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/*
* Copyright 2016 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 "p2p/base/port_allocator.h"
#include <memory>
#include "absl/strings/string_view.h"
#include "p2p/base/fake_port_allocator.h"
#include "rtc_base/thread.h"
#include "rtc_base/virtual_socket_server.h"
#include "test/gtest.h"
#include "test/scoped_key_value_config.h"
static const char kContentName[] = "test content";
// Based on ICE_UFRAG_LENGTH
static const char kIceUfrag[] = "UF00";
// Based on ICE_PWD_LENGTH
static const char kIcePwd[] = "TESTICEPWD00000000000000";
static const char kTurnUsername[] = "test";
static const char kTurnPassword[] = "test";
constexpr uint64_t kTiebreakerDefault = 44444;
class PortAllocatorTest : public ::testing::Test, public sigslot::has_slots<> {
public:
PortAllocatorTest()
: vss_(std::make_unique<rtc::VirtualSocketServer>()),
main_(vss_.get()),
packet_socket_factory_(
std::make_unique<rtc::BasicPacketSocketFactory>(vss_.get())),
allocator_(std::make_unique<cricket::FakePortAllocator>(
rtc::Thread::Current(),
packet_socket_factory_.get(),
&field_trials_)) {
allocator_->SetIceTiebreaker(kTiebreakerDefault);
}
protected:
void SetConfigurationWithPoolSize(int candidate_pool_size) {
EXPECT_TRUE(allocator_->SetConfiguration(
cricket::ServerAddresses(), std::vector<cricket::RelayServerConfig>(),
candidate_pool_size, webrtc::NO_PRUNE));
}
void SetConfigurationWithPoolSizeExpectFailure(int candidate_pool_size) {
EXPECT_FALSE(allocator_->SetConfiguration(
cricket::ServerAddresses(), std::vector<cricket::RelayServerConfig>(),
candidate_pool_size, webrtc::NO_PRUNE));
}
std::unique_ptr<cricket::FakePortAllocatorSession> CreateSession(
absl::string_view content_name,
int component,
absl::string_view ice_ufrag,
absl::string_view ice_pwd) {
return std::unique_ptr<cricket::FakePortAllocatorSession>(
static_cast<cricket::FakePortAllocatorSession*>(
allocator_
->CreateSession(content_name, component, ice_ufrag, ice_pwd)
.release()));
}
const cricket::FakePortAllocatorSession* GetPooledSession() const {
return static_cast<const cricket::FakePortAllocatorSession*>(
allocator_->GetPooledSession());
}
std::unique_ptr<cricket::FakePortAllocatorSession> TakePooledSession() {
return std::unique_ptr<cricket::FakePortAllocatorSession>(
static_cast<cricket::FakePortAllocatorSession*>(
allocator_->TakePooledSession(kContentName, 0, kIceUfrag, kIcePwd)
.release()));
}
int GetAllPooledSessionsReturnCount() {
int count = 0;
while (TakePooledSession() != nullptr) {
++count;
}
return count;
}
webrtc::test::ScopedKeyValueConfig field_trials_;
std::unique_ptr<rtc::VirtualSocketServer> vss_;
rtc::AutoSocketServerThread main_;
std::unique_ptr<rtc::PacketSocketFactory> packet_socket_factory_;
std::unique_ptr<cricket::FakePortAllocator> allocator_;
rtc::SocketAddress stun_server_1{"11.11.11.11", 3478};
rtc::SocketAddress stun_server_2{"22.22.22.22", 3478};
cricket::RelayServerConfig turn_server_1{"11.11.11.11", 3478,
kTurnUsername, kTurnPassword,
cricket::PROTO_UDP, false};
cricket::RelayServerConfig turn_server_2{"22.22.22.22", 3478,
kTurnUsername, kTurnPassword,
cricket::PROTO_UDP, false};
};
TEST_F(PortAllocatorTest, TestDefaults) {
EXPECT_EQ(0UL, allocator_->stun_servers().size());
EXPECT_EQ(0UL, allocator_->turn_servers().size());
EXPECT_EQ(0, allocator_->candidate_pool_size());
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
}
// Call CreateSession and verify that the parameters passed in and the
// candidate filter are applied as expected.
