gosip.Server: add network argument to the Listen method

gosip.go

@@ -7,11 +7,16 @@ var (
 	defaultServer *Server
 )
 
+// DefaultServer returns auto created default SIP server
+func DefaultServer() *Server {
+	return defaultServer
+}
+
 // Listen starts SIP stack
-func Listen(listenAddr string) error {
+func Listen(network string, listenAddr string) error {
 	if defaultServer == nil {
 		defaultServer = NewServer(ServerConfig{})
 	}
 
-	return defaultServer.Listen(listenAddr)
+	return defaultServer.Listen(network, listenAddr)
 }

server.go

@@ -17,10 +17,6 @@ const (
 	defaultHostAddr   = "127.0.0.1"
 )
 
-var (
-	protocols = []string{"udp", "tcp"}
-)
-
 // RequestHandler is a callback that will be called on the incoming request
 // of the certain method
 type RequestHandler func(req sip.Request)
@@ -75,16 +71,10 @@ func NewServer(config ServerConfig) *Server {
 }
 
 // ListenAndServe starts serving listeners on the provided address
-func (srv *Server) Listen(listenAddr string) error {
-	if listenAddr == "" {
-		listenAddr = defaultListenAddr
-	}
-
-	for _, protocol := range protocols {
-		if err := srv.tp.Listen(protocol, listenAddr); err != nil {
-			// return immediately
-			return err
-		}
+func (srv *Server) Listen(network string, listenAddr string) error {
+	if err := srv.tp.Listen(network, listenAddr); err != nil {
+		// return immediately
+		return err
 	}
 
 	return nil

server_test.go

@@ -45,7 +45,7 @@ var _ = Describe("Server", func() {
 		wg := new(sync.WaitGroup)
 		called := false
 
-		Expect(srv.Listen("127.0.0.1:5060")).To(Succeed())
+		Expect(srv.Listen("udp", "127.0.0.1:5060")).To(Succeed())
 
 		srv.OnRequest(sip.INVITE, func(req sip.Request) {
 			Expect(req.Method).To(Equal(sip.INVITE))