PVE/Firewall.pm

   1 package PVE::Firewall;
   2
   3 use warnings;
   4 use strict;
   5 use Data::Dumper;
   6 use PVE::Tools;
   7 use PVE::QemuServer;
   8 use File::Path;
   9 use IO::File;
  10 use Net::IP;
  11 use PVE::Tools qw(run_command);
  12
  13 use Data::Dumper;
  14
  15 my $macros;
  16 my @ruleset = ();
  17
  18 sub get_shorewall_macros {
  19
  20     return $macros if $macros;
  21
  22     foreach my $path (</usr/share/shorewall/macro.*>) {
  23         if ($path =~ m|/macro\.(\S+)$|) {
  24             $macros->{$1} = 1;
  25         }
  26     }
  27     return $macros;
  28 }
  29
  30 my $etc_services;
  31
  32 sub get_etc_services {
  33
  34     return $etc_services if $etc_services;
  35
  36     my $filename = "/etc/services";
  37
  38     my $fh = IO::File->new($filename, O_RDONLY);
  39     if (!$fh) {
  40         warn "unable to read '$filename' - $!\n";
  41         return {};
  42     }
  43
  44     my $services = {};
  45
  46     while (my $line = <$fh>) {
  47         chomp ($line);
  48         next if $line =~m/^#/;
  49         next if ($line =~m/^\s*$/);
  50
  51         if ($line =~ m!^(\S+)\s+(\S+)/(tcp|udp).*$!) {
  52             $services->{byid}->{$2}->{name} = $1;
  53             $services->{byid}->{$2}->{$3} = 1;
  54             $services->{byname}->{$1} = $services->{byid}->{$2};
  55         }
  56     }
  57
  58     close($fh);
  59
  60     $etc_services = $services;
  61
  62
  63     return $etc_services;
  64 }
  65
  66 my $etc_protocols;
  67
  68 sub get_etc_protocols {
  69     return $etc_protocols if $etc_protocols;
  70
  71     my $filename = "/etc/protocols";
  72
  73     my $fh = IO::File->new($filename, O_RDONLY);
  74     if (!$fh) {
  75         warn "unable to read '$filename' - $!\n";
  76         return {};
  77     }
  78
  79     my $protocols = {};
  80
  81     while (my $line = <$fh>) {
  82         chomp ($line);
  83         next if $line =~m/^#/;
  84         next if ($line =~m/^\s*$/);
  85
  86         if ($line =~ m!^(\S+)\s+(\d+)\s+.*$!) {
  87             $protocols->{byid}->{$2}->{name} = $1;
  88             $protocols->{byname}->{$1} = $protocols->{byid}->{$2};
  89         }
  90     }
  91
  92     close($fh);
  93
  94     $etc_protocols = $protocols;
  95
  96     return $etc_protocols;
  97 }
  98
  99 sub parse_address_list {
 100     my ($str) = @_;
 101
 102     my $nbaor = 0;
 103     foreach my $aor (split(/,/, $str)) {
 104         if (!Net::IP->new($aor)) {
 105             my $err = Net::IP::Error();
 106             die "invalid IP address: $err\n";
 107         }else{
 108             $nbaor++;
 109         }
 110     }
 111     return $nbaor;
 112 }
 113
 114 sub parse_port_name_number_or_range {
 115     my ($str) = @_;
 116
 117     my $services = PVE::Firewall::get_etc_services();
 118     my $nbports = 0;
 119     foreach my $item (split(/,/, $str)) {
 120         my $portlist = "";
 121         foreach my $pon (split(':', $item, 2)) {
 122             if ($pon =~ m/^\d+$/){
 123                 die "invalid port '$pon'\n" if $pon < 0 && $pon > 65536;
 124             }else{
 125                 die "invalid port $services->{byname}->{$pon}\n" if !$services->{byname}->{$pon};
 126             }
 127             $nbports++;
 128         }
 129     }
 130
 131     return ($nbports);
 132 }
 133
 134 my $rule_format = "%-15s %-30s %-30s %-15s %-15s %-15s\n";
 135
 136 sub iptables {
 137     my ($cmd) = @_;
 138
