src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::JSONSchema qw(get_standard_option);
  10 use PVE::Cluster;
  11 use PVE::ProcFSTools;
  12 use PVE::Tools;
  13 use File::Basename;
  14 use File::Path;
  15 use IO::File;
  16 use Net::IP;
  17 use PVE::Tools qw(run_command lock_file);
  18 use Encode;
  19
  20 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  21 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  22
  23 # dynamically include PVE::QemuServer and PVE::OpenVZ
  24 # to avoid dependency problems
  25 my $have_qemu_server;
  26 eval {
  27     require PVE::QemuServer;
  28     $have_qemu_server = 1;
  29 };
  30
  31 my $have_pve_manager;
  32 eval {
  33     require PVE::OpenVZ;
  34     $have_pve_manager = 1;
  35 };
  36
  37 my $feature_ipset_nomatch = 0;
  38 eval  {
  39     my (undef, undef, $release) = POSIX::uname();
  40     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  41         my ($major, $minor) = ($1, $2);
  42         $feature_ipset_nomatch = 1 if ($major > 3) ||
  43             ($major == 3 && $minor >= 7);
  44     }
  45
  46 };
  47
  48 use Data::Dumper;
  49
  50 my $nodename = PVE::INotify::nodename();
  51
  52 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  53 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  54
  55 my $default_log_level = 'info';
  56
  57 my $log_level_hash = {
  58     debug => 7,
  59     info => 6,
  60     notice => 5,
  61     warning => 4,
  62     err => 3,
  63     crit => 2,
  64     alert => 1,
  65     emerg => 0,
  66 };
  67
  68 # imported/converted from: /usr/share/shorewall/macro.*
  69 my $pve_fw_macros = {
  70     'Amanda' => [
  71         { action => 'PARAM', proto => 'udp', dport => '10080' },
  72         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  73     ],
  74     'Auth' => [
  75         { action => 'PARAM', proto => 'tcp', dport => '113' },
  76     ],
  77     'BGP' => [
  78         { action => 'PARAM', proto => 'tcp', dport => '179' },
  79     ],
  80     'BitTorrent' => [
  81         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  82         { action => 'PARAM', proto => 'udp', dport => '6881' },
  83     ],
  84     'BitTorrent32' => [
  85         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
  86         { action => 'PARAM', proto => 'udp', dport => '6881' },
  87     ],
  88     'CVS' => [
  89         { action => 'PARAM', proto => 'tcp', dport => '2401' },
  90     ],
  91     'Citrix' => [
  92         { action => 'PARAM', proto => 'tcp', dport => '1494' },
  93         { action => 'PARAM', proto => 'udp', dport => '1604' },
  94         { action => 'PARAM', proto => 'tcp', dport => '2598' },
  95     ],
  96     'DAAP' => [
  97         { action => 'PARAM', proto => 'tcp', dport => '3689' },
  98         { action => 'PARAM', proto => 'udp', dport => '3689' },
  99     ],
 100     'DCC' => [
 101         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 102     ],
 103     'DHCPfwd' => [
 104         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 105         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 106     ],
 107     'DNS' => [
 108         { action => 'PARAM', proto => 'udp', dport => '53' },
 109         { action => 'PARAM', proto => 'tcp', dport => '53' },
 110     ],
 111     'Distcc' => [
 112         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 113     ],
 114     'Edonkey' => [
 115         { action => 'PARAM', proto => 'tcp', dport => '4662' },
 116         { action => 'PARAM', proto => 'udp', dport => '4665' },
 117     ],
 118     'FTP' => [
 119         { action => 'PARAM', proto => 'tcp', dport => '21' },
 120     ],
 121     'Finger' => [
 122         { action => 'PARAM', proto => 'tcp', dport => '79' },
 123     ],
 124     'GNUnet' => [
 125         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 126         { action => 'PARAM', proto => 'udp', dport => '2086' },
 127         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 128         { action => 'PARAM', proto => 'udp', dport => '1080' },
 129     ],
 130     'GRE' => [
 131         { action => 'PARAM', proto => '47' },
 132         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 133     ],
 134     'Git' => [
 135         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 136     ],
 137     'Gnutella' => [
 138         { action => 'PARAM', proto => 'tcp', dport => '6346' },
 139         { action => 'PARAM', proto => 'udp', dport => '6346' },
 140     ],
 141     'HKP' => [
 142         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 143     ],
 144     'HTTP' => [
 145         { action => 'PARAM', proto => 'tcp', dport => '80' },
 146     ],
 147     'HTTPS' => [
 148         { action => 'PARAM', proto => 'tcp', dport => '443' },
 149     ],
 150     'ICPV2' => [
 151         { action => 'PARAM', proto => 'udp', dport => '3130' },
 152     ],
 153     'ICQ' => [
 154         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 155     ],
 156     'IMAP' => [
 157         { action => 'PARAM', proto => 'tcp', dport => '143' },
 158     ],
 159     'IMAPS' => [
 160         { action => 'PARAM', proto => 'tcp', dport => '993' },
 161     ],
 162     'IPIP' => [
 163         { action => 'PARAM', proto => '94' },
 164         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 165     ],
 166     'IPP' => [
 167         { action => 'PARAM', proto => 'tcp', dport => '631' },
 168     ],
 169     'IPPbrd' => [
 170         { action => 'PARAM', proto => 'udp', dport => '631' },
 171     ],
 172     'IPPserver' => [
 173         { action => 'PARAM', source => 'SOURCE', dest => 'DEST', proto => 'tcp', dport => '631' },
 174         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '631' },
 175     ],
 176     'IPsec' => [
 177         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 178         { action => 'PARAM', proto => '50' },
 179         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 180         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 181     ],
 182     'IPsecah' => [
 183         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 184         { action => 'PARAM', proto => '51' },
 185         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 186         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 187     ],
 188     'IPsecnat' => [
 189         { action => 'PARAM', proto => 'udp', dport => '500' },
 190         { action => 'PARAM', proto => 'udp', dport => '4500' },
 191         { action => 'PARAM', proto => '50' },
 192         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 193         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 194         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 195     ],
 196     'IRC' => [
 197         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 198     ],
 199     'JabberPlain' => [
 200         { action => 'PARAM', proto => 'tcp', dport => '5222' },
 201     ],
 202     'JabberSecure' => [
 203         { action => 'PARAM', proto => 'tcp', dport => '5223' },
 204     ],
 205     'Jabberd' => [
 206         { action => 'PARAM', proto => 'tcp', dport => '5269' },
 207     ],
 208     'Jetdirect' => [
 209         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 210     ],
 211     'L2TP' => [
 212         { action => 'PARAM', proto => 'udp', dport => '1701' },
 213         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 214     ],
 215     'LDAP' => [
 216         { action => 'PARAM', proto => 'tcp', dport => '389' },
 217     ],
 218     'LDAPS' => [
 219         { action => 'PARAM', proto => 'tcp', dport => '636' },
 220     ],
 221     'MSNP' => [
 222         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 223     ],
 224     'MSSQL' => [
 225         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 226     ],
 227     'Mail' => [
 228         { action => 'PARAM', proto => 'tcp', dport => '25' },
 229         { action => 'PARAM', proto => 'tcp', dport => '465' },
 230         { action => 'PARAM', proto => 'tcp', dport => '587' },
 231     ],
 232     'Munin' => [
 233         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 234     ],
 235     'MySQL' => [
 236         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 237     ],
 238     'NNTP' => [
 239         { action => 'PARAM', proto => 'tcp', dport => '119' },
 240     ],
 241     'NNTPS' => [
 242         { action => 'PARAM', proto => 'tcp', dport => '563' },
 243     ],
 244     'NTP' => [
 245         { action => 'PARAM', proto => 'udp', dport => '123' },
 246     ],
 247     'NTPbi' => [
 248         { action => 'PARAM', proto => 'udp', dport => '123' },
 249         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 250     ],
 251     'NTPbrd' => [
 252         { action => 'PARAM', proto => 'udp', dport => '123' },
 253         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '123' },
 254     ],
 255     'OSPF' => [
 256         { action => 'PARAM', proto => '89' },
 257     ],
 258     'OpenVPN' => [
 259         { action => 'PARAM', proto => 'udp', dport => '1194' },
 260     ],
 261     'PCA' => [
 262         { action => 'PARAM', proto => 'udp', dport => '5632' },
 263         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 264     ],
 265     'POP3' => [
 266         { action => 'PARAM', proto => 'tcp', dport => '110' },
 267     ],
 268     'POP3S' => [
 269         { action => 'PARAM', proto => 'tcp', dport => '995' },
 270     ],
 271     'PPtP' => [
 272         { action => 'PARAM', proto => '47' },
 273         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 274         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 275     ],
 276     'Ping' => [
 277         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 278     ],
 279     'PostgreSQL' => [
 280         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 281     ],
 282     'Printer' => [
 283         { action => 'PARAM', proto => 'tcp', dport => '515' },
 284     ],
 285     'RDP' => [
 286         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 287     ],
 288     'RIPbi' => [
 289         { action => 'PARAM', proto => 'udp', dport => '520' },
 290         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 291     ],
 292     'RNDC' => [
 293         { action => 'PARAM', proto => 'tcp', dport => '953' },
 294     ],
 295     'Razor' => [
 296         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 297     ],
 298     'Rdate' => [
 299         { action => 'PARAM', proto => 'tcp', dport => '37' },
 300     ],
 301     'Rsync' => [
 302         { action => 'PARAM', proto => 'tcp', dport => '873' },
 303     ],
 304     'SANE' => [
