $raw;
2594 };
2595
2596 sub save_vmfw_conf {
2597     my ($vmid, $vmfw_conf) = @_;
2598
2599     my $raw = '';
2600
2601     my $options = $vmfw_conf->{options};
2602     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2603
2604     my $aliases = $vmfw_conf->{aliases};
2605     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2606
2607     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2608
2609     my $rules = $vmfw_conf->{rules} || [];
2610     if ($rules && scalar(@$rules)) {
2611         $raw .= "[RULES]\n\n";
2612         $raw .= &$format_rules($rules, 1);
2613         $raw .= "\n";
2614     }
2615
2616     mkdir $pvefw_conf_dir;
2617
2618     my $filename = "$pvefw_conf_dir/$vmid.fw";
2619     PVE::Tools::file_set_contents($filename, $raw);
2620 }
2621
2622 sub read_vm_firewall_configs {
2623     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2624
2625     my $vmfw_configs = {};
2626
2627     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2628         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2629         next if !$vmfw_conf->{options}; # skip if file does not exists
2630         $vmfw_configs->{$vmid} = $vmfw_conf;
2631     }
2632     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2633         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2634         next if !$vmfw_conf->{options}; # skip if file does not exists
2635         $vmfw_configs->{$vmid} = $vmfw_conf;
2636     }
2637
2638     return $vmfw_configs;
2639 }
2640
2641 sub get_option_log_level {
2642     my ($options, $k) = @_;
2643
2644     my $v = $options->{$k};
2645     $v = $default_log_level if !defined($v);
2646
2647     return undef if $v eq '' || $v eq 'nolog';
2648
2649     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2650
2651     return $v if ($v >= 0) && ($v <= 7);
2652
2653     warn "unknown log level ($k = '$v')\n";
2654
2655     return undef;
2656 }
2657
2658 sub generate_std_chains {
2659     my ($ruleset, $options, $ipversion) = @_;
2660
2661     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2662
2663     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2664
2665     my $chain;
2666
2667     if ($ipversion == 4) {
2668         # same as shorewall smurflog.
2669         $chain = 'PVEFW-smurflog';
2670         $std_chains->{$chain} = [];
2671
2672         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2673         push @{$std_chains->{$chain}}, "-j DROP";
2674     }
2675
2676     # same as shorewall logflags action.
2677     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2678     $chain = 'PVEFW-logflags';
2679     $std_chains->{$chain} = [];
2680
2681     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2682     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2683     push @{$std_chains->{$chain}}, "-j DROP";
2684
2685     foreach my $chain (keys %$std_chains) {
2686         ruleset_create_chain($ruleset, $chain);
2687         foreach my $rule (@{$std_chains->{$chain}}) {
2688             if (ref($rule)) {
2689                 ruleset_generate_rule($ruleset, $chain, $rule);
2690             } else {
2691                 ruleset_addrule($ruleset, $chain, $rule);
2692             }
2693         }
2694     }
2695 }
2696
2697 sub generate_ipset_chains {
2698     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2699
2700     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2701         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2702         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2703     }
2704 }
2705
2706 sub generate_ipset {
2707     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2708
2709     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2710
2711     my $hashsize = scalar(@$options);
2712     if ($hashsize <= 64) {
2713         $hashsize = 64;
2714     } else {
2715         $hashsize = round_powerof2($hashsize);
2716     }
2717
2718     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2719
2720     # remove duplicates
2721     my $nethash = {};
2722     foreach my $entry (@$options) {
2723         next if $entry->{errors}; # skip entries with errors
2724         eval {
2725             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2726             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2727         };
2728         warn $@ if $@;
2729     }
2730
2731     foreach my $cidr (sort keys %$nethash) {
2732         my $entry = $nethash->{$cidr};
2733
2734         my $cmd = "add $name $cidr";
2735         if ($entry->{nomatch}) {
2736             if ($feature_ipset_nomatch) {
2737                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2738             } else {
2739                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2740             }
