I am looking to port lwip to a embedded processor. But first, I
wanted to test the performance of the TCP/IP stack on linux (ubuntu
7.10). I built the unixsim and minimal projects in the contrib unix
ports directory. When I run them with no options they work properly
(after fixing bug I filed: #22983). However, I cannot use them on the
network ... they only work locally. I would like to test the
performance by using netperf on the lwip and on a normal linux
machine. How do I let lwip access the outside world?
First, I noticed that the tap0 interface is configured by ifconfig
with the gateway instead of the IP address. Why is this?
Second, if I try something like:
./simhost -i 192.168.9.253 -g 192.168.9.253
I cannot connect to the TCP/IP side from another machine (on the
192.168.9.0 subnet), but I can get pings. I get "Connection Refused"
when I try to "telnet 192.168.9.253". I also tried something like:
./simhost -i 192.168.9.252 -g 192.168.9.253
In this case, .252 is not accessible at all and .253 exhibits the
same issues as above. Why would the gateway be accessible but not the
actual IP? It seems that this has something to do with ifconfig issue
above.
Can anyone give me some pointers as to how to move forward?
-rishi
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