On Fri, Apr 17, 2020 at 11:12:41AM +0000, Reza Hosseini wrote:

Dear Mr. Welte,

In order to be more familiar with the further development of the osmo-euse file, I need to know which libraries and which programming style I should use to be on the right track.

Is it possible to provide me please the some lines of your code which is sending the USSD code via the GSUP client to hlr and called up data from OSMO-HLR?

I need this for my master's thesis (Education Purpose), so I don't need a license for it.

It may seem complex and confusing at first, but all the code is available, and open for use, you just need to find your way through it :)

So far we are handling USSD in osmo-hlr itself, see for example osmo-hlr/src/hlr_ussd.c: handle_ussd_own_imsi() and handle_ussd_own_msisdn(). Grep for those to find out how they integrate.

Handling USSD outside of the HLR is a relatively new concept which has not seen actual productive use yet, so there may be rough edges. The euse-demo you mentioned earlier should be such an example.

~N