 139     run_command("/sbin/iptables $cmd", outfunc => sub {}, errfunc => sub {});
 140 }
 141
 142 sub iptables_restore {
 143
 144     unshift (@ruleset, '*filter');
 145     push (@ruleset, 'COMMIT');
 146
 147     my $cmdlist = join("\n", @ruleset);
 148
 149     run_command("echo '$cmdlist' | /sbin/iptables-restore -n", outfunc => sub {});
 150 }
 151
 152 sub iptables_addrule {
 153    my ($rule) = @_;
 154
 155    push (@ruleset, $rule);
 156 }
 157
 158 sub iptables_chain_exist {
 159     my ($chain) = @_;
 160
 161     eval{
 162         iptables("-n --list $chain");
 163     };
 164     return undef if $@;
 165
 166     return 1;
 167 }
 168
 169 sub iptables_rule_exist {
 170     my ($rule) = @_;
 171
 172     eval{
 173         iptables("-C $rule");
 174     };
 175     return undef if $@;
 176
 177     return 1;
 178 }
 179
 180 sub iptables_generate_rule {
 181     my ($chain, $rule) = @_;
 182
 183     my $cmd = "-A $chain";
 184
 185     $cmd .= " -m iprange --src-range" if $rule->{nbsource} && $rule->{nbsource} > 1;
 186     $cmd .= " -s $rule->{source}" if $rule->{source};
 187     $cmd .= " -m iprange --dst-range" if $rule->{nbdest} && $rule->{nbdest} > 1;
 188     $cmd .= " -d $rule->{dest}" if $rule->{destination};
 189     $cmd .= " -p $rule->{proto}" if $rule->{proto};
 190     $cmd .= "  --match multiport" if $rule->{nbdport} && $rule->{nbdport} > 1;
 191     $cmd .= " --dport $rule->{dport}" if $rule->{dport};
 192     $cmd .= "  --match multiport" if $rule->{nbsport} && $rule->{nbsport} > 1;
 193     $cmd .= " --sport $rule->{sport}" if $rule->{sport};
 194     $cmd .= " -j $rule->{action}" if $rule->{action};
 195
 196     iptables_addrule($cmd);
 197
 198 }
 199
 200 sub generate_bridge_rules {
 201     my ($bridge) = @_;
 202
 203     if(!iptables_chain_exist("BRIDGEFW-OUT")){
 204         iptables_addrule(":BRIDGEFW-OUT - [0:0]");
 205     }
 206
 207     if(!iptables_chain_exist("BRIDGEFW-IN")){
 208         iptables_addrule(":BRIDGEFW-IN - [0:0]");
 209     }
 210
 211     if(!iptables_chain_exist("proxmoxfw-FORWARD")){
 212         iptables_addrule(":proxmoxfw-FORWARD - [0:0]");
 213         iptables_addrule("-I FORWARD -j proxmoxfw-FORWARD");
 214         iptables_addrule("-A proxmoxfw-FORWARD -m state --state RELATED,ESTABLISHED -j ACCEPT");
 215         iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-in --physdev-is-bridged -j BRIDGEFW-OUT");
 216         iptables_addrule("-A proxmoxfw-FORWARD -m physdev --physdev-is-out --physdev-is-bridged -j BRIDGEFW-IN");
 217
 218     }
 219
 220     generate_proxmoxfwinput();
 221
 222     if(!iptables_chain_exist("$bridge-IN")){
 223         iptables_addrule(":$bridge-IN - [0:0]");
 224         iptables_addrule("-A proxmoxfw-FORWARD -i $bridge -j DROP");  #disable interbridge routing
 225         iptables_addrule("-A BRIDGEFW-IN -j $bridge-IN");
 226         iptables_addrule("-A $bridge-IN -j ACCEPT");
 227
 228     }
 229
 230     if(!iptables_chain_exist("$bridge-OUT")){
 231         iptables_addrule(":$bridge-OUT - [0:0]");
 232         iptables_addrule("-A proxmoxfw-FORWARD -o $bridge -j DROP"); # disable interbridge routing
 233         iptables_addrule("-A BRIDGEFW-OUT -j $bridge-OUT");
 234
 235     }
 236
 237 }
 238
 239
 240 sub generate_tap_rules_direction {
 241     my ($iface, $netid, $rules, $bridge, $direction) = @_;
 242
 243     my $tapchain = "$iface-$direction";
 244
 245     iptables_addrule(":$tapchain - [0:0]");
 246
