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             } else {
 915                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 916                 next if !defined($mask);
 917             }
 918             my $cidr = "$entry->{dest}/$mask";
 919             my $testnet = Net::IP->new($cidr);
 920             if ($testnet->overlaps($testip) == $Net::IP::IP_B_IN_A_OVERLAP) {
 921                 $__local_network = $cidr;
 922                 return;
 923             }
 924         }
 925     };
 926     warn $@ if $@;
 927
 928     return $__local_network;
 929 }
 930
 931 # ipset names are limited to 31 characters,
 932 # and we use '-v4' or '-v6' to indicate IP versions,
 933 # and we use '_swap' suffix for atomic update,
 934 # for example PVEFW-${VMID}-${ipset_name}_swap
 935
 936 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 937
 938 sub compute_ipset_chain_name {
 939     my ($vmid, $ipset_name, $ipversion) = @_;
 940
 941     $vmid = 0 if !defined($vmid);
 942
 943     my $id = "$vmid-${ipset_name}-v$ipversion";
 944
 945     if (length($id) > $max_iptables_ipset_name_length) {
 946         $id = PVE::Tools::fnv31a_hex($id);
 947     }
 948
 949     return "PVEFW-$id";
 950 }
 951
 952 sub compute_ipfilter_ipset_name {
 953     my ($iface) = @_;
 954
 955     return "ipfilter-$iface";
 956 }
 957
 958 sub parse_address_list {
 959     my ($str) = @_;
 960
 961     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 962         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 963         return;
 964     }
 965
 966     if ($str =~ m/^${ip_alias_pattern}$/) {
 967         die "alias name too long\n" if length($str) > $max_alias_name_length;
 968         return;
 969     }
 970
 971     my $count = 0;
 972     my $iprange = 0;
 973     my $ipversion;
 974
 975     foreach my $elem (split(/,/, $str)) {
 976         $count++;
 977         my $ip = Net::IP->new($elem);
 978         if (!$ip) {
 979             my $err = Net::IP::Error();
 980             die "invalid IP address: $err\n";
 981         }
 982         $iprange = 1 if $elem =~ m/-/;
 983
 984         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
 985
 986         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
 987             if $ipversion && ($new_ipversion != $ipversion);
 988
 989         $ipversion = $new_ipversion;
 990     }
 991
 992     die "you can't use a range in a list\n" if $iprange && $count > 1;
 993
 994     return $ipversion;
 995 }
 996
 997 sub parse_port_name_number_or_range {
 998     my ($str, $dport) = @_;
 999
1000     my $services = PVE::Firewall::get_etc_services();
1001     my $count = 0;
1002     my $icmp_port = 0;
1003
1004     foreach my $item (split(/,/, $str)) {
1005         $count++;
1006         if ($item =~ m/^(\d+):(\d+)$/) {
1007             my ($port1, $port2) = ($1, $2);
1008             die "invalid port '$port1'\n" if $port1 > 65535;
1009             die "invalid port '$port2'\n" if $port2 > 65535;
1010         } elsif ($item =~ m/^(\d+)$/) {
1011             my $port = $1;
1012             die "invalid port '$port'\n" if $port > 65535;
1013         } else {
1014             if ($dport && $icmp_type_names->{$item}) {
1015                 $icmp_port = 1;
1016             } elsif ($dport && $icmpv6_type_names->{$item}) {
1017                 $icmp_port = 1;
1018             } else {
1019                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1020             }
1021         }
1022     }
1023
1024     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 1;
1025
1026     return $count;
1027 }
1028
1029 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1030 sub pve_fw_verify_sport_spec {
1031    my ($portstr) = @_;
1032
1033    parse_port_name_number_or_range($portstr, 0);
1034
1035    return $portstr;
1036 }
1037
1038 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1039 sub pve_fw_verify_dport_spec {
1040    my ($portstr) = @_;
1041
1042    parse_port_name_number_or_range($portstr, 1);
1043
1044    return $portstr;
1045 }
1046
1047 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1048 sub pve_fw_verify_addr_spec {
1049    my ($list) = @_;
1050
1051    parse_address_list($list);
1052
1053    return $list;
1054 }
1055
1056 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1057 sub pve_fw_verify_protocol_spec {
1058    my ($proto) = @_;
1059
1060    my $protocols = get_etc_protocols();
1061
1062    die "unknown protocol '$proto'\n" if $proto &&
1063        !(defined($protocols->{byname}->{$proto}) ||
1064          defined($protocols->{byid}->{$proto}));
1065
1066    return $proto;
1067 }
1068
1069
1070 # helper function for API
1071
1072 sub copy_opject_with_digest {
1073     my ($object) = @_;
1074
1075     my $sha = Digest::SHA->new('sha1');
1076
1077     my $res = {};
1078     foreach my $k (sort keys %$object) {
1079         my $v = $object->{$k};
1080         next if !defined($v);
1081         $res->{$k} = $v;
1082         $sha->add($k, ':', $v, "\n");
1083     }
1084
1085     my $digest = $sha->hexdigest;
1086
1087     $res->{digest} = $digest;
1088
1089     return wantarray ? ($res, $digest) : $res;
1090 }
1091
1092 sub copy_list_with_digest {
1093     my ($list) = @_;
1094
1095     my $sha = Digest::SHA->new('sha1');
1096
1097     my $res = [];
1098     foreach my $entry (@$list) {
1099         my $data = {};
1100         foreach my $k (sort keys %$entry) {
1101             my $v = $entry->{$k};
1102             next if !defined($v);
1103             $data->{$k} = $v;
1104             # Note: digest ignores refs ($rule->{errors})
1105             # since Digest::SHA expects a series of bytes,
1106             #  we have to encode the value here to prevent errors when
1107             #  using utf8 characters (eg. in comments)
1108             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1109         }
1110         push @$res, $data;
1111     }
1112
1113     my $digest = $sha->hexdigest;
1114
1115     foreach my $entry (@$res) {
1116         $entry->{digest} = $digest;
1117     }
1118
1119     return wantarray ? ($res, $digest) : $res;
1120 }
1121
1122 our $cluster_option_properties = {
1123     enable => {
1124         description => "Enable or disable the firewall cluster wide.",
1125         type => 'integer',
1126         minimum => 0,
1127         optional => 1,
1128     },
1129     policy_in => {
1130         description => "Input policy.",
1131         type => 'string',
1132         optional => 1,
1133         enum => ['ACCEPT', 'REJECT', 'DROP'],
1134     },
1135     policy_out => {
1136         description => "Output policy.",
1137         type => 'string',
1138         optional => 1,
1139         enum => ['ACCEPT', 'REJECT', 'DROP'],
1140     },
1141 };
1142
1143 our $host_option_properties = {
1144     enable => {
1145         description => "Enable host firewall rules.",
1146         type => 'boolean',
1147         optional => 1,
1148     },
1149     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1150         description => "Log level for incoming traffic." }),
1151     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1152         description => "Log level for outgoing traffic." }),
1153     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1154         description => "Log level for illegal tcp flags filter." }),
1155     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1156         description => "Log level for SMURFS filter." }),
1157     nosmurfs => {
1158         description => "Enable SMURFS filter.",
1159         type => 'boolean',
1160         optional => 1,
1161     },
1162     tcpflags => {
1163         description => "Filter illegal combinations of TCP flags.",
1164         type => 'boolean',
1165         optional => 1,
1166     },
1167     nf_conntrack_max => {
1168         description => "Maximum number of tracked connections.",
1169         type => 'integer',
1170         optional => 1,
1171         minimum => 32768,
1172     },
1173     nf_conntrack_tcp_timeout_established => {
1174         description => "Conntrack established timeout.",
1175         type => 'integer',
1176         optional => 1,
1177         minimum => 7875,
1178     },
1179     ndp => {
1180         description => "Enable NDP.",
1181         type => 'boolean',
1182         optional => 1,
1183     },
1184 };
1185
1186 our $vm_option_properties = {
1187     enable => {
1188         description => "Enable/disable firewall rules.",
1189         type => 'boolean',
1190         optional => 1,
1191     },
1192     macfilter => {
1193         description => "Enable/disable MAC address filter.",
1194         type => 'boolean',
1195         optional => 1,
1196     },
1197     dhcp => {
1198         description => "Enable DHCP.",
1199         type => 'boolean',
1200         optional => 1,
1201     },
1202     ndp => {
1203         description => "Enable NDP.",
1204         type => 'boolean',
1205         optional => 1,
1206     },
1207     radv => {
1208         description => "Allow sending Router Advertisement.",
1209         type => 'boolean',
1210         optional => 1,
1211     },
1212     ipfilter => {
1213         description => "Enable default IP filters. " .
1214            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1215            "for every interface. Such ipsets implicitly contain sane default " .
1216            "restrictions such as restricting IPv6 link local addresses to " .
1217            "the one derived from the interface's MAC address. For containers " .
