| /* |
| * Copyright (C) 2019 The Android Open Source Project |
| * |
| * 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. |
| */ |
| |
| #include <array> |
| |
| #include <android-base/test_utils.h> |
| #include <gmock/gmock.h> |
| #include <gtest/gtest.h> |
| |
| #include "DnsStats.h" |
| #include "tests/resolv_test_base.h" |
| |
| namespace android::net { |
| |
| using namespace std::chrono_literals; |
| using android::netdutils::IPSockAddr; |
| using std::chrono::microseconds; |
| using std::chrono::milliseconds; |
| using ::testing::IsEmpty; |
| using ::testing::UnorderedElementsAreArray; |
| |
| namespace { |
| |
| constexpr auto NO_AVERAGE_LATENCY = std::nullopt; |
| |
| // A helper which can propagate the failure to outside of the stmt to know which line |
| // of stmt fails. The expectation fails only for the first failed stmt. |
| #define EXPECT_NO_FAILURE(stmt) \ |
| do { \ |
| bool alreadyFailed = HasFailure(); \ |
| stmt; \ |
| if (!alreadyFailed && HasFailure()) EXPECT_FALSE(HasFailure()); \ |
| } while (0) |
| |
| DnsQueryEvent makeDnsQueryEvent(const Protocol protocol, const NsRcode rcode, |
| const milliseconds& latency) { |
| DnsQueryEvent event; |
| event.set_protocol(protocol); |
| event.set_rcode(rcode); |
| event.set_latency_micros(latency.count() * 1000); |
| return event; |
| } |
| |
| StatsData makeStatsData(const IPSockAddr& server, const int total, const microseconds& latencyUs, |
| const std::map<int, int>& rcodeCounts) { |
| StatsData ret(server); |
| ret.total = total; |
| ret.latencyUs = latencyUs; |
| ret.rcodeCounts = rcodeCounts; |
| return ret; |
| } |
| |
| } // namespace |
| |
| // TODO: add StatsDataTest to ensure its methods return correct outputs. |
| |
| class StatsRecordsTest : public ResolvTestBase {}; |
| |
| TEST_F(StatsRecordsTest, PushRecord) { |
| const IPSockAddr server = IPSockAddr::toIPSockAddr("127.0.0.2", 53); |
| constexpr size_t size = 3; |
| const StatsRecords::Record recordNoError = { |
| .rcode = NS_R_NO_ERROR, |
| .linux_errno = 0, |
| .latencyUs{10ms}, |
| }; |
| const StatsRecords::Record recordTimeout = { |
| .rcode = NS_R_TIMEOUT, |
| .linux_errno = 0, |
| .latencyUs{250ms}, |
| }; |
| |
| StatsRecords sr(server, size); |
| EXPECT_EQ(sr.getStatsData(), makeStatsData(server, 0, 0ms, {})); |
| |
| sr.push(recordNoError); |
| EXPECT_EQ(sr.getStatsData(), makeStatsData(server, 1, 10ms, {{NS_R_NO_ERROR, 1}})); |
| |
| sr.push(recordNoError); |
| EXPECT_EQ(sr.getStatsData(), makeStatsData(server, 2, 20ms, {{NS_R_NO_ERROR, 2}})); |
| |
| sr.push(recordTimeout); |
| EXPECT_EQ(sr.getStatsData(), |
| makeStatsData(server, 3, 270ms, {{NS_R_NO_ERROR, 2}, {NS_R_TIMEOUT, 1}})); |
| |
| sr.push(recordTimeout); |
| EXPECT_EQ(sr.getStatsData(), |
| makeStatsData(server, 3, 510ms, {{NS_R_NO_ERROR, 1}, {NS_R_TIMEOUT, 2}})); |
| |
| sr.push(recordTimeout); |
| EXPECT_EQ(sr.getStatsData(), |
| makeStatsData(server, 3, 750ms, {{NS_R_NO_ERROR, 0}, {NS_R_TIMEOUT, 3}})); |
| } |
| |
| class DnsStatsTest : public ResolvTestBase { |
| protected: |
| std::string captureDumpOutput() { |
| netdutils::DumpWriter dw(STDOUT_FILENO); |
| CapturedStdout captured; |
| mDnsStats.dump(dw); |
| return captured.str(); |
| } |
| |
| // Get the output string from dump() and check the content. |
| void verifyDumpOutput(const std::vector<StatsData>& tcpData, |
