Handling the error case. for preventing the lock-up

Handling the error case. for preventing the lock-up

Try to send/recv packet and check the time.
If it exceed the maximum waiting time,
Just stop and give up send/recv packet
And return false to handling it correctly by user.

Handling the exceptional case more hardly.

Decrease the timeout value to 2 secs from 10 secs

Change-Id: I4d78f471d1555c66b687e4979a7110b62325e7e6