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