src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  60     description => "Log level.",
  61     type => 'string',
  62     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  63     optional => 1,
  64 });
  65
  66 my $security_group_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     return if $str =~ m/^${security_group_pattern}$/; # aliases
 716
 717     my $count = 0;
 718     my $iprange = 0;
 719     foreach my $elem (split(/,/, $str)) {
 720         $count++;
 721         if (!Net::IP->new($elem)) {
 722             my $err = Net::IP::Error();
 723             die "invalid IP address: $err\n";
 724         }
 725         $iprange = 1 if $elem =~ m/-/;
 726     }
 727
 728     die "you can use a range in a list\n" if $iprange && $count > 1;
 729 }
 730
 731 sub parse_port_name_number_or_range {
 732     my ($str) = @_;
 733
 734     my $services = PVE::Firewall::get_etc_services();
 735     my $count = 0;
 736     my $icmp_port = 0;
 737
 738     foreach my $item (split(/,/, $str)) {
 739         $count++;
 740         if ($item =~ m/^(\d+):(\d+)$/) {
 741             my ($port1, $port2) = ($1, $2);
 742             die "invalid port '$port1'\n" if $port1 > 65535;
 743             die "invalid port '$port2'\n" if $port2 > 65535;
 744         } elsif ($item =~ m/^(\d+)$/) {
 745             my $port = $1;
 746             die "invalid port '$port'\n" if $port > 65535;
 747         } else {
 748             if ($icmp_type_names->{$item}) {
 749                 $icmp_port = 1;
 750             } else {
 751                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 752             }
 753         }
 754     }
 755
 756     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 757
 758     return $count;
 759 }
 760
 761 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 762 sub pve_fw_verify_port_spec {
 763    my ($portstr) = @_;
 764
 765    parse_port_name_number_or_range($portstr);
 766
 767    return $portstr;
 768 }
 769
 770 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 771 sub pve_fw_verify_v4addr_spec {
 772    my ($list) = @_;
 773
 774    parse_address_list($list);
 775
 776    return $list;
 777 }
 778
 779 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 780 sub pve_fw_verify_protocol_spec {
 781    my ($proto) = @_;
 782
 783    my $protocols = get_etc_protocols();
 784
 785    die "unknown protocol '$proto'\n" if $proto &&
 786        !(defined($protocols->{byname}->{$proto}) ||
 787          defined($protocols->{byid}->{$proto}));
 788
 789    return $proto;
 790 }
 791
 792
 793 # helper function for API
 794
 795 sub copy_opject_with_digest {
 796     my ($object) = @_;
 797
 798     my $sha = Digest::SHA->new('sha1');
 799
 800     my $res = {};
 801     foreach my $k (sort keys %$object) {
 802         my $v = $object->{$k};
 803         next if !defined($v);
 804         $res->{$k} = $v;
 805         $sha->add($k, ':', $v, "\n");
 806     }
 807
 808     my $digest = $sha->b64digest;
 809
 810     $res->{digest} = $digest;
 811
 812     return wantarray ? ($res, $digest) : $res;
 813 }
 814
 815 sub copy_list_with_digest {
 816     my ($list) = @_;
 817
 818     my $sha = Digest::SHA->new('sha1');
 819
 820     my $res = [];
 821     foreach my $entry (@$list) {
 822         my $data = {};
 823         foreach my $k (sort keys %$entry) {
 824             my $v = $entry->{$k};
 825             next if !defined($v);
 826             $data->{$k} = $v;
 827             $sha->add($k, ':', $v, "\n");
 828         }
 829         push @$res, $data;
 830     }
 831
 832     my $digest = $sha->b64digest;
 833
 834     foreach my $entry (@$res) {
 835         $entry->{digest} = $digest;
 836     }
 837
 838     return wantarray ? ($res, $digest) : $res;
 839 }
 840
 841 my $rule_properties = {
 842     pos => {
 843         description => "Update rule at position <pos>.",
 844         type => 'integer',
 845         minimum => 0,
 846         optional => 1,
 847     },
 848     digest => get_standard_option('pve-config-digest'),
 849     type => {
 850         type => 'string',
 851         optional => 1,
 852         enum => ['in', 'out', 'group'],
 853     },
 854     action => {
 855         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 856         type => 'string',
 857         optional => 1,
 858         pattern => $security_group_pattern,
 859         maxLength => 20,
 860         minLength => 2,
 861     },
 862     macro => {
 863         type => 'string',
 864         optional => 1,
 865         maxLength => 128,
 866     },
 867     iface => get_standard_option('pve-iface', { optional => 1 }),
 868     source => {
 869         type => 'string', format => 'pve-fw-v4addr-spec',
 870         optional => 1,
 871     },
 872     dest => {
 873         type => 'string', format => 'pve-fw-v4addr-spec',
 874         optional => 1,
 875     },
 876     proto => {
 877         type => 'string', format => 'pve-fw-protocol-spec',
 878         optional => 1,
 879     },
 880     enable => {
 881         type => 'boolean',
 882         optional => 1,
 883     },
 884     sport => {
 885         type => 'string', format => 'pve-fw-port-spec',
 886         optional => 1,
 887     },
 888     dport => {
 889         type => 'string', format => 'pve-fw-port-spec',
 890         optional => 1,
 891     },
 892     comment => {
 893         type => 'string',
 894         optional => 1,
 895     },
 896 };
 897
 898 sub add_rule_properties {
 899     my ($properties) = @_;
 900
 901     foreach my $k (keys %$rule_properties) {
 902         my $h = $rule_properties->{$k};
 903         # copy data, so that we can modify later without side effects
 904         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 905     }
 906
 907     return $properties;
 908 }
 909
 910 sub delete_rule_properties {
 911     my ($rule, $delete_str) = @_;
 912
 913     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 914         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 915             if !defined($rule_properties->{$opt});
 916         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 917             if $opt eq 'type' || $opt eq 'action';
 918         delete $rule->{$opt};
 919     }
 920
 921     return $rule;
 922 }
 923
 924 my $apply_macro = sub {
 925     my ($macro_name, $param, $verify) = @_;
 926
 927     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 928     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 929
 930     my $rules = [];
 931
 932     foreach my $templ (@$macro_rules) {
 933         my $rule = {};
 934         my $param_used = {};
 935         foreach my $k (keys %$templ) {
 936             my $v = $templ->{$k};
 937             if ($v eq 'PARAM') {
 938                 $v = $param->{$k};
 939                 $param_used->{$k} = 1;
 940             } elsif ($v eq 'DEST') {
 941                 $v = $param->{dest};
 942                 $param_used->{dest} = 1;
 943             } elsif ($v eq 'SOURCE') {
 944                 $v = $param->{source};
 945                 $param_used->{source} = 1;
 946             }
 947
 948             if (!defined($v)) {
 949                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 950                 raise_param_exc({ macro => $msg }) if $verify;
 951                 die "$msg\n";
 952             }
 953             $rule->{$k} = $v;
 954         }
 955         foreach my $k (keys %$param) {
 956             next if $k eq 'macro';
 957             next if !defined($param->{$k});
 958             next if $param_used->{$k};
 959             if (defined($rule->{$k})) {
 960                 if ($rule->{$k} ne $param->{$k}) {
 961                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 962                     raise_param_exc({ $k => $msg }) if $verify;
 963                     die "$msg\n";
 964                 }
 965             } else {
 966                 $rule->{$k} = $param->{$k};
 967             }
 968         }
 969         push @$rules, $rule;
 970     }
 971
 972     return $rules;
 973 };
 974
 975 sub verify_rule {
 976     my ($rule, $allow_groups) = @_;
 977
 978     my $type = $rule->{type};
 979
 980     raise_param_exc({ type => "missing property"}) if !$type;
 981     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 982
 983     if ($type eq  'in' || $type eq 'out') {
 984         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 985             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 986     } elsif ($type eq 'group') {
 987         raise_param_exc({ type => "security groups not allowed"})
 988             if !$allow_groups;
 989         raise_param_exc({ action => "invalid characters in security group name"})
 990             if $rule->{action} !~ m/^${security_group_pattern}$/;
 991     } else {
 992         raise_param_exc({ type => "unknown rule type '$type'"});
 993     }
 994
 995     # fixme: verify $rule->{iface}?
