webassembly

All posts tagged webassembly

webrtcH4cKS: ~ How Zoom’s web client avoids using WebRTC (DataChannel Update)

Posted by Philipp Hancke on September 8, 2019
Posted in: Reverse-Engineering.
Tagged: , , , , , .
3 comments

Editor’s Note: This post was originally published on October 23, 2018. Zoom recently started using WebRTC’s DataChannels so we have added some new details at the end in the DataChannels section.

Zoom has a web client that allows a participant to join meetings without downloading their app. Chris Koehncke was excited to see how this worked (watch him at the upcoming KrankyGeek event!) so we gave it a try. It worked, removing the download barrier. The quality was acceptable and we had a good chat for half an hour. ...  Continue reading

webrtcH4cKS: ~ Finding the Warts in WebAssembly+WebRTC

Posted by Philipp Hancke on April 11, 2019
Posted in: Reverse-Engineering, Technology.
Tagged: , , , .
4 comments

A while ago we looked at how Zoom was avoiding WebRTC by using WebAssembly to ship their own audio and video codecs instead of using the ones built into the browser’s WebRTC.  I found an interesting branch in Google’s main (and sadly mostly abandoned) WebRTC sample application apprtc this past January. The branch is named wartc… a name which is going to stick as warts!

The repo contains a number of experiments related to compiling the webrtc.org library as WebAssembly and evaluating the performance. From the rapid timeline, this looks to have been a hackathon project. ...  Continue reading