src/ppapi/proxy/udp_socket_resource_base.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 "ppapi/proxy/udp_socket_resource_base.h"
   6
   7 #include <algorithm>
   8 #include <cstring>
   9
  10 #include "base/logging.h"
  11 #include "ppapi/c/pp_bool.h"
  12 #include "ppapi/c/pp_completion_callback.h"
  13 #include "ppapi/c/pp_errors.h"
  14 #include "ppapi/proxy/error_conversion.h"
  15 #include "ppapi/proxy/ppapi_messages.h"
  16 #include "ppapi/shared_impl/socket_option_data.h"
  17 #include "ppapi/thunk/enter.h"
  18 #include "ppapi/thunk/resource_creation_api.h"
  19
  20 namespace ppapi {
  21 namespace proxy {
  22
  23 const int32_t UDPSocketResourceBase::kMaxReadSize = 1024 * 1024;
  24 const int32_t UDPSocketResourceBase::kMaxWriteSize = 1024 * 1024;
  25 const int32_t UDPSocketResourceBase::kMaxSendBufferSize =
  26     1024 * UDPSocketResourceBase::kMaxWriteSize;
  27 const int32_t UDPSocketResourceBase::kMaxReceiveBufferSize =
  28     1024 * UDPSocketResourceBase::kMaxReadSize;
  29
  30
  31 UDPSocketResourceBase::UDPSocketResourceBase(Connection connection,
  32                                              PP_Instance instance,
  33                                              bool private_api)
  34     : PluginResource(connection, instance),
  35       private_api_(private_api),
  36       bound_(false),
  37       closed_(false),
  38       read_buffer_(NULL),
  39       bytes_to_read_(-1) {
  40   recvfrom_addr_.size = 0;
  41   memset(recvfrom_addr_.data, 0,
  42          arraysize(recvfrom_addr_.data) * sizeof(*recvfrom_addr_.data));
  43   bound_addr_.size = 0;
  44   memset(bound_addr_.data, 0,
  45          arraysize(bound_addr_.data) * sizeof(*bound_addr_.data));
  46
  47   if (private_api)
  48     SendCreate(BROWSER, PpapiHostMsg_UDPSocket_CreatePrivate());
  49   else
  50     SendCreate(BROWSER, PpapiHostMsg_UDPSocket_Create());
  51 }
  52
  53 UDPSocketResourceBase::~UDPSocketResourceBase() {
  54 }
  55
  56 int32_t UDPSocketResourceBase::SetOptionImpl(
  57     PP_UDPSocket_Option name,
  58     const PP_Var& value,
  59     scoped_refptr<TrackedCallback> callback) {
  60   if (closed_)
  61     return PP_ERROR_FAILED;
  62
  63   SocketOptionData option_data;
  64   switch (name) {
  65     case PP_UDPSOCKET_OPTION_ADDRESS_REUSE:
  66     case PP_UDPSOCKET_OPTION_BROADCAST: {
  67       if (bound_)
  68         return PP_ERROR_FAILED;
  69       if (value.type != PP_VARTYPE_BOOL)
  70         return PP_ERROR_BADARGUMENT;
  71       option_data.SetBool(PP_ToBool(value.value.as_bool));
  72       break;
  73     }
  74     case PP_UDPSOCKET_OPTION_SEND_BUFFER_SIZE:
  75     case PP_UDPSOCKET_OPTION_RECV_BUFFER_SIZE: {
  76       if (!bound_)
  77         return PP_ERROR_FAILED;
  78       if (value.type != PP_VARTYPE_INT32)
  79         return PP_ERROR_BADARGUMENT;
  80       option_data.SetInt32(value.value.as_int);
  81       break;
  82     }
  83     default: {
  84       NOTREACHED();
  85       return PP_ERROR_BADARGUMENT;
  86     }
  87   }
  88
  89   Call<PpapiPluginMsg_UDPSocket_SetOptionReply>(
  90       BROWSER,
  91       PpapiHostMsg_UDPSocket_SetOption(name, option_data),
  92       base::Bind(&UDPSocketResourceBase::OnPluginMsgSetOptionReply,
  93                  base::Unretained(this),
  94                  callback));
  95   return PP_OK_COMPLETIONPENDING;
  96 }
  97
  98 int32_t UDPSocketResourceBase::BindImpl(
  99     const PP_NetAddress_Private* addr,
 100     scoped_refptr<TrackedCallback> callback) {
 101   if (!addr)
 102     return PP_ERROR_BADARGUMENT;
 103   if (bound_ || closed_)
 104     return PP_ERROR_FAILED;
 105   if (TrackedCallback::IsPending(bind_callback_))
 106     return PP_ERROR_INPROGRESS;
 107
 108   bind_callback_ = callback;
 109
 110   // Send the request, the browser will call us back via BindReply.
