Simplification of checking Diagnostic response.

A CAN message will be considered as a Diagnostic response when its
arbitration ID is between standardized 0x7E8 and 0x7EF.
Checking which request belong to that response will done in later methods

Change-Id: I7a093edf44b62a4552b90fe3d8935f94dc677cf4
Signed-off-by: Romain Forlot <romain.forlot@iot.bzh>

3 files changed, 17 insertions, 26 deletions

diff --git a/src/can/can-bus.cpp b/src/can/can-bus.cpp
index 7c6ae429..18417f9c 100644
--- a/src/can/can-bus.cpp
+++ b/src/can/can-bus.cpp
@@ -179,7 +179,7 @@ void can_bus_t::can_decode_message()
 		new_can_message_cv_.wait(can_message_lock);
 		can_message = next_can_message();
 
-		active_diagnostic_request_t* adr = configuration_t::instance().get_diagnostic_manager().is_diagnostic_response(can_message);
+		if(configuration_t::instance().get_diagnostic_manager().is_diagnostic_response(can_message))
 		if(adr != nullptr)
 			process_diagnostic_signals(adr, can_message);
 		else
diff --git a/src/diagnostic/diagnostic-manager.cpp b/src/diagnostic/diagnostic-manager.cpp
index 1477b2b9..31eed0e2 100644
--- a/src/diagnostic/diagnostic-manager.cpp
+++ b/src/diagnostic/diagnostic-manager.cpp
@@ -254,29 +254,6 @@ bool diagnostic_manager_t::add_recurring_request(DiagnosticRequest* request, con
 	return added;
 }
 
-bool diagnostic_manager_t::is_diagnostic_response(const active_diagnostic_request_t& adr, const can_message_t& cm) const
-{
-	if(cm.get_id() == adr.get_id() + DIAGNOSTIC_RESPONSE_ARBITRATION_ID_OFFSET)
-		return true;
-	DEBUG(binder_interface, "Doesn't find an active diagnostic request that matches.");
-	return false;
-}
-
-active_diagnostic_request_t* diagnostic_manager_t::is_diagnostic_response(const can_message_t& can_message)
-{
-	for (auto& entry : non_recurring_requests_)
-	{
-		if(is_diagnostic_response(*entry, can_message))
-			return entry;
-	}
-
-	for (auto& entry : recurring_requests_)
-	{
-		if(is_diagnostic_response(*entry, can_message))
-			return entry;
-	}
-	return nullptr;
-}
 
 openxc_VehicleMessage diagnostic_manager_t::relay_diagnostic_response(active_diagnostic_request_t* adr, const DiagnosticResponse& response) const
 {
@@ -369,6 +346,21 @@ int diagnostic_manager_t::send_request(sd_event_source *s, uint64_t usec, void *
 	return -1;
 }
 
+
+/// @brief Tell if the CAN message received is a diagnostic response.
+/// Request broadcast ID use 0x7DF and assigned ID goes from 0x7E0 to Ox7E7. That allows up to 8 ECU to respond 
+/// at the same time. The response is the assigned ID + 0x8, so response ID can goes from 0x7E8 to 0x7EF.
+///
+/// @param[in] cm - CAN message received from the socket.
+///
+/// @return True if the active diagnostic request match the response.
+bool diagnostic_manager_t::is_diagnostic_response(const can_message_t& cm)
+{
+	if (cm.get_id() >= 0x7e8 && cm.get_id() <= 0x7ef)
+			return true;
+	return false;
+}
+
 DiagnosticShims& diagnostic_manager_t::get_shims()
 {
 	return shims_;
diff --git a/src/diagnostic/diagnostic-manager.hpp b/src/diagnostic/diagnostic-manager.hpp
index ff055d54..1db83636 100644
--- a/src/diagnostic/diagnostic-manager.hpp
+++ b/src/diagnostic/diagnostic-manager.hpp
@@ -88,12 +88,11 @@ public:
 		bool waitForMultipleResponses, const DiagnosticResponseDecoder decoder,
 		const DiagnosticResponseCallback callback, float frequencyHz);
 	
-	bool is_diagnostic_response(const active_diagnostic_request_t& adr, const can_message_t& cm) const;
-	active_diagnostic_request_t* is_diagnostic_response(const can_message_t& can_message);
 
 	openxc_VehicleMessage relay_diagnostic_response(active_diagnostic_request_t* adr, const DiagnosticResponse& response) const;
 
 	bool conflicting(active_diagnostic_request_t* request, active_diagnostic_request_t* candidate) const;
 	bool clear_to_send(active_diagnostic_request_t* request) const;
 	static int send_request(sd_event_source *s, uint64_t usec, void *userdata);
+	bool is_diagnostic_response(const can_message_t& cm);
 };