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 Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use PVE::Network;
  16 use PVE::SafeSyslog;
  17 use File::Basename;
  18 use File::Path;
  19 use IO::File;
  20 use Net::IP;
  21 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  22 use Encode;
  23
  24 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  25 my $pvefw_conf_dir = "/etc/pve/firewall";
  26 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  27
  28 # dynamically include PVE::QemuServer and PVE::LXC
  29 # to avoid dependency problems
  30 my $have_qemu_server;
  31 eval {
  32     require PVE::QemuServer;
  33     require PVE::QemuConfig;
  34     $have_qemu_server = 1;
  35 };
  36
  37 my $have_lxc;
  38 eval {
  39     require PVE::LXC;
  40     $have_lxc = 1;
  41 };
  42
  43
  44 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  45
  46 mkdir $pve_fw_status_dir; # make sure this exists
  47
  48 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  49 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  50 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  51
  52 my $max_alias_name_length = 64;
  53 my $max_ipset_name_length = 64;
  54 my $max_group_name_length = 18;
  55
  56 my $PROTOCOLS_WITH_PORTS = {
  57     udp => 1,     17 => 1,
  58     udplite => 1, 136 => 1,
  59     tcp => 1,     6 => 1,
  60     dccp => 1,    33 => 1,
  61     sctp => 1,    132 => 1,
  62 };
  63
  64 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  65 sub pve_verify_ip_or_cidr {
  66     my ($cidr, $noerr) = @_;
  67
  68     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(/(\d+))?$!) {
  69         return $cidr if Net::IP->new($cidr);
  70         return undef if $noerr;
  71         die Net::IP::Error() . "\n";
  72     }
  73     return undef if $noerr;
  74     die "value does not look like a valid IP address or CIDR network\n";
  75 }
  76
  77 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  78 sub pve_verify_ip_or_cidr_or_alias {
  79     my ($cidr, $noerr) = @_;
  80
  81     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  82
  83     return pve_verify_ip_or_cidr($cidr, $noerr);
  84 }
  85
  86 PVE::JSONSchema::register_standard_option('ipset-name', {
  87     description => "IP set name.",
  88     type => 'string',
  89     pattern => $ipset_name_pattern,
  90     minLength => 2,
  91     maxLength => $max_ipset_name_length,
  92 });
  93
  94 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
  95     description => "Alias name.",
  96     type => 'string',
  97     pattern => $ip_alias_pattern,
  98     minLength => 2,
  99     maxLength => $max_alias_name_length,
 100 });
 101
 102 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 103     description => "Log level.",
 104     type => 'string',
 105     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 106     optional => 1,
 107 });
 108
 109 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 110     description => "Security Group name.",
 111     type => 'string',
 112     pattern => $security_group_name_pattern,
 113     minLength => 2,
 114     maxLength => $max_group_name_length,
 115 });
 116
 117 my $feature_ipset_nomatch = 0;
 118 eval  {
 119     my (undef, undef, $release) = POSIX::uname();
 120     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 121         my ($major, $minor) = ($1, $2);
 122         $feature_ipset_nomatch = 1 if ($major > 3) ||
 123             ($major == 3 && $minor >= 7);
 124     }
 125
 126 };
 127
 128 my $nodename = PVE::INotify::nodename();
 129
 130 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 131
 132 my $default_log_level = 'nolog'; # avoid logs by default
 133
 134 my $log_level_hash = {
 135     debug => 7,
 136     info => 6,
 137     notice => 5,
 138     warning => 4,
 139     err => 3,
 140     crit => 2,
 141     alert => 1,
 142     emerg => 0,
 143 };
 144
 145 # %rule
 146 #
 147 # name => optional
 148 # action =>
 149 # proto =>
 150 # sport =>
 151 # dport =>
 152 # log => optional, loglevel
 153 # logmsg => optional, logmsg - overwrites default
 154 # iface_in
 155 # iface_out
 156 # match => optional, overwrites generation of match
 157 # target => optional, overwrites action
 158
 159 # we need to overwrite some macros for ipv6
 160 my $pve_ipv6fw_macros = {
 161     'Ping' => [
 162         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 163     ],
 164     'NeighborDiscovery' => [
 165         "IPv6 neighbor solicitation, neighbor and router advertisement",
 166         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 167         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 168         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 169         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 170     ],
 171     'DHCPv6' => [
 172         "DHCPv6 traffic",
 173         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 174     ],
 175     'Trcrt' => [
 176         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 177         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 178     ],
 179  };
 180
 181 # imported/converted from: /usr/share/shorewall/macro.*
 182 my $pve_fw_macros = {
 183     'Amanda' => [
 184         "Amanda Backup",
 185         { action => 'PARAM', proto => 'udp', dport => '10080' },
 186         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 187     ],
 188     'Auth' => [
 189         "Auth (identd) traffic",
 190         { action => 'PARAM', proto => 'tcp', dport => '113' },
 191     ],
 192     'BGP' => [
 193         "Border Gateway Protocol traffic",
 194         { action => 'PARAM', proto => 'tcp', dport => '179' },
 195     ],
 196     'BitTorrent' => [
 197         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 198         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 199         { action => 'PARAM', proto => 'udp', dport => '6881' },
 200     ],
 201     'BitTorrent32' => [
 202         "BitTorrent traffic for BitTorrent 3.2 and later",
 203         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 204         { action => 'PARAM', proto => 'udp', dport => '6881' },
 205     ],
 206     'Ceph' => [
 207         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 208         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 209         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 210     ],
 211     'CVS' => [
 212         "Concurrent Versions System pserver traffic",
 213         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 214     ],
 215     'Citrix' => [
 216         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 217         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 218         { action => 'PARAM', proto => 'udp', dport => '1604' },
 219         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 220     ],
 221     'DAAP' => [
 222         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 223         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 224         { action => 'PARAM', proto => 'udp', dport => '3689' },
 225     ],
 226     'DCC' => [
 227         "Distributed Checksum Clearinghouse spam filtering mechanism",
 228         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 229     ],
 230     'DHCPfwd' => [
 231         "Forwarded DHCP traffic",
 232         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 233     ],
 234     'DNS' => [
 235         "Domain Name System traffic (upd and tcp)",
 236         { action => 'PARAM', proto => 'udp', dport => '53' },
 237         { action => 'PARAM', proto => 'tcp', dport => '53' },
 238     ],
 239     'Distcc' => [
 240         "Distributed Compiler service",
 241         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 242     ],
 243     'FTP' => [
 244         "File Transfer Protocol",
 245         { action => 'PARAM', proto => 'tcp', dport => '21' },
 246     ],
 247     'Finger' => [
 248         "Finger protocol (RFC 742)",
 249         { action => 'PARAM', proto => 'tcp', dport => '79' },
 250     ],
 251     'GNUnet' => [
 252         "GNUnet secure peer-to-peer networking traffic",
 253         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 254         { action => 'PARAM', proto => 'udp', dport => '2086' },
 255         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 256         { action => 'PARAM', proto => 'udp', dport => '1080' },
 257     ],
 258     'GRE' => [
 259         "Generic Routing Encapsulation tunneling protocol",
 260         { action => 'PARAM', proto => '47' },
 261     ],
 262     'Git' => [
 263         "Git distributed revision control traffic",
 264         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 265     ],
 266     'HKP' => [
 267         "OpenPGP HTTP keyserver protocol traffic",
 268         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 269     ],
 270     'HTTP' => [
 271         "Hypertext Transfer Protocol (WWW)",
 272         { action => 'PARAM', proto => 'tcp', dport => '80' },
 273     ],
 274     'HTTPS' => [
 275         "Hypertext Transfer Protocol (WWW) over SSL",
 276         { action => 'PARAM', proto => 'tcp', dport => '443' },
 277     ],
 278     'ICPV2' => [
 279         "Internet Cache Protocol V2 (Squid) traffic",
 280         { action => 'PARAM', proto => 'udp', dport => '3130' },
 281     ],
 282     'ICQ' => [
 283         "AOL Instant Messenger traffic",
 284         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 285     ],
 286     'IMAP' => [
 287         "Internet Message Access Protocol",
 288         { action => 'PARAM', proto => 'tcp', dport => '143' },
 289     ],
 290     'IMAPS' => [
 291         "Internet Message Access Protocol over SSL",
 292         { action => 'PARAM', proto => 'tcp', dport => '993' },
 293     ],
 294     'IPIP' => [
 295         "IPIP capsulation traffic",
 296         { action => 'PARAM', proto => '94' },
 297     ],
 298     'IPsec' => [
 299         "IPsec traffic",
 300         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 301         { action => 'PARAM', proto => '50' },
 302     ],
 303     'IPsecah' => [
 304         "IPsec authentication (AH) traffic",
 305         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 306         { action => 'PARAM', proto => '51' },
 307     ],
 308     'IPsecnat' => [
 309         "IPsec traffic and Nat-Traversal",
 310         { action => 'PARAM', proto => 'udp', dport => '500' },
 311         { action => 'PARAM', proto => 'udp', dport => '4500' },
 312         { action => 'PARAM', proto => '50' },
 313     ],
 314     'IRC' => [
 315         "Internet Relay Chat traffic",
 316         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 317     ],
 318     'Jetdirect' => [
 319         "HP Jetdirect printing",
 320         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 321     ],
 322     'L2TP' => [
 323         "Layer 2 Tunneling Protocol traffic",
 324         { action => 'PARAM', proto => 'udp', dport => '1701' },
 325     ],
 326     'LDAP' => [
 327         "Lightweight Directory Access Protocol traffic",
 328         { action => 'PARAM', proto => 'tcp', dport => '389' },
 329     ],
 330     'LDAPS' => [
 331         "Secure Lightweight Directory Access Protocol traffic",
 332         { action => 'PARAM', proto => 'tcp', dport => '636' },
 333     ],
 334     'MSNP' => [
 335         "Microsoft Notification Protocol",
 336         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 337     ],
 338     'MSSQL' => [
 339         "Microsoft SQL Server",
 340         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 341     ],
 342     'Mail' => [
 343         "Mail traffic (SMTP, SMTPS, Submission)",
 344         { action => 'PARAM', proto => 'tcp', dport => '25' },
 345         { action => 'PARAM', proto => 'tcp', dport => '465' },
 346         { action => 'PARAM', proto => 'tcp', dport => '587' },
 347     ],
 348     'MDNS' => [
 349         "Multicast DNS",
 350         { action => 'PARAM', proto => 'udp', dport => '5353' },
 351     ],
 352     'Munin' => [
 353         "Munin networked resource monitoring traffic",
 354         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 355     ],
 356     'MySQL' => [
 357         "MySQL server",
 358         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 359     ],
 360     'NNTP' => [
 361         "NNTP traffic (Usenet).",
 362         { action => 'PARAM', proto => 'tcp', dport => '119' },
 363     ],
 364     'NNTPS' => [
 365         "Encrypted NNTP traffic (Usenet)",
 366         { action => 'PARAM', proto => 'tcp', dport => '563' },
 367     ],
 368     'NTP' => [
 369         "Network Time Protocol (ntpd)",
 370         { action => 'PARAM', proto => 'udp', dport => '123' },
 371     ],
 372     'OSPF' => [
 373         "OSPF multicast traffic",
 374         { action => 'PARAM', proto => '89' },
 375     ],
 376     'OpenVPN' => [
 377         "OpenVPN traffic",
 378         { action => 'PARAM', proto => 'udp', dport => '1194' },
 379     ],
 380     'PCA' => [
 381         "Symantec PCAnywere (tm)",
 382         { action => 'PARAM', proto => 'udp', dport => '5632' },
 383         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 384     ],
 385     'POP3' => [
 386         "POP3 traffic",
 387         { action => 'PARAM', proto => 'tcp', dport => '110' },
 388     ],
 389     'POP3S' => [
 390         "Encrypted POP3 traffic",
 391         { action => 'PARAM', proto => 'tcp', dport => '995' },
 392     ],
 393     'PPtP' => [
 394         "Point-to-Point Tunneling Protocol",
 395         { action => 'PARAM', proto => '47' },
 396         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 397     ],
 398     'Ping' => [
 399         "ICMP echo request",
 400         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 401     ],
 402     'PostgreSQL' => [
 403         "PostgreSQL server",
 404         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 405     ],
 406     'Printer' => [
 407         "Line Printer protocol printing",
 408         { action => 'PARAM', proto => 'tcp', dport => '515' },
 409     ],
 410     'RDP' => [
 411         "Microsoft Remote Desktop Protocol traffic",
 412         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 413     ],
 414     'RIP' => [
 415         "Routing Information Protocol (bidirectional)",
 416         { action => 'PARAM', proto => 'udp', dport => '520' },
 417     ],
 418     'RNDC' => [
 419         "BIND remote management protocol",
 420         { action => 'PARAM', proto => 'tcp', dport => '953' },
 421     ],
 422     'Razor' => [
 423         "Razor Antispam System",
 424         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 425     ],
 426     'Rdate' => [
 427         "Remote time retrieval (rdate)",
 428         { action => 'PARAM', proto => 'tcp', dport => '37' },
 429     ],
 430     'Rsync' => [
 431         "Rsync server",
 432         { action => 'PARAM', proto => 'tcp', dport => '873' },
 433     ],
 434     'SANE' => [
 435         "SANE network scanning",
 436         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 437     ],
 438     'SMB' => [
 439         "Microsoft SMB traffic",
 440         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 441         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 442         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 443         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 444     ],
 445     'SMBswat' => [
 446         "Samba Web Administration Tool",
 447         { action => 'PARAM', proto => 'tcp', dport => '901' },
 448     ],
 449     'SMTP' => [
 450         "Simple Mail Transfer Protocol",
 451         { action => 'PARAM', proto => 'tcp', dport => '25' },
 452     ],
 453     'SMTPS' => [
 454         "Encrypted Simple Mail Transfer Protocol",
 455         { action => 'PARAM', proto => 'tcp', dport => '465' },
 456     ],
 457     'SNMP' => [
 458         "Simple Network Management Protocol",
 459         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 460         { action => 'PARAM', proto => 'tcp', dport => '161' },
 461     ],
 462     'SPAMD' => [
 463         "Spam Assassin SPAMD traffic",
 464         { action => 'PARAM', proto => 'tcp', dport => '783' },
 465     ],
 466     'SSH' => [
 467         "Secure shell traffic",
 468         { action => 'PARAM', proto => 'tcp', dport => '22' },
 469     ],
 470     'SVN' => [
 471         "Subversion server (svnserve)",
 472         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 473     ],
 474     'SixXS' => [
 475         "SixXS IPv6 Deployment and Tunnel Broker",
 476         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 477         { action => 'PARAM', proto => 'udp', dport => '3740' },
 478         { action => 'PARAM', proto => '41' },
 479         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 480     ],
 481     'Squid' => [
 482         "Squid web proxy traffic",
 483         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 484     ],
 485     'Submission' => [
 486         "Mail message submission traffic",
 487         { action => 'PARAM', proto => 'tcp', dport => '587' },
 488     ],
 489     'Syslog' => [
 490         "Syslog protocol (RFC 5424) traffic",
 491         { action => 'PARAM', proto => 'udp', dport => '514' },
 492         { action => 'PARAM', proto => 'tcp', dport => '514' },
 493     ],
 494     'TFTP' => [
 495         "Trivial File Transfer Protocol traffic",
