confirm working on clara-bw as of fw 4.39.23027 / linux 4.9.77

clara-bw/README.md

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+# Kobo Libra Color
+
+## Modules
+Tailscale requires the TUN/TAP device driver to be loaded to function.
+This is included in the Libra Color kernel though
+
+# iptables
+Tailscale requires the `iptables` binary and shared libraries to be present on the device to function.
+These are not included in the stock Kobo Libra Color image so this repo provides it as 
+pre-built binaries/libraries in the `binaries` directory.
+
+This was pulled from the [July 5th 2017 build of Raspbian](http://downloads.raspberrypi.org/raspbian/images/raspbian-2017-07-05)
+which also bundles the source code. This was done to match the glibc version used in the Libra Color image.

clara-bw/install-tailscale.sh

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+#!/bin/sh
+
+set -e
+
+# Set what version of tailscale you would like to install here.
+# You can find the latest version at https://pkgs.tailscale.com/stable/#static
+export TAILSCALE_VERSION=1.72.1
+
+echo
+echo "Installing tailscale ${TAILSCALE_VERSION} for Kobo Clara BW!"
+uname -a
+echo
+
+echo "Installing iptables into /sbin and /lib ..."
+cp binaries/iptables/sbin/* /sbin
+cp binaries/iptables/lib/* /lib
+
+ln -sf /sbin/xtables-multi /sbin/iptables
+ln -sf /lib/libxtables.so.10.0.0 /lib/libxtables.so.10
+ln -sf /lib/libip4tc.so.0.1.0 /lib/libip4tc.so.0
+ln -sf /lib/libip6tc.so.0.1.0 /lib/libip6tc.so.0
+
+echo "Downloading tailscale_${TAILSCALE_VERSION}_arm.tgz from pkgs.tailscale.com ..."
+wget https://pkgs.tailscale.com/stable/tailscale_${TAILSCALE_VERSION}_arm.tgz
+tar -xvf tailscale_${TAILSCALE_VERSION}_arm.tgz
+
+echo "Installing tailscale binaries into /mnt/onboard/tailscale and symlinking them into /usr/bin ..."
+mkdir -p /mnt/onboard/tailscale
+mv tailscale_${TAILSCALE_VERSION}_arm/tailscale /mnt/onboard/tailscale
+mv tailscale_${TAILSCALE_VERSION}_arm/tailscaled /mnt/onboard/tailscale
+
+# Symlink tailscale binaries to /usr/bin
+ln -sf /mnt/onboard/tailscale/tailscale /usr/bin/tailscale
+ln -sf /mnt/onboard/tailscale/tailscaled /usr/bin/tailscaled
+
+echo "Cleaning up tarball ..."
+rm -rf tailscale_${TAILSCALE_VERSION}_arm
+rm -rf tailscale_${TAILSCALE_VERSION}_arm.tgz
+
+echo "Installing tailscale boot and load scripts into /usr/local/tailscale ..."
+mkdir -p /usr/local/tailscale
+cp scripts/* /usr/local/tailscale
+
+echo "Installing tailscale udev rule into /etc/udev/rules.d ..."
+cp rules/* /etc/udev/rules.d
+
+echo
+echo "Installation complete! Attempting to boot tailscale daemon ..."
+/usr/local/tailscale/boot.sh
+echo
+
+echo "If no errors were reported, tailscale should be installed!"
+echo "You can now configure tailscale by running 'tailscale up' and following the instructions."
+echo "The tailscale binaries are located in /mnt/onboard/tailscale."
+echo

clara-bw/rules/98-tailscale.rules

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+KERNEL=="loop0", RUN+="/bin/sh -c '/usr/local/tailscale/boot.sh'"
+KERNEL=="wlan*", ACTION=="add", RUN+="/bin/sh -c '/usr/local/tailscale/on-wlan-up.sh'"
+KERNEL=="wlan*", ACTION=="remove", RUN+="/bin/sh -c '/usr/local/tailscale/on-wlan-down.sh'"

clara-bw/scripts/boot.sh

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+#!/bin/sh
+
+# Start by renicing ourselves to a neutral value, to avoid any mishap...
+renice 0 -p $$
+
+# Launch in the background, with a clean env, after a setsid call to make very very sure udev won't kill us ;).
+env -i -- setsid /usr/local/tailscale/on-boot.sh &
+
+# Done :)
+exit 0

clara-bw/scripts/on-boot.sh

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+#!/bin/sh
+
+# Make sure to load the TUN kernel module and create the /dev/net/tun device
+if [ ! -c /dev/net/tun ]; then
+  mkdir -p /dev/net
+  mknod /dev/net/tun c 10 200
+fi
+
+# Make absolutely sure that iptables is in the PATH
+export PATH=/usr/sbin:/usr/bin:$PATH
+
+# Make sure /mnt/onboard is mounted
+timeout 5 sh -c "while ! grep -q /mnt/onboard /proc/mounts; do sleep 0.1; done"
+if [[ $? -eq 143 ]]; then
+    exit 1
+fi
+
+case "$(pidof tailscaled | wc -w)" in
+0) tailscaled --statedir=/mnt/onboard/tailscale &> /tailscaled.log &
+   ;;
+esac
+
+exit 0

clara-bw/scripts/on-wlan-down.sh

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+#!/bin/sh
+tailscale down

clara-bw/scripts/on-wlan-up.sh

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+#!/bin/sh
+tailscale up

clara-bw/uninstall-tailscale.sh

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+#!/bin/sh
+
+echo "Uninstalling tailscale..."
+
+pid=$(pgrep tailscaled)
+if [ -n "$pid" ]; then
+  echo "Terminating tailscale daemon with PID $pid ..."
+  kill -15 "$pid"
+
+  # Wait a little bit for the daemon to terminate cleanly.
+  sleep 3
+
+  echo "Tailscale daemon terminated successfully."
+fi
+
+echo "Removing iptables binaries from /sbin and /lib ..."
+rm -f /sbin/xtables-multi /sbin/iptables
+rm -f /lib/libxtables.so.10 /lib/libip4tc.so.0 /lib/libip6tc.so.0
+
+echo "Removing tailscale binaries from /mnt/onboard/tailscale and /usr/bin ..."
+rm -rf /mnt/onboard/tailscale
+rm -f /usr/bin/tailscale /usr/bin/tailscaled
+
+echo "Removing tailscale boot and load scripts from /usr/local/tailscale ..."
+rm -rf /usr/local/tailscale
+
+echo "Removing tailscale udev rule from /etc/udev/rules.d ..."
+rm -f /etc/udev/rules.d/99-tailscale.rules
+
+echo "Uninstallation complete!"