97077a3ab2
Update libyuv to r826. TEST=try bots R=niklas.enbom@webrtc.org Review URL: https://webrtc-codereview.appspot.com/2889004 git-svn-id: http://webrtc.googlecode.com/svn/trunk@5038 4adac7df-926f-26a2-2b94-8c16560cd09d
230 lines
9.3 KiB
C++
230 lines
9.3 KiB
C++
/*
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* libjingle SCTP
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* Copyright 2012 Google Inc, and Robin Seggelmann
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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_MEDIA_SCTP_SCTPDATAENGINE_H_
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#define TALK_MEDIA_SCTP_SCTPDATAENGINE_H_
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#include <errno.h>
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#include <string>
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#include <vector>
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namespace cricket {
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// Some ERRNO values get re-#defined to WSA* equivalents in some talk/
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// headers. We save the original ones in an enum.
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enum PreservedErrno {
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SCTP_EINPROGRESS = EINPROGRESS,
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SCTP_EWOULDBLOCK = EWOULDBLOCK
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};
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} // namespace cricket
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#include "talk/base/buffer.h"
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#include "talk/base/scoped_ptr.h"
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#include "talk/media/base/codec.h"
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#include "talk/media/base/mediachannel.h"
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#include "talk/media/base/mediaengine.h"
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// Defined by "usrsctplib/usrsctp.h"
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struct sockaddr_conn;
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struct sctp_assoc_change;
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// Defined by <sys/socket.h>
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struct socket;
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namespace cricket {
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// The highest stream ID (Sid) that SCTP allows, and the number of streams we
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// tell SCTP we're going to use.
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const uint32 kMaxSctpSid = 1023;
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// A DataEngine that interacts with usrsctp.
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//
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// From channel calls, data flows like this:
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// [worker thread (although it can in princple be another thread)]
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// 1. SctpDataMediaChannel::SendData(data)
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// 2. usrsctp_sendv(data)
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// [worker thread returns; sctp thread then calls the following]
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// 3. OnSctpOutboundPacket(wrapped_data)
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// [sctp thread returns having posted a message for the worker thread]
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// 4. SctpDataMediaChannel::OnMessage(wrapped_data)
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// 5. SctpDataMediaChannel::OnPacketFromSctpToNetwork(wrapped_data)
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// 6. NetworkInterface::SendPacket(wrapped_data)
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// 7. ... across network ... a packet is sent back ...
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// 8. SctpDataMediaChannel::OnPacketReceived(wrapped_data)
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// 9. usrsctp_conninput(wrapped_data)
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// [worker thread returns; sctp thread then calls the following]
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// 10. OnSctpInboundData(data)
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// [sctp thread returns having posted a message fot the worker thread]
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// 11. SctpDataMediaChannel::OnMessage(inboundpacket)
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// 12. SctpDataMediaChannel::OnInboundPacketFromSctpToChannel(inboundpacket)
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// 13. SctpDataMediaChannel::OnDataFromSctpToChannel(data)
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// 14. SctpDataMediaChannel::SignalDataReceived(data)
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// [from the same thread, methods registered/connected to
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// SctpDataMediaChannel are called with the recieved data]
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class SctpDataEngine : public DataEngineInterface {
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public:
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SctpDataEngine();
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virtual ~SctpDataEngine();
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virtual DataMediaChannel* CreateChannel(DataChannelType data_channel_type);
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virtual const std::vector<DataCodec>& data_codecs() { return codecs_; }
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private:
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static int usrsctp_engines_count;
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std::vector<DataCodec> codecs_;
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};
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// TODO(ldixon): Make into a special type of TypedMessageData.
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// Holds data to be passed on to a channel.
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struct SctpInboundPacket;
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class SctpDataMediaChannel : public DataMediaChannel,
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public talk_base::MessageHandler {
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public:
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// DataMessageType is used for the SCTP "Payload Protocol Identifier", as
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// defined in http://tools.ietf.org/html/rfc4960#section-14.4
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//
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// For the list of IANA approved values see:
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// http://www.iana.org/assignments/sctp-parameters/sctp-parameters.xml
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// The value is not used by SCTP itself. It indicates the protocol running
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// on top of SCTP.
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enum PayloadProtocolIdentifier {
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PPID_NONE = 0, // No protocol is specified.
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// Matches the PPIDs in mozilla source and
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// https://datatracker.ietf.org/doc/draft-ietf-rtcweb-data-protocol Sec. 9
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// They're not yet assigned by IANA.
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PPID_CONTROL = 50,
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PPID_BINARY_PARTIAL = 52,
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PPID_BINARY_LAST = 53,
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PPID_TEXT_PARTIAL = 54,
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PPID_TEXT_LAST = 51
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};
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// Given a thread which will be used to post messages (received data) to this
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// SctpDataMediaChannel instance.
