get ip address of specific Host

gistfile1.m

#include <netinet/in.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>

    Boolean result;
    CFHostRef hostRef;
    CFArrayRef addresses;
    NSString *hostname = @"m2.qiushibaike.com";
    hostRef = CFHostCreateWithName(kCFAllocatorDefault, (CFStringRef)hostname);
    if (hostRef) {
        result = CFHostStartInfoResolution(hostRef, kCFHostAddresses, NULL); // pass an error instead of NULL here to find out why it failed
        if (result == TRUE) {
            addresses = CFHostGetAddressing(hostRef, &result);            
        }
    }
    if (result == TRUE) {
//        NSLog(@"Resolved");
//        CFStringRef description = CFCopyDescription(addresses);
//        NSLog(@"Array %@", description);
        
        // Iterate through the records to extract the address information
        struct sockaddr_in*     remoteAddr;
        for(int i = 0; i < CFArrayGetCount(addresses); i++)
        {
            CFDataRef saData = (CFDataRef)CFArrayGetValueAtIndex(addresses, i);
            remoteAddr = (struct sockaddr_in*)CFDataGetBytePtr(saData);
            
            if(remoteAddr != NULL)
            {
                // Extract the ip address
//                inet_ntoa(remoteAddr->sin_addr);
                char *ip = inet_ntoa(remoteAddr->sin_addr);
                NSLog(@"!!!!!!!! %s",ip);
            }
        }
        
    } else {
        NSLog(@"Not resolved");
    }