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::JSONSchema qw(get_standard_option);
  10 use PVE::Cluster;
  11 use PVE::ProcFSTools;
  12 use PVE::Tools;
  13 use File::Basename;
  14 use File::Path;
  15 use IO::File;
  16 use Net::IP;
  17 use PVE::Tools qw(run_command lock_file);
  18 use Encode;
  19
  20 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  21 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  22
  23 # dynamically include PVE::QemuServer and PVE::OpenVZ
  24 # to avoid dependency problems
  25 my $have_qemu_server;
  26 eval {
  27     require PVE::QemuServer;
  28     $have_qemu_server = 1;
  29 };
  30
  31 my $have_pve_manager;
  32 eval {
  33     require PVE::OpenVZ;
  34     $have_pve_manager = 1;
  35 };
  36
  37 my $feature_ipset_nomatch = 0;
  38 eval  {
  39     my (undef, undef, $release) = POSIX::uname();
  40     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  41         my ($major, $minor) = ($1, $2);
  42         $feature_ipset_nomatch = 1 if ($major > 3) ||
  43             ($major == 3 && $minor >= 7);
  44     }
  45
  46 };
  47
  48 use Data::Dumper;
  49
  50 my $nodename = PVE::INotify::nodename();
  51
  52 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  53 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  54
  55 my $default_log_level = 'info';
  56
  57 my $log_level_hash = {
  58     debug => 7,
  59     info => 6,
  60     notice => 5,
  61     warning => 4,
  62     err => 3,
  63     crit => 2,
  64     alert => 1,
  65     emerg => 0,
  66 };
  67
  68 # imported/converted from: /usr/share/shorewall/macro.*
  69 my $pve_fw_macros = {
  70     'Amanda' => [
  71         { action => 'PARAM', proto => 'udp', dport => '10080' },
  72         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  73     ],
  74     'Auth' => [
  75         { action => 'PARAM', proto => 'tcp', dport => '113' },
  76     ],
  77     'BGP' => [
  78         { action => 'PARAM', proto => 'tcp', dport => '179' },
  79     ],
  80     'BitTorrent' => [
  81         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  82         { action => 'PARAM', proto => 'udp', dport => '6881' },
  83     ],
  84     'BitTorrent32' => [
  85         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
  86         { action => 'PARAM', proto => 'udp', dport => '6881' },
  87     ],
  88     'CVS' => [
  89         { action => 'PARAM', proto => 'tcp', dport => '2401' },
  90     ],
  91     'Citrix' => [
  92         { action => 'PARAM', proto => 'tcp', dport => '1494' },
  93         { action => 'PARAM', proto => 'udp', dport => '1604' },
  94         { action => 'PARAM', proto => 'tcp', dport => '2598' },
  95     ],
  96     'DAAP' => [
  97         { action => 'PARAM', proto => 'tcp', dport => '3689' },
  98         { action => 'PARAM', proto => 'udp', dport => '3689' },
  99     ],
 100     'DCC' => [
 101         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 102     ],
 103     'DHCPfwd' => [
 104         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 105         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 106     ],
 107     'DNS' => [
 108         { action => 'PARAM', proto => 'udp', dport => '53' },
 109         { action => 'PARAM', proto => 'tcp', dport => '53' },
 110     ],
 111     'Distcc' => [
 112         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 113     ],
 114     'Edonkey' => [
 115         { action => 'PARAM', proto => 'tcp', dport => '4662' },
 116         { action => 'PARAM', proto => 'udp', dport => '4665' },
 117     ],
 118     'FTP' => [
 119         { action => 'PARAM', proto => 'tcp', dport => '21' },
 120     ],
 121     'Finger' => [
 122         { action => 'PARAM', proto => 'tcp', dport => '79' },
 123     ],
 124     'GNUnet' => [
 125         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 126         { action => 'PARAM', proto => 'udp', dport => '2086' },
 127         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 128         { action => 'PARAM', proto => 'udp', dport => '1080' },
 129     ],
 130     'GRE' => [
 131         { action => 'PARAM', proto => '47' },
 132         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 133     ],
 134     'Git' => [
 135         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 136     ],
 137     'Gnutella' => [
 138         { action => 'PARAM', proto => 'tcp', dport => '6346' },
 139         { action => 'PARAM', proto => 'udp', dport => '6346' },
 140     ],
 141     'HKP' => [
 142         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 143     ],
 144     'HTTP' => [
 145         { action => 'PARAM', proto => 'tcp', dport => '80' },
 146     ],
 147     'HTTPS' => [
 148         { action => 'PARAM', proto => 'tcp', dport => '443' },
 149     ],
 150     'ICPV2' => [
 151         { action => 'PARAM', proto => 'udp', dport => '3130' },
 152     ],
 153     'ICQ' => [
 154         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 155     ],
 156     'IMAP' => [
 157         { action => 'PARAM', proto => 'tcp', dport => '143' },
 158     ],
 159     'IMAPS' => [
 160         { action => 'PARAM', proto => 'tcp', dport => '993' },
 161     ],
 162     'IPIP' => [
 163         { action => 'PARAM', proto => '94' },
 164         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 165     ],
 166     'IPP' => [
 167         { action => 'PARAM', proto => 'tcp', dport => '631' },
 168     ],
 169     'IPPbrd' => [
 170         { action => 'PARAM', proto => 'udp', dport => '631' },
 171     ],
 172     'IPPserver' => [
 173         { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
 174         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
 175     ],
 176     'IPsec' => [
 177         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 178         { action => 'PARAM', proto => '50' },
 179         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 180         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 181     ],
 182     'IPsecah' => [
 183         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 184         { action => 'PARAM', proto => '51' },
 185         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 186         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 187     ],
 188     'IPsecnat' => [
 189         { action => 'PARAM', proto => 'udp', dport => '500' },
 190         { action => 'PARAM', proto => 'udp', dport => '4500' },
 191         { action => 'PARAM', proto => '50' },
 192         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 193         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 194         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 195     ],
 196     'IRC' => [
 197         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 198     ],
 199     'JabberPlain' => [
 200         { action => 'PARAM', proto => 'tcp', dport => '5222' },
 201     ],
 202     'JabberSecure' => [
 203         { action => 'PARAM', proto => 'tcp', dport => '5223' },
 204     ],
 205     'Jabberd' => [
 206         { action => 'PARAM', proto => 'tcp', dport => '5269' },
 207     ],
 208     'Jetdirect' => [
 209         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 210     ],
 211     'L2TP' => [
 212         { action => 'PARAM', proto => 'udp', dport => '1701' },
 213         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 214     ],
 215     'LDAP' => [
 216         { action => 'PARAM', proto => 'tcp', dport => '389' },
 217     ],
 218     'LDAPS' => [
 219         { action => 'PARAM', proto => 'tcp', dport => '636' },
 220     ],
 221     'MSNP' => [
 222         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 223     ],
 224     'MSSQL' => [
 225         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 226     ],
 227     'Mail' => [
 228         { action => 'PARAM', proto => 'tcp', dport => '25' },
 229         { action => 'PARAM', proto => 'tcp', dport => '465' },
 230         { action => 'PARAM', proto => 'tcp', dport => '587' },
 231     ],
 232     'Munin' => [
 233         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 234     ],
 235     'MySQL' => [
 236         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 237     ],
 238     'NNTP' => [
 239         { action => 'PARAM', proto => 'tcp', dport => '119' },
 240     ],
 241     'NNTPS' => [
 242         { action => 'PARAM', proto => 'tcp', dport => '563' },
 243     ],
 244     'NTP' => [
 245         { action => 'PARAM', proto => 'udp', dport => '123' },
 246     ],
 247     'NTPbi' => [
 248         { action => 'PARAM', proto => 'udp', dport => '123' },
 249         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 250     ],
 251     'NTPbrd' => [
 252         { action => 'PARAM', proto => 'udp', dport => '123' },
 253         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
 254     ],
 255     'OSPF' => [
 256         { action => 'PARAM', proto => '89' },
 257     ],
 258     'OpenVPN' => [
 259         { action => 'PARAM', proto => 'udp', dport => '1194' },
 260     ],
 261     'PCA' => [
 262         { action => 'PARAM', proto => 'udp', dport => '5632' },
 263         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 264     ],
 265     'POP3' => [
 266         { action => 'PARAM', proto => 'tcp', dport => '110' },
 267     ],
 268     'POP3S' => [
 269         { action => 'PARAM', proto => 'tcp', dport => '995' },
 270     ],
 271     'PPtP' => [
 272         { action => 'PARAM', proto => '47' },
 273         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 274         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 275     ],
 276     'Ping' => [
 277         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 278     ],
 279     'PostgreSQL' => [
 280         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 281     ],
 282     'Printer' => [
 283         { action => 'PARAM', proto => 'tcp', dport => '515' },
 284     ],
 285     'RDP' => [
 286         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 287     ],
 288     'RIPbi' => [
 289         { action => 'PARAM', proto => 'udp', dport => '520' },
 290         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 291     ],
 292     'RNDC' => [
 293         { action => 'PARAM', proto => 'tcp', dport => '953' },
 294     ],
 295     'Razor' => [
 296         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 297     ],
 298     'Rdate' => [
 299         { action => 'PARAM', proto => 'tcp', dport => '37' },
 300     ],
 301     'Rsync' => [
 302         { action => 'PARAM', proto => 'tcp', dport => '873' },
 303     ],
 304     'SANE' => [
 305         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 306     ],
 307     'SMB' => [
 308         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 309         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 310         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 311         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 312     ],
 313     'SMBBI' => [
