This is just a minimal PoC for an "interesting" idea.
I just changed USB_CFG_VENDOR_ID and USB_CFG_DEVICE_ID in the usbconfig.h file
to emulate an ICOM-7300.
Sniff traffic generated by WSJT-X:
socat /dev/ic7300,raw,echo=0 \
SYSTEM:'tee in.txt | socat - "PTY,link=/tmp/ic7300,raw,echo=0,waitslave" | tee out.txt'
hexdump in.txt
This technique works! :)
Credit: https://unix.stackexchange.com/questions/12359/how-can-i-monitor-serial-port-traffic