2 ###############################################################################
4 # IPFire.org - A linux based firewall #
5 # Copyright (C) 2007-2018 IPFire Team <info@ipfire.org> #
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. #
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. #
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/>. #
20 ###############################################################################
24 # enable only the following on debugging purpose
26 #use CGI::Carp 'fatalsToBrowser';
28 require '/var/ipfire/general-functions.pl';
29 require "${General::swroot}/lang.pl";
30 require "${General::swroot}/header.pl";
31 require "${General::swroot}/ids-functions.pl";
34 my %mainsettings = ();
37 my %rulesetsources = ();
42 # Read-in main settings, for language, theme and colors.
43 &General
::readhash
("${General::swroot}/main/settings", \
%mainsettings);
44 &General
::readhash
("/srv/web/ipfire/html/themes/".$mainsettings{'THEME'}."/include/colors.txt", \
%color);
46 # Get the available network zones, based on the config type of the system and store
47 # the list of zones in an array.
48 my @network_zones = &IDS
::get_available_network_zones
();
50 # File where the used rulefiles are stored.
51 my $idsusedrulefilesfile = "$IDS::settingsdir/suricata-used-rulefiles.yaml";
53 # File where the addresses of the homenet are stored.
54 my $idshomenetfile = "$IDS::settingsdir/suricata-homenet.yaml";
58 &Header
::showhttpheaders
();
61 &Header
::getcgihash
(\
%cgiparams);
63 # Check if any error has been stored.
64 if (-e
$IDS::storederrorfile
) {
65 # Open file to read in the stored error message.
66 open(FILE
, "<$IDS::storederrorfile") or die "Could not open $IDS::storederrorfile. $!\n";
68 # Read the stored error message.
69 $errormessage = <FILE
>;
74 # Delete the file, which is now not longer required.
75 unlink($IDS::storederrorfile
);
79 ## Grab all available snort rules and store them in the idsrules hash.
81 # Open snort rules directory and do a directory listing.
82 opendir(DIR
, $IDS::rulespath
) or die $!;
83 # Loop through the direcory.
84 while (my $file = readdir(DIR
)) {
87 next unless (-f
"$IDS::rulespath/$file");
90 next if (-z
"$IDS::rulespath/$file");
92 # Use a regular expression to find files ending in .rules
93 next unless ($file =~ m/\.rules$/);
95 # Ignore files which are not read-able.
96 next unless (-R
"$IDS::rulespath/$file");
98 # Call subfunction to read-in rulefile and add rules to
100 &readrulesfile
("$file");
105 # Gather used rulefiles.
107 # Check if the file for activated rulefiles is not empty.
108 if(-f
$idsusedrulefilesfile) {
109 # Open the file for used rulefile and read-in content.
110 open(FILE
, $idsusedrulefilesfile) or die "Could not open $idsusedrulefilesfile. $!\n";
118 # Loop through the array.
119 foreach my $line (@lines) {
124 next if ($line =~ /\#/);
127 next if ($line =~ /^\s*$/);
129 # Gather rule sid and message from the ruleline.
130 if ($line =~ /.*- (.*)/) {
133 # Add the rulefile to the %idsrules hash.
134 $idsrules{$rulefile}{'Rulefile'}{'State'} = "on";
140 if ($cgiparams{'RULESET'} eq $Lang::tr
{'update'}) {
141 my $enabled_sids_file = "$IDS::settingsdir/oinkmaster-enabled-sids.conf";
142 my $disabled_sids_file = "$IDS::settingsdir/oinkmaster-disabled-sids.conf";
144 # Arrays to store which rulefiles have been enabled and will be used.
145 my @enabled_rulefiles;
147 # Hash to store the user-enabled and disabled sids.
148 my %enabled_disabled_sids;
150 # Loop through the hash of idsrules.
151 foreach my $rulefile(keys %idsrules) {
152 # Check if the rulefile is enabled.
