NRF51822 S110 ble_gap_sec_params_t SDK7 vs SDK8

[Omnia]

Hello,

I am currently use the new SDK 8.0 for the NRF51822 (S110 soft device). I noticed that on SDK 7.0 for the ble_gap_sec_params_t struct, there was a variable called timeout

ble_gap_sec_params_t struct for SDK7.0

This variable has now disappeared with the version of the SDK8.0 :

ble_gap_sec_params_t struct for SDK8.0

I would like to know why this modification occurred and what is the workaround now ?

In a second time, I do not well understand the purpose of the newble_gap_sec_kdist_t kdist_periph ble_gap_sec_kdist_t kdist_central. Could you please provide me some explanations and/or examples of this feature to understand what is it ?

Thanks,

[Susheel Nuguru]

For your first question:

The application can no longer specify a timeout for security procedures:  
The timeout field has been removed from ble_gap_sec_params_t, and the timeout length is now set internally by the stack according to the specification.

[Susheel Nuguru]

I asked the GAP expert and he says that it was not because of the security loophole but because the bluetooth spec now requires that the timeout must be set to 30 only. No other value is accepted so this is now set internally and the application do not have to set it.