Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2016 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
Lorenzo Colitti | 0a8b4aa | 2019-06-26 22:31:03 +0900 | [diff] [blame] | 10 | * Unless required by applicable law or agreed to in writing, software |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | * |
| 16 | */ |
| 17 | |
Bernie Innocenti | 3952ccc | 2019-03-03 19:39:53 +0900 | [diff] [blame] | 18 | #define LOG_TAG "resolv_integration_test" |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 19 | |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 20 | #include <android-base/logging.h> |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 21 | #include <android-base/parseint.h> |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 22 | #include <android-base/properties.h> |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 23 | #include <android-base/stringprintf.h> |
| 24 | #include <android-base/unique_fd.h> |
| 25 | #include <android/multinetwork.h> // ResNsendFlags |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 26 | #include <arpa/inet.h> |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 27 | #include <arpa/nameser.h> |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 28 | #include <binder/ProcessState.h> |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 29 | #include <bpf/BpfUtils.h> |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 30 | #include <cutils/sockets.h> |
| 31 | #include <gmock/gmock-matchers.h> |
| 32 | #include <gtest/gtest.h> |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 33 | #include <netdb.h> |
Luke Huang | 9d2d25b | 2019-06-14 00:34:05 +0800 | [diff] [blame] | 34 | #include <netdutils/InternetAddresses.h> |
Luke Huang | 579ddc7 | 2019-06-14 00:59:39 +0800 | [diff] [blame] | 35 | #include <netdutils/NetworkConstants.h> // SHA256_SIZE |
Luke Huang | 9d2d25b | 2019-06-14 00:34:05 +0800 | [diff] [blame] | 36 | #include <netdutils/ResponseCode.h> |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 37 | #include <netdutils/Slice.h> |
Luke Huang | 9d2d25b | 2019-06-14 00:34:05 +0800 | [diff] [blame] | 38 | #include <netdutils/SocketOption.h> |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 39 | #include <netdutils/Stopwatch.h> |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 40 | #include <netinet/in.h> |
| 41 | #include <poll.h> /* poll */ |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 42 | #include <private/android_filesystem_config.h> |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 43 | #include <resolv.h> |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 44 | #include <stdarg.h> |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 45 | #include <stdlib.h> |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 46 | #include <sys/socket.h> |
| 47 | #include <sys/un.h> |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 48 | #include <unistd.h> |
| 49 | |
| 50 | #include <algorithm> |
| 51 | #include <chrono> |
| 52 | #include <iterator> |
| 53 | #include <numeric> |
| 54 | #include <thread> |
| 55 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 56 | #include <aidl/android/net/IDnsResolver.h> |
| 57 | #include <android/binder_manager.h> |
| 58 | #include <android/binder_process.h> |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 59 | #include "NetdClient.h" |
Bernie Innocenti | 41b82c4 | 2019-06-05 22:38:25 +0900 | [diff] [blame] | 60 | #include "ResolverStats.h" |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 61 | #include "netid_client.h" // NETID_UNSET |
| 62 | #include "params.h" // MAXNS |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 63 | #include "test_utils.h" |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 64 | #include "tests/dns_metrics_listener/dns_metrics_listener.h" |
chenbruce | b43ec75 | 2019-07-24 20:19:41 +0800 | [diff] [blame] | 65 | #include "tests/dns_responder/dns_responder.h" |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 66 | #include "tests/dns_responder/dns_responder_client_ndk.h" |
Hungming Chen | c655662 | 2019-10-02 16:01:07 +0800 | [diff] [blame] | 67 | #include "tests/dns_responder/dns_tls_certificate.h" |
chenbruce | b43ec75 | 2019-07-24 20:19:41 +0800 | [diff] [blame] | 68 | #include "tests/dns_responder/dns_tls_frontend.h" |
Luke Huang | fde8248 | 2019-06-04 01:04:53 +0800 | [diff] [blame] | 69 | #include "tests/resolv_test_utils.h" |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 70 | |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 71 | // Valid VPN netId range is 100 ~ 65535 |
| 72 | constexpr int TEST_VPN_NETID = 65502; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 73 | constexpr int MAXPACKET = (8 * 1024); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 74 | |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 75 | // Use maximum reserved appId for applications to avoid conflict with existing uids. |
| 76 | static const int TEST_UID = 99999; |
| 77 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 78 | // Semi-public Bionic hook used by the NDK (frameworks/base/native/android/net.c) |
| 79 | // Tested here for convenience. |
| 80 | extern "C" int android_getaddrinfofornet(const char* hostname, const char* servname, |
| 81 | const addrinfo* hints, unsigned netid, unsigned mark, |
| 82 | struct addrinfo** result); |
| 83 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 84 | using namespace std::chrono_literals; |
| 85 | |
Luke Huang | 7007085 | 2019-11-25 18:25:50 +0800 | [diff] [blame] | 86 | using aidl::android::net::IDnsResolver; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 87 | using aidl::android::net::INetd; |
Mike Yu | 8ac6340 | 2019-12-02 15:28:38 +0800 | [diff] [blame] | 88 | using aidl::android::net::ResolverParamsParcel; |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 89 | using android::base::ParseInt; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 90 | using android::base::StringPrintf; |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 91 | using android::base::unique_fd; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 92 | using android::net::ResolverStats; |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 93 | using android::net::metrics::DnsMetricsListener; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 94 | using android::netdutils::enableSockopt; |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 95 | using android::netdutils::makeSlice; |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 96 | using android::netdutils::ResponseCode; |
Luke Huang | 9d2d25b | 2019-06-14 00:34:05 +0800 | [diff] [blame] | 97 | using android::netdutils::ScopedAddrinfo; |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 98 | using android::netdutils::Stopwatch; |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 99 | using android::netdutils::toHex; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 100 | |
| 101 | // TODO: move into libnetdutils? |
| 102 | namespace { |
Luke Huang | fde8248 | 2019-06-04 01:04:53 +0800 | [diff] [blame] | 103 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 104 | ScopedAddrinfo safe_getaddrinfo(const char* node, const char* service, |
| 105 | const struct addrinfo* hints) { |
| 106 | addrinfo* result = nullptr; |
| 107 | if (getaddrinfo(node, service, hints, &result) != 0) { |
| 108 | result = nullptr; // Should already be the case, but... |
| 109 | } |
| 110 | return ScopedAddrinfo(result); |
| 111 | } |
Luke Huang | fde8248 | 2019-06-04 01:04:53 +0800 | [diff] [blame] | 112 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 113 | std::pair<ScopedAddrinfo, int> safe_getaddrinfo_time_taken(const char* node, const char* service, |
| 114 | const addrinfo& hints) { |
| 115 | Stopwatch s; |
| 116 | ScopedAddrinfo result = safe_getaddrinfo(node, service, &hints); |
| 117 | return {std::move(result), s.timeTakenUs() / 1000}; |
| 118 | } |
| 119 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 120 | struct NameserverStats { |
| 121 | NameserverStats() = delete; |
| 122 | NameserverStats(const std::string server) : server(server) {} |
| 123 | NameserverStats& setSuccesses(int val) { |
| 124 | successes = val; |
| 125 | return *this; |
| 126 | } |
| 127 | NameserverStats& setErrors(int val) { |
| 128 | errors = val; |
| 129 | return *this; |
| 130 | } |
| 131 | NameserverStats& setTimeouts(int val) { |
| 132 | timeouts = val; |
| 133 | return *this; |
| 134 | } |
| 135 | NameserverStats& setInternalErrors(int val) { |
| 136 | internal_errors = val; |
| 137 | return *this; |
| 138 | } |
| 139 | |
| 140 | const std::string server; |
| 141 | int successes = 0; |
| 142 | int errors = 0; |
| 143 | int timeouts = 0; |
| 144 | int internal_errors = 0; |
| 145 | }; |
| 146 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 147 | } // namespace |
| 148 | |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 149 | class ResolverTest : public ::testing::Test { |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 150 | public: |
Automerger Merge Worker | 19a291b | 2020-03-17 02:41:30 +0000 | [diff] [blame] | 151 | static void SetUpTestSuite() { |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 152 | // Get binder service. |
| 153 | // Note that |mDnsClient| is not used for getting binder service in this static function. |
| 154 | // The reason is that wants to keep |mDnsClient| as a non-static data member. |mDnsClient| |
| 155 | // which sets up device network configuration could be independent from every test. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 156 | // TODO: Perhaps add a static function in resolv_test_binder_utils.{cpp,h} to get binder |
| 157 | // service. |
| 158 | |
| 159 | AIBinder* binder = AServiceManager_getService("dnsresolver"); |
| 160 | ndk::SpAIBinder resolvBinder = ndk::SpAIBinder(binder); |
| 161 | auto resolvService = aidl::android::net::IDnsResolver::fromBinder(resolvBinder); |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 162 | ASSERT_NE(nullptr, resolvService.get()); |
| 163 | |
| 164 | // Subscribe the death recipient to the service IDnsResolver for detecting Netd death. |
Luke Huang | 7007085 | 2019-11-25 18:25:50 +0800 | [diff] [blame] | 165 | // GTEST assertion macros are not invoked for generating a test failure in the death |
| 166 | // recipient because the macros can't indicate failed test if Netd died between tests. |
| 167 | // Moreover, continuing testing may have no meaningful after Netd death. Therefore, the |
| 168 | // death recipient aborts process by GTEST_LOG_(FATAL) once Netd died. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 169 | sResolvDeathRecipient = AIBinder_DeathRecipient_new([](void*) { |
| 170 | constexpr char errorMessage[] = "Netd died"; |
| 171 | LOG(ERROR) << errorMessage; |
| 172 | GTEST_LOG_(FATAL) << errorMessage; |
| 173 | }); |
| 174 | ASSERT_EQ(STATUS_OK, AIBinder_linkToDeath(binder, sResolvDeathRecipient, nullptr)); |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 175 | |
| 176 | // Subscribe the DNS listener for verifying DNS metrics event contents. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 177 | sDnsMetricsListener = ndk::SharedRefBase::make<DnsMetricsListener>( |
| 178 | TEST_NETID /*monitor specific network*/); |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 179 | ASSERT_TRUE(resolvService->registerEventListener(sDnsMetricsListener).isOk()); |
| 180 | |
| 181 | // Start the binder thread pool for listening DNS metrics events and receiving death |
| 182 | // recipient. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 183 | ABinderProcess_startThreadPool(); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 184 | } |
Automerger Merge Worker | 19a291b | 2020-03-17 02:41:30 +0000 | [diff] [blame] | 185 | static void TearDownTestSuite() { AIBinder_DeathRecipient_delete(sResolvDeathRecipient); } |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 186 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 187 | protected: |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 188 | void SetUp() { mDnsClient.SetUp(); } |
Mike Yu | 960243d | 2020-01-17 19:02:15 +0800 | [diff] [blame] | 189 | void TearDown() { |
| 190 | // Ensure the dump works at the end of each test. |
| 191 | DumpResolverService(); |
| 192 | |
| 193 | mDnsClient.TearDown(); |
| 194 | } |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 195 | |
Luke Huang | 68fa500 | 2020-04-23 15:48:47 +0000 | [diff] [blame] | 196 | void resetNetwork() { |
| 197 | mDnsClient.TearDown(); |
| 198 | mDnsClient.SetupOemNetwork(); |
| 199 | } |
| 200 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 201 | void StartDns(test::DNSResponder& dns, const std::vector<DnsRecord>& records) { |
| 202 | for (const auto& r : records) { |
| 203 | dns.addMapping(r.host_name, r.type, r.addr); |
| 204 | } |
| 205 | |
| 206 | ASSERT_TRUE(dns.startServer()); |
| 207 | dns.clearQueries(); |
| 208 | } |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 209 | |
Mike Yu | 960243d | 2020-01-17 19:02:15 +0800 | [diff] [blame] | 210 | void DumpResolverService() { |
| 211 | unique_fd fd(open("/dev/null", O_WRONLY)); |
| 212 | EXPECT_EQ(mDnsClient.resolvService()->dump(fd, nullptr, 0), 0); |
| 213 | |
| 214 | const char* querylogCmd[] = {"querylog"}; // Keep it sync with DnsQueryLog::DUMP_KEYWORD. |
| 215 | EXPECT_EQ(mDnsClient.resolvService()->dump(fd, querylogCmd, std::size(querylogCmd)), 0); |
| 216 | } |
| 217 | |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 218 | bool WaitForNat64Prefix(ExpectNat64PrefixStatus status, |
| 219 | std::chrono::milliseconds timeout = std::chrono::milliseconds(1000)) { |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 220 | return sDnsMetricsListener->waitForNat64Prefix(status, timeout); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 221 | } |
| 222 | |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 223 | bool WaitForPrivateDnsValidation(std::string serverAddr, bool validated) { |
| 224 | return sDnsMetricsListener->waitForPrivateDnsValidation(serverAddr, validated); |
| 225 | } |
| 226 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 227 | bool hasUncaughtPrivateDnsValidation(const std::string& serverAddr) { |
| 228 | return sDnsMetricsListener->findValidationRecord(serverAddr); |
| 229 | } |
| 230 | |
| 231 | bool expectStatsFromGetResolverInfo(const std::vector<NameserverStats>& nameserversStats) { |
| 232 | std::vector<std::string> res_servers; |
| 233 | std::vector<std::string> res_domains; |
| 234 | std::vector<std::string> res_tls_servers; |
| 235 | res_params res_params; |
| 236 | std::vector<ResolverStats> res_stats; |
| 237 | int wait_for_pending_req_timeout_count; |
| 238 | |
| 239 | if (!DnsResponderClient::GetResolverInfo(mDnsClient.resolvService(), TEST_NETID, |
| 240 | &res_servers, &res_domains, &res_tls_servers, |
| 241 | &res_params, &res_stats, |
| 242 | &wait_for_pending_req_timeout_count)) { |
| 243 | ADD_FAILURE() << "GetResolverInfo failed"; |
| 244 | return false; |
| 245 | } |
| 246 | |
| 247 | if (res_servers.size() != res_stats.size()) { |
| 248 | ADD_FAILURE() << fmt::format("res_servers.size() != res_stats.size(): {} != {}", |
| 249 | res_servers.size(), res_stats.size()); |
| 250 | return false; |
| 251 | } |
| 252 | if (res_servers.size() != nameserversStats.size()) { |
| 253 | ADD_FAILURE() << fmt::format("res_servers.size() != nameserversStats.size(): {} != {}", |
| 254 | res_servers.size(), nameserversStats.size()); |
| 255 | return false; |
| 256 | } |
| 257 | |
| 258 | for (const auto& stats : nameserversStats) { |
| 259 | SCOPED_TRACE(stats.server); |
| 260 | const auto it = std::find(res_servers.begin(), res_servers.end(), stats.server); |
| 261 | if (it == res_servers.end()) { |
| 262 | ADD_FAILURE() << fmt::format("nameserver {} not found in the list {{{}}}", |
| 263 | stats.server, fmt::join(res_servers, ", ")); |
| 264 | return false; |
| 265 | } |
| 266 | const int index = std::distance(res_servers.begin(), it); |
| 267 | |
| 268 | // The check excludes rtt_avg, last_sample_time, and usable since they will be obsolete |
| 269 | // after |res_stats| is retrieved from NetConfig.dnsStats rather than NetConfig.nsstats. |
| 270 | EXPECT_EQ(res_stats[index].successes, stats.successes); |
| 271 | EXPECT_EQ(res_stats[index].errors, stats.errors); |
| 272 | EXPECT_EQ(res_stats[index].timeouts, stats.timeouts); |
| 273 | EXPECT_EQ(res_stats[index].internal_errors, stats.internal_errors); |
| 274 | } |
| 275 | |
| 276 | return true; |
| 277 | } |
| 278 | |
| 279 | // Since there's no way to terminate private DNS validation threads at any time. Tests that |
| 280 | // focus on the results of private DNS validation can interfere with each other if they use the |
| 281 | // same IP address for test servers. getUniqueIPv4Address() is a workaround to reduce the |
| 282 | // possibility of tests being flaky. A feasible solution is to forbid the validation threads, |
| 283 | // which are considered as outdated (e.g. switch the resolver to private DNS OFF mode), updating |
| 284 | // the result to the PrivateDnsConfiguration instance. |
| 285 | static std::string getUniqueIPv4Address() { |
| 286 | static int counter = 0; |
| 287 | return fmt::format("127.0.100.{}", (++counter & 0xff)); |
| 288 | } |
| 289 | |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 290 | DnsResponderClient mDnsClient; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 291 | |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 292 | // Use a shared static DNS listener for all tests to avoid registering lots of listeners |
| 293 | // which may be released late until process terminated. Currently, registered DNS listener |
| 294 | // is removed by binder death notification which is fired when the process hosting an |
| 295 | // IBinder has gone away. If every test in ResolverTest registers its DNS listener, Netd |
| 296 | // may temporarily hold lots of dead listeners until the unit test process terminates. |
| 297 | // TODO: Perhaps add an unregistering listener binder call or fork a listener process which |
| 298 | // could be terminated earlier. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 299 | static std::shared_ptr<DnsMetricsListener> |
Automerger Merge Worker | 19a291b | 2020-03-17 02:41:30 +0000 | [diff] [blame] | 300 | sDnsMetricsListener; // Initialized in SetUpTestSuite. |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 301 | |
| 302 | // Use a shared static death recipient to monitor the service death. The static death |
| 303 | // recipient could monitor the death not only during the test but also between tests. |
Automerger Merge Worker | 19a291b | 2020-03-17 02:41:30 +0000 | [diff] [blame] | 304 | static AIBinder_DeathRecipient* sResolvDeathRecipient; // Initialized in SetUpTestSuite. |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 305 | }; |
| 306 | |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 307 | // Initialize static member of class. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 308 | std::shared_ptr<DnsMetricsListener> ResolverTest::sDnsMetricsListener; |
| 309 | AIBinder_DeathRecipient* ResolverTest::sResolvDeathRecipient; |
Hungming Chen | 5bf0977 | 2019-04-25 11:16:13 +0800 | [diff] [blame] | 310 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 311 | TEST_F(ResolverTest, GetHostByName) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 312 | constexpr char nonexistent_host_name[] = "nonexistent.example.com."; |
| 313 | |
| 314 | test::DNSResponder dns; |
| 315 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, "1.2.3.3"}}); |
| 316 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 317 | |
| 318 | const hostent* result; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 319 | result = gethostbyname("nonexistent"); |
| 320 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, nonexistent_host_name)); |
| 321 | ASSERT_TRUE(result == nullptr); |
| 322 | ASSERT_EQ(HOST_NOT_FOUND, h_errno); |
| 323 | |
| 324 | dns.clearQueries(); |
| 325 | result = gethostbyname("hello"); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 326 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, kHelloExampleCom)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 327 | ASSERT_FALSE(result == nullptr); |
| 328 | ASSERT_EQ(4, result->h_length); |
| 329 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 330 | EXPECT_EQ("1.2.3.3", ToString(result)); |
| 331 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 332 | } |
| 333 | |
lifr | 4e4a2e0 | 2019-01-29 16:53:51 +0800 | [diff] [blame] | 334 | TEST_F(ResolverTest, GetHostByName_cnames) { |
| 335 | constexpr char host_name[] = "host.example.com."; |
| 336 | size_t cnamecount = 0; |
| 337 | test::DNSResponder dns; |
| 338 | |
| 339 | const std::vector<DnsRecord> records = { |
| 340 | {kHelloExampleCom, ns_type::ns_t_cname, "a.example.com."}, |
| 341 | {"a.example.com.", ns_type::ns_t_cname, "b.example.com."}, |
| 342 | {"b.example.com.", ns_type::ns_t_cname, "c.example.com."}, |
| 343 | {"c.example.com.", ns_type::ns_t_cname, "d.example.com."}, |
| 344 | {"d.example.com.", ns_type::ns_t_cname, "e.example.com."}, |
| 345 | {"e.example.com.", ns_type::ns_t_cname, host_name}, |
| 346 | {host_name, ns_type::ns_t_a, "1.2.3.3"}, |
| 347 | {host_name, ns_type::ns_t_aaaa, "2001:db8::42"}, |
| 348 | }; |
| 349 | StartDns(dns, records); |
| 350 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 351 | |
| 352 | // using gethostbyname2() to resolve ipv4 hello.example.com. to 1.2.3.3 |
| 353 | // Ensure the v4 address and cnames are correct |
| 354 | const hostent* result; |
| 355 | result = gethostbyname2("hello", AF_INET); |
| 356 | ASSERT_FALSE(result == nullptr); |
| 357 | |
| 358 | for (int i = 0; result != nullptr && result->h_aliases[i] != nullptr; i++) { |
| 359 | std::string domain_name = records[i].host_name.substr(0, records[i].host_name.size() - 1); |
| 360 | EXPECT_EQ(result->h_aliases[i], domain_name); |
| 361 | cnamecount++; |
| 362 | } |
| 363 | // The size of "Non-cname type" record in DNS records is 2 |
| 364 | ASSERT_EQ(cnamecount, records.size() - 2); |
| 365 | ASSERT_EQ(4, result->h_length); |
| 366 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 367 | EXPECT_EQ("1.2.3.3", ToString(result)); |
| 368 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 369 | EXPECT_EQ(1U, dns.queries().size()) << dns.dumpQueries(); |
| 370 | |
| 371 | // using gethostbyname2() to resolve ipv6 hello.example.com. to 2001:db8::42 |
| 372 | // Ensure the v6 address and cnames are correct |
| 373 | cnamecount = 0; |
| 374 | dns.clearQueries(); |
| 375 | result = gethostbyname2("hello", AF_INET6); |
| 376 | for (unsigned i = 0; result != nullptr && result->h_aliases[i] != nullptr; i++) { |
| 377 | std::string domain_name = records[i].host_name.substr(0, records[i].host_name.size() - 1); |
| 378 | EXPECT_EQ(result->h_aliases[i], domain_name); |
| 379 | cnamecount++; |
| 380 | } |
| 381 | // The size of "Non-cname type" DNS record in records is 2 |
| 382 | ASSERT_EQ(cnamecount, records.size() - 2); |
| 383 | ASSERT_FALSE(result == nullptr); |
| 384 | ASSERT_EQ(16, result->h_length); |
| 385 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 386 | EXPECT_EQ("2001:db8::42", ToString(result)); |
| 387 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 388 | } |
| 389 | |
| 390 | TEST_F(ResolverTest, GetHostByName_cnamesInfiniteLoop) { |
| 391 | test::DNSResponder dns; |
| 392 | const std::vector<DnsRecord> records = { |
| 393 | {kHelloExampleCom, ns_type::ns_t_cname, "a.example.com."}, |
| 394 | {"a.example.com.", ns_type::ns_t_cname, kHelloExampleCom}, |
| 395 | }; |
| 396 | StartDns(dns, records); |
| 397 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 398 | |
| 399 | const hostent* result; |
| 400 | result = gethostbyname2("hello", AF_INET); |
| 401 | ASSERT_TRUE(result == nullptr); |
| 402 | |
| 403 | dns.clearQueries(); |
| 404 | result = gethostbyname2("hello", AF_INET6); |
| 405 | ASSERT_TRUE(result == nullptr); |
| 406 | } |
| 407 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 408 | TEST_F(ResolverTest, GetHostByName_localhost) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 409 | constexpr char name_camelcase[] = "LocalHost"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 410 | constexpr char name_ip6_dot[] = "ip6-localhost."; |
| 411 | constexpr char name_ip6_fqdn[] = "ip6-localhost.example.com."; |
| 412 | |
| 413 | // Add a dummy nameserver which shouldn't receive any queries |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 414 | test::DNSResponder dns; |
| 415 | StartDns(dns, {}); |
| 416 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 417 | |
| 418 | // Expect no DNS queries; localhost is resolved via /etc/hosts |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 419 | const hostent* result = gethostbyname(kLocalHost); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 420 | EXPECT_TRUE(dns.queries().empty()) << dns.dumpQueries(); |
| 421 | ASSERT_FALSE(result == nullptr); |
| 422 | ASSERT_EQ(4, result->h_length); |
| 423 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 424 | EXPECT_EQ(kLocalHostAddr, ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 425 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 426 | |
| 427 | // Ensure the hosts file resolver ignores case of hostnames |
| 428 | result = gethostbyname(name_camelcase); |
| 429 | EXPECT_TRUE(dns.queries().empty()) << dns.dumpQueries(); |
| 430 | ASSERT_FALSE(result == nullptr); |
| 431 | ASSERT_EQ(4, result->h_length); |
| 432 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 433 | EXPECT_EQ(kLocalHostAddr, ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 434 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 435 | |
| 436 | // The hosts file also contains ip6-localhost, but gethostbyname() won't |
chenbruce | 018fdb2 | 2019-06-12 18:08:04 +0800 | [diff] [blame] | 437 | // return it. This would be easy to |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 438 | // change, but there's no point in changing the legacy behavior; new code |
| 439 | // should be calling getaddrinfo() anyway. |
| 440 | // So we check the legacy behavior, which results in amusing A-record |
| 441 | // lookups for ip6-localhost, with and without search domains appended. |
| 442 | dns.clearQueries(); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 443 | result = gethostbyname(kIp6LocalHost); |
Sehee Park | bbca020 | 2018-11-16 10:53:16 +0900 | [diff] [blame] | 444 | EXPECT_EQ(2U, dns.queries().size()) << dns.dumpQueries(); |
| 445 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, name_ip6_dot)) << dns.dumpQueries(); |
| 446 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, name_ip6_fqdn)) << dns.dumpQueries(); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 447 | ASSERT_TRUE(result == nullptr); |
| 448 | |
| 449 | // Finally, use gethostbyname2() to resolve ip6-localhost to ::1 from |
| 450 | // the hosts file. |
| 451 | dns.clearQueries(); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 452 | result = gethostbyname2(kIp6LocalHost, AF_INET6); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 453 | EXPECT_TRUE(dns.queries().empty()) << dns.dumpQueries(); |
| 454 | ASSERT_FALSE(result == nullptr); |
| 455 | ASSERT_EQ(16, result->h_length); |
| 456 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 457 | EXPECT_EQ(kIp6LocalHostAddr, ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 458 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 459 | } |
| 460 | |
| 461 | TEST_F(ResolverTest, GetHostByName_numeric) { |
| 462 | // Add a dummy nameserver which shouldn't receive any queries |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 463 | test::DNSResponder dns; |
| 464 | StartDns(dns, {}); |
| 465 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 466 | |
| 467 | // Numeric v4 address: expect no DNS queries |
| 468 | constexpr char numeric_v4[] = "192.168.0.1"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 469 | const hostent* result = gethostbyname(numeric_v4); |
Sehee Park | bbca020 | 2018-11-16 10:53:16 +0900 | [diff] [blame] | 470 | EXPECT_EQ(0U, dns.queries().size()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 471 | ASSERT_FALSE(result == nullptr); |
| 472 | ASSERT_EQ(4, result->h_length); // v4 |
| 473 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 474 | EXPECT_EQ(numeric_v4, ToString(result)); |
| 475 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 476 | |
| 477 | // gethostbyname() recognizes a v6 address, and fails with no DNS queries |
| 478 | constexpr char numeric_v6[] = "2001:db8::42"; |
| 479 | dns.clearQueries(); |
| 480 | result = gethostbyname(numeric_v6); |
Sehee Park | bbca020 | 2018-11-16 10:53:16 +0900 | [diff] [blame] | 481 | EXPECT_EQ(0U, dns.queries().size()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 482 | EXPECT_TRUE(result == nullptr); |
| 483 | |
| 484 | // Numeric v6 address with gethostbyname2(): succeeds with no DNS queries |
| 485 | dns.clearQueries(); |
| 486 | result = gethostbyname2(numeric_v6, AF_INET6); |
Sehee Park | bbca020 | 2018-11-16 10:53:16 +0900 | [diff] [blame] | 487 | EXPECT_EQ(0U, dns.queries().size()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 488 | ASSERT_FALSE(result == nullptr); |
| 489 | ASSERT_EQ(16, result->h_length); // v6 |
| 490 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 491 | EXPECT_EQ(numeric_v6, ToString(result)); |
| 492 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 493 | |
| 494 | // Numeric v6 address with scope work with getaddrinfo(), |
| 495 | // but gethostbyname2() does not understand them; it issues two dns |
| 496 | // queries, then fails. This hardly ever happens, there's no point |
| 497 | // in fixing this. This test simply verifies the current (bogus) |
| 498 | // behavior to avoid further regressions (like crashes, or leaks). |
| 499 | constexpr char numeric_v6_scope[] = "fe80::1%lo"; |
| 500 | dns.clearQueries(); |
| 501 | result = gethostbyname2(numeric_v6_scope, AF_INET6); |
Sehee Park | bbca020 | 2018-11-16 10:53:16 +0900 | [diff] [blame] | 502 | EXPECT_EQ(2U, dns.queries().size()); // OUCH! |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 503 | ASSERT_TRUE(result == nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 504 | } |
| 505 | |
| 506 | TEST_F(ResolverTest, BinderSerialization) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 507 | std::vector<int> params_offsets = { |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 508 | IDnsResolver::RESOLVER_PARAMS_SAMPLE_VALIDITY, |
| 509 | IDnsResolver::RESOLVER_PARAMS_SUCCESS_THRESHOLD, |
| 510 | IDnsResolver::RESOLVER_PARAMS_MIN_SAMPLES, |
| 511 | IDnsResolver::RESOLVER_PARAMS_MAX_SAMPLES, |
| 512 | IDnsResolver::RESOLVER_PARAMS_BASE_TIMEOUT_MSEC, |
| 513 | IDnsResolver::RESOLVER_PARAMS_RETRY_COUNT, |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 514 | }; |
Bernie Innocenti | b102dd2 | 2018-12-04 14:57:48 +0900 | [diff] [blame] | 515 | const int size = static_cast<int>(params_offsets.size()); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 516 | EXPECT_EQ(size, IDnsResolver::RESOLVER_PARAMS_COUNT); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 517 | std::sort(params_offsets.begin(), params_offsets.end()); |
Bernie Innocenti | b102dd2 | 2018-12-04 14:57:48 +0900 | [diff] [blame] | 518 | for (int i = 0; i < size; ++i) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 519 | EXPECT_EQ(params_offsets[i], i); |
| 520 | } |
| 521 | } |
| 522 | |
| 523 | TEST_F(ResolverTest, GetHostByName_Binder) { |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 524 | std::vector<std::string> domains = {"example.com"}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 525 | std::vector<std::unique_ptr<test::DNSResponder>> dns; |
| 526 | std::vector<std::string> servers; |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 527 | std::vector<DnsResponderClient::Mapping> mappings; |
| 528 | ASSERT_NO_FATAL_FAILURE(mDnsClient.SetupMappings(1, domains, &mappings)); |
| 529 | ASSERT_NO_FATAL_FAILURE(mDnsClient.SetupDNSServers(4, mappings, &dns, &servers)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 530 | ASSERT_EQ(1U, mappings.size()); |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 531 | const DnsResponderClient::Mapping& mapping = mappings[0]; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 532 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 533 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, domains, kDefaultParams)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 534 | |
| 535 | const hostent* result = gethostbyname(mapping.host.c_str()); |
Bernie Innocenti | b102dd2 | 2018-12-04 14:57:48 +0900 | [diff] [blame] | 536 | const size_t total_queries = |
Luke Huang | fde8248 | 2019-06-04 01:04:53 +0800 | [diff] [blame] | 537 | std::accumulate(dns.begin(), dns.end(), 0, [&mapping](size_t total, auto& d) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 538 | return total + GetNumQueriesForType(*d, ns_type::ns_t_a, mapping.entry.c_str()); |
| 539 | }); |
| 540 | |
| 541 | EXPECT_LE(1U, total_queries); |
| 542 | ASSERT_FALSE(result == nullptr); |
| 543 | ASSERT_EQ(4, result->h_length); |
| 544 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 545 | EXPECT_EQ(mapping.ip4, ToString(result)); |
| 546 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 547 | |
| 548 | std::vector<std::string> res_servers; |
| 549 | std::vector<std::string> res_domains; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 550 | std::vector<std::string> res_tls_servers; |
