src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 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_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  67
  68 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  69     description => "Security Group name.",
  70     type => 'string',
  71     pattern => $security_group_pattern,
  72     minLength => 2,
  73     maxLength => 20,
  74 });
  75
  76 my $feature_ipset_nomatch = 0;
  77 eval  {
  78     my (undef, undef, $release) = POSIX::uname();
  79     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  80         my ($major, $minor) = ($1, $2);
  81         $feature_ipset_nomatch = 1 if ($major > 3) ||
  82             ($major == 3 && $minor >= 7);
  83     }
  84
  85 };
  86
  87 use Data::Dumper;
  88
  89 my $nodename = PVE::INotify::nodename();
  90
  91 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  92 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  93
  94 my $default_log_level = 'info';
  95
  96 my $log_level_hash = {
  97     debug => 7,
  98     info => 6,
  99     notice => 5,
 100     warning => 4,
 101     err => 3,
 102     crit => 2,
 103     alert => 1,
 104     emerg => 0,
 105 };
 106
 107 # imported/converted from: /usr/share/shorewall/macro.*
 108 my $pve_fw_macros = {
 109     'Amanda' => [
 110         "Amanda Backup",
 111         { action => 'PARAM', proto => 'udp', dport => '10080' },
 112         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 113     ],
 114     'Auth' => [
 115         "Auth (identd) traffic",
 116         { action => 'PARAM', proto => 'tcp', dport => '113' },
 117     ],
 118     'BGP' => [
 119         "Border Gateway Protocol traffic",
 120         { action => 'PARAM', proto => 'tcp', dport => '179' },
 121     ],
 122     'BitTorrent' => [
 123         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 124         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 125         { action => 'PARAM', proto => 'udp', dport => '6881' },
 126     ],
 127     'BitTorrent32' => [
 128         "BitTorrent traffic for BitTorrent 3.2 and later",
 129         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 130         { action => 'PARAM', proto => 'udp', dport => '6881' },
 131     ],
 132     'CVS' => [
 133         "Concurrent Versions System pserver traffic",
 134         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 135     ],
 136     'Citrix' => [
 137         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 138         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 139         { action => 'PARAM', proto => 'udp', dport => '1604' },
 140         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 141     ],
 142     'DAAP' => [
 143         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 144         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 145         { action => 'PARAM', proto => 'udp', dport => '3689' },
 146     ],
 147     'DCC' => [
 148         "Distributed Checksum Clearinghouse spam filtering mechanism",
 149         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 150     ],
 151     'DHCPfwd' => [
 152         "Forwarded DHCP traffic (bidirectional)",
 153         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 154         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 155     ],
 156     'DNS' => [
 157         "Domain Name System traffic (upd and tcp)",
 158         { action => 'PARAM', proto => 'udp', dport => '53' },
 159         { action => 'PARAM', proto => 'tcp', dport => '53' },
 160     ],
 161     'Distcc' => [
 162         "Distributed Compiler service",
 163         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 164     ],
 165     'FTP' => [
 166         "File Transfer Protocol",
 167         { action => 'PARAM', proto => 'tcp', dport => '21' },
 168     ],
 169     'Finger' => [
 170         "Finger protocol (RFC 742)",
 171         { action => 'PARAM', proto => 'tcp', dport => '79' },
 172     ],
 173     'GNUnet' => [
 174         "GNUnet secure peer-to-peer networking traffic",
 175         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 176         { action => 'PARAM', proto => 'udp', dport => '2086' },
 177         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 178         { action => 'PARAM', proto => 'udp', dport => '1080' },
 179     ],
 180     'GRE' => [
 181         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 182         { action => 'PARAM', proto => '47' },
 183         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 184     ],
 185     'Git' => [
 186         "Git distributed revision control traffic",
 187         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 188     ],
 189     'HKP' => [
 190         "OpenPGP HTTP keyserver protocol traffic",
 191         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 192     ],
 193     'HTTP' => [
 194         "Hypertext Transfer Protocol (WWW)",
 195         { action => 'PARAM', proto => 'tcp', dport => '80' },
 196     ],
 197     'HTTPS' => [
 198         "Hypertext Transfer Protocol (WWW) over SSL",
 199         { action => 'PARAM', proto => 'tcp', dport => '443' },
 200     ],
 201     'ICPV2' => [
 202         "Internet Cache Protocol V2 (Squid) traffic",
 203         { action => 'PARAM', proto => 'udp', dport => '3130' },
 204     ],
 205     'ICQ' => [
 206         "AOL Instant Messenger traffic",
 207         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 208     ],
 209     'IMAP' => [
 210         "Internet Message Access Protocol",
 211         { action => 'PARAM', proto => 'tcp', dport => '143' },
 212     ],
 213     'IMAPS' => [
 214         "Internet Message Access Protocol over SSL",
 215         { action => 'PARAM', proto => 'tcp', dport => '993' },
 216     ],
 217     'IPIP' => [
 218         "IPIP capsulation traffic (bidirectional)",
 219         { action => 'PARAM', proto => '94' },
 220         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 221     ],
 222     'IPsec' => [
 223         "IPsec traffic (bidirectional)",
 224         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 225         { action => 'PARAM', proto => '50' },
 226         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 227         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 228     ],
 229     'IPsecah' => [
 230         "IPsec authentication (AH) traffic (bidirectional)",
 231         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 232         { action => 'PARAM', proto => '51' },
 233         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 234         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 235     ],
 236     'IPsecnat' => [
 237         "IPsec traffic and Nat-Traversal (bidirectional)",
 238         { action => 'PARAM', proto => 'udp', dport => '500' },
 239         { action => 'PARAM', proto => 'udp', dport => '4500' },
 240         { action => 'PARAM', proto => '50' },
 241         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 243         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 244     ],
 245     'IRC' => [
 246         "Internet Relay Chat traffic",
 247         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 248     ],
 249     'Jetdirect' => [
 250         "HP Jetdirect printing",
 251         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 252     ],
 253     'L2TP' => [
 254         "Layer 2 Tunneling Protocol traffic",
 255         { action => 'PARAM', proto => 'udp', dport => '1701' },
 256         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 257     ],
 258     'LDAP' => [
 259         "Lightweight Directory Access Protocol traffic",
 260         { action => 'PARAM', proto => 'tcp', dport => '389' },
 261     ],
 262     'LDAPS' => [
 263         "Secure Lightweight Directory Access Protocol traffic",
 264         { action => 'PARAM', proto => 'tcp', dport => '636' },
 265     ],
 266     'MSNP' => [
 267         "Microsoft Notification Protocol",
 268         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 269     ],
 270     'MSSQL' => [
 271         "Microsoft SQL Server",
 272         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 273     ],
 274     'Mail' => [
 275         "Mail traffic (SMTP, SMTPS, Submission)",
 276         { action => 'PARAM', proto => 'tcp', dport => '25' },
 277         { action => 'PARAM', proto => 'tcp', dport => '465' },
 278         { action => 'PARAM', proto => 'tcp', dport => '587' },
 279     ],
 280     'Munin' => [
 281         "Munin networked resource monitoring traffic",
 282         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 283     ],
 284     'MySQL' => [
 285         "MySQL server",
 286         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 287     ],
 288     'NNTP' => [
 289         "NNTP traffic (Usenet).",
 290         { action => 'PARAM', proto => 'tcp', dport => '119' },
 291     ],
 292     'NNTPS' => [
 293         "Encrypted NNTP traffic (Usenet)",
 294         { action => 'PARAM', proto => 'tcp', dport => '563' },
 295     ],
 296     'NTP' => [
 297         "Network Time Protocol (ntpd)",
 298         { action => 'PARAM', proto => 'udp', dport => '123' },
 299     ],
 300     'NTPbi' => [
 301         "Bi-directional NTP (for NTP peers)",
 302         { action => 'PARAM', proto => 'udp', dport => '123' },
 303         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 304     ],
 305     'OSPF' => [
 306         "OSPF multicast traffic",
 307         { action => 'PARAM', proto => '89' },
 308     ],
 309     'OpenVPN' => [
 310         "OpenVPN traffic",
 311         { action => 'PARAM', proto => 'udp', dport => '1194' },
 312     ],
 313     'PCA' => [
 314         "Symantec PCAnywere (tm)",
 315         { action => 'PARAM', proto => 'udp', dport => '5632' },
 316         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 317     ],
 318     'POP3' => [
 319         "POP3 traffic",
 320         { action => 'PARAM', proto => 'tcp', dport => '110' },
 321     ],
 322     'POP3S' => [
 323         "Encrypted POP3 traffic",
 324         { action => 'PARAM', proto => 'tcp', dport => '995' },
 325     ],
 326     'PPtP' => [
 327         "Point-to-Point Tunneling Protocol",
 328         { action => 'PARAM', proto => '47' },
 329         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 330         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 331     ],
