diff --git a/src/bluetooth.c b/src/bluetooth.c
index 3399cd2..b139892 100644
--- a/src/bluetooth.c
+++ b/src/bluetooth.c
@@ -65,19 +65,19 @@
 static const dc_iostream_vtable_t dc_bluetooth_vtable = {
 	sizeof(dc_socket_t),
 	dc_socket_set_timeout, /* set_timeout */
-	NULL, /* set_latency */
-	NULL, /* set_halfduplex */
-	NULL, /* set_break */
-	NULL, /* set_dtr */
-	NULL, /* set_rts */
-	NULL, /* get_lines */
+	dc_socket_set_latency, /* set_latency */
+	dc_socket_set_halfduplex, /* set_halfduplex */
+	dc_socket_set_break, /* set_break */
+	dc_socket_set_dtr, /* set_dtr */
+	dc_socket_set_rts, /* set_rts */
+	dc_socket_get_lines, /* get_lines */
 	dc_socket_get_available, /* get_received */
-	NULL, /* configure */
+	dc_socket_configure, /* configure */
 	dc_socket_read, /* read */
 	dc_socket_write, /* write */
-	NULL, /* flush */
-	NULL, /* purge */
-	NULL, /* sleep */
+	dc_socket_flush, /* flush */
+	dc_socket_purge, /* purge */
+	dc_socket_sleep, /* sleep */
 	dc_socket_close, /* close */
 };
 
diff --git a/src/irda.c b/src/irda.c
index 527e3c0..149808a 100644
--- a/src/irda.c
+++ b/src/irda.c
@@ -56,19 +56,19 @@
 static const dc_iostream_vtable_t dc_irda_vtable = {
 	sizeof(dc_socket_t),
 	dc_socket_set_timeout, /* set_timeout */
-	NULL, /* set_latency */
-	NULL, /* set_halfduplex */
-	NULL, /* set_break */
-	NULL, /* set_dtr */
-	NULL, /* set_rts */
-	NULL, /* get_lines */
+	dc_socket_set_latency, /* set_latency */
+	dc_socket_set_halfduplex, /* set_halfduplex */
+	dc_socket_set_break, /* set_break */
+	dc_socket_set_dtr, /* set_dtr */
+	dc_socket_set_rts, /* set_rts */
+	dc_socket_get_lines, /* get_lines */
 	dc_socket_get_available, /* get_received */
-	NULL, /* configure */
+	dc_socket_configure, /* configure */
 	dc_socket_read, /* read */
 	dc_socket_write, /* write */
-	NULL, /* flush */
-	NULL, /* purge */
-	NULL, /* sleep */
+	dc_socket_flush, /* flush */
+	dc_socket_purge, /* purge */
+	dc_socket_sleep, /* sleep */
 	dc_socket_close, /* close */
 };
 #endif
diff --git a/src/socket.c b/src/socket.c
index 948aa46..5ce392f 100644
--- a/src/socket.c
+++ b/src/socket.c
@@ -163,6 +163,45 @@ dc_socket_set_timeout (dc_iostream_t *abstract, int timeout)
 	return DC_STATUS_SUCCESS;
 }
 
+dc_status_t
+dc_socket_set_latency (dc_iostream_t *iostream, unsigned int value)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_set_halfduplex (dc_iostream_t *iostream, unsigned int value)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_set_break (dc_iostream_t *iostream, unsigned int value)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_set_dtr (dc_iostream_t *iostream, unsigned int value)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_set_rts (dc_iostream_t *iostream, unsigned int value)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_get_lines (dc_iostream_t *iostream, unsigned int *value)
+{
+	if (value)
+		*value = 0;
+
+	return DC_STATUS_SUCCESS;
+}
+
 dc_status_t
 dc_socket_get_available (dc_iostream_t *abstract, size_t *value)
 {
@@ -186,6 +225,12 @@ dc_socket_get_available (dc_iostream_t *abstract, size_t *value)
 	return DC_STATUS_SUCCESS;
 }
 
+dc_status_t
+dc_socket_configure (dc_iostream_t *abstract, unsigned int baudrate, unsigned int databits, dc_parity_t parity, dc_stopbits_t stopbits, dc_flowcontrol_t flowcontrol)
+{
+	return DC_STATUS_SUCCESS;
+}
+
 dc_status_t
 dc_socket_read (dc_iostream_t *abstract, void *data, size_t size, size_t *actual)
 {
@@ -293,3 +338,21 @@ out:
 
 	return status;
 }
+
+dc_status_t
+dc_socket_flush (dc_iostream_t *abstract)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_purge (dc_iostream_t *abstract, dc_direction_t direction)
+{
+	return DC_STATUS_SUCCESS;
+}
+
+dc_status_t
+dc_socket_sleep (dc_iostream_t *abstract, unsigned int timeout)
+{
+	return DC_STATUS_SUCCESS;
+}
diff --git a/src/socket.h b/src/socket.h
index 1a8aa18..d612603 100644
--- a/src/socket.h
+++ b/src/socket.h
@@ -104,15 +104,48 @@ dc_socket_connect (dc_iostream_t *iostream, const struct sockaddr *addr, s_sockl
 dc_status_t
 dc_socket_set_timeout (dc_iostream_t *iostream, int timeout);
 
+dc_status_t
+dc_socket_set_latency (dc_iostream_t *iostream, unsigned int value);
+
+dc_status_t
+dc_socket_set_halfduplex (dc_iostream_t *iostream, unsigned int value);
+
+dc_status_t
+dc_socket_set_break (dc_iostream_t *iostream, unsigned int value);
+
+dc_status_t
+dc_socket_set_dtr (dc_iostream_t *iostream, unsigned int value);
+
+dc_status_t
+dc_socket_set_rts (dc_iostream_t *iostream, unsigned int value);
+
+dc_status_t
+dc_socket_get_lines (dc_iostream_t *iostream, unsigned int *value);
+
 dc_status_t
 dc_socket_get_available (dc_iostream_t *iostream, size_t *value);
 
+dc_status_t
+dc_socket_configure (dc_iostream_t *iostream, unsigned int baudrate, unsigned int databits, dc_parity_t parity, dc_stopbits_t stopbits, dc_flowcontrol_t flowcontrol);
+
 dc_status_t
 dc_socket_read (dc_iostream_t *iostream, void *data, size_t size, size_t *actual);
 
 dc_status_t
 dc_socket_write (dc_iostream_t *iostream, const void *data, size_t size, size_t *actual);
 
+dc_status_t
+dc_socket_flush (dc_iostream_t *iostream);
+
+dc_status_t
+dc_socket_purge (dc_iostream_t *iostream, dc_direction_t direction);
+
+dc_status_t
+dc_socket_sleep (dc_iostream_t *iostream, unsigned int milliseconds);
+
+dc_status_t
+dc_socket_close (dc_iostream_t *iostream);
+
 #ifdef __cplusplus
 }
 #endif /* __cplusplus */