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// Copyright 2019 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 "discovery/dnssd/impl/dns_data.h"
#include <chrono>
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace openscreen {
namespace discovery {
class DnsDataTesting : public DnsData {
public:
explicit DnsDataTesting(const InstanceKey& instance_key)
: DnsData(instance_key) {}
void set_srv(absl::optional<SrvRecordRdata> new_srv) {
SetVariable(new_srv, srv(), DnsType::kSRV);
}
void set_txt(absl::optional<TxtRecordRdata> new_txt) {
SetVariable(new_txt, txt(), DnsType::kTXT);
}
void set_a(absl::optional<ARecordRdata> new_a) {
SetVariable(new_a, a(), DnsType::kA);
}
void set_aaaa(absl::optional<AAAARecordRdata> new_aaaa) {
SetVariable(new_aaaa, aaaa(), DnsType::kAAAA);
}
const absl::optional<SrvRecordRdata>& srv() { return srv_; }
const absl::optional<TxtRecordRdata>& txt() { return txt_; }
const absl::optional<ARecordRdata>& a() { return a_; }
const absl::optional<AAAARecordRdata>& aaaa() { return aaaa_; }
private:
template <typename T>
void SetVariable(absl::optional<T> new_val,
const absl::optional<T>& old_val,
DnsType type) {
if (!new_val.has_value() && !old_val.has_value()) {
return;
}
if (!new_val.has_value()) {
MdnsRecord record(DomainName{"0"}, type, DnsClass::kIN,
RecordType::kUnique, std::chrono::seconds(1),
old_val.value());
ApplyDataRecordChange(record, RecordChangedEvent::kDeleted);
return;
}
MdnsRecord record(DomainName{"0"}, type, DnsClass::kIN, RecordType::kUnique,
std::chrono::seconds(1), new_val.value());
if (!old_val.has_value()) {
ApplyDataRecordChange(record, RecordChangedEvent::kCreated);
} else {
ApplyDataRecordChange(record, RecordChangedEvent::kUpdated);
}
}
};
static const IPAddress v4_address =
IPAddress(std::array<uint8_t, 4>{{192, 168, 0, 0}});
static const IPAddress v6_address = IPAddress(std::array<uint8_t, 16>{
{1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}});
static const std::string instance_name = "instance";
static const std::string service_name = "_srv-name._udp";
static const std::string domain_name = "local";
static const InstanceKey key = {instance_name, service_name, domain_name};
static constexpr uint16_t port_num = uint16_t{80};
DnsDataTesting CreateFullyPopulatedData() {
InstanceKey instance{instance_name, service_name, domain_name};
DnsDataTesting data(instance);
DomainName target{instance_name, "_srv-name", "_udp", domain_name};
SrvRecordRdata srv(0, 0, port_num, target);
TxtRecordRdata txt{"name=value", "boolValue"};
ARecordRdata a(v4_address);
AAAARecordRdata aaaa(v6_address);
data.set_srv(srv);
data.set_txt(txt);
data.set_a(a);
data.set_aaaa(aaaa);
return data;
}
MdnsRecord CreateFullyPopulatedRecord(uint16_t port = port_num) {
DomainName target{instance_name, "_srv-name", "_udp", domain_name};
auto type = DnsType::kSRV;
auto clazz = DnsClass::kIN;
auto record_type = RecordType::kShared;
auto ttl = std::chrono::seconds(0);
SrvRecordRdata srv(0, 0, port, target);
return MdnsRecord(target, type, clazz, record_type, ttl, srv);
}
// DnsData Conversions.
