Struct OpenvpnHeader 

pub struct OpenvpnHeader {
    pub opcode: OpenvpnOpcode,
    pub key_id: u8,
    pub session_id: u64,
    pub hmac_hash: [u8; 20],
    pub packet_id: u32,
    pub timestamp: u32,
}

Parsed OpenVPN packet header

Fields

opcode: OpenvpnOpcode

Opcode (5 bits)

key_id: u8

Key ID (3 bits) – identifies the TLS session / key

session_id: u64

Session ID (8 bytes)

hmac_hash: [u8; 20]

HMAC hash for tls-auth (20 bytes, SHA-1)

packet_id: u32

Packet ID for replay protection

timestamp: u32

Timestamp (seconds since epoch)

Implementations

impl OpenvpnHeader

pub const SIZE: usize = 37usize

Header size in bytes: 1 (opcode+key_id) + 8 (session) + 20 (hmac) + 4 (pid) + 4 (ts)

pub fn parse(data: &[u8]) -> Option<Self>

Parse a header from raw bytes

pub fn to_bytes(&self) -> Vec<u8>

Serialise the header to bytes

Trait Implementations

impl Clone for OpenvpnHeader

fn clone(&self) -> OpenvpnHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for OpenvpnHeader

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

Formats the value using the given formatter.

impl PartialEq for OpenvpnHeader

fn eq(&self, other: &OpenvpnHeader) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for OpenvpnHeader

impl StructuralPartialEq for OpenvpnHeader