From 02461e9fbcb0698b412e1c623432fd6dad2aa524 Mon Sep 17 00:00:00 2001
From: Steffen Moser <steffen.moser@uni-ulm.de>
Date: Tue, 23 Aug 2022 08:58:45 +0200
Subject: [PATCH] First step to re-enable compilation with OpenSSL 1.0.x

---
 src/apps/relay/netengine.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/src/apps/relay/netengine.c b/src/apps/relay/netengine.c
index 3921412..bd95625 100644
--- a/src/apps/relay/netengine.c
+++ b/src/apps/relay/netengine.c
@@ -30,6 +30,17 @@
 
 #include "mainrelay.h"
 
+//////////// Backward compatibility with OpenSSL 1.0.x //////////////
+#define HAVE_OPENSSL11_API (!(OPENSSL_VERSION_NUMBER < 0x10100001L || defined LIBRESSL_VERSION_NUMBER))
+
+#ifndef HAVE_SSL_CTX_UP_REF
+#define HAVE_SSL_CTX_UP_REF HAVE_OPENSSL11_API
+#endif
+
+#if !HAVE_SSL_CTX_UP_REF
+#define SSL_CTX_up_ref(ctx) CRYPTO_add(&(ctx)->references, 1, CRYPTO_LOCK_SSL_CTX)
+#endif
+
 //////////// Barrier for the threads //////////////
 
 #if !defined(TURN_NO_THREAD_BARRIERS)