src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use File::Basename;
  16 use File::Path;
  17 use IO::File;
  18 use Net::IP;
  19 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  20 use Encode;
  21
  22 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  23 my $pvefw_conf_dir = "/etc/pve/firewall";
  24 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  25
  26 # dynamically include PVE::QemuServer and PVE::LXC
  27 # to avoid dependency problems
  28 my $have_qemu_server;
  29 eval {
  30     require PVE::QemuServer;
  31     require PVE::QemuConfig;
  32     $have_qemu_server = 1;
  33 };
  34
  35 my $have_lxc;
  36 eval {
  37     require PVE::LXC;
  38     $have_lxc = 1;
  39 };
  40
  41
  42 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  43
  44 mkdir $pve_fw_status_dir; # make sure this exists
  45
  46 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  47 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  48 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49
  50 my $max_alias_name_length = 64;
  51 my $max_ipset_name_length = 64;
  52 my $max_group_name_length = 20;
  53
  54 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  55 sub pve_verify_ip_or_cidr {
  56     my ($cidr, $noerr) = @_;
  57
  58     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  59         return $cidr if Net::IP->new($cidr);
  60         return undef if $noerr;
  61         die Net::IP::Error() . "\n";
  62     }
  63     return undef if $noerr;
  64     die "value does not look like a valid IP address or CIDR network\n";
  65 }
  66
  67 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  68 sub pve_verify_ip_or_cidr_or_alias {
  69     my ($cidr, $noerr) = @_;
  70
  71     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  72
  73     return pve_verify_ip_or_cidr($cidr, $noerr);
  74 }
  75
  76 PVE::JSONSchema::register_standard_option('ipset-name', {
  77     description => "IP set name.",
  78     type => 'string',
  79     pattern => $ipset_name_pattern,
  80     minLength => 2,
  81     maxLength => $max_ipset_name_length,
  82 });
  83
  84 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  85     description => "Alias name.",
  86     type => 'string',
  87     pattern => $ip_alias_pattern,
  88     minLength => 2,
  89     maxLength => $max_alias_name_length,
  90 });
  91
  92 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  93     description => "Log level.",
  94     type => 'string',
  95     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  96     optional => 1,
  97 });
  98
  99 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 100     description => "Security Group name.",
 101     type => 'string',
 102     pattern => $security_group_name_pattern,
 103     minLength => 2,
 104     maxLength => $max_group_name_length,
 105 });
 106
 107 my $feature_ipset_nomatch = 0;
 108 eval  {
 109     my (undef, undef, $release) = POSIX::uname();
 110     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 111         my ($major, $minor) = ($1, $2);
 112         $feature_ipset_nomatch = 1 if ($major > 3) ||
 113             ($major == 3 && $minor >= 7);
 114     }
 115
 116 };
 117
 118 my $nodename = PVE::INotify::nodename();
 119
 120 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 121
 122 my $default_log_level = 'nolog'; # avoid logs by default
 123
 124 my $log_level_hash = {
 125     debug => 7,
 126     info => 6,
 127     notice => 5,
 128     warning => 4,
 129     err => 3,
 130     crit => 2,
 131     alert => 1,
 132     emerg => 0,
 133 };
 134
 135 # we need to overwrite some macros for ipv6
 136 my $pve_ipv6fw_macros = {
 137     'Ping' => [
 138         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 139     ],
 140     'NeighborDiscovery' => [
 141         "IPv6 neighbor solicitation, neighbor and router advertisement",
 142         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 143         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 144         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 145         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 146     ],
 147     'DHCPv6' => [
 148         "DHCPv6 traffic",
 149         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 150     ],
 151     'Trcrt' => [
 152         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 153         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 154     ],
 155  };
 156
 157 # imported/converted from: /usr/share/shorewall/macro.*
 158 my $pve_fw_macros = {
 159     'Amanda' => [
 160         "Amanda Backup",
 161         { action => 'PARAM', proto => 'udp', dport => '10080' },
 162         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 163     ],
 164     'Auth' => [
 165         "Auth (identd) traffic",
 166         { action => 'PARAM', proto => 'tcp', dport => '113' },
 167     ],
 168     'BGP' => [
 169         "Border Gateway Protocol traffic",
 170         { action => 'PARAM', proto => 'tcp', dport => '179' },
 171     ],
 172     'BitTorrent' => [
 173         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 174         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 175         { action => 'PARAM', proto => 'udp', dport => '6881' },
 176     ],
 177     'BitTorrent32' => [
 178         "BitTorrent traffic for BitTorrent 3.2 and later",
 179         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 180         { action => 'PARAM', proto => 'udp', dport => '6881' },
 181     ],
 182     'Ceph' => [
 183         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 184         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 185         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 186     ],
 187     'CVS' => [
 188         "Concurrent Versions System pserver traffic",
 189         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 190     ],
 191     'Citrix' => [
 192         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 193         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 194         { action => 'PARAM', proto => 'udp', dport => '1604' },
 195         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 196     ],
 197     'DAAP' => [
 198         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 199         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 200         { action => 'PARAM', proto => 'udp', dport => '3689' },
 201     ],
 202     'DCC' => [
 203         "Distributed Checksum Clearinghouse spam filtering mechanism",
 204         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 205     ],
 206     'DHCPfwd' => [
 207         "Forwarded DHCP traffic",
 208         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 209     ],
 210     'DNS' => [
 211         "Domain Name System traffic (upd and tcp)",
 212         { action => 'PARAM', proto => 'udp', dport => '53' },
 213         { action => 'PARAM', proto => 'tcp', dport => '53' },
 214     ],
 215     'Distcc' => [
 216         "Distributed Compiler service",
 217         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 218     ],
 219     'FTP' => [
 220         "File Transfer Protocol",
 221         { action => 'PARAM', proto => 'tcp', dport => '21' },
 222     ],
 223     'Finger' => [
 224         "Finger protocol (RFC 742)",
 225         { action => 'PARAM', proto => 'tcp', dport => '79' },
 226     ],
 227     'GNUnet' => [
 228         "GNUnet secure peer-to-peer networking traffic",
 229         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 230         { action => 'PARAM', proto => 'udp', dport => '2086' },
 231         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 232         { action => 'PARAM', proto => 'udp', dport => '1080' },
 233     ],
 234     'GRE' => [
 235         "Generic Routing Encapsulation tunneling protocol",
 236         { action => 'PARAM', proto => '47' },
 237     ],
 238     'Git' => [
 239         "Git distributed revision control traffic",
 240         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 241     ],
 242     'HKP' => [
 243         "OpenPGP HTTP keyserver protocol traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 245     ],
 246     'HTTP' => [
 247         "Hypertext Transfer Protocol (WWW)",
 248         { action => 'PARAM', proto => 'tcp', dport => '80' },
 249     ],
 250     'HTTPS' => [
 251         "Hypertext Transfer Protocol (WWW) over SSL",
 252         { action => 'PARAM', proto => 'tcp', dport => '443' },
 253     ],
 254     'ICPV2' => [
 255         "Internet Cache Protocol V2 (Squid) traffic",
 256         { action => 'PARAM', proto => 'udp', dport => '3130' },
 257     ],
 258     'ICQ' => [
 259         "AOL Instant Messenger traffic",
 260         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 261     ],
 262     'IMAP' => [
 263         "Internet Message Access Protocol",
 264         { action => 'PARAM', proto => 'tcp', dport => '143' },
 265     ],
 266     'IMAPS' => [
 267         "Internet Message Access Protocol over SSL",
 268         { action => 'PARAM', proto => 'tcp', dport => '993' },
 269     ],
 270     'IPIP' => [
 271         "IPIP capsulation traffic",
 272         { action => 'PARAM', proto => '94' },
 273     ],
 274     'IPsec' => [
 275         "IPsec traffic",
 276         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 277         { action => 'PARAM', proto => '50' },
 278     ],
 279     'IPsecah' => [
 280         "IPsec authentication (AH) traffic",
 281         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 282         { action => 'PARAM', proto => '51' },
 283     ],
 284     'IPsecnat' => [
 285         "IPsec traffic and Nat-Traversal",
 286         { action => 'PARAM', proto => 'udp', dport => '500' },
 287         { action => 'PARAM', proto => 'udp', dport => '4500' },
 288         { action => 'PARAM', proto => '50' },
 289     ],
 290     'IRC' => [
 291         "Internet Relay Chat traffic",
 292         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 293     ],
 294     'Jetdirect' => [
 295         "HP Jetdirect printing",
 296         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 297     ],
 298     'L2TP' => [
 299         "Layer 2 Tunneling Protocol traffic",
 300         { action => 'PARAM', proto => 'udp', dport => '1701' },
 301     ],
 302     'LDAP' => [
 303         "Lightweight Directory Access Protocol traffic",
 304         { action => 'PARAM', proto => 'tcp', dport => '389' },
 305     ],
 306     'LDAPS' => [
 307         "Secure Lightweight Directory Access Protocol traffic",
 308         { action => 'PARAM', proto => 'tcp', dport => '636' },
 309     ],
 310     'MSNP' => [
 311         "Microsoft Notification Protocol",
 312         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 313     ],
 314     'MSSQL' => [
 315         "Microsoft SQL Server",
 316         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 317     ],
 318     'Mail' => [
 319         "Mail traffic (SMTP, SMTPS, Submission)",
 320         { action => 'PARAM', proto => 'tcp', dport => '25' },
 321         { action => 'PARAM', proto => 'tcp', dport => '465' },
 322         { action => 'PARAM', proto => 'tcp', dport => '587' },
 323     ],
 324     'Munin' => [
 325         "Munin networked resource monitoring traffic",
 326         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 327     ],
 328     'MySQL' => [
 329         "MySQL server",
 330         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 331     ],
 332     'NNTP' => [
 333         "NNTP traffic (Usenet).",
 334         { action => 'PARAM', proto => 'tcp', dport => '119' },
 335     ],
 336     'NNTPS' => [
 337         "Encrypted NNTP traffic (Usenet)",
 338         { action => 'PARAM', proto => 'tcp', dport => '563' },
 339     ],
 340     'NTP' => [
 341         "Network Time Protocol (ntpd)",
 342         { action => 'PARAM', proto => 'udp', dport => '123' },
 343     ],
 344     'OSPF' => [
 345         "OSPF multicast traffic",
 346         { action => 'PARAM', proto => '89' },
 347     ],
 348     'OpenVPN' => [
 349         "OpenVPN traffic",
 350         { action => 'PARAM', proto => 'udp', dport => '1194' },
 351     ],
 352     'PCA' => [
 353         "Symantec PCAnywere (tm)",
 354         { action => 'PARAM', proto => 'udp', dport => '5632' },
 355         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 356     ],
 357     'POP3' => [
 358         "POP3 traffic",
 359         { action => 'PARAM', proto => 'tcp', dport => '110' },
 360     ],
 361     'POP3S' => [
 362         "Encrypted POP3 traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '995' },
 364     ],
 365     'PPtP' => [
 366         "Point-to-Point Tunneling Protocol",
 367         { action => 'PARAM', proto => '47' },
 368         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 369     ],
 370     'Ping' => [
 371         "ICMP echo request",
 372         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 373     ],
 374     'PostgreSQL' => [
 375         "PostgreSQL server",
 376         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 377     ],
 378     'Printer' => [
 379         "Line Printer protocol printing",
 380         { action => 'PARAM', proto => 'tcp', dport => '515' },
 381     ],
 382     'RDP' => [
 383         "Microsoft Remote Desktop Protocol traffic",
 384         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 385     ],
 386     'RIP' => [
