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 $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 793
 794 sub iptables_restore_cmdlist {
 795     my ($cmdlist) = @_;
 796
 797     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 798 }
 799
 800 sub ipset_restore_cmdlist {
 801     my ($cmdlist) = @_;
 802
 803     run_command("/usr/sbin/ipset restore", input => $cmdlist);
 804 }
 805
 806 sub iptables_get_chains {
 807
 808     my $res = {};
 809
 810     # check what chains we want to track
 811     my $is_pvefw_chain = sub {
 812         my $name = shift;
 813
 814         return 1 if $name =~ m/^PVEFW-\S+$/;
 815
 816         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 817
 818         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
 819
 820         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
 821
 822         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
 823         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 824
 825         return undef;
 826     };
 827
 828     my $table = '';
 829
 830     my $hooks = {};
 831
 832     my $parser = sub {
 833         my $line = shift;
 834
 835         return if $line =~ m/^#/;
 836         return if $line =~ m/^\s*$/;
 837
 838         if ($line =~ m/^\*(\S+)$/) {
 839             $table = $1;
 840             return;
 841         }
 842
 843         return if $table ne 'filter';
 844
 845         if ($line =~ m/^:(\S+)\s/) {
 846             my $chain = $1;
 847             return if !&$is_pvefw_chain($chain);
 848             $res->{$chain} = "unknown";
 849         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 850             my ($chain, $sig) = ($1, $2);
 851             return if !&$is_pvefw_chain($chain);
 852             $res->{$chain} = $sig;
 853         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
 854             $hooks->{$1} = 1;
 855         } else {
 856             # simply ignore the rest
 857             return;
 858         }
 859     };
 860
 861     run_command("/sbin/iptables-save", outfunc => $parser);
 862
 863     return wantarray ? ($res, $hooks) : $res;
 864 }
 865
 866 sub iptables_chain_digest {
 867     my ($rules) = @_;
 868     my $digest = Digest::SHA->new('sha1');
 869     foreach my $rule (@$rules) { # order is important
 870         $digest->add($rule);
 871     }
 872     return $digest->b64digest;
 873 }
 874
 875 sub ipset_chain_digest {
 876     my ($rules) = @_;
 877
 878     my $digest = Digest::SHA->new('sha1');
 879     foreach my $rule (sort @$rules) { # note: sorted
 880         $digest->add($rule);
 881     }
 882     return $digest->b64digest;
 883 }
 884
 885 sub ipset_get_chains {
 886
 887     my $res = {};
 888     my $chains = {};
 889
 890     my $parser = sub {
 891         my $line = shift;
 892
 893         return if $line =~ m/^#/;
 894         return if $line =~ m/^\s*$/;
 895         if ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
 896             my $chain = $1;
 897             $line =~ s/\s+$//; # delete trailing white space
 898             push @{$chains->{$chain}}, $line;
 899         } else {
 900             # simply ignore the rest
 901             return;
 902         }
 903     };
 904
 905     run_command("/usr/sbin/ipset save", outfunc => $parser);
 906
 907     # compute digest for each chain
 908     foreach my $chain (keys %$chains) {
 909         $res->{$chain} = ipset_chain_digest($chains->{$chain});
 910     }
 911
 912     return $res;
 913 }
 914
 915 sub ruleset_generate_cmdstr {
 916     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
 917
 918     return if defined($rule->{enable}) && !$rule->{enable};
 919
 920     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
 921
 922     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
 923     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
 924     my $nbsource = $rule->{source} ? parse_address_list( $rule->{source}) : 0;
 925     my $nbdest = $rule->{dest} ? parse_address_list($rule->{dest}) : 0;
 926
 927     my @cmd = ();
 928
 929     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
 930     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
 931
 932     push @cmd, "-m iprange --src-range" if $nbsource > 1;
 933     push @cmd, "-s $rule->{source}" if $rule->{source};
 934     push @cmd, "-m iprange --dst-range" if $nbdest > 1;
 935     push @cmd, "-d $rule->{dest}" if $rule->{dest};
 936
 937     if ($rule->{proto}) {
 938         push @cmd, "-p $rule->{proto}";
 939
 940         my $multiport = 0;
 941         $multiport++ if $nbdport > 1;
 942         $multiport++ if $nbsport > 1;
 943
 944         push @cmd, "--match multiport" if $multiport;
 945
 946         die "multiport: option '--sports' cannot be used together with '--dports'\n"
 947             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
 948
 949         if ($rule->{dport}) {
 950             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
 951                 # Note: we use dport to store --icmp-type
 952                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
 953                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
 954             } else {
 955                 if ($nbdport > 1) {
 956                     if ($multiport == 2) {
 957                         push @cmd,  "--ports $rule->{dport}";
 958                     } else {
 959                         push @cmd, "--dports $rule->{dport}";
 960                     }
 961                 } else {
 962                     push @cmd, "--dport $rule->{dport}";
 963                 }
 964             }
 965         }
 966
 967         if ($rule->{sport}) {
 968             if ($nbsport > 1) {
 969                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
 970             } else {
 971                 push @cmd, "--sport $rule->{sport}";
 972             }
 973         }
 974     } elsif ($rule->{dport} || $rule->{sport}) {
 975         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
 976         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
 977     }
 978
 979     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
 980
 981     if (my $action = $rule->{action}) {
 982         $action = $actions->{$action} if defined($actions->{$action});
 983         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
 984         push @cmd, $goto ? "-g $action" : "-j $action";
 985     }
 986
 987     return scalar(@cmd) ? join(' ', @cmd) : undef;
 988 }
 989
 990 my $apply_macro = sub {
 991     my ($macro_name, $param) = @_;
 992
 993     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 994     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 995
 996     my $rules = [];
 997
 998     foreach my $templ (@$macro_rules) {
 999         my $rule = {};
1000         my $param_used = {};
1001         foreach my $k (keys %$templ) {
1002             my $v = $templ->{$k};
1003             if ($v eq 'PARAM') {
1004                 $v = $param->{$k};
1005                 $param_used->{$k} = 1;
1006             } elsif ($v eq 'DEST') {
1007                 $v = $param->{dest};
1008                 $param_used->{dest} = 1;
1009             } elsif ($v eq 'SOURCE') {
1010                 $v = $param->{source};
1011                 $param_used->{source} = 1;
1012             }
1013
1014             die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1015             $rule->{$k} = $v;
1016         }
