The tcng language

The description of the tcng language is divided into four principal chapters:

• the current chapter introduces the most common language constructs
• chapter 3 describes additional details which are needed when adding support for new protocols, meters, or even new targets
• chapter 4 discusses historical constructs which can be found in older tcng configurations, e.g. many of the regression tests included in the tcng package

Besides imposing restrictions, a specific architecture may also add new language elements, e.g. keywords for new traffic control elements.