src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use PVE::Network;
  16 use PVE::SafeSyslog;
  17 use File::Basename;
  18 use File::Path;
  19 use IO::File;
  20 use Net::IP;
  21 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  22 use Encode;
  23 use Storable qw(dclone);
  24
  25 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  26 my $pvefw_conf_dir = "/etc/pve/firewall";
  27 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  28
  29 # dynamically include PVE::QemuServer and PVE::LXC
  30 # to avoid dependency problems
  31 my $have_qemu_server;
  32 eval {
  33     require PVE::QemuServer;
  34     require PVE::QemuConfig;
  35     $have_qemu_server = 1;
  36 };
  37
  38 my $have_lxc;
  39 eval {
  40     require PVE::LXC;
  41     $have_lxc = 1;
  42 };
  43
  44
  45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  46
  47 mkdir $pve_fw_status_dir; # make sure this exists
  48
  49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  52
  53 my $max_alias_name_length = 64;
  54 my $max_ipset_name_length = 64;
  55 my $max_group_name_length = 18;
  56
  57 my $PROTOCOLS_WITH_PORTS = {
  58     udp => 1,     17 => 1,
  59     udplite => 1, 136 => 1,
  60     tcp => 1,     6 => 1,
  61     dccp => 1,    33 => 1,
  62     sctp => 1,    132 => 1,
  63 };
  64
  65 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  66 sub pve_verify_ip_or_cidr {
  67     my ($cidr, $noerr) = @_;
  68
  69     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  70         return $cidr if Net::IP->new($cidr);
  71         return undef if $noerr;
  72         die Net::IP::Error() . "\n";
  73     }
  74     return undef if $noerr;
  75     die "value does not look like a valid IP address or CIDR network\n";
  76 }
  77
  78 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  79 sub pve_verify_ip_or_cidr_or_alias {
  80     my ($cidr, $noerr) = @_;
  81
  82     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  83
  84     return pve_verify_ip_or_cidr($cidr, $noerr);
  85 }
  86
  87 PVE::JSONSchema::register_standard_option('ipset-name', {
  88     description => "IP set name.",
  89     type => 'string',
  90     pattern => $ipset_name_pattern,
  91     minLength => 2,
  92     maxLength => $max_ipset_name_length,
  93 });
  94
  95 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  96     description => "Alias name.",
  97     type => 'string',
  98     pattern => $ip_alias_pattern,
  99     minLength => 2,
 100     maxLength => $max_alias_name_length,
 101 });
 102
 103 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 104     description => "Log level.",
 105     type => 'string',
 106     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 107     optional => 1,
 108 });
 109
 110 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 111     description => "Security Group name.",
 112     type => 'string',
 113     pattern => $security_group_name_pattern,
 114     minLength => 2,
 115     maxLength => $max_group_name_length,
 116 });
 117
 118 my $feature_ipset_nomatch = 0;
 119 eval  {
 120     my (undef, undef, $release) = POSIX::uname();
 121     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 122         my ($major, $minor) = ($1, $2);
 123         $feature_ipset_nomatch = 1 if ($major > 3) ||
 124             ($major == 3 && $minor >= 7);
 125     }
 126
 127 };
 128
 129 my $nodename = PVE::INotify::nodename();
 130
 131 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 132
 133 my $default_log_level = 'nolog'; # avoid logs by default
 134
 135 my $log_level_hash = {
 136     debug => 7,
 137     info => 6,
 138     notice => 5,
 139     warning => 4,
 140     err => 3,
 141     crit => 2,
 142     alert => 1,
 143     emerg => 0,
 144 };
 145
 146 # %rule
 147 #
 148 # name => optional
 149 # enable => [0|1]
 150 # action =>
 151 # proto =>
 152 # sport => port[,port[,port]].. or port:port
 153 # dport => port[,port[,port]].. or port:port
 154 # log => optional, loglevel
 155 # logmsg => optional, logmsg - overwrites default
 156 # iface_in => incomin interface
 157 # iface_out => outgoing interface
 158 # match => optional, overwrites generation of match
 159 # target => optional, overwrites action
 160
 161 # we need to overwrite some macros for ipv6
 162 my $pve_ipv6fw_macros = {
 163     'Ping' => [
 164         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 165     ],
 166     'NeighborDiscovery' => [
 167         "IPv6 neighbor solicitation, neighbor and router advertisement",
 168         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 169         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 170         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 171         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 172     ],
 173     'DHCPv6' => [
 174         "DHCPv6 traffic",
 175         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 176     ],
 177     'Trcrt' => [
 178         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 179         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 180     ],
 181  };
 182
 183 # imported/converted from: /usr/share/shorewall/macro.*
 184 my $pve_fw_macros = {
 185     'Amanda' => [
 186         "Amanda Backup",
 187         { action => 'PARAM', proto => 'udp', dport => '10080' },
 188         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 189     ],
 190     'Auth' => [
 191         "Auth (identd) traffic",
 192         { action => 'PARAM', proto => 'tcp', dport => '113' },
 193     ],
 194     'BGP' => [
 195         "Border Gateway Protocol traffic",
 196         { action => 'PARAM', proto => 'tcp', dport => '179' },
 197     ],
 198     'BitTorrent' => [
 199         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 200         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 201         { action => 'PARAM', proto => 'udp', dport => '6881' },
 202     ],
 203     'BitTorrent32' => [
 204         "BitTorrent traffic for BitTorrent 3.2 and later",
 205         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 206         { action => 'PARAM', proto => 'udp', dport => '6881' },
 207     ],
 208     'Ceph' => [
 209         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 210         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 211         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 212     ],
 213     'CVS' => [
 214         "Concurrent Versions System pserver traffic",
 215         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 216     ],
 217     'Citrix' => [
 218         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 219         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 220         { action => 'PARAM', proto => 'udp', dport => '1604' },
 221         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 222     ],
 223     'DAAP' => [
 224         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 225         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 226         { action => 'PARAM', proto => 'udp', dport => '3689' },
 227     ],
 228     'DCC' => [
 229         "Distributed Checksum Clearinghouse spam filtering mechanism",
 230         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 231     ],
 232     'DHCPfwd' => [
 233         "Forwarded DHCP traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 235     ],
 236     'DNS' => [
 237         "Domain Name System traffic (upd and tcp)",
 238         { action => 'PARAM', proto => 'udp', dport => '53' },
 239         { action => 'PARAM', proto => 'tcp', dport => '53' },
 240     ],
 241     'Distcc' => [
 242         "Distributed Compiler service",
 243         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 244     ],
 245     'FTP' => [
 246         "File Transfer Protocol",
 247         { action => 'PARAM', proto => 'tcp', dport => '21' },
 248     ],
 249     'Finger' => [
 250         "Finger protocol (RFC 742)",
 251         { action => 'PARAM', proto => 'tcp', dport => '79' },
 252     ],
 253     'GNUnet' => [
 254         "GNUnet secure peer-to-peer networking traffic",
 255         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 256         { action => 'PARAM', proto => 'udp', dport => '2086' },
 257         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 258         { action => 'PARAM', proto => 'udp', dport => '1080' },
 259     ],
 260     'GRE' => [
 261         "Generic Routing Encapsulation tunneling protocol",
 262         { action => 'PARAM', proto => '47' },
 263     ],
 264     'Git' => [
 265         "Git distributed revision control traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 267     ],
 268     'HKP' => [
 269         "OpenPGP HTTP keyserver protocol traffic",
 270         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 271     ],
 272     'HTTP' => [
 273         "Hypertext Transfer Protocol (WWW)",
 274         { action => 'PARAM', proto => 'tcp', dport => '80' },
 275     ],
 276     'HTTPS' => [
 277         "Hypertext Transfer Protocol (WWW) over SSL",
 278         { action => 'PARAM', proto => 'tcp', dport => '443' },
 279     ],
 280     'ICPV2' => [
 281         "Internet Cache Protocol V2 (Squid) traffic",
 282         { action => 'PARAM', proto => 'udp', dport => '3130' },
 283     ],
 284     'ICQ' => [
 285         "AOL Instant Messenger traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 287     ],
 288     'IMAP' => [
 289         "Internet Message Access Protocol",
 290         { action => 'PARAM', proto => 'tcp', dport => '143' },
 291     ],
 292     'IMAPS' => [
 293         "Internet Message Access Protocol over SSL",
 294         { action => 'PARAM', proto => 'tcp', dport => '993' },
 295     ],
 296     'IPIP' => [
 297         "IPIP capsulation traffic",
 298         { action => 'PARAM', proto => '94' },
 299     ],
 300     'IPsec' => [
 301         "IPsec traffic",
 302         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 303         { action => 'PARAM', proto => '50' },
 304     ],
 305     'IPsecah' => [
 306         "IPsec authentication (AH) traffic",
 307         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 308         { action => 'PARAM', proto => '51' },
 309     ],
 310     'IPsecnat' => [
 311         "IPsec traffic and Nat-Traversal",
 312         { action => 'PARAM', proto => 'udp', dport => '500' },
 313         { action => 'PARAM', proto => 'udp', dport => '4500' },
 314         { action => 'PARAM', proto => '50' },
 315     ],
 316     'IRC' => [
 317         "Internet Relay Chat traffic",
 318         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 319     ],
 320     'Jetdirect' => [
 321         "HP Jetdirect printing",
 322         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 323     ],
 324     'L2TP' => [
 325         "Layer 2 Tunneling Protocol traffic",
 326         { action => 'PARAM', proto => 'udp', dport => '1701' },
 327     ],
 328     'LDAP' => [
 329         "Lightweight Directory Access Protocol traffic",
 330         { action => 'PARAM', proto => 'tcp', dport => '389' },
 331     ],
 332     'LDAPS' => [
 333         "Secure Lightweight Directory Access Protocol traffic",
 334         { action => 'PARAM', proto => 'tcp', dport => '636' },
 335     ],
 336     'MSNP' => [
 337         "Microsoft Notification Protocol",
 338         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 339     ],
 340     'MSSQL' => [
 341         "Microsoft SQL Server",
 342         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 343     ],
 344     'Mail' => [
 345         "Mail traffic (SMTP, SMTPS, Submission)",
 346         { action => 'PARAM', proto => 'tcp', dport => '25' },
 347         { action => 'PARAM', proto => 'tcp', dport => '465' },
 348         { action => 'PARAM', proto => 'tcp', dport => '587' },
 349     ],
 350     'MDNS' => [
 351         "Multicast DNS",
 352         { action => 'PARAM', proto => 'udp', dport => '5353' },
 353     ],
 354     'Munin' => [
 355         "Munin networked resource monitoring traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 357     ],
 358     'MySQL' => [
 359         "MySQL server",
 360         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 361     ],
 362     'NNTP' => [
 363         "NNTP traffic (Usenet).",
 364         { action => 'PARAM', proto => 'tcp', dport => '119' },
 365     ],
 366     'NNTPS' => [
 367         "Encrypted NNTP traffic (Usenet)",
 368         { action => 'PARAM', proto => 'tcp', dport => '563' },
 369     ],
 370     'NTP' => [
 371         "Network Time Protocol (ntpd)",
 372         { action => 'PARAM', proto => 'udp', dport => '123' },
 373     ],
 374     'OSPF' => [
 375         "OSPF multicast traffic",
 376         { action => 'PARAM', proto => '89' },
 377     ],
 378     'OpenVPN' => [
 379         "OpenVPN traffic",
 380         { action => 'PARAM', proto => 'udp', dport => '1194' },
 381     ],
 382     'PCA' => [
 383         "Symantec PCAnywere (tm)",
 384         { action => 'PARAM', proto => 'udp', dport => '5632' },
 385         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 386     ],
 387     'POP3' => [
 388         "POP3 traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '110' },
 390     ],
 391     'POP3S' => [
 392         "Encrypted POP3 traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '995' },
 394     ],
 395     'PPtP' => [
 396         "Point-to-Point Tunneling Protocol",
 397         { action => 'PARAM', proto => '47' },
 398         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 399     ],
 400     'Ping' => [
 401         "ICMP echo request",
 402         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 403     ],
 404     'PostgreSQL' => [
 405         "PostgreSQL server",
 406         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 407     ],
 408     'Printer' => [
 409         "Line Printer protocol printing",
 410         { action => 'PARAM', proto => 'tcp', dport => '515' },
 411     ],
 412     'RDP' => [
 413         "Microsoft Remote Desktop Protocol traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 415     ],
 416     'RIP' => [
 417         "Routing Information Protocol (bidirectional)",
 418         { action => 'PARAM', proto => 'udp', dport => '520' },
 419     ],
 420     'RNDC' => [
 421         "BIND remote management protocol",
 422         { action => 'PARAM', proto => 'tcp', dport => '953' },
 423     ],
 424     'Razor' => [
 425         "Razor Antispam System",
 426         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 427     ],
 428     'Rdate' => [
 429         "Remote time retrieval (rdate)",
 430         { action => 'PARAM', proto => 'tcp', dport => '37' },
 431     ],
 432     'Rsync' => [
 433         "Rsync server",
 434         { action => 'PARAM', proto => 'tcp', dport => '873' },
 435     ],
 436     'SANE' => [
 437         "SANE network scanning",
 438         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 439     ],
 440     'SMB' => [
 441         "Microsoft SMB traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 443         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 444         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 445         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 446     ],
 447     'SMBswat' => [
 448         "Samba Web Administration Tool",
 449         { action => 'PARAM', proto => 'tcp', dport => '901' },
 450     ],
 451     'SMTP' => [
 452         "Simple Mail Transfer Protocol",
 453         { action => 'PARAM', proto => 'tcp', dport => '25' },
 454     ],
 455     'SMTPS' => [
 456         "Encrypted Simple Mail Transfer Protocol",
 457         { action => 'PARAM', proto => 'tcp', dport => '465' },
 458     ],
 459     'SNMP' => [
 460         "Simple Network Management Protocol",
 461         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 462         { action => 'PARAM', proto => 'tcp', dport => '161' },
 463     ],
 464     'SPAMD' => [
 465         "Spam Assassin SPAMD traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '783' },
 467     ],
 468     'SSH' => [
 469         "Secure shell traffic",
 470         { action => 'PARAM', proto => 'tcp', dport => '22' },
 471     ],
 472     'SVN' => [
 473         "Subversion server (svnserve)",
 474         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 475     ],
 476     'SixXS' => [
 477         "SixXS IPv6 Deployment and Tunnel Broker",
 478         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 479         { action => 'PARAM', proto => 'udp', dport => '3740' },
 480         { action => 'PARAM', proto => '41' },
 481         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 482     ],
 483     'Squid' => [
 484         "Squid web proxy traffic",
 485         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 486     ],
 487     'Submission' => [
 488         "Mail message submission traffic",
 489         { action => 'PARAM', proto => 'tcp', dport => '587' },
 490     ],
 491     'Syslog' => [
 492         "Syslog protocol (RFC 5424) traffic",
 493         { action => 'PARAM', proto => 'udp', dport => '514' },
 494         { action => 'PARAM', proto => 'tcp', dport => '514' },
 495     ],
 496     'TFTP' => [
 497         "Trivial File Transfer Protocol traffic",
 498         { action => 'PARAM', proto => 'udp', dport => '69' },
 499     ],
 500     'Telnet' => [
 501         "Telnet traffic",
 502         { action => 'PARAM', proto => 'tcp', dport => '23' },
 503     ],
 504     'Telnets' => [
