Fix #84 Wrong MCC+MNC encoding

[linouxis9]

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

• I have read the CONTRIBUTING document.
• Each of my commits messages include Signed-off-by: Author Name <[email protected]> to accept the DCO.

[linouxis9]

Hi @rjaksa,

Your bug should be fixed by this PR. Can you try PacketRusher again with this fix / using branch fixmnc.

Thanks a lot,
Valentin

[rjaksa]

The code change works for the gNB. But there is an informative printf regarding the PLMNs Identities supported by AMF that shows the MNC incorrectly. It lists the 3-digit MNC with the digits in encoded order, instead of the "human readable" format. E.g. MNC 123 is printed as "231".

E.g. for MCC=987, MNC=123, the printf looks like:

INFO[0000] [GNB][AMF] PLMNs Identities Supported by AMF -- mcc: 987 mnc:231

[linouxis9]

Thank you @rjaksa, it's fixed!