[Click] About the arrival of packets

[Beyers Cronje]

Hi,

You typically use Click handlers for this. Click elements expose data to
users via handlers that can be accessed via /click filesystem if running
kernel Click, or ControlSocket
http://read.cs.ucla.edu/click/elements/controlsocket if running userlevel
Click.

The click fs is similar to Linux's /proc system.

For instance PollDevice exposes a count handler that returns the number of
packets PollDevice has received from the input card. You would probably find
the Counter element http://read.cs.ucla.edu/click/elements/counter and
AverageCounter element
http://read.cs.ucla.edu/click/elements/averagecounter most
helpful. They expose handlers like rate, bit_rate etc.

Obviously this means your userland apps need to monitor these handlers,
there is no notification push from Click.

Beyers

On Thu, Feb 3, 2011 at 10:39 PM, shule ney <neyshule at gmail.com> wrote:

> Hi,all:
> Is there any mechanism that the kernel mode click can notify the user-land
> if there are packets coming? Here what I want to implement is telling the
> userland whether there are packets coming and the coming rate. Thanks for
> your guys' help :D.
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