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(register_standard_option 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!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 my $security_group_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  60
  61 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  62     description => "Security Group name.",
  63     type => 'string',
  64     pattern => $security_group_pattern,
  65     minLength => 2,
  66     maxLength => 20,
  67 });
  68
  69 my $feature_ipset_nomatch = 0;
  70 eval  {
  71     my (undef, undef, $release) = POSIX::uname();
  72     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  73         my ($major, $minor) = ($1, $2);
  74         $feature_ipset_nomatch = 1 if ($major > 3) ||
  75             ($major == 3 && $minor >= 7);
  76     }
  77
  78 };
  79
  80 use Data::Dumper;
  81
  82 my $nodename = PVE::INotify::nodename();
  83
  84 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  85 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  86
  87 my $default_log_level = 'info';
  88
  89 my $log_level_hash = {
  90     debug => 7,
  91     info => 6,
  92     notice => 5,
  93     warning => 4,
  94     err => 3,
  95     crit => 2,
  96     alert => 1,
  97     emerg => 0,
  98 };
  99
 100 # imported/converted from: /usr/share/shorewall/macro.*
 101 my $pve_fw_macros = {
 102     'Amanda' => [
 103         "Amanda Backup",
 104         { action => 'PARAM', proto => 'udp', dport => '10080' },
 105         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 106     ],
 107     'Auth' => [
 108         "Auth (identd) traffic",
 109         { action => 'PARAM', proto => 'tcp', dport => '113' },
 110     ],
 111     'BGP' => [
 112         "Border Gateway Protocol traffic",
 113         { action => 'PARAM', proto => 'tcp', dport => '179' },
 114     ],
 115     'BitTorrent' => [
 116         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 117         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 118         { action => 'PARAM', proto => 'udp', dport => '6881' },
 119     ],
 120     'BitTorrent32' => [
 121         "BitTorrent traffic for BitTorrent 3.2 and later",
 122         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 123         { action => 'PARAM', proto => 'udp', dport => '6881' },
 124     ],
 125     'CVS' => [
 126         "Concurrent Versions System pserver traffic",
 127         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 128     ],
 129     'Citrix' => [
 130         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 131         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 132         { action => 'PARAM', proto => 'udp', dport => '1604' },
 133         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 134     ],
 135     'DAAP' => [
 136         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 137         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 138         { action => 'PARAM', proto => 'udp', dport => '3689' },
 139     ],
 140     'DCC' => [
 141         "Distributed Checksum Clearinghouse spam filtering mechanism",
 142         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 143     ],
 144     'DHCPfwd' => [
 145         "Forwarded DHCP traffic (bidirectional)",
 146         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 147         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 148     ],
 149     'DNS' => [
 150         "Domain Name System traffic (upd and tcp)",
 151         { action => 'PARAM', proto => 'udp', dport => '53' },
 152         { action => 'PARAM', proto => 'tcp', dport => '53' },
 153     ],
 154     'Distcc' => [
 155         "Distributed Compiler service",
 156         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 157     ],
 158     'FTP' => [
 159         "File Transfer Protocol",
 160         { action => 'PARAM', proto => 'tcp', dport => '21' },
 161     ],
 162     'Finger' => [
 163         "Finger protocol (RFC 742)",
 164         { action => 'PARAM', proto => 'tcp', dport => '79' },
 165     ],
 166     'GNUnet' => [
 167         "GNUnet secure peer-to-peer networking traffic",
 168         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 169         { action => 'PARAM', proto => 'udp', dport => '2086' },
 170         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 171         { action => 'PARAM', proto => 'udp', dport => '1080' },
 172     ],
 173     'GRE' => [
 174         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 175         { action => 'PARAM', proto => '47' },
 176         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 177     ],
 178     'Git' => [
 179         "Git distributed revision control traffic",
 180         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 181     ],
 182     'HKP' => [
 183         "OpenPGP HTTP keyserver protocol traffic",
 184         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 185     ],
 186     'HTTP' => [
 187         "Hypertext Transfer Protocol (WWW)",
 188         { action => 'PARAM', proto => 'tcp', dport => '80' },
 189     ],
 190     'HTTPS' => [
 191         "Hypertext Transfer Protocol (WWW) over SSL",
 192         { action => 'PARAM', proto => 'tcp', dport => '443' },
 193     ],
 194     'ICPV2' => [
 195         "Internet Cache Protocol V2 (Squid) traffic",
 196         { action => 'PARAM', proto => 'udp', dport => '3130' },
 197     ],
 198     'ICQ' => [
 199         "AOL Instant Messenger traffic",
 200         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 201     ],
 202     'IMAP' => [
 203         "Internet Message Access Protocol",
 204         { action => 'PARAM', proto => 'tcp', dport => '143' },
 205     ],
 206     'IMAPS' => [
 207         "Internet Message Access Protocol over SSL",
 208         { action => 'PARAM', proto => 'tcp', dport => '993' },
 209     ],
 210     'IPIP' => [
 211         "IPIP capsulation traffic (bidirectional)",
 212         { action => 'PARAM', proto => '94' },
 213         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 214     ],
 215     'IPsec' => [
 216         "IPsec traffic (bidirectional)",
 217         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 218         { action => 'PARAM', proto => '50' },
 219         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 220         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 221     ],
 222     'IPsecah' => [
 223         "IPsec authentication (AH) traffic (bidirectional)",
 224         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 225         { action => 'PARAM', proto => '51' },
 226         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 227         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 228     ],
 229     'IPsecnat' => [
 230         "IPsec traffic and Nat-Traversal (bidirectional)",
 231         { action => 'PARAM', proto => 'udp', dport => '500' },
 232         { action => 'PARAM', proto => 'udp', dport => '4500' },
 233         { action => 'PARAM', proto => '50' },
 234         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 235         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 236         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 237     ],
 238     'IRC' => [
 239         "Internet Relay Chat traffic",
 240         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 241     ],
 242     'Jetdirect' => [
 243         "HP Jetdirect printing",
 244         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 245     ],
 246     'L2TP' => [
 247         "Layer 2 Tunneling Protocol traffic",
 248         { action => 'PARAM', proto => 'udp', dport => '1701' },
 249         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 250     ],
 251     'LDAP' => [
 252         "Lightweight Directory Access Protocol traffic",
 253         { action => 'PARAM', proto => 'tcp', dport => '389' },
 254     ],
 255     'LDAPS' => [
 256         "Secure Lightweight Directory Access Protocol traffic",
 257         { action => 'PARAM', proto => 'tcp', dport => '636' },
 258     ],
 259     'MSNP' => [
 260         "Microsoft Notification Protocol",
 261         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 262     ],
 263     'MSSQL' => [
 264         "Microsoft SQL Server",
 265         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 266     ],
 267     'Mail' => [
 268         "Mail traffic (SMTP, SMTPS, Submission)",
 269         { action => 'PARAM', proto => 'tcp', dport => '25' },
 270         { action => 'PARAM', proto => 'tcp', dport => '465' },
 271         { action => 'PARAM', proto => 'tcp', dport => '587' },
 272     ],
 273     'Munin' => [
 274         "Munin networked resource monitoring traffic",
 275         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 276     ],
 277     'MySQL' => [
 278         "MySQL server",
 279         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 280     ],
 281     'NNTP' => [
 282         "NNTP traffic (Usenet).",
 283         { action => 'PARAM', proto => 'tcp', dport => '119' },
 284     ],
 285     'NNTPS' => [
 286         "Encrypted NNTP traffic (Usenet)",
 287         { action => 'PARAM', proto => 'tcp', dport => '563' },
 288     ],
 289     'NTP' => [
 290         "Network Time Protocol (ntpd)",
 291         { action => 'PARAM', proto => 'udp', dport => '123' },
 292     ],
 293     'NTPbi' => [
 294         "Bi-directional NTP (for NTP peers)",
 295         { action => 'PARAM', proto => 'udp', dport => '123' },
 296         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 297     ],
 298     'OSPF' => [
 299         "OSPF multicast traffic",
 300         { action => 'PARAM', proto => '89' },
 301     ],
 302     'OpenVPN' => [
 303         "OpenVPN traffic",
 304         { action => 'PARAM', proto => 'udp', dport => '1194' },
 305     ],
 306     'PCA' => [
 307         "Symantec PCAnywere (tm)",
 308         { action => 'PARAM', proto => 'udp', dport => '5632' },
 309         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 310     ],
 311     'POP3' => [
 312         "POP3 traffic",
 313         { action => 'PARAM', proto => 'tcp', dport => '110' },
 314     ],
 315     'POP3S' => [
 316         "Encrypted POP3 traffic",
 317         { action => 'PARAM', proto => 'tcp', dport => '995' },
 318     ],
 319     'PPtP' => [
 320         "Point-to-Point Tunneling Protocol",
 321         { action => 'PARAM', proto => '47' },
 322         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 323         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 324     ],
