int agent_response_len;

    /*
     * Dispatch table for packet types that we may have to deal
     * with at any time.
     */
    handler_fn_t packet_dispatch[256];

    /*
     * This module deals with sending keepalives.
     */
    Pinger pinger;
};

#define logevent(s) logevent(ssh->frontend, s)

/* logevent, only printf-formatted. */
static void logeventf(Ssh ssh, const char *fmt, ...)
{

	ssh->protocol = ssh1_protocol;
	ssh1_protocol_setup(ssh);
	ssh->version = 1;
	ssh->s_rdpkt = ssh1_rdpkt;
    }
    update_specials_menu(ssh->frontend);
    ssh->state = SSH_STATE_BEFORE_SIZE;
    ssh->pinger = pinger_new(&ssh->cfg, &ssh_backend, ssh);

    sfree(s->vstring);

    crFinish(0);
}

static void ssh_gotdata(Ssh ssh, unsigned char *data, int datalen)

    int i;
    struct ssh_channel *c;

    ssh->state = SSH_STATE_CLOSED;
    if (ssh->s) {
        sk_close(ssh->s);
        ssh->s = NULL;
	notify_remote_exit(ssh->frontend);
    }
    /*
     * Now we must shut down any port and X forwardings going
     * through this connection.
     */
    if (ssh->channels) {
	for (i = 0; NULL != (c = index234(ssh->channels, i)); i++) {

	logeventf(ssh, "Connecting to %s port %d", addrbuf, port);
    }
    ssh->fn = &fn_table;
    ssh->s = new_connection(addr, *realhost, port,
			    0, 1, nodelay, keepalive, (Plug) ssh, &ssh->cfg);
    if ((err = sk_socket_error(ssh->s)) != NULL) {
	ssh->s = NULL;
	notify_remote_exit(ssh->frontend);
	return err;
    }

    return NULL;
}

/*

    ssh->v1_throttle_count = 0;
    ssh->overall_bufsize = 0;
    ssh->fallback_cmd = 0;

    ssh->protocol = NULL;

    ssh->protocol_initial_phase_done = FALSE;

    ssh->pinger = NULL;

    p = connect_to_host(ssh, host, port, realhost, nodelay, keepalive);
    if (p != NULL)
	return p;

    return NULL;
}

    if (ssh->crcda_ctx) {
	crcda_free_context(ssh->crcda_ctx);
	ssh->crcda_ctx = NULL;
    }
    if (ssh->s)
	ssh_do_close(ssh);
    sfree(ssh);
    if (ssh->pinger)
	pinger_free(ssh->pinger);
}

/*
 * Reconfigure the SSH backend.
 * 
 * Currently, this function does nothing very useful. In future,
 * however, we could do some handy things with it. For example, we
 * could make the port forwarding configurer active in the Change
 * Settings box, and this routine could close down existing
 * forwardings and open up new ones in response to changes.
 */
static void ssh_reconfig(void *handle, Config *cfg)
{
    Ssh ssh = (Ssh) handle;
    pinger_reconfig(ssh->pinger, &ssh->cfg, cfg);
    ssh->cfg = *cfg;		       /* STRUCTURE COPY */
}

/*
 * Called to send data down the Telnet connection.
 */
static int ssh_send(void *handle, char *buf, int len)