 505         "Telnet over SSL",
 506         { action => 'PARAM', proto => 'tcp', dport => '992' },
 507     ],
 508     'Time' => [
 509         "RFC 868 Time protocol",
 510         { action => 'PARAM', proto => 'tcp', dport => '37' },
 511     ],
 512     'Trcrt' => [
 513         "Traceroute (for up to 30 hops) traffic",
 514         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 515         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 516     ],
 517     'VNC' => [
 518         "VNC traffic for VNC display's 0 - 99",
 519         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 520     ],
 521     'VNCL' => [
 522         "VNC traffic from Vncservers to Vncviewers in listen mode",
 523         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 524     ],
 525     'Web' => [
 526         "WWW traffic (HTTP and HTTPS)",
 527         { action => 'PARAM', proto => 'tcp', dport => '80' },
 528         { action => 'PARAM', proto => 'tcp', dport => '443' },
 529     ],
 530     'Webcache' => [
 531         "Web Cache/Proxy traffic (port 8080)",
 532         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 533     ],
 534     'Webmin' => [
 535         "Webmin traffic",
 536         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 537     ],
 538     'Whois' => [
 539         "Whois (nicname, RFC 3912) traffic",
 540         { action => 'PARAM', proto => 'tcp', dport => '43' },
 541     ],
 542 };
 543
 544 my $pve_fw_parsed_macros;
 545 my $pve_fw_macro_descr;
 546 my $pve_fw_macro_ipversion = {};
 547 my $pve_fw_preferred_macro_names = {};
 548
 549 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 551
 552 my $pve_std_chains = {};
 553 my $pve_std_chains_conf = {};
 554 $pve_std_chains_conf->{4} = {
 555     'PVEFW-SET-ACCEPT-MARK' => [
 556         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 557     ],
 558     'PVEFW-DropBroadcast' => [
 559         # same as shorewall 'Broadcast'
 560         # simply DROP BROADCAST/MULTICAST/ANYCAST
 561         # we can use this to reduce logging
 562         { action => 'DROP', dsttype => 'BROADCAST' },
 563         { action => 'DROP', dsttype => 'MULTICAST' },
 564         { action => 'DROP', dsttype => 'ANYCAST' },
 565         { action => 'DROP', dest => '224.0.0.0/4' },
 566     ],
 567     'PVEFW-reject' => [
 568         # same as shorewall 'reject'
 569         { action => 'DROP', dsttype => 'BROADCAST' },
 570         { action => 'DROP', source => '224.0.0.0/4' },
 571         { action => 'DROP', proto => 'icmp' },
 572         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 573         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 574         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 575         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 576     ],
 577     'PVEFW-Drop' => [
 578         # same as shorewall 'Drop', which is equal to DROP,
 579         # but REJECT/DROP some packages to reduce logging,
 580         # and ACCEPT critical ICMP types
 581         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 582         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 583         { action => 'PVEFW-DropBroadcast' },
 584         # ACCEPT critical ICMP types
 585         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 586         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 587         # Drop packets with INVALID state
 588         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 589         # Drop Microsoft SMB noise
 590         { action => 'DROP', proto => 'udp', dport => '135,445' },
 591         { action => 'DROP', proto => 'udp', dport => '137:139' },
 592         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 593         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 594         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 595         # Drop new/NotSyn traffic so that it doesn't get logged
 596         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 597         # Drop DNS replies
 598         { action => 'DROP', proto => 'udp', sport => 53 },
 599     ],
 600     'PVEFW-Reject' => [
 601         # same as shorewall 'Reject', which is equal to Reject,
 602         # but REJECT/DROP some packages to reduce logging,
 603         # and ACCEPT critical ICMP types
 604         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 605         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 606         { action => 'PVEFW-DropBroadcast' },
 607         # ACCEPT critical ICMP types
 608         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 609         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 610         # Drop packets with INVALID state
 611         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 612         # Drop Microsoft SMB noise
 613         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 614         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 615         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 616         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 617         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 618         # Drop new/NotSyn traffic so that it doesn't get logged
 619         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 620         # Drop DNS replies
 621         { action => 'DROP', proto => 'udp', sport => 53 },
 622     ],
 623     'PVEFW-tcpflags' => [
 624         # same as shorewall tcpflags action.
 625         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 626         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 627         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 628         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 629         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 630         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 631     ],
 632     'PVEFW-smurfs' => [
 633         # same as shorewall smurfs action
 634         # Filter packets for smurfs (packets with a broadcast address as the source).
 635         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 636         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 637         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 638     ],
 639     'PVEFW-smurflog' => [
 640         { action => 'DROP', logmsg => 'DROP: ' },
 641     ],
 642     'PVEFW-logflags' => [
 643         { action => 'DROP', logmsg => 'DROP: ' },
 644     ],
 645 };
 646
 647 $pve_std_chains_conf->{6} = {
 648     'PVEFW-SET-ACCEPT-MARK' => [
 649         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 650     ],
 651     'PVEFW-DropBroadcast' => [
 652         # same as shorewall 'Broadcast'
 653         # simply DROP BROADCAST/MULTICAST/ANYCAST
 654         # we can use this to reduce logging
 655         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 656         # ipv6 addrtype does not work with kernel 2.6.32
 657         #{ action => 'DROP', dsttype => 'MULTICAST' },
 658         #{ action => 'DROP', dsttype => 'ANYCAST' },
 659         { action => 'DROP', dest => 'ff00::/8' },
 660         #{ action => 'DROP', dest => '224.0.0.0/4' },
 661     ],
 662     'PVEFW-reject' => [
 663         # same as shorewall 'reject'
 664         #{ action => 'DROP', dsttype => 'BROADCAST' },
 665         #{ action => 'DROP', source => '224.0.0.0/4' },
 666         { action => 'DROP', proto => 'icmpv6' },
 667         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 668         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 669         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 670         #"-j REJECT --reject-with icmp-host-prohibited",
 671     ],
 672     'PVEFW-Drop' => [
 673         # same as shorewall 'Drop', which is equal to DROP,
 674         # but REJECT/DROP some packages to reduce logging,
 675         # and ACCEPT critical ICMP types
 676         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 677         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 678         { action => 'PVEFW-DropBroadcast' },
 679         # ACCEPT critical ICMP types
 680         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 681         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 682         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 683         # Drop packets with INVALID state
 684         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 685         # Drop Microsoft SMB noise
 686         { action => 'DROP', proto => 'udp', dport => '135,445' },
 687         { action => 'DROP', proto => 'udp', dport => '137:139'},
 688         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 689         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 690         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 691         # Drop new/NotSyn traffic so that it doesn't get logged
 692         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 693         # Drop DNS replies
 694         { action => 'DROP', proto => 'udp', sport => 53 },
 695     ],
 696     'PVEFW-Reject' => [
 697         # same as shorewall 'Reject', which is equal to Reject,
 698         # but REJECT/DROP some packages to reduce logging,
 699         # and ACCEPT critical ICMP types
 700         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 701         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 702         { action => 'PVEFW-DropBroadcast' },
 703         # ACCEPT critical ICMP types
 704         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 705         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 706         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 707         # Drop packets with INVALID state
 708         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 709         # Drop Microsoft SMB noise
 710         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 711         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 712         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 713         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 714         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 715         # Drop new/NotSyn traffic so that it doesn't get logged
 716         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 717         # Drop DNS replies
 718         { action => 'DROP', proto => 'udp', sport => 53 },
 719     ],
 720     'PVEFW-tcpflags' => [
 721         # same as shorewall tcpflags action.
 722         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 723         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 724         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 725         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 726         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 727         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 728     ],
 729     'PVEFW-logflags' => [
 730         { action => 'DROP', logmsg => 'DROP: ' },
 731     ],
 732 };
 733
 734 # iptables -p icmp -h
 735 my $icmp_type_names = {
 736     any => 1,
 737     'echo-reply' => 1,
 738     'destination-unreachable' => 1,
 739     'network-unreachable' => 1,
 740     'host-unreachable' => 1,
 741     'protocol-unreachable' => 1,
 742     'port-unreachable' => 1,
 743     'fragmentation-needed' => 1,
 744     'source-route-failed' => 1,
 745     'network-unknown' => 1,
 746     'host-unknown' => 1,
 747     'network-prohibited' => 1,
 748     'host-prohibited' => 1,
 749     'TOS-network-unreachable' => 1,
 750     'TOS-host-unreachable' => 1,
 751     'communication-prohibited' => 1,
 752     'host-precedence-violation' => 1,
 753     'precedence-cutoff' => 1,
 754     'source-quench' => 1,
 755     'redirect' => 1,
 756     'network-redirect' => 1,
 757     'host-redirect' => 1,
 758     'TOS-network-redirect' => 1,
 759     'TOS-host-redirect' => 1,
 760     'echo-request' => 1,
 761     'router-advertisement' => 1,
 762     'router-solicitation' => 1,
 763     'time-exceeded' => 1,
 764     'ttl-zero-during-transit' => 1,
 765     'ttl-zero-during-reassembly' => 1,
 766     'parameter-problem' => 1,
 767     'ip-header-bad' => 1,
 768     'required-option-missing' => 1,
 769     'timestamp-request' => 1,
 770     'timestamp-reply' => 1,
 771     'address-mask-request' => 1,
 772     'address-mask-reply' => 1,
 773 };
 774
 775 # ip6tables -p icmpv6 -h
 776
 777 my $icmpv6_type_names = {
 778     'any' => 1,
 779     'destination-unreachable' => 1,
 780     'no-route' => 1,
 781     'communication-prohibited' => 1,
 782     'address-unreachable' => 1,
 783     'port-unreachable' => 1,
 784     'packet-too-big' => 1,
 785     'time-exceeded' => 1,
 786     'ttl-zero-during-transit' => 1,
 787     'ttl-zero-during-reassembly' => 1,
 788     'parameter-problem' => 1,
 789     'bad-header' => 1,
 790     'unknown-header-type' => 1,
 791     'unknown-option' => 1,
 792     'echo-request' => 1,
 793     'echo-reply' => 1,
 794     'router-solicitation' => 1,
 795     'router-advertisement' => 1,
 796     'neighbor-solicitation' => 1,
 797     'neighbour-solicitation' => 1,
 798     'neighbor-advertisement' => 1,
 799     'neighbour-advertisement' => 1,
 800     'redirect' => 1,
 801 };
 802
 803 sub init_firewall_macros {
 804
 805     $pve_fw_parsed_macros = {};
 806
 807     my $parse = sub {
 808         my ($k, $macro) = @_;
 809         my $lc_name = lc($k);
 810         $pve_fw_macro_ipversion->{$k} = 0;
 811         while (!ref($macro->[0])) {
 812             my $desc = shift @$macro;
 813             if ($desc eq 'ipv4only') {
 814                 $pve_fw_macro_ipversion->{$k} = 4;
 815             } elsif ($desc eq 'ipv6only') {
 816                 $pve_fw_macro_ipversion->{$k} = 6;
 817             } else {
 818                 $pve_fw_macro_descr->{$k} = $desc;
 819             }
 820         }
 821         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 822         $pve_fw_parsed_macros->{$k} = $macro;
 823     };
 824
 825     foreach my $k (keys %$pve_fw_macros) {
 826         &$parse($k, $pve_fw_macros->{$k});
 827     }
 828
 829     foreach my $k (keys %$pve_ipv6fw_macros) {
 830         next if $pve_fw_parsed_macros->{$k};
 831         &$parse($k, $pve_ipv6fw_macros->{$k});
 832         $pve_fw_macro_ipversion->{$k} = 6;
 833     }
 834 }
 835
 836 init_firewall_macros();
 837
 838 sub get_macros {
 839     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 840 }
 841
 842 my $etc_services;
 843
 844 sub get_etc_services {
 845
 846     return $etc_services if $etc_services;
 847
 848     my $filename = "/etc/services";
 849
 850     my $fh = IO::File->new($filename, O_RDONLY);
 851     if (!$fh) {
 852         warn "unable to read '$filename' - $!\n";
 853         return {};
 854     }
 855
 856     my $services = {};
 857
 858     while (my $line = <$fh>) {
 859         chomp ($line);
 860         next if $line =~m/^#/;
 861         next if ($line =~m/^\s*$/);
 862
 863         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 864             $services->{byid}->{$2}->{name} = $1;
 865             $services->{byid}->{$2}->{port} = $2;
 866             $services->{byid}->{$2}->{$3} = 1;
 867             $services->{byname}->{$1} = $services->{byid}->{$2};
 868         }
 869     }
 870
 871     close($fh);
 872
 873     $etc_services = $services;
 874
 875
 876     return $etc_services;
 877 }
 878
 879 sub parse_protocol_file {
 880     my ($filename) = @_;
 881
 882     my $fh = IO::File->new($filename, O_RDONLY);
 883     if (!$fh) {
 884         warn "unable to read '$filename' - $!\n";
 885         return {};
 886     }
 887
 888     my $protocols = {};
 889
 890     while (my $line = <$fh>) {
 891         chomp ($line);
 892         next if $line =~m/^#/;
 893         next if ($line =~m/^\s*$/);
 894
 895         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 896             $protocols->{byid}->{$2}->{name} = $1;
 897             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 898         }
 899     }
 900
 901     close($fh);
 902
 903     return $protocols;
 904 }
 905
 906 my $etc_protocols;
 907
 908 sub get_etc_protocols {
 909     return $etc_protocols if $etc_protocols;
 910
 911     my $protocols = parse_protocol_file('/etc/protocols');
 912
 913     # add special case for ICMP v6
 914     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 915     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 916
 917     $etc_protocols = $protocols;
 918
 919     return $etc_protocols;
 920 }
 921
 922 my $etc_ethertypes;
 923
 924 sub get_etc_ethertypes {
 925     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 926         if !$etc_ethertypes;
 927     return $etc_ethertypes;
 928 }
 929
 930 my $__local_network;
 931
 932 sub local_network {
 933     my ($new_value) = @_;
 934
 935     $__local_network = $new_value if defined($new_value);
 936
 937     return $__local_network if defined($__local_network);
 938
 939     eval {
 940         my $nodename = PVE::INotify::nodename();
 941
 942         my $ip = PVE::Cluster::remote_node_ip($nodename);
 943
 944         my $testip = Net::IP->new($ip);
 945
 946         my $isv6 = $testip->version == 6;
 947         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 948                            : PVE::ProcFSTools::read_proc_net_route();
 949         foreach my $entry (@$routes) {
 950             my $mask;
 951             if ($isv6) {
 952                 $mask = $entry->{prefix};
 953                 next if !$mask; # skip the default route...
