content/renderer/p2p/socket_client_impl.cc

   1 // Copyright 2013 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.
   4
   5 #include "content/renderer/p2p/socket_client_impl.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop_proxy.h"
   9 #include "base/time/time.h"
  10 #include "content/common/p2p_messages.h"
  11 #include "content/renderer/p2p/socket_client_delegate.h"
  12 #include "content/renderer/p2p/socket_dispatcher.h"
  13 #include "content/renderer/render_thread_impl.h"
  14 #include "crypto/random.h"
  15
  16 namespace {
  17
  18 uint64 GetUniqueId(uint32 random_socket_id, uint32 packet_id) {
  19   uint64 uid = random_socket_id;
  20   uid <<= 32;
  21   uid |= packet_id;
  22   return uid;
  23 }
  24
  25 }  // namespace
  26
  27 namespace content {
  28
  29 P2PSocketClientImpl::P2PSocketClientImpl(P2PSocketDispatcher* dispatcher)
  30     : dispatcher_(dispatcher),
  31       ipc_message_loop_(dispatcher->message_loop()),
  32       delegate_message_loop_(base::MessageLoopProxy::current()),
  33       socket_id_(0), delegate_(NULL),
  34       state_(STATE_UNINITIALIZED),
  35       random_socket_id_(0),
  36       next_packet_id_(0) {
  37   crypto::RandBytes(&random_socket_id_, sizeof(random_socket_id_));
  38 }
  39
  40 P2PSocketClientImpl::~P2PSocketClientImpl() {
  41   CHECK(state_ == STATE_CLOSED || state_ == STATE_UNINITIALIZED);
  42 }
  43
  44 void P2PSocketClientImpl::Init(
  45     P2PSocketType type,
  46     const net::IPEndPoint& local_address,
  47     const P2PHostAndIPEndPoint& remote_address,
  48     P2PSocketClientDelegate* delegate) {
  49   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
  50   DCHECK(delegate);
  51   // |delegate_| is only accessesed on |delegate_message_loop_|.
  52   delegate_ = delegate;
  53
  54   ipc_message_loop_->PostTask(
  55       FROM_HERE, base::Bind(&P2PSocketClientImpl::DoInit,
  56                             this,
  57                             type,
  58                             local_address,
  59                             remote_address));
  60 }
  61
  62 void P2PSocketClientImpl::DoInit(P2PSocketType type,
  63                                  const net::IPEndPoint& local_address,
  64                                  const P2PHostAndIPEndPoint& remote_address) {
  65   DCHECK_EQ(state_, STATE_UNINITIALIZED);
  66   state_ = STATE_OPENING;
  67   socket_id_ = dispatcher_->RegisterClient(this);
  68   dispatcher_->SendP2PMessage(new P2PHostMsg_CreateSocket(
  69       type, socket_id_, local_address, remote_address));
  70 }
  71
  72 void P2PSocketClientImpl::SendWithDscp(
  73     const net::IPEndPoint& address,
  74     const std::vector<char>& data,
  75     const talk_base::PacketOptions& options) {
  76   if (!ipc_message_loop_->BelongsToCurrentThread()) {
  77     ipc_message_loop_->PostTask(
  78         FROM_HERE, base::Bind(
  79             &P2PSocketClientImpl::SendWithDscp, this, address, data, options));
  80     return;
  81   }
  82
  83   // Can send data only when the socket is open.
  84   DCHECK(state_ == STATE_OPEN || state_ == STATE_ERROR);
  85   if (state_ == STATE_OPEN) {
  86     uint64 unique_id = GetUniqueId(random_socket_id_, ++next_packet_id_);
  87     TRACE_EVENT_ASYNC_BEGIN0("p2p", "Send", unique_id);
  88     dispatcher_->SendP2PMessage(new P2PHostMsg_Send(socket_id_, address, data,
  89                                                     options, unique_id));
  90   }
  91 }
  92
  93 void P2PSocketClientImpl::Send(const net::IPEndPoint& address,
  94                                const std::vector<char>& data) {
  95   talk_base::PacketOptions options(talk_base::DSCP_DEFAULT);
  96   SendWithDscp(address, data, options);
  97 }
  98
  99 void P2PSocketClientImpl::SetOption(P2PSocketOption option,
 100                                     int value) {
 101   if (!ipc_message_loop_->BelongsToCurrentThread()) {
 102     ipc_message_loop_->PostTask(
 103         FROM_HERE, base::Bind(
 104             &P2PSocketClientImpl::SetOption, this, option, value));
 105     return;
 106   }
 107
 108   DCHECK(state_ == STATE_OPEN || state_ == STATE_ERROR);
 109   if (state_ == STATE_OPEN) {
 110     dispatcher_->SendP2PMessage(new P2PHostMsg_SetOption(socket_id_,
 111                                                          option, value));
 112   }
 113 }
 114
 115 void P2PSocketClientImpl::Close() {
 116   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 117
 118   delegate_ = NULL;
 119
 120   ipc_message_loop_->PostTask(
 121       FROM_HERE, base::Bind(&P2PSocketClientImpl::DoClose, this));
