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     my $icmp_port = 0;
 698
 699     foreach my $item (split(/,/, $str)) {
 700         $count++;
 701         if ($item =~ m/^(\d+):(\d+)$/) {
 702             my ($port1, $port2) = ($1, $2);
 703             die "invalid port '$port1'\n" if $port1 > 65535;
 704             die "invalid port '$port2'\n" if $port2 > 65535;
 705         } elsif ($item =~ m/^(\d+)$/) {
 706             my $port = $1;
 707             die "invalid port '$port'\n" if $port > 65535;
 708         } else {
 709             if ($icmp_type_names->{$item}) {
 710                 $icmp_port = 1;
 711             } else {
 712                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 713             }
 714         }
 715     }
 716
 717     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 718
 719     return $count;
 720 }
 721
 722 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 723 sub pve_fw_verify_port_spec {
 724    my ($portstr) = @_;
 725
 726    parse_port_name_number_or_range($portstr);
 727
 728    return $portstr;
 729 }
 730
 731 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 732 sub pve_fw_verify_v4addr_spec {
 733    my ($list) = @_;
 734
 735    parse_address_list($list);
 736
 737    return $list;
 738 }
 739
 740 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 741 sub pve_fw_verify_protocol_spec {
 742    my ($proto) = @_;
 743
 744    my $protocols = get_etc_protocols();
 745
 746    die "unknown protocol '$proto'\n" if $proto &&
 747        !(defined($protocols->{byname}->{$proto}) ||
 748          defined($protocols->{byid}->{$proto}));
 749
 750    return $proto;
 751 }
 752
 753
 754 # helper function for API
 755
 756 my $rule_properties = {
 757     pos => {
 758         description => "Update rule at position <pos>.",
 759         type => 'integer',
 760         minimum => 0,
 761         optional => 1,
 762     },
 763     digest => {
 764         type => 'string',
 765         optional => 1,
 766         maxLength => 27,
 767         minLength => 27,
 768     },
 769     type => {
 770         type => 'string',
 771         optional => 1,
 772         enum => ['in', 'out', 'group'],
 773     },
 774     action => {
 775         type => 'string',
 776         optional => 1,
 777         enum => ['ACCEPT', 'DROP', 'REJECT'],
 778     },
 779     macro => {
 780         type => 'string',
 781         optional => 1,
 782         maxLength => 128,
 783     },
 784     iface => get_standard_option('pve-iface', { optional => 1 }),
 785     source => {
 786         type => 'string', format => 'pve-fw-v4addr-spec',
 787         optional => 1,
 788     },
 789     dest => {
 790         type => 'string', format => 'pve-fw-v4addr-spec',
 791         optional => 1,
 792     },
 793     proto => {
 794         type => 'string', format => 'pve-fw-protocol-spec',
 795         optional => 1,
 796     },
 797     enable => {
 798         type => 'boolean',
 799         optional => 1,
 800     },
 801     sport => {
 802         type => 'string', format => 'pve-fw-port-spec',
 803         optional => 1,
 804     },
 805     dport => {
 806         type => 'string', format => 'pve-fw-port-spec',
 807         optional => 1,
 808     },
 809     comment => {
 810         type => 'string',
 811         optional => 1,
 812     },
 813 };
 814
 815 sub cleanup_fw_rule {
 816     my ($rule, $digest, $pos) = @_;
 817
 818     my $r = {};
 819
 820     foreach my $k (keys %$rule) {
 821         next if !$rule_properties->{$k};
 822         my $v = $rule->{$k};
 823         next if !defined($v);
 824         $r->{$k} = $v;
 825         $r->{digest} = $digest;
 826         $r->{pos} = $pos;
 827     }
 828
 829     return $r;
 830 }
 831
 832 sub add_rule_properties {
 833     my ($properties) = @_;
 834
 835     foreach my $k (keys %$rule_properties) {
 836         my $h = $rule_properties->{$k};
 837         # copy data, so that we can modify later without side effects
 838         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 839     }
 840
 841     return $properties;
 842 }
 843
 844 sub delete_rule_properties {
 845     my ($rule, $delete_str) = @_;
 846
 847     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 848         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 849             if !defined($rule_properties->{$opt});
 850         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 851             if $opt eq 'type' || $opt eq 'action';
 852         delete $rule->{$opt};
 853     }
 854
 855     return $rule;
 856 }
 857
 858 my $apply_macro = sub {
 859     my ($macro_name, $param, $verify) = @_;
 860
 861     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 862     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 863
 864     my $rules = [];
 865
 866     foreach my $templ (@$macro_rules) {
 867         my $rule = {};
 868         my $param_used = {};
 869         foreach my $k (keys %$templ) {
 870             my $v = $templ->{$k};
 871             if ($v eq 'PARAM') {
 872                 $v = $param->{$k};
 873                 $param_used->{$k} = 1;
 874             } elsif ($v eq 'DEST') {
 875                 $v = $param->{dest};
 876                 $param_used->{dest} = 1;
 877             } elsif ($v eq 'SOURCE') {
 878                 $v = $param->{source};
 879                 $param_used->{source} = 1;
 880             }
 881
 882             if (!defined($v)) {
 883                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 884                 raise_param_exc({ macro => $msg }) if $verify;
 885                 die "$msg\n";
 886             }
 887             $rule->{$k} = $v;
 888         }
 889         foreach my $k (keys %$param) {
 890             next if $k eq 'macro';
 891             next if !defined($param->{$k});
 892             next if $param_used->{$k};
 893             if (defined($rule->{$k})) {
 894                 if ($rule->{$k} ne $param->{$k}) {
 895                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 896                     raise_param_exc({ $k => $msg }) if $verify;
 897                     die "$msg\n";
 898                 }
 899             } else {
 900                 $rule->{$k} = $param->{$k};
 901             }
 902         }
 903         push @$rules, $rule;
 904     }
 905
 906     return $rules;
 907 };
 908
 909 sub verify_rule {
 910     my ($rule, $allow_groups) = @_;
 911
 912     my $type = $rule->{type};
 913
 914     raise_param_exc({ type => "missing property"}) if !$type;
 915     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 916
 917     if ($type eq  'in' || $type eq 'out') {
 918         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 919             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 920     } elsif ($type eq 'group') {
 921         raise_param_exc({ type => "security groups not allowed"})
 922             if !$allow_groups;
 923         raise_param_exc({ action => "invalid characters in security group name"})
 924             if $rule->{action} !~ m/^[A-Za-z0-9_\-]+$/;
 925     } else {
 926         raise_param_exc({ type => "unknown rule type '$type'"});
 927     }
 928
 929     # fixme: verify $rule->{iface}?
