text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE191_Integer_Underflow__int_connect_socket_sub_61a.c
  Label Definition File: CWE191_Integer_Underflow__int.label.xml
  Template File: sources-sinks-61a.tmpl.c
  */
  /*
   * @description
   * CWE: 191 Integer Underflow
   * BadSource: connect_socket Read data using a connect socket (client side)
   * GoodSource: Set data to a small, non-zero number (negative two)
   * Sinks: sub
   *    GoodSink: Ensure there will not be an underflow before subtracting 1 from data
   *    BadSink : Subtract 1 from data, which can cause an Underflow
   * Flow Variant: 61 Data flow: data returned from one function to another in different source files
   *
   * */
  
  #include "std_testcase.h"
  
  #ifdef _WIN32
  #include <winsock2.h>
  #include <windows.h>
  #include <direct.h>
  #pragma comment(lib, "ws2_32") /* include ws2_32.lib when linking */
  #define CLOSE_SOCKET closesocket
  #else /* NOT _WIN32 */
  #include <sys/types.h>
  #include <sys/socket.h>
  #include <netinet/in.h>
  #include <arpa/inet.h>
  #include <unistd.h>
  #define INVALID_SOCKET -1
  #define SOCKET_ERROR -1
  #define CLOSE_SOCKET close
  #define SOCKET int
  #endif
  
  #define TCP_PORT 27015
  #define IP_ADDRESS "127.0.0.1"
  #define CHAR_ARRAY_SIZE (3 * sizeof(data) + 2)
  
  #ifndef OMITBAD
  
  /* bad function declaration */
  int CWE191_Integer_Underflow__int_connect_socket_sub_61b_badSource(int data);
  
  void CWE191_Integer_Underflow__int_connect_socket_sub_61_bad()
  {
      int data;
      /* Initialize data */
      data = 0;
      data = CWE191_Integer_Underflow__int_connect_socket_sub_61b_badSource(data);
      {
          /* POTENTIAL FLAW: Subtracting 1 from data could cause an underflow */
          int result = data - 1;
          printIntLine(result);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B uses the GoodSource with the BadSink */
  int CWE191_Integer_Underflow__int_connect_socket_sub_61b_goodG2BSource(int data);
  
  static void goodG2B()
  {
      int data;
      /* Initialize data */
      data = 0;
      data = CWE191_Integer_Underflow__int_connect_socket_sub_61b_goodG2BSource(data);
      {
          /* POTENTIAL FLAW: Subtracting 1 from data could cause an underflow */
          int result = data - 1;
          printIntLine(result);
      }
  }
  
  /* goodB2G uses the BadSource with the GoodSink */
  int CWE191_Integer_Underflow__int_connect_socket_sub_61b_goodB2GSource(int data);
  
  static void goodB2G()
  {
      int data;
      /* Initialize data */
      data = 0;
      data = CWE191_Integer_Underflow__int_connect_socket_sub_61b_goodB2GSource(data);
      /* FIX: Add a check to prevent an underflow from occurring */
      if (data > INT_MIN)
      {
          int result = data - 1;
          printIntLine(result);
      }
      else
      {
          printLine("data value is too large to perform subtraction.");
      }
  }
  
  void CWE191_Integer_Underflow__int_connect_socket_sub_61_good()
  {
      goodG2B();
      goodB2G();
  }
  
  #endif /* OMITGOOD */
  
  /* 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. */
  
  #ifdef INCLUDEMAIN
  
  int main(int argc, char * argv[])
  {
      /* seed randomness */
      srand( (unsigned)time(NULL) );
  #ifndef OMITGOOD
      printLine("Calling good()...");
      CWE191_Integer_Underflow__int_connect_socket_sub_61_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE191_Integer_Underflow__int_connect_socket_sub_61_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  