config/forwardfw/rules.pl

   1 #!/usr/bin/perl
   2 ###############################################################################
   3 #                                                                             #
   4 # IPFire.org - A linux based firewall                                         #
   5 # Copyright (C) 2012                                                                                                              #
   6 #                                                                             #
   7 # This program is free software: you can redistribute it and/or modify        #
   8 # it under the terms of the GNU General Public License as published by        #
   9 # the Free Software Foundation, either version 3 of the License, or           #
  10 # (at your option) any later version.                                         #
  11 #                                                                             #
  12 # This program is distributed in the hope that it will be useful,             #
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  15 # GNU General Public License for more details.                                #
  16 #                                                                             #
  17 # You should have received a copy of the GNU General Public License           #
  18 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  19 #                                                                             #
  20 ###############################################################################
  21 #                                                                                                                                                         #
  22 # Hi folks! I hope this code is useful for all. I needed something to handle  #
  23 # my VPN Connections in a comfortable way.                                                                #
  24 # This script builds firewallrules from the webinterface                      #
  25 ###############################################################################
  26
  27 use strict;
  28 use Time::Local;
  29 no warnings 'uninitialized';
  30
  31 # enable only the following on debugging purpose
  32 #use warnings;
  33 #use CGI::Carp 'fatalsToBrowser';
  34
  35 my %fwdfwsettings=();
  36 my %defaultNetworks=();
  37 my %configfwdfw=();
  38 my %color=();
  39 my %icmptypes=();
  40 my %ovpnSettings=();
  41 my %customgrp=();
  42 our %sourcehash=();
  43 our %targethash=();
  44 my @timeframe=();
  45 my %configinputfw=();
  46 my %configoutgoingfw=();
  47 my %configdmzfw=();
  48 my %aliases=();
  49 my @DPROT=();
  50 my @p2ps=();
  51 require '/var/ipfire/general-functions.pl';
  52 require "${General::swroot}/lang.pl";
  53 require "${General::swroot}/forward/bin/firewall-lib.pl";
  54
  55 my $configdmz           = "${General::swroot}/forward/dmz";
  56 my $configfwdfw         = "${General::swroot}/forward/config";
  57 my $configinput     = "${General::swroot}/forward/input";
  58 my $configoutgoing  = "${General::swroot}/forward/outgoing";
  59 my $p2pfile                     = "${General::swroot}/forward/p2protocols";
  60 my $configgrp           = "${General::swroot}/fwhosts/customgroups";
  61 my $netsettings         = "${General::swroot}/ethernet/settings";
  62 my $errormessage='';
  63 my $orange;
  64 my $green;
  65 my $blue;
  66 my ($TYPE,$PROT,$SPROT,$DPROT,$SPORT,$DPORT,$TIME,$TIMEFROM,$TIMETILL,$SRC_TGT);
  67 my $CHAIN="FORWARDFW";
  68 my $conexists='off';
  69
  70 &General::readhash("${General::swroot}/forward/settings", \%fwdfwsettings);
  71 &General::readhash("$netsettings", \%defaultNetworks);
  72 &General::readhasharray($configdmz, \%configdmzfw);
  73 &General::readhasharray($configfwdfw, \%configfwdfw);
  74 &General::readhasharray($configinput, \%configinputfw);
  75 &General::readhasharray($configoutgoing, \%configoutgoingfw);
  76 &General::readhasharray($configgrp, \%customgrp);
  77 &General::get_aliases(\%aliases);
  78
  79 #check if we have an internetconnection
  80 open (CONN,"/var/ipfire/red/iface");
  81 my $con = <CONN>;
  82 close(CONN);
  83 if (-f "/var/ipfire/red/active"){
  84         $conexists='on';
  85 }
  86
  87 ################################
  88 #    DEBUG/TEST                #
  89 ################################
  90 my $MODE=1;     # 0 - normal operation
  91                                 # 1 - print configline and rules to console
  92                                 #
  93 ################################
  94 my $param=shift;
  95
  96 if($param eq 'flush'){
  97         if ($MODE eq '1'){
  98                 print " Flushing chains...\n";
  99         }
 100         &flush;
 101 }else{
 102         if ($MODE eq '1'){
 103                 print " Flushing chains...\n";
 104         }
 105         &flush;
 106         if ($MODE eq '1'){
 107                 print " Preparing rules...\n";
 108         }
 109         &preparerules;
 110         if($MODE eq '0'){
 111                 if ($fwdfwsettings{'POLICY'} eq 'MODE1'){
 112                         &p2pblock;
 113                         system ("/usr/sbin/firewall-policy");
 114                 }elsif($fwdfwsettings{'POLICY'} eq 'MODE2'){
 115                         $defaultNetworks{'GREEN_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'GREEN_NETMASK'});
