src/PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use POSIX;
   6 use Data::Dumper;
   7 use Digest::SHA;
   8 use Socket qw(AF_INET6 inet_ntop inet_pton);
   9 use PVE::INotify;
  10 use PVE::Exception qw(raise raise_param_exc);
  11 use PVE::JSONSchema qw(register_standard_option get_standard_option);
  12 use PVE::Cluster;
  13 use PVE::ProcFSTools;
  14 use PVE::Tools qw($IPV4RE $IPV6RE);
  15 use PVE::Network;
  16 use PVE::SafeSyslog;
  17 use File::Basename;
  18 use File::Path;
  19 use IO::File;
  20 use Net::IP;
  21 use PVE::Tools qw(run_command lock_file dir_glob_foreach);
  22 use Encode;
  23 use Storable qw(dclone);
  24
  25 my $hostfw_conf_filename = "/etc/pve/local/host.fw";
  26 my $pvefw_conf_dir = "/etc/pve/firewall";
  27 my $clusterfw_conf_filename = "$pvefw_conf_dir/cluster.fw";
  28
  29 # dynamically include PVE::QemuServer and PVE::LXC
  30 # to avoid dependency problems
  31 my $have_qemu_server;
  32 eval {
  33     require PVE::QemuServer;
  34     require PVE::QemuConfig;
  35     $have_qemu_server = 1;
  36 };
  37
  38 my $have_lxc;
  39 eval {
  40     require PVE::LXC;
  41     $have_lxc = 1;
  42 };
  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
 131 my $pve_fw_lock_filename = "/var/lock/pvefw.lck";
 132
 133 my $default_log_level = 'nolog'; # avoid logs by default
 134
 135 my $log_level_hash = {
 136     debug => 7,
 137     info => 6,
 138     notice => 5,
 139     warning => 4,
 140     err => 3,
 141     crit => 2,
 142     alert => 1,
 143     emerg => 0,
 144 };
 145
 146 # %rule
 147 #
 148 # name => optional
 149 # enable => [0|1]
 150 # action =>
 151 # proto =>
 152 # sport => port[,port[,port]].. or port:port
 153 # dport => port[,port[,port]].. or port:port
 154 # log => optional, loglevel
 155 # logmsg => optional, logmsg - overwrites default
 156 # iface_in => incomin interface
 157 # iface_out => outgoing interface
 158 # match => optional, overwrites generation of match
 159 # target => optional, overwrites action
 160
 161 # we need to overwrite some macros for ipv6
 162 my $pve_ipv6fw_macros = {
 163     'Ping' => [
 164         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 165     ],
 166     'NeighborDiscovery' => [
 167         "IPv6 neighbor solicitation, neighbor and router advertisement",
 168         { action => 'PARAM', proto => 'icmpv6', dport => 'router-solicitation' },
 169         { action => 'PARAM', proto => 'icmpv6', dport => 'router-advertisement' },
 170         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-solicitation' },
 171         { action => 'PARAM', proto => 'icmpv6', dport => 'neighbor-advertisement' },
 172     ],
 173     'DHCPv6' => [
 174         "DHCPv6 traffic",
 175         { action => 'PARAM', proto => 'udp', dport => '546:547', sport => '546:547' },
 176     ],
 177     'Trcrt' => [
 178         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 179         { action => 'PARAM', proto => 'icmpv6', dport => 'echo-request' },
 180     ],
 181  };
 182
 183 # imported/converted from: /usr/share/shorewall/macro.*
 184 my $pve_fw_macros = {
 185     'Amanda' => [
 186         "Amanda Backup",
 187         { action => 'PARAM', proto => 'udp', dport => '10080' },
 188         { action => 'PARAM', proto => 'tcp', dport => '10080' },
 189     ],
 190     'Auth' => [
 191         "Auth (identd) traffic",
 192         { action => 'PARAM', proto => 'tcp', dport => '113' },
 193     ],
 194     'BGP' => [
 195         "Border Gateway Protocol traffic",
 196         { action => 'PARAM', proto => 'tcp', dport => '179' },
 197     ],
 198     'BitTorrent' => [
 199         "BitTorrent traffic for BitTorrent 3.1 and earlier",
 200         { action => 'PARAM', proto => 'tcp', dport => '6881:6889' },
 201         { action => 'PARAM', proto => 'udp', dport => '6881' },
 202     ],
 203     'BitTorrent32' => [
 204         "BitTorrent traffic for BitTorrent 3.2 and later",
 205         { action => 'PARAM', proto => 'tcp', dport => '6881:6999' },
 206         { action => 'PARAM', proto => 'udp', dport => '6881' },
 207     ],
 208     'Ceph' => [
 209         "Ceph Storage Cluster traffic (Ceph Monitors, OSD & MDS Deamons)",
 210         { action => 'PARAM', proto => 'tcp', dport => '6789' },
 211         { action => 'PARAM', proto => 'tcp', dport => '6800:7300' },
 212     ],
 213     'CVS' => [
 214         "Concurrent Versions System pserver traffic",
 215         { action => 'PARAM', proto => 'tcp', dport => '2401' },
 216     ],
 217     'Citrix' => [
 218         "Citrix/ICA traffic (ICA, ICA Browser, CGP)",
 219         { action => 'PARAM', proto => 'tcp', dport => '1494' },
 220         { action => 'PARAM', proto => 'udp', dport => '1604' },
 221         { action => 'PARAM', proto => 'tcp', dport => '2598' },
 222     ],
 223     'DAAP' => [
 224         "Digital Audio Access Protocol traffic (iTunes, Rythmbox daemons)",
 225         { action => 'PARAM', proto => 'tcp', dport => '3689' },
 226         { action => 'PARAM', proto => 'udp', dport => '3689' },
 227     ],
 228     'DCC' => [
 229         "Distributed Checksum Clearinghouse spam filtering mechanism",
 230         { action => 'PARAM', proto => 'tcp', dport => '6277' },
 231     ],
 232     'DHCPfwd' => [
 233         "Forwarded DHCP traffic",
 234         { action => 'PARAM', proto => 'udp', dport => '67:68', sport => '67:68' },
 235     ],
 236     'DNS' => [
 237         "Domain Name System traffic (upd and tcp)",
 238         { action => 'PARAM', proto => 'udp', dport => '53' },
 239         { action => 'PARAM', proto => 'tcp', dport => '53' },
 240     ],
 241     'Distcc' => [
 242         "Distributed Compiler service",
 243         { action => 'PARAM', proto => 'tcp', dport => '3632' },
 244     ],
 245     'FTP' => [
 246         "File Transfer Protocol",
 247         { action => 'PARAM', proto => 'tcp', dport => '21' },
 248     ],
 249     'Finger' => [
 250         "Finger protocol (RFC 742)",
 251         { action => 'PARAM', proto => 'tcp', dport => '79' },
 252     ],
 253     'GNUnet' => [
 254         "GNUnet secure peer-to-peer networking traffic",
 255         { action => 'PARAM', proto => 'tcp', dport => '2086' },
 256         { action => 'PARAM', proto => 'udp', dport => '2086' },
 257         { action => 'PARAM', proto => 'tcp', dport => '1080' },
 258         { action => 'PARAM', proto => 'udp', dport => '1080' },
 259     ],
 260     'GRE' => [
 261         "Generic Routing Encapsulation tunneling protocol",
 262         { action => 'PARAM', proto => '47' },
 263     ],
 264     'Git' => [
 265         "Git distributed revision control traffic",
 266         { action => 'PARAM', proto => 'tcp', dport => '9418' },
 267     ],
 268     'HKP' => [
 269         "OpenPGP HTTP keyserver protocol traffic",
 270         { action => 'PARAM', proto => 'tcp', dport => '11371' },
 271     ],
 272     'HTTP' => [
 273         "Hypertext Transfer Protocol (WWW)",
 274         { action => 'PARAM', proto => 'tcp', dport => '80' },
 275     ],
 276     'HTTPS' => [
 277         "Hypertext Transfer Protocol (WWW) over SSL",
 278         { action => 'PARAM', proto => 'tcp', dport => '443' },
 279     ],
 280     'ICPV2' => [
 281         "Internet Cache Protocol V2 (Squid) traffic",
 282         { action => 'PARAM', proto => 'udp', dport => '3130' },
 283     ],
 284     'ICQ' => [
 285         "AOL Instant Messenger traffic",
 286         { action => 'PARAM', proto => 'tcp', dport => '5190' },
 287     ],
 288     'IMAP' => [
 289         "Internet Message Access Protocol",
 290         { action => 'PARAM', proto => 'tcp', dport => '143' },
 291     ],
 292     'IMAPS' => [
 293         "Internet Message Access Protocol over SSL",
 294         { action => 'PARAM', proto => 'tcp', dport => '993' },
 295     ],
 296     'IPIP' => [
 297         "IPIP capsulation traffic",
 298         { action => 'PARAM', proto => '94' },
 299     ],
 300     'IPsec' => [
 301         "IPsec traffic",
 302         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 303         { action => 'PARAM', proto => '50' },
 304     ],
 305     'IPsecah' => [
 306         "IPsec authentication (AH) traffic",
 307         { action => 'PARAM', proto => 'udp', dport => '500', sport => '500' },
 308         { action => 'PARAM', proto => '51' },
 309     ],
 310     'IPsecnat' => [
 311         "IPsec traffic and Nat-Traversal",
 312         { action => 'PARAM', proto => 'udp', dport => '500' },
 313         { action => 'PARAM', proto => 'udp', dport => '4500' },
 314         { action => 'PARAM', proto => '50' },
 315     ],
 316     'IRC' => [
 317         "Internet Relay Chat traffic",
 318         { action => 'PARAM', proto => 'tcp', dport => '6667' },
 319     ],
 320     'Jetdirect' => [
 321         "HP Jetdirect printing",
 322         { action => 'PARAM', proto => 'tcp', dport => '9100' },
 323     ],
 324     'L2TP' => [
 325         "Layer 2 Tunneling Protocol traffic",
 326         { action => 'PARAM', proto => 'udp', dport => '1701' },
 327     ],
 328     'LDAP' => [
 329         "Lightweight Directory Access Protocol traffic",
 330         { action => 'PARAM', proto => 'tcp', dport => '389' },
 331     ],
 332     'LDAPS' => [
 333         "Secure Lightweight Directory Access Protocol traffic",
 334         { action => 'PARAM', proto => 'tcp', dport => '636' },
 335     ],
 336     'MSNP' => [
 337         "Microsoft Notification Protocol",
 338         { action => 'PARAM', proto => 'tcp', dport => '1863' },
 339     ],
 340     'MSSQL' => [
 341         "Microsoft SQL Server",
 342         { action => 'PARAM', proto => 'tcp', dport => '1433' },
 343     ],
 344     'Mail' => [
 345         "Mail traffic (SMTP, SMTPS, Submission)",
 346         { action => 'PARAM', proto => 'tcp', dport => '25' },
 347         { action => 'PARAM', proto => 'tcp', dport => '465' },
 348         { action => 'PARAM', proto => 'tcp', dport => '587' },
 349     ],
 350     'MDNS' => [
 351         "Multicast DNS",
 352         { action => 'PARAM', proto => 'udp', dport => '5353' },
 353     ],
 354     'Munin' => [
 355         "Munin networked resource monitoring traffic",
 356         { action => 'PARAM', proto => 'tcp', dport => '4949' },
 357     ],
 358     'MySQL' => [
 359         "MySQL server",
 360         { action => 'PARAM', proto => 'tcp', dport => '3306' },
 361     ],
 362     'NNTP' => [
 363         "NNTP traffic (Usenet).",
 364         { action => 'PARAM', proto => 'tcp', dport => '119' },
 365     ],
 366     'NNTPS' => [
 367         "Encrypted NNTP traffic (Usenet)",
 368         { action => 'PARAM', proto => 'tcp', dport => '563' },
 369     ],
 370     'NTP' => [
 371         "Network Time Protocol (ntpd)",
 372         { action => 'PARAM', proto => 'udp', dport => '123' },
 373     ],
 374     'OSPF' => [
 375         "OSPF multicast traffic",
 376         { action => 'PARAM', proto => '89' },
 377     ],
 378     'OpenVPN' => [
 379         "OpenVPN traffic",
 380         { action => 'PARAM', proto => 'udp', dport => '1194' },
 381     ],
 382     'PCA' => [
 383         "Symantec PCAnywere (tm)",
 384         { action => 'PARAM', proto => 'udp', dport => '5632' },
 385         { action => 'PARAM', proto => 'tcp', dport => '5631' },
 386     ],
 387     'POP3' => [
 388         "POP3 traffic",
 389         { action => 'PARAM', proto => 'tcp', dport => '110' },
 390     ],
 391     'POP3S' => [
 392         "Encrypted POP3 traffic",
 393         { action => 'PARAM', proto => 'tcp', dport => '995' },
 394     ],
 395     'PPtP' => [
 396         "Point-to-Point Tunneling Protocol",
 397         { action => 'PARAM', proto => '47' },
 398         { action => 'PARAM', proto => 'tcp', dport => '1723' },
 399     ],
 400     'Ping' => [
 401         "ICMP echo request",
 402         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 403     ],
 404     'PostgreSQL' => [
 405         "PostgreSQL server",
 406         { action => 'PARAM', proto => 'tcp', dport => '5432' },
 407     ],
 408     'Printer' => [
 409         "Line Printer protocol printing",
 410         { action => 'PARAM', proto => 'tcp', dport => '515' },
 411     ],
 412     'RDP' => [
 413         "Microsoft Remote Desktop Protocol traffic",
 414         { action => 'PARAM', proto => 'tcp', dport => '3389' },
 415     ],
 416     'RIP' => [
 417         "Routing Information Protocol (bidirectional)",
 418         { action => 'PARAM', proto => 'udp', dport => '520' },
 419     ],
 420     'RNDC' => [
 421         "BIND remote management protocol",
 422         { action => 'PARAM', proto => 'tcp', dport => '953' },
 423     ],
 424     'Razor' => [
 425         "Razor Antispam System",
 426         { action => 'ACCEPT', proto => 'tcp', dport => '2703' },
 427     ],
 428     'Rdate' => [
 429         "Remote time retrieval (rdate)",
 430         { action => 'PARAM', proto => 'tcp', dport => '37' },
 431     ],
 432     'Rsync' => [
 433         "Rsync server",
 434         { action => 'PARAM', proto => 'tcp', dport => '873' },
 435     ],
 436     'SANE' => [
 437         "SANE network scanning",
 438         { action => 'PARAM', proto => 'tcp', dport => '6566' },
 439     ],
 440     'SMB' => [
 441         "Microsoft SMB traffic",
 442         { action => 'PARAM', proto => 'udp', dport => '135,445' },
 443         { action => 'PARAM', proto => 'udp', dport => '137:139' },
 444         { action => 'PARAM', proto => 'udp', dport => '1024:65535', sport => '137' },
 445         { action => 'PARAM', proto => 'tcp', dport => '135,139,445' },
 446     ],
 447     'SMBswat' => [
 448         "Samba Web Administration Tool",
 449         { action => 'PARAM', proto => 'tcp', dport => '901' },
 450     ],
 451     'SMTP' => [
 452         "Simple Mail Transfer Protocol",
 453         { action => 'PARAM', proto => 'tcp', dport => '25' },
 454     ],
 455     'SMTPS' => [
 456         "Encrypted Simple Mail Transfer Protocol",
 457         { action => 'PARAM', proto => 'tcp', dport => '465' },
 458     ],
 459     'SNMP' => [
 460         "Simple Network Management Protocol",
 461         { action => 'PARAM', proto => 'udp', dport => '161:162' },
 462         { action => 'PARAM', proto => 'tcp', dport => '161' },
 463     ],
 464     'SPAMD' => [
 465         "Spam Assassin SPAMD traffic",
 466         { action => 'PARAM', proto => 'tcp', dport => '783' },
 467     ],
 468     'SSH' => [
 469         "Secure shell traffic",
 470         { action => 'PARAM', proto => 'tcp', dport => '22' },
 471     ],
 472     'SVN' => [
 473         "Subversion server (svnserve)",
 474         { action => 'PARAM', proto => 'tcp', dport => '3690' },
 475     ],
 476     'SixXS' => [
 477         "SixXS IPv6 Deployment and Tunnel Broker",
 478         { action => 'PARAM', proto => 'tcp', dport => '3874' },
 479         { action => 'PARAM', proto => 'udp', dport => '3740' },
 480         { action => 'PARAM', proto => '41' },
 481         { action => 'PARAM', proto => 'udp', dport => '5072,8374' },
 482     ],
 483     'Squid' => [
 484         "Squid web proxy traffic",
 485         { action => 'PARAM', proto => 'tcp', dport => '3128' },
 486     ],
 487     'Submission' => [
 488         "Mail message submission traffic",
 489         { action => 'PARAM', proto => 'tcp', dport => '587' },
 490     ],
 491     'Syslog' => [
 492         "Syslog protocol (RFC 5424) traffic",
 493         { action => 'PARAM', proto => 'udp', dport => '514' },
 494         { action => 'PARAM', proto => 'tcp', dport => '514' },
 495     ],
 496     'TFTP' => [
 497         "Trivial File Transfer Protocol traffic",
 498         { action => 'PARAM', proto => 'udp', dport => '69' },
 499     ],
 500     'Telnet' => [
 501         "Telnet traffic",
 502         { action => 'PARAM', proto => 'tcp', dport => '23' },
 503     ],
 504     'Telnets' => [
 505         "Telnet over SSL",
 506         { action => 'PARAM', proto => 'tcp', dport => '992' },
 507     ],
 508     'Time' => [
 509         "RFC 868 Time protocol",
 510         { action => 'PARAM', proto => 'tcp', dport => '37' },
 511     ],
 512     'Trcrt' => [
 513         "Traceroute (for up to 30 hops) traffic",
 514         { action => 'PARAM', proto => 'udp', dport => '33434:33524' },
 515         { action => 'PARAM', proto => 'icmp', dport => 'echo-request' },
 516     ],
 517     'VNC' => [
 518         "VNC traffic for VNC display's 0 - 99",
 519         { action => 'PARAM', proto => 'tcp', dport => '5900:5999' },
 520     ],
 521     'VNCL' => [
 522         "VNC traffic from Vncservers to Vncviewers in listen mode",
 523         { action => 'PARAM', proto => 'tcp', dport => '5500' },
 524     ],
 525     'Web' => [
 526         "WWW traffic (HTTP and HTTPS)",
 527         { action => 'PARAM', proto => 'tcp', dport => '80' },
 528         { action => 'PARAM', proto => 'tcp', dport => '443' },
 529     ],
 530     'Webcache' => [
 531         "Web Cache/Proxy traffic (port 8080)",
 532         { action => 'PARAM', proto => 'tcp', dport => '8080' },
 533     ],
 534     'Webmin' => [
 535         "Webmin traffic",
 536         { action => 'PARAM', proto => 'tcp', dport => '10000' },
 537     ],
 538     'Whois' => [
 539         "Whois (nicname, RFC 3912) traffic",
 540         { action => 'PARAM', proto => 'tcp', dport => '43' },
 541     ],
 542 };
 543
 544 my $pve_fw_parsed_macros;
 545 my $pve_fw_macro_descr;
 546 my $pve_fw_macro_ipversion = {};
 547 my $pve_fw_preferred_macro_names = {};
 548
 549 my $FWACCEPTMARK_ON  = "0x80000000/0x80000000";
 550 my $FWACCEPTMARK_OFF = "0x00000000/0x80000000";
 551
 552 my $pve_std_chains = {};
 553 my $pve_std_chains_conf = {};
 554 $pve_std_chains_conf->{4} = {
 555     'PVEFW-SET-ACCEPT-MARK' => [
 556         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 557     ],
 558     'PVEFW-DropBroadcast' => [
 559         # same as shorewall 'Broadcast'
 560         # simply DROP BROADCAST/MULTICAST/ANYCAST
 561         # we can use this to reduce logging
 562         { action => 'DROP', dsttype => 'BROADCAST' },
 563         { action => 'DROP', dsttype => 'MULTICAST' },
 564         { action => 'DROP', dsttype => 'ANYCAST' },
 565         { action => 'DROP', dest => '224.0.0.0/4' },
 566     ],
 567     'PVEFW-reject' => [
 568         # same as shorewall 'reject'
 569         { action => 'DROP', dsttype => 'BROADCAST' },
 570         { action => 'DROP', source => '224.0.0.0/4' },
 571         { action => 'DROP', proto => 'icmp' },
 572         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 573         { match => '-p udp', target => '-j REJECT --reject-with icmp-port-unreachable' },
 574         { match => '-p icmp', target => '-j REJECT --reject-with icmp-host-unreachable' },
 575         { target => '-j REJECT --reject-with icmp-host-prohibited' },
 576     ],
 577     'PVEFW-Drop' => [
 578         # same as shorewall 'Drop', which is equal to DROP,
 579         # but REJECT/DROP some packages to reduce logging,
 580         # and ACCEPT critical ICMP types
 581         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 582         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 583         { action => 'PVEFW-DropBroadcast' },
 584         # ACCEPT critical ICMP types
 585         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 586         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 587         # Drop packets with INVALID state
 588         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 589         # Drop Microsoft SMB noise
 590         { action => 'DROP', proto => 'udp', dport => '135,445' },
 591         { action => 'DROP', proto => 'udp', dport => '137:139' },
 592         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 593         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 594         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 595         # Drop new/NotSyn traffic so that it doesn't get logged
 596         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 597         # Drop DNS replies
 598         { action => 'DROP', proto => 'udp', sport => 53 },
 599     ],
 600     'PVEFW-Reject' => [
 601         # same as shorewall 'Reject', which is equal to Reject,
 602         # but REJECT/DROP some packages to reduce logging,
 603         # and ACCEPT critical ICMP types
 604         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 605         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 606         { action => 'PVEFW-DropBroadcast' },
 607         # ACCEPT critical ICMP types
 608         { action => 'ACCEPT', proto => 'icmp', dport => 'fragmentation-needed' },
 609         { action => 'ACCEPT', proto => 'icmp', dport => 'time-exceeded' },
 610         # Drop packets with INVALID state
 611         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 612         # Drop Microsoft SMB noise
 613         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 614         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139'},
 615         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 616         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 617         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 618         # Drop new/NotSyn traffic so that it doesn't get logged
 619         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 620         # Drop DNS replies
 621         { action => 'DROP', proto => 'udp', sport => 53 },
 622     ],
 623     'PVEFW-tcpflags' => [
 624         # same as shorewall tcpflags action.
