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simply PTO probe packet sending logic (#4913)

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No functional change expected.
This commit is contained in:
Marten Seemann 2025-01-22 20:26:30 -08:00 • committed by GitHub
parent d41f9749d3
commit a4c9b04c58
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GPG key ID: B5690EEEBB952194
1 changed files with 16 additions and 22 deletions
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38
connection.go
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@ -1859,28 +1859,10 @@ func (s *connection) triggerSending(now time.Time) error {
case ackhandler.SendAck:
// We can at most send a single ACK only packet.
// There will only be a new ACK after receiving new packets.
// SendAck is only returned when we're congestion limited, so we don't need to set the pacinggs timer.
// SendAck is only returned when we're congestion limited, so we don't need to set the pacing timer.
return s.maybeSendAckOnlyPacket(now)
case ackhandler.SendPTOInitial:
if err := s.sendProbePacket(protocol.EncryptionInitial, now); err != nil {
return err
}
if s.sendQueue.WouldBlock() {
s.scheduleSending()
return nil
}
return s.triggerSending(now)
case ackhandler.SendPTOHandshake:
if err := s.sendProbePacket(protocol.EncryptionHandshake, now); err != nil {
return err
}
if s.sendQueue.WouldBlock() {
s.scheduleSending()
return nil
}
return s.triggerSending(now)
case ackhandler.SendPTOAppData:
if err := s.sendProbePacket(protocol.Encryption1RTT, now); err != nil {
case ackhandler.SendPTOInitial, ackhandler.SendPTOHandshake, ackhandler.SendPTOAppData:
if err := s.sendProbePacket(sendMode, now); err != nil {
return err
}
if s.sendQueue.WouldBlock() {
@ -2073,7 +2055,19 @@ func (s *connection) maybeSendAckOnlyPacket(now time.Time) error {
return nil
}
func (s *connection) sendProbePacket(encLevel protocol.EncryptionLevel, now time.Time) error {
func (s *connection) sendProbePacket(sendMode ackhandler.SendMode, now time.Time) error {
var encLevel protocol.EncryptionLevel
//nolint:exhaustive // We only need to handle the PTO send modes here.
switch sendMode {
case ackhandler.SendPTOInitial:
encLevel = protocol.EncryptionInitial
case ackhandler.SendPTOHandshake:
encLevel = protocol.EncryptionHandshake
case ackhandler.SendPTOAppData:
encLevel = protocol.Encryption1RTT
default:
return fmt.Errorf("connection BUG: unexpected send mode: %d", sendMode)
}
// Queue probe packets until we actually send out a packet,
// or until there are no more packets to queue.
var packet *coalescedPacket