go语言渐入佳境-网络[1]-ipaddress

net包中的ip类型存储ip地址

type IP []byte

/* IP
 */

package main

import (
    "net"
    "os"
    "fmt"
)

func main() {
    if len(os.Args) != 2 {
        fmt.Fprintf(os.Stderr, "Usage: %s ip-addr\n", os.Args[0])
        os.Exit(1)
    }
    name := os.Args[1]

    addr := net.ParseIP(name)
    if addr == nil {
        fmt.Println("Invalid address")
    } else {
        fmt.Println("The address is ", addr.String())
    }
    os.Exit(0)
}

测试：

$ go build .
$ ./net 127.0.0.1
The address is  127.0.0.1