ndnSIM Release Notes¶
This file contains ndnSIM release notes.
All of the ndnSIM documentation is accessible from the ndnSIM website.
Release 2.1 (Changes since release 2.0)¶
Release date: September 4, 2015
Overview¶
Integration with ndn-cxx and NFD codebases has been refactored to include ndn-cxx and NFD repositories as git submodules within ndnSIM repository (Issue #3138).
This refactoring simplifies upgrading ndn-cxx and NFD to new versions and prevents old simulation code to break because of API changes in newer versions of ndn-cxx library.
Note
In order to retrieve the marked versions of ndn-cxx and NFD, use
--recursive
option to the git clone command or rungit submodule update --init
after clone, pull, or merge.The official home for ndnSIM codebase has been moved to GitHub named-data-ndnSIM organization (Issue #3123):
Modified version of NS-3 was updated to (rebased on top of) version 2.23-dev, with ndnSIM codebase adjusted to reflect API changes (Issue #3122)
NFD and ndn-cxx has been upgraded to version 0.3.4 (Issue #3125)
New features¶
ndnSIM-specific version of ndn::Face (Issue #2370)
The updated version of ndn::Face specially designed to allow writing simulation applications in the same way as real applications. It is also possible to directly use codebase of the existing applications to drive simulations, provided that the codebase meets or can be adjusted to meet the requirements listed in Simulating real NDN applications.
Full support for NFD’S RIB manager (Issue #2370)
Note
RIB manager support is currently available only for applications based on ndn-cxx. FibHelper::AddRoute() and FibHelper::RemoveRoute() used by ndn::Producer and ndn::GlobalRoutingHelper are currently interacting directly with NFD’s FIB manager. This issue will be resolved in the next release of ndnSIM (Issue #3121)
Tutorial and example on how to speed up simulations with MPI module of NS-3: http://ndnsim.net/2.0/parallel-simulations.html
Two new helpers to simplify writing basic simulation scenarios:
ScenarioHelper leverages C++11 constructs to write scenarios. Example:
ScenarioHelper helper; helper.createTopology({ {"1", "2"}, {"2", "3"} }); helper.addRoutes({ {"1", "2", "/prefix", 1}, {"2", "3", "/prefix", 1} }); helper.addApps({ {"1", "ns3::ndn::ConsumerCbr", {{"Prefix", "/prefix"}, {"Frequency", "1"}}, "0s", "100s"}, {"3", "ns3::ndn::Producer", {{"Prefix", "/prefix"}, {"PayloadSize", "1024"}}, "0s", "100s"} });
FactoryCallbackApp simplifies creation of basic apps without creating a separate class that is derived from
ns3::Applications
. Example:class SomeApp { public: SomeApp(size_t initParameter); ... }; FactoryCallbackApp::Install(node, [] () -> shared_ptr<void> { return make_shared<SomeApp>(42); }) .Start(Seconds(1.01));
Improvements and bug fixes¶
- Updates of ndnSIM documentation
- Updated the structure for the ndnSIM website index page
- Updated installation instructions to reflect refactoring and relocation of ndnSIM codebase
- API documentation (doxygen) improvements
- Updated list of ndnSIM research papers
- The NDN stack can now be updated to handle any simulation topology changes after its initial installation on a node (Issue #2717)
- Application ID that appears in ndn::AppDelayTracer output is now ID of the application on the node, not ID of the application face that was used previously.
- FibHelper has been extended to support route removals (Issue #2358)
- ndnSIM codebase now partially covered with unit-tests (Issue #2369, Issue #3059, Issue #2783)
- Bugfixes:
- In ndn::GlobalRoutingHelper::CalculateAllPossibleRoutes() that caused crash in some cases (Issue #2535)
- In FailLink and Uplink methods of ndn::LinkControlHelper class that affected more links than requested (Issue #2783)
- With hop count of data packets retrieved from the Contest Store of NFD (Issue #2764)
- In ndn::Producer application that caused a wrong dummy signature to be added to the constructed data packets (Issue #2927)
Release 2.0 (Changes since release 1.0)¶
Release date: January 13, 2015
Overview¶
ndnSIM 2.0 is a new release of NS-3 based Named Data Networking (NDN) simulator that went through extensive refactoring and rewriting. The key new features of the new version:
- ndnSIM no longer re-implements basic NDN primitives and directly uses implementation from ndn-cxx library (NDN C++ library with eXperimental eXtensions).
- All NDN forwarding and management is implemented directly using source code of Named Data
Networking Forwarding Daemon (NFD). The current code is based
on
a22a2172611b1cb93b2e2f53d9d5da122b384f3e
commit of NFD repository.
Note RIB Manager is not yet available in ndnSIM.
- Packet format changed to the NDN packet format.
- Code style changes to conform to ndn-cxx Code Style and Coding
Guidelines This change also
includes renaming of the header and source files:
*.h
->*.hpp
,*.cc
->*.cpp
- ndnSIM now uses C++11.
New Features¶
- Integration with NFD codebase.
- A realistic behavior is added to the simulations.
- Forwarding plane extensions can be used in both ndnSIM simulations and real NFD deployment.
- Per namespace forwarding strategies for different namespaces (one strategy per namespace).
- New examples:
ndn-load-balancer
ndn-grid-multiple-strategies
ndn-different-strategy-per-prefix
- Basic examples using python bindings:
ndn-simple.py
andndn-grid.py
- Use of the the full-featured NDN packet format.
- Full-featured support for Interest selectors.
- Full-featured crypto operations can be simulated (disabled by default).
- FibHelper to manage FIB entries.
- StrategyChoiceHelper to manage per-namespace forwarding strategy selection.
Changes¶
- HopCount tracing now includes only one way network-level hop count (e.g., the number of physical links traversed by a packet). Previously, this tracing was round-trip and included applications hops.
- Python bindings have changed and, due to limitations of pybindgen, currently cover a smaller subset of C++ code (Task #2341).
- LinkControlHelper now uses ErrorRate to simulate link failure/recovery. Previously it was relying on Up/Down flag on NDN level.
- The Face abstraction of NFD is now used.
Bug fixes¶
- Fix processing files with customized LossRate or Queue model in AnnotatedTopologyReader Bug #2354.
Removals¶
- PyNDN emulation
- (temporarily) ApiFace. Will be replaced with emulation of ndn-cxx
ndn::Face
in future releases (Issue #2370). - (temporarily) UdpFace, TcpFace (Issue #2371).
- Limits, LimitsWindow, LimitsRate.
- PIT, FIB with “replacement” policies.
- Old deprecated packet formats.