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authorjeremya@chromium.org <jeremya@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2013-03-11 04:17:17 +0000
committerjeremya@chromium.org <jeremya@chromium.org@0039d316-1c4b-4281-b951-d872f2087c98>2013-03-11 04:17:17 +0000
commit3cfcda39679d94a12a7494dd4a73dc32c37dfce8 (patch)
tree5bd4ea646b094f481d183552bc3b924dd5b3a8ba /ipc/ipc_channel_factory.cc
parent8e97f014e47198ff1475bc5e9c57e4280a8bc18c (diff)
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Implement IPC::ChannelFactory, a class that accept()s on a UNIX socket.
IPC::ChannelFactory listens on a UNIX domain socket and notifies its delegate when a client connects. The delegate is expected to craft an IPC::Channel from the handle it is given. Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=186912 Review URL: https://chromiumcodereview.appspot.com/12386010 git-svn-id: svn://svn.chromium.org/chrome/trunk/src@187233 0039d316-1c4b-4281-b951-d872f2087c98
Diffstat (limited to 'ipc/ipc_channel_factory.cc')
-rw-r--r--ipc/ipc_channel_factory.cc88
1 files changed, 88 insertions, 0 deletions
diff --git a/ipc/ipc_channel_factory.cc b/ipc/ipc_channel_factory.cc
new file mode 100644
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+++ b/ipc/ipc_channel_factory.cc
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+// Copyright 2013 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 "ipc/ipc_channel_factory.h"
+
+#include "base/file_util.h"
+#include "base/logging.h"
+#include "ipc/unix_domain_socket_util.h"
+
+namespace IPC {
+
+ChannelFactory::ChannelFactory(const base::FilePath& path, Delegate* delegate)
+ : path_(path), delegate_(delegate), listen_fd_(-1) {
+ DCHECK(delegate_);
+ CreateSocket();
+}
+
+ChannelFactory::~ChannelFactory() {
+ Close();
+}
+
+bool ChannelFactory::CreateSocket() {
+ DCHECK(listen_fd_ < 0);
+
+ // Create the socket.
+ return CreateServerUnixDomainSocket(path_, &listen_fd_);
+}
+
+bool ChannelFactory::Listen() {
+ if (listen_fd_ < 0)
+ return false;
+
+ // Watch the fd for connections, and turn any connections into
+ // active sockets.
+ MessageLoopForIO::current()->WatchFileDescriptor(
+ listen_fd_,
+ true,
+ MessageLoopForIO::WATCH_READ,
+ &server_listen_connection_watcher_,
+ this);
+ return true;
+}
+
+// Called by libevent when we can read from the fd without blocking.
+void ChannelFactory::OnFileCanReadWithoutBlocking(int fd) {
+ DCHECK(fd == listen_fd_);
+ int new_fd = -1;
+ if (!ServerAcceptConnection(listen_fd_, &new_fd)) {
+ Close();
+ delegate_->OnListenError();
+ return;
+ }
+
+ if (new_fd < 0) {
+ // The accept() failed, but not in such a way that the factory needs to be
+ // shut down.
+ return;
+ }
+
+ file_util::ScopedFD scoped_fd(&new_fd);
+
+ // Verify that the IPC channel peer is running as the same user.
+ if (!IsPeerAuthorized(new_fd))
+ return;
+
+ ChannelHandle handle("", base::FileDescriptor(*scoped_fd.release(), true));
+ delegate_->OnClientConnected(handle);
+}
+
+void ChannelFactory::OnFileCanWriteWithoutBlocking(int fd) {
+ NOTREACHED() << "Listen fd should never be writable.";
+}
+
+void ChannelFactory::Close() {
+ if (listen_fd_ < 0)
+ return;
+ if (HANDLE_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 IPC