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 => 'ACCEPT', 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 };
1252
1253 our $vm_option_properties = {
1254     enable => {
1255         description => "Enable/disable firewall rules.",
1256         type => 'boolean',
1257         optional => 1,
1258     },
1259     macfilter => {
1260         description => "Enable/disable MAC address filter.",
1261         type => 'boolean',
1262         optional => 1,
1263     },
1264     dhcp => {
1265         description => "Enable DHCP.",
1266         type => 'boolean',
1267         optional => 1,
1268     },
1269     ndp => {
1270         description => "Enable NDP.",
1271         type => 'boolean',
1272         optional => 1,
1273     },
1274     radv => {
1275         description => "Allow sending Router Advertisement.",
1276         type => 'boolean',
1277         optional => 1,
1278     },
1279     ipfilter => {
1280         description => "Enable default IP filters. " .
1281            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1282            "for every interface. Such ipsets implicitly contain sane default " .
1283            "restrictions such as restricting IPv6 link local addresses to " .
1284            "the one derived from the interface's MAC address. For containers " .
1285            "the configured IP addresses will be implicitly added.",
1286         type => 'boolean',
1287         optional => 1,
1288     },
1289     policy_in => {
1290         description => "Input policy.",
1291         type => 'string',
1292         optional => 1,
1293         enum => ['ACCEPT', 'REJECT', 'DROP'],
1294     },
1295     policy_out => {
1296         description => "Output policy.",
1297         type => 'string',
1298         optional => 1,
1299         enum => ['ACCEPT', 'REJECT', 'DROP'],
1300     },
1301     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1302         description => "Log level for incoming traffic." }),
1303     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1304         description => "Log level for outgoing traffic." }),
1305
1306 };
1307
1308
1309 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.";
1310
1311 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.";
1312
1313 my $rule_properties = {
1314     pos => {
1315         description => "Update rule at position <pos>.",
1316         type => 'integer',
1317         minimum => 0,
1318         optional => 1,
1319     },
1320     digest => get_standard_option('pve-config-digest'),
1321     type => {
1322         description => "Rule type.",
1323         type => 'string',
1324         optional => 1,
1325         enum => ['in', 'out', 'group'],
1326     },
1327     action => {
1328         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1329         type => 'string',
1330         optional => 1,
1331         pattern => $security_group_name_pattern,
1332         maxLength => 20,
1333         minLength => 2,
1334     },
1335     macro => {
1336         description => "Use predefined standard macro.",
1337         type => 'string',
1338         optional => 1,
1339         maxLength => 128,
1340     },
1341     iface => get_standard_option('pve-iface', {
1342         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.",
1343         optional => 1
1344     }),
1345     source => {
1346         description => "Restrict packet source address. $addr_list_descr",
1347         type => 'string', format => 'pve-fw-addr-spec',
1348         optional => 1,
1349     },
1350     dest => {
1351         description => "Restrict packet destination address. $addr_list_descr",
1352         type => 'string', format => 'pve-fw-addr-spec',
1353         optional => 1,
1354     },
1355     proto => {
1356         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1357         type => 'string', format => 'pve-fw-protocol-spec',
1358         optional => 1,
1359     },
1360     enable => {
1361         description => "Flag to enable/disable a rule.",
1362         type => 'integer',
1363         minimum => 0,
1364         optional => 1,
1365     },
1366     log => get_standard_option('pve-fw-loglevel', {
1367         description => "Log level for firewall rule.",
1368     }),
1369     sport => {
1370         description => "Restrict TCP/UDP source port. $port_descr",
1371         type => 'string', format => 'pve-fw-sport-spec',
1372         optional => 1,
1373     },
1374     dport => {
1375         description => "Restrict TCP/UDP destination port. $port_descr",
1376         type => 'string', format => 'pve-fw-dport-spec',
1377         optional => 1,
1378     },
1379     comment => {
1380         description => "Descriptive comment.",
1381         type => 'string',
1382         optional => 1,
1383     },
1384 };
1385
1386 sub add_rule_properties {
1387     my ($properties) = @_;
1388
1389     foreach my $k (keys %$rule_properties) {
1390         my $h = $rule_properties->{$k};
1391         # copy data, so that we can modify later without side effects
1392         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1393     }
1394
1395     return $properties;
1396 }
1397
1398 sub delete_rule_properties {
1399     my ($rule, $delete_str) = @_;
1400
1401     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1402         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1403             if !defined($rule_properties->{$opt});
1404         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1405             if $opt eq 'type' || $opt eq 'action';
1406         delete $rule->{$opt};
1407     }
1408
1409     return $rule;
1410 }
1411
1412 my $apply_macro = sub {
1413     my ($macro_name, $param, $verify, $ipversion) = @_;
1414
1415     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1416     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1417
1418     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1419         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1420     }
1421
1422     # skip macros which are specific to another ipversion
1423     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1424         return if $ipversion != $required;
1425     }
1426
1427     my $rules = [];
1428
1429     foreach my $templ (@$macro_rules) {
1430         my $rule = {};
1431         my $param_used = {};
1432         foreach my $k (keys %$templ) {
1433             my $v = $templ->{$k};
1434             if ($v eq 'PARAM') {
1435                 $v = $param->{$k};
1436                 $param_used->{$k} = 1;
1437             } elsif ($v eq 'DEST') {
1438                 $v = $param->{dest};
1439                 $param_used->{dest} = 1;
1440             } elsif ($v eq 'SOURCE') {
1441                 $v = $param->{source};
1442                 $param_used->{source} = 1;
1443             }
1444
1445             if (!defined($v)) {
1446                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1447                 raise_param_exc({ macro => $msg }) if $verify;
1448                 die "$msg\n";
1449             }
1450             $rule->{$k} = $v;
1451         }
1452         foreach my $k (keys %$param) {
1453             next if $k eq 'macro';
1454             next if !defined($param->{$k});
1455             next if $param_used->{$k};
1456             if (defined($rule->{$k})) {
1457                 if ($rule->{$k} ne $param->{$k}) {
1458                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1459                     raise_param_exc({ $k => $msg }) if $verify;
1460                     die "$msg\n";
1461                 }
1462             } else {
1463                 $rule->{$k} = $param->{$k};
1464             }
1465         }
1466         push @$rules, $rule;
1467     }
1468
1469     return $rules;
1470 };
1471
1472 my $rule_env_iface_lookup = {
1473     'ct' => 1,
1474     'vm' => 1,
1475     'group' => 0,
1476     'cluster' => 1,
1477     'host' => 1,
1478 };
1479
1480 sub verify_rule {
1481     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1482
1483     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1484
1485     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1486     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1487
1488     my $errors = $rule->{errors} || {};
1489
1490     my $error_count = 0;
1491
1492     my $add_error = sub {
1493         my ($param, $msg)  = @_;
1494         chomp $msg;
1495         raise_param_exc({ $param => $msg }) if !$noerr;
1496         $error_count++;
1497         $errors->{$param} = $msg if !$errors->{$param};
1498     };
1499
1500     my $ipversion;
1501     my $set_ip_version = sub {
1502         my $vers = shift;
1503         if ($vers) {
1504             die "detected mixed ipv4/ipv6 adresses in rule\n"
1505                 if $ipversion && ($vers != $ipversion);
1506             $ipversion = $vers;
1507         }
1508     };
1509
1510     my $check_ipset_or_alias_property = sub {
1511         my ($name, $expected_ipversion) = @_;
1512
1513         if (my $value = $rule->{$name}) {
1514             if ($value =~ m/^\+/) {
1515                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1516                     &$add_error($name, "no such ipset '$1'")
1517                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1518
1519                 } else {
1520                     &$add_error($name, "invalid ipset name '$value'");
1521                 }
1522             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1523                 my $alias = lc($value);
1524                 &$add_error($name, "no such alias '$value'")
1525                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1526                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1527                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1528
1529                 &$set_ip_version($e->{ipversion});
1530             }
1531         }
1532     };
1533
1534     my $type = $rule->{type};
1535     my $action = $rule->{action};
1536
1537     &$add_error('type', "missing property") if !$type;
1538     &$add_error('action', "missing property") if !$action;
1539
1540     if ($type) {
1541         if ($type eq  'in' || $type eq 'out') {
1542             &$add_error('action', "unknown action '$action'")
1543                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1544         } elsif ($type eq 'group') {
1545             &$add_error('type', "security groups not allowed")
1546                 if !$allow_groups;
1547             &$add_error('action', "invalid characters in security group name")
1548                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1549         } else {
1550             &$add_error('type', "unknown rule type '$type'");
1551         }
1552     }
1553
1554     if ($rule->{iface}) {
1555         &$add_error('type', "parameter -i not allowed for this rule type")
1556             if !$allow_iface;
1557         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1558         &$add_error('iface', $@) if $@;
1559         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1560             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1561                 if $rule->{iface} !~  m/^net(\d+)$/;
1562         }
1563     }
1564
1565     if ($rule->{macro}) {
1566         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1567             $rule->{macro} = $preferred_name;
1568         } else {
1569             &$add_error('macro', "unknown macro '$rule->{macro}'");
1570         }
1571     }
1572
1573     if ($rule->{proto}) {
1574         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1575         &$add_error('proto', $@) if $@;
1576         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1577         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1578     }
1579
1580     if ($rule->{dport}) {
1581         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1582         &$add_error('dport', $@) if $@;
1583         my $proto = $rule->{proto};
1584         &$add_error('proto', "missing property - 'dport' requires this property")
1585             if !$proto;
1586         &$add_error('dport', "protocol '$proto' does not support ports")
1587             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1588                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1589     }
1590
1591     if ($rule->{sport}) {
1592         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1593         &$add_error('sport', $@) if $@;
1594         my $proto = $rule->{proto};
1595         &$add_error('proto', "missing property - 'sport' requires this property")
1596             if !$proto;
1597         &$add_error('sport', "protocol '$proto' does not support ports")
1598             if !$PROTOCOLS_WITH_PORTS->{$proto};
1599     }