1017         foreach my $k (keys %$param) {
1018             next if $k eq 'macro';
1019             next if !defined($param->{$k});
1020             next if $param_used->{$k};
1021             if (defined($rule->{$k})) {
1022                 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1023                     if $rule->{$k} ne $param->{$k};
1024             } else {
1025                 $rule->{$k} = $param->{$k};
1026             }
1027         }
1028         push @$rules, $rule;
1029     }
1030
1031     return $rules;
1032 };
1033
1034 sub ruleset_generate_rule {
1035     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1036
1037     my $rules;
1038
1039     if ($rule->{macro}) {
1040         $rules = &$apply_macro($rule->{macro}, $rule);
1041     } else {
1042         $rules = [ $rule ];
1043     }
1044
1045     foreach my $tmp (@$rules) {
1046         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto)) {
1047             ruleset_addrule($ruleset, $chain, $cmdstr);
1048         }
1049     }
1050 }
1051
1052 sub ruleset_generate_rule_insert {
1053     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1054
1055     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1056
1057     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1058         ruleset_insertrule($ruleset, $chain, $cmdstr);
1059     }
1060 }
1061
1062 sub ruleset_create_chain {
1063     my ($ruleset, $chain) = @_;
1064
1065     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1066     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1067
1068     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1069
1070     $ruleset->{$chain} = [];
1071 }
1072
1073 sub ruleset_chain_exist {
1074     my ($ruleset, $chain) = @_;
1075
1076     return $ruleset->{$chain} ? 1 : undef;
1077 }
1078
1079 sub ruleset_addrule {
1080    my ($ruleset, $chain, $rule) = @_;
1081
1082    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1083
1084    push @{$ruleset->{$chain}}, "-A $chain $rule";
1085 }
1086
1087 sub ruleset_insertrule {
1088    my ($ruleset, $chain, $rule) = @_;
1089
1090    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1091
1092    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1093 }
1094
1095 sub get_log_rule_base {
1096     my ($chain, $vmid, $msg, $loglevel) = @_;
1097
1098     die "internal error - no log level" if !defined($loglevel);
1099
1100     $vmid = 0 if !defined($vmid);
1101
1102     # Note: we use special format for prefix to pass further
1103     # info to log daemon (VMID, LOGVELEL and CHAIN)
1104
1105     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1106 }
1107
1108 sub ruleset_addlog {
1109     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1110
1111     return if !defined($loglevel);
1112
1113     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1114
1115     $logrule = "$rule $logrule" if defined($rule);
1116
1117     ruleset_addrule($ruleset, $chain, $logrule)
1118 }
1119
1120 sub generate_bridge_chains {
1121     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1122
1123     my $options = $hostfw_conf->{options} || {};
1124
1125     die "error: detected direct route to bridge '$bridge'\n"
1126         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1127
1128     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1129         ruleset_create_chain($ruleset, "$bridge-FW");
1130         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1131         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1132     }
1133
1134     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1135         ruleset_create_chain($ruleset, "$bridge-OUT");
1136         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1137         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1138     }
1139
1140     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1141         ruleset_create_chain($ruleset, "$bridge-IN");
1142         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1143         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1144         # accept traffic to unmanaged bridge ports
1145         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1146     }
1147 }
1148
1149 sub ruleset_add_chain_policy {
1150     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1151
1152     if ($policy eq 'ACCEPT') {
1153
1154         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1155                               { ACCEPT =>  $accept_action});
1156
1157     } elsif ($policy eq 'DROP') {
1158
1159         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1160
1161         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1162
1163         ruleset_addrule($ruleset, $chain, "-j DROP");
1164     } elsif ($policy eq 'REJECT') {
1165         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1166
1167         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1168
1169         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1170     } else {
1171         # should not happen
1172         die "internal error: unknown policy '$policy'";
1173     }
1174 }
1175
1176 sub ruleset_create_vm_chain {
1177     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1178
1179     ruleset_create_chain($ruleset, $chain);
1180     my $accept = generate_nfqueue($options);
1181
1182     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1183         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1184     }
1185
1186     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1187         if ($direction eq 'OUT') {
1188             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1189                                                       proto => 'udp', sport => 68, dport => 67 });
1190         } else {
1191             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1192                                                       proto => 'udp', sport => 67, dport => 68 });
1193         }
1194     }
1195
1196     if ($options->{tcpflags}) {
1197         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1198     }
1199
1200     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1201     if($direction eq 'OUT'){
1202         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1203
1204     }else{
1205         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1206     }
1207     if ($direction eq 'OUT') {
1208         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1209             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1210         }
1211         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1212     }
1213
1214
1215 }
1216
1217 sub ruleset_generate_vm_rules {
1218     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1219
1220     my $lc_direction = lc($direction);
1221
1222     foreach my $rule (@$rules) {
1223         next if $rule->{iface} && $rule->{iface} ne $netid;
1224         next if !$rule->{enable};
1225         if ($rule->{type} eq 'group') {
1226             my $group_chain = "GROUP-$rule->{action}-$direction";
1227             if(!ruleset_chain_exist($ruleset, $group_chain)){
1228                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1229             }
1230             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1231             if ($direction eq 'OUT'){
1232                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1233             }else{
1234                 my $accept = generate_nfqueue($options);
