mirror of
https://github.com/OpenVPN/openvpn3.git
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52 lines
2.0 KiB
C++
52 lines
2.0 KiB
C++
// OpenVPN -- An application to securely tunnel IP networks
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// over a single port, with support for SSL/TLS-based
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// session authentication and key exchange,
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// packet encryption, packet authentication, and
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// packet compression.
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//
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// Copyright (C) 2012-2016 OpenVPN Technologies, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License Version 3
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// as published by the Free Software Foundation.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program in the COPYING file.
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// If not, see <http://www.gnu.org/licenses/>.
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#ifndef OPENVPN_COMMON_LINK_H
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#define OPENVPN_COMMON_LINK_H
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namespace openvpn {
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// Link creates a sender-receiver relationship between two objects.
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// SEND is the sender interface, while RECV is the receiver interface.
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// The receiver class should publicly inherit from Link and implement
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// the receiver interface.
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// Multiple inheritance of Link is intended for objects that play a
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// receiver role for multiple interfaces (such as the server-side
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// client instance object), and for this reason RECV common base
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// classes such as RC should be virtually inherited.
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// Usage of Link may create a memory reference cycle between
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// Link-derived objects and the SEND object. Therefore be sure
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// to manually break cycles as part of an explicit stop() method.
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template <typename SEND, typename RECV>
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class Link : public RECV
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{
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protected:
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Link() {}
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Link(const typename SEND::Ptr& send_arg) : send(send_arg) {}
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Link(SEND* send_arg) : send(send_arg) {}
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typename SEND::Ptr send;
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};
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}
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#endif
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