 122 }
 123
 124 void P2PSocketClientImpl::DoClose() {
 125   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 126   if (dispatcher_) {
 127     if (state_ == STATE_OPEN || state_ == STATE_OPENING ||
 128         state_ == STATE_ERROR) {
 129       dispatcher_->SendP2PMessage(new P2PHostMsg_DestroySocket(socket_id_));
 130     }
 131     dispatcher_->UnregisterClient(socket_id_);
 132   }
 133
 134   state_ = STATE_CLOSED;
 135 }
 136
 137 int P2PSocketClientImpl::GetSocketID() const {
 138   return socket_id_;
 139 }
 140
 141 void P2PSocketClientImpl::SetDelegate(P2PSocketClientDelegate* delegate) {
 142   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 143   delegate_ = delegate;
 144 }
 145
 146 void P2PSocketClientImpl::OnSocketCreated(const net::IPEndPoint& address) {
 147   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 148   DCHECK_EQ(state_, STATE_OPENING);
 149   state_ = STATE_OPEN;
 150
 151   delegate_message_loop_->PostTask(
 152       FROM_HERE,
 153       base::Bind(&P2PSocketClientImpl::DeliverOnSocketCreated, this, address));
 154 }
 155
 156 void P2PSocketClientImpl::DeliverOnSocketCreated(
 157     const net::IPEndPoint& address) {
 158   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 159   if (delegate_)
 160     delegate_->OnOpen(address);
 161 }
 162
 163 void P2PSocketClientImpl::OnIncomingTcpConnection(
 164     const net::IPEndPoint& address) {
 165   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 166   DCHECK_EQ(state_, STATE_OPEN);
 167
 168   scoped_refptr<P2PSocketClientImpl> new_client =
 169       new P2PSocketClientImpl(dispatcher_);
 170   new_client->socket_id_ = dispatcher_->RegisterClient(new_client.get());
 171   new_client->state_ = STATE_OPEN;
 172   new_client->delegate_message_loop_ = delegate_message_loop_;
 173
 174   dispatcher_->SendP2PMessage(new P2PHostMsg_AcceptIncomingTcpConnection(
 175       socket_id_, address, new_client->socket_id_));
 176
 177   delegate_message_loop_->PostTask(
 178       FROM_HERE, base::Bind(
 179           &P2PSocketClientImpl::DeliverOnIncomingTcpConnection,
 180           this, address, new_client));
 181 }
 182
 183 void P2PSocketClientImpl::DeliverOnIncomingTcpConnection(
 184     const net::IPEndPoint& address,
 185     scoped_refptr<P2PSocketClient> new_client) {
 186   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 187   if (delegate_) {
 188     delegate_->OnIncomingTcpConnection(address, new_client.get());
 189   } else {
 190     // Just close the socket if there is no delegate to accept it.
 191     new_client->Close();
 192   }
 193 }
 194
 195 void P2PSocketClientImpl::OnSendComplete() {
 196   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 197
 198   delegate_message_loop_->PostTask(
 199       FROM_HERE, base::Bind(&P2PSocketClientImpl::DeliverOnSendComplete, this));
 200 }
 201
 202 void P2PSocketClientImpl::DeliverOnSendComplete() {
 203   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 204   if (delegate_)
 205     delegate_->OnSendComplete();
 206 }
 207
 208 void P2PSocketClientImpl::OnError() {
 209   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 210   state_ = STATE_ERROR;
 211
 212   delegate_message_loop_->PostTask(
 213       FROM_HERE, base::Bind(&P2PSocketClientImpl::DeliverOnError, this));
 214 }
 215
 216 void P2PSocketClientImpl::DeliverOnError() {
 217   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 218   if (delegate_)
 219     delegate_->OnError();
 220 }
 221
 222 void P2PSocketClientImpl::OnDataReceived(const net::IPEndPoint& address,
 223                                          const std::vector<char>& data,
 224                                          const base::TimeTicks& timestamp) {
 225   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 226   DCHECK_EQ(STATE_OPEN, state_);
 227   delegate_message_loop_->PostTask(
 228       FROM_HERE,
 229       base::Bind(&P2PSocketClientImpl::DeliverOnDataReceived,
 230                  this,
 231                  address,
 232                  data,
 233                  timestamp));
 234 }
 235
 236 void P2PSocketClientImpl::DeliverOnDataReceived(
 237   const net::IPEndPoint& address, const std::vector<char>& data,
 238   const base::TimeTicks& timestamp) {
 239   DCHECK(delegate_message_loop_->BelongsToCurrentThread());
 240   if (delegate_)
 241     delegate_->OnDataReceived(address, data, timestamp);
 242 }
 243
 244 void P2PSocketClientImpl::Detach() {
 245   DCHECK(ipc_message_loop_->BelongsToCurrentThread());
 246   dispatcher_ = NULL;
 247   OnError();
 248 }
 249
 250 }  // namespace content