Struct esp_idf_svc::sys::pbuf

#[repr(C)]
pub struct pbuf {
    pub next: *mut pbuf,
    pub payload: *mut c_void,
    pub tot_len: u16,
    pub len: u16,
    pub type_internal: u8,
    pub flags: u8,
    pub ref_: u8,
    pub if_idx: u8,
}

Main packet buffer struct

Fields

next: *mut pbuf

next pbuf in singly linked pbuf chain

payload: *mut c_void

pointer to the actual data in the buffer

tot_len: u16

total length of this buffer and all next buffers in chain belonging to the same packet.

For non-queue packet chains this is the invariant: p->tot_len == p->len + (p->next? p->next->tot_len: 0)

len: u16

length of this buffer

type_internal: u8

a bit field indicating pbuf type and allocation sources (see PBUF_TYPE_FLAG_, PBUF_ALLOC_FLAG_ and PBUF_TYPE_ALLOC_SRC_MASK)

flags: u8

misc flags

ref_: u8

the reference count always equals the number of pointers that refer to this pbuf. This can be pointers from an application, the stack itself, or pbuf->next pointers from a chain.

if_idx: u8

For incoming packets, this contains the input netif’s index

Trait Implementations

impl Clone for pbuf

fn clone(&self) -> pbuf

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for pbuf

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

Formats the value using the given formatter.

impl Default for pbuf

fn default() -> pbuf

Returns the “default value” for a type.

impl Copy for pbuf