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FILE_PIPE_LOCAL_INFORMATION structure (ntifs.h)

  • Article

The FILE_PIPE_LOCAL_INFORMATION structure contains information about the local end of a named pipe.

Syntax

typedef struct _FILE_PIPE_LOCAL_INFORMATION {
  ULONG NamedPipeType;
  ULONG NamedPipeConfiguration;
  ULONG MaximumInstances;
  ULONG CurrentInstances;
  ULONG InboundQuota;
  ULONG ReadDataAvailable;
  ULONG OutboundQuota;
  ULONG WriteQuotaAvailable;
  ULONG NamedPipeState;
  ULONG NamedPipeEnd;
} FILE_PIPE_LOCAL_INFORMATION, *PFILE_PIPE_LOCAL_INFORMATION;

Members

NamedPipeType

One of the following named pipe types.

Value Meaning
FILE_PIPE_BYTE_STREAM_TYPE (0x00000000) Data is read from the pipe as a stream of bytes.
FILE_PIPE_MESSAGE_TYPE (0x00000001) Data is read from the pipe as a stream of messages.

NamedPipeConfiguration

One of the following named pipe configurations.

Value Meaning
FILE_PIPE_INBOUND (0x00000000) The flow of data in the pipe goes from client to server only.
FILE_PIPE_OUTBOUND (0x00000001) The flow of data in the pipe goes from server to client only.
FILE_PIPE_FULL_DUPLEX (0x00000002) The pipe is bidirectional; both server and client processes can read from and write to the pipe.

MaximumInstances

The maximum number of instances that can be created for this pipe. The first instance of the pipe must specify this value.

CurrentInstances

The number of current named pipe instances.

InboundQuota

The inbound quota, in bytes, for the named pipe.

ReadDataAvailable

The amount of data available, in bytes, to be read from the named pipe.

OutboundQuota

The outbound quota, in bytes, for the named pipe.

WriteQuotaAvailable

The write quota, in bytes, for the named pipe.

NamedPipeState

The connection status for the named pipe. This state has one of the following values.

Value Meaning
FILE_PIPE_DISCONNECTED_STATE (0x00000001) Named pipe is disconnected.
FILE_PIPE_LISTENING_STATE (0x00000002) Named pipe is waiting to establish a connection.
FILE_PIPE_CONNECTED_STATE (0x00000003) Named pipe is connected.
FILE_PIPE_CLOSING_STATE (0x00000004) Named pipe is in the process of being closed.

NamedPipeEnd

The type of the named pipe end, which specifies whether this is the client or the server side of a named pipe.

Value Meaning
FILE_PIPE_CLIENT_END (0x00000000) This is the client end of a named pipe.
FILE_PIPE_SERVER_END (0x00000001) This is the server end of a named pipe.

Remarks

For information about pipes, see Pipes.

Requirements

Requirement Value
Minimum supported client Windows 2000
Header ntifs.h (include FltKernel.h, Ntifs.h)