153 if ($cgiparams{$rulefile} eq "on") {
154 # Add rulefile to the array of enabled rulefiles.
155 push(@enabled_rulefiles, $rulefile);
157 # Drop item from cgiparams hash.
158 delete $cgiparams{$rulefile};
162 # Read-in the files for enabled/disabled sids.
163 # This will be done by calling the read_enabled_disabled_sids_file function two times
164 # and merge the returned hashes together into the enabled_disabled_sids hash.
165 %enabled_disabled_sids = (
166 &read_enabled_disabled_sids_file
($disabled_sids_file),
167 &read_enabled_disabled_sids_file
($enabled_sids_file));
169 # Loop through the hash of idsrules.
170 foreach my $rulefile (keys %idsrules) {
171 # Loop through the single rules of the rulefile.
172 foreach my $sid (keys %{$idsrules{$rulefile}}) {
173 # Skip the current sid if it is not numeric.
174 next unless ($sid =~ /\d+/ );
176 # Check if there exists a key in the cgiparams hash for this sid.
177 if (exists($cgiparams{$sid})) {
178 # Look if the rule is disabled.
179 if ($idsrules{$rulefile}{$sid}{'State'} eq "off") {
180 # Check if the state has been set to 'on'.
181 if ($cgiparams{$sid} eq "on") {
182 # Add/Modify the sid to/in the enabled_disabled_sids hash.
183 $enabled_disabled_sids{$sid} = "enabled";
185 # Drop item from cgiparams hash.
186 delete $cgiparams{$rulefile}{$sid};
190 # Look if the rule is enabled.
191 if ($idsrules{$rulefile}{$sid}{'State'} eq "on") {
192 # Check if the state is 'on' and should be disabled.
193 # In this case there is no entry
194 # for the sid in the cgiparams hash.
195 # Add/Modify it to/in the enabled_disabled_sids hash.
196 $enabled_disabled_sids{$sid} = "disabled";
198 # Drop item from cgiparams hash.
199 delete $cgiparams{$rulefile}{$sid};
205 # Open enabled sid's file for writing.
206 open(ENABLED_FILE
, ">$enabled_sids_file") or die "Could not write to $enabled_sids_file. $!\n";
208 # Open disabled sid's file for writing.
209 open(DISABLED_FILE
, ">$disabled_sids_file") or die "Could not write to $disabled_sids_file. $!\n";
211 # Write header to the files.
212 print ENABLED_FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
213 print DISABLED_FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
215 # Check if the hash for enabled/disabled files contains any entries.
216 if (%enabled_disabled_sids) {
217 # Loop through the hash.
218 foreach my $sid (keys %enabled_disabled_sids) {
219 # Check if the sid is enabled.
220 if ($enabled_disabled_sids{$sid} eq "enabled") {
221 # Print the sid to the enabled_sids file.
222 print ENABLED_FILE
"enablesid $sid\n";
223 # Check if the sid is disabled.
224 } elsif ($enabled_disabled_sids{$sid} eq "disabled") {
225 # Print the sid to the disabled_sids file.
226 print DISABLED_FILE
"disablesid $sid\n";
227 # Something strange happende - skip the current sid.
234 # Close file for enabled_sids after writing.
237 # Close file for disabled_sids after writing.
238 close(DISABLED_FILE
);
240 # Open file for used rulefiles.
241 open (FILE
, ">$idsusedrulefilesfile") or die "Could not write to $idsusedrulefilesfile. $!\n";
243 # Write yaml header to the file.
244 print FILE
"%YAML 1.1\n";
245 print FILE
"---\n\n";
247 # Write header to file.
248 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
250 # Check if the enabled_rulefiles array contains any entries.
251 if (@enabled_rulefiles) {
252 # Loop through the array of rulefiles which should be loaded and write the to the file.
253 foreach my $file (@enabled_rulefiles) {
254 print FILE
" - $file\n";
258 # Close file after writing.
