HI,<br><br>&nbsp;&nbsp; I am making a assignment 'file transfer using Bluetooth on hci layer'. I take code from hci.c. The problem is sometime my program works perfectly and transfer file successful. But most of the time it failed. <br>Sender sends the Handshake packet and on Receiving side it receives. Receiver sends HACK to Sender but didn't receive anything. Means<br><br>n = poll(&amp;p, 1, timeout)<br><br>n goes to 0. and the error is ETIMEDOUT. <br>But the same program works fine sometime.<br>I am getting sick from this problem. <br>I also try with different and same timeout values. but it doesn't effect in anyway.<br><br>Please help me.<br><br>Regards,<br><p>&#32;

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