ns: Change History

First cut at adding code for "tcp-sack1" and "sack1-tcp-sink", from Matt Mathis (mathis@zippy.psc.edu) and Jamshid Mahdavi (mahdavi@psc.edu).
Changed format of window and RTT reports sent from tcp.cc to the trace file.
Added "maxpkts" for ftp and telnet sources.

Finished port of TCP with selective acks, along with SACK acceptance tests in "test-sack".
Added a modified version of Reno TCP, tcp-newreno.cc, for research purposes.
Have not yet added tcp-sack or tcp-newreno to the man page.

Finished port of cbq code from tcpsim (with contributions from Michael Speer), and added cbq simulator tests.
Added unique ID to each event in scheduler queue and added hook to lookup an event by using this ID.
Added hook for deleting at callbacks.
Fixed bugs in multicast delivery where agent could modify routing desstructors during the callback.
First cut at port of TCP with selective acks.

Added loss-monitor agent, which is the same as a null-sink but calls a tcl proc whenever there is a gap in the received sequence space. Will expand functionality as necessary for MMG experiments.
Integrated more mature tcl/c++ architecture from vic/vat. This has a major impact on the way ns objects are created and deleted, but we maintain backward compatibility with previous versions. The "ns" command is no longer implemented in C++, but rather as a library function (in ns_default.tcl) that provides glue between the old commands and the new "new/delete" interface.
First cut at port of cbq code from tcpsim.

Added "flush" method to trace objects so that output can be flushed before exiting.
Added link-level src/dst fields to Packet class so node can tell which "interface" a packet arrived on.
Added support for dense-mode PIM style flooding with prune/graft machinery.

Fixed test-suite.tcl so that old awk works. Problem reported by Kannan Varadhan.
Fixed Makefile.in to use V_LIB_TCL, as intended. Fix supplied by Kannan Varadhan.

Fixed more for-stmt scope bugs.
Fixed compilation problems with Sun and DEC compilers. Problem reported by Thierry Turletti.

Fixed bug in xgraph output: new version of xgraph doesn't understand FileorDev because it now uses the PRINTER environment variable. Bug fix from Matt Mathis (mathis@psc.edu).
Added a 'test-all' sh script to distribution, which runs whole suite of regression tests and compares them against a reference output. Thanks to Matt Mathis (mathis@psc.edu).
Don't include tk.h from Tcl.cc.

Changed all references to random() to use Random class so we can easily change our pseudo-random number generator.
Added convention to object names so we can derive their type from their name.
Changed nodes to be first class objects like rest of objects.
Changed trace syntax to use tcl files rather than it's own open/close. For example,
- set f1 [open out.hop w]
- $trace attach $f1
Changed '-' and 'd' trace records to have same format as '+' and 'h' trace records.
Incoporate vic's "matcher" abstraction into agent and link models.
Major hacking to port tcpsim to tcl framework.