 930
 931     if ($rule->{macro}) {
 932         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 933         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 934         $rule->{macro} = $preferred_name;
 935     }
 936
 937     if ($rule->{dport}) {
 938         eval { parse_port_name_number_or_range($rule->{dport}); };
 939         raise_param_exc({ dport => $@ }) if $@;
 940     }
 941
 942     if ($rule->{sport}) {
 943         eval { parse_port_name_number_or_range($rule->{sport}); };
 944         raise_param_exc({ sport => $@ }) if $@;
 945     }
 946
 947     if ($rule->{source}) {
 948         eval { parse_address_list($rule->{source}); };
 949         raise_param_exc({ source => $@ }) if $@;
 950     }
 951
 952     if ($rule->{dest}) {
 953         eval { parse_address_list($rule->{dest}); };
 954         raise_param_exc({ dest => $@ }) if $@;
 955     }
 956
 957     if ($rule->{macro}) {
 958         &$apply_macro($rule->{macro}, $rule, 1);
 959     }
 960
 961     return $rule;
 962 }
 963
 964 sub copy_rule_data {
 965     my ($rule, $param) = @_;
 966
 967     foreach my $k (keys %$rule_properties) {
 968         if (defined(my $v = $param->{$k})) {
 969             if ($v eq '' || $v eq '-') {
 970                 delete $rule->{$k};
 971             } else {
 972                 $rule->{$k} = $v;
 973             }
 974         } else {
 975             delete $rule->{$k};
 976         }
 977     }
 978
 979     # verify rule now
 980
 981     return $rule;
 982 }
 983
 984 # core functions
 985 my $bridge_firewall_enabled = 0;
 986
 987 sub enable_bridge_firewall {
 988
 989     return if $bridge_firewall_enabled; # only once
 990
 991     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
 992     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
 993
 994     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
 995     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
 996
 997     $bridge_firewall_enabled = 1;
 998 }
 999
1000 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1001
1002 sub iptables_restore_cmdlist {
1003     my ($cmdlist) = @_;
1004
1005     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1006 }
1007
1008 sub ipset_restore_cmdlist {
1009     my ($cmdlist) = @_;
1010
1011     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1012 }
1013
1014 sub iptables_get_chains {
1015
1016     my $res = {};
1017
1018     # check what chains we want to track
1019     my $is_pvefw_chain = sub {
1020         my $name = shift;
1021
1022         return 1 if $name =~ m/^PVEFW-\S+$/;
1023
1024         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1025
1026         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1027
1028         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1029
1030         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1031         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1032
1033         return undef;
1034     };
1035
1036     my $table = '';
1037
1038     my $hooks = {};
1039
1040     my $parser = sub {
1041         my $line = shift;
1042
1043         return if $line =~ m/^#/;
1044         return if $line =~ m/^\s*$/;
1045
1046         if ($line =~ m/^\*(\S+)$/) {
1047             $table = $1;
1048             return;
1049         }
1050
1051         return if $table ne 'filter';
1052
1053         if ($line =~ m/^:(\S+)\s/) {
1054             my $chain = $1;
1055             return if !&$is_pvefw_chain($chain);
1056             $res->{$chain} = "unknown";
1057         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1058             my ($chain, $sig) = ($1, $2);
1059             return if !&$is_pvefw_chain($chain);
1060             $res->{$chain} = $sig;
1061         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1062             $hooks->{$1} = 1;
1063         } else {
1064             # simply ignore the rest
1065             return;
1066         }
1067     };
1068
1069     run_command("/sbin/iptables-save", outfunc => $parser);
1070
1071     return wantarray ? ($res, $hooks) : $res;
1072 }
1073
1074 sub iptables_chain_digest {
1075     my ($rules) = @_;
1076     my $digest = Digest::SHA->new('sha1');
1077     foreach my $rule (@$rules) { # order is important
1078         $digest->add($rule);
1079     }
1080     return $digest->b64digest;
1081 }
1082
1083 sub ipset_chain_digest {
1084     my ($rules) = @_;
1085
1086     my $digest = Digest::SHA->new('sha1');
1087     foreach my $rule (sort @$rules) { # note: sorted
1088         $digest->add($rule);
1089     }
1090     return $digest->b64digest;
1091 }
1092
1093 sub ipset_get_chains {
1094
1095     my $res = {};
1096     my $chains = {};
1097
1098     my $parser = sub {
1099         my $line = shift;
1100
1101         return if $line =~ m/^#/;
1102         return if $line =~ m/^\s*$/;
1103         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1104             my $chain = $1;
1105             $line =~ s/\s+$//; # delete trailing white space
1106             push @{$chains->{$chain}}, $line;
1107         } else {
1108             # simply ignore the rest
1109             return;
1110         }
1111     };
1112
1113     run_command("/usr/sbin/ipset save", outfunc => $parser);
1114
1115     # compute digest for each chain
1116     foreach my $chain (keys %$chains) {
1117         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1118     }
1119
1120     return $res;
1121 }
1122
1123 sub ruleset_generate_cmdstr {
1124     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1125
1126     return if defined($rule->{enable}) && !$rule->{enable};
1127
1128     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1129
1130     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1131     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1132
1133     my @cmd = ();
1134
1135     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1136     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1137
1138     my $source = $rule->{source};
1139     my $dest = $rule->{dest};
1140
1141     if ($source) {
1142         if ($source =~ m/^(\+)(\S+)$/) {
1143             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1144             push @cmd, "-m set --match-set PVEFW-$2 src";
1145
1146         } elsif ($source =~ m/\-/){
1147             push @cmd, "-m iprange --src-range $source";
1148
1149         } else {
1150             push @cmd, "-s $source";
1151         }
1152     }
1153
1154     if ($dest) {
1155         if ($dest =~ m/^(\+)(\S+)$/) {
1156             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1157             push @cmd, "-m set --match-set PVEFW-$2 dst";
1158
1159         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1160             push @cmd, "-m iprange --dst-range $dest";
1161
1162         } else {
1163             push @cmd, "-s $dest";
1164         }
1165     }
1166
1167     if ($rule->{proto}) {
1168         push @cmd, "-p $rule->{proto}";
1169
1170         my $multiport = 0;
1171         $multiport++ if $nbdport > 1;
1172         $multiport++ if $nbsport > 1;
1173
1174         push @cmd, "--match multiport" if $multiport;
1175
1176         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1177             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1178
1179         if ($rule->{dport}) {
1180             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1181                 # Note: we use dport to store --icmp-type
1182                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1183                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1184             } else {
1185                 if ($nbdport > 1) {
1186                     if ($multiport == 2) {
1187                         push @cmd,  "--ports $rule->{dport}";
1188                     } else {
1189                         push @cmd, "--dports $rule->{dport}";
1190                     }
1191                 } else {
1192                     push @cmd, "--dport $rule->{dport}";
1193                 }
1194             }
1195         }
1196
1197         if ($rule->{sport}) {
1198             if ($nbsport > 1) {
1199                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1200             } else {
