On Wed, 1 May 2013 12:36:06 -0400
Kevin Han <[email protected]> wrote:

> Is there a built in function to extract the flow information (dl_dst,
> dl_src, nw_dst, etc.) from an ethernet packet? Or would I have to create
> one myself.

http://osrg.github.io/ryu/doc/library_packet.html

Would be useful for you?

> I have taken a look at the OFPMatch class which can match flow attributes,
> however, I am not sure if it is possible to extract information with this
> class.

There was discussion about the same topic on the mailing list
yesterday. Check the archive:

http://news.gmane.org/gmane.network.ryu.devel

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