pub struct P2PStream<S> { /* private fields */ }
Expand description
A P2PStream wraps over any Stream
that yields bytes and makes it compatible with p2p
protocol messages.
This stream supports multiple shared capabilities, that were negotiated during the handshake.
§Message-ID based multiplexing
Each capability is given as much of the message-ID space as it needs. All such capabilities must statically specify how many message IDs they require. On connection and reception of the Hello message, both peers have equivalent information about what capabilities they share (including versions) and are able to form consensus over the composition of message ID space.
Message IDs are assumed to be compact from ID 0x10 onwards (0x00-0x0f is reserved for the “p2p” capability) and given to each shared (equal-version, equal-name) capability in alphabetic order. Capability names are case-sensitive. Capabilities which are not shared are ignored. If multiple versions are shared of the same (equal name) capability, the numerically highest wins, others are ignored.
See also https://github.com/ethereum/devp2p/blob/master/rlpx.md#message-id-based-multiplexing
This stream emits non-empty Bytes that start with the normalized message id, so that the first
byte of each message starts from 0. If this stream only supports a single capability, for
example eth
then the first byte of each message will match
EthMessageID.
Implementations§
Source§impl<S> P2PStream<S>
impl<S> P2PStream<S>
Sourcepub fn new(inner: S, shared_capabilities: SharedCapabilities) -> Self
pub fn new(inner: S, shared_capabilities: SharedCapabilities) -> Self
Sourcepub fn set_outgoing_message_buffer_capacity(&mut self, capacity: usize)
pub fn set_outgoing_message_buffer_capacity(&mut self, capacity: usize)
Returns the shared capabilities for this stream.
This includes all the shared capabilities that were negotiated during the handshake and their offsets based on the number of messages of each capability.
Sourcepub fn send_ping(&mut self)
pub fn send_ping(&mut self)
Queues in a snappy encoded P2PMessage::Ping
message.
Source§impl<S> P2PStream<S>
impl<S> P2PStream<S>
Sourcepub async fn disconnect(
&mut self,
reason: DisconnectReason,
) -> Result<(), P2PStreamError>
pub async fn disconnect( &mut self, reason: DisconnectReason, ) -> Result<(), P2PStreamError>
Disconnects the connection by sending a disconnect message.
This future resolves once the disconnect message has been sent and the stream has been closed.
Trait Implementations§
Source§impl<S> CanDisconnect<Bytes> for P2PStream<S>
impl<S> CanDisconnect<Bytes> for P2PStream<S>
Source§async fn disconnect(
&mut self,
reason: DisconnectReason,
) -> Result<(), P2PStreamError>
async fn disconnect( &mut self, reason: DisconnectReason, ) -> Result<(), P2PStreamError>
DisconnectReason
as disconnect
information if the stream implements a protocol that can carry the additional disconnect
metadata.Source§impl<S> DisconnectP2P for P2PStream<S>
impl<S> DisconnectP2P for P2PStream<S>
Source§fn start_disconnect(
&mut self,
reason: DisconnectReason,
) -> Result<(), P2PStreamError>
fn start_disconnect( &mut self, reason: DisconnectReason, ) -> Result<(), P2PStreamError>
Starts to gracefully disconnect the connection by sending a Disconnect message and stop reading new messages.
Once disconnect process has started, the [Stream
] will terminate immediately.
§Errors
Returns an error only if the message fails to compress.
Source§fn is_disconnecting(&self) -> bool
fn is_disconnecting(&self) -> bool
true
if the connection is about to disconnect.Source§impl<S> Sink<Bytes> for P2PStream<S>
impl<S> Sink<Bytes> for P2PStream<S>
Source§fn poll_flush(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Result<(), Self::Error>>
fn poll_flush( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
Returns Poll::Ready(Ok(()))
when no buffered items remain.
Source§type Error = P2PStreamError
type Error = P2PStreamError
Source§fn poll_ready(
self: Pin<&mut Self>,
cx: &mut Context<'_>,
) -> Poll<Result<(), Self::Error>>
fn poll_ready( self: Pin<&mut Self>, cx: &mut Context<'_>, ) -> Poll<Result<(), Self::Error>>
Sink
to receive a value. Read moreSource§impl<S> Stream for P2PStream<S>
impl<S> Stream for P2PStream<S>
Source§type Item = Result<BytesMut, P2PStreamError>
type Item = Result<BytesMut, P2PStreamError>
impl<'pin, S> Unpin for P2PStream<S>where
PinnedFieldsOf<__P2PStream<'pin, S>>: Unpin,
Auto Trait Implementations§
impl<S> Freeze for P2PStream<S>where
S: Freeze,
impl<S> !RefUnwindSafe for P2PStream<S>
impl<S> Send for P2PStream<S>where
S: Send,
impl<S> Sync for P2PStream<S>where
S: Sync,
impl<S> !UnwindSafe for P2PStream<S>
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