 625         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 626         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 627         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 628         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 629         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 630         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 631     ],
 632     'PVEFW-smurfs' => [
 633         # same as shorewall smurfs action
 634         # Filter packets for smurfs (packets with a broadcast address as the source).
 635         { match => '-s 0.0.0.0/32', target => '-j RETURN' }, # allow DHCP
 636         { match => '-m addrtype --src-type BROADCAST', target => '-g PVEFW-smurflog' },
 637         { match => '-s 224.0.0.0/4', target => '-g PVEFW-smurflog' },
 638     ],
 639     'PVEFW-smurflog' => [
 640         { action => 'DROP', logmsg => 'DROP: ' },
 641     ],
 642     'PVEFW-logflags' => [
 643         { action => 'DROP', logmsg => 'DROP: ' },
 644     ],
 645 };
 646
 647 $pve_std_chains_conf->{6} = {
 648     'PVEFW-SET-ACCEPT-MARK' => [
 649         { target => "-j MARK --set-mark $FWACCEPTMARK_ON" },
 650     ],
 651     'PVEFW-DropBroadcast' => [
 652         # same as shorewall 'Broadcast'
 653         # simply DROP BROADCAST/MULTICAST/ANYCAST
 654         # we can use this to reduce logging
 655         #{ action => 'DROP', dsttype => 'BROADCAST' }, #no broadcast in ipv6
 656         # ipv6 addrtype does not work with kernel 2.6.32
 657         #{ action => 'DROP', dsttype => 'MULTICAST' },
 658         #{ action => 'DROP', dsttype => 'ANYCAST' },
 659         { action => 'DROP', dest => 'ff00::/8' },
 660         #{ action => 'DROP', dest => '224.0.0.0/4' },
 661     ],
 662     'PVEFW-reject' => [
 663         # same as shorewall 'reject'
 664         #{ action => 'DROP', dsttype => 'BROADCAST' },
 665         #{ action => 'DROP', source => '224.0.0.0/4' },
 666         { action => 'DROP', proto => 'icmpv6' },
 667         { match => '-p tcp', target => '-j REJECT --reject-with tcp-reset' },
 668         #"-p udp -j REJECT --reject-with icmp-port-unreachable",
 669         #"-p icmp -j REJECT --reject-with icmp-host-unreachable",
 670         #"-j REJECT --reject-with icmp-host-prohibited",
 671     ],
 672     'PVEFW-Drop' => [
 673         # same as shorewall 'Drop', which is equal to DROP,
 674         # but REJECT/DROP some packages to reduce logging,
 675         # and ACCEPT critical ICMP types
 676         { action => 'PVEFW-reject', proto => 'tcp', dport => '43' }, # REJECT 'auth'
 677         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 678         { action => 'PVEFW-DropBroadcast' },
 679         # ACCEPT critical ICMP types
 680         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 681         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 682         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 683         # Drop packets with INVALID state
 684         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 685         # Drop Microsoft SMB noise
 686         { action => 'DROP', proto => 'udp', dport => '135,445' },
 687         { action => 'DROP', proto => 'udp', dport => '137:139'},
 688         { action => 'DROP', proto => 'udp', dport => '1024:65535', sport => 137 },
 689         { action => 'DROP', proto => 'tcp', dport => '135,139,445' },
 690         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 691         # Drop new/NotSyn traffic so that it doesn't get logged
 692         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 693         # Drop DNS replies
 694         { action => 'DROP', proto => 'udp', sport => 53 },
 695     ],
 696     'PVEFW-Reject' => [
 697         # same as shorewall 'Reject', which is equal to Reject,
 698         # but REJECT/DROP some packages to reduce logging,
 699         # and ACCEPT critical ICMP types
 700         { action => 'PVEFW-reject',  proto => 'tcp', dport => '43' }, # REJECT 'auth'
 701         # we are not interested in BROADCAST/MULTICAST/ANYCAST
 702         { action => 'PVEFW-DropBroadcast' },
 703         # ACCEPT critical ICMP types
 704         { action => 'ACCEPT', proto => 'icmpv6', dport => 'destination-unreachable' },
 705         { action => 'ACCEPT', proto => 'icmpv6', dport => 'time-exceeded' },
 706         { action => 'ACCEPT', proto => 'icmpv6', dport => 'packet-too-big' },
 707         # Drop packets with INVALID state
 708         { action => 'DROP', match => '-m conntrack --ctstate INVALID', },
 709         # Drop Microsoft SMB noise
 710         { action => 'PVEFW-reject', proto => 'udp', dport => '135,445' },
 711         { action => 'PVEFW-reject', proto => 'udp', dport => '137:139' },
 712         { action => 'PVEFW-reject', proto => 'udp', dport => '1024:65535', sport => 137 },
 713         { action => 'PVEFW-reject', proto => 'tcp', dport => '135,139,445' },
 714         { action => 'DROP', proto => 'udp', dport => 1900 }, # UPnP
 715         # Drop new/NotSyn traffic so that it doesn't get logged
 716         { action => 'DROP', match => '-p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN' },
 717         # Drop DNS replies
 718         { action => 'DROP', proto => 'udp', sport => 53 },
 719     ],
 720     'PVEFW-tcpflags' => [
 721         # same as shorewall tcpflags action.
 722         # Packets arriving on this interface are checked for som illegal combinations of TCP flags
 723         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,PSH,URG', target => '-g PVEFW-logflags' },
 724         { match => '-p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE', target => '-g PVEFW-logflags' },
 725         { match => '-p tcp -m tcp --tcp-flags SYN,RST SYN,RST', target => '-g PVEFW-logflags' },
 726         { match => '-p tcp -m tcp --tcp-flags FIN,SYN FIN,SYN', target => '-g PVEFW-logflags' },
 727         { match => '-p tcp -m tcp --sport 0 --tcp-flags FIN,SYN,RST,ACK SYN', target => '-g PVEFW-logflags' },
 728     ],
 729     'PVEFW-logflags' => [
 730         { action => 'DROP', logmsg => 'DROP: ' },
 731     ],
 732 };
 733
 734 # iptables -p icmp -h
 735 my $icmp_type_names = {
 736     any => 1,
 737     'echo-reply' => 1,
 738     'destination-unreachable' => 1,
 739     'network-unreachable' => 1,
 740     'host-unreachable' => 1,
 741     'protocol-unreachable' => 1,
 742     'port-unreachable' => 1,
 743     'fragmentation-needed' => 1,
 744     'source-route-failed' => 1,
 745     'network-unknown' => 1,
 746     'host-unknown' => 1,
 747     'network-prohibited' => 1,
 748     'host-prohibited' => 1,
 749     'TOS-network-unreachable' => 1,
 750     'TOS-host-unreachable' => 1,
 751     'communication-prohibited' => 1,
 752     'host-precedence-violation' => 1,
 753     'precedence-cutoff' => 1,
 754     'source-quench' => 1,
 755     'redirect' => 1,
 756     'network-redirect' => 1,
 757     'host-redirect' => 1,
 758     'TOS-network-redirect' => 1,
 759     'TOS-host-redirect' => 1,
 760     'echo-request' => 1,
 761     'router-advertisement' => 1,
 762     'router-solicitation' => 1,
 763     'time-exceeded' => 1,
 764     'ttl-zero-during-transit' => 1,
 765     'ttl-zero-during-reassembly' => 1,
 766     'parameter-problem' => 1,
 767     'ip-header-bad' => 1,
 768     'required-option-missing' => 1,
 769     'timestamp-request' => 1,
 770     'timestamp-reply' => 1,
 771     'address-mask-request' => 1,
 772     'address-mask-reply' => 1,
 773 };
 774
 775 # ip6tables -p icmpv6 -h
 776
 777 my $icmpv6_type_names = {
 778     'any' => 1,
 779     'destination-unreachable' => 1,
 780     'no-route' => 1,
 781     'communication-prohibited' => 1,
 782     'address-unreachable' => 1,
 783     'port-unreachable' => 1,
 784     'packet-too-big' => 1,
 785     'time-exceeded' => 1,
 786     'ttl-zero-during-transit' => 1,
 787     'ttl-zero-during-reassembly' => 1,
 788     'parameter-problem' => 1,
 789     'bad-header' => 1,
 790     'unknown-header-type' => 1,
 791     'unknown-option' => 1,
 792     'echo-request' => 1,
 793     'echo-reply' => 1,
 794     'router-solicitation' => 1,
 795     'router-advertisement' => 1,
 796     'neighbor-solicitation' => 1,
 797     'neighbour-solicitation' => 1,
 798     'neighbor-advertisement' => 1,
 799     'neighbour-advertisement' => 1,
 800     'redirect' => 1,
 801 };
 802
 803 sub init_firewall_macros {
 804
 805     $pve_fw_parsed_macros = {};
 806
 807     my $parse = sub {
 808         my ($k, $macro) = @_;
 809         my $lc_name = lc($k);
 810         $pve_fw_macro_ipversion->{$k} = 0;
 811         while (!ref($macro->[0])) {
 812             my $desc = shift @$macro;
 813             if ($desc eq 'ipv4only') {
 814                 $pve_fw_macro_ipversion->{$k} = 4;
 815             } elsif ($desc eq 'ipv6only') {
 816                 $pve_fw_macro_ipversion->{$k} = 6;
 817             } else {
 818                 $pve_fw_macro_descr->{$k} = $desc;
 819             }
 820         }
 821         $pve_fw_preferred_macro_names->{$lc_name} = $k;
 822         $pve_fw_parsed_macros->{$k} = $macro;
 823     };
 824
 825     foreach my $k (keys %$pve_fw_macros) {
 826         &$parse($k, $pve_fw_macros->{$k});
 827     }
 828
 829     foreach my $k (keys %$pve_ipv6fw_macros) {
 830         next if $pve_fw_parsed_macros->{$k};
 831         &$parse($k, $pve_ipv6fw_macros->{$k});
 832         $pve_fw_macro_ipversion->{$k} = 6;
 833     }
 834 }
 835
 836 init_firewall_macros();
 837
 838 sub get_macros {
 839     return wantarray ? ($pve_fw_parsed_macros, $pve_fw_macro_descr): $pve_fw_parsed_macros;
 840 }
 841
 842 my $etc_services;
 843
 844 sub get_etc_services {
 845
 846     return $etc_services if $etc_services;
 847
 848     my $filename = "/etc/services";
 849
 850     my $fh = IO::File->new($filename, O_RDONLY);
 851     if (!$fh) {
 852         warn "unable to read '$filename' - $!\n";
 853         return {};
 854     }
 855
 856     my $services = {};
 857
 858     while (my $line = <$fh>) {
 859         chomp ($line);
 860         next if $line =~m/^#/;
 861         next if ($line =~m/^\s*$/);
 862
 863         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
 864             $services->{byid}->{$2}->{name} = $1;
 865             $services->{byid}->{$2}->{port} = $2;
 866             $services->{byid}->{$2}->{$3} = 1;
 867             $services->{byname}->{$1} = $services->{byid}->{$2};
 868         }
 869     }
 870
 871     close($fh);
 872
 873     $etc_services = $services;
 874
 875
 876     return $etc_services;
 877 }
 878
 879 my $etc_protocols;
 880
 881 sub get_etc_protocols {
 882     return $etc_protocols if $etc_protocols;
 883
 884     my $filename = "/etc/protocols";
 885
 886     my $fh = IO::File->new($filename, O_RDONLY);
 887     if (!$fh) {
 888         warn "unable to read '$filename' - $!\n";
 889         return {};
 890     }
 891
 892     my $protocols = {};
 893
 894     while (my $line = <$fh>) {
 895         chomp ($line);
 896         next if $line =~m/^#/;
 897         next if ($line =~m/^\s*$/);
 898
 899         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
 900             $protocols->{byid}->{$2}->{name} = $1;
 901             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
 902         }
 903     }
 904
 905     close($fh);
 906
 907     # add special case for ICMP v6
 908     $protocols->{byid}->{icmpv6}->{name} = "icmpv6";
 909     $protocols->{byname}->{icmpv6} = $protocols->{byid}->{icmpv6};
 910
 911     $etc_protocols = $protocols;
 912
 913     return $etc_protocols;
 914 }
 915
 916 my $__local_network;
 917
 918 sub local_network {
 919     my ($new_value) = @_;
 920
 921     $__local_network = $new_value if defined($new_value);
 922
 923     return $__local_network if defined($__local_network);
 924
 925     eval {
 926         my $nodename = PVE::INotify::nodename();
 927
 928         my $ip = PVE::Cluster::remote_node_ip($nodename);
 929
 930         my $testip = Net::IP->new($ip);
 931
 932         my $isv6 = $testip->version == 6;
 933         my $routes = $isv6 ? PVE::ProcFSTools::read_proc_net_ipv6_route()
 934                            : PVE::ProcFSTools::read_proc_net_route();
 935         foreach my $entry (@$routes) {
 936             my $mask;
 937             if ($isv6) {
 938                 $mask = $entry->{prefix};
 939                 next if !$mask; # skip the default route...
