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 qw($IPV4RE);
  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     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$! && (!$1 || (($2 > 7) && ($2 <= 32)))) {
  43         return $cidr;
  44     }
  45     return undef if $noerr;
  46     die "value does not look like a valid IP address or CIDR network\n";
  47 }
  48
  49
  50 my $feature_ipset_nomatch = 0;
  51 eval  {
  52     my (undef, undef, $release) = POSIX::uname();
  53     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  54         my ($major, $minor) = ($1, $2);
  55         $feature_ipset_nomatch = 1 if ($major > 3) ||
  56             ($major == 3 && $minor >= 7);
  57     }
  58
  59 };
  60
  61 use Data::Dumper;
  62
  63 my $nodename = PVE::INotify::nodename();
  64
  65 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  66 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  67
  68 my $default_log_level = 'info';
  69
  70 my $log_level_hash = {
  71     debug => 7,
  72     info => 6,
  73     notice => 5,
  74     warning => 4,
  75     err => 3,
  76     crit => 2,
  77     alert => 1,
  78     emerg => 0,
  79 };
  80
  81 # imported/converted from: /usr/share/shorewall/macro.*
  82 my $pve_fw_macros = {
  83     'Amanda' => [
  84         "Amanda Backup",
  85         { action => 'PARAM', proto => 'udp', dport => '10080' },
  86         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  87     ],
  88     'Auth' => [
  89         "Auth (identd) traffic",
  90         { action => 'PARAM', proto => 'tcp', dport => '113' },
  91     ],
  92     'BGP' => [
  93         "Border Gateway Protocol traffic",
  94         { action => 'PARAM', proto => 'tcp', dport => '179' },
  95     ],
  96     'BitTorrent' => [
  97         "BitTorrent traffic for BitTorrent 3.1 and earlier",
  98         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
  99         { action => 'PARAM', proto => 'udp', dport => '6881' },
 100     ],
 101     'BitTorrent32' => [
 102         "BitTorrent traffic for BitTorrent 3.2 and later",
 103         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 104         { action => 'PARAM', proto => 'udp', dport => '6881' },
 105     ],
 106     'CVS' => [
 107         "Concurrent Versions System pserver traffic",
 108         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 109     ],
 110     'Citrix' => [
 111         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 112         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 113         { action => 'PARAM', proto => 'udp', dport => '1604' },
 114         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 115     ],
 116     'DAAP' => [
 117         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 118         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 119         { action => 'PARAM', proto => 'udp', dport => '3689' },
 120     ],
 121     'DCC' => [
 122         "Distributed Checksum Clearinghouse spam filtering mechanism",
 123         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 124     ],
 125     'DHCPfwd' => [
 126         "Forwarded DHCP traffic (bidirectional)",
 127         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 128         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 129     ],
 130     'DNS' => [
 131         "Domain Name System traffic (upd and tcp)",
 132         { action => 'PARAM', proto => 'udp', dport => '53' },
 133         { action => 'PARAM', proto => 'tcp', dport => '53' },
 134     ],
 135     'Distcc' => [
 136         "Distributed Compiler service",
 137         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 138     ],
 139     'FTP' => [
 140         "File Transfer Protocol",
 141         { action => 'PARAM', proto => 'tcp', dport => '21' },
 142     ],
 143     'Finger' => [
 144         "Finger protocol (RFC 742)",
 145         { action => 'PARAM', proto => 'tcp', dport => '79' },
 146     ],
 147     'GNUnet' => [
 148         "GNUnet secure peer-to-peer networking traffic",
 149         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 150         { action => 'PARAM', proto => 'udp', dport => '2086' },
 151         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 152         { action => 'PARAM', proto => 'udp', dport => '1080' },
 153     ],
 154     'GRE' => [
 155         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 156         { action => 'PARAM', proto => '47' },
 157         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 158     ],
 159     'Git' => [
 160         "Git distributed revision control traffic",
 161         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 162     ],
 163     'HKP' => [
 164         "OpenPGP HTTP keyserver protocol traffic",
 165         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 166     ],
 167     'HTTP' => [
 168         "Hypertext Transfer Protocol (WWW)",
 169         { action => 'PARAM', proto => 'tcp', dport => '80' },
 170     ],
 171     'HTTPS' => [
 172         "Hypertext Transfer Protocol (WWW) over SSL",
 173         { action => 'PARAM', proto => 'tcp', dport => '443' },
 174     ],
 175     'ICPV2' => [
 176         "Internet Cache Protocol V2 (Squid) traffic",
 177         { action => 'PARAM', proto => 'udp', dport => '3130' },
 178     ],
 179     'ICQ' => [
 180         "AOL Instant Messenger traffic",
 181         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 182     ],
 183     'IMAP' => [
 184         "Internet Message Access Protocol",
 185         { action => 'PARAM', proto => 'tcp', dport => '143' },
 186     ],
 187     'IMAPS' => [
 188         "Internet Message Access Protocol over SSL",
 189         { action => 'PARAM', proto => 'tcp', dport => '993' },
 190     ],
 191     'IPIP' => [
 192         "IPIP capsulation traffic (bidirectional)",
 193         { action => 'PARAM', proto => '94' },
 194         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 195     ],
 196     'IPsec' => [
 197         "IPsec traffic (bidirectional)",
 198         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 199         { action => 'PARAM', proto => '50' },
 200         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 201         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 202     ],
 203     'IPsecah' => [
 204         "IPsec authentication (AH) traffic (bidirectional)",
 205         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 206         { action => 'PARAM', proto => '51' },
 207         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 208         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 209     ],
 210     'IPsecnat' => [
 211         "IPsec traffic and Nat-Traversal (bidirectional)",
 212         { action => 'PARAM', proto => 'udp', dport => '500' },
 213         { action => 'PARAM', proto => 'udp', dport => '4500' },
 214         { action => 'PARAM', proto => '50' },
 215         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 216         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 217         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 218     ],
 219     'IRC' => [
 220         "Internet Relay Chat traffic",
 221         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 222     ],
 223     'Jetdirect' => [
 224         "HP Jetdirect printing",
 225         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 226     ],
 227     'L2TP' => [
 228         "Layer 2 Tunneling Protocol traffic",
 229         { action => 'PARAM', proto => 'udp', dport => '1701' },
 230         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 231     ],
 232     'LDAP' => [
 233         "Lightweight Directory Access Protocol traffic",
 234         { action => 'PARAM', proto => 'tcp', dport => '389' },
 235     ],
 236     'LDAPS' => [
 237         "Secure Lightweight Directory Access Protocol traffic",
 238         { action => 'PARAM', proto => 'tcp', dport => '636' },
 239     ],
 240     'MSNP' => [
 241         "Microsoft Notification Protocol",
 242         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 243     ],
 244     'MSSQL' => [
 245         "Microsoft SQL Server",
 246         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 247     ],
 248     'Mail' => [
 249         "Mail traffic (SMTP, SMTPS, Submission)",
 250         { action => 'PARAM', proto => 'tcp', dport => '25' },
 251         { action => 'PARAM', proto => 'tcp', dport => '465' },
 252         { action => 'PARAM', proto => 'tcp', dport => '587' },
 253     ],
 254     'Munin' => [
 255         "Munin networked resource monitoring traffic",
 256         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 257     ],
 258     'MySQL' => [
 259         "MySQL server",
 260         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 261     ],
 262     'NNTP' => [
 263         "NNTP traffic (Usenet).",
 264         { action => 'PARAM', proto => 'tcp', dport => '119' },
 265     ],
 266     'NNTPS' => [
 267         "Encrypted NNTP traffic (Usenet)",
 268         { action => 'PARAM', proto => 'tcp', dport => '563' },
 269     ],
 270     'NTP' => [
 271         "Network Time Protocol (ntpd)",
 272         { action => 'PARAM', proto => 'udp', dport => '123' },
 273     ],
 274     'NTPbi' => [
 275         "Bi-directional NTP (for NTP peers)",
 276         { action => 'PARAM', proto => 'udp', dport => '123' },
 277         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 278     ],
 279     'OSPF' => [
 280         "OSPF multicast traffic",
 281         { action => 'PARAM', proto => '89' },
 282     ],
 283     'OpenVPN' => [
 284         "OpenVPN traffic",
 285         { action => 'PARAM', proto => 'udp', dport => '1194' },
 286     ],
 287     'PCA' => [
 288         "Symantec PCAnywere (tm)",
 289         { action => 'PARAM', proto => 'udp', dport => '5632' },
 290         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 291     ],
 292     'POP3' => [
 293         "POP3 traffic",
 294         { action => 'PARAM', proto => 'tcp', dport => '110' },
 295     ],
 296     'POP3S' => [
 297         "Encrypted POP3 traffic",
 298         { action => 'PARAM', proto => 'tcp', dport => '995' },
 299     ],
 300     'PPtP' => [
 301         "Point-to-Point Tunneling Protocol",
 302         { action => 'PARAM', proto => '47' },
 303         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 304         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 305     ],
