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-alias', {
  60     description => "Alias name.",
  61     type => 'string',
  62     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  63     minLength => 2,
  64     maxLength => 20,
  65 });
  66
  67 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
  68     description => "Log level.",
  69     type => 'string',
  70     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
  71     optional => 1,
  72 });
  73
  74 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  75 my $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  76
  77 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
  78     description => "Security Group name.",
  79     type => 'string',
  80     pattern => $security_group_name_pattern,
  81     minLength => 2,
  82     maxLength => 20,
  83 });
  84
  85 my $feature_ipset_nomatch = 0;
  86 eval  {
  87     my (undef, undef, $release) = POSIX::uname();
  88     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  89         my ($major, $minor) = ($1, $2);
  90         $feature_ipset_nomatch = 1 if ($major > 3) ||
  91             ($major == 3 && $minor >= 7);
  92     }
  93
  94 };
  95
  96 use Data::Dumper;
  97
  98 my $nodename = PVE::INotify::nodename();
  99
 100 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 101
 102 my $default_log_level = 'info';
 103
 104 my $log_level_hash = {
 105     debug => 7,
 106     info => 6,
 107     notice => 5,
 108     warning => 4,
 109     err => 3,
 110     crit => 2,
 111     alert => 1,
 112     emerg => 0,
 113 };
 114
 115 # imported/converted from: /usr/share/shorewall/macro.*
 116 my $pve_fw_macros = {
 117     'Amanda' => [
 118         "Amanda Backup",
 119         { action => 'PARAM', proto => 'udp', dport => '10080' },
 120         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 121     ],
 122     'Auth' => [
 123         "Auth (identd) traffic",
 124         { action => 'PARAM', proto => 'tcp', dport => '113' },
 125     ],
 126     'BGP' => [
 127         "Border Gateway Protocol traffic",
 128         { action => 'PARAM', proto => 'tcp', dport => '179' },
 129     ],
 130     'BitTorrent' => [
 131         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 132         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 133         { action => 'PARAM', proto => 'udp', dport => '6881' },
 134     ],
 135     'BitTorrent32' => [
 136         "BitTorrent traffic for BitTorrent 3.2 and later",
 137         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 138         { action => 'PARAM', proto => 'udp', dport => '6881' },
 139     ],
 140     'CVS' => [
 141         "Concurrent Versions System pserver traffic",
 142         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 143     ],
 144     'Citrix' => [
 145         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 146         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 147         { action => 'PARAM', proto => 'udp', dport => '1604' },
 148         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 149     ],
 150     'DAAP' => [
 151         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 152         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 153         { action => 'PARAM', proto => 'udp', dport => '3689' },
 154     ],
 155     'DCC' => [
 156         "Distributed Checksum Clearinghouse spam filtering mechanism",
 157         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 158     ],
 159     'DHCPfwd' => [
 160         "Forwarded DHCP traffic (bidirectional)",
 161         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 162         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 163     ],
 164     'DNS' => [
 165         "Domain Name System traffic (upd and tcp)",
 166         { action => 'PARAM', proto => 'udp', dport => '53' },
 167         { action => 'PARAM', proto => 'tcp', dport => '53' },
 168     ],
 169     'Distcc' => [
 170         "Distributed Compiler service",
 171         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 172     ],
 173     'FTP' => [
 174         "File Transfer Protocol",
 175         { action => 'PARAM', proto => 'tcp', dport => '21' },
 176     ],
 177     'Finger' => [
 178         "Finger protocol (RFC 742)",
 179         { action => 'PARAM', proto => 'tcp', dport => '79' },
 180     ],
 181     'GNUnet' => [
 182         "GNUnet secure peer-to-peer networking traffic",
 183         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 184         { action => 'PARAM', proto => 'udp', dport => '2086' },
 185         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 186         { action => 'PARAM', proto => 'udp', dport => '1080' },
 187     ],
 188     'GRE' => [
 189         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 190         { action => 'PARAM', proto => '47' },
 191         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 192     ],
 193     'Git' => [
 194         "Git distributed revision control traffic",
 195         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 196     ],
 197     'HKP' => [
 198         "OpenPGP HTTP keyserver protocol traffic",
 199         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 200     ],
 201     'HTTP' => [
 202         "Hypertext Transfer Protocol (WWW)",
 203         { action => 'PARAM', proto => 'tcp', dport => '80' },
 204     ],
 205     'HTTPS' => [
 206         "Hypertext Transfer Protocol (WWW) over SSL",
 207         { action => 'PARAM', proto => 'tcp', dport => '443' },
 208     ],
 209     'ICPV2' => [
 210         "Internet Cache Protocol V2 (Squid) traffic",
 211         { action => 'PARAM', proto => 'udp', dport => '3130' },
 212     ],
 213     'ICQ' => [
 214         "AOL Instant Messenger traffic",
 215         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 216     ],
 217     'IMAP' => [
 218         "Internet Message Access Protocol",
 219         { action => 'PARAM', proto => 'tcp', dport => '143' },
 220     ],
 221     'IMAPS' => [
 222         "Internet Message Access Protocol over SSL",
 223         { action => 'PARAM', proto => 'tcp', dport => '993' },
 224     ],
 225     'IPIP' => [
 226         "IPIP capsulation traffic (bidirectional)",
 227         { action => 'PARAM', proto => '94' },
 228         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 229     ],
 230     'IPsec' => [
 231         "IPsec traffic (bidirectional)",
 232         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 233         { action => 'PARAM', proto => '50' },
 234         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 235         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 236     ],
 237     'IPsecah' => [
 238         "IPsec authentication (AH) traffic (bidirectional)",
 239         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 240         { action => 'PARAM', proto => '51' },
 241         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 242         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 243     ],
 244     'IPsecnat' => [
 245         "IPsec traffic and Nat-Traversal (bidirectional)",
 246         { action => 'PARAM', proto => 'udp', dport => '500' },
 247         { action => 'PARAM', proto => 'udp', dport => '4500' },
 248         { action => 'PARAM', proto => '50' },
 249         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 250         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 251         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 252     ],
 253     'IRC' => [
 254         "Internet Relay Chat traffic",
 255         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 256     ],
 257     'Jetdirect' => [
 258         "HP Jetdirect printing",
 259         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 260     ],
 261     'L2TP' => [
 262         "Layer 2 Tunneling Protocol traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '1701' },
 264         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 265     ],
 266     'LDAP' => [
 267         "Lightweight Directory Access Protocol traffic",
 268         { action => 'PARAM', proto => 'tcp', dport => '389' },
 269     ],
 270     'LDAPS' => [
 271         "Secure Lightweight Directory Access Protocol traffic",
 272         { action => 'PARAM', proto => 'tcp', dport => '636' },
 273     ],
 274     'MSNP' => [
 275         "Microsoft Notification Protocol",
 276         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 277     ],
 278     'MSSQL' => [
 279         "Microsoft SQL Server",
 280         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 281     ],
 282     'Mail' => [
 283         "Mail traffic (SMTP, SMTPS, Submission)",
 284         { action => 'PARAM', proto => 'tcp', dport => '25' },
 285         { action => 'PARAM', proto => 'tcp', dport => '465' },
 286         { action => 'PARAM', proto => 'tcp', dport => '587' },
 287     ],
 288     'Munin' => [
 289         "Munin networked resource monitoring traffic",
 290         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 291     ],
 292     'MySQL' => [
 293         "MySQL server",
 294         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 295     ],
 296     'NNTP' => [
 297         "NNTP traffic (Usenet).",
 298         { action => 'PARAM', proto => 'tcp', dport => '119' },
 299     ],
 300     'NNTPS' => [
 301         "Encrypted NNTP traffic (Usenet)",
 302         { action => 'PARAM', proto => 'tcp', dport => '563' },
 303     ],
 304     'NTP' => [
 305         "Network Time Protocol (ntpd)",
 306         { action => 'PARAM', proto => 'udp', dport => '123' },
 307     ],
 308     'NTPbi' => [
 309         "Bi-directional NTP (for NTP peers)",
 310         { action => 'PARAM', proto => 'udp', dport => '123' },
 311         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 312     ],
 313     'OSPF' => [
 314         "OSPF multicast traffic",
 315         { action => 'PARAM', proto => '89' },
 316     ],
 317     'OpenVPN' => [
 318         "OpenVPN traffic",
 319         { action => 'PARAM', proto => 'udp', dport => '1194' },
 320     ],
 321     'PCA' => [
 322         "Symantec PCAnywere (tm)",
 323         { action => 'PARAM', proto => 'udp', dport => '5632' },
 324         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 325     ],
 326     'POP3' => [
 327         "POP3 traffic",
 328         { action => 'PARAM', proto => 'tcp', dport => '110' },
 329     ],
 330     'POP3S' => [
 331         "Encrypted POP3 traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '995' },
 333     ],
 334     'PPtP' => [
 335         "Point-to-Point Tunneling Protocol",