 954             } else {
 955                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 956                 next if !defined($mask);
 957             }
 958             my $cidr = "$entry->{dest}/$mask";
 959             my $testnet = Net::IP->new($cidr);
 960             my $overlap = $testnet->overlaps($testip);
 961             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 962                 $overlap == $Net::IP::IP_IDENTICAL)
 963             {
 964                 $__local_network = $cidr;
 965                 return;
 966             }
 967         }
 968     };
 969     warn $@ if $@;
 970
 971     return $__local_network;
 972 }
 973
 974 # ipset names are limited to 31 characters,
 975 # and we use '-v4' or '-v6' to indicate IP versions,
 976 # and we use '_swap' suffix for atomic update,
 977 # for example PVEFW-${VMID}-${ipset_name}_swap
 978
 979 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 980
 981 sub compute_ipset_chain_name {
 982     my ($vmid, $ipset_name, $ipversion) = @_;
 983
 984     $vmid = 0 if !defined($vmid);
 985
 986     my $id = "$vmid-${ipset_name}-v$ipversion";
 987
 988     if (length($id) > $max_iptables_ipset_name_length) {
 989         $id = PVE::Tools::fnv31a_hex($id);
 990     }
 991
 992     return "PVEFW-$id";
 993 }
 994
 995 sub compute_ipfilter_ipset_name {
 996     my ($iface) = @_;
 997
 998     return "ipfilter-$iface";
 999 }
1000
1001 sub parse_address_list {
1002     my ($str) = @_;
1003
1004     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1005         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1006         return;
1007     }
1008
1009     if ($str =~ m/^${ip_alias_pattern}$/) {
1010         die "alias name too long\n" if length($str) > $max_alias_name_length;
1011         return;
1012     }
1013
1014     my $count = 0;
1015     my $iprange = 0;
1016     my $ipversion;
1017
1018     my @elements = split(/,/, $str);
1019     die "extraneous commas in list\n" if $str ne join(',', @elements);
1020     foreach my $elem (@elements) {
1021         $count++;
1022         my $ip = Net::IP->new($elem);
1023         if (!$ip) {
1024             my $err = Net::IP::Error();
1025             die "invalid IP address: $err\n";
1026         }
1027         $iprange = 1 if $elem =~ m/-/;
1028
1029         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1030
1031         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1032             if $ipversion && ($new_ipversion != $ipversion);
1033
1034         $ipversion = $new_ipversion;
1035     }
1036
1037     die "you can't use a range in a list\n" if $iprange && $count > 1;
1038
1039     return $ipversion;
1040 }
1041
1042 sub parse_port_name_number_or_range {
1043     my ($str, $dport) = @_;
1044
1045     my $services = PVE::Firewall::get_etc_services();
1046     my $count = 0;
1047     my $icmp_port = 0;
1048
1049     my @elements = split(/,/, $str);
1050     die "extraneous commas in list\n" if $str ne join(',', @elements);
1051     foreach my $item (@elements) {
1052         if ($item =~ m/^(\d+):(\d+)$/) {
1053             $count += 2;
1054             my ($port1, $port2) = ($1, $2);
1055             die "invalid port '$port1'\n" if $port1 > 65535;
1056             die "invalid port '$port2'\n" if $port2 > 65535;
1057         } elsif ($item =~ m/^(\d+)$/) {
1058             $count += 1;
1059             my $port = $1;
1060             die "invalid port '$port'\n" if $port > 65535;
1061         } else {
1062             if ($dport && $icmp_type_names->{$item}) {
1063                 $icmp_port = 1;
1064             } elsif ($dport && $icmpv6_type_names->{$item}) {
1065                 $icmp_port = 1;
1066             } else {
1067                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1068             }
1069         }
1070     }
1071
1072     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1073
1074     # I really don't like to use the word number here, but it's the only thing
1075     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1076     # one and not as 100...
1077     die "too many entries in port list (> 15 numbers)\n"
1078         if $count > 15;
1079
1080     return (scalar(@elements) > 1);
1081 }
1082
1083 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1084 sub pve_fw_verify_sport_spec {
1085    my ($portstr) = @_;
1086
1087    parse_port_name_number_or_range($portstr, 0);
1088
1089    return $portstr;
1090 }
1091
1092 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1093 sub pve_fw_verify_dport_spec {
1094    my ($portstr) = @_;
1095
1096    parse_port_name_number_or_range($portstr, 1);
1097
1098    return $portstr;
1099 }
1100
1101 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1102 sub pve_fw_verify_addr_spec {
1103    my ($list) = @_;
1104
1105    parse_address_list($list);
1106
1107    return $list;
1108 }
1109
1110 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1111 sub pve_fw_verify_protocol_spec {
1112    my ($proto) = @_;
1113
1114    my $protocols = get_etc_protocols();
1115
1116    die "unknown protocol '$proto'\n" if $proto &&
1117        !(defined($protocols->{byname}->{$proto}) ||
1118          defined($protocols->{byid}->{$proto}));
1119
1120    return $proto;
1121 }
1122
1123
1124 # helper function for API
1125
1126 sub copy_opject_with_digest {
1127     my ($object) = @_;
1128
1129     my $sha = Digest::SHA->new('sha1');
1130
1131     my $res = {};
1132     foreach my $k (sort keys %$object) {
1133         my $v = $object->{$k};
1134         next if !defined($v);
1135         $res->{$k} = $v;
1136         $sha->add($k, ':', $v, "\n");
1137     }
1138
1139     my $digest = $sha->hexdigest;
1140
1141     $res->{digest} = $digest;
1142
1143     return wantarray ? ($res, $digest) : $res;
1144 }
1145
1146 sub copy_list_with_digest {
1147     my ($list) = @_;
1148
1149     my $sha = Digest::SHA->new('sha1');
1150
1151     my $res = [];
1152     foreach my $entry (@$list) {
1153         my $data = {};
1154         foreach my $k (sort keys %$entry) {
1155             my $v = $entry->{$k};
1156             next if !defined($v);
1157             $data->{$k} = $v;
1158             # Note: digest ignores refs ($rule->{errors})
1159             # since Digest::SHA expects a series of bytes,
1160             #  we have to encode the value here to prevent errors when
1161             #  using utf8 characters (eg. in comments)
1162             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1163         }
1164         push @$res, $data;
1165     }
1166
1167     my $digest = $sha->hexdigest;
1168
1169     foreach my $entry (@$res) {
1170         $entry->{digest} = $digest;
1171     }
1172
1173     return wantarray ? ($res, $digest) : $res;
1174 }
1175
1176 our $cluster_option_properties = {
1177     enable => {
1178         description => "Enable or disable the firewall cluster wide.",
1179         type => 'integer',
1180         minimum => 0,
1181         optional => 1,
1182     },
1183     policy_in => {
1184         description => "Input policy.",
1185         type => 'string',
1186         optional => 1,
1187         enum => ['ACCEPT', 'REJECT', 'DROP'],
1188     },
1189     policy_out => {
1190         description => "Output policy.",
1191         type => 'string',
1192         optional => 1,
1193         enum => ['ACCEPT', 'REJECT', 'DROP'],
1194     },
1195 };
1196
1197 our $host_option_properties = {
1198     enable => {
1199         description => "Enable host firewall rules.",
1200         type => 'boolean',
1201         optional => 1,
1202     },
1203     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1204         description => "Log level for incoming traffic." }),
1205     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1206         description => "Log level for outgoing traffic." }),
1207     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1208         description => "Log level for illegal tcp flags filter." }),
1209     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1210         description => "Log level for SMURFS filter." }),
1211     nosmurfs => {
1212         description => "Enable SMURFS filter.",
1213         type => 'boolean',
1214         optional => 1,
1215     },
1216     tcpflags => {
1217         description => "Filter illegal combinations of TCP flags.",
1218         type => 'boolean',
1219         optional => 1,
1220     },
1221     nf_conntrack_max => {
1222         description => "Maximum number of tracked connections.",
1223         type => 'integer',
1224         optional => 1,
1225         minimum => 32768,
1226     },
1227     nf_conntrack_tcp_timeout_established => {
1228         description => "Conntrack established timeout.",
1229         type => 'integer',
1230         optional => 1,
1231         minimum => 7875,
1232     },
1233     ndp => {
1234         description => "Enable NDP.",
1235         type => 'boolean',
1236         optional => 1,
1237     },
1238 };
1239
1240 our $vm_option_properties = {
1241     enable => {
1242         description => "Enable/disable firewall rules.",
1243         type => 'boolean',
1244         optional => 1,
1245     },
1246     macfilter => {
1247         description => "Enable/disable MAC address filter.",
1248         type => 'boolean',
1249         optional => 1,
1250     },
1251     dhcp => {
1252         description => "Enable DHCP.",
1253         type => 'boolean',
1254         optional => 1,
1255     },
1256     ndp => {
1257         description => "Enable NDP.",
1258         type => 'boolean',
1259         optional => 1,
1260     },
1261     radv => {
1262         description => "Allow sending Router Advertisement.",
1263         type => 'boolean',
1264         optional => 1,
1265     },
1266     ipfilter => {
1267         description => "Enable default IP filters. " .
1268            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1269            "for every interface. Such ipsets implicitly contain sane default " .
1270            "restrictions such as restricting IPv6 link local addresses to " .
1271            "the one derived from the interface's MAC address. For containers " .