 314         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 315         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 316         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 317         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 318         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 319         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 320         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 321         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 322     ],
 323     'SMBswat' => [
 324         { action => 'PARAM', proto => 'tcp', dport => '901' },
 325     ],
 326     'SMTP' => [
 327         { action => 'PARAM', proto => 'tcp', dport => '25' },
 328     ],
 329     'SMTPS' => [
 330         { action => 'PARAM', proto => 'tcp', dport => '465' },
 331     ],
 332     'SNMP' => [
 333         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 334         { action => 'PARAM', proto => 'tcp', dport => '161' },
 335     ],
 336     'SPAMD' => [
 337         { action => 'PARAM', proto => 'tcp', dport => '783' },
 338     ],
 339     'SSH' => [
 340         { action => 'PARAM', proto => 'tcp', dport => '22' },
 341     ],
 342     'SVN' => [
 343         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 344     ],
 345     'SixXS' => [
 346         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 347         { action => 'PARAM', proto => 'udp', dport => '3740' },
 348         { action => 'PARAM', proto => '41' },
 349         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 350     ],
 351     'Squid' => [
 352         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 353     ],
 354     'Submission' => [
 355         { action => 'PARAM', proto => 'tcp', dport => '587' },
 356     ],
 357     'Syslog' => [
 358         { action => 'PARAM', proto => 'udp', dport => '514' },
 359         { action => 'PARAM', proto => 'tcp', dport => '514' },
 360     ],
 361     'TFTP' => [
 362         { action => 'PARAM', proto => 'udp', dport => '69' },
 363     ],
 364     'Telnet' => [
 365         { action => 'PARAM', proto => 'tcp', dport => '23' },
 366     ],
 367     'Telnets' => [
 368         { action => 'PARAM', proto => 'tcp', dport => '992' },
 369     ],
 370     'Time' => [
 371         { action => 'PARAM', proto => 'tcp', dport => '37' },
 372     ],
 373     'Trcrt' => [
 374         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 375         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 376     ],
 377     'VNC' => [
 378         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 379     ],
 380     'VNCL' => [
 381         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 382     ],
 383     'Web' => [
 384         { action => 'PARAM', proto => 'tcp', dport => '80' },
 385         { action => 'PARAM', proto => 'tcp', dport => '443' },
 386     ],
 387     'Webcache' => [
 388         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 389     ],
 390     'Webmin' => [
 391         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 392     ],
 393     'Whois' => [
 394         { action => 'PARAM', proto => 'tcp', dport => '43' },
 395     ],
 396 };
 397
 398 my $pve_fw_parsed_macros;
 399 my $pve_fw_preferred_macro_names = {};
 400
 401 my $pve_std_chains = {
 402     'PVEFW-SET-ACCEPT-MARK' => [
 403         "-j MARK --set-mark 1",
 404     ],
 405     'PVEFW-DropBroadcast' => [
 406         # same as shorewall 'Broadcast'
 407         # simply DROP BROADCAST/MULTICAST/ANYCAST
 408         # we can use this to reduce logging
 409         { action => 'DROP', dsttype => 'BROADCAST' },
 410         { action => 'DROP', dsttype => 'MULTICAST' },
 411         { action => 'DROP', dsttype => 'ANYCAST' },
 412         { action => 'DROP', dest => '224.0.0.0/4' },
 413     ],
 414     'PVEFW-reject' => [
 415         # same as shorewall 'reject'
 416         { action => 'DROP', dsttype => 'BROADCAST' },
 417         { action => 'DROP', source => '224.0.0.0/4' },
 418         { action => 'DROP', proto => 'icmp' },
 419         "-p tcp -j REJECT --reject-with tcp-reset",
 420         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 421         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 422         "-j REJECT --reject-with icmp-host-prohibited",
 423     ],
 424     'PVEFW-Drop' => [
 425         # same as shorewall 'Drop', which is equal to DROP,
 426         # but REJECT/DROP some packages to reduce logging,
 427         # and ACCEPT critical ICMP types
 428         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 429         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 430         { action => 'PVEFW-DropBroadcast' },
 431         # ACCEPT critical ICMP types
 432         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 433         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 434         # Drop packets with INVALID state
 435         "-m conntrack --ctstate INVALID -j DROP",
 436         # Drop Microsoft SMB noise
 437         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 438         { action => 'DROP', proto => 'udp', dport => '137:139'},
 439         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 440         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 441         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 442         # Drop new/NotSyn traffic so that it doesn't get logged
 443         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 444         # Drop DNS replies
 445         { action => 'DROP', proto => 'udp', sport => 53 },
 446     ],
 447     'PVEFW-Reject' => [
 448         # same as shorewall 'Reject', which is equal to Reject,
 449         # but REJECT/DROP some packages to reduce logging,
 450         # and ACCEPT critical ICMP types
 451         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 452         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 453         { action => 'PVEFW-DropBroadcast' },
 454         # ACCEPT critical ICMP types
 455         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 456         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 457         # Drop packets with INVALID state
 458         "-m conntrack --ctstate INVALID -j DROP",
 459         # Drop Microsoft SMB noise
 460         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 461         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 462         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 463         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 464         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 465         # Drop new/NotSyn traffic so that it doesn't get logged
 466         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 467         # Drop DNS replies
 468         { action => 'DROP', proto => 'udp', sport => 53 },
 469     ],
 470     'PVEFW-tcpflags' => [
 471         # same as shorewall tcpflags action.
 472         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 473         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 474         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 475         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 476         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 477         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 478     ],
 479     'PVEFW-smurfs' => [
 480         # same as shorewall smurfs action
 481         # Filter packets for smurfs (packets with a broadcast address as the source).
 482         "-s 0.0.0.0/32 -j RETURN",
 483         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 484         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 485     ],
 486 };
 487
 488 # iptables -p icmp -h
 489 my $icmp_type_names = {
 490     any => 1,
 491     'echo-reply' => 1,
 492     'destination-unreachable' => 1,
 493     'network-unreachable' => 1,
 494     'host-unreachable' => 1,
 495     'protocol-unreachable' => 1,
 496     'port-unreachable' => 1,
 497     'fragmentation-needed' => 1,
 498     'source-route-failed' => 1,
 499     'network-unknown' => 1,
 500     'host-unknown' => 1,
 501     'network-prohibited' => 1,
 502     'host-prohibited' => 1,
 503     'TOS-network-unreachable' => 1,
 504     'TOS-host-unreachable' => 1,
 505     'communication-prohibited' => 1,
 506     'host-precedence-violation' => 1,
 507     'precedence-cutoff' => 1,
 508     'source-quench' => 1,
 509     'redirect' => 1,
 510     'network-redirect' => 1,
 511     'host-redirect' => 1,
 512     'TOS-network-redirect' => 1,
 513     'TOS-host-redirect' => 1,
 514     'echo-request' => 1,
 515     'router-advertisement' => 1,
 516     'router-solicitation' => 1,
 517     'time-exceeded' => 1,
 518     'ttl-zero-during-transit' => 1,
 519     'ttl-zero-during-reassembly' => 1,
 520     'parameter-problem' => 1,
 521     'ip-header-bad' => 1,
 522     'required-option-missing' => 1,
 523     'timestamp-request' => 1,
 524     'timestamp-reply' => 1,
 525     'address-mask-request' => 1,
 526     'address-mask-reply' => 1,
 527 };
 528
 529 sub init_firewall_macros {
 530
 531     $pve_fw_parsed_macros = {};
 532
 533     foreach my $k (keys %$pve_fw_macros) {
 534         my $lc_name = lc($k);
 535         my $macro = $pve_fw_macros->{$k};
 536         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 537         $pve_fw_parsed_macros->{$k} = $macro;
 538     }
 539 }
 540
 541 init_firewall_macros();
 542
 543 my $etc_services;
 544
 545 sub get_etc_services {
 546
 547     return $etc_services if $etc_services;
 548
 549     my $filename = "/etc/services";
 550
 551     my $fh = IO::File->new($filename, O_RDONLY);
 552     if (!$fh) {
 553         warn "unable to read '$filename' - $!\n";
 554         return {};
 555     }
 556
 557     my $services = {};
 558
 559     while (my $line = <$fh>) {
 560         chomp ($line);
 561         next if $line =~m/^#/;
 562         next if ($line =~m/^\s*$/);
 563
 564         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 565             $services->{byid}->{$2}->{name} = $1;
 566             $services->{byid}->{$2}->{port} = $2;
 567             $services->{byid}->{$2}->{$3} = 1;
 568             $services->{byname}->{$1} = $services->{byid}->{$2};
 569         }
 570     }
 571
 572     close($fh);
 573
 574     $etc_services = $services;
 575
 576
 577     return $etc_services;
 578 }
 579
 580 my $etc_protocols;
 581
 582 sub get_etc_protocols {
 583     return $etc_protocols if $etc_protocols;
 584
 585     my $filename = "/etc/protocols";
 586
 587     my $fh = IO::File->new($filename, O_RDONLY);
 588     if (!$fh) {
 589         warn "unable to read '$filename' - $!\n";
 590         return {};
 591     }
 592
 593     my $protocols = {};
 594
 595     while (my $line = <$fh>) {
 596         chomp ($line);
 597         next if $line =~m/^#/;
 598         next if ($line =~m/^\s*$/);
 599
 600         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 601             $protocols->{byid}->{$2}->{name} = $1;
 602             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 603         }
 604     }
 605
 606     close($fh);
 607
 608     $etc_protocols = $protocols;
 609
 610     return $etc_protocols;
 611 }
 612
 613 sub parse_address_list {
 614     my ($str) = @_;
 615
 616     return if $str !~ m/^(\+)(\S+)$/; # ipset ref
 617
 618     my $count = 0;
 619     my $iprange = 0;
 620     foreach my $elem (split(/,/, $str)) {
 621         $count++;