 116                         $green="$defaultNetworks{'GREEN_ADDRESS'}/$defaultNetworks{'GREEN_NETMASK'}";
 117                         if ($defaultNetworks{'BLUE_DEV'}){
 118                                 $defaultNetworks{'BLUE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'BLUE_NETMASK'});
 119                                 $blue="$defaultNetworks{'BLUE_ADDRESS'}/$defaultNetworks{'BLUE_NETMASK'}";
 120                                 #set default rules for BLUE
 121                                 system ("iptables -A $CHAIN -s $blue -d $green -j RETURN");
 122                         }
 123                         if ($defaultNetworks{'ORANGE_DEV'}){
 124                                 $defaultNetworks{'ORANGE_NETMASK'}=&General::iporsubtocidr($defaultNetworks{'ORANGE_NETMASK'});
 125                                 $orange="$defaultNetworks{'ORANGE_ADDRESS'}/$defaultNetworks{'ORANGE_NETMASK'}";
 126                                 #set default rules for DMZ
 127                                 system ("iptables -A $CHAIN -s $orange -d $green -j RETURN");
 128                                 if ($defaultNetworks{'BLUE_DEV'}){
 129                                         system ("iptables -A $CHAIN -s $orange -d $blue -j RETURN");
 130                                 }
 131                         }
 132                         &p2pblock;
 133                         system ("iptables -A $CHAIN -m state --state NEW -j ACCEPT");
 134                         system ("/usr/sbin/firewall-policy");
 135                 }
 136         }
 137 }
 138 sub flush
 139 {
 140         system ("iptables -F FORWARDFW");
 141         system ("iptables -F INPUTFW");
 142         system ("iptables -F OUTGOINGFW");
 143 }
 144 sub preparerules
 145 {
 146         if (! -z  "${General::swroot}/forward/dmz"){
 147                 &buildrules(\%configdmzfw);
 148         }
 149         if (! -z  "${General::swroot}/forward/config"){
 150                 &buildrules(\%configfwdfw);
 151         }
 152         if (! -z  "${General::swroot}/forward/input"){
 153                 &buildrules(\%configinputfw);
 154         }
 155         if (! -z  "${General::swroot}/forward/outgoing"){
 156                 &buildrules(\%configoutgoingfw);
 157         }
 158 }
 159 sub buildrules
 160 {
 161         my $hash=shift;
 162         my $STAG;
 163         foreach my $key (sort {$a <=> $b} keys %$hash){
 164                 next if ($$hash{$key}[6] eq 'RED' && $conexists eq 'off' );
 165                 $STAG='';
 166                 if($$hash{$key}[2] eq 'ON'){
 167                         #get source ip's
 168                         if ($$hash{$key}[3] eq 'cust_grp_src'){
 169                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 170                                                 if($customgrp{$grp}[0] eq $$hash{$key}[4]){
 171                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"src");
 172                                         }
 173                                 }
 174                         }else{
 175                                 &get_address($$hash{$key}[3],$$hash{$key}[4],"src");
 176                         }
 177                         #get target ip's
 178                         if ($$hash{$key}[5] eq 'cust_grp_tgt'){
 179                                 foreach my $grp (sort {$a <=> $b} keys %customgrp){
 180                                         if($customgrp{$grp}[0] eq $$hash{$key}[6]){
 181                                                 &get_address($customgrp{$grp}[3],$customgrp{$grp}[2],"tgt");
 182                                         }
 183                                 }
 184                         }elsif($$hash{$key}[5] eq 'ipfire'){
 185                                 if($$hash{$key}[6] eq 'Default IP'){
 186                                         open(FILE, "/var/ipfire/red/local-ipaddress") or die 'Unable to open config file.';
 187                                         $targethash{$key}[0]= <FILE>;
 188                                         close(FILE);
 189                                 }else{
 190                                         foreach my $alias (sort keys %aliases){
 191                                                 if ($$hash{$key}[6] eq $alias){
 192                                                         $targethash{$key}[0]=$aliases{$alias}{'IPT'};
 193                                                 }
 194                                         }
 195                                 }
 196                         }else{
 197                                 &get_address($$hash{$key}[5],$$hash{$key}[6],"tgt");
 198                         }
 199                         ##get source prot and port
 200                         $SRC_TGT='SRC';
 201                         $SPROT = &get_prot($hash,$key);
 202                         $SPORT = &get_port($hash,$key);
 203                         $SRC_TGT='';
 204
 205                         ##get target prot and port
 206                         $DPROT=&get_prot($hash,$key);
 207
 208                         if ($DPROT eq ''){$DPROT=' ';}
 209                         @DPROT=split(",",$DPROT);
 210
 211                         #get time if defined
