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 # enable => [0|1]
 150 # action =>
 151 # proto =>
 152 # sport => port[,port[,port]].. or port:port
 153 # dport => port[,port[,port]].. or port:port
 154 # log => optional, loglevel
 155 # logmsg => optional, logmsg - overwrites default
 156 # iface_in => incomin interface
 157 # iface_out => outgoing interface
 158 # match => optional, overwrites generation of match
 159 # target => optional, overwrites action
 160
 161 # we need to overwrite some macros for ipv6
 162 my $pve_ipv6fw_macros = {
 163     'Ping' => [
 164         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 165     ],
 166     'NeighborDiscovery' => [
 167         "IPv6 neighbor solicitation, neighbor and router advertisement",
 168         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 169         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 170         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 171         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 172     ],
 173     'DHCPv6' => [
 174         "DHCPv6 traffic",
 175         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 176     ],
 177     'Trcrt' => [
 178         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 179         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 180     ],
 181  };
 182
 183 # imported/converted from: /usr/share/shorewall/macro.*
 184 my $pve_fw_macros = {
 185     'Amanda' => [
 186         "Amanda Backup",
 187         { action => 'PARAM', proto => 'udp', dport => '10080' },
 188         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 189     ],
 190     'Auth' => [
 191         "Auth (identd) traffic",
 192         { action => 'PARAM', proto => 'tcp', dport => '113' },
 193     ],
 194     'BGP' => [
 195         "Border Gateway Protocol traffic",
 196         { action => 'PARAM', proto => 'tcp', dport => '179' },
 197     ],
 198     'BitTorrent' => [
 199         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 200         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 201         { action => 'PARAM', proto => 'udp', dport => '6881' },
 202     ],
 203     'BitTorrent32' => [
 204         "BitTorrent traffic for BitTorrent 3.2 and later",
 205         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 206         { action => 'PARAM', proto => 'udp', dport => '6881' },
 207     ],
 208     'Ceph' => [
 209         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 210         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 211         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 212     ],
 213     'CVS' => [
 214         "Concurrent Versions System pserver traffic",
 215         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 216     ],
 217     'Citrix' => [
 218         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 219         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 220         { action => 'PARAM', proto => 'udp', dport => '1604' },
 221         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 222     ],
 223     'DAAP' => [
 224         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 225         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 226         { action => 'PARAM', proto => 'udp', dport => '3689' },
 227     ],
 228     'DCC' => [
 229         "Distributed Checksum Clearinghouse spam filtering mechanism",
 230         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 231     ],
 232     'DHCPfwd' => [
 233         "Forwarded DHCP traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 235     ],
 236     'DNS' => [
 237         "Domain Name System traffic (upd and tcp)",
 238         { action => 'PARAM', proto => 'udp', dport => '53' },
 239         { action => 'PARAM', proto => 'tcp', dport => '53' },
 240     ],
 241     'Distcc' => [
 242         "Distributed Compiler service",
 243         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 244     ],
 245     'FTP' => [
 246         "File Transfer Protocol",
 247         { action => 'PARAM', proto => 'tcp', dport => '21' },
 248     ],
 249     'Finger' => [
 250         "Finger protocol (RFC 742)",
 251         { action => 'PARAM', proto => 'tcp', dport => '79' },
 252     ],
 253     'GNUnet' => [
 254         "GNUnet secure peer-to-peer networking traffic",
 255         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 256         { action => 'PARAM', proto => 'udp', dport => '2086' },
 257         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 258         { action => 'PARAM', proto => 'udp', dport => '1080' },
 259     ],
 260     'GRE' => [
 261         "Generic Routing Encapsulation tunneling protocol",
 262         { action => 'PARAM', proto => '47' },
 263     ],
 264     'Git' => [
 265         "Git distributed revision control traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 267     ],
 268     'HKP' => [
 269         "OpenPGP HTTP keyserver protocol traffic",
 270         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 271     ],
 272     'HTTP' => [
 273         "Hypertext Transfer Protocol (WWW)",
 274         { action => 'PARAM', proto => 'tcp', dport => '80' },
 275     ],
 276     'HTTPS' => [
 277         "Hypertext Transfer Protocol (WWW) over SSL",
 278         { action => 'PARAM', proto => 'tcp', dport => '443' },
 279     ],
 280     'ICPV2' => [
 281         "Internet Cache Protocol V2 (Squid) traffic",
 282         { action => 'PARAM', proto => 'udp', dport => '3130' },
 283     ],
 284     'ICQ' => [
 285         "AOL Instant Messenger traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 287     ],
 288     'IMAP' => [
 289         "Internet Message Access Protocol",
 290         { action => 'PARAM', proto => 'tcp', dport => '143' },
 291     ],
 292     'IMAPS' => [
 293         "Internet Message Access Protocol over SSL",
 294         { action => 'PARAM', proto => 'tcp', dport => '993' },
 295     ],
 296     'IPIP' => [
 297         "IPIP capsulation traffic",
 298         { action => 'PARAM', proto => '94' },
 299     ],
 300     'IPsec' => [
 301         "IPsec traffic",
 302         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 303         { action => 'PARAM', proto => '50' },
 304     ],
 305     'IPsecah' => [
 306         "IPsec authentication (AH) traffic",
 307         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 308         { action => 'PARAM', proto => '51' },
 309     ],
 310     'IPsecnat' => [
 311         "IPsec traffic and Nat-Traversal",
 312         { action => 'PARAM', proto => 'udp', dport => '500' },
 313         { action => 'PARAM', proto => 'udp', dport => '4500' },
 314         { action => 'PARAM', proto => '50' },
 315     ],
 316     'IRC' => [
 317         "Internet Relay Chat traffic",
 318         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 319     ],
 320     'Jetdirect' => [
 321         "HP Jetdirect printing",
 322         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 323     ],
 324     'L2TP' => [
 325         "Layer 2 Tunneling Protocol traffic",
 326         { action => 'PARAM', proto => 'udp', dport => '1701' },
 327     ],
 328     'LDAP' => [
 329         "Lightweight Directory Access Protocol traffic",
 330         { action => 'PARAM', proto => 'tcp', dport => '389' },
 331     ],
 332     'LDAPS' => [
 333         "Secure Lightweight Directory Access Protocol traffic",
 334         { action => 'PARAM', proto => 'tcp', dport => '636' },
 335     ],
 336     'MSNP' => [
 337         "Microsoft Notification Protocol",
 338         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 339     ],
 340     'MSSQL' => [
 341         "Microsoft SQL Server",
 342         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 343     ],
 344     'Mail' => [
 345         "Mail traffic (SMTP, SMTPS, Submission)",
 346         { action => 'PARAM', proto => 'tcp', dport => '25' },
 347         { action => 'PARAM', proto => 'tcp', dport => '465' },
 348         { action => 'PARAM', proto => 'tcp', dport => '587' },
 349     ],
 350     'MDNS' => [
 351         "Multicast DNS",
 352         { action => 'PARAM', proto => 'udp', dport => '5353' },
 353     ],
 354     'Munin' => [
 355         "Munin networked resource monitoring traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 357     ],
 358     'MySQL' => [
 359         "MySQL server",
 360         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 361     ],
 362     'NNTP' => [
 363         "NNTP traffic (Usenet).",
 364         { action => 'PARAM', proto => 'tcp', dport => '119' },
 365     ],
 366     'NNTPS' => [
 367         "Encrypted NNTP traffic (Usenet)",
 368         { action => 'PARAM', proto => 'tcp', dport => '563' },
 369     ],
 370     'NTP' => [
 371         "Network Time Protocol (ntpd)",
 372         { action => 'PARAM', proto => 'udp', dport => '123' },
 373     ],
 374     'OSPF' => [
 375         "OSPF multicast traffic",
 376         { action => 'PARAM', proto => '89' },
 377     ],
 378     'OpenVPN' => [
 379         "OpenVPN traffic",
 380         { action => 'PARAM', proto => 'udp', dport => '1194' },
 381     ],
 382     'PCA' => [
 383         "Symantec PCAnywere (tm)",
 384         { action => 'PARAM', proto => 'udp', dport => '5632' },
 385         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 386     ],
 387     'POP3' => [
 388         "POP3 traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '110' },
 390     ],
 391     'POP3S' => [
 392         "Encrypted POP3 traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '995' },
 394     ],
 395     'PPtP' => [
 396         "Point-to-Point Tunneling Protocol",
 397         { action => 'PARAM', proto => '47' },
 398         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 399     ],
 400     'Ping' => [
 401         "ICMP echo request",
 402         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 403     ],
 404     'PostgreSQL' => [
 405         "PostgreSQL server",
 406         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 407     ],
 408     'Printer' => [
 409         "Line Printer protocol printing",
 410         { action => 'PARAM', proto => 'tcp', dport => '515' },
 411     ],
 412     'RDP' => [
 413         "Microsoft Remote Desktop Protocol traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 415     ],
 416     'RIP' => [
 417         "Routing Information Protocol (bidirectional)",
 418         { action => 'PARAM', proto => 'udp', dport => '520' },
 419     ],
 420     'RNDC' => [
 421         "BIND remote management protocol",
 422         { action => 'PARAM', proto => 'tcp', dport => '953' },
 423     ],
 424     'Razor' => [
 425         "Razor Antispam System",
 426         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 427     ],
 428     'Rdate' => [
 429         "Remote time retrieval (rdate)",
 430         { action => 'PARAM', proto => 'tcp', dport => '37' },
 431     ],
 432     'Rsync' => [
 433         "Rsync server",
 434         { action => 'PARAM', proto => 'tcp', dport => '873' },
 435     ],
 436     'SANE' => [
 437         "SANE network scanning",
 438         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 439     ],
 440     'SMB' => [
 441         "Microsoft SMB traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 443         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 444         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 445         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 446     ],
 447     'SMBswat' => [
 448         "Samba Web Administration Tool",
 449         { action => 'PARAM', proto => 'tcp', dport => '901' },
 450     ],
 451     'SMTP' => [
 452         "Simple Mail Transfer Protocol",
 453         { action => 'PARAM', proto => 'tcp', dport => '25' },
 454     ],
 455     'SMTPS' => [
 456         "Encrypted Simple Mail Transfer Protocol",
 457         { action => 'PARAM', proto => 'tcp', dport => '465' },
 458     ],
 459     'SNMP' => [
 460         "Simple Network Management Protocol",
 461         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 462         { action => 'PARAM', proto => 'tcp', dport => '161' },
 463     ],
 464     'SPAMD' => [
 465         "Spam Assassin SPAMD traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '783' },
 467     ],
 468     'SSH' => [
 469         "Secure shell traffic",
 470         { action => 'PARAM', proto => 'tcp', dport => '22' },
 471     ],
 472     'SVN' => [
 473         "Subversion server (svnserve)",
 474         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 475     ],
 476     'SixXS' => [
 477         "SixXS IPv6 Deployment and Tunnel Broker",
 478         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 479         { action => 'PARAM', proto => 'udp', dport => '3740' },
 480         { action => 'PARAM', proto => '41' },
 481         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 482     ],
 483     'Squid' => [
 484         "Squid web proxy traffic",
 485         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 486     ],
 487     'Submission' => [
 488         "Mail message submission traffic",
 489         { action => 'PARAM', proto => 'tcp', dport => '587' },
 490     ],
 491     'Syslog' => [
 492         "Syslog protocol (RFC 5424) traffic",
 493         { action => 'PARAM', proto => 'udp', dport => '514' },
 494         { action => 'PARAM', proto => 'tcp', dport => '514' },
 495     ],
 496     'TFTP' => [
 497         "Trivial File Transfer Protocol traffic",
 498         { action => 'PARAM', proto => 'udp', dport => '69' },
 499     ],
 500     'Telnet' => [
 501         "Telnet traffic",
 502         { action => 'PARAM', proto => 'tcp', dport => '23' },
 503     ],
 504     'Telnets' => [
 505         "Telnet over SSL",
 506         { action => 'PARAM', proto => 'tcp', dport => '992' },
 507     ],
 508     'Time' => [
 509         "RFC 868 Time protocol",
 510         { action => 'PARAM', proto => 'tcp', dport => '37' },
 511     ],
 512     'Trcrt' => [
 513         "Traceroute (for up to 30 hops) traffic",
 514         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 515         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 516     ],
 517     'VNC' => [
 518         "VNC traffic for VNC display's 0 - 99",
 519         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 520     ],
 521     'VNCL' => [
 522         "VNC traffic from Vncservers to Vncviewers in listen mode",
 523         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 524     ],
 525     'Web' => [
 526         "WWW traffic (HTTP and HTTPS)",
 527         { action => 'PARAM', proto => 'tcp', dport => '80' },
 528         { action => 'PARAM', proto => 'tcp', dport => '443' },
 529     ],
 530     'Webcache' => [
 531         "Web Cache/Proxy traffic (port 8080)",
 532         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 533     ],
 534     'Webmin' => [
 535         "Webmin traffic",
 536         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 537     ],
 538     'Whois' => [
 539         "Whois (nicname, RFC 3912) traffic",
 540         { action => 'PARAM', proto => 'tcp', dport => '43' },
 541     ],
 542 };
 543
 544 my $pve_fw_parsed_macros;
 545 my $pve_fw_macro_descr;
 546 my $pve_fw_macro_ipversion = {};
 547 my $pve_fw_preferred_macro_names = {};
 548
 549 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 551
 552 my $pve_std_chains = {};
 553 my $pve_std_chains_conf = {};
 554 $pve_std_chains_conf->{4} = {
 555     'PVEFW-SET-ACCEPT-MARK' => [
 556         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 557     ],
 558     'PVEFW-DropBroadcast' => [
 559         # same as shorewall 'Broadcast'
 560         # simply DROP BROADCAST/MULTICAST/ANYCAST
 561         # we can use this to reduce logging
 562         { action => 'DROP', dsttype => 'BROADCAST' },
 563         { action => 'DROP', dsttype => 'MULTICAST' },
 564         { action => 'DROP', dsttype => 'ANYCAST' },
 565         { action => 'DROP', dest => '224.0.0.0/4' },
 566     ],
 567     'PVEFW-reject' => [
 568         # same as shorewall 'reject'
 569         { action => 'DROP', dsttype => 'BROADCAST' },
 570         { action => 'DROP', source => '224.0.0.0/4' },
 571         { action => 'DROP', proto => 'icmp' },
 572         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 573         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 574         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 575         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 576     ],
 577     'PVEFW-Drop' => [
 578         # same as shorewall 'Drop', which is equal to DROP,
 579         # but REJECT/DROP some packages to reduce logging,
 580         # and ACCEPT critical ICMP types
 581         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 582         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 583         { action => 'PVEFW-DropBroadcast' },
 584         # ACCEPT critical ICMP types
 585         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 586         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 587         # Drop packets with INVALID state
 588         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 589         # Drop Microsoft SMB noise
 590         { action => 'DROP', proto => 'udp', dport => '135,445' },
 591         { action => 'DROP', proto => 'udp', dport => '137:139' },
 592         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 593         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 594         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 595         # Drop new/NotSyn traffic so that it doesn't get logged
 596         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 597         # Drop DNS replies
 598         { action => 'DROP', proto => 'udp', sport => 53 },
 599     ],
 600     'PVEFW-Reject' => [
 601         # same as shorewall 'Reject', which is equal to Reject,
 602         # but REJECT/DROP some packages to reduce logging,
 603         # and ACCEPT critical ICMP types
 604         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 605         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 606         { action => 'PVEFW-DropBroadcast' },
 607         # ACCEPT critical ICMP types
 608         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 609         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 610         # Drop packets with INVALID state
 611         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 612         # Drop Microsoft SMB noise
 613         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 614         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 615         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 616         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 617         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 618         # Drop new/NotSyn traffic so that it doesn't get logged
 619         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 620         # Drop DNS replies
 621         { action => 'DROP', proto => 'udp', sport => 53 },
 622     ],
 623     'PVEFW-tcpflags' => [
 624         # same as shorewall tcpflags action.
