Prepare entry/exit point for MSC -> BSC and MSC -> RNC communication.

Add msc_ifaces.[hc], a_iface.c, with a general msc_tx_dtap() to redirect to
different interfaces depending on the actual subscriber connection.

While iu_tx() is going to be functional fairly soon, the a_tx() is going to be
just a dummy for some time (see comment).

Add via_iface marker to gsm_subscriber_connection with enum values IFACE_A and
IFACE_IU so far.

Add Iu specific fields in a sub-struct: the UE connection pointer and an
indicator for the Integrity Protection status on Iu (to be fully implemented in
later commits).

Add lac member to gsm_subscriber_connection, to allow decoupling from
bts->location_area_code. The conn->lac will actually be set in iu.c in an
upcoming commit ("add iucs.[hc]").

Change-Id: Idf8020a30562426e8f939706bf5c2188d5a09798

0 files changed, 0 insertions, 0 deletions