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     ebtables => {
1184         description => "Enable ebtables rules cluster wide.",
1185         type => 'boolean',
1186         default => 1,
1187         optional => 1,
1188     },
1189     policy_in => {
1190         description => "Input policy.",
1191         type => 'string',
1192         optional => 1,
1193         enum => ['ACCEPT', 'REJECT', 'DROP'],
1194     },
1195     policy_out => {
1196         description => "Output policy.",
1197         type => 'string',
1198         optional => 1,
1199         enum => ['ACCEPT', 'REJECT', 'DROP'],
1200     },
1201 };
1202
1203 our $host_option_properties = {
1204     enable => {
1205         description => "Enable host firewall rules.",
1206         type => 'boolean',
1207         optional => 1,
1208     },
1209     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1210         description => "Log level for incoming traffic." }),
1211     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1212         description => "Log level for outgoing traffic." }),
1213     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1214         description => "Log level for illegal tcp flags filter." }),
1215     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1216         description => "Log level for SMURFS filter." }),
1217     nosmurfs => {
1218         description => "Enable SMURFS filter.",
1219         type => 'boolean',
1220         optional => 1,
1221     },
1222     tcpflags => {
1223         description => "Filter illegal combinations of TCP flags.",
1224         type => 'boolean',
1225         optional => 1,
1226     },
1227     nf_conntrack_max => {
1228         description => "Maximum number of tracked connections.",
1229         type => 'integer',
1230         optional => 1,
1231         minimum => 32768,
1232     },
1233     nf_conntrack_tcp_timeout_established => {
1234         description => "Conntrack established timeout.",
1235         type => 'integer',
1236         optional => 1,
1237         minimum => 7875,
1238     },
1239     ndp => {
1240         description => "Enable NDP.",
1241         type => 'boolean',
1242         optional => 1,
1243     },
1244 };
1245
1246 our $vm_option_properties = {
1247     enable => {
1248         description => "Enable/disable firewall rules.",
1249         type => 'boolean',
1250         optional => 1,
1251     },
1252     macfilter => {
1253         description => "Enable/disable MAC address filter.",
1254         type => 'boolean',
1255         optional => 1,
1256     },
1257     dhcp => {
1258         description => "Enable DHCP.",
1259         type => 'boolean',
1260         optional => 1,
1261     },
1262     ndp => {
1263         description => "Enable NDP.",
1264         type => 'boolean',
1265         optional => 1,
1266     },
1267     radv => {
1268         description => "Allow sending Router Advertisement.",
1269         type => 'boolean',
1270         optional => 1,
1271     },
1272     ipfilter => {
1273         description => "Enable default IP filters. " .
1274            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1275            "for every interface. Such ipsets implicitly contain sane default " .
1276            "restrictions such as restricting IPv6 link local addresses to " .
1277            "the one derived from the interface's MAC address. For containers " .
1278            "the configured IP addresses will be implicitly added.",
1279         type => 'boolean',
1280         optional => 1,
1281     },
1282     policy_in => {
1283         description => "Input policy.",
1284         type => 'string',
1285         optional => 1,
1286         enum => ['ACCEPT', 'REJECT', 'DROP'],
1287     },
1288     policy_out => {
1289         description => "Output policy.",
1290         type => 'string',
1291         optional => 1,
1292         enum => ['ACCEPT', 'REJECT', 'DROP'],
1293     },
1294     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1295         description => "Log level for incoming traffic." }),
1296     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1297         description => "Log level for outgoing traffic." }),
1298
1299 };
1300
1301
1302 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.";
1303
1304 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.";
1305
1306 my $rule_properties = {
1307     pos => {
1308         description => "Update rule at position <pos>.",
1309         type => 'integer',
1310         minimum => 0,
1311         optional => 1,
1312     },
1313     digest => get_standard_option('pve-config-digest'),
1314     type => {
1315         description => "Rule type.",
1316         type => 'string',
1317         optional => 1,
1318         enum => ['in', 'out', 'group'],
1319     },
1320     action => {
1321         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1322         type => 'string',
1323         optional => 1,
1324         pattern => $security_group_name_pattern,
1325         maxLength => 20,
1326         minLength => 2,
1327     },
1328     macro => {
1329         description => "Use predefined standard macro.",
1330         type => 'string',
1331         optional => 1,
1332         maxLength => 128,
1333     },
1334     iface => get_standard_option('pve-iface', {
1335         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.",
1336         optional => 1
1337     }),
1338     source => {
1339         description => "Restrict packet source address. $addr_list_descr",
1340         type => 'string', format => 'pve-fw-addr-spec',
1341         optional => 1,
1342     },
1343     dest => {
1344         description => "Restrict packet destination address. $addr_list_descr",
1345         type => 'string', format => 'pve-fw-addr-spec',
1346         optional => 1,
1347     },
1348     proto => {
1349         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1350         type => 'string', format => 'pve-fw-protocol-spec',
1351         optional => 1,
1352     },
1353     enable => {
1354         description => "Flag to enable/disable a rule.",
1355         type => 'integer',
1356         minimum => 0,
1357         optional => 1,
1358     },
1359     sport => {
1360         description => "Restrict TCP/UDP source port. $port_descr",
1361         type => 'string', format => 'pve-fw-sport-spec',
1362         optional => 1,
1363     },
1364     dport => {
1365         description => "Restrict TCP/UDP destination port. $port_descr",
1366         type => 'string', format => 'pve-fw-dport-spec',
1367         optional => 1,
1368     },
1369     comment => {
1370         description => "Descriptive comment.",
1371         type => 'string',
1372         optional => 1,
1373     },
1374 };
1375
1376 sub add_rule_properties {
1377     my ($properties) = @_;
1378
1379     foreach my $k (keys %$rule_properties) {
1380         my $h = $rule_properties->{$k};
1381         # copy data, so that we can modify later without side effects
1382         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1383     }
1384
1385     return $properties;
1386 }
1387
1388 sub delete_rule_properties {
1389     my ($rule, $delete_str) = @_;
1390
1391     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1392         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1393             if !defined($rule_properties->{$opt});
1394         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1395             if $opt eq 'type' || $opt eq 'action';
1396         delete $rule->{$opt};
1397     }
1398
1399     return $rule;
1400 }
1401
1402 my $apply_macro = sub {
1403     my ($macro_name, $param, $verify, $ipversion) = @_;
1404
1405     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1406     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1407
1408     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1409         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1410     }
1411
1412     # skip macros which are specific to another ipversion
1413     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1414         return if $ipversion != $required;
1415     }
1416
1417     my $rules = [];
1418
1419     foreach my $templ (@$macro_rules) {
1420         my $rule = {};
1421         my $param_used = {};
1422         foreach my $k (keys %$templ) {
1423             my $v = $templ->{$k};
1424             if ($v eq 'PARAM') {
1425                 $v = $param->{$k};
1426                 $param_used->{$k} = 1;
1427             } elsif ($v eq 'DEST') {
1428                 $v = $param->{dest};
1429                 $param_used->{dest} = 1;
1430             } elsif ($v eq 'SOURCE') {
1431                 $v = $param->{source};
1432                 $param_used->{source} = 1;
1433             }
1434
1435             if (!defined($v)) {
1436                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1437                 raise_param_exc({ macro => $msg }) if $verify;
1438                 die "$msg\n";
1439             }
1440             $rule->{$k} = $v;
1441         }
1442         foreach my $k (keys %$param) {
1443             next if $k eq 'macro';
1444             next if !defined($param->{$k});
1445             next if $param_used->{$k};
1446             if (defined($rule->{$k})) {
1447                 if ($rule->{$k} ne $param->{$k}) {
1448                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1449                     raise_param_exc({ $k => $msg }) if $verify;
1450                     die "$msg\n";
1451                 }
1452             } else {
1453                 $rule->{$k} = $param->{$k};
1454             }
1455         }
1456         push @$rules, $rule;
1457     }
1458
1459     return $rules;
1460 };
1461
1462 my $rule_env_iface_lookup = {
1463     'ct' => 1,
1464     'vm' => 1,
1465     'group' => 0,
1466     'cluster' => 1,
1467     'host' => 1,
1468 };
1469
1470 sub verify_rule {
1471     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1472
1473     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1474
1475     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1476     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1477
1478     my $errors = $rule->{errors} || {};
1479
1480     my $error_count = 0;
1481
1482     my $add_error = sub {
1483         my ($param, $msg)  = @_;
1484         chomp $msg;
1485         raise_param_exc({ $param => $msg }) if !$noerr;
1486         $error_count++;
1487         $errors->{$param} = $msg if !$errors->{$param};
1488     };
1489
1490     my $ipversion;
1491     my $set_ip_version = sub {
1492         my $vers = shift;
1493         if ($vers) {
1494             die "detected mixed ipv4/ipv6 adresses in rule\n"
1495                 if $ipversion && ($vers != $ipversion);
1496             $ipversion = $vers;
1497         }
1498     };
1499
1500     my $check_ipset_or_alias_property = sub {
1501         my ($name, $expected_ipversion) = @_;
1502
1503         if (my $value = $rule->{$name}) {
1504             if ($value =~ m/^\+/) {