Bernie Innocenti | 758005f | 2019-02-19 18:08:36 +0900 | [diff] [blame] | 551 | res_params res_params; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 552 | std::vector<ResolverStats> res_stats; |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 553 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 554 | ASSERT_TRUE(DnsResponderClient::GetResolverInfo( |
| 555 | mDnsClient.resolvService(), TEST_NETID, &res_servers, &res_domains, &res_tls_servers, |
| 556 | &res_params, &res_stats, &wait_for_pending_req_timeout_count)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 557 | EXPECT_EQ(servers.size(), res_servers.size()); |
| 558 | EXPECT_EQ(domains.size(), res_domains.size()); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 559 | EXPECT_EQ(0U, res_tls_servers.size()); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 560 | ASSERT_EQ(static_cast<size_t>(IDnsResolver::RESOLVER_PARAMS_COUNT), kDefaultParams.size()); |
| 561 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_SAMPLE_VALIDITY], |
| 562 | res_params.sample_validity); |
| 563 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_SUCCESS_THRESHOLD], |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 564 | res_params.success_threshold); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 565 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_MIN_SAMPLES], res_params.min_samples); |
| 566 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_MAX_SAMPLES], res_params.max_samples); |
| 567 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_BASE_TIMEOUT_MSEC], |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 568 | res_params.base_timeout_msec); |
| 569 | EXPECT_EQ(servers.size(), res_stats.size()); |
| 570 | |
Bernie Innocenti | 0c067e4 | 2019-04-01 15:33:16 +0900 | [diff] [blame] | 571 | EXPECT_THAT(res_servers, testing::UnorderedElementsAreArray(servers)); |
| 572 | EXPECT_THAT(res_domains, testing::UnorderedElementsAreArray(domains)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 573 | } |
| 574 | |
| 575 | TEST_F(ResolverTest, GetAddrInfo) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 576 | constexpr char listen_addr[] = "127.0.0.4"; |
| 577 | constexpr char listen_addr2[] = "127.0.0.5"; |
| 578 | constexpr char host_name[] = "howdy.example.com."; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 579 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 580 | const std::vector<DnsRecord> records = { |
| 581 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 582 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 583 | }; |
| 584 | test::DNSResponder dns(listen_addr); |
| 585 | test::DNSResponder dns2(listen_addr2); |
| 586 | StartDns(dns, records); |
| 587 | StartDns(dns2, records); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 588 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 589 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr})); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 590 | dns.clearQueries(); |
| 591 | dns2.clearQueries(); |
| 592 | |
| 593 | ScopedAddrinfo result = safe_getaddrinfo("howdy", nullptr, nullptr); |
| 594 | EXPECT_TRUE(result != nullptr); |
| 595 | size_t found = GetNumQueries(dns, host_name); |
| 596 | EXPECT_LE(1U, found); |
| 597 | // Could be A or AAAA |
| 598 | std::string result_str = ToString(result); |
| 599 | EXPECT_TRUE(result_str == "1.2.3.4" || result_str == "::1.2.3.4") |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 600 | << ", result_str='" << result_str << "'"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 601 | |
| 602 | // Verify that the name is cached. |
| 603 | size_t old_found = found; |
| 604 | result = safe_getaddrinfo("howdy", nullptr, nullptr); |
| 605 | EXPECT_TRUE(result != nullptr); |
| 606 | found = GetNumQueries(dns, host_name); |
| 607 | EXPECT_LE(1U, found); |
| 608 | EXPECT_EQ(old_found, found); |
| 609 | result_str = ToString(result); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 610 | EXPECT_TRUE(result_str == "1.2.3.4" || result_str == "::1.2.3.4") << result_str; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 611 | |
| 612 | // Change the DNS resolver, ensure that queries are still cached. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 613 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr2})); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 614 | dns.clearQueries(); |
| 615 | dns2.clearQueries(); |
| 616 | |
| 617 | result = safe_getaddrinfo("howdy", nullptr, nullptr); |
| 618 | EXPECT_TRUE(result != nullptr); |
| 619 | found = GetNumQueries(dns, host_name); |
| 620 | size_t found2 = GetNumQueries(dns2, host_name); |
| 621 | EXPECT_EQ(0U, found); |
| 622 | EXPECT_LE(0U, found2); |
| 623 | |
| 624 | // Could be A or AAAA |
| 625 | result_str = ToString(result); |
| 626 | EXPECT_TRUE(result_str == "1.2.3.4" || result_str == "::1.2.3.4") |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 627 | << ", result_str='" << result_str << "'"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 628 | } |
| 629 | |
| 630 | TEST_F(ResolverTest, GetAddrInfoV4) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 631 | test::DNSResponder dns; |
| 632 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, "1.2.3.5"}}); |
| 633 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 634 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 635 | const addrinfo hints = {.ai_family = AF_INET}; |
| 636 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 637 | EXPECT_TRUE(result != nullptr); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 638 | EXPECT_EQ(1U, GetNumQueries(dns, kHelloExampleCom)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 639 | EXPECT_EQ("1.2.3.5", ToString(result)); |
| 640 | } |
| 641 | |
| 642 | TEST_F(ResolverTest, GetAddrInfo_localhost) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 643 | // Add a dummy nameserver which shouldn't receive any queries |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 644 | test::DNSResponder dns; |
| 645 | StartDns(dns, {}); |
| 646 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 647 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 648 | ScopedAddrinfo result = safe_getaddrinfo(kLocalHost, nullptr, nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 649 | EXPECT_TRUE(result != nullptr); |
| 650 | // Expect no DNS queries; localhost is resolved via /etc/hosts |
| 651 | EXPECT_TRUE(dns.queries().empty()) << dns.dumpQueries(); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 652 | EXPECT_EQ(kLocalHostAddr, ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 653 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 654 | result = safe_getaddrinfo(kIp6LocalHost, nullptr, nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 655 | EXPECT_TRUE(result != nullptr); |
| 656 | // Expect no DNS queries; ip6-localhost is resolved via /etc/hosts |
| 657 | EXPECT_TRUE(dns.queries().empty()) << dns.dumpQueries(); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 658 | EXPECT_EQ(kIp6LocalHostAddr, ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 659 | } |
| 660 | |
Luke Huang | d8ac475 | 2019-06-18 17:05:47 +0800 | [diff] [blame] | 661 | TEST_F(ResolverTest, GetAddrInfo_InvalidSocketType) { |
| 662 | test::DNSResponder dns; |
| 663 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, "1.2.3.5"}}); |
| 664 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 665 | |
| 666 | // TODO: Test other invalid socket types. |
| 667 | const addrinfo hints = { |
| 668 | .ai_family = AF_UNSPEC, |
Luke Huang | d8ac475 | 2019-06-18 17:05:47 +0800 | [diff] [blame] | 669 | .ai_socktype = SOCK_PACKET, |
| 670 | }; |
| 671 | addrinfo* result = nullptr; |
| 672 | // This is a valid hint, but the query won't be sent because the socket type is |
| 673 | // not supported. |
| 674 | EXPECT_EQ(EAI_NODATA, getaddrinfo("hello", nullptr, &hints, &result)); |
| 675 | ScopedAddrinfo result_cleanup(result); |
| 676 | EXPECT_EQ(nullptr, result); |
| 677 | } |
| 678 | |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 679 | // Verify if the resolver correctly handle multiple queries simultaneously |
| 680 | // step 1: set dns server#1 into deferred responding mode. |
| 681 | // step 2: thread#1 query "hello.example.com." --> resolver send query to server#1. |
| 682 | // step 3: thread#2 query "hello.example.com." --> resolver hold the request and wait for |
| 683 | // response of previous pending query sent by thread#1. |
| 684 | // step 4: thread#3 query "konbanha.example.com." --> resolver send query to server#3. Server |
| 685 | // respond to resolver immediately. |
| 686 | // step 5: check if server#1 get 1 query by thread#1, server#2 get 0 query, server#3 get 1 query. |
| 687 | // step 6: resume dns server#1 to respond dns query in step#2. |
| 688 | // step 7: thread#1 and #2 should get returned from DNS query after step#6. Also, check the |
| 689 | // number of queries in server#2 is 0 to ensure thread#2 does not wake up unexpectedly |
| 690 | // before signaled by thread#1. |
| 691 | TEST_F(ResolverTest, GetAddrInfoV4_deferred_resp) { |
| 692 | const char* listen_addr1 = "127.0.0.9"; |
| 693 | const char* listen_addr2 = "127.0.0.10"; |
| 694 | const char* listen_addr3 = "127.0.0.11"; |
| 695 | const char* listen_srv = "53"; |
| 696 | const char* host_name_deferred = "hello.example.com."; |
| 697 | const char* host_name_normal = "konbanha.example.com."; |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 698 | test::DNSResponder dns1(listen_addr1, listen_srv, ns_rcode::ns_r_servfail); |
| 699 | test::DNSResponder dns2(listen_addr2, listen_srv, ns_rcode::ns_r_servfail); |
| 700 | test::DNSResponder dns3(listen_addr3, listen_srv, ns_rcode::ns_r_servfail); |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 701 | dns1.addMapping(host_name_deferred, ns_type::ns_t_a, "1.2.3.4"); |
| 702 | dns2.addMapping(host_name_deferred, ns_type::ns_t_a, "1.2.3.4"); |
| 703 | dns3.addMapping(host_name_normal, ns_type::ns_t_a, "1.2.3.5"); |
| 704 | ASSERT_TRUE(dns1.startServer()); |
| 705 | ASSERT_TRUE(dns2.startServer()); |
| 706 | ASSERT_TRUE(dns3.startServer()); |
| 707 | const std::vector<std::string> servers_for_t1 = {listen_addr1}; |
| 708 | const std::vector<std::string> servers_for_t2 = {listen_addr2}; |
| 709 | const std::vector<std::string> servers_for_t3 = {listen_addr3}; |
| 710 | addrinfo hints = {.ai_family = AF_INET}; |
| 711 | const std::vector<int> params = {300, 25, 8, 8, 5000}; |
| 712 | bool t3_task_done = false; |
| 713 | |
| 714 | dns1.setDeferredResp(true); |
| 715 | std::thread t1([&, this]() { |
| 716 | ASSERT_TRUE( |
| 717 | mDnsClient.SetResolversForNetwork(servers_for_t1, kDefaultSearchDomains, params)); |
| 718 | ScopedAddrinfo result = safe_getaddrinfo(host_name_deferred, nullptr, &hints); |
| 719 | // t3's dns query should got returned first |
| 720 | EXPECT_TRUE(t3_task_done); |
| 721 | EXPECT_EQ(1U, GetNumQueries(dns1, host_name_deferred)); |
| 722 | EXPECT_TRUE(result != nullptr); |
| 723 | EXPECT_EQ("1.2.3.4", ToString(result)); |
| 724 | }); |
| 725 | |
| 726 | // ensuring t1 and t2 handler functions are processed in order |
| 727 | usleep(100 * 1000); |
| 728 | std::thread t2([&, this]() { |
| 729 | ASSERT_TRUE( |
| 730 | mDnsClient.SetResolversForNetwork(servers_for_t2, kDefaultSearchDomains, params)); |
| 731 | ScopedAddrinfo result = safe_getaddrinfo(host_name_deferred, nullptr, &hints); |
| 732 | EXPECT_TRUE(t3_task_done); |
| 733 | EXPECT_EQ(0U, GetNumQueries(dns2, host_name_deferred)); |
| 734 | EXPECT_TRUE(result != nullptr); |
| 735 | EXPECT_EQ("1.2.3.4", ToString(result)); |
| 736 | |
| 737 | std::vector<std::string> res_servers; |
| 738 | std::vector<std::string> res_domains; |
| 739 | std::vector<std::string> res_tls_servers; |
Bernie Innocenti | 758005f | 2019-02-19 18:08:36 +0900 | [diff] [blame] | 740 | res_params res_params; |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 741 | std::vector<ResolverStats> res_stats; |
| 742 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 743 | ASSERT_TRUE(DnsResponderClient::GetResolverInfo( |
| 744 | mDnsClient.resolvService(), TEST_NETID, &res_servers, &res_domains, |
| 745 | &res_tls_servers, &res_params, &res_stats, &wait_for_pending_req_timeout_count)); |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 746 | EXPECT_EQ(0, wait_for_pending_req_timeout_count); |
| 747 | }); |
| 748 | |
| 749 | // ensuring t2 and t3 handler functions are processed in order |
| 750 | usleep(100 * 1000); |
| 751 | std::thread t3([&, this]() { |
| 752 | ASSERT_TRUE( |
| 753 | mDnsClient.SetResolversForNetwork(servers_for_t3, kDefaultSearchDomains, params)); |
| 754 | ScopedAddrinfo result = safe_getaddrinfo(host_name_normal, nullptr, &hints); |
| 755 | EXPECT_EQ(1U, GetNumQueries(dns1, host_name_deferred)); |
| 756 | EXPECT_EQ(0U, GetNumQueries(dns2, host_name_deferred)); |
| 757 | EXPECT_EQ(1U, GetNumQueries(dns3, host_name_normal)); |
| 758 | EXPECT_TRUE(result != nullptr); |
| 759 | EXPECT_EQ("1.2.3.5", ToString(result)); |
| 760 | |
| 761 | t3_task_done = true; |
| 762 | dns1.setDeferredResp(false); |
| 763 | }); |
| 764 | t3.join(); |
| 765 | t1.join(); |
| 766 | t2.join(); |
| 767 | } |
| 768 | |
lifr | 4e4a2e0 | 2019-01-29 16:53:51 +0800 | [diff] [blame] | 769 | TEST_F(ResolverTest, GetAddrInfo_cnames) { |
| 770 | constexpr char host_name[] = "host.example.com."; |
| 771 | test::DNSResponder dns; |
| 772 | const std::vector<DnsRecord> records = { |
| 773 | {kHelloExampleCom, ns_type::ns_t_cname, "a.example.com."}, |
| 774 | {"a.example.com.", ns_type::ns_t_cname, "b.example.com."}, |
| 775 | {"b.example.com.", ns_type::ns_t_cname, "c.example.com."}, |
| 776 | {"c.example.com.", ns_type::ns_t_cname, "d.example.com."}, |
| 777 | {"d.example.com.", ns_type::ns_t_cname, "e.example.com."}, |
| 778 | {"e.example.com.", ns_type::ns_t_cname, host_name}, |
| 779 | {host_name, ns_type::ns_t_a, "1.2.3.3"}, |
| 780 | {host_name, ns_type::ns_t_aaaa, "2001:db8::42"}, |
| 781 | }; |
| 782 | StartDns(dns, records); |
| 783 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 784 | |
| 785 | addrinfo hints = {.ai_family = AF_INET}; |
| 786 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 787 | EXPECT_TRUE(result != nullptr); |
| 788 | EXPECT_EQ("1.2.3.3", ToString(result)); |
| 789 | |
| 790 | dns.clearQueries(); |
| 791 | hints = {.ai_family = AF_INET6}; |
| 792 | result = safe_getaddrinfo("hello", nullptr, &hints); |
| 793 | EXPECT_TRUE(result != nullptr); |
| 794 | EXPECT_EQ("2001:db8::42", ToString(result)); |
| 795 | } |
| 796 | |
| 797 | TEST_F(ResolverTest, GetAddrInfo_cnamesNoIpAddress) { |
| 798 | test::DNSResponder dns; |
| 799 | const std::vector<DnsRecord> records = { |
| 800 | {kHelloExampleCom, ns_type::ns_t_cname, "a.example.com."}, |
| 801 | }; |
| 802 | StartDns(dns, records); |
| 803 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 804 | |
| 805 | addrinfo hints = {.ai_family = AF_INET}; |
| 806 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 807 | EXPECT_TRUE(result == nullptr); |
| 808 | |
| 809 | dns.clearQueries(); |
| 810 | hints = {.ai_family = AF_INET6}; |
| 811 | result = safe_getaddrinfo("hello", nullptr, &hints); |
| 812 | EXPECT_TRUE(result == nullptr); |
| 813 | } |
| 814 | |
| 815 | TEST_F(ResolverTest, GetAddrInfo_cnamesIllegalRdata) { |
| 816 | test::DNSResponder dns; |
| 817 | const std::vector<DnsRecord> records = { |
| 818 | {kHelloExampleCom, ns_type::ns_t_cname, ".!#?"}, |
| 819 | }; |
| 820 | StartDns(dns, records); |
| 821 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 822 | |
| 823 | addrinfo hints = {.ai_family = AF_INET}; |
| 824 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 825 | EXPECT_TRUE(result == nullptr); |
| 826 | |
| 827 | dns.clearQueries(); |
| 828 | hints = {.ai_family = AF_INET6}; |
| 829 | result = safe_getaddrinfo("hello", nullptr, &hints); |
| 830 | EXPECT_TRUE(result == nullptr); |
| 831 | } |
| 832 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 833 | TEST_F(ResolverTest, MultidomainResolution) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 834 | constexpr char host_name[] = "nihao.example2.com."; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 835 | std::vector<std::string> searchDomains = {"example1.com", "example2.com", "example3.com"}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 836 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 837 | test::DNSResponder dns("127.0.0.6"); |
| 838 | StartDns(dns, {{host_name, ns_type::ns_t_a, "1.2.3.3"}}); |
| 839 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({"127.0.0.6"}, searchDomains)); |
| 840 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 841 | const hostent* result = gethostbyname("nihao"); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 842 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 843 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, host_name)); |
| 844 | ASSERT_FALSE(result == nullptr); |
| 845 | ASSERT_EQ(4, result->h_length); |
| 846 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 847 | EXPECT_EQ("1.2.3.3", ToString(result)); |
| 848 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 849 | } |
| 850 | |
| 851 | TEST_F(ResolverTest, GetAddrInfoV6_numeric) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 852 | constexpr char host_name[] = "ohayou.example.com."; |
| 853 | constexpr char numeric_addr[] = "fe80::1%lo"; |
| 854 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 855 | test::DNSResponder dns; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 856 | dns.setResponseProbability(0.0); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 857 | StartDns(dns, {{host_name, ns_type::ns_t_aaaa, "2001:db8::5"}}); |
| 858 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 859 | |
| 860 | addrinfo hints = {.ai_family = AF_INET6}; |
| 861 | ScopedAddrinfo result = safe_getaddrinfo(numeric_addr, nullptr, &hints); |
| 862 | EXPECT_TRUE(result != nullptr); |
| 863 | EXPECT_EQ(numeric_addr, ToString(result)); |
| 864 | EXPECT_TRUE(dns.queries().empty()); // Ensure no DNS queries were sent out |
| 865 | |
| 866 | // Now try a non-numeric hostname query with the AI_NUMERICHOST flag set. |
| 867 | // We should fail without sending out a DNS query. |
| 868 | hints.ai_flags |= AI_NUMERICHOST; |
| 869 | result = safe_getaddrinfo(host_name, nullptr, &hints); |
| 870 | EXPECT_TRUE(result == nullptr); |
| 871 | EXPECT_TRUE(dns.queries().empty()); // Ensure no DNS queries were sent out |
| 872 | } |
| 873 | |
| 874 | TEST_F(ResolverTest, GetAddrInfoV6_failing) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 875 | constexpr char listen_addr0[] = "127.0.0.7"; |
| 876 | constexpr char listen_addr1[] = "127.0.0.8"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 877 | const char* host_name = "ohayou.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 878 | |
| 879 | test::DNSResponder dns0(listen_addr0); |
| 880 | test::DNSResponder dns1(listen_addr1); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 881 | dns0.setResponseProbability(0.0); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 882 | StartDns(dns0, {{host_name, ns_type::ns_t_aaaa, "2001:db8::5"}}); |
| 883 | StartDns(dns1, {{host_name, ns_type::ns_t_aaaa, "2001:db8::6"}}); |
| 884 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 885 | std::vector<std::string> servers = {listen_addr0, listen_addr1}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 886 | // <sample validity in s> <success threshold in percent> <min samples> <max samples> |
| 887 | int sample_count = 8; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 888 | const std::vector<int> params = {300, 25, sample_count, sample_count}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 889 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, kDefaultSearchDomains, params)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 890 | |
| 891 | // Repeatedly perform resolutions for non-existing domains until MAXNSSAMPLES resolutions have |
| 892 | // reached the dns0, which is set to fail. No more requests should then arrive at that server |
| 893 | // for the next sample_lifetime seconds. |
| 894 | // TODO: This approach is implementation-dependent, change once metrics reporting is available. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 895 | const addrinfo hints = {.ai_family = AF_INET6}; |
Bernie Innocenti | b102dd2 | 2018-12-04 14:57:48 +0900 | [diff] [blame] | 896 | for (int i = 0; i < sample_count; ++i) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 897 | std::string domain = StringPrintf("nonexistent%d", i); |
| 898 | ScopedAddrinfo result = safe_getaddrinfo(domain.c_str(), nullptr, &hints); |
| 899 | } |
| 900 | // Due to 100% errors for all possible samples, the server should be ignored from now on and |
| 901 | // only the second one used for all following queries, until NSSAMPLE_VALIDITY is reached. |
| 902 | dns0.clearQueries(); |
| 903 | dns1.clearQueries(); |
| 904 | ScopedAddrinfo result = safe_getaddrinfo("ohayou", nullptr, &hints); |
| 905 | EXPECT_TRUE(result != nullptr); |
| 906 | EXPECT_EQ(0U, GetNumQueries(dns0, host_name)); |
| 907 | EXPECT_EQ(1U, GetNumQueries(dns1, host_name)); |
| 908 | } |
| 909 | |
| 910 | TEST_F(ResolverTest, GetAddrInfoV6_nonresponsive) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 911 | constexpr char listen_addr0[] = "127.0.0.7"; |
| 912 | constexpr char listen_addr1[] = "127.0.0.8"; |
| 913 | constexpr char listen_srv[] = "53"; |
| 914 | constexpr char host_name1[] = "ohayou.example.com."; |
| 915 | constexpr char host_name2[] = "ciao.example.com."; |
Luke Huang | 483cf33 | 2019-06-03 17:24:51 +0800 | [diff] [blame] | 916 | const std::vector<std::string> defaultSearchDomain = {"example.com"}; |
| 917 | // The minimal timeout is 1000ms, so we can't decrease timeout |
| 918 | // So reduce retry count. |
| 919 | const std::vector<int> reduceRetryParams = { |
| 920 | 300, // sample validity in seconds |
| 921 | 25, // success threshod in percent |
| 922 | 8, 8, // {MIN,MAX}_SAMPLES |
| 923 | 1000, // BASE_TIMEOUT_MSEC |
| 924 | 1, // retry count |
| 925 | }; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 926 | const std::vector<DnsRecord> records0 = { |
| 927 | {host_name1, ns_type::ns_t_aaaa, "2001:db8::5"}, |
| 928 | {host_name2, ns_type::ns_t_aaaa, "2001:db8::5"}, |
| 929 | }; |
| 930 | const std::vector<DnsRecord> records1 = { |
| 931 | {host_name1, ns_type::ns_t_aaaa, "2001:db8::6"}, |
| 932 | {host_name2, ns_type::ns_t_aaaa, "2001:db8::6"}, |
| 933 | }; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 934 | |
| 935 | // dns0 does not respond with 100% probability, while |
| 936 | // dns1 responds normally, at least initially. |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 937 | test::DNSResponder dns0(listen_addr0, listen_srv, static_cast<ns_rcode>(-1)); |
| 938 | test::DNSResponder dns1(listen_addr1, listen_srv, static_cast<ns_rcode>(-1)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 939 | dns0.setResponseProbability(0.0); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 940 | StartDns(dns0, records0); |
| 941 | StartDns(dns1, records1); |
Luke Huang | 483cf33 | 2019-06-03 17:24:51 +0800 | [diff] [blame] | 942 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr0, listen_addr1}, defaultSearchDomain, |
| 943 | reduceRetryParams)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 944 | |
Luke Huang | 483cf33 | 2019-06-03 17:24:51 +0800 | [diff] [blame] | 945 | // Specify ai_socktype to make getaddrinfo will only query 1 time |
| 946 | const addrinfo hints = {.ai_family = AF_INET6, .ai_socktype = SOCK_STREAM}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 947 | |
| 948 | // dns0 will ignore the request, and we'll fallback to dns1 after the first |
| 949 | // retry. |
| 950 | ScopedAddrinfo result = safe_getaddrinfo(host_name1, nullptr, &hints); |
| 951 | EXPECT_TRUE(result != nullptr); |
| 952 | EXPECT_EQ(1U, GetNumQueries(dns0, host_name1)); |
| 953 | EXPECT_EQ(1U, GetNumQueries(dns1, host_name1)); |
| 954 | |
| 955 | // Now make dns1 also ignore 100% requests... The resolve should alternate |
Luke Huang | 483cf33 | 2019-06-03 17:24:51 +0800 | [diff] [blame] | 956 | // queries between the nameservers and fail |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 957 | dns1.setResponseProbability(0.0); |
| 958 | addrinfo* result2 = nullptr; |
| 959 | EXPECT_EQ(EAI_NODATA, getaddrinfo(host_name2, nullptr, &hints, &result2)); |
| 960 | EXPECT_EQ(nullptr, result2); |
Luke Huang | 483cf33 | 2019-06-03 17:24:51 +0800 | [diff] [blame] | 961 | EXPECT_EQ(1U, GetNumQueries(dns0, host_name2)); |
| 962 | EXPECT_EQ(1U, GetNumQueries(dns1, host_name2)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 963 | } |
| 964 | |
| 965 | TEST_F(ResolverTest, GetAddrInfoV6_concurrent) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 966 | constexpr char listen_addr0[] = "127.0.0.9"; |
| 967 | constexpr char listen_addr1[] = "127.0.0.10"; |
| 968 | constexpr char listen_addr2[] = "127.0.0.11"; |
| 969 | constexpr char host_name[] = "konbanha.example.com."; |
| 970 | |
| 971 | test::DNSResponder dns0(listen_addr0); |
| 972 | test::DNSResponder dns1(listen_addr1); |
| 973 | test::DNSResponder dns2(listen_addr2); |
| 974 | StartDns(dns0, {{host_name, ns_type::ns_t_aaaa, "2001:db8::5"}}); |
| 975 | StartDns(dns1, {{host_name, ns_type::ns_t_aaaa, "2001:db8::6"}}); |
| 976 | StartDns(dns2, {{host_name, ns_type::ns_t_aaaa, "2001:db8::7"}}); |
| 977 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 978 | const std::vector<std::string> servers = {listen_addr0, listen_addr1, listen_addr2}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 979 | std::vector<std::thread> threads(10); |
| 980 | for (std::thread& thread : threads) { |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 981 | thread = std::thread([this, &servers]() { |
| 982 | unsigned delay = arc4random_uniform(1 * 1000 * 1000); // <= 1s |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 983 | usleep(delay); |
| 984 | std::vector<std::string> serverSubset; |
| 985 | for (const auto& server : servers) { |
| 986 | if (arc4random_uniform(2)) { |
| 987 | serverSubset.push_back(server); |
| 988 | } |
| 989 | } |
| 990 | if (serverSubset.empty()) serverSubset = servers; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 991 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(serverSubset)); |
| 992 | const addrinfo hints = {.ai_family = AF_INET6}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 993 | addrinfo* result = nullptr; |
| 994 | int rv = getaddrinfo("konbanha", nullptr, &hints, &result); |
| 995 | EXPECT_EQ(0, rv) << "error [" << rv << "] " << gai_strerror(rv); |
| 996 | if (result) { |
| 997 | freeaddrinfo(result); |
| 998 | result = nullptr; |
| 999 | } |
| 1000 | }); |
| 1001 | } |
| 1002 | for (std::thread& thread : threads) { |
| 1003 | thread.join(); |
| 1004 | } |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 1005 | |
| 1006 | std::vector<std::string> res_servers; |
| 1007 | std::vector<std::string> res_domains; |
| 1008 | std::vector<std::string> res_tls_servers; |
Bernie Innocenti | 758005f | 2019-02-19 18:08:36 +0900 | [diff] [blame] | 1009 | res_params res_params; |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 1010 | std::vector<ResolverStats> res_stats; |
| 1011 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1012 | ASSERT_TRUE(DnsResponderClient::GetResolverInfo( |
| 1013 | mDnsClient.resolvService(), TEST_NETID, &res_servers, &res_domains, &res_tls_servers, |
| 1014 | &res_params, &res_stats, &wait_for_pending_req_timeout_count)); |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 1015 | EXPECT_EQ(0, wait_for_pending_req_timeout_count); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1016 | } |
| 1017 | |
Mike Yu | 8ac6340 | 2019-12-02 15:28:38 +0800 | [diff] [blame] | 1018 | TEST_F(ResolverTest, SkipBadServersDueToInternalError) { |
| 1019 | constexpr char listen_addr1[] = "fe80::1"; |
| 1020 | constexpr char listen_addr2[] = "255.255.255.255"; |
| 1021 | constexpr char listen_addr3[] = "127.0.0.3"; |
| 1022 | |
| 1023 | test::DNSResponder dns(listen_addr3); |
| 1024 | ASSERT_TRUE(dns.startServer()); |
| 1025 | |
| 1026 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 1027 | parcel.servers = {listen_addr1, listen_addr2, listen_addr3}; |
| 1028 | |
| 1029 | // Bad servers can be distinguished after two attempts. |
| 1030 | parcel.minSamples = 2; |
| 1031 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 1032 | |
| 1033 | // Start querying five times. |
| 1034 | for (int i = 0; i < 5; i++) { |
| 1035 | std::string hostName = StringPrintf("hello%d.com.", i); |
| 1036 | dns.addMapping(hostName, ns_type::ns_t_a, "1.2.3.4"); |
| 1037 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 1038 | EXPECT_TRUE(safe_getaddrinfo(hostName.c_str(), nullptr, &hints) != nullptr); |
| 1039 | } |
| 1040 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 1041 | const std::vector<NameserverStats> expectedCleartextDnsStats = { |
| 1042 | NameserverStats(listen_addr1).setInternalErrors(2), |
| 1043 | NameserverStats(listen_addr2).setInternalErrors(2), |
| 1044 | NameserverStats(listen_addr3).setSuccesses(5), |
| 1045 | }; |
| 1046 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
Mike Yu | 8ac6340 | 2019-12-02 15:28:38 +0800 | [diff] [blame] | 1047 | } |
| 1048 | |
| 1049 | TEST_F(ResolverTest, SkipBadServersDueToTimeout) { |
| 1050 | constexpr char listen_addr1[] = "127.0.0.3"; |
| 1051 | constexpr char listen_addr2[] = "127.0.0.4"; |
| 1052 | |
| 1053 | // Set dns1 non-responsive and dns2 workable. |
| 1054 | test::DNSResponder dns1(listen_addr1, test::kDefaultListenService, static_cast<ns_rcode>(-1)); |
| 1055 | test::DNSResponder dns2(listen_addr2); |
| 1056 | dns1.setResponseProbability(0.0); |
| 1057 | ASSERT_TRUE(dns1.startServer()); |
| 1058 | ASSERT_TRUE(dns2.startServer()); |
| 1059 | |
| 1060 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 1061 | parcel.servers = {listen_addr1, listen_addr2}; |
| 1062 | |
| 1063 | // Bad servers can be distinguished after two attempts. |
| 1064 | parcel.minSamples = 2; |
| 1065 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 1066 | |
| 1067 | // Start querying five times. |
| 1068 | for (int i = 0; i < 5; i++) { |
| 1069 | std::string hostName = StringPrintf("hello%d.com.", i); |
| 1070 | dns1.addMapping(hostName, ns_type::ns_t_a, "1.2.3.4"); |
| 1071 | dns2.addMapping(hostName, ns_type::ns_t_a, "1.2.3.5"); |
| 1072 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 1073 | EXPECT_TRUE(safe_getaddrinfo(hostName.c_str(), nullptr, &hints) != nullptr); |
| 1074 | } |
| 1075 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 1076 | const std::vector<NameserverStats> expectedCleartextDnsStats = { |
| 1077 | NameserverStats(listen_addr1).setTimeouts(2), |
| 1078 | NameserverStats(listen_addr2).setSuccesses(5), |
| 1079 | }; |
| 1080 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
Mike Yu | 8ac6340 | 2019-12-02 15:28:38 +0800 | [diff] [blame] | 1081 | EXPECT_EQ(dns1.queries().size(), 2U); |
| 1082 | EXPECT_EQ(dns2.queries().size(), 5U); |
| 1083 | } |
| 1084 | |
chenbruce | fd837fa | 2019-10-29 18:35:36 +0800 | [diff] [blame] | 1085 | TEST_F(ResolverTest, GetAddrInfoFromCustTable_InvalidInput) { |
| 1086 | constexpr char hostnameNoip[] = "noip.example.com."; |
| 1087 | constexpr char hostnameInvalidip[] = "invalidip.example.com."; |
| 1088 | const std::vector<aidl::android::net::ResolverHostsParcel> invalidCustHosts = { |
| 1089 | {"", hostnameNoip}, |
| 1090 | {"wrong IP", hostnameInvalidip}, |
| 1091 | }; |
| 1092 | test::DNSResponder dns; |
| 1093 | StartDns(dns, {}); |
| 1094 | auto resolverParams = DnsResponderClient::GetDefaultResolverParamsParcel(); |
Ken Chen | 0542081 | 2020-04-07 18:58:38 +0000 | [diff] [blame] | 1095 | resolverParams.resolverOptions.hosts = invalidCustHosts; |
chenbruce | fd837fa | 2019-10-29 18:35:36 +0800 | [diff] [blame] | 1096 | ASSERT_TRUE(mDnsClient.resolvService()->setResolverConfiguration(resolverParams).isOk()); |
| 1097 | for (const auto& hostname : {hostnameNoip, hostnameInvalidip}) { |
| 1098 | // The query won't get data from customized table because of invalid customized table |
| 1099 | // and DNSResponder also has no records. hostnameNoip has never registered and |
| 1100 | // hostnameInvalidip has registered but wrong IP. |
| 1101 | const addrinfo hints = {.ai_family = AF_UNSPEC}; |
| 1102 | ScopedAddrinfo result = safe_getaddrinfo(hostname, nullptr, &hints); |
| 1103 | ASSERT_TRUE(result == nullptr); |
| 1104 | EXPECT_EQ(4U, GetNumQueries(dns, hostname)); |
| 1105 | } |
| 1106 | } |
| 1107 | |
| 1108 | TEST_F(ResolverTest, GetAddrInfoFromCustTable) { |
| 1109 | constexpr char hostnameV4[] = "v4only.example.com."; |
| 1110 | constexpr char hostnameV6[] = "v6only.example.com."; |
| 1111 | constexpr char hostnameV4V6[] = "v4v6.example.com."; |
| 1112 | constexpr char custAddrV4[] = "1.2.3.4"; |
| 1113 | constexpr char custAddrV6[] = "::1.2.3.4"; |
| 1114 | constexpr char dnsSvAddrV4[] = "1.2.3.5"; |
| 1115 | constexpr char dnsSvAddrV6[] = "::1.2.3.5"; |
| 1116 | const std::vector<aidl::android::net::ResolverHostsParcel> custHostV4 = { |
| 1117 | {custAddrV4, hostnameV4}, |
| 1118 | }; |
| 1119 | const std::vector<aidl::android::net::ResolverHostsParcel> custHostV6 = { |
| 1120 | {custAddrV6, hostnameV6}, |
| 1121 | }; |
| 1122 | const std::vector<aidl::android::net::ResolverHostsParcel> custHostV4V6 = { |
| 1123 | {custAddrV4, hostnameV4V6}, |
| 1124 | {custAddrV6, hostnameV4V6}, |
| 1125 | }; |
| 1126 | const std::vector<DnsRecord> dnsSvHostV4 = { |
| 1127 | {hostnameV4, ns_type::ns_t_a, dnsSvAddrV4}, |
| 1128 | }; |
| 1129 | const std::vector<DnsRecord> dnsSvHostV6 = { |
