* an fconfigure request on a server socket (which have no peer).
	     * Same must be done on win&mac.
	     */

	    if (len) {
		if (interp) {
		    Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			    "can't get peername: %s",
			    "cannot get peername: %s",
			    Tcl_PosixError(interp)));
		}
		return TCL_ERROR;
	    }
	}
    }

	    if (len) {
		return TCL_OK;
	    }
	    Tcl_DStringEndSublist(dsPtr);
	} else {
	    if (interp) {
		Tcl_SetObjResult(interp, Tcl_ObjPrintf(
			"can't get sockname: %s", Tcl_PosixError(interp)));
			"cannot get sockname: %s", Tcl_PosixError(interp)));
	    }
	    return TCL_ERROR;
	}
    }

    if ((len == 0) || ((len > 1) && (optionName[1] == 'k') &&
	    (strncmp(optionName, "-keepalive", len) == 0))) {