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_INET AF_INET6 inet_ntop inet_pton);
  14 use Storable qw(dclone);
  15
  16 use PVE::Cluster;
  17 use PVE::Corosync;
  18 use PVE::Exception qw(raise raise_param_exc);
  19 use PVE::INotify;
  20 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  21 use PVE::Network;
  22 use PVE::ProcFSTools;
  23 use PVE::SafeSyslog;
  24 use PVE::Tools qw($IPV4RE $IPV6RE);
  25 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  26
  27 my $pvefw_conf_dir = "/etc/pve/firewall";
  28 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  29
  30 # dynamically include PVE::QemuServer and PVE::LXC
  31 # to avoid dependency problems
  32 my $have_qemu_server;
  33 eval {
  34     require PVE::QemuServer;
  35     require PVE::QemuConfig;
  36     $have_qemu_server = 1;
  37 };
  38
  39 my $have_lxc;
  40 eval {
  41     require PVE::LXC;
  42     $have_lxc = 1;
  43 };
  44
  45 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  46
  47 mkdir $pve_fw_status_dir; # make sure this exists
  48
  49 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  52
  53 my $max_alias_name_length = 64;
  54 my $max_ipset_name_length = 64;
  55 my $max_group_name_length = 18;
  56
  57 my $PROTOCOLS_WITH_PORTS = {
  58     udp => 1,     17 => 1,
  59     udplite => 1, 136 => 1,
  60     tcp => 1,     6 => 1,
  61     dccp => 1,    33 => 1,
  62     sctp => 1,    132 => 1,
  63 };
  64
  65 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  66 sub pve_verify_ip_or_cidr {
  67     my ($cidr, $noerr) = @_;
  68
  69     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  70         return $cidr if Net::IP->new($cidr);
  71         return undef if $noerr;
  72         die Net::IP::Error() . "\n";
  73     }
  74     return undef if $noerr;
  75     die "value does not look like a valid IP address or CIDR network\n";
  76 }
  77
  78 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  79 sub pve_verify_ip_or_cidr_or_alias {
  80     my ($cidr, $noerr) = @_;
  81
  82     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  83
  84     return pve_verify_ip_or_cidr($cidr, $noerr);
  85 }
  86
  87 PVE::JSONSchema::register_standard_option('ipset-name', {
  88     description => "IP set name.",
  89     type => 'string',
  90     pattern => $ipset_name_pattern,
  91     minLength => 2,
  92     maxLength => $max_ipset_name_length,
  93 });
  94
  95 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  96     description => "Alias name.",
  97     type => 'string',
  98     pattern => $ip_alias_pattern,
  99     minLength => 2,
 100     maxLength => $max_alias_name_length,
 101 });
 102
 103 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 104     description => "Log level.",
 105     type => 'string',
 106     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 107     optional => 1,
 108 });
 109
 110 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 111     description => "Security Group name.",
 112     type => 'string',
 113     pattern => $security_group_name_pattern,
 114     minLength => 2,
 115     maxLength => $max_group_name_length,
 116 });
 117
 118 my $feature_ipset_nomatch = 0;
 119 eval  {
 120     my (undef, undef, $release) = POSIX::uname();
 121     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 122         my ($major, $minor) = ($1, $2);
 123         $feature_ipset_nomatch = 1 if ($major > 3) ||
 124             ($major == 3 && $minor >= 7);
 125     }
 126
 127 };
 128
 129 my $nodename = PVE::INotify::nodename();
 130 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
 131
 132 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 133
 134 my $default_log_level = 'nolog'; # avoid logs by default
 135 my $global_log_ratelimit = '--limit 1/sec';
 136
 137 my $log_level_hash = {
 138     debug => 7,
 139     info => 6,
 140     notice => 5,
 141     warning => 4,
 142     err => 3,
 143     crit => 2,
 144     alert => 1,
 145     emerg => 0,
 146 };
 147
 148 my $verbose = 0;
 149 sub set_verbose {
 150     $verbose = shift;
 151 }
 152
 153 # %rule
 154 #
 155 # name => optional
 156 # enable => [0|1]
 157 # action =>
 158 # proto =>
 159 # sport => port[,port[,port]].. or port:port
 160 # dport => port[,port[,port]].. or port:port
 161 # log => optional, loglevel
 162 # logmsg => optional, logmsg - overwrites default
 163 # iface_in => incomin interface
 164 # iface_out => outgoing interface
 165 # match => optional, overwrites generation of match
 166 # target => optional, overwrites action
 167
 168 # we need to overwrite some macros for ipv6
 169 my $pve_ipv6fw_macros = {
 170     'Ping' => [
 171         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 172     ],
 173     'NeighborDiscovery' => [
 174         "IPv6 neighbor solicitation, neighbor and router advertisement",
 175         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 176         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 177         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 178         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 179     ],
 180     'DHCPv6' => [
 181         "DHCPv6 traffic",
 182         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 183     ],
 184     'Trcrt' => [
 185         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 186         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 187     ],
 188  };
 189
 190 # imported/converted from: /usr/share/shorewall/macro.*
 191 my $pve_fw_macros = {
 192     'Amanda' => [
 193         "Amanda Backup",
 194         { action => 'PARAM', proto => 'udp', dport => '10080' },
 195         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 196     ],
 197     'Auth' => [
 198         "Auth (identd) traffic",
 199         { action => 'PARAM', proto => 'tcp', dport => '113' },
 200     ],
 201     'BGP' => [
 202         "Border Gateway Protocol traffic",
 203         { action => 'PARAM', proto => 'tcp', dport => '179' },
 204     ],
 205     'BitTorrent' => [
 206         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 207         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 208         { action => 'PARAM', proto => 'udp', dport => '6881' },
 209     ],
 210     'BitTorrent32' => [
 211         "BitTorrent traffic for BitTorrent 3.2 and later",
 212         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 213         { action => 'PARAM', proto => 'udp', dport => '6881' },
 214     ],
 215     'Ceph' => [
 216         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 217         # Legacy port for protocol v1
 218         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 219         # New port for protocol v2
 220         { action => 'PARAM', proto => 'tcp', dport => '3300' },
 221         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 222     ],
 223     'CVS' => [
 224         "Concurrent Versions System pserver traffic",
 225         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 226     ],
 227     'Citrix' => [
 228         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 229         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 230         { action => 'PARAM', proto => 'udp', dport => '1604' },
 231         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 232     ],
 233     'DAAP' => [
 234         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 235         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 236         { action => 'PARAM', proto => 'udp', dport => '3689' },
 237     ],
 238     'DCC' => [
 239         "Distributed Checksum Clearinghouse spam filtering mechanism",
 240         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 241     ],
 242     'DHCPfwd' => [
 243         "Forwarded DHCP traffic",
 244         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 245     ],
 246     'DNS' => [
 247         "Domain Name System traffic (upd and tcp)",
 248         { action => 'PARAM', proto => 'udp', dport => '53' },
 249         { action => 'PARAM', proto => 'tcp', dport => '53' },
 250     ],
 251     'Distcc' => [
 252         "Distributed Compiler service",
 253         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 254     ],
 255     'FTP' => [
 256         "File Transfer Protocol",
 257         { action => 'PARAM', proto => 'tcp', dport => '21' },
 258     ],
 259     'Finger' => [
 260         "Finger protocol (RFC 742)",
 261         { action => 'PARAM', proto => 'tcp', dport => '79' },
 262     ],
 263     'GNUnet' => [
 264         "GNUnet secure peer-to-peer networking traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 266         { action => 'PARAM', proto => 'udp', dport => '2086' },
 267         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 268         { action => 'PARAM', proto => 'udp', dport => '1080' },
 269     ],
 270     'GRE' => [
 271         "Generic Routing Encapsulation tunneling protocol",
 272         { action => 'PARAM', proto => '47' },
 273     ],
 274     'Git' => [
 275         "Git distributed revision control traffic",
 276         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 277     ],
 278     'HKP' => [
 279         "OpenPGP HTTP keyserver protocol traffic",
 280         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 281     ],
 282     'HTTP' => [
 283         "Hypertext Transfer Protocol (WWW)",
 284         { action => 'PARAM', proto => 'tcp', dport => '80' },
 285     ],
 286     'HTTPS' => [
 287         "Hypertext Transfer Protocol (WWW) over SSL",
 288         { action => 'PARAM', proto => 'tcp', dport => '443' },
 289     ],
 290     'ICPV2' => [
 291         "Internet Cache Protocol V2 (Squid) traffic",
 292         { action => 'PARAM', proto => 'udp', dport => '3130' },
 293     ],
 294     'ICQ' => [
 295         "AOL Instant Messenger traffic",
 296         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 297     ],
 298     'IMAP' => [
 299         "Internet Message Access Protocol",
 300         { action => 'PARAM', proto => 'tcp', dport => '143' },
 301     ],
 302     'IMAPS' => [
 303         "Internet Message Access Protocol over SSL",
 304         { action => 'PARAM', proto => 'tcp', dport => '993' },
 305     ],
 306     'IPIP' => [
 307         "IPIP capsulation traffic",
 308         { action => 'PARAM', proto => '94' },
 309     ],
 310     'IPsec' => [
 311         "IPsec traffic",
 312         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 313         { action => 'PARAM', proto => '50' },
 314     ],
 315     'IPsecah' => [
 316         "IPsec authentication (AH) traffic",
 317         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 318         { action => 'PARAM', proto => '51' },
 319     ],
 320     'IPsecnat' => [
 321         "IPsec traffic and Nat-Traversal",
 322         { action => 'PARAM', proto => 'udp', dport => '500' },
 323         { action => 'PARAM', proto => 'udp', dport => '4500' },
 324         { action => 'PARAM', proto => '50' },
 325     ],
 326     'IRC' => [
 327         "Internet Relay Chat traffic",
 328         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 329     ],
 330     'Jetdirect' => [
 331         "HP Jetdirect printing",
 332         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 333     ],
 334     'L2TP' => [
 335         "Layer 2 Tunneling Protocol traffic",
 336         { action => 'PARAM', proto => 'udp', dport => '1701' },
 337     ],
 338     'LDAP' => [
 339         "Lightweight Directory Access Protocol traffic",
 340         { action => 'PARAM', proto => 'tcp', dport => '389' },
 341     ],
 342     'LDAPS' => [
 343         "Secure Lightweight Directory Access Protocol traffic",
 344         { action => 'PARAM', proto => 'tcp', dport => '636' },
 345     ],
 346     'MSNP' => [
 347         "Microsoft Notification Protocol",
 348         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 349     ],
 350     'MSSQL' => [
 351         "Microsoft SQL Server",
 352         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 353     ],
 354     'Mail' => [
 355         "Mail traffic (SMTP, SMTPS, Submission)",
 356         { action => 'PARAM', proto => 'tcp', dport => '25' },
 357         { action => 'PARAM', proto => 'tcp', dport => '465' },
 358         { action => 'PARAM', proto => 'tcp', dport => '587' },
 359     ],
 360     'MDNS' => [
 361         "Multicast DNS",
 362         { action => 'PARAM', proto => 'udp', dport => '5353' },
 363     ],
 364     'Munin' => [
 365         "Munin networked resource monitoring traffic",
 366         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 367     ],
 368     'MySQL' => [
 369         "MySQL server",
 370         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 371     ],
 372     'NNTP' => [
 373         "NNTP traffic (Usenet).",
 374         { action => 'PARAM', proto => 'tcp', dport => '119' },
 375     ],
 376     'NNTPS' => [
 377         "Encrypted NNTP traffic (Usenet)",
 378         { action => 'PARAM', proto => 'tcp', dport => '563' },
 379     ],
 380     'NTP' => [
 381         "Network Time Protocol (ntpd)",
 382         { action => 'PARAM', proto => 'udp', dport => '123' },
 383     ],
 384     'OSPF' => [
 385         "OSPF multicast traffic",
 386         { action => 'PARAM', proto => '89' },
 387     ],
 388     'OpenVPN' => [
 389         "OpenVPN traffic",
 390         { action => 'PARAM', proto => 'udp', dport => '1194' },
 391     ],
 392     'PCA' => [
 393         "Symantec PCAnywere (tm)",
 394         { action => 'PARAM', proto => 'udp', dport => '5632' },
 395         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 396     ],
 397     'POP3' => [
 398         "POP3 traffic",
 399         { action => 'PARAM', proto => 'tcp', dport => '110' },
 400     ],
 401     'POP3S' => [
 402         "Encrypted POP3 traffic",
 403         { action => 'PARAM', proto => 'tcp', dport => '995' },
 404     ],
 405     'PPtP' => [
 406         "Point-to-Point Tunneling Protocol",
 407         { action => 'PARAM', proto => '47' },
 408         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 409     ],
 410     'Ping' => [
 411         "ICMP echo request",
 412         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 413     ],
 414     'PostgreSQL' => [
 415         "PostgreSQL server",
 416         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 417     ],
 418     'Printer' => [
 419         "Line Printer protocol printing",
 420         { action => 'PARAM', proto => 'tcp', dport => '515' },
 421     ],
 422     'RDP' => [
 423         "Microsoft Remote Desktop Protocol traffic",
 424         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 425     ],
 426     'RIP' => [
 427         "Routing Information Protocol (bidirectional)",
 428         { action => 'PARAM', proto => 'udp', dport => '520' },
 429     ],
 430     'RNDC' => [
 431         "BIND remote management protocol",
 432         { action => 'PARAM', proto => 'tcp', dport => '953' },
 433     ],
 434     'Razor' => [
 435         "Razor Antispam System",
 436         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 437     ],
 438     'Rdate' => [
 439         "Remote time retrieval (rdate)",
 440         { action => 'PARAM', proto => 'tcp', dport => '37' },
 441     ],
 442     'Rsync' => [
 443         "Rsync server",
 444         { action => 'PARAM', proto => 'tcp', dport => '873' },
 445     ],
 446     'SANE' => [
 447         "SANE network scanning",
 448         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 449     ],
 450     'SMB' => [
 451         "Microsoft SMB traffic",
 452         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 453         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 454         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 455         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 456     ],
 457     'SMBswat' => [
 458         "Samba Web Administration Tool",
 459         { action => 'PARAM', proto => 'tcp', dport => '901' },
 460     ],
 461     'SMTP' => [
 462         "Simple Mail Transfer Protocol",
 463         { action => 'PARAM', proto => 'tcp', dport => '25' },
 464     ],
 465     'SMTPS' => [
 466         "Encrypted Simple Mail Transfer Protocol",
 467         { action => 'PARAM', proto => 'tcp', dport => '465' },
 468     ],
 469     'SNMP' => [
 470         "Simple Network Management Protocol",
 471         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 472         { action => 'PARAM', proto => 'tcp', dport => '161' },
 473     ],
 474     'SPAMD' => [
 475         "Spam Assassin SPAMD traffic",
 476         { action => 'PARAM', proto => 'tcp', dport => '783' },
 477     ],
 478     'SSH' => [
 479         "Secure shell traffic",
 480         { action => 'PARAM', proto => 'tcp', dport => '22' },
 481     ],
 482     'SVN' => [
 483         "Subversion server (svnserve)",
 484         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 485     ],
 486     'SixXS' => [
 487         "SixXS IPv6 Deployment and Tunnel Broker",
 488         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 489         { action => 'PARAM', proto => 'udp', dport => '3740' },
 490         { action => 'PARAM', proto => '41' },
 491         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 492     ],
 493     'Squid' => [
 494         "Squid web proxy traffic",
 495         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 496     ],
 497     'Submission' => [
 498         "Mail message submission traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '587' },
 500     ],
 501     'Syslog' => [
 502         "Syslog protocol (RFC 5424) traffic",
 503         { action => 'PARAM', proto => 'udp', dport => '514' },