1505                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1506                     &$add_error($name, "no such ipset '$1'")
1507                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1508
1509                 } else {
1510                     &$add_error($name, "invalid ipset name '$value'");
1511                 }
1512             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1513                 my $alias = lc($value);
1514                 &$add_error($name, "no such alias '$value'")
1515                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1516                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1517                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1518
1519                 &$set_ip_version($e->{ipversion});
1520             }
1521         }
1522     };
1523
1524     my $type = $rule->{type};
1525     my $action = $rule->{action};
1526
1527     &$add_error('type', "missing property") if !$type;
1528     &$add_error('action', "missing property") if !$action;
1529
1530     if ($type) {
1531         if ($type eq  'in' || $type eq 'out') {
1532             &$add_error('action', "unknown action '$action'")
1533                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1534         } elsif ($type eq 'group') {
1535             &$add_error('type', "security groups not allowed")
1536                 if !$allow_groups;
1537             &$add_error('action', "invalid characters in security group name")
1538                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1539         } else {
1540             &$add_error('type', "unknown rule type '$type'");
1541         }
1542     }
1543
1544     if ($rule->{iface}) {
1545         &$add_error('type', "parameter -i not allowed for this rule type")
1546             if !$allow_iface;
1547         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1548         &$add_error('iface', $@) if $@;
1549         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1550             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1551                 if $rule->{iface} !~  m/^net(\d+)$/;
1552         }
1553     }
1554
1555     if ($rule->{macro}) {
1556         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1557             $rule->{macro} = $preferred_name;
1558         } else {
1559             &$add_error('macro', "unknown macro '$rule->{macro}'");
1560         }
1561     }
1562
1563     if ($rule->{proto}) {
1564         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1565         &$add_error('proto', $@) if $@;
1566         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1567         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1568     }
1569
1570     if ($rule->{dport}) {
1571         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1572         &$add_error('dport', $@) if $@;
1573         my $proto = $rule->{proto};
1574         &$add_error('proto', "missing property - 'dport' requires this property")
1575             if !$proto;
1576         &$add_error('dport', "protocol '$proto' does not support ports")
1577             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1578                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1579     }
1580
1581     if ($rule->{sport}) {
1582         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1583         &$add_error('sport', $@) if $@;
1584         my $proto = $rule->{proto};
1585         &$add_error('proto', "missing property - 'sport' requires this property")
1586             if !$proto;
1587         &$add_error('sport', "protocol '$proto' does not support ports")
1588             if !$PROTOCOLS_WITH_PORTS->{$proto};
1589     }
1590
1591     if ($rule->{source}) {
1592         eval {
1593             my $source_ipversion = parse_address_list($rule->{source});
1594             &$set_ip_version($source_ipversion);
1595         };
1596         &$add_error('source', $@) if $@;
1597         &$check_ipset_or_alias_property('source', $ipversion);
1598     }
1599
1600     if ($rule->{dest}) {
1601         eval {
1602             my $dest_ipversion = parse_address_list($rule->{dest});
1603             &$set_ip_version($dest_ipversion);
1604         };
1605         &$add_error('dest', $@) if $@;
1606         &$check_ipset_or_alias_property('dest', $ipversion);
1607     }
1608
1609     $rule->{ipversion} = $ipversion if $ipversion;
1610
1611     if ($rule->{macro} && !$error_count) {
1612         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1613         if (my $err = $@) {
1614             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1615                 my $eh = $err->{errors};
1616                 foreach my $p (keys %$eh) {
1617                     &$add_error($p, $eh->{$p});
1618                 }
1619             } else {
1620                 &$add_error('macro', "$err");
1621             }
1622         }
1623     }
1624
1625     $rule->{errors} = $errors if $error_count;
1626
1627     return $rule;
1628 }
1629
1630 sub copy_rule_data {
1631     my ($rule, $param) = @_;
1632
1633     foreach my $k (keys %$rule_properties) {
1634         if (defined(my $v = $param->{$k})) {
1635             if ($v eq '' || $v eq '-') {
1636                 delete $rule->{$k};
1637             } else {
1638                 $rule->{$k} = $v;
1639             }
1640         }
1641     }
1642
1643     return $rule;
1644 }
1645
1646 sub rules_modify_permissions {
1647     my ($rule_env) = @_;
1648
1649     if ($rule_env eq 'host') {
1650         return {
1651             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1652         };
1653     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1654         return {
1655             check => ['perm', '/', [ 'Sys.Modify' ]],
1656         };
1657     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1658         return {
1659             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1660         }
1661     }
1662
1663     return undef;
1664 }
1665
1666 sub rules_audit_permissions {
1667     my ($rule_env) = @_;
1668
1669     if ($rule_env eq 'host') {
1670         return {
1671             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1672         };
1673     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1674         return {
1675             check => ['perm', '/', [ 'Sys.Audit' ]],
1676         };
1677     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1678         return {
1679             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1680         }
1681     }
1682
1683     return undef;
1684 }
1685
1686 # core functions
1687 my $bridge_firewall_enabled = 0;
1688
1689 sub enable_bridge_firewall {
1690
1691     return if $bridge_firewall_enabled; # only once
1692
1693     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1694     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1695
1696     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1697     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1698
1699     $bridge_firewall_enabled = 1;
1700 }
1701
1702 sub iptables_restore_cmdlist {
1703     my ($cmdlist) = @_;
1704
1705     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1706 }
1707
1708 sub ip6tables_restore_cmdlist {
1709     my ($cmdlist) = @_;
1710
1711     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1712 }
1713
1714 sub ipset_restore_cmdlist {
1715     my ($cmdlist) = @_;
1716
1717     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1718 }
1719
1720 sub ebtables_restore_cmdlist {
1721     my ($cmdlist) = @_;
1722
1723     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1724 }
1725
1726 sub iptables_get_chains {
1727     my ($iptablescmd) = @_;
1728
1729     $iptablescmd = "iptables" if !$iptablescmd;
1730
1731     my $res = {};
1732
1733     # check what chains we want to track
1734     my $is_pvefw_chain = sub {
1735         my $name = shift;
1736
1737         return 1 if $name =~ m/^PVEFW-\S+$/;
1738
1739         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1740
1741         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1742
1743         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1744         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1745
1746         return undef;
1747     };
1748
1749     my $table = '';
1750
1751     my $hooks = {};
1752
1753     my $parser = sub {
1754         my $line = shift;
1755
1756         return if $line =~ m/^#/;
1757         return if $line =~ m/^\s*$/;
1758
1759         if ($line =~ m/^\*(\S+)$/) {
1760             $table = $1;
1761             return;
1762         }
1763
1764         return if $table ne 'filter';
1765
1766         if ($line =~ m/^:(\S+)\s/) {
1767             my $chain = $1;
1768             return if !&$is_pvefw_chain($chain);
1769             $res->{$chain} = "unknown";
1770         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1771             my ($chain, $sig) = ($1, $2);
1772             return if !&$is_pvefw_chain($chain);
1773             $res->{$chain} = $sig;
1774         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1775             $hooks->{$1} = 1;
1776         } else {
1777             # simply ignore the rest
1778             return;
1779         }
1780     };
1781
1782     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1783
1784     return wantarray ? ($res, $hooks) : $res;
1785 }
1786
1787 sub iptables_chain_digest {
1788     my ($rules) = @_;
1789     my $digest = Digest::SHA->new('sha1');
1790     foreach my $rule (@$rules) { # order is important
1791         $digest->add($rule);
1792     }
1793     return $digest->b64digest;
1794 }
1795
1796 sub ipset_chain_digest {
1797     my ($rules) = @_;
1798
1799     my $digest = Digest::SHA->new('sha1');
1800     foreach my $rule (sort @$rules) { # note: sorted
1801         $digest->add($rule);
1802     }
1803     return $digest->b64digest;
1804 }
1805
1806 sub ipset_get_chains {
1807
1808     my $res = {};
1809     my $chains = {};
1810
1811     my $parser = sub {
1812         my $line = shift;
1813
1814         return if $line =~ m/^#/;
1815         return if $line =~ m/^\s*$/;
1816         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1817             my $chain = $1;
1818             $line =~ s/\s+$//; # delete trailing white space
1819             push @{$chains->{$chain}}, $line;
1820         } else {
1821             # simply ignore the rest
1822             return;
1823         }
1824     };
1825
1826     run_command("/sbin/ipset save", outfunc => $parser);
1827
1828     # compute digest for each chain
1829     foreach my $chain (keys %$chains) {
1830         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1831     }
1832
1833     return $res;
1834 }
1835
1836 sub ebtables_get_chains {
1837
1838     my $res = {};
1839     my $chains = {};
1840     my $parser = sub {
1841         my $line = shift;
1842         return if $line =~ m/^#/;
1843         return if $line =~ m/^\s*$/;
1844         if ($line =~ m/^:(\S+)\s\S+$/) {
1845             # Make sure we know chains exist even if they're empty.