1600
1601     if ($rule->{source}) {
1602         eval {
1603             my $source_ipversion = parse_address_list($rule->{source});
1604             &$set_ip_version($source_ipversion);
1605         };
1606         &$add_error('source', $@) if $@;
1607         &$check_ipset_or_alias_property('source', $ipversion);
1608     }
1609
1610     if ($rule->{dest}) {
1611         eval {
1612             my $dest_ipversion = parse_address_list($rule->{dest});
1613             &$set_ip_version($dest_ipversion);
1614         };
1615         &$add_error('dest', $@) if $@;
1616         &$check_ipset_or_alias_property('dest', $ipversion);
1617     }
1618
1619     $rule->{ipversion} = $ipversion if $ipversion;
1620
1621     if ($rule->{macro} && !$error_count) {
1622         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1623         if (my $err = $@) {
1624             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1625                 my $eh = $err->{errors};
1626                 foreach my $p (keys %$eh) {
1627                     &$add_error($p, $eh->{$p});
1628                 }
1629             } else {
1630                 &$add_error('macro', "$err");
1631             }
1632         }
1633     }
1634
1635     $rule->{errors} = $errors if $error_count;
1636
1637     return $rule;
1638 }
1639
1640 sub copy_rule_data {
1641     my ($rule, $param) = @_;
1642
1643     foreach my $k (keys %$rule_properties) {
1644         if (defined(my $v = $param->{$k})) {
1645             if ($v eq '' || $v eq '-') {
1646                 delete $rule->{$k};
1647             } else {
1648                 $rule->{$k} = $v;
1649             }
1650         }
1651     }
1652
1653     return $rule;
1654 }
1655
1656 sub rules_modify_permissions {
1657     my ($rule_env) = @_;
1658
1659     if ($rule_env eq 'host') {
1660         return {
1661             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1662         };
1663     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1664         return {
1665             check => ['perm', '/', [ 'Sys.Modify' ]],
1666         };
1667     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1668         return {
1669             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1670         }
1671     }
1672
1673     return undef;
1674 }
1675
1676 sub rules_audit_permissions {
1677     my ($rule_env) = @_;
1678
1679     if ($rule_env eq 'host') {
1680         return {
1681             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1682         };
1683     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1684         return {
1685             check => ['perm', '/', [ 'Sys.Audit' ]],
1686         };
1687     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1688         return {
1689             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1690         }
1691     }
1692
1693     return undef;
1694 }
1695
1696 # core functions
1697 my $bridge_firewall_enabled = 0;
1698
1699 sub enable_bridge_firewall {
1700
1701     return if $bridge_firewall_enabled; # only once
1702
1703     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1704     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1705
1706     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1707     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1708
1709     $bridge_firewall_enabled = 1;
1710 }
1711
1712 sub iptables_restore_cmdlist {
1713     my ($cmdlist) = @_;
1714
1715     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1716 }
1717
1718 sub ip6tables_restore_cmdlist {
1719     my ($cmdlist) = @_;
1720
1721     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1722 }
1723
1724 sub ipset_restore_cmdlist {
1725     my ($cmdlist) = @_;
1726
1727     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1728 }
1729
1730 sub ebtables_restore_cmdlist {
1731     my ($cmdlist) = @_;
1732
1733     run_command("/sbin/ebtables-restore", input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1734 }
1735
1736 sub iptables_get_chains {
1737     my ($iptablescmd) = @_;
1738
1739     $iptablescmd = "iptables" if !$iptablescmd;
1740
1741     my $res = {};
1742
1743     # check what chains we want to track
1744     my $is_pvefw_chain = sub {
1745         my $name = shift;
1746
1747         return 1 if $name =~ m/^PVEFW-\S+$/;
1748
1749         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1750
1751         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1752
1753         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1754         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1755
1756         return undef;
1757     };
1758
1759     my $table = '';
1760
1761     my $hooks = {};
1762
1763     my $parser = sub {
1764         my $line = shift;
1765
1766         return if $line =~ m/^#/;
1767         return if $line =~ m/^\s*$/;
1768
1769         if ($line =~ m/^\*(\S+)$/) {
1770             $table = $1;
1771             return;
1772         }
1773
1774         return if $table ne 'filter';
1775
1776         if ($line =~ m/^:(\S+)\s/) {
1777             my $chain = $1;
1778             return if !&$is_pvefw_chain($chain);
1779             $res->{$chain} = "unknown";
1780         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1781             my ($chain, $sig) = ($1, $2);
1782             return if !&$is_pvefw_chain($chain);
1783             $res->{$chain} = $sig;
1784         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1785             $hooks->{$1} = 1;
1786         } else {
1787             # simply ignore the rest
1788             return;
1789         }
1790     };
1791
1792     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1793
1794     return wantarray ? ($res, $hooks) : $res;
1795 }
1796
1797 sub iptables_chain_digest {
1798     my ($rules) = @_;
1799     my $digest = Digest::SHA->new('sha1');
1800     foreach my $rule (@$rules) { # order is important
1801         $digest->add($rule);
1802     }
1803     return $digest->b64digest;
1804 }
1805
1806 sub ipset_chain_digest {
1807     my ($rules) = @_;
1808
1809     my $digest = Digest::SHA->new('sha1');
1810     foreach my $rule (sort @$rules) { # note: sorted
1811         $digest->add($rule);
1812     }
1813     return $digest->b64digest;
1814 }
1815
1816 sub ipset_get_chains {
1817
1818     my $res = {};
1819     my $chains = {};
1820
1821     my $parser = sub {
1822         my $line = shift;
1823
1824         return if $line =~ m/^#/;
1825         return if $line =~ m/^\s*$/;
1826         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1827             my $chain = $1;
1828             $line =~ s/\s+$//; # delete trailing white space
1829             push @{$chains->{$chain}}, $line;
1830         } else {
1831             # simply ignore the rest
1832             return;
1833         }
1834     };
1835
1836     run_command("/sbin/ipset save", outfunc => $parser);
1837
1838     # compute digest for each chain
1839     foreach my $chain (keys %$chains) {
1840         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1841     }
1842
1843     return $res;
1844 }
1845
1846 sub ebtables_get_chains {
1847
1848     my $res = {};
1849     my $chains = {};
1850     my $parser = sub {
1851         my $line = shift;
1852         return if $line =~ m/^#/;
1853         return if $line =~ m/^\s*$/;
1854         if ($line =~ m/^:(\S+)\s\S+$/) {
1855             # Make sure we know chains exist even if they're empty.
1856             $chains->{$1} //= [];
1857         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1858             my $chain = $1;
1859             $line =~ s/\s+$//;
1860             push @{$chains->{$chain}}, $line;
1861         } else {
1862             # simply ignore the rest
1863             return;
1864         }
1865     };
1866
1867     run_command("/sbin/ebtables-save", outfunc => $parser);
1868     # compute digest for each chain and store rules as well
1869     foreach my $chain (keys %$chains) {
1870         $res->{$chain}->{rules} = $chains->{$chain};
1871         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1872     }
1873     return $res;
1874 }
1875
1876 # substitude action of rule according to action hash
1877 sub rule_substitude_action {
1878     my ($rule, $actions) = @_;
1879
1880     if (my $action = $rule->{action}) {
1881         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1882     }
1883 }
1884
1885 # generate a src or dst match
1886 # $dir(ection) is either d or s
1887 sub ipt_gen_src_or_dst_match {
1888     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1889
1890     my $srcdst;
1891     if ($dir eq 's') {
1892         $srcdst = "src";
1893     } elsif ($dir eq 'd') {
1894         $srcdst = "dst";
1895     } else {
1896         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1897     }
1898
1899     my $match;
1900     if ($adr =~ m/^\+/) {
1901         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1902             my $name = $1;
1903             my $ipset_chain;
1904             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1905                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1906             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1907                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1908             } else {
1909                 die "no such ipset '$name'\n";
1910             }
1911             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1912         } else {
1913             die "invalid security group name '$adr'\n";
1914         }
1915     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1916         my $alias = lc($adr);
1917         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1918         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1919         die "no such alias '$adr'\n" if !$e;
1920         $match = "-${dir} $e->{cidr}";
1921     } elsif ($adr =~ m/\-/){
1922         $match = "-m iprange --${srcdst}-range $adr";
1923     } else {
1924         $match = "-${dir} $adr";
1925     }
1926
1927     return $match;
1928 }
1929
1930 # convert a %rule to an array of iptables commands
1931 sub ipt_rule_to_cmds {
1932     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1933
1934     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1935
1936     my @match = ();
1937
1938     if (defined $rule->{match}) {
1939         push @match, $rule->{match};
1940     } else {
1941         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1942         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1943
1944         if ($rule->{source}) {
1945             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1946         }
1947         if ($rule->{dest}) {
1948             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1949         }
1950
1951         if (my $proto = $rule->{proto}) {
1952             push @match, "-p $proto";
1953
1954             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1955             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1956
1957             my $add_dport = sub {
1958                 return if !$rule->{dport};
1959
1960                 if ($proto eq 'icmp') {
1961                     # Note: we use dport to store --icmp-type
1962                     die "unknown icmp-type '$rule->{dport}'\n"
1963                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1964                     push @match, "-m icmp --icmp-type $rule->{dport}";
1965                 } elsif ($proto eq 'icmpv6') {
1966                     # Note: we use dport to store --icmpv6-type
1967                     die "unknown icmpv6-type '$rule->{dport}'\n"
1968                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1969                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1970                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1971                     die "protocol $proto does not have ports\n";
1972                 } elsif ($multidport) {
1973                     push @match, "--match multiport", "--dports $rule->{dport}";
1974                 } else {
1975                     push @match, "--dport $rule->{dport}";
1976                 }
1977             };
1978
1979             my $add_sport = sub {
1980                 return if !$rule->{sport};
1981
1982                 die "protocol $proto does not have ports\n"
1983                     if !$PROTOCOLS_WITH_PORTS->{$proto};
1984                 if ($multisport) {
1985                     push @match, "--match multiport", "--sports $rule->{sport}";
1986                 } else {
1987                     push @match, "--sport $rule->{sport}";
1988                 }
1989             };
1990
1991             # order matters - single port before multiport!
