// Copyright (c) 2006-2009 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 "net/socket/tcp_client_socket.h"
#include "base/basictypes.h"
#include "net/base/address_list.h"
#include "net/base/host_resolver.h"
#include "net/base/io_buffer.h"
#include "net/base/listen_socket.h"
#include "net/base/load_log.h"
#include "net/base/load_log_unittest.h"
#include "net/base/net_errors.h"
#include "net/base/test_completion_callback.h"
#include "net/base/winsock_init.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/platform_test.h"
namespace net {
namespace {
const char kServerReply[] = "HTTP/1.1 404 Not Found";
class TCPClientSocketTest
: public PlatformTest, public ListenSocket::ListenSocketDelegate {
public:
TCPClientSocketTest() {
}
// Implement ListenSocketDelegate methods
virtual void DidAccept(ListenSocket* server, ListenSocket* connection) {
connected_sock_ = connection;
}
virtual void DidRead(ListenSocket*, const std::string& s) {
// TODO(dkegel): this might not be long enough to tickle some bugs.
connected_sock_->Send(kServerReply,
arraysize(kServerReply) - 1,
false /* don't append line feed */);
}
virtual void DidClose(ListenSocket* sock) {}
// Testcase hooks
virtual void SetUp();
void CloseServerSocket() {
// delete the connected_sock_, which will close it.
connected_sock_ = NULL;
}
void PauseServerReads() {
connected_sock_->PauseReads();
}
void ResumeServerReads() {
connected_sock_->ResumeReads();
}
protected:
int listen_port_;
scoped_ptr<TCPClientSocket> sock_;
private:
scoped_refptr<ListenSocket> listen_sock_;
scoped_refptr<ListenSocket> connected_sock_;
};
void TCPClientSocketTest::SetUp() {
PlatformTest::SetUp();
// Find a free port to listen on
ListenSocket *sock = NULL;
int port;
// Range of ports to listen on. Shouldn't need to try many.
const int kMinPort = 10100;
const int kMaxPort = 10200;
#if defined(OS_WIN)
EnsureWinsockInit();
#endif
for (port = kMinPort; port < kMaxPort; port++) {
sock = ListenSocket::Listen("127.0.0.1", port, this);
if (sock)
break;
}
ASSERT_TRUE(sock != NULL);
listen_sock_ = sock;
listen_port_ = port;
AddressList addr;
scoped_refptr<HostResolver> resolver(CreateSystemHostResolver(NULL));
HostResolver::RequestInfo info("localhost", listen_port_);
int rv = resolver->Resolve(info, &addr, NULL, NULL, NULL);
CHECK(rv == OK);
sock_.reset(new TCPClientSocket(addr));
}
TEST_F(TCPClientSocketTest, Connect) {
TestCompletionCallback callback;
EXPECT_FALSE(sock_->IsConnected());
scoped_refptr<LoadLog> log(new LoadLog(LoadLog::kUnbounded));
int rv = sock_->Connect(&callback, log);
EXPECT_TRUE(net::LogContainsBeginEvent(
*log, 0, net::LoadLog::TYPE_TCP_CONNECT));
if (rv != OK) {
ASSERT_EQ(rv, ERR_IO_PENDING);
EXPECT_FALSE(net::LogContainsEndEvent(
*log, -1, net::LoadLog::TYPE_TCP_CONNECT));
rv = callback.WaitForResult();
EXPECT_EQ(rv, OK);
}
EXPECT_TRUE(sock_->IsConnected());
EXPECT_TRUE(net::LogContainsEndEvent(
*log, -1, net::LoadLog::TYPE_TCP_CONNECT));
sock_->Disconnect();
EXPECT_FALSE(sock_->IsConnected());
}
// TODO(wtc): Add unit tests for IsConnectedAndIdle:
// - Server closes a connection.
// - Server sends data unexpectedly.
TEST_F(TCPClientSocketTest, Read) {
TestCompletionCallback callback;
int rv = sock_->Connect(&callback, NULL);
if (rv != OK) {
ASSERT_EQ(rv, ERR_IO_PENDING);
rv = callback.WaitForResult();
EXPECT_EQ(rv, OK);
}
const char request_text[] = "GET / HTTP/1.0\r\n\r\n";
scoped_refptr<IOBuffer> request_buffer =
new IOBuffer(arraysize(request_text) - 1);
memcpy(request_buffer->data(), request_text, arraysize(request_text) - 1);
rv = sock_->Write(request_buffer, arraysize(request_text) - 1, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING) {
rv = callback.WaitForResult();
EXPECT_EQ(rv, static_cast<int>(arraysize(request_text) - 1));
}
scoped_refptr<IOBuffer> buf = new IOBuffer(4096);
uint32 bytes_read = 0;
while (bytes_read < arraysize(kServerReply) - 1) {
rv = sock_->Read(buf, 4096, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING)
rv = callback.WaitForResult();
ASSERT_GE(rv, 0);
bytes_read += rv;
}
// All data has been read now. Read once more to force an ERR_IO_PENDING, and
// then close the server socket, and note the close.