 306     'Ping' => [
 307         "ICMP echo request",
 308         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 309     ],
 310     'PostgreSQL' => [
 311         "PostgreSQL server",
 312         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 313     ],
 314     'Printer' => [
 315         "Line Printer protocol printing",
 316         { action => 'PARAM', proto => 'tcp', dport => '515' },
 317     ],
 318     'RDP' => [
 319         "Microsoft Remote Desktop Protocol traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 321     ],
 322     'RIPbi' => [
 323         "Routing Information Protocol (bidirectional)",
 324         { action => 'PARAM', proto => 'udp', dport => '520' },
 325         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 326     ],
 327     'RNDC' => [
 328         "BIND remote management protocol",
 329         { action => 'PARAM', proto => 'tcp', dport => '953' },
 330     ],
 331     'Razor' => [
 332         "Razor Antispam System",
 333         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 334     ],
 335     'Rdate' => [
 336         "Remote time retrieval (rdate)",
 337         { action => 'PARAM', proto => 'tcp', dport => '37' },
 338     ],
 339     'Rsync' => [
 340         "Rsync server",
 341         { action => 'PARAM', proto => 'tcp', dport => '873' },
 342     ],
 343     'SANE' => [
 344         "SANE network scanning",
 345         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 346     ],
 347     'SMB' => [
 348         "Microsoft SMB traffic",
 349         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 350         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 351         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 352         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 353     ],
 354     'SMBBI' => [
 355         "Microsoft SMB traffic (bidirectional)",
 356         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 357         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 358         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 359         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 360         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 361         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 362         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 363         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 364     ],
 365     'SMBswat' => [
 366         "Samba Web Administration Tool",
 367         { action => 'PARAM', proto => 'tcp', dport => '901' },
 368     ],
 369     'SMTP' => [
 370         "Simple Mail Transfer Protocol",
 371         { action => 'PARAM', proto => 'tcp', dport => '25' },
 372     ],
 373     'SMTPS' => [
 374         "Encrypted Simple Mail Transfer Protocol",
 375         { action => 'PARAM', proto => 'tcp', dport => '465' },
 376     ],
 377     'SNMP' => [
 378         "Simple Network Management Protocol",
 379         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 380         { action => 'PARAM', proto => 'tcp', dport => '161' },
 381     ],
 382     'SPAMD' => [
 383         "Spam Assassin SPAMD traffic",
 384         { action => 'PARAM', proto => 'tcp', dport => '783' },
 385     ],
 386     'SSH' => [
 387         "Secure shell traffic",
 388         { action => 'PARAM', proto => 'tcp', dport => '22' },
 389     ],
 390     'SVN' => [
 391         "Subversion server (svnserve)",
 392         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 393     ],
 394     'SixXS' => [
 395         "SixXS IPv6 Deployment and Tunnel Broker",
 396         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 397         { action => 'PARAM', proto => 'udp', dport => '3740' },
 398         { action => 'PARAM', proto => '41' },
 399         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 400     ],
 401     'Squid' => [
 402         "Squid web proxy traffic",
 403         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 404     ],
 405     'Submission' => [
 406         "Mail message submission traffic",
 407         { action => 'PARAM', proto => 'tcp', dport => '587' },
 408     ],
 409     'Syslog' => [
 410         "Syslog protocol (RFC 5424) traffic",
 411         { action => 'PARAM', proto => 'udp', dport => '514' },
 412         { action => 'PARAM', proto => 'tcp', dport => '514' },
 413     ],
 414     'TFTP' => [
 415         "Trivial File Transfer Protocol traffic",
 416         { action => 'PARAM', proto => 'udp', dport => '69' },
 417     ],
 418     'Telnet' => [
 419         "Telnet traffic",
 420         { action => 'PARAM', proto => 'tcp', dport => '23' },
 421     ],
 422     'Telnets' => [
 423         "Telnet over SSL",
 424         { action => 'PARAM', proto => 'tcp', dport => '992' },
 425     ],
 426     'Time' => [
 427         "RFC 868 Time protocol",
 428         { action => 'PARAM', proto => 'tcp', dport => '37' },
 429     ],
 430     'Trcrt' => [
 431         "Traceroute (for up to 30 hops) traffic",
 432         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 433         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 434     ],
 435     'VNC' => [
 436         "VNC traffic for VNC display's 0 - 9",
 437         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 438     ],
 439     'VNCL' => [
 440         "VNC traffic from Vncservers to Vncviewers in listen mode",
 441         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 442     ],
 443     'Web' => [
 444         "WWW traffic (HTTP and HTTPS)",
 445         { action => 'PARAM', proto => 'tcp', dport => '80' },
 446         { action => 'PARAM', proto => 'tcp', dport => '443' },
 447     ],
 448     'Webcache' => [
 449         "Web Cache/Proxy traffic (port 8080)",
 450         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 451     ],
 452     'Webmin' => [
 453         "Webmin traffic",
 454         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 455     ],
 456     'Whois' => [
 457         "Whois (nicname, RFC 3912) traffic",
 458         { action => 'PARAM', proto => 'tcp', dport => '43' },
 459     ],
 460 };
 461
 462 my $pve_fw_parsed_macros;
 463 my $pve_fw_macro_descr;
 464 my $pve_fw_preferred_macro_names = {};
 465
 466 my $pve_std_chains = {
 467     'PVEFW-SET-ACCEPT-MARK' => [
 468         "-j MARK --set-mark 1",
 469     ],
 470     'PVEFW-DropBroadcast' => [
 471         # same as shorewall 'Broadcast'
 472         # simply DROP BROADCAST/MULTICAST/ANYCAST
 473         # we can use this to reduce logging
 474         { action => 'DROP', dsttype => 'BROADCAST' },
 475         { action => 'DROP', dsttype => 'MULTICAST' },
 476         { action => 'DROP', dsttype => 'ANYCAST' },
 477         { action => 'DROP', dest => '224.0.0.0/4' },
 478     ],
 479     'PVEFW-reject' => [
 480         # same as shorewall 'reject'
 481         { action => 'DROP', dsttype => 'BROADCAST' },
 482         { action => 'DROP', source => '224.0.0.0/4' },
 483         { action => 'DROP', proto => 'icmp' },
 484         "-p tcp -j REJECT --reject-with tcp-reset",
 485         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 486         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 487         "-j REJECT --reject-with icmp-host-prohibited",
 488     ],
 489     'PVEFW-Drop' => [
 490         # same as shorewall 'Drop', which is equal to DROP,
 491         # but REJECT/DROP some packages to reduce logging,
 492         # and ACCEPT critical ICMP types
 493         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 494         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 495         { action => 'PVEFW-DropBroadcast' },
 496         # ACCEPT critical ICMP types
 497         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 498         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 499         # Drop packets with INVALID state
 500         "-m conntrack --ctstate INVALID -j DROP",
 501         # Drop Microsoft SMB noise
 502         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 503         { action => 'DROP', proto => 'udp', dport => '137:139'},
 504         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 505         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 506         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 507         # Drop new/NotSyn traffic so that it doesn't get logged
 508         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 509         # Drop DNS replies
 510         { action => 'DROP', proto => 'udp', sport => 53 },
 511     ],
 512     'PVEFW-Reject' => [
 513         # same as shorewall 'Reject', which is equal to Reject,
 514         # but REJECT/DROP some packages to reduce logging,
 515         # and ACCEPT critical ICMP types
 516         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 517         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 518         { action => 'PVEFW-DropBroadcast' },
 519         # ACCEPT critical ICMP types
 520         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 521         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 522         # Drop packets with INVALID state
 523         "-m conntrack --ctstate INVALID -j DROP",
 524         # Drop Microsoft SMB noise
 525         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 526         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 527         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 528         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 529         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 530         # Drop new/NotSyn traffic so that it doesn't get logged
 531         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 532         # Drop DNS replies
 533         { action => 'DROP', proto => 'udp', sport => 53 },
 534     ],
 535     'PVEFW-tcpflags' => [
 536         # same as shorewall tcpflags action.
 537         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 538         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 539         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 540         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 541         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 542         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 543     ],
 544     'PVEFW-smurfs' => [
 545         # same as shorewall smurfs action
 546         # Filter packets for smurfs (packets with a broadcast address as the source).
