Open Source C WebSocket Libraries for Windows

facil.io is an evented Network library written in C. facil.io provides high performance TCP/IP network services by using an evented design that was tested to provide an easy solution to the C10K problem. facil.io includes a mini-framework for Web Applications, with a fast HTTP / WebSocket server, integrated Pub/Sub, optional Redis connectivity, easy JSON handling, Mustache template rendering and more nifty tidbits. facil.io powers the HTTP/Websockets Ruby Iodine server and it can easily power your application as well. facil.io is easy to code with and aims at minimizing the developer's learning curve. In addition to detailed documentation and examples, the API is unified in style and the same types and API used for HTTP requests is used for JSON and Mustache rendering - so there's less to learn. facil.io should work on Linux / BSD / macOS (and possibly CYGWIN) and is continuously tested on both Linux and macOS.

WIC is a C99 implementation of rfc6455 websockets designed for embedded applications. WIC decouples the websocket protocol from the transport layer. This makes it possible to use WIC over any transport layer assuming that you are prepared to do the integration work.

A Lightweight and fully asynchronous WebSocket client library based on libev for Embedded Linux. And provide Lua-binding. libev tries to follow the UNIX toolbox philosophy of doing one thing only, as good as possible.