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| 1 /* | |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | |
| 3 * | |
| 4 * Use of this source code is governed by a BSD-style license | |
| 5 * that can be found in the LICENSE file in the root of the source | |
| 6 * tree. An additional intellectual property rights grant can be found | |
| 7 * in the file PATENTS. All contributing project authors may | |
| 8 * be found in the AUTHORS file in the root of the source tree. | |
| 9 */ | |
| 10 | |
| 11 #include "webrtc/base/nattypes.h" | |
| 12 | |
| 13 #include "webrtc/base/checks.h" | |
| 14 | |
| 15 namespace rtc { | |
| 16 | |
| 17 class SymmetricNAT : public NAT { | |
| 18 public: | |
| 19 bool IsSymmetric() override { return true; } | |
| 20 bool FiltersIP() override { return true; } | |
| 21 bool FiltersPort() override { return true; } | |
| 22 }; | |
| 23 | |
| 24 class OpenConeNAT : public NAT { | |
| 25 public: | |
| 26 bool IsSymmetric() override { return false; } | |
| 27 bool FiltersIP() override { return false; } | |
| 28 bool FiltersPort() override { return false; } | |
| 29 }; | |
| 30 | |
| 31 class AddressRestrictedNAT : public NAT { | |
| 32 public: | |
| 33 bool IsSymmetric() override { return false; } | |
| 34 bool FiltersIP() override { return true; } | |
| 35 bool FiltersPort() override { return false; } | |
| 36 }; | |
| 37 | |
| 38 class PortRestrictedNAT : public NAT { | |
| 39 public: | |
| 40 bool IsSymmetric() override { return false; } | |
| 41 bool FiltersIP() override { return true; } | |
| 42 bool FiltersPort() override { return true; } | |
| 43 }; | |
| 44 | |
| 45 NAT* NAT::Create(NATType type) { | |
| 46 switch (type) { | |
| 47 case NAT_OPEN_CONE: | |
| 48 return new OpenConeNAT(); | |
| 49 case NAT_ADDR_RESTRICTED: | |
| 50 return new AddressRestrictedNAT(); | |
| 51 case NAT_PORT_RESTRICTED: | |
| 52 return new PortRestrictedNAT(); | |
| 53 case NAT_SYMMETRIC: | |
| 54 return new SymmetricNAT(); | |
| 55 default: | |
| 56 RTC_NOTREACHED(); | |
| 57 return 0; | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 } // namespace rtc | |
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