Avoid sending alerts after shutdown
Fixes
@@ -52,6 +52,8 @@ int ssl3_send_alert(SSL *s, int level, int desc)
* protocol_version alerts */
if (desc < 0)
return -1;
+ if (s->shutdown & SSL_SENT_SHUTDOWN && desc != SSL_AD_CLOSE_NOTIFY)
+ return -1;
/* If a fatal one, remove from cache */
if ((level == SSL3_AL_FATAL) && (s->session != NULL))
SSL_CTX_remove_session(s->session_ctx, s->session);
