a09a99950e
git-svn-id: http://webrtc.googlecode.com/svn/trunk@6891 4adac7df-926f-26a2-2b94-8c16560cd09d
134 lines
4.4 KiB
C++
134 lines
4.4 KiB
C++
/*
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* libjingle
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* Copyright 2004--2005, Google Inc.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef TALK_P2P_BASE_STUNREQUEST_H_
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#define TALK_P2P_BASE_STUNREQUEST_H_
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#include <map>
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#include <string>
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#include "talk/p2p/base/stun.h"
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#include "webrtc/base/sigslot.h"
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#include "webrtc/base/thread.h"
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namespace cricket {
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class StunRequest;
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// Manages a set of STUN requests, sending and resending until we receive a
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// response or determine that the request has timed out.
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class StunRequestManager {
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public:
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StunRequestManager(rtc::Thread* thread);
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~StunRequestManager();
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// Starts sending the given request (perhaps after a delay).
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void Send(StunRequest* request);
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void SendDelayed(StunRequest* request, int delay);
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// Removes a stun request that was added previously. This will happen
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// automatically when a request succeeds, fails, or times out.
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void Remove(StunRequest* request);
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// Removes all stun requests that were added previously.
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void Clear();
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// Determines whether the given message is a response to one of the
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// outstanding requests, and if so, processes it appropriately.
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bool CheckResponse(StunMessage* msg);
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bool CheckResponse(const char* data, size_t size);
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bool empty() { return requests_.empty(); }
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// Raised when there are bytes to be sent.
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sigslot::signal3<const void*, size_t, StunRequest*> SignalSendPacket;
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private:
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typedef std::map<std::string, StunRequest*> RequestMap;
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rtc::Thread* thread_;
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RequestMap requests_;
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friend class StunRequest;
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};
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// Represents an individual request to be sent. The STUN message can either be
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// constructed beforehand or built on demand.
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class StunRequest : public rtc::MessageHandler {
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public:
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StunRequest();
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StunRequest(StunMessage* request);
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virtual ~StunRequest();
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// Causes our wrapped StunMessage to be Prepared
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void Construct();
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// The manager handling this request (if it has been scheduled for sending).
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StunRequestManager* manager() { return manager_; }
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// Returns the transaction ID of this request.
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const std::string& id() { return msg_->transaction_id(); }
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// Returns the STUN type of the request message.
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int type();
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// Returns a const pointer to |msg_|.
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const StunMessage* msg() const;
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// Time elapsed since last send (in ms)
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uint32 Elapsed() const;
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protected:
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int count_;
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bool timeout_;
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// Fills in a request object to be sent. Note that request's transaction ID
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// will already be set and cannot be changed.
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virtual void Prepare(StunMessage* request) {}
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// Called when the message receives a response or times out.
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virtual void OnResponse(StunMessage* response) {}
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virtual void OnErrorResponse(StunMessage* response) {}
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virtual void OnTimeout() {}
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virtual int GetNextDelay();
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private:
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void set_manager(StunRequestManager* manager);
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// Handles messages for sending and timeout.
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void OnMessage(rtc::Message* pmsg);
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StunRequestManager* manager_;
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StunMessage* msg_;
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uint32 tstamp_;
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friend class StunRequestManager;
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};
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} // namespace cricket
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#endif // TALK_P2P_BASE_STUNREQUEST_H_
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