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         default => 0,
1260         optional => 1,
1261     },
1262     nf_conntrack_max => {
1263         description => "Maximum number of tracked connections.",
1264         type => 'integer',
1265         optional => 1,
1266         default => 262144,
1267         minimum => 32768,
1268     },
1269     nf_conntrack_tcp_timeout_established => {
1270         description => "Conntrack established timeout.",
1271         type => 'integer',
1272         optional => 1,
1273         default => 432000,
1274         minimum => 7875,
1275     },
1276     ndp => {
1277         description => "Enable NDP (Neighbor Discovery Protocol).",
1278         type => 'boolean',
1279         default => 0,
1280         optional => 1,
1281     },
1282     nf_conntrack_allow_invalid => {
1283         description => "Allow invalid packets on connection tracking.",
1284         type => 'boolean',
1285         default => 0,
1286         optional => 1,
1287     },
1288     log_nf_conntrack => {
1289         description => "Enable logging of conntrack information.",
1290         type => 'boolean',
1291         default => 0,
1292         optional => 1
1293     },
1294 };
1295
1296 our $vm_option_properties = {
1297     enable => {
1298         description => "Enable/disable firewall rules.",
1299         type => 'boolean',
1300         default => 0,
1301         optional => 1,
1302     },
1303     macfilter => {
1304         description => "Enable/disable MAC address filter.",
1305         type => 'boolean',
1306         default => 0,
1307         optional => 1,
1308     },
1309     dhcp => {
1310         description => "Enable DHCP.",
1311         type => 'boolean',
1312         default => 0,
1313         optional => 1,
1314     },
1315     ndp => {
1316         description => "Enable NDP (Neighbor Discovery Protocol).",
1317         type => 'boolean',
1318         default => 0,
1319         optional => 1,
1320     },
1321     radv => {
1322         description => "Allow sending Router Advertisement.",
1323         type => 'boolean',
1324         optional => 1,
1325     },
1326     ipfilter => {
1327         description => "Enable default IP filters. " .
1328            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1329            "for every interface. Such ipsets implicitly contain sane default " .
1330            "restrictions such as restricting IPv6 link local addresses to " .
1331            "the one derived from the interface's MAC address. For containers " .
1332            "the configured IP addresses will be implicitly added.",
1333         type => 'boolean',
1334         optional => 1,
1335     },
1336     policy_in => {
1337         description => "Input policy.",
1338         type => 'string',
1339         optional => 1,
1340         enum => ['ACCEPT', 'REJECT', 'DROP'],
1341     },
1342     policy_out => {
1343         description => "Output policy.",
1344         type => 'string',
1345         optional => 1,
1346         enum => ['ACCEPT', 'REJECT', 'DROP'],
1347     },
1348     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1349         description => "Log level for incoming traffic." }),
1350     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1351         description => "Log level for outgoing traffic." }),
1352
1353 };
1354
1355
1356 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.";
1357
1358 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.";
1359
1360 my $rule_properties = {
1361     pos => {
1362         description => "Update rule at position <pos>.",
1363         type => 'integer',
1364         minimum => 0,
1365         optional => 1,
1366     },
1367     digest => get_standard_option('pve-config-digest'),
1368     type => {
1369         description => "Rule type.",
1370         type => 'string',
1371         optional => 1,
1372         enum => ['in', 'out', 'group'],
1373     },
1374     action => {
1375         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1376         type => 'string',
1377         optional => 1,
1378         pattern => $security_group_name_pattern,
1379         maxLength => 20,
1380         minLength => 2,
1381     },
1382     macro => {
1383         description => "Use predefined standard macro.",
1384         type => 'string',
1385         optional => 1,
1386         maxLength => 128,
1387     },
1388     iface => get_standard_option('pve-iface', {
1389         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.",
1390         optional => 1
1391     }),
1392     source => {
1393         description => "Restrict packet source address. $addr_list_descr",
1394         type => 'string', format => 'pve-fw-addr-spec',
1395         optional => 1,
1396     },
1397     dest => {
1398         description => "Restrict packet destination address. $addr_list_descr",
1399         type => 'string', format => 'pve-fw-addr-spec',
1400         optional => 1,
1401     },
1402     proto => {
1403         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1404         type => 'string', format => 'pve-fw-protocol-spec',
1405         optional => 1,
1406     },
1407     enable => {
1408         description => "Flag to enable/disable a rule.",
1409         type => 'integer',
1410         minimum => 0,
1411         optional => 1,
1412     },
1413     log => get_standard_option('pve-fw-loglevel', {
1414         description => "Log level for firewall rule.",
1415     }),
1416     sport => {
1417         description => "Restrict TCP/UDP source port. $port_descr",
1418         type => 'string', format => 'pve-fw-sport-spec',
1419         optional => 1,
1420     },
1421     dport => {
1422         description => "Restrict TCP/UDP destination port. $port_descr",
1423         type => 'string', format => 'pve-fw-dport-spec',
1424         optional => 1,
1425     },
1426     comment => {
1427         description => "Descriptive comment.",
1428         type => 'string',
1429         optional => 1,
1430     },
1431 };
1432
1433 sub add_rule_properties {
1434     my ($properties) = @_;
1435
1436     foreach my $k (keys %$rule_properties) {
1437         my $h = $rule_properties->{$k};
1438         # copy data, so that we can modify later without side effects
1439         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1440     }
1441
1442     return $properties;
1443 }
1444
1445 sub delete_rule_properties {
1446     my ($rule, $delete_str) = @_;
1447
1448     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1449         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1450             if !defined($rule_properties->{$opt});
1451         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1452             if $opt eq 'type' || $opt eq 'action';
1453         delete $rule->{$opt};
1454     }
1455
1456     return $rule;
1457 }
1458
1459 my $apply_macro = sub {
1460     my ($macro_name, $param, $verify, $ipversion) = @_;
1461
1462     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1463     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1464
1465     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1466         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1467     }
1468
1469     # skip macros which are specific to another ipversion
1470     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1471         return if $ipversion != $required;
1472     }
1473
1474     my $rules = [];
1475
1476     foreach my $templ (@$macro_rules) {
1477         my $rule = {};
1478         my $param_used = {};
1479         foreach my $k (keys %$templ) {
1480             my $v = $templ->{$k};
1481             if ($v eq 'PARAM') {
1482                 $v = $param->{$k};
1483                 $param_used->{$k} = 1;
1484             } elsif ($v eq 'DEST') {
1485                 $v = $param->{dest};
1486                 $param_used->{dest} = 1;
1487             } elsif ($v eq 'SOURCE') {
1488                 $v = $param->{source};
1489                 $param_used->{source} = 1;
1490             }
1491
1492             if (!defined($v)) {
1493                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1494                 raise_param_exc({ macro => $msg }) if $verify;
1495                 die "$msg\n";
1496             }
1497             $rule->{$k} = $v;
1498         }
1499         foreach my $k (keys %$param) {
1500             next if $k eq 'macro';
1501             next if !defined($param->{$k});
1502             next if $param_used->{$k};
1503             if (defined($rule->{$k})) {
1504                 if ($rule->{$k} ne $param->{$k}) {
1505                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1506                     raise_param_exc({ $k => $msg }) if $verify;
1507                     die "$msg\n";
1508                 }
1509             } else {
1510                 $rule->{$k} = $param->{$k};
1511             }
1512         }
1513         push @$rules, $rule;
1514     }
1515
1516     return $rules;
1517 };
1518
1519 my $rule_env_iface_lookup = {
1520     'ct' => 1,
1521     'vm' => 1,
1522     'group' => 0,
1523     'cluster' => 1,
1524     'host' => 1,
1525 };
1526
1527 sub verify_rule {
1528     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1529
1530     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1531
1532     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1533     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1534
1535     my $errors = $rule->{errors} || {};
1536
1537     my $error_count = 0;
1538
1539     my $add_error = sub {
1540         my ($param, $msg)  = @_;
1541         chomp $msg;
1542         raise_param_exc({ $param => $msg }) if !$noerr;
1543         $error_count++;
1544         $errors->{$param} = $msg if !$errors->{$param};
1545     };
1546
1547     my $ipversion;
1548     my $set_ip_version = sub {
1549         my $vers = shift;
1550         if ($vers) {
1551             die "detected mixed ipv4/ipv6 adresses in rule\n"
1552                 if $ipversion && ($vers != $ipversion);
1553             $ipversion = $vers;
1554         }
1555     };
1556
1557     my $check_ipset_or_alias_property = sub {
1558         my ($name, $expected_ipversion) = @_;
1559
1560         if (my $value = $rule->{$name}) {
1561             if ($value =~ m/^\+/) {
1562                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1563                     &$add_error($name, "no such ipset '$1'")
1564                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1565
1566                 } else {
1567                     &$add_error($name, "invalid ipset name '$value'");
1568                 }
1569             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1570                 my $alias = lc($value);
1571                 &$add_error($name, "no such alias '$value'")
1572                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1573                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1574                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1575
1576                 &$set_ip_version($e->{ipversion});
1577             }
1578         }
1579     };
1580
1581     my $type = $rule->{type};
1582     my $action = $rule->{action};
1583
1584     &$add_error('type', "missing property") if !$type;
1585     &$add_error('action', "missing property") if !$action;
1586
1587     if ($type) {
1588         if ($type eq  'in' || $type eq 'out') {
1589             &$add_error('action', "unknown action '$action'")
1590                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1591         } elsif ($type eq 'group') {
1592             &$add_error('type', "security groups not allowed")
1593                 if !$allow_groups;
1594             &$add_error('action', "invalid characters in security group name")
1595                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1596         } else {
1597             &$add_error('type', "unknown rule type '$type'");
1598         }
1599     }
1600
1601     if ($rule->{iface}) {
1602         &$add_error('type', "parameter -i not allowed for this rule type")
1603             if !$allow_iface;
1604         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1605         &$add_error('iface', $@) if $@;
1606         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1607             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1608                 if $rule->{iface} !~  m/^net(\d+)$/;
1609         }
1610     }
1611
1612     if ($rule->{macro}) {
1613         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1614             $rule->{macro} = $preferred_name;
1615         } else {
1616             &$add_error('macro', "unknown macro '$rule->{macro}'");
1617         }
1618     }
1619
1620     if ($rule->{proto}) {
1621         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1622         &$add_error('proto', $@) if $@;
1623         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1624         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1625     }
1626
1627     if ($rule->{dport}) {
1628         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1629         &$add_error('dport', $@) if $@;
1630         my $proto = $rule->{proto};
1631         &$add_error('proto', "missing property - 'dport' requires this property")
1632             if !$proto;
1633         &$add_error('dport', "protocol '$proto' does not support ports")