1235                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1236             }
1237
1238         } else {
1239             next if $rule->{type} ne $lc_direction;
1240             if ($direction eq 'OUT') {
1241                 ruleset_generate_rule($ruleset, $chain, $rule,
1242                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
1243             } else {
1244                 my $accept = generate_nfqueue($options);
1245                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" });
1246             }
1247         }
1248     }
1249 }
1250
1251 sub generate_nfqueue {
1252     my ($options) = @_;
1253
1254     my $action = "";
1255     if($options->{ips}){
1256         $action = "NFQUEUE";
1257         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1258             if(defined($3) && defined($1)) {
1259                 $action .= " --queue-balance $1:$3";
1260             }elsif (defined($1)) {
1261                 $action .= " --queue-num $1";
1262             }
1263         }
1264         $action .= " --queue-bypass";
1265     }else{
1266         $action = "ACCEPT";
1267     }
1268
1269     return $action;
1270 }
1271
1272 sub ruleset_generate_vm_ipsrules {
1273     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1274
1275     if ($options->{ips} && $direction eq 'IN') {
1276         my $nfqueue = generate_nfqueue($options);
1277
1278         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1279             ruleset_create_chain($ruleset, "PVEFW-IPS");
1280         }
1281
1282         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1283             ruleset_create_chain($ruleset, "$bridge-IPS");
1284             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1285         }
1286
1287         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1288     }
1289 }
1290
1291 sub generate_venet_rules_direction {
1292     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1293
1294     parse_address_list($ip); # make sure we have a valid $ip list
1295
1296     my $lc_direction = lc($direction);
1297
1298     my $rules = $vmfw_conf->{rules};
1299
1300     my $options = $vmfw_conf->{options};
1301     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1302
1303     my $chain = "venet0-$vmid-$direction";
1304
1305     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1306
1307     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1308
1309     # implement policy
1310     my $policy;
1311
1312     if ($direction eq 'OUT') {
1313         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1314     } else {
1315         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1316     }
1317
1318     my $accept = generate_nfqueue($options);
1319     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1320     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1321
1322     # plug into FORWARD, INPUT and OUTPUT chain
1323     if ($direction eq 'OUT') {
1324         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1325             action => $chain,
1326             source => $ip,
1327             iface_in => 'venet0'});
1328
1329         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1330             action => $chain,
1331             source => $ip,
1332             iface_in => 'venet0'});
1333     } else {
1334         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1335             action => $chain,
1336             dest => $ip,
1337             iface_out => 'venet0'});
1338
1339         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1340             action => $chain,
1341             dest => $ip,
1342             iface_out => 'venet0'});
1343     }
1344 }
1345
1346 sub generate_tap_rules_direction {
1347     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1348
1349     my $lc_direction = lc($direction);
1350
1351     my $rules = $vmfw_conf->{rules};
1352
1353     my $options = $vmfw_conf->{options};
1354     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1355
1356     my $tapchain = "$iface-$direction";
1357
1358     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1359
1360     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1361
1362     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1363
1364     # implement policy
1365     my $policy;
1366
1367     if ($direction eq 'OUT') {
1368         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1369     } else {
1370         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1371     }
1372
1373     my $accept = generate_nfqueue($options);
1374     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1375     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1376
1377     # plug the tap chain to bridge chain
1378     if ($direction eq 'IN') {
1379         ruleset_insertrule($ruleset, "$bridge-IN",
1380                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1381     } else {
1382         ruleset_insertrule($ruleset, "$bridge-OUT",
1383                            "-m physdev --physdev-in $iface -j $tapchain");
1384     }
1385 }
1386
1387 sub enable_host_firewall {
1388     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1389
1390     # fixme: allow security groups
1391
1392     my $options = $hostfw_conf->{options};
1393     my $rules = $hostfw_conf->{rules};
1394
1395     # host inbound firewall
1396     my $chain = "PVEFW-HOST-IN";
1397     ruleset_create_chain($ruleset, $chain);
1398
1399     my $loglevel = get_option_log_level($options, "log_level_in");
1400
1401     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1402         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1403     }
1404
1405     if ($options->{tcpflags}) {
1406         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1407     }
1408
1409     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1410     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1411     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1412     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1413     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1414     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1415
1416     # we use RETURN because we need to check also tap rules
1417     my $accept_action = 'RETURN';
1418
1419     foreach my $rule (@$rules) {
1420         next if $rule->{type} ne 'in';
1421         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
1422     }
1423
1424     # implement input policy
1425     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1426     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1427
1428     # host outbound firewall
1429     $chain = "PVEFW-HOST-OUT";
1430     ruleset_create_chain($ruleset, $chain);
1431
1432     $loglevel = get_option_log_level($options, "log_level_out");
1433
1434     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1435     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1436     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1437     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1438     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1439     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1440
1441     # we use RETURN because we may want to check other thigs later
1442     $accept_action = 'RETURN';
1443
1444     foreach my $rule (@$rules) {
1445         next if $rule->{type} ne 'out';
1446         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
1447     }
1448
1449     # implement output policy
