LuaSocket is a Lua 5.1 extension library that is composed by two parts: The
C core that provides support for the TCP and UDP transport layers, and the
set of Lua 5.1 modules that add support for functionality commonly needed by
applications that deal with the Internet.
Among the support modules, the most commonly used implement the SMTP, HTTP
and FTP. In addition there are modules for MIME, URL handling and LTN12.