Cyber:Bot- Sniffer attack and defenses

dh015

My student and I are on the section of this lesson called "Try this: Sniffing without Errors" We cannot seem to figure out the code to get the sniffer to give the response on this page: https://learn.parallax.com/tutorials/language/python/cybersecurity-sniffing-attacks-and-defenses/share-something-personal-0

Any help would be greatly appreciated.

Andy Lindsay (Parallax)

The first image on that page does not look correct to me. At that point in the lesson, the Transmitter and Intended Receiver terminals do look correct. On the other hand, the Sniffer terminal should be displaying KDSSB and other similarly unintelligible strings. Is that what you are seeing?

Andy Lindsay (Parallax)

I just updated the image. The Sniffer terminal should now show KDSSB, VDG and DQJUB. If it doesn't, try your browser's refresh button. If the updates still don't show, Google search for "cacheless refresh" followed by your browser's name. Example: cacheless refresh chrome

Thanks for bringing this to our attention.

dh015

@"Andy Lindsay (Parallax)" said:
The first image on that page does not look correct to me. At that point in the lesson, the Transmitter and Intended Receiver terminals do look correct. On the other hand, the Sniffer terminal should be displaying KDSSB and other similarly unintelligible strings. Is that what you are seeing?

No. Code and serial attached.

Andy Lindsay (Parallax)

The except statement cannot stand on its own; it needs to be preceded by a try statement that "tries" to execute some statements that might throw an exception. The specific page in exception handling where this is demonstrated is:

https://learn.parallax.com/tutorials/robot/cyberbot/exception-handling-primer/make-script-handle-exceptions/try-add-exception

Also, add the display.show(getattr(Image, packet)) inside the try: statement so that your except statement will print the message you are expecting.

dh015

@"Andy Lindsay (Parallax)" said:
The except statement cannot stand on its own; it needs to be preceded by a try statement that "tries" to execute some statements that might throw an exception. The specific page in exception handling where this is demonstrated is:

https://learn.parallax.com/tutorials/robot/cyberbot/exception-handling-primer/make-script-handle-exceptions/try-add-exception

Also, add the display.show(getattr(Image, packet)) inside the try: statement so that your except statement will print the message you are expecting.

Still something wrong. Nothing displays on the sniffer and the below is what I have and see in the serial.

Shawn Lowe

No the try goes before the except. It's the routine portion tries when it falls out of the while loop

dh015

@"Shawn Lowe" said:
No the try goes before the except. It's the routine portion tries when it falls out of the while loop

Well, I got the two lines I was supposed to get but I did not get it to continue to handle the exception continuously.