ssh_do_close(ssh);
ssh_do_close(ssh, TRUE);
static int ssh_receive(Plug plug, int urgent, char *data, int len){    Ssh ssh = (Ssh) plug;    ssh_gotdata(ssh, (unsigned char *)data, len);    if (ssh->state == SSH_STATE_CLOSED) {	ssh_do_close(ssh);	return 0;    }    return 1;}