USSD: save MO USSD's originating MSC's vlr_number
Save the source IPA name in ss_session, so we can send "invalid IMSI"
messages to the originating MSC.
Remove the fixed size from ss->vlr_number (we don't know the size of the
IPA name when it does not come from the database). Add
ss->vlr_number_len to give osmo_gsup_addr_send() the format it expects,
and to have one less place in the code where the IPA names are not
stored as blob.
Looking up the IPA name from struct osmo_gsup_conn could either be done
like in osmo_gsup_server_ccm_cb() by reading the IPA IEs (which has a
FIXME comment), or by finding the route associated with conn. I went
with the latter approach, because it seems cleaner to me.
Related: OS#3710
Change-Id: If5a65f471672949192061c5fe396603611123bc1
3 files changed