henrike@webrtc.org | 47be73b | 2014-05-13 18:00:26 | [diff] [blame] | 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 | |
Henrik Kjellander | fb3e1b6 | 2017-06-29 06:03:04 | [diff] [blame] | 11 | #ifndef WEBRTC_RTC_BASE_NATTYPES_H_ |
| 12 | #define WEBRTC_RTC_BASE_NATTYPES_H_ |
henrike@webrtc.org | 47be73b | 2014-05-13 18:00:26 | [diff] [blame] | 13 | |
Henrik Kjellander | 88b2dd4 | 2017-06-29 05:52:50 | [diff] [blame] | 14 | namespace rtc { |
henrike@webrtc.org | 47be73b | 2014-05-13 18:00:26 | [diff] [blame] | 15 | |
Henrik Kjellander | 88b2dd4 | 2017-06-29 05:52:50 | [diff] [blame] | 16 | /* Identifies each type of NAT that can be simulated. */ |
| 17 | enum NATType { |
| 18 | NAT_OPEN_CONE, |
| 19 | NAT_ADDR_RESTRICTED, |
| 20 | NAT_PORT_RESTRICTED, |
| 21 | NAT_SYMMETRIC |
| 22 | }; |
henrike@webrtc.org | 47be73b | 2014-05-13 18:00:26 | [diff] [blame] | 23 | |
Henrik Kjellander | 88b2dd4 | 2017-06-29 05:52:50 | [diff] [blame] | 24 | // Implements the rules for each specific type of NAT. |
| 25 | class NAT { |
| 26 | public: |
| 27 | virtual ~NAT() { } |
| 28 | |
| 29 | // Determines whether this NAT uses both source and destination address when |
| 30 | // checking whether a mapping already exists. |
| 31 | virtual bool IsSymmetric() = 0; |
| 32 | |
| 33 | // Determines whether this NAT drops packets received from a different IP |
| 34 | // the one last sent to. |
| 35 | virtual bool FiltersIP() = 0; |
| 36 | |
| 37 | // Determines whether this NAT drops packets received from a different port |
| 38 | // the one last sent to. |
| 39 | virtual bool FiltersPort() = 0; |
| 40 | |
| 41 | // Returns an implementation of the given type of NAT. |
| 42 | static NAT* Create(NATType type); |
| 43 | }; |
| 44 | |
| 45 | } // namespace rtc |
| 46 | |
Henrik Kjellander | fb3e1b6 | 2017-06-29 06:03:04 | [diff] [blame] | 47 | #endif // WEBRTC_RTC_BASE_NATTYPES_H_ |