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 dir_glob_foreach);
  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 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  60     description => "Log level.",
  61     type => 'string',
  62     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  63     optional => 1,
  64 });
  65
  66 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  67 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  68
  69 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  70     description => "Security Group name.",
  71     type => 'string',
  72     pattern => $security_group_name_pattern,
  73     minLength => 2,
  74     maxLength => 20,
  75 });
  76
  77 my $feature_ipset_nomatch = 0;
  78 eval  {
  79     my (undef, undef, $release) = POSIX::uname();
  80     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  81         my ($major, $minor) = ($1, $2);
  82         $feature_ipset_nomatch = 1 if ($major > 3) ||
  83             ($major == 3 && $minor >= 7);
  84     }
  85
  86 };
  87
  88 use Data::Dumper;
  89
  90 my $nodename = PVE::INotify::nodename();
  91
  92 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  93 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  94
  95 my $default_log_level = 'info';
  96
  97 my $log_level_hash = {
  98     debug => 7,
  99     info => 6,
 100     notice => 5,
 101     warning => 4,
 102     err => 3,
 103     crit => 2,
 104     alert => 1,
 105     emerg => 0,
 106 };
 107
 108 # imported/converted from: /usr/share/shorewall/macro.*
 109 my $pve_fw_macros = {
 110     'Amanda' => [
 111         "Amanda Backup",
 112         { action => 'PARAM', proto => 'udp', dport => '10080' },
 113         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 114     ],
 115     'Auth' => [
 116         "Auth (identd) traffic",
 117         { action => 'PARAM', proto => 'tcp', dport => '113' },
 118     ],
 119     'BGP' => [
 120         "Border Gateway Protocol traffic",
 121         { action => 'PARAM', proto => 'tcp', dport => '179' },
 122     ],
 123     'BitTorrent' => [
 124         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 125         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 126         { action => 'PARAM', proto => 'udp', dport => '6881' },
 127     ],
 128     'BitTorrent32' => [
 129         "BitTorrent traffic for BitTorrent 3.2 and later",
 130         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 131         { action => 'PARAM', proto => 'udp', dport => '6881' },
 132     ],
 133     'CVS' => [
 134         "Concurrent Versions System pserver traffic",
 135         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 136     ],
 137     'Citrix' => [
 138         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 139         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 140         { action => 'PARAM', proto => 'udp', dport => '1604' },
 141         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 142     ],
 143     'DAAP' => [
 144         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 145         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 146         { action => 'PARAM', proto => 'udp', dport => '3689' },
 147     ],
 148     'DCC' => [
 149         "Distributed Checksum Clearinghouse spam filtering mechanism",
 150         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 151     ],
 152     'DHCPfwd' => [
 153         "Forwarded DHCP traffic (bidirectional)",
 154         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 155         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 156     ],
 157     'DNS' => [
 158         "Domain Name System traffic (upd and tcp)",
 159         { action => 'PARAM', proto => 'udp', dport => '53' },
 160         { action => 'PARAM', proto => 'tcp', dport => '53' },
 161     ],
 162     'Distcc' => [
 163         "Distributed Compiler service",
 164         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 165     ],
 166     'FTP' => [
 167         "File Transfer Protocol",
 168         { action => 'PARAM', proto => 'tcp', dport => '21' },
 169     ],
 170     'Finger' => [
 171         "Finger protocol (RFC 742)",
 172         { action => 'PARAM', proto => 'tcp', dport => '79' },
 173     ],
 174     'GNUnet' => [
 175         "GNUnet secure peer-to-peer networking traffic",
 176         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 177         { action => 'PARAM', proto => 'udp', dport => '2086' },
 178         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 179         { action => 'PARAM', proto => 'udp', dport => '1080' },
 180     ],
 181     'GRE' => [
 182         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 183         { action => 'PARAM', proto => '47' },
 184         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 185     ],
 186     'Git' => [
 187         "Git distributed revision control traffic",
 188         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 189     ],
 190     'HKP' => [
 191         "OpenPGP HTTP keyserver protocol traffic",
 192         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 193     ],
 194     'HTTP' => [
 195         "Hypertext Transfer Protocol (WWW)",
 196         { action => 'PARAM', proto => 'tcp', dport => '80' },
 197     ],
 198     'HTTPS' => [
 199         "Hypertext Transfer Protocol (WWW) over SSL",
 200         { action => 'PARAM', proto => 'tcp', dport => '443' },
 201     ],
 202     'ICPV2' => [
 203         "Internet Cache Protocol V2 (Squid) traffic",
 204         { action => 'PARAM', proto => 'udp', dport => '3130' },
 205     ],
 206     'ICQ' => [
 207         "AOL Instant Messenger traffic",
 208         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 209     ],
 210     'IMAP' => [
 211         "Internet Message Access Protocol",
 212         { action => 'PARAM', proto => 'tcp', dport => '143' },
 213     ],
 214     'IMAPS' => [
 215         "Internet Message Access Protocol over SSL",
 216         { action => 'PARAM', proto => 'tcp', dport => '993' },
 217     ],
 218     'IPIP' => [
 219         "IPIP capsulation traffic (bidirectional)",
 220         { action => 'PARAM', proto => '94' },
 221         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 222     ],
 223     'IPsec' => [
 224         "IPsec traffic (bidirectional)",
 225         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 226         { action => 'PARAM', proto => '50' },
 227         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 228         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 229     ],
 230     'IPsecah' => [
 231         "IPsec authentication (AH) traffic (bidirectional)",
 232         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 233         { action => 'PARAM', proto => '51' },
 234         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 236     ],
 237     'IPsecnat' => [
 238         "IPsec traffic and Nat-Traversal (bidirectional)",
 239         { action => 'PARAM', proto => 'udp', dport => '500' },
 240         { action => 'PARAM', proto => 'udp', dport => '4500' },
 241         { action => 'PARAM', proto => '50' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 243         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 244         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 245     ],
 246     'IRC' => [
 247         "Internet Relay Chat traffic",
 248         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 249     ],
 250     'Jetdirect' => [
 251         "HP Jetdirect printing",
 252         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 253     ],
 254     'L2TP' => [
 255         "Layer 2 Tunneling Protocol traffic",
 256         { action => 'PARAM', proto => 'udp', dport => '1701' },
 257         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 258     ],
 259     'LDAP' => [
 260         "Lightweight Directory Access Protocol traffic",
 261         { action => 'PARAM', proto => 'tcp', dport => '389' },
 262     ],
 263     'LDAPS' => [
 264         "Secure Lightweight Directory Access Protocol traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '636' },
 266     ],
 267     'MSNP' => [
 268         "Microsoft Notification Protocol",
 269         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 270     ],
 271     'MSSQL' => [
 272         "Microsoft SQL Server",
 273         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 274     ],
 275     'Mail' => [
 276         "Mail traffic (SMTP, SMTPS, Submission)",
 277         { action => 'PARAM', proto => 'tcp', dport => '25' },
 278         { action => 'PARAM', proto => 'tcp', dport => '465' },
 279         { action => 'PARAM', proto => 'tcp', dport => '587' },
 280     ],
 281     'Munin' => [
 282         "Munin networked resource monitoring traffic",
 283         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 284     ],
 285     'MySQL' => [
 286         "MySQL server",
 287         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 288     ],
 289     'NNTP' => [
 290         "NNTP traffic (Usenet).",
 291         { action => 'PARAM', proto => 'tcp', dport => '119' },
 292     ],
 293     'NNTPS' => [
 294         "Encrypted NNTP traffic (Usenet)",
 295         { action => 'PARAM', proto => 'tcp', dport => '563' },
 296     ],
 297     'NTP' => [
 298         "Network Time Protocol (ntpd)",
 299         { action => 'PARAM', proto => 'udp', dport => '123' },
 300     ],
 301     'NTPbi' => [
 302         "Bi-directional NTP (for NTP peers)",
 303         { action => 'PARAM', proto => 'udp', dport => '123' },
 304         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 305     ],
 306     'OSPF' => [
 307         "OSPF multicast traffic",
 308         { action => 'PARAM', proto => '89' },
 309     ],
 310     'OpenVPN' => [
 311         "OpenVPN traffic",
 312         { action => 'PARAM', proto => 'udp', dport => '1194' },
 313     ],
 314     'PCA' => [
 315         "Symantec PCAnywere (tm)",
 316         { action => 'PARAM', proto => 'udp', dport => '5632' },
 317         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 318     ],
 319     'POP3' => [
 320         "POP3 traffic",
 321         { action => 'PARAM', proto => 'tcp', dport => '110' },
 322     ],
 323     'POP3S' => [
 324         "Encrypted POP3 traffic",
 325         { action => 'PARAM', proto => 'tcp', dport => '995' },
 326     ],
 327     'PPtP' => [
 328         "Point-to-Point Tunneling Protocol",
 329         { action => 'PARAM', proto => '47' },
 330         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 331         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 332     ],
 333     'Ping' => [
 334         "ICMP echo request",
 335         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 336     ],
 337     'PostgreSQL' => [
 338         "PostgreSQL server",
 339         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 340     ],
 341     'Printer' => [
 342         "Line Printer protocol printing",
 343         { action => 'PARAM', proto => 'tcp', dport => '515' },
 344     ],
 345     'RDP' => [
 346         "Microsoft Remote Desktop Protocol traffic",