1218            "the configured IP addresses will be implicitly added.",
1219         type => 'boolean',
1220         optional => 1,
1221     },
1222     policy_in => {
1223         description => "Input policy.",
1224         type => 'string',
1225         optional => 1,
1226         enum => ['ACCEPT', 'REJECT', 'DROP'],
1227     },
1228     policy_out => {
1229         description => "Output policy.",
1230         type => 'string',
1231         optional => 1,
1232         enum => ['ACCEPT', 'REJECT', 'DROP'],
1233     },
1234     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1235         description => "Log level for incoming traffic." }),
1236     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1237         description => "Log level for outgoing traffic." }),
1238
1239 };
1240
1241
1242 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.";
1243
1244 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.";
1245
1246 my $rule_properties = {
1247     pos => {
1248         description => "Update rule at position <pos>.",
1249         type => 'integer',
1250         minimum => 0,
1251         optional => 1,
1252     },
1253     digest => get_standard_option('pve-config-digest'),
1254     type => {
1255         description => "Rule type.",
1256         type => 'string',
1257         optional => 1,
1258         enum => ['in', 'out', 'group'],
1259     },
1260     action => {
1261         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1262         type => 'string',
1263         optional => 1,
1264         pattern => $security_group_name_pattern,
1265         maxLength => 20,
1266         minLength => 2,
1267     },
1268     macro => {
1269         description => "Use predefined standard macro.",
1270         type => 'string',
1271         optional => 1,
1272         maxLength => 128,
1273     },
1274     iface => get_standard_option('pve-iface', {
1275         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.",
1276         optional => 1
1277     }),
1278     source => {
1279         description => "Restrict packet source address. $addr_list_descr",
1280         type => 'string', format => 'pve-fw-addr-spec',
1281         optional => 1,
1282     },
1283     dest => {
1284         description => "Restrict packet destination address. $addr_list_descr",
1285         type => 'string', format => 'pve-fw-addr-spec',
1286         optional => 1,
1287     },
1288     proto => {
1289         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1290         type => 'string', format => 'pve-fw-protocol-spec',
1291         optional => 1,
1292     },
1293     enable => {
1294         description => "Flag to enable/disable a rule.",
1295         type => 'integer',
1296         minimum => 0,
1297         optional => 1,
1298     },
1299     sport => {
1300         description => "Restrict TCP/UDP source port. $port_descr",
1301         type => 'string', format => 'pve-fw-sport-spec',
1302         optional => 1,
1303     },
1304     dport => {
1305         description => "Restrict TCP/UDP destination port. $port_descr",
1306         type => 'string', format => 'pve-fw-dport-spec',
1307         optional => 1,
1308     },
1309     comment => {
1310         description => "Descriptive comment.",
1311         type => 'string',
1312         optional => 1,
1313     },
1314 };
1315
1316 sub add_rule_properties {
1317     my ($properties) = @_;
1318
1319     foreach my $k (keys %$rule_properties) {
1320         my $h = $rule_properties->{$k};
1321         # copy data, so that we can modify later without side effects
1322         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1323     }
1324
1325     return $properties;
1326 }
1327
1328 sub delete_rule_properties {
1329     my ($rule, $delete_str) = @_;
1330
1331     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1332         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1333             if !defined($rule_properties->{$opt});
1334         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1335             if $opt eq 'type' || $opt eq 'action';
1336         delete $rule->{$opt};
1337     }
1338
1339     return $rule;
1340 }
1341
1342 my $apply_macro = sub {
1343     my ($macro_name, $param, $verify, $ipversion) = @_;
1344
1345     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1346     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1347
1348     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1349         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1350     }
1351
1352     # skip macros which are specific to another ipversion
1353     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1354         return if $ipversion != $required;
1355     }
1356
1357     my $rules = [];
1358
1359     foreach my $templ (@$macro_rules) {
1360         my $rule = {};
1361         my $param_used = {};
1362         foreach my $k (keys %$templ) {
1363             my $v = $templ->{$k};
1364             if ($v eq 'PARAM') {
1365                 $v = $param->{$k};
1366                 $param_used->{$k} = 1;
1367             } elsif ($v eq 'DEST') {
1368                 $v = $param->{dest};
1369                 $param_used->{dest} = 1;
1370             } elsif ($v eq 'SOURCE') {
1371                 $v = $param->{source};
1372                 $param_used->{source} = 1;
1373             }
1374
1375             if (!defined($v)) {
1376                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1377                 raise_param_exc({ macro => $msg }) if $verify;
1378                 die "$msg\n";
1379             }
1380             $rule->{$k} = $v;
1381         }
1382         foreach my $k (keys %$param) {
1383             next if $k eq 'macro';
1384             next if !defined($param->{$k});
1385             next if $param_used->{$k};
1386             if (defined($rule->{$k})) {
1387                 if ($rule->{$k} ne $param->{$k}) {
1388                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1389                     raise_param_exc({ $k => $msg }) if $verify;
1390                     die "$msg\n";
1391                 }
1392             } else {
1393                 $rule->{$k} = $param->{$k};
1394             }
1395         }
1396         push @$rules, $rule;
1397     }
1398
1399     return $rules;
1400 };
1401
1402 my $rule_env_iface_lookup = {
1403     'ct' => 1,
1404     'vm' => 1,
1405     'group' => 0,
1406     'cluster' => 1,
1407     'host' => 1,
1408 };
1409
1410 sub verify_rule {
1411     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1412
1413     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1414
1415     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1416     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1417
1418     my $errors = $rule->{errors} || {};
1419
1420     my $error_count = 0;
1421
1422     my $add_error = sub {
1423         my ($param, $msg)  = @_;
1424         chomp $msg;
1425         raise_param_exc({ $param => $msg }) if !$noerr;
1426         $error_count++;
1427         $errors->{$param} = $msg if !$errors->{$param};
1428     };
1429
1430     my $ipversion;
1431     my $set_ip_version = sub {
1432         my $vers = shift;
1433         if ($vers) {
1434             die "detected mixed ipv4/ipv6 adresses in rule\n"
1435                 if $ipversion && ($vers != $ipversion);
1436             $ipversion = $vers;
1437         }
1438     };
1439
1440     my $check_ipset_or_alias_property = sub {
1441         my ($name, $expected_ipversion) = @_;
1442
1443         if (my $value = $rule->{$name}) {
1444             if ($value =~ m/^\+/) {
1445                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1446                     &$add_error($name, "no such ipset '$1'")
1447                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1448
1449                 } else {
1450                     &$add_error($name, "invalid ipset name '$value'");
1451                 }
1452             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1453                 my $alias = lc($value);
1454                 &$add_error($name, "no such alias '$value'")
1455                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1456                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1457                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1458
1459                 &$set_ip_version($e->{ipversion});
1460             }
1461         }
1462     };
1463
1464     my $type = $rule->{type};
1465     my $action = $rule->{action};
1466
1467     &$add_error('type', "missing property") if !$type;
1468     &$add_error('action', "missing property") if !$action;
1469
1470     if ($type) {
1471         if ($type eq  'in' || $type eq 'out') {
1472             &$add_error('action', "unknown action '$action'")
1473                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1474         } elsif ($type eq 'group') {
1475             &$add_error('type', "security groups not allowed")
1476                 if !$allow_groups;
1477             &$add_error('action', "invalid characters in security group name")
1478                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1479         } else {
1480             &$add_error('type', "unknown rule type '$type'");
1481         }
1482     }
1483
1484     if ($rule->{iface}) {
1485         &$add_error('type', "parameter -i not allowed for this rule type")
1486             if !$allow_iface;
1487         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1488         &$add_error('iface', $@) if $@;
1489         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1490             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1491                 if $rule->{iface} !~  m/^net(\d+)$/;
1492         }
1493     }
1494
1495     if ($rule->{macro}) {
1496         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1497             $rule->{macro} = $preferred_name;
1498         } else {
1499             &$add_error('macro', "unknown macro '$rule->{macro}'");
1500         }
1501     }
1502
1503     if ($rule->{proto}) {
1504         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1505         &$add_error('proto', $@) if $@;
1506         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1507         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1508     }
1509
1510     if ($rule->{dport}) {
1511         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1512         &$add_error('dport', $@) if $@;
1513         my $proto = $rule->{proto};
1514         &$add_error('proto', "missing property - 'dport' requires this property")
1515             if !$proto;
1516         &$add_error('dport', "protocol '$proto' does not support ports")
1517             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1518                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1519     }
1520
1521     if ($rule->{sport}) {
1522         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1523         &$add_error('sport', $@) if $@;
1524         my $proto = $rule->{proto};
1525         &$add_error('proto', "missing property - 'sport' requires this property")
1526             if !$proto;
1527         &$add_error('sport', "protocol '$proto' does not support ports")
1528             if !$PROTOCOLS_WITH_PORTS->{$proto};
1529     }
1530
1531     if ($rule->{source}) {
1532         eval {
1533             my $source_ipversion = parse_address_list($rule->{source});
1534             &$set_ip_version($source_ipversion);
1535         };
1536         &$add_error('source', $@) if $@;
1537         &$check_ipset_or_alias_property('source', $ipversion);
1538     }
1539
1540     if ($rule->{dest}) {
1541         eval {
1542             my $dest_ipversion = parse_address_list($rule->{dest});
1543             &$set_ip_version($dest_ipversion);
1544         };
1545         &$add_error('dest', $@) if $@;
1546         &$check_ipset_or_alias_property('dest', $ipversion);
1547     }
1548
1549     $rule->{ipversion} = $ipversion if $ipversion;
1550
1551     if ($rule->{macro} && !$error_count) {
1552         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1553         if (my $err = $@) {
1554             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1555                 my $eh = $err->{errors};
1556                 foreach my $p (keys %$eh) {
1557                     &$add_error($p, $eh->{$p});
1558                 }
1559             } else {
1560                 &$add_error('macro', "$err");
1561             }
1562         }
1563     }
1564
1565     $rule->{errors} = $errors if $error_count;
1566
1567     return $rule;
1568 }
1569
1570 sub copy_rule_data {
1571     my ($rule, $param) = @_;
1572
1573     foreach my $k (keys %$rule_properties) {
1574         if (defined(my $v = $param->{$k})) {
1575             if ($v eq '' || $v eq '-') {
1576                 delete $rule->{$k};
1577             } else {
1578                 $rule->{$k} = $v;
1579             }
1580         }
1581     }
1582
1583     return $rule;
1584 }
1585
1586 sub rules_modify_permissions {
1587     my ($rule_env) = @_;
1588
1589     if ($rule_env eq 'host') {
1590         return {
1591             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1592         };
