Index: uspace/lib/c/include/ipc/net.h
===================================================================
--- uspace/lib/c/include/ipc/net.h	(revision e526f08e005a95740d8b5d3b30f7cdf1db353104)
+++ uspace/lib/c/include/ipc/net.h	(revision 514ee46735ae99a559924fd69a01def4b9b49fff)
@@ -41,4 +41,7 @@
 #include <ipc/services.h>
 
+#include <net/device.h>
+#include <net/packet.h>
+
 /** Returns a value indicating whether the value is in the interval.
  * @param[in] item	The value to be checked.
@@ -175,6 +178,5 @@
 #define NET_PACKET_FIRST	(NET_SOCKET_LAST + 0)
 
-/** The last packet management system message.
- */
+/** The last packet management system message. */
 #define NET_PACKET_LAST		(NET_PACKET_FIRST + NET_PACKET_COUNT)
 
@@ -186,5 +188,5 @@
 
 /** Returns a value indicating whether the IPC call is a generic networking
- *  message.
+ * message.
  * @param[in] call The IPC call to be checked.
  */
@@ -270,4 +272,144 @@
 /*@}*/
 
+/** @name Networking specific message arguments definitions */
+/*@{*/
+
+/** Returns the device identifier message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_DEVICE(call) \
+	({ \
+		device_id_t device_id = (device_id_t) IPC_GET_ARG1(*call); \
+		device_id; \
+	})
+
+/** Returns the packet identifier message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_PACKET(call) \
+	({ \
+		packet_id_t packet_id = (packet_id_t) IPC_GET_ARG2(*call); \
+		packet_id; \
+	})
+
+/** Returns the count message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_COUNT(call) \
+	({ \
+		size_t size = (size_t) IPC_GET_ARG2(*call); \
+		size; \
+	})
+
+/** Returns the device state message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_STATE(call) \
+	({ \
+		device_state_t state = (device_state_t) IPC_GET_ARG2(*call); \
+		state; \
+	})
+
+/** Returns the maximum transmission unit message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_MTU(call) \
+	({ \
+		size_t size = (size_t) IPC_GET_ARG2(*call); \
+		size; \
+	})
+
+/** Returns the device driver service message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_SERVICE(call) \
+	({ \
+		services_t service = (services_t) IPC_GET_ARG3(*call); \
+		service; \
+	})
+
+/** Returns the target service message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_TARGET(call) \
+	({ \
+		services_t service = (services_t) IPC_GET_ARG3(*call); \
+		service; \
+	})
+
+/** Returns the sender service message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_SENDER(call) \
+	({ \
+		services_t service = (services_t) IPC_GET_ARG3(*call); \
+		service; \
+	})
+
+/** Returns the error service message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_ERROR(call) \
+	({ \
+		services_t service = (services_t) IPC_GET_ARG4(*call); \
+		service; \
+	})
+
+/** Returns the phone message argument.
+ * @param[in] call The message call structure.
+ */
+#define IPC_GET_PHONE(call) \
+	({ \
+		int phone = (int) IPC_GET_ARG5(*call); \
+		phone; \
+	})
+
+/** Sets the device identifier in the message answer.
+ * @param[out] answer The message answer structure.
+ */
+#define IPC_SET_DEVICE(answer, value) \
+	do { \
+		ipcarg_t argument = (ipcarg_t) (value); \
+		IPC_SET_ARG1(*answer, argument); \
+	} while (0)
+
+/** Sets the minimum address length in the message answer.
+ * @param[out] answer The message answer structure.
+ */
+#define IPC_SET_ADDR(answer, value) \
+	do { \
+		ipcarg_t argument = (ipcarg_t) (value); \
+		IPC_SET_ARG1(*answer, argument); \
+	} while (0)
+
+/** Sets the minimum prefix size in the message answer.
+ * @param[out] answer The message answer structure.
+ */
+#define IPC_SET_PREFIX(answer, value) \
+	do { \
+		ipcarg_t argument = (ipcarg_t) (value); \
+		IPC_SET_ARG2(*answer, argument); \
+	} while (0)
+
+/** Sets the maximum content size in the message answer.
+ * @param[out] answer The message answer structure.
+ */
+#define IPC_SET_CONTENT(answer, value) \
+	do { \
+		ipcarg_t argument = (ipcarg_t) (value); \
+		IPC_SET_ARG3(*answer, argument); \
+	} while (0)
+
+/** Sets the minimum suffix size in the message answer.
+ * @param[out] answer The message answer structure.
+ */
+#define IPC_SET_SUFFIX(answer, value) \
+	do { \
+		ipcarg_t argument = (ipcarg_t) (value); \
+		IPC_SET_ARG4(*answer, argument); \
+	} while (0)
+
+/*@}*/
+
 #endif