Fun with userspace AppleTalk

I didn’t see one called that, but I did try turning off a bunch of extensions including one called Foreign File Exchange. Now the PHOTO_CD request is gone which is good, but Mac OS still locks up so seems like that was a red herring. Definitely think it’s some rogue extension now
 
The malformed packets may be a problem... or not. Gotta love the lack of error handling in classic MacOS though. When trying to root out bugs in Netatalk, I've found it helpful to do packet traces using one of Apple's AFP servers to see how the communication should progress. The built-in file sharing in System 7+ should be fine for this.

I also have a wide variety of clients on hand since they have their fair share of bugs too. For example, ASC 3.7.x has some quirks in its DSI implementation.
 
At this point I dont _think_ I have any malformed ones left. The only one I am unsure about is FPGetSrvrMsg - Even though that should only be in AFP 2.1 and I am only advertising AFP2.0 and under it still seems to send it. Wireshark seems happy about what I am sending, though.

But yes I think you're right - I have a B&W G3 desktop I should fire up and just capture the conversation between the two to see what I might be doing wrong
 
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