 336         { action => 'PARAM', proto => '47' },
 337         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 338         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 339     ],
 340     'Ping' => [
 341         "ICMP echo request",
 342         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 343     ],
 344     'PostgreSQL' => [
 345         "PostgreSQL server",
 346         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 347     ],
 348     'Printer' => [
 349         "Line Printer protocol printing",
 350         { action => 'PARAM', proto => 'tcp', dport => '515' },
 351     ],
 352     'RDP' => [
 353         "Microsoft Remote Desktop Protocol traffic",
 354         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 355     ],
 356     'RIPbi' => [
 357         "Routing Information Protocol (bidirectional)",
 358         { action => 'PARAM', proto => 'udp', dport => '520' },
 359         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 360     ],
 361     'RNDC' => [
 362         "BIND remote management protocol",
 363         { action => 'PARAM', proto => 'tcp', dport => '953' },
 364     ],
 365     'Razor' => [
 366         "Razor Antispam System",
 367         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 368     ],
 369     'Rdate' => [
 370         "Remote time retrieval (rdate)",
 371         { action => 'PARAM', proto => 'tcp', dport => '37' },
 372     ],
 373     'Rsync' => [
 374         "Rsync server",
 375         { action => 'PARAM', proto => 'tcp', dport => '873' },
 376     ],
 377     'SANE' => [
 378         "SANE network scanning",
 379         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 380     ],
 381     'SMB' => [
 382         "Microsoft SMB traffic",
 383         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 384         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 385         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 386         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 387     ],
 388     'SMBBI' => [
 389         "Microsoft SMB traffic (bidirectional)",
 390         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 391         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 392         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 393         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 394         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 395         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 396         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 397         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 398     ],
 399     'SMBswat' => [
 400         "Samba Web Administration Tool",
 401         { action => 'PARAM', proto => 'tcp', dport => '901' },
 402     ],
 403     'SMTP' => [
 404         "Simple Mail Transfer Protocol",
 405         { action => 'PARAM', proto => 'tcp', dport => '25' },
 406     ],
 407     'SMTPS' => [
 408         "Encrypted Simple Mail Transfer Protocol",
 409         { action => 'PARAM', proto => 'tcp', dport => '465' },
 410     ],
 411     'SNMP' => [
 412         "Simple Network Management Protocol",
 413         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 414         { action => 'PARAM', proto => 'tcp', dport => '161' },
 415     ],
 416     'SPAMD' => [
 417         "Spam Assassin SPAMD traffic",
 418         { action => 'PARAM', proto => 'tcp', dport => '783' },
 419     ],
 420     'SSH' => [
 421         "Secure shell traffic",
 422         { action => 'PARAM', proto => 'tcp', dport => '22' },
 423     ],
 424     'SVN' => [
 425         "Subversion server (svnserve)",
 426         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 427     ],
 428     'SixXS' => [
 429         "SixXS IPv6 Deployment and Tunnel Broker",
 430         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 431         { action => 'PARAM', proto => 'udp', dport => '3740' },
 432         { action => 'PARAM', proto => '41' },
 433         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 434     ],
 435     'Squid' => [
 436         "Squid web proxy traffic",
 437         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 438     ],
 439     'Submission' => [
 440         "Mail message submission traffic",
 441         { action => 'PARAM', proto => 'tcp', dport => '587' },
 442     ],
 443     'Syslog' => [
 444         "Syslog protocol (RFC 5424) traffic",
 445         { action => 'PARAM', proto => 'udp', dport => '514' },
 446         { action => 'PARAM', proto => 'tcp', dport => '514' },
 447     ],
 448     'TFTP' => [
 449         "Trivial File Transfer Protocol traffic",
 450         { action => 'PARAM', proto => 'udp', dport => '69' },
 451     ],
 452     'Telnet' => [
 453         "Telnet traffic",
 454         { action => 'PARAM', proto => 'tcp', dport => '23' },
 455     ],
 456     'Telnets' => [
 457         "Telnet over SSL",
 458         { action => 'PARAM', proto => 'tcp', dport => '992' },
 459     ],
 460     'Time' => [
 461         "RFC 868 Time protocol",
 462         { action => 'PARAM', proto => 'tcp', dport => '37' },
 463     ],
 464     'Trcrt' => [
 465         "Traceroute (for up to 30 hops) traffic",
 466         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 467         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 468     ],
 469     'VNC' => [
 470         "VNC traffic for VNC display's 0 - 9",
 471         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 472     ],
 473     'VNCL' => [
 474         "VNC traffic from Vncservers to Vncviewers in listen mode",
 475         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 476     ],
 477     'Web' => [
 478         "WWW traffic (HTTP and HTTPS)",
 479         { action => 'PARAM', proto => 'tcp', dport => '80' },
 480         { action => 'PARAM', proto => 'tcp', dport => '443' },
 481     ],
 482     'Webcache' => [
 483         "Web Cache/Proxy traffic (port 8080)",
 484         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 485     ],
 486     'Webmin' => [
 487         "Webmin traffic",
 488         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 489     ],
 490     'Whois' => [
 491         "Whois (nicname, RFC 3912) traffic",
 492         { action => 'PARAM', proto => 'tcp', dport => '43' },
 493     ],
 494 };
 495
 496 my $pve_fw_parsed_macros;
 497 my $pve_fw_macro_descr;
 498 my $pve_fw_preferred_macro_names = {};
 499
 500 my $pve_std_chains = {
 501     'PVEFW-SET-ACCEPT-MARK' => [
 502         "-j MARK --set-mark 1",
 503     ],
 504     'PVEFW-DropBroadcast' => [
 505         # same as shorewall 'Broadcast'
 506         # simply DROP BROADCAST/MULTICAST/ANYCAST
 507         # we can use this to reduce logging
 508         { action => 'DROP', dsttype => 'BROADCAST' },
 509         { action => 'DROP', dsttype => 'MULTICAST' },
 510         { action => 'DROP', dsttype => 'ANYCAST' },
 511         { action => 'DROP', dest => '224.0.0.0/4' },
 512     ],
 513     'PVEFW-reject' => [
 514         # same as shorewall 'reject'
 515         { action => 'DROP', dsttype => 'BROADCAST' },
 516         { action => 'DROP', source => '224.0.0.0/4' },
 517         { action => 'DROP', proto => 'icmp' },
 518         "-p tcp -j REJECT --reject-with tcp-reset",
 519         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 520         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 521         "-j REJECT --reject-with icmp-host-prohibited",
 522     ],
 523     'PVEFW-Drop' => [
 524         # same as shorewall 'Drop', which is equal to DROP,
 525         # but REJECT/DROP some packages to reduce logging,
 526         # and ACCEPT critical ICMP types
 527         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 528         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 529         { action => 'PVEFW-DropBroadcast' },
 530         # ACCEPT critical ICMP types
 531         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 532         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 533         # Drop packets with INVALID state
 534         "-m conntrack --ctstate INVALID -j DROP",
 535         # Drop Microsoft SMB noise
 536         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 537         { action => 'DROP', proto => 'udp', dport => '137:139'},
 538         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 539         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 540         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 541         # Drop new/NotSyn traffic so that it doesn't get logged
 542         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 543         # Drop DNS replies
 544         { action => 'DROP', proto => 'udp', sport => 53 },
 545     ],
 546     'PVEFW-Reject' => [
 547         # same as shorewall 'Reject', which is equal to Reject,
 548         # but REJECT/DROP some packages to reduce logging,
 549         # and ACCEPT critical ICMP types
 550         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 551         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 552         { action => 'PVEFW-DropBroadcast' },
 553         # ACCEPT critical ICMP types
 554         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 555         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 556         # Drop packets with INVALID state
 557         "-m conntrack --ctstate INVALID -j DROP",
 558         # Drop Microsoft SMB noise
 559         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 560         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 561         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 562         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 563         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 564         # Drop new/NotSyn traffic so that it doesn't get logged
 565         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 566         # Drop DNS replies
 567         { action => 'DROP', proto => 'udp', sport => 53 },
 568     ],
 569     'PVEFW-tcpflags' => [
 570         # same as shorewall tcpflags action.
 571         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 572         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 573         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 574         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 575         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 576         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 577     ],
 578     'PVEFW-smurfs' => [
 579         # same as shorewall smurfs action
 580         # Filter packets for smurfs (packets with a broadcast address as the source).
