src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5
   6 use Digest::SHA;
   7 use Encode;
   8 use File::Basename;
   9 use File::Path;
  10 use IO::File;
  11 use Net::IP;
  12 use POSIX;
  13 use Socket qw(AF_INET6 inet_ntop inet_pton);
  14 use Storable qw(dclone);
  15
  16 use PVE::Cluster;
  17 use PVE::Exception qw(raise raise_param_exc);
  18 use PVE::INotify;
  19 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  20 use PVE::Network;
  21 use PVE::ProcFSTools;
  22 use PVE::SafeSyslog;
  23 use PVE::Tools qw($IPV4RE $IPV6RE);
  24 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  25
  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 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  45
  46 mkdir $pve_fw_status_dir; # make sure this exists
  47
  48 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51
  52 my $max_alias_name_length = 64;
  53 my $max_ipset_name_length = 64;
  54 my $max_group_name_length = 18;
  55
  56 my $PROTOCOLS_WITH_PORTS = {
  57     udp => 1,     17 => 1,
  58     udplite => 1, 136 => 1,
  59     tcp => 1,     6 => 1,
  60     dccp => 1,    33 => 1,
  61     sctp => 1,    132 => 1,
  62 };
  63
  64 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  65 sub pve_verify_ip_or_cidr {
  66     my ($cidr, $noerr) = @_;
  67
  68     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  69         return $cidr if Net::IP->new($cidr);
  70         return undef if $noerr;
  71         die Net::IP::Error() . "\n";
  72     }
  73     return undef if $noerr;
  74     die "value does not look like a valid IP address or CIDR network\n";
  75 }
  76
  77 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  78 sub pve_verify_ip_or_cidr_or_alias {
  79     my ($cidr, $noerr) = @_;
  80
  81     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  82
  83     return pve_verify_ip_or_cidr($cidr, $noerr);
  84 }
  85
  86 PVE::JSONSchema::register_standard_option('ipset-name', {
  87     description => "IP set name.",
  88     type => 'string',
  89     pattern => $ipset_name_pattern,
  90     minLength => 2,
  91     maxLength => $max_ipset_name_length,
  92 });
  93
  94 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  95     description => "Alias name.",
  96     type => 'string',
  97     pattern => $ip_alias_pattern,
  98     minLength => 2,
  99     maxLength => $max_alias_name_length,
 100 });
 101
 102 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 103     description => "Log level.",
 104     type => 'string',
 105     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 106     optional => 1,
 107 });
 108
 109 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 110     description => "Security Group name.",
 111     type => 'string',
 112     pattern => $security_group_name_pattern,
 113     minLength => 2,
 114     maxLength => $max_group_name_length,
 115 });
 116
 117 my $feature_ipset_nomatch = 0;
 118 eval  {
 119     my (undef, undef, $release) = POSIX::uname();
 120     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 121         my ($major, $minor) = ($1, $2);
 122         $feature_ipset_nomatch = 1 if ($major > 3) ||
 123             ($major == 3 && $minor >= 7);
 124     }
 125
 126 };
 127
 128 my $nodename = PVE::INotify::nodename();
 129 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
 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         { action => 'DROP', proto => 'icmpv6' },
 670         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 671         { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
 672         { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
 673     ],
 674     'PVEFW-Drop' => [
 675         # same as shorewall 'Drop', which is equal to DROP,
 676         # but REJECT/DROP some packages to reduce logging,
 677         # and ACCEPT critical ICMP types
 678         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 679         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 680         { action => 'PVEFW-DropBroadcast' },
 681         # ACCEPT critical ICMP types
 682         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 683         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 684         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 685         # Drop packets with INVALID state
 686         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 687         # Drop Microsoft SMB noise
 688         { action => 'DROP', proto => 'udp', dport => '135,445' },
 689         { action => 'DROP', proto => 'udp', dport => '137:139'},
 690         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 691         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 692         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 693         # Drop new/NotSyn traffic so that it doesn't get logged
 694         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 695         # Drop DNS replies
 696         { action => 'DROP', proto => 'udp', sport => 53 },
 697     ],
 698     'PVEFW-Reject' => [
 699         # same as shorewall 'Reject', which is equal to Reject,
 700         # but REJECT/DROP some packages to reduce logging,
 701         # and ACCEPT critical ICMP types
 702         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 703         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 704         { action => 'PVEFW-DropBroadcast' },
 705         # ACCEPT critical ICMP types
 706         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 707         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 708         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 709         # Drop packets with INVALID state
 710         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 711         # Drop Microsoft SMB noise
 712         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 713         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 714         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 715         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 716         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 717         # Drop new/NotSyn traffic so that it doesn't get logged
 718         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 719         # Drop DNS replies
 720         { action => 'DROP', proto => 'udp', sport => 53 },
 721     ],
 722     'PVEFW-tcpflags' => [
 723         # same as shorewall tcpflags action.
 724         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 725         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 726         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 727         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 728         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 729         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 730     ],
 731     'PVEFW-logflags' => [
 732         { action => 'DROP', logmsg => 'DROP: ' },
 733     ],
 734 };
 735
 736 # iptables -p icmp -h
 737 my $icmp_type_names = {
 738     any => 1,
 739     'echo-reply' => 1,
 740     'destination-unreachable' => 1,
 741     'network-unreachable' => 1,
 742     'host-unreachable' => 1,
 743     'protocol-unreachable' => 1,
 744     'port-unreachable' => 1,
 745     'fragmentation-needed' => 1,
 746     'source-route-failed' => 1,
 747     'network-unknown' => 1,
 748     'host-unknown' => 1,
 749     'network-prohibited' => 1,
 750     'host-prohibited' => 1,
 751     'TOS-network-unreachable' => 1,
 752     'TOS-host-unreachable' => 1,
 753     'communication-prohibited' => 1,
 754     'host-precedence-violation' => 1,
 755     'precedence-cutoff' => 1,
 756     'source-quench' => 1,
 757     'redirect' => 1,
 758     'network-redirect' => 1,
 759     'host-redirect' => 1,
 760     'TOS-network-redirect' => 1,
 761     'TOS-host-redirect' => 1,
 762     'echo-request' => 1,
 763     'router-advertisement' => 1,
 764     'router-solicitation' => 1,
 765     'time-exceeded' => 1,
 766     'ttl-zero-during-transit' => 1,
 767     'ttl-zero-during-reassembly' => 1,
 768     'parameter-problem' => 1,
 769     'ip-header-bad' => 1,
 770     'required-option-missing' => 1,
 771     'timestamp-request' => 1,
 772     'timestamp-reply' => 1,
 773     'address-mask-request' => 1,
 774     'address-mask-reply' => 1,
 775 };
 776
 777 # ip6tables -p icmpv6 -h
 778
 779 my $icmpv6_type_names = {
 780     'any' => 1,
 781     'destination-unreachable' => 1,
 782     'no-route' => 1,
 783     'communication-prohibited' => 1,
 784     'address-unreachable' => 1,
 785     'port-unreachable' => 1,
 786     'packet-too-big' => 1,
 787     'time-exceeded' => 1,
 788     'ttl-zero-during-transit' => 1,
 789     'ttl-zero-during-reassembly' => 1,
 790     'parameter-problem' => 1,
 791     'bad-header' => 1,
 792     'unknown-header-type' => 1,
 793     'unknown-option' => 1,
 794     'echo-request' => 1,
 795     'echo-reply' => 1,
 796     'router-solicitation' => 1,
 797     'router-advertisement' => 1,
 798     'neighbor-solicitation' => 1,
 799     'neighbour-solicitation' => 1,
 800     'neighbor-advertisement' => 1,
 801     'neighbour-advertisement' => 1,
 802     'redirect' => 1,
 803 };
 804
 805 sub init_firewall_macros {
 806
 807     $pve_fw_parsed_macros = {};
 808
 809     my $parse = sub {
 810         my ($k, $macro) = @_;
 811         my $lc_name = lc($k);
 812         $pve_fw_macro_ipversion->{$k} = 0;
 813         while (!ref($macro->[0])) {
 814             my $desc = shift @$macro;
 815             if ($desc eq 'ipv4only') {
 816                 $pve_fw_macro_ipversion->{$k} = 4;
 817             } elsif ($desc eq 'ipv6only') {
 818                 $pve_fw_macro_ipversion->{$k} = 6;
 819             } else {
 820                 $pve_fw_macro_descr->{$k} = $desc;
 821             }
 822         }
 823         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 824         $pve_fw_parsed_macros->{$k} = $macro;
 825     };
 826
 827     foreach my $k (keys %$pve_fw_macros) {
 828         &$parse($k, $pve_fw_macros->{$k});
 829     }
 830
 831     foreach my $k (keys %$pve_ipv6fw_macros) {
 832         next if $pve_fw_parsed_macros->{$k};
 833         &$parse($k, $pve_ipv6fw_macros->{$k});
 834         $pve_fw_macro_ipversion->{$k} = 6;
 835     }
 836 }
 837
 838 init_firewall_macros();
 839
 840 sub get_macros {
 841     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 842 }
 843
 844 my $etc_services;
 845
 846 sub get_etc_services {
 847
 848     return $etc_services if $etc_services;
 849
 850     my $filename = "/etc/services";
 851
 852     my $fh = IO::File->new($filename, O_RDONLY);
 853     if (!$fh) {
 854         warn "unable to read '$filename' - $!\n";
 855         return {};
 856     }
 857
 858     my $services = {};
 859
 860     while (my $line = <$fh>) {
 861         chomp ($line);
 862         next if $line =~m/^#/;
 863         next if ($line =~m/^\s*$/);
 864
 865         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 866             $services->{byid}->{$2}->{name} = $1;
 867             $services->{byid}->{$2}->{port} = $2;
 868             $services->{byid}->{$2}->{$3} = 1;
 869             $services->{byname}->{$1} = $services->{byid}->{$2};
 870         }
 871     }
 872
 873     close($fh);
 874
 875     $etc_services = $services;
 876
 877
 878     return $etc_services;
 879 }
 880
 881 sub parse_protocol_file {
 882     my ($filename) = @_;
 883
 884     my $fh = IO::File->new($filename, O_RDONLY);
 885     if (!$fh) {
 886         warn "unable to read '$filename' - $!\n";
 887         return {};
 888     }
 889
 890     my $protocols = {};
 891
 892     while (my $line = <$fh>) {
 893         chomp ($line);
 894         next if $line =~m/^#/;
 895         next if ($line =~m/^\s*$/);
 896
 897         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 898             $protocols->{byid}->{$2}->{name} = $1;
 899             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 900         }
 901     }
 902
 903     close($fh);
 904
 905     return $protocols;
 906 }
 907
 908 my $etc_protocols;
 909
 910 sub get_etc_protocols {
 911     return $etc_protocols if $etc_protocols;
 912
 913     my $protocols = parse_protocol_file('/etc/protocols');
 914
 915     # add special case for ICMP v6
 916     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 917     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 918
 919     $etc_protocols = $protocols;
 920
 921     return $etc_protocols;
 922 }
 923
 924 my $etc_ethertypes;
 925
 926 sub get_etc_ethertypes {
 927     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 928         if !$etc_ethertypes;
 929     return $etc_ethertypes;
 930 }
 931
 932 my $__local_network;
 933
 934 sub local_network {
 935     my ($new_value) = @_;
 936
 937     $__local_network = $new_value if defined($new_value);
 938
 939     return $__local_network if defined($__local_network);
 940
 941     eval {
 942         my $nodename = PVE::INotify::nodename();
 943
 944         my $ip = PVE::Cluster::remote_node_ip($nodename);
 945
 946         my $testip = Net::IP->new($ip);
 947
 948         my $isv6 = $testip->version == 6;
 949         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 950                            : PVE::ProcFSTools::read_proc_net_route();
 951         foreach my $entry (@$routes) {
 952             my $mask;
 953             if ($isv6) {
 954                 $mask = $entry->{prefix};
 955                 next if !$mask; # skip the default route...