 940             } else {
 941                 $mask = $PVE::Network::ipv4_mask_hash_localnet->{$entry->{mask}};
 942                 next if !defined($mask);
 943             }
 944             my $cidr = "$entry->{dest}/$mask";
 945             my $testnet = Net::IP->new($cidr);
 946             my $overlap = $testnet->overlaps($testip);
 947             if ($overlap == $Net::IP::IP_B_IN_A_OVERLAP ||
 948                 $overlap == $Net::IP::IP_IDENTICAL)
 949             {
 950                 $__local_network = $cidr;
 951                 return;
 952             }
 953         }
 954     };
 955     warn $@ if $@;
 956
 957     return $__local_network;
 958 }
 959
 960 # ipset names are limited to 31 characters,
 961 # and we use '-v4' or '-v6' to indicate IP versions,
 962 # and we use '_swap' suffix for atomic update,
 963 # for example PVEFW-${VMID}-${ipset_name}_swap
 964
 965 my $max_iptables_ipset_name_length = 31 - length("PVEFW-") - length("_swap");
 966
 967 sub compute_ipset_chain_name {
 968     my ($vmid, $ipset_name, $ipversion) = @_;
 969
 970     $vmid = 0 if !defined($vmid);
 971
 972     my $id = "$vmid-${ipset_name}-v$ipversion";
 973
 974     if (length($id) > $max_iptables_ipset_name_length) {
 975         $id = PVE::Tools::fnv31a_hex($id);
 976     }
 977
 978     return "PVEFW-$id";
 979 }
 980
 981 sub compute_ipfilter_ipset_name {
 982     my ($iface) = @_;
 983
 984     return "ipfilter-$iface";
 985 }
 986
 987 sub parse_address_list {
 988     my ($str) = @_;
 989
 990     if ($str =~ m/^(\+)(\S+)$/) { # ipset ref
 991         die "ipset name too long\n" if length($str) > ($max_ipset_name_length + 1);
 992         return;
 993     }
 994
 995     if ($str =~ m/^${ip_alias_pattern}$/) {
 996         die "alias name too long\n" if length($str) > $max_alias_name_length;
 997         return;
 998     }
 999
1000     my $count = 0;
1001     my $iprange = 0;
1002     my $ipversion;
1003
1004     my @elements = split(/,/, $str);
1005     die "extraneous commas in list\n" if $str ne join(',', @elements);
1006     foreach my $elem (@elements) {
1007         $count++;
1008         my $ip = Net::IP->new($elem);
1009         if (!$ip) {
1010             my $err = Net::IP::Error();
1011             die "invalid IP address: $err\n";
1012         }
1013         $iprange = 1 if $elem =~ m/-/;
1014
1015         my $new_ipversion = Net::IP::ip_is_ipv6($ip->ip()) ? 6 : 4;
1016
1017         die "detected mixed ipv4/ipv6 addresses in address list '$str'\n"
1018             if $ipversion && ($new_ipversion != $ipversion);
1019
1020         $ipversion = $new_ipversion;
1021     }
1022
1023     die "you can't use a range in a list\n" if $iprange && $count > 1;
1024
1025     return $ipversion;
1026 }
1027
1028 sub parse_port_name_number_or_range {
1029     my ($str, $dport) = @_;
1030
1031     my $services = PVE::Firewall::get_etc_services();
1032     my $count = 0;
1033     my $icmp_port = 0;
1034
1035     my @elements = split(/,/, $str);
1036     die "extraneous commas in list\n" if $str ne join(',', @elements);
1037     foreach my $item (@elements) {
1038         if ($item =~ m/^(\d+):(\d+)$/) {
1039             $count += 2;
1040             my ($port1, $port2) = ($1, $2);
1041             die "invalid port '$port1'\n" if $port1 > 65535;
1042             die "invalid port '$port2'\n" if $port2 > 65535;
1043         } elsif ($item =~ m/^(\d+)$/) {
1044             $count += 1;
1045             my $port = $1;
1046             die "invalid port '$port'\n" if $port > 65535;
1047         } else {
1048             if ($dport && $icmp_type_names->{$item}) {
1049                 $icmp_port = 1;
1050             } elsif ($dport && $icmpv6_type_names->{$item}) {
1051                 $icmp_port = 1;
1052             } else {
1053                 die "invalid port '$item'\n" if !$services->{byname}->{$item};
1054             }
1055         }
1056     }
1057
1058     die "ICPM ports not allowed in port range\n" if $icmp_port && $count > 0;
1059
1060     # I really don't like to use the word number here, but it's the only thing
1061     # that makes sense in a literal way. The range 1:100 counts as 2, not as
1062     # one and not as 100...
1063     die "too many entries in port list (> 15 numbers)\n"
1064         if $count > 15;
1065
1066     return (scalar(@elements) > 1);
1067 }
1068
1069 PVE::JSONSchema::register_format('pve-fw-sport-spec', \&pve_fw_verify_sport_spec);
1070 sub pve_fw_verify_sport_spec {
1071    my ($portstr) = @_;
1072
1073    parse_port_name_number_or_range($portstr, 0);
1074
1075    return $portstr;
1076 }
1077
1078 PVE::JSONSchema::register_format('pve-fw-dport-spec', \&pve_fw_verify_dport_spec);
1079 sub pve_fw_verify_dport_spec {
1080    my ($portstr) = @_;
1081
1082    parse_port_name_number_or_range($portstr, 1);
1083
1084    return $portstr;
1085 }
1086
1087 PVE::JSONSchema::register_format('pve-fw-addr-spec', \&pve_fw_verify_addr_spec);
1088 sub pve_fw_verify_addr_spec {
1089    my ($list) = @_;
1090
1091    parse_address_list($list);
1092
1093    return $list;
1094 }
1095
1096 PVE::JSONSchema::register_format('pve-fw-protocol-spec', \&pve_fw_verify_protocol_spec);
1097 sub pve_fw_verify_protocol_spec {
1098    my ($proto) = @_;
1099
1100    my $protocols = get_etc_protocols();
1101
1102    die "unknown protocol '$proto'\n" if $proto &&
1103        !(defined($protocols->{byname}->{$proto}) ||
1104          defined($protocols->{byid}->{$proto}));
1105
1106    return $proto;
1107 }
1108
1109
1110 # helper function for API
1111
1112 sub copy_opject_with_digest {
1113     my ($object) = @_;
1114
1115     my $sha = Digest::SHA->new('sha1');
1116
1117     my $res = {};
1118     foreach my $k (sort keys %$object) {
1119         my $v = $object->{$k};
1120         next if !defined($v);
1121         $res->{$k} = $v;
1122         $sha->add($k, ':', $v, "\n");
1123     }
1124
1125     my $digest = $sha->hexdigest;
1126
1127     $res->{digest} = $digest;
1128
1129     return wantarray ? ($res, $digest) : $res;
1130 }
1131
1132 sub copy_list_with_digest {
1133     my ($list) = @_;
1134
1135     my $sha = Digest::SHA->new('sha1');
1136
1137     my $res = [];
1138     foreach my $entry (@$list) {
1139         my $data = {};
1140         foreach my $k (sort keys %$entry) {
1141             my $v = $entry->{$k};
1142             next if !defined($v);
1143             $data->{$k} = $v;
1144             # Note: digest ignores refs ($rule->{errors})
1145             # since Digest::SHA expects a series of bytes,
1146             #  we have to encode the value here to prevent errors when
1147             #  using utf8 characters (eg. in comments)
1148             $sha->add($k, ':', encode_utf8($v), "\n") if !ref($v); ;
1149         }
1150         push @$res, $data;
1151     }
1152
1153     my $digest = $sha->hexdigest;
1154
1155     foreach my $entry (@$res) {
1156         $entry->{digest} = $digest;
1157     }
1158
1159     return wantarray ? ($res, $digest) : $res;
1160 }
1161
1162 our $cluster_option_properties = {
1163     enable => {
1164         description => "Enable or disable the firewall cluster wide.",
1165         type => 'integer',
1166         minimum => 0,
1167         optional => 1,
1168     },
1169     policy_in => {
1170         description => "Input policy.",
1171         type => 'string',
1172         optional => 1,
1173         enum => ['ACCEPT', 'REJECT', 'DROP'],
1174     },
1175     policy_out => {
1176         description => "Output policy.",
1177         type => 'string',
1178         optional => 1,
1179         enum => ['ACCEPT', 'REJECT', 'DROP'],
1180     },
1181 };
1182
1183 our $host_option_properties = {
1184     enable => {
1185         description => "Enable host firewall rules.",
1186         type => 'boolean',
1187         optional => 1,
1188     },
1189     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1190         description => "Log level for incoming traffic." }),
1191     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1192         description => "Log level for outgoing traffic." }),
1193     tcp_flags_log_level =>  get_standard_option('pve-fw-loglevel', {
1194         description => "Log level for illegal tcp flags filter." }),
1195     smurf_log_level =>  get_standard_option('pve-fw-loglevel', {
1196         description => "Log level for SMURFS filter." }),
1197     nosmurfs => {
1198         description => "Enable SMURFS filter.",
1199         type => 'boolean',
1200         optional => 1,
1201     },
1202     tcpflags => {
1203         description => "Filter illegal combinations of TCP flags.",
1204         type => 'boolean',
1205         optional => 1,
1206     },
1207     nf_conntrack_max => {
1208         description => "Maximum number of tracked connections.",
1209         type => 'integer',
1210         optional => 1,
1211         minimum => 32768,
1212     },
1213     nf_conntrack_tcp_timeout_established => {
1214         description => "Conntrack established timeout.",
1215         type => 'integer',
1216         optional => 1,
1217         minimum => 7875,
1218     },
1219     ndp => {
1220         description => "Enable NDP.",
1221         type => 'boolean',
1222         optional => 1,
1223     },
1224 };
1225
1226 our $vm_option_properties = {
1227     enable => {
1228         description => "Enable/disable firewall rules.",
1229         type => 'boolean',
1230         optional => 1,
1231     },
1232     macfilter => {
1233         description => "Enable/disable MAC address filter.",
1234         type => 'boolean',
1235         optional => 1,
1236     },
1237     dhcp => {
1238         description => "Enable DHCP.",
1239         type => 'boolean',
1240         optional => 1,
1241     },
1242     ndp => {
1243         description => "Enable NDP.",
1244         type => 'boolean',
1245         optional => 1,
1246     },
1247     radv => {
1248         description => "Allow sending Router Advertisement.",
1249         type => 'boolean',
1250         optional => 1,
1251     },
1252     ipfilter => {
1253         description => "Enable default IP filters. " .
1254            "This is equivalent to adding an empty ipfilter-net<id> ipset " .
1255            "for every interface. Such ipsets implicitly contain sane default " .
1256            "restrictions such as restricting IPv6 link local addresses to " .
1257            "the one derived from the interface's MAC address. For containers " .
1258            "the configured IP addresses will be implicitly added.",
1259         type => 'boolean',
1260         optional => 1,
1261     },
1262     policy_in => {
1263         description => "Input policy.",
1264         type => 'string',
1265         optional => 1,
1266         enum => ['ACCEPT', 'REJECT', 'DROP'],
1267     },
1268     policy_out => {
1269         description => "Output policy.",
1270         type => 'string',
1271         optional => 1,
1272         enum => ['ACCEPT', 'REJECT', 'DROP'],
1273     },
1274     log_level_in =>  get_standard_option('pve-fw-loglevel', {
1275         description => "Log level for incoming traffic." }),
1276     log_level_out =>  get_standard_option('pve-fw-loglevel', {
1277         description => "Log level for outgoing traffic." }),
1278
1279 };
1280
1281
1282 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.";
1283
1284 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.";
1285
1286 my $rule_properties = {
1287     pos => {
1288         description => "Update rule at position <pos>.",
1289         type => 'integer',
1290         minimum => 0,
1291         optional => 1,
1292     },
1293     digest => get_standard_option('pve-config-digest'),
1294     type => {
1295         description => "Rule type.",
1296         type => 'string',
1297         optional => 1,
1298         enum => ['in', 'out', 'group'],
1299     },
1300     action => {
1301         description => "Rule action ('ACCEPT', 'DROP', 'REJECT') or security group name.",
1302         type => 'string',
1303         optional => 1,
1304         pattern => $security_group_name_pattern,
1305         maxLength => 20,
1306         minLength => 2,
1307     },
1308     macro => {
1309         description => "Use predefined standard macro.",
1310         type => 'string',
1311         optional => 1,
1312         maxLength => 128,
1313     },
1314     iface => get_standard_option('pve-iface', {
1315         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.",
1316         optional => 1
1317     }),
1318     source => {
1319         description => "Restrict packet source address. $addr_list_descr",
1320         type => 'string', format => 'pve-fw-addr-spec',
1321         optional => 1,
1322     },
1323     dest => {
1324         description => "Restrict packet destination address. $addr_list_descr",
1325         type => 'string', format => 'pve-fw-addr-spec',
1326         optional => 1,
1327     },
1328     proto => {
1329         description => "IP protocol. You can use protocol names ('tcp'/'udp') or simple numbers, as defined in '/etc/protocols'.",
1330         type => 'string', format => 'pve-fw-protocol-spec',
1331         optional => 1,
1332     },
1333     enable => {
1334         description => "Flag to enable/disable a rule.",
1335         type => 'integer',
1336         minimum => 0,
1337         optional => 1,
1338     },
1339     sport => {
1340         description => "Restrict TCP/UDP source port. $port_descr",
1341         type => 'string', format => 'pve-fw-sport-spec',
1342         optional => 1,
1343     },
1344     dport => {
1345         description => "Restrict TCP/UDP destination port. $port_descr",
1346         type => 'string', format => 'pve-fw-dport-spec',
1347         optional => 1,
1348     },
1349     comment => {
1350         description => "Descriptive comment.",
1351         type => 'string',
1352         optional => 1,
1353     },
1354 };
1355
1356 sub add_rule_properties {
1357     my ($properties) = @_;
1358
1359     foreach my $k (keys %$rule_properties) {
1360         my $h = $rule_properties->{$k};
1361         # copy data, so that we can modify later without side effects
1362         foreach my $opt (keys %$h) { $properties->{$k}->{$opt} = $h->{$opt}; }
1363     }
1364
1365     return $properties;
1366 }
1367
1368 sub delete_rule_properties {
1369     my ($rule, $delete_str) = @_;
1370
1371     foreach my $opt (PVE::Tools::split_list($delete_str)) {
1372         raise_param_exc({ 'delete' => "no such property ('$opt')"})
1373             if !defined($rule_properties->{$opt});
1374         raise_param_exc({ 'delete' => "unable to delete required property '$opt'"})
1375             if $opt eq 'type' || $opt eq 'action';
1376         delete $rule->{$opt};
1377     }
1378
1379     return $rule;
1380 }
1381
1382 my $apply_macro = sub {
1383     my ($macro_name, $param, $verify, $ipversion) = @_;
1384
1385     my $macro_rules = $pve_fw_parsed_macros->{$macro_name};
1386     die "unknown macro '$macro_name'\n" if !$macro_rules; # should not happen
1387
1388     if ($ipversion && ($ipversion == 6) && $pve_ipv6fw_macros->{$macro_name}) {
1389         $macro_rules = $pve_ipv6fw_macros->{$macro_name};
1390     }
1391
1392     # skip macros which are specific to another ipversion
1393     if ($ipversion && (my $required = $pve_fw_macro_ipversion->{$macro_name})) {
1394         return if $ipversion != $required;
1395     }
1396
1397     my $rules = [];
1398
1399     foreach my $templ (@$macro_rules) {
1400         my $rule = {};
1401         my $param_used = {};
1402         foreach my $k (keys %$templ) {
1403             my $v = $templ->{$k};
1404             if ($v eq 'PARAM') {
1405                 $v = $param->{$k};
1406                 $param_used->{$k} = 1;
1407             } elsif ($v eq 'DEST') {
1408                 $v = $param->{dest};
1409                 $param_used->{dest} = 1;
1410             } elsif ($v eq 'SOURCE') {
1411                 $v = $param->{source};
1412                 $param_used->{source} = 1;
1413             }
1414
1415             if (!defined($v)) {
1416                 my $msg = "missing parameter '$k' in macro '$macro_name'";
1417                 raise_param_exc({ macro => $msg }) if $verify;
1418                 die "$msg\n";
1419             }
1420             $rule->{$k} = $v;
1421         }
1422         foreach my $k (keys %$param) {
1423             next if $k eq 'macro';
1424             next if !defined($param->{$k});
1425             next if $param_used->{$k};
1426             if (defined($rule->{$k})) {
1427                 if ($rule->{$k} ne $param->{$k}) {
1428                     my $msg = "parameter '$k' already define in macro (value = '$rule->{$k}')";
1429                     raise_param_exc({ $k => $msg }) if $verify;
1430                     die "$msg\n";
1431                 }
1432             } else {
1433                 $rule->{$k} = $param->{$k};
1434             }
1435         }
1436         push @$rules, $rule;
1437     }
1438
1439     return $rules;
1440 };
1441
1442 my $rule_env_iface_lookup = {
1443     'ct' => 1,
1444     'vm' => 1,
1445     'group' => 0,
1446     'cluster' => 1,
1447     'host' => 1,
1448 };
1449
1450 sub verify_rule {