 212                         if($$hash{$key}[18] eq 'ON'){
 213                                 my ($time1,$time2,$daylight);
 214                                 my $daylight=$$hash{$key}[28];
 215                                 $time1=&get_time($$hash{$key}[26],$daylight);
 216                                 $time2=&get_time($$hash{$key}[27],$daylight);
 217                                 if($$hash{$key}[19] ne ''){push (@timeframe,"Mon");}
 218                                 if($$hash{$key}[20] ne ''){push (@timeframe,"Tue");}
 219                                 if($$hash{$key}[21] ne ''){push (@timeframe,"Wed");}
 220                                 if($$hash{$key}[22] ne ''){push (@timeframe,"Thu");}
 221                                 if($$hash{$key}[23] ne ''){push (@timeframe,"Fri");}
 222                                 if($$hash{$key}[24] ne ''){push (@timeframe,"Sat");}
 223                                 if($$hash{$key}[25] ne ''){push (@timeframe,"Sun");}
 224                                 $TIME=join(",",@timeframe);
 225
 226                                 $TIMEFROM="--timestart $time1 ";
 227                                 $TIMETILL="--timestop $time2 ";
 228                                 $TIME="-m time --weekdays $TIME $TIMEFROM $TIMETILL";
 229                         }
 230                         if ($MODE eq '1'){
 231                                 print "NR:$key ";
 232                                 foreach my $i (0 .. $#{$$hash{$key}}){
 233                                         print "$i: $$hash{$key}[$i]  ";
 234                                 }
 235                                 print "\n";
 236                                 print"##################################\n";
 237                                 #print rules to console
 238                                 foreach my $DPROT (@DPROT){
 239                                         $DPORT = &get_port($hash,$key,$DPROT);
 240                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 241                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 242                                         foreach my $a (sort keys %sourcehash){
 243                                                 foreach my $b (sort keys %targethash){
 244                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 245                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 246                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 247                                                                         if(substr($DPORT, 2, 4) eq 'icmp'){
 248                                                                                 my @icmprule= split(",",substr($DPORT, 12,));
 249                                                                                 foreach (@icmprule){
 250                                                                                         if ($$hash{$key}[17] eq 'ON'){
 251                                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j LOG\n";
 252                                                                                         }
 253                                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j $$hash{$key}[0]\n";
 254                                                                                 }
 255                                                                         }else{
 256                                                                                 if ($$hash{$key}[17] eq 'ON'){
 257                                                                                         print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG\n";
 258                                                                                 }
 259                                                                                 print "iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]\n";
 260                                                                         }
 261                                                                 }
 262                                                         }
 263                                                 }
 264                                         }
 265                                         print"\n";
 266                                 }
 267                         }elsif($MODE eq '0'){
 268                                 foreach my $DPROT (@DPROT){
 269                                         $DPORT = &get_port($hash,$key,$DPROT);
 270                                         if ($SPROT ne ''){$PROT=$SPROT;}else{$PROT=$DPROT;}
 271                                         $PROT="-p $PROT" if ($PROT ne '' && $PROT ne ' ');
 272                                         foreach my $a (sort keys %sourcehash){
 273                                                 foreach my $b (sort keys %targethash){
 274                                                         if ($sourcehash{$a}[0] ne $targethash{$b}[0] && $targethash{$b}[0] ne 'none' || $sourcehash{$a}[0] eq '0.0.0.0/0.0.0.0'){
 275                                                                 if($SPROT eq '' || $SPROT eq $DPROT || $DPROT eq ' '){