 956             } else {
 957                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 958                 next if !defined($mask);
 959             }
 960             my $cidr = "$entry->{dest}/$mask";
 961             my $testnet = Net::IP->new($cidr);
 962             my $overlap = $testnet->overlaps($testip);
 963             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 964                 $overlap == $Net::IP::IP_IDENTICAL)
 965             {
 966                 $__local_network = $cidr;
 967                 return;
 968             }
 969         }
 970     };
 971     warn $@ if $@;
 972
 973     return $__local_network;
 974 }
 975
 976 # ipset names are limited to 31 characters,
 977 # and we use '-v4' or '-v6' to indicate IP versions,
 978 # and we use '_swap' suffix for atomic update,
 979 # for example PVEFW-${VMID}-${ipset_name}_swap
 980
 981 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 982
 983 sub compute_ipset_chain_name {
 984     my ($vmid, $ipset_name, $ipversion) = @_;
 985
 986     $vmid = 0 if !defined($vmid);
 987
 988     my $id = "$vmid-${ipset_name}-v$ipversion";
 989
 990     if (length($id) > $max_iptables_ipset_name_length) {
 991         $id = PVE::Tools::fnv31a_hex($id);
 992     }
 993
 994     return "PVEFW-$id";
 995 }
 996
 997 sub compute_ipfilter_ipset_name {
 998     my ($iface) = @_;
 999
1000     return "ipfilter-$iface";
1001 }
1002
1003 sub parse_address_list {
1004     my ($str) = @_;
1005
1006     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1007         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1008         return;
1009     }
1010
1011     if ($str =~ m/^${ip_alias_pattern}$/) {
1012         die "alias name too long\n" if length($str) > $max_alias_name_length;
1013         return;
1014     }
1015
1016     my $count = 0;
1017     my $iprange = 0;
1018     my $ipversion;
1019
1020     my @elements = split(/,/, $str);
1021     die "extraneous commas in list\n" if $str ne join(',', @elements);
1022     foreach my $elem (@elements) {
1023         $count++;
1024         my $ip = Net::IP->new($elem);
1025         if (!$ip) {
1026             my $err = Net::IP::Error();
1027             die "invalid IP address: $err\n";
1028         }
1029         $iprange = 1 if $elem =~ m/-/;
1030
1031         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1032
1033         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1034             if $ipversion && ($new_ipversion != $ipversion);
1035
1036         $ipversion = $new_ipversion;
1037     }
1038
1039     die "you can't use a range in a list\n" if $iprange && $count > 1;
1040
1041     return $ipversion;
1042 }
1043
1044 sub parse_port_name_number_or_range {
1045     my ($str, $dport) = @_;
1046
1047     my $services = PVE::Firewall::get_etc_services();
1048     my $count = 0;
1049     my $icmp_port = 0;
1050
1051     my @elements = split(/,/, $str);
1052     die "extraneous commas in list\n" if $str ne join(',', @elements);
1053     foreach my $item (@elements) {
1054         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1055             $count += 2;
1056             my ($port1, $port2) = ($1, $2);
1057             die "invalid port '$port1'\n" if $port1 > 65535;
1058             die "invalid port '$port2'\n" if $port2 > 65535;
1059             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1060         } elsif ($item =~ m/^([0-9]+)$/) {
1061             $count += 1;
1062             my $port = $1;
1063             die "invalid port '$port'\n" if $port > 65535;
1064         } else {
1065             if ($dport && $icmp_type_names->{$item}) {
1066                 $icmp_port = 1;
1067             } elsif ($dport && $icmpv6_type_names->{$item}) {
1068                 $icmp_port = 1;
1069             } else {
1070                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1071             }
1072         }
1073     }
1074
1075     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1076
1077     # I really don't like to use the word number here, but it's the only thing
1078     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1079     # one and not as 100...
1080     die "too many entries in port list (> 15 numbers)\n"
1081         if $count > 15;
1082
1083     return (scalar(@elements) > 1);
1084 }
1085
1086 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1087 sub pve_fw_verify_sport_spec {
1088    my ($portstr) = @_;
1089
1090    parse_port_name_number_or_range($portstr, 0);
1091
1092    return $portstr;
1093 }
1094
1095 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1096 sub pve_fw_verify_dport_spec {
1097    my ($portstr) = @_;
1098
1099    parse_port_name_number_or_range($portstr, 1);
1100
1101    return $portstr;
1102 }
1103
1104 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1105 sub pve_fw_verify_addr_spec {
1106    my ($list) = @_;
1107
1108    parse_address_list($list);
1109
1110    return $list;
1111 }
1112
1113 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1114 sub pve_fw_verify_protocol_spec {
1115    my ($proto) = @_;
1116
1117    my $protocols = get_etc_protocols();
1118
1119    die "unknown protocol '$proto'\n" if $proto &&
1120        !(defined($protocols->{byname}->{$proto}) ||
1121          defined($protocols->{byid}->{$proto}));
1122
1123    return $proto;
1124 }
1125
1126
1127 # helper function for API
1128
1129 sub copy_opject_with_digest {
1130     my ($object) = @_;
1131
1132     my $sha = Digest::SHA->new('sha1');
1133
1134     my $res = {};
1135     foreach my $k (sort keys %$object) {
1136         my $v = $object->{$k};
1137         next if !defined($v);
1138         $res->{$k} = $v;
1139         $sha->add($k, ':', $v, "\n");
1140     }
1141
1142     my $digest = $sha->hexdigest;
1143
1144     $res->{digest} = $digest;
1145
1146     return wantarray ? ($res, $digest) : $res;
1147 }
1148
1149 sub copy_list_with_digest {
1150     my ($list) = @_;
1151
1152     my $sha = Digest::SHA->new('sha1');
1153
1154     my $res = [];
1155     foreach my $entry (@$list) {
1156         my $data = {};
1157         foreach my $k (sort keys %$entry) {
1158             my $v = $entry->{$k};
1159             next if !defined($v);
1160             $data->{$k} = $v;
1161             # Note: digest ignores refs ($rule->{errors})
1162             # since Digest::SHA expects a series of bytes,
1163             #  we have to encode the value here to prevent errors when
1164             #  using utf8 characters (eg. in comments)
1165             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1166         }
1167         push @$res, $data;
1168     }
1169
1170     my $digest = $sha->hexdigest;
1171
1172     foreach my $entry (@$res) {
1173         $entry->{digest} = $digest;
1174     }
1175
1176     return wantarray ? ($res, $digest) : $res;
1177 }
1178
1179 our $cluster_option_properties = {
1180     enable => {
1181         description => "Enable or disable the firewall cluster wide.",
1182         type => 'integer',
1183         minimum => 0,
1184         optional => 1,
1185     },
1186     ebtables => {
1187         description => "Enable ebtables rules cluster wide.",
1188         type => 'boolean',
1189         default => 1,
1190         optional => 1,
1191     },
1192     policy_in => {
1193         description => "Input policy.",
1194         type => 'string',
1195         optional => 1,
1196         enum => ['ACCEPT', 'REJECT', 'DROP'],
1197     },
1198     policy_out => {
1199         description => "Output policy.",
1200         type => 'string',
1201         optional => 1,
1202         enum => ['ACCEPT', 'REJECT', 'DROP'],
1203     },
1204     log_ratelimit => {
1205         description => "Log ratelimiting settings",
1206         type => 'string', format => {
1207             enable => {
1208                 default_key => 1,
1209                 description => 'Enable or disable log rate limiting',
1210                 type => 'boolean',
1211                 default => '1',
1212             },
1213             rate => {
1214                 type => 'string',
1215                 description => 'Frequency with which the burst bucket gets refilled',
1216                 optional => 1,
1217                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1218                 format_description => 'rate',
1219                 default => '1/second',
1220             },
1221             burst => {
1222                 type => 'integer',
1223                 minimum => 0,
1224                 optional => 1,
1225                 description => 'Inital burst of packages which will get logged',
1226                 default => 5,
1227             },
1228         },
1229         optional => 1,
1230     },
1231 };
1232
1233 our $host_option_properties = {
1234     enable => {
1235         description => "Enable host firewall rules.",
1236         type => 'boolean',
1237         optional => 1,
1238     },
1239     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1240         description => "Log level for incoming traffic." }),
1241     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1242         description => "Log level for outgoing traffic." }),
1243     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1244         description => "Log level for illegal tcp flags filter." }),
1245     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1246         description => "Log level for SMURFS filter." }),
1247     nosmurfs => {
1248         description => "Enable SMURFS filter.",
1249         type => 'boolean',
1250         optional => 1,
1251     },
1252     tcpflags => {
1253         description => "Filter illegal combinations of TCP flags.",
1254         type => 'boolean',
1255         optional => 1,
1256     },
1257     nf_conntrack_max => {
1258         description => "Maximum number of tracked connections.",
1259         type => 'integer',
1260         optional => 1,
1261         minimum => 32768,
1262     },
1263     nf_conntrack_tcp_timeout_established => {
1264         description => "Conntrack established timeout.",
1265         type => 'integer',
1266         optional => 1,
1267         minimum => 7875,
1268     },
1269     ndp => {
1270         description => "Enable NDP.",
1271         type => 'boolean',
1272         optional => 1,
1273     },
1274     nf_conntrack_allow_invalid => {
1275         description => "Allow invalid packets on connection tracking.",
1276         type => 'boolean',
1277         default => 0,
1278         optional => 1,
1279     },
1280     log_nf_conntrack => {
1281         description => "Enable logging of conntrack information.",
1282         type => 'boolean',
1283         default => 0,
1284         optional => 1
1285     },
1286 };
1287
1288 our $vm_option_properties = {
1289     enable => {
1290         description => "Enable/disable firewall rules.",
1291         type => 'boolean',
1292         optional => 1,
1293     },
1294     macfilter => {
1295         description => "Enable/disable MAC address filter.",
1296         type => 'boolean',
1297         optional => 1,
1298     },
1299     dhcp => {
1300         description => "Enable DHCP.",
1301         type => 'boolean',
1302         optional => 1,
1303     },
1304     ndp => {
1305         description => "Enable NDP.",
1306         type => 'boolean',
1307         optional => 1,
1308     },
1309     radv => {
1310         description => "Allow sending Router Advertisement.",
1311         type => 'boolean',
1312         optional => 1,
1313     },
1314     ipfilter => {
1315         description => "Enable default IP filters. " .
1316            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1317            "for every interface. Such ipsets implicitly contain sane default " .
1318            "restrictions such as restricting IPv6 link local addresses to " .
1319            "the one derived from the interface's MAC address. For containers " .
