gistfile1.go

package main

import (
	"log"
	"net"
	"golang.org/x/net/ipv4"
)

func main() {

    log.Println("Main starting...")

	conn, err := net.ListenPacket("udp4", "0.0.0.0:1234")
	if err != nil {
		log.Panic("Cannot bind to listen to multicast")
	}
	defer conn.Close()
	packetConn := ipv4.NewPacketConn(conn)
	if err := packetConn.SetControlMessage(ipv4.FlagDst, true); err != nil {
		log.Fatal("Cannot set FlagDst on connection")
	}
	log.Println("Starting to listen to Multicast")

	buffer := make([]byte, 1500)

	for i:=1; i<2000000; i++ {
		_, _, _, err := packetConn.ReadFrom(buffer)
		if err != nil {
			log.Fatal("Cannot read from UDP socket, err=", err)
		}
	}

}