1634             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1635                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1636     }
1637
1638     if ($rule->{sport}) {
1639         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1640         &$add_error('sport', $@) if $@;
1641         my $proto = $rule->{proto};
1642         &$add_error('proto', "missing property - 'sport' requires this property")
1643             if !$proto;
1644         &$add_error('sport', "protocol '$proto' does not support ports")
1645             if !$PROTOCOLS_WITH_PORTS->{$proto};
1646     }
1647
1648     if ($rule->{source}) {
1649         eval {
1650             my $source_ipversion = parse_address_list($rule->{source});
1651             &$set_ip_version($source_ipversion);
1652         };
1653         &$add_error('source', $@) if $@;
1654         &$check_ipset_or_alias_property('source', $ipversion);
1655     }
1656
1657     if ($rule->{dest}) {
1658         eval {
1659             my $dest_ipversion = parse_address_list($rule->{dest});
1660             &$set_ip_version($dest_ipversion);
1661         };
1662         &$add_error('dest', $@) if $@;
1663         &$check_ipset_or_alias_property('dest', $ipversion);
1664     }
1665
1666     $rule->{ipversion} = $ipversion if $ipversion;
1667
1668     if ($rule->{macro} && !$error_count) {
1669         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1670         if (my $err = $@) {
1671             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1672                 my $eh = $err->{errors};
1673                 foreach my $p (keys %$eh) {
1674                     &$add_error($p, $eh->{$p});
1675                 }
1676             } else {
1677                 &$add_error('macro', "$err");
1678             }
1679         }
1680     }
1681
1682     $rule->{errors} = $errors if $error_count;
1683
1684     return $rule;
1685 }
1686
1687 sub copy_rule_data {
1688     my ($rule, $param) = @_;
1689
1690     foreach my $k (keys %$rule_properties) {
1691         if (defined(my $v = $param->{$k})) {
1692             if ($v eq '' || $v eq '-') {
1693                 delete $rule->{$k};
1694             } else {
1695                 $rule->{$k} = $v;
1696             }
1697         }
1698     }
1699
1700     return $rule;
1701 }
1702
1703 sub rules_modify_permissions {
1704     my ($rule_env) = @_;
1705
1706     if ($rule_env eq 'host') {
1707         return {
1708             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1709         };
1710     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1711         return {
1712             check => ['perm', '/', [ 'Sys.Modify' ]],
1713         };
1714     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1715         return {
1716             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1717         }
1718     }
1719
1720     return undef;
1721 }
1722
1723 sub rules_audit_permissions {
1724     my ($rule_env) = @_;
1725
1726     if ($rule_env eq 'host') {
1727         return {
1728             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1729         };
1730     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1731         return {
1732             check => ['perm', '/', [ 'Sys.Audit' ]],
1733         };
1734     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1735         return {
1736             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1737         }
1738     }
1739
1740     return undef;
1741 }
1742
1743 # core functions
1744 my $bridge_firewall_enabled = 0;
1745
1746 sub enable_bridge_firewall {
1747
1748     return if $bridge_firewall_enabled; # only once
1749
1750     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1751     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1752
1753     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1754     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1755
1756     $bridge_firewall_enabled = 1;
1757 }
1758
1759 sub iptables_restore_cmdlist {
1760     my ($cmdlist, $table) = @_;
1761
1762     $table = 'filter' if !$table;
1763     run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1764 }
1765
1766 sub ip6tables_restore_cmdlist {
1767     my ($cmdlist, $table) = @_;
1768
1769     $table = 'filter' if !$table;
1770     run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1771 }
1772
1773 sub ipset_restore_cmdlist {
1774     my ($cmdlist) = @_;
1775
1776     run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1777 }
1778
1779 sub ebtables_restore_cmdlist {
1780     my ($cmdlist) = @_;
1781
1782     run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1783 }
1784
1785 sub iptables_get_chains {
1786     my ($iptablescmd, $t) = @_;
1787
1788     $iptablescmd = "iptables" if !$iptablescmd;
1789     $t = 'filter' if !$t;
1790
1791     my $res = {};
1792
1793     # check what chains we want to track
1794     my $is_pvefw_chain = sub {
1795         my $name = shift;
1796
1797         return 1 if $name =~ m/^PVEFW-\S+$/;
1798
1799         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1800
1801         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1802
1803         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1804         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1805
1806         return undef;
1807     };
1808
1809     my $table = '';
1810
1811     my $hooks = {};
1812
1813     my $parser = sub {
1814         my $line = shift;
1815
1816         return if $line =~ m/^#/;
1817         return if $line =~ m/^\s*$/;
1818
1819         if ($line =~ m/^\*(\S+)$/) {
1820             $table = $1;
1821             return;
1822         }
1823
1824         return if $table ne $t;
1825
1826         if ($line =~ m/^:(\S+)\s/) {
1827             my $chain = $1;
1828             return if !&$is_pvefw_chain($chain);
1829             $res->{$chain} = "unknown";
1830         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1831             my ($chain, $sig) = ($1, $2);
1832             return if !&$is_pvefw_chain($chain);
1833             $res->{$chain} = $sig;
1834         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1835             $hooks->{$1} = 1;
1836         } else {
1837             # simply ignore the rest
1838             return;
1839         }
1840     };
1841
1842     run_command(["$iptablescmd-save"], outfunc => $parser);
1843
1844     return wantarray ? ($res, $hooks) : $res;
1845 }
1846
1847 sub iptables_chain_digest {
1848     my ($rules) = @_;
1849     my $digest = Digest::SHA->new('sha1');
1850     foreach my $rule (@$rules) { # order is important
1851         $digest->add($rule);
1852     }
1853     return $digest->b64digest;
1854 }
1855
1856 sub ipset_chain_digest {
1857     my ($rules) = @_;
1858
1859     my $digest = Digest::SHA->new('sha1');
1860     foreach my $rule (sort @$rules) { # note: sorted
1861         $digest->add($rule);
1862     }
1863     return $digest->b64digest;
1864 }
1865
1866 sub ipset_get_chains {
1867
1868     my $res = {};
1869     my $chains = {};
1870
1871     my $parser = sub {
1872         my $line = shift;
1873
1874         return if $line =~ m/^#/;
1875         return if $line =~ m/^\s*$/;
1876         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1877             my $chain = $1;
1878             $line =~ s/\s+$//; # delete trailing white space
1879             push @{$chains->{$chain}}, $line;
1880         } else {
1881             # simply ignore the rest
1882             return;
1883         }
1884     };
1885
1886     run_command(['ipset', 'save'], outfunc => $parser);
1887
1888     # compute digest for each chain
1889     foreach my $chain (keys %$chains) {
1890         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1891     }
1892
1893     return $res;
1894 }
1895
1896 sub ebtables_get_chains {
1897
1898     my $res = {};
1899     my $chains = {};
1900     my $parser = sub {
1901         my $line = shift;
1902         return if $line =~ m/^#/;
1903         return if $line =~ m/^\s*$/;
1904         if ($line =~ m/^:(\S+)\s\S+$/) {
1905             # Make sure we know chains exist even if they're empty.
1906             $chains->{$1} //= [];
1907         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1908             my $chain = $1;
1909             $line =~ s/\s+$//;
1910             push @{$chains->{$chain}}, $line;
1911         } else {
1912             # simply ignore the rest
1913             return;
1914         }
1915     };
1916
1917     run_command(['ebtables-save'], outfunc => $parser);
1918     # compute digest for each chain and store rules as well
1919     foreach my $chain (keys %$chains) {
1920         $res->{$chain}->{rules} = $chains->{$chain};
1921         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1922     }
1923     return $res;
1924 }
1925
1926 # substitude action of rule according to action hash
1927 sub rule_substitude_action {
1928     my ($rule, $actions) = @_;
1929
1930     if (my $action = $rule->{action}) {
1931         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1932     }
1933 }
1934
1935 # generate a src or dst match
1936 # $dir(ection) is either d or s
1937 sub ipt_gen_src_or_dst_match {
1938     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1939
1940     my $srcdst;
1941     if ($dir eq 's') {
1942         $srcdst = "src";
1943     } elsif ($dir eq 'd') {
1944         $srcdst = "dst";
1945     } else {
1946         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1947     }
1948
1949     my $match;
1950     if ($adr =~ m/^\+/) {
1951         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1952             my $name = $1;
1953             my $ipset_chain;
1954             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1955                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1956             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1957                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1958             } else {
1959                 die "no such ipset '$name'\n";
1960             }
1961             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1962         } else {
1963             die "invalid security group name '$adr'\n";
1964         }
1965     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1966         my $alias = lc($adr);
1967         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1968         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1969         die "no such alias '$adr'\n" if !$e;
1970         $match = "-${dir} $e->{cidr}";
1971     } elsif ($adr =~ m/\-/){
1972         $match = "-m iprange --${srcdst}-range $adr";
1973     } else {
1974         $match = "-${dir} $adr";
1975     }
1976
1977     return $match;
1978 }
1979
1980 # convert a %rule to an array of iptables commands
1981 sub ipt_rule_to_cmds {
1982     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1983
1984     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1985
1986     my @match = ();
1987
1988     if (defined $rule->{match}) {
1989         push @match, $rule->{match};
1990     } else {
1991         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1992         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1993
1994         if ($rule->{source}) {
1995             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1996         }
1997         if ($rule->{dest}) {
1998             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1999         }
2000
2001         if (my $proto = $rule->{proto}) {
2002             push @match, "-p $proto";
2003
2004             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
2005             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
2006
2007             my $add_dport = sub {
2008                 return if !$rule->{dport};
2009
2010                 if ($proto eq 'icmp') {
2011                     # Note: we use dport to store --icmp-type
2012                     die "unknown icmp-type '$rule->{dport}'\n"
2013                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2014                     push @match, "-m icmp --icmp-type $rule->{dport}";
2015                 } elsif ($proto eq 'icmpv6') {
2016                     # Note: we use dport to store --icmpv6-type
2017                     die "unknown icmpv6-type '$rule->{dport}'\n"
2018                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2019                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2020                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2021                     die "protocol $proto does not have ports\n";
2022                 } elsif ($multidport) {
2023                     push @match, "--match multiport", "--dports $rule->{dport}";
2024                 } else {
2025                     push @match, "--dport $rule->{dport}";
2026                 }
2027             };
2028
2029             my $add_sport = sub {
2030                 return if !$rule->{sport};
2031
2032                 die "protocol $proto does not have ports\n"
2033                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2034                 if ($multisport) {
2035                     push @match, "--match multiport", "--sports $rule->{sport}";
2036                 } else {
2037                     push @match, "--sport $rule->{sport}";
2038                 }
2039             };
2040
2041             # order matters - single port before multiport!
