int remotever;

    pktout = sftp_pkt_init(SSH_FXP_INIT);
    sftp_pkt_adduint32(pktout, SFTP_PROTO_VERSION);
    sftp_send(pktout);

    pktin = sftp_recv();
    if (!pktin) {
	fxp_internal_error("could not connect");
	return 0;
    }
    if (pktin->type != SSH_FXP_VERSION) {
	fxp_internal_error("did not receive FXP_VERSION");
	return 0;
    }
    remotever = sftp_pkt_getuint32(pktin);
    if (remotever > SFTP_PROTO_VERSION) {
	fxp_internal_error("remote protocol is more advanced than we support");