GNU Radio / SDR

Today, I was happy to merge pull-request from Jonathan Brucker that added RFtap support to some of my OOT modules. RFtap bridges the gap between SDR transceivers and network monitors like Wireshark.

In a nutshell, it reads metadata (like encoding, SNR, or frequency offset) from the receiver and makes it available to the monitoring software. What’s really great is that RFtap can be extended with custom dissectors. In this blog post, Jonathan describes how he connect my gr-rds transceiver to Wireshark.

Note that while there is something very similar available for WiFi (the Radiotap header), RFtap is more flexible and allows adding more fine-grained information.