rv = sock_->Read(buf, 4096, &callback);
ASSERT_EQ(ERR_IO_PENDING, rv);
CloseServerSocket();
EXPECT_EQ(0, callback.WaitForResult());
}
TEST_F(TCPClientSocketTest, Read_SmallChunks) {
TestCompletionCallback callback;
int rv = sock_->Connect(&callback, NULL);
if (rv != OK) {
ASSERT_EQ(rv, ERR_IO_PENDING);
rv = callback.WaitForResult();
EXPECT_EQ(rv, OK);
}
const char request_text[] = "GET / HTTP/1.0\r\n\r\n";
scoped_refptr<IOBuffer> request_buffer =
new IOBuffer(arraysize(request_text) - 1);
memcpy(request_buffer->data(), request_text, arraysize(request_text) - 1);
rv = sock_->Write(request_buffer, arraysize(request_text) - 1, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING) {
rv = callback.WaitForResult();
EXPECT_EQ(rv, static_cast<int>(arraysize(request_text) - 1));
}
scoped_refptr<IOBuffer> buf = new IOBuffer(1);
uint32 bytes_read = 0;
while (bytes_read < arraysize(kServerReply) - 1) {
rv = sock_->Read(buf, 1, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING)
rv = callback.WaitForResult();
ASSERT_EQ(1, rv);
bytes_read += rv;
}
// All data has been read now. Read once more to force an ERR_IO_PENDING, and
// then close the server socket, and note the close.
rv = sock_->Read(buf, 1, &callback);
ASSERT_EQ(ERR_IO_PENDING, rv);
CloseServerSocket();
EXPECT_EQ(0, callback.WaitForResult());
}
TEST_F(TCPClientSocketTest, Read_Interrupted) {
TestCompletionCallback callback;
int rv = sock_->Connect(&callback, NULL);
if (rv != OK) {
ASSERT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(rv, OK);
}
const char request_text[] = "GET / HTTP/1.0\r\n\r\n";
scoped_refptr<IOBuffer> request_buffer =
new IOBuffer(arraysize(request_text) - 1);
memcpy(request_buffer->data(), request_text, arraysize(request_text) - 1);
rv = sock_->Write(request_buffer, arraysize(request_text) - 1, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING) {
rv = callback.WaitForResult();
EXPECT_EQ(rv, static_cast<int>(arraysize(request_text) - 1));
}
// Do a partial read and then exit. This test should not crash!
scoped_refptr<IOBuffer> buf = new IOBuffer(16);
rv = sock_->Read(buf, 16, &callback);
EXPECT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING)
rv = callback.WaitForResult();
EXPECT_NE(0, rv);
}
TEST_F(TCPClientSocketTest, DISABLED_FullDuplex_ReadFirst) {
TestCompletionCallback callback;
int rv = sock_->Connect(&callback, NULL);
if (rv != OK) {
ASSERT_EQ(rv, ERR_IO_PENDING);
rv = callback.WaitForResult();
EXPECT_EQ(rv, OK);
}
// Read first. There's no data, so it should return ERR_IO_PENDING.
const int kBufLen = 4096;
scoped_refptr<IOBuffer> buf = new IOBuffer(kBufLen);
rv = sock_->Read(buf, kBufLen, &callback);
EXPECT_EQ(ERR_IO_PENDING, rv);
PauseServerReads();
const int kWriteBufLen = 64 * 1024;
scoped_refptr<IOBuffer> request_buffer = new IOBuffer(kWriteBufLen);
char* request_data = request_buffer->data();
memset(request_data, 'A', kWriteBufLen);
TestCompletionCallback write_callback;
while (true) {
rv = sock_->Write(request_buffer, kWriteBufLen, &write_callback);
ASSERT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING) {
ResumeServerReads();
rv = write_callback.WaitForResult();
break;
}
}
// At this point, both read and write have returned ERR_IO_PENDING, and the
// write callback has executed. We wait for the read callback to run now to
// make sure that the socket can handle full duplex communications.
rv = callback.WaitForResult();
EXPECT_GE(rv, 0);
}
TEST_F(TCPClientSocketTest, DISABLED_FullDuplex_WriteFirst) {
TestCompletionCallback callback;
int rv = sock_->Connect(&callback, NULL);
if (rv != OK) {
ASSERT_EQ(ERR_IO_PENDING, rv);
rv = callback.WaitForResult();
EXPECT_EQ(OK, rv);
}
PauseServerReads();
const int kWriteBufLen = 64 * 1024;
scoped_refptr<IOBuffer> request_buffer = new IOBuffer(kWriteBufLen);
char* request_data = request_buffer->data();
memset(request_data, 'A', kWriteBufLen);
TestCompletionCallback write_callback;
while (true) {
rv = sock_->Write(request_buffer, kWriteBufLen, &write_callback);
ASSERT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING)
break;
}
// Now we have the Write() blocked on ERR_IO_PENDING. It's time to force the
// Read() to block on ERR_IO_PENDING too.
const int kBufLen = 4096;
scoped_refptr<IOBuffer> buf = new IOBuffer(kBufLen);
while (true) {
rv = sock_->Read(buf, kBufLen, &callback);
ASSERT_TRUE(rv >= 0 || rv == ERR_IO_PENDING);
if (rv == ERR_IO_PENDING)
break;
}
// At this point, both read and write have returned ERR_IO_PENDING. Now we
// run the write and read callbacks to make sure they can handle full duplex
// communications.
ResumeServerReads();
rv = write_callback.WaitForResult();
EXPECT_GE(rv, 0);
// It's possible the read is blocked because it's already read all the data.
// Close the server socket, so there will at least be a 0-byte read.
CloseServerSocket();
rv = callback.WaitForResult();
EXPECT_GE(rv, 0);
}
} // namespace
} // namespace net