ipc/glue/Transport_posix.cpp

   1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * vim: sw=2 ts=8 et :
   3  */
   4 /* This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include <unistd.h>
   9
  10 #include <string>
  11
  12 #include "chrome/common/child_process_info.h"
  13
  14 #include "mozilla/ipc/Transport.h"
  15 #include "mozilla/ipc/FileDescriptor.h"
  16
  17 using namespace std;
  18
  19 using base::ProcessHandle;
  20
  21 namespace mozilla {
  22 namespace ipc {
  23
  24 bool
  25 CreateTransport(ProcessHandle /*unused*/, ProcessHandle /*unused*/,
  26                 TransportDescriptor* aOne, TransportDescriptor* aTwo)
  27 {
  28   wstring id = IPC::Channel::GenerateVerifiedChannelID(std::wstring());
  29   // Use MODE_SERVER to force creation of the socketpair
  30   Transport t(id, Transport::MODE_SERVER, nullptr);
  31   int fd1 = t.GetFileDescriptor();
  32   int fd2, dontcare;
  33   t.GetClientFileDescriptorMapping(&fd2, &dontcare);
  34   if (fd1 < 0 || fd2 < 0) {
  35     return false;
  36   }
  37
  38   // The Transport closes these fds when it goes out of scope, so we
  39   // dup them here
  40   fd1 = dup(fd1);
  41   fd2 = dup(fd2);
  42   if (fd1 < 0 || fd2 < 0) {
  43     return false;
  44   }
  45
  46   aOne->mFd = base::FileDescriptor(fd1, true/*close after sending*/);
  47   aTwo->mFd = base::FileDescriptor(fd2, true/*close after sending*/);
  48   return true;
  49 }
  50
  51 Transport*
  52 OpenDescriptor(const TransportDescriptor& aTd, Transport::Mode aMode)
  53 {
  54   return new Transport(aTd.mFd.fd, aMode, nullptr);
  55 }
  56
  57 Transport*
  58 OpenDescriptor(const FileDescriptor& aFd, Transport::Mode aMode)
  59 {
  60   return new Transport(aFd.PlatformHandle(), aMode, nullptr);
  61 }
  62
  63 void
  64 CloseDescriptor(const TransportDescriptor& aTd)
  65 {
  66   close(aTd.mFd.fd);
  67 }
  68
  69 } // namespace ipc
  70 } // namespace mozilla