Resolve addresses of STUN/Relay servers in JingleInfoRequest.

remoting/jingle_glue/jingle_info_request.h

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef REMOTING_JINGLE_GLUE_JINGLE_INFO_REQUEST_H_
 #define REMOTING_JINGLE_GLUE_JINGLE_INFO_REQUEST_H_
 
+#include <set>
 #include <string>
 #include <vector>
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
+#include "third_party/libjingle/source/talk/base/sigslot.h"
 
 class Task;
 
 namespace buzz {
 class XmlElement;
 }  // namespace buzz
 
 namespace talk_base {
 class SocketAddress;
 }  // namespace talk_base
 
 namespace remoting {
 
 class IqRequest;
+class HostResolver;
+class HostResolverFactory;
 
 // JingleInfoRequest handles requesting STUN/Relay infromation from
 // the Google Talk network. The query is made when Send() is
 // called. The callback given to Send() is called when response to the
 // request is received.
 //
 // This class is not threadsafe and should be used on the same thread it is
 // created on.
 //
 // TODO(ajwong): Add support for a timeout.
-class JingleInfoRequest {
+class JingleInfoRequest : public sigslot::has_slots<> {
  public:
   // Callback to receive the Jingle configuration settings.  The argumetns are
   // passed by pointer so the receive may call swap on them.  The receiver does
   // NOT own the arguments, which are guaranteed only to be alive for the
   // duration of the callback.
   typedef base::Callback<void (
       const std::string&, const std::vector<std::string>&,
       const std::vector<talk_base::SocketAddress>&)> OnJingleInfoCallback;
 
-  explicit JingleInfoRequest(IqRequest* request);
-  ~JingleInfoRequest();
+  explicit JingleInfoRequest(IqRequest* request,
+                             HostResolverFactory* host_resolver_factory);
+  virtual ~JingleInfoRequest();
 
   void Send(const OnJingleInfoCallback& callback);
 
  private:
+  struct PendingDnsRequest;
+
   void OnResponse(const buzz::XmlElement* stanza);
+  void OnStunAddressResponse(HostResolver* resolver,
+                             const talk_base::SocketAddress& address);
 
+  HostResolverFactory* host_resolver_factory_;
   scoped_ptr<IqRequest> request_;
   OnJingleInfoCallback on_jingle_info_cb_;
 
+  std::vector<std::string> relay_hosts_;
+  std::vector<talk_base::SocketAddress> stun_hosts_;
+  std::string relay_token_;
+
+  std::set<HostResolver*> stun_dns_requests_;
+
   DISALLOW_COPY_AND_ASSIGN(JingleInfoRequest);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_JINGLE_GLUE_JINGLE_INFO_REQUEST_H_