 625         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 626         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 627         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 628         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 629         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 630         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 631     ],
 632     'PVEFW-smurfs' => [
 633         # same as shorewall smurfs action
 634         # Filter packets for smurfs (packets with a broadcast address as the source).
 635         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 636         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 637         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 638     ],
 639     'PVEFW-smurflog' => [
 640         { action => 'DROP', logmsg => 'DROP: ' },
 641     ],
 642     'PVEFW-logflags' => [
 643         { action => 'DROP', logmsg => 'DROP: ' },
 644     ],
 645 };
 646
 647 $pve_std_chains_conf->{6} = {
 648     'PVEFW-SET-ACCEPT-MARK' => [
 649         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 650     ],
 651     'PVEFW-DropBroadcast' => [
 652         # same as shorewall 'Broadcast'
 653         # simply DROP BROADCAST/MULTICAST/ANYCAST
 654         # we can use this to reduce logging
 655         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 656         # ipv6 addrtype does not work with kernel 2.6.32
 657         #{ action => 'DROP', dsttype => 'MULTICAST' },
 658         #{ action => 'DROP', dsttype => 'ANYCAST' },
 659         { action => 'DROP', dest => 'ff00::/8' },
 660         #{ action => 'DROP', dest => '224.0.0.0/4' },
 661     ],
 662     'PVEFW-reject' => [
 663         # same as shorewall 'reject'
 664         #{ action => 'DROP', dsttype => 'BROADCAST' },
 665         #{ action => 'DROP', source => '224.0.0.0/4' },
 666         { action => 'DROP', proto => 'icmpv6' },
 667         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 668         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 669         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 670         #"-j REJECT --reject-with icmp-host-prohibited",
 671     ],
 672     'PVEFW-Drop' => [
 673         # same as shorewall 'Drop', which is equal to DROP,
 674         # but REJECT/DROP some packages to reduce logging,
 675         # and ACCEPT critical ICMP types
 676         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 677         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 678         { action => 'PVEFW-DropBroadcast' },
 679         # ACCEPT critical ICMP types
 680         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 681         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 682         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 683         # Drop packets with INVALID state
 684         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 685         # Drop Microsoft SMB noise
 686         { action => 'DROP', proto => 'udp', dport => '135,445' },
 687         { action => 'DROP', proto => 'udp', dport => '137:139'},
 688         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 689         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 690         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 691         # Drop new/NotSyn traffic so that it doesn't get logged
 692         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 693         # Drop DNS replies
 694         { action => 'DROP', proto => 'udp', sport => 53 },
 695     ],
 696     'PVEFW-Reject' => [
 697         # same as shorewall 'Reject', which is equal to Reject,
 698         # but REJECT/DROP some packages to reduce logging,
 699         # and ACCEPT critical ICMP types
 700         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 701         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 702         { action => 'PVEFW-DropBroadcast' },
 703         # ACCEPT critical ICMP types
 704         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 705         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 706         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 707         # Drop packets with INVALID state
 708         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 709         # Drop Microsoft SMB noise
 710         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 711         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 712         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 713         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 714         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 715         # Drop new/NotSyn traffic so that it doesn't get logged
 716         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 717         # Drop DNS replies
 718         { action => 'DROP', proto => 'udp', sport => 53 },
 719     ],
 720     'PVEFW-tcpflags' => [
 721         # same as shorewall tcpflags action.
 722         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 723         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 724         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 725         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 726         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 727         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 728     ],
 729     'PVEFW-logflags' => [
 730         { action => 'DROP', logmsg => 'DROP: ' },
 731     ],
 732 };
 733
 734 # iptables -p icmp -h
 735 my $icmp_type_names = {
 736     any => 1,
 737     'echo-reply' => 1,
 738     'destination-unreachable' => 1,
 739     'network-unreachable' => 1,
 740     'host-unreachable' => 1,
 741     'protocol-unreachable' => 1,
 742     'port-unreachable' => 1,
 743     'fragmentation-needed' => 1,
 744     'source-route-failed' => 1,
 745     'network-unknown' => 1,
 746     'host-unknown' => 1,
 747     'network-prohibited' => 1,
 748     'host-prohibited' => 1,
 749     'TOS-network-unreachable' => 1,
 750     'TOS-host-unreachable' => 1,
 751     'communication-prohibited' => 1,
 752     'host-precedence-violation' => 1,
 753     'precedence-cutoff' => 1,
 754     'source-quench' => 1,
 755     'redirect' => 1,
 756     'network-redirect' => 1,
 757     'host-redirect' => 1,
 758     'TOS-network-redirect' => 1,
 759     'TOS-host-redirect' => 1,
 760     'echo-request' => 1,
 761     'router-advertisement' => 1,
 762     'router-solicitation' => 1,
 763     'time-exceeded' => 1,
 764     'ttl-zero-during-transit' => 1,
 765     'ttl-zero-during-reassembly' => 1,
 766     'parameter-problem' => 1,
 767     'ip-header-bad' => 1,
 768     'required-option-missing' => 1,
 769     'timestamp-request' => 1,
 770     'timestamp-reply' => 1,
 771     'address-mask-request' => 1,
 772     'address-mask-reply' => 1,
 773 };
 774
 775 # ip6tables -p icmpv6 -h
 776
 777 my $icmpv6_type_names = {
 778     'any' => 1,
 779     'destination-unreachable' => 1,
 780     'no-route' => 1,
 781     'communication-prohibited' => 1,
 782     'address-unreachable' => 1,
 783     'port-unreachable' => 1,
 784     'packet-too-big' => 1,
 785     'time-exceeded' => 1,
 786     'ttl-zero-during-transit' => 1,
 787     'ttl-zero-during-reassembly' => 1,
 788     'parameter-problem' => 1,
 789     'bad-header' => 1,
 790     'unknown-header-type' => 1,
 791     'unknown-option' => 1,
 792     'echo-request' => 1,
 793     'echo-reply' => 1,
 794     'router-solicitation' => 1,
 795     'router-advertisement' => 1,
 796     'neighbor-solicitation' => 1,
 797     'neighbour-solicitation' => 1,
 798     'neighbor-advertisement' => 1,
 799     'neighbour-advertisement' => 1,
 800     'redirect' => 1,
 801 };
 802
 803 sub init_firewall_macros {
 804
 805     $pve_fw_parsed_macros = {};
 806
 807     my $parse = sub {
 808         my ($k, $macro) = @_;
 809         my $lc_name = lc($k);
 810         $pve_fw_macro_ipversion->{$k} = 0;
 811         while (!ref($macro->[0])) {
 812             my $desc = shift @$macro;
 813             if ($desc eq 'ipv4only') {
 814                 $pve_fw_macro_ipversion->{$k} = 4;
 815             } elsif ($desc eq 'ipv6only') {
 816                 $pve_fw_macro_ipversion->{$k} = 6;
 817             } else {
 818                 $pve_fw_macro_descr->{$k} = $desc;
 819             }
 820         }
 821         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 822         $pve_fw_parsed_macros->{$k} = $macro;
 823     };
 824
 825     foreach my $k (keys %$pve_fw_macros) {
 826         &$parse($k, $pve_fw_macros->{$k});
 827     }
 828
 829     foreach my $k (keys %$pve_ipv6fw_macros) {
 830         next if $pve_fw_parsed_macros->{$k};
 831         &$parse($k, $pve_ipv6fw_macros->{$k});
 832         $pve_fw_macro_ipversion->{$k} = 6;
 833     }
 834 }
 835
 836 init_firewall_macros();
 837
 838 sub get_macros {
 839     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 840 }
 841
 842 my $etc_services;
 843
 844 sub get_etc_services {
 845
 846     return $etc_services if $etc_services;
 847
 848     my $filename = "/etc/services";
 849
 850     my $fh = IO::File->new($filename, O_RDONLY);
 851     if (!$fh) {
 852         warn "unable to read '$filename' - $!\n";
 853         return {};
 854     }
 855
 856     my $services = {};
 857
 858     while (my $line = <$fh>) {
 859         chomp ($line);
 860         next if $line =~m/^#/;
 861         next if ($line =~m/^\s*$/);
 862
 863         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 864             $services->{byid}->{$2}->{name} = $1;
 865             $services->{byid}->{$2}->{port} = $2;
 866             $services->{byid}->{$2}->{$3} = 1;
 867             $services->{byname}->{$1} = $services->{byid}->{$2};
 868         }
 869     }
 870
 871     close($fh);
 872
 873     $etc_services = $services;
 874
 875
 876     return $etc_services;
 877 }
 878
 879 sub parse_protocol_file {
 880     my ($filename) = @_;
 881
 882     my $fh = IO::File->new($filename, O_RDONLY);
 883     if (!$fh) {
 884         warn "unable to read '$filename' - $!\n";
 885         return {};
 886     }
 887
 888     my $protocols = {};
 889
 890     while (my $line = <$fh>) {
 891         chomp ($line);
 892         next if $line =~m/^#/;
 893         next if ($line =~m/^\s*$/);
 894
 895         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 896             $protocols->{byid}->{$2}->{name} = $1;
 897             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 898         }
 899     }
 900
 901     close($fh);
 902
 903     return $protocols;
 904 }
 905
 906 my $etc_protocols;
 907
 908 sub get_etc_protocols {
 909     return $etc_protocols if $etc_protocols;
 910
 911     my $protocols = parse_protocol_file('/etc/protocols');
 912
 913     # add special case for ICMP v6
 914     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 915     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 916
 917     $etc_protocols = $protocols;
 918
 919     return $etc_protocols;
 920 }
 921
 922 my $etc_ethertypes;
 923
 924 sub get_etc_ethertypes {
 925     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 926         if !$etc_ethertypes;
 927     return $etc_ethertypes;
 928 }
 929
 930 my $__local_network;
 931
 932 sub local_network {
 933     my ($new_value) = @_;
 934
 935     $__local_network = $new_value if defined($new_value);
 936
 937     return $__local_network if defined($__local_network);
 938
 939     eval {
 940         my $nodename = PVE::INotify::nodename();
 941
 942         my $ip = PVE::Cluster::remote_node_ip($nodename);
 943
 944         my $testip = Net::IP->new($ip);
 945
 946         my $isv6 = $testip->version == 6;
 947         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 948                            : PVE::ProcFSTools::read_proc_net_route();
 949         foreach my $entry (@$routes) {
 950             my $mask;
 951             if ($isv6) {
 952                 $mask = $entry->{prefix};
 953                 next if !$mask; # skip the default route...
 954             } else {
 955                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 956                 next if !defined($mask);
 957             }
 958             my $cidr = "$entry->{dest}/$mask";
 959             my $testnet = Net::IP->new($cidr);
 960             my $overlap = $testnet->overlaps($testip);
 961             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 962                 $overlap == $Net::IP::IP_IDENTICAL)
 963             {
 964                 $__local_network = $cidr;
 965                 return;
 966             }
 967         }
 968     };
 969     warn $@ if $@;
 970
 971     return $__local_network;
 972 }
 973
 974 # ipset names are limited to 31 characters,
 975 # and we use '-v4' or '-v6' to indicate IP versions,
 976 # and we use '_swap' suffix for atomic update,
 977 # for example PVEFW-${VMID}-${ipset_name}_swap
 978
 979 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 980
 981 sub compute_ipset_chain_name {
 982     my ($vmid, $ipset_name, $ipversion) = @_;
 983
 984     $vmid = 0 if !defined($vmid);
 985
 986     my $id = "$vmid-${ipset_name}-v$ipversion";
 987
 988     if (length($id) > $max_iptables_ipset_name_length) {
 989         $id = PVE::Tools::fnv31a_hex($id);
 990     }
 991
 992     return "PVEFW-$id";
 993 }
 994
 995 sub compute_ipfilter_ipset_name {
 996     my ($iface) = @_;
 997
 998     return "ipfilter-$iface";
 999 }
1000
1001 sub parse_address_list {
1002     my ($str) = @_;
1003
1004     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1005         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1006         return;
1007     }
1008
1009     if ($str =~ m/^${ip_alias_pattern}$/) {
1010         die "alias name too long\n" if length($str) > $max_alias_name_length;
1011         return;
1012     }
1013
1014     my $count = 0;
1015     my $iprange = 0;
1016     my $ipversion;
1017
1018     my @elements = split(/,/, $str);
1019     die "extraneous commas in list\n" if $str ne join(',', @elements);
1020     foreach my $elem (@elements) {
1021         $count++;
1022         my $ip = Net::IP->new($elem);
1023         if (!$ip) {
1024             my $err = Net::IP::Error();
1025             die "invalid IP address: $err\n";
1026         }
1027         $iprange = 1 if $elem =~ m/-/;
1028
1029         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1030
1031         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1032             if $ipversion && ($new_ipversion != $ipversion);
1033
1034         $ipversion = $new_ipversion;
1035     }
1036
1037     die "you can't use a range in a list\n" if $iprange && $count > 1;
1038
1039     return $ipversion;
1040 }
1041
1042 sub parse_port_name_number_or_range {
1043     my ($str, $dport) = @_;
1044
1045     my $services = PVE::Firewall::get_etc_services();
1046     my $count = 0;
1047     my $icmp_port = 0;
1048
1049     my @elements = split(/,/, $str);
1050     die "extraneous commas in list\n" if $str ne join(',', @elements);
1051     foreach my $item (@elements) {
1052         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1053             $count += 2;
1054             my ($port1, $port2) = ($1, $2);
1055             die "invalid port '$port1'\n" if $port1 > 65535;
1056             die "invalid port '$port2'\n" if $port2 > 65535;
1057             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1058         } elsif ($item =~ m/^([0-9]+)$/) {
1059             $count += 1;
1060             my $port = $1;
1061             die "invalid port '$port'\n" if $port > 65535;
1062         } else {
1063             if ($dport && $icmp_type_names->{$item}) {
1064                 $icmp_port = 1;
1065             } elsif ($dport && $icmpv6_type_names->{$item}) {
1066                 $icmp_port = 1;
1067             } else {
1068                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1069             }
1070         }
1071     }
1072
1073     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1074
1075     # I really don't like to use the word number here, but it's the only thing
1076     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1077     # one and not as 100...
