Motivation

• Linux offers QoS support in the kernel

  • can associate Queues, Classes and Filters with devices

• A user interface required to use the support

• Traffic Controller (tc) for Linux is one such application

  • provides a command line interface
  • can setup queues, classes and filters from the user level
  • but does not provide a programming interface

• Need for a programming interface?

  • Need for applications to be aware of QoS
    • eg. voice/video application must be able to negotiate bandwidth
  • hence access to QoS options from within an application required

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