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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <stdint.h>
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/run_loop.h"
#include "base/task/single_thread_task_runner.h"
#include "base/test/task_environment.h"
#include "chrome/browser/local_discovery/service_discovery_client_impl.h"
#include "net/base/net_errors.h"
#include "net/dns/mdns_client_impl.h"
#include "net/dns/mock_mdns_socket_factory.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::_;
namespace local_discovery {
namespace {
const uint8_t kSamplePacketA[] = {
// Header
0x00, 0x00, // ID is zeroed out
0x81, 0x80, // Standard query response, RA, no error
0x00, 0x00, // No questions (for simplicity)
0x00, 0x01, // 1 RR (answers)
0x00, 0x00, // 0 authority RRs
0x00, 0x00, // 0 additional RRs
0x07, 'm', 'y', 'h', 'e', 'l', 'l', 'o',
0x05, 'l', 'o', 'c', 'a', 'l',
0x00,
0x00, 0x01, // TYPE is A.
0x00, 0x01, // CLASS is IN.
0x00, 0x00, // TTL (4 bytes) is 16 seconds.
0x00, 0x10,
0x00, 0x04, // RDLENGTH is 4 bytes.
0x01, 0x02,
0x03, 0x04,
};
const uint8_t kSamplePacketAAAA[] = {
// Header
0x00, 0x00, // ID is zeroed out
0x81, 0x80, // Standard query response, RA, no error
0x00, 0x00, // No questions (for simplicity)
0x00, 0x01, // 1 RR (answers)
0x00, 0x00, // 0 authority RRs
0x00, 0x00, // 0 additional RRs
0x07, 'm', 'y', 'h', 'e', 'l', 'l', 'o',
0x05, 'l', 'o', 'c', 'a', 'l',
0x00,
0x00, 0x1C, // TYPE is AAAA.
0x00, 0x01, // CLASS is IN.
0x00, 0x00, // TTL (4 bytes) is 16 seconds.
0x00, 0x10,
0x00, 0x10, // RDLENGTH is 4 bytes.
0x00, 0x0A, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00,
0x00, 0x01, 0x00, 0x02,
0x00, 0x03, 0x00, 0x04,
};
class LocalDomainResolverTest : public testing::Test {
public:
void SetUp() override {
EXPECT_EQ(net::OK, mdns_client_.StartListening(&socket_factory_));
}
std::string IPAddressToStringWithInvalid(const net::IPAddress& address) {
if (!address.IsValid())
return "";
return address.ToString();
}
void AddressCallback(bool resolved,
const net::IPAddress& address_ipv4,
const net::IPAddress& address_ipv6) {
AddressCallbackInternal(resolved,
IPAddressToStringWithInvalid(address_ipv4),
IPAddressToStringWithInvalid(address_ipv6));
}
void RunFor(base::TimeDelta time_period) {
base::RunLoop run_loop;
base::CancelableOnceClosure callback(run_loop.QuitWhenIdleClosure());
base::SingleThreadTaskRunner::GetCurrentDefault()->PostDelayedTask(
FROM_HERE, callback.callback(), time_period);
run_loop.Run();
callback.Cancel();
}
MOCK_METHOD3(AddressCallbackInternal,
void(bool resolved,
std::string address_ipv4,
std::string address_ipv6));
net::MockMDnsSocketFactory socket_factory_;
net::MDnsClientImpl mdns_client_;
base::test::SingleThreadTaskEnvironment task_environment_;
};
TEST_F(LocalDomainResolverTest, ResolveDomainA) {
LocalDomainResolverImpl resolver(
"myhello.local", net::ADDRESS_FAMILY_IPV4,
base::BindOnce(&LocalDomainResolverTest::AddressCallback,
base::Unretained(this)),
&mdns_client_);
EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(2); // Twice per query
resolver.Start();
EXPECT_CALL(*this, AddressCallbackInternal(true, "1.2.3.4", ""));
socket_factory_.SimulateReceive(kSamplePacketA, sizeof(kSamplePacketA));
}
TEST_F(LocalDomainResolverTest, ResolveDomainAAAA) {
LocalDomainResolverImpl resolver(
"myhello.local", net::ADDRESS_FAMILY_IPV6,
base::BindOnce(&LocalDomainResolverTest::AddressCallback,
base::Unretained(this)),
&mdns_client_);
EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(2); // Twice per query
resolver.Start();
EXPECT_CALL(*this, AddressCallbackInternal(true, "", "a::1:2:3:4"));
socket_factory_.SimulateReceive(kSamplePacketAAAA, sizeof(kSamplePacketAAAA));
}
TEST_F(LocalDomainResolverTest, ResolveDomainAnyOneAvailable) {
LocalDomainResolverImpl resolver(
"myhello.local", net::ADDRESS_FAMILY_UNSPECIFIED,
base::BindOnce(&LocalDomainResolverTest::AddressCallback,
base::Unretained(this)),
&mdns_client_);
EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(4); // Twice per query
resolver.Start();
socket_factory_.SimulateReceive(kSamplePacketAAAA, sizeof(kSamplePacketAAAA));
EXPECT_CALL(*this, AddressCallbackInternal(true, "", "a::1:2:3:4"));
RunFor(base::Milliseconds(150));
}
TEST_F(LocalDomainResolverTest, ResolveDomainAnyBothAvailable) {
LocalDomainResolverImpl resolver(
"myhello.local", net::ADDRESS_FAMILY_UNSPECIFIED,
base::BindOnce(&LocalDomainResolverTest::AddressCallback,
base::Unretained(this)),
&mdns_client_);
EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(4); // Twice per query
resolver.Start();
EXPECT_CALL(*this, AddressCallbackInternal(true, "1.2.3.4", "a::1:2:3:4"));
socket_factory_.SimulateReceive(kSamplePacketAAAA, sizeof(kSamplePacketAAAA));
socket_factory_.SimulateReceive(kSamplePacketA, sizeof(kSamplePacketA));
}
TEST_F(LocalDomainResolverTest, ResolveDomainNone) {
LocalDomainResolverImpl resolver(
"myhello.local", net::ADDRESS_FAMILY_UNSPECIFIED,
base::BindOnce(&LocalDomainResolverTest::AddressCallback,
base::Unretained(this)),
&mdns_client_);
EXPECT_CALL(socket_factory_, OnSendTo(_)).Times(4); // Twice per query
resolver.Start();
EXPECT_CALL(*this, AddressCallbackInternal(false, "", ""));
RunFor(base::Seconds(4));
}
} // namespace
} // namespace local_discovery
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