339 lines
12 KiB
C
339 lines
12 KiB
C
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/*++
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Copyright (c) 2000-2000 Microsoft Corporation
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Module Name:
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Query.c
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Abstract:
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This module implements Query handling routines
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for the PGM Transport
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Author:
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Mohammad Shabbir Alam (MAlam) 3-30-2000
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Revision History:
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--*/
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#include "precomp.h"
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//******************* Pageable Routine Declarations ****************
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#ifdef ALLOC_PRAGMA
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// #pragma alloc_text(PAGE, PgmQueryInformation) Should not be pageable!
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#endif
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//******************* Pageable Routine Declarations ****************
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//----------------------------------------------------------------------------
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NTSTATUS
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QueryAddressCompletion(
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IN PDEVICE_OBJECT pDeviceContext,
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IN PIRP pIrp,
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IN PVOID Context
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)
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/*++
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Routine Description:
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This routine handles the completion event when the Query address
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Information completes.
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Arguments:
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IN pDeviceContext -- unused.
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IN pIrp -- Supplies Irp that the transport has finished processing.
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IN Context -- not used
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Return Value:
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NTSTATUS - Final status of the set event operation
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--*/
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{
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tTDI_QUERY_ADDRESS_INFO *pTdiQueryInfo;
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PIO_STACK_LOCATION pIrpSp = IoGetCurrentIrpStackLocation(pIrp);
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tCOMMON_SESSION_CONTEXT *pSession = pIrpSp->FileObject->FsContext;
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if ((NT_SUCCESS (pIrp->IoStatus.Status)) &&
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(pTdiQueryInfo = (tTDI_QUERY_ADDRESS_INFO *) MmGetSystemAddressForMdlSafe (pIrp->MdlAddress,
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HighPagePriority)))
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{
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if (PGM_VERIFY_HANDLE3 (pSession, PGM_VERIFY_SESSION_UNASSOCIATED,
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PGM_VERIFY_SESSION_SEND, PGM_VERIFY_SESSION_RECEIVE))
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{
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PgmLog (PGM_LOG_INFORM_ALL_FUNCS, DBG_QUERY, "QueryAddressCompletion",
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"Tdi IpAddress=<%x>, Port=<%x>\n",
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((PTDI_ADDRESS_IP) &pTdiQueryInfo->IpAddress.Address[0].Address)->in_addr,
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((PTDI_ADDRESS_IP) &pTdiQueryInfo->IpAddress.Address[0].Address)->sin_port);
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//
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// Save the transport's address information in our own structure!
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//
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pSession->TdiIpAddress =((PTDI_ADDRESS_IP) &pTdiQueryInfo->IpAddress.Address[0].Address)->in_addr;
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pSession->TdiPort = ((PTDI_ADDRESS_IP) &pTdiQueryInfo->IpAddress.Address[0].Address)->sin_port;
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}
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else
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "QueryAddressCompletion",
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"Invalid Session Context <%x>\n", pSession);
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}
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}
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else
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "QueryAddressCompletion",
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"Transport returned <%x>, pTdiQueryInfo=<%x>\n", pIrp->IoStatus.Status, pTdiQueryInfo);
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}
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//
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// Must return a non-error status otherwise the IO system will not copy
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// back into the users buffer.
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//
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return (STATUS_SUCCESS);
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}
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//----------------------------------------------------------------------------
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NTSTATUS
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QueryProviderCompletion(
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IN PDEVICE_OBJECT pDeviceContext,
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IN PIRP pIrp,
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IN PVOID Context
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)
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/*++
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Routine Description:
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This routine handles the completion event when the Query Provider
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Information completes. This routine must decrement the MaxDgramSize
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and max send size by the respective NBT header sizes.
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Arguments:
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IN pDeviceContext -- unused.
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IN pIrp -- Supplies Irp that the transport has finished processing.
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IN Context -- not used
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Return Value:
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The final status from the operation (success or an exception).
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--*/
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{
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PTDI_PROVIDER_INFO pProvider;
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if ((NT_SUCCESS (pIrp->IoStatus.Status)) &&
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(pProvider = (PTDI_PROVIDER_INFO) MmGetSystemAddressForMdlSafe (pIrp->MdlAddress, HighPagePriority)))
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{
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//
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// Set the correct service flags to indicate what Pgm supports.