 622         if (!Net::IP->new($elem)) {
 623             my $err = Net::IP::Error();
 624             die "invalid IP address: $err\n";
 625         }
 626         $iprange = 1 if $elem =~ m/-/;
 627     }
 628
 629     die "you can use a range in a list\n" if $iprange && $count > 1;
 630 }
 631
 632 sub parse_port_name_number_or_range {
 633     my ($str) = @_;
 634
 635     my $services = PVE::Firewall::get_etc_services();
 636     my $nbports = 0;
 637     foreach my $item (split(/,/, $str)) {
 638         my $portlist = "";
 639         my $oldpon = undef;
 640         $nbports++;
 641         foreach my $pon (split(':', $item, 2)) {
 642             $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
 643             if ($pon =~ m/^\d+$/){
 644                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
 645                 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
 646                 $oldpon = $pon;
 647             }else{
 648                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 649             }
 650         }
 651     }
 652
 653     return ($nbports);
 654 }
 655
 656 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 657 sub pve_fw_verify_port_spec {
 658    my ($portstr) = @_;
 659
 660     parse_port_name_number_or_range($portstr);
 661
 662    return $portstr;
 663 }
 664
 665 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 666 sub pve_fw_verify_v4addr_spec {
 667    my ($list) = @_;
 668
 669    parse_address_list($list);
 670
 671    return $list;
 672 }
 673
 674 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 675 sub pve_fw_verify_protocol_spec {
 676    my ($proto) = @_;
 677
 678    my $protocols = get_etc_protocols();
 679
 680    die "unknown protocol '$proto'\n" if $proto &&
 681        !(defined($protocols->{byname}->{$proto}) ||
 682          defined($protocols->{byid}->{$proto}));
 683
 684    return $proto;
 685 }
 686
 687
 688 # helper function for API
 689
 690 my $rule_properties = {
 691     pos => {
 692         description => "Update rule at position <pos>.",
 693         type => 'integer',
 694         minimum => 0,
 695         optional => 1,
 696     },
 697     digest => {
 698         type => 'string',
 699         optional => 1,
 700         maxLength => 27,
 701         minLength => 27,
 702     },
 703     type => {
 704         type => 'string',
 705         optional => 1,
 706         enum => ['in', 'out', 'group'],
 707     },
 708     action => {
 709         type => 'string',
 710         optional => 1,
 711         enum => ['ACCEPT', 'DROP', 'REJECT'],
 712     },
 713     macro => {
 714         type => 'string',
 715         optional => 1,
 716         maxLength => 128,
 717     },
 718     iface => get_standard_option('pve-iface', { optional => 1 }),
 719     source => {
 720         type => 'string', format => 'pve-fw-v4addr-spec',
 721         optional => 1,
 722     },
 723     dest => {
 724         type => 'string', format => 'pve-fw-v4addr-spec',
 725         optional => 1,
 726     },
 727     proto => {
 728         type => 'string', format => 'pve-fw-protocol-spec',
 729         optional => 1,
 730     },
 731     enable => {
 732         type => 'boolean',
 733         optional => 1,
 734     },
 735     sport => {
 736         type => 'string', format => 'pve-fw-port-spec',
 737         optional => 1,
 738     },
 739     dport => {
 740         type => 'string', format => 'pve-fw-port-spec',
 741         optional => 1,
 742     },
 743     comment => {
 744         type => 'string',
 745         optional => 1,
 746     },
 747 };
 748
 749 sub cleanup_fw_rule {
 750     my ($rule, $digest, $pos) = @_;
 751
 752     my $r = {};
 753
 754     foreach my $k (keys %$rule) {
 755         next if !$rule_properties->{$k};
 756         my $v = $rule->{$k};
 757         next if !defined($v);
 758         $r->{$k} = $v;
 759         $r->{digest} = $digest;
 760         $r->{pos} = $pos;
 761     }
 762
 763     return $r;
 764 }
 765
 766 sub add_rule_properties {
 767     my ($properties) = @_;
 768
 769     foreach my $k (keys %$rule_properties) {
 770         $properties->{$k} = $rule_properties->{$k};
 771     }
 772
 773     return $properties;
 774 }
 775
 776 sub copy_rule_data {
 777     my ($rule, $param) = @_;
 778
 779     foreach my $k (keys %$rule_properties) {
 780         if (defined(my $v = $param->{$k})) {
 781             if ($v eq '' || $v eq '-') {
 782                 delete $rule->{$k};
 783             } else {
 784                 $rule->{$k} = $v;
 785             }
 786         } else {
 787             delete $rule->{$k};
 788         }
 789     }
 790     return $rule;
 791 }
 792
 793 # core functions
 794 my $bridge_firewall_enabled = 0;
 795
 796 sub enable_bridge_firewall {
 797
 798     return if $bridge_firewall_enabled; # only once
 799
 800     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
 801     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
 802
 803     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
 804     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
 805
 806     $bridge_firewall_enabled = 1;
 807 }
 808
 809 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 810
 811 sub iptables_restore_cmdlist {
 812     my ($cmdlist) = @_;
 813
 814     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 815 }
 816
 817 sub ipset_restore_cmdlist {
 818     my ($cmdlist) = @_;
 819
 820     run_command("/usr/sbin/ipset restore", input => $cmdlist);
 821 }
 822
 823 sub iptables_get_chains {
 824
 825     my $res = {};
 826
 827     # check what chains we want to track
 828     my $is_pvefw_chain = sub {
 829         my $name = shift;
 830
 831         return 1 if $name =~ m/^PVEFW-\S+$/;
 832
 833         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 834
 835         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
 836
 837         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
 838
 839         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
 840         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 841
 842         return undef;
 843     };
 844
 845     my $table = '';
 846
 847     my $hooks = {};
 848
 849     my $parser = sub {
 850         my $line = shift;
 851
 852         return if $line =~ m/^#/;
 853         return if $line =~ m/^\s*$/;
 854
 855         if ($line =~ m/^\*(\S+)$/) {
 856             $table = $1;
 857             return;
 858         }
 859
 860         return if $table ne 'filter';
 861
 862         if ($line =~ m/^:(\S+)\s/) {
 863             my $chain = $1;
 864             return if !&$is_pvefw_chain($chain);
 865             $res->{$chain} = "unknown";
 866         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 867             my ($chain, $sig) = ($1, $2);
 868             return if !&$is_pvefw_chain($chain);
 869             $res->{$chain} = $sig;
 870         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
 871             $hooks->{$1} = 1;
 872         } else {
 873             # simply ignore the rest
 874             return;
 875         }
 876     };
 877
 878     run_command("/sbin/iptables-save", outfunc => $parser);
 879
 880     return wantarray ? ($res, $hooks) : $res;
 881 }
 882
 883 sub iptables_chain_digest {
 884     my ($rules) = @_;
 885     my $digest = Digest::SHA->new('sha1');
 886     foreach my $rule (@$rules) { # order is important
 887         $digest->add($rule);
 888     }
 889     return $digest->b64digest;
 890 }
 891
 892 sub ipset_chain_digest {
 893     my ($rules) = @_;
 894
 895     my $digest = Digest::SHA->new('sha1');
 896     foreach my $rule (sort @$rules) { # note: sorted
 897         $digest->add($rule);
 898     }
 899     return $digest->b64digest;
 900 }
 901
 902 sub ipset_get_chains {
 903
 904     my $res = {};
 905     my $chains = {};
 906
 907     my $parser = sub {
 908         my $line = shift;
 909
 910         return if $line =~ m/^#/;
 911         return if $line =~ m/^\s*$/;
 912         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
 913             my $chain = $1;
 914             $line =~ s/\s+$//; # delete trailing white space
 915             push @{$chains->{$chain}}, $line;
 916         } else {
 917             # simply ignore the rest
 918             return;
 919         }
 920     };
 921
 922     run_command("/usr/sbin/ipset save", outfunc => $parser);
 923
 924     # compute digest for each chain
 925     foreach my $chain (keys %$chains) {
 926         $res->{$chain} = ipset_chain_digest($chains->{$chain});
 927     }
 928
 929     return $res;
 930 }
 931
 932 sub ruleset_generate_cmdstr {
 933     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
 934
 935     return if defined($rule->{enable}) && !$rule->{enable};
 936
 937     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
 938
 939     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
 940     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
 941
 942     my @cmd = ();
 943
 944     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
 945     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
 946
 947     my $source = $rule->{source};
 948     my $dest = $rule->{dest};
 949
 950     if ($source) {
 951         if ($source =~ m/^(\+)(\S+)$/) {
 952             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
 953             push @cmd, "-m set --match-set PVEFW-$2 src";
 954
 955         } elsif ($source =~ m/\-/){
 956             push @cmd, "-m iprange --src-range $source";
 957
 958         } else {
 959             push @cmd, "-s $source";
 960         }
 961     }
 962
 963     if ($dest) {
 964         if ($dest =~ m/^(\+)(\S+)$/) {
 965             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
 966             push @cmd, "-m set --match-set PVEFW-$2 dst";
 967
 968         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
 969             push @cmd, "-m iprange --dst-range $dest";
 970
 971         } else {
 972             push @cmd, "-s $dest";
 973         }
 974     }
 975
 976     if ($rule->{proto}) {
 977         push @cmd, "-p $rule->{proto}";
 978
 979         my $multiport = 0;
 980         $multiport++ if $nbdport > 1;
 981         $multiport++ if $nbsport > 1;
 982
 983         push @cmd, "--match multiport" if $multiport;
 984
 985         die "multiport: option '--sports' cannot be used together with '--dports'\n"
 986             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
 987
 988         if ($rule->{dport}) {
 989             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
 990                 # Note: we use dport to store --icmp-type
 991                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
 992                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
 993             } else {
 994                 if ($nbdport > 1) {
 995                     if ($multiport == 2) {
 996                         push @cmd,  "--ports $rule->{dport}";
 997                     } else {
 998                         push @cmd, "--dports $rule->{dport}";
 999                     }
1000                 } else {
1001                     push @cmd, "--dport $rule->{dport}";
1002                 }
1003             }
1004         }
