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No se puede incluir Winsock2.h en MSVC 2010

Question

No puedo incluir WinSock2.h en un proyecto de msvc ++ 2010. Al principio pensé que era algo que estaba haciendo mal, así que creé un proyecto vacío para probar mi cordura. El proyecto vacío es el siguiente

#include <Windows.h>
#include <WinSock2.h>


int main(void){

    system("echo Hello World");
    system("pause");
    return 0;

};

Se compila y funciona bien sin la línea #include <WinSock2.h> pero falla con una larga lista de errores cuando intento incluir WinSock2.h.

Errores:

1>  Main.cpp
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(91): warning C4005: ''AF_IPX'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(460) : see previous definition of ''AF_IPX''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(131): warning C4005: ''AF_MAX'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(479) : see previous definition of ''AF_MAX''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(168): warning C4005: ''SO_DONTLINGER'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(402) : see previous definition of ''SO_DONTLINGER''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(212): error C2011: ''sockaddr'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(485) : see declaration of ''sockaddr''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(390): error C2059: syntax error : ''constant''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(390): error C3805: ''constant'': unexpected token, expected either ''}'' or a '',''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(524): warning C4005: ''IN_CLASSA'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(287) : see previous definition of ''IN_CLASSA''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(530): warning C4005: ''IN_CLASSB'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(293) : see previous definition of ''IN_CLASSB''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(536): warning C4005: ''IN_CLASSC'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(299) : see previous definition of ''IN_CLASSC''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(547): warning C4005: ''INADDR_ANY'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(304) : see previous definition of ''INADDR_ANY''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(549): warning C4005: ''INADDR_BROADCAST'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(306) : see previous definition of ''INADDR_BROADCAST''
1>c:/program files/microsoft sdks/windows/v7.0a/include/ws2def.h(583): error C2011: ''sockaddr_in'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(312) : see declaration of ''sockaddr_in''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(132): error C2011: ''fd_set'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(68) : see declaration of ''fd_set''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(167): warning C4005: ''FD_SET'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(102) : see previous definition of ''FD_SET''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(176): error C2011: ''timeval'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(111) : see declaration of ''timeval''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(232): error C2011: ''hostent'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(167) : see declaration of ''hostent''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(245): error C2011: ''netent'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(180) : see declaration of ''netent''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(252): error C2011: ''servent'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(187) : see declaration of ''servent''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(264): error C2011: ''protoent'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(199) : see declaration of ''protoent''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(360): error C2011: ''WSAData'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(322) : see declaration of ''WSAData''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(458): error C2011: ''sockproto'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(494) : see declaration of ''sockproto''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(500): error C2011: ''linger'' : ''struct'' type redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(531) : see declaration of ''linger''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(513): warning C4005: ''SOMAXCONN'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(544) : see previous definition of ''SOMAXCONN''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(542): warning C4005: ''FD_READ'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(562) : see previous definition of ''FD_READ''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(545): warning C4005: ''FD_WRITE'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(563) : see previous definition of ''FD_WRITE''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(548): warning C4005: ''FD_OOB'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(564) : see previous definition of ''FD_OOB''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(551): warning C4005: ''FD_ACCEPT'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(565) : see previous definition of ''FD_ACCEPT''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(554): warning C4005: ''FD_CONNECT'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(566) : see previous definition of ''FD_CONNECT''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(557): warning C4005: ''FD_CLOSE'' : macro redefinition
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(567) : see previous definition of ''FD_CLOSE''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1578): error C2375: ''accept'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(742) : see declaration of ''accept''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1600): error C2375: ''bind'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(747) : see declaration of ''bind''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1619): error C2375: ''closesocket'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(752) : see declaration of ''closesocket''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1638): error C2375: ''connect'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(754) : see declaration of ''connect''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1659): error C2375: ''ioctlsocket'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(759) : see declaration of ''ioctlsocket''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1680): error C2375: ''getpeername'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(764) : see declaration of ''getpeername''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1701): error C2375: ''getsockname'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(769) : see declaration of ''getsockname''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1724): error C2375: ''getsockopt'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(774) : see declaration of ''getsockopt''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1745): error C2375: ''htonl'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(781) : see declaration of ''htonl''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1762): error C2375: ''htons'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(783) : see declaration of ''htons''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1780): error