The following diagram shows the directory tree structure that comprises the add-on:

   nas_dev
   |
   +- custsrc
   +- doc
   |
   +- debug
   |  +- build
   |  +- lib
   |
   +- release
   |  +- build
   |  +- lib
   |
   +- src
   +- src2
   +- test_ts24008_ies
   +- test_ts24008_msgs
   +- test_ts24301_msgs
   +- test_ts24501_msgs
   +- test_ts44018_ies
   +- test_ts44018_msgs
   +- util   

This is installed under the 'c' subdirectory of the ASN1C installation.

In addition, 3GPP NAS and RRC ASN.1 and CSN.1 specifications are added to the specs subdirectory in folder 3GPP-NAS.