 325     'Ping' => [
 326         "ICMP echo request",
 327         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 328     ],
 329     'PostgreSQL' => [
 330         "PostgreSQL server",
 331         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 332     ],
 333     'Printer' => [
 334         "Line Printer protocol printing",
 335         { action => 'PARAM', proto => 'tcp', dport => '515' },
 336     ],
 337     'RDP' => [
 338         "Microsoft Remote Desktop Protocol traffic",
 339         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 340     ],
 341     'RIPbi' => [
 342         "Routing Information Protocol (bidirectional)",
 343         { action => 'PARAM', proto => 'udp', dport => '520' },
 344         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 345     ],
 346     'RNDC' => [
 347         "BIND remote management protocol",
 348         { action => 'PARAM', proto => 'tcp', dport => '953' },
 349     ],
 350     'Razor' => [
 351         "Razor Antispam System",
 352         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 353     ],
 354     'Rdate' => [
 355         "Remote time retrieval (rdate)",
 356         { action => 'PARAM', proto => 'tcp', dport => '37' },
 357     ],
 358     'Rsync' => [
 359         "Rsync server",
 360         { action => 'PARAM', proto => 'tcp', dport => '873' },
 361     ],
 362     'SANE' => [
 363         "SANE network scanning",
 364         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 365     ],
 366     'SMB' => [
 367         "Microsoft SMB traffic",
 368         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 369         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 370         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 371         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 372     ],
 373     'SMBBI' => [
 374         "Microsoft SMB traffic (bidirectional)",
 375         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 376         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 377         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 378         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 379         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 380         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 381         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 382         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 383     ],
 384     'SMBswat' => [
 385         "Samba Web Administration Tool",
 386         { action => 'PARAM', proto => 'tcp', dport => '901' },
 387     ],
 388     'SMTP' => [
 389         "Simple Mail Transfer Protocol",
 390         { action => 'PARAM', proto => 'tcp', dport => '25' },
 391     ],
 392     'SMTPS' => [
 393         "Encrypted Simple Mail Transfer Protocol",
 394         { action => 'PARAM', proto => 'tcp', dport => '465' },
 395     ],
 396     'SNMP' => [
 397         "Simple Network Management Protocol",
 398         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 399         { action => 'PARAM', proto => 'tcp', dport => '161' },
 400     ],
 401     'SPAMD' => [
 402         "Spam Assassin SPAMD traffic",
 403         { action => 'PARAM', proto => 'tcp', dport => '783' },
 404     ],
 405     'SSH' => [
 406         "Secure shell traffic",
 407         { action => 'PARAM', proto => 'tcp', dport => '22' },
 408     ],
 409     'SVN' => [
 410         "Subversion server (svnserve)",
 411         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 412     ],
 413     'SixXS' => [
 414         "SixXS IPv6 Deployment and Tunnel Broker",
 415         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 416         { action => 'PARAM', proto => 'udp', dport => '3740' },
 417         { action => 'PARAM', proto => '41' },
 418         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 419     ],
 420     'Squid' => [
 421         "Squid web proxy traffic",
 422         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 423     ],
 424     'Submission' => [
 425         "Mail message submission traffic",
 426         { action => 'PARAM', proto => 'tcp', dport => '587' },
 427     ],
 428     'Syslog' => [
 429         "Syslog protocol (RFC 5424) traffic",
 430         { action => 'PARAM', proto => 'udp', dport => '514' },
 431         { action => 'PARAM', proto => 'tcp', dport => '514' },
 432     ],
 433     'TFTP' => [
 434         "Trivial File Transfer Protocol traffic",
 435         { action => 'PARAM', proto => 'udp', dport => '69' },
 436     ],
 437     'Telnet' => [
 438         "Telnet traffic",
 439         { action => 'PARAM', proto => 'tcp', dport => '23' },
 440     ],
 441     'Telnets' => [
 442         "Telnet over SSL",
 443         { action => 'PARAM', proto => 'tcp', dport => '992' },
 444     ],
 445     'Time' => [
 446         "RFC 868 Time protocol",
 447         { action => 'PARAM', proto => 'tcp', dport => '37' },
 448     ],
 449     'Trcrt' => [
 450         "Traceroute (for up to 30 hops) traffic",
 451         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 452         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 453     ],
 454     'VNC' => [
 455         "VNC traffic for VNC display's 0 - 9",
 456         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 457     ],
 458     'VNCL' => [
 459         "VNC traffic from Vncservers to Vncviewers in listen mode",
 460         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 461     ],
 462     'Web' => [
 463         "WWW traffic (HTTP and HTTPS)",
 464         { action => 'PARAM', proto => 'tcp', dport => '80' },
 465         { action => 'PARAM', proto => 'tcp', dport => '443' },
 466     ],
 467     'Webcache' => [
 468         "Web Cache/Proxy traffic (port 8080)",
 469         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 470     ],
 471     'Webmin' => [
 472         "Webmin traffic",
 473         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 474     ],
 475     'Whois' => [
 476         "Whois (nicname, RFC 3912) traffic",
 477         { action => 'PARAM', proto => 'tcp', dport => '43' },
 478     ],
 479 };
 480
 481 my $pve_fw_parsed_macros;
 482 my $pve_fw_macro_descr;
 483 my $pve_fw_preferred_macro_names = {};
 484
 485 my $pve_std_chains = {
 486     'PVEFW-SET-ACCEPT-MARK' => [
 487         "-j MARK --set-mark 1",
 488     ],
 489     'PVEFW-DropBroadcast' => [
 490         # same as shorewall 'Broadcast'
 491         # simply DROP BROADCAST/MULTICAST/ANYCAST
 492         # we can use this to reduce logging
 493         { action => 'DROP', dsttype => 'BROADCAST' },
 494         { action => 'DROP', dsttype => 'MULTICAST' },
 495         { action => 'DROP', dsttype => 'ANYCAST' },
 496         { action => 'DROP', dest => '224.0.0.0/4' },
 497     ],
 498     'PVEFW-reject' => [
 499         # same as shorewall 'reject'
 500         { action => 'DROP', dsttype => 'BROADCAST' },
 501         { action => 'DROP', source => '224.0.0.0/4' },
 502         { action => 'DROP', proto => 'icmp' },
 503         "-p tcp -j REJECT --reject-with tcp-reset",
 504         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 505         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 506         "-j REJECT --reject-with icmp-host-prohibited",
 507     ],
 508     'PVEFW-Drop' => [
 509         # same as shorewall 'Drop', which is equal to DROP,
 510         # but REJECT/DROP some packages to reduce logging,
 511         # and ACCEPT critical ICMP types
 512         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 513         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 514         { action => 'PVEFW-DropBroadcast' },
 515         # ACCEPT critical ICMP types
 516         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 517         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 518         # Drop packets with INVALID state
 519         "-m conntrack --ctstate INVALID -j DROP",
 520         # Drop Microsoft SMB noise
 521         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 522         { action => 'DROP', proto => 'udp', dport => '137:139'},
 523         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 524         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 525         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 526         # Drop new/NotSyn traffic so that it doesn't get logged
 527         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 528         # Drop DNS replies
 529         { action => 'DROP', proto => 'udp', sport => 53 },
 530     ],
 531     'PVEFW-Reject' => [
 532         # same as shorewall 'Reject', which is equal to Reject,
 533         # but REJECT/DROP some packages to reduce logging,
 534         # and ACCEPT critical ICMP types
 535         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 536         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 537         { action => 'PVEFW-DropBroadcast' },
 538         # ACCEPT critical ICMP types
 539         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 540         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 541         # Drop packets with INVALID state
 542         "-m conntrack --ctstate INVALID -j DROP",
 543         # Drop Microsoft SMB noise
 544         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 545         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 546         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 547         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 548         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 549         # Drop new/NotSyn traffic so that it doesn't get logged
 550         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 551         # Drop DNS replies
 552         { action => 'DROP', proto => 'udp', sport => 53 },
 553     ],
 554     'PVEFW-tcpflags' => [
 555         # same as shorewall tcpflags action.
 556         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 557         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 558         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 559         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 560         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 561         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 562     ],
 563     'PVEFW-smurfs' => [
 564         # same as shorewall smurfs action
 565         # Filter packets for smurfs (packets with a broadcast address as the source).
