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     my @elements = split(/,/, $str);
 980     die "extraneous commas in list\n" if $str ne join(',', @elements);
 981     foreach my $elem (@elements) {
 982         $count++;
 983         my $ip = Net::IP->new($elem);
 984         if (!$ip) {
 985             my $err = Net::IP::Error();
 986             die "invalid IP address: $err\n";
 987         }
 988         $iprange = 1 if $elem =~ m/-/;
 989
 990         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 991
 992         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 993             if $ipversion && ($new_ipversion != $ipversion);
 994
 995         $ipversion = $new_ipversion;
 996     }
 997
 998     die "you can't use a range in a list\n" if $iprange && $count > 1;
 999
1000     return $ipversion;
1001 }
1002
1003 sub parse_port_name_number_or_range {
1004     my ($str, $dport) = @_;
1005
1006     my $services = PVE::Firewall::get_etc_services();
1007     my $count = 0;
1008     my $icmp_port = 0;
1009
1010     my @elements = split(/,/, $str);
1011     die "extraneous commas in list\n" if $str ne join(',', @elements);
1012     foreach my $item (@elements) {
1013         $count++;
1014         if ($item =~ m/^(\d+):(\d+)$/) {
1015             my ($port1, $port2) = ($1, $2);
1016             die "invalid port '$port1'\n" if $port1 > 65535;
1017             die "invalid port '$port2'\n" if $port2 > 65535;
1018         } elsif ($item =~ m/^(\d+)$/) {
1019             my $port = $1;
1020             die "invalid port '$port'\n" if $port > 65535;
1021         } else {
1022             if ($dport && $icmp_type_names->{$item}) {
1023                 $icmp_port = 1;
1024             } elsif ($dport && $icmpv6_type_names->{$item}) {
1025                 $icmp_port = 1;
1026             } else {
1027                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1028             }
1029         }
1030     }
1031
1032     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1033
1034     return $count;
1035 }
1036
1037 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1038 sub pve_fw_verify_sport_spec {
1039    my ($portstr) = @_;
1040
1041    parse_port_name_number_or_range($portstr, 0);
1042
1043    return $portstr;
1044 }
1045
1046 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1047 sub pve_fw_verify_dport_spec {
1048    my ($portstr) = @_;
1049
1050    parse_port_name_number_or_range($portstr, 1);
1051
1052    return $portstr;
1053 }
1054
1055 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1056 sub pve_fw_verify_addr_spec {
1057    my ($list) = @_;
1058
1059    parse_address_list($list);
1060
1061    return $list;
1062 }
1063
1064 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1065 sub pve_fw_verify_protocol_spec {
1066    my ($proto) = @_;
1067
1068    my $protocols = get_etc_protocols();
1069
1070    die "unknown protocol '$proto'\n" if $proto &&
1071        !(defined($protocols->{byname}->{$proto}) ||
1072          defined($protocols->{byid}->{$proto}));
1073
1074    return $proto;
1075 }
1076
1077
1078 # helper function for API
1079
1080 sub copy_opject_with_digest {
1081     my ($object) = @_;
1082
1083     my $sha = Digest::SHA->new('sha1');
1084
1085     my $res = {};
1086     foreach my $k (sort keys %$object) {
1087         my $v = $object->{$k};
1088         next if !defined($v);
1089         $res->{$k} = $v;
1090         $sha->add($k, ':', $v, "\n");
1091     }
1092
1093     my $digest = $sha->hexdigest;
1094
1095     $res->{digest} = $digest;
1096
1097     return wantarray ? ($res, $digest) : $res;
1098 }
1099
1100 sub copy_list_with_digest {
1101     my ($list) = @_;
1102
1103     my $sha = Digest::SHA->new('sha1');
1104
1105     my $res = [];
1106     foreach my $entry (@$list) {
1107         my $data = {};
1108         foreach my $k (sort keys %$entry) {
1109             my $v = $entry->{$k};
1110             next if !defined($v);
1111             $data->{$k} = $v;
1112             # Note: digest ignores refs ($rule->{errors})
1113             # since Digest::SHA expects a series of bytes,
1114             #  we have to encode the value here to prevent errors when
1115             #  using utf8 characters (eg. in comments)
1116             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1117         }
1118         push @$res, $data;
1119     }
1120
1121     my $digest = $sha->hexdigest;
1122
1123     foreach my $entry (@$res) {
1124         $entry->{digest} = $digest;
1125     }
1126
1127     return wantarray ? ($res, $digest) : $res;
1128 }
1129
1130 our $cluster_option_properties = {
1131     enable => {
1132         description => "Enable or disable the firewall cluster wide.",
1133         type => 'integer',
1134         minimum => 0,
1135         optional => 1,
1136     },
1137     policy_in => {
1138         description => "Input policy.",
1139         type => 'string',
1140         optional => 1,
1141         enum => ['ACCEPT', 'REJECT', 'DROP'],
1142     },
1143     policy_out => {
1144         description => "Output policy.",
1145         type => 'string',
1146         optional => 1,
1147         enum => ['ACCEPT', 'REJECT', 'DROP'],
1148     },
1149 };
1150
1151 our $host_option_properties = {
1152     enable => {
1153         description => "Enable host firewall rules.",
1154         type => 'boolean',
1155         optional => 1,
1156     },
1157     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1158         description => "Log level for incoming traffic." }),
1159     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1160         description => "Log level for outgoing traffic." }),
1161     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1162         description => "Log level for illegal tcp flags filter." }),
1163     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1164         description => "Log level for SMURFS filter." }),
1165     nosmurfs => {
1166         description => "Enable SMURFS filter.",
1167         type => 'boolean',
1168         optional => 1,
1169     },
1170     tcpflags => {
1171         description => "Filter illegal combinations of TCP flags.",
1172         type => 'boolean',
1173         optional => 1,
1174     },
1175     nf_conntrack_max => {
1176         description => "Maximum number of tracked connections.",
1177         type => 'integer',
1178         optional => 1,
1179         minimum => 32768,
1180     },
1181     nf_conntrack_tcp_timeout_established => {
1182         description => "Conntrack established timeout.",
1183         type => 'integer',
1184         optional => 1,
1185         minimum => 7875,
1186     },
1187     ndp => {
1188         description => "Enable NDP.",
1189         type => 'boolean',
1190         optional => 1,
1191     },
1192 };
1193
1194 our $vm_option_properties = {
1195     enable => {
1196         description => "Enable/disable firewall rules.",
1197         type => 'boolean',
1198         optional => 1,
1199     },
1200     macfilter => {
1201         description => "Enable/disable MAC address filter.",
1202         type => 'boolean',
1203         optional => 1,
1204     },
1205     dhcp => {
1206         description => "Enable DHCP.",
1207         type => 'boolean',
1208         optional => 1,
1209     },
1210     ndp => {
1211         description => "Enable NDP.",
1212         type => 'boolean',
1213         optional => 1,
1214     },
1215     radv => {
1216         description => "Allow sending Router Advertisement.",
1217         type => 'boolean',
1218         optional => 1,
1219     },
1220     ipfilter => {
1221         description => "Enable default IP filters. " .
1222            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1223            "for every interface. Such ipsets implicitly contain sane default " .
1224            "restrictions such as restricting IPv6 link local addresses to " .
1225            "the one derived from the interface's MAC address. For containers " .