1992             $add_dport->() if $multisport;
1993             $add_sport->();
1994             $add_dport->() if !$multisport;
1995         } elsif ($rule->{dport} || $rule->{sport}) {
1996             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1997             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1998         }
1999
2000         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2001     }
2002     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2003
2004     my $targetstr;
2005     if (defined $rule->{target}) {
2006         $targetstr = $rule->{target};
2007     } else {
2008         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2009         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2010         $targetstr = ($goto) ? "-g $action" : "-j $action";
2011     }
2012
2013     my @iptcmds;
2014     if ($rule->{log} && $rule->{log} ne 'nolog') {
2015         my $log = $rule->{log};
2016         my $loglevel = $log_level_hash->{$log};
2017         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2018         push @iptcmds, "-A $chain $matchstr $logaction";
2019     }
2020     push @iptcmds, "-A $chain $matchstr $targetstr";
2021     return @iptcmds;
2022 }
2023
2024 sub ruleset_generate_rule {
2025     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2026
2027     my $rules;
2028
2029     if ($rule->{macro}) {
2030         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2031     } else {
2032         $rules = [ $rule ];
2033     }
2034
2035     # update all or nothing
2036     my @ipt_rule_cmds;
2037     foreach my $r (@$rules) {
2038         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2039     }
2040     foreach my $c (@ipt_rule_cmds) {
2041         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2042     }
2043 }
2044
2045 sub ruleset_create_chain {
2046     my ($ruleset, $chain) = @_;
2047
2048     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2049     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2050
2051     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2052
2053     $ruleset->{$chain} = [];
2054 }
2055
2056 sub ruleset_chain_exist {
2057     my ($ruleset, $chain) = @_;
2058
2059     return $ruleset->{$chain} ? 1 : undef;
2060 }
2061
2062 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2063 sub ruleset_add_ipt_cmd {
2064    my ($ruleset, $chain, $iptcmd) = @_;
2065
2066    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2067
2068    push @{$ruleset->{$chain}}, $iptcmd;
2069 }
2070
2071 sub ruleset_addrule {
2072     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2073
2074     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2075
2076     if ($log) {
2077         my $loglevel = $log_level_hash->{$log};
2078         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2079         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2080     }
2081     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2082     $match .= ' ' if length($match);
2083     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2084 }
2085
2086 sub ruleset_insertrule {
2087    my ($ruleset, $chain, $match, $action, $log) = @_;
2088
2089    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2090
2091    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2092 }
2093
2094 sub get_log_rule_base {
2095     my ($chain, $vmid, $msg, $loglevel) = @_;
2096
2097     $vmid = 0 if !defined($vmid);
2098     $msg = "" if !defined($msg);
2099
2100     # Note: we use special format for prefix to pass further
2101     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2102
2103     return "-m limit --limit 1/sec --limit-burst 1 -j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2104 }
2105
2106 sub ruleset_add_chain_policy {
2107     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2108
2109     if ($policy eq 'ACCEPT') {
2110
2111         my $rule = { action => 'ACCEPT' };
2112         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2113         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2114
2115     } elsif ($policy eq 'DROP') {
2116
2117         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2118
2119         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2120     } elsif ($policy eq 'REJECT') {
2121         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2122
2123         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2124     } else {
2125         # should not happen
2126         die "internal error: unknown policy '$policy'";
2127     }
2128 }
2129
2130 sub ruleset_chain_add_ndp {
2131     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2132     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2133
2134     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2135     if ($direction ne 'OUT' || $options->{radv}) {
2136         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2137     }
2138     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2139     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2140 }
2141
2142 sub ruleset_chain_add_conn_filters {
2143     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2144
2145     if (!$allow_invalid) {
2146         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2147     }
2148     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2149 }
2150
2151 sub ruleset_chain_add_input_filters {
2152     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2153
2154     if ($cluster_conf->{ipset}->{blacklist}){
2155         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2156             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2157             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2158         }
2159         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2160         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2161     }
2162
2163     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2164         if ($ipversion == 4) {
2165             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2166         }
2167     }
2168
2169     if ($options->{tcpflags}) {
2170         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2171     }
2172 }
2173
2174 sub ruleset_create_vm_chain {
2175     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2176
2177     ruleset_create_chain($ruleset, $chain);
2178     my $accept = generate_nfqueue($options);
2179
2180     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2181         if ($ipversion == 4) {
2182             if ($direction eq 'OUT') {
2183                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2184                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2185                                         proto => 'udp', sport => 68, dport => 67 });
2186             } else {
2187                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2188                                       { action => 'ACCEPT',
2189                                         proto => 'udp', sport => 67, dport => 68 });
2190             }
2191         } elsif ($ipversion == 6) {
2192             if ($direction eq 'OUT') {
2193                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2194                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2195                                         proto => 'udp', sport => 546, dport => 547 });
2196             } else {
2197                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2198                                       { action => 'ACCEPT',
2199                                         proto => 'udp', sport => 547, dport => 546 });
2200             }
2201         }
2202
2203     }
2204
2205     if ($direction eq 'OUT') {
2206         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2207             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2208         }
2209         if ($ipversion == 6 && !$options->{radv}) {
2210             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2211         }
2212         if ($ipfilter_ipset) {
2213             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2214         }
2215         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2216     }
2217
2218     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2219     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2220 }
2221
2222 sub ruleset_add_group_rule {
2223     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2224
2225     my $group = $rule->{action};
2226     my $group_chain = "GROUP-$group-$direction";
2227     if(!ruleset_chain_exist($ruleset, $group_chain)){
2228         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2229     }
2230
2231     if ($direction eq 'OUT' && $rule->{iface_out}) {
2232         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2233     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2234         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2235     } else {
2236         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2237     }
2238
2239     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2240 }
2241
2242 sub ruleset_generate_vm_rules {
2243     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2244
2245     my $lc_direction = lc($direction);
2246
2247     my $in_accept = generate_nfqueue($options);
2248
2249     foreach my $rule (@$rules) {
2250         next if $rule->{iface} && $rule->{iface} ne $netid;
2251         next if !$rule->{enable} || $rule->{errors};
2252         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2253
2254         if ($rule->{type} eq 'group') {
2255             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2256                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2257         } else {
2258             next if $rule->{type} ne $lc_direction;
2259             eval {
2260                 $rule->{logmsg} = "$rule->{action}: ";
2261                 if ($direction eq 'OUT') {
2262                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2263                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2264                 } else {
2265                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2266                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2267                 }
2268             };
2269             warn $@ if $@;
2270         }
2271     }
2272 }
2273
2274 sub generate_nfqueue {
2275     my ($options) = @_;
2276
2277     if ($options->{ips}) {
2278         my $action = "NFQUEUE";
2279         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2280             if (defined($3) && defined($1)) {
2281                 $action .= " --queue-balance $1:$3";
2282             } elsif (defined($1)) {
2283                 $action .= " --queue-num $1";
2284             }
2285         }
2286         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2287         return $action;
2288     } else {
2289         return "ACCEPT";
2290     }
2291 }
2292
2293 sub ruleset_generate_vm_ipsrules {
2294     my ($ruleset, $options, $direction, $iface) = @_;
2295
2296     if ($options->{ips} && $direction eq 'IN') {
2297         my $nfqueue = generate_nfqueue($options);
2298
2299         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2300             ruleset_create_chain($ruleset, "PVEFW-IPS");
2301         }
2302
2303         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2304     }
2305 }
2306
2307 sub generate_tap_rules_direction {
2308     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2309
2310     my $lc_direction = lc($direction);
2311
2312     my $rules = $vmfw_conf->{rules};
2313
2314     my $options = $vmfw_conf->{options};
2315     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2316
2317     my $tapchain = "$iface-$direction";
2318
2319     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2320     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2321         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2322
2323     # create chain with mac and ip filter
2324     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2325
2326     if ($options->{enable}) {
2327         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2328
2329         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2330
2331         # implement policy
2332         my $policy;
2333
2334         if ($direction eq 'OUT') {
2335             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2336         } else {
2337             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2338         }
2339
2340         my $accept = generate_nfqueue($options);
2341         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2342         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2343     } else {
2344         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2345         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2346     }
2347
2348     # plug the tap chain to bridge chain
2349     if ($direction eq 'IN') {
2350         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2351                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain", $loglevel, 'FWBR-IN: ', $vmid);
2352     } else {
2353         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2354                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain", $loglevel, 'FWBR-OUT: ', $vmid);
2355     }
2356 }
2357
2358 sub enable_host_firewall {
2359     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2360
2361     my $options = $hostfw_conf->{options};
2362     my $cluster_options = $cluster_conf->{options};
2363     my $rules = $hostfw_conf->{rules};
2364     my $cluster_rules = $cluster_conf->{rules};
2365
2366     # host inbound firewall
2367     my $chain = "PVEFW-HOST-IN";
2368     ruleset_create_chain($ruleset, $chain);
2369
2370     my $loglevel = get_option_log_level($options, "log_level_in");
2371
2372     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2373
2374     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2375     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2376     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2377