 566         "-s 0.0.0.0/32 -j RETURN",
 567         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 568         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 569     ],
 570 };
 571
 572 # iptables -p icmp -h
 573 my $icmp_type_names = {
 574     any => 1,
 575     'echo-reply' => 1,
 576     'destination-unreachable' => 1,
 577     'network-unreachable' => 1,
 578     'host-unreachable' => 1,
 579     'protocol-unreachable' => 1,
 580     'port-unreachable' => 1,
 581     'fragmentation-needed' => 1,
 582     'source-route-failed' => 1,
 583     'network-unknown' => 1,
 584     'host-unknown' => 1,
 585     'network-prohibited' => 1,
 586     'host-prohibited' => 1,
 587     'TOS-network-unreachable' => 1,
 588     'TOS-host-unreachable' => 1,
 589     'communication-prohibited' => 1,
 590     'host-precedence-violation' => 1,
 591     'precedence-cutoff' => 1,
 592     'source-quench' => 1,
 593     'redirect' => 1,
 594     'network-redirect' => 1,
 595     'host-redirect' => 1,
 596     'TOS-network-redirect' => 1,
 597     'TOS-host-redirect' => 1,
 598     'echo-request' => 1,
 599     'router-advertisement' => 1,
 600     'router-solicitation' => 1,
 601     'time-exceeded' => 1,
 602     'ttl-zero-during-transit' => 1,
 603     'ttl-zero-during-reassembly' => 1,
 604     'parameter-problem' => 1,
 605     'ip-header-bad' => 1,
 606     'required-option-missing' => 1,
 607     'timestamp-request' => 1,
 608     'timestamp-reply' => 1,
 609     'address-mask-request' => 1,
 610     'address-mask-reply' => 1,
 611 };
 612
 613 sub init_firewall_macros {
 614
 615     $pve_fw_parsed_macros = {};
 616
 617     foreach my $k (keys %$pve_fw_macros) {
 618         my $lc_name = lc($k);
 619         my $macro = $pve_fw_macros->{$k};
 620         if (!ref($macro->[0])) {
 621             $pve_fw_macro_descr->{$k} = shift @$macro;
 622         }
 623         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 624         $pve_fw_parsed_macros->{$k} = $macro;
 625     }
 626 }
 627
 628 init_firewall_macros();
 629
 630 sub get_macros {
 631     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 632 }
 633
 634 my $etc_services;
 635
 636 sub get_etc_services {
 637
 638     return $etc_services if $etc_services;
 639
 640     my $filename = "/etc/services";
 641
 642     my $fh = IO::File->new($filename, O_RDONLY);
 643     if (!$fh) {
 644         warn "unable to read '$filename' - $!\n";
 645         return {};
 646     }
 647
 648     my $services = {};
 649
 650     while (my $line = <$fh>) {
 651         chomp ($line);
 652         next if $line =~m/^#/;
 653         next if ($line =~m/^\s*$/);
 654
 655         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 656             $services->{byid}->{$2}->{name} = $1;
 657             $services->{byid}->{$2}->{port} = $2;
 658             $services->{byid}->{$2}->{$3} = 1;
 659             $services->{byname}->{$1} = $services->{byid}->{$2};
 660         }
 661     }
 662
 663     close($fh);
 664
 665     $etc_services = $services;
 666
 667
 668     return $etc_services;
 669 }
 670
 671 my $etc_protocols;
 672
 673 sub get_etc_protocols {
 674     return $etc_protocols if $etc_protocols;
 675
 676     my $filename = "/etc/protocols";
 677
 678     my $fh = IO::File->new($filename, O_RDONLY);
 679     if (!$fh) {
 680         warn "unable to read '$filename' - $!\n";
 681         return {};
 682     }
 683
 684     my $protocols = {};
 685
 686     while (my $line = <$fh>) {
 687         chomp ($line);
 688         next if $line =~m/^#/;
 689         next if ($line =~m/^\s*$/);
 690
 691         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 692             $protocols->{byid}->{$2}->{name} = $1;
 693             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 694         }
 695     }
 696
 697     close($fh);
 698
 699     $etc_protocols = $protocols;
 700
 701     return $etc_protocols;
 702 }
 703
 704 sub parse_address_list {
 705     my ($str) = @_;
 706
 707     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 708
 709     my $count = 0;
 710     my $iprange = 0;
 711     foreach my $elem (split(/,/, $str)) {
 712         $count++;
 713         if (!Net::IP->new($elem)) {
 714             my $err = Net::IP::Error();
 715             die "invalid IP address: $err\n";
 716         }
 717         $iprange = 1 if $elem =~ m/-/;
 718     }
 719
 720     die "you can use a range in a list\n" if $iprange && $count > 1;
 721 }
 722
 723 sub parse_port_name_number_or_range {
 724     my ($str) = @_;
 725
 726     my $services = PVE::Firewall::get_etc_services();
 727     my $count = 0;
 728     my $icmp_port = 0;
 729
 730     foreach my $item (split(/,/, $str)) {
 731         $count++;
 732         if ($item =~ m/^(\d+):(\d+)$/) {
 733             my ($port1, $port2) = ($1, $2);
 734             die "invalid port '$port1'\n" if $port1 > 65535;
 735             die "invalid port '$port2'\n" if $port2 > 65535;
 736         } elsif ($item =~ m/^(\d+)$/) {
 737             my $port = $1;
 738             die "invalid port '$port'\n" if $port > 65535;
 739         } else {
 740             if ($icmp_type_names->{$item}) {
 741                 $icmp_port = 1;
 742             } else {
 743                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 744             }
 745         }
 746     }
 747
 748     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 749
 750     return $count;
 751 }
 752
 753 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 754 sub pve_fw_verify_port_spec {
 755    my ($portstr) = @_;
 756
 757    parse_port_name_number_or_range($portstr);
 758
 759    return $portstr;
 760 }
 761
 762 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 763 sub pve_fw_verify_v4addr_spec {
 764    my ($list) = @_;
 765
 766    parse_address_list($list);
 767
 768    return $list;
 769 }
 770
 771 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 772 sub pve_fw_verify_protocol_spec {
 773    my ($proto) = @_;
 774
 775    my $protocols = get_etc_protocols();
 776
 777    die "unknown protocol '$proto'\n" if $proto &&
 778        !(defined($protocols->{byname}->{$proto}) ||
 779          defined($protocols->{byid}->{$proto}));
 780
 781    return $proto;
 782 }
 783
 784
 785 # helper function for API
 786
 787 sub copy_opject_with_digest {
 788     my ($object) = @_;
 789
 790     my $sha = Digest::SHA->new('sha1');
 791
 792     my $res = {};
 793     foreach my $k (sort keys %$object) {
 794         my $v = $object->{$k};
 795         next if !defined($v);
 796         $res->{$k} = $v;
 797         $sha->add($k, ':', $v, "\n");
 798     }
 799
 800     my $digest = $sha->b64digest;
 801
 802     $res->{digest} = $digest;
 803
 804     return wantarray ? ($res, $digest) : $res;
 805 }
 806
 807 sub copy_list_with_digest {
 808     my ($list) = @_;
 809
 810     my $sha = Digest::SHA->new('sha1');
 811
 812     my $res = [];
 813     foreach my $entry (@$list) {
 814         my $data = {};
 815         foreach my $k (sort keys %$entry) {
 816             my $v = $entry->{$k};
 817             next if !defined($v);
 818             $data->{$k} = $v;
 819             $sha->add($k, ':', $v, "\n");
 820         }
 821         push @$res, $data;
 822     }
 823
 824     my $digest = $sha->b64digest;
 825
 826     foreach my $entry (@$res) {
 827         $entry->{digest} = $digest;
 828     }
 829
 830     return wantarray ? ($res, $digest) : $res;
 831 }
 832
 833 my $rule_properties = {
 834     pos => {
 835         description => "Update rule at position <pos>.",
 836         type => 'integer',
 837         minimum => 0,
 838         optional => 1,
 839     },
 840     digest => get_standard_option('pve-config-digest'),
 841     type => {
 842         type => 'string',
 843         optional => 1,
 844         enum => ['in', 'out', 'group'],
 845     },
 846     action => {
 847         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 848         type => 'string',
 849         optional => 1,
 850         pattern => $security_group_pattern,
 851         maxLength => 20,
 852         minLength => 2,
 853     },
 854     macro => {
 855         type => 'string',
 856         optional => 1,
 857         maxLength => 128,
 858     },
 859     iface => get_standard_option('pve-iface', { optional => 1 }),
 860     source => {
 861         type => 'string', format => 'pve-fw-v4addr-spec',
 862         optional => 1,
 863     },
 864     dest => {
 865         type => 'string', format => 'pve-fw-v4addr-spec',
 866         optional => 1,
 867     },
 868     proto => {
 869         type => 'string', format => 'pve-fw-protocol-spec',
 870         optional => 1,
 871     },
 872     enable => {
 873         type => 'boolean',
 874         optional => 1,
 875     },
 876     sport => {
 877         type => 'string', format => 'pve-fw-port-spec',
 878         optional => 1,
 879     },
 880     dport => {
 881         type => 'string', format => 'pve-fw-port-spec',
 882         optional => 1,
 883     },
 884     comment => {
 885         type => 'string',
 886         optional => 1,
 887     },
 888 };
 889
 890 sub add_rule_properties {
 891     my ($properties) = @_;
 892
 893     foreach my $k (keys %$rule_properties) {
 894         my $h = $rule_properties->{$k};
 895         # copy data, so that we can modify later without side effects
 896         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 897     }
 898
 899     return $properties;
 900 }
 901
 902 sub delete_rule_properties {
 903     my ($rule, $delete_str) = @_;
 904
 905     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 906         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 907             if !defined($rule_properties->{$opt});
 908         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 909             if $opt eq 'type' || $opt eq 'action';
 910         delete $rule->{$opt};
 911     }
 912
 913     return $rule;
 914 }
 915
 916 my $apply_macro = sub {
 917     my ($macro_name, $param, $verify) = @_;
 918
 919     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 920     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 921
 922     my $rules = [];
 923
 924     foreach my $templ (@$macro_rules) {
 925         my $rule = {};
 926         my $param_used = {};
 927         foreach my $k (keys %$templ) {
 928             my $v = $templ->{$k};
 929             if ($v eq 'PARAM') {
 930                 $v = $param->{$k};
 931                 $param_used->{$k} = 1;
 932             } elsif ($v eq 'DEST') {
 933                 $v = $param->{dest};
 934                 $param_used->{dest} = 1;
 935             } elsif ($v eq 'SOURCE') {
 936                 $v = $param->{source};
 937                 $param_used->{source} = 1;
 938             }
 939
 940             if (!defined($v)) {
 941                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 942                 raise_param_exc({ macro => $msg }) if $verify;
 943                 die "$msg\n";
 944             }
 945             $rule->{$k} = $v;
 946         }
 947         foreach my $k (keys %$param) {
 948             next if $k eq 'macro';
 949             next if !defined($param->{$k});
 950             next if $param_used->{$k};
 951             if (defined($rule->{$k})) {
 952                 if ($rule->{$k} ne $param->{$k}) {
 953                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 954                     raise_param_exc({ $k => $msg }) if $verify;
 955                     die "$msg\n";
 956                 }
 957             } else {
 958                 $rule->{$k} = $param->{$k};
 959             }
 960         }
 961         push @$rules, $rule;
 962     }
 963
 964     return $rules;
 965 };
 966
 967 sub verify_rule {
 968     my ($rule, $allow_groups) = @_;
 969
 970     my $type = $rule->{type};
 971
 972     raise_param_exc({ type => "missing property"}) if !$type;
 973     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 974
 975     if ($type eq  'in' || $type eq 'out') {
 976         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 977             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 978     } elsif ($type eq 'group') {
 979         raise_param_exc({ type => "security groups not allowed"})
 980             if !$allow_groups;
 981         raise_param_exc({ action => "invalid characters in security group name"})
 982             if $rule->{action} !~ m/^${security_group_pattern}$/;
 983     } else {
 984         raise_param_exc({ type => "unknown rule type '$type'"});
 985     }
 986
 987     # fixme: verify $rule->{iface}?
