From a55d29aab972a6fe205a3b3db10e869bb032e613 Mon Sep 17 00:00:00 2001
From: Adyanth H <33192449+adyanth@users.noreply.github.com>
Date: Mon, 18 Jan 2021 17:37:09 +0530
Subject: [PATCH] :tada: Initial commit

---
 etc/init.d/tailscale         | 32 +++++++++++++++++++++++++++++++
 etc/init.d/tailscale_enabler | 10 ++++++++++
 tailscale_enabler_README.md  | 37 ++++++++++++++++++++++++++++++++++++
 usr/bin/tailscale            |  1 +
 usr/bin/tailscale_enabler    | 20 +++++++++++++++++++
 usr/bin/tailscaled           |  1 +
 6 files changed, 101 insertions(+)
 create mode 100644 etc/init.d/tailscale
 create mode 100644 etc/init.d/tailscale_enabler
 create mode 100644 tailscale_enabler_README.md
 create mode 120000 usr/bin/tailscale
 create mode 100644 usr/bin/tailscale_enabler
 create mode 120000 usr/bin/tailscaled

diff --git a/etc/init.d/tailscale b/etc/init.d/tailscale
new file mode 100644
index 0000000..2fe6008
--- /dev/null
+++ b/etc/init.d/tailscale
@@ -0,0 +1,32 @@
+#!/bin/sh /etc/rc.common
+
+# Copyright 2020 Google LLC.
+# SPDX-License-Identifier: Apache-2.0
+
+USE_PROCD=1
+START=99
+STOP=1
+
+start_service() {
+  procd_open_instance 
+  procd_set_param command /usr/bin/tailscaled
+
+  # Set the port to listen on for incoming VPN packets.
+  # Remote nodes will automatically be informed about the new port number,
+  # but you might want to configure this in order to set external firewall
+  # settings.
+  procd_append_param command --port 41641
+
+  # OpenWRT /var is a symlink to /tmp, so write persistent state elsewhere.
+  procd_append_param command --state /etc/tailscale/tailscaled.state
+
+  procd_set_param respawn
+  procd_set_param stdout 1
+  procd_set_param stderr 1
+
+  procd_close_instance
+}
+
+stop_service() {
+  /usr/sbin/tailscaled --cleanup
+}
diff --git a/etc/init.d/tailscale_enabler b/etc/init.d/tailscale_enabler
new file mode 100644
index 0000000..26a59d1
--- /dev/null
+++ b/etc/init.d/tailscale_enabler
@@ -0,0 +1,10 @@
+#!/bin/sh /etc/rc.common
+USE_PROCD=1
+START=98
+STOP=01
+start_service() {
+    procd_open_instance
+    procd_set_param command /usr/bin/tailscale_enabler
+    procd_close_instance
+}
+
diff --git a/tailscale_enabler_README.md b/tailscale_enabler_README.md
new file mode 100644
index 0000000..440ddf4
--- /dev/null
+++ b/tailscale_enabler_README.md
@@ -0,0 +1,37 @@
+# Tailscale on OpenWRT
+
+1. Extract the contents of root to your filesystem root using:
+```
+tar x -zvf tailscale_enabler.tgz -C /
+```
+
+2. Install the prerequisites for wget and tailscale using:
+```
+opkg update
+opkg install libustream-openssl ca-bundle kmod-tun
+```
+
+3. Run tailscale for the first time:
+```
+tailscale_enabler
+/etc/init.d/tailscale start
+tailscale up --accept-dns=false --advertise-routes=10.0.0.0/24
+```
+
+The tailscale_enabler will download the tailscale binaries to /tmp and tailscale will start the tailscale daemon. 
+The last command uses the tailscale CLI to configure the login and add some settings to prevent dns changes and advertise routes. Use the URL printed to login to tailscale.
+
+4. Enable tailscale at boot:
+```
+/etc/init.d/tailscale_enabler enable
+/etc/init.d/tailscale enable
+```
+
+Verify by looking for two entries here:
+```
+ls /etc/rc.d/S*tailscale*
+```
+
+5. Reboot the router and verify that it shows up online on the [Tailscale Admin portal](https://login.tailscale.com/admin/machines).
+
+6. To update the version of tailscale, grab the latest version [here](https://pkgs.tailscale.com/stable/#static) of the form `1.2.10_mips` and replace the same in /usr/bin/tailscale_enabler: `version="1.2.10_mips"`.
diff --git a/usr/bin/tailscale b/usr/bin/tailscale
new file mode 120000
index 0000000..c5f9db1
--- /dev/null
+++ b/usr/bin/tailscale
@@ -0,0 +1 @@
+/tmp/tailscale
\ No newline at end of file
diff --git a/usr/bin/tailscale_enabler b/usr/bin/tailscale_enabler
new file mode 100644
index 0000000..4fcef29
--- /dev/null
+++ b/usr/bin/tailscale_enabler
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+version='1.2.10_mips'
+
+if [ ! -f /tmp/tailscaled ]; then
+  echo "Downloading Tailscale ${version} .."
+
+  echo -e "tailscale_${version}/tailscale\ntailscale_${version}/tailscaled" > /tmp/tailscale_${version}_files.txt
+
+  wget -O- https://pkgs.tailscale.com/stable/tailscale_${version}.tgz | tar x -zvf - -C /tmp -T /tmp/tailscale_${version}_files.txt
+
+  mv /tmp/tailscale_$version/* /tmp
+  rm -rf /tmp/tailscale_${version}*
+  
+  echo "Done!"
+
+else
+  echo "Tailscale already exists!"
+
+fi
diff --git a/usr/bin/tailscaled b/usr/bin/tailscaled
new file mode 120000
index 0000000..7340992
--- /dev/null
+++ b/usr/bin/tailscaled
@@ -0,0 +1 @@
+/tmp/tailscaled
\ No newline at end of file