Method: HTTPX::Resolver.decode_dns_answer

Defined in:
lib/httpx/resolver.rb

.decode_dns_answer(payload) ⇒ Object 



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# File 'lib/httpx/resolver.rb', line 116

def decode_dns_answer(payload)
  begin
    message = Resolv::DNS::Message.decode(payload)
  rescue Resolv::DNS::DecodeError => e
    return :decode_error, e
  end

  # no domain was found
  return :no_domain_found if message.rcode == Resolv::DNS::RCode::NXDomain

  return :message_truncated if message.tc == 1

  return :dns_error, message.rcode if message.rcode != Resolv::DNS::RCode::NoError

  addresses = []

  message.each_answer do |question, _, value|
    case value
    when Resolv::DNS::Resource::IN::CNAME
      addresses << {
        "name" => question.to_s,
        "TTL" => value.ttl,
        "alias" => value.name.to_s,
      }
    when Resolv::DNS::Resource::IN::A,
         Resolv::DNS::Resource::IN::AAAA
      addresses << {
        "name" => question.to_s,
        "TTL" => value.ttl,
        "data" => value.address.to_s,
      }
    end
  end

  [:ok, addresses]
end