 988
 989     if ($rule->{macro}) {
 990         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 991         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 992         $rule->{macro} = $preferred_name;
 993     }
 994
 995     if ($rule->{dport}) {
 996         eval { parse_port_name_number_or_range($rule->{dport}); };
 997         raise_param_exc({ dport => $@ }) if $@;
 998     }
 999
1000     if ($rule->{sport}) {
1001         eval { parse_port_name_number_or_range($rule->{sport}); };
1002         raise_param_exc({ sport => $@ }) if $@;
1003     }
1004
1005     if ($rule->{source}) {
1006         eval { parse_address_list($rule->{source}); };
1007         raise_param_exc({ source => $@ }) if $@;
1008     }
1009
1010     if ($rule->{dest}) {
1011         eval { parse_address_list($rule->{dest}); };
1012         raise_param_exc({ dest => $@ }) if $@;
1013     }
1014
1015     if ($rule->{macro}) {
1016         &$apply_macro($rule->{macro}, $rule, 1);
1017     }
1018
1019     return $rule;
1020 }
1021
1022 sub copy_rule_data {
1023     my ($rule, $param) = @_;
1024
1025     foreach my $k (keys %$rule_properties) {
1026         if (defined(my $v = $param->{$k})) {
1027             if ($v eq '' || $v eq '-') {
1028                 delete $rule->{$k};
1029             } else {
1030                 $rule->{$k} = $v;
1031             }
1032         } else {
1033             delete $rule->{$k};
1034         }
1035     }
1036
1037     # verify rule now
1038
1039     return $rule;
1040 }
1041
1042 # core functions
1043 my $bridge_firewall_enabled = 0;
1044
1045 sub enable_bridge_firewall {
1046
1047     return if $bridge_firewall_enabled; # only once
1048
1049     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1050     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1051
1052     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1053     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1054
1055     $bridge_firewall_enabled = 1;
1056 }
1057
1058 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1059
1060 sub iptables_restore_cmdlist {
1061     my ($cmdlist) = @_;
1062
1063     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1064 }
1065
1066 sub ipset_restore_cmdlist {
1067     my ($cmdlist) = @_;
1068
1069     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1070 }
1071
1072 sub iptables_get_chains {
1073
1074     my $res = {};
1075
1076     # check what chains we want to track
1077     my $is_pvefw_chain = sub {
1078         my $name = shift;
1079
1080         return 1 if $name =~ m/^PVEFW-\S+$/;
1081
1082         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1083
1084         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1085
1086         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1087
1088         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1089         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1090
1091         return undef;
1092     };
1093
1094     my $table = '';
1095
1096     my $hooks = {};
1097
1098     my $parser = sub {
1099         my $line = shift;
1100
1101         return if $line =~ m/^#/;
1102         return if $line =~ m/^\s*$/;
1103
1104         if ($line =~ m/^\*(\S+)$/) {
1105             $table = $1;
1106             return;
1107         }
1108
1109         return if $table ne 'filter';
1110
1111         if ($line =~ m/^:(\S+)\s/) {
1112             my $chain = $1;
1113             return if !&$is_pvefw_chain($chain);
1114             $res->{$chain} = "unknown";
1115         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1116             my ($chain, $sig) = ($1, $2);
1117             return if !&$is_pvefw_chain($chain);
1118             $res->{$chain} = $sig;
1119         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1120             $hooks->{$1} = 1;
1121         } else {
1122             # simply ignore the rest
1123             return;
1124         }
1125     };
1126
1127     run_command("/sbin/iptables-save", outfunc => $parser);
1128
1129     return wantarray ? ($res, $hooks) : $res;
1130 }
1131
1132 sub iptables_chain_digest {
1133     my ($rules) = @_;
1134     my $digest = Digest::SHA->new('sha1');
1135     foreach my $rule (@$rules) { # order is important
1136         $digest->add($rule);
1137     }
1138     return $digest->b64digest;
1139 }
1140
1141 sub ipset_chain_digest {
1142     my ($rules) = @_;
1143
1144     my $digest = Digest::SHA->new('sha1');
1145     foreach my $rule (sort @$rules) { # note: sorted
1146         $digest->add($rule);
1147     }
1148     return $digest->b64digest;
1149 }
1150
1151 sub ipset_get_chains {
1152
1153     my $res = {};
1154     my $chains = {};
1155
1156     my $parser = sub {
1157         my $line = shift;
1158
1159         return if $line =~ m/^#/;
1160         return if $line =~ m/^\s*$/;
1161         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1162             my $chain = $1;
1163             $line =~ s/\s+$//; # delete trailing white space
1164             push @{$chains->{$chain}}, $line;
1165         } else {
1166             # simply ignore the rest
1167             return;
1168         }
1169     };
1170
1171     run_command("/usr/sbin/ipset save", outfunc => $parser);
1172
1173     # compute digest for each chain
1174     foreach my $chain (keys %$chains) {
1175         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1176     }
1177
1178     return $res;
1179 }
1180
1181 sub ruleset_generate_cmdstr {
1182     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1183
1184     return if defined($rule->{enable}) && !$rule->{enable};
1185
1186     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1187
1188     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1189     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1190
1191     my @cmd = ();
1192
1193     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1194     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1195
1196     my $source = $rule->{source};
1197     my $dest = $rule->{dest};
1198
1199     if ($source) {
1200         if ($source =~ m/^(\+)(\S+)$/) {
1201             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1202             push @cmd, "-m set --match-set PVEFW-$2 src";
1203
1204         } elsif ($source =~ m/\-/){
1205             push @cmd, "-m iprange --src-range $source";
1206
1207         } else {
1208             push @cmd, "-s $source";
1209         }
1210     }
1211
1212     if ($dest) {
1213         if ($dest =~ m/^(\+)(\S+)$/) {
1214             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1215             push @cmd, "-m set --match-set PVEFW-$2 dst";
1216
1217         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1218             push @cmd, "-m iprange --dst-range $dest";
1219
1220         } else {
1221             push @cmd, "-s $dest";
1222         }
1223     }
1224
1225     if ($rule->{proto}) {
1226         push @cmd, "-p $rule->{proto}";
1227
1228         my $multiport = 0;
1229         $multiport++ if $nbdport > 1;
1230         $multiport++ if $nbsport > 1;
1231
1232         push @cmd, "--match multiport" if $multiport;
1233
1234         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1235             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1236
1237         if ($rule->{dport}) {
1238             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1239                 # Note: we use dport to store --icmp-type
1240                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1241                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1242             } else {
1243                 if ($nbdport > 1) {
1244                     if ($multiport == 2) {
1245                         push @cmd,  "--ports $rule->{dport}";
1246                     } else {
1247                         push @cmd, "--dports $rule->{dport}";
1248                     }
1249                 } else {
1250                     push @cmd, "--dport $rule->{dport}";
1251                 }
1252             }
1253         }
1254
1255         if ($rule->{sport}) {
1256             if ($nbsport > 1) {
1257                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1258             } else {
1259                 push @cmd, "--sport $rule->{sport}";
1260             }
1261         }
1262     } elsif ($rule->{dport} || $rule->{sport}) {
1263         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1264         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1265     }
1266
1267     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1268
1269     if (my $action = $rule->{action}) {
1270         $action = $actions->{$action} if defined($actions->{$action});
1271         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1272         push @cmd, $goto ? "-g $action" : "-j $action";
1273     }
1274
1275     return scalar(@cmd) ? join(' ', @cmd) : undef;
1276 }
1277
1278 sub ruleset_generate_rule {
1279     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1280
1281     my $rules;
1282
1283     if ($rule->{macro}) {
1284         $rules = &$apply_macro($rule->{macro}, $rule);
1285     } else {
1286         $rules = [ $rule ];
1287     }
1288
1289     foreach my $tmp (@$rules) {
1290         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1291             ruleset_addrule($ruleset, $chain, $cmdstr);
1292         }
1293     }
1294 }
1295
1296 sub ruleset_generate_rule_insert {
1297     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1298
1299     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1300
1301     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1302         ruleset_insertrule($ruleset, $chain, $cmdstr);
1303     }
1304 }
1305
1306 sub ruleset_create_chain {
1307     my ($ruleset, $chain) = @_;
1308
1309     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1310     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1311
1312     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1313
1314     $ruleset->{$chain} = [];
1315 }
1316
1317 sub ruleset_chain_exist {
1318     my ($ruleset, $chain) = @_;
1319
1320     return $ruleset->{$chain} ? 1 : undef;
1321 }
1322
1323 sub ruleset_addrule {
1324    my ($ruleset, $chain, $rule) = @_;
1325
1326    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1327
1328    push @{$ruleset->{$chain}}, "-A $chain $rule";
1329 }
1330
1331 sub ruleset_insertrule {
1332    my ($ruleset, $chain, $rule) = @_;
1333
1334    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1335
1336    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1337 }
1338
1339 sub get_log_rule_base {
1340     my ($chain, $vmid, $msg, $loglevel) = @_;
1341
1342     die "internal error - no log level" if !defined($loglevel);
1343
1344     $vmid = 0 if !defined($vmid);
1345
1346     # Note: we use special format for prefix to pass further
1347     # info to log daemon (VMID, LOGVELEL and CHAIN)
1348
1349     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1350 }
1351
1352 sub ruleset_addlog {
1353     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1354
1355     return if !defined($loglevel);
1356
1357     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1358
1359     $logrule = "$rule $logrule" if defined($rule);
1360
1361     ruleset_addrule($ruleset, $chain, $logrule)
1362 }
1363
1364 sub generate_bridge_chains {
1365     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1366
1367     my $options = $hostfw_conf->{options} || {};
1368
1369     die "error: detected direct route to bridge '$bridge'\n"
1370         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1371
1372     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1373         ruleset_create_chain($ruleset, "$bridge-FW");
1374         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1375         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1376     }
1377
1378     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1379         ruleset_create_chain($ruleset, "$bridge-OUT");
1380         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1381         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1382     }
1383
1384     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1385         ruleset_create_chain($ruleset, "$bridge-IN");
