Thread: Conflicting winsock.h and winsock2.h

Hi, I've got this situation here:

My application uses a static lib that in turn includes winsock2.h. It worked fine until I've got some adjustment on the main application to include the windows.h. Now all of these errors came out:

3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(91) : warning C4005: 'AF_IPX' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(460) : see previous definition of 'AF_IPX'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(131) : warning C4005: 'AF_MAX' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(479) : see previous definition of 'AF_MAX'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(168) : warning C4005: 'SO_DONTLINGER' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(402) : see previous definition of 'SO_DONTLINGER'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(212) : error C2011: 'sockaddr' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(485) : see declaration of 'sockaddr'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(390) : error C2143: syntax error : missing '}' before 'constant'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(390) : error C2143: syntax error : missing ';' before 'constant'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(390) : error C2059: syntax error : 'constant'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(443) : error C2143: syntax error : missing ';' before '}'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(443) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(443) : error C4430: missing type specifier - int assumed. Note: C++ does not support default-int
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(524) : warning C4005: 'IN_CLASSA' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(287) : see previous definition of 'IN_CLASSA'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(530) : warning C4005: 'IN_CLASSB' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(293) : see previous definition of 'IN_CLASSB'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(536) : warning C4005: 'IN_CLASSC' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(299) : see previous definition of 'IN_CLASSC'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(547) : warning C4005: 'INADDR_ANY' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(304) : see previous definition of 'INADDR_ANY'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(549) : warning C4005: 'INADDR_BROADCAST' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(306) : see previous definition of 'INADDR_BROADCAST'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\ws2def.h(583) : error C2011: 'sockaddr_in' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(312) : see declaration of 'sockaddr_in'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(132) : error C2011: 'fd_set' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(68) : see declaration of 'fd_set'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(167) : warning C4005: 'FD_SET' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(102) : see previous definition of 'FD_SET'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(176) : error C2011: 'timeval' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(111) : see declaration of 'timeval'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(232) : error C2011: 'hostent' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(167) : see declaration of 'hostent'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(245) : error C2011: 'netent' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(180) : see declaration of 'netent'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(252) : error C2011: 'servent' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(187) : see declaration of 'servent'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(264) : error C2011: 'protoent' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(199) : see declaration of 'protoent'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(360) : error C2011: 'WSAData' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(322) : see declaration of 'WSAData'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(458) : error C2011: 'sockproto' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(494) : see declaration of 'sockproto'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(500) : error C2011: 'linger' : 'struct' type redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(531) : see declaration of 'linger'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(513) : warning C4005: 'SOMAXCONN' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(544) : see previous definition of 'SOMAXCONN'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(542) : warning C4005: 'FD_READ' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(562) : see previous definition of 'FD_READ'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(545) : warning C4005: 'FD_WRITE' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(563) : see previous definition of 'FD_WRITE'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(548) : warning C4005: 'FD_OOB' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(564) : see previous definition of 'FD_OOB'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(551) : warning C4005: 'FD_ACCEPT' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(565) : see previous definition of 'FD_ACCEPT'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(554) : warning C4005: 'FD_CONNECT' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(566) : see previous definition of 'FD_CONNECT'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(557) : warning C4005: 'FD_CLOSE' : macro redefinition
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(567) : see previous definition of 'FD_CLOSE'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1578) : error C2375: 'accept' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(742) : see declaration of 'accept'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1600) : error C2375: 'bind' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(747) : see declaration of 'bind'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1619) : error C2375: 'closesocket' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(752) : see declaration of 'closesocket'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1638) : error C2375: 'connect' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(754) : see declaration of 'connect'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1659) : error C2375: 'ioctlsocket' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(759) : see declaration of 'ioctlsocket'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1680) : error C2375: 'getpeername' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(764) : see declaration of 'getpeername'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1701) : error C2375: 'getsockname' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(769) : see declaration of 'getsockname'
3>C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock2.h(1724) : error C2375: 'getsockopt' : redefinition; different linkage
3> C:\Program Files\Microsoft SDKs\Windows\v7.1\Include\winsock.h(774) : see declaration of 'getsockopt'
...

Now I've searched the web and they said to define WIN_LEAN_AND_MEAN. I've tried that and it still didn't work. I also tried to define WIN_LEAN_AND_MEAN in the static lib, and the library itself can't be compiled. So, can anyone help me? Thanks in advance.

1) winsock2 supercedes winsock.

2) For reasons that make no sense to me, you have to include winsock2.h before windows.h

3) You probably need to use include guards in your header files to prevent including the same delarations more than once...

Code:

#ifndef HEADER_FILE_NAME
#define HEADER_FILE_NAME

#include <winsock2.h>
#include <windows.h>  // yes the order matters


// body of declarations

#endif //HEADER_FILE_NAME

4) The correct define is WIN32_LEAN_AND_MEAN which probably wouldn't help you in this situation.

Originally Posted by CommonTater

2) For reasons that make no sense to me, you have to include winsock2.h before windows.h

It's because windows.h unfortunately includes winsock.h.

The easiest way to get around this problem is to not include windows.h in your code anywhere. winsock2.h will automatically include windows.h for you.

First, my bad what I meant was indeed WIN32_LEAN_AND_MEAN. :P

Second, like SMurf said, if WIN32_LEAN_AND_MEAN, winsock.h won't be included.

Thirdly, I've solved my problem. ^_^ Actually I've got 3 libraries that I am using. Delta 3D, Jetbyte Tools for the Socket Programming, and Logitech SDK for the controller. At first, the Logitech SDK is not being used so it's fine. But now with the SDK, I have to include windows.h. My fault was I defined WIN32_LEAN_AND_MEAN on both libraries, the Jetbyte Tools and Logitech SDK. But after I analyzed it thoroughly, it was because I'm also including a header from OSG, one of the dependencies of Delta 3D. And in that header there's no definition of WIN32_LEAN_AND_MEAN at all (and thus the winsock.h was included). So I decided to define it above my main function instead.

Thanks a lot tho guys. Sorry for the inconvenience.

Double post. Sorry...