The only reference I have seen is this: [Dropping support for unix datagram sockets](https://groups.google.com/forum/#!topic/nodejs/iCzhcuxGP1I)
There are two ways here: either we add a parameter to connect and bind to support the socket type (but uv would not support datagram), or those two methods could be exported from native::io::net, but that would fragment more the API.
I could try to add the feature in librustuv (it was my first intention because unix sockets already work there), but I had a hard time getting around the code.