Add second listener for whitelist/knocking

knockr.go

@@ -9,40 +9,52 @@ import (
 var whitelist []string
 
 func main() {
-	ln, err := net.Listen("tcp", ":8080")
+	go listener(9090, whitelist_handler)
+	listener(8080, gateway_handler)
+}
+
+func listener(port int, listen_func func(c net.Conn)) {
+	ln, err := net.Listen("tcp", fmt.Sprintf(":%d", port))
 
 	if err != nil {
 		fmt.Println("Errur on Listening")
 	} else {
+		fmt.Println("Opened :", port)
 		for {
 			conn, err := ln.Accept()
 			if err != nil {
 				fmt.Println("Errur on Accepting")
 			} else {
-				go handle(conn)
+				go listen_func(conn)
 			}
 		}
 	}
 }
 
-func handle(c net.Conn) {
+func whitelist_handler(c net.Conn) {
 	host, _, _ := net.SplitHostPort(c.RemoteAddr().String())
 
 	io.WriteString(c, "Knock Knock, ")
 	io.WriteString(c, host)
 	io.WriteString(c, ". ")
 
-	if is_whitelisted(host) {
-		io.WriteString(c, "You're whitelisted.")
-	} else {
-		io.WriteString(c, "You're not whitelisted.")
-	}
-
 	add_to_whitelist(host)
 
 	c.Close()
 }
 
+func gateway_handler(c net.Conn) {
+	host, _, _ := net.SplitHostPort(c.RemoteAddr().String())
+
+	if is_whitelisted(host) {
+		fmt.Println("OK: ", host)
+		io.WriteString(c, "Hola o/")
+	} else {
+		fmt.Println("BLOCK: ", host)
+	}
+	c.Close()
+}
+
 func add_to_whitelist(addr string) {
 	if ! is_whitelisted(addr) {
 		whitelist = append(whitelist, addr)