src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use PVE::INotify;
   9 use PVE::Exception qw(raise raise_param_exc);
  10 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  11 use PVE::Cluster;
  12 use PVE::ProcFSTools;
  13 use PVE::Tools qw($IPV4RE);
  14 use File::Basename;
  15 use File::Path;
  16 use IO::File;
  17 use Net::IP;
  18 use PVE::Tools qw(run_command lock_file);
  19 use Encode;
  20
  21 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  22 my $clusterfw_conf_filename = "/etc/pve/firewall/cluster.fw";
  23
  24 # dynamically include PVE::QemuServer and PVE::OpenVZ
  25 # to avoid dependency problems
  26 my $have_qemu_server;
  27 eval {
  28     require PVE::QemuServer;
  29     $have_qemu_server = 1;
  30 };
  31
  32 my $have_pve_manager;
  33 eval {
  34     require PVE::OpenVZ;
  35     $have_pve_manager = 1;
  36 };
  37
  38 PVE::JSONSchema::register_format('IPv4orCIDR', \&pve_verify_ipv4_or_cidr);
  39 sub pve_verify_ipv4_or_cidr {
  40     my ($cidr, $noerr) = @_;
  41
  42     if ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
  43         return $cidr if Net::IP->new($cidr);
  44         return undef if $noerr;
  45         die Net::IP::Error() . "\n";
  46     }
  47     return undef if $noerr;
  48     die "value does not look like a valid IP address or CIDR network\n";
  49 }
  50
  51 PVE::JSONSchema::register_standard_option('ipset-name', {
  52     description => "IP set name.",
  53     type => 'string',
  54     pattern => '[A-Za-z][A-Za-z0-9\-\_]+',
  55     minLength => 2,
  56     maxLength => 20,
  57 });
  58
  59 my $feature_ipset_nomatch = 0;
  60 eval  {
  61     my (undef, undef, $release) = POSIX::uname();
  62     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
  63         my ($major, $minor) = ($1, $2);
  64         $feature_ipset_nomatch = 1 if ($major > 3) ||
  65             ($major == 3 && $minor >= 7);
  66     }
  67
  68 };
  69
  70 use Data::Dumper;
  71
  72 my $nodename = PVE::INotify::nodename();
  73
  74 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
  75 my $pve_fw_status_filename = "/var/lib/pve-firewall/pvefw.status";
  76
  77 my $default_log_level = 'info';
  78
  79 my $log_level_hash = {
  80     debug => 7,
  81     info => 6,
  82     notice => 5,
  83     warning => 4,
  84     err => 3,
  85     crit => 2,
  86     alert => 1,
  87     emerg => 0,
  88 };
  89
  90 # imported/converted from: /usr/share/shorewall/macro.*
  91 my $pve_fw_macros = {
  92     'Amanda' => [
  93         "Amanda Backup",
  94         { action => 'PARAM', proto => 'udp', dport => '10080' },
  95         { action => 'PARAM', proto => 'tcp', dport => '10080' },
  96     ],
  97     'Auth' => [
  98         "Auth (identd) traffic",
  99         { action => 'PARAM', proto => 'tcp', dport => '113' },
 100     ],
 101     'BGP' => [
 102         "Border Gateway Protocol traffic",
 103         { action => 'PARAM', proto => 'tcp', dport => '179' },
 104     ],
 105     'BitTorrent' => [
 106         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 107         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 108         { action => 'PARAM', proto => 'udp', dport => '6881' },
 109     ],
 110     'BitTorrent32' => [
 111         "BitTorrent traffic for BitTorrent 3.2 and later",
 112         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 113         { action => 'PARAM', proto => 'udp', dport => '6881' },
 114     ],
 115     'CVS' => [
 116         "Concurrent Versions System pserver traffic",
 117         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 118     ],
 119     'Citrix' => [
 120         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 121         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 122         { action => 'PARAM', proto => 'udp', dport => '1604' },
 123         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 124     ],
 125     'DAAP' => [
 126         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 127         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 128         { action => 'PARAM', proto => 'udp', dport => '3689' },
 129     ],
 130     'DCC' => [
 131         "Distributed Checksum Clearinghouse spam filtering mechanism",
 132         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 133     ],
 134     'DHCPfwd' => [
 135         "Forwarded DHCP traffic (bidirectional)",
 136         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 137         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '67:68', sport => '67:68' },
 138     ],
 139     'DNS' => [
 140         "Domain Name System traffic (upd and tcp)",
 141         { action => 'PARAM', proto => 'udp', dport => '53' },
 142         { action => 'PARAM', proto => 'tcp', dport => '53' },
 143     ],
 144     'Distcc' => [
 145         "Distributed Compiler service",
 146         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 147     ],
 148     'FTP' => [
 149         "File Transfer Protocol",
 150         { action => 'PARAM', proto => 'tcp', dport => '21' },
 151     ],
 152     'Finger' => [
 153         "Finger protocol (RFC 742)",
 154         { action => 'PARAM', proto => 'tcp', dport => '79' },
 155     ],
 156     'GNUnet' => [
 157         "GNUnet secure peer-to-peer networking traffic",
 158         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 159         { action => 'PARAM', proto => 'udp', dport => '2086' },
 160         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 161         { action => 'PARAM', proto => 'udp', dport => '1080' },
 162     ],
 163     'GRE' => [
 164         "Generic Routing Encapsulation tunneling protocol (bidirectional)",
 165         { action => 'PARAM', proto => '47' },
 166         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 167     ],
 168     'Git' => [
 169         "Git distributed revision control traffic",
 170         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 171     ],
 172     'HKP' => [
 173         "OpenPGP HTTP keyserver protocol traffic",
 174         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 175     ],
 176     'HTTP' => [
 177         "Hypertext Transfer Protocol (WWW)",
 178         { action => 'PARAM', proto => 'tcp', dport => '80' },
 179     ],
 180     'HTTPS' => [
 181         "Hypertext Transfer Protocol (WWW) over SSL",
 182         { action => 'PARAM', proto => 'tcp', dport => '443' },
 183     ],
 184     'ICPV2' => [
 185         "Internet Cache Protocol V2 (Squid) traffic",
 186         { action => 'PARAM', proto => 'udp', dport => '3130' },
 187     ],
 188     'ICQ' => [
 189         "AOL Instant Messenger traffic",
 190         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 191     ],
 192     'IMAP' => [
 193         "Internet Message Access Protocol",
 194         { action => 'PARAM', proto => 'tcp', dport => '143' },
 195     ],
 196     'IMAPS' => [
 197         "Internet Message Access Protocol over SSL",
 198         { action => 'PARAM', proto => 'tcp', dport => '993' },
 199     ],
 200     'IPIP' => [
 201         "IPIP capsulation traffic (bidirectional)",
 202         { action => 'PARAM', proto => '94' },
 203         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '94' },
 204     ],
 205     'IPsec' => [
 206         "IPsec traffic (bidirectional)",
 207         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 208         { action => 'PARAM', proto => '50' },
 209         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 210         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 211     ],
 212     'IPsecah' => [
 213         "IPsec authentication (AH) traffic (bidirectional)",
 214         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 215         { action => 'PARAM', proto => '51' },
 216         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500', sport => '500' },
 217         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '51' },
 218     ],
 219     'IPsecnat' => [
 220         "IPsec traffic and Nat-Traversal (bidirectional)",
 221         { action => 'PARAM', proto => 'udp', dport => '500' },
 222         { action => 'PARAM', proto => 'udp', dport => '4500' },
 223         { action => 'PARAM', proto => '50' },
 224         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '500' },
 225         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '4500' },
 226         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '50' },
 227     ],
 228     'IRC' => [
 229         "Internet Relay Chat traffic",
 230         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 231     ],
 232     'Jetdirect' => [
 233         "HP Jetdirect printing",
 234         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 235     ],
 236     'L2TP' => [
 237         "Layer 2 Tunneling Protocol traffic",
 238         { action => 'PARAM', proto => 'udp', dport => '1701' },
 239         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1701' },
 240     ],
 241     'LDAP' => [
 242         "Lightweight Directory Access Protocol traffic",
 243         { action => 'PARAM', proto => 'tcp', dport => '389' },
 244     ],
 245     'LDAPS' => [
 246         "Secure Lightweight Directory Access Protocol traffic",
 247         { action => 'PARAM', proto => 'tcp', dport => '636' },
 248     ],
 249     'MSNP' => [
 250         "Microsoft Notification Protocol",
 251         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 252     ],
 253     'MSSQL' => [
 254         "Microsoft SQL Server",
 255         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 256     ],
 257     'Mail' => [
 258         "Mail traffic (SMTP, SMTPS, Submission)",
 259         { action => 'PARAM', proto => 'tcp', dport => '25' },
 260         { action => 'PARAM', proto => 'tcp', dport => '465' },
 261         { action => 'PARAM', proto => 'tcp', dport => '587' },
 262     ],
 263     'Munin' => [
 264         "Munin networked resource monitoring traffic",
 265         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 266     ],
 267     'MySQL' => [
 268         "MySQL server",
 269         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 270     ],
 271     'NNTP' => [
 272         "NNTP traffic (Usenet).",
 273         { action => 'PARAM', proto => 'tcp', dport => '119' },
 274     ],
 275     'NNTPS' => [
 276         "Encrypted NNTP traffic (Usenet)",
 277         { action => 'PARAM', proto => 'tcp', dport => '563' },
 278     ],
 279     'NTP' => [
 280         "Network Time Protocol (ntpd)",
 281         { action => 'PARAM', proto => 'udp', dport => '123' },
 282     ],
 283     'NTPbi' => [
 284         "Bi-directional NTP (for NTP peers)",
 285         { action => 'PARAM', proto => 'udp', dport => '123' },
 286         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '123' },
 287     ],
 288     'OSPF' => [
 289         "OSPF multicast traffic",
 290         { action => 'PARAM', proto => '89' },
 291     ],
 292     'OpenVPN' => [
 293         "OpenVPN traffic",
 294         { action => 'PARAM', proto => 'udp', dport => '1194' },
 295     ],
 296     'PCA' => [
 297         "Symantec PCAnywere (tm)",
 298         { action => 'PARAM', proto => 'udp', dport => '5632' },
 299         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 300     ],
