text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE194_Unexpected_Sign_Extension__connect_socket_memmove_31.c
  Label Definition File: CWE194_Unexpected_Sign_Extension.label.xml
  Template File: sources-sink-31.tmpl.c
  */
  /*
   * @description
   * CWE: 194 Unexpected Sign Extension
   * BadSource: connect_socket Read data using a connect socket (client side)
   * GoodSource: Positive integer
   * Sinks: memmove
   *    BadSink : Copy strings using memmove() with the length of data
   * Flow Variant: 31 Data flow using a copy of data within the same function
   *
   * */
  
  #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
  /* Must be at least 8 for atoi() to work properly */
  #define CHAR_ARRAY_SIZE 8
  #define IP_ADDRESS "127.0.0.1"
  
  #ifndef OMITBAD
  
  void CWE194_Unexpected_Sign_Extension__connect_socket_memmove_31_bad()
  {
      short data;
      /* Initialize data */
      data = 0;
      {
  #ifdef _WIN32
          WSADATA wsaData;
          int wsaDataInit = 0;
  #endif
          int recvResult;
          int tempInt;
          struct sockaddr_in service;
          SOCKET connectSocket = INVALID_SOCKET;
          char inputBuffer[CHAR_ARRAY_SIZE];
          do
          {
  #ifdef _WIN32
              if (WSAStartup(MAKEWORD(2,2), &wsaData) != NO_ERROR)
              {
                  break;
              }
              wsaDataInit = 1;
  #endif
              connectSocket = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
              if (connectSocket == INVALID_SOCKET)
              {
                  break;
              }
              memset(&service, 0, sizeof(service));
              service.sin_family = AF_INET;
              service.sin_addr.s_addr = inet_addr(IP_ADDRESS);
              service.sin_port = htons(TCP_PORT);
              if (connect(connectSocket, (struct sockaddr*)&service, sizeof(service)) == SOCKET_ERROR)
              {
                  break;
              }
              /* Abort on error or the connection was closed, make sure to recv one
               * less char than is in the recv_buf in order to append a terminator */
              /* FLAW: Use a value input from the network */
              recvResult = recv(connectSocket, inputBuffer, CHAR_ARRAY_SIZE - 1, 0);
              if (recvResult == SOCKET_ERROR || recvResult == 0)
              {
                  break;
              }
              /* NUL-terminate string */
              inputBuffer[recvResult] = '\0';
              /* Convert to short - ensure int to short conversion will be successful and if
               * not ensure that data will be negative */
              tempInt = atoi(inputBuffer);
              if (tempInt > SHRT_MAX || tempInt < SHRT_MIN)
              {
                  data = -1;
              }
              else
              {
                  data = tempInt;
              }
          }
          while (0);
          if (connectSocket != INVALID_SOCKET)
          {
              CLOSE_SOCKET(connectSocket);
          }
  #ifdef _WIN32
          if (wsaDataInit)
          {
              WSACleanup();
          }
  #endif
      }
      {
          short dataCopy = data;
          short data = dataCopy;
          {
              char source[100];
              char dest[100] = "";
              memset(source, 'A', 100-1);
              source[100-1] = '\0';
              if (data < 100)
              {
                  /* POTENTIAL FLAW: data is interpreted as an unsigned int - if its value is negative,
                   * the sign extension could result in a very large number */
                  memmove(dest, source, data);
                  dest[data] = '\0'; /* NULL terminate */
              }
              printLine(dest);
          }
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodG2B() uses the GoodSource with the BadSink */
  static void goodG2B()
  {
      short data;
      /* Initialize data */
      data = 0;
      /* FIX: Use a positive integer less than &InitialDataSize&*/
      data = 100-1;
      {
          short dataCopy = data;
          short data = dataCopy;
          {
              char source[100];
              char dest[100] = "";
              memset(source, 'A', 100-1);
              source[100-1] = '\0';
              if (data < 100)
              {
                  /* POTENTIAL FLAW: data is interpreted as an unsigned int - if its value is negative,
                   * the sign extension could result in a very large number */
                  memmove(dest, source, data);
                  dest[data] = '\0'; /* NULL terminate */
              }
              printLine(dest);
          }
      }
  }
  
  void CWE194_Unexpected_Sign_Extension__connect_socket_memmove_31_good()
  {
      goodG2B();
  }
  
  #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()...");
      CWE194_Unexpected_Sign_Extension__connect_socket_memmove_31_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE194_Unexpected_Sign_Extension__connect_socket_memmove_31_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  