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      1 /*
      2  * libjingle
      3  * Copyright 2013, Google Inc.
      4  *
      5  * Redistribution and use in source and binary forms, with or without
      6  * modification, are permitted provided that the following conditions are met:
      7  *
      8  *  1. Redistributions of source code must retain the above copyright notice,
      9  *     this list of conditions and the following disclaimer.
     10  *  2. Redistributions in binary form must reproduce the above copyright notice,
     11  *     this list of conditions and the following disclaimer in the documentation
     12  *     and/or other materials provided with the distribution.
     13  *  3. The name of the author may not be used to endorse or promote products
     14  *     derived from this software without specific prior written permission.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
     17  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
     18  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
     19  * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
     20  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
     22  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
     23  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
     24  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
     25  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "talk/app/webrtc/datachannel.h"
     29 
     30 class FakeDataChannelProvider : public webrtc::DataChannelProviderInterface {
     31  public:
     32   FakeDataChannelProvider()
     33       : send_blocked_(false),
     34         transport_available_(false),
     35         ready_to_send_(false),
     36         transport_error_(false) {}
     37   virtual ~FakeDataChannelProvider() {}
     38 
     39   virtual bool SendData(const cricket::SendDataParams& params,
     40                         const rtc::Buffer& payload,
     41                         cricket::SendDataResult* result) OVERRIDE {
     42     ASSERT(ready_to_send_ && transport_available_);
     43     if (send_blocked_) {
     44       *result = cricket::SDR_BLOCK;
     45       return false;
     46     }
     47 
     48     if (transport_error_ || payload.length() == 0) {
     49       *result = cricket::SDR_ERROR;
     50       return false;
     51     }
     52 
     53     last_send_data_params_ = params;
     54     return true;
     55   }
     56 
     57   virtual bool ConnectDataChannel(webrtc::DataChannel* data_channel) OVERRIDE {
     58     ASSERT(connected_channels_.find(data_channel) == connected_channels_.end());
     59     if (!transport_available_) {
     60       return false;
     61     }
     62     LOG(LS_INFO) << "DataChannel connected " << data_channel;
     63     connected_channels_.insert(data_channel);
     64     return true;
     65   }
     66 
     67   virtual void DisconnectDataChannel(
     68       webrtc::DataChannel* data_channel) OVERRIDE {
     69     ASSERT(connected_channels_.find(data_channel) != connected_channels_.end());
     70     LOG(LS_INFO) << "DataChannel disconnected " << data_channel;
     71     connected_channels_.erase(data_channel);
     72   }
     73 
     74   virtual void AddSctpDataStream(uint32 sid) OVERRIDE {
     75     if (!transport_available_) {
     76       return;
     77     }
     78     send_ssrcs_.insert(sid);
     79     recv_ssrcs_.insert(sid);
     80   }
     81 
     82   virtual void RemoveSctpDataStream(uint32 sid) OVERRIDE {
     83     send_ssrcs_.erase(sid);
     84     recv_ssrcs_.erase(sid);
     85   }
     86 
     87   virtual bool ReadyToSendData() const OVERRIDE {
     88     return ready_to_send_;
     89   }
     90 
     91   // Set true to emulate the SCTP stream being blocked by congestion control.
     92   void set_send_blocked(bool blocked) {
     93     send_blocked_ = blocked;
     94     if (!blocked) {
     95       std::set<webrtc::DataChannel*>::iterator it;
     96       for (it = connected_channels_.begin();
     97            it != connected_channels_.end();
     98            ++it) {
     99         (*it)->OnChannelReady(true);
    100       }
    101     }
    102   }
    103 
    104   // Set true to emulate the transport channel creation, e.g. after
    105   // setLocalDescription/setRemoteDescription called with data content.
    106   void set_transport_available(bool available) {
    107     transport_available_ = available;
    108   }
    109 
    110   // Set true to emulate the transport ReadyToSendData signal when the transport
    111   // becomes writable for the first time.
    112   void set_ready_to_send(bool ready) {
    113     ASSERT(transport_available_);
    114     ready_to_send_ = ready;
    115     if (ready) {
    116       std::set<webrtc::DataChannel*>::iterator it;
    117       for (it = connected_channels_.begin();
    118            it != connected_channels_.end();
    119            ++it) {
    120         (*it)->OnChannelReady(true);
    121       }
    122     }
    123   }
    124 
    125   void set_transport_error() {
    126     transport_error_ = true;
    127   }
    128 
    129   cricket::SendDataParams last_send_data_params() const {
    130     return last_send_data_params_;
    131   }
    132 
    133   bool IsConnected(webrtc::DataChannel* data_channel) const {
    134     return connected_channels_.find(data_channel) != connected_channels_.end();
    135   }
    136 
    137   bool IsSendStreamAdded(uint32 stream) const {
    138     return send_ssrcs_.find(stream) != send_ssrcs_.end();
    139   }
    140 
    141   bool IsRecvStreamAdded(uint32 stream) const {
    142     return recv_ssrcs_.find(stream) != recv_ssrcs_.end();
    143   }
    144 
    145  private:
    146   cricket::SendDataParams last_send_data_params_;
    147   bool send_blocked_;
    148   bool transport_available_;
    149   bool ready_to_send_;
    150   bool transport_error_;
    151   std::set<webrtc::DataChannel*> connected_channels_;
    152   std::set<uint32> send_ssrcs_;
    153   std::set<uint32> recv_ssrcs_;
    154 };
    155