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interface.go
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package quic
import (
"context"
"io"
"net"
"time"
"github.com/boisjacques/qed/internal/handshake"
"github.com/boisjacques/qed/internal/protocol"
)
// The StreamID is the ID of a QUIC stream.
type StreamID = protocol.StreamID
// A VersionNumber is a QUIC version number.
type VersionNumber = protocol.VersionNumber
// A Cookie can be used to verify the ownership of the client address.
type Cookie struct {
RemoteAddr string
SentTime time.Time
}
// ConnectionState records basic details about the QUIC Connection.
type ConnectionState = handshake.ConnectionState
// An ErrorCode is an application-defined error code.
type ErrorCode = protocol.ApplicationErrorCode
// Stream is the interface implemented by QUIC streams
type Stream interface {
// StreamID returns the stream ID.
StreamID() StreamID
// Read reads data from the stream.
// Read can be made to time out and return a net.Error with Timeout() == true
// after a fixed time limit; see SetDeadline and SetReadDeadline.
// If the stream was canceled by the peer, the error implements the StreamError
// interface, and Canceled() == true.
io.Reader
// Write writes data to the stream.
// Write can be made to time out and return a net.Error with Timeout() == true
// after a fixed time limit; see SetDeadline and SetWriteDeadline.
// If the stream was canceled by the peer, the error implements the StreamError
// interface, and Canceled() == true.
io.Writer
// Close closes the write-direction of the stream.
// Future calls to Write are not permitted after calling Close.
// It must not be called concurrently with Write.
// It must not be called after calling CancelWrite.
io.Closer
// CancelWrite aborts sending on this stream.
// It must not be called after Close.
// Data already written, but not yet delivered to the peer is not guaranteed to be delivered reliably.
// Write will unblock immediately, and future calls to Write will fail.
CancelWrite(ErrorCode) error
// CancelRead aborts receiving on this stream.
// It will ask the peer to stop transmitting stream data.
// Read will unblock immediately, and future Read calls will fail.
CancelRead(ErrorCode) error
// The context is canceled as soon as the write-side of the stream is closed.
// This happens when Close() is called, or when the stream is reset (either locally or remotely).
// Warning: This API should not be considered stable and might change soon.
Context() context.Context
// SetReadDeadline sets the deadline for future Read calls and
// any currently-blocked Read call.
// A zero value for t means Read will not time out.
SetReadDeadline(t time.Time) error
// SetWriteDeadline sets the deadline for future Write calls
// and any currently-blocked Write call.
// Even if write times out, it may return n > 0, indicating that
// some of the data was successfully written.
// A zero value for t means Write will not time out.
SetWriteDeadline(t time.Time) error
// SetDeadline sets the read and write deadlines associated
// with the Connection. It is equivalent to calling both
// SetReadDeadline and SetWriteDeadline.
SetDeadline(t time.Time) error
}
// A ReceiveStream is a unidirectional Receive Stream.
type ReceiveStream interface {
// see Stream.StreamID
StreamID() StreamID
// see Stream.Read
io.Reader
// see Stream.CancelRead
CancelRead(ErrorCode) error
// see Stream.SetReadDealine
SetReadDeadline(t time.Time) error
}
// A SendStream is a unidirectional Send Stream.
type SendStream interface {
// see Stream.StreamID
StreamID() StreamID
// see Stream.Write
io.Writer
// see Stream.Close
io.Closer
// see Stream.CancelWrite
CancelWrite(ErrorCode) error
// see Stream.Context
Context() context.Context
// see Stream.SetWriteDeadline
SetWriteDeadline(t time.Time) error
}
// StreamError is returned by Read and Write when the peer cancels the stream.
type StreamError interface {
error
Canceled() bool
ErrorCode() ErrorCode
}
// A Session is a QUIC Connection between two peers.
type Session interface {
// AcceptStream returns the next stream opened by the peer, blocking until one is available.
AcceptStream() (Stream, error)
// AcceptUniStream returns the next unidirectional stream opened by the peer, blocking until one is available.
AcceptUniStream() (ReceiveStream, error)
// OpenStream opens a new bidirectional QUIC stream.
// It returns a special error when the peer's concurrent stream limit is reached.
