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 File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::LXC
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     require PVE::QemuConfig;
  32     $have_qemu_server = 1;
  33 };
  34
  35 my $have_lxc;
  36 eval {
  37     require PVE::LXC;
  38     $have_lxc = 1;
  39 };
  40
  41
  42 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  43
  44 mkdir $pve_fw_status_dir; # make sure this exists
  45
  46 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49
  50 my $max_alias_name_length = 64;
  51 my $max_ipset_name_length = 64;
  52 my $max_group_name_length = 20;
  53
  54 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  55 sub pve_verify_ip_or_cidr {
  56     my ($cidr, $noerr) = @_;
  57
  58     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  59         return $cidr if Net::IP->new($cidr);
  60         return undef if $noerr;
  61         die Net::IP::Error() . "\n";
  62     }
  63     return undef if $noerr;
  64     die "value does not look like a valid IP address or CIDR network\n";
  65 }
  66
  67 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  68 sub pve_verify_ip_or_cidr_or_alias {
  69     my ($cidr, $noerr) = @_;
  70
  71     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  72
  73     return pve_verify_ip_or_cidr($cidr, $noerr);
  74 }
  75
  76 PVE::JSONSchema::register_standard_option('ipset-name', {
  77     description => "IP set name.",
  78     type => 'string',
  79     pattern => $ipset_name_pattern,
  80     minLength => 2,
  81     maxLength => $max_ipset_name_length,
  82 });
  83
  84 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  85     description => "Alias name.",
  86     type => 'string',
  87     pattern => $ip_alias_pattern,
  88     minLength => 2,
  89     maxLength => $max_alias_name_length,
  90 });
  91
  92 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  93     description => "Log level.",
  94     type => 'string',
  95     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  96     optional => 1,
  97 });
  98
  99 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 100     description => "Security Group name.",
 101     type => 'string',
 102     pattern => $security_group_name_pattern,
 103     minLength => 2,
 104     maxLength => $max_group_name_length,
 105 });
 106
 107 my $feature_ipset_nomatch = 0;
 108 eval  {
 109     my (undef, undef, $release) = POSIX::uname();
 110     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 111         my ($major, $minor) = ($1, $2);
 112         $feature_ipset_nomatch = 1 if ($major > 3) ||
 113             ($major == 3 && $minor >= 7);
 114     }
 115
 116 };
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 149     ],
 150     'Trcrt' => [
 151         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 152         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 153     ],
 154  };
 155
 156 # imported/converted from: /usr/share/shorewall/macro.*
 157 my $pve_fw_macros = {
 158     'Amanda' => [
 159         "Amanda Backup",
 160         { action => 'PARAM', proto => 'udp', dport => '10080' },
 161         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 162     ],
 163     'Auth' => [
 164         "Auth (identd) traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '113' },
 166     ],
 167     'BGP' => [
 168         "Border Gateway Protocol traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '179' },
 170     ],
 171     'BitTorrent' => [
 172         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 173         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 174         { action => 'PARAM', proto => 'udp', dport => '6881' },
 175     ],
 176     'BitTorrent32' => [
 177         "BitTorrent traffic for BitTorrent 3.2 and later",
 178         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 179         { action => 'PARAM', proto => 'udp', dport => '6881' },
 180     ],
 181     'Ceph' => [
 182         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 183         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 184         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 185     ],
 186     'CVS' => [
 187         "Concurrent Versions System pserver traffic",
 188         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 189     ],
 190     'Citrix' => [
 191         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 192         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 193         { action => 'PARAM', proto => 'udp', dport => '1604' },
 194         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 195     ],
 196     'DAAP' => [
 197         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 198         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 199         { action => 'PARAM', proto => 'udp', dport => '3689' },
 200     ],
 201     'DCC' => [
 202         "Distributed Checksum Clearinghouse spam filtering mechanism",
 203         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 204     ],
 205     'DHCPfwd' => [
 206         "Forwarded DHCP traffic",
 207         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 208     ],
 209     'DNS' => [
 210         "Domain Name System traffic (upd and tcp)",
 211         { action => 'PARAM', proto => 'udp', dport => '53' },
 212         { action => 'PARAM', proto => 'tcp', dport => '53' },
 213     ],
 214     'Distcc' => [
 215         "Distributed Compiler service",
 216         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 217     ],
 218     'FTP' => [
 219         "File Transfer Protocol",
 220         { action => 'PARAM', proto => 'tcp', dport => '21' },
 221     ],
 222     'Finger' => [
 223         "Finger protocol (RFC 742)",
 224         { action => 'PARAM', proto => 'tcp', dport => '79' },
 225     ],
 226     'GNUnet' => [
 227         "GNUnet secure peer-to-peer networking traffic",
 228         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 229         { action => 'PARAM', proto => 'udp', dport => '2086' },
 230         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 231         { action => 'PARAM', proto => 'udp', dport => '1080' },
 232     ],
 233     'GRE' => [
 234         "Generic Routing Encapsulation tunneling protocol",
 235         { action => 'PARAM', proto => '47' },
 236     ],
 237     'Git' => [
 238         "Git distributed revision control traffic",
 239         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 240     ],
 241     'HKP' => [
 242         "OpenPGP HTTP keyserver protocol traffic",
 243         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 244     ],
 245     'HTTP' => [
 246         "Hypertext Transfer Protocol (WWW)",
 247         { action => 'PARAM', proto => 'tcp', dport => '80' },
 248     ],
 249     'HTTPS' => [
 250         "Hypertext Transfer Protocol (WWW) over SSL",
 251         { action => 'PARAM', proto => 'tcp', dport => '443' },
 252     ],
 253     'ICPV2' => [
 254         "Internet Cache Protocol V2 (Squid) traffic",
 255         { action => 'PARAM', proto => 'udp', dport => '3130' },
 256     ],
 257     'ICQ' => [
 258         "AOL Instant Messenger traffic",
 259         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 260     ],
 261     'IMAP' => [
 262         "Internet Message Access Protocol",
 263         { action => 'PARAM', proto => 'tcp', dport => '143' },
 264     ],
 265     'IMAPS' => [
 266         "Internet Message Access Protocol over SSL",
 267         { action => 'PARAM', proto => 'tcp', dport => '993' },
 268     ],
 269     'IPIP' => [
 270         "IPIP capsulation traffic",
 271         { action => 'PARAM', proto => '94' },
 272     ],
 273     'IPsec' => [
 274         "IPsec traffic",
 275         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 276         { action => 'PARAM', proto => '50' },
 277     ],
 278     'IPsecah' => [
 279         "IPsec authentication (AH) traffic",
 280         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 281         { action => 'PARAM', proto => '51' },
 282     ],
 283     'IPsecnat' => [
 284         "IPsec traffic and Nat-Traversal",
 285         { action => 'PARAM', proto => 'udp', dport => '500' },
 286         { action => 'PARAM', proto => 'udp', dport => '4500' },
 287         { action => 'PARAM', proto => '50' },
 288     ],
 289     'IRC' => [
 290         "Internet Relay Chat traffic",
 291         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 292     ],
 293     'Jetdirect' => [
 294         "HP Jetdirect printing",
 295         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 296     ],
 297     'L2TP' => [
 298         "Layer 2 Tunneling Protocol traffic",
 299         { action => 'PARAM', proto => 'udp', dport => '1701' },
 300     ],
 301     'LDAP' => [
 302         "Lightweight Directory Access Protocol traffic",
 303         { action => 'PARAM', proto => 'tcp', dport => '389' },
 304     ],
 305     'LDAPS' => [
 306         "Secure Lightweight Directory Access Protocol traffic",
 307         { action => 'PARAM', proto => 'tcp', dport => '636' },
 308     ],
 309     'MSNP' => [
 310         "Microsoft Notification Protocol",
 311         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 312     ],
 313     'MSSQL' => [
 314         "Microsoft SQL Server",
 315         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 316     ],
 317     'Mail' => [
 318         "Mail traffic (SMTP, SMTPS, Submission)",
 319         { action => 'PARAM', proto => 'tcp', dport => '25' },
 320         { action => 'PARAM', proto => 'tcp', dport => '465' },
 321         { action => 'PARAM', proto => 'tcp', dport => '587' },
 322     ],
 323     'Munin' => [
 324         "Munin networked resource monitoring traffic",
 325         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 326     ],
 327     'MySQL' => [
 328         "MySQL server",
 329         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 330     ],
 331     'NNTP' => [
 332         "NNTP traffic (Usenet).",
 333         { action => 'PARAM', proto => 'tcp', dport => '119' },
 334     ],
 335     'NNTPS' => [
 336         "Encrypted NNTP traffic (Usenet)",
 337         { action => 'PARAM', proto => 'tcp', dport => '563' },
 338     ],
 339     'NTP' => [
 340         "Network Time Protocol (ntpd)",
 341         { action => 'PARAM', proto => 'udp', dport => '123' },
 342     ],
 343     'OSPF' => [
 344         "OSPF multicast traffic",
 345         { action => 'PARAM', proto => '89' },
 346     ],
 347     'OpenVPN' => [
 348         "OpenVPN traffic",
 349         { action => 'PARAM', proto => 'udp', dport => '1194' },
 350     ],
 351     'PCA' => [
 352         "Symantec PCAnywere (tm)",
 353         { action => 'PARAM', proto => 'udp', dport => '5632' },
 354         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 355     ],
 356     'POP3' => [
 357         "POP3 traffic",
 358         { action => 'PARAM', proto => 'tcp', dport => '110' },
 359     ],
 360     'POP3S' => [
 361         "Encrypted POP3 traffic",
 362         { action => 'PARAM', proto => 'tcp', dport => '995' },
 363     ],
 364     'PPtP' => [
 365         "Point-to-Point Tunneling Protocol",
 366         { action => 'PARAM', proto => '47' },
 367         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 368     ],
 369     'Ping' => [
 370         "ICMP echo request",
 371         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 372     ],
 373     'PostgreSQL' => [
 374         "PostgreSQL server",
 375         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 376     ],
 377     'Printer' => [
 378         "Line Printer protocol printing",
 379         { action => 'PARAM', proto => 'tcp', dport => '515' },
 380     ],
 381     'RDP' => [
 382         "Microsoft Remote Desktop Protocol traffic",
 383         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 384     ],
 385     'RIP' => [
 386         "Routing Information Protocol (bidirectional)",
 387         { action => 'PARAM', proto => 'udp', dport => '520' },
 388     ],
 389     'RNDC' => [
 390         "BIND remote management protocol",
 391         { action => 'PARAM', proto => 'tcp', dport => '953' },
 392     ],
 393     'Razor' => [
 394         "Razor Antispam System",
 395         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 396     ],
 397     'Rdate' => [
 398         "Remote time retrieval (rdate)",
 399         { action => 'PARAM', proto => 'tcp', dport => '37' },
 400     ],
 401     'Rsync' => [
 402         "Rsync server",
 403         { action => 'PARAM', proto => 'tcp', dport => '873' },
 404     ],
 405     'SANE' => [
 406         "SANE network scanning",
 407         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 408     ],
 409     'SMB' => [
 410         "Microsoft SMB traffic",
 411         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 412         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 413         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 414         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 415     ],
 416     'SMBswat' => [
 417         "Samba Web Administration Tool",
 418         { action => 'PARAM', proto => 'tcp', dport => '901' },
 419     ],
 420     'SMTP' => [
 421         "Simple Mail Transfer Protocol",
 422         { action => 'PARAM', proto => 'tcp', dport => '25' },
 423     ],
 424     'SMTPS' => [
 425         "Encrypted Simple Mail Transfer Protocol",
 426         { action => 'PARAM', proto => 'tcp', dport => '465' },
 427     ],
 428     'SNMP' => [
 429         "Simple Network Management Protocol",
 430         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 431         { action => 'PARAM', proto => 'tcp', dport => '161' },
 432     ],
 433     'SPAMD' => [
 434         "Spam Assassin SPAMD traffic",
 435         { action => 'PARAM', proto => 'tcp', dport => '783' },
 436     ],
 437     'SSH' => [
 438         "Secure shell traffic",
 439         { action => 'PARAM', proto => 'tcp', dport => '22' },
 440     ],
 441     'SVN' => [
 442         "Subversion server (svnserve)",
 443         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 444     ],
 445     'SixXS' => [
 446         "SixXS IPv6 Deployment and Tunnel Broker",
 447         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 448         { action => 'PARAM', proto => 'udp', dport => '3740' },
 449         { action => 'PARAM', proto => '41' },
 450         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 451     ],
 452     'Squid' => [
 453         "Squid web proxy traffic",
 454         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 455     ],
 456     'Submission' => [
 457         "Mail message submission traffic",
 458         { action => 'PARAM', proto => 'tcp', dport => '587' },
 459     ],
 460     'Syslog' => [
 461         "Syslog protocol (RFC 5424) traffic",
 462         { action => 'PARAM', proto => 'udp', dport => '514' },
 463         { action => 'PARAM', proto => 'tcp', dport => '514' },
 464     ],
 465     'TFTP' => [
 466         "Trivial File Transfer Protocol traffic",
 467         { action => 'PARAM', proto => 'udp', dport => '69' },
 468     ],
 469     'Telnet' => [
 470         "Telnet traffic",
 471         { action => 'PARAM', proto => 'tcp', dport => '23' },
 472     ],
 473     'Telnets' => [
 474         "Telnet over SSL",
 475         { action => 'PARAM', proto => 'tcp', dport => '992' },
 476     ],
 477     'Time' => [
 478         "RFC 868 Time protocol",
 479         { action => 'PARAM', proto => 'tcp', dport => '37' },
 480     ],
 481     'Trcrt' => [
 482         "Traceroute (for up to 30 hops) traffic",
 483         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 484         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 485     ],
 486     'VNC' => [
 487         "VNC traffic for VNC display's 0 - 99",
 488         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 489     ],
 490     'VNCL' => [
 491         "VNC traffic from Vncservers to Vncviewers in listen mode",
 492         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 493     ],
 494     'Web' => [
 495         "WWW traffic (HTTP and HTTPS)",
 496         { action => 'PARAM', proto => 'tcp', dport => '80' },
 497         { action => 'PARAM', proto => 'tcp', dport => '443' },
 498     ],
 499     'Webcache' => [
 500         "Web Cache/Proxy traffic (port 8080)",
 501         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 502     ],
 503     'Webmin' => [
 504         "Webmin traffic",
 505         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 506     ],
 507     'Whois' => [
