}

type muxConnectError struct {
	Error string
}

func (muxConnectError) Op() Op {
	return OpMuxConnectError
}

type pongMsg struct {
	NotFound bool    `msg:"nf"`
	Err      *string `msg:"e,allownil"`
}

func (pongMsg) Op() Op {
	return OpPong

	CacheControl string            `json:"cacheControl,omitempty" msg:",omitempty"`
	Expires      string            `json:"expires,omitempty" msg:",omitempty"`
	Metadata     map[string]string `json:"metadata,omitempty" msg:",omitempty"`
	Range        string            `json:"range,omitempty" msg:",omitempty"`
	PartNumber   int               `json:"partNumber,omitempty" msg:",omitempty"`

	if ok, msg := assertCallbacks(createCallback, []string{"c3", "c1", "c2", "c4"}); !ok {
		t.Errorf("callbacks tests failed, got %v", msg)
	}

	// plugin 3
	createCallback.Before("*").Register("plugin_3_fn1", c5)
	if ok, msg := assertCallbacks(createCallback, []string{"c5", "c3", "c1", "c2", "c4"}); !ok {
		t.Errorf("callbacks tests failed, got %v", msg)
	}

	createCallback.After("*").Register("plugin_3_fn2", c6)

		return tls.Certificate{}, ErrTLSReadError(nil).Msg("Unable to read the public key: %s", err)
	}
	keyPEMBlock, err := os.ReadFile(keyFile)
	if err != nil {
		return tls.Certificate{}, ErrTLSReadError(nil).Msg("Unable to read the private key: %s", err)
	}
	key, rest := pem.Decode(keyPEMBlock)
	if len(rest) > 0 {
		return tls.Certificate{}, ErrTLSUnexpectedData(nil).Msg("The private key contains additional data")
	}
	if key == nil {

		return
	}
	crawled[url] = true

	wg.Add(1)
	go func() {
		urlq <- url
	}()
}

func addProblem(url, errmsg string) {
	msg := fmt.Sprintf("Error on %s: %s (from %s)", url, errmsg, linkSources[url])
	if *verbose {
		log.Print(msg)
	}
	problems = append(problems, msg)
}

func crawlLoop() {
	for url := range urlq {
		if err := doCrawl(url); err != nil {
			addProblem(url, err.Error())
		}
	}

	return x509.ParsePKCS1PrivateKey(priv)
}

func fatalErr(err error) {
	if err == nil {
		return
	}
	log.Fatalln(err)
}

func fatalIf(b bool, msg string, v ...interface{}) {
	if !b {
		return
	}
	log.Fatalf(msg, v...)

	typ, err := r.Types.FindMessageByURL(url)
	if err != nil {
		// Here we ignore the error since we want istioctl to ignore unknown types due to the Envoy version change
		msg := exprpb.Type{TypeKind: &exprpb.Type_Dyn{Dyn: &emptypb.Empty{}}}
		return msg.ProtoReflect().Type(), nil
	}
	return typ, nil
}

// Wrapper is a wrapper around the Envoy ConfigDump
// It has extra helper functions for handling any/struct/marshal protobuf pain

	for _, e := range includes {
		if len(e) == 0 {
			return nil, config.ErrInvalidCompressionIncludesValue(nil).Msg("extension/mime-type cannot be empty")
		}
		if e == "/" {
			return nil, config.ErrInvalidCompressionIncludesValue(nil).Msg("extension/mime-type cannot be '/'")
		}
	}
	return includes, nil
}

// LookupConfig - lookup compression config.

	RecvBufSize int              // SO_RECVBUF size for the socket connection, NOTE: this sets server and client connection
	Interface   string           // This is a VRF device passed via `--interface` flag
	Trace       func(msg string) // Trace when starting.
}

// newHTTPListener - creates new httpListener object which is interface compatible to net.Listener.
// httpListener is capable to
// * listen to multiple addresses

		localHost, err := isLocalHost(host.Name, host.Port.String(), host.Port.String())
		if err != nil {
			return err
		}
		if !localHost {
			return config.ErrInvalidAddressFlag(nil).Msg("host in server address should be this server")
		}
	}

	return nil