1593     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1594         return {
1595             check => ['perm', '/', [ 'Sys.Modify' ]],
1596         };
1597     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1598         return {
1599             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1600         }
1601     }
1602
1603     return undef;
1604 }
1605
1606 sub rules_audit_permissions {
1607     my ($rule_env) = @_;
1608
1609     if ($rule_env eq 'host') {
1610         return {
1611             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1612         };
1613     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1614         return {
1615             check => ['perm', '/', [ 'Sys.Audit' ]],
1616         };
1617     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1618         return {
1619             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1620         }
1621     }
1622
1623     return undef;
1624 }
1625
1626 # core functions
1627 my $bridge_firewall_enabled = 0;
1628
1629 sub enable_bridge_firewall {
1630
1631     return if $bridge_firewall_enabled; # only once
1632
1633     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1634     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1635
1636     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1637     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1638
1639     $bridge_firewall_enabled = 1;
1640 }
1641
1642 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
1643
1644 sub iptables_restore_cmdlist {
1645     my ($cmdlist) = @_;
1646
1647     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1648 }
1649
1650 sub ip6tables_restore_cmdlist {
1651     my ($cmdlist) = @_;
1652
1653     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1654 }
1655
1656 sub ipset_restore_cmdlist {
1657     my ($cmdlist) = @_;
1658
1659     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1660 }
1661
1662 sub iptables_get_chains {
1663     my ($iptablescmd) = @_;
1664
1665     $iptablescmd = "iptables" if !$iptablescmd;
1666
1667     my $res = {};
1668
1669     # check what chains we want to track
1670     my $is_pvefw_chain = sub {
1671         my $name = shift;
1672
1673         return 1 if $name =~ m/^PVEFW-\S+$/;
1674
1675         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1676
1677         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1678
1679         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1680         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1681
1682         return undef;
1683     };
1684
1685     my $table = '';
1686
1687     my $hooks = {};
1688
1689     my $parser = sub {
1690         my $line = shift;
1691
1692         return if $line =~ m/^#/;
1693         return if $line =~ m/^\s*$/;
1694
1695         if ($line =~ m/^\*(\S+)$/) {
1696             $table = $1;
1697             return;
1698         }
1699
1700         return if $table ne 'filter';
1701
1702         if ($line =~ m/^:(\S+)\s/) {
1703             my $chain = $1;
1704             return if !&$is_pvefw_chain($chain);
1705             $res->{$chain} = "unknown";
1706         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1707             my ($chain, $sig) = ($1, $2);
1708             return if !&$is_pvefw_chain($chain);
1709             $res->{$chain} = $sig;
1710         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1711             $hooks->{$1} = 1;
1712         } else {
1713             # simply ignore the rest
1714             return;
1715         }
1716     };
1717
1718     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1719
1720     return wantarray ? ($res, $hooks) : $res;
1721 }
1722
1723 sub iptables_chain_digest {
1724     my ($rules) = @_;
1725     my $digest = Digest::SHA->new('sha1');
1726     foreach my $rule (@$rules) { # order is important
1727         $digest->add($rule);
1728     }
1729     return $digest->b64digest;
1730 }
1731
1732 sub ipset_chain_digest {
1733     my ($rules) = @_;
1734
1735     my $digest = Digest::SHA->new('sha1');
1736     foreach my $rule (sort @$rules) { # note: sorted
1737         $digest->add($rule);
1738     }
1739     return $digest->b64digest;
1740 }
1741
1742 sub ipset_get_chains {
1743
1744     my $res = {};
1745     my $chains = {};
1746
1747     my $parser = sub {
1748         my $line = shift;
1749
1750         return if $line =~ m/^#/;
1751         return if $line =~ m/^\s*$/;
1752         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1753             my $chain = $1;
1754             $line =~ s/\s+$//; # delete trailing white space
1755             push @{$chains->{$chain}}, $line;
1756         } else {
1757             # simply ignore the rest
1758             return;
1759         }
1760     };
1761
1762     run_command("/sbin/ipset save", outfunc => $parser);
1763
1764     # compute digest for each chain
1765     foreach my $chain (keys %$chains) {
1766         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1767     }
1768
1769     return $res;
1770 }
1771
1772 sub ruleset_generate_cmdstr {
1773     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1774
1775     return if defined($rule->{enable}) && !$rule->{enable};
1776     return if $rule->{errors};
1777
1778     die "unable to emit macro - internal error" if $rule->{macro}; # should not happen
1779
1780     my $nbdport = defined($rule->{dport}) ? parse_port_name_number_or_range($rule->{dport}, 1) : 0;
1781     my $nbsport = defined($rule->{sport}) ? parse_port_name_number_or_range($rule->{sport}, 0) : 0;
1782
1783     my @cmd = ();
1784
1785     push @cmd, "-i $rule->{iface_in}" if $rule->{iface_in};
1786     push @cmd, "-o $rule->{iface_out}" if $rule->{iface_out};
1787
1788     my $source = $rule->{source};
1789     my $dest = $rule->{dest};
1790
1791     if ($source) {
1792         if ($source =~ m/^\+/) {
1793             if ($source =~ m/^\+(${ipset_name_pattern})$/) {
1794                 my $name = $1;
1795                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1796                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1797                     push @cmd, "-m set --match-set ${ipset_chain} src";
1798                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1799                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1800                     push @cmd, "-m set --match-set ${ipset_chain} src";
1801                 } else {
1802                     die "no such ipset '$name'\n";
1803                 }
1804             } else {
1805                 die "invalid security group name '$source'\n";
1806             }
1807         } elsif ($source =~ m/^${ip_alias_pattern}$/){
1808             my $alias = lc($source);
1809             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1810             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1811             die "no such alias '$source'\n" if !$e;
1812             push @cmd, "-s $e->{cidr}";
1813         } elsif ($source =~ m/\-/){
1814             push @cmd, "-m iprange --src-range $source";
1815         } else {
1816             push @cmd, "-s $source";
1817         }
1818     }
1819
1820     if ($dest) {
1821         if ($dest =~ m/^\+/) {
1822             if ($dest =~ m/^\+(${ipset_name_pattern})$/) {
1823                 my $name = $1;
1824                 if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1825                     my $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1826                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1827                 } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1828                     my $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1829                     push @cmd, "-m set --match-set ${ipset_chain} dst";
1830                 } else {
1831                     die "no such ipset '$name'\n";
1832                 }
1833             } else {
1834                 die "invalid security group name '$dest'\n";
1835             }
1836         } elsif ($dest =~ m/^${ip_alias_pattern}$/){
1837             my $alias = lc($dest);
1838             my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1839             $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1840             die "no such alias '$dest'\n" if !$e;
1841             push @cmd, "-d $e->{cidr}";
1842         } elsif ($dest =~ m/^(\d+)\.(\d+).(\d+).(\d+)\-(\d+)\.(\d+).(\d+).(\d+)$/){
1843             push @cmd, "-m iprange --dst-range $dest";
1844         } else {
1845             push @cmd, "-d $dest";
1846         }
1847     }
1848
1849     if (my $proto = $rule->{proto}) {
1850         push @cmd, "-p $proto";
1851
1852         my $multiport = 0;
1853         $multiport++ if $nbdport > 1;
1854         $multiport++ if $nbsport > 1;
1855
1856         push @cmd, "--match multiport" if $multiport;
1857
1858         die "multiport: option '--sports' cannot be used together with '--dports'\n"
1859             if ($multiport == 2) && ($rule->{dport} ne $rule->{sport});
1860
1861         if ($rule->{dport}) {
1862             if ($proto eq 'icmp') {
1863                 # Note: we use dport to store --icmp-type
1864                 die "unknown icmp-type '$rule->{dport}'\n"
1865                     if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1866                 push @cmd, "-m icmp --icmp-type $rule->{dport}";
1867             } elsif ($proto eq 'icmpv6') {
1868                 # Note: we use dport to store --icmpv6-type
1869                 die "unknown icmpv6-type '$rule->{dport}'\n"
1870                     if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1871                 push @cmd, "-m icmpv6 --icmpv6-type $rule->{dport}";
1872             } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1873                 die "protocol $proto does not have ports\n";
1874             } else {
1875                 if ($nbdport > 1) {
1876                     if ($multiport == 2) {
1877                         push @cmd,  "--ports $rule->{dport}";
1878                     } else {
1879                         push @cmd, "--dports $rule->{dport}";
1880                     }
1881                 } else {
1882                     push @cmd, "--dport $rule->{dport}";
1883                 }
1884             }
1885         }
1886
1887         if ($rule->{sport}) {
1888             die "protocol $proto does not have ports\n"
1889                  if !$PROTOCOLS_WITH_PORTS->{$proto};
1890             if ($nbsport > 1) {
1891                 push @cmd, "--sports $rule->{sport}" if $multiport != 2;
1892             } else {
1893                 push @cmd, "--sport $rule->{sport}";
1894             }
1895         }
1896     } elsif ($rule->{dport} || $rule->{sport}) {
1897         die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1898         die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1899     }
1900
1901     push @cmd, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1902
1903     if (my $action = $rule->{action}) {
1904         $action = $actions->{$action} if defined($actions->{$action});
1905         $goto = 1 if !defined($goto) && $action eq 'PVEFW-SET-ACCEPT-MARK';
1906         push @cmd, $goto ? "-g $action" : "-j $action";
1907     }
1908
1909     return scalar(@cmd) ? join(' ', @cmd) : undef;
1910 }
1911
1912 sub ruleset_generate_rule {
1913     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto, $cluster_conf, $fw_conf) = @_;
1914
1915     my $rules;
1916
1917     if ($rule->{macro}) {
1918         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1919     } else {
1920         $rules = [ $rule ];
1921     }
1922
1923     # update all or nothing
1924
1925     my @cmds = ();
1926     foreach my $tmp (@$rules) {
1927         if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $tmp, $actions, $goto, $cluster_conf, $fw_conf)) {
1928             push @cmds, $cmdstr;
1929         }
1930     }
1931
1932     foreach my $cmdstr (@cmds) {
1933         ruleset_addrule($ruleset, $chain, $cmdstr);
1934     }
1935 }
1936
1937 sub ruleset_generate_rule_insert {
1938     my ($ruleset, $chain, $ipversion, $rule, $actions, $goto) = @_;
1939
1940     die "implement me" if $rule->{macro}; # not implemented, because not needed so far
1941
1942     if (my $cmdstr = ruleset_generate_cmdstr($ruleset, $chain, $ipversion, $rule, $actions, $goto)) {
1943         ruleset_insertrule($ruleset, $chain, $cmdstr);
1944     }
1945 }
1946
1947 sub ruleset_create_chain {
1948     my ($ruleset, $chain) = @_;
1949
1950     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1951     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1952
1953     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1954
1955     $ruleset->{$chain} = [];
1956 }
1957
1958 sub ruleset_chain_exist {
1959     my ($ruleset, $chain) = @_;
1960
1961     return $ruleset->{$chain} ? 1 : undef;
1962 }
1963
1964 sub ruleset_addrule {
1965    my ($ruleset, $chain, $rule) = @_;
1966
1967    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1968
1969    push @{$ruleset->{$chain}}, "-A $chain $rule";
1970 }
1971
1972 sub ruleset_insertrule {
1973    my ($ruleset, $chain, $rule) = @_;