1226            "the configured IP addresses will be implicitly added.",
1227         type => 'boolean',
1228         optional => 1,
1229     },
1230     policy_in => {
1231         description => "Input policy.",
1232         type => 'string',
1233         optional => 1,
1234         enum => ['ACCEPT', 'REJECT', 'DROP'],
1235     },
1236     policy_out => {
1237         description => "Output policy.",
1238         type => 'string',
1239         optional => 1,
1240         enum => ['ACCEPT', 'REJECT', 'DROP'],
1241     },
1242     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1243         description => "Log level for incoming traffic." }),
1244     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1245         description => "Log level for outgoing traffic." }),
1246
1247 };
1248
1249
1250 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.";
1251
1252 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.";
1253
1254 my $rule_properties = {
1255     pos => {
1256         description => "Update rule at position <pos>.",
1257         type => 'integer',
1258         minimum => 0,
1259         optional => 1,
1260     },
1261     digest => get_standard_option('pve-config-digest'),
1262     type => {
1263         description => "Rule type.",
1264         type => 'string',
1265         optional => 1,
1266         enum => ['in', 'out', 'group'],
1267     },
1268     action => {
1269         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1270         type => 'string',
1271         optional => 1,
1272         pattern => $security_group_name_pattern,
1273         maxLength => 20,
1274         minLength => 2,
1275     },
1276     macro => {
1277         description => "Use predefined standard macro.",
1278         type => 'string',
1279         optional => 1,
1280         maxLength => 128,
1281     },
1282     iface => get_standard_option('pve-iface', {
1283         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.",
1284         optional => 1
1285     }),
1286     source => {
1287         description => "Restrict packet source address. $addr_list_descr",
1288         type => 'string', format => 'pve-fw-addr-spec',
1289         optional => 1,
1290     },
1291     dest => {
1292         description => "Restrict packet destination address. $addr_list_descr",
1293         type => 'string', format => 'pve-fw-addr-spec',
1294         optional => 1,
1295     },
1296     proto => {
1297         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1298         type => 'string', format => 'pve-fw-protocol-spec',
1299         optional => 1,
1300     },
1301     enable => {
1302         description => "Flag to enable/disable a rule.",
1303         type => 'integer',
1304         minimum => 0,
1305         optional => 1,
1306     },
1307     sport => {
1308         description => "Restrict TCP/UDP source port. $port_descr",
1309         type => 'string', format => 'pve-fw-sport-spec',
1310         optional => 1,
1311     },
1312     dport => {
1313         description => "Restrict TCP/UDP destination port. $port_descr",
1314         type => 'string', format => 'pve-fw-dport-spec',
1315         optional => 1,
1316     },
1317     comment => {
1318         description => "Descriptive comment.",
1319         type => 'string',
1320         optional => 1,
1321     },
1322 };
1323
1324 sub add_rule_properties {
1325     my ($properties) = @_;
1326
1327     foreach my $k (keys %$rule_properties) {
1328         my $h = $rule_properties->{$k};
1329         # copy data, so that we can modify later without side effects
1330         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1331     }
1332
1333     return $properties;
1334 }
1335
1336 sub delete_rule_properties {
1337     my ($rule, $delete_str) = @_;
1338
1339     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1340         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1341             if !defined($rule_properties->{$opt});
1342         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1343             if $opt eq 'type' || $opt eq 'action';
1344         delete $rule->{$opt};
1345     }
1346
1347     return $rule;
1348 }
1349
1350 my $apply_macro = sub {
1351     my ($macro_name, $param, $verify, $ipversion) = @_;
1352
1353     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1354     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1355
1356     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1357         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1358     }
1359
1360     # skip macros which are specific to another ipversion
1361     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1362         return if $ipversion != $required;
1363     }
1364
1365     my $rules = [];
1366
1367     foreach my $templ (@$macro_rules) {
1368         my $rule = {};
1369         my $param_used = {};
1370         foreach my $k (keys %$templ) {
1371             my $v = $templ->{$k};
1372             if ($v eq 'PARAM') {
1373                 $v = $param->{$k};
1374                 $param_used->{$k} = 1;
1375             } elsif ($v eq 'DEST') {
1376                 $v = $param->{dest};
1377                 $param_used->{dest} = 1;
1378             } elsif ($v eq 'SOURCE') {
1379                 $v = $param->{source};
1380                 $param_used->{source} = 1;
1381             }
1382
1383             if (!defined($v)) {
1384                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1385                 raise_param_exc({ macro => $msg }) if $verify;
1386                 die "$msg\n";
1387             }
1388             $rule->{$k} = $v;
1389         }
1390         foreach my $k (keys %$param) {
1391             next if $k eq 'macro';
1392             next if !defined($param->{$k});
1393             next if $param_used->{$k};
1394             if (defined($rule->{$k})) {
1395                 if ($rule->{$k} ne $param->{$k}) {
1396                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1397                     raise_param_exc({ $k => $msg }) if $verify;
1398                     die "$msg\n";
1399                 }
1400             } else {
1401                 $rule->{$k} = $param->{$k};
1402             }
1403         }
1404         push @$rules, $rule;
1405     }
1406
1407     return $rules;
1408 };
1409
1410 my $rule_env_iface_lookup = {
1411     'ct' => 1,
1412     'vm' => 1,
1413     'group' => 0,
1414     'cluster' => 1,
1415     'host' => 1,
1416 };
1417
1418 sub verify_rule {
1419     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1420
1421     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1422
1423     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1424     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1425
1426     my $errors = $rule->{errors} || {};
1427
1428     my $error_count = 0;
1429
1430     my $add_error = sub {
1431         my ($param, $msg)  = @_;
1432         chomp $msg;
1433         raise_param_exc({ $param => $msg }) if !$noerr;
1434         $error_count++;
1435         $errors->{$param} = $msg if !$errors->{$param};
1436     };
1437
1438     my $ipversion;
1439     my $set_ip_version = sub {
1440         my $vers = shift;
1441         if ($vers) {
1442             die "detected mixed ipv4/ipv6 adresses in rule\n"
1443                 if $ipversion && ($vers != $ipversion);
1444             $ipversion = $vers;
1445         }
1446     };
1447
1448     my $check_ipset_or_alias_property = sub {
1449         my ($name, $expected_ipversion) = @_;
1450
1451         if (my $value = $rule->{$name}) {
1452             if ($value =~ m/^\+/) {
1453                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1454                     &$add_error($name, "no such ipset '$1'")
1455                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1456
1457                 } else {
1458                     &$add_error($name, "invalid ipset name '$value'");
1459                 }
1460             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1461                 my $alias = lc($value);
1462                 &$add_error($name, "no such alias '$value'")
1463                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1464                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1465                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1466
1467                 &$set_ip_version($e->{ipversion});
1468             }
1469         }
1470     };
1471
1472     my $type = $rule->{type};
1473     my $action = $rule->{action};
1474
1475     &$add_error('type', "missing property") if !$type;
1476     &$add_error('action', "missing property") if !$action;
1477
1478     if ($type) {
1479         if ($type eq  'in' || $type eq 'out') {
1480             &$add_error('action', "unknown action '$action'")
1481                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1482         } elsif ($type eq 'group') {
1483             &$add_error('type', "security groups not allowed")
1484                 if !$allow_groups;
1485             &$add_error('action', "invalid characters in security group name")
1486                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1487         } else {
1488             &$add_error('type', "unknown rule type '$type'");
1489         }
1490     }
1491
1492     if ($rule->{iface}) {
1493         &$add_error('type', "parameter -i not allowed for this rule type")
1494             if !$allow_iface;
1495         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1496         &$add_error('iface', $@) if $@;
1497         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1498             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1499                 if $rule->{iface} !~  m/^net(\d+)$/;
1500         }
1501     }
1502
1503     if ($rule->{macro}) {
1504         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1505             $rule->{macro} = $preferred_name;
1506         } else {
1507             &$add_error('macro', "unknown macro '$rule->{macro}'");
1508         }
1509     }
1510
1511     if ($rule->{proto}) {
1512         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1513         &$add_error('proto', $@) if $@;
1514         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1515         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1516     }
1517
1518     if ($rule->{dport}) {
1519         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1520         &$add_error('dport', $@) if $@;
1521         my $proto = $rule->{proto};
1522         &$add_error('proto', "missing property - 'dport' requires this property")
1523             if !$proto;
1524         &$add_error('dport', "protocol '$proto' does not support ports")
1525             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1526                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1527     }
1528
1529     if ($rule->{sport}) {
1530         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1531         &$add_error('sport', $@) if $@;
1532         my $proto = $rule->{proto};
1533         &$add_error('proto', "missing property - 'sport' requires this property")
1534             if !$proto;
1535         &$add_error('sport', "protocol '$proto' does not support ports")
1536             if !$PROTOCOLS_WITH_PORTS->{$proto};
1537     }
1538
1539     if ($rule->{source}) {
1540         eval {
1541             my $source_ipversion = parse_address_list($rule->{source});
1542             &$set_ip_version($source_ipversion);
1543         };
1544         &$add_error('source', $@) if $@;
1545         &$check_ipset_or_alias_property('source', $ipversion);
1546     }
1547
1548     if ($rule->{dest}) {
1549         eval {
1550             my $dest_ipversion = parse_address_list($rule->{dest});
1551             &$set_ip_version($dest_ipversion);
1552         };
1553         &$add_error('dest', $@) if $@;
1554         &$check_ipset_or_alias_property('dest', $ipversion);
1555     }
1556
1557     $rule->{ipversion} = $ipversion if $ipversion;
1558
1559     if ($rule->{macro} && !$error_count) {
1560         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1561         if (my $err = $@) {
1562             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1563                 my $eh = $err->{errors};
1564                 foreach my $p (keys %$eh) {
1565                     &$add_error($p, $eh->{$p});
1566                 }
1567             } else {
1568                 &$add_error('macro', "$err");
1569             }
1570         }
1571     }
1572
1573     $rule->{errors} = $errors if $error_count;
1574
1575     return $rule;
1576 }
1577
1578 sub copy_rule_data {
1579     my ($rule, $param) = @_;
1580
1581     foreach my $k (keys %$rule_properties) {
1582         if (defined(my $v = $param->{$k})) {
1583             if ($v eq '' || $v eq '-') {
1584                 delete $rule->{$k};
1585             } else {
1586                 $rule->{$k} = $v;
1587             }
