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Issue 12431017: Revert 187554 "Implement IPC::ChannelFactory, a class that accep..." (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src/
Patch Set: Created 7 years, 9 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "ipc/ipc_channel_factory.h"
6
7 #include "base/file_util.h"
8 #include "base/logging.h"
9 #include "ipc/unix_domain_socket_util.h"
10
11 namespace IPC {
12
13 ChannelFactory::ChannelFactory(const base::FilePath& path, Delegate* delegate)
14 : path_(path), delegate_(delegate), listen_fd_(-1) {
15 DCHECK(delegate_);
16 CreateSocket();
17 }
18
19 ChannelFactory::~ChannelFactory() {
20 Close();
21 }
22
23 bool ChannelFactory::CreateSocket() {
24 DCHECK(listen_fd_ < 0);
25
26 // Create the socket.
27 return CreateServerUnixDomainSocket(path_, &listen_fd_);
28 }
29
30 bool ChannelFactory::Listen() {
31 if (listen_fd_ < 0)
32 return false;
33
34 // Watch the fd for connections, and turn any connections into
35 // active sockets.
36 MessageLoopForIO::current()->WatchFileDescriptor(
37 listen_fd_,
38 true,
39 MessageLoopForIO::WATCH_READ,
40 &server_listen_connection_watcher_,
41 this);
42 return true;
43 }
44
45 // Called by libevent when we can read from the fd without blocking.
46 void ChannelFactory::OnFileCanReadWithoutBlocking(int fd) {
47 DCHECK(fd == listen_fd_);
48 int new_fd = -1;
49 if (!ServerAcceptConnection(listen_fd_, &new_fd)) {
50 Close();
51 delegate_->OnListenError();
52 return;
53 }
54
55 if (new_fd < 0) {
56 // The accept() failed, but not in such a way that the factory needs to be
57 // shut down.
58 return;
59 }
60
61 file_util::ScopedFD scoped_fd(&new_fd);
62
63 // Verify that the IPC channel peer is running as the same user.
64 if (!IsPeerAuthorized(new_fd))
65 return;
66
67 ChannelHandle handle("", base::FileDescriptor(*scoped_fd.release(), true));
68 delegate_->OnClientConnected(handle);
69 }
70
71 void ChannelFactory::OnFileCanWriteWithoutBlocking(int fd) {
72 NOTREACHED() << "Listen fd should never be writable.";
73 }
74
75 void ChannelFactory::Close() {
76 if (listen_fd_ < 0)
77 return;
78 if (HANDLE_EINTR(close(listen_fd_)) < 0)
79 PLOG(ERROR) << "close";
80 listen_fd_ = -1;
81 if (unlink(path_.value().c_str()) < 0)
82 PLOG(ERROR) << "unlink";
83
84 // Unregister libevent for the listening socket and close it.
85 server_listen_connection_watcher_.StopWatchingFileDescriptor();
86 }
87
88 } // namespace IPC
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