1201                 push @cmd, "--sport $rule->{sport}";
1202             }
1203         }
1204     } elsif ($rule->{dport} || $rule->{sport}) {
1205         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1206         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1207     }
1208
1209     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1210
1211     if (my $action = $rule->{action}) {
1212         $action = $actions->{$action} if defined($actions->{$action});
1213         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1214         push @cmd, $goto ? "-g $action" : "-j $action";
1215     }
1216
1217     return scalar(@cmd) ? join(' ', @cmd) : undef;
1218 }
1219
1220 sub ruleset_generate_rule {
1221     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1222
1223     my $rules;
1224
1225     if ($rule->{macro}) {
1226         $rules = &$apply_macro($rule->{macro}, $rule);
1227     } else {
1228         $rules = [ $rule ];
1229     }
1230
1231     foreach my $tmp (@$rules) {
1232         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1233             ruleset_addrule($ruleset, $chain, $cmdstr);
1234         }
1235     }
1236 }
1237
1238 sub ruleset_generate_rule_insert {
1239     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1240
1241     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1242
1243     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1244         ruleset_insertrule($ruleset, $chain, $cmdstr);
1245     }
1246 }
1247
1248 sub ruleset_create_chain {
1249     my ($ruleset, $chain) = @_;
1250
1251     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1252     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1253
1254     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1255
1256     $ruleset->{$chain} = [];
1257 }
1258
1259 sub ruleset_chain_exist {
1260     my ($ruleset, $chain) = @_;
1261
1262     return $ruleset->{$chain} ? 1 : undef;
1263 }
1264
1265 sub ruleset_addrule {
1266    my ($ruleset, $chain, $rule) = @_;
1267
1268    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1269
1270    push @{$ruleset->{$chain}}, "-A $chain $rule";
1271 }
1272
1273 sub ruleset_insertrule {
1274    my ($ruleset, $chain, $rule) = @_;
1275
1276    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1277
1278    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1279 }
1280
1281 sub get_log_rule_base {
1282     my ($chain, $vmid, $msg, $loglevel) = @_;
1283
1284     die "internal error - no log level" if !defined($loglevel);
1285
1286     $vmid = 0 if !defined($vmid);
1287
1288     # Note: we use special format for prefix to pass further
1289     # info to log daemon (VMID, LOGVELEL and CHAIN)
1290
1291     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1292 }
1293
1294 sub ruleset_addlog {
1295     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1296
1297     return if !defined($loglevel);
1298
1299     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1300
1301     $logrule = "$rule $logrule" if defined($rule);
1302
1303     ruleset_addrule($ruleset, $chain, $logrule)
1304 }
1305
1306 sub generate_bridge_chains {
1307     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1308
1309     my $options = $hostfw_conf->{options} || {};
1310
1311     die "error: detected direct route to bridge '$bridge'\n"
1312         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1313
1314     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1315         ruleset_create_chain($ruleset, "$bridge-FW");
1316         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1317         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1318     }
1319
1320     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1321         ruleset_create_chain($ruleset, "$bridge-OUT");
1322         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1323         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1324     }
1325
1326     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1327         ruleset_create_chain($ruleset, "$bridge-IN");
1328         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1329         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1330         # accept traffic to unmanaged bridge ports
1331         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1332     }
1333 }
1334
1335 sub ruleset_add_chain_policy {
1336     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1337
1338     if ($policy eq 'ACCEPT') {
1339
1340         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1341                               { ACCEPT =>  $accept_action});
1342
1343     } elsif ($policy eq 'DROP') {
1344
1345         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1346
1347         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1348
1349         ruleset_addrule($ruleset, $chain, "-j DROP");
1350     } elsif ($policy eq 'REJECT') {
1351         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1352
1353         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1354
1355         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1356     } else {
1357         # should not happen
1358         die "internal error: unknown policy '$policy'";
1359     }
1360 }
1361
1362 sub ruleset_create_vm_chain {
1363     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1364
1365     ruleset_create_chain($ruleset, $chain);
1366     my $accept = generate_nfqueue($options);
1367
1368     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1369         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1370     }
1371
1372     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1373         if ($direction eq 'OUT') {
1374             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1375                                                       proto => 'udp', sport => 68, dport => 67 });
1376         } else {
1377             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1378                                                       proto => 'udp', sport => 67, dport => 68 });
1379         }
1380     }
1381
1382     if ($options->{tcpflags}) {
1383         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1384     }
1385
1386     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1387     if ($direction eq 'OUT') {
1388         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1389     } else {
1390         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1391     }
1392
1393     if ($direction eq 'OUT') {
1394         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1395             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1396         }
1397         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1398     }
1399 }
1400
1401 sub ruleset_generate_vm_rules {
1402     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1403
1404     my $lc_direction = lc($direction);
1405
1406     foreach my $rule (@$rules) {
1407         next if $rule->{iface} && $rule->{iface} ne $netid;
1408         next if !$rule->{enable};
1409         if ($rule->{type} eq 'group') {
1410             my $group_chain = "GROUP-$rule->{action}-$direction";
1411             if(!ruleset_chain_exist($ruleset, $group_chain)){
1412                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1413             }
1414             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1415             if ($direction eq 'OUT'){
1416                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1417             }else{
1418                 my $accept = generate_nfqueue($options);
1419                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1420             }
1421
1422         } else {
1423             next if $rule->{type} ne $lc_direction;
1424             if ($direction eq 'OUT') {
1425                 ruleset_generate_rule($ruleset, $chain, $rule,
1426                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1427             } else {
1428                 my $accept = generate_nfqueue($options);
1429                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1430             }
1431         }
1432     }
1433 }
1434
1435 sub generate_nfqueue {
1436     my ($options) = @_;
1437
1438     my $action = "";
1439     if($options->{ips}){
