Found 3 other functions taking a
otPlatInfraIfLinkLayerAddress
argument:
Appends a Source/Target Link Layer Address Option to the ND6 message.
Get the link-layer address of the infrastructure interface. OpenThread invokes this method when the address is required, for example: when generating an ND6 message which includes a source link-layer address option.
Gets the infrastructure interface link-layer address.