src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5
   6 use Digest::SHA;
   7 use Encode;
   8 use File::Basename;
   9 use File::Path;
  10 use IO::File;
  11 use Net::IP;
  12 use POSIX;
  13 use Socket qw(AF_INET AF_INET6 inet_ntop inet_pton);
  14 use Storable qw(dclone);
  15
  16 use PVE::Cluster;
  17 use PVE::Corosync;
  18 use PVE::Exception qw(raise raise_param_exc);
  19 use PVE::INotify;
  20 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  21 use PVE::Network;
  22 use PVE::ProcFSTools;
  23 use PVE::SafeSyslog;
  24 use PVE::Tools qw($IPV4RE $IPV6RE);
  25 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  26
  27 use PVE::Firewall::Helpers;
  28
  29 my $pvefw_conf_dir = "/etc/pve/firewall";
  30 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  31
  32 # dynamically include PVE::QemuServer and PVE::LXC
  33 # to avoid dependency problems
  34 my $have_qemu_server;
  35 eval {
  36     require PVE::QemuServer;
  37     require PVE::QemuConfig;
  38     $have_qemu_server = 1;
  39 };
  40
  41 my $have_lxc;
  42 eval {
  43     require PVE::LXC;
  44     $have_lxc = 1;
  45 };
  46
  47 my $pve_fw_status_dir = "/var/lib/pve-firewall";
  48
  49 mkdir $pve_fw_status_dir; # make sure this exists
  50
  51 my $security_group_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  52 my $ipset_name_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  53 our $ip_alias_pattern = '[A-Za-z][A-Za-z0-9\-\_]+';
  54
  55 my $max_alias_name_length = 64;
  56 my $max_ipset_name_length = 64;
  57 my $max_group_name_length = 18;
  58
  59 my $PROTOCOLS_WITH_PORTS = {
  60     udp => 1,     17 => 1,
  61     udplite => 1, 136 => 1,
  62     tcp => 1,     6 => 1,
  63     dccp => 1,    33 => 1,
  64     sctp => 1,    132 => 1,
  65 };
  66
  67 PVE::JSONSchema::register_format('IPorCIDR', \&pve_verify_ip_or_cidr);
  68 sub pve_verify_ip_or_cidr {
  69     my ($cidr, $noerr) = @_;
  70
  71     if ($cidr =~ m!^(?:$IPV6RE|$IPV4RE)(?:/\d+)?$!) {
  72         # Net::IP throws an error if the masked CIDR part isn't zero, e.g., `192.168.1.155/24`
  73         # fails but `192.168.1.0/24` succeeds. clean_cidr removes the non zero bits from the CIDR.
  74         my $clean_cidr = clean_cidr($cidr);
  75         return $cidr if Net::IP->new($clean_cidr);
  76         return undef if $noerr;
  77
  78         die Net::IP::Error() . "\n";
  79     }
  80     return undef if $noerr;
  81     die "value does not look like a valid IP address or CIDR network\n";
  82 }
  83
  84 PVE::JSONSchema::register_format('IPorCIDRorAlias', \&pve_verify_ip_or_cidr_or_alias);
  85 sub pve_verify_ip_or_cidr_or_alias {
  86     my ($cidr, $noerr) = @_;
  87
  88     return if $cidr =~ m/^(?:$ip_alias_pattern)$/;
  89
  90     return pve_verify_ip_or_cidr($cidr, $noerr);
  91 }
  92
  93 sub clean_cidr {
  94     my ($cidr) = @_;
  95     my ($ip, $len) = split('/', $cidr);
  96     return $cidr if !$len;
  97     my $ver = ($ip =~ m!^$IPV4RE$!) ? 4 : 6;
  98
  99     my $bin_ip = Net::IP::ip_iptobin( Net::IP::ip_expand_address($ip, $ver), $ver);
 100     my $bin_mask = Net::IP::ip_get_mask($len, $ver);
 101     my $clean_ip = Net::IP::ip_compress_address( Net::IP::ip_bintoip($bin_ip & $bin_mask, $ver), $ver);
 102
 103     return "${clean_ip}/$len";
 104 }
 105
 106 PVE::JSONSchema::register_standard_option('ipset-name', {
 107     description => "IP set name.",
 108     type => 'string',
 109     pattern => $ipset_name_pattern,
 110     minLength => 2,
 111     maxLength => $max_ipset_name_length,
 112 });
 113
 114 PVE::JSONSchema::register_standard_option('pve-fw-alias', {
 115     description => "Alias name.",
 116     type => 'string',
 117     pattern => $ip_alias_pattern,
 118     minLength => 2,
 119     maxLength => $max_alias_name_length,
 120 });
 121
 122 PVE::JSONSchema::register_standard_option('pve-fw-loglevel' => {
 123     description => "Log level.",
 124     type => 'string',
 125     enum => ['emerg', 'alert', 'crit', 'err', 'warning', 'notice', 'info', 'debug', 'nolog'],
 126     optional => 1,
 127 });
 128
 129 PVE::JSONSchema::register_standard_option('pve-security-group-name', {
 130     description => "Security Group name.",
 131     type => 'string',
 132     pattern => $security_group_name_pattern,
 133     minLength => 2,
 134     maxLength => $max_group_name_length,
 135 });
 136
 137 my $feature_ipset_nomatch = 0;
 138 eval  {
 139     my (undef, undef, $release) = POSIX::uname();
 140     if ($release =~ m/^(\d+)\.(\d+)\.\d+-/) {
 141         my ($major, $minor) = ($1, $2);
 142         $feature_ipset_nomatch = 1 if ($major > 3) ||
 143             ($major == 3 && $minor >= 7);
 144     }
 145
 146 };
 147
 148 my $nodename = PVE::INotify::nodename();
 149 my $hostfw_conf_filename = "/etc/pve/nodes/$nodename/host.fw";
 150
 151 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 152
 153 my $default_log_level = 'nolog'; # avoid logs by default
 154 my $global_log_ratelimit = '--limit 1/sec';
 155
 156 my $log_level_hash = {
 157     debug => 7,
 158     info => 6,
 159     notice => 5,
 160     warning => 4,
 161     err => 3,
 162     crit => 2,
 163     alert => 1,
 164     emerg => 0,
 165 };
 166
 167 my $verbose = 0;
 168 sub set_verbose {
 169     $verbose = shift;
 170 }
 171
 172 # %rule
 173 #
 174 # name => optional
 175 # enable => [0|1]
 176 # action =>
 177 # proto =>
 178 # sport => port[,port[,port]].. or port:port
 179 # dport => port[,port[,port]].. or port:port
 180 # log => optional, loglevel
 181 # logmsg => optional, logmsg - overwrites default
 182 # iface_in => incomin interface
 183 # iface_out => outgoing interface
 184 # match => optional, overwrites generation of match
 185 # target => optional, overwrites action
 186
 187 # we need to overwrite some macros for ipv6
 188 my $pve_ipv6fw_macros = {
 189     'Ping' => [
 190         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 191     ],
 192     'NeighborDiscovery' => [
 193         "IPv6 neighbor solicitation, neighbor and router advertisement",
 194         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 195         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 196         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 197         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 198     ],
 199     'DHCPv6' => [
 200         "DHCPv6 traffic",
 201         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 202     ],
 203     'Trcrt' => [
 204         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 205         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 206     ],
 207  };
 208
 209 # imported/converted from: /usr/share/shorewall/macro.*
 210 my $pve_fw_macros = {
 211     'Amanda' => [
 212         "Amanda Backup",
 213         { action => 'PARAM', proto => 'udp', dport => '10080' },
 214         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 215     ],
 216     'Auth' => [
 217         "Auth (identd) traffic",
 218         { action => 'PARAM', proto => 'tcp', dport => '113' },
 219     ],
 220     'BGP' => [
 221         "Border Gateway Protocol traffic",
 222         { action => 'PARAM', proto => 'tcp', dport => '179' },
 223     ],
 224     'BitTorrent' => [
 225         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 226         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 227         { action => 'PARAM', proto => 'udp', dport => '6881' },
 228     ],
 229     'BitTorrent32' => [
 230         "BitTorrent traffic for BitTorrent 3.2 and later",
 231         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 232         { action => 'PARAM', proto => 'udp', dport => '6881' },
 233     ],
 234     'Ceph' => [
 235         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Daemons)",
 236         # Legacy port for protocol v1
 237         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 238         # New port for protocol v2
 239         { action => 'PARAM', proto => 'tcp', dport => '3300' },
 240         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 241     ],
 242     'CVS' => [
 243         "Concurrent Versions System pserver traffic",
 244         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 245     ],
 246     'Citrix' => [
 247         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 248         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 249         { action => 'PARAM', proto => 'udp', dport => '1604' },
 250         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 251     ],
 252     'DAAP' => [
 253         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 254         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 255         { action => 'PARAM', proto => 'udp', dport => '3689' },
 256     ],
 257     'DCC' => [
 258         "Distributed Checksum Clearinghouse spam filtering mechanism",
 259         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 260     ],
 261     'DHCPfwd' => [
 262         "Forwarded DHCP traffic",
 263         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 264     ],
 265     'DNS' => [
 266         "Domain Name System traffic (upd and tcp)",
 267         { action => 'PARAM', proto => 'udp', dport => '53' },
 268         { action => 'PARAM', proto => 'tcp', dport => '53' },
 269     ],
 270     'Distcc' => [
 271         "Distributed Compiler service",
 272         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 273     ],
 274     'FTP' => [
 275         "File Transfer Protocol",
 276         { action => 'PARAM', proto => 'tcp', dport => '21' },
 277     ],
 278     'Finger' => [
 279         "Finger protocol (RFC 742)",
 280         { action => 'PARAM', proto => 'tcp', dport => '79' },
 281     ],
 282     'GNUnet' => [
 283         "GNUnet secure peer-to-peer networking traffic",
 284         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 285         { action => 'PARAM', proto => 'udp', dport => '2086' },
 286         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 287         { action => 'PARAM', proto => 'udp', dport => '1080' },
 288     ],
 289     'GRE' => [
 290         "Generic Routing Encapsulation tunneling protocol",
 291         { action => 'PARAM', proto => '47' },
 292     ],
 293     'Git' => [
 294         "Git distributed revision control traffic",
 295         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 296     ],
 297     'HKP' => [
 298         "OpenPGP HTTP key server protocol traffic",
 299         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 300     ],
 301     'HTTP' => [
 302         "Hypertext Transfer Protocol (WWW)",
 303         { action => 'PARAM', proto => 'tcp', dport => '80' },
 304     ],
 305     'HTTPS' => [
 306         "Hypertext Transfer Protocol (WWW) over SSL",
 307         { action => 'PARAM', proto => 'tcp', dport => '443' },
 308     ],
 309     'ICPV2' => [
 310         "Internet Cache Protocol V2 (Squid) traffic",
 311         { action => 'PARAM', proto => 'udp', dport => '3130' },
 312     ],
 313     'ICQ' => [
 314         "AOL Instant Messenger traffic",
 315         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 316     ],
 317     'IMAP' => [
 318         "Internet Message Access Protocol",
 319         { action => 'PARAM', proto => 'tcp', dport => '143' },
 320     ],
 321     'IMAPS' => [
 322         "Internet Message Access Protocol over SSL",
 323         { action => 'PARAM', proto => 'tcp', dport => '993' },
 324     ],
 325     'IPIP' => [
 326         "IPIP capsulation traffic",
 327         { action => 'PARAM', proto => '94' },
 328     ],
 329     'IPsec' => [
 330         "IPsec traffic",
 331         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 332         { action => 'PARAM', proto => '50' },
 333     ],
 334     'IPsecah' => [
 335         "IPsec authentication (AH) traffic",
 336         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 337         { action => 'PARAM', proto => '51' },
 338     ],
 339     'IPsecnat' => [
 340         "IPsec traffic and Nat-Traversal",
 341         { action => 'PARAM', proto => 'udp', dport => '500' },
 342         { action => 'PARAM', proto => 'udp', dport => '4500' },
 343         { action => 'PARAM', proto => '50' },
 344     ],
 345     'IRC' => [
 346         "Internet Relay Chat traffic",
 347         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 348     ],
 349     'Jetdirect' => [
 350         "HP Jetdirect printing",
 351         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 352     ],
 353     'L2TP' => [
 354         "Layer 2 Tunneling Protocol traffic",
 355         { action => 'PARAM', proto => 'udp', dport => '1701' },
 356     ],
 357     'LDAP' => [
 358         "Lightweight Directory Access Protocol traffic",
 359         { action => 'PARAM', proto => 'tcp', dport => '389' },
 360     ],
 361     'LDAPS' => [
 362         "Secure Lightweight Directory Access Protocol traffic",
 363         { action => 'PARAM', proto => 'tcp', dport => '636' },
 364     ],
 365     'MSNP' => [
 366         "Microsoft Notification Protocol",
 367         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 368     ],
 369     'MSSQL' => [
 370         "Microsoft SQL Server",
 371         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 372     ],
 373     'Mail' => [
 374         "Mail traffic (SMTP, SMTPS, Submission)",
 375         { action => 'PARAM', proto => 'tcp', dport => '25' },
 376         { action => 'PARAM', proto => 'tcp', dport => '465' },
 377         { action => 'PARAM', proto => 'tcp', dport => '587' },
 378     ],
 379     'MDNS' => [
 380         "Multicast DNS",
 381         { action => 'PARAM', proto => 'udp', dport => '5353' },
 382     ],
 383     'Munin' => [
 384         "Munin networked resource monitoring traffic",
 385         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 386     ],
 387     'MySQL' => [
 388         "MySQL server",
 389         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 390     ],
 391     'NNTP' => [
 392         "NNTP traffic (Usenet).",
 393         { action => 'PARAM', proto => 'tcp', dport => '119' },
 394     ],
 395     'NNTPS' => [
 396         "Encrypted NNTP traffic (Usenet)",
 397         { action => 'PARAM', proto => 'tcp', dport => '563' },
 398     ],
 399     'NTP' => [
 400         "Network Time Protocol (ntpd)",
 401         { action => 'PARAM', proto => 'udp', dport => '123' },
 402     ],
 403     'OSPF' => [
 404         "OSPF multicast traffic",
 405         { action => 'PARAM', proto => '89' },
 406     ],
 407     'OpenVPN' => [
 408         "OpenVPN traffic",
 409         { action => 'PARAM', proto => 'udp', dport => '1194' },
 410     ],
 411     'PCA' => [
 412         "Symantec PCAnywere (tm)",
 413         { action => 'PARAM', proto => 'udp', dport => '5632' },
 414         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 415     ],
 416     'PMG' => [
 417         "Proxmox Mail Gateway web interface",
 418         { action => 'PARAM', proto => 'tcp', dport => '8006' },
 419     ],
 420     'POP3' => [
 421         "POP3 traffic",
 422         { action => 'PARAM', proto => 'tcp', dport => '110' },
 423     ],
 424     'POP3S' => [
 425         "Encrypted POP3 traffic",
 426         { action => 'PARAM', proto => 'tcp', dport => '995' },
 427     ],
 428     'PPtP' => [
 429         "Point-to-Point Tunneling Protocol",
 430         { action => 'PARAM', proto => '47' },
 431         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 432     ],
 433     'Ping' => [
 434         "ICMP echo request",
 435         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 436     ],
 437     'PostgreSQL' => [
 438         "PostgreSQL server",
 439         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 440     ],
 441     'Printer' => [
 442         "Line Printer protocol printing",
 443         { action => 'PARAM', proto => 'tcp', dport => '515' },
 444     ],
 445     'RDP' => [
 446         "Microsoft Remote Desktop Protocol traffic",
 447         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 448     ],
 449     'RIP' => [
 450         "Routing Information Protocol (bidirectional)",
 451         { action => 'PARAM', proto => 'udp', dport => '520' },
 452     ],
 453     'RNDC' => [
 454         "BIND remote management protocol",
 455         { action => 'PARAM', proto => 'tcp', dport => '953' },
 456     ],
 457     'Razor' => [
 458         "Razor Antispam System",
 459         { action => 'PARAM', proto => 'tcp', dport => '2703' },
 460     ],
 461     'Rdate' => [
 462         "Remote time retrieval (rdate)",
 463         { action => 'PARAM', proto => 'tcp', dport => '37' },
 464     ],
 465     'Rsync' => [
 466         "Rsync server",
 467         { action => 'PARAM', proto => 'tcp', dport => '873' },
 468     ],
 469     'SANE' => [
 470         "SANE network scanning",
 471         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 472     ],
 473     'SMB' => [
 474         "Microsoft SMB traffic",
 475         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 476         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 477         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 478         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 479     ],
 480     'SMBswat' => [
 481         "Samba Web Administration Tool",
 482         { action => 'PARAM', proto => 'tcp', dport => '901' },
 483     ],
 484     'SMTP' => [
 485         "Simple Mail Transfer Protocol",
 486         { action => 'PARAM', proto => 'tcp', dport => '25' },
 487     ],
 488     'SMTPS' => [
 489         "Encrypted Simple Mail Transfer Protocol",
 490         { action => 'PARAM', proto => 'tcp', dport => '465' },
 491     ],
 492     'SNMP' => [
 493         "Simple Network Management Protocol",
 494         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 495         { action => 'PARAM', proto => 'tcp', dport => '161' },
 496     ],
 497     'SPAMD' => [
 498         "Spam Assassin SPAMD traffic",
 499         { action => 'PARAM', proto => 'tcp', dport => '783' },
 500     ],
 501     'SSH' => [
 502         "Secure shell traffic",
 503         { action => 'PARAM', proto => 'tcp', dport => '22' },
 504     ],
 505     'SVN' => [
 506         "Subversion server (svnserve)",
 507         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 508     ],
 509     'SixXS' => [
 510         "SixXS IPv6 Deployment and Tunnel Broker",
 511         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 512         { action => 'PARAM', proto => 'udp', dport => '3740' },
 513         { action => 'PARAM', proto => '41' },
 514         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 515     ],
 516     'SPICEproxy' => [
 517         "Proxmox VE SPICE display proxy traffic",
 518         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 519     ],
 520     'Squid' => [
 521         "Squid web proxy traffic",
 522         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 523     ],
 524     'Submission' => [
 525         "Mail message submission traffic",
