routing.cgi: Allow adding static routes with subnet masks.

It was not possible to enter networks in the subnet mask notation,
which is fixed by this patch.

Fixes #10219.

config/rootfiles/core/65/filelists/files

@@ -3,6 +3,7 @@ etc/system-release
 etc/issue
 srv/web/ipfire/cgi-bin/logs.cgi/calamaris.dat
 srv/web/ipfire/cgi-bin/ovpnmain.cgi
+srv/web/ipfire/cgi-bin/routing.cgi
 srv/web/ipfire/cgi-bin/vpnmain.cgi
 usr/sbin/ovpn-ccd-convert
 var/ipfire/general-functions.pl

html/cgi-bin/routing.cgi

@@ -118,6 +118,8 @@ if ($settings{'ACTION'} eq $Lang::tr{'toggle enable disable'}) {
 }
 
 if ($settings{'ACTION'} eq $Lang::tr{'add'}) {
+	# Convert subnet masks to CIDR notation.
+	$settings{'IP'} = &General::iporsubtocidr($settings{'IP'});
 
 # Validate inputs
 	if (( !&General::validip($settings{'IP'})) and ( !&General::validipandmask($settings{'IP'}))){
@@ -443,4 +445,4 @@ sub SortDataFile
 #
 sub BuildConfiguration {
     system '/usr/local/bin/rebuildroutes';
-}
+}