 387         "Routing Information Protocol (bidirectional)",
 388         { action => 'PARAM', proto => 'udp', dport => '520' },
 389     ],
 390     'RNDC' => [
 391         "BIND remote management protocol",
 392         { action => 'PARAM', proto => 'tcp', dport => '953' },
 393     ],
 394     'Razor' => [
 395         "Razor Antispam System",
 396         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 397     ],
 398     'Rdate' => [
 399         "Remote time retrieval (rdate)",
 400         { action => 'PARAM', proto => 'tcp', dport => '37' },
 401     ],
 402     'Rsync' => [
 403         "Rsync server",
 404         { action => 'PARAM', proto => 'tcp', dport => '873' },
 405     ],
 406     'SANE' => [
 407         "SANE network scanning",
 408         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 409     ],
 410     'SMB' => [
 411         "Microsoft SMB traffic",
 412         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 413         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 414         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 415         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 416     ],
 417     'SMBswat' => [
 418         "Samba Web Administration Tool",
 419         { action => 'PARAM', proto => 'tcp', dport => '901' },
 420     ],
 421     'SMTP' => [
 422         "Simple Mail Transfer Protocol",
 423         { action => 'PARAM', proto => 'tcp', dport => '25' },
 424     ],
 425     'SMTPS' => [
 426         "Encrypted Simple Mail Transfer Protocol",
 427         { action => 'PARAM', proto => 'tcp', dport => '465' },
 428     ],
 429     'SNMP' => [
 430         "Simple Network Management Protocol",
 431         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 432         { action => 'PARAM', proto => 'tcp', dport => '161' },
 433     ],
 434     'SPAMD' => [
 435         "Spam Assassin SPAMD traffic",
 436         { action => 'PARAM', proto => 'tcp', dport => '783' },
 437     ],
 438     'SSH' => [
 439         "Secure shell traffic",
 440         { action => 'PARAM', proto => 'tcp', dport => '22' },
 441     ],
 442     'SVN' => [
 443         "Subversion server (svnserve)",
 444         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 445     ],
 446     'SixXS' => [
 447         "SixXS IPv6 Deployment and Tunnel Broker",
 448         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 449         { action => 'PARAM', proto => 'udp', dport => '3740' },
 450         { action => 'PARAM', proto => '41' },
 451         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 452     ],
 453     'Squid' => [
 454         "Squid web proxy traffic",
 455         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 456     ],
 457     'Submission' => [
 458         "Mail message submission traffic",
 459         { action => 'PARAM', proto => 'tcp', dport => '587' },
 460     ],
 461     'Syslog' => [
 462         "Syslog protocol (RFC 5424) traffic",
 463         { action => 'PARAM', proto => 'udp', dport => '514' },
 464         { action => 'PARAM', proto => 'tcp', dport => '514' },
 465     ],
 466     'TFTP' => [
 467         "Trivial File Transfer Protocol traffic",
 468         { action => 'PARAM', proto => 'udp', dport => '69' },
 469     ],
 470     'Telnet' => [
 471         "Telnet traffic",
 472         { action => 'PARAM', proto => 'tcp', dport => '23' },
 473     ],
 474     'Telnets' => [
 475         "Telnet over SSL",
 476         { action => 'PARAM', proto => 'tcp', dport => '992' },
 477     ],
 478     'Time' => [
 479         "RFC 868 Time protocol",
 480         { action => 'PARAM', proto => 'tcp', dport => '37' },
 481     ],
 482     'Trcrt' => [
 483         "Traceroute (for up to 30 hops) traffic",
 484         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 485         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 486     ],
 487     'VNC' => [
 488         "VNC traffic for VNC display's 0 - 99",
 489         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 490     ],
 491     'VNCL' => [
 492         "VNC traffic from Vncservers to Vncviewers in listen mode",
 493         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 494     ],
 495     'Web' => [
 496         "WWW traffic (HTTP and HTTPS)",
 497         { action => 'PARAM', proto => 'tcp', dport => '80' },
 498         { action => 'PARAM', proto => 'tcp', dport => '443' },
 499     ],
 500     'Webcache' => [
 501         "Web Cache/Proxy traffic (port 8080)",
 502         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 503     ],
 504     'Webmin' => [
 505         "Webmin traffic",
 506         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 507     ],
 508     'Whois' => [
 509         "Whois (nicname, RFC 3912) traffic",
 510         { action => 'PARAM', proto => 'tcp', dport => '43' },
 511     ],
 512 };
 513
 514 my $pve_fw_parsed_macros;
 515 my $pve_fw_macro_descr;
 516 my $pve_fw_macro_ipversion = {};
 517 my $pve_fw_preferred_macro_names = {};
 518
 519 my $pve_std_chains = {};
 520 $pve_std_chains->{4} = {
 521     'PVEFW-SET-ACCEPT-MARK' => [
 522         "-j MARK --set-mark 1",
 523     ],
 524     'PVEFW-DropBroadcast' => [
 525         # same as shorewall 'Broadcast'
 526         # simply DROP BROADCAST/MULTICAST/ANYCAST
 527         # we can use this to reduce logging
 528         { action => 'DROP', dsttype => 'BROADCAST' },
 529         { action => 'DROP', dsttype => 'MULTICAST' },
 530         { action => 'DROP', dsttype => 'ANYCAST' },
 531         { action => 'DROP', dest => '224.0.0.0/4' },
 532     ],
 533     'PVEFW-reject' => [
 534         # same as shorewall 'reject'
 535         { action => 'DROP', dsttype => 'BROADCAST' },
 536         { action => 'DROP', source => '224.0.0.0/4' },
 537         { action => 'DROP', proto => 'icmp' },
 538         "-p tcp -j REJECT --reject-with tcp-reset",
 539         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 540         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 541         "-j REJECT --reject-with icmp-host-prohibited",
 542     ],
 543     'PVEFW-Drop' => [
 544         # same as shorewall 'Drop', which is equal to DROP,
 545         # but REJECT/DROP some packages to reduce logging,
 546         # and ACCEPT critical ICMP types
 547         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 548         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 549         { action => 'PVEFW-DropBroadcast' },
 550         # ACCEPT critical ICMP types
 551         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 552         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 553         # Drop packets with INVALID state
 554         "-m conntrack --ctstate INVALID -j DROP",
 555         # Drop Microsoft SMB noise
 556         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 557         { action => 'DROP', proto => 'udp', dport => '137:139'},
 558         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 559         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 560         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 561         # Drop new/NotSyn traffic so that it doesn't get logged
 562         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 563         # Drop DNS replies
 564         { action => 'DROP', proto => 'udp', sport => 53 },
 565     ],
 566     'PVEFW-Reject' => [
 567         # same as shorewall 'Reject', which is equal to Reject,
 568         # but REJECT/DROP some packages to reduce logging,
 569         # and ACCEPT critical ICMP types
 570         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 571         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 572         { action => 'PVEFW-DropBroadcast' },
 573         # ACCEPT critical ICMP types
 574         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 575         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 576         # Drop packets with INVALID state
 577         "-m conntrack --ctstate INVALID -j DROP",
 578         # Drop Microsoft SMB noise
 579         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 580         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 581         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 582         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 583         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 584         # Drop new/NotSyn traffic so that it doesn't get logged
 585         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 586         # Drop DNS replies
 587         { action => 'DROP', proto => 'udp', sport => 53 },
 588     ],
 589     'PVEFW-tcpflags' => [
 590         # same as shorewall tcpflags action.
 591         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 592         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 593         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 594         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 595         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 596         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 597     ],
 598     'PVEFW-smurfs' => [
 599         # same as shorewall smurfs action
 600         # Filter packets for smurfs (packets with a broadcast address as the source).
 601         "-s 0.0.0.0/32 -j RETURN", # allow DHCP
 602         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 603         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 604     ],
 605 };
 606
 607 $pve_std_chains->{6} = {
 608     'PVEFW-SET-ACCEPT-MARK' => [
 609         "-j MARK --set-mark 1",
 610     ],
 611     'PVEFW-DropBroadcast' => [
 612         # same as shorewall 'Broadcast'
 613         # simply DROP BROADCAST/MULTICAST/ANYCAST
 614         # we can use this to reduce logging
 615         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 616         # ipv6 addrtype does not work with kernel 2.6.32
 617         #{ action => 'DROP', dsttype => 'MULTICAST' },
 618         #{ action => 'DROP', dsttype => 'ANYCAST' },
 619         { action => 'DROP', dest => 'ff00::/8' },
 620         #{ action => 'DROP', dest => '224.0.0.0/4' },
 621     ],
 622     'PVEFW-reject' => [
 623         # same as shorewall 'reject'
 624         #{ action => 'DROP', dsttype => 'BROADCAST' },
 625         #{ action => 'DROP', source => '224.0.0.0/4' },
 626         { action => 'DROP', proto => 'icmpv6' },
 627         "-p tcp -j REJECT --reject-with tcp-reset",
 628         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 629         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 630         #"-j REJECT --reject-with icmp-host-prohibited",
 631     ],
 632     'PVEFW-Drop' => [
 633         # same as shorewall 'Drop', which is equal to DROP,
 634         # but REJECT/DROP some packages to reduce logging,
 635         # and ACCEPT critical ICMP types
 636         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 637         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 638         { action => 'PVEFW-DropBroadcast' },
 639         # ACCEPT critical ICMP types
 640         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 641         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 642         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 643
 644         # Drop packets with INVALID state
 645         "-m conntrack --ctstate INVALID -j DROP",
 646         # Drop Microsoft SMB noise
 647         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 648         { action => 'DROP', proto => 'udp', dport => '137:139'},
 649         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 650         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 651         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 652         # Drop new/NotSyn traffic so that it doesn't get logged
 653         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 654         # Drop DNS replies
 655         { action => 'DROP', proto => 'udp', sport => 53 },
 656     ],
 657     'PVEFW-Reject' => [
 658         # same as shorewall 'Reject', which is equal to Reject,
 659         # but REJECT/DROP some packages to reduce logging,
 660         # and ACCEPT critical ICMP types
 661         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 662         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 663         { action => 'PVEFW-DropBroadcast' },
 664         # ACCEPT critical ICMP types
 665         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 666         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 667         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 668
 669         # Drop packets with INVALID state
 670         "-m conntrack --ctstate INVALID -j DROP",
 671         # Drop Microsoft SMB noise
 672         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 673         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 674         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 675         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 676         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 677         # Drop new/NotSyn traffic so that it doesn't get logged
 678         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 679         # Drop DNS replies
 680         { action => 'DROP', proto => 'udp', sport => 53 },
 681     ],
 682     'PVEFW-tcpflags' => [
 683         # same as shorewall tcpflags action.