1386         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1387         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1388         # accept traffic to unmanaged bridge ports
1389         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1390     }
1391 }
1392
1393 sub ruleset_add_chain_policy {
1394     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1395
1396     if ($policy eq 'ACCEPT') {
1397
1398         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1399                               { ACCEPT =>  $accept_action});
1400
1401     } elsif ($policy eq 'DROP') {
1402
1403         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1404
1405         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1406
1407         ruleset_addrule($ruleset, $chain, "-j DROP");
1408     } elsif ($policy eq 'REJECT') {
1409         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1410
1411         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1412
1413         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1414     } else {
1415         # should not happen
1416         die "internal error: unknown policy '$policy'";
1417     }
1418 }
1419
1420 sub ruleset_create_vm_chain {
1421     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1422
1423     ruleset_create_chain($ruleset, $chain);
1424     my $accept = generate_nfqueue($options);
1425
1426     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1427         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1428     }
1429
1430     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1431         if ($direction eq 'OUT') {
1432             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1433                                                       proto => 'udp', sport => 68, dport => 67 });
1434         } else {
1435             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1436                                                       proto => 'udp', sport => 67, dport => 68 });
1437         }
1438     }
1439
1440     if ($options->{tcpflags}) {
1441         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1442     }
1443
1444     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1445     if ($direction eq 'OUT') {
1446         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1447     } else {
1448         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1449     }
1450
1451     if ($direction eq 'OUT') {
1452         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1453             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1454         }
1455         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1456     }
1457 }
1458
1459 sub ruleset_generate_vm_rules {
1460     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1461
1462     my $lc_direction = lc($direction);
1463
1464     foreach my $rule (@$rules) {
1465         next if $rule->{iface} && $rule->{iface} ne $netid;
1466         next if !$rule->{enable};
1467         if ($rule->{type} eq 'group') {
1468             my $group_chain = "GROUP-$rule->{action}-$direction";
1469             if(!ruleset_chain_exist($ruleset, $group_chain)){
1470                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1471             }
1472             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1473             if ($direction eq 'OUT'){
1474                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1475             }else{
1476                 my $accept = generate_nfqueue($options);
1477                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1478             }
1479
1480         } else {
1481             next if $rule->{type} ne $lc_direction;
1482             if ($direction eq 'OUT') {
1483                 ruleset_generate_rule($ruleset, $chain, $rule,
1484                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1485             } else {
1486                 my $accept = generate_nfqueue($options);
1487                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1488             }
1489         }
1490     }
1491 }
1492
1493 sub generate_nfqueue {
1494     my ($options) = @_;
1495
1496     my $action = "";
1497     if($options->{ips}){
1498         $action = "NFQUEUE";
1499         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1500             if(defined($3) && defined($1)) {
1501                 $action .= " --queue-balance $1:$3";
1502             }elsif (defined($1)) {
1503                 $action .= " --queue-num $1";
1504             }
1505         }
1506         $action .= " --queue-bypass";
1507     }else{
1508         $action = "ACCEPT";
1509     }
1510
1511     return $action;
1512 }
1513
1514 sub ruleset_generate_vm_ipsrules {
1515     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1516
1517     if ($options->{ips} && $direction eq 'IN') {
1518         my $nfqueue = generate_nfqueue($options);
1519
1520         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1521             ruleset_create_chain($ruleset, "PVEFW-IPS");
1522         }
1523
1524         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1525             ruleset_create_chain($ruleset, "$bridge-IPS");
1526             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1527         }
1528
1529         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1530     }
1531 }
1532
1533 sub generate_venet_rules_direction {
1534     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1535
1536     parse_address_list($ip); # make sure we have a valid $ip list
1537
1538     my $lc_direction = lc($direction);
1539
1540     my $rules = $vmfw_conf->{rules};
1541
1542     my $options = $vmfw_conf->{options};
1543     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1544
1545     my $chain = "venet0-$vmid-$direction";
1546
1547     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1548
1549     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1550
1551     # implement policy
1552     my $policy;
1553
1554     if ($direction eq 'OUT') {
1555         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1556     } else {
1557         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1558     }
1559
1560     my $accept = generate_nfqueue($options);
1561     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1562     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1563
1564     # plug into FORWARD, INPUT and OUTPUT chain
1565     if ($direction eq 'OUT') {
1566         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1567             action => $chain,
1568             source => $ip,
1569             iface_in => 'venet0'});
1570
1571         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1572             action => $chain,
1573             source => $ip,
1574             iface_in => 'venet0'});
1575     } else {
1576         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1577             action => $chain,
1578             dest => $ip,
1579             iface_out => 'venet0'});
1580
1581         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1582             action => $chain,
1583             dest => $ip,
1584             iface_out => 'venet0'});
1585     }
1586 }
1587
1588 sub generate_tap_rules_direction {
1589     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1590
1591     my $lc_direction = lc($direction);
1592
1593     my $rules = $vmfw_conf->{rules};
1594
1595     my $options = $vmfw_conf->{options};
1596     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1597
1598     my $tapchain = "$iface-$direction";
1599
1600     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1601
1602     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1603
1604     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1605
1606     # implement policy
1607     my $policy;
1608
1609     if ($direction eq 'OUT') {
1610         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1611     } else {
1612         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1613     }
1614
1615     my $accept = generate_nfqueue($options);
1616     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1617     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1618
1619     # plug the tap chain to bridge chain
1620     if ($direction eq 'IN') {
1621         ruleset_insertrule($ruleset, "$bridge-IN",
1622                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1623     } else {
1624         ruleset_insertrule($ruleset, "$bridge-OUT",
1625                            "-m physdev --physdev-in $iface -j $tapchain");
1626     }
1627 }
1628
1629 sub enable_host_firewall {
1630     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1631
1632     # fixme: allow security groups
1633
1634     my $options = $hostfw_conf->{options};
1635     my $rules = $hostfw_conf->{rules};
1636
1637     # host inbound firewall
1638     my $chain = "PVEFW-HOST-IN";
1639     ruleset_create_chain($ruleset, $chain);
1640
1641     my $loglevel = get_option_log_level($options, "log_level_in");
1642
1643     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1644         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1645     }
1646
1647     if ($options->{tcpflags}) {
1648         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1649     }
1650
1651     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1652     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1653     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1654     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1655     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1656     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1657
1658     # we use RETURN because we need to check also tap rules
1659     my $accept_action = 'RETURN';
1660
1661     foreach my $rule (@$rules) {
1662         next if $rule->{type} ne 'in';
1663         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1664     }
1665
1666     # implement input policy
1667     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1668     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1669
1670     # host outbound firewall
1671     $chain = "PVEFW-HOST-OUT";
1672     ruleset_create_chain($ruleset, $chain);
1673
1674     $loglevel = get_option_log_level($options, "log_level_out");
1675
1676     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1677     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1678     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1679     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1680     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1681     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1682
1683     # we use RETURN because we may want to check other thigs later
1684     $accept_action = 'RETURN';
1685
1686     foreach my $rule (@$rules) {
1687         next if $rule->{type} ne 'out';
1688         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1689     }
1690
1691     # implement output policy
1692     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1693     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1694
1695     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1696     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1697 }
1698
1699 sub generate_group_rules {
1700     my ($ruleset, $cluster_conf, $group) = @_;
1701     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1702
1703     my $rules = $cluster_conf->{groups}->{$group};
1704
1705     my $chain = "GROUP-${group}-IN";
1706
1707     ruleset_create_chain($ruleset, $chain);
1708     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1709
1710     foreach my $rule (@$rules) {
1711         next if $rule->{type} ne 'in';
1712         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1713     }
1714
1715     $chain = "GROUP-${group}-OUT";
1716
1717     ruleset_create_chain($ruleset, $chain);
1718     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1719
1720     foreach my $rule (@$rules) {
1721         next if $rule->{type} ne 'out';
1722         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1723         # check also other tap rules later
1724         ruleset_generate_rule($ruleset, $chain, $rule,
1725                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1726     }