1320            "the configured IP addresses will be implicitly added.",
1321         type => 'boolean',
1322         optional => 1,
1323     },
1324     policy_in => {
1325         description => "Input policy.",
1326         type => 'string',
1327         optional => 1,
1328         enum => ['ACCEPT', 'REJECT', 'DROP'],
1329     },
1330     policy_out => {
1331         description => "Output policy.",
1332         type => 'string',
1333         optional => 1,
1334         enum => ['ACCEPT', 'REJECT', 'DROP'],
1335     },
1336     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1337         description => "Log level for incoming traffic." }),
1338     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1339         description => "Log level for outgoing traffic." }),
1340
1341 };
1342
1343
1344 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.";
1345
1346 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.";
1347
1348 my $rule_properties = {
1349     pos => {
1350         description => "Update rule at position <pos>.",
1351         type => 'integer',
1352         minimum => 0,
1353         optional => 1,
1354     },
1355     digest => get_standard_option('pve-config-digest'),
1356     type => {
1357         description => "Rule type.",
1358         type => 'string',
1359         optional => 1,
1360         enum => ['in', 'out', 'group'],
1361     },
1362     action => {
1363         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1364         type => 'string',
1365         optional => 1,
1366         pattern => $security_group_name_pattern,
1367         maxLength => 20,
1368         minLength => 2,
1369     },
1370     macro => {
1371         description => "Use predefined standard macro.",
1372         type => 'string',
1373         optional => 1,
1374         maxLength => 128,
1375     },
1376     iface => get_standard_option('pve-iface', {
1377         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.",
1378         optional => 1
1379     }),
1380     source => {
1381         description => "Restrict packet source address. $addr_list_descr",
1382         type => 'string', format => 'pve-fw-addr-spec',
1383         optional => 1,
1384     },
1385     dest => {
1386         description => "Restrict packet destination address. $addr_list_descr",
1387         type => 'string', format => 'pve-fw-addr-spec',
1388         optional => 1,
1389     },
1390     proto => {
1391         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1392         type => 'string', format => 'pve-fw-protocol-spec',
1393         optional => 1,
1394     },
1395     enable => {
1396         description => "Flag to enable/disable a rule.",
1397         type => 'integer',
1398         minimum => 0,
1399         optional => 1,
1400     },
1401     log => get_standard_option('pve-fw-loglevel', {
1402         description => "Log level for firewall rule.",
1403     }),
1404     sport => {
1405         description => "Restrict TCP/UDP source port. $port_descr",
1406         type => 'string', format => 'pve-fw-sport-spec',
1407         optional => 1,
1408     },
1409     dport => {
1410         description => "Restrict TCP/UDP destination port. $port_descr",
1411         type => 'string', format => 'pve-fw-dport-spec',
1412         optional => 1,
1413     },
1414     comment => {
1415         description => "Descriptive comment.",
1416         type => 'string',
1417         optional => 1,
1418     },
1419 };
1420
1421 sub add_rule_properties {
1422     my ($properties) = @_;
1423
1424     foreach my $k (keys %$rule_properties) {
1425         my $h = $rule_properties->{$k};
1426         # copy data, so that we can modify later without side effects
1427         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1428     }
1429
1430     return $properties;
1431 }
1432
1433 sub delete_rule_properties {
1434     my ($rule, $delete_str) = @_;
1435
1436     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1437         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1438             if !defined($rule_properties->{$opt});
1439         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1440             if $opt eq 'type' || $opt eq 'action';
1441         delete $rule->{$opt};
1442     }
1443
1444     return $rule;
1445 }
1446
1447 my $apply_macro = sub {
1448     my ($macro_name, $param, $verify, $ipversion) = @_;
1449
1450     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1451     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1452
1453     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1454         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1455     }
1456
1457     # skip macros which are specific to another ipversion
1458     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1459         return if $ipversion != $required;
1460     }
1461
1462     my $rules = [];
1463
1464     foreach my $templ (@$macro_rules) {
1465         my $rule = {};
1466         my $param_used = {};
1467         foreach my $k (keys %$templ) {
1468             my $v = $templ->{$k};
1469             if ($v eq 'PARAM') {
1470                 $v = $param->{$k};
1471                 $param_used->{$k} = 1;
1472             } elsif ($v eq 'DEST') {
1473                 $v = $param->{dest};
1474                 $param_used->{dest} = 1;
1475             } elsif ($v eq 'SOURCE') {
1476                 $v = $param->{source};
1477                 $param_used->{source} = 1;
1478             }
1479
1480             if (!defined($v)) {
1481                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1482                 raise_param_exc({ macro => $msg }) if $verify;
1483                 die "$msg\n";
1484             }
1485             $rule->{$k} = $v;
1486         }
1487         foreach my $k (keys %$param) {
1488             next if $k eq 'macro';
1489             next if !defined($param->{$k});
1490             next if $param_used->{$k};
1491             if (defined($rule->{$k})) {
1492                 if ($rule->{$k} ne $param->{$k}) {
1493                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1494                     raise_param_exc({ $k => $msg }) if $verify;
1495                     die "$msg\n";
1496                 }
1497             } else {
1498                 $rule->{$k} = $param->{$k};
1499             }
1500         }
1501         push @$rules, $rule;
1502     }
1503
1504     return $rules;
1505 };
1506
1507 my $rule_env_iface_lookup = {
1508     'ct' => 1,
1509     'vm' => 1,
1510     'group' => 0,
1511     'cluster' => 1,
1512     'host' => 1,
1513 };
1514
1515 sub verify_rule {
1516     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1517
1518     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1519
1520     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1521     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1522
1523     my $errors = $rule->{errors} || {};
1524
1525     my $error_count = 0;
1526
1527     my $add_error = sub {
1528         my ($param, $msg)  = @_;
1529         chomp $msg;
1530         raise_param_exc({ $param => $msg }) if !$noerr;
1531         $error_count++;
1532         $errors->{$param} = $msg if !$errors->{$param};
1533     };
1534
1535     my $ipversion;
1536     my $set_ip_version = sub {
1537         my $vers = shift;
1538         if ($vers) {
1539             die "detected mixed ipv4/ipv6 adresses in rule\n"
1540                 if $ipversion && ($vers != $ipversion);
1541             $ipversion = $vers;
1542         }
1543     };
1544
1545     my $check_ipset_or_alias_property = sub {
1546         my ($name, $expected_ipversion) = @_;
1547
1548         if (my $value = $rule->{$name}) {
1549             if ($value =~ m/^\+/) {
1550                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1551                     &$add_error($name, "no such ipset '$1'")
1552                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1553
1554                 } else {
1555                     &$add_error($name, "invalid ipset name '$value'");
1556                 }
1557             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1558                 my $alias = lc($value);
1559                 &$add_error($name, "no such alias '$value'")
1560                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1561                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1562                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1563
1564                 &$set_ip_version($e->{ipversion});
1565             }
1566         }
1567     };
1568
1569     my $type = $rule->{type};
1570     my $action = $rule->{action};
1571
1572     &$add_error('type', "missing property") if !$type;
1573     &$add_error('action', "missing property") if !$action;
1574
1575     if ($type) {
1576         if ($type eq  'in' || $type eq 'out') {
1577             &$add_error('action', "unknown action '$action'")
1578                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1579         } elsif ($type eq 'group') {
1580             &$add_error('type', "security groups not allowed")
1581                 if !$allow_groups;
1582             &$add_error('action', "invalid characters in security group name")
1583                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1584         } else {
1585             &$add_error('type', "unknown rule type '$type'");
1586         }
1587     }
1588
1589     if ($rule->{iface}) {
1590         &$add_error('type', "parameter -i not allowed for this rule type")
1591             if !$allow_iface;
1592         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1593         &$add_error('iface', $@) if $@;
1594         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1595             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1596                 if $rule->{iface} !~  m/^net(\d+)$/;
1597         }
1598     }
1599
1600     if ($rule->{macro}) {
1601         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1602             $rule->{macro} = $preferred_name;
1603         } else {
1604             &$add_error('macro', "unknown macro '$rule->{macro}'");
1605         }
1606     }
1607
1608     if ($rule->{proto}) {
1609         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1610         &$add_error('proto', $@) if $@;
1611         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1612         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1613     }
1614
1615     if ($rule->{dport}) {
1616         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1617         &$add_error('dport', $@) if $@;
1618         my $proto = $rule->{proto};
1619         &$add_error('proto', "missing property - 'dport' requires this property")
1620             if !$proto;
1621         &$add_error('dport', "protocol '$proto' does not support ports")
1622             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1623                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1624     }
1625
1626     if ($rule->{sport}) {
1627         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1628         &$add_error('sport', $@) if $@;
1629         my $proto = $rule->{proto};
1630         &$add_error('proto', "missing property - 'sport' requires this property")
1631             if !$proto;
1632         &$add_error('sport', "protocol '$proto' does not support ports")
1633             if !$PROTOCOLS_WITH_PORTS->{$proto};
1634     }
1635
1636     if ($rule->{source}) {
1637         eval {
1638             my $source_ipversion = parse_address_list($rule->{source});
1639             &$set_ip_version($source_ipversion);
1640         };
1641         &$add_error('source', $@) if $@;
1642         &$check_ipset_or_alias_property('source', $ipversion);
1643     }
1644
1645     if ($rule->{dest}) {
1646         eval {
1647             my $dest_ipversion = parse_address_list($rule->{dest});
1648             &$set_ip_version($dest_ipversion);
1649         };
1650         &$add_error('dest', $@) if $@;
1651         &$check_ipset_or_alias_property('dest', $ipversion);
1652     }
1653
1654     $rule->{ipversion} = $ipversion if $ipversion;
1655
1656     if ($rule->{macro} && !$error_count) {
1657         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1658         if (my $err = $@) {
1659             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1660                 my $eh = $err->{errors};
1661                 foreach my $p (keys %$eh) {
1662                     &$add_error($p, $eh->{$p});
1663                 }
1664             } else {
1665                 &$add_error('macro', "$err");
1666             }
1667         }
1668     }
1669
1670     $rule->{errors} = $errors if $error_count;
1671
1672     return $rule;
1673 }
1674
1675 sub copy_rule_data {
1676     my ($rule, $param) = @_;
1677
1678     foreach my $k (keys %$rule_properties) {
1679         if (defined(my $v = $param->{$k})) {
1680             if ($v eq '' || $v eq '-') {
1681                 delete $rule->{$k};
1682             } else {
1683                 $rule->{$k} = $v;
1684             }
1685         }
1686     }
1687
1688     return $rule;
1689 }
1690
1691 sub rules_modify_permissions {
1692     my ($rule_env) = @_;
1693
1694     if ($rule_env eq 'host') {
1695         return {
1696             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1697         };
1698     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1699         return {
1700             check => ['perm', '/', [ 'Sys.Modify' ]],
1701         };
1702     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1703         return {
1704             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1705         }
1706     }
1707
1708     return undef;
1709 }
1710
1711 sub rules_audit_permissions {
1712     my ($rule_env) = @_;
1713
1714     if ($rule_env eq 'host') {
1715         return {
1716             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1717         };
1718     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1719         return {
1720             check => ['perm', '/', [ 'Sys.Audit' ]],
1721         };
1722     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1723         return {
1724             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1725         }
1726     }
1727
1728     return undef;
1729 }
1730
1731 # core functions
1732 my $bridge_firewall_enabled = 0;
1733
1734 sub enable_bridge_firewall {
1735
1736     return if $bridge_firewall_enabled; # only once
1737
1738     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1739     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1740
1741     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1742     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1743
1744     $bridge_firewall_enabled = 1;
1745 }
1746
1747 sub iptables_restore_cmdlist {
1748     my ($cmdlist) = @_;
1749
1750     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1751 }
1752
1753 sub ip6tables_restore_cmdlist {
1754     my ($cmdlist) = @_;
1755
1756     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1757 }
1758
1759 sub ipset_restore_cmdlist {
1760     my ($cmdlist) = @_;
1761
1762     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1763 }
1764
1765 sub ebtables_restore_cmdlist {
1766     my ($cmdlist) = @_;
1767
1768     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1769 }
1770
1771 sub iptables_get_chains {
1772     my ($iptablescmd) = @_;
1773
1774     $iptablescmd = "iptables" if !$iptablescmd;
1775
1776     my $res = {};
1777
1778     # check what chains we want to track
1779     my $is_pvefw_chain = sub {
1780         my $name = shift;
1781
1782         return 1 if $name =~ m/^PVEFW-\S+$/;
1783
1784         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1785
1786         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1787
1788         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1789         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1790
1791         return undef;
1792     };
1793
1794     my $table = '';
1795
1796     my $hooks = {};
1797
1798     my $parser = sub {
1799         my $line = shift;
1800
1801         return if $line =~ m/^#/;
1802         return if $line =~ m/^\s*$/;
1803
1804         if ($line =~ m/^\*(\S+)$/) {
1805             $table = $1;
1806             return;
1807         }
1808
1809         return if $table ne 'filter';
1810
1811         if ($line =~ m/^:(\S+)\s/) {
1812             my $chain = $1;
1813             return if !&$is_pvefw_chain($chain);
1814             $res->{$chain} = "unknown";
1815         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1816             my ($chain, $sig) = ($1, $2);
1817             return if !&$is_pvefw_chain($chain);
1818             $res->{$chain} = $sig;
1819         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1820             $hooks->{$1} = 1;
1821         } else {
1822             # simply ignore the rest
1823             return;
1824         }
1825     };
1826
1827     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1828
1829     return wantarray ? ($res, $hooks) : $res;
1830 }
1831
1832 sub iptables_chain_digest {
1833     my ($rules) = @_;
1834     my $digest = Digest::SHA->new('sha1');
1835     foreach my $rule (@$rules) { # order is important
1836         $digest->add($rule);
1837     }
1838     return $digest->b64digest;
1839 }
1840
1841 sub ipset_chain_digest {
1842     my ($rules) = @_;
1843
1844     my $digest = Digest::SHA->new('sha1');
1845     foreach my $rule (sort @$rules) { # note: sorted
1846         $digest->add($rule);
1847     }
1848     return $digest->b64digest;
1849 }
1850
1851 sub ipset_get_chains {
1852
1853     my $res = {};
1854     my $chains = {};
1855
1856     my $parser = sub {
1857         my $line = shift;
1858
1859         return if $line =~ m/^#/;
1860         return if $line =~ m/^\s*$/;
1861         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1862             my $chain = $1;
1863             $line =~ s/\s+$//; # delete trailing white space
1864             push @{$chains->{$chain}}, $line;
1865         } else {
1866             # simply ignore the rest
1867             return;
1868         }
1869     };
1870
1871     run_command("/sbin/ipset save", outfunc => $parser);
1872
1873     # compute digest for each chain
1874     foreach my $chain (keys %$chains) {
1875         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1876     }
1877
1878     return $res;
1879 }
1880
1881 sub ebtables_get_chains {
1882
1883     my $res = {};
1884     my $chains = {};
1885     my $parser = sub {
1886         my $line = shift;
1887         return if $line =~ m/^#/;
1888         return if $line =~ m/^\s*$/;
1889         if ($line =~ m/^:(\S+)\s\S+$/) {
1890             # Make sure we know chains exist even if they're empty.
