COMSCRIPT -- Implementation and Experience

COMSCRIPT is a new programming language based on POSTSCRIPT, designed for the implementation of protocol stacks. COMSCRIPT is a concurrent language providing synchronousand asynchronousinter-process communications based on a hierarchical model. The language allows the implementation of both low level and high level protocol entities. COMSCRIPT also allows a process to configure dynamically its communication needs. Thus COMSCRIPT is a configuration language. This paper describes the first implementation of a COMSCRIPT interpreter with its interfaces provoding access to raw Ethernet, IP datagrams, TCP/IP sockets and ordinary files. Finally we report on the coding of a low level protocol entity (ARP) and an application level FTP-server with COMSCRIPT