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/*
* Copyright 2004 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/nat_types.h"
#include "rtc_base/checks.h"
namespace rtc {
class SymmetricNAT : public NAT {
public:
bool IsSymmetric() override { return true; }
bool FiltersIP() override { return true; }
bool FiltersPort() override { return true; }
};
class OpenConeNAT : public NAT {
public:
bool IsSymmetric() override { return false; }
bool FiltersIP() override { return false; }
bool FiltersPort() override { return false; }
};
class AddressRestrictedNAT : public NAT {
public:
bool IsSymmetric() override { return false; }
bool FiltersIP() override { return true; }
bool FiltersPort() override { return false; }
};
class PortRestrictedNAT : public NAT {
public:
bool IsSymmetric() override { return false; }
bool FiltersIP() override { return true; }
bool FiltersPort() override { return true; }
};
NAT* NAT::Create(NATType type) {
switch (type) {
case NAT_OPEN_CONE:
return new OpenConeNAT();
case NAT_ADDR_RESTRICTED:
return new AddressRestrictedNAT();
case NAT_PORT_RESTRICTED:
return new PortRestrictedNAT();
case NAT_SYMMETRIC:
return new SymmetricNAT();
default:
RTC_DCHECK_NOTREACHED();
return 0;
}
}
} // namespace rtc
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