forked from quic-go/quic-go
/
stop_waiting_manager.go
43 lines (36 loc) · 1.19 KB
/
stop_waiting_manager.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
package ackhandler
import (
"github.com/lucas-clemente/quic-go/internal/protocol"
"github.com/lucas-clemente/quic-go/internal/wire"
)
// This stopWaitingManager is not supposed to satisfy the StopWaitingManager interface, which is a remnant of the legacy AckHandler, and should be remove once we drop support for QUIC 33
type stopWaitingManager struct {
largestLeastUnackedSent protocol.PacketNumber
nextLeastUnacked protocol.PacketNumber
lastStopWaitingFrame *wire.StopWaitingFrame
}
func (s *stopWaitingManager) GetStopWaitingFrame(force bool) *wire.StopWaitingFrame {
if s.nextLeastUnacked <= s.largestLeastUnackedSent {
if force {
return s.lastStopWaitingFrame
}
return nil
}
s.largestLeastUnackedSent = s.nextLeastUnacked
swf := &wire.StopWaitingFrame{
LeastUnacked: s.nextLeastUnacked,
}
s.lastStopWaitingFrame = swf
return swf
}
func (s *stopWaitingManager) ReceivedAck(ack *wire.AckFrame) {
largestAcked := ack.LargestAcked()
if largestAcked >= s.nextLeastUnacked {
s.nextLeastUnacked = largestAcked + 1
}
}
func (s *stopWaitingManager) QueuedRetransmissionForPacketNumber(p protocol.PacketNumber) {
if p >= s.nextLeastUnacked {
s.nextLeastUnacked = p + 1
}
}