blob: f040ef2c0ad5a986d53a8d460a1040cbb250d475 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "extensions/browser/api/bluetooth_socket/bluetooth_socket_event_dispatcher.h"
#include "base/lazy_instance.h"
#include "device/bluetooth/bluetooth_device.h"
#include "device/bluetooth/bluetooth_socket.h"
#include "extensions/browser/api/bluetooth_socket/bluetooth_api_socket.h"
#include "extensions/browser/event_router.h"
#include "extensions/common/api/bluetooth_socket.h"
#include "net/base/io_buffer.h"
namespace {
namespace bluetooth_socket = extensions::api::bluetooth_socket;
using extensions::BluetoothApiSocket;
int kDefaultBufferSize = 4096;
bluetooth_socket::ReceiveError MapReceiveErrorReason(
BluetoothApiSocket::ErrorReason value) {
switch (value) {
case BluetoothApiSocket::kDisconnected:
return bluetooth_socket::RECEIVE_ERROR_DISCONNECTED;
case BluetoothApiSocket::kNotConnected:
// kNotConnected is impossible since a socket has to be connected to be
// able to call Receive() on it.
// fallthrough
case BluetoothApiSocket::kIOPending:
// kIOPending is not relevant to apps, as BluetoothSocketEventDispatcher
// handles this specific error.
// fallthrough
default:
return bluetooth_socket::RECEIVE_ERROR_SYSTEM_ERROR;
}
}
bluetooth_socket::AcceptError MapAcceptErrorReason(
BluetoothApiSocket::ErrorReason value) {
// TODO(keybuk): All values are system error, we may want to seperate these
// out to more discrete reasons.
switch (value) {
case BluetoothApiSocket::kNotListening:
// kNotListening is impossible since a socket has to be listening to be
// able to call Accept() on it.
// fallthrough
default:
return bluetooth_socket::ACCEPT_ERROR_SYSTEM_ERROR;
}
}
} // namespace
namespace extensions {
namespace api {
using content::BrowserThread;
static base::LazyInstance<
BrowserContextKeyedAPIFactory<BluetoothSocketEventDispatcher> > g_factory =
LAZY_INSTANCE_INITIALIZER;
// static
BrowserContextKeyedAPIFactory<BluetoothSocketEventDispatcher>*
BluetoothSocketEventDispatcher::GetFactoryInstance() {
return g_factory.Pointer();
}
// static
BluetoothSocketEventDispatcher* BluetoothSocketEventDispatcher::Get(
content::BrowserContext* context) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
return BrowserContextKeyedAPIFactory<BluetoothSocketEventDispatcher>::Get(
context);
}
BluetoothSocketEventDispatcher::BluetoothSocketEventDispatcher(
content::BrowserContext* context)
: thread_id_(BluetoothApiSocket::kThreadId),
browser_context_(context) {
ApiResourceManager<BluetoothApiSocket>* manager =
ApiResourceManager<BluetoothApiSocket>::Get(browser_context_);
DCHECK(manager)
<< "There is no socket manager. "
"If this assertion is failing during a test, then it is likely that "
"TestExtensionSystem is failing to provide an instance of "
"ApiResourceManager<BluetoothApiSocket>.";
sockets_ = manager->data_;
}
BluetoothSocketEventDispatcher::~BluetoothSocketEventDispatcher() {}
BluetoothSocketEventDispatcher::SocketParams::SocketParams() {}
BluetoothSocketEventDispatcher::SocketParams::~SocketParams() {}
void BluetoothSocketEventDispatcher::OnSocketConnect(
const std::string& extension_id,
int socket_id) {
DCHECK_CURRENTLY_ON(thread_id_);
SocketParams params;
params.thread_id = thread_id_;
params.browser_context_id = browser_context_;
params.extension_id = extension_id;
params.sockets = sockets_;
params.socket_id = socket_id;
StartReceive(params);
}
void BluetoothSocketEventDispatcher::OnSocketListen(
const std::string& extension_id,
int socket_id) {
DCHECK_CURRENTLY_ON(thread_id_);
SocketParams params;
params.thread_id = thread_id_;
params.browser_context_id = browser_context_;
params.extension_id = extension_id;
params.sockets = sockets_;
params.socket_id = socket_id;
StartAccept(params);
}
void BluetoothSocketEventDispatcher::OnSocketResume(
const std::string& extension_id,
int socket_id) {
DCHECK_CURRENTLY_ON(thread_id_);
SocketParams params;
params.thread_id = thread_id_;
params.browser_context_id = browser_context_;
params.extension_id = extension_id;
params.sockets = sockets_;
params.socket_id = socket_id;
BluetoothApiSocket* socket =
params.sockets->Get(params.extension_id, params.socket_id);
if (!socket) {
// This can happen if the socket is closed while our callback is active.
