iOSデバイスIPの取得(ネットワーク状態)

5つのシステムファイルをインポート

//  ip
#import 
#import 
#import 
#import 
#import 

インプリメンテーション

- (NSString *)getDeviceIPIpAddresses{
    int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sockfd < 0){
        return nil;
    }
    NSMutableArray *ips = [NSMutableArray array];
    int BUFFERSIZE = 4096;
    struct ifconf ifc;
    char buffer[BUFFERSIZE], *ptr, lastname[IFNAMSIZ],*cptr;
    struct ifreq *ifr, ifrcopy;
    ifc.ifc_len = BUFFERSIZE;
    ifc.ifc_buf = buffer;
    if (ioctl(sockfd, SIOCGIFCONF, &ifc) >= 0){
        for (ptr = buffer; ptr < buffer + ifc.ifc_len;
             ){
            ifr = (struct ifreq *)ptr;
            int len = sizeof(struct sockaddr);
            
            if (ifr->ifr_addr.sa_len > len) {
                len = ifr->ifr_addr.sa_len;
                
            }            ptr += sizeof(ifr->ifr_name) + len;
            if (ifr->ifr_addr.sa_family != AF_INET) continue;
            if ((cptr = (char *)strchr(ifr->ifr_name, ':')) != NULL) *cptr = 0;
            if (strncmp(lastname, ifr->ifr_name, IFNAMSIZ) == 0)
                continue;
            memcpy(lastname, ifr->ifr_name, IFNAMSIZ);
            ifrcopy = *ifr;
            ioctl(sockfd, SIOCGIFFLAGS, &ifrcopy);
            if ((ifrcopy.ifr_flags & IFF_UP) == 0)         continue;
            NSString *ip = [NSString  stringWithFormat:@"%s", inet_ntoa(((struct sockaddr_in *)&ifr->ifr_addr)->sin_addr)];
            [ips addObject:ip];
        }
    }
    close(sockfd);
    NSString *deviceIP = @"";   
    for (int i=0; i < ips.count; i++)    { if (ips.count > 0)   {   deviceIP = [NSString stringWithFormat:@"%@",ips.lastObject];        }
    } 
    return deviceIP;
}