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IONetworkLib.h

Includes:

Overview

This header defines functions you use to open and close connections to IONetworkInterface objects and to read from and write to the buffers of network data objects.

Functions

IONetworkClose: Close the connection to an IONetworkInterface object.
IONetworkGetDataCapacity: Get the capacity (in bytes) of a network data object.
IONetworkGetDataHandle: Get the handle of a network data object with the given name.
IONetworkGetPacketFiltersMask: Get the packet filters for a given filter group.
IONetworkOpen: Open a connection to an IONetworkInterface object. An IONetworkUserClient object is created to manage the connection.
IONetworkReadData: Read the buffer of a network data object.
IONetworkResetData: Fill the buffer of a network data object with zeroes.
IONetworkSetPacketFiltersMask: Set the packet filters for a given filter group.
IONetworkWriteData: Write to the buffer of a network data object.

IONetworkClose

Close the connection to an IONetworkInterface object.

IOReturn IONetworkClose(
    io_connect_t con);

IONetworkGetDataCapacity

Get the capacity (in bytes) of a network data object.

IOReturn IONetworkGetDataCapacity(
    io_connect_t conObject, 
    IONDHandle dataHandle, 
    UInt32 *capacityP);

Parameters

conObject: The connection object.
dataHandle: The handle of a network data object.
capacityP: Upon success, the capacity is written to this address.

Return Value

kIOReturnSuccess on success, or an error code otherwise.

IONetworkGetDataHandle

Get the handle of a network data object with the given name.

IOReturn IONetworkGetDataHandle(
    io_connect_t conObject, 
    const char *dataName, 
    IONDHandle *dataHandleP);

Parameters

conObject: The connection object.
dataName: The name of the network data object.
dataHandleP: Upon success, the handle is written to this address.

Return Value

kIOReturnSuccess on success, or an error code otherwise.

IONetworkGetPacketFiltersMask

Get the packet filters for a given filter group.

IOReturn IONetworkGetPacketFiltersMask(
    io_connect_t connect, 
    const io_name_t filterGroup, 
    UInt32 *filtersMask, 
    IOOptionBits options );

Parameters

connect: The connection object returned from IONetworkOpen().
filterGroup: The name of the packet filter group.
filtersMask: Pointer to the return value containing a mask of packet filters.
options: kIONetworkSupportedPacketFilters may be set to fetch the filters that are supported by the hardware.

Return Value

An IOReturn error code.

Discussion

A network controller may support a number of packets filters that can accept or reject a type of packet seen on the network. A filter group identifies a set of related filters, such as all filters that will allow a packet to pass upstream based on the destination address encoded within the packet. This function allows an user-space program to get the filtering performed by a given filter group.

IONetworkOpen

Open a connection to an IONetworkInterface object. An IONetworkUserClient object is created to manage the connection.

IOReturn IONetworkOpen(
    io_object_t obj,
    io_connect_t *con);

IONetworkReadData

Read the buffer of a network data object.

IOReturn IONetworkReadData(
    io_connect_t conObj, 
    IONDHandle dataHandle, 
    UInt8 *destBuf, 
    UInt32 *inOutSizeP);

Parameters

conObj: The connection object.
dataHandle: The handle of a network data object.
destBuf: The buffer where the data read shall be written to.
inOutSizeP: Pointer to an integer that the caller must initialize to contain the size of the buffer. This function will overwrite it with the actual number of bytes written to the buffer.

Return Value

kIOReturnSuccess on success, or an error code otherwise.

IONetworkResetData

Fill the buffer of a network data object with zeroes.

IOReturn IONetworkResetData(
    io_connect_t conObject,
    IONDHandle dataHandle);

Parameters

conObject: The connection object.
dataHandle: The handle of a network data object.

Return Value

kIOReturnSuccess on success, or an error code otherwise.

IONetworkSetPacketFiltersMask

Set the packet filters for a given filter group.

IOReturn IONetworkSetPacketFiltersMask(
    io_connect_t connect, 
    const io_name_t filterGroup, 
    UInt32 filtersMask, 
    IOOptionBits options );

Parameters

connect: The connection object returned from IONetworkOpen().
filterGroup: The name of the packet filter group.
filtersMask: A mask of filters to set.
options: No options are currently defined.

Return Value

An IOReturn error code.

Discussion

A network controller may support a number of packets filters that can accept or reject a type of packet seen on the network. A filter group identifies a set of related filters, such as all filters that will allow a packet to pass upstream based on the destination address encoded within the packet. This function allows an user-space program to set the filtering performed by a given filter group.

IONetworkWriteData

Write to the buffer of a network data object.

IOReturn IONetworkWriteData(
    io_connect_t conObj, 
    IONDHandle dataHandle, 
    UInt8 *srcBuf, 
    UInt32 inSize);

Parameters

conObj: The connection object.
dataHandle: The handle of a network data object.
srcBuf: The data to write is taken from this buffer.
inSize: The size of the source buffer.

Return Value

kIOReturnSuccess on success, or an error code otherwise.

Enumerations

IONetworkPacketFilterOptions

enum { 
    kIONetworkSupportedPacketFilters = 0x0001 
};

Constants

kIONetworkSupportedPacketFilters
Indicate the filters that are supported by the hardware.

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Last Updated: 2008-03-11