| 1130 | {hostnameV6, ns_type::ns_t_aaaa, dnsSvAddrV6}, |
| 1131 | }; |
| 1132 | const std::vector<DnsRecord> dnsSvHostV4V6 = { |
| 1133 | {hostnameV4V6, ns_type::ns_t_a, dnsSvAddrV4}, |
| 1134 | {hostnameV4V6, ns_type::ns_t_aaaa, dnsSvAddrV6}, |
| 1135 | }; |
| 1136 | struct TestConfig { |
| 1137 | const std::string name; |
| 1138 | const std::vector<aidl::android::net::ResolverHostsParcel> customizedHosts; |
| 1139 | const std::vector<DnsRecord> dnsserverHosts; |
| 1140 | const std::vector<std::string> queryResult; |
| 1141 | std::string asParameters() const { |
| 1142 | return StringPrintf("name: %s, customizedHosts: %s, dnsserverHosts: %s", name.c_str(), |
| 1143 | customizedHosts.empty() ? "No" : "Yes", |
| 1144 | dnsserverHosts.empty() ? "No" : "Yes"); |
| 1145 | } |
| 1146 | } testConfigs[]{ |
| 1147 | // clang-format off |
| 1148 | {hostnameV4, {}, {}, {}}, |
| 1149 | {hostnameV4, {}, dnsSvHostV4, {dnsSvAddrV4}}, |
| 1150 | {hostnameV4, custHostV4, {}, {custAddrV4}}, |
| 1151 | {hostnameV4, custHostV4, dnsSvHostV4, {custAddrV4}}, |
| 1152 | {hostnameV6, {}, {}, {}}, |
| 1153 | {hostnameV6, {}, dnsSvHostV6, {dnsSvAddrV6}}, |
| 1154 | {hostnameV6, custHostV6, {}, {custAddrV6}}, |
| 1155 | {hostnameV6, custHostV6, dnsSvHostV6, {custAddrV6}}, |
| 1156 | {hostnameV4V6, {}, {}, {}}, |
| 1157 | {hostnameV4V6, {}, dnsSvHostV4V6, {dnsSvAddrV4, dnsSvAddrV6}}, |
| 1158 | {hostnameV4V6, custHostV4V6, {}, {custAddrV4, custAddrV6}}, |
| 1159 | {hostnameV4V6, custHostV4V6, dnsSvHostV4V6, {custAddrV4, custAddrV6}}, |
| 1160 | // clang-format on |
| 1161 | }; |
| 1162 | |
| 1163 | for (const auto& config : testConfigs) { |
| 1164 | SCOPED_TRACE(config.asParameters()); |
| 1165 | |
| 1166 | test::DNSResponder dns; |
| 1167 | StartDns(dns, config.dnsserverHosts); |
| 1168 | |
| 1169 | auto resolverParams = DnsResponderClient::GetDefaultResolverParamsParcel(); |
Ken Chen | 0542081 | 2020-04-07 18:58:38 +0000 | [diff] [blame] | 1170 | resolverParams.resolverOptions.hosts = config.customizedHosts; |
chenbruce | fd837fa | 2019-10-29 18:35:36 +0800 | [diff] [blame] | 1171 | ASSERT_TRUE(mDnsClient.resolvService()->setResolverConfiguration(resolverParams).isOk()); |
| 1172 | const addrinfo hints = {.ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM}; |
| 1173 | ScopedAddrinfo result = safe_getaddrinfo(config.name.c_str(), nullptr, &hints); |
| 1174 | if (config.customizedHosts.empty() && config.dnsserverHosts.empty()) { |
| 1175 | ASSERT_TRUE(result == nullptr); |
| 1176 | EXPECT_EQ(2U, GetNumQueries(dns, config.name.c_str())); |
| 1177 | } else { |
| 1178 | ASSERT_TRUE(result != nullptr); |
| 1179 | EXPECT_THAT(ToStrings(result), testing::UnorderedElementsAreArray(config.queryResult)); |
| 1180 | EXPECT_EQ(config.customizedHosts.empty() ? 2U : 0U, |
| 1181 | GetNumQueries(dns, config.name.c_str())); |
| 1182 | } |
| 1183 | |
| 1184 | EXPECT_TRUE(mDnsClient.resolvService()->flushNetworkCache(TEST_NETID).isOk()); |
| 1185 | } |
| 1186 | } |
| 1187 | |
| 1188 | TEST_F(ResolverTest, GetAddrInfoFromCustTable_Modify) { |
| 1189 | constexpr char hostnameV4V6[] = "v4v6.example.com."; |
| 1190 | constexpr char custAddrV4[] = "1.2.3.4"; |
| 1191 | constexpr char custAddrV6[] = "::1.2.3.4"; |
| 1192 | constexpr char dnsSvAddrV4[] = "1.2.3.5"; |
| 1193 | constexpr char dnsSvAddrV6[] = "::1.2.3.5"; |
| 1194 | const std::vector<DnsRecord> dnsSvHostV4V6 = { |
| 1195 | {hostnameV4V6, ns_type::ns_t_a, dnsSvAddrV4}, |
| 1196 | {hostnameV4V6, ns_type::ns_t_aaaa, dnsSvAddrV6}, |
| 1197 | }; |
| 1198 | const std::vector<aidl::android::net::ResolverHostsParcel> custHostV4V6 = { |
| 1199 | {custAddrV4, hostnameV4V6}, |
| 1200 | {custAddrV6, hostnameV4V6}, |
| 1201 | }; |
| 1202 | test::DNSResponder dns; |
| 1203 | StartDns(dns, dnsSvHostV4V6); |
| 1204 | auto resolverParams = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 1205 | |
Ken Chen | 0542081 | 2020-04-07 18:58:38 +0000 | [diff] [blame] | 1206 | resolverParams.resolverOptions.hosts = custHostV4V6; |
chenbruce | fd837fa | 2019-10-29 18:35:36 +0800 | [diff] [blame] | 1207 | ASSERT_TRUE(mDnsClient.resolvService()->setResolverConfiguration(resolverParams).isOk()); |
| 1208 | const addrinfo hints = {.ai_family = AF_UNSPEC, .ai_socktype = SOCK_STREAM}; |
| 1209 | ScopedAddrinfo result = safe_getaddrinfo(hostnameV4V6, nullptr, &hints); |
| 1210 | ASSERT_TRUE(result != nullptr); |
| 1211 | EXPECT_THAT(ToStrings(result), testing::UnorderedElementsAreArray({custAddrV4, custAddrV6})); |
| 1212 | EXPECT_EQ(0U, GetNumQueries(dns, hostnameV4V6)); |
| 1213 | |
Ken Chen | 0542081 | 2020-04-07 18:58:38 +0000 | [diff] [blame] | 1214 | resolverParams.resolverOptions.hosts = {}; |
chenbruce | fd837fa | 2019-10-29 18:35:36 +0800 | [diff] [blame] | 1215 | ASSERT_TRUE(mDnsClient.resolvService()->setResolverConfiguration(resolverParams).isOk()); |
| 1216 | result = safe_getaddrinfo(hostnameV4V6, nullptr, &hints); |
| 1217 | ASSERT_TRUE(result != nullptr); |
| 1218 | EXPECT_THAT(ToStrings(result), testing::UnorderedElementsAreArray({dnsSvAddrV4, dnsSvAddrV6})); |
| 1219 | EXPECT_EQ(2U, GetNumQueries(dns, hostnameV4V6)); |
| 1220 | } |
| 1221 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1222 | TEST_F(ResolverTest, EmptySetup) { |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1223 | std::vector<std::string> servers; |
| 1224 | std::vector<std::string> domains; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1225 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, domains)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1226 | std::vector<std::string> res_servers; |
| 1227 | std::vector<std::string> res_domains; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1228 | std::vector<std::string> res_tls_servers; |
Bernie Innocenti | 758005f | 2019-02-19 18:08:36 +0900 | [diff] [blame] | 1229 | res_params res_params; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1230 | std::vector<ResolverStats> res_stats; |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 1231 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1232 | ASSERT_TRUE(DnsResponderClient::GetResolverInfo( |
| 1233 | mDnsClient.resolvService(), TEST_NETID, &res_servers, &res_domains, &res_tls_servers, |
| 1234 | &res_params, &res_stats, &wait_for_pending_req_timeout_count)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1235 | EXPECT_EQ(0U, res_servers.size()); |
| 1236 | EXPECT_EQ(0U, res_domains.size()); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1237 | EXPECT_EQ(0U, res_tls_servers.size()); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 1238 | ASSERT_EQ(static_cast<size_t>(IDnsResolver::RESOLVER_PARAMS_COUNT), kDefaultParams.size()); |
| 1239 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_SAMPLE_VALIDITY], |
| 1240 | res_params.sample_validity); |
| 1241 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_SUCCESS_THRESHOLD], |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 1242 | res_params.success_threshold); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 1243 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_MIN_SAMPLES], res_params.min_samples); |
| 1244 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_MAX_SAMPLES], res_params.max_samples); |
| 1245 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_BASE_TIMEOUT_MSEC], |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1246 | res_params.base_timeout_msec); |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 1247 | EXPECT_EQ(kDefaultParams[IDnsResolver::RESOLVER_PARAMS_RETRY_COUNT], res_params.retry_count); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1248 | } |
| 1249 | |
| 1250 | TEST_F(ResolverTest, SearchPathChange) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1251 | constexpr char listen_addr[] = "127.0.0.13"; |
| 1252 | constexpr char host_name1[] = "test13.domain1.org."; |
| 1253 | constexpr char host_name2[] = "test13.domain2.org."; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1254 | std::vector<std::string> servers = {listen_addr}; |
| 1255 | std::vector<std::string> domains = {"domain1.org"}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1256 | |
| 1257 | const std::vector<DnsRecord> records = { |
| 1258 | {host_name1, ns_type::ns_t_aaaa, "2001:db8::13"}, |
| 1259 | {host_name2, ns_type::ns_t_aaaa, "2001:db8::1:13"}, |
| 1260 | }; |
| 1261 | test::DNSResponder dns(listen_addr); |
| 1262 | StartDns(dns, records); |
| 1263 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, domains)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1264 | |
| 1265 | const addrinfo hints = {.ai_family = AF_INET6}; |
| 1266 | ScopedAddrinfo result = safe_getaddrinfo("test13", nullptr, &hints); |
| 1267 | EXPECT_TRUE(result != nullptr); |
| 1268 | EXPECT_EQ(1U, dns.queries().size()); |
| 1269 | EXPECT_EQ(1U, GetNumQueries(dns, host_name1)); |
| 1270 | EXPECT_EQ("2001:db8::13", ToString(result)); |
| 1271 | |
| 1272 | // Test that changing the domain search path on its own works. |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1273 | domains = {"domain2.org"}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1274 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, domains)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1275 | dns.clearQueries(); |
| 1276 | |
| 1277 | result = safe_getaddrinfo("test13", nullptr, &hints); |
| 1278 | EXPECT_TRUE(result != nullptr); |
| 1279 | EXPECT_EQ(1U, dns.queries().size()); |
| 1280 | EXPECT_EQ(1U, GetNumQueries(dns, host_name2)); |
| 1281 | EXPECT_EQ("2001:db8::1:13", ToString(result)); |
| 1282 | } |
| 1283 | |
Luke Huang | 2dac438 | 2019-06-24 13:28:44 +0800 | [diff] [blame] | 1284 | namespace { |
| 1285 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1286 | std::vector<std::string> getResolverDomains(aidl::android::net::IDnsResolver* dnsResolverService, |
Luke Huang | 2dac438 | 2019-06-24 13:28:44 +0800 | [diff] [blame] | 1287 | unsigned netId) { |
| 1288 | std::vector<std::string> res_servers; |
| 1289 | std::vector<std::string> res_domains; |
| 1290 | std::vector<std::string> res_tls_servers; |
| 1291 | res_params res_params; |
| 1292 | std::vector<ResolverStats> res_stats; |
| 1293 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1294 | DnsResponderClient::GetResolverInfo(dnsResolverService, netId, &res_servers, &res_domains, |
| 1295 | &res_tls_servers, &res_params, &res_stats, |
| 1296 | &wait_for_pending_req_timeout_count); |
Luke Huang | 2dac438 | 2019-06-24 13:28:44 +0800 | [diff] [blame] | 1297 | return res_domains; |
| 1298 | } |
| 1299 | |
| 1300 | } // namespace |
| 1301 | |
| 1302 | TEST_F(ResolverTest, SearchPathPrune) { |
| 1303 | constexpr size_t DUPLICATED_DOMAIN_NUM = 3; |
| 1304 | constexpr char listen_addr[] = "127.0.0.13"; |
| 1305 | constexpr char domian_name1[] = "domain13.org."; |
| 1306 | constexpr char domian_name2[] = "domain14.org."; |
| 1307 | constexpr char host_name1[] = "test13.domain13.org."; |
| 1308 | constexpr char host_name2[] = "test14.domain14.org."; |
| 1309 | std::vector<std::string> servers = {listen_addr}; |
| 1310 | |
| 1311 | std::vector<std::string> testDomains1; |
| 1312 | std::vector<std::string> testDomains2; |
| 1313 | // Domain length should be <= 255 |
| 1314 | // Max number of domains in search path is 6 |
| 1315 | for (size_t i = 0; i < MAXDNSRCH + 1; i++) { |
| 1316 | // Fill up with invalid domain |
| 1317 | testDomains1.push_back(std::string(300, i + '0')); |
| 1318 | // Fill up with valid but duplicated domain |
| 1319 | testDomains2.push_back(StringPrintf("domain%zu.org", i % DUPLICATED_DOMAIN_NUM)); |
| 1320 | } |
| 1321 | |
| 1322 | // Add valid domain used for query. |
| 1323 | testDomains1.push_back(domian_name1); |
| 1324 | |
| 1325 | // Add valid domain twice used for query. |
| 1326 | testDomains2.push_back(domian_name2); |
| 1327 | testDomains2.push_back(domian_name2); |
| 1328 | |
| 1329 | const std::vector<DnsRecord> records = { |
| 1330 | {host_name1, ns_type::ns_t_aaaa, "2001:db8::13"}, |
| 1331 | {host_name2, ns_type::ns_t_aaaa, "2001:db8::1:13"}, |
| 1332 | }; |
| 1333 | test::DNSResponder dns(listen_addr); |
| 1334 | StartDns(dns, records); |
| 1335 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, testDomains1)); |
| 1336 | |
| 1337 | const addrinfo hints = {.ai_family = AF_INET6}; |
| 1338 | ScopedAddrinfo result = safe_getaddrinfo("test13", nullptr, &hints); |
| 1339 | |
| 1340 | EXPECT_TRUE(result != nullptr); |
| 1341 | |
| 1342 | EXPECT_EQ(1U, dns.queries().size()); |
| 1343 | EXPECT_EQ(1U, GetNumQueries(dns, host_name1)); |
| 1344 | EXPECT_EQ("2001:db8::13", ToString(result)); |
| 1345 | |
| 1346 | const auto& res_domains1 = getResolverDomains(mDnsClient.resolvService(), TEST_NETID); |
| 1347 | // Expect 1 valid domain, invalid domains are removed. |
| 1348 | ASSERT_EQ(1U, res_domains1.size()); |
| 1349 | EXPECT_EQ(domian_name1, res_domains1[0]); |
| 1350 | |
| 1351 | dns.clearQueries(); |
| 1352 | |
| 1353 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, testDomains2)); |
| 1354 | |
| 1355 | result = safe_getaddrinfo("test14", nullptr, &hints); |
| 1356 | EXPECT_TRUE(result != nullptr); |
| 1357 | |
| 1358 | // (3 domains * 2 retries) + 1 success query = 7 |
| 1359 | EXPECT_EQ(7U, dns.queries().size()); |
| 1360 | EXPECT_EQ(1U, GetNumQueries(dns, host_name2)); |
| 1361 | EXPECT_EQ("2001:db8::1:13", ToString(result)); |
| 1362 | |
| 1363 | const auto& res_domains2 = getResolverDomains(mDnsClient.resolvService(), TEST_NETID); |
| 1364 | // Expect 4 valid domain, duplicate domains are removed. |
| 1365 | EXPECT_EQ(DUPLICATED_DOMAIN_NUM + 1U, res_domains2.size()); |
| 1366 | EXPECT_THAT( |
| 1367 | std::vector<std::string>({"domain0.org", "domain1.org", "domain2.org", domian_name2}), |
| 1368 | testing::ElementsAreArray(res_domains2)); |
| 1369 | } |
| 1370 | |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1371 | // If we move this function to dns_responder_client, it will complicate the dependency need of |
| 1372 | // dns_tls_frontend.h. |
| 1373 | static void setupTlsServers(const std::vector<std::string>& servers, |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1374 | std::vector<std::unique_ptr<test::DnsTlsFrontend>>* tls) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1375 | constexpr char listen_udp[] = "53"; |
| 1376 | constexpr char listen_tls[] = "853"; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1377 | |
| 1378 | for (const auto& server : servers) { |
| 1379 | auto t = std::make_unique<test::DnsTlsFrontend>(server, listen_tls, server, listen_udp); |
| 1380 | t = std::make_unique<test::DnsTlsFrontend>(server, listen_tls, server, listen_udp); |
| 1381 | t->startServer(); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1382 | tls->push_back(std::move(t)); |
| 1383 | } |
| 1384 | } |
| 1385 | |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1386 | TEST_F(ResolverTest, MaxServerPrune_Binder) { |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1387 | std::vector<std::string> domains; |
| 1388 | std::vector<std::unique_ptr<test::DNSResponder>> dns; |
| 1389 | std::vector<std::unique_ptr<test::DnsTlsFrontend>> tls; |
| 1390 | std::vector<std::string> servers; |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 1391 | std::vector<DnsResponderClient::Mapping> mappings; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1392 | |
| 1393 | for (unsigned i = 0; i < MAXDNSRCH + 1; i++) { |
| 1394 | domains.push_back(StringPrintf("example%u.com", i)); |
| 1395 | } |
Bernie Innocenti | a5c7b7b | 2019-01-17 21:28:24 +0900 | [diff] [blame] | 1396 | ASSERT_NO_FATAL_FAILURE(mDnsClient.SetupMappings(1, domains, &mappings)); |
| 1397 | ASSERT_NO_FATAL_FAILURE(mDnsClient.SetupDNSServers(MAXNS + 1, mappings, &dns, &servers)); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1398 | ASSERT_NO_FATAL_FAILURE(setupTlsServers(servers, &tls)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1399 | |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1400 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, domains, kDefaultParams, |
| 1401 | kDefaultPrivateDnsHostName)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1402 | |
Mike Yu | 383855b | 2019-01-15 17:53:27 +0800 | [diff] [blame] | 1403 | // If the private DNS validation hasn't completed yet before backend DNS servers stop, |
| 1404 | // TLS servers will get stuck in handleOneRequest(), which causes this test stuck in |
| 1405 | // ~DnsTlsFrontend() because the TLS server loop threads can't be terminated. |
| 1406 | // So, wait for private DNS validation done before stopping backend DNS servers. |
| 1407 | for (int i = 0; i < MAXNS; i++) { |
chenbruce | aff8584 | 2019-05-31 15:46:42 +0800 | [diff] [blame] | 1408 | LOG(INFO) << "Waiting for private DNS validation on " << tls[i]->listen_address() << "."; |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1409 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls[i]->listen_address(), true)); |
chenbruce | aff8584 | 2019-05-31 15:46:42 +0800 | [diff] [blame] | 1410 | LOG(INFO) << "private DNS validation on " << tls[i]->listen_address() << " done."; |
Mike Yu | 383855b | 2019-01-15 17:53:27 +0800 | [diff] [blame] | 1411 | } |
| 1412 | |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1413 | std::vector<std::string> res_servers; |
| 1414 | std::vector<std::string> res_domains; |
| 1415 | std::vector<std::string> res_tls_servers; |
Bernie Innocenti | 758005f | 2019-02-19 18:08:36 +0900 | [diff] [blame] | 1416 | res_params res_params; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1417 | std::vector<ResolverStats> res_stats; |
Ken Chen | 92bed61 | 2018-12-22 21:46:55 +0800 | [diff] [blame] | 1418 | int wait_for_pending_req_timeout_count; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1419 | ASSERT_TRUE(DnsResponderClient::GetResolverInfo( |
| 1420 | mDnsClient.resolvService(), TEST_NETID, &res_servers, &res_domains, &res_tls_servers, |
| 1421 | &res_params, &res_stats, &wait_for_pending_req_timeout_count)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1422 | |
| 1423 | // Check the size of the stats and its contents. |
| 1424 | EXPECT_EQ(static_cast<size_t>(MAXNS), res_servers.size()); |
| 1425 | EXPECT_EQ(static_cast<size_t>(MAXNS), res_tls_servers.size()); |
| 1426 | EXPECT_EQ(static_cast<size_t>(MAXDNSRCH), res_domains.size()); |
| 1427 | EXPECT_TRUE(std::equal(servers.begin(), servers.begin() + MAXNS, res_servers.begin())); |
| 1428 | EXPECT_TRUE(std::equal(servers.begin(), servers.begin() + MAXNS, res_tls_servers.begin())); |
| 1429 | EXPECT_TRUE(std::equal(domains.begin(), domains.begin() + MAXDNSRCH, res_domains.begin())); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1430 | } |
| 1431 | |
| 1432 | TEST_F(ResolverTest, ResolverStats) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1433 | constexpr char listen_addr1[] = "127.0.0.4"; |
| 1434 | constexpr char listen_addr2[] = "127.0.0.5"; |
| 1435 | constexpr char listen_addr3[] = "127.0.0.6"; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1436 | |
| 1437 | // Set server 1 timeout. |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 1438 | test::DNSResponder dns1(listen_addr1, "53", static_cast<ns_rcode>(-1)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1439 | dns1.setResponseProbability(0.0); |
| 1440 | ASSERT_TRUE(dns1.startServer()); |
| 1441 | |
| 1442 | // Set server 2 responding server failure. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1443 | test::DNSResponder dns2(listen_addr2); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1444 | dns2.setResponseProbability(0.0); |
| 1445 | ASSERT_TRUE(dns2.startServer()); |
| 1446 | |
| 1447 | // Set server 3 workable. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1448 | test::DNSResponder dns3(listen_addr3); |
| 1449 | dns3.addMapping(kHelloExampleCom, ns_type::ns_t_a, "1.2.3.4"); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1450 | ASSERT_TRUE(dns3.startServer()); |
| 1451 | |
| 1452 | std::vector<std::string> servers = {listen_addr1, listen_addr2, listen_addr3}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1453 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1454 | |
| 1455 | dns3.clearQueries(); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1456 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1457 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1458 | size_t found = GetNumQueries(dns3, kHelloExampleCom); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1459 | EXPECT_LE(1U, found); |
| 1460 | std::string result_str = ToString(result); |
| 1461 | EXPECT_TRUE(result_str == "1.2.3.4") << ", result_str='" << result_str << "'"; |
| 1462 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 1463 | const std::vector<NameserverStats> expectedCleartextDnsStats = { |
| 1464 | NameserverStats(listen_addr1).setTimeouts(1), |
| 1465 | NameserverStats(listen_addr2).setErrors(1), |
| 1466 | NameserverStats(listen_addr3).setSuccesses(1), |
| 1467 | }; |
| 1468 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
Mike Yu | 0a1c53d | 2018-11-26 13:26:21 +0900 | [diff] [blame] | 1469 | } |
| 1470 | |
Mike Yu | 1579183 | 2020-02-11 13:38:48 +0800 | [diff] [blame] | 1471 | TEST_F(ResolverTest, AlwaysUseLatestSetupParamsInLookups) { |
| 1472 | constexpr char listen_addr1[] = "127.0.0.3"; |
| 1473 | constexpr char listen_addr2[] = "255.255.255.255"; |
| 1474 | constexpr char listen_addr3[] = "127.0.0.4"; |
| 1475 | constexpr char hostname[] = "hello"; |
| 1476 | constexpr char fqdn_with_search_domain[] = "hello.domain2.com."; |
| 1477 | |
| 1478 | test::DNSResponder dns1(listen_addr1, test::kDefaultListenService, static_cast<ns_rcode>(-1)); |
| 1479 | dns1.setResponseProbability(0.0); |
| 1480 | ASSERT_TRUE(dns1.startServer()); |
| 1481 | |
| 1482 | test::DNSResponder dns3(listen_addr3); |
| 1483 | StartDns(dns3, {{fqdn_with_search_domain, ns_type::ns_t_a, "1.2.3.4"}}); |
| 1484 | |
| 1485 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 1486 | parcel.tlsServers.clear(); |
| 1487 | parcel.servers = {listen_addr1, listen_addr2}; |
| 1488 | parcel.domains = {"domain1.com", "domain2.com"}; |
| 1489 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 1490 | |
| 1491 | // Expect the things happening in t1: |
| 1492 | // 1. The lookup starts using the first domain for query. It sends queries to the populated |
| 1493 | // nameserver list {listen_addr1, listen_addr2} for the hostname "hello.domain1.com". |
| 1494 | // 2. A different list of nameservers is updated to the resolver. Revision ID is incremented. |
| 1495 | // 3. The query for the hostname times out. The lookup fails to add the timeout record to the |
| 1496 | // the stats because of the unmatched revision ID. |
| 1497 | // 4. The lookup starts using the second domain for query. It sends queries to the populated |
| 1498 | // nameserver list {listen_addr3, listen_addr1, listen_addr2} for another hostname |
| 1499 | // "hello.domain2.com". |
| 1500 | // 5. The lookup gets the answer and updates a success record to the stats. |
| 1501 | std::thread t1([&hostname]() { |
| 1502 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 1503 | ScopedAddrinfo result = safe_getaddrinfo(hostname, nullptr, &hints); |
| 1504 | EXPECT_NE(result.get(), nullptr); |
| 1505 | EXPECT_EQ(ToString(result), "1.2.3.4"); |
| 1506 | }); |
| 1507 | |
| 1508 | // Wait for t1 to start the step 1. |
| 1509 | while (dns1.queries().size() == 0) { |
| 1510 | usleep(1000); |
| 1511 | } |
| 1512 | |
| 1513 | // Update the resolver with three nameservers. This will increment the revision ID. |
| 1514 | parcel.servers = {listen_addr3, listen_addr1, listen_addr2}; |
| 1515 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 1516 | |
| 1517 | t1.join(); |
| 1518 | EXPECT_EQ(0U, GetNumQueriesForType(dns3, ns_type::ns_t_aaaa, fqdn_with_search_domain)); |
| 1519 | EXPECT_EQ(1U, GetNumQueriesForType(dns3, ns_type::ns_t_a, fqdn_with_search_domain)); |
| 1520 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 1521 | const std::vector<NameserverStats> expectedCleartextDnsStats = { |
| 1522 | NameserverStats(listen_addr1), |
| 1523 | NameserverStats(listen_addr2), |
| 1524 | NameserverStats(listen_addr3).setSuccesses(1), |
| 1525 | }; |
| 1526 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
Mike Yu | 1579183 | 2020-02-11 13:38:48 +0800 | [diff] [blame] | 1527 | } |
| 1528 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1529 | // Test what happens if the specified TLS server is nonexistent. |
| 1530 | TEST_F(ResolverTest, GetHostByName_TlsMissing) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1531 | constexpr char listen_addr[] = "127.0.0.3"; |
| 1532 | constexpr char host_name[] = "tlsmissing.example.com."; |
| 1533 | |
| 1534 | test::DNSResponder dns; |
| 1535 | StartDns(dns, {{host_name, ns_type::ns_t_a, "1.2.3.3"}}); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1536 | std::vector<std::string> servers = {listen_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1537 | |
| 1538 | // There's nothing listening on this address, so validation will either fail or |
| 1539 | /// hang. Either way, queries will continue to flow to the DNSResponder. |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1540 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1541 | |
| 1542 | const hostent* result; |
| 1543 | |
| 1544 | result = gethostbyname("tlsmissing"); |
| 1545 | ASSERT_FALSE(result == nullptr); |
| 1546 | EXPECT_EQ("1.2.3.3", ToString(result)); |
| 1547 | |
| 1548 | // Clear TLS bit. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1549 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1550 | } |
| 1551 | |
| 1552 | // Test what happens if the specified TLS server replies with garbage. |
| 1553 | TEST_F(ResolverTest, GetHostByName_TlsBroken) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1554 | constexpr char listen_addr[] = "127.0.0.3"; |
| 1555 | constexpr char host_name1[] = "tlsbroken1.example.com."; |
| 1556 | constexpr char host_name2[] = "tlsbroken2.example.com."; |
| 1557 | const std::vector<DnsRecord> records = { |
| 1558 | {host_name1, ns_type::ns_t_a, "1.2.3.1"}, |
| 1559 | {host_name2, ns_type::ns_t_a, "1.2.3.2"}, |
| 1560 | }; |
| 1561 | |
| 1562 | test::DNSResponder dns; |
| 1563 | StartDns(dns, records); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1564 | std::vector<std::string> servers = {listen_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1565 | |
| 1566 | // Bind the specified private DNS socket but don't respond to any client sockets yet. |
| 1567 | int s = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP); |
| 1568 | ASSERT_TRUE(s >= 0); |
| 1569 | struct sockaddr_in tlsServer = { |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1570 | .sin_family = AF_INET, |
| 1571 | .sin_port = htons(853), |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1572 | }; |
| 1573 | ASSERT_TRUE(inet_pton(AF_INET, listen_addr, &tlsServer.sin_addr)); |
| 1574 | ASSERT_TRUE(enableSockopt(s, SOL_SOCKET, SO_REUSEPORT).ok()); |
| 1575 | ASSERT_TRUE(enableSockopt(s, SOL_SOCKET, SO_REUSEADDR).ok()); |
| 1576 | ASSERT_FALSE(bind(s, reinterpret_cast<struct sockaddr*>(&tlsServer), sizeof(tlsServer))); |
| 1577 | ASSERT_FALSE(listen(s, 1)); |
| 1578 | |
| 1579 | // Trigger TLS validation. |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1580 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1581 | |
| 1582 | struct sockaddr_storage cliaddr; |
| 1583 | socklen_t sin_size = sizeof(cliaddr); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1584 | int new_fd = accept4(s, reinterpret_cast<struct sockaddr*>(&cliaddr), &sin_size, SOCK_CLOEXEC); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1585 | ASSERT_TRUE(new_fd > 0); |
| 1586 | |
| 1587 | // We've received the new file descriptor but not written to it or closed, so the |
| 1588 | // validation is still pending. Queries should still flow correctly because the |
| 1589 | // server is not used until validation succeeds. |
| 1590 | const hostent* result; |
| 1591 | result = gethostbyname("tlsbroken1"); |
| 1592 | ASSERT_FALSE(result == nullptr); |
| 1593 | EXPECT_EQ("1.2.3.1", ToString(result)); |
| 1594 | |
| 1595 | // Now we cause the validation to fail. |
| 1596 | std::string garbage = "definitely not a valid TLS ServerHello"; |
| 1597 | write(new_fd, garbage.data(), garbage.size()); |
| 1598 | close(new_fd); |
| 1599 | |
| 1600 | // Validation failure shouldn't interfere with lookups, because lookups won't be sent |
| 1601 | // to the TLS server unless validation succeeds. |
| 1602 | result = gethostbyname("tlsbroken2"); |
| 1603 | ASSERT_FALSE(result == nullptr); |
| 1604 | EXPECT_EQ("1.2.3.2", ToString(result)); |
| 1605 | |
| 1606 | // Clear TLS bit. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1607 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1608 | close(s); |
| 1609 | } |
| 1610 | |
| 1611 | TEST_F(ResolverTest, GetHostByName_Tls) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1612 | constexpr char listen_addr[] = "127.0.0.3"; |
| 1613 | constexpr char listen_udp[] = "53"; |
| 1614 | constexpr char listen_tls[] = "853"; |
| 1615 | constexpr char host_name1[] = "tls1.example.com."; |
| 1616 | constexpr char host_name2[] = "tls2.example.com."; |
| 1617 | constexpr char host_name3[] = "tls3.example.com."; |
| 1618 | const std::vector<DnsRecord> records = { |
| 1619 | {host_name1, ns_type::ns_t_a, "1.2.3.1"}, |
| 1620 | {host_name2, ns_type::ns_t_a, "1.2.3.2"}, |
| 1621 | {host_name3, ns_type::ns_t_a, "1.2.3.3"}, |
| 1622 | }; |
| 1623 | |
| 1624 | test::DNSResponder dns; |
| 1625 | StartDns(dns, records); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1626 | std::vector<std::string> servers = {listen_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1627 | |
| 1628 | test::DnsTlsFrontend tls(listen_addr, listen_tls, listen_addr, listen_udp); |
| 1629 | ASSERT_TRUE(tls.startServer()); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1630 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1631 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1632 | |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1633 | const hostent* result = gethostbyname("tls1"); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1634 | ASSERT_FALSE(result == nullptr); |
| 1635 | EXPECT_EQ("1.2.3.1", ToString(result)); |
| 1636 | |
| 1637 | // Wait for query to get counted. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1638 | EXPECT_TRUE(tls.waitForQueries(2)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1639 | |
| 1640 | // Stop the TLS server. Since we're in opportunistic mode, queries will |
| 1641 | // fall back to the locally-assigned (clear text) nameservers. |
| 1642 | tls.stopServer(); |
| 1643 | |
| 1644 | dns.clearQueries(); |
| 1645 | result = gethostbyname("tls2"); |
| 1646 | EXPECT_FALSE(result == nullptr); |
| 1647 | EXPECT_EQ("1.2.3.2", ToString(result)); |
| 1648 | const auto queries = dns.queries(); |
| 1649 | EXPECT_EQ(1U, queries.size()); |
waynema | 2925305 | 2019-08-20 11:26:08 +0800 | [diff] [blame] | 1650 | EXPECT_EQ("tls2.example.com.", queries[0].name); |
| 1651 | EXPECT_EQ(ns_t_a, queries[0].type); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1652 | |
| 1653 | // Reset the resolvers without enabling TLS. Queries should still be routed |
| 1654 | // to the UDP endpoint. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1655 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1656 | |
| 1657 | result = gethostbyname("tls3"); |
| 1658 | ASSERT_FALSE(result == nullptr); |
| 1659 | EXPECT_EQ("1.2.3.3", ToString(result)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1660 | } |
| 1661 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1662 | TEST_F(ResolverTest, GetHostByName_TlsFailover) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1663 | constexpr char listen_addr1[] = "127.0.0.3"; |
| 1664 | constexpr char listen_addr2[] = "127.0.0.4"; |
| 1665 | constexpr char listen_udp[] = "53"; |
| 1666 | constexpr char listen_tls[] = "853"; |
| 1667 | constexpr char host_name1[] = "tlsfailover1.example.com."; |
| 1668 | constexpr char host_name2[] = "tlsfailover2.example.com."; |
| 1669 | const std::vector<DnsRecord> records1 = { |
| 1670 | {host_name1, ns_type::ns_t_a, "1.2.3.1"}, |
| 1671 | {host_name2, ns_type::ns_t_a, "1.2.3.2"}, |
| 1672 | }; |
| 1673 | const std::vector<DnsRecord> records2 = { |
| 1674 | {host_name1, ns_type::ns_t_a, "1.2.3.3"}, |
| 1675 | {host_name2, ns_type::ns_t_a, "1.2.3.4"}, |
| 1676 | }; |
| 1677 | |
| 1678 | test::DNSResponder dns1(listen_addr1); |
| 1679 | test::DNSResponder dns2(listen_addr2); |
| 1680 | StartDns(dns1, records1); |
| 1681 | StartDns(dns2, records2); |
| 1682 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1683 | std::vector<std::string> servers = {listen_addr1, listen_addr2}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1684 | |
| 1685 | test::DnsTlsFrontend tls1(listen_addr1, listen_tls, listen_addr1, listen_udp); |
| 1686 | test::DnsTlsFrontend tls2(listen_addr2, listen_tls, listen_addr2, listen_udp); |
| 1687 | ASSERT_TRUE(tls1.startServer()); |
| 1688 | ASSERT_TRUE(tls2.startServer()); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1689 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, |
| 1690 | kDefaultPrivateDnsHostName)); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1691 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls1.listen_address(), true)); |
| 1692 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls2.listen_address(), true)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1693 | |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1694 | const hostent* result = gethostbyname("tlsfailover1"); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1695 | ASSERT_FALSE(result == nullptr); |
