Struct ExtHandshake 

pub struct ExtHandshake {
    pub m: BTreeMap<String, u8>,
    pub v: Option<String>,
    pub p: Option<u16>,
    pub reqq: Option<u32>,
    pub metadata_size: Option<u64>,
    pub upload_only: Option<u8>,
}

Extension handshake (BEP 10, ext_id=0).

Exchanged after the standard handshake to negotiate extension IDs.

Fields

m: BTreeMap<String, u8>

Map of extension name → assigned message ID.

v: Option<String>

Client name.

p: Option<u16>

TCP listen port for incoming connections.

reqq: Option<u32>

Number of outstanding request queue size.

metadata_size: Option<u64>

Total size of metadata (for ut_metadata).

upload_only: Option<u8>

BEP 21: upload-only flag (1 = seeder, 0 or absent = leecher).

Implementations

impl ExtHandshake

pub fn new() -> Self

Create a handshake advertising our supported extensions.

pub fn new_with_plugins(plugin_names: &[&str]) -> Self

Create a handshake advertising built-in + plugin extensions.

Built-in extensions are assigned IDs 1–4. Plugin names are assigned IDs starting at 10, in the order provided.

pub fn new_upload_only() -> Self

Create a handshake advertising upload-only (BEP 21 seeder) status.

pub fn is_upload_only(&self) -> bool

Returns true if the peer declared BEP 21 upload-only status.

pub fn to_bytes(&self) -> Result<Bytes>

Encode to bencode bytes.

Errors

Returns an error if serialization fails.

pub fn from_bytes(data: &[u8]) -> Result<Self>

Decode from bencode bytes.

Uses lenient parsing to accept unsorted dictionary keys, which many real-world clients send in their extension handshakes.

Errors

Returns an error if the data is not valid bencode.

pub fn ext_id(&self, name: &str) -> Option<u8>

Look up the message ID for an extension by name.

Trait Implementations

impl Clone for ExtHandshake

fn clone(&self) -> ExtHandshake

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtHandshake

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

Formats the value using the given formatter.

impl Default for ExtHandshake

fn default() -> ExtHandshake

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ExtHandshake

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ExtHandshake

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.