261 # Lock the webpage and print message.
262 &working_notice
("$Lang::tr{'snort working'}");
264 # Call oinkmaster to alter the ruleset.
267 # Check if the IDS is running.
268 if(&IDS
::ids_is_running
()) {
269 # Call suricatactrl to perform a reload.
270 &IDS
::call_suricatactrl
("reload");
276 # Download new ruleset.
277 } elsif ($cgiparams{'RULESET'} eq $Lang::tr
{'download new ruleset'}) {
278 # Check if the red device is active.
279 unless (-e
"${General::swroot}/red/active") {
280 $errormessage = $Lang::tr
{'could not download latest updates'};
283 # Check if enought free disk space is availabe.
284 if(&IDS
::checkdiskspace
()) {
285 $errormessage = "$Lang::tr{'not enough disk space'}";
288 # Check if any errors happend.
289 unless ($errormessage) {
290 # Lock the webpage and print notice about downloading
292 &working_notice
("$Lang::tr{'snort working'}");
294 # Call subfunction to download the ruleset.
295 if(&IDS
::downloadruleset
()) {
296 $errormessage = $Lang::tr
{'could not download latest updates'};
298 # Call function to store the errormessage.
299 &IDS
::_store_error_message
($errormessage);
301 # Preform a reload of the page.
304 # Call subfunction to launch oinkmaster.
307 # Check if the IDS is running.
308 if(&IDS
::ids_is_running
()) {
309 # Call suricatactrl to perform a reload.
310 &IDS
::call_suricatactrl
("reload");
313 # Perform a reload of the page.
317 # Save snort settings.
318 } elsif ($cgiparams{'IDS'} eq $Lang::tr
{'save'}) {
322 # Read-in current (old) IDS settings.
323 &General
::readhash
("$IDS::settingsdir/settings", \
%oldidssettings);
325 # Prevent form name from been stored in conf file.
326 delete $cgiparams{'IDS'};
328 # Check if an oinkcode has been provided.
329 if ($cgiparams{'OINKCODE'}) {
330 # Check if the oinkcode contains unallowed chars.
331 unless ($cgiparams{'OINKCODE'} =~ /^[a-z0-9]+$/) {
332 $errormessage = $Lang::tr
{'invalid input for oink code'};
336 # Go on if there are no error messages.
337 if (!$errormessage) {
338 # Store settings into settings file.
339 &General
::writehash
("$IDS::settingsdir/settings", \
%cgiparams);
342 # Generate file to store the home net.
343 &generate_home_net_file
();
345 # File which contains wheater the rules should be changed.
346 my $modify_sids_file = "$IDS::settingsdir/oinkmaster-modify-sids.conf";
348 # Open modify sid's file for writing.
349 open(FILE
, ">$modify_sids_file") or die "Could not write to $modify_sids_file. $!\n";
352 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
354 # Check if the configured runmode is IPS.
355 if ($cgiparams{'RUN_MODE'} eq 'IPS') {
356 # Tell oinkmaster to switch all rules from alert to drop.
357 print FILE
"modifysid \* \"alert\" \| \"drop\"\n";
363 # Check if the runmode has been changed.
364 if($cgiparams{'RUN_MODE'} ne $oldidssettings{'RUN_MODE'}) {
365 # Check if a ruleset exists.
367 # Lock the webpage and print message.
368 &working_notice
("$Lang::tr{'snort working'}");
370 # Call oinkmaster to alter the ruleset.
373 # Set reload_page to "True".
378 # Check if the IDS currently is running.
379 if(&IDS
::ids_is_running
()) {
380 # Check if ENABLE_IDS is set to on.
381 if($cgiparams{'ENABLE_IDS'} eq "on") {
382 # Call suricatactrl to perform a reload of suricata.
383 &IDS
::call_suricatactrl
("reload");
385 # Call suricatactrl to stop suricata.