1440         $action = "NFQUEUE";
1441         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1442             if(defined($3) && defined($1)) {
1443                 $action .= " --queue-balance $1:$3";
1444             }elsif (defined($1)) {
1445                 $action .= " --queue-num $1";
1446             }
1447         }
1448         $action .= " --queue-bypass";
1449     }else{
1450         $action = "ACCEPT";
1451     }
1452
1453     return $action;
1454 }
1455
1456 sub ruleset_generate_vm_ipsrules {
1457     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1458
1459     if ($options->{ips} && $direction eq 'IN') {
1460         my $nfqueue = generate_nfqueue($options);
1461
1462         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1463             ruleset_create_chain($ruleset, "PVEFW-IPS");
1464         }
1465
1466         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1467             ruleset_create_chain($ruleset, "$bridge-IPS");
1468             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1469         }
1470
1471         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1472     }
1473 }
1474
1475 sub generate_venet_rules_direction {
1476     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1477
1478     parse_address_list($ip); # make sure we have a valid $ip list
1479
1480     my $lc_direction = lc($direction);
1481
1482     my $rules = $vmfw_conf->{rules};
1483
1484     my $options = $vmfw_conf->{options};
1485     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1486
1487     my $chain = "venet0-$vmid-$direction";
1488
1489     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1490
1491     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1492
1493     # implement policy
1494     my $policy;
1495
1496     if ($direction eq 'OUT') {
1497         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1498     } else {
1499         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1500     }
1501
1502     my $accept = generate_nfqueue($options);
1503     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1504     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1505
1506     # plug into FORWARD, INPUT and OUTPUT chain
1507     if ($direction eq 'OUT') {
1508         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1509             action => $chain,
1510             source => $ip,
1511             iface_in => 'venet0'});
1512
1513         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1514             action => $chain,
1515             source => $ip,
1516             iface_in => 'venet0'});
1517     } else {
1518         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1519             action => $chain,
1520             dest => $ip,
1521             iface_out => 'venet0'});
1522
1523         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1524             action => $chain,
1525             dest => $ip,
1526             iface_out => 'venet0'});
1527     }
1528 }
1529
1530 sub generate_tap_rules_direction {
1531     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1532
1533     my $lc_direction = lc($direction);
1534
1535     my $rules = $vmfw_conf->{rules};
1536
1537     my $options = $vmfw_conf->{options};
1538     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1539
1540     my $tapchain = "$iface-$direction";
1541
1542     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1543
1544     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1545
1546     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1547
1548     # implement policy
1549     my $policy;
1550
1551     if ($direction eq 'OUT') {
1552         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1553     } else {
1554         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1555     }
1556
1557     my $accept = generate_nfqueue($options);
1558     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1559     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1560
1561     # plug the tap chain to bridge chain
1562     if ($direction eq 'IN') {
1563         ruleset_insertrule($ruleset, "$bridge-IN",
1564                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1565     } else {
1566         ruleset_insertrule($ruleset, "$bridge-OUT",
1567                            "-m physdev --physdev-in $iface -j $tapchain");
1568     }
1569 }
1570
1571 sub enable_host_firewall {
1572     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1573
1574     # fixme: allow security groups
1575
1576     my $options = $hostfw_conf->{options};
1577     my $rules = $hostfw_conf->{rules};
1578
1579     # host inbound firewall
1580     my $chain = "PVEFW-HOST-IN";
1581     ruleset_create_chain($ruleset, $chain);
1582
1583     my $loglevel = get_option_log_level($options, "log_level_in");
1584
1585     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1586         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1587     }
1588
1589     if ($options->{tcpflags}) {
1590         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1591     }
1592
1593     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1594     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1595     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1596     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1597     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1598     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1599
1600     # we use RETURN because we need to check also tap rules
1601     my $accept_action = 'RETURN';
1602
1603     foreach my $rule (@$rules) {
1604         next if $rule->{type} ne 'in';
1605         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1606     }
1607
1608     # implement input policy
1609     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1610     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1611
1612     # host outbound firewall
1613     $chain = "PVEFW-HOST-OUT";
1614     ruleset_create_chain($ruleset, $chain);
1615
1616     $loglevel = get_option_log_level($options, "log_level_out");
1617
1618     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1619     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1620     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1621     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1622     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1623     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1624
1625     # we use RETURN because we may want to check other thigs later
1626     $accept_action = 'RETURN';
1627
1628     foreach my $rule (@$rules) {
1629         next if $rule->{type} ne 'out';
1630         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1631     }
1632
1633     # implement output policy
1634     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1635     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1636
1637     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1638     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1639 }
1640
1641 sub generate_group_rules {
1642     my ($ruleset, $cluster_conf, $group) = @_;
1643     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1644
1645     my $rules = $cluster_conf->{groups}->{$group};
1646
1647     my $chain = "GROUP-${group}-IN";
1648
1649     ruleset_create_chain($ruleset, $chain);
1650     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1651
1652     foreach my $rule (@$rules) {
1653         next if $rule->{type} ne 'in';
1654         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1655     }
1656
1657     $chain = "GROUP-${group}-OUT";
1658
1659     ruleset_create_chain($ruleset, $chain);
1660     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1661
1662     foreach my $rule (@$rules) {
1663         next if $rule->{type} ne 'out';
1664         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1665         # check also other tap rules later
1666         ruleset_generate_rule($ruleset, $chain, $rule,
1667                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1668     }
1669 }
1670
1671 my $MAX_NETS = 32;
1672 my $valid_netdev_names = {};
1673 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1674     $valid_netdev_names->{"net$i"} = 1;
1675 }
1676
