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::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools;
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 my $feature_ipset_nomatch = 0;
  39 eval  {
  40     my (undef, undef, $release) = POSIX::uname();
  41     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  42         my ($major, $minor) = ($1, $2);
  43         $feature_ipset_nomatch = 1 if ($major > 3) ||
  44             ($major == 3 && $minor >= 7);
  45     }
  46
  47 };
  48
  49 use Data::Dumper;
  50
  51 my $nodename = PVE::INotify::nodename();
  52
  53 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  54 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  55
  56 my $default_log_level = 'info';
  57
  58 my $log_level_hash = {
  59     debug => 7,
  60     info => 6,
  61     notice => 5,
  62     warning => 4,
  63     err => 3,
  64     crit => 2,
  65     alert => 1,
  66     emerg => 0,
  67 };
  68
  69 # imported/converted from: /usr/share/shorewall/macro.*
  70 my $pve_fw_macros = {
  71     'Amanda' => [
  72         "Amanda Backup",
  73         { action => 'PARAM', proto => 'udp', dport => '10080' },
  74         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  75     ],
  76     'Auth' => [
  77         "Auth (identd) traffic",
  78         { action => 'PARAM', proto => 'tcp', dport => '113' },
  79     ],
  80     'BGP' => [
  81         "Border Gateway Protocol traffic",
  82         { action => 'PARAM', proto => 'tcp', dport => '179' },
  83     ],
  84     'BitTorrent' => [
  85         "BitTorrent traffic for BitTorrent 3.1 and earlier",
  86         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  87         { action => 'PARAM', proto => 'udp', dport => '6881' },
  88     ],
  89     'BitTorrent32' => [
  90         "BitTorrent traffic for BitTorrent 3.2 and later",
  91         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
  92         { action => 'PARAM', proto => 'udp', dport => '6881' },
  93     ],
  94     'CVS' => [
  95         "Concurrent Versions System pserver traffic",
  96         { action => 'PARAM', proto => 'tcp', dport => '2401' },
  97     ],
  98     'Citrix' => [
  99         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 100         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 101         { action => 'PARAM', proto => 'udp', dport => '1604' },
 102         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 103     ],
 104     'DAAP' => [
 105         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 106         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 107         { action => 'PARAM', proto => 'udp', dport => '3689' },
 108     ],
 109     'DCC' => [
 110         "Distributed Checksum Clearinghouse spam filtering mechanism",
 111         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 112     ],
 113     'DHCPfwd' => [
 114         "Forwarded DHCP traffic (bidirectional)",
 115         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 116         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 117     ],
 118     'DNS' => [
 119         "Domain Name System traffic (upd and tcp)",
 120         { action => 'PARAM', proto => 'udp', dport => '53' },
 121         { action => 'PARAM', proto => 'tcp', dport => '53' },
 122     ],
 123     'Distcc' => [
 124         "Distributed Compiler service",
 125         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 126     ],
 127     'FTP' => [
 128         "File Transfer Protocol",
 129         { action => 'PARAM', proto => 'tcp', dport => '21' },
 130     ],
 131     'Finger' => [
 132         "Finger protocol (RFC 742)",
 133         { action => 'PARAM', proto => 'tcp', dport => '79' },
 134     ],
 135     'GNUnet' => [
 136         "GNUnet secure peer-to-peer networking traffic",
 137         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 138         { action => 'PARAM', proto => 'udp', dport => '2086' },
 139         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 140         { action => 'PARAM', proto => 'udp', dport => '1080' },
 141     ],
 142     'GRE' => [
 143         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 144         { action => 'PARAM', proto => '47' },
 145         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 146     ],
 147     'Git' => [
 148         "Git distributed revision control traffic",
 149         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 150     ],
 151     'HKP' => [
 152         "OpenPGP HTTP keyserver protocol traffic",
 153         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 154     ],
 155     'HTTP' => [
 156         "Hypertext Transfer Protocol (WWW)",
 157         { action => 'PARAM', proto => 'tcp', dport => '80' },
 158     ],
 159     'HTTPS' => [
 160         "Hypertext Transfer Protocol (WWW) over SSL",
 161         { action => 'PARAM', proto => 'tcp', dport => '443' },
 162     ],
 163     'ICPV2' => [
 164         "Internet Cache Protocol V2 (Squid) traffic",
 165         { action => 'PARAM', proto => 'udp', dport => '3130' },
 166     ],
 167     'ICQ' => [
 168         "AOL Instant Messenger traffic",
 169         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 170     ],
 171     'IMAP' => [
 172         "Internet Message Access Protocol",
 173         { action => 'PARAM', proto => 'tcp', dport => '143' },
 174     ],
 175     'IMAPS' => [
 176         "Internet Message Access Protocol over SSL",
 177         { action => 'PARAM', proto => 'tcp', dport => '993' },
 178     ],
 179     'IPIP' => [
 180         "IPIP capsulation traffic (bidirectional)",
 181         { action => 'PARAM', proto => '94' },
 182         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 183     ],
 184     'IPsec' => [
 185         "IPsec traffic (bidirectional)",
 186         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 187         { action => 'PARAM', proto => '50' },
 188         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 189         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 190     ],
 191     'IPsecah' => [
 192         "IPsec authentication (AH) traffic (bidirectional)",
 193         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 194         { action => 'PARAM', proto => '51' },
 195         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 196         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 197     ],
 198     'IPsecnat' => [
 199         "IPsec traffic and Nat-Traversal (bidirectional)",
 200         { action => 'PARAM', proto => 'udp', dport => '500' },
 201         { action => 'PARAM', proto => 'udp', dport => '4500' },
 202         { action => 'PARAM', proto => '50' },
 203         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 204         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 205         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 206     ],
 207     'IRC' => [
 208         "Internet Relay Chat traffic",
 209         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 210     ],
 211     'Jetdirect' => [
 212         "HP Jetdirect printing",
 213         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 214     ],
 215     'L2TP' => [
 216         "Layer 2 Tunneling Protocol traffic",
 217         { action => 'PARAM', proto => 'udp', dport => '1701' },
 218         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 219     ],
 220     'LDAP' => [
 221         "Lightweight Directory Access Protocol traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '389' },
 223     ],
 224     'LDAPS' => [
 225         "Secure Lightweight Directory Access Protocol traffic",
 226         { action => 'PARAM', proto => 'tcp', dport => '636' },
 227     ],
 228     'MSNP' => [
 229         "Microsoft Notification Protocol",
 230         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 231     ],
 232     'MSSQL' => [
 233         "Microsoft SQL Server",
 234         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 235     ],
 236     'Mail' => [
 237         "Mail traffic (SMTP, SMTPS, Submission)",
 238         { action => 'PARAM', proto => 'tcp', dport => '25' },
 239         { action => 'PARAM', proto => 'tcp', dport => '465' },
 240         { action => 'PARAM', proto => 'tcp', dport => '587' },
 241     ],
 242     'Munin' => [
 243         "Munin networked resource monitoring traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 245     ],
 246     'MySQL' => [
 247         "MySQL server",
 248         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 249     ],
 250     'NNTP' => [
 251         "NNTP traffic (Usenet).",
 252         { action => 'PARAM', proto => 'tcp', dport => '119' },
 253     ],
 254     'NNTPS' => [
 255         "Encrypted NNTP traffic (Usenet)",
 256         { action => 'PARAM', proto => 'tcp', dport => '563' },
 257     ],
 258     'NTP' => [
 259         "Network Time Protocol (ntpd)",
 260         { action => 'PARAM', proto => 'udp', dport => '123' },
 261     ],
 262     'NTPbi' => [
 263         "Bi-directional NTP (for NTP peers)",
 264         { action => 'PARAM', proto => 'udp', dport => '123' },
 265         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 266     ],
 267     'OSPF' => [
 268         "OSPF multicast traffic",
 269         { action => 'PARAM', proto => '89' },
 270     ],
 271     'OpenVPN' => [
 272         "OpenVPN traffic",
 273         { action => 'PARAM', proto => 'udp', dport => '1194' },
 274     ],
 275     'PCA' => [
 276         "Symantec PCAnywere (tm)",
 277         { action => 'PARAM', proto => 'udp', dport => '5632' },
 278         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 279     ],
 280     'POP3' => [
 281         "POP3 traffic",
 282         { action => 'PARAM', proto => 'tcp', dport => '110' },
 283     ],
 284     'POP3S' => [
 285         "Encrypted POP3 traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '995' },
 287     ],
 288     'PPtP' => [
 289         "Point-to-Point Tunneling Protocol",
 290         { action => 'PARAM', proto => '47' },
 291         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 292         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 293     ],
 294     'Ping' => [
 295         "ICMP echo request",
 296         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 297     ],
