pkt_dump.c:
  reads raw packet files and key files, and writes encrypted files.

pkt_dump.sh:
  shell wrapper for pkt_dump, to capture its output and return value
  in a log file.

list.c, list.h, btree.c, btree.h, hash.c, hash.h, cache.c, cache.h:
  The opern header mode requires that two data structures be maintained,
  one which kept track of the mapping of real to substituted IP
  addresses, and one which keeps track of all the conversations that had
  occurred in that segment.  This was at various times implemented using
  a list, a btree, and a hash.  The cache.c and cache.h files provide a
  common interface to the three implementations.

sample.c, sample.h, packet.h:
  prints statistics about packets for debugging.

print.h:
  contains PRINT macro used to print debugging information, which by
  default does nothing.

la.csh:
  logs system activity for debugging purposes.

tests/:
  tests for pkt_dump and decrypt, used for debugging and testing.

find_ip.c, find_ip.h:
  currently unused; please ignore.

