union {
	struct ssh1_data_channel {
	    int throttling;
	} v1;
	struct ssh2_data_channel {
	    bufchain outbuffer;
	    unsigned remwindow, remmaxpkt;
	    /* locwindow is signed so we can cope with excess data. */
	    unsigned locwindow;
	    int locwindow;
	} v2;
    } v;
    union {
	struct ssh_agent_channel {
	    unsigned char *message;
	    unsigned char msglen[4];
	    unsigned lensofar, totallen;

	    }
	    bufsize = 0;
	    break;
	}
	/*
	 * If we are not buffering too much data,
	 * enlarge the window again at the remote side.
	 * If we are buffering too much, we may still
	 * need to adjust the window if the server's
	 * sent excess data.
	 */
	if (bufsize < OUR_V2_WINSIZE)
	    ssh2_set_window(c, OUR_V2_WINSIZE - bufsize);
	ssh2_set_window(c, bufsize < OUR_V2_WINSIZE ?
			OUR_V2_WINSIZE - bufsize : 0);
    }
}

static void ssh2_msg_channel_eof(Ssh ssh, struct Packet *pktin)
{
    unsigned i = ssh_pkt_getuint32(pktin);
    struct ssh_channel *c;