 301     'POP3' => [
 302         "POP3 traffic",
 303         { action => 'PARAM', proto => 'tcp', dport => '110' },
 304     ],
 305     'POP3S' => [
 306         "Encrypted POP3 traffic",
 307         { action => 'PARAM', proto => 'tcp', dport => '995' },
 308     ],
 309     'PPtP' => [
 310         "Point-to-Point Tunneling Protocol",
 311         { action => 'PARAM', proto => '47' },
 312         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => '47' },
 313         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 314     ],
 315     'Ping' => [
 316         "ICMP echo request",
 317         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 318     ],
 319     'PostgreSQL' => [
 320         "PostgreSQL server",
 321         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 322     ],
 323     'Printer' => [
 324         "Line Printer protocol printing",
 325         { action => 'PARAM', proto => 'tcp', dport => '515' },
 326     ],
 327     'RDP' => [
 328         "Microsoft Remote Desktop Protocol traffic",
 329         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 330     ],
 331     'RIPbi' => [
 332         "Routing Information Protocol (bidirectional)",
 333         { action => 'PARAM', proto => 'udp', dport => '520' },
 334         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '520' },
 335     ],
 336     'RNDC' => [
 337         "BIND remote management protocol",
 338         { action => 'PARAM', proto => 'tcp', dport => '953' },
 339     ],
 340     'Razor' => [
 341         "Razor Antispam System",
 342         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 343     ],
 344     'Rdate' => [
 345         "Remote time retrieval (rdate)",
 346         { action => 'PARAM', proto => 'tcp', dport => '37' },
 347     ],
 348     'Rsync' => [
 349         "Rsync server",
 350         { action => 'PARAM', proto => 'tcp', dport => '873' },
 351     ],
 352     'SANE' => [
 353         "SANE network scanning",
 354         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 355     ],
 356     'SMB' => [
 357         "Microsoft SMB traffic",
 358         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 359         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 360         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 361         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 362     ],
 363     'SMBBI' => [
 364         "Microsoft SMB traffic (bidirectional)",
 365         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 366         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 367         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 368         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 369         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '135,445' },
 370         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '137:139' },
 371         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'udp', dport => '1024:65535', sport => '137' },
 372         { action => 'PARAM', source => 'DEST', dest => 'SOURCE', proto => 'tcp', dport => '135,139,445' },
 373     ],
 374     'SMBswat' => [
 375         "Samba Web Administration Tool",
 376         { action => 'PARAM', proto => 'tcp', dport => '901' },
 377     ],
 378     'SMTP' => [
 379         "Simple Mail Transfer Protocol",
 380         { action => 'PARAM', proto => 'tcp', dport => '25' },
 381     ],
 382     'SMTPS' => [
 383         "Encrypted Simple Mail Transfer Protocol",
 384         { action => 'PARAM', proto => 'tcp', dport => '465' },
 385     ],
 386     'SNMP' => [
 387         "Simple Network Management Protocol",
 388         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 389         { action => 'PARAM', proto => 'tcp', dport => '161' },
 390     ],
 391     'SPAMD' => [
 392         "Spam Assassin SPAMD traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '783' },
 394     ],
 395     'SSH' => [
 396         "Secure shell traffic",
 397         { action => 'PARAM', proto => 'tcp', dport => '22' },
 398     ],
 399     'SVN' => [
 400         "Subversion server (svnserve)",
 401         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 402     ],
 403     'SixXS' => [
 404         "SixXS IPv6 Deployment and Tunnel Broker",
 405         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 406         { action => 'PARAM', proto => 'udp', dport => '3740' },
 407         { action => 'PARAM', proto => '41' },
 408         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 409     ],
 410     'Squid' => [
 411         "Squid web proxy traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 413     ],
 414     'Submission' => [
 415         "Mail message submission traffic",
 416         { action => 'PARAM', proto => 'tcp', dport => '587' },
 417     ],
 418     'Syslog' => [
 419         "Syslog protocol (RFC 5424) traffic",
 420         { action => 'PARAM', proto => 'udp', dport => '514' },
 421         { action => 'PARAM', proto => 'tcp', dport => '514' },
 422     ],
 423     'TFTP' => [
 424         "Trivial File Transfer Protocol traffic",
 425         { action => 'PARAM', proto => 'udp', dport => '69' },
 426     ],
 427     'Telnet' => [
 428         "Telnet traffic",
 429         { action => 'PARAM', proto => 'tcp', dport => '23' },
 430     ],
 431     'Telnets' => [
 432         "Telnet over SSL",
 433         { action => 'PARAM', proto => 'tcp', dport => '992' },
 434     ],
 435     'Time' => [
 436         "RFC 868 Time protocol",
 437         { action => 'PARAM', proto => 'tcp', dport => '37' },
 438     ],
 439     'Trcrt' => [
 440         "Traceroute (for up to 30 hops) traffic",
 441         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 442         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 443     ],
 444     'VNC' => [
 445         "VNC traffic for VNC display's 0 - 9",
 446         { action => 'PARAM', proto => 'tcp', dport => '5900:5909' },
 447     ],
 448     'VNCL' => [
 449         "VNC traffic from Vncservers to Vncviewers in listen mode",
 450         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 451     ],
 452     'Web' => [
 453         "WWW traffic (HTTP and HTTPS)",
 454         { action => 'PARAM', proto => 'tcp', dport => '80' },
 455         { action => 'PARAM', proto => 'tcp', dport => '443' },
 456     ],
 457     'Webcache' => [
 458         "Web Cache/Proxy traffic (port 8080)",
 459         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 460     ],
 461     'Webmin' => [
 462         "Webmin traffic",
 463         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 464     ],
 465     'Whois' => [
 466         "Whois (nicname, RFC 3912) traffic",
 467         { action => 'PARAM', proto => 'tcp', dport => '43' },
 468     ],
 469 };
 470
 471 my $pve_fw_parsed_macros;
 472 my $pve_fw_macro_descr;
 473 my $pve_fw_preferred_macro_names = {};
 474
 475 my $pve_std_chains = {
 476     'PVEFW-SET-ACCEPT-MARK' => [
 477         "-j MARK --set-mark 1",
 478     ],
 479     'PVEFW-DropBroadcast' => [
 480         # same as shorewall 'Broadcast'
 481         # simply DROP BROADCAST/MULTICAST/ANYCAST
 482         # we can use this to reduce logging
 483         { action => 'DROP', dsttype => 'BROADCAST' },
 484         { action => 'DROP', dsttype => 'MULTICAST' },
 485         { action => 'DROP', dsttype => 'ANYCAST' },
 486         { action => 'DROP', dest => '224.0.0.0/4' },
 487     ],
 488     'PVEFW-reject' => [
 489         # same as shorewall 'reject'
 490         { action => 'DROP', dsttype => 'BROADCAST' },
 491         { action => 'DROP', source => '224.0.0.0/4' },
 492         { action => 'DROP', proto => 'icmp' },
 493         "-p tcp -j REJECT --reject-with tcp-reset",
 494         "-p udp -j REJECT --reject-with icmp-port-unreachable",
 495         "-p icmp -j REJECT --reject-with icmp-host-unreachable",
 496         "-j REJECT --reject-with icmp-host-prohibited",
 497     ],
 498     'PVEFW-Drop' => [
 499         # same as shorewall 'Drop', which is equal to DROP,
 500         # but REJECT/DROP some packages to reduce logging,
 501         # and ACCEPT critical ICMP types
 502         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 503         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 504         { action => 'PVEFW-DropBroadcast' },
 505         # ACCEPT critical ICMP types
 506         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 507         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 508         # Drop packets with INVALID state
 509         "-m conntrack --ctstate INVALID -j DROP",
 510         # Drop Microsoft SMB noise
 511         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 512         { action => 'DROP', proto => 'udp', dport => '137:139'},
 513         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 514         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 515         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 516         # Drop new/NotSyn traffic so that it doesn't get logged
 517         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 518         # Drop DNS replies
 519         { action => 'DROP', proto => 'udp', sport => 53 },
 520     ],
 521     'PVEFW-Reject' => [
 522         # same as shorewall 'Reject', which is equal to Reject,
 523         # but REJECT/DROP some packages to reduce logging,
 524         # and ACCEPT critical ICMP types
 525         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 526         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 527         { action => 'PVEFW-DropBroadcast' },
 528         # ACCEPT critical ICMP types
 529         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 530         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 531         # Drop packets with INVALID state
 532         "-m conntrack --ctstate INVALID -j DROP",
 533         # Drop Microsoft SMB noise
 534         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 535         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 536         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 537         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 538         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 539         # Drop new/NotSyn traffic so that it doesn't get logged
 540         "-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -j DROP",
 541         # Drop DNS replies
 542         { action => 'DROP', proto => 'udp', sport => 53 },
 543     ],
 544     'PVEFW-tcpflags' => [
 545         # same as shorewall tcpflags action.
 546         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 547         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG -g PVEFW-logflags",
 548         "-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -g PVEFW-logflags",
 549         "-p tcp -m tcp --tcp-flags SYN,RST SYN,RST -g PVEFW-logflags",
 550         "-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN -g PVEFW-logflags",
 551         "-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN -g PVEFW-logflags",
 552     ],
 553     'PVEFW-smurfs' => [
 554         # same as shorewall smurfs action
 555         # Filter packets for smurfs (packets with a broadcast address as the source).