1727 }
1728
1729 my $MAX_NETS = 32;
1730 my $valid_netdev_names = {};
1731 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1732     $valid_netdev_names->{"net$i"} = 1;
1733 }
1734
1735 sub parse_fw_rule {
1736     my ($line, $need_iface, $allow_groups) = @_;
1737
1738     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1739
1740     # we can add single line comments to the end of the rule
1741     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1742
1743     # we can disable a rule when prefixed with '|'
1744     my $enable = 1;
1745
1746     $enable = 0 if $line =~ s/^\|//;
1747
1748     my @data = split(/\s+/, $line);
1749     my $expected_elements = $need_iface ? 8 : 7;
1750
1751     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1752
1753     if ($need_iface) {
1754         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1755     } else {
1756         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1757     }
1758
1759     die "incomplete rule\n" if ! ($type && $action);
1760
1761     my $macro;
1762
1763     $type = lc($type);
1764
1765     if ($type eq  'in' || $type eq 'out') {
1766         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1767             # OK
1768         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1769             $action = $2;
1770             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1771             die "unknown macro '$1'\n" if !$preferred_name;
1772             $macro = $preferred_name;
1773         } else {
1774             die "unknown action '$action'\n";
1775         }
1776     } elsif ($type eq 'group') {
1777         die "wrong number of rule elements\n" if scalar(@data) != 3;
1778         die "groups disabled\n" if !$allow_groups;
1779
1780         die "invalid characters in group name\n" if $action !~ m/^${security_group_pattern}$/;
1781     } else {
1782         die "unknown rule type '$type'\n";
1783     }
1784
1785     if ($need_iface) {
1786         $iface = undef if $iface && $iface eq '-';
1787     }
1788
1789     $proto = undef if $proto && $proto eq '-';
1790     pve_fw_verify_protocol_spec($proto) if $proto;
1791
1792     $source = undef if $source && $source eq '-';
1793     $dest = undef if $dest && $dest eq '-';
1794
1795     $dport = undef if $dport && $dport eq '-';
1796     $sport = undef if $sport && $sport eq '-';
1797
1798     parse_port_name_number_or_range($dport) if defined($dport);
1799     parse_port_name_number_or_range($sport) if defined($sport);
1800
1801     parse_address_list($source) if $source;
1802     parse_address_list($dest) if $dest;
1803
1804     return {
1805         type => $type,
1806         enable => $enable,
1807         comment => $comment,
1808         action => $action,
1809         macro => $macro,
1810         iface => $iface,
1811         source => $source,
1812         dest => $dest,
1813         proto => $proto,
1814         dport => $dport,
1815         sport => $sport,
1816     };
1817 }
1818
1819 sub parse_vmfw_option {
1820     my ($line) = @_;
1821
1822     my ($opt, $value);
1823
1824     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1825
1826     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1827         $opt = lc($1);
1828         $value = int($2);
1829     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1830         $opt = lc($1);
1831         $value = $2 ? lc($3) : '';
1832     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1833         $opt = lc($1);
1834         $value = uc($3);
1835     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1836         $opt = lc($1);
1837         $value = $2;
1838     } else {
1839         chomp $line;
1840         die "can't parse option '$line'\n"
1841     }
1842
1843     return ($opt, $value);
1844 }
1845
1846 sub parse_hostfw_option {
1847     my ($line) = @_;
1848
1849     my ($opt, $value);
1850
1851     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1852
1853     if ($line =~ m/^(enable|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1854         $opt = lc($1);
1855         $value = int($2);
1856     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1857         $opt = lc($1);
1858         $value = $2 ? lc($3) : '';
1859     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1860         $opt = lc($1);
1861         $value = uc($3);
1862     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1863         $opt = lc($1);
1864         $value = int($2);
1865     } else {
1866         chomp $line;
1867         die "can't parse option '$line'\n"
1868     }
1869
1870     return ($opt, $value);
1871 }
1872
1873 sub parse_clusterfw_option {
1874     my ($line) = @_;
1875
1876     my ($opt, $value);
1877
1878     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1879         $opt = lc($1);
1880         $value = int($2);
1881     } else {
1882         chomp $line;
1883         die "can't parse option '$line'\n"
1884     }
1885
1886     return ($opt, $value);
1887 }
1888
1889 sub parse_vm_fw_rules {
1890     my ($filename, $fh) = @_;
1891
1892     my $res = { rules => [], options => {}};
1893
1894     my $section;
1895
1896     while (defined(my $line = <$fh>)) {
1897         next if $line =~ m/^#/;
1898         next if $line =~ m/^\s*$/;
1899
1900         my $linenr = $fh->input_line_number();
1901         my $prefix = "$filename (line $linenr)";
1902
1903         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1904             $section = lc($1);
1905             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1906             next;
1907         }
1908         if (!$section) {
1909             warn "$prefix: skip line - no section";
1910             next;
1911         }
1912
1913         next if !$res->{$section}; # skip undefined section
1914
1915         if ($section eq 'options') {
1916             eval {
1917                 my ($opt, $value) = parse_vmfw_option($line);
1918                 $res->{options}->{$opt} = $value;
1919             };
1920             warn "$prefix: $@" if $@;
1921             next;
1922         }
1923
1924         my $rule;
1925         eval { $rule = parse_fw_rule($line, 1, 1); };
1926         if (my $err = $@) {
1927             warn "$prefix: $err";
1928             next;
1929         }
1930
1931         push @{$res->{$section}}, $rule;
1932     }
1933
1934     return $res;
1935 }
1936
1937 sub parse_host_fw_rules {
1938     my ($filename, $fh) = @_;
1939
1940     my $res = { rules => [], options => {}};
1941
1942     my $section;
1943
1944     while (defined(my $line = <$fh>)) {
1945         next if $line =~ m/^#/;
1946         next if $line =~ m/^\s*$/;
1947
1948         my $linenr = $fh->input_line_number();
1949         my $prefix = "$filename (line $linenr)";
1950
1951         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1952             $section = lc($1);
1953             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1954             next;
1955         }
1956         if (!$section) {
1957             warn "$prefix: skip line - no section";
1958             next;
1959         }
1960
1961         next if !$res->{$section}; # skip undefined section
1962
1963         if ($section eq 'options') {
1964             eval {
1965                 my ($opt, $value) = parse_hostfw_option($line);
1966                 $res->{options}->{$opt} = $value;
1967             };
1968             warn "$prefix: $@" if $@;
1969             next;
1970         }
1971
1972         my $rule;
1973         eval { $rule = parse_fw_rule($line, 1, 1); };
1974         if (my $err = $@) {
1975             warn "$prefix: $err";
1976             next;
1977         }
1978
1979         push @{$res->{$section}}, $rule;
1980     }
1981
1982     return $res;
1983 }
1984
1985 sub parse_cluster_fw_rules {
1986     my ($filename, $fh) = @_;
1987
1988     my $section;
1989     my $group;
1990
1991     my $res = {
1992         rules => [],
1993         options => {},
1994         groups => {},
1995         group_comments => {},
1996         ipset => {} ,
1997         ipset_comments => {},
1998     };
1999
2000     while (defined(my $line = <$fh>)) {
2001         next if $line =~ m/^#/;
2002         next if $line =~ m/^\s*$/;
2003
2004         my $linenr = $fh->input_line_number();
2005         my $prefix = "$filename (line $linenr)";
2006
2007         if ($line =~ m/^\[options\]$/i) {
2008             $section = 'options';
2009             next;
2010         }
2011
2012         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2013             $section = 'groups';
2014             $group = lc($1);
2015             my $comment = $2;
2016             $res->{$section}->{$group} = [];
2017             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2018                 if $comment;
2019             next;
2020         }
2021
2022         if ($line =~ m/^\[rules\]$/i) {
2023             $section = 'rules';
2024             next;
2025         }
2026
2027         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2028             $section = 'ipset';
2029             $group = lc($1);
2030             my $comment = $2;
2031             $res->{$section}->{$group} = [];
2032             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2033                 if $comment;
2034             next;
2035         }
2036
2037         if (!$section) {
2038             warn "$prefix: skip line - no section\n";
2039             next;
2040         }
2041
2042         if ($section eq 'options') {
2043             eval {
2044                 my ($opt, $value) = parse_clusterfw_option($line);
2045                 $res->{options}->{$opt} = $value;
2046             };
2047             warn "$prefix: $@" if $@;
2048         } elsif ($section eq 'rules') {
2049             my $rule;
2050             eval { $rule = parse_fw_rule($line, 1, 1); };
2051             if (my $err = $@) {
2052                 warn "$prefix: $err";
2053                 next;
2054             }
2055             push @{$res->{$section}}, $rule;
2056         } elsif ($section eq 'groups') {
2057             my $rule;
2058             eval { $rule = parse_fw_rule($line, 0, 0); };
2059             if (my $err = $@) {
2060                 warn "$prefix: $err";
2061                 next;
2062             }
2063             push @{$res->{$section}->{$group}}, $rule;
2064         } elsif ($section eq 'ipset') {
2065             # we can add single line comments to the end of the rule
2066             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2067
2068             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2069             my $nomatch = $1;
2070             my $cidr = $2;
2071
2072             $cidr =~ s|/32$||;
2073
2074             eval { pve_verify_ipv4_or_cidr($cidr); };
2075             if (my $err = $@) {
2076                 warn "$prefix: $cidr - $err";
2077                 next;
2078             }
2079
2080             my $entry = { cidr => $cidr };
2081             $entry->{nomatch} = 1 if $nomatch;
2082             $entry->{comment} = $comment if $comment;
2083
2084             push @{$res->{$section}->{$group}}, $entry;
2085         }
2086     }
2087
2088     return $res;
2089 }
2090
2091 sub run_locked {
2092     my ($code, @param) = @_;
2093
2094     my $timeout = 10;
2095
2096     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2097
2098     die $@ if $@;
2099
2100     return $res;
2101 }
2102
2103 sub read_local_vm_config {
2104
2105     my $openvz = {};
2106     my $qemu = {};
2107
2108     my $vmdata = { openvz => $openvz, qemu => $qemu };
2109
2110     my $vmlist = PVE::Cluster::get_vmlist();
2111     return $vmdata if !$vmlist || !$vmlist->{ids};
2112     my $ids = $vmlist->{ids};
2113
2114     foreach my $vmid (keys %$ids) {
2115         next if !$vmid; # skip VE0
2116         my $d = $ids->{$vmid};
2117         next if !$d->{node} || $d->{node} ne $nodename;
2118         next if !$d->{type};
2119         if ($d->{type} eq 'openvz') {
2120             if ($have_pve_manager) {
2121                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2122                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2123                     $openvz->{$vmid} = $conf;
2124                 }
2125             }