2741         } else {
2742             push @{$ipset_ruleset->{$name}}, $cmd;
2743         }
2744     }
2745 }
2746
2747 sub round_powerof2 {
2748     my ($int) = @_;
2749
2750     $int--;
2751     $int |= $int >> $_ foreach (1,2,4,8,16);
2752     return ++$int;
2753 }
2754
2755 sub load_clusterfw_conf {
2756     my ($filename, $verbose) = @_;
2757
2758     $filename = $clusterfw_conf_filename if !defined($filename);
2759
2760     my $cluster_conf = {};
2761     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2762         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2763     }
2764
2765     return $cluster_conf;
2766 }
2767
2768 sub save_clusterfw_conf {
2769     my ($cluster_conf) = @_;
2770
2771     my $raw = '';
2772
2773     my $options = $cluster_conf->{options};
2774     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2775
2776     my $aliases = $cluster_conf->{aliases};
2777     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2778
2779     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2780
2781     my $rules = $cluster_conf->{rules};
2782     if ($rules && scalar(@$rules)) {
2783         $raw .= "[RULES]\n\n";
2784         $raw .= &$format_rules($rules, 1);
2785         $raw .= "\n";
2786     }
2787
2788     if ($cluster_conf->{groups}) {
2789         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2790             my $rules = $cluster_conf->{groups}->{$group};
2791             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2792                 my $utf8comment = encode('utf8', $comment);
2793                 $raw .= "[group $group] # $utf8comment\n\n";
2794             } else {
2795                 $raw .= "[group $group]\n\n";
2796             }
2797
2798             $raw .= &$format_rules($rules, 0);
2799             $raw .= "\n";
2800         }
2801     }
2802
2803     mkdir $pvefw_conf_dir;
2804     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2805 }
2806
2807 sub load_hostfw_conf {
2808     my ($cluster_conf, $filename, $verbose) = @_;
2809
2810     $filename = $hostfw_conf_filename if !defined($filename);
2811
2812     my $hostfw_conf = {};
2813     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2814         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2815     }
2816     return $hostfw_conf;
2817 }
2818
2819 sub save_hostfw_conf {
2820     my ($hostfw_conf) = @_;
2821
2822     my $raw = '';
2823
2824     my $options = $hostfw_conf->{options};
2825     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2826
2827     my $rules = $hostfw_conf->{rules};
2828     if ($rules && scalar(@$rules)) {
2829         $raw .= "[RULES]\n\n";
2830         $raw .= &$format_rules($rules, 1);
2831         $raw .= "\n";
2832     }
2833
2834     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2835 }
2836
2837 sub compile {
2838     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2839
2840     my $vmfw_configs;
2841
2842     if ($vmdata) { # test mode
2843         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2844         my $filename = "$testdir/cluster.fw";
2845         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2846
2847         $filename = "$testdir/host.fw";
2848         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2849
2850         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2851     } else { # normal operation
2852         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2853
2854         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2855
2856         $vmdata = read_local_vm_config();
2857         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2858     }
2859
2860     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
2861     return ($ruleset, $ipset_ruleset);
2862 }
2863
2864 sub compile_iptables_filter {
2865     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
2866
2867     $cluster_conf->{ipset}->{venet0} = [];
2868     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2869
2870     my $localnet;
2871     if ($cluster_conf->{aliases}->{local_network}) {
2872         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2873     } else {
2874         $localnet = local_network() || '127.0.0.0/8';
2875         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2876     }
2877
2878     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2879
2880     return ({}, {}) if !$cluster_conf->{options}->{enable};
2881
2882     my $ruleset = {};
2883
2884     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2885     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2886
2887     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2888
2889     my $hostfw_options = $hostfw_conf->{options} || {};
2890
2891     # fixme: what log level should we use here?
