Change History (nam)
nam-1.11 Release pending
- [haldar]Mon Jan 24 12:04:47 PST 2005
Added changes from mac802.15.4 contributed code from Jianliang Zheng
(zheng@ee.ccny.cuny.edu) and Myung J. Lee (lee@ccny.cuny.edu).
Also updated the otcl and tclcl version numbers in files under conf and
VERSION to match newer versions.
nam-1.10 Release
Fri Jan 9 15:25:03 PST 2004
[Xuan Chen]
Sat Oct 11 23:08:29 PDT 2003
- removed the hard-coded tcl/tk library path in main.cc and
tkUnixInit.c
- Added support for building nam under tcl/tk8.4.4 and new otcl/tclcl
(commited in cvs, release pending).
In tkcompat.h, defined two new macros: CONST84 and
CONST84_RETURN for old tcl/tk versions (before 8.4).
NOTE: need to change configure at next release so that tcl/tk
8.4.4 will become default.
nam-1.0a12[OLD VERSION NO].nam1.9[NEW VERSION NO] released
Feb 23, 2003
[Tim Buchheim]Mon Feb 10 14:17:40 PST 2003
More updates for wireless animations:
- wireless broadcast packets now use "r" events when animating in reverse, just like non-broadcast packets. (previously they used the "h" event even when going backwards)
- wireless and wired nodes can now be mixed with better results. This requires using the "W" event as well as supplying X and Y coordinates for all nodes in the scenario.
- The range and duration of the animation of wireless packets can now be specified on either a per-packet basis or by setting global parameters.
[Tim Buchheim]Tue Dec 10 19:02:19 PST 2002
Two changes to the animation of broadcast packets in wireless scenarios:
- bcast packets used to be animate in real time, not virtual time. so
if you changed the playback speed (or even paused it) the circles would
always expand at the same real rate. Now, the animation is done in
virtual time, like all other objects. So if you slow down the playback
rate, the circles will move slower. If you increase playback rate, they
move faster.
you can now set the speed for broadcast packets. (previously they
ran at a hardcoded speed.) Use something like the following:
v -t 0.0 -e set_bcast_duration 0.02
The default is currently set to 0.01 (units are seconds)
-
[mehringe] Fri July 6 2001
- Added Loss Models and Queue Types to the nam editor.
- Added Exponential, Pareto, and Telnet traffic sources.
-
[mehringe] Wed May 9 2001
More nam editor updates, it is staring to look nice now.
- Moved object properties to a popup window instead of a side pane.
- Fixed save and save as dialog boxes and removed unecessary
use of a temp file.
- Fixed the color popup window to place the color value
in the proper text box when double click upon.
- Removed the unused stop, fast-forward, play, reverse buttons.
- Disabled the edit menu commands until those are finished.
-
[mehringe] Fri Mar 23 2001
I added saving and opening of nam editor ns scripts, added modification of different object properties, and added the time slider for setting start and stop times for traffic sources
-
[mehringe] Wed Feb 7 17:20:15 PST 2001
Major updates to the nam editor. Currently it only has a small subset of the total functionality but basic scripts can be created and run. More things will be filled in over the next couple of months.
-
[mehringe] Thu Dec 14 16:45:48 PST 2000
Rewrote parsing code to be table driven and more stable. Cleaned up nam trace file syntax
to remove trace event language ambiguities but tried to keep backwards compatibility.
Added files parser.h and parser.cc.
-
[johnh] Tue Dec 12 10:36:34 PST 2000
Updated config.guess to autoconf's current one.
-
[difa] Fri Dec 08 17:32:34 PST 2000
Modify nam_stream.cc so that nam can use non-blocking I/O to handle pipe input.
- [johnh]Fri Oct 6 20:28:20 PDT 2000
Another few compile problems for redhat 7.0/gcc 2.96.
- [mehringe]Fri Oct 6 07:59:55 PDT 2000
Nam now allows you to dynamically add nodes and links. You still have to define the node but you can do it at any time during the simulation. Before all nodes and link had to be defined at -t *.