 581         "-s 0.0.0.0/32 -j RETURN",
 582         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 583         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 584     ],
 585 };
 586
 587 # iptables -p icmp -h
 588 my $icmp_type_names = {
 589     any => 1,
 590     'echo-reply' => 1,
 591     'destination-unreachable' => 1,
 592     'network-unreachable' => 1,
 593     'host-unreachable' => 1,
 594     'protocol-unreachable' => 1,
 595     'port-unreachable' => 1,
 596     'fragmentation-needed' => 1,
 597     'source-route-failed' => 1,
 598     'network-unknown' => 1,
 599     'host-unknown' => 1,
 600     'network-prohibited' => 1,
 601     'host-prohibited' => 1,
 602     'TOS-network-unreachable' => 1,
 603     'TOS-host-unreachable' => 1,
 604     'communication-prohibited' => 1,
 605     'host-precedence-violation' => 1,
 606     'precedence-cutoff' => 1,
 607     'source-quench' => 1,
 608     'redirect' => 1,
 609     'network-redirect' => 1,
 610     'host-redirect' => 1,
 611     'TOS-network-redirect' => 1,
 612     'TOS-host-redirect' => 1,
 613     'echo-request' => 1,
 614     'router-advertisement' => 1,
 615     'router-solicitation' => 1,
 616     'time-exceeded' => 1,
 617     'ttl-zero-during-transit' => 1,
 618     'ttl-zero-during-reassembly' => 1,
 619     'parameter-problem' => 1,
 620     'ip-header-bad' => 1,
 621     'required-option-missing' => 1,
 622     'timestamp-request' => 1,
 623     'timestamp-reply' => 1,
 624     'address-mask-request' => 1,
 625     'address-mask-reply' => 1,
 626 };
 627
 628 sub init_firewall_macros {
 629
 630     $pve_fw_parsed_macros = {};
 631
 632     foreach my $k (keys %$pve_fw_macros) {
 633         my $lc_name = lc($k);
 634         my $macro = $pve_fw_macros->{$k};
 635         if (!ref($macro->[0])) {
 636             $pve_fw_macro_descr->{$k} = shift @$macro;
 637         }
 638         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 639         $pve_fw_parsed_macros->{$k} = $macro;
 640     }
 641 }
 642
 643 init_firewall_macros();
 644
 645 sub get_macros {
 646     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 647 }
 648
 649 my $etc_services;
 650
 651 sub get_etc_services {
 652
 653     return $etc_services if $etc_services;
 654
 655     my $filename = "/etc/services";
 656
 657     my $fh = IO::File->new($filename, O_RDONLY);
 658     if (!$fh) {
 659         warn "unable to read '$filename' - $!\n";
 660         return {};
 661     }
 662
 663     my $services = {};
 664
 665     while (my $line = <$fh>) {
 666         chomp ($line);
 667         next if $line =~m/^#/;
 668         next if ($line =~m/^\s*$/);
 669
 670         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 671             $services->{byid}->{$2}->{name} = $1;
 672             $services->{byid}->{$2}->{port} = $2;
 673             $services->{byid}->{$2}->{$3} = 1;
 674             $services->{byname}->{$1} = $services->{byid}->{$2};
 675         }
 676     }
 677
 678     close($fh);
 679
 680     $etc_services = $services;
 681
 682
 683     return $etc_services;
 684 }
 685
 686 my $etc_protocols;
 687
 688 sub get_etc_protocols {
 689     return $etc_protocols if $etc_protocols;
 690
 691     my $filename = "/etc/protocols";
 692
 693     my $fh = IO::File->new($filename, O_RDONLY);
 694     if (!$fh) {
 695         warn "unable to read '$filename' - $!\n";
 696         return {};
 697     }
 698
 699     my $protocols = {};
 700
 701     while (my $line = <$fh>) {
 702         chomp ($line);
 703         next if $line =~m/^#/;
 704         next if ($line =~m/^\s*$/);
 705
 706         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 707             $protocols->{byid}->{$2}->{name} = $1;
 708             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 709         }
 710     }
 711
 712     close($fh);
 713
 714     $etc_protocols = $protocols;
 715
 716     return $etc_protocols;
 717 }
 718
 719 sub parse_address_list {
 720     my ($str) = @_;
 721
 722     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 723     return if $str =~ m/^${ip_alias_pattern}$/;
 724
 725     my $count = 0;
 726     my $iprange = 0;
 727     foreach my $elem (split(/,/, $str)) {
 728         $count++;
 729         if (!Net::IP->new($elem)) {
 730             my $err = Net::IP::Error();
 731             die "invalid IP address: $err\n";
 732         }
 733         $iprange = 1 if $elem =~ m/-/;
 734     }
 735
 736     die "you can use a range in a list\n" if $iprange && $count > 1;
 737 }
 738
 739 sub parse_port_name_number_or_range {
 740     my ($str) = @_;
 741
 742     my $services = PVE::Firewall::get_etc_services();
 743     my $count = 0;
 744     my $icmp_port = 0;
 745
 746     foreach my $item (split(/,/, $str)) {
 747         $count++;
 748         if ($item =~ m/^(\d+):(\d+)$/) {
 749             my ($port1, $port2) = ($1, $2);
 750             die "invalid port '$port1'\n" if $port1 > 65535;
 751             die "invalid port '$port2'\n" if $port2 > 65535;
 752         } elsif ($item =~ m/^(\d+)$/) {
 753             my $port = $1;
 754             die "invalid port '$port'\n" if $port > 65535;
 755         } else {
 756             if ($icmp_type_names->{$item}) {
 757                 $icmp_port = 1;
 758             } else {
 759                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 760             }
 761         }
 762     }
 763
 764     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 765
 766     return $count;
 767 }
 768
 769 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 770 sub pve_fw_verify_port_spec {
 771    my ($portstr) = @_;
 772
 773    parse_port_name_number_or_range($portstr);
 774
 775    return $portstr;
 776 }
 777
 778 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 779 sub pve_fw_verify_v4addr_spec {
 780    my ($list) = @_;
 781
 782    parse_address_list($list);
 783
 784    return $list;
 785 }
 786
 787 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 788 sub pve_fw_verify_protocol_spec {
 789    my ($proto) = @_;
 790
 791    my $protocols = get_etc_protocols();
 792
 793    die "unknown protocol '$proto'\n" if $proto &&
 794        !(defined($protocols->{byname}->{$proto}) ||
 795          defined($protocols->{byid}->{$proto}));
 796
 797    return $proto;
 798 }
 799
 800
 801 # helper function for API
 802
 803 sub copy_opject_with_digest {
 804     my ($object) = @_;
 805
 806     my $sha = Digest::SHA->new('sha1');
 807
 808     my $res = {};
 809     foreach my $k (sort keys %$object) {
 810         my $v = $object->{$k};
 811         next if !defined($v);
 812         $res->{$k} = $v;
 813         $sha->add($k, ':', $v, "\n");
 814     }
 815
 816     my $digest = $sha->hexdigest;
 817
 818     $res->{digest} = $digest;
 819
 820     return wantarray ? ($res, $digest) : $res;
 821 }
 822
 823 sub copy_list_with_digest {
 824     my ($list) = @_;
 825
 826     my $sha = Digest::SHA->new('sha1');
 827
 828     my $res = [];
 829     foreach my $entry (@$list) {
 830         my $data = {};
 831         foreach my $k (sort keys %$entry) {
 832             my $v = $entry->{$k};
 833             next if !defined($v);
 834             $data->{$k} = $v;
 835             $sha->add($k, ':', $v, "\n");
 836         }
 837         push @$res, $data;
 838     }
 839
 840     my $digest = $sha->hexdigest;
 841
 842     foreach my $entry (@$res) {
 843         $entry->{digest} = $digest;
 844     }
 845
 846     return wantarray ? ($res, $digest) : $res;
 847 }
 848
 849 my $rule_properties = {
 850     pos => {
 851         description => "Update rule at position <pos>.",
 852         type => 'integer',
 853         minimum => 0,
 854         optional => 1,
 855     },
 856     digest => get_standard_option('pve-config-digest'),
 857     type => {
 858         type => 'string',
 859         optional => 1,
 860         enum => ['in', 'out', 'group'],
 861     },
 862     action => {
 863         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
 864         type => 'string',
 865         optional => 1,
 866         pattern => $security_group_name_pattern,
 867         maxLength => 20,
 868         minLength => 2,
 869     },
 870     macro => {
 871         type => 'string',
 872         optional => 1,
 873         maxLength => 128,
 874     },
 875     iface => get_standard_option('pve-iface', { optional => 1 }),
 876     source => {
 877         type => 'string', format => 'pve-fw-v4addr-spec',
 878         optional => 1,
 879     },
 880     dest => {
 881         type => 'string', format => 'pve-fw-v4addr-spec',
 882         optional => 1,
 883     },
 884     proto => {
 885         type => 'string', format => 'pve-fw-protocol-spec',
 886         optional => 1,
 887     },
 888     enable => {
 889         type => 'boolean',
 890         optional => 1,
 891     },
 892     sport => {
 893         type => 'string', format => 'pve-fw-port-spec',
 894         optional => 1,
 895     },
 896     dport => {
 897         type => 'string', format => 'pve-fw-port-spec',
 898         optional => 1,
 899     },
 900     comment => {
 901         type => 'string',
 902         optional => 1,
 903     },
 904 };
 905
 906 sub add_rule_properties {
 907     my ($properties) = @_;
 908
 909     foreach my $k (keys %$rule_properties) {
 910         my $h = $rule_properties->{$k};
 911         # copy data, so that we can modify later without side effects
 912         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 913     }
 914
 915     return $properties;
 916 }
 917
 918 sub delete_rule_properties {
 919     my ($rule, $delete_str) = @_;
 920
 921     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 922         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 923             if !defined($rule_properties->{$opt});
 924         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 925             if $opt eq 'type' || $opt eq 'action';
 926         delete $rule->{$opt};
 927     }
 928
 929     return $rule;
 930 }
 931
 932 my $apply_macro = sub {
 933     my ($macro_name, $param, $verify) = @_;
 934
 935     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 936     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 937
 938     my $rules = [];
 939
 940     foreach my $templ (@$macro_rules) {
 941         my $rule = {};
 942         my $param_used = {};
 943         foreach my $k (keys %$templ) {
 944             my $v = $templ->{$k};
 945             if ($v eq 'PARAM') {
 946                 $v = $param->{$k};
 947                 $param_used->{$k} = 1;
 948             } elsif ($v eq 'DEST') {
 949                 $v = $param->{dest};
 950                 $param_used->{dest} = 1;
 951             } elsif ($v eq 'SOURCE') {
 952                 $v = $param->{source};
 953                 $param_used->{source} = 1;
 954             }
 955
 956             if (!defined($v)) {
 957                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 958                 raise_param_exc({ macro => $msg }) if $verify;
 959                 die "$msg\n";
 960             }
 961             $rule->{$k} = $v;
 962         }
 963         foreach my $k (keys %$param) {
 964             next if $k eq 'macro';
 965             next if !defined($param->{$k});
 966             next if $param_used->{$k};
 967             if (defined($rule->{$k})) {
 968                 if ($rule->{$k} ne $param->{$k}) {
 969                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 970                     raise_param_exc({ $k => $msg }) if $verify;
 971                     die "$msg\n";
 972                 }
 973             } else {
 974                 $rule->{$k} = $param->{$k};
 975             }