 508         "Whois (nicname, RFC 3912) traffic",
 509         { action => 'PARAM', proto => 'tcp', dport => '43' },
 510     ],
 511 };
 512
 513 my $pve_fw_parsed_macros;
 514 my $pve_fw_macro_descr;
 515 my $pve_fw_macro_ipversion = {};
 516 my $pve_fw_preferred_macro_names = {};
 517
 518 my $pve_std_chains = {};
 519 $pve_std_chains->{4} = {
 520     'PVEFW-SET-ACCEPT-MARK' => [
 521         "-j MARK --set-mark 1",
 522     ],
 523     'PVEFW-DropBroadcast' => [
 524         # same as shorewall 'Broadcast'
 525         # simply DROP BROADCAST/MULTICAST/ANYCAST
 526         # we can use this to reduce logging
 527         { action => 'DROP', dsttype => 'BROADCAST' },
 528         { action => 'DROP', dsttype => 'MULTICAST' },
 529         { action => 'DROP', dsttype => 'ANYCAST' },
 530         { action => 'DROP', dest => '224.0.0.0/4' },
 531     ],
 532     'PVEFW-reject' => [
 533         # same as shorewall 'reject'
 534         { action => 'DROP', dsttype => 'BROADCAST' },
 535         { action => 'DROP', source => '224.0.0.0/4' },
 536         { action => 'DROP', proto => 'icmp' },
 537         "-p tcp -j REJECT --reject-with tcp-reset",
 538         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 539         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 540         "-j REJECT --reject-with icmp-host-prohibited",
 541     ],
 542     'PVEFW-Drop' => [
 543         # same as shorewall 'Drop', which is equal to DROP,
 544         # but REJECT/DROP some packages to reduce logging,
 545         # and ACCEPT critical ICMP types
 546         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 547         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 548         { action => 'PVEFW-DropBroadcast' },
 549         # ACCEPT critical ICMP types
 550         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 551         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 552         # Drop packets with INVALID state
 553         "-m conntrack --ctstate INVALID -j DROP",
 554         # Drop Microsoft SMB noise
 555         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 556         { action => 'DROP', proto => 'udp', dport => '137:139'},
 557         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 558         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 559         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 560         # Drop new/NotSyn traffic so that it doesn't get logged
 561         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 562         # Drop DNS replies
 563         { action => 'DROP', proto => 'udp', sport => 53 },
 564     ],
 565     'PVEFW-Reject' => [
 566         # same as shorewall 'Reject', which is equal to Reject,
 567         # but REJECT/DROP some packages to reduce logging,
 568         # and ACCEPT critical ICMP types
 569         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 570         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 571         { action => 'PVEFW-DropBroadcast' },
 572         # ACCEPT critical ICMP types
 573         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 574         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 575         # Drop packets with INVALID state
 576         "-m conntrack --ctstate INVALID -j DROP",
 577         # Drop Microsoft SMB noise
 578         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 579         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 580         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 581         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 582         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 583         # Drop new/NotSyn traffic so that it doesn't get logged
 584         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 585         # Drop DNS replies
 586         { action => 'DROP', proto => 'udp', sport => 53 },
 587     ],
 588     'PVEFW-tcpflags' => [
 589         # same as shorewall tcpflags action.
 590         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 591         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 592         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 593         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 594         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 595         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 596     ],
 597     'PVEFW-smurfs' => [
 598         # same as shorewall smurfs action
 599         # Filter packets for smurfs (packets with a broadcast address as the source).
 600         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 601         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 602         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 603     ],
 604 };
 605
 606 $pve_std_chains->{6} = {
 607     'PVEFW-SET-ACCEPT-MARK' => [
 608         "-j MARK --set-mark 1",
 609     ],
 610     'PVEFW-DropBroadcast' => [
 611         # same as shorewall 'Broadcast'
 612         # simply DROP BROADCAST/MULTICAST/ANYCAST
 613         # we can use this to reduce logging
 614         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 615         # ipv6 addrtype does not work with kernel 2.6.32
 616         #{ action => 'DROP', dsttype => 'MULTICAST' },
 617         #{ action => 'DROP', dsttype => 'ANYCAST' },
 618         { action => 'DROP', dest => 'ff00::/8' },
 619         #{ action => 'DROP', dest => '224.0.0.0/4' },
 620     ],
 621     'PVEFW-reject' => [
 622         # same as shorewall 'reject'
 623         #{ action => 'DROP', dsttype => 'BROADCAST' },
 624         #{ action => 'DROP', source => '224.0.0.0/4' },
 625         { action => 'DROP', proto => 'icmpv6' },
 626         "-p tcp -j REJECT --reject-with tcp-reset",
 627         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 628         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 629         #"-j REJECT --reject-with icmp-host-prohibited",
 630     ],
 631     'PVEFW-Drop' => [
 632         # same as shorewall 'Drop', which is equal to DROP,
 633         # but REJECT/DROP some packages to reduce logging,
 634         # and ACCEPT critical ICMP types
 635         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 636         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 637         { action => 'PVEFW-DropBroadcast' },
 638         # ACCEPT critical ICMP types
 639         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 640         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 641         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 642
 643         # Drop packets with INVALID state
 644         "-m conntrack --ctstate INVALID -j DROP",
 645         # Drop Microsoft SMB noise
 646         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 647         { action => 'DROP', proto => 'udp', dport => '137:139'},
 648         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 649         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 650         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 651         # Drop new/NotSyn traffic so that it doesn't get logged
 652         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 653         # Drop DNS replies
 654         { action => 'DROP', proto => 'udp', sport => 53 },
 655     ],
 656     'PVEFW-Reject' => [
 657         # same as shorewall 'Reject', which is equal to Reject,
 658         # but REJECT/DROP some packages to reduce logging,
 659         # and ACCEPT critical ICMP types
 660         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 661         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 662         { action => 'PVEFW-DropBroadcast' },
 663         # ACCEPT critical ICMP types
 664         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 665         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 666         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 667
 668         # Drop packets with INVALID state
 669         "-m conntrack --ctstate INVALID -j DROP",
 670         # Drop Microsoft SMB noise
 671         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 672         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 673         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 674         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 675         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 676         # Drop new/NotSyn traffic so that it doesn't get logged
 677         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 678         # Drop DNS replies
 679         { action => 'DROP', proto => 'udp', sport => 53 },
 680     ],
 681     'PVEFW-tcpflags' => [
 682         # same as shorewall tcpflags action.
 683         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 684         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 685         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 686         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 687         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 688         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 689     ],
 690 };
 691
 692 # iptables -p icmp -h
 693 my $icmp_type_names = {
 694     any => 1,
 695     'echo-reply' => 1,
 696     'destination-unreachable' => 1,
 697     'network-unreachable' => 1,
 698     'host-unreachable' => 1,
 699     'protocol-unreachable' => 1,
 700     'port-unreachable' => 1,
 701     'fragmentation-needed' => 1,
 702     'source-route-failed' => 1,
 703     'network-unknown' => 1,
 704     'host-unknown' => 1,
 705     'network-prohibited' => 1,
 706     'host-prohibited' => 1,
 707     'TOS-network-unreachable' => 1,
 708     'TOS-host-unreachable' => 1,
 709     'communication-prohibited' => 1,
 710     'host-precedence-violation' => 1,
 711     'precedence-cutoff' => 1,
 712     'source-quench' => 1,
 713     'redirect' => 1,
 714     'network-redirect' => 1,
 715     'host-redirect' => 1,
 716     'TOS-network-redirect' => 1,
 717     'TOS-host-redirect' => 1,
 718     'echo-request' => 1,
 719     'router-advertisement' => 1,
 720     'router-solicitation' => 1,
 721     'time-exceeded' => 1,
 722     'ttl-zero-during-transit' => 1,
 723     'ttl-zero-during-reassembly' => 1,
 724     'parameter-problem' => 1,
 725     'ip-header-bad' => 1,
 726     'required-option-missing' => 1,
 727     'timestamp-request' => 1,
 728     'timestamp-reply' => 1,
 729     'address-mask-request' => 1,
 730     'address-mask-reply' => 1,
 731 };
 732
 733 # ip6tables -p icmpv6 -h
 734
 735 my $icmpv6_type_names = {
 736     'any' => 1,
 737     'destination-unreachable' => 1,
 738     'no-route' => 1,
 739     'communication-prohibited' => 1,
 740     'address-unreachable' => 1,
 741     'port-unreachable' => 1,
 742     'packet-too-big' => 1,
 743     'time-exceeded' => 1,
 744     'ttl-zero-during-transit' => 1,
 745     'ttl-zero-during-reassembly' => 1,
 746     'parameter-problem' => 1,
 747     'bad-header' => 1,
 748     'unknown-header-type' => 1,
 749     'unknown-option' => 1,
 750     'echo-request' => 1,
 751     'echo-reply' => 1,
 752     'router-solicitation' => 1,
 753     'router-advertisement' => 1,
 754     'neighbor-solicitation' => 1,
 755     'neighbour-solicitation' => 1,
 756     'neighbor-advertisement' => 1,
 757     'neighbour-advertisement' => 1,
 758     'redirect' => 1,
 759 };
 760
 761 sub init_firewall_macros {
 762
 763     $pve_fw_parsed_macros = {};
 764
 765     my $parse = sub {
 766         my ($k, $macro) = @_;
 767         my $lc_name = lc($k);
 768         $pve_fw_macro_ipversion->{$k} = 0;
 769         while (!ref($macro->[0])) {
 770             my $desc = shift @$macro;
 771             if ($desc eq 'ipv4only') {
 772                 $pve_fw_macro_ipversion->{$k} = 4;
 773             } elsif ($desc eq 'ipv6only') {
 774                 $pve_fw_macro_ipversion->{$k} = 6;
 775             } else {
 776                 $pve_fw_macro_descr->{$k} = $desc;
 777             }
 778         }
 779         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 780         $pve_fw_parsed_macros->{$k} = $macro;
 781     };
 782
 783     foreach my $k (keys %$pve_fw_macros) {
 784         &$parse($k, $pve_fw_macros->{$k});
 785     }
 786
 787     foreach my $k (keys %$pve_ipv6fw_macros) {
 788         next if $pve_fw_parsed_macros->{$k};
 789         &$parse($k, $pve_ipv6fw_macros->{$k});
 790         $pve_fw_macro_ipversion->{$k} = 6;
 791     }
 792 }
 793
 794 init_firewall_macros();
 795
 796 sub get_macros {
 797     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 798 }
 799
 800 my $etc_services;
 801
 802 sub get_etc_services {
 803
 804     return $etc_services if $etc_services;
 805
 806     my $filename = "/etc/services";
 807
 808     my $fh = IO::File->new($filename, O_RDONLY);
 809     if (!$fh) {
 810         warn "unable to read '$filename' - $!\n";
 811         return {};
 812     }
 813
 814     my $services = {};
 815
 816     while (my $line = <$fh>) {
 817         chomp ($line);
 818         next if $line =~m/^#/;
 819         next if ($line =~m/^\s*$/);
 820
 821         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 822             $services->{byid}->{$2}->{name} = $1;
 823             $services->{byid}->{$2}->{port} = $2;
 824             $services->{byid}->{$2}->{$3} = 1;
 825             $services->{byname}->{$1} = $services->{byid}->{$2};
 826         }
 827     }
 828
 829     close($fh);
 830
 831     $etc_services = $services;
 832
 833
 834     return $etc_services;
 835 }
 836
 837 my $etc_protocols;
 838
 839 sub get_etc_protocols {
 840     return $etc_protocols if $etc_protocols;
 841
 842     my $filename = "/etc/protocols";
 843
 844     my $fh = IO::File->new($filename, O_RDONLY);
 845     if (!$fh) {
 846         warn "unable to read '$filename' - $!\n";
 847         return {};
 848     }
 849
 850     my $protocols = {};
 851
 852     while (my $line = <$fh>) {
 853         chomp ($line);
 854         next if $line =~m/^#/;
 855         next if ($line =~m/^\s*$/);
 856
 857         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 858             $protocols->{byid}->{$2}->{name} = $1;
 859             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 860         }
 861     }
 862
 863     close($fh);
 864
 865     # add special case for ICMP v6
 866     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 867     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 868
 869     $etc_protocols = $protocols;
 870
 871     return $etc_protocols;
 872 }
 873
 874 my $ipv4_mask_hash_localnet = {
 875     '255.255.0.0' => 16,
 876     '255.255.128.0' => 17,
 877     '255.255.192.0' => 18,
 878     '255.255.224.0' => 19,
 879     '255.255.240.0' => 20,
 880     '255.255.248.0' => 21,
 881     '255.255.252.0' => 22,
 882     '255.255.254.0' => 23,
 883     '255.255.255.0' => 24,
 884     '255.255.255.128' => 25,
 885     '255.255.255.192' => 26,
 886     '255.255.255.224' => 27,
 887     '255.255.255.240' => 28,
 888     '255.255.255.248' => 29,
 889     '255.255.255.252' => 30,
 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             } else {
 916                 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 917                 next if !defined($mask);
 918             }
 919             my $cidr = "$entry->{dest}/$mask";
 920             my $testnet = Net::IP->new($cidr);
 921             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 922                 $__local_network = $cidr;
 923                 return;
 924             }
 925         }
 926     };
 927     warn $@ if $@;
 928
 929     return $__local_network;
 930 }
 931
 932 # ipset names are limited to 31 characters,
 933 # and we use '-v4' or '-v6' to indicate IP versions,
 934 # and we use '_swap' suffix for atomic update,
 935 # for example PVEFW-${VMID}-${ipset_name}_swap
 936
 937 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 938
 939 sub compute_ipset_chain_name {
 940     my ($vmid, $ipset_name, $ipversion) = @_;
 941
 942     $vmid = 0 if !defined($vmid);
 943
 944     my $id = "$vmid-${ipset_name}-v$ipversion";
 945
 946     if (length($id) > $max_iptables_ipset_name_length) {
 947         $id = PVE::Tools::fnv31a_hex($id);
 948     }
 949
 950     return "PVEFW-$id";
 951 }
 952
 953 sub compute_ipfilter_ipset_name {
 954     my ($iface) = @_;
 955
 956     return "ipfilter-$iface";
 957 }
 958
 959 sub parse_address_list {
 960     my ($str) = @_;
 961
 962     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 963         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 964         return;
 965     }
 966
 967     if ($str =~ m/^${ip_alias_pattern}$/) {