 996
 997     if ($rule->{macro}) {
 998         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 999         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1000         $rule->{macro} = $preferred_name;
1001     }
1002
1003     if ($rule->{dport}) {
1004         eval { parse_port_name_number_or_range($rule->{dport}); };
1005         raise_param_exc({ dport => $@ }) if $@;
1006     }
1007
1008     if ($rule->{sport}) {
1009         eval { parse_port_name_number_or_range($rule->{sport}); };
1010         raise_param_exc({ sport => $@ }) if $@;
1011     }
1012
1013     if ($rule->{source}) {
1014         eval { parse_address_list($rule->{source}); };
1015         raise_param_exc({ source => $@ }) if $@;
1016     }
1017
1018     if ($rule->{dest}) {
1019         eval { parse_address_list($rule->{dest}); };
1020         raise_param_exc({ dest => $@ }) if $@;
1021     }
1022
1023     if ($rule->{macro}) {
1024         &$apply_macro($rule->{macro}, $rule, 1);
1025     }
1026
1027     return $rule;
1028 }
1029
1030 sub copy_rule_data {
1031     my ($rule, $param) = @_;
1032
1033     foreach my $k (keys %$rule_properties) {
1034         if (defined(my $v = $param->{$k})) {
1035             if ($v eq '' || $v eq '-') {
1036                 delete $rule->{$k};
1037             } else {
1038                 $rule->{$k} = $v;
1039             }
1040         } else {
1041             delete $rule->{$k};
1042         }
1043     }
1044
1045     # verify rule now
1046
1047     return $rule;
1048 }
1049
1050 # core functions
1051 my $bridge_firewall_enabled = 0;
1052
1053 sub enable_bridge_firewall {
1054
1055     return if $bridge_firewall_enabled; # only once
1056
1057     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1058     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1059
1060     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1061     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1062
1063     $bridge_firewall_enabled = 1;
1064 }
1065
1066 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1067
1068 sub iptables_restore_cmdlist {
1069     my ($cmdlist) = @_;
1070
1071     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1072 }
1073
1074 sub ipset_restore_cmdlist {
1075     my ($cmdlist) = @_;
1076
1077     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1078 }
1079
1080 sub iptables_get_chains {
1081
1082     my $res = {};
1083
1084     # check what chains we want to track
1085     my $is_pvefw_chain = sub {
1086         my $name = shift;
1087
1088         return 1 if $name =~ m/^PVEFW-\S+$/;
1089
1090         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1091
1092         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1093
1094         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1095
1096         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1097         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1098
1099         return undef;
1100     };
1101
1102     my $table = '';
1103
1104     my $hooks = {};
1105
1106     my $parser = sub {
1107         my $line = shift;
1108
1109         return if $line =~ m/^#/;
1110         return if $line =~ m/^\s*$/;
1111
1112         if ($line =~ m/^\*(\S+)$/) {
1113             $table = $1;
1114             return;
1115         }
1116
1117         return if $table ne 'filter';
1118
1119         if ($line =~ m/^:(\S+)\s/) {
1120             my $chain = $1;
1121             return if !&$is_pvefw_chain($chain);
1122             $res->{$chain} = "unknown";
1123         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1124             my ($chain, $sig) = ($1, $2);
1125             return if !&$is_pvefw_chain($chain);
1126             $res->{$chain} = $sig;
1127         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1128             $hooks->{$1} = 1;
1129         } else {
1130             # simply ignore the rest
1131             return;
1132         }
1133     };
1134
1135     run_command("/sbin/iptables-save", outfunc => $parser);
1136
1137     return wantarray ? ($res, $hooks) : $res;
1138 }
1139
1140 sub iptables_chain_digest {
1141     my ($rules) = @_;
1142     my $digest = Digest::SHA->new('sha1');
1143     foreach my $rule (@$rules) { # order is important
1144         $digest->add($rule);
1145     }
1146     return $digest->b64digest;
1147 }
1148
1149 sub ipset_chain_digest {
1150     my ($rules) = @_;
1151
1152     my $digest = Digest::SHA->new('sha1');
1153     foreach my $rule (sort @$rules) { # note: sorted
1154         $digest->add($rule);
1155     }
1156     return $digest->b64digest;
1157 }
1158
1159 sub ipset_get_chains {
1160
1161     my $res = {};
1162     my $chains = {};
1163
1164     my $parser = sub {
1165         my $line = shift;
1166
1167         return if $line =~ m/^#/;
1168         return if $line =~ m/^\s*$/;
1169         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1170             my $chain = $1;
1171             $line =~ s/\s+$//; # delete trailing white space
1172             push @{$chains->{$chain}}, $line;
1173         } else {
1174             # simply ignore the rest
1175             return;
1176         }
1177     };
1178
1179     run_command("/usr/sbin/ipset save", outfunc => $parser);
1180
1181     # compute digest for each chain
1182     foreach my $chain (keys %$chains) {
1183         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1184     }
1185
1186     return $res;
1187 }
1188
1189 sub ruleset_generate_cmdstr {
1190     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1191
1192     return if defined($rule->{enable}) && !$rule->{enable};
1193
1194     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1195
1196     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1197     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1198
1199     my @cmd = ();
1200
1201     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1202     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1203
1204     my $source = $rule->{source};
1205     my $dest = $rule->{dest};
1206
1207     if ($source) {
1208         if ($source =~ m/^(\+)(\S+)$/) {
1209             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1210             push @cmd, "-m set --match-set PVEFW-$2 src";
1211
1212         } elsif ($source =~ m/^${security_group_pattern}$/){
1213             die "no such alias $source" if !$cluster_conf->{aliases}->{$source};
1214             push @cmd, "-s $cluster_conf->{aliases}->{$source}";
1215
1216         } elsif ($source =~ m/\-/){
1217             push @cmd, "-m iprange --src-range $source";
1218
1219         } else {
1220             push @cmd, "-s $source";
1221         }
1222     }
1223
1224     if ($dest) {
1225         if ($dest =~ m/^(\+)(\S+)$/) {
1226             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1227             push @cmd, "-m set --match-set PVEFW-$2 dst";
1228
1229         } elsif ($dest =~ m/^${security_group_pattern}$/){
1230             die "no such alias $dest" if !$cluster_conf->{aliases}->{$dest};
1231             push @cmd, "-d $cluster_conf->{aliases}->{$dest}";
1232
1233         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1234             push @cmd, "-m iprange --dst-range $dest";
1235
1236         } else {
1237             push @cmd, "-d $dest";
1238         }
1239     }
1240
1241     if ($rule->{proto}) {
1242         push @cmd, "-p $rule->{proto}";
1243
1244         my $multiport = 0;
1245         $multiport++ if $nbdport > 1;
1246         $multiport++ if $nbsport > 1;
1247
1248         push @cmd, "--match multiport" if $multiport;
1249
1250         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1251             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1252
1253         if ($rule->{dport}) {
1254             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1255                 # Note: we use dport to store --icmp-type
1256                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1257                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1258             } else {
1259                 if ($nbdport > 1) {
1260                     if ($multiport == 2) {
1261                         push @cmd,  "--ports $rule->{dport}";
1262                     } else {
1263                         push @cmd, "--dports $rule->{dport}";
1264                     }
1265                 } else {
1266                     push @cmd, "--dport $rule->{dport}";
1267                 }
1268             }
1269         }
1270
1271         if ($rule->{sport}) {
1272             if ($nbsport > 1) {
1273                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1274             } else {
1275                 push @cmd, "--sport $rule->{sport}";
1276             }
1277         }
1278     } elsif ($rule->{dport} || $rule->{sport}) {
1279         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1280         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1281     }
