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 $tapchain";
 340
 341             if(!iptables_rule_exist($rule)){
 342                 iptables_addrule("-D $rule");
 343             }
 344         }
 345
 346         iptables_addrule("-X $tapchain");
 347     }
 348 }
 349
 350 sub enablehostfw {
 351
 352     generate_proxmoxfwinput();
 353     generate_proxmoxfwoutput();
 354
 355     my $filename = "/etc/pve/local/host.fw";
 356     my $fh = IO::File->new($filename, O_RDONLY);
 357     return if !$fh;
 358
 359     my $rules = parse_fw_rules($filename, $fh);
 360     my $inrules = $rules->{in};
 361     my $outrules = $rules->{out};
 362
 363     #host inbound firewall
 364     iptables_addrule(":host-IN - [0:0]");
 365     iptables_addrule("-A host-IN -m state --state INVALID -j DROP");
 366     iptables_addrule("-A host-IN -m state --state RELATED,ESTABLISHED -j ACCEPT");
 367     iptables_addrule("-A host-IN -i lo -j ACCEPT");
 368     iptables_addrule("-A host-IN -m addrtype --dst-type MULTICAST -j ACCEPT");
 369     iptables_addrule("-A host-IN -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
 370     iptables_addrule("-A host-IN -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 371
 372     if (scalar(@$inrules)) {
 373         foreach my $rule (@$inrules) {
 374             #we use RETURN because we need to check also tap rules
 375             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 376             iptables_generate_rule('host-IN', $rule);
 377         }
 378     }
 379
 380     iptables_addrule("-A host-IN -j LOG --log-prefix \"kvmhost-IN dropped: \" --log-level 4");
 381     iptables_addrule("-A host-IN -j DROP");
 382
 383     #host outbound firewall
 384     iptables_addrule(":host-OUT - [0:0]");
 385     iptables_addrule("-A host-OUT -m state --state INVALID -j DROP");
 386     iptables_addrule("-A host-OUT -m state --state RELATED,ESTABLISHED -j ACCEPT");
 387     iptables_addrule("-A host-OUT -o lo -j ACCEPT");
 388     iptables_addrule("-A host-OUT -m addrtype --dst-type MULTICAST -j ACCEPT");
 389     iptables_addrule("-A host-OUT -p udp -m state --state NEW -m multiport --dports 5404,5405 -j ACCEPT");
 390     iptables_addrule("-A host-OUT -p udp -m udp --dport 9000 -j ACCEPT"); #corosync
 391
 392     if (scalar(@$outrules)) {
 393         foreach my $rule (@$outrules) {
 394             #we use RETURN because we need to check also tap rules
 395             $rule->{action} = 'RETURN' if $rule->{action} eq 'ACCEPT';
 396             iptables_generate_rule('host-OUT', $rule);
 397         }
 398     }
 399
 400     iptables_addrule("-A host-OUT -j LOG --log-prefix \"kvmhost-OUT dropped: \" --log-level 4");
 401     iptables_addrule("-A host-OUT -j DROP");
 402
 403
 404     my $rule = "proxmoxfw-INPUT -j host-IN";
 405     if(!iptables_rule_exist($rule)){
 406         iptables_addrule("-I $rule");
 407     }
 408
 409     $rule = "proxmoxfw-OUTPUT -j host-OUT";
 410     if(!iptables_rule_exist($rule)){
 411         iptables_addrule("-I $rule");
 412     }
 413
 414     iptables_restore();
 415
 416
 417 }
 418
 419 sub disablehostfw {
 420
 421     my $chain = "host-IN";
 422
 423     my $rule = "proxmoxfw-INPUT -j $chain";
 424     if(iptables_rule_exist($rule)){
 425         iptables_addrule("-D $rule");
 426     }
 427
 428     if(iptables_chain_exist($chain)){
 429         iptables_addrule("-F $chain");
 430         iptables_addrule("-X $chain");
 431     }
 432
 433     $chain = "host-OUT";
 434
 435     $rule = "proxmoxfw-OUTPUT -j $chain";
 436     if(iptables_rule_exist($rule)){
 437         iptables_addrule("-D $rule");
 438     }
 439
 440     if(iptables_chain_exist($chain)){
 441         iptables_addrule("-F $chain");
 442         iptables_addrule("-X $chain");
 443     }
 444
 445     iptables_restore();
 446 }
 447
 448 sub generate_proxmoxfwinput {
 449
 450     if(!iptables_chain_exist("proxmoxfw-INPUT")){
 451         iptables_addrule(":proxmoxfw-INPUT - [0:0]");
 452         iptables_addrule("-I INPUT -j proxmoxfw-INPUT");
 453         iptables_addrule("-A INPUT -j ACCEPT");
 454     }
 455 }
 456
 457 sub generate_proxmoxfwoutput {
 458
 459     if(!iptables_chain_exist("proxmoxfw-OUTPUT")){
 460         iptables_addrule(":proxmoxfw-OUTPUT - [0:0]");
 461         iptables_addrule("-I OUTPUT -j proxmoxfw-OUTPUT");
 462         iptables_addrule("-A OUTPUT -j ACCEPT");
 463     }
 464
 465 }
 466
 467
 468 my $generate_input_rule = sub {
 469     my ($zoneinfo, $rule, $net, $netid) = @_;
 470
 471     my $zone = $net->{zone} || die "internal error";
 472     my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
 473     my $tap = $net->{tap} || die "internal error";
 474
 475     my $dest = "$zid:$tap";
 476
 477     if ($rule->{dest}) {
 478         $dest .= ":$rule->{dest}";
 479     }
 480
 481     my $action = $rule->{service} ?
