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 ($line =~ m/^:(\S+)\s\S+$/) {
1948             # Make sure we know chains exist even if they're empty.
1949             $chains->{$1} //= [];
1950         } elsif ($line =~ m/^(?:\S+)\s(\S+)\s(?:\S+).*/) {
1951             my $chain = $1;
1952             $line =~ s/\s+$//;
1953             push @{$chains->{$chain}}, $line;
1954         } else {
1955             # simply ignore the rest
1956             return;
1957         }
1958     };
1959
1960     run_command(['ebtables-save'], outfunc => $parser);
1961     # compute digest for each chain and store rules as well
1962     foreach my $chain (keys %$chains) {
1963         $res->{$chain}->{rules} = $chains->{$chain};
1964         $res->{$chain}->{sig} = iptables_chain_digest($chains->{$chain});
1965     }
1966     return $res;
1967 }
1968
1969 # substitude action of rule according to action hash
1970 sub rule_substitude_action {
1971     my ($rule, $actions) = @_;
1972
1973     if (my $action = $rule->{action}) {
1974         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1975     }
1976 }
1977
1978 # generate a src or dst match
1979 # $dir(ection) is either d or s
1980 sub ipt_gen_src_or_dst_match {
1981     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1982
1983     my $srcdst;
1984     if ($dir eq 's') {
1985         $srcdst = "src";
1986     } elsif ($dir eq 'd') {
1987         $srcdst = "dst";
1988     } else {
1989         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1990     }
1991
1992     my $match;
1993     if ($adr =~ m/^\+/) {
1994         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1995             my $name = $1;
1996             my $ipset_chain;
1997             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1998                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1999             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
2000                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
2001             } else {
2002                 die "no such ipset '$name'\n";
2003             }
2004             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
2005         } else {
2006             die "invalid security group name '$adr'\n";
2007         }
2008     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
2009         my $alias = lc($adr);
2010         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2011         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
2012         die "no such alias '$adr'\n" if !$e;
2013         $match = "-${dir} $e->{cidr}";
2014     } elsif ($adr =~ m/\-/){
2015         $match = "-m iprange --${srcdst}-range $adr";
2016     } else {
2017         $match = "-${dir} $adr";
2018     }
2019
2020     return $match;
2021 }
2022
2023 # convert a %rule to an array of iptables commands
2024 sub ipt_rule_to_cmds {
2025     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
2026
2027     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
2028
2029     my @match = ();
2030
2031     if (defined $rule->{match}) {
2032         push @match, $rule->{match};
2033     } else {
2034         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
2035         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
2036
2037         if ($rule->{source}) {
2038             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
2039         }
2040         if ($rule->{dest}) {
2041             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
2042         }
2043
2044         if (my $proto = $rule->{proto}) {
2045             push @match, "-p $proto";
2046
2047             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
2048             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
2049
2050             my $add_dport = sub {
2051                 return if !defined($rule->{dport});
2052
2053                 # NOTE: we re-use dport to store --icmp-type for icmp* protocol
2054                 if ($proto eq 'icmp') {
2055                     $is_valid_icmp_type->($rule->{dport}, $icmp_type_names);
2056                     push @match, "-m icmp --icmp-type $rule->{dport}";
2057                 } elsif ($proto eq 'icmpv6') {
2058                     $is_valid_icmp_type->($rule->{dport}, $icmpv6_type_names);
2059                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
2060                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
2061                     die "protocol $proto does not have ports\n";
2062                 } elsif ($multidport) {
2063                     push @match, "--match multiport", "--dports $rule->{dport}";
2064                 } else {
2065                     return if !$rule->{dport};
2066                     push @match, "--dport $rule->{dport}";
2067                 }
2068             };
2069
2070             my $add_sport = sub {
2071                 return if !$rule->{sport};
2072
2073                 die "protocol $proto does not have ports\n"
2074                     if !$PROTOCOLS_WITH_PORTS->{$proto};
2075                 if ($multisport) {
2076                     push @match, "--match multiport", "--sports $rule->{sport}";
2077                 } else {
2078                     push @match, "--sport $rule->{sport}";
2079                 }
2080             };
2081
2082             # order matters - single port before multiport!
2083             $add_dport->() if $multisport;
2084             $add_sport->();
2085             $add_dport->() if !$multisport;
2086         } elsif ($rule->{dport} || $rule->{sport}) {
2087             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
2088             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
2089         }
2090
2091         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
2092     }
2093     my $matchstr = scalar(@match) ? join(' ', @match) : "";
2094
2095     my $targetstr;
2096     if (defined $rule->{target}) {
2097         $targetstr = $rule->{target};
2098     } else {
2099         my $action = (defined $rule->{action}) ? $rule->{action} : "";
2100         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
2101         $targetstr = ($goto) ? "-g $action" : "-j $action";
2102     }
2103
2104     my @iptcmds;
2105     my $log = $rule->{log};
2106     if (defined($log) && $log ne 'nolog') {
2107         my $loglevel = $log_level_hash->{$log};
2108         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $loglevel);
2109         push @iptcmds, "-A $chain $matchstr $logaction";
2110     }
2111     push @iptcmds, "-A $chain $matchstr $targetstr";
2112     return @iptcmds;
2113 }
2114
2115 sub ruleset_generate_rule {
2116     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf, $vmid) = @_;
2117
2118     my $rules;
2119
2120     if ($rule->{macro}) {
2121         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
2122     } else {
2123         $rules = [ $rule ];
2124     }
2125
2126     # update all or nothing
2127     my @ipt_rule_cmds;
2128     foreach my $r (@$rules) {
2129         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid);
2130     }
2131     foreach my $c (@ipt_rule_cmds) {
2132         ruleset_add_ipt_cmd($ruleset, $chain, $c);
2133     }
2134 }
2135
2136 sub ruleset_create_chain {
2137     my ($ruleset, $chain) = @_;
2138
2139     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
2140     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
2141
2142     die "chain '$chain' already exists\n" if $ruleset->{$chain};
2143
2144     $ruleset->{$chain} = [];
2145 }
2146
2147 sub ruleset_chain_exist {
2148     my ($ruleset, $chain) = @_;
2149
2150     return $ruleset->{$chain} ? 1 : undef;
2151 }
2152
2153 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
2154 sub ruleset_add_ipt_cmd {
2155    my ($ruleset, $chain, $iptcmd) = @_;
2156
2157    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2158
2159    push @{$ruleset->{$chain}}, $iptcmd;
2160 }
2161
2162 sub ruleset_addrule {
2163     my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2164
2165     die "no such chain '$chain'\n" if !$ruleset->{$chain};
2166
2167     if ($log) {
2168         my $loglevel = $log_level_hash->{$log};
2169         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $loglevel);
2170         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2171     }
2172     # for stable ebtables digests avoid double-spaces to match ebtables-save output
2173     $match .= ' ' if length($match);
2174     push @{$ruleset->{$chain}}, "-A $chain ${match}$action";
2175 }
2176
2177 sub ruleset_insertrule {
2178    my ($ruleset, $chain, $match, $action, $log) = @_;
2179
2180    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2181
2182    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2183 }
2184
2185 sub get_log_rule_base {
2186     my ($chain, $vmid, $msg, $loglevel) = @_;
2187
2188     $vmid = 0 if !defined($vmid);
2189     $msg = "" if !defined($msg);
2190
2191     my $rlimit = '';
2192     if (defined($global_log_ratelimit)) {
2193         $rlimit = "-m limit $global_log_ratelimit ";
2194     }
2195
2196     # Note: we use special format for prefix to pass further
2197     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2198     return "${rlimit}-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2199 }
2200
2201 sub ruleset_add_chain_policy {
2202     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2203
2204     if ($policy eq 'ACCEPT') {
2205
2206         my $rule = { action => 'ACCEPT' };
2207         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2208         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2209
2210     } elsif ($policy eq 'DROP') {
2211
2212         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2213
2214         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2215     } elsif ($policy eq 'REJECT') {
2216         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2217
2218         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy: ", $vmid);
2219     } else {
2220         # should not happen
2221         die "internal error: unknown policy '$policy'";
2222     }
2223 }
2224
2225 sub ruleset_chain_add_ndp {
2226     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2227     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2228
2229     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2230     if ($direction ne 'OUT' || $options->{radv}) {
2231         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2232     }
2233     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2234     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2235 }
2236
2237 sub ruleset_chain_add_conn_filters {
2238     my ($ruleset, $chain, $allow_invalid, $accept) = @_;
2239
2240     if (!$allow_invalid) {
2241         ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2242     }
2243     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2244 }
2245
2246 sub ruleset_chain_add_input_filters {
2247     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2248
2249     if ($cluster_conf->{ipset}->{blacklist}){
2250         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2251             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2252             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ", 0);
2253         }
2254         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2255         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2256     }
2257
2258     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2259         if ($ipversion == 4) {
2260             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2261         }
2262     }
2263
2264     if ($options->{tcpflags}) {
2265         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2266     }
2267 }
2268
2269 sub ruleset_create_vm_chain {
2270     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2271
2272     ruleset_create_chain($ruleset, $chain);
2273     my $accept = generate_nfqueue($options);
2274
2275     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2276         if ($ipversion == 4) {
2277             if ($direction eq 'OUT') {
2278                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2279                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2280                                         proto => 'udp', sport => 68, dport => 67 });
2281             } else {
2282                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2283                                       { action => 'ACCEPT',
2284                                         proto => 'udp', sport => 67, dport => 68 });
2285             }
2286         } elsif ($ipversion == 6) {
2287             if ($direction eq 'OUT') {
2288                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2289                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2290                                         proto => 'udp', sport => 546, dport => 547 });
2291             } else {
2292                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2293                                       { action => 'ACCEPT',
2294                                         proto => 'udp', sport => 547, dport => 546 });
2295             }
2296         }
2297
2298     }
2299
2300     if ($direction eq 'OUT') {
2301         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2302             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2303         }
2304         if ($ipversion == 6 && !$options->{radv}) {
2305             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2306         }
2307         if ($ipfilter_ipset) {
2308             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2309         }
2310         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2311     }
2312
2313     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2314     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2315 }
2316
2317 sub ruleset_add_group_rule {
2318     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2319
2320     my $group = $rule->{action};
2321     my $group_chain = "GROUP-$group-$direction";
2322     if(!ruleset_chain_exist($ruleset, $group_chain)){
2323         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2324     }
2325
2326     if ($direction eq 'OUT' && $rule->{iface_out}) {
2327         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2328     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2329         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2330     } else {
2331         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2332     }
2333
2334     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2335 }
2336
2337 sub ruleset_generate_vm_rules {
2338     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion, $vmid) = @_;
2339
2340     my $lc_direction = lc($direction);
2341
2342     my $in_accept = generate_nfqueue($options);
2343
2344     foreach my $rule (@$rules) {
2345         next if $rule->{iface} && $rule->{iface} ne $netid;
2346         next if !$rule->{enable} || $rule->{errors};