1974
1975    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1976
1977    unshift @{$ruleset->{$chain}}, "-A $chain $rule";
1978 }
1979
1980 sub get_log_rule_base {
1981     my ($chain, $vmid, $msg, $loglevel) = @_;
1982
1983     die "internal error - no log level" if !defined($loglevel);
1984
1985     $vmid = 0 if !defined($vmid);
1986
1987     # Note: we use special format for prefix to pass further
1988     # info to log daemon (VMID, LOGVELEL and CHAIN)
1989
1990     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
1991 }
1992
1993 sub ruleset_addlog {
1994     my ($ruleset, $chain, $vmid, $msg, $loglevel, $rule) = @_;
1995
1996     return if !defined($loglevel);
1997
1998     my $logrule = get_log_rule_base($chain, $vmid, $msg, $loglevel);
1999
2000     $logrule = "$rule $logrule" if defined($rule);
2001
2002     ruleset_addrule($ruleset, $chain, $logrule);
2003 }
2004
2005 sub ruleset_add_chain_policy {
2006     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2007
2008     if ($policy eq 'ACCEPT') {
2009
2010         ruleset_generate_rule($ruleset, $chain, $ipversion, { action => 'ACCEPT' },
2011                               { ACCEPT =>  $accept_action});
2012
2013     } elsif ($policy eq 'DROP') {
2014
2015         ruleset_addrule($ruleset, $chain, "-j PVEFW-Drop");
2016
2017         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2018
2019         ruleset_addrule($ruleset, $chain, "-j DROP");
2020     } elsif ($policy eq 'REJECT') {
2021         ruleset_addrule($ruleset, $chain, "-j PVEFW-Reject");
2022
2023         ruleset_addlog($ruleset, $chain, $vmid, "policy $policy: ", $loglevel);
2024
2025         ruleset_addrule($ruleset, $chain, "-g PVEFW-reject");
2026     } else {
2027         # should not happen
2028         die "internal error: unknown policy '$policy'";
2029     }
2030 }
2031
2032 sub ruleset_chain_add_ndp {
2033     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2034     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2035
2036     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation $accept");
2037     if ($direction ne 'OUT' || $options->{radv}) {
2038         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement $accept");
2039     }
2040     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation $accept");
2041     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement $accept");
2042 }
2043
2044 sub ruleset_chain_add_conn_filters {
2045     my ($ruleset, $chain, $accept) = @_;
2046
2047     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID -j DROP");
2048     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED -j $accept");
2049 }
2050
2051 sub ruleset_chain_add_input_filters {
2052     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2053
2054     if ($cluster_conf->{ipset}->{blacklist}){
2055         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2056             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2057             ruleset_addlog($ruleset, "PVEFW-blacklist", 0, "DROP: ", $loglevel) if $loglevel;
2058             ruleset_addrule($ruleset, "PVEFW-blacklist", "-j DROP");
2059         }
2060         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2061         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src -j PVEFW-blacklist");
2062     }
2063
2064     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2065         if ($ipversion == 4) {
2066             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW -j PVEFW-smurfs");
2067         }
2068     }
2069
2070     if ($options->{tcpflags}) {
2071         ruleset_addrule($ruleset, $chain, "-p tcp -j PVEFW-tcpflags");
2072     }
2073 }
2074
2075 sub ruleset_create_vm_chain {
2076     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2077
2078     ruleset_create_chain($ruleset, $chain);
2079     my $accept = generate_nfqueue($options);
2080
2081     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2082         if ($ipversion == 4) {
2083             if ($direction eq 'OUT') {
2084                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2085                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2086                                         proto => 'udp', sport => 68, dport => 67 });
2087             } else {
2088                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2089                                       { action => 'ACCEPT',
2090                                         proto => 'udp', sport => 67, dport => 68 });
2091             }
2092         } elsif ($ipversion == 6) {
2093             if ($direction eq 'OUT') {
2094                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2095                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2096                                         proto => 'udp', sport => 546, dport => 547 });
2097             } else {
2098                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2099                                       { action => 'ACCEPT',
2100                                         proto => 'udp', sport => 547, dport => 546 });
2101             }
2102         }
2103
2104     }
2105
2106     if ($direction eq 'OUT') {
2107         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2108             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr -j DROP");
2109         }
2110         if ($ipversion == 6 && !$options->{radv}) {
2111             ruleset_addrule($ruleset, $chain, '-p icmpv6 --icmpv6-type router-advertisement -j DROP');
2112         }
2113         if ($ipfilter_ipset) {
2114             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src -j DROP");
2115         }
2116         ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2117     }
2118
2119     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2120     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2121 }
2122
2123 sub ruleset_add_group_rule {
2124     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2125
2126     my $group = $rule->{action};
2127     my $group_chain = "GROUP-$group-$direction";
2128     if(!ruleset_chain_exist($ruleset, $group_chain)){
2129         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2130     }
2131
2132     if ($direction eq 'OUT' && $rule->{iface_out}) {
2133         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out} -j $group_chain");
2134     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2135         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in} -j $group_chain");
2136     } else {
2137         ruleset_addrule($ruleset, $chain, "-j $group_chain");
2138     }
2139
2140     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON -j $action");
2141 }
2142
2143 sub ruleset_generate_vm_rules {
2144     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2145
2146     my $lc_direction = lc($direction);
2147
2148     my $in_accept = generate_nfqueue($options);
2149
2150     foreach my $rule (@$rules) {
2151         next if $rule->{iface} && $rule->{iface} ne $netid;
2152         next if !$rule->{enable} || $rule->{errors};
2153         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2154
2155         if ($rule->{type} eq 'group') {
2156             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2157                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2158         } else {
2159             next if $rule->{type} ne $lc_direction;
2160             eval {
2161                 if ($direction eq 'OUT') {
2162                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2163                                           { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2164                                           undef, $cluster_conf, $vmfw_conf);
2165                 } else {
2166                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2167                                           { ACCEPT => $in_accept , REJECT => "PVEFW-reject" },
2168                                           undef, $cluster_conf, $vmfw_conf);
2169                 }
2170             };
2171             warn $@ if $@;
2172         }
2173     }
2174 }
2175
2176 sub generate_nfqueue {
2177     my ($options) = @_;
2178
2179     if ($options->{ips}) {
2180         my $action = "NFQUEUE";
2181         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2182             if (defined($3) && defined($1)) {
2183                 $action .= " --queue-balance $1:$3";
2184             } elsif (defined($1)) {
2185                 $action .= " --queue-num $1";
2186             }
2187         }
2188         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2189         return $action;
2190     } else {
2191         return "ACCEPT";
2192     }
2193 }
2194
2195 sub ruleset_generate_vm_ipsrules {
2196     my ($ruleset, $options, $direction, $iface) = @_;
2197
2198     if ($options->{ips} && $direction eq 'IN') {
2199         my $nfqueue = generate_nfqueue($options);
2200
2201         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2202             ruleset_create_chain($ruleset, "PVEFW-IPS");
2203         }
2204
2205         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged -j $nfqueue");
2206     }
2207 }
2208
2209 sub generate_tap_rules_direction {
2210     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2211
2212     my $lc_direction = lc($direction);
2213
2214     my $rules = $vmfw_conf->{rules};
2215
2216     my $options = $vmfw_conf->{options};
2217     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2218
2219     my $tapchain = "$iface-$direction";
2220
2221     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2222     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2223         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2224
2225     # create chain with mac and ip filter
2226     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2227
2228     if ($options->{enable}) {
2229         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2230
2231         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2232
2233         # implement policy
2234         my $policy;
2235
2236         if ($direction eq 'OUT') {
2237             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2238         } else {
2239         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2240         }
2241
2242         my $accept = generate_nfqueue($options);
2243         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2244         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2245     } else {
2246         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2247         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2248     }
2249
2250     # plug the tap chain to bridge chain
2251     if ($direction eq 'IN') {
2252         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2253                         "-m physdev --physdev-is-bridged --physdev-out $iface -j $tapchain");
2254     } else {
2255         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2256                         "-m physdev --physdev-is-bridged --physdev-in $iface -j $tapchain");
2257     }
2258 }
2259
2260 sub enable_host_firewall {
2261     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2262
2263     my $options = $hostfw_conf->{options};
2264     my $cluster_options = $cluster_conf->{options};
2265     my $rules = $hostfw_conf->{rules};
2266     my $cluster_rules = $cluster_conf->{rules};
2267
2268     # host inbound firewall
2269     my $chain = "PVEFW-HOST-IN";
2270     ruleset_create_chain($ruleset, $chain);
2271
2272     my $loglevel = get_option_log_level($options, "log_level_in");
2273
2274     ruleset_addrule($ruleset, $chain, "-i lo -j ACCEPT");
2275
2276     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2277     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2278     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2279
2280     # we use RETURN because we need to check also tap rules
2281     my $accept_action = 'RETURN';
2282
2283     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2284
2285     # add host rules first, so that cluster wide rules can be overwritten
2286     foreach my $rule (@$rules, @$cluster_rules) {
2287         next if !$rule->{enable} || $rule->{errors};
2288         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2289
2290         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2291
2292         eval {
2293             if ($rule->{type} eq 'group') {
2294                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2295             } elsif ($rule->{type} eq 'in') {
2296                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2297                                       { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2298                                       undef, $cluster_conf, $hostfw_conf);
2299             }
2300         };
2301         warn $@ if $@;
2302         delete $rule->{iface_in};
2303     }
2304
2305     # allow standard traffic for management ipset (includes cluster network)
2306     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2307     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2308     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006 -j $accept_action");  # PVE API
