This is a version of lwip running on Ubuntu

Install libpcap-dev

sudo apt-get install libpcap-dev

Go to the folder ./Debug, then run:

make clean; make

Must be run under root user

Under the header file ./lwip-2.0.2/test/linux/lwip.h, set TEST_ID to ECHO_SERVER

    #define TEST_ID 	ECHO_SERVER

Then, re-compile the source code, and run the lwip-linux app. Use puty to connect to server at port 6677.

Under the header file ./lwip-2.0.2/test/linux/lwip.h, set TEST_ID to TCP_CLIENT

    #define TEST_ID 	TCP_CLIENT

Then, re-compile the source code, and run the lwip-linux app.

Notes:

• The remote server address is being hard code at "192.168.2.12", we can modify this address via macro TCP_REMOTE_SERVER_ADDR under ./lwip-2.0.2/test/linux/lwip.h.
• Remote server port is 6677, it can be changed via macro TCP_REMOTE_SERVER_PORT.

• lwip-linux only supports 32 local server ports from 6677 to 6709. When we create a tcp server, please use the server port in this range.
• For local client ports, the lwip-linux supports to allocate port in range from 49152 to 49184.