 504         { action => 'PARAM', proto => 'tcp', dport => '514' },
 505     ],
 506     'TFTP' => [
 507         "Trivial File Transfer Protocol traffic",
 508         { action => 'PARAM', proto => 'udp', dport => '69' },
 509     ],
 510     'Telnet' => [
 511         "Telnet traffic",
 512         { action => 'PARAM', proto => 'tcp', dport => '23' },
 513     ],
 514     'Telnets' => [
 515         "Telnet over SSL",
 516         { action => 'PARAM', proto => 'tcp', dport => '992' },
 517     ],
 518     'Time' => [
 519         "RFC 868 Time protocol",
 520         { action => 'PARAM', proto => 'tcp', dport => '37' },
 521     ],
 522     'Trcrt' => [
 523         "Traceroute (for up to 30 hops) traffic",
 524         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 525         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 526     ],
 527     'VNC' => [
 528         "VNC traffic for VNC display's 0 - 99",
 529         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 530     ],
 531     'VNCL' => [
 532         "VNC traffic from Vncservers to Vncviewers in listen mode",
 533         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 534     ],
 535     'Web' => [
 536         "WWW traffic (HTTP and HTTPS)",
 537         { action => 'PARAM', proto => 'tcp', dport => '80' },
 538         { action => 'PARAM', proto => 'tcp', dport => '443' },
 539     ],
 540     'Webcache' => [
 541         "Web Cache/Proxy traffic (port 8080)",
 542         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 543     ],
 544     'Webmin' => [
 545         "Webmin traffic",
 546         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 547     ],
 548     'Whois' => [
 549         "Whois (nicname, RFC 3912) traffic",
 550         { action => 'PARAM', proto => 'tcp', dport => '43' },
 551     ],
 552 };
 553
 554 my $pve_fw_parsed_macros;
 555 my $pve_fw_macro_descr;
 556 my $pve_fw_macro_ipversion = {};
 557 my $pve_fw_preferred_macro_names = {};
 558
 559 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 560 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 561
 562 my $pve_std_chains = {};
 563 my $pve_std_chains_conf = {};
 564 $pve_std_chains_conf->{4} = {
 565     'PVEFW-SET-ACCEPT-MARK' => [
 566         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 567     ],
 568     'PVEFW-DropBroadcast' => [
 569         # same as shorewall 'Broadcast'
 570         # simply DROP BROADCAST/MULTICAST/ANYCAST
 571         # we can use this to reduce logging
 572         { action => 'DROP', dsttype => 'BROADCAST' },
 573         { action => 'DROP', dsttype => 'MULTICAST' },
 574         { action => 'DROP', dsttype => 'ANYCAST' },
 575         { action => 'DROP', dest => '224.0.0.0/4' },
 576     ],
 577     'PVEFW-reject' => [
 578         # same as shorewall 'reject'
 579         { action => 'DROP', dsttype => 'BROADCAST' },
 580         { action => 'DROP', source => '224.0.0.0/4' },
 581         { action => 'DROP', proto => 'icmp' },
 582         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 583         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 584         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 585         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 586     ],
 587     'PVEFW-Drop' => [
 588         # same as shorewall 'Drop', which is equal to DROP,
 589         # but REJECT/DROP some packages to reduce logging,
 590         # and ACCEPT critical ICMP types
 591         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 592         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 593         { action => 'PVEFW-DropBroadcast' },
 594         # ACCEPT critical ICMP types
 595         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 596         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 597         # Drop packets with INVALID state
 598         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 599         # Drop Microsoft SMB noise
 600         { action => 'DROP', proto => 'udp', dport => '135,445' },
 601         { action => 'DROP', proto => 'udp', dport => '137:139' },
 602         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 603         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 604         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 605         # Drop new/NotSyn traffic so that it doesn't get logged
 606         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 607         # Drop DNS replies
 608         { action => 'DROP', proto => 'udp', sport => 53 },
 609     ],
 610     'PVEFW-Reject' => [
 611         # same as shorewall 'Reject', which is equal to Reject,
 612         # but REJECT/DROP some packages to reduce logging,
 613         # and ACCEPT critical ICMP types
 614         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 615         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 616         { action => 'PVEFW-DropBroadcast' },
 617         # ACCEPT critical ICMP types
 618         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 619         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 620         # Drop packets with INVALID state
 621         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 622         # Drop Microsoft SMB noise
 623         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 624         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 625         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 626         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 627         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 628         # Drop new/NotSyn traffic so that it doesn't get logged
 629         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 630         # Drop DNS replies
 631         { action => 'DROP', proto => 'udp', sport => 53 },
 632     ],
 633     'PVEFW-tcpflags' => [
 634         # same as shorewall tcpflags action.
 635         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 636         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 637         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 638         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 639         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 640         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 641     ],
 642     'PVEFW-smurfs' => [
 643         # same as shorewall smurfs action
 644         # Filter packets for smurfs (packets with a broadcast address as the source).
 645         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 646         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 647         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 648     ],
 649     'PVEFW-smurflog' => [
 650         { action => 'DROP', logmsg => 'DROP: ' },
 651     ],
 652     'PVEFW-logflags' => [
 653         { action => 'DROP', logmsg => 'DROP: ' },
 654     ],
 655 };
 656
 657 $pve_std_chains_conf->{6} = {
 658     'PVEFW-SET-ACCEPT-MARK' => [
 659         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 660     ],
 661     'PVEFW-DropBroadcast' => [
 662         # same as shorewall 'Broadcast'
 663         # simply DROP BROADCAST/MULTICAST/ANYCAST
 664         # we can use this to reduce logging
 665         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 666         # ipv6 addrtype does not work with kernel 2.6.32
 667         #{ action => 'DROP', dsttype => 'MULTICAST' },
 668         #{ action => 'DROP', dsttype => 'ANYCAST' },
 669         { action => 'DROP', dest => 'ff00::/8' },
 670         #{ action => 'DROP', dest => '224.0.0.0/4' },
 671     ],
 672     'PVEFW-reject' => [
 673         { action => 'DROP', proto => 'icmpv6' },
 674         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 675         { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
 676         { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
 677     ],
 678     'PVEFW-Drop' => [
 679         # same as shorewall 'Drop', which is equal to DROP,
 680         # but REJECT/DROP some packages to reduce logging,
 681         # and ACCEPT critical ICMP types
 682         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 683         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 684         { action => 'PVEFW-DropBroadcast' },
 685         # ACCEPT critical ICMP types
 686         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 687         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 688         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 689         # Drop packets with INVALID state
 690         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 691         # Drop Microsoft SMB noise
 692         { action => 'DROP', proto => 'udp', dport => '135,445' },
 693         { action => 'DROP', proto => 'udp', dport => '137:139'},
 694         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 695         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 696         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 697         # Drop new/NotSyn traffic so that it doesn't get logged
 698         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 699         # Drop DNS replies
 700         { action => 'DROP', proto => 'udp', sport => 53 },
 701     ],
 702     'PVEFW-Reject' => [
 703         # same as shorewall 'Reject', which is equal to Reject,
 704         # but REJECT/DROP some packages to reduce logging,
 705         # and ACCEPT critical ICMP types
 706         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 707         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 708         { action => 'PVEFW-DropBroadcast' },
 709         # ACCEPT critical ICMP types
 710         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 711         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 712         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 713         # Drop packets with INVALID state
 714         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 715         # Drop Microsoft SMB noise
 716         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 717         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 718         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 719         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 720         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 721         # Drop new/NotSyn traffic so that it doesn't get logged
 722         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 723         # Drop DNS replies
 724         { action => 'DROP', proto => 'udp', sport => 53 },
 725     ],
 726     'PVEFW-tcpflags' => [
 727         # same as shorewall tcpflags action.
 728         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 729         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 730         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 731         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 732         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 733         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 734     ],
 735     'PVEFW-logflags' => [
 736         { action => 'DROP', logmsg => 'DROP: ' },
 737     ],
 738 };
 739
 740 # iptables -p icmp -h
 741 my $icmp_type_names = {
 742     any => 1,
 743     'echo-reply' => 1,
 744     'destination-unreachable' => 1,
 745     'network-unreachable' => 1,
 746     'host-unreachable' => 1,
 747     'protocol-unreachable' => 1,
 748     'port-unreachable' => 1,
 749     'fragmentation-needed' => 1,
 750     'source-route-failed' => 1,
 751     'network-unknown' => 1,
 752     'host-unknown' => 1,
 753     'network-prohibited' => 1,
 754     'host-prohibited' => 1,
 755     'TOS-network-unreachable' => 1,
 756     'TOS-host-unreachable' => 1,
 757     'communication-prohibited' => 1,
 758     'host-precedence-violation' => 1,
 759     'precedence-cutoff' => 1,
 760     'source-quench' => 1,
 761     'redirect' => 1,
 762     'network-redirect' => 1,
 763     'host-redirect' => 1,
 764     'TOS-network-redirect' => 1,
 765     'TOS-host-redirect' => 1,
 766     'echo-request' => 1,
 767     'router-advertisement' => 1,
 768     'router-solicitation' => 1,
 769     'time-exceeded' => 1,
 770     'ttl-zero-during-transit' => 1,
 771     'ttl-zero-during-reassembly' => 1,
 772     'parameter-problem' => 1,
 773     'ip-header-bad' => 1,
 774     'required-option-missing' => 1,
 775     'timestamp-request' => 1,
 776     'timestamp-reply' => 1,
 777     'address-mask-request' => 1,
 778     'address-mask-reply' => 1,
 779 };
 780
 781 # ip6tables -p icmpv6 -h
 782
 783 my $icmpv6_type_names = {
 784     'any' => 1,
 785     'destination-unreachable' => 1,
 786     'no-route' => 1,
 787     'communication-prohibited' => 1,
 788     'address-unreachable' => 1,
 789     'port-unreachable' => 1,
 790     'packet-too-big' => 1,
 791     'time-exceeded' => 1,
 792     'ttl-zero-during-transit' => 1,
 793     'ttl-zero-during-reassembly' => 1,
 794     'parameter-problem' => 1,
 795     'bad-header' => 1,
 796     'unknown-header-type' => 1,
 797     'unknown-option' => 1,
 798     'echo-request' => 1,
 799     'echo-reply' => 1,
 800     'router-solicitation' => 1,
 801     'router-advertisement' => 1,
 802     'neighbor-solicitation' => 1,
 803     'neighbour-solicitation' => 1,
 804     'neighbor-advertisement' => 1,
 805     'neighbour-advertisement' => 1,
 806     'redirect' => 1,
 807 };
 808
 809 sub init_firewall_macros {
 810
 811     $pve_fw_parsed_macros = {};
 812
 813     my $parse = sub {
 814         my ($k, $macro) = @_;
 815         my $lc_name = lc($k);
 816         $pve_fw_macro_ipversion->{$k} = 0;
 817         while (!ref($macro->[0])) {
 818             my $desc = shift @$macro;
 819             if ($desc eq 'ipv4only') {
 820                 $pve_fw_macro_ipversion->{$k} = 4;
 821             } elsif ($desc eq 'ipv6only') {
 822                 $pve_fw_macro_ipversion->{$k} = 6;
 823             } else {
 824                 $pve_fw_macro_descr->{$k} = $desc;
 825             }
 826         }
 827         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 828         $pve_fw_parsed_macros->{$k} = $macro;
 829     };
 830
 831     foreach my $k (keys %$pve_fw_macros) {
 832         &$parse($k, $pve_fw_macros->{$k});
 833     }
 834
 835     foreach my $k (keys %$pve_ipv6fw_macros) {
 836         next if $pve_fw_parsed_macros->{$k};
 837         &$parse($k, $pve_ipv6fw_macros->{$k});
 838         $pve_fw_macro_ipversion->{$k} = 6;
 839     }
 840 }
 841
 842 init_firewall_macros();
 843
 844 sub get_macros {
 845     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 846 }
 847
 848 my $etc_services;
 849
 850 sub get_etc_services {
 851
 852     return $etc_services if $etc_services;
 853
 854     my $filename = "/etc/services";
 855
 856     my $fh = IO::File->new($filename, O_RDONLY);
 857     if (!$fh) {
 858         warn "unable to read '$filename' - $!\n";
 859         return {};
 860     }
 861
 862     my $services = {};
 863
 864     while (my $line = <$fh>) {
 865         chomp ($line);
 866         next if $line =~m/^#/;
 867         next if ($line =~m/^\s*$/);
 868
 869         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 870             $services->{byid}->{$2}->{name} = $1;
 871             $services->{byid}->{$2}->{port} = $2;
 872             $services->{byid}->{$2}->{$3} = 1;
 873             $services->{byname}->{$1} = $services->{byid}->{$2};
 874         }
 875     }
 876
 877     close($fh);
 878
 879     $etc_services = $services;
 880
 881
 882     return $etc_services;
 883 }
 884
 885 sub parse_protocol_file {
 886     my ($filename) = @_;
 887
 888     my $fh = IO::File->new($filename, O_RDONLY);
 889     if (!$fh) {
 890         warn "unable to read '$filename' - $!\n";
 891         return {};
 892     }
 893
 894     my $protocols = {};
 895
 896     while (my $line = <$fh>) {
 897         chomp ($line);
 898         next if $line =~m/^#/;
 899         next if ($line =~m/^\s*$/);
 900
 901         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 902             $protocols->{byid}->{$2}->{name} = $1;
 903             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 904         }
 905     }
 906
 907     close($fh);
 908
 909     return $protocols;
 910 }
 911
 912 my $etc_protocols;
 913
 914 sub get_etc_protocols {
 915     return $etc_protocols if $etc_protocols;
 916
 917     my $protocols = parse_protocol_file('/etc/protocols');
 918
 919     # add special case for ICMP v6
 920     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 921     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 922
 923     $etc_protocols = $protocols;
 924
 925     return $etc_protocols;
 926 }
 927
 928 my $etc_ethertypes;
 929
 930 sub get_etc_ethertypes {
 931     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 932         if !$etc_ethertypes;
 933     return $etc_ethertypes;
 934 }
 935
 936 my $__local_network;
 937
 938 sub local_network {
 939     my ($new_value) = @_;
 940
 941     $__local_network = $new_value if defined($new_value);
 942
 943     return $__local_network if defined($__local_network);
 944
 945     eval {
 946         my $nodename = PVE::INotify::nodename();
 947
 948         my $ip = PVE::Cluster::remote_node_ip($nodename);
 949
 950         my $testip = Net::IP->new($ip);
 951
 952         my $isv6 = $testip->version == 6;
 953         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 954                            : PVE::ProcFSTools::read_proc_net_route();
 955         foreach my $entry (@$routes) {
 956             my $mask;
 957             if ($isv6) {
 958                 $mask = $entry->{prefix};
 959                 next if !$mask; # skip the default route...