 247     iptables_addrule("-A $tapchain -m state --state INVALID -j DROP");
 248     iptables_addrule("-A $tapchain -m state --state RELATED,ESTABLISHED -j ACCEPT");
 249
 250     if (scalar(@$rules)) {
 251         foreach my $rule (@$rules) {
 252             next if $rule->{iface} && $rule->{iface} ne $netid;
 253             if($rule->{action}  =~ m/^(GROUP-(\S+))$/){
 254                     $rule->{action} .= "-$direction";
 255                     #generate empty group rule if don't exist
 256                     if(!iptables_chain_exist($rule->{action})){
 257                         generate_group_rules($2);
 258                     }
 259             }
 260             #we go to vmbr-IN if accept in out rules
 261             $rule->{action} = "$bridge-IN" if $rule->{action} eq 'ACCEPT' && $direction eq 'OUT';
 262             iptables_generate_rule($tapchain, $rule);
 263         }
 264     }
 265
 266     iptables_addrule("-A $tapchain -j LOG --log-prefix \"$tapchain-dropped: \" --log-level 4");
 267     iptables_addrule("-A $tapchain -j DROP");
 268
 269     #plug the tap chain to bridge chain
 270     my $physdevdirection = $direction eq 'IN' ? "out":"in";
 271     my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
 272
 273     if(!iptables_rule_exist($rule)){
 274         iptables_addrule("-I $rule");
 275     }
 276
 277     if($direction eq 'OUT'){
 278         #add tap->host rules
 279         my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain";
 280
 281         if(!iptables_rule_exist($rule)){
 282             iptables_addrule("-A $rule");
 283         }
 284     }
 285 }
 286
 287 sub generate_tap_rules {
 288     my ($net, $netid, $vmid) = @_;
 289
 290     my $filename = "/etc/pve/firewall/$vmid.fw";
 291     my $fh = IO::File->new($filename, O_RDONLY);
 292     return if !$fh;
 293
 294     #generate bridge rules
 295     my $bridge = $net->{bridge};
 296     my $tag = $net->{tag};
 297     $bridge .= "v$tag" if $tag;
 298
 299     #generate tap chain
 300     my $rules = parse_fw_rules($filename, $fh);
 301
 302     my $inrules = $rules->{in};
 303     my $outrules = $rules->{out};
 304
 305     my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/;
 306
 307     generate_bridge_rules($bridge);
 308     generate_tap_rules_direction($iface, $netid, $inrules, $bridge, 'IN');
 309     generate_tap_rules_direction($iface, $netid, $outrules, $bridge, 'OUT');
 310     iptables_restore();
 311 }
 312
 313 sub flush_tap_rules {
 314     my ($net, $netid, $vmid) = @_;
 315
 316     my $bridge = $net->{bridge};
 317     my $iface = "tap".$vmid."i".$1 if $netid =~ m/net(\d+)/;
 318
 319     flush_tap_rules_direction($iface, $bridge, 'IN');
 320     flush_tap_rules_direction($iface, $bridge, 'OUT');
 321     iptables_restore();
 322 }
 323
 324 sub flush_tap_rules_direction {
 325     my ($iface, $bridge, $direction) = @_;
 326
 327     my $tapchain = "$iface-$direction";
 328
 329     if(iptables_chain_exist($tapchain)){
 330         iptables_addrule("-F $tapchain");
 331
 332         my $physdevdirection = $direction eq 'IN' ? "out":"in";
 333         my $rule = "$bridge-$direction -m physdev --physdev-$physdevdirection $iface --physdev-is-bridged -j $tapchain";
 334         if(iptables_rule_exist($rule)){
 335             iptables_addrule("-D $rule");
 336         }
 337
 338         if($direction eq 'OUT'){
 339             my $rule = "proxmoxfw-INPUT -m physdev --physdev-$physdevdirection $iface -j $tapchain";
