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//####COPYRIGHTBEGIN####

//                                                                          

// ----------------------------------------------------------------------------

// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.

//

// This program is part of the eCos host tools.

//

// This program is free software; you can redistribute it and/or modify it 

// under the terms of the GNU General Public License as published by the Free 

// Software Foundation; either version 2 of the License, or (at your option) 

// any later version.

// 

// This program is distributed in the hope that it will be useful, but WITHOUT 

// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 

// FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for 

// more details.

// 

// You should have received a copy of the GNU General Public License along with

// this program; if not, write to the Free Software Foundation, Inc., 

// 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

//

// ----------------------------------------------------------------------------

//                                                                          

//####COPYRIGHTEND####

//=================================================================

//

//        eCosSocket.h

//

//        Socket test class

//

//=================================================================

//=================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     sdf

// Contributors:  sdf

// Date:          1999-04-01

// Description:   This class abstracts tcp/ip sockets for use in the testing infrastructure

// Usage:

//

//####DESCRIPTIONEND####

//=================================================================

// This class is a host-independent interface to a TCP/IP socket

// There are two flavours of socket - server and client.

// Server sockets listen (accept) on a socket number.  Client sockets connect to a host:port.

// The class can be used thus:

//   Server:

//      CeCosSocket sock; // no-argument ctor

//      if(-1!=sock.Listen(6000)){

//        ...      

//      }

//   Client:

//      CeCosSocket sock;

//      if(sock.Connect(_T("ginga"),5000)){

//        ...      

//      }

// In each of the above cases the socket is closed automatically by the dtor.

//

// Alternatively, the ctor can be used directly:

//   Server:

//      CeCosSocket sock(6000));

//      ...      

//   Client:

//      CeCosSocket sock(_T("ginga"),5000));

//      ...      

//

//=================================================================

#include "eCosStd.h"

#include "Collections.h"

#ifndef _SOCKETUTILS_H

#define _SOCKETUTILS_H

class CeCosSerial;

class CeCosSocket {

public:

        static const String GetHostByName(LPCTSTR pszHost);

  // These functions must be called before any other operation is carried out:

        static bool Init();

        static void Term();

  typedef bool (CALLBACK FilterFunc)(void *&,unsigned int &,CeCosSerial&,CeCosSocket &,void *);

  // A function that causes an operation to stop - i.e. it when it returns true the operation is aborted.

  typedef bool (CALLBACK StopFunc)(void *);

  enum {NOTIMEOUT=0x7fffffff-1,DEFAULTTIMEOUT=-2}; // No explicit timeout specified

  // Listen and this form of constructor used to act as server

  static int Listen(int nTcpPort);

  CeCosSocket (); // Caller promises to call Accept() or Connect() later

  // Accept-like ctor (act as server)

  CeCosSocket (int sock /*result of previous call of Listen*/, bool *pbStop=0);

  // Connect-like ctor (act as client)

  CeCosSocket (LPCTSTR pszHostPort,Duration dTimeout=NOTIMEOUT);

  bool Accept(int sock /*result of previous call of Listen*/, bool *pbStop=0);

  // This form of constructor used to act as client

  bool Connect(LPCTSTR pszHostPort,Duration dTimeout=NOTIMEOUT);

  ~CeCosSocket();

  int Client() const { return m_nClient; }

  static String ClientName(int nClient);

  int Sock() const { return m_nSock; }

  // Set the default timeout for all operations

  void SetTimeout (Duration dTimeout) { m_nDefaultTimeout=dTimeout; }

  // Use to test success after opening with the ctor:

  bool Ok() { return -1!=m_nSock; }

  // Close the given socket

  bool Close () { return CloseSocket(m_nSock); }

  // Return last error on this socket

  int SocketError() { return m_nErr; }

  // Return last socket error, translated to a string

  String SocketErrString();

  static String SocketErrString(int nErr);

  // Read and write functions

  // Untyped: these versions allow the operation to be aborted either by timeout or by the "stop func" returning true.