- [johnh]Thu Aug 10 15:15:55 PDT 2000
Nam now builds on redhat linux 7.0 with gcc 2.96 (and with
other compilers than allow ANSI's xor keyword).
- [hyunah]
Thu May 18 11:12:20 CDT 2000
Added nam option and ns commands for nam validation test.
- nam -z : to play nam as soon as it starts
- $ns snapshot : to take a snapshot
- $ns rewind-nam : to play back
- $ns re-rewind-nam : to play forward after play back
- $ns terminate-nam : to exit nam
- [hyunah]
Sun Apr 9 8:18:54 PDT 2000
nam validation test was added.
- [haoboy]
Mon Apr 3 15:28:44 PDT 2000
Fixed bug in wireless trace. Basically NetModel::layout_node{} did
not pass parameters in the correct order. Now dlabel becomes the
last parameter and it should work for all cases.
- [haoboy]
Thu Mar 23 19:38:29 PST 2000
- Currently autolayout does not work due to some mysterious reasons as
I explain below.
Everything happened between Feb 27 and March 1st,
2000. Specifically, it's due to changes in netmodel.cc v1.74 to
v1.75, and tcl/netModel.cc v1.10 and v1.11.
If the lines 174-178 in tcl/netModel.tcl does not contain $dlabel
stuff, auto layout works fine. But when they are added, it's messed
up even if the dlabel processing code in netmodel.cc is never called
due to the default empty dlabel string. I suspected it was a memory
problem but purify did not give anything.
Therefore, I changed those lines in tcl/netModel.tcl to only add the
$dlabel arguments when it's not empty. Thus done, auto layout now
works for existing trace files. However, I still don't understand
why it behaves this way. It smells suspicious of something wrong
somewhere else, and it must be fixed before new code should be
added.
- Fixed the route entry stuff; now it works when node zooms or
auto layout.
- Fixed indentation in various places to the default 8.
- Changed three class member variables to carry the underscore
suffix so they conforms to coding convention and it's easy to
distinguish between class member variables and other auto
variables.
- [hyunah]
Sun Mar 19 21:24:08 PST 2000
* removing duplicate code (draw stuff for PSView). Using View instead.
* nam editor
- adding "runNs" command so that users don't need to type "ns xxx.nam" explicitly
- [hyunah]
Tue Feb 29 15:41:27 PST 2000
* nam editor
- add agent information of reloading function
- [hyunah]
Tue Feb 15 17:45:38 CST 2000
* nam + nam editor
- adding icon explaining box
- [kclan]
Mon Feb 14 20:23:31 PST 2000
adding interactive control for coloring packet flow on the fly
- [hyunah]
Thu Feb 10 15:36:56 PST 2000
* nam editor
- adding Application option to AgentProperty such as starting/ending
time
- [hyunah]
Wed Feb 9 15:57:20 PST 2000
* nam editor
- modifying "link" for backward-compatibility.
(making link either by click-&-drag or click-&-click)
- adding tcl script for FullTcp destination agent
- [hyunah]
Tue Feb 8 19:46:04 PST 2000
* nam editor
- adding AgentProperty to support Agent Options such as
windowInit_, cwnd_ in TCP and packetSize_ in CBR.
- [kclan]
Mon Feb 07 12:23:31 PST 2000
adding interactive control to filter packet on the fly
- [hyunah]
Mon Feb 7 14:43:43 PST 2000
* nam editor
- adding click_and_draggable link between nodes, and between
agents
- adding CBR connection
- adding fid (0~4) to provide different color per flow
- fixing bug to have consistent view between editor and normal nam
window
- supporting multiple TCP conenctions
- inserting "open" command
- fixing bugs related to "cut" function, node numbering, and
attaching agent on nodes.