TEST(DnsSdDnsDataTests, TestConvertDnsDataCorrectly) {
DnsDataTesting data = CreateFullyPopulatedData();
ErrorOr<DnsSdInstanceRecord> result = data.CreateRecord();
ASSERT_TRUE(result.is_value());
DnsSdInstanceRecord record = result.value();
ASSERT_TRUE(record.address_v4().has_value());
ASSERT_TRUE(record.address_v6().has_value());
EXPECT_EQ(record.instance_id(), instance_name);
EXPECT_EQ(record.service_id(), service_name);
EXPECT_EQ(record.domain_id(), domain_name);
EXPECT_EQ(record.address_v4().value().port, port_num);
EXPECT_EQ(record.address_v4().value().address, v4_address);
EXPECT_EQ(record.address_v6().value().port, port_num);
EXPECT_EQ(record.address_v6().value().address, v6_address);
EXPECT_FALSE(record.txt().IsEmpty());
}
TEST(DnsSdDnsDataTests, TestConvertDnsDataMissingData) {
DnsDataTesting data = CreateFullyPopulatedData();
EXPECT_TRUE(data.CreateRecord().is_value());
data = CreateFullyPopulatedData();
data.set_srv(absl::nullopt);
EXPECT_FALSE(data.CreateRecord().is_value());
data = CreateFullyPopulatedData();
data.set_txt(absl::nullopt);
EXPECT_FALSE(data.CreateRecord().is_value());
data = CreateFullyPopulatedData();
data.set_a(absl::nullopt);
EXPECT_TRUE(data.CreateRecord().is_value());
data = CreateFullyPopulatedData();
data.set_aaaa(absl::nullopt);
EXPECT_TRUE(data.CreateRecord().is_value());
data = CreateFullyPopulatedData();
data.set_a(absl::nullopt);
data.set_aaaa(absl::nullopt);
EXPECT_FALSE(data.CreateRecord().is_value());
}
TEST(DnsSdDnsDataTests, TestConvertDnsDataOneAddress) {
// Address v4.
DnsDataTesting data = CreateFullyPopulatedData();
data.set_aaaa(absl::nullopt);
ErrorOr<DnsSdInstanceRecord> result = data.CreateRecord();
ASSERT_TRUE(result.is_value());
DnsSdInstanceRecord record = result.value();
EXPECT_FALSE(record.address_v6().has_value());
ASSERT_TRUE(record.address_v4().has_value());
EXPECT_EQ(record.address_v4().value().port, port_num);
EXPECT_EQ(record.address_v4().value().address, v4_address);
// Address v6.
data = CreateFullyPopulatedData();
data.set_a(absl::nullopt);
result = data.CreateRecord();
ASSERT_TRUE(result.is_value());
record = result.value();
EXPECT_FALSE(record.address_v4().has_value());
ASSERT_TRUE(record.address_v6().has_value());
EXPECT_EQ(record.address_v6().value().port, port_num);
EXPECT_EQ(record.address_v6().value().address, v6_address);
}
TEST(DnsSdDnsDataTests, TestConvertDnsDataBadTxt) {
DnsDataTesting data = CreateFullyPopulatedData();
data.set_txt(TxtRecordRdata{"=bad_text"});
ErrorOr<DnsSdInstanceRecord> result = data.CreateRecord();
EXPECT_TRUE(result.is_error());
}
// ApplyDataRecordChange tests.
TEST(DnsSdDnsDataTests, TestApplyRecordChanges) {
MdnsRecord record = CreateFullyPopulatedRecord(port_num);
InstanceKey instance{instance_name, service_name, domain_name};
DnsDataTesting data(instance);
EXPECT_TRUE(
data.ApplyDataRecordChange(record, RecordChangedEvent::kCreated).ok());
ASSERT_TRUE(data.srv().has_value());
EXPECT_EQ(data.srv().value().port(), port_num);
record = CreateFullyPopulatedRecord(234);
EXPECT_FALSE(
data.ApplyDataRecordChange(record, RecordChangedEvent::kCreated).ok());
ASSERT_TRUE(data.srv().has_value());
EXPECT_EQ(data.srv().value().port(), port_num);
record = CreateFullyPopulatedRecord(345);
EXPECT_TRUE(
data.ApplyDataRecordChange(record, RecordChangedEvent::kUpdated).ok());
ASSERT_TRUE(data.srv().has_value());
EXPECT_EQ(data.srv().value().port(), 345);
record = CreateFullyPopulatedRecord();
EXPECT_TRUE(
data.ApplyDataRecordChange(record, RecordChangedEvent::kDeleted).ok());
ASSERT_FALSE(data.srv().has_value());
record = CreateFullyPopulatedRecord(1234);
EXPECT_FALSE(
data.ApplyDataRecordChange(record, RecordChangedEvent::kUpdated).ok());
ASSERT_FALSE(data.srv().has_value());
}
} // namespace discovery
} // namespace openscreen
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