 347         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 348     ],
 349     'RIPbi' => [
 350         "Routing Information Protocol (bidirectional)",
 351         { action => 'PARAM', proto => 'udp', dport => '520' },
 352         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 353     ],
 354     'RNDC' => [
 355         "BIND remote management protocol",
 356         { action => 'PARAM', proto => 'tcp', dport => '953' },
 357     ],
 358     'Razor' => [
 359         "Razor Antispam System",
 360         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 361     ],
 362     'Rdate' => [
 363         "Remote time retrieval (rdate)",
 364         { action => 'PARAM', proto => 'tcp', dport => '37' },
 365     ],
 366     'Rsync' => [
 367         "Rsync server",
 368         { action => 'PARAM', proto => 'tcp', dport => '873' },
 369     ],
 370     'SANE' => [
 371         "SANE network scanning",
 372         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 373     ],
 374     'SMB' => [
 375         "Microsoft SMB traffic",
 376         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 377         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 378         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 379         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 380     ],
 381     'SMBBI' => [
 382         "Microsoft SMB traffic (bidirectional)",
 383         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 384         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 385         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 386         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 387         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 388         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 389         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 390         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 391     ],
 392     'SMBswat' => [
 393         "Samba Web Administration Tool",
 394         { action => 'PARAM', proto => 'tcp', dport => '901' },
 395     ],
 396     'SMTP' => [
 397         "Simple Mail Transfer Protocol",
 398         { action => 'PARAM', proto => 'tcp', dport => '25' },
 399     ],
 400     'SMTPS' => [
 401         "Encrypted Simple Mail Transfer Protocol",
 402         { action => 'PARAM', proto => 'tcp', dport => '465' },
 403     ],
 404     'SNMP' => [
 405         "Simple Network Management Protocol",
 406         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 407         { action => 'PARAM', proto => 'tcp', dport => '161' },
 408     ],
 409     'SPAMD' => [
 410         "Spam Assassin SPAMD traffic",
 411         { action => 'PARAM', proto => 'tcp', dport => '783' },
 412     ],
 413     'SSH' => [
 414         "Secure shell traffic",
 415         { action => 'PARAM', proto => 'tcp', dport => '22' },
 416     ],
 417     'SVN' => [
 418         "Subversion server (svnserve)",
 419         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 420     ],
 421     'SixXS' => [
 422         "SixXS IPv6 Deployment and Tunnel Broker",
 423         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 424         { action => 'PARAM', proto => 'udp', dport => '3740' },
 425         { action => 'PARAM', proto => '41' },
 426         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 427     ],
 428     'Squid' => [
 429         "Squid web proxy traffic",
 430         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 431     ],
 432     'Submission' => [
 433         "Mail message submission traffic",
 434         { action => 'PARAM', proto => 'tcp', dport => '587' },
 435     ],
 436     'Syslog' => [
 437         "Syslog protocol (RFC 5424) traffic",
 438         { action => 'PARAM', proto => 'udp', dport => '514' },
 439         { action => 'PARAM', proto => 'tcp', dport => '514' },
 440     ],
 441     'TFTP' => [
 442         "Trivial File Transfer Protocol traffic",
 443         { action => 'PARAM', proto => 'udp', dport => '69' },
 444     ],
 445     'Telnet' => [
 446         "Telnet traffic",
 447         { action => 'PARAM', proto => 'tcp', dport => '23' },
 448     ],
 449     'Telnets' => [
 450         "Telnet over SSL",
 451         { action => 'PARAM', proto => 'tcp', dport => '992' },
 452     ],
 453     'Time' => [
 454         "RFC 868 Time protocol",
 455         { action => 'PARAM', proto => 'tcp', dport => '37' },
 456     ],
 457     'Trcrt' => [
 458         "Traceroute (for up to 30 hops) traffic",
 459         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 460         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 461     ],
 462     'VNC' => [
 463         "VNC traffic for VNC display's 0 - 9",
 464         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 465     ],
 466     'VNCL' => [
 467         "VNC traffic from Vncservers to Vncviewers in listen mode",
 468         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 469     ],
 470     'Web' => [
 471         "WWW traffic (HTTP and HTTPS)",
 472         { action => 'PARAM', proto => 'tcp', dport => '80' },
 473         { action => 'PARAM', proto => 'tcp', dport => '443' },
 474     ],
 475     'Webcache' => [
 476         "Web Cache/Proxy traffic (port 8080)",
 477         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 478     ],
 479     'Webmin' => [
 480         "Webmin traffic",
 481         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 482     ],
 483     'Whois' => [
 484         "Whois (nicname, RFC 3912) traffic",
 485         { action => 'PARAM', proto => 'tcp', dport => '43' },
 486     ],
 487 };
 488
 489 my $pve_fw_parsed_macros;
 490 my $pve_fw_macro_descr;
 491 my $pve_fw_preferred_macro_names = {};
 492
 493 my $pve_std_chains = {
 494     'PVEFW-SET-ACCEPT-MARK' => [
 495         "-j MARK --set-mark 1",
 496     ],
 497     'PVEFW-DropBroadcast' => [
 498         # same as shorewall 'Broadcast'
 499         # simply DROP BROADCAST/MULTICAST/ANYCAST
 500         # we can use this to reduce logging
 501         { action => 'DROP', dsttype => 'BROADCAST' },
 502         { action => 'DROP', dsttype => 'MULTICAST' },
 503         { action => 'DROP', dsttype => 'ANYCAST' },
 504         { action => 'DROP', dest => '224.0.0.0/4' },
 505     ],
 506     'PVEFW-reject' => [
 507         # same as shorewall 'reject'
 508         { action => 'DROP', dsttype => 'BROADCAST' },
 509         { action => 'DROP', source => '224.0.0.0/4' },
 510         { action => 'DROP', proto => 'icmp' },
 511         "-p tcp -j REJECT --reject-with tcp-reset",
 512         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 513         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 514         "-j REJECT --reject-with icmp-host-prohibited",
 515     ],
 516     'PVEFW-Drop' => [
 517         # same as shorewall 'Drop', which is equal to DROP,
 518         # but REJECT/DROP some packages to reduce logging,
 519         # and ACCEPT critical ICMP types
 520         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 521         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 522         { action => 'PVEFW-DropBroadcast' },
 523         # ACCEPT critical ICMP types
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 525         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 526         # Drop packets with INVALID state
 527         "-m conntrack --ctstate INVALID -j DROP",
 528         # Drop Microsoft SMB noise
 529         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 530         { action => 'DROP', proto => 'udp', dport => '137:139'},
 531         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 532         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 533         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 534         # Drop new/NotSyn traffic so that it doesn't get logged
 535         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 536         # Drop DNS replies
 537         { action => 'DROP', proto => 'udp', sport => 53 },
 538     ],
 539     'PVEFW-Reject' => [
 540         # same as shorewall 'Reject', which is equal to Reject,
 541         # but REJECT/DROP some packages to reduce logging,
 542         # and ACCEPT critical ICMP types
 543         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 544         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 545         { action => 'PVEFW-DropBroadcast' },
 546         # ACCEPT critical ICMP types
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 548         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 549         # Drop packets with INVALID state
 550         "-m conntrack --ctstate INVALID -j DROP",
 551         # Drop Microsoft SMB noise
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 554         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 555         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 556         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 557         # Drop new/NotSyn traffic so that it doesn't get logged
 558         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 559         # Drop DNS replies
 560         { action => 'DROP', proto => 'udp', sport => 53 },
 561     ],
 562     'PVEFW-tcpflags' => [
 563         # same as shorewall tcpflags action.
 564         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 568         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 569         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 570     ],
 571     'PVEFW-smurfs' => [
 572         # same as shorewall smurfs action
 573         # Filter packets for smurfs (packets with a broadcast address as the source).
 574         "-s 0.0.0.0/32 -j RETURN",
 575         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 576         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 577     ],
 578 };
 579
 580 # iptables -p icmp -h
 581 my $icmp_type_names = {
 582     any => 1,
 583     'echo-reply' => 1,
 584     'destination-unreachable' => 1,
 585     'network-unreachable' => 1,
 586     'host-unreachable' => 1,
 587     'protocol-unreachable' => 1,
 588     'port-unreachable' => 1,
 589     'fragmentation-needed' => 1,
 590     'source-route-failed' => 1,
 591     'network-unknown' => 1,
 592     'host-unknown' => 1,
 593     'network-prohibited' => 1,
 594     'host-prohibited' => 1,
 595     'TOS-network-unreachable' => 1,
 596     'TOS-host-unreachable' => 1,
 597     'communication-prohibited' => 1,
 598     'host-precedence-violation' => 1,
 599     'precedence-cutoff' => 1,
 600     'source-quench' => 1,
 601     'redirect' => 1,
 602     'network-redirect' => 1,
 603     'host-redirect' => 1,
 604     'TOS-network-redirect' => 1,
 605     'TOS-host-redirect' => 1,
 606     'echo-request' => 1,
 607     'router-advertisement' => 1,
 608     'router-solicitation' => 1,
 609     'time-exceeded' => 1,
 610     'ttl-zero-during-transit' => 1,
 611     'ttl-zero-during-reassembly' => 1,
 612     'parameter-problem' => 1,
 613     'ip-header-bad' => 1,
 614     'required-option-missing' => 1,
 615     'timestamp-request' => 1,
 616     'timestamp-reply' => 1,