1450     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1451     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1452
1453     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1454     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1455 }
1456
1457 sub generate_group_rules {
1458     my ($ruleset, $cluster_conf, $group) = @_;
1459     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1460
1461     my $rules = $cluster_conf->{groups}->{$group};
1462
1463     my $chain = "GROUP-${group}-IN";
1464
1465     ruleset_create_chain($ruleset, $chain);
1466     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1467
1468     foreach my $rule (@$rules) {
1469         next if $rule->{type} ne 'in';
1470         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
1471     }
1472
1473     $chain = "GROUP-${group}-OUT";
1474
1475     ruleset_create_chain($ruleset, $chain);
1476     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1477
1478     foreach my $rule (@$rules) {
1479         next if $rule->{type} ne 'out';
1480         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1481         # check also other tap rules later
1482         ruleset_generate_rule($ruleset, $chain, $rule,
1483                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
1484     }
1485 }
1486
1487 my $MAX_NETS = 32;
1488 my $valid_netdev_names = {};
1489 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1490     $valid_netdev_names->{"net$i"} = 1;
1491 }
1492
1493 sub parse_fw_rule {
1494     my ($line, $need_iface, $allow_groups) = @_;
1495
1496     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1497
1498     # we can add single line comments to the end of the rule
1499     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1500
1501     # we can disable a rule when prefixed with '|'
1502     my $enable = 1;
1503
1504     $enable = 0 if $line =~ s/^\|//;
1505
1506     my @data = split(/\s+/, $line);
1507     my $expected_elements = $need_iface ? 8 : 7;
1508
1509     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1510
1511     if ($need_iface) {
1512         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1513     } else {
1514         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1515     }
1516
1517     die "incomplete rule\n" if ! ($type && $action);
1518
1519     my $macro;
1520
1521     $type = lc($type);
1522
1523     if ($type eq  'in' || $type eq 'out') {
1524         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1525             # OK
1526         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1527             $action = $2;
1528             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1529             die "unknown macro '$1'\n" if !$preferred_name;
1530             $macro = $preferred_name;
1531         } else {
1532             die "unknown action '$action'\n";
1533         }
1534     } elsif ($type eq 'group') {
1535         die "wrong number of rule elements\n" if scalar(@data) != 3;
1536         die "groups disabled\n" if !$allow_groups;
1537
1538         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1539     } else {
1540         die "unknown rule type '$type'\n";
1541     }
1542
1543     if ($need_iface) {
1544         $iface = undef if $iface && $iface eq '-';
1545     }
1546
1547     $proto = undef if $proto && $proto eq '-';
1548     pve_fw_verify_protocol_spec($proto) if $proto;
1549
1550     $source = undef if $source && $source eq '-';
1551     $dest = undef if $dest && $dest eq '-';
1552
1553     $dport = undef if $dport && $dport eq '-';
1554     $sport = undef if $sport && $sport eq '-';
1555
1556     parse_port_name_number_or_range($dport) if defined($dport);
1557     parse_port_name_number_or_range($sport) if defined($sport);
1558
1559     parse_address_list($source) if $source;
1560     parse_address_list($dest) if $dest;
1561
1562     return {
1563         type => $type,
1564         enable => $enable,
1565         comment => $comment,
1566         action => $action,
1567         macro => $macro,
1568         iface => $iface,
1569         source => $source,
1570         dest => $dest,
1571         proto => $proto,
1572         dport => $dport,
1573         sport => $sport,
1574     };
1575 }
1576
1577 sub parse_vmfw_option {
1578     my ($line) = @_;
1579
1580     my ($opt, $value);
1581
1582     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1583
1584     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1585         $opt = lc($1);
1586         $value = int($2);
1587     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1588         $opt = lc($1);
1589         $value = $2 ? lc($3) : '';
1590     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1591         $opt = lc($1);
1592         $value = uc($3);
1593     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1594         $opt = lc($1);
1595         $value = $2;
1596     } else {
1597         chomp $line;
1598         die "can't parse option '$line'\n"
1599     }
1600
1601     return ($opt, $value);
1602 }
1603
1604 sub parse_hostfw_option {
1605     my ($line) = @_;
1606
1607     my ($opt, $value);
1608
1609     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1610
1611     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1612         $opt = lc($1);
1613         $value = int($2);
1614     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1615         $opt = lc($1);
1616         $value = $2 ? lc($3) : '';
1617     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1618         $opt = lc($1);
1619         $value = uc($3);
1620     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1621         $opt = lc($1);
1622         $value = int($2);
1623     } else {
1624         chomp $line;
1625         die "can't parse option '$line'\n"
1626     }
1627
1628     return ($opt, $value);
1629 }
1630
1631 sub parse_clusterfw_option {
1632     my ($line) = @_;
1633
1634     my ($opt, $value);
1635
1636     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1637         $opt = lc($1);
1638         $value = int($2);
1639     } else {
1640         chomp $line;
1641         die "can't parse option '$line'\n"
1642     }
1643
1644     return ($opt, $value);
1645 }
1646
1647 sub parse_vm_fw_rules {
1648     my ($filename, $fh) = @_;
1649
1650     my $res = { rules => [], options => {}};
1651
1652     my $section;
1653
1654     my $digest = Digest::SHA->new('sha1');
1655
1656     while (defined(my $line = <$fh>)) {
1657         $digest->add($line);
1658
1659         next if $line =~ m/^#/;
1660         next if $line =~ m/^\s*$/;
1661
1662         my $linenr = $fh->input_line_number();
1663         my $prefix = "$filename (line $linenr)";
1664
1665         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1666             $section = lc($1);
1667             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1668             next;
1669         }
1670         if (!$section) {
1671             warn "$prefix: skip line - no section";
1672             next;
1673         }
1674
1675         next if !$res->{$section}; # skip undefined section
1676
1677         if ($section eq 'options') {
1678             eval {
1679                 my ($opt, $value) = parse_vmfw_option($line);
1680                 $res->{options}->{$opt} = $value;
1681             };
1682             warn "$prefix: $@" if $@;
1683             next;
1684         }
1685
1686         my $rule;
1687         eval { $rule = parse_fw_rule($line, 1, 1); };