 556         "-s 0.0.0.0/32 -j RETURN",
 557         "-m addrtype --src-type BROADCAST -g PVEFW-smurflog",
 558         "-s 224.0.0.0/4 -g PVEFW-smurflog",
 559     ],
 560 };
 561
 562 # iptables -p icmp -h
 563 my $icmp_type_names = {
 564     any => 1,
 565     'echo-reply' => 1,
 566     'destination-unreachable' => 1,
 567     'network-unreachable' => 1,
 568     'host-unreachable' => 1,
 569     'protocol-unreachable' => 1,
 570     'port-unreachable' => 1,
 571     'fragmentation-needed' => 1,
 572     'source-route-failed' => 1,
 573     'network-unknown' => 1,
 574     'host-unknown' => 1,
 575     'network-prohibited' => 1,
 576     'host-prohibited' => 1,
 577     'TOS-network-unreachable' => 1,
 578     'TOS-host-unreachable' => 1,
 579     'communication-prohibited' => 1,
 580     'host-precedence-violation' => 1,
 581     'precedence-cutoff' => 1,
 582     'source-quench' => 1,
 583     'redirect' => 1,
 584     'network-redirect' => 1,
 585     'host-redirect' => 1,
 586     'TOS-network-redirect' => 1,
 587     'TOS-host-redirect' => 1,
 588     'echo-request' => 1,
 589     'router-advertisement' => 1,
 590     'router-solicitation' => 1,
 591     'time-exceeded' => 1,
 592     'ttl-zero-during-transit' => 1,
 593     'ttl-zero-during-reassembly' => 1,
 594     'parameter-problem' => 1,
 595     'ip-header-bad' => 1,
 596     'required-option-missing' => 1,
 597     'timestamp-request' => 1,
 598     'timestamp-reply' => 1,
 599     'address-mask-request' => 1,
 600     'address-mask-reply' => 1,
 601 };
 602
 603 sub init_firewall_macros {
 604
 605     $pve_fw_parsed_macros = {};
 606
 607     foreach my $k (keys %$pve_fw_macros) {
 608         my $lc_name = lc($k);
 609         my $macro = $pve_fw_macros->{$k};
 610         if (!ref($macro->[0])) {
 611             $pve_fw_macro_descr->{$k} = shift @$macro;
 612         }
 613         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 614         $pve_fw_parsed_macros->{$k} = $macro;
 615     }
 616 }
 617
 618 init_firewall_macros();
 619
 620 sub get_macros {
 621     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 622 }
 623
 624 my $etc_services;
 625
 626 sub get_etc_services {
 627
 628     return $etc_services if $etc_services;
 629
 630     my $filename = "/etc/services";
 631
 632     my $fh = IO::File->new($filename, O_RDONLY);
 633     if (!$fh) {
 634         warn "unable to read '$filename' - $!\n";
 635         return {};
 636     }
 637
 638     my $services = {};
 639
 640     while (my $line = <$fh>) {
 641         chomp ($line);
 642         next if $line =~m/^#/;
 643         next if ($line =~m/^\s*$/);
 644
 645         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 646             $services->{byid}->{$2}->{name} = $1;
 647             $services->{byid}->{$2}->{port} = $2;
 648             $services->{byid}->{$2}->{$3} = 1;
 649             $services->{byname}->{$1} = $services->{byid}->{$2};
 650         }
 651     }
 652
 653     close($fh);
 654
 655     $etc_services = $services;
 656
 657
 658     return $etc_services;
 659 }
 660
 661 my $etc_protocols;
 662
 663 sub get_etc_protocols {
 664     return $etc_protocols if $etc_protocols;
 665
 666     my $filename = "/etc/protocols";
 667
 668     my $fh = IO::File->new($filename, O_RDONLY);
 669     if (!$fh) {
 670         warn "unable to read '$filename' - $!\n";
 671         return {};
 672     }
 673
 674     my $protocols = {};
 675
 676     while (my $line = <$fh>) {
 677         chomp ($line);
 678         next if $line =~m/^#/;
 679         next if ($line =~m/^\s*$/);
 680
 681         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 682             $protocols->{byid}->{$2}->{name} = $1;
 683             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 684         }
 685     }
 686
 687     close($fh);
 688
 689     $etc_protocols = $protocols;
 690
 691     return $etc_protocols;
 692 }
 693
 694 sub parse_address_list {
 695     my ($str) = @_;
 696
 697     return if $str =~ m/^(\+)(\S+)$/; # ipset ref
 698
 699     my $count = 0;
 700     my $iprange = 0;
 701     foreach my $elem (split(/,/, $str)) {
 702         $count++;
 703         if (!Net::IP->new($elem)) {
 704             my $err = Net::IP::Error();
 705             die "invalid IP address: $err\n";
 706         }
 707         $iprange = 1 if $elem =~ m/-/;
 708     }
 709
 710     die "you can use a range in a list\n" if $iprange && $count > 1;
 711 }
 712
 713 sub parse_port_name_number_or_range {
 714     my ($str) = @_;
 715
 716     my $services = PVE::Firewall::get_etc_services();
 717     my $count = 0;
 718     my $icmp_port = 0;
 719
 720     foreach my $item (split(/,/, $str)) {
 721         $count++;
 722         if ($item =~ m/^(\d+):(\d+)$/) {
 723             my ($port1, $port2) = ($1, $2);
 724             die "invalid port '$port1'\n" if $port1 > 65535;
 725             die "invalid port '$port2'\n" if $port2 > 65535;
 726         } elsif ($item =~ m/^(\d+)$/) {
 727             my $port = $1;
 728             die "invalid port '$port'\n" if $port > 65535;
 729         } else {
 730             if ($icmp_type_names->{$item}) {
 731                 $icmp_port = 1;
 732             } else {
 733                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
 734             }
 735         }
 736     }
 737
 738     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
 739
 740     return $count;
 741 }
 742
 743 PVE::JSONSchema::register_format('pve-fw-port-spec', \&pve_fw_verify_port_spec);
 744 sub pve_fw_verify_port_spec {
 745    my ($portstr) = @_;
 746
 747    parse_port_name_number_or_range($portstr);
 748
 749    return $portstr;
 750 }
 751
 752 PVE::JSONSchema::register_format('pve-fw-v4addr-spec', \&pve_fw_verify_v4addr_spec);
 753 sub pve_fw_verify_v4addr_spec {
 754    my ($list) = @_;
 755
 756    parse_address_list($list);
 757
 758    return $list;
 759 }
 760
 761 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
 762 sub pve_fw_verify_protocol_spec {
 763    my ($proto) = @_;
 764
 765    my $protocols = get_etc_protocols();
 766
 767    die "unknown protocol '$proto'\n" if $proto &&
 768        !(defined($protocols->{byname}->{$proto}) ||
 769          defined($protocols->{byid}->{$proto}));
 770
 771    return $proto;
 772 }
 773
 774
 775 # helper function for API
 776
 777 my $rule_properties = {
 778     pos => {
 779         description => "Update rule at position <pos>.",
 780         type => 'integer',
 781         minimum => 0,
 782         optional => 1,
 783     },
 784     digest => {
 785         type => 'string',
 786         optional => 1,
 787         maxLength => 27,
 788         minLength => 27,
 789     },
 790     type => {
 791         type => 'string',
 792         optional => 1,
 793         enum => ['in', 'out', 'group'],
 794     },
 795     action => {
 796         type => 'string',
 797         optional => 1,
 798         enum => ['ACCEPT', 'DROP', 'REJECT'],
 799     },
 800     macro => {
 801         type => 'string',
 802         optional => 1,
 803         maxLength => 128,
 804     },
 805     iface => get_standard_option('pve-iface', { optional => 1 }),
 806     source => {
 807         type => 'string', format => 'pve-fw-v4addr-spec',
 808         optional => 1,
 809     },
 810     dest => {
 811         type => 'string', format => 'pve-fw-v4addr-spec',
 812         optional => 1,
 813     },
 814     proto => {
 815         type => 'string', format => 'pve-fw-protocol-spec',
 816         optional => 1,
 817     },
 818     enable => {
 819         type => 'boolean',
 820         optional => 1,
 821     },
 822     sport => {
 823         type => 'string', format => 'pve-fw-port-spec',
 824         optional => 1,
 825     },
 826     dport => {
 827         type => 'string', format => 'pve-fw-port-spec',
 828         optional => 1,
 829     },
 830     comment => {
 831         type => 'string',
 832         optional => 1,
 833     },
 834 };
 835
 836 sub cleanup_fw_rule {
 837     my ($rule, $digest, $pos) = @_;
 838
 839     my $r = {};
 840
 841     foreach my $k (keys %$rule) {
 842         next if !$rule_properties->{$k};
 843         my $v = $rule->{$k};
 844         next if !defined($v);
 845         $r->{$k} = $v;
 846         $r->{digest} = $digest;
 847         $r->{pos} = $pos;
 848     }
 849
 850     return $r;
 851 }
 852
 853 sub add_rule_properties {
 854     my ($properties) = @_;
 855
 856     foreach my $k (keys %$rule_properties) {
 857         my $h = $rule_properties->{$k};
 858         # copy data, so that we can modify later without side effects
 859         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
 860     }
 861
 862     return $properties;
 863 }
 864
 865 sub delete_rule_properties {
 866     my ($rule, $delete_str) = @_;
 867
 868     foreach my $opt (PVE::Tools::split_list($delete_str)) {
 869         raise_param_exc({ 'delete' => "no such property ('$opt')"})
 870             if !defined($rule_properties->{$opt});
 871         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
 872             if $opt eq 'type' || $opt eq 'action';
 873         delete $rule->{$opt};
 874     }
 875
 876     return $rule;
 877 }
 878
 879 my $apply_macro = sub {
 880     my ($macro_name, $param, $verify) = @_;
 881
 882     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
 883     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
 884
 885     my $rules = [];
 886
 887     foreach my $templ (@$macro_rules) {
 888         my $rule = {};
 889         my $param_used = {};
 890         foreach my $k (keys %$templ) {
 891             my $v = $templ->{$k};
 892             if ($v eq 'PARAM') {
 893                 $v = $param->{$k};
 894                 $param_used->{$k} = 1;
 895             } elsif ($v eq 'DEST') {
 896                 $v = $param->{dest};
 897                 $param_used->{dest} = 1;
 898             } elsif ($v eq 'SOURCE') {
 899                 $v = $param->{source};
 900                 $param_used->{source} = 1;
 901             }
 902
 903             if (!defined($v)) {
 904                 my $msg = "missing parameter '$k' in macro '$macro_name'";
 905                 raise_param_exc({ macro => $msg }) if $verify;
 906                 die "$msg\n";
 907             }
 908             $rule->{$k} = $v;
 909         }
 910         foreach my $k (keys %$param) {
 911             next if $k eq 'macro';
 912             next if !defined($param->{$k});
 913             next if $param_used->{$k};
 914             if (defined($rule->{$k})) {
 915                 if ($rule->{$k} ne $param->{$k}) {
 916                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
 917                     raise_param_exc({ $k => $msg }) if $verify;
 918                     die "$msg\n";
 919                 }
 920             } else {
 921                 $rule->{$k} = $param->{$k};
 922             }
 923         }
 924         push @$rules, $rule;
 925     }
 926
 927     return $rules;
 928 };
 929
 930 sub verify_rule {
 931     my ($rule, $allow_groups) = @_;
 932
 933     my $type = $rule->{type};
 934
 935     raise_param_exc({ type => "missing property"}) if !$type;
 936     raise_param_exc({ action => "missing property"}) if !$rule->{action};
 937
 938     if ($type eq  'in' || $type eq 'out') {
 939         raise_param_exc({ action => "unknown action '$rule->{action}'"})
 940             if $rule->{action} !~ m/^(ACCEPT|DROP|REJECT)$/;
 941     } elsif ($type eq 'group') {
 942         raise_param_exc({ type => "security groups not allowed"})
 943             if !$allow_groups;
 944         raise_param_exc({ action => "invalid characters in security group name"})
 945             if $rule->{action} !~ m/^[A-Za-z0-9_\-]+$/;
 946     } else {
 947         raise_param_exc({ type => "unknown rule type '$type'"});
 948     }
 949
 950     # fixme: verify $rule->{iface}?
