support udp type

src/utils/conn/udp_conn.go

@@ -0,0 +1,29 @@
+// Copyright 2016 fatedier, fatedier@gmail.com
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package conn
+
+import (
+	"fmt"
+	"net"
+)
+
+func ListenUDP(bindAddr string, bindPort int64) (conn *net.UDPConn, err error) {
+	udpAddr, err := net.ResolveUDPAddr("udp", fmt.Sprintf("%s:%d", bindAddr, bindPort))
+	if err != nil {
+		return conn, err
+	}
+	conn, err = net.ListenUDP("udp", udpAddr)
+	return
+}