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// Copyright (c) 2011 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 "base/sync_socket.h"
#include <stdio.h>
#include <string>
#include <sstream>
#include "base/message_loop.h"
#include "base/process_util.h"
#include "ipc/ipc_channel_proxy.h"
#include "ipc/ipc_tests.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/multiprocess_func_list.h"
#if defined(OS_POSIX)
#include "base/file_descriptor_posix.h"
#endif
// IPC messages for testing ---------------------------------------------------
#define IPC_MESSAGE_IMPL
#include "ipc/ipc_message_macros.h"
#define IPC_MESSAGE_START TestMsgStart
// Message class to pass a base::SyncSocket::Handle to another process. This
// is not as easy as it sounds, because of the differences in transferring
// Windows HANDLEs versus posix file descriptors.
#if defined(OS_WIN)
IPC_MESSAGE_CONTROL1(MsgClassSetHandle, base::SyncSocket::Handle)
#elif defined(OS_POSIX)
IPC_MESSAGE_CONTROL1(MsgClassSetHandle, base::FileDescriptor)
#endif
// Message class to pass a response to the server.
IPC_MESSAGE_CONTROL1(MsgClassResponse, std::string)
// Message class to tell the server to shut down.
IPC_MESSAGE_CONTROL0(MsgClassShutdown)
// ----------------------------------------------------------------------------
namespace {
const char kHelloString[] = "Hello, SyncSocket Client";
const size_t kHelloStringLength = arraysize(kHelloString);
} // namespace
// The SyncSocket server listener class processes two sorts of
// messages from the client.
class SyncSocketServerListener : public IPC::Channel::Listener {
public:
SyncSocketServerListener() : chan_(NULL) {
}
void Init(IPC::Channel* chan) {
chan_ = chan;
}
virtual bool OnMessageReceived(const IPC::Message& msg) {
if (msg.routing_id() == MSG_ROUTING_CONTROL) {
IPC_BEGIN_MESSAGE_MAP(SyncSocketServerListener, msg)
IPC_MESSAGE_HANDLER(MsgClassSetHandle, OnMsgClassSetHandle)
IPC_MESSAGE_HANDLER(MsgClassShutdown, OnMsgClassShutdown)
IPC_END_MESSAGE_MAP()
}
return true;
}
private:
// This sort of message is sent first, causing the transfer of
// the handle for the SyncSocket. This message sends a buffer
// on the SyncSocket and then sends a response to the client.
#if defined(OS_WIN)
void OnMsgClassSetHandle(const base::SyncSocket::Handle handle) {
SetHandle(handle);
}
#elif defined(OS_POSIX)
void OnMsgClassSetHandle(const base::FileDescriptor& fd_struct) {
SetHandle(fd_struct.fd);
}
#else
# error "What platform?"
#endif // defined(OS_WIN)
void SetHandle(base::SyncSocket::Handle handle) {
base::SyncSocket sync_socket(handle);
EXPECT_EQ(sync_socket.Send(static_cast<const void*>(kHelloString),
kHelloStringLength), kHelloStringLength);
IPC::Message* msg = new MsgClassResponse(kHelloString);
EXPECT_TRUE(chan_->Send(msg));
}
// When the client responds, it sends back a shutdown message,
// which causes the message loop to exit.
void OnMsgClassShutdown() {
MessageLoop::current()->Quit();
}
IPC::Channel* chan_;
DISALLOW_COPY_AND_ASSIGN(SyncSocketServerListener);
};
// Runs the fuzzing server child mode. Returns when the preset number
// of messages have been received.
MULTIPROCESS_TEST_MAIN(RunSyncSocketServer) {
MessageLoopForIO main_message_loop;
SyncSocketServerListener listener;
IPC::Channel chan(kSyncSocketChannel, IPC::Channel::MODE_CLIENT, &listener);
EXPECT_TRUE(chan.Connect());
listener.Init(&chan);
MessageLoop::current()->Run();
return 0;
}
// The SyncSocket client listener only processes one sort of message,
// a response from the server.
class SyncSocketClientListener : public IPC::Channel::Listener {
public:
SyncSocketClientListener() {
}
void Init(base::SyncSocket* socket, IPC::Channel* chan) {
socket_ = socket;
chan_ = chan;
}
virtual bool OnMessageReceived(const IPC::Message& msg) {
if (msg.routing_id() == MSG_ROUTING_CONTROL) {
IPC_BEGIN_MESSAGE_MAP(SyncSocketClientListener, msg)
IPC_MESSAGE_HANDLER(MsgClassResponse, OnMsgClassResponse)
IPC_END_MESSAGE_MAP()
}
return true;
}
private:
// When a response is received from the server, it sends the same
// string as was written on the SyncSocket. These are compared
// and a shutdown message is sent back to the server.
void OnMsgClassResponse(const std::string& str) {
// We rely on the order of sync_socket.Send() and chan_->Send() in
// the SyncSocketServerListener object.
EXPECT_EQ(kHelloStringLength, socket_->Peek());
char buf[kHelloStringLength];
socket_->Receive(static_cast<void*>(buf), kHelloStringLength);
EXPECT_EQ(strcmp(str.c_str(), buf), 0);
// After receiving from the socket there should be no bytes left.
EXPECT_EQ(0U, socket_->Peek());
IPC::Message* msg = new MsgClassShutdown();
EXPECT_TRUE(chan_->Send(msg));
MessageLoop::current()->Quit();
}
base::SyncSocket* socket_;
IPC::Channel* chan_;
DISALLOW_COPY_AND_ASSIGN(SyncSocketClientListener);
};
class SyncSocketTest : public IPCChannelTest {
};
TEST_F(SyncSocketTest, SanityTest) {
SyncSocketClientListener listener;
IPC::Channel chan(kSyncSocketChannel, IPC::Channel::MODE_SERVER,
&listener);
base::ProcessHandle server_process = SpawnChild(SYNC_SOCKET_SERVER, &chan);
ASSERT_TRUE(server_process);
// Create a pair of SyncSockets.
base::SyncSocket* pair[2];
base::SyncSocket::CreatePair(pair);
// Immediately after creation there should be no pending bytes.
EXPECT_EQ(0U, pair[0]->Peek());
EXPECT_EQ(0U, pair[1]->Peek());
base::SyncSocket::Handle target_handle;
// Connect the channel and listener.
ASSERT_TRUE(chan.Connect());
listener.Init(pair[0], &chan);
#if defined(OS_WIN)
// On windows we need to duplicate the handle into the server process.
BOOL retval = DuplicateHandle(GetCurrentProcess(), pair[1]->handle(),
server_process, &target_handle,
0, FALSE, DUPLICATE_SAME_ACCESS);
EXPECT_TRUE(retval);
// Set up a message to pass the handle to the server.
IPC::Message* msg = new MsgClassSetHandle(target_handle);
#else
target_handle = pair[1]->handle();
// Set up a message to pass the handle to the server.
base::FileDescriptor filedesc(target_handle, false);
IPC::Message* msg = new MsgClassSetHandle(filedesc);
#endif // defined(OS_WIN)
EXPECT_TRUE(chan.Send(msg));
// Use the current thread as the I/O thread.
MessageLoop::current()->Run();
// Shut down.
delete pair[0];
delete pair[1];
EXPECT_TRUE(base::WaitForSingleProcess(server_process, 5000));
base::CloseProcessHandle(server_process);
}
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