Modbus using Arduino Mega 2560

Hi Freelancer, My project is to write arduino Mega2560 code to enable MODBUS TCP/IP between this mega2560 and the slave simulator software present in my laptop. The functions to be accomplished are; 1, Write a coil to change its status, 2. Read that coil status and display, 3, Read Holding registers and 4. finally input registers.
Note: Those who accomplished the MODBUS TCP/IP using Arduino projects alone send you interest.