 111   Call<PpapiPluginMsg_UDPSocket_BindReply>(
 112       BROWSER,
 113       PpapiHostMsg_UDPSocket_Bind(*addr),
 114       base::Bind(&UDPSocketResourceBase::OnPluginMsgBindReply,
 115                  base::Unretained(this)));
 116   return PP_OK_COMPLETIONPENDING;
 117 }
 118
 119 PP_Bool UDPSocketResourceBase::GetBoundAddressImpl(
 120     PP_NetAddress_Private* addr) {
 121   if (!addr || !bound_ || closed_)
 122     return PP_FALSE;
 123
 124   *addr = bound_addr_;
 125   return PP_TRUE;
 126 }
 127
 128 int32_t UDPSocketResourceBase::RecvFromImpl(
 129     char* buffer,
 130     int32_t num_bytes,
 131     PP_Resource* addr,
 132     scoped_refptr<TrackedCallback> callback) {
 133   if (!buffer || num_bytes <= 0)
 134     return PP_ERROR_BADARGUMENT;
 135   if (!bound_)
 136     return PP_ERROR_FAILED;
 137   if (TrackedCallback::IsPending(recvfrom_callback_))
 138     return PP_ERROR_INPROGRESS;
 139
 140   read_buffer_ = buffer;
 141   bytes_to_read_ = std::min(num_bytes, kMaxReadSize);
 142   recvfrom_callback_ = callback;
 143
 144   // Send the request, the browser will call us back via RecvFromReply.
 145   Call<PpapiPluginMsg_UDPSocket_RecvFromReply>(
 146       BROWSER,
 147       PpapiHostMsg_UDPSocket_RecvFrom(bytes_to_read_),
 148       base::Bind(&UDPSocketResourceBase::OnPluginMsgRecvFromReply,
 149                  base::Unretained(this), addr));
 150   return PP_OK_COMPLETIONPENDING;
 151 }
 152
 153 PP_Bool UDPSocketResourceBase::GetRecvFromAddressImpl(
 154     PP_NetAddress_Private* addr) {
 155   if (!addr)
 156     return PP_FALSE;
 157   *addr = recvfrom_addr_;
 158   return PP_TRUE;
 159 }
 160
 161 int32_t UDPSocketResourceBase::SendToImpl(
 162     const char* buffer,
 163     int32_t num_bytes,
 164     const PP_NetAddress_Private* addr,
 165     scoped_refptr<TrackedCallback> callback) {
 166   if (!buffer || num_bytes <= 0 || !addr)
 167     return PP_ERROR_BADARGUMENT;
 168   if (!bound_)
 169     return PP_ERROR_FAILED;
 170   if (TrackedCallback::IsPending(sendto_callback_))
 171     return PP_ERROR_INPROGRESS;
 172
 173   if (num_bytes > kMaxWriteSize)
 174     num_bytes = kMaxWriteSize;
 175
 176   sendto_callback_ = callback;
 177
 178   // Send the request, the browser will call us back via SendToReply.
