while(1) {
        sockfd = ff_socket(AF_INET, SOCK_DGRAM, 0);
        if (sockfd < 0) {
            printf("ff_socket failed, sockfd:%d, errno:%d, %s\n", sockfd, errno, strerror(errno));
            printf("Done %u\n", i);
            exit(1);
        }
        ff_close(sockfd);
        i++;
    }