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         default => 0,
1260         optional => 1,
1261     },
1262     nf_conntrack_max => {
1263         description => "Maximum number of tracked connections.",
1264         type => 'integer',
1265         optional => 1,
1266         default => 262144,
1267         minimum => 32768,
1268     },
1269     nf_conntrack_tcp_timeout_established => {
1270         description => "Conntrack established timeout.",
1271         type => 'integer',
1272         optional => 1,
1273         default => 432000,
1274         minimum => 7875,
1275     },
1276     nf_conntrack_tcp_timeout_syn_recv => {
1277         description => "Conntrack syn recv timeout.",
1278         type => 'integer',
1279         optional => 1,
1280         default => 60,
1281         minimum => 30,
1282         maximum => 60,
1283     },
1284     ndp => {
1285         description => "Enable NDP (Neighbor Discovery Protocol).",
1286         type => 'boolean',
1287         default => 0,
1288         optional => 1,
1289     },
1290     nf_conntrack_allow_invalid => {
1291         description => "Allow invalid packets on connection tracking.",
1292         type => 'boolean',
1293         default => 0,
1294         optional => 1,
1295     },
1296     protection_synflood => {
1297         description => "Enable synflood protection",
1298         type => 'boolean',
1299         default => 0,
1300         optional => 1,
1301     },
1302     protection_synflood_rate => {
1303         description => "Synflood protection rate syn/sec by ip src.",
1304         type => 'integer',
1305         optional => 1,
1306         default => 200,
1307     },
1308     protection_synflood_burst => {
1309         description => "Synflood protection rate burst by ip src.",
1310         type => 'integer',
1311         optional => 1,
1312         default => 1000,
1313     },
1314     log_nf_conntrack => {
1315         description => "Enable logging of conntrack information.",
1316         type => 'boolean',
1317         default => 0,
1318         optional => 1
1319     },
1320 };
1321
1322 our $vm_option_properties = {
1323     enable => {
1324         description => "Enable/disable firewall rules.",
1325         type => 'boolean',
1326         default => 0,
1327         optional => 1,
1328     },
1329     macfilter => {
1330         description => "Enable/disable MAC address filter.",
1331         type => 'boolean',
1332         default => 0,
1333         optional => 1,
1334     },
1335     dhcp => {
1336         description => "Enable DHCP.",
1337         type => 'boolean',
1338         default => 0,
1339         optional => 1,
1340     },
1341     ndp => {
1342         description => "Enable NDP (Neighbor Discovery Protocol).",
1343         type => 'boolean',
1344         default => 0,
1345         optional => 1,
1346     },
1347     radv => {
1348         description => "Allow sending Router Advertisement.",
1349         type => 'boolean',
1350         optional => 1,
1351     },
1352     ipfilter => {
1353         description => "Enable default IP filters. " .
1354            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1355            "for every interface. Such ipsets implicitly contain sane default " .
1356            "restrictions such as restricting IPv6 link local addresses to " .
1357            "the one derived from the interface's MAC address. For containers " .
1358            "the configured IP addresses will be implicitly added.",
1359         type => 'boolean',
1360         optional => 1,
1361     },
1362     policy_in => {
1363         description => "Input policy.",
1364         type => 'string',
1365         optional => 1,
1366         enum => ['ACCEPT', 'REJECT', 'DROP'],
1367     },
1368     policy_out => {
1369         description => "Output policy.",
1370         type => 'string',
1371         optional => 1,
1372         enum => ['ACCEPT', 'REJECT', 'DROP'],
1373     },
1374     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1375         description => "Log level for incoming traffic." }),
1376     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1377         description => "Log level for outgoing traffic." }),
1378
1379 };
1380
1381
1382 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.";
1383
1384 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.";
1385
1386 my $rule_properties = {
1387     pos => {
1388         description => "Update rule at position <pos>.",
1389         type => 'integer',
1390         minimum => 0,
1391         optional => 1,
1392     },
1393     digest => get_standard_option('pve-config-digest'),
1394     type => {
1395         description => "Rule type.",
1396         type => 'string',
1397         optional => 1,
1398         enum => ['in', 'out', 'group'],
1399     },
1400     action => {
1401         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1402         type => 'string',
1403         optional => 1,
1404         pattern => $security_group_name_pattern,
1405         maxLength => 20,
1406         minLength => 2,
1407     },
1408     macro => {
1409         description => "Use predefined standard macro.",
1410         type => 'string',
1411         optional => 1,
1412         maxLength => 128,
1413     },
1414     iface => get_standard_option('pve-iface', {
1415         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.",
1416         optional => 1
1417     }),
1418     source => {
1419         description => "Restrict packet source address. $addr_list_descr",
1420         type => 'string', format => 'pve-fw-addr-spec',
1421         optional => 1,
1422     },
1423     dest => {
1424         description => "Restrict packet destination address. $addr_list_descr",
1425         type => 'string', format => 'pve-fw-addr-spec',
1426         optional => 1,
1427     },
1428     proto => {
1429         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1430         type => 'string', format => 'pve-fw-protocol-spec',
1431         optional => 1,
1432     },
1433     enable => {
1434         description => "Flag to enable/disable a rule.",
1435         type => 'integer',
1436         minimum => 0,
1437         optional => 1,
1438     },
1439     log => get_standard_option('pve-fw-loglevel', {
1440         description => "Log level for firewall rule.",
1441     }),
1442     sport => {
1443         description => "Restrict TCP/UDP source port. $port_descr",
1444         type => 'string', format => 'pve-fw-sport-spec',
1445         optional => 1,
1446     },
1447     dport => {
1448         description => "Restrict TCP/UDP destination port. $port_descr",
1449         type => 'string', format => 'pve-fw-dport-spec',
1450         optional => 1,
1451     },
1452     comment => {
1453         description => "Descriptive comment.",
1454         type => 'string',
1455         optional => 1,
1456     },
1457 };
1458
1459 sub add_rule_properties {
1460     my ($properties) = @_;
1461
1462     foreach my $k (keys %$rule_properties) {
1463         my $h = $rule_properties->{$k};
1464         # copy data, so that we can modify later without side effects
1465         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1466     }
1467
1468     return $properties;
1469 }
1470
1471 sub delete_rule_properties {
1472     my ($rule, $delete_str) = @_;
1473
1474     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1475         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1476             if !defined($rule_properties->{$opt});
1477         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1478             if $opt eq 'type' || $opt eq 'action';
1479         delete $rule->{$opt};
1480     }
1481
1482     return $rule;
1483 }
1484
1485 my $apply_macro = sub {
1486     my ($macro_name, $param, $verify, $ipversion) = @_;
1487
1488     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1489     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1490
1491     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1492         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1493     }
1494
1495     # skip macros which are specific to another ipversion
1496     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1497         return if $ipversion != $required;
1498     }
1499
1500     my $rules = [];
1501
1502     foreach my $templ (@$macro_rules) {
1503         my $rule = {};
1504         my $param_used = {};
1505         foreach my $k (keys %$templ) {
1506             my $v = $templ->{$k};
1507             if ($v eq 'PARAM') {
1508                 $v = $param->{$k};
1509                 $param_used->{$k} = 1;
1510             } elsif ($v eq 'DEST') {
1511                 $v = $param->{dest};
1512                 $param_used->{dest} = 1;
1513             } elsif ($v eq 'SOURCE') {
1514                 $v = $param->{source};
1515                 $param_used->{source} = 1;
1516             }
1517
1518             if (!defined($v)) {
1519                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1520                 raise_param_exc({ macro => $msg }) if $verify;
1521                 die "$msg\n";
1522             }
1523             $rule->{$k} = $v;
1524         }
1525         foreach my $k (keys %$param) {
1526             next if $k eq 'macro';
1527             next if !defined($param->{$k});
1528             next if $param_used->{$k};
1529             if (defined($rule->{$k})) {
1530                 if ($rule->{$k} ne $param->{$k}) {
1531                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1532                     raise_param_exc({ $k => $msg }) if $verify;
1533                     die "$msg\n";
1534                 }
1535             } else {
1536                 $rule->{$k} = $param->{$k};
1537             }
1538         }
1539         push @$rules, $rule;
1540     }
1541
1542     return $rules;
1543 };
1544
1545 my $rule_env_iface_lookup = {
1546     'ct' => 1,
1547     'vm' => 1,
1548     'group' => 0,
1549     'cluster' => 1,
1550     'host' => 1,
1551 };
1552
1553 sub verify_rule {
1554     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1555
1556     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1557
1558     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1559     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1560
1561     my $errors = $rule->{errors} || {};
1562
1563     my $error_count = 0;
1564
1565     my $add_error = sub {
1566         my ($param, $msg)  = @_;
1567         chomp $msg;
1568         raise_param_exc({ $param => $msg }) if !$noerr;
1569         $error_count++;
1570         $errors->{$param} = $msg if !$errors->{$param};
1571     };
1572
1573     my $ipversion;
1574     my $set_ip_version = sub {
1575         my $vers = shift;
1576         if ($vers) {
1577             die "detected mixed ipv4/ipv6 adresses in rule\n"
1578                 if $ipversion && ($vers != $ipversion);
1579             $ipversion = $vers;
1580         }
1581     };
1582
1583     my $check_ipset_or_alias_property = sub {
1584         my ($name, $expected_ipversion) = @_;
1585
1586         if (my $value = $rule->{$name}) {
1587             if ($value =~ m/^\+/) {
1588                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1589                     &$add_error($name, "no such ipset '$1'")
1590                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1591
1592                 } else {
1593                     &$add_error($name, "invalid ipset name '$value'");
1594                 }
1595             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1596                 my $alias = lc($value);
1597                 &$add_error($name, "no such alias '$value'")
1598                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1599                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1600                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1601
1602                 &$set_ip_version($e->{ipversion});
1603             }
1604         }
1605     };
1606
1607     my $type = $rule->{type};
1608     my $action = $rule->{action};
1609
1610     &$add_error('type', "missing property") if !$type;
1611     &$add_error('action', "missing property") if !$action;
1612
1613     if ($type) {
1614         if ($type eq  'in' || $type eq 'out') {
1615             &$add_error('action', "unknown action '$action'")
1616                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1617         } elsif ($type eq 'group') {
1618             &$add_error('type', "security groups not allowed")
1619                 if !$allow_groups;
1620             &$add_error('action', "invalid characters in security group name")
1621                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1622         } else {
1623             &$add_error('type', "unknown rule type '$type'");
1624         }
1625     }
1626
1627     if ($rule->{iface}) {
1628         &$add_error('type', "parameter -i not allowed for this rule type")
1629             if !$allow_iface;
1630         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1631         &$add_error('iface', $@) if $@;
1632         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1633             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1634                 if $rule->{iface} !~  m/^net(\d+)$/;
1635         }
1636     }
1637
1638     if ($rule->{macro}) {
1639         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1640             $rule->{macro} = $preferred_name;
1641         } else {
1642             &$add_error('macro', "unknown macro '$rule->{macro}'");
1643         }
1644     }
1645
1646     if ($rule->{proto}) {
1647         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1648         &$add_error('proto', $@) if $@;
1649         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1650         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1651     }
1652
1653     if ($rule->{dport}) {
