mirror of
https://github.com/amnezia-vpn/OpenVPNAdapter.git
synced 2026-06-30 05:55:12 +03:00
98 lines
2.9 KiB
C++
98 lines
2.9 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) 2012-2020 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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#pragma once
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#include <string>
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#include <openvpn/common/platform.hpp>
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#if !defined(OPENVPN_PLATFORM_WIN)
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#include <sys/types.h> // for open(), ftruncate()
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#include <sys/stat.h> // for open()
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#include <fcntl.h> // for open()
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#include <unistd.h> // for write(), ftruncate()
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#include <errno.h>
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#endif
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#include <openvpn/common/exception.hpp>
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#include <openvpn/common/size.hpp>
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#include <openvpn/buffer/buffer.hpp>
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#if !defined(OPENVPN_PLATFORM_WIN)
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#include <openvpn/common/scoped_fd.hpp>
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#include <openvpn/common/write.hpp>
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#include <openvpn/common/strerror.hpp>
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#endif
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namespace openvpn {
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#if defined(OPENVPN_PLATFORM_WIN)
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inline void write_private(const std::string& path, const void *buf, size_t count)
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{
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OPENVPN_THROW_EXCEPTION("write_private('" << path << "') : not implemented on Windows yet");
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}
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#else
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inline void write_private(const std::string& path, const void *buf, ssize_t count)
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{
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ScopedFD fd(::open(path.c_str(), O_WRONLY|O_CREAT|O_CLOEXEC, S_IRUSR|S_IWUSR));
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if (!fd.defined())
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{
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const int eno = errno;
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OPENVPN_THROW_EXCEPTION(path << " : open error : " << strerror_str(eno));
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}
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if (::ftruncate(fd(), 0) < 0)
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{
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const int eno = errno;
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OPENVPN_THROW_EXCEPTION(path << " : truncate error : " << strerror_str(eno));
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}
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const ssize_t len = write_retry(fd(), buf, count);
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if (len == -1)
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{
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const int eno = errno;
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OPENVPN_THROW_EXCEPTION(path << " : write error : " << strerror_str(eno));
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}
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else if (len != count)
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OPENVPN_THROW_EXCEPTION(path << " : unexpected write size");
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if (!fd.close())
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{
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const int eno = errno;
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OPENVPN_THROW_EXCEPTION(path << " : close error : " << strerror_str(eno));
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}
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}
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#endif
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inline void write_private(const std::string& path, const Buffer& buf)
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{
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write_private(path, buf.c_data(), buf.size());
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}
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inline void write_private(const std::string& path, const std::string& str)
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{
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write_private(path, str.c_str(), str.length());
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}
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}
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