Question

I’m trying to broadcast via UDP. I included the CFNetworking framwork and added AsyncUDPSocket to my project.

#import "AsyncUdpSocket.h"

I then created a socket as:

    broadcastSocket = [[AsyncUdpSocket alloc] initWithDelegate:self];

and I send data as:

[self.broadcastSocket enableBroadcast:YES error:&error];
[self.broadcastSocket sendData:[@"hello" dataUsingEncoding:NSASCIIStringEncoding] toHost:@"255.255.255.255" port:5538 withTimeout:10 tag:1];

But when I send data, AsyncUdpSocket crashes with EXC_BAD_ACCESS in

- (CFSocketRef)socketForPacket:(AsyncSendPacket *)packet

Specifically at

return ([packet->address length] == sizeof(struct sockaddr_in)) ? theSocket4 : theSocket6;

OR it also sometimes crashes in:

- (void)doSend:(CFSocketRef)theSocket

at

const void *buf  = [theCurrentSend->buffer bytes];

Is there something wrong with how I am making my socket?

Answer 1

Ah, I see now. I updated to the latest version of AsyncUDPSocket and it requires ARC. There is a warning that it issues that wasn’t popping up in my debugger, which is another problem. However, when looking at the source code, it is on line 11. Doh!

Added ARC flag (-fobjc-arc) and it runs fine!