 951
 952     if ($rule->{macro}) {
 953         my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})};
 954         raise_param_exc({ macro => "unknown macro '$rule->{macro}'"}) if !$preferred_name;
 955         $rule->{macro} = $preferred_name;
 956     }
 957
 958     if ($rule->{dport}) {
 959         eval { parse_port_name_number_or_range($rule->{dport}); };
 960         raise_param_exc({ dport => $@ }) if $@;
 961     }
 962
 963     if ($rule->{sport}) {
 964         eval { parse_port_name_number_or_range($rule->{sport}); };
 965         raise_param_exc({ sport => $@ }) if $@;
 966     }
 967
 968     if ($rule->{source}) {
 969         eval { parse_address_list($rule->{source}); };
 970         raise_param_exc({ source => $@ }) if $@;
 971     }
 972
 973     if ($rule->{dest}) {
 974         eval { parse_address_list($rule->{dest}); };
 975         raise_param_exc({ dest => $@ }) if $@;
 976     }
 977
 978     if ($rule->{macro}) {
 979         &$apply_macro($rule->{macro}, $rule, 1);
 980     }
 981
 982     return $rule;
 983 }
 984
 985 sub copy_rule_data {
 986     my ($rule, $param) = @_;
 987
 988     foreach my $k (keys %$rule_properties) {
 989         if (defined(my $v = $param->{$k})) {
 990             if ($v eq '' || $v eq '-') {
 991                 delete $rule->{$k};
 992             } else {
 993                 $rule->{$k} = $v;
 994             }
 995         } else {
 996             delete $rule->{$k};
 997         }
 998     }
 999
1000     # verify rule now
1001
1002     return $rule;
1003 }
1004
1005 # core functions
1006 my $bridge_firewall_enabled = 0;
1007
1008 sub enable_bridge_firewall {
1009
1010     return if $bridge_firewall_enabled; # only once
1011
1012     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1013     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1014
1015     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1016     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1017
1018     $bridge_firewall_enabled = 1;
1019 }
1020
1021 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1022
1023 sub iptables_restore_cmdlist {
1024     my ($cmdlist) = @_;
1025
1026     run_command("/sbin/iptables-restore -n", input => $cmdlist);
1027 }
1028
1029 sub ipset_restore_cmdlist {
1030     my ($cmdlist) = @_;
1031
1032     run_command("/usr/sbin/ipset restore", input => $cmdlist);
1033 }
1034
1035 sub iptables_get_chains {
1036
1037     my $res = {};
1038
1039     # check what chains we want to track
1040     my $is_pvefw_chain = sub {
1041         my $name = shift;
1042
1043         return 1 if $name =~ m/^PVEFW-\S+$/;
1044
1045         return 1 if $name =~ m/^tap\d+i\d+-(:?IN|OUT)$/;
1046
1047         return 1 if $name =~ m/^veth\d+.\d+-(:?IN|OUT)$/; # fixme: dev name is configurable
1048
1049         return 1 if $name =~ m/^venet0-\d+-(:?IN|OUT)$/;
1050
1051         return 1 if $name =~ m/^vmbr\d+-(:?FW|IN|OUT|IPS)$/;
1052         return 1 if $name =~ m/^GROUP-(:?[^\s\-]+)-(:?IN|OUT)$/;
1053
1054         return undef;
1055     };
1056
1057     my $table = '';
1058
1059     my $hooks = {};
1060
1061     my $parser = sub {
1062         my $line = shift;
1063
1064         return if $line =~ m/^#/;
1065         return if $line =~ m/^\s*$/;
1066
1067         if ($line =~ m/^\*(\S+)$/) {
1068             $table = $1;
1069             return;
1070         }
1071
1072         return if $table ne 'filter';
1073
1074         if ($line =~ m/^:(\S+)\s/) {
1075             my $chain = $1;
1076             return if !&$is_pvefw_chain($chain);
1077             $res->{$chain} = "unknown";
1078         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1079             my ($chain, $sig) = ($1, $2);
1080             return if !&$is_pvefw_chain($chain);
1081             $res->{$chain} = $sig;
1082         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1083             $hooks->{$1} = 1;
1084         } else {
1085             # simply ignore the rest
1086             return;
1087         }
1088     };
1089
1090     run_command("/sbin/iptables-save", outfunc => $parser);
1091
1092     return wantarray ? ($res, $hooks) : $res;
1093 }
1094
1095 sub iptables_chain_digest {
1096     my ($rules) = @_;
1097     my $digest = Digest::SHA->new('sha1');
1098     foreach my $rule (@$rules) { # order is important
1099         $digest->add($rule);
1100     }
1101     return $digest->b64digest;
1102 }
1103
1104 sub ipset_chain_digest {
1105     my ($rules) = @_;
1106
1107     my $digest = Digest::SHA->new('sha1');
1108     foreach my $rule (sort @$rules) { # note: sorted
1109         $digest->add($rule);
1110     }
1111     return $digest->b64digest;
1112 }
1113
1114 sub ipset_get_chains {
1115
1116     my $res = {};
1117     my $chains = {};
1118
1119     my $parser = sub {
1120         my $line = shift;
1121
1122         return if $line =~ m/^#/;
1123         return if $line =~ m/^\s*$/;
1124         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1125             my $chain = $1;
1126             $line =~ s/\s+$//; # delete trailing white space
1127             push @{$chains->{$chain}}, $line;
1128         } else {
1129             # simply ignore the rest
1130             return;
1131         }
1132     };
1133
1134     run_command("/usr/sbin/ipset save", outfunc => $parser);
1135
1136     # compute digest for each chain
1137     foreach my $chain (keys %$chains) {
1138         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1139     }
1140
1141     return $res;
1142 }
1143
1144 sub ruleset_generate_cmdstr {
1145     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1146
1147     return if defined($rule->{enable}) && !$rule->{enable};
1148
1149     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1150
1151     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}) : 0;
1152     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}) : 0;
1153
1154     my @cmd = ();
1155
1156     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1157     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1158
1159     my $source = $rule->{source};
1160     my $dest = $rule->{dest};
1161
1162     if ($source) {
1163         if ($source =~ m/^(\+)(\S+)$/) {
1164             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1165             push @cmd, "-m set --match-set PVEFW-$2 src";
1166
1167         } elsif ($source =~ m/\-/){
1168             push @cmd, "-m iprange --src-range $source";
1169
1170         } else {
1171             push @cmd, "-s $source";
1172         }
1173     }
1174
1175     if ($dest) {
1176         if ($dest =~ m/^(\+)(\S+)$/) {
1177             die "no such ipset $2" if !$cluster_conf->{ipset}->{$2};
1178             push @cmd, "-m set --match-set PVEFW-$2 dst";
1179
1180         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1181             push @cmd, "-m iprange --dst-range $dest";
1182
1183         } else {
1184             push @cmd, "-s $dest";
1185         }
1186     }
1187
1188     if ($rule->{proto}) {
1189         push @cmd, "-p $rule->{proto}";
1190
1191         my $multiport = 0;
1192         $multiport++ if $nbdport > 1;
1193         $multiport++ if $nbsport > 1;
1194
1195         push @cmd, "--match multiport" if $multiport;
1196
1197         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1198             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1199
1200         if ($rule->{dport}) {
1201             if ($rule->{proto} && $rule->{proto} eq 'icmp') {
1202                 # Note: we use dport to store --icmp-type
1203                 die "unknown icmp-type '$rule->{dport}'\n" if !defined($icmp_type_names->{$rule->{dport}});
1204                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1205             } else {
1206                 if ($nbdport > 1) {
1207                     if ($multiport == 2) {
1208                         push @cmd,  "--ports $rule->{dport}";
1209                     } else {
1210                         push @cmd, "--dports $rule->{dport}";
1211                     }
1212                 } else {
1213                     push @cmd, "--dport $rule->{dport}";
1214                 }
1215             }
1216         }
1217
1218         if ($rule->{sport}) {
1219             if ($nbsport > 1) {
1220                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1221             } else {
1222                 push @cmd, "--sport $rule->{sport}";
1223             }
1224         }
1225     } elsif ($rule->{dport} || $rule->{sport}) {
1226         warn "ignoring destination port '$rule->{dport}' - no protocol specified\n" if $rule->{dport};
1227         warn "ignoring source port '$rule->{sport}' - no protocol specified\n" if $rule->{sport};
1228     }
1229
1230     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1231
1232     if (my $action = $rule->{action}) {
1233         $action = $actions->{$action} if defined($actions->{$action});
1234         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1235         push @cmd, $goto ? "-g $action" : "-j $action";
1236     }
1237
1238     return scalar(@cmd) ? join(' ', @cmd) : undef;
1239 }
1240
1241 sub ruleset_generate_rule {
1242     my ($ruleset, $chain, $rule, $actions, $goto, $cluster_conf) = @_;
1243
1244     my $rules;
1245
1246     if ($rule->{macro}) {
1247         $rules = &$apply_macro($rule->{macro}, $rule);
1248     } else {
1249         $rules = [ $rule ];
1250     }
1251
1252     foreach my $tmp (@$rules) {
1253         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $tmp, $actions, $goto, $cluster_conf)) {
1254             ruleset_addrule($ruleset, $chain, $cmdstr);
1255         }
1256     }
1257 }
1258
1259 sub ruleset_generate_rule_insert {
1260     my ($ruleset, $chain, $rule, $actions, $goto) = @_;
1261
1262     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1263
1264     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $rule, $actions, $goto)) {
1265         ruleset_insertrule($ruleset, $chain, $cmdstr);
1266     }
1267 }
1268
1269 sub ruleset_create_chain {
1270     my ($ruleset, $chain) = @_;
1271
1272     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1273     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1274
1275     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1276
1277     $ruleset->{$chain} = [];
1278 }
1279
1280 sub ruleset_chain_exist {
1281     my ($ruleset, $chain) = @_;
1282
1283     return $ruleset->{$chain} ? 1 : undef;
1284 }
1285
1286 sub ruleset_addrule {
1287    my ($ruleset, $chain, $rule) = @_;
1288
1289    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1290
1291    push @{$ruleset->{$chain}}, "-A $chain $rule";
1292 }
1293
1294 sub ruleset_insertrule {
1295    my ($ruleset, $chain, $rule) = @_;
1296
1297    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1298
1299    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1300 }
1301
1302 sub get_log_rule_base {
1303     my ($chain, $vmid, $msg, $loglevel) = @_;
1304
1305     die "internal error - no log level" if !defined($loglevel);
1306
1307     $vmid = 0 if !defined($vmid);
1308
1309     # Note: we use special format for prefix to pass further
1310     # info to log daemon (VMID, LOGVELEL and CHAIN)
1311
1312     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1313 }
1314
1315 sub ruleset_addlog {
1316     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1317
1318     return if !defined($loglevel);
1319
1320     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1321
1322     $logrule = "$rule $logrule" if defined($rule);
1323
1324     ruleset_addrule($ruleset, $chain, $logrule)
1325 }
1326
1327 sub generate_bridge_chains {
1328     my ($ruleset, $hostfw_conf, $bridge, $routing_table) = @_;
1329
1330     my $options = $hostfw_conf->{options} || {};
1331
1332     die "error: detected direct route to bridge '$bridge'\n"
1333         if !$options->{allow_bridge_route} && $routing_table->{$bridge};
1334
1335     if (!ruleset_chain_exist($ruleset, "$bridge-FW")) {
1336         ruleset_create_chain($ruleset, "$bridge-FW");
1337         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o $bridge -m physdev --physdev-is-out -j $bridge-FW");
1338         ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i $bridge -m physdev --physdev-is-in -j $bridge-FW");
1339     }
1340
1341     if (!ruleset_chain_exist($ruleset, "$bridge-OUT")) {
1342         ruleset_create_chain($ruleset, "$bridge-OUT");
1343         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-in -j $bridge-OUT");
1344         ruleset_insertrule($ruleset, "PVEFW-INPUT", "-i $bridge -m physdev --physdev-is-in -j $bridge-OUT");
1345     }
1346
1347     if (!ruleset_chain_exist($ruleset, "$bridge-IN")) {
1348         ruleset_create_chain($ruleset, "$bridge-IN");
1349         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j $bridge-IN");
1350         ruleset_addrule($ruleset, "$bridge-FW", "-m mark --mark 1 -j ACCEPT");
1351         # accept traffic to unmanaged bridge ports
1352         ruleset_addrule($ruleset, "$bridge-FW", "-m physdev --physdev-is-out -j ACCEPT ");
1353     }
1354 }
1355
1356 sub ruleset_add_chain_policy {
1357     my ($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action) = @_;
1358
1359     if ($policy eq 'ACCEPT') {
1360
1361         ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT' },
1362                               { ACCEPT =>  $accept_action});
1363
1364     } elsif ($policy eq 'DROP') {
1365
1366         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
1367
1368         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1369
1370         ruleset_addrule($ruleset, $chain, "-j DROP");
1371     } elsif ($policy eq 'REJECT') {
1372         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
1373
1374         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
1375
1376         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
1377     } else {
1378         # should not happen
1379         die "internal error: unknown policy '$policy'";
1380     }
1381 }
1382
1383 sub ruleset_create_vm_chain {
1384     my ($ruleset, $chain, $options, $macaddr, $direction) = @_;
1385
1386     ruleset_create_chain($ruleset, $chain);
1387     my $accept = generate_nfqueue($options);