1891             $chains->{$1} //= [];
1892         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1893             my $chain = $1;
1894             $line =~ s/\s+$//;
1895             push @{$chains->{$chain}}, $line;
1896         } else {
1897             # simply ignore the rest
1898             return;
1899         }
1900     };
1901
1902     run_command("/sbin/ebtables-save", outfunc => $parser);
1903     # compute digest for each chain and store rules as well
1904     foreach my $chain (keys %$chains) {
1905         $res->{$chain}->{rules} = $chains->{$chain};
1906         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1907     }
1908     return $res;
1909 }
1910
1911 # substitude action of rule according to action hash
1912 sub rule_substitude_action {
1913     my ($rule, $actions) = @_;
1914
1915     if (my $action = $rule->{action}) {
1916         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1917     }
1918 }
1919
1920 # generate a src or dst match
1921 # $dir(ection) is either d or s
1922 sub ipt_gen_src_or_dst_match {
1923     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1924
1925     my $srcdst;
1926     if ($dir eq 's') {
1927         $srcdst = "src";
1928     } elsif ($dir eq 'd') {
1929         $srcdst = "dst";
1930     } else {
1931         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1932     }
1933
1934     my $match;
1935     if ($adr =~ m/^\+/) {
1936         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1937             my $name = $1;
1938             my $ipset_chain;
1939             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1940                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1941             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1942                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1943             } else {
1944                 die "no such ipset '$name'\n";
1945             }
1946             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1947         } else {
1948             die "invalid security group name '$adr'\n";
1949         }
1950     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1951         my $alias = lc($adr);
1952         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1953         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1954         die "no such alias '$adr'\n" if !$e;
1955         $match = "-${dir} $e->{cidr}";
1956     } elsif ($adr =~ m/\-/){
1957         $match = "-m iprange --${srcdst}-range $adr";
1958     } else {
1959         $match = "-${dir} $adr";
1960     }
1961
1962     return $match;
1963 }
1964
1965 # convert a %rule to an array of iptables commands
1966 sub ipt_rule_to_cmds {
1967     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1968
1969     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1970
1971     my @match = ();
1972
1973     if (defined $rule->{match}) {
1974         push @match, $rule->{match};
1975     } else {
1976         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1977         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1978
1979         if ($rule->{source}) {
1980             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1981         }
1982         if ($rule->{dest}) {
1983             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1984         }
1985
1986         if (my $proto = $rule->{proto}) {
1987             push @match, "-p $proto";
1988
1989             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1990             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1991
1992             my $add_dport = sub {
1993                 return if !$rule->{dport};
1994
1995                 if ($proto eq 'icmp') {
1996                     # Note: we use dport to store --icmp-type
1997                     die "unknown icmp-type '$rule->{dport}'\n"
1998                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1999                     push @match, "-m icmp --icmp-type $rule->{dport}";
2000                 } elsif ($proto eq 'icmpv6') {
2001                     # Note: we use dport to store --icmpv6-type
2002                     die "unknown icmpv6-type '$rule->{dport}'\n"
2003                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2004                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2005                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2006                     die "protocol $proto does not have ports\n";
2007                 } elsif ($multidport) {
2008                     push @match, "--match multiport", "--dports $rule->{dport}";
2009                 } else {
2010                     push @match, "--dport $rule->{dport}";
2011                 }
2012             };
2013
2014             my $add_sport = sub {
2015                 return if !$rule->{sport};
2016
2017                 die "protocol $proto does not have ports\n"
2018                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2019                 if ($multisport) {
2020                     push @match, "--match multiport", "--sports $rule->{sport}";
2021                 } else {
2022                     push @match, "--sport $rule->{sport}";
2023                 }
2024             };
2025
2026             # order matters - single port before multiport!
2027             $add_dport->() if $multisport;
2028             $add_sport->();
2029             $add_dport->() if !$multisport;
2030         } elsif ($rule->{dport} || $rule->{sport}) {
2031             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2032             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2033         }
2034
2035         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2036     }
2037     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2038
2039     my $targetstr;
2040     if (defined $rule->{target}) {
2041         $targetstr = $rule->{target};
2042     } else {
2043         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2044         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2045         $targetstr = ($goto) ? "-g $action" : "-j $action";
2046     }
2047
2048     my @iptcmds;
2049     my $log = $rule->{log};
2050     if (defined($log) && $log ne 'nolog') {
2051         my $loglevel = $log_level_hash->{$log};
2052         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2053         push @iptcmds, "-A $chain $matchstr $logaction";
2054     }
2055     push @iptcmds, "-A $chain $matchstr $targetstr";
2056     return @iptcmds;
2057 }
2058
2059 sub ruleset_generate_rule {
2060     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2061
2062     my $rules;
2063
2064     if ($rule->{macro}) {
2065         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2066     } else {
2067         $rules = [ $rule ];
2068     }
2069
2070     # update all or nothing
2071     my @ipt_rule_cmds;
2072     foreach my $r (@$rules) {
2073         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2074     }
2075     foreach my $c (@ipt_rule_cmds) {
2076         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2077     }
2078 }
2079
2080 sub ruleset_create_chain {
2081     my ($ruleset, $chain) = @_;
2082
2083     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2084     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2085
2086     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2087
2088     $ruleset->{$chain} = [];
2089 }
2090
2091 sub ruleset_chain_exist {
2092     my ($ruleset, $chain) = @_;
2093
2094     return $ruleset->{$chain} ? 1 : undef;
2095 }
2096
2097 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2098 sub ruleset_add_ipt_cmd {
2099    my ($ruleset, $chain, $iptcmd) = @_;
2100
2101    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2102
2103    push @{$ruleset->{$chain}}, $iptcmd;
2104 }
2105
2106 sub ruleset_addrule {
2107     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2108
2109     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2110
2111     if ($log) {
2112         my $loglevel = $log_level_hash->{$log};
2113         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2114         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2115     }
2116     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2117     $match .= ' ' if length($match);
2118     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2119 }
2120
2121 sub ruleset_insertrule {
2122    my ($ruleset, $chain, $match, $action, $log) = @_;
2123
2124    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2125
2126    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2127 }
2128
2129 sub get_log_rule_base {
2130     my ($chain, $vmid, $msg, $loglevel) = @_;
2131
2132     $vmid = 0 if !defined($vmid);
2133     $msg = "" if !defined($msg);
2134
2135     my $rlimit = '';
2136     if (defined($global_log_ratelimit)) {
2137         $rlimit = "-m limit $global_log_ratelimit ";
2138     }
2139
2140     # Note: we use special format for prefix to pass further
2141     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2142     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2143 }
2144
2145 sub ruleset_add_chain_policy {
2146     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2147
2148     if ($policy eq 'ACCEPT') {
2149
2150         my $rule = { action => 'ACCEPT' };
2151         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2152         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2153
2154     } elsif ($policy eq 'DROP') {
2155
2156         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2157
2158         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2159     } elsif ($policy eq 'REJECT') {
2160         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2161
2162         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2163     } else {
2164         # should not happen
2165         die "internal error: unknown policy '$policy'";
2166     }
2167 }
2168
2169 sub ruleset_chain_add_ndp {
2170     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2171     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2172
2173     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2174     if ($direction ne 'OUT' || $options->{radv}) {
2175         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2176     }
2177     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2178     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2179 }
2180
2181 sub ruleset_chain_add_conn_filters {
2182     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2183
2184     if (!$allow_invalid) {
2185         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2186     }
2187     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2188 }
2189
2190 sub ruleset_chain_add_input_filters {
2191     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2192
2193     if ($cluster_conf->{ipset}->{blacklist}){
2194         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2195             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2196             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2197         }
2198         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2199         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2200     }
2201
2202     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2203         if ($ipversion == 4) {
2204             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2205         }
2206     }
2207
2208     if ($options->{tcpflags}) {
2209         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2210     }
2211 }
2212
2213 sub ruleset_create_vm_chain {
2214     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2215
2216     ruleset_create_chain($ruleset, $chain);
2217     my $accept = generate_nfqueue($options);
2218
2219     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2220         if ($ipversion == 4) {
2221             if ($direction eq 'OUT') {
2222                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2223                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2224                                         proto => 'udp', sport => 68, dport => 67 });
2225             } else {
2226                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2227                                       { action => 'ACCEPT',
2228                                         proto => 'udp', sport => 67, dport => 68 });
2229             }
2230         } elsif ($ipversion == 6) {
2231             if ($direction eq 'OUT') {
2232                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2233                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2234                                         proto => 'udp', sport => 546, dport => 547 });
2235             } else {
2236                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2237                                       { action => 'ACCEPT',
2238                                         proto => 'udp', sport => 547, dport => 546 });
2239             }
2240         }
2241
2242     }
2243
2244     if ($direction eq 'OUT') {
2245         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2246             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2247         }
2248         if ($ipversion == 6 && !$options->{radv}) {
2249             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2250         }
2251         if ($ipfilter_ipset) {
2252             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2253         }
2254         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2255     }
2256
2257     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2258     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2259 }
2260
2261 sub ruleset_add_group_rule {
2262     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2263
2264     my $group = $rule->{action};
2265     my $group_chain = "GROUP-$group-$direction";
2266     if(!ruleset_chain_exist($ruleset, $group_chain)){
2267         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2268     }
2269
2270     if ($direction eq 'OUT' && $rule->{iface_out}) {
2271         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2272     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2273         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2274     } else {
2275         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2276     }
2277
2278     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2279 }
2280
2281 sub ruleset_generate_vm_rules {
2282     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2283
2284     my $lc_direction = lc($direction);
2285
2286     my $in_accept = generate_nfqueue($options);
2287
2288     foreach my $rule (@$rules) {
2289         next if $rule->{iface} && $rule->{iface} ne $netid;
2290         next if !$rule->{enable} || $rule->{errors};
2291         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2292
2293         if ($rule->{type} eq 'group') {
2294             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2295                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2296         } else {
2297             next if $rule->{type} ne $lc_direction;
2298             eval {
2299                 $rule->{logmsg} = "$rule->{action}: ";
2300                 if ($direction eq 'OUT') {
2301                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2302                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2303                 } else {
2304                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2305                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2306                 }
2307             };
2308             warn $@ if $@;
2309         }
2310     }
2311 }
2312
2313 sub generate_nfqueue {
2314     my ($options) = @_;
2315
2316     if ($options->{ips}) {
2317         my $action = "NFQUEUE";
2318         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2319             if (defined($3) && defined($1)) {
2320                 $action .= " --queue-balance $1:$3";
2321             } elsif (defined($1)) {
2322                 $action .= " --queue-num $1";
2323             }
2324         }
2325         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2326         return $action;
2327     } else {
2328         return "ACCEPT";
2329     }
2330 }
2331
2332 sub ruleset_generate_vm_ipsrules {
2333     my ($ruleset, $options, $direction, $iface) = @_;
2334
2335     if ($options->{ips} && $direction eq 'IN') {
2336         my $nfqueue = generate_nfqueue($options);
2337
2338         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2339             ruleset_create_chain($ruleset, "PVEFW-IPS");
2340         }
2341
2342         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2343     }
2344 }
2345
2346 sub generate_tap_rules_direction {
2347     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2348
2349     my $lc_direction = lc($direction);
2350
2351     my $rules = $vmfw_conf->{rules};
2352
2353     my $options = $vmfw_conf->{options};
2354     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2355
2356     my $tapchain = "$iface-$direction";
2357
2358     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2359     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2360         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2361
2362     # create chain with mac and ip filter
2363     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2364
2365     if ($options->{enable}) {
2366         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2367
2368         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2369
2370         # implement policy
2371         my $policy;
2372
2373         if ($direction eq 'OUT') {
2374             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2375         } else {
2376             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2377         }
2378
2379         my $accept = generate_nfqueue($options);
2380         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2381         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2382     } else {
2383         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2384         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2385     }
2386
2387     # plug the tap chain to bridge chain
2388     if ($direction eq 'IN') {
2389         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2390                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2391     } else {
2392         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2393                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2394     }
2395 }
2396
2397 sub enable_host_firewall {
2398     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2399
2400     my $options = $hostfw_conf->{options};