1677 sub parse_fw_rule {
1678     my ($line, $need_iface, $allow_groups) = @_;
1679
1680     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1681
1682     # we can add single line comments to the end of the rule
1683     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1684
1685     # we can disable a rule when prefixed with '|'
1686     my $enable = 1;
1687
1688     $enable = 0 if $line =~ s/^\|//;
1689
1690     my @data = split(/\s+/, $line);
1691     my $expected_elements = $need_iface ? 8 : 7;
1692
1693     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1694
1695     if ($need_iface) {
1696         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1697     } else {
1698         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1699     }
1700
1701     die "incomplete rule\n" if ! ($type && $action);
1702
1703     my $macro;
1704
1705     $type = lc($type);
1706
1707     if ($type eq  'in' || $type eq 'out') {
1708         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1709             # OK
1710         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1711             $action = $2;
1712             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1713             die "unknown macro '$1'\n" if !$preferred_name;
1714             $macro = $preferred_name;
1715         } else {
1716             die "unknown action '$action'\n";
1717         }
1718     } elsif ($type eq 'group') {
1719         die "wrong number of rule elements\n" if scalar(@data) != 3;
1720         die "groups disabled\n" if !$allow_groups;
1721
1722         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1723     } else {
1724         die "unknown rule type '$type'\n";
1725     }
1726
1727     if ($need_iface) {
1728         $iface = undef if $iface && $iface eq '-';
1729     }
1730
1731     $proto = undef if $proto && $proto eq '-';
1732     pve_fw_verify_protocol_spec($proto) if $proto;
1733
1734     $source = undef if $source && $source eq '-';
1735     $dest = undef if $dest && $dest eq '-';
1736
1737     $dport = undef if $dport && $dport eq '-';
1738     $sport = undef if $sport && $sport eq '-';
1739
1740     parse_port_name_number_or_range($dport) if defined($dport);
1741     parse_port_name_number_or_range($sport) if defined($sport);
1742
1743     parse_address_list($source) if $source;
1744     parse_address_list($dest) if $dest;
1745
1746     return {
1747         type => $type,
1748         enable => $enable,
1749         comment => $comment,
1750         action => $action,
1751         macro => $macro,
1752         iface => $iface,
1753         source => $source,
1754         dest => $dest,
1755         proto => $proto,
1756         dport => $dport,
1757         sport => $sport,
1758     };
1759 }
1760
1761 sub parse_vmfw_option {
1762     my ($line) = @_;
1763
1764     my ($opt, $value);
1765
1766     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1767
1768     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1769         $opt = lc($1);
1770         $value = int($2);
1771     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1772         $opt = lc($1);
1773         $value = $2 ? lc($3) : '';
1774     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1775         $opt = lc($1);
1776         $value = uc($3);
1777     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1778         $opt = lc($1);
1779         $value = $2;
1780     } else {
1781         chomp $line;
1782         die "can't parse option '$line'\n"
1783     }
1784
1785     return ($opt, $value);
1786 }
1787
1788 sub parse_hostfw_option {
1789     my ($line) = @_;
1790
1791     my ($opt, $value);
1792
1793     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1794
1795     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1796         $opt = lc($1);
1797         $value = int($2);
1798     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1799         $opt = lc($1);
1800         $value = $2 ? lc($3) : '';
1801     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1802         $opt = lc($1);
1803         $value = uc($3);
1804     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1805         $opt = lc($1);
1806         $value = int($2);
1807     } else {
1808         chomp $line;
1809         die "can't parse option '$line'\n"
1810     }
1811
1812     return ($opt, $value);
1813 }
1814
1815 sub parse_clusterfw_option {
1816     my ($line) = @_;
1817
1818     my ($opt, $value);
1819
1820     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1821         $opt = lc($1);
1822         $value = int($2);
1823     } else {
1824         chomp $line;
1825         die "can't parse option '$line'\n"
1826     }
1827
1828     return ($opt, $value);
1829 }
1830
1831 sub parse_vm_fw_rules {
1832     my ($filename, $fh) = @_;
1833
1834     my $res = { rules => [], options => {}};
1835
1836     my $section;
1837
1838     my $digest = Digest::SHA->new('sha1');
1839
1840     while (defined(my $line = <$fh>)) {
1841         $digest->add($line);
1842
1843         next if $line =~ m/^#/;
1844         next if $line =~ m/^\s*$/;
1845
1846         my $linenr = $fh->input_line_number();
1847         my $prefix = "$filename (line $linenr)";
1848
1849         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1850             $section = lc($1);
1851             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1852             next;
1853         }
1854         if (!$section) {
1855             warn "$prefix: skip line - no section";
1856             next;
1857         }
1858
1859         next if !$res->{$section}; # skip undefined section
1860
1861         if ($section eq 'options') {
1862             eval {
1863                 my ($opt, $value) = parse_vmfw_option($line);
1864                 $res->{options}->{$opt} = $value;
1865             };
1866             warn "$prefix: $@" if $@;
1867             next;
1868         }
1869
1870         my $rule;
1871         eval { $rule = parse_fw_rule($line, 1, 1); };
1872         if (my $err = $@) {
1873             warn "$prefix: $err";
1874             next;
1875         }
1876
1877         push @{$res->{$section}}, $rule;
1878     }
1879
1880     $res->{digest} = $digest->b64digest;
1881
1882     return $res;
1883 }
1884
1885 sub parse_host_fw_rules {
1886     my ($filename, $fh) = @_;
1887
1888     my $res = { rules => [], options => {}};
1889
1890     my $section;
1891
1892     my $digest = Digest::SHA->new('sha1');
1893
1894     while (defined(my $line = <$fh>)) {
1895         $digest->add($line);
1896
1897         next if $line =~ m/^#/;
1898         next if $line =~ m/^\s*$/;
1899
1900         my $linenr = $fh->input_line_number();
1901         my $prefix = "$filename (line $linenr)";
1902
1903         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1904             $section = lc($1);
1905             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1906             next;
1907         }
1908         if (!$section) {
1909             warn "$prefix: skip line - no section";
1910             next;
1911         }
1912
1913         next if !$res->{$section}; # skip undefined section
1914
1915         if ($section eq 'options') {
1916             eval {
1917                 my ($opt, $value) = parse_hostfw_option($line);
1918                 $res->{options}->{$opt} = $value;
1919             };
1920             warn "$prefix: $@" if $@;
1921             next;
1922         }
1923
1924         my $rule;
1925         eval { $rule = parse_fw_rule($line, 1, 1); };
1926         if (my $err = $@) {
1927             warn "$prefix: $err";
1928             next;
1929         }
1930
1931         push @{$res->{$section}}, $rule;
1932     }
1933
1934 $res->{digest} = $digest->b64digest;
1935
1936     return $res;
1937 }
1938
1939 sub parse_cluster_fw_rules {
1940     my ($filename, $fh) = @_;
1941
1942     my $section;
1943     my $group;
1944
1945     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1946
1947     my $digest = Digest::SHA->new('sha1');
1948
1949     while (defined(my $line = <$fh>)) {
1950         $digest->add($line);
1951
1952         next if $line =~ m/^#/;
1953         next if $line =~ m/^\s*$/;
1954
1955         my $linenr = $fh->input_line_number();
