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go语言实现udp服务端和客户端

关键词: golang

go语言实现udp服务端和客户端

`s.go`

```
package main

import (
    "net"
    "os"
    "log"
)

func main() {
    var server string = "0.0.0.0:2048"
    addr, err := net.ResolveUDPAddr("udp4", server)
    if err != nil {
        os.Exit(1)
    }
    conn, err := net.ListenUDP("udp", addr)
    if err != nil {
        os.Exit(1)
    }
    log.Println("udp server is running on " + server)
    for {
        handleClient(conn)
    }
}

func handleClient(conn *net.UDPConn) {
    defer conn.Close()
    var buffer [1024]byte
    for {
        n, addr, err := conn.ReadFromUDP(buffer[0:])
        if err != nil {
            return
        }
        log.Println(string(buffer[0:n]))
        _, err = conn.WriteToUDP(buffer[0:n], addr)
        if err != nil {
            return
        }
    }
}
```

`c.go`

```
package main

import (
    "net"
    "os"
    "log"
)

func main() {
    conn, err := net.Dial("udp", "127.0.0.1:2048")
    defer conn.Close()
    if err != nil {
        os.Exit(1)
    }
    conn.Write([]byte("Hello world"))
    var buffer [1024]byte
    n, err := conn.Read(buffer[0:])
    if err != nil {
        os.Exit(1)
    }
    log.Println(string(buffer[0:n]))
}
```

admin
2017-07-29 13:01:53
go

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go语言实现udp服务端和客户端