If anybody knows any trick other than Raw sockets and creating packets please let me know

You *will* need to use a raw socket since you don't want to use your system's TCP driver. The only question is whether there exists something that will create the packets for you or not.

In reply to Re^3: Piggybacking data on TCP ACK by ikegami
in thread Piggybacking data on TCP ACK by rrekhi

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