 526         { action => 'PARAM', proto => 'tcp', dport => '587' },
 527     ],
 528     'Syslog' => [
 529         "Syslog protocol (RFC 5424) traffic",
 530         { action => 'PARAM', proto => 'udp', dport => '514' },
 531         { action => 'PARAM', proto => 'tcp', dport => '514' },
 532     ],
 533     'TFTP' => [
 534         "Trivial File Transfer Protocol traffic",
 535         { action => 'PARAM', proto => 'udp', dport => '69' },
 536     ],
 537     'Telnet' => [
 538         "Telnet traffic",
 539         { action => 'PARAM', proto => 'tcp', dport => '23' },
 540     ],
 541     'Telnets' => [
 542         "Telnet over SSL",
 543         { action => 'PARAM', proto => 'tcp', dport => '992' },
 544     ],
 545     'Time' => [
 546         "RFC 868 Time protocol",
 547         { action => 'PARAM', proto => 'tcp', dport => '37' },
 548     ],
 549     'Trcrt' => [
 550         "Traceroute (for up to 30 hops) traffic",
 551         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 552         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 553     ],
 554     'VNC' => [
 555         "VNC traffic for VNC display's 0 - 99",
 556         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 557     ],
 558     'VNCL' => [
 559         "VNC traffic from Vncservers to Vncviewers in listen mode",
 560         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 561     ],
 562     'Web' => [
 563         "WWW traffic (HTTP and HTTPS)",
 564         { action => 'PARAM', proto => 'tcp', dport => '80' },
 565         { action => 'PARAM', proto => 'tcp', dport => '443' },
 566     ],
 567     'Webcache' => [
 568         "Web Cache/Proxy traffic (port 8080)",
 569         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 570     ],
 571     'Webmin' => [
 572         "Webmin traffic",
 573         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 574     ],
 575     'Whois' => [
 576         "Whois (nicname, RFC 3912) traffic",
 577         { action => 'PARAM', proto => 'tcp', dport => '43' },
 578     ],
 579 };
 580
 581 my $pve_fw_helpers = {
 582     'amanda' => { proto => 'udp', dport => '10080', 'v4' => 1, 'v6' => 1 },
 583     'ftp' => { proto => 'tcp', dport => '21', 'v4' => 1, 'v6' => 1},
 584     'irc' => { proto => 'tcp', dport => '6667', 'v4' => 1 },
 585     'netbios-ns' => { proto => 'udp', dport => '137', 'v4' => 1 },
 586     'pptp' => { proto => 'tcp', dport => '1723', 'v4' => 1, },
 587     'sane' => { proto => 'tcp', dport => '6566', 'v4' => 1, 'v6' => 1 },
 588     'sip' => { proto => 'udp', dport => '5060', 'v4' => 1, 'v6' => 1 },
 589     'snmp' => { proto => 'udp', dport => '161', 'v4' => 1 },
 590     'tftp' => { proto => 'udp', dport => '69', 'v4' => 1, 'v6' => 1},
 591 };
 592
 593 my $pve_fw_parsed_macros;
 594 my $pve_fw_macro_descr;
 595 my $pve_fw_macro_ipversion = {};
 596 my $pve_fw_preferred_macro_names = {};
 597
 598 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 599 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 600
 601 my $pve_std_chains = {};
 602 my $pve_std_chains_conf = {};
 603 $pve_std_chains_conf->{4} = {
 604     'PVEFW-SET-ACCEPT-MARK' => [
 605         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 606     ],
 607     'PVEFW-DropBroadcast' => [
 608         # same as shorewall 'Broadcast'
 609         # simply DROP BROADCAST/MULTICAST/ANYCAST
 610         # we can use this to reduce logging
 611         { action => 'DROP', dsttype => 'BROADCAST' },
 612         { action => 'DROP', dsttype => 'MULTICAST' },
 613         { action => 'DROP', dsttype => 'ANYCAST' },
 614         { action => 'DROP', dest => '224.0.0.0/4' },
 615     ],
 616     'PVEFW-reject' => [
 617         # same as shorewall 'reject'
 618         { action => 'DROP', dsttype => 'BROADCAST' },
 619         { action => 'DROP', source => '224.0.0.0/4' },
 620         { action => 'DROP', proto => 'icmp' },
 621         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 622         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 623         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 624         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 625     ],
 626     'PVEFW-Drop' => [
 627         # same as shorewall 'Drop', which is equal to DROP,
 628         # but REJECT/DROP some packages to reduce logging,
 629         # and ACCEPT critical ICMP types
 630         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 631         { action => 'PVEFW-DropBroadcast' },
 632         # ACCEPT critical ICMP types
 633         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 634         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 635         # Drop packets with INVALID state
 636         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 637         # Drop Microsoft SMB noise
 638         { action => 'DROP', proto => 'udp', dport => '135,445' },
 639         { action => 'DROP', proto => 'udp', dport => '137:139' },
 640         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 641         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 642         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 643         # Drop new/NotSyn traffic so that it doesn't get logged
 644         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 645         # Drop DNS replies
 646         { action => 'DROP', proto => 'udp', sport => 53 },
 647     ],
 648     'PVEFW-Reject' => [
 649         # same as shorewall 'Reject', which is equal to Reject,
 650         # but REJECT/DROP some packages to reduce logging,
 651         # and ACCEPT critical ICMP types
 652         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 653         { action => 'PVEFW-DropBroadcast' },
 654         # ACCEPT critical ICMP types
 655         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 656         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 657         # Drop packets with INVALID state
 658         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 659         # Drop Microsoft SMB noise
 660         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 661         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 662         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 663         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 664         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 665         # Drop new/NotSyn traffic so that it doesn't get logged
 666         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 667         # Drop DNS replies
 668         { action => 'DROP', proto => 'udp', sport => 53 },
 669     ],
 670     'PVEFW-tcpflags' => [
 671         # same as shorewall tcpflags action.
 672         # Packets arriving on this interface are checked for some illegal combinations of TCP flags
 673         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 674         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 675         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 676         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 677         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 678     ],
 679     'PVEFW-smurfs' => [
 680         # same as shorewall smurfs action
 681         # Filter packets for smurfs (packets with a broadcast address as the source).
 682         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 683         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 684         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 685     ],
 686     'PVEFW-smurflog' => [
 687         { action => 'DROP', logmsg => 'DROP: ' },
 688     ],
 689     'PVEFW-logflags' => [
 690         { action => 'DROP', logmsg => 'DROP: ' },
 691     ],
 692 };
 693
 694 $pve_std_chains_conf->{6} = {
 695     'PVEFW-SET-ACCEPT-MARK' => [
 696         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 697     ],
 698     'PVEFW-DropBroadcast' => [
 699         # same as shorewall 'Broadcast'
 700         # simply DROP BROADCAST/MULTICAST/ANYCAST
 701         # we can use this to reduce logging
 702         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 703         # ipv6 addrtype does not work with kernel 2.6.32
 704         #{ action => 'DROP', dsttype => 'MULTICAST' },
 705         #{ action => 'DROP', dsttype => 'ANYCAST' },
 706         { action => 'DROP', dest => 'ff00::/8' },
 707         #{ action => 'DROP', dest => '224.0.0.0/4' },
 708     ],
 709     'PVEFW-reject' => [
 710         { action => 'DROP', proto => 'icmpv6' },
 711         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 712         { match => '-p udp', target => '-j REJECT --reject-with icmp6-port-unreachable' },
 713         { target => '-j REJECT --reject-with icmp6-adm-prohibited' },
 714     ],
 715     'PVEFW-Drop' => [
 716         # same as shorewall 'Drop', which is equal to DROP,
 717         # but REJECT/DROP some packages to reduce logging,
 718         # and ACCEPT critical ICMP types
 719         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 720         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 721         { action => 'PVEFW-DropBroadcast' },
 722         # ACCEPT critical ICMP types
 723         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 724         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 725         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 726         # Drop packets with INVALID state
 727         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 728         # Drop Microsoft SMB noise
 729         { action => 'DROP', proto => 'udp', dport => '135,445' },
 730         { action => 'DROP', proto => 'udp', dport => '137:139'},
 731         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 732         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 733         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 734         # Drop new/NotSyn traffic so that it doesn't get logged
 735         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 736         # Drop DNS replies
 737         { action => 'DROP', proto => 'udp', sport => 53 },
 738     ],
 739     'PVEFW-Reject' => [
 740         # same as shorewall 'Reject', which is equal to Reject,
 741         # but REJECT/DROP some packages to reduce logging,
 742         # and ACCEPT critical ICMP types
 743         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 744         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 745         { action => 'PVEFW-DropBroadcast' },
 746         # ACCEPT critical ICMP types
 747         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 748         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 749         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 750         # Drop packets with INVALID state
 751         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 752         # Drop Microsoft SMB noise
 753         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 754         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 755         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 756         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 757         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 758         # Drop new/NotSyn traffic so that it doesn't get logged
 759         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 760         # Drop DNS replies
 761         { action => 'DROP', proto => 'udp', sport => 53 },
 762     ],
 763     'PVEFW-tcpflags' => [
 764         # same as shorewall tcpflags action.
 765         # Packets arriving on this interface are checked for some illegal combinations of TCP flags
 766         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 767         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 768         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 769         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 770         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 771     ],
 772     'PVEFW-logflags' => [
 773         { action => 'DROP', logmsg => 'DROP: ' },
 774     ],
 775 };
 776
 777 # iptables -p icmp -h
 778 my $icmp_type_names = {
 779     any => 1,
 780     'echo-reply' => 1,
 781     'destination-unreachable' => 1,
 782     'network-unreachable' => 1,
 783     'host-unreachable' => 1,
 784     'protocol-unreachable' => 1,
 785     'port-unreachable' => 1,
 786     'fragmentation-needed' => 1,
 787     'source-route-failed' => 1,
 788     'network-unknown' => 1,
 789     'host-unknown' => 1,
 790     'network-prohibited' => 1,
 791     'host-prohibited' => 1,
 792     'TOS-network-unreachable' => 1,
 793     'TOS-host-unreachable' => 1,
 794     'communication-prohibited' => 1,
 795     'host-precedence-violation' => 1,
 796     'precedence-cutoff' => 1,
 797     'source-quench' => 1,
 798     'redirect' => 1,
 799     'network-redirect' => 1,
 800     'host-redirect' => 1,
 801     'TOS-network-redirect' => 1,
 802     'TOS-host-redirect' => 1,
 803     'echo-request' => 1,
 804     'router-advertisement' => 1,
 805     'router-solicitation' => 1,
 806     'time-exceeded' => 1,
 807     'ttl-zero-during-transit' => 1,
 808     'ttl-zero-during-reassembly' => 1,
 809     'parameter-problem' => 1,
 810     'ip-header-bad' => 1,
 811     'required-option-missing' => 1,
 812     'timestamp-request' => 1,
 813     'timestamp-reply' => 1,
 814     'address-mask-request' => 1,
 815     'address-mask-reply' => 1,
 816 };
 817
 818 # ip6tables -p icmpv6 -h
 819
 820 my $icmpv6_type_names = {
 821     'destination-unreachable' => 1,
 822     'no-route' => 1,
 823     'communication-prohibited' => 1,
 824     'beyond-scope' => 1,
 825     'address-unreachable' => 1,
 826     'port-unreachable' => 1,
 827     'failed-policy' => 1,
 828     'reject-route' => 1,
 829     'packet-too-big' => 1,
 830     'time-exceeded' => 1,
 831     'ttl-zero-during-transit' => 1,
 832     'ttl-zero-during-reassembly' => 1,
 833     'parameter-problem' => 1,
 834     'bad-header' => 1,
 835     'unknown-header-type' => 1,
 836     'unknown-option' => 1,
 837     'echo-request' => 1,
 838     'echo-reply' => 1,
 839     'router-solicitation' => 1,
 840     'router-advertisement' => 1,
 841     'neighbor-solicitation' => 1,
 842     'neighbour-solicitation' => 1,
 843     'neighbor-advertisement' => 1,
 844     'neighbour-advertisement' => 1,
 845     'redirect' => 1,
 846 };
 847
 848 my $is_valid_icmp_type = sub {
 849     my ($type, $valid_types) = @_;
 850
 851     if ($type =~ m/^\d+$/) {
 852         # values for icmp-type range between 0 and 255 (8 bit field)
 853         die "invalid icmp-type '$type'\n" if $type > 255;
 854     } else {
 855         die "unknown icmp-type '$type'\n" if !defined($valid_types->{$type});
 856     }
 857 };
 858
 859 sub init_firewall_macros {
 860
 861     $pve_fw_parsed_macros = {};
 862
 863     my $parse = sub {
 864         my ($k, $macro) = @_;
 865         my $lc_name = lc($k);
 866         $pve_fw_macro_ipversion->{$k} = 0;
 867         while (!ref($macro->[0])) {
 868             my $desc = shift @$macro;
 869             if ($desc eq 'ipv4only') {
 870                 $pve_fw_macro_ipversion->{$k} = 4;
 871             } elsif ($desc eq 'ipv6only') {
 872                 $pve_fw_macro_ipversion->{$k} = 6;
 873             } else {
 874                 $pve_fw_macro_descr->{$k} = $desc;
 875             }
 876         }
 877         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 878         $pve_fw_parsed_macros->{$k} = $macro;
 879     };
 880
 881     foreach my $k (keys %$pve_fw_macros) {
 882         &$parse($k, $pve_fw_macros->{$k});
 883     }
 884
 885     foreach my $k (keys %$pve_ipv6fw_macros) {
 886         next if $pve_fw_parsed_macros->{$k};
 887         &$parse($k, $pve_ipv6fw_macros->{$k});
 888         $pve_fw_macro_ipversion->{$k} = 6;
 889     }
 890 }
 891
 892 init_firewall_macros();
 893
 894 sub get_macros {
 895     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 896 }
 897
 898 my $etc_services;
 899
 900 sub get_etc_services {
 901
 902     return $etc_services if $etc_services;
 903
 904     my $filename = "/etc/services";
 905
 906     my $fh = IO::File->new($filename, O_RDONLY);
 907     if (!$fh) {
 908         warn "unable to read '$filename' - $!\n";
 909         return {};
 910     }
 911
 912     my $services = {};
 913
 914     while (my $line = <$fh>) {
 915         chomp ($line);
 916         next if $line =~m/^#/;
 917         next if ($line =~m/^\s*$/);
 918
 919         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp|sctp).*$!) {
 920             $services->{byid}->{$2}->{name} = $1;
 921             $services->{byid}->{$2}->{port} = $2;
 922             $services->{byid}->{$2}->{$3} = 1;
 923             $services->{byname}->{$1} = $services->{byid}->{$2};
 924         }
 925     }
 926
 927     close($fh);
 928
 929     $etc_services = $services;
 930
 931
 932     return $etc_services;
 933 }
 934
 935 sub parse_protocol_file {
 936     my ($filename) = @_;
 937
 938     my $fh = IO::File->new($filename, O_RDONLY);
 939     if (!$fh) {
 940         warn "unable to read '$filename' - $!\n";
 941         return {};
 942     }
 943
 944     my $protocols = {};
 945
 946     while (my $line = <$fh>) {
 947         chomp ($line);
 948         next if $line =~m/^#/;
 949         next if ($line =~m/^\s*$/);
 950
 951         if ($line =~ m!^(\S+)\s+(\d+)(?:\s+.*)?$!) {
 952             $protocols->{byid}->{$2}->{name} = $1;
 953             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 954         }
 955     }
 956
 957     close($fh);
 958
 959     return $protocols;
 960 }
 961
 962 my $etc_protocols;
 963
 964 sub get_etc_protocols {
 965     return $etc_protocols if $etc_protocols;
 966
 967     my $protocols = parse_protocol_file('/etc/protocols');
 968
 969     # add special case for ICMP v6
 970     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 971     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 972
 973     $etc_protocols = $protocols;
 974
 975     return $etc_protocols;
 976 }
 977
 978 my $etc_ethertypes;
 979
 980 sub get_etc_ethertypes {
 981     $etc_ethertypes = parse_protocol_file('/etc/ethertypes')
 982         if !$etc_ethertypes;
 983     return $etc_ethertypes;
 984 }
 985
 986 my $__local_network;
 987
 988 sub local_network {
 989     my ($new_value) = @_;
 990
 991     $__local_network = $new_value if defined($new_value);
 992
 993     return $__local_network if defined($__local_network);
 994
 995     eval {
 996         my $nodename = PVE::INotify::nodename();
 997
 998         my $ip = PVE::Cluster::remote_node_ip($nodename);
 999
1000         my $testip = Net::IP->new($ip);
1001
1002         my $isv6 = $testip->version == 6;
1003         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
1004                            : PVE::ProcFSTools::read_proc_net_route();
1005         foreach my $entry (@$routes) {
1006             my $mask;
1007             if ($isv6) {
1008                 $mask = $entry->{prefix};
1009                 next if !$mask; # skip the default route...