1588         }
1589     }
1590
1591     return $rule;
1592 }
1593
1594 sub rules_modify_permissions {
1595     my ($rule_env) = @_;
1596
1597     if ($rule_env eq 'host') {
1598         return {
1599             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1600         };
1601     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1602         return {
1603             check => ['perm', '/', [ 'Sys.Modify' ]],
1604         };
1605     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1606         return {
1607             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1608         }
1609     }
1610
1611     return undef;
1612 }
1613
1614 sub rules_audit_permissions {
1615     my ($rule_env) = @_;
1616
1617     if ($rule_env eq 'host') {
1618         return {
1619             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1620         };
1621     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1622         return {
1623             check => ['perm', '/', [ 'Sys.Audit' ]],
1624         };
1625     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1626         return {
1627             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1628         }
1629     }
1630
1631     return undef;
1632 }
1633
1634 # core functions
1635 my $bridge_firewall_enabled = 0;
1636
1637 sub enable_bridge_firewall {
1638
1639     return if $bridge_firewall_enabled; # only once
1640
1641     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1642     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1643
1644     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1645     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1646
1647     $bridge_firewall_enabled = 1;
1648 }
1649
1650 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1651
1652 sub iptables_restore_cmdlist {
1653     my ($cmdlist) = @_;
1654
1655     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1656 }
1657
1658 sub ip6tables_restore_cmdlist {
1659     my ($cmdlist) = @_;
1660
1661     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1662 }
1663
1664 sub ipset_restore_cmdlist {
1665     my ($cmdlist) = @_;
1666
1667     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1668 }
1669
1670 sub iptables_get_chains {
1671     my ($iptablescmd) = @_;
1672
1673     $iptablescmd = "iptables" if !$iptablescmd;
1674
1675     my $res = {};
1676
1677     # check what chains we want to track
1678     my $is_pvefw_chain = sub {
1679         my $name = shift;
1680
1681         return 1 if $name =~ m/^PVEFW-\S+$/;
1682
1683         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1684
1685         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1686
1687         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1688         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1689
1690         return undef;
1691     };
1692
1693     my $table = '';
1694
1695     my $hooks = {};
1696
1697     my $parser = sub {
1698         my $line = shift;
1699
1700         return if $line =~ m/^#/;
1701         return if $line =~ m/^\s*$/;
1702
1703         if ($line =~ m/^\*(\S+)$/) {
1704             $table = $1;
1705             return;
1706         }
1707
1708         return if $table ne 'filter';
1709
1710         if ($line =~ m/^:(\S+)\s/) {
1711             my $chain = $1;
1712             return if !&$is_pvefw_chain($chain);
1713             $res->{$chain} = "unknown";
1714         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1715             my ($chain, $sig) = ($1, $2);
1716             return if !&$is_pvefw_chain($chain);
1717             $res->{$chain} = $sig;
1718         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1719             $hooks->{$1} = 1;
1720         } else {
1721             # simply ignore the rest
1722             return;
1723         }
1724     };
1725
1726     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1727
1728     return wantarray ? ($res, $hooks) : $res;
1729 }
1730
1731 sub iptables_chain_digest {
1732     my ($rules) = @_;
1733     my $digest = Digest::SHA->new('sha1');
1734     foreach my $rule (@$rules) { # order is important
1735         $digest->add($rule);
1736     }
1737     return $digest->b64digest;
1738 }
1739
1740 sub ipset_chain_digest {
1741     my ($rules) = @_;
1742
1743     my $digest = Digest::SHA->new('sha1');
1744     foreach my $rule (sort @$rules) { # note: sorted
1745         $digest->add($rule);
1746     }
1747     return $digest->b64digest;
1748 }
1749
1750 sub ipset_get_chains {
1751
1752     my $res = {};
1753     my $chains = {};
1754
1755     my $parser = sub {
1756         my $line = shift;
1757
1758         return if $line =~ m/^#/;
1759         return if $line =~ m/^\s*$/;
1760         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1761             my $chain = $1;
1762             $line =~ s/\s+$//; # delete trailing white space
1763             push @{$chains->{$chain}}, $line;
1764         } else {
1765             # simply ignore the rest
1766             return;
1767         }
1768     };
1769
1770     run_command("/sbin/ipset save", outfunc => $parser);
1771
1772     # compute digest for each chain
1773     foreach my $chain (keys %$chains) {
1774         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1775     }
1776
1777     return $res;
1778 }
1779
1780 sub ruleset_generate_cmdstr {
1781     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1782
1783     return if defined($rule->{enable}) && !$rule->{enable};
1784     return if $rule->{errors};
1785
1786     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1787
1788     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1789     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1790
1791     my @cmd = ();
1792
1793     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1794     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1795
1796     my $source = $rule->{source};
1797     my $dest = $rule->{dest};
1798
1799     if ($source) {
1800         if ($source =~ m/^\+/) {
1801             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1802                 my $name = $1;
1803                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1804                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1805                     push @cmd, "-m set --match-set ${ipset_chain} src";
1806                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1807                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1808                     push @cmd, "-m set --match-set ${ipset_chain} src";
1809                 } else {
1810                     die "no such ipset '$name'\n";
1811                 }
1812             } else {
1813                 die "invalid security group name '$source'\n";
1814             }
1815         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1816             my $alias = lc($source);
1817             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1818             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1819             die "no such alias '$source'\n" if !$e;
1820             push @cmd, "-s $e->{cidr}";
1821         } elsif ($source =~ m/\-/){
1822             push @cmd, "-m iprange --src-range $source";
1823         } else {
1824             push @cmd, "-s $source";
1825         }
1826     }
1827
1828     if ($dest) {
1829         if ($dest =~ m/^\+/) {
1830             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1831                 my $name = $1;
1832                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1833                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1834                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1835                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1836                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1837                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1838                 } else {
1839                     die "no such ipset '$name'\n";
1840                 }
1841             } else {
1842                 die "invalid security group name '$dest'\n";
1843             }
1844         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1845             my $alias = lc($dest);
1846             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1847             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1848             die "no such alias '$dest'\n" if !$e;
1849             push @cmd, "-d $e->{cidr}";
1850         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1851             push @cmd, "-m iprange --dst-range $dest";
1852         } else {
1853             push @cmd, "-d $dest";
1854         }
1855     }
1856
1857     if (my $proto = $rule->{proto}) {
1858         push @cmd, "-p $proto";
1859
1860         my $multiport = 0;
1861         $multiport++ if $nbdport > 1;
1862         $multiport++ if $nbsport > 1;
1863
1864         push @cmd, "--match multiport" if $multiport;
1865
1866         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1867             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1868
1869         if ($rule->{dport}) {
1870             if ($proto eq 'icmp') {
1871                 # Note: we use dport to store --icmp-type
1872                 die "unknown icmp-type '$rule->{dport}'\n"
1873                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1874                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1875             } elsif ($proto eq 'icmpv6') {
1876                 # Note: we use dport to store --icmpv6-type
1877                 die "unknown icmpv6-type '$rule->{dport}'\n"
1878                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1879                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1880             } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1881                 die "protocol $proto does not have ports\n";
1882             } else {
1883                 if ($nbdport > 1) {
1884                     if ($multiport == 2) {
1885                         push @cmd,  "--ports $rule->{dport}";
1886                     } else {
1887                         push @cmd, "--dports $rule->{dport}";
1888                     }
1889                 } else {
1890                     push @cmd, "--dport $rule->{dport}";
1891                 }
1892             }
1893         }
1894
1895         if ($rule->{sport}) {
1896             die "protocol $proto does not have ports\n"
1897                  if !$PROTOCOLS_WITH_PORTS->{$proto};
1898             if ($nbsport > 1) {
1899                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1900             } else {
1901                 push @cmd, "--sport $rule->{sport}";
1902             }
1903         }
1904     } elsif ($rule->{dport} || $rule->{sport}) {
1905         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1906         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1907     }
1908
1909     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1910
1911     if (my $action = $rule->{action}) {
1912         $action = $actions->{$action} if defined($actions->{$action});
1913         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1914         push @cmd, $goto ? "-g $action" : "-j $action";
1915     }
1916
1917     return scalar(@cmd) ? join(' ', @cmd) : undef;
1918 }
1919
1920 sub ruleset_generate_rule {
1921     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1922
1923     my $rules;
1924
1925     if ($rule->{macro}) {
1926         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1927     } else {
1928         $rules = [ $rule ];
1929     }
1930
1931     # update all or nothing
1932
1933     my @cmds = ();
1934     foreach my $tmp (@$rules) {
1935         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1936             push @cmds, $cmdstr;
1937         }
1938     }
1939
1940     foreach my $cmdstr (@cmds) {
1941         ruleset_addrule($ruleset, $chain, $cmdstr);
1942     }
1943 }
1944
1945 sub ruleset_generate_rule_insert {
1946     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1947
1948     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1949
1950     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1951         ruleset_insertrule($ruleset, $chain, $cmdstr);
1952     }
1953 }
1954
1955 sub ruleset_create_chain {
1956     my ($ruleset, $chain) = @_;
1957
1958     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1959     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1960
1961     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1962
1963     $ruleset->{$chain} = [];
1964 }
1965
1966 sub ruleset_chain_exist {
1967     my ($ruleset, $chain) = @_;
1968
1969     return $ruleset->{$chain} ? 1 : undef;
1970 }
1971
1972 sub ruleset_addrule {
1973    my ($ruleset, $chain, $rule) = @_;
1974
1975    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1976
1977    push @{$ruleset->{$chain}}, "-A $chain $rule";
