libgtp: implement gtp_clear_queues to clear req/resp queue

Clearing the request and response queue is useful for debugging
to reset "some" state. Otherwise some tests will get un-expected
packets.

Change-Id: I279d1d7cbf5d37dd5609c2b968f317fe9a0e348d

2 files changed, 20 insertions, 0 deletions

diff --git a/gtp/gtp.c b/gtp/gtp.c
index 1d58088..b98fba0 100644
--- a/gtp/gtp.c
+++ b/gtp/gtp.c
@@ -496,6 +496,24 @@ static int gtp_req(struct gsn_t *gsn, uint8_t version, struct pdp_t *pdp,
 	return 0;
 }
 
+
+/**
+ * @brief clear the request and response queue. Useful for debugging to reset "some" state.
+ * @param gsn The GGSN instance
+ */
+void gtp_clear_queues(struct gsn_t *gsn)
+{
+	struct qmsg_t *qmsg;
+
+	while (!queue_getfirst(gsn->queue_req, &qmsg)) {
+		queue_freemsg(gsn->queue_req, qmsg);
+	}
+
+	while (!queue_getfirst(gsn->queue_resp, &qmsg)) {
+		queue_freemsg(gsn->queue_resp, qmsg);
+	}
+}
+
 /* gtp_conf
  * Remove signalling packet from retransmission queue.
  * return 0 on success, EOF if packet was not found */
diff --git a/gtp/gtp.h b/gtp/gtp.h
index ed594f1..5f35ab5 100644
--- a/gtp/gtp.h
+++ b/gtp/gtp.h
@@ -369,6 +369,8 @@ int gtp_set_cb_recovery2(struct gsn_t *gsn,
 				   struct pdp_t * pdp,
 				   uint8_t recovery));
 
+void gtp_clear_queues(struct gsn_t *gsn);
+
 /* Internal functions (not part of the API */
 
 extern int gtp_echo_req(struct gsn_t *gsn, int version, void *cbp,