1010             } else {
1011                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
1012                 next if !defined($mask);
1013             }
1014             my $cidr = "$entry->{dest}/$mask";
1015             my $testnet = Net::IP->new($cidr);
1016             my $overlap = $testnet->overlaps($testip);
1017             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
1018                 $overlap == $Net::IP::IP_IDENTICAL)
1019             {
1020                 $__local_network = $cidr;
1021                 return;
1022             }
1023         }
1024     };
1025     warn $@ if $@;
1026
1027     return $__local_network;
1028 }
1029
1030 # ipset names are limited to 31 characters,
1031 # and we use '-v4' or '-v6' to indicate IP versions,
1032 # and we use '_swap' suffix for atomic update,
1033 # for example PVEFW-${VMID}-${ipset_name}_swap
1034
1035 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
1036
1037 sub compute_ipset_chain_name {
1038     my ($vmid, $ipset_name, $ipversion) = @_;
1039
1040     $vmid = 0 if !defined($vmid);
1041
1042     my $id = "$vmid-${ipset_name}-v$ipversion";
1043
1044     if (length($id) > $max_iptables_ipset_name_length) {
1045         $id = PVE::Tools::fnv31a_hex($id);
1046     }
1047
1048     return "PVEFW-$id";
1049 }
1050
1051 sub compute_ipfilter_ipset_name {
1052     my ($iface) = @_;
1053
1054     return "ipfilter-$iface";
1055 }
1056
1057 sub parse_address_list {
1058     my ($str) = @_;
1059
1060     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
1061         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
1062         return;
1063     }
1064
1065     if ($str =~ m/^${ip_alias_pattern}$/) {
1066         die "alias name too long\n" if length($str) > $max_alias_name_length;
1067         return;
1068     }
1069
1070     my $count = 0;
1071     my $iprange = 0;
1072     my $ipversion;
1073
1074     my @elements = split(/,/, $str);
1075     die "extraneous commas in list\n" if $str ne join(',', @elements);
1076     foreach my $elem (@elements) {
1077         $count++;
1078         my $ip = Net::IP->new($elem);
1079         if (!$ip) {
1080             my $err = Net::IP::Error();
1081             die "invalid IP address: $err\n";
1082         }
1083         $iprange = 1 if $elem =~ m/-/;
1084
1085         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1086
1087         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1088             if $ipversion && ($new_ipversion != $ipversion);
1089
1090         $ipversion = $new_ipversion;
1091     }
1092
1093     die "you can't use a range in a list\n" if $iprange && $count > 1;
1094
1095     return $ipversion;
1096 }
1097
1098 sub parse_port_name_number_or_range {
1099     my ($str, $dport) = @_;
1100
1101     my $services = PVE::Firewall::get_etc_services();
1102     my $count = 0;
1103     my $icmp_port = 0;
1104
1105     my @elements = split(/,/, $str);
1106     die "extraneous commas in list\n" if $str ne join(',', @elements);
1107     foreach my $item (@elements) {
1108         if ($item =~ m/^([0-9]+):([0-9]+)$/) {
1109             $count += 2;
1110             my ($port1, $port2) = ($1, $2);
1111             die "invalid port '$port1'\n" if $port1 > 65535;
1112             die "invalid port '$port2'\n" if $port2 > 65535;
1113             die "backwards range '$port1:$port2' not allowed, did you mean '$port2:$port1'?\n" if $port1 > $port2;
1114         } elsif ($item =~ m/^([0-9]+)$/) {
1115             $count += 1;
1116             my $port = $1;
1117             die "invalid port '$port'\n" if $port > 65535;
1118         } else {
1119             if ($dport && $icmp_type_names->{$item}) {
1120                 $icmp_port = 1;
1121             } elsif ($dport && $icmpv6_type_names->{$item}) {
1122                 $icmp_port = 1;
1123             } else {
1124                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1125             }
1126         }
1127     }
1128
1129     die "ICMP ports not allowed in port range\n" if $icmp_port && $count > 0;
1130
1131     # I really don't like to use the word number here, but it's the only thing
1132     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1133     # one and not as 100...
1134     die "too many entries in port list (> 15 numbers)\n"
1135         if $count > 15;
1136
1137     return (scalar(@elements) > 1);
1138 }
1139
1140 PVE::JSONSchema::register_format('pve-fw-conntrack-helper', \&pve_fw_verify_conntrack_helper);
1141 sub pve_fw_verify_conntrack_helper {
1142    my ($list) = @_;
1143
1144    my @helpers = split(/,/, $list);
1145    die "extraneous commas in list\n" if $list ne join(',', @helpers);
1146    foreach my $helper (@helpers) {
1147         die "unknown helper $helper" if !$pve_fw_helpers->{$helper};
1148    }
1149
1150    return $list;
1151 }
1152
1153 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1154 sub pve_fw_verify_sport_spec {
1155    my ($portstr) = @_;
1156
1157    parse_port_name_number_or_range($portstr, 0);
1158
1159    return $portstr;
1160 }
1161
1162 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1163 sub pve_fw_verify_dport_spec {
1164    my ($portstr) = @_;
1165
1166    parse_port_name_number_or_range($portstr, 1);
1167
1168    return $portstr;
1169 }
1170
1171 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1172 sub pve_fw_verify_addr_spec {
1173    my ($list) = @_;
1174
1175    parse_address_list($list);
1176
1177    return $list;
1178 }
1179
1180 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1181 sub pve_fw_verify_protocol_spec {
1182    my ($proto) = @_;
1183
1184    my $protocols = get_etc_protocols();
1185
1186    die "unknown protocol '$proto'\n" if $proto &&
1187        !(defined($protocols->{byname}->{$proto}) ||
1188          defined($protocols->{byid}->{$proto}));
1189
1190    return $proto;
1191 }
1192
1193 PVE::JSONSchema::register_format('pve-fw-icmp-type-spec', \&pve_fw_verify_icmp_type_spec);
1194 sub pve_fw_verify_icmp_type_spec {
1195     my ($icmp_type) = @_;
1196
1197     if ($icmp_type_names->{$icmp_type} ||  $icmpv6_type_names->{$icmp_type}) {
1198         return $icmp_type;
1199     }
1200
1201     die "invalid icmp-type value '$icmp_type'\n" if $icmp_type ne '';
1202
1203     return $icmp_type;
1204 }
1205
1206
1207 # helper function for API
1208
1209 sub copy_opject_with_digest {
1210     my ($object) = @_;
1211
1212     my $sha = Digest::SHA->new('sha1');
1213
1214     my $res = {};
1215     foreach my $k (sort keys %$object) {
1216         my $v = $object->{$k};
1217         next if !defined($v);
1218         $res->{$k} = $v;
1219         $sha->add($k, ':', $v, "\n");
1220     }
1221
1222     my $digest = $sha->hexdigest;
1223
1224     $res->{digest} = $digest;
1225
1226     return wantarray ? ($res, $digest) : $res;
1227 }
1228
1229 sub copy_list_with_digest {
1230     my ($list) = @_;
1231
1232     my $sha = Digest::SHA->new('sha1');
1233
1234     my $res = [];
1235     foreach my $entry (@$list) {
1236         my $data = {};
1237         foreach my $k (sort keys %$entry) {
1238             my $v = $entry->{$k};
1239             next if !defined($v);
1240             $data->{$k} = $v;
1241             # Note: digest ignores refs ($rule->{errors})
1242             # since Digest::SHA expects a series of bytes,
1243             #  we have to encode the value here to prevent errors when
1244             #  using utf8 characters (eg. in comments)
1245             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1246         }
1247         push @$res, $data;
1248     }
1249
1250     my $digest = $sha->hexdigest;
1251
1252     foreach my $entry (@$res) {
1253         $entry->{digest} = $digest;
1254     }
1255
1256     return wantarray ? ($res, $digest) : $res;
1257 }
1258
1259 our $cluster_option_properties = {
1260     enable => {
1261         description => "Enable or disable the firewall cluster wide.",
1262         type => 'integer',
1263         minimum => 0,
1264         optional => 1,
1265     },
1266     ebtables => {
1267         description => "Enable ebtables rules cluster wide.",
1268         type => 'boolean',
1269         default => 1,
1270         optional => 1,
1271     },
1272     policy_in => {
1273         description => "Input policy.",
1274         type => 'string',
1275         optional => 1,
1276         enum => ['ACCEPT', 'REJECT', 'DROP'],
1277     },
1278     policy_out => {
1279         description => "Output policy.",
1280         type => 'string',
1281         optional => 1,
1282         enum => ['ACCEPT', 'REJECT', 'DROP'],
1283     },
1284     log_ratelimit => {
1285         description => "Log ratelimiting settings",
1286         type => 'string', format => {
1287             enable => {
1288                 default_key => 1,
1289                 description => 'Enable or disable log rate limiting',
1290                 type => 'boolean',
1291                 default => '1',
1292             },
1293             rate => {
1294                 type => 'string',
1295                 description => 'Frequency with which the burst bucket gets refilled',
1296                 optional => 1,
1297                 pattern => '[1-9][0-9]*\/(second|minute|hour|day)',
1298                 format_description => 'rate',
1299                 default => '1/second',
1300             },
1301             burst => {
1302                 type => 'integer',
1303                 minimum => 0,
1304                 optional => 1,
1305                 description => 'Initial burst of packages which will always get logged before the rate is applied',
1306                 default => 5,
1307             },
1308         },
1309         optional => 1,
1310     },
1311 };
1312
1313 our $host_option_properties = {
1314     enable => {
1315         description => "Enable host firewall rules.",
1316         type => 'boolean',
1317         optional => 1,
1318     },
1319     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1320         description => "Log level for incoming traffic." }),
1321     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1322         description => "Log level for outgoing traffic." }),
1323     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1324         description => "Log level for illegal tcp flags filter." }),
1325     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1326         description => "Log level for SMURFS filter." }),
1327     nosmurfs => {
1328         description => "Enable SMURFS filter.",
1329         type => 'boolean',
1330         optional => 1,
1331     },
1332     tcpflags => {
1333         description => "Filter illegal combinations of TCP flags.",
1334         type => 'boolean',
1335         default => 0,
1336         optional => 1,
1337     },
1338     nf_conntrack_max => {
1339         description => "Maximum number of tracked connections.",
1340         type => 'integer',
1341         optional => 1,
1342         default => 262144,
1343         minimum => 32768,
1344     },
1345     nf_conntrack_tcp_timeout_established => {
1346         description => "Conntrack established timeout.",
1347         type => 'integer',
1348         optional => 1,
1349         default => 432000,
1350         minimum => 7875,
1351     },
1352     nf_conntrack_tcp_timeout_syn_recv => {
1353         description => "Conntrack syn recv timeout.",
1354         type => 'integer',
1355         optional => 1,
1356         default => 60,
1357         minimum => 30,
1358         maximum => 60,
1359     },
1360     ndp => {
1361         description => "Enable NDP (Neighbor Discovery Protocol).",
1362         type => 'boolean',
1363         default => 0,
1364         optional => 1,
1365     },
1366     nf_conntrack_allow_invalid => {
1367         description => "Allow invalid packets on connection tracking.",
1368         type => 'boolean',
1369         default => 0,
1370         optional => 1,
1371     },
1372     nf_conntrack_helpers => {
1373         type => 'string', format => 'pve-fw-conntrack-helper',
1374         description => "Enable conntrack helpers for specific protocols. ".
1375             "Supported protocols: amanda, ftp, irc, netbios-ns, pptp, sane, sip, snmp, tftp",
1376         default => '',
1377         optional => 1,
1378     },
1379     protection_synflood => {
1380         description => "Enable synflood protection",
1381         type => 'boolean',
1382         default => 0,
1383         optional => 1,
1384     },
1385     protection_synflood_rate => {
1386         description => "Synflood protection rate syn/sec by ip src.",
1387         type => 'integer',
1388         optional => 1,
1389         default => 200,
1390     },
1391     protection_synflood_burst => {
1392         description => "Synflood protection rate burst by ip src.",
1393         type => 'integer',
1394         optional => 1,
1395         default => 1000,
1396     },
1397     log_nf_conntrack => {
1398         description => "Enable logging of conntrack information.",
1399         type => 'boolean',
1400         default => 0,
1401         optional => 1
1402     },
1403 };
1404
1405 our $vm_option_properties = {
1406     enable => {
1407         description => "Enable/disable firewall rules.",
1408         type => 'boolean',
1409         default => 0,
1410         optional => 1,
1411     },
1412     macfilter => {
1413         description => "Enable/disable MAC address filter.",
1414         type => 'boolean',
1415         default => 1,
1416         optional => 1,
1417     },
1418     dhcp => {
1419         description => "Enable DHCP.",
1420         type => 'boolean',
1421         default => 0,
1422         optional => 1,
1423     },
1424     ndp => {
1425         description => "Enable NDP (Neighbor Discovery Protocol).",
1426         type => 'boolean',
1427         default => 0,
1428         optional => 1,
1429     },
1430     radv => {
1431         description => "Allow sending Router Advertisement.",
1432         type => 'boolean',
1433         optional => 1,
1434     },
1435     ipfilter => {
1436         description => "Enable default IP filters. " .
1437            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1438            "for every interface. Such ipsets implicitly contain sane default " .
1439            "restrictions such as restricting IPv6 link local addresses to " .
1440            "the one derived from the interface's MAC address. For containers " .
