ike_sa: Defer task manager destruction after child destruction

This patch exports the task manager's flush to allow flushing of all
queues with one function call from ike_sa->destroy. It allows the
access of intact children during task destructoin (see git-commit
e44ebdcf) and allows the access of the task manager in
child_state_change hook.

Signed-off-by: Thomas Egerer <[email protected]>

src/libcharon/sa/ikev1/task_manager_v1.c

@@ -339,10 +339,8 @@ METHOD(task_manager_t, flush_queue, void,
 	}
 }
 
-/**
- * flush all tasks in the task manager
- */
-static void flush(private_task_manager_t *this)
+METHOD(task_manager_t, flush, void,
+	private_task_manager_t *this)
 {
 	flush_queue(this, TASK_QUEUE_QUEUED);
 	flush_queue(this, TASK_QUEUE_PASSIVE);
@@ -2070,6 +2068,7 @@ task_manager_v1_t *task_manager_v1_create(ike_sa_t *ike_sa)
 				.adopt_child_tasks = _adopt_child_tasks,
 				.busy = _busy,
 				.create_task_enumerator = _create_task_enumerator,
+				.flush = _flush,
 				.flush_queue = _flush_queue,
 				.destroy = _destroy,
 			},