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 = undef;
 806
 807     foreach my $elem (split(/,/, $str)) {
 808         $count++;
 809         if (!Net::IP->new($elem)) {
 810             my $err = Net::IP::Error();
 811             die "invalid IP address: $err\n";
 812         }
 813         $iprange = 1 if $elem =~ m/-/;
 814         $ipversion = Net::IP::ip_get_version($elem); #fixme : don't work with range
 815     }
 816
 817     die "you can use a range in a list\n" if $iprange && $count > 1;
 818     return $ipversion;
 819 }
 820
 821 sub parse_port_name_number_or_range {
 822     my ($str) = @_;
 823
 824     my $services = PVE::Firewall::get_etc_services();
 825     my $count = 0;
 826     my $icmp_port = 0;
 827
 828     foreach my $item (split(/,/, $str)) {
 829         $count++;
 830         if ($item =~ m/^(\d+):(\d+)$/) {
 831             my ($port1, $port2) = ($1, $2);
 832             die "invalid port '$port1'\n" if $port1 > 65535;
 833             die "invalid port '$port2'\n" if $port2 > 65535;
 834         } elsif ($item =~ m/^(\d+)$/) {
 835             my $port = $1;
 836             die "invalid port '$port'\n" if $port > 65535;
 837         } else {
 838             if ($icmp_type_names->{$item}) {
 839                 $icmp_port = 1;
 840             } else {
 841                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 842             }
 843         }
 844     }
 845
 846     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 847
 848     return $count;
 849 }
 850
 851 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 852 sub pve_fw_verify_port_spec {
 853    my ($portstr) = @_;
 854
 855    parse_port_name_number_or_range($portstr);
 856
 857    return $portstr;
 858 }
 859
 860 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
 861 sub pve_fw_verify_addr_spec {
 862    my ($list) = @_;
 863
 864    parse_address_list($list);
 865
 866    return $list;
 867 }
 868
 869 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 870 sub pve_fw_verify_protocol_spec {
 871    my ($proto) = @_;
 872
 873    my $protocols = get_etc_protocols();
 874
 875    die "unknown protocol '$proto'\n" if $proto &&
 876        !(defined($protocols->{byname}->{$proto}) ||
 877          defined($protocols->{byid}->{$proto}));
 878
 879    return $proto;
 880 }
 881
 882
 883 # helper function for API
 884
 885 sub copy_opject_with_digest {
 886     my ($object) = @_;
 887
 888     my $sha = Digest::SHA->new('sha1');
 889
 890     my $res = {};
 891     foreach my $k (sort keys %$object) {
 892         my $v = $object->{$k};
 893         next if !defined($v);
 894         $res->{$k} = $v;
 895         $sha->add($k, ':', $v, "\n");
 896     }
 897
 898     my $digest = $sha->hexdigest;
 899
 900     $res->{digest} = $digest;
 901
 902     return wantarray ? ($res, $digest) : $res;
 903 }
 904
 905 sub copy_list_with_digest {
 906     my ($list) = @_;
 907
 908     my $sha = Digest::SHA->new('sha1');
 909
 910     my $res = [];
 911     foreach my $entry (@$list) {
 912         my $data = {};
 913         foreach my $k (sort keys %$entry) {
 914             my $v = $entry->{$k};
 915             next if !defined($v);
 916             $data->{$k} = $v;
 917             # Note: digest ignores refs ($rule->{errors})
 918             $sha->add($k, ':', $v, "\n") if !ref($v); ;
 919         }
 920         push @$res, $data;
 921     }
 922
 923     my $digest = $sha->hexdigest;
 924
 925     foreach my $entry (@$res) {
 926         $entry->{digest} = $digest;
 927     }
 928
 929     return wantarray ? ($res, $digest) : $res;
 930 }
 931
 932 my $rule_properties = {
 933     pos => {
 934         description => "Update rule at position <pos>.",
 935         type => 'integer',
 936         minimum => 0,
 937         optional => 1,
 938     },
 939     digest => get_standard_option('pve-config-digest'),
 940     type => {
 941         type => 'string',
 942         optional => 1,
 943         enum => ['in', 'out', 'group'],
 944     },
 945     action => {
 946         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 947         type => 'string',
 948         optional => 1,
 949         pattern => $security_group_name_pattern,
 950         maxLength => 20,
 951         minLength => 2,
 952     },
 953     macro => {
 954         type => 'string',
 955         optional => 1,
 956         maxLength => 128,
 957     },
 958     iface => get_standard_option('pve-iface', { optional => 1 }),
 959     source => {
 960         type => 'string', format => 'pve-fw-addr-spec',
 961         optional => 1,
 962     },
 963     dest => {
 964         type => 'string', format => 'pve-fw-addr-spec',
 965         optional => 1,
 966     },
 967     proto => {
 968         type => 'string', format => 'pve-fw-protocol-spec',
 969         optional => 1,
 970     },
 971     enable => {
 972         type => 'boolean',
 973         optional => 1,
 974     },
 975     sport => {
 976         type => 'string', format => 'pve-fw-port-spec',
 977         optional => 1,
 978     },
 979     dport => {
 980         type => 'string', format => 'pve-fw-port-spec',
 981         optional => 1,
 982     },
 983     comment => {
 984         type => 'string',
 985         optional => 1,
 986     },
 987 };
 988
 989 sub add_rule_properties {
 990     my ($properties) = @_;
 991
 992     foreach my $k (keys %$rule_properties) {
 993         my $h = $rule_properties->{$k};
 994         # copy data, so that we can modify later without side effects
 995         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 996     }
 997
 998     return $properties;
 999 }
1000
1001 sub delete_rule_properties {
1002     my ($rule, $delete_str) = @_;
1003
1004     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1005         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1006             if !defined($rule_properties->{$opt});
1007         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1008             if $opt eq 'type' || $opt eq 'action';
1009         delete $rule->{$opt};
1010     }
1011
1012     return $rule;
1013 }
1014
1015 my $apply_macro = sub {
1016     my ($macro_name, $param, $verify) = @_;
1017
1018     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1019     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1020
1021     my $rules = [];
1022
1023     foreach my $templ (@$macro_rules) {
1024         my $rule = {};
1025         my $param_used = {};
1026         foreach my $k (keys %$templ) {
1027             my $v = $templ->{$k};
1028             if ($v eq 'PARAM') {
1029                 $v = $param->{$k};
1030                 $param_used->{$k} = 1;
1031             } elsif ($v eq 'DEST') {
1032                 $v = $param->{dest};
1033                 $param_used->{dest} = 1;
1034             } elsif ($v eq 'SOURCE') {
1035                 $v = $param->{source};
1036                 $param_used->{source} = 1;
1037             }
1038
1039             if (!defined($v)) {
1040                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1041                 raise_param_exc({ macro => $msg }) if $verify;
1042                 die "$msg\n";
1043             }
1044             $rule->{$k} = $v;
1045         }
1046         foreach my $k (keys %$param) {
1047             next if $k eq 'macro';
1048             next if !defined($param->{$k});
1049             next if $param_used->{$k};
1050             if (defined($rule->{$k})) {
1051                 if ($rule->{$k} ne $param->{$k}) {
1052                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1053                     raise_param_exc({ $k => $msg }) if $verify;
1054                     die "$msg\n";
1055                 }
1056             } else {
1057                 $rule->{$k} = $param->{$k};
1058             }
1059         }
1060         push @$rules, $rule;
1061     }
1062
1063     return $rules;
1064 };
1065
1066 my $rule_env_iface_lookup = {
1067     'ct' => 1,
1068     'vm' => 1,
1069     'group' => 0,
1070     'cluster' => 1,
1071     'host' => 1,
1072 };
1073
1074 sub verify_rule {
1075     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1076
1077     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1078     my $ipversion = undef;
1079
1080     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1081     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1082
1083     my $errors = $rule->{errors} || {};
1084
1085     my $error_count = 0;
1086
1087     my $add_error = sub {
1088         my ($param, $msg)  = @_;
1089         chomp $msg;
1090         raise_param_exc({ $param => $msg }) if !$noerr;
1091         $error_count++;
1092         $errors->{$param} = $msg if !$errors->{$param};
1093     };
1094
1095     my $check_ipset_or_alias_property = sub {
1096         my ($name) = @_;
1097
1098         if (my $value = $rule->{$name}) {
1099             if ($value =~ m/^\+/) {
1100                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1101                     &$add_error($name, "no such ipset '$1'")
1102                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1103
1104                 } else {
1105                     &$add_error($name, "invalid ipset name '$value'");
1106                 }
1107             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1108                 my $alias = lc($value);
1109                 &$add_error($name, "no such alias '$value'")
1110                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}))
1111             }
1112         }
1113     };
1114
1115     my $type = $rule->{type};
1116     my $action = $rule->{action};
1117
1118     &$add_error('type', "missing property") if !$type;
1119     &$add_error('action', "missing property") if !$action;
1120
1121     if ($type) {
1122         if ($type eq  'in' || $type eq 'out') {
1123             &$add_error('action', "unknown action '$action'")
1124                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1125         } elsif ($type eq 'group') {
1126             &$add_error('type', "security groups not allowed")
1127                 if !$allow_groups;
1128             &$add_error('action', "invalid characters in security group name")
1129                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1130         } else {
