| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #define LOG_TAG "resolv" |
| |
| #include <gtest/gtest.h> |
| |
| #include <android-base/stringprintf.h> |
| #include <arpa/inet.h> |
| #include <netdb.h> |
| #include <netdutils/InternetAddresses.h> |
| |
| #include "dns_responder.h" |
| #include "getaddrinfo.h" |
| #include "gethnamaddr.h" |
| #include "resolv_cache.h" |
| #include "stats.pb.h" |
| #include "tests/resolv_test_utils.h" |
| |
| #define NAME(variable) #variable |
| |
| namespace android { |
| namespace net { |
| |
| using android::base::StringPrintf; |
| using android::net::NetworkDnsEventReported; |
| using android::netdutils::ScopedAddrinfo; |
| |
| // Minimize class ResolverTest to be class TestBase because class TestBase doesn't need all member |
| // functions of class ResolverTest and class DnsResponderClient. |
| class TestBase : public ::testing::Test { |
| protected: |
| void SetUp() override { |
| // Create cache for test |
| resolv_create_cache_for_net(TEST_NETID); |
| } |
| void TearDown() override { |
| // Delete cache for test |
| resolv_delete_cache_for_net(TEST_NETID); |
| } |
| |
| int setResolvers() { |
| const std::vector<std::string> servers = {test::kDefaultListenAddr}; |
| const std::vector<std::string> domains = {"example.com"}; |
| const res_params params = { |
| .sample_validity = 300, |
| .success_threshold = 25, |
| .min_samples = 8, |
| .max_samples = 8, |
| .base_timeout_msec = 1000, |
| .retry_count = 2, |
| }; |
| return resolv_set_nameservers(TEST_NETID, servers, domains, params); |
| } |
| |
| const android_net_context mNetcontext = { |
| .app_netid = TEST_NETID, |
| .app_mark = MARK_UNSET, |
| .dns_netid = TEST_NETID, |
| .dns_mark = MARK_UNSET, |
| .uid = NET_CONTEXT_INVALID_UID, |
| }; |
| }; |
| |
| class ResolvGetAddrInfoTest : public TestBase {}; |
| class GetHostByNameForNetContextTest : public TestBase {}; |
| |
| TEST_F(ResolvGetAddrInfoTest, InvalidParameters) { |
| // Both null "netcontext" and null "res" of resolv_getaddrinfo() are not tested |
| // here because they are checked by assert() without returning any error number. |
| |
| // Invalid hostname and servname. |
| // Both hostname and servname are null pointers. Expect error number EAI_NONAME. |
| { |
| addrinfo* result = nullptr; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo(nullptr /*hostname*/, nullptr /*servname*/, nullptr /*hints*/, |
| &mNetcontext, &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(EAI_NONAME, rv); |
| } |
| |
| // Invalid hints. |
| // These place holders are used to test function call with unrequired parameters. |
| // The content is not important because function call returns error directly if |
| // there have any unrequired parameter. |
| char placeholder_cname[] = "invalid_cname"; |
| sockaddr placeholder_addr = {}; |
| addrinfo placeholder_next = {}; |
| static const struct TestConfig { |
| int ai_flags; |
| socklen_t ai_addrlen; |
| char* ai_canonname; |
| sockaddr* ai_addr; |
| addrinfo* ai_next; |
| |
| int expected_eai_error; |
| |
| std::string asParameters() const { |
| return StringPrintf("0x%x/%u/%s/%p/%p", ai_flags, ai_addrlen, |
| ai_canonname ? ai_canonname : "(null)", (void*)ai_addr, |
| (void*)ai_next); |
| } |
| } testConfigs[]{ |
| {0, sizeof(in_addr) /*bad*/, nullptr, nullptr, nullptr, EAI_BADHINTS}, |
| {0, 0, placeholder_cname /*bad*/, nullptr, nullptr, EAI_BADHINTS}, |
| {0, 0, nullptr, &placeholder_addr /*bad*/, nullptr, EAI_BADHINTS}, |
| {0, 0, nullptr, nullptr, &placeholder_next /*bad*/, EAI_BADHINTS}, |
| {AI_ALL /*bad*/, 0, nullptr, nullptr, nullptr, EAI_BADFLAGS}, |
| {AI_V4MAPPED_CFG /*bad*/, 0, nullptr, nullptr, nullptr, EAI_BADFLAGS}, |