1272            "the configured IP addresses will be implicitly added.",
1273         type => 'boolean',
1274         optional => 1,
1275     },
1276     policy_in => {
1277         description => "Input policy.",
1278         type => 'string',
1279         optional => 1,
1280         enum => ['ACCEPT', 'REJECT', 'DROP'],
1281     },
1282     policy_out => {
1283         description => "Output policy.",
1284         type => 'string',
1285         optional => 1,
1286         enum => ['ACCEPT', 'REJECT', 'DROP'],
1287     },
1288     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1289         description => "Log level for incoming traffic." }),
1290     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1291         description => "Log level for outgoing traffic." }),
1292
1293 };
1294
1295
1296 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.";
1297
1298 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.";
1299
1300 my $rule_properties = {
1301     pos => {
1302         description => "Update rule at position <pos>.",
1303         type => 'integer',
1304         minimum => 0,
1305         optional => 1,
1306     },
1307     digest => get_standard_option('pve-config-digest'),
1308     type => {
1309         description => "Rule type.",
1310         type => 'string',
1311         optional => 1,
1312         enum => ['in', 'out', 'group'],
1313     },
1314     action => {
1315         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1316         type => 'string',
1317         optional => 1,
1318         pattern => $security_group_name_pattern,
1319         maxLength => 20,
1320         minLength => 2,
1321     },
1322     macro => {
1323         description => "Use predefined standard macro.",
1324         type => 'string',
1325         optional => 1,
1326         maxLength => 128,
1327     },
1328     iface => get_standard_option('pve-iface', {
1329         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.",
1330         optional => 1
1331     }),
1332     source => {
1333         description => "Restrict packet source address. $addr_list_descr",
1334         type => 'string', format => 'pve-fw-addr-spec',
1335         optional => 1,
1336     },
1337     dest => {
1338         description => "Restrict packet destination address. $addr_list_descr",
1339         type => 'string', format => 'pve-fw-addr-spec',
1340         optional => 1,
1341     },
1342     proto => {
1343         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1344         type => 'string', format => 'pve-fw-protocol-spec',
1345         optional => 1,
1346     },
1347     enable => {
1348         description => "Flag to enable/disable a rule.",
1349         type => 'integer',
1350         minimum => 0,
1351         optional => 1,
1352     },
1353     sport => {
1354         description => "Restrict TCP/UDP source port. $port_descr",
1355         type => 'string', format => 'pve-fw-sport-spec',
1356         optional => 1,
1357     },
1358     dport => {
1359         description => "Restrict TCP/UDP destination port. $port_descr",
1360         type => 'string', format => 'pve-fw-dport-spec',
1361         optional => 1,
1362     },
1363     comment => {
1364         description => "Descriptive comment.",
1365         type => 'string',
1366         optional => 1,
1367     },
1368 };
1369
1370 sub add_rule_properties {
1371     my ($properties) = @_;
1372
1373     foreach my $k (keys %$rule_properties) {
1374         my $h = $rule_properties->{$k};
1375         # copy data, so that we can modify later without side effects
1376         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1377     }
1378
1379     return $properties;
1380 }
1381
1382 sub delete_rule_properties {
1383     my ($rule, $delete_str) = @_;
1384
1385     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1386         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1387             if !defined($rule_properties->{$opt});
1388         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1389             if $opt eq 'type' || $opt eq 'action';
1390         delete $rule->{$opt};
1391     }
1392
1393     return $rule;
1394 }
1395
1396 my $apply_macro = sub {
1397     my ($macro_name, $param, $verify, $ipversion) = @_;
1398
1399     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1400     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1401
1402     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1403         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1404     }
1405
1406     # skip macros which are specific to another ipversion
1407     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1408         return if $ipversion != $required;
1409     }
1410
1411     my $rules = [];
1412
1413     foreach my $templ (@$macro_rules) {
1414         my $rule = {};
1415         my $param_used = {};
1416         foreach my $k (keys %$templ) {
1417             my $v = $templ->{$k};
1418             if ($v eq 'PARAM') {
1419                 $v = $param->{$k};
1420                 $param_used->{$k} = 1;
1421             } elsif ($v eq 'DEST') {
1422                 $v = $param->{dest};
1423                 $param_used->{dest} = 1;
1424             } elsif ($v eq 'SOURCE') {
1425                 $v = $param->{source};
1426                 $param_used->{source} = 1;
1427             }
1428
1429             if (!defined($v)) {
1430                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1431                 raise_param_exc({ macro => $msg }) if $verify;
1432                 die "$msg\n";
1433             }
1434             $rule->{$k} = $v;
1435         }
1436         foreach my $k (keys %$param) {
1437             next if $k eq 'macro';
1438             next if !defined($param->{$k});
1439             next if $param_used->{$k};
1440             if (defined($rule->{$k})) {
1441                 if ($rule->{$k} ne $param->{$k}) {
1442                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1443                     raise_param_exc({ $k => $msg }) if $verify;
1444                     die "$msg\n";
1445                 }
1446             } else {
1447                 $rule->{$k} = $param->{$k};
1448             }
1449         }
1450         push @$rules, $rule;
1451     }
1452
1453     return $rules;
1454 };
1455
1456 my $rule_env_iface_lookup = {
1457     'ct' => 1,
1458     'vm' => 1,
1459     'group' => 0,
1460     'cluster' => 1,
1461     'host' => 1,
1462 };
1463
1464 sub verify_rule {
1465     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1466
1467     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1468
1469     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1470     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1471
1472     my $errors = $rule->{errors} || {};
1473
1474     my $error_count = 0;
1475
1476     my $add_error = sub {
1477         my ($param, $msg)  = @_;
1478         chomp $msg;
1479         raise_param_exc({ $param => $msg }) if !$noerr;
1480         $error_count++;
1481         $errors->{$param} = $msg if !$errors->{$param};
1482     };
1483
1484     my $ipversion;
1485     my $set_ip_version = sub {
1486         my $vers = shift;
1487         if ($vers) {
1488             die "detected mixed ipv4/ipv6 adresses in rule\n"
1489                 if $ipversion && ($vers != $ipversion);
1490             $ipversion = $vers;
1491         }
1492     };
1493
1494     my $check_ipset_or_alias_property = sub {
1495         my ($name, $expected_ipversion) = @_;
1496
1497         if (my $value = $rule->{$name}) {
1498             if ($value =~ m/^\+/) {
1499                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1500                     &$add_error($name, "no such ipset '$1'")
1501                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1502
1503                 } else {
1504                     &$add_error($name, "invalid ipset name '$value'");
1505                 }
1506             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1507                 my $alias = lc($value);
1508                 &$add_error($name, "no such alias '$value'")
1509                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1510                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1511                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1512
1513                 &$set_ip_version($e->{ipversion});
1514             }
1515         }
1516     };
1517
1518     my $type = $rule->{type};
1519     my $action = $rule->{action};
1520
1521     &$add_error('type', "missing property") if !$type;
1522     &$add_error('action', "missing property") if !$action;
1523
1524     if ($type) {
1525         if ($type eq  'in' || $type eq 'out') {
1526             &$add_error('action', "unknown action '$action'")
1527                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1528         } elsif ($type eq 'group') {
1529             &$add_error('type', "security groups not allowed")
1530                 if !$allow_groups;
1531             &$add_error('action', "invalid characters in security group name")
1532                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1533         } else {
1534             &$add_error('type', "unknown rule type '$type'");
1535         }
1536     }
1537
1538     if ($rule->{iface}) {
1539         &$add_error('type', "parameter -i not allowed for this rule type")
1540             if !$allow_iface;
1541         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1542         &$add_error('iface', $@) if $@;
1543         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1544             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1545                 if $rule->{iface} !~  m/^net(\d+)$/;
1546         }
1547     }
1548
1549     if ($rule->{macro}) {
1550         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1551             $rule->{macro} = $preferred_name;
1552         } else {
1553             &$add_error('macro', "unknown macro '$rule->{macro}'");
1554         }
1555     }
1556
1557     if ($rule->{proto}) {
1558         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1559         &$add_error('proto', $@) if $@;
1560         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1561         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1562     }
1563
1564     if ($rule->{dport}) {
1565         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1566         &$add_error('dport', $@) if $@;
1567         my $proto = $rule->{proto};
1568         &$add_error('proto', "missing property - 'dport' requires this property")
1569             if !$proto;
1570         &$add_error('dport', "protocol '$proto' does not support ports")
1571             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1572                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1573     }
1574
1575     if ($rule->{sport}) {
1576         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1577         &$add_error('sport', $@) if $@;
1578         my $proto = $rule->{proto};
1579         &$add_error('proto', "missing property - 'sport' requires this property")
1580             if !$proto;
1581         &$add_error('sport', "protocol '$proto' does not support ports")
1582             if !$PROTOCOLS_WITH_PORTS->{$proto};
1583     }
1584
1585     if ($rule->{source}) {
1586         eval {
1587             my $source_ipversion = parse_address_list($rule->{source});
1588             &$set_ip_version($source_ipversion);
1589         };
1590         &$add_error('source', $@) if $@;
1591         &$check_ipset_or_alias_property('source', $ipversion);
1592     }
1593
1594     if ($rule->{dest}) {
1595         eval {
1596             my $dest_ipversion = parse_address_list($rule->{dest});
1597             &$set_ip_version($dest_ipversion);
1598         };
1599         &$add_error('dest', $@) if $@;
1600         &$check_ipset_or_alias_property('dest', $ipversion);
1601     }
1602
1603     $rule->{ipversion} = $ipversion if $ipversion;
1604
1605     if ($rule->{macro} && !$error_count) {
1606         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1607         if (my $err = $@) {
1608             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1609                 my $eh = $err->{errors};
1610                 foreach my $p (keys %$eh) {
1611                     &$add_error($p, $eh->{$p});
1612                 }
1613             } else {
1614                 &$add_error('macro', "$err");
1615             }
1616         }
1617     }
1618
1619     $rule->{errors} = $errors if $error_count;
1620
1621     return $rule;
1622 }
1623
1624 sub copy_rule_data {
1625     my ($rule, $param) = @_;
1626
1627     foreach my $k (keys %$rule_properties) {
1628         if (defined(my $v = $param->{$k})) {
1629             if ($v eq '' || $v eq '-') {
1630                 delete $rule->{$k};
1631             } else {
1632                 $rule->{$k} = $v;
1633             }
1634         }
1635     }
1636
1637     return $rule;
1638 }
1639
1640 sub rules_modify_permissions {
1641     my ($rule_env) = @_;
1642
1643     if ($rule_env eq 'host') {
1644         return {
1645             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1646         };
1647     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1648         return {
1649             check => ['perm', '/', [ 'Sys.Modify' ]],
1650         };
1651     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1652         return {
1653             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1654         }
1655     }
1656
1657     return undef;
1658 }
1659
1660 sub rules_audit_permissions {
1661     my ($rule_env) = @_;
1662
1663     if ($rule_env eq 'host') {
1664         return {
1665             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1666         };
1667     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1668         return {
1669             check => ['perm', '/', [ 'Sys.Audit' ]],
1670         };
1671     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1672         return {
1673             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1674         }
1675     }
1676
1677     return undef;
1678 }
1679
1680 # core functions
1681 my $bridge_firewall_enabled = 0;
1682
1683 sub enable_bridge_firewall {
1684
1685     return if $bridge_firewall_enabled; # only once
1686
1687     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1688     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1689
1690     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1691     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1692
1693     $bridge_firewall_enabled = 1;
1694 }
1695
1696 sub iptables_restore_cmdlist {
1697     my ($cmdlist) = @_;
1698
1699     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1700 }
1701
1702 sub ip6tables_restore_cmdlist {
1703     my ($cmdlist) = @_;
1704
1705     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1706 }
1707
1708 sub ipset_restore_cmdlist {
1709     my ($cmdlist) = @_;
1710
1711     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1712 }
1713
1714 sub ebtables_restore_cmdlist {
1715     my ($cmdlist) = @_;
1716
1717     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1718 }
1719
1720 sub iptables_get_chains {
1721     my ($iptablescmd) = @_;
1722
1723     $iptablescmd = "iptables" if !$iptablescmd;
1724
1725     my $res = {};
1726
1727     # check what chains we want to track
1728     my $is_pvefw_chain = sub {
1729         my $name = shift;
1730
1731         return 1 if $name =~ m/^PVEFW-\S+$/;
1732
1733         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1734
1735         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1736
1737         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1738         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1739
1740         return undef;
1741     };
1742
1743     my $table = '';
1744
1745     my $hooks = {};
1746
1747     my $parser = sub {
1748         my $line = shift;
1749
1750         return if $line =~ m/^#/;
1751         return if $line =~ m/^\s*$/;
1752
1753         if ($line =~ m/^\*(\S+)$/) {
1754             $table = $1;
1755             return;
1756         }
1757
1758         return if $table ne 'filter';
1759
1760         if ($line =~ m/^:(\S+)\s/) {
1761             my $chain = $1;
1762             return if !&$is_pvefw_chain($chain);
1763             $res->{$chain} = "unknown";
1764         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1765             my ($chain, $sig) = ($1, $2);
1766             return if !&$is_pvefw_chain($chain);
1767             $res->{$chain} = $sig;
1768         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1769             $hooks->{$1} = 1;
1770         } else {
1771             # simply ignore the rest
1772             return;
1773         }
1774     };
1775
1776     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1777
1778     return wantarray ? ($res, $hooks) : $res;
1779 }
1780
1781 sub iptables_chain_digest {
1782     my ($rules) = @_;
1783     my $digest = Digest::SHA->new('sha1');
1784     foreach my $rule (@$rules) { # order is important
1785         $digest->add($rule);
1786     }
1787     return $digest->b64digest;
1788 }
1789
1790 sub ipset_chain_digest {
1791     my ($rules) = @_;
1792
1793     my $digest = Digest::SHA->new('sha1');
1794     foreach my $rule (sort @$rules) { # note: sorted
1795         $digest->add($rule);
1796     }
1797     return $digest->b64digest;
1798 }
1799
1800 sub ipset_get_chains {
1801
1802     my $res = {};
1803     my $chains = {};
1804
1805     my $parser = sub {
1806         my $line = shift;
1807
1808         return if $line =~ m/^#/;
1809         return if $line =~ m/^\s*$/;
1810         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1811             my $chain = $1;
1812             $line =~ s/\s+$//; # delete trailing white space
1813             push @{$chains->{$chain}}, $line;
1814         } else {
1815             # simply ignore the rest
1816             return;
1817         }
1818     };
1819
1820     run_command("/sbin/ipset save", outfunc => $parser);
1821
1822     # compute digest for each chain
1823     foreach my $chain (keys %$chains) {
1824         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1825     }
1826
1827     return $res;
1828 }
1829
1830 sub ebtables_get_chains {
1831
1832     my $res = {};
1833     my $chains = {};
1834     my $parser = sub {
1835         my $line = shift;
1836         return if $line =~ m/^#/;
1837         return if $line =~ m/^\s*$/;
1838         if ($line =~ m/^:(\S+)\s\S+$/) {
1839             # Make sure we know chains exist even if they're empty.
1840             $chains->{$1} //= [];
1841         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1842             my $chain = $1;
1843             $line =~ s/\s+$//;
1844             push @{$chains->{$chain}}, $line;
1845         } else {
1846             # simply ignore the rest
1847             return;
1848         }
1849     };
1850
1851     run_command("/sbin/ebtables-save", outfunc => $parser);
1852     # compute digest for each chain and store rules as well
1853     foreach my $chain (keys %$chains) {
1854         $res->{$chain}->{rules} = $chains->{$chain};
1855         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1856     }
1857     return $res;
1858 }
1859
1860 # substitude action of rule according to action hash
1861 sub rule_substitude_action {
1862     my ($rule, $actions) = @_;
1863
1864     if (my $action = $rule->{action}) {
1865         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1866     }
1867 }
1868
1869 # generate a src or dst match
1870 # $dir(ection) is either d or s
1871 sub ipt_gen_src_or_dst_match {
1872     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1873
1874     my $srcdst;
1875     if ($dir eq 's') {
1876         $srcdst = "src";
1877     } elsif ($dir eq 'd') {
1878         $srcdst = "dst";
1879     } else {
1880         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1881     }
1882
1883     my $match;
1884     if ($adr =~ m/^\+/) {
1885         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1886             my $name = $1;
1887             my $ipset_chain;
1888             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1889                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1890             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1891                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1892             } else {
1893                 die "no such ipset '$name'\n";
1894             }
1895             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1896         } else {
1897             die "invalid security group name '$adr'\n";
1898         }
1899     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1900         my $alias = lc($adr);
1901         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1902         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1903         die "no such alias '$adr'\n" if !$e;
1904         $match = "-${dir} $e->{cidr}";
1905     } elsif ($adr =~ m/\-/){
1906         $match = "-m iprange --${srcdst}-range $adr";
1907     } else {
1908         $match = "-${dir} $adr";
1909     }
1910
1911     return $match;
1912 }
1913
1914 # convert a %rule to an array of iptables commands
1915 sub ipt_rule_to_cmds {
1916     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1917
1918     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1919
1920     my @match = ();
1921
1922     if (defined $rule->{match}) {
1923         push @match, $rule->{match};
1924     } else {
1925         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1926         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1927
1928         if ($rule->{source}) {
1929             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1930         }
1931         if ($rule->{dest}) {
1932             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1933         }
1934
1935         if (my $proto = $rule->{proto}) {
1936             push @match, "-p $proto";
1937
1938             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1939             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1940
1941             my $add_dport = sub {
1942                 return if !$rule->{dport};
1943
1944                 if ($proto eq 'icmp') {
1945                     # Note: we use dport to store --icmp-type
1946                     die "unknown icmp-type '$rule->{dport}'\n"
1947                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1948                     push @match, "-m icmp --icmp-type $rule->{dport}";
1949                 } elsif ($proto eq 'icmpv6') {
1950                     # Note: we use dport to store --icmpv6-type
1951                     die "unknown icmpv6-type '$rule->{dport}'\n"
1952                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1953                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1954                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1955                     die "protocol $proto does not have ports\n";
1956                 } elsif ($multidport) {
1957                     push @match, "--match multiport", "--dports $rule->{dport}";
1958                 } else {
1959                     push @match, "--dport $rule->{dport}";
1960                 }
1961             };
1962
1963             my $add_sport = sub {
1964                 return if !$rule->{sport};
1965
1966                 die "protocol $proto does not have ports\n"
1967                     if !$PROTOCOLS_WITH_PORTS->{$proto};
1968                 if ($multisport) {
1969                     push @match, "--match multiport", "--sports $rule->{sport}";
1970                 } else {
1971                     push @match, "--sport $rule->{sport}";
1972                 }
1973             };
1974
1975             # order matters - single port before multiport!
