remoting/host/ipc_constants.cc

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "remoting/host/ipc_constants.h"

#include "base/logging.h"
#include "base/no_destructor.h"
#include "base/path_service.h"
#include "base/strings/stringprintf.h"
#include "build/build_config.h"
#include "components/named_mojo_ipc_server/named_mojo_ipc_util.h"
#include "mojo/public/cpp/platform/named_platform_channel.h"
#include "remoting/host/base/username.h"

namespace remoting {

namespace {

#if BUILDFLAG(IS_LINUX)

#if !defined(NDEBUG)
// Use a different IPC name for debug builds so that we can run the host
// directly from out/Debug without interfering with the production host that
// might also be running.
constexpr char kChromotingHostServicesIpcNamePattern[] =
    "chromoting.%s.host_services_debug_mojo_ipc";
#else
constexpr char kChromotingHostServicesIpcNamePattern[] =
    "chromoting.%s.host_services_mojo_ipc";
#endif

#else
constexpr char kChromotingHostServicesIpcName[] =
    "chromoting.host_services_mojo_ipc";
#endif

#if BUILDFLAG(IS_MAC)

#if !defined(NDEBUG)
constexpr char kAgentProcessBrokerIpcName[] =
    "chromoting.agent_process_broker_debug_mojo_ipc";
#else
// Must match the `MachServices` key in org.chromium.chromoting.broker.plist.
constexpr char kAgentProcessBrokerIpcName[] =
    "chromoting.agent_process_broker_mojo_ipc";
#endif

#endif

}  // namespace

const base::FilePath::CharType kHostBinaryName[] =
    FILE_PATH_LITERAL("remoting_host");

const base::FilePath::CharType kDesktopBinaryName[] =
    FILE_PATH_LITERAL("remoting_desktop");

const uint64_t kChromotingHostServicesMessagePipeId = 0u;

bool GetInstalledBinaryPath(const base::FilePath::StringType& binary,
                            base::FilePath* full_path) {
  base::FilePath dir_path;
  if (!base::PathService::Get(base::DIR_EXE, &dir_path)) {
    LOG(ERROR) << "Failed to get the executable file name.";
    return false;
  }

  base::FilePath path = dir_path.Append(binary);

#if BUILDFLAG(IS_WIN)
  path = path.ReplaceExtension(FILE_PATH_LITERAL("exe"));
#endif  // BUILDFLAG(IS_WIN)

  *full_path = path;
  return true;
}

const mojo::NamedPlatformChannel::ServerName&
GetChromotingHostServicesServerName() {
  static const base::NoDestructor<mojo::NamedPlatformChannel::ServerName>
      server_name(
          named_mojo_ipc_server::WorkingDirectoryIndependentServerNameFromUTF8(
#if BUILDFLAG(IS_LINUX)
              // Linux host creates the socket file in /tmp, and it won't be
              // deleted until reboot, so we put username in the path in case
              // the user switches the host owner.
              base::StringPrintf(kChromotingHostServicesIpcNamePattern,
                                 GetUsername().c_str())
#else
              // None of the core Windows processes runs as the host owner so we
              // can't just put username in the path. This is fine since the
              // named pipe is accessible by all authenticated users.
              // On Mac, the channel is managed by the AgentProcessBroker, which
              // runs as root, so we can't put the username in the path either.
              kChromotingHostServicesIpcName
#endif
                  ));
  return *server_name;
}

#if BUILDFLAG(IS_MAC)

const char kAgentProcessBrokerMessagePipeId[] = "agent-process-broker";

const mojo::NamedPlatformChannel::ServerName&
GetAgentProcessBrokerServerName() {
  static const base::NoDestructor<mojo::NamedPlatformChannel::ServerName>
      server_name(
          named_mojo_ipc_server::WorkingDirectoryIndependentServerNameFromUTF8(
              kAgentProcessBrokerIpcName));
  return *server_name;
}

#endif

}  // namespace remoting