1846             $chains->{$1} //= [];
1847         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1848             my $chain = $1;
1849             $line =~ s/\s+$//;
1850             push @{$chains->{$chain}}, $line;
1851         } else {
1852             # simply ignore the rest
1853             return;
1854         }
1855     };
1856
1857     run_command("/sbin/ebtables-save", outfunc => $parser);
1858     # compute digest for each chain and store rules as well
1859     foreach my $chain (keys %$chains) {
1860         $res->{$chain}->{rules} = $chains->{$chain};
1861         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1862     }
1863     return $res;
1864 }
1865
1866 # substitude action of rule according to action hash
1867 sub rule_substitude_action {
1868     my ($rule, $actions) = @_;
1869
1870     if (my $action = $rule->{action}) {
1871         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1872     }
1873 }
1874
1875 # generate a src or dst match
1876 # $dir(ection) is either d or s
1877 sub ipt_gen_src_or_dst_match {
1878     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1879
1880     my $srcdst;
1881     if ($dir eq 's') {
1882         $srcdst = "src";
1883     } elsif ($dir eq 'd') {
1884         $srcdst = "dst";
1885     } else {
1886         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1887     }
1888
1889     my $match;
1890     if ($adr =~ m/^\+/) {
1891         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1892             my $name = $1;
1893             my $ipset_chain;
1894             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1895                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1896             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1897                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1898             } else {
1899                 die "no such ipset '$name'\n";
1900             }
1901             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1902         } else {
1903             die "invalid security group name '$adr'\n";
1904         }
1905     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1906         my $alias = lc($adr);
1907         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1908         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1909         die "no such alias '$adr'\n" if !$e;
1910         $match = "-${dir} $e->{cidr}";
1911     } elsif ($adr =~ m/\-/){
1912         $match = "-m iprange --${srcdst}-range $adr";
1913     } else {
1914         $match = "-${dir} $adr";
1915     }
1916
1917     return $match;
1918 }
1919
1920 # convert a %rule to an array of iptables commands
1921 sub ipt_rule_to_cmds {
1922     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1923
1924     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1925
1926     my @match = ();
1927
1928     if (defined $rule->{match}) {
1929         push @match, $rule->{match};
1930     } else {
1931         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1932         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1933
1934         if ($rule->{source}) {
1935             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1936         }
1937         if ($rule->{dest}) {
1938             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1939         }
1940
1941         if (my $proto = $rule->{proto}) {
1942             push @match, "-p $proto";
1943
1944             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1945             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1946
1947             my $add_dport = sub {
1948                 return if !$rule->{dport};
1949
1950                 if ($proto eq 'icmp') {
1951                     # Note: we use dport to store --icmp-type
1952                     die "unknown icmp-type '$rule->{dport}'\n"
1953                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1954                     push @match, "-m icmp --icmp-type $rule->{dport}";
1955                 } elsif ($proto eq 'icmpv6') {
1956                     # Note: we use dport to store --icmpv6-type
1957                     die "unknown icmpv6-type '$rule->{dport}'\n"
1958                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1959                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1960                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1961                     die "protocol $proto does not have ports\n";
1962                 } elsif ($multidport) {
1963                     push @match, "--match multiport", "--dports $rule->{dport}";
1964                 } else {
1965                     push @match, "--dport $rule->{dport}";
1966                 }
1967             };
1968
1969             my $add_sport = sub {
1970                 return if !$rule->{sport};
1971
1972                 die "protocol $proto does not have ports\n"
1973                     if !$PROTOCOLS_WITH_PORTS->{$proto};
1974                 if ($multisport) {
1975                     push @match, "--match multiport", "--sports $rule->{sport}";
1976                 } else {
1977                     push @match, "--sport $rule->{sport}";
1978                 }
1979             };
1980
1981             # order matters - single port before multiport!
1982             $add_dport->() if $multisport;
1983             $add_sport->();
1984             $add_dport->() if !$multisport;
1985         } elsif ($rule->{dport} || $rule->{sport}) {
1986             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1987             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1988         }
1989
1990         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1991     }
1992     my $matchstr = scalar(@match) ? join(' ', @match) : "";
1993
1994     my $targetstr;
1995     if (defined $rule->{target}) {
1996         $targetstr = $rule->{target};
1997     } else {
1998         my $action = (defined $rule->{action}) ? $rule->{action} : "";
1999         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2000         $targetstr = ($goto) ? "-g $action" : "-j $action";
2001     }
2002
2003     my @iptcmds;
2004     if (defined $rule->{log} && $rule->{log}) {
2005         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
2006         push @iptcmds, "-A $chain $matchstr $logaction";
2007     }
2008     push @iptcmds, "-A $chain $matchstr $targetstr";
2009     return @iptcmds;
2010 }
2011
2012 sub ruleset_generate_rule {
2013     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
2014
2015     my $rules;
2016
2017     if ($rule->{macro}) {
2018         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2019     } else {
2020         $rules = [ $rule ];
2021     }
2022
2023     # update all or nothing
2024     my @ipt_rule_cmds;
2025     foreach my $r (@$rules) {
2026         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
2027     }
2028     foreach my $c (@ipt_rule_cmds) {
2029         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2030     }
2031 }
2032
2033 sub ruleset_create_chain {
2034     my ($ruleset, $chain) = @_;
2035
2036     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2037     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2038
2039     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2040
2041     $ruleset->{$chain} = [];
2042 }
2043
2044 sub ruleset_chain_exist {
2045     my ($ruleset, $chain) = @_;
2046
2047     return $ruleset->{$chain} ? 1 : undef;
2048 }
2049
2050 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2051 sub ruleset_add_ipt_cmd {
2052    my ($ruleset, $chain, $iptcmd) = @_;
2053
2054    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2055
2056    push @{$ruleset->{$chain}}, $iptcmd;
2057 }
2058
2059 sub ruleset_addrule {
2060    my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2061
2062    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2063
2064    if (defined($log) && $log) {
2065         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2066         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2067    }
2068    # for stable ebtables digests avoid double-spaces to match ebtables-save output
2069    $match .= ' ' if length($match);
2070    push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2071 }
2072
2073 sub ruleset_insertrule {
2074    my ($ruleset, $chain, $match, $action, $log) = @_;
2075
2076    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2077
2078    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2079 }
2080
2081 sub get_log_rule_base {
2082     my ($chain, $vmid, $msg, $loglevel) = @_;
2083
2084     $vmid = 0 if !defined($vmid);
2085     $msg = "" if !defined($msg);
2086
2087     # Note: we use special format for prefix to pass further
2088     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2089
2090     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2091 }
2092
2093 sub ruleset_add_chain_policy {
2094     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2095
2096     if ($policy eq 'ACCEPT') {
2097
2098         my $rule = { action => 'ACCEPT' };
2099         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2100         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2101
2102     } elsif ($policy eq 'DROP') {
2103
2104         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2105
2106         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2107     } elsif ($policy eq 'REJECT') {
2108         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2109
2110         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2111     } else {
2112         # should not happen
2113         die "internal error: unknown policy '$policy'";
2114     }
2115 }
2116
2117 sub ruleset_chain_add_ndp {
2118     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2119     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2120
2121     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2122     if ($direction ne 'OUT' || $options->{radv}) {
2123         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2124     }
2125     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2126     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2127 }
2128
2129 sub ruleset_chain_add_conn_filters {
2130     my ($ruleset, $chain, $accept) = @_;
2131
2132     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2133     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2134 }
2135
2136 sub ruleset_chain_add_input_filters {
2137     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2138
2139     if ($cluster_conf->{ipset}->{blacklist}){
2140         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2141             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2142             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2143         }
2144         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2145         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2146     }
2147
2148     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2149         if ($ipversion == 4) {
2150             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2151         }
2152     }
2153
2154     if ($options->{tcpflags}) {
2155         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2156     }
2157 }
2158
2159 sub ruleset_create_vm_chain {
2160     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2161
2162     ruleset_create_chain($ruleset, $chain);
2163     my $accept = generate_nfqueue($options);
2164
2165     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2166         if ($ipversion == 4) {
2167             if ($direction eq 'OUT') {
2168                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2169                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2170                                         proto => 'udp', sport => 68, dport => 67 });
2171             } else {
2172                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2173                                       { action => 'ACCEPT',
2174                                         proto => 'udp', sport => 67, dport => 68 });
2175             }
2176         } elsif ($ipversion == 6) {
2177             if ($direction eq 'OUT') {
2178                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2179                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2180                                         proto => 'udp', sport => 546, dport => 547 });
2181             } else {
2182                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2183                                       { action => 'ACCEPT',
2184                                         proto => 'udp', sport => 547, dport => 546 });
2185             }
2186         }
2187
2188     }
2189
2190     if ($direction eq 'OUT') {
2191         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2192             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2193         }
2194         if ($ipversion == 6 && !$options->{radv}) {
2195             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2196         }
2197         if ($ipfilter_ipset) {
2198             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2199         }
2200         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2201     }
2202
2203     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2204     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2205 }
2206
2207 sub ruleset_add_group_rule {
2208     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2209
2210     my $group = $rule->{action};
2211     my $group_chain = "GROUP-$group-$direction";
2212     if(!ruleset_chain_exist($ruleset, $group_chain)){
2213         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2214     }
2215
2216     if ($direction eq 'OUT' && $rule->{iface_out}) {
2217         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2218     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2219         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2220     } else {
2221         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2222     }
2223
2224     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2225 }
2226
2227 sub ruleset_generate_vm_rules {
2228     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2229
2230     my $lc_direction = lc($direction);
2231
2232     my $in_accept = generate_nfqueue($options);
2233
2234     foreach my $rule (@$rules) {
2235         next if $rule->{iface} && $rule->{iface} ne $netid;
2236         next if !$rule->{enable} || $rule->{errors};
2237         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2238
2239         if ($rule->{type} eq 'group') {
2240             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2241                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2242         } else {
2243             next if $rule->{type} ne $lc_direction;
2244             eval {
2245                 if ($direction eq 'OUT') {
2246                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2247                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2248                 } else {
2249                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2250                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2251                 }
2252             };
2253             warn $@ if $@;
2254         }
2255     }
2256 }
2257
2258 sub generate_nfqueue {
2259     my ($options) = @_;
2260
2261     if ($options->{ips}) {
2262         my $action = "NFQUEUE";
2263         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2264             if (defined($3) && defined($1)) {
