1 files changed, 43 insertions, 0 deletions
diff --git a/src/lib/util/io/pktinfo_utilities.h b/src/lib/util/io/pktinfo_utilities.h
new file mode 100644
index 0000000..2625008
--- /dev/null
+++ b/src/lib/util/io/pktinfo_utilities.h
@@ -0,0 +1,43 @@
+// Copyright (C) 2012-2015 Internet Systems Consortium, Inc. ("ISC")
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#ifndef PKTINFO_UTIL_H
+#define PKTINFO_UTIL_H 1
+
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+// These definitions in this file are for the convenience of internal
+// implementation and test code, and are not intended to be used publicly.
+// The namespace "internal" indicates the intent.
+
+namespace isc {
+namespace util {
+namespace io {
+namespace internal {
+
+// Lower level C-APIs require conversion between char* pointers
+// (like structures returned by CMSG_DATA macro) and in6_pktinfo,
+// which is not friendly with C++. The following templates
+// are a shortcut of common workaround conversion in such cases.
+inline struct in6_pktinfo*
+convertPktInfo6(char* pktinfo) {
+    return (static_cast<struct in6_pktinfo*>(static_cast<void*>(pktinfo)));
+}
+
+inline struct in6_pktinfo*
+convertPktInfo6(unsigned char* pktinfo) {
+    return (static_cast<struct in6_pktinfo*>(static_cast<void*>(pktinfo)));
+}
+
+/// @todo: Do we need const versions as well?
+
+}
+}
+}
+}
+
+#endif  // PKTINFO_UTIL_H