 340             if(iptables_rule_exist($rule)){
 341                 iptables_addrule("-D $rule");
 342             }
 343         }
 344
 345         iptables_addrule("-X $tapchain");
 346     }
 347 }
 348
 349 sub enablehostfw {
 350
 351     generate_proxmoxfwinput();
 352     generate_proxmoxfwoutput();
 353
 354     my $filename = "/etc/pve/local/host.fw";
 355     my $fh = IO::File->new($filename, O_RDONLY);
 356     return if !$fh;
 357
 358     my $rules = parse_fw_rules($filename, $fh);
 359     my $inrules = $rules->{in};
 360     my $outrules = $rules->{out};
 361
 362     #host inbound firewall
 363     iptables_addrule(":host-IN - [0:0]");
 364     iptables_addrule("-A host-IN -m state --state INVALID -j DROP");
 365     iptables_addrule("-A host-IN -m state --state RELATED,ESTABLISHED -j ACCEPT");
 366     iptables_addrule("-A host-IN -i lo -j ACCEPT");
 367     iptables_addrule("-A host-IN -m addrtype --dst-type MULTICAST -j ACCEPT");
 368     iptables_addrule("-A host-IN -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
 369     iptables_addrule("-A host-IN -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 370
 371     if (scalar(@$inrules)) {
 372         foreach my $rule (@$inrules) {
 373             #we use RETURN because we need to check also tap rules
 374             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 375             iptables_generate_rule('host-IN', $rule);
 376         }
 377     }
 378
 379     iptables_addrule("-A host-IN -j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
 380     iptables_addrule("-A host-IN -j DROP");
 381
 382     #host outbound firewall
 383     iptables_addrule(":host-OUT - [0:0]");
 384     iptables_addrule("-A host-OUT -m state --state INVALID -j DROP");
 385     iptables_addrule("-A host-OUT -m state --state RELATED,ESTABLISHED -j ACCEPT");
 386     iptables_addrule("-A host-OUT -o lo -j ACCEPT");
 387     iptables_addrule("-A host-OUT -m addrtype --dst-type MULTICAST -j ACCEPT");
 388     iptables_addrule("-A host-OUT -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
 389     iptables_addrule("-A host-OUT -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 390
 391     if (scalar(@$outrules)) {
 392         foreach my $rule (@$outrules) {
 393             #we use RETURN because we need to check also tap rules
 394             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 395             iptables_generate_rule('host-OUT', $rule);
 396         }
 397     }
 398
 399     iptables_addrule("-A host-OUT -j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
 400     iptables_addrule("-A host-OUT -j DROP");
 401
 402
 403     my $rule = "proxmoxfw-INPUT -j host-IN";
 404     if(!iptables_rule_exist($rule)){
 405         iptables_addrule("-I $rule");
 406     }
 407
 408     $rule = "proxmoxfw-OUTPUT -j host-OUT";
 409     if(!iptables_rule_exist($rule)){
 410         iptables_addrule("-I $rule");
 411     }
 412
 413     iptables_restore();
 414
 415
 416 }
 417
 418 sub disablehostfw {
 419
 420     my $chain = "host-IN";
 421
 422     my $rule = "proxmoxfw-INPUT -j $chain";
 423     if(iptables_rule_exist($rule)){
 424         iptables_addrule("-D $rule");
 425     }
 426
 427     if(iptables_chain_exist($chain)){
 428         iptables_addrule("-F $chain");
 429         iptables_addrule("-X $chain");
 430     }
 431
 432     $chain = "host-OUT";
 433
 434     $rule = "proxmoxfw-OUTPUT -j $chain";
 435     if(iptables_rule_exist($rule)){
