Struct ManagementHeader

pub struct ManagementHeader {
    pub frame_control: FrameControl,
    pub duration: [u8; 2],
    pub address_1: MacAddress,
    pub address_2: MacAddress,
    pub address_3: MacAddress,
    pub sequence_control: SequenceControl,
}

Representation of a management frame header. This format is used by all management frames!

This struct implements the Addresses trait, which provides the src, dest and bssid functions.

Structure of a management header:

Bytes 0-1
These contain protocol meta information and flags. These have already been parsed! Take a look at the FrameControl struct for more information.

Bytes 2-3
Those are the duration bytes. These are always present! They are quite specific and not explained here.

Bytes 4-29
These contain all important address information.

byte 4-9: Address 1. Always present! byte 10-15: Address 2. byte 16-21: Address 3. byte 22-23: Sequence Control.

Sequence Control:
Contains the FragmentNumber and SequenceNumber that define the main frame and the number of fragments in the frame.

Fields

frame_control: FrameControl

duration: [u8; 2]

address_1: MacAddress

address_2: MacAddress

address_3: MacAddress

sequence_control: SequenceControl

Implementations

impl ManagementHeader

pub fn encode(&self) -> Vec<u8>

Trait Implementations

impl Addresses for ManagementHeader

Which address is used in which way, depends on a combination of

• two flags in the FrameControl header.
• the Type/Subtype constellation.

A rule of thumb is this:

Address 1:
The recipient station address. If to_ds is set, this is the AP address. If from_ds is set then this is the station address

Address 2:
The transmitter station address. If from_ds is set, this is the AP address. If to_ds is set then this is the station address.

Address 3:
If Address 1 contains the destination address then Address 3 will contain the source address. Similarly, if Address 2 contains the source address then Address 3 will contain the destination address.

Sequence Control:
Contains the FragmentNumber and SequenceNumber that define the main frame and the number of fragments in the frame.

fn src(&self) -> Option<&MacAddress>

Return the mac address of the sender

fn dest(&self) -> &MacAddress

Return the mac address of the receiver. A full ff:ff:.. usually indicates a undirected broadcast.

fn bssid(&self) -> Option<&MacAddress>

The BSSID for this request. In most cases, this is expected to be present. The only time it’s not, is in a wireless distributed system (WDS).

impl Clone for ManagementHeader

fn clone(&self) -> ManagementHeader

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ManagementHeader

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.