1654         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1655         &$add_error('dport', $@) if $@;
1656         my $proto = $rule->{proto};
1657         &$add_error('proto', "missing property - 'dport' requires this property")
1658             if !$proto;
1659         &$add_error('dport', "protocol '$proto' does not support ports")
1660             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1661                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1662     }
1663
1664     if ($rule->{sport}) {
1665         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1666         &$add_error('sport', $@) if $@;
1667         my $proto = $rule->{proto};
1668         &$add_error('proto', "missing property - 'sport' requires this property")
1669             if !$proto;
1670         &$add_error('sport', "protocol '$proto' does not support ports")
1671             if !$PROTOCOLS_WITH_PORTS->{$proto};
1672     }
1673
1674     if ($rule->{source}) {
1675         eval {
1676             my $source_ipversion = parse_address_list($rule->{source});
1677             &$set_ip_version($source_ipversion);
1678         };
1679         &$add_error('source', $@) if $@;
1680         &$check_ipset_or_alias_property('source', $ipversion);
1681     }
1682
1683     if ($rule->{dest}) {
1684         eval {
1685             my $dest_ipversion = parse_address_list($rule->{dest});
1686             &$set_ip_version($dest_ipversion);
1687         };
1688         &$add_error('dest', $@) if $@;
1689         &$check_ipset_or_alias_property('dest', $ipversion);
1690     }
1691
1692     $rule->{ipversion} = $ipversion if $ipversion;
1693
1694     if ($rule->{macro} && !$error_count) {
1695         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1696         if (my $err = $@) {
1697             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1698                 my $eh = $err->{errors};
1699                 foreach my $p (keys %$eh) {
1700                     &$add_error($p, $eh->{$p});
1701                 }
1702             } else {
1703                 &$add_error('macro', "$err");
1704             }
1705         }
1706     }
1707
1708     $rule->{errors} = $errors if $error_count;
1709
1710     return $rule;
1711 }
1712
1713 sub copy_rule_data {
1714     my ($rule, $param) = @_;
1715
1716     foreach my $k (keys %$rule_properties) {
1717         if (defined(my $v = $param->{$k})) {
1718             if ($v eq '' || $v eq '-') {
1719                 delete $rule->{$k};
1720             } else {
1721                 $rule->{$k} = $v;
1722             }
1723         }
1724     }
1725
1726     return $rule;
1727 }
1728
1729 sub rules_modify_permissions {
1730     my ($rule_env) = @_;
1731
1732     if ($rule_env eq 'host') {
1733         return {
1734             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1735         };
1736     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1737         return {
1738             check => ['perm', '/', [ 'Sys.Modify' ]],
1739         };
1740     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1741         return {
1742             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1743         }
1744     }
1745
1746     return undef;
1747 }
1748
1749 sub rules_audit_permissions {
1750     my ($rule_env) = @_;
1751
1752     if ($rule_env eq 'host') {
1753         return {
1754             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1755         };
1756     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1757         return {
1758             check => ['perm', '/', [ 'Sys.Audit' ]],
1759         };
1760     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1761         return {
1762             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1763         }
1764     }
1765
1766     return undef;
1767 }
1768
1769 # core functions
1770 my $bridge_firewall_enabled = 0;
1771
1772 sub enable_bridge_firewall {
1773
1774     return if $bridge_firewall_enabled; # only once
1775
1776     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1777     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1778
1779     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1780     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1781
1782     $bridge_firewall_enabled = 1;
1783 }
1784
1785 sub iptables_restore_cmdlist {
1786     my ($cmdlist, $table) = @_;
1787
1788     $table = 'filter' if !$table;
1789     run_command(['iptables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1790 }
1791
1792 sub ip6tables_restore_cmdlist {
1793     my ($cmdlist, $table) = @_;
1794
1795     $table = 'filter' if !$table;
1796     run_command(['ip6tables-restore', '-T', $table, '-n'], input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1797 }
1798
1799 sub ipset_restore_cmdlist {
1800     my ($cmdlist) = @_;
1801
1802     run_command(['ipset', 'restore'], input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1803 }
1804
1805 sub ebtables_restore_cmdlist {
1806     my ($cmdlist) = @_;
1807
1808     run_command(['ebtables-restore'], input => $cmdlist, errmsg => "ebtables_restore_cmdlist");
1809 }
1810
1811 sub iptables_get_chains {
1812     my ($iptablescmd, $t) = @_;
1813
1814     $iptablescmd = "iptables" if !$iptablescmd;
1815     $t = 'filter' if !$t;
1816
1817     my $res = {};
1818
1819     # check what chains we want to track
1820     my $is_pvefw_chain = sub {
1821         my $name = shift;
1822
1823         return 1 if $name =~ m/^PVEFW-\S+$/;
1824
1825         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1826
1827         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1828
1829         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1830         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1831
1832         return undef;
1833     };
1834
1835     my $table = '';
1836
1837     my $hooks = {};
1838
1839     my $parser = sub {
1840         my $line = shift;
1841
1842         return if $line =~ m/^#/;
1843         return if $line =~ m/^\s*$/;
1844
1845         if ($line =~ m/^\*(\S+)$/) {
1846             $table = $1;
1847             return;
1848         }
1849
1850         return if $table ne $t;
1851
1852         if ($line =~ m/^:(\S+)\s/) {
1853             my $chain = $1;
1854             return if !&$is_pvefw_chain($chain);
1855             $res->{$chain} = "unknown";
1856         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1857             my ($chain, $sig) = ($1, $2);
1858             return if !&$is_pvefw_chain($chain);
1859             $res->{$chain} = $sig;
1860         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD|PREROUTING)\s+-j\s+PVEFW-\1$/) {
1861             $hooks->{$1} = 1;
1862         } else {
1863             # simply ignore the rest
1864             return;
1865         }
1866     };
1867
1868     run_command(["$iptablescmd-save"], outfunc => $parser);
1869
1870     return wantarray ? ($res, $hooks) : $res;
1871 }
1872
1873 sub iptables_chain_digest {
1874     my ($rules) = @_;
1875     my $digest = Digest::SHA->new('sha1');
1876     foreach my $rule (@$rules) { # order is important
1877         $digest->add($rule);
1878     }
1879     return $digest->b64digest;
1880 }
1881
1882 sub ipset_chain_digest {
1883     my ($rules) = @_;
1884
1885     my $digest = Digest::SHA->new('sha1');
1886     foreach my $rule (sort @$rules) { # note: sorted
1887         $digest->add($rule);
1888     }
1889     return $digest->b64digest;
1890 }
1891
1892 sub ipset_get_chains {
1893
1894     my $res = {};
1895     my $chains = {};
1896
1897     my $parser = sub {
1898         my $line = shift;
1899
1900         return if $line =~ m/^#/;
1901         return if $line =~ m/^\s*$/;
1902         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1903             my $chain = $1;
1904             $line =~ s/\s+$//; # delete trailing white space
1905             push @{$chains->{$chain}}, $line;
1906         } else {
1907             # simply ignore the rest
1908             return;
1909         }
1910     };
1911
1912     run_command(['ipset', 'save'], outfunc => $parser);
1913
1914     # compute digest for each chain
1915     foreach my $chain (keys %$chains) {
1916         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1917     }
1918
1919     return $res;
1920 }
1921
1922 sub ebtables_get_chains {
1923
1924     my $res = {};
1925     my $chains = {};
1926     my $parser = sub {
1927         my $line = shift;
1928         return if $line =~ m/^#/;
1929         return if $line =~ m/^\s*$/;
1930         if ($line =~ m/^:(\S+)\s\S+$/) {
1931             # Make sure we know chains exist even if they're empty.
1932             $chains->{$1} //= [];
1933         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1934             my $chain = $1;
1935             $line =~ s/\s+$//;
1936             push @{$chains->{$chain}}, $line;
1937         } else {
1938             # simply ignore the rest
1939             return;
1940         }
1941     };
1942
1943     run_command(['ebtables-save'], outfunc => $parser);
1944     # compute digest for each chain and store rules as well
1945     foreach my $chain (keys %$chains) {
1946         $res->{$chain}->{rules} = $chains->{$chain};
1947         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1948     }
1949     return $res;
1950 }
1951
1952 # substitude action of rule according to action hash
1953 sub rule_substitude_action {
1954     my ($rule, $actions) = @_;
1955
1956     if (my $action = $rule->{action}) {
1957         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1958     }
1959 }
1960
1961 # generate a src or dst match
1962 # $dir(ection) is either d or s
1963 sub ipt_gen_src_or_dst_match {
1964     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1965
1966     my $srcdst;
1967     if ($dir eq 's') {
1968         $srcdst = "src";
1969     } elsif ($dir eq 'd') {
1970         $srcdst = "dst";
1971     } else {
1972         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1973     }
1974
1975     my $match;
1976     if ($adr =~ m/^\+/) {
1977         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1978             my $name = $1;
1979             my $ipset_chain;
1980             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1981                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1982             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1983                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1984             } else {
1985                 die "no such ipset '$name'\n";
1986             }
1987             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1988         } else {
1989             die "invalid security group name '$adr'\n";
1990         }
1991     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1992         my $alias = lc($adr);
1993         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1994         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1995         die "no such alias '$adr'\n" if !$e;
1996         $match = "-${dir} $e->{cidr}";
1997     } elsif ($adr =~ m/\-/){
1998         $match = "-m iprange --${srcdst}-range $adr";
1999     } else {
2000         $match = "-${dir} $adr";
2001     }
2002
2003     return $match;
2004 }
2005
2006 # convert a %rule to an array of iptables commands
2007 sub ipt_rule_to_cmds {
2008     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2009
2010     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2011
2012     my @match = ();
2013
2014     if (defined $rule->{match}) {
2015         push @match, $rule->{match};
2016     } else {
2017         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
2018         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
2019
2020         if ($rule->{source}) {
2021             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
2022         }
2023         if ($rule->{dest}) {
2024             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
2025         }
2026
2027         if (my $proto = $rule->{proto}) {
2028             push @match, "-p $proto";
2029
2030             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
2031             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
2032
2033             my $add_dport = sub {
2034                 return if !$rule->{dport};
2035
2036                 if ($proto eq 'icmp') {
2037                     # Note: we use dport to store --icmp-type
2038                     die "unknown icmp-type '$rule->{dport}'\n"
2039                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
2040                     push @match, "-m icmp --icmp-type $rule->{dport}";
2041                 } elsif ($proto eq 'icmpv6') {
2042                     # Note: we use dport to store --icmpv6-type
2043                     die "unknown icmpv6-type '$rule->{dport}'\n"
2044                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
2045                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2046                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2047                     die "protocol $proto does not have ports\n";
2048                 } elsif ($multidport) {
2049                     push @match, "--match multiport", "--dports $rule->{dport}";
2050                 } else {
2051                     push @match, "--dport $rule->{dport}";
2052                 }
2053             };
2054
2055             my $add_sport = sub {
2056                 return if !$rule->{sport};
2057
2058                 die "protocol $proto does not have ports\n"
2059                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2060                 if ($multisport) {
2061                     push @match, "--match multiport", "--sports $rule->{sport}";
2062                 } else {
2063                     push @match, "--sport $rule->{sport}";
2064                 }
2065             };
2066
2067             # order matters - single port before multiport!