 482         "$rule->{service}($rule->{action})" : $rule->{action};
 483
 484     my $sources = [];
 485
 486     if (!$rule->{source}) {
 487         push @$sources, 'all';
 488     } elsif ($zoneinfo->{$zone}->{type} eq 'bport') {
 489         my $bridge_zone = $zoneinfo->{$zone}->{bridge_zone} || die "internal error";
 490         my $zoneref = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
 491
 492         # using 'all' does not work, so we create one rule for
 493         # each related zone on the same bridge
 494         push @$sources, "${zoneref}:$rule->{source}";
 495         foreach my $z (keys %$zoneinfo) {
 496             next if $z eq $zone;
 497             next if !$zoneinfo->{$z}->{bridge_zone};
 498             next if $zoneinfo->{$z}->{bridge_zone} ne $bridge_zone;
 499             $zoneref = $zoneinfo->{$z}->{zoneref} || die "internal error";
 500             push @$sources, "${zoneref}:$rule->{source}";
 501         }
 502     } else {
 503         push @$sources, "all:$rule->{source}";
 504     }
 505
 506     my $out = '';
 507
 508     foreach my $source (@$sources) {
 509         $out .= sprintf($rule_format, $action, $source, $dest, $rule->{proto} || '-',
 510                         $rule->{dport} || '-', $rule->{sport} || '-');
 511     }
 512
 513     return $out;
 514 };
 515
 516 my $generate_output_rule = sub {
 517     my ($zoneinfo, $rule, $net, $netid) = @_;
 518
 519     my $zone = $net->{zone} || die "internal error";
 520     my $zid = $zoneinfo->{$zone}->{zoneref} || die "internal error";
 521     my $tap = $net->{tap} || die "internal error";
 522
 523     my $action = $rule->{service} ?
 524         "$rule->{service}($rule->{action})" : $rule->{action};
 525
 526     my $dest;
 527
 528     if (!$rule->{dest}) {
 529         $dest = 'all';
 530     } else {
 531         $dest = "all:$rule->{dest}";
 532     }
 533
 534     return sprintf($rule_format, $action, "$zid:$tap", $dest,
 535                    $rule->{proto} || '-', $rule->{dport} || '-', $rule->{sport} || '-');
 536 };
 537
 538 # we need complete VM configuration of all VMs (openvz/qemu)
 539 # in vmdata
 540
 541 my $compile_shorewall = sub {
 542     my ($targetdir, $vmdata, $rules) = @_;
 543
 544     # remove existing data ?