2042             $add_dport->() if $multisport;
2043             $add_sport->();
2044             $add_dport->() if !$multisport;
2045         } elsif ($rule->{dport} || $rule->{sport}) {
2046             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2047             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2048         }
2049
2050         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2051     }
2052     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2053
2054     my $targetstr;
2055     if (defined $rule->{target}) {
2056         $targetstr = $rule->{target};
2057     } else {
2058         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2059         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2060         $targetstr = ($goto) ? "-g $action" : "-j $action";
2061     }
2062
2063     my @iptcmds;
2064     my $log = $rule->{log};
2065     if (defined($log) && $log ne 'nolog') {
2066         my $loglevel = $log_level_hash->{$log};
2067         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2068         push @iptcmds, "-A $chain $matchstr $logaction";
2069     }
2070     push @iptcmds, "-A $chain $matchstr $targetstr";
2071     return @iptcmds;
2072 }
2073
2074 sub ruleset_generate_rule {
2075     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2076
2077     my $rules;
2078
2079     if ($rule->{macro}) {
2080         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2081     } else {
2082         $rules = [ $rule ];
2083     }
2084
2085     # update all or nothing
2086     my @ipt_rule_cmds;
2087     foreach my $r (@$rules) {
2088         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2089     }
2090     foreach my $c (@ipt_rule_cmds) {
2091         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2092     }
2093 }
2094
2095 sub ruleset_create_chain {
2096     my ($ruleset, $chain) = @_;
2097
2098     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2099     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2100
2101     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2102
2103     $ruleset->{$chain} = [];
2104 }
2105
2106 sub ruleset_chain_exist {
2107     my ($ruleset, $chain) = @_;
2108
2109     return $ruleset->{$chain} ? 1 : undef;
2110 }
2111
2112 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2113 sub ruleset_add_ipt_cmd {
2114    my ($ruleset, $chain, $iptcmd) = @_;
2115
2116    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2117
2118    push @{$ruleset->{$chain}}, $iptcmd;
2119 }
2120
2121 sub ruleset_addrule {
2122     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2123
2124     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2125
2126     if ($log) {
2127         my $loglevel = $log_level_hash->{$log};
2128         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2129         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2130     }
2131     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2132     $match .= ' ' if length($match);
2133     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2134 }
2135
2136 sub ruleset_insertrule {
2137    my ($ruleset, $chain, $match, $action, $log) = @_;
2138
2139    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2140
2141    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2142 }
2143
2144 sub get_log_rule_base {
2145     my ($chain, $vmid, $msg, $loglevel) = @_;
2146
2147     $vmid = 0 if !defined($vmid);
2148     $msg = "" if !defined($msg);
2149
2150     my $rlimit = '';
2151     if (defined($global_log_ratelimit)) {
2152         $rlimit = "-m limit $global_log_ratelimit ";
2153     }
2154
2155     # Note: we use special format for prefix to pass further
2156     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2157     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2158 }
2159
2160 sub ruleset_add_chain_policy {
2161     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2162
2163     if ($policy eq 'ACCEPT') {
2164
2165         my $rule = { action => 'ACCEPT' };
2166         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2167         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2168
2169     } elsif ($policy eq 'DROP') {
2170
2171         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2172
2173         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2174     } elsif ($policy eq 'REJECT') {
2175         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2176
2177         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2178     } else {
2179         # should not happen
2180         die "internal error: unknown policy '$policy'";
2181     }
2182 }
2183
2184 sub ruleset_chain_add_ndp {
2185     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2186     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2187
2188     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2189     if ($direction ne 'OUT' || $options->{radv}) {
2190         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2191     }
2192     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2193     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2194 }
2195
2196 sub ruleset_chain_add_conn_filters {
2197     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2198
2199     if (!$allow_invalid) {
2200         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2201     }
2202     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2203 }
2204
2205 sub ruleset_chain_add_input_filters {
2206     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2207
2208     if ($cluster_conf->{ipset}->{blacklist}){
2209         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2210             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2211             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2212         }
2213         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2214         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2215     }
2216
2217     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2218         if ($ipversion == 4) {
2219             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2220         }
2221     }
2222
2223     if ($options->{tcpflags}) {
2224         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2225     }
2226 }
2227
2228 sub ruleset_create_vm_chain {
2229     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2230
2231     ruleset_create_chain($ruleset, $chain);
2232     my $accept = generate_nfqueue($options);
2233
2234     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2235         if ($ipversion == 4) {
2236             if ($direction eq 'OUT') {
2237                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2238                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2239                                         proto => 'udp', sport => 68, dport => 67 });
2240             } else {
2241                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2242                                       { action => 'ACCEPT',
2243                                         proto => 'udp', sport => 67, dport => 68 });
2244             }
2245         } elsif ($ipversion == 6) {
2246             if ($direction eq 'OUT') {
2247                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2248                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2249                                         proto => 'udp', sport => 546, dport => 547 });
2250             } else {
2251                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2252                                       { action => 'ACCEPT',
2253                                         proto => 'udp', sport => 547, dport => 546 });
2254             }
2255         }
2256
2257     }
2258
2259     if ($direction eq 'OUT') {
2260         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2261             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2262         }
2263         if ($ipversion == 6 && !$options->{radv}) {
2264             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2265         }
2266         if ($ipfilter_ipset) {
2267             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2268         }
2269         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2270     }
2271
2272     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2273     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2274 }
2275
2276 sub ruleset_add_group_rule {
2277     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2278
2279     my $group = $rule->{action};
2280     my $group_chain = "GROUP-$group-$direction";
2281     if(!ruleset_chain_exist($ruleset, $group_chain)){
2282         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2283     }
2284
2285     if ($direction eq 'OUT' && $rule->{iface_out}) {
2286         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2287     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2288         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2289     } else {
2290         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2291     }
2292
2293     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2294 }
2295
2296 sub ruleset_generate_vm_rules {
2297     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2298
2299     my $lc_direction = lc($direction);
2300
2301     my $in_accept = generate_nfqueue($options);
2302
2303     foreach my $rule (@$rules) {
2304         next if $rule->{iface} && $rule->{iface} ne $netid;
2305         next if !$rule->{enable} || $rule->{errors};
2306         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2307
2308         if ($rule->{type} eq 'group') {
2309             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2310                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2311         } else {
2312             next if $rule->{type} ne $lc_direction;
2313             eval {
2314                 $rule->{logmsg} = "$rule->{action}: ";
2315                 if ($direction eq 'OUT') {
2316                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2317                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2318                 } else {
2319                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2320                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2321                 }
2322             };
2323             warn $@ if $@;
2324         }
2325     }
2326 }
2327
2328 sub generate_nfqueue {
2329     my ($options) = @_;
2330
2331     if ($options->{ips}) {
2332         my $action = "NFQUEUE";
2333         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2334             if (defined($3) && defined($1)) {
2335                 $action .= " --queue-balance $1:$3";
2336             } elsif (defined($1)) {
2337                 $action .= " --queue-num $1";
2338             }
2339         }
2340         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2341         return $action;
2342     } else {
2343         return "ACCEPT";
2344     }
2345 }
2346
2347 sub ruleset_generate_vm_ipsrules {
2348     my ($ruleset, $options, $direction, $iface) = @_;
2349
2350     if ($options->{ips} && $direction eq 'IN') {
2351         my $nfqueue = generate_nfqueue($options);
2352
2353         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2354             ruleset_create_chain($ruleset, "PVEFW-IPS");
2355         }
2356
2357         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2358     }
2359 }
2360
2361 sub generate_tap_rules_direction {
2362     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2363
2364     my $lc_direction = lc($direction);
2365
2366     my $rules = $vmfw_conf->{rules};
2367
2368     my $options = $vmfw_conf->{options};
2369     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2370
2371     my $tapchain = "$iface-$direction";
2372
2373     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2374     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2375         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2376
2377     if ($options->{enable}) {
2378         # create chain with mac and ip filter
2379         ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2380
2381         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2382
2383         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2384
2385         # implement policy
2386         my $policy;
2387
2388         if ($direction eq 'OUT') {
2389             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2390         } else {
2391             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2392         }
2393
2394         my $accept = generate_nfqueue($options);
2395         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2396         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2397     } else {
2398         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2399         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2400     }
2401
2402     # plug the tap chain to bridge chain
2403     if ($direction eq 'IN') {
2404         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2405                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2406     } else {
2407         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2408                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2409     }
2410 }
2411
2412 sub enable_host_firewall {
2413     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2414
2415     my $options = $hostfw_conf->{options};
2416     my $cluster_options = $cluster_conf->{options};
2417     my $rules = $hostfw_conf->{rules};
2418     my $cluster_rules = $cluster_conf->{rules};
2419
2420     # corosync preparation
2421     my $corosync_rule = "-p udp --dport 5404:5405";
2422     my $corosync_local_addresses = {};
2423     my $multicast_enabled;
2424     my $local_hostname = PVE::INotify::nodename();
2425     if (defined($corosync_conf)) {
2426         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2427             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2428
2429             if ($node_name eq $local_hostname) {
2430                 $corosync_local_addresses->{$key} = $node_ip;
2431             }
2432         });
2433
2434         # allow multicast only if enabled in config
2435         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2436         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2437     }
