Encoding and decoding of the following GSUP messages were added to support inter-MSC handover functionality:
* E Prepare Handover Request/Result/Error
* E Prepare Subsequent Handover Request/Result/Error
* E Send End Signal Request/Result/Error
* E Forward Access Signalling Request
* E Process Access Signalling Request
* E Close, E Abort, E Routing Error.
Tests for GSUP E Interface messages were added from libosmocore library.
A number of bugs were found in the initial implementation and fixed during the first real tests and after the tests from libosmocom library were added to the code.
This IE was introduced together with inter-MSC handover implementation.
Message Class IE is mandatory for Inter-MSC GSUP messages and optional for Subscriber Management, SS and SMS messages.
Andrey Velikiy