2378     # we use RETURN because we need to check also tap rules
2379     my $accept_action = 'RETURN';
2380
2381     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2382
2383     # add host rules first, so that cluster wide rules can be overwritten
2384     foreach my $rule (@$rules, @$cluster_rules) {
2385         next if !$rule->{enable} || $rule->{errors};
2386         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2387
2388         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2389
2390         eval {
2391             if ($rule->{type} eq 'group') {
2392                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2393             } elsif ($rule->{type} eq 'in') {
2394                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2395                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2396             }
2397         };
2398         warn $@ if $@;
2399         delete $rule->{iface_in};
2400     }
2401
2402     # allow standard traffic for management ipset (includes cluster network)
2403     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2404     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2405     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2406     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2407     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2408     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2409
2410     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2411     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2412
2413     # corosync
2414     if ($localnet && ($ipversion == $localnet_ver)) {
2415         my $corosync_rule = "-p udp --dport 5404:5405";
2416         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2417         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2418     }
2419
2420     # implement input policy
2421     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2422     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2423
2424     # host outbound firewall
2425     $chain = "PVEFW-HOST-OUT";
2426     ruleset_create_chain($ruleset, $chain);
2427
2428     $loglevel = get_option_log_level($options, "log_level_out");
2429
2430     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2431
2432     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2433
2434     # we use RETURN because we may want to check other thigs later
2435     $accept_action = 'RETURN';
2436     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2437
2438     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2439
2440     # add host rules first, so that cluster wide rules can be overwritten
2441     foreach my $rule (@$rules, @$cluster_rules) {
2442         next if !$rule->{enable} || $rule->{errors};
2443         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2444
2445         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2446         eval {
2447             $rule->{logmsg} = "$rule->{action}: ";
2448             if ($rule->{type} eq 'group') {
2449                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2450             } elsif ($rule->{type} eq 'out') {
2451                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2452                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2453             }
2454         };
2455         warn $@ if $@;
2456         delete $rule->{iface_out};
2457     }
2458
2459     # allow standard traffic on cluster network
2460     if ($localnet && ($ipversion == $localnet_ver)) {
2461         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2462         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2463         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2464         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2465
2466         my $corosync_rule = "-p udp --dport 5404:5405";
2467         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2468         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2469     }
2470
2471     # implement output policy
2472     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2473     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2474
2475     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2476     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2477 }
2478
2479 sub generate_group_rules {
2480     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2481
2482     my $rules = $cluster_conf->{groups}->{$group};
2483
2484     if (!$rules) {
2485         warn "no such security group '$group'\n";
2486         $rules = []; # create empty chain
2487     }
2488
2489     my $chain = "GROUP-${group}-IN";
2490
2491     ruleset_create_chain($ruleset, $chain);
2492     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2493
2494     foreach my $rule (@$rules) {
2495         next if $rule->{type} ne 'in';
2496         next if !$rule->{enable} || $rule->{errors};
2497         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2498         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2499         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2500     }
2501
2502     $chain = "GROUP-${group}-OUT";
2503
2504     ruleset_create_chain($ruleset, $chain);
2505     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2506
2507     foreach my $rule (@$rules) {
2508         next if $rule->{type} ne 'out';
2509         next if !$rule->{enable} || $rule->{errors};
2510         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2511         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2512         # check also other tap rules later
2513         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2514         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2515     }
2516 }
2517
2518 my $MAX_NETS = 32;
2519 my $valid_netdev_names = {};
2520 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2521     $valid_netdev_names->{"net$i"} = 1;
2522 }
2523
2524 sub get_mark_values {
2525     my ($value, $mask) = @_;
2526     $value = hex($value) if $value =~ /^0x/;
2527     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2528     $mask = 0xffffffff if !defined($mask);
2529     return ($value, $mask);
2530 }
2531
2532 sub parse_fw_rule {
2533     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2534
2535     my $orig_line = $line;
2536
2537     my $rule = {};
2538
2539     # we can add single line comments to the end of the rule
2540     if ($line =~ s/#\s*(.*?)\s*$//) {
2541         $rule->{comment} = decode('utf8', $1);
2542     }
2543
2544     # we can disable a rule when prefixed with '|'
2545
2546     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2547
2548     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2549         die "unable to parse rule: $line\n";
2550
2551     $rule->{type} = lc($1);
2552     $rule->{action} = $2;
2553
2554     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2555         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2556             $rule->{macro} = $1;
2557             $rule->{action} = $2;
2558         }
2559     }
2560
2561     while (length($line)) {
2562         if ($line =~ s/^-i (\S+)\s*//) {
2563             $rule->{iface} = $1;
2564             next;
2565         }
2566
2567         last if $rule->{type} eq 'group';
2568
2569         if ($line =~ s/^-p (\S+)\s*//) {
2570             $rule->{proto} = $1;
2571             next;
2572         }
2573
2574         if ($line =~ s/^-dport (\S+)\s*//) {
2575             $rule->{dport} = $1;
2576             next;
2577         }
2578
2579         if ($line =~ s/^-sport (\S+)\s*//) {
2580             $rule->{sport} = $1;
2581             next;
2582         }
2583         if ($line =~ s/^-source (\S+)\s*//) {
2584             $rule->{source} = $1;
2585             next;
2586         }
2587         if ($line =~ s/^-dest (\S+)\s*//) {
2588             $rule->{dest} = $1;
2589             next;
2590         }
2591         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2592             $rule->{log} = $1;
2593             next;
2594         }
2595
2596         last;
2597     }
2598
2599     die "unable to parse rule parameters: $line\n" if length($line);
2600
2601     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2602     if ($rule->{errors}) {
2603         # The verbose flag really means we're running from the CLI and want
2604         # output on the console - in the other case we really want such errors
2605         # to go into the syslog instead.
2606         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2607         $log->("$prefix - errors in rule parameters: $orig_line\n");
2608         foreach my $p (keys %{$rule->{errors}}) {
2609             $log->("  $p: $rule->{errors}->{$p}\n");
2610         }
2611     }
2612
2613     return $rule;
2614 }
2615
2616 sub verify_ethertype {
2617     my ($value) = @_;
2618     my $types = get_etc_ethertypes();
2619     die "unknown ethernet protocol type: $value\n"
2620         if !defined($types->{byname}->{$value}) &&
2621            !defined($types->{byid}->{$value});
2622 }
2623
2624 sub parse_vmfw_option {
2625     my ($line) = @_;
2626
2627     my ($opt, $value);
2628
2629     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2630
2631     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2632         $opt = lc($1);
2633         $value = int($2);
2634     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2635         $opt = lc($1);
2636         $value = $2 ? lc($3) : '';
2637     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2638         $opt = lc($1);
2639         $value = uc($3);
2640     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2641         $opt = lc($1);
2642         $value = $2;
2643     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2644         $opt = lc($1);
2645         $value = $2;
2646         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2647     } else {
2648         die "can't parse option '$line'\n"
2649     }
2650
2651     return ($opt, $value);
2652 }
2653
2654 sub parse_hostfw_option {
2655     my ($line) = @_;
2656
2657     my ($opt, $value);
2658
2659     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2660
2661     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid):\s*(0|1)\s*$/i) {
2662         $opt = lc($1);
2663         $value = int($2);
2664     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2665         $opt = lc($1);
2666         $value = $2 ? lc($3) : '';
2667     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2668         $opt = lc($1);
2669         $value = int($2);
2670     } else {
2671         die "can't parse option '$line'\n"
2672     }
2673
2674     return ($opt, $value);
2675 }
2676
2677 sub parse_clusterfw_option {
2678     my ($line) = @_;
2679
2680     my ($opt, $value);
2681
2682     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2683         $opt = lc($1);
2684         $value = int($2);
2685         if (($value > 1) && ((time() - $value) > 60)) {
2686             $value = 0
2687         }
2688     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2689         $opt = lc($1);
2690         $value = int($2);
2691     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2692         $opt = lc($1);
2693         $value = uc($3);
2694     } else {
2695         die "can't parse option '$line'\n"
2696     }
2697
2698     return ($opt, $value);
2699 }
2700
2701 sub resolve_alias {
2702     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2703
2704     my $alias = lc($cidr);
2705     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2706     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2707
2708     die "no such alias '$cidr'\n" if !$e;;
2709
2710     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2711 }
2712
2713 sub parse_ip_or_cidr {
2714     my ($cidr) = @_;
2715
2716     my $ipversion;
2717
2718     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2719         $cidr =~ s|/128$||;
2720         $ipversion = 6;
2721     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2722         $cidr =~ s|/32$||;
2723         $ipversion = 4;
2724     } else {
2725         die "value does not look like a valid IP address or CIDR network\n";
2726     }
2727
2728     return wantarray ? ($cidr, $ipversion) : $cidr;
2729 }
2730
2731 sub parse_alias {
2732     my ($line) = @_;
2733
2734     # we can add single line comments to the end of the line
2735     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2736
2737     if ($line =~ m/^(\S+)\s(\S+)$/) {
2738         my ($name, $cidr) = ($1, $2);
2739         my $ipversion;
2740
2741         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2742
2743         my $data = {
2744             name => $name,
2745             cidr => $cidr,
2746             ipversion => $ipversion,
2747         };
2748         $data->{comment} = $comment  if $comment;
2749         return $data;
2750     }
2751
2752     return undef;
2753 }
2754
2755 sub generic_fw_config_parser {
2756     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2757
2758     my $section;
2759     my $group;
2760
2761     my $res = $empty_conf;
2762
2763     while (defined(my $line = <$fh>)) {
2764         next if $line =~ m/^#/;
2765         next if $line =~ m/^\s*$/;
2766
2767         chomp $line;
2768
2769         my $linenr = $fh->input_line_number();
2770         my $prefix = "$filename (line $linenr)";
2771
2772         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2773             $section = 'options';
2774             next;
2775         }
2776
2777         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2778             $section = 'aliases';
2779             next;
2780         }
2781
2782         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2783             $section = 'groups';
2784             $group = lc($1);
2785             my $comment = $2;
2786             eval {
2787                 die "security group name too long\n" if length($group) > $max_group_name_length;
2788                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2789             };
