diff --git a/src/transport/udp.c b/src/transport/udp.c
index d7924da..19f15c5 100644
--- a/src/transport/udp.c
+++ b/src/transport/udp.c
@@ -15,6 +15,12 @@
 
 
 
+#include <sys/socket.h>
+#include <unistd.h>
+#include <string.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
 #include <System.h>
 #include "App/apptransport.h"
 
@@ -38,6 +44,9 @@ static UDP * _udp_init(AppTransportPluginHelper * helper,
 		AppTransportMode mode, char const * name);
 static void _udp_destroy(UDP * udp);
 
+/* useful */
+static int _udp_error(char const * message, int code);
+
 
 /* public */
 /* constants */
@@ -56,19 +65,53 @@ AppTransportPluginDefinition definition =
 /* functions */
 /* plug-in */
 /* udp_init */
+static int _init_client(UDP * udp, char const * name);
+static int _init_server(UDP * udp, char const * name);
+
 static UDP * _udp_init(AppTransportPluginHelper * helper,
 		AppTransportMode mode, char const * name)
 {
 	UDP * udp;
+	int res = -1;
 
 	if((udp = object_new(sizeof(*udp))) == NULL)
 		return NULL;
 	udp->helper = helper;
 	udp->fd = -1;
-	/* FIXME really implement */
+	switch(mode)
+	{
+		case ATM_CLIENT:
+			res = _init_client(udp, name);
+			break;
+		case ATM_SERVER:
+			res = _init_server(udp, name);
+			break;
+	}
+	/* check for errors */
+	if(res != 0)
+	{
+		_udp_destroy(udp);
+		return NULL;
+	}
 	return udp;
 }
 
+static int _init_client(UDP * udp, char const * name)
+{
+	if((udp->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+		return -_udp_error("socket", 1);
+	/* FIXME really implement */
+	return -1;
+}
+
+static int _init_server(UDP * udp, char const * name)
+{
+	if((udp->fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0)
+		return -_udp_error("socket", 1);
+	/* FIXME really implement */
+	return -1;
+}
+
 
 /* udp_destroy */
 static void _udp_destroy(UDP * udp)
@@ -76,3 +119,10 @@ static void _udp_destroy(UDP * udp)
 	/* FIXME really implement */
 	object_delete(udp);
 }
+
+/* useful */
+static int _udp_error(char const * message, int code)
+{
+	return error_set_code(code, "%s%s%s", (message != NULL) ? message : "",
+			(message != NULL) ? ": " : "", strerror(errno));
+}