1388
1389     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1390         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1391     }
1392
1393     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
1394         if ($direction eq 'OUT') {
1395             ruleset_generate_rule($ruleset, $chain, { action => 'PVEFW-SET-ACCEPT-MARK',
1396                                                       proto => 'udp', sport => 68, dport => 67 });
1397         } else {
1398             ruleset_generate_rule($ruleset, $chain, { action => 'ACCEPT',
1399                                                       proto => 'udp', sport => 67, dport => 68 });
1400         }
1401     }
1402
1403     if ($options->{tcpflags}) {
1404         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1405     }
1406
1407     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1408     if ($direction eq 'OUT') {
1409         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -g PVEFW-SET-ACCEPT-MARK");
1410     } else {
1411         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
1412     }
1413
1414     if ($direction eq 'OUT') {
1415         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
1416             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
1417         }
1418         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1419     }
1420 }
1421
1422 sub ruleset_generate_vm_rules {
1423     my ($ruleset, $rules, $cluster_conf, $chain, $netid, $direction, $options) = @_;
1424
1425     my $lc_direction = lc($direction);
1426
1427     foreach my $rule (@$rules) {
1428         next if $rule->{iface} && $rule->{iface} ne $netid;
1429         next if !$rule->{enable};
1430         if ($rule->{type} eq 'group') {
1431             my $group_chain = "GROUP-$rule->{action}-$direction";
1432             if(!ruleset_chain_exist($ruleset, $group_chain)){
1433                 generate_group_rules($ruleset, $cluster_conf, $rule->{action});
1434             }
1435             ruleset_addrule($ruleset, $chain, "-j $group_chain");
1436             if ($direction eq 'OUT'){
1437                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j RETURN");
1438             }else{
1439                 my $accept = generate_nfqueue($options);
1440                 ruleset_addrule($ruleset, $chain, "-m mark --mark 1 -j $accept");
1441             }
1442
1443         } else {
1444             next if $rule->{type} ne $lc_direction;
1445             if ($direction eq 'OUT') {
1446                 ruleset_generate_rule($ruleset, $chain, $rule,
1447                                       { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1448             } else {
1449                 my $accept = generate_nfqueue($options);
1450                 ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept , REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1451             }
1452         }
1453     }
1454 }
1455
1456 sub generate_nfqueue {
1457     my ($options) = @_;
1458
1459     my $action = "";
1460     if($options->{ips}){
1461         $action = "NFQUEUE";
1462         if($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
1463             if(defined($3) && defined($1)) {
1464                 $action .= " --queue-balance $1:$3";
1465             }elsif (defined($1)) {
1466                 $action .= " --queue-num $1";
1467             }
1468         }
1469         $action .= " --queue-bypass";
1470     }else{
1471         $action = "ACCEPT";
1472     }
1473
1474     return $action;
1475 }
1476
1477 sub ruleset_generate_vm_ipsrules {
1478     my ($ruleset, $options, $direction, $iface, $bridge) = @_;
1479
1480     if ($options->{ips} && $direction eq 'IN') {
1481         my $nfqueue = generate_nfqueue($options);
1482
1483         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1484             ruleset_create_chain($ruleset, "PVEFW-IPS");
1485         }
1486
1487         if (!ruleset_chain_exist($ruleset, "$bridge-IPS")) {
1488             ruleset_create_chain($ruleset, "$bridge-IPS");
1489             ruleset_insertrule($ruleset, "PVEFW-IPS", "-o $bridge -m physdev --physdev-is-out -j $bridge-IPS");
1490         }
1491
1492         ruleset_addrule($ruleset, "$bridge-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
1493     }
1494 }
1495
1496 sub generate_venet_rules_direction {
1497     my ($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, $direction) = @_;
1498
1499     parse_address_list($ip); # make sure we have a valid $ip list
1500
1501     my $lc_direction = lc($direction);
1502
1503     my $rules = $vmfw_conf->{rules};
1504
1505     my $options = $vmfw_conf->{options};
1506     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1507
1508     my $chain = "venet0-$vmid-$direction";
1509
1510     ruleset_create_vm_chain($ruleset, $chain, $options, undef, $direction);
1511
1512     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $chain, 'venet', $direction);
1513
1514     # implement policy
1515     my $policy;
1516
1517     if ($direction eq 'OUT') {
1518         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1519     } else {
1520         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1521     }
1522
1523     my $accept = generate_nfqueue($options);
1524     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1525     ruleset_add_chain_policy($ruleset, $chain, $vmid, $policy, $loglevel, $accept_action);
1526
1527     # plug into FORWARD, INPUT and OUTPUT chain
1528     if ($direction eq 'OUT') {
1529         ruleset_generate_rule_insert($ruleset, "PVEFW-FORWARD", {
1530             action => $chain,
1531             source => $ip,
1532             iface_in => 'venet0'});
1533
1534         ruleset_generate_rule_insert($ruleset, "PVEFW-INPUT", {
1535             action => $chain,
1536             source => $ip,
1537             iface_in => 'venet0'});
1538     } else {
1539         ruleset_generate_rule($ruleset, "PVEFW-FORWARD", {
1540             action => $chain,
1541             dest => $ip,
1542             iface_out => 'venet0'});
1543
1544         ruleset_generate_rule($ruleset, "PVEFW-OUTPUT", {
1545             action => $chain,
1546             dest => $ip,
1547             iface_out => 'venet0'});
1548     }
1549 }
1550
1551 sub generate_tap_rules_direction {
1552     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $bridge, $direction) = @_;
1553
1554     my $lc_direction = lc($direction);
1555
1556     my $rules = $vmfw_conf->{rules};
1557
1558     my $options = $vmfw_conf->{options};
1559     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
1560
1561     my $tapchain = "$iface-$direction";
1562
1563     ruleset_create_vm_chain($ruleset, $tapchain, $options, $macaddr, $direction);
1564
1565     ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $tapchain, $netid, $direction, $options);
1566
1567     ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface, $bridge);
1568
1569     # implement policy
1570     my $policy;
1571
1572     if ($direction eq 'OUT') {
1573         $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1574     } else {
1575         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1576     }
1577
1578     my $accept = generate_nfqueue($options);
1579     my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
1580     ruleset_add_chain_policy($ruleset, $tapchain, $vmid, $policy, $loglevel, $accept_action);
1581
1582     # plug the tap chain to bridge chain
1583     if ($direction eq 'IN') {
1584         ruleset_insertrule($ruleset, "$bridge-IN",
1585                            "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
1586     } else {
1587         ruleset_insertrule($ruleset, "$bridge-OUT",
1588                            "-m physdev --physdev-in $iface -j $tapchain");
1589     }
1590 }
1591
1592 sub enable_host_firewall {
1593     my ($ruleset, $hostfw_conf, $cluster_conf) = @_;
1594
1595     # fixme: allow security groups
1596
1597     my $options = $hostfw_conf->{options};
1598     my $rules = $hostfw_conf->{rules};
1599
1600     # host inbound firewall
1601     my $chain = "PVEFW-HOST-IN";
1602     ruleset_create_chain($ruleset, $chain);
1603
1604     my $loglevel = get_option_log_level($options, "log_level_in");
1605
1606     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
1607         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
1608     }
1609
1610     if ($options->{tcpflags}) {
1611         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
1612     }
1613
1614     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1615     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1616     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
1617     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1618     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1619     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT");  #corosync
1620
1621     # we use RETURN because we need to check also tap rules
1622     my $accept_action = 'RETURN';
1623
1624     foreach my $rule (@$rules) {
1625         next if $rule->{type} ne 'in';
1626         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1627     }
1628
1629     # implement input policy
1630     my $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
1631     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1632
1633     # host outbound firewall
1634     $chain = "PVEFW-HOST-OUT";
1635     ruleset_create_chain($ruleset, $chain);
1636
1637     $loglevel = get_option_log_level($options, "log_level_out");
1638
1639     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
1640     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT");
1641     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
1642     ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST -j ACCEPT");
1643     ruleset_addrule($ruleset, $chain, "-p udp -m conntrack --ctstate NEW --dport 5404:5405 -j ACCEPT");
1644     ruleset_addrule($ruleset, $chain, "-p udp -m udp --dport 9000 -j ACCEPT"); #corosync
1645
1646     # we use RETURN because we may want to check other thigs later
1647     $accept_action = 'RETURN';
1648
1649     foreach my $rule (@$rules) {
1650         next if $rule->{type} ne 'out';
1651         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1652     }
1653
1654     # implement output policy
1655     $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
1656     ruleset_add_chain_policy($ruleset, $chain, 0, $policy, $loglevel, $accept_action);
1657
1658     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
1659     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
1660 }
1661
1662 sub generate_group_rules {
1663     my ($ruleset, $cluster_conf, $group) = @_;
1664     die "no such security group '$group'\n" if !$cluster_conf->{groups}->{$group};
1665
1666     my $rules = $cluster_conf->{groups}->{$group};
1667
1668     my $chain = "GROUP-${group}-IN";
1669
1670     ruleset_create_chain($ruleset, $chain);
1671     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1672
1673     foreach my $rule (@$rules) {
1674         next if $rule->{type} ne 'in';
1675         ruleset_generate_rule($ruleset, $chain, $rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1676     }
1677
1678     $chain = "GROUP-${group}-OUT";
1679
1680     ruleset_create_chain($ruleset, $chain);
1681     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark 0"); # clear mark
1682
1683     foreach my $rule (@$rules) {
1684         next if $rule->{type} ne 'out';
1685         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
1686         # check also other tap rules later
1687         ruleset_generate_rule($ruleset, $chain, $rule,
1688                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" }, undef, $cluster_conf);
1689     }
1690 }
1691
1692 my $MAX_NETS = 32;
1693 my $valid_netdev_names = {};
1694 for (my $i = 0; $i < $MAX_NETS; $i++)  {
1695     $valid_netdev_names->{"net$i"} = 1;
1696 }
1697
1698 sub parse_fw_rule {
1699     my ($line, $need_iface, $allow_groups) = @_;
1700
1701     my ($type, $action, $iface, $source, $dest, $proto, $dport, $sport);
1702
1703     # we can add single line comments to the end of the rule
1704     my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
1705
1706     # we can disable a rule when prefixed with '|'
1707     my $enable = 1;
1708
1709     $enable = 0 if $line =~ s/^\|//;
1710
1711     my @data = split(/\s+/, $line);
1712     my $expected_elements = $need_iface ? 8 : 7;
1713
1714     die "wrong number of rule elements\n" if scalar(@data) > $expected_elements;
1715
1716     if ($need_iface) {
1717         ($type, $action, $iface, $source, $dest, $proto, $dport, $sport) = @data
1718     } else {
1719         ($type, $action, $source, $dest, $proto, $dport, $sport) =  @data;
1720     }
1721
1722     die "incomplete rule\n" if ! ($type && $action);
1723
1724     my $macro;
1725
1726     $type = lc($type);
1727
1728     if ($type eq  'in' || $type eq 'out') {
1729         if ($action =~ m/^(ACCEPT|DROP|REJECT)$/) {
1730             # OK
1731         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
1732             $action = $2;
1733             my $preferred_name = $pve_fw_preferred_macro_names->{lc($1)};
1734             die "unknown macro '$1'\n" if !$preferred_name;
1735             $macro = $preferred_name;
1736         } else {
1737             die "unknown action '$action'\n";
1738         }
1739     } elsif ($type eq 'group') {
1740         die "wrong number of rule elements\n" if scalar(@data) != 3;
1741         die "groups disabled\n" if !$allow_groups;
1742
1743         die "invalid characters in group name\n" if $action !~ m/^[A-Za-z0-9_\-]+$/;
1744     } else {
1745         die "unknown rule type '$type'\n";
1746     }
1747
1748     if ($need_iface) {
1749         $iface = undef if $iface && $iface eq '-';
1750     }
1751
1752     $proto = undef if $proto && $proto eq '-';
1753     pve_fw_verify_protocol_spec($proto) if $proto;
1754
1755     $source = undef if $source && $source eq '-';
1756     $dest = undef if $dest && $dest eq '-';
1757
1758     $dport = undef if $dport && $dport eq '-';
1759     $sport = undef if $sport && $sport eq '-';
1760
1761     parse_port_name_number_or_range($dport) if defined($dport);
