Redo the change of https://webrtc-codereview.appspot.com/30949004/

The previous change causes a build issue as there is subclass of TransportChannel in chromium. To break the circular dependency, a stub of implementation for GetState() is provided and will be removed once the jingle_glue::MockTransportChannel has the function defined.

TBR=pthatcher@webrtc.org

BUG=411086

Review URL: https://webrtc-codereview.appspot.com/34369004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7806 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/p2p/base/dtlstransportchannel.h

@@ -109,9 +109,6 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   virtual IceRole GetIceRole() const {
     return channel_->GetIceRole();
   }
-  virtual size_t GetConnectionCount() const {
-    return channel_->GetConnectionCount();
-  }
   virtual bool SetLocalIdentity(rtc::SSLIdentity *identity);
   virtual bool GetLocalIdentity(rtc::SSLIdentity** identity) const;
 
@@ -175,6 +172,10 @@ class DtlsTransportChannelWrapper : public TransportChannelImpl {
   virtual Transport* GetTransport() {
     return transport_;
   }
+
+  virtual TransportChannelState GetState() const {
+    return channel_->GetState();
+  }
   virtual void SetIceTiebreaker(uint64 tiebreaker) {
     channel_->SetIceTiebreaker(tiebreaker);
   }

webrtc/p2p/base/fakesession.h

@@ -82,9 +82,20 @@ class FakeTransportChannel : public TransportChannelImpl,
     return transport_;
   }
 
+  virtual TransportChannelState GetState() const {
+    if (connection_count_ == 0) {
+      return TransportChannelState::STATE_FAILED;
+    }
+
+    if (connection_count_ == 1) {
+      return TransportChannelState::STATE_COMPLETED;
+    }
+
+    return TransportChannelState::STATE_FAILED;
+  }
+
   virtual void SetIceRole(IceRole role) { role_ = role; }
   virtual IceRole GetIceRole() const { return role_; }
-  virtual size_t GetConnectionCount() const { return connection_count_; }
   virtual void SetIceTiebreaker(uint64 tiebreaker) { tiebreaker_ = tiebreaker; }
   virtual bool GetIceProtocolType(IceProtocolType* type) const {
     *type = ice_proto_;

webrtc/p2p/base/p2ptransportchannel.cc

@@ -226,6 +226,36 @@ void P2PTransportChannel::SetIceTiebreaker(uint64 tiebreaker) {
   tiebreaker_ = tiebreaker;
 }
 
+// Currently a channel is considered ICE completed once there is no
+// more than one connection per Network. This works for a single NIC
+// with both IPv4 and IPv6 enabled. However, this condition won't
+// happen when there are multiple NICs and all of them have
+// connectivity.
+// TODO(guoweis): Change Completion to be driven by a channel level
+// timer.
+TransportChannelState P2PTransportChannel::GetState() const {
+  std::set<rtc::Network*> networks;
+
+  if (connections_.size() == 0) {
+    return TransportChannelState::STATE_FAILED;
+  }
+
+  for (uint32 i = 0; i < connections_.size(); ++i) {
+    rtc::Network* network = connections_[i]->port()->Network();
+    if (networks.find(network) == networks.end()) {
+      networks.insert(network);
+    } else {
+      LOG_J(LS_VERBOSE, this) << "Ice not completed yet for this channel as "
+                              << network->ToString()
+                              << " has more than 1 connection.";
+      return TransportChannelState::STATE_CONNECTING;
+    }
+  }
+  LOG_J(LS_VERBOSE, this) << "Ice is completed for this channel.";
+
+  return TransportChannelState::STATE_COMPLETED;
+}
+
 bool P2PTransportChannel::GetIceProtocolType(IceProtocolType* type) const {
   *type = protocol_type_;
   return true;
@@ -1065,7 +1095,7 @@ void P2PTransportChannel::HandleAllTimedOut() {
 // If we have a best connection, return it, otherwise return top one in the
 // list (later we will mark it best).
 Connection* P2PTransportChannel::GetBestConnectionOnNetwork(
-    rtc::Network* network) {
+    rtc::Network* network) const {
   // If the best connection is on this network, then it wins.
   if (best_connection_ && (best_connection_->port()->Network() == network))
     return best_connection_;

