gecko-dev/dom/presentation/PresentationSessionTranspor...

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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 "nsArrayUtils.h"
#include "nsIAsyncStreamCopier.h"
#include "nsIInputStreamPump.h"
#include "nsIMultiplexInputStream.h"
#include "nsIMutableArray.h"
#include "nsIOutputStream.h"
#include "nsIPresentationControlChannel.h"
#include "nsIScriptableInputStream.h"
#include "nsISocketTransport.h"
#include "nsISocketTransportService.h"
#include "nsISupportsPrimitives.h"
#include "nsNetUtil.h"
#include "nsServiceManagerUtils.h"
#include "nsStreamUtils.h"
#include "nsThreadUtils.h"
#include "PresentationSessionTransport.h"
#define BUFFER_SIZE 65536
using namespace mozilla;
using namespace mozilla::dom;
class CopierCallbacks final : public nsIRequestObserver
{
public:
explicit CopierCallbacks(PresentationSessionTransport* aTransport)
: mOwner(aTransport)
{}
NS_DECL_ISUPPORTS
NS_DECL_NSIREQUESTOBSERVER
private:
~CopierCallbacks() {}
RefPtr<PresentationSessionTransport> mOwner;
};
NS_IMPL_ISUPPORTS(CopierCallbacks, nsIRequestObserver)
NS_IMETHODIMP
CopierCallbacks::OnStartRequest(nsIRequest* aRequest, nsISupports* aContext)
{
return NS_OK;
}
NS_IMETHODIMP
CopierCallbacks::OnStopRequest(nsIRequest* aRequest, nsISupports* aContext, nsresult aStatus)
{
mOwner->NotifyCopyComplete(aStatus);
return NS_OK;
}
NS_IMPL_ISUPPORTS(PresentationSessionTransport,
nsIPresentationSessionTransport,
nsITransportEventSink,
nsIInputStreamCallback,
nsIStreamListener,
nsIRequestObserver)
PresentationSessionTransport::PresentationSessionTransport()
: mReadyState(CLOSED)
, mAsyncCopierActive(false)
, mCloseStatus(NS_OK)
, mDataNotificationEnabled(false)
{
}
PresentationSessionTransport::~PresentationSessionTransport()
{
}
NS_IMETHODIMP
PresentationSessionTransport::InitWithSocketTransport(nsISocketTransport* aTransport,
nsIPresentationSessionTransportCallback* aCallback)
{
if (NS_WARN_IF(!aCallback)) {
return NS_ERROR_INVALID_ARG;
}
mCallback = aCallback;
if (NS_WARN_IF(!aTransport)) {
return NS_ERROR_INVALID_ARG;
}
mTransport = aTransport;
nsresult rv = CreateStream();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
SetReadyState(OPEN);
if (IsReadyToNotifyData()) {
return CreateInputStreamPump();
}
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::InitWithChannelDescription(nsIPresentationChannelDescription* aDescription,
nsIPresentationSessionTransportCallback* aCallback)
{
if (NS_WARN_IF(!aCallback)) {
return NS_ERROR_INVALID_ARG;
}
mCallback = aCallback;
if (NS_WARN_IF(!aDescription)) {
return NS_ERROR_INVALID_ARG;
}
uint16_t serverPort;
nsresult rv = aDescription->GetTcpPort(&serverPort);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIArray> serverHosts;
rv = aDescription->GetTcpAddress(getter_AddRefs(serverHosts));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// TODO bug 1148307 Implement PresentationSessionTransport with DataChannel.
