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 Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use PVE::Network;
  16 use PVE::SafeSyslog;
  17 use File::Basename;
  18 use File::Path;
  19 use IO::File;
  20 use Net::IP;
  21 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  22 use Encode;
  23
  24 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  25 my $pvefw_conf_dir = "/etc/pve/firewall";
  26 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  27
  28 # dynamically include PVE::QemuServer and PVE::LXC
  29 # to avoid dependency problems
  30 my $have_qemu_server;
  31 eval {
  32     require PVE::QemuServer;
  33     require PVE::QemuConfig;
  34     $have_qemu_server = 1;
  35 };
  36
  37 my $have_lxc;
  38 eval {
  39     require PVE::LXC;
  40     $have_lxc = 1;
  41 };
  42
  43
  44 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  45
  46 mkdir $pve_fw_status_dir; # make sure this exists
  47
  48 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51
  52 my $max_alias_name_length = 64;
  53 my $max_ipset_name_length = 64;
  54 my $max_group_name_length = 18;
  55
  56 my $PROTOCOLS_WITH_PORTS = {
  57     udp => 1,     17 => 1,
  58     udplite => 1, 136 => 1,
  59     tcp => 1,     6 => 1,
  60     dccp => 1,    33 => 1,
  61     sctp => 1,    132 => 1,
  62 };
  63
  64 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  65 sub pve_verify_ip_or_cidr {
  66     my ($cidr, $noerr) = @_;
  67
  68     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  69         return $cidr if Net::IP->new($cidr);
  70         return undef if $noerr;
  71         die Net::IP::Error() . "\n";
  72     }
  73     return undef if $noerr;
  74     die "value does not look like a valid IP address or CIDR network\n";
  75 }
  76
  77 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  78 sub pve_verify_ip_or_cidr_or_alias {
  79     my ($cidr, $noerr) = @_;
  80
  81     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  82
  83     return pve_verify_ip_or_cidr($cidr, $noerr);
  84 }
  85
  86 PVE::JSONSchema::register_standard_option('ipset-name', {
  87     description => "IP set name.",
  88     type => 'string',
  89     pattern => $ipset_name_pattern,
  90     minLength => 2,
  91     maxLength => $max_ipset_name_length,
  92 });
  93
  94 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  95     description => "Alias name.",
  96     type => 'string',
  97     pattern => $ip_alias_pattern,
  98     minLength => 2,
  99     maxLength => $max_alias_name_length,
 100 });
 101
 102 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 103     description => "Log level.",
 104     type => 'string',
 105     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 106     optional => 1,
 107 });
 108
 109 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 110     description => "Security Group name.",
 111     type => 'string',
 112     pattern => $security_group_name_pattern,
 113     minLength => 2,
 114     maxLength => $max_group_name_length,
 115 });
 116
 117 my $feature_ipset_nomatch = 0;
 118 eval  {
 119     my (undef, undef, $release) = POSIX::uname();
 120     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 121         my ($major, $minor) = ($1, $2);
 122         $feature_ipset_nomatch = 1 if ($major > 3) ||
 123             ($major == 3 && $minor >= 7);
 124     }
 125
 126 };
 127
 128 my $nodename = PVE::INotify::nodename();
 129
 130 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 131
 132 my $default_log_level = 'nolog'; # avoid logs by default
 133
 134 my $log_level_hash = {
 135     debug => 7,
 136     info => 6,
 137     notice => 5,
 138     warning => 4,
 139     err => 3,
 140     crit => 2,
 141     alert => 1,
 142     emerg => 0,
 143 };
 144
 145 # we need to overwrite some macros for ipv6
 146 my $pve_ipv6fw_macros = {
 147     'Ping' => [
 148         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 149     ],
 150     'NeighborDiscovery' => [
 151         "IPv6 neighbor solicitation, neighbor and router advertisement",
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 153         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 154         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 155         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 156     ],
 157     'DHCPv6' => [
 158         "DHCPv6 traffic",
 159         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 160     ],
 161     'Trcrt' => [
 162         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 163         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 164     ],
 165  };
 166
 167 # imported/converted from: /usr/share/shorewall/macro.*
 168 my $pve_fw_macros = {
 169     'Amanda' => [
 170         "Amanda Backup",
 171         { action => 'PARAM', proto => 'udp', dport => '10080' },
 172         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 173     ],
 174     'Auth' => [
 175         "Auth (identd) traffic",
 176         { action => 'PARAM', proto => 'tcp', dport => '113' },
 177     ],
 178     'BGP' => [
 179         "Border Gateway Protocol traffic",
 180         { action => 'PARAM', proto => 'tcp', dport => '179' },
 181     ],
 182     'BitTorrent' => [
 183         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 184         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 185         { action => 'PARAM', proto => 'udp', dport => '6881' },
 186     ],
 187     'BitTorrent32' => [
 188         "BitTorrent traffic for BitTorrent 3.2 and later",
 189         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 190         { action => 'PARAM', proto => 'udp', dport => '6881' },
 191     ],
 192     'Ceph' => [
 193         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 194         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 195         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 196     ],
 197     'CVS' => [
 198         "Concurrent Versions System pserver traffic",
 199         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 200     ],
 201     'Citrix' => [
 202         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 203         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 204         { action => 'PARAM', proto => 'udp', dport => '1604' },
 205         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 206     ],
 207     'DAAP' => [
 208         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 209         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 210         { action => 'PARAM', proto => 'udp', dport => '3689' },
 211     ],
 212     'DCC' => [
 213         "Distributed Checksum Clearinghouse spam filtering mechanism",
 214         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 215     ],
 216     'DHCPfwd' => [
 217         "Forwarded DHCP traffic",
 218         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 219     ],
 220     'DNS' => [
 221         "Domain Name System traffic (upd and tcp)",
 222         { action => 'PARAM', proto => 'udp', dport => '53' },
 223         { action => 'PARAM', proto => 'tcp', dport => '53' },
 224     ],
 225     'Distcc' => [
 226         "Distributed Compiler service",
 227         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 228     ],
 229     'FTP' => [
 230         "File Transfer Protocol",
 231         { action => 'PARAM', proto => 'tcp', dport => '21' },
 232     ],
 233     'Finger' => [
 234         "Finger protocol (RFC 742)",
 235         { action => 'PARAM', proto => 'tcp', dport => '79' },
 236     ],
 237     'GNUnet' => [
 238         "GNUnet secure peer-to-peer networking traffic",
 239         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 240         { action => 'PARAM', proto => 'udp', dport => '2086' },
 241         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 242         { action => 'PARAM', proto => 'udp', dport => '1080' },
 243     ],
 244     'GRE' => [
 245         "Generic Routing Encapsulation tunneling protocol",
 246         { action => 'PARAM', proto => '47' },
 247     ],
 248     'Git' => [
 249         "Git distributed revision control traffic",
 250         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 251     ],
 252     'HKP' => [
 253         "OpenPGP HTTP keyserver protocol traffic",
 254         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 255     ],
 256     'HTTP' => [
 257         "Hypertext Transfer Protocol (WWW)",
 258         { action => 'PARAM', proto => 'tcp', dport => '80' },
 259     ],
 260     'HTTPS' => [
 261         "Hypertext Transfer Protocol (WWW) over SSL",
 262         { action => 'PARAM', proto => 'tcp', dport => '443' },
 263     ],
 264     'ICPV2' => [
 265         "Internet Cache Protocol V2 (Squid) traffic",
 266         { action => 'PARAM', proto => 'udp', dport => '3130' },
 267     ],
 268     'ICQ' => [
 269         "AOL Instant Messenger traffic",
 270         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 271     ],
 272     'IMAP' => [
 273         "Internet Message Access Protocol",
 274         { action => 'PARAM', proto => 'tcp', dport => '143' },
 275     ],
 276     'IMAPS' => [
 277         "Internet Message Access Protocol over SSL",
 278         { action => 'PARAM', proto => 'tcp', dport => '993' },
 279     ],
 280     'IPIP' => [
 281         "IPIP capsulation traffic",
 282         { action => 'PARAM', proto => '94' },
 283     ],
 284     'IPsec' => [
 285         "IPsec traffic",
 286         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 287         { action => 'PARAM', proto => '50' },
 288     ],
 289     'IPsecah' => [
 290         "IPsec authentication (AH) traffic",
 291         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 292         { action => 'PARAM', proto => '51' },
 293     ],
 294     'IPsecnat' => [
 295         "IPsec traffic and Nat-Traversal",
 296         { action => 'PARAM', proto => 'udp', dport => '500' },
 297         { action => 'PARAM', proto => 'udp', dport => '4500' },
 298         { action => 'PARAM', proto => '50' },
 299     ],
 300     'IRC' => [
 301         "Internet Relay Chat traffic",
 302         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 303     ],
 304     'Jetdirect' => [
 305         "HP Jetdirect printing",
 306         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 307     ],
 308     'L2TP' => [
 309         "Layer 2 Tunneling Protocol traffic",
 310         { action => 'PARAM', proto => 'udp', dport => '1701' },
 311     ],
 312     'LDAP' => [
 313         "Lightweight Directory Access Protocol traffic",
 314         { action => 'PARAM', proto => 'tcp', dport => '389' },
 315     ],
 316     'LDAPS' => [
 317         "Secure Lightweight Directory Access Protocol traffic",
 318         { action => 'PARAM', proto => 'tcp', dport => '636' },
 319     ],
 320     'MSNP' => [
 321         "Microsoft Notification Protocol",
 322         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 323     ],
 324     'MSSQL' => [
 325         "Microsoft SQL Server",
 326         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 327     ],
 328     'Mail' => [
 329         "Mail traffic (SMTP, SMTPS, Submission)",
 330         { action => 'PARAM', proto => 'tcp', dport => '25' },
 331         { action => 'PARAM', proto => 'tcp', dport => '465' },
 332         { action => 'PARAM', proto => 'tcp', dport => '587' },
 333     ],
 334     'MDNS' => [
 335         "Multicast DNS",
 336         { action => 'PARAM', proto => 'udp', dport => '5353' },
 337     ],
 338     'Munin' => [
 339         "Munin networked resource monitoring traffic",
 340         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 341     ],
 342     'MySQL' => [
 343         "MySQL server",
 344         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 345     ],
 346     'NNTP' => [
 347         "NNTP traffic (Usenet).",
 348         { action => 'PARAM', proto => 'tcp', dport => '119' },
 349     ],
 350     'NNTPS' => [
 351         "Encrypted NNTP traffic (Usenet)",
 352         { action => 'PARAM', proto => 'tcp', dport => '563' },
 353     ],
 354     'NTP' => [
 355         "Network Time Protocol (ntpd)",
 356         { action => 'PARAM', proto => 'udp', dport => '123' },
 357     ],
 358     'OSPF' => [
 359         "OSPF multicast traffic",
 360         { action => 'PARAM', proto => '89' },
 361     ],
 362     'OpenVPN' => [
 363         "OpenVPN traffic",
 364         { action => 'PARAM', proto => 'udp', dport => '1194' },
 365     ],
 366     'PCA' => [
 367         "Symantec PCAnywere (tm)",
 368         { action => 'PARAM', proto => 'udp', dport => '5632' },
 369         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 370     ],
 371     'POP3' => [
 372         "POP3 traffic",
 373         { action => 'PARAM', proto => 'tcp', dport => '110' },
 374     ],
 375     'POP3S' => [
 376         "Encrypted POP3 traffic",
 377         { action => 'PARAM', proto => 'tcp', dport => '995' },
 378     ],
 379     'PPtP' => [
 380         "Point-to-Point Tunneling Protocol",
 381         { action => 'PARAM', proto => '47' },
 382         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 383     ],
 384     'Ping' => [
 385         "ICMP echo request",
 386         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 387     ],
 388     'PostgreSQL' => [
 389         "PostgreSQL server",
 390         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 391     ],
 392     'Printer' => [
 393         "Line Printer protocol printing",
 394         { action => 'PARAM', proto => 'tcp', dport => '515' },
 395     ],
 396     'RDP' => [
 397         "Microsoft Remote Desktop Protocol traffic",
 398         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 399     ],
 400     'RIP' => [
 401         "Routing Information Protocol (bidirectional)",
 402         { action => 'PARAM', proto => 'udp', dport => '520' },
 403     ],
 404     'RNDC' => [
 405         "BIND remote management protocol",
 406         { action => 'PARAM', proto => 'tcp', dport => '953' },
 407     ],
 408     'Razor' => [
 409         "Razor Antispam System",
 410         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 411     ],
 412     'Rdate' => [
 413         "Remote time retrieval (rdate)",
 414         { action => 'PARAM', proto => 'tcp', dport => '37' },
 415     ],
 416     'Rsync' => [
 417         "Rsync server",
 418         { action => 'PARAM', proto => 'tcp', dport => '873' },
 419     ],
 420     'SANE' => [
 421         "SANE network scanning",
 422         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 423     ],
 424     'SMB' => [
 425         "Microsoft SMB traffic",
 426         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 427         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 428         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 429         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 430     ],
 431     'SMBswat' => [
 432         "Samba Web Administration Tool",
 433         { action => 'PARAM', proto => 'tcp', dport => '901' },
 434     ],
 435     'SMTP' => [
 436         "Simple Mail Transfer Protocol",
 437         { action => 'PARAM', proto => 'tcp', dport => '25' },
 438     ],
 439     'SMTPS' => [
 440         "Encrypted Simple Mail Transfer Protocol",
 441         { action => 'PARAM', proto => 'tcp', dport => '465' },
 442     ],
 443     'SNMP' => [
 444         "Simple Network Management Protocol",
 445         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 446         { action => 'PARAM', proto => 'tcp', dport => '161' },
 447     ],
 448     'SPAMD' => [
 449         "Spam Assassin SPAMD traffic",
 450         { action => 'PARAM', proto => 'tcp', dport => '783' },
 451     ],
 452     'SSH' => [
 453         "Secure shell traffic",
 454         { action => 'PARAM', proto => 'tcp', dport => '22' },
 455     ],
 456     'SVN' => [
 457         "Subversion server (svnserve)",
 458         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 459     ],
 460     'SixXS' => [
 461         "SixXS IPv6 Deployment and Tunnel Broker",
 462         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 463         { action => 'PARAM', proto => 'udp', dport => '3740' },
 464         { action => 'PARAM', proto => '41' },
 465         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 466     ],
 467     'Squid' => [
 468         "Squid web proxy traffic",
 469         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 470     ],
 471     'Submission' => [
 472         "Mail message submission traffic",
 473         { action => 'PARAM', proto => 'tcp', dport => '587' },
 474     ],
 475     'Syslog' => [
 476         "Syslog protocol (RFC 5424) traffic",
 477         { action => 'PARAM', proto => 'udp', dport => '514' },
 478         { action => 'PARAM', proto => 'tcp', dport => '514' },
 479     ],
 480     'TFTP' => [
 481         "Trivial File Transfer Protocol traffic",
 482         { action => 'PARAM', proto => 'udp', dport => '69' },
