tree 22aaf164697e55bd4b7a62f83e86c1b7904ca93a
parent b1634db0b32fedd8088c3f69602b74bfcf5ef186
author Supreeth Herle <herlesupreeth@gmail.com> 1584961173 +0100
committer Supreeth Herle <herlesupreeth@gmail.com> 1592913261 +0200

utils.py: Add helper method to encode ePDG Identifier

This method encodes ePDG Id so it can be stored to EF.ePDGId or EF.ePDGIdEm.
See 3GPP TS 31.102 version 13.4.0 Release 13, section 4.2.102 and 4.2.104.

Resulting hex string is made of tag value + length + address type + address.
tag value for home ePDG identifier is 80
address type: 0x00 (FQDN), 0x01 (IPv4), 0x02 (IPv6), other (Reserved)

ePDG FQDN example: epdg.mnc001.mcc001.3gppnetwork.org

Note: Only FQDN format is supported for now

Change-Id: I864bda5505e9061391a727add294a6e90c50f9ef