[GitHub] [mynewt-nimble] SumeetSingh19 opened a new issue, #1417: Connection handle is 0xFFFF in attribute access callback when ble_gatts_notify() is called.

[GitBox <gi...@apache.org>]

SumeetSingh19 opened a new issue, #1417:
URL: https://github.com/apache/mynewt-nimble/issues/1417

   Whenever the server application calls `ble_gatts_notify` there is a characteristic read event (`access_cb`) and the connection handle passed to that event is 0xFFFF.
   
   The issue exists because `ble_gatts_notify` calls `ble_gatts_notify_custom` with `txom` set to `NULL`.
   In `ble_gattc_notify_custom`, if `txom` is `NULL`, it fills the buffer with data from the same attribute whose handle is passed to `ble_gatts_notify_custom`.
   The way it does that is by calling the access callback of that attribute through `ble_att_svr_read_handle', and it specifies the connection handle as `BLE_HS_CONN_HANDLE_NONE`, which is `0xFFFF`.
   
   So server application gets an invalid connection handle when notifying a client.


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