checkWifiStatus.m

#import <arpa/inet.h>
#import <ifaddrs.h>
#import <net/if.h>

@implementation WifiUtils

- (BOOL) checkIsWifi {
    struct ifaddrs *addresses;
    struct ifaddrs *cursor;
    BOOL available = NO;
    
    if (getifaddrs(&addresses) != 0) {
        return NO;
    }
        
    cursor = addresses;
    while (cursor != NULL) {
        // ループバックアドレスを無視
        if (cursor -> ifa_addr -> sa_family == AF_INET) {
            if (!(cursor -> ifa_flags & IFF_LOOPBACK)) {
                // Wifiアダプターのチェック
                if (strcmp(cursor -> ifa_name, "en0") == 0) {
                    available = YES;
                    break;
                }
            }
        }
        cursor = cursor -> ifa_next;
    }
    
    freeifaddrs(addresses);
    return available;
}

@end