| const std::vector<StatsData>& udpData, |
| const std::vector<StatsData>& dotData, |
| const std::vector<StatsData>& mdnsData, |
| const std::vector<StatsData>& dohData) { |
| // A pattern to capture three matches: |
| // server address (empty allowed), the statistics, and the score. |
| const std::regex pattern(R"(\s{4,}([0-9a-fA-F:\.\]\[]*)[ ]?([<(].*[>)])[ ]?(\S*))"); |
| std::string dumpString = captureDumpOutput(); |
| |
| const auto check = [&](const std::vector<StatsData>& statsData, const std::string& protocol, |
| std::string* dumpString) { |
| SCOPED_TRACE(protocol); |
| ASSERT_NE(dumpString->find(protocol), std::string::npos); |
| std::smatch sm; |
| |
| // Expect to show something even if none of servers or mdns multicast addresses is set. |
| if (statsData.empty()) { |
| ASSERT_TRUE(std::regex_search(*dumpString, sm, pattern)); |
| EXPECT_TRUE(sm[1].str().empty()); |
| EXPECT_EQ(sm[2], "<no data>"); |
| EXPECT_TRUE(sm[3].str().empty()); |
| *dumpString = sm.suffix(); |
| return; |
| } |
| |
| for (const auto& stats : statsData) { |
| ASSERT_TRUE(std::regex_search(*dumpString, sm, pattern)); |
| EXPECT_EQ(sm[1], stats.sockAddr.toString()); |
| EXPECT_FALSE(sm[2].str().empty()); |
| EXPECT_FALSE(sm[3].str().empty()); |
| *dumpString = sm.suffix(); |
| } |
| }; |
| |
| check(udpData, "UDP", &dumpString); |
| check(dohData, "DOH", &dumpString); |
| check(dotData, "TLS", &dumpString); |
| check(tcpData, "TCP", &dumpString); |
| check(mdnsData, "MDNS", &dumpString); |
| |
| // Ensure the whole string has been checked. |
| EXPECT_EQ(dumpString, "\n"); |
| } |
| |
| void verifyDnsStatsContent(Protocol protocol, const std::vector<StatsData>& expectedStats, |
| const std::optional<microseconds>& expectedAvgLatency) { |
| if (expectedStats.empty()) { |
| EXPECT_THAT(mDnsStats.getStats(protocol), IsEmpty()); |
| } else { |
| EXPECT_THAT(mDnsStats.getStats(protocol), UnorderedElementsAreArray(expectedStats)); |
| } |
| |
| EXPECT_EQ(mDnsStats.getAverageLatencyUs(protocol), expectedAvgLatency); |
| } |
| |
| DnsStats mDnsStats; |
| }; |
| |
| TEST_F(DnsStatsTest, SetAddrs) { |
| // Check before any operation to mDnsStats. |
| verifyDumpOutput({}, {}, {}, {}, {}); |
| |
| static const struct { |
| std::vector<std::string> servers; |
| std::vector<std::string> expectation; |
| bool isSuccess; |
| } tests[] = { |
| // Normal case. |
| { |
| {"127.0.0.1", "127.0.0.2", "fe80::1%22", "2001:db8::2", "::1"}, |
| {"127.0.0.1", "127.0.0.2", "fe80::1%22", "2001:db8::2", "::1"}, |
| true, |
| }, |
| // Duplicate servers. |
| { |
| {"127.0.0.1", "2001:db8::2", "127.0.0.1", "2001:db8::2"}, |
| {"127.0.0.1", "2001:db8::2"}, |
| true, |
| }, |
| // Invalid server addresses. The state remains in previous state. |
| { |
| {"not_an_ip", "127.0.0.3", "127.a.b.2"}, |
| {"127.0.0.1", "2001:db8::2"}, |
| false, |
| }, |
| // Clean up the old servers 127.0.0.1 and 127.0.0.2. |
| { |
| {"127.0.0.4", "2001:db8::5"}, |
| {"127.0.0.4", "2001:db8::5"}, |
| true, |
| }, |
| // Empty list. |
| {{}, {}, true}, |
| }; |
| |
| for (const auto& [servers, expectation, isSuccess] : tests) { |
| std::vector<IPSockAddr> ipSockAddrs; |
| ipSockAddrs.reserve(servers.size()); |
| for (const auto& server : servers) { |
| ipSockAddrs.push_back(IPSockAddr::toIPSockAddr(server, 53)); |
| } |
