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Re: Resolver API question

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On Tue, 29 Mar 2016 11:35:00 -0400
Barry Margolin <barmar@alum.mit.edu> wrote:
>In article <nddn6b$eqk$1@gioia.aioe.org>, spud@potato.field wrote:
>
>> I'm trying to decode the rdata field returned in a resource record by the
>> ns_parserr() function. eg:
>> 
>> ns_parserr(&msg,ns_s_an,i,&r_rec);
>> rdata = ns_rr_rdata(r_rec);
>> 
>> However the ns_name_uncompress() function only seems to work with rdata in
>NS 
>> records and using it on other types either produces garbage or an error but 
>> the
>> rdata pointer still cannot be printed out directly. 
>> 
>> Does anyone know how to translate it for A and MX records? I know I could
>use 
>> ns_sprintferr() and then parse the output string but thats a bit ugly. There 
>> must be an nicer way.
>
>There's no name in the rdata of an A record, it just has an IP address, 
>which is in binary. And for an MX record you have to skip over the 
>priority field to get to the server name.

I'm presuming that priority field is a subfield of the rdata field in the
resource record because its not a field defined in the ns_rr structure?

--
Spud

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Resolver API question spud@potato.field - 2016-03-29 10:59 +0000
  Re: Resolver API question Barry Margolin <barmar@alum.mit.edu> - 2016-03-29 11:35 -0400
    Re: Resolver API question spud@potato.field - 2016-03-29 15:52 +0000
      Re: Resolver API question Rainer Weikusat <rweikusat@talktalk.net> - 2016-03-30 15:54 +0100

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