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// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/test/chromedriver/net/pipe_builder.h"
#include <cstdlib>
#include <memory>
#include <string>
#include <utility>
#include "base/command_line.h"
#include "base/files/file_util.h"
#include "base/files/platform_file.h"
#include "base/strings/string_number_conversions.h"
#include "build/build_config.h"
#include "chrome/test/chromedriver/chrome/status.h"
#include "chrome/test/chromedriver/net/pipe_connection.h"
#include "chrome/test/chromedriver/net/sync_websocket.h"
#if BUILDFLAG(IS_WIN)
#include <windows.h>
#include "base/win/windows_handle_util.h"
#endif
namespace {
#if BUILDFLAG(IS_POSIX)
// The values for kReadFD and kWriteFD come from
// content/browser/devtools/devtools_pipe_handler.cc
constexpr int kReadFD = 3;
constexpr int kWriteFD = 4;
#endif
} // namespace
const char PipeBuilder::kAsciizProtocolMode[] = "asciiz";
const char PipeBuilder::kCborProtocolMode[] = "cbor";
bool PipeBuilder::PlatformIsSupported() {
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_WIN)
return true;
#else
return false;
#endif
}
PipeBuilder::PipeBuilder() = default;
PipeBuilder::~PipeBuilder() = default;
std::unique_ptr<SyncWebSocket> PipeBuilder::TakeSocket() {
return std::unique_ptr<SyncWebSocket>(connection_.release());
}
void PipeBuilder::SetProtocolMode(std::string mode) {
if (mode.empty()) {
mode = kAsciizProtocolMode;
}
protocol_mode_ = mode;
}
Status PipeBuilder::BuildSocket() {
if (protocol_mode_ != kAsciizProtocolMode) {
return Status{kUnknownError, "only ASCIIZ protocol mode is supported"};
}
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_WIN)
if (!read_file_.is_valid() || !write_file_.is_valid()) {
return Status{kUnknownError, "pipes are not initialized"};
}
connection_ = std::make_unique<PipeConnection>(std::move(read_file_),
std::move(write_file_));
return Status{kOk};
#else
return Status{kUnknownError, "pipes are not supported on this platform"};
#endif
}
Status PipeBuilder::CloseChildEndpoints() {
#if BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_WIN)
for (base::ScopedPlatformFile& file : child_ends_) {
file = base::ScopedPlatformFile();
}
return Status{kOk};
#else
return Status{kUnknownError, "pipes are not supported on this platform"};
#endif
}
Status PipeBuilder::SetUpPipes(base::LaunchOptions* options,
base::CommandLine* command) {
if (protocol_mode_ != kAsciizProtocolMode) {
return Status{kUnknownError, "only ASCIIZ protocol mode is supported"};
}
#if BUILDFLAG(IS_POSIX)
base::ScopedFD parent_read;
base::ScopedFD child_write;
base::ScopedFD child_read;
base::ScopedFD parent_write;
if (!CreatePipe(&parent_read, &child_write, false) ||
!CreatePipe(&child_read, &parent_write, false) ||
// the local ends must be closed in the child process
!base::SetCloseOnExec(parent_read.get()) ||
!base::SetCloseOnExec(parent_write.get())) {
return Status{kUnknownError, "unable to setup a pipe"};
}
options->fds_to_remap.emplace_back(child_read.get(), kReadFD);
options->fds_to_remap.emplace_back(child_write.get(), kWriteFD);
read_file_ = std::move(parent_read);
write_file_ = std::move(parent_write);
child_ends_[0] = std::move(child_read);
child_ends_[1] = std::move(child_write);
return Status{kOk};
#elif BUILDFLAG(IS_WIN)
HANDLE child_read_handle;
HANDLE parent_write_handle;
HANDLE parent_read_handle;
HANDLE child_write_handle;
if (!CreatePipe(&child_read_handle, &parent_write_handle, nullptr, 0)) {
return Status{kUnknownError, "unable to setup a pipe"};
}
base::win::ScopedHandle child_read(child_read_handle);
base::win::ScopedHandle parent_write(parent_write_handle);
if (!CreatePipe(&parent_read_handle, &child_write_handle, nullptr, 0)) {
return Status{kUnknownError, "unable to setup a pipe"};
}
base::win::ScopedHandle parent_read(parent_read_handle);
base::win::ScopedHandle child_write(child_write_handle);
std::string in_pipe_name =
base::NumberToString(base::win::HandleToUint32(child_read.get()));
std::string out_pipe_name =
base::NumberToString(base::win::HandleToUint32(child_write.get()));
// We use the fact that inherited handles in the child process have the same
// value and access rights as in the parent process.
// See:
// https://learn.microsoft.com/en-us/windows/win32/api/processthreadsapi/nf-processthreadsapi-createprocessa
command->AppendSwitchASCII("remote-debugging-io-pipes",
in_pipe_name + "," + out_pipe_name);
options->handles_to_inherit.push_back(child_read.get());
options->handles_to_inherit.push_back(child_write.get());
read_file_ = std::move(parent_read);
write_file_ = std::move(parent_write);
child_ends_[0] = std::move(child_read);
child_ends_[1] = std::move(child_write);
return Status{kOk};
#else
return Status{kUnknownError, "pipes are not supported on this platform"};
#endif
}
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