1131             &$add_error('type', "unknown rule type '$type'");
1132         }
1133     }
1134
1135     if ($rule->{iface}) {
1136         &$add_error('type', "parameter -i not allowed for this rule type")
1137             if !$allow_iface;
1138         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1139         &$add_error('iface', $@) if $@;
1140         if ($rule_env eq 'vm') {
1141             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1142                 if $rule->{iface} !~  m/^net(\d+)$/;
1143         } elsif ($rule_env eq 'ct') {
1144             &$add_error('iface', "value does not match the regex pattern '(venet|eth\\d+)'")
1145                 if $rule->{iface} !~  m/^(venet|eth(\d+))$/;
1146         }
1147     }
1148
1149     if ($rule->{macro}) {
1150         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1151             $rule->{macro} = $preferred_name;
1152         } else {
1153             &$add_error('macro', "unknown macro '$rule->{macro}'");
1154         }
1155     }
1156
1157     if ($rule->{proto}) {
1158         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1159         &$add_error('proto', $@) if $@;
1160     }
1161
1162     if ($rule->{dport}) {
1163         eval { parse_port_name_number_or_range($rule->{dport}); };
1164         &$add_error('dport', $@) if $@;
1165         &$add_error('proto', "missing property - 'dport' requires this property")
1166             if !$rule->{proto};
1167     }
1168
1169     if ($rule->{sport}) {
1170         eval { parse_port_name_number_or_range($rule->{sport}); };
1171         &$add_error('sport', $@) if $@;
1172         &$add_error('proto', "missing property - 'sport' requires this property")
1173             if !$rule->{proto};
1174     }
1175
1176     if ($rule->{source}) {
1177         eval { $ipversion = parse_address_list($rule->{source}); };
1178         &$add_error('source', $@) if $@;
1179         &$check_ipset_or_alias_property('source');
1180     }
1181
1182     if ($rule->{dest}) {
1183         eval { $ipversion = parse_address_list($rule->{dest}); };
1184         &$add_error('dest', $@) if $@;
1185         &$check_ipset_or_alias_property('dest');
1186     }
1187
1188     if ($rule->{macro} && !$error_count) {
1189         eval { &$apply_macro($rule->{macro}, $rule, 1); };
1190         if (my $err = $@) {
1191             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1192                 my $eh = $err->{errors};
1193                 foreach my $p (keys %$eh) {
1194                     &$add_error($p, $eh->{$p});
1195                 }
1196             } else {
1197                 &$add_error('macro', "$err");
1198             }
1199         }
1200     }
1201
1202     $rule->{errors} = $errors if $error_count;
1203     $rule->{ipversion} = $ipversion if $ipversion;
1204
1205     return $rule;
1206 }
1207
1208 sub copy_rule_data {
1209     my ($rule, $param) = @_;
1210
1211     foreach my $k (keys %$rule_properties) {
1212         if (defined(my $v = $param->{$k})) {
1213             if ($v eq '' || $v eq '-') {
1214                 delete $rule->{$k};
1215             } else {
1216                 $rule->{$k} = $v;
1217             }
1218         }
1219     }
1220
1221     return $rule;
1222 }
1223
1224 sub rules_modify_permissions {
1225     my ($rule_env) = @_;
1226
1227     if ($rule_env eq 'host') {
1228         return {
1229             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1230         };
1231     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1232         return {
1233             check => ['perm', '/', [ 'Sys.Modify' ]],
1234         };
1235     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1236         return {
1237             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1238         }
1239     }
1240
1241     return undef;
1242 }
1243
1244 sub rules_audit_permissions {
1245     my ($rule_env) = @_;
1246
1247     if ($rule_env eq 'host') {
1248         return {
1249             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1250         };
1251     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1252         return {
1253             check => ['perm', '/', [ 'Sys.Audit' ]],
1254         };
1255     } elsif ($rule_env eq 'vm' ||   $rule_env eq 'ct') {
1256         return {
1257             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1258         }
1259     }
1260
1261     return undef;
1262 }
1263
1264 # core functions
1265 my $bridge_firewall_enabled = 0;
1266
1267 sub enable_bridge_firewall {
1268
1269     return if $bridge_firewall_enabled; # only once
1270
1271     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1272     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1273
1274     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1275     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1276
1277     $bridge_firewall_enabled = 1;
1278 }
1279
1280 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1281
1282 sub iptables_restore_cmdlist {
1283     my ($cmdlist) = @_;
1284
1285     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1286 }
1287
1288 sub ipset_restore_cmdlist {
1289     my ($cmdlist) = @_;
1290
1291     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1292 }
1293
1294 sub iptables_get_chains {
1295
1296     my $res = {};
1297
1298     # check what chains we want to track
1299     my $is_pvefw_chain = sub {
1300         my $name = shift;
1301
1302         return 1 if $name =~ m/^PVEFW-\S+$/;
1303
1304         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1305
1306         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1307
1308         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1309
1310         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1311         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1312
1313         return undef;
1314     };
1315
1316     my $table = '';
1317
1318     my $hooks = {};
1319
1320     my $parser = sub {
1321         my $line = shift;
1322
1323         return if $line =~ m/^#/;
1324         return if $line =~ m/^\s*$/;
1325
1326         if ($line =~ m/^\*(\S+)$/) {
1327             $table = $1;
1328             return;
1329         }
1330
1331         return if $table ne 'filter';
1332
1333         if ($line =~ m/^:(\S+)\s/) {
1334             my $chain = $1;
1335             return if !&$is_pvefw_chain($chain);
1336             $res->{$chain} = "unknown";
1337         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1338             my ($chain, $sig) = ($1, $2);
1339             return if !&$is_pvefw_chain($chain);
1340             $res->{$chain} = $sig;
1341         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1342             $hooks->{$1} = 1;
1343         } else {
1344             # simply ignore the rest
1345             return;
1346         }
1347     };
1348
1349     run_command("/sbin/iptables-save", outfunc => $parser);
1350
1351     return wantarray ? ($res, $hooks) : $res;
1352 }
1353
1354 sub iptables_chain_digest {
1355     my ($rules) = @_;
1356     my $digest = Digest::SHA->new('sha1');
1357     foreach my $rule (@$rules) { # order is important
1358         $digest->add($rule);
1359     }
1360     return $digest->b64digest;
1361 }
1362
1363 sub ipset_chain_digest {
1364     my ($rules) = @_;
1365
1366     my $digest = Digest::SHA->new('sha1');
1367     foreach my $rule (sort @$rules) { # note: sorted
1368         $digest->add($rule);
1369     }
1370     return $digest->b64digest;
1371 }
1372
1373 sub ipset_get_chains {
1374
1375     my $res = {};
1376     my $chains = {};
1377
1378     my $parser = sub {
1379         my $line = shift;
1380
1381         return if $line =~ m/^#/;
1382         return if $line =~ m/^\s*$/;
1383         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1384             my $chain = $1;
1385             $line =~ s/\s+$//; # delete trailing white space
1386             push @{$chains->{$chain}}, $line;
1387         } else {
1388             # simply ignore the rest
1389             return;
1390         }
1391     };
1392
1393     run_command("/usr/sbin/ipset save", outfunc => $parser);
1394
1395     # compute digest for each chain
1396     foreach my $chain (keys %$chains) {
1397         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1398     }
1399
1400     return $res;
1401 }
1402
1403 sub ruleset_generate_cmdstr {
1404     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1405
1406     return if defined($rule->{enable}) && !$rule->{enable};
1407     return if $rule->{errors};
1408
1409     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1410
1411     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1412     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1413
1414     my @cmd = ();
1415
1416     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1417     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1418
1419     my $source = $rule->{source};
1420     my $dest = $rule->{dest};
1421
1422     if ($source) {
1423         if ($source =~ m/^\+/) {
1424             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1425                 my $name = $1;
1426                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1427                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1428                     push @cmd, "-m set --match-set ${ipset_chain} src";
1429                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1430                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1431                     push @cmd, "-m set --match-set ${ipset_chain} src";
1432                 } else {
1433                     die "no such ipset '$name'\n";
1434                 }
1435             } else {
1436                 die "invalid security group name '$source'\n";
1437             }
1438         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1439             my $alias = lc($source);
1440             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1441             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1442             die "no such alias '$source'\n" if !$e;
1443             push @cmd, "-s $e->{cidr}";
1444         } elsif ($source =~ m/\-/){
1445             push @cmd, "-m iprange --src-range $source";
1446         } else {