2068             $add_dport->() if $multisport;
2069             $add_sport->();
2070             $add_dport->() if !$multisport;
2071         } elsif ($rule->{dport} || $rule->{sport}) {
2072             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2073             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2074         }
2075
2076         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2077     }
2078     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2079
2080     my $targetstr;
2081     if (defined $rule->{target}) {
2082         $targetstr = $rule->{target};
2083     } else {
2084         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2085         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2086         $targetstr = ($goto) ? "-g $action" : "-j $action";
2087     }
2088
2089     my @iptcmds;
2090     my $log = $rule->{log};
2091     if (defined($log) && $log ne 'nolog') {
2092         my $loglevel = $log_level_hash->{$log};
2093         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2094         push @iptcmds, "-A $chain $matchstr $logaction";
2095     }
2096     push @iptcmds, "-A $chain $matchstr $targetstr";
2097     return @iptcmds;
2098 }
2099
2100 sub ruleset_generate_rule {
2101     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2102
2103     my $rules;
2104
2105     if ($rule->{macro}) {
2106         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2107     } else {
2108         $rules = [ $rule ];
2109     }
2110
2111     # update all or nothing
2112     my @ipt_rule_cmds;
2113     foreach my $r (@$rules) {
2114         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2115     }
2116     foreach my $c (@ipt_rule_cmds) {
2117         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2118     }
2119 }
2120
2121 sub ruleset_create_chain {
2122     my ($ruleset, $chain) = @_;
2123
2124     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2125     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2126
2127     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2128
2129     $ruleset->{$chain} = [];
2130 }
2131
2132 sub ruleset_chain_exist {
2133     my ($ruleset, $chain) = @_;
2134
2135     return $ruleset->{$chain} ? 1 : undef;
2136 }
2137
2138 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2139 sub ruleset_add_ipt_cmd {
2140    my ($ruleset, $chain, $iptcmd) = @_;
2141
2142    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2143
2144    push @{$ruleset->{$chain}}, $iptcmd;
2145 }
2146
2147 sub ruleset_addrule {
2148     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2149
2150     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2151
2152     if ($log) {
2153         my $loglevel = $log_level_hash->{$log};
2154         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2155         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2156     }
2157     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2158     $match .= ' ' if length($match);
2159     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2160 }
2161
2162 sub ruleset_insertrule {
2163    my ($ruleset, $chain, $match, $action, $log) = @_;
2164
2165    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2166
2167    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2168 }
2169
2170 sub get_log_rule_base {
2171     my ($chain, $vmid, $msg, $loglevel) = @_;
2172
2173     $vmid = 0 if !defined($vmid);
2174     $msg = "" if !defined($msg);
2175
2176     my $rlimit = '';
2177     if (defined($global_log_ratelimit)) {
2178         $rlimit = "-m limit $global_log_ratelimit ";
2179     }
2180
2181     # Note: we use special format for prefix to pass further
2182     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2183     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2184 }
2185
2186 sub ruleset_add_chain_policy {
2187     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2188
2189     if ($policy eq 'ACCEPT') {
2190
2191         my $rule = { action => 'ACCEPT' };
2192         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2193         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2194
2195     } elsif ($policy eq 'DROP') {
2196
2197         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2198
2199         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2200     } elsif ($policy eq 'REJECT') {
2201         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2202
2203         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2204     } else {
2205         # should not happen
2206         die "internal error: unknown policy '$policy'";
2207     }
2208 }
2209
2210 sub ruleset_chain_add_ndp {
2211     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2212     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2213
2214     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2215     if ($direction ne 'OUT' || $options->{radv}) {
2216         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2217     }
2218     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2219     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2220 }
2221
2222 sub ruleset_chain_add_conn_filters {
2223     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2224
2225     if (!$allow_invalid) {
2226         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2227     }
2228     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2229 }
2230
2231 sub ruleset_chain_add_input_filters {
2232     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2233
2234     if ($cluster_conf->{ipset}->{blacklist}){
2235         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2236             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2237             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2238         }
2239         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2240         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2241     }
2242
2243     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2244         if ($ipversion == 4) {
2245             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2246         }
2247     }
2248
2249     if ($options->{tcpflags}) {
2250         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2251     }
2252 }
2253
2254 sub ruleset_create_vm_chain {
2255     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2256
2257     ruleset_create_chain($ruleset, $chain);
2258     my $accept = generate_nfqueue($options);
2259
2260     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2261         if ($ipversion == 4) {
2262             if ($direction eq 'OUT') {
2263                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2264                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2265                                         proto => 'udp', sport => 68, dport => 67 });
2266             } else {
2267                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2268                                       { action => 'ACCEPT',
2269                                         proto => 'udp', sport => 67, dport => 68 });
2270             }
2271         } elsif ($ipversion == 6) {
2272             if ($direction eq 'OUT') {
2273                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2274                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2275                                         proto => 'udp', sport => 546, dport => 547 });
2276             } else {
2277                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2278                                       { action => 'ACCEPT',
2279                                         proto => 'udp', sport => 547, dport => 546 });
2280             }
2281         }
2282
2283     }
2284
2285     if ($direction eq 'OUT') {
2286         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2287             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2288         }
2289         if ($ipversion == 6 && !$options->{radv}) {
2290             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2291         }
2292         if ($ipfilter_ipset) {
2293             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2294         }
2295         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2296     }
2297
2298     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2299     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2300 }
2301
2302 sub ruleset_add_group_rule {
2303     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2304
2305     my $group = $rule->{action};
2306     my $group_chain = "GROUP-$group-$direction";
2307     if(!ruleset_chain_exist($ruleset, $group_chain)){
2308         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2309     }
2310
2311     if ($direction eq 'OUT' && $rule->{iface_out}) {
2312         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2313     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2314         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2315     } else {
2316         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2317     }
2318
2319     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2320 }
2321
2322 sub ruleset_generate_vm_rules {
2323     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2324
2325     my $lc_direction = lc($direction);
2326
2327     my $in_accept = generate_nfqueue($options);
2328
2329     foreach my $rule (@$rules) {
2330         next if $rule->{iface} && $rule->{iface} ne $netid;
2331         next if !$rule->{enable} || $rule->{errors};
2332         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2333
2334         if ($rule->{type} eq 'group') {
2335             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2336                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2337         } else {
2338             next if $rule->{type} ne $lc_direction;
2339             eval {
2340                 $rule->{logmsg} = "$rule->{action}: ";
2341                 if ($direction eq 'OUT') {
2342                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2343                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2344                 } else {
2345                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2346                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2347                 }
2348             };
2349             warn $@ if $@;
2350         }
2351     }
2352 }
2353
2354 sub generate_nfqueue {
2355     my ($options) = @_;
2356
2357     if ($options->{ips}) {
2358         my $action = "NFQUEUE";
2359         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2360             if (defined($3) && defined($1)) {
2361                 $action .= " --queue-balance $1:$3";
2362             } elsif (defined($1)) {
2363                 $action .= " --queue-num $1";
2364             }
2365         }
2366         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2367         return $action;
2368     } else {
2369         return "ACCEPT";
2370     }
2371 }
2372
2373 sub ruleset_generate_vm_ipsrules {
2374     my ($ruleset, $options, $direction, $iface) = @_;
2375
2376     if ($options->{ips} && $direction eq 'IN') {
2377         my $nfqueue = generate_nfqueue($options);
2378
2379         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2380             ruleset_create_chain($ruleset, "PVEFW-IPS");
2381         }
2382
2383         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2384     }
2385 }
2386
2387 sub generate_tap_rules_direction {
2388     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2389
2390     my $lc_direction = lc($direction);
2391
2392     my $rules = $vmfw_conf->{rules};
2393
2394     my $options = $vmfw_conf->{options};
2395     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2396
2397     my $tapchain = "$iface-$direction";
2398
2399     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2400     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2401         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2402
2403     if ($options->{enable}) {
2404         # create chain with mac and ip filter
2405         ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2406
2407         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2408
2409         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2410
2411         # implement policy
2412         my $policy;
2413
2414         if ($direction eq 'OUT') {
2415             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2416         } else {
2417             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2418         }
2419
2420         my $accept = generate_nfqueue($options);
2421         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2422         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2423     } else {
2424         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2425         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2426     }
2427
2428     # plug the tap chain to bridge chain
2429     if ($direction eq 'IN') {
2430         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2431                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2432     } else {
2433         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2434                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2435     }
2436 }
2437
2438 sub enable_host_firewall {
2439     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2440
2441     my $options = $hostfw_conf->{options};
2442     my $cluster_options = $cluster_conf->{options};
2443     my $rules = $hostfw_conf->{rules};
2444     my $cluster_rules = $cluster_conf->{rules};
2445
2446     # corosync preparation
2447     my $corosync_rule = "-p udp --dport 5404:5405";
2448     my $corosync_local_addresses = {};
2449     my $multicast_enabled;
2450     my $local_hostname = PVE::INotify::nodename();
2451     if (defined($corosync_conf)) {
2452         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2453             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2454
2455             if ($node_name eq $local_hostname) {
2456                 $corosync_local_addresses->{$key} = $node_ip;
2457             }
2458         });
2459
2460         # allow multicast only if enabled in config
2461         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2462         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2463     }
2464
2465     # host inbound firewall