2790             if (my $err = $@) {
2791                 ($section, $group, $comment) = undef;
2792                 warn "$prefix: $err";
2793                 next;
2794             }
2795
2796             $res->{$section}->{$group} = [];
2797             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2798                 if $comment;
2799             next;
2800         }
2801
2802         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2803             $section = 'rules';
2804             next;
2805         }
2806
2807         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2808             $section = 'ipset';
2809             $group = lc($1);
2810             my $comment = $2;
2811             eval {
2812                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2813                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2814             };
2815             if (my $err = $@) {
2816                 ($section, $group, $comment) = undef;
2817                 warn "$prefix: $err";
2818                 next;
2819             }
2820
2821             $res->{$section}->{$group} = [];
2822             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2823                 if $comment;
2824             next;
2825         }
2826
2827         if (!$section) {
2828             warn "$prefix: skip line - no section\n";
2829             next;
2830         }
2831
2832         if ($section eq 'options') {
2833             eval {
2834                 my ($opt, $value);
2835                 if ($rule_env eq 'cluster') {
2836                     ($opt, $value) = parse_clusterfw_option($line);
2837                 } elsif ($rule_env eq 'host') {
2838                     ($opt, $value) = parse_hostfw_option($line);
2839                 } else {
2840                     ($opt, $value) = parse_vmfw_option($line);
2841                 }
2842                 $res->{options}->{$opt} = $value;
2843             };
2844             warn "$prefix: $@" if $@;
2845         } elsif ($section eq 'aliases') {
2846             eval {
2847                 my $data = parse_alias($line);
2848                 $res->{aliases}->{lc($data->{name})} = $data;
2849             };
2850             warn "$prefix: $@" if $@;
2851         } elsif ($section eq 'rules') {
2852             my $rule;
2853             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2854             if (my $err = $@) {
2855                 warn "$prefix: $err";
2856                 next;
2857             }
2858             push @{$res->{$section}}, $rule;
2859         } elsif ($section eq 'groups') {
2860             my $rule;
2861             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2862             if (my $err = $@) {
2863                 warn "$prefix: $err";
2864                 next;
2865             }
2866             push @{$res->{$section}->{$group}}, $rule;
2867         } elsif ($section eq 'ipset') {
2868             # we can add single line comments to the end of the rule
2869             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2870
2871             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2872             my $nomatch = $1;
2873             my $cidr = $2;
2874             my $errors;
2875
2876             if ($nomatch && !$feature_ipset_nomatch) {
2877                 $errors->{nomatch} = "nomatch not supported by kernel";
2878             }
2879
2880             eval {
2881                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2882                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2883                 } else {
2884                     $cidr = parse_ip_or_cidr($cidr);
2885                 }
2886             };
2887             if (my $err = $@) {
2888                 chomp $err;
2889                 $errors->{cidr} = $err;
2890             }
2891
2892             if ($cidr =~ m!/0+$!) {
2893                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2894             }
2895
2896             my $entry = { cidr => $cidr };
2897             $entry->{nomatch} = 1 if $nomatch;
2898             $entry->{comment} = $comment if $comment;
2899             $entry->{errors} =  $errors if $errors;
2900
2901             if ($verbose && $errors) {
2902                 warn "$prefix - errors in ipset '$group': $line\n";
2903                 foreach my $p (keys %{$errors}) {
2904                     warn "  $p: $errors->{$p}\n";
2905                 }
2906             }
2907
2908             push @{$res->{$section}->{$group}}, $entry;
2909         } else {
2910             warn "$prefix: skip line - unknown section\n";
2911             next;
2912         }
2913     }
2914
2915     return $res;
2916 }
2917
2918 sub parse_hostfw_config {
2919     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2920
2921     my $empty_conf = { rules => [], options => {}};
2922
2923     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2924 }
2925
2926 sub parse_vmfw_config {
2927     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2928
2929     my $empty_conf = {
2930         rules => [],
2931         options => {},
2932         aliases => {},
2933         ipset => {} ,
2934         ipset_comments => {},
2935     };
2936
2937     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2938 }
2939
2940 sub parse_clusterfw_config {
2941     my ($filename, $fh, $verbose) = @_;
2942
2943     my $section;
2944     my $group;
2945
2946     my $empty_conf = {
2947         rules => [],
2948         options => {},
2949         aliases => {},
2950         groups => {},
2951         group_comments => {},
2952         ipset => {} ,
2953         ipset_comments => {},
2954     };
2955
2956     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2957 }
2958
2959 sub run_locked {
2960     my ($code, @param) = @_;
2961
2962     my $timeout = 10;
2963
2964     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2965
2966     die $@ if $@;
2967
2968     return $res;
2969 }
2970
2971 sub read_local_vm_config {
2972
2973     my $qemu = {};
2974     my $lxc = {};
2975
2976     my $vmdata = { qemu => $qemu, lxc => $lxc };
2977
2978     my $vmlist = PVE::Cluster::get_vmlist();
2979     return $vmdata if !$vmlist || !$vmlist->{ids};
2980     my $ids = $vmlist->{ids};
2981
2982     foreach my $vmid (keys %$ids) {
2983         next if !$vmid; # skip VE0
2984         my $d = $ids->{$vmid};
2985         next if !$d->{node} || $d->{node} ne $nodename;
2986         next if !$d->{type};
2987         if ($d->{type} eq 'qemu') {
2988             if ($have_qemu_server) {
2989                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2990                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2991                     $qemu->{$vmid} = $conf;
2992                 }
2993             }
2994         } elsif ($d->{type} eq 'lxc') {
2995             if ($have_lxc) {
2996                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2997                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2998                     $lxc->{$vmid} = $conf;
2999                 }
3000             }
3001         }
3002     }
3003
3004     return $vmdata;
3005 };
3006
3007 sub load_vmfw_conf {
3008     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
3009
3010     my $vmfw_conf = {};
3011
3012     $dir = $pvefw_conf_dir if !defined($dir);
3013
3014     my $filename = "$dir/$vmid.fw";
3015     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3016         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
3017         $vmfw_conf->{vmid} = $vmid;
3018     }
3019
3020     return $vmfw_conf;
3021 }
3022
3023 my $format_rules = sub {
3024     my ($rules, $allow_iface) = @_;
3025
3026     my $raw = '';
3027
3028     foreach my $rule (@$rules) {
3029         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3030             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3031             $raw .= uc($rule->{type});
3032             if ($rule->{macro}) {
3033                 $raw .= " $rule->{macro}($rule->{action})";
3034             } else {
3035                 $raw .= " " . $rule->{action};
3036             }
3037             if ($allow_iface && $rule->{iface}) {
3038                 $raw .= " -i $rule->{iface}";
3039             }
3040
3041             if ($rule->{type} ne  'group')  {
3042                 $raw .= " -source $rule->{source}" if $rule->{source};
3043                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3044                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3045                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3046                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3047                 $raw .= " -log $rule->{log}" if $rule->{log};
3048             }
3049
3050             $raw .= " # " . encode('utf8', $rule->{comment})
3051                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3052             $raw .= "\n";
3053         } else {
3054             die "unknown rule type '$rule->{type}'";
3055         }
3056     }
3057
3058     return $raw;
3059 };
3060
3061 my $format_options = sub {
3062     my ($options) = @_;
3063
3064     my $raw = '';
3065
3066     $raw .= "[OPTIONS]\n\n";
3067     foreach my $opt (keys %$options) {
3068         $raw .= "$opt: $options->{$opt}\n";
3069     }
3070     $raw .= "\n";
3071
3072     return $raw;
3073 };
3074
3075 my $format_aliases = sub {
3076     my ($aliases) = @_;
3077
3078     my $raw = '';
3079
3080     $raw .= "[ALIASES]\n\n";
3081     foreach my $k (keys %$aliases) {
3082         my $e = $aliases->{$k};
3083         $raw .= "$e->{name} $e->{cidr}";
3084         $raw .= " # " . encode('utf8', $e->{comment})
3085             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3086         $raw .= "\n";
3087     }
3088     $raw .= "\n";
3089
3090     return $raw;
3091 };
3092
3093 my $format_ipsets = sub {
3094     my ($fw_conf) = @_;
3095
3096     my $raw = '';
3097
3098     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3099         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3100             my $utf8comment = encode('utf8', $comment);
3101             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3102         } else {
3103             $raw .= "[IPSET $ipset]\n\n";
3104         }
3105         my $options = $fw_conf->{ipset}->{$ipset};
3106
3107         my $nethash = {};
3108         foreach my $entry (@$options) {
3109             $nethash->{$entry->{cidr}} = $entry;
3110         }
3111
3112         foreach my $cidr (sort keys %$nethash) {
3113             my $entry = $nethash->{$cidr};
3114             my $line = $entry->{nomatch} ? '!' : '';
3115             $line .= $entry->{cidr};
3116             $line .= " # " . encode('utf8', $entry->{comment})
3117                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3118             $raw .= "$line\n";
3119         }
3120
3121         $raw .= "\n";
3122     }
3123
3124     return $raw;
3125 };
3126
3127 sub save_vmfw_conf {
3128     my ($vmid, $vmfw_conf) = @_;
3129
3130     my $raw = '';
3131
3132     my $options = $vmfw_conf->{options};
3133     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3134
3135     my $aliases = $vmfw_conf->{aliases};
3136     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3137
3138     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3139
3140     my $rules = $vmfw_conf->{rules} || [];
3141     if ($rules && scalar(@$rules)) {
3142         $raw .= "[RULES]\n\n";
3143         $raw .= &$format_rules($rules, 1);
3144         $raw .= "\n";
3145     }
3146
3147     my $filename = "$pvefw_conf_dir/$vmid.fw";
3148     if ($raw) {
3149         mkdir $pvefw_conf_dir;
3150         PVE::Tools::file_set_contents($filename, $raw);
3151     } else {
3152         unlink $filename;
3153     }
3154 }
3155
3156 sub remove_vmfw_conf {
3157     my ($vmid) = @_;
3158
3159     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3160
3161     unlink $vmfw_conffile;
3162 }
3163
3164 sub clone_vmfw_conf {
3165     my ($vmid, $newid) = @_;
3166
3167     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3168     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3169
3170     if (-f $clonevm_conffile) {
3171         unlink $clonevm_conffile;
3172     }
3173     if (-f $sourcevm_conffile) {
3174         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3175         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3176     }
3177 }
3178
3179 sub read_vm_firewall_configs {
3180     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3181
3182     my $vmfw_configs = {};
3183
3184     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3185         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3186         next if !$vmfw_conf->{options}; # skip if file does not exists
3187         $vmfw_configs->{$vmid} = $vmfw_conf;
3188     }
3189     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3190         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3191         next if !$vmfw_conf->{options}; # skip if file does not exists
3192         $vmfw_configs->{$vmid} = $vmfw_conf;
3193     }
3194
3195     return $vmfw_configs;
3196 }
3197
3198 sub get_option_log_level {
3199     my ($options, $k) = @_;
3200
3201     my $v = $options->{$k};
3202     $v = $default_log_level if !defined($v);
3203
3204     return undef if $v eq '' || $v eq 'nolog';
3205
3206     return $v if defined($log_level_hash->{$v});
3207
3208     warn "unknown log level ($k = '$v')\n";
3209
3210     return undef;
3211 }
3212
3213 sub generate_std_chains {
3214     my ($ruleset, $options, $ipversion) = @_;
3215
3216     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3217
3218     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3219     my $chain = 'PVEFW-smurflog';
3220     if ( $std_chains->{$chain} ) {
3221         foreach my $r (@{$std_chains->{$chain}}) {
3222           $r->{log} = $loglevel;
3223         }
3224     }
3225
3226     # same as shorewall logflags action.