1976             $add_dport->() if $multisport;
1977             $add_sport->();
1978             $add_dport->() if !$multisport;
1979         } elsif ($rule->{dport} || $rule->{sport}) {
1980             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1981             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1982         }
1983
1984         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1985     }
1986     my $matchstr = scalar(@match) ? join(' ', @match) : "";
1987
1988     my $targetstr;
1989     if (defined $rule->{target}) {
1990         $targetstr = $rule->{target};
1991     } else {
1992         my $action = (defined $rule->{action}) ? $rule->{action} : "";
1993         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
1994         $targetstr = ($goto) ? "-g $action" : "-j $action";
1995     }
1996
1997     my @iptcmds;
1998     if (defined $rule->{log} && $rule->{log}) {
1999         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
2000         push @iptcmds, "-A $chain $matchstr $logaction";
2001     }
2002     push @iptcmds, "-A $chain $matchstr $targetstr";
2003     return @iptcmds;
2004 }
2005
2006 sub ruleset_generate_rule {
2007     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
2008
2009     my $rules;
2010
2011     if ($rule->{macro}) {
2012         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2013     } else {
2014         $rules = [ $rule ];
2015     }
2016
2017     # update all or nothing
2018     my @ipt_rule_cmds;
2019     foreach my $r (@$rules) {
2020         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
2021     }
2022     foreach my $c (@ipt_rule_cmds) {
2023         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2024     }
2025 }
2026
2027 sub ruleset_create_chain {
2028     my ($ruleset, $chain) = @_;
2029
2030     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2031     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2032
2033     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2034
2035     $ruleset->{$chain} = [];
2036 }
2037
2038 sub ruleset_chain_exist {
2039     my ($ruleset, $chain) = @_;
2040
2041     return $ruleset->{$chain} ? 1 : undef;
2042 }
2043
2044 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2045 sub ruleset_add_ipt_cmd {
2046    my ($ruleset, $chain, $iptcmd) = @_;
2047
2048    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2049
2050    push @{$ruleset->{$chain}}, $iptcmd;
2051 }
2052
2053 sub ruleset_addrule {
2054    my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2055
2056    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2057
2058    if (defined($log) && $log) {
2059         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2060         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2061    }
2062    # for stable ebtables digests avoid double-spaces to match ebtables-save output
2063    $match .= ' ' if length($match);
2064    push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2065 }
2066
2067 sub ruleset_insertrule {
2068    my ($ruleset, $chain, $match, $action, $log) = @_;
2069
2070    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2071
2072    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2073 }
2074
2075 sub get_log_rule_base {
2076     my ($chain, $vmid, $msg, $loglevel) = @_;
2077
2078     $vmid = 0 if !defined($vmid);
2079     $msg = "" if !defined($msg);
2080
2081     # Note: we use special format for prefix to pass further
2082     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2083
2084     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2085 }
2086
2087 sub ruleset_add_chain_policy {
2088     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2089
2090     if ($policy eq 'ACCEPT') {
2091
2092         my $rule = { action => 'ACCEPT' };
2093         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2094         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2095
2096     } elsif ($policy eq 'DROP') {
2097
2098         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2099
2100         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2101     } elsif ($policy eq 'REJECT') {
2102         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2103
2104         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2105     } else {
2106         # should not happen
2107         die "internal error: unknown policy '$policy'";
2108     }
2109 }
2110
2111 sub ruleset_chain_add_ndp {
2112     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2113     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2114
2115     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2116     if ($direction ne 'OUT' || $options->{radv}) {
2117         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2118     }
2119     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2120     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2121 }
2122
2123 sub ruleset_chain_add_conn_filters {
2124     my ($ruleset, $chain, $accept) = @_;
2125
2126     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2127     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2128 }
2129
2130 sub ruleset_chain_add_input_filters {
2131     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2132
2133     if ($cluster_conf->{ipset}->{blacklist}){
2134         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2135             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2136             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2137         }
2138         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2139         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2140     }
2141
2142     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2143         if ($ipversion == 4) {
2144             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2145         }
2146     }
2147
2148     if ($options->{tcpflags}) {
2149         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2150     }
2151 }
2152
2153 sub ruleset_create_vm_chain {
2154     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2155
2156     ruleset_create_chain($ruleset, $chain);
2157     my $accept = generate_nfqueue($options);
2158
2159     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2160         if ($ipversion == 4) {
2161             if ($direction eq 'OUT') {
2162                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2163                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2164                                         proto => 'udp', sport => 68, dport => 67 });
2165             } else {
2166                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2167                                       { action => 'ACCEPT',
2168                                         proto => 'udp', sport => 67, dport => 68 });
2169             }
2170         } elsif ($ipversion == 6) {
2171             if ($direction eq 'OUT') {
2172                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2173                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2174                                         proto => 'udp', sport => 546, dport => 547 });
2175             } else {
2176                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2177                                       { action => 'ACCEPT',
2178                                         proto => 'udp', sport => 547, dport => 546 });
2179             }
2180         }
2181
2182     }
2183
2184     if ($direction eq 'OUT') {
2185         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2186             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2187         }
2188         if ($ipversion == 6 && !$options->{radv}) {
2189             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2190         }
2191         if ($ipfilter_ipset) {
2192             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2193         }
2194         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2195     }
2196
2197     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2198     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2199 }
2200
2201 sub ruleset_add_group_rule {
2202     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2203
2204     my $group = $rule->{action};
2205     my $group_chain = "GROUP-$group-$direction";
2206     if(!ruleset_chain_exist($ruleset, $group_chain)){
2207         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2208     }
2209
2210     if ($direction eq 'OUT' && $rule->{iface_out}) {
2211         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2212     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2213         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2214     } else {
2215         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2216     }
2217
2218     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2219 }
2220
2221 sub ruleset_generate_vm_rules {
2222     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2223
2224     my $lc_direction = lc($direction);
2225
2226     my $in_accept = generate_nfqueue($options);
2227
2228     foreach my $rule (@$rules) {
2229         next if $rule->{iface} && $rule->{iface} ne $netid;
2230         next if !$rule->{enable} || $rule->{errors};
2231         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2232
2233         if ($rule->{type} eq 'group') {
2234             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2235                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2236         } else {
2237             next if $rule->{type} ne $lc_direction;
2238             eval {
2239                 if ($direction eq 'OUT') {
2240                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2241                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2242                 } else {
2243                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2244                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2245                 }
2246             };
2247             warn $@ if $@;
2248         }
2249     }
2250 }
2251
2252 sub generate_nfqueue {
2253     my ($options) = @_;
2254
2255     if ($options->{ips}) {
2256         my $action = "NFQUEUE";
2257         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2258             if (defined($3) && defined($1)) {
2259                 $action .= " --queue-balance $1:$3";
2260             } elsif (defined($1)) {
2261                 $action .= " --queue-num $1";
2262             }
2263         }
2264         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2265         return $action;
2266     } else {
2267         return "ACCEPT";
2268     }
2269 }
2270
2271 sub ruleset_generate_vm_ipsrules {
2272     my ($ruleset, $options, $direction, $iface) = @_;
2273
2274     if ($options->{ips} && $direction eq 'IN') {
2275         my $nfqueue = generate_nfqueue($options);
2276
2277         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2278             ruleset_create_chain($ruleset, "PVEFW-IPS");
2279         }
2280
2281         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2282     }
2283 }
2284
2285 sub generate_tap_rules_direction {
2286     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2287
2288     my $lc_direction = lc($direction);
2289
2290     my $rules = $vmfw_conf->{rules};
2291
2292     my $options = $vmfw_conf->{options};
2293     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2294
2295     my $tapchain = "$iface-$direction";
2296
2297     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2298     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2299         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2300
2301     # create chain with mac and ip filter
2302     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2303
2304     if ($options->{enable}) {
2305         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2306
2307         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2308
2309         # implement policy
2310         my $policy;
2311
2312         if ($direction eq 'OUT') {
2313             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2314         } else {
2315         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2316         }
2317
2318         my $accept = generate_nfqueue($options);
2319         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2320         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2321     } else {
2322         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2323         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2324     }
2325
2326     # plug the tap chain to bridge chain
2327     if ($direction eq 'IN') {
2328         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2329                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2330     } else {
2331         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2332                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2333     }
2334 }
2335
2336 sub enable_host_firewall {
2337     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2338
2339     my $options = $hostfw_conf->{options};
2340     my $cluster_options = $cluster_conf->{options};
2341     my $rules = $hostfw_conf->{rules};
2342     my $cluster_rules = $cluster_conf->{rules};
2343
2344     # host inbound firewall
2345     my $chain = "PVEFW-HOST-IN";
2346     ruleset_create_chain($ruleset, $chain);
2347
2348     my $loglevel = get_option_log_level($options, "log_level_in");
2349
2350     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2351
2352     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2353     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2354     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2355
2356     # we use RETURN because we need to check also tap rules
2357     my $accept_action = 'RETURN';
2358
2359     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2360
2361     # add host rules first, so that cluster wide rules can be overwritten
2362     foreach my $rule (@$rules, @$cluster_rules) {
2363         next if !$rule->{enable} || $rule->{errors};
2364         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2365
2366         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2367
2368         eval {
2369             if ($rule->{type} eq 'group') {
2370                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2371             } elsif ($rule->{type} eq 'in') {
2372                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2373                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2374             }
2375         };
2376         warn $@ if $@;
2377         delete $rule->{iface_in};
2378     }
2379
2380     # allow standard traffic for management ipset (includes cluster network)
2381     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2382     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2383     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2384     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2385     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2386     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2387
2388     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2389     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2390
2391     # corosync
2392     if ($localnet && ($ipversion == $localnet_ver)) {
2393         my $corosync_rule = "-p udp --dport 5404:5405";
2394         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2395         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2396     }
2397
2398     # implement input policy
2399     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2400     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2401
2402     # host outbound firewall
2403     $chain = "PVEFW-HOST-OUT";
2404     ruleset_create_chain($ruleset, $chain);
2405
2406     $loglevel = get_option_log_level($options, "log_level_out");
2407
2408     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2409
2410     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2411
2412     # we use RETURN because we may want to check other thigs later
2413     $accept_action = 'RETURN';
2414     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2415
2416     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2417
2418     # add host rules first, so that cluster wide rules can be overwritten
2419     foreach my $rule (@$rules, @$cluster_rules) {
2420         next if !$rule->{enable} || $rule->{errors};
2421         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2422
2423         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2424         eval {
2425             if ($rule->{type} eq 'group') {
2426                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2427             } elsif ($rule->{type} eq 'out') {
2428                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2429                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2430             }
2431         };
2432         warn $@ if $@;
2433         delete $rule->{iface_out};
2434     }
2435
2436     # allow standard traffic on cluster network
2437     if ($localnet && ($ipversion == $localnet_ver)) {
2438         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2439         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2440         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2441         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2442
2443         my $corosync_rule = "-p udp --dport 5404:5405";
2444         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2445         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2446     }
2447
2448     # implement output policy
2449     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2450     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2451
2452     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2453     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2454 }
2455
2456 sub generate_group_rules {
2457     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2458
2459     my $rules = $cluster_conf->{groups}->{$group};
2460
2461     if (!$rules) {
2462         warn "no such security group '$group'\n";
2463         $rules = []; # create empty chain
2464     }
2465
2466     my $chain = "GROUP-${group}-IN";
2467
2468     ruleset_create_chain($ruleset, $chain);
2469     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2470
2471     foreach my $rule (@$rules) {
2472         next if $rule->{type} ne 'in';
2473         next if !$rule->{enable} || $rule->{errors};
2474         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2475         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2476         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2477     }
2478
2479     $chain = "GROUP-${group}-OUT";
2480
2481     ruleset_create_chain($ruleset, $chain);
2482     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2483
2484     foreach my $rule (@$rules) {
2485         next if $rule->{type} ne 'out';
2486         next if !$rule->{enable} || $rule->{errors};
2487         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2488         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2489         # check also other tap rules later
2490         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2491         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2492     }
2493 }
2494
2495 my $MAX_NETS = 32;
2496 my $valid_netdev_names = {};
2497 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2498     $valid_netdev_names->{"net$i"} = 1;
2499 }
2500
2501 sub get_mark_values {
2502     my ($value, $mask) = @_;
2503     $value = hex($value) if $value =~ /^0x/;
2504     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2505     $mask = 0xffffffff if !defined($mask);
2506     return ($value, $mask);
2507 }
2508
2509 sub parse_fw_rule {
2510     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2511
2512     my $orig_line = $line;
2513
2514     my $rule = {};
2515
2516     # we can add single line comments to the end of the rule
2517     if ($line =~ s/#\s*(.*?)\s*$//) {
2518         $rule->{comment} = decode('utf8', $1);
2519     }
2520
2521     # we can disable a rule when prefixed with '|'
2522
2523     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2524
2525     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2526         die "unable to parse rule: $line\n";
2527
2528     $rule->{type} = lc($1);
2529     $rule->{action} = $2;
2530
2531     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2532         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2533             $rule->{macro} = $1;
2534             $rule->{action} = $2;
2535         }
2536     }
2537
2538     while (length($line)) {
2539         if ($line =~ s/^-i (\S+)\s*//) {
2540             $rule->{iface} = $1;
2541             next;
2542         }
2543
2544         last if $rule->{type} eq 'group';
2545
2546         if ($line =~ s/^-p (\S+)\s*//) {
2547             $rule->{proto} = $1;
2548             next;
2549         }
2550
2551         if ($line =~ s/^-dport (\S+)\s*//) {
2552             $rule->{dport} = $1;
2553             next;
2554         }
2555
2556         if ($line =~ s/^-sport (\S+)\s*//) {
2557             $rule->{sport} = $1;
2558             next;
2559         }
2560         if ($line =~ s/^-source (\S+)\s*//) {
2561             $rule->{source} = $1;
2562             next;
2563         }
2564         if ($line =~ s/^-dest (\S+)\s*//) {
2565             $rule->{dest} = $1;
2566             next;
2567         }
2568
2569         last;
2570     }
2571
2572     die "unable to parse rule parameters: $line\n" if length($line);
2573
2574     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2575     if ($rule->{errors}) {
2576         # The verbose flag really means we're running from the CLI and want
2577         # output on the console - in the other case we really want such errors
2578         # to go into the syslog instead.