386 &IDS
::call_suricatactrl
("stop");
389 # Call suricatactrl to start suricata.
390 &IDS
::call_suricatactrl
("start");
393 # Check if the page should be reloaded.
395 # Perform a reload of the page.
400 # Read-in idssettings
401 &General
::readhash
("$IDS::settingsdir/settings", \
%idssettings);
403 # If the runmode has not been configured yet, set default value.
404 unless(exists($idssettings{'RUN_MODE'})) {
405 # Set default to IPS.
406 $idssettings{'RUN_MODE'} = 'IPS';
409 $checked{'ENABLE_IDS'}{'off'} = '';
410 $checked{'ENABLE_IDS'}{'on'} = '';
411 $checked{'ENABLE_IDS'}{$idssettings{'ENABLE_IDS'}} = "checked='checked'";
412 $checked{'RUN_MODE'}{'IDS'} = '';
413 $checked{'RUN_MODE'}{'IPS'} = '';
414 $checked{'RUN_MODE'}{$idssettings{'RUN_MODE'}} = "checked='checked'";
415 $selected{'RULES'}{'nothing'} = '';
416 $selected{'RULES'}{'community'} = '';
417 $selected{'RULES'}{'emerging'} = '';
418 $selected{'RULES'}{'registered'} = '';
419 $selected{'RULES'}{'subscripted'} = '';
420 $selected{'RULES'}{$idssettings{'RULES'}} = "selected='selected'";
422 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
427 // Tiny java script function to show/hide the rules
428 // of a given category.
429 function showhide(tblname) {
430 \$("#" + tblname).toggle();
436 &Header
::openbigbox
('100%', 'left', '', $errormessage);
439 &Header
::openbox
('100%', 'left', $Lang::tr
{'error messages'});
440 print "<class name='base'>$errormessage\n";
441 print " </class>\n";
445 # Draw current state of the IDS
446 &Header
::openbox
('100%', 'left', $Lang::tr
{'intrusion detection system'});
448 # Check if the IDS is running and obtain the process-id.
449 my $pid = &IDS
::ids_is_running
();
451 # Display some useful information, if suricata daemon is running.
453 # Gather used memory.
454 my $memory = &get_memory_usage
($pid);
457 <table width='95%' cellspacing='0' class='tbl'>
459 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'intrusion detection'}</strong></th>
463 <td class='base'>$Lang::tr{'guardian daemon'}</td>
464 <td align='center' colspan='2' width='75%' bgcolor='${Header::colourgreen}'><font color='white'><strong>$Lang::tr{'running'}</strong></font></td>
468 <td class='base'></td>
469 <td bgcolor='$color{'color20'}' align='center'><strong>PID</strong></td>
470 <td bgcolor='$color{'color20'}' align='center'><strong>$Lang::tr{'memory'}</strong></td>
474 <td class='base'></td>
475 <td bgcolor='$color{'color22'}' align='center'>$pid</td>
476 <td bgcolor='$color{'color22'}' align='center'>$memory KB</td>
481 # Otherwise display a hint that the service is not launched.
483 <table width='95%' cellspacing='0' class='tbl'>
485 <th bgcolor='$color{'color20'}' colspan='3' align='left'><strong>$Lang::tr{'intrusion detection'}</strong></th>
489 <td class='base'>$Lang::tr{'guardian daemon'}</td>
490 <td align='center' width='75%' bgcolor='${Header::colourred}'><font color='white'><strong>$Lang::tr{'stopped'}</strong></font></td>
497 # Draw elements for IDS configuration.
498 &Header
::openbox
('100%', 'center', $Lang::tr
{'settings'});
502 # Check if a ruleset allready has been downloaded.
503 if ( -f
"$IDS::rulestarball"){
504 # Call stat on the filename to obtain detailed information.
505 my @Info = stat("$IDS::rulestarball");
507 # Grab details about the creation time.