 305         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 306     ],
 307     'SMB' => [
 308         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 309         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 310         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 311         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 312     ],
 313     'SMBBI' => [
 314         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 315         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 316         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 317         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 318         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 319         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 320         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 321         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 322     ],
 323     'SMBswat' => [
 324         { action => 'PARAM', proto => 'tcp', dport => '901' },
 325     ],
 326     'SMTP' => [
 327         { action => 'PARAM', proto => 'tcp', dport => '25' },
 328     ],
 329     'SMTPS' => [
 330         { action => 'PARAM', proto => 'tcp', dport => '465' },
 331     ],
 332     'SNMP' => [
 333         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 334         { action => 'PARAM', proto => 'tcp', dport => '161' },
 335     ],
 336     'SPAMD' => [
 337         { action => 'PARAM', proto => 'tcp', dport => '783' },
 338     ],
 339     'SSH' => [
 340         { action => 'PARAM', proto => 'tcp', dport => '22' },
 341     ],
 342     'SVN' => [
 343         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 344     ],
 345     'SixXS' => [
 346         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 347         { action => 'PARAM', proto => 'udp', dport => '3740' },
 348         { action => 'PARAM', proto => '41' },
 349         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 350     ],
 351     'Squid' => [
 352         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 353     ],
 354     'Submission' => [
 355         { action => 'PARAM', proto => 'tcp', dport => '587' },
 356     ],
 357     'Syslog' => [
 358         { action => 'PARAM', proto => 'udp', dport => '514' },
 359         { action => 'PARAM', proto => 'tcp', dport => '514' },
 360     ],
 361     'TFTP' => [
 362         { action => 'PARAM', proto => 'udp', dport => '69' },
 363     ],
 364     'Telnet' => [
 365         { action => 'PARAM', proto => 'tcp', dport => '23' },
 366     ],
 367     'Telnets' => [
 368         { action => 'PARAM', proto => 'tcp', dport => '992' },
 369     ],
 370     'Time' => [
 371         { action => 'PARAM', proto => 'tcp', dport => '37' },
 372     ],
 373     'Trcrt' => [
 374         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 375         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 376     ],
 377     'VNC' => [
 378         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 379     ],
 380     'VNCL' => [
 381         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 382     ],
 383     'Web' => [
 384         { action => 'PARAM', proto => 'tcp', dport => '80' },
 385         { action => 'PARAM', proto => 'tcp', dport => '443' },
 386     ],
 387     'Webcache' => [
 388         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 389     ],
 390     'Webmin' => [
 391         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 392     ],
 393     'Whois' => [
 394         { action => 'PARAM', proto => 'tcp', dport => '43' },
 395     ],
 396 };
 397
 398 my $pve_fw_parsed_macros;
 399 my $pve_fw_preferred_macro_names = {};
 400
 401 my $pve_std_chains = {
 402     'PVEFW-SET-ACCEPT-MARK' => [
 403         "-j MARK --set-mark 1",
 404     ],
 405     'PVEFW-DropBroadcast' => [
 406         # same as shorewall 'Broadcast'
 407         # simply DROP BROADCAST/MULTICAST/ANYCAST
 408         # we can use this to reduce logging
 409         { action => 'DROP', dsttype => 'BROADCAST' },
 410         { action => 'DROP', dsttype => 'MULTICAST' },
 411         { action => 'DROP', dsttype => 'ANYCAST' },
 412         { action => 'DROP', dest => '224.0.0.0/4' },
 413     ],
 414     'PVEFW-reject' => [
 415         # same as shorewall 'reject'
 416         { action => 'DROP', dsttype => 'BROADCAST' },
 417         { action => 'DROP', source => '224.0.0.0/4' },
 418         { action => 'DROP', proto => 'icmp' },
 419         "-p tcp -j REJECT --reject-with tcp-reset",
 420         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 421         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 422         "-j REJECT --reject-with icmp-host-prohibited",
 423     ],
 424     'PVEFW-Drop' => [
 425         # same as shorewall 'Drop', which is equal to DROP,
 426         # but REJECT/DROP some packages to reduce logging,
 427         # and ACCEPT critical ICMP types
 428         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 429         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 430         { action => 'PVEFW-DropBroadcast' },
 431         # ACCEPT critical ICMP types
 432         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 433         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 434         # Drop packets with INVALID state
 435         "-m conntrack --ctstate INVALID -j DROP",
 436         # Drop Microsoft SMB noise
 437         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 438         { action => 'DROP', proto => 'udp', dport => '137:139'},
 439         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 440         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 441         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 442         # Drop new/NotSyn traffic so that it doesn't get logged
 443         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 444         # Drop DNS replies
 445         { action => 'DROP', proto => 'udp', sport => 53 },
 446     ],
 447     'PVEFW-Reject' => [
 448         # same as shorewall 'Reject', which is equal to Reject,
 449         # but REJECT/DROP some packages to reduce logging,
 450         # and ACCEPT critical ICMP types
 451         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 452         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 453         { action => 'PVEFW-DropBroadcast' },
 454         # ACCEPT critical ICMP types
 455         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 456         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 457         # Drop packets with INVALID state
 458         "-m conntrack --ctstate INVALID -j DROP",
 459         # Drop Microsoft SMB noise
 460         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 461         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 462         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 463         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 464         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 465         # Drop new/NotSyn traffic so that it doesn't get logged
 466         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 467         # Drop DNS replies
 468         { action => 'DROP', proto => 'udp', sport => 53 },
 469     ],
 470     'PVEFW-tcpflags' => [
 471         # same as shorewall tcpflags action.
 472         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 473         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 474         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 475         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 476         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 477         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 478     ],
 479     'PVEFW-smurfs' => [
 480         # same as shorewall smurfs action
 481         # Filter packets for smurfs (packets with a broadcast address as the source).
 482         "-s 0.0.0.0/32 -j RETURN",
 483         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 484         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 485     ],
 486 };
 487
 488 # iptables -p icmp -h
 489 my $icmp_type_names = {
 490     any => 1,
 491     'echo-reply' => 1,
 492     'destination-unreachable' => 1,
 493     'network-unreachable' => 1,
 494     'host-unreachable' => 1,
 495     'protocol-unreachable' => 1,
 496     'port-unreachable' => 1,
 497     'fragmentation-needed' => 1,
 498     'source-route-failed' => 1,
 499     'network-unknown' => 1,
 500     'host-unknown' => 1,
 501     'network-prohibited' => 1,
 502     'host-prohibited' => 1,
 503     'TOS-network-unreachable' => 1,
 504     'TOS-host-unreachable' => 1,
 505     'communication-prohibited' => 1,
 506     'host-precedence-violation' => 1,
 507     'precedence-cutoff' => 1,
 508     'source-quench' => 1,
 509     'redirect' => 1,
 510     'network-redirect' => 1,
 511     'host-redirect' => 1,
 512     'TOS-network-redirect' => 1,
 513     'TOS-host-redirect' => 1,
 514     'echo-request' => 1,
 515     'router-advertisement' => 1,
 516     'router-solicitation' => 1,
 517     'time-exceeded' => 1,
 518     'ttl-zero-during-transit' => 1,
 519     'ttl-zero-during-reassembly' => 1,
 520     'parameter-problem' => 1,
 521     'ip-header-bad' => 1,
 522     'required-option-missing' => 1,
 523     'timestamp-request' => 1,
 524     'timestamp-reply' => 1,
 525     'address-mask-request' => 1,
 526     'address-mask-reply' => 1,
 527 };
 528
 529 sub init_firewall_macros {
 530
 531     $pve_fw_parsed_macros = {};
 532
 533     foreach my $k (keys %$pve_fw_macros) {
 534         my $lc_name = lc($k);
 535         my $macro = $pve_fw_macros->{$k};
 536         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 537         $pve_fw_parsed_macros->{$k} = $macro;
 538     }
 539 }
 540
 541 init_firewall_macros();
 542
 543 my $etc_services;
 544
 545 sub get_etc_services {
 546
 547     return $etc_services if $etc_services;
 548
 549     my $filename = "/etc/services";
 550
 551     my $fh = IO::File->new($filename, O_RDONLY);
 552     if (!$fh) {
 553         warn "unable to read '$filename' - $!\n";
 554         return {};
 555     }
 556
 557     my $services = {};
 558
 559     while (my $line = <$fh>) {
 560         chomp ($line);
 561         next if $line =~m/^#/;
 562         next if ($line =~m/^\s*$/);
 563
 564         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 565             $services->{byid}->{$2}->{name} = $1;
 566             $services->{byid}->{$2}->{port} = $2;
 567             $services->{byid}->{$2}->{$3} = 1;
 568             $services->{byname}->{$1} = $services->{byid}->{$2};
 569         }