1447             push @cmd, "-s $source";
1448         }
1449     }
1450
1451     if ($dest) {
1452         if ($dest =~ m/^\+/) {
1453             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1454                 my $name = $1;
1455                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1456                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name);
1457                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1458                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1459                     my $ipset_chain = compute_ipset_chain_name(0, $name);
1460                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1461                 } else {
1462                     die "no such ipset '$name'\n";
1463                 }
1464             } else {
1465                 die "invalid security group name '$dest'\n";
1466             }
1467         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1468             my $alias = lc($dest);
1469             my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
1470             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1471             die "no such alias '$dest'\n" if !$e;
1472             push @cmd, "-d $e->{cidr}";
1473         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1474             push @cmd, "-m iprange --dst-range $dest";
1475         } else {
1476             push @cmd, "-d $dest";
1477         }
1478     }
1479
1480     if ($rule->{proto}) {
1481         push @cmd, "-p $rule->{proto}";
1482
1483         my $multiport = 0;
1484         $multiport++ if $nbdport > 1;
1485         $multiport++ if $nbsport > 1;
1486
1487         push @cmd, "--match multiport" if $multiport;
1488
1489         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1490             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1491
1492         if ($rule->{dport}) {
1493             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1494                 # Note: we use dport to store --icmp-type
1495                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1496                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1497             } else {
1498                 if ($nbdport > 1) {
1499                     if ($multiport == 2) {
1500                         push @cmd,  "--ports $rule->{dport}";
1501                     } else {
1502                         push @cmd, "--dports $rule->{dport}";
1503                     }
1504                 } else {
1505                     push @cmd, "--dport $rule->{dport}";
1506                 }
1507             }
1508         }
1509
1510         if ($rule->{sport}) {
1511             if ($nbsport > 1) {
1512                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1513             } else {
1514                 push @cmd, "--sport $rule->{sport}";
1515             }
1516         }
1517     } elsif ($rule->{dport} || $rule->{sport}) {
1518         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1519         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1520     }
1521
1522     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1523
1524     if (my $action = $rule->{action}) {
1525         $action = $actions->{$action} if defined($actions->{$action});
1526         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1527         push @cmd, $goto ? "-g $action" : "-j $action";
1528     }
1529
1530     return scalar(@cmd) ? join(' ', @cmd) : undef;
1531 }
1532
1533 sub ruleset_generate_rule {
1534     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1535
1536     my $rules;
1537
1538     if ($rule->{macro}) {
1539         $rules = &$apply_macro($rule->{macro}, $rule);
1540     } else {
1541         $rules = [ $rule ];
1542     }
1543
1544     # update all or nothing
1545
1546     my @cmds = ();
1547     foreach my $tmp (@$rules) {
1548         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1549             push @cmds, $cmdstr;
1550         }
1551     }
1552
1553     foreach my $cmdstr (@cmds) {
1554         ruleset_addrule($ruleset, $chain, $cmdstr);
1555     }
1556 }
1557
1558 sub ruleset_generate_rule_insert {
1559     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1560
1561     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1562
1563     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1564         ruleset_insertrule($ruleset, $chain, $cmdstr);
1565     }
1566 }
1567
1568 sub ruleset_create_chain {
1569     my ($ruleset, $chain) = @_;
1570
1571     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1572     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1573
1574     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1575
1576     $ruleset->{$chain} = [];
1577 }
1578
1579 sub ruleset_chain_exist {
1580     my ($ruleset, $chain) = @_;
1581
1582     return $ruleset->{$chain} ? 1 : undef;
1583 }
1584
1585 sub ruleset_addrule {
1586    my ($ruleset, $chain, $rule) = @_;
1587
1588    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1589
1590    push @{$ruleset->{$chain}}, "-A $chain $rule";
1591 }
1592
1593 sub ruleset_insertrule {
1594    my ($ruleset, $chain, $rule) = @_;
1595
1596    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1597
1598    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1599 }
1600
1601 sub get_log_rule_base {
1602     my ($chain, $vmid, $msg, $loglevel) = @_;
1603
1604     die "internal error - no log level" if !defined($loglevel);
1605
1606     $vmid = 0 if !defined($vmid);
1607
1608     # Note: we use special format for prefix to pass further
1609     # info to log daemon (VMID, LOGVELEL and CHAIN)
1610
1611     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1612 }
1613
1614 sub ruleset_addlog {
1615     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1616
1617     return if !defined($loglevel);
1618
1619     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1620
1621     $logrule = "$rule $logrule" if defined($rule);
1622
1623     ruleset_addrule($ruleset, $chain, $logrule);
1624 }
1625
1626 sub ruleset_add_chain_policy {
1627     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1628
1629     if ($policy eq 'ACCEPT') {
1630
1631         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1632                               { ACCEPT =>  $accept_action});
1633
1634     } elsif ($policy eq 'DROP') {
1635
1636         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1637
1638         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1639
1640         ruleset_addrule($ruleset, $chain, "-j DROP");
1641     } elsif ($policy eq 'REJECT') {
1642         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1643
1644         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1645
1646         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1647     } else {
1648         # should not happen
1649         die "internal error: unknown policy '$policy'";
1650     }
1651 }
1652
1653 sub ruleset_chain_add_conn_filters {
1654     my ($ruleset, $chain, $accept) = @_;
1655
1656     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1657     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1658 }
1659
1660 sub ruleset_chain_add_input_filters {
1661     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1662
1663     if ($cluster_conf->{ipset}->{blacklist}){
1664         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1665             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1666             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1667             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1668         }
1669         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist');
1670         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1671     }
1672
1673     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1674         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1675     }
1676
1677     if ($options->{tcpflags}) {
1678         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1679     }
1680 }
1681
1682 sub ruleset_create_vm_chain {
1683     my ($ruleset, $chain, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1684
1685     ruleset_create_chain($ruleset, $chain);
1686     my $accept = generate_nfqueue($options);
1687
1688     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1689         if ($direction eq 'OUT') {
1690             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1691                                                       proto => 'udp', sport => 68, dport => 67 });
1692         } else {
1693             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1694                                                       proto => 'udp', sport => 67, dport => 68 });
1695         }
1696     }
1697
1698     if ($direction eq 'OUT') {
1699         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1700             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1701         }
1702         if ($ipfilter_ipset) {
1703             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1704         }
1705         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1706     }
1707 }
1708
1709 sub ruleset_add_group_rule {
1710     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1711
1712     my $group = $rule->{action};
1713     my $group_chain = "GROUP-$group-$direction";
1714     if(!ruleset_chain_exist($ruleset, $group_chain)){
1715         generate_group_rules($ruleset, $cluster_conf, $group);
1716     }
1717
1718     if ($direction eq 'OUT' && $rule->{iface_out}) {
1719         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1720     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1721         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1722     } else {
1723         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1724     }
1725
1726     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1727 }
1728
1729 sub ruleset_generate_vm_rules {
1730     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options) = @_;
1731
1732     my $lc_direction = lc($direction);
1733
1734     my $in_accept = generate_nfqueue($options);
1735
1736     foreach my $rule (@$rules) {
1737         next if $rule->{iface} && $rule->{iface} ne $netid;
1738         next if !$rule->{enable} || $rule->{errors};