 179   Call<PpapiPluginMsg_UDPSocket_SendToReply>(
 180       BROWSER,
 181       PpapiHostMsg_UDPSocket_SendTo(std::string(buffer, num_bytes), *addr),
 182       base::Bind(&UDPSocketResourceBase::OnPluginMsgSendToReply,
 183                  base::Unretained(this)));
 184   return PP_OK_COMPLETIONPENDING;
 185 }
 186
 187 void UDPSocketResourceBase::CloseImpl() {
 188   if(closed_)
 189     return;
 190
 191   bound_ = false;
 192   closed_ = true;
 193
 194   Post(BROWSER, PpapiHostMsg_UDPSocket_Close());
 195
 196   PostAbortIfNecessary(&bind_callback_);
 197   PostAbortIfNecessary(&recvfrom_callback_);
 198   PostAbortIfNecessary(&sendto_callback_);
 199
 200   read_buffer_ = NULL;
 201   bytes_to_read_ = -1;
 202 }
 203
 204 void UDPSocketResourceBase::PostAbortIfNecessary(
 205     scoped_refptr<TrackedCallback>* callback) {
 206   if (TrackedCallback::IsPending(*callback))
 207     (*callback)->PostAbort();
 208 }
 209
 210 void UDPSocketResourceBase::OnPluginMsgSetOptionReply(
 211     scoped_refptr<TrackedCallback> callback,
 212     const ResourceMessageReplyParams& params) {
 213   if (TrackedCallback::IsPending(callback))
 214     RunCallback(callback, params.result());
 215 }
 216
 217 void UDPSocketResourceBase::OnPluginMsgBindReply(
 218     const ResourceMessageReplyParams& params,
 219     const PP_NetAddress_Private& bound_addr) {
 220   // It is possible that |bind_callback_| is pending while |closed_| is true:
 221   // CloseImpl() has been called, but a BindReply came earlier than the task to
 222   // abort |bind_callback_|. We don't want to update |bound_| or |bound_addr_|
 223   // in that case.
 224   if (!TrackedCallback::IsPending(bind_callback_) || closed_)
 225     return;
 226
 227   if (params.result() == PP_OK)
 228     bound_ = true;
 229   bound_addr_ = bound_addr;
 230   RunCallback(bind_callback_, params.result());
 231 }
 232
 233 void UDPSocketResourceBase::OnPluginMsgRecvFromReply(
 234     PP_Resource* output_addr,
 235     const ResourceMessageReplyParams& params,
 236     const std::string& data,
 237     const PP_NetAddress_Private& addr) {
 238   // It is possible that |recvfrom_callback_| is pending while |read_buffer_| is
 239   // NULL: CloseImpl() has been called, but a RecvFromReply came earlier than
 240   // the task to abort |recvfrom_callback_|. We shouldn't access the buffer in
 241   // that case. The user may have released it.
 242   if (!TrackedCallback::IsPending(recvfrom_callback_) || !read_buffer_)
 243     return;
 244
 245   int32_t result = params.result();
 246   if (result == PP_OK && output_addr) {
 247     thunk::EnterResourceCreationNoLock enter(pp_instance());
 248     if (enter.succeeded()) {
 249       *output_addr = enter.functions()->CreateNetAddressFromNetAddressPrivate(
 250           pp_instance(), addr);
 251     } else {
 252       result = PP_ERROR_FAILED;
 253     }
 254   }
 255
 256   if (result == PP_OK) {
 257     CHECK_LE(static_cast<int32_t>(data.size()), bytes_to_read_);
 258     if (!data.empty())
 259       memcpy(read_buffer_, data.c_str(), data.size());
 260   }
 261
 262   read_buffer_ = NULL;
 263   bytes_to_read_ = -1;
 264   recvfrom_addr_ = addr;
 265
 266   if (result == PP_OK)
 267     RunCallback(recvfrom_callback_, static_cast<int32_t>(data.size()));
 268   else
 269     RunCallback(recvfrom_callback_, result);
 270 }
 271
 272 void UDPSocketResourceBase::OnPluginMsgSendToReply(
 273     const ResourceMessageReplyParams& params,
 274     int32_t bytes_written) {
 275   if (!TrackedCallback::IsPending(sendto_callback_))
 276     return;
 277
 278   if (params.result() == PP_OK)
 279     RunCallback(sendto_callback_, bytes_written);
 280   else
 281     RunCallback(sendto_callback_, params.result());
 282 }
 283
 284 void UDPSocketResourceBase::RunCallback(scoped_refptr<TrackedCallback> callback,
 285                                         int32_t pp_result) {
 286   callback->Run(ConvertNetworkAPIErrorForCompatibility(pp_result,
 287                                                        private_api_));
 288 }
 289
 290 }  // namespace proxy
 291 }  // namespace ppapi