 570     }
 571
 572     close($fh);
 573
 574     $etc_services = $services;
 575
 576
 577     return $etc_services;
 578 }
 579
 580 my $etc_protocols;
 581
 582 sub get_etc_protocols {
 583     return $etc_protocols if $etc_protocols;
 584
 585     my $filename = "/etc/protocols";
 586
 587     my $fh = IO::File->new($filename, O_RDONLY);
 588     if (!$fh) {
 589         warn "unable to read '$filename' - $!\n";
 590         return {};
 591     }
 592
 593     my $protocols = {};
 594
 595     while (my $line = <$fh>) {
 596         chomp ($line);
 597         next if $line =~m/^#/;
 598         next if ($line =~m/^\s*$/);
 599
 600         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 601             $protocols->{byid}->{$2}->{name} = $1;
 602             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 603         }
 604     }
 605
 606     close($fh);
 607
 608     $etc_protocols = $protocols;
 609
 610     return $etc_protocols;
 611 }
 612
 613 sub parse_address_list {
 614     my ($str) = @_;
 615
 616     return if $str !~ m/^(\+)(\S+)$/; # ipset ref
 617
 618     my $count = 0;
 619     my $iprange = 0;
 620     foreach my $elem (split(/,/, $str)) {
 621         $count++;
 622         if (!Net::IP->new($elem)) {
 623             my $err = Net::IP::Error();
 624             die "invalid IP address: $err\n";
 625         }
 626         $iprange = 1 if $elem =~ m/-/;
 627     }
 628
 629     die "you can use a range in a list\n" if $iprange && $count > 1;
 630 }
 631
 632 sub parse_port_name_number_or_range {
 633     my ($str) = @_;
 634
 635     my $services = PVE::Firewall::get_etc_services();
 636     my $nbports = 0;
 637     foreach my $item (split(/,/, $str)) {
 638         my $portlist = "";
 639         my $oldpon = undef;
 640         $nbports++;
 641         foreach my $pon (split(':', $item, 2)) {
 642             $pon = $services->{byname}->{$pon}->{port} if $services->{byname}->{$pon}->{port};
 643             if ($pon =~ m/^\d+$/){
 644                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65535;
 645                 die "port '$pon' must be bigger than port '$oldpon' \n" if $oldpon && ($pon < $oldpon);
 646                 $oldpon = $pon;
 647             }else{
 648                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 649             }
 650         }
 651     }
 652
 653     return ($nbports);
 654 }
 655
 656 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 657 sub pve_fw_verify_port_spec {
 658    my ($portstr) = @_;
 659
 660     parse_port_name_number_or_range($portstr);
 661
 662    return $portstr;
 663 }
 664
 665 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 666 sub pve_fw_verify_v4addr_spec {
 667    my ($list) = @_;
 668
 669    parse_address_list($list);
 670
 671    return $list;
 672 }
 673
 674 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 675 sub pve_fw_verify_protocol_spec {
 676    my ($proto) = @_;
 677
 678    my $protocols = get_etc_protocols();
 679
 680    die "unknown protocol '$proto'\n" if $proto &&
 681        !(defined($protocols->{byname}->{$proto}) ||
 682          defined($protocols->{byid}->{$proto}));
 683
 684    return $proto;
 685 }
 686
 687
 688 # helper function for API
 689
 690 my $rule_properties = {
 691     pos => {
 692         description => "Update rule at position <pos>.",
 693         type => 'integer',
 694         minimum => 0,
 695         optional => 1,
 696     },
 697     digest => {
 698         type => 'string',
 699         optional => 1,
 700         maxLength => 27,
 701         minLength => 27,
 702     },
 703     type => {
 704         type => 'string',
 705         optional => 1,
 706         enum => ['in', 'out', 'group'],
 707     },
 708     action => {
 709         type => 'string',
 710         optional => 1,
 711         enum => ['ACCEPT', 'DROP', 'REJECT'],
 712     },
 713     macro => {
 714         type => 'string',
 715         optional => 1,
 716         maxLength => 128,
 717     },
 718     iface => get_standard_option('pve-iface', { optional => 1 }),
 719     source => {
 720         type => 'string', format => 'pve-fw-v4addr-spec',
 721         optional => 1,
 722     },
 723     dest => {
 724         type => 'string', format => 'pve-fw-v4addr-spec',
 725         optional => 1,
 726     },
 727     proto => {
 728         type => 'string', format => 'pve-fw-protocol-spec',
 729         optional => 1,
 730     },
 731     enable => {
 732         type => 'boolean',
 733         optional => 1,
 734     },
 735     sport => {
 736         type => 'string', format => 'pve-fw-port-spec',
 737         optional => 1,
 738     },
 739     dport => {
 740         type => 'string', format => 'pve-fw-port-spec',
 741         optional => 1,
 742     },
 743     comment => {
 744         type => 'string',
 745         optional => 1,
 746     },
 747 };
 748
 749 sub cleanup_fw_rule {
 750     my ($rule, $digest, $pos) = @_;
 751
 752     my $r = {};
 753
 754     foreach my $k (keys %$rule) {
 755         next if !$rule_properties->{$k};
 756         my $v = $rule->{$k};
 757         next if !defined($v);
 758         $r->{$k} = $v;
 759         $r->{digest} = $digest;
 760         $r->{pos} = $pos;
 761     }
 762
 763     return $r;
 764 }
 765
 766 sub add_rule_properties {
 767     my ($properties) = @_;
 768
 769     foreach my $k (keys %$rule_properties) {
 770         my $h = $rule_properties->{$k};
 771         # copy data, so that we can modify later without side effects
 772         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 773     }
 774
 775     return $properties;
 776 }
 777
 778 sub delete_rule_properties {
 779     my ($rule, $delete_str) = @_;
 780
 781     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 782         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 783             if !defined($rule_properties->{$opt});
 784         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 785             if $opt eq 'type' || $opt eq 'action';
 786         delete $rule->{$opt};
 787     }
 788
 789     return $rule;
 790 }
 791
 792 sub copy_rule_data {
 793     my ($rule, $param) = @_;
 794
 795     foreach my $k (keys %$rule_properties) {
 796         if (defined(my $v = $param->{$k})) {
 797             if ($v eq '' || $v eq '-') {
 798                 delete $rule->{$k};
 799             } else {
 800                 $rule->{$k} = $v;
 801             }
 802         } else {
 803             delete $rule->{$k};
 804         }
 805     }
 806     return $rule;
 807 }
 808
 809 # core functions
 810 my $bridge_firewall_enabled = 0;
 811
 812 sub enable_bridge_firewall {
 813
 814     return if $bridge_firewall_enabled; # only once
 815
 816     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
 817     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
 818
 819     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
 820     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
 821
 822     $bridge_firewall_enabled = 1;
 823 }
 824
 825 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 826
 827 sub iptables_restore_cmdlist {
 828     my ($cmdlist) = @_;
 829
 830     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 831 }
 832
 833 sub ipset_restore_cmdlist {
 834     my ($cmdlist) = @_;
 835
 836     run_command("/usr/sbin/ipset restore", input => $cmdlist);
 837 }
 838
 839 sub iptables_get_chains {
 840
 841     my $res = {};
 842
 843     # check what chains we want to track
 844     my $is_pvefw_chain = sub {
 845         my $name = shift;
 846
 847         return 1 if $name =~ m/^PVEFW-\S+$/;
 848
 849         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
 850
 851         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
 852
 853         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
 854
 855         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
 856         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
 857
 858         return undef;
 859     };
 860
 861     my $table = '';
 862
 863     my $hooks = {};
 864
 865     my $parser = sub {
 866         my $line = shift;
 867
 868         return if $line =~ m/^#/;
 869         return if $line =~ m/^\s*$/;
 870
 871         if ($line =~ m/^\*(\S+)$/) {
 872             $table = $1;
 873             return;
 874         }
 875
 876         return if $table ne 'filter';
 877
 878         if ($line =~ m/^:(\S+)\s/) {
 879             my $chain = $1;
 880             return if !&$is_pvefw_chain($chain);
 881             $res->{$chain} = "unknown";
 882         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
 883             my ($chain, $sig) = ($1, $2);
 884             return if !&$is_pvefw_chain($chain);
 885             $res->{$chain} = $sig;
 886         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
 887             $hooks->{$1} = 1;
 888         } else {
 889             # simply ignore the rest
 890             return;
 891         }
 892     };
 893
 894     run_command("/sbin/iptables-save", outfunc => $parser);
 895
 896     return wantarray ? ($res, $hooks) : $res;
 897 }
 898
 899 sub iptables_chain_digest {
 900     my ($rules) = @_;
 901     my $digest = Digest::SHA->new('sha1');
 902     foreach my $rule (@$rules) { # order is important
 903         $digest->add($rule);
 904     }
 905     return $digest->b64digest;
 906 }
 907
 908 sub ipset_chain_digest {
 909     my ($rules) = @_;
 910
 911     my $digest = Digest::SHA->new('sha1');
 912     foreach my $rule (sort @$rules) { # note: sorted
 913         $digest->add($rule);
 914     }
 915     return $digest->b64digest;
 916 }
 917
 918 sub ipset_get_chains {
 919
 920     my $res = {};
 921     my $chains = {};
 922
 923     my $parser = sub {
 924         my $line = shift;
 925
 926         return if $line =~ m/^#/;
 927         return if $line =~ m/^\s*$/;
 928         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
 929             my $chain = $1;
 930             $line =~ s/\s+$//; # delete trailing white space
 931             push @{$chains->{$chain}}, $line;
 932         } else {
 933             # simply ignore the rest
 934             return;
 935         }
 936     };
 937
 938     run_command("/usr/sbin/ipset save", outfunc => $parser);
 939
 940     # compute digest for each chain
 941     foreach my $chain (keys %$chains) {
 942         $res->{$chain} = ipset_chain_digest($chains->{$chain});
 943     }
 944
 945     return $res;
 946 }
 947
 948 sub ruleset_generate_cmdstr {
 949     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
 950
 951     return if defined($rule->{enable}) && !$rule->{enable};
 952
 953     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