2401     my $cluster_options = $cluster_conf->{options};
2402     my $rules = $hostfw_conf->{rules};
2403     my $cluster_rules = $cluster_conf->{rules};
2404
2405     # host inbound firewall
2406     my $chain = "PVEFW-HOST-IN";
2407     ruleset_create_chain($ruleset, $chain);
2408
2409     my $loglevel = get_option_log_level($options, "log_level_in");
2410
2411     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2412
2413     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2414     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2415     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2416
2417     # we use RETURN because we need to check also tap rules
2418     my $accept_action = 'RETURN';
2419
2420     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2421
2422     # add host rules first, so that cluster wide rules can be overwritten
2423     foreach my $rule (@$rules, @$cluster_rules) {
2424         next if !$rule->{enable} || $rule->{errors};
2425         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2426
2427         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2428
2429         eval {
2430             if ($rule->{type} eq 'group') {
2431                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2432             } elsif ($rule->{type} eq 'in') {
2433                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2434                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2435             }
2436         };
2437         warn $@ if $@;
2438         delete $rule->{iface_in};
2439     }
2440
2441     # allow standard traffic for management ipset (includes cluster network)
2442     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2443     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2444     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2445     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2446     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2447     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2448
2449     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2450     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2451
2452     # corosync
2453     if ($localnet && ($ipversion == $localnet_ver)) {
2454         my $corosync_rule = "-p udp --dport 5404:5405";
2455         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2456         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2457     }
2458
2459     # implement input policy
2460     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2461     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2462
2463     # host outbound firewall
2464     $chain = "PVEFW-HOST-OUT";
2465     ruleset_create_chain($ruleset, $chain);
2466
2467     $loglevel = get_option_log_level($options, "log_level_out");
2468
2469     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2470
2471     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2472
2473     # we use RETURN because we may want to check other thigs later
2474     $accept_action = 'RETURN';
2475     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2476
2477     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2478
2479     # add host rules first, so that cluster wide rules can be overwritten
2480     foreach my $rule (@$rules, @$cluster_rules) {
2481         next if !$rule->{enable} || $rule->{errors};
2482         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2483
2484         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2485         eval {
2486             $rule->{logmsg} = "$rule->{action}: ";
2487             if ($rule->{type} eq 'group') {
2488                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2489             } elsif ($rule->{type} eq 'out') {
2490                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2491                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2492             }
2493         };
2494         warn $@ if $@;
2495         delete $rule->{iface_out};
2496     }
2497
2498     # allow standard traffic on cluster network
2499     if ($localnet && ($ipversion == $localnet_ver)) {
2500         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2501         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2502         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2503         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2504
2505         my $corosync_rule = "-p udp --dport 5404:5405";
2506         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2507         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2508     }
2509
2510     # implement output policy
2511     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2512     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2513
2514     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2515     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2516 }
2517
2518 sub generate_group_rules {
2519     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2520
2521     my $rules = $cluster_conf->{groups}->{$group};
2522
2523     if (!$rules) {
2524         warn "no such security group '$group'\n";
2525         $rules = []; # create empty chain
2526     }
2527
2528     my $chain = "GROUP-${group}-IN";
2529
2530     ruleset_create_chain($ruleset, $chain);
2531     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2532
2533     foreach my $rule (@$rules) {
2534         next if $rule->{type} ne 'in';
2535         next if !$rule->{enable} || $rule->{errors};
2536         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2537         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2538         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2539     }
2540
2541     $chain = "GROUP-${group}-OUT";
2542
2543     ruleset_create_chain($ruleset, $chain);
2544     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2545
2546     foreach my $rule (@$rules) {
2547         next if $rule->{type} ne 'out';
2548         next if !$rule->{enable} || $rule->{errors};
2549         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2550         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2551         # check also other tap rules later
2552         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2553         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2554     }
2555 }
2556
2557 my $MAX_NETS = 32;
2558 my $valid_netdev_names = {};
2559 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2560     $valid_netdev_names->{"net$i"} = 1;
2561 }
2562
2563 sub get_mark_values {
2564     my ($value, $mask) = @_;
2565     $value = hex($value) if $value =~ /^0x/;
2566     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2567     $mask = 0xffffffff if !defined($mask);
2568     return ($value, $mask);
2569 }
2570
2571 sub parse_fw_rule {
2572     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2573
2574     my $orig_line = $line;
2575
2576     my $rule = {};
2577
2578     # we can add single line comments to the end of the rule
2579     if ($line =~ s/#\s*(.*?)\s*$//) {
2580         $rule->{comment} = decode('utf8', $1);
2581     }
2582
2583     # we can disable a rule when prefixed with '|'
2584
2585     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2586
2587     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2588         die "unable to parse rule: $line\n";
2589
2590     $rule->{type} = lc($1);
2591     $rule->{action} = $2;
2592
2593     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2594         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2595             $rule->{macro} = $1;
2596             $rule->{action} = $2;
2597         }
2598     }
2599
2600     while (length($line)) {
2601         if ($line =~ s/^-i (\S+)\s*//) {
2602             $rule->{iface} = $1;
2603             next;
2604         }
2605
2606         last if $rule->{type} eq 'group';
2607
2608         if ($line =~ s/^-p (\S+)\s*//) {
2609             $rule->{proto} = $1;
2610             next;
2611         }
2612
2613         if ($line =~ s/^-dport (\S+)\s*//) {
2614             $rule->{dport} = $1;
2615             next;
2616         }
2617
2618         if ($line =~ s/^-sport (\S+)\s*//) {
2619             $rule->{sport} = $1;
2620             next;
2621         }
2622         if ($line =~ s/^-source (\S+)\s*//) {
2623             $rule->{source} = $1;
2624             next;
2625         }
2626         if ($line =~ s/^-dest (\S+)\s*//) {
2627             $rule->{dest} = $1;
2628             next;
2629         }
2630         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2631             $rule->{log} = $1;
2632             next;
2633         }
2634
2635         last;
2636     }
2637
2638     die "unable to parse rule parameters: $line\n" if length($line);
2639
2640     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2641     if ($rule->{errors}) {
2642         # The verbose flag really means we're running from the CLI and want
2643         # output on the console - in the other case we really want such errors
2644         # to go into the syslog instead.
2645         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2646         $log->("$prefix - errors in rule parameters: $orig_line\n");
2647         foreach my $p (keys %{$rule->{errors}}) {
2648             $log->("  $p: $rule->{errors}->{$p}\n");
2649         }
2650     }
2651
2652     return $rule;
2653 }
2654
2655 sub verify_ethertype {
2656     my ($value) = @_;
2657     my $types = get_etc_ethertypes();
2658     die "unknown ethernet protocol type: $value\n"
2659         if !defined($types->{byname}->{$value}) &&
2660            !defined($types->{byid}->{$value});
2661 }
2662
2663 sub parse_vmfw_option {
2664     my ($line) = @_;
2665
2666     my ($opt, $value);
2667
2668     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2669
2670     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2671         $opt = lc($1);
2672         $value = int($2);
2673     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2674         $opt = lc($1);
2675         $value = $2 ? lc($3) : '';
2676     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2677         $opt = lc($1);
2678         $value = uc($3);
2679     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2680         $opt = lc($1);
2681         $value = $2;
2682     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2683         $opt = lc($1);
2684         $value = $2;
2685         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2686     } else {
2687         die "can't parse option '$line'\n"
2688     }
2689
2690     return ($opt, $value);
2691 }
2692
2693 sub parse_hostfw_option {
2694     my ($line) = @_;
2695
2696     my ($opt, $value);
2697
2698     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2699
2700     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2701         $opt = lc($1);
2702         $value = int($2);
2703     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2704         $opt = lc($1);
2705         $value = $2 ? lc($3) : '';
2706     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2707         $opt = lc($1);
2708         $value = int($2);
2709     } else {
2710         die "can't parse option '$line'\n"
2711     }
2712
2713     return ($opt, $value);
2714 }
2715
2716 sub parse_clusterfw_option {
2717     my ($line) = @_;
2718
2719     my ($opt, $value);
2720
2721     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2722         $opt = lc($1);
2723         $value = int($2);
2724         if (($value > 1) && ((time() - $value) > 60)) {
2725             $value = 0
2726         }
2727     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2728         $opt = lc($1);
2729         $value = int($2);
2730     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2731         $opt = lc($1);
2732         $value = uc($3);
2733     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2734         $opt = lc($1);
2735         $value = $2;
2736     } else {
2737         die "can't parse option '$line'\n"
2738     }
2739
2740     return ($opt, $value);
2741 }
2742
2743 sub resolve_alias {
2744     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2745
2746     my $alias = lc($cidr);
2747     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2748     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2749
2750     die "no such alias '$cidr'\n" if !$e;;
2751
2752     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2753 }
2754
2755 sub parse_ip_or_cidr {
2756     my ($cidr) = @_;
2757
2758     my $ipversion;
2759
2760     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2761         $cidr =~ s|/128$||;
2762         $ipversion = 6;
2763     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2764         $cidr =~ s|/32$||;
2765         $ipversion = 4;
2766     } else {
2767         die "value does not look like a valid IP address or CIDR network\n";
2768     }
2769
2770     return wantarray ? ($cidr, $ipversion) : $cidr;
2771 }
2772
2773 sub parse_alias {
2774     my ($line) = @_;
2775
2776     # we can add single line comments to the end of the line
2777     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2778
2779     if ($line =~ m/^(\S+)\s(\S+)$/) {
2780         my ($name, $cidr) = ($1, $2);
2781         my $ipversion;
2782
2783         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2784
2785         my $data = {
2786             name => $name,
2787             cidr => $cidr,
2788             ipversion => $ipversion,
2789         };
2790         $data->{comment} = $comment  if $comment;
2791         return $data;
2792     }
2793
2794     return undef;
2795 }
2796
2797 sub generic_fw_config_parser {
2798     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2799
2800     my $section;
2801     my $group;
2802
2803     my $res = $empty_conf;
2804
2805     my $raw;
2806     if ($filename =~ m!^/etc/pve/(.*)$!) {
2807         $raw = PVE::Cluster::get_config($1);
2808     } else {
2809         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2810     }
2811     return {} if !$raw;
2812
2813     my $linenr = 0;
2814     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2815         my $line = $1;
2816         $linenr++;
2817         next if $line =~ m/^#/;
2818         next if $line =~ m/^\s*$/;
2819         chomp $line;
2820
2821         my $prefix = "$filename (line $linenr)";
2822
2823         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2824             $section = 'options';
2825             next;
2826         }
2827
2828         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2829             $section = 'aliases';
2830             next;
2831         }
2832
2833         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2834             $section = 'groups';
2835             $group = lc($1);
2836             my $comment = $2;
2837             eval {
2838                 die "security group name too long\n" if length($group) > $max_group_name_length;
2839                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2840             };
2841             if (my $err = $@) {
2842                 ($section, $group, $comment) = undef;
2843                 warn "$prefix: $err";
2844                 next;
2845             }
2846
2847             $res->{$section}->{$group} = [];
2848             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2849                 if $comment;
2850             next;
2851         }
2852
2853         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2854             $section = 'rules';
2855             next;
2856         }
2857
2858         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2859             $section = 'ipset';
2860             $group = lc($1);
2861             my $comment = $2;
2862             eval {
2863                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2864                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2865             };
2866             if (my $err = $@) {
2867                 ($section, $group, $comment) = undef;
2868                 warn "$prefix: $err";
2869                 next;
2870             }
2871
2872             $res->{$section}->{$group} = [];
2873             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2874                 if $comment;
2875             next;
2876         }
2877
2878         if (!$section) {
2879             warn "$prefix: skip line - no section\n";
2880             next;
2881         }
2882
2883         if ($section eq 'options') {
2884             eval {
2885                 my ($opt, $value);
2886                 if ($rule_env eq 'cluster') {
2887                     ($opt, $value) = parse_clusterfw_option($line);
2888                 } elsif ($rule_env eq 'host') {
2889                     ($opt, $value) = parse_hostfw_option($line);
2890                 } else {
2891                     ($opt, $value) = parse_vmfw_option($line);
2892                 }
2893                 $res->{options}->{$opt} = $value;
2894             };
2895             warn "$prefix: $@" if $@;
2896         } elsif ($section eq 'aliases') {
2897             eval {
2898                 my $data = parse_alias($line);
2899                 $res->{aliases}->{lc($data->{name})} = $data;
2900             };
2901             warn "$prefix: $@" if $@;
2902         } elsif ($section eq 'rules') {
2903             my $rule;
2904             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2905             if (my $err = $@) {
2906                 warn "$prefix: $err";
2907                 next;
2908             }
2909             push @{$res->{$section}}, $rule;
2910         } elsif ($section eq 'groups') {
2911             my $rule;
2912             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2913             if (my $err = $@) {
2914                 warn "$prefix: $err";
2915                 next;
2916             }
2917             push @{$res->{$section}->{$group}}, $rule;
2918         } elsif ($section eq 'ipset') {
2919             # we can add single line comments to the end of the rule
2920             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2921
2922             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2923             my $nomatch = $1;
2924             my $cidr = $2;
2925             my $errors;
2926
2927             if ($nomatch && !$feature_ipset_nomatch) {
2928                 $errors->{nomatch} = "nomatch not supported by kernel";
2929             }
2930
2931             eval {
2932                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2933                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2934                 } else {
2935                     $cidr = parse_ip_or_cidr($cidr);
2936                 }
2937             };
2938             if (my $err = $@) {