2438
2439     # host inbound firewall
2440     my $chain = "PVEFW-HOST-IN";
2441     ruleset_create_chain($ruleset, $chain);
2442
2443     my $loglevel = get_option_log_level($options, "log_level_in");
2444
2445     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2446
2447     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2448     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2449     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2450
2451     # we use RETURN because we need to check also tap rules
2452     my $accept_action = 'RETURN';
2453
2454     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2455
2456     # add host rules first, so that cluster wide rules can be overwritten
2457     foreach my $rule (@$rules, @$cluster_rules) {
2458         next if !$rule->{enable} || $rule->{errors};
2459         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2460
2461         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2462
2463         eval {
2464             if ($rule->{type} eq 'group') {
2465                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2466             } elsif ($rule->{type} eq 'in') {
2467                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2468                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2469             }
2470         };
2471         warn $@ if $@;
2472         delete $rule->{iface_in};
2473     }
2474
2475     # allow standard traffic for management ipset (includes cluster network)
2476     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2477     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2478     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2479     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2480     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2481     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2482
2483     # corosync inbound rules
2484     if (defined($corosync_conf)) {
2485         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2486             if $multicast_enabled;
2487
2488         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2489             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2490             my $destination = $corosync_local_addresses->{$key};
2491
2492             if ($node_name ne $local_hostname && defined($destination)) {
2493                 # accept only traffic on same ring
2494                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2495             }
2496         });
2497     }
2498
2499     # implement input policy
2500     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2501     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2502
2503     # host outbound firewall
2504     $chain = "PVEFW-HOST-OUT";
2505     ruleset_create_chain($ruleset, $chain);
2506
2507     $loglevel = get_option_log_level($options, "log_level_out");
2508
2509     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2510
2511     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2512
2513     # we use RETURN because we may want to check other thigs later
2514     $accept_action = 'RETURN';
2515     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2516
2517     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2518
2519     # add host rules first, so that cluster wide rules can be overwritten
2520     foreach my $rule (@$rules, @$cluster_rules) {
2521         next if !$rule->{enable} || $rule->{errors};
2522         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2523
2524         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2525         eval {
2526             $rule->{logmsg} = "$rule->{action}: ";
2527             if ($rule->{type} eq 'group') {
2528                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2529             } elsif ($rule->{type} eq 'out') {
2530                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2531                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2532             }
2533         };
2534         warn $@ if $@;
2535         delete $rule->{iface_out};
2536     }
2537
2538     # allow standard traffic on cluster network
2539     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2540     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2541
2542     if ($localnet && ($ipversion == $localnet_ver)) {
2543         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2544         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2545         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2546         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2547     }
2548
2549     # corosync outbound rules
2550     if (defined($corosync_conf)) {
2551         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2552             if $multicast_enabled;
2553
2554         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2555             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2556             my $source = $corosync_local_addresses->{$key};
2557
2558             if ($node_name ne $local_hostname && defined($source)) {
2559                 # accept only traffic on same ring
2560                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2561             }
2562         });
2563     }
2564
2565     # implement output policy
2566     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2567     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2568
2569     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2570     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2571 }
2572
2573 sub generate_group_rules {
2574     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2575
2576     my $rules = $cluster_conf->{groups}->{$group};
2577
2578     if (!$rules) {
2579         warn "no such security group '$group'\n";
2580         $rules = []; # create empty chain
2581     }
2582
2583     my $chain = "GROUP-${group}-IN";
2584
2585     ruleset_create_chain($ruleset, $chain);
2586     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2587
2588     foreach my $rule (@$rules) {
2589         next if $rule->{type} ne 'in';
2590         next if !$rule->{enable} || $rule->{errors};
2591         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2592         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2593         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2594     }
2595
2596     $chain = "GROUP-${group}-OUT";
2597
2598     ruleset_create_chain($ruleset, $chain);
2599     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2600
2601     foreach my $rule (@$rules) {
2602         next if $rule->{type} ne 'out';
2603         next if !$rule->{enable} || $rule->{errors};
2604         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2605         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2606         # check also other tap rules later
2607         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2608         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2609     }
2610 }
2611
2612 my $MAX_NETS = 32;
2613 my $valid_netdev_names = {};
2614 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2615     $valid_netdev_names->{"net$i"} = 1;
2616 }
2617
2618 sub get_mark_values {
2619     my ($value, $mask) = @_;
2620     $value = hex($value) if $value =~ /^0x/;
2621     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2622     $mask = 0xffffffff if !defined($mask);
2623     return ($value, $mask);
2624 }
2625
2626 sub parse_fw_rule {
2627     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2628
2629     my $orig_line = $line;
2630
2631     my $rule = {};
2632
2633     # we can add single line comments to the end of the rule
2634     if ($line =~ s/#\s*(.*?)\s*$//) {
2635         $rule->{comment} = decode('utf8', $1);
2636     }
2637
2638     # we can disable a rule when prefixed with '|'
2639
2640     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2641
2642     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2643         die "unable to parse rule: $line\n";
2644
2645     $rule->{type} = lc($1);
2646     $rule->{action} = $2;
2647
2648     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2649         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2650             $rule->{macro} = $1;
2651             $rule->{action} = $2;
2652         }
2653     }
2654
2655     while (length($line)) {
2656         if ($line =~ s/^-i (\S+)\s*//) {
2657             $rule->{iface} = $1;
2658             next;
2659         }
2660
2661         last if $rule->{type} eq 'group';
2662
2663         if ($line =~ s/^-p (\S+)\s*//) {
2664             $rule->{proto} = $1;
2665             next;
2666         }
2667
2668         if ($line =~ s/^-dport (\S+)\s*//) {
2669             $rule->{dport} = $1;
2670             next;
2671         }
2672
2673         if ($line =~ s/^-sport (\S+)\s*//) {
2674             $rule->{sport} = $1;
2675             next;
2676         }
2677         if ($line =~ s/^-source (\S+)\s*//) {
2678             $rule->{source} = $1;
2679             next;
2680         }
2681         if ($line =~ s/^-dest (\S+)\s*//) {
2682             $rule->{dest} = $1;
2683             next;
2684         }
2685         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2686             $rule->{log} = $1;
2687             next;
2688         }
2689
2690         last;
2691     }
2692
2693     die "unable to parse rule parameters: $line\n" if length($line);
2694
2695     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2696     if ($rule->{errors}) {
2697         # The verbose flag really means we're running from the CLI and want
2698         # output on the console - in the other case we really want such errors
2699         # to go into the syslog instead.
2700         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2701         $log->("$prefix - errors in rule parameters: $orig_line\n");
2702         foreach my $p (keys %{$rule->{errors}}) {
2703             $log->("  $p: $rule->{errors}->{$p}\n");
2704         }
2705     }
2706
2707     return $rule;
2708 }
2709
2710 sub verify_ethertype {
2711     my ($value) = @_;
2712     my $types = get_etc_ethertypes();
2713     die "unknown ethernet protocol type: $value\n"
2714         if !defined($types->{byname}->{$value}) &&
2715            !defined($types->{byid}->{$value});
2716 }
2717
2718 sub parse_vmfw_option {
2719     my ($line) = @_;
2720
2721     my ($opt, $value);
2722
2723     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2724
2725     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2726         $opt = lc($1);
2727         $value = int($2);
2728     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2729         $opt = lc($1);
2730         $value = $2 ? lc($3) : '';
2731     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2732         $opt = lc($1);
2733         $value = uc($3);
2734     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2735         $opt = lc($1);
2736         $value = $2;
2737     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2738         $opt = lc($1);
2739         $value = $2;
2740         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2741     } else {
2742         die "can't parse option '$line'\n"
2743     }
2744
2745     return ($opt, $value);
2746 }
2747
2748 sub parse_hostfw_option {
2749     my ($line) = @_;
2750
2751     my ($opt, $value);
2752
2753     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2754
2755     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2756         $opt = lc($1);
2757         $value = int($2);
2758     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2759         $opt = lc($1);
2760         $value = $2 ? lc($3) : '';
2761     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2762         $opt = lc($1);
2763         $value = int($2);
2764     } else {
2765         die "can't parse option '$line'\n"
2766     }
2767
2768     return ($opt, $value);
2769 }
2770
2771 sub parse_clusterfw_option {
2772     my ($line) = @_;
2773
2774     my ($opt, $value);
2775
2776     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2777         $opt = lc($1);
2778         $value = int($2);
2779         if (($value > 1) && ((time() - $value) > 60)) {
2780             $value = 0
2781         }
2782     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2783         $opt = lc($1);
2784         $value = int($2);
2785     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2786         $opt = lc($1);
2787         $value = uc($3);
2788     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2789         $opt = lc($1);
2790         $value = $2;
2791     } else {
2792         die "can't parse option '$line'\n"
2793     }
2794
2795     return ($opt, $value);
2796 }
2797
2798 sub resolve_alias {
2799     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2800
2801     my $alias = lc($cidr);
2802     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2803     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2804
2805     die "no such alias '$cidr'\n" if !$e;;
2806
2807     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2808 }
2809
2810 sub parse_ip_or_cidr {
2811     my ($cidr) = @_;
2812
2813     my $ipversion;
2814
2815     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2816         $cidr =~ s|/128$||;
2817         $ipversion = 6;
2818     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2819         $cidr =~ s|/32$||;
2820         $ipversion = 4;
2821     } else {
2822         die "value does not look like a valid IP address or CIDR network\n";
2823     }
2824
2825     return wantarray ? ($cidr, $ipversion) : $cidr;
2826 }
2827
2828 sub parse_alias {
2829     my ($line) = @_;
2830
2831     # we can add single line comments to the end of the line
2832     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2833
2834     if ($line =~ m/^(\S+)\s(\S+)$/) {
2835         my ($name, $cidr) = ($1, $2);
2836         my $ipversion;
2837
2838         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2839
2840         my $data = {
2841             name => $name,
2842             cidr => $cidr,
2843             ipversion => $ipversion,
2844         };
2845         $data->{comment} = $comment  if $comment;
2846         return $data;
2847     }
2848
2849     return undef;
2850 }
2851
2852 sub generic_fw_config_parser {