TEST_F(PortAllocatorTest, CreateSession) {
allocator_->SetCandidateFilter(cricket::CF_RELAY);
auto session = CreateSession(kContentName, 1, kIceUfrag, kIcePwd);
ASSERT_NE(nullptr, session);
EXPECT_EQ(cricket::CF_RELAY, session->candidate_filter());
EXPECT_EQ(kContentName, session->content_name());
EXPECT_EQ(1, session->component());
EXPECT_EQ(kIceUfrag, session->ice_ufrag());
EXPECT_EQ(kIcePwd, session->ice_pwd());
}
TEST_F(PortAllocatorTest, SetConfigurationUpdatesIceServers) {
cricket::ServerAddresses stun_servers_1 = {stun_server_1};
std::vector<cricket::RelayServerConfig> turn_servers_1 = {turn_server_1};
EXPECT_TRUE(allocator_->SetConfiguration(stun_servers_1, turn_servers_1, 0,
webrtc::NO_PRUNE));
EXPECT_EQ(stun_servers_1, allocator_->stun_servers());
EXPECT_EQ(turn_servers_1, allocator_->turn_servers());
// Update with a different set of servers.
cricket::ServerAddresses stun_servers_2 = {stun_server_2};
std::vector<cricket::RelayServerConfig> turn_servers_2 = {turn_server_2};
EXPECT_TRUE(allocator_->SetConfiguration(stun_servers_2, turn_servers_2, 0,
webrtc::NO_PRUNE));
EXPECT_EQ(stun_servers_2, allocator_->stun_servers());
EXPECT_EQ(turn_servers_2, allocator_->turn_servers());
}
TEST_F(PortAllocatorTest, SetConfigurationUpdatesCandidatePoolSize) {
SetConfigurationWithPoolSize(2);
EXPECT_EQ(2, allocator_->candidate_pool_size());
SetConfigurationWithPoolSize(3);
EXPECT_EQ(3, allocator_->candidate_pool_size());
SetConfigurationWithPoolSize(1);
EXPECT_EQ(1, allocator_->candidate_pool_size());
SetConfigurationWithPoolSize(4);
EXPECT_EQ(4, allocator_->candidate_pool_size());
}
// A negative pool size should just be treated as zero.
TEST_F(PortAllocatorTest, SetConfigurationWithNegativePoolSizeFails) {
SetConfigurationWithPoolSizeExpectFailure(-1);
}
// Test that if the candidate pool size is nonzero, pooled sessions are
// created, and StartGettingPorts is called on them.
TEST_F(PortAllocatorTest, SetConfigurationCreatesPooledSessions) {
SetConfigurationWithPoolSize(2);
auto session_1 = TakePooledSession();
auto session_2 = TakePooledSession();
ASSERT_NE(nullptr, session_1.get());
ASSERT_NE(nullptr, session_2.get());
EXPECT_EQ(1, session_1->port_config_count());
EXPECT_EQ(1, session_2->port_config_count());
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
}
// Test that if the candidate pool size is increased, pooled sessions are
// created as necessary.
TEST_F(PortAllocatorTest, SetConfigurationCreatesMorePooledSessions) {
SetConfigurationWithPoolSize(1);
SetConfigurationWithPoolSize(2);
EXPECT_EQ(2, GetAllPooledSessionsReturnCount());
}
// Test that if the candidate pool size is reduced, extra sessions are
// destroyed.
TEST_F(PortAllocatorTest, SetConfigurationDestroysPooledSessions) {
SetConfigurationWithPoolSize(2);
SetConfigurationWithPoolSize(1);
EXPECT_EQ(1, GetAllPooledSessionsReturnCount());
}
// According to JSEP, existing pooled sessions should be destroyed and new
// ones created when the ICE servers change.
TEST_F(PortAllocatorTest,
SetConfigurationRecreatesPooledSessionsWhenIceServersChange) {
cricket::ServerAddresses stun_servers_1 = {stun_server_1};
std::vector<cricket::RelayServerConfig> turn_servers_1 = {turn_server_1};
allocator_->SetConfiguration(stun_servers_1, turn_servers_1, 1,
webrtc::NO_PRUNE);
EXPECT_EQ(stun_servers_1, allocator_->stun_servers());
EXPECT_EQ(turn_servers_1, allocator_->turn_servers());
// Update with a different set of servers (and also change pool size).