2939                 chomp $err;
2940                 $errors->{cidr} = $err;
2941             }
2942
2943             if ($cidr =~ m!/0+$!) {
2944                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2945             }
2946
2947             my $entry = { cidr => $cidr };
2948             $entry->{nomatch} = 1 if $nomatch;
2949             $entry->{comment} = $comment if $comment;
2950             $entry->{errors} =  $errors if $errors;
2951
2952             if ($verbose && $errors) {
2953                 warn "$prefix - errors in ipset '$group': $line\n";
2954                 foreach my $p (keys %{$errors}) {
2955                     warn "  $p: $errors->{$p}\n";
2956                 }
2957             }
2958
2959             push @{$res->{$section}->{$group}}, $entry;
2960         } else {
2961             warn "$prefix: skip line - unknown section\n";
2962             next;
2963         }
2964     }
2965
2966     return $res;
2967 }
2968
2969 sub run_locked {
2970     my ($code, @param) = @_;
2971
2972     my $timeout = 10;
2973
2974     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2975
2976     die $@ if $@;
2977
2978     return $res;
2979 }
2980
2981 sub read_local_vm_config {
2982
2983     my $qemu = {};
2984     my $lxc = {};
2985
2986     my $vmdata = { qemu => $qemu, lxc => $lxc };
2987
2988     my $vmlist = PVE::Cluster::get_vmlist();
2989     return $vmdata if !$vmlist || !$vmlist->{ids};
2990     my $ids = $vmlist->{ids};
2991
2992     foreach my $vmid (keys %$ids) {
2993         next if !$vmid; # skip VE0
2994         my $d = $ids->{$vmid};
2995         next if !$d->{node} || $d->{node} ne $nodename;
2996         next if !$d->{type};
2997         if ($d->{type} eq 'qemu') {
2998             if ($have_qemu_server) {
2999                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3000                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3001                     $qemu->{$vmid} = $conf;
3002                 }
3003             }
3004         } elsif ($d->{type} eq 'lxc') {
3005             if ($have_lxc) {
3006                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3007                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3008                     $lxc->{$vmid} = $conf;
3009                 }
3010             }
3011         }
3012     }
3013
3014     return $vmdata;
3015 };
3016
3017 sub load_vmfw_conf {
3018     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3019
3020     $dir = $pvefw_conf_dir if !defined($dir);
3021     my $filename = "$dir/$vmid.fw";
3022
3023     my $empty_conf = {
3024         rules => [],
3025         options => {},
3026         aliases => {},
3027         ipset => {} ,
3028         ipset_comments => {},
3029     };
3030
3031     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3032     $vmfw_conf->{vmid} = $vmid;
3033
3034     return $vmfw_conf;
3035 }
3036
3037 my $format_rules = sub {
3038     my ($rules, $allow_iface) = @_;
3039
3040     my $raw = '';
3041
3042     foreach my $rule (@$rules) {
3043         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3044             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3045             $raw .= uc($rule->{type});
3046             if ($rule->{macro}) {
3047                 $raw .= " $rule->{macro}($rule->{action})";
3048             } else {
3049                 $raw .= " " . $rule->{action};
3050             }
3051             if ($allow_iface && $rule->{iface}) {
3052                 $raw .= " -i $rule->{iface}";
3053             }
3054
3055             if ($rule->{type} ne  'group')  {
3056                 $raw .= " -source $rule->{source}" if $rule->{source};
3057                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3058                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3059                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3060                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3061                 $raw .= " -log $rule->{log}" if $rule->{log};
3062             }
3063
3064             $raw .= " # " . encode('utf8', $rule->{comment})
3065                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3066             $raw .= "\n";
3067         } else {
3068             die "unknown rule type '$rule->{type}'";
3069         }
3070     }
3071
3072     return $raw;
3073 };
3074
3075 my $format_options = sub {
3076     my ($options) = @_;
3077
3078     my $raw = '';
3079
3080     $raw .= "[OPTIONS]\n\n";
3081     foreach my $opt (keys %$options) {
3082         $raw .= "$opt: $options->{$opt}\n";
3083     }
3084     $raw .= "\n";
3085
3086     return $raw;
3087 };
3088
3089 my $format_aliases = sub {
3090     my ($aliases) = @_;
3091
3092     my $raw = '';
3093
3094     $raw .= "[ALIASES]\n\n";
3095     foreach my $k (keys %$aliases) {
3096         my $e = $aliases->{$k};
3097         $raw .= "$e->{name} $e->{cidr}";
3098         $raw .= " # " . encode('utf8', $e->{comment})
3099             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3100         $raw .= "\n";
3101     }
3102     $raw .= "\n";
3103
3104     return $raw;
3105 };
3106
3107 my $format_ipsets = sub {
3108     my ($fw_conf) = @_;
3109
3110     my $raw = '';
3111
3112     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3113         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3114             my $utf8comment = encode('utf8', $comment);
3115             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3116         } else {
3117             $raw .= "[IPSET $ipset]\n\n";
3118         }
3119         my $options = $fw_conf->{ipset}->{$ipset};
3120
3121         my $nethash = {};
3122         foreach my $entry (@$options) {
3123             $nethash->{$entry->{cidr}} = $entry;
3124         }
3125
3126         foreach my $cidr (sort keys %$nethash) {
3127             my $entry = $nethash->{$cidr};
3128             my $line = $entry->{nomatch} ? '!' : '';
3129             $line .= $entry->{cidr};
3130             $line .= " # " . encode('utf8', $entry->{comment})
3131                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3132             $raw .= "$line\n";
3133         }
3134
3135         $raw .= "\n";
3136     }
3137
3138     return $raw;
3139 };
3140
3141 sub save_vmfw_conf {
3142     my ($vmid, $vmfw_conf) = @_;
3143
3144     my $raw = '';
3145
3146     my $options = $vmfw_conf->{options};
3147     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3148
3149     my $aliases = $vmfw_conf->{aliases};
3150     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3151
3152     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3153
3154     my $rules = $vmfw_conf->{rules} || [];
3155     if ($rules && scalar(@$rules)) {
3156         $raw .= "[RULES]\n\n";
3157         $raw .= &$format_rules($rules, 1);
3158         $raw .= "\n";
3159     }
3160
3161     my $filename = "$pvefw_conf_dir/$vmid.fw";
3162     if ($raw) {
3163         mkdir $pvefw_conf_dir;
3164         PVE::Tools::file_set_contents($filename, $raw);
3165     } else {
3166         unlink $filename;
3167     }
3168 }
3169
3170 sub remove_vmfw_conf {
3171     my ($vmid) = @_;
3172
3173     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3174
3175     unlink $vmfw_conffile;
3176 }
3177
3178 sub clone_vmfw_conf {
3179     my ($vmid, $newid) = @_;
3180
3181     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3182     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3183
3184     if (-f $clonevm_conffile) {
3185         unlink $clonevm_conffile;
3186     }
3187     if (-f $sourcevm_conffile) {
3188         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3189         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3190     }
3191 }
3192
3193 sub read_vm_firewall_configs {
3194     my ($cluster_conf, $vmdata, $dir) = @_;
3195
3196     my $vmfw_configs = {};
3197
3198     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3199         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3200         next if !$vmfw_conf->{options}; # skip if file does not exists
3201         $vmfw_configs->{$vmid} = $vmfw_conf;
3202     }
3203     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3204         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3205         next if !$vmfw_conf->{options}; # skip if file does not exists
3206         $vmfw_configs->{$vmid} = $vmfw_conf;
3207     }
3208
3209     return $vmfw_configs;
3210 }
3211
3212 sub get_option_log_level {
3213     my ($options, $k) = @_;
3214
3215     my $v = $options->{$k};
3216     $v = $default_log_level if !defined($v);
3217
3218     return undef if $v eq '' || $v eq 'nolog';
3219
3220     return $v if defined($log_level_hash->{$v});
3221
3222     warn "unknown log level ($k = '$v')\n";
3223
3224     return undef;
3225 }
3226
3227 sub generate_std_chains {
3228     my ($ruleset, $options, $ipversion) = @_;
3229
3230     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3231
3232     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3233     my $chain = 'PVEFW-smurflog';
3234     if ( $std_chains->{$chain} ) {
3235         foreach my $r (@{$std_chains->{$chain}}) {
3236           $r->{log} = $loglevel;
3237         }
3238     }
3239
3240     # same as shorewall logflags action.
3241     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3242     $chain = 'PVEFW-logflags';
3243     if ( $std_chains->{$chain} ) {
3244         foreach my $r (@{$std_chains->{$chain}}) {
3245           $r->{log} = $loglevel;
3246         }
3247     }
3248
3249     foreach my $chain (keys %$std_chains) {
3250         ruleset_create_chain($ruleset, $chain);
3251         foreach my $rule (@{$std_chains->{$chain}}) {
3252             if (ref($rule)) {
3253                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3254             } else {
3255                 die "rule $rule as string - should not happen";
3256             }
3257         }
3258     }
3259 }
3260
3261 sub generate_ipset_chains {
3262     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3263
3264     foreach my $ipset (keys %{$ipsets}) {
3265
3266         my $options = $ipsets->{$ipset};
3267
3268         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3269             if (my $ips = $device_ips->{$1}) {
3270                 $options = [@$options, @$ips];
3271             }
3272         }
3273
3274         # remove duplicates
3275         my $nethash = {};
3276         foreach my $entry (@$options) {
3277             next if $entry->{errors}; # skip entries with errors
3278             eval {
3279                 my ($cidr, $ver);
3280                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3281                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3282                 } else {
3283                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3284                 }
3285                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3286                 if ($ver == 6) {
3287                     # ip_compress_address takes an address only, no CIDR
3288                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3289                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3290                     $cidr .= $prefix_len if defined($prefix_len);
3291                     $cidr =~ s|/128$||;
3292                 } else {
3293                     $cidr =~ s|/32$||;
3294                 }
3295
3296                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3297             };
3298             warn $@ if $@;
3299         }
3300
3301         foreach my $ipversion (4, 6) {
3302             my $data = $nethash->{$ipversion};
3303
3304             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3305
3306             my $hashsize = scalar(@$options);
3307             if ($hashsize <= 64) {
3308                 $hashsize = 64;
3309             } else {
3310                 $hashsize = round_powerof2($hashsize);
3311             }
3312
3313             my $family = $ipversion == "6" ? "inet6" : "inet";
3314
3315             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3316
3317             foreach my $cidr (sort keys %$data) {
3318                 my $entry = $data->{$cidr};
3319
3320                 my $cmd = "add $name $cidr";
3321                 if ($entry->{nomatch}) {
3322                     if ($feature_ipset_nomatch) {
3323                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3324                     } else {
3325                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3326                     }
3327                 } else {
3328                     push @{$ipset_ruleset->{$name}}, $cmd;
3329                 }
3330             }
3331         }
3332     }
3333 }
3334
3335 sub round_powerof2 {
3336     my ($int) = @_;
3337
3338     $int--;
3339     $int |= $int >> $_ foreach (1,2,4,8,16);
3340     return ++$int;
3341 }
3342
3343 my $set_global_log_ratelimit = sub {
3344     my $cluster_opts = shift;
3345
3346     $global_log_ratelimit = '--limit 1/sec';
3347     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3348         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3349         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3350
3351         if ($limit->{enable}) {
3352             if (my $rate = $limit->{rate}) {
3353                 $global_log_ratelimit = "--limit $rate";
3354             }
3355             if (my $burst = $limit->{burst}) {
3356                 $global_log_ratelimit .= " --limit-burst $burst";
3357             }
3358         } else {
3359             $global_log_ratelimit = undef;
3360         }
3361     }
3362 };
3363
3364 sub load_clusterfw_conf {
3365     my ($filename) = @_;
3366
3367     $filename = $clusterfw_conf_filename if !defined($filename);
3368     my $empty_conf = {
3369         rules => [],
3370         options => {},
3371         aliases => {},
3372         groups => {},
3373         group_comments => {},
3374         ipset => {} ,
3375         ipset_comments => {},
3376     };
3377
3378     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3379     $set_global_log_ratelimit->($cluster_conf->{options});
3380
3381     return $cluster_conf;
3382 }
3383
3384 sub save_clusterfw_conf {
3385     my ($cluster_conf) = @_;
3386
3387     my $raw = '';
3388
3389     my $options = $cluster_conf->{options};
3390     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3391
3392     my $aliases = $cluster_conf->{aliases};
3393     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3394
3395     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3396
3397     my $rules = $cluster_conf->{rules};
3398     if ($rules && scalar(@$rules)) {
3399         $raw .= "[RULES]\n\n";
3400         $raw .= &$format_rules($rules, 1);
3401         $raw .= "\n";
3402     }
3403
3404     if ($cluster_conf->{groups}) {
3405         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3406             my $rules = $cluster_conf->{groups}->{$group};
3407             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3408                 my $utf8comment = encode('utf8', $comment);
3409                 $raw .= "[group $group] # $utf8comment\n\n";
3410             } else {
3411                 $raw .= "[group $group]\n\n";
3412             }
3413
3414             $raw .= &$format_rules($rules, 0);
3415             $raw .= "\n";
3416         }
3417     }
3418
3419     if ($raw) {
3420         mkdir $pvefw_conf_dir;
3421         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3422     } else {
3423         unlink $clusterfw_conf_filename;
3424     }
3425 }
3426
3427 sub load_hostfw_conf {
3428     my ($cluster_conf, $filename) = @_;
3429
3430     $filename = $hostfw_conf_filename if !defined($filename);
3431
3432     my $empty_conf = { rules => [], options => {}};
3433     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3434 }
3435
3436 sub save_hostfw_conf {
3437     my ($hostfw_conf) = @_;
3438
3439     my $raw = '';
3440
3441     my $options = $hostfw_conf->{options};
3442     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3443
3444     my $rules = $hostfw_conf->{rules};
3445     if ($rules && scalar(@$rules)) {
3446         $raw .= "[RULES]\n\n";
3447         $raw .= &$format_rules($rules, 1);
3448         $raw .= "\n";
3449     }
3450
3451     if ($raw) {
3452         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3453     } else {
3454         unlink $hostfw_conf_filename;
3455     }
3456 }
3457
3458 sub compile {
3459     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
3460
3461     my $vmfw_configs;
3462
3463     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3464     $pve_std_chains = dclone($pve_std_chains_conf);
3465
3466     if ($vmdata) { # test mode
3467         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3468         my $filename = "$testdir/cluster.fw";
3469         $cluster_conf = load_clusterfw_conf($filename);
3470
3471         $filename = "$testdir/host.fw";
3472         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3473
3474         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3475     } else { # normal operation
3476         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3477
3478         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3479
3480         $vmdata = read_local_vm_config();
3481         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3482     }
3483
3484     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3485
3486     my $localnet;
3487     if ($cluster_conf->{aliases}->{local_network}) {
3488         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3489     } else {
3490         my $localnet_ver;
3491         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3492
3493         $cluster_conf->{aliases}->{local_network} = {
3494             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3495     }
3496
3497     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3498
3499     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4);
3500     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6);
3501     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3502     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3503
3504     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3505 }
3506
3507 sub compile_iptables_filter {
3508     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion) = @_;
3509
3510     my $ruleset = {};
3511
3512     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3513     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3514
3515     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3516
3517     my $hostfw_options = $hostfw_conf->{options} || {};
3518
3519     # fixme: what log level should we use here?
