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/*
* libjingle
* Copyright 2004--2005, Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _BASICPORTALLOCATOR_H_
#define _BASICPORTALLOCATOR_H_
#include "talk/base/thread.h"
#include "talk/base/messagequeue.h"
#include "talk/base/network.h"
#include "talk/p2p/base/portallocator.h"
#include <string>
#include <vector>
namespace cricket {
class BasicPortAllocator: public PortAllocator {
public:
BasicPortAllocator(NetworkManager* network_manager);
BasicPortAllocator(NetworkManager* network_manager, SocketAddress *stun_server, SocketAddress *relay_server);
virtual ~BasicPortAllocator();
NetworkManager* network_manager() { return network_manager_; }
// Returns the best (highest preference) phase that has produced a port that
// produced a writable connection. If no writable connections have been
// produced, this returns -1.
int best_writable_phase() const;
virtual PortAllocatorSession *CreateSession(const std::string &name);
// Called whenever a connection becomes writable with the argument being the
// phase that the corresponding port was created in.
void AddWritablePhase(int phase);
private:
NetworkManager* network_manager_;
SocketAddress* stun_address_;
SocketAddress* relay_address_;
int best_writable_phase_;
};
struct PortConfiguration;
class AllocationSequence;
class BasicPortAllocatorSession: public PortAllocatorSession, public MessageHandler {
public:
BasicPortAllocatorSession(BasicPortAllocator *allocator,
const std::string &name);
BasicPortAllocatorSession(BasicPortAllocator *allocator,
const std::string &name,
SocketAddress *stun_address,
SocketAddress *relay_address);
~BasicPortAllocatorSession();
BasicPortAllocator* allocator() { return allocator_; }
const std::string& name() const { return name_; }
Thread* network_thread() { return network_thread_; }
Thread* config_thread() { return config_thread_; }
void set_config_thread(Thread* thread) { config_thread_ = thread; }
virtual void GetInitialPorts();
virtual void StartGetAllPorts();
virtual void StopGetAllPorts();
virtual bool IsGettingAllPorts() { return running_; }
protected:
// Starts the process of getting the port configurations.
virtual void GetPortConfigurations();
// Adds a port configuration that is now ready. Once we have one for each
// network (or a timeout occurs), we will start allocating ports.
void ConfigReady(PortConfiguration* config);
// MessageHandler. Can be overriden if message IDs do not conflict.
virtual void OnMessage(Message *message);
private:
void OnConfigReady(PortConfiguration* config);
void OnConfigTimeout();
void AllocatePorts();
void OnAllocate();
bool HasEquivalentSequence(Network* network);
void AddAllocatedPort(Port* port, AllocationSequence * seq, float pref, bool prepare_address = true);
void OnAddressReady(Port *port);
void OnProtocolEnabled(AllocationSequence * seq, ProtocolType proto);
void OnPortDestroyed(Port* port);
void OnConnectionCreated(Port* port, Connection* conn);
void OnConnectionStateChange(Connection* conn);
void OnShake();
BasicPortAllocator *allocator_;
std::string name_;
Thread* network_thread_;
Thread* config_thread_;
bool configuration_done_;
bool allocation_started_;
bool running_; // set when StartGetAllPorts is called
std::vector<PortConfiguration*> configs_;
std::vector<AllocationSequence*> sequences_;
SocketAddress *stun_address_;
SocketAddress *relay_address_;
struct PortData {
Port * port;
AllocationSequence * sequence;
bool ready;
bool operator==(Port * rhs) const { return (port == rhs); }
};
std::vector<PortData> ports_;
friend class AllocationSequence;
};
// Records configuration information useful in creating ports.
struct PortConfiguration: public MessageData {
SocketAddress stun_address;
std::string username;
std::string password;
std::string magic_cookie;
typedef std::vector<ProtocolAddress> PortList;
struct RelayServer {
PortList ports;
float pref_modifier; // added to the protocol modifier to get the
// preference for this particular server
};
typedef std::vector<RelayServer> RelayList;
RelayList relays;
PortConfiguration(const SocketAddress& stun_address,
const std::string& username,
const std::string& password,
const std::string& magic_cookie);
// Adds another relay server, with the given ports and modifier, to the list.
void AddRelay(const PortList& ports, float pref_modifier);
// Determines whether the given relay server supports the given protocol.
static bool SupportsProtocol(const PortConfiguration::RelayServer& relay,
ProtocolType type);
};
} // namespace cricket
#endif // _BASICPORTALLOCATOR_H_
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