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//
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pProvider->ServiceFlags = TDI_SERVICE_MESSAGE_MODE |
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TDI_SERVICE_CONNECTION_MODE |
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TDI_SERVICE_ERROR_FREE_DELIVERY |
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TDI_SERVICE_MULTICAST_SUPPORTED |
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TDI_SERVICE_NO_ZERO_LENGTH |
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TDI_SERVICE_FORCE_ACCESS_CHECK |
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TDI_SERVICE_ROUTE_DIRECTED;
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/*
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ISSUE: Do we need: TDI_SERVICE_INTERNAL_BUFFERING ?
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TDI_SERVICE_FORCE_ACCESS_CHECK ?
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TDI_SERVICE_CONNECTIONLESS_MODE ?
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TDI_SERVICE_DELAYED_ACCEPTANCE ?
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TDI_SERVICE_BROADCAST_SUPPORTED ?
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*/
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pProvider->MinimumLookaheadData = 1;
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//
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// The following data is for Streams
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//
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pProvider->MaxSendSize = SENDER_MAX_WINDOW_SIZE_PACKETS;
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if (pProvider->MaxDatagramSize > PGM_MAX_FEC_DATA_HEADER_LENGTH)
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{
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pProvider->MaxDatagramSize -= PGM_MAX_FEC_DATA_HEADER_LENGTH;
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}
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else
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{
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pProvider->MaxDatagramSize = 0;
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}
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PgmLog (PGM_LOG_INFORM_ALL_FUNCS, DBG_QUERY, "QueryProviderCompletion",
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"SvcFlags=<%x> MaxSendSize=<%d>, MaxDgramSize=<%d>\n",
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pProvider->ServiceFlags, pProvider->MaxSendSize, pProvider->MaxDatagramSize);
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}
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else
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "QueryProviderCompletion",
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"Transport returned <%x>, pProvider=<%x>\n", pIrp->IoStatus.Status, pProvider);
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}
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//
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// Must return a non-error status otherwise the IO system will not copy
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// back into the users buffer.
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//
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return (STATUS_SUCCESS);
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}
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//----------------------------------------------------------------------------
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NTSTATUS
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PgmQueryInformation(
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IN tPGM_DEVICE *pPgmDevice,
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IN PIRP pIrp,
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IN PIO_STACK_LOCATION pIrpSp
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)
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/*++
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Routine Description:
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This routine performs the TdiQueryInformation request for the transport
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provider.
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Arguments:
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IN pPgmDevice -- Pgm's Device object context
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IN pIrp -- Client's request Irp
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IN pIrpSp -- current request's stack pointer
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Return Value:
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NTSTATUS - Final status of the set event operation
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--*/
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{
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NTSTATUS status = STATUS_NOT_IMPLEMENTED;
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ULONG Size, BytesCopied = 0;
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PTDI_REQUEST_KERNEL_QUERY_INFORMATION Query;
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tTDI_QUERY_ADDRESS_INFO TdiQueryInfo;
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tADDRESS_CONTEXT *pAddress = pIrpSp->FileObject->FsContext;
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tCOMMON_SESSION_CONTEXT *pSession = pIrpSp->FileObject->FsContext;
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Query = (PTDI_REQUEST_KERNEL_QUERY_INFORMATION) &pIrpSp->Parameters;
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switch (Query->QueryType)
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{
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case TDI_QUERY_PROVIDER_INFO:
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{
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PgmLog (PGM_LOG_INFORM_ALL_FUNCS, DBG_QUERY, "PgmQueryInformation",
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"[TDI_QUERY_PROVIDER_INFO]:\n");
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TdiBuildQueryInformation (pIrp,
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pPgmDevice->pControlDeviceObject,
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pPgmDevice->pControlFileObject,
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QueryProviderCompletion,
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NULL,
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TDI_QUERY_PROVIDER_INFO,
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pIrp->MdlAddress);
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status = IoCallDriver (pPgmDevice->pControlDeviceObject, pIrp);
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//
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// we must return the next drivers ret code back to the IO subsystem