1978 }
1979
1980 sub ruleset_insertrule {
1981    my ($ruleset, $chain, $rule) = @_;
1982
1983    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1984
1985    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1986 }
1987
1988 sub get_log_rule_base {
1989     my ($chain, $vmid, $msg, $loglevel) = @_;
1990
1991     die "internal error - no log level" if !defined($loglevel);
1992
1993     $vmid = 0 if !defined($vmid);
1994
1995     # Note: we use special format for prefix to pass further
1996     # info to log daemon (VMID, LOGVELEL and CHAIN)
1997
1998     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1999 }
2000
2001 sub ruleset_addlog {
2002     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
2003
2004     return if !defined($loglevel);
2005
2006     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
2007
2008     $logrule = "$rule $logrule" if defined($rule);
2009
2010     ruleset_addrule($ruleset, $chain, $logrule);
2011 }
2012
2013 sub ruleset_add_chain_policy {
2014     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2015
2016     if ($policy eq 'ACCEPT') {
2017
2018         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2019                               { ACCEPT =>  $accept_action});
2020
2021     } elsif ($policy eq 'DROP') {
2022
2023         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
2024
2025         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2026
2027         ruleset_addrule($ruleset, $chain, "-j DROP");
2028     } elsif ($policy eq 'REJECT') {
2029         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2030
2031         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2032
2033         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2034     } else {
2035         # should not happen
2036         die "internal error: unknown policy '$policy'";
2037     }
2038 }
2039
2040 sub ruleset_chain_add_ndp {
2041     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2042     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2043
2044     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2045     if ($direction ne 'OUT' || $options->{radv}) {
2046         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2047     }
2048     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2049     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2050 }
2051
2052 sub ruleset_chain_add_conn_filters {
2053     my ($ruleset, $chain, $accept) = @_;
2054
2055     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2056     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2057 }
2058
2059 sub ruleset_chain_add_input_filters {
2060     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2061
2062     if ($cluster_conf->{ipset}->{blacklist}){
2063         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2064             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2065             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2066             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2067         }
2068         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2069         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2070     }
2071
2072     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2073         if ($ipversion == 4) {
2074             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2075         }
2076     }
2077
2078     if ($options->{tcpflags}) {
2079         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2080     }
2081 }
2082
2083 sub ruleset_create_vm_chain {
2084     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2085
2086     ruleset_create_chain($ruleset, $chain);
2087     my $accept = generate_nfqueue($options);
2088
2089     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2090         if ($ipversion == 4) {
2091             if ($direction eq 'OUT') {
2092                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2093                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2094                                         proto => 'udp', sport => 68, dport => 67 });
2095             } else {
2096                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2097                                       { action => 'ACCEPT',
2098                                         proto => 'udp', sport => 67, dport => 68 });
2099             }
2100         } elsif ($ipversion == 6) {
2101             if ($direction eq 'OUT') {
2102                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2103                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2104                                         proto => 'udp', sport => 546, dport => 547 });
2105             } else {
2106                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2107                                       { action => 'ACCEPT',
2108                                         proto => 'udp', sport => 547, dport => 546 });
2109             }
2110         }
2111
2112     }
2113
2114     if ($direction eq 'OUT') {
2115         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2116             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2117         }
2118         if ($ipversion == 6 && !$options->{radv}) {
2119             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2120         }
2121         if ($ipfilter_ipset) {
2122             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2123         }
2124         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2125     }
2126
2127     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2128     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2129 }
2130
2131 sub ruleset_add_group_rule {
2132     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2133
2134     my $group = $rule->{action};
2135     my $group_chain = "GROUP-$group-$direction";
2136     if(!ruleset_chain_exist($ruleset, $group_chain)){
2137         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2138     }
2139
2140     if ($direction eq 'OUT' && $rule->{iface_out}) {
2141         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2142     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2143         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2144     } else {
2145         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2146     }
2147
2148     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2149 }
2150
2151 sub ruleset_generate_vm_rules {
2152     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2153
2154     my $lc_direction = lc($direction);
2155
2156     my $in_accept = generate_nfqueue($options);
2157
2158     foreach my $rule (@$rules) {
2159         next if $rule->{iface} && $rule->{iface} ne $netid;
2160         next if !$rule->{enable} || $rule->{errors};
2161         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2162
2163         if ($rule->{type} eq 'group') {
2164             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2165                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2166         } else {
2167             next if $rule->{type} ne $lc_direction;
2168             eval {
2169                 if ($direction eq 'OUT') {
2170                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2171                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2172                                           undef, $cluster_conf, $vmfw_conf);
2173                 } else {
2174                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2175                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2176                                           undef, $cluster_conf, $vmfw_conf);
2177                 }
2178             };
2179             warn $@ if $@;
2180         }
2181     }
2182 }
2183
2184 sub generate_nfqueue {
2185     my ($options) = @_;
2186
2187     if ($options->{ips}) {
2188         my $action = "NFQUEUE";
2189         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2190             if (defined($3) && defined($1)) {
2191                 $action .= " --queue-balance $1:$3";
2192             } elsif (defined($1)) {
2193                 $action .= " --queue-num $1";
2194             }
2195         }
2196         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2197         return $action;
2198     } else {
2199         return "ACCEPT";
2200     }
2201 }
2202
2203 sub ruleset_generate_vm_ipsrules {
2204     my ($ruleset, $options, $direction, $iface) = @_;
2205
2206     if ($options->{ips} && $direction eq 'IN') {
2207         my $nfqueue = generate_nfqueue($options);
2208
2209         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2210             ruleset_create_chain($ruleset, "PVEFW-IPS");
2211         }
2212
2213         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2214     }
2215 }
2216
2217 sub generate_tap_rules_direction {
2218     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2219
2220     my $lc_direction = lc($direction);
2221
2222     my $rules = $vmfw_conf->{rules};
2223
2224     my $options = $vmfw_conf->{options};
2225     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2226
2227     my $tapchain = "$iface-$direction";
2228
2229     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2230     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2231         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2232
2233     # create chain with mac and ip filter
2234     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2235
2236     if ($options->{enable}) {
2237         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2238
2239         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2240
2241         # implement policy
2242         my $policy;
2243
2244         if ($direction eq 'OUT') {
2245             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2246         } else {
2247         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2248         }
2249
2250         my $accept = generate_nfqueue($options);
2251         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2252         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2253     } else {
2254         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2255         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2256     }
2257
2258     # plug the tap chain to bridge chain
2259     if ($direction eq 'IN') {
2260         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2261                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2262     } else {
2263         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2264                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2265     }
2266 }
2267
2268 sub enable_host_firewall {
2269     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2270
2271     my $options = $hostfw_conf->{options};
2272     my $cluster_options = $cluster_conf->{options};
2273     my $rules = $hostfw_conf->{rules};
2274     my $cluster_rules = $cluster_conf->{rules};
2275
2276     # host inbound firewall
2277     my $chain = "PVEFW-HOST-IN";
2278     ruleset_create_chain($ruleset, $chain);
2279
2280     my $loglevel = get_option_log_level($options, "log_level_in");
2281
2282     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2283
2284     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2285     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2286     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2287
2288     # we use RETURN because we need to check also tap rules
2289     my $accept_action = 'RETURN';
2290
2291     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2292
2293     # add host rules first, so that cluster wide rules can be overwritten
2294     foreach my $rule (@$rules, @$cluster_rules) {
2295         next if !$rule->{enable} || $rule->{errors};
2296         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2297
2298         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2299
2300         eval {
2301             if ($rule->{type} eq 'group') {
2302                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2303             } elsif ($rule->{type} eq 'in') {
2304                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2305                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2306                                       undef, $cluster_conf, $hostfw_conf);
2307             }
2308         };
2309         warn $@ if $@;
2310         delete $rule->{iface_in};
2311     }
2312
2313     # allow standard traffic for management ipset (includes cluster network)
2314     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2315     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2316     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2317     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2318     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2319     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2320