 483     ],
 484     'Telnet' => [
 485         "Telnet traffic",
 486         { action => 'PARAM', proto => 'tcp', dport => '23' },
 487     ],
 488     'Telnets' => [
 489         "Telnet over SSL",
 490         { action => 'PARAM', proto => 'tcp', dport => '992' },
 491     ],
 492     'Time' => [
 493         "RFC 868 Time protocol",
 494         { action => 'PARAM', proto => 'tcp', dport => '37' },
 495     ],
 496     'Trcrt' => [
 497         "Traceroute (for up to 30 hops) traffic",
 498         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 499         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 500     ],
 501     'VNC' => [
 502         "VNC traffic for VNC display's 0 - 99",
 503         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 504     ],
 505     'VNCL' => [
 506         "VNC traffic from Vncservers to Vncviewers in listen mode",
 507         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 508     ],
 509     'Web' => [
 510         "WWW traffic (HTTP and HTTPS)",
 511         { action => 'PARAM', proto => 'tcp', dport => '80' },
 512         { action => 'PARAM', proto => 'tcp', dport => '443' },
 513     ],
 514     'Webcache' => [
 515         "Web Cache/Proxy traffic (port 8080)",
 516         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 517     ],
 518     'Webmin' => [
 519         "Webmin traffic",
 520         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 521     ],
 522     'Whois' => [
 523         "Whois (nicname, RFC 3912) traffic",
 524         { action => 'PARAM', proto => 'tcp', dport => '43' },
 525     ],
 526 };
 527
 528 my $pve_fw_parsed_macros;
 529 my $pve_fw_macro_descr;
 530 my $pve_fw_macro_ipversion = {};
 531 my $pve_fw_preferred_macro_names = {};
 532
 533 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 534 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 535
 536 my $pve_std_chains = {};
 537 $pve_std_chains->{4} = {
 538     'PVEFW-SET-ACCEPT-MARK' => [
 539         "-j MARK --set-mark $FWACCEPTMARK_ON",
 540     ],
 541     'PVEFW-DropBroadcast' => [
 542         # same as shorewall 'Broadcast'
 543         # simply DROP BROADCAST/MULTICAST/ANYCAST
 544         # we can use this to reduce logging
 545         { action => 'DROP', dsttype => 'BROADCAST' },
 546         { action => 'DROP', dsttype => 'MULTICAST' },
 547         { action => 'DROP', dsttype => 'ANYCAST' },
 548         { action => 'DROP', dest => '224.0.0.0/4' },
 549     ],
 550     'PVEFW-reject' => [
 551         # same as shorewall 'reject'
 552         { action => 'DROP', dsttype => 'BROADCAST' },
 553         { action => 'DROP', source => '224.0.0.0/4' },
 554         { action => 'DROP', proto => 'icmp' },
 555         "-p tcp -j REJECT --reject-with tcp-reset",
 556         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 557         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 558         "-j REJECT --reject-with icmp-host-prohibited",
 559     ],
 560     'PVEFW-Drop' => [
 561         # same as shorewall 'Drop', which is equal to DROP,
 562         # but REJECT/DROP some packages to reduce logging,
 563         # and ACCEPT critical ICMP types
 564         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 565         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 566         { action => 'PVEFW-DropBroadcast' },
 567         # ACCEPT critical ICMP types
 568         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 569         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 570         # Drop packets with INVALID state
 571         "-m conntrack --ctstate INVALID -j DROP",
 572         # Drop Microsoft SMB noise
 573         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 574         { action => 'DROP', proto => 'udp', dport => '137:139'},
 575         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 576         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 577         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 578         # Drop new/NotSyn traffic so that it doesn't get logged
 579         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 580         # Drop DNS replies
 581         { action => 'DROP', proto => 'udp', sport => 53 },
 582     ],
 583     'PVEFW-Reject' => [
 584         # same as shorewall 'Reject', which is equal to Reject,
 585         # but REJECT/DROP some packages to reduce logging,
 586         # and ACCEPT critical ICMP types
 587         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 588         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 589         { action => 'PVEFW-DropBroadcast' },
 590         # ACCEPT critical ICMP types
 591         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 592         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 593         # Drop packets with INVALID state
 594         "-m conntrack --ctstate INVALID -j DROP",
 595         # Drop Microsoft SMB noise
 596         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 597         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 598         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 599         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 600         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 601         # Drop new/NotSyn traffic so that it doesn't get logged
 602         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 603         # Drop DNS replies
 604         { action => 'DROP', proto => 'udp', sport => 53 },
 605     ],
 606     'PVEFW-tcpflags' => [
 607         # same as shorewall tcpflags action.
 608         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 609         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 610         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 611         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 612         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 613         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 614     ],
 615     'PVEFW-smurfs' => [
 616         # same as shorewall smurfs action
 617         # Filter packets for smurfs (packets with a broadcast address as the source).
 618         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 619         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 620         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 621     ],
 622 };
 623
 624 $pve_std_chains->{6} = {
 625     'PVEFW-SET-ACCEPT-MARK' => [
 626         "-j MARK --set-mark $FWACCEPTMARK_ON",
 627     ],
 628     'PVEFW-DropBroadcast' => [
 629         # same as shorewall 'Broadcast'
 630         # simply DROP BROADCAST/MULTICAST/ANYCAST
 631         # we can use this to reduce logging
 632         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 633         # ipv6 addrtype does not work with kernel 2.6.32
 634         #{ action => 'DROP', dsttype => 'MULTICAST' },
 635         #{ action => 'DROP', dsttype => 'ANYCAST' },
 636         { action => 'DROP', dest => 'ff00::/8' },
 637         #{ action => 'DROP', dest => '224.0.0.0/4' },
 638     ],
 639     'PVEFW-reject' => [
 640         # same as shorewall 'reject'
 641         #{ action => 'DROP', dsttype => 'BROADCAST' },
 642         #{ action => 'DROP', source => '224.0.0.0/4' },
 643         { action => 'DROP', proto => 'icmpv6' },
 644         "-p tcp -j REJECT --reject-with tcp-reset",
 645         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 646         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 647         #"-j REJECT --reject-with icmp-host-prohibited",
 648     ],
 649     'PVEFW-Drop' => [
 650         # same as shorewall 'Drop', which is equal to DROP,
 651         # but REJECT/DROP some packages to reduce logging,
 652         # and ACCEPT critical ICMP types
 653         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 654         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 655         { action => 'PVEFW-DropBroadcast' },
 656         # ACCEPT critical ICMP types
 657         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 658         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 659         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 660
 661         # Drop packets with INVALID state
 662         "-m conntrack --ctstate INVALID -j DROP",
 663         # Drop Microsoft SMB noise
 664         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 665         { action => 'DROP', proto => 'udp', dport => '137:139'},
 666         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 667         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 668         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 669         # Drop new/NotSyn traffic so that it doesn't get logged
 670         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 671         # Drop DNS replies
 672         { action => 'DROP', proto => 'udp', sport => 53 },
 673     ],
 674     'PVEFW-Reject' => [
 675         # same as shorewall 'Reject', which is equal to Reject,
 676         # but REJECT/DROP some packages to reduce logging,
 677         # and ACCEPT critical ICMP types
 678         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 679         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 680         { action => 'PVEFW-DropBroadcast' },
 681         # ACCEPT critical ICMP types
 682         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 683         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 684         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 685
 686         # Drop packets with INVALID state
 687         "-m conntrack --ctstate INVALID -j DROP",
 688         # Drop Microsoft SMB noise
 689         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 690         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 691         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 692         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 693         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 694         # Drop new/NotSyn traffic so that it doesn't get logged
 695         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 696         # Drop DNS replies
 697         { action => 'DROP', proto => 'udp', sport => 53 },
 698     ],
 699     'PVEFW-tcpflags' => [
 700         # same as shorewall tcpflags action.
 701         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 702         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 703         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 704         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 705         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 706         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 707     ],
 708 };
 709
 710 # iptables -p icmp -h
 711 my $icmp_type_names = {
 712     any => 1,
 713     'echo-reply' => 1,
 714     'destination-unreachable' => 1,
 715     'network-unreachable' => 1,
 716     'host-unreachable' => 1,
 717     'protocol-unreachable' => 1,
 718     'port-unreachable' => 1,
 719     'fragmentation-needed' => 1,
 720     'source-route-failed' => 1,
 721     'network-unknown' => 1,
 722     'host-unknown' => 1,
 723     'network-prohibited' => 1,
 724     'host-prohibited' => 1,
 725     'TOS-network-unreachable' => 1,
 726     'TOS-host-unreachable' => 1,
 727     'communication-prohibited' => 1,
 728     'host-precedence-violation' => 1,
 729     'precedence-cutoff' => 1,
 730     'source-quench' => 1,
 731     'redirect' => 1,
 732     'network-redirect' => 1,
 733     'host-redirect' => 1,
 734     'TOS-network-redirect' => 1,
 735     'TOS-host-redirect' => 1,
 736     'echo-request' => 1,
 737     'router-advertisement' => 1,
 738     'router-solicitation' => 1,
 739     'time-exceeded' => 1,
 740     'ttl-zero-during-transit' => 1,
 741     'ttl-zero-during-reassembly' => 1,
 742     'parameter-problem' => 1,
 743     'ip-header-bad' => 1,
 744     'required-option-missing' => 1,
 745     'timestamp-request' => 1,
 746     'timestamp-reply' => 1,
 747     'address-mask-request' => 1,
 748     'address-mask-reply' => 1,
 749 };
 750
 751 # ip6tables -p icmpv6 -h
 752
 753 my $icmpv6_type_names = {
 754     'any' => 1,
 755     'destination-unreachable' => 1,
 756     'no-route' => 1,
 757     'communication-prohibited' => 1,
 758     'address-unreachable' => 1,
 759     'port-unreachable' => 1,
 760     'packet-too-big' => 1,
 761     'time-exceeded' => 1,
 762     'ttl-zero-during-transit' => 1,
 763     'ttl-zero-during-reassembly' => 1,
 764     'parameter-problem' => 1,
 765     'bad-header' => 1,
 766     'unknown-header-type' => 1,
 767     'unknown-option' => 1,
 768     'echo-request' => 1,
 769     'echo-reply' => 1,
 770     'router-solicitation' => 1,
 771     'router-advertisement' => 1,
 772     'neighbor-solicitation' => 1,
 773     'neighbour-solicitation' => 1,
 774     'neighbor-advertisement' => 1,
 775     'neighbour-advertisement' => 1,
 776     'redirect' => 1,
 777 };
 778
 779 sub init_firewall_macros {
 780
 781     $pve_fw_parsed_macros = {};
 782
 783     my $parse = sub {
 784         my ($k, $macro) = @_;
 785         my $lc_name = lc($k);
 786         $pve_fw_macro_ipversion->{$k} = 0;
 787         while (!ref($macro->[0])) {
 788             my $desc = shift @$macro;
 789             if ($desc eq 'ipv4only') {
 790                 $pve_fw_macro_ipversion->{$k} = 4;
 791             } elsif ($desc eq 'ipv6only') {
 792                 $pve_fw_macro_ipversion->{$k} = 6;
 793             } else {
 794                 $pve_fw_macro_descr->{$k} = $desc;
 795             }
 796         }
 797         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 798         $pve_fw_parsed_macros->{$k} = $macro;
 799     };
 800
 801     foreach my $k (keys %$pve_fw_macros) {
 802         &$parse($k, $pve_fw_macros->{$k});
 803     }
 804
 805     foreach my $k (keys %$pve_ipv6fw_macros) {
 806         next if $pve_fw_parsed_macros->{$k};
 807         &$parse($k, $pve_ipv6fw_macros->{$k});
 808         $pve_fw_macro_ipversion->{$k} = 6;
 809     }
 810 }
 811
 812 init_firewall_macros();
 813
 814 sub get_macros {
 815     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 816 }
 817
 818 my $etc_services;
 819
 820 sub get_etc_services {
 821
 822     return $etc_services if $etc_services;
 823
 824     my $filename = "/etc/services";
 825
 826     my $fh = IO::File->new($filename, O_RDONLY);
 827     if (!$fh) {
 828         warn "unable to read '$filename' - $!\n";
 829         return {};
 830     }
 831
 832     my $services = {};
 833
 834     while (my $line = <$fh>) {
 835         chomp ($line);
 836         next if $line =~m/^#/;
 837         next if ($line =~m/^\s*$/);
 838
 839         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 840             $services->{byid}->{$2}->{name} = $1;
 841             $services->{byid}->{$2}->{port} = $2;
 842             $services->{byid}->{$2}->{$3} = 1;
 843             $services->{byname}->{$1} = $services->{byid}->{$2};
 844         }
 845     }
 846
 847     close($fh);
 848
 849     $etc_services = $services;
 850
 851
 852     return $etc_services;
 853 }
 854
 855 my $etc_protocols;
 856
 857 sub get_etc_protocols {
 858     return $etc_protocols if $etc_protocols;
 859
 860     my $filename = "/etc/protocols";
 861
 862     my $fh = IO::File->new($filename, O_RDONLY);
 863     if (!$fh) {
 864         warn "unable to read '$filename' - $!\n";
 865         return {};
 866     }
 867
 868     my $protocols = {};
 869
 870     while (my $line = <$fh>) {
 871         chomp ($line);
 872         next if $line =~m/^#/;
 873         next if ($line =~m/^\s*$/);
 874
 875         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 876             $protocols->{byid}->{$2}->{name} = $1;
 877             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 878         }
 879     }
 880
 881     close($fh);
 882
 883     # add special case for ICMP v6
 884     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 885     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 886
 887     $etc_protocols = $protocols;
 888
 889     return $etc_protocols;
 890 }
 891
 892 my $__local_network;
 893
 894 sub local_network {
 895     my ($new_value) = @_;
 896
 897     $__local_network = $new_value if defined($new_value);
 898
 899     return $__local_network if defined($__local_network);
 900
 901     eval {
 902         my $nodename = PVE::INotify::nodename();
 903
 904         my $ip = PVE::Cluster::remote_node_ip($nodename);
 905
 906         my $testip = Net::IP->new($ip);
 907
 908         my $isv6 = $testip->version == 6;
 909         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 910                            : PVE::ProcFSTools::read_proc_net_route();
 911         foreach my $entry (@$routes) {
 912             my $mask;
 913             if ($isv6) {
 914                 $mask = $entry->{prefix};
 915                 next if !$mask; # skip the default route...