2892     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2893
2894     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2895
2896
2897     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2898     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2899     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2900
2901     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2902     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2903
2904     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2905
2906     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2907     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2908
2909     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2910     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2911
2912     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2913
2914     generate_std_chains($ruleset, $hostfw_options, $ipversion);
2915
2916     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2917
2918     my $ipset_ruleset = {};
2919
2920     if ($hostfw_enable) {
2921         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2922         warn $@ if $@; # just to be sure - should not happen
2923     }
2924
2925     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2926
2927     # generate firewall rules for QEMU VMs
2928     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2929         eval {
2930             my $conf = $vmdata->{qemu}->{$vmid};
2931             my $vmfw_conf = $vmfw_configs->{$vmid};
2932             return if !$vmfw_conf;
2933
2934             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2935
2936             foreach my $netid (keys %$conf) {
2937                 next if $netid !~ m/^net(\d+)$/;
2938                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2939                 next if !$net->{firewall};
2940                 my $iface = "tap${vmid}i$1";
2941
2942                 my $macaddr = $net->{macaddr};
2943                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2944                                              $vmfw_conf, $vmid, 'IN');
2945                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2946                                              $vmfw_conf, $vmid, 'OUT');
2947             }
2948         };
2949         warn $@ if $@; # just to be sure - should not happen
2950     }
2951
2952     # generate firewall rules for OpenVZ containers
2953     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2954         eval {
2955             my $conf = $vmdata->{openvz}->{$vmid};
2956
2957             my $vmfw_conf = $vmfw_configs->{$vmid};
2958             return if !$vmfw_conf;
2959
2960             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2961
2962             if ($vmfw_conf->{options}->{enable}) {
2963                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2964                     my $ip = $conf->{ip_address}->{value};
2965                     $ip =~ s/\s+/,/g;
2966                     parse_address_list($ip); # make sure we have a valid $ip list
2967
2968                     my @ips = split(',', $ip);
2969
2970                     foreach my $singleip (@ips) {
2971                         my $venet0ipset = {};
2972                         $venet0ipset->{cidr} = $singleip;
2973                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2974                     }
2975
2976                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2977                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2978                 }
2979             }
2980
2981             if ($conf->{netif} && $conf->{netif}->{value}) {
2982                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2983                 foreach my $netid (keys %$netif) {
2984                     my $d = $netif->{$netid};
2985                     my $bridge = $d->{bridge};
2986                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2987                     my $macaddr = $d->{mac};
2988                     my $iface = $d->{host_ifname};
2989                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2990                                                  $vmfw_conf, $vmid, 'IN');
2991                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2992                                                  $vmfw_conf, $vmid, 'OUT');
2993                 }
2994             }
2995         };
2996         warn $@ if $@; # just to be sure - should not happen
2997     }
2998
2999     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3000         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3001     }
3002
3003     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
3004
3005     return ($ruleset, $ipset_ruleset);
3006 }
3007
3008 sub get_ruleset_status {
3009     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3010
