Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 511 insertions, 0 deletions

diff --git a/dom/base/nsDOMDataChannel.cpp b/dom/base/nsDOMDataChannel.cpp
new file mode 100644
index 0000000000..250cc36cf5
--- /dev/null
+++ b/dom/base/nsDOMDataChannel.cpp
@@ -0,0 +1,511 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=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/. */
+
+#include "nsDOMDataChannel.h"
+
+#include "base/basictypes.h"
+#include "mozilla/Logging.h"
+
+#include "nsDOMDataChannelDeclarations.h"
+#include "nsDOMDataChannel.h"
+#include "mozilla/DOMEventTargetHelper.h"
+#include "mozilla/EventListenerManager.h"
+#include "mozilla/dom/File.h"
+#include "mozilla/dom/MessageEvent.h"
+#include "mozilla/dom/MessageEventBinding.h"
+#include "mozilla/dom/ScriptSettings.h"
+#include "mozilla/dom/ToJSValue.h"
+#include "mozilla/dom/Blob.h"
+
+#include "nsError.h"
+#include "nsContentUtils.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsIScriptContext.h"
+#include "nsIScriptObjectPrincipal.h"
+#include "nsProxyRelease.h"
+
+#include "DataChannel.h"
+#include "DataChannelLog.h"
+
+// Since we've moved the windows.h include down here, we have to explicitly
+// undef GetBinaryType, otherwise we'll get really odd conflicts
+#ifdef GetBinaryType
+#  undef GetBinaryType
+#endif
+
+using namespace mozilla;
+using namespace mozilla::dom;
+
+nsDOMDataChannel::~nsDOMDataChannel() {
+  // Don't call us anymore!  Likely isn't an issue (or maybe just less of
+  // one) once we block GC until all the (appropriate) onXxxx handlers
+  // are dropped. (See WebRTC spec)
+  DC_DEBUG(("%p: Close()ing %p", this, mDataChannel.get()));
+  mDataChannel->SetListener(nullptr, nullptr);
+  mDataChannel->Close();
+}
+
+/* virtual */
+JSObject* nsDOMDataChannel::WrapObject(JSContext* aCx,
+                                       JS::Handle<JSObject*> aGivenProto) {
+  return RTCDataChannel_Binding::Wrap(aCx, this, aGivenProto);
+}
+
+NS_IMPL_CYCLE_COLLECTION_CLASS(nsDOMDataChannel)
+
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(nsDOMDataChannel,
+                                                  DOMEventTargetHelper)
+NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
+
+NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(nsDOMDataChannel,
+                                                DOMEventTargetHelper)
+NS_IMPL_CYCLE_COLLECTION_UNLINK_END
+
+NS_IMPL_ADDREF_INHERITED(nsDOMDataChannel, DOMEventTargetHelper)
+NS_IMPL_RELEASE_INHERITED(nsDOMDataChannel, DOMEventTargetHelper)
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsDOMDataChannel)
+NS_INTERFACE_MAP_END_INHERITING(DOMEventTargetHelper)
+
+nsDOMDataChannel::nsDOMDataChannel(
+    already_AddRefed<mozilla::DataChannel>& aDataChannel,
+    nsPIDOMWindowInner* aWindow)
+    : DOMEventTargetHelper(aWindow),
+      mDataChannel(aDataChannel),
+      mBinaryType(DC_BINARY_TYPE_BLOB),
+      mCheckMustKeepAlive(true),
+      mSentClose(false) {}