 954
 955     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
 956     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
 957
 958     my @cmd = ();
 959
 960     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
 961     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
 962
 963     my $source = $rule->{source};
 964     my $dest = $rule->{dest};
 965
 966     if ($source) {
 967         if ($source =~ m/^(\+)(\S+)$/) {
 968             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
 969             push @cmd, "-m set --match-set PVEFW-$2 src";
 970
 971         } elsif ($source =~ m/\-/){
 972             push @cmd, "-m iprange --src-range $source";
 973
 974         } else {
 975             push @cmd, "-s $source";
 976         }
 977     }
 978
 979     if ($dest) {
 980         if ($dest =~ m/^(\+)(\S+)$/) {
 981             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
 982             push @cmd, "-m set --match-set PVEFW-$2 dst";
 983
 984         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
 985             push @cmd, "-m iprange --dst-range $dest";
 986
 987         } else {
 988             push @cmd, "-s $dest";
 989         }
 990     }
 991
 992     if ($rule->{proto}) {
 993         push @cmd, "-p $rule->{proto}";
 994
 995         my $multiport = 0;
 996         $multiport++ if $nbdport > 1;
 997         $multiport++ if $nbsport > 1;
 998
 999         push @cmd, "--match multiport" if $multiport;
1000
1001         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1002             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1003
1004         if ($rule->{dport}) {
1005             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1006                 # Note: we use dport to store --icmp-type
1007                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1008                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1009             } else {
1010                 if ($nbdport > 1) {
1011                     if ($multiport == 2) {
1012                         push @cmd,  "--ports $rule->{dport}";
1013                     } else {
1014                         push @cmd, "--dports $rule->{dport}";
1015                     }
1016                 } else {
1017                     push @cmd, "--dport $rule->{dport}";
1018                 }
1019             }
1020         }
1021
1022         if ($rule->{sport}) {
1023             if ($nbsport > 1) {
1024                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1025             } else {
1026                 push @cmd, "--sport $rule->{sport}";
1027             }
1028         }
1029     } elsif ($rule->{dport} || $rule->{sport}) {
1030         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1031         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1032     }
1033
1034     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1035
1036     if (my $action = $rule->{action}) {
1037         $action = $actions->{$action} if defined($actions->{$action});
1038         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1039         push @cmd, $goto ? "-g $action" : "-j $action";
1040     }
1041
1042     return scalar(@cmd) ? join(' ', @cmd) : undef;
1043 }
1044
1045 my $apply_macro = sub {
1046     my ($macro_name, $param) = @_;
1047
1048     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1049     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1050
1051     my $rules = [];
1052
1053     foreach my $templ (@$macro_rules) {
1054         my $rule = {};
1055         my $param_used = {};
1056         foreach my $k (keys %$templ) {
1057             my $v = $templ->{$k};
1058             if ($v eq 'PARAM') {
1059                 $v = $param->{$k};
1060                 $param_used->{$k} = 1;
1061             } elsif ($v eq 'DEST') {
1062                 $v = $param->{dest};
1063                 $param_used->{dest} = 1;
1064             } elsif ($v eq 'SOURCE') {
1065                 $v = $param->{source};
1066                 $param_used->{source} = 1;
1067             }
1068
1069             die "missing parameter '$k' in macro '$macro_name'\n" if !defined($v);
1070             $rule->{$k} = $v;
1071         }
1072         foreach my $k (keys %$param) {
1073             next if $k eq 'macro';
1074             next if !defined($param->{$k});
1075             next if $param_used->{$k};
1076             if (defined($rule->{$k})) {
1077                 die "parameter '$k' already define in macro (value = '$rule->{$k}')\n"
1078                     if $rule->{$k} ne $param->{$k};
1079             } else {
1080                 $rule->{$k} = $param->{$k};
1081             }
1082         }
1083         push @$rules, $rule;
1084     }
1085
1086     return $rules;
1087 };
1088
1089 sub ruleset_generate_rule {
1090     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1091
1092     my $rules;
1093
1094     if ($rule->{macro}) {
1095         $rules = &$apply_macro($rule->{macro}, $rule);
1096     } else {
1097         $rules = [ $rule ];
1098     }
1099
1100     foreach my $tmp (@$rules) {
1101         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1102             ruleset_addrule($ruleset, $chain, $cmdstr);
1103         }
1104     }
1105 }
1106
1107 sub ruleset_generate_rule_insert {
1108     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1109
1110     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1111
1112     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1113         ruleset_insertrule($ruleset, $chain, $cmdstr);
1114     }
1115 }
1116
1117 sub ruleset_create_chain {
1118     my ($ruleset, $chain) = @_;
1119
1120     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1121     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1122
1123     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1124
1125     $ruleset->{$chain} = [];
1126 }
1127
1128 sub ruleset_chain_exist {
1129     my ($ruleset, $chain) = @_;
1130
1131     return $ruleset->{$chain} ? 1 : undef;
1132 }
1133
1134 sub ruleset_addrule {
1135    my ($ruleset, $chain, $rule) = @_;
1136
1137    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1138
1139    push @{$ruleset->{$chain}}, "-A $chain $rule";
1140 }
1141
1142 sub ruleset_insertrule {
1143    my ($ruleset, $chain, $rule) = @_;
1144
1145    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1146
1147    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1148 }
1149
1150 sub get_log_rule_base {
1151     my ($chain, $vmid, $msg, $loglevel) = @_;
1152
1153     die "internal error - no log level" if !defined($loglevel);
1154
1155     $vmid = 0 if !defined($vmid);
1156
1157     # Note: we use special format for prefix to pass further
1158     # info to log daemon (VMID, LOGVELEL and CHAIN)
1159
1160     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1161 }
1162
1163 sub ruleset_addlog {
1164     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1165
1166     return if !defined($loglevel);
1167
1168     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1169
1170     $logrule = "$rule $logrule" if defined($rule);
1171
1172     ruleset_addrule($ruleset, $chain, $logrule)
1173 }
1174
1175 sub generate_bridge_chains {
1176     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1177
1178     my $options = $hostfw_conf->{options} || {};
1179
1180     die "error: detected direct route to bridge '$bridge'\n"
1181         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1182
1183     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1184         ruleset_create_chain($ruleset, "$bridge-FW");
1185         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1186         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1187     }
1188
1189     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1190         ruleset_create_chain($ruleset, "$bridge-OUT");
1191         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1192         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1193     }
1194
1195     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1196         ruleset_create_chain($ruleset, "$bridge-IN");
1197         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1198         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1199         # accept traffic to unmanaged bridge ports
1200         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1201     }
1202 }
1203
1204 sub ruleset_add_chain_policy {
1205     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1206
1207     if ($policy eq 'ACCEPT') {
1208
1209         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1210                               { ACCEPT =>  $accept_action});
1211
1212     } elsif ($policy eq 'DROP') {
1213
1214         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1215
1216         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1217
1218         ruleset_addrule($ruleset, $chain, "-j DROP");
1219     } elsif ($policy eq 'REJECT') {
1220         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1221
1222         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1223
1224         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1225     } else {
1226         # should not happen
1227         die "internal error: unknown policy '$policy'";
1228     }
1229 }
1230
1231 sub ruleset_create_vm_chain {
1232     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1233
1234     ruleset_create_chain($ruleset, $chain);
1235     my $accept = generate_nfqueue($options);
1236
1237     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1238         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1239     }
1240
1241     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1242         if ($direction eq 'OUT') {
1243             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1244                                                       proto => 'udp', sport => 68, dport => 67 });
1245         } else {
1246             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1247                                                       proto => 'udp', sport => 67, dport => 68 });
1248         }
1249     }
1250
1251     if ($options->{tcpflags}) {
1252         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1253     }
1254
1255     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1256     if ($direction eq 'OUT') {
1257         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1258     } else {
1259         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1260     }
1261
1262     if ($direction eq 'OUT') {
1263         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1264             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1265         }