1078     die "too many entries in port list (> 15 numbers)\n"
1079         if $count > 15;
1080
1081     return (scalar(@elements) > 1);
1082 }
1083
1084 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1085 sub pve_fw_verify_sport_spec {
1086    my ($portstr) = @_;
1087
1088    parse_port_name_number_or_range($portstr, 0);
1089
1090    return $portstr;
1091 }
1092
1093 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1094 sub pve_fw_verify_dport_spec {
1095    my ($portstr) = @_;
1096
1097    parse_port_name_number_or_range($portstr, 1);
1098
1099    return $portstr;
1100 }
1101
1102 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1103 sub pve_fw_verify_addr_spec {
1104    my ($list) = @_;
1105
1106    parse_address_list($list);
1107
1108    return $list;
1109 }
1110
1111 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1112 sub pve_fw_verify_protocol_spec {
1113    my ($proto) = @_;
1114
1115    my $protocols = get_etc_protocols();
1116
1117    die "unknown protocol '$proto'\n" if $proto &&
1118        !(defined($protocols->{byname}->{$proto}) ||
1119          defined($protocols->{byid}->{$proto}));
1120
1121    return $proto;
1122 }
1123
1124
1125 # helper function for API
1126
1127 sub copy_opject_with_digest {
1128     my ($object) = @_;
1129
1130     my $sha = Digest::SHA->new('sha1');
1131
1132     my $res = {};
1133     foreach my $k (sort keys %$object) {
1134         my $v = $object->{$k};
1135         next if !defined($v);
1136         $res->{$k} = $v;
1137         $sha->add($k, ':', $v, "\n");
1138     }
1139
1140     my $digest = $sha->hexdigest;
1141
1142     $res->{digest} = $digest;
1143
1144     return wantarray ? ($res, $digest) : $res;
1145 }
1146
1147 sub copy_list_with_digest {
1148     my ($list) = @_;
1149
1150     my $sha = Digest::SHA->new('sha1');
1151
1152     my $res = [];
1153     foreach my $entry (@$list) {
1154         my $data = {};
1155         foreach my $k (sort keys %$entry) {
1156             my $v = $entry->{$k};
1157             next if !defined($v);
1158             $data->{$k} = $v;
1159             # Note: digest ignores refs ($rule->{errors})
1160             # since Digest::SHA expects a series of bytes,
1161             #  we have to encode the value here to prevent errors when
1162             #  using utf8 characters (eg. in comments)
1163             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1164         }
1165         push @$res, $data;
1166     }
1167
1168     my $digest = $sha->hexdigest;
1169
1170     foreach my $entry (@$res) {
1171         $entry->{digest} = $digest;
1172     }
1173
1174     return wantarray ? ($res, $digest) : $res;
1175 }
1176
1177 our $cluster_option_properties = {
1178     enable => {
1179         description => "Enable or disable the firewall cluster wide.",
1180         type => 'integer',
1181         minimum => 0,
1182         optional => 1,
1183     },
1184     ebtables => {
1185         description => "Enable ebtables rules cluster wide.",
1186         type => 'boolean',
1187         default => 1,
1188         optional => 1,
1189     },
1190     policy_in => {
1191         description => "Input policy.",
1192         type => 'string',
1193         optional => 1,
1194         enum => ['ACCEPT', 'REJECT', 'DROP'],
1195     },
1196     policy_out => {
1197         description => "Output policy.",
1198         type => 'string',
1199         optional => 1,
1200         enum => ['ACCEPT', 'REJECT', 'DROP'],
1201     },
1202 };
1203
1204 our $host_option_properties = {
1205     enable => {
1206         description => "Enable host firewall rules.",
1207         type => 'boolean',
1208         optional => 1,
1209     },
1210     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1211         description => "Log level for incoming traffic." }),
1212     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1213         description => "Log level for outgoing traffic." }),
1214     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1215         description => "Log level for illegal tcp flags filter." }),
1216     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1217         description => "Log level for SMURFS filter." }),
1218     nosmurfs => {
1219         description => "Enable SMURFS filter.",
1220         type => 'boolean',
1221         optional => 1,
1222     },
1223     tcpflags => {
1224         description => "Filter illegal combinations of TCP flags.",
1225         type => 'boolean',
1226         optional => 1,
1227     },
1228     nf_conntrack_max => {
1229         description => "Maximum number of tracked connections.",
1230         type => 'integer',
1231         optional => 1,
1232         minimum => 32768,
1233     },
1234     nf_conntrack_tcp_timeout_established => {
1235         description => "Conntrack established timeout.",
1236         type => 'integer',
1237         optional => 1,
1238         minimum => 7875,
1239     },
1240     ndp => {
1241         description => "Enable NDP.",
1242         type => 'boolean',
1243         optional => 1,
1244     },
1245     nf_conntrack_allow_invalid => {
1246         description => "Allow invalid packets on connection tracking.",
1247         type => 'boolean',
1248         default => 0,
1249         optional => 1,
1250     },
1251     log_nf_conntrack => {
1252         description => "Enable logging of conntrack information.",
1253         type => 'boolean',
1254         default => 0,
1255         optional => 1
1256     },
1257 };
1258
1259 our $vm_option_properties = {
1260     enable => {
1261         description => "Enable/disable firewall rules.",
1262         type => 'boolean',
1263         optional => 1,
1264     },
1265     macfilter => {
1266         description => "Enable/disable MAC address filter.",
1267         type => 'boolean',
1268         optional => 1,
1269     },
1270     dhcp => {
1271         description => "Enable DHCP.",
1272         type => 'boolean',
1273         optional => 1,
1274     },
1275     ndp => {
1276         description => "Enable NDP.",
1277         type => 'boolean',
1278         optional => 1,
1279     },
1280     radv => {
1281         description => "Allow sending Router Advertisement.",
1282         type => 'boolean',
1283         optional => 1,
1284     },
1285     ipfilter => {
1286         description => "Enable default IP filters. " .
1287            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1288            "for every interface. Such ipsets implicitly contain sane default " .
1289            "restrictions such as restricting IPv6 link local addresses to " .
1290            "the one derived from the interface's MAC address. For containers " .
1291            "the configured IP addresses will be implicitly added.",
1292         type => 'boolean',
1293         optional => 1,
1294     },
1295     policy_in => {
1296         description => "Input policy.",
1297         type => 'string',
1298         optional => 1,
1299         enum => ['ACCEPT', 'REJECT', 'DROP'],
1300     },
1301     policy_out => {
1302         description => "Output policy.",
1303         type => 'string',
1304         optional => 1,
1305         enum => ['ACCEPT', 'REJECT', 'DROP'],
1306     },
1307     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1308         description => "Log level for incoming traffic." }),
1309     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1310         description => "Log level for outgoing traffic." }),
1311
1312 };
1313
1314
1315 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.";
1316
1317 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.";
1318
1319 my $rule_properties = {
1320     pos => {
1321         description => "Update rule at position <pos>.",
1322         type => 'integer',
1323         minimum => 0,
1324         optional => 1,
1325     },
1326     digest => get_standard_option('pve-config-digest'),
1327     type => {
1328         description => "Rule type.",
1329         type => 'string',
1330         optional => 1,
1331         enum => ['in', 'out', 'group'],
1332     },
1333     action => {
1334         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1335         type => 'string',
1336         optional => 1,
1337         pattern => $security_group_name_pattern,
1338         maxLength => 20,
1339         minLength => 2,
1340     },
1341     macro => {
1342         description => "Use predefined standard macro.",
1343         type => 'string',
1344         optional => 1,
1345         maxLength => 128,
1346     },
1347     iface => get_standard_option('pve-iface', {
1348         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.",
1349         optional => 1
1350     }),
1351     source => {
1352         description => "Restrict packet source address. $addr_list_descr",
1353         type => 'string', format => 'pve-fw-addr-spec',
1354         optional => 1,
1355     },
1356     dest => {
1357         description => "Restrict packet destination address. $addr_list_descr",
1358         type => 'string', format => 'pve-fw-addr-spec',
1359         optional => 1,
1360     },
1361     proto => {
1362         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1363         type => 'string', format => 'pve-fw-protocol-spec',
1364         optional => 1,
1365     },
1366     enable => {
1367         description => "Flag to enable/disable a rule.",
1368         type => 'integer',
1369         minimum => 0,
1370         optional => 1,
1371     },
1372     log => get_standard_option('pve-fw-loglevel', {
1373         description => "Log level for firewall rule.",
1374     }),
1375     sport => {
1376         description => "Restrict TCP/UDP source port. $port_descr",
1377         type => 'string', format => 'pve-fw-sport-spec',
1378         optional => 1,
1379     },
1380     dport => {
1381         description => "Restrict TCP/UDP destination port. $port_descr",
1382         type => 'string', format => 'pve-fw-dport-spec',
1383         optional => 1,
1384     },
1385     comment => {
1386         description => "Descriptive comment.",
1387         type => 'string',
1388         optional => 1,
1389     },
1390 };
1391
1392 sub add_rule_properties {
1393     my ($properties) = @_;
1394
1395     foreach my $k (keys %$rule_properties) {
1396         my $h = $rule_properties->{$k};
1397         # copy data, so that we can modify later without side effects
1398         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1399     }
1400
1401     return $properties;
1402 }
1403
1404 sub delete_rule_properties {
1405     my ($rule, $delete_str) = @_;
1406
1407     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1408         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1409             if !defined($rule_properties->{$opt});
1410         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1411             if $opt eq 'type' || $opt eq 'action';
1412         delete $rule->{$opt};
1413     }
1414
1415     return $rule;
1416 }
1417
1418 my $apply_macro = sub {
1419     my ($macro_name, $param, $verify, $ipversion) = @_;
1420
1421     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1422     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1423
1424     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1425         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1426     }
1427
1428     # skip macros which are specific to another ipversion
1429     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1430         return if $ipversion != $required;
1431     }
1432
1433     my $rules = [];
1434
1435     foreach my $templ (@$macro_rules) {
1436         my $rule = {};
1437         my $param_used = {};
1438         foreach my $k (keys %$templ) {
1439             my $v = $templ->{$k};
1440             if ($v eq 'PARAM') {
1441                 $v = $param->{$k};
1442                 $param_used->{$k} = 1;
1443             } elsif ($v eq 'DEST') {
1444                 $v = $param->{dest};
1445                 $param_used->{dest} = 1;
1446             } elsif ($v eq 'SOURCE') {
1447                 $v = $param->{source};
1448                 $param_used->{source} = 1;
1449             }
1450
1451             if (!defined($v)) {
1452                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1453                 raise_param_exc({ macro => $msg }) if $verify;
1454                 die "$msg\n";
1455             }
1456             $rule->{$k} = $v;
1457         }
1458         foreach my $k (keys %$param) {
1459             next if $k eq 'macro';
1460             next if !defined($param->{$k});
1461             next if $param_used->{$k};
1462             if (defined($rule->{$k})) {
1463                 if ($rule->{$k} ne $param->{$k}) {
1464                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1465                     raise_param_exc({ $k => $msg }) if $verify;
1466                     die "$msg\n";
1467                 }
1468             } else {
1469                 $rule->{$k} = $param->{$k};
1470             }
1471         }
1472         push @$rules, $rule;
1473     }
1474
1475     return $rules;
1476 };
1477
1478 my $rule_env_iface_lookup = {
1479     'ct' => 1,
1480     'vm' => 1,
1481     'group' => 0,
1482     'cluster' => 1,
1483     'host' => 1,
1484 };
1485
1486 sub verify_rule {
1487     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1488
1489     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1490
1491     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1492     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1493
1494     my $errors = $rule->{errors} || {};
1495
1496     my $error_count = 0;
1497
1498     my $add_error = sub {
1499         my ($param, $msg)  = @_;
1500         chomp $msg;
1501         raise_param_exc({ $param => $msg }) if !$noerr;
1502         $error_count++;
1503         $errors->{$param} = $msg if !$errors->{$param};
1504     };
1505
1506     my $ipversion;
1507     my $set_ip_version = sub {
1508         my $vers = shift;
1509         if ($vers) {
1510             die "detected mixed ipv4/ipv6 adresses in rule\n"
1511                 if $ipversion && ($vers != $ipversion);
1512             $ipversion = $vers;
1513         }
1514     };
1515
1516     my $check_ipset_or_alias_property = sub {
1517         my ($name, $expected_ipversion) = @_;
1518
1519         if (my $value = $rule->{$name}) {
1520             if ($value =~ m/^\+/) {
1521                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1522                     &$add_error($name, "no such ipset '$1'")
1523                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1524
1525                 } else {
1526                     &$add_error($name, "invalid ipset name '$value'");
1527                 }
1528             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1529                 my $alias = lc($value);
1530                 &$add_error($name, "no such alias '$value'")
1531                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1532                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1533                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1534
1535                 &$set_ip_version($e->{ipversion});
1536             }
1537         }
1538     };
1539
1540     my $type = $rule->{type};
1541     my $action = $rule->{action};
1542
1543     &$add_error('type', "missing property") if !$type;