- [hyunah]
Thu Jan 27 14:53:52 PST 2000
Adding graphical interface on attaching agent in nam editor
- [kclan]
Tue Jan 25 19:06:18 PST 2000
Fix bugs in using hierarchical routing for wireless(using
node id instread of node address for animation)
- [hyunah]
Tue Jan 25 17:56:58 PST 2000
Modifying an outline of nam editor
- [hyunah]
Mon Jan 24 19:35:34 PST 2000
Modifying nam editor view to accommodate the new function, which is replacing
editview entry with toolbar.
- [hyunah]
Tue Jan 18 19:51:06 PST 2000
Added agents to nam editor
(works for one pair of TCP and TCPSink agents)
- [haoboy]
Wed Dec 22 14:33:05 PST 1999
Added node size scale up/down buttons in the zoom bar.
- [haoboy]
Mon Dec 13 16:21:21 PST 1999
Replace the edit view menu entry with a toolbar button so that
topology editing can be turned on at any time without opening a new
view.
- [haoboy]
Thu Dec 9 14:38:02 PST 1999
Fix the node (inner) label color so that it can be set to background color.
Basically add new color parameter to Paint::text_gc() so we can allocate
a font GC with a specific color.
Remaining Problem: PSView still cannot handle this node label
color correctly.
- [haoboy]
Fri Dec 3 10:23:18 PST 1999
Added support for large flow id and color ids.
- [kunchan]
Thu Nov 16 17:00:37 PDT 1999
Adding mechanism for visualization of packet flow in wireless simulation.
- [hyunah]
Fri Oct 29 19:20:03 PDT 1999
Several features of labels both on node and edge are added such as
color and position.
The examples of new commands are following
$ns at 0.0 "$n(0) label-color yellow"
$ns at 0.0 "$n(0) label-at NORTH"
$ns at 0.0 "$ns duplex-link-op $n(0) $n(1) label cost=1"
$ns at 0.0 "$ns duplex-link-op $n(0) $n(1) color green"
$ns at 0.0 "$ns duplex-link-op $n(0) $n(1) label-at WEST"
- [haoboy]
Thu Jun 17 17:02:37 PDT 1999
Changed ns-developers in www.tcl to ns-users.
- [haoboy]
Thu Apr 15 11:14:20 PDT 1999
Re-instated options '-j' and '-r' to control the startup time and
animation rate.
- [haoboy]
Wed Apr 14 13:36:42 PDT 1999
Changed tcldbg library initialization so that it works with tcldbg
1.7 through 1.9.
- [haoboy]
Sat Apr 3 14:43:10 PST 1999
Allow user to provide initialization file for every source
file. However, the initialization that can be done in these files
(i.e., provided by -f or -u options) is limited, because sourcing of
these files is done inside a instproc{}. Currently, it is
recommended that only operations to be included in these
initialization files are to reset class variables; redefinition of
existing OTcl methods in these files does not seem to work.
One example of the initialization file is to define initial
animation rate. This can be done by including the following line
into a file, say, n1.tcl: Animator set INIT_RATE_
2ms. Then run nam like this: nam -u n1.tcl a.nam
- [haoboy]
Mon Mar 29 15:50:01 PST 1999
After "reset" button is pressed, nam should redraw screen to reflect
the changes in layout. Modified files: anetmodel.{cc,h}.
- [haoboy]
Sat Mar 13 15:16:56 PST 1999
Added startup option '-k ' to allow users to
specify the initial port address to search from.
- [salehi]Fri Mar 12
12:40:10 PST 1999
Configured with the new versions of Tcl, TK, OTcl, and TclCl.
- [haoboy]
Wed Mar 10 19:17:59 PST 1999
Fixed WIN32 incompatibilities in nam_stream.{cc,h}. Changed
conf/makefile.win to allow generating debugging version under win32.
Updated source file list in makefile.vc.
- [johnh]Fri Mar 5 15:03:03 PST 1999
Make now complains if you need to run configure.
(Based on Adam Costello's ns fix.)