2466     my $chain = "PVEFW-HOST-IN";
2467     ruleset_create_chain($ruleset, $chain);
2468
2469     my $loglevel = get_option_log_level($options, "log_level_in");
2470
2471     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2472
2473     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2474     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2475     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2476
2477     # we use RETURN because we need to check also tap rules
2478     my $accept_action = 'RETURN';
2479
2480     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2481
2482     # add host rules first, so that cluster wide rules can be overwritten
2483     foreach my $rule (@$rules, @$cluster_rules) {
2484         next if !$rule->{enable} || $rule->{errors};
2485         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2486
2487         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2488
2489         eval {
2490             if ($rule->{type} eq 'group') {
2491                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2492             } elsif ($rule->{type} eq 'in') {
2493                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2494                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2495             }
2496         };
2497         warn $@ if $@;
2498         delete $rule->{iface_in};
2499     }
2500
2501     # allow standard traffic for management ipset (includes cluster network)
2502     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2503     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2504     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2505     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2506     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2507     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2508     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action");  # Migration
2509
2510     # corosync inbound rules
2511     if (defined($corosync_conf)) {
2512         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2513             if $multicast_enabled;
2514
2515         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2516             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2517             my $destination = $corosync_local_addresses->{$key};
2518
2519             if ($node_name ne $local_hostname && defined($destination)) {
2520                 # accept only traffic on same ring
2521                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2522             }
2523         });
2524     }
2525
2526     # implement input policy
2527     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2528     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2529
2530     # host outbound firewall
2531     $chain = "PVEFW-HOST-OUT";
2532     ruleset_create_chain($ruleset, $chain);
2533
2534     $loglevel = get_option_log_level($options, "log_level_out");
2535
2536     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2537
2538     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2539
2540     # we use RETURN because we may want to check other thigs later
2541     $accept_action = 'RETURN';
2542     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2543
2544     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2545
2546     # add host rules first, so that cluster wide rules can be overwritten
2547     foreach my $rule (@$rules, @$cluster_rules) {
2548         next if !$rule->{enable} || $rule->{errors};
2549         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2550
2551         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2552         eval {
2553             $rule->{logmsg} = "$rule->{action}: ";
2554             if ($rule->{type} eq 'group') {
2555                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2556             } elsif ($rule->{type} eq 'out') {
2557                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2558                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2559             }
2560         };
2561         warn $@ if $@;
2562         delete $rule->{iface_out};
2563     }
2564
2565     # allow standard traffic on cluster network
2566     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2567     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2568
2569     if ($localnet && ($ipversion == $localnet_ver)) {
2570         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2571         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2572         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2573         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2574     }
2575
2576     # corosync outbound rules
2577     if (defined($corosync_conf)) {
2578         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2579             if $multicast_enabled;
2580
2581         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2582             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2583             my $source = $corosync_local_addresses->{$key};
2584
2585             if ($node_name ne $local_hostname && defined($source)) {
2586                 # accept only traffic on same ring
2587                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2588             }
2589         });
2590     }
2591
2592     # implement output policy
2593     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2594     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2595
2596     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2597     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2598 }
2599
2600 sub generate_group_rules {
2601     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2602
2603     my $rules = $cluster_conf->{groups}->{$group};
2604
2605     if (!$rules) {
2606         warn "no such security group '$group'\n";
2607         $rules = []; # create empty chain
2608     }
2609
2610     my $chain = "GROUP-${group}-IN";
2611
2612     ruleset_create_chain($ruleset, $chain);
2613     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2614
2615     foreach my $rule (@$rules) {
2616         next if $rule->{type} ne 'in';
2617         next if !$rule->{enable} || $rule->{errors};
2618         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2619         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2620         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2621     }
2622
2623     $chain = "GROUP-${group}-OUT";
2624
2625     ruleset_create_chain($ruleset, $chain);
2626     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2627
2628     foreach my $rule (@$rules) {
2629         next if $rule->{type} ne 'out';
2630         next if !$rule->{enable} || $rule->{errors};
2631         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2632         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2633         # check also other tap rules later
2634         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2635         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2636     }
2637 }
2638
2639 my $MAX_NETS = 32;
2640 my $valid_netdev_names = {};
2641 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2642     $valid_netdev_names->{"net$i"} = 1;
2643 }
2644
2645 sub get_mark_values {
2646     my ($value, $mask) = @_;
2647     $value = hex($value) if $value =~ /^0x/;
2648     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2649     $mask = 0xffffffff if !defined($mask);
2650     return ($value, $mask);
2651 }
2652
2653 sub parse_fw_rule {
2654     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2655
2656     my $orig_line = $line;
2657
2658     my $rule = {};
2659
2660     # we can add single line comments to the end of the rule
2661     if ($line =~ s/#\s*(.*?)\s*$//) {
2662         $rule->{comment} = decode('utf8', $1);
2663     }
2664
2665     # we can disable a rule when prefixed with '|'
2666
2667     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2668
2669     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2670         die "unable to parse rule: $line\n";
2671
2672     $rule->{type} = lc($1);
2673     $rule->{action} = $2;
2674
2675     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2676         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2677             $rule->{macro} = $1;
2678             $rule->{action} = $2;
2679         }
2680     }
2681
2682     while (length($line)) {
2683         if ($line =~ s/^-i (\S+)\s*//) {
2684             $rule->{iface} = $1;
2685             next;
2686         }
2687
2688         last if $rule->{type} eq 'group';
2689
2690         if ($line =~ s/^-p (\S+)\s*//) {
2691             $rule->{proto} = $1;
2692             next;
2693         }
2694
2695         if ($line =~ s/^-dport (\S+)\s*//) {
2696             $rule->{dport} = $1;
2697             next;
2698         }
2699
2700         if ($line =~ s/^-sport (\S+)\s*//) {
2701             $rule->{sport} = $1;
2702             next;
2703         }
2704         if ($line =~ s/^-source (\S+)\s*//) {
2705             $rule->{source} = $1;
2706             next;
2707         }
2708         if ($line =~ s/^-dest (\S+)\s*//) {
2709             $rule->{dest} = $1;
2710             next;
2711         }
2712         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2713             $rule->{log} = $1;
2714             next;
2715         }
2716
2717         last;
2718     }
2719
2720     die "unable to parse rule parameters: $line\n" if length($line);
2721
2722     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2723     if ($rule->{errors}) {
2724         # The verbose flag really means we're running from the CLI and want
2725         # output on the console - in the other case we really want such errors
2726         # to go into the syslog instead.
2727         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2728         $log->("$prefix - errors in rule parameters: $orig_line\n");
2729         foreach my $p (keys %{$rule->{errors}}) {
2730             $log->("  $p: $rule->{errors}->{$p}\n");
2731         }
2732     }
2733
2734     return $rule;
2735 }
2736
2737 sub verify_ethertype {
2738     my ($value) = @_;
2739     my $types = get_etc_ethertypes();
2740     die "unknown ethernet protocol type: $value\n"
2741         if !defined($types->{byname}->{$value}) &&
2742            !defined($types->{byid}->{$value});
2743 }
2744
2745 sub parse_vmfw_option {
2746     my ($line) = @_;
2747
2748     my ($opt, $value);
2749
2750     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2751
2752     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2753         $opt = lc($1);
2754         $value = int($2);
2755     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2756         $opt = lc($1);
2757         $value = $2 ? lc($3) : '';
2758     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2759         $opt = lc($1);
2760         $value = uc($3);
2761     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2762         $opt = lc($1);
2763         $value = $2;
2764     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2765         $opt = lc($1);
2766         $value = $2;
2767         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2768     } else {
2769         die "can't parse option '$line'\n"
2770     }
2771
2772     return ($opt, $value);
2773 }
2774
2775 sub parse_hostfw_option {
2776     my ($line) = @_;
2777
2778     my ($opt, $value);
2779
2780     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2781
2782     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2783         $opt = lc($1);
2784         $value = int($2);
2785     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2786         $opt = lc($1);
2787         $value = $2 ? lc($3) : '';
2788     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established|nf_conntrack_tcp_timeout_syn_recv|protection_synflood_rate|protection_synflood_burst|protection_limit):\s*(\d+)\s*$/i) {
2789         $opt = lc($1);
2790         $value = int($2);
2791     } else {
2792         die "can't parse option '$line'\n"
2793     }
2794
2795     return ($opt, $value);
2796 }
2797
2798 sub parse_clusterfw_option {
2799     my ($line) = @_;
2800
2801     my ($opt, $value);
2802
2803     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2804         $opt = lc($1);
2805         $value = int($2);
2806         if (($value > 1) && ((time() - $value) > 60)) {
2807             $value = 0
2808         }
2809     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2810         $opt = lc($1);
2811         $value = int($2);
2812     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2813         $opt = lc($1);
2814         $value = uc($3);
2815     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2816         $opt = lc($1);
2817         $value = $2;
2818     } else {
2819         die "can't parse option '$line'\n"
2820     }
2821
2822     return ($opt, $value);
2823 }
2824
2825 sub resolve_alias {
2826     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2827
2828     my $alias = lc($cidr);
2829     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2830     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2831
2832     die "no such alias '$cidr'\n" if !$e;;
2833
2834     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2835 }
2836
2837 sub parse_ip_or_cidr {
2838     my ($cidr) = @_;
2839
2840     my $ipversion;
2841
2842     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2843         $cidr =~ s|/128$||;
2844         $ipversion = 6;
2845     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2846         $cidr =~ s|/32$||;
2847         $ipversion = 4;
2848     } else {
2849         die "value does not look like a valid IP address or CIDR network\n";
2850     }
2851
2852     return wantarray ? ($cidr, $ipversion) : $cidr;
2853 }
2854
2855 sub parse_alias {
2856     my ($line) = @_;
2857
2858     # we can add single line comments to the end of the line
2859     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2860
2861     if ($line =~ m/^(\S+)\s(\S+)$/) {
2862         my ($name, $cidr) = ($1, $2);
2863         my $ipversion;
2864
2865         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2866
2867         my $data = {
2868             name => $name,
2869             cidr => $cidr,
2870             ipversion => $ipversion,
2871         };
2872         $data->{comment} = $comment  if $comment;
2873         return $data;
2874     }
2875
2876     return undef;