1451     my ($rule, $cluster_conf, $fw_conf, $rule_env, $noerr) = @_;
1452
1453     my $allow_groups = $rule_env eq 'group' ? 0 : 1;
1454
1455     my $allow_iface = $rule_env_iface_lookup->{$rule_env};
1456     die "unknown rule_env '$rule_env'\n" if !defined($allow_iface); # should not happen
1457
1458     my $errors = $rule->{errors} || {};
1459
1460     my $error_count = 0;
1461
1462     my $add_error = sub {
1463         my ($param, $msg)  = @_;
1464         chomp $msg;
1465         raise_param_exc({ $param => $msg }) if !$noerr;
1466         $error_count++;
1467         $errors->{$param} = $msg if !$errors->{$param};
1468     };
1469
1470     my $ipversion;
1471     my $set_ip_version = sub {
1472         my $vers = shift;
1473         if ($vers) {
1474             die "detected mixed ipv4/ipv6 adresses in rule\n"
1475                 if $ipversion && ($vers != $ipversion);
1476             $ipversion = $vers;
1477         }
1478     };
1479
1480     my $check_ipset_or_alias_property = sub {
1481         my ($name, $expected_ipversion) = @_;
1482
1483         if (my $value = $rule->{$name}) {
1484             if ($value =~ m/^\+/) {
1485                 if ($value =~ m/^\+(${ipset_name_pattern})$/) {
1486                     &$add_error($name, "no such ipset '$1'")
1487                         if !($cluster_conf->{ipset}->{$1} || ($fw_conf && $fw_conf->{ipset}->{$1}));
1488
1489                 } else {
1490                     &$add_error($name, "invalid ipset name '$value'");
1491                 }
1492             } elsif ($value =~ m/^${ip_alias_pattern}$/){
1493                 my $alias = lc($value);
1494                 &$add_error($name, "no such alias '$value'")
1495                     if !($cluster_conf->{aliases}->{$alias} || ($fw_conf && $fw_conf->{aliases}->{$alias}));
1496                 my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1497                 $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1498
1499                 &$set_ip_version($e->{ipversion});
1500             }
1501         }
1502     };
1503
1504     my $type = $rule->{type};
1505     my $action = $rule->{action};
1506
1507     &$add_error('type', "missing property") if !$type;
1508     &$add_error('action', "missing property") if !$action;
1509
1510     if ($type) {
1511         if ($type eq  'in' || $type eq 'out') {
1512             &$add_error('action', "unknown action '$action'")
1513                 if $action && ($action !~ m/^(ACCEPT|DROP|REJECT)$/);
1514         } elsif ($type eq 'group') {
1515             &$add_error('type', "security groups not allowed")
1516                 if !$allow_groups;
1517             &$add_error('action', "invalid characters in security group name")
1518                 if $action && ($action !~ m/^${security_group_name_pattern}$/);
1519         } else {
1520             &$add_error('type', "unknown rule type '$type'");
1521         }
1522     }
1523
1524     if ($rule->{iface}) {
1525         &$add_error('type', "parameter -i not allowed for this rule type")
1526             if !$allow_iface;
1527         eval { PVE::JSONSchema::pve_verify_iface($rule->{iface}); };
1528         &$add_error('iface', $@) if $@;
1529         if ($rule_env eq 'vm' || $rule_env eq 'ct') {
1530             &$add_error('iface', "value does not match the regex pattern 'net\\d+'")
1531                 if $rule->{iface} !~  m/^net(\d+)$/;
1532         }
1533     }
1534
1535     if ($rule->{macro}) {
1536         if (my $preferred_name = $pve_fw_preferred_macro_names->{lc($rule->{macro})}) {
1537             $rule->{macro} = $preferred_name;
1538         } else {
1539             &$add_error('macro', "unknown macro '$rule->{macro}'");
1540         }
1541     }
1542
1543     if ($rule->{proto}) {
1544         eval { pve_fw_verify_protocol_spec($rule->{proto}); };
1545         &$add_error('proto', $@) if $@;
1546         &$set_ip_version(4) if $rule->{proto} eq 'icmp';
1547         &$set_ip_version(6) if $rule->{proto} eq 'icmpv6';
1548     }
1549
1550     if ($rule->{dport}) {
1551         eval { parse_port_name_number_or_range($rule->{dport}, 1); };
1552         &$add_error('dport', $@) if $@;
1553         my $proto = $rule->{proto};
1554         &$add_error('proto', "missing property - 'dport' requires this property")
1555             if !$proto;
1556         &$add_error('dport', "protocol '$proto' does not support ports")
1557             if !$PROTOCOLS_WITH_PORTS->{$proto} &&
1558                 $proto ne 'icmp' && $proto ne 'icmpv6'; # special cases
1559     }
1560
1561     if ($rule->{sport}) {
1562         eval { parse_port_name_number_or_range($rule->{sport}, 0); };
1563         &$add_error('sport', $@) if $@;
1564         my $proto = $rule->{proto};
1565         &$add_error('proto', "missing property - 'sport' requires this property")
1566             if !$proto;
1567         &$add_error('sport', "protocol '$proto' does not support ports")
1568             if !$PROTOCOLS_WITH_PORTS->{$proto};
1569     }
1570
1571     if ($rule->{source}) {
1572         eval {
1573             my $source_ipversion = parse_address_list($rule->{source});
1574             &$set_ip_version($source_ipversion);
1575         };
1576         &$add_error('source', $@) if $@;
1577         &$check_ipset_or_alias_property('source', $ipversion);
1578     }
1579
1580     if ($rule->{dest}) {
1581         eval {
1582             my $dest_ipversion = parse_address_list($rule->{dest});
1583             &$set_ip_version($dest_ipversion);
1584         };
1585         &$add_error('dest', $@) if $@;
1586         &$check_ipset_or_alias_property('dest', $ipversion);
1587     }
1588
1589     $rule->{ipversion} = $ipversion if $ipversion;
1590
1591     if ($rule->{macro} && !$error_count) {
1592         eval { &$apply_macro($rule->{macro}, $rule, 1, $ipversion); };
1593         if (my $err = $@) {
1594             if (ref($err) eq "PVE::Exception" && $err->{errors}) {
1595                 my $eh = $err->{errors};
1596                 foreach my $p (keys %$eh) {
1597                     &$add_error($p, $eh->{$p});
1598                 }
1599             } else {
1600                 &$add_error('macro', "$err");
1601             }
1602         }
1603     }
1604
1605     $rule->{errors} = $errors if $error_count;
1606
1607     return $rule;
1608 }
1609
1610 sub copy_rule_data {
1611     my ($rule, $param) = @_;
1612
1613     foreach my $k (keys %$rule_properties) {
1614         if (defined(my $v = $param->{$k})) {
1615             if ($v eq '' || $v eq '-') {
1616                 delete $rule->{$k};
1617             } else {
1618                 $rule->{$k} = $v;
1619             }
1620         }
1621     }
1622
1623     return $rule;
1624 }
1625
1626 sub rules_modify_permissions {
1627     my ($rule_env) = @_;
1628
1629     if ($rule_env eq 'host') {
1630         return {
1631             check => ['perm', '/nodes/{node}', [ 'Sys.Modify' ]],
1632         };
1633     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1634         return {
1635             check => ['perm', '/', [ 'Sys.Modify' ]],
1636         };
1637     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1638         return {
1639             check => ['perm', '/vms/{vmid}', [ 'VM.Config.Network' ]],
1640         }
1641     }
1642
1643     return undef;
1644 }
1645
1646 sub rules_audit_permissions {
1647     my ($rule_env) = @_;
1648
1649     if ($rule_env eq 'host') {
1650         return {
1651             check => ['perm', '/nodes/{node}', [ 'Sys.Audit' ]],
1652         };
1653     } elsif ($rule_env eq 'cluster' || $rule_env eq 'group') {
1654         return {
1655             check => ['perm', '/', [ 'Sys.Audit' ]],
1656         };
1657     } elsif ($rule_env eq 'vm' || $rule_env eq 'ct') {
1658         return {
1659             check => ['perm', '/vms/{vmid}', [ 'VM.Audit' ]],
1660         }
1661     }
1662
1663     return undef;
1664 }
1665
1666 # core functions
1667 my $bridge_firewall_enabled = 0;
1668
1669 sub enable_bridge_firewall {
1670
1671     return if $bridge_firewall_enabled; # only once
1672
1673     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-iptables", "1");
1674     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/bridge/bridge-nf-call-ip6tables", "1");
1675
1676     # make sure syncookies are enabled (which is default on newer 3.X kernels anyways)
1677     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/ipv4/tcp_syncookies", "1");
1678
1679     $bridge_firewall_enabled = 1;
1680 }
1681
1682 sub iptables_restore_cmdlist {
1683     my ($cmdlist) = @_;
1684
1685     run_command("/sbin/iptables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1686 }
1687
1688 sub ip6tables_restore_cmdlist {
1689     my ($cmdlist) = @_;
1690
1691     run_command("/sbin/ip6tables-restore -n", input => $cmdlist, errmsg => "iptables_restore_cmdlist");
1692 }
1693
1694 sub ipset_restore_cmdlist {
1695     my ($cmdlist) = @_;
1696
1697     run_command("/sbin/ipset restore", input => $cmdlist, errmsg => "ipset_restore_cmdlist");
1698 }
1699
1700 sub iptables_get_chains {
1701     my ($iptablescmd) = @_;
1702
1703     $iptablescmd = "iptables" if !$iptablescmd;
1704
1705     my $res = {};
1706
1707     # check what chains we want to track
1708     my $is_pvefw_chain = sub {
1709         my $name = shift;
1710
1711         return 1 if $name =~ m/^PVEFW-\S+$/;
1712
1713         return 1 if $name =~ m/^tap\d+i\d+-(?:IN|OUT)$/;
1714
1715         return 1 if $name =~ m/^veth\d+i\d+-(?:IN|OUT)$/;
1716
1717         return 1 if $name =~ m/^fwbr\d+(v\d+)?-(?:FW|IN|OUT|IPS)$/;
1718         return 1 if $name =~ m/^GROUP-(?:$security_group_name_pattern)-(?:IN|OUT)$/;
1719
1720         return undef;
1721     };
1722
1723     my $table = '';
1724
1725     my $hooks = {};
1726
1727     my $parser = sub {
1728         my $line = shift;
1729
1730         return if $line =~ m/^#/;
1731         return if $line =~ m/^\s*$/;
1732
1733         if ($line =~ m/^\*(\S+)$/) {
1734             $table = $1;
1735             return;
1736         }
1737
1738         return if $table ne 'filter';
1739
1740         if ($line =~ m/^:(\S+)\s/) {
1741             my $chain = $1;
1742             return if !&$is_pvefw_chain($chain);
1743             $res->{$chain} = "unknown";
1744         } elsif ($line =~ m/^-A\s+(\S+)\s.*--comment\s+\"PVESIG:(\S+)\"/) {
1745             my ($chain, $sig) = ($1, $2);
1746             return if !&$is_pvefw_chain($chain);
1747             $res->{$chain} = $sig;
1748         } elsif ($line =~ m/^-A\s+(INPUT|OUTPUT|FORWARD)\s+-j\s+PVEFW-\1$/) {
1749             $hooks->{$1} = 1;
1750         } else {
1751             # simply ignore the rest
1752             return;
1753         }
1754     };
1755
1756     run_command("/sbin/$iptablescmd-save", outfunc => $parser);
1757
1758     return wantarray ? ($res, $hooks) : $res;
1759 }
1760
1761 sub iptables_chain_digest {
1762     my ($rules) = @_;
1763     my $digest = Digest::SHA->new('sha1');
1764     foreach my $rule (@$rules) { # order is important
1765         $digest->add($rule);
1766     }
1767     return $digest->b64digest;
1768 }
1769
1770 sub ipset_chain_digest {
1771     my ($rules) = @_;
1772
1773     my $digest = Digest::SHA->new('sha1');
1774     foreach my $rule (sort @$rules) { # note: sorted
1775         $digest->add($rule);
1776     }
1777     return $digest->b64digest;
1778 }
1779
1780 sub ipset_get_chains {
1781
1782     my $res = {};
1783     my $chains = {};
1784
1785     my $parser = sub {
1786         my $line = shift;
1787
1788         return if $line =~ m/^#/;
1789         return if $line =~ m/^\s*$/;
1790         if ($line =~ m/^(?:\S+)\s(PVEFW-\S+)\s(?:\S+).*/) {
1791             my $chain = $1;
1792             $line =~ s/\s+$//; # delete trailing white space
1793             push @{$chains->{$chain}}, $line;
1794         } else {
1795             # simply ignore the rest
1796             return;
1797         }
1798     };
1799
1800     run_command("/sbin/ipset save", outfunc => $parser);
1801
1802     # compute digest for each chain
1803     foreach my $chain (keys %$chains) {
1804         $res->{$chain} = ipset_chain_digest($chains->{$chain});
1805     }
1806
1807     return $res;
1808 }
1809
1810 # substitude action of rule according to action hash
1811 sub rule_substitude_action {
1812     my ($rule, $actions) = @_;
1813
1814     if (my $action = $rule->{action}) {
1815         $rule->{action} = $actions->{$action} if defined($actions->{$action});
1816     }
1817 }
1818
1819 # generate a src or dst match
1820 # $dir(ection) is either d or s
1821 sub ipt_gen_src_or_dst_match {
1822     my ($adr, $dir, $ipversion, $cluster_conf, $fw_conf) = @_;
1823
1824     my $srcdst;
1825     if ($dir eq 's') {
1826         $srcdst = "src";
1827     } elsif ($dir eq 'd') {
1828         $srcdst = "dst";
1829     } else {
1830         die "ipt_gen_src_or_dst_match: invalid direction $dir \n";
1831     }
1832
1833     my $match;
1834     if ($adr =~ m/^\+/) {
1835         if ($adr =~ m/^\+(${ipset_name_pattern})$/) {
1836             my $name = $1;
1837             my $ipset_chain;
1838             if ($fw_conf && $fw_conf->{ipset}->{$name}) {
1839                 $ipset_chain = compute_ipset_chain_name($fw_conf->{vmid}, $name, $ipversion);
1840             } elsif ($cluster_conf && $cluster_conf->{ipset}->{$name}) {
1841                 $ipset_chain = compute_ipset_chain_name(0, $name, $ipversion);
1842             } else {
1843                 die "no such ipset '$name'\n";
1844             }
1845             $match = "-m set --match-set ${ipset_chain} ${srcdst}";
1846         } else {
1847             die "invalid security group name '$adr'\n";
1848         }
1849     } elsif ($adr =~ m/^${ip_alias_pattern}$/){
1850         my $alias = lc($adr);
1851         my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
1852         $e = $cluster_conf->{aliases}->{$alias} if !$e && $cluster_conf;
1853         die "no such alias '$adr'\n" if !$e;
1854         $match = "-${dir} $e->{cidr}";
1855     } elsif ($adr =~ m/\-/){
1856         $match = "-m iprange --${srcdst}-range $adr";
1857     } else {
1858         $match = "-${dir} $adr";
1859     }
1860
1861     return $match;
1862 }
1863
1864 # convert a %rule to an array of iptables commands
1865 sub ipt_rule_to_cmds {
1866     my ($rule, $chain, $ipversion, $cluster_conf, $fw_conf, $vmid) = @_;
1867
1868     die "ipt_rule_to_cmds unable to handle macro" if $rule->{macro}; #should not happen
1869
1870     my @match = ();
1871
1872     if (defined $rule->{match}) {
1873         push @match, $rule->{match};
1874     } else {
1875         push @match, "-i $rule->{iface_in}" if $rule->{iface_in};
1876         push @match, "-o $rule->{iface_out}" if $rule->{iface_out};
1877
1878         if ($rule->{source}) {
1879             push @match, ipt_gen_src_or_dst_match($rule->{source}, 's', $ipversion, $cluster_conf, $fw_conf);
1880         }
1881         if ($rule->{dest}) {
1882             push @match, ipt_gen_src_or_dst_match($rule->{dest}, 'd', $ipversion, $cluster_conf, $fw_conf);
1883         }
1884
1885         if (my $proto = $rule->{proto}) {
1886             push @match, "-p $proto";
1887
1888             my $multidport = defined($rule->{dport}) && parse_port_name_number_or_range($rule->{dport}, 1);
1889             my $multisport = defined($rule->{sport}) && parse_port_name_number_or_range($rule->{sport}, 0);
1890
1891             my $add_dport = sub {
1892                 return if !$rule->{dport};
1893
1894                 if ($proto eq 'icmp') {
1895                     # Note: we use dport to store --icmp-type
1896                     die "unknown icmp-type '$rule->{dport}'\n"
1897                         if $rule->{dport} !~ /^\d+$/ && !defined($icmp_type_names->{$rule->{dport}});
1898                     push @match, "-m icmp --icmp-type $rule->{dport}";
1899                 } elsif ($proto eq 'icmpv6') {
1900                     # Note: we use dport to store --icmpv6-type
1901                     die "unknown icmpv6-type '$rule->{dport}'\n"
1902                         if $rule->{dport} !~ /^\d+$/ && !defined($icmpv6_type_names->{$rule->{dport}});
1903                     push @match, "-m icmpv6 --icmpv6-type $rule->{dport}";
1904                 } elsif (!$PROTOCOLS_WITH_PORTS->{$proto}) {
1905                     die "protocol $proto does not have ports\n";
1906                 } elsif ($multidport) {
1907                     push @match, "--match multiport", "--dports $rule->{dport}";
1908                 } else {
1909                     push @match, "--dport $rule->{dport}";
1910                 }
1911             };
1912
1913             my $add_sport = sub {
1914                 return if !$rule->{sport};
1915
1916                 die "protocol $proto does not have ports\n"
1917                     if !$PROTOCOLS_WITH_PORTS->{$proto};
1918                 if ($multisport) {
1919                     push @match, "--match multiport", "--sports $rule->{sport}";
1920                 } else {
1921                     push @match, "--sport $rule->{sport}";
1922                 }
1923             };
1924
1925             # order matters - single port before multiport!
