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 PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'info';
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic (bidirectional)",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 163     ],
 164     'DNS' => [
 165         "Domain Name System traffic (upd and tcp)",
 166         { action => 'PARAM', proto => 'udp', dport => '53' },
 167         { action => 'PARAM', proto => 'tcp', dport => '53' },
 168     ],
 169     'Distcc' => [
 170         "Distributed Compiler service",
 171         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 172     ],
 173     'FTP' => [
 174         "File Transfer Protocol",
 175         { action => 'PARAM', proto => 'tcp', dport => '21' },
 176     ],
 177     'Finger' => [
 178         "Finger protocol (RFC 742)",
 179         { action => 'PARAM', proto => 'tcp', dport => '79' },
 180     ],
 181     'GNUnet' => [
 182         "GNUnet secure peer-to-peer networking traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 184         { action => 'PARAM', proto => 'udp', dport => '2086' },
 185         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 186         { action => 'PARAM', proto => 'udp', dport => '1080' },
 187     ],
 188     'GRE' => [
 189         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 190         { action => 'PARAM', proto => '47' },
 191         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 192     ],
 193     'Git' => [
 194         "Git distributed revision control traffic",
 195         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 196     ],
 197     'HKP' => [
 198         "OpenPGP HTTP keyserver protocol traffic",
 199         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 200     ],
 201     'HTTP' => [
 202         "Hypertext Transfer Protocol (WWW)",
 203         { action => 'PARAM', proto => 'tcp', dport => '80' },
 204     ],
 205     'HTTPS' => [
 206         "Hypertext Transfer Protocol (WWW) over SSL",
 207         { action => 'PARAM', proto => 'tcp', dport => '443' },
 208     ],
 209     'ICPV2' => [
 210         "Internet Cache Protocol V2 (Squid) traffic",
 211         { action => 'PARAM', proto => 'udp', dport => '3130' },
 212     ],
 213     'ICQ' => [
 214         "AOL Instant Messenger traffic",
 215         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 216     ],
 217     'IMAP' => [
 218         "Internet Message Access Protocol",
 219         { action => 'PARAM', proto => 'tcp', dport => '143' },
 220     ],
 221     'IMAPS' => [
 222         "Internet Message Access Protocol over SSL",
 223         { action => 'PARAM', proto => 'tcp', dport => '993' },
 224     ],
 225     'IPIP' => [
 226         "IPIP capsulation traffic (bidirectional)",
 227         { action => 'PARAM', proto => '94' },
 228         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 229     ],
 230     'IPsec' => [
 231         "IPsec traffic (bidirectional)",
 232         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 233         { action => 'PARAM', proto => '50' },
 234         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 236     ],
 237     'IPsecah' => [
 238         "IPsec authentication (AH) traffic (bidirectional)",
 239         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 240         { action => 'PARAM', proto => '51' },
 241         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 243     ],
 244     'IPsecnat' => [
 245         "IPsec traffic and Nat-Traversal (bidirectional)",
 246         { action => 'PARAM', proto => 'udp', dport => '500' },
 247         { action => 'PARAM', proto => 'udp', dport => '4500' },
 248         { action => 'PARAM', proto => '50' },
 249         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 250         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 251         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 252     ],
 253     'IRC' => [
 254         "Internet Relay Chat traffic",
 255         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 256     ],
 257     'Jetdirect' => [
 258         "HP Jetdirect printing",
 259         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 260     ],
 261     'L2TP' => [
 262         "Layer 2 Tunneling Protocol traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '1701' },
 264         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 265     ],
 266     'LDAP' => [
 267         "Lightweight Directory Access Protocol traffic",
 268         { action => 'PARAM', proto => 'tcp', dport => '389' },
 269     ],
 270     'LDAPS' => [
 271         "Secure Lightweight Directory Access Protocol traffic",
 272         { action => 'PARAM', proto => 'tcp', dport => '636' },
 273     ],
 274     'MSNP' => [
 275         "Microsoft Notification Protocol",
 276         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 277     ],
 278     'MSSQL' => [
 279         "Microsoft SQL Server",
 280         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 281     ],
 282     'Mail' => [
 283         "Mail traffic (SMTP, SMTPS, Submission)",
 284         { action => 'PARAM', proto => 'tcp', dport => '25' },
 285         { action => 'PARAM', proto => 'tcp', dport => '465' },
 286         { action => 'PARAM', proto => 'tcp', dport => '587' },
 287     ],
 288     'Munin' => [
 289         "Munin networked resource monitoring traffic",
 290         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 291     ],
 292     'MySQL' => [
 293         "MySQL server",
 294         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 295     ],
 296     'NNTP' => [
 297         "NNTP traffic (Usenet).",
 298         { action => 'PARAM', proto => 'tcp', dport => '119' },
 299     ],
 300     'NNTPS' => [
 301         "Encrypted NNTP traffic (Usenet)",
 302         { action => 'PARAM', proto => 'tcp', dport => '563' },
 303     ],
 304     'NTP' => [
 305         "Network Time Protocol (ntpd)",
 306         { action => 'PARAM', proto => 'udp', dport => '123' },
 307     ],
 308     'NTPbi' => [
 309         "Bi-directional NTP (for NTP peers)",
 310         { action => 'PARAM', proto => 'udp', dport => '123' },
 311         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 312     ],
 313     'OSPF' => [
 314         "OSPF multicast traffic",
 315         { action => 'PARAM', proto => '89' },
 316     ],
 317     'OpenVPN' => [
 318         "OpenVPN traffic",
 319         { action => 'PARAM', proto => 'udp', dport => '1194' },
 320     ],
 321     'PCA' => [
 322         "Symantec PCAnywere (tm)",
 323         { action => 'PARAM', proto => 'udp', dport => '5632' },
 324         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 325     ],
 326     'POP3' => [
 327         "POP3 traffic",
 328         { action => 'PARAM', proto => 'tcp', dport => '110' },
 329     ],
 330     'POP3S' => [
 331         "Encrypted POP3 traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '995' },
 333     ],
 334     'PPtP' => [
 335         "Point-to-Point Tunneling Protocol",
 336         { action => 'PARAM', proto => '47' },
 337         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 338         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 339     ],
 340     'Ping' => [
 341         "ICMP echo request",
 342         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 343     ],
 344     'PostgreSQL' => [
 345         "PostgreSQL server",
 346         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 347     ],
 348     'Printer' => [
 349         "Line Printer protocol printing",
 350         { action => 'PARAM', proto => 'tcp', dport => '515' },
 351     ],
 352     'RDP' => [
 353         "Microsoft Remote Desktop Protocol traffic",
 354         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 355     ],
 356     'RIPbi' => [
 357         "Routing Information Protocol (bidirectional)",
 358         { action => 'PARAM', proto => 'udp', dport => '520' },
 359         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 360     ],
 361     'RNDC' => [
 362         "BIND remote management protocol",
 363         { action => 'PARAM', proto => 'tcp', dport => '953' },
 364     ],
 365     'Razor' => [
 366         "Razor Antispam System",
 367         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 368     ],
 369     'Rdate' => [
 370         "Remote time retrieval (rdate)",
 371         { action => 'PARAM', proto => 'tcp', dport => '37' },
 372     ],
 373     'Rsync' => [
 374         "Rsync server",
 375         { action => 'PARAM', proto => 'tcp', dport => '873' },
 376     ],
 377     'SANE' => [
 378         "SANE network scanning",
 379         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 380     ],
 381     'SMB' => [
 382         "Microsoft SMB traffic",
 383         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 384         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 385         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 386         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 387     ],
 388     'SMBBI' => [
 389         "Microsoft SMB traffic (bidirectional)",
 390         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 391         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 392         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 393         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 394         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 395         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 396         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 397         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 398     ],
 399     'SMBswat' => [
 400         "Samba Web Administration Tool",
 401         { action => 'PARAM', proto => 'tcp', dport => '901' },
 402     ],
 403     'SMTP' => [
 404         "Simple Mail Transfer Protocol",
 405         { action => 'PARAM', proto => 'tcp', dport => '25' },
 406     ],
 407     'SMTPS' => [
 408         "Encrypted Simple Mail Transfer Protocol",
 409         { action => 'PARAM', proto => 'tcp', dport => '465' },