2877 }
2878
2879 sub generic_fw_config_parser {
2880     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2881
2882     my $section;
2883     my $group;
2884
2885     my $res = $empty_conf;
2886
2887     my $raw;
2888     if ($filename =~ m!^/etc/pve/(.*)$!) {
2889         $raw = PVE::Cluster::get_config($1);
2890     } else {
2891         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2892     }
2893     return {} if !$raw;
2894
2895     my $linenr = 0;
2896     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2897         my $line = $1;
2898         $linenr++;
2899         next if $line =~ m/^#/;
2900         next if $line =~ m/^\s*$/;
2901         chomp $line;
2902
2903         my $prefix = "$filename (line $linenr)";
2904
2905         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2906             $section = 'options';
2907             next;
2908         }
2909
2910         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2911             $section = 'aliases';
2912             next;
2913         }
2914
2915         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2916             $section = 'groups';
2917             $group = lc($1);
2918             my $comment = $2;
2919             eval {
2920                 die "security group name too long\n" if length($group) > $max_group_name_length;
2921                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2922             };
2923             if (my $err = $@) {
2924                 ($section, $group, $comment) = undef;
2925                 warn "$prefix: $err";
2926                 next;
2927             }
2928
2929             $res->{$section}->{$group} = [];
2930             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2931                 if $comment;
2932             next;
2933         }
2934
2935         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2936             $section = 'rules';
2937             next;
2938         }
2939
2940         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2941             $section = 'ipset';
2942             $group = lc($1);
2943             my $comment = $2;
2944             eval {
2945                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2946                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2947             };
2948             if (my $err = $@) {
2949                 ($section, $group, $comment) = undef;
2950                 warn "$prefix: $err";
2951                 next;
2952             }
2953
2954             $res->{$section}->{$group} = [];
2955             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2956                 if $comment;
2957             next;
2958         }
2959
2960         if (!$section) {
2961             warn "$prefix: skip line - no section\n";
2962             next;
2963         }
2964
2965         if ($section eq 'options') {
2966             eval {
2967                 my ($opt, $value);
2968                 if ($rule_env eq 'cluster') {
2969                     ($opt, $value) = parse_clusterfw_option($line);
2970                 } elsif ($rule_env eq 'host') {
2971                     ($opt, $value) = parse_hostfw_option($line);
2972                 } else {
2973                     ($opt, $value) = parse_vmfw_option($line);
2974                 }
2975                 $res->{options}->{$opt} = $value;
2976             };
2977             warn "$prefix: $@" if $@;
2978         } elsif ($section eq 'aliases') {
2979             eval {
2980                 my $data = parse_alias($line);
2981                 $res->{aliases}->{lc($data->{name})} = $data;
2982             };
2983             warn "$prefix: $@" if $@;
2984         } elsif ($section eq 'rules') {
2985             my $rule;
2986             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
2987             if (my $err = $@) {
2988                 warn "$prefix: $err";
2989                 next;
2990             }
2991             push @{$res->{$section}}, $rule;
2992         } elsif ($section eq 'groups') {
2993             my $rule;
2994             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
2995             if (my $err = $@) {
2996                 warn "$prefix: $err";
2997                 next;
2998             }
2999             push @{$res->{$section}->{$group}}, $rule;
3000         } elsif ($section eq 'ipset') {
3001             # we can add single line comments to the end of the rule
3002             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
3003
3004             $line =~ m/^(\!)?\s*(\S+)\s*$/;
3005             my $nomatch = $1;
3006             my $cidr = $2;
3007             my $errors;
3008
3009             if ($nomatch && !$feature_ipset_nomatch) {
3010                 $errors->{nomatch} = "nomatch not supported by kernel";
3011             }
3012
3013             eval {
3014                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3015                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3016                 } else {
3017                     $cidr = parse_ip_or_cidr($cidr);
3018                 }
3019             };
3020             if (my $err = $@) {
3021                 chomp $err;
3022                 $errors->{cidr} = $err;
3023             }
3024
3025             if ($cidr =~ m!/0+$!) {
3026                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3027             }
3028
3029             my $entry = { cidr => $cidr };
3030             $entry->{nomatch} = 1 if $nomatch;
3031             $entry->{comment} = $comment if $comment;
3032             $entry->{errors} =  $errors if $errors;
3033
3034             if ($verbose && $errors) {
3035                 warn "$prefix - errors in ipset '$group': $line\n";
3036                 foreach my $p (keys %{$errors}) {
3037                     warn "  $p: $errors->{$p}\n";
3038                 }
3039             }
3040
3041             push @{$res->{$section}->{$group}}, $entry;
3042         } else {
3043             warn "$prefix: skip line - unknown section\n";
3044             next;
3045         }
3046     }
3047
3048     return $res;
3049 }
3050
3051 sub run_locked {
3052     my ($code, @param) = @_;
3053
3054     my $timeout = 10;
3055
3056     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3057
3058     die $@ if $@;
3059
3060     return $res;
3061 }
3062
3063 sub read_local_vm_config {
3064
3065     my $qemu = {};
3066     my $lxc = {};
3067
3068     my $vmdata = { qemu => $qemu, lxc => $lxc };
3069
3070     my $vmlist = PVE::Cluster::get_vmlist();
3071     return $vmdata if !$vmlist || !$vmlist->{ids};
3072     my $ids = $vmlist->{ids};
3073
3074     foreach my $vmid (keys %$ids) {
3075         next if !$vmid; # skip VE0
3076         my $d = $ids->{$vmid};
3077         next if !$d->{node} || $d->{node} ne $nodename;
3078         next if !$d->{type};
3079         if ($d->{type} eq 'qemu') {
3080             if ($have_qemu_server) {
3081                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3082                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3083                     $qemu->{$vmid} = $conf;
3084                 }
3085             }
3086         } elsif ($d->{type} eq 'lxc') {
3087             if ($have_lxc) {
3088                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3089                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3090                     $lxc->{$vmid} = $conf;
3091                 }
3092             }
3093         }
3094     }
3095
3096     return $vmdata;
3097 };
3098
3099 sub load_vmfw_conf {
3100     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3101
3102     $dir = $pvefw_conf_dir if !defined($dir);
3103     my $filename = "$dir/$vmid.fw";
3104
3105     my $empty_conf = {
3106         rules => [],
3107         options => {},
3108         aliases => {},
3109         ipset => {} ,
3110         ipset_comments => {},
3111     };
3112
3113     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3114     $vmfw_conf->{vmid} = $vmid;
3115
3116     return $vmfw_conf;
3117 }
3118
3119 my $format_rules = sub {
3120     my ($rules, $allow_iface) = @_;
3121
3122     my $raw = '';
3123
3124     foreach my $rule (@$rules) {
3125         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3126             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3127             $raw .= uc($rule->{type});
3128             if ($rule->{macro}) {
3129                 $raw .= " $rule->{macro}($rule->{action})";
3130             } else {
3131                 $raw .= " " . $rule->{action};
3132             }
3133             if ($allow_iface && $rule->{iface}) {
3134                 $raw .= " -i $rule->{iface}";
3135             }
3136
3137             if ($rule->{type} ne  'group')  {
3138                 $raw .= " -source $rule->{source}" if $rule->{source};
3139                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3140                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3141                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3142                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3143                 $raw .= " -log $rule->{log}" if $rule->{log};
3144             }
3145
3146             $raw .= " # " . encode('utf8', $rule->{comment})
3147                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3148             $raw .= "\n";
3149         } else {
3150             die "unknown rule type '$rule->{type}'";
3151         }
3152     }
3153
3154     return $raw;
3155 };
3156
3157 my $format_options = sub {
3158     my ($options) = @_;
3159
3160     my $raw = '';
3161
3162     $raw .= "[OPTIONS]\n\n";
3163     foreach my $opt (keys %$options) {
3164         $raw .= "$opt: $options->{$opt}\n";
3165     }
3166     $raw .= "\n";
3167
3168     return $raw;
3169 };
3170
3171 my $format_aliases = sub {
3172     my ($aliases) = @_;
3173
3174     my $raw = '';
3175
3176     $raw .= "[ALIASES]\n\n";
3177     foreach my $k (keys %$aliases) {
3178         my $e = $aliases->{$k};
3179         $raw .= "$e->{name} $e->{cidr}";
3180         $raw .= " # " . encode('utf8', $e->{comment})
3181             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3182         $raw .= "\n";
3183     }
3184     $raw .= "\n";
3185
3186     return $raw;
3187 };
3188
3189 my $format_ipsets = sub {
3190     my ($fw_conf) = @_;
3191
3192     my $raw = '';
3193
3194     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3195         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3196             my $utf8comment = encode('utf8', $comment);
3197             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3198         } else {
3199             $raw .= "[IPSET $ipset]\n\n";
3200         }
3201         my $options = $fw_conf->{ipset}->{$ipset};
3202
3203         my $nethash = {};
3204         foreach my $entry (@$options) {
3205             $nethash->{$entry->{cidr}} = $entry;
3206         }
3207
3208         foreach my $cidr (sort keys %$nethash) {
3209             my $entry = $nethash->{$cidr};
3210             my $line = $entry->{nomatch} ? '!' : '';
3211             $line .= $entry->{cidr};
3212             $line .= " # " . encode('utf8', $entry->{comment})
3213                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3214             $raw .= "$line\n";
3215         }
3216
3217         $raw .= "\n";
3218     }
3219
3220     return $raw;
3221 };
3222
3223 sub save_vmfw_conf {
3224     my ($vmid, $vmfw_conf) = @_;
3225
3226     my $raw = '';
3227
3228     my $options = $vmfw_conf->{options};
3229     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3230
3231     my $aliases = $vmfw_conf->{aliases};
3232     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3233
3234     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3235
3236     my $rules = $vmfw_conf->{rules} || [];
3237     if ($rules && scalar(@$rules)) {
3238         $raw .= "[RULES]\n\n";
3239         $raw .= &$format_rules($rules, 1);
3240         $raw .= "\n";
3241     }
3242
3243     my $filename = "$pvefw_conf_dir/$vmid.fw";
3244     if ($raw) {
3245         mkdir $pvefw_conf_dir;
3246         PVE::Tools::file_set_contents($filename, $raw);
3247     } else {
3248         unlink $filename;
3249     }
3250 }
3251
3252 sub remove_vmfw_conf {
3253     my ($vmid) = @_;
3254
3255     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3256
3257     unlink $vmfw_conffile;
3258 }
3259
3260 sub clone_vmfw_conf {
3261     my ($vmid, $newid) = @_;
3262
3263     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3264     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3265
3266     if (-f $clonevm_conffile) {
3267         unlink $clonevm_conffile;
3268     }
3269     if (-f $sourcevm_conffile) {
3270         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3271         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3272     }
3273 }
3274
3275 sub read_vm_firewall_configs {
3276     my ($cluster_conf, $vmdata, $dir) = @_;
3277
3278     my $vmfw_configs = {};
3279
3280     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3281         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3282         next if !$vmfw_conf->{options}; # skip if file does not exists
3283         $vmfw_configs->{$vmid} = $vmfw_conf;
3284     }
3285     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3286         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3287         next if !$vmfw_conf->{options}; # skip if file does not exists
3288         $vmfw_configs->{$vmid} = $vmfw_conf;
3289     }
3290
3291     return $vmfw_configs;
3292 }
3293
3294 sub get_option_log_level {
3295     my ($options, $k) = @_;
3296
3297     my $v = $options->{$k};
3298     $v = $default_log_level if !defined($v);
3299
3300     return undef if $v eq '' || $v eq 'nolog';
3301
3302     return $v if defined($log_level_hash->{$v});
3303
3304     warn "unknown log level ($k = '$v')\n";
3305
3306     return undef;
3307 }
3308
3309 sub generate_std_chains {
3310     my ($ruleset, $options, $ipversion) = @_;
3311
3312     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3313
3314     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3315     my $chain = 'PVEFW-smurflog';
3316     if ( $std_chains->{$chain} ) {
3317         foreach my $r (@{$std_chains->{$chain}}) {
3318           $r->{log} = $loglevel;
3319         }
3320     }
3321
3322     # same as shorewall logflags action.