2347         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2348
2349         if ($rule->{type} eq 'group') {
2350             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2351                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2352         } else {
2353             next if $rule->{type} ne $lc_direction;
2354             eval {
2355                 $rule->{logmsg} = "$rule->{action}: ";
2356                 if ($direction eq 'OUT') {
2357                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2358                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2359                 } else {
2360                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2361                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf, $vmid);
2362                 }
2363             };
2364             warn $@ if $@;
2365         }
2366     }
2367 }
2368
2369 sub generate_nfqueue {
2370     my ($options) = @_;
2371
2372     if ($options->{ips}) {
2373         my $action = "NFQUEUE";
2374         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2375             if (defined($3) && defined($1)) {
2376                 $action .= " --queue-balance $1:$3";
2377             } elsif (defined($1)) {
2378                 $action .= " --queue-num $1";
2379             }
2380         }
2381         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2382         return $action;
2383     } else {
2384         return "ACCEPT";
2385     }
2386 }
2387
2388 sub ruleset_generate_vm_ipsrules {
2389     my ($ruleset, $options, $direction, $iface) = @_;
2390
2391     if ($options->{ips} && $direction eq 'IN') {
2392         my $nfqueue = generate_nfqueue($options);
2393
2394         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2395             ruleset_create_chain($ruleset, "PVEFW-IPS");
2396         }
2397
2398         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2399     }
2400 }
2401
2402 sub generate_tap_rules_direction {
2403     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2404
2405     my $lc_direction = lc($direction);
2406
2407     my $rules = $vmfw_conf->{rules};
2408
2409     my $options = $vmfw_conf->{options};
2410     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2411
2412     my $tapchain = "$iface-$direction";
2413
2414     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2415     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2416         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2417
2418     if ($options->{enable}) {
2419         # create chain with mac and ip filter
2420         ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2421
2422         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion, $vmid);
2423
2424         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2425
2426         # implement policy
2427         my $policy;
2428
2429         if ($direction eq 'OUT') {
2430             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2431         } else {
2432             $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2433         }
2434
2435         my $accept = generate_nfqueue($options);
2436         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2437         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2438     } else {
2439         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2440         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2441     }
2442
2443     # plug the tap chain to bridge chain
2444     if ($direction eq 'IN') {
2445         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2446                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2447     } else {
2448         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2449                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2450     }
2451 }
2452
2453 sub enable_host_firewall {
2454     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf) = @_;
2455
2456     my $options = $hostfw_conf->{options};
2457     my $cluster_options = $cluster_conf->{options};
2458     my $rules = $hostfw_conf->{rules};
2459     my $cluster_rules = $cluster_conf->{rules};
2460
2461     # corosync preparation
2462     my $corosync_rule = "-p udp --dport 5404:5405";
2463     my $corosync_local_addresses = {};
2464     my $multicast_enabled;
2465     my $local_hostname = PVE::INotify::nodename();
2466     if (defined($corosync_conf)) {
2467         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2468             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2469
2470             if ($node_name eq $local_hostname) {
2471                 $corosync_local_addresses->{$key} = $node_ip;
2472             }
2473         });
2474
2475         # allow multicast only if enabled in config
2476         my $corosync_transport = $corosync_conf->{main}->{totem}->{transport};
2477         $multicast_enabled = defined($corosync_transport) && $corosync_transport eq 'udp';
2478     }
2479
2480     # host inbound firewall
2481     my $chain = "PVEFW-HOST-IN";
2482     ruleset_create_chain($ruleset, $chain);
2483
2484     my $loglevel = get_option_log_level($options, "log_level_in");
2485
2486     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2487
2488     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2489     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2490     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2491
2492     # we use RETURN because we need to check also tap rules
2493     my $accept_action = 'RETURN';
2494
2495     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2496
2497     # add host rules first, so that cluster wide rules can be overwritten
2498     foreach my $rule (@$rules, @$cluster_rules) {
2499         next if !$rule->{enable} || $rule->{errors};
2500         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2501
2502         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2503
2504         eval {
2505             $rule->{logmsg} = "$rule->{action}: ";
2506             if ($rule->{type} eq 'group') {
2507                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2508             } elsif ($rule->{type} eq 'in') {
2509                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2510                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2511             }
2512         };
2513         warn $@ if $@;
2514         delete $rule->{iface_in};
2515     }
2516
2517     # allow standard traffic for management ipset (includes cluster network)
2518     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2519     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2520     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2521     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2522     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2523     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2524     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 60000:60050", "-j $accept_action");  # Migration
2525
2526     # corosync inbound rules
2527     if (defined($corosync_conf)) {
2528         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2529             if $multicast_enabled;
2530
2531         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2532             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2533             my $destination = $corosync_local_addresses->{$key};
2534
2535             if ($node_name ne $local_hostname && defined($destination)) {
2536                 # accept only traffic on same ring
2537                 ruleset_addrule($ruleset, $chain, "-d $destination -s $node_ip $corosync_rule", "-j $accept_action");
2538             }
2539         });
2540     }
2541
2542     # implement input policy
2543     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2544     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2545
2546     # host outbound firewall
2547     $chain = "PVEFW-HOST-OUT";
2548     ruleset_create_chain($ruleset, $chain);
2549
2550     $loglevel = get_option_log_level($options, "log_level_out");
2551
2552     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2553
2554     ruleset_chain_add_conn_filters($ruleset, $chain, 0, 'ACCEPT');
2555
2556     # we use RETURN because we may want to check other thigs later
2557     $accept_action = 'RETURN';
2558     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2559
2560     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2561
2562     # add host rules first, so that cluster wide rules can be overwritten
2563     foreach my $rule (@$rules, @$cluster_rules) {
2564         next if !$rule->{enable} || $rule->{errors};
2565         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2566
2567         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2568         eval {
2569             $rule->{logmsg} = "$rule->{action}: ";
2570             if ($rule->{type} eq 'group') {
2571                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2572             } elsif ($rule->{type} eq 'out') {
2573                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2574                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf, 0);
2575             }
2576         };
2577         warn $@ if $@;
2578         delete $rule->{iface_out};
2579     }
2580
2581     # allow standard traffic on cluster network
2582     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2583     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2584
2585     if ($localnet && ($ipversion == $localnet_ver)) {
2586         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2587         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2588         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2589         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2590     }
2591
2592     # corosync outbound rules
2593     if (defined($corosync_conf)) {
2594         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action")
2595             if $multicast_enabled;
2596
2597         PVE::Corosync::for_all_corosync_addresses($corosync_conf, $ipversion, sub {
2598             my ($node_name, $node_ip, $node_ipversion, $key) = @_;
2599             my $source = $corosync_local_addresses->{$key};
2600
2601             if ($node_name ne $local_hostname && defined($source)) {
2602                 # accept only traffic on same ring
2603                 ruleset_addrule($ruleset, $chain, "-s $source -d $node_ip $corosync_rule", "-j $accept_action");
2604             }
2605         });
2606     }
2607
2608     # implement output policy
2609     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2610     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2611
2612     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2613     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2614 }
2615
2616 sub generate_group_rules {
2617     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2618
2619     my $rules = $cluster_conf->{groups}->{$group};
2620
2621     if (!$rules) {
2622         warn "no such security group '$group'\n";
2623         $rules = []; # create empty chain
2624     }
2625
2626     my $chain = "GROUP-${group}-IN";
2627
2628     ruleset_create_chain($ruleset, $chain);
2629     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2630
2631     foreach my $rule (@$rules) {
2632         next if $rule->{type} ne 'in';
2633         next if !$rule->{enable} || $rule->{errors};
2634         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2635         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2636         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2637     }
2638
2639     $chain = "GROUP-${group}-OUT";
2640
2641     ruleset_create_chain($ruleset, $chain);
2642     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2643
2644     foreach my $rule (@$rules) {
2645         next if $rule->{type} ne 'out';
2646         next if !$rule->{enable} || $rule->{errors};
2647         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2648         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2649         # check also other tap rules later
2650         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2651         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2652     }
2653 }
2654
2655 my $MAX_NETS = 32;
2656 my $valid_netdev_names = {};
2657 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2658     $valid_netdev_names->{"net$i"} = 1;
2659 }
2660
2661 sub get_mark_values {
2662     my ($value, $mask) = @_;
2663     $value = hex($value) if $value =~ /^0x/;
2664     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2665     $mask = 0xffffffff if !defined($mask);
2666     return ($value, $mask);
2667 }
2668
2669 sub parse_fw_rule {
2670     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env) = @_;
2671
2672     my $orig_line = $line;
2673
2674     my $rule = {};
2675
2676     # we can add single line comments to the end of the rule
2677     if ($line =~ s/#\s*(.*?)\s*$//) {
2678         $rule->{comment} = decode('utf8', $1);
2679     }
2680
2681     # we can disable a rule when prefixed with '|'
2682
2683     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2684
2685     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2686         die "unable to parse rule: $line\n";
2687
2688     $rule->{type} = lc($1);
2689     $rule->{action} = $2;
2690
2691     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2692         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2693             $rule->{macro} = $1;
2694             $rule->{action} = $2;
2695         }
2696     }
2697
2698     while (length($line)) {
2699         if ($line =~ s/^-i (\S+)\s*//) {
2700             $rule->{iface} = $1;
2701             next;
2702         }
2703
2704         last if $rule->{type} eq 'group';
2705
2706         if ($line =~ s/^-p (\S+)\s*//) {
2707             $rule->{proto} = $1;
2708             next;
2709         }
2710
2711         if ($line =~ s/^-dport (\S+)\s*//) {
2712             $rule->{dport} = $1;
2713             next;
2714         }
2715
2716         if ($line =~ s/^-sport (\S+)\s*//) {
2717             $rule->{sport} = $1;
2718             next;
2719         }
2720         if ($line =~ s/^-source (\S+)\s*//) {
2721             $rule->{source} = $1;
2722             next;
2723         }
2724         if ($line =~ s/^-dest (\S+)\s*//) {
2725             $rule->{dest} = $1;
2726             next;
2727         }
2728         if ($line =~ s/^-log (emerg|alert|crit|err|warning|notice|info|debug|nolog)\s*//) {
2729             $rule->{log} = $1;
2730             next;
2731         }
2732
2733         last;
2734     }
2735
2736     die "unable to parse rule parameters: $line\n" if length($line);
2737
2738     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2739     if ($rule->{errors}) {
2740         # The verbose flag really means we're running from the CLI and want
2741         # output on the console - in the other case we really want such errors
2742         # to go into the syslog instead.