 298     'PostgreSQL' => [
 299         "PostgreSQL server",
 300         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 301     ],
 302     'Printer' => [
 303         "Line Printer protocol printing",
 304         { action => 'PARAM', proto => 'tcp', dport => '515' },
 305     ],
 306     'RDP' => [
 307         "Microsoft Remote Desktop Protocol traffic",
 308         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 309     ],
 310     'RIPbi' => [
 311         "Routing Information Protocol (bidirectional)",
 312         { action => 'PARAM', proto => 'udp', dport => '520' },
 313         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 314     ],
 315     'RNDC' => [
 316         "BIND remote management protocol",
 317         { action => 'PARAM', proto => 'tcp', dport => '953' },
 318     ],
 319     'Razor' => [
 320         "Razor Antispam System",
 321         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 322     ],
 323     'Rdate' => [
 324         "Remote time retrieval (rdate)",
 325         { action => 'PARAM', proto => 'tcp', dport => '37' },
 326     ],
 327     'Rsync' => [
 328         "Rsync server",
 329         { action => 'PARAM', proto => 'tcp', dport => '873' },
 330     ],
 331     'SANE' => [
 332         "SANE network scanning",
 333         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 334     ],
 335     'SMB' => [
 336         "Microsoft SMB traffic",
 337         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 338         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 339         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 340         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 341     ],
 342     'SMBBI' => [
 343         "Microsoft SMB traffic (bidirectional)",
 344         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 345         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 346         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 347         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 348         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 349         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 350         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 351         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 352     ],
 353     'SMBswat' => [
 354         "Samba Web Administration Tool",
 355         { action => 'PARAM', proto => 'tcp', dport => '901' },
 356     ],
 357     'SMTP' => [
 358         "Simple Mail Transfer Protocol",
 359         { action => 'PARAM', proto => 'tcp', dport => '25' },
 360     ],
 361     'SMTPS' => [
 362         "Encrypted Simple Mail Transfer Protocol",
 363         { action => 'PARAM', proto => 'tcp', dport => '465' },
 364     ],
 365     'SNMP' => [
 366         "Simple Network Management Protocol",
 367         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 368         { action => 'PARAM', proto => 'tcp', dport => '161' },
 369     ],
 370     'SPAMD' => [
 371         "Spam Assassin SPAMD traffic",
 372         { action => 'PARAM', proto => 'tcp', dport => '783' },
 373     ],
 374     'SSH' => [
 375         "Secure shell traffic",
 376         { action => 'PARAM', proto => 'tcp', dport => '22' },
 377     ],
 378     'SVN' => [
 379         "Subversion server (svnserve)",
 380         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 381     ],
 382     'SixXS' => [
 383         "SixXS IPv6 Deployment and Tunnel Broker",
 384         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 385         { action => 'PARAM', proto => 'udp', dport => '3740' },
 386         { action => 'PARAM', proto => '41' },
 387         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 388     ],
 389     'Squid' => [
 390         "Squid web proxy traffic",
 391         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 392     ],
 393     'Submission' => [
 394         "Mail message submission traffic",
 395         { action => 'PARAM', proto => 'tcp', dport => '587' },
 396     ],
 397     'Syslog' => [
 398         "Syslog protocol (RFC 5424) traffic",
 399         { action => 'PARAM', proto => 'udp', dport => '514' },
 400         { action => 'PARAM', proto => 'tcp', dport => '514' },
 401     ],
 402     'TFTP' => [
 403         "Trivial File Transfer Protocol traffic",
 404         { action => 'PARAM', proto => 'udp', dport => '69' },
 405     ],
 406     'Telnet' => [
 407         "Telnet traffic",
 408         { action => 'PARAM', proto => 'tcp', dport => '23' },
 409     ],
 410     'Telnets' => [
 411         "Telnet over SSL",
 412         { action => 'PARAM', proto => 'tcp', dport => '992' },
 413     ],
 414     'Time' => [
 415         "RFC 868 Time protocol",
 416         { action => 'PARAM', proto => 'tcp', dport => '37' },
 417     ],
 418     'Trcrt' => [
 419         "Traceroute (for up to 30 hops) traffic",
 420         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 421         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 422     ],
 423     'VNC' => [
 424         "VNC traffic for VNC display's 0 - 9",
 425         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 426     ],
 427     'VNCL' => [
 428         "VNC traffic from Vncservers to Vncviewers in listen mode",
 429         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 430     ],
 431     'Web' => [
 432         "WWW traffic (HTTP and HTTPS)",
 433         { action => 'PARAM', proto => 'tcp', dport => '80' },
 434         { action => 'PARAM', proto => 'tcp', dport => '443' },
 435     ],
 436     'Webcache' => [
 437         "Web Cache/Proxy traffic (port 8080)",
 438         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 439     ],
 440     'Webmin' => [
 441         "Webmin traffic",
 442         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 443     ],
 444     'Whois' => [
 445         "Whois (nicname, RFC 3912) traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '43' },
 447     ],
 448 };
 449
 450 my $pve_fw_parsed_macros;
 451 my $pve_fw_macro_descr;
 452 my $pve_fw_preferred_macro_names = {};
 453
 454 my $pve_std_chains = {
 455     'PVEFW-SET-ACCEPT-MARK' => [
 456         "-j MARK --set-mark 1",
 457     ],
 458     'PVEFW-DropBroadcast' => [
 459         # same as shorewall 'Broadcast'
 460         # simply DROP BROADCAST/MULTICAST/ANYCAST
 461         # we can use this to reduce logging
 462         { action => 'DROP', dsttype => 'BROADCAST' },
 463         { action => 'DROP', dsttype => 'MULTICAST' },
 464         { action => 'DROP', dsttype => 'ANYCAST' },
 465         { action => 'DROP', dest => '224.0.0.0/4' },
 466     ],
 467     'PVEFW-reject' => [
 468         # same as shorewall 'reject'
 469         { action => 'DROP', dsttype => 'BROADCAST' },
 470         { action => 'DROP', source => '224.0.0.0/4' },
 471         { action => 'DROP', proto => 'icmp' },
 472         "-p tcp -j REJECT --reject-with tcp-reset",
 473         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 474         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 475         "-j REJECT --reject-with icmp-host-prohibited",
 476     ],
 477     'PVEFW-Drop' => [
 478         # same as shorewall 'Drop', which is equal to DROP,
 479         # but REJECT/DROP some packages to reduce logging,
 480         # and ACCEPT critical ICMP types
 481         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 482         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 483         { action => 'PVEFW-DropBroadcast' },
 484         # ACCEPT critical ICMP types
 485         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 486         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 487         # Drop packets with INVALID state
 488         "-m conntrack --ctstate INVALID -j DROP",
 489         # Drop Microsoft SMB noise
 490         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 491         { action => 'DROP', proto => 'udp', dport => '137:139'},
 492         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 493         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 494         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 495         # Drop new/NotSyn traffic so that it doesn't get logged
 496         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 497         # Drop DNS replies
 498         { action => 'DROP', proto => 'udp', sport => 53 },
 499     ],
 500     'PVEFW-Reject' => [
 501         # same as shorewall 'Reject', which is equal to Reject,
 502         # but REJECT/DROP some packages to reduce logging,
 503         # and ACCEPT critical ICMP types
 504         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 505         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 506         { action => 'PVEFW-DropBroadcast' },
 507         # ACCEPT critical ICMP types
 508         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 509         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 510         # Drop packets with INVALID state
 511         "-m conntrack --ctstate INVALID -j DROP",
 512         # Drop Microsoft SMB noise
 513         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 514         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 515         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 516         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 517         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 518         # Drop new/NotSyn traffic so that it doesn't get logged
 519         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 520         # Drop DNS replies
 521         { action => 'DROP', proto => 'udp', sport => 53 },
 522     ],
 523     'PVEFW-tcpflags' => [
 524         # same as shorewall tcpflags action.
 525         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 526         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 527         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 528         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 529         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 530         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 531     ],
 532     'PVEFW-smurfs' => [
 533         # same as shorewall smurfs action
 534         # Filter packets for smurfs (packets with a broadcast address as the source).
