[lwip-users] Making lwIP thread safe

[Bob McConnell]

Looking through the list archives, I get the impression that lwIP is not 
fully thread safe. How much work will be involved to correct this 
problem, and is anyone working on it now?

Why? I have a project to prototype a test bench at work that requires 
multiple instances of a TCP/IP stack connecting to TUN/TAP devices on 
FreeBSD or Linux to emulate a network of embedded devices. The host OS 
will act as a firewall/router and each instance of the stack will have a 
unique IP address. The goal is to emulate a couple thousand devices. I 
would like to build a prototype that creates 200 instances using 
pthreads. I can probably do it with 200 processes, but that will be much 
more difficult to control and manage. The network traffic will also be 
channeled through Dummynet for reliability and performance testing.

I have some related questions about keep-alive configurations, but will 
send them separately.

Thank you,

Bob McConnell
N2SPP