the necessary shell scripts by running:
\begin{Verbatim}
-. /etc/functions.sh # common functions
+. /lib/functions.sh # common functions
include /lib/network # include /lib/network/*.sh
scan_interfaces # read and parse the network config
\end{Verbatim}
\subsubsection{Writing protocol handlers}
-You can add custom protocol handlers by adding shell scripts to
-\texttt{/lib/network}. They provide the following two shell functions:
+You can add custom protocol handlers (e.g: PPPoE, PPPoA, ATM, PPTP ...)
+by adding shell scripts to \texttt{/lib/network}. They provide the following
+two shell functions:
\begin{Verbatim}
scan_<protocolname>() {