1739         if ($rule->{type} eq 'group') {
1740             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1741                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1742         } else {
1743             next if $rule->{type} ne $lc_direction;
1744             eval {
1745                 if ($direction eq 'OUT') {
1746                     ruleset_generate_rule($ruleset, $chain, $rule,
1747                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1748                                           undef, $cluster_conf, $vmfw_conf);
1749                 } else {
1750                     ruleset_generate_rule($ruleset, $chain, $rule,
1751                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1752                                           undef, $cluster_conf, $vmfw_conf);
1753                 }
1754             };
1755             warn $@ if $@;
1756         }
1757     }
1758 }
1759
1760 sub generate_nfqueue {
1761     my ($options) = @_;
1762
1763     if ($options->{ips}) {
1764         my $action = "NFQUEUE";
1765         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1766             if (defined($3) && defined($1)) {
1767                 $action .= " --queue-balance $1:$3";
1768             } elsif (defined($1)) {
1769                 $action .= " --queue-num $1";
1770             }
1771         }
1772         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1773         return $action;
1774     } else {
1775         return "ACCEPT";
1776     }
1777 }
1778
1779 sub ruleset_generate_vm_ipsrules {
1780     my ($ruleset, $options, $direction, $iface) = @_;
1781
1782     if ($options->{ips} && $direction eq 'IN') {
1783         my $nfqueue = generate_nfqueue($options);
1784
1785         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1786             ruleset_create_chain($ruleset, "PVEFW-IPS");
1787         }
1788
1789         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1790     }
1791 }
1792
1793 sub generate_venet_rules_direction {
1794     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1795
1796     my $lc_direction = lc($direction);
1797
1798     my $rules = $vmfw_conf->{rules};
1799
1800     my $options = $vmfw_conf->{options};
1801     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1802
1803     my $chain = "venet0-$vmid-$direction";
1804
1805     ruleset_create_vm_chain($ruleset, $chain, $options, undef, undef, $direction);
1806
1807     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, 'venet', $direction);
1808
1809     # implement policy
1810     my $policy;
1811
1812     if ($direction eq 'OUT') {
1813         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1814     } else {
1815         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1816     }
1817
1818     my $accept = generate_nfqueue($options);
1819     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1820     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1821
1822     if ($direction eq 'OUT') {
1823         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1824             action => $chain,
1825             source => $ip,
1826             iface_in => 'venet0'});
1827     } else {
1828         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1829             action => $chain,
1830             dest => $ip,
1831             iface_out => 'venet0'});
1832     }
1833 }
1834
1835 sub generate_tap_rules_direction {
1836     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1837
1838     my $lc_direction = lc($direction);
1839
1840     my $rules = $vmfw_conf->{rules};
1841
1842     my $options = $vmfw_conf->{options};
1843     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1844
1845     my $tapchain = "$iface-$direction";
1846
1847     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
1848     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name)
1849         if $vmfw_conf->{ipset}->{$ipfilter_name};
1850
1851     # create chain with mac and ip filter
1852     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $ipfilter_ipset, $direction);
1853
1854     if ($options->{enable}) {
1855         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options);
1856
1857         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1858
1859         # implement policy
1860         my $policy;
1861
1862         if ($direction eq 'OUT') {
1863             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1864         } else {
1865         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1866         }
1867
1868         my $accept = generate_nfqueue($options);
1869         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1870         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1871     } else {
1872         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
1873         ruleset_add_chain_policy($ruleset, $tapchain, $vmid, 'ACCEPT', $loglevel, $accept_action);
1874     }
1875
1876     # plug the tap chain to bridge chain
1877     if ($direction eq 'IN') {
1878         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1879                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1880     } else {
1881         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1882                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1883     }
1884 }
1885
1886 sub enable_host_firewall {
1887     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1888
1889     my $options = $hostfw_conf->{options};
1890     my $cluster_options = $cluster_conf->{options};
1891     my $rules = $hostfw_conf->{rules};
1892     my $cluster_rules = $cluster_conf->{rules};
1893
1894     # host inbound firewall
1895     my $chain = "PVEFW-HOST-IN";
1896     ruleset_create_chain($ruleset, $chain);
1897
1898     my $loglevel = get_option_log_level($options, "log_level_in");
1899
1900     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1901
1902     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1903     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1904
1905     # we use RETURN because we need to check also tap rules
1906     my $accept_action = 'RETURN';
1907
1908     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1909
1910     # add host rules first, so that cluster wide rules can be overwritten
1911     foreach my $rule (@$rules, @$cluster_rules) {
1912         next if !$rule->{enable} || $rule->{errors};
1913
1914         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1915
1916         eval {
1917             if ($rule->{type} eq 'group') {
1918                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1919             } elsif ($rule->{type} eq 'in') {
1920                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1921                                       undef, $cluster_conf, $hostfw_conf);
1922             }
1923         };
1924         warn $@ if $@;
1925         delete $rule->{iface_in};
1926     }
1927
1928     # allow standard traffic for management ipset (includes cluster network)
1929     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management");
1930     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
1931     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
1932     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1933     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1934     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
1935
1936     my $localnet = local_network();
1937
1938     # corosync
1939     if ($localnet) {
1940         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1941         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
1942         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
1943     }
1944
1945     # implement input policy
1946     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1947     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1948
1949     # host outbound firewall
1950     $chain = "PVEFW-HOST-OUT";
1951     ruleset_create_chain($ruleset, $chain);
1952
1953     $loglevel = get_option_log_level($options, "log_level_out");
1954
1955     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1956
1957     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1958
1959     # we use RETURN because we may want to check other thigs later
1960     $accept_action = 'RETURN';
1961
1962     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
1963
1964     # add host rules first, so that cluster wide rules can be overwritten
1965     foreach my $rule (@$rules, @$cluster_rules) {
1966         next if !$rule->{enable} || $rule->{errors};
1967
1968         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1969         eval {
1970             if ($rule->{type} eq 'group') {
1971                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1972             } elsif ($rule->{type} eq 'out') {
1973                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1974                                       undef, $cluster_conf, $hostfw_conf);
1975             }
1976         };
1977         warn $@ if $@;
1978         delete $rule->{iface_out};
1979     }
1980
1981     # allow standard traffic on cluster network
1982     if ($localnet) {
1983         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
1984         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
1985         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
1986         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
1987
1988         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
1989         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
1990         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
1991     }
1992
1993     # implement output policy
1994     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1995     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1996
1997     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1998     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1999 }
2000
2001 sub generate_group_rules {
2002     my ($ruleset, $cluster_conf, $group) = @_;
2003
2004     my $rules = $cluster_conf->{groups}->{$group};
2005
2006     if (!$rules) {
2007         warn "no such security group '$group'\n";
2008         $rules = []; # create empty chain
2009     }
2010