 547         "-s 0.0.0.0/32 -j RETURN",
 548         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 549         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 550     ],
 551 };
 552
 553 # iptables -p icmp -h
 554 my $icmp_type_names = {
 555     any => 1,
 556     'echo-reply' => 1,
 557     'destination-unreachable' => 1,
 558     'network-unreachable' => 1,
 559     'host-unreachable' => 1,
 560     'protocol-unreachable' => 1,
 561     'port-unreachable' => 1,
 562     'fragmentation-needed' => 1,
 563     'source-route-failed' => 1,
 564     'network-unknown' => 1,
 565     'host-unknown' => 1,
 566     'network-prohibited' => 1,
 567     'host-prohibited' => 1,
 568     'TOS-network-unreachable' => 1,
 569     'TOS-host-unreachable' => 1,
 570     'communication-prohibited' => 1,
 571     'host-precedence-violation' => 1,
 572     'precedence-cutoff' => 1,
 573     'source-quench' => 1,
 574     'redirect' => 1,
 575     'network-redirect' => 1,
 576     'host-redirect' => 1,
 577     'TOS-network-redirect' => 1,
 578     'TOS-host-redirect' => 1,
 579     'echo-request' => 1,
 580     'router-advertisement' => 1,
 581     'router-solicitation' => 1,
 582     'time-exceeded' => 1,
 583     'ttl-zero-during-transit' => 1,
 584     'ttl-zero-during-reassembly' => 1,
 585     'parameter-problem' => 1,
 586     'ip-header-bad' => 1,
 587     'required-option-missing' => 1,
 588     'timestamp-request' => 1,
 589     'timestamp-reply' => 1,
 590     'address-mask-request' => 1,
 591     'address-mask-reply' => 1,
 592 };
 593
 594 sub init_firewall_macros {
 595
 596     $pve_fw_parsed_macros = {};
 597
 598     foreach my $k (keys %$pve_fw_macros) {
 599         my $lc_name = lc($k);
 600         my $macro = $pve_fw_macros->{$k};
 601         if (!ref($macro->[0])) {
 602             $pve_fw_macro_descr->{$k} = shift @$macro;
 603         }
 604         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 605         $pve_fw_parsed_macros->{$k} = $macro;
 606     }
 607 }
 608
 609 init_firewall_macros();
 610
 611 sub get_macros {
 612     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 613 }
 614
 615 my $etc_services;
 616
 617 sub get_etc_services {
 618
 619     return $etc_services if $etc_services;
 620
 621     my $filename = "/etc/services";
 622
 623     my $fh = IO::File->new($filename, O_RDONLY);
 624     if (!$fh) {
 625         warn "unable to read '$filename' - $!\n";
 626         return {};
 627     }
 628
 629     my $services = {};
 630
 631     while (my $line = <$fh>) {
 632         chomp ($line);
 633         next if $line =~m/^#/;
 634         next if ($line =~m/^\s*$/);
 635
 636         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 637             $services->{byid}->{$2}->{name} = $1;
 638             $services->{byid}->{$2}->{port} = $2;
 639             $services->{byid}->{$2}->{$3} = 1;
 640             $services->{byname}->{$1} = $services->{byid}->{$2};
 641         }
 642     }
 643
 644     close($fh);
 645
 646     $etc_services = $services;
 647
 648
 649     return $etc_services;
 650 }
 651
 652 my $etc_protocols;
 653
 654 sub get_etc_protocols {
 655     return $etc_protocols if $etc_protocols;
 656
 657     my $filename = "/etc/protocols";
 658
 659     my $fh = IO::File->new($filename, O_RDONLY);
 660     if (!$fh) {
 661         warn "unable to read '$filename' - $!\n";
 662         return {};
 663     }
 664
 665     my $protocols = {};
 666
 667     while (my $line = <$fh>) {
 668         chomp ($line);
 669         next if $line =~m/^#/;
 670         next if ($line =~m/^\s*$/);
 671
 672         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 673             $protocols->{byid}->{$2}->{name} = $1;
 674             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 675         }
 676     }
 677
 678     close($fh);
 679
 680     $etc_protocols = $protocols;
 681
 682     return $etc_protocols;
 683 }
 684
 685 sub parse_address_list {
 686     my ($str) = @_;
 687
 688     return if $str !~ m/^(\+)(\S+)$/; # ipset ref
 689
 690     my $count = 0;
 691     my $iprange = 0;
 692     foreach my $elem (split(/,/, $str)) {
 693         $count++;
 694         if (!Net::IP->new($elem)) {
 695             my $err = Net::IP::Error();
 696             die "invalid IP address: $err\n";
 697         }
 698         $iprange = 1 if $elem =~ m/-/;
 699     }
 700
 701     die "you can use a range in a list\n" if $iprange && $count > 1;
 702 }
 703
 704 sub parse_port_name_number_or_range {
 705     my ($str) = @_;
 706
 707     my $services = PVE::Firewall::get_etc_services();
 708     my $count = 0;
 709     my $icmp_port = 0;
 710
 711     foreach my $item (split(/,/, $str)) {
 712         $count++;
 713         if ($item =~ m/^(\d+):(\d+)$/) {
 714             my ($port1, $port2) = ($1, $2);
 715             die "invalid port '$port1'\n" if $port1 > 65535;
 716             die "invalid port '$port2'\n" if $port2 > 65535;
 717         } elsif ($item =~ m/^(\d+)$/) {
 718             my $port = $1;
 719             die "invalid port '$port'\n" if $port > 65535;
 720         } else {
 721             if ($icmp_type_names->{$item}) {
 722                 $icmp_port = 1;
 723             } else {
 724                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 725             }
 726         }
 727     }
 728
 729     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 730
 731     return $count;
 732 }
 733
 734 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 735 sub pve_fw_verify_port_spec {
 736    my ($portstr) = @_;
 737
 738    parse_port_name_number_or_range($portstr);
 739
 740    return $portstr;
 741 }
 742
 743 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 744 sub pve_fw_verify_v4addr_spec {
 745    my ($list) = @_;
 746
 747    parse_address_list($list);
 748
 749    return $list;
 750 }
 751
 752 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 753 sub pve_fw_verify_protocol_spec {
 754    my ($proto) = @_;
 755
 756    my $protocols = get_etc_protocols();
 757
 758    die "unknown protocol '$proto'\n" if $proto &&
 759        !(defined($protocols->{byname}->{$proto}) ||
 760          defined($protocols->{byid}->{$proto}));
 761
 762    return $proto;
 763 }
 764
 765
 766 # helper function for API
 767
 768 my $rule_properties = {
 769     pos => {
 770         description => "Update rule at position <pos>.",
 771         type => 'integer',
 772         minimum => 0,
 773         optional => 1,
 774     },
 775     digest => {
 776         type => 'string',
 777         optional => 1,
 778         maxLength => 27,
 779         minLength => 27,
 780     },
 781     type => {
 782         type => 'string',
 783         optional => 1,
 784         enum => ['in', 'out', 'group'],
 785     },
 786     action => {
 787         type => 'string',
 788         optional => 1,
 789         enum => ['ACCEPT', 'DROP', 'REJECT'],
 790     },
 791     macro => {
 792         type => 'string',
 793         optional => 1,
 794         maxLength => 128,
 795     },
 796     iface => get_standard_option('pve-iface', { optional => 1 }),
 797     source => {
 798         type => 'string', format => 'pve-fw-v4addr-spec',
 799         optional => 1,
 800     },
 801     dest => {
 802         type => 'string', format => 'pve-fw-v4addr-spec',
 803         optional => 1,
 804     },
 805     proto => {
 806         type => 'string', format => 'pve-fw-protocol-spec',
 807         optional => 1,
 808     },
 809     enable => {
 810         type => 'boolean',
 811         optional => 1,
 812     },
 813     sport => {
 814         type => 'string', format => 'pve-fw-port-spec',
 815         optional => 1,
 816     },
 817     dport => {
 818         type => 'string', format => 'pve-fw-port-spec',
 819         optional => 1,
 820     },
 821     comment => {
 822         type => 'string',
 823         optional => 1,
 824     },
 825 };
 826
 827 sub cleanup_fw_rule {
 828     my ($rule, $digest, $pos) = @_;
 829
 830     my $r = {};
 831
 832     foreach my $k (keys %$rule) {
 833         next if !$rule_properties->{$k};
 834         my $v = $rule->{$k};
 835         next if !defined($v);
 836         $r->{$k} = $v;
 837         $r->{digest} = $digest;
 838         $r->{pos} = $pos;
 839     }
 840
 841     return $r;
 842 }
 843
 844 sub add_rule_properties {
 845     my ($properties) = @_;
 846
 847     foreach my $k (keys %$rule_properties) {
 848         my $h = $rule_properties->{$k};
 849         # copy data, so that we can modify later without side effects
 850         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 851     }
 852
 853     return $properties;
 854 }
 855
 856 sub delete_rule_properties {
 857     my ($rule, $delete_str) = @_;
 858
 859     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 860         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 861             if !defined($rule_properties->{$opt});
 862         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 863             if $opt eq 'type' || $opt eq 'action';
 864         delete $rule->{$opt};
 865     }
 866
 867     return $rule;
 868 }
 869
 870 my $apply_macro = sub {
 871     my ($macro_name, $param, $verify) = @_;
 872
 873     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 874     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 875
 876     my $rules = [];
 877
 878     foreach my $templ (@$macro_rules) {
 879         my $rule = {};
 880         my $param_used = {};
 881         foreach my $k (keys %$templ) {
 882             my $v = $templ->{$k};
 883             if ($v eq 'PARAM') {
 884                 $v = $param->{$k};
 885                 $param_used->{$k} = 1;
 886             } elsif ($v eq 'DEST') {
 887                 $v = $param->{dest};
 888                 $param_used->{dest} = 1;
 889             } elsif ($v eq 'SOURCE') {
 890                 $v = $param->{source};
 891                 $param_used->{source} = 1;
 892             }
 893
 894             if (!defined($v)) {
 895                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 896                 raise_param_exc({ macro => $msg }) if $verify;
 897                 die "$msg\n";
 898             }
 899             $rule->{$k} = $v;
 900         }
 901         foreach my $k (keys %$param) {
 902             next if $k eq 'macro';
 903             next if !defined($param->{$k});
 904             next if $param_used->{$k};
 905             if (defined($rule->{$k})) {
 906                 if ($rule->{$k} ne $param->{$k}) {
 907                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 908                     raise_param_exc({ $k => $msg }) if $verify;
 909                     die "$msg\n";
 910                 }
 911             } else {
 912                 $rule->{$k} = $param->{$k};
 913             }
 914         }
 915         push @$rules, $rule;
 916     }
 917
 918     return $rules;
 919 };
 920
 921 sub verify_rule {
 922     my ($rule, $allow_groups) = @_;
 923
 924     my $type = $rule->{type};
 925
 926     raise_param_exc({ type => "missing property"}) if !$type;
 927     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 928
 929     if ($type eq  'in' || $type eq 'out') {
 930         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 931             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 932     } elsif ($type eq 'group') {
 933         raise_param_exc({ type => "security groups not allowed"})
 934             if !$allow_groups;
 935         raise_param_exc({ action => "invalid characters in security group name"})
 936             if $rule->{action} !~ m/^[A-Za-z0-9_\-]+$/;
 937     } else {
 938         raise_param_exc({ type => "unknown rule type '$type'"});
 939     }
 940
 941     # fixme: verify $rule->{iface}?
