Thanks for your reply. For now, I am just using simple hub code. I just want to get Protocol number from Protocol field. I tried match class to get it but I think I use wrong approach. If there is any other method please let me know that how to get protocol number from flow entry or if it can be done through match class kindly let me know. Thanks.
On Fri, Apr 5, 2013 at 1:55 AM, Murphy McCauley <[email protected]>wrote: > On Apr 4, 2013, at 1:14 PM, Sayed Qaiser Ali Shah Shah wrote: > > > I am using Mininet 2.0 and POX controller. I am writing a script and I > need to get data from Protocol field i.e. which protocol number is being > used so that on the basis of that protocol number I can take some decision. > > I tried of.ofp_match() class but didn't get what I want. It may be > possible that I am using it wrong way. I used this class as > > > > myproto=of.ofp_match() > > log.debug("%s",myproto.nw_proto==1) > > > > Protocol number 1 shows ICMP protocol and as PING is ICMP message so, > when I ping host h2 from h1 I get False which means that protocol number > didn't match. > > Can anybody tell me how to get IP protocol field data? > > Any suggestion regarding this will be appreciable > > It's not clear to me what you're trying to do, and you haven't provided > enough code for me to guess. > > What you *are* doing is instantiating a new (empty) match object and > checking one of its fields before assigning it to something. > > Are you trying to examine a packet that has arrived as part of a packet_in > message? If so, you want to examine the event object's "parsed" attribute, > which contains the packet broken out into objects (defined in > pox.lib.packet) corresponding to the various protocols. There is some > information about this in the "Working with packets: pox.lib.packet" > section of the POX wiki. Additionally, you may want to look at the > misc.pong component, which examines incoming packets to see if they are > pings. > > https://openflow.stanford.edu/display/ONL/POX+Wiki > > If that's not helpful, maybe you can expand on what you're trying to do, > or show more code. > > -- Murphy -- *Regards Sayed Qaiser Ali Shah MSIT-12 NUST (SEECS)*