webrtc/p2p/base/p2ptransportchannel.h

@@ -59,10 +59,10 @@ class P2PTransportChannel : public TransportChannelImpl,
 
   // From TransportChannelImpl:
   virtual Transport* GetTransport() { return transport_; }
+  virtual TransportChannelState GetState() const;
   virtual void SetIceRole(IceRole role);
   virtual IceRole GetIceRole() const { return ice_role_; }
   virtual void SetIceTiebreaker(uint64 tiebreaker);
-  virtual size_t GetConnectionCount() const { return connections_.size(); }
   virtual bool GetIceProtocolType(IceProtocolType* type) const;
   virtual void SetIceProtocolType(IceProtocolType type);
   virtual void SetIceCredentials(const std::string& ice_ufrag,
@@ -164,7 +164,7 @@ class P2PTransportChannel : public TransportChannelImpl,
   void HandleNotWritable();
   void HandleAllTimedOut();
 
-  Connection* GetBestConnectionOnNetwork(rtc::Network* network);
+  Connection* GetBestConnectionOnNetwork(rtc::Network* network) const;
   bool CreateConnections(const Candidate &remote_candidate,
                          PortInterface* origin_port, bool readable);
   bool CreateConnection(PortInterface* port, const Candidate& remote_candidate,

webrtc/p2p/base/port.cc

@@ -927,7 +927,8 @@ void Connection::set_write_state(WriteState value) {
   WriteState old_value = write_state_;
   write_state_ = value;
   if (value != old_value) {
-    LOG_J(LS_VERBOSE, this) << "set_write_state";
+    LOG_J(LS_VERBOSE, this) << "set_write_state from: " << old_value << " to "
+                            << value;
     SignalStateChange(this);
     CheckTimeout();
   }
@@ -1102,8 +1103,10 @@ void Connection::UpdateState(uint32 now) {
         pings_since_last_response_[i]);
     pings.append(buf).append(" ");
   }
-  LOG_J(LS_VERBOSE, this) << "UpdateState(): pings_since_last_response_=" <<
-      pings << ", rtt=" << rtt << ", now=" << now;
+  LOG_J(LS_VERBOSE, this) << "UpdateState(): pings_since_last_response_="
+                          << pings << ", rtt=" << rtt << ", now=" << now
+                          << ", last ping received: " << last_ping_received_
+                          << ", last data_received: " << last_data_received_;
 
   // Check the readable state.
   //
@@ -1187,6 +1190,12 @@ void Connection::ReceivedPing() {
   set_read_state(STATE_READABLE);
 }
 
+std::string Connection::ToDebugId() const {
+  std::stringstream ss;
+  ss << std::hex << this;
+  return ss.str();
+}
+
 std::string Connection::ToString() const {
   const char CONNECT_STATE_ABBREV[2] = {
     '-',  // not connected (false)
@@ -1212,7 +1221,8 @@ std::string Connection::ToString() const {
   const Candidate& local = local_candidate();
   const Candidate& remote = remote_candidate();
   std::stringstream ss;
-  ss << "Conn[" << port_->content_name()
+  ss << "Conn[" << ToDebugId()
+     << ":" << port_->content_name()
      << ":" << local.id() << ":" << local.component()
      << ":" << local.generation()
      << ":" << local.type() << ":" << local.protocol()

webrtc/p2p/base/port.h

@@ -517,6 +517,7 @@ class Connection : public rtc::MessageHandler,
   void ReceivedPing();
 
   // Debugging description of this connection
+  std::string ToDebugId() const;
   std::string ToString() const;
   std::string ToSensitiveString() const;
 

webrtc/p2p/base/rawtransportchannel.h

@@ -54,6 +54,9 @@ class RawTransportChannel : public TransportChannelImpl,
 
   // Implements TransportChannelImpl.
   virtual Transport* GetTransport() { return raw_transport_; }
+  virtual TransportChannelState GetState() const {
+    return TransportChannelState::STATE_COMPLETED;
+  }
   virtual void SetIceCredentials(const std::string& ice_ufrag,
                                  const std::string& ice_pwd) {}
   virtual void SetRemoteIceCredentials(const std::string& ice_ufrag,

webrtc/p2p/base/transport.cc

@@ -669,8 +669,7 @@ void Transport::OnChannelConnectionRemoved(TransportChannelImpl* channel) {
     return;
   }
 