 617     'address-mask-request' => 1,
 618     'address-mask-reply' => 1,
 619 };
 620
 621 sub init_firewall_macros {
 622
 623     $pve_fw_parsed_macros = {};
 624
 625     foreach my $k (keys %$pve_fw_macros) {
 626         my $lc_name = lc($k);
 627         my $macro = $pve_fw_macros->{$k};
 628         if (!ref($macro->[0])) {
 629             $pve_fw_macro_descr->{$k} = shift @$macro;
 630         }
 631         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 632         $pve_fw_parsed_macros->{$k} = $macro;
 633     }
 634 }
 635
 636 init_firewall_macros();
 637
 638 sub get_macros {
 639     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 640 }
 641
 642 my $etc_services;
 643
 644 sub get_etc_services {
 645
 646     return $etc_services if $etc_services;
 647
 648     my $filename = "/etc/services";
 649
 650     my $fh = IO::File->new($filename, O_RDONLY);
 651     if (!$fh) {
 652         warn "unable to read '$filename' - $!\n";
 653         return {};
 654     }
 655
 656     my $services = {};
 657
 658     while (my $line = <$fh>) {
 659         chomp ($line);
 660         next if $line =~m/^#/;
 661         next if ($line =~m/^\s*$/);
 662
 663         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 664             $services->{byid}->{$2}->{name} = $1;
 665             $services->{byid}->{$2}->{port} = $2;
 666             $services->{byid}->{$2}->{$3} = 1;
 667             $services->{byname}->{$1} = $services->{byid}->{$2};
 668         }
 669     }
 670
 671     close($fh);
 672
 673     $etc_services = $services;
 674
 675
 676     return $etc_services;
 677 }
 678
 679 my $etc_protocols;
 680
 681 sub get_etc_protocols {
 682     return $etc_protocols if $etc_protocols;
 683
 684     my $filename = "/etc/protocols";
 685
 686     my $fh = IO::File->new($filename, O_RDONLY);
 687     if (!$fh) {
 688         warn "unable to read '$filename' - $!\n";
 689         return {};
 690     }
 691
 692     my $protocols = {};
 693
 694     while (my $line = <$fh>) {
 695         chomp ($line);
 696         next if $line =~m/^#/;
 697         next if ($line =~m/^\s*$/);
 698
 699         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 700             $protocols->{byid}->{$2}->{name} = $1;
 701             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 702         }
 703     }
 704
 705     close($fh);
 706
 707     $etc_protocols = $protocols;
 708
 709     return $etc_protocols;
 710 }
 711
 712 sub parse_address_list {
 713     my ($str) = @_;
 714
 715     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 716     return if $str =~ m/^${ip_alias_pattern}$/;
 717
 718     my $count = 0;
 719     my $iprange = 0;
 720     foreach my $elem (split(/,/, $str)) {
 721         $count++;
 722         if (!Net::IP->new($elem)) {
 723             my $err = Net::IP::Error();
 724             die "invalid IP address: $err\n";
 725         }
 726         $iprange = 1 if $elem =~ m/-/;
 727     }
 728
 729     die "you can use a range in a list\n" if $iprange && $count > 1;
 730 }
 731
 732 sub parse_port_name_number_or_range {
 733     my ($str) = @_;
 734
 735     my $services = PVE::Firewall::get_etc_services();
 736     my $count = 0;
 737     my $icmp_port = 0;
 738
 739     foreach my $item (split(/,/, $str)) {
 740         $count++;
 741         if ($item =~ m/^(\d+):(\d+)$/) {
 742             my ($port1, $port2) = ($1, $2);
 743             die "invalid port '$port1'\n" if $port1 > 65535;
 744             die "invalid port '$port2'\n" if $port2 > 65535;
 745         } elsif ($item =~ m/^(\d+)$/) {
 746             my $port = $1;
 747             die "invalid port '$port'\n" if $port > 65535;
 748         } else {
 749             if ($icmp_type_names->{$item}) {
 750                 $icmp_port = 1;
 751             } else {
 752                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 753             }
 754         }
 755     }
 756
 757     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 758
 759     return $count;
 760 }
 761
 762 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 763 sub pve_fw_verify_port_spec {
 764    my ($portstr) = @_;
 765
 766    parse_port_name_number_or_range($portstr);
 767
 768    return $portstr;
 769 }
 770
 771 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 772 sub pve_fw_verify_v4addr_spec {
 773    my ($list) = @_;
 774
 775    parse_address_list($list);
 776
 777    return $list;
 778 }
 779
 780 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 781 sub pve_fw_verify_protocol_spec {
 782    my ($proto) = @_;
 783
 784    my $protocols = get_etc_protocols();
 785
 786    die "unknown protocol '$proto'\n" if $proto &&
 787        !(defined($protocols->{byname}->{$proto}) ||
 788          defined($protocols->{byid}->{$proto}));
 789
 790    return $proto;
 791 }
 792
 793
 794 # helper function for API
 795
 796 sub copy_opject_with_digest {
 797     my ($object) = @_;
 798
 799     my $sha = Digest::SHA->new('sha1');
 800
 801     my $res = {};
 802     foreach my $k (sort keys %$object) {
 803         my $v = $object->{$k};
 804         next if !defined($v);
 805         $res->{$k} = $v;
 806         $sha->add($k, ':', $v, "\n");
 807     }
 808
 809     my $digest = $sha->b64digest;
 810
 811     $res->{digest} = $digest;
 812
 813     return wantarray ? ($res, $digest) : $res;
 814 }
 815
 816 sub copy_list_with_digest {
 817     my ($list) = @_;
 818
 819     my $sha = Digest::SHA->new('sha1');
 820
 821     my $res = [];
 822     foreach my $entry (@$list) {
 823         my $data = {};
 824         foreach my $k (sort keys %$entry) {
 825             my $v = $entry->{$k};
 826             next if !defined($v);
 827             $data->{$k} = $v;
 828             $sha->add($k, ':', $v, "\n");
 829         }
 830         push @$res, $data;
 831     }
 832
 833     my $digest = $sha->b64digest;
 834
 835     foreach my $entry (@$res) {
 836         $entry->{digest} = $digest;
 837     }
 838
 839     return wantarray ? ($res, $digest) : $res;
 840 }
 841
 842 my $rule_properties = {
 843     pos => {
 844         description => "Update rule at position <pos>.",
 845         type => 'integer',
 846         minimum => 0,
 847         optional => 1,
 848     },
 849     digest => get_standard_option('pve-config-digest'),
 850     type => {
 851         type => 'string',
 852         optional => 1,
 853         enum => ['in', 'out', 'group'],
 854     },
 855     action => {
 856         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 857         type => 'string',
 858         optional => 1,
 859         pattern => $security_group_name_pattern,
 860         maxLength => 20,
 861         minLength => 2,
 862     },
 863     macro => {
 864         type => 'string',
 865         optional => 1,
 866         maxLength => 128,
 867     },
 868     iface => get_standard_option('pve-iface', { optional => 1 }),
 869     source => {
 870         type => 'string', format => 'pve-fw-v4addr-spec',
 871         optional => 1,
 872     },
 873     dest => {
 874         type => 'string', format => 'pve-fw-v4addr-spec',
 875         optional => 1,
 876     },
 877     proto => {
 878         type => 'string', format => 'pve-fw-protocol-spec',
 879         optional => 1,
 880     },
 881     enable => {
 882         type => 'boolean',
 883         optional => 1,
 884     },
 885     sport => {
 886         type => 'string', format => 'pve-fw-port-spec',
 887         optional => 1,
 888     },
 889     dport => {
 890         type => 'string', format => 'pve-fw-port-spec',
 891         optional => 1,
 892     },
 893     comment => {
 894         type => 'string',
 895         optional => 1,
 896     },
 897 };
 898
 899 sub add_rule_properties {
 900     my ($properties) = @_;
 901
 902     foreach my $k (keys %$rule_properties) {
 903         my $h = $rule_properties->{$k};
 904         # copy data, so that we can modify later without side effects
 905         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 906     }
 907
 908     return $properties;
 909 }
 910
 911 sub delete_rule_properties {
 912     my ($rule, $delete_str) = @_;
 913
 914     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 915         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 916             if !defined($rule_properties->{$opt});
 917         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 918             if $opt eq 'type' || $opt eq 'action';
 919         delete $rule->{$opt};
 920     }
 921
 922     return $rule;
 923 }
 924
 925 my $apply_macro = sub {
 926     my ($macro_name, $param, $verify) = @_;
 927
 928     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 929     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 930
 931     my $rules = [];
 932
 933     foreach my $templ (@$macro_rules) {
 934         my $rule = {};
 935         my $param_used = {};
 936         foreach my $k (keys %$templ) {
 937             my $v = $templ->{$k};
 938             if ($v eq 'PARAM') {
 939                 $v = $param->{$k};
 940                 $param_used->{$k} = 1;
 941             } elsif ($v eq 'DEST') {
 942                 $v = $param->{dest};
 943                 $param_used->{dest} = 1;
 944             } elsif ($v eq 'SOURCE') {
 945                 $v = $param->{source};
 946                 $param_used->{source} = 1;
 947             }
 948
 949             if (!defined($v)) {
 950                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 951                 raise_param_exc({ macro => $msg }) if $verify;
 952                 die "$msg\n";
 953             }
 954             $rule->{$k} = $v;
 955         }
 956         foreach my $k (keys %$param) {
 957             next if $k eq 'macro';
 958             next if !defined($param->{$k});
 959             next if $param_used->{$k};
 960             if (defined($rule->{$k})) {
 961                 if ($rule->{$k} ne $param->{$k}) {
 962                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 963                     raise_param_exc({ $k => $msg }) if $verify;
 964                     die "$msg\n";
 965                 }
 966             } else {
 967                 $rule->{$k} = $param->{$k};
 968             }
 969         }
 970         push @$rules, $rule;
 971     }
 972
 973     return $rules;
 974 };
 975
 976 sub verify_rule {
 977     my ($rule, $allow_groups) = @_;
 978
 979     my $type = $rule->{type};
 980
 981     raise_param_exc({ type => "missing property"}) if !$type;
 982     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 983
 984     if ($type eq  'in' || $type eq 'out') {
 985         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 986             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 987     } elsif ($type eq 'group') {
 988         raise_param_exc({ type => "security groups not allowed"})
 989             if !$allow_groups;
 990         raise_param_exc({ action => "invalid characters in security group name"})
 991             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
 992     } else {
 993         raise_param_exc({ type => "unknown rule type '$type'"});
 994     }
 995
 996     # fixme: verify $rule->{iface}?