3520     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3521
3522     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3523     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3524
3525     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3526     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3527
3528     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3529
3530     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3531     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3532
3533     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3534
3535     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3536
3537     if ($hostfw_enable) {
3538         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3539         warn $@ if $@; # just to be sure - should not happen
3540     }
3541
3542     # generate firewall rules for QEMU VMs
3543     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3544         eval {
3545             my $conf = $vmdata->{qemu}->{$vmid};
3546             my $vmfw_conf = $vmfw_configs->{$vmid};
3547             return if !$vmfw_conf;
3548
3549             foreach my $netid (sort keys %$conf) {
3550                 next if $netid !~ m/^net(\d+)$/;
3551                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3552                 next if !$net->{firewall};
3553                 my $iface = "tap${vmid}i$1";
3554
3555                 my $macaddr = $net->{macaddr};
3556                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3557                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3558                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3559                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3560             }
3561         };
3562         warn $@ if $@; # just to be sure - should not happen
3563     }
3564
3565     # generate firewall rules for LXC containers
3566     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3567         eval {
3568             my $conf = $vmdata->{lxc}->{$vmid};
3569             my $vmfw_conf = $vmfw_configs->{$vmid};
3570             return if !$vmfw_conf;
3571
3572             if ($vmfw_conf->{options}->{enable}) {
3573                 foreach my $netid (sort keys %$conf) {
3574                     next if $netid !~ m/^net(\d+)$/;
3575                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3576                     next if !$net->{firewall};
3577                     my $iface = "veth${vmid}i$1";
3578                     my $macaddr = $net->{hwaddr};
3579                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3580                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3581                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3582                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3583                 }
3584             }
3585         };
3586         warn $@ if $@; # just to be sure - should not happen
3587     }
3588
3589     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3590         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3591     }
3592
3593     return $ruleset;
3594 }
3595
3596 sub mac_to_linklocal {
3597     my ($macaddr) = @_;
3598     my @parts = split(/:/, $macaddr);
3599     # The standard link local address uses the fe80::/64 prefix with the
3600     # modified EUI-64 identifier derived from the MAC address by flipping the
3601     # universal/local bit and inserting FF:FE in the middle.
3602     # See RFC 4291.
3603     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3604     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3605     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3606 }
3607
3608 sub compile_ipsets {
3609     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3610
3611     my $localnet;
3612     if ($cluster_conf->{aliases}->{local_network}) {
3613         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3614     } else {
3615         my $localnet_ver;
3616         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3617
3618         $cluster_conf->{aliases}->{local_network} = {
3619             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3620     }
3621
3622     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3623
3624
3625     my $ipset_ruleset = {};
3626
3627     # generate ipsets for QEMU VMs
3628     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3629         eval {
3630             my $conf = $vmdata->{qemu}->{$vmid};
3631             my $vmfw_conf = $vmfw_configs->{$vmid};
3632             return if !$vmfw_conf;
3633
3634             # When the 'ipfilter' option is enabled every device for which there
3635             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3636             # ipset.
3637             # The reason is that ipfilter ipsets are always filled with standard
3638             # IPv6 link-local filters.
3639             my $ipsets = $vmfw_conf->{ipset};
3640             my $implicit_sets = {};
3641
3642             my $device_ips = {};
3643             foreach my $netid (keys %$conf) {
3644                 next if $netid !~ m/^net(\d+)$/;
3645                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3646                 next if !$net->{firewall};
3647
3648                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3649                     $implicit_sets->{"ipfilter-$netid"} = [];
3650                 }
3651
3652                 my $macaddr = $net->{macaddr};
3653                 my $linklocal = mac_to_linklocal($macaddr);
3654                 $device_ips->{$netid} = [
3655                     { cidr => $linklocal },
3656                     { cidr => 'fe80::/10', nomatch => 1 }
3657                 ];
3658             }
3659
3660             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3661             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3662         };
3663         warn $@ if $@; # just to be sure - should not happen
3664     }
3665
3666     # generate firewall rules for LXC containers
3667     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3668         eval {
3669             my $conf = $vmdata->{lxc}->{$vmid};
3670             my $vmfw_conf = $vmfw_configs->{$vmid};
3671             return if !$vmfw_conf;
3672
3673             # When the 'ipfilter' option is enabled every device for which there
3674             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3675             # ipset.
3676             # The reason is that ipfilter ipsets are always filled with standard
3677             # IPv6 link-local filters, as well as the IP addresses configured
3678             # for the container.
3679             my $ipsets = $vmfw_conf->{ipset};
3680             my $implicit_sets = {};
3681
3682             my $device_ips = {};
3683             foreach my $netid (keys %$conf) {
3684                 next if $netid !~ m/^net(\d+)$/;
3685                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3686                 next if !$net->{firewall};
3687
3688                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3689                     $implicit_sets->{"ipfilter-$netid"} = [];
3690                 }
3691
3692                 my $macaddr = $net->{hwaddr};
3693                 my $linklocal = mac_to_linklocal($macaddr);
3694                 my $set = $device_ips->{$netid} = [
3695                     { cidr => $linklocal },
3696                     { cidr => 'fe80::/10', nomatch => 1 }
3697                 ];
3698                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3699                     push @$set, { cidr => $1 };
3700                 }
3701                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3702                     push @$set, { cidr => $1 };
3703                 }
3704             }
3705
3706             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3707             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3708         };
3709         warn $@ if $@; # just to be sure - should not happen
3710     }
3711
3712     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3713
3714     return $ipset_ruleset;
3715 }
3716
3717 sub compile_ebtables_filter {
3718     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3719
3720     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3721         return {};
3722     }
3723
3724     my $ruleset = {};
3725
3726     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3727
3728     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3729     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3730     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3731     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3732     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3733
3734     # generate firewall rules for QEMU VMs
3735     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3736         eval {
3737             my $conf = $vmdata->{qemu}->{$vmid};
3738             my $vmfw_conf = $vmfw_configs->{$vmid};
3739             return if !$vmfw_conf;
3740             my $ipsets = $vmfw_conf->{ipset};
3741
3742             foreach my $netid (sort keys %$conf) {
3743                 next if $netid !~ m/^net(\d+)$/;
3744                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3745                 next if !$net->{firewall};
3746                 my $iface = "tap${vmid}i$1";
3747                 my $macaddr = $net->{macaddr};
3748                 my $arpfilter = [];
3749                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3750                     foreach my $ipaddr (@$ipset) {
3751                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3752                         next if !$ip || ($version && $version != 4);
3753                         push(@$arpfilter, $ip);
3754                     }
3755                 }
3756                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3757             }
3758         };
3759         warn $@ if $@; # just to be sure - should not happen
3760     }
3761
3762     # generate firewall rules for LXC containers
3763     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3764         eval {
3765             my $conf = $vmdata->{lxc}->{$vmid};
3766
3767             my $vmfw_conf = $vmfw_configs->{$vmid};
3768             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3769             my $ipsets = $vmfw_conf->{ipset};
3770
3771             foreach my $netid (sort keys %$conf) {
3772                 next if $netid !~ m/^net(\d+)$/;
3773                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3774                 next if !$net->{firewall};
3775                 my $iface = "veth${vmid}i$1";
3776                 my $macaddr = $net->{hwaddr};
3777                 my $arpfilter = [];
3778                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3779                     foreach my $ipaddr (@$ipset) {
3780                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3781                         next if !$ip || ($version && $version != 4);
3782                         push(@$arpfilter, $ip);
3783                     }
3784                 }
3785                 if (my $ip = $net->{ip} && $vmfw_conf->{options}->{ipfilter}) {
3786                     # ebtables changes this to a .0/MASK network but we just
3787                     # want the address here, no network - see #2193
3788                     $ip =~ s|/(\d+)$||;
3789                     push @$arpfilter, $ip;
3790                 }
3791                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3792             }
3793         };
3794         warn $@ if $@; # just to be sure - should not happen
3795     }
3796
3797     return $ruleset;
3798 }
3799
3800 sub generate_tap_layer2filter {
3801     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3802     my $options = $vmfw_conf->{options};
3803
3804     my $tapchain = $iface."-OUT";
3805
3806     # ebtables remove zeros from mac pairs
3807     $macaddr =~ s/0([0-9a-f])/$1/ig;
3808     $macaddr = lc($macaddr);
3809
3810     ruleset_create_chain($ruleset, $tapchain);
3811
3812     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3813             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3814     }
3815
3816     if (@$arpfilter){
3817         my $arpchain = $tapchain."-ARP";
3818         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3819         ruleset_create_chain($ruleset, $arpchain);
3820
3821         foreach my $ip (@{$arpfilter}) {
3822             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3823         }
3824         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3825     }
3826
3827     if (defined($options->{layer2_protocols})){
3828         my $protochain = $tapchain."-PROTO";
3829         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3830         ruleset_create_chain($ruleset, $protochain);
3831
3832         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3833             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3834         }
3835         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3836     }
3837
3838     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3839
3840     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3841 }
3842
3843 # the parameter $change_only_regex changes two things if defined:
3844 # * all chains not matching it will be left intact
3845 # * both the $active_chains hash and the returned status_hash have different
3846 #   structure (they contain a key named 'rules').
