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 my $global_log_ratelimit = '--limit 1/sec';
 135
 136 my $log_level_hash = {
 137     debug => 7,
 138     info => 6,
 139     notice => 5,
 140     warning => 4,
 141     err => 3,
 142     crit => 2,
 143     alert => 1,
 144     emerg => 0,
 145 };
 146
 147 my $verbose = 0;
 148 sub set_verbose {
 149     $verbose = shift;
 150 }
 151
 152 # %rule
 153 #
 154 # name => optional
 155 # enable => [0|1]
 156 # action =>
 157 # proto =>
 158 # sport => port[,port[,port]].. or port:port
 159 # dport => port[,port[,port]].. or port:port
 160 # log => optional, loglevel
 161 # logmsg => optional, logmsg - overwrites default
 162 # iface_in => incomin interface
 163 # iface_out => outgoing interface
 164 # match => optional, overwrites generation of match
 165 # target => optional, overwrites action
 166
 167 # we need to overwrite some macros for ipv6
 168 my $pve_ipv6fw_macros = {
 169     'Ping' => [
 170         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 171     ],
 172     'NeighborDiscovery' => [
 173         "IPv6 neighbor solicitation, neighbor and router advertisement",
 174         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 175         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 176         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 177         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 178     ],
 179     'DHCPv6' => [
 180         "DHCPv6 traffic",
 181         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 182     ],
 183     'Trcrt' => [
 184         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 185         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 186     ],
 187  };
 188
 189 # imported/converted from: /usr/share/shorewall/macro.*
 190 my $pve_fw_macros = {
 191     'Amanda' => [
 192         "Amanda Backup",
 193         { action => 'PARAM', proto => 'udp', dport => '10080' },
 194         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 195     ],
 196     'Auth' => [
 197         "Auth (identd) traffic",
 198         { action => 'PARAM', proto => 'tcp', dport => '113' },
 199     ],
 200     'BGP' => [
 201         "Border Gateway Protocol traffic",
 202         { action => 'PARAM', proto => 'tcp', dport => '179' },
 203     ],
 204     'BitTorrent' => [
 205         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 206         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 207         { action => 'PARAM', proto => 'udp', dport => '6881' },
 208     ],
 209     'BitTorrent32' => [
 210         "BitTorrent traffic for BitTorrent 3.2 and later",
 211         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 212         { action => 'PARAM', proto => 'udp', dport => '6881' },
 213     ],
 214     'Ceph' => [
 215         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 216         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 217         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 218     ],
 219     'CVS' => [
 220         "Concurrent Versions System pserver traffic",
 221         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 222     ],
 223     'Citrix' => [
 224         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 225         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 226         { action => 'PARAM', proto => 'udp', dport => '1604' },
 227         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 228     ],
 229     'DAAP' => [
 230         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 231         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 232         { action => 'PARAM', proto => 'udp', dport => '3689' },
 233     ],
 234     'DCC' => [
 235         "Distributed Checksum Clearinghouse spam filtering mechanism",
 236         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 237     ],
 238     'DHCPfwd' => [
 239         "Forwarded DHCP traffic",
 240         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 241     ],
 242     'DNS' => [
 243         "Domain Name System traffic (upd and tcp)",
 244         { action => 'PARAM', proto => 'udp', dport => '53' },
 245         { action => 'PARAM', proto => 'tcp', dport => '53' },
 246     ],
 247     'Distcc' => [
 248         "Distributed Compiler service",
 249         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 250     ],
 251     'FTP' => [
 252         "File Transfer Protocol",
 253         { action => 'PARAM', proto => 'tcp', dport => '21' },
 254     ],
 255     'Finger' => [
 256         "Finger protocol (RFC 742)",
 257         { action => 'PARAM', proto => 'tcp', dport => '79' },
 258     ],
 259     'GNUnet' => [
 260         "GNUnet secure peer-to-peer networking traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 262         { action => 'PARAM', proto => 'udp', dport => '2086' },
 263         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 264         { action => 'PARAM', proto => 'udp', dport => '1080' },
 265     ],
 266     'GRE' => [
 267         "Generic Routing Encapsulation tunneling protocol",
 268         { action => 'PARAM', proto => '47' },
 269     ],
 270     'Git' => [
 271         "Git distributed revision control traffic",
 272         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 273     ],
 274     'HKP' => [
 275         "OpenPGP HTTP keyserver protocol traffic",
 276         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 277     ],
 278     'HTTP' => [
 279         "Hypertext Transfer Protocol (WWW)",
 280         { action => 'PARAM', proto => 'tcp', dport => '80' },
 281     ],
 282     'HTTPS' => [
 283         "Hypertext Transfer Protocol (WWW) over SSL",
 284         { action => 'PARAM', proto => 'tcp', dport => '443' },
 285     ],
 286     'ICPV2' => [
 287         "Internet Cache Protocol V2 (Squid) traffic",
 288         { action => 'PARAM', proto => 'udp', dport => '3130' },
 289     ],
 290     'ICQ' => [
 291         "AOL Instant Messenger traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 293     ],
 294     'IMAP' => [
 295         "Internet Message Access Protocol",
 296         { action => 'PARAM', proto => 'tcp', dport => '143' },
 297     ],
 298     'IMAPS' => [
 299         "Internet Message Access Protocol over SSL",
 300         { action => 'PARAM', proto => 'tcp', dport => '993' },
 301     ],
 302     'IPIP' => [
 303         "IPIP capsulation traffic",
 304         { action => 'PARAM', proto => '94' },
 305     ],
 306     'IPsec' => [
 307         "IPsec traffic",
 308         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 309         { action => 'PARAM', proto => '50' },
 310     ],
 311     'IPsecah' => [
 312         "IPsec authentication (AH) traffic",
 313         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 314         { action => 'PARAM', proto => '51' },
 315     ],
 316     'IPsecnat' => [
 317         "IPsec traffic and Nat-Traversal",
 318         { action => 'PARAM', proto => 'udp', dport => '500' },
 319         { action => 'PARAM', proto => 'udp', dport => '4500' },
 320         { action => 'PARAM', proto => '50' },
 321     ],
 322     'IRC' => [
 323         "Internet Relay Chat traffic",
 324         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 325     ],
 326     'Jetdirect' => [
 327         "HP Jetdirect printing",
 328         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 329     ],
 330     'L2TP' => [
 331         "Layer 2 Tunneling Protocol traffic",
 332         { action => 'PARAM', proto => 'udp', dport => '1701' },
 333     ],
 334     'LDAP' => [
 335         "Lightweight Directory Access Protocol traffic",
 336         { action => 'PARAM', proto => 'tcp', dport => '389' },
 337     ],
 338     'LDAPS' => [
 339         "Secure Lightweight Directory Access Protocol traffic",
 340         { action => 'PARAM', proto => 'tcp', dport => '636' },
 341     ],
 342     'MSNP' => [
 343         "Microsoft Notification Protocol",
 344         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 345     ],
 346     'MSSQL' => [
 347         "Microsoft SQL Server",
 348         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 349     ],
 350     'Mail' => [
 351         "Mail traffic (SMTP, SMTPS, Submission)",
 352         { action => 'PARAM', proto => 'tcp', dport => '25' },
 353         { action => 'PARAM', proto => 'tcp', dport => '465' },
 354         { action => 'PARAM', proto => 'tcp', dport => '587' },
 355     ],
 356     'MDNS' => [
 357         "Multicast DNS",
 358         { action => 'PARAM', proto => 'udp', dport => '5353' },
 359     ],
 360     'Munin' => [
 361         "Munin networked resource monitoring traffic",
 362         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 363     ],
 364     'MySQL' => [
 365         "MySQL server",
 366         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 367     ],
 368     'NNTP' => [
 369         "NNTP traffic (Usenet).",
 370         { action => 'PARAM', proto => 'tcp', dport => '119' },
 371     ],
 372     'NNTPS' => [
 373         "Encrypted NNTP traffic (Usenet)",
 374         { action => 'PARAM', proto => 'tcp', dport => '563' },
 375     ],
 376     'NTP' => [
 377         "Network Time Protocol (ntpd)",
 378         { action => 'PARAM', proto => 'udp', dport => '123' },
 379     ],
 380     'OSPF' => [
 381         "OSPF multicast traffic",
 382         { action => 'PARAM', proto => '89' },
 383     ],
 384     'OpenVPN' => [
 385         "OpenVPN traffic",
 386         { action => 'PARAM', proto => 'udp', dport => '1194' },
 387     ],
 388     'PCA' => [
 389         "Symantec PCAnywere (tm)",
 390         { action => 'PARAM', proto => 'udp', dport => '5632' },
 391         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 392     ],
 393     'POP3' => [
 394         "POP3 traffic",
 395         { action => 'PARAM', proto => 'tcp', dport => '110' },
 396     ],
 397     'POP3S' => [
 398         "Encrypted POP3 traffic",
 399         { action => 'PARAM', proto => 'tcp', dport => '995' },
 400     ],
 401     'PPtP' => [
 402         "Point-to-Point Tunneling Protocol",
 403         { action => 'PARAM', proto => '47' },
 404         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 405     ],
 406     'Ping' => [
 407         "ICMP echo request",
 408         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 409     ],
 410     'PostgreSQL' => [
 411         "PostgreSQL server",
 412         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 413     ],
 414     'Printer' => [
 415         "Line Printer protocol printing",
 416         { action => 'PARAM', proto => 'tcp', dport => '515' },
 417     ],
 418     'RDP' => [
 419         "Microsoft Remote Desktop Protocol traffic",
 420         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 421     ],
 422     'RIP' => [
 423         "Routing Information Protocol (bidirectional)",
 424         { action => 'PARAM', proto => 'udp', dport => '520' },
 425     ],
 426     'RNDC' => [
 427         "BIND remote management protocol",
 428         { action => 'PARAM', proto => 'tcp', dport => '953' },
 429     ],
 430     'Razor' => [
 431         "Razor Antispam System",
 432         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 433     ],
 434     'Rdate' => [
 435         "Remote time retrieval (rdate)",
 436         { action => 'PARAM', proto => 'tcp', dport => '37' },
 437     ],
 438     'Rsync' => [
 439         "Rsync server",
 440         { action => 'PARAM', proto => 'tcp', dport => '873' },
 441     ],
 442     'SANE' => [
 443         "SANE network scanning",
 444         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 445     ],
 446     'SMB' => [
 447         "Microsoft SMB traffic",
 448         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 449         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 450         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 451         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 452     ],
 453     'SMBswat' => [
 454         "Samba Web Administration Tool",
 455         { action => 'PARAM', proto => 'tcp', dport => '901' },
 456     ],
 457     'SMTP' => [
 458         "Simple Mail Transfer Protocol",
 459         { action => 'PARAM', proto => 'tcp', dport => '25' },
 460     ],
 461     'SMTPS' => [
 462         "Encrypted Simple Mail Transfer Protocol",
 463         { action => 'PARAM', proto => 'tcp', dport => '465' },
 464     ],
 465     'SNMP' => [
 466         "Simple Network Management Protocol",
 467         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 468         { action => 'PARAM', proto => 'tcp', dport => '161' },
 469     ],
 470     'SPAMD' => [
 471         "Spam Assassin SPAMD traffic",
 472         { action => 'PARAM', proto => 'tcp', dport => '783' },
 473     ],
 474     'SSH' => [
 475         "Secure shell traffic",
 476         { action => 'PARAM', proto => 'tcp', dport => '22' },
 477     ],
 478     'SVN' => [
 479         "Subversion server (svnserve)",
 480         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 481     ],
 482     'SixXS' => [
 483         "SixXS IPv6 Deployment and Tunnel Broker",
 484         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 485         { action => 'PARAM', proto => 'udp', dport => '3740' },
 486         { action => 'PARAM', proto => '41' },
 487         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 488     ],
 489     'Squid' => [
 490         "Squid web proxy traffic",
 491         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 492     ],
 493     'Submission' => [
 494         "Mail message submission traffic",
 495         { action => 'PARAM', proto => 'tcp', dport => '587' },
 496     ],
 497     'Syslog' => [
 498         "Syslog protocol (RFC 5424) traffic",
 499         { action => 'PARAM', proto => 'udp', dport => '514' },
 500         { action => 'PARAM', proto => 'tcp', dport => '514' },
 501     ],
 502     'TFTP' => [
 503         "Trivial File Transfer Protocol traffic",
 504         { action => 'PARAM', proto => 'udp', dport => '69' },
 505     ],
 506     'Telnet' => [
 507         "Telnet traffic",
 508         { action => 'PARAM', proto => 'tcp', dport => '23' },
 509     ],
 510     'Telnets' => [
 511         "Telnet over SSL",
 512         { action => 'PARAM', proto => 'tcp', dport => '992' },
 513     ],
 514     'Time' => [
 515         "RFC 868 Time protocol",
 516         { action => 'PARAM', proto => 'tcp', dport => '37' },
 517     ],
 518     'Trcrt' => [
 519         "Traceroute (for up to 30 hops) traffic",
 520         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 521         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 522     ],
 523     'VNC' => [
 524         "VNC traffic for VNC display's 0 - 99",
 525         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 526     ],
 527     'VNCL' => [
 528         "VNC traffic from Vncservers to Vncviewers in listen mode",
 529         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 530     ],
 531     'Web' => [
 532         "WWW traffic (HTTP and HTTPS)",
 533         { action => 'PARAM', proto => 'tcp', dport => '80' },
 534         { action => 'PARAM', proto => 'tcp', dport => '443' },
 535     ],
 536     'Webcache' => [
 537         "Web Cache/Proxy traffic (port 8080)",
 538         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 539     ],
 540     'Webmin' => [
 541         "Webmin traffic",
 542         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 543     ],
 544     'Whois' => [
 545         "Whois (nicname, RFC 3912) traffic",
 546         { action => 'PARAM', proto => 'tcp', dport => '43' },
 547     ],
 548 };
 549
 550 my $pve_fw_parsed_macros;
 551 my $pve_fw_macro_descr;
 552 my $pve_fw_macro_ipversion = {};
 553 my $pve_fw_preferred_macro_names = {};
 554
 555 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 556 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 557
 558 my $pve_std_chains = {};
 559 my $pve_std_chains_conf = {};
 560 $pve_std_chains_conf->{4} = {
 561     'PVEFW-SET-ACCEPT-MARK' => [
 562         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 563     ],
 564     'PVEFW-DropBroadcast' => [
 565         # same as shorewall 'Broadcast'
 566         # simply DROP BROADCAST/MULTICAST/ANYCAST
 567         # we can use this to reduce logging
 568         { action => 'DROP', dsttype => 'BROADCAST' },
 569         { action => 'DROP', dsttype => 'MULTICAST' },
 570         { action => 'DROP', dsttype => 'ANYCAST' },
 571         { action => 'DROP', dest => '224.0.0.0/4' },
 572     ],
 573     'PVEFW-reject' => [
 574         # same as shorewall 'reject'
 575         { action => 'DROP', dsttype => 'BROADCAST' },
 576         { action => 'DROP', source => '224.0.0.0/4' },
 577         { action => 'DROP', proto => 'icmp' },
 578         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 579         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 580         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 581         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 582     ],
 583     'PVEFW-Drop' => [
 584         # same as shorewall 'Drop', which is equal to DROP,
 585         # but REJECT/DROP some packages to reduce logging,
 586         # and ACCEPT critical ICMP types
 587         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 588         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 589         { action => 'PVEFW-DropBroadcast' },
 590         # ACCEPT critical ICMP types
 591         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 592         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 593         # Drop packets with INVALID state
 594         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 595         # Drop Microsoft SMB noise
 596         { action => 'DROP', proto => 'udp', dport => '135,445' },
 597         { action => 'DROP', proto => 'udp', dport => '137:139' },
 598         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 599         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 600         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 601         # Drop new/NotSyn traffic so that it doesn't get logged
 602         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 603         # Drop DNS replies
 604         { action => 'DROP', proto => 'udp', sport => 53 },
 605     ],
 606     'PVEFW-Reject' => [
 607         # same as shorewall 'Reject', which is equal to Reject,
 608         # but REJECT/DROP some packages to reduce logging,
 609         # and ACCEPT critical ICMP types
 610         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 611         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 612         { action => 'PVEFW-DropBroadcast' },
 613         # ACCEPT critical ICMP types
 614         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 615         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 616         # Drop packets with INVALID state
 617         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 618         # Drop Microsoft SMB noise
 619         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 620         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 621         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 622         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 623         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 624         # Drop new/NotSyn traffic so that it doesn't get logged
 625         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 626         # Drop DNS replies
 627         { action => 'DROP', proto => 'udp', sport => 53 },
 628     ],
 629     'PVEFW-tcpflags' => [
 630         # same as shorewall tcpflags action.