3011     my $statushash = {};
3012
3013     foreach my $chain (sort keys %$ruleset) {
3014         my $sig = &$digest_fn($ruleset->{$chain});
3015
3016         $statushash->{$chain}->{sig} = $sig;
3017
3018         my $oldsig = $active_chains->{$chain};
3019         if (!defined($oldsig)) {
3020             $statushash->{$chain}->{action} = 'create';
3021         } else {
3022             if ($oldsig eq $sig) {
3023                 $statushash->{$chain}->{action} = 'exists';
3024             } else {
3025                 $statushash->{$chain}->{action} = 'update';
3026             }
3027         }
3028         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3029         foreach my $cmd (@{$ruleset->{$chain}}) {
3030             print "\t$cmd\n" if $verbose;
3031         }
3032     }
3033
3034     foreach my $chain (sort keys %$active_chains) {
3035         if (!defined($ruleset->{$chain})) {
3036             my $sig = $active_chains->{$chain};
3037             $statushash->{$chain}->{action} = 'delete';
3038             $statushash->{$chain}->{sig} = $sig;
3039             print "delete $chain ($sig)\n" if $verbose;
3040         }
3041     }
3042
3043     return $statushash;
3044 }
3045
3046 sub print_sig_rule {
3047     my ($chain, $sig) = @_;
3048
3049     # We just use this to store a SHA1 checksum used to detect changes
3050     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3051 }
3052
3053 sub get_ruleset_cmdlist {
3054     my ($ruleset, $verbose) = @_;
3055
3056     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3057
3058     my ($active_chains, $hooks) = iptables_get_chains();
3059     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3060
3061     # create missing chains first
3062     foreach my $chain (sort keys %$ruleset) {
3063         my $stat = $statushash->{$chain};
3064         die "internal error" if !$stat;
3065         next if $stat->{action} ne 'create';
3066
3067         $cmdlist .= ":$chain - [0:0]\n";
3068     }
3069
3070     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3071         my $chain = "PVEFW-$h";
3072         if ($ruleset->{$chain} && !$hooks->{$h}) {
3073             $cmdlist .= "-A $h -j $chain\n";
3074         }
3075     }
3076
3077     foreach my $chain (sort keys %$ruleset) {
3078         my $stat = $statushash->{$chain};
3079         die "internal error" if !$stat;
3080
3081         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3082             $cmdlist .= "-F $chain\n";
3083             foreach my $cmd (@{$ruleset->{$chain}}) {
3084                 $cmdlist .= "$cmd\n";
3085             }
3086             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3087         } elsif ($stat->{action} eq 'delete') {
3088             die "internal error"; # this should not happen
3089         } elsif ($stat->{action} eq 'exists') {
3090             # do nothing
3091         } else {
3092             die "internal error - unknown status '$stat->{action}'";
3093         }
3094     }
3095
3096     foreach my $chain (keys %$statushash) {
3097         next if $statushash->{$chain}->{action} ne 'delete';
3098         $cmdlist .= "-F $chain\n";
3099     }
3100     foreach my $chain (keys %$statushash) {
3101         next if $statushash->{$chain}->{action} ne 'delete';
3102         next if $chain eq 'PVEFW-INPUT';
3103         next if $chain eq 'PVEFW-OUTPUT';
3104         next if $chain eq 'PVEFW-FORWARD';
3105         $cmdlist .= "-X $chain\n";
3106     }
3107
3108     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3109
3110     $cmdlist .= "COMMIT\n";
3111
3112     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3113 }
3114
3115 sub get_ipset_cmdlist {
3116     my ($ruleset, $verbose) = @_;
3117
3118     my $cmdlist = "";
3119
3120     my $delete_cmdlist = "";
3121
3122     my $active_chains = ipset_get_chains();
3123     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3124
3125     # remove stale _swap chains
3126     foreach my $chain (keys %$active_chains) {
3127         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3128             $cmdlist .= "destroy $chain\n";
3129         }
3130     }
3131
3132     foreach my $chain (sort keys %$ruleset) {
3133         my $stat = $statushash->{$chain};
3134         die "internal error" if !$stat;
3135
3136         if ($stat->{action} eq 'create') {
3137             foreach my $cmd (@{$ruleset->{$chain}}) {
3138                 $cmdlist .= "$cmd\n";
3139             }
3140         }
3141
3142         if ($stat->{action} eq 'update') {
3143             my $chain_swap = $chain."_swap";
3144
3145             foreach my $cmd (@{$ruleset->{$chain}}) {
3146                 $cmd =~ s/$chain/$chain_swap/;
3147                 $cmdlist .= "$cmd\n";
3148             }
3149             $cmdlist .= "swap $chain_swap $chain\n";
3150             $cmdlist .= "flush $chain_swap\n";