1266         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1267     }
1268 }
1269
1270 sub ruleset_generate_vm_rules {
1271     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1272
1273     my $lc_direction = lc($direction);
1274
1275     foreach my $rule (@$rules) {
1276         next if $rule->{iface} && $rule->{iface} ne $netid;
1277         next if !$rule->{enable};
1278         if ($rule->{type} eq 'group') {
1279             my $group_chain = "GROUP-$rule->{action}-$direction";
1280             if(!ruleset_chain_exist($ruleset, $group_chain)){
1281                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1282             }
1283             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1284             if ($direction eq 'OUT'){
1285                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1286             }else{
1287                 my $accept = generate_nfqueue($options);
1288                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1289             }
1290
1291         } else {
1292             next if $rule->{type} ne $lc_direction;
1293             if ($direction eq 'OUT') {
1294                 ruleset_generate_rule($ruleset, $chain, $rule,
1295                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1296             } else {
1297                 my $accept = generate_nfqueue($options);
1298                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1299             }
1300         }
1301     }
1302 }
1303
1304 sub generate_nfqueue {
1305     my ($options) = @_;
1306
1307     my $action = "";
1308     if($options->{ips}){
1309         $action = "NFQUEUE";
1310         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1311             if(defined($3) && defined($1)) {
1312                 $action .= " --queue-balance $1:$3";
1313             }elsif (defined($1)) {
1314                 $action .= " --queue-num $1";
1315             }
1316         }
1317         $action .= " --queue-bypass";
1318     }else{
1319         $action = "ACCEPT";
1320     }
1321
1322     return $action;
1323 }
1324
1325 sub ruleset_generate_vm_ipsrules {
1326     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1327
1328     if ($options->{ips} && $direction eq 'IN') {
1329         my $nfqueue = generate_nfqueue($options);
1330
1331         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1332             ruleset_create_chain($ruleset, "PVEFW-IPS");
1333         }
1334
1335         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1336             ruleset_create_chain($ruleset, "$bridge-IPS");
1337             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1338         }
1339
1340         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1341     }
1342 }
1343
1344 sub generate_venet_rules_direction {
1345     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1346
1347     parse_address_list($ip); # make sure we have a valid $ip list
1348
1349     my $lc_direction = lc($direction);
1350
1351     my $rules = $vmfw_conf->{rules};
1352
1353     my $options = $vmfw_conf->{options};
1354     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1355
1356     my $chain = "venet0-$vmid-$direction";
1357
1358     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1359
1360     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1361
1362     # implement policy
1363     my $policy;
1364
1365     if ($direction eq 'OUT') {
1366         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1367     } else {
1368         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1369     }
1370
1371     my $accept = generate_nfqueue($options);
1372     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1373     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1374
1375     # plug into FORWARD, INPUT and OUTPUT chain
1376     if ($direction eq 'OUT') {
1377         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1378             action => $chain,
1379             source => $ip,
1380             iface_in => 'venet0'});
1381
1382         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1383             action => $chain,
1384             source => $ip,
1385             iface_in => 'venet0'});
1386     } else {
1387         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1388             action => $chain,
1389             dest => $ip,
1390             iface_out => 'venet0'});
1391
1392         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1393             action => $chain,
1394             dest => $ip,
1395             iface_out => 'venet0'});
1396     }
1397 }
1398
1399 sub generate_tap_rules_direction {
1400     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1401
1402     my $lc_direction = lc($direction);
1403
1404     my $rules = $vmfw_conf->{rules};
1405
1406     my $options = $vmfw_conf->{options};
1407     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1408
1409     my $tapchain = "$iface-$direction";
1410
1411     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1412
1413     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1414
1415     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1416
1417     # implement policy
1418     my $policy;
1419
1420     if ($direction eq 'OUT') {
1421         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1422     } else {
1423         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1424     }
1425
1426     my $accept = generate_nfqueue($options);
1427     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1428     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1429
1430     # plug the tap chain to bridge chain
1431     if ($direction eq 'IN') {
1432         ruleset_insertrule($ruleset, "$bridge-IN",
1433                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1434     } else {
1435         ruleset_insertrule($ruleset, "$bridge-OUT",
1436                            "-m physdev --physdev-in $iface -j $tapchain");
1437     }
1438 }
1439
1440 sub enable_host_firewall {
1441     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1442
1443     # fixme: allow security groups
1444
1445     my $options = $hostfw_conf->{options};
1446     my $rules = $hostfw_conf->{rules};
1447
1448     # host inbound firewall
1449     my $chain = "PVEFW-HOST-IN";
1450     ruleset_create_chain($ruleset, $chain);
1451
1452     my $loglevel = get_option_log_level($options, "log_level_in");
1453
1454     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1455         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1456     }
1457
1458     if ($options->{tcpflags}) {
1459         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1460     }
1461
1462     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1463     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1464     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1465     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1466     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1467     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1468
1469     # we use RETURN because we need to check also tap rules
1470     my $accept_action = 'RETURN';
1471
1472     foreach my $rule (@$rules) {
1473         next if $rule->{type} ne 'in';
1474         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1475     }
1476
1477     # implement input policy
1478     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1479     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1480
1481     # host outbound firewall
1482     $chain = "PVEFW-HOST-OUT";
1483     ruleset_create_chain($ruleset, $chain);
1484
1485     $loglevel = get_option_log_level($options, "log_level_out");
1486
1487     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1488     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1489     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1490     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1491     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1492     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1493
1494     # we use RETURN because we may want to check other thigs later
1495     $accept_action = 'RETURN';
1496
1497     foreach my $rule (@$rules) {
1498         next if $rule->{type} ne 'out';
1499         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1500     }
1501
1502     # implement output policy
1503     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1504     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1505
1506     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1507     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1508 }
1509
1510 sub generate_group_rules {
1511     my ($ruleset, $cluster_conf, $group) = @_;
1512     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1513
1514     my $rules = $cluster_conf->{groups}->{$group};
1515
1516     my $chain = "GROUP-${group}-IN";
1517
1518     ruleset_create_chain($ruleset, $chain);
1519     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1520
1521     foreach my $rule (@$rules) {
1522         next if $rule->{type} ne 'in';
1523         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1524     }
1525
1526     $chain = "GROUP-${group}-OUT";
1527
1528     ruleset_create_chain($ruleset, $chain);
1529     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1530
1531     foreach my $rule (@$rules) {
1532         next if $rule->{type} ne 'out';
1533         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1534         # check also other tap rules later
1535         ruleset_generate_rule($ruleset, $chain, $rule,
1536                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1537     }
1538 }
1539
1540 my $MAX_NETS = 32;
1541 my $valid_netdev_names = {};
1542 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1543     $valid_netdev_names->{"net$i"} = 1;
1544 }
1545
1546 sub parse_fw_rule {
1547     my ($line, $need_iface, $allow_groups) = @_;
1548
1549     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1550
1551     # we can add single line comments to the end of the rule
1552     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1553
1554     # we can disable a rule when prefixed with '|'
1555     my $enable = 1;
1556
1557     $enable = 0 if $line =~ s/^\|//;
1558
1559     my @data = split(/\s+/, $line);
1560     my $expected_elements = $need_iface ? 8 : 7;
1561
1562     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1563
1564     if ($need_iface) {
1565         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1566     } else {
1567         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1568     }