2853     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2854
2855     my $section;
2856     my $group;
2857
2858     my $res = $empty_conf;
2859
2860     my $raw;
2861     if ($filename =~ m!^/etc/pve/(.*)$!) {
2862         $raw = PVE::Cluster::get_config($1);
2863     } else {
2864         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2865     }
2866     return {} if !$raw;
2867
2868     my $linenr = 0;
2869     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2870         my $line = $1;
2871         $linenr++;
2872         next if $line =~ m/^#/;
2873         next if $line =~ m/^\s*$/;
2874         chomp $line;
2875
2876         my $prefix = "$filename (line $linenr)";
2877
2878         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2879             $section = 'options';
2880             next;
2881         }
2882
2883         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2884             $section = 'aliases';
2885             next;
2886         }
2887
2888         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2889             $section = 'groups';
2890             $group = lc($1);
2891             my $comment = $2;
2892             eval {
2893                 die "security group name too long\n" if length($group) > $max_group_name_length;
2894                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2895             };
2896             if (my $err = $@) {
2897                 ($section, $group, $comment) = undef;
2898                 warn "$prefix: $err";
2899                 next;
2900             }
2901
2902             $res->{$section}->{$group} = [];
2903             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2904                 if $comment;
2905             next;
2906         }
2907
2908         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2909             $section = 'rules';
2910             next;
2911         }
2912
2913         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2914             $section = 'ipset';
2915             $group = lc($1);
2916             my $comment = $2;
2917             eval {
2918                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2919                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2920             };
2921             if (my $err = $@) {
2922                 ($section, $group, $comment) = undef;
2923                 warn "$prefix: $err";
2924                 next;
2925             }
2926
2927             $res->{$section}->{$group} = [];
2928             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2929                 if $comment;
2930             next;
2931         }
2932
2933         if (!$section) {
2934             warn "$prefix: skip line - no section\n";
2935             next;
2936         }
2937
2938         if ($section eq 'options') {
2939             eval {
2940                 my ($opt, $value);
2941                 if ($rule_env eq 'cluster') {
2942                     ($opt, $value) = parse_clusterfw_option($line);
2943                 } elsif ($rule_env eq 'host') {
2944                     ($opt, $value) = parse_hostfw_option($line);
2945                 } else {
2946                     ($opt, $value) = parse_vmfw_option($line);
2947                 }
2948                 $res->{options}->{$opt} = $value;
2949             };
2950             warn "$prefix: $@" if $@;
2951         } elsif ($section eq 'aliases') {
2952             eval {
2953                 my $data = parse_alias($line);
2954                 $res->{aliases}->{lc($data->{name})} = $data;
2955             };
2956             warn "$prefix: $@" if $@;
2957         } elsif ($section eq 'rules') {
2958             my $rule;
2959             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2960             if (my $err = $@) {
2961                 warn "$prefix: $err";
2962                 next;
2963             }
2964             push @{$res->{$section}}, $rule;
2965         } elsif ($section eq 'groups') {
2966             my $rule;
2967             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2968             if (my $err = $@) {
2969                 warn "$prefix: $err";
2970                 next;
2971             }
2972             push @{$res->{$section}->{$group}}, $rule;
2973         } elsif ($section eq 'ipset') {
2974             # we can add single line comments to the end of the rule
2975             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2976
2977             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2978             my $nomatch = $1;
2979             my $cidr = $2;
2980             my $errors;
2981
2982             if ($nomatch && !$feature_ipset_nomatch) {
2983                 $errors->{nomatch} = "nomatch not supported by kernel";
2984             }
2985
2986             eval {
2987                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2988                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2989                 } else {
2990                     $cidr = parse_ip_or_cidr($cidr);
2991                 }
2992             };
2993             if (my $err = $@) {
2994                 chomp $err;
2995                 $errors->{cidr} = $err;
2996             }
2997
2998             if ($cidr =~ m!/0+$!) {
2999                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3000             }
3001
3002             my $entry = { cidr => $cidr };
3003             $entry->{nomatch} = 1 if $nomatch;
3004             $entry->{comment} = $comment if $comment;
3005             $entry->{errors} =  $errors if $errors;
3006
3007             if ($verbose && $errors) {
3008                 warn "$prefix - errors in ipset '$group': $line\n";
3009                 foreach my $p (keys %{$errors}) {
3010                     warn "  $p: $errors->{$p}\n";
3011                 }
3012             }
3013
3014             push @{$res->{$section}->{$group}}, $entry;
3015         } else {
3016             warn "$prefix: skip line - unknown section\n";
3017             next;
3018         }
3019     }
3020
3021     return $res;
3022 }
3023
3024 sub run_locked {
3025     my ($code, @param) = @_;
3026
3027     my $timeout = 10;
3028
3029     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3030
3031     die $@ if $@;
3032
3033     return $res;
3034 }
3035
3036 sub read_local_vm_config {
3037
3038     my $qemu = {};
3039     my $lxc = {};
3040
3041     my $vmdata = { qemu => $qemu, lxc => $lxc };
3042
3043     my $vmlist = PVE::Cluster::get_vmlist();
3044     return $vmdata if !$vmlist || !$vmlist->{ids};
3045     my $ids = $vmlist->{ids};
3046
3047     foreach my $vmid (keys %$ids) {
3048         next if !$vmid; # skip VE0
3049         my $d = $ids->{$vmid};
3050         next if !$d->{node} || $d->{node} ne $nodename;
3051         next if !$d->{type};
3052         if ($d->{type} eq 'qemu') {
3053             if ($have_qemu_server) {
3054                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3055                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3056                     $qemu->{$vmid} = $conf;
3057                 }
3058             }
3059         } elsif ($d->{type} eq 'lxc') {
3060             if ($have_lxc) {
3061                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3062                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3063                     $lxc->{$vmid} = $conf;
3064                 }
3065             }
3066         }
3067     }
3068
3069     return $vmdata;
3070 };
3071
3072 sub load_vmfw_conf {
3073     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3074
3075     $dir = $pvefw_conf_dir if !defined($dir);
3076     my $filename = "$dir/$vmid.fw";
3077
3078     my $empty_conf = {
3079         rules => [],
3080         options => {},
3081         aliases => {},
3082         ipset => {} ,
3083         ipset_comments => {},
3084     };
3085
3086     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3087     $vmfw_conf->{vmid} = $vmid;
3088
3089     return $vmfw_conf;
3090 }
3091
3092 my $format_rules = sub {
3093     my ($rules, $allow_iface) = @_;
3094
3095     my $raw = '';
3096
3097     foreach my $rule (@$rules) {
3098         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3099             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3100             $raw .= uc($rule->{type});
3101             if ($rule->{macro}) {
3102                 $raw .= " $rule->{macro}($rule->{action})";
3103             } else {
3104                 $raw .= " " . $rule->{action};
3105             }
3106             if ($allow_iface && $rule->{iface}) {
3107                 $raw .= " -i $rule->{iface}";
3108             }
3109
3110             if ($rule->{type} ne  'group')  {
3111                 $raw .= " -source $rule->{source}" if $rule->{source};
3112                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3113                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3114                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3115                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3116                 $raw .= " -log $rule->{log}" if $rule->{log};
3117             }
3118
3119             $raw .= " # " . encode('utf8', $rule->{comment})
3120                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3121             $raw .= "\n";
3122         } else {
3123             die "unknown rule type '$rule->{type}'";
3124         }
3125     }
3126
3127     return $raw;
3128 };
3129
3130 my $format_options = sub {
3131     my ($options) = @_;
3132
3133     my $raw = '';
3134
3135     $raw .= "[OPTIONS]\n\n";
3136     foreach my $opt (keys %$options) {
3137         $raw .= "$opt: $options->{$opt}\n";
3138     }
3139     $raw .= "\n";
3140
3141     return $raw;
3142 };
3143
3144 my $format_aliases = sub {
3145     my ($aliases) = @_;
3146
3147     my $raw = '';
3148
3149     $raw .= "[ALIASES]\n\n";
3150     foreach my $k (keys %$aliases) {
3151         my $e = $aliases->{$k};
3152         $raw .= "$e->{name} $e->{cidr}";
3153         $raw .= " # " . encode('utf8', $e->{comment})
3154             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3155         $raw .= "\n";
3156     }
3157     $raw .= "\n";
3158
3159     return $raw;
3160 };
3161
3162 my $format_ipsets = sub {
3163     my ($fw_conf) = @_;
3164
3165     my $raw = '';
3166
3167     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3168         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3169             my $utf8comment = encode('utf8', $comment);
3170             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3171         } else {
3172             $raw .= "[IPSET $ipset]\n\n";
3173         }
3174         my $options = $fw_conf->{ipset}->{$ipset};
3175
3176         my $nethash = {};
3177         foreach my $entry (@$options) {
3178             $nethash->{$entry->{cidr}} = $entry;
3179         }
3180
3181         foreach my $cidr (sort keys %$nethash) {
3182             my $entry = $nethash->{$cidr};
3183             my $line = $entry->{nomatch} ? '!' : '';
3184             $line .= $entry->{cidr};
3185             $line .= " # " . encode('utf8', $entry->{comment})
3186                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3187             $raw .= "$line\n";
3188         }
3189
3190         $raw .= "\n";
3191     }
3192
3193     return $raw;
3194 };
3195
3196 sub save_vmfw_conf {
3197     my ($vmid, $vmfw_conf) = @_;
3198
3199     my $raw = '';
3200
3201     my $options = $vmfw_conf->{options};
3202     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3203
3204     my $aliases = $vmfw_conf->{aliases};
3205     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3206
3207     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3208
3209     my $rules = $vmfw_conf->{rules} || [];
3210     if ($rules && scalar(@$rules)) {
3211         $raw .= "[RULES]\n\n";
3212         $raw .= &$format_rules($rules, 1);
3213         $raw .= "\n";
3214     }
3215
3216     my $filename = "$pvefw_conf_dir/$vmid.fw";
3217     if ($raw) {
3218         mkdir $pvefw_conf_dir;
3219         PVE::Tools::file_set_contents($filename, $raw);
3220     } else {
3221         unlink $filename;
3222     }
3223 }
3224
3225 sub remove_vmfw_conf {
3226     my ($vmid) = @_;
3227
3228     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3229
3230     unlink $vmfw_conffile;
3231 }
3232
3233 sub clone_vmfw_conf {
3234     my ($vmid, $newid) = @_;
3235
3236     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3237     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3238
3239     if (-f $clonevm_conffile) {
3240         unlink $clonevm_conffile;
3241     }
3242     if (-f $sourcevm_conffile) {
3243         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3244         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3245     }
3246 }
3247
3248 sub read_vm_firewall_configs {
3249     my ($cluster_conf, $vmdata, $dir) = @_;
3250
3251     my $vmfw_configs = {};
3252
3253     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3254         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3255         next if !$vmfw_conf->{options}; # skip if file does not exists
3256         $vmfw_configs->{$vmid} = $vmfw_conf;
3257     }
3258     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3259         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3260         next if !$vmfw_conf->{options}; # skip if file does not exists
3261         $vmfw_configs->{$vmid} = $vmfw_conf;
3262     }
3263
3264     return $vmfw_configs;
3265 }
3266
3267 sub get_option_log_level {
3268     my ($options, $k) = @_;
3269
3270     my $v = $options->{$k};
3271     $v = $default_log_level if !defined($v);
3272
3273     return undef if $v eq '' || $v eq 'nolog';
3274
3275     return $v if defined($log_level_hash->{$v});
3276
3277     warn "unknown log level ($k = '$v')\n";
3278
3279     return undef;
3280 }
3281
3282 sub generate_std_chains {
3283     my ($ruleset, $options, $ipversion) = @_;
3284
3285     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3286
3287     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3288     my $chain = 'PVEFW-smurflog';
3289     if ( $std_chains->{$chain} ) {
3290         foreach my $r (@{$std_chains->{$chain}}) {
3291           $r->{log} = $loglevel;
3292         }
3293     }
3294
3295     # same as shorewall logflags action.
