src/PVE/Firewall.pm

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