 968         die "alias name too long\n" if length($str) > $max_alias_name_length;
 969         return;
 970     }
 971
 972     my $count = 0;
 973     my $iprange = 0;
 974     my $ipversion;
 975
 976     foreach my $elem (split(/,/, $str)) {
 977         $count++;
 978         my $ip = Net::IP->new($elem);
 979         if (!$ip) {
 980             my $err = Net::IP::Error();
 981             die "invalid IP address: $err\n";
 982         }
 983         $iprange = 1 if $elem =~ m/-/;
 984
 985         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 986
 987         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 988             if $ipversion && ($new_ipversion != $ipversion);
 989
 990         $ipversion = $new_ipversion;
 991     }
 992
 993     die "you can't use a range in a list\n" if $iprange && $count > 1;
 994
 995     return $ipversion;
 996 }
 997
 998 sub parse_port_name_number_or_range {
 999     my ($str, $dport) = @_;
1000
1001     my $services = PVE::Firewall::get_etc_services();
1002     my $count = 0;
1003     my $icmp_port = 0;
1004
1005     foreach my $item (split(/,/, $str)) {
1006         $count++;
1007         if ($item =~ m/^(\d+):(\d+)$/) {
1008             my ($port1, $port2) = ($1, $2);
1009             die "invalid port '$port1'\n" if $port1 > 65535;
1010             die "invalid port '$port2'\n" if $port2 > 65535;
1011         } elsif ($item =~ m/^(\d+)$/) {
1012             my $port = $1;
1013             die "invalid port '$port'\n" if $port > 65535;
1014         } else {
1015             if ($dport && $icmp_type_names->{$item}) {
1016                 $icmp_port = 1;
1017             } elsif ($dport && $icmpv6_type_names->{$item}) {
1018                 $icmp_port = 1;
1019             } else {
1020                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1021             }
1022         }
1023     }
1024
1025     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1026
1027     return $count;
1028 }
1029
1030 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1031 sub pve_fw_verify_sport_spec {
1032    my ($portstr) = @_;
1033
1034    parse_port_name_number_or_range($portstr, 0);
1035
1036    return $portstr;
1037 }
1038
1039 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1040 sub pve_fw_verify_dport_spec {
1041    my ($portstr) = @_;
1042
1043    parse_port_name_number_or_range($portstr, 1);
1044
1045    return $portstr;
1046 }
1047
1048 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1049 sub pve_fw_verify_addr_spec {
1050    my ($list) = @_;
1051
1052    parse_address_list($list);
1053
1054    return $list;
1055 }
1056
1057 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1058 sub pve_fw_verify_protocol_spec {
1059    my ($proto) = @_;
1060
1061    my $protocols = get_etc_protocols();
1062
1063    die "unknown protocol '$proto'\n" if $proto &&
1064        !(defined($protocols->{byname}->{$proto}) ||
1065          defined($protocols->{byid}->{$proto}));
1066
1067    return $proto;
1068 }
1069
1070
1071 # helper function for API
1072
1073 sub copy_opject_with_digest {
1074     my ($object) = @_;
1075
1076     my $sha = Digest::SHA->new('sha1');
1077
1078     my $res = {};
1079     foreach my $k (sort keys %$object) {
1080         my $v = $object->{$k};
1081         next if !defined($v);
1082         $res->{$k} = $v;
1083         $sha->add($k, ':', $v, "\n");
1084     }
1085
1086     my $digest = $sha->hexdigest;
1087
1088     $res->{digest} = $digest;
1089
1090     return wantarray ? ($res, $digest) : $res;
1091 }
1092
1093 sub copy_list_with_digest {
1094     my ($list) = @_;
1095
1096     my $sha = Digest::SHA->new('sha1');
1097
1098     my $res = [];
1099     foreach my $entry (@$list) {
1100         my $data = {};
1101         foreach my $k (sort keys %$entry) {
1102             my $v = $entry->{$k};
1103             next if !defined($v);
1104             $data->{$k} = $v;
1105             # Note: digest ignores refs ($rule->{errors})
1106             # since Digest::SHA expects a series of bytes,
1107             #  we have to encode the value here to prevent errors when
1108             #  using utf8 characters (eg. in comments)
1109             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1110         }
1111         push @$res, $data;
1112     }
1113
1114     my $digest = $sha->hexdigest;
1115
1116     foreach my $entry (@$res) {
1117         $entry->{digest} = $digest;
1118     }
1119
1120     return wantarray ? ($res, $digest) : $res;
1121 }
1122
1123
1124 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.";
1125
1126 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.";
1127
1128 my $rule_properties = {
1129     pos => {
1130         description => "Update rule at position <pos>.",
1131         type => 'integer',
1132         minimum => 0,
1133         optional => 1,
1134     },
1135     digest => get_standard_option('pve-config-digest'),
1136     type => {
1137         type => 'string',
1138         optional => 1,
1139         enum => ['in', 'out', 'group'],
1140     },
1141     action => {
1142         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1143         type => 'string',
1144         optional => 1,
1145         pattern => $security_group_name_pattern,
1146         maxLength => 20,
1147         minLength => 2,
1148     },
1149     macro => {
1150         type => 'string',
1151         optional => 1,
1152         maxLength => 128,
1153     },
1154     iface => get_standard_option('pve-iface', {
1155         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.",
1156         optional => 1
1157     }),
1158     source => {
1159         description => "Restrict packet source address. $addr_list_descr",
1160         type => 'string', format => 'pve-fw-addr-spec',
1161         optional => 1,
1162     },
1163     dest => {
1164         description => "Restrict packet destination address. $addr_list_descr",
1165         type => 'string', format => 'pve-fw-addr-spec',
1166         optional => 1,
1167     },
1168     proto => {
1169         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1170         type => 'string', format => 'pve-fw-protocol-spec',
1171         optional => 1,
1172     },
1173     enable => {
1174         type => 'integer',
1175         minimum => 0,
1176         optional => 1,
1177     },
1178     sport => {
1179         description => "Restrict TCP/UDP source port. $port_descr",
1180         type => 'string', format => 'pve-fw-sport-spec',
1181         optional => 1,
1182     },
1183     dport => {
1184         description => "Restrict TCP/UDP destination port. $port_descr",
1185         type => 'string', format => 'pve-fw-dport-spec',
1186         optional => 1,
1187     },
1188     comment => {
1189         type => 'string',
1190         optional => 1,
1191     },
1192 };
1193
1194 sub add_rule_properties {
1195     my ($properties) = @_;
1196
1197     foreach my $k (keys %$rule_properties) {
1198         my $h = $rule_properties->{$k};
1199         # copy data, so that we can modify later without side effects
1200         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1201     }
1202
1203     return $properties;
1204 }
1205
1206 sub delete_rule_properties {
1207     my ($rule, $delete_str) = @_;
1208
1209     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1210         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1211             if !defined($rule_properties->{$opt});
1212         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1213             if $opt eq 'type' || $opt eq 'action';
1214         delete $rule->{$opt};
1215     }
1216
1217     return $rule;
1218 }
1219
1220 my $apply_macro = sub {
1221     my ($macro_name, $param, $verify, $ipversion) = @_;
1222
1223     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1224     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1225
1226     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1227         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1228     }
1229
1230     # skip macros which are specific to another ipversion
1231     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1232         return if $ipversion != $required;
1233     }
1234
1235     my $rules = [];
1236
1237     foreach my $templ (@$macro_rules) {
1238         my $rule = {};
1239         my $param_used = {};
1240         foreach my $k (keys %$templ) {
1241             my $v = $templ->{$k};
1242             if ($v eq 'PARAM') {
1243                 $v = $param->{$k};
1244                 $param_used->{$k} = 1;
1245             } elsif ($v eq 'DEST') {
1246                 $v = $param->{dest};
1247                 $param_used->{dest} = 1;
1248             } elsif ($v eq 'SOURCE') {
1249                 $v = $param->{source};
1250                 $param_used->{source} = 1;
1251             }
1252
1253             if (!defined($v)) {
1254                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1255                 raise_param_exc({ macro => $msg }) if $verify;
1256                 die "$msg\n";
1257             }
1258             $rule->{$k} = $v;
1259         }
1260         foreach my $k (keys %$param) {
1261             next if $k eq 'macro';
1262             next if !defined($param->{$k});
1263             next if $param_used->{$k};
1264             if (defined($rule->{$k})) {
1265                 if ($rule->{$k} ne $param->{$k}) {
1266                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1267                     raise_param_exc({ $k => $msg }) if $verify;
1268                     die "$msg\n";
1269                 }
1270             } else {
1271                 $rule->{$k} = $param->{$k};
1272             }
1273         }
1274         push @$rules, $rule;
1275     }
1276
1277     return $rules;
1278 };
1279
1280 my $rule_env_iface_lookup = {
1281     'ct' => 1,
1282     'vm' => 1,
1283     'group' => 0,
1284     'cluster' => 1,
1285     'host' => 1,
1286 };
1287
1288 sub verify_rule {
1289     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1290
1291     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1292
1293     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1294     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1295
1296     my $errors = $rule->{errors} || {};
1297
1298     my $error_count = 0;
1299
1300     my $add_error = sub {
1301         my ($param, $msg)  = @_;
1302         chomp $msg;
1303         raise_param_exc({ $param => $msg }) if !$noerr;
1304         $error_count++;
1305         $errors->{$param} = $msg if !$errors->{$param};
1306     };
1307
1308     my $ipversion;
1309     my $set_ip_version = sub {
1310         my $vers = shift;
1311         if ($vers) {
1312             die "detected mixed ipv4/ipv6 adresses in rule\n"
1313                 if $ipversion && ($vers != $ipversion);
1314             $ipversion = $vers;
1315         }
1316     };
1317
1318     my $check_ipset_or_alias_property = sub {
1319         my ($name, $expected_ipversion) = @_;
1320
1321         if (my $value = $rule->{$name}) {
1322             if ($value =~ m/^\+/) {
1323                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1324                     &$add_error($name, "no such ipset '$1'")
1325                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1326
1327                 } else {
1328                     &$add_error($name, "invalid ipset name '$value'");
1329                 }
1330             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1331                 my $alias = lc($value);
1332                 &$add_error($name, "no such alias '$value'")
1333                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1334                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1335                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1336
1337                 &$set_ip_version($e->{ipversion});
1338             }
1339         }
1340     };
1341
1342     my $type = $rule->{type};
1343     my $action = $rule->{action};
1344
1345     &$add_error('type', "missing property") if !$type;
1346     &$add_error('action', "missing property") if !$action;
1347
1348     if ($type) {
1349         if ($type eq  'in' || $type eq 'out') {
1350             &$add_error('action', "unknown action '$action'")
1351                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1352         } elsif ($type eq 'group') {
1353             &$add_error('type', "security groups not allowed")
1354                 if !$allow_groups;
1355             &$add_error('action', "invalid characters in security group name")
1356                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1357         } else {
1358             &$add_error('type', "unknown rule type '$type'");
1359         }
1360     }
1361
1362     if ($rule->{iface}) {
1363         &$add_error('type', "parameter -i not allowed for this rule type")
1364             if !$allow_iface;
1365         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1366         &$add_error('iface', $@) if $@;
1367         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1368             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1369                 if $rule->{iface} !~  m/^net(\d+)$/;
1370         }
1371     }
1372
1373     if ($rule->{macro}) {
1374         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1375             $rule->{macro} = $preferred_name;
1376         } else {
1377             &$add_error('macro', "unknown macro '$rule->{macro}'");
1378         }
1379     }
1380
1381     if ($rule->{proto}) {
1382         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1383         &$add_error('proto', $@) if $@;
1384         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1385         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1386     }
1387
1388     if ($rule->{dport}) {
1389         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1390         &$add_error('dport', $@) if $@;
1391         &$add_error('proto', "missing property - 'dport' requires this property")
1392             if !$rule->{proto};
1393     }
1394
1395     if ($rule->{sport}) {
1396         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1397         &$add_error('sport', $@) if $@;
1398         &$add_error('proto', "missing property - 'sport' requires this property")
1399             if !$rule->{proto};
1400     }
1401
1402     if ($rule->{source}) {
1403         eval {
1404             my $source_ipversion = parse_address_list($rule->{source});
1405             &$set_ip_version($source_ipversion);
1406         };
1407         &$add_error('source', $@) if $@;
1408         &$check_ipset_or_alias_property('source', $ipversion);
1409     }
1410
1411     if ($rule->{dest}) {
1412         eval {
1413             my $dest_ipversion = parse_address_list($rule->{dest});
1414             &$set_ip_version($dest_ipversion);
1415         };
1416         &$add_error('dest', $@) if $@;
1417         &$check_ipset_or_alias_property('dest', $ipversion);
1418     }
1419
1420     $rule->{ipversion} = $ipversion if $ipversion;
1421
1422     if ($rule->{macro} && !$error_count) {
1423         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1424         if (my $err = $@) {
1425             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1426                 my $eh = $err->{errors};
1427                 foreach my $p (keys %$eh) {
1428                     &$add_error($p, $eh->{$p});
1429                 }
1430             } else {
1431                 &$add_error('macro', "$err");
1432             }
1433         }
1434     }
1435
1436     $rule->{errors} = $errors if $error_count;
1437
1438     return $rule;
1439 }
1440
1441 sub copy_rule_data {
1442     my ($rule, $param) = @_;
1443
1444     foreach my $k (keys %$rule_properties) {
1445         if (defined(my $v = $param->{$k})) {
1446             if ($v eq '' || $v eq '-') {
1447                 delete $rule->{$k};
1448             } else {
1449                 $rule->{$k} = $v;
1450             }
1451         }
1452     }
1453
1454     return $rule;
1455 }
1456
1457 sub rules_modify_permissions {
1458     my ($rule_env) = @_;
1459
1460     if ($rule_env eq 'host') {
1461         return {
1462             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1463         };
1464     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1465         return {
1466             check => ['perm', '/', [ 'Sys.Modify' ]],
1467         };
1468     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1469         return {
1470             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1471         }
1472     }
1473
1474     return undef;
1475 }
1476
1477 sub rules_audit_permissions {
1478     my ($rule_env) = @_;
1479
