Q: How do I generate the SCTP debug files? I tried using the debugMask_
   and debugFileIndex_ TCL variables, but they still are not generated.

A: As mentioned in sctp.README, ns must be compiled with the -DDEBUG
   flag. The Makefile is the crucial one to fix, but the Makefile is
   automatically generated from Makefile.in using configure. If you never
   need to run configure again, then changing the Makefile alone is good
   enough.  However, if you want the debug to continue to work after
   configure, then you should fix the Makefile.in. Assuming that you
   modified Makefile.in, you need to do the following:

   1. ./configure    (this automatically generates Makefile)
   2. rm sctp.o      (be sure to recompile sctp module binary)
   3. make