2011     my $chain = "GROUP-${group}-IN";
2012
2013     ruleset_create_chain($ruleset, $chain);
2014     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2015
2016     foreach my $rule (@$rules) {
2017         next if $rule->{type} ne 'in';
2018         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2019     }
2020
2021     $chain = "GROUP-${group}-OUT";
2022
2023     ruleset_create_chain($ruleset, $chain);
2024     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2025
2026     foreach my $rule (@$rules) {
2027         next if $rule->{type} ne 'out';
2028         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2029         # check also other tap rules later
2030         ruleset_generate_rule($ruleset, $chain, $rule,
2031                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
2032     }
2033 }
2034
2035 my $MAX_NETS = 32;
2036 my $valid_netdev_names = {};
2037 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2038     $valid_netdev_names->{"net$i"} = 1;
2039 }
2040
2041 sub parse_fw_rule {
2042     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2043
2044     my $orig_line = $line;
2045
2046     my $rule = {};
2047
2048     # we can add single line comments to the end of the rule
2049     if ($line =~ s/#\s*(.*?)\s*$//) {
2050         $rule->{comment} = decode('utf8', $1);
2051     }
2052
2053     # we can disable a rule when prefixed with '|'
2054
2055     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2056
2057     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2058         die "unable to parse rule: $line\n";
2059
2060     $rule->{type} = lc($1);
2061     $rule->{action} = $2;
2062
2063     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2064         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2065             $rule->{macro} = $1;
2066             $rule->{action} = $2;
2067         }
2068     }
2069
2070     while (length($line)) {
2071         if ($line =~ s/^-i (\S+)\s*//) {
2072             $rule->{iface} = $1;
2073             next;
2074         }
2075
2076         last if $rule->{type} eq 'group';
2077
2078         if ($line =~ s/^-p (\S+)\s*//) {
2079             $rule->{proto} = $1;
2080             next;
2081         }
2082
2083         if ($line =~ s/^-dport (\S+)\s*//) {
2084             $rule->{dport} = $1;
2085             next;
2086         }
2087
2088         if ($line =~ s/^-sport (\S+)\s*//) {
2089             $rule->{sport} = $1;
2090             next;
2091         }
2092         if ($line =~ s/^-source (\S+)\s*//) {
2093             $rule->{source} = $1;
2094             next;
2095         }
2096         if ($line =~ s/^-dest (\S+)\s*//) {
2097             $rule->{dest} = $1;
2098             next;
2099         }
2100
2101         last;
2102     }
2103
2104     die "unable to parse rule parameters: $line\n" if length($line);
2105
2106     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2107     if ($verbose && $rule->{errors}) {
2108         warn "$prefix - errors in rule parameters: $orig_line\n";
2109         foreach my $p (keys %{$rule->{errors}}) {
2110             warn "  $p: $rule->{errors}->{$p}\n";
2111         }
2112     }
2113
2114     return $rule;
2115 }
2116
2117 sub parse_vmfw_option {
2118     my ($line) = @_;
2119
2120     my ($opt, $value);
2121
2122     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2123
2124     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
2125         $opt = lc($1);
2126         $value = int($2);
2127     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2128         $opt = lc($1);
2129         $value = $2 ? lc($3) : '';
2130     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2131         $opt = lc($1);
2132         $value = uc($3);
2133     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2134         $opt = lc($1);
2135         $value = $2;
2136     } else {
2137         die "can't parse option '$line'\n"
2138     }
2139
2140     return ($opt, $value);
2141 }
2142
2143 sub parse_hostfw_option {
2144     my ($line) = @_;
2145
2146     my ($opt, $value);
2147
2148     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2149
2150     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
2151         $opt = lc($1);
2152         $value = int($2);
2153     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2154         $opt = lc($1);
2155         $value = $2 ? lc($3) : '';
2156     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2157         $opt = lc($1);
2158         $value = int($2);
2159     } else {
2160         die "can't parse option '$line'\n"
2161     }
2162
2163     return ($opt, $value);
2164 }
2165
2166 sub parse_clusterfw_option {
2167     my ($line) = @_;
2168
2169     my ($opt, $value);
2170
2171     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
2172         $opt = lc($1);
2173         $value = int($2);
2174     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2175         $opt = lc($1);
2176         $value = uc($3);
2177     } else {
2178         die "can't parse option '$line'\n"
2179     }
2180
2181     return ($opt, $value);
2182 }
2183
2184 sub resolve_alias {
2185     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2186
2187     if ($cidr !~ m/^\d/) {
2188         my $alias = lc($cidr);
2189         my $e = $fw_conf->{aliases}->{$alias} if $fw_conf;
2190         $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2191         return $e->{cidr} if $e;
2192
2193         die "no such alias '$cidr'\n";
2194     }
2195
2196     return $cidr;
2197 }
2198
2199 sub parse_alias {
2200     my ($line) = @_;
2201
2202     # we can add single line comments to the end of the line
2203     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2204
2205     if ($line =~ m/^(\S+)\s(\S+)$/) {
2206         my ($name, $cidr) = ($1, $2);
2207         $cidr =~ s|/32$||;
2208         pve_verify_ipv4_or_cidr($cidr);
2209         my $data = {
2210             name => $name,
2211             cidr => $cidr,
2212         };
2213         $data->{comment} = $comment  if $comment;
2214         return $data;
2215     }
2216
2217     return undef;
2218 }
2219
2220 sub generic_fw_config_parser {
2221     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2222
2223     my $section;
2224     my $group;
2225
2226     my $res = $empty_conf;
2227
2228     while (defined(my $line = <$fh>)) {
2229         next if $line =~ m/^#/;
2230         next if $line =~ m/^\s*$/;
2231
2232         chomp $line;
2233
2234         my $linenr = $fh->input_line_number();
2235         my $prefix = "$filename (line $linenr)";
2236
2237         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2238             $section = 'options';
2239             next;
2240         }
2241
2242         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2243             $section = 'aliases';
2244             next;
2245         }
2246
2247         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2248             $section = 'groups';
2249             $group = lc($1);
2250             my $comment = $2;
2251             eval {
2252                 die "security group name too long\n" if length($group) > $max_group_name_length;
2253                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2254             };
2255             if (my $err = $@) {
2256                 ($section, $group, $comment) = undef;
2257                 warn "$prefix: $err";
2258                 next;
2259             }
2260
2261             $res->{$section}->{$group} = [];
2262             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2263                 if $comment;
2264             next;
2265         }
2266
2267         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2268             $section = 'rules';
2269             next;
2270         }
2271
2272         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2273             $section = 'ipset';
2274             $group = lc($1);
2275             my $comment = $2;
2276             eval {
2277                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2278                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2279             };
2280             if (my $err = $@) {
2281                 ($section, $group, $comment) = undef;
2282                 warn "$prefix: $err";
2283                 next;
2284             }
2285
2286             $res->{$section}->{$group} = [];
2287             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2288                 if $comment;
2289             next;
2290         }
2291
2292         if (!$section) {
2293             warn "$prefix: skip line - no section\n";
2294             next;
2295         }
2296
2297         if ($section eq 'options') {
2298             eval {
2299                 my ($opt, $value);
2300                 if ($rule_env eq 'cluster') {
2301                     ($opt, $value) = parse_clusterfw_option($line);
2302                 } elsif ($rule_env eq 'host') {
2303                     ($opt, $value) = parse_hostfw_option($line);
2304                 } else {
2305                     ($opt, $value) = parse_vmfw_option($line);
2306                 }
2307                 $res->{options}->{$opt} = $value;
2308             };
2309             warn "$prefix: $@" if $@;
2310         } elsif ($section eq 'aliases') {
2311             eval {
2312                 my $data = parse_alias($line);
2313                 $res->{aliases}->{lc($data->{name})} = $data;
2314             };
2315             warn "$prefix: $@" if $@;
2316         } elsif ($section eq 'rules') {
2317             my $rule;
2318             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2319             if (my $err = $@) {
2320                 warn "$prefix: $err";
2321                 next;
2322             }
2323             push @{$res->{$section}}, $rule;
2324         } elsif ($section eq 'groups') {
2325             my $rule;
2326             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2327             if (my $err = $@) {
2328                 warn "$prefix: $err";
2329                 next;
2330             }
2331             push @{$res->{$section}->{$group}}, $rule;
2332         } elsif ($section eq 'ipset') {
2333             # we can add single line comments to the end of the rule
2334             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2335
