Struct VersionsCell 

pub struct VersionsCell {
    pub versions: Vec<u32>,
}

Link protocol version negotiation cell.

VERSIONS cells are exchanged at the start of a connection to negotiate the link protocol version. Both sides send their supported versions, and the highest mutually supported version is selected.

Wire Format

Variable-size cell:

[ CircID (0) ][ 7 (VERSIONS) ][ Length ][ Version1 (2 bytes) ][ Version2 ]...

Protocol Notes

• VERSIONS cells always use circuit ID 0
• The first VERSIONS cell uses 2-byte circuit IDs for backward compatibility
• Versions are encoded as 2-byte big-endian integers

Example

use stem_rs::client::cell::VersionsCell;
use stem_rs::client::datatype::LinkProtocol;

let cell = VersionsCell::new(vec![3, 4, 5]);
let packed = cell.pack(&LinkProtocol::new(2));

Fields

versions: Vec<u32>

Supported link protocol versions.

Implementations

impl VersionsCell

pub fn new(versions: Vec<u32>) -> Self

Creates a new VERSIONS cell with the specified protocol versions.

Arguments

• versions - List of supported link protocol versions

pub fn pack(&self, link_protocol: &LinkProtocol) -> Vec<u8>

Packs this cell into bytes for transmission.

pub fn unpack(payload: &[u8]) -> Result<Self, Error>

Unpacks a VERSIONS cell from payload bytes.

Trait Implementations

impl Clone for VersionsCell

fn clone(&self) -> VersionsCell

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for VersionsCell

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

Formats the value using the given formatter.

impl PartialEq for VersionsCell

fn eq(&self, other: &VersionsCell) -> 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 StructuralPartialEq for VersionsCell