 410     ],
 411     'SNMP' => [
 412         "Simple Network Management Protocol",
 413         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 414         { action => 'PARAM', proto => 'tcp', dport => '161' },
 415     ],
 416     'SPAMD' => [
 417         "Spam Assassin SPAMD traffic",
 418         { action => 'PARAM', proto => 'tcp', dport => '783' },
 419     ],
 420     'SSH' => [
 421         "Secure shell traffic",
 422         { action => 'PARAM', proto => 'tcp', dport => '22' },
 423     ],
 424     'SVN' => [
 425         "Subversion server (svnserve)",
 426         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 427     ],
 428     'SixXS' => [
 429         "SixXS IPv6 Deployment and Tunnel Broker",
 430         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 431         { action => 'PARAM', proto => 'udp', dport => '3740' },
 432         { action => 'PARAM', proto => '41' },
 433         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 434     ],
 435     'Squid' => [
 436         "Squid web proxy traffic",
 437         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 438     ],
 439     'Submission' => [
 440         "Mail message submission traffic",
 441         { action => 'PARAM', proto => 'tcp', dport => '587' },
 442     ],
 443     'Syslog' => [
 444         "Syslog protocol (RFC 5424) traffic",
 445         { action => 'PARAM', proto => 'udp', dport => '514' },
 446         { action => 'PARAM', proto => 'tcp', dport => '514' },
 447     ],
 448     'TFTP' => [
 449         "Trivial File Transfer Protocol traffic",
 450         { action => 'PARAM', proto => 'udp', dport => '69' },
 451     ],
 452     'Telnet' => [
 453         "Telnet traffic",
 454         { action => 'PARAM', proto => 'tcp', dport => '23' },
 455     ],
 456     'Telnets' => [
 457         "Telnet over SSL",
 458         { action => 'PARAM', proto => 'tcp', dport => '992' },
 459     ],
 460     'Time' => [
 461         "RFC 868 Time protocol",
 462         { action => 'PARAM', proto => 'tcp', dport => '37' },
 463     ],
 464     'Trcrt' => [
 465         "Traceroute (for up to 30 hops) traffic",
 466         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 467         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 468     ],
 469     'VNC' => [
 470         "VNC traffic for VNC display's 0 - 9",
 471         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 472     ],
 473     'VNCL' => [
 474         "VNC traffic from Vncservers to Vncviewers in listen mode",
 475         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 476     ],
 477     'Web' => [
 478         "WWW traffic (HTTP and HTTPS)",
 479         { action => 'PARAM', proto => 'tcp', dport => '80' },
 480         { action => 'PARAM', proto => 'tcp', dport => '443' },
 481     ],
 482     'Webcache' => [
 483         "Web Cache/Proxy traffic (port 8080)",
 484         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 485     ],
 486     'Webmin' => [
 487         "Webmin traffic",
 488         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 489     ],
 490     'Whois' => [
 491         "Whois (nicname, RFC 3912) traffic",
 492         { action => 'PARAM', proto => 'tcp', dport => '43' },
 493     ],
 494 };
 495
 496 my $pve_fw_parsed_macros;
 497 my $pve_fw_macro_descr;
 498 my $pve_fw_preferred_macro_names = {};
 499
 500 my $pve_std_chains = {
 501     'PVEFW-SET-ACCEPT-MARK' => [
 502         "-j MARK --set-mark 1",
 503     ],
 504     'PVEFW-DropBroadcast' => [
 505         # same as shorewall 'Broadcast'
 506         # simply DROP BROADCAST/MULTICAST/ANYCAST
 507         # we can use this to reduce logging
 508         { action => 'DROP', dsttype => 'BROADCAST' },
 509         { action => 'DROP', dsttype => 'MULTICAST' },
 510         { action => 'DROP', dsttype => 'ANYCAST' },
 511         { action => 'DROP', dest => '224.0.0.0/4' },
 512     ],
 513     'PVEFW-reject' => [
 514         # same as shorewall 'reject'
 515         { action => 'DROP', dsttype => 'BROADCAST' },
 516         { action => 'DROP', source => '224.0.0.0/4' },
 517         { action => 'DROP', proto => 'icmp' },
 518         "-p tcp -j REJECT --reject-with tcp-reset",
 519         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 520         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 521         "-j REJECT --reject-with icmp-host-prohibited",
 522     ],
 523     'PVEFW-Drop' => [
 524         # same as shorewall 'Drop', which is equal to DROP,
 525         # but REJECT/DROP some packages to reduce logging,
 526         # and ACCEPT critical ICMP types
 527         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 528         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 529         { action => 'PVEFW-DropBroadcast' },
 530         # ACCEPT critical ICMP types
 531         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 532         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 533         # Drop packets with INVALID state
 534         "-m conntrack --ctstate INVALID -j DROP",
 535         # Drop Microsoft SMB noise
 536         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 537         { action => 'DROP', proto => 'udp', dport => '137:139'},
 538         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 539         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 540         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 541         # Drop new/NotSyn traffic so that it doesn't get logged
 542         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 543         # Drop DNS replies
 544         { action => 'DROP', proto => 'udp', sport => 53 },
 545     ],
 546     'PVEFW-Reject' => [
 547         # same as shorewall 'Reject', which is equal to Reject,
 548         # but REJECT/DROP some packages to reduce logging,
 549         # and ACCEPT critical ICMP types
 550         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 551         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 552         { action => 'PVEFW-DropBroadcast' },
 553         # ACCEPT critical ICMP types
 554         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 556         # Drop packets with INVALID state
 557         "-m conntrack --ctstate INVALID -j DROP",
 558         # Drop Microsoft SMB noise
 559         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 560         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 561         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 562         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 563         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 564         # Drop new/NotSyn traffic so that it doesn't get logged
 565         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 566         # Drop DNS replies
 567         { action => 'DROP', proto => 'udp', sport => 53 },
 568     ],
 569     'PVEFW-tcpflags' => [
 570         # same as shorewall tcpflags action.
 571         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 572         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 573         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 574         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 575         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 576         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 577     ],
 578     'PVEFW-smurfs' => [
 579         # same as shorewall smurfs action
 580         # Filter packets for smurfs (packets with a broadcast address as the source).
 581         "-s 0.0.0.0/32 -j RETURN",
 582         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 583         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 584     ],
 585 };
 586
 587 # iptables -p icmp -h
 588 my $icmp_type_names = {
 589     any => 1,
 590     'echo-reply' => 1,
 591     'destination-unreachable' => 1,
 592     'network-unreachable' => 1,
 593     'host-unreachable' => 1,
 594     'protocol-unreachable' => 1,
 595     'port-unreachable' => 1,
 596     'fragmentation-needed' => 1,
 597     'source-route-failed' => 1,
 598     'network-unknown' => 1,
 599     'host-unknown' => 1,
 600     'network-prohibited' => 1,
 601     'host-prohibited' => 1,
 602     'TOS-network-unreachable' => 1,
 603     'TOS-host-unreachable' => 1,
 604     'communication-prohibited' => 1,
 605     'host-precedence-violation' => 1,
 606     'precedence-cutoff' => 1,
 607     'source-quench' => 1,
 608     'redirect' => 1,
 609     'network-redirect' => 1,
 610     'host-redirect' => 1,
 611     'TOS-network-redirect' => 1,
 612     'TOS-host-redirect' => 1,
 613     'echo-request' => 1,
 614     'router-advertisement' => 1,
 615     'router-solicitation' => 1,
 616     'time-exceeded' => 1,
 617     'ttl-zero-during-transit' => 1,
 618     'ttl-zero-during-reassembly' => 1,
 619     'parameter-problem' => 1,
 620     'ip-header-bad' => 1,
 621     'required-option-missing' => 1,
 622     'timestamp-request' => 1,
 623     'timestamp-reply' => 1,
 624     'address-mask-request' => 1,
 625     'address-mask-reply' => 1,
 626 };
 627
 628 sub init_firewall_macros {
 629
 630     $pve_fw_parsed_macros = {};
 631
 632     foreach my $k (keys %$pve_fw_macros) {
 633         my $lc_name = lc($k);
 634         my $macro = $pve_fw_macros->{$k};
 635         if (!ref($macro->[0])) {
 636             $pve_fw_macro_descr->{$k} = shift @$macro;
 637         }
 638         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 639         $pve_fw_parsed_macros->{$k} = $macro;
 640     }
 641 }
 642
 643 init_firewall_macros();
 644
 645 sub get_macros {
 646     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 647 }
 648
 649 my $etc_services;
 650
 651 sub get_etc_services {
 652
 653     return $etc_services if $etc_services;
 654
 655     my $filename = "/etc/services";
 656
 657     my $fh = IO::File->new($filename, O_RDONLY);
 658     if (!$fh) {
 659         warn "unable to read '$filename' - $!\n";
 660         return {};
 661     }
 662
 663     my $services = {};
 664
 665     while (my $line = <$fh>) {
 666         chomp ($line);