 535         "-s 0.0.0.0/32 -j RETURN",
 536         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 537         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 538     ],
 539 };
 540
 541 # iptables -p icmp -h
 542 my $icmp_type_names = {
 543     any => 1,
 544     'echo-reply' => 1,
 545     'destination-unreachable' => 1,
 546     'network-unreachable' => 1,
 547     'host-unreachable' => 1,
 548     'protocol-unreachable' => 1,
 549     'port-unreachable' => 1,
 550     'fragmentation-needed' => 1,
 551     'source-route-failed' => 1,
 552     'network-unknown' => 1,
 553     'host-unknown' => 1,
 554     'network-prohibited' => 1,
 555     'host-prohibited' => 1,
 556     'TOS-network-unreachable' => 1,
 557     'TOS-host-unreachable' => 1,
 558     'communication-prohibited' => 1,
 559     'host-precedence-violation' => 1,
 560     'precedence-cutoff' => 1,
 561     'source-quench' => 1,
 562     'redirect' => 1,
 563     'network-redirect' => 1,
 564     'host-redirect' => 1,
 565     'TOS-network-redirect' => 1,
 566     'TOS-host-redirect' => 1,
 567     'echo-request' => 1,
 568     'router-advertisement' => 1,
 569     'router-solicitation' => 1,
 570     'time-exceeded' => 1,
 571     'ttl-zero-during-transit' => 1,
 572     'ttl-zero-during-reassembly' => 1,
 573     'parameter-problem' => 1,
 574     'ip-header-bad' => 1,
 575     'required-option-missing' => 1,
 576     'timestamp-request' => 1,
 577     'timestamp-reply' => 1,
 578     'address-mask-request' => 1,
 579     'address-mask-reply' => 1,
 580 };
 581
 582 sub init_firewall_macros {
 583
 584     $pve_fw_parsed_macros = {};
 585
 586     foreach my $k (keys %$pve_fw_macros) {
 587         my $lc_name = lc($k);
 588         my $macro = $pve_fw_macros->{$k};
 589         if (!ref($macro->[0])) {
 590             $pve_fw_macro_descr->{$k} = shift @$macro;
 591         }
 592         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 593         $pve_fw_parsed_macros->{$k} = $macro;
 594     }
 595 }
 596
 597 init_firewall_macros();
 598
 599 sub get_macros {
 600     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 601 }
 602
 603 my $etc_services;
 604
 605 sub get_etc_services {
 606
 607     return $etc_services if $etc_services;
 608
 609     my $filename = "/etc/services";
 610
 611     my $fh = IO::File->new($filename, O_RDONLY);
 612     if (!$fh) {
 613         warn "unable to read '$filename' - $!\n";
 614         return {};
 615     }
 616
 617     my $services = {};
 618
 619     while (my $line = <$fh>) {
 620         chomp ($line);
 621         next if $line =~m/^#/;
 622         next if ($line =~m/^\s*$/);
 623
 624         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 625             $services->{byid}->{$2}->{name} = $1;
 626             $services->{byid}->{$2}->{port} = $2;
 627             $services->{byid}->{$2}->{$3} = 1;
 628             $services->{byname}->{$1} = $services->{byid}->{$2};
 629         }
 630     }
 631
 632     close($fh);
 633
 634     $etc_services = $services;
 635
 636
 637     return $etc_services;
 638 }
 639
 640 my $etc_protocols;
 641
 642 sub get_etc_protocols {
 643     return $etc_protocols if $etc_protocols;
 644
 645     my $filename = "/etc/protocols";
 646
 647     my $fh = IO::File->new($filename, O_RDONLY);
 648     if (!$fh) {
 649         warn "unable to read '$filename' - $!\n";
 650         return {};
 651     }
 652
 653     my $protocols = {};
 654
 655     while (my $line = <$fh>) {
 656         chomp ($line);
 657         next if $line =~m/^#/;
 658         next if ($line =~m/^\s*$/);
 659
 660         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 661             $protocols->{byid}->{$2}->{name} = $1;
 662             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 663         }
 664     }
 665
 666     close($fh);
 667
 668     $etc_protocols = $protocols;
 669
 670     return $etc_protocols;
 671 }
 672
 673 sub parse_address_list {
 674     my ($str) = @_;
 675
 676     return if $str !~ m/^(\+)(\S+)$/; # ipset ref
 677
 678     my $count = 0;
 679     my $iprange = 0;
 680     foreach my $elem (split(/,/, $str)) {
 681         $count++;
 682         if (!Net::IP->new($elem)) {
 683             my $err = Net::IP::Error();
 684             die "invalid IP address: $err\n";
 685         }
 686         $iprange = 1 if $elem =~ m/-/;
 687     }
 688
 689     die "you can use a range in a list\n" if $iprange && $count > 1;
 690 }
 691
 692 sub parse_port_name_number_or_range {
 693     my ($str) = @_;
 694
 695     my $services = PVE::Firewall::get_etc_services();
 696     my $count = 0;
 697     foreach my $item (split(/,/, $str)) {
 698         $count++;
 699         if ($item =~ m/^(\d+):(\d+)$/) {
 700             my ($port1, $port2) = ($1, $2);
 701             die "invalid port '$port1'\n" if $port1 > 65535;
 702             die "invalid port '$port2'\n" if $port2 > 65535;
 703         } elsif ($item =~ m/^(\d+)$/) {
 704             my $port = $1;
 705             die "invalid port '$port'\n" if $port > 65535;
 706         } else {
 707             die "invalid port '$item'\n" if !$services->{byname}->{$item};
 708         }
 709     }
 710
 711     return $count;
 712 }
 713
 714 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 715 sub pve_fw_verify_port_spec {
 716    my ($portstr) = @_;
 717
 718    parse_port_name_number_or_range($portstr);
 719
 720    return $portstr;
 721 }
 722
 723 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 724 sub pve_fw_verify_v4addr_spec {
 725    my ($list) = @_;
 726
 727    parse_address_list($list);
 728
 729    return $list;
 730 }
 731
 732 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 733 sub pve_fw_verify_protocol_spec {
 734    my ($proto) = @_;
 735
 736    my $protocols = get_etc_protocols();
 737
 738    die "unknown protocol '$proto'\n" if $proto &&
 739        !(defined($protocols->{byname}->{$proto}) ||
 740          defined($protocols->{byid}->{$proto}));
 741
 742    return $proto;
 743 }
 744
 745
 746 # helper function for API
 747
 748 my $rule_properties = {
 749     pos => {
 750         description => "Update rule at position <pos>.",
 751         type => 'integer',
 752         minimum => 0,
 753         optional => 1,
 754     },
 755     digest => {
 756         type => 'string',
 757         optional => 1,
 758         maxLength => 27,
 759         minLength => 27,
 760     },
 761     type => {
 762         type => 'string',
 763         optional => 1,
 764         enum => ['in', 'out', 'group'],
 765     },
 766     action => {
 767         type => 'string',
 768         optional => 1,
 769         enum => ['ACCEPT', 'DROP', 'REJECT'],
 770     },
 771     macro => {
 772         type => 'string',
 773         optional => 1,
 774         maxLength => 128,
 775     },
 776     iface => get_standard_option('pve-iface', { optional => 1 }),
 777     source => {
 778         type => 'string', format => 'pve-fw-v4addr-spec',
 779         optional => 1,
 780     },
 781     dest => {
 782         type => 'string', format => 'pve-fw-v4addr-spec',
 783         optional => 1,
 784     },
 785     proto => {
 786         type => 'string', format => 'pve-fw-protocol-spec',
 787         optional => 1,
 788     },
 789     enable => {
 790         type => 'boolean',
 791         optional => 1,
 792     },
 793     sport => {
 794         type => 'string', format => 'pve-fw-port-spec',
 795         optional => 1,
 796     },
 797     dport => {
 798         type => 'string', format => 'pve-fw-port-spec',
 799         optional => 1,
 800     },
 801     comment => {
 802         type => 'string',
 803         optional => 1,
 804     },
 805 };
 806
 807 sub cleanup_fw_rule {
 808     my ($rule, $digest, $pos) = @_;
 809
 810     my $r = {};
 811
 812     foreach my $k (keys %$rule) {
 813         next if !$rule_properties->{$k};
 814         my $v = $rule->{$k};
 815         next if !defined($v);
 816         $r->{$k} = $v;
 817         $r->{digest} = $digest;
 818         $r->{pos} = $pos;
 819     }
 820
 821     return $r;
 822 }
 823
 824 sub add_rule_properties {
 825     my ($properties) = @_;
 826
 827     foreach my $k (keys %$rule_properties) {
 828         my $h = $rule_properties->{$k};
 829         # copy data, so that we can modify later without side effects
 830         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 831     }
 832
 833     return $properties;
 834 }
 835
 836 sub delete_rule_properties {
 837     my ($rule, $delete_str) = @_;
 838
 839     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 840         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 841             if !defined($rule_properties->{$opt});
 842         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 843             if $opt eq 'type' || $opt eq 'action';
 844         delete $rule->{$opt};
 845     }
 846
 847     return $rule;
 848 }
 849
 850 my $apply_macro = sub {
 851     my ($macro_name, $param, $verify) = @_;
 852
 853     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 854     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 855
 856     my $rules = [];
 857
 858     foreach my $templ (@$macro_rules) {
 859         my $rule = {};
 860         my $param_used = {};
 861         foreach my $k (keys %$templ) {
 862             my $v = $templ->{$k};
 863             if ($v eq 'PARAM') {
 864                 $v = $param->{$k};
 865                 $param_used->{$k} = 1;
 866             } elsif ($v eq 'DEST') {
 867                 $v = $param->{dest};
 868                 $param_used->{dest} = 1;
 869             } elsif ($v eq 'SOURCE') {
 870                 $v = $param->{source};
 871                 $param_used->{source} = 1;
 872             }
 873
 874             if (!defined($v)) {
 875                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 876                 raise_param_exc({ macro => $msg }) if $verify;
 877                 die "$msg\n";
 878             }
 879             $rule->{$k} = $v;
 880         }
 881         foreach my $k (keys %$param) {
 882             next if $k eq 'macro';
 883             next if !defined($param->{$k});
 884             next if $param_used->{$k};
 885             if (defined($rule->{$k})) {
 886                 if ($rule->{$k} ne $param->{$k}) {
 887                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 888                     raise_param_exc({ $k => $msg }) if $verify;
 889                     die "$msg\n";
 890                 }
 891             } else {
 892                 $rule->{$k} = $param->{$k};
 893             }
 894         }
 895         push @$rules, $rule;
 896     }
 897
 898     return $rules;
 899 };
 900
 901 sub verify_rule {
 902     my ($rule, $allow_groups) = @_;
 903
 904     my $type = $rule->{type};
 905
 906     raise_param_exc({ type => "missing property"}) if !$type;
 907     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 908
 909     if ($type eq  'in' || $type eq 'out') {
 910         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 911             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 912     } elsif ($type eq 'group') {
 913         raise_param_exc({ type => "security groups not allowed"})
 914             if !$allow_groups;
 915         raise_param_exc({ action => "invalid characters in security group name"})
 916             if $rule->{action} !~ m/^[A-Za-z0-9_\-]+$/;
 917     } else {
 918         raise_param_exc({ type => "unknown rule type '$type'"});
 919     }
 920
 921     # fixme: verify $rule->{iface}?
