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improve return values of (n)ackPacket in new SentPacketHandler

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This commit is contained in:
Marten Seemann
2016-08-16 19:43:40 +07:00
parent 7b8fe7d113
commit 4f3f1065cb
2 changed files with 46 additions and 42 deletions
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42
ackhandler/sent_packet_handler.go
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@@ -66,7 +66,7 @@ func NewSentPacketHandler() SentPacketHandler {
}
}
func (h *sentPacketHandler) ackPacket(packetElement *ackhandlerlegacy.PacketElement) *ackhandlerlegacy.Packet {
func (h *sentPacketHandler) ackPacket(packetElement *ackhandlerlegacy.PacketElement) {
packet := &packetElement.Value
h.bytesInFlight -= packet.Length
@@ -80,11 +80,11 @@ func (h *sentPacketHandler) ackPacket(packetElement *ackhandlerlegacy.PacketElem
}
h.packetHistory.Remove(packetElement)
return packet
}
func (h *sentPacketHandler) nackPacket(packetElement *ackhandlerlegacy.PacketElement) (*ackhandlerlegacy.Packet, error) {
// nackPacket NACKs a packet
// it returns true if a FastRetransmissions was triggered
func (h *sentPacketHandler) nackPacket(packetElement *ackhandlerlegacy.PacketElement) bool {
packet := &packetElement.Value
packet.MissingReports++
@@ -92,9 +92,9 @@ func (h *sentPacketHandler) nackPacket(packetElement *ackhandlerlegacy.PacketEle
if packet.MissingReports > protocol.RetransmissionThreshold {
utils.Debugf("\tQueueing packet 0x%x for retransmission (fast)", packet.PacketNumber)
h.queuePacketForRetransmission(packetElement)
return packet, nil
return true
}
return nil, nil
return false
}
// does NOT set packet.Retransmitted. This variable is not needed anymore
@@ -195,12 +195,9 @@ func (h *sentPacketHandler) ReceivedAck(ackFrame *frames.AckFrame, withPacketNum
// NACK packets below the LowestAcked
if packetNumber < ackFrame.LowestAcked {
p, err := h.nackPacket(el)
if err != nil {
return err
}
if p != nil {
lostPackets = append(lostPackets, congestion.PacketInfo{Number: p.PacketNumber, Length: p.Length})
retransmitted := h.nackPacket(el)
if retransmitted {
lostPackets = append(lostPackets, congestion.PacketInfo{Number: packetNumber, Length: packet.Length})
}
continue
}
@@ -231,24 +228,17 @@ func (h *sentPacketHandler) ReceivedAck(ackFrame *frames.AckFrame, withPacketNum
if packetNumber > ackRange.LastPacketNumber {
return fmt.Errorf("BUG: ackhandler would have acked wrong packet 0x%x, while evaluating range 0x%x -> 0x%x", packetNumber, ackRange.FirstPacketNumber, ackRange.LastPacketNumber)
}
p := h.ackPacket(el)
if p != nil {
ackedPackets = append(ackedPackets, congestion.PacketInfo{Number: p.PacketNumber, Length: p.Length})
}
h.ackPacket(el)
ackedPackets = append(ackedPackets, congestion.PacketInfo{Number: packetNumber, Length: packet.Length})
} else {
p, err := h.nackPacket(el)
if err != nil {
return err
}
if p != nil {
lostPackets = append(lostPackets, congestion.PacketInfo{Number: p.PacketNumber, Length: p.Length})
retransmitted := h.nackPacket(el)
if retransmitted {
lostPackets = append(lostPackets, congestion.PacketInfo{Number: packetNumber, Length: packet.Length})
}
}
} else {
p := h.ackPacket(el)
if p != nil {
ackedPackets = append(ackedPackets, congestion.PacketInfo{Number: p.PacketNumber, Length: p.Length})
}
h.ackPacket(el)
ackedPackets = append(ackedPackets, congestion.PacketInfo{Number: packetNumber, Length: packet.Length})
}
}