send transit tunnel reply for ECIES router

libi2pd/I2NPProtocol.cpp

@@ -462,6 +462,27 @@ namespace i2p
 			}
 		}
 		else
+		{
+			if (i2p::context.IsECIES ())
+			{
+				uint8_t clearText[TUNNEL_BUILD_RECORD_SIZE];
+				if (HandleBuildRequestRecords (num, buf + 1, clearText))
+				{
+					if (clearText[ECIES_BUILD_REQUEST_RECORD_FLAG_OFFSET] & 0x40) // we are endpoint of outboud tunnel
+					{
+						// so we send it to reply tunnel
+						transports.SendMessage (clearText + ECIES_BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
+							CreateTunnelGatewayMsg (bufbe32toh (clearText + ECIES_BUILD_REQUEST_RECORD_NEXT_TUNNEL_OFFSET),
+								eI2NPVariableTunnelBuildReply, buf, len,
+								bufbe32toh (clearText + ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
+					}
+					else
+						transports.SendMessage (clearText + ECIES_BUILD_REQUEST_RECORD_NEXT_IDENT_OFFSET,
+							CreateI2NPMessage (eI2NPVariableTunnelBuild, buf, len,
+								bufbe32toh (clearText + ECIES_BUILD_REQUEST_RECORD_SEND_MSG_ID_OFFSET)));
+				}
+			}
+			else
 			{	
 				uint8_t clearText[BUILD_REQUEST_RECORD_CLEAR_TEXT_SIZE];
 				if (HandleBuildRequestRecords (num, buf + 1, clearText))
@@ -481,6 +502,7 @@ namespace i2p
 				}
 			}	
 		}
+	}
 
 	void HandleTunnelBuildMsg (uint8_t * buf, size_t len)
 	{