 922
 923     if ($rule->{macro}) {
 924         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 925         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 926         $rule->{macro} = $preferred_name;
 927     }
 928
 929     if ($rule->{dport}) {
 930         eval { parse_port_name_number_or_range($rule->{dport}); };
 931         raise_param_exc({ dport => $@ }) if $@;
 932     }
 933
 934     if ($rule->{sport}) {
 935         eval { parse_port_name_number_or_range($rule->{sport}); };
 936         raise_param_exc({ sport => $@ }) if $@;
 937     }
 938
 939     if ($rule->{source}) {
 940         eval { parse_address_list($rule->{source}); };
 941         raise_param_exc({ source => $@ }) if $@;
 942     }
 943
 944     if ($rule->{dest}) {
 945         eval { parse_address_list($rule->{dest}); };
 946         raise_param_exc({ dest => $@ }) if $@;
 947     }
 948
 949     if ($rule->{macro}) {
 950         &$apply_macro($rule->{macro}, $rule, 1);
 951     }
 952
 953     return $rule;
 954 }
 955
 956 sub copy_rule_data {
 957     my ($rule, $param) = @_;
 958
 959     foreach my $k (keys %$rule_properties) {
 960         if (defined(my $v = $param->{$k})) {
 961             if ($v eq '' || $v eq '-') {
 962                 delete $rule->{$k};
 963             } else {
 964                 $rule->{$k} = $v;
 965             }
 966         } else {
 967             delete $rule->{$k};
 968         }
 969     }
 970
 971     # verify rule now
 972
 973     return $rule;
 974 }
 975
 976 # core functions
 977 my $bridge_firewall_enabled = 0;
 978
 979 sub enable_bridge_firewall {
 980
 981     return if $bridge_firewall_enabled; # only once
 982
 983     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
 984     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
 985
 986     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
 987     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
 988
 989     $bridge_firewall_enabled = 1;
 990 }
 991
 992 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 993
 994 sub iptables_restore_cmdlist {
 995     my ($cmdlist) = @_;
 996
 997     run_command("/sbin/iptables-restore -n", input => $cmdlist);
 998 }
 999
1000 sub ipset_restore_cmdlist {
1001     my ($cmdlist) = @_;
1002
1003     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1004 }
1005
1006 sub iptables_get_chains {
1007
1008     my $res = {};
1009
1010     # check what chains we want to track
1011     my $is_pvefw_chain = sub {
1012         my $name = shift;
1013
1014         return 1 if $name =~ m/^PVEFW-\S+$/;
1015
1016         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1017
1018         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1019
1020         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1021
1022         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1023         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1024
1025         return undef;
1026     };
1027
1028     my $table = '';
1029
1030     my $hooks = {};
1031
1032     my $parser = sub {
1033         my $line = shift;
1034
1035         return if $line =~ m/^#/;
1036         return if $line =~ m/^\s*$/;
1037
1038         if ($line =~ m/^\*(\S+)$/) {
1039             $table = $1;
1040             return;
1041         }
1042
1043         return if $table ne 'filter';
1044
1045         if ($line =~ m/^:(\S+)\s/) {
1046             my $chain = $1;
1047             return if !&$is_pvefw_chain($chain);
1048             $res->{$chain} = "unknown";
1049         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1050             my ($chain, $sig) = ($1, $2);
1051             return if !&$is_pvefw_chain($chain);
1052             $res->{$chain} = $sig;
1053         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1054             $hooks->{$1} = 1;
1055         } else {
1056             # simply ignore the rest
1057             return;
1058         }
1059     };
1060
1061     run_command("/sbin/iptables-save", outfunc => $parser);
1062
1063     return wantarray ? ($res, $hooks) : $res;
1064 }
1065
1066 sub iptables_chain_digest {
1067     my ($rules) = @_;
1068     my $digest = Digest::SHA->new('sha1');
1069     foreach my $rule (@$rules) { # order is important
1070         $digest->add($rule);
1071     }
1072     return $digest->b64digest;
1073 }
1074
1075 sub ipset_chain_digest {
1076     my ($rules) = @_;
1077
1078     my $digest = Digest::SHA->new('sha1');
1079     foreach my $rule (sort @$rules) { # note: sorted
1080         $digest->add($rule);
1081     }
1082     return $digest->b64digest;
1083 }
1084
1085 sub ipset_get_chains {
1086
1087     my $res = {};
1088     my $chains = {};
1089
1090     my $parser = sub {
1091         my $line = shift;
1092
1093         return if $line =~ m/^#/;
1094         return if $line =~ m/^\s*$/;
1095         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1096             my $chain = $1;
1097             $line =~ s/\s+$//; # delete trailing white space
1098             push @{$chains->{$chain}}, $line;
1099         } else {
1100             # simply ignore the rest
1101             return;
1102         }
1103     };
1104
1105     run_command("/usr/sbin/ipset save", outfunc => $parser);
1106
1107     # compute digest for each chain
1108     foreach my $chain (keys %$chains) {
1109         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1110     }
1111
1112     return $res;
1113 }
1114
1115 sub ruleset_generate_cmdstr {
1116     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1117
1118     return if defined($rule->{enable}) && !$rule->{enable};
1119
1120     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1121
1122     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1123     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1124
1125     my @cmd = ();
1126
1127     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1128     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1129
1130     my $source = $rule->{source};
1131     my $dest = $rule->{dest};
1132
1133     if ($source) {
1134         if ($source =~ m/^(\+)(\S+)$/) {
1135             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1136             push @cmd, "-m set --match-set PVEFW-$2 src";
1137
1138         } elsif ($source =~ m/\-/){
1139             push @cmd, "-m iprange --src-range $source";
1140
1141         } else {
1142             push @cmd, "-s $source";
1143         }
1144     }
1145
1146     if ($dest) {
1147         if ($dest =~ m/^(\+)(\S+)$/) {
1148             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1149             push @cmd, "-m set --match-set PVEFW-$2 dst";
1150
1151         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1152             push @cmd, "-m iprange --dst-range $dest";
1153
1154         } else {
1155             push @cmd, "-s $dest";
1156         }
1157     }
1158
1159     if ($rule->{proto}) {
1160         push @cmd, "-p $rule->{proto}";
1161
1162         my $multiport = 0;
1163         $multiport++ if $nbdport > 1;
1164         $multiport++ if $nbsport > 1;
1165
1166         push @cmd, "--match multiport" if $multiport;
1167
1168         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1169             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1170
1171         if ($rule->{dport}) {
1172             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1173                 # Note: we use dport to store --icmp-type
1174                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1175                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1176             } else {
1177                 if ($nbdport > 1) {
1178                     if ($multiport == 2) {
1179                         push @cmd,  "--ports $rule->{dport}";
1180                     } else {
1181                         push @cmd, "--dports $rule->{dport}";
1182                     }
1183                 } else {
1184                     push @cmd, "--dport $rule->{dport}";
1185                 }
1186             }
1187         }
1188
1189         if ($rule->{sport}) {
1190             if ($nbsport > 1) {
1191                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1192             } else {
1193                 push @cmd, "--sport $rule->{sport}";
1194             }
1195         }
1196     } elsif ($rule->{dport} || $rule->{sport}) {
1197         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1198         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1199     }
1200
1201     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1202
1203     if (my $action = $rule->{action}) {
1204         $action = $actions->{$action} if defined($actions->{$action});
1205         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1206         push @cmd, $goto ? "-g $action" : "-j $action";
1207     }
1208
1209     return scalar(@cmd) ? join(' ', @cmd) : undef;
1210 }
1211
1212 sub ruleset_generate_rule {
1213     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1214
1215     my $rules;
1216
1217     if ($rule->{macro}) {
1218         $rules = &$apply_macro($rule->{macro}, $rule);
1219     } else {
1220         $rules = [ $rule ];
1221     }
1222
1223     foreach my $tmp (@$rules) {
1224         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1225             ruleset_addrule($ruleset, $chain, $cmdstr);
1226         }
1227     }
1228 }
1229
1230 sub ruleset_generate_rule_insert {
1231     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1232
1233     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1234
1235     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1236         ruleset_insertrule($ruleset, $chain, $cmdstr);
1237     }
1238 }
1239
1240 sub ruleset_create_chain {
1241     my ($ruleset, $chain) = @_;
1242
1243     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1244     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1245
1246     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1247
1248     $ruleset->{$chain} = [];
1249 }
1250
1251 sub ruleset_chain_exist {
1252     my ($ruleset, $chain) = @_;
1253
1254     return $ruleset->{$chain} ? 1 : undef;
1255 }
1256
1257 sub ruleset_addrule {
1258    my ($ruleset, $chain, $rule) = @_;
1259
1260    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1261
1262    push @{$ruleset->{$chain}}, "-A $chain $rule";
1263 }
1264
1265 sub ruleset_insertrule {
1266    my ($ruleset, $chain, $rule) = @_;
1267
1268    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1269
1270    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1271 }
1272
1273 sub get_log_rule_base {
1274     my ($chain, $vmid, $msg, $loglevel) = @_;
1275
1276     die "internal error - no log level" if !defined($loglevel);
1277
1278     $vmid = 0 if !defined($vmid);
1279
1280     # Note: we use special format for prefix to pass further
1281     # info to log daemon (VMID, LOGVELEL and CHAIN)
1282
1283     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1284 }
1285
1286 sub ruleset_addlog {
1287     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1288
1289     return if !defined($loglevel);
1290
1291     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1292
1293     $logrule = "$rule $logrule" if defined($rule);
1294
1295     ruleset_addrule($ruleset, $chain, $logrule)
1296 }
1297
1298 sub generate_bridge_chains {
1299     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1300
1301     my $options = $hostfw_conf->{options} || {};
1302
1303     die "error: detected direct route to bridge '$bridge'\n"
1304         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1305
1306     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1307         ruleset_create_chain($ruleset, "$bridge-FW");
