Fix detection of invalid IP configuration methods

diff --git a/src/ipconfig.c b/src/ipconfig.c
index e272e39..bd52fc3 100644 (file)
--- a/src/ipconfig.c
+++ b/src/ipconfig.c
@@ -84,7 +84,7 @@ const char *__connman_ipconfig_method2string(enum connman_ipconfig_method method
 {
        switch (method) {
        case CONNMAN_IPCONFIG_METHOD_UNKNOWN:
-               return "unknown";
+               break;
        case CONNMAN_IPCONFIG_METHOD_OFF:
                return "off";
        case CONNMAN_IPCONFIG_METHOD_STATIC:
@@ -93,7 +93,7 @@ const char *__connman_ipconfig_method2string(enum connman_ipconfig_method method
                return "dhcp";
        }
 
-       return "unknown";
+       return NULL;
 }
 
 enum connman_ipconfig_method __connman_ipconfig_string2method(const char *method)