 684         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 685         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 686         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 687         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 688         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 689         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 690     ],
 691 };
 692
 693 # iptables -p icmp -h
 694 my $icmp_type_names = {
 695     any => 1,
 696     'echo-reply' => 1,
 697     'destination-unreachable' => 1,
 698     'network-unreachable' => 1,
 699     'host-unreachable' => 1,
 700     'protocol-unreachable' => 1,
 701     'port-unreachable' => 1,
 702     'fragmentation-needed' => 1,
 703     'source-route-failed' => 1,
 704     'network-unknown' => 1,
 705     'host-unknown' => 1,
 706     'network-prohibited' => 1,
 707     'host-prohibited' => 1,
 708     'TOS-network-unreachable' => 1,
 709     'TOS-host-unreachable' => 1,
 710     'communication-prohibited' => 1,
 711     'host-precedence-violation' => 1,
 712     'precedence-cutoff' => 1,
 713     'source-quench' => 1,
 714     'redirect' => 1,
 715     'network-redirect' => 1,
 716     'host-redirect' => 1,
 717     'TOS-network-redirect' => 1,
 718     'TOS-host-redirect' => 1,
 719     'echo-request' => 1,
 720     'router-advertisement' => 1,
 721     'router-solicitation' => 1,
 722     'time-exceeded' => 1,
 723     'ttl-zero-during-transit' => 1,
 724     'ttl-zero-during-reassembly' => 1,
 725     'parameter-problem' => 1,
 726     'ip-header-bad' => 1,
 727     'required-option-missing' => 1,
 728     'timestamp-request' => 1,
 729     'timestamp-reply' => 1,
 730     'address-mask-request' => 1,
 731     'address-mask-reply' => 1,
 732 };
 733
 734 # ip6tables -p icmpv6 -h
 735
 736 my $icmpv6_type_names = {
 737     'any' => 1,
 738     'destination-unreachable' => 1,
 739     'no-route' => 1,
 740     'communication-prohibited' => 1,
 741     'address-unreachable' => 1,
 742     'port-unreachable' => 1,
 743     'packet-too-big' => 1,
 744     'time-exceeded' => 1,
 745     'ttl-zero-during-transit' => 1,
 746     'ttl-zero-during-reassembly' => 1,
 747     'parameter-problem' => 1,
 748     'bad-header' => 1,
 749     'unknown-header-type' => 1,
 750     'unknown-option' => 1,
 751     'echo-request' => 1,
 752     'echo-reply' => 1,
 753     'router-solicitation' => 1,
 754     'router-advertisement' => 1,
 755     'neighbor-solicitation' => 1,
 756     'neighbour-solicitation' => 1,
 757     'neighbor-advertisement' => 1,
 758     'neighbour-advertisement' => 1,
 759     'redirect' => 1,
 760 };
 761
 762 sub init_firewall_macros {
 763
 764     $pve_fw_parsed_macros = {};
 765
 766     my $parse = sub {
 767         my ($k, $macro) = @_;
 768         my $lc_name = lc($k);
 769         $pve_fw_macro_ipversion->{$k} = 0;
 770         while (!ref($macro->[0])) {
 771             my $desc = shift @$macro;
 772             if ($desc eq 'ipv4only') {
 773                 $pve_fw_macro_ipversion->{$k} = 4;
 774             } elsif ($desc eq 'ipv6only') {
 775                 $pve_fw_macro_ipversion->{$k} = 6;
 776             } else {
 777                 $pve_fw_macro_descr->{$k} = $desc;
 778             }
 779         }
 780         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 781         $pve_fw_parsed_macros->{$k} = $macro;
 782     };
 783
 784     foreach my $k (keys %$pve_fw_macros) {
 785         &$parse($k, $pve_fw_macros->{$k});
 786     }
 787
 788     foreach my $k (keys %$pve_ipv6fw_macros) {
 789         next if $pve_fw_parsed_macros->{$k};
 790         &$parse($k, $pve_ipv6fw_macros->{$k});
 791         $pve_fw_macro_ipversion->{$k} = 6;
 792     }
 793 }
 794
 795 init_firewall_macros();
 796
 797 sub get_macros {
 798     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 799 }
 800
 801 my $etc_services;
 802
 803 sub get_etc_services {
 804
 805     return $etc_services if $etc_services;
 806
 807     my $filename = "/etc/services";
 808
 809     my $fh = IO::File->new($filename, O_RDONLY);
 810     if (!$fh) {
 811         warn "unable to read '$filename' - $!\n";
 812         return {};
 813     }
 814
 815     my $services = {};
 816
 817     while (my $line = <$fh>) {
 818         chomp ($line);
 819         next if $line =~m/^#/;
 820         next if ($line =~m/^\s*$/);
 821
 822         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 823             $services->{byid}->{$2}->{name} = $1;
 824             $services->{byid}->{$2}->{port} = $2;
 825             $services->{byid}->{$2}->{$3} = 1;
 826             $services->{byname}->{$1} = $services->{byid}->{$2};
 827         }
 828     }
 829
 830     close($fh);
 831
 832     $etc_services = $services;
 833
 834
 835     return $etc_services;
 836 }
 837
 838 my $etc_protocols;
 839
 840 sub get_etc_protocols {
 841     return $etc_protocols if $etc_protocols;
 842
 843     my $filename = "/etc/protocols";
 844
 845     my $fh = IO::File->new($filename, O_RDONLY);
 846     if (!$fh) {
 847         warn "unable to read '$filename' - $!\n";
 848         return {};
 849     }
 850
 851     my $protocols = {};
 852
 853     while (my $line = <$fh>) {
 854         chomp ($line);
 855         next if $line =~m/^#/;
 856         next if ($line =~m/^\s*$/);
 857
 858         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 859             $protocols->{byid}->{$2}->{name} = $1;
 860             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 861         }
 862     }
 863
 864     close($fh);
 865
 866     # add special case for ICMP v6
 867     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 868     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 869
 870     $etc_protocols = $protocols;
 871
 872     return $etc_protocols;
 873 }
 874
 875 my $ipv4_mask_hash_localnet = {
 876     '255.255.0.0' => 16,
 877     '255.255.128.0' => 17,
 878     '255.255.192.0' => 18,
 879     '255.255.224.0' => 19,
 880     '255.255.240.0' => 20,
 881     '255.255.248.0' => 21,
 882     '255.255.252.0' => 22,
 883     '255.255.254.0' => 23,
 884     '255.255.255.0' => 24,
 885     '255.255.255.128' => 25,
 886     '255.255.255.192' => 26,
 887     '255.255.255.224' => 27,
 888     '255.255.255.240' => 28,
 889     '255.255.255.248' => 29,
 890     '255.255.255.252' => 30,
 891 };
 892
 893 my $__local_network;
 894
 895 sub local_network {
 896     my ($new_value) = @_;
 897
 898     $__local_network = $new_value if defined($new_value);
 899
 900     return $__local_network if defined($__local_network);
 901
 902     eval {
 903         my $nodename = PVE::INotify::nodename();
 904
 905         my $ip = PVE::Cluster::remote_node_ip($nodename);
 906
 907         my $testip = Net::IP->new($ip);
 908
 909         my $isv6 = $testip->version == 6;
 910         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 911                            : PVE::ProcFSTools::read_proc_net_route();
 912         foreach my $entry (@$routes) {
 913             my $mask;
 914             if ($isv6) {
 915                 $mask = $entry->{prefix};
 916             } else {
 917                 $mask = $ipv4_mask_hash_localnet->{$entry->{mask}};
 918                 next if !defined($mask);
 919             }
 920             my $cidr = "$entry->{dest}/$mask";
 921             my $testnet = Net::IP->new($cidr);
 922             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 923                 $__local_network = $cidr;
 924                 return;
 925             }
 926         }
 927     };
 928     warn $@ if $@;
 929
 930     return $__local_network;
 931 }
 932
 933 # ipset names are limited to 31 characters,
 934 # and we use '-v4' or '-v6' to indicate IP versions,
 935 # and we use '_swap' suffix for atomic update,
 936 # for example PVEFW-${VMID}-${ipset_name}_swap
 937
 938 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 939
 940 sub compute_ipset_chain_name {
 941     my ($vmid, $ipset_name, $ipversion) = @_;
 942
 943     $vmid = 0 if !defined($vmid);
 944
 945     my $id = "$vmid-${ipset_name}-v$ipversion";
 946
 947     if (length($id) > $max_iptables_ipset_name_length) {
 948         $id = PVE::Tools::fnv31a_hex($id);
 949     }
 950
 951     return "PVEFW-$id";
 952 }
 953
 954 sub compute_ipfilter_ipset_name {
 955     my ($iface) = @_;
 956
 957     return "ipfilter-$iface";
 958 }
 959
 960 sub parse_address_list {
 961     my ($str) = @_;
 962
 963     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 964         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 965         return;
 966     }
 967
 968     if ($str =~ m/^${ip_alias_pattern}$/) {
 969         die "alias name too long\n" if length($str) > $max_alias_name_length;
 970         return;
 971     }
 972
 973     my $count = 0;
 974     my $iprange = 0;
 975     my $ipversion;
 976
 977     foreach my $elem (split(/,/, $str)) {
 978         $count++;
 979         my $ip = Net::IP->new($elem);
 980         if (!$ip) {
 981             my $err = Net::IP::Error();
 982             die "invalid IP address: $err\n";
 983         }
 984         $iprange = 1 if $elem =~ m/-/;
 985
 986         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 987
 988         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 989             if $ipversion && ($new_ipversion != $ipversion);
 990
 991         $ipversion = $new_ipversion;
 992     }
 993
 994     die "you can't use a range in a list\n" if $iprange && $count > 1;
 995
 996     return $ipversion;
 997 }
 998
 999 sub parse_port_name_number_or_range {
1000     my ($str, $dport) = @_;
1001
1002     my $services = PVE::Firewall::get_etc_services();
1003     my $count = 0;
1004     my $icmp_port = 0;
1005
1006     foreach my $item (split(/,/, $str)) {
1007         $count++;
1008         if ($item =~ m/^(\d+):(\d+)$/) {
1009             my ($port1, $port2) = ($1, $2);
1010             die "invalid port '$port1'\n" if $port1 > 65535;
1011             die "invalid port '$port2'\n" if $port2 > 65535;
1012         } elsif ($item =~ m/^(\d+)$/) {
1013             my $port = $1;
1014             die "invalid port '$port'\n" if $port > 65535;
1015         } else {
1016             if ($dport && $icmp_type_names->{$item}) {
1017                 $icmp_port = 1;
1018             } elsif ($dport && $icmpv6_type_names->{$item}) {
1019                 $icmp_port = 1;
1020             } else {
1021                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1022             }
1023         }
1024     }
1025
1026     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1027
1028     return $count;
1029 }
1030
1031 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1032 sub pve_fw_verify_sport_spec {
1033    my ($portstr) = @_;
1034
1035    parse_port_name_number_or_range($portstr, 0);
1036
1037    return $portstr;
1038 }
1039
1040 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1041 sub pve_fw_verify_dport_spec {
1042    my ($portstr) = @_;
1043
1044    parse_port_name_number_or_range($portstr, 1);
1045
1046    return $portstr;
1047 }
1048
1049 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1050 sub pve_fw_verify_addr_spec {
1051    my ($list) = @_;
1052
1053    parse_address_list($list);
1054
1055    return $list;
1056 }
1057
1058 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1059 sub pve_fw_verify_protocol_spec {
1060    my ($proto) = @_;
1061
1062    my $protocols = get_etc_protocols();
1063
1064    die "unknown protocol '$proto'\n" if $proto &&
1065        !(defined($protocols->{byname}->{$proto}) ||
1066          defined($protocols->{byid}->{$proto}));
1067
1068    return $proto;
1069 }
1070
1071
1072 # helper function for API
1073
1074 sub copy_opject_with_digest {
1075     my ($object) = @_;
1076
1077     my $sha = Digest::SHA->new('sha1');
1078
1079     my $res = {};
1080     foreach my $k (sort keys %$object) {
1081         my $v = $object->{$k};
1082         next if !defined($v);
1083         $res->{$k} = $v;
1084         $sha->add($k, ':', $v, "\n");
1085     }
1086
1087     my $digest = $sha->hexdigest;
1088
1089     $res->{digest} = $digest;
1090
1091     return wantarray ? ($res, $digest) : $res;
1092 }
1093
1094 sub copy_list_with_digest {
1095     my ($list) = @_;
1096
1097     my $sha = Digest::SHA->new('sha1');
1098
1099     my $res = [];
1100     foreach my $entry (@$list) {
1101         my $data = {};
1102         foreach my $k (sort keys %$entry) {
1103             my $v = $entry->{$k};
1104             next if !defined($v);
1105             $data->{$k} = $v;
1106             # Note: digest ignores refs ($rule->{errors})
1107             # since Digest::SHA expects a series of bytes,
1108             #  we have to encode the value here to prevent errors when
1109             #  using utf8 characters (eg. in comments)
1110             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1111         }
1112         push @$res, $data;
1113     }
1114
1115     my $digest = $sha->hexdigest;
1116
1117     foreach my $entry (@$res) {
1118         $entry->{digest} = $digest;
1119     }
1120
1121     return wantarray ? ($res, $digest) : $res;
1122 }
1123
1124
1125 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.";
1126
1127 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.";
1128
1129 my $rule_properties = {
1130     pos => {
1131         description => "Update rule at position <pos>.",
1132         type => 'integer',
1133         minimum => 0,
1134         optional => 1,
1135     },
1136     digest => get_standard_option('pve-config-digest'),
1137     type => {
1138         type => 'string',
1139         optional => 1,
1140         enum => ['in', 'out', 'group'],
1141     },
1142     action => {
1143         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1144         type => 'string',
1145         optional => 1,
1146         pattern => $security_group_name_pattern,
1147         maxLength => 20,
1148         minLength => 2,
1149     },
1150     macro => {
1151         type => 'string',
1152         optional => 1,
1153         maxLength => 128,
1154     },
1155     iface => get_standard_option('pve-iface', {
1156         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.",
1157         optional => 1
1158     }),
1159     source => {
1160         description => "Restrict packet source address. $addr_list_descr",
1161         type => 'string', format => 'pve-fw-addr-spec',
1162         optional => 1,
1163     },
1164     dest => {
1165         description => "Restrict packet destination address. $addr_list_descr",
1166         type => 'string', format => 'pve-fw-addr-spec',
1167         optional => 1,
1168     },
1169     proto => {
1170         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1171         type => 'string', format => 'pve-fw-protocol-spec',
1172         optional => 1,
1173     },
1174     enable => {
1175         type => 'integer',
1176         minimum => 0,
1177         optional => 1,
1178     },
1179     sport => {
1180         description => "Restrict TCP/UDP source port. $port_descr",
1181         type => 'string', format => 'pve-fw-sport-spec',
1182         optional => 1,
1183     },
1184     dport => {
1185         description => "Restrict TCP/UDP destination port. $port_descr",
1186         type => 'string', format => 'pve-fw-dport-spec',
1187         optional => 1,
1188     },
1189     comment => {
1190         type => 'string',
1191         optional => 1,
1192     },
1193 };
1194
1195 sub add_rule_properties {
1196     my ($properties) = @_;
1197
1198     foreach my $k (keys %$rule_properties) {
1199         my $h = $rule_properties->{$k};
1200         # copy data, so that we can modify later without side effects
1201         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1202     }
1203
1204     return $properties;
1205 }
1206
1207 sub delete_rule_properties {
1208     my ($rule, $delete_str) = @_;
1209
1210     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1211         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1212             if !defined($rule_properties->{$opt});
1213         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1214             if $opt eq 'type' || $opt eq 'action';
1215         delete $rule->{$opt};
1216     }
1217
1218     return $rule;
1219 }
1220
1221 my $apply_macro = sub {
1222     my ($macro_name, $param, $verify, $ipversion) = @_;
1223
1224     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1225     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1226
1227     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1228         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1229     }
1230
1231     # skip macros which are specific to another ipversion
1232     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1233         return if $ipversion != $required;
1234     }
1235
1236     my $rules = [];
1237
1238     foreach my $templ (@$macro_rules) {
1239         my $rule = {};
1240         my $param_used = {};
1241         foreach my $k (keys %$templ) {
1242             my $v = $templ->{$k};
1243             if ($v eq 'PARAM') {
1244                 $v = $param->{$k};
1245                 $param_used->{$k} = 1;
1246             } elsif ($v eq 'DEST') {
1247                 $v = $param->{dest};
1248                 $param_used->{dest} = 1;
1249             } elsif ($v eq 'SOURCE') {
1250                 $v = $param->{source};
1251                 $param_used->{source} = 1;
1252             }
1253
1254             if (!defined($v)) {