2265                 $action .= " --queue-balance $1:$3";
2266             } elsif (defined($1)) {
2267                 $action .= " --queue-num $1";
2268             }
2269         }
2270         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2271         return $action;
2272     } else {
2273         return "ACCEPT";
2274     }
2275 }
2276
2277 sub ruleset_generate_vm_ipsrules {
2278     my ($ruleset, $options, $direction, $iface) = @_;
2279
2280     if ($options->{ips} && $direction eq 'IN') {
2281         my $nfqueue = generate_nfqueue($options);
2282
2283         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2284             ruleset_create_chain($ruleset, "PVEFW-IPS");
2285         }
2286
2287         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2288     }
2289 }
2290
2291 sub generate_tap_rules_direction {
2292     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2293
2294     my $lc_direction = lc($direction);
2295
2296     my $rules = $vmfw_conf->{rules};
2297
2298     my $options = $vmfw_conf->{options};
2299     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2300
2301     my $tapchain = "$iface-$direction";
2302
2303     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2304     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2305         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2306
2307     # create chain with mac and ip filter
2308     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2309
2310     if ($options->{enable}) {
2311         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2312
2313         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2314
2315         # implement policy
2316         my $policy;
2317
2318         if ($direction eq 'OUT') {
2319             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2320         } else {
2321             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2322         }
2323
2324         my $accept = generate_nfqueue($options);
2325         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2326         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2327     } else {
2328         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2329         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2330     }
2331
2332     # plug the tap chain to bridge chain
2333     if ($direction eq 'IN') {
2334         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2335                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2336     } else {
2337         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2338                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2339     }
2340 }
2341
2342 sub enable_host_firewall {
2343     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2344
2345     my $options = $hostfw_conf->{options};
2346     my $cluster_options = $cluster_conf->{options};
2347     my $rules = $hostfw_conf->{rules};
2348     my $cluster_rules = $cluster_conf->{rules};
2349
2350     # host inbound firewall
2351     my $chain = "PVEFW-HOST-IN";
2352     ruleset_create_chain($ruleset, $chain);
2353
2354     my $loglevel = get_option_log_level($options, "log_level_in");
2355
2356     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2357
2358     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2359     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2360     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2361
2362     # we use RETURN because we need to check also tap rules
2363     my $accept_action = 'RETURN';
2364
2365     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2366
2367     # add host rules first, so that cluster wide rules can be overwritten
2368     foreach my $rule (@$rules, @$cluster_rules) {
2369         next if !$rule->{enable} || $rule->{errors};
2370         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2371
2372         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2373
2374         eval {
2375             if ($rule->{type} eq 'group') {
2376                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2377             } elsif ($rule->{type} eq 'in') {
2378                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2379                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2380             }
2381         };
2382         warn $@ if $@;
2383         delete $rule->{iface_in};
2384     }
2385
2386     # allow standard traffic for management ipset (includes cluster network)
2387     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2388     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2389     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2390     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2391     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2392     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2393
2394     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2395     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2396
2397     # corosync
2398     if ($localnet && ($ipversion == $localnet_ver)) {
2399         my $corosync_rule = "-p udp --dport 5404:5405";
2400         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2401         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2402     }
2403
2404     # implement input policy
2405     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2406     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2407
2408     # host outbound firewall
2409     $chain = "PVEFW-HOST-OUT";
2410     ruleset_create_chain($ruleset, $chain);
2411
2412     $loglevel = get_option_log_level($options, "log_level_out");
2413
2414     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2415
2416     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2417
2418     # we use RETURN because we may want to check other thigs later
2419     $accept_action = 'RETURN';
2420     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2421
2422     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2423
2424     # add host rules first, so that cluster wide rules can be overwritten
2425     foreach my $rule (@$rules, @$cluster_rules) {
2426         next if !$rule->{enable} || $rule->{errors};
2427         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2428
2429         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2430         eval {
2431             if ($rule->{type} eq 'group') {
2432                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2433             } elsif ($rule->{type} eq 'out') {
2434                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2435                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2436             }
2437         };
2438         warn $@ if $@;
2439         delete $rule->{iface_out};
2440     }
2441
2442     # allow standard traffic on cluster network
2443     if ($localnet && ($ipversion == $localnet_ver)) {
2444         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2445         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2446         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2447         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2448
2449         my $corosync_rule = "-p udp --dport 5404:5405";
2450         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2451         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2452     }
2453
2454     # implement output policy
2455     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2456     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2457
2458     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2459     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2460 }
2461
2462 sub generate_group_rules {
2463     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2464
2465     my $rules = $cluster_conf->{groups}->{$group};
2466
2467     if (!$rules) {
2468         warn "no such security group '$group'\n";
2469         $rules = []; # create empty chain
2470     }
2471
2472     my $chain = "GROUP-${group}-IN";
2473
2474     ruleset_create_chain($ruleset, $chain);
2475     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2476
2477     foreach my $rule (@$rules) {
2478         next if $rule->{type} ne 'in';
2479         next if !$rule->{enable} || $rule->{errors};
2480         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2481         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2482         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2483     }
2484
2485     $chain = "GROUP-${group}-OUT";
2486
2487     ruleset_create_chain($ruleset, $chain);
2488     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2489
2490     foreach my $rule (@$rules) {
2491         next if $rule->{type} ne 'out';
2492         next if !$rule->{enable} || $rule->{errors};
2493         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2494         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2495         # check also other tap rules later
2496         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2497         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2498     }
2499 }
2500
2501 my $MAX_NETS = 32;
2502 my $valid_netdev_names = {};
2503 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2504     $valid_netdev_names->{"net$i"} = 1;
2505 }
2506
2507 sub get_mark_values {
2508     my ($value, $mask) = @_;
2509     $value = hex($value) if $value =~ /^0x/;
2510     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2511     $mask = 0xffffffff if !defined($mask);
2512     return ($value, $mask);
2513 }
2514
2515 sub parse_fw_rule {
2516     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2517
2518     my $orig_line = $line;
2519
2520     my $rule = {};
2521
2522     # we can add single line comments to the end of the rule
2523     if ($line =~ s/#\s*(.*?)\s*$//) {
2524         $rule->{comment} = decode('utf8', $1);
2525     }
2526
2527     # we can disable a rule when prefixed with '|'
2528
2529     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2530
2531     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2532         die "unable to parse rule: $line\n";
2533
2534     $rule->{type} = lc($1);
2535     $rule->{action} = $2;
2536
2537     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2538         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2539             $rule->{macro} = $1;
2540             $rule->{action} = $2;
2541         }
2542     }
2543
2544     while (length($line)) {
2545         if ($line =~ s/^-i (\S+)\s*//) {
2546             $rule->{iface} = $1;
2547             next;
2548         }
2549
2550         last if $rule->{type} eq 'group';
2551
2552         if ($line =~ s/^-p (\S+)\s*//) {
2553             $rule->{proto} = $1;
2554             next;
2555         }
2556
2557         if ($line =~ s/^-dport (\S+)\s*//) {
2558             $rule->{dport} = $1;
2559             next;
2560         }
2561
2562         if ($line =~ s/^-sport (\S+)\s*//) {
2563             $rule->{sport} = $1;
2564             next;
2565         }
2566         if ($line =~ s/^-source (\S+)\s*//) {
2567             $rule->{source} = $1;
2568             next;
2569         }
2570         if ($line =~ s/^-dest (\S+)\s*//) {
2571             $rule->{dest} = $1;
2572             next;
2573         }
2574
2575         last;
2576     }
2577
2578     die "unable to parse rule parameters: $line\n" if length($line);
2579
2580     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2581     if ($rule->{errors}) {
2582         # The verbose flag really means we're running from the CLI and want
2583         # output on the console - in the other case we really want such errors
2584         # to go into the syslog instead.
2585         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2586         $log->("$prefix - errors in rule parameters: $orig_line\n");
2587         foreach my $p (keys %{$rule->{errors}}) {
2588             $log->("  $p: $rule->{errors}->{$p}\n");
2589         }
2590     }
2591
2592     return $rule;
2593 }
2594
2595 sub verify_ethertype {
2596     my ($value) = @_;
2597     my $types = get_etc_ethertypes();
2598     die "unknown ethernet protocol type: $value\n"
2599         if !defined($types->{byname}->{$value}) &&
2600            !defined($types->{byid}->{$value});
2601 }
2602
2603 sub parse_vmfw_option {
2604     my ($line) = @_;
2605
2606     my ($opt, $value);
2607
2608     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2609
2610     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2611         $opt = lc($1);
2612         $value = int($2);
2613     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2614         $opt = lc($1);
2615         $value = $2 ? lc($3) : '';
2616     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2617         $opt = lc($1);
2618         $value = uc($3);
2619     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2620         $opt = lc($1);
2621         $value = $2;
2622     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2623         $opt = lc($1);
2624         $value = $2;
2625         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2626     } else {
2627         die "can't parse option '$line'\n"
2628     }
2629
2630     return ($opt, $value);
2631 }
2632
2633 sub parse_hostfw_option {
2634     my ($line) = @_;
2635
2636     my ($opt, $value);
2637
2638     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2639
2640     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2641         $opt = lc($1);
2642         $value = int($2);
2643     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2644         $opt = lc($1);
2645         $value = $2 ? lc($3) : '';
2646     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2647         $opt = lc($1);
2648         $value = int($2);
2649     } else {
2650         die "can't parse option '$line'\n"
2651     }
2652
2653     return ($opt, $value);
2654 }
2655
2656 sub parse_clusterfw_option {
2657     my ($line) = @_;
2658
2659     my ($opt, $value);
2660
2661     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2662         $opt = lc($1);
2663         $value = int($2);
2664         if (($value > 1) && ((time() - $value) > 60)) {
2665             $value = 0
2666         }
2667     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2668         $opt = lc($1);
2669         $value = int($2);
2670     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2671         $opt = lc($1);
2672         $value = uc($3);
2673     } else {
2674         die "can't parse option '$line'\n"
2675     }
2676
2677     return ($opt, $value);
2678 }
2679
2680 sub resolve_alias {
2681     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2682
2683     my $alias = lc($cidr);
2684     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2685     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2686
2687     die "no such alias '$cidr'\n" if !$e;;
2688
2689     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2690 }
2691
2692 sub parse_ip_or_cidr {
2693     my ($cidr) = @_;
2694
2695     my $ipversion;
2696
2697     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2698         $cidr =~ s|/128$||;
2699         $ipversion = 6;
2700     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2701         $cidr =~ s|/32$||;
2702         $ipversion = 4;
2703     } else {
2704         die "value does not look like a valid IP address or CIDR network\n";
2705     }
2706
2707     return wantarray ? ($cidr, $ipversion) : $cidr;
2708 }
2709
2710 sub parse_alias {
2711     my ($line) = @_;
2712
2713     # we can add single line comments to the end of the line
2714     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2715