3296     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3297     $chain = 'PVEFW-logflags';
3298     if ( $std_chains->{$chain} ) {
3299         foreach my $r (@{$std_chains->{$chain}}) {
3300           $r->{log} = $loglevel;
3301         }
3302     }
3303
3304     foreach my $chain (keys %$std_chains) {
3305         ruleset_create_chain($ruleset, $chain);
3306         foreach my $rule (@{$std_chains->{$chain}}) {
3307             if (ref($rule)) {
3308                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3309             } else {
3310                 die "rule $rule as string - should not happen";
3311             }
3312         }
3313     }
3314 }
3315
3316 sub generate_ipset_chains {
3317     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3318
3319     foreach my $ipset (keys %{$ipsets}) {
3320
3321         my $options = $ipsets->{$ipset};
3322
3323         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3324             if (my $ips = $device_ips->{$1}) {
3325                 $options = [@$options, @$ips];
3326             }
3327         }
3328
3329         # remove duplicates
3330         my $nethash = {};
3331         foreach my $entry (@$options) {
3332             next if $entry->{errors}; # skip entries with errors
3333             eval {
3334                 my ($cidr, $ver);
3335                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3336                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3337                 } else {
3338                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3339                 }
3340                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3341                 if ($ver == 6) {
3342                     # ip_compress_address takes an address only, no CIDR
3343                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3344                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3345                     $cidr .= $prefix_len if defined($prefix_len);
3346                     $cidr =~ s|/128$||;
3347                 } else {
3348                     $cidr =~ s|/32$||;
3349                 }
3350
3351                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3352             };
3353             warn $@ if $@;
3354         }
3355
3356         foreach my $ipversion (4, 6) {
3357             my $data = $nethash->{$ipversion};
3358
3359             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3360
3361             my $hashsize = scalar(@$options);
3362             if ($hashsize <= 64) {
3363                 $hashsize = 64;
3364             } else {
3365                 $hashsize = round_powerof2($hashsize);
3366             }
3367
3368             my $family = $ipversion == "6" ? "inet6" : "inet";
3369
3370             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3371
3372             foreach my $cidr (sort keys %$data) {
3373                 my $entry = $data->{$cidr};
3374
3375                 my $cmd = "add $name $cidr";
3376                 if ($entry->{nomatch}) {
3377                     if ($feature_ipset_nomatch) {
3378                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3379                     } else {
3380                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3381                     }
3382                 } else {
3383                     push @{$ipset_ruleset->{$name}}, $cmd;
3384                 }
3385             }
3386         }
3387     }
3388 }
3389
3390 sub round_powerof2 {
3391     my ($int) = @_;
3392
3393     $int--;
3394     $int |= $int >> $_ foreach (1,2,4,8,16);
3395     return ++$int;
3396 }
3397
3398 my $set_global_log_ratelimit = sub {
3399     my $cluster_opts = shift;
3400
3401     $global_log_ratelimit = '--limit 1/sec';
3402     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3403         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3404         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3405
3406         if ($limit->{enable}) {
3407             if (my $rate = $limit->{rate}) {
3408                 $global_log_ratelimit = "--limit $rate";
3409             }
3410             if (my $burst = $limit->{burst}) {
3411                 $global_log_ratelimit .= " --limit-burst $burst";
3412             }
3413         } else {
3414             $global_log_ratelimit = undef;
3415         }
3416     }
3417 };
3418
3419 sub load_clusterfw_conf {
3420     my ($filename) = @_;
3421
3422     $filename = $clusterfw_conf_filename if !defined($filename);
3423     my $empty_conf = {
3424         rules => [],
3425         options => {},
3426         aliases => {},
3427         groups => {},
3428         group_comments => {},
3429         ipset => {} ,
3430         ipset_comments => {},
3431     };
3432
3433     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3434     $set_global_log_ratelimit->($cluster_conf->{options});
3435
3436     return $cluster_conf;
3437 }
3438
3439 sub save_clusterfw_conf {
3440     my ($cluster_conf) = @_;
3441
3442     my $raw = '';
3443
3444     my $options = $cluster_conf->{options};
3445     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3446
3447     my $aliases = $cluster_conf->{aliases};
3448     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3449
3450     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3451
3452     my $rules = $cluster_conf->{rules};
3453     if ($rules && scalar(@$rules)) {
3454         $raw .= "[RULES]\n\n";
3455         $raw .= &$format_rules($rules, 1);
3456         $raw .= "\n";
3457     }
3458
3459     if ($cluster_conf->{groups}) {
3460         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3461             my $rules = $cluster_conf->{groups}->{$group};
3462             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3463                 my $utf8comment = encode('utf8', $comment);
3464                 $raw .= "[group $group] # $utf8comment\n\n";
3465             } else {
3466                 $raw .= "[group $group]\n\n";
3467             }
3468
3469             $raw .= &$format_rules($rules, 0);
3470             $raw .= "\n";
3471         }
3472     }
3473
3474     if ($raw) {
3475         mkdir $pvefw_conf_dir;
3476         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3477     } else {
3478         unlink $clusterfw_conf_filename;
3479     }
3480 }
3481
3482 sub load_hostfw_conf {
3483     my ($cluster_conf, $filename) = @_;
3484
3485     $filename = $hostfw_conf_filename if !defined($filename);
3486
3487     my $empty_conf = { rules => [], options => {}};
3488     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3489 }
3490
3491 sub save_hostfw_conf {
3492     my ($hostfw_conf) = @_;
3493
3494     my $raw = '';
3495
3496     my $options = $hostfw_conf->{options};
3497     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3498
3499     my $rules = $hostfw_conf->{rules};
3500     if ($rules && scalar(@$rules)) {
3501         $raw .= "[RULES]\n\n";
3502         $raw .= &$format_rules($rules, 1);
3503         $raw .= "\n";
3504     }
3505
3506     if ($raw) {
3507         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3508     } else {
3509         unlink $hostfw_conf_filename;
3510     }
3511 }
3512
3513 sub compile {
3514     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3515
3516     my $vmfw_configs;
3517
3518     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3519     $pve_std_chains = dclone($pve_std_chains_conf);
3520
3521     if ($vmdata) { # test mode
3522         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3523         my $filename = "$testdir/cluster.fw";
3524         $cluster_conf = load_clusterfw_conf($filename);
3525
3526         $filename = "$testdir/host.fw";
3527         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3528
3529         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3530     } else { # normal operation
3531         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3532
3533         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3534
3535         # cfs_update is handled by daemon or API
3536         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3537             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3538
3539         $vmdata = read_local_vm_config();
3540         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3541     }
3542
3543     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3544
3545     my $localnet;
3546     if ($cluster_conf->{aliases}->{local_network}) {
3547         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3548     } else {
3549         my $localnet_ver;
3550         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3551
3552         $cluster_conf->{aliases}->{local_network} = {
3553             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3554     }
3555
3556     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3557
3558     my $ruleset = {};
3559     my $rulesetv6 = {};
3560     $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3561     $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3562     $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3563     $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3564     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3565     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3566
3567     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3568 }
3569
3570 sub compile_iptables_raw {
3571     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3572
3573     my $ruleset = {};
3574
3575     return $ruleset;
3576 }
3577
3578 sub compile_iptables_filter {
3579     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3580
3581     my $ruleset = {};
3582
3583     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3584     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3585
3586     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3587
3588     my $hostfw_options = $hostfw_conf->{options} || {};
3589
3590     # fixme: what log level should we use here?
3591     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3592
3593     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3594     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3595
3596     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3597     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3598
3599     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3600
3601     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3602     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3603
3604     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3605
3606     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3607
3608     if ($hostfw_enable) {
3609         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3610         warn $@ if $@; # just to be sure - should not happen
3611     }
3612
3613     # generate firewall rules for QEMU VMs
3614     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3615         eval {
3616             my $conf = $vmdata->{qemu}->{$vmid};
3617             my $vmfw_conf = $vmfw_configs->{$vmid};
3618             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3619
3620             foreach my $netid (sort keys %$conf) {
3621                 next if $netid !~ m/^net(\d+)$/;
3622                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3623                 next if !$net->{firewall};
3624
3625                 my $iface = "tap${vmid}i$1";
3626                 my $macaddr = $net->{macaddr};
3627                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3628                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3629                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3630                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3631             }
3632         };
3633         warn $@ if $@; # just to be sure - should not happen
3634     }
3635
3636     # generate firewall rules for LXC containers
3637     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3638         eval {
3639             my $conf = $vmdata->{lxc}->{$vmid};
3640             my $vmfw_conf = $vmfw_configs->{$vmid};
3641             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3642
3643             foreach my $netid (sort keys %$conf) {
3644                 next if $netid !~ m/^net(\d+)$/;
3645                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3646                 next if !$net->{firewall};
3647
3648                 my $iface = "veth${vmid}i$1";
3649                 my $macaddr = $net->{hwaddr};
3650                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3651                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3652                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3653                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3654             }
3655         };
3656         warn $@ if $@; # just to be sure - should not happen
3657     }
3658
3659     if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3660         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3661     }
3662
3663     return $ruleset;
3664 }
3665
3666 sub mac_to_linklocal {
3667     my ($macaddr) = @_;
3668     my @parts = split(/:/, $macaddr);
3669     # The standard link local address uses the fe80::/64 prefix with the
3670     # modified EUI-64 identifier derived from the MAC address by flipping the
3671     # universal/local bit and inserting FF:FE in the middle.
3672     # See RFC 4291.
3673     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3674     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3675     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3676 }
3677
3678 sub compile_ipsets {
3679     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3680
3681     my $localnet;
3682     if ($cluster_conf->{aliases}->{local_network}) {
3683         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3684     } else {
3685         my $localnet_ver;
3686         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3687
3688         $cluster_conf->{aliases}->{local_network} = {
3689             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3690     }
3691
3692     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3693
3694
3695     my $ipset_ruleset = {};
3696
3697     # generate ipsets for QEMU VMs
3698     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3699         eval {
3700             my $conf = $vmdata->{qemu}->{$vmid};
3701             my $vmfw_conf = $vmfw_configs->{$vmid};
3702             return if !$vmfw_conf;
3703
3704             # When the 'ipfilter' option is enabled every device for which there
3705             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3706             # ipset.