 997
 998     if ($rule->{macro}) {
 999         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1000         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1001         $rule->{macro} = $preferred_name;
1002     }
1003
1004     if ($rule->{dport}) {
1005         eval { parse_port_name_number_or_range($rule->{dport}); };
1006         raise_param_exc({ dport => $@ }) if $@;
1007     }
1008
1009     if ($rule->{sport}) {
1010         eval { parse_port_name_number_or_range($rule->{sport}); };
1011         raise_param_exc({ sport => $@ }) if $@;
1012     }
1013
1014     if ($rule->{source}) {
1015         eval { parse_address_list($rule->{source}); };
1016         raise_param_exc({ source => $@ }) if $@;
1017     }
1018
1019     if ($rule->{dest}) {
1020         eval { parse_address_list($rule->{dest}); };
1021         raise_param_exc({ dest => $@ }) if $@;
1022     }
1023
1024     if ($rule->{macro}) {
1025         &$apply_macro($rule->{macro}, $rule, 1);
1026     }
1027
1028     return $rule;
1029 }
1030
1031 sub copy_rule_data {
1032     my ($rule, $param) = @_;
1033
1034     foreach my $k (keys %$rule_properties) {
1035         if (defined(my $v = $param->{$k})) {
1036             if ($v eq '' || $v eq '-') {
1037                 delete $rule->{$k};
1038             } else {
1039                 $rule->{$k} = $v;
1040             }
1041         } else {
1042             delete $rule->{$k};
1043         }
1044     }
1045
1046     # verify rule now
1047
1048     return $rule;
1049 }
1050
1051 # core functions
1052 my $bridge_firewall_enabled = 0;
1053
1054 sub enable_bridge_firewall {
1055
1056     return if $bridge_firewall_enabled; # only once
1057
1058     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1059     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1060
1061     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1062     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1063
1064     $bridge_firewall_enabled = 1;
1065 }
1066
1067 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1068
1069 sub iptables_restore_cmdlist {
1070     my ($cmdlist) = @_;
1071
1072     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1073 }
1074
1075 sub ipset_restore_cmdlist {
1076     my ($cmdlist) = @_;
1077
1078     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1079 }
1080
1081 sub iptables_get_chains {
1082
1083     my $res = {};
1084
1085     # check what chains we want to track
1086     my $is_pvefw_chain = sub {
1087         my $name = shift;
1088
1089         return 1 if $name =~ m/^PVEFW-\S+$/;
1090
1091         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1092
1093         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1094
1095         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1096
1097         return 1 if $name =~ m/^vmbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1098         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1099
1100         return undef;
1101     };
1102
1103     my $table = '';
1104
1105     my $hooks = {};
1106
1107     my $parser = sub {
1108         my $line = shift;
1109
1110         return if $line =~ m/^#/;
1111         return if $line =~ m/^\s*$/;
1112
1113         if ($line =~ m/^\*(\S+)$/) {
1114             $table = $1;
1115             return;
1116         }
1117
1118         return if $table ne 'filter';
1119
1120         if ($line =~ m/^:(\S+)\s/) {
1121             my $chain = $1;
1122             return if !&$is_pvefw_chain($chain);
1123             $res->{$chain} = "unknown";
1124         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1125             my ($chain, $sig) = ($1, $2);
1126             return if !&$is_pvefw_chain($chain);
1127             $res->{$chain} = $sig;
1128         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1129             $hooks->{$1} = 1;
1130         } else {
1131             # simply ignore the rest
1132             return;
1133         }
1134     };
1135
1136     run_command("/sbin/iptables-save", outfunc => $parser);
1137
1138     return wantarray ? ($res, $hooks) : $res;
1139 }
1140
1141 sub iptables_chain_digest {
1142     my ($rules) = @_;
1143     my $digest = Digest::SHA->new('sha1');
1144     foreach my $rule (@$rules) { # order is important
1145         $digest->add($rule);
1146     }
1147     return $digest->b64digest;
1148 }
1149
1150 sub ipset_chain_digest {
1151     my ($rules) = @_;
1152
1153     my $digest = Digest::SHA->new('sha1');
1154     foreach my $rule (sort @$rules) { # note: sorted
1155         $digest->add($rule);
1156     }
1157     return $digest->b64digest;
1158 }
1159
1160 sub ipset_get_chains {
1161
1162     my $res = {};
1163     my $chains = {};
1164
1165     my $parser = sub {
1166         my $line = shift;
1167
1168         return if $line =~ m/^#/;
1169         return if $line =~ m/^\s*$/;
1170         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1171             my $chain = $1;
1172             $line =~ s/\s+$//; # delete trailing white space
1173             push @{$chains->{$chain}}, $line;
1174         } else {
1175             # simply ignore the rest
1176             return;
1177         }
1178     };
1179
1180     run_command("/usr/sbin/ipset save", outfunc => $parser);
1181
1182     # compute digest for each chain
1183     foreach my $chain (keys %$chains) {
1184         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1185     }
1186
1187     return $res;
1188 }
1189
1190 sub ruleset_generate_cmdstr {
1191     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1192
1193     return if defined($rule->{enable}) && !$rule->{enable};
1194
1195     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1196
1197     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1198     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1199
1200     my @cmd = ();
1201
1202     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1203     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1204
1205     my $source = $rule->{source};
1206     my $dest = $rule->{dest};
1207
1208     if ($source) {
1209         if ($source =~ m/^\+/) {
1210             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1211                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1212                 push @cmd, "-m set --match-set PVEFW-$1 src";
1213             } else {
1214                 die "invalid security group name '$source'\n";
1215             }
1216         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1217             die "no such alias $source\n" if !$cluster_conf->{aliases}->{$source};
1218             push @cmd, "-s $cluster_conf->{aliases}->{$source}";
1219
1220         } elsif ($source =~ m/\-/){
1221             push @cmd, "-m iprange --src-range $source";
1222
1223         } else {
1224             push @cmd, "-s $source";
1225         }
1226     }
1227
1228     if ($dest) {
1229         if ($dest =~ m/^\+/) {
1230             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1231                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1232                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1233             } else {
1234                 die "invalid security group name '$dest'\n";
1235             }
1236         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1237             die "no such alias $dest" if !$cluster_conf->{aliases}->{$dest};
1238             push @cmd, "-d $cluster_conf->{aliases}->{$dest}";
1239
1240         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1241             push @cmd, "-m iprange --dst-range $dest";
1242
1243         } else {
1244             push @cmd, "-d $dest";
1245         }
1246     }
1247
1248     if ($rule->{proto}) {
1249         push @cmd, "-p $rule->{proto}";
1250
1251         my $multiport = 0;
1252         $multiport++ if $nbdport > 1;
1253         $multiport++ if $nbsport > 1;
1254
1255         push @cmd, "--match multiport" if $multiport;
1256
1257         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1258             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1259
1260         if ($rule->{dport}) {
1261             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1262                 # Note: we use dport to store --icmp-type
1263                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1264                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1265             } else {
1266                 if ($nbdport > 1) {
1267                     if ($multiport == 2) {
1268                         push @cmd,  "--ports $rule->{dport}";
1269                     } else {
1270                         push @cmd, "--dports $rule->{dport}";
1271                     }
1272                 } else {
1273                     push @cmd, "--dport $rule->{dport}";
1274                 }
1275             }
1276         }
1277
1278         if ($rule->{sport}) {
1279             if ($nbsport > 1) {
1280                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1281             } else {
1282                 push @cmd, "--sport $rule->{sport}";
1283             }
1284         }
1285     } elsif ($rule->{dport} || $rule->{sport}) {
1286         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1287         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1288     }
1289
1290     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1291
1292     if (my $action = $rule->{action}) {
1293         $action = $actions->{$action} if defined($actions->{$action});
1294         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1295         push @cmd, $goto ? "-g $action" : "-j $action";
1296     }
1297
1298     return scalar(@cmd) ? join(' ', @cmd) : undef;
1299 }
1300
1301 sub ruleset_generate_rule {
1302     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1303
1304     my $rules;
1305
1306     if ($rule->{macro}) {
1307         $rules = &$apply_macro($rule->{macro}, $rule);
1308     } else {
1309         $rules = [ $rule ];
1310     }
1311
1312     foreach my $tmp (@$rules) {
1313         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1314             ruleset_addrule($ruleset, $chain, $cmdstr);
1315         }
1316     }
1317 }
1318
1319 sub ruleset_generate_rule_insert {
1320     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1321
1322     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1323
1324     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1325         ruleset_insertrule($ruleset, $chain, $cmdstr);
1326     }
1327 }
1328
1329 sub ruleset_create_chain {
1330     my ($ruleset, $chain) = @_;
1331
1332     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1333     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1334
1335     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1336
1337     $ruleset->{$chain} = [];
1338 }
1339
1340 sub ruleset_chain_exist {
1341     my ($ruleset, $chain) = @_;
1342
1343     return $ruleset->{$chain} ? 1 : undef;
1344 }
1345
1346 sub ruleset_addrule {
1347    my ($ruleset, $chain, $rule) = @_;
1348
1349    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1350
1351    push @{$ruleset->{$chain}}, "-A $chain $rule";
1352 }
1353
1354 sub ruleset_insertrule {
1355    my ($ruleset, $chain, $rule) = @_;
1356
1357    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1358
1359    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1360 }
1361
1362 sub get_log_rule_base {
1363     my ($chain, $vmid, $msg, $loglevel) = @_;
1364
1365     die "internal error - no log level" if !defined($loglevel);
1366
1367     $vmid = 0 if !defined($vmid);
1368
1369     # Note: we use special format for prefix to pass further
1370     # info to log daemon (VMID, LOGVELEL and CHAIN)
1371
1372     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1373 }
1374
1375 sub ruleset_addlog {
1376     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1377
1378     return if !defined($loglevel);
1379
1380     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1381
1382     $logrule = "$rule $logrule" if defined($rule);
1383
1384     ruleset_addrule($ruleset, $chain, $logrule)
1385 }
1386
1387 sub generate_bridge_chains {
1388     my ($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config) = @_;
1389
1390     my $options = $hostfw_conf->{options} || {};
1391
1392     die "error: detected direct route to bridge '$bridge'\n"
1393         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1394
1395     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1396         ruleset_create_chain($ruleset, "$bridge-FW");
1397         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1398         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1399     }
1400
1401     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1402         ruleset_create_chain($ruleset, "$bridge-OUT");
1403
1404         if($options->{optimize}){
1405             foreach my $interface (@{$bridges_config->{$bridge}}) {
1406                 ruleset_addrule($ruleset, "$bridge-OUT", "-m physdev --physdev-is-bridged --physdev-in $interface -g PVEFW-SET-ACCEPT-MARK");
1407             }
1408         }
1409