1282
1283     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1284
1285     if (my $action = $rule->{action}) {
1286         $action = $actions->{$action} if defined($actions->{$action});
1287         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1288         push @cmd, $goto ? "-g $action" : "-j $action";
1289     }
1290
1291     return scalar(@cmd) ? join(' ', @cmd) : undef;
1292 }
1293
1294 sub ruleset_generate_rule {
1295     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1296
1297     my $rules;
1298
1299     if ($rule->{macro}) {
1300         $rules = &$apply_macro($rule->{macro}, $rule);
1301     } else {
1302         $rules = [ $rule ];
1303     }
1304
1305     foreach my $tmp (@$rules) {
1306         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1307             ruleset_addrule($ruleset, $chain, $cmdstr);
1308         }
1309     }
1310 }
1311
1312 sub ruleset_generate_rule_insert {
1313     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1314
1315     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1316
1317     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1318         ruleset_insertrule($ruleset, $chain, $cmdstr);
1319     }
1320 }
1321
1322 sub ruleset_create_chain {
1323     my ($ruleset, $chain) = @_;
1324
1325     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1326     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1327
1328     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1329
1330     $ruleset->{$chain} = [];
1331 }
1332
1333 sub ruleset_chain_exist {
1334     my ($ruleset, $chain) = @_;
1335
1336     return $ruleset->{$chain} ? 1 : undef;
1337 }
1338
1339 sub ruleset_addrule {
1340    my ($ruleset, $chain, $rule) = @_;
1341
1342    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1343
1344    push @{$ruleset->{$chain}}, "-A $chain $rule";
1345 }
1346
1347 sub ruleset_insertrule {
1348    my ($ruleset, $chain, $rule) = @_;
1349
1350    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1351
1352    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1353 }
1354
1355 sub get_log_rule_base {
1356     my ($chain, $vmid, $msg, $loglevel) = @_;
1357
1358     die "internal error - no log level" if !defined($loglevel);
1359
1360     $vmid = 0 if !defined($vmid);
1361
1362     # Note: we use special format for prefix to pass further
1363     # info to log daemon (VMID, LOGVELEL and CHAIN)
1364
1365     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1366 }
1367
1368 sub ruleset_addlog {
1369     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1370
1371     return if !defined($loglevel);
1372
1373     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1374
1375     $logrule = "$rule $logrule" if defined($rule);
1376
1377     ruleset_addrule($ruleset, $chain, $logrule)
1378 }
1379
1380 sub generate_bridge_chains {
1381     my ($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config) = @_;
1382
1383     my $options = $hostfw_conf->{options} || {};
1384
1385     die "error: detected direct route to bridge '$bridge'\n"
1386         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1387
1388     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1389         ruleset_create_chain($ruleset, "$bridge-FW");
1390         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1391         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1392     }
1393
1394     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1395         ruleset_create_chain($ruleset, "$bridge-OUT");
1396
1397         if($options->{optimize}){
1398             foreach my $interface (@{$bridges_config->{$bridge}}) {
1399                 ruleset_addrule($ruleset, "$bridge-OUT", "-m physdev --physdev-is-bridged --physdev-in $interface -g PVEFW-SET-ACCEPT-MARK");
1400             }
1401         }
1402
1403         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1404         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1405     }
1406
1407     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1408         ruleset_create_chain($ruleset, "$bridge-IN");
1409
1410         if($options->{optimize}){
1411             foreach my $interface (@{$bridges_config->{$bridge}}) {
1412                 ruleset_addrule($ruleset, "$bridge-IN", "-m physdev --physdev-is-bridged --physdev-out $interface -j ACCEPT");
1413             }
1414         }
1415
1416         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1417         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1418         # accept traffic to unmanaged bridge ports
1419         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1420     }
1421 }
1422
1423 sub ruleset_add_chain_policy {
1424     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1425
1426     if ($policy eq 'ACCEPT') {
1427
1428         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1429                               { ACCEPT =>  $accept_action});
1430
1431     } elsif ($policy eq 'DROP') {
1432
1433         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1434
1435         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1436
1437         ruleset_addrule($ruleset, $chain, "-j DROP");
1438     } elsif ($policy eq 'REJECT') {
1439         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1440
1441         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1442
1443         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1444     } else {
1445         # should not happen
1446         die "internal error: unknown policy '$policy'";
1447     }
1448 }
1449
1450 sub ruleset_create_vm_chain {
1451     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1452
1453     ruleset_create_chain($ruleset, $chain);
1454     my $accept = generate_nfqueue($options);
1455
1456     if (!(defined($host_options->{nosmurfs}) && $host_options->{nosmurfs} == 0)) {
1457         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1458     }
1459
1460     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1461         if ($direction eq 'OUT') {
1462             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1463                                                       proto => 'udp', sport => 68, dport => 67 });
1464         } else {
1465             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1466                                                       proto => 'udp', sport => 67, dport => 68 });
1467         }
1468     }
1469
1470     if ($host_options->{tcpflags}) {
1471         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1472     }
1473
1474     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1475     if ($direction eq 'OUT') {
1476         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1477     } else {
1478         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1479     }
1480
1481     if ($direction eq 'OUT') {
1482         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1483             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1484         }
1485         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1486     }
1487 }
1488
1489 sub ruleset_generate_vm_rules {
1490     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1491
1492     my $lc_direction = lc($direction);
1493
1494     foreach my $rule (@$rules) {
1495         next if $rule->{iface} && $rule->{iface} ne $netid;
1496         next if !$rule->{enable};
1497         if ($rule->{type} eq 'group') {
1498             my $group_chain = "GROUP-$rule->{action}-$direction";
1499             if(!ruleset_chain_exist($ruleset, $group_chain)){
1500                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1501             }
1502             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1503             if ($direction eq 'OUT'){
1504                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1505             }else{
1506                 my $accept = generate_nfqueue($options);
1507                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1508             }
1509
1510         } else {
1511             next if $rule->{type} ne $lc_direction;
1512             if ($direction eq 'OUT') {
1513                 ruleset_generate_rule($ruleset, $chain, $rule,
1514                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1515             } else {
1516                 my $accept = generate_nfqueue($options);
1517                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1518             }
1519         }
1520     }
1521 }
1522
1523 sub generate_nfqueue {
1524     my ($options) = @_;
1525
1526     my $action = "";
1527     if($options->{ips}){
1528         $action = "NFQUEUE";
1529         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1530             if(defined($3) && defined($1)) {
1531                 $action .= " --queue-balance $1:$3";