 942
 943     if ($rule->{macro}) {
 944         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 945         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 946         $rule->{macro} = $preferred_name;
 947     }
 948
 949     if ($rule->{dport}) {
 950         eval { parse_port_name_number_or_range($rule->{dport}); };
 951         raise_param_exc({ dport => $@ }) if $@;
 952     }
 953
 954     if ($rule->{sport}) {
 955         eval { parse_port_name_number_or_range($rule->{sport}); };
 956         raise_param_exc({ sport => $@ }) if $@;
 957     }
 958
 959     if ($rule->{source}) {
 960         eval { parse_address_list($rule->{source}); };
 961         raise_param_exc({ source => $@ }) if $@;
 962     }
 963
 964     if ($rule->{dest}) {
 965         eval { parse_address_list($rule->{dest}); };
 966         raise_param_exc({ dest => $@ }) if $@;
 967     }
 968
 969     if ($rule->{macro}) {
 970         &$apply_macro($rule->{macro}, $rule, 1);
 971     }
 972
 973     return $rule;
 974 }
 975
 976 sub copy_rule_data {
 977     my ($rule, $param) = @_;
 978
 979     foreach my $k (keys %$rule_properties) {
 980         if (defined(my $v = $param->{$k})) {
 981             if ($v eq '' || $v eq '-') {
 982                 delete $rule->{$k};
 983             } else {
 984                 $rule->{$k} = $v;
 985             }
 986         } else {
 987             delete $rule->{$k};
 988         }
 989     }
 990
 991     # verify rule now
 992
 993     return $rule;
 994 }
 995
 996 # core functions
 997 my $bridge_firewall_enabled = 0;
 998
 999 sub enable_bridge_firewall {
1000
1001     return if $bridge_firewall_enabled; # only once
1002
1003     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1004     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1005
1006     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1007     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1008
1009     $bridge_firewall_enabled = 1;
1010 }
1011
1012 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1013
1014 sub iptables_restore_cmdlist {
1015     my ($cmdlist) = @_;
1016
1017     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1018 }
1019
1020 sub ipset_restore_cmdlist {
1021     my ($cmdlist) = @_;
1022
1023     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1024 }
1025
1026 sub iptables_get_chains {
1027
1028     my $res = {};
1029
1030     # check what chains we want to track
1031     my $is_pvefw_chain = sub {
1032         my $name = shift;
1033
1034         return 1 if $name =~ m/^PVEFW-\S+$/;
1035
1036         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1037
1038         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1039
1040         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1041
1042         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1043         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1044
1045         return undef;
1046     };
1047
1048     my $table = '';
1049
1050     my $hooks = {};
1051
1052     my $parser = sub {
1053         my $line = shift;
1054
1055         return if $line =~ m/^#/;
1056         return if $line =~ m/^\s*$/;
1057
1058         if ($line =~ m/^\*(\S+)$/) {
1059             $table = $1;
1060             return;
1061         }
1062
1063         return if $table ne 'filter';
1064
1065         if ($line =~ m/^:(\S+)\s/) {
1066             my $chain = $1;
1067             return if !&$is_pvefw_chain($chain);
1068             $res->{$chain} = "unknown";
1069         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1070             my ($chain, $sig) = ($1, $2);
1071             return if !&$is_pvefw_chain($chain);
1072             $res->{$chain} = $sig;
1073         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1074             $hooks->{$1} = 1;
1075         } else {
1076             # simply ignore the rest
1077             return;
1078         }
1079     };
1080
1081     run_command("/sbin/iptables-save", outfunc => $parser);
1082
1083     return wantarray ? ($res, $hooks) : $res;
1084 }
1085
1086 sub iptables_chain_digest {
1087     my ($rules) = @_;
1088     my $digest = Digest::SHA->new('sha1');
1089     foreach my $rule (@$rules) { # order is important
1090         $digest->add($rule);
1091     }
1092     return $digest->b64digest;
1093 }
1094
1095 sub ipset_chain_digest {
1096     my ($rules) = @_;
1097
1098     my $digest = Digest::SHA->new('sha1');
1099     foreach my $rule (sort @$rules) { # note: sorted
1100         $digest->add($rule);
1101     }
1102     return $digest->b64digest;
1103 }
1104
1105 sub ipset_get_chains {
1106
1107     my $res = {};
1108     my $chains = {};
1109
1110     my $parser = sub {
1111         my $line = shift;
1112
1113         return if $line =~ m/^#/;
1114         return if $line =~ m/^\s*$/;
1115         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1116             my $chain = $1;
1117             $line =~ s/\s+$//; # delete trailing white space
1118             push @{$chains->{$chain}}, $line;
1119         } else {
1120             # simply ignore the rest
1121             return;
1122         }
1123     };
1124
1125     run_command("/usr/sbin/ipset save", outfunc => $parser);
1126
1127     # compute digest for each chain
1128     foreach my $chain (keys %$chains) {
1129         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1130     }
1131
1132     return $res;
1133 }
1134
1135 sub ruleset_generate_cmdstr {
1136     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1137
1138     return if defined($rule->{enable}) && !$rule->{enable};
1139
1140     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1141
1142     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1143     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1144
1145     my @cmd = ();
1146
1147     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1148     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1149
1150     my $source = $rule->{source};
1151     my $dest = $rule->{dest};
1152
1153     if ($source) {
1154         if ($source =~ m/^(\+)(\S+)$/) {
1155             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1156             push @cmd, "-m set --match-set PVEFW-$2 src";
1157
1158         } elsif ($source =~ m/\-/){
1159             push @cmd, "-m iprange --src-range $source";
1160
1161         } else {
1162             push @cmd, "-s $source";
1163         }
1164     }
1165
1166     if ($dest) {
1167         if ($dest =~ m/^(\+)(\S+)$/) {
1168             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1169             push @cmd, "-m set --match-set PVEFW-$2 dst";
1170
1171         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1172             push @cmd, "-m iprange --dst-range $dest";
1173
1174         } else {
1175             push @cmd, "-s $dest";
1176         }
1177     }
1178
1179     if ($rule->{proto}) {
1180         push @cmd, "-p $rule->{proto}";
1181
1182         my $multiport = 0;
1183         $multiport++ if $nbdport > 1;
1184         $multiport++ if $nbsport > 1;
1185
1186         push @cmd, "--match multiport" if $multiport;
1187
1188         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1189             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1190
1191         if ($rule->{dport}) {
1192             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1193                 # Note: we use dport to store --icmp-type
1194                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1195                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1196             } else {
1197                 if ($nbdport > 1) {
1198                     if ($multiport == 2) {
1199                         push @cmd,  "--ports $rule->{dport}";
1200                     } else {
1201                         push @cmd, "--dports $rule->{dport}";
1202                     }
1203                 } else {
1204                     push @cmd, "--dport $rule->{dport}";
1205                 }
1206             }
1207         }
1208
1209         if ($rule->{sport}) {
1210             if ($nbsport > 1) {
1211                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1212             } else {
1213                 push @cmd, "--sport $rule->{sport}";
1214             }
1215         }
1216     } elsif ($rule->{dport} || $rule->{sport}) {
1217         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1218         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1219     }
1220
1221     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1222
1223     if (my $action = $rule->{action}) {
1224         $action = $actions->{$action} if defined($actions->{$action});
1225         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1226         push @cmd, $goto ? "-g $action" : "-j $action";
1227     }
1228
1229     return scalar(@cmd) ? join(' ', @cmd) : undef;
1230 }
1231
1232 sub ruleset_generate_rule {
1233     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1234
1235     my $rules;
1236
1237     if ($rule->{macro}) {
1238         $rules = &$apply_macro($rule->{macro}, $rule);
1239     } else {
1240         $rules = [ $rule ];
1241     }
1242
1243     foreach my $tmp (@$rules) {
1244         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1245             ruleset_addrule($ruleset, $chain, $cmdstr);
1246         }
1247     }
1248 }
1249
1250 sub ruleset_generate_rule_insert {
1251     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1252
1253     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1254
1255     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1256         ruleset_insertrule($ruleset, $chain, $cmdstr);
1257     }
1258 }
1259
1260 sub ruleset_create_chain {
1261     my ($ruleset, $chain) = @_;
1262
1263     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1264     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1265
1266     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1267
1268     $ruleset->{$chain} = [];
1269 }
1270
1271 sub ruleset_chain_exist {
1272     my ($ruleset, $chain) = @_;
1273
1274     return $ruleset->{$chain} ? 1 : undef;
1275 }
1276
1277 sub ruleset_addrule {
1278    my ($ruleset, $chain, $rule) = @_;
1279
1280    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1281
1282    push @{$ruleset->{$chain}}, "-A $chain $rule";
1283 }
1284
1285 sub ruleset_insertrule {
1286    my ($ruleset, $chain, $rule) = @_;
1287
1288    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1289
1290    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1291 }
1292
1293 sub get_log_rule_base {
1294     my ($chain, $vmid, $msg, $loglevel) = @_;
1295
1296     die "internal error - no log level" if !defined($loglevel);
1297
1298     $vmid = 0 if !defined($vmid);
1299
1300     # Note: we use special format for prefix to pass further
1301     # info to log daemon (VMID, LOGVELEL and CHAIN)
1302
1303     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1304 }
1305
1306 sub ruleset_addlog {
1307     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1308
1309     return if !defined($loglevel);
1310
1311     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1312
1313     $logrule = "$rule $logrule" if defined($rule);
1314
1315     ruleset_addrule($ruleset, $chain, $logrule)
1316 }
1317
1318 sub generate_bridge_chains {
1319     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1320
1321     my $options = $hostfw_conf->{options} || {};
1322
1323     die "error: detected direct route to bridge '$bridge'\n"
1324         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1325
1326     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1327         ruleset_create_chain($ruleset, "$bridge-FW");
1328         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1329         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1330     }
1331
1332     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1333         ruleset_create_chain($ruleset, "$bridge-OUT");