 332     'Ping' => [
 333         "ICMP echo request",
 334         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 335     ],
 336     'PostgreSQL' => [
 337         "PostgreSQL server",
 338         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 339     ],
 340     'Printer' => [
 341         "Line Printer protocol printing",
 342         { action => 'PARAM', proto => 'tcp', dport => '515' },
 343     ],
 344     'RDP' => [
 345         "Microsoft Remote Desktop Protocol traffic",
 346         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 347     ],
 348     'RIPbi' => [
 349         "Routing Information Protocol (bidirectional)",
 350         { action => 'PARAM', proto => 'udp', dport => '520' },
 351         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 352     ],
 353     'RNDC' => [
 354         "BIND remote management protocol",
 355         { action => 'PARAM', proto => 'tcp', dport => '953' },
 356     ],
 357     'Razor' => [
 358         "Razor Antispam System",
 359         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 360     ],
 361     'Rdate' => [
 362         "Remote time retrieval (rdate)",
 363         { action => 'PARAM', proto => 'tcp', dport => '37' },
 364     ],
 365     'Rsync' => [
 366         "Rsync server",
 367         { action => 'PARAM', proto => 'tcp', dport => '873' },
 368     ],
 369     'SANE' => [
 370         "SANE network scanning",
 371         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 372     ],
 373     'SMB' => [
 374         "Microsoft SMB traffic",
 375         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 376         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 377         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 378         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 379     ],
 380     'SMBBI' => [
 381         "Microsoft SMB traffic (bidirectional)",
 382         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 383         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 384         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 385         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 386         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 387         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 388         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 389         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 390     ],
 391     'SMBswat' => [
 392         "Samba Web Administration Tool",
 393         { action => 'PARAM', proto => 'tcp', dport => '901' },
 394     ],
 395     'SMTP' => [
 396         "Simple Mail Transfer Protocol",
 397         { action => 'PARAM', proto => 'tcp', dport => '25' },
 398     ],
 399     'SMTPS' => [
 400         "Encrypted Simple Mail Transfer Protocol",
 401         { action => 'PARAM', proto => 'tcp', dport => '465' },
 402     ],
 403     'SNMP' => [
 404         "Simple Network Management Protocol",
 405         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 406         { action => 'PARAM', proto => 'tcp', dport => '161' },
 407     ],
 408     'SPAMD' => [
 409         "Spam Assassin SPAMD traffic",
 410         { action => 'PARAM', proto => 'tcp', dport => '783' },
 411     ],
 412     'SSH' => [
 413         "Secure shell traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '22' },
 415     ],
 416     'SVN' => [
 417         "Subversion server (svnserve)",
 418         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 419     ],
 420     'SixXS' => [
 421         "SixXS IPv6 Deployment and Tunnel Broker",
 422         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 423         { action => 'PARAM', proto => 'udp', dport => '3740' },
 424         { action => 'PARAM', proto => '41' },
 425         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 426     ],
 427     'Squid' => [
 428         "Squid web proxy traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 430     ],
 431     'Submission' => [
 432         "Mail message submission traffic",
 433         { action => 'PARAM', proto => 'tcp', dport => '587' },
 434     ],
 435     'Syslog' => [
 436         "Syslog protocol (RFC 5424) traffic",
 437         { action => 'PARAM', proto => 'udp', dport => '514' },
 438         { action => 'PARAM', proto => 'tcp', dport => '514' },
 439     ],
 440     'TFTP' => [
 441         "Trivial File Transfer Protocol traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '69' },
 443     ],
 444     'Telnet' => [
 445         "Telnet traffic",
 446         { action => 'PARAM', proto => 'tcp', dport => '23' },
 447     ],
 448     'Telnets' => [
 449         "Telnet over SSL",
 450         { action => 'PARAM', proto => 'tcp', dport => '992' },
 451     ],
 452     'Time' => [
 453         "RFC 868 Time protocol",
 454         { action => 'PARAM', proto => 'tcp', dport => '37' },
 455     ],
 456     'Trcrt' => [
 457         "Traceroute (for up to 30 hops) traffic",
 458         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 459         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 460     ],
 461     'VNC' => [
 462         "VNC traffic for VNC display's 0 - 9",
 463         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 464     ],
 465     'VNCL' => [
 466         "VNC traffic from Vncservers to Vncviewers in listen mode",
 467         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 468     ],
 469     'Web' => [
 470         "WWW traffic (HTTP and HTTPS)",
 471         { action => 'PARAM', proto => 'tcp', dport => '80' },
 472         { action => 'PARAM', proto => 'tcp', dport => '443' },
 473     ],
 474     'Webcache' => [
 475         "Web Cache/Proxy traffic (port 8080)",
 476         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 477     ],
 478     'Webmin' => [
 479         "Webmin traffic",
 480         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 481     ],
 482     'Whois' => [
 483         "Whois (nicname, RFC 3912) traffic",
 484         { action => 'PARAM', proto => 'tcp', dport => '43' },
 485     ],
 486 };
 487
 488 my $pve_fw_parsed_macros;
 489 my $pve_fw_macro_descr;
 490 my $pve_fw_preferred_macro_names = {};
 491
 492 my $pve_std_chains = {
 493     'PVEFW-SET-ACCEPT-MARK' => [
 494         "-j MARK --set-mark 1",
 495     ],
 496     'PVEFW-DropBroadcast' => [
 497         # same as shorewall 'Broadcast'
 498         # simply DROP BROADCAST/MULTICAST/ANYCAST
 499         # we can use this to reduce logging
 500         { action => 'DROP', dsttype => 'BROADCAST' },
 501         { action => 'DROP', dsttype => 'MULTICAST' },
 502         { action => 'DROP', dsttype => 'ANYCAST' },
 503         { action => 'DROP', dest => '224.0.0.0/4' },
 504     ],
 505     'PVEFW-reject' => [
 506         # same as shorewall 'reject'
 507         { action => 'DROP', dsttype => 'BROADCAST' },
 508         { action => 'DROP', source => '224.0.0.0/4' },
 509         { action => 'DROP', proto => 'icmp' },
 510         "-p tcp -j REJECT --reject-with tcp-reset",
 511         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 512         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 513         "-j REJECT --reject-with icmp-host-prohibited",
 514     ],
 515     'PVEFW-Drop' => [
 516         # same as shorewall 'Drop', which is equal to DROP,
 517         # but REJECT/DROP some packages to reduce logging,
 518         # and ACCEPT critical ICMP types
 519         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 520         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 521         { action => 'PVEFW-DropBroadcast' },
 522         # ACCEPT critical ICMP types
 523         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 524         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 525         # Drop packets with INVALID state
 526         "-m conntrack --ctstate INVALID -j DROP",
 527         # Drop Microsoft SMB noise
 528         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 529         { action => 'DROP', proto => 'udp', dport => '137:139'},
 530         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 531         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 532         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 533         # Drop new/NotSyn traffic so that it doesn't get logged
 534         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 535         # Drop DNS replies
 536         { action => 'DROP', proto => 'udp', sport => 53 },
 537     ],
 538     'PVEFW-Reject' => [
 539         # same as shorewall 'Reject', which is equal to Reject,
 540         # but REJECT/DROP some packages to reduce logging,
 541         # and ACCEPT critical ICMP types
 542         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 543         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 544         { action => 'PVEFW-DropBroadcast' },
 545         # ACCEPT critical ICMP types
 546         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 547         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 548         # Drop packets with INVALID state
 549         "-m conntrack --ctstate INVALID -j DROP",
 550         # Drop Microsoft SMB noise
 551         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 552         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 553         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 554         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 555         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 556         # Drop new/NotSyn traffic so that it doesn't get logged
 557         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 558         # Drop DNS replies
 559         { action => 'DROP', proto => 'udp', sport => 53 },
 560     ],
 561     'PVEFW-tcpflags' => [
 562         # same as shorewall tcpflags action.
 563         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 564         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 565         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 566         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 567         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 568         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 569     ],
 570     'PVEFW-smurfs' => [
 571         # same as shorewall smurfs action
 572         # Filter packets for smurfs (packets with a broadcast address as the source).
