HINSTANCE hfilter;
LPWSPSTARTUP wspstartupfunc=NULL;
if(lpprotoinfo->ProtocolChain.ChainLen<=1)
{
OutputDebugString(_T("ChainLen<=1"));
return FALSE;
}
getfilter();
for(i=0;i<totalprotos;i++)
{
if(memcmp(&protoinfo[i].ProviderId,&filterguid,sizeof(GUID))==0)
{
layerid=protoinfo[i].dwCatalogEntryId;
break;
}
}
for(i=0;i<lpprotoinfo->ProtocolChain.ChainLen;i++)
{
if(lpprotoinfo->ProtocolChain.ChainEntries[i]==layerid)
{
nextlayerid=lpprotoinfo->ProtocolChain.ChainEntries[i+1];
break;
}
}
filterpathlen=MAX_PATH;
filterpath=(TCHAR*)GlobalAlloc(GPTR,filterpathlen);
for(i=0;i<totalprotos;i++)
{
if(nextlayerid==protoinfo[i].dwCatalogEntryId)
{
if(WSCGetProviderPath(&protoinfo[i].ProviderId,filterpath,&filterpathlen,&errorcode)==SOCKET_ERROR)
{
OutputDebugString(_T("WSCGetProviderPath Error!"));
return WSAEPROVIDERFAILEDINIT;
}
break;
}
}
if(!ExpandEnvironmentStrings(filterpath,filterpath,MAX_PATH))
{
OutputDebugString(_T("ExpandEnvironmentStrings Error!"));
return WSAEPROVIDERFAILEDINIT;
}
if((hfilter=LoadLibrary(filterpath))==NULL)
{
OutputDebugString(_T("LoadLibrary Error!"));
return WSAEPROVIDERFAILEDINIT;
}
if((wspstartupfunc=(LPWSPSTARTUP)GetProcAddress(hfilter,"WSPStartup"))==NULL)
{
OutputDebugString(_T("GetProcessAddress Error!"));
return WSAEPROVIDERFAILEDINIT;
}
if((errorcode=wspstartupfunc(wversionrequested,lpwspdata,lpprotoinfo,upcalltable,lpproctable))!=ERROR_SUCCESS)
{
OutputDebugString(_T("wspstartupfunc Error!"));
return errorcode;
}
nextproctable=*lpproctable;
freefilter();
return 0;
}
3.testBD.exe的源代码
#include <winsock2.h>
#include <stdio.h>
#include <conio.h>
int main()
{
WSADATA wsa;
SOCKET sock;
struct sockaddr_in sin;
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