1441            "the configured IP addresses will be implicitly added.",
1442         type => 'boolean',
1443         optional => 1,
1444     },
1445     policy_in => {
1446         description => "Input policy.",
1447         type => 'string',
1448         optional => 1,
1449         enum => ['ACCEPT', 'REJECT', 'DROP'],
1450     },
1451     policy_out => {
1452         description => "Output policy.",
1453         type => 'string',
1454         optional => 1,
1455         enum => ['ACCEPT', 'REJECT', 'DROP'],
1456     },
1457     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1458         description => "Log level for incoming traffic." }),
1459     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1460         description => "Log level for outgoing traffic." }),
1461
1462 };
1463
1464
1465 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.";
1466
1467 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.";
1468
1469 my $rule_properties = {
1470     pos => {
1471         description => "Update rule at position <pos>.",
1472         type => 'integer',
1473         minimum => 0,
1474         optional => 1,
1475     },
1476     digest => get_standard_option('pve-config-digest'),
1477     type => {
1478         description => "Rule type.",
1479         type => 'string',
1480         optional => 1,
1481         enum => ['in', 'out', 'group'],
1482     },
1483     action => {
1484         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1485         type => 'string',
1486         optional => 1,
1487         pattern => $security_group_name_pattern,
1488         maxLength => 20,
1489         minLength => 2,
1490     },
1491     macro => {
1492         description => "Use predefined standard macro.",
1493         type => 'string',
1494         optional => 1,
1495         maxLength => 128,
1496     },
1497     iface => get_standard_option('pve-iface', {
1498         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.",
1499         optional => 1
1500     }),
1501     source => {
1502         description => "Restrict packet source address. $addr_list_descr",
1503         type => 'string', format => 'pve-fw-addr-spec',
1504         optional => 1,
1505         maxLength => 512,
1506     },
1507     dest => {
1508         description => "Restrict packet destination address. $addr_list_descr",
1509         type => 'string', format => 'pve-fw-addr-spec',
1510         optional => 1,
1511         maxLength => 512,
1512     },
1513     proto => {
1514         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1515         type => 'string', format => 'pve-fw-protocol-spec',
1516         optional => 1,
1517     },
1518     enable => {
1519         description => "Flag to enable/disable a rule.",
1520         type => 'integer',
1521         minimum => 0,
1522         optional => 1,
1523     },
1524     log => get_standard_option('pve-fw-loglevel', {
1525         description => "Log level for firewall rule.",
1526     }),
1527     sport => {
1528         description => "Restrict TCP/UDP source port. $port_descr",
1529         type => 'string', format => 'pve-fw-sport-spec',
1530         optional => 1,
1531     },
1532     dport => {
1533         description => "Restrict TCP/UDP destination port. $port_descr",
1534         type => 'string', format => 'pve-fw-dport-spec',
1535         optional => 1,
1536     },
1537     comment => {
1538         description => "Descriptive comment.",
1539         type => 'string',
1540         optional => 1,
1541     },
1542     'icmp-type' => {
1543         description => "Specify icmp-type. Only valid if proto equals 'icmp'.",
1544         type => 'string', format => 'pve-fw-icmp-type-spec',
1545         optional => 1,
1546     },
1547 };
1548
1549 sub add_rule_properties {
1550     my ($properties) = @_;
1551
1552     foreach my $k (keys %$rule_properties) {
1553         my $h = $rule_properties->{$k};
1554         # copy data, so that we can modify later without side effects
1555         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1556     }
1557
1558     return $properties;
1559 }
1560
1561 sub delete_rule_properties {
1562     my ($rule, $delete_str) = @_;
1563
1564     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1565         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1566             if !defined($rule_properties->{$opt});
1567         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1568             if $opt eq 'type' || $opt eq 'action';
1569         delete $rule->{$opt};
1570     }
1571
1572     return $rule;
1573 }
1574
1575 my $apply_macro = sub {
1576     my ($macro_name, $param, $verify, $ipversion) = @_;
1577
1578     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1579     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1580
1581     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1582         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1583     }
1584
1585     # skip macros which are specific to another ipversion
1586     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1587         return if $ipversion != $required;
1588     }
1589
1590     my $rules = [];
1591
1592     foreach my $templ (@$macro_rules) {
1593         my $rule = {};
1594         my $param_used = {};
1595         foreach my $k (keys %$templ) {
1596             my $v = $templ->{$k};
1597             if ($v eq 'PARAM') {
1598                 $v = $param->{$k};
1599                 $param_used->{$k} = 1;
1600             } elsif ($v eq 'DEST') {
1601                 $v = $param->{dest};
1602                 $param_used->{dest} = 1;
1603             } elsif ($v eq 'SOURCE') {
1604                 $v = $param->{source};
1605                 $param_used->{source} = 1;
1606             }
1607
1608             if (!defined($v)) {
1609                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1610                 raise_param_exc({ macro => $msg }) if $verify;
1611                 die "$msg\n";
1612             }
1613             $rule->{$k} = $v;
1614         }
1615         foreach my $k (keys %$param) {
1616             next if $k eq 'macro';
1617             next if !defined($param->{$k});
1618             next if $param_used->{$k};
1619             if (defined($rule->{$k})) {
1620                 if ($rule->{$k} ne $param->{$k}) {
1621                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1622                     raise_param_exc({ $k => $msg }) if $verify;
1623                     die "$msg\n";
1624                 }
1625             } else {
1626                 $rule->{$k} = $param->{$k};
1627             }
1628         }
1629         push @$rules, $rule;
1630     }
1631
1632     return $rules;
1633 };
1634
1635 my $rule_env_iface_lookup = {
1636     'ct' => 1,
1637     'vm' => 1,
1638     'group' => 0,
1639     'cluster' => 1,
1640     'host' => 1,
1641 };
1642
1643 sub verify_rule {
1644     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1645
1646     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1647
1648     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1649     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1650
1651     my $errors = $rule->{errors} || {};
1652
1653     my $error_count = 0;
1654
1655     my $add_error = sub {
1656         my ($param, $msg)  = @_;
1657         chomp $msg;
1658         raise_param_exc({ $param => $msg }) if !$noerr;
1659         $error_count++;
1660         $errors->{$param} = $msg if !$errors->{$param};
1661     };
1662
1663     my $ipversion;
1664     my $set_ip_version = sub {
1665         my $vers = shift;
1666         if ($vers) {
1667             die "detected mixed ipv4/ipv6 addresses in rule\n"
1668                 if $ipversion && ($vers != $ipversion);
1669             $ipversion = $vers;
1670         }
1671     };
1672
1673     my $check_ipset_or_alias_property = sub {
1674         my ($name, $expected_ipversion) = @_;
1675
1676         if (my $value = $rule->{$name}) {
1677             if ($value =~ m/^\+/) {
1678                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1679                     &$add_error($name, "no such ipset '$1'")
1680                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1681
1682                 } else {
1683                     &$add_error($name, "invalid ipset name '$value'");
1684                 }
1685             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1686                 my $alias = lc($value);
1687                 &$add_error($name, "no such alias '$value'")
1688                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1689                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1690                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1691
1692                 &$set_ip_version($e->{ipversion});
1693             }
1694         }
1695     };
1696
1697     my $type = $rule->{type};
1698     my $action = $rule->{action};
1699
1700     &$add_error('type', "missing property") if !$type;
1701     &$add_error('action', "missing property") if !$action;
1702
1703     if ($type) {
1704         if ($type eq  'in' || $type eq 'out') {
1705             &$add_error('action', "unknown action '$action'")
1706                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1707         } elsif ($type eq 'group') {
1708             &$add_error('type', "security groups not allowed")
1709                 if !$allow_groups;
1710             &$add_error('action', "invalid characters in security group name")
1711                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1712         } else {
1713             &$add_error('type', "unknown rule type '$type'");
1714         }
1715     }
1716
1717     if ($rule->{iface}) {
1718         &$add_error('type', "parameter -i not allowed for this rule type")
1719             if !$allow_iface;
1720         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1721         &$add_error('iface', $@) if $@;
1722         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1723             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1724                 if $rule->{iface} !~  m/^net(\d+)$/;
1725         }
1726     }
1727
1728     if ($rule->{macro}) {
1729         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1730             $rule->{macro} = $preferred_name;
1731         } else {
1732             &$add_error('macro', "unknown macro '$rule->{macro}'");
1733         }
1734     }
1735
1736     if ($rule->{proto}) {
1737         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1738         &$add_error('proto', $@) if $@;
1739         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1740         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1741         &$set_ip_version(6) if $rule->{proto} eq 'ipv6-icmp';
1742     }
1743
1744     if ($rule->{dport}) {
1745         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1746         &$add_error('dport', $@) if $@;
1747         my $proto = $rule->{proto};
1748         &$add_error('proto', "missing property - 'dport' requires this property")
1749             if !$proto;
1750         &$add_error('dport', "protocol '$proto' does not support ports")
1751             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1752                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1753     }
1754
1755     if (my $icmp_type = $rule ->{'icmp-type'}) {
1756         my $proto = $rule->{proto};
1757         &$add_error('proto', "missing property - 'icmp-type' requires this property")
1758             if $proto ne 'icmp' && $proto ne 'icmpv6' && $proto ne 'ipv6-icmp';
1759         &$add_error('icmp-type', "'icmp-type' cannot be specified together with 'dport'")
1760             if $rule->{dport};
1761         if ($proto eq 'icmp' && !$icmp_type_names->{$icmp_type}) {
1762             &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto 'icmp'");
1763         } elsif (($proto eq 'icmpv6' || $proto eq 'ipv6-icmp') && !$icmpv6_type_names->{$icmp_type}) {
1764             &$add_error('icmp-type', "invalid icmp-type '$icmp_type' for proto '$proto'");
1765         }
1766     }
1767
1768     if ($rule->{sport}) {
1769         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1770         &$add_error('sport', $@) if $@;
1771         my $proto = $rule->{proto};
1772         &$add_error('proto', "missing property - 'sport' requires this property")
1773             if !$proto;
1774         &$add_error('sport', "protocol '$proto' does not support ports")
1775             if !$PROTOCOLS_WITH_PORTS->{$proto};
1776     }
1777
1778     if ($rule->{source}) {
1779         eval {
1780             my $source_ipversion = parse_address_list($rule->{source});
1781             &$set_ip_version($source_ipversion);
1782         };
1783         &$add_error('source', $@) if $@;
1784         &$check_ipset_or_alias_property('source', $ipversion);
1785     }
1786
1787     if ($rule->{dest}) {
1788         eval {
1789             my $dest_ipversion = parse_address_list($rule->{dest});
1790             &$set_ip_version($dest_ipversion);
1791         };
1792         &$add_error('dest', $@) if $@;
1793         &$check_ipset_or_alias_property('dest', $ipversion);
1794     }
1795
1796     $rule->{ipversion} = $ipversion if $ipversion;
1797
1798     if ($rule->{macro} && !$error_count) {
1799         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1800         if (my $err = $@) {
1801             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1802                 my $eh = $err->{errors};
1803                 foreach my $p (keys %$eh) {
1804                     &$add_error($p, $eh->{$p});
1805                 }
1806             } else {
1807                 &$add_error('macro', "$err");
1808             }
1809         }
1810     }
1811
1812     $rule->{errors} = $errors if $error_count;
1813
1814     return $rule;
1815 }
1816
1817 sub copy_rule_data {
1818     my ($rule, $param) = @_;
1819
1820     foreach my $k (keys %$rule_properties) {
1821         if (defined(my $v = $param->{$k})) {
1822             if ($v eq '' || $v eq '-') {
1823                 delete $rule->{$k};
1824             } else {
1825                 $rule->{$k} = $v;
1826             }
1827         }
1828     }
1829
1830     return $rule;
1831 }
1832
1833 sub rules_modify_permissions {
1834     my ($rule_env) = @_;
1835
1836     if ($rule_env eq 'host') {
1837         return {
1838             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1839         };
1840     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1841         return {
1842             check => ['perm', '/', [ 'Sys.Modify' ]],
1843         };
1844     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1845         return {
1846             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1847         }
1848     }
1849
1850     return undef;
1851 }
1852
1853 sub rules_audit_permissions {
1854     my ($rule_env) = @_;
1855
1856     if ($rule_env eq 'host') {
1857         return {
1858             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1859         };
1860     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1861         return {
1862             check => ['perm', '/', [ 'Sys.Audit' ]],
1863         };
1864     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1865         return {
1866             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1867         }
1868     }
1869
1870     return undef;
1871 }
1872
1873 # core functions
1874
1875 sub enable_bridge_firewall {
1876
1877
1878     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1879     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1880
1881     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1882     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1883
1884 }
1885
1886 sub iptables_restore_cmdlist {
1887     my ($cmdlist, $table) = @_;
1888
1889     $table = 'filter' if !$table;
1890     run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1891 }
1892
1893 sub ip6tables_restore_cmdlist {
1894     my ($cmdlist, $table) = @_;
1895
1896     $table = 'filter' if !$table;
1897     run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1898 }
1899
1900 sub ipset_restore_cmdlist {
1901     my ($cmdlist) = @_;
1902
1903     run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1904 }
1905
1906 sub ebtables_restore_cmdlist {
1907     my ($cmdlist) = @_;
1908
1909     run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1910 }
1911
1912 sub iptables_get_chains {
1913     my ($iptablescmd, $t) = @_;
1914
1915     $iptablescmd = "iptables" if !$iptablescmd;
1916     $t = 'filter' if !$t;
1917
1918     my $res = {};
1919
1920     # check what chains we want to track
1921     my $is_pvefw_chain = sub {
1922         my $name = shift;
1923
1924         return 1 if $name =~ m/^PVEFW-\S+$/;
1925
1926         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1927
1928         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1929
1930         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1931         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1932
1933         return undef;
1934     };
1935
1936     my $table = '';
1937
1938     my $hooks = {};
1939
1940     my $parser = sub {
1941         my $line = shift;
1942
1943         return if $line =~ m/^#/;
1944         return if $line =~ m/^\s*$/;
1945
1946         if ($line =~ m/^\*(\S+)$/) {
1947             $table = $1;
1948             return;
1949         }
1950
1951         return if $table ne $t;
1952
1953         if ($line =~ m/^:(\S+)\s/) {
1954             my $chain = $1;
1955             return if !&$is_pvefw_chain($chain);
1956             $res->{$chain} = "unknown";
1957         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1958             my ($chain, $sig) = ($1, $2);
1959             return if !&$is_pvefw_chain($chain);
1960             $res->{$chain} = $sig;
1961         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1962             $hooks->{$1} = 1;
1963         } else {
1964             # simply ignore the rest
1965             return;
1966         }
1967     };
1968
1969     run_command(["$iptablescmd-save"], outfunc => $parser);
1970
1971     return wantarray ? ($res, $hooks) : $res;
1972 }
1973
1974 sub iptables_chain_digest {
1975     my ($rules) = @_;
1976     my $digest = Digest::SHA->new('sha1');
1977     foreach my $rule (@$rules) { # order is important
1978         $digest->add($rule);
1979     }
1980     return $digest->b64digest;
1981 }
1982
1983 sub ipset_chain_digest {
1984     my ($rules) = @_;
1985
1986     my $digest = Digest::SHA->new('sha1');
1987     foreach my $rule (sort @$rules) { # note: sorted
1988         $digest->add($rule);
1989     }
1990     return $digest->b64digest;
1991 }
1992
1993 sub ipset_get_chains {
1994
1995     my $res = {};
1996     my $chains = {};
1997
1998     my $parser = sub {
1999         my $line = shift;
2000
2001         return if $line =~ m/^#/;
2002         return if $line =~ m/^\s*$/;
2003         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
2004             my $chain = $1;
2005             # ignore initval from ipset v7.7+, won't set that yet so it'd mess up change detection
2006             $line =~ s/\binitval 0x[0-9a-f]+//;
2007             $line =~ s/\s+$//; # delete trailing white space
2008             push @{$chains->{$chain}}, $line;
2009         } else {
2010             # simply ignore the rest
2011             return;
2012         }
2013     };
2014
2015     run_command(['ipset', 'save'], outfunc => $parser);
2016
2017     # compute digest for each chain
2018     foreach my $chain (keys %$chains) {
2019         $res->{$chain} = ipset_chain_digest($chains->{$chain});
2020     }
2021
2022     return $res;
2023 }
2024
2025 sub ebtables_get_chains {
2026
2027     my $res = {};
2028     my $chains = {};
2029     my $table;
2030     my $parser = sub {
2031         my $line = shift;
2032         return if $line =~ m/^#/;
2033         return if $line =~ m/^\s*$/;
2034         if ($line =~ m/^\*(\S+)$/) {
2035             $table = $1;
2036             return;
2037         }
2038
2039         return if $table ne "filter";
2040
2041         if ($line =~ m/^:(\S+)\s(ACCEPT|DROP|RETURN)$/) {
2042             # Make sure we know chains exist even if they're empty.
2043             $chains->{$1} //= [];
2044             $res->{$1}->{policy} = $2;
2045         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
2046             my $chain = $1;
2047             $line =~ s/\s+$//;
2048             push @{$chains->{$chain}}, $line;
2049         } else {
2050             # simply ignore the rest
2051             return;
2052         }
2053     };
2054
2055     run_command(['ebtables-save'], outfunc => $parser);
2056     # compute digest for each chain and store rules as well
2057     foreach my $chain (keys %$chains) {
2058         $res->{$chain}->{rules} = $chains->{$chain};
2059         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
2060     }
2061     return $res;
2062 }
2063
2064 # substitute action of rule according to action hash
2065 sub rule_substitude_action {
2066     my ($rule, $actions) = @_;
2067
2068     if (my $action = $rule->{action}) {
2069         $rule->{action} = $actions->{$action} if defined($actions->{$action});
2070     }
2071 }
2072
2073 # generate a src or dst match
2074 # $dir(ection) is either d or s
2075 sub ipt_gen_src_or_dst_match {
2076     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
2077
2078     my $srcdst;
2079     if ($dir eq 's') {
2080         $srcdst = "src";
2081     } elsif ($dir eq 'd') {
2082         $srcdst = "dst";
2083     } else {
2084         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
2085     }
2086
2087     my $match;
2088     if ($adr =~ m/^\+/) {
2089         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
2090             my $name = $1;
2091             my $ipset_chain;
2092             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
2093                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
2094             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
2095                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
2096             } else {
2097                 die "no such ipset '$name'\n";
2098             }
2099             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2100         } else {
2101             die "invalid security group name '$adr'\n";
2102         }
2103     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2104         my $alias = lc($adr);
2105         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2106         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
2107         die "no such alias '$adr'\n" if !$e;
2108         $match = "-${dir} $e->{cidr}";
2109     } elsif ($adr =~ m/\-/){
2110         $match = "-m iprange --${srcdst}-range $adr";
2111     } else {
2112         $match = "-${dir} $adr";
2113     }
2114
2115     return $match;
2116 }
2117
2118 # convert a %rule to an array of iptables commands
2119 sub ipt_rule_to_cmds {
2120     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2121
2122     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2123
2124     my @match = ();
2125
2126     if (defined $rule->{match}) {
2127         push @match, $rule->{match};
2128     } else {
2129         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
2130         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
2131
2132         if ($rule->{source}) {
2133             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
2134         }
2135         if ($rule->{dest}) {
2136             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
2137         }
2138
2139         if (my $proto = $rule->{proto}) {
2140             push @match, "-p $proto";
2141
2142             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
2143             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
2144
2145             my $add_dport = sub {
2146                 return if !defined($rule->{dport});
2147
2148                 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2149                 if ($proto eq 'icmp') {
2150                     $is_valid_icmp_type->($rule->{dport}, $icmp_type_names);
2151                     push @match, "-m icmp --icmp-type $rule->{dport}";
2152                 } elsif ($proto eq 'icmpv6') {
2153                     $is_valid_icmp_type->($rule->{dport}, $icmpv6_type_names);
2154                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2155                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2156                     die "protocol $proto does not have ports\n";
2157                 } elsif ($multidport) {
2158                     push @match, "--match multiport", "--dports $rule->{dport}";
2159                 } else {
2160                     return if !$rule->{dport};
2161                     push @match, "--dport $rule->{dport}";
2162                 }
2163             };
2164
2165             my $add_sport = sub {
2166                 return if !$rule->{sport};
2167
2168                 die "protocol $proto does not have ports\n"
2169                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2170                 if ($multisport) {
2171                     push @match, "--match multiport", "--sports $rule->{sport}";
2172                 } else {
2173                     push @match, "--sport $rule->{sport}";
2174                 }
2175             };
2176
2177             my $add_icmp_type = sub {
2178                 return if !defined($rule->{'icmp-type'}) || $rule->{'icmp-type'} eq '';
2179
2180                 die "'icmp-type' can only be set if 'icmp', 'icmpv6' or 'ipv6-icmp' is specified\n"
2181                     if ($proto ne 'icmp') && ($proto ne 'icmpv6') && ($proto ne 'ipv6-icmp');
2182                 my $type = $proto eq 'icmp' ? 'icmp-type' : 'icmpv6-type';
2183
2184                 push @match, "-m $proto --$type $rule->{'icmp-type'}";
2185             };
2186
2187             # order matters - single port before multiport!
