NET1847:Add STUN settings (#3235)

* add setting to turn on/off STUN

* sync stun setting in peerUpdate

* sync stun servers setting in peerUpdate

compose/docker-compose.yml

@@ -12,7 +12,7 @@ services:
       - sqldata:/root/data
     environment:
       # config-dependant vars
-      - STUN_LIST=stun1.netmaker.io:3478,stun2.netmaker.io:3478,stun1.l.google.com:19302,stun2.l.google.com:19302
+      - STUN_SERVERS=stun1.netmaker.io:3478,stun2.netmaker.io:3478,stun1.l.google.com:19302,stun2.l.google.com:19302
       # The domain/host IP indicating the mq broker address
       - BROKER_ENDPOINT=wss://broker.${NM_DOMAIN} # For EMQX broker use `BROKER_ENDPOINT=wss://broker.${NM_DOMAIN}/mqtt`
       # For EMQX broker (uncomment the two lines below)

config/config.go

@@ -101,6 +101,8 @@ type ServerConfig struct {
 	SmtpPort                   int           `json:"smtp_port"`
 	MetricInterval             string        `yaml:"metric_interval"`
 	ManageDNS                  bool          `yaml:"manage_dns"`
+	Stun                       bool          `yaml:"stun"`
+	StunServers                string        `yaml:"stun_servers"`
 	DefaultDomain              string        `yaml:"default_domain"`
 }
 

logic/peers.go

@@ -426,6 +426,8 @@ func GetPeerUpdateForHost(network string, host *models.Host, allNodes []models.N
 	}
 
 	hostPeerUpdate.ManageDNS = servercfg.GetManageDNS()
+	hostPeerUpdate.Stun = servercfg.IsStunEnabled()
+	hostPeerUpdate.StunServers = servercfg.GetStunServers()
 	return hostPeerUpdate, nil
 }
 

models/mqtt.go

@@ -25,6 +25,8 @@ type HostPeerUpdate struct {
 	ReplacePeers      bool                  `json:"replace_peers"`
 	EndpointDetection bool                  `json:"endpoint_detection"`
 	ManageDNS         bool                  `yaml:"manage_dns"`
+	Stun              bool                  `yaml:"stun"`
+	StunServers       string                `yaml:"stun_servers"`
 }
 
 type FwRule struct {

models/structs.go

@@ -267,6 +267,8 @@ type ServerConfig struct {
 	TrafficKey     []byte `yaml:"traffickey"`
 	MetricInterval string `yaml:"metric_interval"`
 	ManageDNS      bool   `yaml:"manage_dns"`
+	Stun           bool   `yaml:"stun"`
+	StunServers    string `yaml:"stun_servers"`
 	DefaultDomain  string `yaml:"default_domain"`
 }
 

scripts/netmaker.default.env

@@ -94,3 +94,5 @@ PEER_UPDATE_BATCH_SIZE=50
 DEFAULT_DOMAIN=netmaker.hosted
 # managed dns setting, set to true to resolve dns entries on netmaker network
 MANAGE_DNS=false
+# if STUN is set to true, hole punch is called
+STUN=true

servercfg/serverconf.go

@@ -94,6 +94,8 @@ func GetServerConfig() config.ServerConfig {
 	cfg.RacAutoDisable = GetRacAutoDisable()
 	cfg.MetricInterval = GetMetricInterval()
 	cfg.ManageDNS = GetManageDNS()
+	cfg.Stun = IsStunEnabled()
+	cfg.StunServers = GetStunServers()
 	cfg.DefaultDomain = GetDefaultDomain()
 	return cfg
 }
@@ -140,6 +142,8 @@ func GetServerInfo() models.ServerConfig {
 	cfg.IsPro = IsPro
 	cfg.MetricInterval = GetMetricInterval()
 	cfg.ManageDNS = GetManageDNS()
+	cfg.Stun = IsStunEnabled()
+	cfg.StunServers = GetStunServers()
 	cfg.DefaultDomain = GetDefaultDomain()
 	return cfg
 }
@@ -805,6 +809,19 @@ func IsEndpointDetectionEnabled() bool {
 	return enabled
 }
 
+// IsStunEnabled - returns true if STUN set to on
+func IsStunEnabled() bool {
+	var enabled = true
+	if os.Getenv("STUN") != "" {
+		enabled = os.Getenv("STUN") == "true"
+	}
+	return enabled
+}
+
+func GetStunServers() string {
+	return os.Getenv("STUN_SERVERS")
+}
+
 // GetEnvironment returns the environment the server is running in (e.g. dev, staging, prod...)
 func GetEnvironment() string {
 	if env := os.Getenv("ENVIRONMENT"); env != "" {