1532             }elsif (defined($1)) {
1533                 $action .= " --queue-num $1";
1534             }
1535         }
1536         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1537     }else{
1538         $action = "ACCEPT";
1539     }
1540
1541     return $action;
1542 }
1543
1544 sub ruleset_generate_vm_ipsrules {
1545     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1546
1547     if ($options->{ips} && $direction eq 'IN') {
1548         my $nfqueue = generate_nfqueue($options);
1549
1550         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1551             ruleset_create_chain($ruleset, "PVEFW-IPS");
1552         }
1553
1554         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1555             ruleset_create_chain($ruleset, "$bridge-IPS");
1556             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1557         }
1558
1559         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1560     }
1561 }
1562
1563 sub generate_venet_rules_direction {
1564     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1565
1566     parse_address_list($ip); # make sure we have a valid $ip list
1567
1568     my $lc_direction = lc($direction);
1569
1570     my $rules = $vmfw_conf->{rules};
1571
1572     my $options = $vmfw_conf->{options};
1573     my $hostfw_options = $vmfw_conf->{options};
1574     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1575
1576     my $chain = "venet0-$vmid-$direction";
1577
1578     ruleset_create_vm_chain($ruleset, $chain, $options, $hostfw_options, undef, $direction);
1579
1580     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1581
1582     # implement policy
1583     my $policy;
1584
1585     if ($direction eq 'OUT') {
1586         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1587     } else {
1588         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1589     }
1590
1591     my $accept = generate_nfqueue($options);
1592     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1593     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1594
1595     # plug into FORWARD, INPUT and OUTPUT chain
1596     if ($direction eq 'OUT') {
1597         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1598             action => $chain,
1599             source => $ip,
1600             iface_in => 'venet0'});
1601
1602         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1603             action => $chain,
1604             source => $ip,
1605             iface_in => 'venet0'});
1606     } else {
1607         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1608             action => $chain,
1609             dest => $ip,
1610             iface_out => 'venet0'});
1611
1612         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1613             action => $chain,
1614             dest => $ip,
1615             iface_out => 'venet0'});
1616     }
1617 }
1618
1619 sub generate_tap_rules_direction {
1620     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1621
1622     my $lc_direction = lc($direction);
1623
1624     my $rules = $vmfw_conf->{rules};
1625
1626     my $options = $vmfw_conf->{options};
1627     my $hostfw_options = $hostfw_conf->{options};
1628     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1629
1630     my $tapchain = "$iface-$direction";
1631
1632     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1633
1634     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1635
1636     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1637
1638     # implement policy
1639     my $policy;
1640
1641     if ($direction eq 'OUT') {
1642         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1643     } else {
1644         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1645     }
1646
1647     my $accept = generate_nfqueue($options);
1648     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1649     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1650
1651     # plug the tap chain to bridge chain
1652     if ($direction eq 'IN') {
1653         ruleset_addrule($ruleset, "$bridge-IN",
1654                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1655     } else {
1656         ruleset_addrule($ruleset, "$bridge-OUT",
1657                            "-m physdev --physdev-in $iface -j $tapchain");
1658     }
1659 }
1660
1661 sub enable_host_firewall {
1662     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1663
1664     my $options = $hostfw_conf->{options};
1665     my $cluster_options = $cluster_conf->{options};
1666     my $rules = $hostfw_conf->{rules};
1667     my $cluster_rules = $cluster_conf->{rules};
1668
1669     # host inbound firewall
1670     my $chain = "PVEFW-HOST-IN";
1671     ruleset_create_chain($ruleset, $chain);
1672
1673     my $loglevel = get_option_log_level($options, "log_level_in");
1674
1675     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1676         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1677     }
1678
1679     if ($options->{tcpflags}) {
1680         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1681     }
1682
1683     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1684     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1685     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1686     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1687     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1688     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1689
1690     # we use RETURN because we need to check also tap rules
1691     my $accept_action = 'RETURN';
1692
1693     # add host rules first, so that cluster wide rules can be overwritten
1694     foreach my $rule (@$rules, @$cluster_rules) {
1695         next if $rule->{type} ne 'in';
1696         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1697     }
1698
1699     # implement input policy
1700     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1701     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1702
1703     # host outbound firewall
1704     $chain = "PVEFW-HOST-OUT";
1705     ruleset_create_chain($ruleset, $chain);
1706
1707     $loglevel = get_option_log_level($options, "log_level_out");
1708
1709     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1710     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1711     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1712     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1713     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1714     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1715
1716     # we use RETURN because we may want to check other thigs later
1717     $accept_action = 'RETURN';
1718
1719     # add host rules first, so that cluster wide rules can be overwritten
1720     foreach my $rule (@$rules, @$cluster_rules) {
1721         next if $rule->{type} ne 'out';
1722         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1723     }
1724
1725     # implement output policy
1726     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1727     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1728
1729     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1730     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1731 }
1732
1733 sub generate_group_rules {
1734     my ($ruleset, $cluster_conf, $group) = @_;
1735     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1736
1737     my $rules = $cluster_conf->{groups}->{$group};
1738
1739     my $chain = "GROUP-${group}-IN";
1740
1741     ruleset_create_chain($ruleset, $chain);
1742     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1743
1744     foreach my $rule (@$rules) {
1745         next if $rule->{type} ne 'in';
1746         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1747     }
1748
1749     $chain = "GROUP-${group}-OUT";
1750
1751     ruleset_create_chain($ruleset, $chain);
1752     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1753
1754     foreach my $rule (@$rules) {
1755         next if $rule->{type} ne 'out';
1756         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1757         # check also other tap rules later
1758         ruleset_generate_rule($ruleset, $chain, $rule,
1759                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1760     }
1761 }
1762
1763 my $MAX_NETS = 32;
1764 my $valid_netdev_names = {};
1765 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1766     $valid_netdev_names->{"net$i"} = 1;
1767 }
1768
1769 sub parse_fw_rule {
1770     my ($line, $need_iface, $allow_groups) = @_;
1771
1772     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1773
1774     # we can add single line comments to the end of the rule
1775     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1776
1777     # we can disable a rule when prefixed with '|'
1778     my $enable = 1;
1779
1780     $enable = 0 if $line =~ s/^\|//;