1544     &$add_error('action', "missing property") if !$action;
1545
1546     if ($type) {
1547         if ($type eq  'in' || $type eq 'out') {
1548             &$add_error('action', "unknown action '$action'")
1549                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1550         } elsif ($type eq 'group') {
1551             &$add_error('type', "security groups not allowed")
1552                 if !$allow_groups;
1553             &$add_error('action', "invalid characters in security group name")
1554                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1555         } else {
1556             &$add_error('type', "unknown rule type '$type'");
1557         }
1558     }
1559
1560     if ($rule->{iface}) {
1561         &$add_error('type', "parameter -i not allowed for this rule type")
1562             if !$allow_iface;
1563         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1564         &$add_error('iface', $@) if $@;
1565         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1566             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1567                 if $rule->{iface} !~  m/^net(\d+)$/;
1568         }
1569     }
1570
1571     if ($rule->{macro}) {
1572         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1573             $rule->{macro} = $preferred_name;
1574         } else {
1575             &$add_error('macro', "unknown macro '$rule->{macro}'");
1576         }
1577     }
1578
1579     if ($rule->{proto}) {
1580         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1581         &$add_error('proto', $@) if $@;
1582         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1583         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1584     }
1585
1586     if ($rule->{dport}) {
1587         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1588         &$add_error('dport', $@) if $@;
1589         my $proto = $rule->{proto};
1590         &$add_error('proto', "missing property - 'dport' requires this property")
1591             if !$proto;
1592         &$add_error('dport', "protocol '$proto' does not support ports")
1593             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1594                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1595     }
1596
1597     if ($rule->{sport}) {
1598         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1599         &$add_error('sport', $@) if $@;
1600         my $proto = $rule->{proto};
1601         &$add_error('proto', "missing property - 'sport' requires this property")
1602             if !$proto;
1603         &$add_error('sport', "protocol '$proto' does not support ports")
1604             if !$PROTOCOLS_WITH_PORTS->{$proto};
1605     }
1606
1607     if ($rule->{source}) {
1608         eval {
1609             my $source_ipversion = parse_address_list($rule->{source});
1610             &$set_ip_version($source_ipversion);
1611         };
1612         &$add_error('source', $@) if $@;
1613         &$check_ipset_or_alias_property('source', $ipversion);
1614     }
1615
1616     if ($rule->{dest}) {
1617         eval {
1618             my $dest_ipversion = parse_address_list($rule->{dest});
1619             &$set_ip_version($dest_ipversion);
1620         };
1621         &$add_error('dest', $@) if $@;
1622         &$check_ipset_or_alias_property('dest', $ipversion);
1623     }
1624
1625     $rule->{ipversion} = $ipversion if $ipversion;
1626
1627     if ($rule->{macro} && !$error_count) {
1628         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1629         if (my $err = $@) {
1630             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1631                 my $eh = $err->{errors};
1632                 foreach my $p (keys %$eh) {
1633                     &$add_error($p, $eh->{$p});
1634                 }
1635             } else {
1636                 &$add_error('macro', "$err");
1637             }
1638         }
1639     }
1640
1641     $rule->{errors} = $errors if $error_count;
1642
1643     return $rule;
1644 }
1645
1646 sub copy_rule_data {
1647     my ($rule, $param) = @_;
1648
1649     foreach my $k (keys %$rule_properties) {
1650         if (defined(my $v = $param->{$k})) {
1651             if ($v eq '' || $v eq '-') {
1652                 delete $rule->{$k};
1653             } else {
1654                 $rule->{$k} = $v;
1655             }
1656         }
1657     }
1658
1659     return $rule;
1660 }
1661
1662 sub rules_modify_permissions {
1663     my ($rule_env) = @_;
1664
1665     if ($rule_env eq 'host') {
1666         return {
1667             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1668         };
1669     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1670         return {
1671             check => ['perm', '/', [ 'Sys.Modify' ]],
1672         };
1673     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1674         return {
1675             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1676         }
1677     }
1678
1679     return undef;
1680 }
1681
1682 sub rules_audit_permissions {
1683     my ($rule_env) = @_;
1684
1685     if ($rule_env eq 'host') {
1686         return {
1687             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1688         };
1689     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1690         return {
1691             check => ['perm', '/', [ 'Sys.Audit' ]],
1692         };
1693     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1694         return {
1695             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1696         }
1697     }
1698
1699     return undef;
1700 }
1701
1702 # core functions
1703 my $bridge_firewall_enabled = 0;
1704
1705 sub enable_bridge_firewall {
1706
1707     return if $bridge_firewall_enabled; # only once
1708
1709     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1710     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1711
1712     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1713     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1714
1715     $bridge_firewall_enabled = 1;
1716 }
1717
1718 sub iptables_restore_cmdlist {
1719     my ($cmdlist) = @_;
1720
1721     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1722 }
1723
1724 sub ip6tables_restore_cmdlist {
1725     my ($cmdlist) = @_;
1726
1727     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1728 }
1729
1730 sub ipset_restore_cmdlist {
1731     my ($cmdlist) = @_;
1732
1733     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1734 }
1735
1736 sub ebtables_restore_cmdlist {
1737     my ($cmdlist) = @_;
1738
1739     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1740 }
1741
1742 sub iptables_get_chains {
1743     my ($iptablescmd) = @_;
1744
1745     $iptablescmd = "iptables" if !$iptablescmd;
1746
1747     my $res = {};
1748
1749     # check what chains we want to track
1750     my $is_pvefw_chain = sub {
1751         my $name = shift;
1752
1753         return 1 if $name =~ m/^PVEFW-\S+$/;
1754
1755         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1756
1757         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1758
1759         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1760         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1761
1762         return undef;
1763     };
1764
1765     my $table = '';
1766
1767     my $hooks = {};
1768
1769     my $parser = sub {
1770         my $line = shift;
1771
1772         return if $line =~ m/^#/;
1773         return if $line =~ m/^\s*$/;
1774
1775         if ($line =~ m/^\*(\S+)$/) {
1776             $table = $1;
1777             return;
1778         }
1779
1780         return if $table ne 'filter';
1781
1782         if ($line =~ m/^:(\S+)\s/) {
1783             my $chain = $1;
1784             return if !&$is_pvefw_chain($chain);
1785             $res->{$chain} = "unknown";
1786         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1787             my ($chain, $sig) = ($1, $2);
1788             return if !&$is_pvefw_chain($chain);
1789             $res->{$chain} = $sig;
1790         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1791             $hooks->{$1} = 1;
1792         } else {
1793             # simply ignore the rest
1794             return;
1795         }
1796     };
1797
1798     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1799
1800     return wantarray ? ($res, $hooks) : $res;
1801 }
1802
1803 sub iptables_chain_digest {
1804     my ($rules) = @_;
1805     my $digest = Digest::SHA->new('sha1');
1806     foreach my $rule (@$rules) { # order is important
1807         $digest->add($rule);
1808     }
1809     return $digest->b64digest;
1810 }
1811
1812 sub ipset_chain_digest {
1813     my ($rules) = @_;
1814
1815     my $digest = Digest::SHA->new('sha1');
1816     foreach my $rule (sort @$rules) { # note: sorted
1817         $digest->add($rule);
1818     }
1819     return $digest->b64digest;
1820 }
1821
1822 sub ipset_get_chains {
1823
1824     my $res = {};
1825     my $chains = {};
1826
1827     my $parser = sub {
1828         my $line = shift;
1829
1830         return if $line =~ m/^#/;
1831         return if $line =~ m/^\s*$/;
1832         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1833             my $chain = $1;
1834             $line =~ s/\s+$//; # delete trailing white space
1835             push @{$chains->{$chain}}, $line;
1836         } else {
1837             # simply ignore the rest
1838             return;
1839         }
1840     };
1841
1842     run_command("/sbin/ipset save", outfunc => $parser);
1843
1844     # compute digest for each chain
1845     foreach my $chain (keys %$chains) {
1846         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1847     }
1848
1849     return $res;
1850 }
1851
1852 sub ebtables_get_chains {
1853
1854     my $res = {};
1855     my $chains = {};
1856     my $parser = sub {
1857         my $line = shift;
1858         return if $line =~ m/^#/;
1859         return if $line =~ m/^\s*$/;
1860         if ($line =~ m/^:(\S+)\s\S+$/) {
1861             # Make sure we know chains exist even if they're empty.
1862             $chains->{$1} //= [];
1863         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1864             my $chain = $1;
1865             $line =~ s/\s+$//;
1866             push @{$chains->{$chain}}, $line;
1867         } else {
1868             # simply ignore the rest
1869             return;
1870         }
1871     };
1872
1873     run_command("/sbin/ebtables-save", outfunc => $parser);
1874     # compute digest for each chain and store rules as well
1875     foreach my $chain (keys %$chains) {
1876         $res->{$chain}->{rules} = $chains->{$chain};
1877         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1878     }
1879     return $res;
1880 }
1881
1882 # substitude action of rule according to action hash
1883 sub rule_substitude_action {
1884     my ($rule, $actions) = @_;
1885
1886     if (my $action = $rule->{action}) {
1887         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1888     }
1889 }
1890
1891 # generate a src or dst match
1892 # $dir(ection) is either d or s
1893 sub ipt_gen_src_or_dst_match {
1894     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1895
1896     my $srcdst;
1897     if ($dir eq 's') {
1898         $srcdst = "src";
1899     } elsif ($dir eq 'd') {
1900         $srcdst = "dst";
1901     } else {
1902         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1903     }
1904
1905     my $match;
1906     if ($adr =~ m/^\+/) {
1907         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1908             my $name = $1;
1909             my $ipset_chain;
1910             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1911                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1912             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1913                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1914             } else {
1915                 die "no such ipset '$name'\n";
1916             }
1917             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1918         } else {
1919             die "invalid security group name '$adr'\n";
1920         }
1921     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1922         my $alias = lc($adr);
1923         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1924         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1925         die "no such alias '$adr'\n" if !$e;
1926         $match = "-${dir} $e->{cidr}";
1927     } elsif ($adr =~ m/\-/){
1928         $match = "-m iprange --${srcdst}-range $adr";
1929     } else {
1930         $match = "-${dir} $adr";
1931     }
1932
1933     return $match;
1934 }
1935
1936 # convert a %rule to an array of iptables commands
1937 sub ipt_rule_to_cmds {
1938     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1939
1940     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1941
1942     my @match = ();
1943
1944     if (defined $rule->{match}) {
1945         push @match, $rule->{match};
1946     } else {
1947         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1948         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1949
1950         if ($rule->{source}) {
1951             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1952         }
1953         if ($rule->{dest}) {
1954             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1955         }
1956
1957         if (my $proto = $rule->{proto}) {
1958             push @match, "-p $proto";
1959
1960             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1961             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1962
1963             my $add_dport = sub {
1964                 return if !$rule->{dport};
1965
1966                 if ($proto eq 'icmp') {
1967                     # Note: we use dport to store --icmp-type
1968                     die "unknown icmp-type '$rule->{dport}'\n"
1969                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1970                     push @match, "-m icmp --icmp-type $rule->{dport}";
1971                 } elsif ($proto eq 'icmpv6') {
1972                     # Note: we use dport to store --icmpv6-type
1973                     die "unknown icmpv6-type '$rule->{dport}'\n"
1974                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1975                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1976                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1977                     die "protocol $proto does not have ports\n";
1978                 } elsif ($multidport) {
1979                     push @match, "--match multiport", "--dports $rule->{dport}";
1980                 } else {
1981                     push @match, "--dport $rule->{dport}";
1982                 }
1983             };
1984
1985             my $add_sport = sub {
1986                 return if !$rule->{sport};
1987
1988                 die "protocol $proto does not have ports\n"
1989                     if !$PROTOCOLS_WITH_PORTS->{$proto};
1990                 if ($multisport) {
1991                     push @match, "--match multiport", "--sports $rule->{sport}";
1992                 } else {
1993                     push @match, "--sport $rule->{sport}";
1994                 }
1995             };
1996
1997             # order matters - single port before multiport!
