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     # update all or nothing
1313
1314     my @cmds = ();
1315     foreach my $tmp (@$rules) {
1316         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1317             push @cmds, $cmdstr;
1318         }
1319     }
1320
1321     foreach my $cmdstr (@cmds) {
1322         ruleset_addrule($ruleset, $chain, $cmdstr);
1323     }
1324 }
1325
1326 sub ruleset_generate_rule_insert {
1327     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1328
1329     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1330
1331     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1332         ruleset_insertrule($ruleset, $chain, $cmdstr);
1333     }
1334 }
1335
1336 sub ruleset_create_chain {
1337     my ($ruleset, $chain) = @_;
1338
1339     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1340     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1341
1342     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1343
1344     $ruleset->{$chain} = [];
1345 }
1346
1347 sub ruleset_chain_exist {
1348     my ($ruleset, $chain) = @_;
1349
1350     return $ruleset->{$chain} ? 1 : undef;
1351 }
1352
1353 sub ruleset_addrule {
1354    my ($ruleset, $chain, $rule) = @_;
1355
1356    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1357
1358    push @{$ruleset->{$chain}}, "-A $chain $rule";
1359 }
1360
1361 sub ruleset_insertrule {
1362    my ($ruleset, $chain, $rule) = @_;
1363
1364    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1365
1366    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1367 }
1368
1369 sub get_log_rule_base {
1370     my ($chain, $vmid, $msg, $loglevel) = @_;
1371
1372     die "internal error - no log level" if !defined($loglevel);
1373
1374     $vmid = 0 if !defined($vmid);
1375
1376     # Note: we use special format for prefix to pass further
1377     # info to log daemon (VMID, LOGVELEL and CHAIN)
1378
1379     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1380 }
1381
1382 sub ruleset_addlog {
1383     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1384
1385     return if !defined($loglevel);
1386
1387     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1388
1389     $logrule = "$rule $logrule" if defined($rule);
1390
1391     ruleset_addrule($ruleset, $chain, $logrule)
1392 }
1393
1394 sub generate_bridge_chains {
1395     my ($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config) = @_;
1396
1397     my $options = $hostfw_conf->{options} || {};
1398
1399     die "error: detected direct route to bridge '$bridge'\n"
1400         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1401
1402     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1403         ruleset_create_chain($ruleset, "$bridge-FW");
1404         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1405         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1406     }
1407
1408     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1409         ruleset_create_chain($ruleset, "$bridge-OUT");
1410
1411         if($options->{optimize}){
1412             foreach my $interface (@{$bridges_config->{$bridge}}) {
1413                 ruleset_addrule($ruleset, "$bridge-OUT", "-m physdev --physdev-is-bridged --physdev-in $interface -g PVEFW-SET-ACCEPT-MARK");
1414             }
1415         }
1416
1417         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1418         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1419     }
1420
1421     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1422         ruleset_create_chain($ruleset, "$bridge-IN");
1423
1424         if($options->{optimize}){
1425             foreach my $interface (@{$bridges_config->{$bridge}}) {
1426                 ruleset_addrule($ruleset, "$bridge-IN", "-m physdev --physdev-is-bridged --physdev-out $interface -j ACCEPT");
1427             }
1428         }
1429
1430         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1431         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1432         # accept traffic to unmanaged bridge ports
1433         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1434     }
1435 }
1436
1437 sub ruleset_add_chain_policy {
1438     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1439
1440     if ($policy eq 'ACCEPT') {
1441
1442         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1443                               { ACCEPT =>  $accept_action});
1444
1445     } elsif ($policy eq 'DROP') {
1446
1447         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1448
1449         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1450
1451         ruleset_addrule($ruleset, $chain, "-j DROP");
1452     } elsif ($policy eq 'REJECT') {
1453         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1454
1455         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1456
1457         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1458     } else {
1459         # should not happen
1460         die "internal error: unknown policy '$policy'";
1461     }
1462 }
1463
1464 sub ruleset_create_vm_chain {
1465     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1466
1467     ruleset_create_chain($ruleset, $chain);
1468     my $accept = generate_nfqueue($options);
1469
1470     if (!(defined($host_options->{nosmurfs}) && $host_options->{nosmurfs} == 0)) {
1471         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1472     }
1473
1474     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1475         if ($direction eq 'OUT') {
1476             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1477                                                       proto => 'udp', sport => 68, dport => 67 });
1478         } else {
1479             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1480                                                       proto => 'udp', sport => 67, dport => 68 });
1481         }
1482     }
1483
1484     if ($host_options->{tcpflags}) {
1485         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1486     }
1487
1488     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1489     if ($direction eq 'OUT') {
1490         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1491     } else {
1492         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1493     }
1494
1495     if ($direction eq 'OUT') {
1496         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1497             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1498         }
1499         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1500     }
1501 }
1502
1503 sub ruleset_generate_vm_rules {
1504     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1505
1506     my $lc_direction = lc($direction);
1507
1508     foreach my $rule (@$rules) {
1509         next if $rule->{iface} && $rule->{iface} ne $netid;
1510         next if !$rule->{enable};
1511         if ($rule->{type} eq 'group') {
1512             my $group_chain = "GROUP-$rule->{action}-$direction";
