multiple errors generated by socket headers

This is a discussion on multiple errors generated by socket headers within the Windows Programming forums, part of the Platform Specific Boards category; Hi, i include in my code some header files from another projects. These is basically networking codel; wrapers around sockets, ...

  1. #1
    Registered User
    Join Date
    Dec 2007
    Posts
    19

    multiple errors generated by socket headers

    Hi,
    i include in my code some header files from another projects. These is basically networking codel; wrapers around sockets, etc.

    However, i get an output full of errors like this, while compiling:
    Code:
    ....
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(867) : see declaration of 'getservbyname'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock2.h(2196) : error C2375: 'getprotobynumber' : redefinition; different linkage
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(871) : see declaration of 'getprotobynumber'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock2.h(2213) : error C2375: 'getprotobyname' : redefinition; different linkage
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(873) : see declaration of 'getprotobyname'
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(358) : see previous definition of 'IP_ADD_MEMBERSHIP'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WS2tcpip.h(77) : warning C4005: 'IP_DROP_MEMBERSHIP' : macro redefinition
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(359) : see previous definition of 'IP_DROP_MEMBERSHIP'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WS2tcpip.h(78) : warning C4005: 'IP_DONTFRAGMENT' : macro redefinition
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WS2tcpip.h(72) : warning C4005: 'IP_TTL' : macro redefinition
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(360) : see previous definition of 'IP_TTL'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WS2tcpip.h(73) : warning C4005: 'IP_MULTICAST_IF' : macro redefinition
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(355) : see previous definition of 'IP_MULTICAST_IF'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WS2tcpip.h(74) : warning C4005: 'IP_MULTICAST_TTL' : macro redefinition
            c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WinSock.h(356) : see previous definition of 'IP_MULTICAST_TTL'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\PlatformSDK\Include\WSPiApi.h(802) : error C3861: 'inet_ntoa': identifier not found, even with argument-dependent lookup
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxsock.h(375) : error C3861: 'WSASetLastError': identifier not found, even with argument-dependent lookup
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxsock.h(396) : error C2440: '=' : cannot convert from 'u_short (__stdcall *)(u_short)' to 'UINT'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxsock.h(396) : error C2440: '=' : cannot convert from 'u_short (__stdcall *)(u_short)' to 'UINT'
    c:\Program Files\Microsoft Visual Studio .NET 2003\Vc7\atlmfc\include\afxsock.h(396) : fatal error C1003: error count exceeds 100; stopping compilation
    The errors are more or less self-explainable, but behind so many errors there is probably some configuration error... Any help?
    Thanks

  2. #2
    Super Moderator VirtualAce's Avatar
    Join Date
    Aug 2001
    Posts
    9,590
    Check the order of your includes. I had this problem where winsock2.h caused 63 redefinition errors. I just changed the order of the includes and it worked.

  3. #3
    Registered User
    Join Date
    Dec 2007
    Posts
    19
    I post my header files, which may help:
    StdAfx.h
    Code:
    // stdafx.h : include file for standard system include files,
    // or project specific include files that are used frequently, but
    // are changed infrequently
    
    #pragma once
    
    #ifndef VC_EXTRALEAN
    #define VC_EXTRALEAN		// Exclude rarely-used stuff from Windows headers
    #endif
    
    // Modify the following defines if you have to target a platform prior to the ones specified below.
    // Refer to MSDN for the latest info on corresponding values for different platforms.
    #ifndef WINVER				// Allow use of features specific to Windows 95 and Windows NT 4 or later.
    #define WINVER 0x0400		// Change this to the appropriate value to target Windows 98 and Windows 2000 or later.
    #endif
    
    #ifndef _WIN32_WINNT		// Allow use of features specific to Windows NT 4 or later.
    #define _WIN32_WINNT 0x0400	// Change this to the appropriate value to target Windows 2000 or later.
    #endif						
    
    #ifndef _WIN32_WINDOWS		// Allow use of features specific to Windows 98 or later.
    #define _WIN32_WINDOWS 0x0410 // Change this to the appropriate value to target Windows Me or later.
    #endif
    
    #ifndef _WIN32_IE			// Allow use of features specific to IE 4.0 or later.
    #define _WIN32_IE 0x0400	// Change this to the appropriate value to target IE 5.0 or later.
    #endif
    