2309     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2310     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2311     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22 -j $accept_action");  # SSH
2312
2313     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2314     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2315
2316     # corosync
2317     if ($localnet && ($ipversion == $localnet_ver)) {
2318         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2319         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule");
2320         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule");
2321     }
2322
2323     # implement input policy
2324     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2325     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2326
2327     # host outbound firewall
2328     $chain = "PVEFW-HOST-OUT";
2329     ruleset_create_chain($ruleset, $chain);
2330
2331     $loglevel = get_option_log_level($options, "log_level_out");
2332
2333     ruleset_addrule($ruleset, $chain, "-o lo -j ACCEPT");
2334
2335     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2336
2337     # we use RETURN because we may want to check other thigs later
2338     $accept_action = 'RETURN';
2339     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2340
2341     ruleset_addrule($ruleset, $chain, "-p igmp -j $accept_action"); # important for multicast
2342
2343     # add host rules first, so that cluster wide rules can be overwritten
2344     foreach my $rule (@$rules, @$cluster_rules) {
2345         next if !$rule->{enable} || $rule->{errors};
2346         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2347
2348         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2349         eval {
2350             if ($rule->{type} eq 'group') {
2351                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2352             } elsif ($rule->{type} eq 'out') {
2353                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2354                                       $rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" },
2355                                       undef, $cluster_conf, $hostfw_conf);
2356             }
2357         };
2358         warn $@ if $@;
2359         delete $rule->{iface_out};
2360     }
2361
2362     # allow standard traffic on cluster network
2363     if ($localnet && ($ipversion == $localnet_ver)) {
2364         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006 -j $accept_action");  # PVE API
2365         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22 -j $accept_action");  # SSH
2366         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999 -j $accept_action");  # PVE VNC Console
2367         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128 -j $accept_action");  # SPICE Proxy
2368
2369         my $corosync_rule = "-p udp --dport 5404:5405 -j $accept_action";
2370         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule");
2371         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule");
2372     }
2373
2374     # implement output policy
2375     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2376     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2377
2378     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "-j PVEFW-HOST-OUT");
2379     ruleset_addrule($ruleset, "PVEFW-INPUT", "-j PVEFW-HOST-IN");
2380 }
2381
2382 sub generate_group_rules {
2383     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2384
2385     my $rules = $cluster_conf->{groups}->{$group};
2386
2387     if (!$rules) {
2388         warn "no such security group '$group'\n";
2389         $rules = []; # create empty chain
2390     }
2391
2392     my $chain = "GROUP-${group}-IN";
2393
2394     ruleset_create_chain($ruleset, $chain);
2395     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2396
2397     foreach my $rule (@$rules) {
2398         next if $rule->{type} ne 'in';
2399         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2400         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2401                               { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" },
2402                               undef, $cluster_conf);
2403     }
2404
2405     $chain = "GROUP-${group}-OUT";
2406
2407     ruleset_create_chain($ruleset, $chain);
2408     ruleset_addrule($ruleset, $chain, "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2409
2410     foreach my $rule (@$rules) {
2411         next if $rule->{type} ne 'out';
2412         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2413         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2414         # check also other tap rules later
2415         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule,
2416                               { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" },
2417                               undef, $cluster_conf);
2418     }
2419 }
2420
2421 my $MAX_NETS = 32;
2422 my $valid_netdev_names = {};
2423 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2424     $valid_netdev_names->{"net$i"} = 1;
2425 }
2426
2427 sub get_mark_values {
2428     my ($value, $mask) = @_;
2429     $value = hex($value) if $value =~ /^0x/;
2430     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2431     $mask = 0xffffffff if !defined($mask);
2432     return ($value, $mask);
2433 }
2434
2435 sub parse_fw_rule {
2436     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2437
2438     my $orig_line = $line;
2439
2440     my $rule = {};
2441
2442     # we can add single line comments to the end of the rule
2443     if ($line =~ s/#\s*(.*?)\s*$//) {
2444         $rule->{comment} = decode('utf8', $1);
2445     }
2446
2447     # we can disable a rule when prefixed with '|'
2448
2449     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2450
2451     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2452         die "unable to parse rule: $line\n";
2453
2454     $rule->{type} = lc($1);
2455     $rule->{action} = $2;
2456
2457     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2458         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2459             $rule->{macro} = $1;
2460             $rule->{action} = $2;
2461         }
2462     }
2463
2464     while (length($line)) {
2465         if ($line =~ s/^-i (\S+)\s*//) {
2466             $rule->{iface} = $1;
2467             next;
2468         }
2469
2470         last if $rule->{type} eq 'group';
2471
2472         if ($line =~ s/^-p (\S+)\s*//) {
2473             $rule->{proto} = $1;
2474             next;
2475         }
2476
2477         if ($line =~ s/^-dport (\S+)\s*//) {
2478             $rule->{dport} = $1;
2479             next;
2480         }
2481
2482         if ($line =~ s/^-sport (\S+)\s*//) {
2483             $rule->{sport} = $1;
2484             next;
2485         }
2486         if ($line =~ s/^-source (\S+)\s*//) {
2487             $rule->{source} = $1;
2488             next;
2489         }
2490         if ($line =~ s/^-dest (\S+)\s*//) {
2491             $rule->{dest} = $1;
2492             next;
2493         }
2494
2495         last;
2496     }
2497
2498     die "unable to parse rule parameters: $line\n" if length($line);
2499
2500     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2501     if ($verbose && $rule->{errors}) {
2502         warn "$prefix - errors in rule parameters: $orig_line\n";
2503         foreach my $p (keys %{$rule->{errors}}) {
2504             warn "  $p: $rule->{errors}->{$p}\n";
2505         }
2506     }
2507
2508     return $rule;
2509 }
2510
2511 sub parse_vmfw_option {
2512     my ($line) = @_;
2513
2514     my ($opt, $value);
2515
2516     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2517
2518     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2519         $opt = lc($1);
2520         $value = int($2);
2521     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2522         $opt = lc($1);
2523         $value = $2 ? lc($3) : '';
2524     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2525         $opt = lc($1);
2526         $value = uc($3);
2527     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2528         $opt = lc($1);
2529         $value = $2;
2530     } else {
2531         die "can't parse option '$line'\n"
2532     }
2533
2534     return ($opt, $value);
2535 }
2536
2537 sub parse_hostfw_option {
2538     my ($line) = @_;
2539
2540     my ($opt, $value);
2541
2542     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2543
2544     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2545         $opt = lc($1);
2546         $value = int($2);
2547     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2548         $opt = lc($1);
2549         $value = $2 ? lc($3) : '';
2550     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2551         $opt = lc($1);
2552         $value = int($2);
2553     } else {
2554         die "can't parse option '$line'\n"
2555     }
2556
2557     return ($opt, $value);
2558 }
2559
2560 sub parse_clusterfw_option {
2561     my ($line) = @_;
2562
2563     my ($opt, $value);
2564
2565     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2566         $opt = lc($1);
2567         $value = int($2);
2568         if (($value > 1) && ((time() - $value) > 60)) {
2569             $value = 0
2570         }
2571     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2572         $opt = lc($1);
2573         $value = uc($3);
2574     } else {
2575         die "can't parse option '$line'\n"
2576     }
2577
2578     return ($opt, $value);
2579 }
2580
2581 sub resolve_alias {
2582     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2583
2584     my $alias = lc($cidr);
2585     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2586     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2587
2588     die "no such alias '$cidr'\n" if !$e;;
2589
2590     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2591 }
2592
2593 sub parse_ip_or_cidr {
2594     my ($cidr) = @_;
2595
2596     my $ipversion;
2597
2598     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2599         $cidr =~ s|/128$||;
2600         $ipversion = 6;
2601     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2602         $cidr =~ s|/32$||;
2603         $ipversion = 4;
2604     } else {
2605         die "value does not look like a valid IP address or CIDR network\n";
2606     }
2607
2608     return wantarray ? ($cidr, $ipversion) : $cidr;
2609 }
2610
2611 sub parse_alias {
2612     my ($line) = @_;
2613
2614     # we can add single line comments to the end of the line
2615     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2616
2617     if ($line =~ m/^(\S+)\s(\S+)$/) {
2618         my ($name, $cidr) = ($1, $2);
2619         my $ipversion;
2620
2621         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2622
2623         my $data = {
2624             name => $name,
2625             cidr => $cidr,
2626             ipversion => $ipversion,
2627         };
2628         $data->{comment} = $comment  if $comment;
2629         return $data;
2630     }
2631
2632     return undef;
2633 }
2634
2635 sub generic_fw_config_parser {
2636     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2637
2638     my $section;
2639     my $group;
2640
2641     my $res = $empty_conf;
2642
2643     while (defined(my $line = <$fh>)) {
2644         next if $line =~ m/^#/;
2645         next if $line =~ m/^\s*$/;
2646
2647         chomp $line;
2648
2649         my $linenr = $fh->input_line_number();
2650         my $prefix = "$filename (line $linenr)";
2651
2652         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2653             $section = 'options';
2654             next;
2655         }
2656
2657         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2658             $section = 'aliases';
2659             next;
2660         }
2661
2662         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2663             $section = 'groups';
2664             $group = lc($1);
2665             my $comment = $2;
2666             eval {
2667                 die "security group name too long\n" if length($group) > $max_group_name_length;
2668                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2669             };
2670             if (my $err = $@) {
2671                 ($section, $group, $comment) = undef;
2672                 warn "$prefix: $err";
2673                 next;
2674             }
2675
2676             $res->{$section}->{$group} = [];
2677             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2678                 if $comment;
2679             next;
2680         }
2681
2682         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2683             $section = 'rules';
2684             next;
2685         }
2686
2687         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2688             $section = 'ipset';
2689             $group = lc($1);
2690             my $comment = $2;
2691             eval {
2692                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2693                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2694             };