508 $rulesdate = localtime($Info[9]);
512 <form method='post' action='$ENV{'SCRIPT_NAME'}'>
513 <table width='100%' border='0'>
515 <td class='base' colspan='4'>
516 <input type='checkbox' name='ENABLE_IDS' $checked{'ENABLE_IDS'}{'on'}>$Lang::tr{'ids activate'} $Lang::tr{'intrusion detection system'}
521 <td colspan='4'><br><br></td>
525 <td class='base' colspan='4'><b>$Lang::tr{'runmode'}</b></td>
529 <td class='base' colspan='4'>
530 <input type='radio' name='RUN_MODE' value='IDS' $checked{'RUN_MODE'}{'IDS'}>$Lang::tr{'intrusion detection system2'}    
531 <input type='radio' name='RUN_MODE' value='IPS' $checked{'RUN_MODE'}{'IPS'}>$Lang::tr{'intrusion prevention system'}
536 <td colspan='4'><br></td>
540 <td colspan='4'><b>$Lang::tr{'ids traffic analyze'}</b><br></td>
547 # Loop through the array of available networks and print config options.
548 foreach my $zone (@network_zones) {
552 # Convert current zone name to upper case.
553 my $zone_upper = uc($zone);
555 # Grab checkbox status from settings hash.
556 if ($idssettings{"ENABLE_IDS_$zone_upper"} eq "on") {
557 $checked_input = "checked = 'checked'";
560 print "<td class='base' width='25%'>\n";
561 print "<input type='checkbox' name='ENABLE_IDS_$zone_upper' $checked_input>$Lang::tr{'enabled on'} $Lang::tr{$zone}\n";
569 <td colspan='4'><br><br></td>
573 <td colspan='4'><b>$Lang::tr{'ids rules update'}</b></td>
577 <td colspan='4'><select name='RULES'>
578 <option value='nothing' $selected{'RULES'}{'nothing'} >$Lang::tr{'no'}</option>
579 <option value='emerging' $selected{'RULES'}{'emerging'} >$Lang::tr{'emerging rules'}</option>
580 <option value='community' $selected{'RULES'}{'community'} >$Lang::tr{'community rules'}</option>
581 <option value='registered' $selected{'RULES'}{'registered'} >$Lang::tr{'registered user rules'}</option>
582 <option value='subscripted' $selected{'RULES'}{'subscripted'} >$Lang::tr{'subscripted user rules'}</option>
589 <br>$Lang::tr{'ids rules license'} <a href='https://www.snort.org/subscribe' target='_blank'>www.snort.org</a>$Lang::tr{'ids rules license1'}</br>
590 <br>$Lang::tr{'ids rules license2'} <a href='https://www.snort.org/account/oinkcode' target='_blank'>Get an Oinkcode</a>, $Lang::tr{'ids rules license3'}</br>
595 <td colspan='4' nowrap='nowrap'>Oinkcode: <input type='text' size='40' name='OINKCODE' value='$idssettings{'OINKCODE'}'></td>
599 <td colspan='4' align='left'><br>
600 <input type='submit' name='RULESET' value='$Lang::tr{'download new ruleset'}'> $Lang::tr{'updates installed'}: $rulesdate
610 <td align='right'><input type='submit' name='IDS' value='$Lang::tr{'save'}' /></td>
619 &Header
::openbox
('100%', 'LEFT', $Lang::tr
{'intrusion detection system rules'});
620 print"<form method='POST' action='$ENV{'SCRIPT_NAME'}'>\n";
622 # Output display table for rule files
623 print "<table width='100%'>\n";
625 # Local variable required for java script to show/hide
626 # rules of a rulefile.
627 my $rulesetcount = 1;
629 # Loop over each rule file
630 foreach my $rulefile (sort keys(%idsrules)) {
631 my $rulechecked = '';
633 # Check if rule file is enabled
634 if ($idsrules{$rulefile}{'Rulefile'}{'State'} eq 'on') {
635 $rulechecked = 'CHECKED';
638 # Table and rows for the rule files.