 276                                                                         if(substr($sourcehash{$a}[0], 3, 3) ne 'mac' && $sourcehash{$a}[0] ne ''){ $STAG="-s";}
 277                                                                         if(substr($DPORT, 2, 4) eq 'icmp'){
 278                                                                                 my @icmprule= split(",",substr($DPORT, 12,));
 279                                                                                 foreach (@icmprule){
 280                                                                                         if ($$hash{$key}[17] eq 'ON'){
 281                                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] -- icmp-type $_ $TIME -j LOG");
 282                                                                                         }
 283                                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] --icmp-type $_ $TIME -j $$hash{$key}[0]");
 284                                                                                 }
 285                                                                         }else{
 286                                                                                 if ($$hash{$key}[17] eq 'ON'){
 287                                                                                         system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j LOG");
 288                                                                                 }
 289                                                                                 system ("iptables -A $$hash{$key}[1] $PROT $STAG $sourcehash{$a}[0] $SPORT -d $targethash{$b}[0] $DPORT $TIME -j $$hash{$key}[0]");
 290                                                                         }
 291                                                                 }
 292                                                         }
 293                                                 }
 294                                         }
 295                                 }
 296                         }
 297                 }
 298                 %sourcehash=();
 299                 %targethash=();
 300                 undef $TIME;
 301                 undef $TIMEFROM;
 302                 undef $TIMETILL;
 303         }
 304 }
 305 sub get_time
 306 {
 307         my $val=shift;
 308         my $val1=shift;
 309         my $time;
 310         my $minutes;
 311         my $ruletime;
 312         $minutes = &utcmin($val);
 313         $ruletime = $minutes + &time_get_utc($val);
 314         if ($ruletime < 0){$ruletime +=1440;}
 315         if ($ruletime > 1440){$ruletime -=1440;}
 316         $time=sprintf "%02d:%02d", $ruletime / 60, $ruletime % 60;
 317         return $time;
 318 }
 319 sub time_get_utc
 320 {
 321         # Calculates the UTCtime from a given time
 322         my $val=shift;
 323         my @localtime=localtime(time);
 324         my @gmtime=gmtime(time);
 325         my $diff = ($gmtime[2]*60+$gmtime[1]%60)-($localtime[2]*60+$localtime[1]%60);
 326         return $diff;
 327 }
 328 sub utcmin
 329 {
 330         my $ruletime=shift;
 331         my ($hrs,$min) = split(":",$ruletime);
 332         my $newtime = $hrs*60+$min;
 333         return $newtime;
 334 }
 335 sub p2pblock
 336 {
 337         my $P2PSTRING;
 338         my $DO;
 339         open( FILE, "< $p2pfile" ) or die "Unable to read $p2pfile";
 340         @p2ps = <FILE>;
 341         close FILE;
 342         my $CMD = "-m ipp2p";
 343         foreach my $p2pentry (sort @p2ps) {
 344                 my @p2pline = split( /\;/, $p2pentry );
 345                 if ( $fwdfwsettings{'POLICY'} eq 'MODE1' ) {
 346                         $DO = "ACCEPT";
 347                         if ("$p2pline[2]" eq "on") {
 348                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 349                         }
 350                 }else {
 351                         $DO = "RETURN";
 352                         if ("$p2pline[2]" eq "off") {
 353                                 $P2PSTRING = "$P2PSTRING --$p2pline[1]";
 354                         }
 355                 }
 356         }
 357         if ($MODE eq 1){
 358                 if($P2PSTRING){
 359                         print"/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO\n";
 360                 }
 361         }else{
 362                 if($P2PSTRING){
 363                         system("/sbin/iptables -A FORWARDFW $CMD $P2PSTRING -j $DO");
 364                 }
 365         }
 366 }
 367
 368 sub get_address
 369 {
 370         my $base=shift; #source of checking ($configfwdfw{$key}[x] or groupkey
 371         my $base2=shift;
 372         my $type=shift; #src or tgt
 373         my $hash;
 374         if ($type eq 'src'){
 375                 $hash=\%sourcehash;
 376         }else{
 377                 $hash=\%targethash;
 378         }
 379         my $key = &General::findhasharraykey($hash);
 380         if($base eq 'src_addr' || $base eq 'tgt_addr' ){
 381                 if (&General::validmac($base2)){
 382                         $$hash{$key}[0] = "-m mac --mac-source $base2";
 383                 }else{
 384                         $$hash{$key}[0] = $base2;
 385                 }
 386         }elsif($base eq 'std_net_src' || $base eq 'std_net_tgt' || $base eq 'Standard Network'){