 496         { action => 'PARAM', proto => 'udp', dport => '69' },
 497     ],
 498     'Telnet' => [
 499         "Telnet traffic",
 500         { action => 'PARAM', proto => 'tcp', dport => '23' },
 501     ],
 502     'Telnets' => [
 503         "Telnet over SSL",
 504         { action => 'PARAM', proto => 'tcp', dport => '992' },
 505     ],
 506     'Time' => [
 507         "RFC 868 Time protocol",
 508         { action => 'PARAM', proto => 'tcp', dport => '37' },
 509     ],
 510     'Trcrt' => [
 511         "Traceroute (for up to 30 hops) traffic",
 512         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 513         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 514     ],
 515     'VNC' => [
 516         "VNC traffic for VNC display's 0 - 99",
 517         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 518     ],
 519     'VNCL' => [
 520         "VNC traffic from Vncservers to Vncviewers in listen mode",
 521         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 522     ],
 523     'Web' => [
 524         "WWW traffic (HTTP and HTTPS)",
 525         { action => 'PARAM', proto => 'tcp', dport => '80' },
 526         { action => 'PARAM', proto => 'tcp', dport => '443' },
 527     ],
 528     'Webcache' => [
 529         "Web Cache/Proxy traffic (port 8080)",
 530         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 531     ],
 532     'Webmin' => [
 533         "Webmin traffic",
 534         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 535     ],
 536     'Whois' => [
 537         "Whois (nicname, RFC 3912) traffic",
 538         { action => 'PARAM', proto => 'tcp', dport => '43' },
 539     ],
 540 };
 541
 542 my $pve_fw_parsed_macros;
 543 my $pve_fw_macro_descr;
 544 my $pve_fw_macro_ipversion = {};
 545 my $pve_fw_preferred_macro_names = {};
 546
 547 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 548 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 549
 550 my $pve_std_chains = {};
 551 $pve_std_chains->{4} = {
 552     'PVEFW-SET-ACCEPT-MARK' => [
 553         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 554     ],
 555     'PVEFW-DropBroadcast' => [
 556         # same as shorewall 'Broadcast'
 557         # simply DROP BROADCAST/MULTICAST/ANYCAST
 558         # we can use this to reduce logging
 559         { action => 'DROP', dsttype => 'BROADCAST' },
 560         { action => 'DROP', dsttype => 'MULTICAST' },
 561         { action => 'DROP', dsttype => 'ANYCAST' },
 562         { action => 'DROP', dest => '224.0.0.0/4' },
 563     ],
 564     'PVEFW-reject' => [
 565         # same as shorewall 'reject'
 566         { action => 'DROP', dsttype => 'BROADCAST' },
 567         { action => 'DROP', source => '224.0.0.0/4' },
 568         { action => 'DROP', proto => 'icmp' },
 569         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 570         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 571         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 572         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 573     ],
 574     'PVEFW-Drop' => [
 575         # same as shorewall 'Drop', which is equal to DROP,
 576         # but REJECT/DROP some packages to reduce logging,
 577         # and ACCEPT critical ICMP types
 578         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 579         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 580         { action => 'PVEFW-DropBroadcast' },
 581         # ACCEPT critical ICMP types
 582         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 583         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 584         # Drop packets with INVALID state
 585         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 586         # Drop Microsoft SMB noise
 587         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 588         { action => 'DROP', proto => 'udp', dport => '137:139'},
 589         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 590         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 591         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 592         # Drop new/NotSyn traffic so that it doesn't get logged
 593         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 594         # Drop DNS replies
 595         { action => 'DROP', proto => 'udp', sport => 53 },
 596     ],
 597     'PVEFW-Reject' => [
 598         # same as shorewall 'Reject', which is equal to Reject,
 599         # but REJECT/DROP some packages to reduce logging,
 600         # and ACCEPT critical ICMP types
 601         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 602         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 603         { action => 'PVEFW-DropBroadcast' },
 604         # ACCEPT critical ICMP types
 605         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 606         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 607         # Drop packets with INVALID state
 608         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 609         # Drop Microsoft SMB noise
 610         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 611         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 612         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 613         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 614         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 615         # Drop new/NotSyn traffic so that it doesn't get logged
 616         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 617         # Drop DNS replies
 618         { action => 'DROP', proto => 'udp', sport => 53 },
 619     ],
 620     'PVEFW-tcpflags' => [
 621         # same as shorewall tcpflags action.
 622         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 623         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 624         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 625         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 626         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 627         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 628     ],
 629     'PVEFW-smurfs' => [
 630         # same as shorewall smurfs action
 631         # Filter packets for smurfs (packets with a broadcast address as the source).
 632         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 633         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 634         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 635     ],
 636     'PVEFW-smurflog' => [
 637         { action => 'DROP', logmsg => 'DROP: ' },
 638     ],
 639     'PVEFW-logflags' => [
 640         { action => 'DROP', logmsg => 'DROP: ' },
 641     ],
 642 };
 643
 644 $pve_std_chains->{6} = {
 645     'PVEFW-SET-ACCEPT-MARK' => [
 646         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 647     ],
 648     'PVEFW-DropBroadcast' => [
 649         # same as shorewall 'Broadcast'
 650         # simply DROP BROADCAST/MULTICAST/ANYCAST
 651         # we can use this to reduce logging
 652         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 653         # ipv6 addrtype does not work with kernel 2.6.32
 654         #{ action => 'DROP', dsttype => 'MULTICAST' },
 655         #{ action => 'DROP', dsttype => 'ANYCAST' },
 656         { action => 'DROP', dest => 'ff00::/8' },
 657         #{ action => 'DROP', dest => '224.0.0.0/4' },
 658     ],
 659     'PVEFW-reject' => [
 660         # same as shorewall 'reject'
 661         #{ action => 'DROP', dsttype => 'BROADCAST' },
 662         #{ action => 'DROP', source => '224.0.0.0/4' },
 663         { action => 'DROP', proto => 'icmpv6' },
 664         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 665         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 666         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 667         #"-j REJECT --reject-with icmp-host-prohibited",
 668     ],
 669     'PVEFW-Drop' => [
 670         # same as shorewall 'Drop', which is equal to DROP,
 671         # but REJECT/DROP some packages to reduce logging,
 672         # and ACCEPT critical ICMP types
 673         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 674         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 675         { action => 'PVEFW-DropBroadcast' },
 676         # ACCEPT critical ICMP types
 677         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 678         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 679         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 680         # Drop packets with INVALID state
 681         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 682         # Drop Microsoft SMB noise
 683         { action => 'DROP', proto => 'udp', dport => '135,445', nbdport => 2 },
 684         { action => 'DROP', proto => 'udp', dport => '137:139'},
 685         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 686         { action => 'DROP', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 687         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 688         # Drop new/NotSyn traffic so that it doesn't get logged
 689         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 690         # Drop DNS replies
 691         { action => 'DROP', proto => 'udp', sport => 53 },
 692     ],
 693     'PVEFW-Reject' => [
 694         # same as shorewall 'Reject', which is equal to Reject,
 695         # but REJECT/DROP some packages to reduce logging,
 696         # and ACCEPT critical ICMP types
 697         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 698         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 699         { action => 'PVEFW-DropBroadcast' },
 700         # ACCEPT critical ICMP types
 701         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 702         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 703         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 704         # Drop packets with INVALID state
 705         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 706         # Drop Microsoft SMB noise
 707         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445', nbdport => 2 },
 708         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 709         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 710         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445', nbdport => 3 },
 711         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 712         # Drop new/NotSyn traffic so that it doesn't get logged
 713         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 714         # Drop DNS replies
 715         { action => 'DROP', proto => 'udp', sport => 53 },
 716     ],
 717     'PVEFW-tcpflags' => [
 718         # same as shorewall tcpflags action.
 719         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 720         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 721         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 722         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 723         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 724         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 725     ],
 726     'PVEFW-logflags' => [
 727         { action => 'DROP', logmsg => 'DROP: ' },
 728     ],
 729 };
 730
 731 # iptables -p icmp -h
 732 my $icmp_type_names = {
 733     any => 1,
 734     'echo-reply' => 1,
 735     'destination-unreachable' => 1,
 736     'network-unreachable' => 1,
 737     'host-unreachable' => 1,
 738     'protocol-unreachable' => 1,
 739     'port-unreachable' => 1,
 740     'fragmentation-needed' => 1,
 741     'source-route-failed' => 1,
 742     'network-unknown' => 1,
 743     'host-unknown' => 1,
 744     'network-prohibited' => 1,
 745     'host-prohibited' => 1,
 746     'TOS-network-unreachable' => 1,
 747     'TOS-host-unreachable' => 1,
 748     'communication-prohibited' => 1,
 749     'host-precedence-violation' => 1,
 750     'precedence-cutoff' => 1,
 751     'source-quench' => 1,
 752     'redirect' => 1,
 753     'network-redirect' => 1,
 754     'host-redirect' => 1,
 755     'TOS-network-redirect' => 1,
 756     'TOS-host-redirect' => 1,
 757     'echo-request' => 1,
 758     'router-advertisement' => 1,
 759     'router-solicitation' => 1,
 760     'time-exceeded' => 1,
 761     'ttl-zero-during-transit' => 1,
 762     'ttl-zero-during-reassembly' => 1,
 763     'parameter-problem' => 1,
 764     'ip-header-bad' => 1,
 765     'required-option-missing' => 1,
 766     'timestamp-request' => 1,
 767     'timestamp-reply' => 1,
 768     'address-mask-request' => 1,
 769     'address-mask-reply' => 1,
 770 };
 771
 772 # ip6tables -p icmpv6 -h
 773
 774 my $icmpv6_type_names = {
 775     'any' => 1,
 776     'destination-unreachable' => 1,
 777     'no-route' => 1,
 778     'communication-prohibited' => 1,
 779     'address-unreachable' => 1,
 780     'port-unreachable' => 1,
 781     'packet-too-big' => 1,
 782     'time-exceeded' => 1,
 783     'ttl-zero-during-transit' => 1,
 784     'ttl-zero-during-reassembly' => 1,
 785     'parameter-problem' => 1,
 786     'bad-header' => 1,
 787     'unknown-header-type' => 1,
 788     'unknown-option' => 1,
 789     'echo-request' => 1,
 790     'echo-reply' => 1,
 791     'router-solicitation' => 1,
 792     'router-advertisement' => 1,
 793     'neighbor-solicitation' => 1,
 794     'neighbour-solicitation' => 1,
 795     'neighbor-advertisement' => 1,
 796     'neighbour-advertisement' => 1,
 797     'redirect' => 1,
 798 };
 799
 800 sub init_firewall_macros {
 801
 802     $pve_fw_parsed_macros = {};
 803
 804     my $parse = sub {
 805         my ($k, $macro) = @_;
 806         my $lc_name = lc($k);
 807         $pve_fw_macro_ipversion->{$k} = 0;
 808         while (!ref($macro->[0])) {
 809             my $desc = shift @$macro;
 810             if ($desc eq 'ipv4only') {
 811                 $pve_fw_macro_ipversion->{$k} = 4;
 812             } elsif ($desc eq 'ipv6only') {
 813                 $pve_fw_macro_ipversion->{$k} = 6;
 814             } else {
 815                 $pve_fw_macro_descr->{$k} = $desc;
 816             }
 817         }
 818         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 819         $pve_fw_parsed_macros->{$k} = $macro;
 820     };
 821
 822     foreach my $k (keys %$pve_fw_macros) {
 823         &$parse($k, $pve_fw_macros->{$k});
 824     }
 825
 826     foreach my $k (keys %$pve_ipv6fw_macros) {
 827         next if $pve_fw_parsed_macros->{$k};
 828         &$parse($k, $pve_ipv6fw_macros->{$k});
 829         $pve_fw_macro_ipversion->{$k} = 6;
 830     }
 831 }
 832
 833 init_firewall_macros();
 834
 835 sub get_macros {
 836     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 837 }
 838
 839 my $etc_services;
 840
 841 sub get_etc_services {
 842
 843     return $etc_services if $etc_services;
 844
 845     my $filename = "/etc/services";
 846
 847     my $fh = IO::File->new($filename, O_RDONLY);
 848     if (!$fh) {
 849         warn "unable to read '$filename' - $!\n";
 850         return {};
 851     }
 852
 853     my $services = {};
 854
 855     while (my $line = <$fh>) {
 856         chomp ($line);
 857         next if $line =~m/^#/;
 858         next if ($line =~m/^\s*$/);
 859
 860         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 861             $services->{byid}->{$2}->{name} = $1;
 862             $services->{byid}->{$2}->{port} = $2;
 863             $services->{byid}->{$2}->{$3} = 1;
 864             $services->{byname}->{$1} = $services->{byid}->{$2};
 865         }
 866     }
 867
 868     close($fh);
 869
 870     $etc_services = $services;
 871
 872
 873     return $etc_services;
 874 }
 875
 876 my $etc_protocols;
 877
 878 sub get_etc_protocols {
 879     return $etc_protocols if $etc_protocols;
 880
 881     my $filename = "/etc/protocols";
 882
 883     my $fh = IO::File->new($filename, O_RDONLY);
 884     if (!$fh) {
 885         warn "unable to read '$filename' - $!\n";
 886         return {};
 887     }
 888
 889     my $protocols = {};
 890
 891     while (my $line = <$fh>) {
 892         chomp ($line);
 893         next if $line =~m/^#/;
 894         next if ($line =~m/^\s*$/);
 895
 896         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 897             $protocols->{byid}->{$2}->{name} = $1;
 898             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 899         }
 900     }
 901
 902     close($fh);
 903
 904     # add special case for ICMP v6
 905     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 906     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 907
 908     $etc_protocols = $protocols;
 909
 910     return $etc_protocols;
 911 }
 912
 913 my $__local_network;
 914
 915 sub local_network {
 916     my ($new_value) = @_;
 917
 918     $__local_network = $new_value if defined($new_value);
 919
 920     return $__local_network if defined($__local_network);
 921
 922     eval {
 923         my $nodename = PVE::INotify::nodename();
 924
 925         my $ip = PVE::Cluster::remote_node_ip($nodename);
 926
 927         my $testip = Net::IP->new($ip);
 928
 929         my $isv6 = $testip->version == 6;
 930         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 931                            : PVE::ProcFSTools::read_proc_net_route();
 932         foreach my $entry (@$routes) {
 933             my $mask;
 934             if ($isv6) {
 935                 $mask = $entry->{prefix};
 936                 next if !$mask; # skip the default route...
