1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #include "extensions/browser/api/sockets_udp/udp_socket_event_dispatcher.h"
7 #include "base/lazy_instance.h"
8 #include "extensions/browser/api/socket/udp_socket.h"
9 #include "extensions/browser/event_router.h"
10 #include "extensions/browser/extensions_browser_client.h"
11 #include "net/base/net_errors.h"
13 namespace extensions {
16 using content::BrowserThread;
18 static base::LazyInstance<
19 BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher> > g_factory =
20 LAZY_INSTANCE_INITIALIZER;
23 BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher>*
24 UDPSocketEventDispatcher::GetFactoryInstance() {
25 return g_factory.Pointer();
29 UDPSocketEventDispatcher* UDPSocketEventDispatcher::Get(
30 content::BrowserContext* context) {
31 DCHECK_CURRENTLY_ON(BrowserThread::UI);
33 return BrowserContextKeyedAPIFactory<UDPSocketEventDispatcher>::Get(context);
36 UDPSocketEventDispatcher::UDPSocketEventDispatcher(
37 content::BrowserContext* context)
38 : thread_id_(Socket::kThreadId), browser_context_(context) {
39 ApiResourceManager<ResumableUDPSocket>* manager =
40 ApiResourceManager<ResumableUDPSocket>::Get(browser_context_);
42 << "There is no socket manager. "
43 "If this assertion is failing during a test, then it is likely that "
44 "TestExtensionSystem is failing to provide an instance of "
45 "ApiResourceManager<ResumableUDPSocket>.";
46 sockets_ = manager->data_;
49 UDPSocketEventDispatcher::~UDPSocketEventDispatcher() {}
51 UDPSocketEventDispatcher::ReceiveParams::ReceiveParams() {}
53 UDPSocketEventDispatcher::ReceiveParams::~ReceiveParams() {}
55 void UDPSocketEventDispatcher::OnSocketBind(const std::string& extension_id,
57 OnSocketResume(extension_id, socket_id);
60 void UDPSocketEventDispatcher::OnSocketResume(const std::string& extension_id,
62 DCHECK_CURRENTLY_ON(thread_id_);
65 params.thread_id = thread_id_;
66 params.browser_context_id = browser_context_;
67 params.extension_id = extension_id;
68 params.sockets = sockets_;
69 params.socket_id = socket_id;
75 void UDPSocketEventDispatcher::StartReceive(const ReceiveParams& params) {
76 DCHECK_CURRENTLY_ON(params.thread_id);
78 ResumableUDPSocket* socket =
79 params.sockets->Get(params.extension_id, params.socket_id);
81 // This can happen if the socket is closed while our callback is active.
84 DCHECK(params.extension_id == socket->owner_extension_id())
85 << "Socket has wrong owner.";
87 // Don't start another read if the socket has been paused.
91 int buffer_size = (socket->buffer_size() <= 0 ? 4096 : socket->buffer_size());
94 base::Bind(&UDPSocketEventDispatcher::ReceiveCallback, params));
98 void UDPSocketEventDispatcher::ReceiveCallback(
99 const ReceiveParams& params,
101 scoped_refptr<net::IOBuffer> io_buffer,
102 const std::string& address,
104 DCHECK_CURRENTLY_ON(params.thread_id);
106 // If |bytes_read| == 0, the message contained no data.
107 // If |bytes_read| < 0, there was a network error, and |bytes_read| is a value
110 if (bytes_read >= 0) {
111 // Dispatch "onReceive" event.
112 sockets_udp::ReceiveInfo receive_info;
113 receive_info.socket_id = params.socket_id;
114 receive_info.data = std::string(io_buffer->data(), bytes_read);
115 receive_info.remote_address = address;
116 receive_info.remote_port = port;
117 scoped_ptr<base::ListValue> args =
118 sockets_udp::OnReceive::Create(receive_info);
119 scoped_ptr<Event> event(
120 new Event(sockets_udp::OnReceive::kEventName, args.Pass()));
121 PostEvent(params, event.Pass());
123 // Post a task to delay the read until the socket is available, as
124 // calling StartReceive at this point would error with ERR_IO_PENDING.
125 BrowserThread::PostTask(
128 base::Bind(&UDPSocketEventDispatcher::StartReceive, params));
129 } else if (bytes_read == net::ERR_IO_PENDING) {
130 // This happens when resuming a socket which already had an
131 // active "recv" callback.
133 // Dispatch "onReceiveError" event but don't start another read to avoid
134 // potential infinite reads if we have a persistent network error.
135 sockets_udp::ReceiveErrorInfo receive_error_info;
136 receive_error_info.socket_id = params.socket_id;
137 receive_error_info.result_code = bytes_read;
138 scoped_ptr<base::ListValue> args =
139 sockets_udp::OnReceiveError::Create(receive_error_info);
140 scoped_ptr<Event> event(
141 new Event(sockets_udp::OnReceiveError::kEventName, args.Pass()));
142 PostEvent(params, event.Pass());
144 // Since we got an error, the socket is now "paused" until the application
146 ResumableUDPSocket* socket =
147 params.sockets->Get(params.extension_id, params.socket_id);
149 socket->set_paused(true);
155 void UDPSocketEventDispatcher::PostEvent(const ReceiveParams& params,
156 scoped_ptr<Event> event) {
157 DCHECK_CURRENTLY_ON(params.thread_id);
159 BrowserThread::PostTask(BrowserThread::UI,
161 base::Bind(&DispatchEvent,
162 params.browser_context_id,
164 base::Passed(event.Pass())));
168 void UDPSocketEventDispatcher::DispatchEvent(void* browser_context_id,
169 const std::string& extension_id,
170 scoped_ptr<Event> event) {
171 DCHECK_CURRENTLY_ON(BrowserThread::UI);
173 content::BrowserContext* context =
174 reinterpret_cast<content::BrowserContext*>(browser_context_id);
175 if (!extensions::ExtensionsBrowserClient::Get()->IsValidContext(context))
177 EventRouter* router = EventRouter::Get(context);
179 router->DispatchEventToExtension(extension_id, event.Pass());
182 } // namespace core_api
183 } // namespace extensions