2188             $add_icmp_type->();
2189             $add_dport->() if $multisport;
2190             $add_sport->();
2191             $add_dport->() if !$multisport;
2192         } elsif ($rule->{dport} || $rule->{sport}) {
2193             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2194             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2195         }
2196
2197         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2198     }
2199     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2200
2201     my $targetstr;
2202     if (defined $rule->{target}) {
2203         $targetstr = $rule->{target};
2204     } else {
2205         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2206         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2207         $targetstr = ($goto) ? "-g $action" : "-j $action";
2208     }
2209
2210     my @iptcmds;
2211     my $log = $rule->{log};
2212     if (defined($log) && $log ne 'nolog') {
2213         my $loglevel = $log_level_hash->{$log};
2214         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2215         push @iptcmds, "-A $chain $matchstr $logaction";
2216     }
2217     push @iptcmds, "-A $chain $matchstr $targetstr";
2218     return @iptcmds;
2219 }
2220
2221 sub ruleset_generate_rule {
2222     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2223
2224     my $rules;
2225
2226     if ($rule->{macro}) {
2227         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2228     } else {
2229         $rules = [ $rule ];
2230     }
2231
2232     # update all or nothing
2233     my @ipt_rule_cmds;
2234     foreach my $r (@$rules) {
2235         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2236     }
2237     foreach my $c (@ipt_rule_cmds) {
2238         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2239     }
2240 }
2241
2242 sub ruleset_create_chain {
2243     my ($ruleset, $chain) = @_;
2244
2245     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2246     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2247
2248     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2249
2250     $ruleset->{$chain} = [];
2251 }
2252
2253 sub ruleset_chain_exist {
2254     my ($ruleset, $chain) = @_;
2255
2256     return $ruleset->{$chain} ? 1 : undef;
2257 }
2258
2259 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2260 sub ruleset_add_ipt_cmd {
2261    my ($ruleset, $chain, $iptcmd) = @_;
2262
2263    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2264
2265    push @{$ruleset->{$chain}}, $iptcmd;
2266 }
2267
2268 sub ruleset_addrule {
2269     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2270
2271     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2272
2273     if ($log) {
2274         my $loglevel = $log_level_hash->{$log};
2275         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2276         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2277     }
2278     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2279     $match .= ' ' if length($match);
2280     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2281 }
2282
2283 sub ruleset_insertrule {
2284    my ($ruleset, $chain, $match, $action, $log) = @_;
2285
2286    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2287
2288    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2289 }
2290
2291 sub get_log_rule_base {
2292     my ($chain, $vmid, $msg, $loglevel) = @_;
2293
2294     $vmid = 0 if !defined($vmid);
2295     $msg = "" if !defined($msg);
2296
2297     my $rlimit = '';
2298     if (defined($global_log_ratelimit)) {
2299         $rlimit = "-m limit $global_log_ratelimit ";
2300     }
2301
2302     # Note: we use special format for prefix to pass further
2303     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2304     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2305 }
2306
2307 sub ruleset_add_chain_policy {
2308     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2309
2310     if ($policy eq 'ACCEPT') {
2311
2312         my $rule = { action => 'ACCEPT' };
2313         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2314         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2315
2316     } elsif ($policy eq 'DROP') {
2317
2318         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2319
2320         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2321     } elsif ($policy eq 'REJECT') {
2322         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2323
2324         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2325     } else {
2326         # should not happen
2327         die "internal error: unknown policy '$policy'";
2328     }
2329 }
2330
2331 sub ruleset_chain_add_ndp {
2332     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2333     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2334
2335     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2336     if ($direction ne 'OUT' || $options->{radv}) {
2337         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2338     }
2339     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2340     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2341 }
2342
2343 sub ruleset_chain_add_conn_filters {
2344     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2345
2346     if (!$allow_invalid) {
2347         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2348     }
2349     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2350 }
2351
2352 sub ruleset_chain_add_input_filters {
2353     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2354
2355     if ($cluster_conf->{ipset}->{blacklist}){
2356         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2357             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2358             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2359         }
2360         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2361         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2362     }
2363
2364     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2365         if ($ipversion == 4) {
2366             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2367         }
2368     }
2369
2370     if ($options->{tcpflags}) {
2371         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2372     }
2373 }
2374
2375 sub ruleset_create_vm_chain {
2376     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2377
2378     ruleset_create_chain($ruleset, $chain);
2379     my $accept = generate_nfqueue($options);
2380
2381     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2382         if ($ipversion == 4) {
2383             if ($direction eq 'OUT') {
2384                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2385                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2386                                         proto => 'udp', sport => 68, dport => 67 });
2387             } else {
2388                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2389                                       { action => 'ACCEPT',
2390                                         proto => 'udp', sport => 67, dport => 68 });
2391             }
2392         } elsif ($ipversion == 6) {
2393             if ($direction eq 'OUT') {
2394                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2395                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2396                                         proto => 'udp', sport => 546, dport => 547 });
2397             } else {
2398                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2399                                       { action => 'ACCEPT',
2400                                         proto => 'udp', sport => 547, dport => 546 });
2401             }
2402         }
2403
2404     }
2405
2406     if ($direction eq 'OUT') {
2407         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2408             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2409         }
2410         if ($ipversion == 6 && !$options->{radv}) {
2411             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2412         }
2413         if ($ipfilter_ipset) {
2414             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2415         }
2416         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2417     }
2418
2419     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2420     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2421 }
2422
2423 sub ruleset_add_group_rule {
2424     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2425
2426     my $group = $rule->{action};
2427     my $group_chain = "GROUP-$group-$direction";
2428     if(!ruleset_chain_exist($ruleset, $group_chain)){
2429         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2430     }
2431
2432     if ($direction eq 'OUT' && $rule->{iface_out}) {
2433         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2434     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2435         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2436     } else {
2437         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2438     }
2439
2440     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2441 }
2442
2443 sub ruleset_generate_vm_rules {
2444     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2445
2446     my $lc_direction = lc($direction);
2447
2448     my $in_accept = generate_nfqueue($options);
2449
2450     foreach my $rule (@$rules) {
2451         next if $rule->{iface} && $rule->{iface} ne $netid;
2452         next if !$rule->{enable} || $rule->{errors};
2453         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2454
2455         if ($rule->{type} eq 'group') {
2456             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2457                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2458         } else {
2459             next if $rule->{type} ne $lc_direction;
2460             eval {
2461                 $rule->{logmsg} = "$rule->{action}: ";
2462                 if ($direction eq 'OUT') {
2463                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2464                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2465                 } else {
2466                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2467                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2468                 }
2469             };
2470             warn $@ if $@;
2471         }
2472     }
2473 }
2474
2475 sub generate_nfqueue {
2476     my ($options) = @_;
2477
2478     if ($options->{ips}) {
2479         my $action = "NFQUEUE";
2480         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2481             if (defined($3) && defined($1)) {
2482                 $action .= " --queue-balance $1:$3";
2483             } elsif (defined($1)) {
2484                 $action .= " --queue-num $1";
2485             }
2486         }
2487         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2488         return $action;
2489     } else {
2490         return "ACCEPT";
2491     }
2492 }
2493
2494 sub ruleset_generate_vm_ipsrules {
2495     my ($ruleset, $options, $direction, $iface) = @_;
2496
2497     if ($options->{ips} && $direction eq 'IN') {
2498         my $nfqueue = generate_nfqueue($options);
2499
2500         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2501             ruleset_create_chain($ruleset, "PVEFW-IPS");
2502         }
2503
2504         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2505     }
2506 }
2507
2508 sub generate_tap_rules_direction {
2509     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2510
2511     my $lc_direction = lc($direction);
2512
2513     my $rules = $vmfw_conf->{rules};
2514
2515     my $options = $vmfw_conf->{options};
2516     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2517
2518     my $tapchain = "$iface-$direction";
2519
2520     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2521     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2522         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2523
2524     if ($options->{enable}) {
2525         # create chain with mac and ip filter
2526         ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2527
2528         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2529
2530         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2531
2532         # implement policy
2533         my $policy;
2534
2535         if ($direction eq 'OUT') {
2536             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2537         } else {
2538             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2539         }
2540
2541         my $accept = generate_nfqueue($options);
2542         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2543         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2544     } else {
2545         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2546         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2547     }
2548
2549     # plug the tap chain to bridge chain
2550     if ($direction eq 'IN') {
2551         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2552                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2553     } else {
2554         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2555                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2556     }
2557 }
2558
2559 sub enable_host_firewall {
2560     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2561
2562     my $options = $hostfw_conf->{options};
2563     my $cluster_options = $cluster_conf->{options};
2564     my $rules = $hostfw_conf->{rules};
2565     my $cluster_rules = $cluster_conf->{rules};
2566
2567     # corosync preparation
2568     my $corosync_rule = "-p udp --dport 5404:5405";
2569     my $corosync_local_addresses = {};
2570     my $multicast_enabled;
2571     my $local_hostname = PVE::INotify::nodename();
2572     if (defined($corosync_conf)) {
2573         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2574             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2575
2576             if ($node_name eq $local_hostname) {
2577                 $corosync_local_addresses->{$key} = $node_ip;
2578             }
2579         });
2580
2581         # allow multicast only if enabled in config
2582         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2583         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2584     }
2585
2586     # host inbound firewall
2587     my $chain = "PVEFW-HOST-IN";
2588     ruleset_create_chain($ruleset, $chain);
2589
2590     my $loglevel = get_option_log_level($options, "log_level_in");
2591
2592     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2593
2594     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2595     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2596     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2597
2598     # we use RETURN because we need to check also tap rules
2599     my $accept_action = 'RETURN';
2600
2601     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2602
2603     # add host rules first, so that cluster wide rules can be overwritten
2604     foreach my $rule (@$rules, @$cluster_rules) {
2605         next if !$rule->{enable} || $rule->{errors};
2606         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2607
2608         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2609
2610         eval {
2611             $rule->{logmsg} = "$rule->{action}: ";
2612             if ($rule->{type} eq 'group') {
2613                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2614             } elsif ($rule->{type} eq 'in') {
2615                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2616                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2617             }
2618         };
2619         warn $@ if $@;
2620         delete $rule->{iface_in};
2621     }
2622
2623     # allow standard traffic for management ipset (includes cluster network)
2624     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2625     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2626     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2627     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2628     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2629     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2630     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action");  # Migration
2631
2632     # corosync inbound rules
2633     if (defined($corosync_conf)) {
2634         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2635             if $multicast_enabled;
2636
2637         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2638             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2639             my $destination = $corosync_local_addresses->{$key};
2640
2641             if ($node_name ne $local_hostname && defined($destination)) {
2642                 # accept only traffic on same ring
2643                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2644             }
2645         });
2646     }
2647
2648     # implement input policy
2649     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2650     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2651
2652     # host outbound firewall
2653     $chain = "PVEFW-HOST-OUT";
2654     ruleset_create_chain($ruleset, $chain);
2655
2656     $loglevel = get_option_log_level($options, "log_level_out");
2657
2658     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2659
2660     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2661
2662     # we use RETURN because we may want to check other thigs later
2663     $accept_action = 'RETURN';
2664     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2665
2666     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2667
2668     # add host rules first, so that cluster wide rules can be overwritten
2669     foreach my $rule (@$rules, @$cluster_rules) {
2670         next if !$rule->{enable} || $rule->{errors};
2671         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2672
2673         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2674         eval {
2675             $rule->{logmsg} = "$rule->{action}: ";
2676             if ($rule->{type} eq 'group') {
2677                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2678             } elsif ($rule->{type} eq 'out') {
2679                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2680                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2681             }
2682         };
2683         warn $@ if $@;
2684         delete $rule->{iface_out};
2685     }
2686
2687     # allow standard traffic on cluster network
2688     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2689     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2690
2691     if ($localnet && ($ipversion == $localnet_ver)) {
2692         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2693         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2694         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2695         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2696     }
2697
2698     # corosync outbound rules
2699     if (defined($corosync_conf)) {
2700         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2701             if $multicast_enabled;
2702
2703         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2704             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2705             my $source = $corosync_local_addresses->{$key};
2706
2707             if ($node_name ne $local_hostname && defined($source)) {
2708                 # accept only traffic on same ring
2709                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2710             }
2711         });
2712     }
2713
2714     # implement output policy
2715     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2716     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2717
2718     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2719     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2720 }
2721
2722 sub generate_group_rules {
2723     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2724
2725     my $rules = $cluster_conf->{groups}->{$group};
2726
2727     if (!$rules) {
2728         warn "no such security group '$group'\n";
2729         $rules = []; # create empty chain
2730     }
2731
2732     my $chain = "GROUP-${group}-IN";
2733
2734     ruleset_create_chain($ruleset, $chain);
2735     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2736
2737     foreach my $rule (@$rules) {
2738         next if $rule->{type} ne 'in';
2739         next if !$rule->{enable} || $rule->{errors};
2740         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2741         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2742         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2743     }
2744
2745     $chain = "GROUP-${group}-OUT";
2746
2747     ruleset_create_chain($ruleset, $chain);
2748     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2749
2750     foreach my $rule (@$rules) {
2751         next if $rule->{type} ne 'out';
2752         next if !$rule->{enable} || $rule->{errors};
2753         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2754         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2755         # check also other tap rules later
2756         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2757         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2758     }
2759 }
2760
2761 my $MAX_NETS = 32;
2762 my $valid_netdev_names = {};
2763 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2764     $valid_netdev_names->{"net$i"} = 1;
2765 }
2766
2767 sub get_mark_values {
2768     my ($value, $mask) = @_;
2769     $value = hex($value) if $value =~ /^0x/;
2770     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2771     $mask = 0xffffffff if !defined($mask);
2772     return ($value, $mask);
2773 }
2774
2775 sub parse_fw_rule {
2776     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2777
2778     my $orig_line = $line;
2779
2780     my $rule = {};
2781
2782     # we can add single line comments to the end of the rule
2783     if ($line =~ s/#\s*(.*?)\s*$//) {
2784         $rule->{comment} = decode('utf8', $1);
2785     }
2786
2787     # we can disable a rule when prefixed with '|'
2788
2789     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2790
2791     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2792         die "unable to parse rule: $line\n";
2793
2794     $rule->{type} = lc($1);
2795     $rule->{action} = $2;
2796
2797     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2798         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2799             $rule->{macro} = $1;
2800             $rule->{action} = $2;
2801         }
2802     }
2803
2804     while (length($line)) {
2805         if ($line =~ s/^-i (\S+)\s*//) {
2806             $rule->{iface} = $1;
2807             next;
2808         }
2809
2810         last if $rule->{type} eq 'group';
2811
2812         if ($line =~ s/^(?:-p|--?proto) (\S+)\s*//) {
2813             $rule->{proto} = $1;
2814             next;
2815         }
2816
2817         if ($line =~ s/^--?dport (\S+)\s*//) {
2818             $rule->{dport} = $1;
2819             next;
2820         }
2821
2822         if ($line =~ s/^--?sport (\S+)\s*//) {
2823             $rule->{sport} = $1;
2824             next;
2825         }
2826         if ($line =~ s/^--?source (\S+)\s*//) {
2827             $rule->{source} = $1;
2828             next;
2829         }
2830         if ($line =~ s/^--?dest (\S+)\s*//) {
2831             $rule->{dest} = $1;
2832             next;
2833         }
2834         if ($line =~ s/^--?log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2835             $rule->{log} = $1;
2836             next;
2837         }
2838         if ($line =~ s/^--?icmp-type (\S+)\s*//) {
2839             $rule->{'icmp-type'} = $1;
2840             next;
2841         }
2842
2843         last;
2844     }
2845
2846     die "unable to parse rule parameters: $line\n" if length($line);
2847
2848     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2849     if ($rule->{errors}) {
2850         # The verbose flag really means we're running from the CLI and want
2851         # output on the console - in the other case we really want such errors
2852         # to go into the syslog instead.