2695             if (my $err = $@) {
2696                 ($section, $group, $comment) = undef;
2697                 warn "$prefix: $err";
2698                 next;
2699             }
2700
2701             $res->{$section}->{$group} = [];
2702             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2703                 if $comment;
2704             next;
2705         }
2706
2707         if (!$section) {
2708             warn "$prefix: skip line - no section\n";
2709             next;
2710         }
2711
2712         if ($section eq 'options') {
2713             eval {
2714                 my ($opt, $value);
2715                 if ($rule_env eq 'cluster') {
2716                     ($opt, $value) = parse_clusterfw_option($line);
2717                 } elsif ($rule_env eq 'host') {
2718                     ($opt, $value) = parse_hostfw_option($line);
2719                 } else {
2720                     ($opt, $value) = parse_vmfw_option($line);
2721                 }
2722                 $res->{options}->{$opt} = $value;
2723             };
2724             warn "$prefix: $@" if $@;
2725         } elsif ($section eq 'aliases') {
2726             eval {
2727                 my $data = parse_alias($line);
2728                 $res->{aliases}->{lc($data->{name})} = $data;
2729             };
2730             warn "$prefix: $@" if $@;
2731         } elsif ($section eq 'rules') {
2732             my $rule;
2733             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2734             if (my $err = $@) {
2735                 warn "$prefix: $err";
2736                 next;
2737             }
2738             push @{$res->{$section}}, $rule;
2739         } elsif ($section eq 'groups') {
2740             my $rule;
2741             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2742             if (my $err = $@) {
2743                 warn "$prefix: $err";
2744                 next;
2745             }
2746             push @{$res->{$section}->{$group}}, $rule;
2747         } elsif ($section eq 'ipset') {
2748             # we can add single line comments to the end of the rule
2749             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2750
2751             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2752             my $nomatch = $1;
2753             my $cidr = $2;
2754             my $errors;
2755
2756             if ($nomatch && !$feature_ipset_nomatch) {
2757                 $errors->{nomatch} = "nomatch not supported by kernel";
2758             }
2759
2760             eval {
2761                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2762                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2763                 } else {
2764                     $cidr = parse_ip_or_cidr($cidr);
2765                 }
2766             };
2767             if (my $err = $@) {
2768                 chomp $err;
2769                 $errors->{cidr} = $err;
2770             }
2771
2772             my $entry = { cidr => $cidr };
2773             $entry->{nomatch} = 1 if $nomatch;
2774             $entry->{comment} = $comment if $comment;
2775             $entry->{errors} =  $errors if $errors;
2776
2777             if ($verbose && $errors) {
2778                 warn "$prefix - errors in ipset '$group': $line\n";
2779                 foreach my $p (keys %{$errors}) {
2780                     warn "  $p: $errors->{$p}\n";
2781                 }
2782             }
2783
2784             push @{$res->{$section}->{$group}}, $entry;
2785         } else {
2786             warn "$prefix: skip line - unknown section\n";
2787             next;
2788         }
2789     }
2790
2791     return $res;
2792 }
2793
2794 sub parse_hostfw_config {
2795     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2796
2797     my $empty_conf = { rules => [], options => {}};
2798
2799     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2800 }
2801
2802 sub parse_vmfw_config {
2803     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2804
2805     my $empty_conf = {
2806         rules => [],
2807         options => {},
2808         aliases => {},
2809         ipset => {} ,
2810         ipset_comments => {},
2811     };
2812
2813     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2814 }
2815
2816 sub parse_clusterfw_config {
2817     my ($filename, $fh, $verbose) = @_;
2818
2819     my $section;
2820     my $group;
2821
2822     my $empty_conf = {
2823         rules => [],
2824         options => {},
2825         aliases => {},
2826         groups => {},
2827         group_comments => {},
2828         ipset => {} ,
2829         ipset_comments => {},
2830     };
2831
2832     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2833 }
2834
2835 sub run_locked {
2836     my ($code, @param) = @_;
2837
2838     my $timeout = 10;
2839
2840     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2841
2842     die $@ if $@;
2843
2844     return $res;
2845 }
2846
2847 sub read_local_vm_config {
2848
2849     my $qemu = {};
2850     my $lxc = {};
2851
2852     my $vmdata = { qemu => $qemu, lxc => $lxc };
2853
2854     my $vmlist = PVE::Cluster::get_vmlist();
2855     return $vmdata if !$vmlist || !$vmlist->{ids};
2856     my $ids = $vmlist->{ids};
2857
2858     foreach my $vmid (keys %$ids) {
2859         next if !$vmid; # skip VE0
2860         my $d = $ids->{$vmid};
2861         next if !$d->{node} || $d->{node} ne $nodename;
2862         next if !$d->{type};
2863         if ($d->{type} eq 'qemu') {
2864             if ($have_qemu_server) {
2865                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2866                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2867                     $qemu->{$vmid} = $conf;
2868                 }
2869             }
2870         } elsif ($d->{type} eq 'lxc') {
2871             if ($have_lxc) {
2872                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2873                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2874                     $lxc->{$vmid} = $conf;
2875                 }
2876             }
2877         }
2878     }
2879
2880     return $vmdata;
2881 };
2882
2883 sub load_vmfw_conf {
2884     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2885
2886     my $vmfw_conf = {};
2887
2888     $dir = $pvefw_conf_dir if !defined($dir);
2889
2890     my $filename = "$dir/$vmid.fw";
2891     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2892         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2893         $vmfw_conf->{vmid} = $vmid;
2894     }
2895
2896     return $vmfw_conf;
2897 }
2898
2899 my $format_rules = sub {
2900     my ($rules, $allow_iface) = @_;
2901
2902     my $raw = '';
2903
2904     foreach my $rule (@$rules) {
2905         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2906             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2907             $raw .= uc($rule->{type});
2908             if ($rule->{macro}) {
2909                 $raw .= " $rule->{macro}($rule->{action})";
2910             } else {
2911                 $raw .= " " . $rule->{action};
2912             }
2913             if ($allow_iface && $rule->{iface}) {
2914                 $raw .= " -i $rule->{iface}";
2915             }
2916
2917             if ($rule->{type} ne  'group')  {
2918                 $raw .= " -source $rule->{source}" if $rule->{source};
2919                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2920                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2921                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2922                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2923             }
2924
2925             $raw .= " # " . encode('utf8', $rule->{comment})
2926                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2927             $raw .= "\n";
2928         } else {
2929             die "unknown rule type '$rule->{type}'";
2930         }
2931     }
2932
2933     return $raw;
2934 };
2935
2936 my $format_options = sub {
2937     my ($options) = @_;
2938
2939     my $raw = '';
2940
2941     $raw .= "[OPTIONS]\n\n";
2942     foreach my $opt (keys %$options) {
2943         $raw .= "$opt: $options->{$opt}\n";
2944     }
2945     $raw .= "\n";
2946
2947     return $raw;
2948 };
2949
2950 my $format_aliases = sub {
2951     my ($aliases) = @_;
2952
2953     my $raw = '';
2954
2955     $raw .= "[ALIASES]\n\n";
2956     foreach my $k (keys %$aliases) {
2957         my $e = $aliases->{$k};
2958         $raw .= "$e->{name} $e->{cidr}";
2959         $raw .= " # " . encode('utf8', $e->{comment})
2960             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2961         $raw .= "\n";
2962     }
2963     $raw .= "\n";
2964
2965     return $raw;
2966 };
2967
2968 my $format_ipsets = sub {
2969     my ($fw_conf) = @_;
2970
2971     my $raw = '';
2972
2973     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
2974         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
2975             my $utf8comment = encode('utf8', $comment);
2976             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
2977         } else {
2978             $raw .= "[IPSET $ipset]\n\n";
2979         }
2980         my $options = $fw_conf->{ipset}->{$ipset};
2981
2982         my $nethash = {};
2983         foreach my $entry (@$options) {
2984             $nethash->{$entry->{cidr}} = $entry;
2985         }
2986
2987         foreach my $cidr (sort keys %$nethash) {
2988             my $entry = $nethash->{$cidr};
2989             my $line = $entry->{nomatch} ? '!' : '';
2990             $line .= $entry->{cidr};
2991             $line .= " # " . encode('utf8', $entry->{comment})
2992                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
2993             $raw .= "$line\n";
2994         }
2995
2996         $raw .= "\n";
2997     }
2998
2999     return $raw;
3000 };
3001
3002 sub save_vmfw_conf {
3003     my ($vmid, $vmfw_conf) = @_;
3004
3005     my $raw = '';
3006
3007     my $options = $vmfw_conf->{options};
3008     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3009
3010     my $aliases = $vmfw_conf->{aliases};
3011     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3012
3013     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3014
3015     my $rules = $vmfw_conf->{rules} || [];
3016     if ($rules && scalar(@$rules)) {
3017         $raw .= "[RULES]\n\n";
3018         $raw .= &$format_rules($rules, 1);
3019         $raw .= "\n";
3020     }
3021
3022     my $filename = "$pvefw_conf_dir/$vmid.fw";
3023     if ($raw) {
3024         mkdir $pvefw_conf_dir;
3025         PVE::Tools::file_set_contents($filename, $raw);
3026     } else {
3027         unlink $filename;
3028     }
3029 }
3030
3031 sub remove_vmfw_conf {
3032     my ($vmid) = @_;
3033
3034     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3035
3036     unlink $vmfw_conffile;
3037 }
3038
3039 sub clone_vmfw_conf {
3040     my ($vmid, $newid) = @_;
3041
3042     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3043     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3044
3045     if (-f $clonevm_conffile) {
3046         unlink $clonevm_conffile;
3047     }
3048     if (-f $sourcevm_conffile) {
3049         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3050         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3051     }
3052 }
3053
3054 sub read_vm_firewall_configs {
3055     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3056
3057     my $vmfw_configs = {};
3058
3059     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3060         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3061         next if !$vmfw_conf->{options}; # skip if file does not exists
3062         $vmfw_configs->{$vmid} = $vmfw_conf;
3063     }
3064     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3065         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3066         next if !$vmfw_conf->{options}; # skip if file does not exists
3067         $vmfw_configs->{$vmid} = $vmfw_conf;
3068     }
3069
3070     return $vmfw_configs;
3071 }
3072
3073 sub get_option_log_level {
3074     my ($options, $k) = @_;
3075
3076     my $v = $options->{$k};
3077     $v = $default_log_level if !defined($v);
3078
3079     return undef if $v eq '' || $v eq 'nolog';
3080
3081     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3082
3083     return $v if ($v >= 0) && ($v <= 7);
3084
3085     warn "unknown log level ($k = '$v')\n";
3086
3087     return undef;
3088 }
3089
3090 sub generate_std_chains {
3091     my ($ruleset, $options, $ipversion) = @_;
3092
3093     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3094
3095     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3096
3097     my $chain;
3098
3099     if ($ipversion == 4) {
3100         # same as shorewall smurflog.
3101         $chain = 'PVEFW-smurflog';
3102         $std_chains->{$chain} = [];
3103
3104         push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3105         push @{$std_chains->{$chain}}, "-j DROP";
3106     }
3107
3108     # same as shorewall logflags action.