| {AI_V4MAPPED /*bad*/, 0, nullptr, nullptr, nullptr, EAI_BADFLAGS}, |
| {AI_DEFAULT /*bad*/, 0, nullptr, nullptr, nullptr, EAI_BADFLAGS}, |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE(config.asParameters()); |
| |
| addrinfo* result = nullptr; |
| // In current test configuration set, ai_family, ai_protocol and ai_socktype are not |
| // checked because other fields cause hints error check failed first. |
| const addrinfo hints = { |
| .ai_flags = config.ai_flags, |
| .ai_family = AF_UNSPEC, |
| .ai_socktype = ANY, |
| .ai_protocol = ANY, |
| .ai_addrlen = config.ai_addrlen, |
| .ai_canonname = config.ai_canonname, |
| .ai_addr = config.ai_addr, |
| .ai_next = config.ai_next, |
| }; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("localhost", nullptr /*servname*/, &hints, &mNetcontext, |
| &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(config.expected_eai_error, rv); |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, InvalidParameters_Family) { |
| for (int family = 0; family < AF_MAX; ++family) { |
| if (family == AF_UNSPEC || family == AF_INET || family == AF_INET6) { |
| continue; // skip supported family |
| } |
| SCOPED_TRACE(StringPrintf("family: %d", family)); |
| |
| addrinfo* result = nullptr; |
| const addrinfo hints = { |
| .ai_family = family, // unsupported family |
| }; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("localhost", nullptr /*servname*/, &hints, &mNetcontext, |
| &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(EAI_FAMILY, rv); |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, InvalidParameters_SocketType) { |
| for (const auto& family : {AF_INET, AF_INET6, AF_UNSPEC}) { |
| for (int protocol = 0; protocol < IPPROTO_MAX; ++protocol) { |
| // Socket types which are not in explore_options. |
| for (const auto& socktype : {SOCK_RDM, SOCK_SEQPACKET, SOCK_DCCP, SOCK_PACKET}) { |
| const addrinfo hints = { |
| .ai_family = family, |
| .ai_protocol = protocol, |
| .ai_socktype = socktype, |
| }; |
| for (const char* service : {static_cast<const char*>(nullptr), // service is null |
| "80", |
| "", // empty service name |
| "ftp", |
| "65536", // out of valid port range from 0 to 65535 |
| "invalid"}) { |
| SCOPED_TRACE(StringPrintf("family: %d, socktype: %d, protocol: %d, service: %s", |
| family, socktype, protocol, |
| service ? service : "service is nullptr")); |
| addrinfo* result = nullptr; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("localhost", service, &hints, &mNetcontext, &result, |
| &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(EAI_SOCKTYPE, rv); |
| } |
| } |
| } |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, InvalidParameters_MeaningfulSocktypeAndProtocolCombination) { |
| static const int families[] = {PF_INET, PF_INET6, PF_UNSPEC}; |
| // Skip to test socket type SOCK_RAW in meaningful combination (explore_options[]) of |
| // system\netd\resolv\getaddrinfo.cpp. In explore_options[], the socket type SOCK_RAW always |
| // comes with protocol ANY which causes skipping meaningful socktype/protocol combination |
| // check. So it nerver returns error number EAI_BADHINTS which we want to test in this test |
| // case. |
| static const int socktypes[] = {SOCK_STREAM, SOCK_DGRAM}; |
| |
| // If both socktype/protocol are specified, check non-meaningful combination returns |
| // expected error number EAI_BADHINTS. See meaningful combination in explore_options[] of |
| // system\netd\resolv\getaddrinfo.cpp. |
| for (const auto& family : families) { |
| for (const auto& socktype : socktypes) { |
| for (int protocol = 0; protocol < IPPROTO_MAX; ++protocol) { |
| SCOPED_TRACE(StringPrintf("family: %d, socktype: %d, protocol: %d", family, |
| socktype, protocol)); |
| |
| // Both socktype/protocol need to be specified. |