 436         iptables_addrule("-D $rule");
 437     }
 438
 439     if(iptables_chain_exist($chain)){
 440         iptables_addrule("-F $chain");
 441         iptables_addrule("-X $chain");
 442     }
 443
 444     iptables_restore();
 445 }
 446
 447 sub generate_proxmoxfwinput {
 448
 449     if(!iptables_chain_exist("proxmoxfw-INPUT")){
 450         iptables_addrule(":proxmoxfw-INPUT - [0:0]");
 451         iptables_addrule("-I INPUT -j proxmoxfw-INPUT");
 452         iptables_addrule("-A INPUT -j ACCEPT");
 453     }
 454 }
 455
 456 sub generate_proxmoxfwoutput {
 457
 458     if(!iptables_chain_exist("proxmoxfw-OUTPUT")){
 459         iptables_addrule(":proxmoxfw-OUTPUT - [0:0]");
 460         iptables_addrule("-I OUTPUT -j proxmoxfw-OUTPUT");
 461         iptables_addrule("-A OUTPUT -j ACCEPT");
 462     }
 463
 464 }
 465
 466
 467 my $generate_input_rule = sub {
 468     my ($zoneinfo, $rule, $net, $netid) = @_;
 469
 470     my $zone = $net->{zone} || die "internal error";
 471     my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
 472     my $tap = $net->{tap} || die "internal error";
 473
 474     my $dest = "$zid:$tap";
 475
 476     if ($rule->{dest}) {
 477         $dest .= ":$rule->{dest}";
 478     }
 479
 480     my $action = $rule->{service} ?
 481         "$rule->{service}($rule->{action})" : $rule->{action};
 482
 483     my $sources = [];
 484
 485     if (!$rule->{source}) {
 486         push @$sources, 'all';
 487     } elsif ($zoneinfo->{$zone}->{type} eq 'bport') {
 488         my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error";
 489         my $zoneref = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
 490
 491         # using 'all' does not work, so we create one rule for
 492         # each related zone on the same bridge
 493         push @$sources, "${zoneref}:$rule->{source}";
 494         foreach my $z (keys %$zoneinfo) {
 495             next if $z eq $zone;
 496             next if !$zoneinfo->{$z}->{bridge_zone};
 497             next if $zoneinfo->{$z}->{bridge_zone} ne $bridge_zone;
 498             $zoneref = $zoneinfo->{$z}->{zoneref} || die "internal error";
 499             push @$sources, "${zoneref}:$rule->{source}";
 500         }
 501     } else {
 502         push @$sources, "all:$rule->{source}";
 503     }
 504
 505     my $out = '';
 506
 507     foreach my $source (@$sources) {
 508         $out .= sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-',
 509                         $rule->{dport} || '-', $rule->{sport} || '-');
 510     }
 511
 512     return $out;
 513 };
 514
 515 my $generate_output_rule = sub {
 516     my ($zoneinfo, $rule, $net, $netid) = @_;
 517
 518     my $zone = $net->{zone} || die "internal error";
 519     my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
 520     my $tap = $net->{tap} || die "internal error";
 521
 522     my $action = $rule->{service} ?
 523         "$rule->{service}($rule->{action})" : $rule->{action};
 524
 525     my $dest;
 526
 527     if (!$rule->{dest}) {
 528         $dest = 'all';
 529     } else {
 530         $dest = "all:$rule->{dest}";
 531     }
 532
 533     return sprintf($rule_format, $action, "$zid:$tap", $dest,
 534                    $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
 535 };
 536
 537 # we need complete VM configuration of all VMs (openvz/qemu)
 538 # in vmdata
 539
 540 my $compile_shorewall = sub {
 541     my ($targetdir, $vmdata, $rules) = @_;
 542
 543     # remove existing data ?