2336             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2337             my $nomatch = $1;
2338             my $cidr = $2;
2339             my $errors;
2340
2341             if ($nomatch && !$feature_ipset_nomatch) {
2342                 $errors->{nomatch} = "nomatch not supported by kernel";
2343             }
2344
2345             eval {
2346                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2347                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2348                 } else {
2349                     $cidr =~ s|/32$||;
2350                     pve_verify_ipv4_or_cidr_or_alias($cidr);
2351                 }
2352             };
2353             if (my $err = $@) {
2354                 chomp $err;
2355                 $errors->{cidr} = $err;
2356             }
2357
2358             my $entry = { cidr => $cidr };
2359             $entry->{nomatch} = 1 if $nomatch;
2360             $entry->{comment} = $comment if $comment;
2361             $entry->{errors} =  $errors if $errors;
2362
2363             if ($verbose && $errors) {
2364                 warn "$prefix - errors in ipset '$group': $line\n";
2365                 foreach my $p (keys %{$errors}) {
2366                     warn "  $p: $errors->{$p}\n";
2367                 }
2368             }
2369
2370             push @{$res->{$section}->{$group}}, $entry;
2371         } else {
2372             warn "$prefix: skip line - unknown section\n";
2373             next;
2374         }
2375     }
2376
2377     return $res;
2378 }
2379
2380 sub parse_hostfw_config {
2381     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2382
2383     my $empty_conf = { rules => [], options => {}};
2384
2385     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2386 }
2387
2388 sub parse_vmfw_config {
2389     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2390
2391     my $empty_conf = {
2392         rules => [],
2393         options => {},
2394         aliases => {},
2395         ipset => {} ,
2396         ipset_comments => {},
2397     };
2398
2399     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2400 }
2401
2402 sub parse_clusterfw_config {
2403     my ($filename, $fh, $verbose) = @_;
2404
2405     my $section;
2406     my $group;
2407
2408     my $empty_conf = {
2409         rules => [],
2410         options => {},
2411         aliases => {},
2412         groups => {},
2413         group_comments => {},
2414         ipset => {} ,
2415         ipset_comments => {},
2416     };
2417
2418     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2419 }
2420
2421 sub run_locked {
2422     my ($code, @param) = @_;
2423
2424     my $timeout = 10;
2425
2426     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2427
2428     die $@ if $@;
2429
2430     return $res;
2431 }
2432
2433 sub read_local_vm_config {
2434
2435     my $openvz = {};
2436     my $qemu = {};
2437
2438     my $vmdata = { openvz => $openvz, qemu => $qemu };
2439
2440     my $vmlist = PVE::Cluster::get_vmlist();
2441     return $vmdata if !$vmlist || !$vmlist->{ids};
2442     my $ids = $vmlist->{ids};
2443
2444     foreach my $vmid (keys %$ids) {
2445         next if !$vmid; # skip VE0
2446         my $d = $ids->{$vmid};
2447         next if !$d->{node} || $d->{node} ne $nodename;
2448         next if !$d->{type};
2449         if ($d->{type} eq 'openvz') {
2450             if ($have_pve_manager) {
2451                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2452                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2453                     $openvz->{$vmid} = $conf;
2454                 }
2455             }
2456         } elsif ($d->{type} eq 'qemu') {
2457             if ($have_qemu_server) {
2458                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2459                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2460                     $qemu->{$vmid} = $conf;
2461                 }
2462             }
2463         }
2464     }
2465
2466     return $vmdata;
2467 };
2468
2469 sub load_vmfw_conf {
2470     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2471
2472     my $vmfw_conf = {};
2473
2474     $dir = $pvefw_conf_dir if !defined($dir);
2475
2476     my $filename = "$dir/$vmid.fw";
2477     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2478         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2479         $vmfw_conf->{vmid} = $vmid;
2480     }
2481
2482     return $vmfw_conf;
2483 }
2484
2485 my $format_rules = sub {
2486     my ($rules, $allow_iface) = @_;
2487
2488     my $raw = '';
2489
2490     foreach my $rule (@$rules) {
2491         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2492             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2493             $raw .= uc($rule->{type});
2494             if ($rule->{macro}) {
2495                 $raw .= " $rule->{macro}($rule->{action})";
2496             } else {
2497                 $raw .= " " . $rule->{action};
2498             }
2499             if ($allow_iface && $rule->{iface}) {
2500                 $raw .= " -i $rule->{iface}";
2501             }
2502
2503             if ($rule->{type} ne  'group')  {
2504                 $raw .= " -source $rule->{source}" if $rule->{source};
2505                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2506                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2507                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2508                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2509             }
2510
2511             $raw .= " # " . encode('utf8', $rule->{comment})
2512                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2513             $raw .= "\n";
2514         } else {
2515             die "unknown rule type '$rule->{type}'";
2516         }
2517     }
2518
2519     return $raw;
2520 };
2521
2522 my $format_options = sub {
2523     my ($options) = @_;
2524
2525     my $raw = '';
2526
2527     $raw .= "[OPTIONS]\n\n";
2528     foreach my $opt (keys %$options) {
2529         $raw .= "$opt: $options->{$opt}\n";
2530     }
2531     $raw .= "\n";
2532
2533     return $raw;
2534 };
2535
2536 my $format_aliases = sub {
2537     my ($aliases) = @_;
2538
2539     my $raw = '';
2540
2541     $raw .= "[ALIASES]\n\n";
2542     foreach my $k (keys %$aliases) {
2543         my $e = $aliases->{$k};
2544         $raw .= "$e->{name} $e->{cidr}";
2545         $raw .= " # " . encode('utf8', $e->{comment})
2546             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2547         $raw .= "\n";
2548     }
2549     $raw .= "\n";
2550
2551     return $raw;
2552 };
2553
2554 my $format_ipsets = sub {
2555     my ($fw_conf) = @_;
2556
2557     my $raw = '';
2558
2559     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2560         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2561             my $utf8comment = encode('utf8', $comment);
2562             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2563         } else {
2564             $raw .= "[IPSET $ipset]\n\n";
2565         }
2566         my $options = $fw_conf->{ipset}->{$ipset};
2567
2568         my $nethash = {};
2569         foreach my $entry (@$options) {
2570             $nethash->{$entry->{cidr}} = $entry;
2571         }
2572
2573         foreach my $cidr (sort keys %$nethash) {
2574             my $entry = $nethash->{$cidr};
2575             my $line = $entry->{nomatch} ? '!' : '';
2576             $line .= $entry->{cidr};
2577             $line .= " # " . encode('utf8', $entry->{comment})
2578                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2579             $raw .= "$line\n";
2580         }
2581
2582         $raw .= "\n";
2583     }
2584
2585     return $raw;
2586 };
2587
2588 sub save_vmfw_conf {
2589     my ($vmid, $vmfw_conf) = @_;
2590
2591     my $raw = '';
2592
2593     my $options = $vmfw_conf->{options};
2594     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2595
2596     my $aliases = $vmfw_conf->{aliases};
2597     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2598
2599     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2600
2601     my $rules = $vmfw_conf->{rules} || [];
2602     if ($rules && scalar(@$rules)) {
2603         $raw .= "[RULES]\n\n";
2604         $raw .= &$format_rules($rules, 1);
2605         $raw .= "\n";
2606     }
2607
2608     mkdir $pvefw_conf_dir;
2609
2610     my $filename = "$pvefw_conf_dir/$vmid.fw";
2611     PVE::Tools::file_set_contents($filename, $raw);
2612 }
2613
2614 sub read_vm_firewall_configs {
2615     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2616
2617     my $vmfw_configs = {};
2618
2619     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2620         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2621         next if !$vmfw_conf->{options}; # skip if file does not exists
2622         $vmfw_configs->{$vmid} = $vmfw_conf;
2623     }
2624     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2625         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2626         next if !$vmfw_conf->{options}; # skip if file does not exists
2627         $vmfw_configs->{$vmid} = $vmfw_conf;
2628     }
2629
2630     return $vmfw_configs;
2631 }
2632
2633 sub get_option_log_level {
2634     my ($options, $k) = @_;
2635
2636     my $v = $options->{$k};
2637     $v = $default_log_level if !defined($v);
2638
2639     return undef if $v eq '' || $v eq 'nolog';
2640
2641     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2642
2643     return $v if ($v >= 0) && ($v <= 7);
2644
2645     warn "unknown log level ($k = '$v')\n";
2646
2647     return undef;
2648 }
2649
2650 sub generate_std_chains {
2651     my ($ruleset, $options, $ipversion) = @_;
2652
2653     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2654
2655     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2656
2657     my $chain;
2658
2659     if ($ipversion == 4) {
2660         # same as shorewall smurflog.
2661         $chain = 'PVEFW-smurflog';
2662         $std_chains->{$chain} = [];
2663
2664         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2665         push @{$std_chains->{$chain}}, "-j DROP";
2666     }
2667
2668     # same as shorewall logflags action.