1334         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1335         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1336     }
1337
1338     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1339         ruleset_create_chain($ruleset, "$bridge-IN");
1340         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1341         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1342         # accept traffic to unmanaged bridge ports
1343         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1344     }
1345 }
1346
1347 sub ruleset_add_chain_policy {
1348     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1349
1350     if ($policy eq 'ACCEPT') {
1351
1352         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1353                               { ACCEPT =>  $accept_action});
1354
1355     } elsif ($policy eq 'DROP') {
1356
1357         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1358
1359         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1360
1361         ruleset_addrule($ruleset, $chain, "-j DROP");
1362     } elsif ($policy eq 'REJECT') {
1363         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1364
1365         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1366
1367         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1368     } else {
1369         # should not happen
1370         die "internal error: unknown policy '$policy'";
1371     }
1372 }
1373
1374 sub ruleset_create_vm_chain {
1375     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1376
1377     ruleset_create_chain($ruleset, $chain);
1378     my $accept = generate_nfqueue($options);
1379
1380     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1381         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1382     }
1383
1384     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1385         if ($direction eq 'OUT') {
1386             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1387                                                       proto => 'udp', sport => 68, dport => 67 });
1388         } else {
1389             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1390                                                       proto => 'udp', sport => 67, dport => 68 });
1391         }
1392     }
1393
1394     if ($options->{tcpflags}) {
1395         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1396     }
1397
1398     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1399     if ($direction eq 'OUT') {
1400         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1401     } else {
1402         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1403     }
1404
1405     if ($direction eq 'OUT') {
1406         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1407             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1408         }
1409         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1410     }
1411 }
1412
1413 sub ruleset_generate_vm_rules {
1414     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1415
1416     my $lc_direction = lc($direction);
1417
1418     foreach my $rule (@$rules) {
1419         next if $rule->{iface} && $rule->{iface} ne $netid;
1420         next if !$rule->{enable};
1421         if ($rule->{type} eq 'group') {
1422             my $group_chain = "GROUP-$rule->{action}-$direction";
1423             if(!ruleset_chain_exist($ruleset, $group_chain)){
1424                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1425             }
1426             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1427             if ($direction eq 'OUT'){
1428                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1429             }else{
1430                 my $accept = generate_nfqueue($options);
1431                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1432             }
1433
1434         } else {
1435             next if $rule->{type} ne $lc_direction;
1436             if ($direction eq 'OUT') {
1437                 ruleset_generate_rule($ruleset, $chain, $rule,
1438                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1439             } else {
1440                 my $accept = generate_nfqueue($options);
1441                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1442             }
1443         }
1444     }
1445 }
1446
1447 sub generate_nfqueue {
1448     my ($options) = @_;
1449
1450     my $action = "";
1451     if($options->{ips}){
1452         $action = "NFQUEUE";
1453         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1454             if(defined($3) && defined($1)) {
1455                 $action .= " --queue-balance $1:$3";
1456             }elsif (defined($1)) {
1457                 $action .= " --queue-num $1";
1458             }
1459         }
1460         $action .= " --queue-bypass";
1461     }else{
1462         $action = "ACCEPT";
1463     }
1464
1465     return $action;
1466 }
1467
1468 sub ruleset_generate_vm_ipsrules {
1469     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1470
1471     if ($options->{ips} && $direction eq 'IN') {
1472         my $nfqueue = generate_nfqueue($options);
1473
1474         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1475             ruleset_create_chain($ruleset, "PVEFW-IPS");
1476         }
1477
1478         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1479             ruleset_create_chain($ruleset, "$bridge-IPS");
1480             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1481         }
1482
1483         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1484     }
1485 }
1486
1487 sub generate_venet_rules_direction {
1488     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1489
1490     parse_address_list($ip); # make sure we have a valid $ip list
1491
1492     my $lc_direction = lc($direction);
1493
1494     my $rules = $vmfw_conf->{rules};
1495
1496     my $options = $vmfw_conf->{options};
1497     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1498
1499     my $chain = "venet0-$vmid-$direction";
1500
1501     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1502
1503     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1504
1505     # implement policy
1506     my $policy;
1507
1508     if ($direction eq 'OUT') {
1509         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1510     } else {
1511         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1512     }
1513
1514     my $accept = generate_nfqueue($options);
1515     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1516     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1517
1518     # plug into FORWARD, INPUT and OUTPUT chain
1519     if ($direction eq 'OUT') {
1520         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1521             action => $chain,
1522             source => $ip,
1523             iface_in => 'venet0'});
1524
1525         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1526             action => $chain,
1527             source => $ip,
1528             iface_in => 'venet0'});
1529     } else {
1530         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1531             action => $chain,
1532             dest => $ip,
1533             iface_out => 'venet0'});
1534
1535         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1536             action => $chain,
1537             dest => $ip,
1538             iface_out => 'venet0'});
1539     }
1540 }
1541
1542 sub generate_tap_rules_direction {
1543     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1544
1545     my $lc_direction = lc($direction);
1546
1547     my $rules = $vmfw_conf->{rules};
1548
1549     my $options = $vmfw_conf->{options};
1550     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1551
1552     my $tapchain = "$iface-$direction";
1553
1554     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1555
1556     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1557
1558     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1559
1560     # implement policy
1561     my $policy;
1562
1563     if ($direction eq 'OUT') {
1564         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1565     } else {
1566         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1567     }
1568
1569     my $accept = generate_nfqueue($options);
1570     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1571     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1572
1573     # plug the tap chain to bridge chain
1574     if ($direction eq 'IN') {
1575         ruleset_insertrule($ruleset, "$bridge-IN",
1576                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1577     } else {
1578         ruleset_insertrule($ruleset, "$bridge-OUT",
1579                            "-m physdev --physdev-in $iface -j $tapchain");
1580     }
1581 }
1582
1583 sub enable_host_firewall {
1584     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1585
1586     # fixme: allow security groups
1587
1588     my $options = $hostfw_conf->{options};
1589     my $rules = $hostfw_conf->{rules};
1590
1591     # host inbound firewall
1592     my $chain = "PVEFW-HOST-IN";
1593     ruleset_create_chain($ruleset, $chain);
1594
1595     my $loglevel = get_option_log_level($options, "log_level_in");
1596
1597     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1598         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1599     }
1600
1601     if ($options->{tcpflags}) {
1602         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1603     }
1604
1605     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1606     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1607     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1608     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1609     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1610     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1611
1612     # we use RETURN because we need to check also tap rules
1613     my $accept_action = 'RETURN';
1614
1615     foreach my $rule (@$rules) {
1616         next if $rule->{type} ne 'in';
1617         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1618     }
1619
1620     # implement input policy
1621     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1622     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1623
1624     # host outbound firewall
1625     $chain = "PVEFW-HOST-OUT";
1626     ruleset_create_chain($ruleset, $chain);
1627
1628     $loglevel = get_option_log_level($options, "log_level_out");
1629
1630     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1631     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1632     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1633     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1634     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1635     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1636
1637     # we use RETURN because we may want to check other thigs later
1638     $accept_action = 'RETURN';
1639
1640     foreach my $rule (@$rules) {
1641         next if $rule->{type} ne 'out';
1642         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1643     }
1644
1645     # implement output policy
1646     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1647     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1648
1649     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1650     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1651 }
1652
1653 sub generate_group_rules {
1654     my ($ruleset, $cluster_conf, $group) = @_;
1655     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1656
1657     my $rules = $cluster_conf->{groups}->{$group};
1658
1659     my $chain = "GROUP-${group}-IN";
1660
1661     ruleset_create_chain($ruleset, $chain);
1662     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1663
1664     foreach my $rule (@$rules) {
1665         next if $rule->{type} ne 'in';
1666         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1667     }
1668
1669     $chain = "GROUP-${group}-OUT";
