Always send at least sizeof(UWB_NOTIFICATION_DATA) bytes for notifications

[corbin-phipps]

Type

• Bug fix
• Feature addition
• Feature update
• Breaking change
• Non-functional change
• Documentation
• Infrastructure

Goals

Currently, the handling of notifications is failing the UWB CX validation test. This happens because the CX requires a buffer of at least sizeof(UWB_NOTIFICATION_DATA) (0x50) bytes, but lpBytesReturned of DeviceIoControl returns fewer bytes. The reason for this is because UWB_NOTIFICATION_DATA has a union member, which causes sizeof to account for the largest member in the union. A specific notification of the non-largest type may actually use fewer bytes than what sizeof calculates for the union.

Therefore, the notification handling should always send at least sizeof(UWB_NOTIFICATION_DATA) bytes, not just the number of bytes actually used for a specific notification.

Technical Details

• Changed the notification handling to resize the buffer to the maximum of bytesRequired and sizeof(UWB_NOTIFICATION_DATA).

Test Results

nocli output displays expected values, eliminating the unexpected "insufficient buffer" messages from before.

Reviewer Focus

None.

Future Work

None.

Checklist

• Build target all compiles cleanly.
• clang-format and clang-tidy deltas produced no new output.
• Newly added functions include doxygen-style comment block.