First, thank you for helping to improve NextEPC.

Of course, I also do not have a pcap file related to CSFB. However, I've re-designed the socket library so that you can easily implement this function.

In the new socket library, you only need to create sgsap-path.c. The common part of the remaining SCTP is handled by ogs-sctp.c.

Please let me know if you want to access github directly. Of course, you can use the pull-request method. Use the convenient method.

Please feel free to contact me if you have any questions.

Thanks a lot!