1005
1006         if ($rule->{sport}) {
1007             if ($nbsport > 1) {
1008                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1009             } else {
1010                 push @cmd, "--sport $rule->{sport}";
1011             }
1012         }
1013     } elsif ($rule->{dport} || $rule->{sport}) {
1014         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1015         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1016     }
1017
1018     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1019
1020     if (my $action = $rule->{action}) {
1021         $action = $actions->{$action} if defined($actions->{$action});
1022         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1023         push @cmd, $goto ? "-g $action" : "-j $action";
1024     }
1025
1026     return scalar(@cmd) ? join(' ', @cmd) : undef;
1027 }
1028
1029 my $apply_macro = sub {
1030     my ($macro_name, $param) = @_;
1031
1032     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1033     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1034
1035     my $rules = [];
1036
1037     foreach my $templ (@$macro_rules) {
1038         my $rule = {};
1039         my $param_used = {};
1040         foreach my $k (keys %$templ) {
1041             my $v = $templ->{$k};
1042             if ($v eq 'PARAM') {
1043                 $v = $param->{$k};
1044                 $param_used->{$k} = 1;
1045             } elsif ($v eq 'DEST') {
1046                 $v = $param->{dest};
1047                 $param_used->{dest} = 1;
1048             } elsif ($v eq 'SOURCE') {
1049                 $v = $param->{source};
1050                 $param_used->{source} = 1;
1051             }
1052
1053             die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1054             $rule->{$k} = $v;
1055         }
1056         foreach my $k (keys %$param) {
1057             next if $k eq 'macro';
1058             next if !defined($param->{$k});
1059             next if $param_used->{$k};
1060             if (defined($rule->{$k})) {
1061                 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1062                     if $rule->{$k} ne $param->{$k};
1063             } else {
1064                 $rule->{$k} = $param->{$k};
1065             }
1066         }
1067         push @$rules, $rule;
1068     }
1069
1070     return $rules;
1071 };
1072
1073 sub ruleset_generate_rule {
1074     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1075
1076     my $rules;
1077
1078     if ($rule->{macro}) {
1079         $rules = &$apply_macro($rule->{macro}, $rule);
1080     } else {
1081         $rules = [ $rule ];
1082     }
1083
1084     foreach my $tmp (@$rules) {
1085         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1086             ruleset_addrule($ruleset, $chain, $cmdstr);
1087         }
1088     }
1089 }
1090
1091 sub ruleset_generate_rule_insert {
1092     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1093
1094     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1095
1096     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1097         ruleset_insertrule($ruleset, $chain, $cmdstr);
1098     }
1099 }
1100
1101 sub ruleset_create_chain {
1102     my ($ruleset, $chain) = @_;
1103
1104     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1105     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1106
1107     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1108
1109     $ruleset->{$chain} = [];
1110 }
1111
1112 sub ruleset_chain_exist {
1113     my ($ruleset, $chain) = @_;
1114
1115     return $ruleset->{$chain} ? 1 : undef;
1116 }
1117
1118 sub ruleset_addrule {
1119    my ($ruleset, $chain, $rule) = @_;
1120
1121    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1122
1123    push @{$ruleset->{$chain}}, "-A $chain $rule";
1124 }
1125
1126 sub ruleset_insertrule {
1127    my ($ruleset, $chain, $rule) = @_;
1128
1129    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1130
1131    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1132 }
1133
1134 sub get_log_rule_base {
1135     my ($chain, $vmid, $msg, $loglevel) = @_;
1136
1137     die "internal error - no log level" if !defined($loglevel);
1138
1139     $vmid = 0 if !defined($vmid);
1140
1141     # Note: we use special format for prefix to pass further
1142     # info to log daemon (VMID, LOGVELEL and CHAIN)
1143
1144     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1145 }
1146
1147 sub ruleset_addlog {
1148     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1149
1150     return if !defined($loglevel);
1151
1152     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1153
1154     $logrule = "$rule $logrule" if defined($rule);
1155
1156     ruleset_addrule($ruleset, $chain, $logrule)
1157 }
1158
1159 sub generate_bridge_chains {
1160     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1161
1162     my $options = $hostfw_conf->{options} || {};
1163
1164     die "error: detected direct route to bridge '$bridge'\n"
1165         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1166
1167     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1168         ruleset_create_chain($ruleset, "$bridge-FW");
1169         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1170         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1171     }
1172
1173     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1174         ruleset_create_chain($ruleset, "$bridge-OUT");
1175         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1176         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1177     }
1178
1179     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1180         ruleset_create_chain($ruleset, "$bridge-IN");
1181         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1182         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1183         # accept traffic to unmanaged bridge ports
1184         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1185     }
1186 }
1187
1188 sub ruleset_add_chain_policy {
1189     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1190
1191     if ($policy eq 'ACCEPT') {
1192
1193         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1194                               { ACCEPT =>  $accept_action});
1195
1196     } elsif ($policy eq 'DROP') {
1197
1198         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1199
1200         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1201
1202         ruleset_addrule($ruleset, $chain, "-j DROP");
1203     } elsif ($policy eq 'REJECT') {
1204         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1205
1206         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1207
1208         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1209     } else {
1210         # should not happen
1211         die "internal error: unknown policy '$policy'";
1212     }
1213 }
1214
1215 sub ruleset_create_vm_chain {
1216     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1217
1218     ruleset_create_chain($ruleset, $chain);
1219     my $accept = generate_nfqueue($options);
1220
1221     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1222         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1223     }
1224
1225     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1226         if ($direction eq 'OUT') {
1227             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1228                                                       proto => 'udp', sport => 68, dport => 67 });
1229         } else {
1230             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1231                                                       proto => 'udp', sport => 67, dport => 68 });
1232         }
1233     }
1234
1235     if ($options->{tcpflags}) {
1236         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1237     }
1238
1239     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1240     if ($direction eq 'OUT') {
1241         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1242     } else {
1243         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1244     }
1245
1246     if ($direction eq 'OUT') {
1247         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1248             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1249         }
1250         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1251     }
1252 }
1253
1254 sub ruleset_generate_vm_rules {
1255     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1256
1257     my $lc_direction = lc($direction);
1258
1259     foreach my $rule (@$rules) {
1260         next if $rule->{iface} && $rule->{iface} ne $netid;
1261         next if !$rule->{enable};
1262         if ($rule->{type} eq 'group') {
1263             my $group_chain = "GROUP-$rule->{action}-$direction";
1264             if(!ruleset_chain_exist($ruleset, $group_chain)){
1265                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1266             }
1267             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1268             if ($direction eq 'OUT'){
1269                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1270             }else{
1271                 my $accept = generate_nfqueue($options);
1272                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1273             }
1274
1275         } else {
1276             next if $rule->{type} ne $lc_direction;
1277             if ($direction eq 'OUT') {
1278                 ruleset_generate_rule($ruleset, $chain, $rule,
1279                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1280             } else {
1281                 my $accept = generate_nfqueue($options);
1282                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1283             }
1284         }
1285     }
1286 }
1287
1288 sub generate_nfqueue {
1289     my ($options) = @_;
1290
1291     my $action = "";
1292     if($options->{ips}){
1293         $action = "NFQUEUE";
1294         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1295             if(defined($3) && defined($1)) {
1296                 $action .= " --queue-balance $1:$3";
1297             }elsif (defined($1)) {
1298                 $action .= " --queue-num $1";
1299             }
1300         }
1301         $action .= " --queue-bypass";
1302     }else{
1303         $action = "ACCEPT";
1304     }
1305
1306     return $action;
1307 }
1308
1309 sub ruleset_generate_vm_ipsrules {
1310     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1311
1312     if ($options->{ips} && $direction eq 'IN') {
1313         my $nfqueue = generate_nfqueue($options);
1314
1315         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1316             ruleset_create_chain($ruleset, "PVEFW-IPS");
1317         }
1318
1319         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1320             ruleset_create_chain($ruleset, "$bridge-IPS");
1321             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1322         }
1323
1324         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1325     }
1326 }
1327
1328 sub generate_venet_rules_direction {
1329     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1330
1331     parse_address_list($ip); # make sure we have a valid $ip list
