From bdbc67b188841f4829306a26ec4f57cd38acee02 Mon Sep 17 00:00:00 2001
From: Bruno Silvestre <brunoos@inf.ufg.br>
Date: Sat, 29 May 2021 10:11:02 -0300
Subject: [PATCH] Move the fix of SSL_get_error() in OpenSSL 1.1.1

Moving to lsec_socket_error() coverts better 'errno == 0' with SSL_ERROR_SYSCALL.
---
 src/compat.h | 6 ++++++
 src/ssl.c    | 9 +++++----
 2 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/compat.h b/src/compat.h
index 00d320c..8848f3d 100644
--- a/src/compat.h
+++ b/src/compat.h
@@ -48,4 +48,10 @@
 
 //------------------------------------------------------------------------------
 
+#if !defined(LIBRESSL_VERSION_NUMBER) && ((OPENSSL_VERSION_NUMBER & 0xFFFFF000L) == 0x10101000L)
+#define LSEC_OPENSSL_1_1_1
+#endif
+
+//------------------------------------------------------------------------------
+
 #endif
diff --git a/src/ssl.c b/src/ssl.c
index 82ed595..2cd213f 100644
--- a/src/ssl.c
+++ b/src/ssl.c
@@ -48,6 +48,11 @@ static int lsec_socket_error()
 #if defined(WIN32)
   return WSAGetLastError();
 #else
+#if defined(LSEC_OPENSSL_1_1_1)
+  // Bug in OpenSSL 1.1.1
+  if (errno == 0)
+    return LSEC_IO_SSL;
+#endif
   return errno;
 #endif
 }
@@ -182,10 +187,6 @@ static int ssl_send(void *ctx, const char *data, size_t count, size_t *sent,
         ssl->error = SSL_ERROR_SSL;
         return LSEC_IO_SSL;
       }
-      /* Return failure when SSL reports syscall error
-       * but errno is not set to break send operation. */
-      if (errno == 0)
-        return LSEC_IO_SSL;
       if (err == 0)
         return IO_CLOSED;
       return lsec_socket_error();