On Feb 17, 2004, at 6:31 AM, Scott Atchley wrote:
> On Feb 17, 2004, at 12:07 AM, Marc Krochmal wrote:
>
>> Scott,
>>
>> On Feb 15, 2004, at 9:38 AM, Scott Atchley wrote:
>>
>>> I was thinking that we would need to build the mDNSResponder into
>>> our server, but it seems that we should simply provide a link in our
>>> documentation to where our users can get it at Apple if they want to
>>> run this on *nix or Windows. We would then make using
>>> Rendezvous/ZeroConf an optional part of our server configuration
>>> (--with-mdns=<path>). If configured to use Rendezvous/ZeroConf, then
>>> it would start up, announce itself and then listen for requests.
>>
>> I'm not sure what your target audience is. If your user's don't mind
>> agreeing to the APSL by registering in order to get a user name and
>> password, and if they don't mind learning how to use cvs to get the
>> latest mDNSResponder that includes the daemon for *nix, then yes this
>> is one solution. However, I wouldn't recommend this. Is there a
>> problem with bundling the daemon with your server?
>
> Can more than one mDNSResponder exist on a host? If not, then I don't
> want to assume that our server will be able to run one. If so, how do
> they both listen on the same multicast port?
With multicast, you can have multiple sockets sharing the same port.
All of the sockets must us the SO_REUSEPORT socket option.
> Correct me if I am wrong, but it seems to me that the mDNSResponder
> daemon simply caches previous service advertisements so that clients
> on the same machine can query it and keep overall network traffic
> down. Does it do anything else? If there is not a client on the same
> host, what purpose does it serve? Does it reply to service requests
> over the network instead of the actual service provider (our server in
> this case)?
The responder does more than this. The responder also combines queries
in to a single packet and when responding, it puts multiple answers to
different queries in to the same packet. These few things significantly
reduce the traffic generated.
-josh
[demime 0.98b removed an attachment of type application/pkcs7-signature which had a name of smime.p7s]
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