
在项目中,我们需要知道哪些IP是可用IP,这时候想到了用ICMP(Internet控制报文协议)。可以使用开源库–github.com/sparrc/go-ping来判断是否能ping通。
使用–github.com/sparrc/go-ping开源库判断是否能ping通的代码:
func ServerPing(target string) bool {
pinger, err := ping.NewPinger(target)
if err != nil {
panic(err)
}
pinger.Count = ICMPCOUNT
pinger.Timeout = time.Duration(PINGTIME*time.Millisecond)
pinger.SetPrivileged(true)
pinger.Run()// blocks until finished
stats := pinger.Statistics()
fmt.Println(stats)
// 有回包,就是说明IP是可用的
if stats.PacketsRecv >= 1 {
return true
}
return false
}这里是通过回包数量来判断的,也可以通过掉包率来判断。同时,该库提供了Statistics结构体,包含了详细的ICMP信息,如下
type Statistics struct {
// PacketsRecv is the number of packets received.
PacketsRecv int
// PacketsSent is the number of packets sent.
PacketsSent int
// PacketLoss is the percentage of packets lost.
PacketLoss float64
// IPAddr is the address of the host being pinged.
IPAddr *net.IPAddr
// Addr is the string address of the host being pinged.
Addr string
// Rtts is all of the round-trip times sent via this pinger.
Rtts []time.Duration
// MinRtt is the minimum round-trip time sent via this pinger.
MinRtt time.Duration
// MaxRtt is the maximum round-trip time sent via this pinger.
MaxRtt time.Duration
// AvgRtt is the average round-trip time sent via this pinger.
AvgRtt time.Duration
// StdDevRtt is the standard deviation of the round-trip times sent via
// this pinger.
StdDevRtt time.Duration
}立即学习“go语言免费学习笔记(深入)”;
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