1308         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1309         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1310     }
1311
1312     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1313         ruleset_create_chain($ruleset, "$bridge-OUT");
1314         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1315         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1316     }
1317
1318     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1319         ruleset_create_chain($ruleset, "$bridge-IN");
1320         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1321         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1322         # accept traffic to unmanaged bridge ports
1323         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1324     }
1325 }
1326
1327 sub ruleset_add_chain_policy {
1328     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1329
1330     if ($policy eq 'ACCEPT') {
1331
1332         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1333                               { ACCEPT =>  $accept_action});
1334
1335     } elsif ($policy eq 'DROP') {
1336
1337         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1338
1339         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1340
1341         ruleset_addrule($ruleset, $chain, "-j DROP");
1342     } elsif ($policy eq 'REJECT') {
1343         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1344
1345         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1346
1347         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1348     } else {
1349         # should not happen
1350         die "internal error: unknown policy '$policy'";
1351     }
1352 }
1353
1354 sub ruleset_create_vm_chain {
1355     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1356
1357     ruleset_create_chain($ruleset, $chain);
1358     my $accept = generate_nfqueue($options);
1359
1360     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1361         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1362     }
1363
1364     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1365         if ($direction eq 'OUT') {
1366             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1367                                                       proto => 'udp', sport => 68, dport => 67 });
1368         } else {
1369             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1370                                                       proto => 'udp', sport => 67, dport => 68 });
1371         }
1372     }
1373
1374     if ($options->{tcpflags}) {
1375         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1376     }
1377
1378     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1379     if ($direction eq 'OUT') {
1380         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1381     } else {
1382         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1383     }
1384
1385     if ($direction eq 'OUT') {
1386         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1387             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1388         }
1389         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1390     }
1391 }
1392
1393 sub ruleset_generate_vm_rules {
1394     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1395
1396     my $lc_direction = lc($direction);
1397
1398     foreach my $rule (@$rules) {
1399         next if $rule->{iface} && $rule->{iface} ne $netid;
1400         next if !$rule->{enable};
1401         if ($rule->{type} eq 'group') {
1402             my $group_chain = "GROUP-$rule->{action}-$direction";
1403             if(!ruleset_chain_exist($ruleset, $group_chain)){
1404                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1405             }
1406             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1407             if ($direction eq 'OUT'){
1408                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1409             }else{
1410                 my $accept = generate_nfqueue($options);
1411                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1412             }
1413
1414         } else {
1415             next if $rule->{type} ne $lc_direction;
1416             if ($direction eq 'OUT') {
1417                 ruleset_generate_rule($ruleset, $chain, $rule,
1418                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1419             } else {
1420                 my $accept = generate_nfqueue($options);
1421                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1422             }
1423         }
1424     }
1425 }
1426
1427 sub generate_nfqueue {
1428     my ($options) = @_;
1429
1430     my $action = "";
1431     if($options->{ips}){
1432         $action = "NFQUEUE";
1433         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1434             if(defined($3) && defined($1)) {
1435                 $action .= " --queue-balance $1:$3";
1436             }elsif (defined($1)) {
1437                 $action .= " --queue-num $1";
1438             }
1439         }
1440         $action .= " --queue-bypass";
1441     }else{
1442         $action = "ACCEPT";
1443     }
1444
1445     return $action;
1446 }
1447
1448 sub ruleset_generate_vm_ipsrules {
1449     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1450
1451     if ($options->{ips} && $direction eq 'IN') {
1452         my $nfqueue = generate_nfqueue($options);
1453
1454         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1455             ruleset_create_chain($ruleset, "PVEFW-IPS");
1456         }
1457
1458         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1459             ruleset_create_chain($ruleset, "$bridge-IPS");
1460             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1461         }
1462
1463         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1464     }
1465 }
1466
1467 sub generate_venet_rules_direction {
1468     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1469
1470     parse_address_list($ip); # make sure we have a valid $ip list
1471
1472     my $lc_direction = lc($direction);
1473
1474     my $rules = $vmfw_conf->{rules};
1475
1476     my $options = $vmfw_conf->{options};
1477     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1478
1479     my $chain = "venet0-$vmid-$direction";
1480
1481     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1482
1483     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1484
1485     # implement policy
1486     my $policy;
1487
1488     if ($direction eq 'OUT') {
1489         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1490     } else {
1491         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1492     }
1493
1494     my $accept = generate_nfqueue($options);
1495     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1496     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1497
1498     # plug into FORWARD, INPUT and OUTPUT chain
1499     if ($direction eq 'OUT') {
1500         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1501             action => $chain,
1502             source => $ip,
1503             iface_in => 'venet0'});
1504
1505         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1506             action => $chain,
1507             source => $ip,
1508             iface_in => 'venet0'});
1509     } else {
1510         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1511             action => $chain,
1512             dest => $ip,
1513             iface_out => 'venet0'});
1514
1515         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1516             action => $chain,
1517             dest => $ip,
1518             iface_out => 'venet0'});
1519     }
1520 }
1521
1522 sub generate_tap_rules_direction {
1523     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1524
1525     my $lc_direction = lc($direction);
1526
1527     my $rules = $vmfw_conf->{rules};
1528
1529     my $options = $vmfw_conf->{options};
1530     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1531
1532     my $tapchain = "$iface-$direction";
1533
1534     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1535
1536     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1537
1538     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1539
1540     # implement policy
1541     my $policy;
1542
1543     if ($direction eq 'OUT') {
1544         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1545     } else {
1546         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1547     }
1548
1549     my $accept = generate_nfqueue($options);
1550     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1551     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1552
1553     # plug the tap chain to bridge chain
1554     if ($direction eq 'IN') {
1555         ruleset_insertrule($ruleset, "$bridge-IN",
1556                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1557     } else {
1558         ruleset_insertrule($ruleset, "$bridge-OUT",
1559                            "-m physdev --physdev-in $iface -j $tapchain");
1560     }
1561 }
1562
1563 sub enable_host_firewall {
1564     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1565
1566     # fixme: allow security groups
1567
1568     my $options = $hostfw_conf->{options};
1569     my $rules = $hostfw_conf->{rules};
1570
1571     # host inbound firewall
1572     my $chain = "PVEFW-HOST-IN";
1573     ruleset_create_chain($ruleset, $chain);
1574
1575     my $loglevel = get_option_log_level($options, "log_level_in");
1576
1577     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1578         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1579     }
1580
1581     if ($options->{tcpflags}) {
1582         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1583     }
1584
1585     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1586     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1587     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1588     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1589     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1590     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1591
1592     # we use RETURN because we need to check also tap rules
1593     my $accept_action = 'RETURN';
1594
1595     foreach my $rule (@$rules) {
1596         next if $rule->{type} ne 'in';
1597         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1598     }
1599
1600     # implement input policy
1601     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1602     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1603
1604     # host outbound firewall
1605     $chain = "PVEFW-HOST-OUT";
1606     ruleset_create_chain($ruleset, $chain);
1607
1608     $loglevel = get_option_log_level($options, "log_level_out");
1609
1610     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1611     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1612     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1613     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1614     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1615     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1616
1617     # we use RETURN because we may want to check other thigs later
1618     $accept_action = 'RETURN';
1619
1620     foreach my $rule (@$rules) {
1621         next if $rule->{type} ne 'out';
1622         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1623     }
1624
1625     # implement output policy
1626     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1627     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1628
1629     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1630     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1631 }
