Posted on 2011-07-04 19:20
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Z.E.R.O.M.Q
源URL：http://lists.zeromq.org/pipermail/zeromq-dev/2010-February/002383.html
意思沒太懂，大概就是Z.E.R.O.M.Q主要是針對服務器間的通信，獲取客戶端連接IP的意義不大
Hi Fred,
>>> Just one question remains : were can I grab in the server
>>> environment the IP address and portnumber of the sending client ?
>> No way to do that at the moment, other than doing it at the app level
>> (make up a client ID / use the IP address and stick it in the
>> message).
Let me give some background here.
Simply said: 0MQ should manage connections for you. Your application
should be agnostic about exact location/identity of the peers. If you
want to work on the level of individual connections, use BSD sockets
rather than 0MQ.
More complex answer: The issue has to do with scaling 0MQ into internet
scales. What you want to know is the identity of the peer who sent the
message. You are not interested in any middleboxes that may be on the
way (like zmq_forwarder etc.) Thus, getting IP address we've received
the message from is useless - it's IP address of the previous hop. Also,
if IP address is used as the identity, two applications running on the
same box would look exactly the same. Same application bound to several
network interfaces would look different depending on how exactly you are
connected to it. Etc.
At the moment, the only thing you can do is to choose a name for your
application and fill it into the message. In easy to modify 0MQ to do
the thing for you, however, it's not a conceptual solution.
Real solution still requires a lot of research work. Feel free to start
the discussion though.
> OK, but that's (at least for me) not thrustworthy. Like SMTP telling me
> who they are. ;-)
What you would consider trustworthy, what kind of attacks should it be
resistent to, etc.
> You don't mind if I take a look at the sources to see whether it is
> doable for me ?
Sure. Go for it. Any experimentation is valuable! The source is licensed
under LGPL so you can modify it in any way given that you publish the
result under LGPL.
Martin