1670
1671     ruleset_create_chain($ruleset, $chain);
1672     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1673
1674     foreach my $rule (@$rules) {
1675         next if $rule->{type} ne 'out';
1676         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1677         # check also other tap rules later
1678         ruleset_generate_rule($ruleset, $chain, $rule,
1679                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1680     }
1681 }
1682
1683 my $MAX_NETS = 32;
1684 my $valid_netdev_names = {};
1685 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1686     $valid_netdev_names->{"net$i"} = 1;
1687 }
1688
1689 sub parse_fw_rule {
1690     my ($line, $need_iface, $allow_groups) = @_;
1691
1692     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1693
1694     # we can add single line comments to the end of the rule
1695     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1696
1697     # we can disable a rule when prefixed with '|'
1698     my $enable = 1;
1699
1700     $enable = 0 if $line =~ s/^\|//;
1701
1702     my @data = split(/\s+/, $line);
1703     my $expected_elements = $need_iface ? 8 : 7;
1704
1705     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1706
1707     if ($need_iface) {
1708         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1709     } else {
1710         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1711     }
1712
1713     die "incomplete rule\n" if ! ($type && $action);
1714
1715     my $macro;
1716
1717     $type = lc($type);
1718
1719     if ($type eq  'in' || $type eq 'out') {
1720         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1721             # OK
1722         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1723             $action = $2;
1724             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1725             die "unknown macro '$1'\n" if !$preferred_name;
1726             $macro = $preferred_name;
1727         } else {
1728             die "unknown action '$action'\n";
1729         }
1730     } elsif ($type eq 'group') {
1731         die "wrong number of rule elements\n" if scalar(@data) != 3;
1732         die "groups disabled\n" if !$allow_groups;
1733
1734         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1735     } else {
1736         die "unknown rule type '$type'\n";
1737     }
1738
1739     if ($need_iface) {
1740         $iface = undef if $iface && $iface eq '-';
1741     }
1742
1743     $proto = undef if $proto && $proto eq '-';
1744     pve_fw_verify_protocol_spec($proto) if $proto;
1745
1746     $source = undef if $source && $source eq '-';
1747     $dest = undef if $dest && $dest eq '-';
1748
1749     $dport = undef if $dport && $dport eq '-';
1750     $sport = undef if $sport && $sport eq '-';
1751
1752     parse_port_name_number_or_range($dport) if defined($dport);
1753     parse_port_name_number_or_range($sport) if defined($sport);
1754
1755     parse_address_list($source) if $source;
1756     parse_address_list($dest) if $dest;
1757
1758     return {
1759         type => $type,
1760         enable => $enable,
1761         comment => $comment,
1762         action => $action,
1763         macro => $macro,
1764         iface => $iface,
1765         source => $source,
1766         dest => $dest,
1767         proto => $proto,
1768         dport => $dport,
1769         sport => $sport,
1770     };
1771 }
1772
1773 sub parse_vmfw_option {
1774     my ($line) = @_;
1775
1776     my ($opt, $value);
1777
1778     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1779
1780     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1781         $opt = lc($1);
1782         $value = int($2);
1783     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1784         $opt = lc($1);
1785         $value = $2 ? lc($3) : '';
1786     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1787         $opt = lc($1);
1788         $value = uc($3);
1789     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1790         $opt = lc($1);
1791         $value = $2;
1792     } else {
1793         chomp $line;
1794         die "can't parse option '$line'\n"
1795     }
1796
1797     return ($opt, $value);
1798 }
1799
1800 sub parse_hostfw_option {
1801     my ($line) = @_;
1802
1803     my ($opt, $value);
1804
1805     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1806
1807     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1808         $opt = lc($1);
1809         $value = int($2);
1810     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1811         $opt = lc($1);
1812         $value = $2 ? lc($3) : '';
1813     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1814         $opt = lc($1);
1815         $value = uc($3);
1816     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1817         $opt = lc($1);
1818         $value = int($2);
1819     } else {
1820         chomp $line;
1821         die "can't parse option '$line'\n"
1822     }
1823
1824     return ($opt, $value);
1825 }
1826
1827 sub parse_clusterfw_option {
1828     my ($line) = @_;
1829
1830     my ($opt, $value);
1831
1832     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1833         $opt = lc($1);
1834         $value = int($2);
1835     } else {
1836         chomp $line;
1837         die "can't parse option '$line'\n"
1838     }
1839
1840     return ($opt, $value);
1841 }
1842
1843 sub parse_vm_fw_rules {
1844     my ($filename, $fh) = @_;
1845
1846     my $res = { rules => [], options => {}};
1847
1848     my $section;
1849
1850     my $digest = Digest::SHA->new('sha1');
1851
1852     while (defined(my $line = <$fh>)) {
1853         $digest->add($line);
1854
1855         next if $line =~ m/^#/;
1856         next if $line =~ m/^\s*$/;
1857
1858         my $linenr = $fh->input_line_number();
1859         my $prefix = "$filename (line $linenr)";
1860
1861         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1862             $section = lc($1);
1863             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1864             next;
1865         }
1866         if (!$section) {
1867             warn "$prefix: skip line - no section";
1868             next;
1869         }
1870
1871         next if !$res->{$section}; # skip undefined section
1872
1873         if ($section eq 'options') {
1874             eval {
1875                 my ($opt, $value) = parse_vmfw_option($line);
1876                 $res->{options}->{$opt} = $value;
1877             };
1878             warn "$prefix: $@" if $@;
1879             next;
1880         }
1881
1882         my $rule;
1883         eval { $rule = parse_fw_rule($line, 1, 1); };
1884         if (my $err = $@) {
1885             warn "$prefix: $err";
1886             next;
1887         }
1888
1889         push @{$res->{$section}}, $rule;
1890     }
1891
1892     $res->{digest} = $digest->b64digest;
1893
1894     return $res;
1895 }
1896
1897 sub parse_host_fw_rules {
1898     my ($filename, $fh) = @_;
1899
1900     my $res = { rules => [], options => {}};
1901
1902     my $section;
1903
1904     my $digest = Digest::SHA->new('sha1');
1905
1906     while (defined(my $line = <$fh>)) {
1907         $digest->add($line);
1908
1909         next if $line =~ m/^#/;
1910         next if $line =~ m/^\s*$/;
1911
1912         my $linenr = $fh->input_line_number();
1913         my $prefix = "$filename (line $linenr)";
1914
1915         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1916             $section = lc($1);
1917             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1918             next;
1919         }
1920         if (!$section) {
1921             warn "$prefix: skip line - no section";
1922             next;
1923         }
1924
1925         next if !$res->{$section}; # skip undefined section
1926
1927         if ($section eq 'options') {
1928             eval {
1929                 my ($opt, $value) = parse_hostfw_option($line);
1930                 $res->{options}->{$opt} = $value;
1931             };
1932             warn "$prefix: $@" if $@;
1933             next;
1934         }
1935
1936         my $rule;
1937         eval { $rule = parse_fw_rule($line, 1, 1); };
1938         if (my $err = $@) {
1939             warn "$prefix: $err";
1940             next;
1941         }
1942
1943         push @{$res->{$section}}, $rule;
1944     }
1945
1946 $res->{digest} = $digest->b64digest;
1947
1948     return $res;
1949 }
1950
1951 sub parse_cluster_fw_rules {
1952     my ($filename, $fh) = @_;
1953
1954     my $section;
1955     my $group;
1956
1957     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1958
1959     my $digest = Digest::SHA->new('sha1');
1960
1961     while (defined(my $line = <$fh>)) {
1962         $digest->add($line);
1963
1964         next if $line =~ m/^#/;
1965         next if $line =~ m/^\s*$/;
1966
1967         my $linenr = $fh->input_line_number();
1968         my $prefix = "$filename (line $linenr)";
1969
1970         if ($line =~ m/^\[options\]$/i) {
1971             $section = 'options';
1972             next;
1973         }
1974
1975         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1976             $section = 'groups';
1977             $group = lc($1);
1978             next;
1979         }
1980
1981         if ($line =~ m/^\[rules\]$/i) {
1982             $section = 'rules';
1983             next;
1984         }
1985
1986         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1987             $section = 'ipset';
1988             $group = lc($1);
1989             next;
1990         }
1991
1992         if (!$section) {
1993             warn "$prefix: skip line - no section\n";
1994             next;
1995         }
1996
1997         if ($section eq 'options') {
1998             eval {
1999                 my ($opt, $value) = parse_clusterfw_option($line);
2000                 $res->{options}->{$opt} = $value;
2001             };
2002             warn "$prefix: $@" if $@;
2003         } elsif ($section eq 'rules') {
2004             my $rule;
2005             eval { $rule = parse_fw_rule($line, 1, 1); };
2006             if (my $err = $@) {
2007                 warn "$prefix: $err";
2008                 next;
2009             }
2010             push @{$res->{$section}}, $rule;
2011         } elsif ($section eq 'groups') {
2012             my $rule;
2013             eval { $rule = parse_fw_rule($line, 0, 0); };
2014             if (my $err = $@) {
2015                 warn "$prefix: $err";
2016                 next;
2017             }
2018             push @{$res->{$section}->{$group}}, $rule;
2019         } elsif ($section eq 'ipset') {
2020             # we can add single line comments to the end of the rule
2021             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2022
2023             $line =~ m/^(\!)?\s*((?:\d+)\.(?:\d+)\.(?:\d+)\.(?:\d+))(?:\/(\d+))?\s*$/;
2024             my $nomatch = $1;
2025             my $cidr = $2;
2026
2027             $cidr .= "/$3" if defined($3) && $3 != 32;
2028
2029             if (!Net::IP->new($cidr)) {
2030                 my $err = Net::IP::Error();
2031                 warn "$prefix: $cidr - $err\n";
2032                 next;
2033             }
2034
2035             my $entry = { cidr => $cidr };
2036             $entry->{nomatch} = 1 if $nomatch;
2037             $entry->{comment} = $comment if $comment;
2038
2039             push @{$res->{$section}->{$group}}, $entry;
2040         }
2041     }
2042
2043     $res->{digest} = $digest->b64digest;
2044     return $res;
2045 }
2046
2047 sub run_locked {
2048     my ($code, @param) = @_;
2049
2050     my $timeout = 10;
2051
2052     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2053
2054     die $@ if $@;
2055
2056     return $res;
2057 }
2058
2059 sub read_local_vm_config {
2060
2061     my $openvz = {};
2062     my $qemu = {};
2063
2064     my $vmdata = { openvz => $openvz, qemu => $qemu };
2065
2066     my $vmlist = PVE::Cluster::get_vmlist();
2067     return $vmdata if !$vmlist || !$vmlist->{ids};
2068     my $ids = $vmlist->{ids};