1762     parse_port_name_number_or_range($sport) if defined($sport);
1763
1764     parse_address_list($source) if $source;
1765     parse_address_list($dest) if $dest;
1766
1767     return {
1768         type => $type,
1769         enable => $enable,
1770         comment => $comment,
1771         action => $action,
1772         macro => $macro,
1773         iface => $iface,
1774         source => $source,
1775         dest => $dest,
1776         proto => $proto,
1777         dport => $dport,
1778         sport => $sport,
1779     };
1780 }
1781
1782 sub parse_vmfw_option {
1783     my ($line) = @_;
1784
1785     my ($opt, $value);
1786
1787     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1788
1789     if ($line =~ m/^(enable|dhcp|macfilter|nosmurfs|tcpflags|ips):\s*(0|1)\s*$/i) {
1790         $opt = lc($1);
1791         $value = int($2);
1792     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
1793         $opt = lc($1);
1794         $value = $2 ? lc($3) : '';
1795     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1796         $opt = lc($1);
1797         $value = uc($3);
1798     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
1799         $opt = lc($1);
1800         $value = $2;
1801     } else {
1802         chomp $line;
1803         die "can't parse option '$line'\n"
1804     }
1805
1806     return ($opt, $value);
1807 }
1808
1809 sub parse_hostfw_option {
1810     my ($line) = @_;
1811
1812     my ($opt, $value);
1813
1814     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
1815
1816     if ($line =~ m/^(enable|dhcp|nosmurfs|tcpflags|allow_bridge_route|optimize):\s*(0|1)\s*$/i) {
1817         $opt = lc($1);
1818         $value = int($2);
1819     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
1820         $opt = lc($1);
1821         $value = $2 ? lc($3) : '';
1822     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
1823         $opt = lc($1);
1824         $value = uc($3);
1825     } elsif ($line =~ m/^(nf_conntrack_max):\s*(\d+)\s*$/i) {
1826         $opt = lc($1);
1827         $value = int($2);
1828     } else {
1829         chomp $line;
1830         die "can't parse option '$line'\n"
1831     }
1832
1833     return ($opt, $value);
1834 }
1835
1836 sub parse_clusterfw_option {
1837     my ($line) = @_;
1838
1839     my ($opt, $value);
1840
1841     if ($line =~ m/^(enable):\s*(0|1)\s*$/i) {
1842         $opt = lc($1);
1843         $value = int($2);
1844     } else {
1845         chomp $line;
1846         die "can't parse option '$line'\n"
1847     }
1848
1849     return ($opt, $value);
1850 }
1851
1852 sub parse_vm_fw_rules {
1853     my ($filename, $fh) = @_;
1854
1855     my $res = { rules => [], options => {}};
1856
1857     my $section;
1858
1859     my $digest = Digest::SHA->new('sha1');
1860
1861     while (defined(my $line = <$fh>)) {
1862         $digest->add($line);
1863
1864         next if $line =~ m/^#/;
1865         next if $line =~ m/^\s*$/;
1866
1867         my $linenr = $fh->input_line_number();
1868         my $prefix = "$filename (line $linenr)";
1869
1870         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1871             $section = lc($1);
1872             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1873             next;
1874         }
1875         if (!$section) {
1876             warn "$prefix: skip line - no section";
1877             next;
1878         }
1879
1880         next if !$res->{$section}; # skip undefined section
1881
1882         if ($section eq 'options') {
1883             eval {
1884                 my ($opt, $value) = parse_vmfw_option($line);
1885                 $res->{options}->{$opt} = $value;
1886             };
1887             warn "$prefix: $@" if $@;
1888             next;
1889         }
1890
1891         my $rule;
1892         eval { $rule = parse_fw_rule($line, 1, 1); };
1893         if (my $err = $@) {
1894             warn "$prefix: $err";
1895             next;
1896         }
1897
1898         push @{$res->{$section}}, $rule;
1899     }
1900
1901     $res->{digest} = $digest->b64digest;
1902
1903     return $res;
1904 }
1905
1906 sub parse_host_fw_rules {
1907     my ($filename, $fh) = @_;
1908
1909     my $res = { rules => [], options => {}};
1910
1911     my $section;
1912
1913     my $digest = Digest::SHA->new('sha1');
1914
1915     while (defined(my $line = <$fh>)) {
1916         $digest->add($line);
1917
1918         next if $line =~ m/^#/;
1919         next if $line =~ m/^\s*$/;
1920
1921         my $linenr = $fh->input_line_number();
1922         my $prefix = "$filename (line $linenr)";
1923
1924         if ($line =~ m/^\[(\S+)\]\s*$/i) {
1925             $section = lc($1);
1926             warn "$prefix: ignore unknown section '$section'\n" if !$res->{$section};
1927             next;
1928         }
1929         if (!$section) {
1930             warn "$prefix: skip line - no section";
1931             next;
1932         }
1933
1934         next if !$res->{$section}; # skip undefined section
1935
1936         if ($section eq 'options') {
1937             eval {
1938                 my ($opt, $value) = parse_hostfw_option($line);
1939                 $res->{options}->{$opt} = $value;
1940             };
1941             warn "$prefix: $@" if $@;
1942             next;
1943         }
1944
1945         my $rule;
1946         eval { $rule = parse_fw_rule($line, 1, 1); };
1947         if (my $err = $@) {
1948             warn "$prefix: $err";
1949             next;
1950         }
1951
1952         push @{$res->{$section}}, $rule;
1953     }
1954
1955 $res->{digest} = $digest->b64digest;
1956
1957     return $res;
1958 }
1959
1960 sub parse_cluster_fw_rules {
1961     my ($filename, $fh) = @_;
1962
1963     my $section;
1964     my $group;
1965
1966     my $res = { rules => [], options => {}, groups => {}, ipset => {} };
1967
1968     my $digest = Digest::SHA->new('sha1');
1969
1970     while (defined(my $line = <$fh>)) {
1971         $digest->add($line);
1972
1973         next if $line =~ m/^#/;
1974         next if $line =~ m/^\s*$/;
1975
1976         my $linenr = $fh->input_line_number();
1977         my $prefix = "$filename (line $linenr)";
1978
1979         if ($line =~ m/^\[options\]$/i) {
1980             $section = 'options';
1981             next;
1982         }
1983
1984         if ($line =~ m/^\[group\s+(\S+)\]\s*$/i) {
1985             $section = 'groups';
1986             $group = lc($1);
1987             $res->{$section}->{$group} = [];
1988             next;
1989         }
1990
1991         if ($line =~ m/^\[rules\]$/i) {
1992             $section = 'rules';
1993             next;
1994         }
1995
1996         if ($line =~ m/^\[ipset\s+(\S+)\]\s*$/i) {
1997             $section = 'ipset';
1998             $group = lc($1);
1999             $res->{$section}->{$group} = [];
2000             next;
2001         }
2002
2003         if (!$section) {
2004             warn "$prefix: skip line - no section\n";
2005             next;
2006         }
2007
2008         if ($section eq 'options') {
2009             eval {
2010                 my ($opt, $value) = parse_clusterfw_option($line);
2011                 $res->{options}->{$opt} = $value;
2012             };
2013             warn "$prefix: $@" if $@;
2014         } elsif ($section eq 'rules') {
2015             my $rule;
2016             eval { $rule = parse_fw_rule($line, 1, 1); };
2017             if (my $err = $@) {
2018                 warn "$prefix: $err";
2019                 next;
2020             }
2021             push @{$res->{$section}}, $rule;
2022         } elsif ($section eq 'groups') {
2023             my $rule;
2024             eval { $rule = parse_fw_rule($line, 0, 0); };
2025             if (my $err = $@) {
2026                 warn "$prefix: $err";
2027                 next;
2028             }
2029             push @{$res->{$section}->{$group}}, $rule;
2030         } elsif ($section eq 'ipset') {
2031             # we can add single line comments to the end of the rule
2032             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2033
2034             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2035             my $nomatch = $1;
2036             my $cidr = $2;
2037
2038             $cidr =~ s|/32$||;
2039
2040             eval { pve_verify_ipv4_or_cidr($cidr); };
2041             if (my $err = $@) {
2042                 warn "$prefix: $cidr - $err";
2043                 next;
2044             }
2045
2046             my $entry = { cidr => $cidr };
2047             $entry->{nomatch} = 1 if $nomatch;
2048             $entry->{comment} = $comment if $comment;
2049
2050             push @{$res->{$section}->{$group}}, $entry;
2051         }
2052     }
2053
2054     $res->{digest} = $digest->b64digest;
2055     return $res;
2056 }
2057
2058 sub run_locked {
2059     my ($code, @param) = @_;
2060
2061     my $timeout = 10;
2062
2063     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2064
2065     die $@ if $@;
2066
2067     return $res;
2068 }
2069
2070 sub read_local_vm_config {
2071
2072     my $openvz = {};
2073     my $qemu = {};
2074
2075     my $vmdata = { openvz => $openvz, qemu => $qemu };
2076
2077     my $vmlist = PVE::Cluster::get_vmlist();
2078     return $vmdata if !$vmlist || !$vmlist->{ids};
2079     my $ids = $vmlist->{ids};
2080
2081     foreach my $vmid (keys %$ids) {
2082         next if !$vmid; # skip VE0
2083         my $d = $ids->{$vmid};
2084         next if !$d->{node} || $d->{node} ne $nodename;
2085         next if !$d->{type};
2086         if ($d->{type} eq 'openvz') {
2087             if ($have_pve_manager) {
2088                 my $cfspath = PVE::OpenVZ::cfs_config_path($vmid);
2089                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2090                     $openvz->{$vmid} = $conf;
2091                 }
2092             }
2093         } elsif ($d->{type} eq 'qemu') {
2094             if ($have_qemu_server) {
2095                 my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
2096                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2097                     $qemu->{$vmid} = $conf;
2098                 }
2099             }
2100         }
2101     }
2102
2103     return $vmdata;
2104 };
2105
2106 sub load_vmfw_conf {
2107     my ($vmid) = @_;
2108
2109     my $vmfw_conf = {};
2110
2111     my $filename = "/etc/pve/firewall/$vmid.fw";
2112     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2113         $vmfw_conf = parse_vm_fw_rules($filename, $fh);
2114     }
2115
2116     return $vmfw_conf;
2117 }
2118
2119 my $format_rules = sub {
2120     my ($rules, $need_iface) = @_;
2121
2122     my $raw = '';
2123
2124     foreach my $rule (@$rules) {
2125         if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2126             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2127             $raw .= uc($rule->{type});
2128             if ($rule->{macro}) {
2129                 $raw .= " $rule->{macro}($rule->{action})";
2130             } else {
2131                 $raw .= " " . $rule->{action};
2132             }
2133             $raw .= " " . ($rule->{iface} || '-') if $need_iface;
2134             $raw .= " " . ($rule->{source} || '-');
2135             $raw .= " " . ($rule->{dest} || '-');
2136             $raw .= " " . ($rule->{proto} || '-');
2137             $raw .= " " . ($rule->{dport} || '-');
2138             $raw .= " " . ($rule->{sport} || '-');
2139             $raw .= " # " . encode('utf8', $rule->{comment})
2140                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2141             $raw .= "\n";
2142         } else {
2143             die "implement me '$rule->{type}'";
2144         }
2145     }
2146
2147     return $raw;
2148 };
2149
2150 my $format_options = sub {
2151     my ($options) = @_;
2152
2153     my $raw = '';
2154
2155     $raw .= "[OPTIONS]\n\n";
2156     foreach my $opt (keys %$options) {
2157         $raw .= "$opt: $options->{$opt}\n";
2158     }
2159     $raw .= "\n";
2160
2161     return $raw;
2162 };
2163
2164 my $format_ipset = sub {
2165     my ($options) = @_;
2166
2167     my $raw = '';
2168
2169     my $nethash = {};
2170     foreach my $entry (@$options) {
2171         $nethash->{$entry->{cidr}} = $entry;
2172     }
2173
2174     foreach my $cidr (sort keys %$nethash) {
2175         my $entry = $nethash->{$cidr};
2176         my $line = $entry->{nomatch} ? '!' : '';
2177         $line .= $entry->{cidr};
2178         $line .= " # " . encode('utf8', $entry->{comment})
2179             if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2180         $raw .= "$line\n";
2181     }
2182
2183     return $raw;
2184 };
2185
2186 sub save_vmfw_conf {
2187     my ($vmid, $vmfw_conf) = @_;
2188
2189     my $raw = '';
2190
2191     my $options = $vmfw_conf->{options};
2192     $raw .= &$format_options($options) if scalar(keys %$options);
2193
2194     my $rules = $vmfw_conf->{rules};
2195     if (scalar(@$rules)) {
2196         $raw .= "[RULES]\n\n";
2197         $raw .= &$format_rules($rules, 1);
2198         $raw .= "\n";
2199     }
2200
2201     my $filename = "/etc/pve/firewall/$vmid.fw";
2202     PVE::Tools::file_set_contents($filename, $raw);
2203 }
2204
2205 sub read_vm_firewall_configs {
2206     my ($vmdata) = @_;
2207     my $vmfw_configs = {};
2208
2209     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
2210         my $vmfw_conf = load_vmfw_conf($vmid);
2211         next if !$vmfw_conf->{options}; # skip if file does not exists
2212         $vmfw_configs->{$vmid} = $vmfw_conf;
2213     }
2214
2215     return $vmfw_configs;
2216 }
2217
2218 sub get_option_log_level {
2219     my ($options, $k) = @_;
2220
2221     my $v = $options->{$k};
2222     $v = $default_log_level if !defined($v);
2223
2224     return undef if $v eq '' || $v eq 'nolog';
2225
2226     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
2227
2228     return $v if ($v >= 0) && ($v <= 7);
2229
2230     warn "unknown log level ($k = '$v')\n";
2231
2232     return undef;
2233 }
2234
2235 sub generate_std_chains {
2236     my ($ruleset, $options) = @_;
2237
2238     my $loglevel = get_option_log_level($options, 'smurf_log_level');
2239
2240     # same as shorewall smurflog.