1688         if (my $err = $@) {
1689             warn "$prefix: $err";
1690             next;
1691         }
1692
1693         push @{$res->{$section}}, $rule;
1694     }
1695
1696     $res->{digest} = $digest->b64digest;
1697
1698     return $res;
1699 }
1700
1701 sub parse_host_fw_rules {
1702     my ($filename, $fh) = @_;
1703
1704     my $res = { rules => [], options => {}};
1705
1706     my $section;
1707
1708     my $digest = Digest::SHA->new('sha1');
1709
1710     while (defined(my $line = <$fh>)) {
1711         $digest->add($line);
1712
1713         next if $line =~ m/^#/;
1714         next if $line =~ m/^\s*$/;
1715
1716         my $linenr = $fh->input_line_number();
1717         my $prefix = "$filename (line $linenr)";
1718
1719         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1720             $section = lc($1);
1721             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1722             next;
1723         }
1724         if (!$section) {
1725             warn "$prefix: skip line - no section";
1726             next;
1727         }
1728
1729         next if !$res->{$section}; # skip undefined section
1730
1731         if ($section eq 'options') {
1732             eval {
1733                 my ($opt, $value) = parse_hostfw_option($line);
1734                 $res->{options}->{$opt} = $value;
1735             };
1736             warn "$prefix: $@" if $@;
1737             next;
1738         }
1739
1740         my $rule;
1741         eval { $rule = parse_fw_rule($line, 1, 1); };
1742         if (my $err = $@) {
1743             warn "$prefix: $err";
1744             next;
1745         }
1746
1747         push @{$res->{$section}}, $rule;
1748     }
1749
1750     $res->{digest} = $digest->b64digest;
1751
1752     return $res;
1753 }
1754
1755 sub parse_cluster_fw_rules {
1756     my ($filename, $fh) = @_;
1757
1758     my $section;
1759     my $group;
1760
1761     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1762
1763     my $digest = Digest::SHA->new('sha1');
1764
1765     while (defined(my $line = <$fh>)) {
1766         $digest->add($line);
1767
1768         next if $line =~ m/^#/;
1769         next if $line =~ m/^\s*$/;
1770
1771         my $linenr = $fh->input_line_number();
1772         my $prefix = "$filename (line $linenr)";
1773
1774         if ($line =~ m/^\[options\]$/i) {
1775             $section = 'options';
1776             next;
1777         }
1778
1779         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1780             $section = 'groups';
1781             $group = lc($1);
1782             next;
1783         }
1784
1785         if ($line =~ m/^\[rules\]$/i) {
1786             $section = 'rules';
1787             next;
1788         }
1789
1790         if ($line =~ m/^\[netgroup\s+(\S+)\]\s*$/i) {
1791             $section = 'ipset';
1792             $group = lc($1);
1793             next;
1794         }
1795
1796         if (!$section) {
1797             warn "$prefix: skip line - no section";
1798             next;
1799         }
1800
1801         if ($section eq 'options') {
1802             eval {
1803                 my ($opt, $value) = parse_clusterfw_option($line);
1804                 $res->{options}->{$opt} = $value;
1805             };
1806             warn "$prefix: $@" if $@;
1807         } elsif ($section eq 'rules') {
1808             my $rule;
1809             eval { $rule = parse_fw_rule($line, 1, 1); };
1810             if (my $err = $@) {
1811                 warn "$prefix: $err";
1812                 next;
1813             }
1814             push @{$res->{$section}}, $rule;
1815         } elsif ($section eq 'groups') {
1816             my $rule;
1817             eval { $rule = parse_fw_rule($line, 0, 0); };
1818             if (my $err = $@) {
1819                 warn "$prefix: $err";
1820                 next;
1821             }
1822             push @{$res->{$section}->{$group}}, $rule;
1823         } elsif ($section eq 'ipset') {
1824             chomp $line;
1825             $line =~ m/^(\!)?(\s)?((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1826             my $nomatch = $1;
1827             my $ip = $3;
1828
1829             if(!$ip){
1830                 warn "$prefix: $line is not an valid ip address";
1831                 next;
1832             }
1833             if (!Net::IP->new($ip)) {
1834                 warn "$prefix: $line is not an valid ip address";
1835                 next;
1836             }
1837             $ip .= " nomatch" if $nomatch;
1838
1839             push @{$res->{$section}->{$group}}, $ip;
1840         }
1841     }
1842
1843     $res->{digest} = $digest->b64digest;
1844     return $res;
1845 }
1846
1847 sub run_locked {
1848     my ($code, @param) = @_;
1849
1850     my $timeout = 10;
1851
1852     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1853
1854     die $@ if $@;
1855
1856     return $res;
1857 }
1858
1859 sub read_local_vm_config {
1860
1861     my $openvz = {};
1862     my $qemu = {};
1863
1864     my $vmdata = { openvz => $openvz, qemu => $qemu };
1865
1866     my $vmlist = PVE::Cluster::get_vmlist();
1867     return $vmdata if !$vmlist || !$vmlist->{ids};
1868     my $ids = $vmlist->{ids};
1869
1870     foreach my $vmid (keys %$ids) {
1871         next if !$vmid; # skip VE0
1872         my $d = $ids->{$vmid};
1873         next if !$d->{node} || $d->{node} ne $nodename;
1874         next if !$d->{type};
1875         if ($d->{type} eq 'openvz') {
1876             if ($have_pve_manager) {
1877                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1878                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1879                     $openvz->{$vmid} = $conf;
1880                 }
1881             }
1882         } elsif ($d->{type} eq 'qemu') {
1883             if ($have_qemu_server) {
1884                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1885                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1886                     $qemu->{$vmid} = $conf;
1887                 }
1888             }
1889         }
1890     }
1891
1892     return $vmdata;
1893 };
1894
1895 sub load_vmfw_conf {
1896     my ($vmid) = @_;
1897
1898     my $vmfw_conf = {};
1899
1900     my $filename = "/etc/pve/firewall/$vmid.fw";
1901     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1902         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1903     }
1904
1905     return $vmfw_conf;
1906 }
1907
1908 sub read_vm_firewall_configs {
1909     my ($vmdata) = @_;
1910     my $vmfw_configs = {};
1911
1912     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
1913         my $vmfw_conf = load_vmfw_conf($vmid);
1914         next if !$vmfw_conf->{options}; # skip if file does not exists
1915         $vmfw_configs->{$vmid} = $vmfw_conf;
1916     }
1917
1918     return $vmfw_configs;
1919 }
1920
1921 sub get_option_log_level {
1922     my ($options, $k) = @_;
1923
1924     my $v = $options->{$k};
1925     $v = $default_log_level if !defined($v);
1926
1927     return undef if $v eq '' || $v eq 'nolog';
1928
1929     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
1930
1931     return $v if ($v >= 0) && ($v <= 7);
1932
1933     warn "unknown log level ($k = '$v')\n";
1934
1935     return undef;
1936 }
1937
1938 sub generate_std_chains {
1939     my ($ruleset, $options) = @_;
1940
1941     my $loglevel = get_option_log_level($options, 'smurf_log_level');
1942
1943     # same as shorewall smurflog.
