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