go查看某段ip是否通的脚本
例1：
package main
import (
"fmt"
"golang.org/x/text/encoding/simplifiedchinese"
"os/exec"
"strings"
"sync"
)
func ping(ip string, pong chan string, wg *sync.WaitGroup) {
defer wg.Done()
cmd := exec.Command("ping", ip)
out, err := cmd.CombinedOutput()
if err != nil {
fmt.Printf("ping %s 失败, err:%s\n", ip, err)
pong <- fmt.Sprintf("%s ====> %v", ip, false)
return
}
output, err := simplifiedchinese.GBK.NewDecoder().Bytes(out)
if err != nil {
fmt.Printf("编码 %+v 失败, err:%s\n", out, err)
pong <- fmt.Sprintf("%s ====> %v", ip, false)
return
}
info := string(output)
fmt.Printf("ping %s 成功, 返回信息:%s\n", ip, info)
exist := strings.Contains(info, "TTL=")
if !exist {
pong <- fmt.Sprintf("%s ====> %v", ip, false)
return
}
pong <- fmt.Sprintf("%s ====> %v", ip, true)
}
func main() {
prex := "172.16.90."
start := 10
end := 30
result := make(chan string, end-start)
wg := sync.WaitGroup{}
wg.Add(end - start)
for i := start; i < end; i++ {
go ping(fmt.Sprintf("%s%d", prex, i), result, &wg)
}
wg.Wait()
close(result)
for v := range result {
fmt.Printf("%s\n", v)
}
}
运行
例2
package main
import (
"fmt"
"golang.org/x/text/encoding/simplifiedchinese"
"os/exec"
"strings"
)
type pinger struct {
ip string
tong chan bool
}
func (p *pinger) ping() {
fmt.Printf("ip:%s\n", p.ip)
cmd := exec.Command("ping", p.ip)
out, err := cmd.CombinedOutput()
if err != nil {
fmt.Printf("ping %s 失败, err:%s\n", p.ip, err)
p.tong <- false
return
}
output, err := simplifiedchinese.GBK.NewDecoder().Bytes(out)
if err != nil {
fmt.Printf("编码 %+v 失败, err:%s\n", out, err)
p.tong <- false
return
}
info := string(output)
fmt.Printf("ping %s 成功, 返回信息:%s\n", p.ip, info)
exist := strings.Contains(info, "TTL=")
if !exist {
p.tong <- false
return
}
p.tong <- true
}
func main() {
prex := "172.16.90."
start := 10
end := 30
var pingers []pinger
for i := start; i <= end; i++ {
pingers=append(pingers,pinger{ip: fmt.Sprintf("%s%d",prex,i),tong: make(chan bool,1)})
}
for _,v:=range pingers{
fmt.Printf("%s ===> %v\n",v.ip,v.tong)
}
for _,v:=range pingers{
p:=v
go p.ping()
}
for _,v:=range pingers{
fmt.Printf("%s ===> %v\n",v.ip,<-v.tong)
}
fmt.Println("结束")
}
运行
