Abstract. Object-oriented design principles map well onto protocol implementations because protocols essentially manipulate two structures--packets and the states of the endpoints. In this paper we describe an implementation of the Xpress Transfer Protocol as a user-space daemon written in C++. The object-oriented model forces the programmer to properly place functionality and information ownership. The model facilitates porting to various platforms and greatly eases the task of building data delivery services.
W. Timothy Strayer, Simon Gray, Raymond E. Cline J