1255                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1256                 raise_param_exc({ macro => $msg }) if $verify;
1257                 die "$msg\n";
1258             }
1259             $rule->{$k} = $v;
1260         }
1261         foreach my $k (keys %$param) {
1262             next if $k eq 'macro';
1263             next if !defined($param->{$k});
1264             next if $param_used->{$k};
1265             if (defined($rule->{$k})) {
1266                 if ($rule->{$k} ne $param->{$k}) {
1267                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1268                     raise_param_exc({ $k => $msg }) if $verify;
1269                     die "$msg\n";
1270                 }
1271             } else {
1272                 $rule->{$k} = $param->{$k};
1273             }
1274         }
1275         push @$rules, $rule;
1276     }
1277
1278     return $rules;
1279 };
1280
1281 my $rule_env_iface_lookup = {
1282     'ct' => 1,
1283     'vm' => 1,
1284     'group' => 0,
1285     'cluster' => 1,
1286     'host' => 1,
1287 };
1288
1289 sub verify_rule {
1290     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1291
1292     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1293
1294     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1295     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1296
1297     my $errors = $rule->{errors} || {};
1298
1299     my $error_count = 0;
1300
1301     my $add_error = sub {
1302         my ($param, $msg)  = @_;
1303         chomp $msg;
1304         raise_param_exc({ $param => $msg }) if !$noerr;
1305         $error_count++;
1306         $errors->{$param} = $msg if !$errors->{$param};
1307     };
1308
1309     my $ipversion;
1310     my $set_ip_version = sub {
1311         my $vers = shift;
1312         if ($vers) {
1313             die "detected mixed ipv4/ipv6 adresses in rule\n"
1314                 if $ipversion && ($vers != $ipversion);
1315             $ipversion = $vers;
1316         }
1317     };
1318
1319     my $check_ipset_or_alias_property = sub {
1320         my ($name, $expected_ipversion) = @_;
1321
1322         if (my $value = $rule->{$name}) {
1323             if ($value =~ m/^\+/) {
1324                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1325                     &$add_error($name, "no such ipset '$1'")
1326                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1327
1328                 } else {
1329                     &$add_error($name, "invalid ipset name '$value'");
1330                 }
1331             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1332                 my $alias = lc($value);
1333                 &$add_error($name, "no such alias '$value'")
1334                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1335                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1336                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1337
1338                 &$set_ip_version($e->{ipversion});
1339             }
1340         }
1341     };
1342
1343     my $type = $rule->{type};
1344     my $action = $rule->{action};
1345
1346     &$add_error('type', "missing property") if !$type;
1347     &$add_error('action', "missing property") if !$action;
1348
1349     if ($type) {
1350         if ($type eq  'in' || $type eq 'out') {
1351             &$add_error('action', "unknown action '$action'")
1352                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1353         } elsif ($type eq 'group') {
1354             &$add_error('type', "security groups not allowed")
1355                 if !$allow_groups;
1356             &$add_error('action', "invalid characters in security group name")
1357                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1358         } else {
1359             &$add_error('type', "unknown rule type '$type'");
1360         }
1361     }
1362
1363     if ($rule->{iface}) {
1364         &$add_error('type', "parameter -i not allowed for this rule type")
1365             if !$allow_iface;
1366         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1367         &$add_error('iface', $@) if $@;
1368         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1369             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1370                 if $rule->{iface} !~  m/^net(\d+)$/;
1371         }
1372     }
1373
1374     if ($rule->{macro}) {
1375         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1376             $rule->{macro} = $preferred_name;
1377         } else {
1378             &$add_error('macro', "unknown macro '$rule->{macro}'");
1379         }
1380     }
1381
1382     if ($rule->{proto}) {
1383         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1384         &$add_error('proto', $@) if $@;
1385         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1386         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1387     }
1388
1389     if ($rule->{dport}) {
1390         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1391         &$add_error('dport', $@) if $@;
1392         &$add_error('proto', "missing property - 'dport' requires this property")
1393             if !$rule->{proto};
1394     }
1395
1396     if ($rule->{sport}) {
1397         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1398         &$add_error('sport', $@) if $@;
1399         &$add_error('proto', "missing property - 'sport' requires this property")
1400             if !$rule->{proto};
1401     }
1402
1403     if ($rule->{source}) {
1404         eval {
1405             my $source_ipversion = parse_address_list($rule->{source});
1406             &$set_ip_version($source_ipversion);
1407         };
1408         &$add_error('source', $@) if $@;
1409         &$check_ipset_or_alias_property('source', $ipversion);
1410     }
1411
1412     if ($rule->{dest}) {
1413         eval {
1414             my $dest_ipversion = parse_address_list($rule->{dest});
1415             &$set_ip_version($dest_ipversion);
1416         };
1417         &$add_error('dest', $@) if $@;
1418         &$check_ipset_or_alias_property('dest', $ipversion);
1419     }
1420
1421     $rule->{ipversion} = $ipversion if $ipversion;
1422
1423     if ($rule->{macro} && !$error_count) {
1424         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1425         if (my $err = $@) {
1426             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1427                 my $eh = $err->{errors};
1428                 foreach my $p (keys %$eh) {
1429                     &$add_error($p, $eh->{$p});
1430                 }
1431             } else {
1432                 &$add_error('macro', "$err");
1433             }
1434         }
1435     }
1436
1437     $rule->{errors} = $errors if $error_count;
1438
1439     return $rule;
1440 }
1441
1442 sub copy_rule_data {
1443     my ($rule, $param) = @_;
1444
1445     foreach my $k (keys %$rule_properties) {
1446         if (defined(my $v = $param->{$k})) {
1447             if ($v eq '' || $v eq '-') {
1448                 delete $rule->{$k};
1449             } else {
1450                 $rule->{$k} = $v;
1451             }
1452         }
1453     }
1454
1455     return $rule;
1456 }
1457
1458 sub rules_modify_permissions {
1459     my ($rule_env) = @_;
1460
1461     if ($rule_env eq 'host') {
1462         return {
1463             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1464         };
1465     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1466         return {
1467             check => ['perm', '/', [ 'Sys.Modify' ]],
1468         };
1469     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1470         return {
1471             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1472         }
1473     }
1474
1475     return undef;
1476 }
1477
1478 sub rules_audit_permissions {
1479     my ($rule_env) = @_;
1480
1481     if ($rule_env eq 'host') {
1482         return {
1483             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1484         };
1485     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1486         return {
1487             check => ['perm', '/', [ 'Sys.Audit' ]],
1488         };
1489     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1490         return {
1491             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1492         }
1493     }
1494
1495     return undef;
1496 }
1497
1498 # core functions
1499 my $bridge_firewall_enabled = 0;
1500
1501 sub enable_bridge_firewall {
1502
1503     return if $bridge_firewall_enabled; # only once
1504
1505     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1506     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1507
1508     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1509     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1510
1511     $bridge_firewall_enabled = 1;
1512 }
1513
1514 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1515
1516 sub iptables_restore_cmdlist {
1517     my ($cmdlist) = @_;
1518
1519     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1520 }
1521
1522 sub ip6tables_restore_cmdlist {
1523     my ($cmdlist) = @_;
1524
1525     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1526 }
1527
1528 sub ipset_restore_cmdlist {
1529     my ($cmdlist) = @_;
1530
1531     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1532 }
1533
1534 sub iptables_get_chains {
1535     my ($iptablescmd) = @_;
1536
1537     $iptablescmd = "iptables" if !$iptablescmd;
1538
1539     my $res = {};
1540
1541     # check what chains we want to track
1542     my $is_pvefw_chain = sub {
1543         my $name = shift;
1544
1545         return 1 if $name =~ m/^PVEFW-\S+$/;
1546
1547         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1548
1549         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1550
1551         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1552         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1553
1554         return undef;
1555     };
1556
1557     my $table = '';
1558
1559     my $hooks = {};
1560
1561     my $parser = sub {
1562         my $line = shift;
1563
1564         return if $line =~ m/^#/;
1565         return if $line =~ m/^\s*$/;
1566
1567         if ($line =~ m/^\*(\S+)$/) {
1568             $table = $1;
1569             return;
1570         }
1571
1572         return if $table ne 'filter';
1573
1574         if ($line =~ m/^:(\S+)\s/) {
1575             my $chain = $1;
1576             return if !&$is_pvefw_chain($chain);
1577             $res->{$chain} = "unknown";
1578         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1579             my ($chain, $sig) = ($1, $2);
1580             return if !&$is_pvefw_chain($chain);
1581             $res->{$chain} = $sig;
1582         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1583             $hooks->{$1} = 1;
1584         } else {
1585             # simply ignore the rest
1586             return;
1587         }
1588     };
1589
1590     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1591
1592     return wantarray ? ($res, $hooks) : $res;
1593 }
1594
1595 sub iptables_chain_digest {
1596     my ($rules) = @_;
1597     my $digest = Digest::SHA->new('sha1');
1598     foreach my $rule (@$rules) { # order is important
1599         $digest->add($rule);
1600     }
1601     return $digest->b64digest;
1602 }
1603
1604 sub ipset_chain_digest {
1605     my ($rules) = @_;
1606
1607     my $digest = Digest::SHA->new('sha1');
1608     foreach my $rule (sort @$rules) { # note: sorted
1609         $digest->add($rule);
1610     }
1611     return $digest->b64digest;
1612 }
1613
1614 sub ipset_get_chains {
1615
1616     my $res = {};
1617     my $chains = {};
1618
1619     my $parser = sub {
1620         my $line = shift;
1621
1622         return if $line =~ m/^#/;
1623         return if $line =~ m/^\s*$/;
1624         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1625             my $chain = $1;
1626             $line =~ s/\s+$//; # delete trailing white space
1627             push @{$chains->{$chain}}, $line;
1628         } else {
1629             # simply ignore the rest
1630             return;
1631         }
1632     };
1633
1634     run_command("/sbin/ipset save", outfunc => $parser);
1635
1636     # compute digest for each chain
1637     foreach my $chain (keys %$chains) {
1638         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1639     }
1640
1641     return $res;
1642 }
1643
1644 sub ruleset_generate_cmdstr {
1645     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1646
1647     return if defined($rule->{enable}) && !$rule->{enable};
1648     return if $rule->{errors};
1649
1650     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1651
1652     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1653     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1654
1655     my @cmd = ();
1656
1657     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1658     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1659
1660     my $source = $rule->{source};
1661     my $dest = $rule->{dest};
1662
1663     if ($source) {
1664         if ($source =~ m/^\+/) {
1665             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1666                 my $name = $1;
1667                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1668                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1669                     push @cmd, "-m set --match-set ${ipset_chain} src";
1670                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1671                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1672                     push @cmd, "-m set --match-set ${ipset_chain} src";
1673                 } else {
1674                     die "no such ipset '$name'\n";
1675                 }
1676             } else {
1677                 die "invalid security group name '$source'\n";
1678             }
1679         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1680             my $alias = lc($source);
1681             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1682             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1683             die "no such alias '$source'\n" if !$e;
1684             push @cmd, "-s $e->{cidr}";
1685         } elsif ($source =~ m/\-/){
1686             push @cmd, "-m iprange --src-range $source";
1687         } else {
1688             push @cmd, "-s $source";
1689         }
1690     }
1691
1692     if ($dest) {
1693         if ($dest =~ m/^\+/) {
1694             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1695                 my $name = $1;
1696                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1697                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1698                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1699                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1700                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1701                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1702                 } else {
1703                     die "no such ipset '$name'\n";
1704                 }
1705             } else {
1706                 die "invalid security group name '$dest'\n";
1707             }
1708         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1709             my $alias = lc($dest);
1710             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1711             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1712             die "no such alias '$dest'\n" if !$e;
1713             push @cmd, "-d $e->{cidr}";
1714         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1715             push @cmd, "-m iprange --dst-range $dest";
1716         } else {
1717             push @cmd, "-d $dest";
1718         }
1719     }
1720
1721     if ($rule->{proto}) {
1722         push @cmd, "-p $rule->{proto}";
1723
1724         my $multiport = 0;
1725         $multiport++ if $nbdport > 1;
1726         $multiport++ if $nbsport > 1;
1727
1728         push @cmd, "--match multiport" if $multiport;
1729
1730         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1731             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1732
1733         if ($rule->{dport}) {
1734             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1735                 # Note: we use dport to store --icmp-type
1736                 die "unknown icmp-type '$rule->{dport}'\n"
1737                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1738                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1739             } elsif ($rule->{proto} && $rule->{proto} eq 'icmpv6') {
1740                 # Note: we use dport to store --icmpv6-type
1741                 die "unknown icmpv6-type '$rule->{dport}'\n"
1742                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1743                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1744             } else {
1745                 if ($nbdport > 1) {
1746                     if ($multiport == 2) {
1747                         push @cmd,  "--ports $rule->{dport}";
1748                     } else {
1749                         push @cmd, "--dports $rule->{dport}";
1750                     }
1751                 } else {
1752                     push @cmd, "--dport $rule->{dport}";
1753                 }
1754             }
1755         }
1756
1757         if ($rule->{sport}) {
1758             if ($nbsport > 1) {
1759                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1760             } else {
