init

examples/forward/udp/srv.go

@@ -0,0 +1,44 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"net"
+)
+
+var (
+	laddr string
+)
+
+func init() {
+	log.SetFlags(log.LstdFlags | log.Lshortfile)
+
+	flag.StringVar(&laddr, "L", ":8080", "listen address")
+	flag.Parse()
+}
+func main() {
+	udpEchoServer()
+}
+
+func udpEchoServer() {
+	addr, err := net.ResolveUDPAddr("udp", laddr)
+	if err != nil {
+		log.Fatal(err)
+	}
+	conn, err := net.ListenUDP("udp", addr)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	for {
+		b := make([]byte, 1024)
+		n, raddr, err := conn.ReadFromUDP(b)
+		if err != nil {
+			log.Fatal(err)
+		}
+		if _, err = conn.WriteToUDP(b[:n], raddr); err != nil {
+			log.Fatal(err)
+		}
+
+	}
+}