 937             } else {
 938                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 939                 next if !defined($mask);
 940             }
 941             my $cidr = "$entry->{dest}/$mask";
 942             my $testnet = Net::IP->new($cidr);
 943             my $overlap = $testnet->overlaps($testip);
 944             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 945                 $overlap == $Net::IP::IP_IDENTICAL)
 946             {
 947                 $__local_network = $cidr;
 948                 return;
 949             }
 950         }
 951     };
 952     warn $@ if $@;
 953
 954     return $__local_network;
 955 }
 956
 957 # ipset names are limited to 31 characters,
 958 # and we use '-v4' or '-v6' to indicate IP versions,
 959 # and we use '_swap' suffix for atomic update,
 960 # for example PVEFW-${VMID}-${ipset_name}_swap
 961
 962 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 963
 964 sub compute_ipset_chain_name {
 965     my ($vmid, $ipset_name, $ipversion) = @_;
 966
 967     $vmid = 0 if !defined($vmid);
 968
 969     my $id = "$vmid-${ipset_name}-v$ipversion";
 970
 971     if (length($id) > $max_iptables_ipset_name_length) {
 972         $id = PVE::Tools::fnv31a_hex($id);
 973     }
 974
 975     return "PVEFW-$id";
 976 }
 977
 978 sub compute_ipfilter_ipset_name {
 979     my ($iface) = @_;
 980
 981     return "ipfilter-$iface";
 982 }
 983
 984 sub parse_address_list {
 985     my ($str) = @_;
 986
 987     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 988         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 989         return;
 990     }
 991
 992     if ($str =~ m/^${ip_alias_pattern}$/) {
 993         die "alias name too long\n" if length($str) > $max_alias_name_length;
 994         return;
 995     }
 996
 997     my $count = 0;
 998     my $iprange = 0;
 999     my $ipversion;
1000
1001     my @elements = split(/,/, $str);
1002     die "extraneous commas in list\n" if $str ne join(',', @elements);
1003     foreach my $elem (@elements) {
1004         $count++;
1005         my $ip = Net::IP->new($elem);
1006         if (!$ip) {
1007             my $err = Net::IP::Error();
1008             die "invalid IP address: $err\n";
1009         }
1010         $iprange = 1 if $elem =~ m/-/;
1011
1012         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1013
1014         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1015             if $ipversion && ($new_ipversion != $ipversion);
1016
1017         $ipversion = $new_ipversion;
1018     }
1019
1020     die "you can't use a range in a list\n" if $iprange && $count > 1;
1021
1022     return $ipversion;
1023 }
1024
1025 sub parse_port_name_number_or_range {
1026     my ($str, $dport) = @_;
1027
1028     my $services = PVE::Firewall::get_etc_services();
1029     my $count = 0;
1030     my $icmp_port = 0;
1031
1032     my @elements = split(/,/, $str);
1033     die "extraneous commas in list\n" if $str ne join(',', @elements);
1034     foreach my $item (@elements) {
1035         $count++;
1036         if ($item =~ m/^(\d+):(\d+)$/) {
1037             my ($port1, $port2) = ($1, $2);
1038             die "invalid port '$port1'\n" if $port1 > 65535;
1039             die "invalid port '$port2'\n" if $port2 > 65535;
1040         } elsif ($item =~ m/^(\d+)$/) {
1041             my $port = $1;
1042             die "invalid port '$port'\n" if $port > 65535;
1043         } else {
1044             if ($dport && $icmp_type_names->{$item}) {
1045                 $icmp_port = 1;
1046             } elsif ($dport && $icmpv6_type_names->{$item}) {
1047                 $icmp_port = 1;
1048             } else {
1049                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1050             }
1051         }
1052     }
1053
1054     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1055
1056     return $count;
1057 }
1058
1059 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1060 sub pve_fw_verify_sport_spec {
1061    my ($portstr) = @_;
1062
1063    parse_port_name_number_or_range($portstr, 0);
1064
1065    return $portstr;
1066 }
1067
1068 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1069 sub pve_fw_verify_dport_spec {
1070    my ($portstr) = @_;
1071
1072    parse_port_name_number_or_range($portstr, 1);
1073
1074    return $portstr;
1075 }
1076
1077 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1078 sub pve_fw_verify_addr_spec {
1079    my ($list) = @_;
1080
1081    parse_address_list($list);
1082
1083    return $list;
1084 }
1085
1086 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1087 sub pve_fw_verify_protocol_spec {
1088    my ($proto) = @_;
1089
1090    my $protocols = get_etc_protocols();
1091
1092    die "unknown protocol '$proto'\n" if $proto &&
1093        !(defined($protocols->{byname}->{$proto}) ||
1094          defined($protocols->{byid}->{$proto}));
1095
1096    return $proto;
1097 }
1098
1099
1100 # helper function for API
1101
1102 sub copy_opject_with_digest {
1103     my ($object) = @_;
1104
1105     my $sha = Digest::SHA->new('sha1');
1106
1107     my $res = {};
1108     foreach my $k (sort keys %$object) {
1109         my $v = $object->{$k};
1110         next if !defined($v);
1111         $res->{$k} = $v;
1112         $sha->add($k, ':', $v, "\n");
1113     }
1114
1115     my $digest = $sha->hexdigest;
1116
1117     $res->{digest} = $digest;
1118
1119     return wantarray ? ($res, $digest) : $res;
1120 }
1121
1122 sub copy_list_with_digest {
1123     my ($list) = @_;
1124
1125     my $sha = Digest::SHA->new('sha1');
1126
1127     my $res = [];
1128     foreach my $entry (@$list) {
1129         my $data = {};
1130         foreach my $k (sort keys %$entry) {
1131             my $v = $entry->{$k};
1132             next if !defined($v);
1133             $data->{$k} = $v;
1134             # Note: digest ignores refs ($rule->{errors})
1135             # since Digest::SHA expects a series of bytes,
1136             #  we have to encode the value here to prevent errors when
1137             #  using utf8 characters (eg. in comments)
1138             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1139         }
1140         push @$res, $data;
1141     }
1142
1143     my $digest = $sha->hexdigest;
1144
1145     foreach my $entry (@$res) {
1146         $entry->{digest} = $digest;
1147     }
1148
1149     return wantarray ? ($res, $digest) : $res;
1150 }
1151
1152 our $cluster_option_properties = {
1153     enable => {
1154         description => "Enable or disable the firewall cluster wide.",
1155         type => 'integer',
1156         minimum => 0,
1157         optional => 1,
1158     },
1159     policy_in => {
1160         description => "Input policy.",
1161         type => 'string',
1162         optional => 1,
1163         enum => ['ACCEPT', 'REJECT', 'DROP'],
1164     },
1165     policy_out => {
1166         description => "Output policy.",
1167         type => 'string',
1168         optional => 1,
1169         enum => ['ACCEPT', 'REJECT', 'DROP'],
1170     },
1171 };
1172
1173 our $host_option_properties = {
1174     enable => {
1175         description => "Enable host firewall rules.",
1176         type => 'boolean',
1177         optional => 1,
1178     },
1179     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1180         description => "Log level for incoming traffic." }),
1181     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1182         description => "Log level for outgoing traffic." }),
1183     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1184         description => "Log level for illegal tcp flags filter." }),
1185     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1186         description => "Log level for SMURFS filter." }),
1187     nosmurfs => {
1188         description => "Enable SMURFS filter.",
1189         type => 'boolean',
1190         optional => 1,
1191     },
1192     tcpflags => {
1193         description => "Filter illegal combinations of TCP flags.",
1194         type => 'boolean',
1195         optional => 1,
1196     },
1197     nf_conntrack_max => {
1198         description => "Maximum number of tracked connections.",
1199         type => 'integer',
1200         optional => 1,
1201         minimum => 32768,
1202     },
1203     nf_conntrack_tcp_timeout_established => {
1204         description => "Conntrack established timeout.",
1205         type => 'integer',
1206         optional => 1,
1207         minimum => 7875,
1208     },
1209     ndp => {
1210         description => "Enable NDP.",
1211         type => 'boolean',
1212         optional => 1,
1213     },
1214 };
1215
1216 our $vm_option_properties = {
1217     enable => {
1218         description => "Enable/disable firewall rules.",
1219         type => 'boolean',
1220         optional => 1,
1221     },
1222     macfilter => {
1223         description => "Enable/disable MAC address filter.",
1224         type => 'boolean',
1225         optional => 1,
1226     },
1227     dhcp => {
1228         description => "Enable DHCP.",
1229         type => 'boolean',
1230         optional => 1,
1231     },
1232     ndp => {
1233         description => "Enable NDP.",
1234         type => 'boolean',
1235         optional => 1,
1236     },
1237     radv => {
1238         description => "Allow sending Router Advertisement.",
1239         type => 'boolean',
1240         optional => 1,
1241     },
1242     ipfilter => {
1243         description => "Enable default IP filters. " .
1244            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1245            "for every interface. Such ipsets implicitly contain sane default " .
1246            "restrictions such as restricting IPv6 link local addresses to " .
1247            "the one derived from the interface's MAC address. For containers " .