 631         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 632         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 633         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 634         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 635         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 636         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 637     ],
 638     'PVEFW-smurfs' => [
 639         # same as shorewall smurfs action
 640         # Filter packets for smurfs (packets with a broadcast address as the source).
 641         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 642         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 643         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 644     ],
 645     'PVEFW-smurflog' => [
 646         { action => 'DROP', logmsg => 'DROP: ' },
 647     ],
 648     'PVEFW-logflags' => [
 649         { action => 'DROP', logmsg => 'DROP: ' },
 650     ],
 651 };
 652
 653 $pve_std_chains_conf->{6} = {
 654     'PVEFW-SET-ACCEPT-MARK' => [
 655         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 656     ],
 657     'PVEFW-DropBroadcast' => [
 658         # same as shorewall 'Broadcast'
 659         # simply DROP BROADCAST/MULTICAST/ANYCAST
 660         # we can use this to reduce logging
 661         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 662         # ipv6 addrtype does not work with kernel 2.6.32
 663         #{ action => 'DROP', dsttype => 'MULTICAST' },
 664         #{ action => 'DROP', dsttype => 'ANYCAST' },
 665         { action => 'DROP', dest => 'ff00::/8' },
 666         #{ action => 'DROP', dest => '224.0.0.0/4' },
 667     ],
 668     'PVEFW-reject' => [
 669         # same as shorewall 'reject'
 670         #{ action => 'DROP', dsttype => 'BROADCAST' },
 671         #{ action => 'DROP', source => '224.0.0.0/4' },
 672         { action => 'DROP', proto => 'icmpv6' },
 673         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 674         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 675         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 676         #"-j REJECT --reject-with icmp-host-prohibited",
 677     ],
 678     'PVEFW-Drop' => [
 679         # same as shorewall 'Drop', which is equal to DROP,
 680         # but REJECT/DROP some packages to reduce logging,
 681         # and ACCEPT critical ICMP types
 682         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 683         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 684         { action => 'PVEFW-DropBroadcast' },
 685         # ACCEPT critical ICMP types
 686         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 687         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 688         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 689         # Drop packets with INVALID state
 690         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 691         # Drop Microsoft SMB noise
 692         { action => 'DROP', proto => 'udp', dport => '135,445' },
 693         { action => 'DROP', proto => 'udp', dport => '137:139'},
 694         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 695         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 696         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 697         # Drop new/NotSyn traffic so that it doesn't get logged
 698         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 699         # Drop DNS replies
 700         { action => 'DROP', proto => 'udp', sport => 53 },
 701     ],
 702     'PVEFW-Reject' => [
 703         # same as shorewall 'Reject', which is equal to Reject,
 704         # but REJECT/DROP some packages to reduce logging,
 705         # and ACCEPT critical ICMP types
 706         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 707         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 708         { action => 'PVEFW-DropBroadcast' },
 709         # ACCEPT critical ICMP types
 710         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 711         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 712         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 713         # Drop packets with INVALID state
 714         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 715         # Drop Microsoft SMB noise
 716         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 717         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 718         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 719         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 720         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 721         # Drop new/NotSyn traffic so that it doesn't get logged
 722         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 723         # Drop DNS replies
 724         { action => 'DROP', proto => 'udp', sport => 53 },
 725     ],
 726     'PVEFW-tcpflags' => [
 727         # same as shorewall tcpflags action.
 728         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 729         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 730         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 731         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 732         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 733         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 734     ],
 735     'PVEFW-logflags' => [
 736         { action => 'DROP', logmsg => 'DROP: ' },
 737     ],
 738 };
 739
 740 # iptables -p icmp -h
 741 my $icmp_type_names = {
 742     any => 1,
 743     'echo-reply' => 1,
 744     'destination-unreachable' => 1,
 745     'network-unreachable' => 1,
 746     'host-unreachable' => 1,
 747     'protocol-unreachable' => 1,
 748     'port-unreachable' => 1,
 749     'fragmentation-needed' => 1,
 750     'source-route-failed' => 1,
 751     'network-unknown' => 1,
 752     'host-unknown' => 1,
 753     'network-prohibited' => 1,
 754     'host-prohibited' => 1,
 755     'TOS-network-unreachable' => 1,
 756     'TOS-host-unreachable' => 1,
 757     'communication-prohibited' => 1,
 758     'host-precedence-violation' => 1,
 759     'precedence-cutoff' => 1,
 760     'source-quench' => 1,
 761     'redirect' => 1,
 762     'network-redirect' => 1,
 763     'host-redirect' => 1,
 764     'TOS-network-redirect' => 1,
 765     'TOS-host-redirect' => 1,
 766     'echo-request' => 1,
 767     'router-advertisement' => 1,
 768     'router-solicitation' => 1,
 769     'time-exceeded' => 1,
 770     'ttl-zero-during-transit' => 1,
 771     'ttl-zero-during-reassembly' => 1,
 772     'parameter-problem' => 1,
 773     'ip-header-bad' => 1,
 774     'required-option-missing' => 1,
 775     'timestamp-request' => 1,
 776     'timestamp-reply' => 1,
 777     'address-mask-request' => 1,
 778     'address-mask-reply' => 1,
 779 };
 780
 781 # ip6tables -p icmpv6 -h
 782
 783 my $icmpv6_type_names = {
 784     'any' => 1,
 785     'destination-unreachable' => 1,
 786     'no-route' => 1,
 787     'communication-prohibited' => 1,
 788     'address-unreachable' => 1,
 789     'port-unreachable' => 1,
 790     'packet-too-big' => 1,
 791     'time-exceeded' => 1,
 792     'ttl-zero-during-transit' => 1,
 793     'ttl-zero-during-reassembly' => 1,
 794     'parameter-problem' => 1,
 795     'bad-header' => 1,
 796     'unknown-header-type' => 1,
 797     'unknown-option' => 1,
 798     'echo-request' => 1,
 799     'echo-reply' => 1,
 800     'router-solicitation' => 1,
 801     'router-advertisement' => 1,
 802     'neighbor-solicitation' => 1,
 803     'neighbour-solicitation' => 1,
 804     'neighbor-advertisement' => 1,
 805     'neighbour-advertisement' => 1,
 806     'redirect' => 1,
 807 };
 808
 809 sub init_firewall_macros {
 810
 811     $pve_fw_parsed_macros = {};
 812
 813     my $parse = sub {
 814         my ($k, $macro) = @_;
 815         my $lc_name = lc($k);
 816         $pve_fw_macro_ipversion->{$k} = 0;
 817         while (!ref($macro->[0])) {
 818             my $desc = shift @$macro;
 819             if ($desc eq 'ipv4only') {
 820                 $pve_fw_macro_ipversion->{$k} = 4;
 821             } elsif ($desc eq 'ipv6only') {
 822                 $pve_fw_macro_ipversion->{$k} = 6;
 823             } else {
 824                 $pve_fw_macro_descr->{$k} = $desc;
 825             }
 826         }
 827         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 828         $pve_fw_parsed_macros->{$k} = $macro;
 829     };
 830
 831     foreach my $k (keys %$pve_fw_macros) {
 832         &$parse($k, $pve_fw_macros->{$k});
 833     }
 834
 835     foreach my $k (keys %$pve_ipv6fw_macros) {
 836         next if $pve_fw_parsed_macros->{$k};
 837         &$parse($k, $pve_ipv6fw_macros->{$k});
 838         $pve_fw_macro_ipversion->{$k} = 6;
 839     }
 840 }
 841
 842 init_firewall_macros();
 843
 844 sub get_macros {
 845     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 846 }
 847
 848 my $etc_services;
 849
 850 sub get_etc_services {
 851
 852     return $etc_services if $etc_services;
 853
 854     my $filename = "/etc/services";
 855
 856     my $fh = IO::File->new($filename, O_RDONLY);
 857     if (!$fh) {
 858         warn "unable to read '$filename' - $!\n";
 859         return {};
 860     }
 861
 862     my $services = {};
 863
 864     while (my $line = <$fh>) {
 865         chomp ($line);
 866         next if $line =~m/^#/;
 867         next if ($line =~m/^\s*$/);
 868
 869         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 870             $services->{byid}->{$2}->{name} = $1;
 871             $services->{byid}->{$2}->{port} = $2;
 872             $services->{byid}->{$2}->{$3} = 1;
 873             $services->{byname}->{$1} = $services->{byid}->{$2};
 874         }
 875     }
 876
 877     close($fh);
 878
 879     $etc_services = $services;
 880
 881
 882     return $etc_services;
 883 }
 884
 885 sub parse_protocol_file {
 886     my ($filename) = @_;
 887
 888     my $fh = IO::File->new($filename, O_RDONLY);
 889     if (!$fh) {
 890         warn "unable to read '$filename' - $!\n";
 891         return {};
 892     }
 893
 894     my $protocols = {};
 895
 896     while (my $line = <$fh>) {
 897         chomp ($line);
 898         next if $line =~m/^#/;
 899         next if ($line =~m/^\s*$/);
 900
 901         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 902             $protocols->{byid}->{$2}->{name} = $1;
 903             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 904         }
 905     }
 906
 907     close($fh);
 908
 909     return $protocols;
 910 }
 911
 912 my $etc_protocols;
 913
 914 sub get_etc_protocols {
 915     return $etc_protocols if $etc_protocols;
 916
 917     my $protocols = parse_protocol_file('/etc/protocols');
 918
 919     # add special case for ICMP v6
 920     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 921     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 922
 923     $etc_protocols = $protocols;
 924
 925     return $etc_protocols;
 926 }
 927
 928 my $etc_ethertypes;
 929
 930 sub get_etc_ethertypes {
 931     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 932         if !$etc_ethertypes;
 933     return $etc_ethertypes;
 934 }
 935
 936 my $__local_network;
 937
 938 sub local_network {
 939     my ($new_value) = @_;
 940
 941     $__local_network = $new_value if defined($new_value);
 942
 943     return $__local_network if defined($__local_network);
 944
 945     eval {
 946         my $nodename = PVE::INotify::nodename();
 947
 948         my $ip = PVE::Cluster::remote_node_ip($nodename);
 949
 950         my $testip = Net::IP->new($ip);
 951
 952         my $isv6 = $testip->version == 6;
 953         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 954                            : PVE::ProcFSTools::read_proc_net_route();
 955         foreach my $entry (@$routes) {
 956             my $mask;
 957             if ($isv6) {
 958                 $mask = $entry->{prefix};
 959                 next if !$mask; # skip the default route...
 960             } else {
 961                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 962                 next if !defined($mask);
 963             }
 964             my $cidr = "$entry->{dest}/$mask";
 965             my $testnet = Net::IP->new($cidr);
 966             my $overlap = $testnet->overlaps($testip);
 967             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 968                 $overlap == $Net::IP::IP_IDENTICAL)
 969             {
 970                 $__local_network = $cidr;
 971                 return;
 972             }
 973         }
 974     };
 975     warn $@ if $@;
 976
 977     return $__local_network;
 978 }
 979
 980 # ipset names are limited to 31 characters,
 981 # and we use '-v4' or '-v6' to indicate IP versions,
 982 # and we use '_swap' suffix for atomic update,
 983 # for example PVEFW-${VMID}-${ipset_name}_swap
 984
 985 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 986
 987 sub compute_ipset_chain_name {
 988     my ($vmid, $ipset_name, $ipversion) = @_;
 989
 990     $vmid = 0 if !defined($vmid);
 991
 992     my $id = "$vmid-${ipset_name}-v$ipversion";
 993
 994     if (length($id) > $max_iptables_ipset_name_length) {
 995         $id = PVE::Tools::fnv31a_hex($id);
 996     }
 997
 998     return "PVEFW-$id";
 999 }
1000
1001 sub compute_ipfilter_ipset_name {
1002     my ($iface) = @_;
1003
1004     return "ipfilter-$iface";
1005 }
1006
1007 sub parse_address_list {
1008     my ($str) = @_;
1009
1010     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1011         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1012         return;
1013     }
1014
1015     if ($str =~ m/^${ip_alias_pattern}$/) {
1016         die "alias name too long\n" if length($str) > $max_alias_name_length;
1017         return;
1018     }
1019
1020     my $count = 0;
1021     my $iprange = 0;
1022     my $ipversion;
1023
1024     my @elements = split(/,/, $str);
1025     die "extraneous commas in list\n" if $str ne join(',', @elements);
1026     foreach my $elem (@elements) {
1027         $count++;
1028         my $ip = Net::IP->new($elem);
1029         if (!$ip) {
1030             my $err = Net::IP::Error();
1031             die "invalid IP address: $err\n";
1032         }
1033         $iprange = 1 if $elem =~ m/-/;
1034
1035         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1036
1037         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1038             if $ipversion && ($new_ipversion != $ipversion);
1039
1040         $ipversion = $new_ipversion;
1041     }
1042
1043     die "you can't use a range in a list\n" if $iprange && $count > 1;
1044
1045     return $ipversion;
1046 }
1047
1048 sub parse_port_name_number_or_range {
1049     my ($str, $dport) = @_;
1050
1051     my $services = PVE::Firewall::get_etc_services();
1052     my $count = 0;
1053     my $icmp_port = 0;
1054
1055     my @elements = split(/,/, $str);
1056     die "extraneous commas in list\n" if $str ne join(',', @elements);
1057     foreach my $item (@elements) {
1058         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1059             $count += 2;
1060             my ($port1, $port2) = ($1, $2);
1061             die "invalid port '$port1'\n" if $port1 > 65535;
1062             die "invalid port '$port2'\n" if $port2 > 65535;
1063             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1064         } elsif ($item =~ m/^([0-9]+)$/) {
1065             $count += 1;
1066             my $port = $1;
1067             die "invalid port '$port'\n" if $port > 65535;
1068         } else {
1069             if ($dport && $icmp_type_names->{$item}) {
1070                 $icmp_port = 1;
1071             } elsif ($dport && $icmpv6_type_names->{$item}) {
1072                 $icmp_port = 1;
1073             } else {
1074                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1075             }
1076         }
1077     }
1078
1079     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1080
1081     # I really don't like to use the word number here, but it's the only thing
1082     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1083     # one and not as 100...