 960             } else {
 961                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 962                 next if !defined($mask);
 963             }
 964             my $cidr = "$entry->{dest}/$mask";
 965             my $testnet = Net::IP->new($cidr);
 966             my $overlap = $testnet->overlaps($testip);
 967             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 968                 $overlap == $Net::IP::IP_IDENTICAL)
 969             {
 970                 $__local_network = $cidr;
 971                 return;
 972             }
 973         }
 974     };
 975     warn $@ if $@;
 976
 977     return $__local_network;
 978 }
 979
 980 # ipset names are limited to 31 characters,
 981 # and we use '-v4' or '-v6' to indicate IP versions,
 982 # and we use '_swap' suffix for atomic update,
 983 # for example PVEFW-${VMID}-${ipset_name}_swap
 984
 985 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 986
 987 sub compute_ipset_chain_name {
 988     my ($vmid, $ipset_name, $ipversion) = @_;
 989
 990     $vmid = 0 if !defined($vmid);
 991
 992     my $id = "$vmid-${ipset_name}-v$ipversion";
 993
 994     if (length($id) > $max_iptables_ipset_name_length) {
 995         $id = PVE::Tools::fnv31a_hex($id);
 996     }
 997
 998     return "PVEFW-$id";
 999 }
1000
1001 sub compute_ipfilter_ipset_name {
1002     my ($iface) = @_;
1003
1004     return "ipfilter-$iface";
1005 }
1006
1007 sub parse_address_list {
1008     my ($str) = @_;
1009
1010     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1011         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1012         return;
1013     }
1014
1015     if ($str =~ m/^${ip_alias_pattern}$/) {
1016         die "alias name too long\n" if length($str) > $max_alias_name_length;
1017         return;
1018     }
1019
1020     my $count = 0;
1021     my $iprange = 0;
1022     my $ipversion;
1023
1024     my @elements = split(/,/, $str);
1025     die "extraneous commas in list\n" if $str ne join(',', @elements);
1026     foreach my $elem (@elements) {
1027         $count++;
1028         my $ip = Net::IP->new($elem);
1029         if (!$ip) {
1030             my $err = Net::IP::Error();
1031             die "invalid IP address: $err\n";
1032         }
1033         $iprange = 1 if $elem =~ m/-/;
1034
1035         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1036
1037         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1038             if $ipversion && ($new_ipversion != $ipversion);
1039
1040         $ipversion = $new_ipversion;
1041     }
1042
1043     die "you can't use a range in a list\n" if $iprange && $count > 1;
1044
1045     return $ipversion;
1046 }
1047
1048 sub parse_port_name_number_or_range {
1049     my ($str, $dport) = @_;
1050
1051     my $services = PVE::Firewall::get_etc_services();
1052     my $count = 0;
1053     my $icmp_port = 0;
1054
1055     my @elements = split(/,/, $str);
1056     die "extraneous commas in list\n" if $str ne join(',', @elements);
1057     foreach my $item (@elements) {
1058         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1059             $count += 2;
1060             my ($port1, $port2) = ($1, $2);
1061             die "invalid port '$port1'\n" if $port1 > 65535;
1062             die "invalid port '$port2'\n" if $port2 > 65535;
1063             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1064         } elsif ($item =~ m/^([0-9]+)$/) {
1065             $count += 1;
1066             my $port = $1;
1067             die "invalid port '$port'\n" if $port > 65535;
1068         } else {
1069             if ($dport && $icmp_type_names->{$item}) {
1070                 $icmp_port = 1;
1071             } elsif ($dport && $icmpv6_type_names->{$item}) {
1072                 $icmp_port = 1;
1073             } else {
1074                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1075             }
1076         }
1077     }
1078
1079     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1080
1081     # I really don't like to use the word number here, but it's the only thing
1082     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1083     # one and not as 100...
1084     die "too many entries in port list (> 15 numbers)\n"
1085         if $count > 15;
1086
1087     return (scalar(@elements) > 1);
1088 }
1089
1090 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1091 sub pve_fw_verify_sport_spec {
1092    my ($portstr) = @_;
1093
1094    parse_port_name_number_or_range($portstr, 0);
1095
1096    return $portstr;
1097 }
1098
1099 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1100 sub pve_fw_verify_dport_spec {
1101    my ($portstr) = @_;
1102
1103    parse_port_name_number_or_range($portstr, 1);
1104
1105    return $portstr;
1106 }
1107
1108 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1109 sub pve_fw_verify_addr_spec {
1110    my ($list) = @_;
1111
1112    parse_address_list($list);
1113
1114    return $list;
1115 }
1116
1117 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1118 sub pve_fw_verify_protocol_spec {
1119    my ($proto) = @_;
1120
1121    my $protocols = get_etc_protocols();
1122
1123    die "unknown protocol '$proto'\n" if $proto &&
1124        !(defined($protocols->{byname}->{$proto}) ||
1125          defined($protocols->{byid}->{$proto}));
1126
1127    return $proto;
1128 }
1129
1130
1131 # helper function for API
1132
1133 sub copy_opject_with_digest {
1134     my ($object) = @_;
1135
1136     my $sha = Digest::SHA->new('sha1');
1137
1138     my $res = {};
1139     foreach my $k (sort keys %$object) {
1140         my $v = $object->{$k};
1141         next if !defined($v);
1142         $res->{$k} = $v;
1143         $sha->add($k, ':', $v, "\n");
1144     }
1145
1146     my $digest = $sha->hexdigest;
1147
1148     $res->{digest} = $digest;
1149
1150     return wantarray ? ($res, $digest) : $res;
1151 }
1152
1153 sub copy_list_with_digest {
1154     my ($list) = @_;
1155
1156     my $sha = Digest::SHA->new('sha1');
1157
1158     my $res = [];
1159     foreach my $entry (@$list) {
1160         my $data = {};
1161         foreach my $k (sort keys %$entry) {
1162             my $v = $entry->{$k};
1163             next if !defined($v);
1164             $data->{$k} = $v;
1165             # Note: digest ignores refs ($rule->{errors})
1166             # since Digest::SHA expects a series of bytes,
1167             #  we have to encode the value here to prevent errors when
1168             #  using utf8 characters (eg. in comments)
1169             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1170         }
1171         push @$res, $data;
1172     }
1173
1174     my $digest = $sha->hexdigest;
1175
1176     foreach my $entry (@$res) {
1177         $entry->{digest} = $digest;
1178     }
1179
1180     return wantarray ? ($res, $digest) : $res;
1181 }
1182
1183 our $cluster_option_properties = {
1184     enable => {
1185         description => "Enable or disable the firewall cluster wide.",
1186         type => 'integer',
1187         minimum => 0,
1188         optional => 1,
1189     },
1190     ebtables => {
1191         description => "Enable ebtables rules cluster wide.",
1192         type => 'boolean',
1193         default => 1,
1194         optional => 1,
1195     },
1196     policy_in => {
1197         description => "Input policy.",
1198         type => 'string',
1199         optional => 1,
1200         enum => ['ACCEPT', 'REJECT', 'DROP'],
1201     },
1202     policy_out => {
1203         description => "Output policy.",
1204         type => 'string',
1205         optional => 1,
1206         enum => ['ACCEPT', 'REJECT', 'DROP'],
1207     },
1208     log_ratelimit => {
1209         description => "Log ratelimiting settings",
1210         type => 'string', format => {
1211             enable => {
1212                 default_key => 1,
1213                 description => 'Enable or disable log rate limiting',
1214                 type => 'boolean',
1215                 default => '1',
1216             },
1217             rate => {
1218                 type => 'string',
1219                 description => 'Frequency with which the burst bucket gets refilled',
1220                 optional => 1,
1221                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1222                 format_description => 'rate',
1223                 default => '1/second',
1224             },
1225             burst => {
1226                 type => 'integer',
1227                 minimum => 0,
1228                 optional => 1,
1229                 description => 'Inital burst of packages which will get logged',
1230                 default => 5,
1231             },
1232         },
1233         optional => 1,
1234     },
1235 };
1236
1237 our $host_option_properties = {
1238     enable => {
1239         description => "Enable host firewall rules.",
1240         type => 'boolean',
1241         optional => 1,
1242     },
1243     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1244         description => "Log level for incoming traffic." }),
1245     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1246         description => "Log level for outgoing traffic." }),
1247     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1248         description => "Log level for illegal tcp flags filter." }),
1249     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1250         description => "Log level for SMURFS filter." }),
1251     nosmurfs => {
1252         description => "Enable SMURFS filter.",
1253         type => 'boolean',
1254         optional => 1,
1255     },
1256     tcpflags => {
1257         description => "Filter illegal combinations of TCP flags.",
1258         type => 'boolean',
1259         optional => 1,
1260     },
1261     nf_conntrack_max => {
1262         description => "Maximum number of tracked connections.",
1263         type => 'integer',
1264         optional => 1,
1265         minimum => 32768,
1266     },
1267     nf_conntrack_tcp_timeout_established => {
1268         description => "Conntrack established timeout.",
1269         type => 'integer',
1270         optional => 1,
1271         minimum => 7875,
1272     },
1273     ndp => {
1274         description => "Enable NDP.",
1275         type => 'boolean',
1276         optional => 1,
1277     },
1278     nf_conntrack_allow_invalid => {
1279         description => "Allow invalid packets on connection tracking.",
1280         type => 'boolean',
1281         default => 0,
1282         optional => 1,
1283     },
1284     log_nf_conntrack => {
1285         description => "Enable logging of conntrack information.",
1286         type => 'boolean',
1287         default => 0,
1288         optional => 1
1289     },
1290 };
1291
1292 our $vm_option_properties = {
1293     enable => {
1294         description => "Enable/disable firewall rules.",
1295         type => 'boolean',
1296         optional => 1,
1297     },
1298     macfilter => {
1299         description => "Enable/disable MAC address filter.",
1300         type => 'boolean',
1301         optional => 1,
1302     },
1303     dhcp => {
1304         description => "Enable DHCP.",
1305         type => 'boolean',
1306         optional => 1,
1307     },
1308     ndp => {
1309         description => "Enable NDP.",
1310         type => 'boolean',
1311         optional => 1,
1312     },
1313     radv => {
1314         description => "Allow sending Router Advertisement.",
1315         type => 'boolean',
1316         optional => 1,
1317     },
1318     ipfilter => {
1319         description => "Enable default IP filters. " .
1320            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1321            "for every interface. Such ipsets implicitly contain sane default " .
1322            "restrictions such as restricting IPv6 link local addresses to " .
1323            "the one derived from the interface's MAC address. For containers " .
