mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 12:12:15 +02:00
ef42e59e05
Signed-off-by: James Yonan <james@openvpn.net>
147 lines
3.2 KiB
C++
147 lines
3.2 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_PIPE_H
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#define OPENVPN_COMMON_PIPE_H
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#include <unistd.h>
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#include <errno.h>
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#include <string>
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#include <asio.hpp>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/common/scoped_fd.hpp>
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#include <openvpn/buffer/buflist.hpp>
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namespace openvpn {
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namespace Pipe {
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class SD
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{
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public:
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SD(asio::io_context& io_context, ScopedFD& fd)
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{
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if (fd.defined())
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sd.reset(new asio::posix::stream_descriptor(io_context, fd.release()));
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}
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bool defined() const
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{
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return bool(sd);
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}
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protected:
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std::unique_ptr<asio::posix::stream_descriptor> sd;
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};
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class SD_OUT : public SD
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{
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public:
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SD_OUT(asio::io_context& io_context, const std::string& content, ScopedFD& fd)
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: SD(io_context, fd)
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{
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if (defined())
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{
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buf = buf_alloc_from_string(content);
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queue_write();
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}
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}
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private:
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void queue_write()
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{
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sd->async_write_some(buf.const_buffer_limit(2048),
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[this](const asio::error_code& ec, const size_t bytes_sent) {
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if (!ec && bytes_sent < buf.size())
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{
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buf.advance(bytes_sent);
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queue_write();
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}
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else
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{
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sd->close();
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}
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});
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}
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BufferAllocated buf;
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};
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class SD_IN : public SD
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{
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public:
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SD_IN(asio::io_context& io_context, ScopedFD& fd)
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: SD(io_context, fd)
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{
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if (defined())
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queue_read();
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}
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const std::string content() const
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{
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return data.to_string();
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}
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private:
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void queue_read()
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{
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buf.reset(0, 2048, 0);
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sd->async_read_some(buf.mutable_buffer_clamp(),
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[this](const asio::error_code& ec, const size_t bytes_recvd) {
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if (!ec)
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{
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buf.set_size(bytes_recvd);
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data.put_consume(buf);
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queue_read();
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}
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else
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{
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sd->close();
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}
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});
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}
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BufferAllocated buf;
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BufferList data;
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};
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inline void make_pipe(int fd[2])
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{
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if (::pipe(fd) < 0)
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{
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const int eno = errno;
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OPENVPN_THROW_EXCEPTION("error creating pipe : " << std::strerror(eno));
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}
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}
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inline void make_pipe(ScopedFD& read, ScopedFD& write)
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{
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int fd[2];
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make_pipe(fd);
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read.reset(fd[0]);
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write.reset(fd[1]);
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}
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}
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}
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#endif
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