2321     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2322     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2323
2324     # corosync
2325     if ($localnet && ($ipversion == $localnet_ver)) {
2326         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2327         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2328         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2329     }
2330
2331     # implement input policy
2332     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2333     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2334
2335     # host outbound firewall
2336     $chain = "PVEFW-HOST-OUT";
2337     ruleset_create_chain($ruleset, $chain);
2338
2339     $loglevel = get_option_log_level($options, "log_level_out");
2340
2341     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2342
2343     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2344
2345     # we use RETURN because we may want to check other thigs later
2346     $accept_action = 'RETURN';
2347     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2348
2349     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2350
2351     # add host rules first, so that cluster wide rules can be overwritten
2352     foreach my $rule (@$rules, @$cluster_rules) {
2353         next if !$rule->{enable} || $rule->{errors};
2354         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2355
2356         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2357         eval {
2358             if ($rule->{type} eq 'group') {
2359                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2360             } elsif ($rule->{type} eq 'out') {
2361                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2362                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2363                                       undef, $cluster_conf, $hostfw_conf);
2364             }
2365         };
2366         warn $@ if $@;
2367         delete $rule->{iface_out};
2368     }
2369
2370     # allow standard traffic on cluster network
2371     if ($localnet && ($ipversion == $localnet_ver)) {
2372         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2373         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2374         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2375         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2376
2377         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2378         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2379         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2380     }
2381
2382     # implement output policy
2383     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2384     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2385
2386     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2387     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2388 }
2389
2390 sub generate_group_rules {
2391     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2392
2393     my $rules = $cluster_conf->{groups}->{$group};
2394
2395     if (!$rules) {
2396         warn "no such security group '$group'\n";
2397         $rules = []; # create empty chain
2398     }
2399
2400     my $chain = "GROUP-${group}-IN";
2401
2402     ruleset_create_chain($ruleset, $chain);
2403     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2404
2405     foreach my $rule (@$rules) {
2406         next if $rule->{type} ne 'in';
2407         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2408         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2409                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2410                               undef, $cluster_conf);
2411     }
2412
2413     $chain = "GROUP-${group}-OUT";
2414
2415     ruleset_create_chain($ruleset, $chain);
2416     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2417
2418     foreach my $rule (@$rules) {
2419         next if $rule->{type} ne 'out';
2420         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2421         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2422         # check also other tap rules later
2423         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2424                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2425                               undef, $cluster_conf);
2426     }
2427 }
2428
2429 my $MAX_NETS = 32;
2430 my $valid_netdev_names = {};
2431 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2432     $valid_netdev_names->{"net$i"} = 1;
2433 }
2434
2435 sub get_mark_values {
2436     my ($value, $mask) = @_;
2437     $value = hex($value) if $value =~ /^0x/;
2438     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2439     $mask = 0xffffffff if !defined($mask);
2440     return ($value, $mask);
2441 }
2442
2443 sub parse_fw_rule {
2444     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2445
2446     my $orig_line = $line;
2447
2448     my $rule = {};
2449
2450     # we can add single line comments to the end of the rule
2451     if ($line =~ s/#\s*(.*?)\s*$//) {
2452         $rule->{comment} = decode('utf8', $1);
2453     }
2454
2455     # we can disable a rule when prefixed with '|'
2456
2457     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2458
2459     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2460         die "unable to parse rule: $line\n";
2461
2462     $rule->{type} = lc($1);
2463     $rule->{action} = $2;
2464
2465     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2466         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2467             $rule->{macro} = $1;
2468             $rule->{action} = $2;
2469         }
2470     }
2471
2472     while (length($line)) {
2473         if ($line =~ s/^-i (\S+)\s*//) {
2474             $rule->{iface} = $1;
2475             next;
2476         }
2477
2478         last if $rule->{type} eq 'group';
2479
2480         if ($line =~ s/^-p (\S+)\s*//) {
2481             $rule->{proto} = $1;
2482             next;
2483         }
2484
2485         if ($line =~ s/^-dport (\S+)\s*//) {
2486             $rule->{dport} = $1;
2487             next;
2488         }
2489
2490         if ($line =~ s/^-sport (\S+)\s*//) {
2491             $rule->{sport} = $1;
2492             next;
2493         }
2494         if ($line =~ s/^-source (\S+)\s*//) {
2495             $rule->{source} = $1;
2496             next;
2497         }
2498         if ($line =~ s/^-dest (\S+)\s*//) {
2499             $rule->{dest} = $1;
2500             next;
2501         }
2502
2503         last;
2504     }
2505
2506     die "unable to parse rule parameters: $line\n" if length($line);
2507
2508     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2509     if ($verbose && $rule->{errors}) {
2510         warn "$prefix - errors in rule parameters: $orig_line\n";
2511         foreach my $p (keys %{$rule->{errors}}) {
2512             warn "  $p: $rule->{errors}->{$p}\n";
2513         }
2514     }
2515
2516     return $rule;
2517 }
2518
2519 sub parse_vmfw_option {
2520     my ($line) = @_;
2521
2522     my ($opt, $value);
2523
2524     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2525
2526     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2527         $opt = lc($1);
2528         $value = int($2);
2529     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2530         $opt = lc($1);
2531         $value = $2 ? lc($3) : '';
2532     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2533         $opt = lc($1);
2534         $value = uc($3);
2535     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2536         $opt = lc($1);
2537         $value = $2;
2538     } else {
2539         die "can't parse option '$line'\n"
2540     }
2541
2542     return ($opt, $value);
2543 }
2544
2545 sub parse_hostfw_option {
2546     my ($line) = @_;
2547
2548     my ($opt, $value);
2549
2550     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2551
2552     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2553         $opt = lc($1);
2554         $value = int($2);
2555     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2556         $opt = lc($1);
2557         $value = $2 ? lc($3) : '';
2558     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2559         $opt = lc($1);
2560         $value = int($2);
2561     } else {
2562         die "can't parse option '$line'\n"
2563     }
2564
2565     return ($opt, $value);
2566 }
2567
2568 sub parse_clusterfw_option {
2569     my ($line) = @_;
2570
2571     my ($opt, $value);
2572
2573     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2574         $opt = lc($1);
2575         $value = int($2);
2576         if (($value > 1) && ((time() - $value) > 60)) {
2577             $value = 0
2578         }
2579     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2580         $opt = lc($1);
2581         $value = uc($3);
2582     } else {
2583         die "can't parse option '$line'\n"
2584     }
2585
2586     return ($opt, $value);
2587 }
2588
2589 sub resolve_alias {
2590     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2591
2592     my $alias = lc($cidr);
2593     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2594     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2595
2596     die "no such alias '$cidr'\n" if !$e;;
2597
2598     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2599 }
2600
2601 sub parse_ip_or_cidr {
2602     my ($cidr) = @_;
2603
2604     my $ipversion;
2605
2606     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2607         $cidr =~ s|/128$||;
2608         $ipversion = 6;
2609     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2610         $cidr =~ s|/32$||;
2611         $ipversion = 4;
2612     } else {
2613         die "value does not look like a valid IP address or CIDR network\n";
2614     }
2615
2616     return wantarray ? ($cidr, $ipversion) : $cidr;
2617 }
2618
2619 sub parse_alias {
2620     my ($line) = @_;
2621
2622     # we can add single line comments to the end of the line
2623     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2624
2625     if ($line =~ m/^(\S+)\s(\S+)$/) {
2626         my ($name, $cidr) = ($1, $2);
2627         my $ipversion;
2628
2629         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2630
2631         my $data = {
2632             name => $name,
2633             cidr => $cidr,
2634             ipversion => $ipversion,
2635         };
2636         $data->{comment} = $comment  if $comment;
2637         return $data;
2638     }
2639
2640     return undef;
2641 }
2642
2643 sub generic_fw_config_parser {
2644     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2645
2646     my $section;
2647     my $group;
2648
2649     my $res = $empty_conf;
2650
2651     while (defined(my $line = <$fh>)) {
2652         next if $line =~ m/^#/;
2653         next if $line =~ m/^\s*$/;
2654
2655         chomp $line;
2656
2657         my $linenr = $fh->input_line_number();
2658         my $prefix = "$filename (line $linenr)";
2659
2660         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2661             $section = 'options';
2662             next;
2663         }
2664
2665         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2666             $section = 'aliases';
2667             next;
2668         }
2669
2670         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2671             $section = 'groups';
2672             $group = lc($1);
2673             my $comment = $2;
2674             eval {
2675                 die "security group name too long\n" if length($group) > $max_group_name_length;
2676                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2677             };
2678             if (my $err = $@) {
2679                 ($section, $group, $comment) = undef;
2680                 warn "$prefix: $err";
2681                 next;
2682             }
2683
2684             $res->{$section}->{$group} = [];
2685             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2686                 if $comment;
2687             next;
2688         }
2689
2690         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2691             $section = 'rules';
2692             next;
2693         }
2694
2695         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2696             $section = 'ipset';
2697             $group = lc($1);
2698             my $comment = $2;
2699             eval {
2700                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2701                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2702             };
2703             if (my $err = $@) {
2704                 ($section, $group, $comment) = undef;
2705                 warn "$prefix: $err";
2706                 next;
2707             }
2708
2709             $res->{$section}->{$group} = [];
2710             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2711                 if $comment;
