mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
04b2a3c9b7
Signed-off-by: Samuli Seppänen <samuli@openvpn.net>
109 lines
2.6 KiB
C++
109 lines
2.6 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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// A scoped Asio stream that is automatically closed by its destructor.
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#ifndef OPENVPN_COMMON_SCOPED_ASIO_STREAM_H
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#define OPENVPN_COMMON_SCOPED_ASIO_STREAM_H
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#include <openvpn/common/size.hpp>
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namespace openvpn {
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template <typename STREAM>
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class ScopedAsioStream
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{
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ScopedAsioStream(const ScopedAsioStream&) = delete;
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ScopedAsioStream& operator=(const ScopedAsioStream&) = delete;
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public:
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typedef STREAM* base_type;
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ScopedAsioStream() : obj_(undefined()) {}
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explicit ScopedAsioStream(STREAM *obj)
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: obj_(obj) {}
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static STREAM* undefined() { return nullptr; }
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STREAM* release()
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{
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STREAM* ret = obj_;
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obj_ = nullptr;
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//OPENVPN_LOG("**** SAS RELEASE=" << ret);
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return ret;
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}
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static bool defined_static(STREAM* obj)
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{
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return obj != nullptr;
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}
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bool defined() const
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{
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return defined_static(obj_);
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}
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STREAM* operator()() const
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{
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return obj_;
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}
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void reset(STREAM* obj)
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{
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close();
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obj_ = obj;
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//OPENVPN_LOG("**** SAS RESET=" << obj_);
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}
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// unusual semantics: replace obj without closing it first
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void replace(STREAM* obj)
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{
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//OPENVPN_LOG("**** SAS REPLACE " << obj_ << " -> " << obj);
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obj_ = obj;
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}
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// return false if close error
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bool close()
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{
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if (defined())
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{
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//OPENVPN_LOG("**** SAS CLOSE obj=" << obj_);
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delete obj_;
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obj_ = nullptr;
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}
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return true;
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}
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~ScopedAsioStream()
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{
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//OPENVPN_LOG("**** SAS DESTRUCTOR");
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close();
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}
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private:
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STREAM* obj_;
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};
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} // namespace openvpn
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#endif
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