 667         next if $line =~m/^#/;
 668         next if ($line =~m/^\s*$/);
 669
 670         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 671             $services->{byid}->{$2}->{name} = $1;
 672             $services->{byid}->{$2}->{port} = $2;
 673             $services->{byid}->{$2}->{$3} = 1;
 674             $services->{byname}->{$1} = $services->{byid}->{$2};
 675         }
 676     }
 677
 678     close($fh);
 679
 680     $etc_services = $services;
 681
 682
 683     return $etc_services;
 684 }
 685
 686 my $etc_protocols;
 687
 688 sub get_etc_protocols {
 689     return $etc_protocols if $etc_protocols;
 690
 691     my $filename = "/etc/protocols";
 692
 693     my $fh = IO::File->new($filename, O_RDONLY);
 694     if (!$fh) {
 695         warn "unable to read '$filename' - $!\n";
 696         return {};
 697     }
 698
 699     my $protocols = {};
 700
 701     while (my $line = <$fh>) {
 702         chomp ($line);
 703         next if $line =~m/^#/;
 704         next if ($line =~m/^\s*$/);
 705
 706         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 707             $protocols->{byid}->{$2}->{name} = $1;
 708             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 709         }
 710     }
 711
 712     close($fh);
 713
 714     $etc_protocols = $protocols;
 715
 716     return $etc_protocols;
 717 }
 718
 719 sub parse_address_list {
 720     my ($str) = @_;
 721
 722     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 723     return if $str =~ m/^${ip_alias_pattern}$/;
 724
 725     my $count = 0;
 726     my $iprange = 0;
 727     foreach my $elem (split(/,/, $str)) {
 728         $count++;
 729         if (!Net::IP->new($elem)) {
 730             my $err = Net::IP::Error();
 731             die "invalid IP address: $err\n";
 732         }
 733         $iprange = 1 if $elem =~ m/-/;
 734     }
 735
 736     die "you can use a range in a list\n" if $iprange && $count > 1;
 737 }
 738
 739 sub parse_port_name_number_or_range {
 740     my ($str) = @_;
 741
 742     my $services = PVE::Firewall::get_etc_services();
 743     my $count = 0;
 744     my $icmp_port = 0;
 745
 746     foreach my $item (split(/,/, $str)) {
 747         $count++;
 748         if ($item =~ m/^(\d+):(\d+)$/) {
 749             my ($port1, $port2) = ($1, $2);
 750             die "invalid port '$port1'\n" if $port1 > 65535;
 751             die "invalid port '$port2'\n" if $port2 > 65535;
 752         } elsif ($item =~ m/^(\d+)$/) {
 753             my $port = $1;
 754             die "invalid port '$port'\n" if $port > 65535;
 755         } else {
 756             if ($icmp_type_names->{$item}) {
 757                 $icmp_port = 1;
 758             } else {
 759                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 760             }
 761         }
 762     }
 763
 764     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 765
 766     return $count;
 767 }
 768
 769 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 770 sub pve_fw_verify_port_spec {
 771    my ($portstr) = @_;
 772
 773    parse_port_name_number_or_range($portstr);
 774
 775    return $portstr;
 776 }
 777
 778 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 779 sub pve_fw_verify_v4addr_spec {
 780    my ($list) = @_;
 781
 782    parse_address_list($list);
 783
 784    return $list;
 785 }
 786
 787 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 788 sub pve_fw_verify_protocol_spec {
 789    my ($proto) = @_;
 790
 791    my $protocols = get_etc_protocols();
 792
 793    die "unknown protocol '$proto'\n" if $proto &&
 794        !(defined($protocols->{byname}->{$proto}) ||
 795          defined($protocols->{byid}->{$proto}));
 796
 797    return $proto;
 798 }
 799
 800
 801 # helper function for API
 802
 803 sub copy_opject_with_digest {
 804     my ($object) = @_;
 805
 806     my $sha = Digest::SHA->new('sha1');
 807
 808     my $res = {};
 809     foreach my $k (sort keys %$object) {
 810         my $v = $object->{$k};
 811         next if !defined($v);
 812         $res->{$k} = $v;
 813         $sha->add($k, ':', $v, "\n");
 814     }
 815
 816     my $digest = $sha->hexdigest;
 817
 818     $res->{digest} = $digest;
 819
 820     return wantarray ? ($res, $digest) : $res;
 821 }
 822
 823 sub copy_list_with_digest {
 824     my ($list) = @_;
 825
 826     my $sha = Digest::SHA->new('sha1');
 827
 828     my $res = [];
 829     foreach my $entry (@$list) {
 830         my $data = {};
 831         foreach my $k (sort keys %$entry) {
 832             my $v = $entry->{$k};
 833             next if !defined($v);
 834             $data->{$k} = $v;
 835             $sha->add($k, ':', $v, "\n");
 836         }
 837         push @$res, $data;
 838     }
 839
 840     my $digest = $sha->hexdigest;
 841
 842     foreach my $entry (@$res) {
 843         $entry->{digest} = $digest;
 844     }
 845
 846     return wantarray ? ($res, $digest) : $res;
 847 }
 848
 849 my $rule_properties = {
 850     pos => {
 851         description => "Update rule at position <pos>.",
 852         type => 'integer',
 853         minimum => 0,
 854         optional => 1,
 855     },
 856     digest => get_standard_option('pve-config-digest'),
 857     type => {
 858         type => 'string',
 859         optional => 1,
 860         enum => ['in', 'out', 'group'],
 861     },
 862     action => {
 863         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 864         type => 'string',
 865         optional => 1,
 866         pattern => $security_group_name_pattern,
 867         maxLength => 20,
 868         minLength => 2,
 869     },
 870     macro => {
 871         type => 'string',
 872         optional => 1,
 873         maxLength => 128,
 874     },
 875     iface => get_standard_option('pve-iface', { optional => 1 }),
 876     source => {
 877         type => 'string', format => 'pve-fw-v4addr-spec',
 878         optional => 1,
 879     },
 880     dest => {
 881         type => 'string', format => 'pve-fw-v4addr-spec',
 882         optional => 1,
 883     },
 884     proto => {
 885         type => 'string', format => 'pve-fw-protocol-spec',
 886         optional => 1,
 887     },
 888     enable => {
 889         type => 'boolean',
 890         optional => 1,
 891     },
 892     sport => {
 893         type => 'string', format => 'pve-fw-port-spec',
 894         optional => 1,
 895     },
 896     dport => {
 897         type => 'string', format => 'pve-fw-port-spec',
 898         optional => 1,
 899     },
 900     comment => {
 901         type => 'string',
 902         optional => 1,
 903     },
 904 };
 905
 906 sub add_rule_properties {
 907     my ($properties) = @_;
 908
 909     foreach my $k (keys %$rule_properties) {
 910         my $h = $rule_properties->{$k};
 911         # copy data, so that we can modify later without side effects
 912         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 913     }
 914
 915     return $properties;
 916 }
 917
 918 sub delete_rule_properties {
 919     my ($rule, $delete_str) = @_;
 920
 921     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 922         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 923             if !defined($rule_properties->{$opt});
 924         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 925             if $opt eq 'type' || $opt eq 'action';
 926         delete $rule->{$opt};
 927     }
 928
 929     return $rule;
 930 }
 931
 932 my $apply_macro = sub {
 933     my ($macro_name, $param, $verify) = @_;
 934
 935     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 936     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 937
 938     my $rules = [];
 939
 940     foreach my $templ (@$macro_rules) {
 941         my $rule = {};
 942         my $param_used = {};
 943         foreach my $k (keys %$templ) {
 944             my $v = $templ->{$k};
 945             if ($v eq 'PARAM') {
 946                 $v = $param->{$k};
 947                 $param_used->{$k} = 1;
 948             } elsif ($v eq 'DEST') {
 949                 $v = $param->{dest};
 950                 $param_used->{dest} = 1;
 951             } elsif ($v eq 'SOURCE') {
 952                 $v = $param->{source};
 953                 $param_used->{source} = 1;
 954             }
 955
 956             if (!defined($v)) {
 957                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 958                 raise_param_exc({ macro => $msg }) if $verify;
 959                 die "$msg\n";
 960             }
 961             $rule->{$k} = $v;
 962         }
 963         foreach my $k (keys %$param) {
 964             next if $k eq 'macro';
 965             next if !defined($param->{$k});
 966             next if $param_used->{$k};
 967             if (defined($rule->{$k})) {
 968                 if ($rule->{$k} ne $param->{$k}) {
 969                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 970                     raise_param_exc({ $k => $msg }) if $verify;
 971                     die "$msg\n";
 972                 }
 973             } else {
 974                 $rule->{$k} = $param->{$k};
 975             }
 976         }
 977         push @$rules, $rule;
 978     }
 979
 980     return $rules;
 981 };
 982
 983 sub verify_rule {
 984     my ($rule, $allow_groups) = @_;
 985
 986     my $type = $rule->{type};
 987
 988     raise_param_exc({ type => "missing property"}) if !$type;
 989     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 990
 991     if ($type eq  'in' || $type eq 'out') {
 992         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 993             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 994     } elsif ($type eq 'group') {
 995         raise_param_exc({ type => "security groups not allowed"})
 996             if !$allow_groups;
 997         raise_param_exc({ action => "invalid characters in security group name"})
 998             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
 999     } else {
1000         raise_param_exc({ type => "unknown rule type '$type'"});
1001     }
1002
1003     # fixme: verify $rule->{iface}?
