1 files changed, 76 insertions, 0 deletions
diff --git a/src/lib/util/io/sockaddr_util.h b/src/lib/util/io/sockaddr_util.h
new file mode 100644
index 0000000..1cb31f2
--- /dev/null
+++ b/src/lib/util/io/sockaddr_util.h
@@ -0,0 +1,76 @@
+// Copyright (C) 2011-2020 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 SOCKADDR_UTIL_H
+#define SOCKADDR_UTIL_H 1
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+
+#include <exceptions/isc_assert.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 {
+
+inline socklen_t
+getSALength(const struct sockaddr& sa) {
+    if (sa.sa_family == AF_INET) {
+        return (sizeof(struct sockaddr_in));
+    } else {
+        isc_throw_assert(sa.sa_family == AF_INET6);
+        return (sizeof(struct sockaddr_in6));
+    }
+}
+
+// Lower level C-APIs require conversion between various variants of
+// sockaddr's, which is not friendly with C++.  The following templates
+// are a shortcut of common workaround conversion in such cases.
+
+template <typename SAType>
+const struct sockaddr*
+convertSockAddr(const SAType* sa) {
+    const void* p = sa;
+    return (static_cast<const struct sockaddr*>(p));
+}
+
+template <typename SAType>
+const SAType*
+convertSockAddr(const struct sockaddr* sa) {
+    const void* p = sa;
+    return (static_cast<const SAType*>(p));
+}
+
+template <typename SAType>
+struct sockaddr*
+convertSockAddr(SAType* sa) {
+    void* p = sa;
+    return (static_cast<struct sockaddr*>(p));
+}
+
+template <typename SAType>
+SAType*
+convertSockAddr(struct sockaddr* sa) {
+    void* p = sa;
+    return (static_cast<SAType*>(p));
+}
+
+}
+}
+}
+}
+
+#endif  // SOCKADDR_UTIL_H
+
+// Local Variables:
+// mode: c++
+// End: