media/mtransport/transportlayerice.cpp
author Simon Whitehead <chemnova@gmail.com>
Sat, 13 May 2017 15:12:15 -0500
changeset 358329 633151f5d481d49bd39900d43e6a75d77459a7bb
parent 293297 2377dfe9e73cf6754c3ae1296869a4d31232ef79
child 387242 03bb347a9e4ddc0d7a9cd375ff67fe372ba349a6
permissions -rw-r--r--
servo: Merge #16829 - Disallow negative duration for animation and transition (from hiikezoe:disallow-negative-duration); r=emilio <!-- Please describe your changes on the following line: --> --- <!-- Thank you for contributing to Servo! Please replace each `[ ]` by `[X]` when the step is complete, and replace `__` with appropriate data: --> - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #15343 <!-- Either: --> - [X] There are tests for these changes written by @simon-whitehead . Thank you! <!-- Also, please make sure that "Allow edits from maintainers" checkbox is checked, so that we can help you if you get stuck somewhere along the way.--> <!-- Pull requests that do not address these steps are welcome, but they will require additional verification as part of the review process. --> Source-Repo: https://github.com/servo/servo Source-Revision: 4613c0382ab76263fb8202ccf52f4c0520e44809

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

// Original author: ekr@rtfm.com

// Some of this code is cut-and-pasted from nICEr. Copyright is:

/*
Copyright (c) 2007, Adobe Systems, Incorporated
All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:

* Redistributions of source code must retain the above copyright
  notice, this list of conditions and the following disclaimer.

* 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.

* Neither the name of Adobe Systems, Network Resonance nor the names of its
  contributors may be used to endorse or promote products derived from
  this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"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 COPYRIGHT
OWNER OR CONTRIBUTORS 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.
*/


#include <string>
#include <vector>

#include "nsCOMPtr.h"
#include "nsComponentManagerUtils.h"
#include "nsError.h"
#include "nsIEventTarget.h"
#include "nsNetCID.h"
#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"

// nICEr includes
extern "C" {
#include "nr_api.h"
#include "registry.h"
#include "async_timer.h"
#include "ice_util.h"
#include "transport_addr.h"
#include "nr_crypto.h"
#include "nr_socket.h"
#include "nr_socket_local.h"
#include "stun_client_ctx.h"
#include "stun_server_ctx.h"
#include "ice_ctx.h"
#include "ice_candidate.h"
#include "ice_handler.h"
}

// Local includes
#include "logging.h"
#include "nricectx.h"
#include "nricemediastream.h"
#include "transportflow.h"
#include "transportlayerice.h"

namespace mozilla {

#ifdef ERROR
#undef ERROR
#endif

MOZ_MTLOG_MODULE("mtransport")

TransportLayerIce::TransportLayerIce(const std::string& name)
    : name_(name),
      ctx_(nullptr), stream_(nullptr), component_(0),
      old_stream_(nullptr)
{
  // setup happens later
}

TransportLayerIce::~TransportLayerIce() {
  // No need to do anything here, since we use smart pointers
}

void TransportLayerIce::SetParameters(RefPtr<NrIceCtx> ctx,
                                      RefPtr<NrIceMediaStream> stream,
                                      int component) {
  // If SetParameters is called and we already have a stream_, this means
  // we're handling an ICE restart.  We need to hold the old stream until
  // we know the new stream is working.
  if (stream_ && !old_stream_ && (stream_ != stream)) {
    // Here we leave the old stream's signals connected until we don't need
    // it anymore.  They will be disconnected if ice restart is successful.
    old_stream_ = stream_;
    MOZ_MTLOG(ML_INFO, LAYER_INFO << "SetParameters save old stream("
                                  << old_stream_->name() << ")");
  }

  ctx_ = ctx;
  stream_ = stream;
  component_ = component;

