mirror of
https://github.com/tailscale/tailscale.git
synced 2024-12-11 10:44:41 +00:00
48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package main
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import (
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"fmt"
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"os"
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"unsafe"
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"golang.org/x/sys/windows"
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"tailscale.com/util/winutil"
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)
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func main() {
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result, err := winutil.DNSQuery("www.tailscale.com", windows.DNS_TYPE_A, winutil.DNS_QUERY_STANDARD, nil, 0)
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if err != nil {
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fmt.Fprintln(os.Stderr, err)
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return
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}
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qresult := result.Wait()
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finalStatus := qresult.QueryStatus
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fmt.Printf("Query status: %v", finalStatus)
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if finalStatus != 0 {
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fmt.Printf(" (%v)\n", windows.Errno(finalStatus))
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} else {
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fmt.Printf("\n")
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}
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count := 0
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for rec := qresult.QueryRecords; rec != nil; rec = rec.Next {
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name := windows.UTF16PtrToString(rec.Name)
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fmt.Printf("Record %d: %s, type %v", count, name, rec.Type)
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switch rec.Type {
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case windows.DNS_TYPE_A:
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rd := (*winutil.DNSAData)(unsafe.Pointer(&rec.Data[0]))
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a := rd.IPv4Address
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fmt.Printf(" (A): %v.%v.%v.%v\n", a[0], a[1], a[2], a[3])
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case windows.DNS_TYPE_CNAME:
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rd := (*windows.DNSPTRData)(unsafe.Pointer(&rec.Data[0]))
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fmt.Printf(" (CNAME): %s\n", windows.UTF16PtrToString(rd.Host))
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default:
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fmt.Printf("\n")
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}
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count++
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}
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qresult.Close()
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}
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