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/*
* Copyright 2009 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include <memory>
#include "p2p/base/basic_packet_socket_factory.h"
#include "p2p/base/stun_port.h"
#include "p2p/base/test_stun_server.h"
#include "rtc_base/gunit.h"
#include "rtc_base/helpers.h"
#include "rtc_base/socket_address.h"
#include "rtc_base/ssl_adapter.h"
#include "rtc_base/virtual_socket_server.h"
#include "test/gmock.h"
using cricket::ServerAddresses;
using rtc::SocketAddress;
using ::testing::_;
using ::testing::Return;
static const SocketAddress kLocalAddr("127.0.0.1", 0);
static const SocketAddress kStunAddr1("127.0.0.1", 5000);
static const SocketAddress kStunAddr2("127.0.0.1", 4000);
static const SocketAddress kStunAddr3("127.0.0.1", 3000);
static const SocketAddress kBadAddr("0.0.0.1", 5000);
static const SocketAddress kStunHostnameAddr("localhost", 5000);
static const SocketAddress kBadHostnameAddr("not-a-real-hostname", 5000);
// STUN timeout (with all retries) is cricket::STUN_TOTAL_TIMEOUT.
// Add some margin of error for slow bots.
static const int kTimeoutMs = cricket::STUN_TOTAL_TIMEOUT;
// stun prio = 100 << 24 | 30 (IPV4) << 8 | 256 - 0
static const uint32_t kStunCandidatePriority = 1677729535;
static const int kInfiniteLifetime = -1;
static const int kHighCostPortKeepaliveLifetimeMs = 2 * 60 * 1000;
// Tests connecting a StunPort to a fake STUN server (cricket::StunServer)
class StunPortTestBase : public ::testing::Test, public sigslot::has_slots<> {
public:
StunPortTestBase()
: ss_(new rtc::VirtualSocketServer()),
thread_(ss_.get()),
network_("unittest", "unittest", kLocalAddr.ipaddr(), 32),
socket_factory_(rtc::Thread::Current()),
stun_server_1_(cricket::TestStunServer::Create(rtc::Thread::Current(),
kStunAddr1)),
stun_server_2_(cricket::TestStunServer::Create(rtc::Thread::Current(),
kStunAddr2)),
done_(false),
error_(false),
stun_keepalive_delay_(1),
stun_keepalive_lifetime_(-1) {
network_.AddIP(kLocalAddr.ipaddr());
}
cricket::UDPPort* port() const { return stun_port_.get(); }
rtc::AsyncPacketSocket* socket() const { return socket_.get(); }
bool done() const { return done_; }
bool error() const { return error_; }
void SetNetworkType(rtc::AdapterType adapter_type) {
network_.set_type(adapter_type);
}
void CreateStunPort(const rtc::SocketAddress& server_addr) {
ServerAddresses stun_servers;
stun_servers.insert(server_addr);
CreateStunPort(stun_servers);
}
void CreateStunPort(const ServerAddresses& stun_servers) {
stun_port_ = cricket::StunPort::Create(
rtc::Thread::Current(), &socket_factory_, &network_, 0, 0,
rtc::CreateRandomString(16), rtc::CreateRandomString(22), stun_servers,
std::string(), absl::nullopt);
stun_port_->set_stun_keepalive_delay(stun_keepalive_delay_);
// If |stun_keepalive_lifetime_| is negative, let the stun port
// choose its lifetime from the network type.
if (stun_keepalive_lifetime_ >= 0) {
stun_port_->set_stun_keepalive_lifetime(stun_keepalive_lifetime_);
}
stun_port_->SignalPortComplete.connect(this,
&StunPortTestBase::OnPortComplete);
stun_port_->SignalPortError.connect(this, &StunPortTestBase::OnPortError);
}
void CreateSharedUdpPort(const rtc::SocketAddress& server_addr,
rtc::AsyncPacketSocket* socket) {
if (socket) {
socket_.reset(socket);
} else {
socket_.reset(socket_factory_.CreateUdpSocket(
rtc::SocketAddress(kLocalAddr.ipaddr(), 0), 0, 0));
}
ASSERT_TRUE(socket_ != NULL);
socket_->SignalReadPacket.connect(this, &StunPortTestBase::OnReadPacket);
stun_port_ = cricket::UDPPort::Create(
rtc::Thread::Current(), &socket_factory_, &network_, socket_.get(),
rtc::CreateRandomString(16), rtc::CreateRandomString(22), std::string(),
false, absl::nullopt);
ASSERT_TRUE(stun_port_ != NULL);
ServerAddresses stun_servers;
stun_servers.insert(server_addr);
stun_port_->set_server_addresses(stun_servers);
stun_port_->SignalPortComplete.connect(this,
&StunPortTestBase::OnPortComplete);
stun_port_->SignalPortError.connect(this, &StunPortTestBase::OnPortError);
}
void PrepareAddress() { stun_port_->PrepareAddress(); }
void OnReadPacket(rtc::AsyncPacketSocket* socket,
const char* data,
size_t size,
const rtc::SocketAddress& remote_addr,
const int64_t& /* packet_time_us */) {
stun_port_->HandleIncomingPacket(socket, data, size, remote_addr,
/* packet_time_us */ -1);
}
void SendData(const char* data, size_t len) {
stun_port_->HandleIncomingPacket(socket_.get(), data, len,
rtc::SocketAddress("22.22.22.22", 0),
/* packet_time_us */ -1);
}
protected:
static void SetUpTestCase() {
// Ensure the RNG is inited.
