User:Rajb245

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About Raj

Raj Bhattacharjea is a full time developer of ns-3 in the employ of the Georgia Institute of Technology.

Completed Tasks

July 2008

• tcp-star-server example added
• tcp-errors example checked in. Subsequently removed.
• Cleaned up some TCP doxygen.
• Evensky test case added as a regression test and announced to list. Subsequently removed.
• Make PacketSink multitasking for TCP (closed bug 244)
• Fix TcpSocketImpl rx buffer logic (closed bug 248)

August 2008

• Add two unit TCP unit tests, one for a transfer, one for finite buffers.
• Make TypeId(const char * name) explicit (closed bug 281)
• Use scheduler to call up the stack in SimpleNetDevice (closed bug 287)
• Refactor OnOff so Start doesn't immediate close the socket (closed bug 259)
• Attended SIGCOMM, participated in giving the ns3 demo

September 2008

• Fix TCP closedown FINs (closed bug 242)
• Actually implemented TCP finite rx buffer (closed 239)
• Extensively tested ns-3 in prep for the 3.2 release
  • filed bug 323 waf --valgrind doesn't check for valgrind first
  • filed bug 337 opt build fails in address.cc on Ubuntu 8.10
  • filed bug 343 utils/bench-packets is broken and asserts
  • filed bug 349 packet unit test fails on optimized build
  • filed bug 358 calling listen on non-closed TCP sockets sends resets, sh...
  • filed bug 359 *SocketImpl::Bind returns something other than -1
• Helped Mathieu debug GTNetS TCP port for ns-3-simu use for his demo. End result was deciding that nsc is more mature at this point, but working through the issues identified some bugs, and got me a working simu setup to use for testing purposes.

October 2008

• Debugged the new server code commit mailhook, Tom fixed the exim conf and ns-commits list issues, so now it works.
• Resolved the hg-ssh script issue for code server main repository access control; problem was one of Mercurial python API changes ("import commands" to "import dispatch")

Current Tasks, in rough order of priority

Release Manager tasks for ns-3.2.1

• Identify fixes to be included in ns-3.2.1
  • Build environment issues
    • waf/python-scan Bug 370
  • Bug 371
  • We spoke about increased tests in the release, but I have no clear idea on this
    • gcov lcov stuff
  • Infinite Run loop in simple-alternate-routing [1]
• Circulate said fixes for consideration
• Decide a date for release
• Learn more about release process (tarballs, release tagging, etc.)

Server Migration

• Web migration requires some small downtime to reset sql passwords
• dump/backup the sql databases, migrate and import them on the new server
• verify that all of the doxygen/html/texinfo etc scripts will run on the new machine
  • see email name "nsnam updates and status" sent Sept 12 to Tom and George

Help George prepare ns3 tutorial for WNS2

• Basics of ns3 overall model
  • Nodes
  • Protocol stacks
  • NetDevices
  • Channels
  • Packets
• Interesting Implementation Details
  • Aggregation/GetObject
  • Role of callbacks
• Primer on tracing
• Primer on attributes system
  • Show the gtkconfigstore
• Possible ports of some more GTNetS stuff (Jeffay example, http browsers and servers)
  • http port(s) might not be necessary with simu being able to do microhttpd
• Explain the statistics framework
• Show some potential visualization (nam, Gustavo's python stuff?)

Random Tasks, lower priority

• Cleanup TcpSocketImpl::Recv code (its ugly and inefficient)
• Address bug 250
• Use ns-3-simu to debug TCP
  • process microhttpd<->simulator "native" TCP<->tap net device<->real linux<->real firefox
  • replacing simulator "native" TCP from above with NSC works, but above setup doesn't, indicating bugs
• Help Michelle with random variable API changes