1569
1570     die "incomplete rule\n" if ! ($type && $action);
1571
1572     my $macro;
1573
1574     $type = lc($type);
1575
1576     if ($type eq  'in' || $type eq 'out') {
1577         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1578             # OK
1579         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1580             $action = $2;
1581             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1582             die "unknown macro '$1'\n" if !$preferred_name;
1583             $macro = $preferred_name;
1584         } else {
1585             die "unknown action '$action'\n";
1586         }
1587     } elsif ($type eq 'group') {
1588         die "wrong number of rule elements\n" if scalar(@data) != 3;
1589         die "groups disabled\n" if !$allow_groups;
1590
1591         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1592     } else {
1593         die "unknown rule type '$type'\n";
1594     }
1595
1596     if ($need_iface) {
1597         $iface = undef if $iface && $iface eq '-';
1598     }
1599
1600     $proto = undef if $proto && $proto eq '-';
1601     pve_fw_verify_protocol_spec($proto) if $proto;
1602
1603     $source = undef if $source && $source eq '-';
1604     $dest = undef if $dest && $dest eq '-';
1605
1606     $dport = undef if $dport && $dport eq '-';
1607     $sport = undef if $sport && $sport eq '-';
1608
1609     parse_port_name_number_or_range($dport) if defined($dport);
1610     parse_port_name_number_or_range($sport) if defined($sport);
1611
1612     parse_address_list($source) if $source;
1613     parse_address_list($dest) if $dest;
1614
1615     return {
1616         type => $type,
1617         enable => $enable,
1618         comment => $comment,
1619         action => $action,
1620         macro => $macro,
1621         iface => $iface,
1622         source => $source,
1623         dest => $dest,
1624         proto => $proto,
1625         dport => $dport,
1626         sport => $sport,
1627     };
1628 }
1629
1630 sub parse_vmfw_option {
1631     my ($line) = @_;
1632
1633     my ($opt, $value);
1634
1635     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1636
1637     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1638         $opt = lc($1);
1639         $value = int($2);
1640     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1641         $opt = lc($1);
1642         $value = $2 ? lc($3) : '';
1643     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1644         $opt = lc($1);
1645         $value = uc($3);
1646     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1647         $opt = lc($1);
1648         $value = $2;
1649     } else {
1650         chomp $line;
1651         die "can't parse option '$line'\n"
1652     }
1653
1654     return ($opt, $value);
1655 }
1656
1657 sub parse_hostfw_option {
1658     my ($line) = @_;
1659
1660     my ($opt, $value);
1661
1662     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1663
1664     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1665         $opt = lc($1);
1666         $value = int($2);
1667     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1668         $opt = lc($1);
1669         $value = $2 ? lc($3) : '';
1670     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1671         $opt = lc($1);
1672         $value = uc($3);
1673     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1674         $opt = lc($1);
1675         $value = int($2);
1676     } else {
1677         chomp $line;
1678         die "can't parse option '$line'\n"
1679     }
1680
1681     return ($opt, $value);
1682 }
1683
1684 sub parse_clusterfw_option {
1685     my ($line) = @_;
1686
1687     my ($opt, $value);
1688
1689     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1690         $opt = lc($1);
1691         $value = int($2);
1692     } else {
1693         chomp $line;
1694         die "can't parse option '$line'\n"
1695     }
1696
1697     return ($opt, $value);
1698 }
1699
1700 sub parse_vm_fw_rules {
1701     my ($filename, $fh) = @_;
1702
1703     my $res = { rules => [], options => {}};
1704
1705     my $section;
1706
1707     my $digest = Digest::SHA->new('sha1');
1708
1709     while (defined(my $line = <$fh>)) {
1710         $digest->add($line);
1711
1712         next if $line =~ m/^#/;
1713         next if $line =~ m/^\s*$/;
1714
1715         my $linenr = $fh->input_line_number();
1716         my $prefix = "$filename (line $linenr)";
1717
1718         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1719             $section = lc($1);
1720             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1721             next;
1722         }
1723         if (!$section) {
1724             warn "$prefix: skip line - no section";
1725             next;
1726         }
1727
1728         next if !$res->{$section}; # skip undefined section
1729
1730         if ($section eq 'options') {
1731             eval {
1732                 my ($opt, $value) = parse_vmfw_option($line);
1733                 $res->{options}->{$opt} = $value;
1734             };
1735             warn "$prefix: $@" if $@;
1736             next;
1737         }
1738
1739         my $rule;
1740         eval { $rule = parse_fw_rule($line, 1, 1); };
1741         if (my $err = $@) {
1742             warn "$prefix: $err";
1743             next;
1744         }
1745
1746         push @{$res->{$section}}, $rule;
1747     }
1748
1749     $res->{digest} = $digest->b64digest;
1750
1751     return $res;
1752 }
1753
1754 sub parse_host_fw_rules {
1755     my ($filename, $fh) = @_;
1756
1757     my $res = { rules => [], options => {}};
1758
1759     my $section;
1760
1761     my $digest = Digest::SHA->new('sha1');
1762
1763     while (defined(my $line = <$fh>)) {
1764         $digest->add($line);
1765
1766         next if $line =~ m/^#/;
1767         next if $line =~ m/^\s*$/;
1768
1769         my $linenr = $fh->input_line_number();
1770         my $prefix = "$filename (line $linenr)";
1771
1772         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1773             $section = lc($1);
1774             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1775             next;
1776         }
1777         if (!$section) {
1778             warn "$prefix: skip line - no section";
1779             next;
1780         }
1781
1782         next if !$res->{$section}; # skip undefined section
1783
1784         if ($section eq 'options') {
1785             eval {
1786                 my ($opt, $value) = parse_hostfw_option($line);
1787                 $res->{options}->{$opt} = $value;
1788             };
1789             warn "$prefix: $@" if $@;
1790             next;
1791         }
1792
1793         my $rule;
1794         eval { $rule = parse_fw_rule($line, 1, 1); };
1795         if (my $err = $@) {
1796             warn "$prefix: $err";
1797             next;
1798         }
1799
1800         push @{$res->{$section}}, $rule;
1801     }
1802
1803 $res->{digest} = $digest->b64digest;
1804
1805     return $res;
1806 }
1807
1808 sub parse_cluster_fw_rules {
1809     my ($filename, $fh) = @_;
1810
1811     my $section;
1812     my $group;
1813
1814     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1815
1816     my $digest = Digest::SHA->new('sha1');
1817
1818     while (defined(my $line = <$fh>)) {
1819         $digest->add($line);
1820
1821         next if $line =~ m/^#/;
1822         next if $line =~ m/^\s*$/;
1823
1824         my $linenr = $fh->input_line_number();
1825         my $prefix = "$filename (line $linenr)";
1826
1827         if ($line =~ m/^\[options\]$/i) {
1828             $section = 'options';
1829             next;
1830         }
1831
1832         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1833             $section = 'groups';
1834             $group = lc($1);
1835             next;
1836         }
1837
1838         if ($line =~ m/^\[rules\]$/i) {
1839             $section = 'rules';
1840             next;
1841         }
1842
1843         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1844             $section = 'ipset';
1845             $group = lc($1);
1846             next;
1847         }
1848
1849         if (!$section) {
1850             warn "$prefix: skip line - no section\n";
1851             next;
1852         }
1853
1854         if ($section eq 'options') {
1855             eval {
1856                 my ($opt, $value) = parse_clusterfw_option($line);
1857                 $res->{options}->{$opt} = $value;
1858             };
1859             warn "$prefix: $@" if $@;
1860         } elsif ($section eq 'rules') {
1861             my $rule;
1862             eval { $rule = parse_fw_rule($line, 1, 1); };
1863             if (my $err = $@) {
1864                 warn "$prefix: $err";
1865                 next;
1866             }
1867             push @{$res->{$section}}, $rule;
1868         } elsif ($section eq 'groups') {
1869             my $rule;
1870             eval { $rule = parse_fw_rule($line, 0, 0); };
1871             if (my $err = $@) {
1872                 warn "$prefix: $err";
1873                 next;
1874             }
1875             push @{$res->{$section}->{$group}}, $rule;
1876         } elsif ($section eq 'ipset') {
1877             chomp $line;
1878             $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
1879             my $nomatch = $1;
1880         my $ip = $2;
1881
1882             if(!$ip){
1883                 warn "$prefix: $line is not an valid ip address\n";
1884                 next;
1885             }
1886             if (!Net::IP->new($ip)) {
1887                 warn "$prefix: $line is not an valid ip address\n";
1888                 next;
1889             }
1890
1891             if ($nomatch) {
1892                 if ($feature_ipset_nomatch) {
1893                     push @{$res->{$section}->{$group}}, "$ip nomatch";
1894                 } else {
1895                     warn "$prefix: ignore $line - nomatch not supported by kernel\n";
1896                 }
1897             } else {
1898                 push @{$res->{$section}->{$group}}, $ip;
1899             }
1900         }
1901     }
1902
1903     $res->{digest} = $digest->b64digest;
1904     return $res;
1905 }
1906
1907 sub run_locked {
1908     my ($code, @param) = @_;
1909
1910     my $timeout = 10;
1911
1912     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
1913
1914     die $@ if $@;
1915
1916     return $res;
1917 }
1918
1919 sub read_local_vm_config {
1920
1921     my $openvz = {};
1922     my $qemu = {};
1923
1924     my $vmdata = { openvz => $openvz, qemu => $qemu };
1925
1926     my $vmlist = PVE::Cluster::get_vmlist();
1927     return $vmdata if !$vmlist || !$vmlist->{ids};
