blob: f5cda65159a8a0e4b06f5c924ce0d330a0786cc6 [file] [log] [blame]
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "apps/app_shim/unix_domain_socket_acceptor.h"
#include "base/files/file_util.h"
#include "base/files/scoped_file.h"
#include "base/logging.h"
#include "ipc/unix_domain_socket_util.h"
namespace apps {
UnixDomainSocketAcceptor::UnixDomainSocketAcceptor(const base::FilePath& path,
Delegate* delegate)
: path_(path), delegate_(delegate), listen_fd_(-1) {
DCHECK(delegate_);
CreateSocket();
}
UnixDomainSocketAcceptor::~UnixDomainSocketAcceptor() {
Close();
}
bool UnixDomainSocketAcceptor::CreateSocket() {
DCHECK(listen_fd_ < 0);
// Create the socket.
return IPC::CreateServerUnixDomainSocket(path_, &listen_fd_);
}
bool UnixDomainSocketAcceptor::Listen() {
if (listen_fd_ < 0)
return false;
// Watch the fd for connections, and turn any connections into
// active sockets.
base::MessageLoopForIO::current()->WatchFileDescriptor(
listen_fd_,
true,
base::MessageLoopForIO::WATCH_READ,
&server_listen_connection_watcher_,
this);
return true;
}
// Called by libevent when we can read from the fd without blocking.
void UnixDomainSocketAcceptor::OnFileCanReadWithoutBlocking(int fd) {
DCHECK(fd == listen_fd_);
int new_fd = -1;
if (!IPC::ServerAcceptConnection(listen_fd_, &new_fd)) {
Close();
delegate_->OnListenError();
return;
}
base::ScopedFD scoped_fd(new_fd);
if (!scoped_fd.is_valid()) {
// The accept() failed, but not in such a way that the factory needs to be
// shut down.
return;
}
// Verify that the IPC channel peer is running as the same user.
if (!IPC::IsPeerAuthorized(scoped_fd.get()))
return;
IPC::ChannelHandle handle(std::string(),
base::FileDescriptor(scoped_fd.release(), true));
delegate_->OnClientConnected(handle);
}
void UnixDomainSocketAcceptor::OnFileCanWriteWithoutBlocking(int fd) {
NOTREACHED() << "Listen fd should never be writable.";
}
void UnixDomainSocketAcceptor::Close() {
if (listen_fd_ < 0)
return;
if (IGNORE_EINTR(close(listen_fd_)) < 0)
PLOG(ERROR) << "close";
listen_fd_ = -1;
if (unlink(path_.value().c_str()) < 0)
PLOG(ERROR) << "unlink";
// Unregister libevent for the listening socket and close it.
server_listen_connection_watcher_.StopWatchingFileDescriptor();
}
} // namespace apps