mirror of
https://github.com/deneraraujo/OpenVPNAdapter.git
synced 2026-02-11 00:00:08 +08:00
77 lines
2.3 KiB
C++
77 lines
2.3 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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// Tun interface utilities for Mac OS X.
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#ifndef OPENVPN_TUN_MAC_TUNUTIL_H
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#define OPENVPN_TUN_MAC_TUNUTIL_H
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#include <fcntl.h>
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#include <errno.h>
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#include <string>
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#include <openvpn/common/size.hpp>
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#include <openvpn/common/exception.hpp>
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#include <openvpn/asio/asioerr.hpp>
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#include <openvpn/common/to_string.hpp>
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#include <openvpn/common/scoped_fd.hpp>
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#include <openvpn/tun/layer.hpp>
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namespace openvpn {
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namespace TunMac {
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namespace Util {
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OPENVPN_EXCEPTION(tun_mac_util);
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inline int tuntap_open(const Layer& layer, std::string& name)
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{
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for (int i = 0; i < 256; ++i)
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{
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const char *tuntap;
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if (layer() == Layer::OSI_LAYER_3)
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tuntap = "tun";
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else if (layer() == Layer::OSI_LAYER_2)
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tuntap = "tap";
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else
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throw tun_mac_util("unknown OSI layer");
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const std::string node_str = tuntap + to_string(i);
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const std::string node_fn = "/dev/" + node_str;
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ScopedFD fd(open(node_fn.c_str(), O_RDWR));
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if (fd.defined())
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{
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// got it
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if (fcntl(fd(), F_SETFL, O_NONBLOCK) < 0)
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throw tun_mac_util("fcntl error on " + node_fn + " : " + errinfo(errno));
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name = node_str;
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return fd.release();
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}
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}
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throw tun_mac_util(std::string("error opening Mac ") + layer.dev_type() + " device");
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}
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}
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}
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}
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#endif
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