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POVoIP socket on iOS - no notifications received
 

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    <p>I have a VoIP app that uses a TCP service to wake it up on incoming calls. The TCP socket is created with this code fragment:</p> <pre><code>CFReadStreamRef read = NULL; CFWriteStreamRef write = NULL; ... CFStreamCreatePairWithSocketToHost(NULL,(__bridge CFStringRef)shost, port, &amp;read, &amp;write); self.read = (__bridge NSInputStream*)read; self.write = (__bridge NSOutputStream*)write; if (![self.read setProperty:NSStreamNetworkServiceTypeVoIP forKey:NSStreamNetworkServiceType]){ [Log log:@"Could not set VoIP mode to read stream"]; } if (![self.write setProperty:NSStreamNetworkServiceTypeVoIP forKey:NSStreamNetworkServiceType]){ [Log log:@"Could not set VoIP mode to write stream"]; } self.read.delegate = self; self.write.delegate = self; CFRelease(read); CFRelease(write); [self.read scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode]; [self.write scheduleInRunLoop:[NSRunLoop mainRunLoop] forMode:NSDefaultRunLoopMode]; [self.read open]; [self.write open]; </code></pre> <p>I've also set the following:</p> <ol> <li>VoIP &amp; Audio in the info plist</li> <li>Keep alive timer using [UIApplication sharedApplication] setKeepAliveTimeout</li> <li>UIRequiresPersistentWiFi = YES in the info plist (quite sure it's not required, but...)</li> </ol> <p>This works well while the app is in the foreground, and even works well in the background for a few minutes, but after a few minutes - the app does not receive any new TCP messages. It doesn't work on wifi or 3G, same result for both.</p> <p>I also tried setting the property just to the read stream (though the read and write point to the same socket). Whenever I receive data on the TCP or send data I also start a short background task. BTW - everything takes place on the main thread.<br/> I've checked if the app crashes - it doesn't.<br/> The same behavior can be observed while debugging on the device - after a while - nothing is received (no crashes, warnings, anything).</p> <p>What am I doing wrong?</p>
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    1. USMoshe Gottlieb
    1. USMoshe Gottlieb
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    1. COmay worth double-check the correct VOIP flag/tag at info plist...
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      1. USdklt
    2. CODouble and triple checked... Everything works for a while and then stops.
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    3. COany chance somehow server closes the socket after timeout? ie: server fault instead of app?
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      1. USdklt
 

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