1004
1005     if ($rule->{macro}) {
1006         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1007         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1008         $rule->{macro} = $preferred_name;
1009     }
1010
1011     if ($rule->{dport}) {
1012         eval { parse_port_name_number_or_range($rule->{dport}); };
1013         raise_param_exc({ dport => $@ }) if $@;
1014     }
1015
1016     if ($rule->{sport}) {
1017         eval { parse_port_name_number_or_range($rule->{sport}); };
1018         raise_param_exc({ sport => $@ }) if $@;
1019     }
1020
1021     if ($rule->{source}) {
1022         eval { parse_address_list($rule->{source}); };
1023         raise_param_exc({ source => $@ }) if $@;
1024     }
1025
1026     if ($rule->{dest}) {
1027         eval { parse_address_list($rule->{dest}); };
1028         raise_param_exc({ dest => $@ }) if $@;
1029     }
1030
1031     if ($rule->{macro}) {
1032         &$apply_macro($rule->{macro}, $rule, 1);
1033     }
1034
1035     return $rule;
1036 }
1037
1038 sub copy_rule_data {
1039     my ($rule, $param) = @_;
1040
1041     foreach my $k (keys %$rule_properties) {
1042         if (defined(my $v = $param->{$k})) {
1043             if ($v eq '' || $v eq '-') {
1044                 delete $rule->{$k};
1045             } else {
1046                 $rule->{$k} = $v;
1047             }
1048         } else {
1049             delete $rule->{$k};
1050         }
1051     }
1052
1053     # verify rule now
1054
1055     return $rule;
1056 }
1057
1058 # core functions
1059 my $bridge_firewall_enabled = 0;
1060
1061 sub enable_bridge_firewall {
1062
1063     return if $bridge_firewall_enabled; # only once
1064
1065     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1066     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1067
1068     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1069     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1070
1071     $bridge_firewall_enabled = 1;
1072 }
1073
1074 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1075
1076 sub iptables_restore_cmdlist {
1077     my ($cmdlist) = @_;
1078
1079     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1080 }
1081
1082 sub ipset_restore_cmdlist {
1083     my ($cmdlist) = @_;
1084
1085     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1086 }
1087
1088 sub iptables_get_chains {
1089
1090     my $res = {};
1091
1092     # check what chains we want to track
1093     my $is_pvefw_chain = sub {
1094         my $name = shift;
1095
1096         return 1 if $name =~ m/^PVEFW-\S+$/;
1097
1098         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1099
1100         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1101
1102         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1103
1104         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1105         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1106
1107         return undef;
1108     };
1109
1110     my $table = '';
1111
1112     my $hooks = {};
1113
1114     my $parser = sub {
1115         my $line = shift;
1116
1117         return if $line =~ m/^#/;
1118         return if $line =~ m/^\s*$/;
1119
1120         if ($line =~ m/^\*(\S+)$/) {
1121             $table = $1;
1122             return;
1123         }
1124
1125         return if $table ne 'filter';
1126
1127         if ($line =~ m/^:(\S+)\s/) {
1128             my $chain = $1;
1129             return if !&$is_pvefw_chain($chain);
1130             $res->{$chain} = "unknown";
1131         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1132             my ($chain, $sig) = ($1, $2);
1133             return if !&$is_pvefw_chain($chain);
1134             $res->{$chain} = $sig;
1135         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1136             $hooks->{$1} = 1;
1137         } else {
1138             # simply ignore the rest
1139             return;
1140         }
1141     };
1142
1143     run_command("/sbin/iptables-save", outfunc => $parser);
1144
1145     return wantarray ? ($res, $hooks) : $res;
1146 }
1147
1148 sub iptables_chain_digest {
1149     my ($rules) = @_;
1150     my $digest = Digest::SHA->new('sha1');
1151     foreach my $rule (@$rules) { # order is important
1152         $digest->add($rule);
1153     }
1154     return $digest->b64digest;
1155 }
1156
1157 sub ipset_chain_digest {
1158     my ($rules) = @_;
1159
1160     my $digest = Digest::SHA->new('sha1');
1161     foreach my $rule (sort @$rules) { # note: sorted
1162         $digest->add($rule);
1163     }
1164     return $digest->b64digest;
1165 }
1166
1167 sub ipset_get_chains {
1168
1169     my $res = {};
1170     my $chains = {};
1171
1172     my $parser = sub {
1173         my $line = shift;
1174
1175         return if $line =~ m/^#/;
1176         return if $line =~ m/^\s*$/;
1177         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1178             my $chain = $1;
1179             $line =~ s/\s+$//; # delete trailing white space
1180             push @{$chains->{$chain}}, $line;
1181         } else {
1182             # simply ignore the rest
1183             return;
1184         }
1185     };
1186
1187     run_command("/usr/sbin/ipset save", outfunc => $parser);
1188
1189     # compute digest for each chain
1190     foreach my $chain (keys %$chains) {
1191         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1192     }
1193
1194     return $res;
1195 }
1196
1197 sub ruleset_generate_cmdstr {
1198     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1199
1200     return if defined($rule->{enable}) && !$rule->{enable};
1201
1202     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1203
1204     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1205     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1206
1207     my @cmd = ();
1208
1209     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1210     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1211
1212     my $source = $rule->{source};
1213     my $dest = $rule->{dest};
1214
1215     if ($source) {
1216         if ($source =~ m/^\+/) {
1217             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1218                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1219                 push @cmd, "-m set --match-set PVEFW-$1 src";
1220             } else {
1221                 die "invalid security group name '$source'\n";
1222             }
1223         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1224             my $alias = lc($source);
1225             my $e = $cluster_conf->{aliases}->{$alias};
1226             die "no such alias $source\n" if !$e;
1227             push @cmd, "-s $e->{cidr}";
1228         } elsif ($source =~ m/\-/){
1229             push @cmd, "-m iprange --src-range $source";
1230
1231         } else {
1232             push @cmd, "-s $source";
1233         }
1234     }
1235
1236     if ($dest) {
1237         if ($dest =~ m/^\+/) {
1238             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1239                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1240                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1241             } else {
1242                 die "invalid security group name '$dest'\n";
1243             }
1244         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1245             my $alias = lc($dest);
1246             my $e = $cluster_conf->{aliases}->{$alias};
1247             die "no such alias $dest" if !$e;
1248             push @cmd, "-d $e->{cidr}";
1249         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1250             push @cmd, "-m iprange --dst-range $dest";
1251
1252         } else {
1253             push @cmd, "-d $dest";
1254         }
1255     }
1256
1257     if ($rule->{proto}) {
1258         push @cmd, "-p $rule->{proto}";
1259
1260         my $multiport = 0;
1261         $multiport++ if $nbdport > 1;
1262         $multiport++ if $nbsport > 1;
1263
1264         push @cmd, "--match multiport" if $multiport;
1265
1266         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1267             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1268
1269         if ($rule->{dport}) {
1270             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1271                 # Note: we use dport to store --icmp-type
1272                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1273                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1274             } else {
1275                 if ($nbdport > 1) {
1276                     if ($multiport == 2) {
1277                         push @cmd,  "--ports $rule->{dport}";
1278                     } else {
1279                         push @cmd, "--dports $rule->{dport}";
1280                     }
1281                 } else {
1282                     push @cmd, "--dport $rule->{dport}";
1283                 }
1284             }
1285         }
1286
1287         if ($rule->{sport}) {
1288             if ($nbsport > 1) {
1289                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1290             } else {
1291                 push @cmd, "--sport $rule->{sport}";
1292             }
1293         }
1294     } elsif ($rule->{dport} || $rule->{sport}) {
1295         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1296         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1297     }
1298
1299     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1300
1301     if (my $action = $rule->{action}) {
1302         $action = $actions->{$action} if defined($actions->{$action});
1303         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1304         push @cmd, $goto ? "-g $action" : "-j $action";
1305     }
1306
1307     return scalar(@cmd) ? join(' ', @cmd) : undef;
1308 }
1309
1310 sub ruleset_generate_rule {
1311     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1312
1313     my $rules;
1314
1315     if ($rule->{macro}) {
1316         $rules = &$apply_macro($rule->{macro}, $rule);
1317     } else {
1318         $rules = [ $rule ];
1319     }
1320
1321     # update all or nothing
1322
1323     my @cmds = ();
1324     foreach my $tmp (@$rules) {
1325         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1326             push @cmds, $cmdstr;
1327         }
1328     }
1329
1330     foreach my $cmdstr (@cmds) {
1331         ruleset_addrule($ruleset, $chain, $cmdstr);
1332     }
1333 }
1334
1335 sub ruleset_generate_rule_insert {
1336     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1337
1338     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1339
1340     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1341         ruleset_insertrule($ruleset, $chain, $cmdstr);
1342     }
1343 }
1344
1345 sub ruleset_create_chain {
1346     my ($ruleset, $chain) = @_;
1347
1348     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1349     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1350
1351     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1352
1353     $ruleset->{$chain} = [];
1354 }
1355
1356 sub ruleset_chain_exist {
1357     my ($ruleset, $chain) = @_;
1358
1359     return $ruleset->{$chain} ? 1 : undef;
1360 }
1361
1362 sub ruleset_addrule {
1363    my ($ruleset, $chain, $rule) = @_;
1364
1365    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1366
1367    push @{$ruleset->{$chain}}, "-A $chain $rule";
1368 }
1369
1370 sub ruleset_insertrule {
1371    my ($ruleset, $chain, $rule) = @_;
1372
1373    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1374
1375    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1376 }
1377
1378 sub get_log_rule_base {
1379     my ($chain, $vmid, $msg, $loglevel) = @_;
1380
1381     die "internal error - no log level" if !defined($loglevel);
1382
1383     $vmid = 0 if !defined($vmid);
1384
1385     # Note: we use special format for prefix to pass further
1386     # info to log daemon (VMID, LOGVELEL and CHAIN)
1387
1388     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1389 }
1390
1391 sub ruleset_addlog {
1392     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1393
1394     return if !defined($loglevel);
1395
1396     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1397
1398     $logrule = "$rule $logrule" if defined($rule);
1399
1400     ruleset_addrule($ruleset, $chain, $logrule);
1401 }
1402
1403 sub ruleset_add_chain_policy {
1404     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1405
1406     if ($policy eq 'ACCEPT') {
1407
1408         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1409                               { ACCEPT =>  $accept_action});
1410
1411     } elsif ($policy eq 'DROP') {
