remote proxy bugfix: the magic of signed bytes

java_console/io/src/main/java/com/rusefi/binaryprotocol/IoHelper.java

@@ -65,4 +65,8 @@ public class IoHelper {
     public static boolean checkResponseCode(byte[] response, byte code) {
         return response != null && response.length > 0 && response[0] == code;
     }
+
+    public static int getInt(byte firstByte, byte secondByte) {
+        return firstByte * 256 + (secondByte & 0xFF);
+    }
 }

java_console/io/src/main/java/com/rusefi/io/tcp/BinaryProtocolProxy.java

@@ -6,6 +6,7 @@ import com.rusefi.Listener;
 import com.rusefi.Timeouts;
 import com.rusefi.binaryprotocol.BinaryProtocol;
 import com.rusefi.binaryprotocol.IncomingDataBuffer;
+import com.rusefi.binaryprotocol.IoHelper;
 import com.rusefi.config.generated.Fields;
 import com.rusefi.io.IoStream;
 import com.rusefi.proxy.NetworkConnector;
@@ -80,7 +81,7 @@ public class BinaryProtocolProxy {
     @NotNull
     private static BinaryProtocolServer.Packet readClientRequest(IncomingDataBuffer in, byte firstByte) throws IOException {
         byte secondByte = in.readByte();
-        int length = firstByte * 256 + secondByte;
+        int length = IoHelper.getInt(firstByte, secondByte);
 
         return BinaryProtocolServer.readPromisedBytes(in, length);
     }

java_console/io/src/main/java/com/rusefi/io/tcp/BinaryProtocolServer.java

@@ -367,7 +367,8 @@ public class BinaryProtocolServer {
             protocolCommandHandler.handle();
             return 0;
         }
-        return first * 256 + in.readByte(ioTimeout);
+        byte secondByte = in.readByte(ioTimeout);
+        return IoHelper.getInt(first, secondByte);
     }
 
     public static Packet readPromisedBytes(DataInputStream in, int length) throws IOException {

java_console/io/src/test/java/com/rusefi/binaryprotocol/test/IoHelperTest.java

@@ -10,6 +10,11 @@ import java.io.IOException;
 import static org.junit.Assert.assertEquals;
 
 public class IoHelperTest {
+    @Test
+    public void test255() {
+        assertEquals(255, IoHelper.getInt((byte) 0, (byte) -1));
+    }
+
     @Test
     public void testSwap16() throws IOException {
         byte packet[] = {-12, 0};