Pinger pinger;

    /*
     * Track incoming and outgoing data sizes and time, for
     * size-based rekeys.
     */
    unsigned long incoming_data_size, outgoing_data_size, deferred_data_size;
    unsigned long max_data_size;
    int kex_in_progress;
    long next_rekey;
};




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

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

    len = ssh2_pkt_construct(ssh, pkt);
    backlog = sk_write(ssh->s, (char *)pkt->data, len);
    if (backlog > SSH_MAX_BACKLOG)
	ssh_throttle_all(ssh, 1, backlog);

    ssh->outgoing_data_size += pkt->encrypted_len;
    if (!ssh->kex_in_progress &&
	ssh->max_data_size != 0 &&
	ssh->outgoing_data_size > ssh->max_data_size)
	do_ssh2_transport(ssh, "Initiating key re-exchange "
			  "(too much data sent)", -1, NULL);

    ssh_free_packet(pkt);
}

/*

    sfree(ssh->deferred_send_data);
    ssh->deferred_send_data = NULL;
    if (backlog > SSH_MAX_BACKLOG)
	ssh_throttle_all(ssh, 1, backlog);

    ssh->outgoing_data_size += ssh->deferred_data_size;
    if (!ssh->kex_in_progress &&
	ssh->max_data_size != 0 &&
	ssh->outgoing_data_size > ssh->max_data_size)
	do_ssh2_transport(ssh, "Initiating key re-exchange "
			  "(too much data sent)", -1, NULL);
    ssh->deferred_data_size = 0;
}

/*
 * Send all queued SSH2 packets. We send them by means of

	freebn(s->p);
    }

    /*
     * Key exchange is over. Schedule a timer for our next rekey.
     */
    ssh->kex_in_progress = FALSE;
    if (ssh->cfg.ssh_rekey_time != 0)
	ssh->next_rekey = schedule_timer(ssh->cfg.ssh_rekey_time*60*TICKSPERSEC,
					 ssh2_timer, ssh);
    
    /*
     * If this is the first key exchange phase, we must pass the
     * SSH2_MSG_NEWKEYS packet to the next layer, not because it
     * wants to see it but because it will need time to initialise
     * itself before it sees an actual packet. In subsequent key
     * exchange phases, we don't pass SSH2_MSG_NEWKEYS on, because
     * it would only confuse the layer above.

{
    if (ssh->state == SSH_STATE_CLOSED)
	return;

    if (pktin) {
	ssh->incoming_data_size += pktin->encrypted_len;
	if (!ssh->kex_in_progress &&
	    ssh->max_data_size != 0 &&
	    ssh->incoming_data_size > ssh->max_data_size)
	    do_ssh2_transport(ssh, "Initiating key re-exchange "
			      "(too much data received)", -1, NULL);
    }

    if (pktin && ssh->packet_dispatch[pktin->type]) {
	ssh->packet_dispatch[pktin->type](ssh, pktin);
	return;

    ssh->protocol_initial_phase_done = FALSE;

    ssh->pinger = NULL;

    ssh->incoming_data_size = ssh->outgoing_data_size =
	ssh->deferred_data_size = 0L;
    ssh->max_data_size = parse_blocksize(ssh->cfg.ssh_rekey_data);
    ssh->kex_in_progress = FALSE;

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

    random_ref();