| if (!socktype || !protocol) continue; |
| |
| // Skip meaningful combination in explore_options[] of |
| // system\netd\resolv\getaddrinfo.cpp. |
| if ((family == AF_INET6 && socktype == SOCK_DGRAM && protocol == IPPROTO_UDP) || |
| (family == AF_INET6 && socktype == SOCK_STREAM && protocol == IPPROTO_TCP) || |
| (family == AF_INET && socktype == SOCK_DGRAM && protocol == IPPROTO_UDP) || |
| (family == AF_INET && socktype == SOCK_STREAM && protocol == IPPROTO_TCP) || |
| (family == AF_UNSPEC && socktype == SOCK_DGRAM && protocol == IPPROTO_UDP) || |
| (family == AF_UNSPEC && socktype == SOCK_STREAM && protocol == IPPROTO_TCP)) { |
| continue; |
| } |
| |
| addrinfo* result = nullptr; |
| const addrinfo hints = { |
| .ai_family = family, |
| .ai_protocol = protocol, |
| .ai_socktype = socktype, |
| }; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("localhost", nullptr /*servname*/, &hints, &mNetcontext, |
| &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(EAI_BADHINTS, rv); |
| } |
| } |
| } |
| } |
| |
| // The test configs are used for verifying the error path of get_port(). |
| // Note that the EAI_SOCKTYPE verification are moved to an independent |
| // test case because validateHints() verify invalid socket type early now. |
| // See also InvalidParameters_SocketType. |
| TEST_F(ResolvGetAddrInfoTest, InvalidParameters_PortNameAndNumber) { |
| constexpr char http_portno[] = "80"; |
| constexpr char invalid_portno[] = "65536"; // out of valid port range from 0 to 65535 |
| constexpr char http_portname[] = "http"; |
| constexpr char invalid_portname[] = "invalid_portname"; |
| |
| static const struct TestConfig { |
| int ai_flags; |
| int ai_family; |
| int ai_socktype; |
| const char* servname; |
| |
| int expected_eai_error; |
| |
| std::string asParameters() const { |
| return StringPrintf("0x%x/%d/%d/%s", ai_flags, ai_family, ai_socktype, |
| servname ? servname : "(null)"); |
| } |
| } testConfigs[]{ |
| {0, AF_INET, SOCK_RAW /*bad*/, http_portno, EAI_SERVICE}, |
| {0, AF_INET6, SOCK_RAW /*bad*/, http_portno, EAI_SERVICE}, |
| {0, AF_UNSPEC, SOCK_RAW /*bad*/, http_portno, EAI_SERVICE}, |
| {0, AF_INET, ANY, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_INET, SOCK_STREAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_INET, SOCK_DGRAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, ANY, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, SOCK_STREAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, SOCK_DGRAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, ANY, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, SOCK_STREAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, SOCK_DGRAM, invalid_portno /*bad*/, EAI_SERVICE}, |
| {AI_NUMERICSERV, AF_INET, ANY, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_INET, SOCK_STREAM, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_INET, SOCK_DGRAM, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_INET6, ANY, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_INET6, SOCK_STREAM, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_INET6, SOCK_DGRAM, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_UNSPEC, ANY, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_UNSPEC, SOCK_STREAM, http_portname /*bad*/, EAI_NONAME}, |
| {AI_NUMERICSERV, AF_UNSPEC, SOCK_DGRAM, http_portname /*bad*/, EAI_NONAME}, |
| {0, AF_INET, ANY, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_INET, SOCK_STREAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_INET, SOCK_DGRAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, ANY, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, SOCK_STREAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_INET6, SOCK_DGRAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, ANY, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, SOCK_STREAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| {0, AF_UNSPEC, SOCK_DGRAM, invalid_portname /*bad*/, EAI_SERVICE}, |