1412
1413         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1414
1415         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1416
1417         ruleset_addrule($ruleset, $chain, "-j DROP");
1418     } elsif ($policy eq 'REJECT') {
1419         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1420
1421         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1422
1423         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1424     } else {
1425         # should not happen
1426         die "internal error: unknown policy '$policy'";
1427     }
1428 }
1429
1430 sub ruleset_chain_add_conn_filters {
1431     my ($ruleset, $chain, $accept) = @_;
1432
1433     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1434     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1435 }
1436
1437 sub ruleset_chain_add_input_filters {
1438     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1439
1440     if ($cluster_conf->{ipset}->{blacklist}){
1441         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1442         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1443     }
1444
1445     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1446         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1447     }
1448
1449     if ($options->{tcpflags}) {
1450         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1451     }
1452 }
1453
1454 sub ruleset_create_vm_chain {
1455     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1456
1457     ruleset_create_chain($ruleset, $chain);
1458     my $accept = generate_nfqueue($options);
1459
1460     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1461         if ($direction eq 'OUT') {
1462             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1463                                                       proto => 'udp', sport => 68, dport => 67 });
1464         } else {
1465             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1466                                                       proto => 'udp', sport => 67, dport => 68 });
1467         }
1468     }
1469
1470     if ($direction eq 'OUT') {
1471         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1472             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1473         }
1474         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1475     }
1476 }
1477
1478 sub ruleset_add_group_rule {
1479     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1480
1481     my $group = $rule->{action};
1482     my $group_chain = "GROUP-$group-$direction";
1483     if(!ruleset_chain_exist($ruleset, $group_chain)){
1484         generate_group_rules($ruleset, $cluster_conf, $group);
1485     }
1486
1487     if ($direction eq 'OUT' && $rule->{iface_out}) {
1488         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1489     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1490         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1491     } else {
1492         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1493     }
1494
1495     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1496 }
1497
1498 sub ruleset_generate_vm_rules {
1499     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1500
1501     my $lc_direction = lc($direction);
1502
1503     my $in_accept = generate_nfqueue($options);
1504
1505     foreach my $rule (@$rules) {
1506         next if $rule->{iface} && $rule->{iface} ne $netid;
1507         next if !$rule->{enable};
1508         if ($rule->{type} eq 'group') {
1509             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1510                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1511         } else {
1512             next if $rule->{type} ne $lc_direction;
1513             eval {
1514                 if ($direction eq 'OUT') {
1515                     ruleset_generate_rule($ruleset, $chain, $rule,
1516                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1517                                           undef, $cluster_conf);
1518                 } else {
1519                     ruleset_generate_rule($ruleset, $chain, $rule,
1520                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1521                                           undef, $cluster_conf);
1522                 }
1523             };
1524             warn $@ if $@;
1525         }
1526     }
1527 }
1528
1529 sub generate_nfqueue {
1530     my ($options) = @_;
1531
1532     if ($options->{ips}) {
1533         my $action = "NFQUEUE";
1534         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1535             if (defined($3) && defined($1)) {
1536                 $action .= " --queue-balance $1:$3";
1537             } elsif (defined($1)) {
1538                 $action .= " --queue-num $1";
1539             }
1540         }
1541         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1542         return $action;
1543     } else {
1544         return "ACCEPT";
1545     }
1546 }
1547
1548 sub ruleset_generate_vm_ipsrules {
1549     my ($ruleset, $options, $direction, $iface) = @_;
1550
1551     if ($options->{ips} && $direction eq 'IN') {
1552         my $nfqueue = generate_nfqueue($options);
1553
1554         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1555             ruleset_create_chain($ruleset, "PVEFW-IPS");
1556         }
1557
1558         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1559     }
1560 }
1561
1562 sub generate_venet_rules_direction {
1563     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1564
1565     my $lc_direction = lc($direction);
1566
1567     my $rules = $vmfw_conf->{rules};
1568
1569     my $options = $vmfw_conf->{options};
1570     my $hostfw_options = $vmfw_conf->{options};
1571     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1572
1573     my $chain = "venet0-$vmid-$direction";
1574
1575     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1576
1577     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1578
1579     # implement policy
1580     my $policy;
1581
1582     if ($direction eq 'OUT') {
1583         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1584     } else {
1585         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1586     }
1587
1588     my $accept = generate_nfqueue($options);
1589     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1590     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1591
1592     if ($direction eq 'OUT') {
1593         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1594             action => $chain,
1595             source => $ip,
1596             iface_in => 'venet0'});
1597     } else {
1598         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1599             action => $chain,
1600             dest => $ip,
1601             iface_out => 'venet0'});
1602     }
1603 }
1604
1605 sub generate_tap_rules_direction {
1606     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1607
1608     my $lc_direction = lc($direction);
1609
1610     my $rules = $vmfw_conf->{rules};
1611
1612     my $options = $vmfw_conf->{options};
1613     my $hostfw_options = $hostfw_conf->{options};
1614     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1615
1616     my $tapchain = "$iface-$direction";
1617
1618     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1619
1620     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1621
1622     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1623
1624     # implement policy
1625     my $policy;
1626
1627     if ($direction eq 'OUT') {
1628         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1629     } else {
1630         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1631     }
1632
1633     my $accept = generate_nfqueue($options);
1634     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1635     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1636
1637     # plug the tap chain to bridge chain
1638     if ($direction eq 'IN') {
1639         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1640                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1641     } else {
1642         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1643                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1644     }
1645 }
1646
1647 sub enable_host_firewall {
1648     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1649
1650     my $options = $hostfw_conf->{options};
1651     my $cluster_options = $cluster_conf->{options};
1652     my $rules = $hostfw_conf->{rules};
1653     my $cluster_rules = $cluster_conf->{rules};
1654
1655     # host inbound firewall
1656     my $chain = "PVEFW-HOST-IN";
1657     ruleset_create_chain($ruleset, $chain);
1658
1659     my $loglevel = get_option_log_level($options, "log_level_in");
1660
1661     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1662
1663     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1664     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1665
1666     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1667     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1668     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1669
1670     # we use RETURN because we need to check also tap rules
1671     my $accept_action = 'RETURN';
1672
1673     # add host rules first, so that cluster wide rules can be overwritten
1674     foreach my $rule (@$rules, @$cluster_rules) {
1675         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1676         if ($rule->{type} eq 'group') {
1677             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1678         } elsif ($rule->{type} eq 'in') {
1679             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1680                                   undef, $cluster_conf);
1681         }
1682         delete $rule->{iface_in};
1683     }
1684
1685     # implement input policy
1686     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1687     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1688
1689     # host outbound firewall
1690     $chain = "PVEFW-HOST-OUT";
1691     ruleset_create_chain($ruleset, $chain);
1692
1693     $loglevel = get_option_log_level($options, "log_level_out");
1694
1695     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1696
1697     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1698
1699     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1700     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1701     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1702
1703     # we use RETURN because we may want to check other thigs later
1704     $accept_action = 'RETURN';
1705
1706     # add host rules first, so that cluster wide rules can be overwritten
1707     foreach my $rule (@$rules, @$cluster_rules) {
1708         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1709         if ($rule->{type} eq 'group') {
1710             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1711         } elsif ($rule->{type} eq 'out') {
1712             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1713                                   undef, $cluster_conf);
1714         }
1715         delete $rule->{iface_out};
1716     }
1717
1718     # implement output policy
1719     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1720     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1721
1722     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1723     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1724 }
1725
1726 sub generate_group_rules {
1727     my ($ruleset, $cluster_conf, $group) = @_;
1728
1729     my $rules = $cluster_conf->{groups}->{$group};
1730
1731     if (!$rules) {
1732         warn "no such security group '$group'\n";
1733         $rules = []; # create empty chain
1734     }
1735
1736     my $chain = "GROUP-${group}-IN";
1737
1738     ruleset_create_chain($ruleset, $chain);
1739     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1740
1741     foreach my $rule (@$rules) {
1742         next if $rule->{type} ne 'in';
1743         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1744     }
1745
1746     $chain = "GROUP-${group}-OUT";
1747
1748     ruleset_create_chain($ruleset, $chain);
1749     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1750
1751     foreach my $rule (@$rules) {
1752         next if $rule->{type} ne 'out';
1753         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1754         # check also other tap rules later
1755         ruleset_generate_rule($ruleset, $chain, $rule,
1756                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1757     }
1758 }
1759
1760 my $MAX_NETS = 32;
