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