1944     my $chain = 'PVEFW-smurflog';
1945
1946     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1947     push @{$pve_std_chains->{$chain}}, "-j DROP";
1948
1949     # same as shorewall logflags action.
1950     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
1951     $chain = 'PVEFW-logflags';
1952     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
1953     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
1954     push @{$pve_std_chains->{$chain}}, "-j DROP";
1955
1956     foreach my $chain (keys %$pve_std_chains) {
1957         ruleset_create_chain($ruleset, $chain);
1958         foreach my $rule (@{$pve_std_chains->{$chain}}) {
1959             if (ref($rule)) {
1960                 ruleset_generate_rule($ruleset, $chain, $rule);
1961             } else {
1962                 ruleset_addrule($ruleset, $chain, $rule);
1963             }
1964         }
1965     }
1966 }
1967
1968 sub generate_ipset_chains {
1969     my ($ipset_ruleset, $fw_conf) = @_;
1970
1971     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
1972         generate_ipset($ipset_ruleset, $ipset, $fw_conf->{ipset}->{$ipset});
1973     }
1974 }
1975
1976 sub generate_ipset {
1977     my ($ipset_ruleset, $name, $options) = @_;
1978
1979     my $hashsize = scalar(@$options);
1980     if ($hashsize <= 64) {
1981         $hashsize = 64;
1982     } else {
1983         $hashsize = round_powerof2($hashsize);
1984     }
1985
1986     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
1987
1988     foreach my $ip (@$options) {
1989         push @{$ipset_ruleset->{$name}}, "add $name $ip";
1990     }
1991 }
1992
1993 sub round_powerof2 {
1994     my ($int) = @_;
1995
1996     $int--;
1997     $int |= $int >> $_ foreach (1,2,4,8,16);
1998     return ++$int;
1999 }
2000
2001 sub save_pvefw_status {
2002     my ($status) = @_;
2003
2004     die "unknown status '$status' - internal error"
2005         if $status !~ m/^(stopped|active)$/;
2006
2007     mkdir dirname($pve_fw_status_filename);
2008     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2009 }
2010
2011 sub read_pvefw_status {
2012
2013     my $status = 'unknown';
2014
2015     return 'stopped' if ! -f $pve_fw_status_filename;
2016
2017     eval {
2018         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2019     };
2020     warn $@ if $@;
2021
2022     return $status;
2023 }
2024
2025 # fixme: move to pve-common PVE::ProcFSTools
2026 sub read_proc_net_route {
2027     my $filename = "/proc/net/route";
2028
2029     my $res = {};
2030
2031     my $fh = IO::File->new ($filename, "r");
2032     return $res if !$fh;
2033
2034     my $int_to_quad = sub {
2035         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2036     };
2037
2038     while (defined(my $line = <$fh>)) {
2039         next if $line =~/^Iface\s+Destination/; # skip head
2040         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2041         push @{$res->{$iface}}, {
2042             dest => &$int_to_quad(hex($dest)),
2043             gateway => &$int_to_quad(hex($gateway)),
2044             mask => &$int_to_quad(hex($mask)),
2045             metric => $metric,
2046             mtu => $mtu,
2047         };
2048     }
2049
2050     return $res;
2051 }
2052
2053 sub load_clusterfw_conf {
2054
2055     my $cluster_conf = {};
2056      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2057         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2058     }
2059
2060     return $cluster_conf;
2061 }
2062
2063 my $rules_to_conf = sub {
2064     my ($rules, $need_iface) = @_;
2065
2066     my $raw = '';
2067
2068     foreach my $rule (@$rules) {
2069         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2070             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2071             $raw .= uc($rule->{type});
2072             $raw .= " " . $rule->{action};
2073             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2074             $raw .= " " . ($rule->{source} || '-');
2075             $raw .= " " . ($rule->{dest} || '-');
2076             $raw .= " " . ($rule->{proto} || '-');
2077             $raw .= " " . ($rule->{dport} || '-');
2078             $raw .= " " . ($rule->{sport} || '-');
2079             $raw .= " # " . encode('utf8', $rule->{comment})
2080                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2081             $raw .= "\n";
2082         } else {
2083             die "implement me '$rule->{type}'";
2084         }
2085     }
2086
2087     return $raw;
2088 };
2089
2090 sub save_clusterfw_conf {
2091     my ($cluster_conf) = @_;
2092
2093     my $raw = '';
2094
2095     my $options = $cluster_conf->{options};
2096     if (scalar(keys %$options)) {
2097         $raw .= "[OPTIONS]\n\n";
2098         foreach my $opt (keys %$options) {
2099             $raw .= "$opt: $options->{$opt}\n";
2100         }
2101         $raw .= "\n";
2102     }
2103
2104     # fixme: save ipset
2105
2106     my $rules = $cluster_conf->{rules};
2107     if (scalar(@$rules)) {
2108         $raw .= "[RULES]\n\n";
2109         $raw .= &$rules_to_conf($rules, 1);
2110         $raw .= "\n";
2111     }
2112
2113     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2114         my $rules = $cluster_conf->{groups}->{$group};
2115         $raw .= "[group $group]\n\n";
2116         $raw .= &$rules_to_conf($rules, 0);
2117         $raw .= "\n";
2118     }
2119
2120     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2121 }
2122
2123 sub load_hostfw_conf {
2124
2125     my $hostfw_conf = {};
2126     my $filename = "/etc/pve/local/host.fw";
2127     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2128         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2129     }
2130     return $hostfw_conf;
2131 }
2132
2133 sub compile {
2134     my $vmdata = read_local_vm_config();
2135     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2136
2137     my $routing_table = read_proc_net_route();
2138
2139     my $cluster_conf = load_clusterfw_conf();
2140
2141     my $ipset_ruleset = {};
2142     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2143
2144     my $ruleset = {};
2145
2146     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2147     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2148
2149     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2150
2151     my $hostfw_conf = load_hostfw_conf();
