src/PVE/Firewall.pm

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