Struct CommandBlockWrapper 

#[repr(C, packed(1))]
pub struct CommandBlockWrapper {
    pub signature: u32,
    pub tag: u32,
    pub data_transfer_length: u32,
    pub flags: u8,
    pub lun: u8,
    pub cb_length: u8,
    pub cb: [u8; 16],
}

Command Block Wrapper (31 bytes)

Sent from host to device on the Bulk-Out endpoint to initiate a command.

Fields

signature: u32

Signature: must be CBW_SIGNATURE (0x43425355)

tag: u32

Tag: unique per-command identifier, echoed in CSW

data_transfer_length: u32

Data transfer length in bytes

flags: u8

Flags: bit 7 = direction (0 = OUT, 1 = IN)

lun: u8

Logical Unit Number (bits 3:0)

cb_length: u8

Length of the command block (1-16)

cb: [u8; 16]

SCSI Command Descriptor Block (16 bytes, zero-padded)

Implementations

impl CommandBlockWrapper

pub const SIZE: usize = 31usize

Size of a CBW in bytes

pub fn new( tag: u32, data_length: u32, direction: u8, lun: u8, command: &[u8], ) -> Self

Create a new CBW with default values

pub fn to_bytes(&self) -> [u8; 31]

Serialize the CBW to a 31-byte array (little-endian)

pub fn from_bytes(data: &[u8]) -> Result<Self, KernelError>

Deserialize a CBW from a 31-byte slice

Trait Implementations

impl Clone for CommandBlockWrapper

fn clone(&self) -> CommandBlockWrapper

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CommandBlockWrapper

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

Formats the value using the given formatter.

impl Copy for CommandBlockWrapper