1513             if(!ruleset_chain_exist($ruleset, $group_chain)){
1514                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1515             }
1516             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1517             if ($direction eq 'OUT'){
1518                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1519             }else{
1520                 my $accept = generate_nfqueue($options);
1521                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1522             }
1523
1524         } else {
1525             next if $rule->{type} ne $lc_direction;
1526             if ($direction eq 'OUT') {
1527                 ruleset_generate_rule($ruleset, $chain, $rule,
1528                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1529             } else {
1530                 my $accept = generate_nfqueue($options);
1531                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1532             }
1533         }
1534     }
1535 }
1536
1537 sub generate_nfqueue {
1538     my ($options) = @_;
1539
1540     if ($options->{ips}) {
1541         my $action = "NFQUEUE";
1542         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1543             if (defined($3) && defined($1)) {
1544                 $action .= " --queue-balance $1:$3";
1545             } elsif (defined($1)) {
1546                 $action .= " --queue-num $1";
1547             }
1548         }
1549         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1550         return $action;
1551     } else {
1552         return "ACCEPT";
1553     }
1554 }
1555
1556 sub ruleset_generate_vm_ipsrules {
1557     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1558
1559     if ($options->{ips} && $direction eq 'IN') {
1560         my $nfqueue = generate_nfqueue($options);
1561
1562         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1563             ruleset_create_chain($ruleset, "PVEFW-IPS");
1564         }
1565
1566         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1567             ruleset_create_chain($ruleset, "$bridge-IPS");
1568             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1569         }
1570
1571         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1572     }
1573 }
1574
1575 sub generate_venet_rules_direction {
1576     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1577
1578     parse_address_list($ip); # make sure we have a valid $ip list
1579
1580     my $lc_direction = lc($direction);
1581
1582     my $rules = $vmfw_conf->{rules};
1583
1584     my $options = $vmfw_conf->{options};
1585     my $hostfw_options = $vmfw_conf->{options};
1586     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1587
1588     my $chain = "venet0-$vmid-$direction";
1589
1590     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1591
1592     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1593
1594     # implement policy
1595     my $policy;
1596
1597     if ($direction eq 'OUT') {
1598         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1599     } else {
1600         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1601     }
1602
1603     my $accept = generate_nfqueue($options);
1604     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1605     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1606
1607     # plug into FORWARD, INPUT and OUTPUT chain
1608     if ($direction eq 'OUT') {
1609         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1610             action => $chain,
1611             source => $ip,
1612             iface_in => 'venet0'});
1613
1614         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1615             action => $chain,
1616             source => $ip,
1617             iface_in => 'venet0'});
1618     } else {
1619         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1620             action => $chain,
1621             dest => $ip,
1622             iface_out => 'venet0'});
1623
1624         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1625             action => $chain,
1626             dest => $ip,
1627             iface_out => 'venet0'});
1628     }
1629 }
1630
1631 sub generate_tap_rules_direction {
1632     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1633
1634     my $lc_direction = lc($direction);
1635
1636     my $rules = $vmfw_conf->{rules};
1637
1638     my $options = $vmfw_conf->{options};
1639     my $hostfw_options = $hostfw_conf->{options};
1640     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1641
1642     my $tapchain = "$iface-$direction";
1643
1644     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1645
1646     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1647
1648     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1649
1650     # implement policy
1651     my $policy;
1652
1653     if ($direction eq 'OUT') {
1654         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1655     } else {
1656         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1657     }
1658
1659     my $accept = generate_nfqueue($options);
1660     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1661     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1662
1663     # plug the tap chain to bridge chain
1664     if ($direction eq 'IN') {
1665         ruleset_addrule($ruleset, "$bridge-IN",
1666                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1667     } else {
1668         ruleset_addrule($ruleset, "$bridge-OUT",
1669                            "-m physdev --physdev-in $iface -j $tapchain");
1670     }
1671 }
1672
1673 sub enable_host_firewall {
1674     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1675
1676     my $options = $hostfw_conf->{options};
1677     my $cluster_options = $cluster_conf->{options};
1678     my $rules = $hostfw_conf->{rules};
1679     my $cluster_rules = $cluster_conf->{rules};
1680
1681     # host inbound firewall
1682     my $chain = "PVEFW-HOST-IN";
1683     ruleset_create_chain($ruleset, $chain);
1684
1685     my $loglevel = get_option_log_level($options, "log_level_in");
1686
1687     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1688         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1689     }
1690
1691     if ($options->{tcpflags}) {
1692         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1693     }
1694
1695     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1696     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1697     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1698     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1699     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1700     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1701
1702     # we use RETURN because we need to check also tap rules
1703     my $accept_action = 'RETURN';
1704
1705     # add host rules first, so that cluster wide rules can be overwritten