2669     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2670     $chain = 'PVEFW-logflags';
2671     $std_chains->{$chain} = [];
2672
2673     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2674     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2675     push @{$std_chains->{$chain}}, "-j DROP";
2676
2677     foreach my $chain (keys %$std_chains) {
2678         ruleset_create_chain($ruleset, $chain);
2679         foreach my $rule (@{$std_chains->{$chain}}) {
2680             if (ref($rule)) {
2681                 ruleset_generate_rule($ruleset, $chain, $rule);
2682             } else {
2683                 ruleset_addrule($ruleset, $chain, $rule);
2684             }
2685         }
2686     }
2687 }
2688
2689 sub generate_ipset_chains {
2690     my ($ipset_ruleset, $clusterfw_conf, $fw_conf) = @_;
2691
2692     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2693         my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $ipset);
2694         generate_ipset($ipset_ruleset, $ipset_chain, $fw_conf->{ipset}->{$ipset}, $clusterfw_conf, $fw_conf);
2695     }
2696 }
2697
2698 sub generate_ipset {
2699     my ($ipset_ruleset, $name, $options, $clusterfw_conf, $fw_conf) = @_;
2700
2701     die "duplicate ipset chain '$name'\n" if defined($ipset_ruleset->{$name});
2702
2703     my $hashsize = scalar(@$options);
2704     if ($hashsize <= 64) {
2705         $hashsize = 64;
2706     } else {
2707         $hashsize = round_powerof2($hashsize);
2708     }
2709
2710     $ipset_ruleset->{$name} = ["create $name hash:net family inet hashsize $hashsize maxelem $hashsize"];
2711
2712     # remove duplicates
2713     my $nethash = {};
2714     foreach my $entry (@$options) {
2715         next if $entry->{errors}; # skip entries with errors
2716         eval {
2717             my $cidr = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
2718             $nethash->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
2719         };
2720         warn $@ if $@;
2721     }
2722
2723     foreach my $cidr (sort keys %$nethash) {
2724         my $entry = $nethash->{$cidr};
2725
2726         my $cmd = "add $name $cidr";
2727         if ($entry->{nomatch}) {
2728             if ($feature_ipset_nomatch) {
2729                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2730             } else {
2731                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2732             }
2733         } else {
2734             push @{$ipset_ruleset->{$name}}, $cmd;
2735         }
2736     }
2737 }
2738
2739 sub round_powerof2 {
2740     my ($int) = @_;
2741
2742     $int--;
2743     $int |= $int >> $_ foreach (1,2,4,8,16);
2744     return ++$int;
2745 }
2746
2747 sub load_clusterfw_conf {
2748     my ($filename, $verbose) = @_;
2749
2750     $filename = $clusterfw_conf_filename if !defined($filename);
2751
2752     my $cluster_conf = {};
2753     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2754         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
2755     }
2756
2757     return $cluster_conf;
2758 }
2759
2760 sub save_clusterfw_conf {
2761     my ($cluster_conf) = @_;
2762
2763     my $raw = '';
2764
2765     my $options = $cluster_conf->{options};
2766     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2767
2768     my $aliases = $cluster_conf->{aliases};
2769     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2770
2771     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
2772
2773     my $rules = $cluster_conf->{rules};
2774     if ($rules && scalar(@$rules)) {
2775         $raw .= "[RULES]\n\n";
2776         $raw .= &$format_rules($rules, 1);
2777         $raw .= "\n";
2778     }
2779
2780     if ($cluster_conf->{groups}) {
2781         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2782             my $rules = $cluster_conf->{groups}->{$group};
2783             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2784                 my $utf8comment = encode('utf8', $comment);
2785                 $raw .= "[group $group] # $utf8comment\n\n";
2786             } else {
2787                 $raw .= "[group $group]\n\n";
2788             }
2789
2790             $raw .= &$format_rules($rules, 0);
2791             $raw .= "\n";
2792         }
2793     }
2794
2795     mkdir $pvefw_conf_dir;
2796     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2797 }
2798
2799 sub load_hostfw_conf {
2800     my ($cluster_conf, $filename, $verbose) = @_;
2801
2802     $filename = $hostfw_conf_filename if !defined($filename);
2803
2804     my $hostfw_conf = {};
2805     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2806         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
2807     }
2808     return $hostfw_conf;
2809 }
2810
2811 sub save_hostfw_conf {
2812     my ($hostfw_conf) = @_;
2813
2814     my $raw = '';
2815
2816     my $options = $hostfw_conf->{options};
2817     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2818
2819     my $rules = $hostfw_conf->{rules};
2820     if ($rules && scalar(@$rules)) {
2821         $raw .= "[RULES]\n\n";
2822         $raw .= &$format_rules($rules, 1);
2823         $raw .= "\n";
2824     }
2825
2826     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2827 }
2828
2829 sub compile {
2830     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
2831
2832     my $vmfw_configs;
2833
2834     if ($vmdata) { # test mode
2835         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2836         my $filename = "$testdir/cluster.fw";
2837         $cluster_conf = load_clusterfw_conf($filename, $verbose);
2838
2839         $filename = "$testdir/host.fw";
2840         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
2841
2842         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
2843     } else { # normal operation
2844         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
2845
2846         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
2847
2848         $vmdata = read_local_vm_config();
2849         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
2850     }
2851
2852     my ($ruleset, $ipset_ruleset) = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
2853     return ($ruleset, $ipset_ruleset);
2854 }
2855
2856 sub compile_iptables_filter {
2857     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
2858
2859     $cluster_conf->{ipset}->{venet0} = [];
2860     my $venet0_ipset_chain = compute_ipset_chain_name(0, 'venet0');
2861
2862     my $localnet;
2863     if ($cluster_conf->{aliases}->{local_network}) {
2864         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2865     } else {
2866         $localnet = local_network() || '127.0.0.0/8';
2867         $cluster_conf->{aliases}->{local_network} = { cidr => $localnet };
2868     }
2869
2870     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
2871
2872     return ({}, {}) if !$cluster_conf->{options}->{enable};
2873
2874     my $ruleset = {};
2875
2876     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2877     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2878
2879     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2880
2881     my $hostfw_options = $hostfw_conf->{options} || {};
2882
2883     # fixme: what log level should we use here?
2884     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2885
2886     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2887
2888
2889     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2890     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2891     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set ${venet0_ipset_chain} src -j PVEFW-VENET-OUT");
2892
2893     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2894     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2895
2896     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2897
2898     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2899     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2900
2901     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2902     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2903
2904     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2905
2906     generate_std_chains($ruleset, $hostfw_options, $ipversion);
2907
2908     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2909
2910     my $ipset_ruleset = {};
2911
2912     if ($hostfw_enable) {
2913         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf); };
2914         warn $@ if $@; # just to be sure - should not happen
2915     }
2916
2917     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set ${venet0_ipset_chain} dst -j PVEFW-VENET-IN");
2918
2919     # generate firewall rules for QEMU VMs
2920     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2921         eval {
2922             my $conf = $vmdata->{qemu}->{$vmid};
2923             my $vmfw_conf = $vmfw_configs->{$vmid};
2924             return if !$vmfw_conf;
2925
2926             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2927
2928             foreach my $netid (keys %$conf) {
2929                 next if $netid !~ m/^net(\d+)$/;
2930                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
2931                 next if !$net->{firewall};
2932                 my $iface = "tap${vmid}i$1";
2933
2934                 my $macaddr = $net->{macaddr};
2935                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2936                                              $vmfw_conf, $vmid, 'IN');
2937                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2938                                              $vmfw_conf, $vmid, 'OUT');
2939             }
2940         };
2941         warn $@ if $@; # just to be sure - should not happen
2942     }
2943
2944     # generate firewall rules for OpenVZ containers
2945     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2946         eval {
2947             my $conf = $vmdata->{openvz}->{$vmid};
2948
2949             my $vmfw_conf = $vmfw_configs->{$vmid};
2950             return if !$vmfw_conf;
2951
2952             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf);
2953
2954             if ($vmfw_conf->{options}->{enable}) {
2955                 if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2956                     my $ip = $conf->{ip_address}->{value};
2957                     $ip =~ s/\s+/,/g;
2958                     parse_address_list($ip); # make sure we have a valid $ip list
2959
2960                     my @ips = split(',', $ip);
2961
2962                     foreach my $singleip (@ips) {
2963                         my $venet0ipset = {};
2964                         $venet0ipset->{cidr} = $singleip;
2965                         push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2966                     }
2967
2968                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2969                     generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2970                 }
2971             }
2972
2973             if ($conf->{netif} && $conf->{netif}->{value}) {
2974                 my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2975                 foreach my $netid (keys %$netif) {
2976                     my $d = $netif->{$netid};
2977                     my $bridge = $d->{bridge};
2978                     next if !$bridge || $bridge !~ m/^vmbr\d+(v(\d+))?f$/; # firewall enabled ?