    #define _ATL_CSTRING_EXPLICIT_CONSTRUCTORS	// some CString constructors will be explicit
    
    #include <afxwin.h>         // MFC core and standard components
    #include <afxext.h>         // MFC extensions
    
    #ifndef _AFX_NO_OLE_SUPPORT
    #include <afxole.h>         // MFC OLE classes
    #include <afxodlgs.h>       // MFC OLE dialog classes
    #include <afxdisp.h>        // MFC Automation classes
    #endif // _AFX_NO_OLE_SUPPORT
    
    #ifndef _AFX_NO_DB_SUPPORT
    #include <afxdb.h>			// MFC ODBC database classes
    #endif // _AFX_NO_DB_SUPPORT
    
    #ifndef _AFX_NO_DAO_SUPPORT
    #include <afxdao.h>			// MFC DAO database classes
    #endif // _AFX_NO_DAO_SUPPORT
    
    #include <afxdtctl.h>		// MFC support for Internet Explorer 4 Common Controls
    #ifndef _AFX_NO_AFXCMN_SUPPORT
    #include <afxcmn.h>			// MFC support for Windows Common Controls
    #endif // _AFX_NO_AFXCMN_SUPPORT
    common.h
    Code:
    #define MIFARE_KEYLEN 6
    #define MIFARE_KEYNR 0
    #define MIFARE_BLOCKNR 4
    #define MIFARE_BUFLEN 16
    #define FOUT_FILENAME "C:\\id_name_list.dat"
    #define PORT 6000
    #define SERVER_IP "192.168.1.3"
    
    
    #include <winscard.h>
    
    extern "C"{
    #include <ok.h>
    #include <scardcl.h>
    }
    Reader.h
    Code:
    #include "common.h"
    #include "StdAfx.h"
    #include <afxstr.h>
    #include "NDKClient.h"
    
    
    class CReader:public CNDKClient
    {	
    	public:
    		CReader();
    		~CReader();		
    		void start();
    
    	private:
    		SCARD_READERSTATE sReaderState; //structure storing readers and data being monitored
    		SCARDHANDLE hSHandle;
    		SCARDCONTEXT hSContext;
    		void readAndBroadcastID();
    		void UcharToStr(UCHAR *ucDataBuffer, ULONG ulDataBufLen, char *str);
    
    	private:
    		ULONG lastCardState;
    
    };

  4. #4
    Registered User
    Join Date
    Dec 2007
    Posts
    19
    Thanks Bubba!
    I had:
    Code:
    #include "common.h"
    #include "StdAfx.h"
    #include <afxstr.h>
    #include "NDKClient.h"
    and changed to:
    Code:
    #include "NDKClient.h"
    #include "common.h"
    #include "StdAfx.h"
    #include <afxstr.h>
    and it worked!

    Does that mean, that StdAfx includes networking headers?

  5. #5
    CSharpener vart's Avatar
    Join Date
    Oct 2006
    Location
    Rishon LeZion, Israel
    Posts
    6,473
    if includes windows headers that makes some defines that confuses winsock2 header
    So when possible - winsock header should go before windows.h header
    The first 90% of a project takes 90% of the time,
    the last 10% takes the other 90% of the time.

  6. #6
    Registered User
    Join Date
    Sep 2004
    Location
    California
    Posts
    3,246
    if includes windows headers that makes some defines that confuses winsock2 header
    So when possible - winsock header should go before windows.h header
    winsock2.h already includes windows.h, so the simplest thing to do is just removes your own windows.h includes. Another option is to define _INC_WINDOWS in your project, then it wont matter what order your windows.h and winsock2.h files are included.

Popular pages Recent additions subscribe to a feed

Similar Threads

  1. multiple declarations of functions errors
    By netwizio in forum C Programming
    Replies: 4
    Last Post: 03-07-2004, 08:02 AM
  2. Headers that use each other
    By nickname_changed in forum C++ Programming
    Replies: 7
    Last Post: 10-03-2003, 04:25 AM
  3. Replies: 1
    Last Post: 05-01-2003, 02:52 PM
  4. Socket Project (getting one of multiple clients IP)
    By Cl0wn in forum C Programming
    Replies: 2
    Last Post: 04-05-2003, 11:01 AM
  5. Chat Bot: Multiple headers problem
    By RoD in forum C++ Programming
    Replies: 4
    Last Post: 03-26-2003, 05:07 PM

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21