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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/smbfs/smbfs_host.h"
#include <utility>
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/logging.h"
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "chromeos/ash/components/disks/disk_mount_manager.h"
#include "mojo/public/cpp/bindings/receiver.h"
namespace smbfs {
namespace {
class SmbFsDelegateImpl : public mojom::SmbFsDelegate {
public:
SmbFsDelegateImpl(
mojo::PendingReceiver<mojom::SmbFsDelegate> pending_receiver,
base::OnceClosure disconnect_callback,
SmbFsHost::Delegate* delegate)
: receiver_(this, std::move(pending_receiver)), delegate_(delegate) {
receiver_.set_disconnect_handler(std::move(disconnect_callback));
}
SmbFsDelegateImpl(const SmbFsDelegateImpl&) = delete;
SmbFsDelegateImpl& operator=(const SmbFsDelegateImpl&) = delete;
~SmbFsDelegateImpl() override = default;
// mojom::SmbFsDelegate overrides.
void RequestCredentials(RequestCredentialsCallback callback) override {
delegate_->RequestCredentials(
base::BindOnce(&SmbFsDelegateImpl::OnRequestCredentialsDone,
weak_factory_.GetWeakPtr(), std::move(callback)));
}
private:
void OnRequestCredentialsDone(RequestCredentialsCallback callback,
bool cancel,
const std::string& username,
const std::string& workgroup,
const std::string& password) {
if (cancel) {
std::move(callback).Run(nullptr);
return;
}
mojom::CredentialsPtr creds =
mojom::Credentials::New(username, workgroup, nullptr);
if (password.size() > mojom::Password::kMaxLength) {
LOG(WARNING) << "smbfs password too long";
} else if (!password.empty()) {
// Create pipe and write password.
base::ScopedFD pipe_read_end;
base::ScopedFD pipe_write_end;
CHECK(base::CreatePipe(&pipe_read_end, &pipe_write_end,
true /* non_blocking */));
CHECK(base::WriteFileDescriptor(pipe_write_end.get(), password));
creds->password = mojom::Password::New(
mojo::WrapPlatformHandle(
mojo::PlatformHandle(std::move(pipe_read_end))),
static_cast<int32_t>(password.size()));
}
std::move(callback).Run(std::move(creds));
}
mojo::Receiver<mojom::SmbFsDelegate> receiver_;
const raw_ptr<SmbFsHost::Delegate> delegate_;
base::WeakPtrFactory<SmbFsDelegateImpl> weak_factory_{this};
};
} // namespace
SmbFsHost::Delegate::~Delegate() = default;
SmbFsHost::SmbFsHost(
std::unique_ptr<ash::disks::MountPoint> mount_point,
Delegate* delegate,
mojo::Remote<mojom::SmbFs> smbfs_remote,
mojo::PendingReceiver<mojom::SmbFsDelegate> delegate_receiver)
: mount_point_(std::move(mount_point)),
delegate_(delegate),
smbfs_(std::move(smbfs_remote)),
delegate_impl_(std::make_unique<SmbFsDelegateImpl>(
std::move(delegate_receiver),
base::BindOnce(&SmbFsHost::OnDisconnect, base::Unretained(this)),
delegate)) {
DCHECK(mount_point_);
DCHECK(delegate);
smbfs_.set_disconnect_handler(
base::BindOnce(&SmbFsHost::OnDisconnect, base::Unretained(this)));
}
SmbFsHost::~SmbFsHost() = default;
void SmbFsHost::Unmount(SmbFsHost::UnmountCallback callback) {
mount_point_->Unmount(base::BindOnce(
&SmbFsHost::OnUnmountDone, base::Unretained(this), std::move(callback)));
}
void SmbFsHost::OnUnmountDone(SmbFsHost::UnmountCallback callback,
ash::MountError result) {
LOG_IF(ERROR, result != ash::MountError::kSuccess)
<< "Could not unmount smbfs share: " << result;
std::move(callback).Run(result);
}
void SmbFsHost::RemoveSavedCredentials(
SmbFsHost::RemoveSavedCredentialsCallback callback) {
smbfs_->RemoveSavedCredentials(
base::BindOnce(&SmbFsHost::OnRemoveSavedCredentialsDone,
base::Unretained(this), std::move(callback)));
}
void SmbFsHost::OnRemoveSavedCredentialsDone(
SmbFsHost::RemoveSavedCredentialsCallback callback,
bool success) {
LOG_IF(ERROR, !success) << "Unable to remove saved password for smbfs";
std::move(callback).Run(success);
}
void SmbFsHost::OnDisconnect() {
// Ensure only one disconnection event occurs.
smbfs_.reset();
delegate_impl_.reset();
// This may delete us.
delegate_->OnDisconnected();
}
void SmbFsHost::DeleteRecursively(const base::FilePath& path,
DeleteRecursivelyCallback callback) {
smbfs_->DeleteRecursively(
path, base::BindOnce(&SmbFsHost::OnDeleteRecursivelyDone,
base::Unretained(this), std::move(callback)));
}
void SmbFsHost::OnDeleteRecursivelyDone(
DeleteRecursivelyCallback callback,
smbfs::mojom::DeleteRecursivelyError error) {
base::File::Error file_error =
error == smbfs::mojom::DeleteRecursivelyError::kOk
? base::File::FILE_OK
: base::File::FILE_ERROR_FAILED;
std::move(callback).Run(file_error);
}
} // namespace smbfs
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