3323     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3324     $chain = 'PVEFW-logflags';
3325     if ( $std_chains->{$chain} ) {
3326         foreach my $r (@{$std_chains->{$chain}}) {
3327           $r->{log} = $loglevel;
3328         }
3329     }
3330
3331     foreach my $chain (keys %$std_chains) {
3332         ruleset_create_chain($ruleset, $chain);
3333         foreach my $rule (@{$std_chains->{$chain}}) {
3334             if (ref($rule)) {
3335                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3336             } else {
3337                 die "rule $rule as string - should not happen";
3338             }
3339         }
3340     }
3341 }
3342
3343 sub generate_ipset_chains {
3344     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3345
3346     foreach my $ipset (keys %{$ipsets}) {
3347
3348         my $options = $ipsets->{$ipset};
3349
3350         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3351             if (my $ips = $device_ips->{$1}) {
3352                 $options = [@$options, @$ips];
3353             }
3354         }
3355
3356         # remove duplicates
3357         my $nethash = {};
3358         foreach my $entry (@$options) {
3359             next if $entry->{errors}; # skip entries with errors
3360             eval {
3361                 my ($cidr, $ver);
3362                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3363                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3364                 } else {
3365                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3366                 }
3367                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3368                 if ($ver == 6) {
3369                     # ip_compress_address takes an address only, no CIDR
3370                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3371                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3372                     $cidr .= $prefix_len if defined($prefix_len);
3373                     $cidr =~ s|/128$||;
3374                 } else {
3375                     $cidr =~ s|/32$||;
3376                 }
3377
3378                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3379             };
3380             warn $@ if $@;
3381         }
3382
3383         foreach my $ipversion (4, 6) {
3384             my $data = $nethash->{$ipversion};
3385
3386             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3387
3388             my $hashsize = scalar(@$options);
3389             if ($hashsize <= 64) {
3390                 $hashsize = 64;
3391             } else {
3392                 $hashsize = round_powerof2($hashsize);
3393             }
3394
3395             my $family = $ipversion == "6" ? "inet6" : "inet";
3396
3397             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3398
3399             foreach my $cidr (sort keys %$data) {
3400                 my $entry = $data->{$cidr};
3401
3402                 my $cmd = "add $name $cidr";
3403                 if ($entry->{nomatch}) {
3404                     if ($feature_ipset_nomatch) {
3405                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3406                     } else {
3407                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3408                     }
3409                 } else {
3410                     push @{$ipset_ruleset->{$name}}, $cmd;
3411                 }
3412             }
3413         }
3414     }
3415 }
3416
3417 sub round_powerof2 {
3418     my ($int) = @_;
3419
3420     $int--;
3421     $int |= $int >> $_ foreach (1,2,4,8,16);
3422     return ++$int;
3423 }
3424
3425 my $set_global_log_ratelimit = sub {
3426     my $cluster_opts = shift;
3427
3428     $global_log_ratelimit = '--limit 1/sec';
3429     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3430         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3431         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3432
3433         if ($limit->{enable}) {
3434             if (my $rate = $limit->{rate}) {
3435                 $global_log_ratelimit = "--limit $rate";
3436             }
3437             if (my $burst = $limit->{burst}) {
3438                 $global_log_ratelimit .= " --limit-burst $burst";
3439             }
3440         } else {
3441             $global_log_ratelimit = undef;
3442         }
3443     }
3444 };
3445
3446 sub load_clusterfw_conf {
3447     my ($filename) = @_;
3448
3449     $filename = $clusterfw_conf_filename if !defined($filename);
3450     my $empty_conf = {
3451         rules => [],
3452         options => {},
3453         aliases => {},
3454         groups => {},
3455         group_comments => {},
3456         ipset => {} ,
3457         ipset_comments => {},
3458     };
3459
3460     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3461     $set_global_log_ratelimit->($cluster_conf->{options});
3462
3463     return $cluster_conf;
3464 }
3465
3466 sub save_clusterfw_conf {
3467     my ($cluster_conf) = @_;
3468
3469     my $raw = '';
3470
3471     my $options = $cluster_conf->{options};
3472     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3473
3474     my $aliases = $cluster_conf->{aliases};
3475     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3476
3477     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3478
3479     my $rules = $cluster_conf->{rules};
3480     if ($rules && scalar(@$rules)) {
3481         $raw .= "[RULES]\n\n";
3482         $raw .= &$format_rules($rules, 1);
3483         $raw .= "\n";
3484     }
3485
3486     if ($cluster_conf->{groups}) {
3487         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3488             my $rules = $cluster_conf->{groups}->{$group};
3489             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3490                 my $utf8comment = encode('utf8', $comment);
3491                 $raw .= "[group $group] # $utf8comment\n\n";
3492             } else {
3493                 $raw .= "[group $group]\n\n";
3494             }
3495
3496             $raw .= &$format_rules($rules, 0);
3497             $raw .= "\n";
3498         }
3499     }
3500
3501     if ($raw) {
3502         mkdir $pvefw_conf_dir;
3503         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3504     } else {
3505         unlink $clusterfw_conf_filename;
3506     }
3507 }
3508
3509 sub load_hostfw_conf {
3510     my ($cluster_conf, $filename) = @_;
3511
3512     $filename = $hostfw_conf_filename if !defined($filename);
3513
3514     my $empty_conf = { rules => [], options => {}};
3515     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3516 }
3517
3518 sub save_hostfw_conf {
3519     my ($hostfw_conf) = @_;
3520
3521     my $raw = '';
3522
3523     my $options = $hostfw_conf->{options};
3524     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3525
3526     my $rules = $hostfw_conf->{rules};
3527     if ($rules && scalar(@$rules)) {
3528         $raw .= "[RULES]\n\n";
3529         $raw .= &$format_rules($rules, 1);
3530         $raw .= "\n";
3531     }
3532
3533     if ($raw) {
3534         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3535     } else {
3536         unlink $hostfw_conf_filename;
3537     }
3538 }
3539
3540 sub compile {
3541     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3542
3543     my $vmfw_configs;
3544
3545     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3546     $pve_std_chains = dclone($pve_std_chains_conf);
3547
3548     if ($vmdata) { # test mode
3549         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3550         my $filename = "$testdir/cluster.fw";
3551         $cluster_conf = load_clusterfw_conf($filename);
3552
3553         $filename = "$testdir/host.fw";
3554         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3555
3556         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3557     } else { # normal operation
3558         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3559
3560         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3561
3562         # cfs_update is handled by daemon or API
3563         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3564             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3565
3566         $vmdata = read_local_vm_config();
3567         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3568     }
3569
3570     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3571
3572     my $localnet;
3573     if ($cluster_conf->{aliases}->{local_network}) {
3574         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3575     } else {
3576         my $localnet_ver;
3577         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3578
3579         $cluster_conf->{aliases}->{local_network} = {
3580             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3581     }
3582
3583     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3584
3585     my $ruleset = {};
3586     my $rulesetv6 = {};
3587     $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3588     $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3589     $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3590     $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3591     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3592     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3593
3594     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3595 }
3596
3597 sub compile_iptables_raw {
3598     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3599
3600     my $ruleset = {};
3601
3602     my $hostfw_options = $hostfw_conf->{options} || {};
3603     my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
3604
3605     if($protection_synflood) {
3606
3607         my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
3608         my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
3609         my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
3610         my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
3611         $protection_synflood_expire = $protection_synflood_expire * 1000;
3612         my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
3613
3614         ruleset_create_chain($ruleset, "PVEFW-PREROUTING");
3615         ruleset_addrule($ruleset, "PVEFW-PREROUTING", "-p tcp -m tcp --tcp-flags FIN,SYN,RST,ACK SYN -m hashlimit --hashlimit-above $protection_synflood_rate/sec --hashlimit-burst $protection_synflood_burst --hashlimit-mode srcip --hashlimit-name syn --hashlimit-htable-size 2097152 --hashlimit-srcmask $protection_synflood_mask --hashlimit-htable-expire $protection_synflood_expire", "-j DROP");
3616     }
3617
3618     return $ruleset;
3619 }
3620
3621 sub compile_iptables_filter {
3622     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3623
3624     my $ruleset = {};
3625
3626     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3627     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3628
3629     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3630
3631     my $hostfw_options = $hostfw_conf->{options} || {};
3632
3633     # fixme: what log level should we use here?
3634     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3635
3636     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3637     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3638
3639     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3640     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3641
3642     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3643
3644     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3645     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3646
3647     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3648
3649     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3650
3651     if ($hostfw_enable) {
3652         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3653         warn $@ if $@; # just to be sure - should not happen
3654     }
3655
3656     # generate firewall rules for QEMU VMs
3657     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3658         eval {
3659             my $conf = $vmdata->{qemu}->{$vmid};
3660             my $vmfw_conf = $vmfw_configs->{$vmid};
3661             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3662
3663             foreach my $netid (sort keys %$conf) {
3664                 next if $netid !~ m/^net(\d+)$/;
3665                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3666                 next if !$net->{firewall};
3667
3668                 my $iface = "tap${vmid}i$1";
3669                 my $macaddr = $net->{macaddr};
3670                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3671                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3672                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3673                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3674             }
3675         };
3676         warn $@ if $@; # just to be sure - should not happen
3677     }
3678
3679     # generate firewall rules for LXC containers
3680     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3681         eval {
3682             my $conf = $vmdata->{lxc}->{$vmid};
3683             my $vmfw_conf = $vmfw_configs->{$vmid};
3684             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3685
3686             foreach my $netid (sort keys %$conf) {
3687                 next if $netid !~ m/^net(\d+)$/;
3688                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3689                 next if !$net->{firewall};
3690
3691                 my $iface = "veth${vmid}i$1";
3692                 my $macaddr = $net->{hwaddr};
3693                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3694                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3695                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3696                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3697             }
3698         };
3699         warn $@ if $@; # just to be sure - should not happen
3700     }
3701
3702     if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3703         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3704     }
3705
3706     return $ruleset;
3707 }
3708
3709 sub mac_to_linklocal {
3710     my ($macaddr) = @_;
3711     my @parts = split(/:/, $macaddr);
3712     # The standard link local address uses the fe80::/64 prefix with the
3713     # modified EUI-64 identifier derived from the MAC address by flipping the
3714     # universal/local bit and inserting FF:FE in the middle.
3715     # See RFC 4291.
3716     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3717     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3718     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3719 }
3720
3721 sub compile_ipsets {
3722     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3723
3724     my $localnet;
3725     if ($cluster_conf->{aliases}->{local_network}) {
3726         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3727     } else {
3728         my $localnet_ver;
3729         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3730
3731         $cluster_conf->{aliases}->{local_network} = {
3732             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3733     }
3734
3735     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3736
3737
3738     my $ipset_ruleset = {};
3739
3740     # generate ipsets for QEMU VMs
3741     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3742         eval {
3743             my $conf = $vmdata->{qemu}->{$vmid};
3744             my $vmfw_conf = $vmfw_configs->{$vmid};
3745             return if !$vmfw_conf;
3746
3747             # When the 'ipfilter' option is enabled every device for which there
3748             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3749             # ipset.
