src/PVE/Firewall.pm

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