1761 my $valid_netdev_names = {};
1762 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1763     $valid_netdev_names->{"net$i"} = 1;
1764 }
1765
1766 sub parse_fw_rule {
1767     my ($line, $need_iface, $allow_groups) = @_;
1768
1769     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1770
1771     # we can add single line comments to the end of the rule
1772     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1773
1774     # we can disable a rule when prefixed with '|'
1775     my $enable = 1;
1776
1777     $enable = 0 if $line =~ s/^\|//;
1778
1779     my @data = split(/\s+/, $line);
1780     my $expected_elements = $need_iface ? 8 : 7;
1781
1782     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1783
1784     if ($need_iface) {
1785         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1786     } else {
1787         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1788     }
1789
1790     die "incomplete rule\n" if ! ($type && $action);
1791
1792     my $macro;
1793
1794     $type = lc($type);
1795
1796     if ($type eq  'in' || $type eq 'out') {
1797         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1798             # OK
1799         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1800             $action = $2;
1801             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1802             die "unknown macro '$1'\n" if !$preferred_name;
1803             $macro = $preferred_name;
1804         } else {
1805             die "unknown action '$action'\n";
1806         }
1807     } elsif ($type eq 'group') {
1808         die "wrong number of rule elements\n" if scalar(@data) > 3;
1809         die "groups disabled\n" if !$allow_groups;
1810
1811         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1812     } else {
1813         die "unknown rule type '$type'\n";
1814     }
1815
1816     if ($need_iface) {
1817         $iface = undef if $iface && $iface eq '-';
1818     }
1819
1820     $proto = undef if $proto && $proto eq '-';
1821     pve_fw_verify_protocol_spec($proto) if $proto;
1822
1823     $source = undef if $source && $source eq '-';
1824     $dest = undef if $dest && $dest eq '-';
1825
1826     $dport = undef if $dport && $dport eq '-';
1827     $sport = undef if $sport && $sport eq '-';
1828
1829     parse_port_name_number_or_range($dport) if defined($dport);
1830     parse_port_name_number_or_range($sport) if defined($sport);
1831
1832     parse_address_list($source) if $source;
1833     parse_address_list($dest) if $dest;
1834
1835     return {
1836         type => $type,
1837         enable => $enable,
1838         comment => $comment,
1839         action => $action,
1840         macro => $macro,
1841         iface => $iface,
1842         source => $source,
1843         dest => $dest,
1844         proto => $proto,
1845         dport => $dport,
1846         sport => $sport,
1847     };
1848 }
1849
1850 sub parse_vmfw_option {
1851     my ($line) = @_;
1852
1853     my ($opt, $value);
1854
1855     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1856
1857     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1858         $opt = lc($1);
1859         $value = int($2);
1860     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1861         $opt = lc($1);
1862         $value = $2 ? lc($3) : '';
1863     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1864         $opt = lc($1);
1865         $value = uc($3);
1866     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1867         $opt = lc($1);
1868         $value = $2;
1869     } else {
1870         chomp $line;
1871         die "can't parse option '$line'\n"
1872     }
1873
1874     return ($opt, $value);
1875 }
1876
1877 sub parse_hostfw_option {
1878     my ($line) = @_;
1879
1880     my ($opt, $value);
1881
1882     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1883
1884     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1885         $opt = lc($1);
1886         $value = int($2);
1887     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1888         $opt = lc($1);
1889         $value = $2 ? lc($3) : '';
1890     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1891         $opt = lc($1);
1892         $value = int($2);
1893     } else {
1894         chomp $line;
1895         die "can't parse option '$line'\n"
1896     }
1897
1898     return ($opt, $value);
1899 }
1900
1901 sub parse_clusterfw_option {
1902     my ($line) = @_;
1903
1904     my ($opt, $value);
1905
1906     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1907         $opt = lc($1);
1908         $value = int($2);
1909     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1910         $opt = lc($1);
1911         $value = uc($3);
1912     } else {
1913         chomp $line;
1914         die "can't parse option '$line'\n"
1915     }
1916
1917     return ($opt, $value);
1918 }
1919
1920 sub parse_clusterfw_alias {
1921     my ($line) = @_;
1922
1923     # we can add single line comments to the end of the line
1924     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1925
1926     if ($line =~ m/^(\S+)\s(\S+)$/) {
1927         my ($name, $cidr) = ($1, $2);
1928         $cidr =~ s|/32$||;
1929         pve_verify_ipv4_or_cidr($cidr);
1930         my $data = {
1931             name => $name,
1932             cidr => $cidr,
1933         };
1934         $data->{comment} = $comment  if $comment;
1935         return $data;
1936     }
1937
1938     return undef;
1939 }
1940
1941 sub parse_vm_fw_rules {
1942     my ($filename, $fh) = @_;
1943
1944     my $res = { rules => [], options => {}};
1945
1946     my $section;
1947
1948     while (defined(my $line = <$fh>)) {
1949         next if $line =~ m/^#/;
1950         next if $line =~ m/^\s*$/;
1951
1952         my $linenr = $fh->input_line_number();
1953         my $prefix = "$filename (line $linenr)";
1954
1955         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1956             $section = lc($1);
1957             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1958             next;
1959         }
1960         if (!$section) {
1961             warn "$prefix: skip line - no section";
1962             next;
1963         }
1964
1965         next if !$res->{$section}; # skip undefined section
1966
1967         if ($section eq 'options') {
1968             eval {
1969                 my ($opt, $value) = parse_vmfw_option($line);
1970                 $res->{options}->{$opt} = $value;
1971             };
1972             warn "$prefix: $@" if $@;
1973             next;
1974         }
1975
1976         my $rule;
1977         eval { $rule = parse_fw_rule($line, 1, 1); };
1978         if (my $err = $@) {
1979             warn "$prefix: $err";
1980             next;
1981         }
1982
1983         push @{$res->{$section}}, $rule;
1984     }
1985
1986     return $res;
1987 }
1988
1989 sub parse_host_fw_rules {
1990     my ($filename, $fh) = @_;
1991
1992     my $res = { rules => [], options => {}};
1993
1994     my $section;
1995
1996     while (defined(my $line = <$fh>)) {
1997         next if $line =~ m/^#/;
1998         next if $line =~ m/^\s*$/;
1999
2000         my $linenr = $fh->input_line_number();
2001         my $prefix = "$filename (line $linenr)";
2002
2003         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2004             $section = lc($1);
2005             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2006             next;
2007         }
2008         if (!$section) {
2009             warn "$prefix: skip line - no section";
2010             next;
2011         }
2012
2013         next if !$res->{$section}; # skip undefined section
2014
2015         if ($section eq 'options') {
2016             eval {
2017                 my ($opt, $value) = parse_hostfw_option($line);
2018                 $res->{options}->{$opt} = $value;
2019             };
2020             warn "$prefix: $@" if $@;
2021             next;
2022         }
2023
2024         my $rule;
2025         eval { $rule = parse_fw_rule($line, 1, 1); };
2026         if (my $err = $@) {
2027             warn "$prefix: $err";
2028             next;
2029         }
2030
2031         push @{$res->{$section}}, $rule;
2032     }
2033
2034     return $res;
2035 }
2036
2037 sub parse_cluster_fw_rules {
2038     my ($filename, $fh) = @_;
2039
2040     my $section;
2041     my $group;
2042
2043     my $res = {
2044         rules => [],
2045         options => {},
2046         aliases => {},
2047         groups => {},
2048         group_comments => {},
2049         ipset => {} ,
2050         ipset_comments => {},
2051     };
2052
2053     while (defined(my $line = <$fh>)) {
2054         next if $line =~ m/^#/;
2055         next if $line =~ m/^\s*$/;
2056
2057         my $linenr = $fh->input_line_number();
2058         my $prefix = "$filename (line $linenr)";
2059
2060         if ($line =~ m/^\[options\]$/i) {
2061             $section = 'options';
2062             next;
2063         }
2064
2065         if ($line =~ m/^\[aliases\]$/i) {
2066             $section = 'aliases';
2067             next;
2068         }
2069
2070         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2071             $section = 'groups';
2072             $group = lc($1);
2073             my $comment = $2;
2074             $res->{$section}->{$group} = [];
2075             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2076                 if $comment;
2077             next;
2078         }
2079
2080         if ($line =~ m/^\[rules\]$/i) {
2081             $section = 'rules';
2082             next;
2083         }
2084
2085         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2086             $section = 'ipset';
2087             $group = lc($1);
2088             my $comment = $2;
2089             $res->{$section}->{$group} = [];
2090             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2091                 if $comment;
2092             next;
2093         }
2094
2095         if (!$section) {
2096             warn "$prefix: skip line - no section\n";
2097             next;
2098         }
2099
2100         if ($section eq 'options') {
2101             eval {
2102                 my ($opt, $value) = parse_clusterfw_option($line);
2103                 $res->{options}->{$opt} = $value;
2104             };
2105             warn "$prefix: $@" if $@;
2106         } elsif ($section eq 'aliases') {
2107             eval {
2108                 my $data = parse_clusterfw_alias($line);
2109                 $res->{aliases}->{lc($data->{name})} = $data;
2110             };
2111             warn "$prefix: $@" if $@;
2112         } elsif ($section eq 'rules') {
2113             my $rule;
2114             eval { $rule = parse_fw_rule($line, 1, 1); };
2115             if (my $err = $@) {
2116                 warn "$prefix: $err";
2117                 next;
2118             }
2119             push @{$res->{$section}}, $rule;
2120         } elsif ($section eq 'groups') {
2121             my $rule;
2122             eval { $rule = parse_fw_rule($line, 0, 0); };
2123             if (my $err = $@) {
2124                 warn "$prefix: $err";
2125                 next;
2126             }
2127             push @{$res->{$section}->{$group}}, $rule;
2128         } elsif ($section eq 'ipset') {
2129             # we can add single line comments to the end of the rule
2130             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2131
2132             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2133             my $nomatch = $1;
2134             my $cidr = $2;
2135
2136             if($cidr !~ m/^${ip_alias_pattern}$/) {
2137                 $cidr =~ s|/32$||;
2138
2139                 eval { pve_verify_ipv4_or_cidr($cidr); };
2140                 if (my $err = $@) {
2141                     warn "$prefix: $cidr - $err";
2142                     next;
2143                 }
2144             }
2145
2146             my $entry = { cidr => $cidr };
2147             $entry->{nomatch} = 1 if $nomatch;
2148             $entry->{comment} = $comment if $comment;
2149
2150             push @{$res->{$section}->{$group}}, $entry;
2151         }
2152     }
2153
2154     return $res;
2155 }
2156
2157 sub run_locked {
2158     my ($code, @param) = @_;
2159
2160     my $timeout = 10;
2161
2162     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2163
2164     die $@ if $@;
2165
2166     return $res;
2167 }
2168
2169 sub read_local_vm_config {
2170
2171     my $openvz = {};
2172     my $qemu = {};
2173
2174     my $vmdata = { openvz => $openvz, qemu => $qemu };
2175
2176     my $vmlist = PVE::Cluster::get_vmlist();
2177     return $vmdata if !$vmlist || !$vmlist->{ids};
