add struct bsc_subscr, separating libbsc from gsm_subscriber

In a future commit, gsm_subscriber will be replaced by vlr_subscr, and it will
not make sense to use vlr_subscr in libbsc. Thus we need a dedicated BSC
subscriber: struct bsc_subscr.

Add rf_policy arg to bsc_grace_paging_request() because the bsc_subscr will no
longer have a backpointer to gsm_network (used to be via subscr->group).

Create a separate logging filter for the new BSC subscriber. The implementation
of adjusting the filter context is added in libbsc to not introduce
bsc_subscr_get/_put() dependencies to libcommon.

During Paging Response, fetch a bsc_subscr from the mobile identity, like we do
for the gsm_subscriber. It looks like a duplication now, but will make sense
for the VLR as well as for future MSC split patches.

Naming: it was requested to not name the new struct bsc_sub, because 'sub' is
too ambiguous. At the same time it would be fine to have 'bsc_sub_' as function
prefix. Instead of struct bsc_subscriber and bsc_sub_ prefix, I decided to
match both up as struct bsc_subscr and bsc_subscr_ function prefix. It's fast
to type, relatively short, unambiguous, and the naming is consistent.

Add bsc_subscr unit test.

Related: OS#1592, OS#1594
Change-Id: Ia61cc00e8bb186b976939a4fc8f7cf9ce6aa3d8e

1 files changed, 10 insertions, 4 deletions

diff --git a/openbsc/src/libmsc/vty_interface_layer3.c b/openbsc/src/libmsc/vty_interface_layer3.c
index cd5dfb723..1bc9372a6 100644
--- a/openbsc/src/libmsc/vty_interface_layer3.c
+++ b/openbsc/src/libmsc/vty_interface_layer3.c
@@ -34,6 +34,7 @@
 #include <osmocom/core/linuxlist.h>
 #include <openbsc/gsm_data.h>
 #include <openbsc/gsm_subscriber.h>
+#include <openbsc/bsc_subscriber.h>
 #include <openbsc/silent_call.h>
 #include <openbsc/gsm_04_11.h>
 #include <osmocom/abis/e1_input.h>
@@ -1034,21 +1035,26 @@ DEFUN(logging_fltr_imsi,
 	LOGGING_STR FILTER_STR
       "Filter log messages by IMSI\n" "IMSI to be used as filter\n")
 {
-	struct gsm_subscriber *subscr;
+	struct gsm_subscriber *vlr_subscr;
+	struct bsc_subscr *bsc_subscr;
 	struct gsm_network *gsmnet = gsmnet_from_vty(vty);
 	struct log_target *tgt = osmo_log_vty2tgt(vty);
+	const char *imsi = argv[0];
 
 	if (!tgt)
 		return CMD_WARNING;
 
-	subscr = subscr_get_by_imsi(gsmnet->subscr_group, argv[0]);
-	if (!subscr) {
+	vlr_subscr = subscr_get_by_imsi(gsmnet->subscr_group, imsi);
+	bsc_subscr = bsc_subscr_find_by_imsi(gsmnet->bsc_subscribers, imsi);
+
+	if (!vlr_subscr && !bsc_subscr) {
 		vty_out(vty, "%%no subscriber with IMSI(%s)%s",
 			argv[0], VTY_NEWLINE);
 		return CMD_WARNING;
 	}
 
-	log_set_imsi_filter(tgt, subscr);
+	log_set_filter_vlr_subscr(tgt, vlr_subscr);
+	log_set_filter_bsc_subscr(tgt, bsc_subscr);
 	return CMD_SUCCESS;
 }