1706     foreach my $rule (@$rules, @$cluster_rules) {
1707         next if $rule->{type} ne 'in';
1708         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1709     }
1710
1711     # implement input policy
1712     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1713     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1714
1715     # host outbound firewall
1716     $chain = "PVEFW-HOST-OUT";
1717     ruleset_create_chain($ruleset, $chain);
1718
1719     $loglevel = get_option_log_level($options, "log_level_out");
1720
1721     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1722     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1723     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1724     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1725     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1726     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1727
1728     # we use RETURN because we may want to check other thigs later
1729     $accept_action = 'RETURN';
1730
1731     # add host rules first, so that cluster wide rules can be overwritten
1732     foreach my $rule (@$rules, @$cluster_rules) {
1733         next if $rule->{type} ne 'out';
1734         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1735     }
1736
1737     # implement output policy
1738     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1739     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1740
1741     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1742     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1743 }
1744
1745 sub generate_group_rules {
1746     my ($ruleset, $cluster_conf, $group) = @_;
1747     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1748
1749     my $rules = $cluster_conf->{groups}->{$group};
1750
1751     my $chain = "GROUP-${group}-IN";
1752
1753     ruleset_create_chain($ruleset, $chain);
1754     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1755
1756     foreach my $rule (@$rules) {
1757         next if $rule->{type} ne 'in';
1758         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1759     }
1760
1761     $chain = "GROUP-${group}-OUT";
1762
1763     ruleset_create_chain($ruleset, $chain);
1764     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1765
1766     foreach my $rule (@$rules) {
1767         next if $rule->{type} ne 'out';
1768         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1769         # check also other tap rules later
1770         ruleset_generate_rule($ruleset, $chain, $rule,
1771                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1772     }
1773 }
1774
1775 my $MAX_NETS = 32;
1776 my $valid_netdev_names = {};
1777 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1778     $valid_netdev_names->{"net$i"} = 1;
1779 }
1780
1781 sub parse_fw_rule {
1782     my ($line, $need_iface, $allow_groups) = @_;
1783
1784     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1785
1786     # we can add single line comments to the end of the rule
1787     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1788
1789     # we can disable a rule when prefixed with '|'
1790     my $enable = 1;
1791
1792     $enable = 0 if $line =~ s/^\|//;
1793
1794     my @data = split(/\s+/, $line);
1795     my $expected_elements = $need_iface ? 8 : 7;
1796
1797     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1798
1799     if ($need_iface) {
1800         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1801     } else {
1802         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1803     }
1804
1805     die "incomplete rule\n" if ! ($type && $action);
1806
1807     my $macro;
1808
1809     $type = lc($type);
1810
1811     if ($type eq  'in' || $type eq 'out') {
1812         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1813             # OK
1814         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1815             $action = $2;
1816             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1817             die "unknown macro '$1'\n" if !$preferred_name;
1818             $macro = $preferred_name;
1819         } else {
1820             die "unknown action '$action'\n";
1821         }
1822     } elsif ($type eq 'group') {
1823         die "wrong number of rule elements\n" if scalar(@data) != 3;
1824         die "groups disabled\n" if !$allow_groups;
1825
1826         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1827     } else {
1828         die "unknown rule type '$type'\n";
1829     }
1830
1831     if ($need_iface) {
1832         $iface = undef if $iface && $iface eq '-';
1833     }
1834
1835     $proto = undef if $proto && $proto eq '-';
1836     pve_fw_verify_protocol_spec($proto) if $proto;
1837
1838     $source = undef if $source && $source eq '-';
1839     $dest = undef if $dest && $dest eq '-';
1840
1841     $dport = undef if $dport && $dport eq '-';
1842     $sport = undef if $sport && $sport eq '-';
1843
1844     parse_port_name_number_or_range($dport) if defined($dport);
1845     parse_port_name_number_or_range($sport) if defined($sport);
1846
1847     parse_address_list($source) if $source;
1848     parse_address_list($dest) if $dest;
1849
1850     return {
1851         type => $type,
1852         enable => $enable,
1853         comment => $comment,
1854         action => $action,
1855         macro => $macro,
1856         iface => $iface,
1857         source => $source,
1858         dest => $dest,
1859         proto => $proto,
1860         dport => $dport,
1861         sport => $sport,
1862     };
1863 }
1864
1865 sub parse_vmfw_option {
1866     my ($line) = @_;
1867
1868     my ($opt, $value);
1869
1870     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1871
1872     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1873         $opt = lc($1);
1874         $value = int($2);
1875     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1876         $opt = lc($1);
1877         $value = $2 ? lc($3) : '';
1878     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1879         $opt = lc($1);
1880         $value = uc($3);
1881     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1882         $opt = lc($1);
1883         $value = $2;
1884     } else {
1885         chomp $line;
1886         die "can't parse option '$line'\n"
1887     }
1888
1889     return ($opt, $value);
1890 }
1891
1892 sub parse_hostfw_option {
1893     my ($line) = @_;
1894
1895     my ($opt, $value);
1896
1897     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1898
1899     if ($line =~ m/^(enable|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1900         $opt = lc($1);
1901         $value = int($2);
1902     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1903         $opt = lc($1);
1904         $value = $2 ? lc($3) : '';
1905     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1906         $opt = lc($1);
1907         $value = int($2);
1908     } else {
1909         chomp $line;
