4.3 Quality Requirements

4.3.1 Portability Requirements

• SAM and FCM must run under Linux kernel version 2.4.18.
• It is a non-core requirement that SAM and FCM run on Linux with no specific kernel version requirement.

4.3.2 Maintainability Requirements

It is likely that Researchers will need to modify FCM to change the algorithm used to calculate window size. Thus all code documentation has to follow the coding standard set out in appendix 2 of the SQAP to make code understandable and maintainable.

4.3.3 Extendibility Requirements

• SAM may be extended to incorporate a traffic generator as part of the analysis package, and therefore should be constructed in a way that facilitates this future extension. This extendibility requirement is a non-core requirement.
• SAM must feature an interface which allows plug-in statistics packages to allow the easy extension of additional analysis functions.
• SAM must feature an interface which allows plug-in output packages thus allowing the easy addition of further output types.

4.3.4 Usability requirements

The interface for FCM will use standard Linux module conventions. That is:

• It will be loadable using the insmod and modprobe tools.
• Any runtime options will be passed as symbol values to insmod.

SAM must:

• Use standard X-window tools as provided in the GTK+ version 1.2 toolkit or in the gnome.ui version 1.4 toolkit.
• Have some form of ``tool-tips'' to simplify usage.
• Feature in-program help.

See section 5.2 for Interface requirments.

4.3.5 Reliability/Availability Requirements

• FCM must be able to transfer one gigabyte of data between Router and Receiver.