mirror of
https://github.com/reactos/reactos.git
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160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/*
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* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS TCP/IP protocol driver
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* FILE: datalink/loopback.c
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* PURPOSE: Loopback adapter
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* PROGRAMMERS: Casper S. Hornstrup (chorns@users.sourceforge.net)
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* REVISIONS:
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* CSH 01/08-2000 Created
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*/
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#include "precomp.h"
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PIP_INTERFACE Loopback = NULL;
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VOID LoopPassiveWorker(
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PVOID Context)
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{
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PIP_PACKET IPPacket = Context;
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/* IPReceive() takes care of the NDIS packet */
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IPReceive(Loopback, IPPacket);
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ExFreePool(IPPacket);
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}
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VOID LoopTransmit(
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PVOID Context,
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PNDIS_PACKET NdisPacket,
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UINT Offset,
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PVOID LinkAddress,
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USHORT Type)
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/*
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* FUNCTION: Transmits a packet
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* ARGUMENTS:
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* Context = Pointer to context information (NULL)
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* NdisPacket = Pointer to NDIS packet to send
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* Offset = Offset in packet where packet data starts
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* LinkAddress = Pointer to link address
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* Type = LAN protocol type (unused)
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*/
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{
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PCHAR PacketBuffer;
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UINT PacketLength;
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PNDIS_PACKET XmitPacket;
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NDIS_STATUS NdisStatus;
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PIP_PACKET IPPacket;
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ASSERT_KM_POINTER(NdisPacket);
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ASSERT_KM_POINTER(PC(NdisPacket));
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ASSERT_KM_POINTER(PC(NdisPacket)->DLComplete);
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TI_DbgPrint(MAX_TRACE, ("Called (NdisPacket = %x)\n", NdisPacket));
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GetDataPtr( NdisPacket, 0, &PacketBuffer, &PacketLength );
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NdisStatus = AllocatePacketWithBuffer
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( &XmitPacket, PacketBuffer, PacketLength );
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if( NT_SUCCESS(NdisStatus) ) {
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IPPacket = ExAllocatePool(NonPagedPool, sizeof(IP_PACKET));
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if (IPPacket)
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{
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IPInitializePacket(IPPacket, 0);
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IPPacket->NdisPacket = XmitPacket;
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GetDataPtr(IPPacket->NdisPacket,
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0,
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(PCHAR*)&IPPacket->Header,
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&IPPacket->TotalSize);
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IPPacket->MappedHeader = TRUE;
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if (!ChewCreate(LoopPassiveWorker, IPPacket))
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{
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IPPacket->Free(IPPacket);
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ExFreePool(IPPacket);
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NdisStatus = NDIS_STATUS_RESOURCES;
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}
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}
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else
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NdisStatus = NDIS_STATUS_RESOURCES;
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}
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(PC(NdisPacket)->DLComplete)
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( PC(NdisPacket)->Context, NdisPacket, NdisStatus );
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}
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NDIS_STATUS LoopRegisterAdapter(
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PNDIS_STRING AdapterName,
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PLAN_ADAPTER *Adapter)
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/*
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* FUNCTION: Registers loopback adapter with the network layer
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* ARGUMENTS:
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* AdapterName = Unused
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* Adapter = Unused
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* RETURNS:
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* Status of operation
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*/
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{
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LLIP_BIND_INFO BindInfo;
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TI_DbgPrint(MID_TRACE, ("Called.\n"));
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/* Bind the adapter to network (IP) layer */
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BindInfo.Context = NULL;
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BindInfo.HeaderSize = 0;
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BindInfo.MinFrameSize = 0;
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BindInfo.Address = NULL;
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BindInfo.AddressLength = 0;
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BindInfo.Transmit = LoopTransmit;
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Loopback = IPCreateInterface(&BindInfo);
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if (!Loopback) return NDIS_STATUS_RESOURCES;
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Loopback->MTU = 16384;
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Loopback->Name.Buffer = L"Loopback";
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Loopback->Name.MaximumLength = Loopback->Name.Length =
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wcslen(Loopback->Name.Buffer) * sizeof(WCHAR);
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AddrInitIPv4(&Loopback->Unicast, LOOPBACK_ADDRESS_IPv4);
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AddrInitIPv4(&Loopback->Netmask, LOOPBACK_ADDRMASK_IPv4);
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AddrInitIPv4(&Loopback->Broadcast, LOOPBACK_BCASTADDR_IPv4);
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IPRegisterInterface(Loopback);
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IPAddInterfaceRoute(Loopback);
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TI_DbgPrint(MAX_TRACE, ("Leaving.\n"));
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return NDIS_STATUS_SUCCESS;
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}
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NDIS_STATUS LoopUnregisterAdapter(
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PLAN_ADAPTER Adapter)
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/*
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* FUNCTION: Unregisters loopback adapter with the network layer
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* ARGUMENTS:
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* Adapter = Unused
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* RETURNS:
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* Status of operation
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* NOTES:
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* Does not care wether we have registered loopback adapter
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*/
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{
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TI_DbgPrint(MID_TRACE, ("Called.\n"));
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if (Loopback != NULL)
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{
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IPUnregisterInterface(Loopback);
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IPDestroyInterface(Loopback);
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Loopback = NULL;
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}
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TI_DbgPrint(MAX_TRACE, ("Leaving.\n"));
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return NDIS_STATUS_SUCCESS;
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}
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