1926             $add_dport->() if $multisport;
1927             $add_sport->();
1928             $add_dport->() if !$multisport;
1929         } elsif ($rule->{dport} || $rule->{sport}) {
1930             die "destination port '$rule->{dport}', but no protocol specified\n" if $rule->{dport};
1931             die "source port '$rule->{sport}', but no protocol specified\n" if $rule->{sport};
1932         }
1933
1934         push @match, "-m addrtype --dst-type $rule->{dsttype}" if $rule->{dsttype};
1935     }
1936     my $matchstr = scalar(@match) ? join(' ', @match) : "";
1937
1938     my $targetstr;
1939     if (defined $rule->{target}) {
1940         $targetstr = $rule->{target};
1941     } else {
1942         my $action = (defined $rule->{action}) ? $rule->{action} : "";
1943         my $goto = 1 if $action eq 'PVEFW-SET-ACCEPT-MARK';
1944         $targetstr = ($goto) ? "-g $action" : "-j $action";
1945     }
1946
1947     my @iptcmds;
1948     if (defined $rule->{log} && $rule->{log}) {
1949         my $logaction = get_log_rule_base($chain, $vmid, $rule->{logmsg}, $rule->{log});
1950         push @iptcmds, "-A $chain $matchstr $logaction";
1951     }
1952     push @iptcmds, "-A $chain $matchstr $targetstr";
1953     return @iptcmds;
1954 }
1955
1956 sub ruleset_generate_rule {
1957     my ($ruleset, $chain, $ipversion, $rule, $cluster_conf, $fw_conf) = @_;
1958
1959     my $rules;
1960
1961     if ($rule->{macro}) {
1962         $rules = &$apply_macro($rule->{macro}, $rule, 0, $ipversion);
1963     } else {
1964         $rules = [ $rule ];
1965     }
1966
1967     # update all or nothing
1968     my @ipt_rule_cmds;
1969     foreach my $r (@$rules) {
1970         push @ipt_rule_cmds, ipt_rule_to_cmds($r, $chain, $ipversion, $cluster_conf, $fw_conf);
1971     }
1972     foreach my $c (@ipt_rule_cmds) {
1973         ruleset_add_ipt_cmd($ruleset, $chain, $c);
1974     }
1975 }
1976
1977 sub ruleset_create_chain {
1978     my ($ruleset, $chain) = @_;
1979
1980     die "Invalid chain name '$chain' (28 char max)\n" if length($chain) > 28;
1981     die "chain name may not contain collons\n" if $chain =~ m/:/; # because of log format
1982
1983     die "chain '$chain' already exists\n" if $ruleset->{$chain};
1984
1985     $ruleset->{$chain} = [];
1986 }
1987
1988 sub ruleset_chain_exist {
1989     my ($ruleset, $chain) = @_;
1990
1991     return $ruleset->{$chain} ? 1 : undef;
1992 }
1993
1994 # add an iptables command (like generated by ipt_rule_to_cmds) to a chain
1995 sub ruleset_add_ipt_cmd {
1996    my ($ruleset, $chain, $iptcmd) = @_;
1997
1998    die "no such chain '$chain'\n" if !$ruleset->{$chain};
1999
2000    push @{$ruleset->{$chain}}, $iptcmd;
2001 }
2002
2003 sub ruleset_addrule {
2004    my ($ruleset, $chain, $match, $action, $log, $logmsg, $vmid) = @_;
2005
2006    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2007
2008    if (defined($log) && $log) {
2009         my $logaction = get_log_rule_base($chain, $vmid, $logmsg, $log);
2010         push @{$ruleset->{$chain}}, "-A $chain $match $logaction";
2011    }
2012    push @{$ruleset->{$chain}}, "-A $chain $match $action";
2013 }
2014
2015 sub ruleset_insertrule {
2016    my ($ruleset, $chain, $match, $action, $log) = @_;
2017
2018    die "no such chain '$chain'\n" if !$ruleset->{$chain};
2019
2020    unshift @{$ruleset->{$chain}}, "-A $chain $match $action";
2021 }
2022
2023 sub get_log_rule_base {
2024     my ($chain, $vmid, $msg, $loglevel) = @_;
2025
2026     $vmid = 0 if !defined($vmid);
2027     $msg = "" if !defined($msg);
2028
2029     # Note: we use special format for prefix to pass further
2030     # info to log daemon (VMID, LOGLEVEL and CHAIN)
2031
2032     return "-j NFLOG --nflog-prefix \":$vmid:$loglevel:$chain: $msg\"";
2033 }
2034
2035 sub ruleset_add_chain_policy {
2036     my ($ruleset, $chain, $ipversion, $vmid, $policy, $loglevel, $accept_action) = @_;
2037
2038     if ($policy eq 'ACCEPT') {
2039
2040         my $rule = { action => 'ACCEPT' };
2041         rule_substitude_action($rule, { ACCEPT =>  $accept_action});
2042         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
2043
2044     } elsif ($policy eq 'DROP') {
2045
2046         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Drop");
2047
2048         ruleset_addrule($ruleset, $chain, "", "-j DROP", $loglevel, "policy $policy: ", $vmid);
2049     } elsif ($policy eq 'REJECT') {
2050         ruleset_addrule($ruleset, $chain, "", "-j PVEFW-Reject");
2051
2052         ruleset_addrule($ruleset, $chain, "", "-g PVEFW-reject", $loglevel, "policy $policy:", $vmid);
2053     } else {
2054         # should not happen
2055         die "internal error: unknown policy '$policy'";
2056     }
2057 }
2058
2059 sub ruleset_chain_add_ndp {
2060     my ($ruleset, $chain, $ipversion, $options, $direction, $accept) = @_;
2061     return if $ipversion != 6 || (defined($options->{ndp}) && !$options->{ndp});
2062
2063     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-solicitation", $accept);
2064     if ($direction ne 'OUT' || $options->{radv}) {
2065         ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", $accept);
2066     }
2067     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-solicitation", $accept);
2068     ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type neighbor-advertisement", $accept);
2069 }
2070
2071 sub ruleset_chain_add_conn_filters {
2072     my ($ruleset, $chain, $accept) = @_;
2073
2074     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID", "-j DROP");
2075     ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate RELATED,ESTABLISHED", "-j $accept");
2076 }
2077
2078 sub ruleset_chain_add_input_filters {
2079     my ($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel) = @_;
2080
2081     if ($cluster_conf->{ipset}->{blacklist}){
2082         if (!ruleset_chain_exist($ruleset, "PVEFW-blacklist")) {
2083             ruleset_create_chain($ruleset, "PVEFW-blacklist");
2084             ruleset_addrule($ruleset, "PVEFW-blacklist", "", "-j DROP", $loglevel, "DROP: ");
2085         }
2086         my $ipset_chain = compute_ipset_chain_name(0, 'blacklist', $ipversion);
2087         ruleset_addrule($ruleset, $chain, "-m set --match-set ${ipset_chain} src", "-j PVEFW-blacklist");
2088     }
2089
2090     if (!(defined($options->{nosmurfs}) && $options->{nosmurfs} == 0)) {
2091         if ($ipversion == 4) {
2092             ruleset_addrule($ruleset, $chain, "-m conntrack --ctstate INVALID,NEW", "-j PVEFW-smurfs");
2093         }
2094     }
2095
2096     if ($options->{tcpflags}) {
2097         ruleset_addrule($ruleset, $chain, "-p tcp", "-j PVEFW-tcpflags");
2098     }
2099 }
2100
2101 sub ruleset_create_vm_chain {
2102     my ($ruleset, $chain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction) = @_;
2103
2104     ruleset_create_chain($ruleset, $chain);
2105     my $accept = generate_nfqueue($options);
2106
2107     if (!(defined($options->{dhcp}) && $options->{dhcp} == 0)) {
2108         if ($ipversion == 4) {
2109             if ($direction eq 'OUT') {
2110                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2111                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2112                                         proto => 'udp', sport => 68, dport => 67 });
2113             } else {
2114                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2115                                       { action => 'ACCEPT',
2116                                         proto => 'udp', sport => 67, dport => 68 });
2117             }
2118         } elsif ($ipversion == 6) {
2119             if ($direction eq 'OUT') {
2120                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2121                                       { action => 'PVEFW-SET-ACCEPT-MARK',
2122                                         proto => 'udp', sport => 546, dport => 547 });
2123             } else {
2124                 ruleset_generate_rule($ruleset, $chain, $ipversion,
2125                                       { action => 'ACCEPT',
2126                                         proto => 'udp', sport => 547, dport => 546 });
2127             }
2128         }
2129
2130     }
2131
2132     if ($direction eq 'OUT') {
2133         if (defined($macaddr) && !(defined($options->{macfilter}) && $options->{macfilter} == 0)) {
2134             ruleset_addrule($ruleset, $chain, "-m mac ! --mac-source $macaddr", "-j DROP");
2135         }
2136         if ($ipversion == 6 && !$options->{radv}) {
2137             ruleset_addrule($ruleset, $chain, "-p icmpv6 --icmpv6-type router-advertisement", "-j DROP");
2138         }
2139         if ($ipfilter_ipset) {
2140             ruleset_addrule($ruleset, $chain, "-m set ! --match-set $ipfilter_ipset src", "-j DROP");
2141         }
2142         ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2143     }
2144
2145     my $accept_action = $direction eq 'OUT' ? '-g PVEFW-SET-ACCEPT-MARK' : "-j $accept";
2146     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, $direction, $accept_action);
2147 }
2148
2149 sub ruleset_add_group_rule {
2150     my ($ruleset, $cluster_conf, $chain, $rule, $direction, $action, $ipversion) = @_;
2151
2152     my $group = $rule->{action};
2153     my $group_chain = "GROUP-$group-$direction";
2154     if(!ruleset_chain_exist($ruleset, $group_chain)){
2155         generate_group_rules($ruleset, $cluster_conf, $group, $ipversion);
2156     }
2157
2158     if ($direction eq 'OUT' && $rule->{iface_out}) {
2159         ruleset_addrule($ruleset, $chain, "-o $rule->{iface_out}", "-j $group_chain");
2160     } elsif ($direction eq 'IN' && $rule->{iface_in}) {
2161         ruleset_addrule($ruleset, $chain, "-i $rule->{iface_in}", "-j $group_chain");
2162     } else {
2163         ruleset_addrule($ruleset, $chain, "", "-j $group_chain");
2164     }
2165
2166     ruleset_addrule($ruleset, $chain, "-m mark --mark $FWACCEPTMARK_ON", "-j $action");
2167 }
2168
2169 sub ruleset_generate_vm_rules {
2170     my ($ruleset, $rules, $cluster_conf, $vmfw_conf, $chain, $netid, $direction, $options, $ipversion) = @_;
2171
2172     my $lc_direction = lc($direction);
2173
2174     my $in_accept = generate_nfqueue($options);
2175
2176     foreach my $rule (@$rules) {
2177         next if $rule->{iface} && $rule->{iface} ne $netid;
2178         next if !$rule->{enable} || $rule->{errors};
2179         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2180
2181         if ($rule->{type} eq 'group') {
2182             ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, $direction,
2183                                    $direction eq 'OUT' ? 'RETURN' : $in_accept, $ipversion);
2184         } else {
2185             next if $rule->{type} ne $lc_direction;
2186             eval {
2187                 if ($direction eq 'OUT') {
2188                     rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2189                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2190                 } else {
2191                     rule_substitude_action($rule, { ACCEPT => $in_accept , REJECT => "PVEFW-reject" });
2192                     ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $vmfw_conf);
2193                 }
2194             };
2195             warn $@ if $@;
2196         }
2197     }
2198 }
2199
2200 sub generate_nfqueue {
2201     my ($options) = @_;
2202
2203     if ($options->{ips}) {
2204         my $action = "NFQUEUE";
2205         if ($options->{ips_queues} && $options->{ips_queues} =~ m/^(\d+)(:(\d+))?$/) {
2206             if (defined($3) && defined($1)) {
2207                 $action .= " --queue-balance $1:$3";
2208             } elsif (defined($1)) {
2209                 $action .= " --queue-num $1";
2210             }
2211         }
2212         $action .= " --queue-bypass" if $feature_ipset_nomatch; #need kernel 3.10
2213         return $action;
2214     } else {
2215         return "ACCEPT";
2216     }
2217 }
2218
2219 sub ruleset_generate_vm_ipsrules {
2220     my ($ruleset, $options, $direction, $iface) = @_;
2221
2222     if ($options->{ips} && $direction eq 'IN') {
2223         my $nfqueue = generate_nfqueue($options);
2224
2225         if (!ruleset_chain_exist($ruleset, "PVEFW-IPS")) {
2226             ruleset_create_chain($ruleset, "PVEFW-IPS");
2227         }
2228
2229         ruleset_addrule($ruleset, "PVEFW-IPS", "-m physdev --physdev-out $iface --physdev-is-bridged", "-j $nfqueue");
2230     }
2231 }
2232
2233 sub generate_tap_rules_direction {
2234     my ($ruleset, $cluster_conf, $iface, $netid, $macaddr, $vmfw_conf, $vmid, $direction, $ipversion) = @_;
2235
2236     my $lc_direction = lc($direction);
2237
2238     my $rules = $vmfw_conf->{rules};
2239
2240     my $options = $vmfw_conf->{options};
2241     my $loglevel = get_option_log_level($options, "log_level_${lc_direction}");
2242
2243     my $tapchain = "$iface-$direction";
2244
2245     my $ipfilter_name = compute_ipfilter_ipset_name($netid);
2246     my $ipfilter_ipset = compute_ipset_chain_name($vmid, $ipfilter_name, $ipversion)
2247         if $options->{ipfilter} || $vmfw_conf->{ipset}->{$ipfilter_name};
2248
2249     # create chain with mac and ip filter
2250     ruleset_create_vm_chain($ruleset, $tapchain, $ipversion, $options, $macaddr, $ipfilter_ipset, $direction);
2251
2252     if ($options->{enable}) {
2253         ruleset_generate_vm_rules($ruleset, $rules, $cluster_conf, $vmfw_conf, $tapchain, $netid, $direction, $options, $ipversion);
2254
2255         ruleset_generate_vm_ipsrules($ruleset, $options, $direction, $iface);
2256
2257         # implement policy
2258         my $policy;
2259
2260         if ($direction eq 'OUT') {
2261             $policy = $options->{policy_out} || 'ACCEPT'; # allow everything by default
2262         } else {
2263         $policy = $options->{policy_in} || 'DROP'; # allow nothing by default
2264         }
2265
2266         my $accept = generate_nfqueue($options);
2267         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : $accept;
2268         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, $policy, $loglevel, $accept_action);
2269     } else {
2270         my $accept_action = $direction eq 'OUT' ? "PVEFW-SET-ACCEPT-MARK" : 'ACCEPT';
2271         ruleset_add_chain_policy($ruleset, $tapchain, $ipversion, $vmid, 'ACCEPT', $loglevel, $accept_action);
2272     }
2273
2274     # plug the tap chain to bridge chain
2275     if ($direction eq 'IN') {
2276         ruleset_addrule($ruleset, "PVEFW-FWBR-IN",
2277                         "-m physdev --physdev-is-bridged --physdev-out $iface", "-j $tapchain");
2278     } else {
2279         ruleset_addrule($ruleset, "PVEFW-FWBR-OUT",
2280                         "-m physdev --physdev-is-bridged --physdev-in $iface", "-j $tapchain");
2281     }
2282 }
2283
2284 sub enable_host_firewall {
2285     my ($ruleset, $hostfw_conf, $cluster_conf, $ipversion) = @_;
2286
2287     my $options = $hostfw_conf->{options};
2288     my $cluster_options = $cluster_conf->{options};
2289     my $rules = $hostfw_conf->{rules};
2290     my $cluster_rules = $cluster_conf->{rules};
2291
2292     # host inbound firewall
2293     my $chain = "PVEFW-HOST-IN";
2294     ruleset_create_chain($ruleset, $chain);
2295
2296     my $loglevel = get_option_log_level($options, "log_level_in");
2297
2298     ruleset_addrule($ruleset, $chain, "-i lo", "-j ACCEPT");
2299
2300     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2301     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'IN', '-j RETURN');
2302     ruleset_chain_add_input_filters($ruleset, $chain, $ipversion, $options, $cluster_conf, $loglevel);
2303
2304     # we use RETURN because we need to check also tap rules
2305     my $accept_action = 'RETURN';
2306
2307     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2308
2309     # add host rules first, so that cluster wide rules can be overwritten
2310     foreach my $rule (@$rules, @$cluster_rules) {
2311         next if !$rule->{enable} || $rule->{errors};
2312         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2313
2314         $rule->{iface_in} = $rule->{iface} if $rule->{iface};
2315
2316         eval {
2317             if ($rule->{type} eq 'group') {
2318                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'IN', $accept_action, $ipversion);
2319             } elsif ($rule->{type} eq 'in') {
2320                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2321                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2322             }
2323         };
2324         warn $@ if $@;
2325         delete $rule->{iface_in};
2326     }
2327
2328     # allow standard traffic for management ipset (includes cluster network)
2329     my $mngmnt_ipset_chain = compute_ipset_chain_name(0, "management", $ipversion);
2330     my $mngmntsrc = "-m set --match-set ${mngmnt_ipset_chain} src";
2331     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 8006", "-j $accept_action");  # PVE API
2332     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2333     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2334     ruleset_addrule($ruleset, $chain, "$mngmntsrc -p tcp --dport 22", "-j $accept_action");  # SSH
2335
2336     my $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
2337     my $localnet_ver = $cluster_conf->{aliases}->{local_network}->{ipversion};
2338
2339     # corosync
2340     if ($localnet && ($ipversion == $localnet_ver)) {
2341         my $corosync_rule = "-p udp --dport 5404:5405";
2342         ruleset_addrule($ruleset, $chain, "-s $localnet -d $localnet $corosync_rule", "-j $accept_action");
2343         ruleset_addrule($ruleset, $chain, "-s $localnet -m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2344     }
2345
2346     # implement input policy
2347     my $policy = $cluster_options->{policy_in} || 'DROP'; # allow nothing by default
2348     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2349
2350     # host outbound firewall
2351     $chain = "PVEFW-HOST-OUT";
2352     ruleset_create_chain($ruleset, $chain);
2353
2354     $loglevel = get_option_log_level($options, "log_level_out");
2355
2356     ruleset_addrule($ruleset, $chain, "-o lo", "-j ACCEPT");
2357
2358     ruleset_chain_add_conn_filters($ruleset, $chain, 'ACCEPT');
2359
2360     # we use RETURN because we may want to check other thigs later
2361     $accept_action = 'RETURN';
2362     ruleset_chain_add_ndp($ruleset, $chain, $ipversion, $options, 'OUT', "-j $accept_action");
2363
2364     ruleset_addrule($ruleset, $chain, "-p igmp", "-j $accept_action"); # important for multicast
2365
2366     # add host rules first, so that cluster wide rules can be overwritten
2367     foreach my $rule (@$rules, @$cluster_rules) {
2368         next if !$rule->{enable} || $rule->{errors};
2369         next if $rule->{ipversion} && ($rule->{ipversion} != $ipversion);
2370
2371         $rule->{iface_out} = $rule->{iface} if $rule->{iface};
2372         eval {
2373             if ($rule->{type} eq 'group') {
2374                 ruleset_add_group_rule($ruleset, $cluster_conf, $chain, $rule, 'OUT', $accept_action, $ipversion);
2375             } elsif ($rule->{type} eq 'out') {
2376                 rule_substitude_action($rule, { ACCEPT => $accept_action, REJECT => "PVEFW-reject" });
2377                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf, $hostfw_conf);
2378             }
2379         };
2380         warn $@ if $@;
2381         delete $rule->{iface_out};
2382     }
2383
2384     # allow standard traffic on cluster network
2385     if ($localnet && ($ipversion == $localnet_ver)) {
2386         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 8006", "-j $accept_action");  # PVE API
2387         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 22", "-j $accept_action");  # SSH
2388         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 5900:5999", "-j $accept_action");  # PVE VNC Console
2389         ruleset_addrule($ruleset, $chain, "-d $localnet -p tcp --dport 3128", "-j $accept_action");  # SPICE Proxy
2390
2391         my $corosync_rule = "-p udp --dport 5404:5405";
2392         ruleset_addrule($ruleset, $chain, "-d $localnet $corosync_rule", "-j $accept_action");
2393         ruleset_addrule($ruleset, $chain, "-m addrtype --dst-type MULTICAST $corosync_rule", "-j $accept_action");
2394     }
2395
2396     # implement output policy
2397     $policy = $cluster_options->{policy_out} || 'ACCEPT'; # allow everything by default
2398     ruleset_add_chain_policy($ruleset, $chain, $ipversion, 0, $policy, $loglevel, $accept_action);
2399
2400     ruleset_addrule($ruleset, "PVEFW-OUTPUT", "", "-j PVEFW-HOST-OUT");
2401     ruleset_addrule($ruleset, "PVEFW-INPUT", "", "-j PVEFW-HOST-IN");
2402 }
2403
2404 sub generate_group_rules {
2405     my ($ruleset, $cluster_conf, $group, $ipversion) = @_;
2406
2407     my $rules = $cluster_conf->{groups}->{$group};
2408
2409     if (!$rules) {
2410         warn "no such security group '$group'\n";
2411         $rules = []; # create empty chain
2412     }
2413
2414     my $chain = "GROUP-${group}-IN";
2415
2416     ruleset_create_chain($ruleset, $chain);
2417     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2418
2419     foreach my $rule (@$rules) {
2420         next if $rule->{type} ne 'in';
2421         next if !$rule->{enable} || $rule->{errors};
2422         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2423         rule_substitude_action($rule, { ACCEPT => "PVEFW-SET-ACCEPT-MARK", REJECT => "PVEFW-reject" });
2424         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2425     }
2426
2427     $chain = "GROUP-${group}-OUT";
2428
2429     ruleset_create_chain($ruleset, $chain);
2430     ruleset_addrule($ruleset, $chain, "", "-j MARK --set-mark $FWACCEPTMARK_OFF"); # clear mark
2431
2432     foreach my $rule (@$rules) {
2433         next if $rule->{type} ne 'out';
2434         next if !$rule->{enable} || $rule->{errors};
2435         next if $rule->{ipversion} && $rule->{ipversion} ne $ipversion;
2436         # we use PVEFW-SET-ACCEPT-MARK (Instead of ACCEPT) because we need to
2437         # check also other tap rules later
2438         rule_substitude_action($rule, { ACCEPT => 'PVEFW-SET-ACCEPT-MARK', REJECT => "PVEFW-reject" });
2439         ruleset_generate_rule($ruleset, $chain, $ipversion, $rule, $cluster_conf);
2440     }
2441 }
2442
2443 my $MAX_NETS = 32;
2444 my $valid_netdev_names = {};
2445 for (my $i = 0; $i < $MAX_NETS; $i++)  {
2446     $valid_netdev_names->{"net$i"} = 1;
2447 }
2448
2449 sub get_mark_values {
2450     my ($value, $mask) = @_;
2451     $value = hex($value) if $value =~ /^0x/;
2452     $mask = hex($mask) if defined($mask) && $mask =~ /^0x/;
2453     $mask = 0xffffffff if !defined($mask);
2454     return ($value, $mask);
2455 }
2456
2457 sub parse_fw_rule {
2458     my ($prefix, $line, $cluster_conf, $fw_conf, $rule_env, $verbose) = @_;
2459
2460     my $orig_line = $line;
2461
2462     my $rule = {};
2463
2464     # we can add single line comments to the end of the rule
2465     if ($line =~ s/#\s*(.*?)\s*$//) {
2466         $rule->{comment} = decode('utf8', $1);
2467     }
2468
2469     # we can disable a rule when prefixed with '|'
2470
2471     $rule->{enable} = $line =~ s/^\|// ? 0 : 1;
2472
2473     $line =~ s/^(\S+)\s+(\S+)\s*// ||
2474         die "unable to parse rule: $line\n";
2475
2476     $rule->{type} = lc($1);
2477     $rule->{action} = $2;
2478
2479     if ($rule->{type} eq  'in' || $rule->{type} eq 'out') {
2480         if ($rule->{action} =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
2481             $rule->{macro} = $1;
2482             $rule->{action} = $2;
2483         }
2484     }
2485
2486     while (length($line)) {
2487         if ($line =~ s/^-i (\S+)\s*//) {
2488             $rule->{iface} = $1;
2489             next;
2490         }
2491
2492         last if $rule->{type} eq 'group';
2493
2494         if ($line =~ s/^-p (\S+)\s*//) {
2495             $rule->{proto} = $1;
2496             next;
2497         }
2498
2499         if ($line =~ s/^-dport (\S+)\s*//) {
2500             $rule->{dport} = $1;
2501             next;
2502         }
2503
2504         if ($line =~ s/^-sport (\S+)\s*//) {
2505             $rule->{sport} = $1;
2506             next;
2507         }
2508         if ($line =~ s/^-source (\S+)\s*//) {
2509             $rule->{source} = $1;
2510             next;
2511         }
2512         if ($line =~ s/^-dest (\S+)\s*//) {
2513             $rule->{dest} = $1;
2514             next;
2515         }
2516
2517         last;
2518     }
2519
2520     die "unable to parse rule parameters: $line\n" if length($line);
2521
2522     $rule = verify_rule($rule, $cluster_conf, $fw_conf, $rule_env, 1);
2523     if ($rule->{errors}) {
2524         # The verbose flag really means we're running from the CLI and want
2525         # output on the console - in the other case we really want such errors
2526         # to go into the syslog instead.