 976         }
 977         push @$rules, $rule;
 978     }
 979
 980     return $rules;
 981 };
 982
 983 sub verify_rule {
 984     my ($rule, $allow_groups) = @_;
 985
 986     my $type = $rule->{type};
 987
 988     raise_param_exc({ type => "missing property"}) if !$type;
 989     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 990
 991     if ($type eq  'in' || $type eq 'out') {
 992         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 993             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 994     } elsif ($type eq 'group') {
 995         raise_param_exc({ type => "security groups not allowed"})
 996             if !$allow_groups;
 997         raise_param_exc({ action => "invalid characters in security group name"})
 998             if $rule->{action} !~ m/^${security_group_name_pattern}$/;
 999     } else {
1000         raise_param_exc({ type => "unknown rule type '$type'"});
1001     }
1002
1003     if ($rule->{iface}) {
1004         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1005         raise_param_exc({ iface => $@ }) if $@;
1006     }
1007
1008     if ($rule->{macro}) {
1009         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
1010         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
1011         $rule->{macro} = $preferred_name;
1012     }
1013
1014     if ($rule->{dport}) {
1015         eval { parse_port_name_number_or_range($rule->{dport}); };
1016         raise_param_exc({ dport => $@ }) if $@;
1017     }
1018
1019     if ($rule->{sport}) {
1020         eval { parse_port_name_number_or_range($rule->{sport}); };
1021         raise_param_exc({ sport => $@ }) if $@;
1022     }
1023
1024     if ($rule->{source}) {
1025         eval { parse_address_list($rule->{source}); };
1026         raise_param_exc({ source => $@ }) if $@;
1027     }
1028
1029     if ($rule->{dest}) {
1030         eval { parse_address_list($rule->{dest}); };
1031         raise_param_exc({ dest => $@ }) if $@;
1032     }
1033
1034     if ($rule->{macro}) {
1035         &$apply_macro($rule->{macro}, $rule, 1);
1036     }
1037
1038     return $rule;
1039 }
1040
1041 sub copy_rule_data {
1042     my ($rule, $param) = @_;
1043
1044     foreach my $k (keys %$rule_properties) {
1045         if (defined(my $v = $param->{$k})) {
1046             if ($v eq '' || $v eq '-') {
1047                 delete $rule->{$k};
1048             } else {
1049                 $rule->{$k} = $v;
1050             }
1051         } else {
1052             delete $rule->{$k};
1053         }
1054     }
1055
1056     # verify rule now
1057
1058     return $rule;
1059 }
1060
1061 # core functions
1062 my $bridge_firewall_enabled = 0;
1063
1064 sub enable_bridge_firewall {
1065
1066     return if $bridge_firewall_enabled; # only once
1067
1068     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1069     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1070
1071     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1072     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1073
1074     $bridge_firewall_enabled = 1;
1075 }
1076
1077 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1078
1079 sub iptables_restore_cmdlist {
1080     my ($cmdlist) = @_;
1081
1082     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1083 }
1084
1085 sub ipset_restore_cmdlist {
1086     my ($cmdlist) = @_;
1087
1088     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1089 }
1090
1091 sub iptables_get_chains {
1092
1093     my $res = {};
1094
1095     # check what chains we want to track
1096     my $is_pvefw_chain = sub {
1097         my $name = shift;
1098
1099         return 1 if $name =~ m/^PVEFW-\S+$/;
1100
1101         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1102
1103         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1104
1105         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1106
1107         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(:?FW|IN|OUT|IPS)$/;
1108         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1109
1110         return undef;
1111     };
1112
1113     my $table = '';
1114
1115     my $hooks = {};
1116
1117     my $parser = sub {
1118         my $line = shift;
1119
1120         return if $line =~ m/^#/;
1121         return if $line =~ m/^\s*$/;
1122
1123         if ($line =~ m/^\*(\S+)$/) {
1124             $table = $1;
1125             return;
1126         }
1127
1128         return if $table ne 'filter';
1129
1130         if ($line =~ m/^:(\S+)\s/) {
1131             my $chain = $1;
1132             return if !&$is_pvefw_chain($chain);
1133             $res->{$chain} = "unknown";
1134         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1135             my ($chain, $sig) = ($1, $2);
1136             return if !&$is_pvefw_chain($chain);
1137             $res->{$chain} = $sig;
1138         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1139             $hooks->{$1} = 1;
1140         } else {
1141             # simply ignore the rest
1142             return;
1143         }
1144     };
1145
1146     run_command("/sbin/iptables-save", outfunc => $parser);
1147
1148     return wantarray ? ($res, $hooks) : $res;
1149 }
1150
1151 sub iptables_chain_digest {
1152     my ($rules) = @_;
1153     my $digest = Digest::SHA->new('sha1');
1154     foreach my $rule (@$rules) { # order is important
1155         $digest->add($rule);
1156     }
1157     return $digest->b64digest;
1158 }
1159
1160 sub ipset_chain_digest {
1161     my ($rules) = @_;
1162
1163     my $digest = Digest::SHA->new('sha1');
1164     foreach my $rule (sort @$rules) { # note: sorted
1165         $digest->add($rule);
1166     }
1167     return $digest->b64digest;
1168 }
1169
1170 sub ipset_get_chains {
1171
1172     my $res = {};
1173     my $chains = {};
1174
1175     my $parser = sub {
1176         my $line = shift;
1177
1178         return if $line =~ m/^#/;
1179         return if $line =~ m/^\s*$/;
1180         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1181             my $chain = $1;
1182             $line =~ s/\s+$//; # delete trailing white space
1183             push @{$chains->{$chain}}, $line;
1184         } else {
1185             # simply ignore the rest
1186             return;
1187         }
1188     };
1189
1190     run_command("/usr/sbin/ipset save", outfunc => $parser);
1191
1192     # compute digest for each chain
1193     foreach my $chain (keys %$chains) {
1194         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1195     }
1196
1197     return $res;
1198 }
1199
1200 sub ruleset_generate_cmdstr {
1201     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1202
1203     return if defined($rule->{enable}) && !$rule->{enable};
1204
1205     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1206
1207     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1208     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1209
1210     my @cmd = ();
1211
1212     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1213     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1214
1215     my $source = $rule->{source};
1216     my $dest = $rule->{dest};
1217
1218     if ($source) {
1219         if ($source =~ m/^\+/) {
1220             if ($source =~ m/^\+(${security_group_name_pattern})$/) {
1221                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1222                 push @cmd, "-m set --match-set PVEFW-$1 src";
1223             } else {
1224                 die "invalid security group name '$source'\n";
1225             }
1226         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1227             my $alias = lc($source);
1228             my $e = $cluster_conf->{aliases}->{$alias};
1229             die "no such alias $source\n" if !$e;
1230             push @cmd, "-s $e->{cidr}";
1231         } elsif ($source =~ m/\-/){
1232             push @cmd, "-m iprange --src-range $source";
1233
1234         } else {
1235             push @cmd, "-s $source";
1236         }
1237     }
1238
1239     if ($dest) {
1240         if ($dest =~ m/^\+/) {
1241             if ($dest =~ m/^\+(${security_group_name_pattern})$/) {
1242                 die "no such ipset '$1'\n" if !$cluster_conf->{ipset}->{$1};
1243                 push @cmd, "-m set --match-set PVEFW-$1 dst";
1244             } else {
1245                 die "invalid security group name '$dest'\n";
1246             }
1247         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1248             my $alias = lc($dest);
1249             my $e = $cluster_conf->{aliases}->{$alias};
1250             die "no such alias $dest" if !$e;
1251             push @cmd, "-d $e->{cidr}";
1252         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1253             push @cmd, "-m iprange --dst-range $dest";
1254
1255         } else {
1256             push @cmd, "-d $dest";
1257         }
1258     }
1259
1260     if ($rule->{proto}) {
1261         push @cmd, "-p $rule->{proto}";
1262
1263         my $multiport = 0;
1264         $multiport++ if $nbdport > 1;
1265         $multiport++ if $nbsport > 1;
1266
1267         push @cmd, "--match multiport" if $multiport;
1268
1269         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1270             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1271
1272         if ($rule->{dport}) {
1273             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1274                 # Note: we use dport to store --icmp-type
1275                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1276                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1277             } else {
1278                 if ($nbdport > 1) {
1279                     if ($multiport == 2) {
1280                         push @cmd,  "--ports $rule->{dport}";
1281                     } else {
1282                         push @cmd, "--dports $rule->{dport}";
1283                     }
1284                 } else {
1285                     push @cmd, "--dport $rule->{dport}";
1286                 }
1287             }
1288         }
1289
1290         if ($rule->{sport}) {
1291             if ($nbsport > 1) {
1292                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1293             } else {
1294                 push @cmd, "--sport $rule->{sport}";
1295             }
1296         }
1297     } elsif ($rule->{dport} || $rule->{sport}) {
1298         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1299         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1300     }
1301
1302     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1303
1304     if (my $action = $rule->{action}) {
1305         $action = $actions->{$action} if defined($actions->{$action});
1306         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1307         push @cmd, $goto ? "-g $action" : "-j $action";
1308     }
1309
1310     return scalar(@cmd) ? join(' ', @cmd) : undef;
1311 }
1312
1313 sub ruleset_generate_rule {
1314     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1315
1316     my $rules;
1317
1318     if ($rule->{macro}) {
1319         $rules = &$apply_macro($rule->{macro}, $rule);
1320     } else {
1321         $rules = [ $rule ];
1322     }
1323
1324     # update all or nothing
1325
1326     my @cmds = ();
1327     foreach my $tmp (@$rules) {
1328         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1329             push @cmds, $cmdstr;
1330         }
1331     }
1332
1333     foreach my $cmdstr (@cmds) {
1334         ruleset_addrule($ruleset, $chain, $cmdstr);
1335     }
1336 }
1337
1338 sub ruleset_generate_rule_insert {
1339     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1340
1341     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1342