2743         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2744         $log->("$prefix - errors in rule parameters: $orig_line\n");
2745         foreach my $p (keys %{$rule->{errors}}) {
2746             $log->("  $p: $rule->{errors}->{$p}\n");
2747         }
2748     }
2749
2750     return $rule;
2751 }
2752
2753 sub verify_ethertype {
2754     my ($value) = @_;
2755     my $types = get_etc_ethertypes();
2756     die "unknown ethernet protocol type: $value\n"
2757         if !defined($types->{byname}->{$value}) &&
2758            !defined($types->{byid}->{$value});
2759 }
2760
2761 sub parse_vmfw_option {
2762     my ($line) = @_;
2763
2764     my ($opt, $value);
2765
2766     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2767
2768     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2769         $opt = lc($1);
2770         $value = int($2);
2771     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2772         $opt = lc($1);
2773         $value = $2 ? lc($3) : '';
2774     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2775         $opt = lc($1);
2776         $value = uc($3);
2777     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2778         $opt = lc($1);
2779         $value = $2;
2780     } elsif ($line =~ m/^(layer2_protocols):\s*(((\S+)[,]?)+)\s*$/i) {
2781         $opt = lc($1);
2782         $value = $2;
2783         verify_ethertype($_) foreach split(/\s*,\s*/, $value);
2784     } else {
2785         die "can't parse option '$line'\n"
2786     }
2787
2788     return ($opt, $value);
2789 }
2790
2791 sub parse_hostfw_option {
2792     my ($line) = @_;
2793
2794     my ($opt, $value);
2795
2796     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2797
2798     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp|log_nf_conntrack|nf_conntrack_allow_invalid|protection_synflood):\s*(0|1)\s*$/i) {
2799         $opt = lc($1);
2800         $value = int($2);
2801     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2802         $opt = lc($1);
2803         $value = $2 ? lc($3) : '';
2804     } elsif ($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) {
2805         $opt = lc($1);
2806         $value = int($2);
2807     } else {
2808         die "can't parse option '$line'\n"
2809     }
2810
2811     return ($opt, $value);
2812 }
2813
2814 sub parse_clusterfw_option {
2815     my ($line) = @_;
2816
2817     my ($opt, $value);
2818
2819     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2820         $opt = lc($1);
2821         $value = int($2);
2822         if (($value > 1) && ((time() - $value) > 60)) {
2823             $value = 0
2824         }
2825     } elsif ($line =~ m/^(ebtables):\s*(0|1)\s*$/i) {
2826         $opt = lc($1);
2827         $value = int($2);
2828     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2829         $opt = lc($1);
2830         $value = uc($3);
2831     } elsif ($line =~ m/^(log_ratelimit):\s*(\S+)\s*$/) {
2832         $opt = lc($1);
2833         $value = $2;
2834     } else {
2835         die "can't parse option '$line'\n"
2836     }
2837
2838     return ($opt, $value);
2839 }
2840
2841 sub resolve_alias {
2842     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2843
2844     my $alias = lc($cidr);
2845     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2846     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2847
2848     die "no such alias '$cidr'\n" if !$e;;
2849
2850     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2851 }
2852
2853 sub parse_ip_or_cidr {
2854     my ($cidr) = @_;
2855
2856     my $ipversion;
2857
2858     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2859         $cidr =~ s|/128$||;
2860         $ipversion = 6;
2861     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2862         $cidr =~ s|/32$||;
2863         $ipversion = 4;
2864     } else {
2865         die "value does not look like a valid IP address or CIDR network\n";
2866     }
2867
2868     return wantarray ? ($cidr, $ipversion) : $cidr;
2869 }
2870
2871 sub parse_alias {
2872     my ($line) = @_;
2873
2874     # we can add single line comments to the end of the line
2875     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2876
2877     if ($line =~ m/^(\S+)\s(\S+)$/) {
2878         my ($name, $cidr) = ($1, $2);
2879         my $ipversion;
2880
2881         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2882
2883         my $data = {
2884             name => $name,
2885             cidr => $cidr,
2886             ipversion => $ipversion,
2887         };
2888         $data->{comment} = $comment  if $comment;
2889         return $data;
2890     }
2891
2892     return undef;
2893 }
2894
2895 sub generic_fw_config_parser {
2896     my ($filename, $cluster_conf, $empty_conf, $rule_env) = @_;
2897
2898     my $section;
2899     my $group;
2900
2901     my $res = $empty_conf;
2902
2903     my $raw;
2904     if ($filename =~ m!^/etc/pve/(.*)$!) {
2905         $raw = PVE::Cluster::get_config($1);
2906     } else {
2907         $raw = eval { PVE::Tools::file_get_contents($filename) }; # ignore errors
2908     }
2909     return {} if !$raw;
2910
2911     my $curr_group_keys = {};
2912
2913     my $linenr = 0;
2914     while ($raw =~ /^\h*(.*?)\h*$/gm) {
2915         my $line = $1;
2916         $linenr++;
2917         next if $line =~ m/^#/;
2918         next if $line =~ m/^\s*$/;
2919         chomp $line;
2920
2921         my $prefix = "$filename (line $linenr)";
2922
2923         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2924             $section = 'options';
2925             next;
2926         }
2927
2928         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2929             $section = 'aliases';
2930             next;
2931         }
2932
2933         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2934             $section = 'groups';
2935             $group = lc($1);
2936             my $comment = $2;
2937             eval {
2938                 die "security group name too long\n" if length($group) > $max_group_name_length;
2939                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2940             };
2941             if (my $err = $@) {
2942                 ($section, $group, $comment) = undef;
2943                 warn "$prefix: $err";
2944                 next;
2945             }
2946
2947             $res->{$section}->{$group} = [];
2948             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2949                 if $comment;
2950             next;
2951         }
2952
2953         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2954             $section = 'rules';
2955             next;
2956         }
2957
2958         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2959             $section = 'ipset';
2960             $group = lc($1);
2961             my $comment = $2;
2962             eval {
2963                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2964                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2965             };
2966             if (my $err = $@) {
2967                 ($section, $group, $comment) = undef;
2968                 warn "$prefix: $err";
2969                 next;
2970             }
2971
2972             $res->{$section}->{$group} = [];
2973             $curr_group_keys = {};
2974
2975             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2976                 if $comment;
2977             next;
2978         }
2979
2980         if (!$section) {
2981             warn "$prefix: skip line - no section\n";
2982             next;
2983         }
2984
2985         if ($section eq 'options') {
2986             eval {
2987                 my ($opt, $value);
2988                 if ($rule_env eq 'cluster') {
2989                     ($opt, $value) = parse_clusterfw_option($line);
2990                 } elsif ($rule_env eq 'host') {
2991                     ($opt, $value) = parse_hostfw_option($line);
2992                 } else {
2993                     ($opt, $value) = parse_vmfw_option($line);
2994                 }
2995                 $res->{options}->{$opt} = $value;
2996             };
2997             warn "$prefix: $@" if $@;
2998         } elsif ($section eq 'aliases') {
2999             eval {
3000                 my $data = parse_alias($line);
3001                 $res->{aliases}->{lc($data->{name})} = $data;
3002             };
3003             warn "$prefix: $@" if $@;
3004         } elsif ($section eq 'rules') {
3005             my $rule;
3006             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env); };
3007             if (my $err = $@) {
3008                 warn "$prefix: $err";
3009                 next;
3010             }
3011             push @{$res->{$section}}, $rule;
3012         } elsif ($section eq 'groups') {
3013             my $rule;
3014             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group'); };
3015             if (my $err = $@) {
3016                 warn "$prefix: $err";
3017                 next;
3018             }
3019             push @{$res->{$section}->{$group}}, $rule;
3020         } elsif ($section eq 'ipset') {
3021             # we can add single line comments to the end of the rule
3022             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
3023
3024             $line =~ m/^(\!)?\s*(\S+)\s*$/;
3025             my $nomatch = $1;
3026             my $cidr = $2;
3027             my $errors;
3028
3029             if ($nomatch && !$feature_ipset_nomatch) {
3030                 $errors->{nomatch} = "nomatch not supported by kernel";
3031             }
3032
3033             eval {
3034                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
3035                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
3036                 } else {
3037                     $cidr = parse_ip_or_cidr($cidr);
3038                 }
3039                 die "duplicate ipset entry for '$cidr'\n"
3040                     if defined($curr_group_keys->{$cidr});
3041             };
3042             if (my $err = $@) {
3043                 chomp $err;
3044                 $errors->{cidr} = $err;
