CODEWITHSUNDEEP
iphoneobjective-csocketsudp
S.P.
S.P.

Reputation: 5435

How can I run UDP sockets in the background in an iPhone application?

My iPhone application is using AsyncUdpSocket to handle a UDP socket. However, when my application goes into the background in iOS 4.0 and returns to the foreground, I am getting the following error:

Application 'MyAppName' exited abnormally with signal 13: Broken pipe

This is because my sockets are disconnected when my application goes to the background.

How can I avoid this and run UDP sockets in the background?

Upvotes: 6

Views: 3094

Answers (1)

Nikolai Fetissov
Nikolai Fetissov

Reputation: 84159

This is not related to UDP. EPIPE only happens for "stream" file descriptors - Unix pipes and TCP sockets.

I'm guessing you have some sort of a control TCP connection which times out on the remote end when you go into background. You need to figure out how to keep it alive or re-connect when the app wakes up.

You can also handle (or ignore) EPIPE, see sigaction(2), and react to it accordingly on return from write(2).

Upvotes: 2

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