Home | History | Annotate | Download | only in client 
      1 /*
      2  * libjingle
      3  * Copyright 2011, 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 PEERCONNECTION_SAMPLES_CLIENT_PEER_CONNECTION_CLIENT_H_
     29 #define PEERCONNECTION_SAMPLES_CLIENT_PEER_CONNECTION_CLIENT_H_
     30 #pragma once
     31 
     32 #include <map>
     33 #include <string>
     34 
     35 #include "talk/base/nethelpers.h"
     36 #include "talk/base/signalthread.h"
     37 #include "talk/base/sigslot.h"
     38 #include "talk/base/physicalsocketserver.h"
     39 #include "talk/base/scoped_ptr.h"
     40 
     41 typedef std::map<int, std::string> Peers;
     42 
     43 struct PeerConnectionClientObserver {
     44   virtual void OnSignedIn() = 0;  // Called when we're logged on.
     45   virtual void OnDisconnected() = 0;
     46   virtual void OnPeerConnected(int id, const std::string& name) = 0;
     47   virtual void OnPeerDisconnected(int peer_id) = 0;
     48   virtual void OnMessageFromPeer(int peer_id, const std::string& message) = 0;
     49   virtual void OnMessageSent(int err) = 0;
     50   virtual void OnServerConnectionFailure() = 0;
     51 
     52  protected:
     53   virtual ~PeerConnectionClientObserver() {}
     54 };
     55 
     56 class PeerConnectionClient : public sigslot::has_slots<>,
     57                              public talk_base::MessageHandler {
     58  public:
     59   enum State {
     60     NOT_CONNECTED,
     61     RESOLVING,
     62     SIGNING_IN,
     63     CONNECTED,
     64     SIGNING_OUT_WAITING,
     65     SIGNING_OUT,
     66   };
     67 
     68   PeerConnectionClient();
     69   ~PeerConnectionClient();
     70 
     71   int id() const;
     72   bool is_connected() const;
     73   const Peers& peers() const;
     74 
     75   void RegisterObserver(PeerConnectionClientObserver* callback);
     76 
     77   void Connect(const std::string& server, int port,
     78                const std::string& client_name);
     79 
     80   bool SendToPeer(int peer_id, const std::string& message);
     81   bool SendHangUp(int peer_id);
     82   bool IsSendingMessage();
     83 
     84   bool SignOut();
     85 
     86   // implements the MessageHandler interface
     87   void OnMessage(talk_base::Message* msg);
     88 
     89  protected:
     90   void DoConnect();
     91   void Close();
     92   void InitSocketSignals();
     93   bool ConnectControlSocket();
     94   void OnConnect(talk_base::AsyncSocket* socket);
     95   void OnHangingGetConnect(talk_base::AsyncSocket* socket);
     96   void OnMessageFromPeer(int peer_id, const std::string& message);
     97 
     98   // Quick and dirty support for parsing HTTP header values.
     99   bool GetHeaderValue(const std::string& data, size_t eoh,
    100                       const char* header_pattern, size_t* value);
    101 
    102   bool GetHeaderValue(const std::string& data, size_t eoh,
    103                       const char* header_pattern, std::string* value);
    104 
    105   // Returns true if the whole response has been read.
    106   bool ReadIntoBuffer(talk_base::AsyncSocket* socket, std::string* data,
    107                       size_t* content_length);
    108 
    109   void OnRead(talk_base::AsyncSocket* socket);
    110 
    111   void OnHangingGetRead(talk_base::AsyncSocket* socket);
    112 
    113   // Parses a single line entry in the form "<name>,<id>,<connected>"
    114   bool ParseEntry(const std::string& entry, std::string* name, int* id,
    115                   bool* connected);
    116 
    117   int GetResponseStatus(const std::string& response);
    118 
    119   bool ParseServerResponse(const std::string& response, size_t content_length,
    120                            size_t* peer_id, size_t* eoh);
    121 
    122   void OnClose(talk_base::AsyncSocket* socket, int err);
    123 
    124   void OnResolveResult(talk_base::AsyncResolverInterface* resolver);
    125 
    126   PeerConnectionClientObserver* callback_;
    127   talk_base::SocketAddress server_address_;
    128   talk_base::AsyncResolver* resolver_;
    129   talk_base::scoped_ptr<talk_base::AsyncSocket> control_socket_;
    130   talk_base::scoped_ptr<talk_base::AsyncSocket> hanging_get_;
    131   std::string onconnect_data_;
    132   std::string control_data_;
    133   std::string notification_data_;
    134   std::string client_name_;
    135   Peers peers_;
    136   State state_;
    137   int my_id_;
    138 };
    139 
    140 #endif  // PEERCONNECTION_SAMPLES_CLIENT_PEER_CONNECTION_CLIENT_H_
    141