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don't cancel retransmissions for Initial packets

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This commit is contained in:
Marten Seemann
2019-03-23 14:46:56 +01:00
parent 43dcf1de0a
commit d5fa430ba3
1 changed files with 3 additions and 15 deletions
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18
session.go
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@@ -1077,21 +1077,9 @@ func (s *session) maybeSendAckOnlyPacket() error {
// maybeSendRetransmission sends retransmissions for at most one packet.
// It takes care that Initials aren't retransmitted, if a packet from the server was already received.
func (s *session) maybeSendRetransmission() (bool, error) {
var retransmitPacket *ackhandler.Packet
for {
retransmitPacket = s.sentPacketHandler.DequeuePacketForRetransmission()
if retransmitPacket == nil {
return false, nil
}
// Don't retransmit Initial packets if we already received a response.
// An Initial might have been retransmitted multiple times before we receive a response.
// As soon as we receive one response, we don't need to send any more Initials.
if s.perspective == protocol.PerspectiveClient && s.receivedFirstPacket && retransmitPacket.PacketType == protocol.PacketTypeInitial {
s.logger.Debugf("Skipping retransmission of packet %d. Already received a response to an Initial.", retransmitPacket.PacketNumber)
continue
}
break
retransmitPacket := s.sentPacketHandler.DequeuePacketForRetransmission()
if retransmitPacket == nil {
return false, nil
}
s.logger.Debugf("Dequeueing retransmission for packet 0x%x (%s)", retransmitPacket.PacketNumber, retransmitPacket.EncryptionLevel)