Merge commit '86cc97e55fe346502462284d2e636a2b3708163e' as 'Sources/OpenVPN3'

Sources/OpenVPN3/openvpn/ssl/sni_handler.hpp

@@ -0,0 +1,52 @@
+//    OpenVPN -- An application to securely tunnel IP networks
+//               over a single port, with support for SSL/TLS-based
+//               session authentication and key exchange,
+//               packet encryption, packet authentication, and
+//               packet compression.
+//
+//    Copyright (C) 2012-2019 OpenVPN Inc.
+//
+//    This program is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Affero General Public License Version 3
+//    as published by the Free Software Foundation.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU Affero General Public License for more details.
+//
+//    You should have received a copy of the GNU Affero General Public License
+//    along with this program in the COPYING file.
+//    If not, see <http://www.gnu.org/licenses/>.
+
+#pragma once
+
+#include <string>
+#include <memory>
+
+#include <openvpn/ssl/sslapi.hpp>
+#include <openvpn/ssl/sni_metadata.hpp>
+
+namespace openvpn {
+  namespace SNI {
+
+    // Abstract base class used to provide an SNI handler
+    class HandlerBase
+    {
+    public:
+      typedef std::unique_ptr<HandlerBase> UPtr;
+
+      // Return a new SSLFactoryAPI for this SNI name.
+      // Implementation may also set sni_metadata.
+      // Return SSLFactoryAPI::Ptr() if sni_name is not recognized.
+      // The caller guarantees that sni_name is valid UTF-8 and
+      // doesn't contain any control characters.
+      virtual SSLFactoryAPI::Ptr sni_hello(const std::string& sni_name,
+					   SNI::Metadata::UPtr& sni_metadata,
+					   SSLConfigAPI::Ptr default_factory) const = 0;
+
+      virtual ~HandlerBase() {}
+    };
+
+  }
+}