with root permissions. Commands prefixed with a \texttt{\$} should be run with
user permissions.
-\begin{longtable}{|p{.2\linewidth}|p{.8\linewidth}|}
+\begin{longtable}{|l|rp{.8\linewidth}|}
\hline
- Check 1 & Get the SUT in a workable state.\\
+ Check 1 & \multicolumn{2}{l|}{Get the SUT in a workable state.}\\
\hline
\multirow{3}{*}{Course of action}
- & 1. Import the VirtualBox image into VirtualBox.\\
- & 2. Boot the vm.\\
- & 3. Verify the SUT booted successfully and the network modules are
+ & 1. & Import the VirtualBox image into VirtualBox.\\
+ & 2. & Boot the vm.\\
+ & 3. & Verify the SUT booted successfully and the network modules are
loaded.\\
\hline
- Passed & \textit{Yes/No} \\
+ Passed & \multicolumn{2}{l|}{\textit{Yes/No}}\\
\hline\hline
- Check 2 & Verify the SUT is complete. \\
+ Check 2 & \multicolumn{2}{l|}{Verify the SUT is complete.}\\
\hline
\multirow{5}{*}{Course of action}
- & 1. Boot the SUT as in \emph{Check 1}.\\
- & 2. Verify the loopback device exists by running
- \texttt{\$ ifconfig}.\\
- & 3. Verify the \emph{echo-server} is present on the system by running
+ & 1. & Boot the SUT as in \emph{Check 1}.\\
+ & 2. & Verify the loopback device exists by running
+ \texttt{\$ ifconfig}.\\
+ & 3. & Verify the \emph{echo-server} is present on the system by running
\texttt{\$ file code/server/Main.java}\\
- & 4. Verify \emph{Scapy} is present on the system by running
+ & 4. & Verify \emph{Scapy} is present on the system by running
\texttt{\$ scapy}.\\
- & 5. Verify all scripts used for testing are present on the system.\\
+ & 5. & Verify all scripts used for testing are present on the system.\\
\hline
- Passed & \textit{Yes/No}\\
+ Passed & \multicolumn{2}{l|}{\textit{Yes/No}}\\
\hline\hline
- Check 3 & Initialize the testing environment.\\
+ Check 3 & \multicolumn{2}{l|}{Initialize the testing environment..}\\
\hline
\multirow{5}{*}{Course of action}
- & 1. Boot the SUT as in \emph{Check 1}.\\
- & 2. Setup iptables by executing
+ & 1. & Boot the SUT as in \emph{Check 1}.\\
+ & 2. & Setup iptables by executing
\texttt{\# code/iptables.sh}~\footnote{The IPTables script ensures
that the OS does not drop packets due to an the unknown source.}\\
- & 3. Navigate to the working directory by running
+ & 3. & Navigate to the working directory by running
\texttt{\$ cd /home/student/tt2015}\\
- & Compile the echo server by running
+ & 4. & Compile the echo server by running
\texttt{\# cd code/server \&\& make \&\& cd -}\\
- & Start the echo server by running
+ & 5. & Start the echo server by running
\texttt{\# cd code/server \&\& java Main}\\
\hline
- Passed & \textit{Yes/No}\\
+ Passed & \multicolumn{2}{l|}{\textit{Yes/No}}\\
\hline\hline
- Check 4 & Test the tool environment.\\
+ Check 4 & \multicolumn{2}{l|}{Test the tool environment.}\\
\hline
\multirow{3}{*}{Course of action}
- & 1. Initialize the SUT as in \emph{Check 3}\\
- & 2. Execute the test script by running
+ & 1. & Initialize the SUT as in \emph{Check 3}\\
+ & 2. & Execute the test script by running
\texttt{\# code/client/helloworld.py}\\
- & 3. Verify the console displays a success message.\\
+ & 3. & Verify the console displays a success message.\\
\hline
- Passed & \textit{Yes/No}\\
+ Passed & \multicolumn{2}{l|}{\textit{Yes/No}}\\
\hline\hline
- Check 5 & All test inputs and scripts are present.\\\hline
+ Check 5 & \multicolumn{2}{l|}{All test inputs and scripts are present.}\\
+ \hline
\multirow{2}{*}{Course of action}
- & 1. Boot the SUT as in \emph{Check 1}.\\
- & 2. Verify that the test generation script is present by running
+ & 1. & Boot the SUT as in \emph{Check 1}.\\
+ & 2. & Verify that the test generation script is present by running
\texttt{\$ file code/client/test.py}\\
\hline
- Passed & \textit{Yes/No}\\
+ Passed & \multicolumn{2}{l|}{\textit{Yes/No}}\\
\hline
\caption{Preflight checklist\label{tbl:preflight}}
\end{longtable}
\item Bits flipped in \emph{payload}
\begin{enumerate}
\item Correct payload
- \item Payload with even number of bits flipped
+ \item Payload with bit flips
\item Payload with odd number of bits flipped
\end{enumerate}
\item \emph{checksum}
\end{enumerate}
\end{enumerate}
+These partitions were chosen since they correspond to key parts of the TCP
+specification.
+
+TCP segments are send over a TCP connection from a \emph{source} to a \emph{destination port}. Therefore segments which are received which have a
+source or destination port set to an incorrect value should not be regarded
+as segments belonging to the connection.
+
+TCP uses a \emph{checksum} to catch any error introduced in headers, when this
+checksum does not match the actual computed checksum the packet should be
+disregarded.
+
+The TCP checksum is also an inherently weak one, as it is simply the
+bitwise negation of the addition in ones complement arithmetic
+of all 16 bit words in the header and data of the segment (excluding the
+header). Therefore any bit error where the ones complement value of one word
+increases by one, and the value of another decreases by one, is undetected.
+The SUT should exhibit the same behavior and accept packets where these type
+of bit error occur.
+
\textbf{hier iets over waarom deze partities relevant zijn! Waarom odd en
even number of bits flipped bijv interessant?}
\bigskip
repositories / tt2015.git / blobdiff