1084     die "too many entries in port list (> 15 numbers)\n"
1085         if $count > 15;
1086
1087     return (scalar(@elements) > 1);
1088 }
1089
1090 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1091 sub pve_fw_verify_sport_spec {
1092    my ($portstr) = @_;
1093
1094    parse_port_name_number_or_range($portstr, 0);
1095
1096    return $portstr;
1097 }
1098
1099 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1100 sub pve_fw_verify_dport_spec {
1101    my ($portstr) = @_;
1102
1103    parse_port_name_number_or_range($portstr, 1);
1104
1105    return $portstr;
1106 }
1107
1108 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1109 sub pve_fw_verify_addr_spec {
1110    my ($list) = @_;
1111
1112    parse_address_list($list);
1113
1114    return $list;
1115 }
1116
1117 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1118 sub pve_fw_verify_protocol_spec {
1119    my ($proto) = @_;
1120
1121    my $protocols = get_etc_protocols();
1122
1123    die "unknown protocol '$proto'\n" if $proto &&
1124        !(defined($protocols->{byname}->{$proto}) ||
1125          defined($protocols->{byid}->{$proto}));
1126
1127    return $proto;
1128 }
1129
1130
1131 # helper function for API
1132
1133 sub copy_opject_with_digest {
1134     my ($object) = @_;
1135
1136     my $sha = Digest::SHA->new('sha1');
1137
1138     my $res = {};
1139     foreach my $k (sort keys %$object) {
1140         my $v = $object->{$k};
1141         next if !defined($v);
1142         $res->{$k} = $v;
1143         $sha->add($k, ':', $v, "\n");
1144     }
1145
1146     my $digest = $sha->hexdigest;
1147
1148     $res->{digest} = $digest;
1149
1150     return wantarray ? ($res, $digest) : $res;
1151 }
1152
1153 sub copy_list_with_digest {
1154     my ($list) = @_;
1155
1156     my $sha = Digest::SHA->new('sha1');
1157
1158     my $res = [];
1159     foreach my $entry (@$list) {
1160         my $data = {};
1161         foreach my $k (sort keys %$entry) {
1162             my $v = $entry->{$k};
1163             next if !defined($v);
1164             $data->{$k} = $v;
1165             # Note: digest ignores refs ($rule->{errors})
1166             # since Digest::SHA expects a series of bytes,
1167             #  we have to encode the value here to prevent errors when
1168             #  using utf8 characters (eg. in comments)
1169             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1170         }
1171         push @$res, $data;
1172     }
1173
1174     my $digest = $sha->hexdigest;
1175
1176     foreach my $entry (@$res) {
1177         $entry->{digest} = $digest;
1178     }
1179
1180     return wantarray ? ($res, $digest) : $res;
1181 }
1182
1183 our $cluster_option_properties = {
1184     enable => {
1185         description => "Enable or disable the firewall cluster wide.",
1186         type => 'integer',
1187         minimum => 0,
1188         optional => 1,
1189     },
1190     ebtables => {
1191         description => "Enable ebtables rules cluster wide.",
1192         type => 'boolean',
1193         default => 1,
1194         optional => 1,
1195     },
1196     policy_in => {
1197         description => "Input policy.",
1198         type => 'string',
1199         optional => 1,
1200         enum => ['ACCEPT', 'REJECT', 'DROP'],
1201     },
1202     policy_out => {
1203         description => "Output policy.",
1204         type => 'string',
1205         optional => 1,
1206         enum => ['ACCEPT', 'REJECT', 'DROP'],
1207     },
1208     log_ratelimit => {
1209         description => "Log ratelimiting settings",
1210         type => 'string', format => {
1211             enable => {
1212                 default_key => 1,
1213                 description => 'Enable or disable log rate limiting',
1214                 type => 'boolean',
1215                 default => '1',
1216             },
1217             rate => {
1218                 type => 'string',
1219                 description => 'Frequency with which the burst bucket gets refilled',
1220                 optional => 1,
1221                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1222                 format_description => 'rate',
1223                 default => '1/second',
1224             },
1225             burst => {
1226                 type => 'integer',
1227                 minimum => 0,
1228                 optional => 1,
1229                 description => 'Inital burst of packages which will get logged',
1230                 default => 5,
1231             },
1232         },
1233         optional => 1,
1234     },
1235 };
1236
1237 our $host_option_properties = {
1238     enable => {
1239         description => "Enable host firewall rules.",
1240         type => 'boolean',
1241         optional => 1,
1242     },
1243     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1244         description => "Log level for incoming traffic." }),
1245     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1246         description => "Log level for outgoing traffic." }),
1247     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1248         description => "Log level for illegal tcp flags filter." }),
1249     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1250         description => "Log level for SMURFS filter." }),
1251     nosmurfs => {
1252         description => "Enable SMURFS filter.",
1253         type => 'boolean',
1254         optional => 1,
1255     },
1256     tcpflags => {
1257         description => "Filter illegal combinations of TCP flags.",
1258         type => 'boolean',
1259         optional => 1,
1260     },
1261     nf_conntrack_max => {
1262         description => "Maximum number of tracked connections.",
1263         type => 'integer',
1264         optional => 1,
1265         minimum => 32768,
1266     },
1267     nf_conntrack_tcp_timeout_established => {
1268         description => "Conntrack established timeout.",
1269         type => 'integer',
1270         optional => 1,
1271         minimum => 7875,
1272     },
1273     ndp => {
1274         description => "Enable NDP.",
1275         type => 'boolean',
1276         optional => 1,
1277     },
1278     nf_conntrack_allow_invalid => {
1279         description => "Allow invalid packets on connection tracking.",
1280         type => 'boolean',
1281         default => 0,
1282         optional => 1,
1283     },
1284     log_nf_conntrack => {
1285         description => "Enable logging of conntrack information.",
1286         type => 'boolean',
1287         default => 0,
1288         optional => 1
1289     },
1290 };
1291
1292 our $vm_option_properties = {
1293     enable => {
1294         description => "Enable/disable firewall rules.",
1295         type => 'boolean',
1296         optional => 1,
1297     },
1298     macfilter => {
1299         description => "Enable/disable MAC address filter.",
1300         type => 'boolean',
1301         optional => 1,
1302     },
1303     dhcp => {
1304         description => "Enable DHCP.",
1305         type => 'boolean',
1306         optional => 1,
1307     },
1308     ndp => {
1309         description => "Enable NDP.",
1310         type => 'boolean',
1311         optional => 1,
1312     },
1313     radv => {
1314         description => "Allow sending Router Advertisement.",
1315         type => 'boolean',
1316         optional => 1,
1317     },
1318     ipfilter => {
1319         description => "Enable default IP filters. " .
1320            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1321            "for every interface. Such ipsets implicitly contain sane default " .
1322            "restrictions such as restricting IPv6 link local addresses to " .
1323            "the one derived from the interface's MAC address. For containers " .
1324            "the configured IP addresses will be implicitly added.",
1325         type => 'boolean',
1326         optional => 1,
1327     },
1328     policy_in => {
1329         description => "Input policy.",
1330         type => 'string',
1331         optional => 1,
1332         enum => ['ACCEPT', 'REJECT', 'DROP'],
1333     },
1334     policy_out => {
1335         description => "Output policy.",
1336         type => 'string',
1337         optional => 1,
1338         enum => ['ACCEPT', 'REJECT', 'DROP'],
1339     },
1340     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1341         description => "Log level for incoming traffic." }),
1342     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1343         description => "Log level for outgoing traffic." }),
1344
1345 };
1346
1347
1348 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.";
1349
1350 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.";
1351
1352 my $rule_properties = {
1353     pos => {
1354         description => "Update rule at position <pos>.",
1355         type => 'integer',
1356         minimum => 0,
1357         optional => 1,
1358     },
1359     digest => get_standard_option('pve-config-digest'),
1360     type => {
1361         description => "Rule type.",
1362         type => 'string',
1363         optional => 1,
1364         enum => ['in', 'out', 'group'],
1365     },
1366     action => {
1367         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1368         type => 'string',
1369         optional => 1,
1370         pattern => $security_group_name_pattern,
1371         maxLength => 20,
1372         minLength => 2,
1373     },
1374     macro => {
1375         description => "Use predefined standard macro.",
1376         type => 'string',
1377         optional => 1,
1378         maxLength => 128,
1379     },
1380     iface => get_standard_option('pve-iface', {
1381         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.",
1382         optional => 1
1383     }),
1384     source => {
1385         description => "Restrict packet source address. $addr_list_descr",
1386         type => 'string', format => 'pve-fw-addr-spec',
1387         optional => 1,
1388     },
1389     dest => {
1390         description => "Restrict packet destination address. $addr_list_descr",
1391         type => 'string', format => 'pve-fw-addr-spec',
1392         optional => 1,
1393     },
1394     proto => {
1395         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1396         type => 'string', format => 'pve-fw-protocol-spec',
1397         optional => 1,
1398     },
1399     enable => {
1400         description => "Flag to enable/disable a rule.",
1401         type => 'integer',
1402         minimum => 0,
1403         optional => 1,
1404     },
1405     log => get_standard_option('pve-fw-loglevel', {
1406         description => "Log level for firewall rule.",
1407     }),
1408     sport => {
1409         description => "Restrict TCP/UDP source port. $port_descr",
1410         type => 'string', format => 'pve-fw-sport-spec',
1411         optional => 1,
1412     },
1413     dport => {
1414         description => "Restrict TCP/UDP destination port. $port_descr",
1415         type => 'string', format => 'pve-fw-dport-spec',
1416         optional => 1,
1417     },
1418     comment => {
1419         description => "Descriptive comment.",
1420         type => 'string',
1421         optional => 1,
1422     },
1423 };
1424
1425 sub add_rule_properties {
1426     my ($properties) = @_;
1427
1428     foreach my $k (keys %$rule_properties) {
1429         my $h = $rule_properties->{$k};
1430         # copy data, so that we can modify later without side effects
1431         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1432     }
1433
1434     return $properties;
1435 }
1436
1437 sub delete_rule_properties {
1438     my ($rule, $delete_str) = @_;
1439
1440     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1441         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1442             if !defined($rule_properties->{$opt});
1443         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1444             if $opt eq 'type' || $opt eq 'action';
1445         delete $rule->{$opt};
1446     }
1447
1448     return $rule;
1449 }
1450
1451 my $apply_macro = sub {
1452     my ($macro_name, $param, $verify, $ipversion) = @_;
1453
1454     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1455     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1456
1457     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1458         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1459     }
1460
1461     # skip macros which are specific to another ipversion
1462     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1463         return if $ipversion != $required;
1464     }
1465
1466     my $rules = [];
1467
1468     foreach my $templ (@$macro_rules) {
1469         my $rule = {};
1470         my $param_used = {};
1471         foreach my $k (keys %$templ) {
1472             my $v = $templ->{$k};
1473             if ($v eq 'PARAM') {
1474                 $v = $param->{$k};
1475                 $param_used->{$k} = 1;
1476             } elsif ($v eq 'DEST') {
1477                 $v = $param->{dest};
1478                 $param_used->{dest} = 1;
1479             } elsif ($v eq 'SOURCE') {
1480                 $v = $param->{source};
1481                 $param_used->{source} = 1;
1482             }
1483
1484             if (!defined($v)) {
1485                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1486                 raise_param_exc({ macro => $msg }) if $verify;
1487                 die "$msg\n";
1488             }
1489             $rule->{$k} = $v;
1490         }
1491         foreach my $k (keys %$param) {
1492             next if $k eq 'macro';
1493             next if !defined($param->{$k});
1494             next if $param_used->{$k};
1495             if (defined($rule->{$k})) {
1496                 if ($rule->{$k} ne $param->{$k}) {
1497                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1498                     raise_param_exc({ $k => $msg }) if $verify;
1499                     die "$msg\n";
1500                 }
1501             } else {
1502                 $rule->{$k} = $param->{$k};
1503             }
1504         }
1505         push @$rules, $rule;
1506     }
1507
1508     return $rules;
1509 };
1510
1511 my $rule_env_iface_lookup = {
1512     'ct' => 1,
1513     'vm' => 1,
1514     'group' => 0,
1515     'cluster' => 1,
1516     'host' => 1,
1517 };
1518
1519 sub verify_rule {
1520     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1521
1522     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1523
1524     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1525     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1526
1527     my $errors = $rule->{errors} || {};
1528
1529     my $error_count = 0;
1530
1531     my $add_error = sub {
1532         my ($param, $msg)  = @_;
1533         chomp $msg;
1534         raise_param_exc({ $param => $msg }) if !$noerr;
1535         $error_count++;
1536         $errors->{$param} = $msg if !$errors->{$param};
1537     };
1538
1539     my $ipversion;
1540     my $set_ip_version = sub {
1541         my $vers = shift;
1542         if ($vers) {
1543             die "detected mixed ipv4/ipv6 adresses in rule\n"
1544                 if $ipversion && ($vers != $ipversion);
1545             $ipversion = $vers;
1546         }
1547     };
1548
1549     my $check_ipset_or_alias_property = sub {
1550         my ($name, $expected_ipversion) = @_;
1551
1552         if (my $value = $rule->{$name}) {
1553             if ($value =~ m/^\+/) {
1554                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1555                     &$add_error($name, "no such ipset '$1'")
1556                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1557
1558                 } else {
1559                     &$add_error($name, "invalid ipset name '$value'");
1560                 }
1561             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1562                 my $alias = lc($value);