3707             # The reason is that ipfilter ipsets are always filled with standard
3708             # IPv6 link-local filters.
3709             my $ipsets = $vmfw_conf->{ipset};
3710             my $implicit_sets = {};
3711
3712             my $device_ips = {};
3713             foreach my $netid (keys %$conf) {
3714                 next if $netid !~ m/^net(\d+)$/;
3715                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3716                 next if !$net->{firewall};
3717
3718                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3719                     $implicit_sets->{"ipfilter-$netid"} = [];
3720                 }
3721
3722                 my $macaddr = $net->{macaddr};
3723                 my $linklocal = mac_to_linklocal($macaddr);
3724                 $device_ips->{$netid} = [
3725                     { cidr => $linklocal },
3726                     { cidr => 'fe80::/10', nomatch => 1 }
3727                 ];
3728             }
3729
3730             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3731             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3732         };
3733         warn $@ if $@; # just to be sure - should not happen
3734     }
3735
3736     # generate firewall rules for LXC containers
3737     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3738         eval {
3739             my $conf = $vmdata->{lxc}->{$vmid};
3740             my $vmfw_conf = $vmfw_configs->{$vmid};
3741             return if !$vmfw_conf;
3742
3743             # When the 'ipfilter' option is enabled every device for which there
3744             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3745             # ipset.
3746             # The reason is that ipfilter ipsets are always filled with standard
3747             # IPv6 link-local filters, as well as the IP addresses configured
3748             # for the container.
3749             my $ipsets = $vmfw_conf->{ipset};
3750             my $implicit_sets = {};
3751
3752             my $device_ips = {};
3753             foreach my $netid (keys %$conf) {
3754                 next if $netid !~ m/^net(\d+)$/;
3755                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3756                 next if !$net->{firewall};
3757
3758                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3759                     $implicit_sets->{"ipfilter-$netid"} = [];
3760                 }
3761
3762                 my $macaddr = $net->{hwaddr};
3763                 my $linklocal = mac_to_linklocal($macaddr);
3764                 my $set = $device_ips->{$netid} = [
3765                     { cidr => $linklocal },
3766                     { cidr => 'fe80::/10', nomatch => 1 }
3767                 ];
3768                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3769                     push @$set, { cidr => $1 };
3770                 }
3771                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3772                     push @$set, { cidr => $1 };
3773                 }
3774             }
3775
3776             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3777             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3778         };
3779         warn $@ if $@; # just to be sure - should not happen
3780     }
3781
3782     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3783
3784     return $ipset_ruleset;
3785 }
3786
3787 sub compile_ebtables_filter {
3788     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3789
3790     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3791         return {};
3792     }
3793
3794     my $ruleset = {};
3795
3796     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3797
3798     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3799     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3800     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3801     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3802     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3803
3804     # generate firewall rules for QEMU VMs
3805     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3806         eval {
3807             my $conf = $vmdata->{qemu}->{$vmid};
3808             my $vmfw_conf = $vmfw_configs->{$vmid};
3809             return if !$vmfw_conf;
3810             my $ipsets = $vmfw_conf->{ipset};
3811
3812             foreach my $netid (sort keys %$conf) {
3813                 next if $netid !~ m/^net(\d+)$/;
3814                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3815                 next if !$net->{firewall};
3816                 my $iface = "tap${vmid}i$1";
3817                 my $macaddr = $net->{macaddr};
3818                 my $arpfilter = [];
3819                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3820                     foreach my $ipaddr (@$ipset) {
3821                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3822                         next if !$ip || ($version && $version != 4);
3823                         push(@$arpfilter, $ip);
3824                     }
3825                 }
3826                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3827             }
3828         };
3829         warn $@ if $@; # just to be sure - should not happen
3830     }
3831
3832     # generate firewall rules for LXC containers
3833     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3834         eval {
3835             my $conf = $vmdata->{lxc}->{$vmid};
3836
3837             my $vmfw_conf = $vmfw_configs->{$vmid};
3838             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3839             my $ipsets = $vmfw_conf->{ipset};
3840
3841             foreach my $netid (sort keys %$conf) {
3842                 next if $netid !~ m/^net(\d+)$/;
3843                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3844                 next if !$net->{firewall};
3845                 my $iface = "veth${vmid}i$1";
3846                 my $macaddr = $net->{hwaddr};
3847                 my $arpfilter = [];
3848                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3849                     foreach my $ipaddr (@$ipset) {
3850                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3851                         next if !$ip || ($version && $version != 4);
3852                         push(@$arpfilter, $ip);
3853                     }
3854                 }
3855                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3856                     # ebtables changes this to a .0/MASK network but we just
3857                     # want the address here, no network - see #2193
3858                     $ip =~ s|/(\d+)$||;
3859                     push @$arpfilter, $ip;
3860                 }
3861                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3862             }
3863         };
3864         warn $@ if $@; # just to be sure - should not happen
3865     }
3866
3867     return $ruleset;
3868 }
3869
3870 sub generate_tap_layer2filter {
3871     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3872     my $options = $vmfw_conf->{options};
3873
3874     my $tapchain = $iface."-OUT";
3875
3876     # ebtables remove zeros from mac pairs
3877     $macaddr =~ s/0([0-9a-f])/$1/ig;
3878     $macaddr = lc($macaddr);
3879
3880     ruleset_create_chain($ruleset, $tapchain);
3881
3882     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3883             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3884     }
3885
3886     if (@$arpfilter){
3887         my $arpchain = $tapchain."-ARP";
3888         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3889         ruleset_create_chain($ruleset, $arpchain);
3890
3891         foreach my $ip (@{$arpfilter}) {
3892             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3893         }
3894         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3895     }
3896
3897     if (defined($options->{layer2_protocols})){
3898         my $protochain = $tapchain."-PROTO";
3899         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3900         ruleset_create_chain($ruleset, $protochain);
3901
3902         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3903             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3904         }
3905         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3906     }
3907
3908     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3909
3910     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3911 }
3912
3913 # the parameter $change_only_regex changes two things if defined:
3914 # * all chains not matching it will be left intact
3915 # * both the $active_chains hash and the returned status_hash have different
3916 #   structure (they contain a key named 'rules').
3917 sub get_ruleset_status {
3918     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3919
3920     my $statushash = {};
3921
3922     foreach my $chain (sort keys %$ruleset) {
3923         my $rules = $ruleset->{$chain};
3924         my $sig = &$digest_fn($rules);
3925         my $oldsig;
3926
3927         $statushash->{$chain}->{sig} = $sig;
3928         if (defined($change_only_regex)) {
3929             $oldsig = $active_chains->{$chain}->{sig};
3930             $statushash->{$chain}->{rules} = $rules;
3931         } else {
3932             $oldsig = $active_chains->{$chain};
3933         }
3934         if (!defined($oldsig)) {
3935             $statushash->{$chain}->{action} = 'create';
3936         } else {
3937             if ($oldsig eq $sig) {
3938                 $statushash->{$chain}->{action} = 'exists';
3939             } else {
3940                 $statushash->{$chain}->{action} = 'update';
3941             }
3942         }
3943         if ($verbose) {
3944             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3945             foreach my $cmd (@{$rules}) {
3946                 print "\t$cmd\n";
3947             }
3948         }
3949     }
3950
3951     foreach my $chain (sort keys %$active_chains) {
3952         next if defined($ruleset->{$chain});
3953         my $action = 'delete';
3954         my $sig = $active_chains->{$chain};
3955         if (defined($change_only_regex)) {
3956             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3957             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3958             $sig = $sig->{sig};
3959         }
3960         $statushash->{$chain}->{action} = $action;
3961         $statushash->{$chain}->{sig} = $sig;
3962         print "$action $chain ($sig)\n" if $verbose;
3963     }
3964
3965     return $statushash;
3966 }
3967
3968 sub print_sig_rule {
3969     my ($chain, $sig) = @_;
3970
3971     # We just use this to store a SHA1 checksum used to detect changes
3972     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3973 }
3974
3975 sub get_ruleset_cmdlist {
3976     my ($ruleset, $iptablescmd, $table) = @_;
3977
3978     $table = 'filter' if !$table;
3979
3980     my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
3981
3982     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
3983     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
3984
3985     # create missing chains first
3986     foreach my $chain (sort keys %$ruleset) {
3987         my $stat = $statushash->{$chain};
3988         die "internal error" if !$stat;
3989         next if $stat->{action} ne 'create';
3990
3991         $cmdlist .= ":$chain - [0:0]\n";
3992     }
3993
3994     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
3995         my $chain = "PVEFW-$h";
3996         if ($ruleset->{$chain} && !$hooks->{$h}) {
3997             $cmdlist .= "-A $h -j $chain\n";
3998         }
3999     }
4000
4001     foreach my $chain (sort keys %$ruleset) {
4002         my $stat = $statushash->{$chain};
4003         die "internal error" if !$stat;
4004
4005         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4006             $cmdlist .= "-F $chain\n";
4007             foreach my $cmd (@{$ruleset->{$chain}}) {
4008                 $cmdlist .= "$cmd\n";
4009             }
4010             $cmdlist .= print_sig_rule($chain, $stat->{sig});
4011         } elsif ($stat->{action} eq 'delete') {
4012             die "internal error"; # this should not happen
4013         } elsif ($stat->{action} eq 'exists') {
4014             # do nothing
4015         } else {
4016             die "internal error - unknown status '$stat->{action}'";
4017         }
4018     }
4019
4020     foreach my $chain (keys %$statushash) {
4021         next if $statushash->{$chain}->{action} ne 'delete';
4022         $cmdlist .= "-F $chain\n";
4023     }
4024     foreach my $chain (keys %$statushash) {
4025         next if $statushash->{$chain}->{action} ne 'delete';
4026         next if $chain eq 'PVEFW-INPUT';
4027         next if $chain eq 'PVEFW-OUTPUT';
4028         next if $chain eq 'PVEFW-FORWARD';
4029         next if $chain eq 'PVEFW-PREROUTING';
4030         $cmdlist .= "-X $chain\n";
4031     }
4032
4033     my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4034
4035     $cmdlist .= "COMMIT\n";
4036
4037     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4038 }
4039
4040 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4041