3151             $cmdlist .= "destroy $chain_swap\n";
3152         }
3153
3154     }
3155
3156     foreach my $chain (keys %$statushash) {
3157         next if $statushash->{$chain}->{action} ne 'delete';
3158
3159         $delete_cmdlist .= "flush $chain\n";
3160         $delete_cmdlist .= "destroy $chain\n";
3161     }
3162
3163     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3164
3165     return ($cmdlist, $delete_cmdlist, $changes);
3166 }
3167
3168 sub apply_ruleset {
3169     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3170
3171     enable_bridge_firewall();
3172
3173     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3174         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3175
3176     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3177
3178     if ($verbose) {
3179         if ($ipset_changes) {
3180             print "ipset changes:\n";
3181             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3182             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3183         }
3184
3185         if ($changes) {
3186             print "iptables changes:\n";
3187             print $cmdlist;
3188         }
3189     }
3190
3191     ipset_restore_cmdlist($ipset_create_cmdlist);
3192
3193     iptables_restore_cmdlist($cmdlist);
3194
3195     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3196
3197     # test: re-read status and check if everything is up to date
3198     my $active_chains = iptables_get_chains();
3199     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3200
3201     my $errors;
3202     foreach my $chain (sort keys %$ruleset) {
3203         my $stat = $statushash->{$chain};
3204         if ($stat->{action} ne 'exists') {
3205             warn "unable to update chain '$chain'\n";
3206             $errors = 1;
3207         }
3208     }
3209
3210     die "unable to apply firewall changes\n" if $errors;
3211
3212     update_nf_conntrack_max($hostfw_conf);
3213
3214     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3215
3216 }
3217
3218 sub update_nf_conntrack_max {
3219     my ($hostfw_conf) = @_;
3220
3221     my $max = 65536; # reasonable default
3222
3223     my $options = $hostfw_conf->{options} || {};
3224
3225     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3226         $max = $options->{nf_conntrack_max};
3227         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3228     }
3229
3230     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3231     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3232
3233     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3234
3235     if ($current != $max) {
3236         my $hashsize = int($max/4);
3237         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3238         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3239     }
3240 }
3241
3242 sub update_nf_conntrack_tcp_timeout_established {
3243     my ($hostfw_conf) = @_;
3244
3245     my $options = $hostfw_conf->{options} || {};
3246
3247     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3248
3249     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3250 }
3251
3252 sub remove_pvefw_chains {
3253
3254     my ($chash, $hooks) = iptables_get_chains();
3255     my $cmdlist = "*filter\n";
3256
3257     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3258         if ($hooks->{$h}) {
3259             $cmdlist .= "-D $h -j PVEFW-$h\n";
3260         }
3261     }
3262
3263     foreach my $chain (keys %$chash) {
3264         $cmdlist .= "-F $chain\n";
3265     }
3266
3267     foreach my $chain (keys %$chash) {
3268         $cmdlist .= "-X $chain\n";
3269     }
3270     $cmdlist .= "COMMIT\n";
3271
3272     iptables_restore_cmdlist($cmdlist);
3273
3274     my $ipset_chains = ipset_get_chains();
3275
3276     $cmdlist = "";
3277
3278     foreach my $chain (keys %$ipset_chains) {
3279        $cmdlist .= "flush $chain\n";
3280        $cmdlist .= "destroy $chain\n";
3281     }
3282
3283     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3284 }
3285
3286 sub init {
3287     my $cluster_conf = load_clusterfw_conf();
3288     my $cluster_options = $cluster_conf->{options};
3289     my $enable = $cluster_options->{enable};
3290
3291     return if !$enable;
3292
3293     # load required modules here
3294 }
3295
3296 sub update {
3297     my $code = sub {
3298
3299         my $cluster_conf = load_clusterfw_conf();
3300         my $cluster_options = $cluster_conf->{options};
3301
3302         if (!$cluster_options->{enable}) {
3303             PVE::Firewall::remove_pvefw_chains();
3304             return;
3305         }
3306
3307         my $hostfw_conf = load_hostfw_conf();
3308
3309         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3310
3311         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3312     };
3313
3314     run_locked($code);
3315 }
3316
3317 1;