rwth-netprg/project

Netem Tool

This tool uses the 3-way TCP handshake to measure the real RTT of a TCP connection.

Usage

Run TCP SYN/ACK probes to measure round-trip-time (RTT):

./netem probe 8.8.8.8 > probing.dat

The output of this command and be stored in a file or directly passed to the emulate subcommand:

./netem probe 8.8.8.8 | ./netem emulate
./netem emulate < probing.dat

Building

Install libnl

git submodule init git submodule update

cd libnl/ autreconf -i ./configure make make install

Install netem

Just run make.

Dependencies

• libnl3 (3.2.26)
• recent Linux Kernel version

For building libnl (make libnl)

• libtool
• bison
• flex
• autotools

See also

• http://www.infradead.org/~tgr/libnl/
• https://www.kernel.org/doc/Documentation/networking/timestamping.txt
• tc-netem(8)

Author

Steffen Vogel post@steffenvogel.de

This tool was developed as a project for the Network Programming Laboratory of the Institute for Networked Systems, RWTH Aachen University, in summer 2015.

License

Copyright (C) 2015 Steffen Vogel

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.