- [haoboy]Tue Jan 12
12:43:44 PST 1999
-
Removed msgbox.tcl and tkfbox.tcl from tcl/. They belong to tk
distribution and shouldn't be included here. Tclcl was modified to
handle embedded XBM files inside tcl script; msgbox.tcl and
tkfbox.tcl were embedded into tclcl.
- Modified all codes related to timeslider so that if
maxtime==mintime, the timeslider code will still work instead of
producing a coredump.
- [Ya]Fri Dec 11 17:04:52 PST 1998
An Editor is added to nam to allow the user to interactively edit the
simulation
topology in a WYSIWYG style. Current new features include:
- Create simulation topology
- Edit Object's properties in the topology
Node: Color, Size, Label, Agents
Link: Color, Bandwidth, Delay
- Add/Delete node and link object
Export the result to a tcl file (*.nstcl) which can be excuted under ns
- Save as an editable nam file (*.enam)
- [Ya]Thurs Nov 12 17:04:52 PST 1998
Autoconf support for zlib is added.
self-adjusted timeslider works with zlib support.
- [johnh]Fri Nov 6 17:04:52 PST 1998
Nam will now play compressed files (files ending in .Z or .gz,
if nam is built with -DHAVE_ZLIB)
and from pipes (use the filename ``-'').
Autoconf support for zlib is still needed.
Compressed files play very slowly backwards.
Playing from a pipe buffers trace data in a file in /tmp.
Oct 22 17:31 PDT 1998[Ya]
- Preliminary mobility support (under active development)
- Node lable support
- Support for simplex links
- Various bug fixes.
Released with ns-2.1b4 and ns-allinone-2.1b4
Sep 2 17:31 PDT 1998[Ya]
- Namgraph for high-level drill-down analysis
- Nam console with multi-model support
- Layout editor
- LAN visualization support ( Need ns-2.1b4 to create tracefile for the
feature. Ns-2.1b4 is not released yet at this moment )
- Compatible with Tcl/TK 8.0, Win32.
- Some new examples to demonstrate these new features including
nam-1/ex/tcpsrm.nam, tcpecn.nam and lantest.nam.
- Various bug fixes.
- A win32 version is provided in reponse to heavy request from ns-users.
-
[Ya]
Aug 5 15:15 PDT 1998
Ready for new Nam 1.0a5 release
- LAN support
- Namgraph for tcp and srm event graph
- Layout editor
- Multi-model support
-
[Ya]
Apr 22 20:15 PDT 1998
- First cut for nam with analysis views(tcp).
- [haoboy]
Tue Mar 31 09:29:53 PST 1998
- Bug fix for Edge's bounding box. It should have two bounding boxes. One
for calculating screen to world transform, the other to compute Edge::inside().
-
[SM]
Mar 30 20:15 PDT 1997
- Make windows build work again.
- [haoboy]
Thu Feb 26 16:33:59 PST 1998
- Bug fix for Trace::settime(). Previously it falls into infinite loop when
first forward to the end, then backward to the start for the trace file whose
first 'real' events does not start at time 0.
- Bug fix for BoxAgent's bound box. It should have its own update_bb().
- [LB]
Thu Feb 26 16:00:44 PST 1998
Added ability to skip over
quiescent periods in the animation.
- [haoboy]
Tue Feb 24 18:20:52 PST 1998
- Change NetModel::scale_estimate() to use Edge::length() instead of
Edge::delay(). Otherwise it has problem when using a pre-made layout.
- Manage node marks with a linear list instead of Tcl's hash table. The
latter results in random traverse order w.r.t. the input order.
- Add Packet::CheckPoints() to limit the minimum length of packets. Otherwise
some packets may disappear if too small (reported by Kannan).
- [haoboy]Mon Feb 23 18:20:41 PST 1998
Now node marks can have 3 shapes: circle, square and hexagon.
- [haoboy]
First cut of topology editor. Added various reconfigure methods to
all Animation objects. Added selection mechanism to NetModel and
AutoNetModel. The editor only works with auto layout because in fixed
layout all edges are proportional to delay
To use the editor, open an edit view using the menu button "Edit view"
under "Edit". In the new edit view, clicking left button on a node
will select it, then it can be moved by dragging it around. Rubber band
is supported by clicking and dragging the left mouse button. Shift-click
an object will add it to the current selection.