1480     if ($rule_env eq 'host') {
1481         return {
1482             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1483         };
1484     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1485         return {
1486             check => ['perm', '/', [ 'Sys.Audit' ]],
1487         };
1488     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1489         return {
1490             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1491         }
1492     }
1493
1494     return undef;
1495 }
1496
1497 # core functions
1498 my $bridge_firewall_enabled = 0;
1499
1500 sub enable_bridge_firewall {
1501
1502     return if $bridge_firewall_enabled; # only once
1503
1504     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1505     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1506
1507     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1508     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1509
1510     $bridge_firewall_enabled = 1;
1511 }
1512
1513 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1514
1515 sub iptables_restore_cmdlist {
1516     my ($cmdlist) = @_;
1517
1518     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1519 }
1520
1521 sub ip6tables_restore_cmdlist {
1522     my ($cmdlist) = @_;
1523
1524     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1525 }
1526
1527 sub ipset_restore_cmdlist {
1528     my ($cmdlist) = @_;
1529
1530     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1531 }
1532
1533 sub iptables_get_chains {
1534     my ($iptablescmd) = @_;
1535
1536     $iptablescmd = "iptables" if !$iptablescmd;
1537
1538     my $res = {};
1539
1540     # check what chains we want to track
1541     my $is_pvefw_chain = sub {
1542         my $name = shift;
1543
1544         return 1 if $name =~ m/^PVEFW-\S+$/;
1545
1546         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1547
1548         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1549
1550         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1551         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1552
1553         return undef;
1554     };
1555
1556     my $table = '';
1557
1558     my $hooks = {};
1559
1560     my $parser = sub {
1561         my $line = shift;
1562
1563         return if $line =~ m/^#/;
1564         return if $line =~ m/^\s*$/;
1565
1566         if ($line =~ m/^\*(\S+)$/) {
1567             $table = $1;
1568             return;
1569         }
1570
1571         return if $table ne 'filter';
1572
1573         if ($line =~ m/^:(\S+)\s/) {
1574             my $chain = $1;
1575             return if !&$is_pvefw_chain($chain);
1576             $res->{$chain} = "unknown";
1577         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1578             my ($chain, $sig) = ($1, $2);
1579             return if !&$is_pvefw_chain($chain);
1580             $res->{$chain} = $sig;
1581         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1582             $hooks->{$1} = 1;
1583         } else {
1584             # simply ignore the rest
1585             return;
1586         }
1587     };
1588
1589     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1590
1591     return wantarray ? ($res, $hooks) : $res;
1592 }
1593
1594 sub iptables_chain_digest {
1595     my ($rules) = @_;
1596     my $digest = Digest::SHA->new('sha1');
1597     foreach my $rule (@$rules) { # order is important
1598         $digest->add($rule);
1599     }
1600     return $digest->b64digest;
1601 }
1602
1603 sub ipset_chain_digest {
1604     my ($rules) = @_;
1605
1606     my $digest = Digest::SHA->new('sha1');
1607     foreach my $rule (sort @$rules) { # note: sorted
1608         $digest->add($rule);
1609     }
1610     return $digest->b64digest;
1611 }
1612
1613 sub ipset_get_chains {
1614
1615     my $res = {};
1616     my $chains = {};
1617
1618     my $parser = sub {
1619         my $line = shift;
1620
1621         return if $line =~ m/^#/;
1622         return if $line =~ m/^\s*$/;
1623         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1624             my $chain = $1;
1625             $line =~ s/\s+$//; # delete trailing white space
1626             push @{$chains->{$chain}}, $line;
1627         } else {
1628             # simply ignore the rest
1629             return;
1630         }
1631     };
1632
1633     run_command("/sbin/ipset save", outfunc => $parser);
1634
1635     # compute digest for each chain
1636     foreach my $chain (keys %$chains) {
1637         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1638     }
1639
1640     return $res;
1641 }
1642
1643 sub ruleset_generate_cmdstr {
1644     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1645
1646     return if defined($rule->{enable}) && !$rule->{enable};
1647     return if $rule->{errors};
1648
1649     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1650
1651     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1652     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1653
1654     my @cmd = ();
1655
1656     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1657     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1658
1659     my $source = $rule->{source};
1660     my $dest = $rule->{dest};
1661
1662     if ($source) {
1663         if ($source =~ m/^\+/) {
1664             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1665                 my $name = $1;
1666                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1667                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1668                     push @cmd, "-m set --match-set ${ipset_chain} src";
1669                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1670                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1671                     push @cmd, "-m set --match-set ${ipset_chain} src";
1672                 } else {
1673                     die "no such ipset '$name'\n";
1674                 }
1675             } else {
1676                 die "invalid security group name '$source'\n";
1677             }
1678         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1679             my $alias = lc($source);
1680             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1681             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1682             die "no such alias '$source'\n" if !$e;
1683             push @cmd, "-s $e->{cidr}";
1684         } elsif ($source =~ m/\-/){
1685             push @cmd, "-m iprange --src-range $source";
1686         } else {
1687             push @cmd, "-s $source";
1688         }
1689     }
1690
1691     if ($dest) {
1692         if ($dest =~ m/^\+/) {
1693             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1694                 my $name = $1;
1695                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1696                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1697                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1698                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1699                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1700                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1701                 } else {
1702                     die "no such ipset '$name'\n";
1703                 }
1704             } else {
1705                 die "invalid security group name '$dest'\n";
1706             }
1707         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1708             my $alias = lc($dest);
1709             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1710             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1711             die "no such alias '$dest'\n" if !$e;
1712             push @cmd, "-d $e->{cidr}";
1713         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1714             push @cmd, "-m iprange --dst-range $dest";
1715         } else {
1716             push @cmd, "-d $dest";
1717         }
1718     }
1719
1720     if ($rule->{proto}) {
1721         push @cmd, "-p $rule->{proto}";
1722
1723         my $multiport = 0;
1724         $multiport++ if $nbdport > 1;
1725         $multiport++ if $nbsport > 1;
1726
1727         push @cmd, "--match multiport" if $multiport;
1728
1729         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1730             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1731
1732         if ($rule->{dport}) {
1733             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1734                 # Note: we use dport to store --icmp-type
1735                 die "unknown icmp-type '$rule->{dport}'\n"
1736                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1737                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1738             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1739                 # Note: we use dport to store --icmpv6-type
1740                 die "unknown icmpv6-type '$rule->{dport}'\n"
1741                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1742                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1743             } else {
1744                 if ($nbdport > 1) {
1745                     if ($multiport == 2) {
1746                         push @cmd,  "--ports $rule->{dport}";
1747                     } else {
1748                         push @cmd, "--dports $rule->{dport}";
1749                     }
1750                 } else {
1751                     push @cmd, "--dport $rule->{dport}";
1752                 }
1753             }
1754         }
1755
1756         if ($rule->{sport}) {
1757             if ($nbsport > 1) {
1758                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1759             } else {
1760                 push @cmd, "--sport $rule->{sport}";
1761             }
1762         }
1763     } elsif ($rule->{dport} || $rule->{sport}) {
1764         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1765         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1766     }
1767
1768     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1769
1770     if (my $action = $rule->{action}) {
1771         $action = $actions->{$action} if defined($actions->{$action});
1772         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1773         push @cmd, $goto ? "-g $action" : "-j $action";
1774     }
1775
1776     return scalar(@cmd) ? join(' ', @cmd) : undef;
1777 }
1778
1779 sub ruleset_generate_rule {
1780     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1781
1782     my $rules;
1783
1784     if ($rule->{macro}) {
1785         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1786     } else {
1787         $rules = [ $rule ];
1788     }
1789
1790     # update all or nothing
1791
1792     my @cmds = ();
1793     foreach my $tmp (@$rules) {
1794         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1795             push @cmds, $cmdstr;
1796         }
1797     }
1798
1799     foreach my $cmdstr (@cmds) {
1800         ruleset_addrule($ruleset, $chain, $cmdstr);
1801     }
1802 }
1803
1804 sub ruleset_generate_rule_insert {
1805     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1806
1807     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1808
1809     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1810         ruleset_insertrule($ruleset, $chain, $cmdstr);
1811     }
1812 }
1813
1814 sub ruleset_create_chain {
1815     my ($ruleset, $chain) = @_;
1816
1817     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1818     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1819
1820     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1821
1822     $ruleset->{$chain} = [];
1823 }
1824
1825 sub ruleset_chain_exist {
1826     my ($ruleset, $chain) = @_;
1827
1828     return $ruleset->{$chain} ? 1 : undef;
1829 }
1830
1831 sub ruleset_addrule {
1832    my ($ruleset, $chain, $rule) = @_;
1833
1834    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1835
1836    push @{$ruleset->{$chain}}, "-A $chain $rule";
1837 }
1838
1839 sub ruleset_insertrule {
1840    my ($ruleset, $chain, $rule) = @_;
1841
1842    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1843
1844    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1845 }
1846
1847 sub get_log_rule_base {
1848     my ($chain, $vmid, $msg, $loglevel) = @_;
1849
1850     die "internal error - no log level" if !defined($loglevel);
1851
1852     $vmid = 0 if !defined($vmid);
1853
1854     # Note: we use special format for prefix to pass further
1855     # info to log daemon (VMID, LOGVELEL and CHAIN)
1856
1857     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1858 }
1859
1860 sub ruleset_addlog {
1861     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1862
1863     return if !defined($loglevel);
1864
1865     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1866
1867     $logrule = "$rule $logrule" if defined($rule);
1868
1869     ruleset_addrule($ruleset, $chain, $logrule);
1870 }
1871
1872 sub ruleset_add_chain_policy {
1873     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1874
1875     if ($policy eq 'ACCEPT') {
1876
1877         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1878                               { ACCEPT =>  $accept_action});
1879
1880     } elsif ($policy eq 'DROP') {
1881
1882         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1883
1884         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1885
1886         ruleset_addrule($ruleset, $chain, "-j DROP");
1887     } elsif ($policy eq 'REJECT') {
1888         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1889
1890         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1891
1892         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1893     } else {
1894         # should not happen
1895         die "internal error: unknown policy '$policy'";
1896     }
1897 }
1898
1899 sub ruleset_chain_add_ndp {
1900     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
1901     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1902
1903     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
1904     if ($direction ne 'OUT' || $options->{radv}) {
1905         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
1906     }
1907     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
1908     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
1909 }
1910
1911 sub ruleset_chain_add_conn_filters {
1912     my ($ruleset, $chain, $accept) = @_;
1913
1914     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1915     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1916 }
1917
1918 sub ruleset_chain_add_input_filters {
1919     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1920
1921     if ($cluster_conf->{ipset}->{blacklist}){
1922         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1923             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1924             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1925             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1926         }
1927         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1928         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1929     }
1930
1931     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1932         if ($ipversion == 4) {
1933             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1934         }
1935     }
1936
1937     if ($options->{tcpflags}) {
1938         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1939     }
1940 }
1941
1942 sub ruleset_create_vm_chain {
1943     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1944
1945     ruleset_create_chain($ruleset, $chain);
1946     my $accept = generate_nfqueue($options);
1947
1948     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1949         if ($ipversion == 4) {
1950             if ($direction eq 'OUT') {
1951                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1952                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1953                                         proto => 'udp', sport => 68, dport => 67 });
1954             } else {
1955                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1956                                       { action => 'ACCEPT',
1957                                         proto => 'udp', sport => 67, dport => 68 });
1958             }
1959         } elsif ($ipversion == 6) {
1960             if ($direction eq 'OUT') {
1961                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1962                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1963                                         proto => 'udp', sport => 546, dport => 547 });
1964             } else {
