Modular Network Stacks in the Real- Time Executive for Multiprocessor Systems

Real-Time Executive for Multiprocessor Systems (RTEMS) is a real-time operating system used by the Experimental Physics and Industrial Control System (EPICS) open-source software for high-precision scientific instruments such as particle accelerators and telescopes. EPICS relies on the networking capabilities of RTEMS for microcontrollers that need to meet real-time constraints. However, the networking available in RTEMS either lacks the necessary drivers to be fully operational or lacks security features required in modern networks. In this paper, we introduce a modular networking architecture for RTEMS by separating the network software implementation and device drivers from the RTEMS kernel to provide them as a static library for applications to use. This networking-as-a-library concept provides application developers with better capabilities to select the network features needed for their target application and to keep their networking software undated and secure.