1248            "the configured IP addresses will be implicitly added.",
1249         type => 'boolean',
1250         optional => 1,
1251     },
1252     policy_in => {
1253         description => "Input policy.",
1254         type => 'string',
1255         optional => 1,
1256         enum => ['ACCEPT', 'REJECT', 'DROP'],
1257     },
1258     policy_out => {
1259         description => "Output policy.",
1260         type => 'string',
1261         optional => 1,
1262         enum => ['ACCEPT', 'REJECT', 'DROP'],
1263     },
1264     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1265         description => "Log level for incoming traffic." }),
1266     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1267         description => "Log level for outgoing traffic." }),
1268
1269 };
1270
1271
1272 my $addr_list_descr = "This can refer to a single IP address, an IP set ('+ipsetname') or an IP alias definition. You can also specify an address range like '20.34.101.207-201.3.9.99', or a list of IP addresses and networks (entries are separated by comma). Please do not mix IPv4 and IPv6 addresses inside such lists.";
1273
1274 my $port_descr = "You can use service names or simple numbers (0-65535), as defined in '/etc/services'. Port ranges can be specified with '\\d+:\\d+', for example '80:85', and you can use comma separated list to match several ports or ranges.";
1275
1276 my $rule_properties = {
1277     pos => {
1278         description => "Update rule at position <pos>.",
1279         type => 'integer',
1280         minimum => 0,
1281         optional => 1,
1282     },
1283     digest => get_standard_option('pve-config-digest'),
1284     type => {
1285         description => "Rule type.",
1286         type => 'string',
1287         optional => 1,
1288         enum => ['in', 'out', 'group'],
1289     },
1290     action => {
1291         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1292         type => 'string',
1293         optional => 1,
1294         pattern => $security_group_name_pattern,
1295         maxLength => 20,
1296         minLength => 2,
1297     },
1298     macro => {
1299         description => "Use predefined standard macro.",
1300         type => 'string',
1301         optional => 1,
1302         maxLength => 128,
1303     },
1304     iface => get_standard_option('pve-iface', {
1305         description => "Network interface name. You have to use network configuration key names for VMs and containers ('net\\d+'). Host related rules can use arbitrary strings.",
1306         optional => 1
1307     }),
1308     source => {
1309         description => "Restrict packet source address. $addr_list_descr",
1310         type => 'string', format => 'pve-fw-addr-spec',
1311         optional => 1,
1312     },
1313     dest => {
1314         description => "Restrict packet destination address. $addr_list_descr",
1315         type => 'string', format => 'pve-fw-addr-spec',
1316         optional => 1,
1317     },
1318     proto => {
1319         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1320         type => 'string', format => 'pve-fw-protocol-spec',
1321         optional => 1,
1322     },
1323     enable => {
1324         description => "Flag to enable/disable a rule.",
1325         type => 'integer',
1326         minimum => 0,
1327         optional => 1,
1328     },
1329     sport => {
1330         description => "Restrict TCP/UDP source port. $port_descr",
1331         type => 'string', format => 'pve-fw-sport-spec',
1332         optional => 1,
1333     },
1334     dport => {
1335         description => "Restrict TCP/UDP destination port. $port_descr",
1336         type => 'string', format => 'pve-fw-dport-spec',
1337         optional => 1,
1338     },
1339     comment => {
1340         description => "Descriptive comment.",
1341         type => 'string',
1342         optional => 1,
1343     },
1344 };
1345
1346 sub add_rule_properties {
1347     my ($properties) = @_;
1348
1349     foreach my $k (keys %$rule_properties) {
1350         my $h = $rule_properties->{$k};
1351         # copy data, so that we can modify later without side effects
1352         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1353     }
1354
1355     return $properties;
1356 }
1357
1358 sub delete_rule_properties {
1359     my ($rule, $delete_str) = @_;
1360
1361     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1362         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1363             if !defined($rule_properties->{$opt});
1364         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1365             if $opt eq 'type' || $opt eq 'action';
1366         delete $rule->{$opt};
1367     }
1368
1369     return $rule;
1370 }
1371
1372 my $apply_macro = sub {
1373     my ($macro_name, $param, $verify, $ipversion) = @_;
1374
1375     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1376     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1377
1378     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1379         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1380     }
1381
1382     # skip macros which are specific to another ipversion
1383     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1384         return if $ipversion != $required;
1385     }
1386
1387     my $rules = [];
1388
1389     foreach my $templ (@$macro_rules) {
1390         my $rule = {};
1391         my $param_used = {};
1392         foreach my $k (keys %$templ) {
1393             my $v = $templ->{$k};
1394             if ($v eq 'PARAM') {
1395                 $v = $param->{$k};
1396                 $param_used->{$k} = 1;
1397             } elsif ($v eq 'DEST') {
1398                 $v = $param->{dest};
1399                 $param_used->{dest} = 1;
1400             } elsif ($v eq 'SOURCE') {
1401                 $v = $param->{source};
1402                 $param_used->{source} = 1;
1403             }
1404
1405             if (!defined($v)) {
1406                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1407                 raise_param_exc({ macro => $msg }) if $verify;
1408                 die "$msg\n";
1409             }
1410             $rule->{$k} = $v;
1411         }
1412         foreach my $k (keys %$param) {
1413             next if $k eq 'macro';
1414             next if !defined($param->{$k});
1415             next if $param_used->{$k};
1416             if (defined($rule->{$k})) {
1417                 if ($rule->{$k} ne $param->{$k}) {
1418                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1419                     raise_param_exc({ $k => $msg }) if $verify;
1420                     die "$msg\n";
1421                 }
1422             } else {
1423                 $rule->{$k} = $param->{$k};
1424             }
1425         }
1426         push @$rules, $rule;
1427     }
1428
1429     return $rules;
1430 };
1431
1432 my $rule_env_iface_lookup = {
1433     'ct' => 1,
1434     'vm' => 1,
1435     'group' => 0,
1436     'cluster' => 1,
1437     'host' => 1,
1438 };
1439
1440 sub verify_rule {
1441     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1442
1443     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1444
1445     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1446     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1447
1448     my $errors = $rule->{errors} || {};
1449
1450     my $error_count = 0;
1451
1452     my $add_error = sub {
1453         my ($param, $msg)  = @_;
1454         chomp $msg;
1455         raise_param_exc({ $param => $msg }) if !$noerr;
1456         $error_count++;
1457         $errors->{$param} = $msg if !$errors->{$param};
1458     };
1459
1460     my $ipversion;
1461     my $set_ip_version = sub {
1462         my $vers = shift;
1463         if ($vers) {
1464             die "detected mixed ipv4/ipv6 adresses in rule\n"
1465                 if $ipversion && ($vers != $ipversion);
1466             $ipversion = $vers;
1467         }
1468     };
1469
1470     my $check_ipset_or_alias_property = sub {
1471         my ($name, $expected_ipversion) = @_;
1472
1473         if (my $value = $rule->{$name}) {
1474             if ($value =~ m/^\+/) {
1475                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1476                     &$add_error($name, "no such ipset '$1'")
1477                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1478
1479                 } else {
1480                     &$add_error($name, "invalid ipset name '$value'");
1481                 }
1482             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1483                 my $alias = lc($value);
1484                 &$add_error($name, "no such alias '$value'")
1485                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1486                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1487                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1488
1489                 &$set_ip_version($e->{ipversion});
1490             }
1491         }
1492     };
1493
1494     my $type = $rule->{type};
1495     my $action = $rule->{action};
1496
1497     &$add_error('type', "missing property") if !$type;
1498     &$add_error('action', "missing property") if !$action;
1499
1500     if ($type) {
1501         if ($type eq  'in' || $type eq 'out') {
1502             &$add_error('action', "unknown action '$action'")
1503                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1504         } elsif ($type eq 'group') {
1505             &$add_error('type', "security groups not allowed")
1506                 if !$allow_groups;
1507             &$add_error('action', "invalid characters in security group name")
1508                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1509         } else {
1510             &$add_error('type', "unknown rule type '$type'");
1511         }
1512     }
1513
1514     if ($rule->{iface}) {
1515         &$add_error('type', "parameter -i not allowed for this rule type")
1516             if !$allow_iface;
1517         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1518         &$add_error('iface', $@) if $@;
1519         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1520             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1521                 if $rule->{iface} !~  m/^net(\d+)$/;
1522         }
1523     }
1524
1525     if ($rule->{macro}) {
1526         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1527             $rule->{macro} = $preferred_name;
1528         } else {
1529             &$add_error('macro', "unknown macro '$rule->{macro}'");
1530         }
1531     }
1532
1533     if ($rule->{proto}) {
1534         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1535         &$add_error('proto', $@) if $@;
1536         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1537         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1538     }
1539
1540     if ($rule->{dport}) {
1541         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1542         &$add_error('dport', $@) if $@;
1543         my $proto = $rule->{proto};
1544         &$add_error('proto', "missing property - 'dport' requires this property")
1545             if !$proto;
1546         &$add_error('dport', "protocol '$proto' does not support ports")
1547             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1548                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1549     }
1550
1551     if ($rule->{sport}) {
1552         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1553         &$add_error('sport', $@) if $@;
1554         my $proto = $rule->{proto};
1555         &$add_error('proto', "missing property - 'sport' requires this property")
1556             if !$proto;
1557         &$add_error('sport', "protocol '$proto' does not support ports")
1558             if !$PROTOCOLS_WITH_PORTS->{$proto};
1559     }
1560
1561     if ($rule->{source}) {
1562         eval {
1563             my $source_ipversion = parse_address_list($rule->{source});
1564             &$set_ip_version($source_ipversion);
1565         };
1566         &$add_error('source', $@) if $@;
1567         &$check_ipset_or_alias_property('source', $ipversion);
1568     }
1569
1570     if ($rule->{dest}) {
1571         eval {
1572             my $dest_ipversion = parse_address_list($rule->{dest});
1573             &$set_ip_version($dest_ipversion);
1574         };
1575         &$add_error('dest', $@) if $@;
1576         &$check_ipset_or_alias_property('dest', $ipversion);
1577     }
1578
1579     $rule->{ipversion} = $ipversion if $ipversion;
1580
1581     if ($rule->{macro} && !$error_count) {
1582         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1583         if (my $err = $@) {
1584             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1585                 my $eh = $err->{errors};
1586                 foreach my $p (keys %$eh) {
1587                     &$add_error($p, $eh->{$p});
1588                 }
1589             } else {
1590                 &$add_error('macro', "$err");
1591             }
1592         }
1593     }
1594
1595     $rule->{errors} = $errors if $error_count;
1596
1597     return $rule;
1598 }
1599
1600 sub copy_rule_data {
1601     my ($rule, $param) = @_;
1602
1603     foreach my $k (keys %$rule_properties) {
1604         if (defined(my $v = $param->{$k})) {
1605             if ($v eq '' || $v eq '-') {
1606                 delete $rule->{$k};
1607             } else {
1608                 $rule->{$k} = $v;
1609             }
1610         }
1611     }
1612
1613     return $rule;
1614 }
1615
1616 sub rules_modify_permissions {
1617     my ($rule_env) = @_;
1618
1619     if ($rule_env eq 'host') {
1620         return {
1621             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1622         };
1623     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1624         return {
1625             check => ['perm', '/', [ 'Sys.Modify' ]],
1626         };
1627     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1628         return {
1629             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1630         }
1631     }
1632
1633     return undef;
1634 }
1635
1636 sub rules_audit_permissions {
1637     my ($rule_env) = @_;
1638
1639     if ($rule_env eq 'host') {
1640         return {
1641             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1642         };
1643     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1644         return {
1645             check => ['perm', '/', [ 'Sys.Audit' ]],
1646         };
1647     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1648         return {
1649             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1650         }
1651     }
1652
1653     return undef;
1654 }
1655
1656 # core functions
1657 my $bridge_firewall_enabled = 0;
1658
1659 sub enable_bridge_firewall {
1660
1661     return if $bridge_firewall_enabled; # only once
1662
1663     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1664     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1665
1666     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1667     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1668
1669     $bridge_firewall_enabled = 1;
1670 }
1671
1672 sub iptables_restore_cmdlist {
1673     my ($cmdlist) = @_;
1674
1675     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1676 }
1677
1678 sub ip6tables_restore_cmdlist {
1679     my ($cmdlist) = @_;
1680
1681     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1682 }
1683
1684 sub ipset_restore_cmdlist {
1685     my ($cmdlist) = @_;
1686
1687     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1688 }
1689
1690 sub iptables_get_chains {
1691     my ($iptablescmd) = @_;
1692
1693     $iptablescmd = "iptables" if !$iptablescmd;
1694
1695     my $res = {};
1696
1697     # check what chains we want to track
1698     my $is_pvefw_chain = sub {
1699         my $name = shift;
1700
1701         return 1 if $name =~ m/^PVEFW-\S+$/;
1702
1703         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1704
1705         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1706
1707         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1708         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1709
1710         return undef;
1711     };
1712
1713     my $table = '';
1714
1715     my $hooks = {};
1716
1717     my $parser = sub {
1718         my $line = shift;
1719
1720         return if $line =~ m/^#/;
1721         return if $line =~ m/^\s*$/;
1722
1723         if ($line =~ m/^\*(\S+)$/) {
1724             $table = $1;
1725             return;
1726         }
1727
1728         return if $table ne 'filter';
1729
1730         if ($line =~ m/^:(\S+)\s/) {
1731             my $chain = $1;
1732             return if !&$is_pvefw_chain($chain);
1733             $res->{$chain} = "unknown";
1734         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1735             my ($chain, $sig) = ($1, $2);
1736             return if !&$is_pvefw_chain($chain);
1737             $res->{$chain} = $sig;
1738         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1739             $hooks->{$1} = 1;
1740         } else {
1741             # simply ignore the rest
1742             return;
1743         }
1744     };
1745
1746     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1747
1748     return wantarray ? ($res, $hooks) : $res;
1749 }
1750
1751 sub iptables_chain_digest {
1752     my ($rules) = @_;
1753     my $digest = Digest::SHA->new('sha1');
1754     foreach my $rule (@$rules) { # order is important
1755         $digest->add($rule);
1756     }
1757     return $digest->b64digest;
1758 }
1759
1760 sub ipset_chain_digest {
1761     my ($rules) = @_;
1762
1763     my $digest = Digest::SHA->new('sha1');
1764     foreach my $rule (sort @$rules) { # note: sorted
1765         $digest->add($rule);
1766     }
1767     return $digest->b64digest;
1768 }
1769
1770 sub ipset_get_chains {
1771
1772     my $res = {};
1773     my $chains = {};
1774
1775     my $parser = sub {
1776         my $line = shift;
1777
1778         return if $line =~ m/^#/;
1779         return if $line =~ m/^\s*$/;
1780         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1781             my $chain = $1;
1782             $line =~ s/\s+$//; # delete trailing white space
1783             push @{$chains->{$chain}}, $line;
1784         } else {
1785             # simply ignore the rest
1786             return;
1787         }
1788     };
1789
1790     run_command("/sbin/ipset save", outfunc => $parser);
1791
1792     # compute digest for each chain
1793     foreach my $chain (keys %$chains) {
1794         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1795     }
1796
1797     return $res;
1798 }
1799
1800 sub ruleset_generate_match {
1801     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1802
1803     return if defined($rule->{enable}) && !$rule->{enable};
1804     return if $rule->{errors};
1805
1806     return $rule->{match} if defined $rule->{match};
1807
1808     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1809
1810     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1811     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1812
1813     my @cmd = ();
1814
1815     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1816     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1817
1818     my $source = $rule->{source};
1819     my $dest = $rule->{dest};
1820
1821     if ($source) {
1822         if ($source =~ m/^\+/) {
1823             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1824                 my $name = $1;
1825                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1826                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1827                     push @cmd, "-m set --match-set ${ipset_chain} src";
1828                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1829                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1830                     push @cmd, "-m set --match-set ${ipset_chain} src";
1831                 } else {
1832                     die "no such ipset '$name'\n";
1833                 }
1834             } else {
1835                 die "invalid security group name '$source'\n";
1836             }
1837         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1838             my $alias = lc($source);
1839             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1840             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1841             die "no such alias '$source'\n" if !$e;
1842             push @cmd, "-s $e->{cidr}";
1843         } elsif ($source =~ m/\-/){
1844             push @cmd, "-m iprange --src-range $source";
1845         } else {
1846             push @cmd, "-s $source";
1847         }
1848     }
1849
1850     if ($dest) {
1851         if ($dest =~ m/^\+/) {
1852             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1853                 my $name = $1;
1854                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1855                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1856                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1857                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1858                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1859                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1860                 } else {
1861                     die "no such ipset '$name'\n";
1862                 }
1863             } else {
1864                 die "invalid security group name '$dest'\n";
1865             }
1866         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1867             my $alias = lc($dest);
1868             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1869             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1870             die "no such alias '$dest'\n" if !$e;
1871             push @cmd, "-d $e->{cidr}";
1872         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1873             push @cmd, "-m iprange --dst-range $dest";
1874         } else {
1875             push @cmd, "-d $dest";
1876         }
1877     }
1878
1879     if (my $proto = $rule->{proto}) {
1880         push @cmd, "-p $proto";
1881
1882         my $multiport = 0;
1883         $multiport++ if $nbdport > 1;
1884         $multiport++ if $nbsport > 1;
1885
1886         push @cmd, "--match multiport" if $multiport;
1887
1888         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1889             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1890
1891         if ($rule->{dport}) {
1892             if ($proto eq 'icmp') {
1893                 # Note: we use dport to store --icmp-type
1894                 die "unknown icmp-type '$rule->{dport}'\n"
1895                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1896                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1897             } elsif ($proto eq 'icmpv6') {
1898                 # Note: we use dport to store --icmpv6-type
1899                 die "unknown icmpv6-type '$rule->{dport}'\n"
1900                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1901                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1902             } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1903                 die "protocol $proto does not have ports\n";
1904             } else {
1905                 if ($nbdport > 1) {
1906                     if ($multiport == 2) {
1907                         push @cmd,  "--ports $rule->{dport}";
1908                     } else {
1909                         push @cmd, "--dports $rule->{dport}";