3045             }
3046
3047             if ($cidr =~ m!/0+$!) {
3048                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
3049             }
3050
3051             my $entry = { cidr => $cidr };
3052             $entry->{nomatch} = 1 if $nomatch;
3053             $entry->{comment} = $comment if $comment;
3054             $entry->{errors} =  $errors if $errors;
3055
3056             if ($verbose && $errors) {
3057                 warn "$prefix - errors in ipset '$group': $line\n";
3058                 foreach my $p (keys %{$errors}) {
3059                     warn "  $p: $errors->{$p}\n";
3060                 }
3061             }
3062
3063             push @{$res->{$section}->{$group}}, $entry;
3064             $curr_group_keys->{$cidr} = 1;
3065         } else {
3066             warn "$prefix: skip line - unknown section\n";
3067             next;
3068         }
3069     }
3070
3071     return $res;
3072 }
3073
3074 # this is only used to prevent concurrent runs of rule compilation/application
3075 # see lock_*_conf for cfs locks protectiong config modification
3076 sub run_locked {
3077     my ($code, @param) = @_;
3078
3079     my $timeout = 10;
3080
3081     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
3082
3083     die $@ if $@;
3084
3085     return $res;
3086 }
3087
3088 sub read_local_vm_config {
3089
3090     my $qemu = {};
3091     my $lxc = {};
3092
3093     my $vmdata = { qemu => $qemu, lxc => $lxc };
3094
3095     my $vmlist = PVE::Cluster::get_vmlist();
3096     return $vmdata if !$vmlist || !$vmlist->{ids};
3097     my $ids = $vmlist->{ids};
3098
3099     foreach my $vmid (keys %$ids) {
3100         next if !$vmid; # skip VE0
3101         my $d = $ids->{$vmid};
3102         next if !$d->{node} || $d->{node} ne $nodename;
3103         next if !$d->{type};
3104         if ($d->{type} eq 'qemu') {
3105             if ($have_qemu_server) {
3106                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
3107                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3108                     $qemu->{$vmid} = $conf;
3109                 }
3110             }
3111         } elsif ($d->{type} eq 'lxc') {
3112             if ($have_lxc) {
3113                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
3114                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
3115                     $lxc->{$vmid} = $conf;
3116                 }
3117             }
3118         }
3119     }
3120
3121     return $vmdata;
3122 };
3123
3124 sub lock_vmfw_conf {
3125     my ($vmid, $timeout, $code, @param) = @_;
3126
3127     die "can't lock VM firewall config for undefined VMID\n"
3128         if !defined($vmid);
3129
3130     my $res = PVE::Cluster::cfs_lock_firewall("vm-$vmid", $timeout, $code, @param);
3131     die $@ if $@;
3132
3133     return $res;
3134 }
3135
3136 sub load_vmfw_conf {
3137     my ($cluster_conf, $rule_env, $vmid, $dir) = @_;
3138
3139     $dir = $pvefw_conf_dir if !defined($dir);
3140     my $filename = "$dir/$vmid.fw";
3141
3142     my $empty_conf = {
3143         rules => [],
3144         options => {},
3145         aliases => {},
3146         ipset => {} ,
3147         ipset_comments => {},
3148     };
3149
3150     my $vmfw_conf = generic_fw_config_parser($filename, $cluster_conf, $empty_conf, $rule_env);
3151     $vmfw_conf->{vmid} = $vmid;
3152
3153     return $vmfw_conf;
3154 }
3155
3156 my $format_rules = sub {
3157     my ($rules, $allow_iface) = @_;
3158
3159     my $raw = '';
3160
3161     foreach my $rule (@$rules) {
3162         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
3163             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
3164             $raw .= uc($rule->{type});
3165             if ($rule->{macro}) {
3166                 $raw .= " $rule->{macro}($rule->{action})";
3167             } else {
3168                 $raw .= " " . $rule->{action};
3169             }
3170             if ($allow_iface && $rule->{iface}) {
3171                 $raw .= " -i $rule->{iface}";
3172             }
3173
3174             if ($rule->{type} ne  'group')  {
3175                 $raw .= " -source $rule->{source}" if $rule->{source};
3176                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
3177                 $raw .= " -p $rule->{proto}" if $rule->{proto};
3178                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
3179                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
3180                 $raw .= " -log $rule->{log}" if $rule->{log};
3181             }
3182
3183             $raw .= " # " . encode('utf8', $rule->{comment})
3184                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
3185             $raw .= "\n";
3186         } else {
3187             die "unknown rule type '$rule->{type}'";
3188         }
3189     }
3190
3191     return $raw;
3192 };
3193
3194 my $format_options = sub {
3195     my ($options) = @_;
3196
3197     my $raw = '';
3198
3199     $raw .= "[OPTIONS]\n\n";
3200     foreach my $opt (keys %$options) {
3201         $raw .= "$opt: $options->{$opt}\n";
3202     }
3203     $raw .= "\n";
3204
3205     return $raw;
3206 };
3207
3208 my $format_aliases = sub {
3209     my ($aliases) = @_;
3210
3211     my $raw = '';
3212
3213     $raw .= "[ALIASES]\n\n";
3214     foreach my $k (keys %$aliases) {
3215         my $e = $aliases->{$k};
3216         $raw .= "$e->{name} $e->{cidr}";
3217         $raw .= " # " . encode('utf8', $e->{comment})
3218             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
3219         $raw .= "\n";
3220     }
3221     $raw .= "\n";
3222
3223     return $raw;
3224 };
3225
3226 my $format_ipsets = sub {
3227     my ($fw_conf) = @_;
3228
3229     my $raw = '';
3230
3231     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3232         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3233             my $utf8comment = encode('utf8', $comment);
3234             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3235         } else {
3236             $raw .= "[IPSET $ipset]\n\n";
3237         }
3238         my $options = $fw_conf->{ipset}->{$ipset};
3239
3240         my $nethash = {};
3241         foreach my $entry (@$options) {
3242             my $cidr = $entry->{cidr};
3243             if (defined($nethash->{$cidr})) {
3244                 warn "ignoring duplicate ipset entry '$cidr'\n";
3245                 next;
3246             }
3247
3248             $nethash->{$cidr} = $entry;
3249         }
3250
3251         foreach my $cidr (sort keys %$nethash) {
3252             my $entry = $nethash->{$cidr};
3253             my $line = $entry->{nomatch} ? '!' : '';
3254             $line .= $entry->{cidr};
3255             $line .= " # " . encode('utf8', $entry->{comment})
3256                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3257             $raw .= "$line\n";
3258         }
3259
3260         $raw .= "\n";
3261     }
3262
3263     return $raw;
3264 };
3265
3266 sub save_vmfw_conf {
3267     my ($vmid, $vmfw_conf) = @_;
3268
3269     my $raw = '';
3270
3271     my $options = $vmfw_conf->{options};
3272     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3273
3274     my $aliases = $vmfw_conf->{aliases};
3275     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3276
3277     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3278
3279     my $rules = $vmfw_conf->{rules} || [];
3280     if ($rules && scalar(@$rules)) {
3281         $raw .= "[RULES]\n\n";
3282         $raw .= &$format_rules($rules, 1);
3283         $raw .= "\n";
3284     }
3285
3286     my $filename = "$pvefw_conf_dir/$vmid.fw";
3287     if ($raw) {
3288         mkdir $pvefw_conf_dir;
3289         PVE::Tools::file_set_contents($filename, $raw);
3290     } else {
3291         unlink $filename;
3292     }
3293 }
3294
3295 sub remove_vmfw_conf {
3296     my ($vmid) = @_;
3297
3298     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3299
3300     unlink $vmfw_conffile;
3301 }
3302
3303 sub clone_vmfw_conf {
3304     my ($vmid, $newid) = @_;
3305
3306     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3307     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3308
3309     lock_vmfw_conf($newid, 10, sub {
3310         if (-f $clonevm_conffile) {
3311             unlink $clonevm_conffile;
3312         }
3313         if (-f $sourcevm_conffile) {
3314             my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3315             PVE::Tools::file_set_contents($clonevm_conffile, $data);
3316         }
3317     });
3318 }
3319
3320 sub read_vm_firewall_configs {
3321     my ($cluster_conf, $vmdata, $dir) = @_;
3322
3323     my $vmfw_configs = {};
3324
3325     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3326         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir);
3327         next if !$vmfw_conf->{options}; # skip if file does not exist
3328         $vmfw_configs->{$vmid} = $vmfw_conf;
3329     }
3330     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3331         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir);
3332         next if !$vmfw_conf->{options}; # skip if file does not exist
3333         $vmfw_configs->{$vmid} = $vmfw_conf;
3334     }
3335
3336     return $vmfw_configs;
3337 }
3338
3339 sub get_option_log_level {
3340     my ($options, $k) = @_;
3341
3342     my $v = $options->{$k};
3343     $v = $default_log_level if !defined($v);
3344
3345     return undef if $v eq '' || $v eq 'nolog';
3346
3347     return $v if defined($log_level_hash->{$v});
3348
3349     warn "unknown log level ($k = '$v')\n";
3350
3351     return undef;
3352 }
3353
3354 sub generate_std_chains {
3355     my ($ruleset, $options, $ipversion) = @_;
3356
3357     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3358
3359     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3360     my $chain = 'PVEFW-smurflog';
3361     if ( $std_chains->{$chain} ) {
3362         foreach my $r (@{$std_chains->{$chain}}) {
3363           $r->{log} = $loglevel;
3364         }
3365     }
3366
3367     # same as shorewall logflags action.