 916             } else {
 917                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 918                 next if !defined($mask);
 919             }
 920             my $cidr = "$entry->{dest}/$mask";
 921             my $testnet = Net::IP->new($cidr);
 922             my $overlap = $testnet->overlaps($testip);
 923             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 924                 $overlap == $Net::IP::IP_IDENTICAL)
 925             {
 926                 $__local_network = $cidr;
 927                 return;
 928             }
 929         }
 930     };
 931     warn $@ if $@;
 932
 933     return $__local_network;
 934 }
 935
 936 # ipset names are limited to 31 characters,
 937 # and we use '-v4' or '-v6' to indicate IP versions,
 938 # and we use '_swap' suffix for atomic update,
 939 # for example PVEFW-${VMID}-${ipset_name}_swap
 940
 941 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 942
 943 sub compute_ipset_chain_name {
 944     my ($vmid, $ipset_name, $ipversion) = @_;
 945
 946     $vmid = 0 if !defined($vmid);
 947
 948     my $id = "$vmid-${ipset_name}-v$ipversion";
 949
 950     if (length($id) > $max_iptables_ipset_name_length) {
 951         $id = PVE::Tools::fnv31a_hex($id);
 952     }
 953
 954     return "PVEFW-$id";
 955 }
 956
 957 sub compute_ipfilter_ipset_name {
 958     my ($iface) = @_;
 959
 960     return "ipfilter-$iface";
 961 }
 962
 963 sub parse_address_list {
 964     my ($str) = @_;
 965
 966     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 967         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 968         return;
 969     }
 970
 971     if ($str =~ m/^${ip_alias_pattern}$/) {
 972         die "alias name too long\n" if length($str) > $max_alias_name_length;
 973         return;
 974     }
 975
 976     my $count = 0;
 977     my $iprange = 0;
 978     my $ipversion;
 979
 980     my @elements = split(/,/, $str);
 981     die "extraneous commas in list\n" if $str ne join(',', @elements);
 982     foreach my $elem (@elements) {
 983         $count++;
 984         my $ip = Net::IP->new($elem);
 985         if (!$ip) {
 986             my $err = Net::IP::Error();
 987             die "invalid IP address: $err\n";
 988         }
 989         $iprange = 1 if $elem =~ m/-/;
 990
 991         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 992
 993         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 994             if $ipversion && ($new_ipversion != $ipversion);
 995
 996         $ipversion = $new_ipversion;
 997     }
 998
 999     die "you can't use a range in a list\n" if $iprange && $count > 1;
1000
1001     return $ipversion;
1002 }
1003
1004 sub parse_port_name_number_or_range {
1005     my ($str, $dport) = @_;
1006
1007     my $services = PVE::Firewall::get_etc_services();
1008     my $count = 0;
1009     my $icmp_port = 0;
1010
1011     my @elements = split(/,/, $str);
1012     die "extraneous commas in list\n" if $str ne join(',', @elements);
1013     foreach my $item (@elements) {
1014         $count++;
1015         if ($item =~ m/^(\d+):(\d+)$/) {
1016             my ($port1, $port2) = ($1, $2);
1017             die "invalid port '$port1'\n" if $port1 > 65535;
1018             die "invalid port '$port2'\n" if $port2 > 65535;
1019         } elsif ($item =~ m/^(\d+)$/) {
1020             my $port = $1;
1021             die "invalid port '$port'\n" if $port > 65535;
1022         } else {
1023             if ($dport && $icmp_type_names->{$item}) {
1024                 $icmp_port = 1;
1025             } elsif ($dport && $icmpv6_type_names->{$item}) {
1026                 $icmp_port = 1;
1027             } else {
1028                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1029             }
1030         }
1031     }
1032
1033     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1034
1035     return $count;
1036 }
1037
1038 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1039 sub pve_fw_verify_sport_spec {
1040    my ($portstr) = @_;
1041
1042    parse_port_name_number_or_range($portstr, 0);
1043
1044    return $portstr;
1045 }
1046
1047 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1048 sub pve_fw_verify_dport_spec {
1049    my ($portstr) = @_;
1050
1051    parse_port_name_number_or_range($portstr, 1);
1052
1053    return $portstr;
1054 }
1055
1056 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1057 sub pve_fw_verify_addr_spec {
1058    my ($list) = @_;
1059
1060    parse_address_list($list);
1061
1062    return $list;
1063 }
1064
1065 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1066 sub pve_fw_verify_protocol_spec {
1067    my ($proto) = @_;
1068
1069    my $protocols = get_etc_protocols();
1070
1071    die "unknown protocol '$proto'\n" if $proto &&
1072        !(defined($protocols->{byname}->{$proto}) ||
1073          defined($protocols->{byid}->{$proto}));
1074
1075    return $proto;
1076 }
1077
1078
1079 # helper function for API
1080
1081 sub copy_opject_with_digest {
1082     my ($object) = @_;
1083
1084     my $sha = Digest::SHA->new('sha1');
1085
1086     my $res = {};
1087     foreach my $k (sort keys %$object) {
1088         my $v = $object->{$k};
1089         next if !defined($v);
1090         $res->{$k} = $v;
1091         $sha->add($k, ':', $v, "\n");
1092     }
1093
1094     my $digest = $sha->hexdigest;
1095
1096     $res->{digest} = $digest;
1097
1098     return wantarray ? ($res, $digest) : $res;
1099 }
1100
1101 sub copy_list_with_digest {
1102     my ($list) = @_;
1103
1104     my $sha = Digest::SHA->new('sha1');
1105
1106     my $res = [];
1107     foreach my $entry (@$list) {
1108         my $data = {};
1109         foreach my $k (sort keys %$entry) {
1110             my $v = $entry->{$k};
1111             next if !defined($v);
1112             $data->{$k} = $v;
1113             # Note: digest ignores refs ($rule->{errors})
1114             # since Digest::SHA expects a series of bytes,
1115             #  we have to encode the value here to prevent errors when
1116             #  using utf8 characters (eg. in comments)
1117             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1118         }
1119         push @$res, $data;
1120     }
1121
1122     my $digest = $sha->hexdigest;
1123
1124     foreach my $entry (@$res) {
1125         $entry->{digest} = $digest;
1126     }
1127
1128     return wantarray ? ($res, $digest) : $res;
1129 }
1130
1131 our $cluster_option_properties = {
1132     enable => {
1133         description => "Enable or disable the firewall cluster wide.",
1134         type => 'integer',
1135         minimum => 0,
1136         optional => 1,
1137     },
1138     policy_in => {
1139         description => "Input policy.",
1140         type => 'string',
1141         optional => 1,
1142         enum => ['ACCEPT', 'REJECT', 'DROP'],
1143     },
1144     policy_out => {
1145         description => "Output policy.",
1146         type => 'string',
1147         optional => 1,
1148         enum => ['ACCEPT', 'REJECT', 'DROP'],
1149     },
1150 };
1151
1152 our $host_option_properties = {
1153     enable => {
1154         description => "Enable host firewall rules.",
1155         type => 'boolean',
1156         optional => 1,
1157     },
1158     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1159         description => "Log level for incoming traffic." }),
1160     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1161         description => "Log level for outgoing traffic." }),
1162     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1163         description => "Log level for illegal tcp flags filter." }),
1164     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1165         description => "Log level for SMURFS filter." }),
1166     nosmurfs => {
1167         description => "Enable SMURFS filter.",
1168         type => 'boolean',
1169         optional => 1,
1170     },
1171     tcpflags => {
1172         description => "Filter illegal combinations of TCP flags.",
1173         type => 'boolean',
1174         optional => 1,
1175     },
1176     nf_conntrack_max => {
1177         description => "Maximum number of tracked connections.",
1178         type => 'integer',
1179         optional => 1,
1180         minimum => 32768,
1181     },
1182     nf_conntrack_tcp_timeout_established => {
1183         description => "Conntrack established timeout.",
1184         type => 'integer',
1185         optional => 1,
1186         minimum => 7875,
1187     },
1188     ndp => {
1189         description => "Enable NDP.",
1190         type => 'boolean',
1191         optional => 1,
1192     },
1193 };
1194
1195 our $vm_option_properties = {
1196     enable => {
1197         description => "Enable/disable firewall rules.",
1198         type => 'boolean',
1199         optional => 1,
1200     },
1201     macfilter => {
1202         description => "Enable/disable MAC address filter.",
1203         type => 'boolean',
1204         optional => 1,
1205     },
1206     dhcp => {
1207         description => "Enable DHCP.",
1208         type => 'boolean',
1209         optional => 1,
1210     },
1211     ndp => {
1212         description => "Enable NDP.",
1213         type => 'boolean',
1214         optional => 1,
1215     },
1216     radv => {
1217         description => "Allow sending Router Advertisement.",
1218         type => 'boolean',
1219         optional => 1,
1220     },
1221     ipfilter => {
1222         description => "Enable default IP filters. " .
1223            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1224            "for every interface. Such ipsets implicitly contain sane default " .
1225            "restrictions such as restricting IPv6 link local addresses to " .
1226            "the one derived from the interface's MAC address. For containers " .
