User:Rajb245

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.

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
  • Circulate said fixes for consideration
  • Decide a date for release
  • Learn more about release process (tarballs, release tagging, etc.)

• Server Migration
  • Debugged the code mailhook, appears to be working on our end, we think it is a firewall issue, computer support has been mailed about a possible firewall issue
  • error with hg-ssh file is preventing check ins to the new ns-3-dev
  • Web migration requires some small downtime to reset sql passwords
  • dump/backup the sql databases, migrate and import them on the new server

• 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