nearly completed PA-TNC error handling

src/libimcv/imc/imc_agent.h

@@ -22,6 +22,7 @@
 #define IMC_AGENT_H_
 
 #include "imc_state.h"
+#include "pa_tnc/pa_tnc_msg.h"
 
 #include <tncifimc.h>
 #include <pen/pen.h>
@@ -95,7 +96,7 @@ struct imc_agent_t {
 					  TNC_ConnectionID connection_id, imc_state_t **state);
 
 	/**
-	 * Call when an IMC-IMV message is to be sent
+	 * Call when an PA-TNC message is to be sent
 	 *
 	 * @param connection_id		network connection ID assigned by TNCC
 	 * @param msg				message to send
@@ -105,6 +106,20 @@ struct imc_agent_t {
 							   TNC_ConnectionID connection_id,
 							   chunk_t msg);
 
+	/**
+	 * Call when a PA-TNC message was received
+	 *
+	 * @param connection_id		network connection ID assigned by TNCC
+	 * @param msg				received unparsed message
+	 * @param msg_type			message type of the received message
+	 * @param pa_tnc_message	parsed PA-TNC message or NULL if an error occurred
+	 * @return					TNC result code
+	 */
+	TNC_Result (*receive_message)(imc_agent_t *this,
+								  TNC_ConnectionID connection_id, chunk_t msg,
+								  TNC_MessageType msg_type,
+								  pa_tnc_msg_t **pa_tnc_msg);
+
 	/**
 	 * Destroys an imc_agent_t object
 	 */