2716     if ($line =~ m/^(\S+)\s(\S+)$/) {
2717         my ($name, $cidr) = ($1, $2);
2718         my $ipversion;
2719
2720         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2721
2722         my $data = {
2723             name => $name,
2724             cidr => $cidr,
2725             ipversion => $ipversion,
2726         };
2727         $data->{comment} = $comment  if $comment;
2728         return $data;
2729     }
2730
2731     return undef;
2732 }
2733
2734 sub generic_fw_config_parser {
2735     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2736
2737     my $section;
2738     my $group;
2739
2740     my $res = $empty_conf;
2741
2742     while (defined(my $line = <$fh>)) {
2743         next if $line =~ m/^#/;
2744         next if $line =~ m/^\s*$/;
2745
2746         chomp $line;
2747
2748         my $linenr = $fh->input_line_number();
2749         my $prefix = "$filename (line $linenr)";
2750
2751         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2752             $section = 'options';
2753             next;
2754         }
2755
2756         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2757             $section = 'aliases';
2758             next;
2759         }
2760
2761         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2762             $section = 'groups';
2763             $group = lc($1);
2764             my $comment = $2;
2765             eval {
2766                 die "security group name too long\n" if length($group) > $max_group_name_length;
2767                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2768             };
2769             if (my $err = $@) {
2770                 ($section, $group, $comment) = undef;
2771                 warn "$prefix: $err";
2772                 next;
2773             }
2774
2775             $res->{$section}->{$group} = [];
2776             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2777                 if $comment;
2778             next;
2779         }
2780
2781         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2782             $section = 'rules';
2783             next;
2784         }
2785
2786         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2787             $section = 'ipset';
2788             $group = lc($1);
2789             my $comment = $2;
2790             eval {
2791                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2792                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2793             };
2794             if (my $err = $@) {
2795                 ($section, $group, $comment) = undef;
2796                 warn "$prefix: $err";
2797                 next;
2798             }
2799
2800             $res->{$section}->{$group} = [];
2801             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2802                 if $comment;
2803             next;
2804         }
2805
2806         if (!$section) {
2807             warn "$prefix: skip line - no section\n";
2808             next;
2809         }
2810
2811         if ($section eq 'options') {
2812             eval {
2813                 my ($opt, $value);
2814                 if ($rule_env eq 'cluster') {
2815                     ($opt, $value) = parse_clusterfw_option($line);
2816                 } elsif ($rule_env eq 'host') {
2817                     ($opt, $value) = parse_hostfw_option($line);
2818                 } else {
2819                     ($opt, $value) = parse_vmfw_option($line);
2820                 }
2821                 $res->{options}->{$opt} = $value;
2822             };
2823             warn "$prefix: $@" if $@;
2824         } elsif ($section eq 'aliases') {
2825             eval {
2826                 my $data = parse_alias($line);
2827                 $res->{aliases}->{lc($data->{name})} = $data;
2828             };
2829             warn "$prefix: $@" if $@;
2830         } elsif ($section eq 'rules') {
2831             my $rule;
2832             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2833             if (my $err = $@) {
2834                 warn "$prefix: $err";
2835                 next;
2836             }
2837             push @{$res->{$section}}, $rule;
2838         } elsif ($section eq 'groups') {
2839             my $rule;
2840             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2841             if (my $err = $@) {
2842                 warn "$prefix: $err";
2843                 next;
2844             }
2845             push @{$res->{$section}->{$group}}, $rule;
2846         } elsif ($section eq 'ipset') {
2847             # we can add single line comments to the end of the rule
2848             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2849
2850             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2851             my $nomatch = $1;
2852             my $cidr = $2;
2853             my $errors;
2854
2855             if ($nomatch && !$feature_ipset_nomatch) {
2856                 $errors->{nomatch} = "nomatch not supported by kernel";
2857             }
2858
2859             eval {
2860                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2861                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2862                 } else {
2863                     $cidr = parse_ip_or_cidr($cidr);
2864                 }
2865             };
2866             if (my $err = $@) {
2867                 chomp $err;
2868                 $errors->{cidr} = $err;
2869             }
2870
2871             if ($cidr =~ m!/0+$!) {
2872                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2873             }
2874
2875             my $entry = { cidr => $cidr };
2876             $entry->{nomatch} = 1 if $nomatch;
2877             $entry->{comment} = $comment if $comment;
2878             $entry->{errors} =  $errors if $errors;
2879
2880             if ($verbose && $errors) {
2881                 warn "$prefix - errors in ipset '$group': $line\n";
2882                 foreach my $p (keys %{$errors}) {
2883                     warn "  $p: $errors->{$p}\n";
2884                 }
2885             }
2886
2887             push @{$res->{$section}->{$group}}, $entry;
2888         } else {
2889             warn "$prefix: skip line - unknown section\n";
2890             next;
2891         }
2892     }
2893
2894     return $res;
2895 }
2896
2897 sub parse_hostfw_config {
2898     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2899
2900     my $empty_conf = { rules => [], options => {}};
2901
2902     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2903 }
2904
2905 sub parse_vmfw_config {
2906     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2907
2908     my $empty_conf = {
2909         rules => [],
2910         options => {},
2911         aliases => {},
2912         ipset => {} ,
2913         ipset_comments => {},
2914     };
2915
2916     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2917 }
2918
2919 sub parse_clusterfw_config {
2920     my ($filename, $fh, $verbose) = @_;
2921
2922     my $section;
2923     my $group;
2924
2925     my $empty_conf = {
2926         rules => [],
2927         options => {},
2928         aliases => {},
2929         groups => {},
2930         group_comments => {},
2931         ipset => {} ,
2932         ipset_comments => {},
2933     };
2934
2935     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2936 }
2937
2938 sub run_locked {
2939     my ($code, @param) = @_;
2940
2941     my $timeout = 10;
2942
2943     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2944
2945     die $@ if $@;
2946
2947     return $res;
2948 }
2949
2950 sub read_local_vm_config {
2951
2952     my $qemu = {};
2953     my $lxc = {};
2954
2955     my $vmdata = { qemu => $qemu, lxc => $lxc };
2956
2957     my $vmlist = PVE::Cluster::get_vmlist();
2958     return $vmdata if !$vmlist || !$vmlist->{ids};
2959     my $ids = $vmlist->{ids};
2960
2961     foreach my $vmid (keys %$ids) {
2962         next if !$vmid; # skip VE0
2963         my $d = $ids->{$vmid};
2964         next if !$d->{node} || $d->{node} ne $nodename;
2965         next if !$d->{type};
2966         if ($d->{type} eq 'qemu') {
2967             if ($have_qemu_server) {
2968                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2969                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2970                     $qemu->{$vmid} = $conf;
2971                 }
2972             }
2973         } elsif ($d->{type} eq 'lxc') {
2974             if ($have_lxc) {
2975                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2976                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2977                     $lxc->{$vmid} = $conf;
2978                 }
2979             }
2980         }
2981     }
2982
2983     return $vmdata;
2984 };
2985
2986 sub load_vmfw_conf {
2987     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2988
2989     my $vmfw_conf = {};
2990
2991     $dir = $pvefw_conf_dir if !defined($dir);
2992
2993     my $filename = "$dir/$vmid.fw";
2994     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2995         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2996         $vmfw_conf->{vmid} = $vmid;
2997     }
2998
2999     return $vmfw_conf;
3000 }
3001
3002 my $format_rules = sub {
3003     my ($rules, $allow_iface) = @_;
3004
3005     my $raw = '';
3006
3007     foreach my $rule (@$rules) {
3008         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3009             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3010             $raw .= uc($rule->{type});
3011             if ($rule->{macro}) {
3012                 $raw .= " $rule->{macro}($rule->{action})";
3013             } else {
3014                 $raw .= " " . $rule->{action};
3015             }
3016             if ($allow_iface && $rule->{iface}) {
3017                 $raw .= " -i $rule->{iface}";
3018             }
3019
3020             if ($rule->{type} ne  'group')  {
3021                 $raw .= " -source $rule->{source}" if $rule->{source};
3022                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3023                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3024                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3025                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3026             }
3027
3028             $raw .= " # " . encode('utf8', $rule->{comment})
3029                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3030             $raw .= "\n";
3031         } else {
3032             die "unknown rule type '$rule->{type}'";
3033         }
3034     }
3035
3036     return $raw;
3037 };
3038
3039 my $format_options = sub {
3040     my ($options) = @_;
3041
3042     my $raw = '';
3043
3044     $raw .= "[OPTIONS]\n\n";
3045     foreach my $opt (keys %$options) {
3046         $raw .= "$opt: $options->{$opt}\n";
3047     }
3048     $raw .= "\n";
3049
3050     return $raw;
3051 };
3052
3053 my $format_aliases = sub {
3054     my ($aliases) = @_;
3055
3056     my $raw = '';
3057
3058     $raw .= "[ALIASES]\n\n";
3059     foreach my $k (keys %$aliases) {
3060         my $e = $aliases->{$k};
3061         $raw .= "$e->{name} $e->{cidr}";
3062         $raw .= " # " . encode('utf8', $e->{comment})
3063             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3064         $raw .= "\n";
3065     }
3066     $raw .= "\n";
3067
3068     return $raw;
3069 };
3070
3071 my $format_ipsets = sub {
3072     my ($fw_conf) = @_;
3073
3074     my $raw = '';
3075
3076     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3077         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3078             my $utf8comment = encode('utf8', $comment);
3079             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3080         } else {
3081             $raw .= "[IPSET $ipset]\n\n";
3082         }
3083         my $options = $fw_conf->{ipset}->{$ipset};
3084
3085         my $nethash = {};
3086         foreach my $entry (@$options) {
3087             $nethash->{$entry->{cidr}} = $entry;
3088         }
3089
3090         foreach my $cidr (sort keys %$nethash) {
3091             my $entry = $nethash->{$cidr};
3092             my $line = $entry->{nomatch} ? '!' : '';
3093             $line .= $entry->{cidr};
3094             $line .= " # " . encode('utf8', $entry->{comment})
3095                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3096             $raw .= "$line\n";
3097         }
3098
3099         $raw .= "\n";
3100     }
3101
3102     return $raw;
3103 };
3104
3105 sub save_vmfw_conf {
3106     my ($vmid, $vmfw_conf) = @_;
3107
3108     my $raw = '';
3109
3110     my $options = $vmfw_conf->{options};
3111     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3112
3113     my $aliases = $vmfw_conf->{aliases};
3114     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3115
3116     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3117
3118     my $rules = $vmfw_conf->{rules} || [];
3119     if ($rules && scalar(@$rules)) {
3120         $raw .= "[RULES]\n\n";
3121         $raw .= &$format_rules($rules, 1);
3122         $raw .= "\n";
3123     }
3124
3125     my $filename = "$pvefw_conf_dir/$vmid.fw";
3126     if ($raw) {
3127         mkdir $pvefw_conf_dir;
3128         PVE::Tools::file_set_contents($filename, $raw);
3129     } else {
3130         unlink $filename;
3131     }
3132 }
3133
3134 sub remove_vmfw_conf {
3135     my ($vmid) = @_;
3136
3137     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3138
3139     unlink $vmfw_conffile;
3140 }
3141
3142 sub clone_vmfw_conf {
3143     my ($vmid, $newid) = @_;
3144
3145     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3146     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3147
3148     if (-f $clonevm_conffile) {
3149         unlink $clonevm_conffile;
3150     }
3151     if (-f $sourcevm_conffile) {
3152         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3153         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3154     }
3155 }
3156
3157 sub read_vm_firewall_configs {
3158     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3159
3160     my $vmfw_configs = {};
3161
3162     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3163         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3164         next if !$vmfw_conf->{options}; # skip if file does not exists
3165         $vmfw_configs->{$vmid} = $vmfw_conf;
3166     }
3167     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3168         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3169         next if !$vmfw_conf->{options}; # skip if file does not exists
3170         $vmfw_configs->{$vmid} = $vmfw_conf;
3171     }
3172
3173     return $vmfw_configs;
3174 }
3175
3176 sub get_option_log_level {
3177     my ($options, $k) = @_;
3178
3179     my $v = $options->{$k};
3180     $v = $default_log_level if !defined($v);
3181
3182     return undef if $v eq '' || $v eq 'nolog';
3183
3184     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3185
3186     return $v if ($v >= 0) && ($v <= 7);
3187
3188     warn "unknown log level ($k = '$v')\n";
3189
3190     return undef;
3191 }
3192
3193 sub generate_std_chains {
3194     my ($ruleset, $options, $ipversion) = @_;
3195
3196     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3197
3198     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3199     my $chain = 'PVEFW-smurflog';
3200     if ( $std_chains->{$chain} ) {
3201         foreach my $r (@{$std_chains->{$chain}}) {
3202           $r->{log} = $loglevel;
3203         }
3204     }
3205
3206     # same as shorewall logflags action.