C2375: ''inet_addr'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(785) : see declaration of ''inet_addr''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1797): error C2375: ''inet_ntoa'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(787) : see declaration of ''inet_ntoa''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1815): error C2375: ''listen'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(789) : see declaration of ''listen''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1833): error C2375: ''ntohl'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(793) : see declaration of ''ntohl''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1850): error C2375: ''ntohs'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(795) : see declaration of ''ntohs''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1870): error C2375: ''recv'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(797) : see declaration of ''recv''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1895): error C2375: ''recvfrom'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(803) : see declaration of ''recvfrom''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1921): error C2375: ''select'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(811) : see declaration of ''select''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1945): error C2375: ''send'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(818) : see declaration of ''send''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1970): error C2375: ''sendto'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(824) : see declaration of ''sendto''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(1996): error C2375: ''setsockopt'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(832) : see declaration of ''setsockopt''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2018): error C2375: ''shutdown'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(839) : see declaration of ''shutdown''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2039): error C2375: ''socket'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(843) : see declaration of ''socket''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2063): error C2375: ''gethostbyaddr'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(850) : see declaration of ''gethostbyaddr''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2083): error C2375: ''gethostbyname'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(855) : see declaration of ''gethostbyname''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2101): error C2375: ''gethostname'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(857) : see declaration of ''gethostname''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2121): error C2375: ''getservbyport'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(861) : see declaration of ''getservbyport''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2141): error C2375: ''getservbyname'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(865) : see declaration of ''getservbyname''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2160): error C2375: ''getprotobynumber'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(869) : see declaration of ''getprotobynumber''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2178): error C2375: ''getprotobyname'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(871) : see declaration of ''getprotobyname''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2200): error C2375: ''WSAStartup'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(875) : see declaration of ''WSAStartup''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2219): error C2375: ''WSACleanup'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(879) : see declaration of ''WSACleanup''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2236): error C2375: ''WSASetLastError'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(881) : see declaration of ''WSASetLastError''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2253): error C2375: ''WSAGetLastError'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(883) : see declaration of ''WSAGetLastError''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2270): error C2375: ''WSAIsBlocking'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(885) : see declaration of ''WSAIsBlocking''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2287): error C2375: ''WSAUnhookBlockingHook'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(887) : see declaration of ''WSAUnhookBlockingHook''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2304): error C2375: ''WSASetBlockingHook'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(889) : see declaration of ''WSASetBlockingHook''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2321): error C2375: ''WSACancelBlockingCall'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(891) : see declaration of ''WSACancelBlockingCall''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2343): error C2375: ''WSAAsyncGetServByName'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(893) : see declaration of ''WSAAsyncGetServByName''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2370): error C2375: ''WSAAsyncGetServByPort'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(901) : see declaration of ''WSAAsyncGetServByPort''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2396): error C2375: ''WSAAsyncGetProtoByName'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(909) : see declaration of ''WSAAsyncGetProtoByName''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2421): error C2375: ''WSAAsyncGetProtoByNumber'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(916) : see declaration of ''WSAAsyncGetProtoByNumber''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2446): error C2375: ''WSAAsyncGetHostByName'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(923) : see declaration of ''WSAAsyncGetHostByName''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2473): error C2375: ''WSAAsyncGetHostByAddr'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(930) : see declaration of ''WSAAsyncGetHostByAddr''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2496): error C2375: ''WSACancelAsyncRequest'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(939) : see declaration of ''WSACancelAsyncRequest''
1>c:/program files/microsoft sdks/windows/v7.0a/include/winsock2.h(2517): error C2375: ''WSAAsyncSelect'' : redefinition; different linkage
1>          c:/program files/microsoft sdks/windows/v7.0a/include/winsock.h(941) : see declaration of ''WSAAsyncSelect''
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

Supongo que Microsoft no distribuirá archivos de encabezado incorrectos en su SDK, ¿qué está pasando?

Answer 1

Creo que está obteniendo estos errores porque windows.h incluirá winsock.h. Invierta el orden de sus inclusiones para que WinSock2.h venga antes que windows.h. WinSock2.h tiene algunos #defines para evitar que windows.h incluya winsock.h

Answer 2

Me aseguré de que #incluye "Winsock2.h" antes de cualquier #include "windows.h" y "#include" Winsock.h "y esto resolvió el caso.

Solo una cuestión de paciencia, mira incluye uno por uno y establece este orden, primero #include "Winsock2.h" y luego #include "windows.h"

Revisé el recursivo incluye, vi los archivos de encabezado que incluyen (recursivamente) algunos #include "windows.h" y "#include" Winsock.h "y escribo un # include" Winsock2.h "en estos archivos, agregué #include "Winsock2.h" `como el primer include.