I'm writing a small manual for our self-developed protocol.

To show the packet structure we like to include a table like it's shown on this Wikipedia page: http://en.wikipedia.org/wiki/User_Datagram_Protocol#Packet_structure

Is there any prebuilt library for this purpose or should it be implemented by myself?


You can use the bytefield package, developed exactly with the purpose of drawing protocol packet structures.

An example taken from the manual:



        \bitheader{0-31} \\
        \begin{rightwordgroup}{RTP \\  Header}
            \bitbox{2}{V=2} & \bitbox{1}{P} & \bitbox{1}{X}
            & \bitbox{4}{CC} & \bitbox{1}{M} & \bitbox{7}{PT}
            & \bitbox{16}{sequence number} \\
        \end{rightwordgroup} \\
        \bitbox{32}{synchronization source (SSRC) identifier} \\
        \wordbox[tlr]{1}{contributing source (CSRC) identifiers} \\
        \wordbox[blr]{1}{$\cdots$} \\
        \begin{rightwordgroup}{RTP \\ Payload}
            \wordbox[tlr]{3}{MPEG-4 Visual stream (byte aligned)} \\
            & \bitbox{16}{\dots\emph{optional} RTP padding}


The result:

enter image description here

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