+
+nsresult nsDOMDataChannel::Init(nsPIDOMWindowInner* aDOMWindow) {
+  nsresult rv;
+  nsAutoString urlParam;
+
+  MOZ_ASSERT(mDataChannel);
+  mDataChannel->SetListener(this, nullptr);
+
+  // Now grovel through the objects to get a usable origin for onMessage
+  nsCOMPtr<nsIScriptGlobalObject> sgo = do_QueryInterface(aDOMWindow);
+  NS_ENSURE_STATE(sgo);
+  nsCOMPtr<nsIScriptContext> scriptContext = sgo->GetContext();
+  NS_ENSURE_STATE(scriptContext);
+
+  nsCOMPtr<nsIScriptObjectPrincipal> scriptPrincipal(
+      do_QueryInterface(aDOMWindow));
+  NS_ENSURE_STATE(scriptPrincipal);
+  nsCOMPtr<nsIPrincipal> principal = scriptPrincipal->GetPrincipal();
+  NS_ENSURE_STATE(principal);
+
+  // Attempt to kill "ghost" DataChannel (if one can happen): but usually too
+  // early for check to fail
+  rv = CheckCurrentGlobalCorrectness();
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  rv = nsContentUtils::GetUTFOrigin(principal, mOrigin);
+  DC_DEBUG(("%s: origin = %s\n", __FUNCTION__,
+            NS_LossyConvertUTF16toASCII(mOrigin).get()));
+  return rv;
+}
+
+// Most of the GetFoo()/SetFoo()s don't need to touch shared resources and
+// are safe after Close()
+void nsDOMDataChannel::GetLabel(nsAString& aLabel) {
+  mDataChannel->GetLabel(aLabel);
+}
+
+void nsDOMDataChannel::GetProtocol(nsAString& aProtocol) {
+  mDataChannel->GetProtocol(aProtocol);
+}
+
+mozilla::dom::Nullable<uint16_t> nsDOMDataChannel::GetId() const {
+  mozilla::dom::Nullable<uint16_t> result = mDataChannel->GetStream();
+  if (result.Value() == 65535) {
+    result.SetNull();
+  }
+  return result;
+}
+
+// XXX should be GetType()?  Open question for the spec
+bool nsDOMDataChannel::Reliable() const {
+  return mDataChannel->GetType() == mozilla::DataChannelConnection::RELIABLE;
+}
+
+mozilla::dom::Nullable<uint16_t> nsDOMDataChannel::GetMaxPacketLifeTime()
+    const {
+  return mDataChannel->GetMaxPacketLifeTime();
+}
+
+mozilla::dom::Nullable<uint16_t> nsDOMDataChannel::GetMaxRetransmits() const {
+  return mDataChannel->GetMaxRetransmits();
+}
+
+bool nsDOMDataChannel::Negotiated() const {
+  return mDataChannel->GetNegotiated();
+}
+
+bool nsDOMDataChannel::Ordered() const { return mDataChannel->GetOrdered(); }
+
+RTCDataChannelState nsDOMDataChannel::ReadyState() const {
+  return static_cast<RTCDataChannelState>(mDataChannel->GetReadyState());
+}
+
+uint32_t nsDOMDataChannel::BufferedAmount() const {
+  if (!mSentClose) {
+    return mDataChannel->GetBufferedAmount();
+  }
+  return 0;
+}
+
+uint32_t nsDOMDataChannel::BufferedAmountLowThreshold() const {
+  return mDataChannel->GetBufferedAmountLowThreshold();
+}
+
+void nsDOMDataChannel::SetBufferedAmountLowThreshold(uint32_t aThreshold) {
+  mDataChannel->SetBufferedAmountLowThreshold(aThreshold);
+}
+
+void nsDOMDataChannel::Close() {
+  mDataChannel->Close();
+  UpdateMustKeepAlive();
+}
+
+// All of the following is copy/pasted from WebSocket.cpp.
