while(1){
    memcpy(buf, "i am server", BUFLEN);
    if (send(clisockfd, buf, BUFLEN, 0) < 0){
      close(clisockfd);
      perror("send");
      break;
    }
    if (recv(clisockfd, buf, BUFLEN, 0) < 0){
      close(clisockfd);
      perror("recv");
      break;
    }
    printf("received: %s\n", buf);
  }
  while(1){
    printf("im done!");
    sleep(1);
  }