You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
52 lines
1.1 KiB
Go
52 lines
1.1 KiB
Go
5 years ago
|
package ping
|
||
|
|
|
||
|
|
import (
|
||
|
|
"context"
|
||
|
|
"fmt"
|
||
|
|
"net"
|
||
|
|
"strings"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
func timeIt(f func() interface{}) (int64, interface{}) {
|
||
|
|
startAt := time.Now()
|
||
|
|
res := f()
|
||
|
|
endAt := time.Now()
|
||
|
|
return endAt.UnixNano() - startAt.UnixNano(), res
|
||
|
|
}
|
||
|
|
|
||
|
|
// UseCustomeDNS will set the dns to default DNS resolver for global
|
||
|
|
func UseCustomeDNS(dns []string) {
|
||
|
|
resolver := net.Resolver{
|
||
|
|
PreferGo: true,
|
||
|
|
Dial: func(ctx context.Context, network, address string) (conn net.Conn, err error) {
|
||
|
|
for _, addr := range dns {
|
||
|
|
if conn, err = net.Dial("udp", addr+":53"); err != nil {
|
||
|
|
continue
|
||
|
|
} else {
|
||
|
|
return conn, nil
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return
|
||
|
|
},
|
||
|
|
}
|
||
|
|
net.DefaultResolver = &resolver
|
||
|
|
}
|
||
|
|
|
||
|
|
// FormatIP - trim spaces and format IP
|
||
|
|
//
|
||
|
|
// IP - the provided IP
|
||
|
|
//
|
||
|
|
// string - return "" if the input is neither valid IPv4 nor valid IPv6
|
||
|
|
// return IPv4 in format like "192.168.9.1"
|
||
|
|
// return IPv6 in format like "[2002:ac1f:91c5:1::bd59]"
|
||
|
|
func FormatIP(IP string) string {
|
||
|
|
|
||
|
|
host := strings.Trim(IP, "[ ]")
|
||
|
|
if parseIP := net.ParseIP(host); parseIP != nil && parseIP.To4() == nil {
|
||
|
|
host = fmt.Sprintf("[%s]", host)
|
||
|
|
}
|
||
|
|
|
||
|
|
return host
|
||
|
|
}
|