1632
1633 sub generate_group_rules {
1634     my ($ruleset, $cluster_conf, $group) = @_;
1635     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1636
1637     my $rules = $cluster_conf->{groups}->{$group};
1638
1639     my $chain = "GROUP-${group}-IN";
1640
1641     ruleset_create_chain($ruleset, $chain);
1642     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1643
1644     foreach my $rule (@$rules) {
1645         next if $rule->{type} ne 'in';
1646         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1647     }
1648
1649     $chain = "GROUP-${group}-OUT";
1650
1651     ruleset_create_chain($ruleset, $chain);
1652     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1653
1654     foreach my $rule (@$rules) {
1655         next if $rule->{type} ne 'out';
1656         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1657         # check also other tap rules later
1658         ruleset_generate_rule($ruleset, $chain, $rule,
1659                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1660     }
1661 }
1662
1663 my $MAX_NETS = 32;
1664 my $valid_netdev_names = {};
1665 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1666     $valid_netdev_names->{"net$i"} = 1;
1667 }
1668
1669 sub parse_fw_rule {
1670     my ($line, $need_iface, $allow_groups) = @_;
1671
1672     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1673
1674     # we can add single line comments to the end of the rule
1675     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1676
1677     # we can disable a rule when prefixed with '|'
1678     my $enable = 1;
1679
1680     $enable = 0 if $line =~ s/^\|//;
1681
1682     my @data = split(/\s+/, $line);
1683     my $expected_elements = $need_iface ? 8 : 7;
1684
1685     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1686
1687     if ($need_iface) {
1688         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1689     } else {
1690         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1691     }
1692
1693     die "incomplete rule\n" if ! ($type && $action);
1694
1695     my $macro;
1696
1697     $type = lc($type);
1698
1699     if ($type eq  'in' || $type eq 'out') {
1700         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1701             # OK
1702         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1703             $action = $2;
1704             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1705             die "unknown macro '$1'\n" if !$preferred_name;
1706             $macro = $preferred_name;
1707         } else {
1708             die "unknown action '$action'\n";
1709         }
1710     } elsif ($type eq 'group') {
1711         die "wrong number of rule elements\n" if scalar(@data) != 3;
1712         die "groups disabled\n" if !$allow_groups;
1713
1714         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1715     } else {
1716         die "unknown rule type '$type'\n";
1717     }
1718
1719     if ($need_iface) {
1720         $iface = undef if $iface && $iface eq '-';
1721     }
1722
1723     $proto = undef if $proto && $proto eq '-';
1724     pve_fw_verify_protocol_spec($proto) if $proto;
1725
1726     $source = undef if $source && $source eq '-';
1727     $dest = undef if $dest && $dest eq '-';
1728
1729     $dport = undef if $dport && $dport eq '-';
1730     $sport = undef if $sport && $sport eq '-';
1731
1732     parse_port_name_number_or_range($dport) if defined($dport);
1733     parse_port_name_number_or_range($sport) if defined($sport);
1734
1735     parse_address_list($source) if $source;
1736     parse_address_list($dest) if $dest;
1737
1738     return {
1739         type => $type,
1740         enable => $enable,
1741         comment => $comment,
1742         action => $action,
1743         macro => $macro,
1744         iface => $iface,
1745         source => $source,
1746         dest => $dest,
1747         proto => $proto,
1748         dport => $dport,
1749         sport => $sport,
1750     };
1751 }
1752
1753 sub parse_vmfw_option {
1754     my ($line) = @_;
1755
1756     my ($opt, $value);
1757
1758     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1759
1760     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1761         $opt = lc($1);
1762         $value = int($2);
1763     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1764         $opt = lc($1);
1765         $value = $2 ? lc($3) : '';
1766     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1767         $opt = lc($1);
1768         $value = uc($3);
1769     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1770         $opt = lc($1);
1771         $value = $2;
1772     } else {
1773         chomp $line;
1774         die "can't parse option '$line'\n"
1775     }
1776
1777     return ($opt, $value);
1778 }
1779
1780 sub parse_hostfw_option {
1781     my ($line) = @_;
1782
1783     my ($opt, $value);
1784
1785     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1786
1787     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1788         $opt = lc($1);
1789         $value = int($2);
1790     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1791         $opt = lc($1);
1792         $value = $2 ? lc($3) : '';
1793     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1794         $opt = lc($1);
1795         $value = uc($3);
1796     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1797         $opt = lc($1);
1798         $value = int($2);
1799     } else {
1800         chomp $line;
1801         die "can't parse option '$line'\n"
1802     }
1803
1804     return ($opt, $value);
1805 }
1806
1807 sub parse_clusterfw_option {
1808     my ($line) = @_;
1809
1810     my ($opt, $value);
1811
1812     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1813         $opt = lc($1);
1814         $value = int($2);
1815     } else {
1816         chomp $line;
1817         die "can't parse option '$line'\n"
1818     }
1819
1820     return ($opt, $value);
1821 }
1822
1823 sub parse_vm_fw_rules {
1824     my ($filename, $fh) = @_;
1825
1826     my $res = { rules => [], options => {}};
1827
1828     my $section;
1829
1830     my $digest = Digest::SHA->new('sha1');
1831
1832     while (defined(my $line = <$fh>)) {
1833         $digest->add($line);
1834
1835         next if $line =~ m/^#/;
1836         next if $line =~ m/^\s*$/;
1837
1838         my $linenr = $fh->input_line_number();
1839         my $prefix = "$filename (line $linenr)";
1840
1841         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1842             $section = lc($1);
1843             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1844             next;
1845         }
1846         if (!$section) {
1847             warn "$prefix: skip line - no section";
1848             next;
1849         }
1850
1851         next if !$res->{$section}; # skip undefined section
1852
1853         if ($section eq 'options') {
1854             eval {
1855                 my ($opt, $value) = parse_vmfw_option($line);
1856                 $res->{options}->{$opt} = $value;
1857             };
1858             warn "$prefix: $@" if $@;
1859             next;
1860         }
1861
1862         my $rule;
1863         eval { $rule = parse_fw_rule($line, 1, 1); };
1864         if (my $err = $@) {
1865             warn "$prefix: $err";
1866             next;
1867         }
1868
1869         push @{$res->{$section}}, $rule;
1870     }
1871
1872     $res->{digest} = $digest->b64digest;
1873
1874     return $res;
1875 }
1876
1877 sub parse_host_fw_rules {
1878     my ($filename, $fh) = @_;
1879
1880     my $res = { rules => [], options => {}};
1881
1882     my $section;
1883
1884     my $digest = Digest::SHA->new('sha1');
1885
1886     while (defined(my $line = <$fh>)) {
1887         $digest->add($line);
1888
1889         next if $line =~ m/^#/;
1890         next if $line =~ m/^\s*$/;
1891
1892         my $linenr = $fh->input_line_number();
1893         my $prefix = "$filename (line $linenr)";
1894
1895         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1896             $section = lc($1);
1897             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1898             next;
1899         }
1900         if (!$section) {
1901             warn "$prefix: skip line - no section";
1902             next;
1903         }
1904
1905         next if !$res->{$section}; # skip undefined section
1906
1907         if ($section eq 'options') {
1908             eval {
1909                 my ($opt, $value) = parse_hostfw_option($line);
1910                 $res->{options}->{$opt} = $value;
1911             };
1912             warn "$prefix: $@" if $@;
1913             next;
1914         }
1915
1916         my $rule;
1917         eval { $rule = parse_fw_rule($line, 1, 1); };
1918         if (my $err = $@) {
1919             warn "$prefix: $err";
1920             next;
1921         }
1922
1923         push @{$res->{$section}}, $rule;
1924     }
1925
1926 $res->{digest} = $digest->b64digest;
1927
1928     return $res;
1929 }
1930
1931 sub parse_cluster_fw_rules {
1932     my ($filename, $fh) = @_;
1933
1934     my $section;
1935     my $group;
1936
1937     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1938
1939     my $digest = Digest::SHA->new('sha1');
1940
1941     while (defined(my $line = <$fh>)) {
1942         $digest->add($line);
1943
1944         next if $line =~ m/^#/;
1945         next if $line =~ m/^\s*$/;
1946
1947         my $linenr = $fh->input_line_number();
1948         my $prefix = "$filename (line $linenr)";
1949
1950         if ($line =~ m/^\[options\]$/i) {
1951             $section = 'options';
1952             next;
1953         }
1954
1955         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1956             $section = 'groups';
1957             $group = lc($1);
1958             next;
1959         }
1960
1961         if ($line =~ m/^\[rules\]$/i) {
1962             $section = 'rules';
1963             next;
1964         }
1965
1966         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1967             $section = 'ipset';
1968             $group = lc($1);
1969             next;
1970         }
1971
1972         if (!$section) {
1973             warn "$prefix: skip line - no section\n";
1974             next;
1975         }
1976
1977         if ($section eq 'options') {
1978             eval {
1979                 my ($opt, $value) = parse_clusterfw_option($line);
1980                 $res->{options}->{$opt} = $value;
1981             };
1982             warn "$prefix: $@" if $@;
1983         } elsif ($section eq 'rules') {
1984             my $rule;
1985             eval { $rule = parse_fw_rule($line, 1, 1); };
1986             if (my $err = $@) {
1987                 warn "$prefix: $err";
1988                 next;
1989             }
1990             push @{$res->{$section}}, $rule;
1991         } elsif ($section eq 'groups') {
1992             my $rule;
1993             eval { $rule = parse_fw_rule($line, 0, 0); };
1994             if (my $err = $@) {
1995                 warn "$prefix: $err";
1996                 next;
1997             }
1998             push @{$res->{$section}->{$group}}, $rule;
1999         } elsif ($section eq 'ipset') {
2000             chomp $line;
2001             $line =~ m/^(\!)?\s*((\d+)\.(\d+)\.(\d+)\.(\d+)(\/(\d+))?)/;
2002             my $nomatch = $1;
2003         my $ip = $2;
2004
2005             if(!$ip){
2006                 warn "$prefix: $line is not an valid ip address\n";
2007                 next;
2008             }
2009             if (!Net::IP->new($ip)) {
2010                 warn "$prefix: $line is not an valid ip address\n";
2011                 next;
2012             }
2013
2014             if ($nomatch) {
2015                 if ($feature_ipset_nomatch) {
