[GitHub] [incubator-nuttx] anchao commented on a change in pull request #3893: libs/libc/netdb: add dns clear interface

[GitBox <gi...@apache.org>]

anchao commented on a change in pull request #3893:
URL: https://github.com/apache/incubator-nuttx/pull/3893#discussion_r649724351



##########
File path: libs/libc/netdb/lib_dnscache.c
##########
@@ -164,6 +164,33 @@ void dns_save_answer(FAR const char *hostname,
   dns_semgive();
 }
 
+/****************************************************************************
+ * Name: dns_clear_answer
+ *
+ * Description:
+ *   Clear the resolved hostname in the DNS cache
+ *
+ * Returned Value:
+ *   None
+ *
+ ****************************************************************************/
+
+void dns_clear_answer(void)
+{
+  /* Get exclusive access to the DNS cache */
+
+  dns_semtake();
+
+  /* Clear the answer in the cache */
+
+  memset(g_dns_cache, 0, sizeof(g_dns_cache));

Review comment:
       Done




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