1998             $add_dport->() if $multisport;
1999             $add_sport->();
2000             $add_dport->() if !$multisport;
2001         } elsif ($rule->{dport} || $rule->{sport}) {
2002             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2003             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2004         }
2005
2006         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2007     }
2008     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2009
2010     my $targetstr;
2011     if (defined $rule->{target}) {
2012         $targetstr = $rule->{target};
2013     } else {
2014         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2015         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2016         $targetstr = ($goto) ? "-g $action" : "-j $action";
2017     }
2018
2019     my @iptcmds;
2020     my $log = $rule->{log};
2021     if (defined($log) && $log ne 'nolog') {
2022         my $loglevel = $log_level_hash->{$log};
2023         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2024         push @iptcmds, "-A $chain $matchstr $logaction";
2025     }
2026     push @iptcmds, "-A $chain $matchstr $targetstr";
2027     return @iptcmds;
2028 }
2029
2030 sub ruleset_generate_rule {
2031     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2032
2033     my $rules;
2034
2035     if ($rule->{macro}) {
2036         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2037     } else {
2038         $rules = [ $rule ];
2039     }
2040
2041     # update all or nothing
2042     my @ipt_rule_cmds;
2043     foreach my $r (@$rules) {
2044         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2045     }
2046     foreach my $c (@ipt_rule_cmds) {
2047         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2048     }
2049 }
2050
2051 sub ruleset_create_chain {
2052     my ($ruleset, $chain) = @_;
2053
2054     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2055     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2056
2057     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2058
2059     $ruleset->{$chain} = [];
2060 }
2061
2062 sub ruleset_chain_exist {
2063     my ($ruleset, $chain) = @_;
2064
2065     return $ruleset->{$chain} ? 1 : undef;
2066 }
2067
2068 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2069 sub ruleset_add_ipt_cmd {
2070    my ($ruleset, $chain, $iptcmd) = @_;
2071
2072    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2073
2074    push @{$ruleset->{$chain}}, $iptcmd;
2075 }
2076
2077 sub ruleset_addrule {
2078     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2079
2080     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2081
2082     if ($log) {
2083         my $loglevel = $log_level_hash->{$log};
2084         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2085         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2086     }
2087     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2088     $match .= ' ' if length($match);
2089     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2090 }
2091
2092 sub ruleset_insertrule {
2093    my ($ruleset, $chain, $match, $action, $log) = @_;
2094
2095    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2096
2097    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2098 }
2099
2100 sub get_log_rule_base {
2101     my ($chain, $vmid, $msg, $loglevel) = @_;
2102
2103     $vmid = 0 if !defined($vmid);
2104     $msg = "" if !defined($msg);
2105
2106     # Note: we use special format for prefix to pass further
2107     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2108
2109     return "-m limit --limit 1/sec -j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2110 }
2111
2112 sub ruleset_add_chain_policy {
2113     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2114
2115     if ($policy eq 'ACCEPT') {
2116
2117         my $rule = { action => 'ACCEPT' };
2118         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2119         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2120
2121     } elsif ($policy eq 'DROP') {
2122
2123         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2124
2125         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2126     } elsif ($policy eq 'REJECT') {
2127         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2128
2129         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2130     } else {
2131         # should not happen
2132         die "internal error: unknown policy '$policy'";
2133     }
2134 }
2135
2136 sub ruleset_chain_add_ndp {
2137     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2138     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2139
2140     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2141     if ($direction ne 'OUT' || $options->{radv}) {
2142         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2143     }
2144     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2145     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2146 }
2147
2148 sub ruleset_chain_add_conn_filters {
2149     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2150
2151     if (!$allow_invalid) {
2152         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2153     }
2154     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2155 }
2156
2157 sub ruleset_chain_add_input_filters {
2158     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2159
2160     if ($cluster_conf->{ipset}->{blacklist}){
2161         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2162             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2163             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2164         }
2165         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2166         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2167     }
2168
2169     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2170         if ($ipversion == 4) {
2171             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2172         }
2173     }
2174
2175     if ($options->{tcpflags}) {
2176         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2177     }
2178 }
2179
2180 sub ruleset_create_vm_chain {
2181     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2182
2183     ruleset_create_chain($ruleset, $chain);
2184     my $accept = generate_nfqueue($options);
2185
2186     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2187         if ($ipversion == 4) {
2188             if ($direction eq 'OUT') {
2189                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2190                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2191                                         proto => 'udp', sport => 68, dport => 67 });
2192             } else {
2193                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2194                                       { action => 'ACCEPT',
2195                                         proto => 'udp', sport => 67, dport => 68 });
2196             }
2197         } elsif ($ipversion == 6) {
2198             if ($direction eq 'OUT') {
2199                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2200                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2201                                         proto => 'udp', sport => 546, dport => 547 });
2202             } else {
2203                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2204                                       { action => 'ACCEPT',
2205                                         proto => 'udp', sport => 547, dport => 546 });
2206             }
2207         }
2208
2209     }
2210
2211     if ($direction eq 'OUT') {
2212         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2213             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2214         }
2215         if ($ipversion == 6 && !$options->{radv}) {
2216             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2217         }
2218         if ($ipfilter_ipset) {
2219             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2220         }
2221         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2222     }
2223
2224     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2225     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2226 }
2227
2228 sub ruleset_add_group_rule {
2229     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2230
2231     my $group = $rule->{action};
2232     my $group_chain = "GROUP-$group-$direction";
2233     if(!ruleset_chain_exist($ruleset, $group_chain)){
2234         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2235     }
2236
2237     if ($direction eq 'OUT' && $rule->{iface_out}) {
2238         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2239     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2240         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2241     } else {
2242         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2243     }
2244
2245     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2246 }
2247
2248 sub ruleset_generate_vm_rules {
2249     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2250
2251     my $lc_direction = lc($direction);
2252
2253     my $in_accept = generate_nfqueue($options);
2254
2255     foreach my $rule (@$rules) {
2256         next if $rule->{iface} && $rule->{iface} ne $netid;
2257         next if !$rule->{enable} || $rule->{errors};
2258         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2259
2260         if ($rule->{type} eq 'group') {
2261             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2262                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2263         } else {
2264             next if $rule->{type} ne $lc_direction;
2265             eval {
2266                 $rule->{logmsg} = "$rule->{action}: ";
2267                 if ($direction eq 'OUT') {
2268                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2269                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2270                 } else {
2271                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2272                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2273                 }
2274             };
2275             warn $@ if $@;
2276         }
2277     }
2278 }
2279
2280 sub generate_nfqueue {
2281     my ($options) = @_;
2282
2283     if ($options->{ips}) {
2284         my $action = "NFQUEUE";
2285         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2286             if (defined($3) && defined($1)) {
2287                 $action .= " --queue-balance $1:$3";
2288             } elsif (defined($1)) {
2289                 $action .= " --queue-num $1";
2290             }
2291         }
2292         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2293         return $action;
2294     } else {
2295         return "ACCEPT";
2296     }
2297 }
2298
2299 sub ruleset_generate_vm_ipsrules {
2300     my ($ruleset, $options, $direction, $iface) = @_;
2301
2302     if ($options->{ips} && $direction eq 'IN') {
2303         my $nfqueue = generate_nfqueue($options);
2304
2305         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2306             ruleset_create_chain($ruleset, "PVEFW-IPS");
2307         }
2308
2309         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2310     }
2311 }
2312
2313 sub generate_tap_rules_direction {
2314     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2315
2316     my $lc_direction = lc($direction);
2317
2318     my $rules = $vmfw_conf->{rules};
2319
2320     my $options = $vmfw_conf->{options};
2321     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2322
2323     my $tapchain = "$iface-$direction";
2324
2325     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2326     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2327         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2328
2329     # create chain with mac and ip filter
2330     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2331
2332     if ($options->{enable}) {
2333         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2334
2335         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2336
2337         # implement policy
2338         my $policy;
2339
2340         if ($direction eq 'OUT') {
2341             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2342         } else {
2343             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2344         }
2345
2346         my $accept = generate_nfqueue($options);
2347         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2348         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2349     } else {
2350         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2351         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2352     }
2353
2354     # plug the tap chain to bridge chain
2355     if ($direction eq 'IN') {
2356         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2357                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
2358     } else {
2359         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2360                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
2361     }
2362 }
2363
2364 sub enable_host_firewall {
2365     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2366
2367     my $options = $hostfw_conf->{options};
2368     my $cluster_options = $cluster_conf->{options};
2369     my $rules = $hostfw_conf->{rules};
2370     my $cluster_rules = $cluster_conf->{rules};
2371
2372     # host inbound firewall
2373     my $chain = "PVEFW-HOST-IN";
2374     ruleset_create_chain($ruleset, $chain);
2375
2376     my $loglevel = get_option_log_level($options, "log_level_in");
2377
2378     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2379
2380     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2381     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2382     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2383
2384     # we use RETURN because we need to check also tap rules
2385     my $accept_action = 'RETURN';
2386
2387     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2388
2389     # add host rules first, so that cluster wide rules can be overwritten
2390     foreach my $rule (@$rules, @$cluster_rules) {
2391         next if !$rule->{enable} || $rule->{errors};
2392         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2393
2394         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2395
2396         eval {
2397             if ($rule->{type} eq 'group') {
2398                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2399             } elsif ($rule->{type} eq 'in') {
2400                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2401                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2402             }
2403         };
2404         warn $@ if $@;
2405         delete $rule->{iface_in};
2406     }
2407
2408     # allow standard traffic for management ipset (includes cluster network)
2409     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2410     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2411     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2412     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2413     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2414     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2415
2416     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2417     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2418
2419     # corosync
2420     if ($localnet && ($ipversion == $localnet_ver)) {
2421         my $corosync_rule = "-p udp --dport 5404:5405";
2422         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2423         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2424     }
2425
2426     # implement input policy
2427     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2428     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2429
2430     # host outbound firewall
2431     $chain = "PVEFW-HOST-OUT";
2432     ruleset_create_chain($ruleset, $chain);
2433
2434     $loglevel = get_option_log_level($options, "log_level_out");
2435
2436     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2437
2438     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2439
2440     # we use RETURN because we may want to check other thigs later
2441     $accept_action = 'RETURN';
2442     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2443
2444     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2445
2446     # add host rules first, so that cluster wide rules can be overwritten
2447     foreach my $rule (@$rules, @$cluster_rules) {
2448         next if !$rule->{enable} || $rule->{errors};
2449         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2450
2451         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2452         eval {
2453             $rule->{logmsg} = "$rule->{action}: ";
2454             if ($rule->{type} eq 'group') {
2455                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2456             } elsif ($rule->{type} eq 'out') {
2457                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2458                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2459             }
2460         };
2461         warn $@ if $@;
2462         delete $rule->{iface_out};
2463     }
2464
2465     # allow standard traffic on cluster network
2466     if ($localnet && ($ipversion == $localnet_ver)) {
2467         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2468         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2469         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2470         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2471
2472         my $corosync_rule = "-p udp --dport 5404:5405";
2473         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2474         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2475     }
2476
2477     # implement output policy
2478     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2479     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2480
2481     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2482     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2483 }
2484
2485 sub generate_group_rules {
2486     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2487
2488     my $rules = $cluster_conf->{groups}->{$group};
2489
2490     if (!$rules) {
2491         warn "no such security group '$group'\n";
2492         $rules = []; # create empty chain
2493     }
2494
2495     my $chain = "GROUP-${group}-IN";
2496
2497     ruleset_create_chain($ruleset, $chain);
2498     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2499
2500     foreach my $rule (@$rules) {
2501         next if $rule->{type} ne 'in';
2502         next if !$rule->{enable} || $rule->{errors};
2503         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2504         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2505         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2506     }
2507
2508     $chain = "GROUP-${group}-OUT";
2509
2510     ruleset_create_chain($ruleset, $chain);
2511     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2512
2513     foreach my $rule (@$rules) {
2514         next if $rule->{type} ne 'out';
2515         next if !$rule->{enable} || $rule->{errors};
2516         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2517         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2518         # check also other tap rules later
2519         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2520         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2521     }
2522 }
2523
2524 my $MAX_NETS = 32;
2525 my $valid_netdev_names = {};
2526 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2527     $valid_netdev_names->{"net$i"} = 1;
2528 }
2529
2530 sub get_mark_values {
2531     my ($value, $mask) = @_;
2532     $value = hex($value) if $value =~ /^0x/;
2533     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2534     $mask = 0xffffffff if !defined($mask);
2535     return ($value, $mask);
2536 }
2537
2538 sub parse_fw_rule {
2539     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2540
2541     my $orig_line = $line;
2542
2543     my $rule = {};
2544
2545     # we can add single line comments to the end of the rule
2546     if ($line =~ s/#\s*(.*?)\s*$//) {
2547         $rule->{comment} = decode('utf8', $1);
2548     }
2549
2550     # we can disable a rule when prefixed with '|'
2551
2552     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2553
2554     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2555         die "unable to parse rule: $line\n";
2556
2557     $rule->{type} = lc($1);
2558     $rule->{action} = $2;
2559
2560     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2561         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2562             $rule->{macro} = $1;
2563             $rule->{action} = $2;
2564         }
2565     }
2566
2567     while (length($line)) {
2568         if ($line =~ s/^-i (\S+)\s*//) {
2569             $rule->{iface} = $1;
2570             next;
2571         }
2572
2573         last if $rule->{type} eq 'group';
2574
2575         if ($line =~ s/^-p (\S+)\s*//) {
2576             $rule->{proto} = $1;
2577             next;
2578         }
2579
2580         if ($line =~ s/^-dport (\S+)\s*//) {
2581             $rule->{dport} = $1;
2582             next;
2583         }
2584
2585         if ($line =~ s/^-sport (\S+)\s*//) {
2586             $rule->{sport} = $1;
2587             next;
2588         }
2589         if ($line =~ s/^-source (\S+)\s*//) {
2590             $rule->{source} = $1;
2591             next;
2592         }
2593         if ($line =~ s/^-dest (\S+)\s*//) {
2594             $rule->{dest} = $1;
2595             next;
2596         }
2597         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2598             $rule->{log} = $1;
2599             next;
2600         }
2601
2602         last;
2603     }
2604
2605     die "unable to parse rule parameters: $line\n" if length($line);
2606
2607     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2608     if ($rule->{errors}) {
2609         # The verbose flag really means we're running from the CLI and want
2610         # output on the console - in the other case we really want such errors
2611         # to go into the syslog instead.