| 1696 | EXPECT_EQ("1.2.3.1", ToString(result)); |
| 1697 | |
| 1698 | // Wait for query to get counted. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1699 | EXPECT_TRUE(tls1.waitForQueries(2)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1700 | // No new queries should have reached tls2. |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 1701 | EXPECT_TRUE(tls2.waitForQueries(1)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1702 | |
| 1703 | // Stop tls1. Subsequent queries should attempt to reach tls1, fail, and retry to tls2. |
| 1704 | tls1.stopServer(); |
| 1705 | |
| 1706 | result = gethostbyname("tlsfailover2"); |
| 1707 | EXPECT_EQ("1.2.3.4", ToString(result)); |
| 1708 | |
| 1709 | // Wait for query to get counted. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1710 | EXPECT_TRUE(tls2.waitForQueries(2)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1711 | |
| 1712 | // No additional queries should have reached the insecure servers. |
| 1713 | EXPECT_EQ(2U, dns1.queries().size()); |
| 1714 | EXPECT_EQ(2U, dns2.queries().size()); |
| 1715 | |
| 1716 | // Clear TLS bit. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1717 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1718 | } |
| 1719 | |
| 1720 | TEST_F(ResolverTest, GetHostByName_BadTlsName) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1721 | constexpr char listen_addr[] = "127.0.0.3"; |
| 1722 | constexpr char listen_udp[] = "53"; |
| 1723 | constexpr char listen_tls[] = "853"; |
| 1724 | constexpr char host_name[] = "badtlsname.example.com."; |
| 1725 | |
| 1726 | test::DNSResponder dns; |
| 1727 | StartDns(dns, {{host_name, ns_type::ns_t_a, "1.2.3.1"}}); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1728 | std::vector<std::string> servers = {listen_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1729 | |
| 1730 | test::DnsTlsFrontend tls(listen_addr, listen_tls, listen_addr, listen_udp); |
| 1731 | ASSERT_TRUE(tls.startServer()); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1732 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1733 | kDefaultIncorrectPrivateDnsHostName)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1734 | |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1735 | // The TLS handshake would fail because the name of TLS server doesn't |
| 1736 | // match with TLS server's certificate. |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1737 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), false)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1738 | |
| 1739 | // The query should fail hard, because a name was specified. |
| 1740 | EXPECT_EQ(nullptr, gethostbyname("badtlsname")); |
| 1741 | |
| 1742 | // Clear TLS bit. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1743 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1744 | } |
| 1745 | |
| 1746 | TEST_F(ResolverTest, GetAddrInfo_Tls) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1747 | constexpr char listen_addr[] = "127.0.0.3"; |
| 1748 | constexpr char listen_udp[] = "53"; |
| 1749 | constexpr char listen_tls[] = "853"; |
| 1750 | constexpr char host_name[] = "addrinfotls.example.com."; |
| 1751 | const std::vector<DnsRecord> records = { |
| 1752 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 1753 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 1754 | }; |
| 1755 | |
| 1756 | test::DNSResponder dns; |
| 1757 | StartDns(dns, records); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1758 | std::vector<std::string> servers = {listen_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1759 | |
| 1760 | test::DnsTlsFrontend tls(listen_addr, listen_tls, listen_addr, listen_udp); |
| 1761 | ASSERT_TRUE(tls.startServer()); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1762 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, |
| 1763 | kDefaultPrivateDnsHostName)); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1764 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1765 | |
| 1766 | dns.clearQueries(); |
| 1767 | ScopedAddrinfo result = safe_getaddrinfo("addrinfotls", nullptr, nullptr); |
| 1768 | EXPECT_TRUE(result != nullptr); |
| 1769 | size_t found = GetNumQueries(dns, host_name); |
| 1770 | EXPECT_LE(1U, found); |
| 1771 | // Could be A or AAAA |
| 1772 | std::string result_str = ToString(result); |
| 1773 | EXPECT_TRUE(result_str == "1.2.3.4" || result_str == "::1.2.3.4") |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1774 | << ", result_str='" << result_str << "'"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1775 | // Wait for both A and AAAA queries to get counted. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1776 | EXPECT_TRUE(tls.waitForQueries(3)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1777 | |
| 1778 | // Clear TLS bit. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1779 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1780 | } |
| 1781 | |
| 1782 | TEST_F(ResolverTest, TlsBypass) { |
| 1783 | const char OFF[] = "off"; |
| 1784 | const char OPPORTUNISTIC[] = "opportunistic"; |
| 1785 | const char STRICT[] = "strict"; |
| 1786 | |
| 1787 | const char GETHOSTBYNAME[] = "gethostbyname"; |
| 1788 | const char GETADDRINFO[] = "getaddrinfo"; |
| 1789 | const char GETADDRINFOFORNET[] = "getaddrinfofornet"; |
| 1790 | |
| 1791 | const unsigned BYPASS_NETID = NETID_USE_LOCAL_NAMESERVERS | TEST_NETID; |
| 1792 | |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1793 | const char ADDR4[] = "192.0.2.1"; |
| 1794 | const char ADDR6[] = "2001:db8::1"; |
| 1795 | |
| 1796 | const char cleartext_addr[] = "127.0.0.53"; |
| 1797 | const char cleartext_port[] = "53"; |
| 1798 | const char tls_port[] = "853"; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1799 | const std::vector<std::string> servers = {cleartext_addr}; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1800 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1801 | test::DNSResponder dns(cleartext_addr); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1802 | ASSERT_TRUE(dns.startServer()); |
| 1803 | |
| 1804 | test::DnsTlsFrontend tls(cleartext_addr, tls_port, cleartext_addr, cleartext_port); |
Mike Yu | dd4ac2d | 2019-05-31 16:52:11 +0800 | [diff] [blame] | 1805 | ASSERT_TRUE(tls.startServer()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1806 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1807 | // clang-format off |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1808 | struct TestConfig { |
| 1809 | const std::string mode; |
| 1810 | const bool withWorkingTLS; |
| 1811 | const std::string method; |
| 1812 | |
| 1813 | std::string asHostName() const { |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1814 | return StringPrintf("%s.%s.%s.", mode.c_str(), withWorkingTLS ? "tlsOn" : "tlsOff", |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1815 | method.c_str()); |
| 1816 | } |
| 1817 | } testConfigs[]{ |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1818 | {OFF, true, GETHOSTBYNAME}, |
| 1819 | {OPPORTUNISTIC, true, GETHOSTBYNAME}, |
| 1820 | {STRICT, true, GETHOSTBYNAME}, |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1821 | {OFF, true, GETADDRINFO}, |
| 1822 | {OPPORTUNISTIC, true, GETADDRINFO}, |
| 1823 | {STRICT, true, GETADDRINFO}, |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1824 | {OFF, true, GETADDRINFOFORNET}, |
| 1825 | {OPPORTUNISTIC, true, GETADDRINFOFORNET}, |
| 1826 | {STRICT, true, GETADDRINFOFORNET}, |
Mike Yu | dd4ac2d | 2019-05-31 16:52:11 +0800 | [diff] [blame] | 1827 | {OFF, false, GETHOSTBYNAME}, |
| 1828 | {OPPORTUNISTIC, false, GETHOSTBYNAME}, |
| 1829 | {STRICT, false, GETHOSTBYNAME}, |
| 1830 | {OFF, false, GETADDRINFO}, |
| 1831 | {OPPORTUNISTIC, false, GETADDRINFO}, |
| 1832 | {STRICT, false, GETADDRINFO}, |
| 1833 | {OFF, false, GETADDRINFOFORNET}, |
| 1834 | {OPPORTUNISTIC, false, GETADDRINFOFORNET}, |
| 1835 | {STRICT, false, GETADDRINFOFORNET}, |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1836 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1837 | // clang-format on |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1838 | |
| 1839 | for (const auto& config : testConfigs) { |
| 1840 | const std::string testHostName = config.asHostName(); |
| 1841 | SCOPED_TRACE(testHostName); |
| 1842 | |
| 1843 | // Don't tempt test bugs due to caching. |
| 1844 | const char* host_name = testHostName.c_str(); |
| 1845 | dns.addMapping(host_name, ns_type::ns_t_a, ADDR4); |
| 1846 | dns.addMapping(host_name, ns_type::ns_t_aaaa, ADDR6); |
| 1847 | |
Mike Yu | dd4ac2d | 2019-05-31 16:52:11 +0800 | [diff] [blame] | 1848 | if (config.withWorkingTLS) { |
| 1849 | if (!tls.running()) { |
| 1850 | ASSERT_TRUE(tls.startServer()); |
| 1851 | } |
| 1852 | } else { |
| 1853 | if (tls.running()) { |
| 1854 | ASSERT_TRUE(tls.stopServer()); |
| 1855 | } |
| 1856 | } |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1857 | |
| 1858 | if (config.mode == OFF) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1859 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers, kDefaultSearchDomains, |
| 1860 | kDefaultParams)); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1861 | } else /* OPPORTUNISTIC or STRICT */ { |
| 1862 | const char* tls_hostname = (config.mode == STRICT) ? kDefaultPrivateDnsHostName : ""; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1863 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1864 | kDefaultParams, tls_hostname)); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1865 | |
| 1866 | // Wait for the validation event. If the server is running, the validation should |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1867 | // succeed; otherwise, the validation should fail. |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 1868 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), config.withWorkingTLS)); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 1869 | if (config.withWorkingTLS) { |
| 1870 | EXPECT_TRUE(tls.waitForQueries(1)); |
| 1871 | tls.clearQueries(); |
| 1872 | } |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1873 | } |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1874 | |
| 1875 | const hostent* h_result = nullptr; |
| 1876 | ScopedAddrinfo ai_result; |
| 1877 | |
| 1878 | if (config.method == GETHOSTBYNAME) { |
| 1879 | ASSERT_EQ(0, setNetworkForResolv(BYPASS_NETID)); |
| 1880 | h_result = gethostbyname(host_name); |
| 1881 | |
| 1882 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, host_name)); |
| 1883 | ASSERT_FALSE(h_result == nullptr); |
| 1884 | ASSERT_EQ(4, h_result->h_length); |
| 1885 | ASSERT_FALSE(h_result->h_addr_list[0] == nullptr); |
| 1886 | EXPECT_EQ(ADDR4, ToString(h_result)); |
| 1887 | EXPECT_TRUE(h_result->h_addr_list[1] == nullptr); |
| 1888 | } else if (config.method == GETADDRINFO) { |
| 1889 | ASSERT_EQ(0, setNetworkForResolv(BYPASS_NETID)); |
| 1890 | ai_result = safe_getaddrinfo(host_name, nullptr, nullptr); |
| 1891 | EXPECT_TRUE(ai_result != nullptr); |
| 1892 | |
| 1893 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 1894 | // Could be A or AAAA |
| 1895 | const std::string result_str = ToString(ai_result); |
| 1896 | EXPECT_TRUE(result_str == ADDR4 || result_str == ADDR6) |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1897 | << ", result_str='" << result_str << "'"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1898 | } else if (config.method == GETADDRINFOFORNET) { |
| 1899 | addrinfo* raw_ai_result = nullptr; |
| 1900 | EXPECT_EQ(0, android_getaddrinfofornet(host_name, /*servname=*/nullptr, |
| 1901 | /*hints=*/nullptr, BYPASS_NETID, MARK_UNSET, |
| 1902 | &raw_ai_result)); |
| 1903 | ai_result.reset(raw_ai_result); |
| 1904 | |
| 1905 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 1906 | // Could be A or AAAA |
| 1907 | const std::string result_str = ToString(ai_result); |
| 1908 | EXPECT_TRUE(result_str == ADDR4 || result_str == ADDR6) |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1909 | << ", result_str='" << result_str << "'"; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1910 | } |
| 1911 | |
Mike Yu | dd4ac2d | 2019-05-31 16:52:11 +0800 | [diff] [blame] | 1912 | EXPECT_EQ(0, tls.queries()); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1913 | |
| 1914 | // Clear per-process resolv netid. |
| 1915 | ASSERT_EQ(0, setNetworkForResolv(NETID_UNSET)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1916 | dns.clearQueries(); |
| 1917 | } |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1918 | } |
| 1919 | |
| 1920 | TEST_F(ResolverTest, StrictMode_NoTlsServers) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1921 | constexpr char cleartext_addr[] = "127.0.0.53"; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1922 | const std::vector<std::string> servers = {cleartext_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1923 | constexpr char host_name[] = "strictmode.notlsips.example.com."; |
| 1924 | const std::vector<DnsRecord> records = { |
| 1925 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 1926 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 1927 | }; |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1928 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 1929 | test::DNSResponder dns(cleartext_addr); |
| 1930 | StartDns(dns, records); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1931 | |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 1932 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, |
| 1933 | kDefaultIncorrectPrivateDnsHostName)); |
Ken Chen | b9fa206 | 2018-11-13 21:51:13 +0800 | [diff] [blame] | 1934 | |
| 1935 | addrinfo* ai_result = nullptr; |
| 1936 | EXPECT_NE(0, getaddrinfo(host_name, nullptr, nullptr, &ai_result)); |
| 1937 | EXPECT_EQ(0U, GetNumQueries(dns, host_name)); |
| 1938 | } |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1939 | |
| 1940 | namespace { |
| 1941 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 1942 | int getAsyncResponse(int fd, int* rcode, uint8_t* buf, int bufLen) { |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1943 | struct pollfd wait_fd[1]; |
| 1944 | wait_fd[0].fd = fd; |
| 1945 | wait_fd[0].events = POLLIN; |
| 1946 | short revents; |
| 1947 | int ret; |
| 1948 | |
| 1949 | ret = poll(wait_fd, 1, -1); |
| 1950 | revents = wait_fd[0].revents; |
| 1951 | if (revents & POLLIN) { |
| 1952 | int n = resNetworkResult(fd, rcode, buf, bufLen); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 1953 | // Verify that resNetworkResult() closed the fd |
| 1954 | char dummy; |
| 1955 | EXPECT_EQ(-1, read(fd, &dummy, sizeof dummy)); |
| 1956 | EXPECT_EQ(EBADF, errno); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1957 | return n; |
| 1958 | } |
| 1959 | return -1; |
| 1960 | } |
| 1961 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 1962 | std::string toString(uint8_t* buf, int bufLen, int ipType) { |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1963 | ns_msg handle; |
| 1964 | int ancount, n = 0; |
| 1965 | ns_rr rr; |
| 1966 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1967 | if (ns_initparse((const uint8_t*)buf, bufLen, &handle) >= 0) { |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1968 | ancount = ns_msg_count(handle, ns_s_an); |
| 1969 | if (ns_parserr(&handle, ns_s_an, n, &rr) == 0) { |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 1970 | const uint8_t* rdata = ns_rr_rdata(rr); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1971 | char buffer[INET6_ADDRSTRLEN]; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1972 | if (inet_ntop(ipType, (const char*)rdata, buffer, sizeof(buffer))) { |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1973 | return buffer; |
| 1974 | } |
| 1975 | } |
| 1976 | } |
| 1977 | return ""; |
| 1978 | } |
| 1979 | |
| 1980 | int dns_open_proxy() { |
| 1981 | int s = socket(AF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 0); |
| 1982 | if (s == -1) { |
| 1983 | return -1; |
| 1984 | } |
| 1985 | const int one = 1; |
| 1986 | setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one)); |
| 1987 | |
| 1988 | static const struct sockaddr_un proxy_addr = { |
| 1989 | .sun_family = AF_UNIX, |
| 1990 | .sun_path = "/dev/socket/dnsproxyd", |
| 1991 | }; |
| 1992 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 1993 | if (TEMP_FAILURE_RETRY(connect(s, (const struct sockaddr*)&proxy_addr, sizeof(proxy_addr))) != |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 1994 | 0) { |
| 1995 | close(s); |
| 1996 | return -1; |
| 1997 | } |
| 1998 | |
| 1999 | return s; |
| 2000 | } |
| 2001 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2002 | void expectAnswersValid(int fd, int ipType, const std::string& expectedAnswer) { |
| 2003 | int rcode = -1; |
| 2004 | uint8_t buf[MAXPACKET] = {}; |
| 2005 | |
| 2006 | int res = getAsyncResponse(fd, &rcode, buf, MAXPACKET); |
| 2007 | EXPECT_GT(res, 0); |
| 2008 | EXPECT_EQ(expectedAnswer, toString(buf, res, ipType)); |
| 2009 | } |
| 2010 | |
| 2011 | void expectAnswersNotValid(int fd, int expectedErrno) { |
| 2012 | int rcode = -1; |
| 2013 | uint8_t buf[MAXPACKET] = {}; |
| 2014 | |
| 2015 | int res = getAsyncResponse(fd, &rcode, buf, MAXPACKET); |
| 2016 | EXPECT_EQ(expectedErrno, res); |
| 2017 | } |
| 2018 | |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2019 | } // namespace |
| 2020 | |
| 2021 | TEST_F(ResolverTest, Async_NormalQueryV4V6) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2022 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2023 | constexpr char host_name[] = "howdy.example.com."; |
| 2024 | const std::vector<DnsRecord> records = { |
| 2025 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2026 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2027 | }; |
| 2028 | |
| 2029 | test::DNSResponder dns(listen_addr); |
| 2030 | StartDns(dns, records); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2031 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2032 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2033 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2034 | int fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2035 | int fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2036 | EXPECT_TRUE(fd1 != -1); |
| 2037 | EXPECT_TRUE(fd2 != -1); |
| 2038 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2039 | uint8_t buf[MAXPACKET] = {}; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2040 | int rcode; |
| 2041 | int res = getAsyncResponse(fd2, &rcode, buf, MAXPACKET); |
| 2042 | EXPECT_GT(res, 0); |
| 2043 | EXPECT_EQ("::1.2.3.4", toString(buf, res, AF_INET6)); |
| 2044 | |
| 2045 | res = getAsyncResponse(fd1, &rcode, buf, MAXPACKET); |
| 2046 | EXPECT_GT(res, 0); |
| 2047 | EXPECT_EQ("1.2.3.4", toString(buf, res, AF_INET)); |
| 2048 | |
| 2049 | EXPECT_EQ(2U, GetNumQueries(dns, host_name)); |
| 2050 | |
| 2051 | // Re-query verify cache works |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2052 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2053 | fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2054 | |
| 2055 | EXPECT_TRUE(fd1 != -1); |
| 2056 | EXPECT_TRUE(fd2 != -1); |
| 2057 | |
| 2058 | res = getAsyncResponse(fd2, &rcode, buf, MAXPACKET); |
| 2059 | EXPECT_GT(res, 0); |
| 2060 | EXPECT_EQ("::1.2.3.4", toString(buf, res, AF_INET6)); |
| 2061 | |
| 2062 | res = getAsyncResponse(fd1, &rcode, buf, MAXPACKET); |
| 2063 | EXPECT_GT(res, 0); |
| 2064 | EXPECT_EQ("1.2.3.4", toString(buf, res, AF_INET)); |
| 2065 | |
| 2066 | EXPECT_EQ(2U, GetNumQueries(dns, host_name)); |
| 2067 | } |
| 2068 | |
| 2069 | TEST_F(ResolverTest, Async_BadQuery) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2070 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2071 | constexpr char host_name[] = "howdy.example.com."; |
| 2072 | const std::vector<DnsRecord> records = { |
| 2073 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2074 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2075 | }; |
| 2076 | |
| 2077 | test::DNSResponder dns(listen_addr); |
| 2078 | StartDns(dns, records); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2079 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2080 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2081 | |
| 2082 | static struct { |
| 2083 | int fd; |
| 2084 | const char* dname; |
| 2085 | const int queryType; |
| 2086 | const int expectRcode; |
| 2087 | } kTestData[] = { |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2088 | {-1, "", ns_t_aaaa, 0}, |
| 2089 | {-1, "as65ass46", ns_t_aaaa, 0}, |
| 2090 | {-1, "454564564564", ns_t_aaaa, 0}, |
| 2091 | {-1, "h645235", ns_t_a, 0}, |
| 2092 | {-1, "www.google.com", ns_t_a, 0}, |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2093 | }; |
| 2094 | |
| 2095 | for (auto& td : kTestData) { |
| 2096 | SCOPED_TRACE(td.dname); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2097 | td.fd = resNetworkQuery(TEST_NETID, td.dname, ns_c_in, td.queryType, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2098 | EXPECT_TRUE(td.fd != -1); |
| 2099 | } |
| 2100 | |
| 2101 | // dns_responder return empty resp(packet only contains query part) with no error currently |
| 2102 | for (const auto& td : kTestData) { |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2103 | uint8_t buf[MAXPACKET] = {}; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2104 | int rcode; |
| 2105 | SCOPED_TRACE(td.dname); |
| 2106 | int res = getAsyncResponse(td.fd, &rcode, buf, MAXPACKET); |
| 2107 | EXPECT_GT(res, 0); |
| 2108 | EXPECT_EQ(rcode, td.expectRcode); |
| 2109 | } |
| 2110 | } |
| 2111 | |
| 2112 | TEST_F(ResolverTest, Async_EmptyAnswer) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2113 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2114 | constexpr char host_name[] = "howdy.example.com."; |
| 2115 | const std::vector<DnsRecord> records = { |
| 2116 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2117 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2118 | }; |
| 2119 | |
| 2120 | test::DNSResponder dns(listen_addr); |
| 2121 | StartDns(dns, records); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2122 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2123 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2124 | |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2125 | // TODO: Disable retry to make this test explicit. |
| 2126 | auto& cv = dns.getCv(); |
| 2127 | auto& cvMutex = dns.getCvMutex(); |
| 2128 | int fd1; |
| 2129 | // Wait on the condition variable to ensure that the DNS server has handled our first query. |
| 2130 | { |
| 2131 | std::unique_lock lk(cvMutex); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2132 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2133 | EXPECT_TRUE(fd1 != -1); |
| 2134 | EXPECT_EQ(std::cv_status::no_timeout, cv.wait_for(lk, std::chrono::seconds(1))); |
| 2135 | } |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2136 | |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2137 | dns.setResponseProbability(0.0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2138 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2139 | int fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2140 | EXPECT_TRUE(fd2 != -1); |
| 2141 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2142 | int fd3 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2143 | EXPECT_TRUE(fd3 != -1); |
| 2144 | |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2145 | uint8_t buf[MAXPACKET] = {}; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2146 | int rcode; |
| 2147 | |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2148 | // expect no response |
| 2149 | int res = getAsyncResponse(fd3, &rcode, buf, MAXPACKET); |
| 2150 | EXPECT_EQ(-ETIMEDOUT, res); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2151 | |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2152 | // expect no response |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2153 | memset(buf, 0, MAXPACKET); |
Luke Huang | 9c264bb | 2018-12-18 16:44:41 +0800 | [diff] [blame] | 2154 | res = getAsyncResponse(fd2, &rcode, buf, MAXPACKET); |
| 2155 | EXPECT_EQ(-ETIMEDOUT, res); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2156 | |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2157 | dns.setResponseProbability(1.0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2158 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2159 | int fd4 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2160 | EXPECT_TRUE(fd4 != -1); |
| 2161 | |
| 2162 | memset(buf, 0, MAXPACKET); |
| 2163 | res = getAsyncResponse(fd4, &rcode, buf, MAXPACKET); |
| 2164 | EXPECT_GT(res, 0); |
| 2165 | EXPECT_EQ("1.2.3.4", toString(buf, res, AF_INET)); |
| 2166 | |
| 2167 | memset(buf, 0, MAXPACKET); |
| 2168 | res = getAsyncResponse(fd1, &rcode, buf, MAXPACKET); |
| 2169 | EXPECT_GT(res, 0); |
| 2170 | EXPECT_EQ("::1.2.3.4", toString(buf, res, AF_INET6)); |
| 2171 | } |
| 2172 | |
| 2173 | TEST_F(ResolverTest, Async_MalformedQuery) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2174 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2175 | constexpr char host_name[] = "howdy.example.com."; |
| 2176 | const std::vector<DnsRecord> records = { |
| 2177 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2178 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2179 | }; |
| 2180 | |
| 2181 | test::DNSResponder dns(listen_addr); |
| 2182 | StartDns(dns, records); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2183 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2184 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2185 | |
| 2186 | int fd = dns_open_proxy(); |
| 2187 | EXPECT_TRUE(fd > 0); |
| 2188 | |
| 2189 | const std::string badMsg = "16-52512#"; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2190 | static const struct { |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2191 | const std::string cmd; |
| 2192 | const int expectErr; |
| 2193 | } kTestData[] = { |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2194 | // Too few arguments |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2195 | {"resnsend " + badMsg + '\0', -EINVAL}, |
| 2196 | // Bad netId |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2197 | {"resnsend badnetId 0 " + badMsg + '\0', -EINVAL}, |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2198 | // Bad raw data |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2199 | {"resnsend " + std::to_string(TEST_NETID) + " 0 " + badMsg + '\0', -EILSEQ}, |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2200 | }; |
| 2201 | |
| 2202 | for (unsigned int i = 0; i < std::size(kTestData); i++) { |
| 2203 | auto& td = kTestData[i]; |
| 2204 | SCOPED_TRACE(td.cmd); |
| 2205 | ssize_t rc = TEMP_FAILURE_RETRY(write(fd, td.cmd.c_str(), td.cmd.size())); |
| 2206 | EXPECT_EQ(rc, static_cast<ssize_t>(td.cmd.size())); |
| 2207 | |
| 2208 | int32_t tmp; |
| 2209 | rc = TEMP_FAILURE_RETRY(read(fd, &tmp, sizeof(tmp))); |
| 2210 | EXPECT_TRUE(rc > 0); |
| 2211 | EXPECT_EQ(static_cast<int>(ntohl(tmp)), td.expectErr); |
| 2212 | } |
| 2213 | // Normal query with answer buffer |
| 2214 | // This is raw data of query "howdy.example.com" type 1 class 1 |
| 2215 | std::string query = "81sBAAABAAAAAAAABWhvd2R5B2V4YW1wbGUDY29tAAABAAE="; |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2216 | std::string cmd = "resnsend " + std::to_string(TEST_NETID) + " 0 " + query + '\0'; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2217 | ssize_t rc = TEMP_FAILURE_RETRY(write(fd, cmd.c_str(), cmd.size())); |
| 2218 | EXPECT_EQ(rc, static_cast<ssize_t>(cmd.size())); |
| 2219 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2220 | uint8_t smallBuf[1] = {}; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2221 | int rcode; |
| 2222 | rc = getAsyncResponse(fd, &rcode, smallBuf, 1); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2223 | EXPECT_EQ(-EMSGSIZE, rc); |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2224 | |
| 2225 | // Do the normal test with large buffer again |
| 2226 | fd = dns_open_proxy(); |
| 2227 | EXPECT_TRUE(fd > 0); |
| 2228 | rc = TEMP_FAILURE_RETRY(write(fd, cmd.c_str(), cmd.size())); |
| 2229 | EXPECT_EQ(rc, static_cast<ssize_t>(cmd.size())); |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2230 | uint8_t buf[MAXPACKET] = {}; |
Luke Huang | 94b10b9 | 2018-11-21 20:13:38 +0800 | [diff] [blame] | 2231 | rc = getAsyncResponse(fd, &rcode, buf, MAXPACKET); |
| 2232 | EXPECT_EQ("1.2.3.4", toString(buf, rc, AF_INET)); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2233 | } |
| 2234 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2235 | TEST_F(ResolverTest, Async_CacheFlags) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2236 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2237 | constexpr char host_name[] = "howdy.example.com."; |
Luke Huang | 40f5f49 | 2019-05-09 19:37:35 +0800 | [diff] [blame] | 2238 | constexpr char another_host_name[] = "howdy.example2.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2239 | const std::vector<DnsRecord> records = { |
| 2240 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2241 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
Luke Huang | 40f5f49 | 2019-05-09 19:37:35 +0800 | [diff] [blame] | 2242 | {another_host_name, ns_type::ns_t_a, "1.2.3.5"}, |
| 2243 | {another_host_name, ns_type::ns_t_aaaa, "::1.2.3.5"}, |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2244 | }; |
| 2245 | |
| 2246 | test::DNSResponder dns(listen_addr); |
| 2247 | StartDns(dns, records); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2248 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2249 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2250 | |
| 2251 | // ANDROID_RESOLV_NO_CACHE_STORE |
| 2252 | int fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2253 | ANDROID_RESOLV_NO_CACHE_STORE); |
| 2254 | EXPECT_TRUE(fd1 != -1); |
| 2255 | int fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2256 | ANDROID_RESOLV_NO_CACHE_STORE); |
| 2257 | EXPECT_TRUE(fd2 != -1); |
| 2258 | int fd3 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2259 | ANDROID_RESOLV_NO_CACHE_STORE); |
| 2260 | EXPECT_TRUE(fd3 != -1); |
| 2261 | |
| 2262 | expectAnswersValid(fd3, AF_INET, "1.2.3.4"); |
| 2263 | expectAnswersValid(fd2, AF_INET, "1.2.3.4"); |
| 2264 | expectAnswersValid(fd1, AF_INET, "1.2.3.4"); |
| 2265 | |
| 2266 | // No cache exists, expect 3 queries |
| 2267 | EXPECT_EQ(3U, GetNumQueries(dns, host_name)); |
| 2268 | |
| 2269 | // Re-query and cache |
| 2270 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2271 | |
| 2272 | EXPECT_TRUE(fd1 != -1); |
| 2273 | |
| 2274 | expectAnswersValid(fd1, AF_INET, "1.2.3.4"); |
| 2275 | |
| 2276 | // Now we have cache, expect 4 queries |
| 2277 | EXPECT_EQ(4U, GetNumQueries(dns, host_name)); |
| 2278 | |
| 2279 | // ANDROID_RESOLV_NO_CACHE_LOOKUP |
| 2280 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2281 | ANDROID_RESOLV_NO_CACHE_LOOKUP); |
| 2282 | fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2283 | ANDROID_RESOLV_NO_CACHE_LOOKUP); |
| 2284 | |
| 2285 | EXPECT_TRUE(fd1 != -1); |
| 2286 | EXPECT_TRUE(fd2 != -1); |
| 2287 | |
| 2288 | expectAnswersValid(fd2, AF_INET, "1.2.3.4"); |
| 2289 | expectAnswersValid(fd1, AF_INET, "1.2.3.4"); |
| 2290 | |
| 2291 | // Skip cache, expect 6 queries |
| 2292 | EXPECT_EQ(6U, GetNumQueries(dns, host_name)); |
| 2293 | |
| 2294 | // Re-query verify cache works |
| 2295 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2296 | ANDROID_RESOLV_NO_CACHE_STORE); |
| 2297 | EXPECT_TRUE(fd1 != -1); |
| 2298 | expectAnswersValid(fd1, AF_INET, "1.2.3.4"); |
| 2299 | |
| 2300 | // Cache hits, expect still 6 queries |
| 2301 | EXPECT_EQ(6U, GetNumQueries(dns, host_name)); |
Luke Huang | a1d7418 | 2019-03-19 17:30:36 +0800 | [diff] [blame] | 2302 | |
| 2303 | // Start to verify if ANDROID_RESOLV_NO_CACHE_LOOKUP does write response into cache |
| 2304 | dns.clearQueries(); |
| 2305 | |
| 2306 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, |
| 2307 | ANDROID_RESOLV_NO_CACHE_LOOKUP); |
| 2308 | fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, |
| 2309 | ANDROID_RESOLV_NO_CACHE_LOOKUP); |
| 2310 | |
| 2311 | EXPECT_TRUE(fd1 != -1); |
| 2312 | EXPECT_TRUE(fd2 != -1); |
| 2313 | |
| 2314 | expectAnswersValid(fd2, AF_INET6, "::1.2.3.4"); |
| 2315 | expectAnswersValid(fd1, AF_INET6, "::1.2.3.4"); |
| 2316 | |
| 2317 | // Skip cache, expect 2 queries |
| 2318 | EXPECT_EQ(2U, GetNumQueries(dns, host_name)); |
| 2319 | |
| 2320 | // Re-query without flags |
| 2321 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
| 2322 | fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
| 2323 | |
| 2324 | EXPECT_TRUE(fd1 != -1); |
| 2325 | EXPECT_TRUE(fd2 != -1); |
| 2326 | |
| 2327 | expectAnswersValid(fd2, AF_INET6, "::1.2.3.4"); |
| 2328 | expectAnswersValid(fd1, AF_INET6, "::1.2.3.4"); |
| 2329 | |
| 2330 | // Cache hits, expect still 2 queries |
| 2331 | EXPECT_EQ(2U, GetNumQueries(dns, host_name)); |
Luke Huang | 40f5f49 | 2019-05-09 19:37:35 +0800 | [diff] [blame] | 2332 | |
| 2333 | // Test both ANDROID_RESOLV_NO_CACHE_STORE and ANDROID_RESOLV_NO_CACHE_LOOKUP are set |
| 2334 | dns.clearQueries(); |
| 2335 | |
| 2336 | // Make sure that the cache of "howdy.example2.com" exists. |
| 2337 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example2.com", ns_c_in, ns_t_aaaa, 0); |
| 2338 | EXPECT_TRUE(fd1 != -1); |
| 2339 | expectAnswersValid(fd1, AF_INET6, "::1.2.3.5"); |
| 2340 | EXPECT_EQ(1U, GetNumQueries(dns, another_host_name)); |
| 2341 | |
