mirror of
https://github.com/impact-eintr/netstack.git
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41 lines
723 B
Go
41 lines
723 B
Go
package main
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import (
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"flag"
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"log"
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"net"
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)
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func main() {
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var (
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addr = flag.String("a", "192.168.1.1:9999", "udp dst address")
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)
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log.SetFlags(log.Lshortfile | log.LstdFlags)
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var err error
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udpAddr, err := net.ResolveUDPAddr("udp", *addr)
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if err != nil {
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panic(err)
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}
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// 建立UDP连接（只是填息了目的IP和端口，并未真正的建立连接）
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conn, err := net.DialUDP("udp", nil, udpAddr)
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if err != nil {
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panic(err)
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}
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send := []byte("hello world")
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if _, err := conn.Write(send); err != nil {
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panic(err)
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}
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log.Printf("send: %s", string(send))
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recv := make([]byte, 32)
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rn, _, err := conn.ReadFrom(recv)
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if err != nil {
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panic(err)
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}
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log.Printf("recv: %s", string(recv[:rn]))
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}
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