1965                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1966                                       { action => 'ACCEPT',
1967                                         proto => 'udp', sport => 547, dport => 546 });
1968             }
1969         }
1970
1971     }
1972
1973     if ($direction eq 'OUT') {
1974         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1975             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1976         }
1977         if ($ipversion == 6 && !$options->{radv}) {
1978             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1979         }
1980         if ($ipfilter_ipset) {
1981             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1982         }
1983         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1984     }
1985
1986     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
1987     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
1988 }
1989
1990 sub ruleset_add_group_rule {
1991     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1992
1993     my $group = $rule->{action};
1994     my $group_chain = "GROUP-$group-$direction";
1995     if(!ruleset_chain_exist($ruleset, $group_chain)){
1996         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1997     }
1998
1999     if ($direction eq 'OUT' && $rule->{iface_out}) {
2000         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2001     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2002         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2003     } else {
2004         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2005     }
2006
2007     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
2008 }
2009
2010 sub ruleset_generate_vm_rules {
2011     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2012
2013     my $lc_direction = lc($direction);
2014
2015     my $in_accept = generate_nfqueue($options);
2016
2017     foreach my $rule (@$rules) {
2018         next if $rule->{iface} && $rule->{iface} ne $netid;
2019         next if !$rule->{enable} || $rule->{errors};
2020         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2021
2022         if ($rule->{type} eq 'group') {
2023             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2024                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2025         } else {
2026             next if $rule->{type} ne $lc_direction;
2027             eval {
2028                 if ($direction eq 'OUT') {
2029                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2030                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2031                                           undef, $cluster_conf, $vmfw_conf);
2032                 } else {
2033                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2034                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2035                                           undef, $cluster_conf, $vmfw_conf);
2036                 }
2037             };
2038             warn $@ if $@;
2039         }
2040     }
2041 }
2042
2043 sub generate_nfqueue {
2044     my ($options) = @_;
2045
2046     if ($options->{ips}) {
2047         my $action = "NFQUEUE";
2048         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2049             if (defined($3) && defined($1)) {
2050                 $action .= " --queue-balance $1:$3";
2051             } elsif (defined($1)) {
2052                 $action .= " --queue-num $1";
2053             }
2054         }
2055         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2056         return $action;
2057     } else {
2058         return "ACCEPT";
2059     }
2060 }
2061
2062 sub ruleset_generate_vm_ipsrules {
2063     my ($ruleset, $options, $direction, $iface) = @_;
2064
2065     if ($options->{ips} && $direction eq 'IN') {
2066         my $nfqueue = generate_nfqueue($options);
2067
2068         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2069             ruleset_create_chain($ruleset, "PVEFW-IPS");
2070         }
2071
2072         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2073     }
2074 }
2075
2076 sub generate_tap_rules_direction {
2077     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2078
2079     my $lc_direction = lc($direction);
2080
2081     my $rules = $vmfw_conf->{rules};
2082
2083     my $options = $vmfw_conf->{options};
2084     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2085
2086     my $tapchain = "$iface-$direction";
2087
2088     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2089     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2090         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2091
2092     # create chain with mac and ip filter
2093     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2094
2095     if ($options->{enable}) {
2096         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2097
2098         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2099
2100         # implement policy
2101         my $policy;
2102
2103         if ($direction eq 'OUT') {
2104             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2105         } else {
2106         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2107         }
2108
2109         my $accept = generate_nfqueue($options);
2110         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2111         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2112     } else {
2113         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2114         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2115     }
2116
2117     # plug the tap chain to bridge chain
2118     if ($direction eq 'IN') {
2119         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2120                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2121     } else {
2122         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2123                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2124     }
2125 }
2126
2127 sub enable_host_firewall {
2128     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2129
2130     my $options = $hostfw_conf->{options};
2131     my $cluster_options = $cluster_conf->{options};
2132     my $rules = $hostfw_conf->{rules};
2133     my $cluster_rules = $cluster_conf->{rules};
2134
2135     # host inbound firewall
2136     my $chain = "PVEFW-HOST-IN";
2137     ruleset_create_chain($ruleset, $chain);
2138
2139     my $loglevel = get_option_log_level($options, "log_level_in");
2140
2141     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2142
2143     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2144     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2145     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2146
2147     # we use RETURN because we need to check also tap rules
2148     my $accept_action = 'RETURN';
2149
2150     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2151
2152     # add host rules first, so that cluster wide rules can be overwritten
2153     foreach my $rule (@$rules, @$cluster_rules) {
2154         next if !$rule->{enable} || $rule->{errors};
2155         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2156
2157         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2158
2159         eval {
2160             if ($rule->{type} eq 'group') {
2161                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2162             } elsif ($rule->{type} eq 'in') {
2163                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2164                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2165                                       undef, $cluster_conf, $hostfw_conf);
2166             }
2167         };
2168         warn $@ if $@;
2169         delete $rule->{iface_in};
2170     }
2171
2172     # allow standard traffic for management ipset (includes cluster network)
2173     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2174     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2175     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2176     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2177     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2178     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2179
2180     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2181     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2182
2183     # corosync
2184     if ($localnet && ($ipversion == $localnet_ver)) {
2185         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2186         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2187         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2188     }
2189
2190     # implement input policy
2191     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2192     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2193
2194     # host outbound firewall
2195     $chain = "PVEFW-HOST-OUT";
2196     ruleset_create_chain($ruleset, $chain);
2197
2198     $loglevel = get_option_log_level($options, "log_level_out");
2199
2200     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2201
2202     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2203
2204     # we use RETURN because we may want to check other thigs later
2205     $accept_action = 'RETURN';
2206     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2207
2208     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2209
2210     # add host rules first, so that cluster wide rules can be overwritten
2211     foreach my $rule (@$rules, @$cluster_rules) {
2212         next if !$rule->{enable} || $rule->{errors};
2213         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2214
2215         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2216         eval {
2217             if ($rule->{type} eq 'group') {
2218                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2219             } elsif ($rule->{type} eq 'out') {
2220                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2221                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2222                                       undef, $cluster_conf, $hostfw_conf);
2223             }
2224         };
2225         warn $@ if $@;
2226         delete $rule->{iface_out};
2227     }
2228
2229     # allow standard traffic on cluster network
2230     if ($localnet && ($ipversion == $localnet_ver)) {
2231         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2232         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2233         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2234         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2235
2236         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2237         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2238         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2239     }
2240
2241     # implement output policy
2242     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2243     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2244
2245     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2246     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2247 }
2248
2249 sub generate_group_rules {
2250     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2251
2252     my $rules = $cluster_conf->{groups}->{$group};
2253
2254     if (!$rules) {
2255         warn "no such security group '$group'\n";
2256         $rules = []; # create empty chain
2257     }
2258
2259     my $chain = "GROUP-${group}-IN";
2260
2261     ruleset_create_chain($ruleset, $chain);
2262     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2263
2264     foreach my $rule (@$rules) {
2265         next if $rule->{type} ne 'in';
2266         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2267         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2268                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2269                               undef, $cluster_conf);
2270     }
2271
2272     $chain = "GROUP-${group}-OUT";
2273
2274     ruleset_create_chain($ruleset, $chain);
2275     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2276
2277     foreach my $rule (@$rules) {
2278         next if $rule->{type} ne 'out';
2279         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2280         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2281         # check also other tap rules later
2282         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2283                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2284                               undef, $cluster_conf);
2285     }
2286 }
2287
2288 my $MAX_NETS = 32;
2289 my $valid_netdev_names = {};
2290 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2291     $valid_netdev_names->{"net$i"} = 1;
2292 }
2293
2294 sub parse_fw_rule {
2295     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2296
2297     my $orig_line = $line;
2298
2299     my $rule = {};
2300
2301     # we can add single line comments to the end of the rule
2302     if ($line =~ s/#\s*(.*?)\s*$//) {
2303         $rule->{comment} = decode('utf8', $1);
2304     }
2305
2306     # we can disable a rule when prefixed with '|'
2307
2308     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2309
2310     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2311         die "unable to parse rule: $line\n";
2312
2313     $rule->{type} = lc($1);
2314     $rule->{action} = $2;
2315
2316     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2317         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2318             $rule->{macro} = $1;
2319             $rule->{action} = $2;
2320         }
2321     }
2322
2323     while (length($line)) {
2324         if ($line =~ s/^-i (\S+)\s*//) {
2325             $rule->{iface} = $1;
2326             next;
2327         }
2328
2329         last if $rule->{type} eq 'group';
2330
2331         if ($line =~ s/^-p (\S+)\s*//) {
2332             $rule->{proto} = $1;
2333             next;
2334         }
2335
2336         if ($line =~ s/^-dport (\S+)\s*//) {
2337             $rule->{dport} = $1;
2338             next;
2339         }
2340
2341         if ($line =~ s/^-sport (\S+)\s*//) {
2342             $rule->{sport} = $1;
2343             next;
2344         }
2345         if ($line =~ s/^-source (\S+)\s*//) {
2346             $rule->{source} = $1;
2347             next;
2348         }
2349         if ($line =~ s/^-dest (\S+)\s*//) {
2350             $rule->{dest} = $1;
2351             next;
2352         }
2353
2354         last;
2355     }
2356
2357     die "unable to parse rule parameters: $line\n" if length($line);
2358
2359     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2360     if ($verbose && $rule->{errors}) {
2361         warn "$prefix - errors in rule parameters: $orig_line\n";
2362         foreach my $p (keys %{$rule->{errors}}) {
2363             warn "  $p: $rule->{errors}->{$p}\n";
2364         }
2365     }
2366
2367     return $rule;
2368 }
2369
2370 sub parse_vmfw_option {
2371     my ($line) = @_;
2372
2373     my ($opt, $value);
2374
2375     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2376
2377     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2378         $opt = lc($1);
2379         $value = int($2);
2380     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2381         $opt = lc($1);
2382         $value = $2 ? lc($3) : '';
2383     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2384         $opt = lc($1);
2385         $value = uc($3);
2386     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2387         $opt = lc($1);
2388         $value = $2;
2389     } else {
2390         die "can't parse option '$line'\n"
2391     }
2392
2393     return ($opt, $value);
2394 }
2395
2396 sub parse_hostfw_option {
2397     my ($line) = @_;
2398
2399     my ($opt, $value);
2400
2401     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2402
2403     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2404         $opt = lc($1);
2405         $value = int($2);
2406     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2407         $opt = lc($1);
2408         $value = $2 ? lc($3) : '';
2409     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2410         $opt = lc($1);
2411         $value = int($2);
2412     } else {
2413         die "can't parse option '$line'\n"
2414     }
2415
2416     return ($opt, $value);
2417 }
2418
2419 sub parse_clusterfw_option {
2420     my ($line) = @_;
2421
2422     my ($opt, $value);
2423
2424     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2425         $opt = lc($1);
2426         $value = int($2);
2427         if (($value > 1) && ((time() - $value) > 60)) {