Currently there is a cosmetic bug related to moving a selection around
in the edit view, and many necessary editing features have not been
added yet. Because this editor involves many other files, I decided to
check it in when it's mainly working. Otherwise it'll be very hard to
keep all these changes up-to-date.
- [haoboy]Wed Feb 18 20:48:02 PST 1998
Bug fix: Init nymin_ nymax_ in AutoNetworkModel::placeEverything().
- [johnh]Wed Feb 18 14:26:23 PST 1998
Added drag-scrolling support (mouse-2 in a window lets you drag it around).
- [EA]
Thu Feb 12 20:54:59 PST 1998
- Added reset button to auto-layout.
- Added ex/mbone.nam - a map of the mbone done on 8/6/96.
- [haoboy]
Fri Jan 30 13:36:25 PST 1998
- Focus on the next annotation while using time slider.
- nam_prelayout() and nam_layout() now skip all events which doesn't
have
-t* from the beginning of the trace file.
- Install all Tk options with the real application name as class, so that
peer functions appropriately. Affected: non-www fonts options in
nam.tcl and Tk_GetOption() in paint.cc.
- Initialize
views_ as NULL in netgraph.cc.
- Problem: sim_annotation in nam.tcl cannot handle well multiple
annotations happening at the same time.
Release with ns-2.1b2 Jan 21 1998 [haoboy].
Version 1.0a4 skipped because when 1.0a2 was released the directory name
was mistaken by nam-1.0a3. To avoid the confusion, we skipped 1.0a3.
Release with ns-2.1b2 Jan 21 1998 [haoboy]
- [haoboy]
Wed Jan 21 17:40:37 PST 1998
- Added XWDFile.h because xwd.c doesn't compile with obsolete XWDFile.h
of openwin in some old sunos 4.
- Added link flags into Makefile.in so that it will recognize -static flag.
- [EA]
Wed Jan 21 13:04:38 PST 1998
- Fixed bug in reverse link angle calculation in nam.tcl.
- Removed Tcl_Init from main.cc since this is not needed with TclCl and
it causes nam to break if tcl is not installed.
- [haoboy]Tue Jan 13 15:31:34 PST 1998
- Reinstate the peer functionality for two nam instances. Mainly changing
[winfo name .] to [tk appname] and add new option "-N" to let user specify
specific app name for every instance.
- Add/delete annotations during animation. But they can not be saved into
the trace files. Detailed description included in the man page.
- Include tcl-debug support into main.cc. Changed library order in
Makefile.in so that X libs are included last. Changed
conf/configure.in.tcldebug to include paths for Dbg.h
- [johnh]Tue Dec 16 10:14:30 PST 1997
Man page info for animation saving.
(Also, see build.menus in nam.tcl for a list of desired enhancements.
- [johnh]Mon Dec 15 22:38:15 PST 1997
An animation can now be saved into a series of files (namXXX.xwd)
for post-processing into an mpeg or animated gif.
- [EA]
Fri Nov 28 17:35:02 PST 1997
- Fixed annotation listbox so that current annotation is always displayed
at bottom. Ultimately, we want to highlight this with a "window" that
stays centered on the current annotation. Get to this later.
- [TLT]
Sat Nov 22 14:48:21 GMT-8:00 1997
- [win32] edits to make it compile under win32 again
- edits to remove some warnings
- [win32] [bug fix] reverse scans wasn't working because in windows
the default file mode is text and not binary. They are working now.
- [win32] mods to compile with static tcltk
- [temp bug fix] when views are destroyed offsreen_ are not freed, this
caused subsequent draws onto a non-mapped window. For now, I freed the
offsreen bitmap and set it to zero. The real fix should be to free up
the view entirely.
