[Click] ftp over modular router

[Eddie Kohler]

Hi Sedi,

Basically you want to build a transparent traffic diverter.  You will need to 
use the NAT elements and FromHost to make this work.  Basically, what you will 
want to do is this: (1) Use a Click element to classify packets into rate 
classes.  (2) Run each class through an IPRewriter, which rewrites the packets 
so they look like they come from some unexpected address class, such as 
10.255.255.0/24.  (3) Send the results ToHost.  (4) Write a FromHost element 
that outputs packets sent to 10.255.255.0/24.  (5) Send those packets back 
through the IPRewriter.

See Figure 8 in our OpenArch 2002 paper, "Modular components for network 
address translation"; and then check out this fragment, which I have not 
tested at all.

c :: TrafficClassifier; // outputs c[0]...c[2] are the 3 classes

iprwpattern :: IPRewriterPatterns(pat 10.255.255.1 1024-65535 - -);

iprw :: IPRewriter(pattern pat 0 1,
                    pattern pat 0 2,
                    pattern pat 0 3,
                    drop);

c[0] -> [0]iprw;
c[1] -> [1]iprw;
c[2] -> [2]iprw;

iprw[0] -> ToHost;

FromHost(fake0, 10.255.255/24)
     -> /* Classifier/ARP machinery from Figure 8 of named paper, or
           man FromHost */;

/*FromHost IP packets*/ -> [3]iprw;

iprw[1] -> /* traffic class 0 to network */
iprw[2] -> /* traffic class 1 to network */
iprw[3] -> /* traffic class 2 to network */


Eddie


Lesedi wrote:
> Hello,
> 
> I have a problem.I wrote a code using click language.In the program I am
> classifying packets according to their destinations,then im using shaper to
> send packets out the output at different traffic rates(packets / seconds)
> 
> 1) I now  have installed FTP server in my machine and I want to make it run
> over the code,in other words, to make the ftp packets to go through the
> click code i have so that they are classified according to their destination
> and sent to the client at different traffic rates.
> .
> At the moment i have an FTP server and a code,they are separate but want to
> connect them don't know how.Could you please help me on this?
> 
> I tried looking into FTPPortMapper but understood it as implementing NAT
> similar functions..
> 
> thanking you in advace
> sedi
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