1761                 push @cmd, "--sport $rule->{sport}";
1762             }
1763         }
1764     } elsif ($rule->{dport} || $rule->{sport}) {
1765         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1766         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1767     }
1768
1769     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1770
1771     if (my $action = $rule->{action}) {
1772         $action = $actions->{$action} if defined($actions->{$action});
1773         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1774         push @cmd, $goto ? "-g $action" : "-j $action";
1775     }
1776
1777     return scalar(@cmd) ? join(' ', @cmd) : undef;
1778 }
1779
1780 sub ruleset_generate_rule {
1781     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1782
1783     my $rules;
1784
1785     if ($rule->{macro}) {
1786         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1787     } else {
1788         $rules = [ $rule ];
1789     }
1790
1791     # update all or nothing
1792
1793     my @cmds = ();
1794     foreach my $tmp (@$rules) {
1795         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1796             push @cmds, $cmdstr;
1797         }
1798     }
1799
1800     foreach my $cmdstr (@cmds) {
1801         ruleset_addrule($ruleset, $chain, $cmdstr);
1802     }
1803 }
1804
1805 sub ruleset_generate_rule_insert {
1806     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1807
1808     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1809
1810     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1811         ruleset_insertrule($ruleset, $chain, $cmdstr);
1812     }
1813 }
1814
1815 sub ruleset_create_chain {
1816     my ($ruleset, $chain) = @_;
1817
1818     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1819     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1820
1821     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1822
1823     $ruleset->{$chain} = [];
1824 }
1825
1826 sub ruleset_chain_exist {
1827     my ($ruleset, $chain) = @_;
1828
1829     return $ruleset->{$chain} ? 1 : undef;
1830 }
1831
1832 sub ruleset_addrule {
1833    my ($ruleset, $chain, $rule) = @_;
1834
1835    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1836
1837    push @{$ruleset->{$chain}}, "-A $chain $rule";
1838 }
1839
1840 sub ruleset_insertrule {
1841    my ($ruleset, $chain, $rule) = @_;
1842
1843    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1844
1845    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1846 }
1847
1848 sub get_log_rule_base {
1849     my ($chain, $vmid, $msg, $loglevel) = @_;
1850
1851     die "internal error - no log level" if !defined($loglevel);
1852
1853     $vmid = 0 if !defined($vmid);
1854
1855     # Note: we use special format for prefix to pass further
1856     # info to log daemon (VMID, LOGVELEL and CHAIN)
1857
1858     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1859 }
1860
1861 sub ruleset_addlog {
1862     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1863
1864     return if !defined($loglevel);
1865
1866     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1867
1868     $logrule = "$rule $logrule" if defined($rule);
1869
1870     ruleset_addrule($ruleset, $chain, $logrule);
1871 }
1872
1873 sub ruleset_add_chain_policy {
1874     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
1875
1876     if ($policy eq 'ACCEPT') {
1877
1878         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
1879                               { ACCEPT =>  $accept_action});
1880
1881     } elsif ($policy eq 'DROP') {
1882
1883         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1884
1885         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1886
1887         ruleset_addrule($ruleset, $chain, "-j DROP");
1888     } elsif ($policy eq 'REJECT') {
1889         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1890
1891         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1892
1893         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1894     } else {
1895         # should not happen
1896         die "internal error: unknown policy '$policy'";
1897     }
1898 }
1899
1900 sub ruleset_chain_add_ndp {
1901     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
1902     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
1903
1904     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
1905     if ($direction ne 'OUT' || $options->{radv}) {
1906         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
1907     }
1908     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
1909     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
1910 }
1911
1912 sub ruleset_chain_add_conn_filters {
1913     my ($ruleset, $chain, $accept) = @_;
1914
1915     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1916     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1917 }
1918
1919 sub ruleset_chain_add_input_filters {
1920     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
1921
1922     if ($cluster_conf->{ipset}->{blacklist}){
1923         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
1924             ruleset_create_chain($ruleset, "PVEFW-blacklist");
1925             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
1926             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
1927         }
1928         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
1929         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
1930     }
1931
1932     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1933         if ($ipversion == 4) {
1934             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1935         }
1936     }
1937
1938     if ($options->{tcpflags}) {
1939         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1940     }
1941 }
1942
1943 sub ruleset_create_vm_chain {
1944     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
1945
1946     ruleset_create_chain($ruleset, $chain);
1947     my $accept = generate_nfqueue($options);
1948
1949     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1950         if ($ipversion == 4) {
1951             if ($direction eq 'OUT') {
1952                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1953                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1954                                         proto => 'udp', sport => 68, dport => 67 });
1955             } else {
1956                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1957                                       { action => 'ACCEPT',
1958                                         proto => 'udp', sport => 67, dport => 68 });
1959             }
1960         } elsif ($ipversion == 6) {
1961             if ($direction eq 'OUT') {
1962                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1963                                       { action => 'PVEFW-SET-ACCEPT-MARK',
1964                                         proto => 'udp', sport => 546, dport => 547 });
1965             } else {
1966                 ruleset_generate_rule($ruleset, $chain, $ipversion,
1967                                       { action => 'ACCEPT',
1968                                         proto => 'udp', sport => 547, dport => 546 });
1969             }
1970         }
1971
1972     }
1973
1974     if ($direction eq 'OUT') {
1975         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1976             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1977         }
1978         if ($ipversion == 6 && !$options->{radv}) {
1979             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
1980         }
1981         if ($ipfilter_ipset) {
1982             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
1983         }
1984         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1985     }
1986
1987     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
1988     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
1989 }
1990
1991 sub ruleset_add_group_rule {
1992     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
1993
1994     my $group = $rule->{action};
1995     my $group_chain = "GROUP-$group-$direction";
1996     if(!ruleset_chain_exist($ruleset, $group_chain)){
1997         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
1998     }
1999
2000     if ($direction eq 'OUT' && $rule->{iface_out}) {
2001         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2002     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2003         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2004     } else {
2005         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2006     }
2007
2008     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
2009 }
2010
2011 sub ruleset_generate_vm_rules {
2012     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2013
2014     my $lc_direction = lc($direction);
2015
2016     my $in_accept = generate_nfqueue($options);
2017
2018     foreach my $rule (@$rules) {
2019         next if $rule->{iface} && $rule->{iface} ne $netid;
2020         next if !$rule->{enable} || $rule->{errors};
2021         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2022
2023         if ($rule->{type} eq 'group') {
2024             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2025                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2026         } else {
2027             next if $rule->{type} ne $lc_direction;
2028             eval {
2029                 if ($direction eq 'OUT') {
2030                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2031                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2032                                           undef, $cluster_conf, $vmfw_conf);
2033                 } else {
2034                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2035                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2036                                           undef, $cluster_conf, $vmfw_conf);
2037                 }
2038             };
2039             warn $@ if $@;
2040         }
2041     }
2042 }
2043
2044 sub generate_nfqueue {
2045     my ($options) = @_;
2046
2047     if ($options->{ips}) {
2048         my $action = "NFQUEUE";
2049         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2050             if (defined($3) && defined($1)) {
2051                 $action .= " --queue-balance $1:$3";
2052             } elsif (defined($1)) {
2053                 $action .= " --queue-num $1";
2054             }
2055         }
2056         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2057         return $action;
2058     } else {
2059         return "ACCEPT";
2060     }
2061 }
2062
2063 sub ruleset_generate_vm_ipsrules {
2064     my ($ruleset, $options, $direction, $iface) = @_;
2065
2066     if ($options->{ips} && $direction eq 'IN') {
2067         my $nfqueue = generate_nfqueue($options);
2068
2069         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2070             ruleset_create_chain($ruleset, "PVEFW-IPS");
2071         }
2072
2073         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2074     }
2075 }
2076
2077 sub generate_tap_rules_direction {
2078     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2079
2080     my $lc_direction = lc($direction);
2081
2082     my $rules = $vmfw_conf->{rules};
2083
2084     my $options = $vmfw_conf->{options};
2085     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2086
2087     my $tapchain = "$iface-$direction";
2088
2089     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2090     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2091         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2092
2093     # create chain with mac and ip filter
2094     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2095
2096     if ($options->{enable}) {
2097         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2098
2099         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2100
2101         # implement policy
2102         my $policy;
2103
2104         if ($direction eq 'OUT') {
2105             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2106         } else {
2107         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2108         }
2109
2110         my $accept = generate_nfqueue($options);
2111         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2112         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2113     } else {
2114         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2115         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2116     }
2117
2118     # plug the tap chain to bridge chain
2119     if ($direction eq 'IN') {
2120         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2121                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2122     } else {
2123         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2124                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2125     }
2126 }
2127
2128 sub enable_host_firewall {
2129     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2130
2131     my $options = $hostfw_conf->{options};
2132     my $cluster_options = $cluster_conf->{options};
2133     my $rules = $hostfw_conf->{rules};
2134     my $cluster_rules = $cluster_conf->{rules};
2135
2136     # host inbound firewall
2137     my $chain = "PVEFW-HOST-IN";
2138     ruleset_create_chain($ruleset, $chain);
2139
2140     my $loglevel = get_option_log_level($options, "log_level_in");
2141
2142     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2143
2144     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2145     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2146     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2147
2148     # we use RETURN because we need to check also tap rules
2149     my $accept_action = 'RETURN';
2150
2151     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2152
2153     # add host rules first, so that cluster wide rules can be overwritten
2154     foreach my $rule (@$rules, @$cluster_rules) {
2155         next if !$rule->{enable} || $rule->{errors};
2156         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2157
2158         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2159
2160         eval {
2161             if ($rule->{type} eq 'group') {
2162                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2163             } elsif ($rule->{type} eq 'in') {
2164                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2165                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2166                                       undef, $cluster_conf, $hostfw_conf);
2167             }
2168         };
2169         warn $@ if $@;
2170         delete $rule->{iface_in};
2171     }
2172
2173     # allow standard traffic for management ipset (includes cluster network)
2174     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2175     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2176     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2177     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2178     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2179     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2180
2181     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2182     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2183
2184     # corosync
2185     if ($localnet && ($ipversion == $localnet_ver)) {
2186         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2187         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2188         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2189     }
2190
2191     # implement input policy
2192     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2193     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2194
2195     # host outbound firewall
2196     $chain = "PVEFW-HOST-OUT";
2197     ruleset_create_chain($ruleset, $chain);
2198
2199     $loglevel = get_option_log_level($options, "log_level_out");
2200
2201     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2202
2203     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2204
2205     # we use RETURN because we may want to check other thigs later
2206     $accept_action = 'RETURN';
2207     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2208
2209     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2210
2211     # add host rules first, so that cluster wide rules can be overwritten
2212     foreach my $rule (@$rules, @$cluster_rules) {
2213         next if !$rule->{enable} || $rule->{errors};
2214         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2215
2216         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2217         eval {
2218             if ($rule->{type} eq 'group') {
2219                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2220             } elsif ($rule->{type} eq 'out') {
2221                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2222                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2223                                       undef, $cluster_conf, $hostfw_conf);
2224             }
2225         };
2226         warn $@ if $@;
2227         delete $rule->{iface_out};
2228     }
2229
2230     # allow standard traffic on cluster network
2231     if ($localnet && ($ipversion == $localnet_ver)) {