1781
1782     my @data = split(/\s+/, $line);
1783     my $expected_elements = $need_iface ? 8 : 7;
1784
1785     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1786
1787     if ($need_iface) {
1788         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1789     } else {
1790         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1791     }
1792
1793     die "incomplete rule\n" if ! ($type && $action);
1794
1795     my $macro;
1796
1797     $type = lc($type);
1798
1799     if ($type eq  'in' || $type eq 'out') {
1800         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1801             # OK
1802         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1803             $action = $2;
1804             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1805             die "unknown macro '$1'\n" if !$preferred_name;
1806             $macro = $preferred_name;
1807         } else {
1808             die "unknown action '$action'\n";
1809         }
1810     } elsif ($type eq 'group') {
1811         die "wrong number of rule elements\n" if scalar(@data) != 3;
1812         die "groups disabled\n" if !$allow_groups;
1813
1814         die "invalid characters in group name\n" if $action !~ m/^${security_group_pattern}$/;
1815     } else {
1816         die "unknown rule type '$type'\n";
1817     }
1818
1819     if ($need_iface) {
1820         $iface = undef if $iface && $iface eq '-';
1821     }
1822
1823     $proto = undef if $proto && $proto eq '-';
1824     pve_fw_verify_protocol_spec($proto) if $proto;
1825
1826     $source = undef if $source && $source eq '-';
1827     $dest = undef if $dest && $dest eq '-';
1828
1829     $dport = undef if $dport && $dport eq '-';
1830     $sport = undef if $sport && $sport eq '-';
1831
1832     parse_port_name_number_or_range($dport) if defined($dport);
1833     parse_port_name_number_or_range($sport) if defined($sport);
1834
1835     parse_address_list($source) if $source;
1836     parse_address_list($dest) if $dest;
1837
1838     return {
1839         type => $type,
1840         enable => $enable,
1841         comment => $comment,
1842         action => $action,
1843         macro => $macro,
1844         iface => $iface,
1845         source => $source,
1846         dest => $dest,
1847         proto => $proto,
1848         dport => $dport,
1849         sport => $sport,
1850     };
1851 }
1852
1853 sub parse_vmfw_option {
1854     my ($line) = @_;
1855
1856     my ($opt, $value);
1857
1858     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1859
1860     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1861         $opt = lc($1);
1862         $value = int($2);
1863     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1864         $opt = lc($1);
1865         $value = $2 ? lc($3) : '';
1866     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1867         $opt = lc($1);
1868         $value = uc($3);
1869     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1870         $opt = lc($1);
1871         $value = $2;
1872     } else {
1873         chomp $line;
1874         die "can't parse option '$line'\n"
1875     }
1876
1877     return ($opt, $value);
1878 }
1879
1880 sub parse_hostfw_option {
1881     my ($line) = @_;
1882
1883     my ($opt, $value);
1884
1885     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1886
1887     if ($line =~ m/^(enable|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1888         $opt = lc($1);
1889         $value = int($2);
1890     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1891         $opt = lc($1);
1892         $value = $2 ? lc($3) : '';
1893     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1894         $opt = lc($1);
1895         $value = int($2);
1896     } else {
1897         chomp $line;
1898         die "can't parse option '$line'\n"
1899     }
1900
1901     return ($opt, $value);
1902 }
1903
1904 sub parse_clusterfw_option {
1905     my ($line) = @_;
1906
1907     my ($opt, $value);
1908
1909     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1910         $opt = lc($1);
1911         $value = int($2);
1912     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1913         $opt = lc($1);
1914         $value = uc($3);
1915     } else {
1916         chomp $line;
1917         die "can't parse option '$line'\n"
1918     }
1919
1920     return ($opt, $value);
1921 }
1922
1923 sub parse_clusterfw_alias {
1924     my ($line) = @_;
1925
1926     my ($opt, $value);
1927     if ($line =~ m/^(\S+)\s(\S+)$/) {
1928         $opt = lc($1);
1929         if($2){
1930             $2 =~ s|/32$||;
1931             pve_verify_ipv4_or_cidr($2) if $2;
1932             $value = $2;
1933         }
1934     } else {
1935         chomp $line;
1936         die "can't parse option '$line'\n";
1937     }
1938
1939     return ($opt, $value);
1940 }
1941
1942 sub parse_vm_fw_rules {
1943     my ($filename, $fh) = @_;
1944
1945     my $res = { rules => [], options => {}};
1946
1947     my $section;
1948
1949     while (defined(my $line = <$fh>)) {
1950         next if $line =~ m/^#/;
1951         next if $line =~ m/^\s*$/;
1952
1953         my $linenr = $fh->input_line_number();
1954         my $prefix = "$filename (line $linenr)";
1955
1956         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1957             $section = lc($1);
1958             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1959             next;
1960         }
1961         if (!$section) {
1962             warn "$prefix: skip line - no section";
1963             next;
1964         }
1965
1966         next if !$res->{$section}; # skip undefined section
1967
1968         if ($section eq 'options') {
1969             eval {
1970                 my ($opt, $value) = parse_vmfw_option($line);
1971                 $res->{options}->{$opt} = $value;
1972             };
1973             warn "$prefix: $@" if $@;
1974             next;
1975         }
1976
1977         my $rule;
1978         eval { $rule = parse_fw_rule($line, 1, 1); };
1979         if (my $err = $@) {
1980             warn "$prefix: $err";
1981             next;
1982         }
1983
1984         push @{$res->{$section}}, $rule;
1985     }
1986
1987     return $res;
1988 }
1989
1990 sub parse_host_fw_rules {
1991     my ($filename, $fh) = @_;
1992
1993     my $res = { rules => [], options => {}};
1994
1995     my $section;
1996
1997     while (defined(my $line = <$fh>)) {
1998         next if $line =~ m/^#/;
1999         next if $line =~ m/^\s*$/;
2000
2001         my $linenr = $fh->input_line_number();
2002         my $prefix = "$filename (line $linenr)";
2003
2004         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2005             $section = lc($1);
2006             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2007             next;
2008         }
2009         if (!$section) {
2010             warn "$prefix: skip line - no section";
2011             next;
2012         }
2013
2014         next if !$res->{$section}; # skip undefined section
2015
2016         if ($section eq 'options') {
2017             eval {
2018                 my ($opt, $value) = parse_hostfw_option($line);
2019                 $res->{options}->{$opt} = $value;
2020             };
2021             warn "$prefix: $@" if $@;
2022             next;
2023         }
2024
2025         my $rule;
2026         eval { $rule = parse_fw_rule($line, 1, 1); };
2027         if (my $err = $@) {
2028             warn "$prefix: $err";
2029             next;
2030         }
2031
2032         push @{$res->{$section}}, $rule;
2033     }
2034
2035     return $res;
2036 }
2037
2038 sub parse_cluster_fw_rules {
2039     my ($filename, $fh) = @_;
2040
2041     my $section;
2042     my $group;
2043
2044     my $res = {
2045         rules => [],
2046         options => {},
2047         groups => {},
2048         group_comments => {},
2049         ipset => {} ,
2050         ipset_comments => {},
2051     };
2052
2053     while (defined(my $line = <$fh>)) {
2054         next if $line =~ m/^#/;
2055         next if $line =~ m/^\s*$/;
2056
2057         my $linenr = $fh->input_line_number();
2058         my $prefix = "$filename (line $linenr)";
2059
2060         if ($line =~ m/^\[options\]$/i) {
2061             $section = 'options';
2062             next;
2063         }
2064
2065         if ($line =~ m/^\[aliases\]$/i) {
2066             $section = 'aliases';
2067             next;
2068         }
2069
2070         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2071             $section = 'groups';
2072             $group = lc($1);
2073             my $comment = $2;
2074             $res->{$section}->{$group} = [];
2075             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2076                 if $comment;
2077             next;
2078         }
2079
2080         if ($line =~ m/^\[rules\]$/i) {
2081             $section = 'rules';