1910         die "can't parse option '$line'\n"
1911     }
1912
1913     return ($opt, $value);
1914 }
1915
1916 sub parse_clusterfw_option {
1917     my ($line) = @_;
1918
1919     my ($opt, $value);
1920
1921     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1922         $opt = lc($1);
1923         $value = int($2);
1924     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1925         $opt = lc($1);
1926         $value = uc($3);
1927     } else {
1928         chomp $line;
1929         die "can't parse option '$line'\n"
1930     }
1931
1932     return ($opt, $value);
1933 }
1934
1935 sub parse_clusterfw_alias {
1936     my ($line) = @_;
1937
1938     my ($opt, $value);
1939     if ($line =~ m/^(\S+)\s(\S+)$/) {
1940         $opt = lc($1);
1941         if($2){
1942             $2 =~ s|/32$||;
1943             pve_verify_ipv4_or_cidr($2) if $2;
1944             $value = $2;
1945         }
1946     } else {
1947         chomp $line;
1948         die "can't parse option '$line'\n";
1949     }
1950
1951     return ($opt, $value);
1952 }
1953
1954 sub parse_vm_fw_rules {
1955     my ($filename, $fh) = @_;
1956
1957     my $res = { rules => [], options => {}};
1958
1959     my $section;
1960
1961     while (defined(my $line = <$fh>)) {
1962         next if $line =~ m/^#/;
1963         next if $line =~ m/^\s*$/;
1964
1965         my $linenr = $fh->input_line_number();
1966         my $prefix = "$filename (line $linenr)";
1967
1968         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1969             $section = lc($1);
1970             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1971             next;
1972         }
1973         if (!$section) {
1974             warn "$prefix: skip line - no section";
1975             next;
1976         }
1977
1978         next if !$res->{$section}; # skip undefined section
1979
1980         if ($section eq 'options') {
1981             eval {
1982                 my ($opt, $value) = parse_vmfw_option($line);
1983                 $res->{options}->{$opt} = $value;
1984             };
1985             warn "$prefix: $@" if $@;
1986             next;
1987         }
1988
1989         my $rule;
1990         eval { $rule = parse_fw_rule($line, 1, 1); };
1991         if (my $err = $@) {
1992             warn "$prefix: $err";
1993             next;
1994         }
1995
1996         push @{$res->{$section}}, $rule;
1997     }
1998
1999     return $res;
2000 }
2001
2002 sub parse_host_fw_rules {
2003     my ($filename, $fh) = @_;
2004
2005     my $res = { rules => [], options => {}};
2006
2007     my $section;
2008
2009     while (defined(my $line = <$fh>)) {
2010         next if $line =~ m/^#/;
2011         next if $line =~ m/^\s*$/;
2012
2013         my $linenr = $fh->input_line_number();
2014         my $prefix = "$filename (line $linenr)";
2015
2016         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2017             $section = lc($1);
2018             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2019             next;
2020         }
2021         if (!$section) {
2022             warn "$prefix: skip line - no section";
2023             next;
2024         }
2025
2026         next if !$res->{$section}; # skip undefined section
2027
2028         if ($section eq 'options') {
2029             eval {
2030                 my ($opt, $value) = parse_hostfw_option($line);
2031                 $res->{options}->{$opt} = $value;
2032             };
2033             warn "$prefix: $@" if $@;
2034             next;
2035         }
2036
2037         my $rule;
2038         eval { $rule = parse_fw_rule($line, 1, 1); };
2039         if (my $err = $@) {
2040             warn "$prefix: $err";
2041             next;
2042         }
2043
2044         push @{$res->{$section}}, $rule;
2045     }
2046
2047     return $res;
2048 }
2049
2050 sub parse_cluster_fw_rules {
2051     my ($filename, $fh) = @_;
2052
2053     my $section;
2054     my $group;
2055
2056     my $res = {
2057         rules => [],
2058         options => {},
2059         groups => {},
2060         group_comments => {},
2061         ipset => {} ,
2062         ipset_comments => {},
2063     };
2064
2065     while (defined(my $line = <$fh>)) {
2066         next if $line =~ m/^#/;
2067         next if $line =~ m/^\s*$/;
2068
2069         my $linenr = $fh->input_line_number();
2070         my $prefix = "$filename (line $linenr)";
2071
2072         if ($line =~ m/^\[options\]$/i) {
2073             $section = 'options';
2074             next;
2075         }
2076
2077         if ($line =~ m/^\[aliases\]$/i) {
2078             $section = 'aliases';
2079             next;
2080         }
2081
2082         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2083             $section = 'groups';
2084             $group = lc($1);
2085             my $comment = $2;
2086             $res->{$section}->{$group} = [];
2087             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2088                 if $comment;
2089             next;
2090         }
2091
2092         if ($line =~ m/^\[rules\]$/i) {
2093             $section = 'rules';
2094             next;
2095         }
2096
2097         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2098             $section = 'ipset';
2099             $group = lc($1);
2100             my $comment = $2;
2101             $res->{$section}->{$group} = [];
2102             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2103                 if $comment;
2104             next;
2105         }
2106
2107         if (!$section) {
2108             warn "$prefix: skip line - no section\n";
2109             next;
2110         }
2111
2112         if ($section eq 'options') {
2113             eval {
2114                 my ($opt, $value) = parse_clusterfw_option($line);
2115                 $res->{options}->{$opt} = $value;
2116             };
2117             warn "$prefix: $@" if $@;
2118         } elsif ($section eq 'aliases') {
2119             eval {
2120                 my ($opt, $value) = parse_clusterfw_alias($line);
2121                 $res->{aliases}->{$opt} = $value;
2122             };
2123             warn "$prefix: $@" if $@;
2124         } elsif ($section eq 'rules') {
2125             my $rule;
2126             eval { $rule = parse_fw_rule($line, 1, 1); };
2127             if (my $err = $@) {
2128                 warn "$prefix: $err";
2129                 next;
2130             }
2131             push @{$res->{$section}}, $rule;
2132         } elsif ($section eq 'groups') {
2133             my $rule;
2134             eval { $rule = parse_fw_rule($line, 0, 0); };
2135             if (my $err = $@) {
2136                 warn "$prefix: $err";
2137                 next;
2138             }
2139             push @{$res->{$section}->{$group}}, $rule;
2140         } elsif ($section eq 'ipset') {
2141             # we can add single line comments to the end of the rule
2142             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2143