 573         "-s 0.0.0.0/32 -j RETURN",
 574         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 575         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 576     ],
 577 };
 578
 579 # iptables -p icmp -h
 580 my $icmp_type_names = {
 581     any => 1,
 582     'echo-reply' => 1,
 583     'destination-unreachable' => 1,
 584     'network-unreachable' => 1,
 585     'host-unreachable' => 1,
 586     'protocol-unreachable' => 1,
 587     'port-unreachable' => 1,
 588     'fragmentation-needed' => 1,
 589     'source-route-failed' => 1,
 590     'network-unknown' => 1,
 591     'host-unknown' => 1,
 592     'network-prohibited' => 1,
 593     'host-prohibited' => 1,
 594     'TOS-network-unreachable' => 1,
 595     'TOS-host-unreachable' => 1,
 596     'communication-prohibited' => 1,
 597     'host-precedence-violation' => 1,
 598     'precedence-cutoff' => 1,
 599     'source-quench' => 1,
 600     'redirect' => 1,
 601     'network-redirect' => 1,
 602     'host-redirect' => 1,
 603     'TOS-network-redirect' => 1,
 604     'TOS-host-redirect' => 1,
 605     'echo-request' => 1,
 606     'router-advertisement' => 1,
 607     'router-solicitation' => 1,
 608     'time-exceeded' => 1,
 609     'ttl-zero-during-transit' => 1,
 610     'ttl-zero-during-reassembly' => 1,
 611     'parameter-problem' => 1,
 612     'ip-header-bad' => 1,
 613     'required-option-missing' => 1,
 614     'timestamp-request' => 1,
 615     'timestamp-reply' => 1,
 616     'address-mask-request' => 1,
 617     'address-mask-reply' => 1,
 618 };
 619
 620 sub init_firewall_macros {
 621
 622     $pve_fw_parsed_macros = {};
 623
 624     foreach my $k (keys %$pve_fw_macros) {
 625         my $lc_name = lc($k);
 626         my $macro = $pve_fw_macros->{$k};
 627         if (!ref($macro->[0])) {
 628             $pve_fw_macro_descr->{$k} = shift @$macro;
 629         }
 630         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 631         $pve_fw_parsed_macros->{$k} = $macro;
 632     }
 633 }
 634
 635 init_firewall_macros();
 636
 637 sub get_macros {
 638     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 639 }
 640
 641 my $etc_services;
 642
 643 sub get_etc_services {
 644
 645     return $etc_services if $etc_services;
 646
 647     my $filename = "/etc/services";
 648
 649     my $fh = IO::File->new($filename, O_RDONLY);
 650     if (!$fh) {
 651         warn "unable to read '$filename' - $!\n";
 652         return {};
 653     }
 654
 655     my $services = {};
 656
 657     while (my $line = <$fh>) {
 658         chomp ($line);
 659         next if $line =~m/^#/;
 660         next if ($line =~m/^\s*$/);
 661
 662         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 663             $services->{byid}->{$2}->{name} = $1;
 664             $services->{byid}->{$2}->{port} = $2;
 665             $services->{byid}->{$2}->{$3} = 1;
 666             $services->{byname}->{$1} = $services->{byid}->{$2};
 667         }
 668     }
 669
 670     close($fh);
 671
 672     $etc_services = $services;
 673
 674
 675     return $etc_services;
 676 }
 677
 678 my $etc_protocols;
 679
 680 sub get_etc_protocols {
 681     return $etc_protocols if $etc_protocols;
 682
 683     my $filename = "/etc/protocols";
 684
 685     my $fh = IO::File->new($filename, O_RDONLY);
 686     if (!$fh) {
 687         warn "unable to read '$filename' - $!\n";
 688         return {};
 689     }
 690
 691     my $protocols = {};
 692
 693     while (my $line = <$fh>) {
 694         chomp ($line);
 695         next if $line =~m/^#/;
 696         next if ($line =~m/^\s*$/);
 697
 698         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 699             $protocols->{byid}->{$2}->{name} = $1;
 700             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 701         }
 702     }
 703
 704     close($fh);
 705
 706     $etc_protocols = $protocols;
 707
 708     return $etc_protocols;
 709 }
 710
 711 sub parse_address_list {
 712     my ($str) = @_;
 713
 714     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 715
 716     my $count = 0;
 717     my $iprange = 0;
 718     foreach my $elem (split(/,/, $str)) {
 719         $count++;
 720         if (!Net::IP->new($elem)) {
 721             my $err = Net::IP::Error();
 722             die "invalid IP address: $err\n";
 723         }
 724         $iprange = 1 if $elem =~ m/-/;
 725     }
 726
 727     die "you can use a range in a list\n" if $iprange && $count > 1;
 728 }
 729
 730 sub parse_port_name_number_or_range {
 731     my ($str) = @_;
 732
 733     my $services = PVE::Firewall::get_etc_services();
 734     my $count = 0;
 735     my $icmp_port = 0;
 736
 737     foreach my $item (split(/,/, $str)) {
 738         $count++;
 739         if ($item =~ m/^(\d+):(\d+)$/) {
 740             my ($port1, $port2) = ($1, $2);
 741             die "invalid port '$port1'\n" if $port1 > 65535;
 742             die "invalid port '$port2'\n" if $port2 > 65535;
 743         } elsif ($item =~ m/^(\d+)$/) {
 744             my $port = $1;
 745             die "invalid port '$port'\n" if $port > 65535;
 746         } else {
 747             if ($icmp_type_names->{$item}) {
 748                 $icmp_port = 1;
 749             } else {
 750                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 751             }
 752         }
 753     }
 754
 755     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 756
 757     return $count;
 758 }
 759
 760 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 761 sub pve_fw_verify_port_spec {
 762    my ($portstr) = @_;
 763
 764    parse_port_name_number_or_range($portstr);
 765
 766    return $portstr;
 767 }
 768
 769 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 770 sub pve_fw_verify_v4addr_spec {
 771    my ($list) = @_;
 772
 773    parse_address_list($list);
 774
 775    return $list;
 776 }
 777
 778 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 779 sub pve_fw_verify_protocol_spec {
 780    my ($proto) = @_;
 781
 782    my $protocols = get_etc_protocols();
 783
 784    die "unknown protocol '$proto'\n" if $proto &&
 785        !(defined($protocols->{byname}->{$proto}) ||
 786          defined($protocols->{byid}->{$proto}));
 787
 788    return $proto;
 789 }
 790
 791
 792 # helper function for API
 793
 794 sub copy_opject_with_digest {
 795     my ($object) = @_;
 796
 797     my $sha = Digest::SHA->new('sha1');
 798
 799     my $res = {};
 800     foreach my $k (sort keys %$object) {
 801         my $v = $object->{$k};
 802         next if !defined($v);
 803         $res->{$k} = $v;
 804         $sha->add($k, ':', $v, "\n");
 805     }
 806
 807     my $digest = $sha->b64digest;
 808
 809     $res->{digest} = $digest;
 810
 811     return wantarray ? ($res, $digest) : $res;
 812 }
 813
 814 sub copy_list_with_digest {
 815     my ($list) = @_;
 816
 817     my $sha = Digest::SHA->new('sha1');
 818
 819     my $res = [];
 820     foreach my $entry (@$list) {
 821         my $data = {};
 822         foreach my $k (sort keys %$entry) {
 823             my $v = $entry->{$k};
 824             next if !defined($v);
 825             $data->{$k} = $v;
 826             $sha->add($k, ':', $v, "\n");
 827         }
 828         push @$res, $data;
 829     }
 830
 831     my $digest = $sha->b64digest;
 832
 833     foreach my $entry (@$res) {
 834         $entry->{digest} = $digest;
 835     }
 836
 837     return wantarray ? ($res, $digest) : $res;
 838 }
 839
 840 my $rule_properties = {
 841     pos => {
 842         description => "Update rule at position <pos>.",
 843         type => 'integer',
 844         minimum => 0,
 845         optional => 1,
 846     },
 847     digest => get_standard_option('pve-config-digest'),
 848     type => {
 849         type => 'string',
 850         optional => 1,
 851         enum => ['in', 'out', 'group'],
 852     },
 853     action => {
 854         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 855         type => 'string',
 856         optional => 1,
 857         pattern => $security_group_pattern,
 858         maxLength => 20,
 859         minLength => 2,
 860     },
 861     macro => {
 862         type => 'string',
 863         optional => 1,
 864         maxLength => 128,
 865     },
 866     iface => get_standard_option('pve-iface', { optional => 1 }),
 867     source => {
 868         type => 'string', format => 'pve-fw-v4addr-spec',
 869         optional => 1,
 870     },
 871     dest => {
 872         type => 'string', format => 'pve-fw-v4addr-spec',
 873         optional => 1,
 874     },
 875     proto => {
 876         type => 'string', format => 'pve-fw-protocol-spec',
 877         optional => 1,
 878     },
 879     enable => {
 880         type => 'boolean',
 881         optional => 1,
 882     },
 883     sport => {
 884         type => 'string', format => 'pve-fw-port-spec',
 885         optional => 1,
 886     },
 887     dport => {
 888         type => 'string', format => 'pve-fw-port-spec',
 889         optional => 1,
 890     },
 891     comment => {
 892         type => 'string',
 893         optional => 1,
 894     },
 895 };
 896
 897 sub add_rule_properties {
 898     my ($properties) = @_;
 899
 900     foreach my $k (keys %$rule_properties) {
 901         my $h = $rule_properties->{$k};
 902         # copy data, so that we can modify later without side effects
 903         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 904     }
 905
 906     return $properties;
 907 }
 908
 909 sub delete_rule_properties {
 910     my ($rule, $delete_str) = @_;
 911
 912     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 913         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 914             if !defined($rule_properties->{$opt});
 915         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 916             if $opt eq 'type' || $opt eq 'action';
 917         delete $rule->{$opt};
 918     }
 919
 920     return $rule;
 921 }
 922
 923 my $apply_macro = sub {
 924     my ($macro_name, $param, $verify) = @_;
 925
 926     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 927     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 928
 929     my $rules = [];
 930
 931     foreach my $templ (@$macro_rules) {
 932         my $rule = {};
 933         my $param_used = {};
 934         foreach my $k (keys %$templ) {
 935             my $v = $templ->{$k};
 936             if ($v eq 'PARAM') {
 937                 $v = $param->{$k};
 938                 $param_used->{$k} = 1;
 939             } elsif ($v eq 'DEST') {
 940                 $v = $param->{dest};
 941                 $param_used->{dest} = 1;
 942             } elsif ($v eq 'SOURCE') {
 943                 $v = $param->{source};
 944                 $param_used->{source} = 1;
 945             }
 946
 947             if (!defined($v)) {
 948                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 949                 raise_param_exc({ macro => $msg }) if $verify;
 950                 die "$msg\n";
 951             }
 952             $rule->{$k} = $v;
 953         }
 954         foreach my $k (keys %$param) {
 955             next if $k eq 'macro';
 956             next if !defined($param->{$k});
 957             next if $param_used->{$k};
 958             if (defined($rule->{$k})) {
 959                 if ($rule->{$k} ne $param->{$k}) {
 960                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 961                     raise_param_exc({ $k => $msg }) if $verify;
 962                     die "$msg\n";
 963                 }
 964             } else {
 965                 $rule->{$k} = $param->{$k};
 966             }
 967         }
 968         push @$rules, $rule;
 969     }
 970
 971     return $rules;
 972 };
 973
 974 sub verify_rule {
 975     my ($rule, $allow_groups) = @_;
 976
 977     my $type = $rule->{type};
 978
 979     raise_param_exc({ type => "missing property"}) if !$type;
 980     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 981
 982     if ($type eq  'in' || $type eq 'out') {
 983         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 984             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 985     } elsif ($type eq 'group') {
 986         raise_param_exc({ type => "security groups not allowed"})
 987             if !$allow_groups;
 988         raise_param_exc({ action => "invalid characters in security group name"})
 989             if $rule->{action} !~ m/^${security_group_pattern}$/;
 990     } else {
 991         raise_param_exc({ type => "unknown rule type '$type'"});
 992     }
 993
 994     # fixme: verify $rule->{iface}?