1332
1333     my $lc_direction = lc($direction);
1334
1335     my $rules = $vmfw_conf->{rules};
1336
1337     my $options = $vmfw_conf->{options};
1338     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1339
1340     my $chain = "venet0-$vmid-$direction";
1341
1342     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1343
1344     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1345
1346     # implement policy
1347     my $policy;
1348
1349     if ($direction eq 'OUT') {
1350         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1351     } else {
1352         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1353     }
1354
1355     my $accept = generate_nfqueue($options);
1356     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1357     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1358
1359     # plug into FORWARD, INPUT and OUTPUT chain
1360     if ($direction eq 'OUT') {
1361         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1362             action => $chain,
1363             source => $ip,
1364             iface_in => 'venet0'});
1365
1366         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1367             action => $chain,
1368             source => $ip,
1369             iface_in => 'venet0'});
1370     } else {
1371         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1372             action => $chain,
1373             dest => $ip,
1374             iface_out => 'venet0'});
1375
1376         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1377             action => $chain,
1378             dest => $ip,
1379             iface_out => 'venet0'});
1380     }
1381 }
1382
1383 sub generate_tap_rules_direction {
1384     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1385
1386     my $lc_direction = lc($direction);
1387
1388     my $rules = $vmfw_conf->{rules};
1389
1390     my $options = $vmfw_conf->{options};
1391     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1392
1393     my $tapchain = "$iface-$direction";
1394
1395     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1396
1397     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1398
1399     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1400
1401     # implement policy
1402     my $policy;
1403
1404     if ($direction eq 'OUT') {
1405         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1406     } else {
1407         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1408     }
1409
1410     my $accept = generate_nfqueue($options);
1411     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1412     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1413
1414     # plug the tap chain to bridge chain
1415     if ($direction eq 'IN') {
1416         ruleset_insertrule($ruleset, "$bridge-IN",
1417                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1418     } else {
1419         ruleset_insertrule($ruleset, "$bridge-OUT",
1420                            "-m physdev --physdev-in $iface -j $tapchain");
1421     }
1422 }
1423
1424 sub enable_host_firewall {
1425     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1426
1427     # fixme: allow security groups
1428
1429     my $options = $hostfw_conf->{options};
1430     my $rules = $hostfw_conf->{rules};
1431
1432     # host inbound firewall
1433     my $chain = "PVEFW-HOST-IN";
1434     ruleset_create_chain($ruleset, $chain);
1435
1436     my $loglevel = get_option_log_level($options, "log_level_in");
1437
1438     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1439         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1440     }
1441
1442     if ($options->{tcpflags}) {
1443         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1444     }
1445
1446     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1447     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1448     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1449     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1450     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1451     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1452
1453     # we use RETURN because we need to check also tap rules
1454     my $accept_action = 'RETURN';
1455
1456     foreach my $rule (@$rules) {
1457         next if $rule->{type} ne 'in';
1458         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1459     }
1460
1461     # implement input policy
1462     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1463     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1464
1465     # host outbound firewall
1466     $chain = "PVEFW-HOST-OUT";
1467     ruleset_create_chain($ruleset, $chain);
1468
1469     $loglevel = get_option_log_level($options, "log_level_out");
1470
1471     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1472     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1473     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1474     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1475     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1476     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1477
1478     # we use RETURN because we may want to check other thigs later
1479     $accept_action = 'RETURN';
1480
1481     foreach my $rule (@$rules) {
1482         next if $rule->{type} ne 'out';
1483         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1484     }
1485
1486     # implement output policy
1487     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1488     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1489
1490     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1491     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1492 }
1493
1494 sub generate_group_rules {
1495     my ($ruleset, $cluster_conf, $group) = @_;
1496     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1497
1498     my $rules = $cluster_conf->{groups}->{$group};
1499
1500     my $chain = "GROUP-${group}-IN";
1501
1502     ruleset_create_chain($ruleset, $chain);
1503     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1504
1505     foreach my $rule (@$rules) {
1506         next if $rule->{type} ne 'in';
1507         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1508     }
1509
1510     $chain = "GROUP-${group}-OUT";
1511
1512     ruleset_create_chain($ruleset, $chain);
1513     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1514
1515     foreach my $rule (@$rules) {
1516         next if $rule->{type} ne 'out';
1517         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1518         # check also other tap rules later
1519         ruleset_generate_rule($ruleset, $chain, $rule,
1520                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1521     }
1522 }
1523
1524 my $MAX_NETS = 32;
1525 my $valid_netdev_names = {};
1526 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1527     $valid_netdev_names->{"net$i"} = 1;
1528 }
1529
1530 sub parse_fw_rule {
1531     my ($line, $need_iface, $allow_groups) = @_;
1532
1533     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1534
1535     # we can add single line comments to the end of the rule
1536     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1537
1538     # we can disable a rule when prefixed with '|'
1539     my $enable = 1;
1540
1541     $enable = 0 if $line =~ s/^\|//;
1542
1543     my @data = split(/\s+/, $line);
1544     my $expected_elements = $need_iface ? 8 : 7;
1545
1546     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1547
1548     if ($need_iface) {
1549         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1550     } else {
1551         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1552     }
1553
1554     die "incomplete rule\n" if ! ($type && $action);
1555
1556     my $macro;
1557
1558     $type = lc($type);
1559
1560     if ($type eq  'in' || $type eq 'out') {
1561         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1562             # OK
1563         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1564             $action = $2;
1565             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1566             die "unknown macro '$1'\n" if !$preferred_name;
1567             $macro = $preferred_name;
1568         } else {
1569             die "unknown action '$action'\n";
1570         }
1571     } elsif ($type eq 'group') {
1572         die "wrong number of rule elements\n" if scalar(@data) != 3;
1573         die "groups disabled\n" if !$allow_groups;
1574
1575         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1576     } else {
1577         die "unknown rule type '$type'\n";
1578     }
1579
1580     if ($need_iface) {
1581         $iface = undef if $iface && $iface eq '-';
1582     }
1583
1584     $proto = undef if $proto && $proto eq '-';
1585     pve_fw_verify_protocol_spec($proto) if $proto;
1586
1587     $source = undef if $source && $source eq '-';
1588     $dest = undef if $dest && $dest eq '-';
1589
1590     $dport = undef if $dport && $dport eq '-';
1591     $sport = undef if $sport && $sport eq '-';
1592
1593     parse_port_name_number_or_range($dport) if defined($dport);
1594     parse_port_name_number_or_range($sport) if defined($sport);
1595
1596     parse_address_list($source) if $source;
1597     parse_address_list($dest) if $dest;
1598
1599     return {
1600         type => $type,
1601         enable => $enable,
1602         comment => $comment,
1603         action => $action,
1604         macro => $macro,
1605         iface => $iface,
1606         source => $source,
1607         dest => $dest,
1608         proto => $proto,
1609         dport => $dport,
1610         sport => $sport,
1611     };
1612 }
1613
1614 sub parse_vmfw_option {
1615     my ($line) = @_;
1616
1617     my ($opt, $value);
1618
1619     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1620
1621     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1622         $opt = lc($1);
1623         $value = int($2);
1624     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1625         $opt = lc($1);
1626         $value = $2 ? lc($3) : '';
1627     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1628         $opt = lc($1);
1629         $value = uc($3);
1630     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1631         $opt = lc($1);
1632         $value = $2;
1633     } else {
1634         chomp $line;
1635         die "can't parse option '$line'\n"
1636     }
1637
1638     return ($opt, $value);
1639 }
1640
1641 sub parse_hostfw_option {
1642     my ($line) = @_;
1643
1644     my ($opt, $value);
1645
1646     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1647
1648     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1649         $opt = lc($1);
1650         $value = int($2);
1651     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1652         $opt = lc($1);
1653         $value = $2 ? lc($3) : '';
1654     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1655         $opt = lc($1);
1656         $value = uc($3);
1657     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1658         $opt = lc($1);
1659         $value = int($2);
1660     } else {
1661         chomp $line;
1662         die "can't parse option '$line'\n"
1663     }
1664
