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11-Sep-2013 |
Alex Deymo <deymo@chromium.org> |
lansim: Add a LAN simulator in python to use in tests.
lansim is a LAN simulator that runs over a TAP network interface and
allows to simulate network traffic on that interface from Python code.
A TAP interface is a virtual network kernel device that acts as any
other network interface, except that instead of sending and receiving
the traffic through a hardware interface it allows a given program to
handle that traffic through a socket. It is essentially a
bi-directional pipe where one side is a network interface and the
other side is a socket on a program.
This simulator is useful on situations where you can't fake a network
service using the normal kernel network stack. For example, if you
need to fake a network of several hosts publishing services via mDNS
with multicast you can write those services using this simulator but
it's more complicated to do the same using the system's network stack
since an outbound multicast packet will be sent out on the real
interface.
The simulator consists on various Python modules with the logic
and a small C module that exposes many system dependent constants
to Python. The C module is required to expose the architecture
dependent constants.
BUG=chromium:288385
TEST=Ran "make install test" on lansim/src/ (runs unittests).
Change-Id: I5475e445046ce505503627f48ed4ab220a6cfef2
Reviewed-on: https://chromium-review.googlesource.com/168882
Reviewed-by: Chris Sosa <sosa@chromium.org>
Commit-Queue: Alex Deymo <deymo@chromium.org>
Tested-by: Alex Deymo <deymo@chromium.org>
/external/autotest/client/deps/lansim/lansim.py
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