1410         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1411         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1412     }
1413
1414     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1415         ruleset_create_chain($ruleset, "$bridge-IN");
1416
1417         if($options->{optimize}){
1418             foreach my $interface (@{$bridges_config->{$bridge}}) {
1419                 ruleset_addrule($ruleset, "$bridge-IN", "-m physdev --physdev-is-bridged --physdev-out $interface -j ACCEPT");
1420             }
1421         }
1422
1423         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1424         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1425         # accept traffic to unmanaged bridge ports
1426         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1427     }
1428 }
1429
1430 sub ruleset_add_chain_policy {
1431     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1432
1433     if ($policy eq 'ACCEPT') {
1434
1435         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1436                               { ACCEPT =>  $accept_action});
1437
1438     } elsif ($policy eq 'DROP') {
1439
1440         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1441
1442         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1443
1444         ruleset_addrule($ruleset, $chain, "-j DROP");
1445     } elsif ($policy eq 'REJECT') {
1446         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1447
1448         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1449
1450         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1451     } else {
1452         # should not happen
1453         die "internal error: unknown policy '$policy'";
1454     }
1455 }
1456
1457 sub ruleset_create_vm_chain {
1458     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1459
1460     ruleset_create_chain($ruleset, $chain);
1461     my $accept = generate_nfqueue($options);
1462
1463     if (!(defined($host_options->{nosmurfs}) && $host_options->{nosmurfs} == 0)) {
1464         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1465     }
1466
1467     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1468         if ($direction eq 'OUT') {
1469             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1470                                                       proto => 'udp', sport => 68, dport => 67 });
1471         } else {
1472             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1473                                                       proto => 'udp', sport => 67, dport => 68 });
1474         }
1475     }
1476
1477     if ($host_options->{tcpflags}) {
1478         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1479     }
1480
1481     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1482     if ($direction eq 'OUT') {
1483         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1484     } else {
1485         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1486     }
1487
1488     if ($direction eq 'OUT') {
1489         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1490             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1491         }
1492         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1493     }
1494 }
1495
1496 sub ruleset_generate_vm_rules {
1497     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1498
1499     my $lc_direction = lc($direction);
1500
1501     foreach my $rule (@$rules) {
1502         next if $rule->{iface} && $rule->{iface} ne $netid;
1503         next if !$rule->{enable};
1504         if ($rule->{type} eq 'group') {
1505             my $group_chain = "GROUP-$rule->{action}-$direction";
1506             if(!ruleset_chain_exist($ruleset, $group_chain)){
1507                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1508             }
1509             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1510             if ($direction eq 'OUT'){
1511                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1512             }else{
1513                 my $accept = generate_nfqueue($options);
1514                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1515             }
1516
1517         } else {
1518             next if $rule->{type} ne $lc_direction;
1519             if ($direction eq 'OUT') {
1520                 ruleset_generate_rule($ruleset, $chain, $rule,
1521                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1522             } else {
1523                 my $accept = generate_nfqueue($options);
1524                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1525             }
1526         }
1527     }
1528 }
1529
1530 sub generate_nfqueue {
1531     my ($options) = @_;
1532
1533     my $action = "";
1534     if($options->{ips}){
1535         $action = "NFQUEUE";
1536         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1537             if(defined($3) && defined($1)) {
1538                 $action .= " --queue-balance $1:$3";
1539             }elsif (defined($1)) {
1540                 $action .= " --queue-num $1";
1541             }
1542         }
1543         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1544     }else{
1545         $action = "ACCEPT";
1546     }
1547
1548     return $action;
1549 }
1550
1551 sub ruleset_generate_vm_ipsrules {
1552     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1553
1554     if ($options->{ips} && $direction eq 'IN') {
1555         my $nfqueue = generate_nfqueue($options);
1556
1557         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1558             ruleset_create_chain($ruleset, "PVEFW-IPS");
1559         }
1560
1561         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1562             ruleset_create_chain($ruleset, "$bridge-IPS");
1563             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1564         }
1565
1566         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1567     }
1568 }
1569
1570 sub generate_venet_rules_direction {
1571     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1572
1573     parse_address_list($ip); # make sure we have a valid $ip list
1574
1575     my $lc_direction = lc($direction);
1576
1577     my $rules = $vmfw_conf->{rules};
1578
1579     my $options = $vmfw_conf->{options};
1580     my $hostfw_options = $vmfw_conf->{options};
1581     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1582
1583     my $chain = "venet0-$vmid-$direction";
1584
1585     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1586
1587     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1588
1589     # implement policy
1590     my $policy;
1591
1592     if ($direction eq 'OUT') {
1593         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1594     } else {
1595         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1596     }
1597
1598     my $accept = generate_nfqueue($options);
1599     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1600     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1601
1602     # plug into FORWARD, INPUT and OUTPUT chain
1603     if ($direction eq 'OUT') {
1604         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1605             action => $chain,
1606             source => $ip,
1607             iface_in => 'venet0'});
1608
1609         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1610             action => $chain,
1611             source => $ip,
1612             iface_in => 'venet0'});
1613     } else {
1614         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1615             action => $chain,
1616             dest => $ip,
1617             iface_out => 'venet0'});
1618
1619         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1620             action => $chain,
1621             dest => $ip,
1622             iface_out => 'venet0'});
1623     }
1624 }
1625
1626 sub generate_tap_rules_direction {
1627     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1628
1629     my $lc_direction = lc($direction);
1630
1631     my $rules = $vmfw_conf->{rules};
1632
1633     my $options = $vmfw_conf->{options};
1634     my $hostfw_options = $hostfw_conf->{options};
1635     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1636
1637     my $tapchain = "$iface-$direction";
1638
1639     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1640
1641     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1642
1643     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1644
1645     # implement policy
1646     my $policy;
1647
1648     if ($direction eq 'OUT') {
1649         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1650     } else {
1651         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1652     }
1653
1654     my $accept = generate_nfqueue($options);
1655     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1656     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1657
1658     # plug the tap chain to bridge chain
1659     if ($direction eq 'IN') {
1660         ruleset_addrule($ruleset, "$bridge-IN",
1661                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1662     } else {
1663         ruleset_addrule($ruleset, "$bridge-OUT",
1664                            "-m physdev --physdev-in $iface -j $tapchain");
1665     }
1666 }
1667
1668 sub enable_host_firewall {
1669     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1670
1671     my $options = $hostfw_conf->{options};
1672     my $cluster_options = $cluster_conf->{options};
1673     my $rules = $hostfw_conf->{rules};
1674     my $cluster_rules = $cluster_conf->{rules};
1675
1676     # host inbound firewall
1677     my $chain = "PVEFW-HOST-IN";
1678     ruleset_create_chain($ruleset, $chain);
1679
1680     my $loglevel = get_option_log_level($options, "log_level_in");
1681
1682     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1683         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1684     }
1685
1686     if ($options->{tcpflags}) {
1687         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1688     }
1689
1690     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1691     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1692     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1693     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1694     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1695     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1696
1697     # we use RETURN because we need to check also tap rules
1698     my $accept_action = 'RETURN';
1699
1700     # add host rules first, so that cluster wide rules can be overwritten
1701     foreach my $rule (@$rules, @$cluster_rules) {
1702         next if $rule->{type} ne 'in';
1703         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1704     }
1705
1706     # implement input policy
1707     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1708     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1709
1710     # host outbound firewall
1711     $chain = "PVEFW-HOST-OUT";
1712     ruleset_create_chain($ruleset, $chain);
1713
1714     $loglevel = get_option_log_level($options, "log_level_out");
1715
1716     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1717     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1718     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1719     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1720     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1721     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1722
1723     # we use RETURN because we may want to check other thigs later
1724     $accept_action = 'RETURN';
1725
1726     # add host rules first, so that cluster wide rules can be overwritten
1727     foreach my $rule (@$rules, @$cluster_rules) {
1728         next if $rule->{type} ne 'out';
1729         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1730     }
1731
1732     # implement output policy
1733     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1734     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1735
1736     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1737     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1738 }
1739
1740 sub generate_group_rules {
1741     my ($ruleset, $cluster_conf, $group) = @_;
1742     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1743
1744     my $rules = $cluster_conf->{groups}->{$group};
1745
1746     my $chain = "GROUP-${group}-IN";
1747
1748     ruleset_create_chain($ruleset, $chain);
1749     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1750
1751     foreach my $rule (@$rules) {
1752         next if $rule->{type} ne 'in';
1753         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1754     }
1755
1756     $chain = "GROUP-${group}-OUT";
1757
1758     ruleset_create_chain($ruleset, $chain);
1759     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1760
1761     foreach my $rule (@$rules) {
1762         next if $rule->{type} ne 'out';
1763         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1764         # check also other tap rules later
1765         ruleset_generate_rule($ruleset, $chain, $rule,