3109     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3110     $chain = 'PVEFW-logflags';
3111     $std_chains->{$chain} = [];
3112
3113     # fixme: is this correctly logged by pvewf-logger? (ther is no --log-ip-options for NFLOG)
3114     push @{$std_chains->{$chain}}, get_log_rule_base($chain, 0, "DROP: ", $loglevel) if $loglevel;
3115     push @{$std_chains->{$chain}}, "-j DROP";
3116
3117     foreach my $chain (keys %$std_chains) {
3118         ruleset_create_chain($ruleset, $chain);
3119         foreach my $rule (@{$std_chains->{$chain}}) {
3120             if (ref($rule)) {
3121                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3122             } else {
3123                 ruleset_addrule($ruleset, $chain, $rule);
3124             }
3125         }
3126     }
3127 }
3128
3129 sub generate_ipset_chains {
3130     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3131
3132     foreach my $ipset (keys %{$ipsets}) {
3133
3134         my $options = $ipsets->{$ipset};
3135
3136         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3137             if (my $ips = $device_ips->{$1}) {
3138                 $options = [@$options, @$ips];
3139             }
3140         }
3141
3142         # remove duplicates
3143         my $nethash = {};
3144         foreach my $entry (@$options) {
3145             next if $entry->{errors}; # skip entries with errors
3146             eval {
3147                 my ($cidr, $ver);
3148                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3149                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3150                 } else {
3151                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3152                 }
3153                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3154                 if ($ver == 6) {
3155                     # ip_compress_address takes an address only, no CIDR
3156                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3157                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3158                     $cidr .= $prefix_len if defined($prefix_len);
3159                     $cidr =~ s|/128$||;
3160                 } else {
3161                     $cidr =~ s|/32$||;
3162                 }
3163
3164                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3165             };
3166             warn $@ if $@;
3167         }
3168
3169         foreach my $ipversion (4, 6) {
3170             my $data = $nethash->{$ipversion};
3171
3172             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3173
3174             my $hashsize = scalar(@$options);
3175             if ($hashsize <= 64) {
3176                 $hashsize = 64;
3177             } else {
3178                 $hashsize = round_powerof2($hashsize);
3179             }
3180
3181             my $family = $ipversion == "6" ? "inet6" : "inet";
3182
3183             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3184
3185             foreach my $cidr (sort keys %$data) {
3186                 my $entry = $data->{$cidr};
3187
3188                 my $cmd = "add $name $cidr";
3189                 if ($entry->{nomatch}) {
3190                     if ($feature_ipset_nomatch) {
3191                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3192                     } else {
3193                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3194                     }
3195                 } else {
3196                     push @{$ipset_ruleset->{$name}}, $cmd;
3197                 }
3198             }
3199         }
3200     }
3201 }
3202
3203 sub round_powerof2 {
3204     my ($int) = @_;
3205
3206     $int--;
3207     $int |= $int >> $_ foreach (1,2,4,8,16);
3208     return ++$int;
3209 }
3210
3211 sub load_clusterfw_conf {
3212     my ($filename, $verbose) = @_;
3213
3214     $filename = $clusterfw_conf_filename if !defined($filename);
3215
3216     my $cluster_conf = {};
3217     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3218         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3219     }
3220
3221     return $cluster_conf;
3222 }
3223
3224 sub save_clusterfw_conf {
3225     my ($cluster_conf) = @_;
3226
3227     my $raw = '';
3228
3229     my $options = $cluster_conf->{options};
3230     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3231
3232     my $aliases = $cluster_conf->{aliases};
3233     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3234
3235     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3236
3237     my $rules = $cluster_conf->{rules};
3238     if ($rules && scalar(@$rules)) {
3239         $raw .= "[RULES]\n\n";
3240         $raw .= &$format_rules($rules, 1);
3241         $raw .= "\n";
3242     }
3243
3244     if ($cluster_conf->{groups}) {
3245         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3246             my $rules = $cluster_conf->{groups}->{$group};
3247             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3248                 my $utf8comment = encode('utf8', $comment);
3249                 $raw .= "[group $group] # $utf8comment\n\n";
3250             } else {
3251                 $raw .= "[group $group]\n\n";
3252             }
3253
3254             $raw .= &$format_rules($rules, 0);
3255             $raw .= "\n";
3256         }
3257     }
3258
3259     if ($raw) {
3260         mkdir $pvefw_conf_dir;
3261         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3262     } else {
3263         unlink $clusterfw_conf_filename;
3264     }
3265 }
3266
3267 sub load_hostfw_conf {
3268     my ($cluster_conf, $filename, $verbose) = @_;
3269
3270     $filename = $hostfw_conf_filename if !defined($filename);
3271
3272     my $hostfw_conf = {};
3273     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3274         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3275     }
3276     return $hostfw_conf;
3277 }
3278
3279 sub save_hostfw_conf {
3280     my ($hostfw_conf) = @_;
3281
3282     my $raw = '';
3283
3284     my $options = $hostfw_conf->{options};
3285     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3286
3287     my $rules = $hostfw_conf->{rules};
3288     if ($rules && scalar(@$rules)) {
3289         $raw .= "[RULES]\n\n";
3290         $raw .= &$format_rules($rules, 1);
3291         $raw .= "\n";
3292     }
3293
3294     if ($raw) {
3295         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3296     } else {
3297         unlink $hostfw_conf_filename;
3298     }
3299 }
3300
3301 sub compile {
3302     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3303
3304     my $vmfw_configs;
3305
3306     if ($vmdata) { # test mode
3307         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3308         my $filename = "$testdir/cluster.fw";
3309         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3310
3311         $filename = "$testdir/host.fw";
3312         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3313
3314         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3315     } else { # normal operation
3316         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3317
3318         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3319
3320         $vmdata = read_local_vm_config();
3321         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3322     }
3323
3324     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3325
3326     my $localnet;
3327     if ($cluster_conf->{aliases}->{local_network}) {
3328         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3329     } else {
3330         my $localnet_ver;
3331         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3332
3333         $cluster_conf->{aliases}->{local_network} = {
3334             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3335     }
3336
3337     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3338
3339     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3340     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3341     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3342
3343     return ($ruleset, $ipset_ruleset, $rulesetv6);
3344 }
3345
3346 sub compile_iptables_filter {
3347     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3348
3349     my $ruleset = {};
3350
3351     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3352     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3353
3354     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3355
3356     my $hostfw_options = $hostfw_conf->{options} || {};
3357
3358     # fixme: what log level should we use here?
3359     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3360
3361     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3362
3363     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3364     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3365
3366     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+ -j PVEFW-FWBR-IN");
3367
3368     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3369     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+ -j PVEFW-FWBR-OUT");
3370
3371     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3372
3373     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3374
3375     if ($hostfw_enable) {
3376         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3377         warn $@ if $@; # just to be sure - should not happen
3378     }
3379
3380     # generate firewall rules for QEMU VMs
3381     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3382         eval {
3383             my $conf = $vmdata->{qemu}->{$vmid};
3384             my $vmfw_conf = $vmfw_configs->{$vmid};
3385             return if !$vmfw_conf;
3386
3387             foreach my $netid (sort keys %$conf) {
3388                 next if $netid !~ m/^net(\d+)$/;
3389                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3390                 next if !$net->{firewall};
3391                 my $iface = "tap${vmid}i$1";
3392
3393                 my $macaddr = $net->{macaddr};
3394                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3395                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3396                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3397                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3398             }
3399         };
3400         warn $@ if $@; # just to be sure - should not happen
3401     }
3402
3403     # generate firewall rules for LXC containers
3404     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3405         eval {
3406             my $conf = $vmdata->{lxc}->{$vmid};
3407             my $vmfw_conf = $vmfw_configs->{$vmid};
3408             return if !$vmfw_conf;
3409
3410             if ($vmfw_conf->{options}->{enable}) {
3411                 foreach my $netid (sort keys %$conf) {
3412                     next if $netid !~ m/^net(\d+)$/;
3413                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3414                     next if !$net->{firewall};
3415                     my $iface = "veth${vmid}i$1";
3416                     my $macaddr = $net->{hwaddr};
3417                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3418                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3419                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3420                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3421                 }
3422             }
3423         };
3424         warn $@ if $@; # just to be sure - should not happen
3425     }
3426
3427     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3428         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED -j PVEFW-IPS");
3429     }
3430
3431     return $ruleset;
3432 }
3433
3434 sub mac_to_linklocal {
3435     my ($macaddr) = @_;
3436     my @parts = split(/:/, $macaddr);
3437     # The standard link local address uses the fe80::/64 prefix with the
3438     # modified EUI-64 identifier derived from the MAC address by flipping the
3439     # universal/local bit and inserting FF:FE in the middle.
3440     # See RFC 4291.
3441     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3442     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3443     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3444 }
3445
3446 sub compile_ipsets {
3447     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3448
3449     my $localnet;
3450     if ($cluster_conf->{aliases}->{local_network}) {
3451         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3452     } else {
3453         my $localnet_ver;
3454         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3455
3456         $cluster_conf->{aliases}->{local_network} = {
3457             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3458     }
3459
3460     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3461
3462
3463     my $ipset_ruleset = {};
3464
3465     # generate ipsets for QEMU VMs
3466     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3467         eval {
3468             my $conf = $vmdata->{qemu}->{$vmid};
3469             my $vmfw_conf = $vmfw_configs->{$vmid};
3470             return if !$vmfw_conf;
3471
3472             # When the 'ipfilter' option is enabled every device for which there
3473             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3474             # ipset.
3475             # The reason is that ipfilter ipsets are always filled with standard
3476             # IPv6 link-local filters.
3477             my $ipsets = $vmfw_conf->{ipset};
3478             my $implicit_sets = {};
3479
3480             my $device_ips = {};
3481             foreach my $netid (keys %$conf) {
3482                 next if $netid !~ m/^net(\d+)$/;
3483                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3484                 next if !$net->{firewall};
3485
3486                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3487                     $implicit_sets->{"ipfilter-$netid"} = [];
3488                 }
3489
3490                 my $macaddr = $net->{macaddr};
3491                 my $linklocal = mac_to_linklocal($macaddr);
3492                 $device_ips->{$netid} = [
3493                     { cidr => $linklocal },
3494                     { cidr => 'fe80::/10', nomatch => 1 }
3495                 ];
3496             }
3497
3498             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3499             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3500         };
3501         warn $@ if $@; # just to be sure - should not happen
3502     }
3503
3504     # generate firewall rules for LXC containers
3505     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3506         eval {
3507             my $conf = $vmdata->{lxc}->{$vmid};
3508             my $vmfw_conf = $vmfw_configs->{$vmid};
3509             return if !$vmfw_conf;
3510
3511             # When the 'ipfilter' option is enabled every device for which there
3512             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3513             # ipset.
3514             # The reason is that ipfilter ipsets are always filled with standard
3515             # IPv6 link-local filters, as well as the IP addresses configured
3516             # for the container.