1910                     }
1911                 } else {
1912                     push @cmd, "--dport $rule->{dport}";
1913                 }
1914             }
1915         }
1916
1917         if ($rule->{sport}) {
1918             die "protocol $proto does not have ports\n"
1919                  if !$PROTOCOLS_WITH_PORTS->{$proto};
1920             if ($nbsport > 1) {
1921                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1922             } else {
1923                 push @cmd, "--sport $rule->{sport}";
1924             }
1925         }
1926     } elsif ($rule->{dport} || $rule->{sport}) {
1927         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1928         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1929     }
1930
1931     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1932
1933     return scalar(@cmd) ? join(' ', @cmd) : undef;
1934 }
1935
1936 sub ruleset_generate_action {
1937     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1938
1939     return $rule->{target} if defined $rule->{target};
1940
1941     my @cmd = ();
1942
1943     if (my $action = $rule->{action}) {
1944         $action = $actions->{$action} if defined($actions->{$action});
1945         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1946         push @cmd, $goto ? "-g $action" : "-j $action";
1947     }
1948
1949     return scalar(@cmd) ? join(' ', @cmd) : undef;
1950 }
1951
1952 sub ruleset_generate_cmdstr {
1953     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1954     my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1955     my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf);
1956
1957     return undef if !(defined($match) or defined($action));
1958     my $ret = defined($match) ? $match : "";
1959     $ret = "$ret $action" if defined($action);
1960     return $ret;
1961 }
1962
1963 sub ruleset_generate_rule {
1964     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1965
1966     my $rules;
1967
1968     if ($rule->{macro}) {
1969         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1970     } else {
1971         $rules = [ $rule ];
1972     }
1973
1974     # update all or nothing
1975
1976     # fixme: lots of temporary ugliness
1977     my @mstrs = ();
1978     my @astrs = ();
1979     my @logging = ();
1980     my @logmsg = ();
1981     foreach my $tmp (@$rules) {
1982         my $m = ruleset_generate_match($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1983         my $a = ruleset_generate_action($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf);
1984         if (defined $m or defined $a) {
1985             push @mstrs, defined($m) ? $m : "";
1986             push @astrs, defined($a) ? $a : "";
1987             push @logging, $tmp->{log};
1988             push @logmsg, $tmp->{logmsg};
1989         }
1990     }
1991
1992     for my $i (0 .. $#mstrs) {
1993         ruleset_addrule($ruleset, $chain, $mstrs[$i], $astrs[$i], $logging[$i], $logmsg[$i]);
1994     }
1995 }
1996
1997 sub ruleset_generate_rule_insert {
1998     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1999
2000     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
2001
2002     my $match = ruleset_generate_match($ruleset, $chain, $ipversion, $rule, $actions, $goto);
2003     my $action = ruleset_generate_action($ruleset, $chain, $ipversion, $rule, $actions, $goto);
2004     if (defined $match && defined $action) {
2005         ruleset_insertrule($ruleset, $chain, $match, $action);
2006     }
2007 }
2008
2009 sub ruleset_create_chain {
2010     my ($ruleset, $chain) = @_;
2011
2012     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2013     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2014
2015     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2016
2017     $ruleset->{$chain} = [];
2018 }
2019
2020 sub ruleset_chain_exist {
2021     my ($ruleset, $chain) = @_;
2022
2023     return $ruleset->{$chain} ? 1 : undef;
2024 }
2025
2026 sub ruleset_addrule {
2027    my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2028
2029    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2030
2031    if (defined($log) && $log) {
2032         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2033         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2034    }
2035    push @{$ruleset->{$chain}}, "-A $chain $match $action";
2036 }
2037
2038 sub ruleset_insertrule {
2039    my ($ruleset, $chain, $match, $action, $log) = @_;
2040
2041    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2042
2043    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2044 }
2045
2046 sub get_log_rule_base {
2047     my ($chain, $vmid, $msg, $loglevel) = @_;
2048
2049     $vmid = 0 if !defined($vmid);
2050     $msg = "" if !defined($msg);
2051
2052     # Note: we use special format for prefix to pass further
2053     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2054
2055     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2056 }
2057
2058 sub ruleset_add_chain_policy {
2059     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2060
2061     if ($policy eq 'ACCEPT') {
2062
2063         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2064                               { ACCEPT =>  $accept_action});
2065
2066     } elsif ($policy eq 'DROP') {
2067
2068         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2069
2070         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2071     } elsif ($policy eq 'REJECT') {
2072         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2073
2074         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2075     } else {
2076         # should not happen
2077         die "internal error: unknown policy '$policy'";
2078     }
2079 }
2080
2081 sub ruleset_chain_add_ndp {
2082     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2083     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2084
2085     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2086     if ($direction ne 'OUT' || $options->{radv}) {
2087         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2088     }
2089     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2090     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2091 }
2092
2093 sub ruleset_chain_add_conn_filters {
2094     my ($ruleset, $chain, $accept) = @_;
2095
2096     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2097     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2098 }
2099
2100 sub ruleset_chain_add_input_filters {
2101     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2102
2103     if ($cluster_conf->{ipset}->{blacklist}){
2104         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2105             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2106             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2107         }
2108         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2109         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2110     }
2111
2112     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2113         if ($ipversion == 4) {
2114             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2115         }
2116     }
2117
2118     if ($options->{tcpflags}) {
2119         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2120     }
2121 }
2122
2123 sub ruleset_create_vm_chain {
2124     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2125
2126     ruleset_create_chain($ruleset, $chain);
2127     my $accept = generate_nfqueue($options);
2128
2129     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2130         if ($ipversion == 4) {
2131             if ($direction eq 'OUT') {
2132                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2133                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2134                                         proto => 'udp', sport => 68, dport => 67 });
2135             } else {
2136                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2137                                       { action => 'ACCEPT',
2138                                         proto => 'udp', sport => 67, dport => 68 });
2139             }
2140         } elsif ($ipversion == 6) {
2141             if ($direction eq 'OUT') {
2142                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2143                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2144                                         proto => 'udp', sport => 546, dport => 547 });
2145             } else {
2146                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2147                                       { action => 'ACCEPT',
2148                                         proto => 'udp', sport => 547, dport => 546 });
2149             }
2150         }
2151
2152     }
2153
2154     if ($direction eq 'OUT') {
2155         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2156             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2157         }
2158         if ($ipversion == 6 && !$options->{radv}) {
2159             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2160         }
2161         if ($ipfilter_ipset) {
2162             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2163         }
2164         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2165     }
2166
2167     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2168     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2169 }
2170
2171 sub ruleset_add_group_rule {
2172     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2173
2174     my $group = $rule->{action};
2175     my $group_chain = "GROUP-$group-$direction";
2176     if(!ruleset_chain_exist($ruleset, $group_chain)){
2177         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2178     }
2179
2180     if ($direction eq 'OUT' && $rule->{iface_out}) {
2181         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2182     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2183         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2184     } else {
2185         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2186     }
2187
2188     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2189 }
2190
2191 sub ruleset_generate_vm_rules {
2192     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2193
2194     my $lc_direction = lc($direction);
2195
2196     my $in_accept = generate_nfqueue($options);
2197
2198     foreach my $rule (@$rules) {
2199         next if $rule->{iface} && $rule->{iface} ne $netid;
2200         next if !$rule->{enable} || $rule->{errors};
2201         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2202
2203         if ($rule->{type} eq 'group') {
2204             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2205                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2206         } else {
2207             next if $rule->{type} ne $lc_direction;
2208             eval {
2209                 if ($direction eq 'OUT') {
2210                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2211                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2212                                           undef, $cluster_conf, $vmfw_conf);
2213                 } else {
2214                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2215                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2216                                           undef, $cluster_conf, $vmfw_conf);
2217                 }
2218             };
2219             warn $@ if $@;
2220         }
2221     }
2222 }
2223
2224 sub generate_nfqueue {
2225     my ($options) = @_;
2226
2227     if ($options->{ips}) {
2228         my $action = "NFQUEUE";
2229         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2230             if (defined($3) && defined($1)) {
2231                 $action .= " --queue-balance $1:$3";
2232             } elsif (defined($1)) {
2233                 $action .= " --queue-num $1";
2234             }
2235         }
2236         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2237         return $action;
2238     } else {
2239         return "ACCEPT";
2240     }
2241 }
2242
2243 sub ruleset_generate_vm_ipsrules {
2244     my ($ruleset, $options, $direction, $iface) = @_;
2245
2246     if ($options->{ips} && $direction eq 'IN') {
2247         my $nfqueue = generate_nfqueue($options);
2248
2249         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2250             ruleset_create_chain($ruleset, "PVEFW-IPS");
2251         }
2252
2253         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2254     }
2255 }
2256
2257 sub generate_tap_rules_direction {
2258     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2259
2260     my $lc_direction = lc($direction);
2261
2262     my $rules = $vmfw_conf->{rules};
2263
2264     my $options = $vmfw_conf->{options};
2265     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2266
2267     my $tapchain = "$iface-$direction";
2268
2269     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2270     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2271         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2272
2273     # create chain with mac and ip filter
2274     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2275
2276     if ($options->{enable}) {
2277         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2278
2279         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2280
2281         # implement policy
2282         my $policy;
2283
2284         if ($direction eq 'OUT') {
2285             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2286         } else {
2287         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2288         }
2289
2290         my $accept = generate_nfqueue($options);
2291         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2292         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2293     } else {
2294         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2295         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2296     }
2297
2298     # plug the tap chain to bridge chain
2299     if ($direction eq 'IN') {
2300         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2301                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2302     } else {
2303         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2304                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2305     }
2306 }
2307
2308 sub enable_host_firewall {
2309     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2310
2311     my $options = $hostfw_conf->{options};
2312     my $cluster_options = $cluster_conf->{options};
2313     my $rules = $hostfw_conf->{rules};
2314     my $cluster_rules = $cluster_conf->{rules};
2315
2316     # host inbound firewall
2317     my $chain = "PVEFW-HOST-IN";
2318     ruleset_create_chain($ruleset, $chain);
2319
2320     my $loglevel = get_option_log_level($options, "log_level_in");
2321
2322     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2323
2324     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2325     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2326     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2327
2328     # we use RETURN because we need to check also tap rules
2329     my $accept_action = 'RETURN';
2330
2331     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2332
2333     # add host rules first, so that cluster wide rules can be overwritten
2334     foreach my $rule (@$rules, @$cluster_rules) {
2335         next if !$rule->{enable} || $rule->{errors};
2336         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2337
2338         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2339
2340         eval {
2341             if ($rule->{type} eq 'group') {
2342                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2343             } elsif ($rule->{type} eq 'in') {
2344                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2345                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2346                                       undef, $cluster_conf, $hostfw_conf);
2347             }
2348         };
2349         warn $@ if $@;
2350         delete $rule->{iface_in};
2351     }
2352
2353     # allow standard traffic for management ipset (includes cluster network)
2354     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2355     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2356     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2357     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2358     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2359     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2360
2361     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2362     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2363
2364     # corosync
2365     if ($localnet && ($ipversion == $localnet_ver)) {
2366         my $corosync_rule = "-p udp --dport 5404:5405";
2367         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2368         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2369     }
2370
2371     # implement input policy
2372     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2373     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2374
2375     # host outbound firewall
2376     $chain = "PVEFW-HOST-OUT";
2377     ruleset_create_chain($ruleset, $chain);
2378
2379     $loglevel = get_option_log_level($options, "log_level_out");
2380
2381     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2382
2383     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2384
2385     # we use RETURN because we may want to check other thigs later
2386     $accept_action = 'RETURN';
2387     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2388
2389     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2390
2391     # add host rules first, so that cluster wide rules can be overwritten
2392     foreach my $rule (@$rules, @$cluster_rules) {
2393         next if !$rule->{enable} || $rule->{errors};
2394         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2395
2396         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2397         eval {
2398             if ($rule->{type} eq 'group') {
2399                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2400             } elsif ($rule->{type} eq 'out') {
2401                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2402                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2403                                       undef, $cluster_conf, $hostfw_conf);
2404             }
2405         };
2406         warn $@ if $@;
2407         delete $rule->{iface_out};
2408     }
2409
2410     # allow standard traffic on cluster network
2411     if ($localnet && ($ipversion == $localnet_ver)) {
2412         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2413         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2414         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2415         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2416
2417         my $corosync_rule = "-p udp --dport 5404:5405";
2418         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2419         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2420     }
2421
2422     # implement output policy
2423     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2424     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2425
2426     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2427     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2428 }
2429
2430 sub generate_group_rules {
2431     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2432
2433     my $rules = $cluster_conf->{groups}->{$group};
2434
2435     if (!$rules) {
2436         warn "no such security group '$group'\n";
2437         $rules = []; # create empty chain
2438     }
2439
2440     my $chain = "GROUP-${group}-IN";
2441
2442     ruleset_create_chain($ruleset, $chain);
2443     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2444
2445     foreach my $rule (@$rules) {
2446         next if $rule->{type} ne 'in';
2447         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2448         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2449                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2450                               undef, $cluster_conf);
2451     }
2452
2453     $chain = "GROUP-${group}-OUT";
2454
2455     ruleset_create_chain($ruleset, $chain);
2456     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2457
2458     foreach my $rule (@$rules) {
2459         next if $rule->{type} ne 'out';
2460         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2461         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2462         # check also other tap rules later
2463         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2464                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2465                               undef, $cluster_conf);
2466     }
2467 }
2468
2469 my $MAX_NETS = 32;
2470 my $valid_netdev_names = {};
2471 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2472     $valid_netdev_names->{"net$i"} = 1;
2473 }
2474
2475 sub get_mark_values {
2476     my ($value, $mask) = @_;
2477     $value = hex($value) if $value =~ /^0x/;
2478     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2479     $mask = 0xffffffff if !defined($mask);
2480     return ($value, $mask);
2481 }
2482
2483 sub parse_fw_rule {
2484     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2485
2486     my $orig_line = $line;
2487
2488     my $rule = {};
2489
2490     # we can add single line comments to the end of the rule
2491     if ($line =~ s/#\s*(.*?)\s*$//) {
2492         $rule->{comment} = decode('utf8', $1);
2493     }
2494
2495     # we can disable a rule when prefixed with '|'
2496
2497     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2498
2499     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2500         die "unable to parse rule: $line\n";
2501
2502     $rule->{type} = lc($1);
2503     $rule->{action} = $2;
2504
2505     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2506         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2507             $rule->{macro} = $1;
2508             $rule->{action} = $2;
2509         }
2510     }
2511
2512     while (length($line)) {
2513         if ($line =~ s/^-i (\S+)\s*//) {
2514             $rule->{iface} = $1;
2515             next;
2516         }
2517
2518         last if $rule->{type} eq 'group';
2519
2520         if ($line =~ s/^-p (\S+)\s*//) {
2521             $rule->{proto} = $1;
2522             next;
2523         }
2524
2525         if ($line =~ s/^-dport (\S+)\s*//) {
2526             $rule->{dport} = $1;
2527             next;
2528         }
2529
2530         if ($line =~ s/^-sport (\S+)\s*//) {
2531             $rule->{sport} = $1;
2532             next;
2533         }
2534         if ($line =~ s/^-source (\S+)\s*//) {
2535             $rule->{source} = $1;
2536             next;
2537         }
2538         if ($line =~ s/^-dest (\S+)\s*//) {
2539             $rule->{dest} = $1;
2540             next;
2541         }
2542
2543         last;
2544     }
2545
2546     die "unable to parse rule parameters: $line\n" if length($line);
2547
2548     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2549     if ($rule->{errors}) {
2550         # The verbose flag really means we're running from the CLI and want
2551         # output on the console - in the other case we really want such errors
2552         # to go into the syslog instead.
