Added upd client server examples in go

go/udpclient.go

@@ -0,0 +1,23 @@
+package main
+import (
+    "fmt"
+    "net"
+    "bufio"
+)
+
+func main() {
+    p :=  make([]byte, 2048)
+    conn, err := net.Dial("udp", "127.0.0.1:1234")
+    if err != nil {
+        fmt.Printf("Some error %v", err)
+        return
+    }
+    fmt.Fprintf(conn, "Hi UDP Server, How are you doing?")
+    _, err = bufio.NewReader(conn).Read(p)
+    if err == nil {
+        fmt.Printf("%s\n", p)
+    } else {
+        fmt.Printf("Some error %v\n", err)
+    }
+    conn.Close()
+}

go/udpserver.go

@@ -0,0 +1,36 @@
+package main
+import (
+    "fmt" 
+    "net"  
+)
+
+
+func sendResponse(conn *net.UDPConn, addr *net.UDPAddr) {
+    _,err := conn.WriteToUDP([]byte("From server: Hello I got your mesage "), addr)
+    if err != nil {
+        fmt.Printf("Couldn't send response %v", err)
+    }
+}
+
+
+func main() {
+    p := make([]byte, 2048)
+    addr := net.UDPAddr{
+        Port: 1234,
+        IP: net.ParseIP("127.0.0.1"),
+    }
+    ser, err := net.ListenUDP("udp", &addr)
+    if err != nil {
+        fmt.Printf("Some error %v\n", err)
+        return
+    }
+    for {
+        _,remoteaddr,err := ser.ReadFromUDP(p)
+        fmt.Printf("Read a message from %v %s \n", remoteaddr, p)
+        if err !=  nil {
+            fmt.Printf("Some error  %v", err)
+            continue
+        }
+        go sendResponse(ser, remoteaddr)
+    }
+}