2232         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2233         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2234         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2235         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2236
2237         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2238         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2239         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2240     }
2241
2242     # implement output policy
2243     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2244     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2245
2246     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2247     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2248 }
2249
2250 sub generate_group_rules {
2251     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2252
2253     my $rules = $cluster_conf->{groups}->{$group};
2254
2255     if (!$rules) {
2256         warn "no such security group '$group'\n";
2257         $rules = []; # create empty chain
2258     }
2259
2260     my $chain = "GROUP-${group}-IN";
2261
2262     ruleset_create_chain($ruleset, $chain);
2263     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2264
2265     foreach my $rule (@$rules) {
2266         next if $rule->{type} ne 'in';
2267         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2268         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2269                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2270                               undef, $cluster_conf);
2271     }
2272
2273     $chain = "GROUP-${group}-OUT";
2274
2275     ruleset_create_chain($ruleset, $chain);
2276     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
2277
2278     foreach my $rule (@$rules) {
2279         next if $rule->{type} ne 'out';
2280         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2281         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2282         # check also other tap rules later
2283         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2284                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2285                               undef, $cluster_conf);
2286     }
2287 }
2288
2289 my $MAX_NETS = 32;
2290 my $valid_netdev_names = {};
2291 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2292     $valid_netdev_names->{"net$i"} = 1;
2293 }
2294
2295 sub parse_fw_rule {
2296     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2297
2298     my $orig_line = $line;
2299
2300     my $rule = {};
2301
2302     # we can add single line comments to the end of the rule
2303     if ($line =~ s/#\s*(.*?)\s*$//) {
2304         $rule->{comment} = decode('utf8', $1);
2305     }
2306
2307     # we can disable a rule when prefixed with '|'
2308
2309     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2310
2311     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2312         die "unable to parse rule: $line\n";
2313
2314     $rule->{type} = lc($1);
2315     $rule->{action} = $2;
2316
2317     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2318         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2319             $rule->{macro} = $1;
2320             $rule->{action} = $2;
2321         }
2322     }
2323
2324     while (length($line)) {
2325         if ($line =~ s/^-i (\S+)\s*//) {
2326             $rule->{iface} = $1;
2327             next;
2328         }
2329
2330         last if $rule->{type} eq 'group';
2331
2332         if ($line =~ s/^-p (\S+)\s*//) {
2333             $rule->{proto} = $1;
2334             next;
2335         }
2336
2337         if ($line =~ s/^-dport (\S+)\s*//) {
2338             $rule->{dport} = $1;
2339             next;
2340         }
2341
2342         if ($line =~ s/^-sport (\S+)\s*//) {
2343             $rule->{sport} = $1;
2344             next;
2345         }
2346         if ($line =~ s/^-source (\S+)\s*//) {
2347             $rule->{source} = $1;
2348             next;
2349         }
2350         if ($line =~ s/^-dest (\S+)\s*//) {
2351             $rule->{dest} = $1;
2352             next;
2353         }
2354
2355         last;
2356     }
2357
2358     die "unable to parse rule parameters: $line\n" if length($line);
2359
2360     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2361     if ($verbose && $rule->{errors}) {
2362         warn "$prefix - errors in rule parameters: $orig_line\n";
2363         foreach my $p (keys %{$rule->{errors}}) {
2364             warn "  $p: $rule->{errors}->{$p}\n";
2365         }
2366     }
2367
2368     return $rule;
2369 }
2370
2371 sub parse_vmfw_option {
2372     my ($line) = @_;
2373
2374     my ($opt, $value);
2375
2376     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2377
2378     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2379         $opt = lc($1);
2380         $value = int($2);
2381     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2382         $opt = lc($1);
2383         $value = $2 ? lc($3) : '';
2384     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2385         $opt = lc($1);
2386         $value = uc($3);
2387     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2388         $opt = lc($1);
2389         $value = $2;
2390     } else {
2391         die "can't parse option '$line'\n"
2392     }
2393
2394     return ($opt, $value);
2395 }
2396
2397 sub parse_hostfw_option {
2398     my ($line) = @_;
2399
2400     my ($opt, $value);
2401
2402     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2403
2404     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2405         $opt = lc($1);
2406         $value = int($2);
2407     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2408         $opt = lc($1);
2409         $value = $2 ? lc($3) : '';
2410     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2411         $opt = lc($1);
2412         $value = int($2);
2413     } else {
2414         die "can't parse option '$line'\n"
2415     }
2416
2417     return ($opt, $value);
2418 }
2419
2420 sub parse_clusterfw_option {
2421     my ($line) = @_;
2422
2423     my ($opt, $value);
2424
2425     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2426         $opt = lc($1);
2427         $value = int($2);
2428         if (($value > 1) && ((time() - $value) > 60)) {
2429             $value = 0
2430         }
2431     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2432         $opt = lc($1);
2433         $value = uc($3);
2434     } else {
2435         die "can't parse option '$line'\n"
2436     }
2437
2438     return ($opt, $value);
2439 }
2440
2441 sub resolve_alias {
2442     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2443
2444     my $alias = lc($cidr);
2445     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2446     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2447
2448     die "no such alias '$cidr'\n" if !$e;;
2449
2450     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2451 }
2452
2453 sub parse_ip_or_cidr {
2454     my ($cidr) = @_;
2455
2456     my $ipversion;
2457
2458     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2459         $cidr =~ s|/128$||;
2460         $ipversion = 6;
2461     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2462         $cidr =~ s|/32$||;
2463         $ipversion = 4;
2464     } else {
2465         die "value does not look like a valid IP address or CIDR network\n";
2466     }
2467
2468     return wantarray ? ($cidr, $ipversion) : $cidr;
2469 }
2470
2471 sub parse_alias {
2472     my ($line) = @_;
2473
2474     # we can add single line comments to the end of the line
2475     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2476
2477     if ($line =~ m/^(\S+)\s(\S+)$/) {
2478         my ($name, $cidr) = ($1, $2);
2479         my $ipversion;
2480
2481         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2482
2483         my $data = {
2484             name => $name,
2485             cidr => $cidr,
2486             ipversion => $ipversion,
2487         };
2488         $data->{comment} = $comment  if $comment;
2489         return $data;
2490     }
2491
2492     return undef;
2493 }
2494
2495 sub generic_fw_config_parser {
2496     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2497
2498     my $section;
2499     my $group;
2500
2501     my $res = $empty_conf;
2502
2503     while (defined(my $line = <$fh>)) {
2504         next if $line =~ m/^#/;
2505         next if $line =~ m/^\s*$/;
2506
2507         chomp $line;
2508
2509         my $linenr = $fh->input_line_number();
2510         my $prefix = "$filename (line $linenr)";
2511
2512         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2513             $section = 'options';
2514             next;
2515         }
2516
2517         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2518             $section = 'aliases';
2519             next;
2520         }
2521
2522         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2523             $section = 'groups';
2524             $group = lc($1);
2525             my $comment = $2;
2526             eval {
2527                 die "security group name too long\n" if length($group) > $max_group_name_length;
2528                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2529             };
2530             if (my $err = $@) {
2531                 ($section, $group, $comment) = undef;
2532                 warn "$prefix: $err";
2533                 next;
2534             }
2535
2536             $res->{$section}->{$group} = [];
2537             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2538                 if $comment;
2539             next;
2540         }
2541
2542         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2543             $section = 'rules';
2544             next;
2545         }
2546
2547         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2548             $section = 'ipset';
2549             $group = lc($1);
2550             my $comment = $2;
2551             eval {
2552                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2553                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2554             };
2555             if (my $err = $@) {
2556                 ($section, $group, $comment) = undef;
2557                 warn "$prefix: $err";
2558                 next;
2559             }
2560
2561             $res->{$section}->{$group} = [];
2562             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2563                 if $comment;
2564             next;
2565         }
2566
2567         if (!$section) {
2568             warn "$prefix: skip line - no section\n";
2569             next;
2570         }
2571
2572         if ($section eq 'options') {
2573             eval {
2574                 my ($opt, $value);
2575                 if ($rule_env eq 'cluster') {
2576                     ($opt, $value) = parse_clusterfw_option($line);
2577                 } elsif ($rule_env eq 'host') {
2578                     ($opt, $value) = parse_hostfw_option($line);
2579                 } else {
2580                     ($opt, $value) = parse_vmfw_option($line);
2581                 }
2582                 $res->{options}->{$opt} = $value;
2583             };
2584             warn "$prefix: $@" if $@;
2585         } elsif ($section eq 'aliases') {
2586             eval {
2587                 my $data = parse_alias($line);
2588                 $res->{aliases}->{lc($data->{name})} = $data;
2589             };
2590             warn "$prefix: $@" if $@;
2591         } elsif ($section eq 'rules') {
2592             my $rule;
2593             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2594             if (my $err = $@) {
2595                 warn "$prefix: $err";
2596                 next;
2597             }
2598             push @{$res->{$section}}, $rule;
2599         } elsif ($section eq 'groups') {
2600             my $rule;
2601             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2602             if (my $err = $@) {
2603                 warn "$prefix: $err";
2604                 next;
2605             }
2606             push @{$res->{$section}->{$group}}, $rule;
2607         } elsif ($section eq 'ipset') {
2608             # we can add single line comments to the end of the rule
2609             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2610
2611             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2612             my $nomatch = $1;
2613             my $cidr = $2;
2614             my $errors;
2615
2616             if ($nomatch && !$feature_ipset_nomatch) {
2617                 $errors->{nomatch} = "nomatch not supported by kernel";
2618             }
2619
2620             eval {
2621                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2622                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2623                 } else {
2624                     $cidr = parse_ip_or_cidr($cidr);
2625                 }
2626             };
2627             if (my $err = $@) {
2628                 chomp $err;
2629                 $errors->{cidr} = $err;
2630             }
2631
2632             my $entry = { cidr => $cidr };
2633             $entry->{nomatch} = 1 if $nomatch;
2634             $entry->{comment} = $comment if $comment;
2635             $entry->{errors} =  $errors if $errors;
2636
2637             if ($verbose && $errors) {
2638                 warn "$prefix - errors in ipset '$group': $line\n";
2639                 foreach my $p (keys %{$errors}) {
2640                     warn "  $p: $errors->{$p}\n";
2641                 }
2642             }
2643
2644             push @{$res->{$section}->{$group}}, $entry;
2645         } else {
2646             warn "$prefix: skip line - unknown section\n";
2647             next;
2648         }
2649     }
2650
2651     return $res;
2652 }
2653
2654 sub parse_hostfw_config {
2655     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2656
2657     my $empty_conf = { rules => [], options => {}};
2658
2659     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2660 }
2661
2662 sub parse_vmfw_config {
2663     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2664
2665     my $empty_conf = {
2666         rules => [],
2667         options => {},
2668         aliases => {},
2669         ipset => {} ,
2670         ipset_comments => {},
2671     };
2672
2673     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2674 }
2675
2676 sub parse_clusterfw_config {
2677     my ($filename, $fh, $verbose) = @_;
2678
2679     my $section;
2680     my $group;
2681
2682     my $empty_conf = {
2683         rules => [],
2684         options => {},
2685         aliases => {},
2686         groups => {},
2687         group_comments => {},
2688         ipset => {} ,
2689         ipset_comments => {},
2690     };
2691
2692     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2693 }
2694
2695 sub run_locked {
2696     my ($code, @param) = @_;
2697
2698     my $timeout = 10;
2699
2700     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2701
2702     die $@ if $@;
2703
2704     return $res;
2705 }
2706
2707 sub read_local_vm_config {
2708
2709     my $qemu = {};
2710     my $lxc = {};
2711
2712     my $vmdata = { qemu => $qemu, lxc => $lxc };
2713
2714     my $vmlist = PVE::Cluster::get_vmlist();
2715     return $vmdata if !$vmlist || !$vmlist->{ids};
2716     my $ids = $vmlist->{ids};
2717
2718     foreach my $vmid (keys %$ids) {
2719         next if !$vmid; # skip VE0
2720         my $d = $ids->{$vmid};
2721         next if !$d->{node} || $d->{node} ne $nodename;
2722         next if !$d->{type};
2723         if ($d->{type} eq 'qemu') {
2724             if ($have_qemu_server) {
2725                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2726                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2727                     $qemu->{$vmid} = $conf;
2728                 }
2729             }
2730         } elsif ($d->{type} eq 'lxc') {
2731             if ($have_lxc) {
2732                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2733                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2734                     $lxc->{$vmid} = $conf;
2735                 }
2736             }
2737         }
2738     }
2739
2740     return $vmdata;
2741 };
2742
2743 sub load_vmfw_conf {
2744     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2745
2746     my $vmfw_conf = {};
2747
2748     $dir = $pvefw_conf_dir if !defined($dir);
2749
2750     my $filename = "$dir/$vmid.fw";
2751     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2752         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2753         $vmfw_conf->{vmid} = $vmid;
2754     }
2755
2756     return $vmfw_conf;
2757 }
2758
2759 my $format_rules = sub {
2760     my ($rules, $allow_iface) = @_;
2761
2762     my $raw = '';
2763
2764     foreach my $rule (@$rules) {
2765         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2766             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2767             $raw .= uc($rule->{type});
2768             if ($rule->{macro}) {
2769                 $raw .= " $rule->{macro}($rule->{action})";
2770             } else {
2771                 $raw .= " " . $rule->{action};
2772             }
2773             if ($allow_iface && $rule->{iface}) {
2774                 $raw .= " -i $rule->{iface}";
2775             }
2776
2777             if ($rule->{type} ne  'group')  {
2778                 $raw .= " -source $rule->{source}" if $rule->{source};