 545     foreach my $file (qw(params zones rules interfaces  maclist  policy)) {
 546         unlink "$targetdir/$file";
 547     }
 548
 549     my $netinfo;
 550
 551     my $zoneinfo = {
 552         fw => { type => 'firewall' },
 553     };
 554
 555     my $maclist = {};
 556
 557     my $register_bridge;
 558
 559     $register_bridge = sub {
 560         my ($bridge, $vlan) = @_;
 561
 562         my $zone =  $bridge;
 563
 564         return $zone if $zoneinfo->{$zone};
 565
 566         my $ext_zone = "${bridge}_ext";
 567
 568         $zoneinfo->{$zone} = {
 569             type => 'bridge',
 570             bridge => $bridge,
 571             bridge_ext_zone => $ext_zone,
 572         };
 573
 574         # physical input devices
 575         my $dir = "/sys/class/net/$bridge/brif";
 576         my $physical = {};
 577         PVE::Tools::dir_glob_foreach($dir, '((eth|bond).+)', sub {
 578             my ($slave) = @_;
 579             $physical->{$slave} = 1;
 580         });
 581
 582         $zoneinfo->{$ext_zone} = {
 583             type => 'bport',
 584             bridge_zone => $zone,
 585             ifaces => $physical,
 586         };
 587
 588         return &$register_bridge("${bridge}v${vlan}") if defined($vlan);
 589
 590         return $zone;
 591     };
 592
 593     my $register_bridge_port = sub {
 594         my ($bridge, $vlan, $vmzone, $tap) = @_;
 595
 596         my $bridge_zone = &$register_bridge($bridge, $vlan);
 597         my $zone = $bridge_zone . '_' . $vmzone;
 598
 599         if (!$zoneinfo->{$zone}) {
 600             $zoneinfo->{$zone} = {
 601                 type => 'bport',
 602                 bridge_zone => $bridge_zone,
 603                 ifaces => {},
 604             };
 605         }
 606
 607         $zoneinfo->{$zone}->{ifaces}->{$tap} = 1;
 608
 609         return $zone;
 610     };
 611
 612     foreach my $vmid (keys %{$vmdata->{qemu}}) {
 613         $netinfo->{$vmid} = {};
 614         my $conf = $vmdata->{qemu}->{$vmid};
 615         foreach my $opt (keys %$conf) {
 616             next if $opt !~ m/^net(\d+)$/;
 617             my $netnum = $1;
 618             my $net = PVE::QemuServer::parse_net($conf->{$opt});
 619             next if !$net;
 620             die "implement me" if !$net->{bridge};
 621
 622             my $vmzone = $conf->{zone} || "vm$vmid";
 623             $net->{tap} = "tap${vmid}i${netnum}";
 624             $maclist->{$net->{tap}} = $net->{macaddr} || die "internal error";
 625             $net->{zone} = &$register_bridge_port($net->{bridge}, $net->{tag}, $vmzone, $net->{tap});
 626             $netinfo->{$vmid}->{$opt} = $net;
 627         }
 628     }
 629
 630     #print Dumper($netinfo);
 631
 632     # NOTE: zone names have length limit, so we need to
 633     # translate them into shorter names
 634
 635     my $zoneid = 0;
 636     my $zonemap = { fw => 'fw' };
 637
 638     my $lookup_zonename = sub {
 639         my ($zone) = @_;
 640
 641         return $zonemap->{$zone} if defined($zonemap->{$zone});
 642         $zonemap->{$zone} = 'z' . $zoneid++;
 643
 644         return $zonemap->{$zone};
 645     };
 646
 647     foreach my $z (sort keys %$zoneinfo) {
 648         $zoneinfo->{$z}->{id} = &$lookup_zonename($z);
 649         $zoneinfo->{$z}->{zonevar} = uc($z);
 650         $zoneinfo->{$z}->{zoneref} = '$' . $zoneinfo->{$z}->{zonevar};
 651     }
 652
 653     my $out;
 654
 655     # dump params file
 656     $out = "# PVE zones\n";
 657     foreach my $z (sort keys %$zoneinfo) {
 658         $out .= "$zoneinfo->{$z}->{zonevar}=$zoneinfo->{$z}->{id}\n";
 659     }
 660     PVE::Tools::file_set_contents("$targetdir/params", $out);
 661
 662     # dump zone file
 663
 664     my $format = "%-30s %-10s %-15s\n";
 665     $out = sprintf($format, '#ZONE', 'TYPE', 'OPTIONS');
 666
 667     foreach my $z (sort keys %$zoneinfo) {
 668         my $zid = $zoneinfo->{$z}->{zoneref};
 669         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 670             $out .= sprintf($format, $zid, $zoneinfo->{$z}->{type}, '');
 671         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 672             $out .= sprintf($format, $zid, 'ipv4', '');
 673         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 674             my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 675             my $bzid = $zoneinfo->{$bridge_zone}->{zoneref} || die "internal error";
 676             $out .= sprintf($format, "$zid:$bzid", 'bport', '');