| }; |
| |
| for (const auto& config : testConfigs) { |
| const std::string testParameters = config.asParameters(); |
| SCOPED_TRACE(testParameters); |
| |
| const addrinfo hints = { |
| .ai_flags = config.ai_flags, |
| .ai_family = config.ai_family, |
| .ai_socktype = config.ai_socktype, |
| }; |
| |
| addrinfo* result = nullptr; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("localhost", config.servname, &hints, &mNetcontext, &result, |
| &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(config.expected_eai_error, rv); |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, AlphabeticalHostname_NoData) { |
| constexpr char v4_host_name[] = "v4only.example.com."; |
| test::DNSResponder dns; |
| dns.addMapping(v4_host_name, ns_type::ns_t_a, "1.2.3.3"); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| // Want AAAA answer but DNS server has A answer only. |
| addrinfo* result = nullptr; |
| const addrinfo hints = {.ai_family = AF_INET6}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("v4only", nullptr, &hints, &mNetcontext, &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_LE(1U, GetNumQueries(dns, v4_host_name)); |
| EXPECT_EQ(nullptr, result); |
| EXPECT_EQ(EAI_NODATA, rv); |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, AlphabeticalHostname) { |
| constexpr char host_name[] = "sawadee.example.com."; |
| constexpr char v4addr[] = "1.2.3.4"; |
| constexpr char v6addr[] = "::1.2.3.4"; |
| |
| test::DNSResponder dns; |
| dns.addMapping(host_name, ns_type::ns_t_a, v4addr); |
| dns.addMapping(host_name, ns_type::ns_t_aaaa, v6addr); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| int ai_family; |
| const std::string expected_addr; |
| } testConfigs[]{ |
| {AF_INET, v4addr}, |
| {AF_INET6, v6addr}, |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE(StringPrintf("family: %d", config.ai_family)); |
| dns.clearQueries(); |
| |
| addrinfo* result = nullptr; |
| const addrinfo hints = {.ai_family = config.ai_family}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("sawadee", nullptr, &hints, &mNetcontext, &result, &event); |
| ScopedAddrinfo result_cleanup(result); |
| EXPECT_EQ(0, rv); |
| EXPECT_TRUE(result != nullptr); |
| EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| EXPECT_EQ(config.expected_addr, ToString(result)); |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, IllegalHostname) { |
| test::DNSResponder dns; |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| // Illegal hostname is verified by res_hnok() in system/netd/resolv/res_comp.cpp. |
| static constexpr char const* illegalHostnames[] = { |
| kBadCharAfterPeriodHost, |
| kBadCharBeforePeriodHost, |
| kBadCharAtTheEndHost, |
| kBadCharInTheMiddleOfLabelHost, |
| }; |
| |
| for (const auto& hostname : illegalHostnames) { |
| // Expect to get no address because hostname format is illegal. |
| // |
| // Ex: |
| // ANSWER SECTION: |
| // a.ex^ample.com. IN A 1.2.3.3 |
| // a.ex^ample.com. IN AAAA 2001:db8::42 |
| // |
| // In this example, querying "a.ex^ample.com" should get no address because |
| // "a.ex^ample.com" has an illegal char '^' in the middle of label. |
| dns.addMapping(hostname, ns_type::ns_t_a, "1.2.3.3"); |
| dns.addMapping(hostname, ns_type::ns_t_aaaa, "2001:db8::42"); |
| |
| for (const auto& family : {AF_INET, AF_INET6, AF_UNSPEC}) { |
| SCOPED_TRACE(StringPrintf("family: %d, config.name: %s", family, hostname)); |
| |
| addrinfo* res = nullptr; |
