WSAIoctl, DisconnectEx, WSAID_DISCONNECTEX

hi guys,

need help regarding this,

base on closesocket function in MSDN page,
http://msdn.microsoft.com/en-us/library/windows/desktop/ms737582%28v=vs.85%29.aspx

Paul Sheer wrote:

To flush a sock handle, gracefully close the socket, and release the socket handle in the
background:

DisconnectEx(sock, NULL, 0, 0); // retrieve this function pointer with WSAIoctl(WSAID_DISCONNECTEX).
closesocket(sock);
sock = INVALID_SOCKET; // do not make further use of sock.

Do not use the SO_DONTLINGER or SO_LINGER options.

i attempt to follow his advice because closesocket doesn't seem to work in my case, idk why.

DisconnectEx must be retrieved from WSAIoctl.

Code:

#define IOC_WS2         0x08000000
#define IOC_OUT         0x40000000
#define IOC_IN          0x80000000
#define IOC_INOUT       (IOC_IN | IOC_OUT)
#define _WSAIORW( p1, p2 )  (IOC_INOUT | (p1) | (p2))
#define SIO_GET_EXTENSION_FUNCTION_POINTER  _WSAIORW( IOC_WS2, 6 )

so, i build the following

Code:

IOC_WS2                 = 0x08000000
IOC_OUT                 = 0x40000000
IOC_IN                  = 0x80000000
IOC_INOUT               = IOC_IN or IOC_OUT

mov  eax,IOC_INOUT
or   eax,IOC_WS2
or   eax,6
invoke  WSAIoctl,[sock],eax,

now i am stuck, because the third param for WSAIoctl is DWORD LPVOID lpvInBuffer, suppose to be value of WSAID_DISCONNECTEX is kinda weird.

Quote:

#ifndef WSAID_DISCONNECTEX
#define WSAID_DISCONNECTEX {0x7fda2e11,0x8630,0x436f,{0xa0, 0x31, 0xf5, 0x36, 0xa6, 0xee, 0xc1, 0x57}}
typedef BOOL (WINAPI *LPFN_DISCONNECTEX)(SOCKET, LPOVERLAPPED, DWORD, DWORD);
#endif

how am i suppose to define WSAID_DISCONNECTEX ?

Code:

WSAID_DISCONNECTEX dd 0x7FDA2E11
                                 dw 0x8630,0x436F
                                 db 0xA0,0x31,0xF5,0x36,0xA6,0xEE,0xC1,0x57

any idea?

references:
http://www.asmcommunity.net/board/index.php?topic=25434.0

http://www.openwatcom.org:4000/@md=d&cd=//&cdf=//depot/openwatcom/bld/w32api/include/ws2def.mh&ra=s&rc=s&c=3UY@//depot/openwatcom/bld/w32api/include/ws2def.mh?ac=64&rev1=1

http://spserver.googlecode.com/svn-history/r133/trunk/spserver/spwin32port.hpp