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Exercises pyretic debugging: Difference between revisions
→Exercise: Pyretic Debugging
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'''HINT:''' You might have to use the "$ dpctl dump-flows tcp:127.0.0.1:6634" or "mininet> dpctl dump-flows" command frequently. | '''HINT:''' You might have to use the "$ dpctl dump-flows tcp:127.0.0.1:6634" or "mininet> dpctl dump-flows" command frequently. | ||
** In this debugging exercise, we take solutions available in the Internet for the gardenwall problem and try to fix bugs in it. | ** In this debugging exercise, we take solutions available in the Internet for the gardenwall problem and try to fix bugs in it. | ||
** The basic solution is taken from the Internet [https:// | ** The basic solution is taken from the Internet [https://projects.gwdg.de/projects/mayutan-public/repository/raw/courses/SDN/2017_2018_WS/exercises/pyretic_gardenwall_internetsolution1.py], test if it is able to block h1 when "infected". Note that we will only use the "infected == True" for this exercise. | ||
*** Copy the above code into /home/mininet/pyretic/pyretic/examples as pyretic_gardenwall_internetsolution.py | *** Copy the above code into /home/mininet/pyretic/pyretic/examples as pyretic_gardenwall_internetsolution.py | ||
*** start controller (in /home/mininet/pyretic folder): | *** start controller (in /home/mininet/pyretic folder): | ||
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* Now, check if the "exempt" case is working fine too (i.e if h1 is "infected" and "exempt", send it to h3 instead of blocking it) | * Now, check if the "exempt" case is working fine too (i.e if h1 is "infected" and "exempt", send it to h3 instead of blocking it) | ||
$ python json_sender.py -n exempt -l True --flow="{srcmac=00:00:00:00:00:01}" -a 127.0.0.1 -p 50001 | $ python json_sender.py -n exempt -l True --flow="{srcmac=00:00:00:00:00:01}" -a 127.0.0.1 -p 50001 | ||
** (Extra: Not Needed): Try fixing [https:// | ** (Extra: Not Needed): Try fixing [https://projects.gwdg.de/projects/mayutan-public/repository/raw/courses/SDN/2017_2018_WS/exercises/pyretic_gardenwall_internetsolution.py this] code for the "infected" case. | ||