| 2342 | // Re-query with testFlags |
| 2343 | const int testFlag = ANDROID_RESOLV_NO_CACHE_STORE | ANDROID_RESOLV_NO_CACHE_LOOKUP; |
| 2344 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example2.com", ns_c_in, ns_t_aaaa, testFlag); |
| 2345 | EXPECT_TRUE(fd1 != -1); |
| 2346 | expectAnswersValid(fd1, AF_INET6, "::1.2.3.5"); |
| 2347 | // Expect cache lookup is skipped. |
| 2348 | EXPECT_EQ(2U, GetNumQueries(dns, another_host_name)); |
| 2349 | |
| 2350 | // Do another query with testFlags |
| 2351 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example2.com", ns_c_in, ns_t_a, testFlag); |
| 2352 | EXPECT_TRUE(fd1 != -1); |
| 2353 | expectAnswersValid(fd1, AF_INET, "1.2.3.5"); |
| 2354 | // Expect cache lookup is skipped. |
| 2355 | EXPECT_EQ(3U, GetNumQueries(dns, another_host_name)); |
| 2356 | |
| 2357 | // Re-query with no flags |
| 2358 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example2.com", ns_c_in, ns_t_a, 0); |
| 2359 | EXPECT_TRUE(fd1 != -1); |
| 2360 | expectAnswersValid(fd1, AF_INET, "1.2.3.5"); |
| 2361 | // Expect no cache hit because cache storing is also skipped in previous query. |
| 2362 | EXPECT_EQ(4U, GetNumQueries(dns, another_host_name)); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2363 | } |
| 2364 | |
Luke Huang | 08b13d2 | 2020-02-05 14:46:21 +0800 | [diff] [blame] | 2365 | TEST_F(ResolverTest, Async_NoCacheStoreFlagDoesNotRefreshStaleCacheEntry) { |
| 2366 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2367 | constexpr char host_name[] = "howdy.example.com."; |
| 2368 | const std::vector<DnsRecord> records = { |
| 2369 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2370 | }; |
| 2371 | |
| 2372 | test::DNSResponder dns(listen_addr); |
| 2373 | StartDns(dns, records); |
| 2374 | std::vector<std::string> servers = {listen_addr}; |
| 2375 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
| 2376 | |
| 2377 | const unsigned SHORT_TTL_SEC = 1; |
| 2378 | dns.setTtl(SHORT_TTL_SEC); |
| 2379 | |
| 2380 | // Refer to b/148842821 for the purpose of below test steps. |
| 2381 | // Basically, this test is used to ensure stale cache case is handled |
| 2382 | // correctly with ANDROID_RESOLV_NO_CACHE_STORE. |
| 2383 | int fd = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2384 | EXPECT_TRUE(fd != -1); |
| 2385 | expectAnswersValid(fd, AF_INET, "1.2.3.4"); |
| 2386 | |
| 2387 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| 2388 | dns.clearQueries(); |
| 2389 | |
| 2390 | // Wait until cache expired |
| 2391 | sleep(SHORT_TTL_SEC + 0.5); |
| 2392 | |
| 2393 | // Now request the same hostname again. |
| 2394 | // We should see a new DNS query because the entry in cache has become stale. |
| 2395 | // Due to ANDROID_RESOLV_NO_CACHE_STORE, this query must *not* refresh that stale entry. |
| 2396 | fd = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2397 | ANDROID_RESOLV_NO_CACHE_STORE); |
| 2398 | EXPECT_TRUE(fd != -1); |
| 2399 | expectAnswersValid(fd, AF_INET, "1.2.3.4"); |
| 2400 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| 2401 | dns.clearQueries(); |
| 2402 | |
| 2403 | // If the cache is still stale, we expect to see one more DNS query |
| 2404 | // (this time the cache will be refreshed, but we're not checking for it). |
| 2405 | fd = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2406 | EXPECT_TRUE(fd != -1); |
| 2407 | expectAnswersValid(fd, AF_INET, "1.2.3.4"); |
| 2408 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| 2409 | } |
| 2410 | |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2411 | TEST_F(ResolverTest, Async_NoRetryFlag) { |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2412 | constexpr char listen_addr0[] = "127.0.0.4"; |
| 2413 | constexpr char listen_addr1[] = "127.0.0.6"; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2414 | constexpr char host_name[] = "howdy.example.com."; |
| 2415 | const std::vector<DnsRecord> records = { |
| 2416 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2417 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2418 | }; |
| 2419 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2420 | test::DNSResponder dns0(listen_addr0); |
| 2421 | test::DNSResponder dns1(listen_addr1); |
| 2422 | StartDns(dns0, records); |
| 2423 | StartDns(dns1, records); |
| 2424 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr0, listen_addr1})); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2425 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2426 | dns0.clearQueries(); |
| 2427 | dns1.clearQueries(); |
| 2428 | |
| 2429 | dns0.setResponseProbability(0.0); |
| 2430 | dns1.setResponseProbability(0.0); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2431 | |
| 2432 | int fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, |
| 2433 | ANDROID_RESOLV_NO_RETRY); |
| 2434 | EXPECT_TRUE(fd1 != -1); |
| 2435 | |
| 2436 | int fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, |
| 2437 | ANDROID_RESOLV_NO_RETRY); |
| 2438 | EXPECT_TRUE(fd2 != -1); |
| 2439 | |
| 2440 | // expect no response |
| 2441 | expectAnswersNotValid(fd1, -ETIMEDOUT); |
| 2442 | expectAnswersNotValid(fd2, -ETIMEDOUT); |
| 2443 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2444 | // No retry case, expect total 2 queries. The server is selected randomly. |
| 2445 | EXPECT_EQ(2U, GetNumQueries(dns0, host_name) + GetNumQueries(dns1, host_name)); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2446 | |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2447 | dns0.clearQueries(); |
| 2448 | dns1.clearQueries(); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2449 | |
| 2450 | fd1 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_a, 0); |
| 2451 | EXPECT_TRUE(fd1 != -1); |
| 2452 | |
| 2453 | fd2 = resNetworkQuery(TEST_NETID, "howdy.example.com", ns_c_in, ns_t_aaaa, 0); |
| 2454 | EXPECT_TRUE(fd2 != -1); |
| 2455 | |
| 2456 | // expect no response |
| 2457 | expectAnswersNotValid(fd1, -ETIMEDOUT); |
| 2458 | expectAnswersNotValid(fd2, -ETIMEDOUT); |
| 2459 | |
| 2460 | // Retry case, expect 4 queries |
Luke Huang | 70931aa | 2019-01-31 11:57:41 +0800 | [diff] [blame] | 2461 | EXPECT_EQ(4U, GetNumQueries(dns0, host_name)); |
| 2462 | EXPECT_EQ(4U, GetNumQueries(dns1, host_name)); |
| 2463 | } |
| 2464 | |
| 2465 | TEST_F(ResolverTest, Async_VerifyQueryID) { |
| 2466 | constexpr char listen_addr[] = "127.0.0.4"; |
| 2467 | constexpr char host_name[] = "howdy.example.com."; |
| 2468 | const std::vector<DnsRecord> records = { |
| 2469 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2470 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 2471 | }; |
| 2472 | |
| 2473 | test::DNSResponder dns(listen_addr); |
| 2474 | StartDns(dns, records); |
| 2475 | std::vector<std::string> servers = {listen_addr}; |
| 2476 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
| 2477 | |
| 2478 | const uint8_t queryBuf1[] = { |
| 2479 | /* Header */ |
| 2480 | 0x55, 0x66, /* Transaction ID */ |
| 2481 | 0x01, 0x00, /* Flags */ |
| 2482 | 0x00, 0x01, /* Questions */ |
| 2483 | 0x00, 0x00, /* Answer RRs */ |
| 2484 | 0x00, 0x00, /* Authority RRs */ |
| 2485 | 0x00, 0x00, /* Additional RRs */ |
| 2486 | /* Queries */ |
| 2487 | 0x05, 0x68, 0x6f, 0x77, 0x64, 0x79, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, |
| 2488 | 0x03, 0x63, 0x6f, 0x6d, 0x00, /* Name */ |
| 2489 | 0x00, 0x01, /* Type */ |
| 2490 | 0x00, 0x01 /* Class */ |
| 2491 | }; |
| 2492 | |
| 2493 | int fd = resNetworkSend(TEST_NETID, queryBuf1, sizeof(queryBuf1), 0); |
| 2494 | EXPECT_TRUE(fd != -1); |
| 2495 | |
| 2496 | uint8_t buf[MAXPACKET] = {}; |
| 2497 | int rcode; |
| 2498 | |
| 2499 | int res = getAsyncResponse(fd, &rcode, buf, MAXPACKET); |
| 2500 | EXPECT_GT(res, 0); |
| 2501 | EXPECT_EQ("1.2.3.4", toString(buf, res, AF_INET)); |
| 2502 | |
| 2503 | auto hp = reinterpret_cast<HEADER*>(buf); |
| 2504 | EXPECT_EQ(21862U, htons(hp->id)); |
| 2505 | |
| 2506 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| 2507 | |
| 2508 | const uint8_t queryBuf2[] = { |
| 2509 | /* Header */ |
| 2510 | 0x00, 0x53, /* Transaction ID */ |
| 2511 | 0x01, 0x00, /* Flags */ |
| 2512 | 0x00, 0x01, /* Questions */ |
| 2513 | 0x00, 0x00, /* Answer RRs */ |
| 2514 | 0x00, 0x00, /* Authority RRs */ |
| 2515 | 0x00, 0x00, /* Additional RRs */ |
| 2516 | /* Queries */ |
| 2517 | 0x05, 0x68, 0x6f, 0x77, 0x64, 0x79, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, |
| 2518 | 0x03, 0x63, 0x6f, 0x6d, 0x00, /* Name */ |
| 2519 | 0x00, 0x01, /* Type */ |
| 2520 | 0x00, 0x01 /* Class */ |
| 2521 | }; |
| 2522 | |
| 2523 | // Re-query verify cache works and query id is correct |
| 2524 | fd = resNetworkSend(TEST_NETID, queryBuf2, sizeof(queryBuf2), 0); |
| 2525 | |
| 2526 | EXPECT_TRUE(fd != -1); |
| 2527 | |
| 2528 | res = getAsyncResponse(fd, &rcode, buf, MAXPACKET); |
| 2529 | EXPECT_GT(res, 0); |
| 2530 | EXPECT_EQ("1.2.3.4", toString(buf, res, AF_INET)); |
| 2531 | |
| 2532 | EXPECT_EQ(0x0053U, htons(hp->id)); |
| 2533 | |
| 2534 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
Luke Huang | ba7bef9 | 2018-12-26 16:53:03 +0800 | [diff] [blame] | 2535 | } |
| 2536 | |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2537 | // This test checks that the resolver should not generate the request containing OPT RR when using |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2538 | // cleartext DNS. If we query the DNS server not supporting EDNS0 and it reponds with |
| 2539 | // FORMERR_ON_EDNS, we will fallback to no EDNS0 and try again. If the server does no response, we |
| 2540 | // won't retry so that we get no answer. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2541 | TEST_F(ResolverTest, BrokenEdns) { |
| 2542 | typedef test::DNSResponder::Edns Edns; |
| 2543 | enum ExpectResult { EXPECT_FAILURE, EXPECT_SUCCESS }; |
| 2544 | |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2545 | // Perform cleartext query in off mode. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2546 | const char OFF[] = "off"; |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2547 | |
| 2548 | // Perform cleartext query when there's no private DNS server validated in opportunistic mode. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2549 | const char OPPORTUNISTIC_UDP[] = "opportunistic_udp"; |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2550 | |
| 2551 | // Perform cleartext query when there is a private DNS server validated in opportunistic mode. |
| 2552 | const char OPPORTUNISTIC_FALLBACK_UDP[] = "opportunistic_fallback_udp"; |
| 2553 | |
| 2554 | // Perform cyphertext query in opportunistic mode. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2555 | const char OPPORTUNISTIC_TLS[] = "opportunistic_tls"; |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2556 | |
| 2557 | // Perform cyphertext query in strict mode. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2558 | const char STRICT[] = "strict"; |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2559 | |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2560 | const char GETHOSTBYNAME[] = "gethostbyname"; |
| 2561 | const char GETADDRINFO[] = "getaddrinfo"; |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2562 | const char ADDR4[] = "192.0.2.1"; |
| 2563 | const char CLEARTEXT_ADDR[] = "127.0.0.53"; |
| 2564 | const char CLEARTEXT_PORT[] = "53"; |
| 2565 | const char TLS_PORT[] = "853"; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 2566 | const std::vector<std::string> servers = {CLEARTEXT_ADDR}; |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2567 | ResolverParamsParcel paramsForCleanup = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 2568 | paramsForCleanup.servers.clear(); |
| 2569 | paramsForCleanup.tlsServers.clear(); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2570 | |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 2571 | test::DNSResponder dns(CLEARTEXT_ADDR, CLEARTEXT_PORT, ns_rcode::ns_r_servfail); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2572 | ASSERT_TRUE(dns.startServer()); |
| 2573 | |
| 2574 | test::DnsTlsFrontend tls(CLEARTEXT_ADDR, TLS_PORT, CLEARTEXT_ADDR, CLEARTEXT_PORT); |
| 2575 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 2576 | // clang-format off |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2577 | static const struct TestConfig { |
| 2578 | std::string mode; |
| 2579 | std::string method; |
| 2580 | Edns edns; |
| 2581 | ExpectResult expectResult; |
| 2582 | |
| 2583 | std::string asHostName() const { |
| 2584 | const char* ednsString; |
| 2585 | switch (edns) { |
| 2586 | case Edns::ON: |
| 2587 | ednsString = "ednsOn"; |
| 2588 | break; |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2589 | case Edns::FORMERR_ON_EDNS: |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2590 | ednsString = "ednsFormerr"; |
| 2591 | break; |
| 2592 | case Edns::DROP: |
| 2593 | ednsString = "ednsDrop"; |
| 2594 | break; |
| 2595 | default: |
| 2596 | ednsString = ""; |
| 2597 | break; |
| 2598 | } |
| 2599 | return StringPrintf("%s.%s.%s.", mode.c_str(), method.c_str(), ednsString); |
| 2600 | } |
| 2601 | } testConfigs[] = { |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2602 | // In OPPORTUNISTIC_TLS, if the DNS server doesn't support EDNS0 but TLS, the lookup |
| 2603 | // fails. Could such server exist? if so, we might need to fix it to fallback to |
| 2604 | // cleartext query. If the server still make no response for the queries with EDNS0, we |
| 2605 | // might also need to fix it to retry without EDNS0. |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2606 | // Another thing is that {OPPORTUNISTIC_TLS, Edns::DROP} and {STRICT, Edns::DROP} are |
| 2607 | // commented out since TLS timeout is not configurable. |
| 2608 | // TODO: Uncomment them after TLS timeout is configurable. |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2609 | {OFF, GETHOSTBYNAME, Edns::ON, EXPECT_SUCCESS}, |
| 2610 | {OPPORTUNISTIC_UDP, GETHOSTBYNAME, Edns::ON, EXPECT_SUCCESS}, |
| 2611 | {OPPORTUNISTIC_FALLBACK_UDP, GETHOSTBYNAME, Edns::ON, EXPECT_SUCCESS}, |
| 2612 | {OPPORTUNISTIC_TLS, GETHOSTBYNAME, Edns::ON, EXPECT_SUCCESS}, |
| 2613 | {STRICT, GETHOSTBYNAME, Edns::ON, EXPECT_SUCCESS}, |
| 2614 | {OFF, GETHOSTBYNAME, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2615 | {OPPORTUNISTIC_UDP, GETHOSTBYNAME, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2616 | {OPPORTUNISTIC_FALLBACK_UDP, GETHOSTBYNAME, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2617 | {OPPORTUNISTIC_TLS, GETHOSTBYNAME, Edns::FORMERR_ON_EDNS, EXPECT_FAILURE}, |
| 2618 | {STRICT, GETHOSTBYNAME, Edns::FORMERR_ON_EDNS, EXPECT_FAILURE}, |
| 2619 | {OFF, GETHOSTBYNAME, Edns::DROP, EXPECT_SUCCESS}, |
| 2620 | {OPPORTUNISTIC_UDP, GETHOSTBYNAME, Edns::DROP, EXPECT_SUCCESS}, |
| 2621 | |
| 2622 | // The failure is due to no retry on timeout. Maybe fix it? |
| 2623 | {OPPORTUNISTIC_FALLBACK_UDP, GETHOSTBYNAME, Edns::DROP, EXPECT_FAILURE}, |
| 2624 | |
| 2625 | //{OPPORTUNISTIC_TLS, GETHOSTBYNAME, Edns::DROP, EXPECT_FAILURE}, |
| 2626 | //{STRICT, GETHOSTBYNAME, Edns::DROP, EXPECT_FAILURE}, |
| 2627 | {OFF, GETADDRINFO, Edns::ON, EXPECT_SUCCESS}, |
| 2628 | {OPPORTUNISTIC_UDP, GETADDRINFO, Edns::ON, EXPECT_SUCCESS}, |
| 2629 | {OPPORTUNISTIC_FALLBACK_UDP, GETADDRINFO, Edns::ON, EXPECT_SUCCESS}, |
| 2630 | {OPPORTUNISTIC_TLS, GETADDRINFO, Edns::ON, EXPECT_SUCCESS}, |
| 2631 | {STRICT, GETADDRINFO, Edns::ON, EXPECT_SUCCESS}, |
| 2632 | {OFF, GETADDRINFO, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2633 | {OPPORTUNISTIC_UDP, GETADDRINFO, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2634 | {OPPORTUNISTIC_FALLBACK_UDP, GETADDRINFO, Edns::FORMERR_ON_EDNS, EXPECT_SUCCESS}, |
| 2635 | {OPPORTUNISTIC_TLS, GETADDRINFO, Edns::FORMERR_ON_EDNS, EXPECT_FAILURE}, |
| 2636 | {STRICT, GETADDRINFO, Edns::FORMERR_ON_EDNS, EXPECT_FAILURE}, |
| 2637 | {OFF, GETADDRINFO, Edns::DROP, EXPECT_SUCCESS}, |
| 2638 | {OPPORTUNISTIC_UDP, GETADDRINFO, Edns::DROP, EXPECT_SUCCESS}, |
| 2639 | |
| 2640 | // The failure is due to no retry on timeout. Maybe fix it? |
| 2641 | {OPPORTUNISTIC_FALLBACK_UDP, GETADDRINFO, Edns::DROP, EXPECT_FAILURE}, |
| 2642 | |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2643 | //{OPPORTUNISTIC_TLS, GETADDRINFO, Edns::DROP, EXPECT_FAILURE}, |
| 2644 | //{STRICT, GETADDRINFO, Edns::DROP, EXPECT_FAILURE}, |
| 2645 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 2646 | // clang-format on |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2647 | |
| 2648 | for (const auto& config : testConfigs) { |
| 2649 | const std::string testHostName = config.asHostName(); |
| 2650 | SCOPED_TRACE(testHostName); |
| 2651 | |
| 2652 | const char* host_name = testHostName.c_str(); |
| 2653 | dns.addMapping(host_name, ns_type::ns_t_a, ADDR4); |
| 2654 | dns.setEdns(config.edns); |
| 2655 | |
| 2656 | if (config.mode == OFF) { |
Mike Yu | 0f20cdd | 2019-06-11 11:52:37 +0800 | [diff] [blame] | 2657 | if (tls.running()) { |
| 2658 | ASSERT_TRUE(tls.stopServer()); |
| 2659 | } |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2660 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2661 | } else if (config.mode == OPPORTUNISTIC_UDP) { |
Mike Yu | 0f20cdd | 2019-06-11 11:52:37 +0800 | [diff] [blame] | 2662 | if (tls.running()) { |
| 2663 | ASSERT_TRUE(tls.stopServer()); |
| 2664 | } |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2665 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 2666 | kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 2667 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), false)); |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2668 | } else if (config.mode == OPPORTUNISTIC_TLS || config.mode == OPPORTUNISTIC_FALLBACK_UDP) { |
Mike Yu | 0f20cdd | 2019-06-11 11:52:37 +0800 | [diff] [blame] | 2669 | if (!tls.running()) { |
| 2670 | ASSERT_TRUE(tls.startServer()); |
| 2671 | } |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2672 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 2673 | kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 2674 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2675 | |
| 2676 | if (config.mode == OPPORTUNISTIC_FALLBACK_UDP) { |
| 2677 | // Force the resolver to fallback to cleartext queries. |
| 2678 | ASSERT_TRUE(tls.stopServer()); |
| 2679 | } |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2680 | } else if (config.mode == STRICT) { |
Mike Yu | 0f20cdd | 2019-06-11 11:52:37 +0800 | [diff] [blame] | 2681 | if (!tls.running()) { |
| 2682 | ASSERT_TRUE(tls.startServer()); |
| 2683 | } |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2684 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 2685 | kDefaultParams, kDefaultPrivateDnsHostName)); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 2686 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2687 | } |
| 2688 | |
| 2689 | if (config.method == GETHOSTBYNAME) { |
| 2690 | const hostent* h_result = gethostbyname(host_name); |
| 2691 | if (config.expectResult == EXPECT_SUCCESS) { |
| 2692 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 2693 | ASSERT_TRUE(h_result != nullptr); |
| 2694 | ASSERT_EQ(4, h_result->h_length); |
| 2695 | ASSERT_FALSE(h_result->h_addr_list[0] == nullptr); |
| 2696 | EXPECT_EQ(ADDR4, ToString(h_result)); |
| 2697 | EXPECT_TRUE(h_result->h_addr_list[1] == nullptr); |
| 2698 | } else { |
| 2699 | EXPECT_EQ(0U, GetNumQueriesForType(dns, ns_type::ns_t_a, host_name)); |
| 2700 | ASSERT_TRUE(h_result == nullptr); |
| 2701 | ASSERT_EQ(HOST_NOT_FOUND, h_errno); |
| 2702 | } |
| 2703 | } else if (config.method == GETADDRINFO) { |
| 2704 | ScopedAddrinfo ai_result; |
| 2705 | addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 2706 | ai_result = safe_getaddrinfo(host_name, nullptr, &hints); |
| 2707 | if (config.expectResult == EXPECT_SUCCESS) { |
| 2708 | EXPECT_TRUE(ai_result != nullptr); |
| 2709 | EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| 2710 | const std::string result_str = ToString(ai_result); |
| 2711 | EXPECT_EQ(ADDR4, result_str); |
| 2712 | } else { |
| 2713 | EXPECT_TRUE(ai_result == nullptr); |
| 2714 | EXPECT_EQ(0U, GetNumQueries(dns, host_name)); |
| 2715 | } |
| 2716 | } else { |
| 2717 | FAIL() << "Unsupported query method: " << config.method; |
| 2718 | } |
| 2719 | |
Mike Yu | dd4ac2d | 2019-05-31 16:52:11 +0800 | [diff] [blame] | 2720 | tls.clearQueries(); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2721 | dns.clearQueries(); |
Automerger Merge Worker | 9a495be | 2020-03-05 14:07:09 +0000 | [diff] [blame] | 2722 | |
| 2723 | // Clear the setup to force the resolver to validate private DNS servers in every test. |
| 2724 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(paramsForCleanup)); |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2725 | } |
Mike Yu | 4f3747b | 2018-12-02 17:54:29 +0900 | [diff] [blame] | 2726 | } |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2727 | |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2728 | // DNS-over-TLS validation success, but server does not respond to TLS query after a while. |
| 2729 | // Resolver should have a reasonable number of retries instead of spinning forever. We don't have |
| 2730 | // an efficient way to know if resolver is stuck in an infinite loop. However, test case will be |
| 2731 | // failed due to timeout. |
| 2732 | TEST_F(ResolverTest, UnstableTls) { |
| 2733 | const char CLEARTEXT_ADDR[] = "127.0.0.53"; |
| 2734 | const char CLEARTEXT_PORT[] = "53"; |
| 2735 | const char TLS_PORT[] = "853"; |
| 2736 | const char* host_name1 = "nonexistent1.example.com."; |
| 2737 | const char* host_name2 = "nonexistent2.example.com."; |
| 2738 | const std::vector<std::string> servers = {CLEARTEXT_ADDR}; |
| 2739 | |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 2740 | test::DNSResponder dns(CLEARTEXT_ADDR, CLEARTEXT_PORT, ns_rcode::ns_r_servfail); |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2741 | ASSERT_TRUE(dns.startServer()); |
| 2742 | dns.setEdns(test::DNSResponder::Edns::FORMERR_ON_EDNS); |
| 2743 | test::DnsTlsFrontend tls(CLEARTEXT_ADDR, TLS_PORT, CLEARTEXT_ADDR, CLEARTEXT_PORT); |
| 2744 | ASSERT_TRUE(tls.startServer()); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 2745 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 2746 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
| 2747 | |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2748 | // Shutdown TLS server to get an error. It's similar to no response case but without waiting. |
| 2749 | tls.stopServer(); |
| 2750 | |
| 2751 | const hostent* h_result = gethostbyname(host_name1); |
| 2752 | EXPECT_EQ(1U, GetNumQueries(dns, host_name1)); |
| 2753 | ASSERT_TRUE(h_result == nullptr); |
| 2754 | ASSERT_EQ(HOST_NOT_FOUND, h_errno); |
| 2755 | |
| 2756 | addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 2757 | ScopedAddrinfo ai_result = safe_getaddrinfo(host_name2, nullptr, &hints); |
| 2758 | EXPECT_TRUE(ai_result == nullptr); |
| 2759 | EXPECT_EQ(1U, GetNumQueries(dns, host_name2)); |
| 2760 | } |
| 2761 | |
| 2762 | // DNS-over-TLS validation success, but server does not respond to TLS query after a while. |
| 2763 | // Moreover, server responds RCODE=FORMERR even on non-EDNS query. |
| 2764 | TEST_F(ResolverTest, BogusDnsServer) { |
| 2765 | const char CLEARTEXT_ADDR[] = "127.0.0.53"; |
| 2766 | const char CLEARTEXT_PORT[] = "53"; |
| 2767 | const char TLS_PORT[] = "853"; |
| 2768 | const char* host_name1 = "nonexistent1.example.com."; |
| 2769 | const char* host_name2 = "nonexistent2.example.com."; |
| 2770 | const std::vector<std::string> servers = {CLEARTEXT_ADDR}; |
| 2771 | |
Mike Yu | fc125e4 | 2019-05-15 20:41:28 +0800 | [diff] [blame] | 2772 | test::DNSResponder dns(CLEARTEXT_ADDR, CLEARTEXT_PORT, ns_rcode::ns_r_servfail); |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2773 | ASSERT_TRUE(dns.startServer()); |
| 2774 | test::DnsTlsFrontend tls(CLEARTEXT_ADDR, TLS_PORT, CLEARTEXT_ADDR, CLEARTEXT_PORT); |
| 2775 | ASSERT_TRUE(tls.startServer()); |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 2776 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 2777 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
| 2778 | |
Ken Chen | 0a01553 | 2019-01-02 14:59:38 +0800 | [diff] [blame] | 2779 | // Shutdown TLS server to get an error. It's similar to no response case but without waiting. |
| 2780 | tls.stopServer(); |
| 2781 | dns.setEdns(test::DNSResponder::Edns::FORMERR_UNCOND); |
| 2782 | |
| 2783 | const hostent* h_result = gethostbyname(host_name1); |
| 2784 | EXPECT_EQ(0U, GetNumQueries(dns, host_name1)); |
| 2785 | ASSERT_TRUE(h_result == nullptr); |
| 2786 | ASSERT_EQ(HOST_NOT_FOUND, h_errno); |
| 2787 | |
| 2788 | addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 2789 | ScopedAddrinfo ai_result = safe_getaddrinfo(host_name2, nullptr, &hints); |
| 2790 | EXPECT_TRUE(ai_result == nullptr); |
| 2791 | EXPECT_EQ(0U, GetNumQueries(dns, host_name2)); |
| 2792 | } |
| 2793 | |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2794 | TEST_F(ResolverTest, GetAddrInfo_Dns64Synthesize) { |
| 2795 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2796 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 2797 | constexpr char host_name[] = "v4only.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2798 | const std::vector<DnsRecord> records = { |
| 2799 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 2800 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2801 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2802 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2803 | test::DNSResponder dns(listen_addr); |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2804 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2805 | |
| 2806 | std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2807 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2808 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2809 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2810 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2811 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2812 | |
| 2813 | // hints are necessary in order to let netd know which type of addresses the caller is |
| 2814 | // interested in. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2815 | const addrinfo hints = {.ai_family = AF_UNSPEC}; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2816 | ScopedAddrinfo result = safe_getaddrinfo("v4only", nullptr, &hints); |
| 2817 | EXPECT_TRUE(result != nullptr); |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2818 | // TODO: BUG: there should only be two queries, one AAAA (which returns no records) and one A |
| 2819 | // (which returns 1.2.3.4). But there is an extra AAAA. |
| 2820 | EXPECT_EQ(3U, GetNumQueries(dns, host_name)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2821 | |
| 2822 | std::string result_str = ToString(result); |
| 2823 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 2824 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2825 | // Stopping NAT64 prefix discovery disables synthesis. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2826 | EXPECT_TRUE(mDnsClient.resolvService()->stopPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2827 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_NOT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2828 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2829 | dns.clearQueries(); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2830 | |
| 2831 | result = safe_getaddrinfo("v4only", nullptr, &hints); |
| 2832 | EXPECT_TRUE(result != nullptr); |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2833 | // TODO: BUG: there should only be one query, an AAAA (which returns no records), because the |
| 2834 | // A is already cached. But there is an extra AAAA. |
| 2835 | EXPECT_EQ(2U, GetNumQueries(dns, host_name)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2836 | |
| 2837 | result_str = ToString(result); |
| 2838 | EXPECT_EQ(result_str, "1.2.3.4"); |
| 2839 | } |
| 2840 | |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2841 | TEST_F(ResolverTest, GetAddrInfo_Dns64QuerySpecified) { |
| 2842 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2843 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 2844 | constexpr char host_name[] = "v4only.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2845 | const std::vector<DnsRecord> records = { |
| 2846 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 2847 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2848 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2849 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2850 | test::DNSResponder dns(listen_addr); |
| 2851 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2852 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2853 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2854 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2855 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2856 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2857 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2858 | |
| 2859 | // Ensure to synthesize AAAA if AF_INET6 is specified, and not to synthesize AAAA |
| 2860 | // in AF_INET case. |
| 2861 | addrinfo hints; |
| 2862 | memset(&hints, 0, sizeof(hints)); |
| 2863 | hints.ai_family = AF_INET6; |
| 2864 | ScopedAddrinfo result = safe_getaddrinfo("v4only", nullptr, &hints); |
| 2865 | EXPECT_TRUE(result != nullptr); |
| 2866 | std::string result_str = ToString(result); |
| 2867 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 2868 | |
| 2869 | hints.ai_family = AF_INET; |
| 2870 | result = safe_getaddrinfo("v4only", nullptr, &hints); |
| 2871 | EXPECT_TRUE(result != nullptr); |
| 2872 | EXPECT_LE(2U, GetNumQueries(dns, host_name)); |
| 2873 | result_str = ToString(result); |
| 2874 | EXPECT_EQ(result_str, "1.2.3.4"); |
| 2875 | } |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2876 | |
| 2877 | TEST_F(ResolverTest, GetAddrInfo_Dns64QueryUnspecifiedV6) { |
| 2878 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2879 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 2880 | constexpr char host_name[] = "v4v6.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2881 | const std::vector<DnsRecord> records = { |
| 2882 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 2883 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2884 | {host_name, ns_type::ns_t_aaaa, "2001:db8::1.2.3.4"}, |
| 2885 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2886 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2887 | test::DNSResponder dns(listen_addr); |
| 2888 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2889 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2890 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2891 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2892 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2893 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2894 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2895 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2896 | const addrinfo hints = {.ai_family = AF_UNSPEC}; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2897 | ScopedAddrinfo result = safe_getaddrinfo("v4v6", nullptr, &hints); |
| 2898 | EXPECT_TRUE(result != nullptr); |
| 2899 | EXPECT_LE(2U, GetNumQueries(dns, host_name)); |
| 2900 | |
| 2901 | // In AF_UNSPEC case, do not synthesize AAAA if there's at least one AAAA answer. |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2902 | const std::vector<std::string> result_strs = ToStrings(result); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2903 | for (const auto& str : result_strs) { |
| 2904 | EXPECT_TRUE(str == "1.2.3.4" || str == "2001:db8::102:304") |
| 2905 | << ", result_str='" << str << "'"; |
| 2906 | } |
| 2907 | } |
| 2908 | |
| 2909 | TEST_F(ResolverTest, GetAddrInfo_Dns64QueryUnspecifiedNoV6) { |
| 2910 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2911 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 2912 | constexpr char host_name[] = "v4v6.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2913 | const std::vector<DnsRecord> records = { |
| 2914 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 2915 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 2916 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2917 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2918 | test::DNSResponder dns(listen_addr); |
| 2919 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2920 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2921 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2922 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2923 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2924 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2925 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2926 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2927 | const addrinfo hints = {.ai_family = AF_UNSPEC}; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2928 | ScopedAddrinfo result = safe_getaddrinfo("v4v6", nullptr, &hints); |
| 2929 | EXPECT_TRUE(result != nullptr); |
| 2930 | EXPECT_LE(2U, GetNumQueries(dns, host_name)); |
| 2931 | |
| 2932 | // In AF_UNSPEC case, synthesize AAAA if there's no AAAA answer. |
| 2933 | std::string result_str = ToString(result); |
| 2934 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 2935 | } |
| 2936 | |
| 2937 | TEST_F(ResolverTest, GetAddrInfo_Dns64QuerySpecialUseIPv4Addresses) { |
| 2938 | constexpr char THIS_NETWORK[] = "this_network"; |
| 2939 | constexpr char LOOPBACK[] = "loopback"; |