2144             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2145             my $nomatch = $1;
2146             my $cidr = $2;
2147
2148             if($cidr !~ m/^${ip_alias_pattern}$/) {
2149                 $cidr =~ s|/32$||;
2150
2151                 eval { pve_verify_ipv4_or_cidr($cidr); };
2152                 if (my $err = $@) {
2153                     warn "$prefix: $cidr - $err";
2154                     next;
2155                 }
2156             }
2157
2158             my $entry = { cidr => $cidr };
2159             $entry->{nomatch} = 1 if $nomatch;
2160             $entry->{comment} = $comment if $comment;
2161
2162             push @{$res->{$section}->{$group}}, $entry;
2163         }
2164     }
2165
2166     return $res;
2167 }
2168
2169 sub run_locked {
2170     my ($code, @param) = @_;
2171
2172     my $timeout = 10;
2173
2174     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2175
2176     die $@ if $@;
2177
2178     return $res;
2179 }
2180
2181 sub read_local_vm_config {
2182
2183     my $openvz = {};
2184     my $qemu = {};
2185
2186     my $vmdata = { openvz => $openvz, qemu => $qemu };
2187
2188     my $vmlist = PVE::Cluster::get_vmlist();
2189     return $vmdata if !$vmlist || !$vmlist->{ids};
2190     my $ids = $vmlist->{ids};
2191
2192     foreach my $vmid (keys %$ids) {
2193         next if !$vmid; # skip VE0
2194         my $d = $ids->{$vmid};
2195         next if !$d->{node} || $d->{node} ne $nodename;
2196         next if !$d->{type};
2197         if ($d->{type} eq 'openvz') {
2198             if ($have_pve_manager) {
2199                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2200                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2201                     $openvz->{$vmid} = $conf;
2202                 }
2203             }
2204         } elsif ($d->{type} eq 'qemu') {
2205             if ($have_qemu_server) {
2206                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2207                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2208                     $qemu->{$vmid} = $conf;
2209                 }
2210             }
2211         }
2212     }
2213
2214     return $vmdata;
2215 };
2216
2217 sub read_bridges_config {
2218
2219     my $bridgehash = {};
2220
2221     dir_glob_foreach('/sys/class/net', 'vmbr(\d+)', sub {
2222         my ($bridge) = @_;
2223
2224         dir_glob_foreach("/sys/class/net/$bridge/brif", '((eth|bond)(\d+)(\.(\d+))?)', sub {
2225             my ($interface) = @_;
2226             push @{$bridgehash->{$bridge}}, $interface;
2227         });
2228     });
2229
2230     return $bridgehash;
2231 };
2232
2233 sub load_vmfw_conf {
2234     my ($vmid) = @_;
2235
2236     my $vmfw_conf = {};
2237
2238     my $filename = "/etc/pve/firewall/$vmid.fw";
2239     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2240         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2241     }
2242
2243     return $vmfw_conf;
2244 }
2245
2246 my $format_rules = sub {
2247     my ($rules, $need_iface) = @_;
2248
2249     my $raw = '';
2250
2251     foreach my $rule (@$rules) {
2252         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2253             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2254             $raw .= uc($rule->{type});
2255             if ($rule->{macro}) {
2256                 $raw .= " $rule->{macro}($rule->{action})";
2257             } else {
2258                 $raw .= " " . $rule->{action};
2259             }
2260             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2261
2262             if ($rule->{type} ne  'group')  {
2263                 $raw .= " " . ($rule->{source} || '-');
2264                 $raw .= " " . ($rule->{dest} || '-');
2265                 $raw .= " " . ($rule->{proto} || '-');
2266                 $raw .= " " . ($rule->{dport} || '-');
2267                 $raw .= " " . ($rule->{sport} || '-');
2268             }
2269
2270             $raw .= " # " . encode('utf8', $rule->{comment})
2271                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2272             $raw .= "\n";
2273         } else {
2274             die "unknown rule type '$rule->{type}'";
2275         }
2276     }
2277
2278     return $raw;
2279 };
2280
2281 my $format_options = sub {
2282     my ($options) = @_;
2283
2284     my $raw = '';
2285
2286     $raw .= "[OPTIONS]\n\n";
2287     foreach my $opt (keys %$options) {
2288         $raw .= "$opt: $options->{$opt}\n";
2289     }
2290     $raw .= "\n";
2291
2292     return $raw;
2293 };
2294
2295 my $format_ipset = sub {
2296     my ($options) = @_;
2297
2298     my $raw = '';
2299
2300     my $nethash = {};
2301     foreach my $entry (@$options) {
2302         $nethash->{$entry->{cidr}} = $entry;
2303     }
2304
2305     foreach my $cidr (sort keys %$nethash) {
2306         my $entry = $nethash->{$cidr};
2307         my $line = $entry->{nomatch} ? '!' : '';
2308         $line .= $entry->{cidr};
2309         $line .= " # " . encode('utf8', $entry->{comment})
2310             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2311         $raw .= "$line\n";
2312     }
2313
2314     return $raw;
2315 };
2316
2317 sub save_vmfw_conf {
2318     my ($vmid, $vmfw_conf) = @_;
2319
2320     my $raw = '';
2321
2322     my $options = $vmfw_conf->{options};
2323     $raw .= &$format_options($options) if scalar(keys %$options);
2324
2325     my $rules = $vmfw_conf->{rules};
2326     if (scalar(@$rules)) {
2327         $raw .= "[RULES]\n\n";
2328         $raw .= &$format_rules($rules, 1);
2329         $raw .= "\n";
2330     }
2331
2332     my $filename = "/etc/pve/firewall/$vmid.fw";
2333     PVE::Tools::file_set_contents($filename, $raw);
2334 }
2335
2336 sub read_vm_firewall_configs {
2337     my ($vmdata) = @_;
2338     my $vmfw_configs = {};
2339
2340     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2341         my $vmfw_conf = load_vmfw_conf($vmid);
2342         next if !$vmfw_conf->{options}; # skip if file does not exists
2343         $vmfw_configs->{$vmid} = $vmfw_conf;
2344     }
2345
2346     return $vmfw_configs;
2347 }
2348
2349 sub get_option_log_level {
2350     my ($options, $k) = @_;
2351
2352     my $v = $options->{$k};
2353     $v = $default_log_level if !defined($v);
2354
2355     return undef if $v eq '' || $v eq 'nolog';
2356
2357     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2358
2359     return $v if ($v >= 0) && ($v <= 7);
2360
2361     warn "unknown log level ($k = '$v')\n";
2362
2363     return undef;
2364 }
2365
2366 sub generate_std_chains {
2367     my ($ruleset, $options) = @_;
2368
2369     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2370
2371     # same as shorewall smurflog.
2372     my $chain = 'PVEFW-smurflog';
2373     $pve_std_chains->{$chain} = [];
2374
2375     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2376     push @{$pve_std_chains->{$chain}}, "-j DROP";
2377
2378     # same as shorewall logflags action.