 544     foreach my $file (qw(params zones rules interfaces  maclist  policy)) {
 545         unlink "$targetdir/$file";
 546     }
 547
 548     my $netinfo;
 549
 550     my $zoneinfo = {
 551         fw => { type => 'firewall' },
 552     };
 553
 554     my $maclist = {};
 555
 556     my $register_bridge;
 557
 558     $register_bridge = sub {
 559         my ($bridge, $vlan) = @_;
 560
 561         my $zone =  $bridge;
 562
 563         return $zone if $zoneinfo->{$zone};
 564
 565         my $ext_zone = "${bridge}_ext";
 566
 567         $zoneinfo->{$zone} = {
 568             type => 'bridge',
 569             bridge => $bridge,
 570             bridge_ext_zone => $ext_zone,
 571         };
 572
 573         # physical input devices
 574         my $dir = "/sys/class/net/$bridge/brif";
 575         my $physical = {};
 576         PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub {
 577             my ($slave) = @_;
 578             $physical->{$slave} = 1;
 579         });
 580
 581         $zoneinfo->{$ext_zone} = {
 582             type => 'bport',
 583             bridge_zone => $zone,
 584             ifaces => $physical,
 585         };
 586
 587         return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
 588
 589         return $zone;
 590     };
 591
 592     my $register_bridge_port = sub {
 593         my ($bridge, $vlan, $vmzone, $tap) = @_;
 594
 595         my $bridge_zone = &$register_bridge($bridge, $vlan);
 596         my $zone = $bridge_zone . '_' . $vmzone;
 597
 598         if (!$zoneinfo->{$zone}) {
 599             $zoneinfo->{$zone} = {
 600                 type => 'bport',
 601                 bridge_zone => $bridge_zone,
 602                 ifaces => {},
 603             };
 604         }
 605
 606         $zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
 607
 608         return $zone;
 609     };
 610
 611     foreach my $vmid (keys %{$vmdata->{qemu}}) {
 612         $netinfo->{$vmid} = {};
 613         my $conf = $vmdata->{qemu}->{$vmid};
 614         foreach my $opt (keys %$conf) {
 615             next if $opt !~ m/^net(\d+)$/;
 616             my $netnum = $1;
 617             my $net = PVE::QemuServer::parse_net($conf->{$opt});
 618             next if !$net;
 619             die "implement me" if !$net->{bridge};
 620
 621             my $vmzone = $conf->{zone} || "vm$vmid";
 622             $net->{tap} = "tap${vmid}i${netnum}";
 623             $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error";
 624             $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
 625             $netinfo->{$vmid}->{$opt} = $net;
 626         }
 627     }
 628
 629     #print Dumper($netinfo);
 630
 631     # NOTE: zone names have length limit, so we need to
 632     # translate them into shorter names
 633
 634     my $zoneid = 0;
 635     my $zonemap = { fw => 'fw' };
 636
 637     my $lookup_zonename = sub {
 638         my ($zone) = @_;
 639
 640         return $zonemap->{$zone} if defined($zonemap->{$zone});
 641         $zonemap->{$zone} = 'z' . $zoneid++;
 642
 643         return $zonemap->{$zone};
 644     };
 645
 646     foreach my $z (sort keys %$zoneinfo) {
 647         $zoneinfo->{$z}->{id} = &$lookup_zonename($z);
 648         $zoneinfo->{$z}->{zonevar} = uc($z);
 649         $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar};
 650     }
 651
 652     my $out;
 653
 654     # dump params file
 655     $out = "# PVE zones\n";
 656     foreach my $z (sort keys %$zoneinfo) {
 657         $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n";
 658     }
 659     PVE::Tools::file_set_contents("$targetdir/params", $out);
 660
 661     # dump zone file
 662
 663     my $format = "%-30s %-10s %-15s\n";
 664     $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS');
 665
 666     foreach my $z (sort keys %$zoneinfo) {
 667         my $zid = $zoneinfo->{$z}->{zoneref};
 668         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 669             $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '');
 670         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 671             $out .= sprintf($format, $zid, 'ipv4', '');
 672         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 673             my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 674             my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