2082             next;
2083         }
2084
2085         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2086             $section = 'ipset';
2087             $group = lc($1);
2088             my $comment = $2;
2089             $res->{$section}->{$group} = [];
2090             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2091                 if $comment;
2092             next;
2093         }
2094
2095         if (!$section) {
2096             warn "$prefix: skip line - no section\n";
2097             next;
2098         }
2099
2100         if ($section eq 'options') {
2101             eval {
2102                 my ($opt, $value) = parse_clusterfw_option($line);
2103                 $res->{options}->{$opt} = $value;
2104             };
2105             warn "$prefix: $@" if $@;
2106         } elsif ($section eq 'aliases') {
2107             eval {
2108                 my ($opt, $value) = parse_clusterfw_alias($line);
2109                 $res->{aliases}->{$opt} = $value;
2110             };
2111             warn "$prefix: $@" if $@;
2112         } elsif ($section eq 'rules') {
2113             my $rule;
2114             eval { $rule = parse_fw_rule($line, 1, 1); };
2115             if (my $err = $@) {
2116                 warn "$prefix: $err";
2117                 next;
2118             }
2119             push @{$res->{$section}}, $rule;
2120         } elsif ($section eq 'groups') {
2121             my $rule;
2122             eval { $rule = parse_fw_rule($line, 0, 0); };
2123             if (my $err = $@) {
2124                 warn "$prefix: $err";
2125                 next;
2126             }
2127             push @{$res->{$section}->{$group}}, $rule;
2128         } elsif ($section eq 'ipset') {
2129             # we can add single line comments to the end of the rule
2130             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2131
2132             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2133             my $nomatch = $1;
2134             my $cidr = $2;
2135
2136             if($cidr !~ m/^${security_group_pattern}$/) {
2137                 $cidr =~ s|/32$||;
2138
2139                 eval { pve_verify_ipv4_or_cidr($cidr); };
2140                 if (my $err = $@) {
2141                     warn "$prefix: $cidr - $err";
2142                     next;
2143                 }
2144             }
2145
2146             my $entry = { cidr => $cidr };
2147             $entry->{nomatch} = 1 if $nomatch;
2148             $entry->{comment} = $comment if $comment;
2149
2150             push @{$res->{$section}->{$group}}, $entry;
2151         }
2152     }
2153
2154     return $res;
2155 }
2156
2157 sub run_locked {
2158     my ($code, @param) = @_;
2159
2160     my $timeout = 10;
2161
2162     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2163
2164     die $@ if $@;
2165
2166     return $res;
2167 }
2168
2169 sub read_local_vm_config {
2170
2171     my $openvz = {};
2172     my $qemu = {};
2173
2174     my $vmdata = { openvz => $openvz, qemu => $qemu };
2175
2176     my $vmlist = PVE::Cluster::get_vmlist();
2177     return $vmdata if !$vmlist || !$vmlist->{ids};
2178     my $ids = $vmlist->{ids};
2179
2180     foreach my $vmid (keys %$ids) {
2181         next if !$vmid; # skip VE0
2182         my $d = $ids->{$vmid};
2183         next if !$d->{node} || $d->{node} ne $nodename;
2184         next if !$d->{type};
2185         if ($d->{type} eq 'openvz') {
2186             if ($have_pve_manager) {
2187                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2188                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2189                     $openvz->{$vmid} = $conf;
2190                 }
2191             }
2192         } elsif ($d->{type} eq 'qemu') {
2193             if ($have_qemu_server) {
2194                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2195                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2196                     $qemu->{$vmid} = $conf;
2197                 }
2198             }
2199         }
2200     }
2201
2202     return $vmdata;
2203 };
2204
2205 sub read_bridges_config {
2206
2207     my $bridgehash = {};
2208
2209     dir_glob_foreach('/sys/class/net', 'vmbr(\d+)', sub {
2210         my ($bridge) = @_;
2211
2212         dir_glob_foreach("/sys/class/net/$bridge/brif", '((eth|bond)(\d+)(\.(\d+))?)', sub {
2213             my ($interface) = @_;
2214             push @{$bridgehash->{$bridge}}, $interface;
2215         });
2216     });
2217
2218     return $bridgehash;
2219 };
2220
2221 sub load_vmfw_conf {
2222     my ($vmid) = @_;
2223
2224     my $vmfw_conf = {};
2225
2226     my $filename = "/etc/pve/firewall/$vmid.fw";
2227     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2228         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2229     }
2230
2231     return $vmfw_conf;
2232 }
2233
2234 my $format_rules = sub {
2235     my ($rules, $need_iface) = @_;
2236
2237     my $raw = '';
2238
2239     foreach my $rule (@$rules) {
2240         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2241             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2242             $raw .= uc($rule->{type});
2243             if ($rule->{macro}) {
2244                 $raw .= " $rule->{macro}($rule->{action})";
2245             } else {
2246                 $raw .= " " . $rule->{action};
2247             }
2248             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2249
2250             if ($rule->{type} ne  'group')  {
2251                 $raw .= " " . ($rule->{source} || '-');
2252                 $raw .= " " . ($rule->{dest} || '-');
2253                 $raw .= " " . ($rule->{proto} || '-');
2254                 $raw .= " " . ($rule->{dport} || '-');
2255                 $raw .= " " . ($rule->{sport} || '-');
2256             }
2257
2258             $raw .= " # " . encode('utf8', $rule->{comment})
2259                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2260             $raw .= "\n";
2261         } else {
2262             die "unknown rule type '$rule->{type}'";
2263         }
2264     }
2265
2266     return $raw;
2267 };
2268
2269 my $format_options = sub {
2270     my ($options) = @_;
2271
2272     my $raw = '';
2273
2274     $raw .= "[OPTIONS]\n\n";
2275     foreach my $opt (keys %$options) {
2276         $raw .= "$opt: $options->{$opt}\n";
2277     }
2278     $raw .= "\n";
2279
2280     return $raw;
2281 };
2282
2283 my $format_ipset = sub {
2284     my ($options) = @_;
2285
2286     my $raw = '';
2287
2288     my $nethash = {};
2289     foreach my $entry (@$options) {
2290         $nethash->{$entry->{cidr}} = $entry;
2291     }
2292
2293     foreach my $cidr (sort keys %$nethash) {
2294         my $entry = $nethash->{$cidr};
2295         my $line = $entry->{nomatch} ? '!' : '';
2296         $line .= $entry->{cidr};
2297         $line .= " # " . encode('utf8', $entry->{comment})
2298             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2299         $raw .= "$line\n";
2300     }
2301
2302     return $raw;
2303 };
2304
2305 sub save_vmfw_conf {
2306     my ($vmid, $vmfw_conf) = @_;
2307
2308     my $raw = '';
2309
2310     my $options = $vmfw_conf->{options};
2311     $raw .= &$format_options($options) if scalar(keys %$options);
2312
2313     my $rules = $vmfw_conf->{rules};
2314     if (scalar(@$rules)) {
2315         $raw .= "[RULES]\n\n";
2316         $raw .= &$format_rules($rules, 1);
2317         $raw .= "\n";
2318     }
2319
2320     my $filename = "/etc/pve/firewall/$vmid.fw";
2321     PVE::Tools::file_set_contents($filename, $raw);
2322 }
2323
2324 sub read_vm_firewall_configs {
2325     my ($vmdata) = @_;
2326     my $vmfw_configs = {};
2327
2328     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2329         my $vmfw_conf = load_vmfw_conf($vmid);
2330         next if !$vmfw_conf->{options}; # skip if file does not exists
2331         $vmfw_configs->{$vmid} = $vmfw_conf;
2332     }
2333
2334     return $vmfw_configs;
2335 }
2336
2337 sub get_option_log_level {
2338     my ($options, $k) = @_;
2339
2340     my $v = $options->{$k};
2341     $v = $default_log_level if !defined($v);
2342
2343     return undef if $v eq '' || $v eq 'nolog';
2344
2345     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2346
2347     return $v if ($v >= 0) && ($v <= 7);
2348
2349     warn "unknown log level ($k = '$v')\n";
2350
2351     return undef;
2352 }
2353
2354 sub generate_std_chains {
2355     my ($ruleset, $options) = @_;
2356
2357     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2358
2359     # same as shorewall smurflog.
2360     my $chain = 'PVEFW-smurflog';
2361     $pve_std_chains->{$chain} = [];
2362
2363     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2364     push @{$pve_std_chains->{$chain}}, "-j DROP";
2365
2366     # same as shorewall logflags action.
