only send heartbeat extension from server if client sent one
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index c5c805c..e38bd9f 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -812,17 +812,20 @@
}
#ifndef OPENSSL_NO_HEARTBEATS
- /* Add Heartbeat extension */
- s2n(TLSEXT_TYPE_heartbeat,ret);
- s2n(1,ret);
- /* Set mode:
- * 1: peer may send requests
- * 2: peer not allowed to send requests
- */
- if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
- *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
- else
- *(ret++) = SSL_TLSEXT_HB_ENABLED;
+ /* Add Heartbeat extension if we've received one */
+ if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED)
+ {
+ s2n(TLSEXT_TYPE_heartbeat,ret);
+ s2n(1,ret);
+ /* Set mode:
+ * 1: peer may send requests
+ * 2: peer not allowed to send requests
+ */
+ if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
+ *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
+ else
+ *(ret++) = SSL_TLSEXT_HB_ENABLED;
+ }
#endif
#ifndef OPENSSL_NO_NEXTPROTONEG