1227            "the configured IP addresses will be implicitly added.",
1228         type => 'boolean',
1229         optional => 1,
1230     },
1231     policy_in => {
1232         description => "Input policy.",
1233         type => 'string',
1234         optional => 1,
1235         enum => ['ACCEPT', 'REJECT', 'DROP'],
1236     },
1237     policy_out => {
1238         description => "Output policy.",
1239         type => 'string',
1240         optional => 1,
1241         enum => ['ACCEPT', 'REJECT', 'DROP'],
1242     },
1243     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1244         description => "Log level for incoming traffic." }),
1245     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1246         description => "Log level for outgoing traffic." }),
1247
1248 };
1249
1250
1251 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1252
1253 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1254
1255 my $rule_properties = {
1256     pos => {
1257         description => "Update rule at position <pos>.",
1258         type => 'integer',
1259         minimum => 0,
1260         optional => 1,
1261     },
1262     digest => get_standard_option('pve-config-digest'),
1263     type => {
1264         description => "Rule type.",
1265         type => 'string',
1266         optional => 1,
1267         enum => ['in', 'out', 'group'],
1268     },
1269     action => {
1270         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1271         type => 'string',
1272         optional => 1,
1273         pattern => $security_group_name_pattern,
1274         maxLength => 20,
1275         minLength => 2,
1276     },
1277     macro => {
1278         description => "Use predefined standard macro.",
1279         type => 'string',
1280         optional => 1,
1281         maxLength => 128,
1282     },
1283     iface => get_standard_option('pve-iface', {
1284         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1285         optional => 1
1286     }),
1287     source => {
1288         description => "Restrict packet source address. $addr_list_descr",
1289         type => 'string', format => 'pve-fw-addr-spec',
1290         optional => 1,
1291     },
1292     dest => {
1293         description => "Restrict packet destination address. $addr_list_descr",
1294         type => 'string', format => 'pve-fw-addr-spec',
1295         optional => 1,
1296     },
1297     proto => {
1298         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1299         type => 'string', format => 'pve-fw-protocol-spec',
1300         optional => 1,
1301     },
1302     enable => {
1303         description => "Flag to enable/disable a rule.",
1304         type => 'integer',
1305         minimum => 0,
1306         optional => 1,
1307     },
1308     sport => {
1309         description => "Restrict TCP/UDP source port. $port_descr",
1310         type => 'string', format => 'pve-fw-sport-spec',
1311         optional => 1,
1312     },
1313     dport => {
1314         description => "Restrict TCP/UDP destination port. $port_descr",
1315         type => 'string', format => 'pve-fw-dport-spec',
1316         optional => 1,
1317     },
1318     comment => {
1319         description => "Descriptive comment.",
1320         type => 'string',
1321         optional => 1,
1322     },
1323 };
1324
1325 sub add_rule_properties {
1326     my ($properties) = @_;
1327
1328     foreach my $k (keys %$rule_properties) {
1329         my $h = $rule_properties->{$k};
1330         # copy data, so that we can modify later without side effects
1331         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1332     }
1333
1334     return $properties;
1335 }
1336
1337 sub delete_rule_properties {
1338     my ($rule, $delete_str) = @_;
1339
1340     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1341         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1342             if !defined($rule_properties->{$opt});
1343         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1344             if $opt eq 'type' || $opt eq 'action';
1345         delete $rule->{$opt};
1346     }
1347
1348     return $rule;
1349 }
1350
1351 my $apply_macro = sub {
1352     my ($macro_name, $param, $verify, $ipversion) = @_;
1353
1354     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1355     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1356
1357     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1358         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1359     }
1360
1361     # skip macros which are specific to another ipversion
1362     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1363         return if $ipversion != $required;
1364     }
1365
1366     my $rules = [];
1367
1368     foreach my $templ (@$macro_rules) {
1369         my $rule = {};
1370         my $param_used = {};
1371         foreach my $k (keys %$templ) {
1372             my $v = $templ->{$k};
1373             if ($v eq 'PARAM') {
1374                 $v = $param->{$k};
1375                 $param_used->{$k} = 1;
1376             } elsif ($v eq 'DEST') {
1377                 $v = $param->{dest};
1378                 $param_used->{dest} = 1;
1379             } elsif ($v eq 'SOURCE') {
1380                 $v = $param->{source};
1381                 $param_used->{source} = 1;
1382             }
1383
1384             if (!defined($v)) {
1385                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1386                 raise_param_exc({ macro => $msg }) if $verify;
1387                 die "$msg\n";
1388             }
1389             $rule->{$k} = $v;
1390         }
1391         foreach my $k (keys %$param) {
1392             next if $k eq 'macro';
1393             next if !defined($param->{$k});
1394             next if $param_used->{$k};
1395             if (defined($rule->{$k})) {
1396                 if ($rule->{$k} ne $param->{$k}) {
1397                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1398                     raise_param_exc({ $k => $msg }) if $verify;
1399                     die "$msg\n";
1400                 }
1401             } else {
1402                 $rule->{$k} = $param->{$k};
1403             }
1404         }
1405         push @$rules, $rule;
1406     }
1407
1408     return $rules;
1409 };
1410
1411 my $rule_env_iface_lookup = {
1412     'ct' => 1,
1413     'vm' => 1,
1414     'group' => 0,
1415     'cluster' => 1,
1416     'host' => 1,
1417 };
1418
1419 sub verify_rule {
1420     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1421
1422     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1423
1424     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1425     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1426
1427     my $errors = $rule->{errors} || {};
1428
1429     my $error_count = 0;
1430
1431     my $add_error = sub {
1432         my ($param, $msg)  = @_;
1433         chomp $msg;
1434         raise_param_exc({ $param => $msg }) if !$noerr;
1435         $error_count++;
1436         $errors->{$param} = $msg if !$errors->{$param};
1437     };
1438
1439     my $ipversion;
1440     my $set_ip_version = sub {
1441         my $vers = shift;
1442         if ($vers) {
1443             die "detected mixed ipv4/ipv6 adresses in rule\n"
1444                 if $ipversion && ($vers != $ipversion);
1445             $ipversion = $vers;
1446         }
1447     };
1448
1449     my $check_ipset_or_alias_property = sub {
1450         my ($name, $expected_ipversion) = @_;
1451
1452         if (my $value = $rule->{$name}) {
1453             if ($value =~ m/^\+/) {
1454                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1455                     &$add_error($name, "no such ipset '$1'")
1456                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1457
1458                 } else {
1459                     &$add_error($name, "invalid ipset name '$value'");
1460                 }
1461             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1462                 my $alias = lc($value);
1463                 &$add_error($name, "no such alias '$value'")
1464                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1465                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1466                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1467
1468                 &$set_ip_version($e->{ipversion});
1469             }
1470         }
1471     };
1472
1473     my $type = $rule->{type};
1474     my $action = $rule->{action};
1475
1476     &$add_error('type', "missing property") if !$type;
1477     &$add_error('action', "missing property") if !$action;
1478
1479     if ($type) {
1480         if ($type eq  'in' || $type eq 'out') {
1481             &$add_error('action', "unknown action '$action'")
1482                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1483         } elsif ($type eq 'group') {
1484             &$add_error('type', "security groups not allowed")
1485                 if !$allow_groups;
1486             &$add_error('action', "invalid characters in security group name")
1487                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1488         } else {
1489             &$add_error('type', "unknown rule type '$type'");
1490         }
1491     }
1492
1493     if ($rule->{iface}) {
1494         &$add_error('type', "parameter -i not allowed for this rule type")
1495             if !$allow_iface;
1496         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1497         &$add_error('iface', $@) if $@;
1498         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1499             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1500                 if $rule->{iface} !~  m/^net(\d+)$/;
1501         }
1502     }
1503
1504     if ($rule->{macro}) {
1505         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1506             $rule->{macro} = $preferred_name;
1507         } else {
1508             &$add_error('macro', "unknown macro '$rule->{macro}'");
1509         }
1510     }
1511
1512     if ($rule->{proto}) {
1513         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1514         &$add_error('proto', $@) if $@;
1515         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1516         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1517     }
1518
1519     if ($rule->{dport}) {
1520         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1521         &$add_error('dport', $@) if $@;
1522         my $proto = $rule->{proto};
1523         &$add_error('proto', "missing property - 'dport' requires this property")
1524             if !$proto;
1525         &$add_error('dport', "protocol '$proto' does not support ports")
1526             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1527                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1528     }
1529
1530     if ($rule->{sport}) {
1531         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1532         &$add_error('sport', $@) if $@;
1533         my $proto = $rule->{proto};
1534         &$add_error('proto', "missing property - 'sport' requires this property")
1535             if !$proto;
1536         &$add_error('sport', "protocol '$proto' does not support ports")
1537             if !$PROTOCOLS_WITH_PORTS->{$proto};
1538     }
1539
1540     if ($rule->{source}) {
1541         eval {
1542             my $source_ipversion = parse_address_list($rule->{source});
1543             &$set_ip_version($source_ipversion);
1544         };
1545         &$add_error('source', $@) if $@;
1546         &$check_ipset_or_alias_property('source', $ipversion);
1547     }
1548
1549     if ($rule->{dest}) {
1550         eval {
1551             my $dest_ipversion = parse_address_list($rule->{dest});
1552             &$set_ip_version($dest_ipversion);
1553         };
1554         &$add_error('dest', $@) if $@;
1555         &$check_ipset_or_alias_property('dest', $ipversion);
1556     }
1557
1558     $rule->{ipversion} = $ipversion if $ipversion;
1559
1560     if ($rule->{macro} && !$error_count) {
1561         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1562         if (my $err = $@) {
1563             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1564                 my $eh = $err->{errors};
1565                 foreach my $p (keys %$eh) {
1566                     &$add_error($p, $eh->{$p});
1567                 }
1568             } else {
1569                 &$add_error('macro', "$err");
1570             }
1571         }
1572     }
1573
1574     $rule->{errors} = $errors if $error_count;
1575
1576     return $rule;
1577 }
1578
1579 sub copy_rule_data {
1580     my ($rule, $param) = @_;
1581
1582     foreach my $k (keys %$rule_properties) {
1583         if (defined(my $v = $param->{$k})) {
1584             if ($v eq '' || $v eq '-') {
1585                 delete $rule->{$k};
1586             } else {
1587                 $rule->{$k} = $v;
1588             }
1589         }
1590     }
1591
1592     return $rule;
1593 }
1594
1595 sub rules_modify_permissions {
1596     my ($rule_env) = @_;
1597
1598     if ($rule_env eq 'host') {
1599         return {
1600             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1601         };
1602     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1603         return {
1604             check => ['perm', '/', [ 'Sys.Modify' ]],
1605         };
1606     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1607         return {
1608             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1609         }
1610     }
1611
1612     return undef;
1613 }
1614
1615 sub rules_audit_permissions {
1616     my ($rule_env) = @_;
1617
1618     if ($rule_env eq 'host') {
1619         return {
1620             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1621         };
1622     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1623         return {
1624             check => ['perm', '/', [ 'Sys.Audit' ]],
1625         };
1626     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1627         return {
1628             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1629         }
1630     }
1631
1632     return undef;
1633 }
1634
1635 # core functions
1636 my $bridge_firewall_enabled = 0;
1637
1638 sub enable_bridge_firewall {
1639
1640     return if $bridge_firewall_enabled; # only once
1641
1642     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1643     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1644
1645     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1646     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1647
1648     $bridge_firewall_enabled = 1;
1649 }
1650
1651 sub iptables_restore_cmdlist {
1652     my ($cmdlist) = @_;
1653
1654     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1655 }
1656
1657 sub ip6tables_restore_cmdlist {
1658     my ($cmdlist) = @_;
1659
1660     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1661 }
1662
1663 sub ipset_restore_cmdlist {
1664     my ($cmdlist) = @_;
1665
1666     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1667 }
1668
1669 sub iptables_get_chains {
1670     my ($iptablescmd) = @_;
1671
1672     $iptablescmd = "iptables" if !$iptablescmd;
1673
1674     my $res = {};
1675
1676     # check what chains we want to track
1677     my $is_pvefw_chain = sub {
1678         my $name = shift;
1679
1680         return 1 if $name =~ m/^PVEFW-\S+$/;
1681
1682         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1683
1684         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1685
1686         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1687         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1688
1689         return undef;
1690     };
1691
1692     my $table = '';
1693
1694     my $hooks = {};
1695
1696     my $parser = sub {
1697         my $line = shift;
1698
1699         return if $line =~ m/^#/;
1700         return if $line =~ m/^\s*$/;
1701
1702         if ($line =~ m/^\*(\S+)$/) {
1703             $table = $1;
1704             return;
1705         }
1706
1707         return if $table ne 'filter';
1708
1709         if ($line =~ m/^:(\S+)\s/) {
1710             my $chain = $1;
1711             return if !&$is_pvefw_chain($chain);
1712             $res->{$chain} = "unknown";
1713         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1714             my ($chain, $sig) = ($1, $2);
1715             return if !&$is_pvefw_chain($chain);
1716             $res->{$chain} = $sig;
1717         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1718             $hooks->{$1} = 1;
1719         } else {
1720             # simply ignore the rest
1721             return;
1722         }
1723     };
1724
1725     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1726
1727     return wantarray ? ($res, $hooks) : $res;
1728 }
1729
1730 sub iptables_chain_digest {
1731     my ($rules) = @_;
1732     my $digest = Digest::SHA->new('sha1');
1733     foreach my $rule (@$rules) { # order is important
1734         $digest->add($rule);
1735     }
1736     return $digest->b64digest;
1737 }
1738
1739 sub ipset_chain_digest {
1740     my ($rules) = @_;
1741
1742     my $digest = Digest::SHA->new('sha1');
1743     foreach my $rule (sort @$rules) { # note: sorted
1744         $digest->add($rule);
1745     }
1746     return $digest->b64digest;
1747 }
1748
1749 sub ipset_get_chains {
1750
1751     my $res = {};
1752     my $chains = {};
1753
1754     my $parser = sub {
1755         my $line = shift;
1756
1757         return if $line =~ m/^#/;
1758         return if $line =~ m/^\s*$/;
1759         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1760             my $chain = $1;
1761             $line =~ s/\s+$//; # delete trailing white space
1762             push @{$chains->{$chain}}, $line;
1763         } else {
1764             # simply ignore the rest
1765             return;
1766         }
1767     };
1768
1769     run_command("/sbin/ipset save", outfunc => $parser);
1770
1771     # compute digest for each chain
1772     foreach my $chain (keys %$chains) {
1773         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1774     }
1775
1776     return $res;
1777 }
1778
1779 sub ruleset_generate_match {
1780     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1781
1782     return if defined($rule->{enable}) && !$rule->{enable};
1783     return if $rule->{errors};
1784
1785     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1786
1787     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1788     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1789
1790     my @cmd = ();
1791
1792     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1793     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1794
1795     my $source = $rule->{source};
1796     my $dest = $rule->{dest};
1797
1798     if ($source) {
1799         if ($source =~ m/^\+/) {
1800             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1801                 my $name = $1;
1802                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1803                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1804                     push @cmd, "-m set --match-set ${ipset_chain} src";
1805                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1806                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1807                     push @cmd, "-m set --match-set ${ipset_chain} src";
1808                 } else {
1809                     die "no such ipset '$name'\n";
1810                 }
1811             } else {
1812                 die "invalid security group name '$source'\n";
1813             }
1814         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1815             my $alias = lc($source);
1816             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1817             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1818             die "no such alias '$source'\n" if !$e;
1819             push @cmd, "-s $e->{cidr}";
1820         } elsif ($source =~ m/\-/){
1821             push @cmd, "-m iprange --src-range $source";
1822         } else {
1823             push @cmd, "-s $source";
1824         }
1825     }
1826
1827     if ($dest) {
1828         if ($dest =~ m/^\+/) {
1829             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1830                 my $name = $1;
1831                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1832                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1833                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1834                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1835                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1836                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1837                 } else {
1838                     die "no such ipset '$name'\n";
1839                 }
1840             } else {
1841                 die "invalid security group name '$dest'\n";
1842             }
1843         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1844             my $alias = lc($dest);
1845             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1846             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1847             die "no such alias '$dest'\n" if !$e;
1848             push @cmd, "-d $e->{cidr}";
1849         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1850             push @cmd, "-m iprange --dst-range $dest";
1851         } else {
1852             push @cmd, "-d $dest";
1853         }
1854     }
1855
1856     if (my $proto = $rule->{proto}) {
1857         push @cmd, "-p $proto";
1858
1859         my $multiport = 0;
1860         $multiport++ if $nbdport > 1;
1861         $multiport++ if $nbsport > 1;
1862
1863         push @cmd, "--match multiport" if $multiport;
1864
1865         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1866             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1867
1868         if ($rule->{dport}) {
1869             if ($proto eq 'icmp') {
1870                 # Note: we use dport to store --icmp-type
1871                 die "unknown icmp-type '$rule->{dport}'\n"
1872                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1873                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1874             } elsif ($proto eq 'icmpv6') {
1875                 # Note: we use dport to store --icmpv6-type
1876                 die "unknown icmpv6-type '$rule->{dport}'\n"
1877                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1878                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1879             } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1880                 die "protocol $proto does not have ports\n";
1881             } else {
1882                 if ($nbdport > 1) {
1883                     if ($multiport == 2) {
1884                         push @cmd,  "--ports $rule->{dport}";
1885                     } else {
1886                         push @cmd, "--dports $rule->{dport}";
1887                     }
1888                 } else {
1889                     push @cmd, "--dport $rule->{dport}";
1890                 }
1891             }
1892         }
1893
1894         if ($rule->{sport}) {
1895             die "protocol $proto does not have ports\n"
1896                  if !$PROTOCOLS_WITH_PORTS->{$proto};
1897             if ($nbsport > 1) {
1898                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1899             } else {
