decoupled request ID from files table primary key

src/libimcv/plugins/imv_attestation/imv_attestation.c

@@ -233,6 +233,7 @@ static TNC_Result send_message(TNC_ConnectionID connection_id)
 			enumerator_t *enumerator;
 			u_int32_t delimiter = SOLIDUS_UTF;
 			char *platform_info, *pathname;
+			u_int16_t request_id;
 			int id, type;
 			bool is_dir;
 
@@ -277,11 +278,12 @@ static TNC_Result send_message(TNC_ConnectionID connection_id)
 				is_dir = (type != 0);
 				DBG2(DBG_IMV, "measurement request %d for %s '%s'",
 					 id, is_dir ? "directory" : "file", pathname);
-				attr = tcg_pts_attr_req_file_meas_create(is_dir, id, delimiter,
+				request_id = attestation_state->add_request(attestation_state,
-														 pathname);
+															id, is_dir);
+				attr = tcg_pts_attr_req_file_meas_create(is_dir, request_id,
+													 delimiter, pathname);
 				attr->set_noskip_flag(attr, TRUE);
 				msg->add_attribute(msg, attr);
-				attestation_state->add_request(attestation_state, id , is_dir);
 			}
 			enumerator->destroy(enumerator);
 			break;
@@ -486,7 +488,7 @@ TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
 				{
 					tcg_pts_attr_file_meas_t *attr_cast;
 					u_int16_t request_id;
-					int file_count;
+					int file_count, file_id;
 					pts_meas_algorithms_t algo;
 					pts_file_meas_t *measurements;
 					char *platform_info;
@@ -509,7 +511,7 @@ TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
 						 request_id, file_count, (file_count == 1) ? "":"s");
 
 					if (!attestation_state->check_off_request(attestation_state,
-						request_id, &is_dir))
+						request_id, &file_id, &is_dir))
 					{
 						DBG1(DBG_IMV, "  no entry found for this request"); 
 						break;
@@ -517,7 +519,7 @@ TNC_Result TNC_IMV_ReceiveMessage(TNC_IMVID imv_id,
 
 					/* check hashes from database against measurements */
 					e_hash = pts_db->create_hash_enumerator(pts_db, 
-									platform_info, algo, request_id, is_dir);
+									platform_info, algo, file_id, is_dir);
 					if (!measurements->verify(measurements, e_hash, is_dir))
 					{
 						measurement_error = TRUE;

src/libimcv/plugins/imv_attestation/imv_attestation_state.c

@@ -26,7 +26,8 @@ typedef struct request_t request_t;
  * PTS File/Directory Measurement request entry
  */
 struct request_t {
-	int id;
+	u_int16_t id;
+	int file_id;
 	bool is_dir;
 };
 
@@ -65,6 +66,11 @@ struct private_imv_attestation_state_t {
 	 */
 	TNC_IMV_Evaluation_Result eval;
 
+	/**
+	 * Request counter
+	 */
+	u_int16_t request_counter;
+
 	/**
 	 * List of PTS File/Directory Measurement requests
 	 */
@@ -194,19 +200,23 @@ METHOD(imv_attestation_state_t, get_pts, pts_t*,
 	return this->pts;
 }
 
-METHOD(imv_attestation_state_t, add_request, void,
+METHOD(imv_attestation_state_t, add_request, u_int16_t,
-	private_imv_attestation_state_t *this, int id, bool is_dir)
+	private_imv_attestation_state_t *this, int file_id, bool is_dir)
 {
 	request_t *request;
 
 	request = malloc_thing(request_t);
-	request->id = id;
+	request->id = ++this->request_counter;
+	request->file_id = file_id;
 	request->is_dir = is_dir;
 	this->requests->insert_last(this->requests, request);
+
+	return this->request_counter;
 }
 
 METHOD(imv_attestation_state_t, check_off_request, bool,
-	private_imv_attestation_state_t *this, int id, bool* is_dir)
+	private_imv_attestation_state_t *this, u_int16_t id, int *file_id,
+	bool* is_dir)
 {
 	enumerator_t *enumerator;
 	request_t *request;
@@ -218,6 +228,7 @@ METHOD(imv_attestation_state_t, check_off_request, bool,
 		if (request->id == id)
 		{
 			found = TRUE;
+			*file_id = request->file_id;
 			*is_dir = request->is_dir;
 			this->requests->remove_at(this->requests, enumerator);
 			free(request);

src/libimcv/plugins/imv_attestation/imv_attestation_state.h

@@ -75,10 +75,12 @@ struct imv_attestation_state_t {
 	/**
 	 * Add an entry to the list of pending file/directory measurement requests
 	 *
-	 * @param id				unique request ID
+	 * @param file_id			primary key into file table
 	 * @param is_dir			TRUE if directory
+	 * @return					unique request ID 
 	 */
-	void (*add_request)(imv_attestation_state_t *this, int id, bool is_dir);
+	u_int16_t (*add_request)(imv_attestation_state_t *this, int file_id,
+							 bool is_dir);
 
 	/**
 	 * Returns the number of pending file/directory measurement requests
@@ -91,11 +93,12 @@ struct imv_attestation_state_t {
 	 * Check for presence of request_id and if found remove it from the list
 	 *
 	 * @param id				unique request ID
+	 * @param file_id			primary key into file table
 	 * @param is_dir			return TRUE if request was for a directory
 	 * @return					TRUE if request ID found, FALSE otherwise
 	 */
-	bool (*check_off_request)(imv_attestation_state_t *this, int id,
+	bool (*check_off_request)(imv_attestation_state_t *this, u_int16_t id,
-							  bool *is_dir);
+							  int *file_id, bool *is_dir);
 
 };