2853         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2854         $log->("$prefix - errors in rule parameters: $orig_line\n");
2855         foreach my $p (keys %{$rule->{errors}}) {
2856             $log->("  $p: $rule->{errors}->{$p}\n");
2857         }
2858     }
2859
2860     return $rule;
2861 }
2862
2863 sub verify_ethertype {
2864     my ($value) = @_;
2865     my $types = get_etc_ethertypes();
2866     die "unknown ethernet protocol type: $value\n"
2867         if !defined($types->{byname}->{$value}) &&
2868            !defined($types->{byid}->{$value});
2869 }
2870
2871 sub parse_vmfw_option {
2872     my ($line) = @_;
2873
2874     my ($opt, $value);
2875
2876     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2877
2878     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2879         $opt = lc($1);
2880         $value = int($2);
2881     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2882         $opt = lc($1);
2883         $value = $2 ? lc($3) : '';
2884     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2885         $opt = lc($1);
2886         $value = uc($3);
2887     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2888         $opt = lc($1);
2889         $value = $2;
2890     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2891         $opt = lc($1);
2892         $value = $2;
2893         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2894     } else {
2895         die "can't parse option '$line'\n"
2896     }
2897
2898     return ($opt, $value);
2899 }
2900
2901 sub parse_hostfw_option {
2902     my ($line) = @_;
2903
2904     my ($opt, $value);
2905
2906     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2907
2908     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2909         $opt = lc($1);
2910         $value = int($2);
2911     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2912         $opt = lc($1);
2913         $value = $2 ? lc($3) : '';
2914     } elsif ($line =~ m/^(nf_conntrack_helpers):\s*(((\S+)[,]?)+)\s*$/i) {
2915         $opt = lc($1);
2916         $value = lc($2);
2917         pve_fw_verify_conntrack_helper($value);
2918     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2919         $opt = lc($1);
2920         $value = int($2);
2921     } else {
2922         die "can't parse option '$line'\n"
2923     }
2924
2925     return ($opt, $value);
2926 }
2927
2928 sub parse_clusterfw_option {
2929     my ($line) = @_;
2930
2931     my ($opt, $value);
2932
2933     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2934         $opt = lc($1);
2935         $value = int($2);
2936         if (($value > 1) && ((time() - $value) > 60)) {
2937             $value = 0
2938         }
2939     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2940         $opt = lc($1);
2941         $value = int($2);
2942     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2943         $opt = lc($1);
2944         $value = uc($3);
2945     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2946         $opt = lc($1);
2947         $value = $2;
2948     } else {
2949         die "can't parse option '$line'\n"
2950     }
2951
2952     return ($opt, $value);
2953 }
2954
2955 sub resolve_alias {
2956     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2957
2958     my $alias = lc($cidr);
2959     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2960     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2961
2962     die "no such alias '$cidr'\n" if !$e;;
2963
2964     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2965 }
2966
2967 sub parse_ip_or_cidr {
2968     my ($cidr) = @_;
2969
2970     my $ipversion;
2971
2972     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2973         $cidr =~ s|/128$||;
2974         $ipversion = 6;
2975     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2976         $cidr =~ s|/32$||;
2977         $ipversion = 4;
2978     } else {
2979         die "value does not look like a valid IP address or CIDR network\n";
2980     }
2981
2982     return wantarray ? ($cidr, $ipversion) : $cidr;
2983 }
2984
2985 sub parse_alias {
2986     my ($line) = @_;
2987
2988     # we can add single line comments to the end of the line
2989     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2990
2991     if ($line =~ m/^(\S+)\s(\S+)$/) {
2992         my ($name, $cidr) = ($1, $2);
2993         my $ipversion;
2994
2995         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2996
2997         my $data = {
2998             name => $name,
2999             cidr => $cidr,
3000             ipversion => $ipversion,
3001         };
3002         $data->{comment} = $comment  if $comment;
3003         return $data;
3004     }
3005
3006     return undef;
3007 }
3008
3009 sub generic_fw_config_parser {
3010     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
3011
3012     my $section;
3013     my $group;
3014
3015     my $res = $empty_conf;
3016
3017     my $raw;
3018     if ($filename =~ m!^/etc/pve/(.*)$!) {
3019         $raw = PVE::Cluster::get_config($1);
3020     } else {
3021         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
3022     }
3023     return {} if !$raw;
3024
3025     my $curr_group_keys = {};
3026
3027     my $linenr = 0;
3028     while ($raw =~ /^\h*(.*?)\h*$/gm) {
3029         my $line = $1;
3030         $linenr++;
3031         next if $line =~ m/^#/;
3032         next if $line =~ m/^\s*$/;
3033         chomp $line;
3034
3035         my $prefix = "$filename (line $linenr)";
3036
3037         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
3038             $section = 'options';
3039             next;
3040         }
3041
3042         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
3043             $section = 'aliases';
3044             next;
3045         }
3046
3047         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3048             $section = 'groups';
3049             $group = lc($1);
3050             my $comment = $2;
3051             eval {
3052                 die "security group name too long\n" if length($group) > $max_group_name_length;
3053                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
3054             };
3055             if (my $err = $@) {
3056                 ($section, $group, $comment) = undef;
3057                 warn "$prefix: $err";
3058                 next;
3059             }
3060
3061             $res->{$section}->{$group} = [];
3062             $res->{group_comments}->{$group} =  decode('utf8', $comment)
3063                 if $comment;
3064             next;
3065         }
3066
3067         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
3068             $section = 'rules';
3069             next;
3070         }
3071
3072         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
3073             $section = 'ipset';
3074             $group = lc($1);
3075             my $comment = $2;
3076             eval {
3077                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
3078                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
3079             };
3080             if (my $err = $@) {
3081                 ($section, $group, $comment) = undef;
3082                 warn "$prefix: $err";
3083                 next;
3084             }
3085
3086             $res->{$section}->{$group} = [];
3087             $curr_group_keys = {};
3088
3089             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
3090                 if $comment;
3091             next;
3092         }
3093
3094         if (!$section) {
3095             warn "$prefix: skip line - no section\n";
3096             next;
3097         }
3098
3099         if ($section eq 'options') {
3100             eval {
3101                 my ($opt, $value);
3102                 if ($rule_env eq 'cluster') {
3103                     ($opt, $value) = parse_clusterfw_option($line);
3104                 } elsif ($rule_env eq 'host') {
3105                     ($opt, $value) = parse_hostfw_option($line);
3106                 } else {
3107                     ($opt, $value) = parse_vmfw_option($line);
3108                 }
3109                 $res->{options}->{$opt} = $value;
3110             };
3111             warn "$prefix: $@" if $@;
3112         } elsif ($section eq 'aliases') {
3113             eval {
3114                 my $data = parse_alias($line);
3115                 $res->{aliases}->{lc($data->{name})} = $data;
3116             };
3117             warn "$prefix: $@" if $@;
3118         } elsif ($section eq 'rules') {
3119             my $rule;
3120             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3121             if (my $err = $@) {
3122                 warn "$prefix: $err";
3123                 next;
3124             }
3125             push @{$res->{$section}}, $rule;
3126         } elsif ($section eq 'groups') {
3127             my $rule;
3128             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
3129             if (my $err = $@) {
3130                 warn "$prefix: $err";
3131                 next;
3132             }
3133             push @{$res->{$section}->{$group}}, $rule;
3134         } elsif ($section eq 'ipset') {
3135             # we can add single line comments to the end of the rule
3136             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
3137
3138             $line =~ m/^(\!)?\s*(\S+)\s*$/;
3139             my $nomatch = $1;
3140             my $cidr = $2;
3141             my $errors;
3142
3143             if ($nomatch && !$feature_ipset_nomatch) {
3144                 $errors->{nomatch} = "nomatch not supported by kernel";
3145             }
3146
3147             eval {
3148                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3149                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3150                 } else {
3151                     $cidr = parse_ip_or_cidr($cidr);
3152                 }
3153                 die "duplicate ipset entry for '$cidr'\n"
3154                     if defined($curr_group_keys->{$cidr});
3155             };
3156             if (my $err = $@) {
3157                 chomp $err;
3158                 $errors->{cidr} = $err;
3159             }
3160
3161             if ($cidr =~ m!/0+$!) {
3162                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3163             }
3164
3165             my $entry = { cidr => $cidr };
3166             $entry->{nomatch} = 1 if $nomatch;
3167             $entry->{comment} = $comment if $comment;
3168             $entry->{errors} =  $errors if $errors;
3169
3170             if ($verbose && $errors) {
3171                 warn "$prefix - errors in ipset '$group': $line\n";
3172                 foreach my $p (keys %{$errors}) {
3173                     warn "  $p: $errors->{$p}\n";
3174                 }
3175             }
3176
3177             push @{$res->{$section}->{$group}}, $entry;
3178             $curr_group_keys->{$cidr} = 1;
3179         } else {
3180             warn "$prefix: skip line - unknown section\n";
3181             next;
3182         }
3183     }
3184
3185     return $res;
3186 }
3187
3188 # this is only used to prevent concurrent runs of rule compilation/application
3189 # see lock_*_conf for cfs locks protectiong config modification
3190 sub run_locked {
3191     my ($code, @param) = @_;
3192
3193     my $timeout = 10;
3194
3195     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3196
3197     die $@ if $@;
3198
3199     return $res;
3200 }
3201
3202 sub read_local_vm_config {
3203
3204     my $qemu = {};
3205     my $lxc = {};
3206
3207     my $vmdata = { qemu => $qemu, lxc => $lxc };
3208
3209     my $vmlist = PVE::Cluster::get_vmlist();
3210     return $vmdata if !$vmlist || !$vmlist->{ids};
3211     my $ids = $vmlist->{ids};
3212
3213     foreach my $vmid (keys %$ids) {
3214         next if !$vmid; # skip VE0
3215         my $d = $ids->{$vmid};
3216         next if !$d->{node} || $d->{node} ne $nodename;
3217         next if !$d->{type};
3218         if ($d->{type} eq 'qemu') {
3219             if ($have_qemu_server) {
3220                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3221                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3222                     $qemu->{$vmid} = $conf;
3223                 }
3224             }
3225         } elsif ($d->{type} eq 'lxc') {
3226             if ($have_lxc) {
3227                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3228                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3229                     $lxc->{$vmid} = $conf;
3230                 }
3231             }
3232         }
3233     }
3234
3235     return $vmdata;
3236 };
3237
3238 # FIXME: move use sites over to moved helper and break older packages, then remove this here
3239 sub lock_vmfw_conf {
3240     return PVE::Firewall::Helpers::lock_vmfw_conf(@_);
3241 }
3242
3243 sub load_vmfw_conf {
3244     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3245
3246     $dir = $pvefw_conf_dir if !defined($dir);
3247     my $filename = "$dir/$vmid.fw";
3248
3249     my $empty_conf = {
3250         rules => [],
3251         options => {},
3252         aliases => {},
3253         ipset => {} ,
3254         ipset_comments => {},
3255     };
3256
3257     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3258     $vmfw_conf->{vmid} = $vmid;
3259
3260     return $vmfw_conf;
3261 }
3262
3263 my $format_rules = sub {
3264     my ($rules, $allow_iface) = @_;
3265
3266     my $raw = '';
3267
3268     foreach my $rule (@$rules) {
3269         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3270             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3271             $raw .= uc($rule->{type});
3272             if ($rule->{macro}) {
3273                 $raw .= " $rule->{macro}($rule->{action})";
3274             } else {
3275                 $raw .= " " . $rule->{action};
3276             }
3277             if ($allow_iface && $rule->{iface}) {
3278                 $raw .= " -i $rule->{iface}";
3279             }
3280
3281             if ($rule->{type} ne  'group')  {
3282                 $raw .= " -source $rule->{source}" if $rule->{source};
3283                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3284                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3285                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3286                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3287                 $raw .= " -log $rule->{log}" if $rule->{log};
3288                 $raw .= " -icmp-type $rule->{'icmp-type'}" if defined($rule->{'icmp-type'}) && $rule->{'icmp-type'} ne '';
3289             }
3290
3291             $raw .= " # " . encode('utf8', $rule->{comment})
3292                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3293             $raw .= "\n";
3294         } else {
3295             die "unknown rule type '$rule->{type}'";
3296         }
3297     }
3298
3299     return $raw;
3300 };
3301
3302 my $format_options = sub {
3303     my ($options) = @_;
3304
3305     my $raw = '';
3306
3307     $raw .= "[OPTIONS]\n\n";
3308     foreach my $opt (keys %$options) {
3309         $raw .= "$opt: $options->{$opt}\n";
3310     }
3311     $raw .= "\n";
3312
3313     return $raw;
3314 };
3315
3316 my $format_aliases = sub {
3317     my ($aliases) = @_;
3318
3319     my $raw = '';
3320
3321     $raw .= "[ALIASES]\n\n";
3322     foreach my $k (keys %$aliases) {
3323         my $e = $aliases->{$k};
3324         $raw .= "$e->{name} $e->{cidr}";
3325         $raw .= " # " . encode('utf8', $e->{comment})
3326             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3327         $raw .= "\n";
3328     }
3329     $raw .= "\n";
3330
3331     return $raw;
3332 };
3333
3334 my $format_ipsets = sub {
3335     my ($fw_conf) = @_;
3336
3337     my $raw = '';
3338
3339     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3340         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3341             my $utf8comment = encode('utf8', $comment);
3342             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3343         } else {
3344             $raw .= "[IPSET $ipset]\n\n";
3345         }
3346         my $options = $fw_conf->{ipset}->{$ipset};
3347
3348         my $nethash = {};
3349         foreach my $entry (@$options) {
3350             my $cidr = $entry->{cidr};
3351             if (defined($nethash->{$cidr})) {
3352                 warn "ignoring duplicate ipset entry '$cidr'\n";
3353                 next;
3354             }
3355
3356             $nethash->{$cidr} = $entry;
3357         }
3358
3359         foreach my $cidr (sort keys %$nethash) {
3360             my $entry = $nethash->{$cidr};
3361             my $line = $entry->{nomatch} ? '!' : '';
3362             $line .= $entry->{cidr};
3363             $line .= " # " . encode('utf8', $entry->{comment})
3364                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3365             $raw .= "$line\n";
3366         }
3367
3368         $raw .= "\n";
3369     }
3370
3371     return $raw;
3372 };
3373
3374 sub save_vmfw_conf {
3375     my ($vmid, $vmfw_conf) = @_;
3376
3377     my $raw = '';
3378
3379     my $options = $vmfw_conf->{options};
3380     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3381
3382     my $aliases = $vmfw_conf->{aliases};
3383     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3384
3385     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3386
3387     my $rules = $vmfw_conf->{rules} || [];
3388     if ($rules && scalar(@$rules)) {
3389         $raw .= "[RULES]\n\n";
3390         $raw .= &$format_rules($rules, 1);
3391         $raw .= "\n";
3392     }
3393
3394     my $filename = "$pvefw_conf_dir/$vmid.fw";
3395     if ($raw) {
3396         mkdir $pvefw_conf_dir;
3397         PVE::Tools::file_set_contents($filename, $raw);
3398     } else {
3399         unlink $filename;
3400     }
3401 }
3402
3403 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3404 sub remove_vmfw_conf {
3405     return PVE::Firewall::Helpers::remove_vmfw_conf(@_);
3406 }
3407
3408 # FIXME: remove with 8.0 and break older qemu-server/pve-container
3409 sub clone_vmfw_conf {
3410     return PVE::Firewall::Helpers::clone_vmfw_conf(@_);
3411 }
3412
3413 sub read_vm_firewall_configs {
3414     my ($cluster_conf, $vmdata, $dir) = @_;
3415
3416     my $vmfw_configs = {};
3417
3418     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3419         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3420         next if !$vmfw_conf->{options}; # skip if file does not exist
3421         $vmfw_configs->{$vmid} = $vmfw_conf;
3422     }
3423     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3424         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3425         next if !$vmfw_conf->{options}; # skip if file does not exist
3426         $vmfw_configs->{$vmid} = $vmfw_conf;
3427     }
3428
3429     return $vmfw_configs;
3430 }
3431
3432 sub get_option_log_level {
3433     my ($options, $k) = @_;
3434
3435     my $v = $options->{$k};
3436     $v = $default_log_level if !defined($v);
3437
3438     return undef if $v eq '' || $v eq 'nolog';
3439
3440     return $v if defined($log_level_hash->{$v});
3441
3442     warn "unknown log level ($k = '$v')\n";
3443
3444     return undef;
3445 }
3446
3447 sub generate_std_chains {
3448     my ($ruleset, $options, $ipversion) = @_;
3449
3450     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3451
3452     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3453     my $chain = 'PVEFW-smurflog';
3454     if ( $std_chains->{$chain} ) {
3455         foreach my $r (@{$std_chains->{$chain}}) {
3456           $r->{log} = $loglevel;
3457         }
3458     }
3459
3460     # same as shorewall logflags action.