2712             next;
2713         }
2714
2715         if (!$section) {
2716             warn "$prefix: skip line - no section\n";
2717             next;
2718         }
2719
2720         if ($section eq 'options') {
2721             eval {
2722                 my ($opt, $value);
2723                 if ($rule_env eq 'cluster') {
2724                     ($opt, $value) = parse_clusterfw_option($line);
2725                 } elsif ($rule_env eq 'host') {
2726                     ($opt, $value) = parse_hostfw_option($line);
2727                 } else {
2728                     ($opt, $value) = parse_vmfw_option($line);
2729                 }
2730                 $res->{options}->{$opt} = $value;
2731             };
2732             warn "$prefix: $@" if $@;
2733         } elsif ($section eq 'aliases') {
2734             eval {
2735                 my $data = parse_alias($line);
2736                 $res->{aliases}->{lc($data->{name})} = $data;
2737             };
2738             warn "$prefix: $@" if $@;
2739         } elsif ($section eq 'rules') {
2740             my $rule;
2741             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2742             if (my $err = $@) {
2743                 warn "$prefix: $err";
2744                 next;
2745             }
2746             push @{$res->{$section}}, $rule;
2747         } elsif ($section eq 'groups') {
2748             my $rule;
2749             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2750             if (my $err = $@) {
2751                 warn "$prefix: $err";
2752                 next;
2753             }
2754             push @{$res->{$section}->{$group}}, $rule;
2755         } elsif ($section eq 'ipset') {
2756             # we can add single line comments to the end of the rule
2757             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2758
2759             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2760             my $nomatch = $1;
2761             my $cidr = $2;
2762             my $errors;
2763
2764             if ($nomatch && !$feature_ipset_nomatch) {
2765                 $errors->{nomatch} = "nomatch not supported by kernel";
2766             }
2767
2768             eval {
2769                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2770                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2771                 } else {
2772                     $cidr = parse_ip_or_cidr($cidr);
2773                 }
2774             };
2775             if (my $err = $@) {
2776                 chomp $err;
2777                 $errors->{cidr} = $err;
2778             }
2779
2780             if ($cidr =~ m!/0+$!) {
2781                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2782             }
2783
2784             my $entry = { cidr => $cidr };
2785             $entry->{nomatch} = 1 if $nomatch;
2786             $entry->{comment} = $comment if $comment;
2787             $entry->{errors} =  $errors if $errors;
2788
2789             if ($verbose && $errors) {
2790                 warn "$prefix - errors in ipset '$group': $line\n";
2791                 foreach my $p (keys %{$errors}) {
2792                     warn "  $p: $errors->{$p}\n";
2793                 }
2794             }
2795
2796             push @{$res->{$section}->{$group}}, $entry;
2797         } else {
2798             warn "$prefix: skip line - unknown section\n";
2799             next;
2800         }
2801     }
2802
2803     return $res;
2804 }
2805
2806 sub parse_hostfw_config {
2807     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2808
2809     my $empty_conf = { rules => [], options => {}};
2810
2811     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2812 }
2813
2814 sub parse_vmfw_config {
2815     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2816
2817     my $empty_conf = {
2818         rules => [],
2819         options => {},
2820         aliases => {},
2821         ipset => {} ,
2822         ipset_comments => {},
2823     };
2824
2825     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2826 }
2827
2828 sub parse_clusterfw_config {
2829     my ($filename, $fh, $verbose) = @_;
2830
2831     my $section;
2832     my $group;
2833
2834     my $empty_conf = {
2835         rules => [],
2836         options => {},
2837         aliases => {},
2838         groups => {},
2839         group_comments => {},
2840         ipset => {} ,
2841         ipset_comments => {},
2842     };
2843
2844     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2845 }
2846
2847 sub run_locked {
2848     my ($code, @param) = @_;
2849
2850     my $timeout = 10;
2851
2852     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2853
2854     die $@ if $@;
2855
2856     return $res;
2857 }
2858
2859 sub read_local_vm_config {
2860
2861     my $qemu = {};
2862     my $lxc = {};
2863
2864     my $vmdata = { qemu => $qemu, lxc => $lxc };
2865
2866     my $vmlist = PVE::Cluster::get_vmlist();
2867     return $vmdata if !$vmlist || !$vmlist->{ids};
2868     my $ids = $vmlist->{ids};
2869
2870     foreach my $vmid (keys %$ids) {
2871         next if !$vmid; # skip VE0
2872         my $d = $ids->{$vmid};
2873         next if !$d->{node} || $d->{node} ne $nodename;
2874         next if !$d->{type};
2875         if ($d->{type} eq 'qemu') {
2876             if ($have_qemu_server) {
2877                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2878                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2879                     $qemu->{$vmid} = $conf;
2880                 }
2881             }
2882         } elsif ($d->{type} eq 'lxc') {
2883             if ($have_lxc) {
2884                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2885                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2886                     $lxc->{$vmid} = $conf;
2887                 }
2888             }
2889         }
2890     }
2891
2892     return $vmdata;
2893 };
2894
2895 sub load_vmfw_conf {
2896     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2897
2898     my $vmfw_conf = {};
2899
2900     $dir = $pvefw_conf_dir if !defined($dir);
2901
2902     my $filename = "$dir/$vmid.fw";
2903     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2904         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2905         $vmfw_conf->{vmid} = $vmid;
2906     }
2907
2908     return $vmfw_conf;
2909 }
2910
2911 my $format_rules = sub {
2912     my ($rules, $allow_iface) = @_;
2913
2914     my $raw = '';
2915
2916     foreach my $rule (@$rules) {
2917         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2918             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2919             $raw .= uc($rule->{type});
2920             if ($rule->{macro}) {
2921                 $raw .= " $rule->{macro}($rule->{action})";
2922             } else {
2923                 $raw .= " " . $rule->{action};
2924             }
2925             if ($allow_iface && $rule->{iface}) {
2926                 $raw .= " -i $rule->{iface}";
2927             }
2928
2929             if ($rule->{type} ne  'group')  {
2930                 $raw .= " -source $rule->{source}" if $rule->{source};
2931                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2932                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2933                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2934                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2935             }
2936
2937             $raw .= " # " . encode('utf8', $rule->{comment})
2938                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2939             $raw .= "\n";
2940         } else {
2941             die "unknown rule type '$rule->{type}'";
2942         }
2943     }
2944
2945     return $raw;
2946 };
2947
2948 my $format_options = sub {
2949     my ($options) = @_;
2950
2951     my $raw = '';
2952
2953     $raw .= "[OPTIONS]\n\n";
2954     foreach my $opt (keys %$options) {
2955         $raw .= "$opt: $options->{$opt}\n";
2956     }
2957     $raw .= "\n";
2958
2959     return $raw;
2960 };
2961
2962 my $format_aliases = sub {
2963     my ($aliases) = @_;
2964
2965     my $raw = '';
2966
2967     $raw .= "[ALIASES]\n\n";
2968     foreach my $k (keys %$aliases) {
2969         my $e = $aliases->{$k};
2970         $raw .= "$e->{name} $e->{cidr}";
2971         $raw .= " # " . encode('utf8', $e->{comment})
2972             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2973         $raw .= "\n";
2974     }
2975     $raw .= "\n";
2976
2977     return $raw;
2978 };
2979
2980 my $format_ipsets = sub {
2981     my ($fw_conf) = @_;
2982
2983     my $raw = '';
2984
2985     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2986         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2987             my $utf8comment = encode('utf8', $comment);
2988             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2989         } else {
2990             $raw .= "[IPSET $ipset]\n\n";
2991         }
2992         my $options = $fw_conf->{ipset}->{$ipset};
2993
2994         my $nethash = {};
2995         foreach my $entry (@$options) {
2996             $nethash->{$entry->{cidr}} = $entry;
2997         }
2998
2999         foreach my $cidr (sort keys %$nethash) {
3000             my $entry = $nethash->{$cidr};
3001             my $line = $entry->{nomatch} ? '!' : '';
3002             $line .= $entry->{cidr};
3003             $line .= " # " . encode('utf8', $entry->{comment})
3004                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3005             $raw .= "$line\n";
3006         }
3007
3008         $raw .= "\n";
3009     }
3010
3011     return $raw;
3012 };
3013
3014 sub save_vmfw_conf {
3015     my ($vmid, $vmfw_conf) = @_;
3016
3017     my $raw = '';
3018
3019     my $options = $vmfw_conf->{options};
3020     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3021
3022     my $aliases = $vmfw_conf->{aliases};
3023     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3024
3025     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3026
3027     my $rules = $vmfw_conf->{rules} || [];
3028     if ($rules && scalar(@$rules)) {
3029         $raw .= "[RULES]\n\n";
3030         $raw .= &$format_rules($rules, 1);
3031         $raw .= "\n";
3032     }
3033
3034     my $filename = "$pvefw_conf_dir/$vmid.fw";
3035     if ($raw) {
3036         mkdir $pvefw_conf_dir;
3037         PVE::Tools::file_set_contents($filename, $raw);
3038     } else {
3039         unlink $filename;
3040     }
3041 }
3042
3043 sub remove_vmfw_conf {
3044     my ($vmid) = @_;
3045
3046     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3047
3048     unlink $vmfw_conffile;
3049 }
3050
3051 sub clone_vmfw_conf {
3052     my ($vmid, $newid) = @_;
3053
3054     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3055     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3056
3057     if (-f $clonevm_conffile) {
3058         unlink $clonevm_conffile;
3059     }
3060     if (-f $sourcevm_conffile) {
3061         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3062         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3063     }
3064 }
3065
3066 sub read_vm_firewall_configs {
3067     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3068
3069     my $vmfw_configs = {};
3070
3071     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3072         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3073         next if !$vmfw_conf->{options}; # skip if file does not exists
3074         $vmfw_configs->{$vmid} = $vmfw_conf;
3075     }
3076     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3077         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3078         next if !$vmfw_conf->{options}; # skip if file does not exists
3079         $vmfw_configs->{$vmid} = $vmfw_conf;
3080     }
3081
3082     return $vmfw_configs;
3083 }
3084
3085 sub get_option_log_level {
3086     my ($options, $k) = @_;
3087
3088     my $v = $options->{$k};
3089     $v = $default_log_level if !defined($v);
3090
3091     return undef if $v eq '' || $v eq 'nolog';
3092
3093     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3094
3095     return $v if ($v >= 0) && ($v <= 7);
3096
3097     warn "unknown log level ($k = '$v')\n";
3098
3099     return undef;
3100 }
3101
3102 sub generate_std_chains {
3103     my ($ruleset, $options, $ipversion) = @_;
3104
3105     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3106
3107     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3108
3109     my $chain;
3110
3111     if ($ipversion == 4) {
3112         # same as shorewall smurflog.
3113         $chain = 'PVEFW-smurflog';
3114         $std_chains->{$chain} = [];
3115
3116         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3117         push @{$std_chains->{$chain}}, "-j DROP";
3118     }
3119
3120     # same as shorewall logflags action.