| |
| EXPECT_TRUE(mDnsStats.setAddrs(ipSockAddrs, PROTO_TCP) == isSuccess); |
| EXPECT_TRUE(mDnsStats.setAddrs(ipSockAddrs, PROTO_UDP) == isSuccess); |
| EXPECT_TRUE(mDnsStats.setAddrs(ipSockAddrs, PROTO_DOT) == isSuccess); |
| |
| std::vector<StatsData> expectedStats; |
| expectedStats.reserve(expectation.size()); |
| for (const auto& exp : expectation) { |
| expectedStats.push_back(makeStatsData(IPSockAddr::toIPSockAddr(exp, 53), 0, 0ms, {})); |
| } |
| |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, expectedStats, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, expectedStats, NO_AVERAGE_LATENCY)); |
| } |
| |
| verifyDumpOutput({}, {}, {}, {}, {}); |
| } |
| |
| TEST_F(DnsStatsTest, SetServersDifferentPorts) { |
| const std::vector<IPSockAddr> servers = { |
| IPSockAddr::toIPSockAddr("127.0.0.1", 0), IPSockAddr::toIPSockAddr("fe80::1", 0), |
| IPSockAddr::toIPSockAddr("127.0.0.1", 53), IPSockAddr::toIPSockAddr("127.0.0.1", 853), |
| IPSockAddr::toIPSockAddr("127.0.0.1", 5353), IPSockAddr::toIPSockAddr("fe80::1", 53), |
| IPSockAddr::toIPSockAddr("fe80::1", 853), IPSockAddr::toIPSockAddr("fe80::1", 5353), |
| }; |
| |
| // Servers setup fails due to port unset. |
| EXPECT_FALSE(mDnsStats.setAddrs(servers, PROTO_TCP)); |
| EXPECT_FALSE(mDnsStats.setAddrs(servers, PROTO_UDP)); |
| EXPECT_FALSE(mDnsStats.setAddrs(servers, PROTO_DOT)); |
| |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, {}, NO_AVERAGE_LATENCY)); |
| verifyDumpOutput({}, {}, {}, {}, {}); |
| |
| EXPECT_TRUE(mDnsStats.setAddrs(std::vector(servers.begin() + 2, servers.end()), PROTO_TCP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(std::vector(servers.begin() + 2, servers.end()), PROTO_UDP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(std::vector(servers.begin() + 2, servers.end()), PROTO_DOT)); |
| |
| const std::vector<StatsData> expectedStats = { |
| makeStatsData(servers[2], 0, 0ms, {}), makeStatsData(servers[3], 0, 0ms, {}), |
| makeStatsData(servers[4], 0, 0ms, {}), makeStatsData(servers[5], 0, 0ms, {}), |
| makeStatsData(servers[6], 0, 0ms, {}), makeStatsData(servers[7], 0, 0ms, {}), |
| }; |
| |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, expectedStats, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, expectedStats, NO_AVERAGE_LATENCY)); |
| verifyDumpOutput(expectedStats, expectedStats, expectedStats, {}, {}); |
| } |
| |
| TEST_F(DnsStatsTest, AddStatsAndClear) { |
| const std::vector<IPSockAddr> servers = { |
| IPSockAddr::toIPSockAddr("127.0.0.1", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.2", 53), |
| }; |
| const std::vector<IPSockAddr> mdnsaddrs = { |
| IPSockAddr::toIPSockAddr("ff02::fb", 5353), |
| IPSockAddr::toIPSockAddr("224.0.0.251", 5353), |
| }; |
| const DnsQueryEvent record = makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 10ms); |
| const DnsQueryEvent mdnsrecord = makeDnsQueryEvent(PROTO_MDNS, NS_R_NO_ERROR, 10ms); |
| |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_TCP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_UDP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(mdnsaddrs, PROTO_MDNS)); |
| |
| // Fail to add stats because of incorrect arguments. |
| EXPECT_FALSE(mDnsStats.addStats(IPSockAddr::toIPSockAddr("127.0.0.4", 53), record)); |
| EXPECT_FALSE(mDnsStats.addStats(IPSockAddr::toIPSockAddr("127.a.b.4", 53), record)); |
