AIX BPF DRIVER DOWNLOAD

A listener that opened its interface nonpromiscuously can receive packets promiscuously, because more than one device can be listening on a given interface. Enables or disables the immediate mode, based on the truth value of the arg parameter. Otherwise, a read will be blocked until either the kernel buffer becomes full or a timeout occurs. Specifies an open file descriptor that refers to a BPF device created using the open call. Before installing a filter, applications must check that the current version is compatible with the running kernel.

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This pbf must be performed before any pack-packets can be read. The underlying interface is not found. The fd argument is a BPF device descriptor.

tcpdump: Re: AIX BPF driver load

Bbpf the requested buffer size cannot be accommodated, the closest allowable size is set and returned in the arg parameter. Parameters Item Description fd Specifies an open file descriptor that refers to a BPF device created using the open call. Specifies an open file descriptor that refers to a BPF device created using the open call.

All other fields are undefined. Returns the a structure of packet statistics. All packets, not just those destined for the local host, are processed. The cmd parameter and an optional third parameter with varying types are passed to and interpreted by the BPF ioctl function to perform an appropriate control operation that is specified by the user.

ioctl BPF Control Operations

Insufficient memory was available to process the request. Sets the hardware interface associate with the device.

Returns the major and minor version numbers of the filter language currently recognized by the kernel. Returns the name of the hardware interface that the device is listening on. The arg parameter is a pointer to the indicated type.

Represents additional information that is needed to perform the requested function. Sets the filter program used by the kernel to discard uninteresting packets. The BPF device already exists. The underlying interface or network is down. The specified address is not available for interface. A signal was caught during an ioctl operation.

Returns the type of the data link layer underlying the attached interface. Enables or disables the immediate mode, based on the truth value of the arg parameter. The available memory is not enough. The type of the arg parameter is either an integer or a pointer to a BPF-specific data structure, depending on the particular control request.

The BPF device could not be set up. Error Codes The ioctl commands fail under the following general conditions: A command or argument, which is not valid, was specified. Such a process does not exist.

The arg parameter specifies the length of time to aiz before a read request times out. The problem can be remedied with an appropriate filter. Return Values Upon successful completion, ioctl returns a value of 0. Returns the buffer length for reads on BPF devices. Forces the interface into promiscuous mode. Upon successful completion, ioctl returns a value of 0. Otherwise, a read will be blocked until either the kernel buffer becomes full or a timeout occurs.