2553         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2554         $log->("$prefix - errors in rule parameters: $orig_line\n");
2555         foreach my $p (keys %{$rule->{errors}}) {
2556             $log->("  $p: $rule->{errors}->{$p}\n");
2557         }
2558     }
2559
2560     return $rule;
2561 }
2562
2563 sub parse_vmfw_option {
2564     my ($line) = @_;
2565
2566     my ($opt, $value);
2567
2568     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2569
2570     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2571         $opt = lc($1);
2572         $value = int($2);
2573     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2574         $opt = lc($1);
2575         $value = $2 ? lc($3) : '';
2576     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2577         $opt = lc($1);
2578         $value = uc($3);
2579     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2580         $opt = lc($1);
2581         $value = $2;
2582     } else {
2583         die "can't parse option '$line'\n"
2584     }
2585
2586     return ($opt, $value);
2587 }
2588
2589 sub parse_hostfw_option {
2590     my ($line) = @_;
2591
2592     my ($opt, $value);
2593
2594     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2595
2596     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2597         $opt = lc($1);
2598         $value = int($2);
2599     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2600         $opt = lc($1);
2601         $value = $2 ? lc($3) : '';
2602     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2603         $opt = lc($1);
2604         $value = int($2);
2605     } else {
2606         die "can't parse option '$line'\n"
2607     }
2608
2609     return ($opt, $value);
2610 }
2611
2612 sub parse_clusterfw_option {
2613     my ($line) = @_;
2614
2615     my ($opt, $value);
2616
2617     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2618         $opt = lc($1);
2619         $value = int($2);
2620         if (($value > 1) && ((time() - $value) > 60)) {
2621             $value = 0
2622         }
2623     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2624         $opt = lc($1);
2625         $value = uc($3);
2626     } else {
2627         die "can't parse option '$line'\n"
2628     }
2629
2630     return ($opt, $value);
2631 }
2632
2633 sub resolve_alias {
2634     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2635
2636     my $alias = lc($cidr);
2637     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2638     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2639
2640     die "no such alias '$cidr'\n" if !$e;;
2641
2642     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2643 }
2644
2645 sub parse_ip_or_cidr {
2646     my ($cidr) = @_;
2647
2648     my $ipversion;
2649
2650     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2651         $cidr =~ s|/128$||;
2652         $ipversion = 6;
2653     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2654         $cidr =~ s|/32$||;
2655         $ipversion = 4;
2656     } else {
2657         die "value does not look like a valid IP address or CIDR network\n";
2658     }
2659
2660     return wantarray ? ($cidr, $ipversion) : $cidr;
2661 }
2662
2663 sub parse_alias {
2664     my ($line) = @_;
2665
2666     # we can add single line comments to the end of the line
2667     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2668
2669     if ($line =~ m/^(\S+)\s(\S+)$/) {
2670         my ($name, $cidr) = ($1, $2);
2671         my $ipversion;
2672
2673         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2674
2675         my $data = {
2676             name => $name,
2677             cidr => $cidr,
2678             ipversion => $ipversion,
2679         };
2680         $data->{comment} = $comment  if $comment;
2681         return $data;
2682     }
2683
2684     return undef;
2685 }
2686
2687 sub generic_fw_config_parser {
2688     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2689
2690     my $section;
2691     my $group;
2692
2693     my $res = $empty_conf;
2694
2695     while (defined(my $line = <$fh>)) {
2696         next if $line =~ m/^#/;
2697         next if $line =~ m/^\s*$/;
2698
2699         chomp $line;
2700
2701         my $linenr = $fh->input_line_number();
2702         my $prefix = "$filename (line $linenr)";
2703
2704         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2705             $section = 'options';
2706             next;
2707         }
2708
2709         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2710             $section = 'aliases';
2711             next;
2712         }
2713
2714         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2715             $section = 'groups';
2716             $group = lc($1);
2717             my $comment = $2;
2718             eval {
2719                 die "security group name too long\n" if length($group) > $max_group_name_length;
2720                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2721             };
2722             if (my $err = $@) {
2723                 ($section, $group, $comment) = undef;
2724                 warn "$prefix: $err";
2725                 next;
2726             }
2727
2728             $res->{$section}->{$group} = [];
2729             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2730                 if $comment;
2731             next;
2732         }
2733
2734         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2735             $section = 'rules';
2736             next;
2737         }
2738
2739         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2740             $section = 'ipset';
2741             $group = lc($1);
2742             my $comment = $2;
2743             eval {
2744                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2745                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2746             };
2747             if (my $err = $@) {
2748                 ($section, $group, $comment) = undef;
2749                 warn "$prefix: $err";
2750                 next;
2751             }
2752
2753             $res->{$section}->{$group} = [];
2754             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2755                 if $comment;
2756             next;
2757         }
2758
2759         if (!$section) {
2760             warn "$prefix: skip line - no section\n";
2761             next;
2762         }
2763
2764         if ($section eq 'options') {
2765             eval {
2766                 my ($opt, $value);
2767                 if ($rule_env eq 'cluster') {
2768                     ($opt, $value) = parse_clusterfw_option($line);
2769                 } elsif ($rule_env eq 'host') {
2770                     ($opt, $value) = parse_hostfw_option($line);
2771                 } else {
2772                     ($opt, $value) = parse_vmfw_option($line);
2773                 }
2774                 $res->{options}->{$opt} = $value;
2775             };
2776             warn "$prefix: $@" if $@;
2777         } elsif ($section eq 'aliases') {
2778             eval {
2779                 my $data = parse_alias($line);
2780                 $res->{aliases}->{lc($data->{name})} = $data;
2781             };
2782             warn "$prefix: $@" if $@;
2783         } elsif ($section eq 'rules') {
2784             my $rule;
2785             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2786             if (my $err = $@) {
2787                 warn "$prefix: $err";
2788                 next;
2789             }
2790             push @{$res->{$section}}, $rule;
2791         } elsif ($section eq 'groups') {
2792             my $rule;
2793             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2794             if (my $err = $@) {
2795                 warn "$prefix: $err";
2796                 next;
2797             }
2798             push @{$res->{$section}->{$group}}, $rule;
2799         } elsif ($section eq 'ipset') {
2800             # we can add single line comments to the end of the rule
2801             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2802
2803             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2804             my $nomatch = $1;
2805             my $cidr = $2;
2806             my $errors;
2807
2808             if ($nomatch && !$feature_ipset_nomatch) {
2809                 $errors->{nomatch} = "nomatch not supported by kernel";
2810             }
2811
2812             eval {
2813                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2814                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2815                 } else {
2816                     $cidr = parse_ip_or_cidr($cidr);
2817                 }
2818             };
2819             if (my $err = $@) {
2820                 chomp $err;
2821                 $errors->{cidr} = $err;
2822             }
2823
2824             if ($cidr =~ m!/0+$!) {
2825                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2826             }
2827
2828             my $entry = { cidr => $cidr };
2829             $entry->{nomatch} = 1 if $nomatch;
2830             $entry->{comment} = $comment if $comment;
2831             $entry->{errors} =  $errors if $errors;
2832
2833             if ($verbose && $errors) {
2834                 warn "$prefix - errors in ipset '$group': $line\n";
2835                 foreach my $p (keys %{$errors}) {
2836                     warn "  $p: $errors->{$p}\n";
2837                 }
2838             }
2839
2840             push @{$res->{$section}->{$group}}, $entry;
2841         } else {
2842             warn "$prefix: skip line - unknown section\n";
2843             next;
2844         }
2845     }
2846
2847     return $res;
2848 }
2849
2850 sub parse_hostfw_config {
2851     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2852
2853     my $empty_conf = { rules => [], options => {}};
2854
2855     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2856 }
2857
2858 sub parse_vmfw_config {
2859     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2860
2861     my $empty_conf = {
2862         rules => [],
2863         options => {},
2864         aliases => {},
2865         ipset => {} ,
2866         ipset_comments => {},
2867     };
2868
2869     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2870 }
2871
2872 sub parse_clusterfw_config {
2873     my ($filename, $fh, $verbose) = @_;
2874
2875     my $section;
2876     my $group;
2877
2878     my $empty_conf = {
2879         rules => [],
2880         options => {},
2881         aliases => {},
2882         groups => {},
2883         group_comments => {},
2884         ipset => {} ,
2885         ipset_comments => {},
2886     };
2887
2888     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2889 }
2890
2891 sub run_locked {
2892     my ($code, @param) = @_;
2893
2894     my $timeout = 10;
2895
2896     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2897
2898     die $@ if $@;
2899
2900     return $res;
2901 }
2902
2903 sub read_local_vm_config {
2904
2905     my $qemu = {};
2906     my $lxc = {};
2907
2908     my $vmdata = { qemu => $qemu, lxc => $lxc };
2909
2910     my $vmlist = PVE::Cluster::get_vmlist();
2911     return $vmdata if !$vmlist || !$vmlist->{ids};
2912     my $ids = $vmlist->{ids};
2913
2914     foreach my $vmid (keys %$ids) {
2915         next if !$vmid; # skip VE0
2916         my $d = $ids->{$vmid};
2917         next if !$d->{node} || $d->{node} ne $nodename;
2918         next if !$d->{type};
2919         if ($d->{type} eq 'qemu') {
2920             if ($have_qemu_server) {
2921                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2922                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2923                     $qemu->{$vmid} = $conf;
2924                 }
2925             }
2926         } elsif ($d->{type} eq 'lxc') {
2927             if ($have_lxc) {
2928                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2929                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2930                     $lxc->{$vmid} = $conf;
2931                 }
2932             }
2933         }
2934     }
2935
2936     return $vmdata;
2937 };
2938
2939 sub load_vmfw_conf {
2940     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2941
2942     my $vmfw_conf = {};
2943
2944     $dir = $pvefw_conf_dir if !defined($dir);
2945
2946     my $filename = "$dir/$vmid.fw";
2947     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2948         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2949         $vmfw_conf->{vmid} = $vmid;
2950     }
2951
2952     return $vmfw_conf;
2953 }
2954
2955 my $format_rules = sub {
2956     my ($rules, $allow_iface) = @_;
2957
2958     my $raw = '';
2959
2960     foreach my $rule (@$rules) {
2961         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2962             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2963             $raw .= uc($rule->{type});
2964             if ($rule->{macro}) {
2965                 $raw .= " $rule->{macro}($rule->{action})";
2966             } else {
2967                 $raw .= " " . $rule->{action};
2968             }
2969             if ($allow_iface && $rule->{iface}) {
2970                 $raw .= " -i $rule->{iface}";
2971             }
2972
2973             if ($rule->{type} ne  'group')  {
2974                 $raw .= " -source $rule->{source}" if $rule->{source};
2975                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2976                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2977                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2978                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2979             }
2980
2981             $raw .= " # " . encode('utf8', $rule->{comment})
2982                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2983             $raw .= "\n";
2984         } else {
2985             die "unknown rule type '$rule->{type}'";
2986         }
2987     }
2988
2989     return $raw;
2990 };
2991
2992 my $format_options = sub {
2993     my ($options) = @_;
2994
2995     my $raw = '';
2996
2997     $raw .= "[OPTIONS]\n\n";
2998     foreach my $opt (keys %$options) {
2999         $raw .= "$opt: $options->{$opt}\n";
3000     }
3001     $raw .= "\n";
3002
3003     return $raw;
3004 };
3005
3006 my $format_aliases = sub {
3007     my ($aliases) = @_;
3008
3009     my $raw = '';
3010
3011     $raw .= "[ALIASES]\n\n";
3012     foreach my $k (keys %$aliases) {
3013         my $e = $aliases->{$k};
3014         $raw .= "$e->{name} $e->{cidr}";
3015         $raw .= " # " . encode('utf8', $e->{comment})
3016             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3017         $raw .= "\n";
3018     }
3019     $raw .= "\n";
3020
3021     return $raw;
3022 };
3023
3024 my $format_ipsets = sub {
3025     my ($fw_conf) = @_;
3026
3027     my $raw = '';
3028
3029     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3030         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3031             my $utf8comment = encode('utf8', $comment);
3032             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3033         } else {
3034             $raw .= "[IPSET $ipset]\n\n";
3035         }
3036         my $options = $fw_conf->{ipset}->{$ipset};
3037
3038         my $nethash = {};
3039         foreach my $entry (@$options) {
3040             $nethash->{$entry->{cidr}} = $entry;
3041         }
