1、什么是fping
fping 是一个类似 ping 的程序,与 ping 不同的是你可以同时指定多个要 ping 的目标。
fping 发送完 ping 包后不等待回应,而是继续下一个目标
3、具体实现
1.获取IP段
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// IP段
'1', '2020-11-26 17:11:39.515', '2020-11-26 17:11:39.515', '1.0.1.0', '1.0.3.255', '福建', '电信'
'2', '2020-11-26 17:11:43.553', '2020-11-26 17:11:43.553', '1.0.8.0', '1.0.15.255', '广东', '电信'
'3', '2020-11-26 17:11:47.563', '2020-11-26 17:11:47.563', '1.0.32.0', '1.0.63.255', '广东', '电信'
'4', '2020-11-26 17:11:53.621', '2020-11-26 17:11:53.621', '1.1.0.0', '1.1.0.255', '福建', '电信'
'5', '2020-11-26 17:11:57.635', '2020-11-26 17:11:57.635', '1.1.2.0', '1.1.7.255', '福建', '电信'
'6', '2020-11-26 17:11:59.642', '2020-11-26 17:11:59.642', '1.1.8.0', '1.1.63.255', '广东', '电信'
'7', '2020-11-26 17:12:05.671', '2020-11-26 17:12:05.671', '1.2.0.0', '1.2.1.255', '福建', '电信'
'8', '2020-11-26 17:12:07.674', '2020-11-26 17:12:07.674', '1.2.2.0', '1.2.2.255', '北京', '联通'
'9', '2020-11-26 17:12:13.690', '2020-11-26 17:12:13.690', '1.2.5.0', '1.2.7.255', '北京', '电信'
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2.ping方法(单个,多个已给出)
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// 单个ping
// IsAlivePing : 检测目标IP是否能够ping通,target为目标IP
func IsAlivePing(target string) (bool, error) {
pinger, err := ping.NewPinger(target)
if err != nil {
return false, err
}
pinger.Count = 10
PINGTIME := time.Duration(1000)
pinger.Timeout = time.Duration(PINGTIME * time.Millisecond)
pinger.SetPrivileged(true) // 选择icmp,不选择udp
pinger.Run()
stats := pinger.Statistics()
// 判断是否有接收到的包
if stats.PacketsRecv >= 1 {
return true, nil
}
return false, nil
}
// 多个ping:得到死IP
// FilterActiveIPs : 过滤活IP,筛选出死IP
func FilterActiveIPs(ips []string) (inactiveIPs []string) {
var lock sync.Mutex
var wg sync.WaitGroup
wg.Add(len(ips))
for _, ip := range ips {
go func(ip string) {
defer wg.Done()
// 判断是死ip,并且格式正确
isAlive, err := IsAlivePing(ip)
if !isAlive && err == nil {
RandomSleep(2) // 睡眠[1,2]秒,二次确认是否为死IP
if isAlive, _ := IsAlivePing(ip); !isAlive {
RandomSleep(2) // 再睡眠[1,2]秒,三次确认是否为死IP
if isAlive, _ := IsAlivePing(ip); !isAlive {
lock.Lock()
defer lock.Unlock()
inactiveIPs = append(inactiveIPs, ip)
}
}
}
}(ip)
}
wg.Wait()
return inactiveIPs
}
// 多个ping:得到活IP
// FilterInactiveIPs : 过滤死IP,筛选出活IP
func FilterInactiveIPs(ips []string) (activeIPs []string) {
var lock sync.Mutex
var wg sync.WaitGroup
wg.Add(len(ips))
for _, ip := range ips {
go func(ip string) {
defer wg.Done()
// 判断是活ip,并且格式正确
if isAlive, err := IsAlivePing(ip); isAlive && err == nil {
lock.Lock()
defer lock.Unlock()
activeIPs = append(activeIPs, ip)
}
}(ip)
}
wg.Wait()
return activeIPs
}
// RandomSleep : 随机睡眠[1,t]秒
func RandomSleep(t int) {
rand.Seed(time.Now().UnixNano())
r := time.Duration(rand.Intn(t) + 1)
time.Sleep(r * time.Second)
}
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3.分解IP段
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// Separation : 分解IP段
func (i *impl) Separation(minIP, maxIP string) []string {
shouldStrs := make([]string, 0) // 这是IP段的所有IP
// for i := 0; i < l; i = i + 2 {
min, _ := IPString2Long(minIP) // 这里有一个转化,我默认给的是正确的IP,如果兄弟们不确定传入的IP格式是否正确,那么要判断err
max, _ := IPString2Long(maxIP)
for min <= max {
minIPstr, _ := Long2IPString(min)
xxxip := net.ParseIP(minIPstr).To4()
if xxxip[3] != 0 && xxxip[3] != 255 { // 兄弟们,这个判断取决于你们想不想要两个端点
shouldStrs = append(shouldStrs, minIPstr)
}
min++
}
// TODO: 兄弟们,可以把这句删除了
fmt.Printf("IP段%s--%s不包括两端的长度: %d\n", minIP, maxIP, len(shouldStrs))
return shouldStrs
}
// Long2IPString 把数值转为ip字符串
func Long2IPString(i uint) (string, error) {
if i > math.MaxUint32 {
return "", errors.New("beyond the scope of ipv4")
}
ip := make(net.IP, net.IPv4len)
ip[0] = byte(i >> 24)
ip[1] = byte(i >> 16)
ip[2] = byte(i >> 8)
ip[3] = byte(i)
return ip.String(), nil
}
// IPString2Long 把ip字符串转为数值
func IPString2Long(ip string) (uint, error) {
b := net.ParseIP(ip).To4()
if b == nil {
return 0, errors.New("invalid ipv4 format")
}
return uint(b[3]) | uint(b[2])<<8 | uint(b[1])<<16 | uint(b[0])<<24, nil
}
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原文链接:https://blog.csdn.net/ppthr/article/details/110277872