return;
}
if (socket->IsConnected()) {
StartReceive(params);
} else {
StartAccept(params);
}
}
// static
void BluetoothSocketEventDispatcher::StartReceive(const SocketParams& params) {
DCHECK_CURRENTLY_ON(params.thread_id);
BluetoothApiSocket* socket =
params.sockets->Get(params.extension_id, params.socket_id);
if (!socket) {
// This can happen if the socket is closed while our callback is active.
return;
}
DCHECK(params.extension_id == socket->owner_extension_id())
<< "Socket has wrong owner.";
// Don't start another read if the socket has been paused.
if (socket->paused())
return;
int buffer_size = socket->buffer_size();
if (buffer_size <= 0)
buffer_size = kDefaultBufferSize;
socket->Receive(
buffer_size,
base::Bind(
&BluetoothSocketEventDispatcher::ReceiveCallback, params),
base::Bind(
&BluetoothSocketEventDispatcher::ReceiveErrorCallback, params));
}
// static
void BluetoothSocketEventDispatcher::ReceiveCallback(
const SocketParams& params,
int bytes_read,
scoped_refptr<net::IOBuffer> io_buffer) {
DCHECK_CURRENTLY_ON(params.thread_id);
// Dispatch "onReceive" event.
bluetooth_socket::ReceiveInfo receive_info;
receive_info.socket_id = params.socket_id;
receive_info.data.assign(io_buffer->data(), io_buffer->data() + bytes_read);
scoped_ptr<base::ListValue> args =
bluetooth_socket::OnReceive::Create(receive_info);
scoped_ptr<Event> event(new Event(events::BLUETOOTH_SOCKET_ON_RECEIVE,
bluetooth_socket::OnReceive::kEventName,
args.Pass()));
PostEvent(params, event.Pass());
// Post a task to delay the read until the socket is available, as
// calling StartReceive at this point would error with ERR_IO_PENDING.
BrowserThread::PostTask(
params.thread_id,
FROM_HERE,
base::Bind(&BluetoothSocketEventDispatcher::StartReceive, params));
}
// static
void BluetoothSocketEventDispatcher::ReceiveErrorCallback(
const SocketParams& params,
BluetoothApiSocket::ErrorReason error_reason,
const std::string& error) {
DCHECK_CURRENTLY_ON(params.thread_id);
if (error_reason == BluetoothApiSocket::kIOPending) {
// This happens when resuming a socket which already had an active "read"
// callback. We can safely ignore this error, as the application should not
// care.
return;
}
// Dispatch "onReceiveError" event but don't start another read to avoid
// potential infinite reads if we have a persistent network error.
bluetooth_socket::ReceiveErrorInfo receive_error_info;
receive_error_info.socket_id = params.socket_id;
receive_error_info.error_message = error;
receive_error_info.error = MapReceiveErrorReason(error_reason);
scoped_ptr<base::ListValue> args =
bluetooth_socket::OnReceiveError::Create(receive_error_info);
scoped_ptr<Event> event(
new Event(events::BLUETOOTH_SOCKET_ON_RECEIVE_ERROR,
bluetooth_socket::OnReceiveError::kEventName, args.Pass()));
PostEvent(params, event.Pass());
// Since we got an error, the socket is now "paused" until the application
// "resumes" it.