3227     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3228     $chain = 'PVEFW-logflags';
3229     if ( $std_chains->{$chain} ) {
3230         foreach my $r (@{$std_chains->{$chain}}) {
3231           $r->{log} = $loglevel;
3232         }
3233     }
3234
3235     foreach my $chain (keys %$std_chains) {
3236         ruleset_create_chain($ruleset, $chain);
3237         foreach my $rule (@{$std_chains->{$chain}}) {
3238             if (ref($rule)) {
3239                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3240             } else {
3241                 die "rule $rule as string - should not happen";
3242             }
3243         }
3244     }
3245 }
3246
3247 sub generate_ipset_chains {
3248     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3249
3250     foreach my $ipset (keys %{$ipsets}) {
3251
3252         my $options = $ipsets->{$ipset};
3253
3254         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3255             if (my $ips = $device_ips->{$1}) {
3256                 $options = [@$options, @$ips];
3257             }
3258         }
3259
3260         # remove duplicates
3261         my $nethash = {};
3262         foreach my $entry (@$options) {
3263             next if $entry->{errors}; # skip entries with errors
3264             eval {
3265                 my ($cidr, $ver);
3266                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3267                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3268                 } else {
3269                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3270                 }
3271                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3272                 if ($ver == 6) {
3273                     # ip_compress_address takes an address only, no CIDR
3274                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3275                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3276                     $cidr .= $prefix_len if defined($prefix_len);
3277                     $cidr =~ s|/128$||;
3278                 } else {
3279                     $cidr =~ s|/32$||;
3280                 }
3281
3282                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3283             };
3284             warn $@ if $@;
3285         }
3286
3287         foreach my $ipversion (4, 6) {
3288             my $data = $nethash->{$ipversion};
3289
3290             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3291
3292             my $hashsize = scalar(@$options);
3293             if ($hashsize <= 64) {
3294                 $hashsize = 64;
3295             } else {
3296                 $hashsize = round_powerof2($hashsize);
3297             }
3298
3299             my $family = $ipversion == "6" ? "inet6" : "inet";
3300
3301             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3302
3303             foreach my $cidr (sort keys %$data) {
3304                 my $entry = $data->{$cidr};
3305
3306                 my $cmd = "add $name $cidr";
3307                 if ($entry->{nomatch}) {
3308                     if ($feature_ipset_nomatch) {
3309                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3310                     } else {
3311                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3312                     }
3313                 } else {
3314                     push @{$ipset_ruleset->{$name}}, $cmd;
3315                 }
3316             }
3317         }
3318     }
3319 }
3320
3321 sub round_powerof2 {
3322     my ($int) = @_;
3323
3324     $int--;
3325     $int |= $int >> $_ foreach (1,2,4,8,16);
3326     return ++$int;
3327 }
3328
3329 sub load_clusterfw_conf {
3330     my ($filename, $verbose) = @_;
3331
3332     $filename = $clusterfw_conf_filename if !defined($filename);
3333
3334     my $cluster_conf = {};
3335     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3336         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3337     }
3338
3339     return $cluster_conf;
3340 }
3341
3342 sub save_clusterfw_conf {
3343     my ($cluster_conf) = @_;
3344
3345     my $raw = '';
3346
3347     my $options = $cluster_conf->{options};
3348     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3349
3350     my $aliases = $cluster_conf->{aliases};
3351     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3352
3353     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3354
3355     my $rules = $cluster_conf->{rules};
3356     if ($rules && scalar(@$rules)) {
3357         $raw .= "[RULES]\n\n";
3358         $raw .= &$format_rules($rules, 1);
3359         $raw .= "\n";
3360     }
3361
3362     if ($cluster_conf->{groups}) {
3363         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3364             my $rules = $cluster_conf->{groups}->{$group};
3365             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3366                 my $utf8comment = encode('utf8', $comment);
3367                 $raw .= "[group $group] # $utf8comment\n\n";
3368             } else {
3369                 $raw .= "[group $group]\n\n";
3370             }
3371
3372             $raw .= &$format_rules($rules, 0);
3373             $raw .= "\n";
3374         }
3375     }
3376
3377     if ($raw) {
3378         mkdir $pvefw_conf_dir;
3379         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3380     } else {
3381         unlink $clusterfw_conf_filename;
3382     }
3383 }
3384
3385 sub load_hostfw_conf {
3386     my ($cluster_conf, $filename, $verbose) = @_;
3387
3388     $filename = $hostfw_conf_filename if !defined($filename);
3389
3390     my $hostfw_conf = {};
3391     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3392         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3393     }
3394     return $hostfw_conf;
3395 }
3396
3397 sub save_hostfw_conf {
3398     my ($hostfw_conf) = @_;
3399
3400     my $raw = '';
3401
3402     my $options = $hostfw_conf->{options};
3403     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3404
3405     my $rules = $hostfw_conf->{rules};
3406     if ($rules && scalar(@$rules)) {
3407         $raw .= "[RULES]\n\n";
3408         $raw .= &$format_rules($rules, 1);
3409         $raw .= "\n";
3410     }
3411
3412     if ($raw) {
3413         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3414     } else {
3415         unlink $hostfw_conf_filename;
3416     }
3417 }
3418
3419 sub compile {
3420     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3421
3422     my $vmfw_configs;
3423
3424     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3425     $pve_std_chains = dclone($pve_std_chains_conf);
3426
3427     if ($vmdata) { # test mode
3428         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3429         my $filename = "$testdir/cluster.fw";
3430         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3431
3432         $filename = "$testdir/host.fw";
3433         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3434
3435         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3436     } else { # normal operation
3437         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3438
3439         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3440
3441         $vmdata = read_local_vm_config();
3442         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3443     }
3444
3445     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3446
3447     my $localnet;
3448     if ($cluster_conf->{aliases}->{local_network}) {
3449         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3450     } else {
3451         my $localnet_ver;
3452         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3453
3454         $cluster_conf->{aliases}->{local_network} = {
3455             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3456     }
3457
3458     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3459
3460     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3461     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3462     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose);
3463     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3464
3465     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3466 }
3467
3468 sub compile_iptables_filter {
3469     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3470
3471     my $ruleset = {};
3472
3473     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3474     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3475
3476     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3477
3478     my $hostfw_options = $hostfw_conf->{options} || {};
3479
3480     # fixme: what log level should we use here?
3481     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3482
3483     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3484     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3485
3486     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3487     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3488
3489     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3490
3491     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3492     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3493
3494     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3495
3496     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3497
3498     if ($hostfw_enable) {
3499         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3500         warn $@ if $@; # just to be sure - should not happen
3501     }
3502
3503     # generate firewall rules for QEMU VMs
3504     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3505         eval {
3506             my $conf = $vmdata->{qemu}->{$vmid};
3507             my $vmfw_conf = $vmfw_configs->{$vmid};
3508             return if !$vmfw_conf;
3509
3510             foreach my $netid (sort keys %$conf) {
3511                 next if $netid !~ m/^net(\d+)$/;
3512                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3513                 next if !$net->{firewall};
3514                 my $iface = "tap${vmid}i$1";
3515
3516                 my $macaddr = $net->{macaddr};
3517                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3518                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3519                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3520                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3521             }
3522         };
3523         warn $@ if $@; # just to be sure - should not happen
3524     }
3525
3526     # generate firewall rules for LXC containers
3527     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3528         eval {
3529             my $conf = $vmdata->{lxc}->{$vmid};
3530             my $vmfw_conf = $vmfw_configs->{$vmid};
3531             return if !$vmfw_conf;
3532
3533             if ($vmfw_conf->{options}->{enable}) {
3534                 foreach my $netid (sort keys %$conf) {
3535                     next if $netid !~ m/^net(\d+)$/;
3536                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3537                     next if !$net->{firewall};
3538                     my $iface = "veth${vmid}i$1";
3539                     my $macaddr = $net->{hwaddr};
3540                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3541                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3542                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3543                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3544                 }
3545             }
3546         };
3547         warn $@ if $@; # just to be sure - should not happen
3548     }
3549
3550     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3551         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3552     }
3553
3554     return $ruleset;
3555 }
3556
3557 sub mac_to_linklocal {
3558     my ($macaddr) = @_;
3559     my @parts = split(/:/, $macaddr);
3560     # The standard link local address uses the fe80::/64 prefix with the
3561     # modified EUI-64 identifier derived from the MAC address by flipping the
3562     # universal/local bit and inserting FF:FE in the middle.
3563     # See RFC 4291.
