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apps | ||
lwipopts.h | ||
Makefile | ||
README | ||
simhost.c | ||
simnode.c | ||
simrouter.c |
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/.