daniel.haxx.se

Together with friends in OWASP I’m happy to mention that we will do an event on January 31st on the topic “HTTP security, websockets and more” where I’ll talk. Starting at 17:30, the exact location is not decided yet and it’ll depend a bit on popularity, but it will be in Stockholm, Sweden.

The two other speakers to appear at the event are, apart from myself, John Wilander and Martin Holst-Swende. My part of the session will be about the WebSockets protocol, about the upcoming cookie RFC and some bits about the ongoing HTTPbis work.

Sign up to attend, the opportunity is only open one week.

Omegapoint will sponsor with something to eat and drink, and we do plan to go out and grab a beer afterwards and continue the discussion.

See you!

[continued from FSCONS 2010 day 1]

With the previous night’s social event ending fairly late and involving a fair amount of good beers, it was nice to be able to sleep in a bit and have one of those great hotel breakfasts in a slow and relaxed manner.

I then checked out from the hotel and walked over to the venue, this time not as mislead by google maps’ directions as I was yesterday.

The economics of open innovation and FOSS. was the first session I attended and the talker Karthik Jayaraman did a good job of explaining and showing how things can happen fast and why and he did some interesting predictions of the future.

I followed Kathik’s talk in the same room with my 30 minute session Future transports in which I discussed and explained a bit about transport protocols today and what might come tomorrow.

Glyn Moody is a bit of a celebrity (he has for example written several books) and you can tell he’s done this before. He’s an excellent speaker and as he’s a native English person he has a bit of an edge compared to most speakers at this conference. Mr Moody got the biggest room at FSCONS filled up to the last available chair and there were still a bunch who had to sit on the floor.

Glyn talked about Ethical Monopolies, the history of patents and copyright and how they have changed and how they today no longer are even close to having the purposes they were created for.

He advocates that we stop talking about “Intellectual Properties” but instead refer to them as “Intellectual government-granted monopolies” as that is a much better use of words when these subjects are brought up. The ordinary person thinks people should be able to keep properties, but would in many cases object to (more) monopolies.

The last session I got to enjoy this year was Mikael von Knorring’s “Who are the free users” which did present a good view of things but I wasn’t very focused during the talk so I’ll refrain from judging it in any direction.

I took a last stroll over to the cafeteria area where I found some friends, said hello and good bye and then I took off towards the train station and my 3+ hours train ride back to Stockholm on the other coast of Sweden. (It could be noted that I left early, there were at least two session slots that I missed.)

My head is packed with impressions. I met lots of great people and friends, both old and many new ones. We had awesome discussions and I hope at least some of the ideas that were brought up will be turned into reality. I will post more about those here if/when they happen.

The future for Free Software (in the Nordic region) is bright!

At FSCONS 2010 I had the pleasure to do a talk about how to make your client-side networking applications really scale when upping the number of simultaneous connections. Including some details that libcurl will support you all the way!

My talk was named “Scalable application layer transfers” and the slides from it is available online. See below. Hopefully the video recording of it will appear later and I’ll post a  follow-up then. A little extra bonus material as background would be my poll vs select vs event-based article.

As I mentioned in a previous post, the room was shock full when I started preparing my equipment for the talk since the session before me was a keynote, but by the time I actually starter presenting there were only the limited set of hardcore geeks left.

In the FSCONS program there were several talks over the weekend about women in FOSS and so on, while I on the other hand certainly only contributed to enforcing the stereotypes by being white, male, middle-aged, very techy and I delivered my two speeches for audiences in which I believe not a single woman attended. Whether I am part of the problem or the solution we can discuss in a separate post later on…

07:02: The alarm of my mobile never rang, because I was already up. I got to play with my two kids a while before the taxi arrived to pick me up at 07:30.

The X2000 train from Stockholm to Göteborg took off exactly on schedule and we were off. I learned that the on-board Internet service wasn’t possible to sign on to with Chrome but I had to fire up my good old Firefox for it. Going with first class X2000 offer free Internet all the way, and free coffee. Two of my favorite frees.

The train arrived only 10 minutes late in Gothenburg. I took a taxi over to my hotel, checked in, put my smaller laptop in my backpack and walked over to the FSCONS venue.

After having had lunch and caught up with some friends, I sat down in the big audience listening to the presentation about the Inhana project, by Kyrah. Interactive storytelling and about helping female artists in Syria to play/work with technology in the form av Arduino boards.

Kyrah had the room full. Not that many remained when I entered the stage after her and did my talk on scalable application layer transfers.

I followed up with a cup of coffee after some private discussions on SCTP and how to do fast transfers in the Tor project and then I headed towards the talk about data structures in the Linux kernel by Allesandro Rubini.

Mr Rubini is a long-time involved Linux kernel hacker (and well known co-author of the Linux Device Drivers bible) and in a very casual and effective style he taught us how we can use regular Linux code for lists and trees in a GPL licensed project and how the clever container_of macro works. To me, its biggest drawback is that it relies on a gcc-specific feature: typeof(), but otherwise it is a beautiful craftsmanship.