- [EA]
Sat Nov 22 13:08:58 PST 1997
- Added tkUnixInit.c to override dynamic loading of tk scripts since
we get them from tclcl.
Release with ns-2.1b1
- [EA]
Sat Nov 15 15:54:10 PST 1997
- Ported to tcl8.0. Added tkcompat.h for backward compat.
- Generated new configure script for autodetecting of tcl/tk versions
(John Heidemann's revision).
- [haoboy]
Mon Nov 10 10:14:23 PST 1997
- Fixed bugs in packet.{cc,h} caused by setting edge length != delay.
- Updated scripts in ex/
- Updated nam man page.
- Fixed bugs in monitoring dropped packets
- [johnh]Tue Oct 28 17:00:05 PST 1997
Re-autoconf'ed with configure.in.TclCL.
Extra code from nam.tcl removed.
-
[mjh] Wed Oct 8 1997
- Moved all view zoom and pan code from Tcl to view object to allow us
to have multiple views.
- Fixed all code that assumes only a single view of the netmodel
- Implemented multiple views - currently in a separate window but might change this soon.
-
[mjh] Sun Oct 5 1997
- Added code to display the current time in timeline graphs
- Support for bi-directional and loss timeline graphs added.
- Assorted minor bug fixes
-
[mjh] Sat Oct 4 1997
- Separated netview into a general purpose view and a special purpose.
netview.
- Added new classes to support producing graphs of various parameters.
- Integrated graphs into UI (click on a link to see them).
- Fixed minor bugs in netview zooming and X Event handling.
- Changed tracefile format to be more TCL-like to make it easier to
handle events with text fields or embedded TCL.
[mjh] Thu Oct 2 1997
- activated John's view menu and added code to hide or show the
monitors, annotations and autolayout panels
- [johnh]Wed Oct 1 19:34:40 PDT 1997
Menubar and about dialog added.
-
[haoboy] Wed Oct 1 19:20:53 pdt 1997
Added annotation list box.
-
[mjh] Wed Oct 1 1997
-
fixed incorrect value of M_PI in sincos.h
-
improved placement of agents so they don't overlap lines and don't often
overlap each other if possible.
-
[haoboy] Tue Oct 1 11:14:00
PDT 1997
-
"Return" key is no longer associated with 'single-step'.
-
Use right button to add monitor, instead of left button. Left button will
be used later to move nodes or node groups.
-
Implemented automatic graph layout.
-
Add a control bar to adjust automatic layout parameters.
-
Default configuration file is .nam.tcl in current directory. A sample .nam.tcl
is included as ex/sample.nam.tcl, together with short explainations.
-
Copied config.h, random.{cc,h}, rng.{cc,h} from ns-2.
-
[mjh] Tue Sep 30 1997
-
added zoom functionality to netview (mostly added in tcl, but could easily
be moved to c++ later if we think it necessary)
-
[mjh] Mon Sep 29 1997
-
replaced old time slider with one based on a canvas to make it more obvious
what does what (expecially when we add scrollbars for zooming)
-
[johnh] Tue Sep 16 14:49:30
PDT 1997
ns_to_nam.tcl "h" support improved, examples directory added.
-
[haoboy] Wed Sep 3 19:56:34
pdt 1997
Minor bug fixes. Now nodes can start with different colors and change
color later on.
-
[johnh]Wed Sep 3
Extended nam_angle to support arbitrary angles with ``180deg'' syntax.
Patch from Vikram Visewswariah .
-
[johnh] Fri Aug 15 10:44:22
PDT 1997
Updated configuration code to current ns-2 status (but not merged)
-
[EA] Thu Aug 14
11:15:01 PDT 1997
Added session level annotation.
-
[SM] Thu Aug
14 09:52:14 PDT 1997
-
Removed "gen" directory and contents from repository since these files
are automatically generated.
-
Added Nam.suppressMonitors configuration resource which if set to ``true''
suppresses the display of the monitor subpanel in the user interface (to
save screen real estate when not needed). The user should be able to insert
and remove dynamically this panel from the GUI.
