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net/memnet: add optional Listener.NewConn config knob

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Updates tailscale/corp#11620

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2023-06-12 20:43:14 +00:00 committed by Brad Fitzpatrick
parent 4451a7c364
commit a076213f58
1 changed files with 12 additions and 1 deletions
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13
net/memnet/listener.go
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@ -22,6 +22,10 @@ type Listener struct {
ch chan Conn
closeOnce sync.Once
closed chan struct{}
// NewConn, if non-nil, is called to create a new pair of connections
// when dialing. If nil, NewConn is used.
NewConn func(network, addr string, maxBuf int) (Conn, Conn)
}
// Listen returns a new Listener for the provided address.
@ -70,7 +74,14 @@ func (l *Listener) Dial(ctx context.Context, network, addr string) (_ net.Conn,
Addr: addr,
}
}
c, s := NewConn(addr, bufferSize)
newConn := l.NewConn
if newConn == nil {
newConn = func(network, addr string, maxBuf int) (Conn, Conn) {
return NewConn(addr, maxBuf)
}
}
c, s := newConn(network, addr, bufferSize)
defer func() {
if err != nil {
c.Close()