Allesandro brought down the biggest spontaneous applause when he responded to someone’s question “but couldn’t you also do this using templates in C++?” by suitably and appropriately bashing C++…

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Anders Arnholm followed along in the embedded track and he talked about using Linux in the automotive world and I think many of us thought the best part of his talk was the numbers and comparisons he had when trying different flash file systems to increase boot performance and really cut down startup time to a minimum. The initial kernel startup time was 6 something seconds when using JFFS2 and they managed to get down to below 200 milliseconds with the use of the AXFS (Advanced XIP Filesystem, where XIP is short for execute in place).

… after Anders’ talk I followed the crowds, got a seat in a bus and we were transported over to the social event. I mentioned a little bit about that in my previous post, the award for me.

My FSCONS 2010 day 2 entry will be posted within shortly.

As a session during the Internetdagarna conference (orginized by .SE), Björn Stenberg, Daniel Melin and I joined up to talk about open source with the title “Living With Open Source” (”Att Leva med Öppen Källkod” in the language of the brave: Swedish) on October 27. We did a 90 minute session split up between the three of us. The session was in Swedish and it was recorded so I expect that it will be made available online soon for those who are curious but didn’t attend.

Björn (on the picture above) started off by talking about how to work with Open Source as a user when using Open Source components. How to deal with changes, sending upstream, the cost of keeping changes private etc.

Daniel Melin continued and talked about open source licensing. It is quite clearly an area that people find tricky and mysterious, judging from the many questions that followed. I think large parts of the audience wasn’t very advanced or well versed into open source details so then of course there is a lot to learn and to talk about. I think we all felt that we tried to cover quite a lot that together with the questions was hard to fit within the given time.

I ended our triplet by talking about open source from a producer’s viewpoint, how we view things in a typical open source project and I used a lot of details and factual points from the cURL project.

The audience consisted of perhaps 50 people. We had a rather nerdy subject and we had tough competition from five other parallel sessions, with some of them featuring Internet and other local celebrities.

Over all, I think we did good. The idea that held our three talks together I think was fine, we kept the schedule pretty good, the audience seemed to enjoy it and I had a great time. And we got a really nice lunch afterwards!

As mentioned before, I visited the event arranged on Software Freedom Day 2010 here in Stockholm Sweden by the Swedish Linux Foundation (Svenska Linuxföreningen). There, I did a one hour talk in Swedish about how we reverse engineer mp3 players in the Rockbox project, and then I ventured in and told them about Rockbox, what it is and what it does etc. I’ve done basically this talk before. I got lots of good questions and general feedback; I believe the audience mostly appreciated it.

I’ll be brief:

On the Software Freedom Day 2010 (September 18th), the guys in “The Swedish Linux Association” (Svenska Linuxföreningen) are organizing a day with talks and presentations about Linux and foss related subjects, which they call Linuxträff 2010. It takes place in Stockholm city, Sweden.

At that event, in the 11:00 – 12:00 time slot, you will be able to see and hear me do a little talk about Rockbox and reverse engineering to get free software on consumer electronics.

See you there!

Recently I was informed that I got two talks accepted to the FSCONS 2010 conference, to be held in the beginning of November 2010.

My talks will be about the Future and current state of internet transport protocols (TCP, HTTP, SPDY, WebSockets, SCTP and more) and on High performance multi-protocol applications with libcurl, which will educate the audience on how to use libcurl when doing high performance clients with potentially a very large number of simultaneous transfers. A somewhat clueful reader will of course spot that these two talks have a lot in common, and yeah they do reveal a lot of what I do and what I like and what I poke on these days. I hope I’ll be able to put the light on some things not everyone is already perfectly aware of.

The talks will be held in English, and if the past FSCONS conferences tell anything, my talks will be video filmed and become available online afterward for the world to see if you have a funeral or something to attend to that prevents you from actually attending in person.

If you have thoughts, questions or anything on these topics that you would like to get answered in my talk, feel free to bring them up and I’ll see what I can do.

(If those fine guys and gals at FSCONS ever settled for a logo, or had one I could link to, I would’ve shown one of them right here.)

30 minutes is a tricky period to fill with contents when you do a talk, and yesterday I did my best at confusing/informing the audience at the OPTIMERA STHLM conference in transport layer performance. Where time is spent or lost today in TCP, what to think about to get things to behave faster, that RTT is not getting better even though brandwidth is growing really fast these days and a little about some future technologies like WebSockets, SPDY, SCTP and MPTCP.

Note: this talk is entirely in Swedish.

My slides for this is also viewable with slideshare.net like this:

Yes, I’m very happy to say that our good friends at .SE (who run and admin the .se TLD and more) like FOSS a lot and they are organizing Swedish perhaps biggest conference on internet-related stuff annually in October: Internetdagarna. This year, they’ve reached out to cooperate with us – the foss-sthlm foss network – to arrange and hold a meeting of our own during the conference.

The foss-sthlm meeting will not be within the actual conference, but will be held just next door. We intend to hold the meeting admission-free just as before – the way we like! I hope and think that we will be able to arrange another kick-ass meeting then and with .SE’s help we will get the arrangements done in style. I just very well may end up doing a talk myself at that meeting. (We call that meeting #4 for now, but it’s by no means decided that it actually will end up being the forth one this year.)

Let me again just mention that foss-sthlm is no formal organization and it has no leaders and no actual members. We’re all just individuals. However, I work to get things to happen within the network and I thus sometimes appear to “speak for” us, although in the end I of course only speak for myself and I help out to arrange things that I hope others will appreciate as well.