 995
 996     if ($rule->{macro}) {
 997         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 998         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 999         $rule->{macro} = $preferred_name;
1000     }
1001
1002     if ($rule->{dport}) {
1003         eval { parse_port_name_number_or_range($rule->{dport}); };
1004         raise_param_exc({ dport => $@ }) if $@;
1005     }
1006
1007     if ($rule->{sport}) {
1008         eval { parse_port_name_number_or_range($rule->{sport}); };
1009         raise_param_exc({ sport => $@ }) if $@;
1010     }
1011
1012     if ($rule->{source}) {
1013         eval { parse_address_list($rule->{source}); };
1014         raise_param_exc({ source => $@ }) if $@;
1015     }
1016
1017     if ($rule->{dest}) {
1018         eval { parse_address_list($rule->{dest}); };
1019         raise_param_exc({ dest => $@ }) if $@;
1020     }
1021
1022     if ($rule->{macro}) {
1023         &$apply_macro($rule->{macro}, $rule, 1);
1024     }
1025
1026     return $rule;
1027 }
1028
1029 sub copy_rule_data {
1030     my ($rule, $param) = @_;
1031
1032     foreach my $k (keys %$rule_properties) {
1033         if (defined(my $v = $param->{$k})) {
1034             if ($v eq '' || $v eq '-') {
1035                 delete $rule->{$k};
1036             } else {
1037                 $rule->{$k} = $v;
1038             }
1039         } else {
1040             delete $rule->{$k};
1041         }
1042     }
1043
1044     # verify rule now
1045
1046     return $rule;
1047 }
1048
1049 # core functions
1050 my $bridge_firewall_enabled = 0;
1051
1052 sub enable_bridge_firewall {
1053
1054     return if $bridge_firewall_enabled; # only once
1055
1056     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1057     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1058
1059     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1060     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1061
1062     $bridge_firewall_enabled = 1;
1063 }
1064
1065 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1066
1067 sub iptables_restore_cmdlist {
1068     my ($cmdlist) = @_;
1069
1070     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1071 }
1072
1073 sub ipset_restore_cmdlist {
1074     my ($cmdlist) = @_;
1075
1076     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1077 }
1078
1079 sub iptables_get_chains {
1080
1081     my $res = {};
1082
1083     # check what chains we want to track
1084     my $is_pvefw_chain = sub {
1085         my $name = shift;
1086
1087         return 1 if $name =~ m/^PVEFW-\S+$/;
1088
1089         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1090
1091         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1092
1093         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1094
1095         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1096         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1097
1098         return undef;
1099     };
1100
1101     my $table = '';
1102
1103     my $hooks = {};
1104
1105     my $parser = sub {
1106         my $line = shift;
1107
1108         return if $line =~ m/^#/;
1109         return if $line =~ m/^\s*$/;
1110
1111         if ($line =~ m/^\*(\S+)$/) {
1112             $table = $1;
1113             return;
1114         }
1115
1116         return if $table ne 'filter';
1117
1118         if ($line =~ m/^:(\S+)\s/) {
1119             my $chain = $1;
1120             return if !&$is_pvefw_chain($chain);
1121             $res->{$chain} = "unknown";
1122         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1123             my ($chain, $sig) = ($1, $2);
1124             return if !&$is_pvefw_chain($chain);
1125             $res->{$chain} = $sig;
1126         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1127             $hooks->{$1} = 1;
1128         } else {
1129             # simply ignore the rest
1130             return;
1131         }
1132     };
1133
1134     run_command("/sbin/iptables-save", outfunc => $parser);
1135
1136     return wantarray ? ($res, $hooks) : $res;
1137 }
1138
1139 sub iptables_chain_digest {
1140     my ($rules) = @_;
1141     my $digest = Digest::SHA->new('sha1');
1142     foreach my $rule (@$rules) { # order is important
1143         $digest->add($rule);
1144     }
1145     return $digest->b64digest;
1146 }
1147
1148 sub ipset_chain_digest {
1149     my ($rules) = @_;
1150
1151     my $digest = Digest::SHA->new('sha1');
1152     foreach my $rule (sort @$rules) { # note: sorted
1153         $digest->add($rule);
1154     }
1155     return $digest->b64digest;
1156 }
1157
1158 sub ipset_get_chains {
1159
1160     my $res = {};
1161     my $chains = {};
1162
1163     my $parser = sub {
1164         my $line = shift;
1165
1166         return if $line =~ m/^#/;
1167         return if $line =~ m/^\s*$/;
1168         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1169             my $chain = $1;
1170             $line =~ s/\s+$//; # delete trailing white space
1171             push @{$chains->{$chain}}, $line;
1172         } else {
1173             # simply ignore the rest
1174             return;
1175         }
1176     };
1177
1178     run_command("/usr/sbin/ipset save", outfunc => $parser);
1179
1180     # compute digest for each chain
1181     foreach my $chain (keys %$chains) {
1182         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1183     }
1184
1185     return $res;
1186 }
1187
1188 sub ruleset_generate_cmdstr {
1189     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1190
1191     return if defined($rule->{enable}) && !$rule->{enable};
1192
1193     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1194
1195     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1196     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1197
1198     my @cmd = ();
1199
1200     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1201     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1202
1203     my $source = $rule->{source};
1204     my $dest = $rule->{dest};
1205
1206     if ($source) {
1207         if ($source =~ m/^(\+)(\S+)$/) {
1208             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1209             push @cmd, "-m set --match-set PVEFW-$2 src";
1210
1211         } elsif ($source =~ m/\-/){
1212             push @cmd, "-m iprange --src-range $source";
1213
1214         } else {
1215             push @cmd, "-s $source";
1216         }
1217     }
1218
1219     if ($dest) {
1220         if ($dest =~ m/^(\+)(\S+)$/) {
1221             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1222             push @cmd, "-m set --match-set PVEFW-$2 dst";
1223
1224         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1225             push @cmd, "-m iprange --dst-range $dest";
1226
1227         } else {
1228             push @cmd, "-s $dest";
1229         }
1230     }
1231
1232     if ($rule->{proto}) {
1233         push @cmd, "-p $rule->{proto}";
1234
1235         my $multiport = 0;
1236         $multiport++ if $nbdport > 1;
1237         $multiport++ if $nbsport > 1;
1238
1239         push @cmd, "--match multiport" if $multiport;
1240
1241         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1242             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1243
1244         if ($rule->{dport}) {
1245             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1246                 # Note: we use dport to store --icmp-type
1247                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1248                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1249             } else {
1250                 if ($nbdport > 1) {
1251                     if ($multiport == 2) {
1252                         push @cmd,  "--ports $rule->{dport}";
1253                     } else {
1254                         push @cmd, "--dports $rule->{dport}";
1255                     }
1256                 } else {
1257                     push @cmd, "--dport $rule->{dport}";
1258                 }
1259             }
1260         }
1261
1262         if ($rule->{sport}) {
1263             if ($nbsport > 1) {
1264                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1265             } else {
1266                 push @cmd, "--sport $rule->{sport}";
1267             }
1268         }
1269     } elsif ($rule->{dport} || $rule->{sport}) {
1270         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1271         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1272     }
1273
1274     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1275
1276     if (my $action = $rule->{action}) {
1277         $action = $actions->{$action} if defined($actions->{$action});
1278         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1279         push @cmd, $goto ? "-g $action" : "-j $action";
1280     }
1281
1282     return scalar(@cmd) ? join(' ', @cmd) : undef;
1283 }
1284
1285 sub ruleset_generate_rule {
1286     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1287
1288     my $rules;
1289
1290     if ($rule->{macro}) {
1291         $rules = &$apply_macro($rule->{macro}, $rule);
1292     } else {
1293         $rules = [ $rule ];
1294     }
1295
1296     foreach my $tmp (@$rules) {
1297         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1298             ruleset_addrule($ruleset, $chain, $cmdstr);
1299         }
1300     }
1301 }
1302
1303 sub ruleset_generate_rule_insert {
1304     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1305
1306     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1307
1308     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1309         ruleset_insertrule($ruleset, $chain, $cmdstr);
1310     }
1311 }
1312
1313 sub ruleset_create_chain {
1314     my ($ruleset, $chain) = @_;
1315
1316     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1317     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1318
1319     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1320
1321     $ruleset->{$chain} = [];
1322 }
1323
1324 sub ruleset_chain_exist {
1325     my ($ruleset, $chain) = @_;
1326
1327     return $ruleset->{$chain} ? 1 : undef;
1328 }
1329
1330 sub ruleset_addrule {
1331    my ($ruleset, $chain, $rule) = @_;
1332
1333    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1334
1335    push @{$ruleset->{$chain}}, "-A $chain $rule";
1336 }
1337
1338 sub ruleset_insertrule {
1339    my ($ruleset, $chain, $rule) = @_;
1340
1341    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1342
1343    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1344 }
1345
1346 sub get_log_rule_base {
1347     my ($chain, $vmid, $msg, $loglevel) = @_;
1348
1349     die "internal error - no log level" if !defined($loglevel);
1350
1351     $vmid = 0 if !defined($vmid);
1352
1353     # Note: we use special format for prefix to pass further
1354     # info to log daemon (VMID, LOGVELEL and CHAIN)
1355
1356     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1357 }
1358
1359 sub ruleset_addlog {
1360     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1361
1362     return if !defined($loglevel);
1363
1364     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1365
1366     $logrule = "$rule $logrule" if defined($rule);
1367
1368     ruleset_addrule($ruleset, $chain, $logrule)
1369 }
1370
1371 sub generate_bridge_chains {
1372     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1373
1374     my $options = $hostfw_conf->{options} || {};
1375
1376     die "error: detected direct route to bridge '$bridge'\n"
1377         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1378
1379     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1380         ruleset_create_chain($ruleset, "$bridge-FW");
1381         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1382         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1383     }
1384
1385     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1386         ruleset_create_chain($ruleset, "$bridge-OUT");
1387         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1388         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1389     }
1390
1391     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1392         ruleset_create_chain($ruleset, "$bridge-IN");
1393         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1394         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1395         # accept traffic to unmanaged bridge ports
1396         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1397     }
1398 }
1399
1400 sub ruleset_add_chain_policy {
1401     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1402
1403     if ($policy eq 'ACCEPT') {
1404
1405         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1406                               { ACCEPT =>  $accept_action});
1407
1408     } elsif ($policy eq 'DROP') {
1409
1410         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1411
1412         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1413
1414         ruleset_addrule($ruleset, $chain, "-j DROP");
1415     } elsif ($policy eq 'REJECT') {
1416         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1417
1418         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1419
1420         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1421     } else {
1422         # should not happen
1423         die "internal error: unknown policy '$policy'";
1424     }
1425 }
1426
1427 sub ruleset_create_vm_chain {
1428     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1429
1430     ruleset_create_chain($ruleset, $chain);
1431     my $accept = generate_nfqueue($options);
1432
1433     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1434         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1435     }