2527         my $log = $verbose ? sub { warn @_ } : sub { syslog(err => @_) };
2528         $log->("$prefix - errors in rule parameters: $orig_line\n");
2529         foreach my $p (keys %{$rule->{errors}}) {
2530             $log->("  $p: $rule->{errors}->{$p}\n");
2531         }
2532     }
2533
2534     return $rule;
2535 }
2536
2537 sub parse_vmfw_option {
2538     my ($line) = @_;
2539
2540     my ($opt, $value);
2541
2542     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2543
2544     if ($line =~ m/^(enable|dhcp|ndp|radv|macfilter|ipfilter|ips):\s*(0|1)\s*$/i) {
2545         $opt = lc($1);
2546         $value = int($2);
2547     } elsif ($line =~ m/^(log_level_in|log_level_out):\s*(($loglevels)\s*)?$/i) {
2548         $opt = lc($1);
2549         $value = $2 ? lc($3) : '';
2550     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2551         $opt = lc($1);
2552         $value = uc($3);
2553     } elsif ($line =~ m/^(ips_queues):\s*((\d+)(:(\d+))?)\s*$/i) {
2554         $opt = lc($1);
2555         $value = $2;
2556     } else {
2557         die "can't parse option '$line'\n"
2558     }
2559
2560     return ($opt, $value);
2561 }
2562
2563 sub parse_hostfw_option {
2564     my ($line) = @_;
2565
2566     my ($opt, $value);
2567
2568     my $loglevels = "emerg|alert|crit|err|warning|notice|info|debug|nolog";
2569
2570     if ($line =~ m/^(enable|nosmurfs|tcpflags|ndp):\s*(0|1)\s*$/i) {
2571         $opt = lc($1);
2572         $value = int($2);
2573     } elsif ($line =~ m/^(log_level_in|log_level_out|tcp_flags_log_level|smurf_log_level):\s*(($loglevels)\s*)?$/i) {
2574         $opt = lc($1);
2575         $value = $2 ? lc($3) : '';
2576     } elsif ($line =~ m/^(nf_conntrack_max|nf_conntrack_tcp_timeout_established):\s*(\d+)\s*$/i) {
2577         $opt = lc($1);
2578         $value = int($2);
2579     } else {
2580         die "can't parse option '$line'\n"
2581     }
2582
2583     return ($opt, $value);
2584 }
2585
2586 sub parse_clusterfw_option {
2587     my ($line) = @_;
2588
2589     my ($opt, $value);
2590
2591     if ($line =~ m/^(enable):\s*(\d+)\s*$/i) {
2592         $opt = lc($1);
2593         $value = int($2);
2594         if (($value > 1) && ((time() - $value) > 60)) {
2595             $value = 0
2596         }
2597     } elsif ($line =~ m/^(policy_(in|out)):\s*(ACCEPT|DROP|REJECT)\s*$/i) {
2598         $opt = lc($1);
2599         $value = uc($3);
2600     } else {
2601         die "can't parse option '$line'\n"
2602     }
2603
2604     return ($opt, $value);
2605 }
2606
2607 sub resolve_alias {
2608     my ($clusterfw_conf, $fw_conf, $cidr) = @_;
2609
2610     my $alias = lc($cidr);
2611     my $e = $fw_conf ? $fw_conf->{aliases}->{$alias} : undef;
2612     $e = $clusterfw_conf->{aliases}->{$alias} if !$e && $clusterfw_conf;
2613
2614     die "no such alias '$cidr'\n" if !$e;;
2615
2616     return wantarray ? ($e->{cidr}, $e->{ipversion}) : $e->{cidr};
2617 }
2618
2619 sub parse_ip_or_cidr {
2620     my ($cidr) = @_;
2621
2622     my $ipversion;
2623
2624     if ($cidr =~ m!^(?:$IPV6RE)(/(\d+))?$!) {
2625         $cidr =~ s|/128$||;
2626         $ipversion = 6;
2627     } elsif ($cidr =~ m!^(?:$IPV4RE)(/(\d+))?$!) {
2628         $cidr =~ s|/32$||;
2629         $ipversion = 4;
2630     } else {
2631         die "value does not look like a valid IP address or CIDR network\n";
2632     }
2633
2634     return wantarray ? ($cidr, $ipversion) : $cidr;
2635 }
2636
2637 sub parse_alias {
2638     my ($line) = @_;
2639
2640     # we can add single line comments to the end of the line
2641     my $comment = decode('utf8', $1) if $line =~ s/\s*#\s*(.*?)\s*$//;
2642
2643     if ($line =~ m/^(\S+)\s(\S+)$/) {
2644         my ($name, $cidr) = ($1, $2);
2645         my $ipversion;
2646
2647         ($cidr, $ipversion) = parse_ip_or_cidr($cidr);
2648
2649         my $data = {
2650             name => $name,
2651             cidr => $cidr,
2652             ipversion => $ipversion,
2653         };
2654         $data->{comment} = $comment  if $comment;
2655         return $data;
2656     }
2657
2658     return undef;
2659 }
2660
2661 sub generic_fw_config_parser {
2662     my ($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env) = @_;
2663
2664     my $section;
2665     my $group;
2666
2667     my $res = $empty_conf;
2668
2669     while (defined(my $line = <$fh>)) {
2670         next if $line =~ m/^#/;
2671         next if $line =~ m/^\s*$/;
2672
2673         chomp $line;
2674
2675         my $linenr = $fh->input_line_number();
2676         my $prefix = "$filename (line $linenr)";
2677
2678         if ($empty_conf->{options} && ($line =~ m/^\[options\]$/i)) {
2679             $section = 'options';
2680             next;
2681         }
2682
2683         if ($empty_conf->{aliases} && ($line =~ m/^\[aliases\]$/i)) {
2684             $section = 'aliases';
2685             next;
2686         }
2687
2688         if ($empty_conf->{groups} && ($line =~ m/^\[group\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2689             $section = 'groups';
2690             $group = lc($1);
2691             my $comment = $2;
2692             eval {
2693                 die "security group name too long\n" if length($group) > $max_group_name_length;
2694                 die "invalid security group name '$group'\n" if $group !~ m/^${security_group_name_pattern}$/;
2695             };
2696             if (my $err = $@) {
2697                 ($section, $group, $comment) = undef;
2698                 warn "$prefix: $err";
2699                 next;
2700             }
2701
2702             $res->{$section}->{$group} = [];
2703             $res->{group_comments}->{$group} =  decode('utf8', $comment)
2704                 if $comment;
2705             next;
2706         }
2707
2708         if ($empty_conf->{rules} && ($line =~ m/^\[rules\]$/i)) {
2709             $section = 'rules';
2710             next;
2711         }
2712
2713         if ($empty_conf->{ipset} && ($line =~ m/^\[ipset\s+(\S+)\]\s*(?:#\s*(.*?)\s*)?$/i)) {
2714             $section = 'ipset';
2715             $group = lc($1);
2716             my $comment = $2;
2717             eval {
2718                 die "ipset name too long\n" if length($group) > $max_ipset_name_length;
2719                 die "invalid ipset name '$group'\n" if $group !~ m/^${ipset_name_pattern}$/;
2720             };
2721             if (my $err = $@) {
2722                 ($section, $group, $comment) = undef;
2723                 warn "$prefix: $err";
2724                 next;
2725             }
2726
2727             $res->{$section}->{$group} = [];
2728             $res->{ipset_comments}->{$group} = decode('utf8', $comment)
2729                 if $comment;
2730             next;
2731         }
2732
2733         if (!$section) {
2734             warn "$prefix: skip line - no section\n";
2735             next;
2736         }
2737
2738         if ($section eq 'options') {
2739             eval {
2740                 my ($opt, $value);
2741                 if ($rule_env eq 'cluster') {
2742                     ($opt, $value) = parse_clusterfw_option($line);
2743                 } elsif ($rule_env eq 'host') {
2744                     ($opt, $value) = parse_hostfw_option($line);
2745                 } else {
2746                     ($opt, $value) = parse_vmfw_option($line);
2747                 }
2748                 $res->{options}->{$opt} = $value;
2749             };
2750             warn "$prefix: $@" if $@;
2751         } elsif ($section eq 'aliases') {
2752             eval {
2753                 my $data = parse_alias($line);
2754                 $res->{aliases}->{lc($data->{name})} = $data;
2755             };
2756             warn "$prefix: $@" if $@;
2757         } elsif ($section eq 'rules') {
2758             my $rule;
2759             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, $res, $rule_env, $verbose); };
2760             if (my $err = $@) {
2761                 warn "$prefix: $err";
2762                 next;
2763             }
2764             push @{$res->{$section}}, $rule;
2765         } elsif ($section eq 'groups') {
2766             my $rule;
2767             eval { $rule = parse_fw_rule($prefix, $line, $cluster_conf, undef, 'group', $verbose); };
2768             if (my $err = $@) {
2769                 warn "$prefix: $err";
2770                 next;
2771             }
2772             push @{$res->{$section}->{$group}}, $rule;
2773         } elsif ($section eq 'ipset') {
2774             # we can add single line comments to the end of the rule
2775             my $comment = decode('utf8', $1) if $line =~ s/#\s*(.*?)\s*$//;
2776
2777             $line =~ m/^(\!)?\s*(\S+)\s*$/;
2778             my $nomatch = $1;
2779             my $cidr = $2;
2780             my $errors;
2781
2782             if ($nomatch && !$feature_ipset_nomatch) {
2783                 $errors->{nomatch} = "nomatch not supported by kernel";
2784             }
2785
2786             eval {
2787                 if ($cidr =~ m/^${ip_alias_pattern}$/) {
2788                     resolve_alias($cluster_conf, $res, $cidr); # make sure alias exists
2789                 } else {
2790                     $cidr = parse_ip_or_cidr($cidr);
2791                 }
2792             };
2793             if (my $err = $@) {
2794                 chomp $err;
2795                 $errors->{cidr} = $err;
2796             }
2797
2798             if ($cidr =~ m!/0+$!) {
2799                 $errors->{cidr} = "a zero prefix is not allowed in ipset entries\n";
2800             }
2801
2802             my $entry = { cidr => $cidr };
2803             $entry->{nomatch} = 1 if $nomatch;
2804             $entry->{comment} = $comment if $comment;
2805             $entry->{errors} =  $errors if $errors;
2806
2807             if ($verbose && $errors) {
2808                 warn "$prefix - errors in ipset '$group': $line\n";
2809                 foreach my $p (keys %{$errors}) {
2810                     warn "  $p: $errors->{$p}\n";
2811                 }
2812             }
2813
2814             push @{$res->{$section}->{$group}}, $entry;
2815         } else {
2816             warn "$prefix: skip line - unknown section\n";
2817             next;
2818         }
2819     }
2820
2821     return $res;
2822 }
2823
2824 sub parse_hostfw_config {
2825     my ($filename, $fh, $cluster_conf, $verbose) = @_;
2826
2827     my $empty_conf = { rules => [], options => {}};
2828
2829     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, 'host');
2830 }
2831
2832 sub parse_vmfw_config {
2833     my ($filename, $fh, $cluster_conf, $rule_env, $verbose) = @_;
2834
2835     my $empty_conf = {
2836         rules => [],
2837         options => {},
2838         aliases => {},
2839         ipset => {} ,
2840         ipset_comments => {},
2841     };
2842
2843     return generic_fw_config_parser($filename, $fh, $verbose, $cluster_conf, $empty_conf, $rule_env);
2844 }
2845
2846 sub parse_clusterfw_config {
2847     my ($filename, $fh, $verbose) = @_;
2848
2849     my $section;
2850     my $group;
2851
2852     my $empty_conf = {
2853         rules => [],
2854         options => {},
2855         aliases => {},
2856         groups => {},
2857         group_comments => {},
2858         ipset => {} ,
2859         ipset_comments => {},
2860     };
2861
2862     return generic_fw_config_parser($filename, $fh, $verbose, $empty_conf, $empty_conf, 'cluster');
2863 }
2864
2865 sub run_locked {
2866     my ($code, @param) = @_;
2867
2868     my $timeout = 10;
2869
2870     my $res = lock_file($pve_fw_lock_filename, $timeout, $code, @param);
2871
2872     die $@ if $@;
2873
2874     return $res;
2875 }
2876
2877 sub read_local_vm_config {
2878
2879     my $qemu = {};
2880     my $lxc = {};
2881
2882     my $vmdata = { qemu => $qemu, lxc => $lxc };
2883
2884     my $vmlist = PVE::Cluster::get_vmlist();
2885     return $vmdata if !$vmlist || !$vmlist->{ids};
2886     my $ids = $vmlist->{ids};
2887
2888     foreach my $vmid (keys %$ids) {
2889         next if !$vmid; # skip VE0
2890         my $d = $ids->{$vmid};
2891         next if !$d->{node} || $d->{node} ne $nodename;
2892         next if !$d->{type};
2893         if ($d->{type} eq 'qemu') {
2894             if ($have_qemu_server) {
2895                 my $cfspath = PVE::QemuConfig->cfs_config_path($vmid);
2896                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2897                     $qemu->{$vmid} = $conf;
2898                 }
2899             }
2900         } elsif ($d->{type} eq 'lxc') {
2901             if ($have_lxc) {
2902                 my $cfspath = PVE::LXC::Config->cfs_config_path($vmid);
2903                 if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
2904                     $lxc->{$vmid} = $conf;
2905                 }
2906             }
2907         }
2908     }
2909
2910     return $vmdata;
2911 };
2912
2913 sub load_vmfw_conf {
2914     my ($cluster_conf, $rule_env, $vmid, $dir, $verbose) = @_;
2915
2916     my $vmfw_conf = {};
2917
2918     $dir = $pvefw_conf_dir if !defined($dir);
2919
2920     my $filename = "$dir/$vmid.fw";
2921     if (my $fh = IO::File->new($filename, O_RDONLY)) {
2922         $vmfw_conf = parse_vmfw_config($filename, $fh, $cluster_conf, $rule_env, $verbose);
2923         $vmfw_conf->{vmid} = $vmid;
2924     }
2925
2926     return $vmfw_conf;
2927 }
2928
2929 my $format_rules = sub {
2930     my ($rules, $allow_iface) = @_;
2931
2932     my $raw = '';
2933
2934     foreach my $rule (@$rules) {
2935         if ($rule->{type} eq  'in' || $rule->{type} eq 'out' || $rule->{type} eq 'group') {
2936             $raw .= '|' if defined($rule->{enable}) && !$rule->{enable};
2937             $raw .= uc($rule->{type});
2938             if ($rule->{macro}) {
2939                 $raw .= " $rule->{macro}($rule->{action})";
2940             } else {
2941                 $raw .= " " . $rule->{action};
2942             }
2943             if ($allow_iface && $rule->{iface}) {
2944                 $raw .= " -i $rule->{iface}";
2945             }
2946
2947             if ($rule->{type} ne  'group')  {
2948                 $raw .= " -source $rule->{source}" if $rule->{source};
2949                 $raw .= " -dest $rule->{dest}" if $rule->{dest};
2950                 $raw .= " -p $rule->{proto}" if $rule->{proto};
2951                 $raw .= " -dport $rule->{dport}" if $rule->{dport};
2952                 $raw .= " -sport $rule->{sport}" if $rule->{sport};
2953             }
2954
2955             $raw .= " # " . encode('utf8', $rule->{comment})
2956                 if $rule->{comment} && $rule->{comment} !~ m/^\s*$/;
2957             $raw .= "\n";
2958         } else {
2959             die "unknown rule type '$rule->{type}'";
2960         }
2961     }
2962
2963     return $raw;
2964 };
2965
2966 my $format_options = sub {
2967     my ($options) = @_;
2968
2969     my $raw = '';
2970
2971     $raw .= "[OPTIONS]\n\n";
2972     foreach my $opt (keys %$options) {
2973         $raw .= "$opt: $options->{$opt}\n";
2974     }
2975     $raw .= "\n";
2976
2977     return $raw;
2978 };
2979
2980 my $format_aliases = sub {
2981     my ($aliases) = @_;
2982
2983     my $raw = '';
2984
2985     $raw .= "[ALIASES]\n\n";
2986     foreach my $k (keys %$aliases) {
2987         my $e = $aliases->{$k};
2988         $raw .= "$e->{name} $e->{cidr}";
2989         $raw .= " # " . encode('utf8', $e->{comment})
2990             if $e->{comment} && $e->{comment} !~ m/^\s*$/;
2991         $raw .= "\n";
2992     }
2993     $raw .= "\n";
2994
2995     return $raw;
2996 };
2997
2998 my $format_ipsets = sub {
2999     my ($fw_conf) = @_;
3000
3001     my $raw = '';
3002
3003     foreach my $ipset (sort keys %{$fw_conf->{ipset}}) {
3004         if (my $comment = $fw_conf->{ipset_comments}->{$ipset}) {
3005             my $utf8comment = encode('utf8', $comment);
3006             $raw .= "[IPSET $ipset] # $utf8comment\n\n";
3007         } else {
3008             $raw .= "[IPSET $ipset]\n\n";
3009         }
3010         my $options = $fw_conf->{ipset}->{$ipset};
3011
3012         my $nethash = {};
3013         foreach my $entry (@$options) {
3014             $nethash->{$entry->{cidr}} = $entry;
3015         }
3016
3017         foreach my $cidr (sort keys %$nethash) {
3018             my $entry = $nethash->{$cidr};
3019             my $line = $entry->{nomatch} ? '!' : '';
3020             $line .= $entry->{cidr};
3021             $line .= " # " . encode('utf8', $entry->{comment})
3022                 if $entry->{comment} && $entry->{comment} !~ m/^\s*$/;
3023             $raw .= "$line\n";
3024         }
3025
3026         $raw .= "\n";
3027     }
3028
3029     return $raw;
3030 };
3031
3032 sub save_vmfw_conf {
3033     my ($vmid, $vmfw_conf) = @_;
3034
3035     my $raw = '';
3036
3037     my $options = $vmfw_conf->{options};
3038     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3039
3040     my $aliases = $vmfw_conf->{aliases};
3041     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3042
3043     $raw .= &$format_ipsets($vmfw_conf) if $vmfw_conf->{ipset};
3044
3045     my $rules = $vmfw_conf->{rules} || [];
3046     if ($rules && scalar(@$rules)) {
3047         $raw .= "[RULES]\n\n";
3048         $raw .= &$format_rules($rules, 1);
3049         $raw .= "\n";
3050     }
3051
3052     my $filename = "$pvefw_conf_dir/$vmid.fw";
3053     if ($raw) {
3054         mkdir $pvefw_conf_dir;
3055         PVE::Tools::file_set_contents($filename, $raw);
3056     } else {
3057         unlink $filename;
3058     }
3059 }
3060
3061 sub remove_vmfw_conf {
3062     my ($vmid) = @_;
3063
3064     my $vmfw_conffile = "$pvefw_conf_dir/$vmid.fw";
3065
3066     unlink $vmfw_conffile;
3067 }
3068
3069 sub clone_vmfw_conf {
3070     my ($vmid, $newid) = @_;
3071
3072     my $sourcevm_conffile = "$pvefw_conf_dir/$vmid.fw";
3073     my $clonevm_conffile = "$pvefw_conf_dir/$newid.fw";
3074
3075     if (-f $clonevm_conffile) {
3076         unlink $clonevm_conffile;
3077     }
3078     if (-f $sourcevm_conffile) {
3079         my $data = PVE::Tools::file_get_contents($sourcevm_conffile);
3080         PVE::Tools::file_set_contents($clonevm_conffile, $data);
3081     }
3082 }
3083
3084 sub read_vm_firewall_configs {
3085     my ($cluster_conf, $vmdata, $dir, $verbose) = @_;
3086
3087     my $vmfw_configs = {};
3088
3089     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3090         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'vm', $vmid, $dir, $verbose);
3091         next if !$vmfw_conf->{options}; # skip if file does not exists
3092         $vmfw_configs->{$vmid} = $vmfw_conf;
3093     }
3094     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3095         my $vmfw_conf = load_vmfw_conf($cluster_conf, 'ct', $vmid, $dir, $verbose);
3096         next if !$vmfw_conf->{options}; # skip if file does not exists
3097         $vmfw_configs->{$vmid} = $vmfw_conf;
3098     }
3099
3100     return $vmfw_configs;
3101 }
3102
3103 sub get_option_log_level {
3104     my ($options, $k) = @_;
3105
3106     my $v = $options->{$k};
3107     $v = $default_log_level if !defined($v);
3108
3109     return undef if $v eq '' || $v eq 'nolog';
3110
3111     $v = $log_level_hash->{$v} if defined($log_level_hash->{$v});
3112
3113     return $v if ($v >= 0) && ($v <= 7);
3114
3115     warn "unknown log level ($k = '$v')\n";
3116
3117     return undef;
3118 }
3119
3120 sub generate_std_chains {
3121     my ($ruleset, $options, $ipversion) = @_;
3122
3123     my $std_chains = $pve_std_chains->{$ipversion} || die "internal error";
3124
3125     my $loglevel = get_option_log_level($options, 'smurf_log_level');
3126     my $chain = 'PVEFW-smurflog';
3127     if ( $std_chains->{$chain} ) {
3128         foreach my $r (@{$std_chains->{$chain}}) {
3129           $r->{log} = $loglevel;
3130         }
3131     }
3132
3133     # same as shorewall logflags action.
