This allows the host to provide a 32-bit integer that will be sent in the data of the ENet connect event, similar to X-SS-Ping-Payload for video and audio. The host can use this data to uniquely identify a client when IP addresses are not stable across the various separate connections, such as when the client is behind a Carrier-Grade NAT.
Moonlight Streaming Core Library
Moonlight-common-c contains the core GameStream client code shared between Moonlight clients, including Moonlight PC, Moonlight Android, Moonlight iOS, and Moonlight Chrome.
If you are implementing your own Moonlight game streaming client that can use a C library, you probably want the code here.
Note to Developers
Moonlight-common-c requires the specific version of ENet that is bundled as a submodule. This version has changes required for IPv6 compatibility and retransmission reliability, among other things. These are breaking API/ABI changes which make Moonlight-common-c incompatible with other versions of the ENet library. Attempting to runtime link to another libenet library will cause your client to crash when connecting to recent versions of GeForce Experience.