1343     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1344         ruleset_insertrule($ruleset, $chain, $cmdstr);
1345     }
1346 }
1347
1348 sub ruleset_create_chain {
1349     my ($ruleset, $chain) = @_;
1350
1351     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1352     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1353
1354     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1355
1356     $ruleset->{$chain} = [];
1357 }
1358
1359 sub ruleset_chain_exist {
1360     my ($ruleset, $chain) = @_;
1361
1362     return $ruleset->{$chain} ? 1 : undef;
1363 }
1364
1365 sub ruleset_addrule {
1366    my ($ruleset, $chain, $rule) = @_;
1367
1368    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1369
1370    push @{$ruleset->{$chain}}, "-A $chain $rule";
1371 }
1372
1373 sub ruleset_insertrule {
1374    my ($ruleset, $chain, $rule) = @_;
1375
1376    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1377
1378    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1379 }
1380
1381 sub get_log_rule_base {
1382     my ($chain, $vmid, $msg, $loglevel) = @_;
1383
1384     die "internal error - no log level" if !defined($loglevel);
1385
1386     $vmid = 0 if !defined($vmid);
1387
1388     # Note: we use special format for prefix to pass further
1389     # info to log daemon (VMID, LOGVELEL and CHAIN)
1390
1391     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1392 }
1393
1394 sub ruleset_addlog {
1395     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1396
1397     return if !defined($loglevel);
1398
1399     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1400
1401     $logrule = "$rule $logrule" if defined($rule);
1402
1403     ruleset_addrule($ruleset, $chain, $logrule);
1404 }
1405
1406 sub ruleset_add_chain_policy {
1407     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1408
1409     if ($policy eq 'ACCEPT') {
1410
1411         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1412                               { ACCEPT =>  $accept_action});
1413
1414     } elsif ($policy eq 'DROP') {
1415
1416         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1417
1418         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1419
1420         ruleset_addrule($ruleset, $chain, "-j DROP");
1421     } elsif ($policy eq 'REJECT') {
1422         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1423
1424         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1425
1426         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1427     } else {
1428         # should not happen
1429         die "internal error: unknown policy '$policy'";
1430     }
1431 }
1432
1433 sub ruleset_chain_add_conn_filters {
1434     my ($ruleset, $chain, $accept) = @_;
1435
1436     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1437     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1438 }
1439
1440 sub ruleset_chain_add_input_filters {
1441     my ($ruleset, $chain, $options, $cluster_conf, $loglevel) = @_;
1442
1443     if ($cluster_conf->{ipset}->{blacklist}){
1444         ruleset_addlog($ruleset, $chain, 0, "DROP: ", $loglevel, "-m set --match-set PVEFW-blacklist src");
1445         ruleset_addrule($ruleset, $chain, "-m set --match-set PVEFW-blacklist src -j DROP");
1446     }
1447
1448     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1449         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1450     }
1451
1452     if ($options->{tcpflags}) {
1453         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1454     }
1455 }
1456
1457 sub ruleset_create_vm_chain {
1458     my ($ruleset, $chain, $options, $host_options, $macaddr, $direction) = @_;
1459
1460     ruleset_create_chain($ruleset, $chain);
1461     my $accept = generate_nfqueue($options);
1462
1463     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1464         if ($direction eq 'OUT') {
1465             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1466                                                       proto => 'udp', sport => 68, dport => 67 });
1467         } else {
1468             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1469                                                       proto => 'udp', sport => 67, dport => 68 });
1470         }
1471     }
1472
1473     if ($direction eq 'OUT') {
1474         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1475             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1476         }
1477         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1478     }
1479 }
1480
1481 sub ruleset_add_group_rule {
1482     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action) = @_;
1483
1484     my $group = $rule->{action};
1485     my $group_chain = "GROUP-$group-$direction";
1486     if(!ruleset_chain_exist($ruleset, $group_chain)){
1487         generate_group_rules($ruleset, $cluster_conf, $group);
1488     }
1489
1490     if ($direction eq 'OUT' && $rule->{iface_out}) {
1491         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
1492     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
1493         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
1494     } else {
1495         ruleset_addrule($ruleset, $chain, "-j $group_chain");
1496     }
1497
1498     ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $action");
1499 }
1500
1501 sub ruleset_generate_vm_rules {
1502     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1503
1504     my $lc_direction = lc($direction);
1505
1506     my $in_accept = generate_nfqueue($options);
1507
1508     foreach my $rule (@$rules) {
1509         next if $rule->{iface} && $rule->{iface} ne $netid;
1510         next if !$rule->{enable};
1511         if ($rule->{type} eq 'group') {
1512             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
1513                                    $direction eq 'OUT' ? 'RETURN' : $in_accept);
1514         } else {
1515             next if $rule->{type} ne $lc_direction;
1516             eval {
1517                 if ($direction eq 'OUT') {
1518                     ruleset_generate_rule($ruleset, $chain, $rule,
1519                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
1520                                           undef, $cluster_conf);
1521                 } else {
1522                     ruleset_generate_rule($ruleset, $chain, $rule,
1523                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
1524                                           undef, $cluster_conf);
1525                 }
1526             };
1527             warn $@ if $@;
1528         }
1529     }
1530 }
1531
1532 sub generate_nfqueue {
1533     my ($options) = @_;
1534
1535     if ($options->{ips}) {
1536         my $action = "NFQUEUE";
1537         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1538             if (defined($3) && defined($1)) {
1539                 $action .= " --queue-balance $1:$3";
1540             } elsif (defined($1)) {
1541                 $action .= " --queue-num $1";
1542             }
1543         }
1544         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
1545         return $action;
1546     } else {
1547         return "ACCEPT";
1548     }
1549 }
1550
1551 sub ruleset_generate_vm_ipsrules {
1552     my ($ruleset, $options, $direction, $iface) = @_;
1553
1554     if ($options->{ips} && $direction eq 'IN') {
1555         my $nfqueue = generate_nfqueue($options);
1556
1557         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
1558             ruleset_create_chain($ruleset, "PVEFW-IPS");
1559         }
1560
1561         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1562     }
1563 }
1564
1565 sub generate_venet_rules_direction {
1566     my ($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
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, $accept_action);
1594
1595     if ($direction eq 'OUT') {
1596         ruleset_generate_rule_insert($ruleset, "PVEFW-VENET-OUT", {
1597             action => $chain,
1598             source => $ip,
1599             iface_in => 'venet0'});
1600     } else {
1601         ruleset_generate_rule($ruleset, "PVEFW-VENET-IN", {
1602             action => $chain,
1603             dest => $ip,
1604             iface_out => 'venet0'});
1605     }
1606 }
1607
1608 sub generate_tap_rules_direction {
1609     my ($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction) = @_;
1610
1611     my $lc_direction = lc($direction);
1612
1613     my $rules = $vmfw_conf->{rules};
1614
1615     my $options = $vmfw_conf->{options};
1616     my $hostfw_options = $hostfw_conf->{options};
1617     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1618
1619     my $tapchain = "$iface-$direction";
1620
1621     ruleset_create_vm_chain($ruleset, $tapchain, $options, $hostfw_options, $macaddr, $direction);
1622
1623     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1624
1625     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
1626
1627     # implement policy
1628     my $policy;
1629
1630     if ($direction eq 'OUT') {
1631         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1632     } else {
1633         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1634     }
1635
1636     my $accept = generate_nfqueue($options);
1637     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1638     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1639
1640     # plug the tap chain to bridge chain
1641     if ($direction eq 'IN') {
1642         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
1643                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1644     } else {
1645         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
1646                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
1647     }
1648 }
1649
1650 sub enable_host_firewall {
1651     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1652
1653     my $options = $hostfw_conf->{options};
1654     my $cluster_options = $cluster_conf->{options};
1655     my $rules = $hostfw_conf->{rules};
1656     my $cluster_rules = $cluster_conf->{rules};
1657
1658     # host inbound firewall
1659     my $chain = "PVEFW-HOST-IN";
1660     ruleset_create_chain($ruleset, $chain);
1661
1662     my $loglevel = get_option_log_level($options, "log_level_in");
1663
1664     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1665
1666     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1667     ruleset_chain_add_input_filters($ruleset, $chain, $options, $cluster_conf, $loglevel);
1668
1669     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1670     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1671     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1672
1673     # we use RETURN because we need to check also tap rules
1674     my $accept_action = 'RETURN';
1675
1676     # add host rules first, so that cluster wide rules can be overwritten
1677     foreach my $rule (@$rules, @$cluster_rules) {
1678         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
1679         if ($rule->{type} eq 'group') {
1680             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action);
1681         } elsif ($rule->{type} eq 'in') {
1682             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1683                                   undef, $cluster_conf);
1684         }
1685         delete $rule->{iface_in};
1686     }
1687
1688     # implement input policy
1689     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
1690     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1691
1692     # host outbound firewall
1693     $chain = "PVEFW-HOST-OUT";
1694     ruleset_create_chain($ruleset, $chain);
1695