3134     $loglevel = get_option_log_level($options, 'tcp_flags_log_level');
3135     $chain = 'PVEFW-logflags';
3136     if ( $std_chains->{$chain} ) {
3137         foreach my $r (@{$std_chains->{$chain}}) {
3138           $r->{log} = $loglevel;
3139         }
3140     }
3141
3142     foreach my $chain (keys %$std_chains) {
3143         ruleset_create_chain($ruleset, $chain);
3144         foreach my $rule (@{$std_chains->{$chain}}) {
3145             if (ref($rule)) {
3146                 ruleset_generate_rule($ruleset, $chain, $ipversion, $rule);
3147             } else {
3148                 die "rule $rule as string - should not happen";
3149             }
3150         }
3151     }
3152 }
3153
3154 sub generate_ipset_chains {
3155     my ($ipset_ruleset, $clusterfw_conf, $fw_conf, $device_ips, $ipsets) = @_;
3156
3157     foreach my $ipset (keys %{$ipsets}) {
3158
3159         my $options = $ipsets->{$ipset};
3160
3161         if ($device_ips && $ipset =~ /^ipfilter-(net\d+)$/) {
3162             if (my $ips = $device_ips->{$1}) {
3163                 $options = [@$options, @$ips];
3164             }
3165         }
3166
3167         # remove duplicates
3168         my $nethash = {};
3169         foreach my $entry (@$options) {
3170             next if $entry->{errors}; # skip entries with errors
3171             eval {
3172                 my ($cidr, $ver);
3173                 if ($entry->{cidr} =~ m/^${ip_alias_pattern}$/) {
3174                     ($cidr, $ver) = resolve_alias($clusterfw_conf, $fw_conf, $entry->{cidr});
3175                 } else {
3176                     ($cidr, $ver) = parse_ip_or_cidr($entry->{cidr});
3177                 }
3178                 #http://backreference.org/2013/03/01/ipv6-address-normalization/
3179                 if ($ver == 6) {
3180                     # ip_compress_address takes an address only, no CIDR
3181                     my ($addr, $prefix_len) = ($cidr =~ m@^([^/]*)(/.*)?$@);
3182                     $cidr = lc(Net::IP::ip_compress_address($addr, 6));
3183                     $cidr .= $prefix_len if defined($prefix_len);
3184                     $cidr =~ s|/128$||;
3185                 } else {
3186                     $cidr =~ s|/32$||;
3187                 }
3188
3189                 $nethash->{$ver}->{$cidr} = { cidr => $cidr, nomatch => $entry->{nomatch} };
3190             };
3191             warn $@ if $@;
3192         }
3193
3194         foreach my $ipversion (4, 6) {
3195             my $data = $nethash->{$ipversion};
3196
3197             my $name = compute_ipset_chain_name($fw_conf->{vmid}, $ipset, $ipversion);
3198
3199             my $hashsize = scalar(@$options);
3200             if ($hashsize <= 64) {
3201                 $hashsize = 64;
3202             } else {
3203                 $hashsize = round_powerof2($hashsize);
3204             }
3205
3206             my $family = $ipversion == "6" ? "inet6" : "inet";
3207
3208             $ipset_ruleset->{$name} = ["create $name hash:net family $family hashsize $hashsize maxelem $hashsize"];
3209
3210             foreach my $cidr (sort keys %$data) {
3211                 my $entry = $data->{$cidr};
3212
3213                 my $cmd = "add $name $cidr";
3214                 if ($entry->{nomatch}) {
3215                     if ($feature_ipset_nomatch) {
3216                         push @{$ipset_ruleset->{$name}}, "$cmd nomatch";
3217                     } else {
3218                         warn "ignore !$cidr - nomatch not supported by kernel\n";
3219                     }
3220                 } else {
3221                     push @{$ipset_ruleset->{$name}}, $cmd;
3222                 }
3223             }
3224         }
3225     }
3226 }
3227
3228 sub round_powerof2 {
3229     my ($int) = @_;
3230
3231     $int--;
3232     $int |= $int >> $_ foreach (1,2,4,8,16);
3233     return ++$int;
3234 }
3235
3236 sub load_clusterfw_conf {
3237     my ($filename, $verbose) = @_;
3238
3239     $filename = $clusterfw_conf_filename if !defined($filename);
3240
3241     my $cluster_conf = {};
3242     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3243         $cluster_conf = parse_clusterfw_config($filename, $fh, $verbose);
3244     }
3245
3246     return $cluster_conf;
3247 }
3248
3249 sub save_clusterfw_conf {
3250     my ($cluster_conf) = @_;
3251
3252     my $raw = '';
3253
3254     my $options = $cluster_conf->{options};
3255     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3256
3257     my $aliases = $cluster_conf->{aliases};
3258     $raw .= &$format_aliases($aliases) if $aliases && scalar(keys %$aliases);
3259
3260     $raw .= &$format_ipsets($cluster_conf) if $cluster_conf->{ipset};
3261
3262     my $rules = $cluster_conf->{rules};
3263     if ($rules && scalar(@$rules)) {
3264         $raw .= "[RULES]\n\n";
3265         $raw .= &$format_rules($rules, 1);
3266         $raw .= "\n";
3267     }
3268
3269     if ($cluster_conf->{groups}) {
3270         foreach my $group (sort keys %{$cluster_conf->{groups}}) {
3271             my $rules = $cluster_conf->{groups}->{$group};
3272             if (my $comment = $cluster_conf->{group_comments}->{$group}) {
3273                 my $utf8comment = encode('utf8', $comment);
3274                 $raw .= "[group $group] # $utf8comment\n\n";
3275             } else {
3276                 $raw .= "[group $group]\n\n";
3277             }
3278
3279             $raw .= &$format_rules($rules, 0);
3280             $raw .= "\n";
3281         }
3282     }
3283
3284     if ($raw) {
3285         mkdir $pvefw_conf_dir;
3286         PVE::Tools::file_set_contents($clusterfw_conf_filename, $raw);
3287     } else {
3288         unlink $clusterfw_conf_filename;
3289     }
3290 }
3291
3292 sub load_hostfw_conf {
3293     my ($cluster_conf, $filename, $verbose) = @_;
3294
3295     $filename = $hostfw_conf_filename if !defined($filename);
3296
3297     my $hostfw_conf = {};
3298     if (my $fh = IO::File->new($filename, O_RDONLY)) {
3299         $hostfw_conf = parse_hostfw_config($filename, $fh, $cluster_conf, $verbose);
3300     }
3301     return $hostfw_conf;
3302 }
3303
3304 sub save_hostfw_conf {
3305     my ($hostfw_conf) = @_;
3306
3307     my $raw = '';
3308
3309     my $options = $hostfw_conf->{options};
3310     $raw .= &$format_options($options) if $options && scalar(keys %$options);
3311
3312     my $rules = $hostfw_conf->{rules};
3313     if ($rules && scalar(@$rules)) {
3314         $raw .= "[RULES]\n\n";
3315         $raw .= &$format_rules($rules, 1);
3316         $raw .= "\n";
3317     }
3318
3319     if ($raw) {
3320         PVE::Tools::file_set_contents($hostfw_conf_filename, $raw);
3321     } else {
3322         unlink $hostfw_conf_filename;
3323     }
3324 }
3325
3326 sub compile {
3327     my ($cluster_conf, $hostfw_conf, $vmdata, $verbose) = @_;
3328
3329     my $vmfw_configs;
3330
3331     # fixme: once we read standard chains from config this needs to be put in test/standard cases below
3332     $pve_std_chains = dclone($pve_std_chains_conf);
3333
3334     if ($vmdata) { # test mode
3335         my $testdir = $vmdata->{testdir} || die "no test directory specified";
3336         my $filename = "$testdir/cluster.fw";
3337         $cluster_conf = load_clusterfw_conf($filename, $verbose);
3338
3339         $filename = "$testdir/host.fw";
3340         $hostfw_conf = load_hostfw_conf($cluster_conf, $filename, $verbose);
3341
3342         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, $testdir, $verbose);
3343     } else { # normal operation
3344         $cluster_conf = load_clusterfw_conf(undef, $verbose) if !$cluster_conf;
3345
3346         $hostfw_conf = load_hostfw_conf($cluster_conf, undef, $verbose) if !$hostfw_conf;
3347
3348         $vmdata = read_local_vm_config();
3349         $vmfw_configs = read_vm_firewall_configs($cluster_conf, $vmdata, undef, $verbose);
3350     }
3351
3352     return ({},{},{}) if !$cluster_conf->{options}->{enable};
3353
3354     my $localnet;
3355     if ($cluster_conf->{aliases}->{local_network}) {
3356         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3357     } else {
3358         my $localnet_ver;
3359         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3360
3361         $cluster_conf->{aliases}->{local_network} = {
3362             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3363     }
3364
3365     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3366
3367     my $ruleset = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 4, $verbose);
3368     my $rulesetv6 = compile_iptables_filter($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, 6, $verbose);
3369     my $ipset_ruleset = compile_ipsets($cluster_conf, $vmfw_configs, $vmdata);
3370
3371     return ($ruleset, $ipset_ruleset, $rulesetv6);
3372 }
3373
3374 sub compile_iptables_filter {
3375     my ($cluster_conf, $hostfw_conf, $vmfw_configs, $vmdata, $ipversion, $verbose) = @_;
3376
3377     my $ruleset = {};
3378
3379     ruleset_create_chain($ruleset, "PVEFW-INPUT");
3380     ruleset_create_chain($ruleset, "PVEFW-OUTPUT");
3381
3382     ruleset_create_chain($ruleset, "PVEFW-FORWARD");
3383
3384     my $hostfw_options = $hostfw_conf->{options} || {};
3385
3386     # fixme: what log level should we use here?
3387     my $loglevel = get_option_log_level($hostfw_options, "log_level_out");
3388
3389     ruleset_chain_add_conn_filters($ruleset, "PVEFW-FORWARD", "ACCEPT");
3390
3391     ruleset_create_chain($ruleset, "PVEFW-FWBR-IN");
3392     ruleset_chain_add_input_filters($ruleset, "PVEFW-FWBR-IN", $ipversion, $hostfw_options, $cluster_conf, $loglevel);
3393
3394     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-in fwln+", "-j PVEFW-FWBR-IN");
3395
3396     ruleset_create_chain($ruleset, "PVEFW-FWBR-OUT");
3397     ruleset_addrule($ruleset, "PVEFW-FORWARD", "-m physdev --physdev-is-bridged --physdev-out fwln+", "-j PVEFW-FWBR-OUT");
3398
3399     generate_std_chains($ruleset, $hostfw_options, $ipversion);
3400
3401     my $hostfw_enable = !(defined($hostfw_options->{enable}) && ($hostfw_options->{enable} == 0));
3402
3403     if ($hostfw_enable) {
3404         eval { enable_host_firewall($ruleset, $hostfw_conf, $cluster_conf, $ipversion); };
3405         warn $@ if $@; # just to be sure - should not happen
3406     }
3407
3408     # generate firewall rules for QEMU VMs
3409     foreach my $vmid (sort keys %{$vmdata->{qemu}}) {
3410         eval {
3411             my $conf = $vmdata->{qemu}->{$vmid};
3412             my $vmfw_conf = $vmfw_configs->{$vmid};
3413             return if !$vmfw_conf;
3414
3415             foreach my $netid (sort keys %$conf) {
3416                 next if $netid !~ m/^net(\d+)$/;
3417                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3418                 next if !$net->{firewall};
3419                 my $iface = "tap${vmid}i$1";
3420
3421                 my $macaddr = $net->{macaddr};
3422                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3423                                              $vmfw_conf, $vmid, 'IN', $ipversion);
3424                 generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3425                                              $vmfw_conf, $vmid, 'OUT', $ipversion);
3426             }
3427         };
3428         warn $@ if $@; # just to be sure - should not happen
3429     }
3430
3431     # generate firewall rules for LXC containers
3432     foreach my $vmid (sort keys %{$vmdata->{lxc}}) {
3433         eval {
3434             my $conf = $vmdata->{lxc}->{$vmid};
3435             my $vmfw_conf = $vmfw_configs->{$vmid};
3436             return if !$vmfw_conf;
3437
3438             if ($vmfw_conf->{options}->{enable}) {
3439                 foreach my $netid (sort keys %$conf) {
3440                     next if $netid !~ m/^net(\d+)$/;
3441                     my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3442                     next if !$net->{firewall};
3443                     my $iface = "veth${vmid}i$1";
3444                     my $macaddr = $net->{hwaddr};
3445                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3446                                                  $vmfw_conf, $vmid, 'IN', $ipversion);
3447                     generate_tap_rules_direction($ruleset, $cluster_conf, $iface, $netid, $macaddr,
3448                                                  $vmfw_conf, $vmid, 'OUT', $ipversion);
3449                 }
3450             }
3451         };
3452         warn $@ if $@; # just to be sure - should not happen
3453     }
3454
3455     if(ruleset_chain_exist($ruleset, "PVEFW-IPS")){
3456         ruleset_insertrule($ruleset, "PVEFW-FORWARD", "-m conntrack --ctstate RELATED,ESTABLISHED", "-j PVEFW-IPS");
3457     }
3458
3459     return $ruleset;
3460 }
3461
3462 sub mac_to_linklocal {
3463     my ($macaddr) = @_;
3464     my @parts = split(/:/, $macaddr);
3465     # The standard link local address uses the fe80::/64 prefix with the
3466     # modified EUI-64 identifier derived from the MAC address by flipping the
3467     # universal/local bit and inserting FF:FE in the middle.
3468     # See RFC 4291.
