From: Matt Caswell <matt@openssl.org>
Date: Mon, 26 Jan 2015 16:47:36 +0000 (+0000)
Subject: Make DTLS always act as if read_ahead is set. The actual value of read_ahead
X-Git-Tag: OpenSSL_1_0_2a~99
X-Git-Url: https://git.openssl.org/gitweb/?a=commitdiff_plain;h=11b32d6e29b87eaf8d14f218ff2a739af2237555;p=openssl.git

Make DTLS always act as if read_ahead is set. The actual value of read_ahead
is ignored for DTLS.

RT#3657

Reviewed-by: Andy Polyakov <appro@openssl.org>
(cherry picked from commit 8dd4ad0ff5d1d07ec4b6dd5d5104131269a472aa)
---

diff --git a/ssl/s3_pkt.c b/ssl/s3_pkt.c
index ec56c55493..d5ddb609d2 100644
--- a/ssl/s3_pkt.c
+++ b/ssl/s3_pkt.c
@@ -231,7 +231,8 @@ int ssl3_read_n(SSL *s, int n, int max, int extend)
         return -1;
     }
 
-    if (!s->read_ahead)
+    /* We always act like read_ahead is set for DTLS */
+    if (!s->read_ahead && !SSL_IS_DTLS(s))
         /* ignore max parameter */
         max = n;
     else {