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Editorial Team
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Asked: 2026-06-12T01:16:06+00:00

After reading several tutorials I came up with the following code: (Using the famous

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After reading several tutorials I came up with the following code:
(Using the famous GCDAsyncUdpSocket class)

NSError *error = nil;

if (![mSocket connectToHost:@"192.168.1.111" onPort:9050 error:&error])
{
    NSLog(@"Error connecting: %@", [error description]);
}

usleep(100000);

NSString* str = @"teststring";
[mSocket sendData:[str dataUsingEncoding:NSUTF8StringEncoding] toHost:@"192.168.1.111" port:9050 withTimeout:-1 tag:1];

If I run this code on my iPhone everything seems fine (no errors).
But the packet never arrives on my PC.

On my PC a UDP listener is running (alongside with Wireshark). Both devices are on the same network with the same subnet and similar IPs (my PC is 192.168.1.111). Am I doing something wrong? A simple mistake hopefully?

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1 Answer

  1. Editorial Team

    The methods

    sendData:toHost:port:withTimeout:tag:
sendData:toAddress:withTimeout:tag:

    are for sending messages with unconnected sockets, so you should not call connectToHost. For a connected host, you can use

    sendData:withTimeout:tag:
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