1 files changed, 50 insertions, 0 deletions
diff --git a/usr/src/contrib/mDNSResponder/mDNSShared/mDNSFeatures.h b/usr/src/contrib/mDNSResponder/mDNSShared/mDNSFeatures.h
new file mode 100644
index 0000000000..3f2f79e925
--- /dev/null
+++ b/usr/src/contrib/mDNSResponder/mDNSShared/mDNSFeatures.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (c) 2019 Apple Inc. All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __mDNSFeatures_h
+#define __mDNSFeatures_h
+
+#if MDNSRESPONDER_PLATFORM_APPLE
+#include "ApplePlatformFeatures.h"
+#endif
+
+// Common Features
+
+#undef MDNSRESPONDER_PLATFORM_COMMON
+#define MDNSRESPONDER_PLATFORM_COMMON       1
+
+// Feature: DNS Push
+// Radar:   <rdar://problem/23226275>
+// Enabled: Yes, for Apple.
+
+#if !defined(MDNSRESPONDER_SUPPORTS_COMMON_DNS_PUSH)
+    #if defined(MDNSRESPONDER_PLATFORM_APPLE) && MDNSRESPONDER_PLATFORM_APPLE
+        #define MDNSRESPONDER_SUPPORTS_COMMON_DNS_PUSH      1
+    #else
+        #define MDNSRESPONDER_SUPPORTS_COMMON_DNS_PUSH      0
+    #endif
+#endif
+
+#define HAS_FEATURE_CAT(A, B)       A ## B
+#define HAS_FEATURE_CHECK_0         1
+#define HAS_FEATURE_CHECK_1         1
+#define HAS_FEATURE(X)              ((X) / HAS_FEATURE_CAT(HAS_FEATURE_CHECK_, X))
+
+#define MDNSRESPONDER_SUPPORTS(PLATFORM, FEATURE) \
+    (defined(MDNSRESPONDER_PLATFORM_ ## PLATFORM) && MDNSRESPONDER_PLATFORM_ ## PLATFORM && \
+    HAS_FEATURE(MDNSRESPONDER_SUPPORTS_ ## PLATFORM ## _ ## FEATURE))
+
+#endif  // __mDNSFeatures_h