1436
1437     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1438         if ($direction eq 'OUT') {
1439             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1440                                                       proto => 'udp', sport => 68, dport => 67 });
1441         } else {
1442             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1443                                                       proto => 'udp', sport => 67, dport => 68 });
1444         }
1445     }
1446
1447     if ($options->{tcpflags}) {
1448         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1449     }
1450
1451     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1452     if ($direction eq 'OUT') {
1453         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1454     } else {
1455         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1456     }
1457
1458     if ($direction eq 'OUT') {
1459         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1460             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1461         }
1462         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1463     }
1464 }
1465
1466 sub ruleset_generate_vm_rules {
1467     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1468
1469     my $lc_direction = lc($direction);
1470
1471     foreach my $rule (@$rules) {
1472         next if $rule->{iface} && $rule->{iface} ne $netid;
1473         next if !$rule->{enable};
1474         if ($rule->{type} eq 'group') {
1475             my $group_chain = "GROUP-$rule->{action}-$direction";
1476             if(!ruleset_chain_exist($ruleset, $group_chain)){
1477                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1478             }
1479             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1480             if ($direction eq 'OUT'){
1481                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1482             }else{
1483                 my $accept = generate_nfqueue($options);
1484                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1485             }
1486
1487         } else {
1488             next if $rule->{type} ne $lc_direction;
1489             if ($direction eq 'OUT') {
1490                 ruleset_generate_rule($ruleset, $chain, $rule,
1491                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1492             } else {
1493                 my $accept = generate_nfqueue($options);
1494                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1495             }
1496         }
1497     }
1498 }
1499
1500 sub generate_nfqueue {
1501     my ($options) = @_;
1502
1503     my $action = "";
1504     if($options->{ips}){
1505         $action = "NFQUEUE";
1506         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1507             if(defined($3) && defined($1)) {
1508                 $action .= " --queue-balance $1:$3";
1509             }elsif (defined($1)) {
1510                 $action .= " --queue-num $1";
1511             }
1512         }
1513         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1514     }else{
1515         $action = "ACCEPT";
1516     }
1517
1518     return $action;
1519 }
1520
1521 sub ruleset_generate_vm_ipsrules {
1522     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1523
1524     if ($options->{ips} && $direction eq 'IN') {
1525         my $nfqueue = generate_nfqueue($options);
1526
1527         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1528             ruleset_create_chain($ruleset, "PVEFW-IPS");
1529         }
1530
1531         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1532             ruleset_create_chain($ruleset, "$bridge-IPS");
1533             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1534         }
1535
1536         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1537     }
1538 }
1539
1540 sub generate_venet_rules_direction {
1541     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1542
1543     parse_address_list($ip); # make sure we have a valid $ip list
1544
1545     my $lc_direction = lc($direction);
1546
1547     my $rules = $vmfw_conf->{rules};
1548
1549     my $options = $vmfw_conf->{options};
1550     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1551
1552     my $chain = "venet0-$vmid-$direction";
1553
1554     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1555
1556     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1557
1558     # implement policy
1559     my $policy;
1560
1561     if ($direction eq 'OUT') {
1562         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1563     } else {
1564         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1565     }
1566
1567     my $accept = generate_nfqueue($options);
1568     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1569     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1570
1571     # plug into FORWARD, INPUT and OUTPUT chain
1572     if ($direction eq 'OUT') {
1573         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1574             action => $chain,
1575             source => $ip,
1576             iface_in => 'venet0'});
1577
1578         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1579             action => $chain,
1580             source => $ip,
1581             iface_in => 'venet0'});
1582     } else {
1583         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1584             action => $chain,
1585             dest => $ip,
1586             iface_out => 'venet0'});
1587
1588         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1589             action => $chain,
1590             dest => $ip,
1591             iface_out => 'venet0'});
1592     }
1593 }
1594
1595 sub generate_tap_rules_direction {
1596     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1597
1598     my $lc_direction = lc($direction);
1599
1600     my $rules = $vmfw_conf->{rules};
1601
1602     my $options = $vmfw_conf->{options};
1603     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1604
1605     my $tapchain = "$iface-$direction";
1606
1607     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1608
1609     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1610
1611     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1612
1613     # implement policy
1614     my $policy;
1615
1616     if ($direction eq 'OUT') {
1617         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1618     } else {
1619         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1620     }
1621
1622     my $accept = generate_nfqueue($options);
1623     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1624     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1625
1626     # plug the tap chain to bridge chain
1627     if ($direction eq 'IN') {
1628         ruleset_insertrule($ruleset, "$bridge-IN",
1629                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1630     } else {
1631         ruleset_insertrule($ruleset, "$bridge-OUT",
1632                            "-m physdev --physdev-in $iface -j $tapchain");
1633     }
1634 }
1635
1636 sub enable_host_firewall {
1637     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1638
1639     # fixme: allow security groups
1640
1641     my $options = $hostfw_conf->{options};
1642     my $cluster_options = $cluster_conf->{options};
1643     my $rules = $hostfw_conf->{rules};
1644
1645     # host inbound firewall
1646     my $chain = "PVEFW-HOST-IN";
1647     ruleset_create_chain($ruleset, $chain);
1648
1649     my $loglevel = get_option_log_level($options, "log_level_in");
1650
1651     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1652         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1653     }
1654
1655     if ($options->{tcpflags}) {
1656         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1657     }
1658
1659     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1660     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1661     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1662     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1663     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1664     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1665
1666     # we use RETURN because we need to check also tap rules
1667     my $accept_action = 'RETURN';
1668
1669     foreach my $rule (@$rules) {
1670         next if $rule->{type} ne 'in';
1671         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1672     }
1673
1674     # implement input policy
1675     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1676     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1677
1678     # host outbound firewall
1679     $chain = "PVEFW-HOST-OUT";
1680     ruleset_create_chain($ruleset, $chain);
1681
1682     $loglevel = get_option_log_level($options, "log_level_out");
1683
1684     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1685     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1686     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1687     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1688     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1689     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1690
1691     # we use RETURN because we may want to check other thigs later
1692     $accept_action = 'RETURN';
1693
1694     foreach my $rule (@$rules) {
1695         next if $rule->{type} ne 'out';
1696         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1697     }
1698
1699     # implement output policy
1700     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1701     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1702
1703     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1704     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1705 }
1706
1707 sub generate_group_rules {
1708     my ($ruleset, $cluster_conf, $group) = @_;
1709     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1710
1711     my $rules = $cluster_conf->{groups}->{$group};
1712
1713     my $chain = "GROUP-${group}-IN";
1714
1715     ruleset_create_chain($ruleset, $chain);
1716     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1717
1718     foreach my $rule (@$rules) {
1719         next if $rule->{type} ne 'in';
1720         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1721     }
1722
1723     $chain = "GROUP-${group}-OUT";
1724
1725     ruleset_create_chain($ruleset, $chain);
1726     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1727
1728     foreach my $rule (@$rules) {
1729         next if $rule->{type} ne 'out';
1730         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1731         # check also other tap rules later
1732         ruleset_generate_rule($ruleset, $chain, $rule,
1733                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1734     }
1735 }
1736
1737 my $MAX_NETS = 32;
1738 my $valid_netdev_names = {};
1739 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1740     $valid_netdev_names->{"net$i"} = 1;
1741 }
1742
1743 sub parse_fw_rule {
1744     my ($line, $need_iface, $allow_groups) = @_;
1745
1746     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1747
1748     # we can add single line comments to the end of the rule
1749     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1750
1751     # we can disable a rule when prefixed with '|'
1752     my $enable = 1;
1753
1754     $enable = 0 if $line =~ s/^\|//;
1755
1756     my @data = split(/\s+/, $line);
1757     my $expected_elements = $need_iface ? 8 : 7;
1758
1759     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1760
1761     if ($need_iface) {
1762         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1763     } else {
1764         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1765     }
1766
1767     die "incomplete rule\n" if ! ($type && $action);
1768
1769     my $macro;
1770
1771     $type = lc($type);
1772
1773     if ($type eq  'in' || $type eq 'out') {
1774         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1775             # OK
1776         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1777             $action = $2;
1778             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1779             die "unknown macro '$1'\n" if !$preferred_name;
1780             $macro = $preferred_name;
1781         } else {
1782             die "unknown action '$action'\n";
1783         }
1784     } elsif ($type eq 'group') {
1785         die "wrong number of rule elements\n" if scalar(@data) != 3;
1786         die "groups disabled\n" if !$allow_groups;
1787
1788         die "invalid characters in group name\n" if $action !~ m/^${security_group_pattern}$/;
1789     } else {
1790         die "unknown rule type '$type'\n";
1791     }
1792
1793     if ($need_iface) {
1794         $iface = undef if $iface && $iface eq '-';
1795     }
1796
1797     $proto = undef if $proto && $proto eq '-';
1798     pve_fw_verify_protocol_spec($proto) if $proto;
1799
1800     $source = undef if $source && $source eq '-';
1801     $dest = undef if $dest && $dest eq '-';
1802
1803     $dport = undef if $dport && $dport eq '-';
1804     $sport = undef if $sport && $sport eq '-';
1805
1806     parse_port_name_number_or_range($dport) if defined($dport);
1807     parse_port_name_number_or_range($sport) if defined($sport);
1808
1809     parse_address_list($source) if $source;
1810     parse_address_list($dest) if $dest;
1811
1812     return {
1813         type => $type,
1814         enable => $enable,
1815         comment => $comment,
1816         action => $action,
1817         macro => $macro,
1818         iface => $iface,
1819         source => $source,
1820         dest => $dest,
1821         proto => $proto,
1822         dport => $dport,
