How to fetch address from CocoaAsyncUDPSocket

Question

Does anyone know how the delegate method for receiving UDP data in CocoaAsyncSockets work when it comes to fetching the source address? Specifically the method

-(void)udpSocket:(GCDAsyncUdpSocket *)sock didReceiveData:(NSData *)data fromAddress:(NSData *)address withFilterContext:(id)filterContext

The address comes back as NSData* but interpreting it using NSUTF8StringEncoding returns null and NSASCIIStringEncoding returns a bunch of garbled characters. How is it supposed to be interpreted?

Answer 1

Figured out how to do it, the data is in the form of a struct sockaddr_in*. After importing <arpa/inet.h>you can do the following:

struct sockaddr_in *addr = (struct sockaddr_in *)[address bytes];
NSString *IP = [NSString stringWithCString:inet_ntoa(addr->sin_addr) encoding:NSASCIIStringEncoding];