dnsproxy: Ignore adding and removing of NULL servers

diff --git a/plugins/dnsproxy.c b/plugins/dnsproxy.c
index f287c3c..b35ccb0 100644 (file)
--- a/plugins/dnsproxy.c
+++ b/plugins/dnsproxy.c
@@ -793,6 +793,9 @@ static int dnsproxy_append(const char *interface, const char *domain,
 
        DBG("interface %s server %s", interface, server);
 
+       if (server == NULL)
+               return -EINVAL;
+
        if (g_str_equal(server, "127.0.0.1") == TRUE)
                return -ENODEV;
 
@@ -820,6 +823,9 @@ static int dnsproxy_remove(const char *interface, const char *domain,
 {
        DBG("interface %s server %s", interface, server);
 
+       if (server == NULL)
+               return -EINVAL;
+
        if (g_str_equal(server, "127.0.0.1") == TRUE)
                return -ENODEV;