2241     my $chain = 'PVEFW-smurflog';
2242
2243     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2244     push @{$pve_std_chains->{$chain}}, "-j DROP";
2245
2246     # same as shorewall logflags action.
2247     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
2248     $chain = 'PVEFW-logflags';
2249     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
2250     push @{$pve_std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
2251     push @{$pve_std_chains->{$chain}}, "-j DROP";
2252
2253     foreach my $chain (keys %$pve_std_chains) {
2254         ruleset_create_chain($ruleset, $chain);
2255         foreach my $rule (@{$pve_std_chains->{$chain}}) {
2256             if (ref($rule)) {
2257                 ruleset_generate_rule($ruleset, $chain, $rule);
2258             } else {
2259                 ruleset_addrule($ruleset, $chain, $rule);
2260             }
2261         }
2262     }
2263 }
2264
2265 sub generate_ipset_chains {
2266     my ($ipset_ruleset, $fw_conf) = @_;
2267
2268     foreach my $ipset (keys %{$fw_conf->{ipset}}) {
2269         generate_ipset($ipset_ruleset, "PVEFW-$ipset", $fw_conf->{ipset}->{$ipset});
2270     }
2271 }
2272
2273 sub generate_ipset {
2274     my ($ipset_ruleset, $name, $options) = @_;
2275
2276     my $hashsize = scalar(@$options);
2277     if ($hashsize <= 64) {
2278         $hashsize = 64;
2279     } else {
2280         $hashsize = round_powerof2($hashsize);
2281     }
2282
2283     push @{$ipset_ruleset->{$name}}, "create $name hash:net family inet hashsize $hashsize maxelem $hashsize";
2284
2285     # remove duplicates
2286     my $nethash = {};
2287     foreach my $entry (@$options) {
2288         $nethash->{$entry->{cidr}} = $entry;
2289     }
2290
2291     foreach my $cidr (sort keys %$nethash) {
2292         my $entry = $nethash->{$cidr};
2293
2294         my $cmd = "add $name $cidr";
2295         if ($entry->{nomatch}) {
2296             if ($feature_ipset_nomatch) {
2297                 push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
2298             } else {
2299                 warn "ignore !$cidr - nomatch not supported by kernel\n";
2300             }
2301         } else {
2302             push @{$ipset_ruleset->{$name}}, $cmd;
2303         }
2304     }
2305 }
2306
2307 sub round_powerof2 {
2308     my ($int) = @_;
2309
2310     $int--;
2311     $int |= $int >> $_ foreach (1,2,4,8,16);
2312     return ++$int;
2313 }
2314
2315 sub save_pvefw_status {
2316     my ($status) = @_;
2317
2318     die "unknown status '$status' - internal error"
2319         if $status !~ m/^(stopped|active)$/;
2320
2321     mkdir dirname($pve_fw_status_filename);
2322     PVE::Tools::file_set_contents($pve_fw_status_filename, $status);
2323 }
2324
2325 sub read_pvefw_status {
2326
2327     my $status = 'unknown';
2328
2329     return 'stopped' if ! -f $pve_fw_status_filename;
2330
2331     eval {
2332         $status = PVE::Tools::file_get_contents($pve_fw_status_filename);
2333     };
2334     warn $@ if $@;
2335
2336     return $status;
2337 }
2338
2339 # fixme: move to pve-common PVE::ProcFSTools
2340 sub read_proc_net_route {
2341     my $filename = "/proc/net/route";
2342
2343     my $res = {};
2344
2345     my $fh = IO::File->new ($filename, "r");
2346     return $res if !$fh;
2347
2348     my $int_to_quad = sub {
2349         return join '.' => map { ($_[0] >> 8*(3-$_)) % 256 } (3, 2, 1, 0);
2350     };
2351
2352     while (defined(my $line = <$fh>)) {
2353         next if $line =~/^Iface\s+Destination/; # skip head
2354         my ($iface, $dest, $gateway, $metric, $mask, $mtu) = (split(/\s+/, $line))[0,1,2,6,7,8];
2355         push @{$res->{$iface}}, {
2356             dest => &$int_to_quad(hex($dest)),
2357             gateway => &$int_to_quad(hex($gateway)),
2358             mask => &$int_to_quad(hex($mask)),
2359             metric => $metric,
2360             mtu => $mtu,
2361         };
2362     }
2363
2364     return $res;
2365 }
2366
2367 sub load_clusterfw_conf {
2368
2369     my $cluster_conf = {};
2370      if (my $fh = IO::File->new($clusterfw_conf_filename, O_RDONLY)) {
2371         $cluster_conf = parse_cluster_fw_rules($clusterfw_conf_filename, $fh);
2372     }
2373
2374     return $cluster_conf;
2375 }
2376
2377 sub save_clusterfw_conf {
2378     my ($cluster_conf) = @_;
2379
2380     my $raw = '';
2381
2382     my $options = $cluster_conf->{options};
2383     $raw .= &$format_options($options) if scalar(keys %$options);
2384
2385     foreach my $ipset (sort keys %{$cluster_conf->{ipset}}) {
2386         $raw .= "[IPSET $ipset]\n\n";
2387         my $options = $cluster_conf->{ipset}->{$ipset};
2388         $raw .= &$format_ipset($options);
2389         $raw .= "\n";
2390     }
2391
2392     my $rules = $cluster_conf->{rules};
2393     if (scalar(@$rules)) {
2394         $raw .= "[RULES]\n\n";
2395         $raw .= &$format_rules($rules, 1);
2396         $raw .= "\n";
2397     }
2398
2399     foreach my $group (sort keys %{$cluster_conf->{groups}}) {
2400         my $rules = $cluster_conf->{groups}->{$group};
2401         $raw .= "[group $group]\n\n";
2402         $raw .= &$format_rules($rules, 0);
2403         $raw .= "\n";
2404     }
2405
2406     PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
2407 }
2408
2409 sub load_hostfw_conf {
2410
2411     my $hostfw_conf = {};
2412     if (my $fh = IO::File->new($hostfw_conf_filename, O_RDONLY)) {
2413         $hostfw_conf = parse_host_fw_rules($hostfw_conf_filename, $fh);
2414     }
2415     return $hostfw_conf;
2416 }
2417
2418 sub save_hostfw_conf {
2419     my ($hostfw_conf) = @_;
2420
2421     my $raw = '';
2422
2423     my $options = $hostfw_conf->{options};
2424     $raw .= &$format_options($options) if scalar(keys %$options);
2425
2426     my $rules = $hostfw_conf->{rules};
2427     if (scalar(@$rules)) {
2428         $raw .= "[RULES]\n\n";
2429         $raw .= &$format_rules($rules, 1);
2430         $raw .= "\n";
2431     }
2432
2433     PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
2434 }
2435
2436 sub compile {
2437     my $vmdata = read_local_vm_config();
2438     my $vmfw_configs = read_vm_firewall_configs($vmdata);
2439
2440     my $routing_table = read_proc_net_route();
2441
2442     my $cluster_conf = load_clusterfw_conf();
2443
2444     my $ipset_ruleset = {};
2445     generate_ipset_chains($ipset_ruleset, $cluster_conf);
2446
2447     my $ruleset = {};
2448
2449     ruleset_create_chain($ruleset, "PVEFW-INPUT");
2450     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
2451
2452     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
2453
2454     my $hostfw_conf = load_hostfw_conf();
2455     my $hostfw_options = $hostfw_conf->{options} || {};
2456
2457     generate_std_chains($ruleset, $hostfw_options);
2458
2459     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
2460
2461     enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf) if $hostfw_enable;
2462
2463     # generate firewall rules for QEMU VMs
2464     foreach my $vmid (keys %{$vmdata->{qemu}}) {
2465         my $conf = $vmdata->{qemu}->{$vmid};
2466         my $vmfw_conf = $vmfw_configs->{$vmid};
2467         next if !$vmfw_conf;
2468         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2469
2470         foreach my $netid (keys %$conf) {
2471             next if $netid !~ m/^net(\d+)$/;
2472             my $net = PVE::QemuServer::parse_net($conf->{$netid});
2473             next if !$net;
2474             my $iface = "tap${vmid}i$1";
2475
2476             my $bridge = $net->{bridge};
2477             next if !$bridge; # fixme: ?
