Re: [PATCH v2 11/16] Bluetooth: Add 'eir_len' param to mgmt_device_found()

Hi Marcel/Andre,

On Wed, Aug 10, 2011 at 9:50 AM, Marcel Holtmann [off-list ref] wrote:

Hi Andre,

quoted

This patch adds a new parameter to mgmt_device_found() to inform
the length of 'eir' pointer.

EIR data from LE advertising report event doesn't have a fixed length
as EIR data from extended inquiry result event does. We needed to
change mgmt_device_found() so it copies 'eir_len' bytes instead of
HCI_MAX_EIR_LENGTH.

what is the max EIR length for LE? Is it more than with BR/EDR. Or is it
just variable length?

From page 1735:

"The data consists of a significant part and a non-significant part.
[...] The non-significant part extends the Advertising and Scan
Response data to 31 octets and shall contain all-zero octets."

So actually it is not variable length, it has 31 octets, with the
non-significant part zero padded. BR/EDR EIR, on the other hand is 240
bytes (with zero padding for non-significant part as well)

Regards,
-- 
Anderson Lizardo
Instituto Nokia de Tecnologia - INdT
Manaus - Brazil