ids.cgi: Add function to read the enabled/disabled sid files

This function is used to read-in the files for enabled or disabled sid
files and stores the sid and their state into a temporary hash which will
be returned by the function.

Signed-off-by: Stefan Schantl <stefan.schantl@ipfire.org>

html/cgi-bin/ids.cgi

@@ -914,3 +914,54 @@ sub generate_home_net_file() {
 	close(FILE);
 
 }
+
+#
+## Function to read-in the given enabled or disables sids file.
+#
+sub read_enabled_disabled_sids_file($) {
+	my ($file) = @_;
+
+	# Temporary hash to store the sids and their state. It will be
+	# returned at the end of this function.
+	my %temphash;
+
+	# Open the given filename.
+	open(FILE, "$file") or die "Could not open $file. $!\n";
+
+	# Loop through the file.
+	while(<FILE>) {
+		# Remove newlines.
+		chomp $_;
+
+		# Skip blank lines.
+		next if ($_ =~ /^\s*$/);
+
+		# Skip coments.
+		next if ($_ =~ /^\#/);
+
+		# Splitt line into sid and state part.
+		my ($state, $sid) = split(" ", $_);
+
+		# Skip line if the sid is not numeric.
+		next unless ($sid =~ /\d+/ );
+
+		# Check if the sid was enabled.
+		if ($state eq "enablesid") {
+			# Add the sid and its state as enabled to the temporary hash.
+			$temphash{$sid} = "enabled";
+		# Check if the sid was disabled.
+		} elsif ($state eq "disablesid") {
+			# Add the sid and its state as disabled to the temporary hash.
+			$temphash{$sid} = "disabled";
+		# Invalid state - skip the current sid and state.
+		} else {
+			next;
+		}
+	}
+
+	# Close filehandle.
+	close(FILE);
+
+	# Return the hash.
+	return %temphash;
+}