3368     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3369     $chain = 'PVEFW-logflags';
3370     if ( $std_chains->{$chain} ) {
3371         foreach my $r (@{$std_chains->{$chain}}) {
3372           $r->{log} = $loglevel;
3373         }
3374     }
3375
3376     foreach my $chain (keys %$std_chains) {
3377         ruleset_create_chain($ruleset, $chain);
3378         foreach my $rule (@{$std_chains->{$chain}}) {
3379             if (ref($rule)) {
3380                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, 0);
3381             } else {
3382                 die "rule $rule as string - should not happen";
3383             }
3384         }
3385     }
3386 }
3387
3388 sub generate_ipset_chains {
3389     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3390
3391     foreach my $ipset (keys %{$ipsets}) {
3392
3393         my $options = $ipsets->{$ipset};
3394
3395         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3396             if (my $ips = $device_ips->{$1}) {
3397                 $options = [@$options, @$ips];
3398             }
3399         }
3400
3401         # remove duplicates
3402         my $nethash = {};
3403         foreach my $entry (@$options) {
3404             next if $entry->{errors}; # skip entries with errors
3405             eval {
3406                 my ($cidr, $ver);
3407                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3408                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3409                 } else {
3410                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3411                 }
3412                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3413                 if ($ver == 6) {
3414                     # ip_compress_address takes an address only, no CIDR
3415                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3416                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3417                     $cidr .= $prefix_len if defined($prefix_len);
3418                     $cidr =~ s|/128$||;
3419                 } else {
3420                     $cidr =~ s|/32$||;
3421                 }
3422
3423                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3424             };
3425             warn $@ if $@;
3426         }
3427
3428         foreach my $ipversion (4, 6) {
3429             my $data = $nethash->{$ipversion};
3430
3431             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3432
3433             my $hashsize = scalar(@$options);
3434             if ($hashsize <= 64) {
3435                 $hashsize = 64;
3436             } else {
3437                 $hashsize = round_powerof2($hashsize);
3438             }
3439
3440             my $family = $ipversion == "6" ? "inet6" : "inet";
3441
3442             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3443
3444             foreach my $cidr (sort keys %$data) {
3445                 my $entry = $data->{$cidr};
3446
3447                 my $cmd = "add $name $cidr";
3448                 if ($entry->{nomatch}) {
3449                     if ($feature_ipset_nomatch) {
3450                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3451                     } else {
3452                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3453                     }
3454                 } else {
3455                     push @{$ipset_ruleset->{$name}}, $cmd;
3456                 }
3457             }
3458         }
3459     }
3460 }
3461
3462 sub round_powerof2 {
3463     my ($int) = @_;
3464
3465     $int--;
3466     $int |= $int >> $_ foreach (1,2,4,8,16);
3467     return ++$int;
3468 }
3469
3470 my $set_global_log_ratelimit = sub {
3471     my $cluster_opts = shift;
3472
3473     $global_log_ratelimit = '--limit 1/sec';
3474     if (defined(my $log_rlimit = $cluster_opts->{log_ratelimit})) {
3475         my $ll_format = $cluster_option_properties->{log_ratelimit}->{format};
3476         my $limit = PVE::JSONSchema::parse_property_string($ll_format, $log_rlimit);
3477
3478         if ($limit->{enable}) {
3479             if (my $rate = $limit->{rate}) {
3480                 $global_log_ratelimit = "--limit $rate";
3481             }
3482             if (my $burst = $limit->{burst}) {
3483                 $global_log_ratelimit .= " --limit-burst $burst";
3484             }
3485         } else {
3486             $global_log_ratelimit = undef;
3487         }
3488     }
3489 };
3490
3491 sub lock_clusterfw_conf {
3492     my ($timeout, $code, @param) = @_;
3493
3494     my $res = PVE::Cluster::cfs_lock_firewall("cluster", $timeout, $code, @param);
3495     die $@ if $@;
3496
3497     return $res;
3498 }
3499
3500 sub load_clusterfw_conf {
3501     my ($filename) = @_;
3502
3503     $filename = $clusterfw_conf_filename if !defined($filename);
3504     my $empty_conf = {
3505         rules => [],
3506         options => {},
3507         aliases => {},
3508         groups => {},
3509         group_comments => {},
3510         ipset => {} ,
3511         ipset_comments => {},
3512     };
3513
3514     my $cluster_conf = generic_fw_config_parser($filename, $empty_conf, $empty_conf, 'cluster');
3515     $set_global_log_ratelimit->($cluster_conf->{options});
3516
3517     return $cluster_conf;
3518 }
3519
3520 sub save_clusterfw_conf {
3521     my ($cluster_conf) = @_;
3522
3523     my $raw = '';
3524
3525     my $options = $cluster_conf->{options};
3526     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3527
3528     my $aliases = $cluster_conf->{aliases};
3529     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3530
3531     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3532
3533     my $rules = $cluster_conf->{rules};
3534     if ($rules && scalar(@$rules)) {
3535         $raw .= "[RULES]\n\n";
3536         $raw .= &$format_rules($rules, 1);
3537         $raw .= "\n";
3538     }
3539
3540     if ($cluster_conf->{groups}) {
3541         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3542             my $rules = $cluster_conf->{groups}->{$group};
3543             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3544                 my $utf8comment = encode('utf8', $comment);
3545                 $raw .= "[group $group] # $utf8comment\n\n";
3546             } else {
3547                 $raw .= "[group $group]\n\n";
3548             }
3549
3550             $raw .= &$format_rules($rules, 0);
3551             $raw .= "\n";
3552         }
3553     }
3554
3555     if ($raw) {
3556         mkdir $pvefw_conf_dir;
3557         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3558     } else {
3559         unlink $clusterfw_conf_filename;
3560     }
3561 }
3562
3563 sub lock_hostfw_conf {
3564     my ($timeout, $code, @param) = @_;
3565
3566     my $res = PVE::Cluster::cfs_lock_firewall("host-$nodename", $timeout, $code, @param);
3567     die $@ if $@;
3568
3569     return $res;
3570 }
3571
3572 sub load_hostfw_conf {
3573     my ($cluster_conf, $filename) = @_;
3574
3575     $filename = $hostfw_conf_filename if !defined($filename);
3576
3577     my $empty_conf = { rules => [], options => {}};
3578     return generic_fw_config_parser($filename, $cluster_conf, $empty_conf, 'host');
3579 }
3580
3581 sub save_hostfw_conf {
3582     my ($hostfw_conf) = @_;
3583
3584     my $raw = '';
3585
3586     my $options = $hostfw_conf->{options};
3587     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3588
3589     my $rules = $hostfw_conf->{rules};
3590     if ($rules && scalar(@$rules)) {
3591         $raw .= "[RULES]\n\n";
3592         $raw .= &$format_rules($rules, 1);
3593         $raw .= "\n";
3594     }
3595
3596     if ($raw) {
3597         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3598     } else {
3599         unlink $hostfw_conf_filename;
3600     }
3601 }
3602
3603 sub compile {
3604     my ($cluster_conf, $hostfw_conf, $vmdata, $corosync_conf) = @_;
3605
3606     my $vmfw_configs;
3607
3608     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3609     $pve_std_chains = dclone($pve_std_chains_conf);
3610
3611     if ($vmdata) { # test mode
3612         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3613         my $filename = "$testdir/cluster.fw";
3614         $cluster_conf = load_clusterfw_conf($filename);
3615
3616         $filename = "$testdir/host.fw";
3617         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename);
3618
3619         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir);
3620     } else { # normal operation
3621         $cluster_conf = load_clusterfw_conf(undef) if !$cluster_conf;
3622
3623         $hostfw_conf = load_hostfw_conf($cluster_conf, undef) if !$hostfw_conf;
3624
3625         # cfs_update is handled by daemon or API
3626         $corosync_conf = PVE::Cluster::cfs_read_file("corosync.conf")
3627             if !defined($corosync_conf) && PVE::Corosync::check_conf_exists(1);
3628
3629         $vmdata = read_local_vm_config();
3630         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef);
3631     }
3632
3633     return ({},{},{},{}) if !$cluster_conf->{options}->{enable};
3634
3635     my $localnet;
3636     if ($cluster_conf->{aliases}->{local_network}) {
3637         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3638     } else {
3639         my $localnet_ver;
3640         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3641
3642         $cluster_conf->{aliases}->{local_network} = {
3643             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3644     }
3645
3646     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3647
3648     my $ruleset = {};
3649     my $rulesetv6 = {};
3650     $ruleset->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3651     $ruleset->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 4);
3652     $rulesetv6->{filter} = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3653     $rulesetv6->{raw} = compile_iptables_raw($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, 6);
3654     my $ebtables_ruleset = compile_ebtables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata);
3655     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3656
3657     return ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
3658 }
3659
3660 sub compile_iptables_raw {
3661     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3662
3663     my $ruleset = {};
3664
3665     my $hostfw_options = $hostfw_conf->{options} || {};
3666     my $protection_synflood = $hostfw_options->{protection_synflood} || 0;
3667
3668     if($protection_synflood) {
3669
3670         my $protection_synflood_rate = $hostfw_options->{protection_synflood_rate} ? $hostfw_options->{protection_synflood_rate} : 200;
3671         my $protection_synflood_burst = $hostfw_options->{protection_synflood_burst} ? $hostfw_options->{protection_synflood_burst} : 1000;
3672         my $protection_synflood_limit = $hostfw_options->{protection_synflood_limit} ? $hostfw_options->{protection_synflood_limit} : 3000;
3673         my $protection_synflood_expire = $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} ? $hostfw_options->{nf_conntrack_tcp_timeout_syn_recv} : 60;
3674         $protection_synflood_expire = $protection_synflood_expire * 1000;
3675         my $protection_synflood_mask = $ipversion == 4 ? 32 : 64;
3676
3677         ruleset_create_chain($ruleset, "PVEFW-PREROUTING");
3678         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");
3679     }
3680
3681     return $ruleset;
3682 }
3683
3684 sub compile_iptables_filter {
3685     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $corosync_conf, $ipversion) = @_;
3686
3687     my $ruleset = {};
3688
3689     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3690     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3691
3692     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3693
3694     my $hostfw_options = $hostfw_conf->{options} || {};
3695
3696     # fixme: what log level should we use here?
