Hi, there,

I am a newbie to lwIP

To start, I'd like to build a simple TCP echo server.

I used Rabbit's Dynamic C TCP/IP and finished a product based on that before, so I know the basic of TCP to certain degree.

I couldn't find the complete documentation of lwIP, so I was just reading the lwIP sample project from ATMEL's website. Although the sample demonstrated a combined services of HTTP/TFTP/SMTP, they all dealt with socket/netif directly, which I am not familiar with, not a single sample project calls tcp_* raw APIs, so I am having trouble to extract the pieces to make a TCP echo server.

I'v been struggling on this path for over a week, I wonder if anyone here is willing to show me some codes utilizing tcp_* raw APIs to get me started? If you have samples using other APIs to build a TCP echo server, I will also appreciate it

I am using AVR32 on EVK1100, but there is no need to be platform specific, a general/working lwIP sample on any platform will help.

Also, is there a place I can purchase/download the full documentation of lwIP?

Thanks in advance!

Chen 
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