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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 #ifndef TALK_APP_WEBRTC_TEST_FAKEDATACHANNELPROVIDER_H_
     29 #define TALK_APP_WEBRTC_TEST_FAKEDATACHANNELPROVIDER_H_
     30 
     31 #include "talk/app/webrtc/datachannel.h"
     32 
     33 class FakeDataChannelProvider : public webrtc::DataChannelProviderInterface {
     34  public:
     35   FakeDataChannelProvider()
     36       : send_blocked_(false),
     37         transport_available_(false),
     38         ready_to_send_(false),
     39         transport_error_(false) {}
     40   virtual ~FakeDataChannelProvider() {}
     41 
     42   bool SendData(const cricket::SendDataParams& params,
     43                 const rtc::Buffer& payload,
     44                 cricket::SendDataResult* result) override {
     45     ASSERT(ready_to_send_ && transport_available_);
     46     if (send_blocked_) {
     47       *result = cricket::SDR_BLOCK;
     48       return false;
     49     }
     50 
     51     if (transport_error_ || payload.size() == 0) {
     52       *result = cricket::SDR_ERROR;
     53       return false;
     54     }
     55 
     56     last_send_data_params_ = params;
     57     return true;
     58   }
     59 
     60   bool ConnectDataChannel(webrtc::DataChannel* data_channel) override {
     61     ASSERT(connected_channels_.find(data_channel) == connected_channels_.end());
     62     if (!transport_available_) {
     63       return false;
     64     }
     65     LOG(LS_INFO) << "DataChannel connected " << data_channel;
     66     connected_channels_.insert(data_channel);
     67     return true;
     68   }
     69 
     70   void DisconnectDataChannel(webrtc::DataChannel* data_channel) override {
     71     ASSERT(connected_channels_.find(data_channel) != connected_channels_.end());
     72     LOG(LS_INFO) << "DataChannel disconnected " << data_channel;
     73     connected_channels_.erase(data_channel);
     74   }
     75 
     76   void AddSctpDataStream(int sid) override {
     77     ASSERT(sid >= 0);
     78     if (!transport_available_) {
     79       return;
     80     }
     81     send_ssrcs_.insert(sid);
     82     recv_ssrcs_.insert(sid);
     83   }
     84 
     85   void RemoveSctpDataStream(int sid) override {
     86     ASSERT(sid >= 0);
     87     send_ssrcs_.erase(sid);
     88     recv_ssrcs_.erase(sid);
     89   }
     90 
     91   bool ReadyToSendData() const override { return ready_to_send_; }
     92 
     93   // Set true to emulate the SCTP stream being blocked by congestion control.
     94   void set_send_blocked(bool blocked) {
     95     send_blocked_ = blocked;
     96     if (!blocked) {
     97       // Take a snapshot of the connected channels and check to see whether
     98       // each value is still in connected_channels_ before calling
     99       // OnChannelReady().  This avoids problems where the set gets modified
    100       // in response to OnChannelReady().
    101       for (webrtc::DataChannel *ch : std::set<webrtc::DataChannel*>(
    102                connected_channels_.begin(), connected_channels_.end())) {
    103         if (connected_channels_.count(ch)) {
    104           ch->OnChannelReady(true);
    105         }
    106       }
    107     }
    108   }
    109 
    110   // Set true to emulate the transport channel creation, e.g. after
    111   // setLocalDescription/setRemoteDescription called with data content.
    112   void set_transport_available(bool available) {
    113     transport_available_ = available;
    114   }
    115 
    116   // Set true to emulate the transport ReadyToSendData signal when the transport
    117   // becomes writable for the first time.
    118   void set_ready_to_send(bool ready) {
    119     ASSERT(transport_available_);
    120     ready_to_send_ = ready;
    121     if (ready) {
    122       std::set<webrtc::DataChannel*>::iterator it;
    123       for (it = connected_channels_.begin();
    124            it != connected_channels_.end();
    125            ++it) {
    126         (*it)->OnChannelReady(true);
    127       }
    128     }
    129   }
    130 
    131   void set_transport_error() {
    132     transport_error_ = true;
    133   }
    134 
    135   cricket::SendDataParams last_send_data_params() const {
    136     return last_send_data_params_;
    137   }
    138 
    139   bool IsConnected(webrtc::DataChannel* data_channel) const {
    140     return connected_channels_.find(data_channel) != connected_channels_.end();
    141   }
    142 
    143   bool IsSendStreamAdded(uint32_t stream) const {
    144     return send_ssrcs_.find(stream) != send_ssrcs_.end();
    145   }
    146 
    147   bool IsRecvStreamAdded(uint32_t stream) const {
    148     return recv_ssrcs_.find(stream) != recv_ssrcs_.end();
    149   }
    150 
    151  private:
    152   cricket::SendDataParams last_send_data_params_;
    153   bool send_blocked_;
    154   bool transport_available_;
    155   bool ready_to_send_;
    156   bool transport_error_;
    157   std::set<webrtc::DataChannel*> connected_channels_;
    158   std::set<uint32_t> send_ssrcs_;
    159   std::set<uint32_t> recv_ssrcs_;
    160 };
    161 #endif  // TALK_APP_WEBRTC_TEST_FAKEDATACHANNELPROVIDER_H_
    162