1823         sport => $sport,
1824     };
1825 }
1826
1827 sub parse_vmfw_option {
1828     my ($line) = @_;
1829
1830     my ($opt, $value);
1831
1832     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1833
1834     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1835         $opt = lc($1);
1836         $value = int($2);
1837     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1838         $opt = lc($1);
1839         $value = $2 ? lc($3) : '';
1840     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1841         $opt = lc($1);
1842         $value = uc($3);
1843     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1844         $opt = lc($1);
1845         $value = $2;
1846     } else {
1847         chomp $line;
1848         die "can't parse option '$line'\n"
1849     }
1850
1851     return ($opt, $value);
1852 }
1853
1854 sub parse_hostfw_option {
1855     my ($line) = @_;
1856
1857     my ($opt, $value);
1858
1859     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1860
1861     if ($line =~ m/^(enable|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1862         $opt = lc($1);
1863         $value = int($2);
1864     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1865         $opt = lc($1);
1866         $value = $2 ? lc($3) : '';
1867     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1868         $opt = lc($1);
1869         $value = int($2);
1870     } else {
1871         chomp $line;
1872         die "can't parse option '$line'\n"
1873     }
1874
1875     return ($opt, $value);
1876 }
1877
1878 sub parse_clusterfw_option {
1879     my ($line) = @_;
1880
1881     my ($opt, $value);
1882
1883     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1884         $opt = lc($1);
1885         $value = int($2);
1886     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1887         $opt = lc($1);
1888         $value = uc($3);
1889     } else {
1890         chomp $line;
1891         die "can't parse option '$line'\n"
1892     }
1893
1894     return ($opt, $value);
1895 }
1896
1897 sub parse_vm_fw_rules {
1898     my ($filename, $fh) = @_;
1899
1900     my $res = { rules => [], options => {}};
1901
1902     my $section;
1903
1904     while (defined(my $line = <$fh>)) {
1905         next if $line =~ m/^#/;
1906         next if $line =~ m/^\s*$/;
1907
1908         my $linenr = $fh->input_line_number();
1909         my $prefix = "$filename (line $linenr)";
1910
1911         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1912             $section = lc($1);
1913             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1914             next;
1915         }
1916         if (!$section) {
1917             warn "$prefix: skip line - no section";
1918             next;
1919         }
1920
1921         next if !$res->{$section}; # skip undefined section
1922
1923         if ($section eq 'options') {
1924             eval {
1925                 my ($opt, $value) = parse_vmfw_option($line);
1926                 $res->{options}->{$opt} = $value;
1927             };
1928             warn "$prefix: $@" if $@;
1929             next;
1930         }
1931
1932         my $rule;
1933         eval { $rule = parse_fw_rule($line, 1, 1); };
1934         if (my $err = $@) {
1935             warn "$prefix: $err";
1936             next;
1937         }
1938
1939         push @{$res->{$section}}, $rule;
1940     }
1941
1942     return $res;
1943 }
1944
1945 sub parse_host_fw_rules {
1946     my ($filename, $fh) = @_;
1947
1948     my $res = { rules => [], options => {}};
1949
1950     my $section;
1951
1952     while (defined(my $line = <$fh>)) {
1953         next if $line =~ m/^#/;
1954         next if $line =~ m/^\s*$/;
1955
1956         my $linenr = $fh->input_line_number();
1957         my $prefix = "$filename (line $linenr)";
1958
1959         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1960             $section = lc($1);
1961             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1962             next;
1963         }
1964         if (!$section) {
1965             warn "$prefix: skip line - no section";
1966             next;
1967         }
1968
1969         next if !$res->{$section}; # skip undefined section
1970
1971         if ($section eq 'options') {
1972             eval {
1973                 my ($opt, $value) = parse_hostfw_option($line);
1974                 $res->{options}->{$opt} = $value;
1975             };
1976             warn "$prefix: $@" if $@;
1977             next;
1978         }
1979
1980         my $rule;
1981         eval { $rule = parse_fw_rule($line, 1, 1); };
1982         if (my $err = $@) {
1983             warn "$prefix: $err";
1984             next;
1985         }
1986
1987         push @{$res->{$section}}, $rule;
1988     }
1989
1990     return $res;
1991 }
1992
1993 sub parse_cluster_fw_rules {
1994     my ($filename, $fh) = @_;
1995
1996     my $section;
1997     my $group;
1998
1999     my $res = {
2000         rules => [],
2001         options => {},
2002         groups => {},
2003         group_comments => {},
2004         ipset => {} ,
2005         ipset_comments => {},
2006     };
2007
2008     while (defined(my $line = <$fh>)) {
2009         next if $line =~ m/^#/;
2010         next if $line =~ m/^\s*$/;
2011
2012         my $linenr = $fh->input_line_number();
2013         my $prefix = "$filename (line $linenr)";
2014
2015         if ($line =~ m/^\[options\]$/i) {
2016             $section = 'options';
2017             next;
2018         }
2019
2020         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2021             $section = 'groups';
2022             $group = lc($1);
2023             my $comment = $2;
2024             $res->{$section}->{$group} = [];
2025             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2026                 if $comment;
2027             next;
2028         }
2029
2030         if ($line =~ m/^\[rules\]$/i) {
2031             $section = 'rules';
2032             next;
2033         }
2034
2035         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2036             $section = 'ipset';
2037             $group = lc($1);
2038             my $comment = $2;
2039             $res->{$section}->{$group} = [];
2040             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2041                 if $comment;
2042             next;
2043         }
2044
2045         if (!$section) {
2046             warn "$prefix: skip line - no section\n";
2047             next;
2048         }
2049
2050         if ($section eq 'options') {
2051             eval {
2052                 my ($opt, $value) = parse_clusterfw_option($line);
2053                 $res->{options}->{$opt} = $value;
2054             };
2055             warn "$prefix: $@" if $@;
2056         } elsif ($section eq 'rules') {
2057             my $rule;
2058             eval { $rule = parse_fw_rule($line, 1, 1); };
2059             if (my $err = $@) {
2060                 warn "$prefix: $err";
2061                 next;
2062             }
2063             push @{$res->{$section}}, $rule;
2064         } elsif ($section eq 'groups') {
2065             my $rule;
2066             eval { $rule = parse_fw_rule($line, 0, 0); };
2067             if (my $err = $@) {
2068                 warn "$prefix: $err";
2069                 next;
2070             }
2071             push @{$res->{$section}->{$group}}, $rule;
2072         } elsif ($section eq 'ipset') {
2073             # we can add single line comments to the end of the rule
2074             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2075
2076             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2077             my $nomatch = $1;
2078             my $cidr = $2;
2079
2080             $cidr =~ s|/32$||;
2081
2082             eval { pve_verify_ipv4_or_cidr($cidr); };
2083             if (my $err = $@) {
2084                 warn "$prefix: $cidr - $err";
2085                 next;
2086             }
2087
2088             my $entry = { cidr => $cidr };
2089             $entry->{nomatch} = 1 if $nomatch;
2090             $entry->{comment} = $comment if $comment;
2091
2092             push @{$res->{$section}->{$group}}, $entry;
2093         }
2094     }
2095
2096     return $res;
2097 }
2098
2099 sub run_locked {
2100     my ($code, @param) = @_;
2101
2102     my $timeout = 10;
2103
2104     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2105
2106     die $@ if $@;
2107
2108     return $res;
2109 }
2110
2111 sub read_local_vm_config {
2112
2113     my $openvz = {};
2114     my $qemu = {};
2115
2116     my $vmdata = { openvz => $openvz, qemu => $qemu };
2117
2118     my $vmlist = PVE::Cluster::get_vmlist();
2119     return $vmdata if !$vmlist || !$vmlist->{ids};
2120     my $ids = $vmlist->{ids};
2121
2122     foreach my $vmid (keys %$ids) {
2123         next if !$vmid; # skip VE0
2124         my $d = $ids->{$vmid};
2125         next if !$d->{node} || $d->{node} ne $nodename;
2126         next if !$d->{type};
2127         if ($d->{type} eq 'openvz') {
2128             if ($have_pve_manager) {
2129                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2130                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2131                     $openvz->{$vmid} = $conf;
2132                 }
2133             }
2134         } elsif ($d->{type} eq 'qemu') {
2135             if ($have_qemu_server) {
2136                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2137                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2138                     $qemu->{$vmid} = $conf;
2139                 }
2140             }
2141         }
2142     }
2143
2144     return $vmdata;
2145 };
2146
2147 sub load_vmfw_conf {
2148     my ($vmid) = @_;
2149
2150     my $vmfw_conf = {};
2151
2152     my $filename = "/etc/pve/firewall/$vmid.fw";
2153     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2154         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2155     }
2156
2157     return $vmfw_conf;
2158 }
2159
2160 my $format_rules = sub {
2161     my ($rules, $need_iface) = @_;
2162
2163     my $raw = '';
2164
2165     foreach my $rule (@$rules) {
2166         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2167             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2168             $raw .= uc($rule->{type});
2169             if ($rule->{macro}) {
2170                 $raw .= " $rule->{macro}($rule->{action})";
2171             } else {
2172                 $raw .= " " . $rule->{action};
2173             }
2174             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2175
2176             if ($rule->{type} ne  'group')  {
2177                 $raw .= " " . ($rule->{source} || '-');
2178                 $raw .= " " . ($rule->{dest} || '-');
2179                 $raw .= " " . ($rule->{proto} || '-');
2180                 $raw .= " " . ($rule->{dport} || '-');
2181                 $raw .= " " . ($rule->{sport} || '-');
2182             }
2183
2184             $raw .= " # " . encode('utf8', $rule->{comment})
2185                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2186             $raw .= "\n";
2187         } else {
2188             die "unknown rule type '$rule->{type}'";
2189         }
2190     }
2191
2192     return $raw;
2193 };
2194
2195 my $format_options = sub {
2196     my ($options) = @_;
2197
2198     my $raw = '';
2199
2200     $raw .= "[OPTIONS]\n\n";
2201     foreach my $opt (keys %$options) {
2202         $raw .= "$opt: $options->{$opt}\n";
2203     }
2204     $raw .= "\n";
2205
2206     return $raw;
2207 };
2208
2209 my $format_ipset = sub {
2210     my ($options) = @_;
2211
2212     my $raw = '';
2213
2214     my $nethash = {};
2215     foreach my $entry (@$options) {
2216         $nethash->{$entry->{cidr}} = $entry;
2217     }
2218
2219     foreach my $cidr (sort keys %$nethash) {
2220         my $entry = $nethash->{$cidr};
2221         my $line = $entry->{nomatch} ? '!' : '';
2222         $line .= $entry->{cidr};
2223         $line .= " # " . encode('utf8', $entry->{comment})
2224             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2225         $raw .= "$line\n";
2226     }
2227
2228     return $raw;
2229 };
2230
2231 sub save_vmfw_conf {
2232     my ($vmid, $vmfw_conf) = @_;
2233
2234     my $raw = '';
2235
2236     my $options = $vmfw_conf->{options};
2237     $raw .= &$format_options($options) if scalar(keys %$options);
2238
2239     my $rules = $vmfw_conf->{rules};
2240     if (scalar(@$rules)) {
2241         $raw .= "[RULES]\n\n";
2242         $raw .= &$format_rules($rules, 1);
2243         $raw .= "\n";
2244     }
2245
2246     my $filename = "/etc/pve/firewall/$vmid.fw";
2247     PVE::Tools::file_set_contents($filename, $raw);
2248 }
2249
2250 sub read_vm_firewall_configs {
2251     my ($vmdata) = @_;
2252     my $vmfw_configs = {};
2253
2254     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2255         my $vmfw_conf = load_vmfw_conf($vmid);
2256         next if !$vmfw_conf->{options}; # skip if file does not exists
2257         $vmfw_configs->{$vmid} = $vmfw_conf;
2258     }
2259
2260     return $vmfw_configs;
2261 }
2262
2263 sub get_option_log_level {
2264     my ($options, $k) = @_;
2265
2266     my $v = $options->{$k};
2267     $v = $default_log_level if !defined($v);
2268
2269     return undef if $v eq '' || $v eq 'nolog';
2270
2271     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2272
2273     return $v if ($v >= 0) && ($v <= 7);
2274
2275     warn "unknown log level ($k = '$v')\n";
2276
2277     return undef;
2278 }
2279
2280 sub generate_std_chains {
2281     my ($ruleset, $options) = @_;
2282
2283     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2284
2285     # same as shorewall smurflog.