2379     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2380     $chain = 'PVEFW-logflags';
2381     $pve_std_chains->{$chain} = [];
2382
2383     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2384     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2385     push @{$pve_std_chains->{$chain}}, "-j DROP";
2386
2387     foreach my $chain (keys %$pve_std_chains) {
2388         ruleset_create_chain($ruleset, $chain);
2389         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2390             if (ref($rule)) {
2391                 ruleset_generate_rule($ruleset, $chain, $rule);
2392             } else {
2393                 ruleset_addrule($ruleset, $chain, $rule);
2394             }
2395         }
2396     }
2397 }
2398
2399 sub generate_ipset_chains {
2400     my ($ipset_ruleset, $fw_conf) = @_;
2401
2402     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2403         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2404     }
2405 }
2406
2407 sub generate_ipset {
2408     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2409
2410     my $hashsize = scalar(@$options);
2411     if ($hashsize <= 64) {
2412         $hashsize = 64;
2413     } else {
2414         $hashsize = round_powerof2($hashsize);
2415     }
2416
2417     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2418
2419     # remove duplicates
2420     my $nethash = {};
2421     foreach my $entry (@$options) {
2422         my $cidr = $entry->{cidr};
2423         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2424             if ($aliases->{$cidr}) {
2425                 $entry->{cidr} = $aliases->{$cidr};
2426             } else {
2427                 warn "no such alias '$cidr'\n" if !$aliases->{$cidr};
2428             }
2429         }
2430         $nethash->{$entry->{cidr}} = $entry;
2431     }
2432
2433     foreach my $cidr (sort keys %$nethash) {
2434         my $entry = $nethash->{$cidr};
2435
2436         my $cmd = "add $name $cidr";
2437         if ($entry->{nomatch}) {
2438             if ($feature_ipset_nomatch) {
2439                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2440             } else {
2441                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2442             }
2443         } else {
2444             push @{$ipset_ruleset->{$name}}, $cmd;
2445         }
2446     }
2447 }
2448
2449 sub round_powerof2 {
2450     my ($int) = @_;
2451
2452     $int--;
2453     $int |= $int >> $_ foreach (1,2,4,8,16);
2454     return ++$int;
2455 }
2456
2457 sub save_pvefw_status {
2458     my ($status) = @_;
2459
2460     die "unknown status '$status' - internal error"
2461         if $status !~ m/^(stopped|active)$/;
2462
2463     mkdir dirname($pve_fw_status_filename);
2464     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2465 }
2466
2467 sub read_pvefw_status {
2468
2469     my $status = 'unknown';
2470
2471     return 'stopped' if ! -f $pve_fw_status_filename;
2472
2473     eval {
2474         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2475     };
2476     warn $@ if $@;
2477
2478     return $status;
2479 }
2480
2481 # fixme: move to pve-common PVE::ProcFSTools
2482 sub read_proc_net_route {
2483     my $filename = "/proc/net/route";
2484
2485     my $res = {};
2486
2487     my $fh = IO::File->new ($filename, "r");
2488     return $res if !$fh;
2489
2490     my $int_to_quad = sub {
2491         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2492     };
2493
2494     while (defined(my $line = <$fh>)) {
2495         next if $line =~/^Iface\s+Destination/; # skip head
2496         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2497         push @{$res->{$iface}}, {
2498             dest => &$int_to_quad(hex($dest)),
2499             gateway => &$int_to_quad(hex($gateway)),
2500             mask => &$int_to_quad(hex($mask)),
2501             metric => $metric,
2502             mtu => $mtu,
2503         };
2504     }
2505
2506     return $res;
2507 }
2508
2509 sub load_clusterfw_conf {
2510
2511     my $cluster_conf = {};
2512      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2513         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2514     }
2515
2516     return $cluster_conf;
2517 }
2518
2519 sub save_clusterfw_conf {
2520     my ($cluster_conf) = @_;
2521
2522     my $raw = '';
2523
2524     my $options = $cluster_conf->{options};
2525     $raw .= &$format_options($options) if scalar(keys %$options);
2526
2527     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2528         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2529             my $utf8comment = encode('utf8', $comment);
2530             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2531         } else {
2532             $raw .= "[IPSET $ipset]\n\n";
2533         }
2534         my $options = $cluster_conf->{ipset}->{$ipset};
2535         $raw .= &$format_ipset($options);
2536         $raw .= "\n";
2537     }
2538
2539     my $rules = $cluster_conf->{rules};
2540     if (scalar(@$rules)) {
2541         $raw .= "[RULES]\n\n";
2542         $raw .= &$format_rules($rules, 1);
2543         $raw .= "\n";
2544     }
2545
2546     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2547         my $rules = $cluster_conf->{groups}->{$group};
2548         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2549             my $utf8comment = encode('utf8', $comment);
2550             $raw .= "[group $group] # $utf8comment\n\n";
2551         } else {
2552             $raw .= "[group $group]\n\n";
2553         }
2554
2555         $raw .= &$format_rules($rules, 0);
2556         $raw .= "\n";
2557     }
2558
2559     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2560 }
2561
2562 sub load_hostfw_conf {
2563
2564     my $hostfw_conf = {};
2565     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2566         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2567     }
2568     return $hostfw_conf;
2569 }
2570
2571 sub save_hostfw_conf {
2572     my ($hostfw_conf) = @_;
2573
2574     my $raw = '';
2575
2576     my $options = $hostfw_conf->{options};
2577     $raw .= &$format_options($options) if scalar(keys %$options);
2578
2579     my $rules = $hostfw_conf->{rules};
2580     if (scalar(@$rules)) {
2581         $raw .= "[RULES]\n\n";
2582         $raw .= &$format_rules($rules, 1);
2583         $raw .= "\n";
2584     }
2585
2586     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2587 }
2588
2589 sub compile {
2590     my ($cluster_conf, $hostfw_conf) = @_;
2591
2592     $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2593     $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2594
2595     my $vmdata = read_local_vm_config();
2596     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2597
2598     my $routing_table = read_proc_net_route();
2599
2600     my $bridges_config = read_bridges_config();
2601
2602     my $ipset_ruleset = {};
2603     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2604
2605     my $ruleset = {};
2606
2607     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2608     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2609
2610     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2611
2612     my $hostfw_options = $hostfw_conf->{options} || {};
2613
2614     generate_std_chains($ruleset, $hostfw_options);
2615
2616     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2617
2618     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2619
2620     # generate firewall rules for QEMU VMs
2621     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2622         my $conf = $vmdata->{qemu}->{$vmid};
2623         my $vmfw_conf = $vmfw_configs->{$vmid};
2624         next if !$vmfw_conf;
2625         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2626
2627         foreach my $netid (keys %$conf) {
2628             next if $netid !~ m/^net(\d+)$/;
2629             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2630             next if !$net;
2631             my $iface = "tap${vmid}i$1";
2632
2633             my $bridge = $net->{bridge};
2634             next if !$bridge; # fixme: ?