3564     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3565     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3566     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3567 }
3568
3569 sub compile_ipsets {
3570     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3571
3572     my $localnet;
3573     if ($cluster_conf->{aliases}->{local_network}) {
3574         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3575     } else {
3576         my $localnet_ver;
3577         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3578
3579         $cluster_conf->{aliases}->{local_network} = {
3580             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3581     }
3582
3583     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3584
3585
3586     my $ipset_ruleset = {};
3587
3588     # generate ipsets for QEMU VMs
3589     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3590         eval {
3591             my $conf = $vmdata->{qemu}->{$vmid};
3592             my $vmfw_conf = $vmfw_configs->{$vmid};
3593             return if !$vmfw_conf;
3594
3595             # When the 'ipfilter' option is enabled every device for which there
3596             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3597             # ipset.
3598             # The reason is that ipfilter ipsets are always filled with standard
3599             # IPv6 link-local filters.
3600             my $ipsets = $vmfw_conf->{ipset};
3601             my $implicit_sets = {};
3602
3603             my $device_ips = {};
3604             foreach my $netid (keys %$conf) {
3605                 next if $netid !~ m/^net(\d+)$/;
3606                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3607                 next if !$net->{firewall};
3608
3609                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3610                     $implicit_sets->{"ipfilter-$netid"} = [];
3611                 }
3612
3613                 my $macaddr = $net->{macaddr};
3614                 my $linklocal = mac_to_linklocal($macaddr);
3615                 $device_ips->{$netid} = [
3616                     { cidr => $linklocal },
3617                     { cidr => 'fe80::/10', nomatch => 1 }
3618                 ];
3619             }
3620
3621             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3622             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3623         };
3624         warn $@ if $@; # just to be sure - should not happen
3625     }
3626
3627     # generate firewall rules for LXC containers
3628     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3629         eval {
3630             my $conf = $vmdata->{lxc}->{$vmid};
3631             my $vmfw_conf = $vmfw_configs->{$vmid};
3632             return if !$vmfw_conf;
3633
3634             # When the 'ipfilter' option is enabled every device for which there
3635             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3636             # ipset.
3637             # The reason is that ipfilter ipsets are always filled with standard
3638             # IPv6 link-local filters, as well as the IP addresses configured
3639             # for the container.
3640             my $ipsets = $vmfw_conf->{ipset};
3641             my $implicit_sets = {};
3642
3643             my $device_ips = {};
3644             foreach my $netid (keys %$conf) {
3645                 next if $netid !~ m/^net(\d+)$/;
3646                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3647                 next if !$net->{firewall};
3648
3649                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3650                     $implicit_sets->{"ipfilter-$netid"} = [];
3651                 }
3652
3653                 my $macaddr = $net->{hwaddr};
3654                 my $linklocal = mac_to_linklocal($macaddr);
3655                 my $set = $device_ips->{$netid} = [
3656                     { cidr => $linklocal },
3657                     { cidr => 'fe80::/10', nomatch => 1 }
3658                 ];
3659                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3660                     push @$set, { cidr => $1 };
3661                 }
3662                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3663                     push @$set, { cidr => $1 };
3664                 }
3665             }
3666
3667             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3668             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3669         };
3670         warn $@ if $@; # just to be sure - should not happen
3671     }
3672
3673     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3674
3675     return $ipset_ruleset;
3676 }
3677
3678 sub compile_ebtables_filter {
3679     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $verbose) = @_;
3680
3681     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3682         return {};
3683     }
3684
3685     my $ruleset = {};
3686
3687     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3688
3689     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3690     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3691     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3692     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3693     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3694
3695     # generate firewall rules for QEMU VMs
3696     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3697         eval {
3698             my $conf = $vmdata->{qemu}->{$vmid};
3699             my $vmfw_conf = $vmfw_configs->{$vmid};
3700             return if !$vmfw_conf;
3701             my $ipsets = $vmfw_conf->{ipset};
3702
3703             foreach my $netid (sort keys %$conf) {
3704                 next if $netid !~ m/^net(\d+)$/;
3705                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3706                 next if !$net->{firewall};
3707                 my $iface = "tap${vmid}i$1";
3708                 my $macaddr = $net->{macaddr};
3709                 my $arpfilter = [];
3710                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3711                     foreach my $ipaddr (@$ipset) {
3712                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3713                         next if !$ip || ($version && $version != 4);
3714                         push(@$arpfilter, $ip);
3715                     }
3716                 }
3717                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3718             }
3719         };
3720         warn $@ if $@; # just to be sure - should not happen
3721     }
3722
3723     # generate firewall rules for LXC containers
3724     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3725         eval {
3726             my $conf = $vmdata->{lxc}->{$vmid};
3727
3728             my $vmfw_conf = $vmfw_configs->{$vmid};
3729             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3730             my $ipsets = $vmfw_conf->{ipset};
3731
3732             foreach my $netid (sort keys %$conf) {
3733                 next if $netid !~ m/^net(\d+)$/;
3734                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3735                 next if !$net->{firewall};
3736                 my $iface = "veth${vmid}i$1";
3737                 my $macaddr = $net->{hwaddr};
3738                 my $arpfilter = [];
3739                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3740                     foreach my $ipaddr (@$ipset) {
3741                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3742                         next if !$ip || ($version && $version != 4);
3743                         push(@$arpfilter, $ip);
3744                     }
3745                 }
3746                 push(@$arpfilter, $net->{ip}) if $net->{ip} && $vmfw_conf->{options}->{ipfilter};
3747                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3748             }
3749         };
3750         warn $@ if $@; # just to be sure - should not happen
3751     }
3752
3753     return $ruleset;
3754 }
3755
3756 sub generate_tap_layer2filter {
3757     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3758     my $options = $vmfw_conf->{options};
3759
3760     my $tapchain = $iface."-OUT";
3761
3762     # ebtables remove zeros from mac pairs
3763     $macaddr =~ s/0([0-9a-f])/$1/ig;
3764     $macaddr = lc($macaddr);
3765
3766     ruleset_create_chain($ruleset, $tapchain);
3767
3768     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3769             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3770     }
3771
3772     if (@$arpfilter){
3773         my $arpchain = $tapchain."-ARP";
3774         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3775         ruleset_create_chain($ruleset, $arpchain);
3776
3777         foreach my $ip (@{$arpfilter}) {
3778             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3779         }
3780         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3781     }
3782
3783     if (defined($options->{layer2_protocols})){
3784         my $protochain = $tapchain."-PROTO";
3785         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3786         ruleset_create_chain($ruleset, $protochain);
3787
3788         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3789             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3790         }
3791         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3792     }
3793
3794     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3795
3796     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3797 }
3798
3799 # the parameter $change_only_regex changes two things if defined:
3800 # * all chains not matching it will be left intact
3801 # * both the $active_chains hash and the returned status_hash have different
3802 #   structure (they contain a key named 'rules').
3803 sub get_ruleset_status {
3804     my ($ruleset, $active_chains, $digest_fn, $verbose, $change_only_regex) = @_;
3805
3806     my $statushash = {};
3807
3808     foreach my $chain (sort keys %$ruleset) {
3809         my $rules = $ruleset->{$chain};
3810         my $sig = &$digest_fn($rules);
3811         my $oldsig;
3812
3813         $statushash->{$chain}->{sig} = $sig;
3814         if (defined($change_only_regex)) {
3815             $oldsig = $active_chains->{$chain}->{sig};
3816             $statushash->{$chain}->{rules} = $rules;
3817         } else {
3818             $oldsig = $active_chains->{$chain};
3819         }
3820         if (!defined($oldsig)) {
3821             $statushash->{$chain}->{action} = 'create';
3822         } else {
3823             if ($oldsig eq $sig) {
3824                 $statushash->{$chain}->{action} = 'exists';
3825             } else {
3826                 $statushash->{$chain}->{action} = 'update';
3827             }
3828         }
3829         if ($verbose) {
3830             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3831             foreach my $cmd (@{$rules}) {
3832                 print "\t$cmd\n";
3833             }
3834         }
3835     }
3836
3837     foreach my $chain (sort keys %$active_chains) {
3838         next if defined($ruleset->{$chain});
3839         my $action = 'delete';
3840         my $sig = $active_chains->{$chain};
3841         if (defined($change_only_regex)) {
3842             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
3843             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
3844             $sig = $sig->{sig};
3845         }
3846         $statushash->{$chain}->{action} = $action;
3847         $statushash->{$chain}->{sig} = $sig;
3848         print "$action $chain ($sig)\n" if $verbose;
3849     }
3850
3851     return $statushash;
3852 }
3853
3854 sub print_sig_rule {
3855     my ($chain, $sig) = @_;
3856
3857     # We just use this to store a SHA1 checksum used to detect changes
3858     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3859 }
3860
3861 sub get_ruleset_cmdlist {
3862     my ($ruleset, $verbose, $iptablescmd) = @_;
3863
3864     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3865
3866     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3867     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3868
3869     # create missing chains first
3870     foreach my $chain (sort keys %$ruleset) {
3871         my $stat = $statushash->{$chain};
3872         die "internal error" if !$stat;
3873         next if $stat->{action} ne 'create';
3874
3875         $cmdlist .= ":$chain - [0:0]\n";
3876     }
3877
3878     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3879         my $chain = "PVEFW-$h";
3880         if ($ruleset->{$chain} && !$hooks->{$h}) {