1766                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1767     }
1768 }
1769
1770 my $MAX_NETS = 32;
1771 my $valid_netdev_names = {};
1772 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1773     $valid_netdev_names->{"net$i"} = 1;
1774 }
1775
1776 sub parse_fw_rule {
1777     my ($line, $need_iface, $allow_groups) = @_;
1778
1779     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1780
1781     # we can add single line comments to the end of the rule
1782     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1783
1784     # we can disable a rule when prefixed with '|'
1785     my $enable = 1;
1786
1787     $enable = 0 if $line =~ s/^\|//;
1788
1789     my @data = split(/\s+/, $line);
1790     my $expected_elements = $need_iface ? 8 : 7;
1791
1792     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1793
1794     if ($need_iface) {
1795         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1796     } else {
1797         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1798     }
1799
1800     die "incomplete rule\n" if ! ($type && $action);
1801
1802     my $macro;
1803
1804     $type = lc($type);
1805
1806     if ($type eq  'in' || $type eq 'out') {
1807         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1808             # OK
1809         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1810             $action = $2;
1811             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1812             die "unknown macro '$1'\n" if !$preferred_name;
1813             $macro = $preferred_name;
1814         } else {
1815             die "unknown action '$action'\n";
1816         }
1817     } elsif ($type eq 'group') {
1818         die "wrong number of rule elements\n" if scalar(@data) != 3;
1819         die "groups disabled\n" if !$allow_groups;
1820
1821         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1822     } else {
1823         die "unknown rule type '$type'\n";
1824     }
1825
1826     if ($need_iface) {
1827         $iface = undef if $iface && $iface eq '-';
1828     }
1829
1830     $proto = undef if $proto && $proto eq '-';
1831     pve_fw_verify_protocol_spec($proto) if $proto;
1832
1833     $source = undef if $source && $source eq '-';
1834     $dest = undef if $dest && $dest eq '-';
1835
1836     $dport = undef if $dport && $dport eq '-';
1837     $sport = undef if $sport && $sport eq '-';
1838
1839     parse_port_name_number_or_range($dport) if defined($dport);
1840     parse_port_name_number_or_range($sport) if defined($sport);
1841
1842     parse_address_list($source) if $source;
1843     parse_address_list($dest) if $dest;
1844
1845     return {
1846         type => $type,
1847         enable => $enable,
1848         comment => $comment,
1849         action => $action,
1850         macro => $macro,
1851         iface => $iface,
1852         source => $source,
1853         dest => $dest,
1854         proto => $proto,
1855         dport => $dport,
1856         sport => $sport,
1857     };
1858 }
1859
1860 sub parse_vmfw_option {
1861     my ($line) = @_;
1862
1863     my ($opt, $value);
1864
1865     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1866
1867     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1868         $opt = lc($1);
1869         $value = int($2);
1870     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1871         $opt = lc($1);
1872         $value = $2 ? lc($3) : '';
1873     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1874         $opt = lc($1);
1875         $value = uc($3);
1876     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1877         $opt = lc($1);
1878         $value = $2;
1879     } else {
1880         chomp $line;
1881         die "can't parse option '$line'\n"
1882     }
1883
1884     return ($opt, $value);
1885 }
1886
1887 sub parse_hostfw_option {
1888     my ($line) = @_;
1889
1890     my ($opt, $value);
1891
1892     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1893
1894     if ($line =~ m/^(enable|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1895         $opt = lc($1);
1896         $value = int($2);
1897     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1898         $opt = lc($1);
1899         $value = $2 ? lc($3) : '';
1900     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1901         $opt = lc($1);
1902         $value = int($2);
1903     } else {
1904         chomp $line;
1905         die "can't parse option '$line'\n"
1906     }
1907
1908     return ($opt, $value);
1909 }
1910
1911 sub parse_clusterfw_option {
1912     my ($line) = @_;
1913
1914     my ($opt, $value);
1915
1916     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1917         $opt = lc($1);
1918         $value = int($2);
1919     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1920         $opt = lc($1);
1921         $value = uc($3);
1922     } else {
1923         chomp $line;
1924         die "can't parse option '$line'\n"
1925     }
1926
1927     return ($opt, $value);
1928 }
1929
1930 sub parse_clusterfw_alias {
1931     my ($line) = @_;
1932
1933     my ($opt, $value);
1934     if ($line =~ m/^(\S+)\s(\S+)$/) {
1935         $opt = lc($1);
1936         if($2){
1937             $2 =~ s|/32$||;
1938             pve_verify_ipv4_or_cidr($2) if $2;
1939             $value = $2;
1940         }
1941     } else {
1942         chomp $line;
1943         die "can't parse option '$line'\n";
1944     }
1945
1946     return ($opt, $value);
1947 }
1948
1949 sub parse_vm_fw_rules {
1950     my ($filename, $fh) = @_;
1951
1952     my $res = { rules => [], options => {}};
1953
1954     my $section;
1955
1956     while (defined(my $line = <$fh>)) {
1957         next if $line =~ m/^#/;
1958         next if $line =~ m/^\s*$/;
1959
1960         my $linenr = $fh->input_line_number();
1961         my $prefix = "$filename (line $linenr)";
1962
1963         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1964             $section = lc($1);
1965             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1966             next;
1967         }
1968         if (!$section) {
1969             warn "$prefix: skip line - no section";
1970             next;
1971         }
1972
1973         next if !$res->{$section}; # skip undefined section
1974
1975         if ($section eq 'options') {
1976             eval {
1977                 my ($opt, $value) = parse_vmfw_option($line);
1978                 $res->{options}->{$opt} = $value;
1979             };
1980             warn "$prefix: $@" if $@;
1981             next;
1982         }
1983
1984         my $rule;
1985         eval { $rule = parse_fw_rule($line, 1, 1); };
1986         if (my $err = $@) {
1987             warn "$prefix: $err";
1988             next;
1989         }
1990
1991         push @{$res->{$section}}, $rule;
1992     }
1993
1994     return $res;
1995 }
1996
1997 sub parse_host_fw_rules {
1998     my ($filename, $fh) = @_;
1999
2000     my $res = { rules => [], options => {}};
2001
2002     my $section;
2003
2004     while (defined(my $line = <$fh>)) {
2005         next if $line =~ m/^#/;
2006         next if $line =~ m/^\s*$/;
2007
2008         my $linenr = $fh->input_line_number();
2009         my $prefix = "$filename (line $linenr)";
2010
2011         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2012             $section = lc($1);
2013             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2014             next;
2015         }
2016         if (!$section) {
2017             warn "$prefix: skip line - no section";
2018             next;
2019         }
2020
2021         next if !$res->{$section}; # skip undefined section
2022
2023         if ($section eq 'options') {
2024             eval {
2025                 my ($opt, $value) = parse_hostfw_option($line);
2026                 $res->{options}->{$opt} = $value;
2027             };
2028             warn "$prefix: $@" if $@;
2029             next;
2030         }
2031
2032         my $rule;
2033         eval { $rule = parse_fw_rule($line, 1, 1); };
2034         if (my $err = $@) {
2035             warn "$prefix: $err";
2036             next;
2037         }
2038
2039         push @{$res->{$section}}, $rule;
2040     }
2041
2042     return $res;
2043 }
2044
2045 sub parse_cluster_fw_rules {
2046     my ($filename, $fh) = @_;
2047
2048     my $section;
2049     my $group;
2050
2051     my $res = {
2052         rules => [],
2053         options => {},
2054         groups => {},
2055         group_comments => {},
2056         ipset => {} ,
2057         ipset_comments => {},
2058     };
2059
2060     while (defined(my $line = <$fh>)) {
2061         next if $line =~ m/^#/;
2062         next if $line =~ m/^\s*$/;
2063
2064         my $linenr = $fh->input_line_number();
2065         my $prefix = "$filename (line $linenr)";
2066
2067         if ($line =~ m/^\[options\]$/i) {
2068             $section = 'options';
2069             next;
2070         }
2071
2072         if ($line =~ m/^\[aliases\]$/i) {
2073             $section = 'aliases';
2074             next;
2075         }
2076
2077         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2078             $section = 'groups';
2079             $group = lc($1);
2080             my $comment = $2;
2081             $res->{$section}->{$group} = [];
2082             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2083                 if $comment;
2084             next;
2085         }
2086
2087         if ($line =~ m/^\[rules\]$/i) {
2088             $section = 'rules';
2089             next;
2090         }
2091
2092         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2093             $section = 'ipset';
2094             $group = lc($1);
2095             my $comment = $2;
2096             $res->{$section}->{$group} = [];
2097             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2098                 if $comment;
2099             next;
2100         }
2101
2102         if (!$section) {
2103             warn "$prefix: skip line - no section\n";
2104             next;
2105         }
2106
2107         if ($section eq 'options') {
2108             eval {
2109                 my ($opt, $value) = parse_clusterfw_option($line);
2110                 $res->{options}->{$opt} = $value;
2111             };
2112             warn "$prefix: $@" if $@;
2113         } elsif ($section eq 'aliases') {
2114             eval {
2115                 my ($opt, $value) = parse_clusterfw_alias($line);
2116                 $res->{aliases}->{$opt} = $value;
2117             };
2118             warn "$prefix: $@" if $@;
2119         } elsif ($section eq 'rules') {
2120             my $rule;
2121             eval { $rule = parse_fw_rule($line, 1, 1); };
2122             if (my $err = $@) {
2123                 warn "$prefix: $err";
2124                 next;
2125             }
2126             push @{$res->{$section}}, $rule;
2127         } elsif ($section eq 'groups') {
2128             my $rule;
2129             eval { $rule = parse_fw_rule($line, 0, 0); };
2130             if (my $err = $@) {
2131                 warn "$prefix: $err";
2132                 next;
2133             }
2134             push @{$res->{$section}->{$group}}, $rule;
2135         } elsif ($section eq 'ipset') {
2136             # we can add single line comments to the end of the rule
2137             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2138
2139             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2140             my $nomatch = $1;
2141             my $cidr = $2;
2142
2143             if($cidr !~ m/^${ip_alias_pattern}$/) {
2144                 $cidr =~ s|/32$||;
2145
2146                 eval { pve_verify_ipv4_or_cidr($cidr); };
2147                 if (my $err = $@) {
2148                     warn "$prefix: $cidr - $err";
2149                     next;
2150                 }
2151             }
2152
2153             my $entry = { cidr => $cidr };
2154             $entry->{nomatch} = 1 if $nomatch;
2155             $entry->{comment} = $comment if $comment;
2156
2157             push @{$res->{$section}->{$group}}, $entry;
2158         }
2159     }
2160
2161     return $res;
2162 }
2163
2164 sub run_locked {
2165     my ($code, @param) = @_;
2166
2167     my $timeout = 10;
2168
2169     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2170
2171     die $@ if $@;
2172
2173     return $res;
2174 }
2175
2176 sub read_local_vm_config {
2177
2178     my $openvz = {};
2179     my $qemu = {};
2180
2181     my $vmdata = { openvz => $openvz, qemu => $qemu };
2182
2183     my $vmlist = PVE::Cluster::get_vmlist();
2184     return $vmdata if !$vmlist || !$vmlist->{ids};
2185     my $ids = $vmlist->{ids};
2186
2187     foreach my $vmid (keys %$ids) {
2188         next if !$vmid; # skip VE0
2189         my $d = $ids->{$vmid};
2190         next if !$d->{node} || $d->{node} ne $nodename;
2191         next if !$d->{type};
2192         if ($d->{type} eq 'openvz') {
2193             if ($have_pve_manager) {
2194                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2195                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2196                     $openvz->{$vmid} = $conf;
2197                 }