1956         my $prefix = "$filename (line $linenr)";
1957
1958         if ($line =~ m/^\[options\]$/i) {
1959             $section = 'options';
1960             next;
1961         }
1962
1963         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1964             $section = 'groups';
1965             $group = lc($1);
1966             next;
1967         }
1968
1969         if ($line =~ m/^\[rules\]$/i) {
1970             $section = 'rules';
1971             next;
1972         }
1973
1974         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1975             $section = 'ipset';
1976             $group = lc($1);
1977             next;
1978         }
1979
1980         if (!$section) {
1981             warn "$prefix: skip line - no section\n";
1982             next;
1983         }
1984
1985         if ($section eq 'options') {
1986             eval {
1987                 my ($opt, $value) = parse_clusterfw_option($line);
1988                 $res->{options}->{$opt} = $value;
1989             };
1990             warn "$prefix: $@" if $@;
1991         } elsif ($section eq 'rules') {
1992             my $rule;
1993             eval { $rule = parse_fw_rule($line, 1, 1); };
1994             if (my $err = $@) {
1995                 warn "$prefix: $err";
1996                 next;
1997             }
1998             push @{$res->{$section}}, $rule;
1999         } elsif ($section eq 'groups') {
2000             my $rule;
2001             eval { $rule = parse_fw_rule($line, 0, 0); };
2002             if (my $err = $@) {
2003                 warn "$prefix: $err";
2004                 next;
2005             }
2006             push @{$res->{$section}->{$group}}, $rule;
2007         } elsif ($section eq 'ipset') {
2008             # we can add single line comments to the end of the rule
2009             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2010
2011             $line =~ m/^(\!)?\s*((?:\d+)\.(?:\d+)\.(?:\d+)\.(?:\d+))(?:\/(\d+))?\s*$/;
2012             my $nomatch = $1;
2013             my $cidr = $2;
2014
2015             $cidr .= "/$3" if defined($3) && $3 != 32;
2016
2017             if (!Net::IP->new($cidr)) {
2018                 my $err = Net::IP::Error();
2019                 warn "$prefix: $cidr - $err\n";
2020                 next;
2021             }
2022
2023             my $entry = { cidr => $cidr };
2024             $entry->{nomatch} = 1 if $nomatch;
2025             $entry->{comment} = $comment if $comment;
2026
2027             push @{$res->{$section}->{$group}}, $entry;
2028         }
2029     }
2030
2031     $res->{digest} = $digest->b64digest;
2032     return $res;
2033 }
2034
2035 sub run_locked {
2036     my ($code, @param) = @_;
2037
2038     my $timeout = 10;
2039
2040     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2041
2042     die $@ if $@;
2043
2044     return $res;
2045 }
2046
2047 sub read_local_vm_config {
2048
2049     my $openvz = {};
2050     my $qemu = {};
2051
2052     my $vmdata = { openvz => $openvz, qemu => $qemu };
2053
2054     my $vmlist = PVE::Cluster::get_vmlist();
2055     return $vmdata if !$vmlist || !$vmlist->{ids};
2056     my $ids = $vmlist->{ids};
2057
2058     foreach my $vmid (keys %$ids) {
2059         next if !$vmid; # skip VE0
2060         my $d = $ids->{$vmid};
2061         next if !$d->{node} || $d->{node} ne $nodename;
2062         next if !$d->{type};
2063         if ($d->{type} eq 'openvz') {
2064             if ($have_pve_manager) {
2065                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2066                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2067                     $openvz->{$vmid} = $conf;
2068                 }
2069             }
2070         } elsif ($d->{type} eq 'qemu') {
2071             if ($have_qemu_server) {
2072                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2073                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2074                     $qemu->{$vmid} = $conf;
2075                 }
2076             }
2077         }
2078     }
2079
2080     return $vmdata;
2081 };
2082
2083 sub load_vmfw_conf {
2084     my ($vmid) = @_;
2085
2086     my $vmfw_conf = {};
2087
2088     my $filename = "/etc/pve/firewall/$vmid.fw";
2089     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2090         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2091     }
2092
2093     return $vmfw_conf;
2094 }
2095
2096 my $format_rules = sub {
2097     my ($rules, $need_iface) = @_;
2098
2099     my $raw = '';
2100
2101     foreach my $rule (@$rules) {
2102         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2103             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2104             $raw .= uc($rule->{type});
2105             if ($rule->{macro}) {
2106                 $raw .= " $rule->{macro}($rule->{action})";
2107             } else {
2108                 $raw .= " " . $rule->{action};
2109             }
2110             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2111             $raw .= " " . ($rule->{source} || '-');
2112             $raw .= " " . ($rule->{dest} || '-');
2113             $raw .= " " . ($rule->{proto} || '-');
2114             $raw .= " " . ($rule->{dport} || '-');
2115             $raw .= " " . ($rule->{sport} || '-');
2116             $raw .= " # " . encode('utf8', $rule->{comment})
2117                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2118             $raw .= "\n";
2119         } else {
2120             die "implement me '$rule->{type}'";
2121         }
2122     }
2123
2124     return $raw;
2125 };
2126
2127 my $format_options = sub {
2128     my ($options) = @_;
2129
2130     my $raw = '';
2131
2132     $raw .= "[OPTIONS]\n\n";
2133     foreach my $opt (keys %$options) {
2134         $raw .= "$opt: $options->{$opt}\n";
2135     }
2136     $raw .= "\n";
2137
2138     return $raw;
2139 };
2140
2141 my $format_ipset = sub {
2142     my ($options) = @_;
2143
2144     my $raw = '';
2145
2146     my $nethash = {};
2147     foreach my $entry (@$options) {
2148         $nethash->{$entry->{cidr}} = $entry;
2149     }
2150
2151     foreach my $cidr (sort keys %$nethash) {
2152         my $entry = $nethash->{$cidr};
2153         my $line = $entry->{nomatch} ? '!' : '';
2154         $line .= $entry->{cidr};
2155         $line .= " # " . encode('utf8', $entry->{comment})
2156             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2157         $raw .= "$line\n";
2158     }
2159
2160     return $raw;
2161 };
2162
2163 sub save_vmfw_conf {
2164     my ($vmid, $vmfw_conf) = @_;
2165
2166     my $raw = '';
2167
2168     my $options = $vmfw_conf->{options};
2169     $raw .= &$format_options($options) if scalar(keys %$options);
2170
2171     my $rules = $vmfw_conf->{rules};
2172     if (scalar(@$rules)) {
2173         $raw .= "[RULES]\n\n";
2174         $raw .= &$format_rules($rules, 1);
2175         $raw .= "\n";
2176     }
2177
2178     my $filename = "/etc/pve/firewall/$vmid.fw";
2179     PVE::Tools::file_set_contents($filename, $raw);
2180 }
2181
2182 sub read_vm_firewall_configs {
2183     my ($vmdata) = @_;
2184     my $vmfw_configs = {};
2185
2186     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2187         my $vmfw_conf = load_vmfw_conf($vmid);
2188         next if !$vmfw_conf->{options}; # skip if file does not exists
2189         $vmfw_configs->{$vmid} = $vmfw_conf;
2190     }
2191
2192     return $vmfw_configs;
2193 }
2194
2195 sub get_option_log_level {
2196     my ($options, $k) = @_;
2197
2198     my $v = $options->{$k};
2199     $v = $default_log_level if !defined($v);
2200
2201     return undef if $v eq '' || $v eq 'nolog';
2202
2203     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2204
2205     return $v if ($v >= 0) && ($v <= 7);
2206
2207     warn "unknown log level ($k = '$v')\n";
2208
2209     return undef;
2210 }
2211
2212 sub generate_std_chains {
2213     my ($ruleset, $options) = @_;
2214
2215     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2216
2217     # same as shorewall smurflog.
2218     my $chain = 'PVEFW-smurflog';
2219
2220     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2221     push @{$pve_std_chains->{$chain}}, "-j DROP";
2222
2223     # same as shorewall logflags action.
