Struct NNHeader 

pub struct NNHeader {
    pub proto_ver: u8,
    pub client_type: u8,
    pub client_ver: u16,
    pub lang_id: u8,
    pub user_id: u32,
    pub is_push: bool,
    pub is_compressed: bool,
    pub serial_no: u32,
    pub cmd_id: u16,
    pub body_len: u32,
    pub reserved: [u8; 8],
    pub ex_head_len: u16,
}

内部协议帧头

Fields

proto_ver: u8

client_type: u8

client_ver: u16

lang_id: u8

user_id: u32

is_push: bool

C++ ProtocolHeader::flags_.push_.

is_compressed: bool

C++ ProtocolHeader::flags_.compress_.

serial_no: u32

cmd_id: u16

body_len: u32

真实 body 长度（不含 ex_head）—— 对齐 C++ GetBodyLen() 语义

reserved: [u8; 8]

reserved 8 字节，行情命令用 [0]=market_type [1]=ex_type 注意：C++ reserved 只有 8 字节，后 2 字节是 ex_head_len

ex_head_len: u16

扩展头长度（FtnnExtendHead protobuf 序列化后字节数）

Implementations

impl NNHeader

pub fn new(cmd_id: u16, serial_no: u32) -> Self

pub fn encode(&self, dst: &mut BytesMut)

编码到字节流。body_len 字段按真实 body 长度传入（不含 ex_head）， 实际上线时我们 不发送 ex_head（ex_head_len=0），所以 wire 上的 ex_head_body_len = body_len。

pub fn decode(src: &BytesMut) -> Result<Option<Self>, FutuError>

pub fn is_compressed(&self) -> bool

pub fn flags(&self) -> u8

Trait Implementations

impl Clone for NNHeader

fn clone(&self) -> NNHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for NNHeader

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

Formats the value using the given formatter.