2779                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2780                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2781                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2782                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2783             }
2784
2785             $raw .= " # " . encode('utf8', $rule->{comment})
2786                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2787             $raw .= "\n";
2788         } else {
2789             die "unknown rule type '$rule->{type}'";
2790         }
2791     }
2792
2793     return $raw;
2794 };
2795
2796 my $format_options = sub {
2797     my ($options) = @_;
2798
2799     my $raw = '';
2800
2801     $raw .= "[OPTIONS]\n\n";
2802     foreach my $opt (keys %$options) {
2803         $raw .= "$opt: $options->{$opt}\n";
2804     }
2805     $raw .= "\n";
2806
2807     return $raw;
2808 };
2809
2810 my $format_aliases = sub {
2811     my ($aliases) = @_;
2812
2813     my $raw = '';
2814
2815     $raw .= "[ALIASES]\n\n";
2816     foreach my $k (keys %$aliases) {
2817         my $e = $aliases->{$k};
2818         $raw .= "$e->{name} $e->{cidr}";
2819         $raw .= " # " . encode('utf8', $e->{comment})
2820             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2821         $raw .= "\n";
2822     }
2823     $raw .= "\n";
2824
2825     return $raw;
2826 };
2827
2828 my $format_ipsets = sub {
2829     my ($fw_conf) = @_;
2830
2831     my $raw = '';
2832
2833     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2834         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2835             my $utf8comment = encode('utf8', $comment);
2836             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2837         } else {
2838             $raw .= "[IPSET $ipset]\n\n";
2839         }
2840         my $options = $fw_conf->{ipset}->{$ipset};
2841
2842         my $nethash = {};
2843         foreach my $entry (@$options) {
2844             $nethash->{$entry->{cidr}} = $entry;
2845         }
2846
2847         foreach my $cidr (sort keys %$nethash) {
2848             my $entry = $nethash->{$cidr};
2849             my $line = $entry->{nomatch} ? '!' : '';
2850             $line .= $entry->{cidr};
2851             $line .= " # " . encode('utf8', $entry->{comment})
2852                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2853             $raw .= "$line\n";
2854         }
2855
2856         $raw .= "\n";
2857     }
2858
2859     return $raw;
2860 };
2861
2862 sub save_vmfw_conf {
2863     my ($vmid, $vmfw_conf) = @_;
2864
2865     my $raw = '';
2866
2867     my $options = $vmfw_conf->{options};
2868     $raw .= &$format_options($options) if $options && scalar(keys %$options);
2869
2870     my $aliases = $vmfw_conf->{aliases};
2871     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
2872
2873     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
2874
2875     my $rules = $vmfw_conf->{rules} || [];
2876     if ($rules && scalar(@$rules)) {
2877         $raw .= "[RULES]\n\n";
2878         $raw .= &$format_rules($rules, 1);
2879         $raw .= "\n";
2880     }
2881
2882     my $filename = "$pvefw_conf_dir/$vmid.fw";
2883     if ($raw) {
2884         mkdir $pvefw_conf_dir;
2885         PVE::Tools::file_set_contents($filename, $raw);
2886     } else {
2887         unlink $filename;
2888     }
2889 }
2890
2891 sub remove_vmfw_conf {
2892     my ($vmid) = @_;
2893
2894     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
2895
2896     unlink $vmfw_conffile;
2897 }
2898
2899 sub clone_vmfw_conf {
2900     my ($vmid, $newid) = @_;
2901
2902     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
2903     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
2904
2905     if (-f $clonevm_conffile) {
2906         unlink $clonevm_conffile;
2907     }
2908     if (-f $sourcevm_conffile) {
2909         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
2910         PVE::Tools::file_set_contents($clonevm_conffile, $data);
2911     }
2912 }
2913
2914 sub read_vm_firewall_configs {
2915     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
2916
2917     my $vmfw_configs = {};
2918
2919     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2920         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
2921         next if !$vmfw_conf->{options}; # skip if file does not exists
2922         $vmfw_configs->{$vmid} = $vmfw_conf;
2923     }
2924     foreach my $vmid (keys %{$vmdata->{lxc}}) {
2925         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
2926         next if !$vmfw_conf->{options}; # skip if file does not exists
2927         $vmfw_configs->{$vmid} = $vmfw_conf;
2928     }
2929
2930     return $vmfw_configs;
2931 }
2932
2933 sub get_option_log_level {
2934     my ($options, $k) = @_;
2935
2936     my $v = $options->{$k};
2937     $v = $default_log_level if !defined($v);
2938
2939     return undef if $v eq '' || $v eq 'nolog';
2940
2941     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2942
2943     return $v if ($v >= 0) && ($v <= 7);
2944
2945     warn "unknown log level ($k = '$v')\n";
2946
2947     return undef;
2948 }
2949
2950 sub generate_std_chains {
2951     my ($ruleset, $options, $ipversion) = @_;
2952
2953     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
2954
2955     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2956
2957     my $chain;
2958
2959     if ($ipversion == 4) {
2960         # same as shorewall smurflog.
2961         $chain = 'PVEFW-smurflog';
2962         $std_chains->{$chain} = [];
2963
2964         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2965         push @{$std_chains->{$chain}}, "-j DROP";
2966     }
2967
2968     # same as shorewall logflags action.
2969     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2970     $chain = 'PVEFW-logflags';
2971     $std_chains->{$chain} = [];
2972
2973     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2974     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2975     push @{$std_chains->{$chain}}, "-j DROP";
2976
2977     foreach my $chain (keys %$std_chains) {
2978         ruleset_create_chain($ruleset, $chain);
2979         foreach my $rule (@{$std_chains->{$chain}}) {
2980             if (ref($rule)) {
2981                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2982             } else {
2983                 ruleset_addrule($ruleset, $chain, $rule);
2984             }
2985         }
2986     }
2987 }
2988
2989 sub generate_ipset_chains {
2990     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
2991
2992     foreach my $ipset (keys %{$ipsets}) {
2993
2994         my $options = $ipsets->{$ipset};
2995
2996         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
2997             if (my $ips = $device_ips->{$1}) {
2998                 $options = [@$options, @$ips];
2999             }
3000         }
3001
3002         # remove duplicates
3003         my $nethash = {};
3004         foreach my $entry (@$options) {
3005             next if $entry->{errors}; # skip entries with errors
3006             eval {
3007                 my ($cidr, $ver);
3008                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3009                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3010                 } else {
3011                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3012                 }
3013                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3014                 if ($ver == 6) {
3015                     # ip_compress_address takes an address only, no CIDR
3016                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3017                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3018                     $cidr .= $prefix_len if defined($prefix_len);
3019                     $cidr =~ s|/128$||;
3020                 } else {
3021                     $cidr =~ s|/32$||;
3022                 }
3023
3024                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3025             };
3026             warn $@ if $@;
3027         }
3028
3029         foreach my $ipversion (4, 6) {
3030             my $data = $nethash->{$ipversion};
3031
3032             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3033
3034             my $hashsize = scalar(@$options);
3035             if ($hashsize <= 64) {
3036                 $hashsize = 64;
3037             } else {
3038                 $hashsize = round_powerof2($hashsize);
3039             }
3040
3041             my $family = $ipversion == "6" ? "inet6" : "inet";
3042
3043             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3044
3045             foreach my $cidr (sort keys %$data) {
3046                 my $entry = $data->{$cidr};
3047
3048                 my $cmd = "add $name $cidr";
3049                 if ($entry->{nomatch}) {
3050                     if ($feature_ipset_nomatch) {
3051                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3052                     } else {
3053                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3054                     }
3055                 } else {
3056                     push @{$ipset_ruleset->{$name}}, $cmd;
3057                 }
3058             }
3059         }
3060     }
3061 }
3062
3063 sub round_powerof2 {
3064     my ($int) = @_;
3065
3066     $int--;
3067     $int |= $int >> $_ foreach (1,2,4,8,16);
3068     return ++$int;
3069 }
3070
3071 sub load_clusterfw_conf {
3072     my ($filename, $verbose) = @_;
3073
3074     $filename = $clusterfw_conf_filename if !defined($filename);
3075
3076     my $cluster_conf = {};
3077     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3078         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3079     }
3080
3081     return $cluster_conf;
3082 }
3083
3084 sub save_clusterfw_conf {
3085     my ($cluster_conf) = @_;
3086
3087     my $raw = '';
3088
3089     my $options = $cluster_conf->{options};
3090     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3091
3092     my $aliases = $cluster_conf->{aliases};
3093     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3094
3095     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3096
3097     my $rules = $cluster_conf->{rules};
3098     if ($rules && scalar(@$rules)) {
3099         $raw .= "[RULES]\n\n";
3100         $raw .= &$format_rules($rules, 1);
3101         $raw .= "\n";
3102     }
3103
3104     if ($cluster_conf->{groups}) {
3105         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3106             my $rules = $cluster_conf->{groups}->{$group};
3107             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3108                 my $utf8comment = encode('utf8', $comment);
3109                 $raw .= "[group $group] # $utf8comment\n\n";
3110             } else {
3111                 $raw .= "[group $group]\n\n";
3112             }
3113
3114             $raw .= &$format_rules($rules, 0);
3115             $raw .= "\n";
3116         }
3117     }
3118
3119     if ($raw) {
3120         mkdir $pvefw_conf_dir;
3121         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3122     } else {
3123         unlink $clusterfw_conf_filename;
3124     }
3125 }
3126
3127 sub load_hostfw_conf {
3128     my ($cluster_conf, $filename, $verbose) = @_;
3129
3130     $filename = $hostfw_conf_filename if !defined($filename);
3131
3132     my $hostfw_conf = {};
3133     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3134         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3135     }
3136     return $hostfw_conf;
3137 }
3138
3139 sub save_hostfw_conf {
3140     my ($hostfw_conf) = @_;
3141
3142     my $raw = '';
3143
3144     my $options = $hostfw_conf->{options};
3145     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3146
3147     my $rules = $hostfw_conf->{rules};
3148     if ($rules && scalar(@$rules)) {
3149         $raw .= "[RULES]\n\n";
3150         $raw .= &$format_rules($rules, 1);
3151         $raw .= "\n";
3152     }
3153
3154     if ($raw) {
3155         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3156     } else {
3157         unlink $hostfw_conf_filename;
3158     }
3159 }
3160
3161 sub compile {
3162     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3163
3164     my $vmfw_configs;
3165
3166     if ($vmdata) { # test mode
3167         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3168         my $filename = "$testdir/cluster.fw";
3169         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3170
3171         $filename = "$testdir/host.fw";
3172         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3173
3174         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3175     } else { # normal operation
3176         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3177
3178         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3179
3180         $vmdata = read_local_vm_config();
3181         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3182     }
3183
3184     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3185
3186     my $localnet;
3187     if ($cluster_conf->{aliases}->{local_network}) {
3188         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3189     } else {
3190         my $localnet_ver;
3191         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3192
3193         $cluster_conf->{aliases}->{local_network} = {
3194             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3195     }
3196
3197     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3198
3199     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3200     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3201     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3202
3203     return ($ruleset, $ipset_ruleset, $rulesetv6);
3204 }
3205
3206 sub compile_iptables_filter {
3207     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3208
3209     my $ruleset = {};
3210
3211     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3212     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3213
3214     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3215
3216     my $hostfw_options = $hostfw_conf->{options} || {};
3217
3218     # fixme: what log level should we use here?
3219     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3220
3221     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3222
3223     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3224     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3225
3226     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3227
3228     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3229     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3230
3231     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3232
3233     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3234
3235     if ($hostfw_enable) {
3236         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3237         warn $@ if $@; # just to be sure - should not happen
3238     }
3239
3240     # generate firewall rules for QEMU VMs
3241     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3242         eval {
3243             my $conf = $vmdata->{qemu}->{$vmid};
3244             my $vmfw_conf = $vmfw_configs->{$vmid};
3245             return if !$vmfw_conf;
3246
3247             foreach my $netid (keys %$conf) {
3248                 next if $netid !~ m/^net(\d+)$/;
3249                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3250                 next if !$net->{firewall};
3251                 my $iface = "tap${vmid}i$1";
3252
3253                 my $macaddr = $net->{macaddr};
3254                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3255                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3256                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3257                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3258             }
3259         };
3260         warn $@ if $@; # just to be sure - should not happen
3261     }
3262
3263     # generate firewall rules for LXC containers
3264     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3265         eval {
3266             my $conf = $vmdata->{lxc}->{$vmid};
3267             my $vmfw_conf = $vmfw_configs->{$vmid};
3268             return if !$vmfw_conf;
3269
3270             if ($vmfw_conf->{options}->{enable}) {
3271                 foreach my $netid (keys %$conf) {
3272                     next if $netid !~ m/^net(\d+)$/;
3273                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3274                     next if !$net->{firewall};
3275                     my $iface = "veth${vmid}i$1";
3276                     my $macaddr = $net->{hwaddr};
3277                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3278                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3279                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3280                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3281                 }
3282             }
3283         };
3284         warn $@ if $@; # just to be sure - should not happen
3285     }
3286
3287     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3288         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3289     }
3290
3291     return $ruleset;
3292 }
3293
3294 sub mac_to_linklocal {
3295     my ($macaddr) = @_;
3296     my @parts = split(/:/, $macaddr);
3297     # The standard link local address uses the fe80::/64 prefix with the
3298     # modified EUI-64 identifier derived from the MAC address by flipping the
3299     # universal/local bit and inserting FF:FE in the middle.
3300     # See RFC 4291.
