when connecting new listener, bind:already in use error occurs

[lhd2001]

Your environment.

• Version: v.2.0.10, v.2.2.6 Release or SHA

• Browser: golang:1.14-alpine3.12, golang:1.20.3-alpine3.17 include version

• Other Information - stacktraces, related issues, suggestions how to fix, links for us to have context
  listener.go line 70 : return Server(c, l.config)
  ------------------------------------------------>
  s, err := Server(c, l.config)
  if s == nil {
  c.Close()
  }

  return s, err
  }

What did you do?

After Accept, server (c, l.config) returns nil.
Later, listener close -> when connecting new listener

What did you expect?

new listener bind

What happened?

bind:already in use error occurs.
Because udp.Listen is stopped at l.connWG.wait

[hasheddan]

Hi @lhd2001! Are you trying to re-use the underlying UDP listener with a new DTLS listener?