Change in ...osmo-iuh[master]: iu_client: introduce ranap_iu_tx_release_free()

[lynxis lazus]

lynxis lazus has uploaded this change for review. ( https://gerrit.osmocom.org/c/osmo-iuh/+/15473


Change subject: iu_client: introduce ranap_iu_tx_release_free()
......................................................................

iu_client: introduce ranap_iu_tx_release_free()

ranap_iu_tx_release_free is a fire and forget function to release
gracefully if possible. It first sends a Iu Release Command. After
a certain timeout the connection will be release.

Change-Id: I349e2c61ba0131e233b7ab927dfced0bd461dd8f
---
M include/osmocom/ranap/iu_client.h
M src/iu_client.c
2 files changed, 27 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.osmocom.org:29418/osmo-iuh refs/changes/73/15473/1

diff --git a/include/osmocom/ranap/iu_client.h b/include/osmocom/ranap/iu_client.h
index b388529..9da611b 100644
--- a/include/osmocom/ranap/iu_client.h
+++ b/include/osmocom/ranap/iu_client.h
@@ -31,6 +31,8 @@
 	struct gprs_ra_id ra_id;
 	enum ranap_nsap_addr_enc rab_assign_addr_enc;
 	bool notification; /* send notification to the upstream user */
+	/* Will be set when the Iu Release Command has been sent */
+	struct osmo_timer_list release_timeout;
 };
 
 enum ranap_iu_event_type {
@@ -71,6 +73,13 @@
 int ranap_iu_tx_common_id(struct ranap_ue_conn_ctx *ue_ctx, const char *imsi);
 int ranap_iu_tx_release(struct ranap_ue_conn_ctx *ctx, const struct RANAP_Cause *cause);
 
+/* transmit a Iu Release Command and free the ctx afterwards.
+ * If a Release Complete is not received within timeout s,
+ * release the SCCP connection. */
+void ranap_iu_tx_release_free(struct ranap_ue_conn_ctx *ctx,
+			     const struct RANAP_Cause *cause,
+			     int timeout);
+
 /* freeing the UE will release all resources
  * This will close the SCCP connection connected to the UE */
 void ranap_iu_free_ue(struct ranap_ue_conn_ctx *ue_ctx);
diff --git a/src/iu_client.c b/src/iu_client.c
index 38c8a1d..fe1b880 100644
--- a/src/iu_client.c
+++ b/src/iu_client.c
@@ -129,6 +129,9 @@
 	ctx->rnc = rnc;
 	ctx->conn_id = conn_id;
 	ctx->notification = true;
+	osmo_timer_setup(&ctx->release_timeout,
+			(void *)(void *) ranap_iu_free_ue,
+			ctx);
 	llist_add(&ctx->list, &ue_conn_ctx_list);
 
 	return ctx;
@@ -150,6 +153,7 @@
 	if (!ue_ctx)
 		return;
 
+	osmo_timer_del(&ue_ctx->release_timeout);
 	osmo_sccp_tx_disconn(g_scu, ue_ctx->conn_id, NULL, 0);
 	llist_del(&ue_ctx->list);
 	talloc_free(ue_ctx);
@@ -491,6 +495,20 @@
 	return osmo_sccp_user_sap_down(g_scu, &prim->oph);
 }
 
+void ranap_iu_tx_release_free(struct ranap_ue_conn_ctx *ctx,
+			     const struct RANAP_Cause *cause,
+			     int timeout)
+{
+	ctx->notification = false;
+	int ret = ranap_iu_tx_release(ctx, cause);
+	if (ret) {
+		ranap_iu_free_ue(ctx);
+		return;
+	}
+
+	osmo_timer_schedule(&ctx->release_timeout, timeout, 0);
+}
+
 static int ranap_handle_co_iu_rel_req(struct ranap_ue_conn_ctx *ctx, RANAP_Iu_ReleaseRequestIEs_t *ies)
 {
 	LOGPIU(LOGL_INFO, "Received Iu Release Request, Sending Release Command\n");

-- 
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Gerrit-Project: osmo-iuh
Gerrit-Branch: master
Gerrit-Change-Id: I349e2c61ba0131e233b7ab927dfced0bd461dd8f
Gerrit-Change-Number: 15473
Gerrit-PatchSet: 1
Gerrit-Owner: lynxis lazus <lynxis at fe80.eu>
Gerrit-MessageType: newchange
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