2126         } elsif ($d->{type} eq 'qemu') {
2127             if ($have_qemu_server) {
2128                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2129                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2130                     $qemu->{$vmid} = $conf;
2131                 }
2132             }
2133         }
2134     }
2135
2136     return $vmdata;
2137 };
2138
2139 sub load_vmfw_conf {
2140     my ($vmid) = @_;
2141
2142     my $vmfw_conf = {};
2143
2144     my $filename = "/etc/pve/firewall/$vmid.fw";
2145     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2146         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2147     }
2148
2149     return $vmfw_conf;
2150 }
2151
2152 my $format_rules = sub {
2153     my ($rules, $need_iface) = @_;
2154
2155     my $raw = '';
2156
2157     foreach my $rule (@$rules) {
2158         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2159             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2160             $raw .= uc($rule->{type});
2161             if ($rule->{macro}) {
2162                 $raw .= " $rule->{macro}($rule->{action})";
2163             } else {
2164                 $raw .= " " . $rule->{action};
2165             }
2166             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2167
2168             if ($rule->{type} ne  'group')  {
2169                 $raw .= " " . ($rule->{source} || '-');
2170                 $raw .= " " . ($rule->{dest} || '-');
2171                 $raw .= " " . ($rule->{proto} || '-');
2172                 $raw .= " " . ($rule->{dport} || '-');
2173                 $raw .= " " . ($rule->{sport} || '-');
2174             }
2175
2176             $raw .= " # " . encode('utf8', $rule->{comment})
2177                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2178             $raw .= "\n";
2179         } else {
2180             die "unknown rule type '$rule->{type}'";
2181         }
2182     }
2183
2184     return $raw;
2185 };
2186
2187 my $format_options = sub {
2188     my ($options) = @_;
2189
2190     my $raw = '';
2191
2192     $raw .= "[OPTIONS]\n\n";
2193     foreach my $opt (keys %$options) {
2194         $raw .= "$opt: $options->{$opt}\n";
2195     }
2196     $raw .= "\n";
2197
2198     return $raw;
2199 };
2200
2201 my $format_ipset = sub {
2202     my ($options) = @_;
2203
2204     my $raw = '';
2205
2206     my $nethash = {};
2207     foreach my $entry (@$options) {
2208         $nethash->{$entry->{cidr}} = $entry;
2209     }
2210
2211     foreach my $cidr (sort keys %$nethash) {
2212         my $entry = $nethash->{$cidr};
2213         my $line = $entry->{nomatch} ? '!' : '';
2214         $line .= $entry->{cidr};
2215         $line .= " # " . encode('utf8', $entry->{comment})
2216             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2217         $raw .= "$line\n";
2218     }
2219
2220     return $raw;
2221 };
2222
2223 sub save_vmfw_conf {
2224     my ($vmid, $vmfw_conf) = @_;
2225
2226     my $raw = '';
2227
2228     my $options = $vmfw_conf->{options};
2229     $raw .= &$format_options($options) if scalar(keys %$options);
2230
2231     my $rules = $vmfw_conf->{rules};
2232     if (scalar(@$rules)) {
2233         $raw .= "[RULES]\n\n";
2234         $raw .= &$format_rules($rules, 1);
2235         $raw .= "\n";
2236     }
2237
2238     my $filename = "/etc/pve/firewall/$vmid.fw";
2239     PVE::Tools::file_set_contents($filename, $raw);
2240 }
2241
2242 sub read_vm_firewall_configs {
2243     my ($vmdata) = @_;
2244     my $vmfw_configs = {};
2245
2246     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2247         my $vmfw_conf = load_vmfw_conf($vmid);
2248         next if !$vmfw_conf->{options}; # skip if file does not exists
2249         $vmfw_configs->{$vmid} = $vmfw_conf;
2250     }
2251
2252     return $vmfw_configs;
2253 }
2254
2255 sub get_option_log_level {
2256     my ($options, $k) = @_;
2257
2258     my $v = $options->{$k};
2259     $v = $default_log_level if !defined($v);
2260
2261     return undef if $v eq '' || $v eq 'nolog';
2262
2263     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2264
2265     return $v if ($v >= 0) && ($v <= 7);
2266
2267     warn "unknown log level ($k = '$v')\n";
2268
2269     return undef;
2270 }
2271
2272 sub generate_std_chains {
2273     my ($ruleset, $options) = @_;
2274
2275     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2276
2277     # same as shorewall smurflog.
2278     my $chain = 'PVEFW-smurflog';
2279
2280     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2281     push @{$pve_std_chains->{$chain}}, "-j DROP";
2282
2283     # same as shorewall logflags action.
2284     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2285     $chain = 'PVEFW-logflags';
2286     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2287     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2288     push @{$pve_std_chains->{$chain}}, "-j DROP";
2289
2290     foreach my $chain (keys %$pve_std_chains) {
2291         ruleset_create_chain($ruleset, $chain);
2292         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2293             if (ref($rule)) {
2294                 ruleset_generate_rule($ruleset, $chain, $rule);
2295             } else {
2296                 ruleset_addrule($ruleset, $chain, $rule);
2297             }
2298         }
2299     }
2300 }
2301
2302 sub generate_ipset_chains {
2303     my ($ipset_ruleset, $fw_conf) = @_;
2304
2305     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2306         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2307     }
2308 }
2309
2310 sub generate_ipset {
2311     my ($ipset_ruleset, $name, $options) = @_;
2312
2313     my $hashsize = scalar(@$options);
2314     if ($hashsize <= 64) {
2315         $hashsize = 64;
2316     } else {
2317         $hashsize = round_powerof2($hashsize);
2318     }
2319
2320     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2321
2322     # remove duplicates
2323     my $nethash = {};
2324     foreach my $entry (@$options) {
2325         $nethash->{$entry->{cidr}} = $entry;
2326     }
2327
2328     foreach my $cidr (sort keys %$nethash) {
2329         my $entry = $nethash->{$cidr};
2330
2331         my $cmd = "add $name $cidr";
2332         if ($entry->{nomatch}) {
2333             if ($feature_ipset_nomatch) {
2334                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2335             } else {
2336                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2337             }
2338         } else {
2339             push @{$ipset_ruleset->{$name}}, $cmd;
2340         }
2341     }
2342 }
2343
2344 sub round_powerof2 {
2345     my ($int) = @_;
2346
2347     $int--;
2348     $int |= $int >> $_ foreach (1,2,4,8,16);
2349     return ++$int;
2350 }
2351
2352 sub save_pvefw_status {
2353     my ($status) = @_;
2354
2355     die "unknown status '$status' - internal error"
2356         if $status !~ m/^(stopped|active)$/;
2357
2358     mkdir dirname($pve_fw_status_filename);
2359     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2360 }
2361
2362 sub read_pvefw_status {
2363
2364     my $status = 'unknown';
2365
2366     return 'stopped' if ! -f $pve_fw_status_filename;
2367
2368     eval {
2369         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2370     };
2371     warn $@ if $@;
2372
2373     return $status;
2374 }
2375
2376 # fixme: move to pve-common PVE::ProcFSTools
2377 sub read_proc_net_route {
2378     my $filename = "/proc/net/route";
2379
2380     my $res = {};
2381
2382     my $fh = IO::File->new ($filename, "r");
2383     return $res if !$fh;
2384
2385     my $int_to_quad = sub {
2386         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2387     };
2388
2389     while (defined(my $line = <$fh>)) {
2390         next if $line =~/^Iface\s+Destination/; # skip head
2391         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2392         push @{$res->{$iface}}, {
2393             dest => &$int_to_quad(hex($dest)),
2394             gateway => &$int_to_quad(hex($gateway)),
2395             mask => &$int_to_quad(hex($mask)),
2396             metric => $metric,
2397             mtu => $mtu,
2398         };
2399     }
2400
2401     return $res;
2402 }
2403
2404 sub load_clusterfw_conf {
2405
2406     my $cluster_conf = {};
2407      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2408         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2409     }
2410
2411     return $cluster_conf;
2412 }
2413
2414 sub save_clusterfw_conf {
2415     my ($cluster_conf) = @_;
2416
2417     my $raw = '';
2418
2419     my $options = $cluster_conf->{options};
2420     $raw .= &$format_options($options) if scalar(keys %$options);
2421
2422     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2423         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2424             my $utf8comment = encode('utf8', $comment);
2425             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2426         } else {
2427             $raw .= "[IPSET $ipset]\n\n";
2428         }
2429         my $options = $cluster_conf->{ipset}->{$ipset};
2430         $raw .= &$format_ipset($options);
2431         $raw .= "\n";
2432     }
2433
2434     my $rules = $cluster_conf->{rules};
2435     if (scalar(@$rules)) {
2436         $raw .= "[RULES]\n\n";
2437         $raw .= &$format_rules($rules, 1);
2438         $raw .= "\n";
2439     }
2440
2441     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2442         my $rules = $cluster_conf->{groups}->{$group};
2443         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2444             my $utf8comment = encode('utf8', $comment);
2445             $raw .= "[group $group] # $utf8comment\n\n";
2446         } else {
2447             $raw .= "[group $group]\n\n";
2448         }
2449
2450         $raw .= &$format_rules($rules, 0);
2451         $raw .= "\n";
2452     }
2453
2454     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2455 }
2456
2457 sub load_hostfw_conf {
2458
2459     my $hostfw_conf = {};
2460     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2461         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2462     }
2463     return $hostfw_conf;
2464 }
2465
2466 sub save_hostfw_conf {
2467     my ($hostfw_conf) = @_;
2468
2469     my $raw = '';
2470
2471     my $options = $hostfw_conf->{options};
2472     $raw .= &$format_options($options) if scalar(keys %$options);
2473
2474     my $rules = $hostfw_conf->{rules};
2475     if (scalar(@$rules)) {
2476         $raw .= "[RULES]\n\n";
2477         $raw .= &$format_rules($rules, 1);
2478         $raw .= "\n";
2479     }
2480
2481     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2482 }
2483
2484 sub compile {
2485     my $vmdata = read_local_vm_config();
2486     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2487
2488     my $routing_table = read_proc_net_route();
2489
2490     my $cluster_conf = load_clusterfw_conf();
2491
2492     my $ipset_ruleset = {};
2493     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2494
2495     my $ruleset = {};
2496
2497     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2498     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2499
2500     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2501
2502     my $hostfw_conf = load_hostfw_conf();
2503     my $hostfw_options = $hostfw_conf->{options} || {};
2504
2505     generate_std_chains($ruleset, $hostfw_options);
2506
2507     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2508
2509     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2510
2511     # generate firewall rules for QEMU VMs
2512     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2513         my $conf = $vmdata->{qemu}->{$vmid};
2514         my $vmfw_conf = $vmfw_configs->{$vmid};
2515         next if !$vmfw_conf;
2516         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2517
2518         foreach my $netid (keys %$conf) {
2519             next if $netid !~ m/^net(\d+)$/;
2520             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2521             next if !$net;
2522             my $iface = "tap${vmid}i$1";
2523
2524             my $bridge = $net->{bridge};
2525             next if !$bridge; # fixme: ?
