Re: [nox-dev] Nox messenger example for external c++ and nox python
So NOX's messenger is a fairly generic method for communicating with external applications over a socket. Built on top of this is jsonmessenger which communicates JSON messages over a socket. If you specifically want to use protobufs (and not JSON messages), then you'd want to use the plain messenger. However, the plain messenger is not exposed to Python -- only jsonmessenger is. So I think your options are: 1) Use JSON messages instead of protobufs, and just use jsonmessenger 2) Expose messenger to Python, and then use this to send/receive protobufs 3) Use protobufs and roll your own method for communicating with your external application (probably using Twisted) -- Murphy On Dec 20, 2011, at 11:02 PM, Harshil Anil Kumar Shah wrote: Hi Murphy. Yes, I have external C++ module which I want to communicate with Nox python module using protobuf. I am using libjson library at C++ module. -Harshil. From: Murphy McCauley [mailto:jam...@nau.edu] Sent: Wednesday, December 21, 2011 1:38 AM To: Harshil Anil Kumar Shah Cc: Kyriakos Zarifis; nox-dev@noxrepo.org Subject: Re: [nox-dev] Nox messenger example for external c++ and nox python Do you mean that you have some external program (written in C++) that you want to communicate with a NOX component (written in Python)? jsonmessenger works by sending and receiving JSON (http://json.org) messages. So on the NOX side, you use jsonmessenger. In the external program, you can use any of several libraries for doing JSON encoding/decoding. -- Murphy On Dec 20, 2011, at 1:09 AM, Harshil Anil Kumar Shah wrote: Hi, In my case where external module is C++ then can I use “pyobject” to interact with python module? From: Harshil Anil Kumar Shah Sent: Monday, December 19, 2011 3:32 PM To: 'Kyriakos Zarifis' Cc: nox-dev@noxrepo.org Subject: RE: [nox-dev] Nox messenger example for external c++ and nox python Thanks Zarifis… I looked at GUI example. It seems very useful. But in my case, client is external C++ module. So in that case do I have to use use messenger.cpp?? -Harshil. From: nox-dev-boun...@noxrepo.org [mailto:nox-dev-boun...@noxrepo.org] On Behalf Of Kyriakos Zarifis Sent: Monday, December 19, 2011 1:38 PM To: Harshil Anil Kumar Shah Cc: nox-dev@noxrepo.org Subject: Re: [nox-dev] Nox messenger example for external c++ and nox python Hi Harshil, it might not be the simplest example, but the GUI communicates with NOX using the messenger, so taking a look at that code might be a good starting point. Specifically, the file communication.py is responsible on the GUI side. Similarly on the NOX side, the code that uses the messenger to send messages to the GUI is inside the respective component that talks to the GUI. The component monitoring is one of them. Some of this is documented on the wiki here: http://noxrepo.org/noxwiki/index.php/NOX_GUI#Connecting_a_subview_to_a_NOX_component On Sun, Dec 18, 2011 at 10:41 PM, Harshil Anil Kumar Shah harshil_s...@infosys.com wrote: Hi, I want to exchange messages between external C++ module and python module in Nox using protobuf messages. I browsed through couple of posts, I figured out I can use coreapps/messenger. Can I get some working example how messenger code can be used for message exchange between external c++ and nox python module. Regards, Harshil Shah, Convergence Lab, Infosys Labs Infosys | Bangalore Mob # : +91 97428 87966. CAUTION - Disclaimer * This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS End of Disclaimer INFOSYS*** ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
Re: [nox-dev] Nox messenger example for external c++ and nox python
Thanks Murphy. I guess 2nd option is the better to go with. Can I use boost.python for that? And I guess plain messenger is exposed to python. There are messenger.py and messenger.cpp/hh files corresponding to plain messenger. -Harshil From: Murphy McCauley [mailto:jam...@nau.edu] Sent: Wednesday, December 21, 2011 2:33 PM To: Harshil Anil Kumar Shah Cc: Kyriakos Zarifis; nox-dev@noxrepo.org Subject: Re: [nox-dev] Nox messenger example for external c++ and nox python So NOX's messenger is a fairly generic method for communicating with external applications over a socket. Built on top of this is jsonmessenger which communicates JSON messages over a socket. If you specifically want to use protobufs (and not JSON messages), then you'd want to use the plain messenger. However, the plain messenger is not exposed to Python -- only jsonmessenger is. So I think your options are: 1) Use JSON messages instead of protobufs, and just use jsonmessenger 2) Expose messenger to Python, and then use this to send/receive protobufs 3) Use protobufs and roll your own method for communicating with your external application (probably using Twisted) -- Murphy On Dec 20, 2011, at 11:02 PM, Harshil Anil Kumar Shah wrote: Hi Murphy. Yes, I have external C++ module which I want to communicate with Nox python module using protobuf. I am using libjson library at C++ module. -Harshil. From: Murphy McCauley [mailto:jam...@nau.edu] Sent: Wednesday, December 21, 2011 1:38 AM To: Harshil Anil Kumar Shah Cc: Kyriakos Zarifis; nox-dev@noxrepo.orgmailto:nox-dev@noxrepo.org Subject: Re: [nox-dev] Nox messenger example for external c++ and nox python Do you mean that you have some external program (written in C++) that you want to communicate with a NOX component (written in Python)? jsonmessenger works by sending and receiving JSON (http://json.org) messages. So on the NOX side, you use jsonmessenger. In the external program, you can use any of several libraries for doing JSON encoding/decoding. -- Murphy On Dec 20, 2011, at 1:09 AM, Harshil Anil Kumar Shah wrote: Hi, In my case where external module is C++ then can I use pyobject to interact with python module? From: Harshil Anil Kumar Shah Sent: Monday, December 19, 2011 3:32 PM To: 'Kyriakos Zarifis' Cc: nox-dev@noxrepo.orgmailto:nox-dev@noxrepo.org Subject: RE: [nox-dev] Nox messenger example for external c++ and nox python Thanks Zarifis... I looked at GUI example. It seems very useful. But in my case, client is external C++ module. So in that case do I have to use use messenger.cpp?? -Harshil. From: nox-dev-boun...