+void nsDOMDataChannel::Send(const nsAString& aData, ErrorResult& aRv) {
+  nsAutoCString msgString;
+  if (!AppendUTF16toUTF8(aData, msgString, mozilla::fallible_t())) {
+    aRv.Throw(NS_ERROR_FILE_TOO_BIG);
+    return;
+  }
+  Send(nullptr, &msgString, false, aRv);
+}
+
+void nsDOMDataChannel::Send(Blob& aData, ErrorResult& aRv) {
+  MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
+
+  nsCOMPtr<nsIInputStream> msgStream;
+  aData.CreateInputStream(getter_AddRefs(msgStream), aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  uint64_t msgLength = aData.GetSize(aRv);
+  if (NS_WARN_IF(aRv.Failed())) {
+    return;
+  }
+
+  if (msgLength > UINT32_MAX) {
+    aRv.Throw(NS_ERROR_FILE_TOO_BIG);
+    return;
+  }
+
+  Send(&aData, nullptr, true, aRv);
+}
+
+void nsDOMDataChannel::Send(const ArrayBuffer& aData, ErrorResult& aRv) {
+  MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
+
+  aData.ComputeState();
+
+  static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
+
+  uint32_t len = aData.Length();
+  char* data = reinterpret_cast<char*>(aData.Data());
+
+  nsDependentCSubstring msgString;
+  if (!msgString.Assign(data, len, mozilla::fallible_t())) {
+    aRv.Throw(NS_ERROR_FILE_TOO_BIG);
+    return;
+  }
+
+  Send(nullptr, &msgString, true, aRv);
+}
+
+void nsDOMDataChannel::Send(const ArrayBufferView& aData, ErrorResult& aRv) {
+  MOZ_ASSERT(NS_IsMainThread(), "Not running on main thread");
+
+  aData.ComputeState();
+
+  static_assert(sizeof(*aData.Data()) == 1, "byte-sized data required");
+
+  uint32_t len = aData.Length();
+  char* data = reinterpret_cast<char*>(aData.Data());
+
+  nsDependentCSubstring msgString;
+  if (!msgString.Assign(data, len, mozilla::fallible_t())) {
+    aRv.Throw(NS_ERROR_FILE_TOO_BIG);
+    return;
+  }
+
+  Send(nullptr, &msgString, true, aRv);
+}
+
+void nsDOMDataChannel::Send(mozilla::dom::Blob* aMsgBlob,
+                            const nsACString* aMsgString, bool aIsBinary,
+                            mozilla::ErrorResult& aRv) {
+  MOZ_ASSERT(NS_IsMainThread());
+  uint16_t state = mozilla::DataChannel::CLOSED;
+  if (!mSentClose) {
+    state = mDataChannel->GetReadyState();
+  }
+
+  // In reality, the DataChannel protocol allows this, but we want it to
+  // look like WebSockets
+  if (state == mozilla::DataChannel::CONNECTING) {
+    aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
+    return;
+  }
+
+  if (state == mozilla::DataChannel::CLOSING ||
+      state == mozilla::DataChannel::CLOSED) {
+    return;
+  }
+
+  MOZ_ASSERT(state == mozilla::DataChannel::OPEN,
+             "Unknown state in nsDOMDataChannel::Send");
+
+  if (aMsgBlob) {
+    mDataChannel->SendBinaryBlob(*aMsgBlob, aRv);
+  } else {
+    if (aIsBinary) {
+      mDataChannel->SendBinaryMsg(*aMsgString, aRv);
+    } else {
+      mDataChannel->SendMsg(*aMsgString, aRv);
+    }
+  }
+}
+
+nsresult nsDOMDataChannel::DoOnMessageAvailable(const nsACString& aData,
+                                                bool aBinary) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  DC_VERBOSE((
+      "DoOnMessageAvailable%s\n",
+      aBinary ? ((mBinaryType == DC_BINARY_TYPE_BLOB) ? " (blob)" : " (binary)")
+              : ""));
+