2069
2070     foreach my $vmid (keys %$ids) {
2071         next if !$vmid; # skip VE0
2072         my $d = $ids->{$vmid};
2073         next if !$d->{node} || $d->{node} ne $nodename;
2074         next if !$d->{type};
2075         if ($d->{type} eq 'openvz') {
2076             if ($have_pve_manager) {
2077                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2078                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2079                     $openvz->{$vmid} = $conf;
2080                 }
2081             }
2082         } elsif ($d->{type} eq 'qemu') {
2083             if ($have_qemu_server) {
2084                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2085                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2086                     $qemu->{$vmid} = $conf;
2087                 }
2088             }
2089         }
2090     }
2091
2092     return $vmdata;
2093 };
2094
2095 sub load_vmfw_conf {
2096     my ($vmid) = @_;
2097
2098     my $vmfw_conf = {};
2099
2100     my $filename = "/etc/pve/firewall/$vmid.fw";
2101     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2102         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2103     }
2104
2105     return $vmfw_conf;
2106 }
2107
2108 my $format_rules = sub {
2109     my ($rules, $need_iface) = @_;
2110
2111     my $raw = '';
2112
2113     foreach my $rule (@$rules) {
2114         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2115             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2116             $raw .= uc($rule->{type});
2117             if ($rule->{macro}) {
2118                 $raw .= " $rule->{macro}($rule->{action})";
2119             } else {
2120                 $raw .= " " . $rule->{action};
2121             }
2122             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2123             $raw .= " " . ($rule->{source} || '-');
2124             $raw .= " " . ($rule->{dest} || '-');
2125             $raw .= " " . ($rule->{proto} || '-');
2126             $raw .= " " . ($rule->{dport} || '-');
2127             $raw .= " " . ($rule->{sport} || '-');
2128             $raw .= " # " . encode('utf8', $rule->{comment})
2129                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2130             $raw .= "\n";
2131         } else {
2132             die "implement me '$rule->{type}'";
2133         }
2134     }
2135
2136     return $raw;
2137 };
2138
2139 my $format_options = sub {
2140     my ($options) = @_;
2141
2142     my $raw = '';
2143
2144     $raw .= "[OPTIONS]\n\n";
2145     foreach my $opt (keys %$options) {
2146         $raw .= "$opt: $options->{$opt}\n";
2147     }
2148     $raw .= "\n";
2149
2150     return $raw;
2151 };
2152
2153 my $format_ipset = sub {
2154     my ($options) = @_;
2155
2156     my $raw = '';
2157
2158     my $nethash = {};
2159     foreach my $entry (@$options) {
2160         $nethash->{$entry->{cidr}} = $entry;
2161     }
2162
2163     foreach my $cidr (sort keys %$nethash) {
2164         my $entry = $nethash->{$cidr};
2165         my $line = $entry->{nomatch} ? '!' : '';
2166         $line .= $entry->{cidr};
2167         $line .= " # " . encode('utf8', $entry->{comment})
2168             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2169         $raw .= "$line\n";
2170     }
2171
2172     return $raw;
2173 };
2174
2175 sub save_vmfw_conf {
2176     my ($vmid, $vmfw_conf) = @_;
2177
2178     my $raw = '';
2179
2180     my $options = $vmfw_conf->{options};
2181     $raw .= &$format_options($options) if scalar(keys %$options);
2182
2183     my $rules = $vmfw_conf->{rules};
2184     if (scalar(@$rules)) {
2185         $raw .= "[RULES]\n\n";
2186         $raw .= &$format_rules($rules, 1);
2187         $raw .= "\n";
2188     }
2189
2190     my $filename = "/etc/pve/firewall/$vmid.fw";
2191     PVE::Tools::file_set_contents($filename, $raw);
2192 }
2193
2194 sub read_vm_firewall_configs {
2195     my ($vmdata) = @_;
2196     my $vmfw_configs = {};
2197
2198     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2199         my $vmfw_conf = load_vmfw_conf($vmid);
2200         next if !$vmfw_conf->{options}; # skip if file does not exists
2201         $vmfw_configs->{$vmid} = $vmfw_conf;
2202     }
2203
2204     return $vmfw_configs;
2205 }
2206
2207 sub get_option_log_level {
2208     my ($options, $k) = @_;
2209
2210     my $v = $options->{$k};
2211     $v = $default_log_level if !defined($v);
2212
2213     return undef if $v eq '' || $v eq 'nolog';
2214
2215     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2216
2217     return $v if ($v >= 0) && ($v <= 7);
2218
2219     warn "unknown log level ($k = '$v')\n";
2220
2221     return undef;
2222 }
2223
2224 sub generate_std_chains {
2225     my ($ruleset, $options) = @_;
2226
2227     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2228
2229     # same as shorewall smurflog.
2230     my $chain = 'PVEFW-smurflog';
2231
2232     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2233     push @{$pve_std_chains->{$chain}}, "-j DROP";
2234
2235     # same as shorewall logflags action.
2236     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2237     $chain = 'PVEFW-logflags';
2238     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2239     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2240     push @{$pve_std_chains->{$chain}}, "-j DROP";
2241
2242     foreach my $chain (keys %$pve_std_chains) {
2243         ruleset_create_chain($ruleset, $chain);
2244         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2245             if (ref($rule)) {
2246                 ruleset_generate_rule($ruleset, $chain, $rule);
2247             } else {
2248                 ruleset_addrule($ruleset, $chain, $rule);
2249             }
2250         }
2251     }
2252 }
2253
2254 sub generate_ipset_chains {
2255     my ($ipset_ruleset, $fw_conf) = @_;
2256
2257     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2258         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2259     }
2260 }
2261
2262 sub generate_ipset {
2263     my ($ipset_ruleset, $name, $options) = @_;
2264
2265     my $hashsize = scalar(@$options);
2266     if ($hashsize <= 64) {
2267         $hashsize = 64;
2268     } else {
2269         $hashsize = round_powerof2($hashsize);
2270     }
2271
2272     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2273
2274     foreach my $entry (@$options) {
2275         my $cidr = $entry->{cidr};
2276         my $cmd = "add $name $cidr";
2277         if ($entry->{nomatch}) {
2278             if ($feature_ipset_nomatch) {
2279                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2280             } else {
2281                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2282             }
2283         } else {
2284             push @{$ipset_ruleset->{$name}}, $cmd;
2285         }
2286     }
2287 }
2288
2289 sub round_powerof2 {
2290     my ($int) = @_;
2291
2292     $int--;
2293     $int |= $int >> $_ foreach (1,2,4,8,16);
2294     return ++$int;
2295 }
2296
2297 sub save_pvefw_status {
2298     my ($status) = @_;
2299
2300     die "unknown status '$status' - internal error"
2301         if $status !~ m/^(stopped|active)$/;
2302
2303     mkdir dirname($pve_fw_status_filename);
2304     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2305 }
2306
2307 sub read_pvefw_status {
2308
2309     my $status = 'unknown';
2310
2311     return 'stopped' if ! -f $pve_fw_status_filename;
2312
2313     eval {
2314         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2315     };
2316     warn $@ if $@;
2317
2318     return $status;
2319 }
2320
2321 # fixme: move to pve-common PVE::ProcFSTools
2322 sub read_proc_net_route {
2323     my $filename = "/proc/net/route";
2324
2325     my $res = {};
2326
2327     my $fh = IO::File->new ($filename, "r");
2328     return $res if !$fh;
2329
2330     my $int_to_quad = sub {
2331         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2332     };
2333
2334     while (defined(my $line = <$fh>)) {
2335         next if $line =~/^Iface\s+Destination/; # skip head
2336         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2337         push @{$res->{$iface}}, {
2338             dest => &$int_to_quad(hex($dest)),
2339             gateway => &$int_to_quad(hex($gateway)),
2340             mask => &$int_to_quad(hex($mask)),
2341             metric => $metric,
2342             mtu => $mtu,
2343         };
2344     }
2345
2346     return $res;
2347 }
2348
2349 sub load_clusterfw_conf {
2350
2351     my $cluster_conf = {};
2352      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2353         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2354     }
2355
2356     return $cluster_conf;
2357 }
2358
2359 sub save_clusterfw_conf {
2360     my ($cluster_conf) = @_;
2361
2362     my $raw = '';
2363
2364     my $options = $cluster_conf->{options};
2365     $raw .= &$format_options($options) if scalar(keys %$options);
2366
2367     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2368         $raw .= "[IPSET $ipset]\n\n";
2369         my $options = $cluster_conf->{ipset}->{$ipset};
2370         $raw .= &$format_ipset($options);
2371         $raw .= "\n";
2372     }
2373
2374     my $rules = $cluster_conf->{rules};
2375     if (scalar(@$rules)) {
2376         $raw .= "[RULES]\n\n";
2377         $raw .= &$format_rules($rules, 1);
2378         $raw .= "\n";
2379     }
2380
2381     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2382         my $rules = $cluster_conf->{groups}->{$group};
2383         $raw .= "[group $group]\n\n";
2384         $raw .= &$format_rules($rules, 0);
2385         $raw .= "\n";
2386     }
2387
2388     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2389 }
2390
2391 sub load_hostfw_conf {
2392
2393     my $hostfw_conf = {};
2394     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2395         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2396     }
2397     return $hostfw_conf;
2398 }
2399
2400 sub save_hostfw_conf {
2401     my ($hostfw_conf) = @_;
2402
2403     my $raw = '';
2404
2405     my $options = $hostfw_conf->{options};
2406     $raw .= &$format_options($options) if scalar(keys %$options);
2407
2408     my $rules = $hostfw_conf->{rules};
2409     if (scalar(@$rules)) {
2410         $raw .= "[RULES]\n\n";
2411         $raw .= &$format_rules($rules, 1);
2412         $raw .= "\n";
2413     }
2414
2415     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2416 }
2417
2418 sub compile {
2419     my $vmdata = read_local_vm_config();
2420     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2421
2422     my $routing_table = read_proc_net_route();
2423
2424     my $cluster_conf = load_clusterfw_conf();
2425
2426     my $ipset_ruleset = {};
2427     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2428
2429     my $ruleset = {};
2430
2431     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2432     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2433
2434     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2435
2436     my $hostfw_conf = load_hostfw_conf();
2437     my $hostfw_options = $hostfw_conf->{options} || {};
2438
2439     generate_std_chains($ruleset, $hostfw_options);
2440
2441     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2442
2443     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2444
2445     # generate firewall rules for QEMU VMs
2446     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2447         my $conf = $vmdata->{qemu}->{$vmid};
2448         my $vmfw_conf = $vmfw_configs->{$vmid};
2449         next if !$vmfw_conf;
2450         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2451
2452         foreach my $netid (keys %$conf) {
2453             next if $netid !~ m/^net(\d+)$/;
2454             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2455             next if !$net;
2456             my $iface = "tap${vmid}i$1";
2457
2458             my $bridge = $net->{bridge};
2459             next if !$bridge; # fixme: ?