cricket::ServerAddresses stun_servers_2 = {stun_server_2};
std::vector<cricket::RelayServerConfig> turn_servers_2 = {turn_server_2};
allocator_->SetConfiguration(stun_servers_2, turn_servers_2, 2,
webrtc::NO_PRUNE);
EXPECT_EQ(stun_servers_2, allocator_->stun_servers());
EXPECT_EQ(turn_servers_2, allocator_->turn_servers());
auto session_1 = TakePooledSession();
auto session_2 = TakePooledSession();
ASSERT_NE(nullptr, session_1.get());
ASSERT_NE(nullptr, session_2.get());
EXPECT_EQ(stun_servers_2, session_1->stun_servers());
EXPECT_EQ(turn_servers_2, session_1->turn_servers());
EXPECT_EQ(stun_servers_2, session_2->stun_servers());
EXPECT_EQ(turn_servers_2, session_2->turn_servers());
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
}
// According to JSEP, after SetLocalDescription, setting different ICE servers
// will not cause the pool to be refilled. This is implemented by the
// PeerConnection calling FreezeCandidatePool when a local description is set.
TEST_F(PortAllocatorTest,
SetConfigurationDoesNotRecreatePooledSessionsAfterFreezeCandidatePool) {
cricket::ServerAddresses stun_servers_1 = {stun_server_1};
std::vector<cricket::RelayServerConfig> turn_servers_1 = {turn_server_1};
allocator_->SetConfiguration(stun_servers_1, turn_servers_1, 1,
webrtc::NO_PRUNE);
EXPECT_EQ(stun_servers_1, allocator_->stun_servers());
EXPECT_EQ(turn_servers_1, allocator_->turn_servers());
// Update with a different set of servers, but first freeze the pool.
allocator_->FreezeCandidatePool();
cricket::ServerAddresses stun_servers_2 = {stun_server_2};
std::vector<cricket::RelayServerConfig> turn_servers_2 = {turn_server_2};
allocator_->SetConfiguration(stun_servers_2, turn_servers_2, 2,
webrtc::NO_PRUNE);
EXPECT_EQ(stun_servers_2, allocator_->stun_servers());
EXPECT_EQ(turn_servers_2, allocator_->turn_servers());
auto session = TakePooledSession();
ASSERT_NE(nullptr, session.get());
EXPECT_EQ(stun_servers_1, session->stun_servers());
EXPECT_EQ(turn_servers_1, session->turn_servers());
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
}
TEST_F(PortAllocatorTest, GetPooledSessionReturnsNextSession) {
SetConfigurationWithPoolSize(2);
auto peeked_session_1 = GetPooledSession();
auto session_1 = TakePooledSession();
EXPECT_EQ(session_1.get(), peeked_session_1);
auto peeked_session_2 = GetPooledSession();
auto session_2 = TakePooledSession();
EXPECT_EQ(session_2.get(), peeked_session_2);
}
// Verify that subclasses of PortAllocatorSession are given a chance to update
// ICE parameters when TakePooledSession is called, and the base class updates
// the info itself.
TEST_F(PortAllocatorTest, TakePooledSessionUpdatesIceParameters) {
SetConfigurationWithPoolSize(1);
auto peeked_session = GetPooledSession();
ASSERT_NE(nullptr, peeked_session);
EXPECT_EQ(0, peeked_session->transport_info_update_count());
std::unique_ptr<cricket::FakePortAllocatorSession> session(
static_cast<cricket::FakePortAllocatorSession*>(
allocator_->TakePooledSession(kContentName, 1, kIceUfrag, kIcePwd)
.release()));
EXPECT_EQ(1, session->transport_info_update_count());
EXPECT_EQ(kContentName, session->content_name());
EXPECT_EQ(1, session->component());
EXPECT_EQ(kIceUfrag, session->ice_ufrag());
EXPECT_EQ(kIcePwd, session->ice_pwd());
}
// According to JSEP, candidate filtering should be done when the pooled
// candidates are surfaced to the application. This means when a pooled
// session is taken. So a pooled session should gather candidates
// unfiltered until it's returned by TakePooledSession.
TEST_F(PortAllocatorTest, TakePooledSessionUpdatesCandidateFilter) {
allocator_->SetCandidateFilter(cricket::CF_RELAY);
SetConfigurationWithPoolSize(1);
auto peeked_session = GetPooledSession();
ASSERT_NE(nullptr, peeked_session);
EXPECT_EQ(cricket::CF_ALL, peeked_session->candidate_filter());
auto session = TakePooledSession();
EXPECT_EQ(cricket::CF_RELAY, session->candidate_filter());
}
// Verify that after DiscardCandidatePool, TakePooledSession doesn't return
// anything.
