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package config
import (
// Forwarder represents a client side listener to forward traffic to the edge
type Forwarder struct {
URL string `json:"url"`
Listener string `json:"listener"`
TokenClientID string `json:"service_token_id" yaml:"serviceTokenID"`
TokenSecret string `json:"secret_token_id" yaml:"serviceTokenSecret"`
Destination string `json:"destination"`
// Tunnel represents a tunnel that should be started
type Tunnel struct {
URL string `json:"url"`
Origin string `json:"origin"`
ProtocolType string `json:"type"`
// DNSResolver represents a client side DNS resolver
type DNSResolver struct {
Enabled bool `json:"enabled"`
Address string `json:"address,omitempty"`
Port uint16 `json:"port,omitempty"`
Upstreams []string `json:"upstreams,omitempty"`
Bootstraps []string `json:"bootstraps,omitempty"`
MaxUpstreamConnections int `json:"max_upstream_connections,omitempty"`
// Root is the base options to configure the service
type Root struct {
LogDirectory string `json:"log_directory" yaml:"logDirectory,omitempty"`
LogLevel string `json:"log_level" yaml:"logLevel,omitempty"`
Forwarders []Forwarder `json:"forwarders,omitempty" yaml:"forwarders,omitempty"`
Tunnels []Tunnel `json:"tunnels,omitempty" yaml:"tunnels,omitempty"`
Resolver DNSResolver `json:"resolver,omitempty" yaml:"resolver,omitempty"`
// Hash returns the computed values to see if the forwarder values change
func (f *Forwarder) Hash() string {
h := md5.New()
io.WriteString(h, f.URL)
io.WriteString(h, f.Listener)
io.WriteString(h, f.TokenClientID)
io.WriteString(h, f.TokenSecret)
io.WriteString(h, f.Destination)
return fmt.Sprintf("%x", h.Sum(nil))
// Hash returns the computed values to see if the forwarder values change
func (r *DNSResolver) Hash() string {
h := md5.New()
io.WriteString(h, r.Address)
io.WriteString(h, strings.Join(r.Bootstraps, ","))
io.WriteString(h, strings.Join(r.Upstreams, ","))
io.WriteString(h, fmt.Sprintf("%d", r.Port))
io.WriteString(h, fmt.Sprintf("%d", r.MaxUpstreamConnections))
io.WriteString(h, fmt.Sprintf("%v", r.Enabled))
return fmt.Sprintf("%x", h.Sum(nil))
// EnabledOrDefault returns the enabled property
func (r *DNSResolver) EnabledOrDefault() bool {
return r.Enabled
// AddressOrDefault returns the address or returns the default if empty
func (r *DNSResolver) AddressOrDefault() string {
if r.Address != "" {
return r.Address
return "localhost"
// PortOrDefault return the port or returns the default if 0
func (r *DNSResolver) PortOrDefault() uint16 {
if r.Port > 0 {
return r.Port
return 53
// UpstreamsOrDefault returns the upstreams or returns the default if empty
func (r *DNSResolver) UpstreamsOrDefault() []string {
if len(r.Upstreams) > 0 {
return r.Upstreams
return []string{"", ""}
// BootstrapsOrDefault returns the bootstraps or returns the default if empty
func (r *DNSResolver) BootstrapsOrDefault() []string {
if len(r.Bootstraps) > 0 {
return r.Bootstraps
return []string{"", "", "https://[2606:4700:4700::1111]/dns-query", "https://[2606:4700:4700::1001]/dns-query"}
// MaxUpstreamConnectionsOrDefault return the max upstream connections or returns the default if negative
func (r *DNSResolver) MaxUpstreamConnectionsOrDefault() int {
if r.MaxUpstreamConnections >= 0 {
return r.MaxUpstreamConnections
return tunneldns.MaxUpstreamConnsDefault