rtc::InitRandom(NULL, 0);
}
void OnPortComplete(cricket::Port* port) {
ASSERT_FALSE(done_);
done_ = true;
error_ = false;
}
void OnPortError(cricket::Port* port) {
done_ = true;
error_ = true;
}
void SetKeepaliveDelay(int delay) { stun_keepalive_delay_ = delay; }
void SetKeepaliveLifetime(int lifetime) {
stun_keepalive_lifetime_ = lifetime;
}
cricket::TestStunServer* stun_server_1() { return stun_server_1_.get(); }
cricket::TestStunServer* stun_server_2() { return stun_server_2_.get(); }
private:
std::unique_ptr<rtc::VirtualSocketServer> ss_;
rtc::AutoSocketServerThread thread_;
rtc::Network network_;
rtc::BasicPacketSocketFactory socket_factory_;
std::unique_ptr<cricket::UDPPort> stun_port_;
std::unique_ptr<cricket::TestStunServer> stun_server_1_;
std::unique_ptr<cricket::TestStunServer> stun_server_2_;
std::unique_ptr<rtc::AsyncPacketSocket> socket_;
bool done_;
bool error_;
int stun_keepalive_delay_;
int stun_keepalive_lifetime_;
};
class StunPortTestWithRealClock : public StunPortTestBase {};
class FakeClockBase {
public:
rtc::ScopedFakeClock fake_clock;
};
class StunPortTest : public FakeClockBase, public StunPortTestBase {};
// Test that we can create a STUN port.
TEST_F(StunPortTest, TestCreateStunPort) {
CreateStunPort(kStunAddr1);
EXPECT_EQ("stun", port()->Type());
EXPECT_EQ(0U, port()->Candidates().size());
}
// Test that we can create a UDP port.
TEST_F(StunPortTest, TestCreateUdpPort) {
CreateSharedUdpPort(kStunAddr1, nullptr);
EXPECT_EQ("local", port()->Type());
EXPECT_EQ(0U, port()->Candidates().size());
}
// Test that we can get an address from a STUN server.
TEST_F(StunPortTest, TestPrepareAddress) {
CreateStunPort(kStunAddr1);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
ASSERT_EQ(1U, port()->Candidates().size());
EXPECT_TRUE(kLocalAddr.EqualIPs(port()->Candidates()[0].address()));
std::string expected_server_url = "stun:127.0.0.1:5000";
EXPECT_EQ(port()->Candidates()[0].url(), expected_server_url);
// TODO(deadbeef): Add IPv6 tests here.
}
// Test that we fail properly if we can't get an address.
TEST_F(StunPortTest, TestPrepareAddressFail) {
CreateStunPort(kBadAddr);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_TRUE(error());
EXPECT_EQ(0U, port()->Candidates().size());
}
// Test that we can get an address from a STUN server specified by a hostname.
// Crashes on Linux, see webrtc:7416
#if defined(WEBRTC_LINUX) || defined(WEBRTC_WIN)
#define MAYBE_TestPrepareAddressHostname DISABLED_TestPrepareAddressHostname
#else
#define MAYBE_TestPrepareAddressHostname TestPrepareAddressHostname
#endif
TEST_F(StunPortTest, MAYBE_TestPrepareAddressHostname) {
CreateStunPort(kStunHostnameAddr);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
ASSERT_EQ(1U, port()->Candidates().size());
EXPECT_TRUE(kLocalAddr.EqualIPs(port()->Candidates()[0].address()));
EXPECT_EQ(kStunCandidatePriority, port()->Candidates()[0].priority());
}
// Test that we handle hostname lookup failures properly.
