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This book is intended to be an introduction for programmers that want to extend the GNUnet framework. GNUnet is more than a simple peer-to-peer application. For developers, GNUnet is:
In particular, the architecture specifies that a peer consists of many processes communicating via protocols. Processes can be written in almost any language. C and Java APIs exist for accessing existing services and for writing extensions. It is possible to write extensions in other languages by implementing the necessary IPC protocols.
GNUnet can be extended and improved along many possible dimensions, and anyone interested in free software and freedom-enhancing networking is welcome to join the effort. This developer handbook attempts to provide an initial introduction to some of the key design choices and central components of the system. This manual is far from complete, and we welcome informed contributions, be it in the form of new chapters or insightful comments.
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