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Send NSData back and forth between devices - GameCenter alternative

I am trying to create an application that will require sending data between two devices over the internet. Similar to GameKit, but I would like to implement a feature without GameKit as I want to be able to exchange between different types of smartphones. I want it to be like a live match in GameCenter.

in GameKit I would use the following:

//To send the data
- (BOOL)sendDataToAllPlayers:(NSData *)data withDataMode:(GKMatchSendDataMode)mode error:(NSError **)error;

//To receive the data
- (void)match:(GKMatch *)theMatch didReceiveData:(NSData *)data fromPlayer:(NSString *)playerID;

Is there a way to accomplish this same implementation without GameKit? I know Fun Run does real-time matches without GameCenter.

Any answer is greatly appreciated! Thanks in advance for your help!

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Well, this is trivial with a dedicated server with which both devices open a persistent connection, and perhaps impossible without it (how do your devices find each other if both their IP addresses change?)



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