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// Copyright 2015 The Cobalt Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// SendTo is largely tested with ReceiveFrom, so look there for more involved
// tests.
#include <utility>
#include "starboard/common/socket.h"
#include "starboard/memory.h"
#include "starboard/nplb/socket_helpers.h"
#include "starboard/thread.h"
#include "starboard/time.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace starboard {
namespace nplb {
namespace {
class PairSbSocketSendToTest
: public ::testing::TestWithParam<
std::pair<SbSocketAddressType, SbSocketAddressType> > {
public:
SbSocketAddressType GetServerAddressType() { return GetParam().first; }
SbSocketAddressType GetClientAddressType() { return GetParam().second; }
};
// Thread entry point to continuously write to a socket that is expected to
// be closed on another thread.
void* SendToServerSocketEntryPoint(void* trio_as_void_ptr) {
ConnectedTrio* trio = static_cast<ConnectedTrio*>(trio_as_void_ptr);
// The contents of this buffer are inconsequential.
const size_t kBufSize = 1024;
char* send_buf = new char[kBufSize];
memset(send_buf, 0, kBufSize);
// Continue sending to the socket until it fails to send. It's expected that
// SbSocketSendTo will fail when the server socket closes, but the application
// should not terminate.
SbTime start = SbTimeGetMonotonicNow();
SbTime now = start;
SbTime kTimeout = kSbTimeSecond;
int result = 0;
while (result >= 0 && (now - start < kTimeout)) {
result = SbSocketSendTo(trio->server_socket, send_buf, kBufSize, NULL);
now = SbTimeGetMonotonicNow();
}
delete[] send_buf;
return NULL;
}
TEST(SbSocketSendToTest, RainyDayInvalidSocket) {
char buf[16];
int result = SbSocketSendTo(NULL, buf, sizeof(buf), NULL);
EXPECT_EQ(-1, result);
}
TEST(SbSocketSendToTest, RainyDayUnconnectedSocket) {
SbSocket socket =
SbSocketCreate(kSbSocketAddressTypeIpv4, kSbSocketProtocolTcp);
ASSERT_TRUE(SbSocketIsValid(socket));
char buf[16];
int result = SbSocketSendTo(socket, buf, sizeof(buf), NULL);
EXPECT_EQ(-1, result);
EXPECT_SB_SOCKET_ERROR_IN(SbSocketGetLastError(socket),
kSbSocketErrorConnectionReset,
kSbSocketErrorFailed);
EXPECT_TRUE(SbSocketDestroy(socket));
}
TEST_P(PairSbSocketSendToTest, RainyDaySendToClosedSocket) {
ConnectedTrio trio =
CreateAndConnect(GetServerAddressType(), GetClientAddressType(),
GetPortNumberForTests(), kSocketTimeout);
EXPECT_NE(trio.client_socket, kSbSocketInvalid);
EXPECT_NE(trio.server_socket, kSbSocketInvalid);
EXPECT_NE(trio.listen_socket, kSbSocketInvalid);
// We don't need the listen socket, so close it.
EXPECT_TRUE(SbSocketDestroy(trio.listen_socket));
// Start a thread to write to the client socket.
const bool kJoinable = true;
SbThread send_thread = SbThreadCreate(
0, kSbThreadNoPriority, kSbThreadNoAffinity, kJoinable, "SendToTest",
SendToServerSocketEntryPoint, static_cast<void*>(&trio));
// Close the client, which should cause writes to the server socket to fail.
EXPECT_TRUE(SbSocketDestroy(trio.client_socket));
// Wait for the thread to exit and check the last socket error.
void* thread_result;
EXPECT_TRUE(SbThreadJoin(send_thread, &thread_result));
EXPECT_SB_SOCKET_ERROR_IN(SbSocketGetLastError(trio.server_socket),
kSbSocketErrorConnectionReset,
kSbSocketErrorFailed);
// Clean up the server socket.
EXPECT_TRUE(SbSocketDestroy(trio.server_socket));
}
// Tests the expectation that writing to a socket that is never drained
// will result in that socket becoming full and thus will return a
// kSbSocketPending status, which indicates that it is blocked.
TEST_P(PairSbSocketSendToTest, RainyDaySendToSocketUntilBlocking) {
static const int kChunkSize = 1024;
// 1GB limit for sending data.
static const uint64_t kMaxTransferLimit = 1024 * 1024 * 1024;
scoped_ptr<ConnectedTrioWrapped> trio =
CreateAndConnectWrapped(GetServerAddressType(), GetClientAddressType(),
GetPortNumberForTests(), kSocketTimeout);
ASSERT_TRUE(trio);
// Push data into socket until it dies.
uint64_t num_bytes = 0;
while (num_bytes < kMaxTransferLimit) {
char buff[kChunkSize] = {};
int result = trio->client_socket->SendTo(buff, sizeof(buff), NULL);
if (result < 0) {
SbSocketError err = SbSocketGetLastError(trio->client_socket->socket());
EXPECT_EQ(kSbSocketPending, err);
return;
}
if (result == 0) { // Connection dropped unexpectedly.
EXPECT_TRUE(false) << "Connection unexpectedly dropped.";
}
num_bytes += static_cast<uint64_t>(result);
}
EXPECT_TRUE(false) << "Max transfer rate reached.";
}
// Tests the expectation that killing a connection will cause the other
// connected socket to fail to write. For sockets without socket connection
// support this will show up as a generic error. Otherwise this will show
// up as a connection reset error.
TEST_P(PairSbSocketSendToTest, RainyDaySendToSocketConnectionReset) {
static const int kChunkSize = 1024;
scoped_ptr<ConnectedTrioWrapped> trio =
CreateAndConnectWrapped(GetServerAddressType(), GetClientAddressType(),
GetPortNumberForTests(), kSocketTimeout);
ASSERT_TRUE(trio);
// Kills the server, the client socket will have it's connection reset during
// one of the subsequent writes.
trio->server_socket.reset();
// Expect that after some retries the client socket will return that the
// connection will reset.
int kNumRetries = 1000;
for (int i = 0; i < kNumRetries; ++i) {
char buff[kChunkSize] = {};
SbThreadSleep(kSbTimeMillisecond);
int result = trio->client_socket->SendTo(buff, sizeof(buff), NULL);
if (result < 0) {
SbSocketError err = SbSocketGetLastError(trio->client_socket->socket());
EXPECT_EQ(kSbSocketErrorConnectionReset, err)
<< "Expected connection drop.";
return;
}
if (result == 0) {
return; // Other way in which the connection was reset.
}
}
ASSERT_TRUE(false) << "Connection was not dropped after " << kNumRetries
<< " tries.";
}
#if SB_HAS(IPV6)
INSTANTIATE_TEST_CASE_P(
SbSocketAddressTypes,
PairSbSocketSendToTest,
::testing::Values(
std::make_pair(kSbSocketAddressTypeIpv4, kSbSocketAddressTypeIpv4),
std::make_pair(kSbSocketAddressTypeIpv6, kSbSocketAddressTypeIpv6),
std::make_pair(kSbSocketAddressTypeIpv6, kSbSocketAddressTypeIpv4)));
#else
INSTANTIATE_TEST_CASE_P(
SbSocketAddressTypes,
PairSbSocketSendToTest,
::testing::Values(std::make_pair(kSbSocketAddressTypeIpv4,
kSbSocketAddressTypeIpv4)));
#endif
} // namespace
} // namespace nplb
} // namespace starboard