+  nsresult rv = CheckCurrentGlobalCorrectness();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+
+  AutoJSAPI jsapi;
+  if (NS_WARN_IF(!jsapi.Init(GetOwner()))) {
+    return NS_ERROR_FAILURE;
+  }
+  JSContext* cx = jsapi.cx();
+
+  JS::Rooted<JS::Value> jsData(cx);
+
+  if (aBinary) {
+    if (mBinaryType == DC_BINARY_TYPE_BLOB) {
+      RefPtr<Blob> blob =
+          Blob::CreateStringBlob(GetOwnerGlobal(), aData, u""_ns);
+      if (NS_WARN_IF(!blob)) {
+        return NS_ERROR_FAILURE;
+      }
+
+      if (!ToJSValue(cx, blob, &jsData)) {
+        return NS_ERROR_FAILURE;
+      }
+    } else if (mBinaryType == DC_BINARY_TYPE_ARRAYBUFFER) {
+      JS::Rooted<JSObject*> arrayBuf(cx);
+      rv = nsContentUtils::CreateArrayBuffer(cx, aData, arrayBuf.address());
+      NS_ENSURE_SUCCESS(rv, rv);
+      jsData.setObject(*arrayBuf);
+    } else {
+      MOZ_CRASH("Unknown binary type!");
+      return NS_ERROR_UNEXPECTED;
+    }
+  } else {
+    NS_ConvertUTF8toUTF16 utf16data(aData);
+    JSString* jsString =
+        JS_NewUCStringCopyN(cx, utf16data.get(), utf16data.Length());
+    NS_ENSURE_TRUE(jsString, NS_ERROR_FAILURE);
+
+    jsData.setString(jsString);
+  }
+
+  RefPtr<MessageEvent> event = new MessageEvent(this, nullptr, nullptr);
+
+  event->InitMessageEvent(nullptr, u"message"_ns, CanBubble::eNo,
+                          Cancelable::eNo, jsData, mOrigin, u""_ns, nullptr,
+                          Sequence<OwningNonNull<MessagePort>>());
+  event->SetTrusted(true);
+
+  DC_DEBUG(
+      ("%p(%p): %s - Dispatching\n", this, (void*)mDataChannel, __FUNCTION__));
+  ErrorResult err;
+  DispatchEvent(*event, err);
+  if (err.Failed()) {
+    DC_ERROR(("%p(%p): %s - Failed to dispatch message", this,
+              (void*)mDataChannel, __FUNCTION__));
+    NS_WARNING("Failed to dispatch the message event!!!");
+  }
+  return err.StealNSResult();
+}
+
+nsresult nsDOMDataChannel::OnMessageAvailable(nsISupports* aContext,
+                                              const nsACString& aMessage) {
+  MOZ_ASSERT(NS_IsMainThread());
+  return DoOnMessageAvailable(aMessage, false);
+}
+
+nsresult nsDOMDataChannel::OnBinaryMessageAvailable(
+    nsISupports* aContext, const nsACString& aMessage) {
+  MOZ_ASSERT(NS_IsMainThread());
+  return DoOnMessageAvailable(aMessage, true);
+}
+
+nsresult nsDOMDataChannel::OnSimpleEvent(nsISupports* aContext,
+                                         const nsAString& aName) {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  nsresult rv = CheckCurrentGlobalCorrectness();
+  if (NS_FAILED(rv)) {
+    return NS_OK;
+  }
+
+  RefPtr<Event> event = NS_NewDOMEvent(this, nullptr, nullptr);
+
+  event->InitEvent(aName, CanBubble::eNo, Cancelable::eNo);
+  event->SetTrusted(true);
+
+  ErrorResult err;
+  DispatchEvent(*event, err);
+  return err.StealNSResult();
+}
+
+nsresult nsDOMDataChannel::OnChannelConnected(nsISupports* aContext) {
+  DC_DEBUG(
+      ("%p(%p): %s - Dispatching\n", this, (void*)mDataChannel, __FUNCTION__));
+
+  return OnSimpleEvent(aContext, u"open"_ns);
+}
+
+nsresult nsDOMDataChannel::OnChannelClosed(nsISupports* aContext) {
+  nsresult rv;
+  // so we don't have to worry if we're notified from different paths in
+  // the underlying code
+  if (!mSentClose) {
+    // Ok, we're done with it.