| 2940 | constexpr char LINK_LOCAL[] = "link_local"; |
| 2941 | constexpr char MULTICAST[] = "multicast"; |
| 2942 | constexpr char LIMITED_BROADCAST[] = "limited_broadcast"; |
| 2943 | |
| 2944 | constexpr char ADDR_THIS_NETWORK[] = "0.0.0.1"; |
| 2945 | constexpr char ADDR_LOOPBACK[] = "127.0.0.1"; |
| 2946 | constexpr char ADDR_LINK_LOCAL[] = "169.254.0.1"; |
| 2947 | constexpr char ADDR_MULTICAST[] = "224.0.0.1"; |
| 2948 | constexpr char ADDR_LIMITED_BROADCAST[] = "255.255.255.255"; |
| 2949 | |
| 2950 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2951 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 2952 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2953 | test::DNSResponder dns(listen_addr); |
| 2954 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::"}}); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2955 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 2956 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2957 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 2958 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 2959 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 2960 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2961 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 2962 | // clang-format off |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2963 | static const struct TestConfig { |
| 2964 | std::string name; |
| 2965 | std::string addr; |
| 2966 | |
| 2967 | std::string asHostName() const { return StringPrintf("%s.example.com.", name.c_str()); } |
| 2968 | } testConfigs[]{ |
| 2969 | {THIS_NETWORK, ADDR_THIS_NETWORK}, |
| 2970 | {LOOPBACK, ADDR_LOOPBACK}, |
| 2971 | {LINK_LOCAL, ADDR_LINK_LOCAL}, |
| 2972 | {MULTICAST, ADDR_MULTICAST}, |
| 2973 | {LIMITED_BROADCAST, ADDR_LIMITED_BROADCAST} |
| 2974 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 2975 | // clang-format on |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 2976 | |
| 2977 | for (const auto& config : testConfigs) { |
| 2978 | const std::string testHostName = config.asHostName(); |
| 2979 | SCOPED_TRACE(testHostName); |
| 2980 | |
| 2981 | const char* host_name = testHostName.c_str(); |
| 2982 | dns.addMapping(host_name, ns_type::ns_t_a, config.addr.c_str()); |
| 2983 | |
| 2984 | addrinfo hints; |
| 2985 | memset(&hints, 0, sizeof(hints)); |
| 2986 | hints.ai_family = AF_INET6; |
| 2987 | ScopedAddrinfo result = safe_getaddrinfo(config.name.c_str(), nullptr, &hints); |
| 2988 | // In AF_INET6 case, don't return IPv4 answers |
| 2989 | EXPECT_TRUE(result == nullptr); |
| 2990 | EXPECT_LE(2U, GetNumQueries(dns, host_name)); |
| 2991 | dns.clearQueries(); |
| 2992 | |
| 2993 | memset(&hints, 0, sizeof(hints)); |
| 2994 | hints.ai_family = AF_UNSPEC; |
| 2995 | result = safe_getaddrinfo(config.name.c_str(), nullptr, &hints); |
| 2996 | EXPECT_TRUE(result != nullptr); |
| 2997 | // Expect IPv6 query only. IPv4 answer has been cached in previous query. |
| 2998 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 2999 | // In AF_UNSPEC case, don't synthesize special use IPv4 address. |
| 3000 | std::string result_str = ToString(result); |
| 3001 | EXPECT_EQ(result_str, config.addr.c_str()); |
| 3002 | dns.clearQueries(); |
| 3003 | } |
| 3004 | } |
| 3005 | |
| 3006 | TEST_F(ResolverTest, GetAddrInfo_Dns64QueryWithNullArgumentHints) { |
| 3007 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3008 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3009 | constexpr char host_name[] = "v4only.example.com."; |
| 3010 | constexpr char host_name2[] = "v4v6.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3011 | const std::vector<DnsRecord> records = { |
| 3012 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3013 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 3014 | {host_name2, ns_type::ns_t_a, "1.2.3.4"}, |
| 3015 | {host_name2, ns_type::ns_t_aaaa, "2001:db8::1.2.3.4"}, |
| 3016 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3017 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3018 | test::DNSResponder dns(listen_addr); |
| 3019 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3020 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3021 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3022 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3023 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3024 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3025 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3026 | |
| 3027 | // Assign argument hints of getaddrinfo() as null is equivalent to set ai_family AF_UNSPEC. |
| 3028 | // In AF_UNSPEC case, synthesize AAAA if there has A answer only. |
| 3029 | ScopedAddrinfo result = safe_getaddrinfo("v4only", nullptr, nullptr); |
| 3030 | EXPECT_TRUE(result != nullptr); |
| 3031 | EXPECT_LE(2U, GetNumQueries(dns, host_name)); |
| 3032 | std::string result_str = ToString(result); |
| 3033 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 3034 | dns.clearQueries(); |
| 3035 | |
| 3036 | // In AF_UNSPEC case, do not synthesize AAAA if there's at least one AAAA answer. |
| 3037 | result = safe_getaddrinfo("v4v6", nullptr, nullptr); |
| 3038 | EXPECT_TRUE(result != nullptr); |
| 3039 | EXPECT_LE(2U, GetNumQueries(dns, host_name2)); |
| 3040 | std::vector<std::string> result_strs = ToStrings(result); |
| 3041 | for (const auto& str : result_strs) { |
| 3042 | EXPECT_TRUE(str == "1.2.3.4" || str == "2001:db8::102:304") |
| 3043 | << ", result_str='" << str << "'"; |
| 3044 | } |
| 3045 | } |
| 3046 | |
| 3047 | TEST_F(ResolverTest, GetAddrInfo_Dns64QueryNullArgumentNode) { |
| 3048 | constexpr char ADDR_ANYADDR_V4[] = "0.0.0.0"; |
| 3049 | constexpr char ADDR_ANYADDR_V6[] = "::"; |
| 3050 | constexpr char ADDR_LOCALHOST_V4[] = "127.0.0.1"; |
| 3051 | constexpr char ADDR_LOCALHOST_V6[] = "::1"; |
| 3052 | |
| 3053 | constexpr char PORT_NAME_HTTP[] = "http"; |
| 3054 | constexpr char PORT_NUMBER_HTTP[] = "80"; |
| 3055 | |
| 3056 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3057 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3058 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3059 | test::DNSResponder dns(listen_addr); |
| 3060 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::"}}); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3061 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3062 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3063 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3064 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3065 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3066 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3067 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3068 | // clang-format off |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3069 | // If node is null, return address is listed by libc/getaddrinfo.c as follows. |
| 3070 | // - passive socket -> anyaddr (0.0.0.0 or ::) |
| 3071 | // - non-passive socket -> localhost (127.0.0.1 or ::1) |
| 3072 | static const struct TestConfig { |
| 3073 | int flag; |
| 3074 | std::string addr_v4; |
| 3075 | std::string addr_v6; |
| 3076 | |
| 3077 | std::string asParameters() const { |
| 3078 | return StringPrintf("flag=%d, addr_v4=%s, addr_v6=%s", flag, addr_v4.c_str(), |
| 3079 | addr_v6.c_str()); |
| 3080 | } |
| 3081 | } testConfigs[]{ |
| 3082 | {0 /* non-passive */, ADDR_LOCALHOST_V4, ADDR_LOCALHOST_V6}, |
| 3083 | {AI_PASSIVE, ADDR_ANYADDR_V4, ADDR_ANYADDR_V6} |
| 3084 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3085 | // clang-format on |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3086 | |
| 3087 | for (const auto& config : testConfigs) { |
| 3088 | SCOPED_TRACE(config.asParameters()); |
| 3089 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3090 | addrinfo hints = { |
Nick Desaulniers | cd6395a | 2019-10-11 09:15:24 -0700 | [diff] [blame] | 3091 | .ai_flags = config.flag, |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3092 | .ai_family = AF_UNSPEC, // any address family |
| 3093 | .ai_socktype = 0, // any type |
| 3094 | .ai_protocol = 0, // any protocol |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3095 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3096 | |
| 3097 | // Assign hostname as null and service as port name. |
| 3098 | ScopedAddrinfo result = safe_getaddrinfo(nullptr, PORT_NAME_HTTP, &hints); |
| 3099 | ASSERT_TRUE(result != nullptr); |
| 3100 | |
| 3101 | // Can't be synthesized because it should not get into Netd. |
| 3102 | std::vector<std::string> result_strs = ToStrings(result); |
| 3103 | for (const auto& str : result_strs) { |
| 3104 | EXPECT_TRUE(str == config.addr_v4 || str == config.addr_v6) |
| 3105 | << ", result_str='" << str << "'"; |
| 3106 | } |
| 3107 | |
| 3108 | // Assign hostname as null and service as numeric port number. |
| 3109 | hints.ai_flags = config.flag | AI_NUMERICSERV; |
| 3110 | result = safe_getaddrinfo(nullptr, PORT_NUMBER_HTTP, &hints); |
| 3111 | ASSERT_TRUE(result != nullptr); |
| 3112 | |
| 3113 | // Can't be synthesized because it should not get into Netd. |
| 3114 | result_strs = ToStrings(result); |
| 3115 | for (const auto& str : result_strs) { |
| 3116 | EXPECT_TRUE(str == config.addr_v4 || str == config.addr_v6) |
| 3117 | << ", result_str='" << str << "'"; |
| 3118 | } |
| 3119 | } |
| 3120 | } |
| 3121 | |
| 3122 | TEST_F(ResolverTest, GetHostByAddr_ReverseDnsQueryWithHavingNat64Prefix) { |
| 3123 | struct hostent* result = nullptr; |
| 3124 | struct in_addr v4addr; |
| 3125 | struct in6_addr v6addr; |
| 3126 | |
| 3127 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3128 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3129 | constexpr char ptr_name[] = "v4v6.example.com."; |
| 3130 | // PTR record for IPv4 address 1.2.3.4 |
| 3131 | constexpr char ptr_addr_v4[] = "4.3.2.1.in-addr.arpa."; |
| 3132 | // PTR record for IPv6 address 2001:db8::102:304 |
| 3133 | constexpr char ptr_addr_v6[] = |
| 3134 | "4.0.3.0.2.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3135 | const std::vector<DnsRecord> records = { |
| 3136 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3137 | {ptr_addr_v4, ns_type::ns_t_ptr, ptr_name}, |
| 3138 | {ptr_addr_v6, ns_type::ns_t_ptr, ptr_name}, |
| 3139 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3140 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3141 | test::DNSResponder dns(listen_addr); |
| 3142 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3143 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3144 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3145 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3146 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3147 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3148 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3149 | |
| 3150 | // Reverse IPv4 DNS query. Prefix should have no effect on it. |
| 3151 | inet_pton(AF_INET, "1.2.3.4", &v4addr); |
| 3152 | result = gethostbyaddr(&v4addr, sizeof(v4addr), AF_INET); |
| 3153 | ASSERT_TRUE(result != nullptr); |
| 3154 | std::string result_str = result->h_name ? result->h_name : "null"; |
| 3155 | EXPECT_EQ(result_str, "v4v6.example.com"); |
| 3156 | |
| 3157 | // Reverse IPv6 DNS query. Prefix should have no effect on it. |
| 3158 | inet_pton(AF_INET6, "2001:db8::102:304", &v6addr); |
| 3159 | result = gethostbyaddr(&v6addr, sizeof(v6addr), AF_INET6); |
| 3160 | ASSERT_TRUE(result != nullptr); |
| 3161 | result_str = result->h_name ? result->h_name : "null"; |
| 3162 | EXPECT_EQ(result_str, "v4v6.example.com"); |
| 3163 | } |
| 3164 | |
| 3165 | TEST_F(ResolverTest, GetHostByAddr_ReverseDns64Query) { |
| 3166 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3167 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3168 | constexpr char ptr_name[] = "v4only.example.com."; |
| 3169 | // PTR record for IPv4 address 1.2.3.4 |
| 3170 | constexpr char ptr_addr_v4[] = "4.3.2.1.in-addr.arpa."; |
| 3171 | // PTR record for IPv6 address 64:ff9b::1.2.3.4 |
| 3172 | constexpr char ptr_addr_v6_nomapping[] = |
| 3173 | "4.0.3.0.2.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.9.f.f.4.6.0.0.ip6.arpa."; |
| 3174 | constexpr char ptr_name_v6_synthesis[] = "v6synthesis.example.com."; |
| 3175 | // PTR record for IPv6 address 64:ff9b::5.6.7.8 |
| 3176 | constexpr char ptr_addr_v6_synthesis[] = |
| 3177 | "8.0.7.0.6.0.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.9.f.f.4.6.0.0.ip6.arpa."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3178 | const std::vector<DnsRecord> records = { |
| 3179 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3180 | {ptr_addr_v4, ns_type::ns_t_ptr, ptr_name}, |
| 3181 | {ptr_addr_v6_synthesis, ns_type::ns_t_ptr, ptr_name_v6_synthesis}, |
| 3182 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3183 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3184 | test::DNSResponder dns(listen_addr); |
| 3185 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3186 | // "ptr_addr_v6_nomapping" is not mapped in DNS server |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3187 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3188 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3189 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3190 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3191 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3192 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3193 | |
| 3194 | // Synthesized PTR record doesn't exist on DNS server |
| 3195 | // Reverse IPv6 DNS64 query while DNS server doesn't have an answer for synthesized address. |
| 3196 | // After querying synthesized address failed, expect that prefix is removed from IPv6 |
| 3197 | // synthesized address and do reverse IPv4 query instead. |
| 3198 | struct in6_addr v6addr; |
| 3199 | inet_pton(AF_INET6, "64:ff9b::1.2.3.4", &v6addr); |
| 3200 | struct hostent* result = gethostbyaddr(&v6addr, sizeof(v6addr), AF_INET6); |
| 3201 | ASSERT_TRUE(result != nullptr); |
| 3202 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v6_nomapping)); // PTR record not exist |
| 3203 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v4)); // PTR record exist |
| 3204 | std::string result_str = result->h_name ? result->h_name : "null"; |
| 3205 | EXPECT_EQ(result_str, "v4only.example.com"); |
| 3206 | // Check that return address has been mapped from IPv4 to IPv6 address because Netd |
| 3207 | // removes NAT64 prefix and does IPv4 DNS reverse lookup in this case. Then, Netd |
| 3208 | // fakes the return IPv4 address as original queried IPv6 address. |
| 3209 | result_str = ToString(result); |
| 3210 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 3211 | dns.clearQueries(); |
| 3212 | |
| 3213 | // Synthesized PTR record exists on DNS server |
| 3214 | // Reverse IPv6 DNS64 query while DNS server has an answer for synthesized address. |
| 3215 | // Expect to Netd pass through synthesized address for DNS queries. |
| 3216 | inet_pton(AF_INET6, "64:ff9b::5.6.7.8", &v6addr); |
| 3217 | result = gethostbyaddr(&v6addr, sizeof(v6addr), AF_INET6); |
| 3218 | ASSERT_TRUE(result != nullptr); |
| 3219 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v6_synthesis)); |
| 3220 | result_str = result->h_name ? result->h_name : "null"; |
| 3221 | EXPECT_EQ(result_str, "v6synthesis.example.com"); |
| 3222 | } |
| 3223 | |
| 3224 | TEST_F(ResolverTest, GetHostByAddr_ReverseDns64QueryFromHostFile) { |
| 3225 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3226 | constexpr char host_name[] = "localhost"; |
| 3227 | // The address is synthesized by prefix64:localhost. |
| 3228 | constexpr char host_addr[] = "64:ff9b::7f00:1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3229 | constexpr char listen_addr[] = "::1"; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3230 | |
| 3231 | test::DNSResponder dns(listen_addr); |
| 3232 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}}); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3233 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3234 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3235 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3236 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3237 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3238 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3239 | |
| 3240 | // Using synthesized "localhost" address to be a trick for resolving host name |
| 3241 | // from host file /etc/hosts and "localhost" is the only name in /etc/hosts. Note that this is |
| 3242 | // not realistic: the code never synthesizes AAAA records for addresses in 127.0.0.0/8. |
| 3243 | struct in6_addr v6addr; |
| 3244 | inet_pton(AF_INET6, host_addr, &v6addr); |
| 3245 | struct hostent* result = gethostbyaddr(&v6addr, sizeof(v6addr), AF_INET6); |
| 3246 | ASSERT_TRUE(result != nullptr); |
| 3247 | // Expect no DNS queries; localhost is resolved via /etc/hosts. |
| 3248 | EXPECT_EQ(0U, GetNumQueries(dns, host_name)); |
| 3249 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3250 | ASSERT_EQ(sizeof(in6_addr), (unsigned)result->h_length); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3251 | ASSERT_EQ(AF_INET6, result->h_addrtype); |
| 3252 | std::string result_str = ToString(result); |
| 3253 | EXPECT_EQ(result_str, host_addr); |
| 3254 | result_str = result->h_name ? result->h_name : "null"; |
| 3255 | EXPECT_EQ(result_str, host_name); |
| 3256 | } |
| 3257 | |
Hungming Chen | 9e6185a | 2019-06-04 16:09:19 +0800 | [diff] [blame] | 3258 | TEST_F(ResolverTest, GetHostByAddr_cnamesClasslessReverseDelegation) { |
| 3259 | // IPv4 addresses in the subnet with notation '/' or '-'. |
| 3260 | constexpr char addr_slash[] = "192.0.2.1"; |
| 3261 | constexpr char addr_hyphen[] = "192.0.3.1"; |
| 3262 | |
| 3263 | // Used to verify DNS reverse query for classless reverse lookup zone. See detail in RFC 2317 |
| 3264 | // section 4. |
| 3265 | const static std::vector<DnsRecord> records = { |
| 3266 | // The records for reverse querying "192.0.2.1" in the subnet with notation '/'. |
| 3267 | {"1.2.0.192.in-addr.arpa.", ns_type::ns_t_cname, "1.0/25.2.0.192.in-addr.arpa."}, |
| 3268 | {"1.0/25.2.0.192.in-addr.arpa.", ns_type::ns_t_ptr, kHelloExampleCom}, |
| 3269 | |
| 3270 | // The records for reverse querying "192.0.3.1" in the subnet with notation '-'. |
| 3271 | {"1.3.0.192.in-addr.arpa.", ns_type::ns_t_cname, "1.0-127.3.0.192.in-addr.arpa."}, |
| 3272 | {"1.0-127.3.0.192.in-addr.arpa.", ns_type::ns_t_ptr, kHelloExampleCom}, |
| 3273 | }; |
| 3274 | |
| 3275 | test::DNSResponder dns; |
| 3276 | StartDns(dns, records); |
| 3277 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 3278 | |
| 3279 | for (const auto& address : {addr_slash, addr_hyphen}) { |
| 3280 | SCOPED_TRACE(address); |
| 3281 | |
| 3282 | in_addr v4addr; |
| 3283 | ASSERT_TRUE(inet_pton(AF_INET, address, &v4addr)); |
| 3284 | hostent* result = gethostbyaddr(&v4addr, sizeof(v4addr), AF_INET); |
| 3285 | ASSERT_TRUE(result != nullptr); |
| 3286 | EXPECT_STREQ("hello.example.com", result->h_name); |
| 3287 | } |
| 3288 | } |
| 3289 | |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3290 | TEST_F(ResolverTest, GetNameInfo_ReverseDnsQueryWithHavingNat64Prefix) { |
| 3291 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3292 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3293 | constexpr char ptr_name[] = "v4v6.example.com."; |
| 3294 | // PTR record for IPv4 address 1.2.3.4 |
| 3295 | constexpr char ptr_addr_v4[] = "4.3.2.1.in-addr.arpa."; |
| 3296 | // PTR record for IPv6 address 2001:db8::102:304 |
| 3297 | constexpr char ptr_addr_v6[] = |
| 3298 | "4.0.3.0.2.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.8.b.d.0.1.0.0.2.ip6.arpa."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3299 | const std::vector<DnsRecord> records = { |
| 3300 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3301 | {ptr_addr_v4, ns_type::ns_t_ptr, ptr_name}, |
| 3302 | {ptr_addr_v6, ns_type::ns_t_ptr, ptr_name}, |
| 3303 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3304 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3305 | test::DNSResponder dns(listen_addr); |
| 3306 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3307 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3308 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3309 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3310 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3311 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3312 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3313 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3314 | // clang-format off |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3315 | static const struct TestConfig { |
| 3316 | int flag; |
| 3317 | int family; |
| 3318 | std::string addr; |
| 3319 | std::string host; |
| 3320 | |
| 3321 | std::string asParameters() const { |
| 3322 | return StringPrintf("flag=%d, family=%d, addr=%s, host=%s", flag, family, addr.c_str(), |
| 3323 | host.c_str()); |
| 3324 | } |
| 3325 | } testConfigs[]{ |
| 3326 | {NI_NAMEREQD, AF_INET, "1.2.3.4", "v4v6.example.com"}, |
| 3327 | {NI_NUMERICHOST, AF_INET, "1.2.3.4", "1.2.3.4"}, |
| 3328 | {0, AF_INET, "1.2.3.4", "v4v6.example.com"}, |
| 3329 | {0, AF_INET, "5.6.7.8", "5.6.7.8"}, // unmapped |
| 3330 | {NI_NAMEREQD, AF_INET6, "2001:db8::102:304", "v4v6.example.com"}, |
| 3331 | {NI_NUMERICHOST, AF_INET6, "2001:db8::102:304", "2001:db8::102:304"}, |
| 3332 | {0, AF_INET6, "2001:db8::102:304", "v4v6.example.com"}, |
| 3333 | {0, AF_INET6, "2001:db8::506:708", "2001:db8::506:708"}, // unmapped |
| 3334 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3335 | // clang-format on |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3336 | |
| 3337 | // Reverse IPv4/IPv6 DNS query. Prefix should have no effect on it. |
| 3338 | for (const auto& config : testConfigs) { |
| 3339 | SCOPED_TRACE(config.asParameters()); |
| 3340 | |
| 3341 | int rv; |
| 3342 | char host[NI_MAXHOST]; |
| 3343 | struct sockaddr_in sin; |
| 3344 | struct sockaddr_in6 sin6; |
| 3345 | if (config.family == AF_INET) { |
| 3346 | memset(&sin, 0, sizeof(sin)); |
| 3347 | sin.sin_family = AF_INET; |
| 3348 | inet_pton(AF_INET, config.addr.c_str(), &sin.sin_addr); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3349 | rv = getnameinfo((const struct sockaddr*)&sin, sizeof(sin), host, sizeof(host), nullptr, |
| 3350 | 0, config.flag); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3351 | if (config.flag == NI_NAMEREQD) EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v4)); |
| 3352 | } else if (config.family == AF_INET6) { |
| 3353 | memset(&sin6, 0, sizeof(sin6)); |
| 3354 | sin6.sin6_family = AF_INET6; |
| 3355 | inet_pton(AF_INET6, config.addr.c_str(), &sin6.sin6_addr); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3356 | rv = getnameinfo((const struct sockaddr*)&sin6, sizeof(sin6), host, sizeof(host), |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3357 | nullptr, 0, config.flag); |
| 3358 | if (config.flag == NI_NAMEREQD) EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v6)); |
| 3359 | } |
| 3360 | ASSERT_EQ(0, rv); |
| 3361 | std::string result_str = host; |
| 3362 | EXPECT_EQ(result_str, config.host); |
| 3363 | dns.clearQueries(); |
| 3364 | } |
| 3365 | } |
| 3366 | |
| 3367 | TEST_F(ResolverTest, GetNameInfo_ReverseDns64Query) { |
| 3368 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3369 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3370 | constexpr char ptr_name[] = "v4only.example.com."; |
| 3371 | // PTR record for IPv4 address 1.2.3.4 |
| 3372 | constexpr char ptr_addr_v4[] = "4.3.2.1.in-addr.arpa."; |
| 3373 | // PTR record for IPv6 address 64:ff9b::1.2.3.4 |
| 3374 | constexpr char ptr_addr_v6_nomapping[] = |
| 3375 | "4.0.3.0.2.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.9.f.f.4.6.0.0.ip6.arpa."; |
| 3376 | constexpr char ptr_name_v6_synthesis[] = "v6synthesis.example.com."; |
| 3377 | // PTR record for IPv6 address 64:ff9b::5.6.7.8 |
| 3378 | constexpr char ptr_addr_v6_synthesis[] = |
| 3379 | "8.0.7.0.6.0.5.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.b.9.f.f.4.6.0.0.ip6.arpa."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3380 | const std::vector<DnsRecord> records = { |
| 3381 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3382 | {ptr_addr_v4, ns_type::ns_t_ptr, ptr_name}, |
| 3383 | {ptr_addr_v6_synthesis, ns_type::ns_t_ptr, ptr_name_v6_synthesis}, |
| 3384 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3385 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3386 | test::DNSResponder dns(listen_addr); |
| 3387 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3388 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3389 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3390 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3391 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3392 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3393 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3394 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3395 | // clang-format off |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3396 | static const struct TestConfig { |
| 3397 | bool hasSynthesizedPtrRecord; |
| 3398 | int flag; |
| 3399 | std::string addr; |
| 3400 | std::string host; |
| 3401 | |
| 3402 | std::string asParameters() const { |
| 3403 | return StringPrintf("hasSynthesizedPtrRecord=%d, flag=%d, addr=%s, host=%s", |
| 3404 | hasSynthesizedPtrRecord, flag, addr.c_str(), host.c_str()); |
| 3405 | } |
| 3406 | } testConfigs[]{ |
| 3407 | {false, NI_NAMEREQD, "64:ff9b::102:304", "v4only.example.com"}, |
| 3408 | {false, NI_NUMERICHOST, "64:ff9b::102:304", "64:ff9b::102:304"}, |
| 3409 | {false, 0, "64:ff9b::102:304", "v4only.example.com"}, |
| 3410 | {true, NI_NAMEREQD, "64:ff9b::506:708", "v6synthesis.example.com"}, |
| 3411 | {true, NI_NUMERICHOST, "64:ff9b::506:708", "64:ff9b::506:708"}, |
| 3412 | {true, 0, "64:ff9b::506:708", "v6synthesis.example.com"} |
| 3413 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3414 | // clang-format on |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3415 | |
| 3416 | // hasSynthesizedPtrRecord = false |
| 3417 | // Synthesized PTR record doesn't exist on DNS server |
| 3418 | // Reverse IPv6 DNS64 query while DNS server doesn't have an answer for synthesized address. |
| 3419 | // After querying synthesized address failed, expect that prefix is removed from IPv6 |
| 3420 | // synthesized address and do reverse IPv4 query instead. |
| 3421 | // |
| 3422 | // hasSynthesizedPtrRecord = true |
| 3423 | // Synthesized PTR record exists on DNS server |
| 3424 | // Reverse IPv6 DNS64 query while DNS server has an answer for synthesized address. |
| 3425 | // Expect to just pass through synthesized address for DNS queries. |
| 3426 | for (const auto& config : testConfigs) { |
| 3427 | SCOPED_TRACE(config.asParameters()); |
| 3428 | |
| 3429 | char host[NI_MAXHOST]; |
| 3430 | struct sockaddr_in6 sin6; |
| 3431 | memset(&sin6, 0, sizeof(sin6)); |
| 3432 | sin6.sin6_family = AF_INET6; |
| 3433 | inet_pton(AF_INET6, config.addr.c_str(), &sin6.sin6_addr); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3434 | int rv = getnameinfo((const struct sockaddr*)&sin6, sizeof(sin6), host, sizeof(host), |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3435 | nullptr, 0, config.flag); |
| 3436 | ASSERT_EQ(0, rv); |
| 3437 | if (config.flag == NI_NAMEREQD) { |
| 3438 | if (config.hasSynthesizedPtrRecord) { |
| 3439 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v6_synthesis)); |
| 3440 | } else { |
| 3441 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v6_nomapping)); // PTR record not exist. |
| 3442 | EXPECT_LE(1U, GetNumQueries(dns, ptr_addr_v4)); // PTR record exist. |
| 3443 | } |
| 3444 | } |
| 3445 | std::string result_str = host; |
| 3446 | EXPECT_EQ(result_str, config.host); |
| 3447 | dns.clearQueries(); |
| 3448 | } |
| 3449 | } |
| 3450 | |
| 3451 | TEST_F(ResolverTest, GetNameInfo_ReverseDns64QueryFromHostFile) { |
| 3452 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3453 | constexpr char host_name[] = "localhost"; |
| 3454 | // The address is synthesized by prefix64:localhost. |
| 3455 | constexpr char host_addr[] = "64:ff9b::7f00:1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3456 | constexpr char listen_addr[] = "::1"; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3457 | |
| 3458 | test::DNSResponder dns(listen_addr); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3459 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3460 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}}); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3461 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3462 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3463 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3464 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3465 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3466 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3467 | |
| 3468 | // Using synthesized "localhost" address to be a trick for resolving host name |
| 3469 | // from host file /etc/hosts and "localhost" is the only name in /etc/hosts. Note that this is |
| 3470 | // not realistic: the code never synthesizes AAAA records for addresses in 127.0.0.0/8. |
| 3471 | char host[NI_MAXHOST]; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3472 | struct sockaddr_in6 sin6 = {.sin6_family = AF_INET6}; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3473 | inet_pton(AF_INET6, host_addr, &sin6.sin6_addr); |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3474 | int rv = getnameinfo((const struct sockaddr*)&sin6, sizeof(sin6), host, sizeof(host), nullptr, |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3475 | 0, NI_NAMEREQD); |
| 3476 | ASSERT_EQ(0, rv); |
| 3477 | // Expect no DNS queries; localhost is resolved via /etc/hosts. |
| 3478 | EXPECT_EQ(0U, GetNumQueries(dns, host_name)); |
| 3479 | |
| 3480 | std::string result_str = host; |
| 3481 | EXPECT_EQ(result_str, host_name); |
| 3482 | } |
| 3483 | |
Hungming Chen | 9e6185a | 2019-06-04 16:09:19 +0800 | [diff] [blame] | 3484 | TEST_F(ResolverTest, GetNameInfo_cnamesClasslessReverseDelegation) { |
| 3485 | // IPv4 addresses in the subnet with notation '/' or '-'. |
| 3486 | constexpr char addr_slash[] = "192.0.2.1"; |
| 3487 | constexpr char addr_hyphen[] = "192.0.3.1"; |
| 3488 | |
| 3489 | // Used to verify DNS reverse query for classless reverse lookup zone. See detail in RFC 2317 |
| 3490 | // section 4. |
| 3491 | const static std::vector<DnsRecord> records = { |
| 3492 | // The records for reverse querying "192.0.2.1" in the subnet with notation '/'. |
| 3493 | {"1.2.0.192.in-addr.arpa.", ns_type::ns_t_cname, "1.0/25.2.0.192.in-addr.arpa."}, |
| 3494 | {"1.0/25.2.0.192.in-addr.arpa.", ns_type::ns_t_ptr, kHelloExampleCom}, |
| 3495 | |
| 3496 | // The records for reverse querying "192.0.3.1" in the subnet with notation '-'. |
| 3497 | {"1.3.0.192.in-addr.arpa.", ns_type::ns_t_cname, "1.0-127.3.0.192.in-addr.arpa."}, |
| 3498 | {"1.0-127.3.0.192.in-addr.arpa.", ns_type::ns_t_ptr, kHelloExampleCom}, |
| 3499 | }; |
| 3500 | |
| 3501 | test::DNSResponder dns; |
| 3502 | StartDns(dns, records); |
| 3503 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 3504 | |
| 3505 | for (const auto& address : {addr_slash, addr_hyphen}) { |
| 3506 | SCOPED_TRACE(address); |
| 3507 | |
| 3508 | char host[NI_MAXHOST]; |
| 3509 | sockaddr_in sin = {.sin_family = AF_INET}; |
| 3510 | ASSERT_TRUE(inet_pton(AF_INET, address, &sin.sin_addr)); |
| 3511 | int rv = getnameinfo((const sockaddr*)&sin, sizeof(sin), host, sizeof(host), nullptr, 0, |
| 3512 | NI_NAMEREQD); |
| 3513 | ASSERT_EQ(0, rv); |
| 3514 | EXPECT_STREQ("hello.example.com", host); |
| 3515 | } |
| 3516 | } |
| 3517 | |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3518 | TEST_F(ResolverTest, GetHostByName2_Dns64Synthesize) { |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3519 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3520 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3521 | constexpr char host_name[] = "ipv4only.example.com."; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3522 | const std::vector<DnsRecord> records = { |
| 3523 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3524 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 3525 | }; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3526 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3527 | test::DNSResponder dns(listen_addr); |
| 3528 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3529 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3530 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3531 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3532 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3533 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3534 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3535 | |
| 3536 | // Query an IPv4-only hostname. Expect that gets a synthesized address. |
| 3537 | struct hostent* result = gethostbyname2("ipv4only", AF_INET6); |
| 3538 | ASSERT_TRUE(result != nullptr); |
| 3539 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 3540 | std::string result_str = ToString(result); |
| 3541 | EXPECT_EQ(result_str, "64:ff9b::102:304"); |
| 3542 | } |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3543 | |
| 3544 | TEST_F(ResolverTest, GetHostByName2_DnsQueryWithHavingNat64Prefix) { |