1563                 &$add_error($name, "no such alias '$value'")
1564                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1565                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1566                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1567
1568                 &$set_ip_version($e->{ipversion});
1569             }
1570         }
1571     };
1572
1573     my $type = $rule->{type};
1574     my $action = $rule->{action};
1575
1576     &$add_error('type', "missing property") if !$type;
1577     &$add_error('action', "missing property") if !$action;
1578
1579     if ($type) {
1580         if ($type eq  'in' || $type eq 'out') {
1581             &$add_error('action', "unknown action '$action'")
1582                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1583         } elsif ($type eq 'group') {
1584             &$add_error('type', "security groups not allowed")
1585                 if !$allow_groups;
1586             &$add_error('action', "invalid characters in security group name")
1587                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1588         } else {
1589             &$add_error('type', "unknown rule type '$type'");
1590         }
1591     }
1592
1593     if ($rule->{iface}) {
1594         &$add_error('type', "parameter -i not allowed for this rule type")
1595             if !$allow_iface;
1596         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1597         &$add_error('iface', $@) if $@;
1598         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1599             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1600                 if $rule->{iface} !~  m/^net(\d+)$/;
1601         }
1602     }
1603
1604     if ($rule->{macro}) {
1605         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1606             $rule->{macro} = $preferred_name;
1607         } else {
1608             &$add_error('macro', "unknown macro '$rule->{macro}'");
1609         }
1610     }
1611
1612     if ($rule->{proto}) {
1613         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1614         &$add_error('proto', $@) if $@;
1615         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1616         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1617     }
1618
1619     if ($rule->{dport}) {
1620         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1621         &$add_error('dport', $@) if $@;
1622         my $proto = $rule->{proto};
1623         &$add_error('proto', "missing property - 'dport' requires this property")
1624             if !$proto;
1625         &$add_error('dport', "protocol '$proto' does not support ports")
1626             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1627                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1628     }
1629
1630     if ($rule->{sport}) {
1631         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1632         &$add_error('sport', $@) if $@;
1633         my $proto = $rule->{proto};
1634         &$add_error('proto', "missing property - 'sport' requires this property")
1635             if !$proto;
1636         &$add_error('sport', "protocol '$proto' does not support ports")
1637             if !$PROTOCOLS_WITH_PORTS->{$proto};
1638     }
1639
1640     if ($rule->{source}) {
1641         eval {
1642             my $source_ipversion = parse_address_list($rule->{source});
1643             &$set_ip_version($source_ipversion);
1644         };
1645         &$add_error('source', $@) if $@;
1646         &$check_ipset_or_alias_property('source', $ipversion);
1647     }
1648
1649     if ($rule->{dest}) {
1650         eval {
1651             my $dest_ipversion = parse_address_list($rule->{dest});
1652             &$set_ip_version($dest_ipversion);
1653         };
1654         &$add_error('dest', $@) if $@;
1655         &$check_ipset_or_alias_property('dest', $ipversion);
1656     }
1657
1658     $rule->{ipversion} = $ipversion if $ipversion;
1659
1660     if ($rule->{macro} && !$error_count) {
1661         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1662         if (my $err = $@) {
1663             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1664                 my $eh = $err->{errors};
1665                 foreach my $p (keys %$eh) {
1666                     &$add_error($p, $eh->{$p});
1667                 }
1668             } else {
1669                 &$add_error('macro', "$err");
1670             }
1671         }
1672     }
1673
1674     $rule->{errors} = $errors if $error_count;
1675
1676     return $rule;
1677 }
1678
1679 sub copy_rule_data {
1680     my ($rule, $param) = @_;
1681
1682     foreach my $k (keys %$rule_properties) {
1683         if (defined(my $v = $param->{$k})) {
1684             if ($v eq '' || $v eq '-') {
1685                 delete $rule->{$k};
1686             } else {
1687                 $rule->{$k} = $v;
1688             }
1689         }
1690     }
1691
1692     return $rule;
1693 }
1694
1695 sub rules_modify_permissions {
1696     my ($rule_env) = @_;
1697
1698     if ($rule_env eq 'host') {
1699         return {
1700             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1701         };
1702     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1703         return {
1704             check => ['perm', '/', [ 'Sys.Modify' ]],
1705         };
1706     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1707         return {
1708             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1709         }
1710     }
1711
1712     return undef;
1713 }
1714
1715 sub rules_audit_permissions {
1716     my ($rule_env) = @_;
1717
1718     if ($rule_env eq 'host') {
1719         return {
1720             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1721         };
1722     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1723         return {
1724             check => ['perm', '/', [ 'Sys.Audit' ]],
1725         };
1726     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1727         return {
1728             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1729         }
1730     }
1731
1732     return undef;
1733 }
1734
1735 # core functions
1736 my $bridge_firewall_enabled = 0;
1737
1738 sub enable_bridge_firewall {
1739
1740     return if $bridge_firewall_enabled; # only once
1741
1742     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1743     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1744
1745     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1746     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1747
1748     $bridge_firewall_enabled = 1;
1749 }
1750
1751 sub iptables_restore_cmdlist {
1752     my ($cmdlist) = @_;
1753
1754     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1755 }
1756
1757 sub ip6tables_restore_cmdlist {
1758     my ($cmdlist) = @_;
1759
1760     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1761 }
1762
1763 sub ipset_restore_cmdlist {
1764     my ($cmdlist) = @_;
1765
1766     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1767 }
1768
1769 sub ebtables_restore_cmdlist {
1770     my ($cmdlist) = @_;
1771
1772     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1773 }
1774
1775 sub iptables_get_chains {
1776     my ($iptablescmd) = @_;
1777
1778     $iptablescmd = "iptables" if !$iptablescmd;
1779
1780     my $res = {};
1781
1782     # check what chains we want to track
1783     my $is_pvefw_chain = sub {
1784         my $name = shift;
1785
1786         return 1 if $name =~ m/^PVEFW-\S+$/;
1787
1788         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1789
1790         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1791
1792         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1793         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1794
1795         return undef;
1796     };
1797
1798     my $table = '';
1799
1800     my $hooks = {};
1801
1802     my $parser = sub {
1803         my $line = shift;
1804
1805         return if $line =~ m/^#/;
1806         return if $line =~ m/^\s*$/;
1807
1808         if ($line =~ m/^\*(\S+)$/) {
1809             $table = $1;
1810             return;
1811         }
1812
1813         return if $table ne 'filter';
1814
1815         if ($line =~ m/^:(\S+)\s/) {
1816             my $chain = $1;
1817             return if !&$is_pvefw_chain($chain);
1818             $res->{$chain} = "unknown";
1819         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1820             my ($chain, $sig) = ($1, $2);
1821             return if !&$is_pvefw_chain($chain);
1822             $res->{$chain} = $sig;
1823         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1824             $hooks->{$1} = 1;
1825         } else {
1826             # simply ignore the rest
1827             return;
1828         }
1829     };
1830
1831     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1832
1833     return wantarray ? ($res, $hooks) : $res;
1834 }
1835
1836 sub iptables_chain_digest {
1837     my ($rules) = @_;
1838     my $digest = Digest::SHA->new('sha1');
1839     foreach my $rule (@$rules) { # order is important
1840         $digest->add($rule);
1841     }
1842     return $digest->b64digest;
1843 }
1844
1845 sub ipset_chain_digest {
1846     my ($rules) = @_;
1847
1848     my $digest = Digest::SHA->new('sha1');
1849     foreach my $rule (sort @$rules) { # note: sorted
1850         $digest->add($rule);
1851     }
1852     return $digest->b64digest;
1853 }
1854
1855 sub ipset_get_chains {
1856
1857     my $res = {};
1858     my $chains = {};
1859
1860     my $parser = sub {
1861         my $line = shift;
1862
1863         return if $line =~ m/^#/;
1864         return if $line =~ m/^\s*$/;
1865         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1866             my $chain = $1;
1867             $line =~ s/\s+$//; # delete trailing white space
1868             push @{$chains->{$chain}}, $line;
1869         } else {
1870             # simply ignore the rest
1871             return;
1872         }
1873     };
1874
1875     run_command("/sbin/ipset save", outfunc => $parser);
1876
1877     # compute digest for each chain
1878     foreach my $chain (keys %$chains) {
1879         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1880     }
1881
1882     return $res;
1883 }
1884
1885 sub ebtables_get_chains {
1886
1887     my $res = {};
1888     my $chains = {};
1889     my $parser = sub {
1890         my $line = shift;
1891         return if $line =~ m/^#/;
1892         return if $line =~ m/^\s*$/;
1893         if ($line =~ m/^:(\S+)\s\S+$/) {
1894             # Make sure we know chains exist even if they're empty.
1895             $chains->{$1} //= [];
1896         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1897             my $chain = $1;
1898             $line =~ s/\s+$//;
1899             push @{$chains->{$chain}}, $line;
1900         } else {
1901             # simply ignore the rest
1902             return;
1903         }
1904     };
1905
1906     run_command("/sbin/ebtables-save", outfunc => $parser);
1907     # compute digest for each chain and store rules as well
1908     foreach my $chain (keys %$chains) {
1909         $res->{$chain}->{rules} = $chains->{$chain};
1910         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1911     }
1912     return $res;
1913 }
1914
1915 # substitude action of rule according to action hash
1916 sub rule_substitude_action {
1917     my ($rule, $actions) = @_;
1918
1919     if (my $action = $rule->{action}) {
1920         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1921     }
1922 }
1923
1924 # generate a src or dst match
1925 # $dir(ection) is either d or s
1926 sub ipt_gen_src_or_dst_match {
1927     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1928
1929     my $srcdst;
1930     if ($dir eq 's') {
1931         $srcdst = "src";
1932     } elsif ($dir eq 'd') {
1933         $srcdst = "dst";
1934     } else {
1935         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1936     }
1937
1938     my $match;
1939     if ($adr =~ m/^\+/) {
1940         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1941             my $name = $1;
1942             my $ipset_chain;
1943             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1944                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1945             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1946                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1947             } else {
1948                 die "no such ipset '$name'\n";
1949             }
1950             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1951         } else {
1952             die "invalid security group name '$adr'\n";
1953         }
1954     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1955         my $alias = lc($adr);
1956         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1957         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1958         die "no such alias '$adr'\n" if !$e;
1959         $match = "-${dir} $e->{cidr}";
1960     } elsif ($adr =~ m/\-/){
1961         $match = "-m iprange --${srcdst}-range $adr";
1962     } else {
1963         $match = "-${dir} $adr";
1964     }
1965
1966     return $match;
1967 }
1968
1969 # convert a %rule to an array of iptables commands
1970 sub ipt_rule_to_cmds {
1971     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1972
1973     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1974
1975     my @match = ();
1976
1977     if (defined $rule->{match}) {
1978         push @match, $rule->{match};
1979     } else {
1980         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1981         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1982
1983         if ($rule->{source}) {
1984             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1985         }
1986         if ($rule->{dest}) {
1987             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1988         }
1989
1990         if (my $proto = $rule->{proto}) {
1991             push @match, "-p $proto";
1992
1993             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1994             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1995
1996             my $add_dport = sub {
1997                 return if !$rule->{dport};
1998
1999                 if ($proto eq 'icmp') {
2000                     # Note: we use dport to store --icmp-type
2001                     die "unknown icmp-type '$rule->{dport}'\n"
2002                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2003                     push @match, "-m icmp --icmp-type $rule->{dport}";
2004                 } elsif ($proto eq 'icmpv6') {
2005                     # Note: we use dport to store --icmpv6-type
2006                     die "unknown icmpv6-type '$rule->{dport}'\n"
2007                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2008                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2009                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2010                     die "protocol $proto does not have ports\n";
2011                 } elsif ($multidport) {
2012                     push @match, "--match multiport", "--dports $rule->{dport}";
2013                 } else {
2014                     push @match, "--dport $rule->{dport}";
2015                 }
2016             };
2017
2018             my $add_sport = sub {
2019                 return if !$rule->{sport};
2020
2021                 die "protocol $proto does not have ports\n"
2022                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2023                 if ($multisport) {
2024                     push @match, "--match multiport", "--sports $rule->{sport}";
2025                 } else {
2026                     push @match, "--sport $rule->{sport}";
2027                 }
2028             };
2029
2030             # order matters - single port before multiport!