2224     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2225     $chain = 'PVEFW-logflags';
2226     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2227     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2228     push @{$pve_std_chains->{$chain}}, "-j DROP";
2229
2230     foreach my $chain (keys %$pve_std_chains) {
2231         ruleset_create_chain($ruleset, $chain);
2232         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2233             if (ref($rule)) {
2234                 ruleset_generate_rule($ruleset, $chain, $rule);
2235             } else {
2236                 ruleset_addrule($ruleset, $chain, $rule);
2237             }
2238         }
2239     }
2240 }
2241
2242 sub generate_ipset_chains {
2243     my ($ipset_ruleset, $fw_conf) = @_;
2244
2245     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2246         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2247     }
2248 }
2249
2250 sub generate_ipset {
2251     my ($ipset_ruleset, $name, $options) = @_;
2252
2253     my $hashsize = scalar(@$options);
2254     if ($hashsize <= 64) {
2255         $hashsize = 64;
2256     } else {
2257         $hashsize = round_powerof2($hashsize);
2258     }
2259
2260     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2261
2262     foreach my $entry (@$options) {
2263         my $cidr = $entry->{cidr};
2264         my $cmd = "add $name $cidr";
2265         if ($entry->{nomatch}) {
2266             if ($feature_ipset_nomatch) {
2267                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2268             } else {
2269                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2270             }
2271         } else {
2272             push @{$ipset_ruleset->{$name}}, $cmd;
2273         }
2274     }
2275 }
2276
2277 sub round_powerof2 {
2278     my ($int) = @_;
2279
2280     $int--;
2281     $int |= $int >> $_ foreach (1,2,4,8,16);
2282     return ++$int;
2283 }
2284
2285 sub save_pvefw_status {
2286     my ($status) = @_;
2287
2288     die "unknown status '$status' - internal error"
2289         if $status !~ m/^(stopped|active)$/;
2290
2291     mkdir dirname($pve_fw_status_filename);
2292     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2293 }
2294
2295 sub read_pvefw_status {
2296
2297     my $status = 'unknown';
2298
2299     return 'stopped' if ! -f $pve_fw_status_filename;
2300
2301     eval {
2302         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2303     };
2304     warn $@ if $@;
2305
2306     return $status;
2307 }
2308
2309 # fixme: move to pve-common PVE::ProcFSTools
2310 sub read_proc_net_route {
2311     my $filename = "/proc/net/route";
2312
2313     my $res = {};
2314
2315     my $fh = IO::File->new ($filename, "r");
2316     return $res if !$fh;
2317
2318     my $int_to_quad = sub {
2319         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2320     };
2321
2322     while (defined(my $line = <$fh>)) {
2323         next if $line =~/^Iface\s+Destination/; # skip head
2324         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2325         push @{$res->{$iface}}, {
2326             dest => &$int_to_quad(hex($dest)),
2327             gateway => &$int_to_quad(hex($gateway)),
2328             mask => &$int_to_quad(hex($mask)),
2329             metric => $metric,
2330             mtu => $mtu,
2331         };
2332     }
2333
2334     return $res;
2335 }
2336
2337 sub load_clusterfw_conf {
2338
2339     my $cluster_conf = {};
2340      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2341         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2342     }
2343
2344     return $cluster_conf;
2345 }
2346
2347 sub save_clusterfw_conf {
2348     my ($cluster_conf) = @_;
2349
2350     my $raw = '';
2351
2352     my $options = $cluster_conf->{options};
2353     $raw .= &$format_options($options) if scalar(keys %$options);
2354
2355     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2356         $raw .= "[IPSET $ipset]\n\n";
2357         my $options = $cluster_conf->{ipset}->{$ipset};
2358         $raw .= &$format_ipset($options);
2359         $raw .= "\n";
2360     }
2361
2362     my $rules = $cluster_conf->{rules};
2363     if (scalar(@$rules)) {
2364         $raw .= "[RULES]\n\n";
2365         $raw .= &$format_rules($rules, 1);
2366         $raw .= "\n";
2367     }
2368
2369     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2370         my $rules = $cluster_conf->{groups}->{$group};
2371         $raw .= "[group $group]\n\n";
2372         $raw .= &$format_rules($rules, 0);
2373         $raw .= "\n";
2374     }
2375
2376     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2377 }
2378
2379 sub load_hostfw_conf {
2380
2381     my $hostfw_conf = {};
2382     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2383         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2384     }
2385     return $hostfw_conf;
2386 }
2387
2388 sub save_hostfw_conf {
2389     my ($hostfw_conf) = @_;
2390
2391     my $raw = '';
2392
2393     my $options = $hostfw_conf->{options};
2394     $raw .= &$format_options($options) if scalar(keys %$options);
2395
2396     my $rules = $hostfw_conf->{rules};
2397     if (scalar(@$rules)) {
2398         $raw .= "[RULES]\n\n";
2399         $raw .= &$format_rules($rules, 1);
2400         $raw .= "\n";
2401     }
2402
2403     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2404 }
2405
2406 sub compile {
2407     my $vmdata = read_local_vm_config();
2408     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2409
2410     my $routing_table = read_proc_net_route();
2411
2412     my $cluster_conf = load_clusterfw_conf();
2413
2414     my $ipset_ruleset = {};
2415     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2416
2417     my $ruleset = {};
2418
2419     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2420     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2421
2422     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2423
2424     my $hostfw_conf = load_hostfw_conf();
2425     my $hostfw_options = $hostfw_conf->{options} || {};
2426
2427     generate_std_chains($ruleset, $hostfw_options);
2428
2429     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2430
2431     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2432
2433     # generate firewall rules for QEMU VMs
2434     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2435         my $conf = $vmdata->{qemu}->{$vmid};
2436         my $vmfw_conf = $vmfw_configs->{$vmid};
2437         next if !$vmfw_conf;
2438         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2439
2440         foreach my $netid (keys %$conf) {
2441             next if $netid !~ m/^net(\d+)$/;
2442             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2443             next if !$net;
2444             my $iface = "tap${vmid}i$1";
2445
2446             my $bridge = $net->{bridge};
2447             next if !$bridge; # fixme: ?
2448
2449             $bridge .= "v$net->{tag}" if $net->{tag};
2450
2451             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2452
2453             my $macaddr = $net->{macaddr};
2454             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2455                                          $vmfw_conf, $vmid, $bridge, 'IN');
2456             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2457                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2458         }
2459     }
2460
2461     # generate firewall rules for OpenVZ containers
2462     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2463         my $conf = $vmdata->{openvz}->{$vmid};
2464
2465         my $vmfw_conf = $vmfw_configs->{$vmid};
2466         next if !$vmfw_conf;
2467         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2468
2469         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2470             my $ip = $conf->{ip_address}->{value};
2471             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2472             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2473         }
2474
2475         if ($conf->{netif} && $conf->{netif}->{value}) {
2476             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2477             foreach my $netid (keys %$netif) {
2478                 my $d = $netif->{$netid};
2479                 my $bridge = $d->{bridge};
2480                 if (!$bridge) {
2481                     warn "no bridge device for CT $vmid iface '$netid'\n";
2482                     next; # fixme?
2483                 }
2484
2485                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2486
2487                 my $macaddr = $d->{mac};
2488                 my $iface = $d->{host_ifname};
2489                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2490                                              $vmfw_conf, $vmid, $bridge, 'IN');
2491                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2492                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2493             }
2494         }
2495     }
2496
2497     if($hostfw_options->{optimize}){
2498
2499         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2500         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2501         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2502     }
2503
2504     # fixme: what log level should we use here?
2505     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2506
2507     # fixme: should we really block inter-bridge traffic?
2508
2509     # always allow traffic from containers?