| 3545 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3546 | constexpr char host_name[] = "v4v6.example.com."; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3547 | constexpr char listen_addr[] = "::1"; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3548 | const std::vector<DnsRecord> records = { |
| 3549 | {dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}, |
| 3550 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 3551 | {host_name, ns_type::ns_t_aaaa, "2001:db8::1.2.3.4"}, |
| 3552 | }; |
| 3553 | |
| 3554 | test::DNSResponder dns(listen_addr); |
| 3555 | StartDns(dns, records); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3556 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3557 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3558 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3559 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3560 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3561 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3562 | |
| 3563 | // IPv4 DNS query. Prefix should have no effect on it. |
| 3564 | struct hostent* result = gethostbyname2("v4v6", AF_INET); |
| 3565 | ASSERT_TRUE(result != nullptr); |
| 3566 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 3567 | std::string result_str = ToString(result); |
| 3568 | EXPECT_EQ(result_str, "1.2.3.4"); |
| 3569 | dns.clearQueries(); |
| 3570 | |
| 3571 | // IPv6 DNS query. Prefix should have no effect on it. |
| 3572 | result = gethostbyname2("v4v6", AF_INET6); |
| 3573 | ASSERT_TRUE(result != nullptr); |
| 3574 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 3575 | result_str = ToString(result); |
| 3576 | EXPECT_EQ(result_str, "2001:db8::102:304"); |
| 3577 | } |
| 3578 | |
| 3579 | TEST_F(ResolverTest, GetHostByName2_Dns64QuerySpecialUseIPv4Addresses) { |
| 3580 | constexpr char THIS_NETWORK[] = "this_network"; |
| 3581 | constexpr char LOOPBACK[] = "loopback"; |
| 3582 | constexpr char LINK_LOCAL[] = "link_local"; |
| 3583 | constexpr char MULTICAST[] = "multicast"; |
| 3584 | constexpr char LIMITED_BROADCAST[] = "limited_broadcast"; |
| 3585 | |
| 3586 | constexpr char ADDR_THIS_NETWORK[] = "0.0.0.1"; |
| 3587 | constexpr char ADDR_LOOPBACK[] = "127.0.0.1"; |
| 3588 | constexpr char ADDR_LINK_LOCAL[] = "169.254.0.1"; |
| 3589 | constexpr char ADDR_MULTICAST[] = "224.0.0.1"; |
| 3590 | constexpr char ADDR_LIMITED_BROADCAST[] = "255.255.255.255"; |
| 3591 | |
| 3592 | constexpr char listen_addr[] = "::1"; |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3593 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3594 | |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3595 | test::DNSResponder dns(listen_addr); |
| 3596 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::"}}); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3597 | const std::vector<std::string> servers = {listen_addr}; |
Xiao Ma | 09b7102 | 2018-12-11 17:56:32 +0900 | [diff] [blame] | 3598 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3599 | |
Lorenzo Colitti | d39345c | 2019-02-18 10:59:29 +0900 | [diff] [blame] | 3600 | // Start NAT64 prefix discovery and wait for it to complete. |
Luke Huang | 5bd827c | 2019-03-14 16:10:04 +0800 | [diff] [blame] | 3601 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3602 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3603 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3604 | // clang-format off |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3605 | static const struct TestConfig { |
| 3606 | std::string name; |
| 3607 | std::string addr; |
| 3608 | |
| 3609 | std::string asHostName() const { |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3610 | return StringPrintf("%s.example.com.", name.c_str()); |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3611 | } |
| 3612 | } testConfigs[]{ |
| 3613 | {THIS_NETWORK, ADDR_THIS_NETWORK}, |
| 3614 | {LOOPBACK, ADDR_LOOPBACK}, |
| 3615 | {LINK_LOCAL, ADDR_LINK_LOCAL}, |
| 3616 | {MULTICAST, ADDR_MULTICAST}, |
| 3617 | {LIMITED_BROADCAST, ADDR_LIMITED_BROADCAST} |
| 3618 | }; |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3619 | // clang-format on |
nuccachen | a26cc2a | 2018-07-17 18:07:23 +0800 | [diff] [blame] | 3620 | |
| 3621 | for (const auto& config : testConfigs) { |
| 3622 | const std::string testHostName = config.asHostName(); |
| 3623 | SCOPED_TRACE(testHostName); |
| 3624 | |
| 3625 | const char* host_name = testHostName.c_str(); |
| 3626 | dns.addMapping(host_name, ns_type::ns_t_a, config.addr.c_str()); |
| 3627 | |
| 3628 | struct hostent* result = gethostbyname2(config.name.c_str(), AF_INET6); |
| 3629 | EXPECT_LE(1U, GetNumQueries(dns, host_name)); |
| 3630 | |
| 3631 | // In AF_INET6 case, don't synthesize special use IPv4 address. |
| 3632 | // Expect to have no answer |
| 3633 | EXPECT_EQ(nullptr, result); |
| 3634 | |
| 3635 | dns.clearQueries(); |
| 3636 | } |
Bernie Innocenti | 2fef2b8 | 2018-12-20 15:56:40 +0900 | [diff] [blame] | 3637 | } |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3638 | |
| 3639 | TEST_F(ResolverTest, PrefixDiscoveryBypassTls) { |
| 3640 | constexpr char listen_addr[] = "::1"; |
| 3641 | constexpr char cleartext_port[] = "53"; |
| 3642 | constexpr char tls_port[] = "853"; |
| 3643 | constexpr char dns64_name[] = "ipv4only.arpa."; |
| 3644 | const std::vector<std::string> servers = {listen_addr}; |
| 3645 | |
| 3646 | test::DNSResponder dns(listen_addr); |
| 3647 | StartDns(dns, {{dns64_name, ns_type::ns_t_aaaa, "64:ff9b::192.0.0.170"}}); |
| 3648 | test::DnsTlsFrontend tls(listen_addr, tls_port, listen_addr, cleartext_port); |
| 3649 | ASSERT_TRUE(tls.startServer()); |
| 3650 | |
| 3651 | // Setup OPPORTUNISTIC mode and wait for the validation complete. |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 3652 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, "")); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 3653 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3654 | EXPECT_TRUE(tls.waitForQueries(1)); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3655 | tls.clearQueries(); |
| 3656 | |
| 3657 | // Start NAT64 prefix discovery and wait for it complete. |
| 3658 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3659 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3660 | |
| 3661 | // Verify it bypassed TLS even though there's a TLS server available. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3662 | EXPECT_EQ(0, tls.queries()) << dns.dumpQueries(); |
| 3663 | EXPECT_EQ(1U, GetNumQueries(dns, dns64_name)) << dns.dumpQueries(); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3664 | |
| 3665 | // Restart the testing network to reset the cache. |
| 3666 | mDnsClient.TearDown(); |
| 3667 | mDnsClient.SetUp(); |
| 3668 | dns.clearQueries(); |
| 3669 | |
| 3670 | // Setup STRICT mode and wait for the validation complete. |
waynema | 0e73c2e | 2019-07-31 15:04:08 +0800 | [diff] [blame] | 3671 | ASSERT_TRUE(mDnsClient.SetResolversWithTls(servers, kDefaultSearchDomains, kDefaultParams, |
| 3672 | kDefaultPrivateDnsHostName)); |
Mike Yu | 724f77d | 2019-08-16 11:14:50 +0800 | [diff] [blame] | 3673 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3674 | EXPECT_TRUE(tls.waitForQueries(1)); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3675 | tls.clearQueries(); |
| 3676 | |
| 3677 | // Start NAT64 prefix discovery and wait for it to complete. |
| 3678 | EXPECT_TRUE(mDnsClient.resolvService()->startPrefix64Discovery(TEST_NETID).isOk()); |
Hungming Chen | e8f970c | 2019-04-10 17:34:06 +0800 | [diff] [blame] | 3679 | EXPECT_TRUE(WaitForNat64Prefix(EXPECT_FOUND)); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3680 | |
| 3681 | // Verify it bypassed TLS despite STRICT mode. |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3682 | EXPECT_EQ(0, tls.queries()) << dns.dumpQueries(); |
| 3683 | EXPECT_EQ(1U, GetNumQueries(dns, dns64_name)) << dns.dumpQueries(); |
Mike Yu | f14e1a9 | 2019-05-10 13:54:58 +0800 | [diff] [blame] | 3684 | } |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3685 | |
| 3686 | namespace { |
| 3687 | |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3688 | class ScopedSetNetworkForProcess { |
| 3689 | public: |
| 3690 | explicit ScopedSetNetworkForProcess(unsigned netId) { |
| 3691 | mStoredNetId = getNetworkForProcess(); |
| 3692 | if (netId == mStoredNetId) return; |
| 3693 | EXPECT_EQ(0, setNetworkForProcess(netId)); |
| 3694 | } |
| 3695 | ~ScopedSetNetworkForProcess() { EXPECT_EQ(0, setNetworkForProcess(mStoredNetId)); } |
| 3696 | |
| 3697 | private: |
| 3698 | unsigned mStoredNetId; |
| 3699 | }; |
| 3700 | |
| 3701 | class ScopedSetNetworkForResolv { |
| 3702 | public: |
| 3703 | explicit ScopedSetNetworkForResolv(unsigned netId) { EXPECT_EQ(0, setNetworkForResolv(netId)); } |
| 3704 | ~ScopedSetNetworkForResolv() { EXPECT_EQ(0, setNetworkForResolv(NETID_UNSET)); } |
| 3705 | }; |
| 3706 | |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3707 | void sendCommand(int fd, const std::string& cmd) { |
| 3708 | ssize_t rc = TEMP_FAILURE_RETRY(write(fd, cmd.c_str(), cmd.size() + 1)); |
| 3709 | EXPECT_EQ(rc, static_cast<ssize_t>(cmd.size() + 1)); |
| 3710 | } |
| 3711 | |
| 3712 | int32_t readBE32(int fd) { |
| 3713 | int32_t tmp; |
| 3714 | int n = TEMP_FAILURE_RETRY(read(fd, &tmp, sizeof(tmp))); |
| 3715 | EXPECT_TRUE(n > 0); |
| 3716 | return ntohl(tmp); |
| 3717 | } |
| 3718 | |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3719 | int readResponseCode(int fd) { |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3720 | char buf[4]; |
| 3721 | int n = TEMP_FAILURE_RETRY(read(fd, &buf, sizeof(buf))); |
| 3722 | EXPECT_TRUE(n > 0); |
| 3723 | // The format of response code is that 4 bytes for the code & null. |
| 3724 | buf[3] = '\0'; |
| 3725 | int result; |
| 3726 | EXPECT_TRUE(ParseInt(buf, &result)); |
| 3727 | return result; |
| 3728 | } |
| 3729 | |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3730 | bool checkAndClearUseLocalNameserversFlag(unsigned* netid) { |
| 3731 | if (netid == nullptr || ((*netid) & NETID_USE_LOCAL_NAMESERVERS) == 0) { |
| 3732 | return false; |
| 3733 | } |
| 3734 | *netid = (*netid) & ~NETID_USE_LOCAL_NAMESERVERS; |
| 3735 | return true; |
| 3736 | } |
| 3737 | |
Luke Huang | f821537 | 2019-11-22 11:53:41 +0800 | [diff] [blame] | 3738 | aidl::android::net::UidRangeParcel makeUidRangeParcel(int start, int stop) { |
| 3739 | aidl::android::net::UidRangeParcel res; |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3740 | res.start = start; |
| 3741 | res.stop = stop; |
| 3742 | |
| 3743 | return res; |
| 3744 | } |
| 3745 | |
| 3746 | void expectNetIdWithLocalNameserversFlag(unsigned netId) { |
| 3747 | unsigned dnsNetId = 0; |
| 3748 | EXPECT_EQ(0, getNetworkForDns(&dnsNetId)); |
| 3749 | EXPECT_TRUE(checkAndClearUseLocalNameserversFlag(&dnsNetId)); |
| 3750 | EXPECT_EQ(netId, static_cast<unsigned>(dnsNetId)); |
| 3751 | } |
| 3752 | |
| 3753 | void expectDnsNetIdEquals(unsigned netId) { |
| 3754 | unsigned dnsNetId = 0; |
| 3755 | EXPECT_EQ(0, getNetworkForDns(&dnsNetId)); |
| 3756 | EXPECT_EQ(netId, static_cast<unsigned>(dnsNetId)); |
| 3757 | } |
| 3758 | |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3759 | void expectDnsNetIdIsDefaultNetwork(INetd* netdService) { |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3760 | int currentNetid; |
| 3761 | EXPECT_TRUE(netdService->networkGetDefault(¤tNetid).isOk()); |
| 3762 | expectDnsNetIdEquals(currentNetid); |
| 3763 | } |
| 3764 | |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3765 | void expectDnsNetIdWithVpn(INetd* netdService, unsigned vpnNetId, unsigned expectedNetId) { |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3766 | EXPECT_TRUE(netdService->networkCreateVpn(vpnNetId, false /* secure */).isOk()); |
| 3767 | uid_t uid = getuid(); |
| 3768 | // Add uid to VPN |
| 3769 | EXPECT_TRUE(netdService->networkAddUidRanges(vpnNetId, {makeUidRangeParcel(uid, uid)}).isOk()); |
| 3770 | expectDnsNetIdEquals(expectedNetId); |
| 3771 | EXPECT_TRUE(netdService->networkDestroy(vpnNetId).isOk()); |
| 3772 | } |
| 3773 | |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3774 | } // namespace |
| 3775 | |
| 3776 | TEST_F(ResolverTest, getDnsNetId) { |
| 3777 | // We've called setNetworkForProcess in SetupOemNetwork, so reset to default first. |
| 3778 | setNetworkForProcess(NETID_UNSET); |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3779 | |
| 3780 | expectDnsNetIdIsDefaultNetwork(mDnsClient.netdService()); |
| 3781 | expectDnsNetIdWithVpn(mDnsClient.netdService(), TEST_VPN_NETID, TEST_VPN_NETID); |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3782 | |
| 3783 | // Test with setNetworkForProcess |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3784 | { |
| 3785 | ScopedSetNetworkForProcess scopedSetNetworkForProcess(TEST_NETID); |
| 3786 | expectDnsNetIdEquals(TEST_NETID); |
| 3787 | } |
| 3788 | |
| 3789 | // Test with setNetworkForProcess with NETID_USE_LOCAL_NAMESERVERS |
| 3790 | { |
| 3791 | ScopedSetNetworkForProcess scopedSetNetworkForProcess(TEST_NETID | |
| 3792 | NETID_USE_LOCAL_NAMESERVERS); |
| 3793 | expectNetIdWithLocalNameserversFlag(TEST_NETID); |
| 3794 | } |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3795 | |
| 3796 | // Test with setNetworkForResolv |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3797 | { |
| 3798 | ScopedSetNetworkForResolv scopedSetNetworkForResolv(TEST_NETID); |
| 3799 | expectDnsNetIdEquals(TEST_NETID); |
| 3800 | } |
| 3801 | |
| 3802 | // Test with setNetworkForResolv with NETID_USE_LOCAL_NAMESERVERS |
| 3803 | { |
| 3804 | ScopedSetNetworkForResolv scopedSetNetworkForResolv(TEST_NETID | |
| 3805 | NETID_USE_LOCAL_NAMESERVERS); |
| 3806 | expectNetIdWithLocalNameserversFlag(TEST_NETID); |
| 3807 | } |
| 3808 | |
| 3809 | // Test with setNetworkForResolv under bypassable vpn |
| 3810 | { |
| 3811 | ScopedSetNetworkForResolv scopedSetNetworkForResolv(TEST_NETID); |
| 3812 | expectDnsNetIdWithVpn(mDnsClient.netdService(), TEST_VPN_NETID, TEST_NETID); |
| 3813 | } |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3814 | |
| 3815 | // Create socket connected to DnsProxyListener |
| 3816 | int fd = dns_open_proxy(); |
| 3817 | EXPECT_TRUE(fd > 0); |
| 3818 | unique_fd ufd(fd); |
| 3819 | |
| 3820 | // Test command with wrong netId |
| 3821 | sendCommand(fd, "getdnsnetid abc"); |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3822 | EXPECT_EQ(ResponseCode::DnsProxyQueryResult, readResponseCode(fd)); |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3823 | EXPECT_EQ(-EINVAL, readBE32(fd)); |
| 3824 | |
| 3825 | // Test unsupported command |
| 3826 | sendCommand(fd, "getdnsnetidNotSupported"); |
| 3827 | // Keep in sync with FrameworkListener.cpp (500, "Command not recognized") |
Luke Huang | 0d592bc | 2019-05-25 18:24:03 +0800 | [diff] [blame] | 3828 | EXPECT_EQ(500, readResponseCode(fd)); |
Luke Huang | 9807e6b | 2019-05-20 16:17:12 +0800 | [diff] [blame] | 3829 | } |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3830 | |
| 3831 | TEST_F(ResolverTest, BlockDnsQueryWithUidRule) { |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3832 | // This test relies on blocking traffic on loopback, which xt_qtaguid does not do. |
| 3833 | // See aosp/358413 and b/34444781 for why. |
| 3834 | SKIP_IF_BPF_NOT_SUPPORTED; |
| 3835 | |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3836 | constexpr char listen_addr1[] = "127.0.0.4"; |
| 3837 | constexpr char listen_addr2[] = "::1"; |
| 3838 | constexpr char host_name[] = "howdy.example.com."; |
| 3839 | const std::vector<DnsRecord> records = { |
| 3840 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 3841 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 3842 | }; |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3843 | INetd* netdService = mDnsClient.netdService(); |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3844 | |
| 3845 | test::DNSResponder dns1(listen_addr1); |
| 3846 | test::DNSResponder dns2(listen_addr2); |
| 3847 | StartDns(dns1, records); |
| 3848 | StartDns(dns2, records); |
| 3849 | |
| 3850 | std::vector<std::string> servers = {listen_addr1, listen_addr2}; |
| 3851 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork(servers)); |
| 3852 | dns1.clearQueries(); |
| 3853 | dns2.clearQueries(); |
| 3854 | |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3855 | // Add drop rule for TEST_UID. Also enable the standby chain because it might not be enabled. |
| 3856 | // Unfortunately we cannot use FIREWALL_CHAIN_NONE, or custom iptables rules, for this purpose |
| 3857 | // because netd calls fchown() on the DNS query sockets, and "iptables -m owner" matches the |
| 3858 | // UID of the socket creator, not the UID set by fchown(). |
| 3859 | // |
| 3860 | // TODO: migrate FIREWALL_CHAIN_NONE to eBPF as well. |
| 3861 | EXPECT_TRUE(netdService->firewallEnableChildChain(INetd::FIREWALL_CHAIN_STANDBY, true).isOk()); |
| 3862 | EXPECT_TRUE(netdService |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3863 | ->firewallSetUidRule(INetd::FIREWALL_CHAIN_STANDBY, TEST_UID, |
| 3864 | INetd::FIREWALL_RULE_DENY) |
| 3865 | .isOk()); |
| 3866 | |
| 3867 | // Save uid |
| 3868 | int suid = getuid(); |
| 3869 | |
| 3870 | // Switch to TEST_UID |
| 3871 | EXPECT_TRUE(seteuid(TEST_UID) == 0); |
| 3872 | |
| 3873 | // Dns Query |
| 3874 | int fd1 = resNetworkQuery(TEST_NETID, host_name, ns_c_in, ns_t_a, 0); |
| 3875 | int fd2 = resNetworkQuery(TEST_NETID, host_name, ns_c_in, ns_t_aaaa, 0); |
| 3876 | EXPECT_TRUE(fd1 != -1); |
| 3877 | EXPECT_TRUE(fd2 != -1); |
| 3878 | |
| 3879 | uint8_t buf[MAXPACKET] = {}; |
| 3880 | int rcode; |
| 3881 | int res = getAsyncResponse(fd2, &rcode, buf, MAXPACKET); |
| 3882 | EXPECT_EQ(-ECONNREFUSED, res); |
| 3883 | |
| 3884 | memset(buf, 0, MAXPACKET); |
| 3885 | res = getAsyncResponse(fd1, &rcode, buf, MAXPACKET); |
| 3886 | EXPECT_EQ(-ECONNREFUSED, res); |
| 3887 | |
| 3888 | // Restore uid |
| 3889 | EXPECT_TRUE(seteuid(suid) == 0); |
| 3890 | |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3891 | // Remove drop rule for TEST_UID, and disable the standby chain. |
| 3892 | EXPECT_TRUE(netdService |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3893 | ->firewallSetUidRule(INetd::FIREWALL_CHAIN_STANDBY, TEST_UID, |
| 3894 | INetd::FIREWALL_RULE_ALLOW) |
| 3895 | .isOk()); |
Lorenzo Colitti | eb9aeec | 2019-06-26 19:53:55 +0900 | [diff] [blame] | 3896 | EXPECT_TRUE(netdService->firewallEnableChildChain(INetd::FIREWALL_CHAIN_STANDBY, false).isOk()); |
Sehee Park | 2c11878 | 2019-05-07 13:02:45 +0900 | [diff] [blame] | 3897 | } |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3898 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3899 | namespace { |
| 3900 | |
| 3901 | const std::string kDotConnectTimeoutMsFlag( |
| 3902 | "persist.device_config.netd_native.dot_connect_timeout_ms"); |
| 3903 | |
| 3904 | class ScopedSystemProperties { |
| 3905 | public: |
| 3906 | explicit ScopedSystemProperties(const std::string& key, const std::string& value) |
| 3907 | : mStoredKey(key) { |
| 3908 | mStoredValue = android::base::GetProperty(key, ""); |
| 3909 | android::base::SetProperty(key, value); |
| 3910 | } |
| 3911 | ~ScopedSystemProperties() { android::base::SetProperty(mStoredKey, mStoredValue); } |
| 3912 | |
| 3913 | private: |
| 3914 | std::string mStoredKey; |
| 3915 | std::string mStoredValue; |
| 3916 | }; |
| 3917 | |
| 3918 | } // namespace |
| 3919 | |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3920 | TEST_F(ResolverTest, ConnectTlsServerTimeout) { |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3921 | constexpr int expectedTimeout = 1000; |
| 3922 | constexpr char hostname1[] = "query1.example.com."; |
| 3923 | constexpr char hostname2[] = "query2.example.com."; |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3924 | const std::vector<DnsRecord> records = { |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3925 | {hostname1, ns_type::ns_t_a, "1.2.3.4"}, |
| 3926 | {hostname2, ns_type::ns_t_a, "1.2.3.5"}, |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3927 | }; |
| 3928 | |
| 3929 | test::DNSResponder dns; |
| 3930 | StartDns(dns, records); |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3931 | test::DnsTlsFrontend tls; |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3932 | ASSERT_TRUE(tls.startServer()); |
| 3933 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3934 | // The resolver will adjust the timeout value to 1000ms since the value is too small. |
| 3935 | ScopedSystemProperties scopedSystemProperties(kDotConnectTimeoutMsFlag, "100"); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3936 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3937 | // Set up resolver to opportunistic mode with the default configuration. |
Mike Yu | 8ac6340 | 2019-12-02 15:28:38 +0800 | [diff] [blame] | 3938 | const ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3939 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3940 | EXPECT_TRUE(WaitForPrivateDnsValidation(tls.listen_address(), true)); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3941 | EXPECT_TRUE(tls.waitForQueries(1)); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3942 | tls.clearQueries(); |
Bernie Innocenti | 0ad80e9 | 2020-01-23 22:20:44 +0900 | [diff] [blame] | 3943 | dns.clearQueries(); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3944 | |
| 3945 | // The server becomes unresponsive to the handshake request. |
| 3946 | tls.setHangOnHandshakeForTesting(true); |
| 3947 | |
| 3948 | // Expect the things happening in getaddrinfo(): |
| 3949 | // 1. Connect to the private DNS server. |
| 3950 | // 2. SSL handshake times out. |
| 3951 | // 3. Fallback to UDP transport, and then get the answer. |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3952 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 3953 | auto [result, timeTakenMs] = safe_getaddrinfo_time_taken(hostname1, nullptr, hints); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3954 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3955 | EXPECT_NE(nullptr, result); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3956 | EXPECT_EQ(0, tls.queries()); |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3957 | EXPECT_EQ(1U, GetNumQueries(dns, hostname1)); |
| 3958 | EXPECT_EQ(records.at(0).addr, ToString(result)); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3959 | |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3960 | // A loose upper bound is set by adding 2000ms buffer time. Theoretically, getaddrinfo() |
| 3961 | // should just take a bit more than expetTimeout milliseconds. |
| 3962 | EXPECT_GE(timeTakenMs, expectedTimeout); |
| 3963 | EXPECT_LE(timeTakenMs, expectedTimeout + 2000); |
| 3964 | |
| 3965 | // Set the server to be responsive. Verify that the resolver will attempt to reconnect |
| 3966 | // to the server and then get the result within the timeout. |
| 3967 | tls.setHangOnHandshakeForTesting(false); |
| 3968 | std::tie(result, timeTakenMs) = safe_getaddrinfo_time_taken(hostname2, nullptr, hints); |
| 3969 | |
| 3970 | EXPECT_NE(nullptr, result); |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 3971 | EXPECT_TRUE(tls.waitForQueries(1)); |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 3972 | EXPECT_EQ(1U, GetNumQueries(dns, hostname2)); |
| 3973 | EXPECT_EQ(records.at(1).addr, ToString(result)); |
| 3974 | |
| 3975 | EXPECT_LE(timeTakenMs, expectedTimeout); |
Mike Yu | a772c20 | 2019-09-23 17:47:21 +0800 | [diff] [blame] | 3976 | } |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 3977 | |
Ken Chen | 766feae | 2019-10-30 15:13:44 +0800 | [diff] [blame] | 3978 | TEST_F(ResolverTest, FlushNetworkCache) { |
Luke Huang | 0b5a76c | 2019-11-23 03:00:00 +0800 | [diff] [blame] | 3979 | SKIP_IF_REMOTE_VERSION_LESS_THAN(mDnsClient.resolvService(), 4); |
Ken Chen | 766feae | 2019-10-30 15:13:44 +0800 | [diff] [blame] | 3980 | test::DNSResponder dns; |
| 3981 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, kHelloExampleComAddrV4}}); |
| 3982 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 3983 | |
| 3984 | const hostent* result = gethostbyname("hello"); |
| 3985 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, kHelloExampleCom)); |
| 3986 | |
| 3987 | // get result from cache |
| 3988 | result = gethostbyname("hello"); |
| 3989 | EXPECT_EQ(1U, GetNumQueriesForType(dns, ns_type::ns_t_a, kHelloExampleCom)); |
| 3990 | |
| 3991 | EXPECT_TRUE(mDnsClient.resolvService()->flushNetworkCache(TEST_NETID).isOk()); |
| 3992 | |
| 3993 | result = gethostbyname("hello"); |
| 3994 | EXPECT_EQ(2U, GetNumQueriesForType(dns, ns_type::ns_t_a, kHelloExampleCom)); |
| 3995 | } |
| 3996 | |
| 3997 | TEST_F(ResolverTest, FlushNetworkCache_random) { |
Luke Huang | 0b5a76c | 2019-11-23 03:00:00 +0800 | [diff] [blame] | 3998 | SKIP_IF_REMOTE_VERSION_LESS_THAN(mDnsClient.resolvService(), 4); |
Ken Chen | 766feae | 2019-10-30 15:13:44 +0800 | [diff] [blame] | 3999 | constexpr int num_flush = 10; |
| 4000 | constexpr int num_queries = 20; |
| 4001 | test::DNSResponder dns; |
| 4002 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, kHelloExampleComAddrV4}}); |
| 4003 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 4004 | const addrinfo hints = {.ai_family = AF_INET}; |
| 4005 | |
| 4006 | std::thread t([this]() { |
| 4007 | for (int i = 0; i < num_flush; ++i) { |
| 4008 | unsigned delay = arc4random_uniform(10 * 1000); // 10ms |
| 4009 | usleep(delay); |
| 4010 | EXPECT_TRUE(mDnsClient.resolvService()->flushNetworkCache(TEST_NETID).isOk()); |
| 4011 | } |
| 4012 | }); |
| 4013 | |
| 4014 | for (int i = 0; i < num_queries; ++i) { |
| 4015 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4016 | EXPECT_TRUE(result != nullptr); |
| 4017 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4018 | } |
| 4019 | t.join(); |
| 4020 | } |
| 4021 | |
| 4022 | // flush cache while one query is wait-for-response, another is pending. |
| 4023 | TEST_F(ResolverTest, FlushNetworkCache_concurrent) { |
Luke Huang | 0b5a76c | 2019-11-23 03:00:00 +0800 | [diff] [blame] | 4024 | SKIP_IF_REMOTE_VERSION_LESS_THAN(mDnsClient.resolvService(), 4); |
Ken Chen | 766feae | 2019-10-30 15:13:44 +0800 | [diff] [blame] | 4025 | const char* listen_addr1 = "127.0.0.9"; |
| 4026 | const char* listen_addr2 = "127.0.0.10"; |
| 4027 | test::DNSResponder dns1(listen_addr1); |
| 4028 | test::DNSResponder dns2(listen_addr2); |
| 4029 | StartDns(dns1, {{kHelloExampleCom, ns_type::ns_t_a, kHelloExampleComAddrV4}}); |
| 4030 | StartDns(dns2, {{kHelloExampleCom, ns_type::ns_t_a, kHelloExampleComAddrV4}}); |
| 4031 | addrinfo hints = {.ai_family = AF_INET}; |
| 4032 | |
| 4033 | // step 1: set server#1 into deferred responding mode |
| 4034 | dns1.setDeferredResp(true); |
| 4035 | std::thread t1([&listen_addr1, &hints, this]() { |
| 4036 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr1})); |
| 4037 | // step 3: query |
| 4038 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4039 | // step 9: check result |
| 4040 | EXPECT_TRUE(result != nullptr); |
| 4041 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4042 | }); |
| 4043 | |
| 4044 | // step 2: wait for the query to reach the server |
| 4045 | while (GetNumQueries(dns1, kHelloExampleCom) == 0) { |
| 4046 | usleep(1000); // 1ms |
| 4047 | } |
| 4048 | |
| 4049 | std::thread t2([&listen_addr2, &hints, &dns2, this]() { |
| 4050 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr2})); |
| 4051 | // step 5: query (should be blocked in resolver) |
| 4052 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4053 | // step 7: check result |
| 4054 | EXPECT_TRUE(result != nullptr); |
| 4055 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4056 | EXPECT_EQ(1U, GetNumQueriesForType(dns2, ns_type::ns_t_a, kHelloExampleCom)); |
| 4057 | }); |
| 4058 | |
| 4059 | // step 4: wait a bit for the 2nd query to enter pending state |
| 4060 | usleep(100 * 1000); // 100ms |
| 4061 | // step 6: flush cache (will unblock pending queries) |
| 4062 | EXPECT_TRUE(mDnsClient.resolvService()->flushNetworkCache(TEST_NETID).isOk()); |
| 4063 | t2.join(); |
| 4064 | |
| 4065 | // step 8: resume server#1 |
| 4066 | dns1.setDeferredResp(false); |
| 4067 | t1.join(); |
| 4068 | |
| 4069 | // step 10: verify if result is correctly cached |
| 4070 | dns2.clearQueries(); |
| 4071 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4072 | EXPECT_EQ(0U, GetNumQueries(dns2, kHelloExampleCom)); |
| 4073 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4074 | } |
| 4075 | |
waynema | 2925305 | 2019-08-20 11:26:08 +0800 | [diff] [blame] | 4076 | // TODO: Perhaps to have a boundary conditions test for TCP and UDP. |
| 4077 | TEST_F(ResolverTest, TcpQueryWithOversizePayload) { |
| 4078 | test::DNSResponder dns; |
| 4079 | StartDns(dns, {{kHelloExampleCom, ns_type::ns_t_a, kHelloExampleComAddrV4}}); |
| 4080 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 4081 | |
| 4082 | int fd = dns_open_proxy(); |
| 4083 | ASSERT_TRUE(fd > 0); |
| 4084 | |
| 4085 | // Sending DNS query over TCP once the packet sizes exceed 512 bytes. |
| 4086 | // The raw data is combined with Question section and Additional section |
| 4087 | // Question section : query "hello.example.com", type A, class IN |
| 4088 | // Additional section : type OPT (41), Option PADDING, Option Length 546 |
| 4089 | // Padding option which allows DNS clients and servers to artificially |
| 4090 | // increase the size of a DNS message by a variable number of bytes. |
| 4091 | // See also RFC7830, section 3 |
| 4092 | const std::string query = |
| 4093 | "+c0BAAABAAAAAAABBWhlbGxvB2V4YW1wbGUDY29tAAABAAEAACkgAAAAgAACJgAMAiIAAAAAAAAAAAAAAAAAA" |
| 4094 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4095 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4096 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4097 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4098 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4099 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4100 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4101 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA" |
| 4102 | "AAAAAAAAAAAAAAAAAAAAAAAAAAAAAA="; |
| 4103 | const std::string cmd = |
| 4104 | "resnsend " + std::to_string(TEST_NETID) + " 0 " /* ResNsendFlags */ + query + '\0'; |
| 4105 | ssize_t rc = TEMP_FAILURE_RETRY(write(fd, cmd.c_str(), cmd.size())); |
| 4106 | EXPECT_EQ(rc, static_cast<ssize_t>(cmd.size())); |
| 4107 | expectAnswersValid(fd, AF_INET, kHelloExampleComAddrV4); |
| 4108 | EXPECT_EQ(1U, GetNumQueriesForProtocol(dns, IPPROTO_TCP, kHelloExampleCom)); |
| 4109 | EXPECT_EQ(0U, GetNumQueriesForProtocol(dns, IPPROTO_UDP, kHelloExampleCom)); |
| 4110 | } |
| 4111 | |
Ken Chen | 9934488 | 2020-01-01 14:59:38 +0800 | [diff] [blame] | 4112 | TEST_F(ResolverTest, TruncatedRspMode) { |
| 4113 | constexpr char listen_addr[] = "127.0.0.4"; |
| 4114 | constexpr char listen_addr2[] = "127.0.0.5"; |
| 4115 | constexpr char listen_srv[] = "53"; |
| 4116 | |
| 4117 | test::DNSResponder dns(listen_addr, listen_srv, static_cast<ns_rcode>(-1)); |
| 4118 | test::DNSResponder dns2(listen_addr2, listen_srv, static_cast<ns_rcode>(-1)); |
| 4119 | // dns supports UDP only, dns2 support UDP and TCP |
| 4120 | dns.setResponseProbability(0.0, IPPROTO_TCP); |
| 4121 | StartDns(dns, kLargeCnameChainRecords); |
| 4122 | StartDns(dns2, kLargeCnameChainRecords); |
| 4123 | |
| 4124 | const struct TestConfig { |
| 4125 | const std::optional<int32_t> tcMode; |
| 4126 | const bool ret; |
| 4127 | const unsigned numQueries; |
| 4128 | std::string asParameters() const { |
| 4129 | return StringPrintf("tcMode: %d, ret: %s, numQueries: %u", tcMode.value_or(-1), |
| 4130 | ret ? "true" : "false", numQueries); |
| 4131 | } |
| 4132 | } testConfigs[]{ |
| 4133 | // clang-format off |
| 4134 | {std::nullopt, true, 0}, /* mode unset */ |
| 4135 | {aidl::android::net::IDnsResolver::TC_MODE_DEFAULT, true, 0}, /* default mode */ |
| 4136 | {aidl::android::net::IDnsResolver::TC_MODE_UDP_TCP, true, 1}, /* alternative mode */ |
| 4137 | {-666, false, 1}, /* invalid input */ |
| 4138 | // clang-format on |
| 4139 | }; |
| 4140 | |
| 4141 | for (const auto& config : testConfigs) { |
| 4142 | SCOPED_TRACE(config.asParameters()); |
| 4143 | |
| 4144 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4145 | parcel.servers = {listen_addr, listen_addr2}; |
| 4146 | if (config.tcMode) { |
Ken Chen | 0542081 | 2020-04-07 18:58:38 +0000 | [diff] [blame] | 4147 | parcel.resolverOptions.tcMode = config.tcMode.value(); |
Ken Chen | 9934488 | 2020-01-01 14:59:38 +0800 | [diff] [blame] | 4148 | } |
| 4149 | ASSERT_EQ(mDnsClient.resolvService()->setResolverConfiguration(parcel).isOk(), config.ret); |
| 4150 | |
| 4151 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 4152 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4153 | ASSERT_TRUE(result != nullptr); |
| 4154 | EXPECT_EQ(ToString(result), kHelloExampleComAddrV4); |
| 4155 | // TC_MODE_DEFAULT: resolver retries on TCP-only on each name server. |
| 4156 | // TC_MODE_UDP_TCP: resolver retries on TCP on the same server, falls back to UDP from next. |
| 4157 | ASSERT_EQ(GetNumQueriesForProtocol(dns, IPPROTO_UDP, kHelloExampleCom), 1U); |
| 4158 | ASSERT_EQ(GetNumQueriesForProtocol(dns, IPPROTO_TCP, kHelloExampleCom), 1U); |
| 4159 | ASSERT_EQ(GetNumQueriesForProtocol(dns2, IPPROTO_UDP, kHelloExampleCom), config.numQueries); |
| 4160 | ASSERT_EQ(GetNumQueriesForProtocol(dns2, IPPROTO_TCP, kHelloExampleCom), 1U); |
| 4161 | |
| 4162 | dns.clearQueries(); |
| 4163 | dns2.clearQueries(); |
| 4164 | ASSERT_TRUE(mDnsClient.resolvService()->flushNetworkCache(TEST_NETID).isOk()); |