2286     my $chain = 'PVEFW-smurflog';
2287     $pve_std_chains->{$chain} = [];
2288
2289     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2290     push @{$pve_std_chains->{$chain}}, "-j DROP";
2291
2292     # same as shorewall logflags action.
2293     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2294     $chain = 'PVEFW-logflags';
2295     $pve_std_chains->{$chain} = [];
2296
2297     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2298     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2299     push @{$pve_std_chains->{$chain}}, "-j DROP";
2300
2301     foreach my $chain (keys %$pve_std_chains) {
2302         ruleset_create_chain($ruleset, $chain);
2303         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2304             if (ref($rule)) {
2305                 ruleset_generate_rule($ruleset, $chain, $rule);
2306             } else {
2307                 ruleset_addrule($ruleset, $chain, $rule);
2308             }
2309         }
2310     }
2311 }
2312
2313 sub generate_ipset_chains {
2314     my ($ipset_ruleset, $fw_conf) = @_;
2315
2316     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2317         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2318     }
2319 }
2320
2321 sub generate_ipset {
2322     my ($ipset_ruleset, $name, $options) = @_;
2323
2324     my $hashsize = scalar(@$options);
2325     if ($hashsize <= 64) {
2326         $hashsize = 64;
2327     } else {
2328         $hashsize = round_powerof2($hashsize);
2329     }
2330
2331     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2332
2333     # remove duplicates
2334     my $nethash = {};
2335     foreach my $entry (@$options) {
2336         $nethash->{$entry->{cidr}} = $entry;
2337     }
2338
2339     foreach my $cidr (sort keys %$nethash) {
2340         my $entry = $nethash->{$cidr};
2341
2342         my $cmd = "add $name $cidr";
2343         if ($entry->{nomatch}) {
2344             if ($feature_ipset_nomatch) {
2345                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2346             } else {
2347                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2348             }
2349         } else {
2350             push @{$ipset_ruleset->{$name}}, $cmd;
2351         }
2352     }
2353 }
2354
2355 sub round_powerof2 {
2356     my ($int) = @_;
2357
2358     $int--;
2359     $int |= $int >> $_ foreach (1,2,4,8,16);
2360     return ++$int;
2361 }
2362
2363 sub save_pvefw_status {
2364     my ($status) = @_;
2365
2366     die "unknown status '$status' - internal error"
2367         if $status !~ m/^(stopped|active)$/;
2368
2369     mkdir dirname($pve_fw_status_filename);
2370     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2371 }
2372
2373 sub read_pvefw_status {
2374
2375     my $status = 'unknown';
2376
2377     return 'stopped' if ! -f $pve_fw_status_filename;
2378
2379     eval {
2380         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2381     };
2382     warn $@ if $@;
2383
2384     return $status;
2385 }
2386
2387 # fixme: move to pve-common PVE::ProcFSTools
2388 sub read_proc_net_route {
2389     my $filename = "/proc/net/route";
2390
2391     my $res = {};
2392
2393     my $fh = IO::File->new ($filename, "r");
2394     return $res if !$fh;
2395
2396     my $int_to_quad = sub {
2397         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2398     };
2399
2400     while (defined(my $line = <$fh>)) {
2401         next if $line =~/^Iface\s+Destination/; # skip head
2402         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2403         push @{$res->{$iface}}, {
2404             dest => &$int_to_quad(hex($dest)),
2405             gateway => &$int_to_quad(hex($gateway)),
2406             mask => &$int_to_quad(hex($mask)),
2407             metric => $metric,
2408             mtu => $mtu,
2409         };
2410     }
2411
2412     return $res;
2413 }
2414
2415 sub load_clusterfw_conf {
2416
2417     my $cluster_conf = {};
2418      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2419         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2420     }
2421
2422     return $cluster_conf;
2423 }
2424
2425 sub save_clusterfw_conf {
2426     my ($cluster_conf) = @_;
2427
2428     my $raw = '';
2429
2430     my $options = $cluster_conf->{options};
2431     $raw .= &$format_options($options) if scalar(keys %$options);
2432
2433     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2434         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2435             my $utf8comment = encode('utf8', $comment);
2436             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2437         } else {
2438             $raw .= "[IPSET $ipset]\n\n";
2439         }
2440         my $options = $cluster_conf->{ipset}->{$ipset};
2441         $raw .= &$format_ipset($options);
2442         $raw .= "\n";
2443     }
2444
2445     my $rules = $cluster_conf->{rules};
2446     if (scalar(@$rules)) {
2447         $raw .= "[RULES]\n\n";
2448         $raw .= &$format_rules($rules, 1);
2449         $raw .= "\n";
2450     }
2451
2452     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2453         my $rules = $cluster_conf->{groups}->{$group};
2454         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2455             my $utf8comment = encode('utf8', $comment);
2456             $raw .= "[group $group] # $utf8comment\n\n";
2457         } else {
2458             $raw .= "[group $group]\n\n";
2459         }
2460
2461         $raw .= &$format_rules($rules, 0);
2462         $raw .= "\n";
2463     }
2464
2465     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2466 }
2467
2468 sub load_hostfw_conf {
2469
2470     my $hostfw_conf = {};
2471     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2472         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2473     }
2474     return $hostfw_conf;
2475 }
2476
2477 sub save_hostfw_conf {
2478     my ($hostfw_conf) = @_;
2479
2480     my $raw = '';
2481
2482     my $options = $hostfw_conf->{options};
2483     $raw .= &$format_options($options) if scalar(keys %$options);
2484
2485     my $rules = $hostfw_conf->{rules};
2486     if (scalar(@$rules)) {
2487         $raw .= "[RULES]\n\n";
2488         $raw .= &$format_rules($rules, 1);
2489         $raw .= "\n";
2490     }
2491
2492     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2493 }
2494
2495 sub compile {
2496     my ($cluster_conf, $hostfw_conf) = @_;
2497
2498     $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2499     $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2500
2501     my $vmdata = read_local_vm_config();
2502     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2503
2504     my $routing_table = read_proc_net_route();
2505
2506     my $ipset_ruleset = {};
2507     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2508
2509     my $ruleset = {};
2510
2511     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2512     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2513
2514     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2515
2516     my $hostfw_options = $hostfw_conf->{options} || {};
2517
2518     generate_std_chains($ruleset, $hostfw_options);
2519
2520     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2521
2522     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2523
2524     # generate firewall rules for QEMU VMs
2525     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2526         my $conf = $vmdata->{qemu}->{$vmid};
2527         my $vmfw_conf = $vmfw_configs->{$vmid};
2528         next if !$vmfw_conf;
2529         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2530
2531         foreach my $netid (keys %$conf) {
2532             next if $netid !~ m/^net(\d+)$/;
2533             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2534             next if !$net;
2535             my $iface = "tap${vmid}i$1";
2536
2537             my $bridge = $net->{bridge};
2538             next if !$bridge; # fixme: ?