1696     $loglevel = get_option_log_level($options, "log_level_out");
1697
1698     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1699
1700     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
1701
1702     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1703     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1704     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1705
1706     # we use RETURN because we may want to check other thigs later
1707     $accept_action = 'RETURN';
1708
1709     # add host rules first, so that cluster wide rules can be overwritten
1710     foreach my $rule (@$rules, @$cluster_rules) {
1711         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
1712         if ($rule->{type} eq 'group') {
1713             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action);
1714         } elsif ($rule->{type} eq 'out') {
1715             ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
1716                                   undef, $cluster_conf);
1717         }
1718         delete $rule->{iface_out};
1719     }
1720
1721     # implement output policy
1722     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
1723     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1724
1725     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1726     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1727 }
1728
1729 sub generate_group_rules {
1730     my ($ruleset, $cluster_conf, $group) = @_;
1731
1732     my $rules = $cluster_conf->{groups}->{$group};
1733
1734     if (!$rules) {
1735         warn "no such security group '$group'\n";
1736         $rules = []; # create empty chain
1737     }
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, $allow_iface, $allow_groups) = @_;
1771
1772     my ($type, $action, $macro, $iface, $source, $dest, $proto, $dport, $sport);
1773
1774     chomp $line;
1775
1776     # we can add single line comments to the end of the rule
1777     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1778
1779     # we can disable a rule when prefixed with '|'
1780     my $enable = 1;
1781
1782     $enable = 0 if $line =~ s/^\|//;
1783
1784     $line =~ s/^(\S+)\s+(\S+)\s*// ||
1785         die "unable to parse rule: $line\n";
1786
1787     $type = lc($1);
1788     $action = $2;
1789
1790     if ($type eq  'in' || $type eq 'out') {
1791         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1792             # OK
1793         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1794             $action = $2;
1795             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1796             die "unknown macro '$1'\n" if !$preferred_name;
1797             $macro = $preferred_name;
1798         } else {
1799             die "unknown action '$action'\n";
1800         }
1801     } elsif ($type eq 'group') {
1802         die "groups disabled\n" if !$allow_groups;
1803         die "invalid characters in group name\n" if $action !~ m/^${security_group_name_pattern}$/;
1804     } else {
1805         die "unknown rule type '$type'\n";
1806     }
1807
1808     while (length($line)) {
1809         if ($line =~ s/^-i (\S+)\s*//) {
1810             die "parameter -i not allowed\n" if !$allow_iface;
1811             $iface = $1;
1812             PVE::JSONSchema::pve_verify_iface($iface);
1813             next;
1814         }
1815
1816         last if $type eq 'group';
1817
1818         if ($line =~ s/^-p (\S+)\s*//) {
1819             $proto = $1;
1820             pve_fw_verify_protocol_spec($proto);
1821             next;
1822         }
1823         if ($line =~ s/^-dport (\S+)\s*//) {
1824             $dport = $1;
1825             parse_port_name_number_or_range($dport);
1826             next;
1827         }
1828         if ($line =~ s/^-sport (\S+)\s*//) {
1829             $sport = $1;
1830             parse_port_name_number_or_range($sport);
1831             next;
1832         }
1833         if ($line =~ s/^-source (\S+)\s*//) {
1834             $source = $1;
1835             parse_address_list($source);
1836             next;
1837         }
1838         if ($line =~ s/^-dest (\S+)\s*//) {
1839             $dest = $1;
1840             parse_address_list($dest);
1841             next;
1842         }
1843
1844         last;
1845     }
1846
1847     die "unable to parse rule parameters: $line\n" if length($line);
1848
1849     return {
1850         type => $type,
1851         enable => $enable,
1852         comment => $comment,
1853         action => $action,
1854         macro => $macro,
1855         iface => $iface,
1856         source => $source,
1857         dest => $dest,
1858         proto => $proto,
1859         dport => $dport,
1860         sport => $sport,
1861     };
1862 }
1863
1864 sub parse_vmfw_option {
1865     my ($line) = @_;
1866
1867     my ($opt, $value);
1868
1869     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1870
1871     if ($line =~ m/^(enable|dhcp|macfilter|ips):\s*(0|1)\s*$/i) {
1872         $opt = lc($1);
1873         $value = int($2);
1874     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1875         $opt = lc($1);
1876         $value = $2 ? lc($3) : '';
1877     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1878         $opt = lc($1);
1879         $value = uc($3);
1880     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1881         $opt = lc($1);
1882         $value = $2;
1883     } else {
1884         chomp $line;
1885         die "can't parse option '$line'\n"
1886     }
1887
1888     return ($opt, $value);
1889 }
1890
1891 sub parse_hostfw_option {
1892     my ($line) = @_;
1893
1894     my ($opt, $value);
1895
1896     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1897
1898     if ($line =~ m/^(enable|nosmurfs|tcpflags):\s*(0|1)\s*$/i) {
1899         $opt = lc($1);
1900         $value = int($2);
1901     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1902         $opt = lc($1);
1903         $value = $2 ? lc($3) : '';
1904     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
1905         $opt = lc($1);
1906         $value = int($2);
1907     } else {
1908         chomp $line;
1909         die "can't parse option '$line'\n"
1910     }
1911
1912     return ($opt, $value);
1913 }
1914
1915 sub parse_clusterfw_option {
1916     my ($line) = @_;
1917
1918     my ($opt, $value);
1919
1920     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1921         $opt = lc($1);
1922         $value = int($2);
1923     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1924         $opt = lc($1);
1925         $value = uc($3);
1926     } else {
1927         chomp $line;
1928         die "can't parse option '$line'\n"
1929     }
1930
1931     return ($opt, $value);
1932 }
1933
1934 sub parse_clusterfw_alias {
1935     my ($line) = @_;
1936
1937     # we can add single line comments to the end of the line
1938     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
1939
1940     if ($line =~ m/^(\S+)\s(\S+)$/) {
1941         my ($name, $cidr) = ($1, $2);
1942         $cidr =~ s|/32$||;
1943         pve_verify_ipv4_or_cidr($cidr);
1944         my $data = {
1945             name => $name,
1946             cidr => $cidr,
1947         };
1948         $data->{comment} = $comment  if $comment;
1949         return $data;
1950     }
1951
1952     return undef;
1953 }
1954
1955 sub parse_vm_fw_rules {
1956     my ($filename, $fh) = @_;
1957
1958     my $res = { rules => [], options => {}};
1959
1960     my $section;
1961
1962     while (defined(my $line = <$fh>)) {
1963         next if $line =~ m/^#/;
1964         next if $line =~ m/^\s*$/;
1965
1966         my $linenr = $fh->input_line_number();
1967         my $prefix = "$filename (line $linenr)";
1968
1969         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1970             $section = lc($1);
1971             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1972             next;
1973         }
1974         if (!$section) {
1975             warn "$prefix: skip line - no section";
1976             next;
1977         }
1978
1979         next if !$res->{$section}; # skip undefined section
1980
1981         if ($section eq 'options') {
1982             eval {
1983                 my ($opt, $value) = parse_vmfw_option($line);
1984                 $res->{options}->{$opt} = $value;
1985             };
1986             warn "$prefix: $@" if $@;
1987             next;
1988         }
1989
1990         my $rule;
1991         eval { $rule = parse_fw_rule($line, 1, 1); };
1992         if (my $err = $@) {
1993             warn "$prefix: $err";
1994             next;
1995         }
1996
1997         push @{$res->{$section}}, $rule;
1998     }
1999
2000     return $res;
2001 }
2002
2003 sub parse_host_fw_rules {
2004     my ($filename, $fh) = @_;
2005
2006     my $res = { rules => [], options => {}};
2007
2008     my $section;
2009
2010     while (defined(my $line = <$fh>)) {
2011         next if $line =~ m/^#/;
2012         next if $line =~ m/^\s*$/;
2013
2014         my $linenr = $fh->input_line_number();
2015         my $prefix = "$filename (line $linenr)";
2016
2017         if ($line =~ m/^\[(\S+)\]\s*$/i) {
2018             $section = lc($1);
2019             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
2020             next;
2021         }
2022         if (!$section) {
2023             warn "$prefix: skip line - no section";
2024             next;
2025         }
2026
2027         next if !$res->{$section}; # skip undefined section
2028
2029         if ($section eq 'options') {
2030             eval {
2031                 my ($opt, $value) = parse_hostfw_option($line);
2032                 $res->{options}->{$opt} = $value;
2033             };
2034             warn "$prefix: $@" if $@;
2035             next;
2036         }
2037
2038         my $rule;
2039         eval { $rule = parse_fw_rule($line, 1, 1); };
2040         if (my $err = $@) {
2041             warn "$prefix: $err";
2042             next;
2043         }
2044
2045         push @{$res->{$section}}, $rule;
2046     }
2047
2048     return $res;
2049 }
2050
2051 sub parse_cluster_fw_rules {
2052     my ($filename, $fh) = @_;
2053
2054     my $section;
2055     my $group;
2056
2057     my $res = {
2058         rules => [],
2059         options => {},
2060         aliases => {},
2061         groups => {},
2062         group_comments => {},
2063         ipset => {} ,
2064         ipset_comments => {},
2065     };
2066
2067     while (defined(my $line = <$fh>)) {
2068         next if $line =~ m/^#/;
2069         next if $line =~ m/^\s*$/;
2070
2071         my $linenr = $fh->input_line_number();
2072         my $prefix = "$filename (line $linenr)";
2073
2074         if ($line =~ m/^\[options\]$/i) {
2075             $section = 'options';
2076             next;
2077         }
2078
2079         if ($line =~ m/^\[aliases\]$/i) {
2080             $section = 'aliases';
2081             next;
2082         }
2083
2084         if ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2085             $section = 'groups';
2086             $group = lc($1);
2087             my $comment = $2;
2088             $res->{$section}->{$group} = [];
2089             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2090                 if $comment;
2091             next;
2092         }
2093
2094         if ($line =~ m/^\[rules\]$/i) {
2095             $section = 'rules';
2096             next;
2097         }
2098
2099         if ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i) {
2100             $section = 'ipset';
2101             $group = lc($1);
2102             my $comment = $2;
2103             $res->{$section}->{$group} = [];
2104             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2105                 if $comment;