 387                 $$hash{$key}[0]=&fwlib::get_std_net_ip($base2,$con);
 388         }elsif($base eq 'cust_net_src' || $base eq 'cust_net_tgt' || $base eq 'Custom Network'){
 389                 $$hash{$key}[0]=&fwlib::get_net_ip($base2);
 390         }elsif($base eq 'cust_host_src' || $base eq 'cust_host_tgt' || $base eq 'Custom Host'){
 391                 $$hash{$key}[0]=&fwlib::get_host_ip($base2,$type);
 392         }elsif($base eq 'ovpn_net_src' || $base eq 'ovpn_net_tgt' || $base eq 'OpenVPN static network'){
 393                 $$hash{$key}[0]=&fwlib::get_ovpn_net_ip($base2,1);
 394         }elsif($base eq 'ovpn_host_src' ||$base eq 'ovpn_host_tgt' || $base eq 'OpenVPN static host'){
 395                 $$hash{$key}[0]=&fwlib::get_ovpn_host_ip($base2,33);
 396         }elsif($base eq 'ovpn_n2n_src' ||$base eq 'ovpn_n2n_tgt' || $base eq 'OpenVPN N-2-N'){
 397                 $$hash{$key}[0]=&fwlib::get_ovpn_n2n_ip($base2,27);
 398         }elsif($base eq 'ipsec_net_src' || $base eq 'ipsec_net_tgt' || $base eq 'IpSec Network'){
 399                 $$hash{$key}[0]=&fwlib::get_ipsec_net_ip($base2,11);
 400         }
 401 }
 402 sub get_prot
 403 {
 404         my $hash=shift;
 405         my $key=shift;
 406         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 407                 if ($$hash{$key}[10] ne ''){
 408                         return"$$hash{$key}[8]";
 409                 }elsif($$hash{$key}[9] ne ''){
 410                         return"$$hash{$key}[8]";
 411                 }else{
 412                         return "$$hash{$key}[8]";
 413                 }
 414         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 415                 if ($$hash{$key}[14] eq 'TGT_PORT'){
 416                         if ($$hash{$key}[15] ne ''){
 417                                 return "$$hash{$key}[12]";
 418                         }elsif($$hash{$key}[13] ne ''){
 419                                 return "$$hash{$key}[12]";
 420                         }else{
 421                                 return "$$hash{$key}[12]";
 422                         }
 423                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 424                         return &fwlib::get_srv_prot($$hash{$key}[15]);
 425
 426                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 427                         return &fwlib::get_srvgrp_prot($$hash{$key}[15]);
 428                 }
 429         }
 430 }
 431 sub get_port
 432 {
 433         my $hash=shift;
 434         my $key=shift;
 435         my $prot=shift;
 436         if ($$hash{$key}[7] eq 'ON' && $SRC_TGT eq 'SRC'){
 437                 if ($$hash{$key}[10] ne ''){
 438                         $$hash{$key}[10] =~ s/\|/,/g;
 439                         if(index($$hash{$key}[10],",") > 0){
 440                                 return "-m multiport --sport $$hash{$key}[10] ";
 441                         }else{
 442                                 return "--sport $$hash{$key}[10] ";
 443                         }
 444                 }elsif($$hash{$key}[9] ne '' && $$hash{$key}[9] ne 'All ICMP-Types'){
 445                         return "--icmp-type $$hash{$key}[9] ";
 446                 }elsif($$hash{$key}[9] eq 'All ICMP-Types'){
 447                         return;
 448                 }
 449         }elsif($$hash{$key}[11] eq 'ON' && $SRC_TGT eq ''){
 450
 451                 if($$hash{$key}[14] eq 'TGT_PORT'){
 452                         if ($$hash{$key}[15] ne ''){
 453                                 $$hash{$key}[15] =~ s/\|/,/g;
 454                                 if(index($$hash{$key}[15],",") > 0){
 455                                         return "-m multiport --dport $$hash{$key}[15] ";
 456                                 }else{
 457                                         return "--dport $$hash{$key}[15] ";
 458                                 }
 459                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] ne 'All ICMP-Types'){
 460                                 return "--icmp-type $$hash{$key}[13] ";
 461                         }elsif($$hash{$key}[13] ne '' && $$hash{$key}[13] eq 'All ICMP-Types'){
 462                                 return;
 463                         }
 464                 }elsif($$hash{$key}[14] eq 'cust_srv'){
 465                         if ($prot ne 'ICMP'){
 466                                 return "--dport ".&fwlib::get_srv_port($$hash{$key}[15],1,$prot);
 467                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] ne 'All ICMP-Types'){
 468                                 return "--icmp-type ".&fwlib::get_srv_port($$hash{$key}[15],3,$prot);
 469                         }elsif($prot eq 'ICMP' && $$hash{$key}[15] eq 'All ICMP-Types'){
 470                                 return;
 471                         }
 472                 }elsif($$hash{$key}[14] eq 'cust_srvgrp'){
 473                         if      ($prot ne 'ICMP'){
 474                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 475                         }
 476                         elsif($prot eq 'ICMP'){
 477                                 return &fwlib::get_srvgrp_port($$hash{$key}[15],$prot);
 478                         }
 479                 }
 480         }
 481 }