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| 1 /* | 1 /* |
| 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. | 2 * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 * | 3 * |
| 4 * Use of this source code is governed by a BSD-style license | 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 | 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 | 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ | 9 */ |
| 10 | 10 |
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| 39 // Used to indicate channel's connection state. | 39 // Used to indicate channel's connection state. |
| 40 enum TransportChannelState { STATE_CONNECTING, STATE_COMPLETED, STATE_FAILED }; | 40 enum TransportChannelState { STATE_CONNECTING, STATE_COMPLETED, STATE_FAILED }; |
| 41 | 41 |
| 42 // A TransportChannel represents one logical stream of packets that are sent | 42 // A TransportChannel represents one logical stream of packets that are sent |
| 43 // between the two sides of a session. | 43 // between the two sides of a session. |
| 44 class TransportChannel : public sigslot::has_slots<> { | 44 class TransportChannel : public sigslot::has_slots<> { |
| 45 public: | 45 public: |
| 46 explicit TransportChannel(const std::string& content_name, int component) | 46 explicit TransportChannel(const std::string& content_name, int component) |
| 47 : content_name_(content_name), | 47 : content_name_(content_name), |
| 48 component_(component), | 48 component_(component), |
| 49 readable_(false), writable_(false), receiving_(false) {} | 49 writable_(false), |
| 50 receiving_(false) {} |
| 50 virtual ~TransportChannel() {} | 51 virtual ~TransportChannel() {} |
| 51 | 52 |
| 52 // TODO(guoweis) - Make this pure virtual once all subclasses of | 53 // TODO(guoweis) - Make this pure virtual once all subclasses of |
| 53 // TransportChannel have this defined. | 54 // TransportChannel have this defined. |
| 54 virtual TransportChannelState GetState() const { | 55 virtual TransportChannelState GetState() const { |
| 55 return TransportChannelState::STATE_CONNECTING; | 56 return TransportChannelState::STATE_CONNECTING; |
| 56 } | 57 } |
| 57 | 58 |
| 58 // TODO(mallinath) - Remove this API, as it's no longer useful. | 59 // TODO(mallinath) - Remove this API, as it's no longer useful. |
| 59 // Returns the session id of this channel. | 60 // Returns the session id of this channel. |
| 60 virtual const std::string SessionId() const { return std::string(); } | 61 virtual const std::string SessionId() const { return std::string(); } |
| 61 | 62 |
| 62 const std::string& content_name() const { return content_name_; } | 63 const std::string& content_name() const { return content_name_; } |
| 63 int component() const { return component_; } | 64 int component() const { return component_; } |
| 64 | 65 |
| 65 // Returns the readable and states of this channel. Each time one of these | 66 // Returns the states of this channel. Each time one of these states changes, |
| 66 // states changes, a signal is raised. These states are aggregated by the | 67 // a signal is raised. These states are aggregated by the TransportManager. |
| 67 // TransportManager. | |
| 68 bool readable() const { return readable_; } | |
| 69 bool writable() const { return writable_; } | 68 bool writable() const { return writable_; } |
| 70 bool receiving() const { return receiving_; } | 69 bool receiving() const { return receiving_; } |
| 71 sigslot::signal1<TransportChannel*> SignalReadableState; | |
| 72 sigslot::signal1<TransportChannel*> SignalWritableState; | 70 sigslot::signal1<TransportChannel*> SignalWritableState; |
| 73 // Emitted when the TransportChannel's ability to send has changed. | 71 // Emitted when the TransportChannel's ability to send has changed. |
| 74 sigslot::signal1<TransportChannel*> SignalReadyToSend; | 72 sigslot::signal1<TransportChannel*> SignalReadyToSend; |
| 75 sigslot::signal1<TransportChannel*> SignalReceivingState; | 73 sigslot::signal1<TransportChannel*> SignalReceivingState; |
| 76 | 74 |
| 77 // Attempts to send the given packet. The return value is < 0 on failure. | 75 // Attempts to send the given packet. The return value is < 0 on failure. |
| 78 // TODO: Remove the default argument once channel code is updated. | 76 // TODO: Remove the default argument once channel code is updated. |
| 79 virtual int SendPacket(const char* data, size_t len, | 77 virtual int SendPacket(const char* data, size_t len, |
| 80 const rtc::PacketOptions& options, | 78 const rtc::PacketOptions& options, |
| 81 int flags = 0) = 0; | 79 int flags = 0) = 0; |
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| 132 // indicates where and how we are currently sending media. | 130 // indicates where and how we are currently sending media. |
| 133 sigslot::signal2<TransportChannel*, const Candidate&> SignalRouteChange; | 131 sigslot::signal2<TransportChannel*, const Candidate&> SignalRouteChange; |
| 134 | 132 |
| 135 // Invoked when the channel is being destroyed. | 133 // Invoked when the channel is being destroyed. |
| 136 sigslot::signal1<TransportChannel*> SignalDestroyed; | 134 sigslot::signal1<TransportChannel*> SignalDestroyed; |
| 137 | 135 |
| 138 // Debugging description of this transport channel. | 136 // Debugging description of this transport channel. |
| 139 std::string ToString() const; | 137 std::string ToString() const; |
| 140 | 138 |
| 141 protected: | 139 protected: |
| 142 // Sets the readable state, signaling if necessary. | |
| 143 void set_readable(bool readable); | |
| 144 | 140 |
| 145 // Sets the writable state, signaling if necessary. | 141 // Sets the writable state, signaling if necessary. |
| 146 void set_writable(bool writable); | 142 void set_writable(bool writable); |
| 147 | 143 |
| 148 // Sets the receiving state, signaling if necessary. | 144 // Sets the receiving state, signaling if necessary. |
| 149 void set_receiving(bool receiving); | 145 void set_receiving(bool receiving); |
| 150 | 146 |
| 151 | 147 |
| 152 private: | 148 private: |
| 153 // Used mostly for debugging. | 149 // Used mostly for debugging. |
| 154 std::string content_name_; | 150 std::string content_name_; |
| 155 int component_; | 151 int component_; |
| 156 bool readable_; | |
| 157 bool writable_; | 152 bool writable_; |
| 158 bool receiving_; | 153 bool receiving_; |
| 159 | 154 |
| 160 RTC_DISALLOW_COPY_AND_ASSIGN(TransportChannel); | 155 RTC_DISALLOW_COPY_AND_ASSIGN(TransportChannel); |
| 161 }; | 156 }; |
| 162 | 157 |
| 163 } // namespace cricket | 158 } // namespace cricket |
| 164 | 159 |
| 165 #endif // WEBRTC_P2P_BASE_TRANSPORTCHANNEL_H_ | 160 #endif // WEBRTC_P2P_BASE_TRANSPORTCHANNEL_H_ |
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