3042
3043         foreach my $cidr (sort keys %$nethash) {
3044             my $entry = $nethash->{$cidr};
3045             my $line = $entry->{nomatch} ? '!' : '';
3046             $line .= $entry->{cidr};
3047             $line .= " # " . encode('utf8', $entry->{comment})
3048                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3049             $raw .= "$line\n";
3050         }
3051
3052         $raw .= "\n";
3053     }
3054
3055     return $raw;
3056 };
3057
3058 sub save_vmfw_conf {
3059     my ($vmid, $vmfw_conf) = @_;
3060
3061     my $raw = '';
3062
3063     my $options = $vmfw_conf->{options};
3064     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3065
3066     my $aliases = $vmfw_conf->{aliases};
3067     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3068
3069     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3070
3071     my $rules = $vmfw_conf->{rules} || [];
3072     if ($rules && scalar(@$rules)) {
3073         $raw .= "[RULES]\n\n";
3074         $raw .= &$format_rules($rules, 1);
3075         $raw .= "\n";
3076     }
3077
3078     my $filename = "$pvefw_conf_dir/$vmid.fw";
3079     if ($raw) {
3080         mkdir $pvefw_conf_dir;
3081         PVE::Tools::file_set_contents($filename, $raw);
3082     } else {
3083         unlink $filename;
3084     }
3085 }
3086
3087 sub remove_vmfw_conf {
3088     my ($vmid) = @_;
3089
3090     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3091
3092     unlink $vmfw_conffile;
3093 }
3094
3095 sub clone_vmfw_conf {
3096     my ($vmid, $newid) = @_;
3097
3098     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3099     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3100
3101     if (-f $clonevm_conffile) {
3102         unlink $clonevm_conffile;
3103     }
3104     if (-f $sourcevm_conffile) {
3105         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3106         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3107     }
3108 }
3109
3110 sub read_vm_firewall_configs {
3111     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3112
3113     my $vmfw_configs = {};
3114
3115     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3116         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3117         next if !$vmfw_conf->{options}; # skip if file does not exists
3118         $vmfw_configs->{$vmid} = $vmfw_conf;
3119     }
3120     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3121         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3122         next if !$vmfw_conf->{options}; # skip if file does not exists
3123         $vmfw_configs->{$vmid} = $vmfw_conf;
3124     }
3125
3126     return $vmfw_configs;
3127 }
3128
3129 sub get_option_log_level {
3130     my ($options, $k) = @_;
3131
3132     my $v = $options->{$k};
3133     $v = $default_log_level if !defined($v);
3134
3135     return undef if $v eq '' || $v eq 'nolog';
3136
3137     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3138
3139     return $v if ($v >= 0) && ($v <= 7);
3140
3141     warn "unknown log level ($k = '$v')\n";
3142
3143     return undef;
3144 }
3145
3146 sub generate_std_chains {
3147     my ($ruleset, $options, $ipversion) = @_;
3148
3149     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3150
3151     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3152     my $chain = 'PVEFW-smurflog';
3153     if ( $std_chains->{$chain} ) {
3154         foreach my $r (@{$std_chains->{$chain}}) {
3155           $r->{log} = $loglevel;
3156         }
3157     }
3158
3159     # same as shorewall logflags action.
3160     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3161     $chain = 'PVEFW-logflags';
3162     if ( $std_chains->{$chain} ) {
3163         foreach my $r (@{$std_chains->{$chain}}) {
3164           $r->{log} = $loglevel;
3165         }
3166     }
3167
3168     foreach my $chain (keys %$std_chains) {
3169         ruleset_create_chain($ruleset, $chain);
3170         foreach my $rule (@{$std_chains->{$chain}}) {
3171             if (ref($rule)) {
3172                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3173             } else {
3174                 die "rule $rule as string - should not happen";
3175             }
3176         }
3177     }
3178 }
3179
3180 sub generate_ipset_chains {
3181     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3182
3183     foreach my $ipset (keys %{$ipsets}) {
3184
3185         my $options = $ipsets->{$ipset};
3186
3187         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3188             if (my $ips = $device_ips->{$1}) {
3189                 $options = [@$options, @$ips];
3190             }
3191         }
3192
3193         # remove duplicates
3194         my $nethash = {};
3195         foreach my $entry (@$options) {
3196             next if $entry->{errors}; # skip entries with errors
3197             eval {
3198                 my ($cidr, $ver);
3199                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3200                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3201                 } else {
3202                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3203                 }
3204                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3205                 if ($ver == 6) {
3206                     # ip_compress_address takes an address only, no CIDR
3207                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3208                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3209                     $cidr .= $prefix_len if defined($prefix_len);
3210                     $cidr =~ s|/128$||;
3211                 } else {
3212                     $cidr =~ s|/32$||;
3213                 }
3214
3215                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3216             };
3217             warn $@ if $@;
3218         }
3219
3220         foreach my $ipversion (4, 6) {
3221             my $data = $nethash->{$ipversion};
3222
3223             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3224
3225             my $hashsize = scalar(@$options);
3226             if ($hashsize <= 64) {
3227                 $hashsize = 64;
3228             } else {
3229                 $hashsize = round_powerof2($hashsize);
3230             }
3231
3232             my $family = $ipversion == "6" ? "inet6" : "inet";
3233
3234             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3235
3236             foreach my $cidr (sort keys %$data) {
3237                 my $entry = $data->{$cidr};
3238
3239                 my $cmd = "add $name $cidr";
3240                 if ($entry->{nomatch}) {
3241                     if ($feature_ipset_nomatch) {
3242                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3243                     } else {
3244                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3245                     }
3246                 } else {
3247                     push @{$ipset_ruleset->{$name}}, $cmd;
3248                 }
3249             }
3250         }
3251     }
3252 }
3253
3254 sub round_powerof2 {
3255     my ($int) = @_;
3256
3257     $int--;
3258     $int |= $int >> $_ foreach (1,2,4,8,16);
3259     return ++$int;
3260 }
3261
3262 sub load_clusterfw_conf {
3263     my ($filename, $verbose) = @_;
3264
3265     $filename = $clusterfw_conf_filename if !defined($filename);
3266
3267     my $cluster_conf = {};
3268     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3269         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3270     }
3271
3272     return $cluster_conf;
3273 }
3274
3275 sub save_clusterfw_conf {
3276     my ($cluster_conf) = @_;
3277
3278     my $raw = '';
3279
3280     my $options = $cluster_conf->{options};
3281     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3282
3283     my $aliases = $cluster_conf->{aliases};
3284     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3285
3286     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3287
3288     my $rules = $cluster_conf->{rules};
3289     if ($rules && scalar(@$rules)) {
3290         $raw .= "[RULES]\n\n";
3291         $raw .= &$format_rules($rules, 1);
3292         $raw .= "\n";
3293     }
3294
3295     if ($cluster_conf->{groups}) {
3296         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3297             my $rules = $cluster_conf->{groups}->{$group};
3298             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3299                 my $utf8comment = encode('utf8', $comment);
3300                 $raw .= "[group $group] # $utf8comment\n\n";
3301             } else {
3302                 $raw .= "[group $group]\n\n";
3303             }
3304
3305             $raw .= &$format_rules($rules, 0);
3306             $raw .= "\n";
3307         }
3308     }
3309
3310     if ($raw) {
3311         mkdir $pvefw_conf_dir;
3312         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3313     } else {
3314         unlink $clusterfw_conf_filename;
3315     }
3316 }
3317
3318 sub load_hostfw_conf {
3319     my ($cluster_conf, $filename, $verbose) = @_;
3320
3321     $filename = $hostfw_conf_filename if !defined($filename);
3322
3323     my $hostfw_conf = {};
3324     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3325         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3326     }
3327     return $hostfw_conf;
3328 }
3329
3330 sub save_hostfw_conf {
3331     my ($hostfw_conf) = @_;
3332
3333     my $raw = '';
3334
3335     my $options = $hostfw_conf->{options};
3336     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3337
3338     my $rules = $hostfw_conf->{rules};
3339     if ($rules && scalar(@$rules)) {
3340         $raw .= "[RULES]\n\n";
3341         $raw .= &$format_rules($rules, 1);
3342         $raw .= "\n";
3343     }
3344
3345     if ($raw) {
3346         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3347     } else {
3348         unlink $hostfw_conf_filename;
3349     }
3350 }
3351
3352 sub compile {
3353     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3354
3355     my $vmfw_configs;
3356
3357     if ($vmdata) { # test mode
3358         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3359         my $filename = "$testdir/cluster.fw";
3360         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3361
3362         $filename = "$testdir/host.fw";
3363         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3364
3365         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3366     } else { # normal operation
3367         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3368
3369         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3370
3371         $vmdata = read_local_vm_config();
3372         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3373     }
3374
3375     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3376
3377     my $localnet;
3378     if ($cluster_conf->{aliases}->{local_network}) {
3379         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3380     } else {
3381         my $localnet_ver;
3382         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3383
3384         $cluster_conf->{aliases}->{local_network} = {
3385             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3386     }
3387
3388     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3389
3390     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3391     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3392     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3393
3394     return ($ruleset, $ipset_ruleset, $rulesetv6);
3395 }
3396
3397 sub compile_iptables_filter {
3398     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3399
3400     my $ruleset = {};
3401
3402     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3403     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3404
3405     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3406
3407     my $hostfw_options = $hostfw_conf->{options} || {};
3408
3409     # fixme: what log level should we use here?
3410     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3411
3412     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3413
3414     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3415     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3416
3417     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3418
3419     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3420     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3421
3422     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3423
3424     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3425
3426     if ($hostfw_enable) {
3427         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3428         warn $@ if $@; # just to be sure - should not happen
3429     }
3430
3431     # generate firewall rules for QEMU VMs
3432     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3433         eval {
3434             my $conf = $vmdata->{qemu}->{$vmid};
3435             my $vmfw_conf = $vmfw_configs->{$vmid};
3436             return if !$vmfw_conf;
3437
3438             foreach my $netid (sort keys %$conf) {
3439                 next if $netid !~ m/^net(\d+)$/;
3440                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3441                 next if !$net->{firewall};
3442                 my $iface = "tap${vmid}i$1";
3443
3444                 my $macaddr = $net->{macaddr};
3445                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3446                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3447                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3448                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3449             }
3450         };
3451         warn $@ if $@; # just to be sure - should not happen
3452     }
3453
3454     # generate firewall rules for LXC containers
3455     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3456         eval {
3457             my $conf = $vmdata->{lxc}->{$vmid};
3458             my $vmfw_conf = $vmfw_configs->{$vmid};
3459             return if !$vmfw_conf;
3460
3461             if ($vmfw_conf->{options}->{enable}) {
3462                 foreach my $netid (sort keys %$conf) {
3463                     next if $netid !~ m/^net(\d+)$/;
3464                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3465                     next if !$net->{firewall};
3466                     my $iface = "veth${vmid}i$1";
3467                     my $macaddr = $net->{hwaddr};
3468                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3469                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3470                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3471                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3472                 }
3473             }
3474         };
3475         warn $@ if $@; # just to be sure - should not happen
3476     }
3477
3478     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3479         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3480     }
3481
3482     return $ruleset;
3483 }
3484
3485 sub mac_to_linklocal {
3486     my ($macaddr) = @_;
3487     my @parts = split(/:/, $macaddr);
3488     # The standard link local address uses the fe80::/64 prefix with the
3489     # modified EUI-64 identifier derived from the MAC address by flipping the
3490     # universal/local bit and inserting FF:FE in the middle.