1665     return ($opt, $value);
1666 }
1667
1668 sub parse_clusterfw_option {
1669     my ($line) = @_;
1670
1671     my ($opt, $value);
1672
1673     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1674         $opt = lc($1);
1675         $value = int($2);
1676     } else {
1677         chomp $line;
1678         die "can't parse option '$line'\n"
1679     }
1680
1681     return ($opt, $value);
1682 }
1683
1684 sub parse_vm_fw_rules {
1685     my ($filename, $fh) = @_;
1686
1687     my $res = { rules => [], options => {}};
1688
1689     my $section;
1690
1691     my $digest = Digest::SHA->new('sha1');
1692
1693     while (defined(my $line = <$fh>)) {
1694         $digest->add($line);
1695
1696         next if $line =~ m/^#/;
1697         next if $line =~ m/^\s*$/;
1698
1699         my $linenr = $fh->input_line_number();
1700         my $prefix = "$filename (line $linenr)";
1701
1702         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1703             $section = lc($1);
1704             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1705             next;
1706         }
1707         if (!$section) {
1708             warn "$prefix: skip line - no section";
1709             next;
1710         }
1711
1712         next if !$res->{$section}; # skip undefined section
1713
1714         if ($section eq 'options') {
1715             eval {
1716                 my ($opt, $value) = parse_vmfw_option($line);
1717                 $res->{options}->{$opt} = $value;
1718             };
1719             warn "$prefix: $@" if $@;
1720             next;
1721         }
1722
1723         my $rule;
1724         eval { $rule = parse_fw_rule($line, 1, 1); };
1725         if (my $err = $@) {
1726             warn "$prefix: $err";
1727             next;
1728         }
1729
1730         push @{$res->{$section}}, $rule;
1731     }
1732
1733     $res->{digest} = $digest->b64digest;
1734
1735     return $res;
1736 }
1737
1738 sub parse_host_fw_rules {
1739     my ($filename, $fh) = @_;
1740
1741     my $res = { rules => [], options => {}};
1742
1743     my $section;
1744
1745     my $digest = Digest::SHA->new('sha1');
1746
1747     while (defined(my $line = <$fh>)) {
1748         $digest->add($line);
1749
1750         next if $line =~ m/^#/;
1751         next if $line =~ m/^\s*$/;
1752
1753         my $linenr = $fh->input_line_number();
1754         my $prefix = "$filename (line $linenr)";
1755
1756         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1757             $section = lc($1);
1758             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1759             next;
1760         }
1761         if (!$section) {
1762             warn "$prefix: skip line - no section";
1763             next;
1764         }
1765
1766         next if !$res->{$section}; # skip undefined section
1767
1768         if ($section eq 'options') {
1769             eval {
1770                 my ($opt, $value) = parse_hostfw_option($line);
1771                 $res->{options}->{$opt} = $value;
1772             };
1773             warn "$prefix: $@" if $@;
1774             next;
1775         }
1776
1777         my $rule;
1778         eval { $rule = parse_fw_rule($line, 1, 1); };
1779         if (my $err = $@) {
1780             warn "$prefix: $err";
1781             next;
1782         }
1783
1784         push @{$res->{$section}}, $rule;
1785     }
1786
1787 $res->{digest} = $digest->b64digest;
1788
1789     return $res;
1790 }
1791
1792 sub parse_cluster_fw_rules {
1793     my ($filename, $fh) = @_;
1794
1795     my $section;
1796     my $group;
1797
1798     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1799
1800     my $digest = Digest::SHA->new('sha1');
1801
1802     while (defined(my $line = <$fh>)) {
1803         $digest->add($line);
1804
1805         next if $line =~ m/^#/;
1806         next if $line =~ m/^\s*$/;
1807
1808         my $linenr = $fh->input_line_number();
1809         my $prefix = "$filename (line $linenr)";
1810
1811         if ($line =~ m/^\[options\]$/i) {
1812             $section = 'options';
1813             next;
1814         }
1815
1816         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1817             $section = 'groups';
1818             $group = lc($1);
1819             next;
1820         }
1821
1822         if ($line =~ m/^\[rules\]$/i) {
1823             $section = 'rules';
1824             next;
1825         }
1826
1827         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1828             $section = 'ipset';
1829             $group = lc($1);
1830             next;
1831         }
1832
1833         if (!$section) {
1834             warn "$prefix: skip line - no section\n";
1835             next;
1836         }
1837
1838         if ($section eq 'options') {
1839             eval {
1840                 my ($opt, $value) = parse_clusterfw_option($line);
1841                 $res->{options}->{$opt} = $value;
1842             };
1843             warn "$prefix: $@" if $@;
1844         } elsif ($section eq 'rules') {
1845             my $rule;
1846             eval { $rule = parse_fw_rule($line, 1, 1); };
1847             if (my $err = $@) {
1848                 warn "$prefix: $err";
1849                 next;
1850             }
1851             push @{$res->{$section}}, $rule;
1852         } elsif ($section eq 'groups') {
1853             my $rule;
1854             eval { $rule = parse_fw_rule($line, 0, 0); };
1855             if (my $err = $@) {
1856                 warn "$prefix: $err";
1857                 next;
1858             }
1859             push @{$res->{$section}->{$group}}, $rule;
1860         } elsif ($section eq 'ipset') {
1861             chomp $line;
1862             $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1863             my $nomatch = $1;
1864         my $ip = $2;
1865
1866             if(!$ip){
1867                 warn "$prefix: $line is not an valid ip address\n";
1868                 next;
1869             }
1870             if (!Net::IP->new($ip)) {
1871                 warn "$prefix: $line is not an valid ip address\n";
1872                 next;
1873             }
1874
1875             if ($nomatch) {
1876                 if ($feature_ipset_nomatch) {
1877                     push @{$res->{$section}->{$group}}, "$ip nomatch";
1878                 } else {
1879                     warn "$prefix: ignore $line - nomatch not supported by kernel\n";
1880                 }
1881             } else {
1882                 push @{$res->{$section}->{$group}}, $ip;
1883             }
1884         }
1885     }
1886
1887     $res->{digest} = $digest->b64digest;
1888     return $res;
1889 }
1890
1891 sub run_locked {
1892     my ($code, @param) = @_;
1893
1894     my $timeout = 10;
1895
1896     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1897
1898     die $@ if $@;
1899
1900     return $res;
1901 }
1902
1903 sub read_local_vm_config {
1904
1905     my $openvz = {};
1906     my $qemu = {};
1907
1908     my $vmdata = { openvz => $openvz, qemu => $qemu };
1909
1910     my $vmlist = PVE::Cluster::get_vmlist();
1911     return $vmdata if !$vmlist || !$vmlist->{ids};
1912     my $ids = $vmlist->{ids};
1913
1914     foreach my $vmid (keys %$ids) {
1915         next if !$vmid; # skip VE0
1916         my $d = $ids->{$vmid};
1917         next if !$d->{node} || $d->{node} ne $nodename;
1918         next if !$d->{type};
1919         if ($d->{type} eq 'openvz') {
1920             if ($have_pve_manager) {
1921                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1922                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1923                     $openvz->{$vmid} = $conf;
1924                 }
1925             }
1926         } elsif ($d->{type} eq 'qemu') {
1927             if ($have_qemu_server) {
1928                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1929                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1930                     $qemu->{$vmid} = $conf;
1931                 }
1932             }
1933         }
1934     }
1935
1936     return $vmdata;
1937 };
1938
1939 sub load_vmfw_conf {
1940     my ($vmid) = @_;
1941
1942     my $vmfw_conf = {};
1943
1944     my $filename = "/etc/pve/firewall/$vmid.fw";
1945     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1946         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1947     }
1948
1949     return $vmfw_conf;
1950 }
1951
1952 my $format_rules = sub {
1953     my ($rules, $need_iface) = @_;
1954
1955     my $raw = '';
1956
1957     foreach my $rule (@$rules) {
1958         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1959             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
1960             $raw .= uc($rule->{type});
1961             $raw .= " " . $rule->{action};
1962             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
1963             $raw .= " " . ($rule->{source} || '-');
1964             $raw .= " " . ($rule->{dest} || '-');
1965             $raw .= " " . ($rule->{proto} || '-');
1966             $raw .= " " . ($rule->{dport} || '-');
1967             $raw .= " " . ($rule->{sport} || '-');
1968             $raw .= " # " . encode('utf8', $rule->{comment})
1969                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
1970             $raw .= "\n";
1971         } else {
1972             die "implement me '$rule->{type}'";
1973         }
1974     }
1975
1976     return $raw;
1977 };
1978
1979 my $format_options = sub {
1980     my ($options) = @_;
1981
1982     my $raw = '';
1983
1984     $raw .= "[OPTIONS]\n\n";
1985     foreach my $opt (keys %$options) {
1986         $raw .= "$opt: $options->{$opt}\n";
1987     }
1988     $raw .= "\n";
1989
1990     return $raw;
1991 };
1992
1993 sub save_vmfw_conf {
1994     my ($vmid, $vmfw_conf) = @_;
1995
1996     my $raw = '';
1997
1998     my $options = $vmfw_conf->{options};
1999     $raw .= &$format_options($options) if scalar(keys %$options);
2000
2001     my $rules = $vmfw_conf->{rules};
2002     if (scalar(@$rules)) {
2003         $raw .= "[RULES]\n\n";
2004         $raw .= &$format_rules($rules, 1);
2005         $raw .= "\n";
2006     }
2007
2008     my $filename = "/etc/pve/firewall/$vmid.fw";
2009     PVE::Tools::file_set_contents($filename, $raw);
2010 }
2011
2012 sub read_vm_firewall_configs {
2013     my ($vmdata) = @_;
2014     my $vmfw_configs = {};
2015
2016     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2017         my $vmfw_conf = load_vmfw_conf($vmid);
2018         next if !$vmfw_conf->{options}; # skip if file does not exists
2019         $vmfw_configs->{$vmid} = $vmfw_conf;
2020     }
2021
2022     return $vmfw_configs;
2023 }
2024
2025 sub get_option_log_level {
2026     my ($options, $k) = @_;
2027
2028     my $v = $options->{$k};
2029     $v = $default_log_level if !defined($v);
2030
2031     return undef if $v eq '' || $v eq 'nolog';
2032
2033     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2034
2035     return $v if ($v >= 0) && ($v <= 7);
2036
2037     warn "unknown log level ($k = '$v')\n";
2038
2039     return undef;
2040 }
2041
2042 sub generate_std_chains {
2043     my ($ruleset, $options) = @_;
2044
2045     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2046
2047     # same as shorewall smurflog.