3697     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3698
3699     my $conn_allow_invalid = $hostfw_options->{nf_conntrack_allow_invalid} // 0;
3700     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", $conn_allow_invalid, "ACCEPT");
3701
3702     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3703     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3704
3705     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3706
3707     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3708     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3709
3710     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3711
3712     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3713
3714     if ($hostfw_enable) {
3715         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion, $corosync_conf); };
3716         warn $@ if $@; # just to be sure - should not happen
3717     }
3718
3719     # generate firewall rules for QEMU VMs
3720     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3721         eval {
3722             my $conf = $vmdata->{qemu}->{$vmid};
3723             my $vmfw_conf = $vmfw_configs->{$vmid};
3724             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3725
3726             foreach my $netid (sort keys %$conf) {
3727                 next if $netid !~ m/^net(\d+)$/;
3728                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3729                 next if !$net->{firewall};
3730
3731                 my $iface = "tap${vmid}i$1";
3732                 my $macaddr = $net->{macaddr};
3733                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3734                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3735                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3736                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3737             }
3738         };
3739         warn $@ if $@; # just to be sure - should not happen
3740     }
3741
3742     # generate firewall rules for LXC containers
3743     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3744         eval {
3745             my $conf = $vmdata->{lxc}->{$vmid};
3746             my $vmfw_conf = $vmfw_configs->{$vmid};
3747             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3748
3749             foreach my $netid (sort keys %$conf) {
3750                 next if $netid !~ m/^net(\d+)$/;
3751                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3752                 next if !$net->{firewall};
3753
3754                 my $iface = "veth${vmid}i$1";
3755                 my $macaddr = $net->{hwaddr};
3756                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3757                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3758                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3759                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3760             }
3761         };
3762         warn $@ if $@; # just to be sure - should not happen
3763     }
3764
3765     if (ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3766         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3767     }
3768
3769     return $ruleset;
3770 }
3771
3772 sub mac_to_linklocal {
3773     my ($macaddr) = @_;
3774     my @parts = split(/:/, $macaddr);
3775     # The standard link local address uses the fe80::/64 prefix with the
3776     # modified EUI-64 identifier derived from the MAC address by flipping the
3777     # universal/local bit and inserting FF:FE in the middle.
3778     # See RFC 4291.
3779     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3780     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3781     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3782 }
3783
3784 sub compile_ipsets {
3785     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3786
3787     my $localnet;
3788     if ($cluster_conf->{aliases}->{local_network}) {
3789         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3790     } else {
3791         my $localnet_ver;
3792         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3793
3794         $cluster_conf->{aliases}->{local_network} = {
3795             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3796     }
3797
3798     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3799
3800
3801     my $ipset_ruleset = {};
3802
3803     # generate ipsets for QEMU VMs
3804     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3805         eval {
3806             my $conf = $vmdata->{qemu}->{$vmid};
3807             my $vmfw_conf = $vmfw_configs->{$vmid};
3808             return if !$vmfw_conf;
3809
3810             # When the 'ipfilter' option is enabled every device for which there
3811             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3812             # ipset.
3813             # The reason is that ipfilter ipsets are always filled with standard
3814             # IPv6 link-local filters.
3815             my $ipsets = $vmfw_conf->{ipset};
3816             my $implicit_sets = {};
3817
3818             my $device_ips = {};
3819             foreach my $netid (keys %$conf) {
3820                 next if $netid !~ m/^net(\d+)$/;
3821                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3822                 next if !$net->{firewall};
3823
3824                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3825                     $implicit_sets->{"ipfilter-$netid"} = [];
3826                 }
3827
3828                 my $macaddr = $net->{macaddr};
3829                 my $linklocal = mac_to_linklocal($macaddr);
3830                 $device_ips->{$netid} = [
3831                     { cidr => $linklocal },
3832                     { cidr => 'fe80::/10', nomatch => 1 }
3833                 ];
3834             }
3835
3836             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3837             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3838         };
3839         warn $@ if $@; # just to be sure - should not happen
3840     }
3841
3842     # generate firewall rules for LXC containers
3843     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3844         eval {
3845             my $conf = $vmdata->{lxc}->{$vmid};
3846             my $vmfw_conf = $vmfw_configs->{$vmid};
3847             return if !$vmfw_conf;
3848
3849             # When the 'ipfilter' option is enabled every device for which there
3850             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3851             # ipset.
3852             # The reason is that ipfilter ipsets are always filled with standard
3853             # IPv6 link-local filters, as well as the IP addresses configured
3854             # for the container.
3855             my $ipsets = $vmfw_conf->{ipset};
3856             my $implicit_sets = {};
3857
3858             my $device_ips = {};
3859             foreach my $netid (keys %$conf) {
3860                 next if $netid !~ m/^net(\d+)$/;
3861                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3862                 next if !$net->{firewall};
3863
3864                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3865                     $implicit_sets->{"ipfilter-$netid"} = [];
3866                 }
3867
3868                 my $macaddr = $net->{hwaddr};
3869                 my $linklocal = mac_to_linklocal($macaddr);
3870                 my $set = $device_ips->{$netid} = [
3871                     { cidr => $linklocal },
3872                     { cidr => 'fe80::/10', nomatch => 1 }
3873                 ];
3874                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3875                     push @$set, { cidr => $1 };
3876                 }
3877                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3878                     push @$set, { cidr => $1 };
3879                 }
3880             }
3881
3882             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3883             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3884         };
3885         warn $@ if $@; # just to be sure - should not happen
3886     }
3887
3888     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3889
3890     return $ipset_ruleset;
3891 }
3892
3893 sub compile_ebtables_filter {
3894     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata) = @_;
3895
3896     if (!($cluster_conf->{options}->{ebtables} // 1)) {
3897         return {};
3898     }
3899
3900     my $ruleset = {};
3901
3902     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3903
3904     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3905     #for ipv4 and ipv6, check macaddress in iptables, so we use conntrack 'ESTABLISHED', to speedup rules
3906     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv4', '-j ACCEPT');
3907     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-p IPv6', '-j ACCEPT');
3908     ruleset_addrule($ruleset, 'PVEFW-FORWARD', '-o fwln+', '-j PVEFW-FWBR-OUT');
3909
3910     # generate firewall rules for QEMU VMs
3911     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3912         eval {
3913             my $conf = $vmdata->{qemu}->{$vmid};
3914             my $vmfw_conf = $vmfw_configs->{$vmid};
3915             return if !$vmfw_conf;
3916             my $ipsets = $vmfw_conf->{ipset};
3917
3918             foreach my $netid (sort keys %$conf) {
3919                 next if $netid !~ m/^net(\d+)$/;
3920                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3921                 next if !$net->{firewall};
3922                 my $iface = "tap${vmid}i$1";
3923                 my $macaddr = $net->{macaddr};
3924                 my $arpfilter = [];
3925                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3926                     foreach my $ipaddr (@$ipset) {
3927                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3928                         next if !$ip || ($version && $version != 4);
3929                         push(@$arpfilter, $ip);
3930                     }
3931                 }
3932                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3933             }
3934         };
3935         warn $@ if $@; # just to be sure - should not happen
3936     }
3937
3938     # generate firewall rules for LXC containers
3939     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3940         eval {
3941             my $conf = $vmdata->{lxc}->{$vmid};
3942
3943             my $vmfw_conf = $vmfw_configs->{$vmid};
3944             return if !$vmfw_conf || !$vmfw_conf->{options}->{enable};
3945             my $ipsets = $vmfw_conf->{ipset};
3946
3947             foreach my $netid (sort keys %$conf) {
3948                 next if $netid !~ m/^net(\d+)$/;
3949                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3950                 next if !$net->{firewall};
3951                 my $iface = "veth${vmid}i$1";
3952                 my $macaddr = $net->{hwaddr};
3953                 my $arpfilter = [];
3954                 if (defined(my $ipset = $ipsets->{"ipfilter-$netid"})) {
3955                     foreach my $ipaddr (@$ipset) {
3956                         my($ip, $version) = parse_ip_or_cidr($ipaddr->{cidr});
3957                         next if !$ip || ($version && $version != 4);
3958                         push(@$arpfilter, $ip);
3959                     }
3960                 }
3961                 if (defined(my $ip = $net->{ip}) && $vmfw_conf->{options}->{ipfilter}) {
3962                     # ebtables changes this to a .0/MASK network but we just
3963                     # want the address here, no network - see #2193
3964                     $ip =~ s|/(\d+)$||;
3965                     if ($ip ne 'dhcp') {
3966                         push @$arpfilter, $ip;
3967                     }
3968                 }
3969                 generate_tap_layer2filter($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter);
3970             }
3971         };
3972         warn $@ if $@; # just to be sure - should not happen
3973     }
3974
3975     return $ruleset;
3976 }
3977
3978 sub generate_tap_layer2filter {
3979     my ($ruleset, $iface, $macaddr, $vmfw_conf, $vmid, $arpfilter) = @_;
3980     my $options = $vmfw_conf->{options};
3981
3982     my $tapchain = $iface."-OUT";
3983
3984     # ebtables remove zeros from mac pairs
3985     $macaddr =~ s/0([0-9a-f])/$1/ig;
3986     $macaddr = lc($macaddr);
3987
3988     ruleset_create_chain($ruleset, $tapchain);
3989
3990     if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
3991             ruleset_addrule($ruleset, $tapchain, "-s ! $macaddr", '-j DROP');
3992     }
3993
3994     if (@$arpfilter){
3995         my $arpchain = $tapchain."-ARP";
3996         ruleset_addrule($ruleset, $tapchain, "-p ARP", "-j $arpchain");
3997         ruleset_create_chain($ruleset, $arpchain);
3998
3999         foreach my $ip (@{$arpfilter}) {
4000             ruleset_addrule($ruleset, $arpchain, "-p ARP --arp-ip-src $ip", '-j RETURN');
4001         }
4002         ruleset_addrule($ruleset, $arpchain, '', '-j DROP');
4003     }
4004
4005     if (defined($options->{layer2_protocols})){
4006         my $protochain = $tapchain."-PROTO";
4007         ruleset_addrule($ruleset, $tapchain, '', "-j $protochain");
4008         ruleset_create_chain($ruleset, $protochain);
4009
4010         foreach my $proto (split(/,/, $options->{layer2_protocols})) {
4011             ruleset_addrule($ruleset, $protochain, "-p $proto", '-j RETURN');
4012         }
4013         ruleset_addrule($ruleset, $protochain, '', '-j DROP');
4014     }
4015
4016     ruleset_addrule($ruleset, $tapchain, '', '-j ACCEPT');
4017
4018     ruleset_addrule($ruleset, 'PVEFW-FWBR-OUT', "-i $iface", "-j $tapchain");
4019 }
4020
4021 # the parameter $change_only_regex changes two things if defined:
4022 # * all chains not matching it will be left intact
4023 # * both the $active_chains hash and the returned status_hash have different
4024 #   structure (they contain a key named 'rules').