1324            "the configured IP addresses will be implicitly added.",
1325         type => 'boolean',
1326         optional => 1,
1327     },
1328     policy_in => {
1329         description => "Input policy.",
1330         type => 'string',
1331         optional => 1,
1332         enum => ['ACCEPT', 'REJECT', 'DROP'],
1333     },
1334     policy_out => {
1335         description => "Output policy.",
1336         type => 'string',
1337         optional => 1,
1338         enum => ['ACCEPT', 'REJECT', 'DROP'],
1339     },
1340     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1341         description => "Log level for incoming traffic." }),
1342     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1343         description => "Log level for outgoing traffic." }),
1344
1345 };
1346
1347
1348 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1349
1350 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1351
1352 my $rule_properties = {
1353     pos => {
1354         description => "Update rule at position <pos>.",
1355         type => 'integer',
1356         minimum => 0,
1357         optional => 1,
1358     },
1359     digest => get_standard_option('pve-config-digest'),
1360     type => {
1361         description => "Rule type.",
1362         type => 'string',
1363         optional => 1,
1364         enum => ['in', 'out', 'group'],
1365     },
1366     action => {
1367         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1368         type => 'string',
1369         optional => 1,
1370         pattern => $security_group_name_pattern,
1371         maxLength => 20,
1372         minLength => 2,
1373     },
1374     macro => {
1375         description => "Use predefined standard macro.",
1376         type => 'string',
1377         optional => 1,
1378         maxLength => 128,
1379     },
1380     iface => get_standard_option('pve-iface', {
1381         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1382         optional => 1
1383     }),
1384     source => {
1385         description => "Restrict packet source address. $addr_list_descr",
1386         type => 'string', format => 'pve-fw-addr-spec',
1387         optional => 1,
1388     },
1389     dest => {
1390         description => "Restrict packet destination address. $addr_list_descr",
1391         type => 'string', format => 'pve-fw-addr-spec',
1392         optional => 1,
1393     },
1394     proto => {
1395         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1396         type => 'string', format => 'pve-fw-protocol-spec',
1397         optional => 1,
1398     },
1399     enable => {
1400         description => "Flag to enable/disable a rule.",
1401         type => 'integer',
1402         minimum => 0,
1403         optional => 1,
1404     },
1405     log => get_standard_option('pve-fw-loglevel', {
1406         description => "Log level for firewall rule.",
1407     }),
1408     sport => {
1409         description => "Restrict TCP/UDP source port. $port_descr",
1410         type => 'string', format => 'pve-fw-sport-spec',
1411         optional => 1,
1412     },
1413     dport => {
1414         description => "Restrict TCP/UDP destination port. $port_descr",
1415         type => 'string', format => 'pve-fw-dport-spec',
1416         optional => 1,
1417     },
1418     comment => {
1419         description => "Descriptive comment.",
1420         type => 'string',
1421         optional => 1,
1422     },
1423 };
1424
1425 sub add_rule_properties {
1426     my ($properties) = @_;
1427
1428     foreach my $k (keys %$rule_properties) {
1429         my $h = $rule_properties->{$k};
1430         # copy data, so that we can modify later without side effects
1431         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1432     }
1433
1434     return $properties;
1435 }
1436
1437 sub delete_rule_properties {
1438     my ($rule, $delete_str) = @_;
1439
1440     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1441         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1442             if !defined($rule_properties->{$opt});
1443         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1444             if $opt eq 'type' || $opt eq 'action';
1445         delete $rule->{$opt};
1446     }
1447
1448     return $rule;
1449 }
1450
1451 my $apply_macro = sub {
1452     my ($macro_name, $param, $verify, $ipversion) = @_;
1453
1454     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1455     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1456
1457     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1458         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1459     }
1460
1461     # skip macros which are specific to another ipversion
1462     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1463         return if $ipversion != $required;
1464     }
1465
1466     my $rules = [];
1467
1468     foreach my $templ (@$macro_rules) {
1469         my $rule = {};
1470         my $param_used = {};
1471         foreach my $k (keys %$templ) {
1472             my $v = $templ->{$k};
1473             if ($v eq 'PARAM') {
1474                 $v = $param->{$k};
1475                 $param_used->{$k} = 1;
1476             } elsif ($v eq 'DEST') {
1477                 $v = $param->{dest};
1478                 $param_used->{dest} = 1;
1479             } elsif ($v eq 'SOURCE') {
1480                 $v = $param->{source};
1481                 $param_used->{source} = 1;
1482             }
1483
1484             if (!defined($v)) {
1485                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1486                 raise_param_exc({ macro => $msg }) if $verify;
1487                 die "$msg\n";
1488             }
1489             $rule->{$k} = $v;
1490         }
1491         foreach my $k (keys %$param) {
1492             next if $k eq 'macro';
1493             next if !defined($param->{$k});
1494             next if $param_used->{$k};
1495             if (defined($rule->{$k})) {
1496                 if ($rule->{$k} ne $param->{$k}) {
1497                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1498                     raise_param_exc({ $k => $msg }) if $verify;
1499                     die "$msg\n";
1500                 }
1501             } else {
1502                 $rule->{$k} = $param->{$k};
1503             }
1504         }
1505         push @$rules, $rule;
1506     }
1507
1508     return $rules;
1509 };
1510
1511 my $rule_env_iface_lookup = {
1512     'ct' => 1,
1513     'vm' => 1,
1514     'group' => 0,
1515     'cluster' => 1,
1516     'host' => 1,
1517 };
1518
1519 sub verify_rule {
1520     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1521
1522     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1523
1524     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1525     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1526
1527     my $errors = $rule->{errors} || {};
1528
1529     my $error_count = 0;
1530
1531     my $add_error = sub {
1532         my ($param, $msg)  = @_;
1533         chomp $msg;
1534         raise_param_exc({ $param => $msg }) if !$noerr;
1535         $error_count++;
1536         $errors->{$param} = $msg if !$errors->{$param};
1537     };
1538
1539     my $ipversion;
1540     my $set_ip_version = sub {
1541         my $vers = shift;
1542         if ($vers) {
1543             die "detected mixed ipv4/ipv6 adresses in rule\n"
1544                 if $ipversion && ($vers != $ipversion);
1545             $ipversion = $vers;
1546         }
1547     };
1548
1549     my $check_ipset_or_alias_property = sub {
1550         my ($name, $expected_ipversion) = @_;
1551
1552         if (my $value = $rule->{$name}) {
1553             if ($value =~ m/^\+/) {
1554                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1555                     &$add_error($name, "no such ipset '$1'")
1556                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1557
1558                 } else {
1559                     &$add_error($name, "invalid ipset name '$value'");
1560                 }
1561             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1562                 my $alias = lc($value);
1563                 &$add_error($name, "no such alias '$value'")
1564                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1565                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1566                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1567
1568                 &$set_ip_version($e->{ipversion});
1569             }
1570         }
1571     };
1572
1573     my $type = $rule->{type};
1574     my $action = $rule->{action};
1575
1576     &$add_error('type', "missing property") if !$type;
1577     &$add_error('action', "missing property") if !$action;
1578
1579     if ($type) {
1580         if ($type eq  'in' || $type eq 'out') {
1581             &$add_error('action', "unknown action '$action'")
1582                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1583         } elsif ($type eq 'group') {
1584             &$add_error('type', "security groups not allowed")
1585                 if !$allow_groups;
1586             &$add_error('action', "invalid characters in security group name")
1587                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1588         } else {
1589             &$add_error('type', "unknown rule type '$type'");
1590         }
1591     }
1592
1593     if ($rule->{iface}) {
1594         &$add_error('type', "parameter -i not allowed for this rule type")
1595             if !$allow_iface;
1596         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1597         &$add_error('iface', $@) if $@;
1598         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1599             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1600                 if $rule->{iface} !~  m/^net(\d+)$/;
1601         }
1602     }
1603
1604     if ($rule->{macro}) {
1605         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1606             $rule->{macro} = $preferred_name;
1607         } else {
1608             &$add_error('macro', "unknown macro '$rule->{macro}'");
1609         }
1610     }
1611
1612     if ($rule->{proto}) {
1613         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1614         &$add_error('proto', $@) if $@;
1615         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1616         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1617     }
1618
1619     if ($rule->{dport}) {
1620         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1621         &$add_error('dport', $@) if $@;
1622         my $proto = $rule->{proto};
1623         &$add_error('proto', "missing property - 'dport' requires this property")
1624             if !$proto;
1625         &$add_error('dport', "protocol '$proto' does not support ports")
1626             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1627                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1628     }
1629
1630     if ($rule->{sport}) {
1631         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1632         &$add_error('sport', $@) if $@;
1633         my $proto = $rule->{proto};
1634         &$add_error('proto', "missing property - 'sport' requires this property")
1635             if !$proto;
1636         &$add_error('sport', "protocol '$proto' does not support ports")
1637             if !$PROTOCOLS_WITH_PORTS->{$proto};
1638     }
1639
1640     if ($rule->{source}) {
1641         eval {
1642             my $source_ipversion = parse_address_list($rule->{source});
1643             &$set_ip_version($source_ipversion);
1644         };
1645         &$add_error('source', $@) if $@;
1646         &$check_ipset_or_alias_property('source', $ipversion);
1647     }
1648
1649     if ($rule->{dest}) {
1650         eval {
1651             my $dest_ipversion = parse_address_list($rule->{dest});
1652             &$set_ip_version($dest_ipversion);
1653         };
1654         &$add_error('dest', $@) if $@;
1655         &$check_ipset_or_alias_property('dest', $ipversion);
1656     }
1657
1658     $rule->{ipversion} = $ipversion if $ipversion;
1659
1660     if ($rule->{macro} && !$error_count) {
1661         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1662         if (my $err = $@) {
1663             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1664                 my $eh = $err->{errors};
1665                 foreach my $p (keys %$eh) {
1666                     &$add_error($p, $eh->{$p});
1667                 }
1668             } else {
1669                 &$add_error('macro', "$err");
1670             }
1671         }
1672     }
1673
1674     $rule->{errors} = $errors if $error_count;
1675
1676     return $rule;
1677 }
1678
1679 sub copy_rule_data {
1680     my ($rule, $param) = @_;
1681
1682     foreach my $k (keys %$rule_properties) {
1683         if (defined(my $v = $param->{$k})) {
1684             if ($v eq '' || $v eq '-') {
1685                 delete $rule->{$k};
1686             } else {
1687                 $rule->{$k} = $v;
1688             }
1689         }
1690     }
1691
1692     return $rule;
1693 }
1694
1695 sub rules_modify_permissions {
1696     my ($rule_env) = @_;
1697
1698     if ($rule_env eq 'host') {
1699         return {
1700             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1701         };
1702     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1703         return {
1704             check => ['perm', '/', [ 'Sys.Modify' ]],
1705         };
1706     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1707         return {
1708             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1709         }
1710     }
1711
1712     return undef;
1713 }
1714
1715 sub rules_audit_permissions {
1716     my ($rule_env) = @_;
1717
1718     if ($rule_env eq 'host') {
1719         return {
1720             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1721         };
1722     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1723         return {
1724             check => ['perm', '/', [ 'Sys.Audit' ]],
1725         };
1726     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1727         return {
1728             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1729         }
1730     }
1731
1732     return undef;
1733 }
1734
1735 # core functions
1736 my $bridge_firewall_enabled = 0;
1737
1738 sub enable_bridge_firewall {
1739
1740     return if $bridge_firewall_enabled; # only once
1741
1742     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1743     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1744
1745     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1746     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1747
1748     $bridge_firewall_enabled = 1;
1749 }
1750
1751 sub iptables_restore_cmdlist {
1752     my ($cmdlist) = @_;
1753
1754     run_command(['iptables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1755 }
1756
1757 sub ip6tables_restore_cmdlist {
1758     my ($cmdlist) = @_;
1759
1760     run_command(['ip6tables-restore', '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1761 }
1762
1763 sub ipset_restore_cmdlist {
1764     my ($cmdlist) = @_;
1765
1766     run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1767 }
1768
1769 sub ebtables_restore_cmdlist {
1770     my ($cmdlist) = @_;
1771
1772     run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1773 }
1774
1775 sub iptables_get_chains {
1776     my ($iptablescmd) = @_;
1777
1778     $iptablescmd = "iptables" if !$iptablescmd;
1779
1780     my $res = {};
1781
1782     # check what chains we want to track
1783     my $is_pvefw_chain = sub {
1784         my $name = shift;
1785
1786         return 1 if $name =~ m/^PVEFW-\S+$/;
1787
1788         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1789
1790         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1791
1792         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1793         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1794
1795         return undef;
1796     };
1797
1798     my $table = '';
1799
1800     my $hooks = {};
1801
1802     my $parser = sub {
1803         my $line = shift;
1804
1805         return if $line =~ m/^#/;
1806         return if $line =~ m/^\s*$/;
1807
1808         if ($line =~ m/^\*(\S+)$/) {
1809             $table = $1;
1810             return;
1811         }
1812
1813         return if $table ne 'filter';
1814
1815         if ($line =~ m/^:(\S+)\s/) {
1816             my $chain = $1;
1817             return if !&$is_pvefw_chain($chain);
1818             $res->{$chain} = "unknown";
1819         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1820             my ($chain, $sig) = ($1, $2);
1821             return if !&$is_pvefw_chain($chain);
1822             $res->{$chain} = $sig;
1823         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1824             $hooks->{$1} = 1;
1825         } else {
1826             # simply ignore the rest
1827             return;
1828         }
1829     };
1830
1831     run_command(["$iptablescmd-save"], outfunc => $parser);
1832
1833     return wantarray ? ($res, $hooks) : $res;
1834 }
1835
1836 sub iptables_chain_digest {
1837     my ($rules) = @_;
1838     my $digest = Digest::SHA->new('sha1');
1839     foreach my $rule (@$rules) { # order is important
1840         $digest->add($rule);
1841     }
1842     return $digest->b64digest;
1843 }
1844
1845 sub ipset_chain_digest {
1846     my ($rules) = @_;
1847
1848     my $digest = Digest::SHA->new('sha1');
1849     foreach my $rule (sort @$rules) { # note: sorted
1850         $digest->add($rule);
1851     }
1852     return $digest->b64digest;
1853 }
1854
1855 sub ipset_get_chains {
1856
1857     my $res = {};
1858     my $chains = {};
1859
1860     my $parser = sub {
1861         my $line = shift;
1862
1863         return if $line =~ m/^#/;
1864         return if $line =~ m/^\s*$/;
1865         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1866             my $chain = $1;
1867             $line =~ s/\s+$//; # delete trailing white space
1868             push @{$chains->{$chain}}, $line;
1869         } else {
1870             # simply ignore the rest
1871             return;
1872         }
1873     };
1874
1875     run_command(['ipset', 'save'], outfunc => $parser);
1876
1877     # compute digest for each chain
1878     foreach my $chain (keys %$chains) {
1879         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1880     }
1881
1882     return $res;
1883 }
1884
1885 sub ebtables_get_chains {
1886
1887     my $res = {};
1888     my $chains = {};
1889     my $parser = sub {
1890         my $line = shift;
1891         return if $line =~ m/^#/;
1892         return if $line =~ m/^\s*$/;
1893         if ($line =~ m/^:(\S+)\s\S+$/) {
1894             # Make sure we know chains exist even if they're empty.
1895             $chains->{$1} //= [];
1896         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1897             my $chain = $1;
1898             $line =~ s/\s+$//;
1899             push @{$chains->{$chain}}, $line;
1900         } else {
1901             # simply ignore the rest
1902             return;
1903         }
1904     };
1905
1906     run_command(['ebtables-save'], outfunc => $parser);
1907     # compute digest for each chain and store rules as well
1908     foreach my $chain (keys %$chains) {
1909         $res->{$chain}->{rules} = $chains->{$chain};
1910         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1911     }
1912     return $res;
1913 }
1914
1915 # substitude action of rule according to action hash
1916 sub rule_substitude_action {
1917     my ($rule, $actions) = @_;
1918
1919     if (my $action = $rule->{action}) {
1920         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1921     }
1922 }
1923
1924 # generate a src or dst match
1925 # $dir(ection) is either d or s
1926 sub ipt_gen_src_or_dst_match {
1927     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1928
1929     my $srcdst;
1930     if ($dir eq 's') {
1931         $srcdst = "src";
1932     } elsif ($dir eq 'd') {
1933         $srcdst = "dst";
1934     } else {
1935         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1936     }
1937
1938     my $match;
1939     if ($adr =~ m/^\+/) {
1940         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1941             my $name = $1;
1942             my $ipset_chain;
1943             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1944                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1945             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1946                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1947             } else {
1948                 die "no such ipset '$name'\n";
1949             }
1950             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1951         } else {
1952             die "invalid security group name '$adr'\n";
1953         }
1954     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1955         my $alias = lc($adr);
1956         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1957         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1958         die "no such alias '$adr'\n" if !$e;
1959         $match = "-${dir} $e->{cidr}";
1960     } elsif ($adr =~ m/\-/){
1961         $match = "-m iprange --${srcdst}-range $adr";
1962     } else {
1963         $match = "-${dir} $adr";
1964     }
1965
1966     return $match;
1967 }
1968
1969 # convert a %rule to an array of iptables commands
1970 sub ipt_rule_to_cmds {
1971     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1972
1973     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1974
1975     my @match = ();
1976
1977     if (defined $rule->{match}) {
1978         push @match, $rule->{match};
1979     } else {
1980         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1981         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1982
1983         if ($rule->{source}) {
1984             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1985         }
1986         if ($rule->{dest}) {
1987             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1988         }
1989
1990         if (my $proto = $rule->{proto}) {
1991             push @match, "-p $proto";
1992
1993             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1994             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1995
1996             my $add_dport = sub {
1997                 return if !$rule->{dport};
1998
1999                 if ($proto eq 'icmp') {
2000                     # Note: we use dport to store --icmp-type
2001                     die "unknown icmp-type '$rule->{dport}'\n"
2002                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2003                     push @match, "-m icmp --icmp-type $rule->{dport}";
2004                 } elsif ($proto eq 'icmpv6') {
2005                     # Note: we use dport to store --icmpv6-type
2006                     die "unknown icmpv6-type '$rule->{dport}'\n"
2007                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2008                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2009                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2010                     die "protocol $proto does not have ports\n";
2011                 } elsif ($multidport) {
2012                     push @match, "--match multiport", "--dports $rule->{dport}";
2013                 } else {
2014                     push @match, "--dport $rule->{dport}";
2015                 }
2016             };
2017
2018             my $add_sport = sub {
2019                 return if !$rule->{sport};
2020
2021                 die "protocol $proto does not have ports\n"
2022                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2023                 if ($multisport) {
2024                     push @match, "--match multiport", "--sports $rule->{sport}";
2025                 } else {
2026                     push @match, "--sport $rule->{sport}";
2027                 }
2028             };
2029
2030             # order matters - single port before multiport!
