BTLogin

BTLogin is a simple shell script to automate BT FON logins in a headless environment when a GUI web browser is not available.

Usage

bt_login.sh [-h|--help] [-s|--syslog] [-t|--timeout n] [wait]

    Options:
        -h      --help         Display this help
        -s      --syslog       Log result to syslog
        -t n    --timeout n    Wait n seconds for a reply [default 30]
        wait                   An integer value to wait between checks.
                               The script will loop continuously checking your login
                               status. Without it, the script will check once and
                               terminate.

Tested

There are a few ways to install this script. If you plan to run this on OpenWRT, ensure you install the full wget package via Luci or ssh ...

opkg update
opkg install wget

Place bt_login.sh in a convenient location and edit the user and pass variables to suit.

wget https://raw.githubusercontent.com/g0wfv/BTLogin/master/bt_login.sh
chmod a+x bt_login.sh

You can then choose from one of the following 3 methods below ...

1. Install the travelmate package and set bt_login.sh as an Auto Login Script. (Recommended)

travelmate is a wlan connection manager for travel routers. It has built in captive portal detection (the annoying login screen you get before it lets you onto the internet!) and can execute a script to automatically login. After sucessfully using method 2 (below) for a number of months, I have now migrated to this method which is working even more reliably and more appropriately, runs only when needed.

opkg update
opkg install travelmate luci-app-travelmate
ln -s /path/to/bt_login.sh /etc/travelmate/BTWifi-with-FON.login

Although you can configure travelmate through the command line, it is far more convenient to configure it via Luci as in this picture (Services > Travelmate / Wireless Stations / Edit) ...

2. Add the script to /etc/rc.local either through ssh or in Luci (System > Startup)

# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.

/path/to/bt_login.sh 60 &
exit 0

3. Run as a cron job ...

crontab -e

* * * * * /path/to/bt_login.sh >/dev/null 2>&1

The above example will run the script every minute.

Finally, reboot your router!

Untested!

It is possible the script could be run from /etc/network/interfaces although I haven't tested or used this method. A possible configuration for this could look like this ...

auto lo
iface lo inet loopback

iface eth0 inet manual

allow-hotplug wlan0
iface wlan0 inet manual
    wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
    post-up /path/to/bt_login.sh

Script methodology

The script first checks that you have an internet connection by seeing if it can contact the btopenzone.com login server. If the server is detected, your current login status is determined. If you are already logged in, it will do nothing. If you are logged out, it will attempt to log you in. Nothing could be simpler.

Future development

It is very conceivable that this script could be used as the basis for other open Wifi hotspots (o2, Virgin Media, etc) that require you to log in via a web form. If you do use this script in this manner, please consider submitting the resulting script as an extra, ie, o2_login.sh or similar.