Objective-C - iPhone to Server

I will write it
@You need to get the following library.
https://github.com/msgpack/msgpack-objectivec

@ On the Iphone
static void listenerCallback(CFSocketRef socket, CFSocketCallBackType type,
                             CFDataRef address, const void *data, void *info) {

    NSString* str = nil;
    switch (type) {
        case kCFSocketNoCallBack:
            str = @"kCFSocketNoCallBack";
            break;
        case kCFSocketReadCallBack:
            str = @"kCFSocketReadCallBack";
            break;
        case kCFSocketAcceptCallBack:
            str = @"kCFSocketAcceptCallBack";
            break;
        case kCFSocketDataCallBack:
            str = @"kCFSocketDataCallBack";
            break;
        case kCFSocketConnectCallBack:
            str = @"kCFSocketConnectCallBack";
            break;
        case kCFSocketWriteCallBack:
            str = @"kCFSocketWriteCallBack";
            break;
        default:
            break;
    }

    if(type == kCFSocketDataCallBack) {
        // Get a message from server
        NSData* receiveData = (NSData*)data;
        NSDictionary* parsed = [receiveData messagePackParse];
        NSNumber *numx = [parsed objectForKey:@"x"];
        NSNumber *numy = [parsed objectForKey:@"y"];
        NSLog(@"numx is %f", [numx floatValue]);
        NSLog(@"numy is %f", [numy floatValue]);

        /* another way to print
         UInt8 *gotData = CFDataGetBytePtr((CFDataRef)data);
         int len = CFDataGetLength((CFDataRef)data);
         for(int i=0; i < len; i++) {
             NSLog(@"%c",*(gotData+i));
         }
         */
    } else if(type == kCFSocketWriteCallBack) {
        // Send a message to server
        CGPoint translation = CGPointMake(5.0, 6.0);
        NSNumber *numx = [NSNumber numberWithFloat:translation.x];
        NSNumber *numy = [NSNumber numberWithFloat:translation.y];
        NSDictionary *someDictionary = [[NSDictionary alloc] initWithObjectsAndKeys:
                                        numx, @"x",
                                        numy, @"y",
                                        nil];
        NSData* packed = [someDictionary messagePack];
        CFSocketSendData(socket, NULL, (CFDataRef)packed, 10);
        // CFRelease((CFDataRef)packed);
    }

}

@ On the Server
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