2031             $add_dport->() if $multisport;
2032             $add_sport->();
2033             $add_dport->() if !$multisport;
2034         } elsif ($rule->{dport} || $rule->{sport}) {
2035             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2036             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2037         }
2038
2039         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2040     }
2041     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2042
2043     my $targetstr;
2044     if (defined $rule->{target}) {
2045         $targetstr = $rule->{target};
2046     } else {
2047         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2048         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2049         $targetstr = ($goto) ? "-g $action" : "-j $action";
2050     }
2051
2052     my @iptcmds;
2053     my $log = $rule->{log};
2054     if (defined($log) && $log ne 'nolog') {
2055         my $loglevel = $log_level_hash->{$log};
2056         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2057         push @iptcmds, "-A $chain $matchstr $logaction";
2058     }
2059     push @iptcmds, "-A $chain $matchstr $targetstr";
2060     return @iptcmds;
2061 }
2062
2063 sub ruleset_generate_rule {
2064     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2065
2066     my $rules;
2067
2068     if ($rule->{macro}) {
2069         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2070     } else {
2071         $rules = [ $rule ];
2072     }
2073
2074     # update all or nothing
2075     my @ipt_rule_cmds;
2076     foreach my $r (@$rules) {
2077         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2078     }
2079     foreach my $c (@ipt_rule_cmds) {
2080         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2081     }
2082 }
2083
2084 sub ruleset_create_chain {
2085     my ($ruleset, $chain) = @_;
2086
2087     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2088     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2089
2090     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2091
2092     $ruleset->{$chain} = [];
2093 }
2094
2095 sub ruleset_chain_exist {
2096     my ($ruleset, $chain) = @_;
2097
2098     return $ruleset->{$chain} ? 1 : undef;
2099 }
2100
2101 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2102 sub ruleset_add_ipt_cmd {
2103    my ($ruleset, $chain, $iptcmd) = @_;
2104
2105    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2106
2107    push @{$ruleset->{$chain}}, $iptcmd;
2108 }
2109
2110 sub ruleset_addrule {
2111     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2112
2113     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2114
2115     if ($log) {
2116         my $loglevel = $log_level_hash->{$log};
2117         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2118         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2119     }
2120     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2121     $match .= ' ' if length($match);
2122     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2123 }
2124
2125 sub ruleset_insertrule {
2126    my ($ruleset, $chain, $match, $action, $log) = @_;
2127
2128    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2129
2130    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2131 }
2132
2133 sub get_log_rule_base {
2134     my ($chain, $vmid, $msg, $loglevel) = @_;
2135
2136     $vmid = 0 if !defined($vmid);
2137     $msg = "" if !defined($msg);
2138
2139     my $rlimit = '';
2140     if (defined($global_log_ratelimit)) {
2141         $rlimit = "-m limit $global_log_ratelimit ";
2142     }
2143
2144     # Note: we use special format for prefix to pass further
2145     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2146     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2147 }
2148
2149 sub ruleset_add_chain_policy {
2150     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2151
2152     if ($policy eq 'ACCEPT') {
2153
2154         my $rule = { action => 'ACCEPT' };
2155         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2156         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2157
2158     } elsif ($policy eq 'DROP') {
2159
2160         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2161
2162         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2163     } elsif ($policy eq 'REJECT') {
2164         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2165
2166         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2167     } else {
2168         # should not happen
2169         die "internal error: unknown policy '$policy'";
2170     }
2171 }
2172
2173 sub ruleset_chain_add_ndp {
2174     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2175     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2176
2177     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2178     if ($direction ne 'OUT' || $options->{radv}) {
2179         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2180     }
2181     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2182     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2183 }
2184
2185 sub ruleset_chain_add_conn_filters {
2186     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2187
2188     if (!$allow_invalid) {
2189         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2190     }
2191     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2192 }
2193
2194 sub ruleset_chain_add_input_filters {
2195     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2196
2197     if ($cluster_conf->{ipset}->{blacklist}){
2198         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2199             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2200             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2201         }
2202         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2203         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2204     }
2205
2206     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2207         if ($ipversion == 4) {
2208             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2209         }
2210     }
2211
2212     if ($options->{tcpflags}) {
2213         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2214     }
2215 }
2216
2217 sub ruleset_create_vm_chain {
2218     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2219
2220     ruleset_create_chain($ruleset, $chain);
2221     my $accept = generate_nfqueue($options);
2222
2223     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2224         if ($ipversion == 4) {
2225             if ($direction eq 'OUT') {
2226                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2227                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2228                                         proto => 'udp', sport => 68, dport => 67 });
2229             } else {
2230                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2231                                       { action => 'ACCEPT',
2232                                         proto => 'udp', sport => 67, dport => 68 });
2233             }
2234         } elsif ($ipversion == 6) {
2235             if ($direction eq 'OUT') {
2236                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2237                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2238                                         proto => 'udp', sport => 546, dport => 547 });
2239             } else {
2240                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2241                                       { action => 'ACCEPT',
2242                                         proto => 'udp', sport => 547, dport => 546 });
2243             }
2244         }
2245
2246     }
2247
2248     if ($direction eq 'OUT') {
2249         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2250             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2251         }
2252         if ($ipversion == 6 && !$options->{radv}) {
2253             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2254         }
2255         if ($ipfilter_ipset) {
2256             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2257         }
2258         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2259     }
2260
2261     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2262     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2263 }
2264
2265 sub ruleset_add_group_rule {
2266     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2267
2268     my $group = $rule->{action};
2269     my $group_chain = "GROUP-$group-$direction";
2270     if(!ruleset_chain_exist($ruleset, $group_chain)){
2271         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2272     }
2273
2274     if ($direction eq 'OUT' && $rule->{iface_out}) {
2275         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2276     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2277         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2278     } else {
2279         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2280     }
2281
2282     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2283 }
2284
2285 sub ruleset_generate_vm_rules {
2286     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2287
2288     my $lc_direction = lc($direction);
2289
2290     my $in_accept = generate_nfqueue($options);
2291
2292     foreach my $rule (@$rules) {
2293         next if $rule->{iface} && $rule->{iface} ne $netid;
2294         next if !$rule->{enable} || $rule->{errors};
2295         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2296
2297         if ($rule->{type} eq 'group') {
2298             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2299                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2300         } else {
2301             next if $rule->{type} ne $lc_direction;
2302             eval {
2303                 $rule->{logmsg} = "$rule->{action}: ";
2304                 if ($direction eq 'OUT') {
2305                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2306                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2307                 } else {
2308                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2309                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2310                 }
2311             };
2312             warn $@ if $@;
2313         }
2314     }
2315 }
2316
2317 sub generate_nfqueue {
2318     my ($options) = @_;
2319
2320     if ($options->{ips}) {
2321         my $action = "NFQUEUE";
2322         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2323             if (defined($3) && defined($1)) {
2324                 $action .= " --queue-balance $1:$3";
2325             } elsif (defined($1)) {
2326                 $action .= " --queue-num $1";
2327             }
2328         }
2329         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2330         return $action;
2331     } else {
2332         return "ACCEPT";
2333     }
2334 }
2335
2336 sub ruleset_generate_vm_ipsrules {
2337     my ($ruleset, $options, $direction, $iface) = @_;
2338
2339     if ($options->{ips} && $direction eq 'IN') {
2340         my $nfqueue = generate_nfqueue($options);
2341
2342         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2343             ruleset_create_chain($ruleset, "PVEFW-IPS");
2344         }
2345
2346         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2347     }
2348 }
2349
2350 sub generate_tap_rules_direction {
2351     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2352
2353     my $lc_direction = lc($direction);
2354
2355     my $rules = $vmfw_conf->{rules};
2356
2357     my $options = $vmfw_conf->{options};
2358     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2359
2360     my $tapchain = "$iface-$direction";
2361
2362     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2363     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2364         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2365
2366     # create chain with mac and ip filter
2367     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2368
2369     if ($options->{enable}) {
2370         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2371
2372         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2373
2374         # implement policy
2375         my $policy;
2376
2377         if ($direction eq 'OUT') {
2378             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2379         } else {
2380             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2381         }
2382
2383         my $accept = generate_nfqueue($options);
2384         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2385         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2386     } else {
2387         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2388         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2389     }
2390
2391     # plug the tap chain to bridge chain
2392     if ($direction eq 'IN') {
2393         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2394                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
2395     } else {
2396         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2397                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
2398     }
2399 }
2400
2401 sub enable_host_firewall {
2402     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2403
2404     my $options = $hostfw_conf->{options};
2405     my $cluster_options = $cluster_conf->{options};
2406     my $rules = $hostfw_conf->{rules};
2407     my $cluster_rules = $cluster_conf->{rules};
2408
2409     # host inbound firewall
2410     my $chain = "PVEFW-HOST-IN";
2411     ruleset_create_chain($ruleset, $chain);
2412
2413     my $loglevel = get_option_log_level($options, "log_level_in");
2414
2415     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2416
2417     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2418     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2419     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2420
2421     # we use RETURN because we need to check also tap rules
2422     my $accept_action = 'RETURN';
2423
2424     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2425
2426     # add host rules first, so that cluster wide rules can be overwritten
2427     foreach my $rule (@$rules, @$cluster_rules) {
2428         next if !$rule->{enable} || $rule->{errors};
2429         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2430
2431         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2432
2433         eval {
2434             if ($rule->{type} eq 'group') {
2435                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2436             } elsif ($rule->{type} eq 'in') {
2437                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2438                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2439             }
2440         };
2441         warn $@ if $@;
2442         delete $rule->{iface_in};
2443     }
2444
2445     # allow standard traffic for management ipset (includes cluster network)
2446     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2447     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2448     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2449     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2450     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2451     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2452
2453     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2454     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2455
2456     # corosync
2457     if ($localnet && ($ipversion == $localnet_ver)) {
2458         my $corosync_rule = "-p udp --dport 5404:5405";
2459         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2460         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2461     }
2462
2463     # implement input policy
2464     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2465     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2466
2467     # host outbound firewall
2468     $chain = "PVEFW-HOST-OUT";
2469     ruleset_create_chain($ruleset, $chain);
2470
2471     $loglevel = get_option_log_level($options, "log_level_out");
2472
2473     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2474
2475     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2476
2477     # we use RETURN because we may want to check other thigs later
2478     $accept_action = 'RETURN';
2479     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2480
2481     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2482
2483     # add host rules first, so that cluster wide rules can be overwritten
2484     foreach my $rule (@$rules, @$cluster_rules) {
2485         next if !$rule->{enable} || $rule->{errors};
2486         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2487
2488         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2489         eval {
2490             $rule->{logmsg} = "$rule->{action}: ";
2491             if ($rule->{type} eq 'group') {
2492                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2493             } elsif ($rule->{type} eq 'out') {
2494                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2495                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2496             }
2497         };
2498         warn $@ if $@;
2499         delete $rule->{iface_out};
2500     }
2501
2502     # allow standard traffic on cluster network
2503     if ($localnet && ($ipversion == $localnet_ver)) {
2504         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2505         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2506         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2507         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2508
2509         my $corosync_rule = "-p udp --dport 5404:5405";
2510         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2511         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2512     }
2513
2514     # implement output policy
2515     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2516     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2517
2518     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2519     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2520 }
2521
2522 sub generate_group_rules {
2523     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2524
2525     my $rules = $cluster_conf->{groups}->{$group};
2526
2527     if (!$rules) {
2528         warn "no such security group '$group'\n";
2529         $rules = []; # create empty chain
2530     }
2531
2532     my $chain = "GROUP-${group}-IN";
2533
2534     ruleset_create_chain($ruleset, $chain);
2535     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2536
2537     foreach my $rule (@$rules) {
2538         next if $rule->{type} ne 'in';
2539         next if !$rule->{enable} || $rule->{errors};
2540         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2541         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2542         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2543     }
2544
2545     $chain = "GROUP-${group}-OUT";
2546
2547     ruleset_create_chain($ruleset, $chain);
2548     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2549
2550     foreach my $rule (@$rules) {
2551         next if $rule->{type} ne 'out';
2552         next if !$rule->{enable} || $rule->{errors};
2553         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2554         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2555         # check also other tap rules later
2556         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2557         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2558     }
2559 }
2560
2561 my $MAX_NETS = 32;
2562 my $valid_netdev_names = {};
2563 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2564     $valid_netdev_names->{"net$i"} = 1;
2565 }
2566
2567 sub get_mark_values {
2568     my ($value, $mask) = @_;
2569     $value = hex($value) if $value =~ /^0x/;
2570     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2571     $mask = 0xffffffff if !defined($mask);
2572     return ($value, $mask);
2573 }
2574
2575 sub parse_fw_rule {
2576     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2577
2578     my $orig_line = $line;
2579
2580     my $rule = {};
2581
2582     # we can add single line comments to the end of the rule
2583     if ($line =~ s/#\s*(.*?)\s*$//) {
2584         $rule->{comment} = decode('utf8', $1);
2585     }
2586
2587     # we can disable a rule when prefixed with '|'
2588
2589     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2590
2591     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2592         die "unable to parse rule: $line\n";
2593
2594     $rule->{type} = lc($1);
2595     $rule->{action} = $2;
2596
2597     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2598         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2599             $rule->{macro} = $1;
2600             $rule->{action} = $2;
2601         }
2602     }
2603
2604     while (length($line)) {
2605         if ($line =~ s/^-i (\S+)\s*//) {
2606             $rule->{iface} = $1;
2607             next;
2608         }
2609
2610         last if $rule->{type} eq 'group';
2611
2612         if ($line =~ s/^-p (\S+)\s*//) {
2613             $rule->{proto} = $1;
2614             next;
2615         }
2616
2617         if ($line =~ s/^-dport (\S+)\s*//) {
2618             $rule->{dport} = $1;
2619             next;
2620         }
2621
2622         if ($line =~ s/^-sport (\S+)\s*//) {
2623             $rule->{sport} = $1;
2624             next;
2625         }
2626         if ($line =~ s/^-source (\S+)\s*//) {
2627             $rule->{source} = $1;
2628             next;
2629         }
2630         if ($line =~ s/^-dest (\S+)\s*//) {
2631             $rule->{dest} = $1;
2632             next;
2633         }
2634         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2635             $rule->{log} = $1;
2636             next;
2637         }
2638
2639         last;
2640     }
2641
2642     die "unable to parse rule parameters: $line\n" if length($line);
2643
2644     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2645     if ($rule->{errors}) {
2646         # The verbose flag really means we're running from the CLI and want
2647         # output on the console - in the other case we really want such errors
2648         # to go into the syslog instead.