TEST_F(StunPortTestWithRealClock, TestPrepareAddressHostnameFail) {
CreateStunPort(kBadHostnameAddr);
PrepareAddress();
EXPECT_TRUE_WAIT(done(), kTimeoutMs);
EXPECT_TRUE(error());
EXPECT_EQ(0U, port()->Candidates().size());
}
// This test verifies keepalive response messages don't result in
// additional candidate generation.
TEST_F(StunPortTest, TestKeepAliveResponse) {
SetKeepaliveDelay(500); // 500ms of keepalive delay.
CreateStunPort(kStunAddr1);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
ASSERT_EQ(1U, port()->Candidates().size());
EXPECT_TRUE(kLocalAddr.EqualIPs(port()->Candidates()[0].address()));
SIMULATED_WAIT(false, 1000, fake_clock);
EXPECT_EQ(1U, port()->Candidates().size());
}
// Test that a local candidate can be generated using a shared socket.
TEST_F(StunPortTest, TestSharedSocketPrepareAddress) {
CreateSharedUdpPort(kStunAddr1, nullptr);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
ASSERT_EQ(1U, port()->Candidates().size());
EXPECT_TRUE(kLocalAddr.EqualIPs(port()->Candidates()[0].address()));
}
// Test that we still a get a local candidate with invalid stun server hostname.
// Also verifing that UDPPort can receive packets when stun address can't be
// resolved.
TEST_F(StunPortTestWithRealClock,
TestSharedSocketPrepareAddressInvalidHostname) {
CreateSharedUdpPort(kBadHostnameAddr, nullptr);
PrepareAddress();
EXPECT_TRUE_WAIT(done(), kTimeoutMs);
ASSERT_EQ(1U, port()->Candidates().size());
EXPECT_TRUE(kLocalAddr.EqualIPs(port()->Candidates()[0].address()));
// Send data to port after it's ready. This is to make sure, UDP port can
// handle data with unresolved stun server address.
std::string data = "some random data, sending to cricket::Port.";
SendData(data.c_str(), data.length());
// No crash is success.
}
// Test that the same address is added only once if two STUN servers are in use.
TEST_F(StunPortTest, TestNoDuplicatedAddressWithTwoStunServers) {
ServerAddresses stun_servers;
stun_servers.insert(kStunAddr1);
stun_servers.insert(kStunAddr2);
CreateStunPort(stun_servers);
EXPECT_EQ("stun", port()->Type());
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_EQ(1U, port()->Candidates().size());
EXPECT_EQ(port()->Candidates()[0].relay_protocol(), "");
}
// Test that candidates can be allocated for multiple STUN servers, one of which
// is not reachable.
TEST_F(StunPortTest, TestMultipleStunServersWithBadServer) {
ServerAddresses stun_servers;
stun_servers.insert(kStunAddr1);
stun_servers.insert(kBadAddr);
CreateStunPort(stun_servers);
EXPECT_EQ("stun", port()->Type());
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_EQ(1U, port()->Candidates().size());
}
// Test that two candidates are allocated if the two STUN servers return
// different mapped addresses.
TEST_F(StunPortTest, TestTwoCandidatesWithTwoStunServersAcrossNat) {
const SocketAddress kStunMappedAddr1("77.77.77.77", 0);
const SocketAddress kStunMappedAddr2("88.77.77.77", 0);
stun_server_1()->set_fake_stun_addr(kStunMappedAddr1);
stun_server_2()->set_fake_stun_addr(kStunMappedAddr2);
ServerAddresses stun_servers;
stun_servers.insert(kStunAddr1);
stun_servers.insert(kStunAddr2);
CreateStunPort(stun_servers);
EXPECT_EQ("stun", port()->Type());
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_EQ(2U, port()->Candidates().size());
EXPECT_EQ(port()->Candidates()[0].relay_protocol(), "");
EXPECT_EQ(port()->Candidates()[1].relay_protocol(), "");
}
// Test that the stun_keepalive_lifetime is set correctly based on the network
// type on a STUN port. Also test that it will be updated if the network type
// changes.
TEST_F(StunPortTest, TestStunPortGetStunKeepaliveLifetime) {
// Lifetime for the default (unknown) network type is |kInfiniteLifetime|.
CreateStunPort(kStunAddr1);
EXPECT_EQ(kInfiniteLifetime, port()->stun_keepalive_lifetime());
// Lifetime for the cellular network is |kHighCostPortKeepaliveLifetimeMs|
SetNetworkType(rtc::ADAPTER_TYPE_CELLULAR);
EXPECT_EQ(kHighCostPortKeepaliveLifetimeMs,
port()->stun_keepalive_lifetime());
// Lifetime for the wifi network is |kInfiniteLifetime|.