2539
2540             $bridge .= "v$net->{tag}" if $net->{tag};
2541
2542             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2543
2544             my $macaddr = $net->{macaddr};
2545             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2546                                          $vmfw_conf, $vmid, $bridge, 'IN');
2547             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2548                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2549         }
2550     }
2551
2552     # generate firewall rules for OpenVZ containers
2553     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2554         my $conf = $vmdata->{openvz}->{$vmid};
2555
2556         my $vmfw_conf = $vmfw_configs->{$vmid};
2557         next if !$vmfw_conf;
2558         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2559
2560         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2561             my $ip = $conf->{ip_address}->{value};
2562             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2563             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2564         }
2565
2566         if ($conf->{netif} && $conf->{netif}->{value}) {
2567             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2568             foreach my $netid (keys %$netif) {
2569                 my $d = $netif->{$netid};
2570                 my $bridge = $d->{bridge};
2571                 if (!$bridge) {
2572                     warn "no bridge device for CT $vmid iface '$netid'\n";
2573                     next; # fixme?
2574                 }
2575
2576                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2577
2578                 my $macaddr = $d->{mac};
2579                 my $iface = $d->{host_ifname};
2580                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2581                                              $vmfw_conf, $vmid, $bridge, 'IN');
2582                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2583                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2584             }
2585         }
2586     }
2587
2588     if($hostfw_options->{optimize}){
2589
2590         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2591         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2592         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2593     }
2594
2595     # fixme: what log level should we use here?
2596     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2597
2598     # fixme: should we really block inter-bridge traffic?
2599
2600     # always allow traffic from containers?
2601     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2602
2603     # disable interbridge routing
2604     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2605     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2606     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2607     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2608     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2609     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2610
2611     return ($ruleset, $ipset_ruleset);
2612 }
2613
2614 sub get_ruleset_status {
2615     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2616
2617     my $statushash = {};
2618
2619     foreach my $chain (sort keys %$ruleset) {
2620         my $sig = &$digest_fn($ruleset->{$chain});
2621
2622         $statushash->{$chain}->{sig} = $sig;
2623
2624         my $oldsig = $active_chains->{$chain};
2625         if (!defined($oldsig)) {
2626             $statushash->{$chain}->{action} = 'create';
2627         } else {
2628             if ($oldsig eq $sig) {
2629                 $statushash->{$chain}->{action} = 'exists';
2630             } else {
2631                 $statushash->{$chain}->{action} = 'update';
2632             }
2633         }
2634         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2635         foreach my $cmd (@{$ruleset->{$chain}}) {
2636             print "\t$cmd\n" if $verbose;
2637         }
2638     }
2639
2640     foreach my $chain (sort keys %$active_chains) {
2641         if (!defined($ruleset->{$chain})) {
2642             my $sig = $active_chains->{$chain};
2643             $statushash->{$chain}->{action} = 'delete';
2644             $statushash->{$chain}->{sig} = $sig;
2645             print "delete $chain ($sig)\n" if $verbose;
2646         }
2647     }
2648
2649     return $statushash;
2650 }
2651
2652 sub print_sig_rule {
2653     my ($chain, $sig) = @_;
2654
2655     # We just use this to store a SHA1 checksum used to detect changes
2656     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2657 }
2658
2659 sub get_ruleset_cmdlist {
2660     my ($ruleset, $verbose) = @_;
2661
2662     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2663
2664     my ($active_chains, $hooks) = iptables_get_chains();
2665     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2666
2667     # create missing chains first
2668     foreach my $chain (sort keys %$ruleset) {
2669         my $stat = $statushash->{$chain};
2670         die "internal error" if !$stat;
2671         next if $stat->{action} ne 'create';
2672
2673         $cmdlist .= ":$chain - [0:0]\n";
2674     }
2675
2676     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2677         if (!$hooks->{$h}) {
2678             $cmdlist .= "-A $h -j PVEFW-$h\n";
2679         }
2680     }
2681
2682     foreach my $chain (sort keys %$ruleset) {
2683         my $stat = $statushash->{$chain};
2684         die "internal error" if !$stat;
2685
2686         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2687             $cmdlist .= "-F $chain\n";
2688             foreach my $cmd (@{$ruleset->{$chain}}) {
2689                 $cmdlist .= "$cmd\n";
2690             }
2691             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2692         } elsif ($stat->{action} eq 'delete') {
2693             die "internal error"; # this should not happen
2694         } elsif ($stat->{action} eq 'exists') {
2695             # do nothing
2696         } else {
2697             die "internal error - unknown status '$stat->{action}'";
2698         }
2699     }
2700
2701     foreach my $chain (keys %$statushash) {
2702         next if $statushash->{$chain}->{action} ne 'delete';
2703         $cmdlist .= "-F $chain\n";
2704     }
2705     foreach my $chain (keys %$statushash) {
2706         next if $statushash->{$chain}->{action} ne 'delete';
2707         next if $chain eq 'PVEFW-INPUT';
2708         next if $chain eq 'PVEFW-OUTPUT';
2709         next if $chain eq 'PVEFW-FORWARD';
2710         $cmdlist .= "-X $chain\n";
2711     }
2712
2713     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2714
2715     $cmdlist .= "COMMIT\n";
2716
2717     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2718 }
2719
2720 sub get_ipset_cmdlist {
2721     my ($ruleset, $verbose) = @_;
2722
2723     my $cmdlist = "";
2724
2725     my $delete_cmdlist = "";
2726
2727     my $active_chains = ipset_get_chains();
2728     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2729
2730     # remove stale _swap chains
2731     foreach my $chain (keys %$active_chains) {
2732         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2733             $cmdlist .= "destroy $chain\n";
2734         }
2735     }
2736
2737     foreach my $chain (sort keys %$ruleset) {
2738         my $stat = $statushash->{$chain};
2739         die "internal error" if !$stat;
2740
2741         if ($stat->{action} eq 'create') {
2742             foreach my $cmd (@{$ruleset->{$chain}}) {
2743                 $cmdlist .= "$cmd\n";
2744             }
2745         }
2746
2747         if ($stat->{action} eq 'update') {
2748             my $chain_swap = $chain."_swap";
2749
2750             foreach my $cmd (@{$ruleset->{$chain}}) {
2751                 $cmd =~ s/$chain/$chain_swap/;
2752                 $cmdlist .= "$cmd\n";
2753             }
2754             $cmdlist .= "swap $chain_swap $chain\n";
2755             $cmdlist .= "flush $chain_swap\n";
2756             $cmdlist .= "destroy $chain_swap\n";
2757         }
2758
2759     }
2760
2761     foreach my $chain (keys %$statushash) {
2762         next if $statushash->{$chain}->{action} ne 'delete';
2763
2764         $delete_cmdlist .= "flush $chain\n";
2765         $delete_cmdlist .= "destroy $chain\n";
2766     }
2767
2768     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2769
2770     return ($cmdlist, $delete_cmdlist, $changes);
2771 }
2772
2773 sub apply_ruleset {
2774     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2775
2776     enable_bridge_firewall();
2777
2778     update_nf_conntrack_max($hostfw_conf);
2779
2780     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2781
2782     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2783         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2784
2785     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2786
2787     if ($verbose) {
2788         if ($ipset_changes) {
2789             print "ipset changes:\n";
2790             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2791             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2792         }
2793
2794         if ($changes) {
2795             print "iptables changes:\n";
2796             print $cmdlist;
2797         }
2798     }
2799
2800     ipset_restore_cmdlist($ipset_create_cmdlist);
2801
2802     iptables_restore_cmdlist($cmdlist);
2803
2804     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2805
2806     # test: re-read status and check if everything is up to date
2807     my $active_chains = iptables_get_chains();
2808     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2809
2810     my $errors;
2811     foreach my $chain (sort keys %$ruleset) {
2812         my $stat = $statushash->{$chain};
2813         if ($stat->{action} ne 'exists') {
2814             warn "unable to update chain '$chain'\n";
2815             $errors = 1;
2816         }
2817     }
2818
2819     die "unable to apply firewall changes\n" if $errors;
2820 }
2821
2822 sub update_nf_conntrack_max {
2823     my ($hostfw_conf) = @_;
2824
2825     my $max = 65536; # reasonable default
2826
2827     my $options = $hostfw_conf->{options} || {};
2828
2829     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2830         $max = $options->{nf_conntrack_max};
2831         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2832     }
2833
2834     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2835     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2836
2837     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2838
2839     if ($current != $max) {
2840         my $hashsize = int($max/4);
2841         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2842         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2843     }
2844 }
2845
2846 sub update_nf_conntrack_tcp_timeout_established {
2847     my ($hostfw_conf) = @_;
2848
2849     my $options = $hostfw_conf->{options} || {};
2850
2851     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2852
2853     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2854 }
2855
2856 sub remove_pvefw_chains {
2857
2858     my ($chash, $hooks) = iptables_get_chains();
2859     my $cmdlist = "*filter\n";
2860
2861     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2862         if ($hooks->{$h}) {
2863             $cmdlist .= "-D $h -j PVEFW-$h\n";
2864         }
2865     }
2866
2867     foreach my $chain (keys %$chash) {
2868         $cmdlist .= "-F $chain\n";
2869     }
2870
2871     foreach my $chain (keys %$chash) {
2872         $cmdlist .= "-X $chain\n";
2873     }
2874     $cmdlist .= "COMMIT\n";
2875
2876     iptables_restore_cmdlist($cmdlist);
2877 }
2878
2879 sub update {
2880     my ($start, $verbose) = @_;
2881
2882     my $code = sub {
2883
2884         my $cluster_conf = load_clusterfw_conf();
2885         my $cluster_options = $cluster_conf->{options};
2886
2887         my $enable = $cluster_options->{enable};
2888
2889         my $status = read_pvefw_status();
2890
2891         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2892
2893         if (!$enable) {
2894             PVE::Firewall::remove_pvefw_chains();
2895             print "Firewall disabled\n" if $verbose;
2896             return;
2897         }
2898
2899         my $hostfw_conf = load_hostfw_conf();
2900
2901         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2902
2903         if ($start || $status eq 'active') {
2904
2905             save_pvefw_status('active') if ($status ne 'active');
2906
2907             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2908         } else {
2909             print "Firewall not active (status = $status)\n" if $verbose;
2910         }
2911     };
2912
2913     run_locked($code);
2914 }
2915
2916
2917 1;