SPDX: license tags (mostly by guesswork)

[exim.git] / src / src / dane.c

diff --git a/src/src/dane.c b/src/src/dane.c
index 20dfe5b180a28fc9ac1e3908110d20dfd955b48d..f2ad22481343fa3a5cc94ebc659725cd71de5ed8 100644 (file)
--- a/src/src/dane.c
+++ b/src/src/dane.c
@@ -4,6 +4,7 @@
 
 /* Copyright (c) University of Cambridge 1995 - 2012, 2014 */
 /* See the file NOTICE for conditions of use and distribution. */
+/* SPDX-License-Identifier: GPL-2.0-only */
 
 /* This module provides DANE (RFC6659) support for Exim.  See also
 the draft RFC for DANE-over-SMTP, "SMTP security via opportunistic DANE TLS"
@@ -24,22 +25,25 @@ reference itself to stop picky compilers complaining that it is unused, and put
 in a dummy argument to stop even pickier compilers complaining about infinite
 loops. */
 
-#ifndef EXPERIMENTAL_DANE
+#ifndef SUPPORT_DANE
 static void dummy(int x) { dummy(x-1); }
 #else
 
 /* Enabling DANE without enabling TLS cannot work. Abort the compilation. */
-# ifndef SUPPORT_TLS
+# ifdef DISABLE_TLS
 #  error DANE support requires that TLS support must be enabled. Abort build.
 # endif
 
-# ifdef USE_GNUTLS
-#  include "dane-gnu.c"
-# else
+/* DNSSEC support is also required */
+# ifndef RES_USE_DNSSEC
+#  error DANE support requires that the DNS resolver library supports DNSSEC
+# endif
+
+# ifdef USE_OPENSSL
 #  include "dane-openssl.c"
 # endif
 
 
-#endif  /* EXPERIMENTAL_DANE */
+#endif  /* SUPPORT_DANE */
 
 /* End of dane.c */