3121     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3122     $chain = 'PVEFW-logflags';
3123     $std_chains->{$chain} = [];
3124
3125     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3126     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3127     push @{$std_chains->{$chain}}, "-j DROP";
3128
3129     foreach my $chain (keys %$std_chains) {
3130         ruleset_create_chain($ruleset, $chain);
3131         foreach my $rule (@{$std_chains->{$chain}}) {
3132             if (ref($rule)) {
3133                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3134             } else {
3135                 ruleset_addrule($ruleset, $chain, $rule);
3136             }
3137         }
3138     }
3139 }
3140
3141 sub generate_ipset_chains {
3142     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3143
3144     foreach my $ipset (keys %{$ipsets}) {
3145
3146         my $options = $ipsets->{$ipset};
3147
3148         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3149             if (my $ips = $device_ips->{$1}) {
3150                 $options = [@$options, @$ips];
3151             }
3152         }
3153
3154         # remove duplicates
3155         my $nethash = {};
3156         foreach my $entry (@$options) {
3157             next if $entry->{errors}; # skip entries with errors
3158             eval {
3159                 my ($cidr, $ver);
3160                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3161                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3162                 } else {
3163                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3164                 }
3165                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3166                 if ($ver == 6) {
3167                     # ip_compress_address takes an address only, no CIDR
3168                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3169                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3170                     $cidr .= $prefix_len if defined($prefix_len);
3171                     $cidr =~ s|/128$||;
3172                 } else {
3173                     $cidr =~ s|/32$||;
3174                 }
3175
3176                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3177             };
3178             warn $@ if $@;
3179         }
3180
3181         foreach my $ipversion (4, 6) {
3182             my $data = $nethash->{$ipversion};
3183
3184             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3185
3186             my $hashsize = scalar(@$options);
3187             if ($hashsize <= 64) {
3188                 $hashsize = 64;
3189             } else {
3190                 $hashsize = round_powerof2($hashsize);
3191             }
3192
3193             my $family = $ipversion == "6" ? "inet6" : "inet";
3194
3195             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3196
3197             foreach my $cidr (sort keys %$data) {
3198                 my $entry = $data->{$cidr};
3199
3200                 my $cmd = "add $name $cidr";
3201                 if ($entry->{nomatch}) {
3202                     if ($feature_ipset_nomatch) {
3203                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3204                     } else {
3205                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3206                     }
3207                 } else {
3208                     push @{$ipset_ruleset->{$name}}, $cmd;
3209                 }
3210             }
3211         }
3212     }
3213 }
3214
3215 sub round_powerof2 {
3216     my ($int) = @_;
3217
3218     $int--;
3219     $int |= $int >> $_ foreach (1,2,4,8,16);
3220     return ++$int;
3221 }
3222
3223 sub load_clusterfw_conf {
3224     my ($filename, $verbose) = @_;
3225
3226     $filename = $clusterfw_conf_filename if !defined($filename);
3227
3228     my $cluster_conf = {};
3229     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3230         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3231     }
3232
3233     return $cluster_conf;
3234 }
3235
3236 sub save_clusterfw_conf {
3237     my ($cluster_conf) = @_;
3238
3239     my $raw = '';
3240
3241     my $options = $cluster_conf->{options};
3242     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3243
3244     my $aliases = $cluster_conf->{aliases};
3245     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3246
3247     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3248
3249     my $rules = $cluster_conf->{rules};
3250     if ($rules && scalar(@$rules)) {
3251         $raw .= "[RULES]\n\n";
3252         $raw .= &$format_rules($rules, 1);
3253         $raw .= "\n";
3254     }
3255
3256     if ($cluster_conf->{groups}) {
3257         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3258             my $rules = $cluster_conf->{groups}->{$group};
3259             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3260                 my $utf8comment = encode('utf8', $comment);
3261                 $raw .= "[group $group] # $utf8comment\n\n";
3262             } else {
3263                 $raw .= "[group $group]\n\n";
3264             }
3265
3266             $raw .= &$format_rules($rules, 0);
3267             $raw .= "\n";
3268         }
3269     }
3270
3271     if ($raw) {
3272         mkdir $pvefw_conf_dir;
3273         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3274     } else {
3275         unlink $clusterfw_conf_filename;
3276     }
3277 }
3278
3279 sub load_hostfw_conf {
3280     my ($cluster_conf, $filename, $verbose) = @_;
3281
3282     $filename = $hostfw_conf_filename if !defined($filename);
3283
3284     my $hostfw_conf = {};
3285     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3286         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3287     }
3288     return $hostfw_conf;
3289 }
3290
3291 sub save_hostfw_conf {
3292     my ($hostfw_conf) = @_;
3293
3294     my $raw = '';
3295
3296     my $options = $hostfw_conf->{options};
3297     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3298
3299     my $rules = $hostfw_conf->{rules};
3300     if ($rules && scalar(@$rules)) {
3301         $raw .= "[RULES]\n\n";
3302         $raw .= &$format_rules($rules, 1);
3303         $raw .= "\n";
3304     }
3305
3306     if ($raw) {
3307         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3308     } else {
3309         unlink $hostfw_conf_filename;
3310     }
3311 }
3312
3313 sub compile {
3314     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3315
3316     my $vmfw_configs;
3317
3318     if ($vmdata) { # test mode
3319         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3320         my $filename = "$testdir/cluster.fw";
3321         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3322
3323         $filename = "$testdir/host.fw";
3324         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3325
3326         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3327     } else { # normal operation
3328         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3329
3330         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3331
3332         $vmdata = read_local_vm_config();
3333         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3334     }
3335
3336     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3337
3338     my $localnet;
3339     if ($cluster_conf->{aliases}->{local_network}) {
3340         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3341     } else {
3342         my $localnet_ver;
3343         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3344
3345         $cluster_conf->{aliases}->{local_network} = {
3346             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3347     }
3348
3349     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3350
3351     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3352     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3353     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3354
3355     return ($ruleset, $ipset_ruleset, $rulesetv6);
3356 }
3357
3358 sub compile_iptables_filter {
3359     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3360
3361     my $ruleset = {};
3362
3363     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3364     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3365
3366     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3367
3368     my $hostfw_options = $hostfw_conf->{options} || {};
3369
3370     # fixme: what log level should we use here?
3371     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3372
3373     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3374
3375     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3376     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3377
3378     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3379
3380     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3381     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3382
3383     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3384
3385     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3386
3387     if ($hostfw_enable) {
3388         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3389         warn $@ if $@; # just to be sure - should not happen
3390     }
3391
3392     # generate firewall rules for QEMU VMs
3393     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3394         eval {
3395             my $conf = $vmdata->{qemu}->{$vmid};
3396             my $vmfw_conf = $vmfw_configs->{$vmid};
3397             return if !$vmfw_conf;
3398
3399             foreach my $netid (sort keys %$conf) {
3400                 next if $netid !~ m/^net(\d+)$/;
3401                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3402                 next if !$net->{firewall};
3403                 my $iface = "tap${vmid}i$1";
3404
3405                 my $macaddr = $net->{macaddr};
3406                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3407                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3408                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3409                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3410             }
3411         };
3412         warn $@ if $@; # just to be sure - should not happen
3413     }
3414
3415     # generate firewall rules for LXC containers
3416     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3417         eval {
3418             my $conf = $vmdata->{lxc}->{$vmid};
3419             my $vmfw_conf = $vmfw_configs->{$vmid};
3420             return if !$vmfw_conf;
3421
3422             if ($vmfw_conf->{options}->{enable}) {
3423                 foreach my $netid (sort keys %$conf) {
3424                     next if $netid !~ m/^net(\d+)$/;
3425                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3426                     next if !$net->{firewall};
3427                     my $iface = "veth${vmid}i$1";
3428                     my $macaddr = $net->{hwaddr};
3429                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3430                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3431                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3432                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3433                 }
3434             }
3435         };
3436         warn $@ if $@; # just to be sure - should not happen
3437     }
3438
3439     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3440         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3441     }
3442
3443     return $ruleset;
3444 }
3445
3446 sub mac_to_linklocal {
3447     my ($macaddr) = @_;
3448     my @parts = split(/:/, $macaddr);
3449     # The standard link local address uses the fe80::/64 prefix with the
3450     # modified EUI-64 identifier derived from the MAC address by flipping the
3451     # universal/local bit and inserting FF:FE in the middle.
3452     # See RFC 4291.
3453     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3454     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3455     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3456 }
3457
3458 sub compile_ipsets {
3459     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3460
3461     my $localnet;
3462     if ($cluster_conf->{aliases}->{local_network}) {
3463         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3464     } else {
3465         my $localnet_ver;
3466         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3467
3468         $cluster_conf->{aliases}->{local_network} = {
3469             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3470     }
3471
3472     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3473
3474
3475     my $ipset_ruleset = {};
3476
3477     # generate ipsets for QEMU VMs
3478     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3479         eval {
3480             my $conf = $vmdata->{qemu}->{$vmid};
3481             my $vmfw_conf = $vmfw_configs->{$vmid};
3482             return if !$vmfw_conf;
3483
3484             # When the 'ipfilter' option is enabled every device for which there
3485             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3486             # ipset.
3487             # The reason is that ipfilter ipsets are always filled with standard
3488             # IPv6 link-local filters.
3489             my $ipsets = $vmfw_conf->{ipset};
3490             my $implicit_sets = {};
3491
3492             my $device_ips = {};
3493             foreach my $netid (keys %$conf) {
3494                 next if $netid !~ m/^net(\d+)$/;
3495                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3496                 next if !$net->{firewall};
3497
3498                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3499                     $implicit_sets->{"ipfilter-$netid"} = [];
3500                 }
3501
3502                 my $macaddr = $net->{macaddr};
3503                 my $linklocal = mac_to_linklocal($macaddr);
3504                 $device_ips->{$netid} = [
3505                     { cidr => $linklocal },
3506                     { cidr => 'fe80::/10', nomatch => 1 }
3507                 ];
3508             }
3509
3510             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3511             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3512         };
3513         warn $@ if $@; # just to be sure - should not happen
3514     }
3515
3516     # generate firewall rules for LXC containers
3517     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3518         eval {
3519             my $conf = $vmdata->{lxc}->{$vmid};
3520             my $vmfw_conf = $vmfw_configs->{$vmid};
3521             return if !$vmfw_conf;
3522
3523             # When the 'ipfilter' option is enabled every device for which there
3524             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3525             # ipset.
3526             # The reason is that ipfilter ipsets are always filled with standard
3527             # IPv6 link-local filters, as well as the IP addresses configured
3528             # for the container.
