benoithiller / gini

GINI: User Level Networking Toolkit

About Me

• I wrote a http server in bash at one point. Let me know if you can think of a good way to get chunked encoding to work as the fun part is being able to connect it to pipes, but chunked encoding requies handling strings with \0...
• Genuinely eager to hear criticism of my work. A big part of being able to learn and improve is making sure that I can always see many flaws in myself and my code to chip away at. I would love your help.

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gini's Issues

Opening a topology over the current one causes hang and corruption

If you attempt to open a saved topology while you have one open, you get a Nonetype error and the program hangs.

Selecting to save the open topology when prompted results in a trashed save file.

The following image shows the trashed file and the error

Network with switch tree and no router does not start

There is no expected behaviour for this case and as such the networks fail. The UMLs attempt to set themselves up with the non existent gateway.

The expected behaviour is that the UMLs are created without a gateway and the network acts as it would in such a case. Meaning that all non local destinations are considered unreachable.

Image of the issue is attached.

Scons install fails on gloader.dtd

The debug output makes the problem fairly obvious. The installer is putting the dtd in share/gini/gloader but expecting it in etc/.

Install file: "backend/src/gloader/gloader.dtd" as "usr/share/gini/gloader/gloader.dtd"
gen_environment_file(["usr/bin/gloader"], ["usr/lib/gini/gloader/gloader.py"])
chmod +x /home/notroot/src/gini13/usr/bin/gloader
gen_environment_file(["usr/bin/gserver"], ["usr/lib/gini/gloader/gserver.py"])
chmod +x /home/notroot/src/gini13/usr/bin/gserver
scons: *** [install-gloader] Source `usr/etc/gloader.dtd' not found, needed by target `install-gloader'.

Router connectivity issues

Dependent on the order in which elements are placed routers will not be able to bring up some of their interfaces.

Apparently it may also be in part "random"

Example 1

in the following the router 1 to router 2 link (via subnet 2) is down

However with the subnets reordered(and possibly the order of connection changed) in the following network the same connection works

Example 2

The broken network, with several inter router connections having issues.

Working Versions

The second working version has yet another ordering of subnets.

Networks with multiple paths between routers fail

You are unable to connect two routers via multiple paths without getting an error.

Example of error message

Network to reproduce