TCP echo server

.gitignore

@@ -46,3 +46,4 @@ statecsv2json/statecsv2json
 converter-main/converter-main
 tcpclient/tcpclient
 tcpserver/tcpserver
+echoserver/echoserver

echoserver/main.go

@@ -0,0 +1,23 @@
+package main
+
+import (
+	"io"
+	"net"
+)
+
+func main() {
+	ln, err := net.Listen("tcp", ":9000")
+	if err != nil {
+		panic(err)
+	}
+	defer ln.Close()
+
+	for {
+		conn, err := ln.Accept()
+		if err != nil {
+			panic(err)
+		}
+		io.Copy(conn, conn)
+		conn.Close()
+	}
+}