 675             $out .= sprintf($format, "$zid:$bzid", 'bport', '');
 676         } else {
 677             die "internal error";
 678         }
 679     }
 680
 681     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 682
 683     PVE::Tools::file_set_contents("$targetdir/zones", $out);
 684
 685     # dump interfaces
 686
 687     $format = "%-25s %-20s %-10s %-15s\n";
 688     $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS');
 689
 690     my $maclist_format = "%-15s %-15s %-15s\n";
 691     my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');
 692
 693     foreach my $z (sort keys %$zoneinfo) {
 694         my $zid = $zoneinfo->{$z}->{zoneref};
 695         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 696             # do nothing;
 697         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 698             my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
 699             $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional');
 700         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 701             my $ifaces = $zoneinfo->{$z}->{ifaces};
 702             foreach my $iface (sort keys %$ifaces) {
 703                 my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 704                 my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
 705                 my $iftxt = "$bridge:$iface";
 706
 707                 if ($maclist->{$iface}) {
 708                     $out .= sprintf($format, $zid, $iftxt, '-', 'maclist');
 709                     $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
 710                 } else {
 711                     $out .= sprintf($format, $zid, $iftxt, '-', '');
 712                 }
 713             }
 714         } else {
 715             die "internal error";
 716         }
 717     }
 718
 719     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 720
 721     PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
 722
 723     # dump maclist
 724     PVE::Tools::file_set_contents("$targetdir/maclist", $macs);
 725
 726     # dump policy
 727
 728     $format = "%-15s %-15s %-15s %s\n";
 729     $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
 730     $out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');
 731
 732     # we need to disable intra-zone traffic on bridges. Else traffic
 733     # from untracked interfaces simply pass the firewall
 734     foreach my $z (sort keys %$zoneinfo) {
 735         my $zid = $zoneinfo->{$z}->{zoneref};
 736         if ($zoneinfo->{$z}->{type} eq 'bridge') {
 737             $out .= sprintf($format, $zid, $zid, 'REJECT', 'info');
 738         }
 739     }
 740     $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
 741
 742     PVE::Tools::file_set_contents("$targetdir/policy", $out);
 743
 744     # dump rules
 745     $out = '';
 746
 747     $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
 748     foreach my $vmid (sort keys %$rules) {
 749         my $inrules = $rules->{$vmid}->{in};
 750         my $outrules = $rules->{$vmid}->{out};
 751
 752         if (scalar(@$inrules)) {
 753             $out .= "# IN to VM $vmid\n";
 754             foreach my $rule (@$inrules) {
 755                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 756                     my $net = $netinfo->{$vmid}->{$netid};
 757                     next if $rule->{iface} && $rule->{iface} ne $netid;
 758                     $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
 759                 }
 760             }
 761         }
 762
 763         if (scalar(@$outrules)) {
 764             $out .= "# OUT from VM $vmid\n";
 765             foreach my $rule (@$outrules) {
 766                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 767                     my $net = $netinfo->{$vmid}->{$netid};
 768                     next if $rule->{iface} && $rule->{iface} ne $netid;
 769                     $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
 770                 }
 771             }
 772         }
 773     }
 774
 775     PVE::Tools::file_set_contents("$targetdir/rules", $out);
 776 };
 777
 778
 779 sub parse_fw_rules {
 780     my ($filename, $fh) = @_;
 781
 782     my $section;
 783
 784     my $res = { in => [], out => [] };
 785
 786     my $macros = get_shorewall_macros();
 787     my $protocols = get_etc_protocols();
 788
 789     while (defined(my $line = <$fh>)) {