3847 sub get_ruleset_status {
3848     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3849
3850     my $statushash = {};
3851
3852     foreach my $chain (sort keys %$ruleset) {
3853         my $rules = $ruleset->{$chain};
3854         my $sig = &$digest_fn($rules);
3855         my $oldsig;
3856
3857         $statushash->{$chain}->{sig} = $sig;
3858         if (defined($change_only_regex)) {
3859             $oldsig = $active_chains->{$chain}->{sig};
3860             $statushash->{$chain}->{rules} = $rules;
3861         } else {
3862             $oldsig = $active_chains->{$chain};
3863         }
3864         if (!defined($oldsig)) {
3865             $statushash->{$chain}->{action} = 'create';
3866         } else {
3867             if ($oldsig eq $sig) {
3868                 $statushash->{$chain}->{action} = 'exists';
3869             } else {
3870                 $statushash->{$chain}->{action} = 'update';
3871             }
3872         }
3873         if ($verbose) {
3874             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3875             foreach my $cmd (@{$rules}) {
3876                 print "\t$cmd\n";
3877             }
3878         }
3879     }
3880
3881     foreach my $chain (sort keys %$active_chains) {
3882         next if defined($ruleset->{$chain});
3883         my $action = 'delete';
3884         my $sig = $active_chains->{$chain};
3885         if (defined($change_only_regex)) {
3886             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3887             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3888             $sig = $sig->{sig};
3889         }
3890         $statushash->{$chain}->{action} = $action;
3891         $statushash->{$chain}->{sig} = $sig;
3892         print "$action $chain ($sig)\n" if $verbose;
3893     }
3894
3895     return $statushash;
3896 }
3897
3898 sub print_sig_rule {
3899     my ($chain, $sig) = @_;
3900
3901     # We just use this to store a SHA1 checksum used to detect changes
3902     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3903 }
3904
3905 sub get_ruleset_cmdlist {
3906     my ($ruleset, $iptablescmd) = @_;
3907
3908     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3909
3910     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3911     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3912
3913     # create missing chains first
3914     foreach my $chain (sort keys %$ruleset) {
3915         my $stat = $statushash->{$chain};
3916         die "internal error" if !$stat;
3917         next if $stat->{action} ne 'create';
3918
3919         $cmdlist .= ":$chain - [0:0]\n";
3920     }
3921
3922     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3923         my $chain = "PVEFW-$h";
3924         if ($ruleset->{$chain} && !$hooks->{$h}) {
3925             $cmdlist .= "-A $h -j $chain\n";
3926         }
3927     }
3928
3929     foreach my $chain (sort keys %$ruleset) {
3930         my $stat = $statushash->{$chain};
3931         die "internal error" if !$stat;
3932
3933         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3934             $cmdlist .= "-F $chain\n";
3935             foreach my $cmd (@{$ruleset->{$chain}}) {
3936                 $cmdlist .= "$cmd\n";
3937             }
3938             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3939         } elsif ($stat->{action} eq 'delete') {
3940             die "internal error"; # this should not happen
3941         } elsif ($stat->{action} eq 'exists') {
3942             # do nothing
3943         } else {
3944             die "internal error - unknown status '$stat->{action}'";
3945         }
3946     }
3947
3948     foreach my $chain (keys %$statushash) {
3949         next if $statushash->{$chain}->{action} ne 'delete';
3950         $cmdlist .= "-F $chain\n";
3951     }
3952     foreach my $chain (keys %$statushash) {
3953         next if $statushash->{$chain}->{action} ne 'delete';
3954         next if $chain eq 'PVEFW-INPUT';
3955         next if $chain eq 'PVEFW-OUTPUT';
3956         next if $chain eq 'PVEFW-FORWARD';
3957         $cmdlist .= "-X $chain\n";
3958     }
3959
3960     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3961
3962     $cmdlist .= "COMMIT\n";
3963
3964     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3965 }
3966
3967 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3968
3969 sub get_ebtables_cmdlist {
3970     my ($ruleset) = @_;
3971
3972     my $changes = 0;
3973     my $cmdlist = "*filter\n";
3974
3975     my $active_chains = ebtables_get_chains();
3976     my $statushash = get_ruleset_status($ruleset, $active_chains,
3977                                         \&iptables_chain_digest,
3978                                         $pve_ebtables_chainname_regex);
3979
3980     # create chains first and make sure PVE rules are evaluated if active
3981     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3982     my $pve_include = 0;
3983     foreach my $chain (sort keys %$statushash) {
3984         next if ($statushash->{$chain}->{action} eq 'delete');
3985         $cmdlist .= ":$chain ACCEPT\n";
3986         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3987     }
3988
3989     foreach my $chain (sort keys %$statushash) {
3990         my $stat = $statushash->{$chain};
3991         next if ($stat->{action} eq 'delete');
3992         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3993
3994         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3995             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3996                 next if ! $pve_include;
3997                 $pve_include = 0;
3998             }
3999             $cmdlist .= "$cmd\n";
4000         }
4001     }
4002     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4003
4004     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4005 }
4006
4007 sub get_ipset_cmdlist {
4008     my ($ruleset) = @_;
4009
4010     my $cmdlist = "";
4011
4012     my $delete_cmdlist = "";
4013
4014     my $active_chains = ipset_get_chains();
4015     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4016
4017     # remove stale _swap chains
4018     foreach my $chain (keys %$active_chains) {
4019         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4020             $cmdlist .= "destroy $chain\n";
4021         }
4022     }
4023
4024     foreach my $chain (keys %$ruleset) {
4025         my $stat = $statushash->{$chain};
4026         die "internal error" if !$stat;
4027
4028         if ($stat->{action} eq 'create') {
4029             foreach my $cmd (@{$ruleset->{$chain}}) {
4030                 $cmdlist .= "$cmd\n";
4031             }
4032         }
4033     }
4034
4035     foreach my $chain (keys %$ruleset) {
4036         my $stat = $statushash->{$chain};
4037         die "internal error" if !$stat;
4038
4039         if ($stat->{action} eq 'update') {
4040             my $chain_swap = $chain."_swap";
4041
4042             foreach my $cmd (@{$ruleset->{$chain}}) {
4043                 $cmd =~ s/$chain/$chain_swap/;
4044                 $cmdlist .= "$cmd\n";
4045             }
4046             $cmdlist .= "swap $chain_swap $chain\n";
4047             $cmdlist .= "flush $chain_swap\n";
4048             $cmdlist .= "destroy $chain_swap\n";
4049         }
4050     }
4051
4052      # the remove unused chains
4053     foreach my $chain (keys %$statushash) {
4054         next if $statushash->{$chain}->{action} ne 'delete';
4055
4056         $delete_cmdlist .= "flush $chain\n";
4057         $delete_cmdlist .= "destroy $chain\n";
4058     }
4059
4060     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4061
4062     return ($cmdlist, $delete_cmdlist, $changes);
4063 }
4064
4065 sub apply_ruleset {
4066     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4067
4068     enable_bridge_firewall();
4069
4070     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4071         get_ipset_cmdlist($ipset_ruleset);
4072
4073     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4074     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4075     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4076
4077     if ($verbose) {
4078         if ($ipset_changes) {
4079             print "ipset changes:\n";
4080             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4081             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4082         }
4083
4084         if ($changes) {
4085             print "iptables changes:\n";
4086             print $cmdlist;
4087         }
4088
4089         if ($changesv6) {
4090             print "ip6tables changes:\n";
4091             print $cmdlistv6;
4092         }
4093
4094         if ($ebtables_changes) {
4095             print "ebtables changes:\n";
4096             print $ebtables_cmdlist;
4097         }
4098     }
4099
4100     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4101     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4102
4103     ipset_restore_cmdlist($ipset_create_cmdlist);
4104
4105     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4106     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4107
4108     iptables_restore_cmdlist($cmdlist);
4109
4110     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4111     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4112
4113     ip6tables_restore_cmdlist($cmdlistv6);
4114
4115     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4116     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4117
4118     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4119
4120     ebtables_restore_cmdlist($ebtables_cmdlist);
4121
4122     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4123     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4124
4125     # test: re-read status and check if everything is up to date
4126     my $active_chains = iptables_get_chains();
4127     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4128
4129     my $errors;
4130     foreach my $chain (sort keys %$ruleset) {
4131         my $stat = $statushash->{$chain};
4132         if ($stat->{action} ne 'exists') {
4133             warn "unable to update chain '$chain'\n";
4134             $errors = 1;
4135         }
4136     }
4137
4138     my $active_chainsv6 = iptables_get_chains("ip6tables");
4139     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
4140
4141     foreach my $chain (sort keys %$rulesetv6) {
4142         my $stat = $statushashv6->{$chain};
4143         if ($stat->{action} ne 'exists') {
4144             warn "unable to update chain '$chain'\n";
4145             $errors = 1;
4146         }
4147     }
4148
4149     my $active_ebtables_chains = ebtables_get_chains();
4150     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4151                                 $active_ebtables_chains, \&iptables_chain_digest,
4152                                 $pve_ebtables_chainname_regex);
4153
4154     foreach my $chain (sort keys %$ebtables_ruleset) {
4155         my $stat = $ebtables_statushash->{$chain};
4156         if ($stat->{action} ne 'exists') {
4157             warn "ebtables : unable to update chain '$chain'\n";
4158             $errors = 1;
4159         }
4160     }
4161
4162     die "unable to apply firewall changes\n" if $errors;
4163
4164     update_nf_conntrack_max($hostfw_conf);
4165
4166     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4167
4168     update_nf_conntrack_logging($hostfw_conf);
4169 }
4170
4171 sub update_nf_conntrack_max {
4172     my ($hostfw_conf) = @_;
4173
4174     my $max = 65536; # reasonable default
4175
4176     my $options = $hostfw_conf->{options} || {};
4177
4178     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4179         $max = $options->{nf_conntrack_max};
4180         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4181     }
4182
4183     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4184     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4185
4186     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4187
4188     if ($current != $max) {
4189         my $hashsize = int($max/4);
4190         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4191         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4192     }
4193 }
4194
4195 sub update_nf_conntrack_tcp_timeout_established {
4196     my ($hostfw_conf) = @_;
4197
4198     my $options = $hostfw_conf->{options} || {};
4199
4200     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4201
4202     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4203 }
4204
4205 my $log_nf_conntrack_enabled = undef;
4206 sub update_nf_conntrack_logging {
4207     my ($hostfw_conf) = @_;
4208
4209     my $options = $hostfw_conf->{options} || {};
4210     my $value = $options->{log_nf_conntrack} || 0;
4211     if (!defined($log_nf_conntrack_enabled)
4212         || $value != $log_nf_conntrack_enabled)
4213     {
4214         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4215         PVE::Tools::file_set_contents($tmpfile, $value);
4216
4217         PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4218         $log_nf_conntrack_enabled = $value;
4219     }
4220 }
4221
4222 sub remove_pvefw_chains {
4223
4224     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4225     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4226     PVE::Firewall::remove_pvefw_chains_ipset();
4227
4228 }
4229
4230 sub remove_pvefw_chains_iptables {
4231     my ($iptablescmd) = @_;
4232
4233     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4234     my $cmdlist = "*filter\n";
4235
4236     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4237         if ($hooks->{$h}) {
4238             $cmdlist .= "-D $h -j PVEFW-$h\n";
4239         }
4240     }
4241
4242     foreach my $chain (keys %$chash) {
4243         $cmdlist .= "-F $chain\n";
4244     }
4245
4246     foreach my $chain (keys %$chash) {
4247         $cmdlist .= "-X $chain\n";
4248     }
4249     $cmdlist .= "COMMIT\n";
4250
4251     if($iptablescmd eq "ip6tables") {
4252         ip6tables_restore_cmdlist($cmdlist);
4253     } else {
4254         iptables_restore_cmdlist($cmdlist);
4255     }
4256 }
4257
4258 sub remove_pvefw_chains_ipset {
4259
4260     my $ipset_chains = ipset_get_chains();
4261
4262     my $cmdlist = "";
4263
4264     foreach my $chain (keys %$ipset_chains) {
4265         $cmdlist .= "flush $chain\n";
4266         $cmdlist .= "destroy $chain\n";
4267     }
4268
4269     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4270 }
4271
4272 sub init {
4273     my $cluster_conf = load_clusterfw_conf();
4274     my $cluster_options = $cluster_conf->{options};
4275     my $enable = $cluster_options->{enable};
4276
4277     return if !$enable;
4278
4279     # load required modules here
4280 }
4281
4282 sub update {
4283     my $code = sub {
4284
4285         my $cluster_conf = load_clusterfw_conf();
4286         my $cluster_options = $cluster_conf->{options};
4287
4288         if (!$cluster_options->{enable}) {
4289             PVE::Firewall::remove_pvefw_chains();
4290             return;
4291         }
4292
4293         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4294
4295         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4296
4297         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4298     };
4299
4300     run_locked($code);
4301 }
4302
4303 1;