content/browser/renderer_host/p2p/socket_dispatcher_host.cc

   1 // Copyright (c) 2012 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/browser/renderer_host/p2p/socket_dispatcher_host.h"
   6
   7 #include "base/bind.h"
   8 #include "base/stl_util.h"
   9 #include "content/browser/renderer_host/p2p/socket_host.h"
  10 #include "content/common/p2p_messages.h"
  11 #include "content/public/browser/resource_context.h"
  12 #include "net/base/address_list.h"
  13 #include "net/base/completion_callback.h"
  14 #include "net/base/net_errors.h"
  15 #include "net/base/net_log.h"
  16 #include "net/base/sys_addrinfo.h"
  17 #include "net/dns/single_request_host_resolver.h"
  18 #include "net/url_request/url_request_context_getter.h"
  19
  20 using content::BrowserMessageFilter;
  21 using content::BrowserThread;
  22
  23 namespace content {
  24
  25 const size_t kMaximumPacketSize = 32768;
  26
  27 class P2PSocketDispatcherHost::DnsRequest {
  28  public:
  29   typedef base::Callback<void(const net::IPAddressList&)> DoneCallback;
  30
  31   DnsRequest(int32 request_id, net::HostResolver* host_resolver)
  32       : request_id_(request_id),
  33         resolver_(host_resolver) {
  34   }
  35
  36   void Resolve(const std::string& host_name,
  37                const DoneCallback& done_callback) {
  38     DCHECK(!done_callback.is_null());
  39
  40     host_name_ = host_name;
  41     done_callback_ = done_callback;
  42
  43     // Return an error if it's an empty string.
  44     if (host_name_.empty()) {
  45       net::IPAddressList address_list;
  46       done_callback_.Run(address_list);
  47       return;
  48     }
  49
  50     // Add period at the end to make sure that we only resolve
  51     // fully-qualified names.
  52     if (host_name_.at(host_name_.size() - 1) != '.')
  53       host_name_ = host_name_ + '.';
  54
  55     net::HostResolver::RequestInfo info(net::HostPortPair(host_name_, 0));
  56     int result = resolver_.Resolve(
  57         info,
  58         net::DEFAULT_PRIORITY,
  59         &addresses_,
  60         base::Bind(&P2PSocketDispatcherHost::DnsRequest::OnDone,
  61                    base::Unretained(this)),
  62         net::BoundNetLog());
  63     if (result != net::ERR_IO_PENDING)
  64       OnDone(result);
  65   }
  66
  67   int32 request_id() { return request_id_; }
  68
  69  private:
  70   void OnDone(int result) {
  71     net::IPAddressList list;
  72     if (result != net::OK) {
  73       LOG(ERROR) << "Failed to resolve address for " << host_name_
  74                  << ", errorcode: " << result;
  75       done_callback_.Run(list);
  76       return;
  77     }
  78
  79     DCHECK(!addresses_.empty());
  80     for (net::AddressList::iterator iter = addresses_.begin();
  81          iter != addresses_.end(); ++iter) {
  82       list.push_back(iter->address());
  83     }
  84     done_callback_.Run(list);
  85   }
  86
  87   int32 request_id_;
  88   net::AddressList addresses_;
  89
  90   std::string host_name_;
  91   net::SingleRequestHostResolver resolver_;
  92
  93   DoneCallback done_callback_;
  94 };
  95
  96 P2PSocketDispatcherHost::P2PSocketDispatcherHost(
  97     content::ResourceContext* resource_context,
  98     net::URLRequestContextGetter* url_context)
  99     : BrowserMessageFilter(P2PMsgStart),
 100       resource_context_(resource_context),
 101       url_context_(url_context),
 102       monitoring_networks_(false) {
 103 }
 104
 105 void P2PSocketDispatcherHost::OnChannelClosing() {
 106   // Since the IPC channel is gone, close pending connections.