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//
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status = STATUS_PENDING;
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break;
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}
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case TDI_QUERY_ADDRESS_INFO:
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{
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if (pIrp->MdlAddress)
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{
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if (PGM_VERIFY_HANDLE2 (pAddress, PGM_VERIFY_ADDRESS, PGM_VERIFY_ADDRESS_DOWN))
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{
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PgmZeroMemory (&TdiQueryInfo, sizeof (tTDI_QUERY_ADDRESS_INFO));
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TdiQueryInfo.ActivityCount = 1;
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TdiQueryInfo.IpAddress.TAAddressCount = 1;
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TdiQueryInfo.IpAddress.Address[0].AddressType = TDI_ADDRESS_TYPE_IP;
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TdiQueryInfo.IpAddress.Address[0].AddressLength = sizeof(TDI_ADDRESS_IP);
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((PTDI_ADDRESS_IP) &TdiQueryInfo.IpAddress.Address[0].Address)->in_addr =
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htonl (pAddress->ReceiverMCastAddr);
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((PTDI_ADDRESS_IP) &TdiQueryInfo.IpAddress.Address[0].Address)->sin_port =
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htons (pAddress->ReceiverMCastPort);
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//
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// Due to the structure being Unaligned, we cannot reference the address
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// and port fields directly!
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//
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Size = offsetof (tTDI_QUERY_ADDRESS_INFO, IpAddress.Address[0].Address)
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+ sizeof(TDI_ADDRESS_IP);
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status = TdiCopyBufferToMdl (&TdiQueryInfo, 0, Size, pIrp->MdlAddress, 0, &BytesCopied);
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pIrp->IoStatus.Information = BytesCopied;
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PgmLog (PGM_LOG_INFORM_ALL_FUNCS, DBG_QUERY, "PgmQueryInformation",
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"[ADDRESS_INFO]: pAddress=<%x>, Copied=<%d/%d>\n", pAddress, BytesCopied, Size);
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break;
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}
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else if (PGM_VERIFY_HANDLE2 (pSession, PGM_VERIFY_SESSION_SEND, PGM_VERIFY_SESSION_RECEIVE))
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{
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if ((pAddress = pSession->pAssociatedAddress) &&
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(PGM_VERIFY_HANDLE (pAddress, PGM_VERIFY_ADDRESS)))
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{
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TdiBuildQueryInformation (pIrp,
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pAddress->pDeviceObject,
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pAddress->pFileObject,
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QueryAddressCompletion,
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NULL,
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TDI_QUERY_ADDRESS_INFO,
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pIrp->MdlAddress);
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PgmLog (PGM_LOG_INFORM_ALL_FUNCS, DBG_QUERY, "PgmQueryInformation",
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"[ADDRESS_INFO]: pSession=<%x>, querying transport ...\n", pSession);
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status = IoCallDriver (pPgmDevice->pControlDeviceObject, pIrp);
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//
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// we must return the next drivers ret code back to the IO subsystem
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//
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status = STATUS_PENDING;
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}
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else
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "PgmQueryInformation",
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"[ADDRESS_INFO]: pSession=<%x>, Invalid pAddress=<%x>\n", pSession, pAddress);
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status = STATUS_INVALID_HANDLE;
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}
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break;
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}
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else // neither an address nor a connect context!
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "PgmQueryInformation",
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"[TDI_QUERY_ADDRESS_INFO]: Invalid Handle=<%x>\n", pIrpSp->FileObject->FsContext);
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status = STATUS_INVALID_HANDLE;
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}
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}
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else
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "PgmQueryInformation",
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"[TDI_QUERY_ADDRESS_INFO]: No Mdl, pIrp=<%x>\n", pIrp);
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status = STATUS_UNSUCCESSFUL;
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}
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break;
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}
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default:
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{
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PgmLog (PGM_LOG_ERROR, DBG_QUERY, "PgmQueryInformation",
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"Query=<%d> not Implemented!\n", Query->QueryType);
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break;
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}
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}
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return (status);
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}
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//----------------------------------------------------------------------------
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