// Ultimately we may use all the available addresses. DataChannel appears
// more robust upon handling ICE. And at the first stage Presentation API is
// only exposed on Firefox OS where the first IP appears enough for most
// scenarios.
nsCOMPtr<nsISupportsCString> supportStr = do_QueryElementAt(serverHosts, 0);
if (NS_WARN_IF(!supportStr)) {
return NS_ERROR_INVALID_ARG;
}
nsAutoCString serverHost;
supportStr->GetData(serverHost);
if (serverHost.IsEmpty()) {
return NS_ERROR_INVALID_ARG;
}
SetReadyState(CONNECTING);
nsCOMPtr<nsISocketTransportService> sts =
do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID);
if (NS_WARN_IF(!sts)) {
return NS_ERROR_NOT_AVAILABLE;
}
rv = sts->CreateTransport(nullptr, 0, serverHost, serverPort, nullptr,
getter_AddRefs(mTransport));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsIThread> mainThread;
NS_GetMainThread(getter_AddRefs(mainThread));
mTransport->SetEventSink(this, mainThread);
rv = CreateStream();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
PresentationSessionTransport::CreateStream()
{
nsresult rv = mTransport->OpenInputStream(0, 0, 0, getter_AddRefs(mSocketInputStream));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = mTransport->OpenOutputStream(nsITransport::OPEN_UNBUFFERED, 0, 0, getter_AddRefs(mSocketOutputStream));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// If the other side is not listening, we will get an |onInputStreamReady|
// callback where |available| raises to indicate the connection was refused.
nsCOMPtr<nsIAsyncInputStream> asyncStream = do_QueryInterface(mSocketInputStream);
if (NS_WARN_IF(!asyncStream)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsCOMPtr<nsIThread> mainThread;
NS_GetMainThread(getter_AddRefs(mainThread));
rv = asyncStream->AsyncWait(this, nsIAsyncInputStream::WAIT_CLOSURE_ONLY, 0, mainThread);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mInputStreamScriptable = do_CreateInstance("@mozilla.org/scriptableinputstream;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = mInputStreamScriptable->Init(mSocketInputStream);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mMultiplexStream = do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mMultiplexStreamCopier = do_CreateInstance("@mozilla.org/network/async-stream-copier;1", &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
nsCOMPtr<nsISocketTransportService> sts =
do_GetService(NS_SOCKETTRANSPORTSERVICE_CONTRACTID);
if (NS_WARN_IF(!sts)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsCOMPtr<nsIEventTarget> target = do_QueryInterface(sts);
rv = mMultiplexStreamCopier->Init(mMultiplexStream,
mSocketOutputStream,
target,
true, /* source buffered */
false, /* sink buffered */
BUFFER_SIZE,
false, /* close source */
false); /* close sink */
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult
PresentationSessionTransport::CreateInputStreamPump()
{
nsresult rv;
mInputStreamPump = do_CreateInstance(NS_INPUTSTREAMPUMP_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = mInputStreamPump->Init(mSocketInputStream, -1, -1, 0, 0, false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = mInputStreamPump->AsyncRead(this, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::EnableDataNotification()
{
if (NS_WARN_IF(!mCallback)) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
if (mDataNotificationEnabled) {
return NS_OK;
}
mDataNotificationEnabled = true;
if (IsReadyToNotifyData()) {
return CreateInputStreamPump();
}
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::GetCallback(nsIPresentationSessionTransportCallback** aCallback)
{
nsCOMPtr<nsIPresentationSessionTransportCallback> callback = mCallback;
callback.forget(aCallback);
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::SetCallback(nsIPresentationSessionTransportCallback* aCallback)
{
mCallback = aCallback;
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::GetSelfAddress(nsINetAddr** aSelfAddress)
{
if (NS_WARN_IF(!mTransport)) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
return mTransport->GetScriptableSelfAddr(aSelfAddress);
}
void
PresentationSessionTransport::EnsureCopying()
{
if (mAsyncCopierActive) {
return;
}
mAsyncCopierActive = true;
RefPtr<CopierCallbacks> callbacks = new CopierCallbacks(this);
NS_WARN_IF(NS_FAILED(mMultiplexStreamCopier->AsyncCopy(callbacks, nullptr)));
}
void
PresentationSessionTransport::NotifyCopyComplete(nsresult aStatus)
{
mAsyncCopierActive = false;
mMultiplexStream->RemoveStream(0);
if (NS_WARN_IF(NS_FAILED(aStatus))) {
if (mReadyState != CLOSED) {
mCloseStatus = aStatus;
SetReadyState(CLOSED);
}
return;
}
uint32_t count;
nsresult rv = mMultiplexStream->GetCount(&count);
if (NS_WARN_IF(NS_FAILED(rv))) {
return;
}
if (count) {
EnsureCopying();
return;
}
if (mReadyState == CLOSING) {
mSocketOutputStream->Close();
mCloseStatus = NS_OK;
SetReadyState(CLOSED);
}
}
NS_IMETHODIMP
PresentationSessionTransport::Send(nsIInputStream* aData)
{
if (NS_WARN_IF(mReadyState != OPEN)) {
return NS_ERROR_DOM_INVALID_STATE_ERR;
}
mMultiplexStream->AppendStream(aData);
EnsureCopying();
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::Close(nsresult aReason)
{
if (mReadyState == CLOSED || mReadyState == CLOSING) {
return NS_OK;
}
mCloseStatus = aReason;
SetReadyState(CLOSING);
uint32_t count = 0;
mMultiplexStream->GetCount(&count);
if (!count) {
mSocketOutputStream->Close();
}
mSocketInputStream->Close();
mDataNotificationEnabled = false;
return NS_OK;
}
void
PresentationSessionTransport::SetReadyState(ReadyState aReadyState)
{
mReadyState = aReadyState;
if (mReadyState == OPEN && mCallback) {
// Notify the transport channel is ready.
