Only defined signals can be written

This commits ensure that only known signals
could be written using the binding's api.
Before that you was able to wrote raw frames
on the CAN bus without any checks if this
was a known signals to the binding.

Bug-AGL : SPEC-2779

Change-Id: Ied6680e926f2a9c221fee31d8fb78d2d39c41132
Signed-off-by: Arthur Guyader <arthur.guyader@iot.bzh>

1 files changed, 59 insertions, 26 deletions

diff --git a/low-can-binding/binding/low-can-cb.cpp b/low-can-binding/binding/low-can-cb.cpp
index f3fe7c83..32fc83d2 100644
--- a/low-can-binding/binding/low-can-cb.cpp
+++ b/low-can-binding/binding/low-can-cb.cpp
@@ -35,6 +35,7 @@
 #include "../utils/signals.hpp"
 #include "../diagnostic/diagnostic-message.hpp"
 #include "../utils/openxc-utils.hpp"
+#include "../utils/signals.hpp"
 
 #ifdef USE_FEATURE_J1939
 	#include "../can/message/j1939-message.hpp"
@@ -548,47 +549,79 @@ static int send_message(message_t *message, const std::string& bus_name, socket_
 
 static void write_raw_frame(afb_req_t request, const std::string& bus_name, message_t *message, struct json_object *can_data, socket_type type)
 {
-	if((message->get_length() <= 8 && message->get_length() > 0 && type == socket_type::BCM)
-#ifdef USE_FEATURE_J1939
-	|| (message->get_length() < J1939_MAX_DLEN && type == socket_type::J1939)
-#endif
-	)
-	{
 
-		std::vector<uint8_t> data;
-		for (int i = 0 ; i < message->get_length() ; i++)
-		{
-			struct json_object *one_can_data = json_object_array_get_idx(can_data, i);
-			data.push_back((json_object_is_type(one_can_data, json_type_int)) ?
-					(uint8_t)json_object_get_int(one_can_data) : 0);
-		}
-		message->set_data(data);
-	}
-	else
+	struct utils::signals_found sf;
+
+	utils::signals_manager_t::instance().lookup_signals_by_id(message->get_id(), application_t::instance().get_all_signals(), sf.signals);
+
+	if( !sf.signals.empty() )
 	{
+		AFB_DEBUG("ID WRITE RAW : %d",sf.signals[0]->get_message()->get_id());
 		if(type == socket_type::BCM)
 		{
-			afb_req_fail(request, "Invalid", "Data array must hold 1 to 8 values.");
+			if(sf.signals[0]->get_message()->is_fd())
+			{
+				AFB_DEBUG("CANFD_MAX_DLEN");
+				message->set_flags(CAN_FD_FRAME);
+				message->set_maxdlen(CANFD_MAX_DLEN);
+			}
+			else
+			{
+				AFB_DEBUG("CAN_MAX_DLEN");
+				message->set_maxdlen(CAN_MAX_DLEN);
+			}
 		}
-		else if(type == socket_type::J1939)
+
+		if((message->get_length()> 0 && (
+		((type == socket_type::BCM) && (
+				(message->get_length() <= CANFD_MAX_DLEN * MAX_BCM_CAN_FRAMES && message->get_flags() & CAN_FD_FRAME)
+			||	(message->get_length() <= CAN_MAX_DLEN * MAX_BCM_CAN_FRAMES && !(message->get_flags() & CAN_FD_FRAME))
+		))
+	#ifdef USE_FEATURE_J1939
+		|| (message->get_length() <= J1939_MAX_DLEN && type == socket_type::J1939)
+	#endif
+		)))
 		{
-			afb_req_fail(request, "Invalid", "Data array too large");
+			std::vector<uint8_t> data;
+			for (int i = 0 ; i < message->get_length() ; i++)
+			{
+				struct json_object *one_can_data = json_object_array_get_idx(can_data, i);
+				data.push_back((json_object_is_type(one_can_data, json_type_int)) ?
+						(uint8_t)json_object_get_int(one_can_data) : 0);
+			}
+			message->set_data(data);
 		}
 		else
 		{
-			afb_req_fail(request, "Invalid", "Invalid socket type");
+			if(type == socket_type::BCM)
+			{
+				afb_req_fail(request, "Invalid", "Frame BCM");
+			}
+			else if(type == socket_type::J1939)
+			{
+				afb_req_fail(request, "Invalid", "Frame J1939");
+			}
+			else
+			{
+				afb_req_fail(request, "Invalid", "Frame");
+			}
+			return;
 		}
-		return;
-	}
 
-	if(! send_message(message, application_t::instance().get_can_bus_manager().get_can_device_name(bus_name),type))
-	{
-		afb_req_success(request, nullptr, "Message correctly sent");
+		if(! send_message(message, application_t::instance().get_can_bus_manager().get_can_device_name(bus_name),type))
+		{
+			afb_req_success(request, nullptr, "Message correctly sent");
+		}
+		else
+		{
+			afb_req_fail(request, "Error", "sending the message. See the log for more details.");
+		}
 	}
 	else
 	{
-		afb_req_fail(request, "Error", "sending the message. See the log for more details.");
+		afb_req_fail(request, "Error", "no find id in signals. See the log for more details.");
 	}
+
 }
 
 static void write_frame(afb_req_t request, const std::string& bus_name, json_object *json_value)