 677         } else {
 678             die "internal error";
 679         }
 680     }
 681
 682     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 683
 684     PVE::Tools::file_set_contents("$targetdir/zones", $out);
 685
 686     # dump interfaces
 687
 688     $format = "%-25s %-20s %-10s %-15s\n";
 689     $out = sprintf($format, '#ZONE', 'INTERFACE', 'BROADCAST', 'OPTIONS');
 690
 691     my $maclist_format = "%-15s %-15s %-15s\n";
 692     my $macs = sprintf($maclist_format, '#DISPOSITION', 'INTERFACE', 'MACZONE');
 693
 694     foreach my $z (sort keys %$zoneinfo) {
 695         my $zid = $zoneinfo->{$z}->{zoneref};
 696         if ($zoneinfo->{$z}->{type} eq 'firewall') {
 697             # do nothing;
 698         } elsif ($zoneinfo->{$z}->{type} eq 'bridge') {
 699             my $bridge = $zoneinfo->{$z}->{bridge} || die "internal error";
 700             $out .= sprintf($format, $zid, $bridge, 'detect', 'bridge,optional');
 701         } elsif ($zoneinfo->{$z}->{type} eq 'bport') {
 702             my $ifaces = $zoneinfo->{$z}->{ifaces};
 703             foreach my $iface (sort keys %$ifaces) {
 704                 my $bridge_zone = $zoneinfo->{$z}->{bridge_zone} || die "internal error";
 705                 my $bridge = $zoneinfo->{$bridge_zone}->{bridge} || die "internal error";
 706                 my $iftxt = "$bridge:$iface";
 707
 708                 if ($maclist->{$iface}) {
 709                     $out .= sprintf($format, $zid, $iftxt, '-', 'maclist');
 710                     $macs .= sprintf($maclist_format, 'ACCEPT', $iface, $maclist->{$iface});
 711                 } else {
 712                     $out .= sprintf($format, $zid, $iftxt, '-', '');
 713                 }
 714             }
 715         } else {
 716             die "internal error";
 717         }
 718     }
 719
 720     $out .= sprintf("#LAST LINE - ADD YOUR ENTRIES ABOVE THIS ONE - DO NOT REMOVE\n");
 721
 722     PVE::Tools::file_set_contents("$targetdir/interfaces", $out);
 723
 724     # dump maclist
 725     PVE::Tools::file_set_contents("$targetdir/maclist", $macs);
 726
 727     # dump policy
 728
 729     $format = "%-15s %-15s %-15s %s\n";
 730     $out = sprintf($format, '#SOURCE', 'DEST', 'POLICY', 'LOG');
 731     $out .= sprintf($format, 'fw', 'all', 'ACCEPT', '');
 732
 733     # we need to disable intra-zone traffic on bridges. Else traffic
 734     # from untracked interfaces simply pass the firewall
 735     foreach my $z (sort keys %$zoneinfo) {
 736         my $zid = $zoneinfo->{$z}->{zoneref};
 737         if ($zoneinfo->{$z}->{type} eq 'bridge') {
 738             $out .= sprintf($format, $zid, $zid, 'REJECT', 'info');
 739         }
 740     }
 741     $out .= sprintf($format, 'all', 'all', 'REJECT', 'info');
 742
 743     PVE::Tools::file_set_contents("$targetdir/policy", $out);
 744
 745     # dump rules
 746     $out = '';
 747
 748     $out = sprintf($rule_format, '#ACTION', 'SOURCE', 'DEST', 'PROTO', 'DPORT', 'SPORT');
 749     foreach my $vmid (sort keys %$rules) {
 750         my $inrules = $rules->{$vmid}->{in};
 751         my $outrules = $rules->{$vmid}->{out};
 752
 753         if (scalar(@$inrules)) {
 754             $out .= "# IN to VM $vmid\n";
 755             foreach my $rule (@$inrules) {
 756                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 757                     my $net = $netinfo->{$vmid}->{$netid};
 758                     next if $rule->{iface} && $rule->{iface} ne $netid;
 759                     $out .= &$generate_input_rule($zoneinfo, $rule, $net, $netid);
 760                 }
 761             }
 762         }
 763
 764         if (scalar(@$outrules)) {
 765             $out .= "# OUT from VM $vmid\n";
 766             foreach my $rule (@$outrules) {
 767                 foreach my $netid (keys %{$netinfo->{$vmid}}) {
 768                     my $net = $netinfo->{$vmid}->{$netid};
 769                     next if $rule->{iface} && $rule->{iface} ne $netid;
 770                     $out .= &$generate_output_rule($zoneinfo, $rule, $net, $netid);
 771                 }
 772             }
 773         }
 774     }
 775
 776     PVE::Tools::file_set_contents("$targetdir/rules", $out);
 777 };
 778
 779
 780 sub parse_fw_rules {
 781     my ($filename, $fh) = @_;
 782
 783     my $section;
 784
 785     my $res = { in => [], out => [] };
 786
 787     my $macros = get_shorewall_macros();
 788     my $protocols = get_etc_protocols();
 789
