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Ns 3 Dev
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17adb4fa
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17adb4fa
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16 years ago
by
Mathieu Lacage
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update release notes
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RELEASE_NOTES
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@@ -6,61 +6,90 @@ This file contains ns-3 release notes (most recent releases first).
Release 3.2 (pending)
=====================
New functionality added
-----------------------
- Add learning bridge (IEEE 802.1D) implementation: BridgeNetDevice;
- Python bindings added
- Kernel thread support (class SystemThread) added;
- Kernel mutual exclusion support (class SystemMutex) added;
- Kernel critical section RAII support (class CriticalSection) added;
- Kernel system condition support (class SystemCondition) added;
- Move required methods in helper classes to constructors;
- Change obsolete references to Parameter to Attribute in helpers;
- Split simulator into interface and implementation pieces, make
implementation a replaceable component via the
"SimulatorImplementationType" global value.
Hint: try ./waf --run "udp-echo --PrintGlobals"
- Added multithreaded and real-time simulator implementation;
- implement Packet::PeekHeader and Packet::PeekTrailer to avoid evil workarounds when receiving tcp packets.
Bugs fixed
----------
- add optional support for TCP and UDP checksum (bug 236)
- close socket upon PacketSink::StopApplication (bug 243)
- fix build failure with gcc 4.3.x (bug 245)
API changes from 3.1 to 3.2
---------------------------
- several helper APIs related to attribute setting (changeset d5f8e5fae1c6,
bug 234); old variants are currently deprecated API and will be removed
in a future release
- remove references to Parameter in helper APIs (changeset 3cdd9d60f7c7,
bug 232); old variants are currently deprecated API and will be removed
in a future release
- New NetDevice APIs: SendFrom, SetPromiscRxCallback,
SupportsPromiscuous. These are pure virtual methods, so they need
to be implemented by NetDevice subclasses;
In order to support the learning bridge, some API changes in Node and
NetDevice were made.
In NetDevice, devices may optionally implement the virtual methods
SendFrom, SupportsPromiscuous, and SetPromiscReceiveCallback. If
these new methods are not implemented, the code still compiles and
works, except if they are used in a BridgeNetDevice.
In Node, the signature for protocol handler callbacks (used in
AddProtocolHandler) has changed. Now it looks like:
void ReceiveFromDevice (Ptr<NetDevice> device, Ptr<Packet> packet,
uint16_t protocol, Address const &source, Address const &destination,
PacketType packetType);
The extra parameters 'destination' and 'packetType' are present for
all protocol handlers, but only have valid values for promiscuous
protocol handlers. Protocol handlers are non-promiscuous by default,
so no action is needed to adapt existing code besides updating the
callback signature.
Availability
------------
This release is immediately available from:
http://www.nsnam.org/releases/ns-3.2.tar.bz2
What is ns-3 ?
--------------
ns-3 is a new discrete-event network simulator designed for supporting network
research and education. ns-3 features a solid, well documented C++ core and
models for TCP/IP (IPv4), several link types including WiFi, and mobility
models.
ns-3 is an open source project released under the GNU GPLv2 license which
allows anyone to use ns-3 without having to pay any license fee or royalties.
ns-3 is actively seeking new contributors to extend the range of supported
models and/or to maintain existing models.
New user-visible features
-------------------------
a) Learning bridge (IEEE 802.1D)
It is now possible to bridge together multiple layer 2 devices to
create larger layer 2 networks. The Wifi and Csma models support
this new mode of operation. (contributed by Gustavo Carneiro)
b) Python bindings
It is now possible to write simulation scripts in python using our
python bindings (contributed by Gustavo Carneiro).
c) Real-time simulator
It is now possible to run simulations synchronized on the real-world
wall-clock time (contributed by Craig Dowell).
d) Network Simulation Craddle
It is now possible to use the Network Simulation Craddle
(http://www.wand.net.nz/~stj2/nsc/) in ns-3 and run simulations
using various versions of kernel TCP network stacks. (contributed
by Florian Westphal as part of his Google Summer of Code work)
e) A statistics framework
Joseph Kopena contributed a statistics framework which can be used
keep track of simulation data in persistent storage across multiple
runs (database and ascii file backends are available).
More information on the wiki:
http://www.nsnam.org/wiki/index.php/Statistical_Framework_for_Network_Simulation
Where to get more information about ns-3
----------------------------------------
All the ns-3 documentation, is accessible from the ns-3 website:
http://www.nsnam.org
Including, tutorials:
http://www.nsnam.org/tutorials.html
Supported platforms
-------------------
ns-3 is regularly tested on the following platforms:
- linux x86 gcc 4.2, 4.1, and, 3.4.6.
- linux x86_64 gcc 4.1.3, 4.2.1, 3.4.6
- MacOS X ppc and x86
- cygwin gcc 3.4.4 (debug only)
Known issues
------------
ns-3 is known to fail on the following platforms:
- gcc 3.3 and earlier
- optimized builds on gcc 3.4.4 and 3.4.5
- optimized builds on linux x86 gcc 4.0.x
The IPv4 API defined in src/node/ipv4.h is expected to undergo major changes
in preparation of the merge of the IPv6 API and implementation.
API changes for this release are documented in CHANGES.html
Future releases
---------------
Our next release, which is expected to happen in 2 to 4 months from now, will
feature the merging of some of our projects currently in development: IPv6,
emulation, and synchronous posix sockets.
Release 3.1 (2008/06/30)
========================
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