CHIRP

#! /bin/bash

# Copyright (c) 2019 Dan Clemmensen, licensed to you under GPL v3.

# 

# find the correct USB serial port device and run tshark on its usbmon,

# to capture the interactions into cap.pcap.

# this script take one parameter: the device id (as 4 hex digits).

# for example one Prolific device has an ID of 067b

# We use this apporach because the bus and device numbers can

# change when you plug and unplug the USB connector.

#

# must run as root

# 

devstr=$(lsusb -d $1: | tr -d ":")

words=( $devstr )

bus=${words[1]#0}

dev=${words[3]#0}

bus=$(($bus - 0))

echo " Starting capture on USB$bus, device $dev"

tshark - i usbmon$bus -w cap.pcap