Go Systems Programming

Getting NS records for a domain

This subsection will present an additional kind of DNS lookup that returns the domain name servers for a given domain. This is very handy for troubleshooting DNS-related problems and finding out the status of a domain. The presented program will be named lookNS.go and will be presented in three parts.

The first part of the utility is the following:

package main 
 
import ( 
   "fmt" 
   "net" 
   "os" 
) 

The second part has the following Go code:

func main() { 
   arguments := os.Args 
   if len(arguments) == 1 { 
         fmt.Println("Please provide a domain!") 
         os.Exit(100) 
   } 
 
   domain := arguments[1] 
 
   NSs, err := net.LookupNS(domain) 

The net.LookupNS() function does all the work for us by returning a slice of NS elements.

The last part of the ...