2178     my $ids = $vmlist->{ids};
2179
2180     foreach my $vmid (keys %$ids) {
2181         next if !$vmid; # skip VE0
2182         my $d = $ids->{$vmid};
2183         next if !$d->{node} || $d->{node} ne $nodename;
2184         next if !$d->{type};
2185         if ($d->{type} eq 'openvz') {
2186             if ($have_pve_manager) {
2187                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2188                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2189                     $openvz->{$vmid} = $conf;
2190                 }
2191             }
2192         } elsif ($d->{type} eq 'qemu') {
2193             if ($have_qemu_server) {
2194                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2195                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2196                     $qemu->{$vmid} = $conf;
2197                 }
2198             }
2199         }
2200     }
2201
2202     return $vmdata;
2203 };
2204
2205 sub load_vmfw_conf {
2206     my ($vmid, $dir) = @_;
2207
2208     my $vmfw_conf = {};
2209
2210     $dir = "/etc/pve/firewall" if !defined($dir);
2211
2212     my $filename = "$dir/$vmid.fw";
2213     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2214         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2215     }
2216
2217     return $vmfw_conf;
2218 }
2219
2220 my $format_rules = sub {
2221     my ($rules, $need_iface) = @_;
2222
2223     my $raw = '';
2224
2225     foreach my $rule (@$rules) {
2226         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2227             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2228             $raw .= uc($rule->{type});
2229             if ($rule->{macro}) {
2230                 $raw .= " $rule->{macro}($rule->{action})";
2231             } else {
2232                 $raw .= " " . $rule->{action};
2233             }
2234             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2235
2236             if ($rule->{type} ne  'group')  {
2237                 $raw .= " " . ($rule->{source} || '-');
2238                 $raw .= " " . ($rule->{dest} || '-');
2239                 $raw .= " " . ($rule->{proto} || '-');
2240                 $raw .= " " . ($rule->{dport} || '-');
2241                 $raw .= " " . ($rule->{sport} || '-');
2242             }
2243
2244             $raw .= " # " . encode('utf8', $rule->{comment})
2245                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2246             $raw .= "\n";
2247         } else {
2248             die "unknown rule type '$rule->{type}'";
2249         }
2250     }
2251
2252     return $raw;
2253 };
2254
2255 my $format_options = sub {
2256     my ($options) = @_;
2257
2258     my $raw = '';
2259
2260     $raw .= "[OPTIONS]\n\n";
2261     foreach my $opt (keys %$options) {
2262         $raw .= "$opt: $options->{$opt}\n";
2263     }
2264     $raw .= "\n";
2265
2266     return $raw;
2267 };
2268
2269 my $format_aliases = sub {
2270     my ($aliases) = @_;
2271
2272     my $raw = '';
2273
2274     $raw .= "[ALIASES]\n\n";
2275     foreach my $k (keys %$aliases) {
2276         my $e = $aliases->{$k};
2277         $raw .= "$e->{name} $e->{cidr}";
2278         $raw .= " # " . encode('utf8', $e->{comment})
2279             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2280         $raw .= "\n";
2281     }
2282     $raw .= "\n";
2283
2284     return $raw;
2285 };
2286
2287 my $format_ipset = sub {
2288     my ($options) = @_;
2289
2290     my $raw = '';
2291
2292     my $nethash = {};
2293     foreach my $entry (@$options) {
2294         $nethash->{$entry->{cidr}} = $entry;
2295     }
2296
2297     foreach my $cidr (sort keys %$nethash) {
2298         my $entry = $nethash->{$cidr};
2299         my $line = $entry->{nomatch} ? '!' : '';
2300         $line .= $entry->{cidr};
2301         $line .= " # " . encode('utf8', $entry->{comment})
2302             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2303         $raw .= "$line\n";
2304     }
2305
2306     return $raw;
2307 };
2308
2309 sub save_vmfw_conf {
2310     my ($vmid, $vmfw_conf) = @_;
2311
2312     my $raw = '';
2313
2314     my $options = $vmfw_conf->{options};
2315     $raw .= &$format_options($options) if scalar(keys %$options);
2316
2317     my $rules = $vmfw_conf->{rules} || [];
2318     if (scalar(@$rules)) {
2319         $raw .= "[RULES]\n\n";
2320         $raw .= &$format_rules($rules, 1);
2321         $raw .= "\n";
2322     }
2323
2324     my $filename = "/etc/pve/firewall/$vmid.fw";
2325     PVE::Tools::file_set_contents($filename, $raw);
2326 }
2327
2328 sub read_vm_firewall_configs {
2329     my ($vmdata, $dir) = @_;
2330
2331     my $vmfw_configs = {};
2332
2333     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2334         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2335         next if !$vmfw_conf->{options}; # skip if file does not exists
2336         $vmfw_configs->{$vmid} = $vmfw_conf;
2337     }
2338
2339     return $vmfw_configs;
2340 }
2341
2342 sub get_option_log_level {
2343     my ($options, $k) = @_;
2344
2345     my $v = $options->{$k};
2346     $v = $default_log_level if !defined($v);
2347
2348     return undef if $v eq '' || $v eq 'nolog';
2349
2350     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2351
2352     return $v if ($v >= 0) && ($v <= 7);
2353
2354     warn "unknown log level ($k = '$v')\n";
2355
2356     return undef;
2357 }
2358
2359 sub generate_std_chains {
2360     my ($ruleset, $options) = @_;
2361
2362     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2363
2364     # same as shorewall smurflog.
2365     my $chain = 'PVEFW-smurflog';
2366     $pve_std_chains->{$chain} = [];
2367
2368     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2369     push @{$pve_std_chains->{$chain}}, "-j DROP";
2370
2371     # same as shorewall logflags action.
2372     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2373     $chain = 'PVEFW-logflags';
2374     $pve_std_chains->{$chain} = [];
2375
2376     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2377     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2378     push @{$pve_std_chains->{$chain}}, "-j DROP";
2379
2380     foreach my $chain (keys %$pve_std_chains) {
2381         ruleset_create_chain($ruleset, $chain);
2382         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2383             if (ref($rule)) {
2384                 ruleset_generate_rule($ruleset, $chain, $rule);
2385             } else {
2386                 ruleset_addrule($ruleset, $chain, $rule);
2387             }
2388         }
2389     }
2390 }
2391
2392 sub generate_ipset_chains {
2393     my ($ipset_ruleset, $fw_conf) = @_;
2394
2395     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2396         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2397     }
2398 }
2399
2400 sub generate_ipset {
2401     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2402
2403     my $hashsize = scalar(@$options);
2404     if ($hashsize <= 64) {
2405         $hashsize = 64;
2406     } else {
2407         $hashsize = round_powerof2($hashsize);
2408     }
2409
2410     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2411
2412     # remove duplicates
2413     my $nethash = {};
2414     foreach my $entry (@$options) {
2415         my $cidr = $entry->{cidr};
2416         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2417             my $alias = lc($cidr);
2418             if ($aliases->{$alias}) {
2419                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2420                 $nethash->{$entry->{cidr}} = $entry;
2421             } else {
2422                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2423             }
2424         } else {
2425             $nethash->{$entry->{cidr}} = $entry;
2426         }
2427     }
2428
2429     foreach my $cidr (sort keys %$nethash) {
2430         my $entry = $nethash->{$cidr};
2431
2432         my $cmd = "add $name $cidr";
2433         if ($entry->{nomatch}) {
2434             if ($feature_ipset_nomatch) {
2435                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2436             } else {
2437                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2438             }
2439         } else {
2440             push @{$ipset_ruleset->{$name}}, $cmd;
2441         }
2442     }
2443 }
2444
2445 sub round_powerof2 {
2446     my ($int) = @_;
2447
2448     $int--;
2449     $int |= $int >> $_ foreach (1,2,4,8,16);
2450     return ++$int;
2451 }
2452
2453 sub load_clusterfw_conf {
2454     my ($filename) = @_;
2455
2456     $filename = $clusterfw_conf_filename if !defined($filename);
2457
2458     my $cluster_conf = {};
2459     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2460         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2461     }
2462
2463     return $cluster_conf;
2464 }
2465
2466 sub save_clusterfw_conf {
2467     my ($cluster_conf) = @_;
2468
2469     my $raw = '';
2470
2471     my $options = $cluster_conf->{options};
2472     $raw .= &$format_options($options) if scalar(keys %$options);
2473
2474     my $aliases = $cluster_conf->{aliases};
2475     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2476
2477     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2478         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2479             my $utf8comment = encode('utf8', $comment);
2480             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2481         } else {
2482             $raw .= "[IPSET $ipset]\n\n";
2483         }
2484         my $options = $cluster_conf->{ipset}->{$ipset};
2485         $raw .= &$format_ipset($options);
2486         $raw .= "\n";
2487     }
2488
2489     my $rules = $cluster_conf->{rules};
2490     if (scalar(@$rules)) {
2491         $raw .= "[RULES]\n\n";
2492         $raw .= &$format_rules($rules, 1);
2493         $raw .= "\n";
2494     }
2495
2496     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2497         my $rules = $cluster_conf->{groups}->{$group};
2498         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2499             my $utf8comment = encode('utf8', $comment);
2500             $raw .= "[group $group] # $utf8comment\n\n";
2501         } else {
2502             $raw .= "[group $group]\n\n";
2503         }
2504
2505         $raw .= &$format_rules($rules, 0);
2506         $raw .= "\n";
2507     }
2508
2509     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2510 }
2511
2512 sub load_hostfw_conf {
2513     my ($filename) = @_;
2514
2515     $filename = $hostfw_conf_filename if !defined($filename);
2516
2517     my $hostfw_conf = {};
2518     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2519         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2520     }
2521     return $hostfw_conf;
2522 }
2523
2524 sub save_hostfw_conf {
2525     my ($hostfw_conf) = @_;
2526
2527     my $raw = '';
2528
2529     my $options = $hostfw_conf->{options};
2530     $raw .= &$format_options($options) if scalar(keys %$options);
2531
2532     my $rules = $hostfw_conf->{rules};
2533     if (scalar(@$rules)) {
2534         $raw .= "[RULES]\n\n";
2535         $raw .= &$format_rules($rules, 1);
2536         $raw .= "\n";
2537     }
2538
2539     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2540 }
2541
2542 sub compile {
2543     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2544
2545     my $vmfw_configs;
2546
2547     if ($vmdata) { # test mode
2548         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2549         my $filename = "$testdir/cluster.fw";
2550         die "missing test file '$filename'\n" if ! -f $filename;
2551         $cluster_conf = load_clusterfw_conf($filename);
2552
2553         $filename = "$testdir/host.fw";
2554         die "missing test file '$filename'\n" if ! -f $filename;
2555         $hostfw_conf = load_hostfw_conf($filename);
2556
2557         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2558     } else { # normal operation
2559         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2560
2561         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2562
2563         $vmdata = read_local_vm_config();
2564         $vmfw_configs = read_vm_firewall_configs($vmdata);
2565     }
2566
2567
2568     $cluster_conf->{ipset}->{venet0} = [];
2569
2570     my $ruleset = {};
2571
2572     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2573     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2574
2575     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2576
2577     my $hostfw_options = $hostfw_conf->{options} || {};
2578
2579     # fixme: what log level should we use here?