2428             $value = 0
2429         }
2430     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2431         $opt = lc($1);
2432         $value = uc($3);
2433     } else {
2434         die "can't parse option '$line'\n"
2435     }
2436
2437     return ($opt, $value);
2438 }
2439
2440 sub resolve_alias {
2441     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2442
2443     my $alias = lc($cidr);
2444     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2445     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2446
2447     die "no such alias '$cidr'\n" if !$e;;
2448
2449     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2450 }
2451
2452 sub parse_ip_or_cidr {
2453     my ($cidr) = @_;
2454
2455     my $ipversion;
2456
2457     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2458         $cidr =~ s|/128$||;
2459         $ipversion = 6;
2460     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2461         $cidr =~ s|/32$||;
2462         $ipversion = 4;
2463     } else {
2464         die "value does not look like a valid IP address or CIDR network\n";
2465     }
2466
2467     return wantarray ? ($cidr, $ipversion) : $cidr;
2468 }
2469
2470 sub parse_alias {
2471     my ($line) = @_;
2472
2473     # we can add single line comments to the end of the line
2474     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2475
2476     if ($line =~ m/^(\S+)\s(\S+)$/) {
2477         my ($name, $cidr) = ($1, $2);
2478         my $ipversion;
2479
2480         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2481
2482         my $data = {
2483             name => $name,
2484             cidr => $cidr,
2485             ipversion => $ipversion,
2486         };
2487         $data->{comment} = $comment  if $comment;
2488         return $data;
2489     }
2490
2491     return undef;
2492 }
2493
2494 sub generic_fw_config_parser {
2495     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2496
2497     my $section;
2498     my $group;
2499
2500     my $res = $empty_conf;
2501
2502     while (defined(my $line = <$fh>)) {
2503         next if $line =~ m/^#/;
2504         next if $line =~ m/^\s*$/;
2505
2506         chomp $line;
2507
2508         my $linenr = $fh->input_line_number();
2509         my $prefix = "$filename (line $linenr)";
2510
2511         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2512             $section = 'options';
2513             next;
2514         }
2515
2516         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2517             $section = 'aliases';
2518             next;
2519         }
2520
2521         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2522             $section = 'groups';
2523             $group = lc($1);
2524             my $comment = $2;
2525             eval {
2526                 die "security group name too long\n" if length($group) > $max_group_name_length;
2527                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2528             };
2529             if (my $err = $@) {
2530                 ($section, $group, $comment) = undef;
2531                 warn "$prefix: $err";
2532                 next;
2533             }
2534
2535             $res->{$section}->{$group} = [];
2536             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2537                 if $comment;
2538             next;
2539         }
2540
2541         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2542             $section = 'rules';
2543             next;
2544         }
2545
2546         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2547             $section = 'ipset';
2548             $group = lc($1);
2549             my $comment = $2;
2550             eval {
2551                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2552                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2553             };
2554             if (my $err = $@) {
2555                 ($section, $group, $comment) = undef;
2556                 warn "$prefix: $err";
2557                 next;
2558             }
2559
2560             $res->{$section}->{$group} = [];
2561             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2562                 if $comment;
2563             next;
2564         }
2565
2566         if (!$section) {
2567             warn "$prefix: skip line - no section\n";
2568             next;
2569         }
2570
2571         if ($section eq 'options') {
2572             eval {
2573                 my ($opt, $value);
2574                 if ($rule_env eq 'cluster') {
2575                     ($opt, $value) = parse_clusterfw_option($line);
2576                 } elsif ($rule_env eq 'host') {
2577                     ($opt, $value) = parse_hostfw_option($line);
2578                 } else {
2579                     ($opt, $value) = parse_vmfw_option($line);
2580                 }
2581                 $res->{options}->{$opt} = $value;
2582             };
2583             warn "$prefix: $@" if $@;
2584         } elsif ($section eq 'aliases') {
2585             eval {
2586                 my $data = parse_alias($line);
2587                 $res->{aliases}->{lc($data->{name})} = $data;
2588             };
2589             warn "$prefix: $@" if $@;
2590         } elsif ($section eq 'rules') {
2591             my $rule;
2592             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2593             if (my $err = $@) {
2594                 warn "$prefix: $err";
2595                 next;
2596             }
2597             push @{$res->{$section}}, $rule;
2598         } elsif ($section eq 'groups') {
2599             my $rule;
2600             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2601             if (my $err = $@) {
2602                 warn "$prefix: $err";
2603                 next;
2604             }
2605             push @{$res->{$section}->{$group}}, $rule;
2606         } elsif ($section eq 'ipset') {
2607             # we can add single line comments to the end of the rule
2608             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2609
2610             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2611             my $nomatch = $1;
2612             my $cidr = $2;
2613             my $errors;
2614
2615             if ($nomatch && !$feature_ipset_nomatch) {
2616                 $errors->{nomatch} = "nomatch not supported by kernel";
2617             }
2618
2619             eval {
2620                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2621                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2622                 } else {
2623                     $cidr = parse_ip_or_cidr($cidr);
2624                 }
2625             };
2626             if (my $err = $@) {
2627                 chomp $err;
2628                 $errors->{cidr} = $err;
2629             }
2630
2631             my $entry = { cidr => $cidr };
2632             $entry->{nomatch} = 1 if $nomatch;
2633             $entry->{comment} = $comment if $comment;
2634             $entry->{errors} =  $errors if $errors;
2635
2636             if ($verbose && $errors) {
2637                 warn "$prefix - errors in ipset '$group': $line\n";
2638                 foreach my $p (keys %{$errors}) {
2639                     warn "  $p: $errors->{$p}\n";
2640                 }
2641             }
2642
2643             push @{$res->{$section}->{$group}}, $entry;
2644         } else {
2645             warn "$prefix: skip line - unknown section\n";
2646             next;
2647         }
2648     }
2649
2650     return $res;
2651 }
2652
2653 sub parse_hostfw_config {
2654     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2655
2656     my $empty_conf = { rules => [], options => {}};
2657
2658     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2659 }
2660
2661 sub parse_vmfw_config {
2662     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2663
2664     my $empty_conf = {
2665         rules => [],
2666         options => {},
2667         aliases => {},
2668         ipset => {} ,
2669         ipset_comments => {},
2670     };
2671
2672     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2673 }
2674
2675 sub parse_clusterfw_config {
2676     my ($filename, $fh, $verbose) = @_;
2677
2678     my $section;
2679     my $group;
2680
2681     my $empty_conf = {
2682         rules => [],
2683         options => {},
2684         aliases => {},
2685         groups => {},
2686         group_comments => {},
2687         ipset => {} ,
2688         ipset_comments => {},
2689     };
2690
2691     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2692 }
2693
2694 sub run_locked {
2695     my ($code, @param) = @_;
2696
2697     my $timeout = 10;
2698
2699     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2700
2701     die $@ if $@;
2702
2703     return $res;
2704 }
2705
2706 sub read_local_vm_config {
2707
2708     my $qemu = {};
2709     my $lxc = {};
2710
2711     my $vmdata = { qemu => $qemu, lxc => $lxc };
2712
2713     my $vmlist = PVE::Cluster::get_vmlist();
2714     return $vmdata if !$vmlist || !$vmlist->{ids};
2715     my $ids = $vmlist->{ids};
2716
2717     foreach my $vmid (keys %$ids) {
2718         next if !$vmid; # skip VE0
2719         my $d = $ids->{$vmid};
2720         next if !$d->{node} || $d->{node} ne $nodename;
2721         next if !$d->{type};
2722         if ($d->{type} eq 'qemu') {
2723             if ($have_qemu_server) {
2724                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2725                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2726                     $qemu->{$vmid} = $conf;
2727                 }
2728             }
2729         } elsif ($d->{type} eq 'lxc') {
2730             if ($have_lxc) {
2731                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2732                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2733                     $lxc->{$vmid} = $conf;
2734                 }
2735             }
2736         }
2737     }
2738
2739     return $vmdata;
2740 };
2741
2742 sub load_vmfw_conf {
2743     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2744
2745     my $vmfw_conf = {};
2746
2747     $dir = $pvefw_conf_dir if !defined($dir);
2748
2749     my $filename = "$dir/$vmid.fw";
2750     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2751         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2752         $vmfw_conf->{vmid} = $vmid;
2753     }
2754
2755     return $vmfw_conf;
2756 }
2757
2758 my $format_rules = sub {
2759     my ($rules, $allow_iface) = @_;
2760
2761     my $raw = '';
2762
2763     foreach my $rule (@$rules) {
2764         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2765             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2766             $raw .= uc($rule->{type});
2767             if ($rule->{macro}) {
2768                 $raw .= " $rule->{macro}($rule->{action})";
2769             } else {
2770                 $raw .= " " . $rule->{action};
2771             }
2772             if ($allow_iface && $rule->{iface}) {
2773                 $raw .= " -i $rule->{iface}";
2774             }
2775
2776             if ($rule->{type} ne  'group')  {
2777                 $raw .= " -source $rule->{source}" if $rule->{source};
2778                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2779                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2780                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2781                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2782             }
2783
2784             $raw .= " # " . encode('utf8', $rule->{comment})
2785                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2786             $raw .= "\n";
2787         } else {
2788             die "unknown rule type '$rule->{type}'";
2789         }
2790     }
2791
2792     return $raw;
2793 };
2794
2795 my $format_options = sub {
2796     my ($options) = @_;
2797
2798     my $raw = '';
2799
2800     $raw .= "[OPTIONS]\n\n";
2801     foreach my $opt (keys %$options) {
2802         $raw .= "$opt: $options->{$opt}\n";
2803     }
2804     $raw .= "\n";
2805
2806     return $raw;
2807 };
2808
2809 my $format_aliases = sub {
2810     my ($aliases) = @_;
2811
2812     my $raw = '';
2813
2814     $raw .= "[ALIASES]\n\n";
2815     foreach my $k (keys %$aliases) {
2816         my $e = $aliases->{$k};
2817         $raw .= "$e->{name} $e->{cidr}";
2818         $raw .= " # " . encode('utf8', $e->{comment})
2819             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2820         $raw .= "\n";
2821     }
2822     $raw .= "\n";
2823
2824     return $raw;
2825 };
2826
2827 my $format_ipsets = sub {
2828     my ($fw_conf) = @_;
2829
2830     my $raw = '';
2831
2832     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2833         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2834             my $utf8comment = encode('utf8', $comment);
2835             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2836         } else {
2837             $raw .= "[IPSET $ipset]\n\n";
2838         }
2839         my $options = $fw_conf->{ipset}->{$ipset};
2840
2841         my $nethash = {};
2842         foreach my $entry (@$options) {
2843             $nethash->{$entry->{cidr}} = $entry;
2844         }
2845
2846         foreach my $cidr (sort keys %$nethash) {
2847             my $entry = $nethash->{$cidr};
2848             my $line = $entry->{nomatch} ? '!' : '';
2849             $line .= $entry->{cidr};
2850             $line .= " # " . encode('utf8', $entry->{comment})
2851                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2852             $raw .= "$line\n";
2853         }
2854
2855         $raw .= "\n";
2856     }
2857
2858     return $raw;
2859 };
2860
2861 sub save_vmfw_conf {
2862     my ($vmid, $vmfw_conf) = @_;
2863
2864     my $raw = '';
2865
2866     my $options = $vmfw_conf->{options};
2867     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2868
2869     my $aliases = $vmfw_conf->{aliases};
2870     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2871
2872     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2873
2874     my $rules = $vmfw_conf->{rules} || [];
2875     if ($rules && scalar(@$rules)) {
2876         $raw .= "[RULES]\n\n";
2877         $raw .= &$format_rules($rules, 1);
2878         $raw .= "\n";
2879     }
2880
2881     my $filename = "$pvefw_conf_dir/$vmid.fw";
2882     if ($raw) {
2883         mkdir $pvefw_conf_dir;
2884         PVE::Tools::file_set_contents($filename, $raw);
2885     } else {
2886         unlink $filename;
2887     }
2888 }
2889
2890 sub remove_vmfw_conf {
2891     my ($vmid) = @_;
2892
2893     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
2894
2895     unlink $vmfw_conffile;
2896 }
2897
2898 sub clone_vmfw_conf {
2899     my ($vmid, $newid) = @_;
2900
2901     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
2902     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
2903
2904     if (-f $clonevm_conffile) {
2905         unlink $clonevm_conffile;
2906     }
2907     if (-f $sourcevm_conffile) {
2908         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
2909         PVE::Tools::file_set_contents($clonevm_conffile, $data);
2910     }
2911 }
2912
2913 sub read_vm_firewall_configs {
2914     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2915
2916     my $vmfw_configs = {};
2917
2918     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2919         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2920         next if !$vmfw_conf->{options}; # skip if file does not exists
2921         $vmfw_configs->{$vmid} = $vmfw_conf;
2922     }
2923     foreach my $vmid (keys %{$vmdata->{lxc}}) {
2924         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2925         next if !$vmfw_conf->{options}; # skip if file does not exists
2926         $vmfw_configs->{$vmid} = $vmfw_conf;
2927     }
2928
2929     return $vmfw_configs;
2930 }
2931
2932 sub get_option_log_level {
2933     my ($options, $k) = @_;
2934
2935     my $v = $options->{$k};
2936     $v = $default_log_level if !defined($v);
2937
2938     return undef if $v eq '' || $v eq 'nolog';
2939
2940     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2941
2942     return $v if ($v >= 0) && ($v <= 7);
2943
2944     warn "unknown log level ($k = '$v')\n";
2945
2946     return undef;
2947 }
2948
2949 sub generate_std_chains {
2950     my ($ruleset, $options, $ipversion) = @_;
2951
2952     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2953
2954     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2955
2956     my $chain;
2957
2958     if ($ipversion == 4) {
2959         # same as shorewall smurflog.