3207     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3208     $chain = 'PVEFW-logflags';
3209     if ( $std_chains->{$chain} ) {
3210         foreach my $r (@{$std_chains->{$chain}}) {
3211           $r->{log} = $loglevel;
3212         }
3213     }
3214
3215     foreach my $chain (keys %$std_chains) {
3216         ruleset_create_chain($ruleset, $chain);
3217         foreach my $rule (@{$std_chains->{$chain}}) {
3218             if (ref($rule)) {
3219                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3220             } else {
3221                 die "rule $rule as string - should not happen";
3222             }
3223         }
3224     }
3225 }
3226
3227 sub generate_ipset_chains {
3228     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3229
3230     foreach my $ipset (keys %{$ipsets}) {
3231
3232         my $options = $ipsets->{$ipset};
3233
3234         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3235             if (my $ips = $device_ips->{$1}) {
3236                 $options = [@$options, @$ips];
3237             }
3238         }
3239
3240         # remove duplicates
3241         my $nethash = {};
3242         foreach my $entry (@$options) {
3243             next if $entry->{errors}; # skip entries with errors
3244             eval {
3245                 my ($cidr, $ver);
3246                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3247                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3248                 } else {
3249                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3250                 }
3251                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3252                 if ($ver == 6) {
3253                     # ip_compress_address takes an address only, no CIDR
3254                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3255                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3256                     $cidr .= $prefix_len if defined($prefix_len);
3257                     $cidr =~ s|/128$||;
3258                 } else {
3259                     $cidr =~ s|/32$||;
3260                 }
3261
3262                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3263             };
3264             warn $@ if $@;
3265         }
3266
3267         foreach my $ipversion (4, 6) {
3268             my $data = $nethash->{$ipversion};
3269
3270             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3271
3272             my $hashsize = scalar(@$options);
3273             if ($hashsize <= 64) {
3274                 $hashsize = 64;
3275             } else {
3276                 $hashsize = round_powerof2($hashsize);
3277             }
3278
3279             my $family = $ipversion == "6" ? "inet6" : "inet";
3280
3281             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3282
3283             foreach my $cidr (sort keys %$data) {
3284                 my $entry = $data->{$cidr};
3285
3286                 my $cmd = "add $name $cidr";
3287                 if ($entry->{nomatch}) {
3288                     if ($feature_ipset_nomatch) {
3289                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3290                     } else {
3291                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3292                     }
3293                 } else {
3294                     push @{$ipset_ruleset->{$name}}, $cmd;
3295                 }
3296             }
3297         }
3298     }
3299 }
3300
3301 sub round_powerof2 {
3302     my ($int) = @_;
3303
3304     $int--;
3305     $int |= $int >> $_ foreach (1,2,4,8,16);
3306     return ++$int;
3307 }
3308
3309 sub load_clusterfw_conf {
3310     my ($filename, $verbose) = @_;
3311
3312     $filename = $clusterfw_conf_filename if !defined($filename);
3313
3314     my $cluster_conf = {};
3315     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3316         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3317     }
3318
3319     return $cluster_conf;
3320 }
3321
3322 sub save_clusterfw_conf {
3323     my ($cluster_conf) = @_;
3324
3325     my $raw = '';
3326
3327     my $options = $cluster_conf->{options};
3328     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3329
3330     my $aliases = $cluster_conf->{aliases};
3331     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3332
3333     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3334
3335     my $rules = $cluster_conf->{rules};
3336     if ($rules && scalar(@$rules)) {
3337         $raw .= "[RULES]\n\n";
3338         $raw .= &$format_rules($rules, 1);
3339         $raw .= "\n";
3340     }
3341
3342     if ($cluster_conf->{groups}) {
3343         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3344             my $rules = $cluster_conf->{groups}->{$group};
3345             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3346                 my $utf8comment = encode('utf8', $comment);
3347                 $raw .= "[group $group] # $utf8comment\n\n";
3348             } else {
3349                 $raw .= "[group $group]\n\n";
3350             }
3351
3352             $raw .= &$format_rules($rules, 0);
3353             $raw .= "\n";
3354         }
3355     }
3356
3357     if ($raw) {
3358         mkdir $pvefw_conf_dir;
3359         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3360     } else {
3361         unlink $clusterfw_conf_filename;
3362     }
3363 }
3364
3365 sub load_hostfw_conf {
3366     my ($cluster_conf, $filename, $verbose) = @_;
3367
3368     $filename = $hostfw_conf_filename if !defined($filename);
3369
3370     my $hostfw_conf = {};
3371     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3372         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3373     }
3374     return $hostfw_conf;
3375 }
3376
3377 sub save_hostfw_conf {
3378     my ($hostfw_conf) = @_;
3379
3380     my $raw = '';
3381
3382     my $options = $hostfw_conf->{options};
3383     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3384
3385     my $rules = $hostfw_conf->{rules};
3386     if ($rules && scalar(@$rules)) {
3387         $raw .= "[RULES]\n\n";
3388         $raw .= &$format_rules($rules, 1);
3389         $raw .= "\n";
3390     }
3391
3392     if ($raw) {
3393         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3394     } else {
3395         unlink $hostfw_conf_filename;
3396     }
3397 }
3398
3399 sub compile {
3400     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3401
3402     my $vmfw_configs;
3403
3404     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3405     $pve_std_chains = dclone($pve_std_chains_conf);
3406
3407     if ($vmdata) { # test mode
3408         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3409         my $filename = "$testdir/cluster.fw";
3410         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3411
3412         $filename = "$testdir/host.fw";
3413         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3414
3415         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3416     } else { # normal operation
3417         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3418
3419         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3420
3421         $vmdata = read_local_vm_config();
3422         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3423     }
3424
3425     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3426
3427     my $localnet;
3428     if ($cluster_conf->{aliases}->{local_network}) {
3429         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3430     } else {
3431         my $localnet_ver;
3432         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3433
3434         $cluster_conf->{aliases}->{local_network} = {
3435             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3436     }
3437
3438     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3439
3440     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3441     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3442     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3443     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3444
3445     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3446 }
3447
3448 sub compile_iptables_filter {
3449     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3450
3451     my $ruleset = {};
3452
3453     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3454     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3455
3456     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3457
3458     my $hostfw_options = $hostfw_conf->{options} || {};
3459
3460     # fixme: what log level should we use here?