-
Added a hook to source $HOME/.nam.tcl if it exists.
-
Added "yesno" and "resource" helper procs.
-
[SM] Sun Aug
10 15:11:27 PDT 1997
-
First cut at port to win32 API (should work under both Windows 95 and NT).
Seems to work okay except for an infinite loop that occurs fairly often
when manipulating time in the backward direction.
-
Added a number of workarounds for Visual C++. It treats classes and structures
different for example and can produce link errors if a type is referred
to both ways.
-
Cleaned up code in netview.cc to use more Tkisms in place of Xisms. It
previously compiled under windows but didn't work. Tk shielding made it
work.
-
[SM] Spring
1997
-
Somewhere in here Mark Handley added a bunch of nice features and improved
the file format.
-
[SM] Fri Dec
27 1996
-
Ported to our local autoconf environment; we now share configure.in.* files
across all of our research software.
-
[SM] Eliminated
pt.h since wired-in packet types no longer used.
-
[SM] Ported to
MIT's Object Tcl
framework and eliminate CommandTable class etc. Eliminated time_atof
and bw_atof, whose functions are now handled in tcl.
nam-0.5a
[Jacobson] Tue Sep 12 04:41:15 PDT 1995
-
Re-do trace format yet again: all packet related records (h + - d) now
have same format:
time src dst size attr type conv id
where src & dst are the immediate src & dst node names, size is
the size in bytes, attr are drawing attributes (color # in lower 8 bits,
bit 8 set if should be drawn hollow rather than filled), type is a 7 char
'type' string, conv is a 31 character 'conversation' identifier and id
is an integer packet identifier.
-
can now right click on anything (packet, queue item, drop) & get info
about it.
-
added 'ncolor' and 'ecolor' commands to set node & edge colors
-
made 'v' command just execute it's text as a tcl expr as suggested by McCanne.
nam-0.4a
[Orayani] Summer 1995
-
add support for graphing, packet id's, and synchronized animations.
nam-0.3a
[SM] Decemeber
1994
-
Changed trace file input format. New format is identical to format output
by ns.
-
Eliminated pic-style language parses. Now topology and layout are created
by user-defined tcl procedure (nam_config).
-
Reworked layout traversal to operate on native objects instead of temporary
ones.
-
Changed node/edge object interface so that you first create them and later
place and adjust their size.
-
Changed links so that they explicitly know their bandwidth and can map
a packet size into a transmission time (so we don't need trasmission times
in the trace file anymore).
-
Made many improvements to user interface.
Origin
Although development of the LBNL Network Animator nam began in 1991,
it was not widely released for many years because the project was consistently
superceded by a number of our other research/development efforts. Steven
McCanne wrote the original version of the nam in February 1991 during
his year off from school (between undergraduate and graduate degrees) when
he worked full-time as a staff scientist in the Network
Research Group at the Lawrence Berkeley
National Laboratory. This early version of nam was first prototyped
in C using Tango, an environment for algorithm animation from Brown
University. Shortly thereafter, McCanne ported nam to C++ and the Stanford
Interviews graphics library.
Within this C++/Interviews framework, the principal application design
and architecture was experimented with, refined, and developed. In winter
1991, McCanne ported nam to Interviews-3.0, and improved the underlying
design to support multiple views of a single animation. In fall 1993, McCanne
ported nam to Tcl/Tk
and further improved the software architecture and user interface. In winter
1994, McCanne once again re-visited the nam design, this time to improve
its interaction with his network simulator ns
(version 0.3a above). In summer 1995, Marylou Orayani enhanced nam with
a number of features to carry our her U.C. Berkeley Master's project, which
involved the automatic animation of real TCP/IP conversations and detailed
case studies of a number of actual pathological traffic patterns (version
0.4a above). Throughout this time, Van Jacobson contibuted a number of
improvements to the user inteface and trace file format and added new features.
This change history was not consistently maintained until winter 1996,
when we first created the web-page form of this document.
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