640 print"<td class='base' width='5%'>\n";
641 print"<input type='checkbox' name='$rulefile' $rulechecked>\n";
643 print"<td class='base' width='90%'><b>$rulefile</b></td>\n";
644 print"<td class='base' width='5%' align='right'>\n";
645 print"<a href=\"javascript:showhide('ruleset$rulesetcount')\">SHOW</a>\n";
649 # Rows which will be hidden per default and will contain the single rules.
650 print"<tr style='display:none' id='ruleset$rulesetcount'>\n";
651 print"<td colspan='3'>\n";
658 # New table for the single rules.
659 print "<table width='100%'>\n";
661 # Loop over rule file rules
662 foreach my $sid (sort {$a <=> $b} keys(%{$idsrules{$rulefile}})) {
664 my $ruledefchecked = '';
666 # Skip rulefile itself.
667 next if ($sid eq "Rulefile");
669 # If 2 rules have been displayed, start a new row
670 if (($lines % 2) == 0) {
673 # Increase rows by once.
679 $col="bgcolor='$color{'color20'}'";
681 $col="bgcolor='$color{'color22'}'";
685 if ($idsrules{$rulefile}{$sid}{'State'} eq 'on') {
686 $ruledefchecked = 'CHECKED';
689 # Create rule checkbox and display rule description
690 print "<td class='base' width='5%' align='right' $col>\n";
691 print "<input type='checkbox' NAME='$sid' $ruledefchecked>\n";
693 print "<td class='base' width='45%' $col>$idsrules{$rulefile}{$sid}{'Description'}</td>";
695 # Increment rule count
699 # If do not have a second rule for row, create empty cell
700 if (($lines % 2) != 0) {
701 print "<td class='base'></td>";
704 # Close display table
705 print "</tr></table></td></tr>";
707 # Finished whith the rule file, increase count.
711 # Close display table
717 <td width='100%' align='right'><input type='submit' name='RULESET' value='$Lang::tr{'update'}'>
718 <!-- space for future online help link -->
726 &Header
::closebigbox
();
727 &Header
::closepage
();
730 ## A function to display a notice, to lock the webpage and
731 ## tell the user which action currently will be performed.
733 sub working_notice
($) {
736 &Header
::openpage
($Lang::tr
{'intrusion detection system'}, 1, '');
737 &Header
::openbigbox
('100%', 'left', '', $errormessage);
738 &Header
::openbox
( 'Waiting', 1,);
742 <td><img src='/images/indicator.gif' alt='$Lang::tr{'aktiv'}' /></td>
748 &Header
::closebigbox
();
749 &Header
::closepage
();
753 ## A tiny function to perform a reload of the webpage after one second.
756 print "<meta http-equiv='refresh' content='1'>\n";
763 ## Private function to read-in and parse rules of a given rulefile.
765 ## The given file will be read, parsed and all valid rules will be stored by ID,
766 ## message/description and it's state in the idsrules hash.
768 sub readrulesfile
($) {
769 my $rulefile = shift;
771 # Open rule file and read in contents
772 open(RULEFILE
, "$IDS::rulespath/$rulefile") or die "Unable to read $rulefile!";
774 # Store file content in an array.
775 my @lines = <RULEFILE
>;
780 # Loop over rule file contents
781 foreach my $line (@lines) {
782 # Remove whitespaces.
786 next if ($line =~ /^\s*$/);
792 # Gather rule sid and message from the ruleline.
793 if ($line =~ m/.*msg:\"(.*?)\"\; .* sid:(.*?); /) {
797 # Check if a rule has been found.
799 # Add rule to the idsrules hash.
800 $idsrules{$rulefile}{$sid}{'Description'} = $msg;
802 # Grab status of the rule. Check if ruleline starts with a "dash".