| |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], record)); |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], record)); |
| EXPECT_TRUE(mDnsStats.addStats(servers[1], record)); |
| EXPECT_TRUE(mDnsStats.addStats(mdnsaddrs[0], mdnsrecord)); |
| EXPECT_TRUE(mDnsStats.addStats(mdnsaddrs[1], mdnsrecord)); |
| |
| const std::vector<StatsData> expectedStatsForTcp = { |
| makeStatsData(servers[0], 0, 0ms, {}), |
| makeStatsData(servers[1], 0, 0ms, {}), |
| }; |
| const std::vector<StatsData> expectedStatsForUdp = { |
| makeStatsData(servers[0], 2, 20ms, {{NS_R_NO_ERROR, 2}}), |
| makeStatsData(servers[1], 1, 10ms, {{NS_R_NO_ERROR, 1}}), |
| }; |
| |
| const std::vector<StatsData> expectedStatsForMdns = { |
| makeStatsData(mdnsaddrs[1], 1, 10ms, {{NS_R_NO_ERROR, 1}}), |
| makeStatsData(mdnsaddrs[0], 1, 10ms, {{NS_R_NO_ERROR, 1}}), |
| }; |
| |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, expectedStatsForTcp, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStatsForUdp, 10ms)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_MDNS, expectedStatsForMdns, 10ms)); |
| verifyDumpOutput(expectedStatsForTcp, expectedStatsForUdp, {}, expectedStatsForMdns, {}); |
| |
| // Clear stats. |
| EXPECT_TRUE(mDnsStats.setAddrs({}, PROTO_TCP)); |
| EXPECT_TRUE(mDnsStats.setAddrs({}, PROTO_UDP)); |
| EXPECT_TRUE(mDnsStats.setAddrs({}, PROTO_DOT)); |
| EXPECT_TRUE(mDnsStats.setAddrs({}, PROTO_MDNS)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, {}, NO_AVERAGE_LATENCY)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_MDNS, {}, NO_AVERAGE_LATENCY)); |
| verifyDumpOutput({}, {}, {}, {}, {}); |
| } |
| |
| TEST_F(DnsStatsTest, StatsRemainsInExistentServer) { |
| std::vector<IPSockAddr> servers = { |
| IPSockAddr::toIPSockAddr("127.0.0.1", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.2", 53), |
| }; |
| const DnsQueryEvent recordNoError = makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 10ms); |
| const DnsQueryEvent recordTimeout = makeDnsQueryEvent(PROTO_UDP, NS_R_TIMEOUT, 250ms); |
| |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_UDP)); |
| |
| // Add a record to 127.0.0.1. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], recordNoError)); |
| |
| // Add four records to 127.0.0.2. |
| EXPECT_TRUE(mDnsStats.addStats(servers[1], recordNoError)); |
| EXPECT_TRUE(mDnsStats.addStats(servers[1], recordNoError)); |
| EXPECT_TRUE(mDnsStats.addStats(servers[1], recordTimeout)); |
| EXPECT_TRUE(mDnsStats.addStats(servers[1], recordTimeout)); |
| |
| std::vector<StatsData> expectedStats = { |
| makeStatsData(servers[0], 1, 10ms, {{NS_R_NO_ERROR, 1}}), |
| makeStatsData(servers[1], 4, 520ms, {{NS_R_NO_ERROR, 2}, {NS_R_TIMEOUT, 2}}), |
| }; |
| EXPECT_THAT(mDnsStats.getStats(PROTO_UDP), UnorderedElementsAreArray(expectedStats)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, 106ms)); |
| verifyDumpOutput({}, expectedStats, {}, {}, {}); |
| |
| // Update the server list, the stats of 127.0.0.2 will remain. |
| servers = { |
| IPSockAddr::toIPSockAddr("127.0.0.2", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.3", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.4", 53), |
| }; |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_UDP)); |
| expectedStats = { |