2031             $add_dport->() if $multisport;
2032             $add_sport->();
2033             $add_dport->() if !$multisport;
2034         } elsif ($rule->{dport} || $rule->{sport}) {
2035             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2036             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2037         }
2038
2039         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2040     }
2041     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2042
2043     my $targetstr;
2044     if (defined $rule->{target}) {
2045         $targetstr = $rule->{target};
2046     } else {
2047         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2048         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2049         $targetstr = ($goto) ? "-g $action" : "-j $action";
2050     }
2051
2052     my @iptcmds;
2053     my $log = $rule->{log};
2054     if (defined($log) && $log ne 'nolog') {
2055         my $loglevel = $log_level_hash->{$log};
2056         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2057         push @iptcmds, "-A $chain $matchstr $logaction";
2058     }
2059     push @iptcmds, "-A $chain $matchstr $targetstr";
2060     return @iptcmds;
2061 }
2062
2063 sub ruleset_generate_rule {
2064     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2065
2066     my $rules;
2067
2068     if ($rule->{macro}) {
2069         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2070     } else {
2071         $rules = [ $rule ];
2072     }
2073
2074     # update all or nothing
2075     my @ipt_rule_cmds;
2076     foreach my $r (@$rules) {
2077         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2078     }
2079     foreach my $c (@ipt_rule_cmds) {
2080         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2081     }
2082 }
2083
2084 sub ruleset_create_chain {
2085     my ($ruleset, $chain) = @_;
2086
2087     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2088     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2089
2090     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2091
2092     $ruleset->{$chain} = [];
2093 }
2094
2095 sub ruleset_chain_exist {
2096     my ($ruleset, $chain) = @_;
2097
2098     return $ruleset->{$chain} ? 1 : undef;
2099 }
2100
2101 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2102 sub ruleset_add_ipt_cmd {
2103    my ($ruleset, $chain, $iptcmd) = @_;
2104
2105    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2106
2107    push @{$ruleset->{$chain}}, $iptcmd;
2108 }
2109
2110 sub ruleset_addrule {
2111     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2112
2113     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2114
2115     if ($log) {
2116         my $loglevel = $log_level_hash->{$log};
2117         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2118         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2119     }
2120     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2121     $match .= ' ' if length($match);
2122     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2123 }
2124
2125 sub ruleset_insertrule {
2126    my ($ruleset, $chain, $match, $action, $log) = @_;
2127
2128    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2129
2130    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2131 }
2132
2133 sub get_log_rule_base {
2134     my ($chain, $vmid, $msg, $loglevel) = @_;
2135
2136     $vmid = 0 if !defined($vmid);
2137     $msg = "" if !defined($msg);
2138
2139     my $rlimit = '';
2140     if (defined($global_log_ratelimit)) {
2141         $rlimit = "-m limit $global_log_ratelimit ";
2142     }
2143
2144     # Note: we use special format for prefix to pass further
2145     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2146     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2147 }
2148
2149 sub ruleset_add_chain_policy {
2150     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2151
2152     if ($policy eq 'ACCEPT') {
2153
2154         my $rule = { action => 'ACCEPT' };
2155         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2156         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2157
2158     } elsif ($policy eq 'DROP') {
2159
2160         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2161
2162         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2163     } elsif ($policy eq 'REJECT') {
2164         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2165
2166         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2167     } else {
2168         # should not happen
2169         die "internal error: unknown policy '$policy'";
2170     }
2171 }
2172
2173 sub ruleset_chain_add_ndp {
2174     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2175     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2176
2177     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2178     if ($direction ne 'OUT' || $options->{radv}) {
2179         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2180     }
2181     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2182     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2183 }
2184
2185 sub ruleset_chain_add_conn_filters {
2186     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2187
2188     if (!$allow_invalid) {
2189         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2190     }
2191     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2192 }
2193
2194 sub ruleset_chain_add_input_filters {
2195     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2196
2197     if ($cluster_conf->{ipset}->{blacklist}){
2198         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2199             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2200             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2201         }
2202         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2203         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2204     }
2205
2206     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2207         if ($ipversion == 4) {
2208             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2209         }
2210     }
2211
2212     if ($options->{tcpflags}) {
2213         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2214     }
2215 }
2216
2217 sub ruleset_create_vm_chain {
2218     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2219
2220     ruleset_create_chain($ruleset, $chain);
2221     my $accept = generate_nfqueue($options);
2222
2223     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2224         if ($ipversion == 4) {
2225             if ($direction eq 'OUT') {
2226                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2227                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2228                                         proto => 'udp', sport => 68, dport => 67 });
2229             } else {
2230                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2231                                       { action => 'ACCEPT',
2232                                         proto => 'udp', sport => 67, dport => 68 });
2233             }
2234         } elsif ($ipversion == 6) {
2235             if ($direction eq 'OUT') {
2236                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2237                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2238                                         proto => 'udp', sport => 546, dport => 547 });
2239             } else {
2240                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2241                                       { action => 'ACCEPT',
2242                                         proto => 'udp', sport => 547, dport => 546 });
2243             }
2244         }
2245
2246     }
2247
2248     if ($direction eq 'OUT') {
2249         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2250             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2251         }
2252         if ($ipversion == 6 && !$options->{radv}) {
2253             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2254         }
2255         if ($ipfilter_ipset) {
2256             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2257         }
2258         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2259     }
2260
2261     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2262     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2263 }
2264
2265 sub ruleset_add_group_rule {
2266     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2267
2268     my $group = $rule->{action};
2269     my $group_chain = "GROUP-$group-$direction";
2270     if(!ruleset_chain_exist($ruleset, $group_chain)){
2271         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2272     }
2273
2274     if ($direction eq 'OUT' && $rule->{iface_out}) {
2275         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2276     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2277         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2278     } else {
2279         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2280     }
2281
2282     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2283 }
2284
2285 sub ruleset_generate_vm_rules {
2286     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2287
2288     my $lc_direction = lc($direction);
2289
2290     my $in_accept = generate_nfqueue($options);
2291
2292     foreach my $rule (@$rules) {
2293         next if $rule->{iface} && $rule->{iface} ne $netid;
2294         next if !$rule->{enable} || $rule->{errors};
2295         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2296
2297         if ($rule->{type} eq 'group') {
2298             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2299                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2300         } else {
2301             next if $rule->{type} ne $lc_direction;
2302             eval {
2303                 $rule->{logmsg} = "$rule->{action}: ";
2304                 if ($direction eq 'OUT') {
2305                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2306                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2307                 } else {
2308                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2309                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2310                 }
2311             };
2312             warn $@ if $@;
2313         }
2314     }
2315 }
2316
2317 sub generate_nfqueue {
2318     my ($options) = @_;
2319
2320     if ($options->{ips}) {
2321         my $action = "NFQUEUE";
2322         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2323             if (defined($3) && defined($1)) {
2324                 $action .= " --queue-balance $1:$3";
2325             } elsif (defined($1)) {
2326                 $action .= " --queue-num $1";
2327             }
2328         }
2329         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2330         return $action;
2331     } else {
2332         return "ACCEPT";
2333     }
2334 }
2335
2336 sub ruleset_generate_vm_ipsrules {
2337     my ($ruleset, $options, $direction, $iface) = @_;
2338
2339     if ($options->{ips} && $direction eq 'IN') {
2340         my $nfqueue = generate_nfqueue($options);
2341
2342         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2343             ruleset_create_chain($ruleset, "PVEFW-IPS");
2344         }
2345
2346         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2347     }
2348 }
2349
2350 sub generate_tap_rules_direction {
2351     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2352
2353     my $lc_direction = lc($direction);
2354
2355     my $rules = $vmfw_conf->{rules};
2356
2357     my $options = $vmfw_conf->{options};
2358     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2359
2360     my $tapchain = "$iface-$direction";
2361
2362     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2363     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2364         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2365
2366     # create chain with mac and ip filter
2367     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2368
2369     if ($options->{enable}) {
2370         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2371
2372         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2373
2374         # implement policy
2375         my $policy;
2376
2377         if ($direction eq 'OUT') {
2378             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2379         } else {
2380             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2381         }
2382
2383         my $accept = generate_nfqueue($options);
2384         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2385         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2386     } else {
2387         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2388         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2389     }
2390
2391     # plug the tap chain to bridge chain
2392     if ($direction eq 'IN') {
2393         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2394                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2395     } else {
2396         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2397                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2398     }
2399 }
2400
2401 sub enable_host_firewall {
2402     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2403
2404     my $options = $hostfw_conf->{options};
2405     my $cluster_options = $cluster_conf->{options};
2406     my $rules = $hostfw_conf->{rules};
2407     my $cluster_rules = $cluster_conf->{rules};
2408
2409     # corosync preparation
2410     my $corosync_rule = "-p udp --dport 5404:5405";
2411     my $corosync_local_addresses = {};
2412     my $multicast_enabled;
2413     my $local_hostname = PVE::INotify::nodename();
2414     if (defined($corosync_conf)) {
2415         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2416             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2417
2418             if ($node_name eq $local_hostname) {
2419                 $corosync_local_addresses->{$key} = $node_ip;
2420             }
2421         });
2422
2423         # allow multicast only if enabled in config
2424         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2425         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2426     }
2427
2428     # host inbound firewall
2429     my $chain = "PVEFW-HOST-IN";
2430     ruleset_create_chain($ruleset, $chain);
2431
2432     my $loglevel = get_option_log_level($options, "log_level_in");
2433
2434     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2435
2436     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2437     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2438     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2439
2440     # we use RETURN because we need to check also tap rules
2441     my $accept_action = 'RETURN';
2442
2443     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2444
2445     # add host rules first, so that cluster wide rules can be overwritten
2446     foreach my $rule (@$rules, @$cluster_rules) {
2447         next if !$rule->{enable} || $rule->{errors};
2448         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2449
2450         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2451
2452         eval {
2453             if ($rule->{type} eq 'group') {
2454                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2455             } elsif ($rule->{type} eq 'in') {
2456                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2457                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2458             }
2459         };
2460         warn $@ if $@;
2461         delete $rule->{iface_in};
2462     }
2463
2464     # allow standard traffic for management ipset (includes cluster network)
2465     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2466     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2467     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2468     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2469     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2470     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2471
2472     # corosync inbound rules
2473     if (defined($corosync_conf)) {
2474         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2475             if $multicast_enabled;
2476
2477         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2478             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2479             my $destination = $corosync_local_addresses->{$key};
2480
2481             if ($node_name ne $local_hostname && defined($destination)) {
2482                 # accept only traffic on same ring
2483                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2484             }
2485         });
2486     }
2487
2488     # implement input policy
2489     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2490     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2491
2492     # host outbound firewall
2493     $chain = "PVEFW-HOST-OUT";
2494     ruleset_create_chain($ruleset, $chain);
2495
2496     $loglevel = get_option_log_level($options, "log_level_out");
2497
2498     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2499
2500     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2501
2502     # we use RETURN because we may want to check other thigs later
2503     $accept_action = 'RETURN';
2504     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2505
2506     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2507
2508     # add host rules first, so that cluster wide rules can be overwritten
2509     foreach my $rule (@$rules, @$cluster_rules) {
2510         next if !$rule->{enable} || $rule->{errors};
2511         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2512
2513         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2514         eval {
2515             $rule->{logmsg} = "$rule->{action}: ";
2516             if ($rule->{type} eq 'group') {
2517                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2518             } elsif ($rule->{type} eq 'out') {
2519                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2520                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2521             }
2522         };
2523         warn $@ if $@;
2524         delete $rule->{iface_out};
2525     }
2526
2527     # allow standard traffic on cluster network
2528     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2529     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2530
2531     if ($localnet && ($ipversion == $localnet_ver)) {
2532         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2533         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2534         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2535         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2536     }
2537
2538     # corosync outbound rules
2539     if (defined($corosync_conf)) {
2540         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2541             if $multicast_enabled;
2542
2543         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2544             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2545             my $source = $corosync_local_addresses->{$key};
2546
2547             if ($node_name ne $local_hostname && defined($source)) {
2548                 # accept only traffic on same ring
2549                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2550             }
2551         });
2552     }
2553
2554     # implement output policy
2555     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2556     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2557
2558     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2559     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2560 }
2561
2562 sub generate_group_rules {
2563     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2564
2565     my $rules = $cluster_conf->{groups}->{$group};
2566
2567     if (!$rules) {
2568         warn "no such security group '$group'\n";
2569         $rules = []; # create empty chain
2570     }
2571
2572     my $chain = "GROUP-${group}-IN";
2573
2574     ruleset_create_chain($ruleset, $chain);
2575     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2576
2577     foreach my $rule (@$rules) {
2578         next if $rule->{type} ne 'in';
2579         next if !$rule->{enable} || $rule->{errors};
2580         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2581         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2582         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2583     }
2584
2585     $chain = "GROUP-${group}-OUT";
2586
2587     ruleset_create_chain($ruleset, $chain);
2588     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2589
2590     foreach my $rule (@$rules) {
2591         next if $rule->{type} ne 'out';
2592         next if !$rule->{enable} || $rule->{errors};
2593         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2594         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2595         # check also other tap rules later
2596         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2597         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2598     }
2599 }
2600
2601 my $MAX_NETS = 32;
2602 my $valid_netdev_names = {};
2603 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2604     $valid_netdev_names->{"net$i"} = 1;
2605 }
2606
2607 sub get_mark_values {
2608     my ($value, $mask) = @_;
2609     $value = hex($value) if $value =~ /^0x/;
2610     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2611     $mask = 0xffffffff if !defined($mask);
2612     return ($value, $mask);
2613 }
2614
2615 sub parse_fw_rule {
2616     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2617
2618     my $orig_line = $line;
2619
2620     my $rule = {};
2621
2622     # we can add single line comments to the end of the rule
2623     if ($line =~ s/#\s*(.*?)\s*$//) {
2624         $rule->{comment} = decode('utf8', $1);
2625     }
2626
2627     # we can disable a rule when prefixed with '|'
2628
2629     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2630
2631     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2632         die "unable to parse rule: $line\n";
2633
2634     $rule->{type} = lc($1);
2635     $rule->{action} = $2;
2636
2637     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2638         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2639             $rule->{macro} = $1;
2640             $rule->{action} = $2;
2641         }
2642     }
2643
2644     while (length($line)) {
2645         if ($line =~ s/^-i (\S+)\s*//) {
2646             $rule->{iface} = $1;
2647             next;
2648         }
2649
2650         last if $rule->{type} eq 'group';
2651
2652         if ($line =~ s/^-p (\S+)\s*//) {
2653             $rule->{proto} = $1;
2654             next;
2655         }
2656
2657         if ($line =~ s/^-dport (\S+)\s*//) {
2658             $rule->{dport} = $1;
2659             next;
2660         }
2661
2662         if ($line =~ s/^-sport (\S+)\s*//) {
2663             $rule->{sport} = $1;
2664             next;
2665         }
2666         if ($line =~ s/^-source (\S+)\s*//) {
2667             $rule->{source} = $1;
2668             next;
2669         }
2670         if ($line =~ s/^-dest (\S+)\s*//) {
2671             $rule->{dest} = $1;
2672             next;
2673         }
2674         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2675             $rule->{log} = $1;
2676             next;
2677         }
2678
2679         last;
2680     }
2681
2682     die "unable to parse rule parameters: $line\n" if length($line);
2683
2684     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2685     if ($rule->{errors}) {
2686         # The verbose flag really means we're running from the CLI and want
2687         # output on the console - in the other case we really want such errors
2688         # to go into the syslog instead.