2048     my $chain = 'PVEFW-smurflog';
2049
2050     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2051     push @{$pve_std_chains->{$chain}}, "-j DROP";
2052
2053     # same as shorewall logflags action.
2054     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2055     $chain = 'PVEFW-logflags';
2056     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2057     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2058     push @{$pve_std_chains->{$chain}}, "-j DROP";
2059
2060     foreach my $chain (keys %$pve_std_chains) {
2061         ruleset_create_chain($ruleset, $chain);
2062         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2063             if (ref($rule)) {
2064                 ruleset_generate_rule($ruleset, $chain, $rule);
2065             } else {
2066                 ruleset_addrule($ruleset, $chain, $rule);
2067             }
2068         }
2069     }
2070 }
2071
2072 sub generate_ipset_chains {
2073     my ($ipset_ruleset, $fw_conf) = @_;
2074
2075     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2076         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2077     }
2078 }
2079
2080 sub generate_ipset {
2081     my ($ipset_ruleset, $name, $options) = @_;
2082
2083     my $hashsize = scalar(@$options);
2084     if ($hashsize <= 64) {
2085         $hashsize = 64;
2086     } else {
2087         $hashsize = round_powerof2($hashsize);
2088     }
2089
2090     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2091
2092     foreach my $ip (@$options) {
2093         push @{$ipset_ruleset->{$name}}, "add $name $ip";
2094     }
2095 }
2096
2097 sub round_powerof2 {
2098     my ($int) = @_;
2099
2100     $int--;
2101     $int |= $int >> $_ foreach (1,2,4,8,16);
2102     return ++$int;
2103 }
2104
2105 sub save_pvefw_status {
2106     my ($status) = @_;
2107
2108     die "unknown status '$status' - internal error"
2109         if $status !~ m/^(stopped|active)$/;
2110
2111     mkdir dirname($pve_fw_status_filename);
2112     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2113 }
2114
2115 sub read_pvefw_status {
2116
2117     my $status = 'unknown';
2118
2119     return 'stopped' if ! -f $pve_fw_status_filename;
2120
2121     eval {
2122         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2123     };
2124     warn $@ if $@;
2125
2126     return $status;
2127 }
2128
2129 # fixme: move to pve-common PVE::ProcFSTools
2130 sub read_proc_net_route {
2131     my $filename = "/proc/net/route";
2132
2133     my $res = {};
2134
2135     my $fh = IO::File->new ($filename, "r");
2136     return $res if !$fh;
2137
2138     my $int_to_quad = sub {
2139         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2140     };
2141
2142     while (defined(my $line = <$fh>)) {
2143         next if $line =~/^Iface\s+Destination/; # skip head
2144         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2145         push @{$res->{$iface}}, {
2146             dest => &$int_to_quad(hex($dest)),
2147             gateway => &$int_to_quad(hex($gateway)),
2148             mask => &$int_to_quad(hex($mask)),
2149             metric => $metric,
2150             mtu => $mtu,
2151         };
2152     }
2153
2154     return $res;
2155 }
2156
2157 sub load_clusterfw_conf {
2158
2159     my $cluster_conf = {};
2160      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2161         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2162     }
2163
2164     return $cluster_conf;
2165 }
2166
2167 sub save_clusterfw_conf {
2168     my ($cluster_conf) = @_;
2169
2170     my $raw = '';
2171
2172     my $options = $cluster_conf->{options};
2173     $raw .= &$format_options($options) if scalar(keys %$options);
2174
2175     # fixme: save ipset
2176
2177     my $rules = $cluster_conf->{rules};
2178     if (scalar(@$rules)) {
2179         $raw .= "[RULES]\n\n";
2180         $raw .= &$format_rules($rules, 1);
2181         $raw .= "\n";
2182     }
2183
2184     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2185         my $rules = $cluster_conf->{groups}->{$group};
2186         $raw .= "[group $group]\n\n";
2187         $raw .= &$format_rules($rules, 0);
2188         $raw .= "\n";
2189     }
2190
2191     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2192 }
2193
2194 sub load_hostfw_conf {
2195
2196     my $hostfw_conf = {};
2197     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2198         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2199     }
2200     return $hostfw_conf;
2201 }
2202
2203 sub save_hostfw_conf {
2204     my ($hostfw_conf) = @_;
2205
2206     my $raw = '';
2207
2208     my $options = $hostfw_conf->{options};
2209     $raw .= &$format_options($options) if scalar(keys %$options);
2210
2211     my $rules = $hostfw_conf->{rules};
2212     if (scalar(@$rules)) {
2213         $raw .= "[RULES]\n\n";
2214         $raw .= &$format_rules($rules, 1);
2215         $raw .= "\n";
2216     }
2217
2218     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2219 }
2220
2221 sub compile {
2222     my $vmdata = read_local_vm_config();
2223     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2224
2225     my $routing_table = read_proc_net_route();
2226
2227     my $cluster_conf = load_clusterfw_conf();
2228
2229     my $ipset_ruleset = {};
2230     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2231
2232     my $ruleset = {};
2233
2234     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2235     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2236
2237     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2238
2239     my $hostfw_conf = load_hostfw_conf();
2240     my $hostfw_options = $hostfw_conf->{options} || {};
2241
2242     generate_std_chains($ruleset, $hostfw_options);
2243
2244     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2245
2246     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2247
2248     # generate firewall rules for QEMU VMs
2249     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2250         my $conf = $vmdata->{qemu}->{$vmid};
2251         my $vmfw_conf = $vmfw_configs->{$vmid};
2252         next if !$vmfw_conf;
2253         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2254
2255         foreach my $netid (keys %$conf) {
2256             next if $netid !~ m/^net(\d+)$/;
2257             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2258             next if !$net;
2259             my $iface = "tap${vmid}i$1";
2260
2261             my $bridge = $net->{bridge};
2262             next if !$bridge; # fixme: ?
2263
2264             $bridge .= "v$net->{tag}" if $net->{tag};
2265
2266             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2267
2268             my $macaddr = $net->{macaddr};
2269             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2270                                          $vmfw_conf, $vmid, $bridge, 'IN');
2271             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2272                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2273         }
2274     }
2275
2276     # generate firewall rules for OpenVZ containers
2277     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2278         my $conf = $vmdata->{openvz}->{$vmid};
2279
2280         my $vmfw_conf = $vmfw_configs->{$vmid};
2281         next if !$vmfw_conf;
2282         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2283
2284         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2285             my $ip = $conf->{ip_address}->{value};
2286             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2287             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2288         }
2289
2290         if ($conf->{netif} && $conf->{netif}->{value}) {
2291             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2292             foreach my $netid (keys %$netif) {
2293                 my $d = $netif->{$netid};
2294                 my $bridge = $d->{bridge};
2295                 if (!$bridge) {
2296                     warn "no bridge device for CT $vmid iface '$netid'\n";
2297                     next; # fixme?
