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