loopback.c File Reference

#include "precomp.h"

Include dependency graph for loopback.c:

Go to the source code of this file.

Functions
VOID	LoopPassiveWorker (PVOID Context)
VOID	LoopTransmit (PVOID Context, PNDIS_PACKET NdisPacket, UINT Offset, PVOID LinkAddress, USHORT Type)
NDIS_STATUS	LoopRegisterAdapter (PNDIS_STRING AdapterName, PLAN_ADAPTER *Adapter)
NDIS_STATUS	LoopUnregisterAdapter (PLAN_ADAPTER Adapter)

Variables
PIP_INTERFACE	Loopback = NULL

Function Documentation

LoopPassiveWorker()

VOID LoopPassiveWorker

(

PVOID

Context

)

Definition at line 15 of file loopback.c.

{
  PIP_PACKET IPPacket = Context;
 
  /* IPReceive() takes care of the NDIS packet */
  IPReceive(Loopback, IPPacket);
 
  ExFreePool(IPPacket);
}

Referenced by LoopTransmit().

LoopRegisterAdapter()

NDIS_STATUS LoopRegisterAdapter	(	PNDIS_STRING	AdapterName,
		PLAN_ADAPTER *	Adapter
	)

Definition at line 96 of file loopback.c.

{
  LLIP_BIND_INFO BindInfo;
 
  TI_DbgPrint(MID_TRACE, ("Called.\n"));
 
  /* Bind the adapter to network (IP) layer */
  BindInfo.Context = NULL;
  BindInfo.HeaderSize = 0;
  BindInfo.MinFrameSize = 0;
  BindInfo.Address = NULL;
  BindInfo.AddressLength = 0;
  BindInfo.Transmit = LoopTransmit;
 
  Loopback = IPCreateInterface(&BindInfo);
  if (!Loopback) return NDIS_STATUS_RESOURCES;
 
  Loopback->MTU = 16384;
 
  Loopback->Name.Buffer = L"Loopback";
  Loopback->Name.MaximumLength = Loopback->Name.Length =
      (USHORT)wcslen(Loopback->Name.Buffer) * sizeof(WCHAR);
 
  AddrInitIPv4(&Loopback->Unicast, LOOPBACK_ADDRESS_IPv4);
  AddrInitIPv4(&Loopback->Netmask, LOOPBACK_ADDRMASK_IPv4);
  AddrInitIPv4(&Loopback->Broadcast, LOOPBACK_BCASTADDR_IPv4);
 
  IPRegisterInterface(Loopback);
 
  IPAddInterfaceRoute(Loopback);
 
  TI_DbgPrint(MAX_TRACE, ("Leaving.\n"));
 
  return NDIS_STATUS_SUCCESS;
}

Referenced by DriverEntry().

LoopTransmit()

VOID LoopTransmit	(	PVOID	Context,
		PNDIS_PACKET	NdisPacket,
		UINT	Offset,
		PVOID	LinkAddress,
		USHORT	Type
	)

Definition at line 26 of file loopback.c.

{
    PCHAR PacketBuffer;
    UINT PacketLength;
    PNDIS_PACKET XmitPacket;
    NDIS_STATUS NdisStatus;
    PIP_PACKET IPPacket;
 
    ASSERT_KM_POINTER(NdisPacket);
    ASSERT_KM_POINTER(PC(NdisPacket));
    ASSERT_KM_POINTER(PC(NdisPacket)->DLComplete);
 
    if (Type != LAN_PROTO_IPv4)
    {
        TI_DbgPrint(MAX_TRACE, ("Received unsupported protocol %u\n", Type));
        PC(NdisPacket)->DLComplete(PC(NdisPacket)->Context, NdisPacket, NDIS_STATUS_NOT_SUPPORTED);
        return;
    }
 
    TI_DbgPrint(MAX_TRACE, ("Called (NdisPacket = %x)\n", NdisPacket));
 
    GetDataPtr( NdisPacket, 0, &PacketBuffer, &PacketLength );
 
    NdisStatus = AllocatePacketWithBuffer
        ( &XmitPacket, PacketBuffer, PacketLength );
 
    if( NT_SUCCESS(NdisStatus) ) {
        IPPacket = ExAllocatePool(NonPagedPool, sizeof(IP_PACKET));
        if (IPPacket)
        {
            IPInitializePacket(IPPacket, 0);
 
            IPPacket->NdisPacket = XmitPacket;
 
            GetDataPtr(IPPacket->NdisPacket,
                       0,
                       (PCHAR*)&IPPacket->Header,
                       &IPPacket->TotalSize);
 
            IPPacket->MappedHeader = TRUE;
 
            if (!ChewCreate(LoopPassiveWorker, IPPacket))
            {
                IPPacket->Free(IPPacket);
                ExFreePool(IPPacket);
                NdisStatus = NDIS_STATUS_RESOURCES;
            }
        }
        else
            NdisStatus = NDIS_STATUS_RESOURCES;
    }
 
    (PC(NdisPacket)->DLComplete)
        ( PC(NdisPacket)->Context, NdisPacket, NdisStatus );
}

Referenced by LoopRegisterAdapter().

LoopUnregisterAdapter()

NDIS_STATUS LoopUnregisterAdapter

(

PLAN_ADAPTER

Adapter

)

Definition at line 143 of file loopback.c.

{
  TI_DbgPrint(MID_TRACE, ("Called.\n"));
 
  if (Loopback != NULL)
    {
      IPUnregisterInterface(Loopback);
      IPDestroyInterface(Loopback);
      Loopback = NULL;
    }
 
  TI_DbgPrint(MAX_TRACE, ("Leaving.\n"));
 
  return NDIS_STATUS_SUCCESS;
}

Referenced by TiUnload().

Variable Documentation

Loopback

PIP_INTERFACE Loopback = NULL

Definition at line 13 of file loopback.c.

Referenced by GetDefaultInterface(), InfoTdiQueryGetInterfaceMIB(), InfoTdiSetRoute(), InsertTDIInterfaceEntity(), IPAddInterfaceRoute(), LoopPassiveWorker(), LoopRegisterAdapter(), and LoopUnregisterAdapter().