diff --git a/library/ssl_tls.c b/library/ssl_tls.c
index 759dca0..7e8476c 100644
--- a/library/ssl_tls.c
+++ b/library/ssl_tls.c
@@ -6392,6 +6392,67 @@
     return( ssl->in_offt == NULL ? 0 : ssl->in_msglen );
 }
 
+int mbedtls_ssl_check_pending( const mbedtls_ssl_context *ssl )
+{
+    /*
+     * Case A: We're currently holding back
+     * a message for further processing.
+     */
+
+    if( ssl->keep_current_message == 1 )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 3, ( "ssl_check_pending: record "
+                                    "held back for processing" ) );
+        return( 1 );
+    }
+
+    /*
+     * Case B: Further records are pending in the current datagram.
+     */
+
+#if defined(MBEDTLS_SSL_PROTO_DTLS)
+    if( ssl->conf->transport == MBEDTLS_SSL_TRANSPORT_DATAGRAM &&
+        ssl->in_left > ssl->next_record_offset )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 3, ( "ssl_check_pending: more records "
+                                    "within current datagram" ) );
+        return( 1 );
+    }
+#endif /* MBEDTLS_SSL_PROTO_DTLS */
+
+    /*
+     * Case C: A handshake message is being processed.
+     */
+
+    /* TODO This needs correction in the same way as
+     *      read_record_layer, see IOTSSL-1414 */
+    if( ssl->in_hslen > 0 && ssl->in_hslen < ssl->in_msglen )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 3, ( "ssl_check_pending: more handshake "
+                                    "messages within current record" ) );
+        return( 1 );
+    }
+
+    /*
+     * Case D: An application data message is being processed
+     */
+    if( ssl->in_offt != NULL )
+    {
+        MBEDTLS_SSL_DEBUG_MSG( 3, ( "ssl_check_pending: application data "
+                                    "record is being processed" ) );
+        return( 1 );
+    }
+
+    /*
+     * In all other cases, the rest of the message can be dropped.
+     * As in ssl_read_record_layer, this needs to be adapted if
+     * we implement support for multiple alerts in single records.
+     */
+
+    MBEDTLS_SSL_DEBUG_MSG( 3, ( "ssl_check_pending: nothing pending" ) );
+    return( 0 );
+}
+
 uint32_t mbedtls_ssl_get_verify_result( const mbedtls_ssl_context *ssl )
 {
     if( ssl->session != NULL )