2689         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2690         $log->("$prefix - errors in rule parameters: $orig_line\n");
2691         foreach my $p (keys %{$rule->{errors}}) {
2692             $log->("  $p: $rule->{errors}->{$p}\n");
2693         }
2694     }
2695
2696     return $rule;
2697 }
2698
2699 sub verify_ethertype {
2700     my ($value) = @_;
2701     my $types = get_etc_ethertypes();
2702     die "unknown ethernet protocol type: $value\n"
2703         if !defined($types->{byname}->{$value}) &&
2704            !defined($types->{byid}->{$value});
2705 }
2706
2707 sub parse_vmfw_option {
2708     my ($line) = @_;
2709
2710     my ($opt, $value);
2711
2712     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2713
2714     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2715         $opt = lc($1);
2716         $value = int($2);
2717     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2718         $opt = lc($1);
2719         $value = $2 ? lc($3) : '';
2720     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2721         $opt = lc($1);
2722         $value = uc($3);
2723     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2724         $opt = lc($1);
2725         $value = $2;
2726     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2727         $opt = lc($1);
2728         $value = $2;
2729         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2730     } else {
2731         die "can't parse option '$line'\n"
2732     }
2733
2734     return ($opt, $value);
2735 }
2736
2737 sub parse_hostfw_option {
2738     my ($line) = @_;
2739
2740     my ($opt, $value);
2741
2742     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2743
2744     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2745         $opt = lc($1);
2746         $value = int($2);
2747     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2748         $opt = lc($1);
2749         $value = $2 ? lc($3) : '';
2750     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2751         $opt = lc($1);
2752         $value = int($2);
2753     } else {
2754         die "can't parse option '$line'\n"
2755     }
2756
2757     return ($opt, $value);
2758 }
2759
2760 sub parse_clusterfw_option {
2761     my ($line) = @_;
2762
2763     my ($opt, $value);
2764
2765     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2766         $opt = lc($1);
2767         $value = int($2);
2768         if (($value > 1) && ((time() - $value) > 60)) {
2769             $value = 0
2770         }
2771     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2772         $opt = lc($1);
2773         $value = int($2);
2774     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2775         $opt = lc($1);
2776         $value = uc($3);
2777     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2778         $opt = lc($1);
2779         $value = $2;
2780     } else {
2781         die "can't parse option '$line'\n"
2782     }
2783
2784     return ($opt, $value);
2785 }
2786
2787 sub resolve_alias {
2788     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2789
2790     my $alias = lc($cidr);
2791     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2792     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2793
2794     die "no such alias '$cidr'\n" if !$e;;
2795
2796     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2797 }
2798
2799 sub parse_ip_or_cidr {
2800     my ($cidr) = @_;
2801
2802     my $ipversion;
2803
2804     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2805         $cidr =~ s|/128$||;
2806         $ipversion = 6;
2807     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2808         $cidr =~ s|/32$||;
2809         $ipversion = 4;
2810     } else {
2811         die "value does not look like a valid IP address or CIDR network\n";
2812     }
2813
2814     return wantarray ? ($cidr, $ipversion) : $cidr;
2815 }
2816
2817 sub parse_alias {
2818     my ($line) = @_;
2819
2820     # we can add single line comments to the end of the line
2821     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2822
2823     if ($line =~ m/^(\S+)\s(\S+)$/) {
2824         my ($name, $cidr) = ($1, $2);
2825         my $ipversion;
2826
2827         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2828
2829         my $data = {
2830             name => $name,
2831             cidr => $cidr,
2832             ipversion => $ipversion,
2833         };
2834         $data->{comment} = $comment  if $comment;
2835         return $data;
2836     }
2837
2838     return undef;
2839 }
2840
2841 sub generic_fw_config_parser {
2842     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2843
2844     my $section;
2845     my $group;
2846
2847     my $res = $empty_conf;
2848
2849     my $raw;
2850     if ($filename =~ m!^/etc/pve/(.*)$!) {
2851         $raw = PVE::Cluster::get_config($1);
2852     } else {
2853         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2854     }
2855     return {} if !$raw;
2856
2857     my $linenr = 0;
2858     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2859         my $line = $1;
2860         $linenr++;
2861         next if $line =~ m/^#/;
2862         next if $line =~ m/^\s*$/;
2863         chomp $line;
2864
2865         my $prefix = "$filename (line $linenr)";
2866
2867         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2868             $section = 'options';
2869             next;
2870         }
2871
2872         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2873             $section = 'aliases';
2874             next;
2875         }
2876
2877         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2878             $section = 'groups';
2879             $group = lc($1);
2880             my $comment = $2;
2881             eval {
2882                 die "security group name too long\n" if length($group) > $max_group_name_length;
2883                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2884             };
2885             if (my $err = $@) {
2886                 ($section, $group, $comment) = undef;
2887                 warn "$prefix: $err";
2888                 next;
2889             }
2890
2891             $res->{$section}->{$group} = [];
2892             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2893                 if $comment;
2894             next;
2895         }
2896
2897         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2898             $section = 'rules';
2899             next;
2900         }
2901
2902         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2903             $section = 'ipset';
2904             $group = lc($1);
2905             my $comment = $2;
2906             eval {
2907                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2908                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2909             };
2910             if (my $err = $@) {
2911                 ($section, $group, $comment) = undef;
2912                 warn "$prefix: $err";
2913                 next;
2914             }
2915
2916             $res->{$section}->{$group} = [];
2917             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2918                 if $comment;
2919             next;
2920         }
2921
2922         if (!$section) {
2923             warn "$prefix: skip line - no section\n";
2924             next;
2925         }
2926
2927         if ($section eq 'options') {
2928             eval {
2929                 my ($opt, $value);
2930                 if ($rule_env eq 'cluster') {
2931                     ($opt, $value) = parse_clusterfw_option($line);
2932                 } elsif ($rule_env eq 'host') {
2933                     ($opt, $value) = parse_hostfw_option($line);
2934                 } else {
2935                     ($opt, $value) = parse_vmfw_option($line);
2936                 }
2937                 $res->{options}->{$opt} = $value;
2938             };
2939             warn "$prefix: $@" if $@;
2940         } elsif ($section eq 'aliases') {
2941             eval {
2942                 my $data = parse_alias($line);
2943                 $res->{aliases}->{lc($data->{name})} = $data;
2944             };
2945             warn "$prefix: $@" if $@;
2946         } elsif ($section eq 'rules') {
2947             my $rule;
2948             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2949             if (my $err = $@) {
2950                 warn "$prefix: $err";
2951                 next;
2952             }
2953             push @{$res->{$section}}, $rule;
2954         } elsif ($section eq 'groups') {
2955             my $rule;
2956             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2957             if (my $err = $@) {
2958                 warn "$prefix: $err";
2959                 next;
2960             }
2961             push @{$res->{$section}->{$group}}, $rule;
2962         } elsif ($section eq 'ipset') {
2963             # we can add single line comments to the end of the rule
2964             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2965
2966             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2967             my $nomatch = $1;
2968             my $cidr = $2;
2969             my $errors;
2970
2971             if ($nomatch && !$feature_ipset_nomatch) {
2972                 $errors->{nomatch} = "nomatch not supported by kernel";
2973             }
2974
2975             eval {
2976                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2977                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2978                 } else {
2979                     $cidr = parse_ip_or_cidr($cidr);
2980                 }
2981             };
2982             if (my $err = $@) {
2983                 chomp $err;
2984                 $errors->{cidr} = $err;
2985             }
2986
2987             if ($cidr =~ m!/0+$!) {
2988                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2989             }
2990
2991             my $entry = { cidr => $cidr };
2992             $entry->{nomatch} = 1 if $nomatch;
2993             $entry->{comment} = $comment if $comment;
2994             $entry->{errors} =  $errors if $errors;
2995
2996             if ($verbose && $errors) {
2997                 warn "$prefix - errors in ipset '$group': $line\n";
2998                 foreach my $p (keys %{$errors}) {
2999                     warn "  $p: $errors->{$p}\n";
3000                 }
3001             }
3002
3003             push @{$res->{$section}->{$group}}, $entry;
3004         } else {
3005             warn "$prefix: skip line - unknown section\n";
3006             next;
3007         }
3008     }
3009
3010     return $res;
3011 }
3012
3013 sub run_locked {
3014     my ($code, @param) = @_;
3015
3016     my $timeout = 10;
3017
3018     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3019
3020     die $@ if $@;
3021
3022     return $res;
3023 }
3024
3025 sub read_local_vm_config {
3026
3027     my $qemu = {};
3028     my $lxc = {};
3029
3030     my $vmdata = { qemu => $qemu, lxc => $lxc };
3031
3032     my $vmlist = PVE::Cluster::get_vmlist();
3033     return $vmdata if !$vmlist || !$vmlist->{ids};
3034     my $ids = $vmlist->{ids};
3035
3036     foreach my $vmid (keys %$ids) {
3037         next if !$vmid; # skip VE0
3038         my $d = $ids->{$vmid};
3039         next if !$d->{node} || $d->{node} ne $nodename;
3040         next if !$d->{type};
3041         if ($d->{type} eq 'qemu') {
3042             if ($have_qemu_server) {
3043                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3044                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3045                     $qemu->{$vmid} = $conf;
3046                 }
3047             }
3048         } elsif ($d->{type} eq 'lxc') {
3049             if ($have_lxc) {
3050                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3051                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3052                     $lxc->{$vmid} = $conf;
3053                 }
3054             }
3055         }
3056     }
3057
3058     return $vmdata;
3059 };
3060
3061 sub load_vmfw_conf {
3062     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3063
3064     $dir = $pvefw_conf_dir if !defined($dir);
3065     my $filename = "$dir/$vmid.fw";
3066
3067     my $empty_conf = {
3068         rules => [],
3069         options => {},
3070         aliases => {},
3071         ipset => {} ,
3072         ipset_comments => {},
3073     };
3074
3075     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3076     $vmfw_conf->{vmid} = $vmid;
3077
3078     return $vmfw_conf;
3079 }
3080
3081 my $format_rules = sub {
3082     my ($rules, $allow_iface) = @_;
3083
3084     my $raw = '';
3085
3086     foreach my $rule (@$rules) {
3087         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3088             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3089             $raw .= uc($rule->{type});
3090             if ($rule->{macro}) {
3091                 $raw .= " $rule->{macro}($rule->{action})";
3092             } else {
3093                 $raw .= " " . $rule->{action};
3094             }
3095             if ($allow_iface && $rule->{iface}) {
3096                 $raw .= " -i $rule->{iface}";
3097             }
3098
3099             if ($rule->{type} ne  'group')  {
3100                 $raw .= " -source $rule->{source}" if $rule->{source};
3101                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3102                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3103                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3104                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3105                 $raw .= " -log $rule->{log}" if $rule->{log};
3106             }
3107
3108             $raw .= " # " . encode('utf8', $rule->{comment})
3109                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3110             $raw .= "\n";
3111         } else {
3112             die "unknown rule type '$rule->{type}'";
3113         }
3114     }
3115
3116     return $raw;
3117 };
3118
3119 my $format_options = sub {
3120     my ($options) = @_;
3121
3122     my $raw = '';
3123
3124     $raw .= "[OPTIONS]\n\n";
3125     foreach my $opt (keys %$options) {
3126         $raw .= "$opt: $options->{$opt}\n";
3127     }
3128     $raw .= "\n";
3129
3130     return $raw;
3131 };
3132
3133 my $format_aliases = sub {
3134     my ($aliases) = @_;
3135
3136     my $raw = '';
3137
3138     $raw .= "[ALIASES]\n\n";
3139     foreach my $k (keys %$aliases) {
3140         my $e = $aliases->{$k};
3141         $raw .= "$e->{name} $e->{cidr}";
3142         $raw .= " # " . encode('utf8', $e->{comment})
3143             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3144         $raw .= "\n";
3145     }
3146     $raw .= "\n";
3147
3148     return $raw;
3149 };
3150
3151 my $format_ipsets = sub {
3152     my ($fw_conf) = @_;
3153
3154     my $raw = '';
3155
3156     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3157         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3158             my $utf8comment = encode('utf8', $comment);
3159             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3160         } else {
3161             $raw .= "[IPSET $ipset]\n\n";
3162         }
3163         my $options = $fw_conf->{ipset}->{$ipset};
3164
3165         my $nethash = {};
3166         foreach my $entry (@$options) {
3167             $nethash->{$entry->{cidr}} = $entry;
3168         }
3169
3170         foreach my $cidr (sort keys %$nethash) {
3171             my $entry = $nethash->{$cidr};
3172             my $line = $entry->{nomatch} ? '!' : '';
3173             $line .= $entry->{cidr};
3174             $line .= " # " . encode('utf8', $entry->{comment})
3175                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3176             $raw .= "$line\n";
3177         }
3178
3179         $raw .= "\n";
3180     }
3181
3182     return $raw;
3183 };
3184
3185 sub save_vmfw_conf {
3186     my ($vmid, $vmfw_conf) = @_;
3187
3188     my $raw = '';
3189
3190     my $options = $vmfw_conf->{options};
3191     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3192
3193     my $aliases = $vmfw_conf->{aliases};
3194     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3195
3196     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3197
3198     my $rules = $vmfw_conf->{rules} || [];
3199     if ($rules && scalar(@$rules)) {
3200         $raw .= "[RULES]\n\n";
3201         $raw .= &$format_rules($rules, 1);
3202         $raw .= "\n";
3203     }
3204
3205     my $filename = "$pvefw_conf_dir/$vmid.fw";
3206     if ($raw) {
3207         mkdir $pvefw_conf_dir;
3208         PVE::Tools::file_set_contents($filename, $raw);
3209     } else {
3210         unlink $filename;
3211     }
3212 }
3213
3214 sub remove_vmfw_conf {
3215     my ($vmid) = @_;
3216
3217     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3218
3219     unlink $vmfw_conffile;
3220 }
3221
3222 sub clone_vmfw_conf {
3223     my ($vmid, $newid) = @_;
3224
3225     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3226     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3227
3228     if (-f $clonevm_conffile) {
3229         unlink $clonevm_conffile;
3230     }
3231     if (-f $sourcevm_conffile) {
3232         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3233         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3234     }
3235 }
3236
3237 sub read_vm_firewall_configs {
3238     my ($cluster_conf, $vmdata, $dir) = @_;
3239
3240     my $vmfw_configs = {};
3241
3242     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3243         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3244         next if !$vmfw_conf->{options}; # skip if file does not exists
3245         $vmfw_configs->{$vmid} = $vmfw_conf;
3246     }
3247     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3248         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3249         next if !$vmfw_conf->{options}; # skip if file does not exists
3250         $vmfw_configs->{$vmid} = $vmfw_conf;
3251     }
3252
3253     return $vmfw_configs;
3254 }
3255
3256 sub get_option_log_level {
3257     my ($options, $k) = @_;
3258
3259     my $v = $options->{$k};
3260     $v = $default_log_level if !defined($v);
3261
3262     return undef if $v eq '' || $v eq 'nolog';
3263
3264     return $v if defined($log_level_hash->{$v});
3265
3266     warn "unknown log level ($k = '$v')\n";
3267
3268     return undef;
3269 }
3270
3271 sub generate_std_chains {
3272     my ($ruleset, $options, $ipversion) = @_;
3273
3274     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3275
3276     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3277     my $chain = 'PVEFW-smurflog';
3278     if ( $std_chains->{$chain} ) {
3279         foreach my $r (@{$std_chains->{$chain}}) {
3280           $r->{log} = $loglevel;
3281         }
3282     }
3283
3284     # same as shorewall logflags action.