2526
2527             $bridge .= "v$net->{tag}" if $net->{tag};
2528
2529             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2530
2531             my $macaddr = $net->{macaddr};
2532             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2533                                          $vmfw_conf, $vmid, $bridge, 'IN');
2534             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2535                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2536         }
2537     }
2538
2539     # generate firewall rules for OpenVZ containers
2540     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2541         my $conf = $vmdata->{openvz}->{$vmid};
2542
2543         my $vmfw_conf = $vmfw_configs->{$vmid};
2544         next if !$vmfw_conf;
2545         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2546
2547         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2548             my $ip = $conf->{ip_address}->{value};
2549             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2550             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2551         }
2552
2553         if ($conf->{netif} && $conf->{netif}->{value}) {
2554             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2555             foreach my $netid (keys %$netif) {
2556                 my $d = $netif->{$netid};
2557                 my $bridge = $d->{bridge};
2558                 if (!$bridge) {
2559                     warn "no bridge device for CT $vmid iface '$netid'\n";
2560                     next; # fixme?
2561                 }
2562
2563                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2564
2565                 my $macaddr = $d->{mac};
2566                 my $iface = $d->{host_ifname};
2567                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2568                                              $vmfw_conf, $vmid, $bridge, 'IN');
2569                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2570                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2571             }
2572         }
2573     }
2574
2575     if($hostfw_options->{optimize}){
2576
2577         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2578         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2579         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2580     }
2581
2582     # fixme: what log level should we use here?
2583     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2584
2585     # fixme: should we really block inter-bridge traffic?
2586
2587     # always allow traffic from containers?
2588     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2589
2590     # disable interbridge routing
2591     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2592     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2593     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2594     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2595     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2596     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2597
2598     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2599 }
2600
2601 sub get_ruleset_status {
2602     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2603
2604     my $statushash = {};
2605
2606     foreach my $chain (sort keys %$ruleset) {
2607         my $sig = &$digest_fn($ruleset->{$chain});
2608
2609         $statushash->{$chain}->{sig} = $sig;
2610
2611         my $oldsig = $active_chains->{$chain};
2612         if (!defined($oldsig)) {
2613             $statushash->{$chain}->{action} = 'create';
2614         } else {
2615             if ($oldsig eq $sig) {
2616                 $statushash->{$chain}->{action} = 'exists';
2617             } else {
2618                 $statushash->{$chain}->{action} = 'update';
2619             }
2620         }
2621         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2622         foreach my $cmd (@{$ruleset->{$chain}}) {
2623             print "\t$cmd\n" if $verbose;
2624         }
2625     }
2626
2627     foreach my $chain (sort keys %$active_chains) {
2628         if (!defined($ruleset->{$chain})) {
2629             my $sig = $active_chains->{$chain};
2630             $statushash->{$chain}->{action} = 'delete';
2631             $statushash->{$chain}->{sig} = $sig;
2632             print "delete $chain ($sig)\n" if $verbose;
2633         }
2634     }
2635
2636     return $statushash;
2637 }
2638
2639 sub print_sig_rule {
2640     my ($chain, $sig) = @_;
2641
2642     # We just use this to store a SHA1 checksum used to detect changes
2643     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2644 }
2645
2646 sub get_ruleset_cmdlist {
2647     my ($ruleset, $verbose) = @_;
2648
2649     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2650
2651     my ($active_chains, $hooks) = iptables_get_chains();
2652     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2653
2654     # create missing chains first
2655     foreach my $chain (sort keys %$ruleset) {
2656         my $stat = $statushash->{$chain};
2657         die "internal error" if !$stat;
2658         next if $stat->{action} ne 'create';
2659
2660         $cmdlist .= ":$chain - [0:0]\n";
2661     }
2662
2663     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2664         if (!$hooks->{$h}) {
2665             $cmdlist .= "-A $h -j PVEFW-$h\n";
2666         }
2667     }
2668
2669     foreach my $chain (sort keys %$ruleset) {
2670         my $stat = $statushash->{$chain};
2671         die "internal error" if !$stat;
2672
2673         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2674             $cmdlist .= "-F $chain\n";
2675             foreach my $cmd (@{$ruleset->{$chain}}) {
2676                 $cmdlist .= "$cmd\n";
2677             }
2678             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2679         } elsif ($stat->{action} eq 'delete') {
2680             die "internal error"; # this should not happen
2681         } elsif ($stat->{action} eq 'exists') {
2682             # do nothing
2683         } else {
2684             die "internal error - unknown status '$stat->{action}'";
2685         }
2686     }
2687
2688     foreach my $chain (keys %$statushash) {
2689         next if $statushash->{$chain}->{action} ne 'delete';
2690         $cmdlist .= "-F $chain\n";
2691     }
2692     foreach my $chain (keys %$statushash) {
2693         next if $statushash->{$chain}->{action} ne 'delete';
2694         next if $chain eq 'PVEFW-INPUT';
2695         next if $chain eq 'PVEFW-OUTPUT';
2696         next if $chain eq 'PVEFW-FORWARD';
2697         $cmdlist .= "-X $chain\n";
2698     }
2699
2700     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2701
2702     $cmdlist .= "COMMIT\n";
2703
2704     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2705 }
2706
2707 sub get_ipset_cmdlist {
2708     my ($ruleset, $verbose) = @_;
2709
2710     my $cmdlist = "";
2711
2712     my $delete_cmdlist = "";
2713
2714     my $active_chains = ipset_get_chains();
2715     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2716
2717     # remove stale _swap chains
2718     foreach my $chain (keys %$active_chains) {
2719         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2720             $cmdlist .= "destroy $chain\n";
2721         }
2722     }
2723
2724     foreach my $chain (sort keys %$ruleset) {
2725         my $stat = $statushash->{$chain};
2726         die "internal error" if !$stat;
2727
2728         if ($stat->{action} eq 'create') {
2729             foreach my $cmd (@{$ruleset->{$chain}}) {
2730                 $cmdlist .= "$cmd\n";
2731             }
2732         }
2733
2734         if ($stat->{action} eq 'update') {
2735             my $chain_swap = $chain."_swap";
2736
2737             foreach my $cmd (@{$ruleset->{$chain}}) {
2738                 $cmd =~ s/$chain/$chain_swap/;
2739                 $cmdlist .= "$cmd\n";
2740             }
2741             $cmdlist .= "swap $chain_swap $chain\n";
2742             $cmdlist .= "flush $chain_swap\n";
2743             $cmdlist .= "destroy $chain_swap\n";
2744         }
2745
2746     }
2747
2748     foreach my $chain (keys %$statushash) {
2749         next if $statushash->{$chain}->{action} ne 'delete';
2750
2751         $delete_cmdlist .= "flush $chain\n";
2752         $delete_cmdlist .= "destroy $chain\n";
2753     }
2754
2755     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2756
2757     return ($cmdlist, $delete_cmdlist, $changes);
2758 }
2759
2760 sub apply_ruleset {
2761     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2762
2763     enable_bridge_firewall();
2764
2765     update_nf_conntrack_max($hostfw_conf);
2766
2767     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2768
2769     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2770         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2771
2772     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2773
2774     if ($verbose) {
2775         if ($ipset_changes) {
2776             print "ipset changes:\n";
2777             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2778             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2779         }
2780
2781         if ($changes) {
2782             print "iptables changes:\n";
2783             print $cmdlist;
2784         }
2785     }
2786
2787     ipset_restore_cmdlist($ipset_create_cmdlist);
2788
2789     iptables_restore_cmdlist($cmdlist);
2790
2791     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2792
2793     # test: re-read status and check if everything is up to date
2794     my $active_chains = iptables_get_chains();
2795     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2796
2797     my $errors;
2798     foreach my $chain (sort keys %$ruleset) {
2799         my $stat = $statushash->{$chain};
2800         if ($stat->{action} ne 'exists') {
2801             warn "unable to update chain '$chain'\n";
2802             $errors = 1;
2803         }
2804     }
2805
2806     die "unable to apply firewall changes\n" if $errors;
2807 }
2808
2809 sub update_nf_conntrack_max {
2810     my ($hostfw_conf) = @_;
2811
2812     my $max = 65536; # reasonable default
2813
2814     my $options = $hostfw_conf->{options} || {};
2815
2816     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2817         $max = $options->{nf_conntrack_max};
2818         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2819     }
2820
2821     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2822     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2823
2824     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2825
2826     if ($current != $max) {
2827         my $hashsize = int($max/4);
2828         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2829         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2830     }
2831 }
2832
2833 sub update_nf_conntrack_tcp_timeout_established {
2834     my ($hostfw_conf) = @_;
2835
2836     my $options = $hostfw_conf->{options} || {};
2837
2838     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2839
2840     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2841 }
2842
2843 sub remove_pvefw_chains {
2844
2845     my ($chash, $hooks) = iptables_get_chains();
2846     my $cmdlist = "*filter\n";
2847
2848     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2849         if ($hooks->{$h}) {
2850             $cmdlist .= "-D $h -j PVEFW-$h\n";
2851         }
2852     }
2853
2854     foreach my $chain (keys %$chash) {
2855         $cmdlist .= "-F $chain\n";
2856     }
2857
2858     foreach my $chain (keys %$chash) {
2859         $cmdlist .= "-X $chain\n";
2860     }
2861     $cmdlist .= "COMMIT\n";
2862
2863     iptables_restore_cmdlist($cmdlist);
2864 }
2865
2866 sub update {
2867     my ($start, $verbose) = @_;
2868
2869     my $code = sub {
2870         my $status = read_pvefw_status();
2871
2872         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2873
2874         if ($start || $status eq 'active') {
2875
2876             save_pvefw_status('active') if ($status ne 'active');
2877
2878             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2879         } else {
2880             print "Firewall not active (status = $status)\n" if $verbose;
2881         }
2882     };
2883
2884     run_locked($code);
2885 }
2886
2887
2888 1;