3461     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3462
3463     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3464
3465     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3466     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3467
3468     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3469
3470     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3471     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3472
3473     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3474
3475     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3476
3477     if ($hostfw_enable) {
3478         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3479         warn $@ if $@; # just to be sure - should not happen
3480     }
3481
3482     # generate firewall rules for QEMU VMs
3483     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3484         eval {
3485             my $conf = $vmdata->{qemu}->{$vmid};
3486             my $vmfw_conf = $vmfw_configs->{$vmid};
3487             return if !$vmfw_conf;
3488
3489             foreach my $netid (sort keys %$conf) {
3490                 next if $netid !~ m/^net(\d+)$/;
3491                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3492                 next if !$net->{firewall};
3493                 my $iface = "tap${vmid}i$1";
3494
3495                 my $macaddr = $net->{macaddr};
3496                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3497                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3498                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3499                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3500             }
3501         };
3502         warn $@ if $@; # just to be sure - should not happen
3503     }
3504
3505     # generate firewall rules for LXC containers
3506     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3507         eval {
3508             my $conf = $vmdata->{lxc}->{$vmid};
3509             my $vmfw_conf = $vmfw_configs->{$vmid};
3510             return if !$vmfw_conf;
3511
3512             if ($vmfw_conf->{options}->{enable}) {
3513                 foreach my $netid (sort keys %$conf) {
3514                     next if $netid !~ m/^net(\d+)$/;
3515                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3516                     next if !$net->{firewall};
3517                     my $iface = "veth${vmid}i$1";
3518                     my $macaddr = $net->{hwaddr};
3519                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3520                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3521                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3522                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3523                 }
3524             }
3525         };
3526         warn $@ if $@; # just to be sure - should not happen
3527     }
3528
3529     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3530         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3531     }
3532
3533     return $ruleset;
3534 }
3535
3536 sub mac_to_linklocal {
3537     my ($macaddr) = @_;
3538     my @parts = split(/:/, $macaddr);
3539     # The standard link local address uses the fe80::/64 prefix with the
3540     # modified EUI-64 identifier derived from the MAC address by flipping the
3541     # universal/local bit and inserting FF:FE in the middle.
3542     # See RFC 4291.
3543     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3544     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3545     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3546 }
3547
3548 sub compile_ipsets {
3549     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3550
3551     my $localnet;
3552     if ($cluster_conf->{aliases}->{local_network}) {
3553         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3554     } else {
3555         my $localnet_ver;
3556         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3557
3558         $cluster_conf->{aliases}->{local_network} = {
3559             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3560     }
3561
3562     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3563
3564
3565     my $ipset_ruleset = {};
3566
3567     # generate ipsets for QEMU VMs
3568     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3569         eval {
3570             my $conf = $vmdata->{qemu}->{$vmid};
3571             my $vmfw_conf = $vmfw_configs->{$vmid};
3572             return if !$vmfw_conf;
3573
3574             # When the 'ipfilter' option is enabled every device for which there
3575             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3576             # ipset.
3577             # The reason is that ipfilter ipsets are always filled with standard
3578             # IPv6 link-local filters.
3579             my $ipsets = $vmfw_conf->{ipset};
3580             my $implicit_sets = {};
3581
3582             my $device_ips = {};
3583             foreach my $netid (keys %$conf) {
3584                 next if $netid !~ m/^net(\d+)$/;
3585                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3586                 next if !$net->{firewall};
3587
3588                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3589                     $implicit_sets->{"ipfilter-$netid"} = [];
3590                 }
3591
3592                 my $macaddr = $net->{macaddr};
3593                 my $linklocal = mac_to_linklocal($macaddr);
3594                 $device_ips->{$netid} = [
3595                     { cidr => $linklocal },
3596                     { cidr => 'fe80::/10', nomatch => 1 }
3597                 ];
3598             }
3599
3600             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3601             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3602         };
3603         warn $@ if $@; # just to be sure - should not happen
3604     }
3605
3606     # generate firewall rules for LXC containers
3607     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3608         eval {
3609             my $conf = $vmdata->{lxc}->{$vmid};
3610             my $vmfw_conf = $vmfw_configs->{$vmid};
3611             return if !$vmfw_conf;
3612
3613             # When the 'ipfilter' option is enabled every device for which there
3614             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3615             # ipset.
3616             # The reason is that ipfilter ipsets are always filled with standard
3617             # IPv6 link-local filters, as well as the IP addresses configured
3618             # for the container.
3619             my $ipsets = $vmfw_conf->{ipset};
3620             my $implicit_sets = {};
3621
3622             my $device_ips = {};
3623             foreach my $netid (keys %$conf) {
3624                 next if $netid !~ m/^net(\d+)$/;
3625                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3626                 next if !$net->{firewall};
3627
3628                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3629                     $implicit_sets->{"ipfilter-$netid"} = [];
3630                 }
3631
3632                 my $macaddr = $net->{hwaddr};
3633                 my $linklocal = mac_to_linklocal($macaddr);
3634                 my $set = $device_ips->{$netid} = [
3635                     { cidr => $linklocal },
3636                     { cidr => 'fe80::/10', nomatch => 1 }
3637                 ];
3638                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3639                     push @$set, { cidr => $1 };
3640                 }
3641                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3642                     push @$set, { cidr => $1 };
3643                 }
3644             }
3645
3646             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3647             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3648         };
3649         warn $@ if $@; # just to be sure - should not happen
3650     }
3651
3652     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3653
3654     return $ipset_ruleset;
3655 }
3656
3657 sub compile_ebtables_filter {
3658     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3659
3660     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3661         return {};
3662     }
3663
3664     my $ruleset = {};
3665
3666     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3667
3668     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3669     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3670     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3671     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3672     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3673
3674     # generate firewall rules for QEMU VMs
3675     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3676         eval {
3677             my $conf = $vmdata->{qemu}->{$vmid};
3678             my $vmfw_conf = $vmfw_configs->{$vmid};
3679             return if !$vmfw_conf;
3680
3681             foreach my $netid (keys %$conf) {
3682                 next if $netid !~ m/^net(\d+)$/;
3683                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3684                 next if !$net->{firewall};
3685                 my $iface = "tap${vmid}i$1";
3686                 my $macaddr = $net->{macaddr};
3687
3688                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3689
3690             }
3691         };
3692         warn $@ if $@; # just to be sure - should not happen
3693     }
3694
3695     # generate firewall rules for LXC containers
3696     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3697         eval {
3698             my $conf = $vmdata->{lxc}->{$vmid};
3699
3700             my $vmfw_conf = $vmfw_configs->{$vmid};
3701             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3702
3703             foreach my $netid (keys %$conf) {
3704                 next if $netid !~ m/^net(\d+)$/;
3705                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3706                 next if !$net->{firewall};
3707                 my $iface = "veth${vmid}i$1";
3708                 my $macaddr = $net->{hwaddr};
3709                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid);
3710             }
3711         };
3712         warn $@ if $@; # just to be sure - should not happen
3713     }
3714
3715     return $ruleset;
3716 }
3717
3718 sub generate_tap_layer2filter {
3719     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid) = @_;
3720     my $options = $vmfw_conf->{options};
3721
3722     my $tapchain = $iface."-OUT";
3723
3724     # ebtables remove zeros from mac pairs
3725     $macaddr =~ s/0([0-9a-f])/$1/ig;
3726     $macaddr = lc($macaddr);
3727
3728     ruleset_create_chain($ruleset, $tapchain);
3729
3730     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3731             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3732     }
3733
3734     if (defined($options->{layer2_protocols})){
3735         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3736             ruleset_addrule($ruleset, $tapchain, "-p $proto", '-j ACCEPT');
3737         }
3738         ruleset_addrule($ruleset, $tapchain, '', "-j DROP");
3739     } else {
3740         ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3741     }
3742
3743     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3744 }
3745
3746 # the parameter $change_only_regex changes two things if defined:
3747 # * all chains not matching it will be left intact
3748 # * both the $active_chains hash and the returned status_hash have different
3749 #   structure (they contain a key named 'rules').
