src/PVE/Firewall.pm

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