3517             my $ipsets = $vmfw_conf->{ipset};
3518             my $implicit_sets = {};
3519
3520             my $device_ips = {};
3521             foreach my $netid (keys %$conf) {
3522                 next if $netid !~ m/^net(\d+)$/;
3523                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3524                 next if !$net->{firewall};
3525
3526                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3527                     $implicit_sets->{"ipfilter-$netid"} = [];
3528                 }
3529
3530                 my $macaddr = $net->{hwaddr};
3531                 my $linklocal = mac_to_linklocal($macaddr);
3532                 my $set = $device_ips->{$netid} = [
3533                     { cidr => $linklocal },
3534                     { cidr => 'fe80::/10', nomatch => 1 }
3535                 ];
3536                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3537                     push @$set, { cidr => $1 };
3538                 }
3539                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3540                     push @$set, { cidr => $1 };
3541                 }
3542             }
3543
3544             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3545             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3546         };
3547         warn $@ if $@; # just to be sure - should not happen
3548     }
3549
3550     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3551
3552     return $ipset_ruleset;
3553 }
3554
3555 sub get_ruleset_status {
3556     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3557
3558     my $statushash = {};
3559
3560     foreach my $chain (sort keys %$ruleset) {
3561         my $sig = &$digest_fn($ruleset->{$chain});
3562
3563         $statushash->{$chain}->{sig} = $sig;
3564
3565         my $oldsig = $active_chains->{$chain};
3566         if (!defined($oldsig)) {
3567             $statushash->{$chain}->{action} = 'create';
3568         } else {
3569             if ($oldsig eq $sig) {
3570                 $statushash->{$chain}->{action} = 'exists';
3571             } else {
3572                 $statushash->{$chain}->{action} = 'update';
3573             }
3574         }
3575         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3576         foreach my $cmd (@{$ruleset->{$chain}}) {
3577             print "\t$cmd\n" if $verbose;
3578         }
3579     }
3580
3581     foreach my $chain (sort keys %$active_chains) {
3582         if (!defined($ruleset->{$chain})) {
3583             my $sig = $active_chains->{$chain};
3584             $statushash->{$chain}->{action} = 'delete';
3585             $statushash->{$chain}->{sig} = $sig;
3586             print "delete $chain ($sig)\n" if $verbose;
3587         }
3588     }
3589
3590     return $statushash;
3591 }
3592
3593 sub print_sig_rule {
3594     my ($chain, $sig) = @_;
3595
3596     # We just use this to store a SHA1 checksum used to detect changes
3597     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3598 }
3599
3600 sub get_ruleset_cmdlist {
3601     my ($ruleset, $verbose, $iptablescmd) = @_;
3602
3603     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3604
3605     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3606     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3607
3608     # create missing chains first
3609     foreach my $chain (sort keys %$ruleset) {
3610         my $stat = $statushash->{$chain};
3611         die "internal error" if !$stat;
3612         next if $stat->{action} ne 'create';
3613
3614         $cmdlist .= ":$chain - [0:0]\n";
3615     }
3616
3617     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3618         my $chain = "PVEFW-$h";
3619         if ($ruleset->{$chain} && !$hooks->{$h}) {
3620             $cmdlist .= "-A $h -j $chain\n";
3621         }
3622     }
3623
3624     foreach my $chain (sort keys %$ruleset) {
3625         my $stat = $statushash->{$chain};
3626         die "internal error" if !$stat;
3627
3628         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3629             $cmdlist .= "-F $chain\n";
3630             foreach my $cmd (@{$ruleset->{$chain}}) {
3631                 $cmdlist .= "$cmd\n";
3632             }
3633             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3634         } elsif ($stat->{action} eq 'delete') {
3635             die "internal error"; # this should not happen
3636         } elsif ($stat->{action} eq 'exists') {
3637             # do nothing
3638         } else {
3639             die "internal error - unknown status '$stat->{action}'";
3640         }
3641     }
3642
3643     foreach my $chain (keys %$statushash) {
3644         next if $statushash->{$chain}->{action} ne 'delete';
3645         $cmdlist .= "-F $chain\n";
3646     }
3647     foreach my $chain (keys %$statushash) {
3648         next if $statushash->{$chain}->{action} ne 'delete';
3649         next if $chain eq 'PVEFW-INPUT';
3650         next if $chain eq 'PVEFW-OUTPUT';
3651         next if $chain eq 'PVEFW-FORWARD';
3652         $cmdlist .= "-X $chain\n";
3653     }
3654
3655     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3656
3657     $cmdlist .= "COMMIT\n";
3658
3659     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3660 }
3661
3662 sub get_ipset_cmdlist {
3663     my ($ruleset, $verbose) = @_;
3664
3665     my $cmdlist = "";
3666
3667     my $delete_cmdlist = "";
3668
3669     my $active_chains = ipset_get_chains();
3670     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3671
3672     # remove stale _swap chains
3673     foreach my $chain (keys %$active_chains) {
3674         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3675             $cmdlist .= "destroy $chain\n";
3676         }
3677     }
3678
3679     foreach my $chain (keys %$ruleset) {
3680         my $stat = $statushash->{$chain};
3681         die "internal error" if !$stat;
3682
3683         if ($stat->{action} eq 'create') {
3684             foreach my $cmd (@{$ruleset->{$chain}}) {
3685                 $cmdlist .= "$cmd\n";
3686             }
3687         }
3688     }
3689
3690     foreach my $chain (keys %$ruleset) {
3691         my $stat = $statushash->{$chain};
3692         die "internal error" if !$stat;
3693
3694         if ($stat->{action} eq 'update') {
3695             my $chain_swap = $chain."_swap";
3696
3697             foreach my $cmd (@{$ruleset->{$chain}}) {
3698                 $cmd =~ s/$chain/$chain_swap/;
3699                 $cmdlist .= "$cmd\n";
3700             }
3701             $cmdlist .= "swap $chain_swap $chain\n";
3702             $cmdlist .= "flush $chain_swap\n";
3703             $cmdlist .= "destroy $chain_swap\n";
3704         }
3705     }
3706
3707      # the remove unused chains
3708     foreach my $chain (keys %$statushash) {
3709         next if $statushash->{$chain}->{action} ne 'delete';
3710
3711         $delete_cmdlist .= "flush $chain\n";
3712         $delete_cmdlist .= "destroy $chain\n";
3713     }
3714
3715     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3716
3717     return ($cmdlist, $delete_cmdlist, $changes);
3718 }
3719
3720 sub apply_ruleset {
3721     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3722
3723     enable_bridge_firewall();
3724
3725     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3726         get_ipset_cmdlist($ipset_ruleset, $verbose);
3727
3728     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3729     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3730
3731     if ($verbose) {
3732         if ($ipset_changes) {
3733             print "ipset changes:\n";
3734             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3735             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3736         }
3737
3738         if ($changes) {
3739             print "iptables changes:\n";
3740             print $cmdlist;
3741         }
3742
3743         if ($changesv6) {
3744             print "ip6tables changes:\n";
3745             print $cmdlistv6;
3746         }
3747     }
3748
3749     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3750     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3751
3752     ipset_restore_cmdlist($ipset_create_cmdlist);
3753
3754     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3755     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3756
3757     iptables_restore_cmdlist($cmdlist);
3758
3759     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3760     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3761
3762     ip6tables_restore_cmdlist($cmdlistv6);
3763
3764     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3765     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3766
3767     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3768
3769     # test: re-read status and check if everything is up to date
3770     my $active_chains = iptables_get_chains();
3771     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3772
3773     my $errors;
3774     foreach my $chain (sort keys %$ruleset) {
3775         my $stat = $statushash->{$chain};
3776         if ($stat->{action} ne 'exists') {
3777             warn "unable to update chain '$chain'\n";
3778             $errors = 1;
3779         }
3780     }
3781
3782     my $active_chainsv6 = iptables_get_chains("ip6tables");
3783     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3784
3785     foreach my $chain (sort keys %$rulesetv6) {
3786         my $stat = $statushashv6->{$chain};
3787         if ($stat->{action} ne 'exists') {
3788             warn "unable to update chain '$chain'\n";
3789             $errors = 1;
3790         }
3791     }
3792
3793     die "unable to apply firewall changes\n" if $errors;
3794
3795     update_nf_conntrack_max($hostfw_conf);
3796
3797     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3798
3799 }
3800
3801 sub update_nf_conntrack_max {
3802     my ($hostfw_conf) = @_;
3803
3804     my $max = 65536; # reasonable default
3805
3806     my $options = $hostfw_conf->{options} || {};
3807
3808     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3809         $max = $options->{nf_conntrack_max};
3810         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3811     }
3812
3813     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3814     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3815
3816     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3817
3818     if ($current != $max) {
3819         my $hashsize = int($max/4);
3820         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3821         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3822     }
3823 }
3824
3825 sub update_nf_conntrack_tcp_timeout_established {
3826     my ($hostfw_conf) = @_;
3827
3828     my $options = $hostfw_conf->{options} || {};
3829
3830     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3831
3832     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3833 }
3834
3835 sub remove_pvefw_chains {
3836
3837     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3838     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3839     PVE::Firewall::remove_pvefw_chains_ipset();
3840
3841 }
3842
3843 sub remove_pvefw_chains_iptables {
3844     my ($iptablescmd) = @_;
3845
3846     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3847     my $cmdlist = "*filter\n";
3848
3849     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3850         if ($hooks->{$h}) {
3851             $cmdlist .= "-D $h -j PVEFW-$h\n";
3852         }
3853     }
3854
3855     foreach my $chain (keys %$chash) {
3856         $cmdlist .= "-F $chain\n";
3857     }
3858
3859     foreach my $chain (keys %$chash) {
3860         $cmdlist .= "-X $chain\n";
3861     }
3862     $cmdlist .= "COMMIT\n";
3863
3864     if($iptablescmd eq "ip6tables") {
3865         ip6tables_restore_cmdlist($cmdlist);
3866     } else {
3867         iptables_restore_cmdlist($cmdlist);
3868     }
3869 }
3870
3871 sub remove_pvefw_chains_ipset {
3872
3873     my $ipset_chains = ipset_get_chains();
3874
3875     my $cmdlist = "";
3876
3877     foreach my $chain (keys %$ipset_chains) {
3878         $cmdlist .= "flush $chain\n";
3879         $cmdlist .= "destroy $chain\n";
3880     }
3881
3882     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3883 }
3884
3885 sub init {
3886     my $cluster_conf = load_clusterfw_conf();
3887     my $cluster_options = $cluster_conf->{options};
3888     my $enable = $cluster_options->{enable};
3889
3890     return if !$enable;
3891
3892     # load required modules here
3893 }
3894
3895 sub update {
3896     my $code = sub {
3897
3898         my $cluster_conf = load_clusterfw_conf();
3899         my $cluster_options = $cluster_conf->{options};
3900
3901         if (!$cluster_options->{enable}) {
3902             PVE::Firewall::remove_pvefw_chains();
3903             return;
3904         }
3905
3906         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3907
3908         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3909
3910         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3911     };
3912
3913     run_locked($code);
3914 }
3915
3916 1;