Daniel’s weekly report

November 25, 2022

feature freeze

We entered feature freeze this week for curl, so there is no more new features or “changes” merged now until after the coming release due to happen on December 21. Now is the bugfix-only season. We already count 82 bugfixes landed in master since the last release queued up for 7.87.0.


I have reserved two new CVE Ids for two confirmed curl vulnerabilities. This week I wrote up the patches and the first security advisory drafts for them, but as they will get published in sync with the pending release there is no hurry and I have a little more time to polish my wording.


On Thursday, I attended a local meetup here in Stockholm and talked about curl for maybe 70 persons and it was a blast. Lots of good questions followed and there were several friendly conversations in the pub we continued at after the presentation.

I was asked to participate in at least five selfies after my talk. More than I have ever done before and a kind of attention I am not used to…


I turned yet another year older this week. I have now officially worked on curl and its precursors during half of my life.

Blog posts

Coming up

  • Reduce the number of known bugs
  • A write-up on how curl can/should support HTTPS DNS records

November 18, 2022


While my mission right now is to reduce the amount of known bugs, this week has been more in the spirit of making sure we don’t add more bugs to that list as I’ve mostly worked on merging PRs and fixing issues. The feature window closes next week so I consider it a courtesy to try to merge most of the fine-looking PRs before then, and then ramp up my bug-fixing after that.

Right now it looks like there might not be any more changes merged for the next release.


While the audit is completed, we had a meeting with Trail of Bits to discuss the final steps and eventual publication date. I worked on documentating how we have dealt with each and every one of the remarks in the report. Right now we are aiming at doing it in sync with the next release: on December 21.


I did an interview on Wednesday with a German tech reporter discussing the Sovereign Tech Fund’s curl funding and what it means for the project. I’ll link you when it goes live. Yes, it will be in German.


I participated/recorded a video podcast episode of Fairlight TV talking a lot about my early Commodore C64 days and background doing demo programming, in addition to more modern things like curl and getting the Polhem Prize.


I have booked and made arrangements to attend FOSDEM 2023 in Brussels in February 2023; my favorite conference. I have not proposed a talk this year, but this is mostly because I have not really felt inspired or found a suitable topic and room. If you have a good idea for something I could contribute with there that isn’t a complete rerun of other talks I’ve done in FOSDEM already, let me know.

Blog posts

Coming up

  • Feature window closing on Wednesday
  • curl is everywhere presentation on Thursday in Stockholm


Comment here

November 11, 2022

Known bugs reduction

This is my funded project, and I have already managed to get a few items removed from the list. I have officially started, and I can already now sense that there is going to be work to just avoid adding new issues to the list, let alone shrinking the list as much as I want to.

connection filters

Stefan took a deep dive immediately when he started his h2 and h3 related curl projects and he decided that what better way could there be than rewriting lots of internals? His new concept of “connection filters” lays the foundation of further changes in the protocol implementations going forward. I might need to write up a separate blog post soon about what exactly this is and what it means for curl internals. It is an internal refactor only that brings no externally visible changes.

We merged his work into master just today, Friday.


We had another security issue reported and we now have two of them being worked on lined up for the next release. Both look like they are CVE material.

The final security audit report from Trail of Bits has still not been delivered to us, but I hear it will happens soon. Once we know we have dealt with any security-related issues mentioned in it, we will make it public.


The decision to not do a quick early patch release proved to be sensible as it turned out there were more issues left to get fixed in the noproxy regression of last week. I hope functionality is now finally restored properly.


The IETF 115 meeting happens in London this week and I already before decided to only participate from remote. However, when I was about to join the first (out of two) meeting on Monday I realized I had to pay more than 100 USD per meeting just to attend via video. I consider that a ridiculously steep price and as a result I decided to not attend. I will instead rely on that all major outcomes or discussions will show up on the mailing list sooner or later.


I too am of course over on Mastodon much more now as Twitter seems to be death-spiraling into the abyss.


I attended the Polhem Prize awards ceremony and dinner on Wednesday. I got to use my suit and bow-tie and had a great evening. This year’s winner is a software person: Staffan Gestrelius (page in Swedish). It has now been five years since I got the award.


My getting started with libcurl webinar on Thursday went well. I have done one before on the same topic, but this was a re-edited and improved version. We should have a YouTube version of this up soon.

Blog posts

Coming up

  • Reduce the number of known bugs
  • Improve websockets
  • Sweep away obstacles for Stefan
  • Participate in a podcast


Comment here

November 4, 2022

HTTP Workshop

After three blog posts about it this week I don’t think I can add much more about the Workshop. This week was all about that, with us talking HTTP over drinks until late several night. An intense massive HTTP overdose that has really made my brain soft by the end of the week. Can recommend!

curl feature window

While I have been neglecting several of my duties this week, I did manage to formally open the curl “feature window”. This means that we now allow the merging changes and new feature for the pending next curl release.

A regression in curl’s NO_PROXY handling was reason for a minor debate if we should perhaps rather do an early patch-release instead of opening the feature window, but ultimately we decided the bug is not that bad. It also gives us plenty of time to make sure we fix it correctly.

Blog posts

Coming up

  • The Polhem Prize awards gala dinner on Wednesday


Comment here

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