4042 sub get_ebtables_cmdlist {
4043     my ($ruleset) = @_;
4044
4045     my $changes = 0;
4046     my $cmdlist = "*filter\n";
4047
4048     my $active_chains = ebtables_get_chains();
4049     my $statushash = get_ruleset_status($ruleset, $active_chains,
4050                                         \&iptables_chain_digest,
4051                                         $pve_ebtables_chainname_regex);
4052
4053     # create chains first and make sure PVE rules are evaluated if active
4054     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4055     my $pve_include = 0;
4056     foreach my $chain (sort keys %$statushash) {
4057         next if ($statushash->{$chain}->{action} eq 'delete');
4058         $cmdlist .= ":$chain ACCEPT\n";
4059         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4060     }
4061
4062     foreach my $chain (sort keys %$statushash) {
4063         my $stat = $statushash->{$chain};
4064         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4065         next if ($stat->{action} eq 'delete');
4066
4067         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4068             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4069                 next if ! $pve_include;
4070                 $pve_include = 0;
4071             }
4072             $cmdlist .= "$cmd\n";
4073         }
4074     }
4075     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4076
4077     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4078 }
4079
4080 sub get_ipset_cmdlist {
4081     my ($ruleset) = @_;
4082
4083     my $cmdlist = "";
4084
4085     my $delete_cmdlist = "";
4086
4087     my $active_chains = ipset_get_chains();
4088     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4089
4090     # remove stale _swap chains
4091     foreach my $chain (keys %$active_chains) {
4092         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4093             $cmdlist .= "destroy $chain\n";
4094         }
4095     }
4096
4097     foreach my $chain (keys %$ruleset) {
4098         my $stat = $statushash->{$chain};
4099         die "internal error" if !$stat;
4100
4101         if ($stat->{action} eq 'create') {
4102             foreach my $cmd (@{$ruleset->{$chain}}) {
4103                 $cmdlist .= "$cmd\n";
4104             }
4105         }
4106     }
4107
4108     foreach my $chain (keys %$ruleset) {
4109         my $stat = $statushash->{$chain};
4110         die "internal error" if !$stat;
4111
4112         if ($stat->{action} eq 'update') {
4113             my $chain_swap = $chain."_swap";
4114
4115             foreach my $cmd (@{$ruleset->{$chain}}) {
4116                 $cmd =~ s/$chain/$chain_swap/;
4117                 $cmdlist .= "$cmd\n";
4118             }
4119             $cmdlist .= "swap $chain_swap $chain\n";
4120             $cmdlist .= "flush $chain_swap\n";
4121             $cmdlist .= "destroy $chain_swap\n";
4122         }
4123     }
4124
4125      # the remove unused chains
4126     foreach my $chain (keys %$statushash) {
4127         next if $statushash->{$chain}->{action} ne 'delete';
4128
4129         $delete_cmdlist .= "flush $chain\n";
4130         $delete_cmdlist .= "destroy $chain\n";
4131     }
4132
4133     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4134
4135     return ($cmdlist, $delete_cmdlist, $changes);
4136 }
4137
4138 sub apply_ruleset {
4139     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4140
4141     enable_bridge_firewall();
4142
4143     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4144         get_ipset_cmdlist($ipset_ruleset);
4145
4146     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4147     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
4148     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4149     my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4150     my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
4151
4152     if ($verbose) {
4153         if ($ipset_changes) {
4154             print "ipset changes:\n";
4155             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4156             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4157         }
4158
4159         if ($changes) {
4160             print "iptables changes:\n";
4161             print $cmdlist;
4162         }
4163
4164         if ($changesv6) {
4165             print "ip6tables changes:\n";
4166             print $cmdlistv6;
4167         }
4168
4169         if ($changes_raw) {
4170             print "iptables table raw changes:\n";
4171             print $cmdlist_raw;
4172         }
4173
4174         if ($changesv6_raw) {
4175             print "ip6tables table raw changes:\n";
4176             print $cmdlistv6_raw;
4177         }
4178
4179         if ($ebtables_changes) {
4180             print "ebtables changes:\n";
4181             print $ebtables_cmdlist;
4182         }
4183     }
4184
4185     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4186     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4187
4188     ipset_restore_cmdlist($ipset_create_cmdlist);
4189
4190     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4191     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4192
4193     iptables_restore_cmdlist($cmdlist);
4194
4195     $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4196     PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4197
4198     iptables_restore_cmdlist($cmdlist_raw, 'raw');
4199
4200     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4201     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4202
4203     ip6tables_restore_cmdlist($cmdlistv6);
4204
4205     $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4206     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4207
4208     ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4209
4210     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4211     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4212
4213     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4214
4215     ebtables_restore_cmdlist($ebtables_cmdlist);
4216
4217     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4218     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4219
4220     # test: re-read status and check if everything is up to date
4221     my $ruleset_filter = $ruleset->{filter};
4222     my $active_chains = iptables_get_chains();
4223     my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
4224
4225     my $errors;
4226     foreach my $chain (sort keys %$ruleset_filter) {
4227         my $stat = $statushash->{$chain};
4228         if ($stat->{action} ne 'exists') {
4229             warn "unable to update chain '$chain'\n";
4230             $errors = 1;
4231         }
4232     }
4233
4234     my $rulesetv6_filter = $rulesetv6->{filter};
4235     my $active_chainsv6 = iptables_get_chains("ip6tables");
4236     my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
4237
4238     foreach my $chain (sort keys %$rulesetv6_filter) {
4239         my $stat = $statushashv6->{$chain};
4240         if ($stat->{action} ne 'exists') {
4241             warn "unable to update chain '$chain'\n";
4242             $errors = 1;
4243         }
4244     }
4245
4246     my $ruleset_raw = $ruleset->{raw};
4247     my $active_chains_raw = iptables_get_chains(undef, 'raw');
4248     my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4249
4250     foreach my $chain (sort keys %$ruleset_raw) {
4251         my $stat = $statushash_raw->{$chain};
4252         if ($stat->{action} ne 'exists') {
4253             warn "unable to update chain '$chain'\n";
4254             $errors = 1;
4255         }
4256     }
4257
4258     my $rulesetv6_raw = $rulesetv6->{raw};
4259     my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4260     my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4261
4262     foreach my $chain (sort keys %$rulesetv6_raw) {
4263         my $stat = $statushashv6_raw->{$chain};
4264         if ($stat->{action} ne 'exists') {
4265             warn "unable to update chain '$chain'\n";
4266             $errors = 1;
4267         }
4268     }
4269
4270     my $active_ebtables_chains = ebtables_get_chains();
4271     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4272                                 $active_ebtables_chains, \&iptables_chain_digest,
4273                                 $pve_ebtables_chainname_regex);
4274
4275     foreach my $chain (sort keys %$ebtables_ruleset) {
4276         my $stat = $ebtables_statushash->{$chain};
4277         if ($stat->{action} ne 'exists') {
4278             warn "ebtables : unable to update chain '$chain'\n";
4279             $errors = 1;
4280         }
4281     }
4282
4283     die "unable to apply firewall changes\n" if $errors;
4284
4285     update_nf_conntrack_max($hostfw_conf);
4286
4287     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4288
4289     update_nf_conntrack_logging($hostfw_conf);
4290 }
4291
4292 sub update_nf_conntrack_max {
4293     my ($hostfw_conf) = @_;
4294
4295     my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4296
4297     my $options = $hostfw_conf->{options} || {};
4298
4299     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4300         $max = $options->{nf_conntrack_max};
4301         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4302     }
4303
4304     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4305     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4306
4307     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4308
4309     if ($current != $max) {
4310         my $hashsize = int($max/4);
4311         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4312         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4313     }
4314 }
4315
4316 sub update_nf_conntrack_tcp_timeout_established {
4317     my ($hostfw_conf) = @_;
4318
4319     my $options = $hostfw_conf->{options} || {};
4320
4321     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4322
4323     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4324 }
4325
4326 my $log_nf_conntrack_enabled = undef;
4327 sub update_nf_conntrack_logging {
4328     my ($hostfw_conf) = @_;
4329
4330     my $options = $hostfw_conf->{options} || {};
4331     my $value = $options->{log_nf_conntrack} || 0;
4332     if (!defined($log_nf_conntrack_enabled)
4333         || $value != $log_nf_conntrack_enabled)
4334     {
4335         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4336         PVE::Tools::file_set_contents($tmpfile, $value);
4337
4338         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4339         $log_nf_conntrack_enabled = $value;
4340     }
4341 }
4342
4343 sub remove_pvefw_chains {
4344
4345     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4346     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4347     PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4348     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
4349     PVE::Firewall::remove_pvefw_chains_ipset();
4350     PVE::Firewall::remove_pvefw_chains_ebtables();
4351
4352 }
4353
4354 sub remove_pvefw_chains_iptables {
4355     my ($iptablescmd, $table) = @_;
4356
4357     $table = 'filter' if !$table;
4358
4359     my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4360     my $cmdlist = "*$table\n";
4361
4362     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4363         if ($hooks->{$h}) {
4364             $cmdlist .= "-D $h -j PVEFW-$h\n";
4365         }
4366     }
4367
4368     foreach my $chain (keys %$chash) {
4369         $cmdlist .= "-F $chain\n";
4370     }
4371
4372     foreach my $chain (keys %$chash) {
4373         $cmdlist .= "-X $chain\n";
4374     }
4375     $cmdlist .= "COMMIT\n";
4376
4377     if($iptablescmd eq "ip6tables") {
4378         ip6tables_restore_cmdlist($cmdlist, $table);
4379     } else {
4380         iptables_restore_cmdlist($cmdlist, $table);
4381     }
4382 }
4383
4384 sub remove_pvefw_chains_ipset {
4385
4386     my $ipset_chains = ipset_get_chains();
4387
4388     my $cmdlist = "";
4389
4390     foreach my $chain (keys %$ipset_chains) {
4391         $cmdlist .= "flush $chain\n";
4392         $cmdlist .= "destroy $chain\n";
4393     }
4394
4395     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4396 }
4397
4398 sub remove_pvefw_chains_ebtables {
4399     # apply empty ruleset = remove all our chains
4400     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4401 }
4402
4403 sub init {
4404     my $cluster_conf = load_clusterfw_conf();
4405     my $cluster_options = $cluster_conf->{options};
4406     my $enable = $cluster_options->{enable};
4407
4408     return if !$enable;
4409
4410     # load required modules here
4411 }
4412
4413 sub update {
4414     my $code = sub {
4415
4416         my $cluster_conf = load_clusterfw_conf();
4417         my $cluster_options = $cluster_conf->{options};
4418
4419         if (!$cluster_options->{enable}) {
4420             PVE::Firewall::remove_pvefw_chains();
4421             return;
4422         }
4423
4424         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4425
4426         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4427
4428         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4429     };
4430
4431     run_locked($code);
4432 }
4433
4434 1;