2979                     my $macaddr = $d->{mac};
2980                     my $iface = $d->{host_ifname};
2981                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2982                                                  $vmfw_conf, $vmid, 'IN');
2983                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2984                                                  $vmfw_conf, $vmid, 'OUT');
2985                 }
2986             }
2987         };
2988         warn $@ if $@; # just to be sure - should not happen
2989     }
2990
2991     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2992         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2993     }
2994
2995     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf);
2996
2997     return ($ruleset, $ipset_ruleset);
2998 }
2999
3000 sub get_ruleset_status {
3001     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3002
3003     my $statushash = {};
3004
3005     foreach my $chain (sort keys %$ruleset) {
3006         my $sig = &$digest_fn($ruleset->{$chain});
3007
3008         $statushash->{$chain}->{sig} = $sig;
3009
3010         my $oldsig = $active_chains->{$chain};
3011         if (!defined($oldsig)) {
3012             $statushash->{$chain}->{action} = 'create';
3013         } else {
3014             if ($oldsig eq $sig) {
3015                 $statushash->{$chain}->{action} = 'exists';
3016             } else {
3017                 $statushash->{$chain}->{action} = 'update';
3018             }
3019         }
3020         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3021         foreach my $cmd (@{$ruleset->{$chain}}) {
3022             print "\t$cmd\n" if $verbose;
3023         }
3024     }
3025
3026     foreach my $chain (sort keys %$active_chains) {
3027         if (!defined($ruleset->{$chain})) {
3028             my $sig = $active_chains->{$chain};
3029             $statushash->{$chain}->{action} = 'delete';
3030             $statushash->{$chain}->{sig} = $sig;
3031             print "delete $chain ($sig)\n" if $verbose;
3032         }
3033     }
3034
3035     return $statushash;
3036 }
3037
3038 sub print_sig_rule {
3039     my ($chain, $sig) = @_;
3040
3041     # We just use this to store a SHA1 checksum used to detect changes
3042     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3043 }
3044
3045 sub get_ruleset_cmdlist {
3046     my ($ruleset, $verbose) = @_;
3047
3048     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3049
3050     my ($active_chains, $hooks) = iptables_get_chains();
3051     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3052
3053     # create missing chains first
3054     foreach my $chain (sort keys %$ruleset) {
3055         my $stat = $statushash->{$chain};
3056         die "internal error" if !$stat;
3057         next if $stat->{action} ne 'create';
3058
3059         $cmdlist .= ":$chain - [0:0]\n";
3060     }
3061
3062     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3063         my $chain = "PVEFW-$h";
3064         if ($ruleset->{$chain} && !$hooks->{$h}) {
3065             $cmdlist .= "-A $h -j $chain\n";
3066         }
3067     }
3068
3069     foreach my $chain (sort keys %$ruleset) {
3070         my $stat = $statushash->{$chain};
3071         die "internal error" if !$stat;
3072
3073         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3074             $cmdlist .= "-F $chain\n";
3075             foreach my $cmd (@{$ruleset->{$chain}}) {
3076                 $cmdlist .= "$cmd\n";
3077             }
3078             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3079         } elsif ($stat->{action} eq 'delete') {
3080             die "internal error"; # this should not happen
3081         } elsif ($stat->{action} eq 'exists') {
3082             # do nothing
3083         } else {
3084             die "internal error - unknown status '$stat->{action}'";
3085         }
3086     }
3087
3088     foreach my $chain (keys %$statushash) {
3089         next if $statushash->{$chain}->{action} ne 'delete';
3090         $cmdlist .= "-F $chain\n";
3091     }
3092     foreach my $chain (keys %$statushash) {
3093         next if $statushash->{$chain}->{action} ne 'delete';
3094         next if $chain eq 'PVEFW-INPUT';
3095         next if $chain eq 'PVEFW-OUTPUT';
3096         next if $chain eq 'PVEFW-FORWARD';
3097         $cmdlist .= "-X $chain\n";
3098     }
3099
3100     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3101
3102     $cmdlist .= "COMMIT\n";
3103
3104     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3105 }
3106
3107 sub get_ipset_cmdlist {
3108     my ($ruleset, $verbose) = @_;
3109
3110     my $cmdlist = "";
3111
3112     my $delete_cmdlist = "";
3113
3114     my $active_chains = ipset_get_chains();
3115     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3116
3117     # remove stale _swap chains
3118     foreach my $chain (keys %$active_chains) {
3119         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3120             $cmdlist .= "destroy $chain\n";
3121         }
3122     }
3123
3124     foreach my $chain (sort keys %$ruleset) {
3125         my $stat = $statushash->{$chain};
3126         die "internal error" if !$stat;
3127
3128         if ($stat->{action} eq 'create') {
3129             foreach my $cmd (@{$ruleset->{$chain}}) {
3130                 $cmdlist .= "$cmd\n";
3131             }
3132         }
3133
3134         if ($stat->{action} eq 'update') {
3135             my $chain_swap = $chain."_swap";
3136
3137             foreach my $cmd (@{$ruleset->{$chain}}) {
3138                 $cmd =~ s/$chain/$chain_swap/;
3139                 $cmdlist .= "$cmd\n";
3140             }
3141             $cmdlist .= "swap $chain_swap $chain\n";
3142             $cmdlist .= "flush $chain_swap\n";
3143             $cmdlist .= "destroy $chain_swap\n";
3144         }
3145
3146     }
3147
3148     foreach my $chain (keys %$statushash) {
3149         next if $statushash->{$chain}->{action} ne 'delete';
3150
3151         $delete_cmdlist .= "flush $chain\n";
3152         $delete_cmdlist .= "destroy $chain\n";
3153     }
3154
3155     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3156
3157     return ($cmdlist, $delete_cmdlist, $changes);
3158 }
3159
3160 sub apply_ruleset {
3161     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
3162
3163     enable_bridge_firewall();
3164
3165     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3166         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
3167
3168     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3169
3170     if ($verbose) {
3171         if ($ipset_changes) {
3172             print "ipset changes:\n";
3173             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3174             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3175         }
3176
3177         if ($changes) {
3178             print "iptables changes:\n";
3179             print $cmdlist;
3180         }
3181     }
3182
3183     ipset_restore_cmdlist($ipset_create_cmdlist);
3184
3185     iptables_restore_cmdlist($cmdlist);
3186
3187     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3188
3189     # test: re-read status and check if everything is up to date
3190     my $active_chains = iptables_get_chains();
3191     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3192
3193     my $errors;
3194     foreach my $chain (sort keys %$ruleset) {
3195         my $stat = $statushash->{$chain};
3196         if ($stat->{action} ne 'exists') {
3197             warn "unable to update chain '$chain'\n";
3198             $errors = 1;
3199         }
3200     }
3201
3202     die "unable to apply firewall changes\n" if $errors;
3203
3204     update_nf_conntrack_max($hostfw_conf);
3205
3206     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3207
3208 }
3209
3210 sub update_nf_conntrack_max {
3211     my ($hostfw_conf) = @_;
3212
3213     my $max = 65536; # reasonable default
3214
3215     my $options = $hostfw_conf->{options} || {};
3216
3217     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3218         $max = $options->{nf_conntrack_max};
3219         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3220     }
3221
3222     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3223     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3224
3225     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3226
3227     if ($current != $max) {
3228         my $hashsize = int($max/4);
3229         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3230         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3231     }
3232 }
3233
3234 sub update_nf_conntrack_tcp_timeout_established {
3235     my ($hostfw_conf) = @_;
3236
3237     my $options = $hostfw_conf->{options} || {};
3238
3239     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3240
3241     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3242 }
3243
3244 sub remove_pvefw_chains {
3245
3246     my ($chash, $hooks) = iptables_get_chains();
3247     my $cmdlist = "*filter\n";
3248
3249     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3250         if ($hooks->{$h}) {
3251             $cmdlist .= "-D $h -j PVEFW-$h\n";
3252         }
3253     }
3254
3255     foreach my $chain (keys %$chash) {
3256         $cmdlist .= "-F $chain\n";
3257     }
3258
3259     foreach my $chain (keys %$chash) {
3260         $cmdlist .= "-X $chain\n";
3261     }
3262     $cmdlist .= "COMMIT\n";
3263
3264     iptables_restore_cmdlist($cmdlist);
3265
3266     my $ipset_chains = ipset_get_chains();
3267
3268     $cmdlist = "";
3269
3270     foreach my $chain (keys %$ipset_chains) {
3271        $cmdlist .= "flush $chain\n";
3272        $cmdlist .= "destroy $chain\n";
3273     }
3274
3275     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3276 }
3277
3278 sub init {
3279     my $cluster_conf = load_clusterfw_conf();
3280     my $cluster_options = $cluster_conf->{options};
3281     my $enable = $cluster_options->{enable};
3282
3283     return if !$enable;
3284
3285     # load required modules here
3286 }
3287
3288 sub update {
3289     my $code = sub {
3290
3291         my $cluster_conf = load_clusterfw_conf();
3292         my $cluster_options = $cluster_conf->{options};
3293
3294         if (!$cluster_options->{enable}) {
3295             PVE::Firewall::remove_pvefw_chains();
3296             return;
3297         }
3298
3299         my $hostfw_conf = load_hostfw_conf();
3300
3301         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
3302
3303         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset);
3304     };
3305
3306     run_locked($code);
3307 }
3308
3309 1;