2106             next;
2107         }
2108
2109         if (!$section) {
2110             warn "$prefix: skip line - no section\n";
2111             next;
2112         }
2113
2114         if ($section eq 'options') {
2115             eval {
2116                 my ($opt, $value) = parse_clusterfw_option($line);
2117                 $res->{options}->{$opt} = $value;
2118             };
2119             warn "$prefix: $@" if $@;
2120         } elsif ($section eq 'aliases') {
2121             eval {
2122                 my $data = parse_clusterfw_alias($line);
2123                 $res->{aliases}->{lc($data->{name})} = $data;
2124             };
2125             warn "$prefix: $@" if $@;
2126         } elsif ($section eq 'rules') {
2127             my $rule;
2128             eval { $rule = parse_fw_rule($line, 1, 1); };
2129             if (my $err = $@) {
2130                 warn "$prefix: $err";
2131                 next;
2132             }
2133             push @{$res->{$section}}, $rule;
2134         } elsif ($section eq 'groups') {
2135             my $rule;
2136             eval { $rule = parse_fw_rule($line, 0, 0); };
2137             if (my $err = $@) {
2138                 warn "$prefix: $err";
2139                 next;
2140             }
2141             push @{$res->{$section}->{$group}}, $rule;
2142         } elsif ($section eq 'ipset') {
2143             # we can add single line comments to the end of the rule
2144             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2145
2146             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2147             my $nomatch = $1;
2148             my $cidr = $2;
2149
2150             if($cidr !~ m/^${ip_alias_pattern}$/) {
2151                 $cidr =~ s|/32$||;
2152
2153                 eval { pve_verify_ipv4_or_cidr($cidr); };
2154                 if (my $err = $@) {
2155                     warn "$prefix: $cidr - $err";
2156                     next;
2157                 }
2158             }
2159
2160             my $entry = { cidr => $cidr };
2161             $entry->{nomatch} = 1 if $nomatch;
2162             $entry->{comment} = $comment if $comment;
2163
2164             push @{$res->{$section}->{$group}}, $entry;
2165         }
2166     }
2167
2168     return $res;
2169 }
2170
2171 sub run_locked {
2172     my ($code, @param) = @_;
2173
2174     my $timeout = 10;
2175
2176     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2177
2178     die $@ if $@;
2179
2180     return $res;
2181 }
2182
2183 sub read_local_vm_config {
2184
2185     my $openvz = {};
2186     my $qemu = {};
2187
2188     my $vmdata = { openvz => $openvz, qemu => $qemu };
2189
2190     my $vmlist = PVE::Cluster::get_vmlist();
2191     return $vmdata if !$vmlist || !$vmlist->{ids};
2192     my $ids = $vmlist->{ids};
2193
2194     foreach my $vmid (keys %$ids) {
2195         next if !$vmid; # skip VE0
2196         my $d = $ids->{$vmid};
2197         next if !$d->{node} || $d->{node} ne $nodename;
2198         next if !$d->{type};
2199         if ($d->{type} eq 'openvz') {
2200             if ($have_pve_manager) {
2201                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2202                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2203                     $openvz->{$vmid} = $conf;
2204                 }
2205             }
2206         } elsif ($d->{type} eq 'qemu') {
2207             if ($have_qemu_server) {
2208                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2209                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2210                     $qemu->{$vmid} = $conf;
2211                 }
2212             }
2213         }
2214     }
2215
2216     return $vmdata;
2217 };
2218
2219 sub load_vmfw_conf {
2220     my ($vmid, $dir) = @_;
2221
2222     my $vmfw_conf = {};
2223
2224     $dir = "/etc/pve/firewall" if !defined($dir);
2225
2226     my $filename = "$dir/$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, $allow_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 .= " " . $rule->{action};
2247             }
2248             if ($allow_iface && $rule->{iface}) {
2249                 $raw .= " -i $rule->{iface}";
2250             }
2251
2252             if ($rule->{type} ne  'group')  {
2253                 $raw .= " -source $rule->{source}" if $rule->{source};
2254                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2255                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2256                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2257                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2258             }
2259
2260             $raw .= " # " . encode('utf8', $rule->{comment})
2261                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2262             $raw .= "\n";
2263         } else {
2264             die "unknown rule type '$rule->{type}'";
2265         }
2266     }
2267
2268     return $raw;
2269 };
2270
2271 my $format_options = sub {
2272     my ($options) = @_;
2273
2274     my $raw = '';
2275
2276     $raw .= "[OPTIONS]\n\n";
2277     foreach my $opt (keys %$options) {
2278         $raw .= "$opt: $options->{$opt}\n";
2279     }
2280     $raw .= "\n";
2281
2282     return $raw;
2283 };
2284
2285 my $format_aliases = sub {
2286     my ($aliases) = @_;
2287
2288     my $raw = '';
2289
2290     $raw .= "[ALIASES]\n\n";
2291     foreach my $k (keys %$aliases) {
2292         my $e = $aliases->{$k};
2293         $raw .= "$e->{name} $e->{cidr}";
2294         $raw .= " # " . encode('utf8', $e->{comment})
2295             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2296         $raw .= "\n";
2297     }
2298     $raw .= "\n";
2299
2300     return $raw;
2301 };
2302
2303 my $format_ipset = sub {
2304     my ($options) = @_;
2305
2306     my $raw = '';
2307
2308     my $nethash = {};
2309     foreach my $entry (@$options) {
2310         $nethash->{$entry->{cidr}} = $entry;
2311     }
2312
2313     foreach my $cidr (sort keys %$nethash) {
2314         my $entry = $nethash->{$cidr};
2315         my $line = $entry->{nomatch} ? '!' : '';
2316         $line .= $entry->{cidr};
2317         $line .= " # " . encode('utf8', $entry->{comment})
2318             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2319         $raw .= "$line\n";
2320     }
2321
2322     return $raw;
2323 };
2324
2325 sub save_vmfw_conf {
2326     my ($vmid, $vmfw_conf) = @_;
2327
2328     my $raw = '';
2329
2330     my $options = $vmfw_conf->{options};
2331     $raw .= &$format_options($options) if scalar(keys %$options);
2332
2333     my $rules = $vmfw_conf->{rules} || [];
2334     if (scalar(@$rules)) {
2335         $raw .= "[RULES]\n\n";
2336         $raw .= &$format_rules($rules, 1);
2337         $raw .= "\n";
2338     }
2339
2340     my $filename = "/etc/pve/firewall/$vmid.fw";
2341     PVE::Tools::file_set_contents($filename, $raw);
2342 }
2343
2344 sub read_vm_firewall_configs {
2345     my ($vmdata, $dir) = @_;
2346
2347     my $vmfw_configs = {};
2348
2349     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2350         my $vmfw_conf = load_vmfw_conf($vmid, $dir);
2351         next if !$vmfw_conf->{options}; # skip if file does not exists
2352         $vmfw_configs->{$vmid} = $vmfw_conf;
2353     }
2354
2355     return $vmfw_configs;
2356 }
2357
2358 sub get_option_log_level {
2359     my ($options, $k) = @_;
2360
2361     my $v = $options->{$k};
2362     $v = $default_log_level if !defined($v);
2363
2364     return undef if $v eq '' || $v eq 'nolog';
2365
2366     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2367
2368     return $v if ($v >= 0) && ($v <= 7);
2369
2370     warn "unknown log level ($k = '$v')\n";
2371
2372     return undef;
2373 }
2374
2375 sub generate_std_chains {
2376     my ($ruleset, $options) = @_;
2377
2378     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2379
2380     # same as shorewall smurflog.
2381     my $chain = 'PVEFW-smurflog';
2382     $pve_std_chains->{$chain} = [];
2383
2384     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2385     push @{$pve_std_chains->{$chain}}, "-j DROP";
2386
2387     # same as shorewall logflags action.
2388     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2389     $chain = 'PVEFW-logflags';
2390     $pve_std_chains->{$chain} = [];
2391
2392     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2393     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2394     push @{$pve_std_chains->{$chain}}, "-j DROP";
2395
2396     foreach my $chain (keys %$pve_std_chains) {
2397         ruleset_create_chain($ruleset, $chain);
2398         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2399             if (ref($rule)) {
2400                 ruleset_generate_rule($ruleset, $chain, $rule);
2401             } else {
2402                 ruleset_addrule($ruleset, $chain, $rule);
2403             }
2404         }
2405     }
2406 }
2407
2408 sub generate_ipset_chains {
2409     my ($ipset_ruleset, $fw_conf) = @_;
2410
2411     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2412         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset}, $fw_conf->{aliases});
2413     }
2414 }
2415
2416 sub generate_ipset {
2417     my ($ipset_ruleset, $name, $options, $aliases) = @_;
2418
2419     my $hashsize = scalar(@$options);
2420     if ($hashsize <= 64) {
2421         $hashsize = 64;
2422     } else {
2423         $hashsize = round_powerof2($hashsize);
2424     }
2425
2426     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2427
2428     # remove duplicates
2429     my $nethash = {};
2430     foreach my $entry (@$options) {
2431         my $cidr = $entry->{cidr};
2432         if ($cidr =~ m/^${ip_alias_pattern}$/) {
2433             my $alias = lc($cidr);
2434             if ($aliases->{$alias}) {
2435                 $entry->{cidr} = $aliases->{$alias}->{cidr};
2436                 $nethash->{$entry->{cidr}} = $entry;
2437             } else {
2438                 warn "no such alias '$cidr'\n" if !$aliases->{$alias};
2439             }
2440         } else {
2441             $nethash->{$entry->{cidr}} = $entry;
2442         }
2443     }
2444
2445     foreach my $cidr (sort keys %$nethash) {
2446         my $entry = $nethash->{$cidr};
2447
2448         my $cmd = "add $name $cidr";
2449         if ($entry->{nomatch}) {
2450             if ($feature_ipset_nomatch) {
2451                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2452             } else {
2453                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2454             }
2455         } else {
2456             push @{$ipset_ruleset->{$name}}, $cmd;
2457         }
2458     }
2459 }
2460
2461 sub round_powerof2 {
2462     my ($int) = @_;
2463
2464     $int--;
2465     $int |= $int >> $_ foreach (1,2,4,8,16);
2466     return ++$int;
2467 }
2468
2469 sub load_clusterfw_conf {
2470     my ($filename) = @_;
2471
2472     $filename = $clusterfw_conf_filename if !defined($filename);
2473
2474     my $cluster_conf = {};
2475     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2476         $cluster_conf = parse_cluster_fw_rules($filename, $fh);
2477     }
2478
2479     return $cluster_conf;
2480 }
2481
2482 sub save_clusterfw_conf {
2483     my ($cluster_conf) = @_;
2484
2485     my $raw = '';
2486
2487     my $options = $cluster_conf->{options};
2488     $raw .= &$format_options($options) if scalar(keys %$options);
2489
2490     my $aliases = $cluster_conf->{aliases};
2491     $raw .= &$format_aliases($aliases) if scalar(keys %$aliases);
2492
2493     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2494         if (my $comment = $cluster_conf->{ipset_comments}->{$ipset}) {
