104 lines
2.3 KiB
C
104 lines
2.3 KiB
C
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/*++
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Copyright (c) 1998, Microsoft Corporation
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Module Name:
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bufferc.h
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Abstract:
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This module contains declarations for buffer-management.
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All network I/O in this component occurs via completion packets.
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The buffer routines below are used to acquire and release the buffers
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used for sending and receiving data.
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In addition to holding the data transferred, the buffers contain fields
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to facilitate their use with completion ports. See below for details
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on the use of the fields.
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Author:
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Abolade Gbadegesin (aboladeg) 2-Mar-1998
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Savas Guven (savasg) 20-Oct-2000
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Revision History:
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--*/
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#if 0
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#ifndef _NATHLP_BUFFER_H_
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#define _NATHLP_BUFFER_H_
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#define NH_BUFFER_SIZE 576
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#define NH_MAX_BUFFER_QUEUE_LENGTH 32
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//
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// Structure: NH_BUFFER
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//
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// This structure holds a buffer used for network I/O on a socket.
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//
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typedef enum _NH_BUFFER_TYPE {
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NhFixedLengthBufferType,
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NhVariableLengthBufferType
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} NH_BUFFER_TYPE;
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class NH_BUFFER : public GENERIC_NODE
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{
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class _CNhSock * Socketp;
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//
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// Completion routine and contexts for the buffer's most recent I/O request
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//
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PNH_COMPLETION_ROUTINE CompletionRoutine;
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PVOID Context;
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PVOID Context2;
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//
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// Passed as the system context area for any I/O using the buffer
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//
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OVERLAPPED Overlapped;
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//
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// Upon completion of a receive, the receive-flags and source-address
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// length for the message read
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//
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ULONG ReceiveFlags;
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ULONG AddressLength;
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union {
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//
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// Holds the source address when a datagram-read completes
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//
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SOCKADDR_IN ReadAddress;
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//
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// Holds the destination address while a datagram-send is in progress
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//
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SOCKADDR_IN WriteAddress;
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//
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// Holds the remote address while a connect is in progress
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//
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SOCKADDR_IN ConnectAddress;
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//
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// Holds the state of a multi-request read or write
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//
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struct {
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ULONG UserFlags;
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ULONG BytesToTransfer;
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ULONG TransferOffset;
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};
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};
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//
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// Upon completion of an I/O request, the error-code, byte-count,
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// and data-bytes for the request
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//
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ULONG ErrorCode;
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ULONG BytesTransferred;
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UCHAR Buffer[NH_BUFFER_SIZE];
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}
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#endif
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