3285     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3286     $chain = 'PVEFW-logflags';
3287     if ( $std_chains->{$chain} ) {
3288         foreach my $r (@{$std_chains->{$chain}}) {
3289           $r->{log} = $loglevel;
3290         }
3291     }
3292
3293     foreach my $chain (keys %$std_chains) {
3294         ruleset_create_chain($ruleset, $chain);
3295         foreach my $rule (@{$std_chains->{$chain}}) {
3296             if (ref($rule)) {
3297                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3298             } else {
3299                 die "rule $rule as string - should not happen";
3300             }
3301         }
3302     }
3303 }
3304
3305 sub generate_ipset_chains {
3306     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3307
3308     foreach my $ipset (keys %{$ipsets}) {
3309
3310         my $options = $ipsets->{$ipset};
3311
3312         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3313             if (my $ips = $device_ips->{$1}) {
3314                 $options = [@$options, @$ips];
3315             }
3316         }
3317
3318         # remove duplicates
3319         my $nethash = {};
3320         foreach my $entry (@$options) {
3321             next if $entry->{errors}; # skip entries with errors
3322             eval {
3323                 my ($cidr, $ver);
3324                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3325                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3326                 } else {
3327                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3328                 }
3329                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3330                 if ($ver == 6) {
3331                     # ip_compress_address takes an address only, no CIDR
3332                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3333                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3334                     $cidr .= $prefix_len if defined($prefix_len);
3335                     $cidr =~ s|/128$||;
3336                 } else {
3337                     $cidr =~ s|/32$||;
3338                 }
3339
3340                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3341             };
3342             warn $@ if $@;
3343         }
3344
3345         foreach my $ipversion (4, 6) {
3346             my $data = $nethash->{$ipversion};
3347
3348             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3349
3350             my $hashsize = scalar(@$options);
3351             if ($hashsize <= 64) {
3352                 $hashsize = 64;
3353             } else {
3354                 $hashsize = round_powerof2($hashsize);
3355             }
3356
3357             my $family = $ipversion == "6" ? "inet6" : "inet";
3358
3359             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3360
3361             foreach my $cidr (sort keys %$data) {
3362                 my $entry = $data->{$cidr};
3363
3364                 my $cmd = "add $name $cidr";
3365                 if ($entry->{nomatch}) {
3366                     if ($feature_ipset_nomatch) {
3367                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3368                     } else {
3369                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3370                     }
3371                 } else {
3372                     push @{$ipset_ruleset->{$name}}, $cmd;
3373                 }
3374             }
3375         }
3376     }
3377 }
3378
3379 sub round_powerof2 {
3380     my ($int) = @_;
3381
3382     $int--;
3383     $int |= $int >> $_ foreach (1,2,4,8,16);
3384     return ++$int;
3385 }
3386
3387 my $set_global_log_ratelimit = sub {
3388     my $cluster_opts = shift;
3389
3390     $global_log_ratelimit = '--limit 1/sec';
3391     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3392         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3393         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3394
3395         if ($limit->{enable}) {
3396             if (my $rate = $limit->{rate}) {
3397                 $global_log_ratelimit = "--limit $rate";
3398             }
3399             if (my $burst = $limit->{burst}) {
3400                 $global_log_ratelimit .= " --limit-burst $burst";
3401             }
3402         } else {
3403             $global_log_ratelimit = undef;
3404         }
3405     }
3406 };
3407
3408 sub load_clusterfw_conf {
3409     my ($filename) = @_;
3410
3411     $filename = $clusterfw_conf_filename if !defined($filename);
3412     my $empty_conf = {
3413         rules => [],
3414         options => {},
3415         aliases => {},
3416         groups => {},
3417         group_comments => {},
3418         ipset => {} ,
3419         ipset_comments => {},
3420     };
3421
3422     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3423     $set_global_log_ratelimit->($cluster_conf->{options});
3424
3425     return $cluster_conf;
3426 }
3427
3428 sub save_clusterfw_conf {
3429     my ($cluster_conf) = @_;
3430
3431     my $raw = '';
3432
3433     my $options = $cluster_conf->{options};
3434     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3435
3436     my $aliases = $cluster_conf->{aliases};
3437     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3438
3439     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3440
3441     my $rules = $cluster_conf->{rules};
3442     if ($rules && scalar(@$rules)) {
3443         $raw .= "[RULES]\n\n";
3444         $raw .= &$format_rules($rules, 1);
3445         $raw .= "\n";
3446     }
3447
3448     if ($cluster_conf->{groups}) {
3449         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3450             my $rules = $cluster_conf->{groups}->{$group};
3451             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3452                 my $utf8comment = encode('utf8', $comment);
3453                 $raw .= "[group $group] # $utf8comment\n\n";
3454             } else {
3455                 $raw .= "[group $group]\n\n";
3456             }
3457
3458             $raw .= &$format_rules($rules, 0);
3459             $raw .= "\n";
3460         }
3461     }
3462
3463     if ($raw) {
3464         mkdir $pvefw_conf_dir;
3465         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3466     } else {
3467         unlink $clusterfw_conf_filename;
3468     }
3469 }
3470
3471 sub load_hostfw_conf {
3472     my ($cluster_conf, $filename) = @_;
3473
3474     $filename = $hostfw_conf_filename if !defined($filename);
3475
3476     my $empty_conf = { rules => [], options => {}};
3477     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3478 }
3479
3480 sub save_hostfw_conf {
3481     my ($hostfw_conf) = @_;
3482
3483     my $raw = '';
3484
3485     my $options = $hostfw_conf->{options};
3486     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3487
3488     my $rules = $hostfw_conf->{rules};
3489     if ($rules && scalar(@$rules)) {
3490         $raw .= "[RULES]\n\n";
3491         $raw .= &$format_rules($rules, 1);
3492         $raw .= "\n";
3493     }
3494
3495     if ($raw) {
3496         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3497     } else {
3498         unlink $hostfw_conf_filename;
3499     }
3500 }
3501
3502 sub compile {
3503     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3504
3505     my $vmfw_configs;
3506
3507     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3508     $pve_std_chains = dclone($pve_std_chains_conf);
3509
3510     if ($vmdata) { # test mode
3511         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3512         my $filename = "$testdir/cluster.fw";
3513         $cluster_conf = load_clusterfw_conf($filename);
3514
3515         $filename = "$testdir/host.fw";
3516         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3517
3518         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3519     } else { # normal operation
3520         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3521
3522         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3523
3524         # cfs_update is handled by daemon or API
3525         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3526             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3527
3528         $vmdata = read_local_vm_config();
3529         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3530     }
3531
3532     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3533
3534     my $localnet;
3535     if ($cluster_conf->{aliases}->{local_network}) {
3536         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3537     } else {
3538         my $localnet_ver;
3539         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3540
3541         $cluster_conf->{aliases}->{local_network} = {
3542             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3543     }
3544
3545     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3546
3547     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3548     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3549     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3550     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3551
3552     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3553 }
3554
3555 sub compile_iptables_filter {
3556     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3557
3558     my $ruleset = {};
3559
3560     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3561     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3562
3563     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3564
3565     my $hostfw_options = $hostfw_conf->{options} || {};
3566
3567     # fixme: what log level should we use here?
3568     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3569
3570     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3571     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3572
3573     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3574     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3575
3576     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3577
3578     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3579     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3580
3581     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3582
3583     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3584
3585     if ($hostfw_enable) {
3586         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3587         warn $@ if $@; # just to be sure - should not happen
3588     }
3589
3590     # generate firewall rules for QEMU VMs
3591     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3592         eval {
3593             my $conf = $vmdata->{qemu}->{$vmid};
3594             my $vmfw_conf = $vmfw_configs->{$vmid};
3595             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3596
3597             foreach my $netid (sort keys %$conf) {
3598                 next if $netid !~ m/^net(\d+)$/;
3599                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3600                 next if !$net->{firewall};
3601                 my $iface = "tap${vmid}i$1";
3602
3603                 my $macaddr = $net->{macaddr};
3604                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3605                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3606                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3607                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3608             }
3609         };
3610         warn $@ if $@; # just to be sure - should not happen
3611     }
3612
3613     # generate firewall rules for LXC containers
3614     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3615         eval {
3616             my $conf = $vmdata->{lxc}->{$vmid};
3617             my $vmfw_conf = $vmfw_configs->{$vmid};
3618              return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3619                 foreach my $netid (sort keys %$conf) {
3620                     next if $netid !~ m/^net(\d+)$/;
3621                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3622                     next if !$net->{firewall};
3623                     my $iface = "veth${vmid}i$1";
3624                     my $macaddr = $net->{hwaddr};
3625                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3626                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3627                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3628                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3629             }
3630         };
3631         warn $@ if $@; # just to be sure - should not happen
3632     }
3633
3634     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3635         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3636     }
3637
3638     return $ruleset;
3639 }
3640
3641 sub mac_to_linklocal {
3642     my ($macaddr) = @_;
3643     my @parts = split(/:/, $macaddr);
3644     # The standard link local address uses the fe80::/64 prefix with the
3645     # modified EUI-64 identifier derived from the MAC address by flipping the
3646     # universal/local bit and inserting FF:FE in the middle.
3647     # See RFC 4291.
3648     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3649     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3650     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3651 }
3652
3653 sub compile_ipsets {
3654     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3655
3656     my $localnet;
3657     if ($cluster_conf->{aliases}->{local_network}) {
3658         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3659     } else {
3660         my $localnet_ver;
3661         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3662
3663         $cluster_conf->{aliases}->{local_network} = {
3664             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3665     }
3666
3667     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3668
3669
3670     my $ipset_ruleset = {};
3671
3672     # generate ipsets for QEMU VMs
3673     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3674         eval {
3675             my $conf = $vmdata->{qemu}->{$vmid};
3676             my $vmfw_conf = $vmfw_configs->{$vmid};
3677             return if !$vmfw_conf;
3678
3679             # When the 'ipfilter' option is enabled every device for which there
3680             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3681             # ipset.
3682             # The reason is that ipfilter ipsets are always filled with standard
3683             # IPv6 link-local filters.
3684             my $ipsets = $vmfw_conf->{ipset};
3685             my $implicit_sets = {};
3686
3687             my $device_ips = {};
3688             foreach my $netid (keys %$conf) {
3689                 next if $netid !~ m/^net(\d+)$/;
3690                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3691                 next if !$net->{firewall};
3692
3693                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3694                     $implicit_sets->{"ipfilter-$netid"} = [];
3695                 }
3696
3697                 my $macaddr = $net->{macaddr};
3698                 my $linklocal = mac_to_linklocal($macaddr);
3699                 $device_ips->{$netid} = [
3700                     { cidr => $linklocal },
3701                     { cidr => 'fe80::/10', nomatch => 1 }
3702                 ];
3703             }
3704
3705             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3706             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3707         };
3708         warn $@ if $@; # just to be sure - should not happen
3709     }
3710
3711     # generate firewall rules for LXC containers
3712     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3713         eval {
3714             my $conf = $vmdata->{lxc}->{$vmid};
3715             my $vmfw_conf = $vmfw_configs->{$vmid};
3716             return if !$vmfw_conf;
3717
3718             # When the 'ipfilter' option is enabled every device for which there
3719             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3720             # ipset.
3721             # The reason is that ipfilter ipsets are always filled with standard
3722             # IPv6 link-local filters, as well as the IP addresses configured
3723             # for the container.
3724             my $ipsets = $vmfw_conf->{ipset};
3725             my $implicit_sets = {};
3726
3727             my $device_ips = {};
3728             foreach my $netid (keys %$conf) {
3729                 next if $netid !~ m/^net(\d+)$/;
3730                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3731                 next if !$net->{firewall};
3732
3733                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3734                     $implicit_sets->{"ipfilter-$netid"} = [];
3735                 }
3736
3737                 my $macaddr = $net->{hwaddr};
3738                 my $linklocal = mac_to_linklocal($macaddr);
3739                 my $set = $device_ips->{$netid} = [
3740                     { cidr => $linklocal },
3741                     { cidr => 'fe80::/10', nomatch => 1 }
3742                 ];
3743                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3744                     push @$set, { cidr => $1 };
3745                 }
3746                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3747                     push @$set, { cidr => $1 };
3748                 }
3749             }
3750
3751             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3752             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3753         };
3754         warn $@ if $@; # just to be sure - should not happen
3755     }
3756
3757     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3758
3759     return $ipset_ruleset;
3760 }
3761
3762 sub compile_ebtables_filter {
3763     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3764
3765     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3766         return {};
3767     }
3768
3769     my $ruleset = {};
3770
3771     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3772
3773     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3774     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3775     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3776     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3777     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3778
3779     # generate firewall rules for QEMU VMs
3780     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3781         eval {
3782             my $conf = $vmdata->{qemu}->{$vmid};
3783             my $vmfw_conf = $vmfw_configs->{$vmid};
3784             return if !$vmfw_conf;
3785             my $ipsets = $vmfw_conf->{ipset};
3786
3787             foreach my $netid (sort keys %$conf) {
3788                 next if $netid !~ m/^net(\d+)$/;
3789                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3790                 next if !$net->{firewall};
3791                 my $iface = "tap${vmid}i$1";
3792                 my $macaddr = $net->{macaddr};
3793                 my $arpfilter = [];
3794                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3795                     foreach my $ipaddr (@$ipset) {
3796                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3797                         next if !$ip || ($version && $version != 4);
3798                         push(@$arpfilter, $ip);
3799                     }
3800                 }
3801                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3802             }
3803         };
3804         warn $@ if $@; # just to be sure - should not happen
3805     }
3806
3807     # generate firewall rules for LXC containers
3808     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3809         eval {
3810             my $conf = $vmdata->{lxc}->{$vmid};
3811
3812             my $vmfw_conf = $vmfw_configs->{$vmid};
3813             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3814             my $ipsets = $vmfw_conf->{ipset};
3815
3816             foreach my $netid (sort keys %$conf) {
3817                 next if $netid !~ m/^net(\d+)$/;
3818                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3819                 next if !$net->{firewall};
3820                 my $iface = "veth${vmid}i$1";
3821                 my $macaddr = $net->{hwaddr};
3822                 my $arpfilter = [];
3823                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3824                     foreach my $ipaddr (@$ipset) {
3825                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3826                         next if !$ip || ($version && $version != 4);
3827                         push(@$arpfilter, $ip);
3828                     }
3829                 }
3830                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3831                     # ebtables changes this to a .0/MASK network but we just
3832                     # want the address here, no network - see #2193
3833                     $ip =~ s|/(\d+)$||;
3834                     push @$arpfilter, $ip;
3835                 }
3836                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3837             }
3838         };
3839         warn $@ if $@; # just to be sure - should not happen
3840     }
3841
3842     return $ruleset;
3843 }
3844
3845 sub generate_tap_layer2filter {
3846     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3847     my $options = $vmfw_conf->{options};
3848
3849     my $tapchain = $iface."-OUT";
3850
3851     # ebtables remove zeros from mac pairs
3852     $macaddr =~ s/0([0-9a-f])/$1/ig;
3853     $macaddr = lc($macaddr);
3854
3855     ruleset_create_chain($ruleset, $tapchain);
3856
3857     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3858             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3859     }
3860
3861     if (@$arpfilter){
3862         my $arpchain = $tapchain."-ARP";
3863         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3864         ruleset_create_chain($ruleset, $arpchain);
3865
3866         foreach my $ip (@{$arpfilter}) {
3867             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3868         }
3869         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3870     }
3871
3872     if (defined($options->{layer2_protocols})){
3873         my $protochain = $tapchain."-PROTO";
3874         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3875         ruleset_create_chain($ruleset, $protochain);
3876
3877         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3878             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3879         }
3880         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3881     }
3882
3883     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3884
3885     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3886 }
3887
3888 # the parameter $change_only_regex changes two things if defined:
3889 # * all chains not matching it will be left intact
3890 # * both the $active_chains hash and the returned status_hash have different
3891 #   structure (they contain a key named 'rules').
