Fixed #1621: Handle the case when ICE session cannot create valid checklist

git-svn-id: http://svn.pjsip.org/repos/pjproject/trunk@4357 74dad513-b988-da41-8d7b-12977e46ad98

1 files changed, 8 insertions, 0 deletions

diff --git a/pjnath/src/pjnath/ice_session.c b/pjnath/src/pjnath/ice_session.c
index 83199618..81aa8143 100644
--- a/pjnath/src/pjnath/ice_session.c
+++ b/pjnath/src/pjnath/ice_session.c
@@ -966,6 +966,7 @@ static void sort_checklist(pj_ice_sess *ice, pj_ice_sess_checklist *clist)
 	}
     }
 
+    pj_assert(clist->count > 0);
     for (i=0; i<clist->count-1; ++i) {
 	unsigned j, highest = i;
 
@@ -1690,6 +1691,13 @@ PJ_DEF(pj_status_t) pj_ice_sess_create_check_list(
 	}
     }
 
+    /* This could happen if candidates have no matching address families */
+    if (clist->count == 0) {
+	LOG4((ice->obj_name,  "Error: no checklist can be created"));
+	pj_mutex_unlock(ice->mutex);
+	return PJ_ENOTFOUND;
+    }
+
     /* Sort checklist based on priority */
     sort_checklist(ice, clist);