2495             my $utf8comment = encode('utf8', $comment);
2496             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2497         } else {
2498             $raw .= "[IPSET $ipset]\n\n";
2499         }
2500         my $options = $cluster_conf->{ipset}->{$ipset};
2501         $raw .= &$format_ipset($options);
2502         $raw .= "\n";
2503     }
2504
2505     my $rules = $cluster_conf->{rules};
2506     if (scalar(@$rules)) {
2507         $raw .= "[RULES]\n\n";
2508         $raw .= &$format_rules($rules, 1);
2509         $raw .= "\n";
2510     }
2511
2512     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2513         my $rules = $cluster_conf->{groups}->{$group};
2514         if (my $comment = $cluster_conf->{group_comments}->{$group}) {
2515             my $utf8comment = encode('utf8', $comment);
2516             $raw .= "[group $group] # $utf8comment\n\n";
2517         } else {
2518             $raw .= "[group $group]\n\n";
2519         }
2520
2521         $raw .= &$format_rules($rules, 0);
2522         $raw .= "\n";
2523     }
2524
2525     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2526 }
2527
2528 sub load_hostfw_conf {
2529     my ($filename) = @_;
2530
2531     $filename = $hostfw_conf_filename if !defined($filename);
2532
2533     my $hostfw_conf = {};
2534     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2535         $hostfw_conf = parse_host_fw_rules($filename, $fh);
2536     }
2537     return $hostfw_conf;
2538 }
2539
2540 sub save_hostfw_conf {
2541     my ($hostfw_conf) = @_;
2542
2543     my $raw = '';
2544
2545     my $options = $hostfw_conf->{options};
2546     $raw .= &$format_options($options) if scalar(keys %$options);
2547
2548     my $rules = $hostfw_conf->{rules};
2549     if (scalar(@$rules)) {
2550         $raw .= "[RULES]\n\n";
2551         $raw .= &$format_rules($rules, 1);
2552         $raw .= "\n";
2553     }
2554
2555     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2556 }
2557
2558 sub compile {
2559     my ($cluster_conf, $hostfw_conf, $vmdata) = @_;
2560
2561     my $vmfw_configs;
2562
2563     if ($vmdata) { # test mode
2564         my $testdir = $vmdata->{testdir} || die "no test directory specified";
2565         my $filename = "$testdir/cluster.fw";
2566         die "missing test file '$filename'\n" if ! -f $filename;
2567         $cluster_conf = load_clusterfw_conf($filename);
2568
2569         $filename = "$testdir/host.fw";
2570         die "missing test file '$filename'\n" if ! -f $filename;
2571         $hostfw_conf = load_hostfw_conf($filename);
2572
2573         $vmfw_configs = read_vm_firewall_configs($vmdata, $testdir);
2574     } else { # normal operation
2575         $cluster_conf = load_clusterfw_conf() if !$cluster_conf;
2576
2577         $hostfw_conf = load_hostfw_conf() if !$hostfw_conf;
2578
2579         $vmdata = read_local_vm_config();
2580         $vmfw_configs = read_vm_firewall_configs($vmdata);
2581     }
2582
2583
2584     $cluster_conf->{ipset}->{venet0} = [];
2585
2586     my $ruleset = {};
2587
2588     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2589     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2590
2591     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2592
2593     my $hostfw_options = $hostfw_conf->{options} || {};
2594
2595     # fixme: what log level should we use here?
2596     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2597
2598     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
2599
2600     ruleset_create_chain($ruleset, "PVEFW-VENET-OUT");
2601     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2602     ruleset_addrule($ruleset, "PVEFW-INPUT", "-i venet0 -m set --match-set PVEFW-venet0 src -j PVEFW-VENET-OUT");
2603
2604     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
2605     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $hostfw_options, $cluster_conf, $loglevel);
2606
2607     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
2608
2609     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
2610     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
2611
2612     ruleset_create_chain($ruleset, "PVEFW-VENET-IN");
2613     ruleset_chain_add_input_filters($ruleset, "PVEFW-VENET-IN", $hostfw_options, $cluster_conf, $loglevel);
2614
2615     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2616
2617     generate_std_chains($ruleset, $hostfw_options);
2618
2619     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2620
2621     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2622
2623     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-o venet0 -m set --match-set PVEFW-venet0 dst -j PVEFW-VENET-IN");
2624
2625     # generate firewall rules for QEMU VMs
2626     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2627         my $conf = $vmdata->{qemu}->{$vmid};
2628         my $vmfw_conf = $vmfw_configs->{$vmid};
2629         next if !$vmfw_conf;
2630         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2631
2632         foreach my $netid (keys %$conf) {
2633             next if $netid !~ m/^net(\d+)$/;
2634             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2635             next if !$net->{firewall};
2636             my $iface = "tap${vmid}i$1";
2637
2638             my $macaddr = $net->{macaddr};
2639             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2640                                          $vmfw_conf, $vmid, 'IN');
2641             generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2642                                          $vmfw_conf, $vmid, 'OUT');
2643         }
2644     }
2645
2646     # generate firewall rules for OpenVZ containers
2647     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2648         my $conf = $vmdata->{openvz}->{$vmid};
2649
2650         my $vmfw_conf = $vmfw_configs->{$vmid};
2651         next if !$vmfw_conf;
2652         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2653
2654         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2655             my $ip = $conf->{ip_address}->{value};
2656             $ip =~ s/\s+/,/g;
2657             parse_address_list($ip); # make sure we have a valid $ip list
2658
2659             my @ips = split(',', $ip);
2660
2661             foreach my $singleip (@ips) {
2662                 my $venet0ipset = {};
2663                 $venet0ipset->{cidr} = $singleip;
2664                 push @{$cluster_conf->{ipset}->{venet0}}, $venet0ipset;
2665             }
2666
2667             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'IN');
2668             generate_venet_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2669         }
2670
2671         if ($conf->{netif} && $conf->{netif}->{value}) {
2672             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2673             foreach my $netid (keys %$netif) {
2674                 my $d = $netif->{$netid};
2675
2676                 my $macaddr = $d->{mac};
2677                 my $iface = $d->{host_ifname};
2678                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2679                                              $vmfw_conf, $vmid, 'IN');
2680                 generate_tap_rules_direction($ruleset, $cluster_conf, $hostfw_conf, $iface, $netid, $macaddr,
2681                                              $vmfw_conf, $vmid, 'OUT');
2682             }
2683         }
2684     }
2685
2686     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
2687         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
2688     }
2689
2690     my $ipset_ruleset = {};
2691     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2692
2693     return ($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, $verbose) = @_;
2857
2858     enable_bridge_firewall();
2859
2860     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2861         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2862
2863     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2864
2865     if ($verbose) {
2866         if ($ipset_changes) {
2867             print "ipset changes:\n";
2868             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2869             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2870         }
2871
2872         if ($changes) {
2873             print "iptables changes:\n";
2874             print $cmdlist;
2875         }
2876     }
2877
2878     ipset_restore_cmdlist($ipset_create_cmdlist);
2879
2880     iptables_restore_cmdlist($cmdlist);
2881
2882     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2883
2884     # test: re-read status and check if everything is up to date
2885     my $active_chains = iptables_get_chains();
2886     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2887
2888     my $errors;
2889     foreach my $chain (sort keys %$ruleset) {
2890         my $stat = $statushash->{$chain};
2891         if ($stat->{action} ne 'exists') {
2892             warn "unable to update chain '$chain'\n";
2893             $errors = 1;
2894         }
2895     }
2896
2897     die "unable to apply firewall changes\n" if $errors;
2898
2899     update_nf_conntrack_max($hostfw_conf);
2900
2901     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
2902
2903 }
2904
2905 sub update_nf_conntrack_max {
2906     my ($hostfw_conf) = @_;
2907
2908     my $max = 65536; # reasonable default
2909
2910     my $options = $hostfw_conf->{options} || {};
2911
2912     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2913         $max = $options->{nf_conntrack_max};
2914         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2915     }
2916
2917     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2918     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2919
2920     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2921
2922     if ($current != $max) {
2923         my $hashsize = int($max/4);
2924         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2925         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2926     }
2927 }
2928
2929 sub update_nf_conntrack_tcp_timeout_established {
2930     my ($hostfw_conf) = @_;
2931
2932     my $options = $hostfw_conf->{options} || {};
2933
2934     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
2935
2936     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
2937 }
2938
2939 sub remove_pvefw_chains {
2940
2941     my ($chash, $hooks) = iptables_get_chains();
2942     my $cmdlist = "*filter\n";
2943
2944     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2945         if ($hooks->{$h}) {
2946             $cmdlist .= "-D $h -j PVEFW-$h\n";
2947         }
2948     }
2949
2950     foreach my $chain (keys %$chash) {
2951         $cmdlist .= "-F $chain\n";
2952     }
2953
2954     foreach my $chain (keys %$chash) {
2955         $cmdlist .= "-X $chain\n";
2956     }
2957     $cmdlist .= "COMMIT\n";
2958
2959     iptables_restore_cmdlist($cmdlist);
2960 }
2961
2962 sub update {
2963     my ($verbose) = @_;
2964
2965     my $code = sub {
2966
2967         my $cluster_conf = load_clusterfw_conf();
2968         my $cluster_options = $cluster_conf->{options};
2969
2970         my $enable = $cluster_options->{enable};
2971
2972         die "Firewall is disabled - cannot start\n" if !$enable;
2973
2974         if (!$enable) {
2975             PVE::Firewall::remove_pvefw_chains();
2976             print "Firewall disabled\n" if $verbose;
2977             return;
2978         }
2979
2980         my $hostfw_conf = load_hostfw_conf();
2981
2982         my ($ruleset, $ipset_ruleset) = compile($cluster_conf, $hostfw_conf);
2983
2984         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2985     };
2986
2987     run_locked($code);
2988 }
2989
2990
2991 1;