2649         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2650         $log->("$prefix - errors in rule parameters: $orig_line\n");
2651         foreach my $p (keys %{$rule->{errors}}) {
2652             $log->("  $p: $rule->{errors}->{$p}\n");
2653         }
2654     }
2655
2656     return $rule;
2657 }
2658
2659 sub verify_ethertype {
2660     my ($value) = @_;
2661     my $types = get_etc_ethertypes();
2662     die "unknown ethernet protocol type: $value\n"
2663         if !defined($types->{byname}->{$value}) &&
2664            !defined($types->{byid}->{$value});
2665 }
2666
2667 sub parse_vmfw_option {
2668     my ($line) = @_;
2669
2670     my ($opt, $value);
2671
2672     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2673
2674     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2675         $opt = lc($1);
2676         $value = int($2);
2677     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2678         $opt = lc($1);
2679         $value = $2 ? lc($3) : '';
2680     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2681         $opt = lc($1);
2682         $value = uc($3);
2683     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2684         $opt = lc($1);
2685         $value = $2;
2686     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2687         $opt = lc($1);
2688         $value = $2;
2689         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2690     } else {
2691         die "can't parse option '$line'\n"
2692     }
2693
2694     return ($opt, $value);
2695 }
2696
2697 sub parse_hostfw_option {
2698     my ($line) = @_;
2699
2700     my ($opt, $value);
2701
2702     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2703
2704     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2705         $opt = lc($1);
2706         $value = int($2);
2707     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2708         $opt = lc($1);
2709         $value = $2 ? lc($3) : '';
2710     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2711         $opt = lc($1);
2712         $value = int($2);
2713     } else {
2714         die "can't parse option '$line'\n"
2715     }
2716
2717     return ($opt, $value);
2718 }
2719
2720 sub parse_clusterfw_option {
2721     my ($line) = @_;
2722
2723     my ($opt, $value);
2724
2725     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2726         $opt = lc($1);
2727         $value = int($2);
2728         if (($value > 1) && ((time() - $value) > 60)) {
2729             $value = 0
2730         }
2731     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2732         $opt = lc($1);
2733         $value = int($2);
2734     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2735         $opt = lc($1);
2736         $value = uc($3);
2737     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2738         $opt = lc($1);
2739         $value = $2;
2740     } else {
2741         die "can't parse option '$line'\n"
2742     }
2743
2744     return ($opt, $value);
2745 }
2746
2747 sub resolve_alias {
2748     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2749
2750     my $alias = lc($cidr);
2751     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2752     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2753
2754     die "no such alias '$cidr'\n" if !$e;;
2755
2756     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2757 }
2758
2759 sub parse_ip_or_cidr {
2760     my ($cidr) = @_;
2761
2762     my $ipversion;
2763
2764     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2765         $cidr =~ s|/128$||;
2766         $ipversion = 6;
2767     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2768         $cidr =~ s|/32$||;
2769         $ipversion = 4;
2770     } else {
2771         die "value does not look like a valid IP address or CIDR network\n";
2772     }
2773
2774     return wantarray ? ($cidr, $ipversion) : $cidr;
2775 }
2776
2777 sub parse_alias {
2778     my ($line) = @_;
2779
2780     # we can add single line comments to the end of the line
2781     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2782
2783     if ($line =~ m/^(\S+)\s(\S+)$/) {
2784         my ($name, $cidr) = ($1, $2);
2785         my $ipversion;
2786
2787         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2788
2789         my $data = {
2790             name => $name,
2791             cidr => $cidr,
2792             ipversion => $ipversion,
2793         };
2794         $data->{comment} = $comment  if $comment;
2795         return $data;
2796     }
2797
2798     return undef;
2799 }
2800
2801 sub generic_fw_config_parser {
2802     my ($filename, $fh, $cluster_conf, $empty_conf, $rule_env) = @_;
2803
2804     my $section;
2805     my $group;
2806
2807     my $res = $empty_conf;
2808
2809     while (defined(my $line = <$fh>)) {
2810         next if $line =~ m/^#/;
2811         next if $line =~ m/^\s*$/;
2812
2813         chomp $line;
2814
2815         my $linenr = $fh->input_line_number();
2816         my $prefix = "$filename (line $linenr)";
2817
2818         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2819             $section = 'options';
2820             next;
2821         }
2822
2823         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2824             $section = 'aliases';
2825             next;
2826         }
2827
2828         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2829             $section = 'groups';
2830             $group = lc($1);
2831             my $comment = $2;
2832             eval {
2833                 die "security group name too long\n" if length($group) > $max_group_name_length;
2834                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2835             };
2836             if (my $err = $@) {
2837                 ($section, $group, $comment) = undef;
2838                 warn "$prefix: $err";
2839                 next;
2840             }
2841
2842             $res->{$section}->{$group} = [];
2843             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2844                 if $comment;
2845             next;
2846         }
2847
2848         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2849             $section = 'rules';
2850             next;
2851         }
2852
2853         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2854             $section = 'ipset';
2855             $group = lc($1);
2856             my $comment = $2;
2857             eval {
2858                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2859                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2860             };
2861             if (my $err = $@) {
2862                 ($section, $group, $comment) = undef;
2863                 warn "$prefix: $err";
2864                 next;
2865             }
2866
2867             $res->{$section}->{$group} = [];
2868             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2869                 if $comment;
2870             next;
2871         }
2872
2873         if (!$section) {
2874             warn "$prefix: skip line - no section\n";
2875             next;
2876         }
2877
2878         if ($section eq 'options') {
2879             eval {
2880                 my ($opt, $value);
2881                 if ($rule_env eq 'cluster') {
2882                     ($opt, $value) = parse_clusterfw_option($line);
2883                 } elsif ($rule_env eq 'host') {
2884                     ($opt, $value) = parse_hostfw_option($line);
2885                 } else {
2886                     ($opt, $value) = parse_vmfw_option($line);
2887                 }
2888                 $res->{options}->{$opt} = $value;
2889             };
2890             warn "$prefix: $@" if $@;
2891         } elsif ($section eq 'aliases') {
2892             eval {
2893                 my $data = parse_alias($line);
2894                 $res->{aliases}->{lc($data->{name})} = $data;
2895             };
2896             warn "$prefix: $@" if $@;
2897         } elsif ($section eq 'rules') {
2898             my $rule;
2899             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2900             if (my $err = $@) {
2901                 warn "$prefix: $err";
2902                 next;
2903             }
2904             push @{$res->{$section}}, $rule;
2905         } elsif ($section eq 'groups') {
2906             my $rule;
2907             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2908             if (my $err = $@) {
2909                 warn "$prefix: $err";
2910                 next;
2911             }
2912             push @{$res->{$section}->{$group}}, $rule;
2913         } elsif ($section eq 'ipset') {
2914             # we can add single line comments to the end of the rule
2915             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2916
2917             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2918             my $nomatch = $1;
2919             my $cidr = $2;
2920             my $errors;
2921
2922             if ($nomatch && !$feature_ipset_nomatch) {
2923                 $errors->{nomatch} = "nomatch not supported by kernel";
2924             }
2925
2926             eval {
2927                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2928                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2929                 } else {
2930                     $cidr = parse_ip_or_cidr($cidr);
2931                 }
2932             };
2933             if (my $err = $@) {
2934                 chomp $err;
2935                 $errors->{cidr} = $err;
2936             }
2937
2938             if ($cidr =~ m!/0+$!) {
2939                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2940             }
2941
2942             my $entry = { cidr => $cidr };
2943             $entry->{nomatch} = 1 if $nomatch;
2944             $entry->{comment} = $comment if $comment;
2945             $entry->{errors} =  $errors if $errors;
2946
2947             if ($verbose && $errors) {
2948                 warn "$prefix - errors in ipset '$group': $line\n";
2949                 foreach my $p (keys %{$errors}) {
2950                     warn "  $p: $errors->{$p}\n";
2951                 }
2952             }
2953
2954             push @{$res->{$section}->{$group}}, $entry;
2955         } else {
2956             warn "$prefix: skip line - unknown section\n";
2957             next;
2958         }
2959     }
2960
2961     return $res;
2962 }
2963
2964 sub parse_hostfw_config {
2965     my ($filename, $fh, $cluster_conf) = @_;
2966
2967     my $empty_conf = { rules => [], options => {}};
2968
2969     return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, 'host');
2970 }
2971
2972 sub parse_vmfw_config {
2973     my ($filename, $fh, $cluster_conf, $rule_env) = @_;
2974
2975     my $empty_conf = {
2976         rules => [],
2977         options => {},
2978         aliases => {},
2979         ipset => {} ,
2980         ipset_comments => {},
2981     };
2982
2983     return generic_fw_config_parser($filename, $fh, $cluster_conf, $empty_conf, $rule_env);
2984 }
2985
2986 sub parse_clusterfw_config {
2987     my ($filename, $fh) = @_;
2988
2989     my $section;
2990     my $group;
2991
2992     my $empty_conf = {
2993         rules => [],
2994         options => {},
2995         aliases => {},
2996         groups => {},
2997         group_comments => {},
2998         ipset => {} ,
2999         ipset_comments => {},
3000     };
3001
3002     return generic_fw_config_parser($filename, $fh, $empty_conf, $empty_conf, 'cluster');
3003 }
3004
3005 sub run_locked {
3006     my ($code, @param) = @_;
3007
3008     my $timeout = 10;
3009
3010     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3011
3012     die $@ if $@;
3013
3014     return $res;
3015 }
3016
3017 sub read_local_vm_config {
3018
3019     my $qemu = {};
3020     my $lxc = {};
3021
3022     my $vmdata = { qemu => $qemu, lxc => $lxc };
3023
3024     my $vmlist = PVE::Cluster::get_vmlist();
3025     return $vmdata if !$vmlist || !$vmlist->{ids};
3026     my $ids = $vmlist->{ids};
3027
3028     foreach my $vmid (keys %$ids) {
3029         next if !$vmid; # skip VE0
3030         my $d = $ids->{$vmid};
3031         next if !$d->{node} || $d->{node} ne $nodename;
3032         next if !$d->{type};
3033         if ($d->{type} eq 'qemu') {
3034             if ($have_qemu_server) {
3035                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3036                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3037                     $qemu->{$vmid} = $conf;
3038                 }
3039             }
3040         } elsif ($d->{type} eq 'lxc') {
3041             if ($have_lxc) {
3042                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3043                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3044                     $lxc->{$vmid} = $conf;
3045                 }
3046             }
3047         }
3048     }
3049
3050     return $vmdata;
3051 };
3052
3053 sub load_vmfw_conf {
3054     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3055
3056     my $vmfw_conf = {};
3057
3058     $dir = $pvefw_conf_dir if !defined($dir);
3059
3060     my $filename = "$dir/$vmid.fw";
3061     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3062         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env);
3063         $vmfw_conf->{vmid} = $vmid;
3064     }
3065
3066     return $vmfw_conf;
3067 }
3068
3069 my $format_rules = sub {
3070     my ($rules, $allow_iface) = @_;
3071
3072     my $raw = '';
3073
3074     foreach my $rule (@$rules) {
3075         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3076             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3077             $raw .= uc($rule->{type});
3078             if ($rule->{macro}) {
3079                 $raw .= " $rule->{macro}($rule->{action})";
3080             } else {
3081                 $raw .= " " . $rule->{action};
3082             }
3083             if ($allow_iface && $rule->{iface}) {
3084                 $raw .= " -i $rule->{iface}";
3085             }
3086
3087             if ($rule->{type} ne  'group')  {
3088                 $raw .= " -source $rule->{source}" if $rule->{source};
3089                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3090                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3091                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3092                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3093                 $raw .= " -log $rule->{log}" if $rule->{log};
3094             }
3095
3096             $raw .= " # " . encode('utf8', $rule->{comment})
3097                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3098             $raw .= "\n";
3099         } else {
3100             die "unknown rule type '$rule->{type}'";
3101         }
3102     }
3103
3104     return $raw;
3105 };
3106
3107 my $format_options = sub {
3108     my ($options) = @_;
3109
3110     my $raw = '';
3111
3112     $raw .= "[OPTIONS]\n\n";
3113     foreach my $opt (keys %$options) {
3114         $raw .= "$opt: $options->{$opt}\n";
3115     }
3116     $raw .= "\n";
3117
3118     return $raw;
3119 };
3120
3121 my $format_aliases = sub {
3122     my ($aliases) = @_;
3123
3124     my $raw = '';
3125
3126     $raw .= "[ALIASES]\n\n";
3127     foreach my $k (keys %$aliases) {
3128         my $e = $aliases->{$k};
3129         $raw .= "$e->{name} $e->{cidr}";
3130         $raw .= " # " . encode('utf8', $e->{comment})
3131             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3132         $raw .= "\n";
3133     }
3134     $raw .= "\n";
3135
3136     return $raw;
3137 };
3138
3139 my $format_ipsets = sub {
3140     my ($fw_conf) = @_;
3141
3142     my $raw = '';
3143
3144     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3145         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3146             my $utf8comment = encode('utf8', $comment);
3147             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3148         } else {
3149             $raw .= "[IPSET $ipset]\n\n";
3150         }
3151         my $options = $fw_conf->{ipset}->{$ipset};
3152
3153         my $nethash = {};
3154         foreach my $entry (@$options) {
3155             $nethash->{$entry->{cidr}} = $entry;
3156         }
3157
3158         foreach my $cidr (sort keys %$nethash) {
3159             my $entry = $nethash->{$cidr};
3160             my $line = $entry->{nomatch} ? '!' : '';
3161             $line .= $entry->{cidr};
3162             $line .= " # " . encode('utf8', $entry->{comment})
3163                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3164             $raw .= "$line\n";
3165         }
3166
3167         $raw .= "\n";
3168     }
3169
3170     return $raw;
3171 };
3172
3173 sub save_vmfw_conf {
3174     my ($vmid, $vmfw_conf) = @_;
3175
3176     my $raw = '';
3177
3178     my $options = $vmfw_conf->{options};
3179     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3180
3181     my $aliases = $vmfw_conf->{aliases};
3182     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3183
3184     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3185
3186     my $rules = $vmfw_conf->{rules} || [];
3187     if ($rules && scalar(@$rules)) {
3188         $raw .= "[RULES]\n\n";
3189         $raw .= &$format_rules($rules, 1);
3190         $raw .= "\n";
3191     }
3192
3193     my $filename = "$pvefw_conf_dir/$vmid.fw";
3194     if ($raw) {
3195         mkdir $pvefw_conf_dir;
3196         PVE::Tools::file_set_contents($filename, $raw);
3197     } else {
3198         unlink $filename;
3199     }
3200 }
3201
3202 sub remove_vmfw_conf {
3203     my ($vmid) = @_;
3204
3205     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3206
3207     unlink $vmfw_conffile;
3208 }
3209
3210 sub clone_vmfw_conf {
3211     my ($vmid, $newid) = @_;
3212
3213     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3214     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3215
3216     if (-f $clonevm_conffile) {
3217         unlink $clonevm_conffile;
3218     }
3219     if (-f $sourcevm_conffile) {
3220         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3221         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3222     }
3223 }
3224
3225 sub read_vm_firewall_configs {
3226     my ($cluster_conf, $vmdata, $dir) = @_;
3227
3228     my $vmfw_configs = {};
3229
3230     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3231         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3232         next if !$vmfw_conf->{options}; # skip if file does not exists
3233         $vmfw_configs->{$vmid} = $vmfw_conf;
3234     }
3235     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3236         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3237         next if !$vmfw_conf->{options}; # skip if file does not exists
3238         $vmfw_configs->{$vmid} = $vmfw_conf;
3239     }
3240
3241     return $vmfw_configs;
3242 }
3243
3244 sub get_option_log_level {
3245     my ($options, $k) = @_;
3246
3247     my $v = $options->{$k};
3248     $v = $default_log_level if !defined($v);
3249
3250     return undef if $v eq '' || $v eq 'nolog';
3251
3252     return $v if defined($log_level_hash->{$v});
3253
3254     warn "unknown log level ($k = '$v')\n";
3255
3256     return undef;
3257 }
3258
3259 sub generate_std_chains {
3260     my ($ruleset, $options, $ipversion) = @_;
3261
3262     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3263
3264     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3265     my $chain = 'PVEFW-smurflog';
3266     if ( $std_chains->{$chain} ) {
3267         foreach my $r (@{$std_chains->{$chain}}) {
3268           $r->{log} = $loglevel;
3269         }
3270     }
3271
3272     # same as shorewall logflags action.