2635
2636             $bridge .= "v$net->{tag}" if $net->{tag};
2637
2638             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2639
2640             my $macaddr = $net->{macaddr};
2641             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2642                                          $vmfw_conf, $vmid, $bridge, 'IN');
2643             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2644                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2645         }
2646     }
2647
2648     # generate firewall rules for OpenVZ containers
2649     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2650         my $conf = $vmdata->{openvz}->{$vmid};
2651
2652         my $vmfw_conf = $vmfw_configs->{$vmid};
2653         next if !$vmfw_conf;
2654         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2655
2656         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2657             my $ip = $conf->{ip_address}->{value};
2658             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2659             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2660         }
2661
2662         if ($conf->{netif} && $conf->{netif}->{value}) {
2663             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2664             foreach my $netid (keys %$netif) {
2665                 my $d = $netif->{$netid};
2666                 my $bridge = $d->{bridge};
2667                 if (!$bridge) {
2668                     warn "no bridge device for CT $vmid iface '$netid'\n";
2669                     next; # fixme?
2670                 }
2671
2672                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2673
2674                 my $macaddr = $d->{mac};
2675                 my $iface = $d->{host_ifname};
2676                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2677                                              $vmfw_conf, $vmid, $bridge, 'IN');
2678                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2679                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2680             }
2681         }
2682     }
2683
2684     if($hostfw_options->{optimize}){
2685
2686         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2687         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2688         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2689     }
2690
2691     # fixme: what log level should we use here?
2692     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2693
2694     # fixme: should we really block inter-bridge traffic?
2695
2696     # always allow traffic from containers?
2697     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2698
2699     # disable interbridge routing
2700     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2701     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2702     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2703     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2704     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2705     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2706
2707     return ($ruleset, $ipset_ruleset);
2708 }
2709
2710 sub get_ruleset_status {
2711     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2712
2713     my $statushash = {};
2714
2715     foreach my $chain (sort keys %$ruleset) {
2716         my $sig = &$digest_fn($ruleset->{$chain});
2717
2718         $statushash->{$chain}->{sig} = $sig;
2719
2720         my $oldsig = $active_chains->{$chain};
2721         if (!defined($oldsig)) {
2722             $statushash->{$chain}->{action} = 'create';
2723         } else {
2724             if ($oldsig eq $sig) {
2725                 $statushash->{$chain}->{action} = 'exists';
2726             } else {
2727                 $statushash->{$chain}->{action} = 'update';
2728             }
2729         }
2730         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2731         foreach my $cmd (@{$ruleset->{$chain}}) {
2732             print "\t$cmd\n" if $verbose;
2733         }
2734     }
2735
2736     foreach my $chain (sort keys %$active_chains) {
2737         if (!defined($ruleset->{$chain})) {
2738             my $sig = $active_chains->{$chain};
2739             $statushash->{$chain}->{action} = 'delete';
2740             $statushash->{$chain}->{sig} = $sig;
2741             print "delete $chain ($sig)\n" if $verbose;
2742         }
2743     }
2744
2745     return $statushash;
2746 }
2747
2748 sub print_sig_rule {
2749     my ($chain, $sig) = @_;
2750
2751     # We just use this to store a SHA1 checksum used to detect changes
2752     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2753 }
2754
2755 sub get_ruleset_cmdlist {
2756     my ($ruleset, $verbose) = @_;
2757
2758     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2759
2760     my ($active_chains, $hooks) = iptables_get_chains();
2761     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2762
2763     # create missing chains first
2764     foreach my $chain (sort keys %$ruleset) {
2765         my $stat = $statushash->{$chain};
2766         die "internal error" if !$stat;
2767         next if $stat->{action} ne 'create';
2768
2769         $cmdlist .= ":$chain - [0:0]\n";
2770     }
2771
2772     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2773         if (!$hooks->{$h}) {
2774             $cmdlist .= "-A $h -j PVEFW-$h\n";
2775         }
2776     }
2777
2778     foreach my $chain (sort keys %$ruleset) {
2779         my $stat = $statushash->{$chain};
2780         die "internal error" if !$stat;
2781
2782         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2783             $cmdlist .= "-F $chain\n";
2784             foreach my $cmd (@{$ruleset->{$chain}}) {
2785                 $cmdlist .= "$cmd\n";
2786             }
2787             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2788         } elsif ($stat->{action} eq 'delete') {
2789             die "internal error"; # this should not happen
2790         } elsif ($stat->{action} eq 'exists') {
2791             # do nothing
2792         } else {
2793             die "internal error - unknown status '$stat->{action}'";
2794         }
2795     }
2796
2797     foreach my $chain (keys %$statushash) {
2798         next if $statushash->{$chain}->{action} ne 'delete';
2799         $cmdlist .= "-F $chain\n";
2800     }
2801     foreach my $chain (keys %$statushash) {
2802         next if $statushash->{$chain}->{action} ne 'delete';