4025 sub get_ruleset_status {
4026     my ($ruleset, $active_chains, $digest_fn, $change_only_regex) = @_;
4027
4028     my $statushash = {};
4029
4030     foreach my $chain (sort keys %$ruleset) {
4031         my $rules = $ruleset->{$chain};
4032         my $sig = &$digest_fn($rules);
4033         my $oldsig;
4034
4035         $statushash->{$chain}->{sig} = $sig;
4036         if (defined($change_only_regex)) {
4037             $oldsig = $active_chains->{$chain}->{sig};
4038             $statushash->{$chain}->{rules} = $rules;
4039         } else {
4040             $oldsig = $active_chains->{$chain};
4041         }
4042         if (!defined($oldsig)) {
4043             $statushash->{$chain}->{action} = 'create';
4044         } else {
4045             if ($oldsig eq $sig) {
4046                 $statushash->{$chain}->{action} = 'exists';
4047             } else {
4048                 $statushash->{$chain}->{action} = 'update';
4049             }
4050         }
4051         if ($verbose) {
4052             print "$statushash->{$chain}->{action} $chain ($sig)\n";
4053             foreach my $cmd (@{$rules}) {
4054                 print "\t$cmd\n";
4055             }
4056         }
4057     }
4058
4059     foreach my $chain (sort keys %$active_chains) {
4060         next if defined($ruleset->{$chain});
4061         my $action = 'delete';
4062         my $sig = $active_chains->{$chain};
4063         if (defined($change_only_regex)) {
4064             $action = 'ignore' if ($chain !~ m/$change_only_regex/);
4065             $statushash->{$chain}->{rules} = $active_chains->{$chain}->{rules};
4066             $sig = $sig->{sig};
4067         }
4068         $statushash->{$chain}->{action} = $action;
4069         $statushash->{$chain}->{sig} = $sig;
4070         print "$action $chain ($sig)\n" if $verbose;
4071     }
4072
4073     return $statushash;
4074 }
4075
4076 sub print_sig_rule {
4077     my ($chain, $sig) = @_;
4078
4079     # We just use this to store a SHA1 checksum used to detect changes
4080     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
4081 }
4082
4083 sub get_ruleset_cmdlist {
4084     my ($ruleset, $iptablescmd, $table) = @_;
4085
4086     $table = 'filter' if !$table;
4087
4088     my $cmdlist = "*$table\n"; # we pass this to iptables-restore;
4089
4090     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd, $table);
4091     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest);
4092
4093     # create missing chains first
4094     foreach my $chain (sort keys %$ruleset) {
4095         my $stat = $statushash->{$chain};
4096         die "internal error" if !$stat;
4097         next if $stat->{action} ne 'create';
4098
4099         $cmdlist .= ":$chain - [0:0]\n";
4100     }
4101
4102     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4103         my $chain = "PVEFW-$h";
4104         if ($ruleset->{$chain} && !$hooks->{$h}) {
4105             $cmdlist .= "-A $h -j $chain\n";
4106         }
4107     }
4108
4109     foreach my $chain (sort keys %$ruleset) {
4110         my $stat = $statushash->{$chain};
4111         die "internal error" if !$stat;
4112
4113         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
4114             $cmdlist .= "-F $chain\n";
4115             foreach my $cmd (@{$ruleset->{$chain}}) {
4116                 $cmdlist .= "$cmd\n";
4117             }
4118             $cmdlist .= print_sig_rule($chain, $stat->{sig});
4119         } elsif ($stat->{action} eq 'delete') {
4120             die "internal error"; # this should not happen
4121         } elsif ($stat->{action} eq 'exists') {
4122             # do nothing
4123         } else {
4124             die "internal error - unknown status '$stat->{action}'";
4125         }
4126     }
4127
4128     foreach my $chain (keys %$statushash) {
4129         next if $statushash->{$chain}->{action} ne 'delete';
4130         $cmdlist .= "-F $chain\n";
4131     }
4132     foreach my $chain (keys %$statushash) {
4133         next if $statushash->{$chain}->{action} ne 'delete';
4134         next if $chain eq 'PVEFW-INPUT';
4135         next if $chain eq 'PVEFW-OUTPUT';
4136         next if $chain eq 'PVEFW-FORWARD';
4137         next if $chain eq 'PVEFW-PREROUTING';
4138         $cmdlist .= "-X $chain\n";
4139     }
4140
4141     my $changes = $cmdlist ne "*$table\n" ? 1 : 0;
4142
4143     $cmdlist .= "COMMIT\n";
4144
4145     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4146 }
4147
4148 my $pve_ebtables_chainname_regex = qr/PVEFW-\S+|(?:tap|veth)\d+i\d+-(?:IN|OUT)/;
4149
4150 sub get_ebtables_cmdlist {
4151     my ($ruleset) = @_;
4152
4153     my $changes = 0;
4154     my $cmdlist = "*filter\n";
4155
4156     my $active_chains = ebtables_get_chains();
4157     my $statushash = get_ruleset_status($ruleset, $active_chains,
4158                                         \&iptables_chain_digest,
4159                                         $pve_ebtables_chainname_regex);
4160
4161     # create chains first and make sure PVE rules are evaluated if active
4162     my $append_pve_to_forward = '-A FORWARD -j PVEFW-FORWARD';
4163     my $pve_include = 0;
4164     foreach my $chain (sort keys %$statushash) {
4165         next if ($statushash->{$chain}->{action} eq 'delete');
4166         $cmdlist .= ":$chain ACCEPT\n";
4167         $pve_include = 1 if ($chain eq 'PVEFW-FORWARD');
4168     }
4169
4170     foreach my $chain (sort keys %$statushash) {
4171         my $stat = $statushash->{$chain};
4172         $changes = 1 if ($stat->{action} !~ 'ignore|exists');
4173         next if ($stat->{action} eq 'delete');
4174
4175         foreach my $cmd (@{$statushash->{$chain}->{'rules'}}) {
4176             if ($chain eq 'FORWARD' && $cmd eq $append_pve_to_forward) {
4177                 next if ! $pve_include;
4178                 $pve_include = 0;
4179             }
4180             $cmdlist .= "$cmd\n";
4181         }
4182     }
4183     $cmdlist .= "$append_pve_to_forward\n" if $pve_include;
4184
4185     return wantarray ? ($cmdlist, $changes) : $cmdlist;
4186 }
4187
4188 sub get_ipset_cmdlist {
4189     my ($ruleset) = @_;
4190
4191     my $cmdlist = "";
4192
4193     my $delete_cmdlist = "";
4194
4195     my $active_chains = ipset_get_chains();
4196     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest);
4197
4198     # remove stale _swap chains
4199     foreach my $chain (keys %$active_chains) {
4200         if ($chain =~ m/^PVEFW-\S+_swap$/) {
4201             $cmdlist .= "destroy $chain\n";
4202         }
4203     }
4204
4205     foreach my $chain (keys %$ruleset) {
4206         my $stat = $statushash->{$chain};
4207         die "internal error" if !$stat;
4208
4209         if ($stat->{action} eq 'create') {
4210             foreach my $cmd (@{$ruleset->{$chain}}) {
4211                 $cmdlist .= "$cmd\n";
4212             }
4213         }
4214     }
4215
4216     foreach my $chain (keys %$ruleset) {
4217         my $stat = $statushash->{$chain};
4218         die "internal error" if !$stat;
4219
4220         if ($stat->{action} eq 'update') {
4221             my $chain_swap = $chain."_swap";
4222
4223             foreach my $cmd (@{$ruleset->{$chain}}) {
4224                 $cmd =~ s/$chain/$chain_swap/;
4225                 $cmdlist .= "$cmd\n";
4226             }
4227             $cmdlist .= "swap $chain_swap $chain\n";
4228             $cmdlist .= "flush $chain_swap\n";
4229             $cmdlist .= "destroy $chain_swap\n";
4230         }
4231     }
4232
4233      # the remove unused chains
4234     foreach my $chain (keys %$statushash) {
4235         next if $statushash->{$chain}->{action} ne 'delete';
4236
4237         $delete_cmdlist .= "flush $chain\n";
4238         $delete_cmdlist .= "destroy $chain\n";
4239     }
4240
4241     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
4242
4243     return ($cmdlist, $delete_cmdlist, $changes);
4244 }
4245
4246 sub apply_ruleset {
4247     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = @_;
4248
4249     enable_bridge_firewall();
4250
4251     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
4252         get_ipset_cmdlist($ipset_ruleset);
4253
4254     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset->{filter});
4255     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6->{filter}, "ip6tables");
4256     my ($ebtables_cmdlist, $ebtables_changes) = get_ebtables_cmdlist($ebtables_ruleset);
4257     my ($cmdlist_raw, $changes_raw) = get_ruleset_cmdlist($ruleset->{raw}, undef, 'raw');
4258     my ($cmdlistv6_raw, $changesv6_raw) = get_ruleset_cmdlist($rulesetv6->{raw}, "ip6tables", 'raw');
4259
4260     if ($verbose) {
4261         if ($ipset_changes) {
4262             print "ipset changes:\n";
4263             print $ipset_create_cmdlist if $ipset_create_cmdlist;
4264             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
4265         }
4266
4267         if ($changes) {
4268             print "iptables changes:\n";
4269             print $cmdlist;
4270         }
4271
4272         if ($changesv6) {
4273             print "ip6tables changes:\n";
4274             print $cmdlistv6;
4275         }
4276
4277         if ($changes_raw) {
4278             print "iptables table raw changes:\n";
4279             print $cmdlist_raw;
4280         }
4281
4282         if ($changesv6_raw) {
4283             print "ip6tables table raw changes:\n";
4284             print $cmdlistv6_raw;
