package backtrace

import (
	"fmt"
	"time"
)

func BackTrace() {
    // 获取IP地址数量
    ipCount := len(ipv4s)
    var (
        s = make([]string, ipCount) // 动态分配切片大小
        c = make(chan Result)
        t = time.After(time.Second * 10)
    )
    for i := range ipv4s {
        go trace(c, i)
    }
    
loop:
    for range s {
        select {
        case o := <-c:
            s[o.i] = o.s
        case <-t:
            break loop
        }
    }
    
    for _, r := range s {
        if r != "" {
            fmt.Println(r)
        }
    }
}