Question

When performing an NSURLRequest to a hostname, is it possible to obtain the IP address of the server that the response came from?

The NSURL method:

- (NSString *)host;

simply returns the hostname, and I see no way of obtaining the IP address from any of the other NSURL methods.

Perhaps there is a way of performing a host lookup before inititing the NSURLRequest?

Answer 1

You can use the system call gethostbyname() to resolve a hostname then use the returning structure to get the ip address. Have a look at inet_ntop() for this last part.

EXAMPLE CODE

struct hostent *hostentry;
hostentry = gethostbyname("google.com");
char * ipbuf;
ipbuf = inet_ntoa(*((struct in_addr *)hostentry->h_addr_list[0]));
printf("%s",ipbuf);