 107   STLDeleteContainerPairSecondPointers(sockets_.begin(), sockets_.end());
 108   sockets_.clear();
 109
 110   STLDeleteContainerPointers(dns_requests_.begin(), dns_requests_.end());
 111   dns_requests_.clear();
 112
 113   if (monitoring_networks_) {
 114     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 115     monitoring_networks_ = false;
 116   }
 117 }
 118
 119 void P2PSocketDispatcherHost::OnDestruct() const {
 120   BrowserThread::DeleteOnIOThread::Destruct(this);
 121 }
 122
 123 bool P2PSocketDispatcherHost::OnMessageReceived(const IPC::Message& message,
 124                                                 bool* message_was_ok) {
 125   bool handled = true;
 126   IPC_BEGIN_MESSAGE_MAP_EX(P2PSocketDispatcherHost, message, *message_was_ok)
 127     IPC_MESSAGE_HANDLER(P2PHostMsg_StartNetworkNotifications,
 128                         OnStartNetworkNotifications)
 129     IPC_MESSAGE_HANDLER(P2PHostMsg_StopNetworkNotifications,
 130                         OnStopNetworkNotifications)
 131     IPC_MESSAGE_HANDLER(P2PHostMsg_GetHostAddress, OnGetHostAddress)
 132     IPC_MESSAGE_HANDLER(P2PHostMsg_CreateSocket, OnCreateSocket)
 133     IPC_MESSAGE_HANDLER(P2PHostMsg_AcceptIncomingTcpConnection,
 134                         OnAcceptIncomingTcpConnection)
 135     IPC_MESSAGE_HANDLER(P2PHostMsg_Send, OnSend)
 136     IPC_MESSAGE_HANDLER(P2PHostMsg_SetOption, OnSetOption)
 137     IPC_MESSAGE_HANDLER(P2PHostMsg_DestroySocket, OnDestroySocket)
 138     IPC_MESSAGE_UNHANDLED(handled = false)
 139   IPC_END_MESSAGE_MAP_EX()
 140   return handled;
 141 }
 142
 143 void P2PSocketDispatcherHost::OnIPAddressChanged() {
 144   // Notify the renderer about changes to list of network interfaces.
 145   BrowserThread::PostTask(
 146       BrowserThread::FILE, FROM_HERE, base::Bind(
 147           &P2PSocketDispatcherHost::DoGetNetworkList, this));
 148 }
 149
 150 P2PSocketDispatcherHost::~P2PSocketDispatcherHost() {
 151   DCHECK(sockets_.empty());
 152   DCHECK(dns_requests_.empty());
 153
 154   if (monitoring_networks_)
 155     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 156 }
 157
 158 P2PSocketHost* P2PSocketDispatcherHost::LookupSocket(int socket_id) {
 159   SocketsMap::iterator it = sockets_.find(socket_id);
 160   return (it == sockets_.end()) ? NULL : it->second;
 161 }
 162
 163 void P2PSocketDispatcherHost::OnStartNetworkNotifications(
 164     const IPC::Message& msg) {
 165   if (!monitoring_networks_) {
 166     net::NetworkChangeNotifier::AddIPAddressObserver(this);
 167     monitoring_networks_ = true;
 168   }
 169
 170   BrowserThread::PostTask(
 171       BrowserThread::FILE, FROM_HERE, base::Bind(
 172           &P2PSocketDispatcherHost::DoGetNetworkList, this));
 173 }
 174
 175 void P2PSocketDispatcherHost::OnStopNetworkNotifications(
 176     const IPC::Message& msg) {
 177   if (monitoring_networks_) {
 178     net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 179     monitoring_networks_ = false;
 180   }
 181 }
 182
 183 void P2PSocketDispatcherHost::OnGetHostAddress(const std::string& host_name,
 184                                                int32 request_id) {
 185   DnsRequest* request = new DnsRequest(request_id,
 186                                        resource_context_->GetHostResolver());
 187   dns_requests_.insert(request);
 188   request->Resolve(host_name, base::Bind(
 189       &P2PSocketDispatcherHost::OnAddressResolved,
 190       base::Unretained(this), request));
 191 }
 192
 193 void P2PSocketDispatcherHost::OnCreateSocket(
 194     P2PSocketType type, int socket_id,
 195     const net::IPEndPoint& local_address,
 196     const P2PHostAndIPEndPoint& remote_address) {
 197   if (LookupSocket(socket_id)) {
