FreeDiameter - library for the Diameter protocol

 Diameter is a protocol designed to carry Authentication, Authorization and
 Accounting (AAA) payload. It is an evolution of the RADIUS protocol (as the
 name suggests).
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 freeDiameter is an implementation of the Diameter protocol.
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 This shared library contains the core of the framework. It establishes the
 network connections with other Diameter peers and performs the tasks described
 in Diameter Base Protocol, such as watchdogs, basic routing, ... It also
 handles the loading of extensions (see below)