/
gudp_func.go
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/
gudp_func.go
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// Copyright 2017-2018 gf Author(https://github.com/gogf/gf). All Rights Reserved.
//
// This Source Code Form is subject to the terms of the MIT License.
// If a copy of the MIT was not distributed with this file,
// You can obtain one at https://github.com/gogf/gf.
package gudp
import (
"net"
)
// 创建标准库UDP链接操作对象
func NewNetConn(raddr string, laddr ...string) (*net.UDPConn, error) {
var err error
var remoteAddr, localAddr *net.UDPAddr
remoteAddr, err = net.ResolveUDPAddr("udp", raddr)
if err != nil {
return nil, err
}
if len(laddr) > 0 {
localAddr, err = net.ResolveUDPAddr("udp", laddr[0])
if err != nil {
return nil, err
}
}
conn, err := net.DialUDP("udp", localAddr, remoteAddr)
if err != nil {
return nil, err
}
return conn, nil
}
// (面向短链接)发送数据
func Send(addr string, data []byte, retry ...Retry) error {
conn, err := NewConn(addr)
if err != nil {
return err
}
defer conn.Close()
return conn.Send(data, retry...)
}
// (面向短链接)发送数据并等待接收返回数据
func SendRecv(addr string, data []byte, receive int, retry ...Retry) ([]byte, error) {
conn, err := NewConn(addr)
if err != nil {
return nil, err
}
defer conn.Close()
return conn.SendRecv(data, receive, retry...)
}
// 判断是否是超时错误
func isTimeout(err error) bool {
if err == nil {
return false
}
if netErr, ok := err.(net.Error); ok && netErr.Timeout() {
return true
}
return false
}