1900                 push @cmd, "--sport $rule->{sport}";
1901             }
1902         }
1903     } elsif ($rule->{dport} || $rule->{sport}) {
1904         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1905         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1906     }
1907
1908     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1909
1910     return scalar(@cmd) ? join(' ', @cmd) : undef;
1911 }
1912
1913 sub ruleset_generate_action {
1914     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1915
1916     my @cmd = ();
1917
1918     if (my $action = $rule->{action}) {
1919         $action = $actions->{$action} if defined($actions->{$action});
1920         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1921         push @cmd, $goto ? "-g $action" : "-j $action";
1922     }
1923
1924     return scalar(@cmd) ? join(' ', @cmd) : undef;
1925 }
1926
1927 sub ruleset_generate_cmdstr {
1928     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1929     my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1930     my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1931
1932     return undef if !(defined($match) or defined($action));
1933     my $ret = defined($match) ? $match : "";
1934     $ret = "$ret $action" if defined($action);
1935     return $ret;
1936 }
1937
1938 sub ruleset_generate_rule {
1939     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1940
1941     my $rules;
1942
1943     if ($rule->{macro}) {
1944         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1945     } else {
1946         $rules = [ $rule ];
1947     }
1948
1949     # update all or nothing
1950
1951     my @mstrs = ();
1952     my @astrs = ();
1953     foreach my $tmp (@$rules) {
1954         my $m = ruleset_generate_match($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1955         my $a = ruleset_generate_action($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1956         if (defined $m or defined $a) {
1957             push @mstrs, defined($m) ? $m : "";
1958             push @astrs, defined($a) ? $a : "";
1959         }
1960     }
1961
1962     for my $i (0 .. $#mstrs) {
1963         ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i]);
1964     }
1965 }
1966
1967 sub ruleset_generate_rule_insert {
1968     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1969
1970     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1971
1972     my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto);
1973     my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto);
1974     if (defined $match && defined $action) {
1975         ruleset_insertrule($ruleset, $chain, $match, $action);
1976     }
1977 }
1978
1979 sub ruleset_create_chain {
1980     my ($ruleset, $chain) = @_;
1981
1982     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1983     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1984
1985     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1986
1987     $ruleset->{$chain} = [];
1988 }
1989
1990 sub ruleset_chain_exist {
1991     my ($ruleset, $chain) = @_;
1992
1993     return $ruleset->{$chain} ? 1 : undef;
1994 }
1995
1996 sub ruleset_addrule_old {
1997    my ($ruleset, $chain, $rule) = @_;
1998
1999    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2000
2001    push @{$ruleset->{$chain}}, "-A $chain $rule";
2002 }
2003
2004 sub ruleset_addrule {
2005    my ($ruleset, $chain, $match, $action, $log) = @_;
2006
2007    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2008
2009    push @{$ruleset->{$chain}}, "-A $chain $match $action";
2010 }
2011
2012 sub ruleset_insertrule {
2013    my ($ruleset, $chain, $match, $action, $log) = @_;
2014
2015    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2016
2017    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2018 }
2019
2020 sub get_log_rule_base {
2021     my ($chain, $vmid, $msg, $loglevel) = @_;
2022
2023     die "internal error - no log level" if !defined($loglevel);
2024
2025     $vmid = 0 if !defined($vmid);
2026
2027     # Note: we use special format for prefix to pass further
2028     # info to log daemon (VMID, LOGVELEL and CHAIN)
2029
2030     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2031 }
2032
2033 sub ruleset_addlog {
2034     my ($ruleset, $chain, $vmid, $msg, $loglevel, $match) = @_;
2035
2036     return if !defined($loglevel);
2037
2038     my $logaction = get_log_rule_base($chain, $vmid, $msg, $loglevel);
2039
2040     $match = "" if !defined $match;
2041     ruleset_addrule($ruleset, $chain, $match, $logaction);
2042 }
2043
2044 sub ruleset_add_chain_policy {
2045     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2046
2047     if ($policy eq 'ACCEPT') {
2048
2049         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2050                               { ACCEPT =>  $accept_action});
2051
2052     } elsif ($policy eq 'DROP') {
2053
2054         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2055
2056         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2057
2058         ruleset_addrule($ruleset, $chain, "", "-j DROP");
2059     } elsif ($policy eq 'REJECT') {
2060         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2061
2062         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2063
2064         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject");
2065     } else {
2066         # should not happen
2067         die "internal error: unknown policy '$policy'";
2068     }
2069 }
2070
2071 sub ruleset_chain_add_ndp {
2072     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2073     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2074
2075     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2076     if ($direction ne 'OUT' || $options->{radv}) {
2077         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2078     }
2079     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2080     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2081 }
2082
2083 sub ruleset_chain_add_conn_filters {
2084     my ($ruleset, $chain, $accept) = @_;
2085
2086     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2087     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2088 }
2089
2090 sub ruleset_chain_add_input_filters {
2091     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2092
2093     if ($cluster_conf->{ipset}->{blacklist}){
2094         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2095             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2096             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2097             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP");
2098         }
2099         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2100         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2101     }
2102
2103     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2104         if ($ipversion == 4) {
2105             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2106         }
2107     }
2108
2109     if ($options->{tcpflags}) {
2110         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2111     }
2112 }
2113
2114 sub ruleset_create_vm_chain {
2115     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2116
2117     ruleset_create_chain($ruleset, $chain);
2118     my $accept = generate_nfqueue($options);
2119
2120     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2121         if ($ipversion == 4) {
2122             if ($direction eq 'OUT') {
2123                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2124                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2125                                         proto => 'udp', sport => 68, dport => 67 });
2126             } else {
2127                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2128                                       { action => 'ACCEPT',
2129                                         proto => 'udp', sport => 67, dport => 68 });
2130             }
2131         } elsif ($ipversion == 6) {
2132             if ($direction eq 'OUT') {
2133                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2134                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2135                                         proto => 'udp', sport => 546, dport => 547 });
2136             } else {
2137                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2138                                       { action => 'ACCEPT',
2139                                         proto => 'udp', sport => 547, dport => 546 });
2140             }
2141         }
2142
2143     }
2144
2145     if ($direction eq 'OUT') {
2146         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2147             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2148         }
2149         if ($ipversion == 6 && !$options->{radv}) {
2150             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2151         }
2152         if ($ipfilter_ipset) {
2153             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2154         }
2155         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2156     }
2157
2158     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2159     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2160 }
2161
2162 sub ruleset_add_group_rule {
2163     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2164
2165     my $group = $rule->{action};
2166     my $group_chain = "GROUP-$group-$direction";
2167     if(!ruleset_chain_exist($ruleset, $group_chain)){
2168         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2169     }
2170
2171     if ($direction eq 'OUT' && $rule->{iface_out}) {
2172         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2173     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2174         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2175     } else {
2176         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2177     }
2178
2179     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2180 }
2181
2182 sub ruleset_generate_vm_rules {
2183     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2184
2185     my $lc_direction = lc($direction);
2186
2187     my $in_accept = generate_nfqueue($options);
2188
2189     foreach my $rule (@$rules) {
2190         next if $rule->{iface} && $rule->{iface} ne $netid;
2191         next if !$rule->{enable} || $rule->{errors};
2192         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2193
2194         if ($rule->{type} eq 'group') {
2195             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2196                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2197         } else {
2198             next if $rule->{type} ne $lc_direction;
2199             eval {
2200                 if ($direction eq 'OUT') {
2201                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2202                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2203                                           undef, $cluster_conf, $vmfw_conf);
2204                 } else {
2205                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2206                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2207                                           undef, $cluster_conf, $vmfw_conf);
2208                 }
2209             };
2210             warn $@ if $@;
2211         }
2212     }
2213 }
2214
2215 sub generate_nfqueue {
2216     my ($options) = @_;
2217
2218     if ($options->{ips}) {
2219         my $action = "NFQUEUE";
2220         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2221             if (defined($3) && defined($1)) {
2222                 $action .= " --queue-balance $1:$3";
2223             } elsif (defined($1)) {
2224                 $action .= " --queue-num $1";
2225             }
2226         }
2227         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2228         return $action;
2229     } else {
2230         return "ACCEPT";
2231     }
2232 }
2233
2234 sub ruleset_generate_vm_ipsrules {
2235     my ($ruleset, $options, $direction, $iface) = @_;
2236
2237     if ($options->{ips} && $direction eq 'IN') {
2238         my $nfqueue = generate_nfqueue($options);
2239
2240         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2241             ruleset_create_chain($ruleset, "PVEFW-IPS");
2242         }
2243
2244         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2245     }
2246 }
2247
2248 sub generate_tap_rules_direction {
2249     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2250
2251     my $lc_direction = lc($direction);
2252
2253     my $rules = $vmfw_conf->{rules};
2254
2255     my $options = $vmfw_conf->{options};
2256     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2257
2258     my $tapchain = "$iface-$direction";
2259
2260     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2261     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2262         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2263
2264     # create chain with mac and ip filter
2265     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2266
2267     if ($options->{enable}) {
2268         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2269
2270         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2271
2272         # implement policy
2273         my $policy;
2274
2275         if ($direction eq 'OUT') {
2276             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2277         } else {
2278         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2279         }
2280
2281         my $accept = generate_nfqueue($options);
2282         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2283         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2284     } else {
2285         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2286         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2287     }
2288
2289     # plug the tap chain to bridge chain
2290     if ($direction eq 'IN') {
2291         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2292                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2293     } else {
2294         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2295                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2296     }
2297 }
2298
2299 sub enable_host_firewall {
2300     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2301
2302     my $options = $hostfw_conf->{options};
2303     my $cluster_options = $cluster_conf->{options};
2304     my $rules = $hostfw_conf->{rules};
2305     my $cluster_rules = $cluster_conf->{rules};
2306
2307     # host inbound firewall
2308     my $chain = "PVEFW-HOST-IN";
2309     ruleset_create_chain($ruleset, $chain);
2310
2311     my $loglevel = get_option_log_level($options, "log_level_in");
2312
2313     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2314
2315     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2316     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2317     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2318
2319     # we use RETURN because we need to check also tap rules
2320     my $accept_action = 'RETURN';
2321
2322     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2323
2324     # add host rules first, so that cluster wide rules can be overwritten
2325     foreach my $rule (@$rules, @$cluster_rules) {
2326         next if !$rule->{enable} || $rule->{errors};
2327         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2328
2329         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2330
2331         eval {
2332             if ($rule->{type} eq 'group') {
2333                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2334             } elsif ($rule->{type} eq 'in') {
2335                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2336                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2337                                       undef, $cluster_conf, $hostfw_conf);
2338             }
2339         };
2340         warn $@ if $@;
2341         delete $rule->{iface_in};
2342     }
2343
2344     # allow standard traffic for management ipset (includes cluster network)
2345     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2346     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2347     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2348     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2349     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2350     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2351
2352     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2353     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2354
2355     # corosync
2356     if ($localnet && ($ipversion == $localnet_ver)) {
2357         my $corosync_rule = "-p udp --dport 5404:5405";
2358         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2359         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2360     }
2361
2362     # implement input policy
2363     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2364     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2365
2366     # host outbound firewall
2367     $chain = "PVEFW-HOST-OUT";
2368     ruleset_create_chain($ruleset, $chain);
2369
2370     $loglevel = get_option_log_level($options, "log_level_out");
2371
2372     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2373
2374     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2375
2376     # we use RETURN because we may want to check other thigs later
2377     $accept_action = 'RETURN';
2378     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2379
2380     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2381
2382     # add host rules first, so that cluster wide rules can be overwritten
2383     foreach my $rule (@$rules, @$cluster_rules) {
2384         next if !$rule->{enable} || $rule->{errors};
2385         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2386
2387         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2388         eval {
2389             if ($rule->{type} eq 'group') {
2390                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2391             } elsif ($rule->{type} eq 'out') {
2392                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2393                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2394                                       undef, $cluster_conf, $hostfw_conf);
2395             }
2396         };
2397         warn $@ if $@;
2398         delete $rule->{iface_out};
2399     }
2400
2401     # allow standard traffic on cluster network
2402     if ($localnet && ($ipversion == $localnet_ver)) {
2403         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2404         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2405         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2406         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2407
2408         my $corosync_rule = "-p udp --dport 5404:5405";
2409         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2410         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2411     }
2412
2413     # implement output policy
2414     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2415     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2416
2417     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2418     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2419 }
2420
2421 sub generate_group_rules {
2422     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2423
2424     my $rules = $cluster_conf->{groups}->{$group};
2425
2426     if (!$rules) {
2427         warn "no such security group '$group'\n";
2428         $rules = []; # create empty chain
2429     }
2430
2431     my $chain = "GROUP-${group}-IN";
2432
2433     ruleset_create_chain($ruleset, $chain);
2434     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2435
2436     foreach my $rule (@$rules) {
2437         next if $rule->{type} ne 'in';
2438         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2439         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2440                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2441                               undef, $cluster_conf);
2442     }
2443
2444     $chain = "GROUP-${group}-OUT";
2445
2446     ruleset_create_chain($ruleset, $chain);
2447     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2448
2449     foreach my $rule (@$rules) {
2450         next if $rule->{type} ne 'out';
2451         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2452         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2453         # check also other tap rules later
2454         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2455                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2456                               undef, $cluster_conf);
2457     }
2458 }
2459
2460 my $MAX_NETS = 32;
2461 my $valid_netdev_names = {};
2462 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2463     $valid_netdev_names->{"net$i"} = 1;
2464 }
2465
2466 sub get_mark_values {
2467     my ($value, $mask) = @_;
2468     $value = hex($value) if $value =~ /^0x/;
2469     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2470     $mask = 0xffffffff if !defined($mask);
2471     return ($value, $mask);
2472 }
2473
2474 sub parse_fw_rule {
2475     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2476
2477     my $orig_line = $line;
2478
2479     my $rule = {};
2480
2481     # we can add single line comments to the end of the rule
2482     if ($line =~ s/#\s*(.*?)\s*$//) {
2483         $rule->{comment} = decode('utf8', $1);
2484     }
2485
2486     # we can disable a rule when prefixed with '|'
2487
2488     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2489
2490     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2491         die "unable to parse rule: $line\n";
2492
2493     $rule->{type} = lc($1);
2494     $rule->{action} = $2;
2495
2496     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2497         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2498             $rule->{macro} = $1;
2499             $rule->{action} = $2;
2500         }
2501     }
2502
2503     while (length($line)) {
2504         if ($line =~ s/^-i (\S+)\s*//) {
2505             $rule->{iface} = $1;
2506             next;
2507         }
2508
2509         last if $rule->{type} eq 'group';
2510
2511         if ($line =~ s/^-p (\S+)\s*//) {
2512             $rule->{proto} = $1;
2513             next;
2514         }
2515
2516         if ($line =~ s/^-dport (\S+)\s*//) {
2517             $rule->{dport} = $1;
2518             next;
2519         }
2520
2521         if ($line =~ s/^-sport (\S+)\s*//) {
2522             $rule->{sport} = $1;
2523             next;
2524         }
2525         if ($line =~ s/^-source (\S+)\s*//) {
2526             $rule->{source} = $1;
2527             next;
2528         }
2529         if ($line =~ s/^-dest (\S+)\s*//) {
2530             $rule->{dest} = $1;
2531             next;
2532         }
2533
2534         last;
2535     }
2536
2537     die "unable to parse rule parameters: $line\n" if length($line);
2538
2539     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2540     if ($rule->{errors}) {
2541         # The verbose flag really means we're running from the CLI and want
2542         # output on the console - in the other case we really want such errors
2543         # to go into the syslog instead.