| makeStatsData(servers[0], 4, 520ms, {{NS_R_NO_ERROR, 2}, {NS_R_TIMEOUT, 2}}), |
| makeStatsData(servers[1], 0, 0ms, {}), |
| makeStatsData(servers[2], 0, 0ms, {}), |
| }; |
| EXPECT_THAT(mDnsStats.getStats(PROTO_UDP), UnorderedElementsAreArray(expectedStats)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, 130ms)); |
| verifyDumpOutput({}, expectedStats, {}, {}, {}); |
| |
| // Let's add a record to 127.0.0.2 again. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], recordNoError)); |
| expectedStats = { |
| makeStatsData(servers[0], 5, 530ms, {{NS_R_NO_ERROR, 3}, {NS_R_TIMEOUT, 2}}), |
| makeStatsData(servers[1], 0, 0ms, {}), |
| makeStatsData(servers[2], 0, 0ms, {}), |
| }; |
| EXPECT_THAT(mDnsStats.getStats(PROTO_UDP), UnorderedElementsAreArray(expectedStats)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, 106ms)); |
| verifyDumpOutput({}, expectedStats, {}, {}, {}); |
| } |
| |
| TEST_F(DnsStatsTest, AddStatsRecords_100000) { |
| constexpr size_t operations = 100000; |
| constexpr size_t logSize = DnsStats::kLogSize; |
| constexpr size_t rcodeNum = 4; // A value by which kLogSize is divisible. |
| ASSERT_EQ(logSize % rcodeNum, 0U); |
| |
| const std::vector<IPSockAddr> servers = { |
| IPSockAddr::toIPSockAddr("127.0.0.1", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.2", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.3", 53), |
| IPSockAddr::toIPSockAddr("127.0.0.4", 53), |
| }; |
| |
| const std::vector<IPSockAddr> mdnsaddrs = { |
| IPSockAddr::toIPSockAddr("ff02::fb", 5353), |
| IPSockAddr::toIPSockAddr("224.0.0.251", 5353), |
| }; |
| |
| // To test unknown rcode in rcodeToName(), store the elements as type int. |
| const std::array<int, rcodeNum> rcodes = { |
| NS_R_NO_ERROR, // NOERROR |
| NS_R_NXDOMAIN, // NXDOMAIN |
| 99, // UNKNOWN(99) |
| NS_R_INTERNAL_ERROR, // INTERNAL_ERROR |
| }; |
| |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_TCP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_UDP)); |
| EXPECT_TRUE(mDnsStats.setAddrs(servers, PROTO_DOT)); |
| EXPECT_TRUE(mDnsStats.setAddrs(mdnsaddrs, PROTO_MDNS)); |
| |
| for (size_t i = 0; i < operations; i++) { |
| const NsRcode rcode = static_cast<NsRcode>(rcodes[i % rcodeNum]); |
| const auto eventTcp = makeDnsQueryEvent(PROTO_TCP, rcode, milliseconds(i)); |
| const auto eventUdp = makeDnsQueryEvent(PROTO_UDP, rcode, milliseconds(i)); |
| const auto eventDot = makeDnsQueryEvent(PROTO_DOT, rcode, milliseconds(i)); |
| for (const auto& server : servers) { |
| SCOPED_TRACE(server.toString() + "-" + std::to_string(i)); |
| ASSERT_TRUE(mDnsStats.addStats(server, eventTcp)); |
| ASSERT_TRUE(mDnsStats.addStats(server, eventUdp)); |
| ASSERT_TRUE(mDnsStats.addStats(server, eventDot)); |
| } |
| const auto eventMdns = makeDnsQueryEvent(PROTO_MDNS, rcode, milliseconds(i)); |
| for (const auto& mdnsaddr : mdnsaddrs) { |
| SCOPED_TRACE(mdnsaddr.toString() + "-" + std::to_string(i)); |
| ASSERT_TRUE(mDnsStats.addStats(mdnsaddr, eventMdns)); |
| } |
| } |
| |
| std::map<int, int> expectedRcodeCounts; |
| for (const auto& rcode : rcodes) { |
| expectedRcodeCounts.try_emplace(rcode, 32); |
| } |
| |
| // The average latency 99935.5 ms is derived from (99872ms + 99873ms + ... + 99999ms) / logSize, |
| // where logSize is 128. |
| const std::vector<StatsData> expectedStats = { |
