Refactor to not include a server by default

tcp.go

@@ -0,0 +1,38 @@
+package dynamiclistener
+
+import (
+	"fmt"
+	"net"
+	"reflect"
+	"time"
+)
+
+func NewTCPListener(ip string, port int) (net.Listener, error) {
+	l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", ip, port))
+	if err != nil {
+		return nil, err
+	}
+
+	tcpListener, ok := l.(*net.TCPListener)
+	if !ok {
+		return nil, fmt.Errorf("wrong listener type: %v", reflect.TypeOf(tcpListener))
+	}
+
+	return tcpKeepAliveListener{
+		TCPListener: tcpListener,
+	}, nil
+}
+
+type tcpKeepAliveListener struct {
+	*net.TCPListener
+}
+
+func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
+	tc, err := ln.AcceptTCP()
+	if err != nil {
+		return
+	}
+	tc.SetKeepAlive(true)
+	tc.SetKeepAlivePeriod(3 * time.Minute)
+	return tc, nil
+}