text: /* TEMPLATE GENERATED TESTCASE FILE
  Filename: CWE369_Divide_by_Zero__int_connect_socket_modulo_05.c
  Label Definition File: CWE369_Divide_by_Zero__int.label.xml
  Template File: sources-sinks-05.tmpl.c
  */
  /*
   * @description
   * CWE: 369 Divide by Zero
   * BadSource: connect_socket Read data using a connect socket (client side)
   * GoodSource: Non-zero
   * Sinks: modulo
   *    GoodSink: Check for zero before modulo
   *    BadSink : Modulo a constant with data
   * Flow Variant: 05 Control flow: if(staticTrue) and if(staticFalse)
   *
   * */
  
  #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)
  
  /* The two variables below are not defined as "const", but are never
     assigned any other value, so a tool should be able to identify that
     reads of these will always return their initialized values. */
  static int staticTrue = 1; /* true */
  static int staticFalse = 0; /* false */
  
  #ifndef OMITBAD
  
  void CWE369_Divide_by_Zero__int_connect_socket_modulo_05_bad()
  {
      int data;
      /* Initialize data */
      data = -1;
      if(staticTrue)
      {
          {
  #ifdef _WIN32
              WSADATA wsaData;
              int wsaDataInit = 0;
  #endif
              int recvResult;
              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
                  /* POTENTIAL FLAW: Read data using a connect socket */
                  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 */
                  recvResult = recv(connectSocket, inputBuffer, CHAR_ARRAY_SIZE - 1, 0);
                  if (recvResult == SOCKET_ERROR || recvResult == 0)
                  {
                      break;
                  }
                  /* NUL-terminate the string */
                  inputBuffer[recvResult] = '\0';
                  /* Convert to int */
                  data = atoi(inputBuffer);
              }
              while (0);
              if (connectSocket != INVALID_SOCKET)
              {
                  CLOSE_SOCKET(connectSocket);
              }
  #ifdef _WIN32
              if (wsaDataInit)
              {
                  WSACleanup();
              }
  #endif
          }
      }
      if(staticTrue)
      {
          /* POTENTIAL FLAW: Possibly divide by zero */
          printIntLine(100 % data);
      }
  }
  
  #endif /* OMITBAD */
  
  #ifndef OMITGOOD
  
  /* goodB2G1() - use badsource and goodsink by changing the second staticTrue to staticFalse */
  static void goodB2G1()
  {
      int data;
      /* Initialize data */
      data = -1;
      if(staticTrue)
      {
          {
  #ifdef _WIN32
              WSADATA wsaData;
              int wsaDataInit = 0;
  #endif
              int recvResult;
              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
                  /* POTENTIAL FLAW: Read data using a connect socket */
                  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 */
                  recvResult = recv(connectSocket, inputBuffer, CHAR_ARRAY_SIZE - 1, 0);
                  if (recvResult == SOCKET_ERROR || recvResult == 0)
                  {
                      break;
                  }
                  /* NUL-terminate the string */
                  inputBuffer[recvResult] = '\0';
                  /* Convert to int */
                  data = atoi(inputBuffer);
              }
              while (0);
              if (connectSocket != INVALID_SOCKET)
              {
                  CLOSE_SOCKET(connectSocket);
              }
  #ifdef _WIN32
              if (wsaDataInit)
              {
                  WSACleanup();
              }
  #endif
          }
      }
      if(staticFalse)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: test for a zero denominator */
          if( data != 0 )
          {
              printIntLine(100 % data);
          }
          else
          {
              printLine("This would result in a divide by zero");
          }
      }
  }
  
  /* goodB2G2() - use badsource and goodsink by reversing the blocks in the second if */
  static void goodB2G2()
  {
      int data;
      /* Initialize data */
      data = -1;
      if(staticTrue)
      {
          {
  #ifdef _WIN32
              WSADATA wsaData;
              int wsaDataInit = 0;
  #endif
              int recvResult;
              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
                  /* POTENTIAL FLAW: Read data using a connect socket */
                  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 */
                  recvResult = recv(connectSocket, inputBuffer, CHAR_ARRAY_SIZE - 1, 0);
                  if (recvResult == SOCKET_ERROR || recvResult == 0)
                  {
                      break;
                  }
                  /* NUL-terminate the string */
                  inputBuffer[recvResult] = '\0';
                  /* Convert to int */
                  data = atoi(inputBuffer);
              }
              while (0);
              if (connectSocket != INVALID_SOCKET)
              {
                  CLOSE_SOCKET(connectSocket);
              }
  #ifdef _WIN32
              if (wsaDataInit)
              {
                  WSACleanup();
              }
  #endif
          }
      }
      if(staticTrue)
      {
          /* FIX: test for a zero denominator */
          if( data != 0 )
          {
              printIntLine(100 % data);
          }
          else
          {
              printLine("This would result in a divide by zero");
          }
      }
  }
  
  /* goodG2B1() - use goodsource and badsink by changing the first staticTrue to staticFalse */
  static void goodG2B1()
  {
      int data;
      /* Initialize data */
      data = -1;
      if(staticFalse)
      {
          /* INCIDENTAL: CWE 561 Dead Code, the code below will never run */
          printLine("Benign, fixed string");
      }
      else
      {
          /* FIX: Use a value not equal to zero */
          data = 7;
      }
      if(staticTrue)
      {
          /* POTENTIAL FLAW: Possibly divide by zero */
          printIntLine(100 % data);
      }
  }
  
  /* goodG2B2() - use goodsource and badsink by reversing the blocks in the first if */
  static void goodG2B2()
  {
      int data;
      /* Initialize data */
      data = -1;
      if(staticTrue)
      {
          /* FIX: Use a value not equal to zero */
          data = 7;
      }
      if(staticTrue)
      {
          /* POTENTIAL FLAW: Possibly divide by zero */
          printIntLine(100 % data);
      }
  }
  
  void CWE369_Divide_by_Zero__int_connect_socket_modulo_05_good()
  {
      goodB2G1();
      goodB2G2();
      goodG2B1();
      goodG2B2();
  }
  
  #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()...");
      CWE369_Divide_by_Zero__int_connect_socket_modulo_05_good();
      printLine("Finished good()");
  #endif /* OMITGOOD */
  #ifndef OMITBAD
      printLine("Calling bad()...");
      CWE369_Divide_by_Zero__int_connect_socket_modulo_05_bad();
      printLine("Finished bad()");
  #endif /* OMITBAD */
      return 0;
  }
  
  #endif
  