// There is no signaling to the peer about new streams:
// The peer can only accept the stream after data has been sent on the stream.
// TODO(#1152): Enable testing for the special error
OpenStream() (Stream, error)
// OpenStreamSync opens a new bidirectional QUIC stream.
// It blocks until the peer's concurrent stream limit allows a new stream to be opened.
OpenStreamSync() (Stream, error)
// OpenUniStream opens a new outgoing unidirectional QUIC stream.
// It returns a special error when the peer's concurrent stream limit is reached.
// TODO(#1152): Enable testing for the special error
OpenUniStream() (SendStream, error)
// OpenUniStreamSync opens a new outgoing unidirectional QUIC stream.
// It blocks until the peer's concurrent stream limit allows a new stream to be opened.
OpenUniStreamSync() (SendStream, error)
// LocalAddr returns the local address.
LocalAddr() net.Addr
// RemoteAddr returns the address of the peer.
RemoteAddr() net.Addr
// Close the Connection.
io.Closer
// Close the Connection with an error.
// The error must not be nil.
CloseWithError(ErrorCode, error) error
// The context is cancelled when the session is closed.
// Warning: This API should not be considered stable and might change soon.
Context() context.Context
// ConnectionState returns basic details about the QUIC Connection.
// Warning: This API should not be considered stable and might change soon.
ConnectionState() ConnectionState
}
// Config contains all configuration data needed for a QUIC server or client.
type Config struct {
// The QUIC versions that can be negotiated.
// If not set, it uses all versions available.
// Warning: This API should not be considered stable and will change soon.
Versions []VersionNumber
// The length of the Connection ID in bytes.
// It can be 0, or any value between 4 and 18.
// If not set, the interpretation depends on where the Config is used:
// If used for dialing an address, a 0 byte Connection ID will be used.
// If used for a server, or dialing on a packet Conn, a 4 byte Connection ID will be used.
// When dialing on a packet Conn, the ConnectionIDLength value must be the same for every Dial call.
ConnectionIDLength int
// HandshakeTimeout is the maximum duration that the cryptographic handshake may take.
// If the timeout is exceeded, the Connection is closed.
// If this value is zero, the timeout is set to 10 seconds.
HandshakeTimeout time.Duration
// IdleTimeout is the maximum duration that may pass without any incoming network activity.
// This value only applies after the handshake has completed.
// If the timeout is exceeded, the Connection is closed.
// If this value is zero, the timeout is set to 30 seconds.
IdleTimeout time.Duration
// AcceptCookie determines if a Cookie is accepted.
// It is called with cookie = nil if the client didn't send an Cookie.
// If not set, it verifies that the address matches, and that the Cookie was issued within the last 24 hours.
// This option is only valid for the server.
AcceptCookie func(clientAddr net.Addr, cookie *Cookie) bool
// MaxReceiveStreamFlowControlWindow is the maximum stream-level flow control window for receiving data.
// If this value is zero, it will default to 1 MB for the server and 6 MB for the client.
MaxReceiveStreamFlowControlWindow uint64
// MaxReceiveConnectionFlowControlWindow is the Connection-level flow control window for receiving data.
// If this value is zero, it will default to 1.5 MB for the server and 15 MB for the client.
MaxReceiveConnectionFlowControlWindow uint64
// MaxIncomingStreams is the maximum number of concurrent bidirectional streams that a peer is allowed to open.
// If not set, it will default to 100.
// If set to a negative value, it doesn't allow any bidirectional streams.
MaxIncomingStreams int
// MaxIncomingUniStreams is the maximum number of concurrent unidirectional streams that a peer is allowed to open.
// If not set, it will default to 100.
// If set to a negative value, it doesn't allow any unidirectional streams.
MaxIncomingUniStreams int
// KeepAlive defines whether this peer will periodically send PING frames to keep the Connection alive.
KeepAlive bool
}
// A Listener for incoming QUIC connections
type Listener interface {
// Close the server, sending CONNECTION_CLOSE frames to each peer.
Close() error
// Addr returns the local network addr that the server is listening on.
Addr() net.Addr
// Accept returns new sessions. It should be called in a loop.
Accept() (Session, error)
}