| makeStatsData(servers[0], logSize, logSize * 99935500us, expectedRcodeCounts), |
| makeStatsData(servers[1], logSize, logSize * 99935500us, expectedRcodeCounts), |
| makeStatsData(servers[2], logSize, logSize * 99935500us, expectedRcodeCounts), |
| makeStatsData(servers[3], logSize, logSize * 99935500us, expectedRcodeCounts), |
| }; |
| |
| const std::vector<StatsData> expectedMdnsStats = { |
| makeStatsData(mdnsaddrs[1], logSize, logSize * 99935500us, expectedRcodeCounts), |
| makeStatsData(mdnsaddrs[0], logSize, logSize * 99935500us, expectedRcodeCounts), |
| }; |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_TCP, expectedStats, 99935500us)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_UDP, expectedStats, 99935500us)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_DOT, expectedStats, 99935500us)); |
| EXPECT_NO_FAILURE(verifyDnsStatsContent(PROTO_MDNS, expectedMdnsStats, 99935500us)); |
| verifyDumpOutput(expectedStats, expectedStats, expectedStats, expectedMdnsStats, {}); |
| } |
| |
| TEST_F(DnsStatsTest, GetServers_SortingByLatency) { |
| const IPSockAddr server1 = IPSockAddr::toIPSockAddr("127.0.0.1", 53); |
| const IPSockAddr server2 = IPSockAddr::toIPSockAddr("127.0.0.2", 53); |
| const IPSockAddr server3 = IPSockAddr::toIPSockAddr("2001:db8:cafe:d00d::1", 53); |
| const IPSockAddr server4 = IPSockAddr::toIPSockAddr("2001:db8:cafe:d00d::2", 53); |
| |
| // Return empty list before setup. |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), IsEmpty()); |
| |
| // Before there's any stats, the list of the sorted servers is the same as the setup's one. |
| EXPECT_TRUE(mDnsStats.setAddrs({server1, server2, server3, server4}, PROTO_UDP)); |
| EXPECT_TRUE(mDnsStats.setAddrs({server1, server2, server3, server4}, PROTO_DOT)); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server1, server2, server3, server4})); |
| |
| // Add a record to server1. The qualities of the other servers increase. |
| EXPECT_TRUE(mDnsStats.addStats(server1, makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 10ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server3, server4, server1})); |
| |
| // Add a record, with less repose time than server1, to server3. |
| EXPECT_TRUE(mDnsStats.addStats(server3, makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 5ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server4, server3, server1})); |
| |
| // Even though server2 has zero response time, select server4 as the first server because it |
| // doesn't have stats yet. |
| EXPECT_TRUE(mDnsStats.addStats(server2, makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 0ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server4, server2, server3, server1})); |
| |
| // Updating DoT record to server4 changes nothing. |
| EXPECT_TRUE(mDnsStats.addStats(server4, makeDnsQueryEvent(PROTO_DOT, NS_R_NO_ERROR, 10ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server4, server2, server3, server1})); |
| |
| // Add a record, with a very large value of respose time, to server4. |
| EXPECT_TRUE(mDnsStats.addStats(server4, makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 500000ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server3, server1, server4})); |
| |
| // Add some internal_error records with permission error to server2. |