2544         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2545         $log->("$prefix - errors in rule parameters: $orig_line\n");
2546         foreach my $p (keys %{$rule->{errors}}) {
2547             $log->("  $p: $rule->{errors}->{$p}\n");
2548         }
2549     }
2550
2551     return $rule;
2552 }
2553
2554 sub parse_vmfw_option {
2555     my ($line) = @_;
2556
2557     my ($opt, $value);
2558
2559     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2560
2561     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2562         $opt = lc($1);
2563         $value = int($2);
2564     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2565         $opt = lc($1);
2566         $value = $2 ? lc($3) : '';
2567     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2568         $opt = lc($1);
2569         $value = uc($3);
2570     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2571         $opt = lc($1);
2572         $value = $2;
2573     } else {
2574         die "can't parse option '$line'\n"
2575     }
2576
2577     return ($opt, $value);
2578 }
2579
2580 sub parse_hostfw_option {
2581     my ($line) = @_;
2582
2583     my ($opt, $value);
2584
2585     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2586
2587     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2588         $opt = lc($1);
2589         $value = int($2);
2590     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2591         $opt = lc($1);
2592         $value = $2 ? lc($3) : '';
2593     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2594         $opt = lc($1);
2595         $value = int($2);
2596     } else {
2597         die "can't parse option '$line'\n"
2598     }
2599
2600     return ($opt, $value);
2601 }
2602
2603 sub parse_clusterfw_option {
2604     my ($line) = @_;
2605
2606     my ($opt, $value);
2607
2608     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2609         $opt = lc($1);
2610         $value = int($2);
2611         if (($value > 1) && ((time() - $value) > 60)) {
2612             $value = 0
2613         }
2614     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2615         $opt = lc($1);
2616         $value = uc($3);
2617     } else {
2618         die "can't parse option '$line'\n"
2619     }
2620
2621     return ($opt, $value);
2622 }
2623
2624 sub resolve_alias {
2625     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2626
2627     my $alias = lc($cidr);
2628     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2629     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2630
2631     die "no such alias '$cidr'\n" if !$e;;
2632
2633     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2634 }
2635
2636 sub parse_ip_or_cidr {
2637     my ($cidr) = @_;
2638
2639     my $ipversion;
2640
2641     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2642         $cidr =~ s|/128$||;
2643         $ipversion = 6;
2644     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2645         $cidr =~ s|/32$||;
2646         $ipversion = 4;
2647     } else {
2648         die "value does not look like a valid IP address or CIDR network\n";
2649     }
2650
2651     return wantarray ? ($cidr, $ipversion) : $cidr;
2652 }
2653
2654 sub parse_alias {
2655     my ($line) = @_;
2656
2657     # we can add single line comments to the end of the line
2658     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2659
2660     if ($line =~ m/^(\S+)\s(\S+)$/) {
2661         my ($name, $cidr) = ($1, $2);
2662         my $ipversion;
2663
2664         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2665
2666         my $data = {
2667             name => $name,
2668             cidr => $cidr,
2669             ipversion => $ipversion,
2670         };
2671         $data->{comment} = $comment  if $comment;
2672         return $data;
2673     }
2674
2675     return undef;
2676 }
2677
2678 sub generic_fw_config_parser {
2679     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2680
2681     my $section;
2682     my $group;
2683
2684     my $res = $empty_conf;
2685
2686     while (defined(my $line = <$fh>)) {
2687         next if $line =~ m/^#/;
2688         next if $line =~ m/^\s*$/;
2689
2690         chomp $line;
2691
2692         my $linenr = $fh->input_line_number();
2693         my $prefix = "$filename (line $linenr)";
2694
2695         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2696             $section = 'options';
2697             next;
2698         }
2699
2700         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2701             $section = 'aliases';
2702             next;
2703         }
2704
2705         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2706             $section = 'groups';
2707             $group = lc($1);
2708             my $comment = $2;
2709             eval {
2710                 die "security group name too long\n" if length($group) > $max_group_name_length;
2711                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2712             };
2713             if (my $err = $@) {
2714                 ($section, $group, $comment) = undef;
2715                 warn "$prefix: $err";
2716                 next;
2717             }
2718
2719             $res->{$section}->{$group} = [];
2720             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2721                 if $comment;
2722             next;
2723         }
2724
2725         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2726             $section = 'rules';
2727             next;
2728         }
2729
2730         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2731             $section = 'ipset';
2732             $group = lc($1);
2733             my $comment = $2;
2734             eval {
2735                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2736                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2737             };
2738             if (my $err = $@) {
2739                 ($section, $group, $comment) = undef;
2740                 warn "$prefix: $err";
2741                 next;
2742             }
2743
2744             $res->{$section}->{$group} = [];
2745             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2746                 if $comment;
2747             next;
2748         }
2749
2750         if (!$section) {
2751             warn "$prefix: skip line - no section\n";
2752             next;
2753         }
2754
2755         if ($section eq 'options') {
2756             eval {
2757                 my ($opt, $value);
2758                 if ($rule_env eq 'cluster') {
2759                     ($opt, $value) = parse_clusterfw_option($line);
2760                 } elsif ($rule_env eq 'host') {
2761                     ($opt, $value) = parse_hostfw_option($line);
2762                 } else {
2763                     ($opt, $value) = parse_vmfw_option($line);
2764                 }
2765                 $res->{options}->{$opt} = $value;
2766             };
2767             warn "$prefix: $@" if $@;
2768         } elsif ($section eq 'aliases') {
2769             eval {
2770                 my $data = parse_alias($line);
2771                 $res->{aliases}->{lc($data->{name})} = $data;
2772             };
2773             warn "$prefix: $@" if $@;
2774         } elsif ($section eq 'rules') {
2775             my $rule;
2776             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2777             if (my $err = $@) {
2778                 warn "$prefix: $err";
2779                 next;
2780             }
2781             push @{$res->{$section}}, $rule;
2782         } elsif ($section eq 'groups') {
2783             my $rule;
2784             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2785             if (my $err = $@) {
2786                 warn "$prefix: $err";
2787                 next;
2788             }
2789             push @{$res->{$section}->{$group}}, $rule;
2790         } elsif ($section eq 'ipset') {
2791             # we can add single line comments to the end of the rule
2792             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2793
2794             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2795             my $nomatch = $1;
2796             my $cidr = $2;
2797             my $errors;
2798
2799             if ($nomatch && !$feature_ipset_nomatch) {
2800                 $errors->{nomatch} = "nomatch not supported by kernel";
2801             }
2802
2803             eval {
2804                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2805                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2806                 } else {
2807                     $cidr = parse_ip_or_cidr($cidr);
2808                 }
2809             };
2810             if (my $err = $@) {
2811                 chomp $err;
2812                 $errors->{cidr} = $err;
2813             }
2814
2815             if ($cidr =~ m!/0+$!) {
2816                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2817             }
2818
2819             my $entry = { cidr => $cidr };
2820             $entry->{nomatch} = 1 if $nomatch;
2821             $entry->{comment} = $comment if $comment;
2822             $entry->{errors} =  $errors if $errors;
2823
2824             if ($verbose && $errors) {
2825                 warn "$prefix - errors in ipset '$group': $line\n";
2826                 foreach my $p (keys %{$errors}) {
2827                     warn "  $p: $errors->{$p}\n";
2828                 }
2829             }
2830
2831             push @{$res->{$section}->{$group}}, $entry;
2832         } else {
2833             warn "$prefix: skip line - unknown section\n";
2834             next;
2835         }
2836     }
2837
2838     return $res;
2839 }
2840
2841 sub parse_hostfw_config {
2842     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2843
2844     my $empty_conf = { rules => [], options => {}};
2845
2846     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2847 }
2848
2849 sub parse_vmfw_config {
2850     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2851
2852     my $empty_conf = {
2853         rules => [],
2854         options => {},
2855         aliases => {},
2856         ipset => {} ,
2857         ipset_comments => {},
2858     };
2859
2860     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2861 }
2862
2863 sub parse_clusterfw_config {
2864     my ($filename, $fh, $verbose) = @_;
2865
2866     my $section;
2867     my $group;
2868
2869     my $empty_conf = {
2870         rules => [],
2871         options => {},
2872         aliases => {},
2873         groups => {},
2874         group_comments => {},
2875         ipset => {} ,
2876         ipset_comments => {},
2877     };
2878
2879     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2880 }
2881
2882 sub run_locked {
2883     my ($code, @param) = @_;
2884
2885     my $timeout = 10;
2886
2887     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2888
2889     die $@ if $@;
2890
2891     return $res;
2892 }
2893
2894 sub read_local_vm_config {
2895
2896     my $qemu = {};
2897     my $lxc = {};
2898
2899     my $vmdata = { qemu => $qemu, lxc => $lxc };
2900
2901     my $vmlist = PVE::Cluster::get_vmlist();
2902     return $vmdata if !$vmlist || !$vmlist->{ids};
2903     my $ids = $vmlist->{ids};
2904
2905     foreach my $vmid (keys %$ids) {
2906         next if !$vmid; # skip VE0
2907         my $d = $ids->{$vmid};
2908         next if !$d->{node} || $d->{node} ne $nodename;
2909         next if !$d->{type};
2910         if ($d->{type} eq 'qemu') {
2911             if ($have_qemu_server) {
2912                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2913                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2914                     $qemu->{$vmid} = $conf;
2915                 }
2916             }
2917         } elsif ($d->{type} eq 'lxc') {
2918             if ($have_lxc) {
2919                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2920                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2921                     $lxc->{$vmid} = $conf;
2922                 }
2923             }
2924         }
2925     }
2926
2927     return $vmdata;
2928 };
2929
2930 sub load_vmfw_conf {
2931     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2932
2933     my $vmfw_conf = {};
2934
2935     $dir = $pvefw_conf_dir if !defined($dir);
2936
2937     my $filename = "$dir/$vmid.fw";
2938     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2939         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2940         $vmfw_conf->{vmid} = $vmid;
2941     }
2942
2943     return $vmfw_conf;
2944 }
2945
2946 my $format_rules = sub {
2947     my ($rules, $allow_iface) = @_;
2948
2949     my $raw = '';
2950
2951     foreach my $rule (@$rules) {
2952         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2953             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2954             $raw .= uc($rule->{type});
2955             if ($rule->{macro}) {
2956                 $raw .= " $rule->{macro}($rule->{action})";
2957             } else {
2958                 $raw .= " " . $rule->{action};
2959             }
2960             if ($allow_iface && $rule->{iface}) {
2961                 $raw .= " -i $rule->{iface}";
2962             }
2963
2964             if ($rule->{type} ne  'group')  {
2965                 $raw .= " -source $rule->{source}" if $rule->{source};
2966                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2967                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2968                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2969                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2970             }
2971
2972             $raw .= " # " . encode('utf8', $rule->{comment})
2973                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2974             $raw .= "\n";
2975         } else {
2976             die "unknown rule type '$rule->{type}'";
2977         }
2978     }
2979
2980     return $raw;
2981 };
2982
2983 my $format_options = sub {
2984     my ($options) = @_;
2985
2986     my $raw = '';
2987
2988     $raw .= "[OPTIONS]\n\n";
2989     foreach my $opt (keys %$options) {
2990         $raw .= "$opt: $options->{$opt}\n";
2991     }
2992     $raw .= "\n";
2993
2994     return $raw;
2995 };
2996
2997 my $format_aliases = sub {
2998     my ($aliases) = @_;
2999
3000     my $raw = '';
3001
3002     $raw .= "[ALIASES]\n\n";
3003     foreach my $k (keys %$aliases) {
3004         my $e = $aliases->{$k};
3005         $raw .= "$e->{name} $e->{cidr}";
3006         $raw .= " # " . encode('utf8', $e->{comment})
3007             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3008         $raw .= "\n";
3009     }
3010     $raw .= "\n";
3011
3012     return $raw;
3013 };
3014
3015 my $format_ipsets = sub {
3016     my ($fw_conf) = @_;
3017
3018     my $raw = '';
3019
3020     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3021         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3022             my $utf8comment = encode('utf8', $comment);
3023             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3024         } else {
3025             $raw .= "[IPSET $ipset]\n\n";
3026         }
3027         my $options = $fw_conf->{ipset}->{$ipset};
3028
3029         my $nethash = {};
3030         foreach my $entry (@$options) {
3031             $nethash->{$entry->{cidr}} = $entry;
3032         }
3033
3034         foreach my $cidr (sort keys %$nethash) {
3035             my $entry = $nethash->{$cidr};