3881             $cmdlist .= "-A $h -j $chain\n";
3882         }
3883     }
3884
3885     foreach my $chain (sort keys %$ruleset) {
3886         my $stat = $statushash->{$chain};
3887         die "internal error" if !$stat;
3888
3889         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3890             $cmdlist .= "-F $chain\n";
3891             foreach my $cmd (@{$ruleset->{$chain}}) {
3892                 $cmdlist .= "$cmd\n";
3893             }
3894             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3895         } elsif ($stat->{action} eq 'delete') {
3896             die "internal error"; # this should not happen
3897         } elsif ($stat->{action} eq 'exists') {
3898             # do nothing
3899         } else {
3900             die "internal error - unknown status '$stat->{action}'";
3901         }
3902     }
3903
3904     foreach my $chain (keys %$statushash) {
3905         next if $statushash->{$chain}->{action} ne 'delete';
3906         $cmdlist .= "-F $chain\n";
3907     }
3908     foreach my $chain (keys %$statushash) {
3909         next if $statushash->{$chain}->{action} ne 'delete';
3910         next if $chain eq 'PVEFW-INPUT';
3911         next if $chain eq 'PVEFW-OUTPUT';
3912         next if $chain eq 'PVEFW-FORWARD';
3913         $cmdlist .= "-X $chain\n";
3914     }
3915
3916     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3917
3918     $cmdlist .= "COMMIT\n";
3919
3920     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3921 }
3922
3923 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
3924
3925 sub get_ebtables_cmdlist {
3926     my ($ruleset, $verbose) = @_;
3927
3928     my $changes = 0;
3929     my $cmdlist = "*filter\n";
3930
3931     my $active_chains = ebtables_get_chains();
3932     my $statushash = get_ruleset_status($ruleset, $active_chains,
3933                                         \&iptables_chain_digest, $verbose,
3934                                         $pve_ebtables_chainname_regex);
3935
3936     # create chains first and make sure PVE rules are evaluated if active
3937     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
3938     my $pve_include = 0;
3939     foreach my $chain (sort keys %$statushash) {
3940         next if ($statushash->{$chain}->{action} eq 'delete');
3941         $cmdlist .= ":$chain ACCEPT\n";
3942         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
3943     }
3944
3945     foreach my $chain (sort keys %$statushash) {
3946         my $stat = $statushash->{$chain};
3947         next if ($stat->{action} eq 'delete');
3948         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
3949
3950         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
3951             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
3952                 next if ! $pve_include;
3953                 $pve_include = 0;
3954             }
3955             $cmdlist .= "$cmd\n";
3956         }
3957     }
3958     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
3959
3960     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3961 }
3962
3963 sub get_ipset_cmdlist {
3964     my ($ruleset, $verbose) = @_;
3965
3966     my $cmdlist = "";
3967
3968     my $delete_cmdlist = "";
3969
3970     my $active_chains = ipset_get_chains();
3971     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3972
3973     # remove stale _swap chains
3974     foreach my $chain (keys %$active_chains) {
3975         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3976             $cmdlist .= "destroy $chain\n";
3977         }
3978     }
3979
3980     foreach my $chain (keys %$ruleset) {
3981         my $stat = $statushash->{$chain};
3982         die "internal error" if !$stat;
3983
3984         if ($stat->{action} eq 'create') {
3985             foreach my $cmd (@{$ruleset->{$chain}}) {
3986                 $cmdlist .= "$cmd\n";
3987             }
3988         }
3989     }
3990
3991     foreach my $chain (keys %$ruleset) {
3992         my $stat = $statushash->{$chain};
3993         die "internal error" if !$stat;
3994
3995         if ($stat->{action} eq 'update') {
3996             my $chain_swap = $chain."_swap";
3997
3998             foreach my $cmd (@{$ruleset->{$chain}}) {
3999                 $cmd =~ s/$chain/$chain_swap/;
4000                 $cmdlist .= "$cmd\n";
4001             }
4002             $cmdlist .= "swap $chain_swap $chain\n";
4003             $cmdlist .= "flush $chain_swap\n";
4004             $cmdlist .= "destroy $chain_swap\n";
4005         }
4006     }
4007
4008      # the remove unused chains
4009     foreach my $chain (keys %$statushash) {
4010         next if $statushash->{$chain}->{action} ne 'delete';
4011
4012         $delete_cmdlist .= "flush $chain\n";
4013         $delete_cmdlist .= "destroy $chain\n";
4014     }
4015
4016     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4017
4018     return ($cmdlist, $delete_cmdlist, $changes);
4019 }
4020
4021 sub apply_ruleset {
4022     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset, $verbose) = @_;
4023
4024     enable_bridge_firewall();
4025
4026     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4027         get_ipset_cmdlist($ipset_ruleset, $verbose);
4028
4029     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
4030     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
4031     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset, $verbose);
4032
4033     if ($verbose) {
4034         if ($ipset_changes) {
4035             print "ipset changes:\n";
4036             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4037             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4038         }
4039
4040         if ($changes) {
4041             print "iptables changes:\n";
4042             print $cmdlist;
4043         }
4044
4045         if ($changesv6) {
4046             print "ip6tables changes:\n";
4047             print $cmdlistv6;
4048         }
4049
4050         if ($ebtables_changes) {
4051             print "ebtables changes:\n";
4052             print $ebtables_cmdlist;
4053         }
4054     }
4055
4056     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4057     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4058
4059     ipset_restore_cmdlist($ipset_create_cmdlist);
4060
4061     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4062     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4063
4064     iptables_restore_cmdlist($cmdlist);
4065
4066     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4067     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4068
4069     ip6tables_restore_cmdlist($cmdlistv6);
4070
4071     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4072     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4073
4074     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4075
4076     ebtables_restore_cmdlist($ebtables_cmdlist);
4077
4078     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4079     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4080
4081     # test: re-read status and check if everything is up to date
4082     my $active_chains = iptables_get_chains();
4083     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
4084
4085     my $errors;
4086     foreach my $chain (sort keys %$ruleset) {
4087         my $stat = $statushash->{$chain};
4088         if ($stat->{action} ne 'exists') {
4089             warn "unable to update chain '$chain'\n";
4090             $errors = 1;
4091         }
4092     }
4093
4094     my $active_chainsv6 = iptables_get_chains("ip6tables");
4095     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
4096
4097     foreach my $chain (sort keys %$rulesetv6) {
4098         my $stat = $statushashv6->{$chain};
4099         if ($stat->{action} ne 'exists') {
4100             warn "unable to update chain '$chain'\n";
4101             $errors = 1;
4102         }
4103     }
4104
4105     my $active_ebtables_chains = ebtables_get_chains();
4106     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4107                                 $active_ebtables_chains, \&iptables_chain_digest,
4108                                 0, $pve_ebtables_chainname_regex);
4109
4110     foreach my $chain (sort keys %$ebtables_ruleset) {
4111         my $stat = $ebtables_statushash->{$chain};
4112         if ($stat->{action} ne 'exists') {
4113             warn "ebtables : unable to update chain '$chain'\n";
4114             $errors = 1;
4115         }
4116     }
4117
4118     die "unable to apply firewall changes\n" if $errors;
4119
4120     update_nf_conntrack_max($hostfw_conf);
4121
4122     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4123
4124     update_nf_conntrack_logging($hostfw_conf);
4125 }
4126
4127 sub update_nf_conntrack_max {
4128     my ($hostfw_conf) = @_;
4129
4130     my $max = 65536; # reasonable default
4131
4132     my $options = $hostfw_conf->{options} || {};
4133
4134     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4135         $max = $options->{nf_conntrack_max};
4136         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4137     }
4138
4139     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4140     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4141
4142     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4143
4144     if ($current != $max) {
4145         my $hashsize = int($max/4);
4146         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4147         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4148     }
4149 }
4150
4151 sub update_nf_conntrack_tcp_timeout_established {
4152     my ($hostfw_conf) = @_;
4153
4154     my $options = $hostfw_conf->{options} || {};
4155
4156     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4157
4158     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4159 }
4160
4161 my $log_nf_conntrack_enabled = undef;
4162 sub update_nf_conntrack_logging {
4163     my ($hostfw_conf) = @_;
4164
4165     my $options = $hostfw_conf->{options} || {};
4166     my $value = $options->{log_nf_conntrack} || 0;
4167     if (!defined($log_nf_conntrack_enabled)
4168         || $value != $log_nf_conntrack_enabled)
4169     {
4170         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4171         PVE::Tools::file_set_contents($tmpfile, $value);
4172
4173         PVE::Tools::run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4174         $log_nf_conntrack_enabled = $value;
4175     }
4176 }
4177
4178 sub remove_pvefw_chains {
4179
4180     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4181     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4182     PVE::Firewall::remove_pvefw_chains_ipset();
4183
4184 }
4185
4186 sub remove_pvefw_chains_iptables {
4187     my ($iptablescmd) = @_;
4188
4189     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
4190     my $cmdlist = "*filter\n";
4191
4192     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
4193         if ($hooks->{$h}) {
4194             $cmdlist .= "-D $h -j PVEFW-$h\n";
4195         }
4196     }
4197
4198     foreach my $chain (keys %$chash) {
4199         $cmdlist .= "-F $chain\n";
4200     }
4201
4202     foreach my $chain (keys %$chash) {
4203         $cmdlist .= "-X $chain\n";
4204     }
4205     $cmdlist .= "COMMIT\n";
4206
4207     if($iptablescmd eq "ip6tables") {
4208         ip6tables_restore_cmdlist($cmdlist);
4209     } else {
4210         iptables_restore_cmdlist($cmdlist);
4211     }
4212 }
4213
4214 sub remove_pvefw_chains_ipset {
4215
4216     my $ipset_chains = ipset_get_chains();
4217
4218     my $cmdlist = "";
4219
4220     foreach my $chain (keys %$ipset_chains) {
4221         $cmdlist .= "flush $chain\n";
4222         $cmdlist .= "destroy $chain\n";
4223     }
4224
4225     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4226 }
4227
4228 sub init {
4229     my $cluster_conf = load_clusterfw_conf();
4230     my $cluster_options = $cluster_conf->{options};
4231     my $enable = $cluster_options->{enable};
4232
4233     return if !$enable;
4234
4235     # load required modules here
4236 }
4237
4238 sub update {
4239     my $code = sub {
4240
4241         my $cluster_conf = load_clusterfw_conf();
4242         my $cluster_options = $cluster_conf->{options};
4243
4244         if (!$cluster_options->{enable}) {
4245             PVE::Firewall::remove_pvefw_chains();
4246             return;
4247         }
4248
4249         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4250
4251         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4252
4253         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4254     };
4255
4256     run_locked($code);
4257 }
4258
4259 1;