BluetoothApiSocket* socket =
params.sockets->Get(params.extension_id, params.socket_id);
if (socket) {
socket->set_paused(true);
}
}
// static
void BluetoothSocketEventDispatcher::StartAccept(const SocketParams& params) {
DCHECK_CURRENTLY_ON(params.thread_id);
BluetoothApiSocket* socket =
params.sockets->Get(params.extension_id, params.socket_id);
if (!socket) {
// This can happen if the socket is closed while our callback is active.
return;
}
DCHECK(params.extension_id == socket->owner_extension_id())
<< "Socket has wrong owner.";
// Don't start another accept if the socket has been paused.
if (socket->paused())
return;
socket->Accept(
base::Bind(
&BluetoothSocketEventDispatcher::AcceptCallback, params),
base::Bind(
&BluetoothSocketEventDispatcher::AcceptErrorCallback, params));
}
// static
void BluetoothSocketEventDispatcher::AcceptCallback(
const SocketParams& params,
const device::BluetoothDevice* device,
scoped_refptr<device::BluetoothSocket> socket) {
DCHECK_CURRENTLY_ON(params.thread_id);
BluetoothApiSocket* server_api_socket =
params.sockets->Get(params.extension_id, params.socket_id);
DCHECK(server_api_socket);
BluetoothApiSocket* client_api_socket = new BluetoothApiSocket(
params.extension_id,
socket,
device->GetAddress(),
server_api_socket->uuid());
int client_socket_id = params.sockets->Add(client_api_socket);
// Dispatch "onAccept" event.
bluetooth_socket::AcceptInfo accept_info;
accept_info.socket_id = params.socket_id;
accept_info.client_socket_id = client_socket_id;
scoped_ptr<base::ListValue> args =
bluetooth_socket::OnAccept::Create(accept_info);
scoped_ptr<Event> event(new Event(events::BLUETOOTH_SOCKET_ON_ACCEPT,
bluetooth_socket::OnAccept::kEventName,
args.Pass()));
PostEvent(params, event.Pass());
// Post a task to delay the accept until the socket is available, as
// calling StartAccept at this point would error with ERR_IO_PENDING.
BrowserThread::PostTask(
params.thread_id,
FROM_HERE,
base::Bind(&BluetoothSocketEventDispatcher::StartAccept, params));
}
// static
void BluetoothSocketEventDispatcher::AcceptErrorCallback(
const SocketParams& params,
BluetoothApiSocket::ErrorReason error_reason,
const std::string& error) {
DCHECK_CURRENTLY_ON(params.thread_id);
if (error_reason == BluetoothApiSocket::kIOPending) {
// This happens when resuming a socket which already had an active "accept"
// callback. We can safely ignore this error, as the application should not
// care.
return;
}
// Dispatch "onAcceptError" event but don't start another accept to avoid
// potential infinite accepts if we have a persistent network error.
bluetooth_socket::AcceptErrorInfo accept_error_info;
accept_error_info.socket_id = params.socket_id;
accept_error_info.error_message = error;
accept_error_info.error = MapAcceptErrorReason(error_reason);
scoped_ptr<base::ListValue> args =
bluetooth_socket::OnAcceptError::Create(accept_error_info);
scoped_ptr<Event> event(new Event(events::BLUETOOTH_SOCKET_ON_ACCEPT_ERROR,
bluetooth_socket::OnAcceptError::kEventName,
args.Pass()));
PostEvent(params, event.Pass());
// Since we got an error, the socket is now "paused" until the application
// "resumes" it.
BluetoothApiSocket* socket =
params.sockets->Get(params.extension_id, params.socket_id);
if (socket) {
socket->set_paused(true);
}
}
// static
void BluetoothSocketEventDispatcher::PostEvent(const SocketParams& params,
scoped_ptr<Event> event) {
DCHECK_CURRENTLY_ON(params.thread_id);
BrowserThread::PostTask(
BrowserThread::UI,
FROM_HERE,
base::Bind(&DispatchEvent,
params.browser_context_id,
params.extension_id,
base::Passed(event.Pass())));
}
// static
void BluetoothSocketEventDispatcher::DispatchEvent(
void* browser_context_id,
const std::string& extension_id,
scoped_ptr<Event> event) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
content::BrowserContext* context =
reinterpret_cast<content::BrowserContext*>(browser_context_id);
if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
return;
EventRouter* router = EventRouter::Get(context);
if (router)
router->DispatchEventToExtension(extension_id, event.Pass());
}
} // namespace api
} // namespace extensions