3036             my $line = $entry->{nomatch} ? '!' : '';
3037             $line .= $entry->{cidr};
3038             $line .= " # " . encode('utf8', $entry->{comment})
3039                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3040             $raw .= "$line\n";
3041         }
3042
3043         $raw .= "\n";
3044     }
3045
3046     return $raw;
3047 };
3048
3049 sub save_vmfw_conf {
3050     my ($vmid, $vmfw_conf) = @_;
3051
3052     my $raw = '';
3053
3054     my $options = $vmfw_conf->{options};
3055     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3056
3057     my $aliases = $vmfw_conf->{aliases};
3058     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3059
3060     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3061
3062     my $rules = $vmfw_conf->{rules} || [];
3063     if ($rules && scalar(@$rules)) {
3064         $raw .= "[RULES]\n\n";
3065         $raw .= &$format_rules($rules, 1);
3066         $raw .= "\n";
3067     }
3068
3069     my $filename = "$pvefw_conf_dir/$vmid.fw";
3070     if ($raw) {
3071         mkdir $pvefw_conf_dir;
3072         PVE::Tools::file_set_contents($filename, $raw);
3073     } else {
3074         unlink $filename;
3075     }
3076 }
3077
3078 sub remove_vmfw_conf {
3079     my ($vmid) = @_;
3080
3081     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3082
3083     unlink $vmfw_conffile;
3084 }
3085
3086 sub clone_vmfw_conf {
3087     my ($vmid, $newid) = @_;
3088
3089     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3090     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3091
3092     if (-f $clonevm_conffile) {
3093         unlink $clonevm_conffile;
3094     }
3095     if (-f $sourcevm_conffile) {
3096         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3097         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3098     }
3099 }
3100
3101 sub read_vm_firewall_configs {
3102     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3103
3104     my $vmfw_configs = {};
3105
3106     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3107         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3108         next if !$vmfw_conf->{options}; # skip if file does not exists
3109         $vmfw_configs->{$vmid} = $vmfw_conf;
3110     }
3111     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3112         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3113         next if !$vmfw_conf->{options}; # skip if file does not exists
3114         $vmfw_configs->{$vmid} = $vmfw_conf;
3115     }
3116
3117     return $vmfw_configs;
3118 }
3119
3120 sub get_option_log_level {
3121     my ($options, $k) = @_;
3122
3123     my $v = $options->{$k};
3124     $v = $default_log_level if !defined($v);
3125
3126     return undef if $v eq '' || $v eq 'nolog';
3127
3128     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3129
3130     return $v if ($v >= 0) && ($v <= 7);
3131
3132     warn "unknown log level ($k = '$v')\n";
3133
3134     return undef;
3135 }
3136
3137 sub generate_std_chains {
3138     my ($ruleset, $options, $ipversion) = @_;
3139
3140     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3141
3142     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3143
3144     my $chain;
3145
3146     if ($ipversion == 4) {
3147         # same as shorewall smurflog.
3148         $chain = 'PVEFW-smurflog';
3149         $std_chains->{$chain} = [];
3150
3151         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3152         push @{$std_chains->{$chain}}, "-j DROP";
3153     }
3154
3155     # same as shorewall logflags action.
3156     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3157     $chain = 'PVEFW-logflags';
3158     $std_chains->{$chain} = [];
3159
3160     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3161     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3162     push @{$std_chains->{$chain}}, "-j DROP";
3163
3164     foreach my $chain (keys %$std_chains) {
3165         ruleset_create_chain($ruleset, $chain);
3166         foreach my $rule (@{$std_chains->{$chain}}) {
3167             if (ref($rule)) {
3168                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3169             } else {
3170                 ruleset_addrule_old($ruleset, $chain, $rule);
3171             }
3172         }
3173     }
3174 }
3175
3176 sub generate_ipset_chains {
3177     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3178
3179     foreach my $ipset (keys %{$ipsets}) {
3180
3181         my $options = $ipsets->{$ipset};
3182
3183         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3184             if (my $ips = $device_ips->{$1}) {
3185                 $options = [@$options, @$ips];
3186             }
3187         }
3188
3189         # remove duplicates
3190         my $nethash = {};
3191         foreach my $entry (@$options) {
3192             next if $entry->{errors}; # skip entries with errors
3193             eval {
3194                 my ($cidr, $ver);
3195                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3196                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3197                 } else {
3198                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3199                 }
3200                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3201                 if ($ver == 6) {
3202                     # ip_compress_address takes an address only, no CIDR
3203                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3204                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3205                     $cidr .= $prefix_len if defined($prefix_len);
3206                     $cidr =~ s|/128$||;
3207                 } else {
3208                     $cidr =~ s|/32$||;
3209                 }
3210
3211                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3212             };
3213             warn $@ if $@;
3214         }
3215
3216         foreach my $ipversion (4, 6) {
3217             my $data = $nethash->{$ipversion};
3218
3219             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3220
3221             my $hashsize = scalar(@$options);
3222             if ($hashsize <= 64) {
3223                 $hashsize = 64;
3224             } else {
3225                 $hashsize = round_powerof2($hashsize);
3226             }
3227
3228             my $family = $ipversion == "6" ? "inet6" : "inet";
3229
3230             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3231
3232             foreach my $cidr (sort keys %$data) {
3233                 my $entry = $data->{$cidr};
3234
3235                 my $cmd = "add $name $cidr";
3236                 if ($entry->{nomatch}) {
3237                     if ($feature_ipset_nomatch) {
3238                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3239                     } else {
3240                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3241                     }
3242                 } else {
3243                     push @{$ipset_ruleset->{$name}}, $cmd;
3244                 }
3245             }
3246         }
3247     }
3248 }
3249
3250 sub round_powerof2 {
3251     my ($int) = @_;
3252
3253     $int--;
3254     $int |= $int >> $_ foreach (1,2,4,8,16);
3255     return ++$int;
3256 }
3257
3258 sub load_clusterfw_conf {
3259     my ($filename, $verbose) = @_;
3260
3261     $filename = $clusterfw_conf_filename if !defined($filename);
3262
3263     my $cluster_conf = {};
3264     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3265         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3266     }
3267
3268     return $cluster_conf;
3269 }
3270
3271 sub save_clusterfw_conf {
3272     my ($cluster_conf) = @_;
3273
3274     my $raw = '';
3275
3276     my $options = $cluster_conf->{options};
3277     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3278
3279     my $aliases = $cluster_conf->{aliases};
3280     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3281
3282     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3283
3284     my $rules = $cluster_conf->{rules};
3285     if ($rules && scalar(@$rules)) {
3286         $raw .= "[RULES]\n\n";
3287         $raw .= &$format_rules($rules, 1);
3288         $raw .= "\n";
3289     }
3290
3291     if ($cluster_conf->{groups}) {
3292         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3293             my $rules = $cluster_conf->{groups}->{$group};
3294             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3295                 my $utf8comment = encode('utf8', $comment);
3296                 $raw .= "[group $group] # $utf8comment\n\n";
3297             } else {
3298                 $raw .= "[group $group]\n\n";
3299             }
3300
3301             $raw .= &$format_rules($rules, 0);
3302             $raw .= "\n";
3303         }
3304     }
3305
3306     if ($raw) {
3307         mkdir $pvefw_conf_dir;
3308         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3309     } else {
3310         unlink $clusterfw_conf_filename;
3311     }
3312 }
3313
3314 sub load_hostfw_conf {
3315     my ($cluster_conf, $filename, $verbose) = @_;
3316
3317     $filename = $hostfw_conf_filename if !defined($filename);
3318
3319     my $hostfw_conf = {};
3320     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3321         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3322     }
3323     return $hostfw_conf;
3324 }
3325
3326 sub save_hostfw_conf {
3327     my ($hostfw_conf) = @_;
3328
3329     my $raw = '';
3330
3331     my $options = $hostfw_conf->{options};
3332     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3333
3334     my $rules = $hostfw_conf->{rules};
3335     if ($rules && scalar(@$rules)) {
3336         $raw .= "[RULES]\n\n";
3337         $raw .= &$format_rules($rules, 1);
3338         $raw .= "\n";
3339     }
3340
3341     if ($raw) {
3342         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3343     } else {
3344         unlink $hostfw_conf_filename;
3345     }
3346 }
3347
3348 sub compile {
3349     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3350
3351     my $vmfw_configs;
3352
3353     if ($vmdata) { # test mode
3354         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3355         my $filename = "$testdir/cluster.fw";
3356         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3357
3358         $filename = "$testdir/host.fw";
3359         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3360
3361         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3362     } else { # normal operation
3363         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3364
3365         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3366
3367         $vmdata = read_local_vm_config();
3368         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3369     }
3370
3371     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3372
3373     my $localnet;
3374     if ($cluster_conf->{aliases}->{local_network}) {
3375         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3376     } else {
3377         my $localnet_ver;
3378         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3379
3380         $cluster_conf->{aliases}->{local_network} = {
3381             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3382     }
3383
3384     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3385
3386     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3387     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3388     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3389
3390     return ($ruleset, $ipset_ruleset, $rulesetv6);
3391 }
3392
3393 sub compile_iptables_filter {
3394     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3395
3396     my $ruleset = {};
3397
3398     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3399     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3400
3401     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3402
3403     my $hostfw_options = $hostfw_conf->{options} || {};
3404
3405     # fixme: what log level should we use here?
3406     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3407
3408     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3409
3410     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3411     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3412
3413     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3414
3415     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3416     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3417
3418     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3419
3420     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3421
3422     if ($hostfw_enable) {
3423         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3424         warn $@ if $@; # just to be sure - should not happen
3425     }
3426
3427     # generate firewall rules for QEMU VMs
3428     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3429         eval {
3430             my $conf = $vmdata->{qemu}->{$vmid};
3431             my $vmfw_conf = $vmfw_configs->{$vmid};
3432             return if !$vmfw_conf;
3433
3434             foreach my $netid (sort keys %$conf) {
3435                 next if $netid !~ m/^net(\d+)$/;
3436                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3437                 next if !$net->{firewall};
3438                 my $iface = "tap${vmid}i$1";
3439
3440                 my $macaddr = $net->{macaddr};
3441                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3442                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3443                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3444                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3445             }
3446         };
3447         warn $@ if $@; # just to be sure - should not happen
3448     }
3449
3450     # generate firewall rules for LXC containers
3451     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3452         eval {
3453             my $conf = $vmdata->{lxc}->{$vmid};
3454             my $vmfw_conf = $vmfw_configs->{$vmid};
3455             return if !$vmfw_conf;
3456
3457             if ($vmfw_conf->{options}->{enable}) {
3458                 foreach my $netid (sort keys %$conf) {
3459                     next if $netid !~ m/^net(\d+)$/;
3460                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3461                     next if !$net->{firewall};
3462                     my $iface = "veth${vmid}i$1";
3463                     my $macaddr = $net->{hwaddr};
3464                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3465                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3466                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3467                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3468                 }
3469             }
3470         };
3471         warn $@ if $@; # just to be sure - should not happen
3472     }
3473
3474     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3475         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3476     }
3477
3478     return $ruleset;
3479 }
3480
3481 sub mac_to_linklocal {
3482     my ($macaddr) = @_;
3483     my @parts = split(/:/, $macaddr);
3484     # The standard link local address uses the fe80::/64 prefix with the
3485     # modified EUI-64 identifier derived from the MAC address by flipping the
3486     # universal/local bit and inserting FF:FE in the middle.
