Enum Connection

pub enum Connection {
    Client(ClientConnection),
    Server(ServerConnection),
}

Available on crate feature std only.

A QUIC client or server connection.

Variants

Client(ClientConnection)

A client connection

Server(ServerConnection)

A server connection

Implementations

impl Connection

pub fn quic_transport_parameters(&self) -> Option<&[u8]>

Return the TLS-encoded transport parameters for the session’s peer.

See ConnectionCommon::quic_transport_parameters() for more details.

pub fn zero_rtt_keys(&self) -> Option<DirectionalKeys>

Compute the keys for encrypting/decrypting 0-RTT packets, if available

pub fn read_hs(&mut self, plaintext: &[u8]) -> Result<(), Error>

Consume unencrypted TLS handshake data.

Handshake data obtained from separate encryption levels should be supplied in separate calls.

pub fn write_hs(&mut self, buf: &mut Vec<u8>) -> Option<KeyChange>

Emit unencrypted TLS handshake data.

When this returns Some(_), the new keys must be used for future handshake data.

pub fn alert(&self) -> Option<AlertDescription>

Emit the TLS description code of a fatal alert, if one has arisen.

Check after read_hs returns Err(_).

pub fn export_keying_material<T: AsMut<[u8]>>( &self, output: T, label: &[u8], context: Option<&[u8]>, ) -> Result<T, Error>

Derives key material from the agreed connection secrets.

This function fills in output with output.len() bytes of key material derived from the master session secret using label and context for diversification. Ownership of the buffer is taken by the function and returned via the Ok result to ensure no key material leaks if the function fails.

See RFC5705 for more details on what this does and is for.

For TLS1.3 connections, this function does not use the “early” exporter at any point.

This function fails if called prior to the handshake completing; check with CommonState::is_handshaking first.

Methods from Deref<Target = CommonState>

pub fn wants_write(&self) -> bool

Returns true if the caller should call Connection::write_tls as soon as possible.

pub fn is_handshaking(&self) -> bool

Returns true if the connection is currently performing the TLS handshake.

During this time plaintext written to the connection is buffered in memory. After Connection::process_new_packets() has been called, this might start to return false while the final handshake packets still need to be extracted from the connection’s buffers.

pub fn peer_certificates(&self) -> Option<&[CertificateDer<'static>]>

Retrieves the certificate chain or the raw public key used by the peer to authenticate.

The order of the certificate chain is as it appears in the TLS protocol: the first certificate relates to the peer, the second certifies the first, the third certifies the second, and so on.

When using raw public keys, the first and only element is the raw public key.

This is made available for both full and resumed handshakes.

For clients, this is the certificate chain or the raw public key of the server.

For servers, this is the certificate chain or the raw public key of the client, if client authentication was completed.

The return value is None until this value is available.

Note: the return type of the ‘certificate’, when using raw public keys is CertificateDer<'static> even though this should technically be a SubjectPublicKeyInfoDer<'static>. This choice simplifies the API and ensures backwards compatibility.

pub fn alpn_protocol(&self) -> Option<&[u8]>

Retrieves the protocol agreed with the peer via ALPN.

A return value of None after handshake completion means no protocol was agreed (because no protocols were offered or accepted by the peer).

pub fn negotiated_cipher_suite(&self) -> Option<SupportedCipherSuite>

Retrieves the ciphersuite agreed with the peer.

This returns None until the ciphersuite is agreed.

pub fn negotiated_key_exchange_group( &self, ) -> Option<&'static dyn SupportedKxGroup>

Retrieves the key exchange group agreed with the peer.

This function may return None depending on the state of the connection, the type of handshake, and the protocol version.

If CommonState::is_handshaking() is true this function will return None. Similarly, if the CommonState::handshake_kind() is HandshakeKind::Resumed and the CommonState::protocol_version() is TLS 1.2, then no key exchange will have occurred and this function will return None.

pub fn protocol_version(&self) -> Option<ProtocolVersion>

Retrieves the protocol version agreed with the peer.

This returns None until the version is agreed.

pub fn handshake_kind(&self) -> Option<HandshakeKind>

Which kind of handshake was performed.

This tells you whether the handshake was a resumption or not.

This will return None before it is known which sort of handshake occurred.

pub fn send_close_notify(&mut self)

Queues a close_notify warning alert to be sent in the next Connection::write_tls call. This informs the peer that the connection is being closed.

Does nothing if any close_notify or fatal alert was already sent.

pub fn wants_read(&self) -> bool

Returns true if the caller should call Connection::read_tls as soon as possible.

If there is pending plaintext data to read with Connection::reader, this returns false. If your application respects this mechanism, only one full TLS message will be buffered by rustls.

Trait Implementations

impl Debug for Connection

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

Formats the value using the given formatter.

impl Deref for Connection

type Target = CommonState

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for Connection

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

impl From<ClientConnection> for Connection

fn from(c: ClientConnection) -> Self

Converts to this type from the input type.

impl From<ServerConnection> for Connection

fn from(c: ServerConnection) -> Self

Converts to this type from the input type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1128 bytes

Size for each variant:

• Client: 1032 bytes
• Server: 1128 bytes