2198             }
2199         } elsif ($d->{type} eq 'qemu') {
2200             if ($have_qemu_server) {
2201                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2202                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2203                     $qemu->{$vmid} = $conf;
2204                 }
2205             }
2206         }
2207     }
2208
2209     return $vmdata;
2210 };
2211
2212 sub read_bridges_config {
2213
2214     my $bridgehash = {};
2215
2216     dir_glob_foreach('/sys/class/net', 'vmbr(\d+)', sub {
2217         my ($bridge) = @_;
2218
2219         dir_glob_foreach("/sys/class/net/$bridge/brif", '((eth|bond)(\d+)(\.(\d+))?)', sub {
2220             my ($interface) = @_;
2221             push @{$bridgehash->{$bridge}}, $interface;
2222         });
2223     });
2224
2225     return $bridgehash;
2226 };
2227
2228 sub load_vmfw_conf {
2229     my ($vmid) = @_;
2230
2231     my $vmfw_conf = {};
2232
2233     my $filename = "/etc/pve/firewall/$vmid.fw";
2234     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2235         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2236     }
2237
2238     return $vmfw_conf;
2239 }
2240
2241 my $format_rules = sub {
2242     my ($rules, $need_iface) = @_;
2243
2244     my $raw = '';
2245
2246     foreach my $rule (@$rules) {
2247         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2248             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2249             $raw .= uc($rule->{type});
2250             if ($rule->{macro}) {
2251                 $raw .= " $rule->{macro}($rule->{action})";
2252             } else {
2253                 $raw .= " " . $rule->{action};
2254             }
2255             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2256
2257             if ($rule->{type} ne  'group')  {
2258                 $raw .= " " . ($rule->{source} || '-');
2259                 $raw .= " " . ($rule->{dest} || '-');
2260                 $raw .= " " . ($rule->{proto} || '-');
2261                 $raw .= " " . ($rule->{dport} || '-');
2262                 $raw .= " " . ($rule->{sport} || '-');
2263             }
2264
2265             $raw .= " # " . encode('utf8', $rule->{comment})
2266                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2267             $raw .= "\n";
2268         } else {
2269             die "unknown rule type '$rule->{type}'";
2270         }
2271     }
2272
2273     return $raw;
2274 };
2275
2276 my $format_options = sub {
2277     my ($options) = @_;
2278
2279     my $raw = '';
2280
2281     $raw .= "[OPTIONS]\n\n";
2282     foreach my $opt (keys %$options) {
2283         $raw .= "$opt: $options->{$opt}\n";
2284     }
2285     $raw .= "\n";
2286
2287     return $raw;
2288 };
2289
2290 my $format_ipset = sub {
2291     my ($options) = @_;
2292
2293     my $raw = '';
2294
2295     my $nethash = {};
2296     foreach my $entry (@$options) {
2297         $nethash->{$entry->{cidr}} = $entry;
2298     }
2299
2300     foreach my $cidr (sort keys %$nethash) {
2301         my $entry = $nethash->{$cidr};
2302         my $line = $entry->{nomatch} ? '!' : '';
2303         $line .= $entry->{cidr};
2304         $line .= " # " . encode('utf8', $entry->{comment})
2305             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2306         $raw .= "$line\n";
2307     }
2308
2309     return $raw;
2310 };
2311
2312 sub save_vmfw_conf {
2313     my ($vmid, $vmfw_conf) = @_;
2314
2315     my $raw = '';
2316
2317     my $options = $vmfw_conf->{options};
2318     $raw .= &$format_options($options) if scalar(keys %$options);
2319
2320     my $rules = $vmfw_conf->{rules};
2321     if (scalar(@$rules)) {
2322         $raw .= "[RULES]\n\n";
2323         $raw .= &$format_rules($rules, 1);
2324         $raw .= "\n";
2325     }
2326
2327     my $filename = "/etc/pve/firewall/$vmid.fw";
2328     PVE::Tools::file_set_contents($filename, $raw);
2329 }
2330
2331 sub read_vm_firewall_configs {
2332     my ($vmdata) = @_;
2333     my $vmfw_configs = {};
2334
2335     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2336         my $vmfw_conf = load_vmfw_conf($vmid);
2337         next if !$vmfw_conf->{options}; # skip if file does not exists
2338         $vmfw_configs->{$vmid} = $vmfw_conf;
2339     }
2340
2341     return $vmfw_configs;
2342 }
2343
2344 sub get_option_log_level {
2345     my ($options, $k) = @_;
2346
2347     my $v = $options->{$k};
2348     $v = $default_log_level if !defined($v);
2349
2350     return undef if $v eq '' || $v eq 'nolog';
2351
2352     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2353
2354     return $v if ($v >= 0) && ($v <= 7);
2355
2356     warn "unknown log level ($k = '$v')\n";
2357
2358     return undef;
2359 }
2360
2361 sub generate_std_chains {
2362     my ($ruleset, $options) = @_;
2363
2364     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2365
2366     # same as shorewall smurflog.
2367     my $chain = 'PVEFW-smurflog';
2368     $pve_std_chains->{$chain} = [];
2369
2370     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2371     push @{$pve_std_chains->{$chain}}, "-j DROP";
2372
2373     # same as shorewall logflags action.
2374     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2375     $chain = 'PVEFW-logflags';
2376     $pve_std_chains->{$chain} = [];
2377
2378     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2379     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2380     push @{$pve_std_chains->{$chain}}, "-j DROP";
2381
2382     foreach my $chain (keys %$pve_std_chains) {
2383         ruleset_create_chain($ruleset, $chain);
2384         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2385             if (ref($rule)) {
2386                 ruleset_generate_rule($ruleset, $chain, $rule);
2387             } else {
2388                 ruleset_addrule($ruleset, $chain, $rule);
2389             }
2390         }
2391     }
2392 }
2393
2394 sub generate_ipset_chains {
2395     my ($ipset_ruleset, $fw_conf) = @_;
2396
2397     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2398         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2399     }
2400 }
2401
2402 sub generate_ipset {
2403     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2404
2405     my $hashsize = scalar(@$options);
2406     if ($hashsize <= 64) {
2407         $hashsize = 64;
2408     } else {
2409         $hashsize = round_powerof2($hashsize);
2410     }
2411
2412     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2413
2414     # remove duplicates
2415     my $nethash = {};
2416     foreach my $entry (@$options) {
2417         my $cidr = $entry->{cidr};
2418         if ($cidr =~ m/^${ip_alias_pattern}$/){
2419             die "no such alias $cidr" if !$aliases->{$cidr};
2420             $entry->{cidr} = $aliases->{$cidr};
2421         }
2422         $nethash->{$entry->{cidr}} = $entry;
2423     }
2424
2425     foreach my $cidr (sort keys %$nethash) {
2426         my $entry = $nethash->{$cidr};
2427
2428         my $cmd = "add $name $cidr";
2429         if ($entry->{nomatch}) {
2430             if ($feature_ipset_nomatch) {
2431                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2432             } else {
2433                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2434             }
2435         } else {
2436             push @{$ipset_ruleset->{$name}}, $cmd;
2437         }
2438     }
2439 }
2440
2441 sub round_powerof2 {
2442     my ($int) = @_;
2443
2444     $int--;
2445     $int |= $int >> $_ foreach (1,2,4,8,16);
2446     return ++$int;
2447 }
2448
2449 sub save_pvefw_status {
2450     my ($status) = @_;
2451
2452     die "unknown status '$status' - internal error"
2453         if $status !~ m/^(stopped|active)$/;
2454
2455     mkdir dirname($pve_fw_status_filename);
2456     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2457 }
2458
2459 sub read_pvefw_status {
2460
2461     my $status = 'unknown';
2462
2463     return 'stopped' if ! -f $pve_fw_status_filename;
2464
2465     eval {
2466         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2467     };
2468     warn $@ if $@;
2469
2470     return $status;
2471 }
2472
2473 # fixme: move to pve-common PVE::ProcFSTools
2474 sub read_proc_net_route {
2475     my $filename = "/proc/net/route";
2476
2477     my $res = {};
2478
2479     my $fh = IO::File->new ($filename, "r");
2480     return $res if !$fh;
2481
2482     my $int_to_quad = sub {
2483         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2484     };
2485
2486     while (defined(my $line = <$fh>)) {
2487         next if $line =~/^Iface\s+Destination/; # skip head
2488         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2489         push @{$res->{$iface}}, {
2490             dest => &$int_to_quad(hex($dest)),
2491             gateway => &$int_to_quad(hex($gateway)),
2492             mask => &$int_to_quad(hex($mask)),
2493             metric => $metric,
2494             mtu => $mtu,
2495         };
2496     }
2497
2498     return $res;
2499 }
2500
2501 sub load_clusterfw_conf {
2502
2503     my $cluster_conf = {};
2504      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2505         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2506     }
2507
2508     return $cluster_conf;
2509 }
2510
2511 sub save_clusterfw_conf {
2512     my ($cluster_conf) = @_;
2513
2514     my $raw = '';
2515
2516     my $options = $cluster_conf->{options};
2517     $raw .= &$format_options($options) if scalar(keys %$options);
2518
2519     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2520         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2521             my $utf8comment = encode('utf8', $comment);
2522             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2523         } else {
2524             $raw .= "[IPSET $ipset]\n\n";
2525         }
2526         my $options = $cluster_conf->{ipset}->{$ipset};
2527         $raw .= &$format_ipset($options);
2528         $raw .= "\n";
2529     }
2530
2531     my $rules = $cluster_conf->{rules};
2532     if (scalar(@$rules)) {
2533         $raw .= "[RULES]\n\n";
2534         $raw .= &$format_rules($rules, 1);
2535         $raw .= "\n";
2536     }
2537
2538     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2539         my $rules = $cluster_conf->{groups}->{$group};
2540         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2541             my $utf8comment = encode('utf8', $comment);
2542             $raw .= "[group $group] # $utf8comment\n\n";
2543         } else {
2544             $raw .= "[group $group]\n\n";
2545         }
2546
2547         $raw .= &$format_rules($rules, 0);
2548         $raw .= "\n";
2549     }
2550
2551     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2552 }
2553
2554 sub load_hostfw_conf {
2555
2556     my $hostfw_conf = {};
2557     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2558         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2559     }
2560     return $hostfw_conf;
2561 }
2562
2563 sub save_hostfw_conf {
2564     my ($hostfw_conf) = @_;
2565
2566     my $raw = '';
2567
2568     my $options = $hostfw_conf->{options};
2569     $raw .= &$format_options($options) if scalar(keys %$options);
2570
2571     my $rules = $hostfw_conf->{rules};
2572     if (scalar(@$rules)) {
2573         $raw .= "[RULES]\n\n";
2574         $raw .= &$format_rules($rules, 1);
2575         $raw .= "\n";
2576     }
2577
2578     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2579 }
2580
2581 sub compile {
2582     my ($cluster_conf, $hostfw_conf) = @_;
2583
2584     $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2585     $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2586
2587     my $vmdata = read_local_vm_config();
2588     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2589
2590     my $routing_table = read_proc_net_route();
2591
2592     my $bridges_config = read_bridges_config();
2593
2594     my $ipset_ruleset = {};
2595     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2596
2597     my $ruleset = {};
2598
2599     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2600     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2601
2602     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2603
2604     my $hostfw_options = $hostfw_conf->{options} || {};
2605
2606     generate_std_chains($ruleset, $hostfw_options);
2607
2608     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2609
2610     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2611
2612     # generate firewall rules for QEMU VMs
2613     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2614         my $conf = $vmdata->{qemu}->{$vmid};
2615         my $vmfw_conf = $vmfw_configs->{$vmid};
2616         next if !$vmfw_conf;
2617         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2618
2619         foreach my $netid (keys %$conf) {
2620             next if $netid !~ m/^net(\d+)$/;
2621             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2622             next if !$net;
2623             my $iface = "tap${vmid}i$1";
2624
2625             my $bridge = $net->{bridge};
2626             next if !$bridge; # fixme: ?