3529             my $ipsets = $vmfw_conf->{ipset};
3530             my $implicit_sets = {};
3531
3532             my $device_ips = {};
3533             foreach my $netid (keys %$conf) {
3534                 next if $netid !~ m/^net(\d+)$/;
3535                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3536                 next if !$net->{firewall};
3537
3538                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3539                     $implicit_sets->{"ipfilter-$netid"} = [];
3540                 }
3541
3542                 my $macaddr = $net->{hwaddr};
3543                 my $linklocal = mac_to_linklocal($macaddr);
3544                 my $set = $device_ips->{$netid} = [
3545                     { cidr => $linklocal },
3546                     { cidr => 'fe80::/10', nomatch => 1 }
3547                 ];
3548                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3549                     push @$set, { cidr => $1 };
3550                 }
3551                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3552                     push @$set, { cidr => $1 };
3553                 }
3554             }
3555
3556             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3557             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3558         };
3559         warn $@ if $@; # just to be sure - should not happen
3560     }
3561
3562     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3563
3564     return $ipset_ruleset;
3565 }
3566
3567 sub get_ruleset_status {
3568     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3569
3570     my $statushash = {};
3571
3572     foreach my $chain (sort keys %$ruleset) {
3573         my $sig = &$digest_fn($ruleset->{$chain});
3574
3575         $statushash->{$chain}->{sig} = $sig;
3576
3577         my $oldsig = $active_chains->{$chain};
3578         if (!defined($oldsig)) {
3579             $statushash->{$chain}->{action} = 'create';
3580         } else {
3581             if ($oldsig eq $sig) {
3582                 $statushash->{$chain}->{action} = 'exists';
3583             } else {
3584                 $statushash->{$chain}->{action} = 'update';
3585             }
3586         }
3587         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3588         foreach my $cmd (@{$ruleset->{$chain}}) {
3589             print "\t$cmd\n" if $verbose;
3590         }
3591     }
3592
3593     foreach my $chain (sort keys %$active_chains) {
3594         if (!defined($ruleset->{$chain})) {
3595             my $sig = $active_chains->{$chain};
3596             $statushash->{$chain}->{action} = 'delete';
3597             $statushash->{$chain}->{sig} = $sig;
3598             print "delete $chain ($sig)\n" if $verbose;
3599         }
3600     }
3601
3602     return $statushash;
3603 }
3604
3605 sub print_sig_rule {
3606     my ($chain, $sig) = @_;
3607
3608     # We just use this to store a SHA1 checksum used to detect changes
3609     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3610 }
3611
3612 sub get_ruleset_cmdlist {
3613     my ($ruleset, $verbose, $iptablescmd) = @_;
3614
3615     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3616
3617     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3618     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3619
3620     # create missing chains first
3621     foreach my $chain (sort keys %$ruleset) {
3622         my $stat = $statushash->{$chain};
3623         die "internal error" if !$stat;
3624         next if $stat->{action} ne 'create';
3625
3626         $cmdlist .= ":$chain - [0:0]\n";
3627     }
3628
3629     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3630         my $chain = "PVEFW-$h";
3631         if ($ruleset->{$chain} && !$hooks->{$h}) {
3632             $cmdlist .= "-A $h -j $chain\n";
3633         }
3634     }
3635
3636     foreach my $chain (sort keys %$ruleset) {
3637         my $stat = $statushash->{$chain};
3638         die "internal error" if !$stat;
3639
3640         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3641             $cmdlist .= "-F $chain\n";
3642             foreach my $cmd (@{$ruleset->{$chain}}) {
3643                 $cmdlist .= "$cmd\n";
3644             }
3645             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3646         } elsif ($stat->{action} eq 'delete') {
3647             die "internal error"; # this should not happen
3648         } elsif ($stat->{action} eq 'exists') {
3649             # do nothing
3650         } else {
3651             die "internal error - unknown status '$stat->{action}'";
3652         }
3653     }
3654
3655     foreach my $chain (keys %$statushash) {
3656         next if $statushash->{$chain}->{action} ne 'delete';
3657         $cmdlist .= "-F $chain\n";
3658     }
3659     foreach my $chain (keys %$statushash) {
3660         next if $statushash->{$chain}->{action} ne 'delete';
3661         next if $chain eq 'PVEFW-INPUT';
3662         next if $chain eq 'PVEFW-OUTPUT';
3663         next if $chain eq 'PVEFW-FORWARD';
3664         $cmdlist .= "-X $chain\n";
3665     }
3666
3667     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3668
3669     $cmdlist .= "COMMIT\n";
3670
3671     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3672 }
3673
3674 sub get_ipset_cmdlist {
3675     my ($ruleset, $verbose) = @_;
3676
3677     my $cmdlist = "";
3678
3679     my $delete_cmdlist = "";
3680
3681     my $active_chains = ipset_get_chains();
3682     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3683
3684     # remove stale _swap chains
3685     foreach my $chain (keys %$active_chains) {
3686         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3687             $cmdlist .= "destroy $chain\n";
3688         }
3689     }
3690
3691     foreach my $chain (keys %$ruleset) {
3692         my $stat = $statushash->{$chain};
3693         die "internal error" if !$stat;
3694
3695         if ($stat->{action} eq 'create') {
3696             foreach my $cmd (@{$ruleset->{$chain}}) {
3697                 $cmdlist .= "$cmd\n";
3698             }
3699         }
3700     }
3701
3702     foreach my $chain (keys %$ruleset) {
3703         my $stat = $statushash->{$chain};
3704         die "internal error" if !$stat;
3705
3706         if ($stat->{action} eq 'update') {
3707             my $chain_swap = $chain."_swap";
3708
3709             foreach my $cmd (@{$ruleset->{$chain}}) {
3710                 $cmd =~ s/$chain/$chain_swap/;
3711                 $cmdlist .= "$cmd\n";
3712             }
3713             $cmdlist .= "swap $chain_swap $chain\n";
3714             $cmdlist .= "flush $chain_swap\n";
3715             $cmdlist .= "destroy $chain_swap\n";
3716         }
3717     }
3718
3719      # the remove unused chains
3720     foreach my $chain (keys %$statushash) {
3721         next if $statushash->{$chain}->{action} ne 'delete';
3722
3723         $delete_cmdlist .= "flush $chain\n";
3724         $delete_cmdlist .= "destroy $chain\n";
3725     }
3726
3727     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3728
3729     return ($cmdlist, $delete_cmdlist, $changes);
3730 }
3731
3732 sub apply_ruleset {
3733     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3734
3735     enable_bridge_firewall();
3736
3737     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3738         get_ipset_cmdlist($ipset_ruleset, $verbose);
3739
3740     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3741     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3742
3743     if ($verbose) {
3744         if ($ipset_changes) {
3745             print "ipset changes:\n";
3746             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3747             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3748         }
3749
3750         if ($changes) {
3751             print "iptables changes:\n";
3752             print $cmdlist;
3753         }
3754
3755         if ($changesv6) {
3756             print "ip6tables changes:\n";
3757             print $cmdlistv6;
3758         }
3759     }
3760
3761     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3762     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3763
3764     ipset_restore_cmdlist($ipset_create_cmdlist);
3765
3766     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3767     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3768
3769     iptables_restore_cmdlist($cmdlist);
3770
3771     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3772     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3773
3774     ip6tables_restore_cmdlist($cmdlistv6);
3775
3776     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3777     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3778
3779     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3780
3781     # test: re-read status and check if everything is up to date
3782     my $active_chains = iptables_get_chains();
3783     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3784
3785     my $errors;
3786     foreach my $chain (sort keys %$ruleset) {
3787         my $stat = $statushash->{$chain};
3788         if ($stat->{action} ne 'exists') {
3789             warn "unable to update chain '$chain'\n";
3790             $errors = 1;
3791         }
3792     }
3793
3794     my $active_chainsv6 = iptables_get_chains("ip6tables");
3795     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3796
3797     foreach my $chain (sort keys %$rulesetv6) {
3798         my $stat = $statushashv6->{$chain};
3799         if ($stat->{action} ne 'exists') {
3800             warn "unable to update chain '$chain'\n";
3801             $errors = 1;
3802         }
3803     }
3804
3805     die "unable to apply firewall changes\n" if $errors;
3806
3807     update_nf_conntrack_max($hostfw_conf);
3808
3809     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3810
3811 }
3812
3813 sub update_nf_conntrack_max {
3814     my ($hostfw_conf) = @_;
3815
3816     my $max = 65536; # reasonable default
3817
3818     my $options = $hostfw_conf->{options} || {};
3819
3820     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3821         $max = $options->{nf_conntrack_max};
3822         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3823     }
3824
3825     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3826     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3827
3828     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3829
3830     if ($current != $max) {
3831         my $hashsize = int($max/4);
3832         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3833         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3834     }
3835 }
3836
3837 sub update_nf_conntrack_tcp_timeout_established {
3838     my ($hostfw_conf) = @_;
3839
3840     my $options = $hostfw_conf->{options} || {};
3841
3842     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3843
3844     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3845 }
3846
3847 sub remove_pvefw_chains {
3848
3849     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3850     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3851     PVE::Firewall::remove_pvefw_chains_ipset();
3852
3853 }
3854
3855 sub remove_pvefw_chains_iptables {
3856     my ($iptablescmd) = @_;
3857
3858     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3859     my $cmdlist = "*filter\n";
3860
3861     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3862         if ($hooks->{$h}) {
3863             $cmdlist .= "-D $h -j PVEFW-$h\n";
3864         }
3865     }
3866
3867     foreach my $chain (keys %$chash) {
3868         $cmdlist .= "-F $chain\n";
3869     }
3870
3871     foreach my $chain (keys %$chash) {
3872         $cmdlist .= "-X $chain\n";
3873     }
3874     $cmdlist .= "COMMIT\n";
3875
3876     if($iptablescmd eq "ip6tables") {
3877         ip6tables_restore_cmdlist($cmdlist);
3878     } else {
3879         iptables_restore_cmdlist($cmdlist);
3880     }
3881 }
3882
3883 sub remove_pvefw_chains_ipset {
3884
3885     my $ipset_chains = ipset_get_chains();
3886
3887     my $cmdlist = "";
3888
3889     foreach my $chain (keys %$ipset_chains) {
3890         $cmdlist .= "flush $chain\n";
3891         $cmdlist .= "destroy $chain\n";
3892     }
3893
3894     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3895 }
3896
3897 sub init {
3898     my $cluster_conf = load_clusterfw_conf();
3899     my $cluster_options = $cluster_conf->{options};
3900     my $enable = $cluster_options->{enable};
3901
3902     return if !$enable;
3903
3904     # load required modules here
3905 }
3906
3907 sub update {
3908     my $code = sub {
3909
3910         my $cluster_conf = load_clusterfw_conf();
3911         my $cluster_options = $cluster_conf->{options};
3912
3913         if (!$cluster_options->{enable}) {
3914             PVE::Firewall::remove_pvefw_chains();
3915             return;
3916         }
3917
3918         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3919
3920         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3921
3922         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3923     };
3924
3925     run_locked($code);
3926 }
3927
3928 1;