3750             # The reason is that ipfilter ipsets are always filled with standard
3751             # IPv6 link-local filters.
3752             my $ipsets = $vmfw_conf->{ipset};
3753             my $implicit_sets = {};
3754
3755             my $device_ips = {};
3756             foreach my $netid (keys %$conf) {
3757                 next if $netid !~ m/^net(\d+)$/;
3758                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3759                 next if !$net->{firewall};
3760
3761                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3762                     $implicit_sets->{"ipfilter-$netid"} = [];
3763                 }
3764
3765                 my $macaddr = $net->{macaddr};
3766                 my $linklocal = mac_to_linklocal($macaddr);
3767                 $device_ips->{$netid} = [
3768                     { cidr => $linklocal },
3769                     { cidr => 'fe80::/10', nomatch => 1 }
3770                 ];
3771             }
3772
3773             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3774             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3775         };
3776         warn $@ if $@; # just to be sure - should not happen
3777     }
3778
3779     # generate firewall rules for LXC containers
3780     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3781         eval {
3782             my $conf = $vmdata->{lxc}->{$vmid};
3783             my $vmfw_conf = $vmfw_configs->{$vmid};
3784             return if !$vmfw_conf;
3785
3786             # When the 'ipfilter' option is enabled every device for which there
3787             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3788             # ipset.
3789             # The reason is that ipfilter ipsets are always filled with standard
3790             # IPv6 link-local filters, as well as the IP addresses configured
3791             # for the container.
3792             my $ipsets = $vmfw_conf->{ipset};
3793             my $implicit_sets = {};
3794
3795             my $device_ips = {};
3796             foreach my $netid (keys %$conf) {
3797                 next if $netid !~ m/^net(\d+)$/;
3798                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3799                 next if !$net->{firewall};
3800
3801                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3802                     $implicit_sets->{"ipfilter-$netid"} = [];
3803                 }
3804
3805                 my $macaddr = $net->{hwaddr};
3806                 my $linklocal = mac_to_linklocal($macaddr);
3807                 my $set = $device_ips->{$netid} = [
3808                     { cidr => $linklocal },
3809                     { cidr => 'fe80::/10', nomatch => 1 }
3810                 ];
3811                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3812                     push @$set, { cidr => $1 };
3813                 }
3814                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3815                     push @$set, { cidr => $1 };
3816                 }
3817             }
3818
3819             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3820             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3821         };
3822         warn $@ if $@; # just to be sure - should not happen
3823     }
3824
3825     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3826
3827     return $ipset_ruleset;
3828 }
3829
3830 sub compile_ebtables_filter {
3831     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3832
3833     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3834         return {};
3835     }
3836
3837     my $ruleset = {};
3838
3839     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3840
3841     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3842     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3843     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3844     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3845     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3846
3847     # generate firewall rules for QEMU VMs
3848     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3849         eval {
3850             my $conf = $vmdata->{qemu}->{$vmid};
3851             my $vmfw_conf = $vmfw_configs->{$vmid};
3852             return if !$vmfw_conf;
3853             my $ipsets = $vmfw_conf->{ipset};
3854
3855             foreach my $netid (sort keys %$conf) {
3856                 next if $netid !~ m/^net(\d+)$/;
3857                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3858                 next if !$net->{firewall};
3859                 my $iface = "tap${vmid}i$1";
3860                 my $macaddr = $net->{macaddr};
3861                 my $arpfilter = [];
3862                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3863                     foreach my $ipaddr (@$ipset) {
3864                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3865                         next if !$ip || ($version && $version != 4);
3866                         push(@$arpfilter, $ip);
3867                     }
3868                 }
3869                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3870             }
3871         };
3872         warn $@ if $@; # just to be sure - should not happen
3873     }
3874
3875     # generate firewall rules for LXC containers
3876     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3877         eval {
3878             my $conf = $vmdata->{lxc}->{$vmid};
3879
3880             my $vmfw_conf = $vmfw_configs->{$vmid};
3881             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3882             my $ipsets = $vmfw_conf->{ipset};
3883
3884             foreach my $netid (sort keys %$conf) {
3885                 next if $netid !~ m/^net(\d+)$/;
3886                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3887                 next if !$net->{firewall};
3888                 my $iface = "veth${vmid}i$1";
3889                 my $macaddr = $net->{hwaddr};
3890                 my $arpfilter = [];
3891                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3892                     foreach my $ipaddr (@$ipset) {
3893                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3894                         next if !$ip || ($version && $version != 4);
3895                         push(@$arpfilter, $ip);
3896                     }
3897                 }
3898                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3899                     # ebtables changes this to a .0/MASK network but we just
3900                     # want the address here, no network - see #2193
3901                     $ip =~ s|/(\d+)$||;
3902                     push @$arpfilter, $ip;
3903                 }
3904                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3905             }
3906         };
3907         warn $@ if $@; # just to be sure - should not happen
3908     }
3909
3910     return $ruleset;
3911 }
3912
3913 sub generate_tap_layer2filter {
3914     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3915     my $options = $vmfw_conf->{options};
3916
3917     my $tapchain = $iface."-OUT";
3918
3919     # ebtables remove zeros from mac pairs
3920     $macaddr =~ s/0([0-9a-f])/$1/ig;
3921     $macaddr = lc($macaddr);
3922
3923     ruleset_create_chain($ruleset, $tapchain);
3924
3925     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3926             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3927     }
3928
3929     if (@$arpfilter){
3930         my $arpchain = $tapchain."-ARP";
3931         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3932         ruleset_create_chain($ruleset, $arpchain);
3933
3934         foreach my $ip (@{$arpfilter}) {
3935             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
3936         }
3937         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
3938     }
3939
3940     if (defined($options->{layer2_protocols})){
3941         my $protochain = $tapchain."-PROTO";
3942         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
3943         ruleset_create_chain($ruleset, $protochain);
3944
3945         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
3946             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
3947         }
3948         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
3949     }
3950
3951     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
3952
3953     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
3954 }
3955
3956 # the parameter $change_only_regex changes two things if defined:
3957 # * all chains not matching it will be left intact
3958 # * both the $active_chains hash and the returned status_hash have different
3959 #   structure (they contain a key named 'rules').
3960 sub get_ruleset_status {
3961     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
3962
3963     my $statushash = {};
3964
3965     foreach my $chain (sort keys %$ruleset) {
3966         my $rules = $ruleset->{$chain};
3967         my $sig = &$digest_fn($rules);
3968         my $oldsig;
3969
3970         $statushash->{$chain}->{sig} = $sig;
3971         if (defined($change_only_regex)) {
3972             $oldsig = $active_chains->{$chain}->{sig};
3973             $statushash->{$chain}->{rules} = $rules;
3974         } else {
3975             $oldsig = $active_chains->{$chain};
3976         }
3977         if (!defined($oldsig)) {
3978             $statushash->{$chain}->{action} = 'create';
3979         } else {
3980             if ($oldsig eq $sig) {
3981                 $statushash->{$chain}->{action} = 'exists';
3982             } else {
3983                 $statushash->{$chain}->{action} = 'update';
3984             }
3985         }
3986         if ($verbose) {
3987             print "$statushash->{$chain}->{action} $chain ($sig)\n";
3988             foreach my $cmd (@{$rules}) {
3989                 print "\t$cmd\n";
3990             }
3991         }
3992     }
3993
3994     foreach my $chain (sort keys %$active_chains) {
3995         next if defined($ruleset->{$chain});
3996         my $action = 'delete';
3997         my $sig = $active_chains->{$chain};
3998         if (defined($change_only_regex)) {
3999             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4000             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
4001             $sig = $sig->{sig};
4002         }
4003         $statushash->{$chain}->{action} = $action;
4004         $statushash->{$chain}->{sig} = $sig;
4005         print "$action $chain ($sig)\n" if $verbose;
4006     }
4007
4008     return $statushash;
4009 }
4010
4011 sub print_sig_rule {
4012     my ($chain, $sig) = @_;
4013
4014     # We just use this to store a SHA1 checksum used to detect changes
4015     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4016 }
4017
4018 sub get_ruleset_cmdlist {
4019     my ($ruleset, $iptablescmd, $table) = @_;
4020
4021     $table = 'filter' if !$table;
4022
4023     my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4024
4025     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4026     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4027
4028     # create missing chains first
4029     foreach my $chain (sort keys %$ruleset) {
4030         my $stat = $statushash->{$chain};
4031         die "internal error" if !$stat;
4032         next if $stat->{action} ne 'create';
4033
4034         $cmdlist .= ":$chain - [0:0]\n";
4035     }
4036
4037     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4038         my $chain = "PVEFW-$h";
4039         if ($ruleset->{$chain} && !$hooks->{$h}) {
4040             $cmdlist .= "-A $h -j $chain\n";
4041         }
4042     }
4043
4044     foreach my $chain (sort keys %$ruleset) {
4045         my $stat = $statushash->{$chain};
4046         die "internal error" if !$stat;
4047
4048         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4049             $cmdlist .= "-F $chain\n";
4050             foreach my $cmd (@{$ruleset->{$chain}}) {
4051                 $cmdlist .= "$cmd\n";
4052             }
4053             $cmdlist .= print_sig_rule($chain, $stat->{sig});
4054         } elsif ($stat->{action} eq 'delete') {
4055             die "internal error"; # this should not happen
4056         } elsif ($stat->{action} eq 'exists') {
4057             # do nothing
4058         } else {
4059             die "internal error - unknown status '$stat->{action}'";
4060         }
4061     }
4062
4063     foreach my $chain (keys %$statushash) {
4064         next if $statushash->{$chain}->{action} ne 'delete';
4065         $cmdlist .= "-F $chain\n";
4066     }
4067     foreach my $chain (keys %$statushash) {
4068         next if $statushash->{$chain}->{action} ne 'delete';
4069         next if $chain eq 'PVEFW-INPUT';
4070         next if $chain eq 'PVEFW-OUTPUT';
4071         next if $chain eq 'PVEFW-FORWARD';
4072         next if $chain eq 'PVEFW-PREROUTING';
4073         $cmdlist .= "-X $chain\n";
4074     }
4075
4076     my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4077
4078     $cmdlist .= "COMMIT\n";
4079
4080     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4081 }
4082
4083 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4084
4085 sub get_ebtables_cmdlist {
4086     my ($ruleset) = @_;
4087
4088     my $changes = 0;
4089     my $cmdlist = "*filter\n";
4090
4091     my $active_chains = ebtables_get_chains();
