Creating p2p connection iOS

Okay. So I have been trying to connect devices p2p with streams for a week. Still no result and i am getting crazy and desperate. Please Don't send me to Ray Wenderlich tutorial and GCD wiki or to CFStream Guide as i have surfed it to the holes.

So 1) Variant Here i

 + (NSString *)getIPAddress {

 NSString *address = @"error";
 struct ifaddrs *interfaces = NULL;
struct ifaddrs *temp_addr = NULL;
int success = 0;
// retrieve the current interfaces - returns 0 on success
 success = getifaddrs(&interfaces);
 if (success == 0) {
 // Loop through linked list of interfaces
 temp_addr = interfaces;
  while(temp_addr != NULL) {
    if(temp_addr->ifa_addr->sa_family == AF_INET) {
    // Check if interface is en0 which is the wifi connection on the iPhone
       if([[NSString stringWithUTF8String:temp_addr->ifa_name] isEqualToString:@"en0"]) {
            // Get NSString from C String
            address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)temp_addr->ifa_addr)->sin_addr)];

        }

    }

    temp_addr = temp_addr->ifa_next;
}
 }
 // Free memory
freeifaddrs(interfaces);
return address;

}

NSInputStream *inputStream = (__bridge_transfer NSInputStream *)readStream; NSOutputStream *outputStream = (__bridge_transfer NSOutputStream *)writeStream; [inputStream setDelegate:self]; [outputStream setDelegate:self]; [inputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [outputStream scheduleInRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode]; [inputStream open]; [outputStream open];

}

NSLog(@"stream event %lu", streamEvent);

switch (streamEvent) {

case NSStreamEventOpenCompleted:
    NSLog(@"Stream opened");
    break;
case NSStreamEventHasBytesAvailable:

    if (theStream == inputStream) {

        uint8_t buffer[1024];
        int len;

        while ([inputStream hasBytesAvailable]) {
            len = [inputStream read:buffer maxLength:sizeof(buffer)];
            if (len > 0) {

                NSString *output = [[NSString alloc] initWithBytes:buffer length:len encoding:NSASCIIStringEncoding];

                if (nil != output) {

                    NSLog(@"server said: %@", output);
                    //[self messageReceived:output];

                }
            }
        }
    }
    break;


case NSStreamEventErrorOccurred:

    NSLog(@"Can not connect to the host!");
    break;

case NSStreamEventEndEncountered:

    [theStream close];
    [theStream removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSDefaultRunLoopMode];
 //   [theStream release];
    theStream = nil;

    break;
default:
    NSLog(@"Unknown event");

}

}

Variant 2 with GCD. 1. Same 2. Set both devices to listen to input

+(void)listenSocket:(GCDAsyncSocket*)listenSocket
{

listenSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];

NSError *error = nil;
if (![listenSocket acceptOnPort:80 error:&error])
{
    NSLog(@"I goofed: %@", error);
}

}

3) Tried to connect with manually inputting IP

 +(void)connectToDeviceWithIp:(NSString*)deviceIp andSend:(HSUserCard*)tempCard andSocket:(GCDAsyncSocket*)tempSocket
{

tempSocket = [[GCDAsyncSocket alloc] initWithDelegate:self delegateQueue:dispatch_get_main_queue()];
NSError *err = nil;
if (![tempSocket connectToHost:deviceIp onPort:80 error:&err])
    NSLog(@"I goofed: %@", err);



[tempSocket writeData:[NSKeyedArchiver archivedDataWithRootObject:tempCard] withTimeout:-1 tag:1];
}

4) Result nothing - i did put several breaks on every delegate function =NOTHING.

Omg - i solved this task on Android in 20 minutes! But here it just drives crazy. Tried in several networks. Thrue 3g, home wifi. Please someone help!

The problem I can see from all of your various attempts is that you are storing the socket in a local variable - this means that once the method exits it will be released and no communications will be possible on that socket.

You need to store your socket references in strong properties.

I have created an example application using CocoaAsyncSocket that demonstrates listening for connections and making a connection along with tracking the connection state through properties holding the sockets.

It is available here https://github.com/paulw11/SocketDemo

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