3469     $parts[0] = sprintf("%02x", hex($parts[0]) ^ 0x02);
3470     my @meui64 = (@parts[0,1,2], 'ff', 'fe', @parts[3,4,5]);
3471     return "fe80::$parts[0]$parts[1]:$parts[2]FF:FE$parts[3]:$parts[4]$parts[5]";
3472 }
3473
3474 sub compile_ipsets {
3475     my ($cluster_conf, $vmfw_configs, $vmdata) = @_;
3476
3477     my $localnet;
3478     if ($cluster_conf->{aliases}->{local_network}) {
3479         $localnet = $cluster_conf->{aliases}->{local_network}->{cidr};
3480     } else {
3481         my $localnet_ver;
3482         ($localnet, $localnet_ver) = parse_ip_or_cidr(local_network() || '127.0.0.0/8');
3483
3484         $cluster_conf->{aliases}->{local_network} = {
3485             name => 'local_network', cidr => $localnet, ipversion => $localnet_ver };
3486     }
3487
3488     push @{$cluster_conf->{ipset}->{management}}, { cidr => $localnet };
3489
3490
3491     my $ipset_ruleset = {};
3492
3493     # generate ipsets for QEMU VMs
3494     foreach my $vmid (keys %{$vmdata->{qemu}}) {
3495         eval {
3496             my $conf = $vmdata->{qemu}->{$vmid};
3497             my $vmfw_conf = $vmfw_configs->{$vmid};
3498             return if !$vmfw_conf;
3499
3500             # When the 'ipfilter' option is enabled every device for which there
3501             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3502             # ipset.
3503             # The reason is that ipfilter ipsets are always filled with standard
3504             # IPv6 link-local filters.
3505             my $ipsets = $vmfw_conf->{ipset};
3506             my $implicit_sets = {};
3507
3508             my $device_ips = {};
3509             foreach my $netid (keys %$conf) {
3510                 next if $netid !~ m/^net(\d+)$/;
3511                 my $net = PVE::QemuServer::parse_net($conf->{$netid});
3512                 next if !$net->{firewall};
3513
3514                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3515                     $implicit_sets->{"ipfilter-$netid"} = [];
3516                 }
3517
3518                 my $macaddr = $net->{macaddr};
3519                 my $linklocal = mac_to_linklocal($macaddr);
3520                 $device_ips->{$netid} = [
3521                     { cidr => $linklocal },
3522                     { cidr => 'fe80::/10', nomatch => 1 }
3523                 ];
3524             }
3525
3526             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3527             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3528         };
3529         warn $@ if $@; # just to be sure - should not happen
3530     }
3531
3532     # generate firewall rules for LXC containers
3533     foreach my $vmid (keys %{$vmdata->{lxc}}) {
3534         eval {
3535             my $conf = $vmdata->{lxc}->{$vmid};
3536             my $vmfw_conf = $vmfw_configs->{$vmid};
3537             return if !$vmfw_conf;
3538
3539             # When the 'ipfilter' option is enabled every device for which there
3540             # is no 'ipfilter-netX' ipset defiend gets an implicit empty default
3541             # ipset.
3542             # The reason is that ipfilter ipsets are always filled with standard
3543             # IPv6 link-local filters, as well as the IP addresses configured
3544             # for the container.
3545             my $ipsets = $vmfw_conf->{ipset};
3546             my $implicit_sets = {};
3547
3548             my $device_ips = {};
3549             foreach my $netid (keys %$conf) {
3550                 next if $netid !~ m/^net(\d+)$/;
3551                 my $net = PVE::LXC::Config->parse_lxc_network($conf->{$netid});
3552                 next if !$net->{firewall};
3553
3554                 if ($vmfw_conf->{options}->{ipfilter} && !$ipsets->{"ipfilter-$netid"}) {
3555                     $implicit_sets->{"ipfilter-$netid"} = [];
3556                 }
3557
3558                 my $macaddr = $net->{hwaddr};
3559                 my $linklocal = mac_to_linklocal($macaddr);
3560                 my $set = $device_ips->{$netid} = [
3561                     { cidr => $linklocal },
3562                     { cidr => 'fe80::/10', nomatch => 1 }
3563                 ];
3564                 if (defined($net->{ip}) && $net->{ip} =~ m!^($IPV4RE)(?:/\d+)?$!) {
3565                     push @$set, { cidr => $1 };
3566                 }
3567                 if (defined($net->{ip6}) && $net->{ip6} =~ m!^($IPV6RE)(?:/\d+)?$!) {
3568                     push @$set, { cidr => $1 };
3569                 }
3570             }
3571
3572             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $ipsets);
3573             generate_ipset_chains($ipset_ruleset, $cluster_conf, $vmfw_conf, $device_ips, $implicit_sets);
3574         };
3575         warn $@ if $@; # just to be sure - should not happen
3576     }
3577
3578     generate_ipset_chains($ipset_ruleset, undef, $cluster_conf, undef, $cluster_conf->{ipset});
3579
3580     return $ipset_ruleset;
3581 }
3582
3583 sub get_ruleset_status {
3584     my ($ruleset, $active_chains, $digest_fn, $verbose) = @_;
3585
3586     my $statushash = {};
3587
3588     foreach my $chain (sort keys %$ruleset) {
3589         my $sig = &$digest_fn($ruleset->{$chain});
3590
3591         $statushash->{$chain}->{sig} = $sig;
3592
3593         my $oldsig = $active_chains->{$chain};
3594         if (!defined($oldsig)) {
3595             $statushash->{$chain}->{action} = 'create';
3596         } else {
3597             if ($oldsig eq $sig) {
3598                 $statushash->{$chain}->{action} = 'exists';
3599             } else {
3600                 $statushash->{$chain}->{action} = 'update';
3601             }
3602         }
3603         print "$statushash->{$chain}->{action} $chain ($sig)\n" if $verbose;
3604         foreach my $cmd (@{$ruleset->{$chain}}) {
3605             print "\t$cmd\n" if $verbose;
3606         }
3607     }
3608
3609     foreach my $chain (sort keys %$active_chains) {
3610         if (!defined($ruleset->{$chain})) {
3611             my $sig = $active_chains->{$chain};
3612             $statushash->{$chain}->{action} = 'delete';
3613             $statushash->{$chain}->{sig} = $sig;
3614             print "delete $chain ($sig)\n" if $verbose;
3615         }
3616     }
3617
3618     return $statushash;
3619 }
3620
3621 sub print_sig_rule {
3622     my ($chain, $sig) = @_;
3623
3624     # We just use this to store a SHA1 checksum used to detect changes
3625     return "-A $chain -m comment --comment \"PVESIG:$sig\"\n";
3626 }
3627
3628 sub get_ruleset_cmdlist {
3629     my ($ruleset, $verbose, $iptablescmd) = @_;
3630
3631     my $cmdlist = "*filter\n"; # we pass this to iptables-restore;
3632
3633     my ($active_chains, $hooks) = iptables_get_chains($iptablescmd);
3634     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, $verbose);
3635
3636     # create missing chains first
3637     foreach my $chain (sort keys %$ruleset) {
3638         my $stat = $statushash->{$chain};
3639         die "internal error" if !$stat;
3640         next if $stat->{action} ne 'create';
3641
3642         $cmdlist .= ":$chain - [0:0]\n";
3643     }
3644
3645     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3646         my $chain = "PVEFW-$h";
3647         if ($ruleset->{$chain} && !$hooks->{$h}) {
3648             $cmdlist .= "-A $h -j $chain\n";
3649         }
3650     }
3651
3652     foreach my $chain (sort keys %$ruleset) {
3653         my $stat = $statushash->{$chain};
3654         die "internal error" if !$stat;
3655
3656         if ($stat->{action} eq 'update' || $stat->{action} eq 'create') {
3657             $cmdlist .= "-F $chain\n";
3658             foreach my $cmd (@{$ruleset->{$chain}}) {
3659                 $cmdlist .= "$cmd\n";
3660             }
3661             $cmdlist .= print_sig_rule($chain, $stat->{sig});
3662         } elsif ($stat->{action} eq 'delete') {
3663             die "internal error"; # this should not happen
3664         } elsif ($stat->{action} eq 'exists') {
3665             # do nothing
3666         } else {
3667             die "internal error - unknown status '$stat->{action}'";
3668         }
3669     }
3670
3671     foreach my $chain (keys %$statushash) {
3672         next if $statushash->{$chain}->{action} ne 'delete';
3673         $cmdlist .= "-F $chain\n";
3674     }
3675     foreach my $chain (keys %$statushash) {
3676         next if $statushash->{$chain}->{action} ne 'delete';
3677         next if $chain eq 'PVEFW-INPUT';
3678         next if $chain eq 'PVEFW-OUTPUT';
3679         next if $chain eq 'PVEFW-FORWARD';
3680         $cmdlist .= "-X $chain\n";
3681     }
3682
3683     my $changes = $cmdlist ne "*filter\n" ? 1 : 0;
3684
3685     $cmdlist .= "COMMIT\n";
3686
3687     return wantarray ? ($cmdlist, $changes) : $cmdlist;
3688 }
3689
3690 sub get_ipset_cmdlist {
3691     my ($ruleset, $verbose) = @_;
3692
3693     my $cmdlist = "";
3694
3695     my $delete_cmdlist = "";
3696
3697     my $active_chains = ipset_get_chains();
3698     my $statushash = get_ruleset_status($ruleset, $active_chains, \&ipset_chain_digest, $verbose);
3699
3700     # remove stale _swap chains
3701     foreach my $chain (keys %$active_chains) {
3702         if ($chain =~ m/^PVEFW-\S+_swap$/) {
3703             $cmdlist .= "destroy $chain\n";
3704         }
3705     }
3706
3707     foreach my $chain (keys %$ruleset) {
3708         my $stat = $statushash->{$chain};
3709         die "internal error" if !$stat;
3710
3711         if ($stat->{action} eq 'create') {
3712             foreach my $cmd (@{$ruleset->{$chain}}) {
3713                 $cmdlist .= "$cmd\n";
3714             }
3715         }
3716     }
3717
3718     foreach my $chain (keys %$ruleset) {
3719         my $stat = $statushash->{$chain};
3720         die "internal error" if !$stat;
3721
3722         if ($stat->{action} eq 'update') {
3723             my $chain_swap = $chain."_swap";
3724
3725             foreach my $cmd (@{$ruleset->{$chain}}) {
3726                 $cmd =~ s/$chain/$chain_swap/;
3727                 $cmdlist .= "$cmd\n";
3728             }
3729             $cmdlist .= "swap $chain_swap $chain\n";
3730             $cmdlist .= "flush $chain_swap\n";
3731             $cmdlist .= "destroy $chain_swap\n";
3732         }
3733     }
3734
3735      # the remove unused chains
3736     foreach my $chain (keys %$statushash) {
3737         next if $statushash->{$chain}->{action} ne 'delete';
3738
3739         $delete_cmdlist .= "flush $chain\n";
3740         $delete_cmdlist .= "destroy $chain\n";
3741     }
3742
3743     my $changes = ($cmdlist || $delete_cmdlist) ? 1 : 0;
3744
3745     return ($cmdlist, $delete_cmdlist, $changes);
3746 }
3747
3748 sub apply_ruleset {
3749     my ($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6, $verbose) = @_;
3750
3751     enable_bridge_firewall();
3752
3753     my ($ipset_create_cmdlist, $ipset_delete_cmdlist, $ipset_changes) =
3754         get_ipset_cmdlist($ipset_ruleset, $verbose);
3755
3756     my ($cmdlist, $changes) = get_ruleset_cmdlist($ruleset, $verbose);
3757     my ($cmdlistv6, $changesv6) = get_ruleset_cmdlist($rulesetv6, $verbose, "ip6tables");
3758
3759     if ($verbose) {
3760         if ($ipset_changes) {
3761             print "ipset changes:\n";
3762             print $ipset_create_cmdlist if $ipset_create_cmdlist;
3763             print $ipset_delete_cmdlist if $ipset_delete_cmdlist;
3764         }
3765
3766         if ($changes) {
3767             print "iptables changes:\n";
3768             print $cmdlist;
3769         }
3770
3771         if ($changesv6) {
3772             print "ip6tables changes:\n";
3773             print $cmdlistv6;
3774         }
3775     }
3776
3777     my $tmpfile = "$pve_fw_status_dir/ipsetcmdlist1";
3778     PVE::Tools::file_set_contents($tmpfile, $ipset_create_cmdlist || '');
3779
3780     ipset_restore_cmdlist($ipset_create_cmdlist);
3781
3782     $tmpfile = "$pve_fw_status_dir/ip4cmdlist";
3783     PVE::Tools::file_set_contents($tmpfile, $cmdlist || '');
3784
3785     iptables_restore_cmdlist($cmdlist);
3786
3787     $tmpfile = "$pve_fw_status_dir/ip6cmdlist";
3788     PVE::Tools::file_set_contents($tmpfile, $cmdlistv6 || '');
3789
3790     ip6tables_restore_cmdlist($cmdlistv6);
3791
3792     $tmpfile = "$pve_fw_status_dir/ipsetcmdlist2";
3793     PVE::Tools::file_set_contents($tmpfile, $ipset_delete_cmdlist || '');
3794
3795     ipset_restore_cmdlist($ipset_delete_cmdlist) if $ipset_delete_cmdlist;
3796
3797     # test: re-read status and check if everything is up to date
3798     my $active_chains = iptables_get_chains();
3799     my $statushash = get_ruleset_status($ruleset, $active_chains, \&iptables_chain_digest, 0);
3800
3801     my $errors;
3802     foreach my $chain (sort keys %$ruleset) {
3803         my $stat = $statushash->{$chain};
3804         if ($stat->{action} ne 'exists') {
3805             warn "unable to update chain '$chain'\n";
3806             $errors = 1;
3807         }
3808     }
3809
3810     my $active_chainsv6 = iptables_get_chains("ip6tables");
3811     my $statushashv6 = get_ruleset_status($rulesetv6, $active_chainsv6, \&iptables_chain_digest, 0);
3812
3813     foreach my $chain (sort keys %$rulesetv6) {
3814         my $stat = $statushashv6->{$chain};
3815         if ($stat->{action} ne 'exists') {
3816             warn "unable to update chain '$chain'\n";
3817             $errors = 1;
3818         }
3819     }
3820
3821     die "unable to apply firewall changes\n" if $errors;
3822
3823     update_nf_conntrack_max($hostfw_conf);
3824
3825     update_nf_conntrack_tcp_timeout_established($hostfw_conf);
3826
3827 }
3828
3829 sub update_nf_conntrack_max {
3830     my ($hostfw_conf) = @_;
3831
3832     my $max = 65536; # reasonable default
3833
3834     my $options = $hostfw_conf->{options} || {};
3835
3836     if (defined($options->{nf_conntrack_max}) && ($options->{nf_conntrack_max} > $max)) {
3837         $max = $options->{nf_conntrack_max};
3838         $max = int(($max+ 8191)/8192)*8192; # round to multiples of 8192
3839     }
3840
3841     my $filename_nf_conntrack_max = "/proc/sys/net/nf_conntrack_max";
3842     my $filename_hashsize = "/sys/module/nf_conntrack/parameters/hashsize";
3843
3844     my $current = int(PVE::Tools::file_read_firstline($filename_nf_conntrack_max) || $max);
3845
3846     if ($current != $max) {
3847         my $hashsize = int($max/4);
3848         PVE::ProcFSTools::write_proc_entry($filename_hashsize, $hashsize);
3849         PVE::ProcFSTools::write_proc_entry($filename_nf_conntrack_max, $max);
3850     }
3851 }
3852
3853 sub update_nf_conntrack_tcp_timeout_established {
3854     my ($hostfw_conf) = @_;
3855
3856     my $options = $hostfw_conf->{options} || {};
3857
3858     my $value = defined($options->{nf_conntrack_tcp_timeout_established}) ? $options->{nf_conntrack_tcp_timeout_established} : 432000;
3859
3860     PVE::ProcFSTools::write_proc_entry("/proc/sys/net/netfilter/nf_conntrack_tcp_timeout_established", $value);
3861 }
3862
3863 sub remove_pvefw_chains {
3864
3865     PVE::Firewall::remove_pvefw_chains_iptables("iptables");
3866     PVE::Firewall::remove_pvefw_chains_iptables("ip6tables");
3867     PVE::Firewall::remove_pvefw_chains_ipset();
3868
3869 }
3870
3871 sub remove_pvefw_chains_iptables {
3872     my ($iptablescmd) = @_;
3873
3874     my ($chash, $hooks) = iptables_get_chains($iptablescmd);
3875     my $cmdlist = "*filter\n";
3876
3877     foreach my $h (qw(INPUT OUTPUT FORWARD)) {
3878         if ($hooks->{$h}) {
3879             $cmdlist .= "-D $h -j PVEFW-$h\n";
3880         }
3881     }
3882
3883     foreach my $chain (keys %$chash) {
3884         $cmdlist .= "-F $chain\n";
3885     }
3886
3887     foreach my $chain (keys %$chash) {
3888         $cmdlist .= "-X $chain\n";
3889     }
3890     $cmdlist .= "COMMIT\n";
3891
3892     if($iptablescmd eq "ip6tables") {
3893         ip6tables_restore_cmdlist($cmdlist);
3894     } else {
3895         iptables_restore_cmdlist($cmdlist);
3896     }
3897 }
3898
3899 sub remove_pvefw_chains_ipset {
3900
3901     my $ipset_chains = ipset_get_chains();
3902
3903     my $cmdlist = "";
3904
3905     foreach my $chain (keys %$ipset_chains) {
3906         $cmdlist .= "flush $chain\n";
3907         $cmdlist .= "destroy $chain\n";
3908     }
3909
3910     ipset_restore_cmdlist($cmdlist) if $cmdlist;
3911 }
3912
3913 sub init {
3914     my $cluster_conf = load_clusterfw_conf();
3915     my $cluster_options = $cluster_conf->{options};
3916     my $enable = $cluster_options->{enable};
3917
3918     return if !$enable;
3919
3920     # load required modules here
3921 }
3922
3923 sub update {
3924     my $code = sub {
3925
3926         my $cluster_conf = load_clusterfw_conf();
3927         my $cluster_options = $cluster_conf->{options};
3928
3929         if (!$cluster_options->{enable}) {
3930             PVE::Firewall::remove_pvefw_chains();
3931             return;
3932         }
3933
3934         my $hostfw_conf = load_hostfw_conf($cluster_conf);
3935
3936         my ($ruleset, $ipset_ruleset, $rulesetv6) = compile($cluster_conf, $hostfw_conf);
3937
3938         apply_ruleset($ruleset, $hostfw_conf, $ipset_ruleset, $rulesetv6);
3939     };
3940
3941     run_locked($code);
3942 }
3943
3944 1;