2579         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2580         $log->("$prefix - errors in rule parameters: $orig_line\n");
2581         foreach my $p (keys %{$rule->{errors}}) {
2582             $log->("  $p: $rule->{errors}->{$p}\n");
2583         }
2584     }
2585
2586     return $rule;
2587 }
2588
2589 sub verify_ethertype {
2590     my ($value) = @_;
2591     my $types = get_etc_ethertypes();
2592     die "unknown ethernet protocol type: $value\n"
2593         if !defined($types->{byname}->{$value}) &&
2594            !defined($types->{byid}->{$value});
2595 }
2596
2597 sub parse_vmfw_option {
2598     my ($line) = @_;
2599
2600     my ($opt, $value);
2601
2602     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2603
2604     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2605         $opt = lc($1);
2606         $value = int($2);
2607     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2608         $opt = lc($1);
2609         $value = $2 ? lc($3) : '';
2610     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2611         $opt = lc($1);
2612         $value = uc($3);
2613     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2614         $opt = lc($1);
2615         $value = $2;
2616     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2617         $opt = lc($1);
2618         $value = $2;
2619         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2620     } else {
2621         die "can't parse option '$line'\n"
2622     }
2623
2624     return ($opt, $value);
2625 }
2626
2627 sub parse_hostfw_option {
2628     my ($line) = @_;
2629
2630     my ($opt, $value);
2631
2632     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2633
2634     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2635         $opt = lc($1);
2636         $value = int($2);
2637     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2638         $opt = lc($1);
2639         $value = $2 ? lc($3) : '';
2640     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2641         $opt = lc($1);
2642         $value = int($2);
2643     } else {
2644         die "can't parse option '$line'\n"
2645     }
2646
2647     return ($opt, $value);
2648 }
2649
2650 sub parse_clusterfw_option {
2651     my ($line) = @_;
2652
2653     my ($opt, $value);
2654
2655     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2656         $opt = lc($1);
2657         $value = int($2);
2658         if (($value > 1) && ((time() - $value) > 60)) {
2659             $value = 0
2660         }
2661     } elsif ($line =~ m/^(ebtables_enable):\s*(0|1)\s*$/i) {
2662         $opt = lc($1);
2663         $value = int($2);
2664     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2665         $opt = lc($1);
2666         $value = uc($3);
2667     } else {
2668         die "can't parse option '$line'\n"
2669     }
2670
2671     return ($opt, $value);
2672 }
2673
2674 sub resolve_alias {
2675     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2676
2677     my $alias = lc($cidr);
2678     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2679     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2680
2681     die "no such alias '$cidr'\n" if !$e;;
2682
2683     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2684 }
2685
2686 sub parse_ip_or_cidr {
2687     my ($cidr) = @_;
2688
2689     my $ipversion;
2690
2691     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2692         $cidr =~ s|/128$||;
2693         $ipversion = 6;
2694     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2695         $cidr =~ s|/32$||;
2696         $ipversion = 4;
2697     } else {
2698         die "value does not look like a valid IP address or CIDR network\n";
2699     }
2700
2701     return wantarray ? ($cidr, $ipversion) : $cidr;
2702 }
2703
2704 sub parse_alias {
2705     my ($line) = @_;
2706
2707     # we can add single line comments to the end of the line
2708     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2709
2710     if ($line =~ m/^(\S+)\s(\S+)$/) {
2711         my ($name, $cidr) = ($1, $2);
2712         my $ipversion;
2713
2714         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2715
2716         my $data = {
2717             name => $name,
2718             cidr => $cidr,
2719             ipversion => $ipversion,
2720         };
2721         $data->{comment} = $comment  if $comment;
2722         return $data;
2723     }
2724
2725     return undef;
2726 }
2727
2728 sub generic_fw_config_parser {
2729     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2730
2731     my $section;
2732     my $group;
2733
2734     my $res = $empty_conf;
2735
2736     while (defined(my $line = <$fh>)) {
2737         next if $line =~ m/^#/;
2738         next if $line =~ m/^\s*$/;
2739
2740         chomp $line;
2741
2742         my $linenr = $fh->input_line_number();
2743         my $prefix = "$filename (line $linenr)";
2744
2745         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2746             $section = 'options';
2747             next;
2748         }
2749
2750         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2751             $section = 'aliases';
2752             next;
2753         }
2754
2755         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2756             $section = 'groups';
2757             $group = lc($1);
2758             my $comment = $2;
2759             eval {
2760                 die "security group name too long\n" if length($group) > $max_group_name_length;
2761                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2762             };
2763             if (my $err = $@) {
2764                 ($section, $group, $comment) = undef;
2765                 warn "$prefix: $err";
2766                 next;
2767             }
2768
2769             $res->{$section}->{$group} = [];
2770             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2771                 if $comment;
2772             next;
2773         }
2774
2775         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2776             $section = 'rules';
2777             next;
2778         }
2779
2780         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2781             $section = 'ipset';
2782             $group = lc($1);
2783             my $comment = $2;
2784             eval {
2785                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2786                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2787             };
2788             if (my $err = $@) {
2789                 ($section, $group, $comment) = undef;
2790                 warn "$prefix: $err";
2791                 next;
2792             }
2793
2794             $res->{$section}->{$group} = [];
2795             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2796                 if $comment;
2797             next;
2798         }
2799
2800         if (!$section) {
2801             warn "$prefix: skip line - no section\n";
2802             next;
2803         }
2804
2805         if ($section eq 'options') {
2806             eval {
2807                 my ($opt, $value);
2808                 if ($rule_env eq 'cluster') {
2809                     ($opt, $value) = parse_clusterfw_option($line);
2810                 } elsif ($rule_env eq 'host') {
2811                     ($opt, $value) = parse_hostfw_option($line);
2812                 } else {
2813                     ($opt, $value) = parse_vmfw_option($line);
2814                 }
2815                 $res->{options}->{$opt} = $value;
2816             };
2817             warn "$prefix: $@" if $@;
2818         } elsif ($section eq 'aliases') {
2819             eval {
2820                 my $data = parse_alias($line);
2821                 $res->{aliases}->{lc($data->{name})} = $data;
2822             };
2823             warn "$prefix: $@" if $@;
2824         } elsif ($section eq 'rules') {
2825             my $rule;
2826             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2827             if (my $err = $@) {
2828                 warn "$prefix: $err";
2829                 next;
2830             }
2831             push @{$res->{$section}}, $rule;
2832         } elsif ($section eq 'groups') {
2833             my $rule;
2834             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2835             if (my $err = $@) {
2836                 warn "$prefix: $err";
2837                 next;
2838             }
2839             push @{$res->{$section}->{$group}}, $rule;
2840         } elsif ($section eq 'ipset') {
2841             # we can add single line comments to the end of the rule
2842             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2843
2844             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2845             my $nomatch = $1;
2846             my $cidr = $2;
2847             my $errors;
2848
2849             if ($nomatch && !$feature_ipset_nomatch) {
2850                 $errors->{nomatch} = "nomatch not supported by kernel";
2851             }
2852
2853             eval {
2854                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2855                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2856                 } else {
2857                     $cidr = parse_ip_or_cidr($cidr);
2858                 }
2859             };
2860             if (my $err = $@) {
2861                 chomp $err;
2862                 $errors->{cidr} = $err;
2863             }
2864
2865             if ($cidr =~ m!/0+$!) {
2866                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2867             }
2868
2869             my $entry = { cidr => $cidr };
2870             $entry->{nomatch} = 1 if $nomatch;
2871             $entry->{comment} = $comment if $comment;
2872             $entry->{errors} =  $errors if $errors;
2873
2874             if ($verbose && $errors) {
2875                 warn "$prefix - errors in ipset '$group': $line\n";
2876                 foreach my $p (keys %{$errors}) {
2877                     warn "  $p: $errors->{$p}\n";
2878                 }
2879             }
2880
2881             push @{$res->{$section}->{$group}}, $entry;
2882         } else {
2883             warn "$prefix: skip line - unknown section\n";
2884             next;
2885         }
2886     }
2887
2888     return $res;
2889 }
2890
2891 sub parse_hostfw_config {
2892     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2893
2894     my $empty_conf = { rules => [], options => {}};
2895
2896     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2897 }
2898
2899 sub parse_vmfw_config {
2900     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2901
2902     my $empty_conf = {
2903         rules => [],
2904         options => {},
2905         aliases => {},
2906         ipset => {} ,
2907         ipset_comments => {},
2908     };
2909
2910     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2911 }
2912
2913 sub parse_clusterfw_config {
2914     my ($filename, $fh, $verbose) = @_;
2915
2916     my $section;
2917     my $group;
2918
2919     my $empty_conf = {
2920         rules => [],
2921         options => {},
2922         aliases => {},
2923         groups => {},
2924         group_comments => {},
2925         ipset => {} ,
2926         ipset_comments => {},
2927     };
2928
2929     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2930 }
2931
2932 sub run_locked {
2933     my ($code, @param) = @_;
2934
2935     my $timeout = 10;
2936
2937     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2938
2939     die $@ if $@;
2940
2941     return $res;
2942 }
2943
2944 sub read_local_vm_config {
2945
2946     my $qemu = {};
2947     my $lxc = {};
2948
2949     my $vmdata = { qemu => $qemu, lxc => $lxc };
2950
2951     my $vmlist = PVE::Cluster::get_vmlist();
2952     return $vmdata if !$vmlist || !$vmlist->{ids};
2953     my $ids = $vmlist->{ids};
2954
2955     foreach my $vmid (keys %$ids) {
2956         next if !$vmid; # skip VE0
2957         my $d = $ids->{$vmid};
2958         next if !$d->{node} || $d->{node} ne $nodename;
2959         next if !$d->{type};
2960         if ($d->{type} eq 'qemu') {
2961             if ($have_qemu_server) {
2962                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2963                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2964                     $qemu->{$vmid} = $conf;
2965                 }
2966             }
2967         } elsif ($d->{type} eq 'lxc') {
2968             if ($have_lxc) {
2969                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2970                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2971                     $lxc->{$vmid} = $conf;
2972                 }
2973             }
2974         }
2975     }
2976
2977     return $vmdata;
2978 };
2979
2980 sub load_vmfw_conf {
2981     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2982
2983     my $vmfw_conf = {};
2984
2985     $dir = $pvefw_conf_dir if !defined($dir);
2986
2987     my $filename = "$dir/$vmid.fw";
2988     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2989         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2990         $vmfw_conf->{vmid} = $vmid;
2991     }
2992
2993     return $vmfw_conf;
2994 }
2995
2996 my $format_rules = sub {
2997     my ($rules, $allow_iface) = @_;
2998
2999     my $raw = '';
3000
3001     foreach my $rule (@$rules) {
3002         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3003             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3004             $raw .= uc($rule->{type});
3005             if ($rule->{macro}) {
3006                 $raw .= " $rule->{macro}($rule->{action})";
3007             } else {
3008                 $raw .= " " . $rule->{action};
3009             }
3010             if ($allow_iface && $rule->{iface}) {
3011                 $raw .= " -i $rule->{iface}";
3012             }
3013
3014             if ($rule->{type} ne  'group')  {
3015                 $raw .= " -source $rule->{source}" if $rule->{source};
3016                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3017                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3018                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3019                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3020             }
3021
3022             $raw .= " # " . encode('utf8', $rule->{comment})
3023                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3024             $raw .= "\n";
3025         } else {
3026             die "unknown rule type '$rule->{type}'";
3027         }
3028     }
3029
3030     return $raw;
3031 };
3032
3033 my $format_options = sub {
3034     my ($options) = @_;
3035
3036     my $raw = '';
3037
3038     $raw .= "[OPTIONS]\n\n";
3039     foreach my $opt (keys %$options) {
3040         $raw .= "$opt: $options->{$opt}\n";
3041     }
3042     $raw .= "\n";
3043
3044     return $raw;
3045 };
3046
3047 my $format_aliases = sub {
3048     my ($aliases) = @_;
3049
3050     my $raw = '';
3051
3052     $raw .= "[ALIASES]\n\n";
3053     foreach my $k (keys %$aliases) {
3054         my $e = $aliases->{$k};
3055         $raw .= "$e->{name} $e->{cidr}";
3056         $raw .= " # " . encode('utf8', $e->{comment})
3057             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3058         $raw .= "\n";
3059     }
3060     $raw .= "\n";
3061
3062     return $raw;
3063 };
3064
3065 my $format_ipsets = sub {
3066     my ($fw_conf) = @_;
3067
3068     my $raw = '';
3069
3070     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3071         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3072             my $utf8comment = encode('utf8', $comment);
3073             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3074         } else {
3075             $raw .= "[IPSET $ipset]\n\n";
3076         }
3077         my $options = $fw_conf->{ipset}->{$ipset};
3078
3079         my $nethash = {};
3080         foreach my $entry (@$options) {
3081             $nethash->{$entry->{cidr}} = $entry;
3082         }
3083
3084         foreach my $cidr (sort keys %$nethash) {
3085             my $entry = $nethash->{$cidr};
3086             my $line = $entry->{nomatch} ? '!' : '';
3087             $line .= $entry->{cidr};
3088             $line .= " # " . encode('utf8', $entry->{comment})
3089                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3090             $raw .= "$line\n";
3091         }
3092
3093         $raw .= "\n";
3094     }
3095
3096     return $raw;
3097 };
3098
3099 sub save_vmfw_conf {
3100     my ($vmid, $vmfw_conf) = @_;
3101
3102     my $raw = '';
3103
3104     my $options = $vmfw_conf->{options};
3105     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3106
3107     my $aliases = $vmfw_conf->{aliases};
3108     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3109
3110     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3111
3112     my $rules = $vmfw_conf->{rules} || [];
3113     if ($rules && scalar(@$rules)) {
3114         $raw .= "[RULES]\n\n";
3115         $raw .= &$format_rules($rules, 1);
3116         $raw .= "\n";
3117     }
3118
3119     my $filename = "$pvefw_conf_dir/$vmid.fw";
3120     if ($raw) {
3121         mkdir $pvefw_conf_dir;
3122         PVE::Tools::file_set_contents($filename, $raw);
3123     } else {
3124         unlink $filename;
3125     }
3126 }
3127
3128 sub remove_vmfw_conf {
3129     my ($vmid) = @_;
3130
3131     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3132
3133     unlink $vmfw_conffile;
3134 }
3135
3136 sub clone_vmfw_conf {
3137     my ($vmid, $newid) = @_;
3138
3139     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3140     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3141
3142     if (-f $clonevm_conffile) {
3143         unlink $clonevm_conffile;
3144     }
3145     if (-f $sourcevm_conffile) {
3146         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3147         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3148     }
3149 }
3150
3151 sub read_vm_firewall_configs {
3152     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3153
3154     my $vmfw_configs = {};
3155
3156     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3157         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3158         next if !$vmfw_conf->{options}; # skip if file does not exists
3159         $vmfw_configs->{$vmid} = $vmfw_conf;
3160     }
3161     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3162         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3163         next if !$vmfw_conf->{options}; # skip if file does not exists
3164         $vmfw_configs->{$vmid} = $vmfw_conf;
3165     }
3166
3167     return $vmfw_configs;
3168 }
3169
3170 sub get_option_log_level {
3171     my ($options, $k) = @_;
3172
3173     my $v = $options->{$k};
3174     $v = $default_log_level if !defined($v);
3175
3176     return undef if $v eq '' || $v eq 'nolog';
3177
3178     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3179
3180     return $v if ($v >= 0) && ($v <= 7);
3181
3182     warn "unknown log level ($k = '$v')\n";
3183
3184     return undef;
3185 }
3186
3187 sub generate_std_chains {
3188     my ($ruleset, $options, $ipversion) = @_;
3189
3190     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3191
3192     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3193     my $chain = 'PVEFW-smurflog';
3194     if ( $std_chains->{$chain} ) {
3195         foreach my $r (@{$std_chains->{$chain}}) {
3196           $r->{log} = $loglevel;
3197         }
3198     }
3199
3200     # same as shorewall logflags action.
