ppapi/nacl_irt/manifest_service.cc

   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.
   4
   5 #include "ppapi/nacl_irt/manifest_service.h"
   6
   7 #include "base/message_loop/message_loop_proxy.h"
   8 #include "ipc/ipc_channel_handle.h"
   9 #include "ipc/ipc_channel_proxy.h"
  10 #include "ipc/ipc_sync_message_filter.h"
  11 #include "native_client/src/trusted/service_runtime/include/sys/errno.h"
  12 #include "ppapi/nacl_irt/irt_manifest.h"
  13 #include "ppapi/nacl_irt/plugin_startup.h"
  14 #include "ppapi/proxy/ppapi_messages.h"
  15
  16 namespace ppapi {
  17
  18 const char kFilePrefix[] = "files/";
  19
  20 ManifestService::ManifestService(
  21     const IPC::ChannelHandle& handle,
  22     scoped_refptr<base::MessageLoopProxy> io_message_loop,
  23     base::WaitableEvent* shutdown_event) {
  24   filter_ = new IPC::SyncMessageFilter(shutdown_event);
  25   channel_.reset(new IPC::ChannelProxy(handle,
  26                                        IPC::Channel::MODE_SERVER,
  27                                        NULL,  // Listener
  28                                        io_message_loop));
  29   channel_->AddFilter(filter_.get());
  30 }
  31
  32 ManifestService::~ManifestService() {
  33 }
  34
  35 void ManifestService::StartupInitializationComplete() {
  36   filter_->Send(new PpapiHostMsg_StartupInitializationComplete);
  37 }
  38
  39 bool ManifestService::OpenResource(const char* file, int* fd) {
  40   // OpenResource will return INVALID SerializedHandle, if it is not supported.
  41   // Specifically, PNaCl doesn't support open resource.
  42   ppapi::proxy::SerializedHandle ipc_fd;
  43   if (!filter_->Send(new PpapiHostMsg_OpenResource(
  44           std::string(kFilePrefix) + file, &ipc_fd)) ||
  45       !ipc_fd.is_file()) {
  46     LOG(ERROR) << "ManifestService::OpenResource failed:" << file;
  47     *fd = -1;
  48     return false;
  49   }
  50
  51   *fd = ipc_fd.descriptor().fd;
  52   return true;
  53 }
  54
  55 int IrtOpenResource(const char* file, int* fd) {
  56   // Remove leading '/' character.
  57   if (file[0] == '/')
  58     ++file;
  59
  60   ManifestService* manifest_service = GetManifestService();
  61   if (manifest_service == NULL ||
  62       !manifest_service->OpenResource(file, fd)) {
  63     return NACL_ABI_EIO;
  64   }
  65
  66   return (*fd == -1) ? NACL_ABI_ENOENT : 0;
  67 }
  68
  69 }  // namespace ppapi