2367     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2368     $chain = 'PVEFW-logflags';
2369     $pve_std_chains->{$chain} = [];
2370
2371     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2372     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2373     push @{$pve_std_chains->{$chain}}, "-j DROP";
2374
2375     foreach my $chain (keys %$pve_std_chains) {
2376         ruleset_create_chain($ruleset, $chain);
2377         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2378             if (ref($rule)) {
2379                 ruleset_generate_rule($ruleset, $chain, $rule);
2380             } else {
2381                 ruleset_addrule($ruleset, $chain, $rule);
2382             }
2383         }
2384     }
2385 }
2386
2387 sub generate_ipset_chains {
2388     my ($ipset_ruleset, $fw_conf) = @_;
2389
2390     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2391         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2392     }
2393 }
2394
2395 sub generate_ipset {
2396     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2397
2398     my $hashsize = scalar(@$options);
2399     if ($hashsize <= 64) {
2400         $hashsize = 64;
2401     } else {
2402         $hashsize = round_powerof2($hashsize);
2403     }
2404
2405     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2406
2407     # remove duplicates
2408     my $nethash = {};
2409     foreach my $entry (@$options) {
2410         my $cidr = $entry->{cidr};
2411         #check aliases
2412         if ($cidr =~ m/^${security_group_pattern}$/){
2413             die "no such alias $cidr" if !$aliases->{$cidr};
2414             $entry->{cidr} = $aliases->{$cidr};
2415         }
2416         $nethash->{$entry->{cidr}} = $entry;
2417     }
2418
2419     foreach my $cidr (sort keys %$nethash) {
2420         my $entry = $nethash->{$cidr};
2421
2422         my $cmd = "add $name $cidr";
2423         if ($entry->{nomatch}) {
2424             if ($feature_ipset_nomatch) {
2425                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2426             } else {
2427                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2428             }
2429         } else {
2430             push @{$ipset_ruleset->{$name}}, $cmd;
2431         }
2432     }
2433 }
2434
2435 sub round_powerof2 {
2436     my ($int) = @_;
2437
2438     $int--;
2439     $int |= $int >> $_ foreach (1,2,4,8,16);
2440     return ++$int;
2441 }
2442
2443 sub save_pvefw_status {
2444     my ($status) = @_;
2445
2446     die "unknown status '$status' - internal error"
2447         if $status !~ m/^(stopped|active)$/;
2448
2449     mkdir dirname($pve_fw_status_filename);
2450     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2451 }
2452
2453 sub read_pvefw_status {
2454
2455     my $status = 'unknown';
2456
2457     return 'stopped' if ! -f $pve_fw_status_filename;
2458
2459     eval {
2460         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2461     };
2462     warn $@ if $@;
2463
2464     return $status;
2465 }
2466
2467 # fixme: move to pve-common PVE::ProcFSTools
2468 sub read_proc_net_route {
2469     my $filename = "/proc/net/route";
2470
2471     my $res = {};
2472
2473     my $fh = IO::File->new ($filename, "r");
2474     return $res if !$fh;
2475
2476     my $int_to_quad = sub {
2477         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2478     };
2479
2480     while (defined(my $line = <$fh>)) {
2481         next if $line =~/^Iface\s+Destination/; # skip head
2482         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2483         push @{$res->{$iface}}, {
2484             dest => &$int_to_quad(hex($dest)),
2485             gateway => &$int_to_quad(hex($gateway)),
2486             mask => &$int_to_quad(hex($mask)),
2487             metric => $metric,
2488             mtu => $mtu,
2489         };
2490     }
2491
2492     return $res;
2493 }
2494
2495 sub load_clusterfw_conf {
2496
2497     my $cluster_conf = {};
2498      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2499         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2500     }
2501
2502     return $cluster_conf;
2503 }
2504
2505 sub save_clusterfw_conf {
2506     my ($cluster_conf) = @_;
2507
2508     my $raw = '';
2509
2510     my $options = $cluster_conf->{options};
2511     $raw .= &$format_options($options) if scalar(keys %$options);
2512
2513     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2514         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2515             my $utf8comment = encode('utf8', $comment);
2516             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2517         } else {
2518             $raw .= "[IPSET $ipset]\n\n";
2519         }
2520         my $options = $cluster_conf->{ipset}->{$ipset};
2521         $raw .= &$format_ipset($options);
2522         $raw .= "\n";
2523     }
2524
2525     my $rules = $cluster_conf->{rules};
2526     if (scalar(@$rules)) {
2527         $raw .= "[RULES]\n\n";
2528         $raw .= &$format_rules($rules, 1);
2529         $raw .= "\n";
2530     }
2531
2532     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2533         my $rules = $cluster_conf->{groups}->{$group};
2534         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2535             my $utf8comment = encode('utf8', $comment);
2536             $raw .= "[group $group] # $utf8comment\n\n";
2537         } else {
2538             $raw .= "[group $group]\n\n";
2539         }
2540
2541         $raw .= &$format_rules($rules, 0);
2542         $raw .= "\n";
2543     }
2544
2545     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2546 }
2547
2548 sub load_hostfw_conf {
2549
2550     my $hostfw_conf = {};
2551     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2552         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2553     }
2554     return $hostfw_conf;
2555 }
2556
2557 sub save_hostfw_conf {
2558     my ($hostfw_conf) = @_;
2559
2560     my $raw = '';
2561
2562     my $options = $hostfw_conf->{options};
2563     $raw .= &$format_options($options) if scalar(keys %$options);
2564
2565     my $rules = $hostfw_conf->{rules};
2566     if (scalar(@$rules)) {
2567         $raw .= "[RULES]\n\n";
2568         $raw .= &$format_rules($rules, 1);
2569         $raw .= "\n";
2570     }
2571
2572     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2573 }
2574
2575 sub compile {
2576     my ($cluster_conf, $hostfw_conf) = @_;
2577
2578     $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2579     $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2580
2581     my $vmdata = read_local_vm_config();
2582     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2583
2584     my $routing_table = read_proc_net_route();
2585
2586     my $bridges_config = read_bridges_config();
2587
2588     my $ipset_ruleset = {};
2589     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2590
2591     my $ruleset = {};
2592
2593     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2594     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2595
2596     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2597
2598     my $hostfw_options = $hostfw_conf->{options} || {};
2599
2600     generate_std_chains($ruleset, $hostfw_options);
2601
2602     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2603
2604     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2605
2606     # generate firewall rules for QEMU VMs
2607     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2608         my $conf = $vmdata->{qemu}->{$vmid};
2609         my $vmfw_conf = $vmfw_configs->{$vmid};
2610         next if !$vmfw_conf;
2611         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2612
2613         foreach my $netid (keys %$conf) {
2614             next if $netid !~ m/^net(\d+)$/;
2615             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2616             next if !$net;
2617             my $iface = "tap${vmid}i$1";
2618
2619             my $bridge = $net->{bridge};
2620             next if !$bridge; # fixme: ?
2621
2622             $bridge .= "v$net->{tag}" if $net->{tag};
2623
2624             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2625
2626             my $macaddr = $net->{macaddr};
2627             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2628                                          $vmfw_conf, $vmid, $bridge, 'IN');
2629             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2630                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2631         }
2632     }
2633
2634     # generate firewall rules for OpenVZ containers
2635     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2636         my $conf = $vmdata->{openvz}->{$vmid};
2637
2638         my $vmfw_conf = $vmfw_configs->{$vmid};
2639         next if !$vmfw_conf;
2640         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2641
2642         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2643             my $ip = $conf->{ip_address}->{value};
2644             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2645             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2646         }
2647
2648         if ($conf->{netif} && $conf->{netif}->{value}) {
2649             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2650             foreach my $netid (keys %$netif) {
2651                 my $d = $netif->{$netid};
2652                 my $bridge = $d->{bridge};
2653                 if (!$bridge) {
2654                     warn "no bridge device for CT $vmid iface '$netid'\n";
2655                     next; # fixme?
2656                 }
2657
2658                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table, $bridges_config);
2659
2660                 my $macaddr = $d->{mac};
2661                 my $iface = $d->{host_ifname};
2662                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2663                                              $vmfw_conf, $vmid, $bridge, 'IN');
2664                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2665                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2666             }
2667         }
2668     }
2669
2670     if($hostfw_options->{optimize}){
2671
2672         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2673         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2674         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2675     }
2676
2677     # fixme: what log level should we use here?
2678     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2679
2680     # fixme: should we really block inter-bridge traffic?
2681
2682     # always allow traffic from containers?