2298                 }
2299
2300                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2301
2302                 my $macaddr = $d->{mac};
2303                 my $iface = $d->{host_ifname};
2304                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2305                                              $vmfw_conf, $vmid, $bridge, 'IN');
2306                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2307                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2308             }
2309         }
2310     }
2311
2312     if($hostfw_options->{optimize}){
2313
2314         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2315         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2316         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2317     }
2318
2319     # fixme: what log level should we use here?
2320     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2321
2322     # fixme: should we really block inter-bridge traffic?
2323
2324     # always allow traffic from containers?
2325     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2326
2327     # disable interbridge routing
2328     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2329     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2330     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2331     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2332     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2333     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2334
2335     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2336 }
2337
2338 sub get_ruleset_status {
2339     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2340
2341     my $statushash = {};
2342
2343     foreach my $chain (sort keys %$ruleset) {
2344         my $sig = &$digest_fn($ruleset->{$chain});
2345
2346         $statushash->{$chain}->{sig} = $sig;
2347
2348         my $oldsig = $active_chains->{$chain};
2349         if (!defined($oldsig)) {
2350             $statushash->{$chain}->{action} = 'create';
2351         } else {
2352             if ($oldsig eq $sig) {
2353                 $statushash->{$chain}->{action} = 'exists';
2354             } else {
2355                 $statushash->{$chain}->{action} = 'update';
2356             }
2357         }
2358         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2359         foreach my $cmd (@{$ruleset->{$chain}}) {
2360             print "\t$cmd\n" if $verbose;
2361         }
2362     }
2363
2364     foreach my $chain (sort keys %$active_chains) {
2365         if (!defined($ruleset->{$chain})) {
2366             my $sig = $active_chains->{$chain};
2367             $statushash->{$chain}->{action} = 'delete';
2368             $statushash->{$chain}->{sig} = $sig;
2369             print "delete $chain ($sig)\n" if $verbose;
2370         }
2371     }
2372
2373     return $statushash;
2374 }
2375
2376 sub print_sig_rule {
2377     my ($chain, $sig) = @_;
2378
2379     # We just use this to store a SHA1 checksum used to detect changes
2380     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2381 }
2382
2383 sub get_ruleset_cmdlist {
2384     my ($ruleset, $verbose) = @_;
2385
2386     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2387
2388     my ($active_chains, $hooks) = iptables_get_chains();
2389     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2390
2391     # create missing chains first
2392     foreach my $chain (sort keys %$ruleset) {
2393         my $stat = $statushash->{$chain};
2394         die "internal error" if !$stat;
2395         next if $stat->{action} ne 'create';
2396
2397         $cmdlist .= ":$chain - [0:0]\n";
2398     }
2399
2400     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2401         if (!$hooks->{$h}) {
2402             $cmdlist .= "-A $h -j PVEFW-$h\n";
2403         }
2404     }
2405
2406     foreach my $chain (sort keys %$ruleset) {
2407         my $stat = $statushash->{$chain};
2408         die "internal error" if !$stat;
2409
2410         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2411             $cmdlist .= "-F $chain\n";
2412             foreach my $cmd (@{$ruleset->{$chain}}) {
2413                 $cmdlist .= "$cmd\n";
2414             }
2415             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2416         } elsif ($stat->{action} eq 'delete') {
2417             die "internal error"; # this should not happen
2418         } elsif ($stat->{action} eq 'exists') {
2419             # do nothing
2420         } else {
2421             die "internal error - unknown status '$stat->{action}'";
2422         }
2423     }
2424
2425     foreach my $chain (keys %$statushash) {
2426         next if $statushash->{$chain}->{action} ne 'delete';
2427         $cmdlist .= "-F $chain\n";
2428     }
2429     foreach my $chain (keys %$statushash) {
2430         next if $statushash->{$chain}->{action} ne 'delete';
2431         next if $chain eq 'PVEFW-INPUT';
2432         next if $chain eq 'PVEFW-OUTPUT';
2433         next if $chain eq 'PVEFW-FORWARD';
2434         $cmdlist .= "-X $chain\n";
2435     }
2436
2437     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2438
2439     $cmdlist .= "COMMIT\n";
2440
2441     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2442 }
2443
2444 sub get_ipset_cmdlist {
2445     my ($ruleset, $verbose) = @_;
2446
2447     my $cmdlist = "";
2448
2449     my $delete_cmdlist = "";
2450
2451     my $active_chains = ipset_get_chains();
2452     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2453
2454     foreach my $chain (sort keys %$ruleset) {
2455         my $stat = $statushash->{$chain};
2456         die "internal error" if !$stat;
2457
2458         if ($stat->{action} eq 'create') {
2459             foreach my $cmd (@{$ruleset->{$chain}}) {
2460                 $cmdlist .= "$cmd\n";
2461             }
2462         }
2463
2464         if ($stat->{action} eq 'update') {
2465             my $chain_swap = $chain."_swap";
2466
2467             foreach my $cmd (@{$ruleset->{$chain}}) {
2468                 $cmd =~ s/$chain/$chain_swap/;
2469                 $cmdlist .= "$cmd\n";
2470             }
2471             $cmdlist .= "swap $chain_swap $chain\n";
2472             $cmdlist .= "flush $chain_swap\n";
2473             $cmdlist .= "destroy $chain_swap\n";
2474         }
2475
2476     }
2477
2478     foreach my $chain (keys %$statushash) {
2479         next if $statushash->{$chain}->{action} ne 'delete';
2480
2481         $delete_cmdlist .= "flush $chain\n";
2482         $delete_cmdlist .= "destroy $chain\n";
2483     }
2484
2485     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2486
2487     return ($cmdlist, $delete_cmdlist, $changes);
2488 }
2489
2490 sub apply_ruleset {
2491     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2492
2493     enable_bridge_firewall();
2494
2495     update_nf_conntrack_max($hostfw_conf);
2496
2497     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2498         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2499
2500     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2501
2502     if ($verbose) {
2503         if ($ipset_changes) {
2504             print "ipset changes:\n";
2505             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2506             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2507         }
2508
2509         if ($changes) {
2510             print "iptables changes:\n";
2511             print $cmdlist;
2512         }
2513     }
2514
2515     ipset_restore_cmdlist($ipset_create_cmdlist);
2516
2517     iptables_restore_cmdlist($cmdlist);
2518
2519     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2520
2521     # test: re-read status and check if everything is up to date
2522     my $active_chains = iptables_get_chains();
2523     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2524
2525     my $errors;
2526     foreach my $chain (sort keys %$ruleset) {
2527         my $stat = $statushash->{$chain};
2528         if ($stat->{action} ne 'exists') {
2529             warn "unable to update chain '$chain'\n";
2530             $errors = 1;
2531         }
2532     }
2533
2534     die "unable to apply firewall changes\n" if $errors;
2535 }
2536
2537 sub update_nf_conntrack_max {
2538     my ($hostfw_conf) = @_;
2539
2540     my $max = 65536; # reasonable default
2541
2542     my $options = $hostfw_conf->{options} || {};
2543
2544     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2545         $max = $options->{nf_conntrack_max};
2546         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2547     }
2548
2549     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2550     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2551
2552     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2553
2554     if ($current != $max) {
2555         my $hashsize = int($max/4);
2556         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2557         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2558     }
2559 }
2560
2561 sub remove_pvefw_chains {
2562
2563     my ($chash, $hooks) = iptables_get_chains();
2564     my $cmdlist = "*filter\n";
2565
2566     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2567         if ($hooks->{$h}) {
2568             $cmdlist .= "-D $h -j PVEFW-$h\n";
2569         }
2570     }
2571
2572     foreach my $chain (keys %$chash) {
2573         $cmdlist .= "-F $chain\n";
2574     }
2575
2576     foreach my $chain (keys %$chash) {
2577         $cmdlist .= "-X $chain\n";
2578     }
2579     $cmdlist .= "COMMIT\n";
2580
2581     iptables_restore_cmdlist($cmdlist);
2582 }
2583
2584 sub update {
2585     my ($start, $verbose) = @_;
2586
2587     my $code = sub {
2588         my $status = read_pvefw_status();
2589
2590         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2591
2592         if ($start || $status eq 'active') {
2593
2594             save_pvefw_status('active') if ($status ne 'active');
2595
2596             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2597         } else {
2598             print "Firewall not active (status = $status)\n" if $verbose;
2599         }
2600     };
2601
2602     run_locked($code);
2603 }
2604
2605
2606 1;