2510     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2511
2512     # disable interbridge routing
2513     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2514     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2515     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2516     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2517     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2518     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2519
2520     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2521 }
2522
2523 sub get_ruleset_status {
2524     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2525
2526     my $statushash = {};
2527
2528     foreach my $chain (sort keys %$ruleset) {
2529         my $sig = &$digest_fn($ruleset->{$chain});
2530
2531         $statushash->{$chain}->{sig} = $sig;
2532
2533         my $oldsig = $active_chains->{$chain};
2534         if (!defined($oldsig)) {
2535             $statushash->{$chain}->{action} = 'create';
2536         } else {
2537             if ($oldsig eq $sig) {
2538                 $statushash->{$chain}->{action} = 'exists';
2539             } else {
2540                 $statushash->{$chain}->{action} = 'update';
2541             }
2542         }
2543         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2544         foreach my $cmd (@{$ruleset->{$chain}}) {
2545             print "\t$cmd\n" if $verbose;
2546         }
2547     }
2548
2549     foreach my $chain (sort keys %$active_chains) {
2550         if (!defined($ruleset->{$chain})) {
2551             my $sig = $active_chains->{$chain};
2552             $statushash->{$chain}->{action} = 'delete';
2553             $statushash->{$chain}->{sig} = $sig;
2554             print "delete $chain ($sig)\n" if $verbose;
2555         }
2556     }
2557
2558     return $statushash;
2559 }
2560
2561 sub print_sig_rule {
2562     my ($chain, $sig) = @_;
2563
2564     # We just use this to store a SHA1 checksum used to detect changes
2565     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2566 }
2567
2568 sub get_ruleset_cmdlist {
2569     my ($ruleset, $verbose) = @_;
2570
2571     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2572
2573     my ($active_chains, $hooks) = iptables_get_chains();
2574     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2575
2576     # create missing chains first
2577     foreach my $chain (sort keys %$ruleset) {
2578         my $stat = $statushash->{$chain};
2579         die "internal error" if !$stat;
2580         next if $stat->{action} ne 'create';
2581
2582         $cmdlist .= ":$chain - [0:0]\n";
2583     }
2584
2585     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2586         if (!$hooks->{$h}) {
2587             $cmdlist .= "-A $h -j PVEFW-$h\n";
2588         }
2589     }
2590
2591     foreach my $chain (sort keys %$ruleset) {
2592         my $stat = $statushash->{$chain};
2593         die "internal error" if !$stat;
2594
2595         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2596             $cmdlist .= "-F $chain\n";
2597             foreach my $cmd (@{$ruleset->{$chain}}) {
2598                 $cmdlist .= "$cmd\n";
2599             }
2600             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2601         } elsif ($stat->{action} eq 'delete') {
2602             die "internal error"; # this should not happen
2603         } elsif ($stat->{action} eq 'exists') {
2604             # do nothing
2605         } else {
2606             die "internal error - unknown status '$stat->{action}'";
2607         }
2608     }
2609
2610     foreach my $chain (keys %$statushash) {
2611         next if $statushash->{$chain}->{action} ne 'delete';
2612         $cmdlist .= "-F $chain\n";
2613     }
2614     foreach my $chain (keys %$statushash) {
2615         next if $statushash->{$chain}->{action} ne 'delete';
2616         next if $chain eq 'PVEFW-INPUT';
2617         next if $chain eq 'PVEFW-OUTPUT';
2618         next if $chain eq 'PVEFW-FORWARD';
2619         $cmdlist .= "-X $chain\n";
2620     }
2621
2622     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2623
2624     $cmdlist .= "COMMIT\n";
2625
2626     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2627 }
2628
2629 sub get_ipset_cmdlist {
2630     my ($ruleset, $verbose) = @_;
2631
2632     my $cmdlist = "";
2633
2634     my $delete_cmdlist = "";
2635
2636     my $active_chains = ipset_get_chains();
2637     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2638
2639     foreach my $chain (sort keys %$ruleset) {
2640         my $stat = $statushash->{$chain};
2641         die "internal error" if !$stat;
2642
2643         if ($stat->{action} eq 'create') {
2644             foreach my $cmd (@{$ruleset->{$chain}}) {
2645                 $cmdlist .= "$cmd\n";
2646             }
2647         }
2648
2649         if ($stat->{action} eq 'update') {
2650             my $chain_swap = $chain."_swap";
2651
2652             foreach my $cmd (@{$ruleset->{$chain}}) {
2653                 $cmd =~ s/$chain/$chain_swap/;
2654                 $cmdlist .= "$cmd\n";
2655             }
2656             $cmdlist .= "swap $chain_swap $chain\n";
2657             $cmdlist .= "flush $chain_swap\n";
2658             $cmdlist .= "destroy $chain_swap\n";
2659         }
2660
2661     }
2662
2663     foreach my $chain (keys %$statushash) {
2664         next if $statushash->{$chain}->{action} ne 'delete';
2665
2666         $delete_cmdlist .= "flush $chain\n";
2667         $delete_cmdlist .= "destroy $chain\n";
2668     }
2669
2670     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2671
2672     return ($cmdlist, $delete_cmdlist, $changes);
2673 }
2674
2675 sub apply_ruleset {
2676     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2677
2678     enable_bridge_firewall();
2679
2680     update_nf_conntrack_max($hostfw_conf);
2681
2682     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2683         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2684
2685     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2686
2687     if ($verbose) {
2688         if ($ipset_changes) {
2689             print "ipset changes:\n";
2690             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2691             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2692         }
2693
2694         if ($changes) {
2695             print "iptables changes:\n";
2696             print $cmdlist;
2697         }
2698     }
2699
2700     ipset_restore_cmdlist($ipset_create_cmdlist);
2701
2702     iptables_restore_cmdlist($cmdlist);
2703
2704     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2705
2706     # test: re-read status and check if everything is up to date
2707     my $active_chains = iptables_get_chains();
2708     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2709
2710     my $errors;
2711     foreach my $chain (sort keys %$ruleset) {
2712         my $stat = $statushash->{$chain};
2713         if ($stat->{action} ne 'exists') {
2714             warn "unable to update chain '$chain'\n";
2715             $errors = 1;
2716         }
2717     }
2718
2719     die "unable to apply firewall changes\n" if $errors;
2720 }
2721
2722 sub update_nf_conntrack_max {
2723     my ($hostfw_conf) = @_;
2724
2725     my $max = 65536; # reasonable default
2726
2727     my $options = $hostfw_conf->{options} || {};
2728
2729     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2730         $max = $options->{nf_conntrack_max};
2731         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2732     }
2733
2734     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2735     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2736
2737     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2738
2739     if ($current != $max) {
2740         my $hashsize = int($max/4);
2741         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2742         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2743     }
2744 }
2745
2746 sub remove_pvefw_chains {
2747
2748     my ($chash, $hooks) = iptables_get_chains();
2749     my $cmdlist = "*filter\n";
2750
2751     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2752         if ($hooks->{$h}) {
2753             $cmdlist .= "-D $h -j PVEFW-$h\n";
2754         }
2755     }
2756
2757     foreach my $chain (keys %$chash) {
2758         $cmdlist .= "-F $chain\n";
2759     }
2760
2761     foreach my $chain (keys %$chash) {
2762         $cmdlist .= "-X $chain\n";
2763     }
2764     $cmdlist .= "COMMIT\n";
2765
2766     iptables_restore_cmdlist($cmdlist);
2767 }
2768
2769 sub update {
2770     my ($start, $verbose) = @_;
2771
2772     my $code = sub {
2773         my $status = read_pvefw_status();
2774
2775         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2776
2777         if ($start || $status eq 'active') {
2778
2779             save_pvefw_status('active') if ($status ne 'active');
2780
2781             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2782         } else {
2783             print "Firewall not active (status = $status)\n" if $verbose;
2784         }
2785     };
2786
2787     run_locked($code);
2788 }
2789
2790
2791 1;