 790     while (defined(my $line = <$fh>)) {
 791         next if $line =~ m/^#/;
 792         next if $line =~ m/^\s*$/;
 793
 794         if ($line =~ m/^\[(in|out)\]\s*$/i) {
 795             $section = lc($1);
 796             next;
 797         }
 798         next if !$section;
 799
 800         my ($action, $iface, $source, $dest, $proto, $dport, $sport) =
 801             split(/\s+/, $line);
 802
 803         if (!$action) {
 804             warn "skip incomplete line\n";
 805             next;
 806         }
 807
 808         my $service;
 809         if ($action =~ m/^(ACCEPT|DROP|REJECT|GROUP-(\S+))$/) {
 810             # OK
 811         } elsif ($action =~ m/^(\S+)\((ACCEPT|DROP|REJECT)\)$/) {
 812             ($service, $action) = ($1, $2);
 813             if (!$macros->{$service}) {
 814                 warn "unknown service '$service'\n";
 815                 next;
 816             }
 817         } else {
 818             warn "unknown action '$action'\n";
 819             next;
 820         }
 821
 822         $iface = undef if $iface && $iface eq '-';
 823         if ($iface && $iface !~ m/^(net0|net1|net2|net3|net4|net5)$/) {
 824             warn "unknown interface '$iface'\n";
 825             next;
 826         }
 827
 828         $proto = undef if $proto && $proto eq '-';
 829         if ($proto && !(defined($protocols->{byname}->{$proto}) ||
 830                         defined($protocols->{byid}->{$proto}))) {
 831             warn "unknown protokol '$proto'\n";
 832             next;
 833         }
 834
 835         $source = undef if $source && $source eq '-';
 836         $dest = undef if $dest && $dest eq '-';
 837
 838         $dport = undef if $dport && $dport eq '-';
 839         $sport = undef if $sport && $sport eq '-';
 840         my $nbdport = undef;
 841         my $nbsport = undef;
 842         my $nbsource = undef;
 843         my $nbdest = undef;
 844
 845         eval {
 846             $nbsource = parse_address_list($source) if $source;
 847             $nbdest = parse_address_list($dest) if $dest;
 848             $nbdport = parse_port_name_number_or_range($dport) if $dport;
 849             $nbsport = parse_port_name_number_or_range($sport) if $sport;
 850         };
 851         if (my $err = $@) {
 852             warn $err;
 853             next;
 854
 855         }
 856
 857
 858         my $rule = {
 859             action => $action,
 860             service => $service,
 861             iface => $iface,
 862             source => $source,
 863             dest => $dest,
 864             nbsource => $nbsource,
 865             nbdest => $nbdest,
 866             proto => $proto,
 867             dport => $dport,
 868             sport => $sport,
 869             nbdport => $nbdport,
 870             nbsport => $nbsport,
 871
 872         };
 873
 874         push @{$res->{$section}}, $rule;
 875     }
 876
 877     return $res;
 878 }
 879
 880 sub read_local_vm_config {
 881
 882     my $openvz = {};
 883
 884     my $qemu = {};
 885
 886     my $list = PVE::QemuServer::config_list();
 887
 888     foreach my $vmid (keys %$list) {
 889         #next if !($vmid eq '100' || $vmid eq '102');
 890         my $cfspath = PVE::QemuServer::cfs_config_path($vmid);
 891         if (my $conf = PVE::Cluster::cfs_read_file($cfspath)) {
 892             $qemu->{$vmid} = $conf;
 893         }
 894     }
 895
 896     my $vmdata = { openvz => $openvz, qemu => $qemu };
 897
 898     return $vmdata;
 899 };
 900
 901 sub read_vm_firewall_rules {
 902     my ($vmdata) = @_;
 903     my $rules = {};
 904     foreach my $vmid (keys %{$vmdata->{qemu}}, keys %{$vmdata->{openvz}}) {
 905         my $filename = "/etc/pve/firewall/$vmid.fw";
 906         my $fh = IO::File->new($filename, O_RDONLY);
 907         next if !$fh;
 908
 909         $rules->{$vmid} = parse_fw_rules($filename, $fh);
 910     }
 911
 912     return $rules;
 913 }
 914
 915 sub compile {
 916
 917     my $vmdata = read_local_vm_config();
 918     my $rules = read_vm_firewall_rules($vmdata);
 919
 920     # print Dumper($vmdata);
 921
 922     my $swdir = '/etc/shorewall';
 923     mkdir $swdir;
 924
 925     &$compile_shorewall($swdir, $vmdata, $rules);
 926
 927     PVE::Tools::run_command(['shorewall', 'compile']);
 928 }
 929
 930 sub compile_and_start {
 931     my ($restart) = @_;
 932
 933     compile();
 934
 935     PVE::Tools::run_command(['shorewall', $restart ? 'restart' : 'start']);
 936 }
 937
 938
 939 1;