2960         $chain = 'PVEFW-smurflog';
2961         $std_chains->{$chain} = [];
2962
2963         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2964         push @{$std_chains->{$chain}}, "-j DROP";
2965     }
2966
2967     # same as shorewall logflags action.
2968     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2969     $chain = 'PVEFW-logflags';
2970     $std_chains->{$chain} = [];
2971
2972     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2973     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2974     push @{$std_chains->{$chain}}, "-j DROP";
2975
2976     foreach my $chain (keys %$std_chains) {
2977         ruleset_create_chain($ruleset, $chain);
2978         foreach my $rule (@{$std_chains->{$chain}}) {
2979             if (ref($rule)) {
2980                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2981             } else {
2982                 ruleset_addrule($ruleset, $chain, $rule);
2983             }
2984         }
2985     }
2986 }
2987
2988 sub generate_ipset_chains {
2989     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
2990
2991     foreach my $ipset (keys %{$ipsets}) {
2992
2993         my $options = $ipsets->{$ipset};
2994
2995         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
2996             if (my $ips = $device_ips->{$1}) {
2997                 $options = [@$options, @$ips];
2998             }
2999         }
3000
3001         # remove duplicates
3002         my $nethash = {};
3003         foreach my $entry (@$options) {
3004             next if $entry->{errors}; # skip entries with errors
3005             eval {
3006                 my ($cidr, $ver);
3007                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3008                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3009                 } else {
3010                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3011                 }
3012                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3013                 if ($ver == 6) {
3014                     # ip_compress_address takes an address only, no CIDR
3015                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3016                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3017                     $cidr .= $prefix_len if defined($prefix_len);
3018                     $cidr =~ s|/128$||;
3019                 } else {
3020                     $cidr =~ s|/32$||;
3021                 }
3022
3023                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3024             };
3025             warn $@ if $@;
3026         }
3027
3028         foreach my $ipversion (4, 6) {
3029             my $data = $nethash->{$ipversion};
3030
3031             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3032
3033             my $hashsize = scalar(@$options);
3034             if ($hashsize <= 64) {
3035                 $hashsize = 64;
3036             } else {
3037                 $hashsize = round_powerof2($hashsize);
3038             }
3039
3040             my $family = $ipversion == "6" ? "inet6" : "inet";
3041
3042             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3043
3044             foreach my $cidr (sort keys %$data) {
3045                 my $entry = $data->{$cidr};
3046
3047                 my $cmd = "add $name $cidr";
3048                 if ($entry->{nomatch}) {
3049                     if ($feature_ipset_nomatch) {
3050                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3051                     } else {
3052                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3053                     }
3054                 } else {
3055                     push @{$ipset_ruleset->{$name}}, $cmd;
3056                 }
3057             }
3058         }
3059     }
3060 }
3061
3062 sub round_powerof2 {
3063     my ($int) = @_;
3064
3065     $int--;
3066     $int |= $int >> $_ foreach (1,2,4,8,16);
3067     return ++$int;
3068 }
3069
3070 sub load_clusterfw_conf {
3071     my ($filename, $verbose) = @_;
3072
3073     $filename = $clusterfw_conf_filename if !defined($filename);
3074
3075     my $cluster_conf = {};
3076     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3077         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3078     }
3079
3080     return $cluster_conf;
3081 }
3082
3083 sub save_clusterfw_conf {
3084     my ($cluster_conf) = @_;
3085
3086     my $raw = '';
3087
3088     my $options = $cluster_conf->{options};
3089     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3090
3091     my $aliases = $cluster_conf->{aliases};
3092     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3093
3094     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3095
3096     my $rules = $cluster_conf->{rules};
3097     if ($rules && scalar(@$rules)) {
3098         $raw .= "[RULES]\n\n";
3099         $raw .= &$format_rules($rules, 1);
3100         $raw .= "\n";
3101     }
3102
3103     if ($cluster_conf->{groups}) {
3104         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3105             my $rules = $cluster_conf->{groups}->{$group};
3106             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3107                 my $utf8comment = encode('utf8', $comment);
3108                 $raw .= "[group $group] # $utf8comment\n\n";
3109             } else {
3110                 $raw .= "[group $group]\n\n";
3111             }
3112
3113             $raw .= &$format_rules($rules, 0);
3114             $raw .= "\n";
3115         }
3116     }
3117
3118     if ($raw) {
3119         mkdir $pvefw_conf_dir;
3120         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3121     } else {
3122         unlink $clusterfw_conf_filename;
3123     }
3124 }
3125
3126 sub load_hostfw_conf {
3127     my ($cluster_conf, $filename, $verbose) = @_;
3128
3129     $filename = $hostfw_conf_filename if !defined($filename);
3130
3131     my $hostfw_conf = {};
3132     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3133         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3134     }
3135     return $hostfw_conf;
3136 }
3137
3138 sub save_hostfw_conf {
3139     my ($hostfw_conf) = @_;
3140
3141     my $raw = '';
3142
3143     my $options = $hostfw_conf->{options};
3144     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3145
3146     my $rules = $hostfw_conf->{rules};
3147     if ($rules && scalar(@$rules)) {
3148         $raw .= "[RULES]\n\n";
3149         $raw .= &$format_rules($rules, 1);
3150         $raw .= "\n";
3151     }
3152
3153     if ($raw) {
3154         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3155     } else {
3156         unlink $hostfw_conf_filename;
3157     }
3158 }
3159
3160 sub compile {
3161     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3162
3163     my $vmfw_configs;
3164
3165     if ($vmdata) { # test mode
3166         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3167         my $filename = "$testdir/cluster.fw";
3168         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3169
3170         $filename = "$testdir/host.fw";
3171         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3172
3173         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3174     } else { # normal operation
3175         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3176
3177         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3178
3179         $vmdata = read_local_vm_config();
3180         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3181     }
3182
3183     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3184
3185     my $localnet;
3186     if ($cluster_conf->{aliases}->{local_network}) {
3187         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3188     } else {
3189         my $localnet_ver;
3190         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3191
3192         $cluster_conf->{aliases}->{local_network} = {
3193             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3194     }
3195
3196     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3197
3198     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3199     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3200     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3201
3202     return ($ruleset, $ipset_ruleset, $rulesetv6);
3203 }
3204
3205 sub compile_iptables_filter {
3206     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3207
3208     my $ruleset = {};
3209
3210     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3211     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3212
3213     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3214
3215     my $hostfw_options = $hostfw_conf->{options} || {};
3216
3217     # fixme: what log level should we use here?
3218     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3219
3220     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3221
3222     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3223     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3224
3225     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3226
3227     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3228     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3229
3230     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3231
3232     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3233
3234     if ($hostfw_enable) {
3235         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3236         warn $@ if $@; # just to be sure - should not happen
3237     }
3238
3239     # generate firewall rules for QEMU VMs
3240     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3241         eval {
3242             my $conf = $vmdata->{qemu}->{$vmid};
3243             my $vmfw_conf = $vmfw_configs->{$vmid};
3244             return if !$vmfw_conf;
3245
3246             foreach my $netid (keys %$conf) {
3247                 next if $netid !~ m/^net(\d+)$/;
3248                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3249                 next if !$net->{firewall};
3250                 my $iface = "tap${vmid}i$1";
3251
3252                 my $macaddr = $net->{macaddr};
3253                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3254                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3255                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3256                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3257             }
3258         };
3259         warn $@ if $@; # just to be sure - should not happen
3260     }
3261
3262     # generate firewall rules for LXC containers
3263     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3264         eval {
3265             my $conf = $vmdata->{lxc}->{$vmid};
3266             my $vmfw_conf = $vmfw_configs->{$vmid};
3267             return if !$vmfw_conf;
3268
3269             if ($vmfw_conf->{options}->{enable}) {
3270                 foreach my $netid (keys %$conf) {
3271                     next if $netid !~ m/^net(\d+)$/;
3272                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3273                     next if !$net->{firewall};
3274                     my $iface = "veth${vmid}i$1";
3275                     my $macaddr = $net->{hwaddr};
3276                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3277                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3278                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3279                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3280                 }
3281             }
3282         };
3283         warn $@ if $@; # just to be sure - should not happen
3284     }
3285
3286     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3287         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3288     }
3289
3290     return $ruleset;
3291 }
3292
3293 sub mac_to_linklocal {
3294     my ($macaddr) = @_;
3295     my @parts = split(/:/, $macaddr);
3296     # The standard link local address uses the fe80::/64 prefix with the
3297     # modified EUI-64 identifier derived from the MAC address by flipping the
3298     # universal/local bit and inserting FF:FE in the middle.
3299     # See RFC 4291.
3300     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3301     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3302     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3303 }
3304
3305 sub compile_ipsets {
3306     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3307
3308     my $localnet;
3309     if ($cluster_conf->{aliases}->{local_network}) {
3310         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3311     } else {
3312         my $localnet_ver;
3313         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3314
3315         $cluster_conf->{aliases}->{local_network} = {
3316             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3317     }
3318
3319     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3320
3321
3322     my $ipset_ruleset = {};
3323
3324     # generate ipsets for QEMU VMs
3325     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3326         eval {
3327             my $conf = $vmdata->{qemu}->{$vmid};
3328             my $vmfw_conf = $vmfw_configs->{$vmid};
3329             return if !$vmfw_conf;
3330
3331             # When the 'ipfilter' option is enabled every device for which there
3332             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3333             # ipset.