NS_WARN_IF(NS_FAILED(mCallback->NotifyTransportReady()));
} else if (mReadyState == CLOSED && mCallback) {
// Notify the transport channel has been shut down.
NS_WARN_IF(NS_FAILED(mCallback->NotifyTransportClosed(mCloseStatus)));
}
}
// nsITransportEventSink
NS_IMETHODIMP
PresentationSessionTransport::OnTransportStatus(nsITransport* aTransport,
nsresult aStatus,
int64_t aProgress,
int64_t aProgressMax)
{
MOZ_ASSERT(NS_IsMainThread());
if (aStatus != NS_NET_STATUS_CONNECTED_TO) {
return NS_OK;
}
SetReadyState(OPEN);
if (IsReadyToNotifyData()) {
return CreateInputStreamPump();
}
return NS_OK;
}
// nsIInputStreamCallback
NS_IMETHODIMP
PresentationSessionTransport::OnInputStreamReady(nsIAsyncInputStream* aStream)
{
MOZ_ASSERT(NS_IsMainThread());
// Only used for detecting if the connection was refused.
uint64_t dummy;
nsresult rv = aStream->Available(&dummy);
if (NS_WARN_IF(NS_FAILED(rv))) {
if (mReadyState != CLOSED) {
mCloseStatus = NS_ERROR_CONNECTION_REFUSED;
SetReadyState(CLOSED);
}
}
return NS_OK;
}
// nsIRequestObserver
NS_IMETHODIMP
PresentationSessionTransport::OnStartRequest(nsIRequest* aRequest,
nsISupports* aContext)
{
// Do nothing.
return NS_OK;
}
NS_IMETHODIMP
PresentationSessionTransport::OnStopRequest(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatusCode)
{
MOZ_ASSERT(NS_IsMainThread());
uint32_t count;
nsresult rv = mMultiplexStream->GetCount(&count);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
mInputStreamPump = nullptr;
if (count != 0 && NS_SUCCEEDED(aStatusCode)) {
// If we have some buffered output still, and status is not an error, the
// other side has done a half-close, but we don't want to be in the close
// state until we are done sending everything that was buffered. We also
// don't want to call |NotifyTransportClosed| yet.
return NS_OK;
}
// We call this even if there is no error.
if (mReadyState != CLOSED) {
mCloseStatus = aStatusCode;
SetReadyState(CLOSED);
}
return NS_OK;
}
// nsIStreamListener
NS_IMETHODIMP
PresentationSessionTransport::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aStream,
uint64_t aOffset,
uint32_t aCount)
{
MOZ_ASSERT(NS_IsMainThread());
if (NS_WARN_IF(!mCallback)) {
return NS_ERROR_NOT_AVAILABLE;
}
nsCString data;
nsresult rv = mInputStreamScriptable->ReadBytes(aCount, data);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Pass the incoming data to the listener.
return mCallback->NotifyData(data);
}