1928     my $ids = $vmlist->{ids};
1929
1930     foreach my $vmid (keys %$ids) {
1931         next if !$vmid; # skip VE0
1932         my $d = $ids->{$vmid};
1933         next if !$d->{node} || $d->{node} ne $nodename;
1934         next if !$d->{type};
1935         if ($d->{type} eq 'openvz') {
1936             if ($have_pve_manager) {
1937                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
1938                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1939                     $openvz->{$vmid} = $conf;
1940                 }
1941             }
1942         } elsif ($d->{type} eq 'qemu') {
1943             if ($have_qemu_server) {
1944                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
1945                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
1946                     $qemu->{$vmid} = $conf;
1947                 }
1948             }
1949         }
1950     }
1951
1952     return $vmdata;
1953 };
1954
1955 sub load_vmfw_conf {
1956     my ($vmid) = @_;
1957
1958     my $vmfw_conf = {};
1959
1960     my $filename = "/etc/pve/firewall/$vmid.fw";
1961     if (my $fh = IO::File->new($filename, O_RDONLY)) {
1962         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
1963     }
1964
1965     return $vmfw_conf;
1966 }
1967
1968 my $format_rules = sub {
1969     my ($rules, $need_iface) = @_;
1970
1971     my $raw = '';
1972
1973     foreach my $rule (@$rules) {
1974         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
1975             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
1976             $raw .= uc($rule->{type});
1977             $raw .= " " . $rule->{action};
1978             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
1979             $raw .= " " . ($rule->{source} || '-');
1980             $raw .= " " . ($rule->{dest} || '-');
1981             $raw .= " " . ($rule->{proto} || '-');
1982             $raw .= " " . ($rule->{dport} || '-');
1983             $raw .= " " . ($rule->{sport} || '-');
1984             $raw .= " # " . encode('utf8', $rule->{comment})
1985                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
1986             $raw .= "\n";
1987         } else {
1988             die "implement me '$rule->{type}'";
1989         }
1990     }
1991
1992     return $raw;
1993 };
1994
1995 my $format_options = sub {
1996     my ($options) = @_;
1997
1998     my $raw = '';
1999
2000     $raw .= "[OPTIONS]\n\n";
2001     foreach my $opt (keys %$options) {
2002         $raw .= "$opt: $options->{$opt}\n";
2003     }
2004     $raw .= "\n";
2005
2006     return $raw;
2007 };
2008
2009 sub save_vmfw_conf {
2010     my ($vmid, $vmfw_conf) = @_;
2011
2012     my $raw = '';
2013
2014     my $options = $vmfw_conf->{options};
2015     $raw .= &$format_options($options) if scalar(keys %$options);
2016
2017     my $rules = $vmfw_conf->{rules};
2018     if (scalar(@$rules)) {
2019         $raw .= "[RULES]\n\n";
2020         $raw .= &$format_rules($rules, 1);
2021         $raw .= "\n";
2022     }
2023
2024     my $filename = "/etc/pve/firewall/$vmid.fw";
2025     PVE::Tools::file_set_contents($filename, $raw);
2026 }
2027
2028 sub read_vm_firewall_configs {
2029     my ($vmdata) = @_;
2030     my $vmfw_configs = {};
2031
2032     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2033         my $vmfw_conf = load_vmfw_conf($vmid);
2034         next if !$vmfw_conf->{options}; # skip if file does not exists
2035         $vmfw_configs->{$vmid} = $vmfw_conf;
2036     }
2037
2038     return $vmfw_configs;
2039 }
2040
2041 sub get_option_log_level {
2042     my ($options, $k) = @_;
2043
2044     my $v = $options->{$k};
2045     $v = $default_log_level if !defined($v);
2046
2047     return undef if $v eq '' || $v eq 'nolog';
2048
2049     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2050
2051     return $v if ($v >= 0) && ($v <= 7);
2052
2053     warn "unknown log level ($k = '$v')\n";
2054
2055     return undef;
2056 }
2057
2058 sub generate_std_chains {
2059     my ($ruleset, $options) = @_;
2060
2061     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2062
2063     # same as shorewall smurflog.
2064     my $chain = 'PVEFW-smurflog';
2065
2066     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2067     push @{$pve_std_chains->{$chain}}, "-j DROP";
2068
2069     # same as shorewall logflags action.
2070     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2071     $chain = 'PVEFW-logflags';
2072     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2073     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2074     push @{$pve_std_chains->{$chain}}, "-j DROP";
2075
2076     foreach my $chain (keys %$pve_std_chains) {
2077         ruleset_create_chain($ruleset, $chain);
2078         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2079             if (ref($rule)) {
2080                 ruleset_generate_rule($ruleset, $chain, $rule);
2081             } else {
2082                 ruleset_addrule($ruleset, $chain, $rule);
2083             }
2084         }
2085     }
2086 }
2087
2088 sub generate_ipset_chains {
2089     my ($ipset_ruleset, $fw_conf) = @_;
2090
2091     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2092         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2093     }
2094 }
2095
2096 sub generate_ipset {
2097     my ($ipset_ruleset, $name, $options) = @_;
2098
2099     my $hashsize = scalar(@$options);
2100     if ($hashsize <= 64) {
2101         $hashsize = 64;
2102     } else {
2103         $hashsize = round_powerof2($hashsize);
2104     }
2105
2106     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2107
2108     foreach my $ip (@$options) {
2109         push @{$ipset_ruleset->{$name}}, "add $name $ip";
2110     }
2111 }
2112
2113 sub round_powerof2 {
2114     my ($int) = @_;
2115
2116     $int--;
2117     $int |= $int >> $_ foreach (1,2,4,8,16);
2118     return ++$int;
2119 }
2120
2121 sub save_pvefw_status {
2122     my ($status) = @_;
2123
2124     die "unknown status '$status' - internal error"
2125         if $status !~ m/^(stopped|active)$/;
2126
2127     mkdir dirname($pve_fw_status_filename);
2128     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2129 }
2130
2131 sub read_pvefw_status {
2132
2133     my $status = 'unknown';
2134
2135     return 'stopped' if ! -f $pve_fw_status_filename;
2136
2137     eval {
2138         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2139     };
2140     warn $@ if $@;
2141
2142     return $status;
2143 }
2144
2145 # fixme: move to pve-common PVE::ProcFSTools
2146 sub read_proc_net_route {
2147     my $filename = "/proc/net/route";
2148
2149     my $res = {};
2150
2151     my $fh = IO::File->new ($filename, "r");
2152     return $res if !$fh;
2153
2154     my $int_to_quad = sub {
2155         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2156     };
2157
2158     while (defined(my $line = <$fh>)) {
2159         next if $line =~/^Iface\s+Destination/; # skip head
2160         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2161         push @{$res->{$iface}}, {
2162             dest => &$int_to_quad(hex($dest)),
2163             gateway => &$int_to_quad(hex($gateway)),
2164             mask => &$int_to_quad(hex($mask)),
2165             metric => $metric,
2166             mtu => $mtu,
2167         };
2168     }
2169
2170     return $res;
2171 }
2172
2173 sub load_clusterfw_conf {
2174
2175     my $cluster_conf = {};
2176      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2177         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2178     }
2179
2180     return $cluster_conf;
2181 }
2182
2183 sub save_clusterfw_conf {
2184     my ($cluster_conf) = @_;
2185
2186     my $raw = '';
2187
2188     my $options = $cluster_conf->{options};
2189     $raw .= &$format_options($options) if scalar(keys %$options);
2190
2191     # fixme: save ipset
2192
2193     my $rules = $cluster_conf->{rules};
2194     if (scalar(@$rules)) {
2195         $raw .= "[RULES]\n\n";
2196         $raw .= &$format_rules($rules, 1);
2197         $raw .= "\n";
2198     }
2199
2200     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2201         my $rules = $cluster_conf->{groups}->{$group};
2202         $raw .= "[group $group]\n\n";
2203         $raw .= &$format_rules($rules, 0);
2204         $raw .= "\n";
2205     }
2206
2207     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2208 }
2209
2210 sub load_hostfw_conf {
2211
2212     my $hostfw_conf = {};
2213     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2214         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2215     }
2216     return $hostfw_conf;
2217 }
2218
2219 sub save_hostfw_conf {
2220     my ($hostfw_conf) = @_;
2221
2222     my $raw = '';
2223
2224     my $options = $hostfw_conf->{options};
2225     $raw .= &$format_options($options) if scalar(keys %$options);
2226
2227     my $rules = $hostfw_conf->{rules};
2228     if (scalar(@$rules)) {
2229         $raw .= "[RULES]\n\n";
2230         $raw .= &$format_rules($rules, 1);
2231         $raw .= "\n";
2232     }
2233
2234     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2235 }
2236
2237 sub compile {
2238     my $vmdata = read_local_vm_config();
2239     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2240
2241     my $routing_table = read_proc_net_route();
2242
2243     my $cluster_conf = load_clusterfw_conf();
2244
2245     my $ipset_ruleset = {};
2246     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2247
2248     my $ruleset = {};
2249
2250     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2251     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2252
2253     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2254
2255     my $hostfw_conf = load_hostfw_conf();
2256     my $hostfw_options = $hostfw_conf->{options} || {};
2257
2258     generate_std_chains($ruleset, $hostfw_options);
2259
2260     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2261
2262     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2263
2264     # generate firewall rules for QEMU VMs
2265     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2266         my $conf = $vmdata->{qemu}->{$vmid};
2267         my $vmfw_conf = $vmfw_configs->{$vmid};
2268         next if !$vmfw_conf;
2269         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2270
2271         foreach my $netid (keys %$conf) {
2272             next if $netid !~ m/^net(\d+)$/;
2273             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2274             next if !$net;
2275             my $iface = "tap${vmid}i$1";
2276
2277             my $bridge = $net->{bridge};
2278             next if !$bridge; # fixme: ?