3201     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3202     $chain = 'PVEFW-logflags';
3203     if ( $std_chains->{$chain} ) {
3204         foreach my $r (@{$std_chains->{$chain}}) {
3205           $r->{log} = $loglevel;
3206         }
3207     }
3208
3209     foreach my $chain (keys %$std_chains) {
3210         ruleset_create_chain($ruleset, $chain);
3211         foreach my $rule (@{$std_chains->{$chain}}) {
3212             if (ref($rule)) {
3213                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3214             } else {
3215                 die "rule $rule as string - should not happen";
3216             }
3217         }
3218     }
3219 }
3220
3221 sub generate_ipset_chains {
3222     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3223
3224     foreach my $ipset (keys %{$ipsets}) {
3225
3226         my $options = $ipsets->{$ipset};
3227
3228         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3229             if (my $ips = $device_ips->{$1}) {
3230                 $options = [@$options, @$ips];
3231             }
3232         }
3233
3234         # remove duplicates
3235         my $nethash = {};
3236         foreach my $entry (@$options) {
3237             next if $entry->{errors}; # skip entries with errors
3238             eval {
3239                 my ($cidr, $ver);
3240                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3241                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3242                 } else {
3243                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3244                 }
3245                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3246                 if ($ver == 6) {
3247                     # ip_compress_address takes an address only, no CIDR
3248                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3249                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3250                     $cidr .= $prefix_len if defined($prefix_len);
3251                     $cidr =~ s|/128$||;
3252                 } else {
3253                     $cidr =~ s|/32$||;
3254                 }
3255
3256                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3257             };
3258             warn $@ if $@;
3259         }
3260
3261         foreach my $ipversion (4, 6) {
3262             my $data = $nethash->{$ipversion};
3263
3264             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3265
3266             my $hashsize = scalar(@$options);
3267             if ($hashsize <= 64) {
3268                 $hashsize = 64;
3269             } else {
3270                 $hashsize = round_powerof2($hashsize);
3271             }
3272
3273             my $family = $ipversion == "6" ? "inet6" : "inet";
3274
3275             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3276
3277             foreach my $cidr (sort keys %$data) {
3278                 my $entry = $data->{$cidr};
3279
3280                 my $cmd = "add $name $cidr";
3281                 if ($entry->{nomatch}) {
3282                     if ($feature_ipset_nomatch) {
3283                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3284                     } else {
3285                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3286                     }
3287                 } else {
3288                     push @{$ipset_ruleset->{$name}}, $cmd;
3289                 }
3290             }
3291         }
3292     }
3293 }
3294
3295 sub round_powerof2 {
3296     my ($int) = @_;
3297
3298     $int--;
3299     $int |= $int >> $_ foreach (1,2,4,8,16);
3300     return ++$int;
3301 }
3302
3303 sub load_clusterfw_conf {
3304     my ($filename, $verbose) = @_;
3305
3306     $filename = $clusterfw_conf_filename if !defined($filename);
3307
3308     my $cluster_conf = {};
3309     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3310         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3311     }
3312
3313     return $cluster_conf;
3314 }
3315
3316 sub save_clusterfw_conf {
3317     my ($cluster_conf) = @_;
3318
3319     my $raw = '';
3320
3321     my $options = $cluster_conf->{options};
3322     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3323
3324     my $aliases = $cluster_conf->{aliases};
3325     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3326
3327     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3328
3329     my $rules = $cluster_conf->{rules};
3330     if ($rules && scalar(@$rules)) {
3331         $raw .= "[RULES]\n\n";
3332         $raw .= &$format_rules($rules, 1);
3333         $raw .= "\n";
3334     }
3335
3336     if ($cluster_conf->{groups}) {
3337         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3338             my $rules = $cluster_conf->{groups}->{$group};
3339             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3340                 my $utf8comment = encode('utf8', $comment);
3341                 $raw .= "[group $group] # $utf8comment\n\n";
3342             } else {
3343                 $raw .= "[group $group]\n\n";
3344             }
3345
3346             $raw .= &$format_rules($rules, 0);
3347             $raw .= "\n";
3348         }
3349     }
3350
3351     if ($raw) {
3352         mkdir $pvefw_conf_dir;
3353         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3354     } else {
3355         unlink $clusterfw_conf_filename;
3356     }
3357 }
3358
3359 sub load_hostfw_conf {
3360     my ($cluster_conf, $filename, $verbose) = @_;
3361
3362     $filename = $hostfw_conf_filename if !defined($filename);
3363
3364     my $hostfw_conf = {};
3365     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3366         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3367     }
3368     return $hostfw_conf;
3369 }
3370
3371 sub save_hostfw_conf {
3372     my ($hostfw_conf) = @_;
3373
3374     my $raw = '';
3375
3376     my $options = $hostfw_conf->{options};
3377     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3378
3379     my $rules = $hostfw_conf->{rules};
3380     if ($rules && scalar(@$rules)) {
3381         $raw .= "[RULES]\n\n";
3382         $raw .= &$format_rules($rules, 1);
3383         $raw .= "\n";
3384     }
3385
3386     if ($raw) {
3387         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3388     } else {
3389         unlink $hostfw_conf_filename;
3390     }
3391 }
3392
3393 sub compile {
3394     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3395
3396     my $vmfw_configs;
3397
3398     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3399     $pve_std_chains = dclone($pve_std_chains_conf);
3400
3401     if ($vmdata) { # test mode
3402         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3403         my $filename = "$testdir/cluster.fw";
3404         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3405
3406         $filename = "$testdir/host.fw";
3407         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3408
3409         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3410     } else { # normal operation
3411         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3412
3413         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3414
3415         $vmdata = read_local_vm_config();
3416         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3417     }
3418
3419     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3420
3421     my $localnet;
3422     if ($cluster_conf->{aliases}->{local_network}) {
3423         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3424     } else {
3425         my $localnet_ver;
3426         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3427
3428         $cluster_conf->{aliases}->{local_network} = {
3429             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3430     }
3431
3432     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3433
3434     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3435     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3436     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3437     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3438
3439     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3440 }
3441
3442 sub compile_iptables_filter {
3443     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3444
3445     my $ruleset = {};
3446
3447     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3448     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3449
3450     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3451
3452     my $hostfw_options = $hostfw_conf->{options} || {};
3453
3454     # fixme: what log level should we use here?
3455     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3456
3457     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3458
3459     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3460     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3461
3462     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3463
3464     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3465     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3466
3467     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3468
3469     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3470
3471     if ($hostfw_enable) {
3472         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3473         warn $@ if $@; # just to be sure - should not happen
3474     }
3475
3476     # generate firewall rules for QEMU VMs
3477     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3478         eval {
3479             my $conf = $vmdata->{qemu}->{$vmid};
3480             my $vmfw_conf = $vmfw_configs->{$vmid};
3481             return if !$vmfw_conf;
3482
3483             foreach my $netid (sort keys %$conf) {
3484                 next if $netid !~ m/^net(\d+)$/;
3485                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3486                 next if !$net->{firewall};
3487                 my $iface = "tap${vmid}i$1";
3488
3489                 my $macaddr = $net->{macaddr};
3490                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3491                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3492                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3493                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3494             }
3495         };
3496         warn $@ if $@; # just to be sure - should not happen
3497     }
3498
3499     # generate firewall rules for LXC containers
3500     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3501         eval {
3502             my $conf = $vmdata->{lxc}->{$vmid};
3503             my $vmfw_conf = $vmfw_configs->{$vmid};
3504             return if !$vmfw_conf;
3505
3506             if ($vmfw_conf->{options}->{enable}) {
3507                 foreach my $netid (sort keys %$conf) {
3508                     next if $netid !~ m/^net(\d+)$/;
3509                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3510                     next if !$net->{firewall};
3511                     my $iface = "veth${vmid}i$1";
3512                     my $macaddr = $net->{hwaddr};
3513                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3514                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3515                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3516                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3517                 }
3518             }
3519         };
3520         warn $@ if $@; # just to be sure - should not happen
3521     }
3522
3523     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3524         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3525     }
3526
3527     return $ruleset;
3528 }
3529
3530 sub mac_to_linklocal {
3531     my ($macaddr) = @_;
3532     my @parts = split(/:/, $macaddr);
3533     # The standard link local address uses the fe80::/64 prefix with the
3534     # modified EUI-64 identifier derived from the MAC address by flipping the
3535     # universal/local bit and inserting FF:FE in the middle.
3536     # See RFC 4291.
3537     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3538     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3539     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3540 }
3541
3542 sub compile_ipsets {
3543     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3544
3545     my $localnet;
3546     if ($cluster_conf->{aliases}->{local_network}) {
3547         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3548     } else {
3549         my $localnet_ver;
3550         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3551
3552         $cluster_conf->{aliases}->{local_network} = {
3553             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3554     }
3555
3556     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3557
3558
3559     my $ipset_ruleset = {};
3560
3561     # generate ipsets for QEMU VMs
3562     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3563         eval {
3564             my $conf = $vmdata->{qemu}->{$vmid};
3565             my $vmfw_conf = $vmfw_configs->{$vmid};
3566             return if !$vmfw_conf;
3567
3568             # When the 'ipfilter' option is enabled every device for which there
3569             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3570             # ipset.
3571             # The reason is that ipfilter ipsets are always filled with standard
3572             # IPv6 link-local filters.
3573             my $ipsets = $vmfw_conf->{ipset};
3574             my $implicit_sets = {};
3575
3576             my $device_ips = {};
3577             foreach my $netid (keys %$conf) {
3578                 next if $netid !~ m/^net(\d+)$/;
3579                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3580                 next if !$net->{firewall};
3581
3582                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3583                     $implicit_sets->{"ipfilter-$netid"} = [];
3584                 }
3585
3586                 my $macaddr = $net->{macaddr};
3587                 my $linklocal = mac_to_linklocal($macaddr);
3588                 $device_ips->{$netid} = [
3589                     { cidr => $linklocal },
3590                     { cidr => 'fe80::/10', nomatch => 1 }
3591                 ];
3592             }
3593
3594             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3595             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3596         };
3597         warn $@ if $@; # just to be sure - should not happen
3598     }
3599
3600     # generate firewall rules for LXC containers
3601     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3602         eval {
3603             my $conf = $vmdata->{lxc}->{$vmid};
3604             my $vmfw_conf = $vmfw_configs->{$vmid};
3605             return if !$vmfw_conf;
3606
3607             # When the 'ipfilter' option is enabled every device for which there
3608             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3609             # ipset.
3610             # The reason is that ipfilter ipsets are always filled with standard
3611             # IPv6 link-local filters, as well as the IP addresses configured
3612             # for the container.