3461     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3462     $chain = 'PVEFW-logflags';
3463     if ( $std_chains->{$chain} ) {
3464         foreach my $r (@{$std_chains->{$chain}}) {
3465           $r->{log} = $loglevel;
3466         }
3467     }
3468
3469     foreach my $chain (keys %$std_chains) {
3470         ruleset_create_chain($ruleset, $chain);
3471         foreach my $rule (@{$std_chains->{$chain}}) {
3472             if (ref($rule)) {
3473                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3474             } else {
3475                 die "rule $rule as string - should not happen";
3476             }
3477         }
3478     }
3479 }
3480
3481 sub generate_ipset_chains {
3482     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3483
3484     foreach my $ipset (keys %{$ipsets}) {
3485
3486         my $options = $ipsets->{$ipset};
3487
3488         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3489             if (my $ips = $device_ips->{$1}) {
3490                 $options = [@$options, @$ips];
3491             }
3492         }
3493
3494         # remove duplicates
3495         my $nethash = {};
3496         foreach my $entry (@$options) {
3497             next if $entry->{errors}; # skip entries with errors
3498             eval {
3499                 my ($cidr, $ver);
3500                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3501                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3502                 } else {
3503                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3504                 }
3505                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3506                 if ($ver == 6) {
3507                     # ip_compress_address takes an address only, no CIDR
3508                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3509                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3510                     $cidr .= $prefix_len if defined($prefix_len);
3511                     $cidr =~ s|/128$||;
3512                 } else {
3513                     $cidr =~ s|/32$||;
3514                 }
3515
3516                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3517             };
3518             warn $@ if $@;
3519         }
3520
3521         foreach my $ipversion (4, 6) {
3522             my $data = $nethash->{$ipversion};
3523
3524             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3525
3526             my $hashsize = scalar(@$options);
3527             if ($hashsize <= 64) {
3528                 $hashsize = 64;
3529             } else {
3530                 $hashsize = round_powerof2($hashsize);
3531             }
3532
3533             my $bucketsize = 12; # lower than the default of 14, faster but slightly more memory use
3534
3535             my $family = $ipversion == "6" ? "inet6" : "inet";
3536
3537             $ipset_ruleset->{$name} = [
3538                 "create $name hash:net family $family hashsize $hashsize maxelem $hashsize bucketsize $bucketsize"
3539             ];
3540
3541             foreach my $cidr (sort keys %$data) {
3542                 my $entry = $data->{$cidr};
3543
3544                 my $cmd = "add $name $cidr";
3545                 if ($entry->{nomatch}) {
3546                     if ($feature_ipset_nomatch) {
3547                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3548                     } else {
3549                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3550                     }
3551                 } else {
3552                     push @{$ipset_ruleset->{$name}}, $cmd;
3553                 }
3554             }
3555         }
3556     }
3557 }
3558
3559 sub round_powerof2 {
3560     my ($int) = @_;
3561
3562     $int--;
3563     $int |= $int >> $_ foreach (1,2,4,8,16);
3564     return ++$int;
3565 }
3566
3567 my $set_global_log_ratelimit = sub {
3568     my $cluster_opts = shift;
3569
3570     $global_log_ratelimit = '--limit 1/sec';
3571     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3572         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3573         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3574
3575         if ($limit->{enable}) {
3576             if (my $rate = $limit->{rate}) {
3577                 $global_log_ratelimit = "--limit $rate";
3578             }
3579             if (my $burst = $limit->{burst}) {
3580                 $global_log_ratelimit .= " --limit-burst $burst";
3581             }
3582         } else {
3583             $global_log_ratelimit = undef;
3584         }
3585     }
3586 };
3587
3588 sub lock_clusterfw_conf {
3589     my ($timeout, $code, @param) = @_;
3590
3591     my $res = PVE::Cluster::cfs_lock_firewall("cluster", $timeout, $code, @param);
3592     die $@ if $@;
3593
3594     return $res;
3595 }
3596
3597 sub load_clusterfw_conf {
3598     my ($filename) = @_;
3599
3600     $filename = $clusterfw_conf_filename if !defined($filename);
3601     my $empty_conf = {
3602         rules => [],
3603         options => {},
3604         aliases => {},
3605         groups => {},
3606         group_comments => {},
3607         ipset => {} ,
3608         ipset_comments => {},
3609     };
3610
3611     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3612     $set_global_log_ratelimit->($cluster_conf->{options});
3613
3614     return $cluster_conf;
3615 }
3616
3617 sub save_clusterfw_conf {
3618     my ($cluster_conf) = @_;
3619
3620     my $raw = '';
3621
3622     my $options = $cluster_conf->{options};
3623     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3624
3625     my $aliases = $cluster_conf->{aliases};
3626     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3627
3628     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3629
3630     my $rules = $cluster_conf->{rules};
3631     if ($rules && scalar(@$rules)) {
3632         $raw .= "[RULES]\n\n";
3633         $raw .= &$format_rules($rules, 1);
3634         $raw .= "\n";
3635     }
3636
3637     if ($cluster_conf->{groups}) {
3638         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3639             my $rules = $cluster_conf->{groups}->{$group};
3640             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3641                 my $utf8comment = encode('utf8', $comment);
3642                 $raw .= "[group $group] # $utf8comment\n\n";
3643             } else {
3644                 $raw .= "[group $group]\n\n";
3645             }
3646
3647             $raw .= &$format_rules($rules, 0);
3648             $raw .= "\n";
3649         }
3650     }
3651
3652     if ($raw) {
3653         mkdir $pvefw_conf_dir;
3654         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3655     } else {
3656         unlink $clusterfw_conf_filename;
3657     }
3658 }
3659
3660 sub lock_hostfw_conf : prototype($$$@) {
3661     my ($node, $timeout, $code, @param) = @_;
3662
3663     $node = $nodename if !defined($node);
3664
3665     my $res = PVE::Cluster::cfs_lock_firewall("host-$node", $timeout, $code, @param);
3666     die $@ if $@;
3667
3668     return $res;
3669 }
3670
3671 sub load_hostfw_conf {
3672     my ($cluster_conf, $filename) = @_;
3673
3674     $filename = $hostfw_conf_filename if !defined($filename);
3675
3676     my $empty_conf = { rules => [], options => {}};
3677     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3678 }
3679
3680 sub save_hostfw_conf {
3681     my ($hostfw_conf, $filename) = @_;
3682
3683     $filename = $hostfw_conf_filename if !defined($filename);
3684
3685     my $raw = '';
3686
3687     my $options = $hostfw_conf->{options};
3688     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3689
3690     my $rules = $hostfw_conf->{rules};
3691     if ($rules && scalar(@$rules)) {
3692         $raw .= "[RULES]\n\n";
3693         $raw .= &$format_rules($rules, 1);
3694         $raw .= "\n";
3695     }
3696
3697     if ($raw) {
3698         PVE::Tools::file_set_contents($filename, $raw);
3699     } else {
3700         unlink $filename;
3701     }
3702 }
3703
3704 sub compile {
3705     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3706
3707     my $vmfw_configs;
3708
3709     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3710     $pve_std_chains = dclone($pve_std_chains_conf);
3711
3712     if ($vmdata) { # test mode
3713         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3714         my $filename = "$testdir/cluster.fw";
3715         $cluster_conf = load_clusterfw_conf($filename);
3716
3717         $filename = "$testdir/host.fw";
3718         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3719
3720         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3721     } else { # normal operation
3722         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3723
3724         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3725
3726         # cfs_update is handled by daemon or API
3727         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3728             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3729
3730         $vmdata = read_local_vm_config();
3731         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3732     }
3733
3734     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3735
3736     my $localnet;
3737     if ($cluster_conf->{aliases}->{local_network}) {
3738         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3739     } else {
3740         my $localnet_ver;
3741         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3742
3743         $cluster_conf->{aliases}->{local_network} = {
3744             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3745     }
3746
3747     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3748
3749     my $ruleset = {};
3750     my $rulesetv6 = {};
3751     $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3752     $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3753     $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3754     $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3755     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3756     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3757
3758     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3759 }
3760
3761 sub compile_iptables_raw {
3762     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3763
3764     my $ruleset = {};
3765
3766     my $hostfw_options = $hostfw_conf->{options} || {};
3767     my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
3768     my $conntrack_helpers = $hostfw_options->{nf_conntrack_helpers} || '';
3769
3770     ruleset_create_chain($ruleset, "PVEFW-PREROUTING") if $protection_synflood != 0 || $conntrack_helpers ne '';
3771
3772     if($protection_synflood) {
3773
3774         my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
3775         my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
3776         my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
3777         my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
3778         $protection_synflood_expire = $protection_synflood_expire * 1000;
3779         my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
3780
3781         ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3782     }
3783
3784     foreach my $conntrack_helper (split(/,/, $conntrack_helpers)) {
3785         my $helper = $pve_fw_helpers->{$conntrack_helper};
3786         ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p $helper->{proto} -m $helper->{proto} --dport $helper->{dport} -j CT", "--helper $conntrack_helper") if $helper && $helper->{"v$ipversion"};
3787     }
3788
3789     return $ruleset;
3790 }
3791
3792 sub compile_iptables_filter {
3793     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3794
3795     my $ruleset = {};
3796
3797     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3798     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3799
3800     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3801
3802     my $hostfw_options = $hostfw_conf->{options} || {};
3803
3804     # fixme: what log level should we use here?
3805     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3806
3807     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3808     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3809
3810     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3811     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3812
3813     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3814
3815     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3816     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3817
3818     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3819
3820     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3821
3822     if ($hostfw_enable) {
3823         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3824         warn $@ if $@; # just to be sure - should not happen
3825     }
3826
3827     # generate firewall rules for QEMU VMs
3828     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3829         eval {
3830             my $conf = $vmdata->{qemu}->{$vmid};
3831             my $vmfw_conf = $vmfw_configs->{$vmid};
3832             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3833
3834             foreach my $netid (sort keys %$conf) {
3835                 next if $netid !~ m/^net(\d+)$/;
3836                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3837                 next if !$net->{firewall};
3838
3839                 my $iface = "tap${vmid}i$1";
3840                 my $macaddr = $net->{macaddr};
3841                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3842                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3843                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3844                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3845             }
3846         };
3847         warn $@ if $@; # just to be sure - should not happen
3848     }
3849
3850     # generate firewall rules for LXC containers
3851     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3852         eval {
3853             my $conf = $vmdata->{lxc}->{$vmid};
3854             my $vmfw_conf = $vmfw_configs->{$vmid};
3855             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3856
3857             foreach my $netid (sort keys %$conf) {
3858                 next if $netid !~ m/^net(\d+)$/;
3859                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3860                 next if !$net->{firewall};
3861
3862                 my $iface = "veth${vmid}i$1";
3863                 my $macaddr = $net->{hwaddr};
3864                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3865                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3866                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3867                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3868             }
3869         };
3870         warn $@ if $@; # just to be sure - should not happen
3871     }
3872
3873     if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3874         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3875     }
3876
3877     return $ruleset;
3878 }
3879
3880 sub mac_to_linklocal {
3881     my ($macaddr) = @_;
3882     my @parts = split(/:/, $macaddr);
3883     # The standard link local address uses the fe80::/64 prefix with the
3884     # modified EUI-64 identifier derived from the MAC address by flipping the
3885     # universal/local bit and inserting FF:FE in the middle.
3886     # See RFC 4291.
3887     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3888     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3889     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3890 }
3891
3892 sub compile_ipsets {
3893     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3894
3895     my $localnet;
3896     if ($cluster_conf->{aliases}->{local_network}) {
3897         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3898     } else {
3899         my $localnet_ver;
3900         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3901
3902         $cluster_conf->{aliases}->{local_network} = {
3903             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3904     }
3905
3906     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3907
3908
3909     my $ipset_ruleset = {};
3910
3911     # generate ipsets for QEMU VMs
3912     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3913         eval {
3914             my $conf = $vmdata->{qemu}->{$vmid};
3915             my $vmfw_conf = $vmfw_configs->{$vmid};
3916             return if !$vmfw_conf;
3917
3918             # When the 'ipfilter' option is enabled every device for which there
3919             # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3920             # ipset.
3921             # The reason is that ipfilter ipsets are always filled with standard
3922             # IPv6 link-local filters.
3923             my $ipsets = $vmfw_conf->{ipset};
3924             my $implicit_sets = {};
3925
3926             my $device_ips = {};
3927             foreach my $netid (keys %$conf) {
3928                 next if $netid !~ m/^net(\d+)$/;
3929                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3930                 next if !$net->{firewall};
3931
3932                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3933                     $implicit_sets->{"ipfilter-$netid"} = [];
3934                 }
3935
3936                 my $macaddr = $net->{macaddr};
3937                 my $linklocal = mac_to_linklocal($macaddr);
3938                 $device_ips->{$netid} = [
3939                     { cidr => $linklocal },
3940                     { cidr => 'fe80::/10', nomatch => 1 }
3941                 ];
3942             }
3943
3944             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3945             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3946         };
3947         warn $@ if $@; # just to be sure - should not happen
3948     }
3949
3950     # generate firewall rules for LXC containers
3951     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3952         eval {
3953             my $conf = $vmdata->{lxc}->{$vmid};
3954             my $vmfw_conf = $vmfw_configs->{$vmid};
3955             return if !$vmfw_conf;
3956
3957             # When the 'ipfilter' option is enabled every device for which there
3958             # is no 'ipfilter-netX' ipset defined gets an implicit empty default
3959             # ipset.
3960             # The reason is that ipfilter ipsets are always filled with standard
3961             # IPv6 link-local filters, as well as the IP addresses configured
3962             # for the container.
3963             my $ipsets = $vmfw_conf->{ipset};
3964             my $implicit_sets = {};
3965
3966             my $device_ips = {};
3967             foreach my $netid (keys %$conf) {
3968                 next if $netid !~ m/^net(\d+)$/;
3969                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3970                 next if !$net->{firewall};
3971
3972                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3973                     $implicit_sets->{"ipfilter-$netid"} = [];
3974                 }
3975
3976                 my $macaddr = $net->{hwaddr};
3977                 my $linklocal = mac_to_linklocal($macaddr);
3978                 my $set = $device_ips->{$netid} = [
3979                     { cidr => $linklocal },
3980                     { cidr => 'fe80::/10', nomatch => 1 }
3981                 ];
3982                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3983                     push @$set, { cidr => $1 };
3984                 }
3985                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3986                     push @$set, { cidr => $1 };
3987                 }
3988             }
3989
3990             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3991             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3992         };
3993         warn $@ if $@; # just to be sure - should not happen
3994     }
3995
3996     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3997
3998     return $ipset_ruleset;
3999 }
4000
4001 sub compile_ebtables_filter {
4002     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
4003
4004     if (!($cluster_conf->{options}->{ebtables} // 1)) {
4005         return {};
4006     }
4007
4008     my $ruleset = {};
4009
4010     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
4011
4012     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
4013     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
4014     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
4015     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
4016     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
4017
4018     # generate firewall rules for QEMU VMs
4019     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
4020         eval {
4021             my $conf = $vmdata->{qemu}->{$vmid};
4022             my $vmfw_conf = $vmfw_configs->{$vmid};
4023             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
4024             my $ipsets = $vmfw_conf->{ipset};
4025
4026             foreach my $netid (sort keys %$conf) {
4027                 next if $netid !~ m/^net(\d+)$/;
4028                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
4029                 next if !$net->{firewall};
4030                 my $iface = "tap${vmid}i$1";
4031                 my $macaddr = $net->{macaddr};
4032                 my $arpfilter = [];
4033                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4034                     foreach my $ipaddr (@$ipset) {
4035                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
4036                         next if !$ip || ($version && $version != 4);
4037                         push(@$arpfilter, $ip);
4038                     }
4039                 }
4040                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4041             }
4042         };
4043         warn $@ if $@; # just to be sure - should not happen
4044     }
4045
4046     # generate firewall rules for LXC containers
4047     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
4048         eval {
4049             my $conf = $vmdata->{lxc}->{$vmid};
4050
4051             my $vmfw_conf = $vmfw_configs->{$vmid};
4052             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
4053             my $ipsets = $vmfw_conf->{ipset};
4054
4055             foreach my $netid (sort keys %$conf) {
4056                 next if $netid !~ m/^net(\d+)$/;
4057                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
4058                 next if !$net->{firewall};
4059                 my $iface = "veth${vmid}i$1";
4060                 my $macaddr = $net->{hwaddr};
4061                 my $arpfilter = [];
4062                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
4063                     foreach my $ipaddr (@$ipset) {
4064                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
4065                         next if !$ip || ($version && $version != 4);
4066                         push(@$arpfilter, $ip);
4067                     }
4068                 }
4069                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
4070                     # ebtables changes this to a .0/MASK network but we just
4071                     # want the address here, no network - see #2193
4072                     $ip =~ s|/(\d+)$||;
4073                     if ($ip ne 'dhcp') {
4074                         push @$arpfilter, $ip;
4075                     }
4076                 }
4077                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
4078             }
4079         };
4080         warn $@ if $@; # just to be sure - should not happen
4081     }
4082
4083     return $ruleset;
4084 }
4085
4086 sub generate_tap_layer2filter {
4087     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
4088     my $options = $vmfw_conf->{options};
4089
4090     my $tapchain = $iface."-OUT";
4091
4092     # ebtables remove zeros from mac pairs
4093     $macaddr =~ s/0([0-9a-f])/$1/ig;
4094     $macaddr = lc($macaddr);
4095
4096     ruleset_create_chain($ruleset, $tapchain);
4097
4098     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
4099         ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
4100     }
4101
4102     if (@$arpfilter){
4103         my $arpchain = $tapchain."-ARP";
4104         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
4105         ruleset_create_chain($ruleset, $arpchain);
4106
4107         foreach my $ip (@{$arpfilter}) {
4108             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4109         }
4110         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
4111     }
4112
4113     if (defined($options->{layer2_protocols})){
4114         my $protochain = $tapchain."-PROTO";
4115         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
4116         ruleset_create_chain($ruleset, $protochain);
4117
4118         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
4119             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
4120         }
4121         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
4122     }
4123
4124     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
4125
4126     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4127 }
4128
4129 # the parameter $change_only_regex changes two things if defined:
4130 # * all chains not matching it will be left intact
4131 # * both the $active_chains hash and the returned status_hash have different
4132 #   structure (they contain a key named 'rules').
