Jan Seeger added the comment:
The intention for V4MAPPED is to allow "single-stack" usage of V4 and V6
addresses (or am I misunderstanding the purpose of the V4MAPPED socket option
here?). The application only handles V6 addresses, and the system transparently
converts from mapped
New submission from Jan Seeger :
I'm working with aiocoap, which uses the AI_V4MAPPED flag to use IPv4-mapped
addresses for dual-stack support. When trying to run on Windows, creating a
connection fails, because the socket option IPV6_V6ONLY is set to true per
default on Windows, wherea
