src/PVE/Firewall.pm

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