2580     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2581
2582     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2583
2584     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2585     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2586     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2587
2588     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2589     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2590
2591     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2592
2593     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2594     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2595
2596     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2597     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2598
2599     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2600
2601     generate_std_chains($ruleset, $hostfw_options);
2602
2603     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2604
2605     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2606
2607     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2608
2609     # generate firewall rules for QEMU VMs
2610     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2611         my $conf = $vmdata->{qemu}->{$vmid};
2612         my $vmfw_conf = $vmfw_configs->{$vmid};
2613         next if !$vmfw_conf;
2614         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2615
2616         foreach my $netid (keys %$conf) {
2617             next if $netid !~ m/^net(\d+)$/;
2618             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2619             next if !$net->{firewall};
2620             my $iface = "tap${vmid}i$1";
2621
2622             my $macaddr = $net->{macaddr};
2623             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2624                                          $vmfw_conf, $vmid, 'IN');
2625             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2626                                          $vmfw_conf, $vmid, 'OUT');
2627         }
2628     }
2629
2630     # generate firewall rules for OpenVZ containers
2631     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2632         my $conf = $vmdata->{openvz}->{$vmid};
2633
2634         my $vmfw_conf = $vmfw_configs->{$vmid};
2635         next if !$vmfw_conf;
2636         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2637
2638         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2639             my $ip = $conf->{ip_address}->{value};
2640             $ip =~ s/\s+/,/g;
2641             parse_address_list($ip); # make sure we have a valid $ip list
2642
2643             my @ips = split(',', $ip);
2644
2645             foreach my $singleip (@ips) {
2646                 my $venet0ipset = {};
2647                 $venet0ipset->{cidr} = $singleip;
2648                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2649             }
2650
2651             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2652             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2653         }
2654
2655         if ($conf->{netif} && $conf->{netif}->{value}) {
2656             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2657             foreach my $netid (keys %$netif) {
2658                 my $d = $netif->{$netid};
2659
2660                 my $macaddr = $d->{mac};
2661                 my $iface = $d->{host_ifname};
2662                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2663                                              $vmfw_conf, $vmid, 'IN');
2664                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2665                                              $vmfw_conf, $vmid, 'OUT');
2666             }
2667         }
2668     }
2669
2670     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2671         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2672     }
2673
2674     my $ipset_ruleset = {};
2675     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2676
2677     return ($ruleset, $ipset_ruleset);
2678 }
2679
2680 sub get_ruleset_status {
2681     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2682
2683     my $statushash = {};
2684
2685     foreach my $chain (sort keys %$ruleset) {
2686         my $sig = &$digest_fn($ruleset->{$chain});
2687
2688         $statushash->{$chain}->{sig} = $sig;
2689
2690         my $oldsig = $active_chains->{$chain};
2691         if (!defined($oldsig)) {
2692             $statushash->{$chain}->{action} = 'create';
2693         } else {
2694             if ($oldsig eq $sig) {
2695                 $statushash->{$chain}->{action} = 'exists';
2696             } else {
2697                 $statushash->{$chain}->{action} = 'update';
2698             }
2699         }
2700         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2701         foreach my $cmd (@{$ruleset->{$chain}}) {
2702             print "\t$cmd\n" if $verbose;
2703         }
2704     }
2705
2706     foreach my $chain (sort keys %$active_chains) {
2707         if (!defined($ruleset->{$chain})) {
2708             my $sig = $active_chains->{$chain};
2709             $statushash->{$chain}->{action} = 'delete';
2710             $statushash->{$chain}->{sig} = $sig;
2711             print "delete $chain ($sig)\n" if $verbose;
2712         }
2713     }
2714
2715     return $statushash;
2716 }
2717
2718 sub print_sig_rule {
2719     my ($chain, $sig) = @_;
2720
2721     # We just use this to store a SHA1 checksum used to detect changes
2722     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2723 }
2724
2725 sub get_ruleset_cmdlist {
2726     my ($ruleset, $verbose) = @_;
2727
2728     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2729
2730     my ($active_chains, $hooks) = iptables_get_chains();
2731     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2732
2733     # create missing chains first
2734     foreach my $chain (sort keys %$ruleset) {
2735         my $stat = $statushash->{$chain};
2736         die "internal error" if !$stat;
2737         next if $stat->{action} ne 'create';
2738
2739         $cmdlist .= ":$chain - [0:0]\n";
2740     }
2741
2742     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2743         if (!$hooks->{$h}) {
2744             $cmdlist .= "-A $h -j PVEFW-$h\n";
2745         }
2746     }
2747
2748     foreach my $chain (sort keys %$ruleset) {
2749         my $stat = $statushash->{$chain};
2750         die "internal error" if !$stat;
2751
2752         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2753             $cmdlist .= "-F $chain\n";
2754             foreach my $cmd (@{$ruleset->{$chain}}) {
2755                 $cmdlist .= "$cmd\n";
2756             }
2757             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2758         } elsif ($stat->{action} eq 'delete') {
2759             die "internal error"; # this should not happen
2760         } elsif ($stat->{action} eq 'exists') {
2761             # do nothing
2762         } else {
2763             die "internal error - unknown status '$stat->{action}'";
2764         }
2765     }
2766
2767     foreach my $chain (keys %$statushash) {
2768         next if $statushash->{$chain}->{action} ne 'delete';
2769         $cmdlist .= "-F $chain\n";
2770     }
2771     foreach my $chain (keys %$statushash) {
2772         next if $statushash->{$chain}->{action} ne 'delete';
2773         next if $chain eq 'PVEFW-INPUT';
2774         next if $chain eq 'PVEFW-OUTPUT';
2775         next if $chain eq 'PVEFW-FORWARD';
2776         $cmdlist .= "-X $chain\n";
2777     }
2778
2779     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2780
2781     $cmdlist .= "COMMIT\n";
2782
2783     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2784 }
2785
2786 sub get_ipset_cmdlist {
2787     my ($ruleset, $verbose) = @_;
2788
2789     my $cmdlist = "";
2790
2791     my $delete_cmdlist = "";
2792
2793     my $active_chains = ipset_get_chains();
2794     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2795
2796     # remove stale _swap chains
2797     foreach my $chain (keys %$active_chains) {
2798         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2799             $cmdlist .= "destroy $chain\n";
2800         }
2801     }
2802
2803     foreach my $chain (sort keys %$ruleset) {
2804         my $stat = $statushash->{$chain};
2805         die "internal error" if !$stat;
2806
2807         if ($stat->{action} eq 'create') {
2808             foreach my $cmd (@{$ruleset->{$chain}}) {
2809                 $cmdlist .= "$cmd\n";
2810             }
2811         }
2812
2813         if ($stat->{action} eq 'update') {
2814             my $chain_swap = $chain."_swap";
2815
2816             foreach my $cmd (@{$ruleset->{$chain}}) {
2817                 $cmd =~ s/$chain/$chain_swap/;
2818                 $cmdlist .= "$cmd\n";
2819             }
2820             $cmdlist .= "swap $chain_swap $chain\n";
2821             $cmdlist .= "flush $chain_swap\n";
2822             $cmdlist .= "destroy $chain_swap\n";
2823         }
2824
2825     }
2826
2827     foreach my $chain (keys %$statushash) {
2828         next if $statushash->{$chain}->{action} ne 'delete';
2829
2830         $delete_cmdlist .= "flush $chain\n";
2831         $delete_cmdlist .= "destroy $chain\n";
2832     }
2833
2834     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2835
2836     return ($cmdlist, $delete_cmdlist, $changes);
2837 }
2838
2839 sub apply_ruleset {
2840     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2841
2842     enable_bridge_firewall();
2843
2844     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2845         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2846
2847     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2848
2849     if ($verbose) {
2850         if ($ipset_changes) {
2851             print "ipset changes:\n";
2852             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2853             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2854         }
2855
2856         if ($changes) {
2857             print "iptables changes:\n";
2858             print $cmdlist;
2859         }
2860     }
2861
2862     ipset_restore_cmdlist($ipset_create_cmdlist);
2863
2864     iptables_restore_cmdlist($cmdlist);
2865
2866     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2867
2868     # test: re-read status and check if everything is up to date
2869     my $active_chains = iptables_get_chains();
2870     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2871
2872     my $errors;
2873     foreach my $chain (sort keys %$ruleset) {
2874         my $stat = $statushash->{$chain};
2875         if ($stat->{action} ne 'exists') {
2876             warn "unable to update chain '$chain'\n";
2877             $errors = 1;
2878         }
2879     }
2880
2881     die "unable to apply firewall changes\n" if $errors;
2882
2883     update_nf_conntrack_max($hostfw_conf);
2884
2885     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2886
2887 }
2888
2889 sub update_nf_conntrack_max {
2890     my ($hostfw_conf) = @_;
2891
2892     my $max = 65536; # reasonable default
2893
2894     my $options = $hostfw_conf->{options} || {};
2895
2896     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2897         $max = $options->{nf_conntrack_max};
2898         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2899     }
2900
2901     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2902     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2903
2904     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2905
2906     if ($current != $max) {
2907         my $hashsize = int($max/4);
2908         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2909         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2910     }
2911 }
2912
2913 sub update_nf_conntrack_tcp_timeout_established {
2914     my ($hostfw_conf) = @_;
2915
2916     my $options = $hostfw_conf->{options} || {};
2917
2918     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2919
2920     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2921 }
2922
2923 sub remove_pvefw_chains {
2924
2925     my ($chash, $hooks) = iptables_get_chains();
2926     my $cmdlist = "*filter\n";
2927
2928     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2929         if ($hooks->{$h}) {
2930             $cmdlist .= "-D $h -j PVEFW-$h\n";
2931         }
2932     }
2933
2934     foreach my $chain (keys %$chash) {
2935         $cmdlist .= "-F $chain\n";
2936     }
2937
2938     foreach my $chain (keys %$chash) {
2939         $cmdlist .= "-X $chain\n";
2940     }
2941     $cmdlist .= "COMMIT\n";
2942
2943     iptables_restore_cmdlist($cmdlist);
2944 }
2945
2946 sub update {
2947     my ($verbose) = @_;
2948
2949     my $code = sub {
2950
2951         my $cluster_conf = load_clusterfw_conf();
2952         my $cluster_options = $cluster_conf->{options};
2953
2954         my $enable = $cluster_options->{enable};
2955
2956         die "Firewall is disabled - cannot start\n" if !$enable;
2957
2958         if (!$enable) {
2959             PVE::Firewall::remove_pvefw_chains();
2960             print "Firewall disabled\n" if $verbose;
2961             return;
2962         }
2963
2964         my $hostfw_conf = load_hostfw_conf();
2965
2966         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2967
2968         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2969     };
2970
2971     run_locked($code);
2972 }
2973
2974
2975 1;