void CParaNdisTX::CompleteOutstandingNBLChain(PNET_BUFFER_LIST NBL, ULONG Flags)
{
ULONG NBLNum = ParaNdis_CountNBLs(NBL);
ParaNdis_CompleteNBLChain(m_Context->MiniportHandle, NBL, Flags);
m_StateMachine.UnregisterOutstandingItems(NBLNum);
}
/**********************************************************
NDIS procedure of returning us buffer of previously indicated packets
Parameters:
context
PNET_BUFFER_LIST pNBL - list of buffers to free
returnFlags - is dpc
The procedure frees:
received buffer descriptors back to list of RX buffers
all the allocated MDL structures
all the received NBLs back to our pool
***********************************************************/
VOID ParaNdis6_ReturnNetBufferLists(
NDIS_HANDLE miniportAdapterContext,
PNET_BUFFER_LIST pNBL,
ULONG returnFlags)
{
PARANDIS_ADAPTER *pContext = (PARANDIS_ADAPTER *)miniportAdapterContext;
auto NumNBLs = ParaNdis_CountNBLs(pNBL);
UNREFERENCED_PARAMETER(returnFlags);
DEBUG_ENTRY(5);
ParaNdis_ReuseRxNBLs(pNBL);
pContext->m_RxStateMachine.UnregisterOutstandingItems(NumNBLs);
}
void CParaNdisTX::Send(PNET_BUFFER_LIST NBL)
{
PNET_BUFFER_LIST nextNBL = nullptr;
NDIS_STATUS RejectionStatus = NDIS_STATUS_FAILURE;
if (!m_StateMachine.RegisterOutstandingItems(ParaNdis_CountNBLs(NBL), &RejectionStatus))
{
ParaNdis_CompleteNBLChainWithStatus(m_Context->MiniportHandle, NBL, RejectionStatus);
return;
}
for(auto currNBL = NBL; currNBL != nullptr; currNBL = nextNBL)
{
nextNBL = NET_BUFFER_LIST_NEXT_NBL(currNBL);
NET_BUFFER_LIST_NEXT_NBL(currNBL) = nullptr;
auto NBLHolder = new (m_Context->MiniportHandle) CNBL(currNBL, m_Context, *this);
if (NBLHolder == nullptr)
{
currNBL->Status = NDIS_STATUS_RESOURCES;
CompleteOutstandingNBLChain(currNBL);
DPrintf(0, ("ERROR: Failed to allocate CNBL instance\n"));
continue;
}
if(NBLHolder->Prepare() &&
ParaNdis_IsSendPossible(m_Context))
{
NBLHolder->StartMapping();
}
else
{
NBLHolder->SetStatus(ParaNdis_ExactSendFailureStatus(m_Context));
NBLHolder->Release();
}
}
}
