Erlang DNS TXT, MX record look up

I was exploring how to query DNS and do some probing on various types of information like MX and TXT records.
Here is the simple API
 Step:1         inet_res:nslookup("domain.com", 1, txt).                                                                           
It is always advisable to use another function, to convert it from internal record type to list,
 Step:2        inet_dns:msg(Return_from_Step1)                                                                                                    

 Step:3        inet_dns:rr( Return_from_Step2)                                                                                                           



Step:2 always return list or tuple of error message. So return value from the Step:2 should be processed.




Here is the complete code which returns "TXT" rr record, you can substitute mx for "MX" records,

lookup(Domain, VerifyingText) ->

 case inet_res:nslookup(Domain, 1, txt) of 

  {ok, Record} ->

   DnsRr = case inet_dns:msg(Record, anlist) of 

           DnsRrList when is_list(DnsRrList) -> hd(DnsRrList);

     _ -> []

           end,

   io:format("IS of type ~p ~n", [is_list(DnsRr)]),

   inet_dns:rr(DnsRr, data);

  _-> false

 end.

Pass the domain name to the lookup, you will get the list of records.


 More here http://www.erlang.org/doc/man/inet_res.html