TEST_F(PortAllocatorTest, DiscardCandidatePool) {
SetConfigurationWithPoolSize(1);
allocator_->DiscardCandidatePool();
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
}
TEST_F(PortAllocatorTest, RestrictIceCredentialsChange) {
SetConfigurationWithPoolSize(1);
EXPECT_EQ(1, GetAllPooledSessionsReturnCount());
allocator_->DiscardCandidatePool();
// Only return pooled sessions with the ice credentials that
// match those requested in TakePooledSession().
allocator_->set_restrict_ice_credentials_change(true);
SetConfigurationWithPoolSize(1);
EXPECT_EQ(0, GetAllPooledSessionsReturnCount());
allocator_->DiscardCandidatePool();
SetConfigurationWithPoolSize(1);
auto credentials = allocator_->GetPooledIceCredentials();
ASSERT_EQ(1u, credentials.size());
EXPECT_EQ(nullptr,
allocator_->TakePooledSession(kContentName, 0, kIceUfrag, kIcePwd));
EXPECT_NE(nullptr,
allocator_->TakePooledSession(kContentName, 0, credentials[0].ufrag,
credentials[0].pwd));
EXPECT_EQ(nullptr,
allocator_->TakePooledSession(kContentName, 0, credentials[0].ufrag,
credentials[0].pwd));
allocator_->DiscardCandidatePool();
}
// Constants for testing candidates
const char kIpv4Address[] = "12.34.56.78";
const char kIpv4AddressWithPort[] = "12.34.56.78:443";
TEST_F(PortAllocatorTest, SanitizeEmptyCandidateDefaultConfig) {
cricket::Candidate input;
cricket::Candidate output = allocator_->SanitizeCandidate(input);
EXPECT_EQ("", output.address().ipaddr().ToString());
}
TEST_F(PortAllocatorTest, SanitizeIpv4CandidateDefaultConfig) {
cricket::Candidate input(1, "udp", rtc::SocketAddress(kIpv4Address, 443), 1,
"username", "password", cricket::LOCAL_PORT_TYPE, 1,
"foundation", 1, 1);
cricket::Candidate output = allocator_->SanitizeCandidate(input);
EXPECT_EQ(kIpv4AddressWithPort, output.address().ToString());
EXPECT_EQ(kIpv4Address, output.address().ipaddr().ToString());
}
TEST_F(PortAllocatorTest, SanitizeIpv4CandidateMdnsObfuscationEnabled) {
allocator_->SetMdnsObfuscationEnabledForTesting(true);
cricket::Candidate input(1, "udp", rtc::SocketAddress(kIpv4Address, 443), 1,
"username", "password", cricket::LOCAL_PORT_TYPE, 1,
"foundation", 1, 1);
cricket::Candidate output = allocator_->SanitizeCandidate(input);
EXPECT_NE(kIpv4AddressWithPort, output.address().ToString());
EXPECT_EQ("", output.address().ipaddr().ToString());
}
TEST_F(PortAllocatorTest, SanitizePrflxCandidateMdnsObfuscationEnabled) {
allocator_->SetMdnsObfuscationEnabledForTesting(true);
// Create the candidate from an IP literal. This populates the hostname.
cricket::Candidate input(1, "udp", rtc::SocketAddress(kIpv4Address, 443), 1,
"username", "password", cricket::PRFLX_PORT_TYPE, 1,
"foundation", 1, 1);
cricket::Candidate output = allocator_->SanitizeCandidate(input);
EXPECT_NE(kIpv4AddressWithPort, output.address().ToString());
EXPECT_EQ("", output.address().ipaddr().ToString());
}
TEST_F(PortAllocatorTest, SanitizeIpv4NonLiteralMdnsObfuscationEnabled) {
// Create the candidate with an empty hostname.
allocator_->SetMdnsObfuscationEnabledForTesting(true);
rtc::IPAddress ip;
EXPECT_TRUE(IPFromString(kIpv4Address, &ip));
cricket::Candidate input(1, "udp", rtc::SocketAddress(ip, 443), 1, "username",
"password", cricket::LOCAL_PORT_TYPE, 1,
"foundation", 1, 1);
cricket::Candidate output = allocator_->SanitizeCandidate(input);
EXPECT_NE(kIpv4AddressWithPort, output.address().ToString());
EXPECT_EQ("", output.address().ipaddr().ToString());
}