@noxrepo.orgmailto:nox-dev-boun...@noxrepo.org [mailto:nox-dev-boun...@noxrepo.org] On Behalf Of Kyriakos Zarifis Sent: Monday, December 19, 2011 1:38 PM To: Harshil Anil Kumar Shah Cc: nox-dev@noxrepo.orgmailto:nox-dev@noxrepo.org Subject: Re: [nox-dev] Nox messenger example for external c++ and nox python Hi Harshil, it might not be the simplest example, but the GUI communicates with NOX using the messenger, so taking a look at that code might be a good starting point. Specifically, the file communication.py is responsible on the GUI side. Similarly on the NOX side, the code that uses the messenger to send messages to the GUI is inside the respective component that talks to the GUI. The component monitoring is one of them. Some of this is documented on the wiki here: http://noxrepo.org/noxwiki/index.php/NOX_GUI#Connecting_a_subview_to_a_NOX_component On Sun, Dec 18, 2011 at 10:41 PM, Harshil Anil Kumar Shah harshil_s...@infosys.commailto:harshil_s...@infosys.com wrote: Hi, I want to exchange messages between external C++ module and python module in Nox using protobuf messages. I browsed through couple of posts, I figured out I can use coreapps/messenger. Can I get some working example how messenger code can be used for message exchange between external c++ and nox python module. Regards, Harshil Shah, Convergence Lab, Infosys Labs Infosys | Bangalore Mob # : +91 97428 87966tel:%2B91%2097428%2087966. CAUTION - Disclaimer * This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended solely for the use of the addressee(s). If you are not the intended recipient, please notify the sender by e-mail and delete the original message. Further, you are not to copy, disclose, or distribute this e-mail or its contents to any other person and any such actions are unlawful. This e-mail may contain viruses. Infosys has taken every reasonable precaution to minimize this risk, but is not liable for any damage you may sustain as a result of any virus in this e-mail. You should carry out your own virus checks before opening the e-mail or attachment. Infosys reserves the right to monitor and review the content of all messages sent to or from this e-mail address. Messages sent to or from this e-mail address may be stored on the Infosys e-mail system. ***INFOSYS End of
Re: [nox-dev] NOX UnicodeDecodeError in nox/coreapps/pyrt/pyoxidereactor.py
Hi, I'm currently not in the office. Thanks for the logging hint. I will look further into that and keep you posted as soon as I'm back. My module is written in Python and does some minimal logging. Maybe there is the error. I will try to execute the same module in the old and working environment. Thank you very much! Bernd -- Diese Nachricht wurde von meinem Android-Mobiltelefon mit K-9 Mail gesendet. Murphy McCauley jam...@nau.edu schrieb: It looks like some Python component is trying to log something unprintable. Is your prrt module in Python? Does it do any logging? Is that the full stack trace that you pasted? It'd be nice to see where emit() was being called from. If you just want a quick fix, you could try just commenting out lines 337-339 in pyrt. But if this is happening because of something in monitoring or spanning_tree, I'd like to understand the problem better so that we could fix it. -- Murphy On Dec 20, 2011, at 4:50 AM, Bernd Wittefeld wrote: Hi, I have another problem with my NOX installation. When I start it using ./nox_core -i ptcp:6633 spanning_tree switch prrt monitoring it worked flawlessly all the time with the standard openflow switch from openflow.org in my old environment. Now I have moved to a new environment using an exact copy of the previous setup only with vmware installations, I have the following problem appearing in the NOX logs: Traceback (most recent call last): File ./nox/coreapps/pyrt/pyoxidereactor.py, line 339, in emit msg = unicode(msg, 'utf-8') UnicodeDecodeError: 'utf8' codec can't decode bytes in position 127-129: invalid data prrt is a module that I am currently working on. It does nothing with pyrt and stuff. Currently only gathering information from discovery and filling some datastructures. Does anyone know where this can come from? Do I miss some dependencies upon installation? It seems like NOX cannot understand the data it gets from a switch?! I have checked the configure scripts for dependencies and searched the web but could not find anything useful on this. Thanks in advance! Bernd _ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
Re: [nox-dev] Running nox with a pcap file as input
If I recall correctly, this is enabled or disabled automatically during configure based on whether the pcap header and/or library can be found. On Ubuntu, you should be good if you have... I think it's libpcap-dev installed. If you don't, please install it and then re-run configure. If you have the appropriate package installed and it still doesn't work, check the output of configure to see if there's anything useful about pcap in there. Hope that helps. -- Murphy On Dec 21, 2011, at 1:18 PM, Bharath Madhusudan wrote: I am just getting started with nox and before I throw real traffic at my setup, I would like to be able to use a pcap file as input. When I try: ./nox_core -i pcap:162.pcap:162.out I get: 1|openflow|ERR:pcap support not built in. Ensure you have pcap installed and rebuild Looking at the nox config files, its non-obvious to me how I would go about doing this Thanks a lot in advance for anything anyone might have to say about this. Regards, Bharath ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev ___ nox-dev mailing list nox-dev@noxrepo.org http://noxrepo.org/mailman/listinfo/nox-dev
