lsp添加协议链问题

BOOL InstallProvider(WCHAR *pwszPathName)
{
WCHAR wszLSPName[] = L"MyFirstLSP";
LPWSAPROTOCOL_INFOW pProtoInfo;
int nProtocols;
WSAPROTOCOL_INFOW OriginalProtocolInfo[3];
DWORD    dwOrigCatalogId[3];
int nArrayCount = 0;
DWORD dwLayeredCatalogId;  
int nError;
pProtoInfo = GetProvider(&nProtocols);
BOOL bFindUdp = FALSE;
BOOL bFindTcp = FALSE;
BOOL bFindRaw = FALSE;
for(int i=0; i<nProtocols; i++)
{
if(pProtoInfo[i].iAddressFamily == AF_INET)
{
if(!bFindUdp && pProtoInfo[i].iProtocol == IPPROTO_UDP)
{
memcpy(&OriginalProtocolInfo[nArrayCount], &pProtoInfo[i], sizeof(WSAPROTOCOL_INFOW));
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 = 
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 & (~XP1_IFS_HANDLES); 

dwOrigCatalogId[nArrayCount++] = pProtoInfo[i].dwCatalogEntryId;

bFindUdp = TRUE;
}

if(!bFindTcp && pProtoInfo[i].iProtocol == IPPROTO_TCP)
{
memcpy(&OriginalProtocolInfo[nArrayCount], &pProtoInfo[i], sizeof(WSAPROTOCOL_INFOW));
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 = 
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 & (~XP1_IFS_HANDLES); 

dwOrigCatalogId[nArrayCount++] = pProtoInfo[i].dwCatalogEntryId;

bFindTcp = TRUE;
} 
if(!bFindRaw && pProtoInfo[i].iProtocol == IPPROTO_IP)
{
memcpy(&OriginalProtocolInfo[nArrayCount], &pProtoInfo[i], sizeof(WSAPROTOCOL_INFOW));
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 = 
OriginalProtocolInfo[nArrayCount].dwServiceFlags1 & (~XP1_IFS_HANDLES); 

dwOrigCatalogId[nArrayCount++] = pProtoInfo[i].dwCatalogEntryId;

bFindRaw = TRUE;
}
}
}

WSAPROTOCOL_INFOW LayeredProtocolInfo;
memcpy(&LayeredProtocolInfo, &OriginalProtocolInfo[0], sizeof(WSAPROTOCOL_INFOW));
wcscpy(LayeredProtocolInfo.szProtocol, wszLSPName);
LayeredProtocolInfo.ProtocolChain.ChainLen = LAYERED_PROTOCOL; // 0;
LayeredProtocolInfo.dwProviderFlags |= PFL_HIDDEN;
if(::WSCInstallProvider(&ProviderGuid, 
pwszPathName, &LayeredProtocolInfo, 1, &nError) == SOCKET_ERROR)
{
return FALSE;
}
FreeProvider(pProtoInfo);
pProtoInfo = GetProvider(&nProtocols);
for(i=0; i<nProtocols; i++)
{
if(memcmp(&pProtoInfo[i].ProviderId, &ProviderGuid, sizeof(ProviderGuid)) == 0)
{
dwLayeredCatalogId = pProtoInfo[i].dwCatalogEntryId;
break;
}
}
WCHAR wszChainName[WSAPROTOCOL_LEN + 1];
for(i=0; i<nArrayCount; i++)
{
swprintf(wszChainName, L"%ws over %ws", wszLSPName, OriginalProtocolInfo[i].szProtocol);
wcscpy(OriginalProtocolInfo[i].szProtocol, wszChainName);
if(OriginalProtocolInfo[i].ProtocolChain.ChainLen == 1)
{
OriginalProtocolInfo[i].ProtocolChain.ChainEntries[1] = dwOrigCatalogId[i];
}
else
{
for(int j = OriginalProtocolInfo[i].ProtocolChain.ChainLen; j>0; j--)
{
OriginalProtocolInfo[i].ProtocolChain.ChainEntries[j] 
= OriginalProtocolInfo[i].ProtocolChain.ChainEntries[j-1];
}
}
OriginalProtocolInfo[i].ProtocolChain.ChainLen ++;
                 此处 OriginalProtocolInfo[i].ProtocolChain.ChainLen可能为1吗 问什么 ;
                  OriginalProtocolInfo[i].ProtocolChain.ChainEntries[0] = dwLayeredCatalogId; 
}
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return TRUE;
}