4285         }
4286
4287         if ($ebtables_changes) {
4288             print "ebtables changes:\n";
4289             print $ebtables_cmdlist;
4290         }
4291     }
4292
4293     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
4294     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
4295
4296     ipset_restore_cmdlist($ipset_create_cmdlist);
4297
4298     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
4299     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
4300
4301     iptables_restore_cmdlist($cmdlist);
4302
4303     $tmpfile = "$pve_fw_status_dir/ip4cmdlistraw";
4304     PVE::Tools::file_set_contents($tmpfile, $cmdlist_raw || '');
4305
4306     iptables_restore_cmdlist($cmdlist_raw, 'raw');
4307
4308     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
4309     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
4310
4311     ip6tables_restore_cmdlist($cmdlistv6);
4312
4313     $tmpfile = "$pve_fw_status_dir/ip6cmdlistraw";
4314     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6_raw || '');
4315
4316     ip6tables_restore_cmdlist($cmdlistv6_raw, 'raw');
4317
4318     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
4319     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
4320
4321     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
4322
4323     ebtables_restore_cmdlist($ebtables_cmdlist);
4324
4325     $tmpfile = "$pve_fw_status_dir/ebtablescmdlist";
4326     PVE::Tools::file_set_contents($tmpfile, $ebtables_cmdlist || '');
4327
4328     # test: re-read status and check if everything is up to date
4329     my $ruleset_filter = $ruleset->{filter};
4330     my $active_chains = iptables_get_chains();
4331     my $statushash = get_ruleset_status($ruleset_filter, $active_chains, \&iptables_chain_digest);
4332
4333     my $errors;
4334     foreach my $chain (sort keys %$ruleset_filter) {
4335         my $stat = $statushash->{$chain};
4336         if ($stat->{action} ne 'exists') {
4337             warn "unable to update chain '$chain'\n";
4338             $errors = 1;
4339         }
4340     }
4341
4342     my $rulesetv6_filter = $rulesetv6->{filter};
4343     my $active_chainsv6 = iptables_get_chains("ip6tables");
4344     my $statushashv6 = get_ruleset_status($rulesetv6_filter, $active_chainsv6, \&iptables_chain_digest);
4345
4346     foreach my $chain (sort keys %$rulesetv6_filter) {
4347         my $stat = $statushashv6->{$chain};
4348         if ($stat->{action} ne 'exists') {
4349             warn "unable to update chain '$chain'\n";
4350             $errors = 1;
4351         }
4352     }
4353
4354     my $ruleset_raw = $ruleset->{raw};
4355     my $active_chains_raw = iptables_get_chains(undef, 'raw');
4356     my $statushash_raw = get_ruleset_status($ruleset_raw, $active_chains_raw, \&iptables_chain_digest);
4357
4358     foreach my $chain (sort keys %$ruleset_raw) {
4359         my $stat = $statushash_raw->{$chain};
4360         if ($stat->{action} ne 'exists') {
4361             warn "unable to update chain '$chain'\n";
4362             $errors = 1;
4363         }
4364     }
4365
4366     my $rulesetv6_raw = $rulesetv6->{raw};
4367     my $active_chainsv6_raw = iptables_get_chains("ip6tables", 'raw');
4368     my $statushashv6_raw = get_ruleset_status($rulesetv6_raw, $active_chainsv6_raw, \&iptables_chain_digest);
4369
4370     foreach my $chain (sort keys %$rulesetv6_raw) {
4371         my $stat = $statushashv6_raw->{$chain};
4372         if ($stat->{action} ne 'exists') {
4373             warn "unable to update chain '$chain'\n";
4374             $errors = 1;
4375         }
4376     }
4377
4378     my $active_ebtables_chains = ebtables_get_chains();
4379     my $ebtables_statushash = get_ruleset_status($ebtables_ruleset,
4380                                 $active_ebtables_chains, \&iptables_chain_digest,
4381                                 $pve_ebtables_chainname_regex);
4382
4383     foreach my $chain (sort keys %$ebtables_ruleset) {
4384         my $stat = $ebtables_statushash->{$chain};
4385         if ($stat->{action} ne 'exists') {
4386             warn "ebtables : unable to update chain '$chain'\n";
4387             $errors = 1;
4388         }
4389     }
4390
4391     die "unable to apply firewall changes\n" if $errors;
4392
4393     update_nf_conntrack_max($hostfw_conf);
4394
4395     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
4396
4397     update_nf_conntrack_tcp_timeout_syn_recv($hostfw_conf);
4398
4399     update_nf_conntrack_logging($hostfw_conf);
4400 }
4401
4402 sub update_nf_conntrack_max {
4403     my ($hostfw_conf) = @_;
4404
4405     my $max = 262144; # reasonable default (2^16 * 4), see nf_conntrack-sysctl docs
4406
4407     my $options = $hostfw_conf->{options} || {};
4408
4409     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
4410         $max = $options->{nf_conntrack_max};
4411         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
4412     }
4413
4414     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
4415     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
4416
4417     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
4418
4419     if ($current != $max) {
4420         my $hashsize = int($max/4);
4421         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
4422         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
4423     }
4424 }
4425
4426 sub update_nf_conntrack_tcp_timeout_established {
4427     my ($hostfw_conf) = @_;
4428
4429     my $options = $hostfw_conf->{options} || {};
4430
4431     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
4432
4433     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
4434 }
4435
4436 sub update_nf_conntrack_tcp_timeout_syn_recv {
4437     my ($hostfw_conf) = @_;
4438
4439     my $options = $hostfw_conf->{options} || {};
4440
4441     my $value = defined($options->{nf_conntrack_tcp_timeout_syn_recv}) ? $options->{nf_conntrack_tcp_timeout_syn_recev} : 60;
4442
4443     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_syn_recv", $value);
4444 }
4445
4446 my $log_nf_conntrack_enabled = undef;
4447 sub update_nf_conntrack_logging {
4448     my ($hostfw_conf) = @_;
4449
4450     my $options = $hostfw_conf->{options} || {};
4451     my $value = $options->{log_nf_conntrack} || 0;
4452     if (!defined($log_nf_conntrack_enabled)
4453         || $value != $log_nf_conntrack_enabled)
4454     {
4455         my $tmpfile = "$pve_fw_status_dir/log_nf_conntrack";
4456         PVE::Tools::file_set_contents($tmpfile, $value);
4457
4458         run_command([qw(systemctl try-reload-or-restart pvefw-logger.service)]);
4459         $log_nf_conntrack_enabled = $value;
4460     }
4461 }
4462
4463 sub remove_pvefw_chains {
4464
4465     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
4466     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
4467     PVE::Firewall::remove_pvefw_chains_iptables("iptables", "raw");
4468     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables", "raw");
4469     PVE::Firewall::remove_pvefw_chains_ipset();
4470     PVE::Firewall::remove_pvefw_chains_ebtables();
4471
4472 }
4473
4474 sub remove_pvefw_chains_iptables {
4475     my ($iptablescmd, $table) = @_;
4476
4477     $table = 'filter' if !$table;
4478
4479     my ($chash, $hooks) = iptables_get_chains($iptablescmd, $table);
4480     my $cmdlist = "*$table\n";
4481
4482     foreach my $h (qw(INPUT OUTPUT FORWARD PREROUTING)) {
4483         if ($hooks->{$h}) {
4484             $cmdlist .= "-D $h -j PVEFW-$h\n";
4485         }
4486     }
4487
4488     foreach my $chain (keys %$chash) {
4489         $cmdlist .= "-F $chain\n";
4490     }
4491
4492     foreach my $chain (keys %$chash) {
4493         $cmdlist .= "-X $chain\n";
4494     }
4495     $cmdlist .= "COMMIT\n";
4496
4497     if($iptablescmd eq "ip6tables") {
4498         ip6tables_restore_cmdlist($cmdlist, $table);
4499     } else {
4500         iptables_restore_cmdlist($cmdlist, $table);
4501     }
4502 }
4503
4504 sub remove_pvefw_chains_ipset {
4505
4506     my $ipset_chains = ipset_get_chains();
4507
4508     my $cmdlist = "";
4509
4510     foreach my $chain (keys %$ipset_chains) {
4511         $cmdlist .= "flush $chain\n";
4512         $cmdlist .= "destroy $chain\n";
4513     }
4514
4515     ipset_restore_cmdlist($cmdlist) if $cmdlist;
4516 }
4517
4518 sub remove_pvefw_chains_ebtables {
4519     # apply empty ruleset = remove all our chains
4520     ebtables_restore_cmdlist(get_ebtables_cmdlist({}));
4521 }
4522
4523 sub init {
4524     my $cluster_conf = load_clusterfw_conf();
4525     my $cluster_options = $cluster_conf->{options};
4526     my $enable = $cluster_options->{enable};
4527
4528     return if !$enable;
4529
4530     # load required modules here
4531 }
4532
4533 sub update {
4534     my $code = sub {
4535
4536         my $cluster_conf = load_clusterfw_conf();
4537         my $cluster_options = $cluster_conf->{options};
4538
4539         if (!$cluster_options->{enable}) {
4540             PVE::Firewall::remove_pvefw_chains();
4541             return;
4542         }
4543
4544         my $hostfw_conf = load_hostfw_conf($cluster_conf);
4545
4546         my ($ruleset, $ipset_ruleset, $rulesetv6, $ebtables_ruleset) = compile($cluster_conf, $hostfw_conf);
4547
4548         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $ebtables_ruleset);
4549     };
4550
4551     run_locked($code);
4552 }
4553
4554 1;