NDN-Trace is a measurement tool developed to retrieve certain information about an NDN network (RTTs, paths to a name, topology). The paper that describes the protocol in details was published in ACM ICN 2017.

Link to access the paper

• Siham Khoussi
• Davide Pesavento
• Lotfi Benmohamed
• Abdella Battou

• Install VERSION = "0.5.0" of ndn-cxx library and its prerequisites. Please see Getting Started with ndn-cxx for how to install ndn-cxx. If you are using a different version of ndn-cxx, use the following command (inside ndn-cxx) to get the required version:

  git checkout tags/ndn-cxx-0.5.0

• Install the NDN daemon NFD, VERSION = "0.5.0". If you are using a different version of NFD, use the following command (inside NFD) to get the required version:

  git checkout tags/NFD-0.5.0

• Clone Rapidjson into your home in a new folder named "include".

• Clone ndntrace into your home directory.

• From ndntrace/patches, apply the patch ws.patch inside ndn-cxx.

• Copy the two programs "trace_daemon" and "trace_client" into ndn-cxx/examples.

• From ndntrace/patches, apply the patch nackcpp.patch and nackhpp.patch inside ndn-cxx/src/lp.

• Apply the patch ws.patch to the wscript in ndn-cxx.

• To build ndn-cxx with the new changes run the following commands:

  ./waf configure --with-examples

  ./waf

  sudo ./waf install

The steps below provide guidance to integrate Trace changes into the ASF strategy as well as thebest route strategy:

• Open NFD directory

• From ndntrace/patches, apply the patches bestroutecpp.patch bestroutehpp.patch inside NFD/daemon/fw. To include NdnTrace changes to the best route strategy.

• From ndntrace/patches, apply the patches asfcpp.patch asfhpp.patch inside NFD/daemon/fw. To include NdnTrace changes to the ASF strategy.

• Build the daemon once more to include the changes by running the following commands:

  ./waf configure

  ./waf

  sudo ./waf install

To use NdnTrace on different/customized strategies, follow these steps:

• Change the field "YourDefaultStrategyHere" from strategy_components.hpp into the name of your strategy. Then copy it's content into it.

• Copy the content of strategy_component.cpp into your own strategy and call "Trace" function from within "afterReceiveInterest".

• Initialize "m_forwarder" in the constructer of your strategy class.

• Build the NFD with the above changes:

  ./waf configure

  ./waf

  sudo ./waf install

- run the trace_client and trace_daemon from ndn-cxx/build/examples:
- Run trace_daemon on every NDN node.
- On the tracing node run the client with

> trace_client -n <NAME> [-s|-m] [-p|-c] where:

  - -n specifies the traced name prefix. This is the only mandatory parameter.
  - -s and -m choose between single-path and multi-path tracing.
  - -p|-c indicates the type of tracing session: -p to trace a producer application, -c to find a cached copy.

Siham Khoussi [email protected]