Implement Maximum Fragment Length TLS extension.

[thirdparty/openssl.git] / ssl / record / ssl3_buffer.c

diff --git a/ssl/record/ssl3_buffer.c b/ssl/record/ssl3_buffer.c
index 8a6a922261af36b6114ddeb04e5051cd00c2064d..da23b36791daf39a30e16b7de2a99af9e2473559 100644 (file)
--- a/ssl/record/ssl3_buffer.c
+++ b/ssl/record/ssl3_buffer.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
+ * Copyright 1995-2017 The OpenSSL Project Authors. All Rights Reserved.
  *
  * Licensed under the OpenSSL license (the "License").  You may not use
  * this file except in compliance with the License.  You can obtain a copy
@@ -93,7 +93,7 @@ int ssl3_setup_write_buffer(SSL *s, size_t numwpipes, size_t len)
         align = (-SSL3_RT_HEADER_LENGTH) & (SSL3_ALIGN_PAYLOAD - 1);
 #endif
 
-        len = s->max_send_fragment
+        len = ssl_get_max_send_fragment(s)
             + SSL3_RT_SEND_MAX_ENCRYPTED_OVERHEAD + headerlen + align;
 #ifndef OPENSSL_NO_COMP
         if (ssl_allow_compression(s))
@@ -107,6 +107,11 @@ int ssl3_setup_write_buffer(SSL *s, size_t numwpipes, size_t len)
     for (currpipe = 0; currpipe < numwpipes; currpipe++) {
         SSL3_BUFFER *thiswb = &wb[currpipe];
 
+        if (thiswb->buf != NULL && thiswb->len != len) {
+            OPENSSL_free(thiswb->buf);
+            thiswb->buf = NULL;         /* force reallocation */
+        }
+
         if (thiswb->buf == NULL) {
             p = OPENSSL_malloc(len);
             if (p == NULL) {