3892 sub get_ruleset_status {
3893     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3894
3895     my $statushash = {};
3896
3897     foreach my $chain (sort keys %$ruleset) {
3898         my $rules = $ruleset->{$chain};
3899         my $sig = &$digest_fn($rules);
3900         my $oldsig;
3901
3902         $statushash->{$chain}->{sig} = $sig;
3903         if (defined($change_only_regex)) {
3904             $oldsig = $active_chains->{$chain}->{sig};
3905             $statushash->{$chain}->{rules} = $rules;
3906         } else {
3907             $oldsig = $active_chains->{$chain};
3908         }
3909         if (!defined($oldsig)) {
3910             $statushash->{$chain}->{action} = 'create';
3911         } else {
3912             if ($oldsig eq $sig) {
3913                 $statushash->{$chain}->{action} = 'exists';
3914             } else {
3915                 $statushash->{$chain}->{action} = 'update';
3916             }
3917         }
3918         if ($verbose) {
3919             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3920             foreach my $cmd (@{$rules}) {
3921                 print "\t$cmd\n";
3922             }
3923         }
3924     }
3925
3926     foreach my $chain (sort keys %$active_chains) {
3927         next if defined($ruleset->{$chain});
3928         my $action = 'delete';
3929         my $sig = $active_chains->{$chain};
3930         if (defined($change_only_regex)) {
3931             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3932             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3933             $sig = $sig->{sig};
3934         }
3935         $statushash->{$chain}->{action} = $action;
3936         $statushash->{$chain}->{sig} = $sig;
3937         print "$action $chain ($sig)\n" if $verbose;
3938     }
3939
3940     return $statushash;
3941 }
3942
3943 sub print_sig_rule {
3944     my ($chain, $sig) = @_;
3945
3946     # We just use this to store a SHA1 checksum used to detect changes
3947     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3948 }
3949
3950 sub get_ruleset_cmdlist {
3951     my ($ruleset, $iptablescmd) = @_;
3952
3953     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3954
3955     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3956     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3957
3958     # create missing chains first
3959     foreach my $chain (sort keys %$ruleset) {
3960         my $stat = $statushash->{$chain};
3961         die "internal error" if !$stat;
3962         next if $stat->{action} ne 'create';
3963
3964         $cmdlist .= ":$chain - [0:0]\n";
3965     }
3966
3967     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3968         my $chain = "PVEFW-$h";
3969         if ($ruleset->{$chain} && !$hooks->{$h}) {
3970             $cmdlist .= "-A $h -j $chain\n";
3971         }
3972     }
3973
3974     foreach my $chain (sort keys %$ruleset) {
3975         my $stat = $statushash->{$chain};
3976         die "internal error" if !$stat;
3977
3978         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3979             $cmdlist .= "-F $chain\n";
3980             foreach my $cmd (@{$ruleset->{$chain}}) {
3981                 $cmdlist .= "$cmd\n";
3982             }
3983             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3984         } elsif ($stat->{action} eq 'delete') {
3985             die "internal error"; # this should not happen
3986         } elsif ($stat->{action} eq 'exists') {
3987             # do nothing
3988         } else {
3989             die "internal error - unknown status '$stat->{action}'";
3990         }
3991     }
3992
3993     foreach my $chain (keys %$statushash) {
3994         next if $statushash->{$chain}->{action} ne 'delete';
3995         $cmdlist .= "-F $chain\n";
3996     }
3997     foreach my $chain (keys %$statushash) {
3998         next if $statushash->{$chain}->{action} ne 'delete';
3999         next if $chain eq 'PVEFW-INPUT';
4000         next if $chain eq 'PVEFW-OUTPUT';
4001         next if $chain eq 'PVEFW-FORWARD';
4002         $cmdlist .= "-X $chain\n";
4003     }
4004
4005     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
4006
4007     $cmdlist .= "COMMIT\n";
4008
4009     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4010 }
4011
4012 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4013
4014 sub get_ebtables_cmdlist {
4015     my ($ruleset) = @_;
4016
4017     my $changes = 0;
4018     my $cmdlist = "*filter\n";
4019
4020     my $active_chains = ebtables_get_chains();
4021     my $statushash = get_ruleset_status($ruleset, $active_chains,
4022                                         \&iptables_chain_digest,
4023                                         $pve_ebtables_chainname_regex);
4024
4025     # create chains first and make sure PVE rules are evaluated if active
4026     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4027     my $pve_include = 0;
4028     foreach my $chain (sort keys %$statushash) {
4029         next if ($statushash->{$chain}->{action} eq 'delete');
4030         $cmdlist .= ":$chain ACCEPT\n";
4031         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4032     }
4033
4034     foreach my $chain (sort keys %$statushash) {
4035         my $stat = $statushash->{$chain};
4036         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4037         next if ($stat->{action} eq 'delete');
4038
4039         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4040             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4041                 next if ! $pve_include;
4042                 $pve_include = 0;
4043             }
4044             $cmdlist .= "$cmd\n";
4045         }
4046     }
4047     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4048
4049     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4050 }
4051
4052 sub get_ipset_cmdlist {
4053     my ($ruleset) = @_;
4054
4055     my $cmdlist = "";
4056
4057     my $delete_cmdlist = "";
4058
4059     my $active_chains = ipset_get_chains();
4060     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4061
4062     # remove stale _swap chains
4063     foreach my $chain (keys %$active_chains) {
4064         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4065             $cmdlist .= "destroy $chain\n";
4066         }
4067     }
4068
4069     foreach my $chain (keys %$ruleset) {
4070         my $stat = $statushash->{$chain};
4071         die "internal error" if !$stat;
4072
4073         if ($stat->{action} eq 'create') {
4074             foreach my $cmd (@{$ruleset->{$chain}}) {
4075                 $cmdlist .= "$cmd\n";
4076             }
4077         }
4078     }
4079
4080     foreach my $chain (keys %$ruleset) {
4081         my $stat = $statushash->{$chain};
4082         die "internal error" if !$stat;
4083
4084         if ($stat->{action} eq 'update') {
4085             my $chain_swap = $chain."_swap";
4086
4087             foreach my $cmd (@{$ruleset->{$chain}}) {
4088                 $cmd =~ s/$chain/$chain_swap/;
4089                 $cmdlist .= "$cmd\n";
4090             }
4091             $cmdlist .= "swap $chain_swap $chain\n";
4092             $cmdlist .= "flush $chain_swap\n";
4093             $cmdlist .= "destroy $chain_swap\n";
4094         }
4095     }
4096
4097      # the remove unused chains
4098     foreach my $chain (keys %$statushash) {
4099         next if $statushash->{$chain}->{action} ne 'delete';
4100
4101         $delete_cmdlist .= "flush $chain\n";
4102         $delete_cmdlist .= "destroy $chain\n";
4103     }
4104
4105     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4106
4107     return ($cmdlist, $delete_cmdlist, $changes);
4108 }
4109
4110 sub apply_ruleset {
4111     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4112
4113     enable_bridge_firewall();
4114
4115     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4116         get_ipset_cmdlist($ipset_ruleset);
4117
4118     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset);
4119     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, "ip6tables");
4120     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4121
4122     if ($verbose) {
4123         if ($ipset_changes) {
4124             print "ipset changes:\n";
4125             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4126             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4127         }
4128
4129         if ($changes) {
4130             print "iptables changes:\n";
4131             print $cmdlist;
4132         }
4133
4134         if ($changesv6) {
4135             print "ip6tables changes:\n";
4136             print $cmdlistv6;
4137         }
4138
4139         if ($ebtables_changes) {
4140             print "ebtables changes:\n";
4141             print $ebtables_cmdlist;
4142         }
4143     }
4144
4145     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4146     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4147
4148     ipset_restore_cmdlist($ipset_create_cmdlist);
4149
4150     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4151     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4152
4153     iptables_restore_cmdlist($cmdlist);
4154
4155     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4156     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4157
4158     ip6tables_restore_cmdlist($cmdlistv6);
4159
4160     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4161     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4162
4163     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4164
4165     ebtables_restore_cmdlist($ebtables_cmdlist);
4166
4167     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4168     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4169
4170     # test: re-read status and check if everything is up to date
4171     my $active_chains = iptables_get_chains();
4172     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4173
4174     my $errors;
4175     foreach my $chain (sort keys %$ruleset) {
4176         my $stat = $statushash->{$chain};
4177         if ($stat->{action} ne 'exists') {
4178             warn "unable to update chain '$chain'\n";
4179             $errors = 1;
4180         }
4181     }
4182
4183     my $active_chainsv6 = iptables_get_chains("ip6tables");
4184     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest);
4185
4186     foreach my $chain (sort keys %$rulesetv6) {
4187         my $stat = $statushashv6->{$chain};
4188         if ($stat->{action} ne 'exists') {
4189             warn "unable to update chain '$chain'\n";
4190             $errors = 1;
4191         }
4192     }
4193
4194     my $active_ebtables_chains = ebtables_get_chains();
4195     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4196                                 $active_ebtables_chains, \&iptables_chain_digest,
4197                                 $pve_ebtables_chainname_regex);
4198
4199     foreach my $chain (sort keys %$ebtables_ruleset) {
4200         my $stat = $ebtables_statushash->{$chain};
4201         if ($stat->{action} ne 'exists') {
4202             warn "ebtables : unable to update chain '$chain'\n";
4203             $errors = 1;
4204         }
4205     }
4206
4207     die "unable to apply firewall changes\n" if $errors;
4208
4209     update_nf_conntrack_max($hostfw_conf);
4210
4211     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4212
4213     update_nf_conntrack_logging($hostfw_conf);
4214 }
4215
4216 sub update_nf_conntrack_max {
4217     my ($hostfw_conf) = @_;
4218
4219     my $max = 65536; # reasonable default
4220
4221     my $options = $hostfw_conf->{options} || {};
4222
4223     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4224         $max = $options->{nf_conntrack_max};
4225         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4226     }
4227
4228     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4229     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4230
4231     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4232
4233     if ($current != $max) {
4234         my $hashsize = int($max/4);
4235         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4236         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4237     }
4238 }
4239
4240 sub update_nf_conntrack_tcp_timeout_established {
4241     my ($hostfw_conf) = @_;
4242
4243     my $options = $hostfw_conf->{options} || {};
4244
4245     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4246
4247     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4248 }
4249
4250 my $log_nf_conntrack_enabled = undef;
4251 sub update_nf_conntrack_logging {
4252     my ($hostfw_conf) = @_;
4253
4254     my $options = $hostfw_conf->{options} || {};
4255     my $value = $options->{log_nf_conntrack} || 0;
4256     if (!defined($log_nf_conntrack_enabled)
4257         || $value != $log_nf_conntrack_enabled)
4258     {
4259         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4260         PVE::Tools::file_set_contents($tmpfile, $value);
4261
4262         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4263         $log_nf_conntrack_enabled = $value;
4264     }
4265 }
4266
4267 sub remove_pvefw_chains {
4268
4269     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4270     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4271     PVE::Firewall::remove_pvefw_chains_ipset();
4272     PVE::Firewall::remove_pvefw_chains_ebtables();
4273
4274 }
4275
4276 sub remove_pvefw_chains_iptables {
4277     my ($iptablescmd) = @_;
4278
4279     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4280     my $cmdlist = "*filter\n";
4281
4282     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4283         if ($hooks->{$h}) {
4284             $cmdlist .= "-D $h -j PVEFW-$h\n";
4285         }
4286     }
4287
4288     foreach my $chain (keys %$chash) {
4289         $cmdlist .= "-F $chain\n";
4290     }
4291
4292     foreach my $chain (keys %$chash) {
4293         $cmdlist .= "-X $chain\n";
4294     }
4295     $cmdlist .= "COMMIT\n";
4296
4297     if($iptablescmd eq "ip6tables") {
4298         ip6tables_restore_cmdlist($cmdlist);
4299     } else {
4300         iptables_restore_cmdlist($cmdlist);
4301     }
4302 }
4303
4304 sub remove_pvefw_chains_ipset {
4305
4306     my $ipset_chains = ipset_get_chains();
4307
4308     my $cmdlist = "";
4309
4310     foreach my $chain (keys %$ipset_chains) {
4311         $cmdlist .= "flush $chain\n";
4312         $cmdlist .= "destroy $chain\n";
4313     }
4314
4315     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4316 }
4317
4318 sub remove_pvefw_chains_ebtables {
4319     # apply empty ruleset = remove all our chains
4320     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4321 }
4322
4323 sub init {
4324     my $cluster_conf = load_clusterfw_conf();
4325     my $cluster_options = $cluster_conf->{options};
4326     my $enable = $cluster_options->{enable};
4327
4328     return if !$enable;
4329
4330     # load required modules here
4331 }
4332
4333 sub update {
4334     my $code = sub {
4335
4336         my $cluster_conf = load_clusterfw_conf();
4337         my $cluster_options = $cluster_conf->{options};
4338
4339         if (!$cluster_options->{enable}) {
4340             PVE::Firewall::remove_pvefw_chains();
4341             return;
4342         }
4343
4344         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4345
4346         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4347
4348         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4349     };
4350
4351     run_locked($code);
4352 }
4353
4354 1;