 198     LOG(ERROR) << "Received P2PHostMsg_CreateSocket for socket "
 199         "that already exists.";
 200     return;
 201   }
 202
 203   scoped_ptr<P2PSocketHost> socket(P2PSocketHost::Create(
 204       this, socket_id, type, url_context_.get(), &throttler_));
 205
 206   if (!socket) {
 207     Send(new P2PMsg_OnError(socket_id));
 208     return;
 209   }
 210
 211   if (socket->Init(local_address, remote_address)) {
 212     sockets_[socket_id] = socket.release();
 213   }
 214 }
 215
 216 void P2PSocketDispatcherHost::OnAcceptIncomingTcpConnection(
 217     int listen_socket_id, const net::IPEndPoint& remote_address,
 218     int connected_socket_id) {
 219   P2PSocketHost* socket = LookupSocket(listen_socket_id);
 220   if (!socket) {
 221     LOG(ERROR) << "Received P2PHostMsg_AcceptIncomingTcpConnection "
 222         "for invalid socket_id.";
 223     return;
 224   }
 225   P2PSocketHost* accepted_connection =
 226       socket->AcceptIncomingTcpConnection(remote_address, connected_socket_id);
 227   if (accepted_connection) {
 228     sockets_[connected_socket_id] = accepted_connection;
 229   }
 230 }
 231
 232 void P2PSocketDispatcherHost::OnSend(int socket_id,
 233                                      const net::IPEndPoint& socket_address,
 234                                      const std::vector<char>& data,
 235                                      const talk_base::PacketOptions& options,
 236                                      uint64 packet_id) {
 237   P2PSocketHost* socket = LookupSocket(socket_id);
 238   if (!socket) {
 239     LOG(ERROR) << "Received P2PHostMsg_Send for invalid socket_id.";
 240     return;
 241   }
 242
 243   if (data.size() > kMaximumPacketSize) {
 244     LOG(ERROR) << "Received P2PHostMsg_Send with a packet that is too big: "
 245                << data.size();
 246     Send(new P2PMsg_OnError(socket_id));
 247     delete socket;
 248     sockets_.erase(socket_id);
 249     return;
 250   }
 251
 252   socket->Send(socket_address, data, options, packet_id);
 253 }
 254
 255 void P2PSocketDispatcherHost::OnSetOption(int socket_id,
 256                                           P2PSocketOption option,
 257                                           int value) {
 258   P2PSocketHost* socket = LookupSocket(socket_id);
 259   if (!socket) {
 260     LOG(ERROR) << "Received P2PHostMsg_SetOption for invalid socket_id.";
 261     return;
 262   }
 263
 264   socket->SetOption(option, value);
 265 }
 266
 267 void P2PSocketDispatcherHost::OnDestroySocket(int socket_id) {
 268   SocketsMap::iterator it = sockets_.find(socket_id);
 269   if (it != sockets_.end()) {
 270     delete it->second;
 271     sockets_.erase(it);
 272   } else {
 273     LOG(ERROR) << "Received P2PHostMsg_DestroySocket for invalid socket_id.";
 274   }
 275 }
 276
 277 void P2PSocketDispatcherHost::DoGetNetworkList() {
 278   net::NetworkInterfaceList list;
 279   net::GetNetworkList(&list, net::EXCLUDE_HOST_SCOPE_VIRTUAL_INTERFACES |
 280                              net::INCLUDE_ONLY_TEMP_IPV6_ADDRESS_IF_POSSIBLE);
 281   BrowserThread::PostTask(
 282       BrowserThread::IO, FROM_HERE, base::Bind(
 283           &P2PSocketDispatcherHost::SendNetworkList, this, list));
 284 }
 285
 286 void P2PSocketDispatcherHost::SendNetworkList(
 287     const net::NetworkInterfaceList& list) {
 288   Send(new P2PMsg_NetworkListChanged(list));
 289 }
 290
 291 void P2PSocketDispatcherHost::OnAddressResolved(
 292     DnsRequest* request,
 293     const net::IPAddressList& addresses) {
 294   Send(new P2PMsg_GetHostAddressResult(request->request_id(), addresses));
 295
 296   dns_requests_.erase(request);
 297   delete request;
 298 }
 299
 300 }  // namespace content