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07

Feb

2017

Another disrupted week, this time caused by a malfunctioning vehicle causing me to have to work from home for much of it.

Returned to polishing and improving my state machine generation code, mostly to deal with some minor inaccuracies when creating loops or converging branches. The machines are starting to look reasonably right, although I still need a good method for working out the best candidates to be start states.

Fixed some AMP matrix issues that cropped up when we rolled the latest code out to one of our deployments. The two main problems were that a) the throughput matrix hadn't been updated to the new API and b) the relative matrix metrics were inconsistent. As part of the process of fixing these, I also found that we've been calculating relative latency incorrectly for quite a while so I've fixed that as well.

02

Feb

2017

Spent the first part of the week putting the finishing touches to the AMP tutorial that Shane and I presented at NZNOG on Wednesday afternoon. Put in a lot of time making sure that the instructions we were providing were clear, that our hardware set up would work correctly, and that we had covered everything we needed to.

Spent the second part of the week in Tauranga at the NZNOG conference. Got really good feedback and enthusiasm from the AMP tutorial, and the speakers for the Thursday and Friday were rather interesting.

31

Jan

2017

NZNOG week. Spent the first two days finalising everything for the AMP tutorial.

The tutorial itself went ahead on Wednesday afternoon and seemed to be fairly successful. No major technical glitches and the participants seemed to get something out of it.

Gave my talk on my latest libprotoident study on Thursday. Happy with the reception I got and had quite a few interesting conversations afterwards as a result.

20

Jan

2017

Helped Brendon get the NZNOG AMP tutorial in a presentable state. Built some VM images that our attendees will be able to use as an AMP server and made sure that the steps provided in our tutorial will result in a functional server. As a result, we've fixed a few little bugs in ampy and amp-web that showed up in situations where you don't already have a lot of pre-existing streams or meshes.

Made sure that our VMs and instructions will work with VMWare, VirtualBox and QEMU, as well as on Ubuntu, Windows 10 and macOS.

Installed Ubuntu 16.04 on all of our UP boards, so they are all ready to go next week.

16

Jan

2017

Spent most of the week working on the AMP tutorial for NZNOG. Installed the base operating system on our example hardware and documented the instructions that users will need to follow to get a working AMP client install. Also installed a base VM image and documented the instructions for them to get a working server install as well. Found and fixed a couple of small bugs in the web interface while creating sample screenshots of how to add tests. Generated some sample test output for each of the tests and wrote up a few points of interest about each one.

Built new packages for Ubuntu Xenial based on the work done at the end of last year and the bugfixes from this week. Currently trying to decide which (if any) final configuration steps are best performed during package installation, or if they should be left to the user to perform manually.

16

Jan

2017

Spent a bit of time testing out some of Brendon's AMP tutorial instructions, making sure that everything so far is sane and no steps are missing. I anticipate there will be a lot more of this next week as the tutorial gets closer to a complete draft.

Continued working on verifying and fixing the auto-generated FSMs. Going over the entire set of generated FSMs from my test dataset threw up a number of bogus looking machines, so I've been working on investigating and (when necessary) fixing the problems. I've also managed to get self-repeating states working correctly for the most part; just one or two edge cases that still need to be detected and handled properly. Re-implemented tagging the original call logs with the FSMs that were matched by subsequences within the call log -- the current implementation is naive in that it assumes any state within a machine could be a start state, which is not going to scale well so I need to come up with a way to infer potential start states (or at least rule out definite non-start states).

Re-worked libflowmanager to be usable in a parallel situation. Previously, the flow map was a global variable. Now, you can have multiple flow maps so you can have one per thread and use libtrace's bidirectional hashing to ensure that each flow corresponds to only one thread, and therefore only one flow map.

Started experimenting with using parallel libtrace with libprotoident applications. I soon ran into a bug where using the built-in hasher thread to distribute packets could cause a deadlock, so spent most of Friday trying to track this down.

13

Jan

2017

This week I worked on my sack amp test, which requires a basic implementation of TCP to handshake and send a HTTP request so it has data to then send a selective acknowledgement. Got it to the stage where it can handle expected behavior.

I also spent time giving my sack test the ability to craft packets with data and with a larger range of options. This was done to be able to send HTTP requests and the sack option.

09

Jan

2017

Back to work for two days this week. Caught up on a pile of email, then wrote my talk for NZNOG later this month.

Tested and released a new version of libprotoident.

Started working on adding single node loops to my FSMs for the STRATUS project.

06

Jan

2017

Libprotoident 2.0.10 has been released.

This release includes rules to match new traffic patterns for many of the protocols that we introduced in the 2.0.9 release. We've also added two new protocols: BACnet and Maxicloud.

This release also no longer treats TCP keepalive packets as payload-bearing.

The full list of updated protocols can be found in the new libprotoident ChangeLog.

Download libprotoident 2.0.10 here!

19

Dec

2016

Tidied up and documented the FSM extraction code, so that I'll be able to remember how it works when I start working on it again in earnest next year.

Finished the matrix layout / selection changes and merged them back into develop. Hopefully we will get a chance to roll these out early next year once Brendon builds some new packages.

I had to run a test capture for a few days last week to make sure that some changes Richard had made to libtrace had not broken DAG and RT inputs. Ran the resulting traces through libprotoident to see if there are any new protocols worth investigating. Managed to make a few improvements to the rules for existing protocols to catch a few cases that we were missing but otherwise nothing particularly exciting cropped up.