3750 sub get_ruleset_status {
3751     my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
3752
3753     my $statushash = {};
3754
3755     foreach my $chain (sort keys %$ruleset) {
3756         my $rules = $ruleset->{$chain};
3757         my $sig = &$digest_fn($rules);
3758         my $oldsig;
3759
3760         $statushash->{$chain}->{sig} = $sig;
3761         if (defined($change_only_regex)) {
3762             $oldsig = $active_chains->{$chain}->{sig};
3763             $statushash->{$chain}->{rules} = $rules;
3764         } else {
3765             $oldsig = $active_chains->{$chain};
3766         }
3767         if (!defined($oldsig)) {
3768             $statushash->{$chain}->{action} = 'create';
3769         } else {
3770             if ($oldsig eq $sig) {
3771                 $statushash->{$chain}->{action} = 'exists';
3772             } else {
3773                 $statushash->{$chain}->{action} = 'update';
3774             }
3775         }
3776         if ($verbose) {
3777             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3778             foreach my $cmd (@{$rules}) {
3779                 print "\t$cmd\n";
3780             }
3781         }
3782     }
3783
3784     foreach my $chain (sort keys %$active_chains) {
3785         next if defined($ruleset->{$chain});
3786         my $action = 'delete';
3787         my $sig = $active_chains->{$chain};
3788         if (defined($change_only_regex)) {
3789             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3790             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3791             $sig = $sig->{sig};
3792         }
3793         $statushash->{$chain}->{action} = $action;
3794         $statushash->{$chain}->{sig} = $sig;
3795         print "$action $chain ($sig)\n" if $verbose;
3796     }
3797
3798     return $statushash;
3799 }
3800
3801 sub print_sig_rule {
3802     my ($chain, $sig) = @_;
3803
3804     # We just use this to store a SHA1 checksum used to detect changes
3805     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3806 }
3807
3808 sub get_ruleset_cmdlist {
3809     my ($ruleset, $verbose, $iptablescmd) = @_;
3810
3811     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3812
3813     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3814     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3815
3816     # create missing chains first
3817     foreach my $chain (sort keys %$ruleset) {
3818         my $stat = $statushash->{$chain};
3819         die "internal error" if !$stat;
3820         next if $stat->{action} ne 'create';
3821
3822         $cmdlist .= ":$chain - [0:0]\n";
3823     }
3824
3825     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3826         my $chain = "PVEFW-$h";
3827         if ($ruleset->{$chain} && !$hooks->{$h}) {
3828             $cmdlist .= "-A $h -j $chain\n";
3829         }
3830     }
3831
3832     foreach my $chain (sort keys %$ruleset) {
3833         my $stat = $statushash->{$chain};
3834         die "internal error" if !$stat;
3835
3836         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3837             $cmdlist .= "-F $chain\n";
3838             foreach my $cmd (@{$ruleset->{$chain}}) {
3839                 $cmdlist .= "$cmd\n";
3840             }
3841             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3842         } elsif ($stat->{action} eq 'delete') {
3843             die "internal error"; # this should not happen
3844         } elsif ($stat->{action} eq 'exists') {
3845             # do nothing
3846         } else {
3847             die "internal error - unknown status '$stat->{action}'";
3848         }
3849     }
3850
3851     foreach my $chain (keys %$statushash) {
3852         next if $statushash->{$chain}->{action} ne 'delete';
3853         $cmdlist .= "-F $chain\n";
3854     }
3855     foreach my $chain (keys %$statushash) {
3856         next if $statushash->{$chain}->{action} ne 'delete';
3857         next if $chain eq 'PVEFW-INPUT';
3858         next if $chain eq 'PVEFW-OUTPUT';
3859         next if $chain eq 'PVEFW-FORWARD';
3860         $cmdlist .= "-X $chain\n";
3861     }
3862
3863     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3864
3865     $cmdlist .= "COMMIT\n";
3866
3867     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3868 }
3869
3870 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3871
3872 sub get_ebtables_cmdlist {
3873     my ($ruleset, $verbose) = @_;
3874
3875     my $changes = 0;
3876     my $cmdlist = "*filter\n";
3877
3878     my $active_chains = ebtables_get_chains();
3879     my $statushash = get_ruleset_status($ruleset, $active_chains,
3880                                         \&iptables_chain_digest, $verbose,
3881                                         $pve_ebtables_chainname_regex);
3882
3883     # create chains first and make sure PVE rules are evaluated if active
3884     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3885     my $pve_include = 0;
3886     foreach my $chain (sort keys %$statushash) {
3887         next if ($statushash->{$chain}->{action} eq 'delete');
3888         $cmdlist .= ":$chain ACCEPT\n";
3889         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3890     }
3891
3892     foreach my $chain (sort keys %$statushash) {
3893         my $stat = $statushash->{$chain};
3894         next if ($stat->{action} eq 'delete');
3895         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3896
3897         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3898             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3899                 next if ! $pve_include;
3900                 $pve_include = 0;
3901             }
3902             $cmdlist .= "$cmd\n";
3903         }
3904     }
3905     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
3906
3907     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3908 }
3909
3910 sub get_ipset_cmdlist {
3911     my ($ruleset, $verbose) = @_;
3912
3913     my $cmdlist = "";
3914
3915     my $delete_cmdlist = "";
3916
3917     my $active_chains = ipset_get_chains();
3918     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3919
3920     # remove stale _swap chains
3921     foreach my $chain (keys %$active_chains) {
3922         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3923             $cmdlist .= "destroy $chain\n";
3924         }
3925     }
3926
3927     foreach my $chain (keys %$ruleset) {
3928         my $stat = $statushash->{$chain};
3929         die "internal error" if !$stat;
3930
3931         if ($stat->{action} eq 'create') {
3932             foreach my $cmd (@{$ruleset->{$chain}}) {
3933                 $cmdlist .= "$cmd\n";
3934             }
3935         }
3936     }
3937
3938     foreach my $chain (keys %$ruleset) {
3939         my $stat = $statushash->{$chain};
3940         die "internal error" if !$stat;
3941
3942         if ($stat->{action} eq 'update') {
3943             my $chain_swap = $chain."_swap";
3944
3945             foreach my $cmd (@{$ruleset->{$chain}}) {
3946                 $cmd =~ s/$chain/$chain_swap/;
3947                 $cmdlist .= "$cmd\n";
3948             }
3949             $cmdlist .= "swap $chain_swap $chain\n";
3950             $cmdlist .= "flush $chain_swap\n";
3951             $cmdlist .= "destroy $chain_swap\n";
3952         }
3953     }
3954
3955      # the remove unused chains
3956     foreach my $chain (keys %$statushash) {
3957         next if $statushash->{$chain}->{action} ne 'delete';
3958
3959         $delete_cmdlist .= "flush $chain\n";
3960         $delete_cmdlist .= "destroy $chain\n";
3961     }
3962
3963     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3964
3965     return ($cmdlist, $delete_cmdlist, $changes);
3966 }
3967
3968 sub apply_ruleset {
3969     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
3970
3971     enable_bridge_firewall();
3972
3973     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3974         get_ipset_cmdlist($ipset_ruleset, $verbose);
3975
3976     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3977     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3978     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
3979
3980     if ($verbose) {
3981         if ($ipset_changes) {
3982             print "ipset changes:\n";
3983             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3984             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3985         }
3986
3987         if ($changes) {
3988             print "iptables changes:\n";
3989             print $cmdlist;
3990         }
3991
3992         if ($changesv6) {
3993             print "ip6tables changes:\n";
3994             print $cmdlistv6;
3995         }
3996
3997         if ($ebtables_changes) {
3998             print "ebtables changes:\n";
3999             print $ebtables_cmdlist;
4000         }
4001     }
4002
4003     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4004     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4005
4006     ipset_restore_cmdlist($ipset_create_cmdlist);
4007
4008     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4009     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4010
4011     iptables_restore_cmdlist($cmdlist);
4012
4013     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4014     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4015
4016     ip6tables_restore_cmdlist($cmdlistv6);
4017
4018     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4019     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4020
4021     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4022
4023     ebtables_restore_cmdlist($ebtables_cmdlist);
4024
4025     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4026     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4027
4028     # test: re-read status and check if everything is up to date
4029     my $active_chains = iptables_get_chains();
4030     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
4031
4032     my $errors;
4033     foreach my $chain (sort keys %$ruleset) {
4034         my $stat = $statushash->{$chain};
4035         if ($stat->{action} ne 'exists') {
4036             warn "unable to update chain '$chain'\n";
4037             $errors = 1;
4038         }
4039     }
4040
4041     my $active_chainsv6 = iptables_get_chains("ip6tables");
4042     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
4043
4044     foreach my $chain (sort keys %$rulesetv6) {
4045         my $stat = $statushashv6->{$chain};
4046         if ($stat->{action} ne 'exists') {
4047             warn "unable to update chain '$chain'\n";
4048             $errors = 1;
4049         }
4050     }
4051
4052     my $active_ebtables_chains = ebtables_get_chains();
4053     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4054                                 $active_ebtables_chains, \&iptables_chain_digest,
4055                                 0, $pve_ebtables_chainname_regex);
4056
4057     foreach my $chain (sort keys %$ebtables_ruleset) {
4058         my $stat = $ebtables_statushash->{$chain};
4059         if ($stat->{action} ne 'exists') {
4060             warn "ebtables : unable to update chain '$chain'\n";
4061             $errors = 1;
4062         }
4063     }
4064
4065     die "unable to apply firewall changes\n" if $errors;
4066
4067     update_nf_conntrack_max($hostfw_conf);
4068
4069     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4070
4071 }
4072
4073 sub update_nf_conntrack_max {
4074     my ($hostfw_conf) = @_;
4075
4076     my $max = 65536; # reasonable default
4077
4078     my $options = $hostfw_conf->{options} || {};
4079
4080     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4081         $max = $options->{nf_conntrack_max};
4082         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4083     }
4084
4085     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4086     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4087
4088     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4089
4090     if ($current != $max) {
4091         my $hashsize = int($max/4);
4092         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4093         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4094     }
4095 }
4096
4097 sub update_nf_conntrack_tcp_timeout_established {
4098     my ($hostfw_conf) = @_;
4099
4100     my $options = $hostfw_conf->{options} || {};
4101
4102     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4103
4104     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4105 }
4106
4107 sub remove_pvefw_chains {
4108
4109     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4110     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4111     PVE::Firewall::remove_pvefw_chains_ipset();
4112
4113 }
4114
4115 sub remove_pvefw_chains_iptables {
4116     my ($iptablescmd) = @_;
4117
4118     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4119     my $cmdlist = "*filter\n";
4120
4121     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4122         if ($hooks->{$h}) {
4123             $cmdlist .= "-D $h -j PVEFW-$h\n";
4124         }
4125     }
4126
4127     foreach my $chain (keys %$chash) {
4128         $cmdlist .= "-F $chain\n";
4129     }
4130
4131     foreach my $chain (keys %$chash) {
4132         $cmdlist .= "-X $chain\n";
4133     }
4134     $cmdlist .= "COMMIT\n";
4135
4136     if($iptablescmd eq "ip6tables") {
4137         ip6tables_restore_cmdlist($cmdlist);
4138     } else {
4139         iptables_restore_cmdlist($cmdlist);
4140     }
4141 }
4142
4143 sub remove_pvefw_chains_ipset {
4144
4145     my $ipset_chains = ipset_get_chains();
4146
4147     my $cmdlist = "";
4148
4149     foreach my $chain (keys %$ipset_chains) {
4150         $cmdlist .= "flush $chain\n";
4151         $cmdlist .= "destroy $chain\n";
4152     }
4153
4154     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4155 }
4156
4157 sub init {
4158     my $cluster_conf = load_clusterfw_conf();
4159     my $cluster_options = $cluster_conf->{options};
4160     my $enable = $cluster_options->{enable};
4161
4162     return if !$enable;
4163
4164     # load required modules here
4165 }
4166
4167 sub update {
4168     my $code = sub {
4169
4170         my $cluster_conf = load_clusterfw_conf();
4171         my $cluster_options = $cluster_conf->{options};
4172
4173         if (!$cluster_options->{enable}) {
4174             PVE::Firewall::remove_pvefw_chains();
4175             return;
4176         }
4177
4178         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4179
4180         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4181
4182         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4183     };
4184
4185     run_locked($code);
4186 }
4187
4188 1;