2612         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2613         $log->("$prefix - errors in rule parameters: $orig_line\n");
2614         foreach my $p (keys %{$rule->{errors}}) {
2615             $log->("  $p: $rule->{errors}->{$p}\n");
2616         }
2617     }
2618
2619     return $rule;
2620 }
2621
2622 sub verify_ethertype {
2623     my ($value) = @_;
2624     my $types = get_etc_ethertypes();
2625     die "unknown ethernet protocol type: $value\n"
2626         if !defined($types->{byname}->{$value}) &&
2627            !defined($types->{byid}->{$value});
2628 }
2629
2630 sub parse_vmfw_option {
2631     my ($line) = @_;
2632
2633     my ($opt, $value);
2634
2635     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2636
2637     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2638         $opt = lc($1);
2639         $value = int($2);
2640     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2641         $opt = lc($1);
2642         $value = $2 ? lc($3) : '';
2643     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2644         $opt = lc($1);
2645         $value = uc($3);
2646     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2647         $opt = lc($1);
2648         $value = $2;
2649     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2650         $opt = lc($1);
2651         $value = $2;
2652         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2653     } else {
2654         die "can't parse option '$line'\n"
2655     }
2656
2657     return ($opt, $value);
2658 }
2659
2660 sub parse_hostfw_option {
2661     my ($line) = @_;
2662
2663     my ($opt, $value);
2664
2665     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2666
2667     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2668         $opt = lc($1);
2669         $value = int($2);
2670     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2671         $opt = lc($1);
2672         $value = $2 ? lc($3) : '';
2673     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2674         $opt = lc($1);
2675         $value = int($2);
2676     } else {
2677         die "can't parse option '$line'\n"
2678     }
2679
2680     return ($opt, $value);
2681 }
2682
2683 sub parse_clusterfw_option {
2684     my ($line) = @_;
2685
2686     my ($opt, $value);
2687
2688     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2689         $opt = lc($1);
2690         $value = int($2);
2691         if (($value > 1) && ((time() - $value) > 60)) {
2692             $value = 0
2693         }
2694     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2695         $opt = lc($1);
2696         $value = int($2);
2697     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2698         $opt = lc($1);
2699         $value = uc($3);
2700     } else {
2701         die "can't parse option '$line'\n"
2702     }
2703
2704     return ($opt, $value);
2705 }
2706
2707 sub resolve_alias {
2708     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2709
2710     my $alias = lc($cidr);
2711     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2712     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2713
2714     die "no such alias '$cidr'\n" if !$e;;
2715
2716     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2717 }
2718
2719 sub parse_ip_or_cidr {
2720     my ($cidr) = @_;
2721
2722     my $ipversion;
2723
2724     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2725         $cidr =~ s|/128$||;
2726         $ipversion = 6;
2727     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2728         $cidr =~ s|/32$||;
2729         $ipversion = 4;
2730     } else {
2731         die "value does not look like a valid IP address or CIDR network\n";
2732     }
2733
2734     return wantarray ? ($cidr, $ipversion) : $cidr;
2735 }
2736
2737 sub parse_alias {
2738     my ($line) = @_;
2739
2740     # we can add single line comments to the end of the line
2741     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2742
2743     if ($line =~ m/^(\S+)\s(\S+)$/) {
2744         my ($name, $cidr) = ($1, $2);
2745         my $ipversion;
2746
2747         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2748
2749         my $data = {
2750             name => $name,
2751             cidr => $cidr,
2752             ipversion => $ipversion,
2753         };
2754         $data->{comment} = $comment  if $comment;
2755         return $data;
2756     }
2757
2758     return undef;
2759 }
2760
2761 sub generic_fw_config_parser {
2762     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2763
2764     my $section;
2765     my $group;
2766
2767     my $res = $empty_conf;
2768
2769     while (defined(my $line = <$fh>)) {
2770         next if $line =~ m/^#/;
2771         next if $line =~ m/^\s*$/;
2772
2773         chomp $line;
2774
2775         my $linenr = $fh->input_line_number();
2776         my $prefix = "$filename (line $linenr)";
2777
2778         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2779             $section = 'options';
2780             next;
2781         }
2782
2783         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2784             $section = 'aliases';
2785             next;
2786         }
2787
2788         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2789             $section = 'groups';
2790             $group = lc($1);
2791             my $comment = $2;
2792             eval {
2793                 die "security group name too long\n" if length($group) > $max_group_name_length;
2794                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2795             };
2796             if (my $err = $@) {
2797                 ($section, $group, $comment) = undef;
2798                 warn "$prefix: $err";
2799                 next;
2800             }
2801
2802             $res->{$section}->{$group} = [];
2803             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2804                 if $comment;
2805             next;
2806         }
2807
2808         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2809             $section = 'rules';
2810             next;
2811         }
2812
2813         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2814             $section = 'ipset';
2815             $group = lc($1);
2816             my $comment = $2;
2817             eval {
2818                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2819                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2820             };
2821             if (my $err = $@) {
2822                 ($section, $group, $comment) = undef;
2823                 warn "$prefix: $err";
2824                 next;
2825             }
2826
2827             $res->{$section}->{$group} = [];
2828             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2829                 if $comment;
2830             next;
2831         }
2832
2833         if (!$section) {
2834             warn "$prefix: skip line - no section\n";
2835             next;
2836         }
2837
2838         if ($section eq 'options') {
2839             eval {
2840                 my ($opt, $value);
2841                 if ($rule_env eq 'cluster') {
2842                     ($opt, $value) = parse_clusterfw_option($line);
2843                 } elsif ($rule_env eq 'host') {
2844                     ($opt, $value) = parse_hostfw_option($line);
2845                 } else {
2846                     ($opt, $value) = parse_vmfw_option($line);
2847                 }
2848                 $res->{options}->{$opt} = $value;
2849             };
2850             warn "$prefix: $@" if $@;
2851         } elsif ($section eq 'aliases') {
2852             eval {
2853                 my $data = parse_alias($line);
2854                 $res->{aliases}->{lc($data->{name})} = $data;
2855             };
2856             warn "$prefix: $@" if $@;
2857         } elsif ($section eq 'rules') {
2858             my $rule;
2859             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2860             if (my $err = $@) {
2861                 warn "$prefix: $err";
2862                 next;
2863             }
2864             push @{$res->{$section}}, $rule;
2865         } elsif ($section eq 'groups') {
2866             my $rule;
2867             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2868             if (my $err = $@) {
2869                 warn "$prefix: $err";
2870                 next;
2871             }
2872             push @{$res->{$section}->{$group}}, $rule;
2873         } elsif ($section eq 'ipset') {
2874             # we can add single line comments to the end of the rule
2875             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2876
2877             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2878             my $nomatch = $1;
2879             my $cidr = $2;
2880             my $errors;
2881
2882             if ($nomatch && !$feature_ipset_nomatch) {
2883                 $errors->{nomatch} = "nomatch not supported by kernel";
2884             }
2885
2886             eval {
2887                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2888                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2889                 } else {
2890                     $cidr = parse_ip_or_cidr($cidr);
2891                 }
2892             };
2893             if (my $err = $@) {
2894                 chomp $err;
2895                 $errors->{cidr} = $err;
2896             }
2897
2898             if ($cidr =~ m!/0+$!) {
2899                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2900             }
2901
2902             my $entry = { cidr => $cidr };
2903             $entry->{nomatch} = 1 if $nomatch;
2904             $entry->{comment} = $comment if $comment;
2905             $entry->{errors} =  $errors if $errors;
2906
2907             if ($verbose && $errors) {
2908                 warn "$prefix - errors in ipset '$group': $line\n";
2909                 foreach my $p (keys %{$errors}) {
2910                     warn "  $p: $errors->{$p}\n";
2911                 }
2912             }
2913
2914             push @{$res->{$section}->{$group}}, $entry;
2915         } else {
2916             warn "$prefix: skip line - unknown section\n";
2917             next;
2918         }
2919     }
2920
2921     return $res;
2922 }
2923
2924 sub parse_hostfw_config {
2925     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2926
2927     my $empty_conf = { rules => [], options => {}};
2928
2929     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2930 }
2931
2932 sub parse_vmfw_config {
2933     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2934
2935     my $empty_conf = {
2936         rules => [],
2937         options => {},
2938         aliases => {},
2939         ipset => {} ,
2940         ipset_comments => {},
2941     };
2942
2943     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2944 }
2945
2946 sub parse_clusterfw_config {
2947     my ($filename, $fh, $verbose) = @_;
2948
2949     my $section;
2950     my $group;
2951
2952     my $empty_conf = {
2953         rules => [],
2954         options => {},
2955         aliases => {},
2956         groups => {},
2957         group_comments => {},
2958         ipset => {} ,
2959         ipset_comments => {},
2960     };
2961
2962     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2963 }
2964
2965 sub run_locked {
2966     my ($code, @param) = @_;
2967
2968     my $timeout = 10;
2969
2970     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2971
2972     die $@ if $@;
2973
2974     return $res;
2975 }
2976
2977 sub read_local_vm_config {
2978
2979     my $qemu = {};
2980     my $lxc = {};
2981
2982     my $vmdata = { qemu => $qemu, lxc => $lxc };
2983
2984     my $vmlist = PVE::Cluster::get_vmlist();
2985     return $vmdata if !$vmlist || !$vmlist->{ids};
2986     my $ids = $vmlist->{ids};
2987
2988     foreach my $vmid (keys %$ids) {
2989         next if !$vmid; # skip VE0
2990         my $d = $ids->{$vmid};
2991         next if !$d->{node} || $d->{node} ne $nodename;
2992         next if !$d->{type};
2993         if ($d->{type} eq 'qemu') {
2994             if ($have_qemu_server) {
2995                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2996                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2997                     $qemu->{$vmid} = $conf;
2998                 }
2999             }
3000         } elsif ($d->{type} eq 'lxc') {
3001             if ($have_lxc) {
3002                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3003                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3004                     $lxc->{$vmid} = $conf;
3005                 }
3006             }
3007         }
3008     }
3009
3010     return $vmdata;
3011 };
3012
3013 sub load_vmfw_conf {
3014     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
3015
3016     my $vmfw_conf = {};
3017
3018     $dir = $pvefw_conf_dir if !defined($dir);
3019
3020     my $filename = "$dir/$vmid.fw";
3021     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3022         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
3023         $vmfw_conf->{vmid} = $vmid;
3024     }
3025
3026     return $vmfw_conf;
3027 }
3028
3029 my $format_rules = sub {
3030     my ($rules, $allow_iface) = @_;
3031
3032     my $raw = '';
3033
3034     foreach my $rule (@$rules) {
3035         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3036             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3037             $raw .= uc($rule->{type});
3038             if ($rule->{macro}) {
3039                 $raw .= " $rule->{macro}($rule->{action})";
3040             } else {
3041                 $raw .= " " . $rule->{action};
3042             }
3043             if ($allow_iface && $rule->{iface}) {
3044                 $raw .= " -i $rule->{iface}";
3045             }
3046
3047             if ($rule->{type} ne  'group')  {
3048                 $raw .= " -source $rule->{source}" if $rule->{source};
3049                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3050                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3051                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3052                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3053                 $raw .= " -log $rule->{log}" if $rule->{log};
3054             }
3055
3056             $raw .= " # " . encode('utf8', $rule->{comment})
3057                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3058             $raw .= "\n";
3059         } else {
3060             die "unknown rule type '$rule->{type}'";
3061         }
3062     }
3063
3064     return $raw;
3065 };
3066
3067 my $format_options = sub {
3068     my ($options) = @_;
3069
3070     my $raw = '';
3071
3072     $raw .= "[OPTIONS]\n\n";
3073     foreach my $opt (keys %$options) {
3074         $raw .= "$opt: $options->{$opt}\n";
3075     }
3076     $raw .= "\n";
3077
3078     return $raw;
3079 };
3080
3081 my $format_aliases = sub {
3082     my ($aliases) = @_;
3083
3084     my $raw = '';
3085
3086     $raw .= "[ALIASES]\n\n";
3087     foreach my $k (keys %$aliases) {
3088         my $e = $aliases->{$k};
3089         $raw .= "$e->{name} $e->{cidr}";
3090         $raw .= " # " . encode('utf8', $e->{comment})
3091             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3092         $raw .= "\n";
3093     }
3094     $raw .= "\n";
3095
3096     return $raw;
3097 };
3098
3099 my $format_ipsets = sub {
3100     my ($fw_conf) = @_;
3101
3102     my $raw = '';
3103
3104     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3105         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3106             my $utf8comment = encode('utf8', $comment);
3107             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3108         } else {
3109             $raw .= "[IPSET $ipset]\n\n";
3110         }
3111         my $options = $fw_conf->{ipset}->{$ipset};
3112
3113         my $nethash = {};
3114         foreach my $entry (@$options) {
3115             $nethash->{$entry->{cidr}} = $entry;
3116         }
3117
3118         foreach my $cidr (sort keys %$nethash) {
3119             my $entry = $nethash->{$cidr};
3120             my $line = $entry->{nomatch} ? '!' : '';
3121             $line .= $entry->{cidr};
3122             $line .= " # " . encode('utf8', $entry->{comment})
3123                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3124             $raw .= "$line\n";
3125         }
3126
3127         $raw .= "\n";
3128     }
3129
3130     return $raw;
3131 };
3132
3133 sub save_vmfw_conf {
3134     my ($vmid, $vmfw_conf) = @_;
3135
3136     my $raw = '';
3137
3138     my $options = $vmfw_conf->{options};
3139     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3140
3141     my $aliases = $vmfw_conf->{aliases};
3142     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3143
3144     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3145
3146     my $rules = $vmfw_conf->{rules} || [];
3147     if ($rules && scalar(@$rules)) {
3148         $raw .= "[RULES]\n\n";
3149         $raw .= &$format_rules($rules, 1);
3150         $raw .= "\n";
3151     }
3152
3153     my $filename = "$pvefw_conf_dir/$vmid.fw";
3154     if ($raw) {
3155         mkdir $pvefw_conf_dir;
3156         PVE::Tools::file_set_contents($filename, $raw);
3157     } else {
3158         unlink $filename;
3159     }
3160 }
3161
3162 sub remove_vmfw_conf {
3163     my ($vmid) = @_;
3164
3165     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3166
3167     unlink $vmfw_conffile;
3168 }
3169
3170 sub clone_vmfw_conf {
3171     my ($vmid, $newid) = @_;
3172
3173     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3174     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3175
3176     if (-f $clonevm_conffile) {
3177         unlink $clonevm_conffile;
3178     }
3179     if (-f $sourcevm_conffile) {
3180         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3181         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3182     }
3183 }
3184
3185 sub read_vm_firewall_configs {
3186     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3187
3188     my $vmfw_configs = {};
3189
3190     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3191         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3192         next if !$vmfw_conf->{options}; # skip if file does not exists
3193         $vmfw_configs->{$vmid} = $vmfw_conf;
3194     }
3195     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3196         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3197         next if !$vmfw_conf->{options}; # skip if file does not exists
3198         $vmfw_configs->{$vmid} = $vmfw_conf;
3199     }
3200
3201     return $vmfw_configs;
3202 }
3203
3204 sub get_option_log_level {
3205     my ($options, $k) = @_;
3206
3207     my $v = $options->{$k};
3208     $v = $default_log_level if !defined($v);
3209
3210     return undef if $v eq '' || $v eq 'nolog';
3211
3212     return $v if defined($log_level_hash->{$v});
3213
3214     warn "unknown log level ($k = '$v')\n";
3215
3216     return undef;
3217 }
3218
3219 sub generate_std_chains {
3220     my ($ruleset, $options, $ipversion) = @_;
3221
3222     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3223
3224     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3225     my $chain = 'PVEFW-smurflog';
3226     if ( $std_chains->{$chain} ) {
3227         foreach my $r (@{$std_chains->{$chain}}) {
3228           $r->{log} = $loglevel;
3229         }
3230     }
3231
3232     # same as shorewall logflags action.
