src/PVE/Firewall.pm

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