William San Filippo created MYNEWT-388:
Summary: BLE HCI code asserts when it cannot allocate buffers for
commands and ACL data packets
Issue Type: Bug
Affects Versions: v0_9_0
Reporter: William San Filippo
Fix For: v1_0_0_beta1
The BLE HCI was asserting when it could not allocate a buffer for a command
and/or an ACL data packet. The proper behavior as per the specification is the
1) If no ACL buffer is available the controller should send the data buffer
2) The spec is not quite clear as to what should be done if there is no command
buffer available. This should not happen but if it does, we should not assert.
In this case, our controller will skip the command and simply not reply. Not
sure what else could be done in this case.
The other issue with the HCI code was loss of sync. The spec dictates that a HW
error should be sent on loss of sync. Loss of sync occurs when either an
invalid HCI packet type is seen or a HCI packet length is out of range.
The code will now send a HW error when loss of sync occurs. Note that we only
check ACL data packets for correct length; we dont check commands.
A final note: these changes are only for the controller only implementation
currently. The host only implementation need to be done.
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