SetNetworkType(rtc::ADAPTER_TYPE_WIFI);
CreateStunPort(kStunAddr2);
EXPECT_EQ(kInfiniteLifetime, port()->stun_keepalive_lifetime());
}
// Test that the stun_keepalive_lifetime is set correctly based on the network
// type on a shared STUN port (UDPPort). Also test that it will be updated
// if the network type changes.
TEST_F(StunPortTest, TestUdpPortGetStunKeepaliveLifetime) {
// Lifetime for the default (unknown) network type is |kInfiniteLifetime|.
CreateSharedUdpPort(kStunAddr1, nullptr);
EXPECT_EQ(kInfiniteLifetime, port()->stun_keepalive_lifetime());
// Lifetime for the cellular network is |kHighCostPortKeepaliveLifetimeMs|.
SetNetworkType(rtc::ADAPTER_TYPE_CELLULAR);
EXPECT_EQ(kHighCostPortKeepaliveLifetimeMs,
port()->stun_keepalive_lifetime());
// Lifetime for the wifi network type is |kInfiniteLifetime|.
SetNetworkType(rtc::ADAPTER_TYPE_WIFI);
CreateSharedUdpPort(kStunAddr2, nullptr);
EXPECT_EQ(kInfiniteLifetime, port()->stun_keepalive_lifetime());
}
// Test that STUN binding requests will be stopped shortly if the keep-alive
// lifetime is short.
TEST_F(StunPortTest, TestStunBindingRequestShortLifetime) {
SetKeepaliveDelay(101);
SetKeepaliveLifetime(100);
CreateStunPort(kStunAddr1);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_TRUE_SIMULATED_WAIT(
!port()->HasPendingRequest(cricket::STUN_BINDING_REQUEST), 2000,
fake_clock);
}
// Test that by default, the STUN binding requests will last for a long time.
TEST_F(StunPortTest, TestStunBindingRequestLongLifetime) {
SetKeepaliveDelay(101);
CreateStunPort(kStunAddr1);
PrepareAddress();
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
EXPECT_TRUE_SIMULATED_WAIT(
port()->HasPendingRequest(cricket::STUN_BINDING_REQUEST), 1000,
fake_clock);
}
class MockAsyncPacketSocket : public rtc::AsyncPacketSocket {
public:
~MockAsyncPacketSocket() = default;
MOCK_CONST_METHOD0(GetLocalAddress, SocketAddress());
MOCK_CONST_METHOD0(GetRemoteAddress, SocketAddress());
MOCK_METHOD3(Send,
int(const void* pv,
size_t cb,
const rtc::PacketOptions& options));
MOCK_METHOD4(SendTo,
int(const void* pv,
size_t cb,
const SocketAddress& addr,
const rtc::PacketOptions& options));
MOCK_METHOD0(Close, int());
MOCK_CONST_METHOD0(GetState, State());
MOCK_METHOD2(GetOption, int(rtc::Socket::Option opt, int* value));
MOCK_METHOD2(SetOption, int(rtc::Socket::Option opt, int value));
MOCK_CONST_METHOD0(GetError, int());
MOCK_METHOD1(SetError, void(int error));
};
// Test that outbound packets inherit the dscp value assigned to the socket.
TEST_F(StunPortTest, TestStunPacketsHaveDscpPacketOption) {
MockAsyncPacketSocket* socket = new MockAsyncPacketSocket();
CreateSharedUdpPort(kStunAddr1, socket);
EXPECT_CALL(*socket, GetLocalAddress()).WillRepeatedly(Return(kLocalAddr));
EXPECT_CALL(*socket, GetState())
.WillRepeatedly(Return(rtc::AsyncPacketSocket::STATE_BOUND));
EXPECT_CALL(*socket, SetOption(_, _)).WillRepeatedly(Return(0));
// If DSCP is not set on the socket, stun packets should have no value.
EXPECT_CALL(*socket,
SendTo(_, _, _,
::testing::Field(&rtc::PacketOptions::dscp,
::testing::Eq(rtc::DSCP_NO_CHANGE))))
.WillOnce(Return(100));
PrepareAddress();
// Once it is set transport wide, they should inherit that value.
port()->SetOption(rtc::Socket::OPT_DSCP, rtc::DSCP_AF41);
EXPECT_CALL(*socket, SendTo(_, _, _,
::testing::Field(&rtc::PacketOptions::dscp,
::testing::Eq(rtc::DSCP_AF41))))
.WillRepeatedly(Return(100));
EXPECT_TRUE_SIMULATED_WAIT(done(), kTimeoutMs, fake_clock);
}