53 lines
1.4 KiB
Bash
53 lines
1.4 KiB
Bash
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#!/bin/sh
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# Version
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version=0.05
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# A simple script that checks for connectivity (including working DNS resolution)
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# If no connectivity, reset tethering
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#
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# Requires easytether-usb to be installed and already setup/working
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# Manual (one time) setting of the USB device ID of the tether device (TETHERDEV).
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# Find the tethering device with lsusb. Example (Samsung/Verizon kids tablet):
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# Bus 001 Device 013: ID 04e8:6860 Samsung Electronics Co., Ltd Galaxy (MTP)
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TETHERDEV=04e8:6860
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# 04e8:6860 is for Samsung's USB identification (both Note 10 and kids tablet)
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# Some highly available website to check (www.google.com is backed by *lots* of servers)
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CHECKWWW=www.google.com
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# How long before we check again?
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SLEEPITOFF=60
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while true; do
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lsusb | grep $TETHERDEV > /dev/null
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if (( $? )); then
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echo "Tethering device not found! Sleeping..."
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sleep 5s
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else
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echo "Tethering device present, continuing"
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break
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fi
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done
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while true; do
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curl --connect-timeout 10 $CHECKWWW > /dev/null 2>&1
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if [ $? != 0 ]; then
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# No internet
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echo "Network down, Houston we have a problem!" # FIXME: For debugging
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# Reset the USB device
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usbreset $TETHERDEV
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# Wait a few seconds for device to be ready again
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sleep 5s
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# (re)start easytether-usb to make a connection
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easytether-usb
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else
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# Internet working
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echo "Network up, all good in the hood!" # FIXME: For debugging
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fi
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sleep $SLEEPITOFF
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done
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