4092     my $statushash = get_ruleset_status($ruleset, $active_chains,
4093                                         \&iptables_chain_digest,
4094                                         $pve_ebtables_chainname_regex);
4095
4096     # create chains first and make sure PVE rules are evaluated if active
4097     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4098     my $pve_include = 0;
4099     foreach my $chain (sort keys %$statushash) {
4100         next if ($statushash->{$chain}->{action} eq 'delete');
4101         $cmdlist .= ":$chain ACCEPT\n";
4102         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4103     }
4104
4105     foreach my $chain (sort keys %$statushash) {
4106         my $stat = $statushash->{$chain};
4107         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4108         next if ($stat->{action} eq 'delete');
4109
4110         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4111             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4112                 next if ! $pve_include;
4113                 $pve_include = 0;
4114             }
4115             $cmdlist .= "$cmd\n";
4116         }
4117     }
4118     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4119
4120     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4121 }
4122
4123 sub get_ipset_cmdlist {
4124     my ($ruleset) = @_;
4125
4126     my $cmdlist = "";
4127
4128     my $delete_cmdlist = "";
4129
4130     my $active_chains = ipset_get_chains();
4131     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4132
4133     # remove stale _swap chains
4134     foreach my $chain (keys %$active_chains) {
4135         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4136             $cmdlist .= "destroy $chain\n";
4137         }
4138     }
4139
4140     foreach my $chain (keys %$ruleset) {
4141         my $stat = $statushash->{$chain};
4142         die "internal error" if !$stat;
4143
4144         if ($stat->{action} eq 'create') {
4145             foreach my $cmd (@{$ruleset->{$chain}}) {
4146                 $cmdlist .= "$cmd\n";
4147             }
4148         }
4149     }
4150
4151     foreach my $chain (keys %$ruleset) {
4152         my $stat = $statushash->{$chain};
4153         die "internal error" if !$stat;
4154
4155         if ($stat->{action} eq 'update') {
4156             my $chain_swap = $chain."_swap";
4157
4158             foreach my $cmd (@{$ruleset->{$chain}}) {
4159                 $cmd =~ s/$chain/$chain_swap/;
4160                 $cmdlist .= "$cmd\n";
4161             }
4162             $cmdlist .= "swap $chain_swap $chain\n";
4163             $cmdlist .= "flush $chain_swap\n";
4164             $cmdlist .= "destroy $chain_swap\n";
4165         }
4166     }
4167
4168      # the remove unused chains
4169     foreach my $chain (keys %$statushash) {
4170         next if $statushash->{$chain}->{action} ne 'delete';
4171
4172         $delete_cmdlist .= "flush $chain\n";
4173         $delete_cmdlist .= "destroy $chain\n";
4174     }
4175
4176     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4177
4178     return ($cmdlist, $delete_cmdlist, $changes);
4179 }
4180
4181 sub apply_ruleset {
4182     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4183
4184     enable_bridge_firewall();
4185
4186     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4187         get_ipset_cmdlist($ipset_ruleset);
4188
4189     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4190     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
4191     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4192     my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4193     my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
4194
4195     if ($verbose) {
4196         if ($ipset_changes) {
4197             print "ipset changes:\n";
4198             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4199             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4200         }
4201
4202         if ($changes) {
4203             print "iptables changes:\n";
4204             print $cmdlist;
4205         }
4206
4207         if ($changesv6) {
4208             print "ip6tables changes:\n";
4209             print $cmdlistv6;
4210         }
4211
4212         if ($changes_raw) {
4213             print "iptables table raw changes:\n";
4214             print $cmdlist_raw;
4215         }
4216
4217         if ($changesv6_raw) {
4218             print "ip6tables table raw changes:\n";
4219             print $cmdlistv6_raw;
4220         }
4221
4222         if ($ebtables_changes) {
4223             print "ebtables changes:\n";
4224             print $ebtables_cmdlist;
4225         }
4226     }
4227
4228     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4229     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4230
4231     ipset_restore_cmdlist($ipset_create_cmdlist);
4232
4233     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4234     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4235
4236     iptables_restore_cmdlist($cmdlist);
4237
4238     $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4239     PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4240
4241     iptables_restore_cmdlist($cmdlist_raw, 'raw');
4242
4243     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4244     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4245
4246     ip6tables_restore_cmdlist($cmdlistv6);
4247
4248     $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4249     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4250
4251     ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4252
4253     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4254     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4255
4256     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4257
4258     ebtables_restore_cmdlist($ebtables_cmdlist);
4259
4260     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4261     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4262
4263     # test: re-read status and check if everything is up to date
4264     my $ruleset_filter = $ruleset->{filter};
4265     my $active_chains = iptables_get_chains();
4266     my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
4267
4268     my $errors;
4269     foreach my $chain (sort keys %$ruleset_filter) {
4270         my $stat = $statushash->{$chain};
4271         if ($stat->{action} ne 'exists') {
4272             warn "unable to update chain '$chain'\n";
4273             $errors = 1;
4274         }
4275     }
4276
4277     my $rulesetv6_filter = $rulesetv6->{filter};
4278     my $active_chainsv6 = iptables_get_chains("ip6tables");
4279     my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
4280
4281     foreach my $chain (sort keys %$rulesetv6_filter) {
4282         my $stat = $statushashv6->{$chain};
4283         if ($stat->{action} ne 'exists') {
4284             warn "unable to update chain '$chain'\n";
4285             $errors = 1;
4286         }
4287     }
4288
4289     my $ruleset_raw = $ruleset->{raw};
4290     my $active_chains_raw = iptables_get_chains(undef, 'raw');
4291     my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4292
4293     foreach my $chain (sort keys %$ruleset_raw) {
4294         my $stat = $statushash_raw->{$chain};
4295         if ($stat->{action} ne 'exists') {
4296             warn "unable to update chain '$chain'\n";
4297             $errors = 1;
4298         }
4299     }
4300
4301     my $rulesetv6_raw = $rulesetv6->{raw};
4302     my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4303     my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4304
4305     foreach my $chain (sort keys %$rulesetv6_raw) {
4306         my $stat = $statushashv6_raw->{$chain};
4307         if ($stat->{action} ne 'exists') {
4308             warn "unable to update chain '$chain'\n";
4309             $errors = 1;
4310         }
4311     }
4312
4313     my $active_ebtables_chains = ebtables_get_chains();
4314     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4315                                 $active_ebtables_chains, \&iptables_chain_digest,
4316                                 $pve_ebtables_chainname_regex);
4317
4318     foreach my $chain (sort keys %$ebtables_ruleset) {
4319         my $stat = $ebtables_statushash->{$chain};
4320         if ($stat->{action} ne 'exists') {
4321             warn "ebtables : unable to update chain '$chain'\n";
4322             $errors = 1;
4323         }
4324     }
4325
4326     die "unable to apply firewall changes\n" if $errors;
4327
4328     update_nf_conntrack_max($hostfw_conf);
4329
4330     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4331
4332     update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf);
4333
4334     update_nf_conntrack_logging($hostfw_conf);
4335 }
4336
4337 sub update_nf_conntrack_max {
4338     my ($hostfw_conf) = @_;
4339
4340     my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4341
4342     my $options = $hostfw_conf->{options} || {};
4343
4344     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4345         $max = $options->{nf_conntrack_max};
4346         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4347     }
4348
4349     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4350     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4351
4352     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4353
4354     if ($current != $max) {
4355         my $hashsize = int($max/4);
4356         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4357         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4358     }
4359 }
4360
4361 sub update_nf_conntrack_tcp_timeout_established {
4362     my ($hostfw_conf) = @_;
4363
4364     my $options = $hostfw_conf->{options} || {};
4365
4366     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4367
4368     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4369 }
4370
4371 sub update_nf_conntrack_tcp_timeout_syn_recv {
4372     my ($hostfw_conf) = @_;
4373
4374     my $options = $hostfw_conf->{options} || {};
4375
4376     my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60;
4377
4378     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4379 }
4380
4381 my $log_nf_conntrack_enabled = undef;
4382 sub update_nf_conntrack_logging {
4383     my ($hostfw_conf) = @_;
4384
4385     my $options = $hostfw_conf->{options} || {};
4386     my $value = $options->{log_nf_conntrack} || 0;
4387     if (!defined($log_nf_conntrack_enabled)
4388         || $value != $log_nf_conntrack_enabled)
4389     {
4390         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4391         PVE::Tools::file_set_contents($tmpfile, $value);
4392
4393         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4394         $log_nf_conntrack_enabled = $value;
4395     }
4396 }
4397
4398 sub remove_pvefw_chains {
4399
4400     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4401     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4402     PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4403     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
4404     PVE::Firewall::remove_pvefw_chains_ipset();
4405     PVE::Firewall::remove_pvefw_chains_ebtables();
4406
4407 }
4408
4409 sub remove_pvefw_chains_iptables {
4410     my ($iptablescmd, $table) = @_;
4411
4412     $table = 'filter' if !$table;
4413
4414     my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4415     my $cmdlist = "*$table\n";
4416
4417     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4418         if ($hooks->{$h}) {
4419             $cmdlist .= "-D $h -j PVEFW-$h\n";
4420         }
4421     }
4422
4423     foreach my $chain (keys %$chash) {
4424         $cmdlist .= "-F $chain\n";
4425     }
4426
4427     foreach my $chain (keys %$chash) {
4428         $cmdlist .= "-X $chain\n";
4429     }
4430     $cmdlist .= "COMMIT\n";
4431
4432     if($iptablescmd eq "ip6tables") {
4433         ip6tables_restore_cmdlist($cmdlist, $table);
4434     } else {
4435         iptables_restore_cmdlist($cmdlist, $table);
4436     }
4437 }
4438
4439 sub remove_pvefw_chains_ipset {
4440
4441     my $ipset_chains = ipset_get_chains();
4442
4443     my $cmdlist = "";
4444
4445     foreach my $chain (keys %$ipset_chains) {
4446         $cmdlist .= "flush $chain\n";
4447         $cmdlist .= "destroy $chain\n";
4448     }
4449
4450     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4451 }
4452
4453 sub remove_pvefw_chains_ebtables {
4454     # apply empty ruleset = remove all our chains
4455     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4456 }
4457
4458 sub init {
4459     my $cluster_conf = load_clusterfw_conf();
4460     my $cluster_options = $cluster_conf->{options};
4461     my $enable = $cluster_options->{enable};
4462
4463     return if !$enable;
4464
4465     # load required modules here
4466 }
4467
4468 sub update {
4469     my $code = sub {
4470
4471         my $cluster_conf = load_clusterfw_conf();
4472         my $cluster_options = $cluster_conf->{options};
4473
4474         if (!$cluster_options->{enable}) {
4475             PVE::Firewall::remove_pvefw_chains();
4476             return;
4477         }
4478
4479         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4480
4481         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4482
4483         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4484     };
4485
4486     run_locked($code);
4487 }
4488
4489 1;