3487     # See RFC 4291.
3488     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3489     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3490     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3491 }
3492
3493 sub compile_ipsets {
3494     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3495
3496     my $localnet;
3497     if ($cluster_conf->{aliases}->{local_network}) {
3498         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3499     } else {
3500         my $localnet_ver;
3501         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3502
3503         $cluster_conf->{aliases}->{local_network} = {
3504             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3505     }
3506
3507     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3508
3509
3510     my $ipset_ruleset = {};
3511
3512     # generate ipsets for QEMU VMs
3513     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3514         eval {
3515             my $conf = $vmdata->{qemu}->{$vmid};
3516             my $vmfw_conf = $vmfw_configs->{$vmid};
3517             return if !$vmfw_conf;
3518
3519             # When the 'ipfilter' option is enabled every device for which there
3520             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3521             # ipset.
3522             # The reason is that ipfilter ipsets are always filled with standard
3523             # IPv6 link-local filters.
3524             my $ipsets = $vmfw_conf->{ipset};
3525             my $implicit_sets = {};
3526
3527             my $device_ips = {};
3528             foreach my $netid (keys %$conf) {
3529                 next if $netid !~ m/^net(\d+)$/;
3530                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3531                 next if !$net->{firewall};
3532
3533                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3534                     $implicit_sets->{"ipfilter-$netid"} = [];
3535                 }
3536
3537                 my $macaddr = $net->{macaddr};
3538                 my $linklocal = mac_to_linklocal($macaddr);
3539                 $device_ips->{$netid} = [
3540                     { cidr => $linklocal },
3541                     { cidr => 'fe80::/10', nomatch => 1 }
3542                 ];
3543             }
3544
3545             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3546             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3547         };
3548         warn $@ if $@; # just to be sure - should not happen
3549     }
3550
3551     # generate firewall rules for LXC containers
3552     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3553         eval {
3554             my $conf = $vmdata->{lxc}->{$vmid};
3555             my $vmfw_conf = $vmfw_configs->{$vmid};
3556             return if !$vmfw_conf;
3557
3558             # When the 'ipfilter' option is enabled every device for which there
3559             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3560             # ipset.
3561             # The reason is that ipfilter ipsets are always filled with standard
3562             # IPv6 link-local filters, as well as the IP addresses configured
3563             # for the container.
3564             my $ipsets = $vmfw_conf->{ipset};
3565             my $implicit_sets = {};
3566
3567             my $device_ips = {};
3568             foreach my $netid (keys %$conf) {
3569                 next if $netid !~ m/^net(\d+)$/;
3570                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3571                 next if !$net->{firewall};
3572
3573                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3574                     $implicit_sets->{"ipfilter-$netid"} = [];
3575                 }
3576
3577                 my $macaddr = $net->{hwaddr};
3578                 my $linklocal = mac_to_linklocal($macaddr);
3579                 my $set = $device_ips->{$netid} = [
3580                     { cidr => $linklocal },
3581                     { cidr => 'fe80::/10', nomatch => 1 }
3582                 ];
3583                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3584                     push @$set, { cidr => $1 };
3585                 }
3586                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3587                     push @$set, { cidr => $1 };
3588                 }
3589             }
3590
3591             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3592             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3593         };
3594         warn $@ if $@; # just to be sure - should not happen
3595     }
3596
3597     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3598
3599     return $ipset_ruleset;
3600 }
3601
3602 sub get_ruleset_status {
3603     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3604
3605     my $statushash = {};
3606
3607     foreach my $chain (sort keys %$ruleset) {
3608         my $sig = &$digest_fn($ruleset->{$chain});
3609
3610         $statushash->{$chain}->{sig} = $sig;
3611
3612         my $oldsig = $active_chains->{$chain};
3613         if (!defined($oldsig)) {
3614             $statushash->{$chain}->{action} = 'create';
3615         } else {
3616             if ($oldsig eq $sig) {
3617                 $statushash->{$chain}->{action} = 'exists';
3618             } else {
3619                 $statushash->{$chain}->{action} = 'update';
3620             }
3621         }
3622         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3623         foreach my $cmd (@{$ruleset->{$chain}}) {
3624             print "\t$cmd\n" if $verbose;
3625         }
3626     }
3627
3628     foreach my $chain (sort keys %$active_chains) {
3629         if (!defined($ruleset->{$chain})) {
3630             my $sig = $active_chains->{$chain};
3631             $statushash->{$chain}->{action} = 'delete';
3632             $statushash->{$chain}->{sig} = $sig;
3633             print "delete $chain ($sig)\n" if $verbose;
3634         }
3635     }
3636
3637     return $statushash;
3638 }
3639
3640 sub print_sig_rule {
3641     my ($chain, $sig) = @_;
3642
3643     # We just use this to store a SHA1 checksum used to detect changes
3644     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3645 }
3646
3647 sub get_ruleset_cmdlist {
3648     my ($ruleset, $verbose, $iptablescmd) = @_;
3649
3650     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3651
3652     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3653     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3654
3655     # create missing chains first
3656     foreach my $chain (sort keys %$ruleset) {
3657         my $stat = $statushash->{$chain};
3658         die "internal error" if !$stat;
3659         next if $stat->{action} ne 'create';
3660
3661         $cmdlist .= ":$chain - [0:0]\n";
3662     }
3663
3664     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3665         my $chain = "PVEFW-$h";
3666         if ($ruleset->{$chain} && !$hooks->{$h}) {
3667             $cmdlist .= "-A $h -j $chain\n";
3668         }
3669     }
3670
3671     foreach my $chain (sort keys %$ruleset) {
3672         my $stat = $statushash->{$chain};
3673         die "internal error" if !$stat;
3674
3675         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3676             $cmdlist .= "-F $chain\n";
3677             foreach my $cmd (@{$ruleset->{$chain}}) {
3678                 $cmdlist .= "$cmd\n";
3679             }
3680             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3681         } elsif ($stat->{action} eq 'delete') {
3682             die "internal error"; # this should not happen
3683         } elsif ($stat->{action} eq 'exists') {
3684             # do nothing
3685         } else {
3686             die "internal error - unknown status '$stat->{action}'";
3687         }
3688     }
3689
3690     foreach my $chain (keys %$statushash) {
3691         next if $statushash->{$chain}->{action} ne 'delete';
3692         $cmdlist .= "-F $chain\n";
3693     }
3694     foreach my $chain (keys %$statushash) {
3695         next if $statushash->{$chain}->{action} ne 'delete';
3696         next if $chain eq 'PVEFW-INPUT';
3697         next if $chain eq 'PVEFW-OUTPUT';
3698         next if $chain eq 'PVEFW-FORWARD';
3699         $cmdlist .= "-X $chain\n";
3700     }
3701
3702     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3703
3704     $cmdlist .= "COMMIT\n";
3705
3706     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3707 }
3708
3709 sub get_ipset_cmdlist {
3710     my ($ruleset, $verbose) = @_;
3711
3712     my $cmdlist = "";
3713
3714     my $delete_cmdlist = "";
3715
3716     my $active_chains = ipset_get_chains();
3717     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3718
3719     # remove stale _swap chains
3720     foreach my $chain (keys %$active_chains) {
3721         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3722             $cmdlist .= "destroy $chain\n";
3723         }
3724     }
3725
3726     foreach my $chain (keys %$ruleset) {
3727         my $stat = $statushash->{$chain};
3728         die "internal error" if !$stat;
3729
3730         if ($stat->{action} eq 'create') {
3731             foreach my $cmd (@{$ruleset->{$chain}}) {
3732                 $cmdlist .= "$cmd\n";
3733             }
3734         }
3735     }
3736
3737     foreach my $chain (keys %$ruleset) {
3738         my $stat = $statushash->{$chain};
3739         die "internal error" if !$stat;
3740
3741         if ($stat->{action} eq 'update') {
3742             my $chain_swap = $chain."_swap";
3743
3744             foreach my $cmd (@{$ruleset->{$chain}}) {
3745                 $cmd =~ s/$chain/$chain_swap/;
3746                 $cmdlist .= "$cmd\n";
3747             }
3748             $cmdlist .= "swap $chain_swap $chain\n";
3749             $cmdlist .= "flush $chain_swap\n";
3750             $cmdlist .= "destroy $chain_swap\n";
3751         }
3752     }
3753
3754      # the remove unused chains
3755     foreach my $chain (keys %$statushash) {
3756         next if $statushash->{$chain}->{action} ne 'delete';
3757
3758         $delete_cmdlist .= "flush $chain\n";
3759         $delete_cmdlist .= "destroy $chain\n";
3760     }
3761
3762     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3763
3764     return ($cmdlist, $delete_cmdlist, $changes);
3765 }
3766
3767 sub apply_ruleset {
3768     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3769
3770     enable_bridge_firewall();
3771
3772     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3773         get_ipset_cmdlist($ipset_ruleset, $verbose);
3774
3775     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3776     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3777
3778     if ($verbose) {
3779         if ($ipset_changes) {
3780             print "ipset changes:\n";
3781             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3782             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3783         }
3784
3785         if ($changes) {
3786             print "iptables changes:\n";
3787             print $cmdlist;
3788         }
3789
3790         if ($changesv6) {
3791             print "ip6tables changes:\n";
3792             print $cmdlistv6;
3793         }
3794     }
3795
3796     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3797     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3798
3799     ipset_restore_cmdlist($ipset_create_cmdlist);
3800
3801     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3802     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3803
3804     iptables_restore_cmdlist($cmdlist);
3805
3806     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3807     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3808
3809     ip6tables_restore_cmdlist($cmdlistv6);
3810
3811     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3812     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3813
3814     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3815
3816     # test: re-read status and check if everything is up to date
3817     my $active_chains = iptables_get_chains();
3818     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3819
3820     my $errors;
3821     foreach my $chain (sort keys %$ruleset) {
3822         my $stat = $statushash->{$chain};
3823         if ($stat->{action} ne 'exists') {
3824             warn "unable to update chain '$chain'\n";
3825             $errors = 1;
3826         }
3827     }
3828
3829     my $active_chainsv6 = iptables_get_chains("ip6tables");
3830     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3831
3832     foreach my $chain (sort keys %$rulesetv6) {
3833         my $stat = $statushashv6->{$chain};
3834         if ($stat->{action} ne 'exists') {
3835             warn "unable to update chain '$chain'\n";
3836             $errors = 1;
3837         }
3838     }
3839
3840     die "unable to apply firewall changes\n" if $errors;
3841
3842     update_nf_conntrack_max($hostfw_conf);
3843
3844     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3845
3846 }
3847
3848 sub update_nf_conntrack_max {
3849     my ($hostfw_conf) = @_;
3850
3851     my $max = 65536; # reasonable default
3852
3853     my $options = $hostfw_conf->{options} || {};
3854
3855     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3856         $max = $options->{nf_conntrack_max};
3857         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3858     }
3859
3860     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3861     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3862
3863     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3864
3865     if ($current != $max) {
3866         my $hashsize = int($max/4);
3867         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3868         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3869     }
3870 }
3871
3872 sub update_nf_conntrack_tcp_timeout_established {
3873     my ($hostfw_conf) = @_;
3874
3875     my $options = $hostfw_conf->{options} || {};
3876
3877     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3878
3879     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3880 }
3881
3882 sub remove_pvefw_chains {
3883
3884     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3885     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3886     PVE::Firewall::remove_pvefw_chains_ipset();
3887
3888 }
3889
3890 sub remove_pvefw_chains_iptables {
3891     my ($iptablescmd) = @_;
3892
3893     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3894     my $cmdlist = "*filter\n";
3895
3896     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3897         if ($hooks->{$h}) {
3898             $cmdlist .= "-D $h -j PVEFW-$h\n";
3899         }
3900     }
3901
3902     foreach my $chain (keys %$chash) {
3903         $cmdlist .= "-F $chain\n";
3904     }
3905
3906     foreach my $chain (keys %$chash) {
3907         $cmdlist .= "-X $chain\n";
3908     }
3909     $cmdlist .= "COMMIT\n";
3910
3911     if($iptablescmd eq "ip6tables") {
3912         ip6tables_restore_cmdlist($cmdlist);
3913     } else {
3914         iptables_restore_cmdlist($cmdlist);
3915     }
3916 }
3917
3918 sub remove_pvefw_chains_ipset {
3919
3920     my $ipset_chains = ipset_get_chains();
3921
3922     my $cmdlist = "";
3923
3924     foreach my $chain (keys %$ipset_chains) {
3925         $cmdlist .= "flush $chain\n";
3926         $cmdlist .= "destroy $chain\n";
3927     }
3928
3929     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3930 }
3931
3932 sub init {
3933     my $cluster_conf = load_clusterfw_conf();
3934     my $cluster_options = $cluster_conf->{options};
3935     my $enable = $cluster_options->{enable};
3936
3937     return if !$enable;
3938
3939     # load required modules here
3940 }
3941
3942 sub update {
3943     my $code = sub {
3944
3945         my $cluster_conf = load_clusterfw_conf();
3946         my $cluster_options = $cluster_conf->{options};
3947
3948         if (!$cluster_options->{enable}) {
3949             PVE::Firewall::remove_pvefw_chains();
3950             return;
3951         }
3952
3953         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3954
3955         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3956
3957         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3958     };
3959
3960     run_locked($code);
3961 }
3962
3963 1;