  bool send(const void *pData,unsigned int nLength,LPCTSTR pszMsg=_T(""),int dTimeout=DEFAULTTIMEOUT,StopFunc *pFunc=0,void *pParam=0){

    return sendrecv(true,pData,nLength,pszMsg,dTimeout,pFunc,pParam);

  }

  bool recv(const void *pData,unsigned int nLength,LPCTSTR pszMsg=_T(""),int dTimeout=DEFAULTTIMEOUT,StopFunc *pFunc=0,void *pParam=0){

    return sendrecv(false,pData,nLength,pszMsg,dTimeout,pFunc,pParam);

  }

  // Read/write an integer (this can be used between machines of different endianness)

  bool recvInteger (int &n,LPCTSTR pszMsg=_T(""),Duration dTimeout=DEFAULTTIMEOUT);

  bool sendInteger (int n,LPCTSTR pszMsg=_T(""),Duration dTimeout=DEFAULTTIMEOUT);

  // Read/write a string

  bool recvString  (String &str,LPCTSTR pszMsg=_T(""),Duration dTimeout=DEFAULTTIMEOUT);

  bool sendString  (const String &str,LPCTSTR pszMsg=_T(""),Duration dTimeout=DEFAULTTIMEOUT);

  static bool CloseSocket (int &sock);

  bool Peek (unsigned int &nAvail);

  // Miscellaneous helper functions:

  // Combine string and integer to the form host:port:

  static String HostPort(LPCTSTR pszHost,int nPort);

  // Decompose (opposite of the above):

  static bool ParseHostPort (LPCTSTR pszHostPort, String &pszHost, int &nPort);

  // Just check for legality:

  static bool IsLegalHostPort (LPCTSTR pszHostPort);

  // Are these two hosts really the same?

  static bool SameHost (LPCTSTR host1,LPCTSTR host2);

  // Set up a connection between a serial port and a socket.  Traffic is simply passed between them.

  static bool ConnectSocketToSerial (int nListenSock,LPCTSTR pszPort, int nBaud,FilterFunc *pSerialToSocketFilterFunc=0,void *pSerialParam=0,FilterFunc *pSocketToSerialFilterFunc=0,void *pSocketParam=0,bool *pbStop=0);

  static bool ConnectSocketToSerial (CeCosSocket &socket,CeCosSerial &serial,FilterFunc *pSerialToSocketFilterFunc=0,void *pSerialParam=0, FilterFunc *pSocketToSerialFilterFunc=0,void *pSocketParam=0,bool *pbStop=0);

  static LPCTSTR MyHostName();

  static LPCTSTR MySimpleHostName();

  // Set up a connection between two sockets.  Traffic is simply passed between them.

  bool ConnectSocketToSocket (CeCosSocket &o,FilterFunc *pSocketToSocketFilterFunc1,FilterFunc *pSocketToSocketFilterFunc2,void *pParam,bool *pbStop);

  enum   SSReadResult {SS_SOCKET_ERROR=-1,SS_SOCKET_READ=1,SS_SERIAL_ERROR=-2,SS_SERIAL_READ=2,SS_STOPPED=0};

protected:

  // Blocking read on one or other of the data sources:

  // Result:  -1 - socket error occurred

  //           1 - data read from socket

  //          -2 - serial error occurred

  //           2 - data read from serial

  static SSReadResult SSRead (CeCosSerial &serial,CeCosSocket &socket,void *pBuf,unsigned int nSize,unsigned int &nRead,bool *pbStop);

  Duration m_nDefaultTimeout;

  Duration TimeoutDuration (Duration dTimeout);

  // Set appropriate socket options (most importantly, non-blocking mode)

  bool SetSocketOptions ();

  int m_nSock;

  int m_nClient;

  int m_nErr;

  void SaveError() {

#ifdef _WIN32

  m_nErr=WSAGetLastError();

#else // UNIX

  m_nErr=errno;

#endif

  }

  bool sendrecv(bool bSend,const void *pData,unsigned int nLength,LPCTSTR pszMsg=_T(""),int dTimeout=DEFAULTTIMEOUT,StopFunc *pFunc=0,void *pParam=0);

};

#endif