2152     my $hostfw_options = $hostfw_conf->{options} || {};
2153
2154     generate_std_chains($ruleset, $hostfw_options);
2155
2156     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2157
2158     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2159
2160     # generate firewall rules for QEMU VMs
2161     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2162         my $conf = $vmdata->{qemu}->{$vmid};
2163         my $vmfw_conf = $vmfw_configs->{$vmid};
2164         next if !$vmfw_conf;
2165         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2166
2167         foreach my $netid (keys %$conf) {
2168             next if $netid !~ m/^net(\d+)$/;
2169             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2170             next if !$net;
2171             my $iface = "tap${vmid}i$1";
2172
2173             my $bridge = $net->{bridge};
2174             next if !$bridge; # fixme: ?
2175
2176             $bridge .= "v$net->{tag}" if $net->{tag};
2177
2178             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2179
2180             my $macaddr = $net->{macaddr};
2181             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2182                                          $vmfw_conf, $vmid, $bridge, 'IN');
2183             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2184                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2185         }
2186     }
2187
2188     # generate firewall rules for OpenVZ containers
2189     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2190         my $conf = $vmdata->{openvz}->{$vmid};
2191
2192         my $vmfw_conf = $vmfw_configs->{$vmid};
2193         next if !$vmfw_conf;
2194         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2195
2196         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2197             my $ip = $conf->{ip_address}->{value};
2198             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2199             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2200         }
2201
2202         if ($conf->{netif} && $conf->{netif}->{value}) {
2203             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2204             foreach my $netid (keys %$netif) {
2205                 my $d = $netif->{$netid};
2206                 my $bridge = $d->{bridge};
2207                 if (!$bridge) {
2208                     warn "no bridge device for CT $vmid iface '$netid'\n";
2209                     next; # fixme?
2210                 }
2211
2212                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2213
2214                 my $macaddr = $d->{mac};
2215                 my $iface = $d->{host_ifname};
2216                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2217                                              $vmfw_conf, $vmid, $bridge, 'IN');
2218                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2219                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2220             }
2221         }
2222     }
2223
2224     if($hostfw_options->{optimize}){
2225
2226         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2227         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2228         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2229     }
2230
2231     # fixme: what log level should we use here?
2232     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2233
2234     # fixme: should we really block inter-bridge traffic?
2235
2236     # always allow traffic from containers?
2237     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2238
2239     # disable interbridge routing
2240     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2241     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2242     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2243     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2244     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2245     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2246
2247     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2248 }
2249
2250 sub get_ruleset_status {
2251     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2252
2253     my $statushash = {};
2254
2255     foreach my $chain (sort keys %$ruleset) {
2256         my $sig = &$digest_fn($ruleset->{$chain});
2257
2258         $statushash->{$chain}->{sig} = $sig;
2259
2260         my $oldsig = $active_chains->{$chain};
2261         if (!defined($oldsig)) {
2262             $statushash->{$chain}->{action} = 'create';
2263         } else {
2264             if ($oldsig eq $sig) {
2265                 $statushash->{$chain}->{action} = 'exists';
2266             } else {
2267                 $statushash->{$chain}->{action} = 'update';
2268             }
2269         }
2270         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2271         foreach my $cmd (@{$ruleset->{$chain}}) {
2272             print "\t$cmd\n" if $verbose;
2273         }
2274     }
2275
2276     foreach my $chain (sort keys %$active_chains) {
2277         if (!defined($ruleset->{$chain})) {
2278             my $sig = $active_chains->{$chain};
2279             $statushash->{$chain}->{action} = 'delete';
2280             $statushash->{$chain}->{sig} = $sig;
2281             print "delete $chain ($sig)\n" if $verbose;
2282         }
2283     }
2284
2285     return $statushash;
2286 }
2287
2288 sub print_sig_rule {
2289     my ($chain, $sig) = @_;
2290
2291     # We just use this to store a SHA1 checksum used to detect changes
2292     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2293 }
2294
2295 sub get_ruleset_cmdlist {
2296     my ($ruleset, $verbose) = @_;
2297
2298     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2299
2300     my ($active_chains, $hooks) = iptables_get_chains();
2301     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2302
2303     # create missing chains first
2304     foreach my $chain (sort keys %$ruleset) {
2305         my $stat = $statushash->{$chain};
2306         die "internal error" if !$stat;
2307         next if $stat->{action} ne 'create';
2308
2309         $cmdlist .= ":$chain - [0:0]\n";
2310     }
2311
2312     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2313         if (!$hooks->{$h}) {
2314             $cmdlist .= "-A $h -j PVEFW-$h\n";
2315         }
2316     }
2317