3613             my $ipsets = $vmfw_conf->{ipset};
3614             my $implicit_sets = {};
3615
3616             my $device_ips = {};
3617             foreach my $netid (keys %$conf) {
3618                 next if $netid !~ m/^net(\d+)$/;
3619                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3620                 next if !$net->{firewall};
3621
3622                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3623                     $implicit_sets->{"ipfilter-$netid"} = [];
3624                 }
3625
3626                 my $macaddr = $net->{hwaddr};
3627                 my $linklocal = mac_to_linklocal($macaddr);
3628                 my $set = $device_ips->{$netid} = [
3629                     { cidr => $linklocal },
3630                     { cidr => 'fe80::/10', nomatch => 1 }
3631                 ];
3632                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3633                     push @$set, { cidr => $1 };
3634                 }
3635                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3636                     push @$set, { cidr => $1 };
3637                 }
3638             }
3639
3640             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3641             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3642         };
3643         warn $@ if $@; # just to be sure - should not happen
3644     }
3645
3646     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3647
3648     return $ipset_ruleset;
3649 }
3650
3651 sub compile_ebtables_filter {
3652     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3653
3654     if (!($cluster_conf->{options}->{ebtables_enable} // 1)) {
3655         return {};
3656     }
3657
3658     my $ruleset = {};
3659
3660     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3661
3662     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3663     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3664     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3665     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3666     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3667
3668     # generate firewall rules for QEMU VMs
3669     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3670         eval {
3671             my $conf = $vmdata->{qemu}->{$vmid};
3672             my $vmfw_conf = $vmfw_configs->{$vmid};
3673             return if !$vmfw_conf;
3674
3675             foreach my $netid (keys %$conf) {
3676                 next if $netid !~ m/^net(\d+)$/;
3677                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3678                 next if !$net->{firewall};
3679                 my $iface = "tap${vmid}i$1";
3680                 my $macaddr = $net->{macaddr};
3681
3682                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3683
3684             }
3685         };
3686         warn $@ if $@; # just to be sure - should not happen
3687     }
3688
3689     # generate firewall rules for LXC containers
3690     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3691         eval {
3692             my $conf = $vmdata->{lxc}->{$vmid};
3693
3694             my $vmfw_conf = $vmfw_configs->{$vmid};
3695             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3696
3697             foreach my $netid (keys %$conf) {
3698                 next if $netid !~ m/^net(\d+)$/;
3699                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3700                 next if !$net->{firewall};
3701                 my $iface = "veth${vmid}i$1";
3702                 my $macaddr = $net->{hwaddr};
3703                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3704             }
3705         };
3706         warn $@ if $@; # just to be sure - should not happen
3707     }
3708
3709     return $ruleset;
3710 }
3711
3712 sub generate_tap_layer2filter {
3713     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
3714     my $options = $vmfw_conf->{options};
3715
3716     my $tapchain = $iface."-OUT";
3717
3718     # ebtables remove zeros from mac pairs
3719     $macaddr =~ s/0([0-9a-f])/$1/ig;
3720     $macaddr = lc($macaddr);
3721
3722     ruleset_create_chain($ruleset, $tapchain);
3723
3724     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3725             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3726     }
3727
3728     if (defined($options->{layer2_protocols})){
3729         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3730             ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT');
3731         }
3732         ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
3733     } else {
3734         ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3735     }
3736
3737     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3738 }
3739
3740 # the parameter $change_only_regex changes two things if defined:
3741 # * all chains not matching it will be left intact
3742 # * both the $active_chains hash and the returned status_hash have different
3743 #   structure (they contain a key named 'rules').
3744 sub get_ruleset_status {
3745     my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
3746
3747     my $statushash = {};
3748
3749     foreach my $chain (sort keys %$ruleset) {
3750         my $rules = $ruleset->{$chain};
3751         my $sig = &$digest_fn($rules);
3752         my $oldsig;
3753
3754         $statushash->{$chain}->{sig} = $sig;
3755         if (defined($change_only_regex)) {
3756             $oldsig = $active_chains->{$chain}->{sig};
3757             $statushash->{$chain}->{rules} = $rules;
3758         } else {
3759             $oldsig = $active_chains->{$chain};
3760         }
3761         if (!defined($oldsig)) {
3762             $statushash->{$chain}->{action} = 'create';
3763         } else {
3764             if ($oldsig eq $sig) {
3765                 $statushash->{$chain}->{action} = 'exists';
3766             } else {
3767                 $statushash->{$chain}->{action} = 'update';
3768             }
3769         }
3770         if ($verbose) {
3771             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3772             foreach my $cmd (@{$rules}) {
3773                 print "\t$cmd\n";
3774             }
3775         }
3776     }
3777
3778     foreach my $chain (sort keys %$active_chains) {
3779         next if defined($ruleset->{$chain});
3780         my $action = 'delete';
3781         if (defined($change_only_regex)) {
3782             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3783             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3784         }
3785         my $sig = $active_chains->{$chain}->{sig};
3786         $statushash->{$chain}->{action} = $action;
3787         $statushash->{$chain}->{sig} = $sig;
3788         print "$action $chain ($sig)\n" if $verbose;
3789     }
3790
3791     return $statushash;
3792 }
3793
3794 sub print_sig_rule {
3795     my ($chain, $sig) = @_;
3796
3797     # We just use this to store a SHA1 checksum used to detect changes
3798     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3799 }
3800
3801 sub get_ruleset_cmdlist {
3802     my ($ruleset, $verbose, $iptablescmd) = @_;
3803
3804     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3805
3806     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3807     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3808
3809     # create missing chains first
3810     foreach my $chain (sort keys %$ruleset) {
3811         my $stat = $statushash->{$chain};
3812         die "internal error" if !$stat;
3813         next if $stat->{action} ne 'create';
3814
3815         $cmdlist .= ":$chain - [0:0]\n";
3816     }
3817
3818     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3819         my $chain = "PVEFW-$h";
3820         if ($ruleset->{$chain} && !$hooks->{$h}) {
3821             $cmdlist .= "-A $h -j $chain\n";
3822         }
3823     }
3824
3825     foreach my $chain (sort keys %$ruleset) {
3826         my $stat = $statushash->{$chain};
3827         die "internal error" if !$stat;
3828
3829         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3830             $cmdlist .= "-F $chain\n";
3831             foreach my $cmd (@{$ruleset->{$chain}}) {
3832                 $cmdlist .= "$cmd\n";
3833             }
3834             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3835         } elsif ($stat->{action} eq 'delete') {
3836             die "internal error"; # this should not happen
3837         } elsif ($stat->{action} eq 'exists') {
3838             # do nothing
3839         } else {
3840             die "internal error - unknown status '$stat->{action}'";
3841         }
3842     }
3843
3844     foreach my $chain (keys %$statushash) {
3845         next if $statushash->{$chain}->{action} ne 'delete';
3846         $cmdlist .= "-F $chain\n";
3847     }
3848     foreach my $chain (keys %$statushash) {
3849         next if $statushash->{$chain}->{action} ne 'delete';
3850         next if $chain eq 'PVEFW-INPUT';
3851         next if $chain eq 'PVEFW-OUTPUT';
3852         next if $chain eq 'PVEFW-FORWARD';
3853         $cmdlist .= "-X $chain\n";
3854     }
3855
3856     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3857
3858     $cmdlist .= "COMMIT\n";
3859
3860     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3861 }
3862
3863 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tab|veth)\d+i\d+-(?:IN|OUT)/;
3864
3865 sub get_ebtables_cmdlist {
3866     my ($ruleset, $verbose) = @_;
3867
3868     my $changes = 0;
3869     my $cmdlist = "*filter\n";
3870
3871     my $active_chains = ebtables_get_chains();
3872     my $statushash = get_ruleset_status($ruleset, $active_chains,
3873                                         \&iptables_chain_digest, $verbose,
3874                                         $pve_ebtables_chainname_regex);
3875
3876     # create chains first and make sure PVE rules are evaluated if active
3877     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3878     my $pve_include = 0;
3879     foreach my $chain (sort keys %$statushash) {
3880         next if ($statushash->{$chain}->{action} eq 'delete');
3881         $cmdlist .= ":$chain ACCEPT\n";
3882         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3883     }
3884
3885     foreach my $chain (sort keys %$statushash) {
3886         my $stat = $statushash->{$chain};
3887         next if ($stat->{action} eq 'delete');
3888         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3889
3890         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3891             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3892                 next if ! $pve_include;
3893                 $pve_include = 0;
3894             }
3895             $cmdlist .= "$cmd\n";
3896         }
3897     }
3898     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
3899
3900     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3901 }
3902
3903 sub get_ipset_cmdlist {
3904     my ($ruleset, $verbose) = @_;
3905
3906     my $cmdlist = "";
3907
3908     my $delete_cmdlist = "";
3909
3910     my $active_chains = ipset_get_chains();
3911     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3912
3913     # remove stale _swap chains
3914     foreach my $chain (keys %$active_chains) {
3915         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3916             $cmdlist .= "destroy $chain\n";
3917         }
3918     }
3919
3920     foreach my $chain (keys %$ruleset) {
3921         my $stat = $statushash->{$chain};
3922         die "internal error" if !$stat;
3923
3924         if ($stat->{action} eq 'create') {
3925             foreach my $cmd (@{$ruleset->{$chain}}) {
3926                 $cmdlist .= "$cmd\n";
3927             }
3928         }
3929     }
3930
3931     foreach my $chain (keys %$ruleset) {
3932         my $stat = $statushash->{$chain};
3933         die "internal error" if !$stat;
3934
3935         if ($stat->{action} eq 'update') {
3936             my $chain_swap = $chain."_swap";
3937
3938             foreach my $cmd (@{$ruleset->{$chain}}) {
3939                 $cmd =~ s/$chain/$chain_swap/;
3940                 $cmdlist .= "$cmd\n";
3941             }
3942             $cmdlist .= "swap $chain_swap $chain\n";
3943             $cmdlist .= "flush $chain_swap\n";
3944             $cmdlist .= "destroy $chain_swap\n";
3945         }
3946     }
3947
3948      # the remove unused chains
3949     foreach my $chain (keys %$statushash) {
3950         next if $statushash->{$chain}->{action} ne 'delete';
3951
3952         $delete_cmdlist .= "flush $chain\n";
3953         $delete_cmdlist .= "destroy $chain\n";
3954     }
3955
3956     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3957
3958     return ($cmdlist, $delete_cmdlist, $changes);
3959 }
3960
3961 sub apply_ruleset {
3962     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
3963
3964     enable_bridge_firewall();
3965
3966     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3967         get_ipset_cmdlist($ipset_ruleset, $verbose);
3968
3969     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3970     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3971     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
3972
3973     if ($verbose) {
3974         if ($ipset_changes) {
3975             print "ipset changes:\n";
3976             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3977             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3978         }
3979
3980         if ($changes) {
3981             print "iptables changes:\n";
3982             print $cmdlist;
3983         }
3984
3985         if ($changesv6) {
3986             print "ip6tables changes:\n";
3987             print $cmdlistv6;
3988         }
3989
3990         if ($ebtables_changes) {
3991             print "ebtables changes:\n";
3992             print $ebtables_cmdlist;
3993         }
3994     }
3995
3996     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3997     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3998
3999     ipset_restore_cmdlist($ipset_create_cmdlist);
4000
4001     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4002     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4003
4004     iptables_restore_cmdlist($cmdlist);
4005
4006     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4007     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4008
4009     ip6tables_restore_cmdlist($cmdlistv6);
4010
4011     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4012     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4013
4014     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4015
4016     ebtables_restore_cmdlist($ebtables_cmdlist);
4017
4018     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4019     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4020
4021     # test: re-read status and check if everything is up to date
4022     my $active_chains = iptables_get_chains();
4023     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
4024
4025     my $errors;
4026     foreach my $chain (sort keys %$ruleset) {
4027         my $stat = $statushash->{$chain};
4028         if ($stat->{action} ne 'exists') {
4029             warn "unable to update chain '$chain'\n";
4030             $errors = 1;
4031         }
4032     }
4033
4034     my $active_chainsv6 = iptables_get_chains("ip6tables");
4035     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
4036
4037     foreach my $chain (sort keys %$rulesetv6) {
4038         my $stat = $statushashv6->{$chain};
4039         if ($stat->{action} ne 'exists') {
4040             warn "unable to update chain '$chain'\n";
4041             $errors = 1;
4042         }
4043     }
4044
4045     my $active_ebtables_chains = ebtables_get_chains();
4046     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4047                                 $active_ebtables_chains, \&iptables_chain_digest,
4048                                 0, $pve_ebtables_chainname_regex);
4049
4050     foreach my $chain (sort keys %$ebtables_ruleset) {
4051         my $stat = $ebtables_statushash->{$chain};
4052         if ($stat->{action} ne 'exists') {
4053             warn "ebtables : unable to update chain '$chain'\n";
4054             $errors = 1;
4055         }
4056     }
4057
4058     die "unable to apply firewall changes\n" if $errors;
4059
4060     update_nf_conntrack_max($hostfw_conf);
4061
4062     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4063
4064 }
4065
4066 sub update_nf_conntrack_max {
4067     my ($hostfw_conf) = @_;
4068
4069     my $max = 65536; # reasonable default
4070
4071     my $options = $hostfw_conf->{options} || {};
4072
4073     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4074         $max = $options->{nf_conntrack_max};
4075         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4076     }
4077
4078     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4079     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4080
4081     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4082
4083     if ($current != $max) {
4084         my $hashsize = int($max/4);
4085         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4086         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4087     }
4088 }
4089
4090 sub update_nf_conntrack_tcp_timeout_established {
4091     my ($hostfw_conf) = @_;
4092
4093     my $options = $hostfw_conf->{options} || {};
4094
4095     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4096
4097     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4098 }
4099
4100 sub remove_pvefw_chains {
4101
4102     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4103     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4104     PVE::Firewall::remove_pvefw_chains_ipset();
4105
4106 }
4107
4108 sub remove_pvefw_chains_iptables {
4109     my ($iptablescmd) = @_;
4110
4111     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4112     my $cmdlist = "*filter\n";
4113
4114     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4115         if ($hooks->{$h}) {
4116             $cmdlist .= "-D $h -j PVEFW-$h\n";
4117         }
4118     }
4119
4120     foreach my $chain (keys %$chash) {
4121         $cmdlist .= "-F $chain\n";
4122     }
4123
4124     foreach my $chain (keys %$chash) {
4125         $cmdlist .= "-X $chain\n";
4126     }
4127     $cmdlist .= "COMMIT\n";
4128
4129     if($iptablescmd eq "ip6tables") {
4130         ip6tables_restore_cmdlist($cmdlist);
4131     } else {
4132         iptables_restore_cmdlist($cmdlist);
4133     }
4134 }
4135
4136 sub remove_pvefw_chains_ipset {
4137
4138     my $ipset_chains = ipset_get_chains();
4139
4140     my $cmdlist = "";
4141
4142     foreach my $chain (keys %$ipset_chains) {
4143         $cmdlist .= "flush $chain\n";
4144         $cmdlist .= "destroy $chain\n";
4145     }
4146
4147     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4148 }
4149
4150 sub init {
4151     my $cluster_conf = load_clusterfw_conf();
4152     my $cluster_options = $cluster_conf->{options};
4153     my $enable = $cluster_options->{enable};
4154
4155     return if !$enable;
4156
4157     # load required modules here
4158 }
4159
4160 sub update {
4161     my $code = sub {
4162
4163         my $cluster_conf = load_clusterfw_conf();
4164         my $cluster_options = $cluster_conf->{options};
4165
4166         if (!$cluster_options->{enable}) {
4167             PVE::Firewall::remove_pvefw_chains();
4168             return;
4169         }
4170
4171         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4172
4173         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4174
4175         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4176     };
4177
4178     run_locked($code);
4179 }
4180
4181 1;