3233     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3234     $chain = 'PVEFW-logflags';
3235     if ( $std_chains->{$chain} ) {
3236         foreach my $r (@{$std_chains->{$chain}}) {
3237           $r->{log} = $loglevel;
3238         }
3239     }
3240
3241     foreach my $chain (keys %$std_chains) {
3242         ruleset_create_chain($ruleset, $chain);
3243         foreach my $rule (@{$std_chains->{$chain}}) {
3244             if (ref($rule)) {
3245                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3246             } else {
3247                 die "rule $rule as string - should not happen";
3248             }
3249         }
3250     }
3251 }
3252
3253 sub generate_ipset_chains {
3254     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3255
3256     foreach my $ipset (keys %{$ipsets}) {
3257
3258         my $options = $ipsets->{$ipset};
3259
3260         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3261             if (my $ips = $device_ips->{$1}) {
3262                 $options = [@$options, @$ips];
3263             }
3264         }
3265
3266         # remove duplicates
3267         my $nethash = {};
3268         foreach my $entry (@$options) {
3269             next if $entry->{errors}; # skip entries with errors
3270             eval {
3271                 my ($cidr, $ver);
3272                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3273                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3274                 } else {
3275                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3276                 }
3277                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3278                 if ($ver == 6) {
3279                     # ip_compress_address takes an address only, no CIDR
3280                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3281                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3282                     $cidr .= $prefix_len if defined($prefix_len);
3283                     $cidr =~ s|/128$||;
3284                 } else {
3285                     $cidr =~ s|/32$||;
3286                 }
3287
3288                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3289             };
3290             warn $@ if $@;
3291         }
3292
3293         foreach my $ipversion (4, 6) {
3294             my $data = $nethash->{$ipversion};
3295
3296             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3297
3298             my $hashsize = scalar(@$options);
3299             if ($hashsize <= 64) {
3300                 $hashsize = 64;
3301             } else {
3302                 $hashsize = round_powerof2($hashsize);
3303             }
3304
3305             my $family = $ipversion == "6" ? "inet6" : "inet";
3306
3307             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3308
3309             foreach my $cidr (sort keys %$data) {
3310                 my $entry = $data->{$cidr};
3311
3312                 my $cmd = "add $name $cidr";
3313                 if ($entry->{nomatch}) {
3314                     if ($feature_ipset_nomatch) {
3315                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3316                     } else {
3317                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3318                     }
3319                 } else {
3320                     push @{$ipset_ruleset->{$name}}, $cmd;
3321                 }
3322             }
3323         }
3324     }
3325 }
3326
3327 sub round_powerof2 {
3328     my ($int) = @_;
3329
3330     $int--;
3331     $int |= $int >> $_ foreach (1,2,4,8,16);
3332     return ++$int;
3333 }
3334
3335 sub load_clusterfw_conf {
3336     my ($filename, $verbose) = @_;
3337
3338     $filename = $clusterfw_conf_filename if !defined($filename);
3339
3340     my $cluster_conf = {};
3341     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3342         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3343     }
3344
3345     return $cluster_conf;
3346 }
3347
3348 sub save_clusterfw_conf {
3349     my ($cluster_conf) = @_;
3350
3351     my $raw = '';
3352
3353     my $options = $cluster_conf->{options};
3354     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3355
3356     my $aliases = $cluster_conf->{aliases};
3357     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3358
3359     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3360
3361     my $rules = $cluster_conf->{rules};
3362     if ($rules && scalar(@$rules)) {
3363         $raw .= "[RULES]\n\n";
3364         $raw .= &$format_rules($rules, 1);
3365         $raw .= "\n";
3366     }
3367
3368     if ($cluster_conf->{groups}) {
3369         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3370             my $rules = $cluster_conf->{groups}->{$group};
3371             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3372                 my $utf8comment = encode('utf8', $comment);
3373                 $raw .= "[group $group] # $utf8comment\n\n";
3374             } else {
3375                 $raw .= "[group $group]\n\n";
3376             }
3377
3378             $raw .= &$format_rules($rules, 0);
3379             $raw .= "\n";
3380         }
3381     }
3382
3383     if ($raw) {
3384         mkdir $pvefw_conf_dir;
3385         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3386     } else {
3387         unlink $clusterfw_conf_filename;
3388     }
3389 }
3390
3391 sub load_hostfw_conf {
3392     my ($cluster_conf, $filename, $verbose) = @_;
3393
3394     $filename = $hostfw_conf_filename if !defined($filename);
3395
3396     my $hostfw_conf = {};
3397     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3398         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3399     }
3400     return $hostfw_conf;
3401 }
3402
3403 sub save_hostfw_conf {
3404     my ($hostfw_conf) = @_;
3405
3406     my $raw = '';
3407
3408     my $options = $hostfw_conf->{options};
3409     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3410
3411     my $rules = $hostfw_conf->{rules};
3412     if ($rules && scalar(@$rules)) {
3413         $raw .= "[RULES]\n\n";
3414         $raw .= &$format_rules($rules, 1);
3415         $raw .= "\n";
3416     }
3417
3418     if ($raw) {
3419         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3420     } else {
3421         unlink $hostfw_conf_filename;
3422     }
3423 }
3424
3425 sub compile {
3426     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3427
3428     my $vmfw_configs;
3429
3430     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3431     $pve_std_chains = dclone($pve_std_chains_conf);
3432
3433     if ($vmdata) { # test mode
3434         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3435         my $filename = "$testdir/cluster.fw";
3436         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3437
3438         $filename = "$testdir/host.fw";
3439         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3440
3441         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3442     } else { # normal operation
3443         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3444
3445         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3446
3447         $vmdata = read_local_vm_config();
3448         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3449     }
3450
3451     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3452
3453     my $localnet;
3454     if ($cluster_conf->{aliases}->{local_network}) {
3455         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3456     } else {
3457         my $localnet_ver;
3458         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3459
3460         $cluster_conf->{aliases}->{local_network} = {
3461             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3462     }
3463
3464     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3465
3466     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3467     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3468     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3469     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3470
3471     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3472 }
3473
3474 sub compile_iptables_filter {
3475     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3476
3477     my $ruleset = {};
3478
3479     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3480     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3481
3482     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3483
3484     my $hostfw_options = $hostfw_conf->{options} || {};
3485
3486     # fixme: what log level should we use here?
3487     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3488
3489     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3490     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3491
3492     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3493     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3494
3495     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3496
3497     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3498     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3499
3500     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3501
3502     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3503
3504     if ($hostfw_enable) {
3505         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3506         warn $@ if $@; # just to be sure - should not happen
3507     }
3508
3509     # generate firewall rules for QEMU VMs
3510     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3511         eval {
3512             my $conf = $vmdata->{qemu}->{$vmid};
3513             my $vmfw_conf = $vmfw_configs->{$vmid};
3514             return if !$vmfw_conf;
3515
3516             foreach my $netid (sort keys %$conf) {
3517                 next if $netid !~ m/^net(\d+)$/;
3518                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3519                 next if !$net->{firewall};
3520                 my $iface = "tap${vmid}i$1";
3521
3522                 my $macaddr = $net->{macaddr};
3523                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3524                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3525                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3526                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3527             }
3528         };
3529         warn $@ if $@; # just to be sure - should not happen
3530     }
3531
3532     # generate firewall rules for LXC containers
3533     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3534         eval {
3535             my $conf = $vmdata->{lxc}->{$vmid};
3536             my $vmfw_conf = $vmfw_configs->{$vmid};
3537             return if !$vmfw_conf;
3538
3539             if ($vmfw_conf->{options}->{enable}) {
3540                 foreach my $netid (sort keys %$conf) {
3541                     next if $netid !~ m/^net(\d+)$/;
3542                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3543                     next if !$net->{firewall};
3544                     my $iface = "veth${vmid}i$1";
3545                     my $macaddr = $net->{hwaddr};
3546                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3547                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3548                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3549                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3550                 }
3551             }
3552         };
3553         warn $@ if $@; # just to be sure - should not happen
3554     }
3555
3556     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3557         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3558     }
3559
3560     return $ruleset;
3561 }
3562
3563 sub mac_to_linklocal {
3564     my ($macaddr) = @_;
3565     my @parts = split(/:/, $macaddr);
3566     # The standard link local address uses the fe80::/64 prefix with the
3567     # modified EUI-64 identifier derived from the MAC address by flipping the
3568     # universal/local bit and inserting FF:FE in the middle.
3569     # See RFC 4291.
3570     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3571     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3572     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3573 }
3574
3575 sub compile_ipsets {
3576     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3577
3578     my $localnet;
3579     if ($cluster_conf->{aliases}->{local_network}) {
3580         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3581     } else {
3582         my $localnet_ver;
3583         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3584
3585         $cluster_conf->{aliases}->{local_network} = {
3586             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3587     }
3588
3589     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3590
3591
3592     my $ipset_ruleset = {};
3593
3594     # generate ipsets for QEMU VMs
3595     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3596         eval {
3597             my $conf = $vmdata->{qemu}->{$vmid};
3598             my $vmfw_conf = $vmfw_configs->{$vmid};
3599             return if !$vmfw_conf;
3600
3601             # When the 'ipfilter' option is enabled every device for which there
3602             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3603             # ipset.
3604             # The reason is that ipfilter ipsets are always filled with standard
3605             # IPv6 link-local filters.
3606             my $ipsets = $vmfw_conf->{ipset};
3607             my $implicit_sets = {};
3608
3609             my $device_ips = {};
3610             foreach my $netid (keys %$conf) {
3611                 next if $netid !~ m/^net(\d+)$/;
3612                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3613                 next if !$net->{firewall};
3614
3615                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3616                     $implicit_sets->{"ipfilter-$netid"} = [];
3617                 }
3618
3619                 my $macaddr = $net->{macaddr};
3620                 my $linklocal = mac_to_linklocal($macaddr);
3621                 $device_ips->{$netid} = [
3622                     { cidr => $linklocal },
3623                     { cidr => 'fe80::/10', nomatch => 1 }
3624                 ];
3625             }
3626
3627             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3628             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3629         };
3630         warn $@ if $@; # just to be sure - should not happen
3631     }
3632
3633     # generate firewall rules for LXC containers
3634     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3635         eval {
3636             my $conf = $vmdata->{lxc}->{$vmid};
3637             my $vmfw_conf = $vmfw_configs->{$vmid};
3638             return if !$vmfw_conf;
3639
3640             # When the 'ipfilter' option is enabled every device for which there
3641             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3642             # ipset.
3643             # The reason is that ipfilter ipsets are always filled with standard
3644             # IPv6 link-local filters, as well as the IP addresses configured
3645             # for the container.
3646             my $ipsets = $vmfw_conf->{ipset};
3647             my $implicit_sets = {};
3648
3649             my $device_ips = {};
3650             foreach my $netid (keys %$conf) {
3651                 next if $netid !~ m/^net(\d+)$/;
3652                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3653                 next if !$net->{firewall};
3654
3655                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3656                     $implicit_sets->{"ipfilter-$netid"} = [];
3657                 }
3658
3659                 my $macaddr = $net->{hwaddr};
3660                 my $linklocal = mac_to_linklocal($macaddr);
3661                 my $set = $device_ips->{$netid} = [
3662                     { cidr => $linklocal },
3663                     { cidr => 'fe80::/10', nomatch => 1 }
3664                 ];
3665                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3666                     push @$set, { cidr => $1 };
3667                 }
3668                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3669                     push @$set, { cidr => $1 };
3670                 }
3671             }
3672
3673             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3674             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3675         };
3676         warn $@ if $@; # just to be sure - should not happen
3677     }
3678
3679     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3680
3681     return $ipset_ruleset;
3682 }
3683
3684 sub compile_ebtables_filter {
3685     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3686
3687     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3688         return {};
3689     }
3690
3691     my $ruleset = {};
3692
3693     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3694
3695     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3696     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3697     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3698     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3699     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3700
3701     # generate firewall rules for QEMU VMs
3702     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3703         eval {
3704             my $conf = $vmdata->{qemu}->{$vmid};
3705             my $vmfw_conf = $vmfw_configs->{$vmid};
3706             return if !$vmfw_conf;
3707             my $ipsets = $vmfw_conf->{ipset};
3708
3709             foreach my $netid (sort keys %$conf) {
3710                 next if $netid !~ m/^net(\d+)$/;
3711                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3712                 next if !$net->{firewall};
3713                 my $iface = "tap${vmid}i$1";
3714                 my $macaddr = $net->{macaddr};
3715                 my $arpfilter = [];
3716                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3717                     foreach my $ipaddr (@$ipset) {
3718                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3719                         next if !$ip || ($version && $version != 4);
3720                         push(@$arpfilter, $ip);
3721                     }
3722                 }
3723                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3724             }
3725         };
3726         warn $@ if $@; # just to be sure - should not happen
3727     }
3728
3729     # generate firewall rules for LXC containers
3730     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3731         eval {
3732             my $conf = $vmdata->{lxc}->{$vmid};
3733
3734             my $vmfw_conf = $vmfw_configs->{$vmid};
3735             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3736             my $ipsets = $vmfw_conf->{ipset};
3737
3738             foreach my $netid (sort keys %$conf) {
3739                 next if $netid !~ m/^net(\d+)$/;
3740                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3741                 next if !$net->{firewall};
3742                 my $iface = "veth${vmid}i$1";
3743                 my $macaddr = $net->{hwaddr};
3744                 my $arpfilter = [];
3745                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3746                     foreach my $ipaddr (@$ipset) {
3747                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3748                         next if !$ip || ($version && $version != 4);
3749                         push(@$arpfilter, $ip);
3750                     }
3751                 }
3752                 push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
3753                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3754             }
3755         };
3756         warn $@ if $@; # just to be sure - should not happen
3757     }
3758
3759     return $ruleset;
3760 }
3761
3762 sub generate_tap_layer2filter {
3763     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3764     my $options = $vmfw_conf->{options};
3765
3766     my $tapchain = $iface."-OUT";
3767
3768     # ebtables remove zeros from mac pairs
3769     $macaddr =~ s/0([0-9a-f])/$1/ig;
3770     $macaddr = lc($macaddr);
3771
3772     ruleset_create_chain($ruleset, $tapchain);
3773
3774     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3775             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3776     }
3777
3778     if (@$arpfilter){
3779         my $arpchain = $tapchain."-ARP";
3780         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3781         ruleset_create_chain($ruleset, $arpchain);
3782
3783         foreach my $ip (@{$arpfilter}) {
3784             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3785         }
3786         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3787     }
3788
3789     if (defined($options->{layer2_protocols})){
3790         my $protochain = $tapchain."-PROTO";
3791         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3792         ruleset_create_chain($ruleset, $protochain);
3793
3794         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3795             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3796         }
3797         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3798     }
3799
3800     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3801
3802     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3803 }
3804
3805 # the parameter $change_only_regex changes two things if defined:
3806 # * all chains not matching it will be left intact
3807 # * both the $active_chains hash and the returned status_hash have different
3808 #   structure (they contain a key named 'rules').
