Struct libcoap_sys::coap_pdu_t

#[repr(C)]
pub struct coap_pdu_t {
    pub type_: u8,
    pub code: u8,
    pub max_hdr_size: u8,
    pub hdr_size: u8,
    pub token_length: u8,
    pub tid: u16,
    pub max_delta: u16,
    pub alloc_size: usize,
    pub used_size: usize,
    pub max_size: usize,
    pub token: *mut u8,
    pub data: *mut u8,
}

structure for CoAP PDUs token, if any, follows the fixed size header, then options until payload marker (0xff), then the payload if stored inline. Memory layout is: <---header--->|<---token---><---options--->0xff<---payload---> header is addressed with a negative offset to token, its maximum size is max_hdr_size. options starts at token + token_length payload starts at data, its length is used_size - (data - token)

Fields

type_: u8

< message type

code: u8

< request method (value 1--10) or response code (value 40-255)

max_hdr_size: u8

< space reserved for protocol-specific header

hdr_size: u8

< actaul size used for protocol-specific header

token_length: u8

< length of Token

tid: u16

< transaction id, if any, in regular host byte order

max_delta: u16

< highest option number

alloc_size: usize

< allocated storage for token, options and payload

used_size: usize

< used bytes of storage for token, options and payload

max_size: usize

< maximum size for token, options and payload, or zero for variable size pdu

token: *mut u8

< first byte of token, if any, or options

data: *mut u8

< first byte of payload, if any

Trait Implementations

impl Clone for coap_pdu_t

fn clone(&self) -> coap_pdu_t

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Copy for coap_pdu_t

impl Debug for coap_pdu_t

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

Formats the value using the given formatter.