TCP application resume after network cable disconnect.

[Ganesh Kumar R]

Hi ,

I am writing some application like file download through HTTP
protocol.

The application downloading file very fine as along as there was no
disruption network cable.

But when cable disrupting events like unplug and plug after some time,
i could not receive data.
i am using timed out mechanism to avoid blocking in recv() or send().
i was receiving errno as EWOULDBLOCK but i ignored it and keep on
receiving to proceed download further.

i have few more doubts :
i) i could observe the network time out error only once. but each recv
() expected to be returned time out error. is not it?
ii) After plugging the network cable there was no indication for data
receive.

Please help me how to resume the connection. after cable broken or
time out ?

Thanks in advance,
Ganesh

[eriza]

I don't know if it's possible from the application program. I've been using mobile IP to handle this kind of situation.

The issue is I guess the IP address may have disappeared or changed when the link is down, and TCP can no longer send data through the socket. You may want to check this.