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explicit SctpDataMediaChannel(talk_base::Thread* thread);
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virtual ~SctpDataMediaChannel();
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// When SetSend is set to true, connects. When set to false, disconnects.
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// Calling: "SetSend(true); SetSend(false); SetSend(true);" will connect,
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// disconnect, and reconnect.
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virtual bool SetSend(bool send);
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// Unless SetReceive(true) is called, received packets will be discarded.
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virtual bool SetReceive(bool receive);
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virtual bool AddSendStream(const StreamParams& sp);
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virtual bool RemoveSendStream(uint32 ssrc);
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virtual bool AddRecvStream(const StreamParams& sp);
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virtual bool RemoveRecvStream(uint32 ssrc);
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// Called when Sctp gets data. The data may be a notification or data for
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// OnSctpInboundData. Called from the worker thread.
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virtual void OnMessage(talk_base::Message* msg);
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// Send data down this channel (will be wrapped as SCTP packets then given to
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// sctp that will then post the network interface by OnMessage).
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// Returns true iff successful data somewhere on the send-queue/network.
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virtual bool SendData(const SendDataParams& params,
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const talk_base::Buffer& payload,
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SendDataResult* result = NULL);
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// A packet is received from the network interface. Posted to OnMessage.
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virtual void OnPacketReceived(talk_base::Buffer* packet);
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// Exposed to allow Post call from c-callbacks.
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talk_base::Thread* worker_thread() const { return worker_thread_; }
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// TODO(ldixon): add a DataOptions class to mediachannel.h
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virtual bool SetOptions(int options) { return false; }
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virtual int GetOptions() const { return 0; }
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// Many of these things are unused by SCTP, but are needed to fulfill
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// the MediaChannel interface.
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// TODO(pthatcher): Cleanup MediaChannel interface, or at least
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// don't try calling these and return false. Right now, things
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// don't work if we return false.
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virtual bool SetSendBandwidth(bool autobw, int bps) { return true; }
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virtual bool SetRecvRtpHeaderExtensions(
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const std::vector<RtpHeaderExtension>& extensions) { return true; }
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virtual bool SetSendRtpHeaderExtensions(
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const std::vector<RtpHeaderExtension>& extensions) { return true; }
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virtual bool SetSendCodecs(const std::vector<DataCodec>& codecs);
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virtual bool SetRecvCodecs(const std::vector<DataCodec>& codecs);
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virtual void OnRtcpReceived(talk_base::Buffer* packet) {}
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virtual void OnReadyToSend(bool ready) {}
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// Helper for debugging.
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void set_debug_name(const std::string& debug_name) {
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debug_name_ = debug_name;
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}
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const std::string& debug_name() const { return debug_name_; }
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private:
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sockaddr_conn GetSctpSockAddr(int port);
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// Creates the socket and connects. Sets sending_ to true.
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bool Connect();
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// Closes the socket. Sets sending_ to false.
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void Disconnect();
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// Returns false when openning the socket failed; when successfull sets
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// sending_ to true
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bool OpenSctpSocket();
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// Sets sending_ to false and sock_ to NULL.
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void CloseSctpSocket();
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// Called by OnMessage to send packet on the network.
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void OnPacketFromSctpToNetwork(talk_base::Buffer* buffer);
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// Called by OnMessage to decide what to do with the packet.
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void OnInboundPacketFromSctpToChannel(SctpInboundPacket* packet);
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void OnDataFromSctpToChannel(const ReceiveDataParams& params,
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talk_base::Buffer* buffer);
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void OnNotificationFromSctp(talk_base::Buffer* buffer);
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void OnNotificationAssocChange(const sctp_assoc_change& change);
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// Responsible for marshalling incoming data to the channels listeners, and
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// outgoing data to the network interface.
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talk_base::Thread* worker_thread_;
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// The local and remote SCTP port to use. These are passed along the wire
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// and the listener and connector must be using the same port. It is not
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// related to the ports at the IP level. If set to -1, we default to
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// kSctpDefaultPort.
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int local_port_;
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int remote_port_;
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struct socket* sock_; // The socket created by usrsctp_socket(...).
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// sending_ is true iff there is a connected socket.
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bool sending_;
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// receiving_ controls whether inbound packets are thrown away.
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bool receiving_;
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// Unified send/receive streams, as each is bidirectional.
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std::vector<StreamParams> streams_;
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// A human-readable name for debugging messages.
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std::string debug_name_;
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};
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} // namespace cricket
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#endif // TALK_MEDIA_SCTP_SCTPDATAENGINE_H_
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