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out.alice.it Delivery Failed and MX records

by ao2, March 18, 2011
in

I was getting messages like the following form the MTA of my ISP(Alice/Telecom Italia) when sending email to some addresses:

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The IPv6 Greeter Drupal module

by ao2, February 15, 2011
in

I've added an IPv6 Greeter block on ao2.it in order to greet the IPv6 users, and to inform the others about the existence of the new protocol.

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ao2.it backstage: IPv6 enabled

by ao2, February 8, 2011
in

ao2.it is now IPv6 enabled, in the last two months two things finally happened that made this possible:

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Short URL links with Drupal 6 on ao2.it

by ao2, January 13, 2011
in

Added short URL links to ao2.it, you will find one at the end of each node content.

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On RAI, access neutrality, and how to download Smooth Streaming content

by ao2, December 27, 2010
in

RAI, the Italian public radio/TV broadcaster, is using Silverlight and Smooth Streaming to serve most of the media content on its website, Smooth Streaming is the Microsoft interpretation of Adaptive Streaming technology over HTTP, which was firstly introduced by Apple for its mobile platform; check out the IIS Smooth Streaming Technical Overview for further details on Smooth Streaming.

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Kinect linux kernel driver

by ao2, December 6, 2010
in

It looks like Santa came early this year.

KernelLabs sponsored me for a Kinect sensor device unit so I can experiment writing a Linux kernel driver for it.

So in the next weeks I'll be working on a gspca driver for this device. For now the code is going to be hosted in the gspca_kinect repository, as an out of kernel module, this will ease compile/test cycle; if it comes out that changes are needed to gspca itself, then I'll decide whether hosting these changes as patches, or switching to a kernel clone repository; suggestions will be welcome. The driver is working already, but currently you can just use the sensor as a normal WebCam.

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Write a wav header, in C and python

by ao2, November 23, 2010
in

I had this raw audio stream in a file, with no header, just the encoded data, but I knew the data properties from somewhere else than the file; in order to make any media player to recognize and play the audio data I decided to rebuild a WAV header for it, that worked fine, even for a compressed audio format.

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Bug hunting in Linux kernel land: an unpretentious primer

by ao2, November 2, 2010
in

Lately I've been fixing some defects in the hidraw interface in the Linux kernel (commits d20d5ff and e42dee9), simple issues like these NULL pointer dereference are a good example to show how to analyze a Linux bug trace in order to spot the defective code. So let's take a look.

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drush grep, search raw content in drupal with regular expressions

by ao2, October 16, 2010
in

I was looking for a way to search raw content (before input filters are applied) in my Drupal blog using regular expressions, à la grep; I googled to see what other people had come up with to solve the same problem and I found an article about Searching the Drupal Database by Regular Expression, which pointed also to the scanner module, however those solutions have both some limitations: ad-hoc Drupal scripting, only MySQL supported, and I didn't want to have a module installed for that anyways; so I tried the Drush way and I found it the most convenient one.

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List header files first in a patch with git

by ao2, October 14, 2010
in

When submitting a patch for review we want our readers/reviewers to be able to read it as easily as possible, and when you make changes to code involving some definitions in a header file you definitely want header files to be listed first in the patch, so that the reader can follow the changes to the code logic knowing already the new definitions.

Changing the order of files in a patch can be done very easily using the -Oorderfile option offered by some git commands.

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