service: Do not duplicate nameserver entries

diff --git a/src/service.c b/src/service.c
index 1696e5a..c53b705 100644 (file)
--- a/src/service.c
+++ b/src/service.c
@@ -548,6 +548,12 @@ int __connman_service_nameserver_append(struct connman_service *service,
                return -EINVAL;
 
        if (service->nameservers != NULL) {
+               int i;
+
+               for (i = 0; service->nameservers[i] != NULL; i++)
+                       if (g_strcmp0(service->nameservers[i], nameserver) == 0)
+                               return -EEXIST;
+
                len = g_strv_length(service->nameservers);
                service->nameservers = g_try_renew(char *, service->nameservers,
                                                        len + 2);