| // The internal_error won't cause the priority of server2 drop. (but some of the other |
| // quality factors will still be counted, such as skipped_count and latency) |
| auto recordFromNetworkRestricted = makeDnsQueryEvent(PROTO_UDP, NS_R_INTERNAL_ERROR, 1ms); |
| recordFromNetworkRestricted.set_linux_errno(static_cast<LinuxErrno>(EPERM)); |
| for (int i = 0; i < 3; i++) { |
| EXPECT_TRUE(mDnsStats.addStats(server2, recordFromNetworkRestricted)); |
| } |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server3, server1, server4})); |
| |
| // The list of the DNS servers changed. |
| EXPECT_TRUE(mDnsStats.setAddrs({server2, server4}, PROTO_UDP)); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server4})); |
| |
| // It fails to add records to an non-existing server, and nothing is changed in getting |
| // the sorted servers. |
| EXPECT_FALSE(mDnsStats.addStats(server1, makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 10ms))); |
| EXPECT_THAT(mDnsStats.getSortedServers(PROTO_UDP), |
| testing::ElementsAreArray({server2, server4})); |
| } |
| |
| TEST_F(DnsStatsTest, GetServers_DeprioritizingBadServers) { |
| const IPSockAddr server1 = IPSockAddr::toIPSockAddr("127.0.0.1", 53); |
| const IPSockAddr server2 = IPSockAddr::toIPSockAddr("127.0.0.2", 53); |
| const IPSockAddr server3 = IPSockAddr::toIPSockAddr("127.0.0.3", 53); |
| const IPSockAddr server4 = IPSockAddr::toIPSockAddr("127.0.0.4", 53); |
| |
| EXPECT_TRUE(mDnsStats.setAddrs({server1, server2, server3, server4}, PROTO_UDP)); |
| |
| int server1Counts = 0; |
| int server2Counts = 0; |
| for (int i = 0; i < 5000; i++) { |
| const auto servers = mDnsStats.getSortedServers(PROTO_UDP); |
| EXPECT_EQ(servers.size(), 4U); |
| if (servers[0] == server1) { |
| // server1 is relatively slowly responsive. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], |
| makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 200ms))); |
| server1Counts++; |
| } else if (servers[0] == server2) { |
| // server2 is relatively quickly responsive. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], |
| makeDnsQueryEvent(PROTO_UDP, NS_R_NO_ERROR, 100ms))); |
| server2Counts++; |
| } else if (servers[0] == server3) { |
| // server3 always times out. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], |
| makeDnsQueryEvent(PROTO_UDP, NS_R_TIMEOUT, 1000ms))); |
| } else if (servers[0] == server4) { |
| // server4 is unusable. |
| EXPECT_TRUE(mDnsStats.addStats(servers[0], |
| makeDnsQueryEvent(PROTO_UDP, NS_R_INTERNAL_ERROR, 1ms))); |
| } |
| } |
| |
| const std::vector<StatsData> allStatsData = mDnsStats.getStats(PROTO_UDP); |
| for (const auto& data : allStatsData) { |
| EXPECT_EQ(data.rcodeCounts.size(), 1U); |
| if (data.sockAddr == server1 || data.sockAddr == server2) { |
| const auto it = data.rcodeCounts.find(NS_R_NO_ERROR); |
| ASSERT_NE(it, data.rcodeCounts.end()); |
| EXPECT_GT(server2Counts, 2 * server1Counts); // At least twice larger. |
| } else if (data.sockAddr == server3) { |
| const auto it = data.rcodeCounts.find(NS_R_TIMEOUT); |
| ASSERT_NE(it, data.rcodeCounts.end()); |
| EXPECT_LT(it->second, 10); |
| } else if (data.sockAddr == server4) { |
| const auto it = data.rcodeCounts.find(NS_R_INTERNAL_ERROR); |
| ASSERT_NE(it, data.rcodeCounts.end()); |
| EXPECT_LT(it->second, 10); |
| } |
| } |
| } |
| |
| } // namespace android::net |
