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82 lines
2.8 KiB
82 lines
2.8 KiB
/*++ BUILD Version: 0009 // Increment this if a change has global effects
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Copyright (c) 1987-1993 Microsoft Corporation
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Module Name:
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vcsndrcv.h
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Abstract:
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This is the include file that defines all constants and types for VC
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(Virtual Circuit) related Send/Receive/INitialization etc.
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Revision History:
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Balan Sethu Raman (SethuR) 06-Mar-95 Created
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Notes:
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--*/
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#ifndef _VCSNDRCV_H_
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#define _VCSNDRCV_H_
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// The connection oriented transport to a server can utilize multiple VC's to
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// acheive better throughput to a server. It is for this reason that the
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// VC transport data structure is built around multiple VC's. Howvever this
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// feature is not utilized currently.
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//
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// Though the SMB protocol permits multiple number of VC's to be associated with
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// a particular connection to a share, the data transfer of data is done in the
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// raw mode. In this mode of operation the SMB protocol does not permit multiple
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// outstanding requests. In the SMB protocol a number of requests can be multiplexed
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// along a connection to the server There are certain kind of requests which can
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// be completed on the client, i.e., no acknowledgement is neither expected nor
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// received. In these cases the send call is completed synchronoulsy. On the
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// other hand there is a second class of sends which cannot be resumed locally
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// till the appropriate acknowledgement is recieved from the server. In such
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// cases a list of requests is built up with each VC. On receipt of the appropriate
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// acknowledgement these requests are resumed.
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//
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typedef enum _SMBCE_VC_STATE_ {
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SMBCE_VC_STATE_MULTIPLEXED,
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SMBCE_VC_STATE_RAW,
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SMBCE_VC_STATE_DISCONNECTED,
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} SMBCE_VC_STATE, *PSMBCE_VC_STATE;
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typedef struct _SMBCE_VC {
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SMBCE_OBJECT_HEADER; // the struct header
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RXCE_VC RxCeVc;
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NTSTATUS Status; // Status of the VC.
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} SMBCE_VC, *PSMBCE_VC;
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typedef struct SMBCE_SERVER_VC_TRANSPORT {
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SMBCE_SERVER_TRANSPORT; // Anonymous struct for common fields
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RXCE_CONNECTION RxCeConnection; // the connection handle
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LARGE_INTEGER Delay; // the estimated delay on the connection
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ULONG MaximumNumberOfVCs;
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SMBCE_VC Vcs[1]; // Vcs associated with the connection.
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} SMBCE_SERVER_VC_TRANSPORT, *PSMBCE_SERVER_VC_TRANSPORT;
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#define VctReferenceVc(pVc) \
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InterlockedIncrement(&(pVc)->SwizzleCount)
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#define VctReferenceVcLite(pVc) \
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ASSERT(SmbCeSpinLockAcquired()); \
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(pVc)->SwizzleCount++
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#define VctDereferenceVc(pVc) \
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InterlockedDecrement(&(pVc)->SwizzleCount)
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#define VctDereferenceVcLite(pVc) \
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ASSERT(SmbCeSpinLockAcquired()); \
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(pVc)->SwizzleCount--
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#endif // _VCSNDRCV_H_
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