[ns] HELP : Multicast trace file format

[Vijayan Ramakrishnan <vramakri@cs.uiowa.edu>]

Hi all

  I need help in determining the trace file for multicast traffic.
  I couldn't figure out few fields, especially the ones after  "----".
  I would appreciate if someone explain the field marked "??"
 
=================================================================
packet_Event time   src dest agent ?? ------- ??  ??  ??   ?? ??
-           0.5575   0   3  encap 230 -------  0 0.4 3.0   -1 8
r           0.561227 0   2  encap 230 -------  0 0.3 2.0   -1 1
+           0.561227 2   1  cbr   210 -------  0 0.1 128.0  0 0
=================================================================

  Thanks in advance !!!!

 - vijayn