Add more advanced VPN status/connection script

This script has the following features:
 * Will actually launch a VPN connection and wait for it to complete
 * Configurable and could work with any CLI VPN client
 * Will update the menu item instantly after connecting/disconnecting

Network/vpn_advanced.sh

@@ -0,0 +1,59 @@
+#!/bin/bash
+
+# Get current status of a VPN connection with options to connect/disconnect.
+# Working with OpenConnect, but can work with any executable VPN. Commands
+# that require admin permissions should be whitelisted with 'visudo', e.g.:
+#
+#joesmith ALL=(ALL) NOPASSWD: /usr/local/bin/openconnect
+#joesmith ALL=(ALL) NOPASSWD: /usr/bin/killall -2 openconnect
+
+# <bitbar.title>VPN Status</bitbar.title>
+# <bitbar.version>v1.0</bitbar.version>
+# <bitbar.author>Jesse Jarzynka</bitbar.author>
+# <bitbar.author.github>jessejoe</bitbar.author.github>
+# <bitbar.desc>Displays status of a VPN interface with option to connect/disconnect.</bitbar.desc>
+# <bitbar.image>http://i.imgur.com/RkmptwO.png</bitbar.image>
+
+VPN_EXECUTABLE=/usr/local/bin/openconnect
+VPN_EXECUTABLE_PARAMS="--script=$HOME/scripts/vpnc-script-no-dns" # Optional
+VPN_HOST="vpn.mydomain.com"
+VPN_INTERFACE="utun0"
+VPN_USERNAME="joe.smith"
+# A command that will result in your VPN password. Recommend using
+# "security find-generic-password -g -a foo" where foo is an account
+# in your OSX Keychain, to avoid passwords stored in plain text
+GET_VPN_PASSWORD="security find-generic-password -g -a joe.smith 2>&1 >/dev/null | cut -d'\"' -f2"
+#GET_VPN_PASSWORD="cat ~/.vpnpass"
+#GET_VPN_PASSWORD="echo hunter2" # Not recommended
+# Command to determine if VPN is connected or disconnected
+VPN_CONNECTED="/sbin/ifconfig | egrep -A1 $VPN_INTERFACE | grep inet"
+# Command to run to disconnect VPN
+VPN_DISCONNECT_CMD="sudo killall -2 openconnect"
+
+case "$1" in
+    connect)
+        VPN_PASSWORD=$(eval "$GET_VPN_PASSWORD")
+        # VPN connection command, should eventually result in $VPN_CONNECTED,
+        # may need to be modified for VPN clients other than openconnect
+        echo "$VPN_PASSWORD" | sudo "$VPN_EXECUTABLE" "$VPN_EXECUTABLE_PARAMS" --user "$VPN_USERNAME" --passwd-on-stdin "$VPN_HOST" &> /dev/null &
+        # Wait for connection so menu item refreshes instantly
+        until eval "$VPN_CONNECTED"; do sleep 1; done
+        ;;
+    disconnect)
+        eval "$VPN_DISCONNECT_CMD"
+        # Wait for disconnection so menu item refreshes instantly
+        until [ -z "$(eval "$VPN_CONNECTED")" ]; do sleep 1; done
+        ;;
+esac
+
+if [ -n "$(eval "$VPN_CONNECTED")" ]; then
+    echo "VPN ✔"
+    echo '---'
+    echo "Disconnect VPN | bash=$0 param1=disconnect terminal=false refresh=true"
+    exit
+else
+    echo "VPN ✘"
+    echo '---'
+    echo "Connect VPN | bash=$0 param1=connect terminal=false refresh=true"
+    exit
+fi