src/PVE/Firewall.pm

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