3273     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3274     $chain = 'PVEFW-logflags';
3275     if ( $std_chains->{$chain} ) {
3276         foreach my $r (@{$std_chains->{$chain}}) {
3277           $r->{log} = $loglevel;
3278         }
3279     }
3280
3281     foreach my $chain (keys %$std_chains) {
3282         ruleset_create_chain($ruleset, $chain);
3283         foreach my $rule (@{$std_chains->{$chain}}) {
3284             if (ref($rule)) {
3285                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3286             } else {
3287                 die "rule $rule as string - should not happen";
3288             }
3289         }
3290     }
3291 }
3292
3293 sub generate_ipset_chains {
3294     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3295
3296     foreach my $ipset (keys %{$ipsets}) {
3297
3298         my $options = $ipsets->{$ipset};
3299
3300         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3301             if (my $ips = $device_ips->{$1}) {
3302                 $options = [@$options, @$ips];
3303             }
3304         }
3305
3306         # remove duplicates
3307         my $nethash = {};
3308         foreach my $entry (@$options) {
3309             next if $entry->{errors}; # skip entries with errors
3310             eval {
3311                 my ($cidr, $ver);
3312                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3313                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3314                 } else {
3315                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3316                 }
3317                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3318                 if ($ver == 6) {
3319                     # ip_compress_address takes an address only, no CIDR
3320                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3321                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3322                     $cidr .= $prefix_len if defined($prefix_len);
3323                     $cidr =~ s|/128$||;
3324                 } else {
3325                     $cidr =~ s|/32$||;
3326                 }
3327
3328                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3329             };
3330             warn $@ if $@;
3331         }
3332
3333         foreach my $ipversion (4, 6) {
3334             my $data = $nethash->{$ipversion};
3335
3336             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3337
3338             my $hashsize = scalar(@$options);
3339             if ($hashsize <= 64) {
3340                 $hashsize = 64;
3341             } else {
3342                 $hashsize = round_powerof2($hashsize);
3343             }
3344
3345             my $family = $ipversion == "6" ? "inet6" : "inet";
3346
3347             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3348
3349             foreach my $cidr (sort keys %$data) {
3350                 my $entry = $data->{$cidr};
3351
3352                 my $cmd = "add $name $cidr";
3353                 if ($entry->{nomatch}) {
3354                     if ($feature_ipset_nomatch) {
3355                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3356                     } else {
3357                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3358                     }
3359                 } else {
3360                     push @{$ipset_ruleset->{$name}}, $cmd;
3361                 }
3362             }
3363         }
3364     }
3365 }
3366
3367 sub round_powerof2 {
3368     my ($int) = @_;
3369
3370     $int--;
3371     $int |= $int >> $_ foreach (1,2,4,8,16);
3372     return ++$int;
3373 }
3374
3375 my $set_global_log_ratelimit = sub {
3376     my $cluster_opts = shift;
3377
3378     $global_log_ratelimit = '--limit 1/sec';
3379     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3380         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3381         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3382
3383         if ($limit->{enable}) {
3384             if (my $rate = $limit->{rate}) {
3385                 $global_log_ratelimit = "--limit $rate";
3386             }
3387             if (my $burst = $limit->{burst}) {
3388                 $global_log_ratelimit .= " --limit-burst $burst";
3389             }
3390         } else {
3391             $global_log_ratelimit = undef;
3392         }
3393     }
3394 };
3395
3396 sub load_clusterfw_conf {
3397     my ($filename) = @_;
3398
3399     $filename = $clusterfw_conf_filename if !defined($filename);
3400
3401     my $cluster_conf = {};
3402     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3403         $cluster_conf = parse_clusterfw_config($filename, $fh);
3404
3405         $set_global_log_ratelimit->($cluster_conf->{options});
3406     }
3407
3408     return $cluster_conf;
3409 }
3410
3411 sub save_clusterfw_conf {
3412     my ($cluster_conf) = @_;
3413
3414     my $raw = '';
3415
3416     my $options = $cluster_conf->{options};
3417     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3418
3419     my $aliases = $cluster_conf->{aliases};
3420     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3421
3422     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3423
3424     my $rules = $cluster_conf->{rules};
3425     if ($rules && scalar(@$rules)) {
3426         $raw .= "[RULES]\n\n";
3427         $raw .= &$format_rules($rules, 1);
3428         $raw .= "\n";
3429     }
3430
3431     if ($cluster_conf->{groups}) {
3432         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3433             my $rules = $cluster_conf->{groups}->{$group};
3434             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3435                 my $utf8comment = encode('utf8', $comment);
3436                 $raw .= "[group $group] # $utf8comment\n\n";
3437             } else {
3438                 $raw .= "[group $group]\n\n";
3439             }
3440
3441             $raw .= &$format_rules($rules, 0);
3442             $raw .= "\n";
3443         }
3444     }
3445
3446     if ($raw) {
3447         mkdir $pvefw_conf_dir;
3448         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3449     } else {
3450         unlink $clusterfw_conf_filename;
3451     }
3452 }
3453
3454 sub load_hostfw_conf {
3455     my ($cluster_conf, $filename) = @_;
3456
3457     $filename = $hostfw_conf_filename if !defined($filename);
3458
3459     my $hostfw_conf = {};
3460     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3461         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf);
3462     }
3463     return $hostfw_conf;
3464 }
3465
3466 sub save_hostfw_conf {
3467     my ($hostfw_conf) = @_;
3468
3469     my $raw = '';
3470
3471     my $options = $hostfw_conf->{options};
3472     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3473
3474     my $rules = $hostfw_conf->{rules};
3475     if ($rules && scalar(@$rules)) {
3476         $raw .= "[RULES]\n\n";
3477         $raw .= &$format_rules($rules, 1);
3478         $raw .= "\n";
3479     }
3480
3481     if ($raw) {
3482         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3483     } else {
3484         unlink $hostfw_conf_filename;
3485     }
3486 }
3487
3488 sub compile {
3489     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3490
3491     my $vmfw_configs;
3492
3493     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3494     $pve_std_chains = dclone($pve_std_chains_conf);
3495
3496     if ($vmdata) { # test mode
3497         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3498         my $filename = "$testdir/cluster.fw";
3499         $cluster_conf = load_clusterfw_conf($filename);
3500
3501         $filename = "$testdir/host.fw";
3502         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3503
3504         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3505     } else { # normal operation
3506         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3507
3508         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3509
3510         $vmdata = read_local_vm_config();
3511         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3512     }
3513
3514     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3515
3516     my $localnet;
3517     if ($cluster_conf->{aliases}->{local_network}) {
3518         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3519     } else {
3520         my $localnet_ver;
3521         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3522
3523         $cluster_conf->{aliases}->{local_network} = {
3524             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3525     }
3526
3527     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3528
3529     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
3530     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
3531     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3532     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3533
3534     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3535 }
3536
3537 sub compile_iptables_filter {
3538     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
3539
3540     my $ruleset = {};
3541
3542     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3543     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3544
3545     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3546
3547     my $hostfw_options = $hostfw_conf->{options} || {};
3548
3549     # fixme: what log level should we use here?
3550     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3551
3552     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3553     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3554
3555     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3556     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3557
3558     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3559
3560     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3561     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3562
3563     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3564
3565     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3566
3567     if ($hostfw_enable) {
3568         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3569         warn $@ if $@; # just to be sure - should not happen
3570     }
3571
3572     # generate firewall rules for QEMU VMs
3573     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3574         eval {
3575             my $conf = $vmdata->{qemu}->{$vmid};
3576             my $vmfw_conf = $vmfw_configs->{$vmid};
3577             return if !$vmfw_conf;
3578
3579             foreach my $netid (sort keys %$conf) {
3580                 next if $netid !~ m/^net(\d+)$/;
3581                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3582                 next if !$net->{firewall};
3583                 my $iface = "tap${vmid}i$1";
3584
3585                 my $macaddr = $net->{macaddr};
3586                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3587                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3588                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3589                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3590             }
3591         };
3592         warn $@ if $@; # just to be sure - should not happen
3593     }
3594
3595     # generate firewall rules for LXC containers
3596     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3597         eval {
3598             my $conf = $vmdata->{lxc}->{$vmid};
3599             my $vmfw_conf = $vmfw_configs->{$vmid};
3600             return if !$vmfw_conf;
3601
3602             if ($vmfw_conf->{options}->{enable}) {
3603                 foreach my $netid (sort keys %$conf) {
3604                     next if $netid !~ m/^net(\d+)$/;
3605                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3606                     next if !$net->{firewall};
3607                     my $iface = "veth${vmid}i$1";
3608                     my $macaddr = $net->{hwaddr};
3609                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3610                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3611                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3612                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3613                 }
3614             }
3615         };
3616         warn $@ if $@; # just to be sure - should not happen
3617     }
3618
3619     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3620         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3621     }
3622
3623     return $ruleset;
3624 }
3625
3626 sub mac_to_linklocal {
3627     my ($macaddr) = @_;
3628     my @parts = split(/:/, $macaddr);
3629     # The standard link local address uses the fe80::/64 prefix with the
3630     # modified EUI-64 identifier derived from the MAC address by flipping the
3631     # universal/local bit and inserting FF:FE in the middle.
3632     # See RFC 4291.
3633     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3634     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3635     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3636 }
3637
3638 sub compile_ipsets {
3639     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3640
3641     my $localnet;
3642     if ($cluster_conf->{aliases}->{local_network}) {
3643         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3644     } else {
3645         my $localnet_ver;
3646         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3647
3648         $cluster_conf->{aliases}->{local_network} = {
3649             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3650     }
3651
3652     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3653
3654
3655     my $ipset_ruleset = {};
3656
3657     # generate ipsets for QEMU VMs
3658     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3659         eval {
3660             my $conf = $vmdata->{qemu}->{$vmid};
3661             my $vmfw_conf = $vmfw_configs->{$vmid};
3662             return if !$vmfw_conf;
3663
3664             # When the 'ipfilter' option is enabled every device for which there
3665             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3666             # ipset.
3667             # The reason is that ipfilter ipsets are always filled with standard
3668             # IPv6 link-local filters.
3669             my $ipsets = $vmfw_conf->{ipset};
3670             my $implicit_sets = {};
3671
3672             my $device_ips = {};
3673             foreach my $netid (keys %$conf) {
3674                 next if $netid !~ m/^net(\d+)$/;
3675                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3676                 next if !$net->{firewall};
3677
3678                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3679                     $implicit_sets->{"ipfilter-$netid"} = [];
3680                 }
3681
3682                 my $macaddr = $net->{macaddr};
3683                 my $linklocal = mac_to_linklocal($macaddr);
3684                 $device_ips->{$netid} = [
3685                     { cidr => $linklocal },
3686                     { cidr => 'fe80::/10', nomatch => 1 }
3687                 ];
3688             }
3689
3690             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3691             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3692         };
3693         warn $@ if $@; # just to be sure - should not happen
3694     }
3695
3696     # generate firewall rules for LXC containers
3697     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3698         eval {
3699             my $conf = $vmdata->{lxc}->{$vmid};
3700             my $vmfw_conf = $vmfw_configs->{$vmid};
3701             return if !$vmfw_conf;
3702
3703             # When the 'ipfilter' option is enabled every device for which there
3704             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3705             # ipset.
3706             # The reason is that ipfilter ipsets are always filled with standard
3707             # IPv6 link-local filters, as well as the IP addresses configured
3708             # for the container.
3709             my $ipsets = $vmfw_conf->{ipset};
3710             my $implicit_sets = {};
3711
3712             my $device_ips = {};
3713             foreach my $netid (keys %$conf) {
3714                 next if $netid !~ m/^net(\d+)$/;
3715                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3716                 next if !$net->{firewall};
3717
3718                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3719                     $implicit_sets->{"ipfilter-$netid"} = [];
3720                 }
3721
3722                 my $macaddr = $net->{hwaddr};
3723                 my $linklocal = mac_to_linklocal($macaddr);
3724                 my $set = $device_ips->{$netid} = [
3725                     { cidr => $linklocal },
3726                     { cidr => 'fe80::/10', nomatch => 1 }
3727                 ];
3728                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3729                     push @$set, { cidr => $1 };
3730                 }
3731                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3732                     push @$set, { cidr => $1 };
3733                 }
3734             }
3735
3736             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3737             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3738         };
3739         warn $@ if $@; # just to be sure - should not happen
3740     }
3741
3742     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3743
3744     return $ipset_ruleset;
3745 }
3746
3747 sub compile_ebtables_filter {
3748     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3749
3750     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3751         return {};
3752     }
3753
3754     my $ruleset = {};
3755
3756     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3757
3758     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3759     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3760     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3761     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3762     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3763
3764     # generate firewall rules for QEMU VMs
3765     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3766         eval {
3767             my $conf = $vmdata->{qemu}->{$vmid};
3768             my $vmfw_conf = $vmfw_configs->{$vmid};
3769             return if !$vmfw_conf;
3770             my $ipsets = $vmfw_conf->{ipset};
3771
3772             foreach my $netid (sort keys %$conf) {
3773                 next if $netid !~ m/^net(\d+)$/;
3774                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3775                 next if !$net->{firewall};
3776                 my $iface = "tap${vmid}i$1";
3777                 my $macaddr = $net->{macaddr};
3778                 my $arpfilter = [];
3779                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3780                     foreach my $ipaddr (@$ipset) {
3781                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3782                         next if !$ip || ($version && $version != 4);
3783                         push(@$arpfilter, $ip);
3784                     }
3785                 }
3786                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3787             }
3788         };
3789         warn $@ if $@; # just to be sure - should not happen
3790     }
3791
3792     # generate firewall rules for LXC containers
3793     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3794         eval {
3795             my $conf = $vmdata->{lxc}->{$vmid};
3796
3797             my $vmfw_conf = $vmfw_configs->{$vmid};
3798             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3799             my $ipsets = $vmfw_conf->{ipset};
3800
3801             foreach my $netid (sort keys %$conf) {
3802                 next if $netid !~ m/^net(\d+)$/;
3803                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3804                 next if !$net->{firewall};
3805                 my $iface = "veth${vmid}i$1";
3806                 my $macaddr = $net->{hwaddr};
3807                 my $arpfilter = [];
3808                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3809                     foreach my $ipaddr (@$ipset) {
3810                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3811                         next if !$ip || ($version && $version != 4);
3812                         push(@$arpfilter, $ip);
3813                     }
3814                 }
3815                 push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
3816                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3817             }
3818         };
3819         warn $@ if $@; # just to be sure - should not happen
3820     }
3821
3822     return $ruleset;
3823 }
3824
3825 sub generate_tap_layer2filter {
3826     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3827     my $options = $vmfw_conf->{options};
3828
3829     my $tapchain = $iface."-OUT";
3830
3831     # ebtables remove zeros from mac pairs
3832     $macaddr =~ s/0([0-9a-f])/$1/ig;
3833     $macaddr = lc($macaddr);
3834
3835     ruleset_create_chain($ruleset, $tapchain);
3836
3837     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3838             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3839     }
3840
3841     if (@$arpfilter){
3842         my $arpchain = $tapchain."-ARP";
3843         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3844         ruleset_create_chain($ruleset, $arpchain);
3845
3846         foreach my $ip (@{$arpfilter}) {
3847             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3848         }
3849         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3850     }
3851
3852     if (defined($options->{layer2_protocols})){
3853         my $protochain = $tapchain."-PROTO";
3854         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3855         ruleset_create_chain($ruleset, $protochain);
3856
3857         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3858             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3859         }
3860         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3861     }
3862
3863     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3864
3865     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3866 }
3867
3868 # the parameter $change_only_regex changes two things if defined:
3869 # * all chains not matching it will be left intact
3870 # * both the $active_chains hash and the returned status_hash have different
3871 #   structure (they contain a key named 'rules').