-  size_t connections = channel->GetConnectionCount();
-  if (connections == 0) {
+  if (channel->GetState() == TransportChannelState::STATE_FAILED) {
     // A Transport has failed if any of its channels have no remaining
     // connections.
     signaling_thread_->Post(this, MSG_FAILED);
@@ -680,6 +679,12 @@ void Transport::OnChannelConnectionRemoved(TransportChannelImpl* channel) {
 void Transport::MaybeCompleted_w() {
   ASSERT(worker_thread()->IsCurrent());
 
+  // When there is no channel created yet, calling this function could fire an
+  // IceConnectionCompleted event prematurely.
+  if (channels_.size() == 0) {
+    return;
+  }
+
   // A Transport's ICE process is completed if all of its channels are writable,
   // have finished allocating candidates, and have pruned all but one of their
   // connections.
@@ -687,7 +692,7 @@ void Transport::MaybeCompleted_w() {
   for (iter = channels_.begin(); iter != channels_.end(); ++iter) {
     const TransportChannelImpl* channel = iter->second.get();
     if (!(channel->writable() &&
-          channel->GetConnectionCount() == 1 &&
+          channel->GetState() == TransportChannelState::STATE_COMPLETED &&
           channel->GetIceRole() == ICEROLE_CONTROLLING &&
           iter->second.candidates_allocated())) {
       return;

webrtc/p2p/base/transportchannel.h

@@ -36,6 +36,9 @@ enum PacketFlags {
                            // crypto provided by the transport (e.g. DTLS)
 };
 
+// Used to indicate channel's connection state.
+enum TransportChannelState { STATE_CONNECTING, STATE_COMPLETED, STATE_FAILED };
+
 // A TransportChannel represents one logical stream of packets that are sent
 // between the two sides of a session.
 class TransportChannel : public sigslot::has_slots<> {
@@ -46,6 +49,12 @@ class TransportChannel : public sigslot::has_slots<> {
         readable_(false), writable_(false) {}
   virtual ~TransportChannel() {}
 
+  // TODO(guoweis) - Make this pure virtual once all subclasses of
+  // TransportChannel have this defined.
+  virtual TransportChannelState GetState() const {
+    return TransportChannelState::STATE_CONNECTING;
+  }
+
   // TODO(mallinath) - Remove this API, as it's no longer useful.
   // Returns the session id of this channel.
   virtual const std::string SessionId() const { return std::string(); }

webrtc/p2p/base/transportchannelimpl.h

@@ -36,7 +36,6 @@ class TransportChannelImpl : public TransportChannel {
   virtual IceRole GetIceRole() const = 0;
   virtual void SetIceRole(IceRole role) = 0;
   virtual void SetIceTiebreaker(uint64 tiebreaker) = 0;
-  virtual size_t GetConnectionCount() const = 0;
   // To toggle G-ICE/ICE.
   virtual bool GetIceProtocolType(IceProtocolType* type) const = 0;
   virtual void SetIceProtocolType(IceProtocolType type) = 0;

webrtc/p2p/base/transportchannelproxy.cc

@@ -111,6 +111,14 @@ int TransportChannelProxy::GetError() {
   return impl_->GetError();
 }
 
+TransportChannelState TransportChannelProxy::GetState() const {
+  ASSERT(rtc::Thread::Current() == worker_thread_);
+  if (!impl_) {
+    return TransportChannelState::STATE_CONNECTING;
+  }
+  return impl_->GetState();
+}
+
 bool TransportChannelProxy::GetStats(ConnectionInfos* infos) {
   ASSERT(rtc::Thread::Current() == worker_thread_);
   if (!impl_) {

webrtc/p2p/base/transportchannelproxy.h

@@ -41,6 +41,8 @@ class TransportChannelProxy : public TransportChannel,
   const std::string& name() const { return name_; }
   TransportChannelImpl* impl() { return impl_; }
 
+  virtual TransportChannelState GetState() const;
+
   // Sets the implementation to which we will proxy.
   void SetImplementation(TransportChannelImpl* impl);