Struct Dot11CCMP 

pub struct Dot11CCMP {
    pub offset: usize,
}

CCMP (Counter Mode CBC-MAC Protocol / AES-CCM) encryption wrapper.

Format:

[PN0(1)] [PN1(1)] [Rsvd(1)] [KeyID/ExtIV(1)] [PN2(1)] [PN3(1)] [PN4(1)] [PN5(1)]
[Encrypted Data ...]
[MIC (8 bytes)]

The KeyID/ExtIV byte:

• Bits 0-4: Reserved
• Bit 5: ExtIV flag (always 1 for CCMP)
• Bits 6-7: Key ID

PN (Packet Number) is a 48-bit value constructed from PN0..PN5.

Fields

offset: usize

Implementations

impl Dot11CCMP

pub fn new(offset: usize) -> Self

pub fn validate(buf: &[u8], offset: usize) -> Result<(), FieldError>

Validate buffer length for CCMP header.

pub fn pn0(&self, buf: &[u8]) -> Result<u8, FieldError>

PN0 (byte 0 of CCMP header).

pub fn pn1(&self, buf: &[u8]) -> Result<u8, FieldError>

PN1 (byte 1 of CCMP header).

pub fn reserved(&self, buf: &[u8]) -> Result<u8, FieldError>

Reserved byte (byte 2, should be 0).

pub fn key_id(&self, buf: &[u8]) -> Result<u8, FieldError>

Key ID (bits 6-7 of byte 3).

pub fn ext_iv(&self, buf: &[u8]) -> Result<bool, FieldError>

ExtIV flag (bit 5 of byte 3, always 1 for CCMP).

pub fn pn_high(&self, buf: &[u8]) -> Result<[u8; 4], FieldError>

PN2-PN5 (bytes 4-7).

pub fn pn(&self, buf: &[u8]) -> Result<u64, FieldError>

Full 48-bit Packet Number (PN). PN = PN0 | (PN1 << 8) | (PN2 << 16) | (PN3 << 24) | (PN4 << 32) | (PN5 << 40)

pub fn mic(&self, buf: &[u8], frame_end: usize) -> Result<[u8; 8], FieldError>

MIC (Message Integrity Code) — 8 bytes at the end of the encrypted data.

pub fn header_len(&self) -> usize

Header length (always 8 bytes for CCMP).

pub fn trailer_len(&self) -> usize

Trailer length (MIC = 8 bytes).

pub fn build_header(pn: u64, key_id: u8) -> Vec<u8>

Build a CCMP header.

pub fn build_mic(mic: [u8; 8]) -> Vec<u8>

Build a CCMP MIC trailer (placeholder — actual MIC requires key material).

Trait Implementations

impl Clone for Dot11CCMP

fn clone(&self) -> Dot11CCMP

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Dot11CCMP

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

Formats the value using the given formatter.