 | 1 | initial version |
The protocol specifications are available from the IEC, but unfortunately are not free. You'll also need other documents from the set, e.g. -5-2, -5-5, -5-101 as certain aspects are defined there.
The Wireshark dissector could be used to work out the protocol but it isn't "official" so may have errors and omissions.
Note that the github repo you reference is a forked and seriously out of date version of the Wireshark source tree. The official repository can be found here: https://code.wireshark.org/review/gitweb?p=wireshark.git;a=tree
