forked from quic-go/quic-go
08160ab18f
It is not sufficient to check for connection-level window updates every time a packet is sent. When a connection-level window update needs to be sent, we need to make sure that it gets sent immediately (i.e. call scheduleSending() in the session).
42 lines
1.4 KiB
Go
42 lines
1.4 KiB
Go
package flowcontrol
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import "github.com/lucas-clemente/quic-go/internal/protocol"
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type flowController interface {
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// for sending
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SendWindowSize() protocol.ByteCount
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UpdateSendWindow(protocol.ByteCount)
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AddBytesSent(protocol.ByteCount)
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// for receiving
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AddBytesRead(protocol.ByteCount)
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GetWindowUpdate() protocol.ByteCount // returns 0 if no update is necessary
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MaybeQueueWindowUpdate() // queues a window update, if necessary
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}
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// A StreamFlowController is a flow controller for a QUIC stream.
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type StreamFlowController interface {
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flowController
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// for sending
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IsBlocked() (bool, protocol.ByteCount)
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// for receiving
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// UpdateHighestReceived should be called when a new highest offset is received
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// final has to be to true if this is the final offset of the stream, as contained in a STREAM frame with FIN bit, and the RST_STREAM frame
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UpdateHighestReceived(offset protocol.ByteCount, final bool) error
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}
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// The ConnectionFlowController is the flow controller for the connection.
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type ConnectionFlowController interface {
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flowController
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// for sending
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IsNewlyBlocked() (bool, protocol.ByteCount)
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}
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type connectionFlowControllerI interface {
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ConnectionFlowController
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// The following two methods are not supposed to be called from outside this packet, but are needed internally
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// for sending
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EnsureMinimumWindowSize(protocol.ByteCount)
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// for receiving
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IncrementHighestReceived(protocol.ByteCount) error
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}
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