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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 TALK_P2P_BASE_TRANSPORTCHANNELIMPL_H_
#define TALK_P2P_BASE_TRANSPORTCHANNELIMPL_H_
#include <string>
#include "talk/p2p/base/transport.h"
#include "talk/p2p/base/transportchannel.h"
namespace buzz { class XmlElement; }
namespace cricket {
class Candidate;
// Base class for real implementations of TransportChannel. This includes some
// methods called only by Transport, which do not need to be exposed to the
// client.
class TransportChannelImpl : public TransportChannel {
public:
explicit TransportChannelImpl(const std::string& content_name, int component)
: TransportChannel(content_name, component) {}
// Returns the transport that created this channel.
virtual Transport* GetTransport() = 0;
// For ICE channels.
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;
// SetIceCredentials only need to be implemented by the ICE
// transport channels. Non-ICE transport channels can just ignore.
// The ufrag and pwd should be set before the Connect() is called.
virtual void SetIceCredentials(const std::string& ice_ufrag,
const std::string& ice_pwd) = 0;
// SetRemoteIceCredentials only need to be implemented by the ICE
// transport channels. Non-ICE transport channels can just ignore.
virtual void SetRemoteIceCredentials(const std::string& ice_ufrag,
const std::string& ice_pwd) = 0;
// SetRemoteIceMode must be implemented only by the ICE transport channels.
virtual void SetRemoteIceMode(IceMode mode) = 0;
// Begins the process of attempting to make a connection to the other client.
virtual void Connect() = 0;
// Resets this channel back to the initial state (i.e., not connecting).
virtual void Reset() = 0;
// Allows an individual channel to request signaling and be notified when it
// is ready. This is useful if the individual named channels have need to
// send their own transport-info stanzas.
sigslot::signal1<TransportChannelImpl*> SignalRequestSignaling;
virtual void OnSignalingReady() = 0;
// Handles sending and receiving of candidates. The Transport
// receives the candidates and may forward them to the relevant
// channel.
//
// Note: Since candidates are delivered asynchronously to the
// channel, they cannot return an error if the message is invalid.
// It is assumed that the Transport will have checked validity
// before forwarding.
sigslot::signal2<TransportChannelImpl*,
const Candidate&> SignalCandidateReady;
virtual void OnCandidate(const Candidate& candidate) = 0;
// DTLS methods
// Set DTLS local identity. The identity object is not copied, but the caller
// retains ownership and must delete it after this TransportChannelImpl is
// destroyed.
// TODO(bemasc): Fix the ownership semantics of this method.
virtual bool SetLocalIdentity(rtc::SSLIdentity* identity) = 0;
// Set DTLS Remote fingerprint. Must be after local identity set.
virtual bool SetRemoteFingerprint(const std::string& digest_alg,
const uint8* digest,
size_t digest_len) = 0;
virtual bool SetSslRole(rtc::SSLRole role) = 0;
// TransportChannel is forwarding this signal from PortAllocatorSession.
sigslot::signal1<TransportChannelImpl*> SignalCandidatesAllocationDone;
// Invoked when there is conflict in the ICE role between local and remote
// agents.
sigslot::signal1<TransportChannelImpl*> SignalRoleConflict;
// Emitted whenever the number of connections available to the transport
// channel decreases.
sigslot::signal1<TransportChannelImpl*> SignalConnectionRemoved;
private:
DISALLOW_EVIL_CONSTRUCTORS(TransportChannelImpl);
};
} // namespace cricket
#endif // TALK_P2P_BASE_TRANSPORTCHANNELIMPL_H_
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