4133 sub get_ruleset_status {
4134     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4135
4136     my $statushash = {};
4137
4138     foreach my $chain (sort keys %$ruleset) {
4139         my $rules = $ruleset->{$chain};
4140         my $sig = &$digest_fn($rules);
4141         my $oldsig;
4142
4143         $statushash->{$chain}->{sig} = $sig;
4144         if (defined($change_only_regex)) {
4145             $oldsig = $active_chains->{$chain}->{sig};
4146             $statushash->{$chain}->{rules} = $rules;
4147         } else {
4148             $oldsig = $active_chains->{$chain};
4149         }
4150         if (!defined($oldsig)) {
4151             $statushash->{$chain}->{action} = 'create';
4152         } else {
4153             if ($oldsig eq $sig) {
4154                 $statushash->{$chain}->{action} = 'exists';
4155             } else {
4156                 $statushash->{$chain}->{action} = 'update';
4157             }
4158         }
4159         if ($verbose) {
4160             print "$statushash->{$chain}->{action} $chain ($sig)\n";
4161             foreach my $cmd (@{$rules}) {
4162                 print "\t$cmd\n";
4163             }
4164         }
4165     }
4166
4167     foreach my $chain (sort keys %$active_chains) {
4168         next if defined($ruleset->{$chain});
4169         my $action = 'delete';
4170         my $sig = $active_chains->{$chain};
4171         if (defined($change_only_regex)) {
4172             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4173             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
4174             $statushash->{$chain}->{policy} = $active_chains->{$chain}->{policy};
4175             $sig = $sig->{sig};
4176         }
4177         $statushash->{$chain}->{action} = $action;
4178         $statushash->{$chain}->{sig} = $sig;
4179         print "$action $chain ($sig)\n" if $verbose;
4180     }
4181
4182     return $statushash;
4183 }
4184
4185 sub print_sig_rule {
4186     my ($chain, $sig) = @_;
4187
4188     # We just use this to store a SHA1 checksum used to detect changes
4189     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4190 }
4191
4192 sub get_ruleset_cmdlist {
4193     my ($ruleset, $iptablescmd, $table) = @_;
4194
4195     $table = 'filter' if !$table;
4196
4197     my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4198
4199     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4200     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4201
4202     # create missing chains first
4203     foreach my $chain (sort keys %$ruleset) {
4204         my $stat = $statushash->{$chain};
4205         die "internal error" if !$stat;
4206         next if $stat->{action} ne 'create';
4207
4208         $cmdlist .= ":$chain - [0:0]\n";
4209     }
4210
4211     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4212         my $chain = "PVEFW-$h";
4213         if ($ruleset->{$chain} && !$hooks->{$h}) {
4214             $cmdlist .= "-A $h -j $chain\n";
4215         }
4216     }
4217
4218     foreach my $chain (sort keys %$ruleset) {
4219         my $stat = $statushash->{$chain};
4220         die "internal error" if !$stat;
4221
4222         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4223             $cmdlist .= "-F $chain\n";
4224             foreach my $cmd (@{$ruleset->{$chain}}) {
4225                 $cmdlist .= "$cmd\n";
4226             }
4227             $cmdlist .= print_sig_rule($chain, $stat->{sig});
4228         } elsif ($stat->{action} eq 'delete') {
4229             die "internal error"; # this should not happen
4230         } elsif ($stat->{action} eq 'exists') {
4231             # do nothing
4232         } else {
4233             die "internal error - unknown status '$stat->{action}'";
4234         }
4235     }
4236
4237     foreach my $chain (keys %$statushash) {
4238         next if $statushash->{$chain}->{action} ne 'delete';
4239         $cmdlist .= "-F $chain\n";
4240     }
4241     foreach my $chain (keys %$statushash) {
4242         next if $statushash->{$chain}->{action} ne 'delete';
4243         next if $chain eq 'PVEFW-INPUT';
4244         next if $chain eq 'PVEFW-OUTPUT';
4245         next if $chain eq 'PVEFW-FORWARD';
4246         next if $chain eq 'PVEFW-PREROUTING';
4247         $cmdlist .= "-X $chain\n";
4248     }
4249
4250     my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4251
4252     $cmdlist .= "COMMIT\n";
4253
4254     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4255 }
4256
4257 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4258
4259 sub get_ebtables_cmdlist {
4260     my ($ruleset) = @_;
4261
4262     my $changes = 0;
4263     my $cmdlist = "*filter\n";
4264
4265     my $active_chains = ebtables_get_chains();
4266     my $statushash = get_ruleset_status($ruleset, $active_chains,
4267                                         \&iptables_chain_digest,
4268                                         $pve_ebtables_chainname_regex);
4269
4270     # create chains first and make sure PVE rules are evaluated if active
4271     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4272     my $pve_include = 0;
4273     foreach my $chain (sort keys %$statushash) {
4274         next if ($statushash->{$chain}->{action} eq 'delete');
4275         my $policy = $statushash->{$chain}->{policy} // 'ACCEPT';
4276         $cmdlist .= ":$chain $policy\n";
4277         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4278     }
4279
4280     foreach my $chain (sort keys %$statushash) {
4281         my $stat = $statushash->{$chain};
4282         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4283         next if ($stat->{action} eq 'delete');
4284
4285         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4286             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4287                 next if ! $pve_include;
4288                 $pve_include = 0;
4289             }
4290             $cmdlist .= "$cmd\n";
4291         }
4292     }
4293     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4294
4295     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4296 }
4297
4298 sub get_ipset_cmdlist {
4299     my ($ruleset) = @_;
4300
4301     my $cmdlist = "";
4302
4303     my $delete_cmdlist = "";
4304
4305     my $active_chains = ipset_get_chains();
4306     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4307
4308     # remove stale _swap chains
4309     foreach my $chain (keys %$active_chains) {
4310         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4311             $cmdlist .= "destroy $chain\n";
4312         }
4313     }
4314
4315     foreach my $chain (keys %$ruleset) {
4316         my $stat = $statushash->{$chain};
4317         die "internal error" if !$stat;
4318
4319         if ($stat->{action} eq 'create') {
4320             foreach my $cmd (@{$ruleset->{$chain}}) {
4321                 $cmdlist .= "$cmd\n";
4322             }
4323         }
4324     }
4325
4326     foreach my $chain (keys %$ruleset) {
4327         my $stat = $statushash->{$chain};
4328         die "internal error" if !$stat;
4329
4330         if ($stat->{action} eq 'update') {
4331             my $chain_swap = $chain."_swap";
4332
4333             foreach my $cmd (@{$ruleset->{$chain}}) {
4334                 $cmd =~ s/$chain/$chain_swap/;
4335                 $cmdlist .= "$cmd\n";
4336             }
4337             $cmdlist .= "swap $chain_swap $chain\n";
4338             $cmdlist .= "flush $chain_swap\n";
4339             $cmdlist .= "destroy $chain_swap\n";
4340         }
4341     }
4342
4343      # the remove unused chains
4344     foreach my $chain (keys %$statushash) {
4345         next if $statushash->{$chain}->{action} ne 'delete';
4346
4347         $delete_cmdlist .= "flush $chain\n";
4348         $delete_cmdlist .= "destroy $chain\n";
4349     }
4350
4351     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4352
4353     return ($cmdlist, $delete_cmdlist, $changes);
4354 }
4355
4356 sub apply_ruleset {
4357     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4358
4359     enable_bridge_firewall();
4360
4361     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4362         get_ipset_cmdlist($ipset_ruleset);
4363
4364     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4365     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
4366     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4367     my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4368     my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
4369
4370     if ($verbose) {
4371         if ($ipset_changes) {
4372             print "ipset changes:\n";
4373             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4374             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4375         }
4376
4377         if ($changes) {
4378             print "iptables changes:\n";
4379             print $cmdlist;
4380         }
4381
4382         if ($changesv6) {
4383             print "ip6tables changes:\n";
4384             print $cmdlistv6;
4385         }
4386
4387         if ($changes_raw) {
4388             print "iptables table raw changes:\n";
4389             print $cmdlist_raw;
4390         }
4391
4392         if ($changesv6_raw) {
4393             print "ip6tables table raw changes:\n";
4394             print $cmdlistv6_raw;
4395         }
4396
4397         if ($ebtables_changes) {
4398             print "ebtables changes:\n";
4399             print $ebtables_cmdlist;
4400         }
4401     }
4402
4403     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4404     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4405
4406     ipset_restore_cmdlist($ipset_create_cmdlist);
4407
4408     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4409     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4410
4411     iptables_restore_cmdlist($cmdlist);
4412
4413     $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4414     PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4415
4416     iptables_restore_cmdlist($cmdlist_raw, 'raw');
4417
4418     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4419     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4420
4421     ip6tables_restore_cmdlist($cmdlistv6);
4422
4423     $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4424     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4425
4426     ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4427
4428     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4429     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4430
4431     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4432
4433     ebtables_restore_cmdlist($ebtables_cmdlist);
4434
4435     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4436     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4437
4438     # test: re-read status and check if everything is up to date
4439     my $ruleset_filter = $ruleset->{filter};
4440     my $active_chains = iptables_get_chains();
4441     my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
4442
4443     my $errors;
4444     foreach my $chain (sort keys %$ruleset_filter) {
4445         my $stat = $statushash->{$chain};
4446         if ($stat->{action} ne 'exists') {
4447             warn "unable to update chain '$chain'\n";
4448             $errors = 1;
4449         }
4450     }
4451
4452     my $rulesetv6_filter = $rulesetv6->{filter};
4453     my $active_chainsv6 = iptables_get_chains("ip6tables");
4454     my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
4455
4456     foreach my $chain (sort keys %$rulesetv6_filter) {
4457         my $stat = $statushashv6->{$chain};
4458         if ($stat->{action} ne 'exists') {
4459             warn "unable to update chain '$chain'\n";
4460             $errors = 1;
4461         }
4462     }
4463
4464     my $ruleset_raw = $ruleset->{raw};
4465     my $active_chains_raw = iptables_get_chains(undef, 'raw');
4466     my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4467
4468     foreach my $chain (sort keys %$ruleset_raw) {
4469         my $stat = $statushash_raw->{$chain};
4470         if ($stat->{action} ne 'exists') {
4471             warn "unable to update chain '$chain'\n";
4472             $errors = 1;
4473         }
4474     }
4475
4476     my $rulesetv6_raw = $rulesetv6->{raw};
4477     my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4478     my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4479
4480     foreach my $chain (sort keys %$rulesetv6_raw) {
4481         my $stat = $statushashv6_raw->{$chain};
4482         if ($stat->{action} ne 'exists') {
4483             warn "unable to update chain '$chain'\n";
4484             $errors = 1;
4485         }
4486     }
4487
4488     my $active_ebtables_chains = ebtables_get_chains();
4489     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4490                                 $active_ebtables_chains, \&iptables_chain_digest,
4491                                 $pve_ebtables_chainname_regex);
4492
4493     foreach my $chain (sort keys %$ebtables_ruleset) {
4494         my $stat = $ebtables_statushash->{$chain};
4495         if ($stat->{action} ne 'exists') {
4496             warn "ebtables : unable to update chain '$chain'\n";
4497             $errors = 1;
4498         }
4499     }
4500
4501     die "unable to apply firewall changes\n" if $errors;
4502
4503     update_nf_conntrack_max($hostfw_conf);
4504
4505     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4506
4507     update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf);
4508
4509     update_nf_conntrack_logging($hostfw_conf);
4510 }
4511
4512 sub update_nf_conntrack_max {
4513     my ($hostfw_conf) = @_;
4514
4515     my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4516
4517     my $options = $hostfw_conf->{options} || {};
4518
4519     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4520         $max = $options->{nf_conntrack_max};
4521         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4522     }
4523
4524     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4525     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4526
4527     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4528
4529     if ($current != $max) {
4530         my $hashsize = int($max/4);
4531         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4532         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4533     }
4534 }
4535
4536 sub update_nf_conntrack_tcp_timeout_established {
4537     my ($hostfw_conf) = @_;
4538
4539     my $options = $hostfw_conf->{options} || {};
4540
4541     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4542
4543     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4544 }
4545
4546 sub update_nf_conntrack_tcp_timeout_syn_recv {
4547     my ($hostfw_conf) = @_;
4548
4549     my $options = $hostfw_conf->{options} || {};
4550
4551     my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60;
4552
4553     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4554 }
4555
4556 my $log_nf_conntrack_enabled = undef;
4557 sub update_nf_conntrack_logging {
4558     my ($hostfw_conf) = @_;
4559
4560     my $options = $hostfw_conf->{options} || {};
4561     my $value = $options->{log_nf_conntrack} || 0;
4562     if (!defined($log_nf_conntrack_enabled)
4563         || $value != $log_nf_conntrack_enabled)
4564     {
4565         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4566         PVE::Tools::file_set_contents($tmpfile, $value);
4567
4568         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4569         $log_nf_conntrack_enabled = $value;
4570     }
4571 }
4572
4573 sub remove_pvefw_chains {
4574
4575     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4576     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4577     PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4578     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
4579     PVE::Firewall::remove_pvefw_chains_ipset();
4580     PVE::Firewall::remove_pvefw_chains_ebtables();
4581
4582 }
4583
4584 sub remove_pvefw_chains_iptables {
4585     my ($iptablescmd, $table) = @_;
4586
4587     $table = 'filter' if !$table;
4588
4589     my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4590     my $cmdlist = "*$table\n";
4591
4592     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4593         if ($hooks->{$h}) {
4594             $cmdlist .= "-D $h -j PVEFW-$h\n";
4595         }
4596     }
4597
4598     foreach my $chain (keys %$chash) {
4599         $cmdlist .= "-F $chain\n";
4600     }
4601
4602     foreach my $chain (keys %$chash) {
4603         $cmdlist .= "-X $chain\n";
4604     }
4605     $cmdlist .= "COMMIT\n";
4606
4607     if($iptablescmd eq "ip6tables") {
4608         ip6tables_restore_cmdlist($cmdlist, $table);
4609     } else {
4610         iptables_restore_cmdlist($cmdlist, $table);
4611     }
4612 }
4613
4614 sub remove_pvefw_chains_ipset {
4615
4616     my $ipset_chains = ipset_get_chains();
4617
4618     my $cmdlist = "";
4619
4620     foreach my $chain (keys %$ipset_chains) {
4621         $cmdlist .= "flush $chain\n";
4622         $cmdlist .= "destroy $chain\n";
4623     }
4624
4625     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4626 }
4627
4628 sub remove_pvefw_chains_ebtables {
4629     # apply empty ruleset = remove all our chains
4630     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4631 }
4632
4633 sub init {
4634     my $cluster_conf = load_clusterfw_conf();
4635     my $cluster_options = $cluster_conf->{options};
4636     my $enable = $cluster_options->{enable};
4637
4638     return if !$enable;
4639
4640     # load required modules here
4641 }
4642
4643 sub update {
4644     my $code = sub {
4645
4646         my $cluster_conf = load_clusterfw_conf();
4647         my $cluster_options = $cluster_conf->{options};
4648
4649         if (!$cluster_options->{enable}) {
4650             PVE::Firewall::remove_pvefw_chains();
4651             return;
4652         }
4653
4654         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4655
4656         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4657
4658         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4659     };
4660
4661     run_locked($code);
4662 }
4663
4664 1;