803 if ($line =~ /^\#/) {
804 # If yes, the rule is disabled.
805 $idsrules{$rulefile}{$sid}{'State'} = "off";
807 # Otherwise the rule is enabled.
808 $idsrules{$rulefile}{$sid}{'State'} = "on";
816 ## Function to get the used memory of a given process-id.
818 sub get_memory_usage
($) {
823 # Try to open statm file for the given process-id on the pseudo
825 if (open(FILE
, "/proc/$pid/statm")) {
829 # Splitt file content and store in an array.
830 my @memory = split(/ /,$temp);
835 # Calculate memory usage.
838 # Return memory usage.
842 # If the file could not be open, return nothing.
847 ## Function to generate the file which contains the home net information.
849 sub generate_home_net_file
() {
852 # Read-in network settings.
853 &General
::readhash
("${General::swroot}/ethernet/settings", \
%netsettings);
855 # Get available network zones.
856 my @network_zones = &IDS
::get_available_network_zones
();
858 # Temporary array to store network address and prefix of the configured
862 # Loop through the array of available network zones.
863 foreach my $zone (@network_zones) {
864 # Skip the red network - It never can be part to the home_net!
865 next if($zone eq "red");
867 # Convert current zone name into upper case.
870 # Generate key to access the required data from the netsettings hash.
871 my $zone_netaddress = $zone . "_NETADDRESS";
872 my $zone_netmask = $zone . "_NETMASK";
874 # Obtain the settings from the netsettings hash.
875 my $netaddress = $netsettings{$zone_netaddress};
876 my $netmask = $netsettings{$zone_netmask};
878 # Convert the subnetmask into prefix notation.
879 my $prefix = &Network
::convert_netmask2prefix
($netmask);
881 # Generate full network string.
882 my $network = join("/", $netaddress,$prefix);
884 # Check if the network is valid.
885 if(&Network
::check_subnet
($network)) {
886 # Add the generated network to the array of networks.
887 push(@networks, $network);
891 # Format home net declaration.
894 # Loop through the array of networks.
895 foreach my $network (@networks) {
896 # Add the network to the line.
897 $line = "$line" . "$network";
899 # Check if the current network was the last in the array.
900 if ($network eq $networks[-1]) {
902 $line = "$line" . "\]\"";
904 # Add "," for the next network.
905 $line = "$line" . "\,";
909 # Open file to store the addresses of the home net.
910 open(FILE
, ">$idshomenetfile") or die "Could not open $idshomenetfile. $!\n";
913 print FILE
"%YAML 1.1\n";
914 print FILE
"---\n\n";
916 # Print notice about autogenerated file.
917 print FILE
"#Autogenerated file. Any custom changes will be overwritten!\n";
919 # Print the generated and required HOME_NET declaration to the file.
920 print FILE
"HOME_NET:\t$line\n";
928 ## Function to read-in the given enabled or disables sids file.
930 sub read_enabled_disabled_sids_file
($) {
933 # Temporary hash to store the sids and their state. It will be
934 # returned at the end of this function.
937 # Open the given filename.
938 open(FILE
, "$file") or die "Could not open $file. $!\n";
940 # Loop through the file.
946 next if ($_ =~ /^\s*$/);
949 next if ($_ =~ /^\#/);
951 # Splitt line into sid and state part.
952 my ($state, $sid) = split(" ", $_);
954 # Skip line if the sid is not numeric.
955 next unless ($sid =~ /\d+/ );
957 # Check if the sid was enabled.
958 if ($state eq "enablesid") {
959 # Add the sid and its state as enabled to the temporary hash.
960 $temphash{$sid} = "enabled";
961 # Check if the sid was disabled.
962 } elsif ($state eq "disablesid") {
963 # Add the sid and its state as disabled to the temporary hash.
964 $temphash{$sid} = "disabled";
965 # Invalid state - skip the current sid and state.