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