[iPhone]Wi-Fi로 연결된 ip 구하기.

#include <ifaddrs.h>

#include <arpa/inet.h>

#include <sys/types.h>

#include <sys/socket.h>

#include <net/if.h>

#include <net/if_dl.h>

#if ! defined(IFT_ETHER)

#define IFT_ETHER 0x6/* Ethernet CSMACD */

#endif

+ (NSString *)localIPAddress

{

BOOL success;

struct ifaddrs * addrs = NULL;

const struct ifaddrs * cursor;

NSString *address = @"";

success = (getifaddrs(&addrs) == 0);

if (success) 

{

cursor = addrs;

while (cursor != NULL) {

if (cursor->ifa_addr->sa_family == AF_INET && (cursor->ifa_flags & IFF_LOOPBACK) == 0) // this second test keeps from picking up the loopback address

{

NSString *name = [NSString stringWithUTF8String:cursor->ifa_name];

if ([name isEqualToString:@"en0"]) 

{ // found the WiFi adapter

address = [NSString stringWithUTF8String:inet_ntoa(((struct sockaddr_in *)cursor->ifa_addr)->sin_addr)];

break;

}

}

cursor = cursor->ifa_next;

}

freeifaddrs(addrs);

}

return address;

}

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*자료출처 : http://peepleware.com/home/12081