+    mDataChannel->ReleaseConnection();
+    DC_DEBUG(("%p(%p): %s - Dispatching\n", this, (void*)mDataChannel,
+              __FUNCTION__));
+
+    rv = OnSimpleEvent(aContext, u"close"_ns);
+    // no more events can happen
+    mSentClose = true;
+  } else {
+    rv = NS_OK;
+  }
+  DontKeepAliveAnyMore();
+  return rv;
+}
+
+nsresult nsDOMDataChannel::OnBufferLow(nsISupports* aContext) {
+  DC_DEBUG(
+      ("%p(%p): %s - Dispatching\n", this, (void*)mDataChannel, __FUNCTION__));
+
+  return OnSimpleEvent(aContext, u"bufferedamountlow"_ns);
+}
+
+nsresult nsDOMDataChannel::NotBuffered(nsISupports* aContext) {
+  // In the rare case that we held off GC to let the buffer drain
+  UpdateMustKeepAlive();
+  return NS_OK;
+}
+
+//-----------------------------------------------------------------------------
+// Methods that keep alive the DataChannel object when:
+//   1. the object has registered event listeners that can be triggered
+//      ("strong event listeners");
+//   2. there are outgoing not sent messages.
+//-----------------------------------------------------------------------------
+
+void nsDOMDataChannel::UpdateMustKeepAlive() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!mCheckMustKeepAlive) {
+    return;
+  }
+
+  bool shouldKeepAlive = false;
+  uint16_t readyState = mDataChannel->GetReadyState();
+
+  switch (readyState) {
+    case DataChannel::CONNECTING: {
+      if (mListenerManager &&
+          (mListenerManager->HasListenersFor(nsGkAtoms::onopen) ||
+           mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
+           mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
+           mListenerManager->HasListenersFor(nsGkAtoms::onbufferedamountlow) ||
+           mListenerManager->HasListenersFor(nsGkAtoms::onclose))) {
+        shouldKeepAlive = true;
+      }
+    } break;
+
+    case DataChannel::OPEN:
+    case DataChannel::CLOSING: {
+      if (mDataChannel->GetBufferedAmount() != 0 ||
+          (mListenerManager &&
+           (mListenerManager->HasListenersFor(nsGkAtoms::onmessage) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onerror) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onbufferedamountlow) ||
+            mListenerManager->HasListenersFor(nsGkAtoms::onclose)))) {
+        shouldKeepAlive = true;
+      }
+    } break;
+
+    case DataChannel::CLOSED: {
+      shouldKeepAlive = false;
+    }
+  }
+
+  if (mSelfRef && !shouldKeepAlive) {
+    ReleaseSelf();
+  } else if (!mSelfRef && shouldKeepAlive) {
+    mSelfRef = this;
+  }
+}
+
+void nsDOMDataChannel::DontKeepAliveAnyMore() {
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (mSelfRef) {
+    // Since we're on MainThread, force an eventloop trip to avoid deleting
+    // ourselves.
+    ReleaseSelf();
+  }
+
+  mCheckMustKeepAlive = false;
+}
+
+void nsDOMDataChannel::ReleaseSelf() {
+  // release our self-reference (safely) by putting it in an event (always)
+  NS_ReleaseOnMainThread("nsDOMDataChannel::mSelfRef", mSelfRef.forget(), true);
+}
+
+void nsDOMDataChannel::EventListenerAdded(nsAtom* aType) {
+  MOZ_ASSERT(NS_IsMainThread());
+  UpdateMustKeepAlive();
+}
+
+void nsDOMDataChannel::EventListenerRemoved(nsAtom* aType) {
+  MOZ_ASSERT(NS_IsMainThread());
+  UpdateMustKeepAlive();
+}
+
+/* static */
+nsresult NS_NewDOMDataChannel(
+    already_AddRefed<mozilla::DataChannel>&& aDataChannel,
+    nsPIDOMWindowInner* aWindow, nsDOMDataChannel** aDomDataChannel) {
+  RefPtr<nsDOMDataChannel> domdc = new nsDOMDataChannel(aDataChannel, aWindow);
+
+  nsresult rv = domdc->Init(aWindow);
+  NS_ENSURE_SUCCESS(rv, rv);
+
+  domdc.forget(aDomDataChannel);
+  return NS_OK;
+}