/* TEMPLATE GENERATED TESTCASE FILE
Filename: CWE369_Divide_by_Zero__float_connect_tcp_modulo_16.java
Label Definition File: CWE369_Divide_by_Zero__float.label.xml
Template File: sources-sinks-16.tmpl.java
*/
/*
* @description
* CWE: 369 Divide by zero
* BadSource: connect_tcp Read data using an outbound tcp connection
* GoodSource: A hardcoded non-zero number (two)
* Sinks: modulo
*    GoodSink: Check for zero before modulo
*    BadSink : Modulo by a value that may be zero
* Flow Variant: 16 Control flow: while(true)
*
* */




import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;
import java.net.Socket;

import java.util.logging.Level;

public class CWE369_Divide_by_Zero__float_connect_tcp_modulo_16 extends AbstractTestCase
{
    public void bad() throws Throwable
    {
        float data;

        while (true)
        {
            data = -1.0f; /* Initialize data */
            /* Read data using an outbound tcp connection */
            {
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;
                try
                {
                    /* Read data using an outbound tcp connection */
                    socket = new Socket("host.example.org", 39544);
                    /* read input from socket */
                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);
                    /* POTENTIAL FLAW: Read data using an outbound tcp connection */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) // avoid NPD incidental warnings
                    {
                        try
                        {
                            data = Float.parseFloat(stringNumber.trim());
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }
                }
            }
            break;
        }

        while (true)
        {
            /* POTENTIAL FLAW: Possibly modulo by zero */
            int result = (int)(100.0 % data);
            IO.writeLine(result);
            break;
        }
    }

    /* goodG2B() - use goodsource and badsink */
    private void goodG2B() throws Throwable
    {
        float data;

        while (true)
        {
            /* FIX: Use a hardcoded number that won't a divide by zero */
            data = 2.0f;
            break;
        }

        while (true)
        {
            /* POTENTIAL FLAW: Possibly modulo by zero */
            int result = (int)(100.0 % data);
            IO.writeLine(result);
            break;
        }

    }

    /* goodB2G() - use badsource and goodsink */
    private void goodB2G() throws Throwable
    {
        float data;

        while (true)
        {
            data = -1.0f; /* Initialize data */
            /* Read data using an outbound tcp connection */
            {
                Socket socket = null;
                BufferedReader readerBuffered = null;
                InputStreamReader readerInputStream = null;
                try
                {
                    /* Read data using an outbound tcp connection */
                    socket = new Socket("host.example.org", 39544);
                    /* read input from socket */
                    readerInputStream = new InputStreamReader(socket.getInputStream(), "UTF-8");
                    readerBuffered = new BufferedReader(readerInputStream);
                    /* POTENTIAL FLAW: Read data using an outbound tcp connection */
                    String stringNumber = readerBuffered.readLine();
                    if (stringNumber != null) // avoid NPD incidental warnings
                    {
                        try
                        {
                            data = Float.parseFloat(stringNumber.trim());
                        }
                        catch(NumberFormatException exceptNumberFormat)
                        {
                            IO.logger.log(Level.WARNING, "Number format exception parsing data from string", exceptNumberFormat);
                        }
                    }
                }
                catch (IOException exceptIO)
                {
                    IO.logger.log(Level.WARNING, "Error with stream reading", exceptIO);
                }
                finally
                {
                    /* clean up stream reading objects */
                    try
                    {
                        if (readerBuffered != null)
                        {
                            readerBuffered.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing BufferedReader", exceptIO);
                    }

                    try
                    {
                        if (readerInputStream != null)
                        {
                            readerInputStream.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing InputStreamReader", exceptIO);
                    }

                    /* clean up socket objects */
                    try
                    {
                        if (socket != null)
                        {
                            socket.close();
                        }
                    }
                    catch (IOException exceptIO)
                    {
                        IO.logger.log(Level.WARNING, "Error closing Socket", exceptIO);
                    }
                }
            }
            break;
        }

        while (true)
        {
            /* FIX: Check for value of or near zero before modulo */
            if (Math.abs(data) > 0.000001)
            {
                int result = (int)(100.0 % data);
                IO.writeLine(result);
            }
            else
            {
                IO.writeLine("This would result in a modulo by zero");
            }
            break;
        }
    }

    public void good() throws Throwable
    {
        goodG2B();
        goodB2G();
    }

    /* Below is the main(). It is only used when building this testcase on
     * its own for testing or for building a binary to use in testing binary
     * analysis tools. It is not used when compiling all the testcases as one
     * application, which is how source code analysis tools are tested.
     */
    public static void main(String[] args) throws ClassNotFoundException,
           InstantiationException, IllegalAccessException
    {
        mainFromParent(args);
    }
}