2016                     push @{$res->{$section}->{$group}}, "$ip nomatch";
2017                 } else {
2018                     warn "$prefix: ignore $line - nomatch not supported by kernel\n";
2019                 }
2020             } else {
2021                 push @{$res->{$section}->{$group}}, $ip;
2022             }
2023         }
2024     }
2025
2026     $res->{digest} = $digest->b64digest;
2027     return $res;
2028 }
2029
2030 sub run_locked {
2031     my ($code, @param) = @_;
2032
2033     my $timeout = 10;
2034
2035     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2036
2037     die $@ if $@;
2038
2039     return $res;
2040 }
2041
2042 sub read_local_vm_config {
2043
2044     my $openvz = {};
2045     my $qemu = {};
2046
2047     my $vmdata = { openvz => $openvz, qemu => $qemu };
2048
2049     my $vmlist = PVE::Cluster::get_vmlist();
2050     return $vmdata if !$vmlist || !$vmlist->{ids};
2051     my $ids = $vmlist->{ids};
2052
2053     foreach my $vmid (keys %$ids) {
2054         next if !$vmid; # skip VE0
2055         my $d = $ids->{$vmid};
2056         next if !$d->{node} || $d->{node} ne $nodename;
2057         next if !$d->{type};
2058         if ($d->{type} eq 'openvz') {
2059             if ($have_pve_manager) {
2060                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2061                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2062                     $openvz->{$vmid} = $conf;
2063                 }
2064             }
2065         } elsif ($d->{type} eq 'qemu') {
2066             if ($have_qemu_server) {
2067                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2068                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2069                     $qemu->{$vmid} = $conf;
2070                 }
2071             }
2072         }
2073     }
2074
2075     return $vmdata;
2076 };
2077
2078 sub load_vmfw_conf {
2079     my ($vmid) = @_;
2080
2081     my $vmfw_conf = {};
2082
2083     my $filename = "/etc/pve/firewall/$vmid.fw";
2084     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2085         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2086     }
2087
2088     return $vmfw_conf;
2089 }
2090
2091 my $format_rules = sub {
2092     my ($rules, $need_iface) = @_;
2093
2094     my $raw = '';
2095
2096     foreach my $rule (@$rules) {
2097         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2098             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2099             $raw .= uc($rule->{type});
2100             if ($rule->{macro}) {
2101                 $raw .= " $rule->{macro}($rule->{action})";
2102             } else {
2103                 $raw .= " " . $rule->{action};
2104             }
2105             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2106             $raw .= " " . ($rule->{source} || '-');
2107             $raw .= " " . ($rule->{dest} || '-');
2108             $raw .= " " . ($rule->{proto} || '-');
2109             $raw .= " " . ($rule->{dport} || '-');
2110             $raw .= " " . ($rule->{sport} || '-');
2111             $raw .= " # " . encode('utf8', $rule->{comment})
2112                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2113             $raw .= "\n";
2114         } else {
2115             die "implement me '$rule->{type}'";
2116         }
2117     }
2118
2119     return $raw;
2120 };
2121
2122 my $format_options = sub {
2123     my ($options) = @_;
2124
2125     my $raw = '';
2126
2127     $raw .= "[OPTIONS]\n\n";
2128     foreach my $opt (keys %$options) {
2129         $raw .= "$opt: $options->{$opt}\n";
2130     }
2131     $raw .= "\n";
2132
2133     return $raw;
2134 };
2135
2136 sub save_vmfw_conf {
2137     my ($vmid, $vmfw_conf) = @_;
2138
2139     my $raw = '';
2140
2141     my $options = $vmfw_conf->{options};
2142     $raw .= &$format_options($options) if scalar(keys %$options);
2143
2144     my $rules = $vmfw_conf->{rules};
2145     if (scalar(@$rules)) {
2146         $raw .= "[RULES]\n\n";
2147         $raw .= &$format_rules($rules, 1);
2148         $raw .= "\n";
2149     }
2150
2151     my $filename = "/etc/pve/firewall/$vmid.fw";
2152     PVE::Tools::file_set_contents($filename, $raw);
2153 }
2154
2155 sub read_vm_firewall_configs {
2156     my ($vmdata) = @_;
2157     my $vmfw_configs = {};
2158
2159     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2160         my $vmfw_conf = load_vmfw_conf($vmid);
2161         next if !$vmfw_conf->{options}; # skip if file does not exists
2162         $vmfw_configs->{$vmid} = $vmfw_conf;
2163     }
2164
2165     return $vmfw_configs;
2166 }
2167
2168 sub get_option_log_level {
2169     my ($options, $k) = @_;
2170
2171     my $v = $options->{$k};
2172     $v = $default_log_level if !defined($v);
2173
2174     return undef if $v eq '' || $v eq 'nolog';
2175
2176     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2177
2178     return $v if ($v >= 0) && ($v <= 7);
2179
2180     warn "unknown log level ($k = '$v')\n";
2181
2182     return undef;
2183 }
2184
2185 sub generate_std_chains {
2186     my ($ruleset, $options) = @_;
2187
2188     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2189
2190     # same as shorewall smurflog.
2191     my $chain = 'PVEFW-smurflog';
2192
2193     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2194     push @{$pve_std_chains->{$chain}}, "-j DROP";
2195
2196     # same as shorewall logflags action.
2197     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2198     $chain = 'PVEFW-logflags';
2199     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2200     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2201     push @{$pve_std_chains->{$chain}}, "-j DROP";
2202
2203     foreach my $chain (keys %$pve_std_chains) {
2204         ruleset_create_chain($ruleset, $chain);
2205         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2206             if (ref($rule)) {
2207                 ruleset_generate_rule($ruleset, $chain, $rule);
2208             } else {
2209                 ruleset_addrule($ruleset, $chain, $rule);
2210             }
2211         }
2212     }
2213 }
2214
2215 sub generate_ipset_chains {
2216     my ($ipset_ruleset, $fw_conf) = @_;
2217
2218     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2219         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2220     }
2221 }
2222
2223 sub generate_ipset {
2224     my ($ipset_ruleset, $name, $options) = @_;
2225
2226     my $hashsize = scalar(@$options);
2227     if ($hashsize <= 64) {
2228         $hashsize = 64;
2229     } else {
2230         $hashsize = round_powerof2($hashsize);
2231     }
2232
2233     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2234
2235     foreach my $ip (@$options) {
2236         push @{$ipset_ruleset->{$name}}, "add $name $ip";
2237     }
2238 }
2239
2240 sub round_powerof2 {
2241     my ($int) = @_;
2242
2243     $int--;
2244     $int |= $int >> $_ foreach (1,2,4,8,16);
2245     return ++$int;
2246 }
2247
2248 sub save_pvefw_status {
2249     my ($status) = @_;
2250
2251     die "unknown status '$status' - internal error"
2252         if $status !~ m/^(stopped|active)$/;
2253
2254     mkdir dirname($pve_fw_status_filename);
2255     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2256 }
2257
2258 sub read_pvefw_status {
2259
2260     my $status = 'unknown';
2261
2262     return 'stopped' if ! -f $pve_fw_status_filename;
2263
2264     eval {
2265         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2266     };
2267     warn $@ if $@;
2268
2269     return $status;
2270 }
2271
2272 # fixme: move to pve-common PVE::ProcFSTools
2273 sub read_proc_net_route {
2274     my $filename = "/proc/net/route";
2275
2276     my $res = {};
2277
2278     my $fh = IO::File->new ($filename, "r");
2279     return $res if !$fh;
2280
2281     my $int_to_quad = sub {
2282         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2283     };
2284
2285     while (defined(my $line = <$fh>)) {
2286         next if $line =~/^Iface\s+Destination/; # skip head
2287         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2288         push @{$res->{$iface}}, {
2289             dest => &$int_to_quad(hex($dest)),
2290             gateway => &$int_to_quad(hex($gateway)),
2291             mask => &$int_to_quad(hex($mask)),
2292             metric => $metric,
2293             mtu => $mtu,
2294         };
2295     }
2296
2297     return $res;
2298 }
2299
2300 sub load_clusterfw_conf {
2301
2302     my $cluster_conf = {};
2303      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2304         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2305     }
2306
2307     return $cluster_conf;
2308 }
2309
2310 sub save_clusterfw_conf {
2311     my ($cluster_conf) = @_;
2312
2313     my $raw = '';
2314
2315     my $options = $cluster_conf->{options};
2316     $raw .= &$format_options($options) if scalar(keys %$options);
2317
2318     # fixme: save ipset
2319
2320     my $rules = $cluster_conf->{rules};
2321     if (scalar(@$rules)) {
2322         $raw .= "[RULES]\n\n";
2323         $raw .= &$format_rules($rules, 1);
2324         $raw .= "\n";
2325     }
2326
2327     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2328         my $rules = $cluster_conf->{groups}->{$group};
2329         $raw .= "[group $group]\n\n";
2330         $raw .= &$format_rules($rules, 0);
2331         $raw .= "\n";
2332     }
2333
2334     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2335 }
2336
2337 sub load_hostfw_conf {
2338
2339     my $hostfw_conf = {};
2340     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2341         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2342     }
2343     return $hostfw_conf;
2344 }
2345
2346 sub save_hostfw_conf {
2347     my ($hostfw_conf) = @_;
2348
2349     my $raw = '';
2350
2351     my $options = $hostfw_conf->{options};
2352     $raw .= &$format_options($options) if scalar(keys %$options);
2353
2354     my $rules = $hostfw_conf->{rules};
2355     if (scalar(@$rules)) {
2356         $raw .= "[RULES]\n\n";
2357         $raw .= &$format_rules($rules, 1);
2358         $raw .= "\n";
2359     }
2360
2361     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2362 }
2363
2364 sub compile {
2365     my $vmdata = read_local_vm_config();
2366     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2367
2368     my $routing_table = read_proc_net_route();
2369
2370     my $cluster_conf = load_clusterfw_conf();
2371
2372     my $ipset_ruleset = {};
2373     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2374
2375     my $ruleset = {};
2376
2377     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2378     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2379
2380     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2381
2382     my $hostfw_conf = load_hostfw_conf();
2383     my $hostfw_options = $hostfw_conf->{options} || {};
2384
2385     generate_std_chains($ruleset, $hostfw_options);
2386
2387     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2388
2389     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2390
2391     # generate firewall rules for QEMU VMs
2392     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2393         my $conf = $vmdata->{qemu}->{$vmid};
2394         my $vmfw_conf = $vmfw_configs->{$vmid};
2395         next if !$vmfw_conf;
2396         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2397
2398         foreach my $netid (keys %$conf) {
2399             next if $netid !~ m/^net(\d+)$/;
2400             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2401             next if !$net;
2402             my $iface = "tap${vmid}i$1";
2403
2404             my $bridge = $net->{bridge};
2405             next if !$bridge; # fixme: ?
