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