2683     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2684
2685     # disable interbridge routing
2686     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2687     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2688     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2689     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2690     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2691     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2692
2693     return ($ruleset, $ipset_ruleset);
2694 }
2695
2696 sub get_ruleset_status {
2697     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2698
2699     my $statushash = {};
2700
2701     foreach my $chain (sort keys %$ruleset) {
2702         my $sig = &$digest_fn($ruleset->{$chain});
2703
2704         $statushash->{$chain}->{sig} = $sig;
2705
2706         my $oldsig = $active_chains->{$chain};
2707         if (!defined($oldsig)) {
2708             $statushash->{$chain}->{action} = 'create';
2709         } else {
2710             if ($oldsig eq $sig) {
2711                 $statushash->{$chain}->{action} = 'exists';
2712             } else {
2713                 $statushash->{$chain}->{action} = 'update';
2714             }
2715         }
2716         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2717         foreach my $cmd (@{$ruleset->{$chain}}) {
2718             print "\t$cmd\n" if $verbose;
2719         }
2720     }
2721
2722     foreach my $chain (sort keys %$active_chains) {
2723         if (!defined($ruleset->{$chain})) {
2724             my $sig = $active_chains->{$chain};
2725             $statushash->{$chain}->{action} = 'delete';
2726             $statushash->{$chain}->{sig} = $sig;
2727             print "delete $chain ($sig)\n" if $verbose;
2728         }
2729     }
2730
2731     return $statushash;
2732 }
2733
2734 sub print_sig_rule {
2735     my ($chain, $sig) = @_;
2736
2737     # We just use this to store a SHA1 checksum used to detect changes
2738     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2739 }
2740
2741 sub get_ruleset_cmdlist {
2742     my ($ruleset, $verbose) = @_;
2743
2744     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2745
2746     my ($active_chains, $hooks) = iptables_get_chains();
2747     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2748
2749     # create missing chains first
2750     foreach my $chain (sort keys %$ruleset) {
2751         my $stat = $statushash->{$chain};
2752         die "internal error" if !$stat;
2753         next if $stat->{action} ne 'create';
2754
2755         $cmdlist .= ":$chain - [0:0]\n";
2756     }
2757
2758     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2759         if (!$hooks->{$h}) {
2760             $cmdlist .= "-A $h -j PVEFW-$h\n";
2761         }
2762     }
2763
2764     foreach my $chain (sort keys %$ruleset) {
2765         my $stat = $statushash->{$chain};
2766         die "internal error" if !$stat;
2767
2768         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2769             $cmdlist .= "-F $chain\n";
2770             foreach my $cmd (@{$ruleset->{$chain}}) {
2771                 $cmdlist .= "$cmd\n";
2772             }
2773             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2774         } elsif ($stat->{action} eq 'delete') {
2775             die "internal error"; # this should not happen
2776         } elsif ($stat->{action} eq 'exists') {
2777             # do nothing
2778         } else {
2779             die "internal error - unknown status '$stat->{action}'";
2780         }
2781     }
2782
2783     foreach my $chain (keys %$statushash) {
2784         next if $statushash->{$chain}->{action} ne 'delete';
2785         $cmdlist .= "-F $chain\n";
2786     }
2787     foreach my $chain (keys %$statushash) {
2788         next if $statushash->{$chain}->{action} ne 'delete';
2789         next if $chain eq 'PVEFW-INPUT';
2790         next if $chain eq 'PVEFW-OUTPUT';
2791         next if $chain eq 'PVEFW-FORWARD';
2792         $cmdlist .= "-X $chain\n";
2793     }
2794
2795     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2796
2797     $cmdlist .= "COMMIT\n";
2798
2799     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2800 }
2801
2802 sub get_ipset_cmdlist {
2803     my ($ruleset, $verbose) = @_;
2804
2805     my $cmdlist = "";
2806
2807     my $delete_cmdlist = "";
2808
2809     my $active_chains = ipset_get_chains();
2810     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2811
2812     # remove stale _swap chains
2813     foreach my $chain (keys %$active_chains) {
2814         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2815             $cmdlist .= "destroy $chain\n";
2816         }
2817     }
2818
2819     foreach my $chain (sort keys %$ruleset) {
2820         my $stat = $statushash->{$chain};
2821         die "internal error" if !$stat;
2822
2823         if ($stat->{action} eq 'create') {
2824             foreach my $cmd (@{$ruleset->{$chain}}) {
2825                 $cmdlist .= "$cmd\n";
2826             }
2827         }
2828
2829         if ($stat->{action} eq 'update') {
2830             my $chain_swap = $chain."_swap";
2831
2832             foreach my $cmd (@{$ruleset->{$chain}}) {
2833                 $cmd =~ s/$chain/$chain_swap/;
2834                 $cmdlist .= "$cmd\n";
2835             }
2836             $cmdlist .= "swap $chain_swap $chain\n";
2837             $cmdlist .= "flush $chain_swap\n";
2838             $cmdlist .= "destroy $chain_swap\n";
2839         }
2840
2841     }
2842
2843     foreach my $chain (keys %$statushash) {
2844         next if $statushash->{$chain}->{action} ne 'delete';
2845
2846         $delete_cmdlist .= "flush $chain\n";
2847         $delete_cmdlist .= "destroy $chain\n";
2848     }
2849
2850     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2851
2852     return ($cmdlist, $delete_cmdlist, $changes);
2853 }
2854
2855 sub apply_ruleset {
2856     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2857
2858     enable_bridge_firewall();
2859
2860     update_nf_conntrack_max($hostfw_conf);
2861
2862     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2863
2864     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2865         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2866
2867     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2868
2869     if ($verbose) {
2870         if ($ipset_changes) {
2871             print "ipset changes:\n";
2872             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2873             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2874         }
2875
2876         if ($changes) {
2877             print "iptables changes:\n";
2878             print $cmdlist;
2879         }
2880     }
2881
2882     ipset_restore_cmdlist($ipset_create_cmdlist);
2883
2884     iptables_restore_cmdlist($cmdlist);
2885
2886     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2887
2888     # test: re-read status and check if everything is up to date
2889     my $active_chains = iptables_get_chains();
2890     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2891
2892     my $errors;
2893     foreach my $chain (sort keys %$ruleset) {
2894         my $stat = $statushash->{$chain};
2895         if ($stat->{action} ne 'exists') {
2896             warn "unable to update chain '$chain'\n";
2897             $errors = 1;
2898         }
2899     }
2900
2901     die "unable to apply firewall changes\n" if $errors;
2902 }
2903
2904 sub update_nf_conntrack_max {
2905     my ($hostfw_conf) = @_;
2906
2907     my $max = 65536; # reasonable default
2908
2909     my $options = $hostfw_conf->{options} || {};
2910
2911     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2912         $max = $options->{nf_conntrack_max};
2913         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2914     }
2915
2916     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2917     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2918
2919     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2920
2921     if ($current != $max) {
2922         my $hashsize = int($max/4);
2923         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2924         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2925     }
2926 }
2927
2928 sub update_nf_conntrack_tcp_timeout_established {
2929     my ($hostfw_conf) = @_;
2930
2931     my $options = $hostfw_conf->{options} || {};
2932
2933     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2934
2935     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2936 }
2937
2938 sub remove_pvefw_chains {
2939
2940     my ($chash, $hooks) = iptables_get_chains();
2941     my $cmdlist = "*filter\n";
2942
2943     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2944         if ($hooks->{$h}) {
2945             $cmdlist .= "-D $h -j PVEFW-$h\n";
2946         }
2947     }
2948
2949     foreach my $chain (keys %$chash) {
2950         $cmdlist .= "-F $chain\n";
2951     }
2952
2953     foreach my $chain (keys %$chash) {
2954         $cmdlist .= "-X $chain\n";
2955     }
2956     $cmdlist .= "COMMIT\n";
2957
2958     iptables_restore_cmdlist($cmdlist);
2959 }
2960
2961 sub update {
2962     my ($start, $verbose) = @_;
2963
2964     my $code = sub {
2965
2966         my $cluster_conf = load_clusterfw_conf();
2967         my $cluster_options = $cluster_conf->{options};
2968
2969         my $enable = $cluster_options->{enable};
2970
2971         my $status = read_pvefw_status();
2972
2973         die "Firewall is disabled - cannot start\n" if !$enable && $start;
2974
2975         if (!$enable) {
2976             PVE::Firewall::remove_pvefw_chains();
2977             print "Firewall disabled\n" if $verbose;
2978             return;
2979         }
2980
2981         my $hostfw_conf = load_hostfw_conf();
2982
2983         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2984
2985         if ($start || $status eq 'active') {
2986
2987             save_pvefw_status('active') if ($status ne 'active');
2988
2989             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2990         } else {
2991             print "Firewall not active (status = $status)\n" if $verbose;
2992         }
2993     };
2994
2995     run_locked($code);
2996 }
2997
2998
2999 1;