2406
2407             $bridge .= "v$net->{tag}" if $net->{tag};
2408
2409             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2410
2411             my $macaddr = $net->{macaddr};
2412             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2413                                          $vmfw_conf, $vmid, $bridge, 'IN');
2414             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2415                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2416         }
2417     }
2418
2419     # generate firewall rules for OpenVZ containers
2420     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2421         my $conf = $vmdata->{openvz}->{$vmid};
2422
2423         my $vmfw_conf = $vmfw_configs->{$vmid};
2424         next if !$vmfw_conf;
2425         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2426
2427         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2428             my $ip = $conf->{ip_address}->{value};
2429             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2430             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2431         }
2432
2433         if ($conf->{netif} && $conf->{netif}->{value}) {
2434             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2435             foreach my $netid (keys %$netif) {
2436                 my $d = $netif->{$netid};
2437                 my $bridge = $d->{bridge};
2438                 if (!$bridge) {
2439                     warn "no bridge device for CT $vmid iface '$netid'\n";
2440                     next; # fixme?
2441                 }
2442
2443                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2444
2445                 my $macaddr = $d->{mac};
2446                 my $iface = $d->{host_ifname};
2447                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2448                                              $vmfw_conf, $vmid, $bridge, 'IN');
2449                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2450                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2451             }
2452         }
2453     }
2454
2455     if($hostfw_options->{optimize}){
2456
2457         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2458         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2459         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2460     }
2461
2462     # fixme: what log level should we use here?
2463     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2464
2465     # fixme: should we really block inter-bridge traffic?
2466
2467     # always allow traffic from containers?
2468     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2469
2470     # disable interbridge routing
2471     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2472     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2473     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2474     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2475     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2476     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2477
2478     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2479 }
2480
2481 sub get_ruleset_status {
2482     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2483
2484     my $statushash = {};
2485
2486     foreach my $chain (sort keys %$ruleset) {
2487         my $sig = &$digest_fn($ruleset->{$chain});
2488
2489         $statushash->{$chain}->{sig} = $sig;
2490
2491         my $oldsig = $active_chains->{$chain};
2492         if (!defined($oldsig)) {
2493             $statushash->{$chain}->{action} = 'create';
2494         } else {
2495             if ($oldsig eq $sig) {
2496                 $statushash->{$chain}->{action} = 'exists';
2497             } else {
2498                 $statushash->{$chain}->{action} = 'update';
2499             }
2500         }
2501         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2502         foreach my $cmd (@{$ruleset->{$chain}}) {
2503             print "\t$cmd\n" if $verbose;
2504         }
2505     }
2506
2507     foreach my $chain (sort keys %$active_chains) {
2508         if (!defined($ruleset->{$chain})) {
2509             my $sig = $active_chains->{$chain};
2510             $statushash->{$chain}->{action} = 'delete';
2511             $statushash->{$chain}->{sig} = $sig;
2512             print "delete $chain ($sig)\n" if $verbose;
2513         }
2514     }
2515
2516     return $statushash;
2517 }
2518
2519 sub print_sig_rule {
2520     my ($chain, $sig) = @_;
2521
2522     # We just use this to store a SHA1 checksum used to detect changes
2523     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2524 }
2525
2526 sub get_ruleset_cmdlist {
2527     my ($ruleset, $verbose) = @_;
2528
2529     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2530
2531     my ($active_chains, $hooks) = iptables_get_chains();
2532     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2533
2534     # create missing chains first
2535     foreach my $chain (sort keys %$ruleset) {
2536         my $stat = $statushash->{$chain};
2537         die "internal error" if !$stat;
2538         next if $stat->{action} ne 'create';
2539
2540         $cmdlist .= ":$chain - [0:0]\n";
2541     }
2542
2543     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2544         if (!$hooks->{$h}) {
2545             $cmdlist .= "-A $h -j PVEFW-$h\n";
2546         }
2547     }
2548
2549     foreach my $chain (sort keys %$ruleset) {
2550         my $stat = $statushash->{$chain};
2551         die "internal error" if !$stat;
2552
2553         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2554             $cmdlist .= "-F $chain\n";
2555             foreach my $cmd (@{$ruleset->{$chain}}) {
2556                 $cmdlist .= "$cmd\n";
2557             }
2558             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2559         } elsif ($stat->{action} eq 'delete') {
2560             die "internal error"; # this should not happen
2561         } elsif ($stat->{action} eq 'exists') {
2562             # do nothing
2563         } else {
2564             die "internal error - unknown status '$stat->{action}'";
2565         }
2566     }
2567
2568     foreach my $chain (keys %$statushash) {
2569         next if $statushash->{$chain}->{action} ne 'delete';
2570         $cmdlist .= "-F $chain\n";
2571     }
2572     foreach my $chain (keys %$statushash) {
2573         next if $statushash->{$chain}->{action} ne 'delete';
2574         next if $chain eq 'PVEFW-INPUT';
2575         next if $chain eq 'PVEFW-OUTPUT';
2576         next if $chain eq 'PVEFW-FORWARD';
2577         $cmdlist .= "-X $chain\n";
2578     }
2579
2580     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2581
2582     $cmdlist .= "COMMIT\n";
2583
2584     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2585 }
2586
2587 sub get_ipset_cmdlist {
2588     my ($ruleset, $verbose) = @_;
2589
2590     my $cmdlist = "";
2591
2592     my $delete_cmdlist = "";
2593
2594     my $active_chains = ipset_get_chains();
2595     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2596
2597     foreach my $chain (sort keys %$ruleset) {
2598         my $stat = $statushash->{$chain};
2599         die "internal error" if !$stat;
2600
2601         if ($stat->{action} eq 'create') {
2602             foreach my $cmd (@{$ruleset->{$chain}}) {
2603                 $cmdlist .= "$cmd\n";
2604             }
2605         }
2606
2607         if ($stat->{action} eq 'update') {
2608             my $chain_swap = $chain."_swap";
2609
2610             foreach my $cmd (@{$ruleset->{$chain}}) {
2611                 $cmd =~ s/$chain/$chain_swap/;
2612                 $cmdlist .= "$cmd\n";
2613             }
2614             $cmdlist .= "swap $chain_swap $chain\n";
2615             $cmdlist .= "flush $chain_swap\n";
2616             $cmdlist .= "destroy $chain_swap\n";
2617         }
2618
2619     }
2620
2621     foreach my $chain (keys %$statushash) {
2622         next if $statushash->{$chain}->{action} ne 'delete';
2623
2624         $delete_cmdlist .= "flush $chain\n";
2625         $delete_cmdlist .= "destroy $chain\n";
2626     }
2627
2628     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2629
2630     return ($cmdlist, $delete_cmdlist, $changes);
2631 }
2632
2633 sub apply_ruleset {
2634     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2635
2636     enable_bridge_firewall();
2637
2638     update_nf_conntrack_max($hostfw_conf);
2639
2640     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2641         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2642
2643     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2644
2645     if ($verbose) {
2646         if ($ipset_changes) {
2647             print "ipset changes:\n";
2648             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2649             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2650         }
2651
2652         if ($changes) {
2653             print "iptables changes:\n";
2654             print $cmdlist;
2655         }
2656     }
2657
2658     ipset_restore_cmdlist($ipset_create_cmdlist);
2659
2660     iptables_restore_cmdlist($cmdlist);
2661
2662     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2663
2664     # test: re-read status and check if everything is up to date
2665     my $active_chains = iptables_get_chains();
2666     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2667
2668     my $errors;
2669     foreach my $chain (sort keys %$ruleset) {
2670         my $stat = $statushash->{$chain};
2671         if ($stat->{action} ne 'exists') {
2672             warn "unable to update chain '$chain'\n";
2673             $errors = 1;
2674         }
2675     }
2676
2677     die "unable to apply firewall changes\n" if $errors;
2678 }
2679
2680 sub update_nf_conntrack_max {
2681     my ($hostfw_conf) = @_;
2682
2683     my $max = 65536; # reasonable default
2684
2685     my $options = $hostfw_conf->{options} || {};
2686
2687     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2688         $max = $options->{nf_conntrack_max};
2689         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2690     }
2691
2692     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2693     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2694
2695     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2696
2697     if ($current != $max) {
2698         my $hashsize = int($max/4);
2699         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2700         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2701     }
2702 }
2703
2704 sub remove_pvefw_chains {
2705
2706     my ($chash, $hooks) = iptables_get_chains();
2707     my $cmdlist = "*filter\n";
2708
2709     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2710         if ($hooks->{$h}) {
2711             $cmdlist .= "-D $h -j PVEFW-$h\n";
2712         }
2713     }
2714
2715     foreach my $chain (keys %$chash) {
2716         $cmdlist .= "-F $chain\n";
2717     }
2718
2719     foreach my $chain (keys %$chash) {
2720         $cmdlist .= "-X $chain\n";
2721     }
2722     $cmdlist .= "COMMIT\n";
2723
2724     iptables_restore_cmdlist($cmdlist);
2725 }
2726
2727 sub update {
2728     my ($start, $verbose) = @_;
2729
2730     my $code = sub {
2731         my $status = read_pvefw_status();
2732
2733         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2734
2735         if ($start || $status eq 'active') {
2736
2737             save_pvefw_status('active') if ($status ne 'active');
2738
2739             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2740         } else {
2741             print "Firewall not active (status = $status)\n" if $verbose;
2742         }
2743     };
2744
2745     run_locked($code);
2746 }
2747
2748
2749 1;