Reply to CHECK-IMEI GSUP messages

Decode the IMEI from incoming CHECK-IMEI messages, print the IMEI to
the log and always send ACK back to the VLR/MSC.

In the future, we will not only log the IMEI, but store it in the HLR
(OS#2541). This is not the original intention of CHECK-IMEI from the
3GPP spec, but an useful side effect.

Depends: I085819df0ea7f3bfeb0cabebb5fd1942a23c6155 (libosmocore)
Related: OS#3733
Change-Id: Ib240474b0c3c603ba840cf26babb38a44dfc9364
1 file changed