Network-functions: add check if variables are defined

in function network_equal and network2bin a check for undefined variables were missing.
added them.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/config/cfgroot/network-functions.pl b/config/cfgroot/network-functions.pl
index 25f9af1cadb9223b2ef38c298560d0abe8a8e345..2902aabb04ac649d1260054039c4b43534e7ff4e 100644 (file)
--- a/config/cfgroot/network-functions.pl
+++ b/config/cfgroot/network-functions.pl
@@ -111,6 +111,10 @@ sub network_equal {
        my @bin1 = &network2bin($network1);
        my @bin2 = &network2bin($network2);
 
+       if (!defined $bin1 || !defined $bin2) {
+               return undef;
+       }
+
        if ($bin1[0] eq $bin2[0] && $bin1[1] eq $bin2[1]) {
                return 1;
        }
@@ -133,6 +137,10 @@ sub network2bin($) {
        my $address_bin = &ip2bin($address);
        my $netmask_bin = &ip2bin($netmask);
 
+       if (!defined $address_bin || !defined $netmask_bin) {
+               return undef;
+       }
+
        my $network_start = $address_bin & $netmask_bin;
 
        return ($network_start, $netmask_bin);