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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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