  PostSetup();
}

void TransportLayerIce::PostSetup() {
  target_ = ctx_->thread();

  stream_->SignalReady.connect(this, &TransportLayerIce::IceReady);
  stream_->SignalFailed.connect(this, &TransportLayerIce::IceFailed);
  stream_->SignalPacketReceived.connect(this,
                                        &TransportLayerIce::IcePacketReceived);
  if (stream_->state() == NrIceMediaStream::ICE_OPEN) {
    TL_SET_STATE(TS_OPEN);
  }
}

void TransportLayerIce::ResetOldStream() {
  if (old_stream_ == nullptr) {
    return; // no work to do
  }
  // ICE restart successful on the new stream, we can forget the old stream now
  MOZ_MTLOG(ML_INFO, LAYER_INFO << "ResetOldStream(" << old_stream_->name()
                                << ")");
  old_stream_->SignalReady.disconnect(this);
  old_stream_->SignalFailed.disconnect(this);
  old_stream_->SignalPacketReceived.disconnect(this);
  old_stream_ = nullptr;
}

void TransportLayerIce::RestoreOldStream() {
  if (old_stream_ == nullptr) {
    return; // no work to do
  }
  // ICE restart rollback, we need to restore the old stream
  MOZ_MTLOG(ML_INFO, LAYER_INFO << "RestoreOldStream(" << old_stream_->name()
                                << ")");
  stream_->SignalReady.disconnect(this);
  stream_->SignalFailed.disconnect(this);
  stream_->SignalPacketReceived.disconnect(this);
  stream_ = old_stream_;
  old_stream_ = nullptr;

  if (stream_->state() == NrIceMediaStream::ICE_OPEN) {
    IceReady(stream_);
  } else if (stream_->state() == NrIceMediaStream::ICE_CLOSED) {
    IceFailed(stream_);
  }
  // No events are fired when the stream is ICE_CONNECTING.  If the
  // restored stream is ICE_CONNECTING, IceReady/IceFailed will fire
  // later.
}

TransportResult TransportLayerIce::SendPacket(const unsigned char *data,
                                              size_t len) {
  CheckThread();
  // use old_stream_ until stream_ is ready
  nsresult res = (old_stream_?old_stream_:stream_)->SendPacket(component_,
                                                               data,
                                                               len);

  if (!NS_SUCCEEDED(res)) {
    return (res == NS_BASE_STREAM_WOULD_BLOCK) ?
        TE_WOULDBLOCK : TE_ERROR;
  }

  MOZ_MTLOG(ML_DEBUG, LAYER_INFO << " SendPacket(" << len << ") succeeded");

  return len;
}


void TransportLayerIce::IceCandidate(NrIceMediaStream *stream,
                                     const std::string&) {
  // NO-OP for now
}

void TransportLayerIce::IceReady(NrIceMediaStream *stream) {
  CheckThread();
  // only handle the current stream (not the old stream during restart)
  if (stream != stream_) {
    return;
  }
  MOZ_MTLOG(ML_INFO, LAYER_INFO << "ICE Ready(" << stream->name() << ","
    << component_ << ")");
  TL_SET_STATE(TS_OPEN);
}

void TransportLayerIce::IceFailed(NrIceMediaStream *stream) {
  CheckThread();
  // only handle the current stream (not the old stream during restart)
  if (stream != stream_) {
    return;
  }
  MOZ_MTLOG(ML_INFO, LAYER_INFO << "ICE Failed(" << stream->name() << ","
    << component_ << ")");
  TL_SET_STATE(TS_ERROR);
}

void TransportLayerIce::IcePacketReceived(NrIceMediaStream *stream, int component,
                       const unsigned char *data, int len) {
  CheckThread();
  // We get packets for both components, so ignore the ones that aren't
  // for us.
  if (component_ != component)
    return;

  MOZ_MTLOG(ML_DEBUG, LAYER_INFO << "PacketReceived(" << stream->name() << ","
    << component << "," << len << ")");
  SignalPacketReceived(this, data, len);
}

}  // close namespace