Fix filter out of default 'radio' type preferences

CHANGELOG.md

@@ -54,6 +54,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 - Fix name of NASL internal IPPROTO_IP variable. [#552](https://github.com/greenbone/openvas/pull/552)
 - Fix byte ordering and wrong PROTO identifier in dump_ipv6_packet() for openvas-nasl. [#549](https://github.com/greenbone/openvas/pull/549)
 - Fix size calculation which lead to alloc error in get_tcp_element() of openvas-nasl. [#546](https://github.com/greenbone/openvas/pull/546)
+- Fix filter out of default 'radio' type preferences [#560](https://github.com/greenbone/openvas/pull/560)
 
 ### Removed
 - Removed "network scan" mode. This includes removal of NASL API methods "scan_phase()" and "network_targets()". Sending a "network_mode=yes" in a scanner configuration will have no effect anymore. [#493](https://github.com/greenbone/openvas/pull/493)

misc/plugutils.c

@@ -473,7 +473,17 @@ get_plugin_preference (const char *oid, const char *name, int pref_id)
           if ((cname && !strcmp (cname, nvtpref_name (tmp->data)))
               || (pref_id >= 0 && pref_id == nvtpref_id (tmp->data)))
             {
-              retval = g_strdup (nvtpref_default (tmp->data));
+              if (!strcmp (nvtpref_type (tmp->data), "radio"))
+                {
+                  char **opts =
+                    g_strsplit (nvtpref_default (tmp->data), ";", -1);
+
+                  retval = g_strdup (opts[0]);
+                  g_strfreev (opts);
+                }
+              else
+                retval = g_strdup (nvtpref_default (tmp->data));
+
               break;
             }
           tmp = tmp->next;