mirror of
https://github.com/OpenVPN/openvpn3.git
synced 2024-09-20 20:13:05 +02:00
131 lines
2.9 KiB
C++
131 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) 2012-2016 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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// Class that encapsulates the definition of an OSI layer.
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#ifndef OPENVPN_TUN_LAYER_H
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#define OPENVPN_TUN_LAYER_H
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#include <openvpn/common/exception.hpp>
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namespace openvpn {
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class Layer
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{
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public:
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enum Type {
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NONE,
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OSI_LAYER_2,
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OSI_LAYER_3,
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};
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Layer() : type_(NONE) {}
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explicit Layer(const Type t) : type_(t) {}
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Type operator()() const { return type_; }
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bool defined() const
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{
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return type_ != NONE;
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}
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const char *dev_type() const
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{
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switch (type_)
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{
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case OSI_LAYER_2:
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return "tap";
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case OSI_LAYER_3:
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return "tun";
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default:
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return "null";
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}
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}
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const char *str() const
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{
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switch (type_)
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{
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case NONE:
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return "UNDEF_LAYER";
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case OSI_LAYER_2:
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return "OSI_LAYER_2";
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case OSI_LAYER_3:
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return "OSI_LAYER_3";
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default:
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throw Exception("Layer: unrecognized layer type");
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}
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}
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int value() const
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{
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switch (type_)
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{
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case NONE:
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return 0;
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case OSI_LAYER_2:
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return 2;
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case OSI_LAYER_3:
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return 3;
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default:
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throw Exception("Layer: unrecognized layer type");
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}
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}
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static Layer from_str(const std::string& str)
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{
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if (str == "OSI_LAYER_3")
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return Layer(OSI_LAYER_3);
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else if (str == "OSI_LAYER_2")
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return Layer(OSI_LAYER_2);
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else if (str == "UNDEF_LAYER")
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return Layer(NONE);
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else
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throw Exception("Layer: unrecognized layer string");
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}
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static Layer from_value(const int value)
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{
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if (value == 3)
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return Layer(OSI_LAYER_3);
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else if (value == 2)
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return Layer(OSI_LAYER_2);
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else if (value == 0)
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return Layer(NONE);
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else
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throw Exception("Layer: unrecognized layer value");
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}
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bool operator==(const Layer& other) const
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{
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return type_ == other.type_;
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}
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bool operator!=(const Layer& other) const
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{
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return type_ != other.type_;
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}
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private:
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Type type_;
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};
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} // namespace openvpn
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#endif // OPENVPN_TUN_LAYER_H
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