3334             # The reason is that ipfilter ipsets are always filled with standard
3335             # IPv6 link-local filters.
3336             my $ipsets = $vmfw_conf->{ipset};
3337             my $implicit_sets = {};
3338
3339             my $device_ips = {};
3340             foreach my $netid (keys %$conf) {
3341                 next if $netid !~ m/^net(\d+)$/;
3342                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3343                 next if !$net->{firewall};
3344
3345                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3346                     $implicit_sets->{"ipfilter-$netid"} = [];
3347                 }
3348
3349                 my $macaddr = $net->{macaddr};
3350                 my $linklocal = mac_to_linklocal($macaddr);
3351                 $device_ips->{$netid} = [
3352                     { cidr => $linklocal },
3353                     { cidr => 'fe80::/10', nomatch => 1 }
3354                 ];
3355             }
3356
3357             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3358             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3359         };
3360         warn $@ if $@; # just to be sure - should not happen
3361     }
3362
3363     # generate firewall rules for LXC containers
3364     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3365         eval {
3366             my $conf = $vmdata->{lxc}->{$vmid};
3367             my $vmfw_conf = $vmfw_configs->{$vmid};
3368             return if !$vmfw_conf;
3369
3370             # When the 'ipfilter' option is enabled every device for which there
3371             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3372             # ipset.
3373             # The reason is that ipfilter ipsets are always filled with standard
3374             # IPv6 link-local filters, as well as the IP addresses configured
3375             # for the container.
3376             my $ipsets = $vmfw_conf->{ipset};
3377             my $implicit_sets = {};
3378
3379             my $device_ips = {};
3380             foreach my $netid (keys %$conf) {
3381                 next if $netid !~ m/^net(\d+)$/;
3382                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3383                 next if !$net->{firewall};
3384
3385                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3386                     $implicit_sets->{"ipfilter-$netid"} = [];
3387                 }
3388
3389                 my $macaddr = $net->{hwaddr};
3390                 my $linklocal = mac_to_linklocal($macaddr);
3391                 my $set = $device_ips->{$netid} = [
3392                     { cidr => $linklocal },
3393                     { cidr => 'fe80::/10', nomatch => 1 }
3394                 ];
3395                 if ($net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3396                     push @$set, { cidr => $1 };
3397                 }
3398                 if ($net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3399                     push @$set, { cidr => $1 };
3400                 }
3401             }
3402
3403             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3404             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3405         };
3406         warn $@ if $@; # just to be sure - should not happen
3407     }
3408
3409     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3410
3411     return $ipset_ruleset;
3412 }
3413
3414 sub get_ruleset_status {
3415     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3416
3417     my $statushash = {};
3418
3419     foreach my $chain (sort keys %$ruleset) {
3420         my $sig = &$digest_fn($ruleset->{$chain});
3421
3422         $statushash->{$chain}->{sig} = $sig;
3423
3424         my $oldsig = $active_chains->{$chain};
3425         if (!defined($oldsig)) {
3426             $statushash->{$chain}->{action} = 'create';
3427         } else {
3428             if ($oldsig eq $sig) {
3429                 $statushash->{$chain}->{action} = 'exists';
3430             } else {
3431                 $statushash->{$chain}->{action} = 'update';
3432             }
3433         }
3434         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3435         foreach my $cmd (@{$ruleset->{$chain}}) {
3436             print "\t$cmd\n" if $verbose;
3437         }
3438     }
3439
3440     foreach my $chain (sort keys %$active_chains) {
3441         if (!defined($ruleset->{$chain})) {
3442             my $sig = $active_chains->{$chain};
3443             $statushash->{$chain}->{action} = 'delete';
3444             $statushash->{$chain}->{sig} = $sig;
3445             print "delete $chain ($sig)\n" if $verbose;
3446         }
3447     }
3448
3449     return $statushash;
3450 }
3451
3452 sub print_sig_rule {
3453     my ($chain, $sig) = @_;
3454
3455     # We just use this to store a SHA1 checksum used to detect changes
3456     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3457 }
3458
3459 sub get_ruleset_cmdlist {
3460     my ($ruleset, $verbose, $iptablescmd) = @_;
3461
3462     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3463
3464     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3465     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3466
3467     # create missing chains first
3468     foreach my $chain (sort keys %$ruleset) {
3469         my $stat = $statushash->{$chain};
3470         die "internal error" if !$stat;
3471         next if $stat->{action} ne 'create';
3472
3473         $cmdlist .= ":$chain - [0:0]\n";
3474     }
3475
3476     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3477         my $chain = "PVEFW-$h";
3478         if ($ruleset->{$chain} && !$hooks->{$h}) {
3479             $cmdlist .= "-A $h -j $chain\n";
3480         }
3481     }
3482
3483     foreach my $chain (sort keys %$ruleset) {
3484         my $stat = $statushash->{$chain};
3485         die "internal error" if !$stat;
3486
3487         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3488             $cmdlist .= "-F $chain\n";
3489             foreach my $cmd (@{$ruleset->{$chain}}) {
3490                 $cmdlist .= "$cmd\n";
3491             }
3492             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3493         } elsif ($stat->{action} eq 'delete') {
3494             die "internal error"; # this should not happen
3495         } elsif ($stat->{action} eq 'exists') {
3496             # do nothing
3497         } else {
3498             die "internal error - unknown status '$stat->{action}'";
3499         }
3500     }
3501
3502     foreach my $chain (keys %$statushash) {
3503         next if $statushash->{$chain}->{action} ne 'delete';
3504         $cmdlist .= "-F $chain\n";
3505     }
3506     foreach my $chain (keys %$statushash) {
3507         next if $statushash->{$chain}->{action} ne 'delete';
3508         next if $chain eq 'PVEFW-INPUT';
3509         next if $chain eq 'PVEFW-OUTPUT';
3510         next if $chain eq 'PVEFW-FORWARD';
3511         $cmdlist .= "-X $chain\n";
3512     }
3513
3514     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3515
3516     $cmdlist .= "COMMIT\n";
3517
3518     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3519 }
3520
3521 sub get_ipset_cmdlist {
3522     my ($ruleset, $verbose) = @_;
3523
3524     my $cmdlist = "";
3525
3526     my $delete_cmdlist = "";
3527
3528     my $active_chains = ipset_get_chains();
3529     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3530
3531     # remove stale _swap chains
3532     foreach my $chain (keys %$active_chains) {
3533         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3534             $cmdlist .= "destroy $chain\n";
3535         }
3536     }
3537
3538     foreach my $chain (keys %$ruleset) {
3539         my $stat = $statushash->{$chain};
3540         die "internal error" if !$stat;
3541
3542         if ($stat->{action} eq 'create') {
3543             foreach my $cmd (@{$ruleset->{$chain}}) {
3544                 $cmdlist .= "$cmd\n";
3545             }
3546         }
3547     }
3548
3549     foreach my $chain (keys %$ruleset) {
3550         my $stat = $statushash->{$chain};
3551         die "internal error" if !$stat;
3552
3553         if ($stat->{action} eq 'update') {
3554             my $chain_swap = $chain."_swap";
3555
3556             foreach my $cmd (@{$ruleset->{$chain}}) {
3557                 $cmd =~ s/$chain/$chain_swap/;
3558                 $cmdlist .= "$cmd\n";
3559             }
3560             $cmdlist .= "swap $chain_swap $chain\n";
3561             $cmdlist .= "flush $chain_swap\n";
3562             $cmdlist .= "destroy $chain_swap\n";
3563         }
3564     }
3565
3566      # the remove unused chains
3567     foreach my $chain (keys %$statushash) {
3568         next if $statushash->{$chain}->{action} ne 'delete';
3569
3570         $delete_cmdlist .= "flush $chain\n";
3571         $delete_cmdlist .= "destroy $chain\n";
3572     }
3573
3574     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3575
3576     return ($cmdlist, $delete_cmdlist, $changes);
3577 }
3578
3579 sub apply_ruleset {
3580     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3581
3582     enable_bridge_firewall();
3583
3584     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3585         get_ipset_cmdlist($ipset_ruleset, $verbose);
3586
3587     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3588     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3589
3590     if ($verbose) {
3591         if ($ipset_changes) {
3592             print "ipset changes:\n";
3593             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3594             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3595         }
3596
3597         if ($changes) {
3598             print "iptables changes:\n";
3599             print $cmdlist;
3600         }
3601
3602         if ($changesv6) {
3603             print "ip6tables changes:\n";
3604             print $cmdlistv6;
3605         }
3606     }
3607
3608     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3609     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3610
3611     ipset_restore_cmdlist($ipset_create_cmdlist);
3612
3613     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3614     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3615
3616     iptables_restore_cmdlist($cmdlist);
3617
3618     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3619     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3620
3621     ip6tables_restore_cmdlist($cmdlistv6);
3622
3623     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3624     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3625
3626     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3627
3628     # test: re-read status and check if everything is up to date
3629     my $active_chains = iptables_get_chains();
3630     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3631
3632     my $errors;
3633     foreach my $chain (sort keys %$ruleset) {
3634         my $stat = $statushash->{$chain};
3635         if ($stat->{action} ne 'exists') {
3636             warn "unable to update chain '$chain'\n";
3637             $errors = 1;
3638         }
3639     }
3640
3641     my $active_chainsv6 = iptables_get_chains("ip6tables");
3642     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3643
3644     foreach my $chain (sort keys %$rulesetv6) {
3645         my $stat = $statushashv6->{$chain};
3646         if ($stat->{action} ne 'exists') {
3647             warn "unable to update chain '$chain'\n";
3648             $errors = 1;
3649         }
3650     }
3651
3652     die "unable to apply firewall changes\n" if $errors;
3653
3654     update_nf_conntrack_max($hostfw_conf);
3655
3656     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3657
3658 }
3659
3660 sub update_nf_conntrack_max {
3661     my ($hostfw_conf) = @_;
3662
3663     my $max = 65536; # reasonable default
3664
3665     my $options = $hostfw_conf->{options} || {};
3666
3667     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3668         $max = $options->{nf_conntrack_max};
3669         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3670     }
3671
3672     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3673     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3674
3675     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3676
3677     if ($current != $max) {
3678         my $hashsize = int($max/4);
3679         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3680         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3681     }
3682 }
3683
3684 sub update_nf_conntrack_tcp_timeout_established {
3685     my ($hostfw_conf) = @_;
3686
3687     my $options = $hostfw_conf->{options} || {};
3688
3689     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3690
3691     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3692 }
3693
3694 sub remove_pvefw_chains {
3695
3696     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3697     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3698     PVE::Firewall::remove_pvefw_chains_ipset();
3699
3700 }
3701
3702 sub remove_pvefw_chains_iptables {
3703     my ($iptablescmd) = @_;
3704
3705     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3706     my $cmdlist = "*filter\n";
3707
3708     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3709         if ($hooks->{$h}) {
3710             $cmdlist .= "-D $h -j PVEFW-$h\n";
3711         }
3712     }
3713
3714     foreach my $chain (keys %$chash) {
3715         $cmdlist .= "-F $chain\n";
3716     }
3717
3718     foreach my $chain (keys %$chash) {
3719         $cmdlist .= "-X $chain\n";
3720     }
3721     $cmdlist .= "COMMIT\n";
3722
3723     if($iptablescmd eq "ip6tables") {
3724         ip6tables_restore_cmdlist($cmdlist);
3725     } else {
3726         iptables_restore_cmdlist($cmdlist);
3727     }
3728 }
3729
3730 sub remove_pvefw_chains_ipset {
3731
3732     my $ipset_chains = ipset_get_chains();
3733
3734     my $cmdlist = "";
3735
3736     foreach my $chain (keys %$ipset_chains) {
3737         $cmdlist .= "flush $chain\n";
3738         $cmdlist .= "destroy $chain\n";
3739     }
3740
3741     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3742 }
3743
3744 sub init {
3745     my $cluster_conf = load_clusterfw_conf();
3746     my $cluster_options = $cluster_conf->{options};
3747     my $enable = $cluster_options->{enable};
3748
3749     return if !$enable;
3750
3751     # load required modules here
3752 }
3753
3754 sub update {
3755     my $code = sub {
3756
3757         my $cluster_conf = load_clusterfw_conf();
3758         my $cluster_options = $cluster_conf->{options};
3759
3760         if (!$cluster_options->{enable}) {
3761             PVE::Firewall::remove_pvefw_chains();
3762             return;
3763         }
3764
3765         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3766
3767         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3768
3769         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3770     };
3771
3772     run_locked($code);
3773 }
3774
3775 1;