Only mark handle as completed when fully received.

src/isotp/isotp.c

@@ -76,6 +76,8 @@ IsoTpMessage isotp_receive_can_frame(IsoTpShims* shims, IsoTpHandle* handle,
             message.payload = payload;
             message.size = payload_length;
             message.completed = true;
+            handle->success = true;
+            handle->completed = true;
             isotp_handle_single_frame(handle, &message);
             break;
          }

src/isotp/isotp.h

@@ -101,6 +101,11 @@ IsoTpMessage isotp_receive_can_frame(IsoTpShims* shims, IsoTpHandle* handle,
         const uint16_t arbitration_id, const uint8_t data[],
         const uint8_t size);
 
+// TODO perhaps this makes more sense as 2 functions:
+// bool isotp_continue_send()
+// IsoTpMessage isotp_continue_receive()
+// but both with the same args
+
 /* Public: Change the timeout for waiting on an ISO-TP response frame.
  *
  * If this function is not used, the conventional 100ms is used by default.

src/isotp/receive.c

@@ -20,7 +20,7 @@ IsoTpHandle isotp_receive(IsoTpShims* shims,
 
     IsoTpHandle handle = {
         success: false,
-        completed: true,
+        completed: false,
         receive_handle: receive_handle,
         type: ISOTP_HANDLE_RECEIVING
     };

tests/test_receive.c

@@ -28,6 +28,7 @@ extern void setup();
 START_TEST (test_receive_wrong_id)
 {
     const uint8_t data[CAN_MESSAGE_BYTE_SIZE] = {0};
+    fail_if(HANDLE.completed);
     IsoTpMessage message = isotp_receive_can_frame(&SHIMS, &HANDLE, 0x100, data, 1);
     fail_if(message.completed);
     fail_if(message_was_received);
@@ -47,7 +48,9 @@ END_TEST
 START_TEST (test_receive_single_frame_empty_payload)
 {
     const uint8_t data[CAN_MESSAGE_BYTE_SIZE] = {0x00, 0x12, 0x34};
+    fail_if(HANDLE.completed);
     IsoTpMessage message = isotp_receive_can_frame(&SHIMS, &HANDLE, 0x2a, data, 3);
+    fail_unless(HANDLE.completed);
     fail_unless(message.completed);
     fail_unless(message_was_received);
     ck_assert_int_eq(last_message_received_arb_id, 0x2a);