Struct RawPacketBuf 

pub struct RawPacketBuf {
    pub free: unsafe fn(NonNull<RawPacketBuf>),
    pub pool: *const (),
    pub data: NonNull<u8>,
    pub capacity: usize,
    pub headroom: usize,
    pub len: usize,
    pub meta: PacketMeta,
}

The bookkeeping of one PacketBuf: where its storage is, its headroom and length, its metadata, and how to free it.

Only pool implementations deal with this type. They keep one for each buffer, fill it in, and pass it to PacketBuf::from_raw.

Fields

free: unsafe fn(NonNull<RawPacketBuf>)

Called with this RawPacketBuf when the buffer is dropped. It gives the buffer back to its pool.

pool: *const ()

For the pool’s own use, for example to find itself in free. The buffer never reads it.

data: NonNull<u8>

Start of the storage.

capacity: usize

Size of the storage at data, in bytes.

headroom: usize

Offset of the first valid byte within the storage.

len: usize

Number of valid bytes.

meta: PacketMeta

Per-packet metadata. Zero-sized unless a packetmeta-* feature is enabled.