msc: Add and use gsm_subscriber_group
Currently every subcriber object directly refers to the gsm_network
which contains a flag shared by every related subscriber
(keep_subscr). This adds a dependency on gsm_network even if only the
function defined in gsm_subscriber_base.c are used.
This patch adds a new struct gsm_subscriber_group which contains the
keep_subscr flag and a back reference to the network object. The
latter is not dereferenced in gsm_subscriber_base.c, so it can safely
be set to NULL when only that part of the gsm_subscriber API is being
used. It also changes that API to use gsm_subscriber_group instead of
gsm_network parameters.
Since there are some places where a pointer to the gsm_network is
needed but where only a gsm_subscriber is available, a 'net' back
pointer is added to the group struct, too. Nevertheless subscr group
and network could be separated completely, but this is not the topic
of this commit.
Sponsored-by: On-Waves ehf
diff --git a/openbsc/src/libbsc/chan_alloc.c b/openbsc/src/libbsc/chan_alloc.c
index f6eb5af..cd96c1b 100644
--- a/openbsc/src/libbsc/chan_alloc.c
+++ b/openbsc/src/libbsc/chan_alloc.c
@@ -436,7 +436,7 @@
struct gsm_subscriber_connection *connection_for_subscr(struct gsm_subscriber *subscr)
{
struct gsm_bts *bts;
- struct gsm_network *net = subscr->net;
+ struct gsm_network *net = subscr->group->net;
struct gsm_lchan *lchan;
llist_for_each_entry(bts, &net->bts_list, list) {