3491     # See RFC 4291.
3492     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3493     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3494     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3495 }
3496
3497 sub compile_ipsets {
3498     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3499
3500     my $localnet;
3501     if ($cluster_conf->{aliases}->{local_network}) {
3502         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3503     } else {
3504         my $localnet_ver;
3505         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3506
3507         $cluster_conf->{aliases}->{local_network} = {
3508             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3509     }
3510
3511     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3512
3513
3514     my $ipset_ruleset = {};
3515
3516     # generate ipsets for QEMU VMs
3517     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3518         eval {
3519             my $conf = $vmdata->{qemu}->{$vmid};
3520             my $vmfw_conf = $vmfw_configs->{$vmid};
3521             return if !$vmfw_conf;
3522
3523             # When the 'ipfilter' option is enabled every device for which there
3524             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3525             # ipset.
3526             # The reason is that ipfilter ipsets are always filled with standard
3527             # IPv6 link-local filters.
3528             my $ipsets = $vmfw_conf->{ipset};
3529             my $implicit_sets = {};
3530
3531             my $device_ips = {};
3532             foreach my $netid (keys %$conf) {
3533                 next if $netid !~ m/^net(\d+)$/;
3534                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3535                 next if !$net->{firewall};
3536
3537                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3538                     $implicit_sets->{"ipfilter-$netid"} = [];
3539                 }
3540
3541                 my $macaddr = $net->{macaddr};
3542                 my $linklocal = mac_to_linklocal($macaddr);
3543                 $device_ips->{$netid} = [
3544                     { cidr => $linklocal },
3545                     { cidr => 'fe80::/10', nomatch => 1 }
3546                 ];
3547             }
3548
3549             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3550             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3551         };
3552         warn $@ if $@; # just to be sure - should not happen
3553     }
3554
3555     # generate firewall rules for LXC containers
3556     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3557         eval {
3558             my $conf = $vmdata->{lxc}->{$vmid};
3559             my $vmfw_conf = $vmfw_configs->{$vmid};
3560             return if !$vmfw_conf;
3561
3562             # When the 'ipfilter' option is enabled every device for which there
3563             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3564             # ipset.
3565             # The reason is that ipfilter ipsets are always filled with standard
3566             # IPv6 link-local filters, as well as the IP addresses configured
3567             # for the container.
3568             my $ipsets = $vmfw_conf->{ipset};
3569             my $implicit_sets = {};
3570
3571             my $device_ips = {};
3572             foreach my $netid (keys %$conf) {
3573                 next if $netid !~ m/^net(\d+)$/;
3574                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3575                 next if !$net->{firewall};
3576
3577                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3578                     $implicit_sets->{"ipfilter-$netid"} = [];
3579                 }
3580
3581                 my $macaddr = $net->{hwaddr};
3582                 my $linklocal = mac_to_linklocal($macaddr);
3583                 my $set = $device_ips->{$netid} = [
3584                     { cidr => $linklocal },
3585                     { cidr => 'fe80::/10', nomatch => 1 }
3586                 ];
3587                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3588                     push @$set, { cidr => $1 };
3589                 }
3590                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3591                     push @$set, { cidr => $1 };
3592                 }
3593             }
3594
3595             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3596             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3597         };
3598         warn $@ if $@; # just to be sure - should not happen
3599     }
3600
3601     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3602
3603     return $ipset_ruleset;
3604 }
3605
3606 sub get_ruleset_status {
3607     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3608
3609     my $statushash = {};
3610
3611     foreach my $chain (sort keys %$ruleset) {
3612         my $sig = &$digest_fn($ruleset->{$chain});
3613
3614         $statushash->{$chain}->{sig} = $sig;
3615
3616         my $oldsig = $active_chains->{$chain};
3617         if (!defined($oldsig)) {
3618             $statushash->{$chain}->{action} = 'create';
3619         } else {
3620             if ($oldsig eq $sig) {
3621                 $statushash->{$chain}->{action} = 'exists';
3622             } else {
3623                 $statushash->{$chain}->{action} = 'update';
3624             }
3625         }
3626         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3627         foreach my $cmd (@{$ruleset->{$chain}}) {
3628             print "\t$cmd\n" if $verbose;
3629         }
3630     }
3631
3632     foreach my $chain (sort keys %$active_chains) {
3633         if (!defined($ruleset->{$chain})) {
3634             my $sig = $active_chains->{$chain};
3635             $statushash->{$chain}->{action} = 'delete';
3636             $statushash->{$chain}->{sig} = $sig;
3637             print "delete $chain ($sig)\n" if $verbose;
3638         }
3639     }
3640
3641     return $statushash;
3642 }
3643
3644 sub print_sig_rule {
3645     my ($chain, $sig) = @_;
3646
3647     # We just use this to store a SHA1 checksum used to detect changes
3648     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3649 }
3650
3651 sub get_ruleset_cmdlist {
3652     my ($ruleset, $verbose, $iptablescmd) = @_;
3653
3654     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3655
3656     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3657     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3658
3659     # create missing chains first
3660     foreach my $chain (sort keys %$ruleset) {
3661         my $stat = $statushash->{$chain};
3662         die "internal error" if !$stat;
3663         next if $stat->{action} ne 'create';
3664
3665         $cmdlist .= ":$chain - [0:0]\n";
3666     }
3667
3668     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3669         my $chain = "PVEFW-$h";
3670         if ($ruleset->{$chain} && !$hooks->{$h}) {
3671             $cmdlist .= "-A $h -j $chain\n";
3672         }
3673     }
3674
3675     foreach my $chain (sort keys %$ruleset) {
3676         my $stat = $statushash->{$chain};
3677         die "internal error" if !$stat;
3678
3679         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3680             $cmdlist .= "-F $chain\n";
3681             foreach my $cmd (@{$ruleset->{$chain}}) {
3682                 $cmdlist .= "$cmd\n";
3683             }
3684             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3685         } elsif ($stat->{action} eq 'delete') {
3686             die "internal error"; # this should not happen
3687         } elsif ($stat->{action} eq 'exists') {
3688             # do nothing
3689         } else {
3690             die "internal error - unknown status '$stat->{action}'";
3691         }
3692     }
3693
3694     foreach my $chain (keys %$statushash) {
3695         next if $statushash->{$chain}->{action} ne 'delete';
3696         $cmdlist .= "-F $chain\n";
3697     }
3698     foreach my $chain (keys %$statushash) {
3699         next if $statushash->{$chain}->{action} ne 'delete';
3700         next if $chain eq 'PVEFW-INPUT';
3701         next if $chain eq 'PVEFW-OUTPUT';
3702         next if $chain eq 'PVEFW-FORWARD';
3703         $cmdlist .= "-X $chain\n";
3704     }
3705
3706     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3707
3708     $cmdlist .= "COMMIT\n";
3709
3710     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3711 }
3712
3713 sub get_ipset_cmdlist {
3714     my ($ruleset, $verbose) = @_;
3715
3716     my $cmdlist = "";
3717
3718     my $delete_cmdlist = "";
3719
3720     my $active_chains = ipset_get_chains();
3721     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3722
3723     # remove stale _swap chains
3724     foreach my $chain (keys %$active_chains) {
3725         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3726             $cmdlist .= "destroy $chain\n";
3727         }
3728     }
3729
3730     foreach my $chain (keys %$ruleset) {
3731         my $stat = $statushash->{$chain};
3732         die "internal error" if !$stat;
3733
3734         if ($stat->{action} eq 'create') {
3735             foreach my $cmd (@{$ruleset->{$chain}}) {
3736                 $cmdlist .= "$cmd\n";
3737             }
3738         }
3739     }
3740
3741     foreach my $chain (keys %$ruleset) {
3742         my $stat = $statushash->{$chain};
3743         die "internal error" if !$stat;
3744
3745         if ($stat->{action} eq 'update') {
3746             my $chain_swap = $chain."_swap";
3747
3748             foreach my $cmd (@{$ruleset->{$chain}}) {
3749                 $cmd =~ s/$chain/$chain_swap/;
3750                 $cmdlist .= "$cmd\n";
3751             }
3752             $cmdlist .= "swap $chain_swap $chain\n";
3753             $cmdlist .= "flush $chain_swap\n";
3754             $cmdlist .= "destroy $chain_swap\n";
3755         }
3756     }
3757
3758      # the remove unused chains
3759     foreach my $chain (keys %$statushash) {
3760         next if $statushash->{$chain}->{action} ne 'delete';
3761
3762         $delete_cmdlist .= "flush $chain\n";
3763         $delete_cmdlist .= "destroy $chain\n";
3764     }
3765
3766     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3767
3768     return ($cmdlist, $delete_cmdlist, $changes);
3769 }
3770
3771 sub apply_ruleset {
3772     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3773
3774     enable_bridge_firewall();
3775
3776     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3777         get_ipset_cmdlist($ipset_ruleset, $verbose);
3778
3779     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3780     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3781
3782     if ($verbose) {
3783         if ($ipset_changes) {
3784             print "ipset changes:\n";
3785             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3786             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3787         }
3788
3789         if ($changes) {
3790             print "iptables changes:\n";
3791             print $cmdlist;
3792         }
3793
3794         if ($changesv6) {
3795             print "ip6tables changes:\n";
3796             print $cmdlistv6;
3797         }
3798     }
3799
3800     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3801     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3802
3803     ipset_restore_cmdlist($ipset_create_cmdlist);
3804
3805     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3806     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3807
3808     iptables_restore_cmdlist($cmdlist);
3809
3810     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3811     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3812
3813     ip6tables_restore_cmdlist($cmdlistv6);
3814
3815     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3816     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3817
3818     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3819
3820     # test: re-read status and check if everything is up to date
3821     my $active_chains = iptables_get_chains();
3822     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3823
3824     my $errors;
3825     foreach my $chain (sort keys %$ruleset) {
3826         my $stat = $statushash->{$chain};
3827         if ($stat->{action} ne 'exists') {
3828             warn "unable to update chain '$chain'\n";
3829             $errors = 1;
3830         }
3831     }
3832
3833     my $active_chainsv6 = iptables_get_chains("ip6tables");
3834     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3835
3836     foreach my $chain (sort keys %$rulesetv6) {
3837         my $stat = $statushashv6->{$chain};
3838         if ($stat->{action} ne 'exists') {
3839             warn "unable to update chain '$chain'\n";
3840             $errors = 1;
3841         }
3842     }
3843
3844     die "unable to apply firewall changes\n" if $errors;
3845
3846     update_nf_conntrack_max($hostfw_conf);
3847
3848     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3849
3850 }
3851
3852 sub update_nf_conntrack_max {
3853     my ($hostfw_conf) = @_;
3854
3855     my $max = 65536; # reasonable default
3856
3857     my $options = $hostfw_conf->{options} || {};
3858
3859     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3860         $max = $options->{nf_conntrack_max};
3861         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3862     }
3863
3864     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3865     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3866
3867     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3868
3869     if ($current != $max) {
3870         my $hashsize = int($max/4);
3871         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3872         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3873     }
3874 }
3875
3876 sub update_nf_conntrack_tcp_timeout_established {
3877     my ($hostfw_conf) = @_;
3878
3879     my $options = $hostfw_conf->{options} || {};
3880
3881     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3882
3883     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3884 }
3885
3886 sub remove_pvefw_chains {
3887
3888     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3889     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3890     PVE::Firewall::remove_pvefw_chains_ipset();
3891
3892 }
3893
3894 sub remove_pvefw_chains_iptables {
3895     my ($iptablescmd) = @_;
3896
3897     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3898     my $cmdlist = "*filter\n";
3899
3900     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3901         if ($hooks->{$h}) {
3902             $cmdlist .= "-D $h -j PVEFW-$h\n";
3903         }
3904     }
3905
3906     foreach my $chain (keys %$chash) {
3907         $cmdlist .= "-F $chain\n";
3908     }
3909
3910     foreach my $chain (keys %$chash) {
3911         $cmdlist .= "-X $chain\n";
3912     }
3913     $cmdlist .= "COMMIT\n";
3914
3915     if($iptablescmd eq "ip6tables") {
3916         ip6tables_restore_cmdlist($cmdlist);
3917     } else {
3918         iptables_restore_cmdlist($cmdlist);
3919     }
3920 }
3921
3922 sub remove_pvefw_chains_ipset {
3923
3924     my $ipset_chains = ipset_get_chains();
3925
3926     my $cmdlist = "";
3927
3928     foreach my $chain (keys %$ipset_chains) {
3929         $cmdlist .= "flush $chain\n";
3930         $cmdlist .= "destroy $chain\n";
3931     }
3932
3933     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3934 }
3935
3936 sub init {
3937     my $cluster_conf = load_clusterfw_conf();
3938     my $cluster_options = $cluster_conf->{options};
3939     my $enable = $cluster_options->{enable};
3940
3941     return if !$enable;
3942
3943     # load required modules here
3944 }
3945
3946 sub update {
3947     my $code = sub {
3948
3949         my $cluster_conf = load_clusterfw_conf();
3950         my $cluster_options = $cluster_conf->{options};
3951
3952         if (!$cluster_options->{enable}) {
3953             PVE::Firewall::remove_pvefw_chains();
3954             return;
3955         }
3956
3957         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3958
3959         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3960
3961         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3962     };
3963
3964     run_locked($code);
3965 }
3966
3967 1;