10 is the latest approved patch-set.
No files were changed between the latest approved patch-set and the submitted one.


iu_client: add a new event NEW_AREA

When the IU client learns a new LAC/RAC or
the LAC/RAC has moved from one RNC to another RNC,
inform the user via an event.

Allows the SGSN to track RACs which uses Iu.

Change-Id: I8b1b8c58bf72b00e2705ca87a89a91481bac3470
---
M TODO-RELEASE
M include/osmocom/ranap/iu_client.h
M src/iu_client.c
3 files changed, 39 insertions(+), 2 deletions(-)

diff --git a/TODO-RELEASE b/TODO-RELEASE
index ac52f44..b583f7e 100644
--- a/TODO-RELEASE
+++ b/TODO-RELEASE
@@ -10,3 +10,4 @@
 libosmo-ranap add API         ranap_ran_rx_co_decode2()
 libosmo-ranap deprecate API   ranap_ran_rx_co_decode()
 libosmo-ranap	add API			iu_client.h: add ranap_iu_page_cs2/ranap_iu_page_ps2
+libosmo-ranap	new event		RANAP_IU_EVENT_NEW_AREA
diff --git a/include/osmocom/ranap/iu_client.h b/include/osmocom/ranap/iu_client.h
index 86ae874..465a17d 100644
--- a/include/osmocom/ranap/iu_client.h
+++ b/include/osmocom/ranap/iu_client.h
@@ -38,11 +38,26 @@
 	struct osmo_timer_list release_timeout;
 };
 
+enum ranap_iu_event_new_area_type {
+	RANAP_IU_NEW_LAC,
+	RANAP_IU_NEW_RAC,
+};
+
+struct ranap_iu_event_new_area {
+	const struct osmo_rnc_id *rnc_id;
+	enum ranap_iu_event_new_area_type cell_type;
+	union {
+		const struct osmo_location_area_id *lai;
+		const struct osmo_routing_area_id *rai;
+	} u;
+};
+
 enum ranap_iu_event_type {
 	RANAP_IU_EVENT_RAB_ASSIGN,
 	RANAP_IU_EVENT_SECURITY_MODE_COMPLETE,
 	RANAP_IU_EVENT_IU_RELEASE, /* An actual Iu Release message was received */
 	RANAP_IU_EVENT_LINK_INVALIDATED, /* A SUA link was lost or closed down */
+	RANAP_IU_EVENT_NEW_AREA, /* Either a new LAC/RAC has been detected */
 };
 
 extern const struct value_string ranap_iu_event_type_names[];
diff --git a/src/iu_client.c b/src/iu_client.c
index ce3030e..90fd1dc 100644
--- a/src/iu_client.c
+++ b/src/iu_client.c
@@ -116,6 +116,7 @@
 	OSMO_VALUE_STRING(RANAP_IU_EVENT_SECURITY_MODE_COMPLETE),
 	OSMO_VALUE_STRING(RANAP_IU_EVENT_IU_RELEASE),
 	OSMO_VALUE_STRING(RANAP_IU_EVENT_LINK_INVALIDATED),
+	OSMO_VALUE_STRING(RANAP_IU_EVENT_NEW_AREA),
 	{ 0, NULL }
 };
 
@@ -126,7 +127,7 @@
 	if (!global_iu_event_cb)
 		return 0;
 
-	if (!ue_ctx->notification)
+	if (ue_ctx && !ue_ctx->notification)
 		return 0;
 
 	LOGPIU(LOGL_DEBUG, "Submit Iu event to upper layer: %s\n", ranap_iu_event_type_str(type));
@@ -134,6 +135,25 @@
 	return global_iu_event_cb(ue_ctx, type, data);
 }
 
+static void global_iu_event_new_area(const struct osmo_rnc_id *rnc_id, const struct osmo_routing_area_id *rai)
+{
+	struct ranap_iu_event_new_area new_area = (struct ranap_iu_event_new_area) {
+	    .rnc_id = rnc_id,
+	    .cell_type = RANAP_IU_NEW_RAC
+	};
+
+	if (rai->rac == OSMO_RESERVED_RAC) {
+		new_area.cell_type = RANAP_IU_NEW_LAC;
+		new_area.u.lai = &rai->lac;
+	} else {
+		new_area.cell_type = RANAP_IU_NEW_RAC;
+		new_area.u.rai = rai;
+	}
+
+	global_iu_event(NULL, RANAP_IU_EVENT_NEW_AREA, &new_area);
+}
+
+
 static void ue_conn_ctx_release_timeout_cb(void *ctx_)
 {
 	struct ranap_ue_conn_ctx *ctx = (struct ranap_ue_conn_ctx *)ctx_;
@@ -330,12 +350,14 @@
 
 		llist_del(&lre->entry);
 		llist_add(&lre->entry, &rnc->lac_rac_list);
+		global_iu_event_new_area(rnc_id, rai);
 	} else if (!old_rnc) {
 		/* LAC, RAC not recorded yet */
 		LOGPIU(LOGL_NOTICE, "RNC %s: new LAC/RAC %s\n", osmo_rnc_id_name(rnc_id), osmo_rai_name2(rai));
 		lre = talloc_zero(rnc, struct iu_lac_rac_entry);
 		lre->rai = *rai;
 		llist_add(&lre->entry, &rnc->lac_rac_list);
+		global_iu_event_new_area(rnc_id, rai);
 	}
 	/* else, LAC,RAC already recorded with the current RNC. */
 
@@ -959,7 +981,6 @@
 	return paged;
 }
 
-
 /***********************************************************************
  *
  ***********************************************************************/

