| This directory contains an example of how a project using lwIP might |
| look. It is also the development platform of lwIP, since it can be run |
| as a user process under FreeBSD or Linux. There are also a number of |
| example applications (including a simple web server) in the apps/ |
| directory. |
| |
| Some short instructions on how to build and run lwIP on a FreeBSD or |
| Linux host. For FreeBSD, the tap interface must be enabled in the |
| kernel configuration and the kernel must be recompiled. The tap |
| interface is enabled by adding the line "pseudo-device tap" in the |
| kernel configuration. See Chapter 9 in the FreeBSD handbook for |
| instructions on how to build a custom FreeBSD kernel. |
| |
| * Compile the code. This must be done by using GNU Make. Under |
| FreeBSD, GNU Make can be found in the ports collection under |
| /usr/ports/devel/gmake (type "make install distclean" to |
| install). Under Linux, GNU Make is the default "make". |
| |
| > gmake (FreeBSD) |
| |
| > make (Linux) |
| |
| * The compilation process produces the executable file "simhost". To |
| run this, you have to be root. |
| |
| > su (Type password for the root account) |
| # ./simhost |
| |
| * The lwIP TCP/IP stack is now running with IP address |
| 192.168.0.2. Some things that you can try: |
| |
| To see the packets that are going to and from the lwIP stack, run |
| tcpdump: |
| |
| # tcpdump -l -n -i tap0 |
| |
| You can ping lwIP: |
| |
| > ping 192.168.0.2 |
| |
| For a telnet shell, run: |
| |
| > telnet 192.168.0.2 |
| |
| Finally, "simhost" also includes a simple web server; the URL is |
| of course http://192.168.0.2/. |
| |