C语言获取wifi状态

int getWirelessStatus(char *ath, char *ssid, char *ipAddr)
{
    int sock_fd;
    struct iwreq iwr;
	struct ifreq ifr;
    char buffer[32] = {0};
	
    if (NULL == ath)
    {
        printf("ath is NULLn");
        return -1;
    }

    if ((sock_fd = socket(PF_INET, SOCK_DGRAM, 0)) == -1)
    {
        printf("socket errn");
        return -1;
    }

    memset(&iwr, 0, sizeof(iwr));
	memset(&ifr, 0, sizeof(ifr));	 	
    strcpy(iwr.ifr_ifrn.ifrn_name, ath);
	strcpy(ifr.ifr_name, ath); 
	
	if (ioctl(sock_fd, SIOCGIFADDR, &ifr) < 0) 
	{
		perror("SIOCGIFADDR");
    }
	else
	{
		strcpy(ipAddr, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr));
		printf("ipAddr:%sn", ipAddr);
	}
    
	
	iwr.u.essid.pointer = buffer;
	iwr.u.essid.length = sizeof(buffer);
	if (ioctl(sock_fd, SIOCGIWESSID, &iwr) < 0) 
	{
		perror("SIOCGIWESSID");
	}
	else 
	{ 
		printf("ssid:%sn", (char *)iwr.u.essid.pointer); 
		memcpy(ssid, (char *)iwr.u.essid.pointer, sizeof(buffer));
	}
  
    close(sock_fd);
    return 0;
}

获取wifi连接状态ioctl(sockfd, SIOCGIWSTATS, &iwr)，SIOCGIWSTATS有的平台不支持
理论上getWirelessStatus函数返回的ssid和ipAddr都不为NULL表示wifi连接成功