def send_answer(ans, original_cxn)
      fail "Must pass an answer" unless ans.answer
      ans.add_origin_host_and_realm(@local_host, @local_realm) 
      @tcp_helper.send(ans.to_wire, original_cxn)
    end
def send_answer(ans, original_cxn)
      fail "Must pass an answer" unless ans.answer
      ans.add_origin_host_and_realm(@local_host, @local_realm) 
      @tcp_helper.send(ans.to_wire, original_cxn)
    end
Sends a Diameter answer. This is sent over the same connection
 the request was received on (which needs to be passed into to
 this method).

 This adds this stack's Origin-Host and Origin-Realm AVPs, if
 those AVPs don't already exist.

 @param ans [Message] The Diameter answer
 @param original_cxn [Socket] The connection which the request
   came in on. This will have been passed to the block registered
   with {Stack#add_handler}.