2803         next if $chain eq 'PVEFW-INPUT';
2804         next if $chain eq 'PVEFW-OUTPUT';
2805         next if $chain eq 'PVEFW-FORWARD';
2806         $cmdlist .= "-X $chain\n";
2807     }
2808
2809     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2810
2811     $cmdlist .= "COMMIT\n";
2812
2813     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2814 }
2815
2816 sub get_ipset_cmdlist {
2817     my ($ruleset, $verbose) = @_;
2818
2819     my $cmdlist = "";
2820
2821     my $delete_cmdlist = "";
2822
2823     my $active_chains = ipset_get_chains();
2824     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2825
2826     # remove stale _swap chains
2827     foreach my $chain (keys %$active_chains) {
2828         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2829             $cmdlist .= "destroy $chain\n";
2830         }
2831     }
2832
2833     foreach my $chain (sort keys %$ruleset) {
2834         my $stat = $statushash->{$chain};
2835         die "internal error" if !$stat;
2836
2837         if ($stat->{action} eq 'create') {
2838             foreach my $cmd (@{$ruleset->{$chain}}) {
2839                 $cmdlist .= "$cmd\n";
2840             }
2841         }
2842
2843         if ($stat->{action} eq 'update') {
2844             my $chain_swap = $chain."_swap";
2845
2846             foreach my $cmd (@{$ruleset->{$chain}}) {
2847                 $cmd =~ s/$chain/$chain_swap/;
2848                 $cmdlist .= "$cmd\n";
2849             }
2850             $cmdlist .= "swap $chain_swap $chain\n";
2851             $cmdlist .= "flush $chain_swap\n";
2852             $cmdlist .= "destroy $chain_swap\n";
2853         }
2854
2855     }
2856
2857     foreach my $chain (keys %$statushash) {
2858         next if $statushash->{$chain}->{action} ne 'delete';
2859
2860         $delete_cmdlist .= "flush $chain\n";
2861         $delete_cmdlist .= "destroy $chain\n";
2862     }
2863
2864     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2865
2866     return ($cmdlist, $delete_cmdlist, $changes);
2867 }
2868
2869 sub apply_ruleset {
2870     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2871
2872     enable_bridge_firewall();
2873
2874     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2875         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2876
2877     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2878
2879     if ($verbose) {
2880         if ($ipset_changes) {
2881             print "ipset changes:\n";
2882             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2883             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2884         }
2885
2886         if ($changes) {
2887             print "iptables changes:\n";
2888             print $cmdlist;
2889         }
2890     }
2891
2892     ipset_restore_cmdlist($ipset_create_cmdlist);
2893
2894     iptables_restore_cmdlist($cmdlist);
2895
2896     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2897
2898     # test: re-read status and check if everything is up to date
2899     my $active_chains = iptables_get_chains();
2900     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2901
2902     my $errors;
2903     foreach my $chain (sort keys %$ruleset) {
2904         my $stat = $statushash->{$chain};
2905         if ($stat->{action} ne 'exists') {
2906             warn "unable to update chain '$chain'\n";
2907             $errors = 1;
2908         }
2909     }
2910
2911     die "unable to apply firewall changes\n" if $errors;
2912
2913     update_nf_conntrack_max($hostfw_conf);
2914
2915     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2916
2917 }
2918
2919 sub update_nf_conntrack_max {
2920     my ($hostfw_conf) = @_;
2921
2922     my $max = 65536; # reasonable default
2923
2924     my $options = $hostfw_conf->{options} || {};
2925
2926     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2927         $max = $options->{nf_conntrack_max};
2928         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2929     }
2930
2931     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2932     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2933
2934     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2935
2936     if ($current != $max) {
2937         my $hashsize = int($max/4);
2938         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2939         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2940     }
2941 }
2942
2943 sub update_nf_conntrack_tcp_timeout_established {
2944     my ($hostfw_conf) = @_;
2945
2946     my $options = $hostfw_conf->{options} || {};
2947
2948     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2949
2950     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2951 }
2952
2953 sub remove_pvefw_chains {
2954
2955     my ($chash, $hooks) = iptables_get_chains();
2956     my $cmdlist = "*filter\n";
2957
2958     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2959         if ($hooks->{$h}) {
2960             $cmdlist .= "-D $h -j PVEFW-$h\n";
2961         }
2962     }
2963
2964     foreach my $chain (keys %$chash) {
2965         $cmdlist .= "-F $chain\n";
2966     }
2967
2968     foreach my $chain (keys %$chash) {
2969         $cmdlist .= "-X $chain\n";
2970     }
2971     $cmdlist .= "COMMIT\n";
2972
2973     iptables_restore_cmdlist($cmdlist);
2974 }
2975
2976 sub update {
2977     my ($start, $verbose) = @_;
2978
2979     my $code = sub {
2980
2981         my $cluster_conf = load_clusterfw_conf();
2982         my $cluster_options = $cluster_conf->{options};
2983
2984         my $enable = $cluster_options->{enable};
2985
2986         my $status = read_pvefw_status();
2987
2988         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2989
2990         if (!$enable) {
2991             PVE::Firewall::remove_pvefw_chains();
2992             print "Firewall disabled\n" if $verbose;
2993             return;
2994         }
2995
2996         my $hostfw_conf = load_hostfw_conf();
2997
2998         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2999
3000         if ($start || $status eq 'active') {
3001
3002             save_pvefw_status('active') if ($status ne 'active');
3003
3004             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
3005         } else {
3006             print "Firewall not active (status = $status)\n" if $verbose;
3007         }
3008     };
3009
3010     run_locked($code);
3011 }
3012
3013
3014 1;