2460
2461             $bridge .= "v$net->{tag}" if $net->{tag};
2462
2463             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2464
2465             my $macaddr = $net->{macaddr};
2466             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2467                                          $vmfw_conf, $vmid, $bridge, 'IN');
2468             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2469                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2470         }
2471     }
2472
2473     # generate firewall rules for OpenVZ containers
2474     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2475         my $conf = $vmdata->{openvz}->{$vmid};
2476
2477         my $vmfw_conf = $vmfw_configs->{$vmid};
2478         next if !$vmfw_conf;
2479         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2480
2481         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2482             my $ip = $conf->{ip_address}->{value};
2483             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2484             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2485         }
2486
2487         if ($conf->{netif} && $conf->{netif}->{value}) {
2488             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2489             foreach my $netid (keys %$netif) {
2490                 my $d = $netif->{$netid};
2491                 my $bridge = $d->{bridge};
2492                 if (!$bridge) {
2493                     warn "no bridge device for CT $vmid iface '$netid'\n";
2494                     next; # fixme?
2495                 }
2496
2497                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2498
2499                 my $macaddr = $d->{mac};
2500                 my $iface = $d->{host_ifname};
2501                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2502                                              $vmfw_conf, $vmid, $bridge, 'IN');
2503                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2504                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2505             }
2506         }
2507     }
2508
2509     if($hostfw_options->{optimize}){
2510
2511         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2512         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2513         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2514     }
2515
2516     # fixme: what log level should we use here?
2517     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2518
2519     # fixme: should we really block inter-bridge traffic?
2520
2521     # always allow traffic from containers?
2522     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2523
2524     # disable interbridge routing
2525     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2526     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2527     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2528     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2529     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2530     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2531
2532     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2533 }
2534
2535 sub get_ruleset_status {
2536     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2537
2538     my $statushash = {};
2539
2540     foreach my $chain (sort keys %$ruleset) {
2541         my $sig = &$digest_fn($ruleset->{$chain});
2542
2543         $statushash->{$chain}->{sig} = $sig;
2544
2545         my $oldsig = $active_chains->{$chain};
2546         if (!defined($oldsig)) {
2547             $statushash->{$chain}->{action} = 'create';
2548         } else {
2549             if ($oldsig eq $sig) {
2550                 $statushash->{$chain}->{action} = 'exists';
2551             } else {
2552                 $statushash->{$chain}->{action} = 'update';
2553             }
2554         }
2555         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2556         foreach my $cmd (@{$ruleset->{$chain}}) {
2557             print "\t$cmd\n" if $verbose;
2558         }
2559     }
2560
2561     foreach my $chain (sort keys %$active_chains) {
2562         if (!defined($ruleset->{$chain})) {
2563             my $sig = $active_chains->{$chain};
2564             $statushash->{$chain}->{action} = 'delete';
2565             $statushash->{$chain}->{sig} = $sig;
2566             print "delete $chain ($sig)\n" if $verbose;
2567         }
2568     }
2569
2570     return $statushash;
2571 }
2572
2573 sub print_sig_rule {
2574     my ($chain, $sig) = @_;
2575
2576     # We just use this to store a SHA1 checksum used to detect changes
2577     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2578 }
2579
2580 sub get_ruleset_cmdlist {
2581     my ($ruleset, $verbose) = @_;
2582
2583     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2584
2585     my ($active_chains, $hooks) = iptables_get_chains();
2586     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2587
2588     # create missing chains first
2589     foreach my $chain (sort keys %$ruleset) {
2590         my $stat = $statushash->{$chain};
2591         die "internal error" if !$stat;
2592         next if $stat->{action} ne 'create';
2593
2594         $cmdlist .= ":$chain - [0:0]\n";
2595     }
2596
2597     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2598         if (!$hooks->{$h}) {
2599             $cmdlist .= "-A $h -j PVEFW-$h\n";
2600         }
2601     }
2602
2603     foreach my $chain (sort keys %$ruleset) {
2604         my $stat = $statushash->{$chain};
2605         die "internal error" if !$stat;
2606
2607         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2608             $cmdlist .= "-F $chain\n";
2609             foreach my $cmd (@{$ruleset->{$chain}}) {
2610                 $cmdlist .= "$cmd\n";
2611             }
2612             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2613         } elsif ($stat->{action} eq 'delete') {
2614             die "internal error"; # this should not happen
2615         } elsif ($stat->{action} eq 'exists') {
2616             # do nothing
2617         } else {
2618             die "internal error - unknown status '$stat->{action}'";
2619         }
2620     }
2621
2622     foreach my $chain (keys %$statushash) {
2623         next if $statushash->{$chain}->{action} ne 'delete';
2624         $cmdlist .= "-F $chain\n";
2625     }
2626     foreach my $chain (keys %$statushash) {
2627         next if $statushash->{$chain}->{action} ne 'delete';
2628         next if $chain eq 'PVEFW-INPUT';
2629         next if $chain eq 'PVEFW-OUTPUT';
2630         next if $chain eq 'PVEFW-FORWARD';
2631         $cmdlist .= "-X $chain\n";
2632     }
2633
2634     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2635
2636     $cmdlist .= "COMMIT\n";
2637
2638     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2639 }
2640
2641 sub get_ipset_cmdlist {
2642     my ($ruleset, $verbose) = @_;
2643
2644     my $cmdlist = "";
2645
2646     my $delete_cmdlist = "";
2647
2648     my $active_chains = ipset_get_chains();
2649     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2650
2651     foreach my $chain (sort keys %$ruleset) {
2652         my $stat = $statushash->{$chain};
2653         die "internal error" if !$stat;
2654
2655         if ($stat->{action} eq 'create') {
2656             foreach my $cmd (@{$ruleset->{$chain}}) {
2657                 $cmdlist .= "$cmd\n";
2658             }
2659         }
2660
2661         if ($stat->{action} eq 'update') {
2662             my $chain_swap = $chain."_swap";
2663
2664             foreach my $cmd (@{$ruleset->{$chain}}) {
2665                 $cmd =~ s/$chain/$chain_swap/;
2666                 $cmdlist .= "$cmd\n";
2667             }
2668             $cmdlist .= "swap $chain_swap $chain\n";
2669             $cmdlist .= "flush $chain_swap\n";
2670             $cmdlist .= "destroy $chain_swap\n";
2671         }
2672
2673     }
2674
2675     foreach my $chain (keys %$statushash) {
2676         next if $statushash->{$chain}->{action} ne 'delete';
2677
2678         $delete_cmdlist .= "flush $chain\n";
2679         $delete_cmdlist .= "destroy $chain\n";
2680     }
2681
2682     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2683
2684     return ($cmdlist, $delete_cmdlist, $changes);
2685 }
2686
2687 sub apply_ruleset {
2688     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2689
2690     enable_bridge_firewall();
2691
2692     update_nf_conntrack_max($hostfw_conf);
2693
2694     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2695         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2696
2697     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2698
2699     if ($verbose) {
2700         if ($ipset_changes) {
2701             print "ipset changes:\n";
2702             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2703             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2704         }
2705
2706         if ($changes) {
2707             print "iptables changes:\n";
2708             print $cmdlist;
2709         }
2710     }
2711
2712     ipset_restore_cmdlist($ipset_create_cmdlist);
2713
2714     iptables_restore_cmdlist($cmdlist);
2715
2716     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2717
2718     # test: re-read status and check if everything is up to date
2719     my $active_chains = iptables_get_chains();
2720     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2721
2722     my $errors;
2723     foreach my $chain (sort keys %$ruleset) {
2724         my $stat = $statushash->{$chain};
2725         if ($stat->{action} ne 'exists') {
2726             warn "unable to update chain '$chain'\n";
2727             $errors = 1;
2728         }
2729     }
2730
2731     die "unable to apply firewall changes\n" if $errors;
2732 }
2733
2734 sub update_nf_conntrack_max {
2735     my ($hostfw_conf) = @_;
2736
2737     my $max = 65536; # reasonable default
2738
2739     my $options = $hostfw_conf->{options} || {};
2740
2741     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2742         $max = $options->{nf_conntrack_max};
2743         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2744     }
2745
2746     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2747     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2748
2749     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2750
2751     if ($current != $max) {
2752         my $hashsize = int($max/4);
2753         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2754         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2755     }
2756 }
2757
2758 sub remove_pvefw_chains {
2759
2760     my ($chash, $hooks) = iptables_get_chains();
2761     my $cmdlist = "*filter\n";
2762
2763     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2764         if ($hooks->{$h}) {
2765             $cmdlist .= "-D $h -j PVEFW-$h\n";
2766         }
2767     }
2768
2769     foreach my $chain (keys %$chash) {
2770         $cmdlist .= "-F $chain\n";
2771     }
2772
2773     foreach my $chain (keys %$chash) {
2774         $cmdlist .= "-X $chain\n";
2775     }
2776     $cmdlist .= "COMMIT\n";
2777
2778     iptables_restore_cmdlist($cmdlist);
2779 }
2780
2781 sub update {
2782     my ($start, $verbose) = @_;
2783
2784     my $code = sub {
2785         my $status = read_pvefw_status();
2786
2787         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2788
2789         if ($start || $status eq 'active') {
2790
2791             save_pvefw_status('active') if ($status ne 'active');
2792
2793             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2794         } else {
2795             print "Firewall not active (status = $status)\n" if $verbose;
2796         }
2797     };
2798
2799     run_locked($code);
2800 }
2801
2802
2803 1;