3301     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3302     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3303     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3304 }
3305
3306 sub compile_ipsets {
3307     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3308
3309     my $localnet;
3310     if ($cluster_conf->{aliases}->{local_network}) {
3311         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3312     } else {
3313         my $localnet_ver;
3314         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3315
3316         $cluster_conf->{aliases}->{local_network} = {
3317             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3318     }
3319
3320     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3321
3322
3323     my $ipset_ruleset = {};
3324
3325     # generate ipsets for QEMU VMs
3326     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3327         eval {
3328             my $conf = $vmdata->{qemu}->{$vmid};
3329             my $vmfw_conf = $vmfw_configs->{$vmid};
3330             return if !$vmfw_conf;
3331
3332             # When the 'ipfilter' option is enabled every device for which there
3333             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3334             # ipset.
3335             # The reason is that ipfilter ipsets are always filled with standard
3336             # IPv6 link-local filters.
3337             my $ipsets = $vmfw_conf->{ipset};
3338             my $implicit_sets = {};
3339
3340             my $device_ips = {};
3341             foreach my $netid (keys %$conf) {
3342                 next if $netid !~ m/^net(\d+)$/;
3343                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3344                 next if !$net->{firewall};
3345
3346                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3347                     $implicit_sets->{"ipfilter-$netid"} = [];
3348                 }
3349
3350                 my $macaddr = $net->{macaddr};
3351                 my $linklocal = mac_to_linklocal($macaddr);
3352                 $device_ips->{$netid} = [
3353                     { cidr => $linklocal },
3354                     { cidr => 'fe80::/10', nomatch => 1 }
3355                 ];
3356             }
3357
3358             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3359             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3360         };
3361         warn $@ if $@; # just to be sure - should not happen
3362     }
3363
3364     # generate firewall rules for LXC containers
3365     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3366         eval {
3367             my $conf = $vmdata->{lxc}->{$vmid};
3368             my $vmfw_conf = $vmfw_configs->{$vmid};
3369             return if !$vmfw_conf;
3370
3371             # When the 'ipfilter' option is enabled every device for which there
3372             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3373             # ipset.
3374             # The reason is that ipfilter ipsets are always filled with standard
3375             # IPv6 link-local filters, as well as the IP addresses configured
3376             # for the container.
3377             my $ipsets = $vmfw_conf->{ipset};
3378             my $implicit_sets = {};
3379
3380             my $device_ips = {};
3381             foreach my $netid (keys %$conf) {
3382                 next if $netid !~ m/^net(\d+)$/;
3383                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3384                 next if !$net->{firewall};
3385
3386                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3387                     $implicit_sets->{"ipfilter-$netid"} = [];
3388                 }
3389
3390                 my $macaddr = $net->{hwaddr};
3391                 my $linklocal = mac_to_linklocal($macaddr);
3392                 my $set = $device_ips->{$netid} = [
3393                     { cidr => $linklocal },
3394                     { cidr => 'fe80::/10', nomatch => 1 }
3395                 ];
3396                 if ($net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3397                     push @$set, { cidr => $1 };
3398                 }
3399                 if ($net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3400                     push @$set, { cidr => $1 };
3401                 }
3402             }
3403
3404             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3405             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3406         };
3407         warn $@ if $@; # just to be sure - should not happen
3408     }
3409
3410     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3411
3412     return $ipset_ruleset;
3413 }
3414
3415 sub get_ruleset_status {
3416     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3417
3418     my $statushash = {};
3419
3420     foreach my $chain (sort keys %$ruleset) {
3421         my $sig = &$digest_fn($ruleset->{$chain});
3422
3423         $statushash->{$chain}->{sig} = $sig;
3424
3425         my $oldsig = $active_chains->{$chain};
3426         if (!defined($oldsig)) {
3427             $statushash->{$chain}->{action} = 'create';
3428         } else {
3429             if ($oldsig eq $sig) {
3430                 $statushash->{$chain}->{action} = 'exists';
3431             } else {
3432                 $statushash->{$chain}->{action} = 'update';
3433             }
3434         }
3435         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3436         foreach my $cmd (@{$ruleset->{$chain}}) {
3437             print "\t$cmd\n" if $verbose;
3438         }
3439     }
3440
3441     foreach my $chain (sort keys %$active_chains) {
3442         if (!defined($ruleset->{$chain})) {
3443             my $sig = $active_chains->{$chain};
3444             $statushash->{$chain}->{action} = 'delete';
3445             $statushash->{$chain}->{sig} = $sig;
3446             print "delete $chain ($sig)\n" if $verbose;
3447         }
3448     }
3449
3450     return $statushash;
3451 }
3452
3453 sub print_sig_rule {
3454     my ($chain, $sig) = @_;
3455
3456     # We just use this to store a SHA1 checksum used to detect changes
3457     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3458 }
3459
3460 sub get_ruleset_cmdlist {
3461     my ($ruleset, $verbose, $iptablescmd) = @_;
3462
3463     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3464
3465     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3466     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3467
3468     # create missing chains first
3469     foreach my $chain (sort keys %$ruleset) {
3470         my $stat = $statushash->{$chain};
3471         die "internal error" if !$stat;
3472         next if $stat->{action} ne 'create';
3473
3474         $cmdlist .= ":$chain - [0:0]\n";
3475     }
3476
3477     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3478         my $chain = "PVEFW-$h";
3479         if ($ruleset->{$chain} && !$hooks->{$h}) {
3480             $cmdlist .= "-A $h -j $chain\n";
3481         }
3482     }
3483
3484     foreach my $chain (sort keys %$ruleset) {
3485         my $stat = $statushash->{$chain};
3486         die "internal error" if !$stat;
3487
3488         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3489             $cmdlist .= "-F $chain\n";
3490             foreach my $cmd (@{$ruleset->{$chain}}) {
3491                 $cmdlist .= "$cmd\n";
3492             }
3493             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3494         } elsif ($stat->{action} eq 'delete') {
3495             die "internal error"; # this should not happen
3496         } elsif ($stat->{action} eq 'exists') {
3497             # do nothing
3498         } else {
3499             die "internal error - unknown status '$stat->{action}'";
3500         }
3501     }
3502
3503     foreach my $chain (keys %$statushash) {
3504         next if $statushash->{$chain}->{action} ne 'delete';
3505         $cmdlist .= "-F $chain\n";
3506     }
3507     foreach my $chain (keys %$statushash) {
3508         next if $statushash->{$chain}->{action} ne 'delete';
3509         next if $chain eq 'PVEFW-INPUT';
3510         next if $chain eq 'PVEFW-OUTPUT';
3511         next if $chain eq 'PVEFW-FORWARD';
3512         $cmdlist .= "-X $chain\n";
3513     }
3514
3515     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3516
3517     $cmdlist .= "COMMIT\n";
3518
3519     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3520 }
3521
3522 sub get_ipset_cmdlist {
3523     my ($ruleset, $verbose) = @_;
3524
3525     my $cmdlist = "";
3526
3527     my $delete_cmdlist = "";
3528
3529     my $active_chains = ipset_get_chains();
3530     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3531
3532     # remove stale _swap chains
3533     foreach my $chain (keys %$active_chains) {
3534         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3535             $cmdlist .= "destroy $chain\n";
3536         }
3537     }
3538
3539     foreach my $chain (keys %$ruleset) {
3540         my $stat = $statushash->{$chain};
3541         die "internal error" if !$stat;
3542
3543         if ($stat->{action} eq 'create') {
3544             foreach my $cmd (@{$ruleset->{$chain}}) {
3545                 $cmdlist .= "$cmd\n";
3546             }
3547         }
3548     }
3549
3550     foreach my $chain (keys %$ruleset) {
3551         my $stat = $statushash->{$chain};
3552         die "internal error" if !$stat;
3553
3554         if ($stat->{action} eq 'update') {
3555             my $chain_swap = $chain."_swap";
3556
3557             foreach my $cmd (@{$ruleset->{$chain}}) {
3558                 $cmd =~ s/$chain/$chain_swap/;
3559                 $cmdlist .= "$cmd\n";
3560             }
3561             $cmdlist .= "swap $chain_swap $chain\n";
3562             $cmdlist .= "flush $chain_swap\n";
3563             $cmdlist .= "destroy $chain_swap\n";
3564         }
3565     }
3566
3567      # the remove unused chains
3568     foreach my $chain (keys %$statushash) {
3569         next if $statushash->{$chain}->{action} ne 'delete';
3570
3571         $delete_cmdlist .= "flush $chain\n";
3572         $delete_cmdlist .= "destroy $chain\n";
3573     }
3574
3575     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3576
3577     return ($cmdlist, $delete_cmdlist, $changes);
3578 }
3579
3580 sub apply_ruleset {
3581     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3582
3583     enable_bridge_firewall();
3584
3585     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3586         get_ipset_cmdlist($ipset_ruleset, $verbose);
3587
3588     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3589     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3590
3591     if ($verbose) {
3592         if ($ipset_changes) {
3593             print "ipset changes:\n";
3594             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3595             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3596         }
3597
3598         if ($changes) {
3599             print "iptables changes:\n";
3600             print $cmdlist;
3601         }
3602
3603         if ($changesv6) {
3604             print "ip6tables changes:\n";
3605             print $cmdlistv6;
3606         }
3607     }
3608
3609     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3610     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3611
3612     ipset_restore_cmdlist($ipset_create_cmdlist);
3613
3614     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3615     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3616
3617     iptables_restore_cmdlist($cmdlist);
3618
3619     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3620     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3621
3622     ip6tables_restore_cmdlist($cmdlistv6);
3623
3624     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3625     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3626
3627     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3628
3629     # test: re-read status and check if everything is up to date
3630     my $active_chains = iptables_get_chains();
3631     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3632
3633     my $errors;
3634     foreach my $chain (sort keys %$ruleset) {
3635         my $stat = $statushash->{$chain};
3636         if ($stat->{action} ne 'exists') {
3637             warn "unable to update chain '$chain'\n";
3638             $errors = 1;
3639         }
3640     }
3641
3642     my $active_chainsv6 = iptables_get_chains("ip6tables");
3643     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3644
3645     foreach my $chain (sort keys %$rulesetv6) {
3646         my $stat = $statushashv6->{$chain};
3647         if ($stat->{action} ne 'exists') {
3648             warn "unable to update chain '$chain'\n";
3649             $errors = 1;
3650         }
3651     }
3652
3653     die "unable to apply firewall changes\n" if $errors;
3654
3655     update_nf_conntrack_max($hostfw_conf);
3656
3657     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3658
3659 }
3660
3661 sub update_nf_conntrack_max {
3662     my ($hostfw_conf) = @_;
3663
3664     my $max = 65536; # reasonable default
3665
3666     my $options = $hostfw_conf->{options} || {};
3667
3668     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3669         $max = $options->{nf_conntrack_max};
3670         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3671     }
3672
3673     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3674     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3675
3676     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3677
3678     if ($current != $max) {
3679         my $hashsize = int($max/4);
3680         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3681         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3682     }
3683 }
3684
3685 sub update_nf_conntrack_tcp_timeout_established {
3686     my ($hostfw_conf) = @_;
3687
3688     my $options = $hostfw_conf->{options} || {};
3689
3690     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3691
3692     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3693 }
3694
3695 sub remove_pvefw_chains {
3696
3697     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3698     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3699     PVE::Firewall::remove_pvefw_chains_ipset();
3700
3701 }
3702
3703 sub remove_pvefw_chains_iptables {
3704     my ($iptablescmd) = @_;
3705
3706     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3707     my $cmdlist = "*filter\n";
3708
3709     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3710         if ($hooks->{$h}) {
3711             $cmdlist .= "-D $h -j PVEFW-$h\n";
3712         }
3713     }
3714
3715     foreach my $chain (keys %$chash) {
3716         $cmdlist .= "-F $chain\n";
3717     }
3718
3719     foreach my $chain (keys %$chash) {
3720         $cmdlist .= "-X $chain\n";
3721     }
3722     $cmdlist .= "COMMIT\n";
3723
3724     if($iptablescmd eq "ip6tables") {
3725         ip6tables_restore_cmdlist($cmdlist);
3726     } else {
3727         iptables_restore_cmdlist($cmdlist);
3728     }
3729 }
3730
3731 sub remove_pvefw_chains_ipset {
3732
3733     my $ipset_chains = ipset_get_chains();
3734
3735     my $cmdlist = "";
3736
3737     foreach my $chain (keys %$ipset_chains) {
3738         $cmdlist .= "flush $chain\n";
3739         $cmdlist .= "destroy $chain\n";
3740     }
3741
3742     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3743 }
3744
3745 sub init {
3746     my $cluster_conf = load_clusterfw_conf();
3747     my $cluster_options = $cluster_conf->{options};
3748     my $enable = $cluster_options->{enable};
3749
3750     return if !$enable;
3751
3752     # load required modules here
3753 }
3754
3755 sub update {
3756     my $code = sub {
3757
3758         my $cluster_conf = load_clusterfw_conf();
3759         my $cluster_options = $cluster_conf->{options};
3760
3761         if (!$cluster_options->{enable}) {
3762             PVE::Firewall::remove_pvefw_chains();
3763             return;
3764         }
3765
3766         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3767
3768         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3769
3770         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3771     };
3772
3773     run_locked($code);
3774 }
3775
3776 1;