2627
2628             $bridge .= "v$net->{tag}" if $net->{tag};
2629
2630             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2631
2632             my $macaddr = $net->{macaddr};
2633             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2634                                          $vmfw_conf, $vmid, $bridge, 'IN');
2635             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2636                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2637         }
2638     }
2639
2640     # generate firewall rules for OpenVZ containers
2641     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2642         my $conf = $vmdata->{openvz}->{$vmid};
2643
2644         my $vmfw_conf = $vmfw_configs->{$vmid};
2645         next if !$vmfw_conf;
2646         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2647
2648         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2649             my $ip = $conf->{ip_address}->{value};
2650             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2651             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2652         }
2653
2654         if ($conf->{netif} && $conf->{netif}->{value}) {
2655             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2656             foreach my $netid (keys %$netif) {
2657                 my $d = $netif->{$netid};
2658                 my $bridge = $d->{bridge};
2659                 if (!$bridge) {
2660                     warn "no bridge device for CT $vmid iface '$netid'\n";
2661                     next; # fixme?
2662                 }
2663
2664                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2665
2666                 my $macaddr = $d->{mac};
2667                 my $iface = $d->{host_ifname};
2668                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2669                                              $vmfw_conf, $vmid, $bridge, 'IN');
2670                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2671                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2672             }
2673         }
2674     }
2675
2676     if($hostfw_options->{optimize}){
2677
2678         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2679         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2680         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2681     }
2682
2683     # fixme: what log level should we use here?
2684     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2685
2686     # fixme: should we really block inter-bridge traffic?
2687
2688     # always allow traffic from containers?
2689     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2690
2691     # disable interbridge routing
2692     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2693     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2694     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2695     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2696     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2697     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2698
2699     return ($ruleset, $ipset_ruleset);
2700 }
2701
2702 sub get_ruleset_status {
2703     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2704
2705     my $statushash = {};
2706
2707     foreach my $chain (sort keys %$ruleset) {
2708         my $sig = &$digest_fn($ruleset->{$chain});
2709
2710         $statushash->{$chain}->{sig} = $sig;
2711
2712         my $oldsig = $active_chains->{$chain};
2713         if (!defined($oldsig)) {
2714             $statushash->{$chain}->{action} = 'create';
2715         } else {
2716             if ($oldsig eq $sig) {
2717                 $statushash->{$chain}->{action} = 'exists';
2718             } else {
2719                 $statushash->{$chain}->{action} = 'update';
2720             }
2721         }
2722         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2723         foreach my $cmd (@{$ruleset->{$chain}}) {
2724             print "\t$cmd\n" if $verbose;
2725         }
2726     }
2727
2728     foreach my $chain (sort keys %$active_chains) {
2729         if (!defined($ruleset->{$chain})) {
2730             my $sig = $active_chains->{$chain};
2731             $statushash->{$chain}->{action} = 'delete';
2732             $statushash->{$chain}->{sig} = $sig;
2733             print "delete $chain ($sig)\n" if $verbose;
2734         }
2735     }
2736
2737     return $statushash;
2738 }
2739
2740 sub print_sig_rule {
2741     my ($chain, $sig) = @_;
2742
2743     # We just use this to store a SHA1 checksum used to detect changes
2744     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2745 }
2746
2747 sub get_ruleset_cmdlist {
2748     my ($ruleset, $verbose) = @_;
2749
2750     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2751
2752     my ($active_chains, $hooks) = iptables_get_chains();
2753     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2754
2755     # create missing chains first
2756     foreach my $chain (sort keys %$ruleset) {
2757         my $stat = $statushash->{$chain};
2758         die "internal error" if !$stat;
2759         next if $stat->{action} ne 'create';
2760
2761         $cmdlist .= ":$chain - [0:0]\n";
2762     }
2763
2764     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2765         if (!$hooks->{$h}) {
2766             $cmdlist .= "-A $h -j PVEFW-$h\n";
2767         }
2768     }
2769
2770     foreach my $chain (sort keys %$ruleset) {
2771         my $stat = $statushash->{$chain};
2772         die "internal error" if !$stat;
2773
2774         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2775             $cmdlist .= "-F $chain\n";
2776             foreach my $cmd (@{$ruleset->{$chain}}) {
2777                 $cmdlist .= "$cmd\n";
2778             }
2779             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2780         } elsif ($stat->{action} eq 'delete') {
2781             die "internal error"; # this should not happen
2782         } elsif ($stat->{action} eq 'exists') {
2783             # do nothing
2784         } else {
2785             die "internal error - unknown status '$stat->{action}'";
2786         }
2787     }
2788
2789     foreach my $chain (keys %$statushash) {
2790         next if $statushash->{$chain}->{action} ne 'delete';
2791         $cmdlist .= "-F $chain\n";
2792     }
2793     foreach my $chain (keys %$statushash) {
2794         next if $statushash->{$chain}->{action} ne 'delete';
2795         next if $chain eq 'PVEFW-INPUT';
2796         next if $chain eq 'PVEFW-OUTPUT';
2797         next if $chain eq 'PVEFW-FORWARD';
2798         $cmdlist .= "-X $chain\n";
2799     }
2800
2801     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2802
2803     $cmdlist .= "COMMIT\n";
2804
2805     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2806 }
2807
2808 sub get_ipset_cmdlist {
2809     my ($ruleset, $verbose) = @_;
2810
2811     my $cmdlist = "";
2812
2813     my $delete_cmdlist = "";
2814
2815     my $active_chains = ipset_get_chains();
2816     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2817
2818     # remove stale _swap chains
2819     foreach my $chain (keys %$active_chains) {
2820         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2821             $cmdlist .= "destroy $chain\n";
2822         }
2823     }
2824
2825     foreach my $chain (sort keys %$ruleset) {
2826         my $stat = $statushash->{$chain};
2827         die "internal error" if !$stat;
2828
2829         if ($stat->{action} eq 'create') {
2830             foreach my $cmd (@{$ruleset->{$chain}}) {
2831                 $cmdlist .= "$cmd\n";
2832             }
2833         }
2834
2835         if ($stat->{action} eq 'update') {
2836             my $chain_swap = $chain."_swap";
2837
2838             foreach my $cmd (@{$ruleset->{$chain}}) {
2839                 $cmd =~ s/$chain/$chain_swap/;
2840                 $cmdlist .= "$cmd\n";
2841             }
2842             $cmdlist .= "swap $chain_swap $chain\n";
2843             $cmdlist .= "flush $chain_swap\n";
2844             $cmdlist .= "destroy $chain_swap\n";
2845         }
2846
2847     }
2848
2849     foreach my $chain (keys %$statushash) {
2850         next if $statushash->{$chain}->{action} ne 'delete';
2851
2852         $delete_cmdlist .= "flush $chain\n";
2853         $delete_cmdlist .= "destroy $chain\n";
2854     }
2855
2856     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2857
2858     return ($cmdlist, $delete_cmdlist, $changes);
2859 }
2860
2861 sub apply_ruleset {
2862     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2863
2864     enable_bridge_firewall();
2865
2866     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2867         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2868
2869     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2870
2871     if ($verbose) {
2872         if ($ipset_changes) {
2873             print "ipset changes:\n";
2874             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2875             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2876         }
2877
2878         if ($changes) {
2879             print "iptables changes:\n";
2880             print $cmdlist;
2881         }
2882     }
2883
2884     ipset_restore_cmdlist($ipset_create_cmdlist);
2885
2886     iptables_restore_cmdlist($cmdlist);
2887
2888     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2889
2890     # test: re-read status and check if everything is up to date
2891     my $active_chains = iptables_get_chains();
2892     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2893
2894     my $errors;
2895     foreach my $chain (sort keys %$ruleset) {
2896         my $stat = $statushash->{$chain};
2897         if ($stat->{action} ne 'exists') {
2898             warn "unable to update chain '$chain'\n";
2899             $errors = 1;
2900         }
2901     }
2902
2903     die "unable to apply firewall changes\n" if $errors;
2904
2905     update_nf_conntrack_max($hostfw_conf);
2906
2907     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2908
2909 }
2910
2911 sub update_nf_conntrack_max {
2912     my ($hostfw_conf) = @_;
2913
2914     my $max = 65536; # reasonable default
2915
2916     my $options = $hostfw_conf->{options} || {};
2917
2918     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2919         $max = $options->{nf_conntrack_max};
2920         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2921     }
2922
2923     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2924     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2925
2926     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2927
2928     if ($current != $max) {
2929         my $hashsize = int($max/4);
2930         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2931         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2932     }
2933 }
2934
2935 sub update_nf_conntrack_tcp_timeout_established {
2936     my ($hostfw_conf) = @_;
2937
2938     my $options = $hostfw_conf->{options} || {};
2939
2940     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2941
2942     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2943 }
2944
2945 sub remove_pvefw_chains {
2946
2947     my ($chash, $hooks) = iptables_get_chains();
2948     my $cmdlist = "*filter\n";
2949
2950     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2951         if ($hooks->{$h}) {
2952             $cmdlist .= "-D $h -j PVEFW-$h\n";
2953         }
2954     }
2955
2956     foreach my $chain (keys %$chash) {
2957         $cmdlist .= "-F $chain\n";
2958     }
2959
2960     foreach my $chain (keys %$chash) {
2961         $cmdlist .= "-X $chain\n";
2962     }
2963     $cmdlist .= "COMMIT\n";
2964
2965     iptables_restore_cmdlist($cmdlist);
2966 }
2967
2968 sub update {
2969     my ($start, $verbose) = @_;
2970
2971     my $code = sub {
2972
2973         my $cluster_conf = load_clusterfw_conf();
2974         my $cluster_options = $cluster_conf->{options};
2975
2976         my $enable = $cluster_options->{enable};
2977
2978         my $status = read_pvefw_status();
2979
2980         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2981
2982         if (!$enable) {
2983             PVE::Firewall::remove_pvefw_chains();
2984             print "Firewall disabled\n" if $verbose;
2985             return;
2986         }
2987
2988         my $hostfw_conf = load_hostfw_conf();
2989
2990         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2991
2992         if ($start || $status eq 'active') {
2993
2994             save_pvefw_status('active') if ($status ne 'active');
2995
2996             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2997         } else {
2998             print "Firewall not active (status = $status)\n" if $verbose;
2999         }
3000     };
3001
3002     run_locked($code);
3003 }
3004
3005
3006 1;