mirror of
https://github.com/deneraraujo/OpenVPNAdapter.git
synced 2026-02-11 00:00:08 +08:00
117 lines
2.8 KiB
C++
117 lines
2.8 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) 2012-2017 OpenVPN 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 Affero 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 Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero 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_TUN_PERSIST_TUNWRAP_H
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#define OPENVPN_TUN_PERSIST_TUNWRAP_H
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#include <openvpn/common/size.hpp>
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#include <openvpn/common/destruct.hpp>
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namespace openvpn {
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// TunWrapTemplate is used client-side to store the underlying tun
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// interface fd/handle. SCOPED_OBJ is generally a ScopedFD (unix) or a
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// ScopedHANDLE (Windows). It can also be a ScopedAsioStream.
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template <typename SCOPED_OBJ>
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class TunWrapTemplate : public RC<thread_unsafe_refcount>
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{
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public:
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typedef RCPtr<TunWrapTemplate> Ptr;
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TunWrapTemplate(const bool retain_obj)
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: retain_obj_(retain_obj)
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{
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}
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virtual ~TunWrapTemplate()
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{
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close();
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}
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bool obj_defined() const
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{
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return obj_.defined();
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}
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// Current persisted tun fd/handle
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typename SCOPED_OBJ::base_type obj() const
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{
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return obj_();
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}
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bool destructor_defined() const
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{
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return bool(destruct_);
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}
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// destruct object performs cleanup prior to TAP device
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// HANDLE close, such as removing added routes.
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void add_destructor(const DestructorBase::Ptr& destruct)
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{
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close_destructor();
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destruct_ = destruct;
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}
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void close_destructor()
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{
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try {
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if (destruct_)
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{
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std::ostringstream os;
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destruct_->destroy(os);
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OPENVPN_LOG_STRING(os.str());
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destruct_.reset();
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}
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}
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catch (const std::exception& e)
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{
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OPENVPN_LOG("TunWrap destructor exception: " << e.what());
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}
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}
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void close()
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{
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if (retain_obj_)
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obj_.release();
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else
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{
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close_destructor();
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obj_.close();
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}
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}
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void save_replace_sock(const typename SCOPED_OBJ::base_type obj)
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{
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if (retain_obj_)
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obj_.replace(obj);
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else
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obj_.reset(obj);
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}
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private:
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const bool retain_obj_;
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DestructorBase::Ptr destruct_;
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SCOPED_OBJ obj_;
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};
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}
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#endif
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