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send Version Negotiation packets in a separate Go routine

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This commit is contained in:
Marten Seemann 2018-11-27 09:02:16 +07:00
parent 6c4116e7f4
commit 5e01c49fdf
3 changed files with 49 additions and 38 deletions
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23
server.go
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@ -299,23 +299,17 @@ func (s *server) Addr() net.Addr {
}
func (s *server) handlePacket(p *receivedPacket) {
if err := s.handlePacketImpl(p); err != nil {
s.logger.Debugf("error handling packet from %s: %s", p.remoteAddr, err)
}
}
func (s *server) handlePacketImpl(p *receivedPacket) error {
hdr := p.hdr
// send a Version Negotiation Packet if the client is speaking a different protocol version
if !protocol.IsSupportedVersion(s.config.Versions, hdr.Version) {
return s.sendVersionNegotiationPacket(p)
go s.sendVersionNegotiationPacket(p)
return
}
if hdr.Type == protocol.PacketTypeInitial {
go s.handleInitial(p)
}
// TODO(#943): send Stateless Reset
return nil
}
func (s *server) handleInitial(p *receivedPacket) {
@ -450,14 +444,15 @@ func (s *server) sendRetry(remoteAddr net.Addr, hdr *wire.Header) error {
return nil
}
func (s *server) sendVersionNegotiationPacket(p *receivedPacket) error {
func (s *server) sendVersionNegotiationPacket(p *receivedPacket) {
hdr := p.hdr
s.logger.Debugf("Client offered version %s, sending VersionNegotiationPacket", hdr.Version)
s.logger.Debugf("Client offered version %s, sending Version Negotiation", hdr.Version)
data, err := wire.ComposeVersionNegotiation(hdr.SrcConnectionID, hdr.DestConnectionID, s.config.Versions)
if err != nil {
return err
s.logger.Debugf("Error composing Version Negotiation: %s", err)
return
}
if _, err := s.conn.WriteTo(data, p.remoteAddr); err != nil {
s.logger.Debugf("Error sending Version Negotiation: %s", err)
}
_, err = s.conn.WriteTo(data, p.remoteAddr)
return err
}