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