adding in simple implementations

main.go

@@ -0,0 +1,72 @@
+package main
+
+import (
+	"math/rand"
+	"net"
+	"time"
+
+	"github.com/sirupsen/logrus"
+)
+
+// port global variable
+const (
+	PORT = ":5000"
+)
+
+func udpServer() {
+	s, err := net.ResolveUDPAddr("udp4", PORT)
+	if err != nil {
+		logrus.Error("Error while resolving udp address", err)
+		return
+	}
+
+	connection, err := net.ListenUDP("udp4", s)
+	if err != nil {
+		logrus.Error("Error while listening to udp address", err)
+		return
+	}
+
+	defer connection.Close()
+	buffer := make([]byte, 1024)
+	rand.Seed(time.Now().Unix())
+
+	logrus.Infof("Starting listening for udp packets on port %s", PORT)
+
+	for {
+		n, addr, err := connection.ReadFromUDP(buffer)
+		if err != nil {
+			logrus.Error("Error while reading from udp address", err)
+			return
+		}
+
+		// go routine to process the request
+		go handleRequest(buffer[:n], connection, addr)
+	}
+}
+
+func handleRequest(data []byte, connection *net.UDPConn, addr *net.UDPAddr) {
+	logrus.Info("Processing request")
+
+  logrus.Info("===============")
+	logrus.Infof("raw byte array -> ", data)
+	logrus.Info("string -> ", string(data))
+  logrus.Infof("addr -> %s\n", addr.String())
+  logrus.Info("===============")
+
+	respondUdp(connection, addr)
+}
+
+func respondUdp(conn *net.UDPConn, addr *net.UDPAddr) {
+	message := "received message from you! " + addr.String()
+
+	data := []byte(message)
+	_, err := conn.WriteToUDP(data, addr)
+	if err != nil {
+		logrus.Error("Error while responding back to client", err)
+		return
+	}
+}
+
+func main() {
+	udpServer()
+}