2478
2479             $bridge .= "v$net->{tag}" if $net->{tag};
2480
2481             generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2482
2483             my $macaddr = $net->{macaddr};
2484             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2485                                          $vmfw_conf, $vmid, $bridge, 'IN');
2486             generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2487                                          $vmfw_conf, $vmid, $bridge, 'OUT');
2488         }
2489     }
2490
2491     # generate firewall rules for OpenVZ containers
2492     foreach my $vmid (keys %{$vmdata->{openvz}}) {
2493         my $conf = $vmdata->{openvz}->{$vmid};
2494
2495         my $vmfw_conf = $vmfw_configs->{$vmid};
2496         next if !$vmfw_conf;
2497         next if defined($vmfw_conf->{options}->{enable}) && ($vmfw_conf->{options}->{enable} == 0);
2498
2499         if ($conf->{ip_address} && $conf->{ip_address}->{value}) {
2500             my $ip = $conf->{ip_address}->{value};
2501             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'IN');
2502             generate_venet_rules_direction($ruleset, $cluster_conf, $vmfw_conf, $vmid, $ip, 'OUT');
2503         }
2504
2505         if ($conf->{netif} && $conf->{netif}->{value}) {
2506             my $netif = PVE::OpenVZ::parse_netif($conf->{netif}->{value});
2507             foreach my $netid (keys %$netif) {
2508                 my $d = $netif->{$netid};
2509                 my $bridge = $d->{bridge};
2510                 if (!$bridge) {
2511                     warn "no bridge device for CT $vmid iface '$netid'\n";
2512                     next; # fixme?
2513                 }
2514
2515                 generate_bridge_chains($ruleset, $hostfw_conf, $bridge, $routing_table);
2516
2517                 my $macaddr = $d->{mac};
2518                 my $iface = $d->{host_ifname};
2519                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2520                                              $vmfw_conf, $vmid, $bridge, 'IN');
2521                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
2522                                              $vmfw_conf, $vmid, $bridge, 'OUT');
2523             }
2524         }
2525     }
2526
2527     if($hostfw_options->{optimize}){
2528
2529         my $accept = ruleset_chain_exist($ruleset, "PVEFW-IPS") ? "PVEFW-IPS" : "ACCEPT";
2530         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2531         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate INVALID -j DROP");
2532     }
2533
2534     # fixme: what log level should we use here?
2535     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
2536
2537     # fixme: should we really block inter-bridge traffic?
2538
2539     # always allow traffic from containers?
2540     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i venet0 -j RETURN");
2541
2542     # disable interbridge routing
2543     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j PVEFW-Drop");
2544     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j PVEFW-Drop");
2545     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-o vmbr+");
2546     ruleset_addlog($ruleset, "PVEFW-FORWARD", 0, "DROP: ", $loglevel, "-i vmbr+");
2547     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-o vmbr+ -j DROP");
2548     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-i vmbr+ -j DROP");
2549
2550     return wantarray ? ($ruleset, $hostfw_conf, $ipset_ruleset) : $ruleset;
2551 }
2552
2553 sub get_ruleset_status {
2554     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
2555
2556     my $statushash = {};
2557
2558     foreach my $chain (sort keys %$ruleset) {
2559         my $sig = &$digest_fn($ruleset->{$chain});
2560
2561         $statushash->{$chain}->{sig} = $sig;
2562
2563         my $oldsig = $active_chains->{$chain};
2564         if (!defined($oldsig)) {
2565             $statushash->{$chain}->{action} = 'create';
2566         } else {
2567             if ($oldsig eq $sig) {
2568                 $statushash->{$chain}->{action} = 'exists';
2569             } else {
2570                 $statushash->{$chain}->{action} = 'update';
2571             }
2572         }
2573         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
2574         foreach my $cmd (@{$ruleset->{$chain}}) {
2575             print "\t$cmd\n" if $verbose;
2576         }
2577     }
2578
2579     foreach my $chain (sort keys %$active_chains) {
2580         if (!defined($ruleset->{$chain})) {
2581             my $sig = $active_chains->{$chain};
2582             $statushash->{$chain}->{action} = 'delete';
2583             $statushash->{$chain}->{sig} = $sig;
2584             print "delete $chain ($sig)\n" if $verbose;
2585         }
2586     }
2587
2588     return $statushash;
2589 }
2590
2591 sub print_sig_rule {
2592     my ($chain, $sig) = @_;
2593
2594     # We just use this to store a SHA1 checksum used to detect changes
2595     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
2596 }
2597
2598 sub get_ruleset_cmdlist {
2599     my ($ruleset, $verbose) = @_;
2600
2601     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
2602
2603     my ($active_chains, $hooks) = iptables_get_chains();
2604     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
2605
2606     # create missing chains first
2607     foreach my $chain (sort keys %$ruleset) {
2608         my $stat = $statushash->{$chain};
2609         die "internal error" if !$stat;
2610         next if $stat->{action} ne 'create';
2611
2612         $cmdlist .= ":$chain - [0:0]\n";
2613     }
2614
2615     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2616         if (!$hooks->{$h}) {
2617             $cmdlist .= "-A $h -j PVEFW-$h\n";
2618         }
2619     }
2620
2621     foreach my $chain (sort keys %$ruleset) {
2622         my $stat = $statushash->{$chain};
2623         die "internal error" if !$stat;
2624
2625         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
2626             $cmdlist .= "-F $chain\n";
2627             foreach my $cmd (@{$ruleset->{$chain}}) {
2628                 $cmdlist .= "$cmd\n";
2629             }
2630             $cmdlist .= print_sig_rule($chain, $stat->{sig});
2631         } elsif ($stat->{action} eq 'delete') {
2632             die "internal error"; # this should not happen
2633         } elsif ($stat->{action} eq 'exists') {
2634             # do nothing
2635         } else {
2636             die "internal error - unknown status '$stat->{action}'";
2637         }
2638     }
2639
2640     foreach my $chain (keys %$statushash) {
2641         next if $statushash->{$chain}->{action} ne 'delete';
2642         $cmdlist .= "-F $chain\n";
2643     }
2644     foreach my $chain (keys %$statushash) {
2645         next if $statushash->{$chain}->{action} ne 'delete';
2646         next if $chain eq 'PVEFW-INPUT';
2647         next if $chain eq 'PVEFW-OUTPUT';
2648         next if $chain eq 'PVEFW-FORWARD';
2649         $cmdlist .= "-X $chain\n";
2650     }
2651
2652     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
2653
2654     $cmdlist .= "COMMIT\n";
2655
2656     return wantarray ? ($cmdlist, $changes) : $cmdlist;
2657 }
2658
2659 sub get_ipset_cmdlist {
2660     my ($ruleset, $verbose) = @_;
2661
2662     my $cmdlist = "";
2663
2664     my $delete_cmdlist = "";
2665
2666     my $active_chains = ipset_get_chains();
2667     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
2668
2669     # remove stale _swap chains
2670     foreach my $chain (keys %$active_chains) {
2671         if ($chain =~ m/^PVEFW-\S+_swap$/) {
2672             $cmdlist .= "destroy $chain\n";
2673         }
2674     }
2675
2676     foreach my $chain (sort keys %$ruleset) {
2677         my $stat = $statushash->{$chain};
2678         die "internal error" if !$stat;
2679
2680         if ($stat->{action} eq 'create') {
2681             foreach my $cmd (@{$ruleset->{$chain}}) {
2682                 $cmdlist .= "$cmd\n";
2683             }
2684         }
2685
2686         if ($stat->{action} eq 'update') {
2687             my $chain_swap = $chain."_swap";
2688
2689             foreach my $cmd (@{$ruleset->{$chain}}) {
2690                 $cmd =~ s/$chain/$chain_swap/;
2691                 $cmdlist .= "$cmd\n";
2692             }
2693             $cmdlist .= "swap $chain_swap $chain\n";
2694             $cmdlist .= "flush $chain_swap\n";
2695             $cmdlist .= "destroy $chain_swap\n";
2696         }
2697
2698     }
2699
2700     foreach my $chain (keys %$statushash) {
2701         next if $statushash->{$chain}->{action} ne 'delete';
2702
2703         $delete_cmdlist .= "flush $chain\n";
2704         $delete_cmdlist .= "destroy $chain\n";
2705     }
2706
2707     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
2708
2709     return ($cmdlist, $delete_cmdlist, $changes);
2710 }
2711
2712 sub apply_ruleset {
2713     my ($ruleset, $hostfw_conf, $ipset_ruleset, $verbose) = @_;
2714
2715     enable_bridge_firewall();
2716
2717     update_nf_conntrack_max($hostfw_conf);
2718
2719     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
2720         get_ipset_cmdlist($ipset_ruleset, undef, $verbose);
2721
2722     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
2723
2724     if ($verbose) {
2725         if ($ipset_changes) {
2726             print "ipset changes:\n";
2727             print $ipset_create_cmdlist if $ipset_create_cmdlist;
2728             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
2729         }
2730
2731         if ($changes) {
2732             print "iptables changes:\n";
2733             print $cmdlist;
2734         }
2735     }
2736
2737     ipset_restore_cmdlist($ipset_create_cmdlist);
2738
2739     iptables_restore_cmdlist($cmdlist);
2740
2741     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
2742
2743     # test: re-read status and check if everything is up to date
2744     my $active_chains = iptables_get_chains();
2745     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
2746
2747     my $errors;
2748     foreach my $chain (sort keys %$ruleset) {
2749         my $stat = $statushash->{$chain};
2750         if ($stat->{action} ne 'exists') {
2751             warn "unable to update chain '$chain'\n";
2752             $errors = 1;
2753         }
2754     }
2755
2756     die "unable to apply firewall changes\n" if $errors;
2757 }
2758
2759 sub update_nf_conntrack_max {
2760     my ($hostfw_conf) = @_;
2761
2762     my $max = 65536; # reasonable default
2763
2764     my $options = $hostfw_conf->{options} || {};
2765
2766     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
2767         $max = $options->{nf_conntrack_max};
2768         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
2769     }
2770
2771     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
2772     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
2773
2774     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
2775
2776     if ($current != $max) {
2777         my $hashsize = int($max/4);
2778         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
2779         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
2780     }
2781 }
2782
2783 sub remove_pvefw_chains {
2784
2785     my ($chash, $hooks) = iptables_get_chains();
2786     my $cmdlist = "*filter\n";
2787
2788     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
2789         if ($hooks->{$h}) {
2790             $cmdlist .= "-D $h -j PVEFW-$h\n";
2791         }
2792     }
2793
2794     foreach my $chain (keys %$chash) {
2795         $cmdlist .= "-F $chain\n";
2796     }
2797
2798     foreach my $chain (keys %$chash) {
2799         $cmdlist .= "-X $chain\n";
2800     }
2801     $cmdlist .= "COMMIT\n";
2802
2803     iptables_restore_cmdlist($cmdlist);
2804 }
2805
2806 sub update {
2807     my ($start, $verbose) = @_;
2808
2809     my $code = sub {
2810         my $status = read_pvefw_status();
2811
2812         my ($ruleset, $hostfw_conf, $ipset_ruleset) = compile();
2813
2814         if ($start || $status eq 'active') {
2815
2816             save_pvefw_status('active') if ($status ne 'active');
2817
2818             apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $verbose);
2819         } else {
2820             print "Firewall not active (status = $status)\n" if $verbose;
2821         }
2822     };
2823
2824     run_locked($code);
2825 }
2826
2827
2828 1;