func main() {
var normal tec.TempErrCatcher
var skipper tec.TempErrCatcher
skipper.IsTemp = func(e error) bool {
return e == ErrSkip
}
fmt.Println("trying normal (uses Temporary interface)")
tryTec(normal)
fmt.Println("")
fmt.Println("trying skipper (uses our IsTemp function)")
tryTec(skipper)
}
// Accept waits for and returns the next connection to the listener.
// Note that unfortunately this
func (l *listener) Accept() (net.Conn, error) {
// listeners dont have contexts. given changes dont make sense here anymore
// note that the parent of listener will Close, which will interrupt all io.
// Contexts and io don't mix.
ctx := context.Background()
var catcher tec.TempErrCatcher
catcher.IsTemp = func(e error) bool {
// ignore connection breakages up to this point. but log them
if e == io.EOF {
log.Debugf("listener ignoring conn with EOF: %s", e)
return true
}
te, ok := e.(tec.Temporary)
if ok {
log.Debugf("listener ignoring conn with temporary err: %s", e)
return te.Temporary()
}
return false
}
for {
maconn, err := l.Listener.Accept()
if err != nil {
if catcher.IsTemporary(err) {
continue
}
return nil, err
}
log.Debugf("listener %s got connection: %s <---> %s", l, maconn.LocalMultiaddr(), maconn.RemoteMultiaddr())
if l.filters != nil && l.filters.AddrBlocked(maconn.RemoteMultiaddr()) {
log.Debugf("blocked connection from %s", maconn.RemoteMultiaddr())
maconn.Close()
continue
}
// If we have a wrapper func, wrap this conn
if l.wrapper != nil {
maconn = l.wrapper(maconn)
}
c, err := newSingleConn(ctx, l.local, "", maconn)
if err != nil {
if catcher.IsTemporary(err) {
continue
}
return nil, err
}
if l.privk == nil || EncryptConnections == false {
log.Warning("listener %s listening INSECURELY!", l)
return c, nil
}
sc, err := newSecureConn(ctx, l.privk, c)
if err != nil {
log.Infof("ignoring conn we failed to secure: %s %s", err, c)
continue
}
return sc, nil
}
}