2318     foreach my $chain (sort keys %$ruleset) {
2319         my $stat = $statushash->{$chain};
2320         die "internal error" if !$stat;
2321
2322         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2323             $cmdlist .= "-F $chain\n";
2324             foreach my $cmd (@{$ruleset->{$chain}}) {
2325                 $cmdlist .= "$cmd\n";
2326             }
2327             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2328         } elsif ($stat->{action} eq 'delete') {
2329             die "internal error"; # this should not happen
2330         } elsif ($stat->{action} eq 'exists') {
2331             # do nothing
2332         } else {
2333             die "internal error - unknown status '$stat->{action}'";
2334         }
2335     }
2336
2337     foreach my $chain (keys %$statushash) {
2338         next if $statushash->{$chain}->{action} ne 'delete';
2339         $cmdlist .= "-F $chain\n";
2340     }
2341     foreach my $chain (keys %$statushash) {
2342         next if $statushash->{$chain}->{action} ne 'delete';
2343         next if $chain eq 'PVEFW-INPUT';
2344         next if $chain eq 'PVEFW-OUTPUT';
2345         next if $chain eq 'PVEFW-FORWARD';
2346         $cmdlist .= "-X $chain\n";
2347     }
2348
2349     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2350
2351     $cmdlist .= "COMMIT\n";
2352
2353     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2354 }
2355
2356 sub get_ipset_cmdlist {
2357     my ($ruleset, $verbose) = @_;
2358
2359     my $cmdlist = "";
2360
2361     my $delete_cmdlist = "";
2362
2363     my $active_chains = ipset_get_chains();
2364     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2365
2366     foreach my $chain (sort keys %$ruleset) {
2367         my $stat = $statushash->{$chain};
2368         die "internal error" if !$stat;
2369
2370         if ($stat->{action} eq 'create') {
2371             foreach my $cmd (@{$ruleset->{$chain}}) {
2372                 $cmdlist .= "$cmd\n";
2373             }
2374         }
2375
2376         if ($stat->{action} eq 'update') {
2377             my $chain_swap = $chain."_swap";
2378
2379             foreach my $cmd (@{$ruleset->{$chain}}) {
2380                 $cmd =~ s/$chain/$chain_swap/;
2381                 $cmdlist .= "$cmd\n";
2382             }
2383             $cmdlist .= "swap $chain_swap $chain\n";
2384             $cmdlist .= "flush $chain_swap\n";
2385             $cmdlist .= "destroy $chain_swap\n";
2386         }
2387
2388     }
2389
2390     foreach my $chain (keys %$statushash) {
2391         next if $statushash->{$chain}->{action} ne 'delete';
2392
2393         $delete_cmdlist .= "flush $chain\n";
2394         $delete_cmdlist .= "destroy $chain\n";
2395     }
2396
2397     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2398
2399     return ($cmdlist, $delete_cmdlist, $changes);
2400 }
2401
2402 sub apply_ruleset {
2403     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2404
2405     enable_bridge_firewall();
2406
2407     update_nf_conntrack_max($hostfw_conf);
2408
2409     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2410         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2411
2412     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2413
2414     if ($verbose) {
2415         if ($ipset_changes) {
2416             print "ipset changes:\n";
2417             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2418             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2419         }
2420
2421         if ($changes) {
2422             print "iptables changes:\n";
2423             print $cmdlist;
2424         }
2425     }
2426
2427     ipset_restore_cmdlist($ipset_create_cmdlist);
2428
2429     iptables_restore_cmdlist($cmdlist);
2430
2431     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2432
2433     # test: re-read status and check if everything is up to date
2434     my $active_chains = iptables_get_chains();
2435     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2436
2437     my $errors;
2438     foreach my $chain (sort keys %$ruleset) {
2439         my $stat = $statushash->{$chain};
2440         if ($stat->{action} ne 'exists') {
2441             warn "unable to update chain '$chain'\n";
2442             $errors = 1;
2443         }
2444     }
2445
2446     die "unable to apply firewall changes\n" if $errors;
2447 }
2448
2449 sub update_nf_conntrack_max {
2450     my ($hostfw_conf) = @_;
2451
2452     my $max = 65536; # reasonable default
2453
2454     my $options = $hostfw_conf->{options} || {};
2455
2456     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2457         $max = $options->{nf_conntrack_max};
2458         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2459     }
2460
2461     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2462     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2463
2464     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2465
2466     if ($current != $max) {
2467         my $hashsize = int($max/4);
2468         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2469         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2470     }
2471 }
2472
2473 sub remove_pvefw_chains {
2474
2475     my ($chash, $hooks) = iptables_get_chains();
2476     my $cmdlist = "*filter\n";
2477
2478     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2479         if ($hooks->{$h}) {
2480             $cmdlist .= "-D $h -j PVEFW-$h\n";
2481         }
2482     }
2483
2484     foreach my $chain (keys %$chash) {
2485         $cmdlist .= "-F $chain\n";
2486     }
2487
2488     foreach my $chain (keys %$chash) {
2489         $cmdlist .= "-X $chain\n";
2490     }
2491     $cmdlist .= "COMMIT\n";
2492
2493     iptables_restore_cmdlist($cmdlist);
2494 }
2495
2496 sub update {
2497     my ($start, $verbose) = @_;
2498
2499     my $code = sub {
2500         my $status = read_pvefw_status();
2501
2502         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2503
2504         if ($start || $status eq 'active') {
2505
2506             save_pvefw_status('active') if ($status ne 'active');
2507
2508             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2509         } else {
2510             print "Firewall not active (status = $status)\n" if $verbose;
2511         }
2512     };
2513
2514     run_locked($code);
2515 }
2516
2517
2518 1;