3872 sub get_ruleset_status {
3873     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3874
3875     my $statushash = {};
3876
3877     foreach my $chain (sort keys %$ruleset) {
3878         my $rules = $ruleset->{$chain};
3879         my $sig = &$digest_fn($rules);
3880         my $oldsig;
3881
3882         $statushash->{$chain}->{sig} = $sig;
3883         if (defined($change_only_regex)) {
3884             $oldsig = $active_chains->{$chain}->{sig};
3885             $statushash->{$chain}->{rules} = $rules;
3886         } else {
3887             $oldsig = $active_chains->{$chain};
3888         }
3889         if (!defined($oldsig)) {
3890             $statushash->{$chain}->{action} = 'create';
3891         } else {
3892             if ($oldsig eq $sig) {
3893                 $statushash->{$chain}->{action} = 'exists';
3894             } else {
3895                 $statushash->{$chain}->{action} = 'update';
3896             }
3897         }
3898         if ($verbose) {
3899             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3900             foreach my $cmd (@{$rules}) {
3901                 print "\t$cmd\n";
3902             }
3903         }
3904     }
3905
3906     foreach my $chain (sort keys %$active_chains) {
3907         next if defined($ruleset->{$chain});
3908         my $action = 'delete';
3909         my $sig = $active_chains->{$chain};
3910         if (defined($change_only_regex)) {
3911             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3912             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3913             $sig = $sig->{sig};
3914         }
3915         $statushash->{$chain}->{action} = $action;
3916         $statushash->{$chain}->{sig} = $sig;
3917         print "$action $chain ($sig)\n" if $verbose;
3918     }
3919
3920     return $statushash;
3921 }
3922
3923 sub print_sig_rule {
3924     my ($chain, $sig) = @_;
3925
3926     # We just use this to store a SHA1 checksum used to detect changes
3927     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3928 }
3929
3930 sub get_ruleset_cmdlist {
3931     my ($ruleset, $iptablescmd) = @_;
3932
3933     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3934
3935     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3936     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3937
3938     # create missing chains first
3939     foreach my $chain (sort keys %$ruleset) {
3940         my $stat = $statushash->{$chain};
3941         die "internal error" if !$stat;
3942         next if $stat->{action} ne 'create';
3943
3944         $cmdlist .= ":$chain - [0:0]\n";
3945     }
3946
3947     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3948         my $chain = "PVEFW-$h";
3949         if ($ruleset->{$chain} && !$hooks->{$h}) {
3950             $cmdlist .= "-A $h -j $chain\n";
3951         }
3952     }
3953
3954     foreach my $chain (sort keys %$ruleset) {
3955         my $stat = $statushash->{$chain};
3956         die "internal error" if !$stat;
3957
3958         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3959             $cmdlist .= "-F $chain\n";
3960             foreach my $cmd (@{$ruleset->{$chain}}) {
3961                 $cmdlist .= "$cmd\n";
3962             }
3963             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3964         } elsif ($stat->{action} eq 'delete') {
3965             die "internal error"; # this should not happen
3966         } elsif ($stat->{action} eq 'exists') {
3967             # do nothing
3968         } else {
3969             die "internal error - unknown status '$stat->{action}'";
3970         }
3971     }
3972
3973     foreach my $chain (keys %$statushash) {
3974         next if $statushash->{$chain}->{action} ne 'delete';
3975         $cmdlist .= "-F $chain\n";
3976     }
3977     foreach my $chain (keys %$statushash) {
3978         next if $statushash->{$chain}->{action} ne 'delete';
3979         next if $chain eq 'PVEFW-INPUT';
3980         next if $chain eq 'PVEFW-OUTPUT';
3981         next if $chain eq 'PVEFW-FORWARD';
3982         $cmdlist .= "-X $chain\n";
3983     }
3984
3985     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3986
3987     $cmdlist .= "COMMIT\n";
3988
3989     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3990 }
3991
3992 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3993
3994 sub get_ebtables_cmdlist {
3995     my ($ruleset) = @_;
3996
3997     my $changes = 0;
3998     my $cmdlist = "*filter\n";
3999
4000     my $active_chains = ebtables_get_chains();
4001     my $statushash = get_ruleset_status($ruleset, $active_chains,
4002                                         \&iptables_chain_digest,
4003                                         $pve_ebtables_chainname_regex);
4004
4005     # create chains first and make sure PVE rules are evaluated if active
4006     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4007     my $pve_include = 0;
4008     foreach my $chain (sort keys %$statushash) {
4009         next if ($statushash->{$chain}->{action} eq 'delete');
4010         $cmdlist .= ":$chain ACCEPT\n";
4011         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4012     }
4013
4014     foreach my $chain (sort keys %$statushash) {
4015         my $stat = $statushash->{$chain};
4016         next if ($stat->{action} eq 'delete');
4017         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4018
4019         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4020             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4021                 next if ! $pve_include;
4022                 $pve_include = 0;
4023             }
4024             $cmdlist .= "$cmd\n";
4025         }
4026     }
4027     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4028
4029     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4030 }
4031
4032 sub get_ipset_cmdlist {
4033     my ($ruleset) = @_;
4034
4035     my $cmdlist = "";
4036
4037     my $delete_cmdlist = "";
4038
4039     my $active_chains = ipset_get_chains();
4040     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4041
4042     # remove stale _swap chains
4043     foreach my $chain (keys %$active_chains) {
4044         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4045             $cmdlist .= "destroy $chain\n";
4046         }
4047     }
4048
4049     foreach my $chain (keys %$ruleset) {
4050         my $stat = $statushash->{$chain};
4051         die "internal error" if !$stat;
4052
4053         if ($stat->{action} eq 'create') {
4054             foreach my $cmd (@{$ruleset->{$chain}}) {
4055                 $cmdlist .= "$cmd\n";
4056             }
4057         }
4058     }
4059
4060     foreach my $chain (keys %$ruleset) {
4061         my $stat = $statushash->{$chain};
4062         die "internal error" if !$stat;
4063
4064         if ($stat->{action} eq 'update') {
4065             my $chain_swap = $chain."_swap";
4066
4067             foreach my $cmd (@{$ruleset->{$chain}}) {
4068                 $cmd =~ s/$chain/$chain_swap/;
4069                 $cmdlist .= "$cmd\n";
4070             }
4071             $cmdlist .= "swap $chain_swap $chain\n";
4072             $cmdlist .= "flush $chain_swap\n";
4073             $cmdlist .= "destroy $chain_swap\n";
4074         }
4075     }
4076
4077      # the remove unused chains
4078     foreach my $chain (keys %$statushash) {
4079         next if $statushash->{$chain}->{action} ne 'delete';
4080
4081         $delete_cmdlist .= "flush $chain\n";
4082         $delete_cmdlist .= "destroy $chain\n";
4083     }
4084
4085     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4086
4087     return ($cmdlist, $delete_cmdlist, $changes);
4088 }
4089
4090 sub apply_ruleset {
4091     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4092
4093     enable_bridge_firewall();
4094
4095     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4096         get_ipset_cmdlist($ipset_ruleset);
4097
4098     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4099     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4100     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4101
4102     if ($verbose) {
4103         if ($ipset_changes) {
4104             print "ipset changes:\n";
4105             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4106             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4107         }
4108
4109         if ($changes) {
4110             print "iptables changes:\n";
4111             print $cmdlist;
4112         }
4113
4114         if ($changesv6) {
4115             print "ip6tables changes:\n";
4116             print $cmdlistv6;
4117         }
4118
4119         if ($ebtables_changes) {
4120             print "ebtables changes:\n";
4121             print $ebtables_cmdlist;
4122         }
4123     }
4124
4125     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4126     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4127
4128     ipset_restore_cmdlist($ipset_create_cmdlist);
4129
4130     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4131     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4132
4133     iptables_restore_cmdlist($cmdlist);
4134
4135     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4136     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4137
4138     ip6tables_restore_cmdlist($cmdlistv6);
4139
4140     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4141     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4142
4143     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4144
4145     ebtables_restore_cmdlist($ebtables_cmdlist);
4146
4147     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4148     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4149
4150     # test: re-read status and check if everything is up to date
4151     my $active_chains = iptables_get_chains();
4152     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4153
4154     my $errors;
4155     foreach my $chain (sort keys %$ruleset) {
4156         my $stat = $statushash->{$chain};
4157         if ($stat->{action} ne 'exists') {
4158             warn "unable to update chain '$chain'\n";
4159             $errors = 1;
4160         }
4161     }
4162
4163     my $active_chainsv6 = iptables_get_chains("ip6tables");
4164     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
4165
4166     foreach my $chain (sort keys %$rulesetv6) {
4167         my $stat = $statushashv6->{$chain};
4168         if ($stat->{action} ne 'exists') {
4169             warn "unable to update chain '$chain'\n";
4170             $errors = 1;
4171         }
4172     }
4173
4174     my $active_ebtables_chains = ebtables_get_chains();
4175     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4176                                 $active_ebtables_chains, \&iptables_chain_digest,
4177                                 $pve_ebtables_chainname_regex);
4178
4179     foreach my $chain (sort keys %$ebtables_ruleset) {
4180         my $stat = $ebtables_statushash->{$chain};
4181         if ($stat->{action} ne 'exists') {
4182             warn "ebtables : unable to update chain '$chain'\n";
4183             $errors = 1;
4184         }
4185     }
4186
4187     die "unable to apply firewall changes\n" if $errors;
4188
4189     update_nf_conntrack_max($hostfw_conf);
4190
4191     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4192
4193     update_nf_conntrack_logging($hostfw_conf);
4194 }
4195
4196 sub update_nf_conntrack_max {
4197     my ($hostfw_conf) = @_;
4198
4199     my $max = 65536; # reasonable default
4200
4201     my $options = $hostfw_conf->{options} || {};
4202
4203     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4204         $max = $options->{nf_conntrack_max};
4205         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4206     }
4207
4208     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4209     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4210
4211     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4212
4213     if ($current != $max) {
4214         my $hashsize = int($max/4);
4215         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4216         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4217     }
4218 }
4219
4220 sub update_nf_conntrack_tcp_timeout_established {
4221     my ($hostfw_conf) = @_;
4222
4223     my $options = $hostfw_conf->{options} || {};
4224
4225     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4226
4227     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4228 }
4229
4230 my $log_nf_conntrack_enabled = undef;
4231 sub update_nf_conntrack_logging {
4232     my ($hostfw_conf) = @_;
4233
4234     my $options = $hostfw_conf->{options} || {};
4235     my $value = $options->{log_nf_conntrack} || 0;
4236     if (!defined($log_nf_conntrack_enabled)
4237         || $value != $log_nf_conntrack_enabled)
4238     {
4239         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4240         PVE::Tools::file_set_contents($tmpfile, $value);
4241
4242         PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4243         $log_nf_conntrack_enabled = $value;
4244     }
4245 }
4246
4247 sub remove_pvefw_chains {
4248
4249     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4250     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4251     PVE::Firewall::remove_pvefw_chains_ipset();
4252
4253 }
4254
4255 sub remove_pvefw_chains_iptables {
4256     my ($iptablescmd) = @_;
4257
4258     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4259     my $cmdlist = "*filter\n";
4260
4261     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4262         if ($hooks->{$h}) {
4263             $cmdlist .= "-D $h -j PVEFW-$h\n";
4264         }
4265     }
4266
4267     foreach my $chain (keys %$chash) {
4268         $cmdlist .= "-F $chain\n";
4269     }
4270
4271     foreach my $chain (keys %$chash) {
4272         $cmdlist .= "-X $chain\n";
4273     }
4274     $cmdlist .= "COMMIT\n";
4275
4276     if($iptablescmd eq "ip6tables") {
4277         ip6tables_restore_cmdlist($cmdlist);
4278     } else {
4279         iptables_restore_cmdlist($cmdlist);
4280     }
4281 }
4282
4283 sub remove_pvefw_chains_ipset {
4284
4285     my $ipset_chains = ipset_get_chains();
4286
4287     my $cmdlist = "";
4288
4289     foreach my $chain (keys %$ipset_chains) {
4290         $cmdlist .= "flush $chain\n";
4291         $cmdlist .= "destroy $chain\n";
4292     }
4293
4294     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4295 }
4296
4297 sub init {
4298     my $cluster_conf = load_clusterfw_conf();
4299     my $cluster_options = $cluster_conf->{options};
4300     my $enable = $cluster_options->{enable};
4301
4302     return if !$enable;
4303
4304     # load required modules here
4305 }
4306
4307 sub update {
4308     my $code = sub {
4309
4310         my $cluster_conf = load_clusterfw_conf();
4311         my $cluster_options = $cluster_conf->{options};
4312
4313         if (!$cluster_options->{enable}) {
4314             PVE::Firewall::remove_pvefw_chains();
4315             return;
4316         }
4317
4318         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4319
4320         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4321
4322         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4323     };
4324
4325     run_locked($code);
4326 }
4327
4328 1;