3809 sub get_ruleset_status {
3810     my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
3811
3812     my $statushash = {};
3813
3814     foreach my $chain (sort keys %$ruleset) {
3815         my $rules = $ruleset->{$chain};
3816         my $sig = &$digest_fn($rules);
3817         my $oldsig;
3818
3819         $statushash->{$chain}->{sig} = $sig;
3820         if (defined($change_only_regex)) {
3821             $oldsig = $active_chains->{$chain}->{sig};
3822             $statushash->{$chain}->{rules} = $rules;
3823         } else {
3824             $oldsig = $active_chains->{$chain};
3825         }
3826         if (!defined($oldsig)) {
3827             $statushash->{$chain}->{action} = 'create';
3828         } else {
3829             if ($oldsig eq $sig) {
3830                 $statushash->{$chain}->{action} = 'exists';
3831             } else {
3832                 $statushash->{$chain}->{action} = 'update';
3833             }
3834         }
3835         if ($verbose) {
3836             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3837             foreach my $cmd (@{$rules}) {
3838                 print "\t$cmd\n";
3839             }
3840         }
3841     }
3842
3843     foreach my $chain (sort keys %$active_chains) {
3844         next if defined($ruleset->{$chain});
3845         my $action = 'delete';
3846         my $sig = $active_chains->{$chain};
3847         if (defined($change_only_regex)) {
3848             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3849             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3850             $sig = $sig->{sig};
3851         }
3852         $statushash->{$chain}->{action} = $action;
3853         $statushash->{$chain}->{sig} = $sig;
3854         print "$action $chain ($sig)\n" if $verbose;
3855     }
3856
3857     return $statushash;
3858 }
3859
3860 sub print_sig_rule {
3861     my ($chain, $sig) = @_;
3862
3863     # We just use this to store a SHA1 checksum used to detect changes
3864     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3865 }
3866
3867 sub get_ruleset_cmdlist {
3868     my ($ruleset, $verbose, $iptablescmd) = @_;
3869
3870     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3871
3872     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3873     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3874
3875     # create missing chains first
3876     foreach my $chain (sort keys %$ruleset) {
3877         my $stat = $statushash->{$chain};
3878         die "internal error" if !$stat;
3879         next if $stat->{action} ne 'create';
3880
3881         $cmdlist .= ":$chain - [0:0]\n";
3882     }
3883
3884     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3885         my $chain = "PVEFW-$h";
3886         if ($ruleset->{$chain} && !$hooks->{$h}) {
3887             $cmdlist .= "-A $h -j $chain\n";
3888         }
3889     }
3890
3891     foreach my $chain (sort keys %$ruleset) {
3892         my $stat = $statushash->{$chain};
3893         die "internal error" if !$stat;
3894
3895         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3896             $cmdlist .= "-F $chain\n";
3897             foreach my $cmd (@{$ruleset->{$chain}}) {
3898                 $cmdlist .= "$cmd\n";
3899             }
3900             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3901         } elsif ($stat->{action} eq 'delete') {
3902             die "internal error"; # this should not happen
3903         } elsif ($stat->{action} eq 'exists') {
3904             # do nothing
3905         } else {
3906             die "internal error - unknown status '$stat->{action}'";
3907         }
3908     }
3909
3910     foreach my $chain (keys %$statushash) {
3911         next if $statushash->{$chain}->{action} ne 'delete';
3912         $cmdlist .= "-F $chain\n";
3913     }
3914     foreach my $chain (keys %$statushash) {
3915         next if $statushash->{$chain}->{action} ne 'delete';
3916         next if $chain eq 'PVEFW-INPUT';
3917         next if $chain eq 'PVEFW-OUTPUT';
3918         next if $chain eq 'PVEFW-FORWARD';
3919         $cmdlist .= "-X $chain\n";
3920     }
3921
3922     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3923
3924     $cmdlist .= "COMMIT\n";
3925
3926     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3927 }
3928
3929 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3930
3931 sub get_ebtables_cmdlist {
3932     my ($ruleset, $verbose) = @_;
3933
3934     my $changes = 0;
3935     my $cmdlist = "*filter\n";
3936
3937     my $active_chains = ebtables_get_chains();
3938     my $statushash = get_ruleset_status($ruleset, $active_chains,
3939                                         \&iptables_chain_digest, $verbose,
3940                                         $pve_ebtables_chainname_regex);
3941
3942     # create chains first and make sure PVE rules are evaluated if active
3943     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3944     my $pve_include = 0;
3945     foreach my $chain (sort keys %$statushash) {
3946         next if ($statushash->{$chain}->{action} eq 'delete');
3947         $cmdlist .= ":$chain ACCEPT\n";
3948         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3949     }
3950
3951     foreach my $chain (sort keys %$statushash) {
3952         my $stat = $statushash->{$chain};
3953         next if ($stat->{action} eq 'delete');
3954         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3955
3956         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3957             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3958                 next if ! $pve_include;
3959                 $pve_include = 0;
3960             }
3961             $cmdlist .= "$cmd\n";
3962         }
3963     }
3964     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
3965
3966     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3967 }
3968
3969 sub get_ipset_cmdlist {
3970     my ($ruleset, $verbose) = @_;
3971
3972     my $cmdlist = "";
3973
3974     my $delete_cmdlist = "";
3975
3976     my $active_chains = ipset_get_chains();
3977     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3978
3979     # remove stale _swap chains
3980     foreach my $chain (keys %$active_chains) {
3981         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3982             $cmdlist .= "destroy $chain\n";
3983         }
3984     }
3985
3986     foreach my $chain (keys %$ruleset) {
3987         my $stat = $statushash->{$chain};
3988         die "internal error" if !$stat;
3989
3990         if ($stat->{action} eq 'create') {
3991             foreach my $cmd (@{$ruleset->{$chain}}) {
3992                 $cmdlist .= "$cmd\n";
3993             }
3994         }
3995     }
3996
3997     foreach my $chain (keys %$ruleset) {
3998         my $stat = $statushash->{$chain};
3999         die "internal error" if !$stat;
4000
4001         if ($stat->{action} eq 'update') {
4002             my $chain_swap = $chain."_swap";
4003
4004             foreach my $cmd (@{$ruleset->{$chain}}) {
4005                 $cmd =~ s/$chain/$chain_swap/;
4006                 $cmdlist .= "$cmd\n";
4007             }
4008             $cmdlist .= "swap $chain_swap $chain\n";
4009             $cmdlist .= "flush $chain_swap\n";
4010             $cmdlist .= "destroy $chain_swap\n";
4011         }
4012     }
4013
4014      # the remove unused chains
4015     foreach my $chain (keys %$statushash) {
4016         next if $statushash->{$chain}->{action} ne 'delete';
4017
4018         $delete_cmdlist .= "flush $chain\n";
4019         $delete_cmdlist .= "destroy $chain\n";
4020     }
4021
4022     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4023
4024     return ($cmdlist, $delete_cmdlist, $changes);
4025 }
4026
4027 sub apply_ruleset {
4028     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
4029
4030     enable_bridge_firewall();
4031
4032     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4033         get_ipset_cmdlist($ipset_ruleset, $verbose);
4034
4035     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
4036     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
4037     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
4038
4039     if ($verbose) {
4040         if ($ipset_changes) {
4041             print "ipset changes:\n";
4042             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4043             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4044         }
4045
4046         if ($changes) {
4047             print "iptables changes:\n";
4048             print $cmdlist;
4049         }
4050
4051         if ($changesv6) {
4052             print "ip6tables changes:\n";
4053             print $cmdlistv6;
4054         }
4055
4056         if ($ebtables_changes) {
4057             print "ebtables changes:\n";
4058             print $ebtables_cmdlist;
4059         }
4060     }
4061
4062     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4063     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4064
4065     ipset_restore_cmdlist($ipset_create_cmdlist);
4066
4067     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4068     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4069
4070     iptables_restore_cmdlist($cmdlist);
4071
4072     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4073     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4074
4075     ip6tables_restore_cmdlist($cmdlistv6);
4076
4077     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4078     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4079
4080     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4081
4082     ebtables_restore_cmdlist($ebtables_cmdlist);
4083
4084     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4085     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4086
4087     # test: re-read status and check if everything is up to date
4088     my $active_chains = iptables_get_chains();
4089     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
4090
4091     my $errors;
4092     foreach my $chain (sort keys %$ruleset) {
4093         my $stat = $statushash->{$chain};
4094         if ($stat->{action} ne 'exists') {
4095             warn "unable to update chain '$chain'\n";
4096             $errors = 1;
4097         }
4098     }
4099
4100     my $active_chainsv6 = iptables_get_chains("ip6tables");
4101     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
4102
4103     foreach my $chain (sort keys %$rulesetv6) {
4104         my $stat = $statushashv6->{$chain};
4105         if ($stat->{action} ne 'exists') {
4106             warn "unable to update chain '$chain'\n";
4107             $errors = 1;
4108         }
4109     }
4110
4111     my $active_ebtables_chains = ebtables_get_chains();
4112     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4113                                 $active_ebtables_chains, \&iptables_chain_digest,
4114                                 0, $pve_ebtables_chainname_regex);
4115
4116     foreach my $chain (sort keys %$ebtables_ruleset) {
4117         my $stat = $ebtables_statushash->{$chain};
4118         if ($stat->{action} ne 'exists') {
4119             warn "ebtables : unable to update chain '$chain'\n";
4120             $errors = 1;
4121         }
4122     }
4123
4124     die "unable to apply firewall changes\n" if $errors;
4125
4126     update_nf_conntrack_max($hostfw_conf);
4127
4128     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4129
4130     update_nf_conntrack_logging($hostfw_conf);
4131 }
4132
4133 sub update_nf_conntrack_max {
4134     my ($hostfw_conf) = @_;
4135
4136     my $max = 65536; # reasonable default
4137
4138     my $options = $hostfw_conf->{options} || {};
4139
4140     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4141         $max = $options->{nf_conntrack_max};
4142         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4143     }
4144
4145     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4146     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4147
4148     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4149
4150     if ($current != $max) {
4151         my $hashsize = int($max/4);
4152         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4153         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4154     }
4155 }
4156
4157 sub update_nf_conntrack_tcp_timeout_established {
4158     my ($hostfw_conf) = @_;
4159
4160     my $options = $hostfw_conf->{options} || {};
4161
4162     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4163
4164     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4165 }
4166
4167 my $log_nf_conntrack_enabled = undef;
4168 sub update_nf_conntrack_logging {
4169     my ($hostfw_conf) = @_;
4170
4171     my $options = $hostfw_conf->{options} || {};
4172     my $value = $options->{log_nf_conntrack} || 0;
4173     if (!defined($log_nf_conntrack_enabled)
4174         || $value != $log_nf_conntrack_enabled)
4175     {
4176         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4177         PVE::Tools::file_set_contents($tmpfile, $value);
4178
4179         PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4180         $log_nf_conntrack_enabled = $value;
4181     }
4182 }
4183
4184 sub remove_pvefw_chains {
4185
4186     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4187     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4188     PVE::Firewall::remove_pvefw_chains_ipset();
4189
4190 }
4191
4192 sub remove_pvefw_chains_iptables {
4193     my ($iptablescmd) = @_;
4194
4195     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4196     my $cmdlist = "*filter\n";
4197
4198     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4199         if ($hooks->{$h}) {
4200             $cmdlist .= "-D $h -j PVEFW-$h\n";
4201         }
4202     }
4203
4204     foreach my $chain (keys %$chash) {
4205         $cmdlist .= "-F $chain\n";
4206     }
4207
4208     foreach my $chain (keys %$chash) {
4209         $cmdlist .= "-X $chain\n";
4210     }
4211     $cmdlist .= "COMMIT\n";
4212
4213     if($iptablescmd eq "ip6tables") {
4214         ip6tables_restore_cmdlist($cmdlist);
4215     } else {
4216         iptables_restore_cmdlist($cmdlist);
4217     }
4218 }
4219
4220 sub remove_pvefw_chains_ipset {
4221
4222     my $ipset_chains = ipset_get_chains();
4223
4224     my $cmdlist = "";
4225
4226     foreach my $chain (keys %$ipset_chains) {
4227         $cmdlist .= "flush $chain\n";
4228         $cmdlist .= "destroy $chain\n";
4229     }
4230
4231     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4232 }
4233
4234 sub init {
4235     my $cluster_conf = load_clusterfw_conf();
4236     my $cluster_options = $cluster_conf->{options};
4237     my $enable = $cluster_options->{enable};
4238
4239     return if !$enable;
4240
4241     # load required modules here
4242 }
4243
4244 sub update {
4245     my $code = sub {
4246
4247         my $cluster_conf = load_clusterfw_conf();
4248         my $cluster_options = $cluster_conf->{options};
4249
4250         if (!$cluster_options->{enable}) {
4251             PVE::Firewall::remove_pvefw_chains();
4252             return;
4253         }
4254
4255         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4256
4257         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4258
4259         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4260     };
4261
4262     run_locked($code);
4263 }
4264
4265 1;