 790         next if $line =~ m/^#/;
 791         next if $line =~ m/^\s*$/;
 792
 793         if ($line =~ m/^\[(in|out)\]\s*$/i) {
 794             $section = lc($1);
 795             next;
 796         }
 797         next if !$section;
 798
 799         my ($action, $iface, $source, $dest, $proto, $dport, $sport) =
 800             split(/\s+/, $line);
 801
 802         if (!$action) {
 803             warn "skip incomplete line\n";
 804             next;
 805         }
 806
 807         my $service;
 808         if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) {
 809             # OK
 810         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
 811             ($service, $action) = ($1, $2);
 812             if (!$macros->{$service}) {
 813                 warn "unknown service '$service'\n";
 814                 next;
 815             }
 816         } else {
 817             warn "unknown action '$action'\n";
 818             next;
 819         }
 820
 821         $iface = undef if $iface && $iface eq '-';
 822         if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) {
 823             warn "unknown interface '$iface'\n";
 824             next;
 825         }
 826
 827         $proto = undef if $proto && $proto eq '-';
 828         if ($proto && !(defined($protocols->{byname}->{$proto}) ||
 829                         defined($protocols->{byid}->{$proto}))) {
 830             warn "unknown protokol '$proto'\n";
 831             next;
 832         }
 833
 834         $source = undef if $source && $source eq '-';
 835         $dest = undef if $dest && $dest eq '-';
 836
 837         $dport = undef if $dport && $dport eq '-';
 838         $sport = undef if $sport && $sport eq '-';
 839         my $nbdport = undef;
 840         my $nbsport = undef;
 841         my $nbsource = undef;
 842         my $nbdest = undef;
 843
 844         eval {
 845             $nbsource = parse_address_list($source) if $source;
 846             $nbdest = parse_address_list($dest) if $dest;
 847             $nbdport = parse_port_name_number_or_range($dport) if $dport;
 848             $nbsport = parse_port_name_number_or_range($sport) if $sport;
 849         };
 850         if (my $err = $@) {
 851             warn $err;
 852             next;
 853
 854         }
 855
 856
 857         my $rule = {
 858             action => $action,
 859             service => $service,
 860             iface => $iface,
 861             source => $source,
 862             dest => $dest,
 863             nbsource => $nbsource,
 864             nbdest => $nbdest,
 865             proto => $proto,
 866             dport => $dport,
 867             sport => $sport,
 868             nbdport => $nbdport,
 869             nbsport => $nbsport,
 870
 871         };
 872
 873         push @{$res->{$section}}, $rule;
 874     }
 875
 876     return $res;
 877 }
 878
 879 sub read_local_vm_config {
 880
 881     my $openvz = {};
 882
 883     my $qemu = {};
 884
 885     my $list = PVE::QemuServer::config_list();
 886
 887     foreach my $vmid (keys %$list) {
 888         #next if !($vmid eq '100' || $vmid eq '102');
 889         my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
 890         if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
 891             $qemu->{$vmid} = $conf;
 892         }
 893     }
 894
 895     my $vmdata = { openvz => $openvz, qemu => $qemu };
 896
 897     return $vmdata;
 898 };
 899
 900 sub read_vm_firewall_rules {
 901     my ($vmdata) = @_;
 902     my $rules = {};
 903     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
 904         my $filename = "/etc/pve/firewall/$vmid.fw";
 905         my $fh = IO::File->new($filename, O_RDONLY);
 906         next if !$fh;
 907
 908         $rules->{$vmid} = parse_fw_rules($filename, $fh);
 909     }
 910
 911     return $rules;
 912 }
 913
 914 sub compile {
 915
 916     my $vmdata = read_local_vm_config();
 917     my $rules = read_vm_firewall_rules($vmdata);
 918
 919     # print Dumper($vmdata);
 920
 921     my $swdir = '/etc/shorewall';
 922     mkdir $swdir;
 923
 924     &$compile_shorewall($swdir, $vmdata, $rules);
 925
 926     PVE::Tools::run_command(['shorewall', 'compile']);
 927 }
 928
 929 sub compile_and_start {
 930     my ($restart) = @_;
 931
 932     compile();
 933
 934     PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
 935 }
 936
 937
 938 1;