src/PVE/Firewall.pm

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