| 4165 | } |
| 4166 | } |
| 4167 | |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4168 | TEST_F(ResolverTest, RepeatedSetup_ResolverStatusRemains) { |
| 4169 | constexpr char unusable_listen_addr[] = "127.0.0.3"; |
| 4170 | constexpr char listen_addr[] = "127.0.0.4"; |
| 4171 | constexpr char hostname[] = "a.hello.query."; |
| 4172 | const auto repeatedSetResolversFromParcel = [&](const ResolverParamsParcel& parcel) { |
| 4173 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4174 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4175 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4176 | }; |
| 4177 | |
| 4178 | test::DNSResponder dns(listen_addr); |
| 4179 | StartDns(dns, {{hostname, ns_type::ns_t_a, "1.2.3.3"}}); |
| 4180 | test::DnsTlsFrontend tls1(listen_addr, "853", listen_addr, "53"); |
| 4181 | ASSERT_TRUE(tls1.startServer()); |
| 4182 | |
| 4183 | // Private DNS off mode. |
| 4184 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4185 | parcel.servers = {unusable_listen_addr, listen_addr}; |
| 4186 | parcel.tlsServers.clear(); |
| 4187 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4188 | |
| 4189 | // Send a query. |
| 4190 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 4191 | EXPECT_NE(safe_getaddrinfo(hostname, nullptr, &hints), nullptr); |
| 4192 | |
| 4193 | // Check the stats as expected. |
| 4194 | const std::vector<NameserverStats> expectedCleartextDnsStats = { |
| 4195 | NameserverStats(unusable_listen_addr).setInternalErrors(1), |
| 4196 | NameserverStats(listen_addr).setSuccesses(1), |
| 4197 | }; |
| 4198 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
| 4199 | EXPECT_EQ(GetNumQueries(dns, hostname), 1U); |
| 4200 | |
| 4201 | // The stats is supposed to remain as long as the list of cleartext DNS servers is unchanged. |
| 4202 | static const struct TestConfig { |
| 4203 | std::vector<std::string> servers; |
| 4204 | std::vector<std::string> tlsServers; |
| 4205 | std::string tlsName; |
| 4206 | } testConfigs[] = { |
| 4207 | // Private DNS opportunistic mode. |
| 4208 | {{listen_addr, unusable_listen_addr}, {listen_addr, unusable_listen_addr}, ""}, |
| 4209 | {{unusable_listen_addr, listen_addr}, {unusable_listen_addr, listen_addr}, ""}, |
| 4210 | |
| 4211 | // Private DNS strict mode. |
| 4212 | {{listen_addr, unusable_listen_addr}, {"127.0.0.100"}, kDefaultPrivateDnsHostName}, |
| 4213 | {{unusable_listen_addr, listen_addr}, {"127.0.0.100"}, kDefaultPrivateDnsHostName}, |
| 4214 | |
| 4215 | // Private DNS off mode. |
| 4216 | {{unusable_listen_addr, listen_addr}, {}, ""}, |
| 4217 | {{listen_addr, unusable_listen_addr}, {}, ""}, |
| 4218 | }; |
| 4219 | |
| 4220 | for (const auto& config : testConfigs) { |
| 4221 | SCOPED_TRACE(fmt::format("testConfig: [{}] [{}] [{}]", fmt::join(config.servers, ","), |
| 4222 | fmt::join(config.tlsServers, ","), config.tlsName)); |
| 4223 | parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4224 | parcel.servers = config.servers; |
| 4225 | parcel.tlsServers = config.tlsServers; |
| 4226 | parcel.tlsName = config.tlsName; |
| 4227 | repeatedSetResolversFromParcel(parcel); |
| 4228 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
| 4229 | |
| 4230 | // The stats remains when the list of search domains changes. |
| 4231 | parcel.domains.push_back("tmp.domains"); |
| 4232 | repeatedSetResolversFromParcel(parcel); |
| 4233 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
| 4234 | |
| 4235 | // The stats remains when the parameters change (except maxSamples). |
| 4236 | parcel.sampleValiditySeconds++; |
| 4237 | parcel.successThreshold++; |
| 4238 | parcel.minSamples++; |
| 4239 | parcel.baseTimeoutMsec++; |
| 4240 | parcel.retryCount++; |
| 4241 | repeatedSetResolversFromParcel(parcel); |
| 4242 | EXPECT_TRUE(expectStatsFromGetResolverInfo(expectedCleartextDnsStats)); |
| 4243 | } |
| 4244 | |
| 4245 | // The cache remains. |
| 4246 | EXPECT_NE(safe_getaddrinfo(hostname, nullptr, &hints), nullptr); |
| 4247 | EXPECT_EQ(GetNumQueries(dns, hostname), 1U); |
| 4248 | } |
| 4249 | |
| 4250 | TEST_F(ResolverTest, RepeatedSetup_NoRedundantPrivateDnsValidation) { |
| 4251 | const std::string addr1 = getUniqueIPv4Address(); // For a workable DNS server. |
| 4252 | const std::string addr2 = getUniqueIPv4Address(); // For an unresponsive DNS server. |
| 4253 | const std::string unusable_addr = getUniqueIPv4Address(); |
Mike Yu | 1ec523a | 2020-03-20 12:22:24 +0000 | [diff] [blame] | 4254 | const auto waitForPrivateDnsStateUpdated = []() { |
| 4255 | // A buffer time for the PrivateDnsConfiguration instance to update its map, |
| 4256 | // mPrivateDnsValidateThreads, which is used for tracking validation threads. |
| 4257 | // Since there is a time gap between when PrivateDnsConfiguration reports |
| 4258 | // onPrivateDnsValidationEvent and when PrivateDnsConfiguration updates the map, this is a |
| 4259 | // workaround to avoid the test starts a subsequent resolver setup during the time gap. |
| 4260 | // TODO: Report onPrivateDnsValidationEvent after all the relevant updates are complete. |
| 4261 | // Reference to b/152009023. |
| 4262 | std::this_thread::sleep_for(20ms); |
| 4263 | }; |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4264 | |
| 4265 | test::DNSResponder dns1(addr1); |
| 4266 | test::DNSResponder dns2(addr2); |
| 4267 | StartDns(dns1, {}); |
| 4268 | StartDns(dns2, {}); |
| 4269 | test::DnsTlsFrontend workableTls(addr1, "853", addr1, "53"); |
| 4270 | test::DnsTlsFrontend unresponsiveTls(addr2, "853", addr2, "53"); |
| 4271 | unresponsiveTls.setHangOnHandshakeForTesting(true); |
| 4272 | ASSERT_TRUE(workableTls.startServer()); |
| 4273 | ASSERT_TRUE(unresponsiveTls.startServer()); |
| 4274 | |
| 4275 | // First setup. |
| 4276 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4277 | parcel.servers = {addr1, addr2, unusable_addr}; |
| 4278 | parcel.tlsServers = {addr1, addr2, unusable_addr}; |
| 4279 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4280 | |
| 4281 | // Check the validation results. |
| 4282 | EXPECT_TRUE(WaitForPrivateDnsValidation(workableTls.listen_address(), true)); |
| 4283 | EXPECT_TRUE(WaitForPrivateDnsValidation(unusable_addr, false)); |
| 4284 | EXPECT_EQ(unresponsiveTls.acceptConnectionsCount(), 1); // The validation is still in progress. |
| 4285 | |
| 4286 | static const struct TestConfig { |
| 4287 | std::vector<std::string> tlsServers; |
| 4288 | std::string tlsName; |
| 4289 | } testConfigs[] = { |
| 4290 | {{addr1, addr2, unusable_addr}, ""}, |
| 4291 | {{unusable_addr, addr1, addr2}, ""}, |
| 4292 | {{unusable_addr, addr1, addr2}, kDefaultPrivateDnsHostName}, |
| 4293 | {{addr1, addr2, unusable_addr}, kDefaultPrivateDnsHostName}, |
| 4294 | }; |
| 4295 | |
| 4296 | std::string TlsNameLastTime; |
| 4297 | for (const auto& config : testConfigs) { |
| 4298 | SCOPED_TRACE(fmt::format("testConfig: [{}] [{}]", fmt::join(config.tlsServers, ","), |
| 4299 | config.tlsName)); |
| 4300 | parcel.servers = config.tlsServers; |
| 4301 | parcel.tlsServers = config.tlsServers; |
| 4302 | parcel.tlsName = config.tlsName; |
| 4303 | parcel.caCertificate = config.tlsName.empty() ? "" : kCaCert; |
| 4304 | |
| 4305 | const bool dnsModeChanged = (TlsNameLastTime != config.tlsName); |
Mike Yu | 1ec523a | 2020-03-20 12:22:24 +0000 | [diff] [blame] | 4306 | |
| 4307 | waitForPrivateDnsStateUpdated(); |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4308 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4309 | |
| 4310 | for (const auto& serverAddr : parcel.tlsServers) { |
| 4311 | SCOPED_TRACE(serverAddr); |
| 4312 | if (serverAddr == workableTls.listen_address()) { |
| 4313 | if (dnsModeChanged) { |
| 4314 | // In despite of the identical IP address, the server is regarded as a different |
| 4315 | // server when DnsTlsServer.name is different. The resolver treats it as a |
| 4316 | // different object and begins the validation process. |
| 4317 | EXPECT_TRUE(WaitForPrivateDnsValidation(serverAddr, true)); |
| 4318 | } |
| 4319 | } else if (serverAddr == unresponsiveTls.listen_address()) { |
| 4320 | // No revalidation needed for the server which have been marked as in_progesss. |
| 4321 | } else { |
| 4322 | // Must be unusable_addr. |
| 4323 | // In opportunistic mode, when a validation for a private DNS server fails, the |
| 4324 | // resolver just marks the server as failed and doesn't re-evaluate it, but the |
| 4325 | // server can be re-evaluated when setResolverConfiguration() is called. |
| 4326 | // However, in strict mode, the resolver automatically re-evaluates the server and |
| 4327 | // marks the server as in_progress until the validation succeeds, so repeated setup |
| 4328 | // makes no effect. |
| 4329 | if (dnsModeChanged || config.tlsName.empty() /* not in strict mode */) { |
| 4330 | EXPECT_TRUE(WaitForPrivateDnsValidation(serverAddr, false)); |
| 4331 | } |
| 4332 | } |
| 4333 | } |
| 4334 | |
| 4335 | // Repeated setups make no effect in strict mode. |
Mike Yu | 1ec523a | 2020-03-20 12:22:24 +0000 | [diff] [blame] | 4336 | waitForPrivateDnsStateUpdated(); |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4337 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4338 | if (config.tlsName.empty()) { |
| 4339 | EXPECT_TRUE(WaitForPrivateDnsValidation(unusable_addr, false)); |
| 4340 | } |
Mike Yu | 1ec523a | 2020-03-20 12:22:24 +0000 | [diff] [blame] | 4341 | waitForPrivateDnsStateUpdated(); |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4342 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4343 | if (config.tlsName.empty()) { |
| 4344 | EXPECT_TRUE(WaitForPrivateDnsValidation(unusable_addr, false)); |
| 4345 | } |
| 4346 | |
| 4347 | EXPECT_EQ(unresponsiveTls.acceptConnectionsCount(), 1); |
| 4348 | |
| 4349 | TlsNameLastTime = config.tlsName; |
| 4350 | } |
| 4351 | |
| 4352 | // Check that all the validation results are caught. |
| 4353 | // Note: it doesn't mean no validation being in progress. |
| 4354 | EXPECT_FALSE(hasUncaughtPrivateDnsValidation(addr1)); |
| 4355 | EXPECT_FALSE(hasUncaughtPrivateDnsValidation(addr2)); |
| 4356 | EXPECT_FALSE(hasUncaughtPrivateDnsValidation(unusable_addr)); |
| 4357 | } |
| 4358 | |
| 4359 | TEST_F(ResolverTest, RepeatedSetup_KeepChangingPrivateDnsServers) { |
| 4360 | enum TlsServerState { WORKING, UNSUPPORTED, UNRESPONSIVE }; |
| 4361 | const std::string addr1 = getUniqueIPv4Address(); |
| 4362 | const std::string addr2 = getUniqueIPv4Address(); |
Mike Yu | bad95cf | 2020-03-26 03:19:38 +0000 | [diff] [blame] | 4363 | const auto waitForPrivateDnsStateUpdated = []() { |
| 4364 | // A buffer time for PrivateDnsConfiguration to update its state. It prevents this test |
| 4365 | // being flaky. See b/152009023 for the reason. |
| 4366 | std::this_thread::sleep_for(20ms); |
| 4367 | }; |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4368 | |
| 4369 | test::DNSResponder dns1(addr1); |
| 4370 | test::DNSResponder dns2(addr2); |
| 4371 | StartDns(dns1, {}); |
| 4372 | StartDns(dns2, {}); |
| 4373 | test::DnsTlsFrontend tls1(addr1, "853", addr1, "53"); |
| 4374 | test::DnsTlsFrontend tls2(addr2, "853", addr2, "53"); |
| 4375 | ASSERT_TRUE(tls1.startServer()); |
| 4376 | ASSERT_TRUE(tls2.startServer()); |
| 4377 | |
| 4378 | static const struct TestConfig { |
| 4379 | std::string tlsServer; |
| 4380 | std::string tlsName; |
| 4381 | bool expectNothingHappenWhenServerUnsupported; |
| 4382 | bool expectNothingHappenWhenServerUnresponsive; |
| 4383 | std::string asTestName() const { |
| 4384 | return fmt::format("{}, {}, {}, {}", tlsServer, tlsName, |
| 4385 | expectNothingHappenWhenServerUnsupported, |
| 4386 | expectNothingHappenWhenServerUnresponsive); |
| 4387 | } |
| 4388 | } testConfigs[] = { |
| 4389 | {{addr1}, "", false, false}, |
| 4390 | {{addr2}, "", false, false}, |
| 4391 | {{addr1}, "", false, true}, |
| 4392 | {{addr2}, "", false, true}, |
| 4393 | {{addr1}, kDefaultPrivateDnsHostName, false, true}, |
| 4394 | {{addr2}, kDefaultPrivateDnsHostName, false, true}, |
| 4395 | {{addr1}, kDefaultPrivateDnsHostName, true, true}, |
| 4396 | {{addr2}, kDefaultPrivateDnsHostName, true, true}, |
| 4397 | |
| 4398 | // There's no new validation to start because there are already two validation threads |
| 4399 | // running (one is for addr1, the other is for addr2). This is because the comparator |
| 4400 | // doesn't compare DnsTlsServer.name. Keep the design as-is until it's known to be |
| 4401 | // harmful. |
| 4402 | {{addr1}, "", true, true}, |
| 4403 | {{addr2}, "", true, true}, |
| 4404 | {{addr1}, "", true, true}, |
| 4405 | {{addr2}, "", true, true}, |
| 4406 | }; |
| 4407 | |
| 4408 | for (const auto& serverState : {WORKING, UNSUPPORTED, UNRESPONSIVE}) { |
| 4409 | int testIndex = 0; |
| 4410 | for (const auto& config : testConfigs) { |
| 4411 | SCOPED_TRACE(fmt::format("serverState:{} testIndex:{} testConfig:[{}]", serverState, |
| 4412 | testIndex++, config.asTestName())); |
| 4413 | auto& tls = (config.tlsServer == addr1) ? tls1 : tls2; |
| 4414 | |
| 4415 | if (serverState == UNSUPPORTED && tls.running()) ASSERT_TRUE(tls.stopServer()); |
| 4416 | if (serverState != UNSUPPORTED && !tls.running()) ASSERT_TRUE(tls.startServer()); |
| 4417 | |
| 4418 | tls.setHangOnHandshakeForTesting(serverState == UNRESPONSIVE); |
| 4419 | const int connectCountsBefore = tls.acceptConnectionsCount(); |
| 4420 | |
Mike Yu | bad95cf | 2020-03-26 03:19:38 +0000 | [diff] [blame] | 4421 | waitForPrivateDnsStateUpdated(); |
Mike Yu | c000025 | 2020-03-19 07:14:23 +0000 | [diff] [blame] | 4422 | ResolverParamsParcel parcel = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4423 | parcel.servers = {config.tlsServer}; |
| 4424 | parcel.tlsServers = {config.tlsServer}; |
| 4425 | parcel.tlsName = config.tlsName; |
| 4426 | parcel.caCertificate = config.tlsName.empty() ? "" : kCaCert; |
| 4427 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(parcel)); |
| 4428 | |
| 4429 | if (serverState == WORKING) { |
| 4430 | EXPECT_TRUE(WaitForPrivateDnsValidation(config.tlsServer, true)); |
| 4431 | } else if (serverState == UNSUPPORTED) { |
| 4432 | if (config.expectNothingHappenWhenServerUnsupported) { |
| 4433 | // It's possible that the resolver hasn't yet started to |
| 4434 | // connect. Wait a while. |
| 4435 | // TODO: See if we can get rid of the hard waiting time, such as comparing |
| 4436 | // the CountDiff across two tests. |
| 4437 | std::this_thread::sleep_for(100ms); |
| 4438 | EXPECT_EQ(tls.acceptConnectionsCount(), connectCountsBefore); |
| 4439 | } else { |
| 4440 | EXPECT_TRUE(WaitForPrivateDnsValidation(config.tlsServer, false)); |
| 4441 | } |
| 4442 | } else { |
| 4443 | // Must be UNRESPONSIVE. |
| 4444 | // DnsTlsFrontend is the only signal for checking whether or not the resolver starts |
| 4445 | // another validation when the server is unresponsive. |
| 4446 | const int expectCountDiff = |
| 4447 | config.expectNothingHappenWhenServerUnresponsive ? 0 : 1; |
| 4448 | if (expectCountDiff == 0) { |
| 4449 | // It's possible that the resolver hasn't yet started to |
| 4450 | // connect. Wait a while. |
| 4451 | std::this_thread::sleep_for(100ms); |
| 4452 | } |
| 4453 | const auto condition = [&]() { |
| 4454 | return tls.acceptConnectionsCount() == connectCountsBefore + expectCountDiff; |
| 4455 | }; |
| 4456 | EXPECT_TRUE(PollForCondition(condition)); |
| 4457 | } |
| 4458 | } |
| 4459 | |
| 4460 | // Set to off mode to reset the PrivateDnsConfiguration state. |
| 4461 | ResolverParamsParcel setupOffmode = DnsResponderClient::GetDefaultResolverParamsParcel(); |
| 4462 | setupOffmode.tlsServers.clear(); |
| 4463 | ASSERT_TRUE(mDnsClient.SetResolversFromParcel(setupOffmode)); |
| 4464 | } |
| 4465 | |
| 4466 | // Check that all the validation results are caught. |
| 4467 | // Note: it doesn't mean no validation being in progress. |
| 4468 | EXPECT_FALSE(hasUncaughtPrivateDnsValidation(addr1)); |
| 4469 | EXPECT_FALSE(hasUncaughtPrivateDnsValidation(addr2)); |
| 4470 | } |
| 4471 | |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4472 | // Parameterized tests. |
| 4473 | // TODO: Merge the existing tests as parameterized test if possible. |
| 4474 | // TODO: Perhaps move parameterized tests to an independent file. |
| 4475 | enum class CallType { GETADDRINFO, GETHOSTBYNAME }; |
| 4476 | class ResolverParameterizedTest : public ResolverTest, |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4477 | public testing::WithParamInterface<CallType> { |
| 4478 | protected: |
Hungming Chen | 22617fd | 2019-12-06 12:15:45 +0800 | [diff] [blame] | 4479 | void VerifyQueryHelloExampleComV4(const test::DNSResponder& dns, const CallType calltype, |
| 4480 | const bool verifyNumQueries = true) { |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4481 | if (calltype == CallType::GETADDRINFO) { |
| 4482 | const addrinfo hints = {.ai_family = AF_INET, .ai_socktype = SOCK_DGRAM}; |
| 4483 | ScopedAddrinfo result = safe_getaddrinfo("hello", nullptr, &hints); |
| 4484 | ASSERT_TRUE(result != nullptr); |
| 4485 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4486 | } else if (calltype == CallType::GETHOSTBYNAME) { |
| 4487 | const hostent* result = gethostbyname("hello"); |
| 4488 | ASSERT_TRUE(result != nullptr); |
| 4489 | ASSERT_EQ(4, result->h_length); |
| 4490 | ASSERT_FALSE(result->h_addr_list[0] == nullptr); |
| 4491 | EXPECT_EQ(kHelloExampleComAddrV4, ToString(result)); |
| 4492 | EXPECT_TRUE(result->h_addr_list[1] == nullptr); |
| 4493 | } else { |
| 4494 | FAIL() << "Unsupported call type: " << static_cast<uint32_t>(calltype); |
| 4495 | } |
Hungming Chen | 22617fd | 2019-12-06 12:15:45 +0800 | [diff] [blame] | 4496 | if (verifyNumQueries) EXPECT_EQ(1U, GetNumQueries(dns, kHelloExampleCom)); |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4497 | } |
| 4498 | }; |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4499 | |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4500 | INSTANTIATE_TEST_SUITE_P(QueryCallTest, ResolverParameterizedTest, |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4501 | testing::Values(CallType::GETADDRINFO, CallType::GETHOSTBYNAME), |
| 4502 | [](const testing::TestParamInfo<CallType>& info) { |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4503 | switch (info.param) { |
| 4504 | case CallType::GETADDRINFO: |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4505 | return "GetAddrInfo"; |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4506 | case CallType::GETHOSTBYNAME: |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4507 | return "GetHostByName"; |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4508 | default: |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4509 | return "InvalidParameter"; // Should not happen. |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4510 | } |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4511 | }); |
| 4512 | |
| 4513 | TEST_P(ResolverParameterizedTest, AuthoritySectionAndAdditionalSection) { |
| 4514 | // DNS response may have more information in authority section and additional section. |
| 4515 | // Currently, getanswer() of packages/modules/DnsResolver/getaddrinfo.cpp doesn't parse the |
| 4516 | // content of authority section and additional section. Test these sections if they crash |
| 4517 | // the resolver, just in case. See also RFC 1035 section 4.1. |
| 4518 | const auto& calltype = GetParam(); |
| 4519 | test::DNSHeader header(kDefaultDnsHeader); |
| 4520 | |
| 4521 | // Create a DNS response which has a authoritative nameserver record in authority |
| 4522 | // section and its relevant address record in additional section. |
| 4523 | // |
| 4524 | // Question |
| 4525 | // hello.example.com. IN A |
| 4526 | // Answer |
| 4527 | // hello.example.com. IN A 1.2.3.4 |
| 4528 | // Authority: |
| 4529 | // hello.example.com. IN NS ns1.example.com. |
| 4530 | // Additional: |
| 4531 | // ns1.example.com. IN A 5.6.7.8 |
| 4532 | // |
| 4533 | // A response may have only question, answer, and authority section. Current testing response |
| 4534 | // should be able to cover this condition. |
| 4535 | |
| 4536 | // Question section. |
| 4537 | test::DNSQuestion question{ |
| 4538 | .qname = {.name = kHelloExampleCom}, |
| 4539 | .qtype = ns_type::ns_t_a, |
| 4540 | .qclass = ns_c_in, |
| 4541 | }; |
| 4542 | header.questions.push_back(std::move(question)); |
| 4543 | |
| 4544 | // Answer section. |
| 4545 | test::DNSRecord recordAnswer{ |
| 4546 | .name = {.name = kHelloExampleCom}, |
| 4547 | .rtype = ns_type::ns_t_a, |
| 4548 | .rclass = ns_c_in, |
| 4549 | .ttl = 0, // no cache |
| 4550 | }; |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4551 | EXPECT_TRUE(test::DNSResponder::fillRdata(kHelloExampleComAddrV4, recordAnswer)); |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4552 | header.answers.push_back(std::move(recordAnswer)); |
| 4553 | |
| 4554 | // Authority section. |
| 4555 | test::DNSRecord recordAuthority{ |
| 4556 | .name = {.name = kHelloExampleCom}, |
| 4557 | .rtype = ns_type::ns_t_ns, |
| 4558 | .rclass = ns_c_in, |
| 4559 | .ttl = 0, // no cache |
| 4560 | }; |
| 4561 | EXPECT_TRUE(test::DNSResponder::fillRdata("ns1.example.com.", recordAuthority)); |
| 4562 | header.authorities.push_back(std::move(recordAuthority)); |
| 4563 | |
| 4564 | // Additional section. |
| 4565 | test::DNSRecord recordAdditional{ |
| 4566 | .name = {.name = "ns1.example.com."}, |
| 4567 | .rtype = ns_type::ns_t_a, |
| 4568 | .rclass = ns_c_in, |
| 4569 | .ttl = 0, // no cache |
| 4570 | }; |
| 4571 | EXPECT_TRUE(test::DNSResponder::fillRdata("5.6.7.8", recordAdditional)); |
| 4572 | header.additionals.push_back(std::move(recordAdditional)); |
| 4573 | |
| 4574 | // Start DNS server. |
| 4575 | test::DNSResponder dns(test::DNSResponder::MappingType::DNS_HEADER); |
| 4576 | dns.addMappingDnsHeader(kHelloExampleCom, ns_type::ns_t_a, header); |
| 4577 | ASSERT_TRUE(dns.startServer()); |
| 4578 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 4579 | dns.clearQueries(); |
| 4580 | |
| 4581 | // Expect that get the address and the resolver doesn't crash. |
Hungming Chen | 6377905 | 2019-10-30 15:06:13 +0800 | [diff] [blame] | 4582 | VerifyQueryHelloExampleComV4(dns, calltype); |
| 4583 | } |
| 4584 | |
| 4585 | TEST_P(ResolverParameterizedTest, MessageCompression) { |
| 4586 | const auto& calltype = GetParam(); |
| 4587 | |
| 4588 | // The response with compressed domain name by a pointer. See RFC 1035 section 4.1.4. |
| 4589 | // |
| 4590 | // Ignoring the other fields of the message, the domain name of question section and answer |
| 4591 | // section are presented as: |
| 4592 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4593 | // 12 | 5 | h | |
| 4594 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4595 | // 14 | e | l | |
| 4596 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4597 | // 16 | l | o | |
| 4598 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4599 | // 18 | 7 | e | |
| 4600 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4601 | // 20 | x | a | |
| 4602 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4603 | // 22 | m | p | |
| 4604 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4605 | // 24 | l | e | |
| 4606 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4607 | // 26 | 3 | c | |
| 4608 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4609 | // 28 | o | m | |
| 4610 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4611 | // 30 | 0 | ... | |
| 4612 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4613 | // |
| 4614 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4615 | // 35 | 1 1| 12 | |
| 4616 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4617 | const std::vector<uint8_t> kResponseAPointer = { |
| 4618 | /* Header */ |
| 4619 | 0x00, 0x00, /* Transaction ID: 0x0000 */ |
| 4620 | 0x81, 0x80, /* Flags: qr rd ra */ |
| 4621 | 0x00, 0x01, /* Questions: 1 */ |
| 4622 | 0x00, 0x01, /* Answer RRs: 1 */ |
| 4623 | 0x00, 0x00, /* Authority RRs: 0 */ |
| 4624 | 0x00, 0x00, /* Additional RRs: 0 */ |
| 4625 | /* Queries */ |
| 4626 | 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, |
| 4627 | 0x03, 0x63, 0x6f, 0x6d, 0x00, /* Name: hello.example.com */ |
| 4628 | 0x00, 0x01, /* Type: A */ |
| 4629 | 0x00, 0x01, /* Class: IN */ |
| 4630 | /* Answers */ |
| 4631 | 0xc0, 0x0c, /* Name: hello.example.com (a pointer) */ |
| 4632 | 0x00, 0x01, /* Type: A */ |
| 4633 | 0x00, 0x01, /* Class: IN */ |
| 4634 | 0x00, 0x00, 0x00, 0x00, /* Time to live: 0 */ |
| 4635 | 0x00, 0x04, /* Data length: 4 */ |
| 4636 | 0x01, 0x02, 0x03, 0x04 /* Address: 1.2.3.4 */ |
| 4637 | }; |
| 4638 | |
| 4639 | // The response with compressed domain name by a sequence of labels ending with a pointer. See |
| 4640 | // RFC 1035 section 4.1.4. |
| 4641 | // |
| 4642 | // Ignoring the other fields of the message, the domain name of question section and answer |
| 4643 | // section are presented as: |
| 4644 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4645 | // 12 | 5 | h | |
| 4646 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4647 | // 14 | e | l | |
| 4648 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4649 | // 16 | l | o | |
| 4650 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4651 | // 18 | 7 | e | |
| 4652 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4653 | // 20 | x | a | |
| 4654 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4655 | // 22 | m | p | |
| 4656 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4657 | // 24 | l | e | |
| 4658 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4659 | // 26 | 3 | c | |
| 4660 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4661 | // 28 | o | m | |
| 4662 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4663 | // 30 | 0 | ... | |
| 4664 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4665 | // |
| 4666 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4667 | // 35 | 5 | h | |
| 4668 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4669 | // 37 | e | l | |
| 4670 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4671 | // 39 | l | o | |
| 4672 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4673 | // 41 | 1 1| 18 | |
| 4674 | // +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ |
| 4675 | const std::vector<uint8_t> kResponseLabelEndingWithAPointer = { |
| 4676 | /* Header */ |
| 4677 | 0x00, 0x00, /* Transaction ID: 0x0000 */ |
| 4678 | 0x81, 0x80, /* Flags: qr rd ra */ |
| 4679 | 0x00, 0x01, /* Questions: 1 */ |
| 4680 | 0x00, 0x01, /* Answer RRs: 1 */ |
| 4681 | 0x00, 0x00, /* Authority RRs: 0 */ |
| 4682 | 0x00, 0x00, /* Additional RRs: 0 */ |
| 4683 | /* Queries */ |
| 4684 | 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, |
| 4685 | 0x03, 0x63, 0x6f, 0x6d, 0x00, /* Name: hello.example.com */ |
| 4686 | 0x00, 0x01, /* Type: A */ |
| 4687 | 0x00, 0x01, /* Class: IN */ |
| 4688 | /* Answers */ |
| 4689 | 0x05, 0x68, 0x65, 0x6c, 0x6c, 0x6f, 0xc0, |
| 4690 | 0x12, /* Name: hello.example.com (a label ending with a pointer) */ |
| 4691 | 0x00, 0x01, /* Type: A */ |
| 4692 | 0x00, 0x01, /* Class: IN */ |
| 4693 | 0x00, 0x00, 0x00, 0x00, /* Time to live: 0 */ |
| 4694 | 0x00, 0x04, /* Data length: 4 */ |
| 4695 | 0x01, 0x02, 0x03, 0x04 /* Address: 1.2.3.4 */ |
| 4696 | }; |
| 4697 | |
| 4698 | for (const auto& response : {kResponseAPointer, kResponseLabelEndingWithAPointer}) { |
| 4699 | SCOPED_TRACE(StringPrintf("Hex dump: %s", toHex(makeSlice(response)).c_str())); |
| 4700 | |
| 4701 | test::DNSResponder dns(test::DNSResponder::MappingType::BINARY_PACKET); |
| 4702 | dns.addMappingBinaryPacket(kHelloExampleComQueryV4, response); |
| 4703 | StartDns(dns, {}); |
| 4704 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 4705 | |
| 4706 | // Expect no cache because the TTL of testing responses are 0. |
| 4707 | VerifyQueryHelloExampleComV4(dns, calltype); |
Hungming Chen | bb90ab3 | 2019-10-28 18:20:31 +0800 | [diff] [blame] | 4708 | } |
Mike Yu | 40e6707 | 2019-10-09 21:14:09 +0800 | [diff] [blame] | 4709 | } |
Hungming Chen | 22617fd | 2019-12-06 12:15:45 +0800 | [diff] [blame] | 4710 | |
| 4711 | TEST_P(ResolverParameterizedTest, TruncatedResponse) { |
| 4712 | const auto& calltype = GetParam(); |
| 4713 | |
Hungming Chen | 22617fd | 2019-12-06 12:15:45 +0800 | [diff] [blame] | 4714 | test::DNSResponder dns; |
Ken Chen | 9934488 | 2020-01-01 14:59:38 +0800 | [diff] [blame] | 4715 | StartDns(dns, kLargeCnameChainRecords); |
Hungming Chen | 22617fd | 2019-12-06 12:15:45 +0800 | [diff] [blame] | 4716 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork()); |
| 4717 | |
| 4718 | // Expect UDP response is truncated. The resolver retries over TCP. See RFC 1035 section 4.2.1. |
| 4719 | VerifyQueryHelloExampleComV4(dns, calltype, false); |
| 4720 | EXPECT_EQ(1U, GetNumQueriesForProtocol(dns, IPPROTO_UDP, kHelloExampleCom)); |
| 4721 | EXPECT_EQ(1U, GetNumQueriesForProtocol(dns, IPPROTO_TCP, kHelloExampleCom)); |
| 4722 | } |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4723 | |
| 4724 | TEST_F(ResolverTest, KeepListeningUDP) { |
| 4725 | constexpr char listen_addr1[] = "127.0.0.4"; |
| 4726 | constexpr char listen_addr2[] = "127.0.0.5"; |
| 4727 | constexpr char host_name[] = "howdy.example.com."; |
| 4728 | const std::vector<DnsRecord> records = { |
| 4729 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 4730 | }; |
| 4731 | const std::vector<int> params = {300, 25, 8, 8, 1000 /* BASE_TIMEOUT_MSEC */, |
| 4732 | 1 /* retry count */}; |
| 4733 | const int delayTimeMs = 1500; |
| 4734 | |
| 4735 | test::DNSResponder neverRespondDns(listen_addr2, "53", static_cast<ns_rcode>(-1)); |
| 4736 | neverRespondDns.setResponseProbability(0.0); |
| 4737 | StartDns(neverRespondDns, records); |
Luke Huang | 68fa500 | 2020-04-23 15:48:47 +0000 | [diff] [blame] | 4738 | ScopedSystemProperties scopedSystemProperties( |
| 4739 | "persist.device_config.netd_native.keep_listening_udp", "1"); |
| 4740 | // Re-setup test network to make experiment flag take effect. |
| 4741 | resetNetwork(); |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4742 | |
| 4743 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr1, listen_addr2}, |
| 4744 | kDefaultSearchDomains, params)); |
| 4745 | // There are 2 DNS servers for this test. |
| 4746 | // |delayedDns| will be blocked for |delayTimeMs|, then start to respond to requests. |
| 4747 | // |neverRespondDns| will never respond. |
| 4748 | // In the first try, resolver will send query to |delayedDns| but get timeout error |
| 4749 | // because |delayTimeMs| > DNS timeout. |
| 4750 | // Then it's the second try, resolver will send query to |neverRespondDns| and |
| 4751 | // listen on both servers. Resolver will receive the answer coming from |delayedDns|. |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4752 | |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4753 | test::DNSResponder delayedDns(listen_addr1); |
| 4754 | delayedDns.setResponseDelayMs(delayTimeMs); |
| 4755 | StartDns(delayedDns, records); |
| 4756 | |
| 4757 | // Specify hints to ensure resolver doing query only 1 round. |
| 4758 | const addrinfo hints = {.ai_family = AF_INET6, .ai_socktype = SOCK_DGRAM}; |
| 4759 | ScopedAddrinfo result = safe_getaddrinfo(host_name, nullptr, &hints); |
| 4760 | EXPECT_TRUE(result != nullptr); |
| 4761 | |
| 4762 | std::string result_str = ToString(result); |
| 4763 | EXPECT_TRUE(result_str == "::1.2.3.4") << ", result_str='" << result_str << "'"; |
| 4764 | } |
| 4765 | |
| 4766 | TEST_F(ResolverTest, GetAddrInfoParallelLookupTimeout) { |
| 4767 | constexpr char listen_addr[] = "127.0.0.4"; |
| 4768 | constexpr char host_name[] = "howdy.example.com."; |
| 4769 | constexpr int TIMING_TOLERANCE_MS = 200; |
| 4770 | constexpr int DNS_TIMEOUT_MS = 1000; |
| 4771 | const std::vector<DnsRecord> records = { |
| 4772 | {host_name, ns_type::ns_t_a, "1.2.3.4"}, |
| 4773 | {host_name, ns_type::ns_t_aaaa, "::1.2.3.4"}, |
| 4774 | }; |
| 4775 | const std::vector<int> params = {300, 25, 8, 8, DNS_TIMEOUT_MS /* BASE_TIMEOUT_MSEC */, |
| 4776 | 1 /* retry count */}; |
| 4777 | test::DNSResponder neverRespondDns(listen_addr, "53", static_cast<ns_rcode>(-1)); |
| 4778 | neverRespondDns.setResponseProbability(0.0); |
| 4779 | StartDns(neverRespondDns, records); |
Luke Huang | 68fa500 | 2020-04-23 15:48:47 +0000 | [diff] [blame] | 4780 | ScopedSystemProperties scopedSystemProperties( |
| 4781 | "persist.device_config.netd_native.parallel_lookup", "1"); |
| 4782 | // Re-setup test network to make experiment flag take effect. |
| 4783 | resetNetwork(); |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4784 | |
| 4785 | ASSERT_TRUE(mDnsClient.SetResolversForNetwork({listen_addr}, kDefaultSearchDomains, params)); |
| 4786 | neverRespondDns.clearQueries(); |
| 4787 | |
Luke Huang | 3caa42b | 2020-04-23 14:18:04 +0000 | [diff] [blame] | 4788 | // Use a never respond DNS server to verify if the A/AAAA queries are sent in parallel. |
| 4789 | // The resolver parameters are set to timeout 1s and retry 1 times. |
| 4790 | // So we expect the safe_getaddrinfo_time_taken() might take ~1s to |
| 4791 | // return when parallel lookup is enabled. And the DNS server should receive 2 queries. |
| 4792 | const addrinfo hints = {.ai_family = AF_UNSPEC, .ai_socktype = SOCK_DGRAM}; |
| 4793 | auto [result, timeTakenMs] = safe_getaddrinfo_time_taken(host_name, nullptr, hints); |
| 4794 | |
| 4795 | EXPECT_TRUE(result == nullptr); |
| 4796 | EXPECT_NEAR(DNS_TIMEOUT_MS, timeTakenMs, TIMING_TOLERANCE_MS) |
| 4797 | << "took time should approximate equal timeout"; |
| 4798 | EXPECT_EQ(2U, GetNumQueries(neverRespondDns, host_name)); |
| 4799 | } |