2279
2280             $bridge .= "v$net->{tag}" if $net->{tag};
2281
2282             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2283
2284             my $macaddr = $net->{macaddr};
2285             generate_tap_rules_direction($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     # generate firewall rules for OpenVZ containers
2293     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2294         my $conf = $vmdata->{openvz}->{$vmid};
2295
2296         my $vmfw_conf = $vmfw_configs->{$vmid};
2297         next if !$vmfw_conf;
2298         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2299
2300         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2301             my $ip = $conf->{ip_address}->{value};
2302             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2303             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2304         }
2305
2306         if ($conf->{netif} && $conf->{netif}->{value}) {
2307             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2308             foreach my $netid (keys %$netif) {
2309                 my $d = $netif->{$netid};
2310                 my $bridge = $d->{bridge};
2311                 if (!$bridge) {
2312                     warn "no bridge device for CT $vmid iface '$netid'\n";
2313                     next; # fixme?
2314                 }
2315
2316                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2317
2318                 my $macaddr = $d->{mac};
2319                 my $iface = $d->{host_ifname};
2320                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2321                                              $vmfw_conf, $vmid, $bridge, 'IN');
2322                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2323                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2324             }
2325         }
2326     }
2327
2328     if($hostfw_options->{optimize}){
2329
2330         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2331         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2332         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2333     }
2334
2335     # fixme: what log level should we use here?
2336     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2337
2338     # fixme: should we really block inter-bridge traffic?
2339
2340     # always allow traffic from containers?
2341     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2342
2343     # disable interbridge routing
2344     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2345     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2346     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2347     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2348     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2349     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2350
2351     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2352 }
2353
2354 sub get_ruleset_status {
2355     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2356
2357     my $statushash = {};
2358
2359     foreach my $chain (sort keys %$ruleset) {
2360         my $sig = &$digest_fn($ruleset->{$chain});
2361
2362         $statushash->{$chain}->{sig} = $sig;
2363
2364         my $oldsig = $active_chains->{$chain};
2365         if (!defined($oldsig)) {
2366             $statushash->{$chain}->{action} = 'create';
2367         } else {
2368             if ($oldsig eq $sig) {
2369                 $statushash->{$chain}->{action} = 'exists';
2370             } else {
2371                 $statushash->{$chain}->{action} = 'update';
2372             }
2373         }
2374         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2375         foreach my $cmd (@{$ruleset->{$chain}}) {
2376             print "\t$cmd\n" if $verbose;
2377         }
2378     }
2379
2380     foreach my $chain (sort keys %$active_chains) {
2381         if (!defined($ruleset->{$chain})) {
2382             my $sig = $active_chains->{$chain};
2383             $statushash->{$chain}->{action} = 'delete';
2384             $statushash->{$chain}->{sig} = $sig;
2385             print "delete $chain ($sig)\n" if $verbose;
2386         }
2387     }
2388
2389     return $statushash;
2390 }
2391
2392 sub print_sig_rule {
2393     my ($chain, $sig) = @_;
2394
2395     # We just use this to store a SHA1 checksum used to detect changes
2396     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2397 }
2398
2399 sub get_ruleset_cmdlist {
2400     my ($ruleset, $verbose) = @_;
2401
2402     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2403
2404     my ($active_chains, $hooks) = iptables_get_chains();
2405     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2406
2407     # create missing chains first
2408     foreach my $chain (sort keys %$ruleset) {
2409         my $stat = $statushash->{$chain};
2410         die "internal error" if !$stat;
2411         next if $stat->{action} ne 'create';
2412
2413         $cmdlist .= ":$chain - [0:0]\n";
2414     }
2415
2416     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2417         if (!$hooks->{$h}) {
2418             $cmdlist .= "-A $h -j PVEFW-$h\n";
2419         }
2420     }
2421
2422     foreach my $chain (sort keys %$ruleset) {
2423         my $stat = $statushash->{$chain};
2424         die "internal error" if !$stat;
2425
2426         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2427             $cmdlist .= "-F $chain\n";
2428             foreach my $cmd (@{$ruleset->{$chain}}) {
2429                 $cmdlist .= "$cmd\n";
2430             }
2431             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2432         } elsif ($stat->{action} eq 'delete') {
2433             die "internal error"; # this should not happen
2434         } elsif ($stat->{action} eq 'exists') {
2435             # do nothing
2436         } else {
2437             die "internal error - unknown status '$stat->{action}'";
2438         }
2439     }
2440
2441     foreach my $chain (keys %$statushash) {
2442         next if $statushash->{$chain}->{action} ne 'delete';
2443         $cmdlist .= "-F $chain\n";
2444     }
2445     foreach my $chain (keys %$statushash) {
2446         next if $statushash->{$chain}->{action} ne 'delete';
2447         next if $chain eq 'PVEFW-INPUT';
2448         next if $chain eq 'PVEFW-OUTPUT';
2449         next if $chain eq 'PVEFW-FORWARD';
2450         $cmdlist .= "-X $chain\n";
2451     }
2452
2453     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2454
2455     $cmdlist .= "COMMIT\n";
2456
2457     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2458 }
2459
2460 sub get_ipset_cmdlist {
2461     my ($ruleset, $verbose) = @_;
2462
2463     my $cmdlist = "";
2464
2465     my $delete_cmdlist = "";
2466
2467     my $active_chains = ipset_get_chains();
2468     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2469
2470     foreach my $chain (sort keys %$ruleset) {
2471         my $stat = $statushash->{$chain};
2472         die "internal error" if !$stat;
2473
2474         if ($stat->{action} eq 'create') {
2475             foreach my $cmd (@{$ruleset->{$chain}}) {
2476                 $cmdlist .= "$cmd\n";
2477             }
2478         }
2479
2480         if ($stat->{action} eq 'update') {
2481             my $chain_swap = $chain."_swap";
2482
2483             foreach my $cmd (@{$ruleset->{$chain}}) {
2484                 $cmd =~ s/$chain/$chain_swap/;
2485                 $cmdlist .= "$cmd\n";
2486             }
2487             $cmdlist .= "swap $chain_swap $chain\n";
2488             $cmdlist .= "flush $chain_swap\n";
2489             $cmdlist .= "destroy $chain_swap\n";
2490         }
2491
2492     }
2493
2494     foreach my $chain (keys %$statushash) {
2495         next if $statushash->{$chain}->{action} ne 'delete';
2496
2497         $delete_cmdlist .= "flush $chain\n";
2498         $delete_cmdlist .= "destroy $chain\n";
2499     }
2500
2501     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2502
2503     return ($cmdlist, $delete_cmdlist, $changes);
2504 }
2505
2506 sub apply_ruleset {
2507     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2508
2509     enable_bridge_firewall();
2510
2511     update_nf_conntrack_max($hostfw_conf);
2512
2513     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2514         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2515
2516     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2517
2518     if ($verbose) {
2519         if ($ipset_changes) {
2520             print "ipset changes:\n";
2521             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2522             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2523         }
2524
2525         if ($changes) {
2526             print "iptables changes:\n";
2527             print $cmdlist;
2528         }
2529     }
2530
2531     ipset_restore_cmdlist($ipset_create_cmdlist);
2532
2533     iptables_restore_cmdlist($cmdlist);
2534
2535     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2536
2537     # test: re-read status and check if everything is up to date
2538     my $active_chains = iptables_get_chains();
2539     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2540
2541     my $errors;
2542     foreach my $chain (sort keys %$ruleset) {
2543         my $stat = $statushash->{$chain};
2544         if ($stat->{action} ne 'exists') {
2545             warn "unable to update chain '$chain'\n";
2546             $errors = 1;
2547         }
2548     }
2549
2550     die "unable to apply firewall changes\n" if $errors;
2551 }
2552
2553 sub update_nf_conntrack_max {
2554     my ($hostfw_conf) = @_;
2555
2556     my $max = 65536; # reasonable default
2557
2558     my $options = $hostfw_conf->{options} || {};
2559
2560     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2561         $max = $options->{nf_conntrack_max};
2562         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2563     }
2564
2565     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2566     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2567
2568     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2569
2570     if ($current != $max) {
2571         my $hashsize = int($max/4);
2572         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2573         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2574     }
2575 }
2576
2577 sub remove_pvefw_chains {
2578
2579     my ($chash, $hooks) = iptables_get_chains();
2580     my $cmdlist = "*filter\n";
2581
2582     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2583         if ($hooks->{$h}) {
2584             $cmdlist .= "-D $h -j PVEFW-$h\n";
2585         }
2586     }
2587
2588     foreach my $chain (keys %$chash) {
2589         $cmdlist .= "-F $chain\n";
2590     }
2591
2592     foreach my $chain (keys %$chash) {
2593         $cmdlist .= "-X $chain\n";
2594     }
2595     $cmdlist .= "COMMIT\n";
2596
2597     iptables_restore_cmdlist($cmdlist);
2598 }
2599
2600 sub update {
2601     my ($start, $verbose) = @_;
2602
2603     my $code = sub {
2604         my $status = read_pvefw_status();
2605
2606         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2607
2608         if ($start || $status eq 'active') {
2609
2610             save_pvefw_status('active') if ($status ne 'active');
2611
2612             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2613         } else {
2614             print "Firewall not active (status = $status)\n" if $verbose;
2615         }
2616     };
2617
2618     run_locked($code);
2619 }
2620
2621
2622 1;