| const addrinfo hints = {.ai_family = family}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo(hostname, nullptr, &hints, &mNetcontext, &res, &event); |
| ScopedAddrinfo result(res); |
| EXPECT_EQ(nullptr, result); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, ServerResponseError) { |
| constexpr char host_name[] = "hello.example.com."; |
| |
| static const struct TestConfig { |
| ns_rcode rcode; |
| int expected_eai_error; |
| |
| // Only test failure RCODE [1..5] in RFC 1035 section 4.1.1 and skip successful RCODE 0 |
| // which means no error. |
| } testConfigs[]{ |
| // clang-format off |
| {ns_rcode::ns_r_formerr, EAI_FAIL}, |
| {ns_rcode::ns_r_servfail, EAI_AGAIN}, |
| {ns_rcode::ns_r_nxdomain, EAI_NODATA}, |
| {ns_rcode::ns_r_notimpl, EAI_FAIL}, |
| {ns_rcode::ns_r_refused, EAI_FAIL}, |
| // clang-format on |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE(StringPrintf("rcode: %d", config.rcode)); |
| |
| test::DNSResponder dns(config.rcode); |
| dns.addMapping(host_name, ns_type::ns_t_a, "1.2.3.4"); |
| dns.setResponseProbability(0.0); // always ignore requests and response preset rcode |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| addrinfo* result = nullptr; |
| const addrinfo hints = {.ai_family = AF_UNSPEC}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo(host_name, nullptr, &hints, &mNetcontext, &result, &event); |
| EXPECT_EQ(config.expected_eai_error, rv); |
| } |
| } |
| |
| // TODO: Add private DNS server timeout test. |
| TEST_F(ResolvGetAddrInfoTest, ServerTimeout) { |
| constexpr char host_name[] = "hello.example.com."; |
| test::DNSResponder dns(static_cast<ns_rcode>(-1) /*no response*/); |
| dns.addMapping(host_name, ns_type::ns_t_a, "1.2.3.4"); |
| dns.setResponseProbability(0.0); // always ignore requests and don't response |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| addrinfo* result = nullptr; |
| const addrinfo hints = {.ai_family = AF_UNSPEC}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("hello", nullptr, &hints, &mNetcontext, &result, &event); |
| EXPECT_EQ(NETD_RESOLV_TIMEOUT, rv); |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, CnamesNoIpAddress) { |
| constexpr char ACNAME[] = "acname"; // expect a cname in answer |
| constexpr char CNAMES[] = "cnames"; // expect cname chain in answer |
| |
| test::DNSResponder dns; |
| dns.addMapping("cnames.example.com.", ns_type::ns_t_cname, "acname.example.com."); |
| dns.addMapping("acname.example.com.", ns_type::ns_t_cname, "hello.example.com."); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| const char* name; |
| int family; |
| } testConfigs[]{ |
| // clang-format off |
| {ACNAME, AF_INET}, |
| {ACNAME, AF_INET6}, |
| {ACNAME, AF_UNSPEC}, |
| {CNAMES, AF_INET}, |
| {CNAMES, AF_INET6}, |
| {CNAMES, AF_UNSPEC}, |
| // clang-format on |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE( |
| StringPrintf("config.family: %d, config.name: %s", config.family, config.name)); |
| |
| addrinfo* res = nullptr; |
| const addrinfo hints = {.ai_family = config.family}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo(config.name, nullptr, &hints, &mNetcontext, &res, &event); |
| ScopedAddrinfo result(res); |
| EXPECT_EQ(nullptr, result); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, CnamesBrokenChainByIllegalCname) { |
| test::DNSResponder dns; |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| const char* name; |
| const char* cname; |
| std::string asHostName() const { return StringPrintf("%s.example.com.", name); } |
| |
| // Illegal cname is verified by res_hnok() in system/netd/resolv/res_comp.cpp. |
| } testConfigs[]{ |
| // clang-format off |
| {NAME(kBadCharAfterPeriodHost), kBadCharAfterPeriodHost}, |
| {NAME(kBadCharBeforePeriodHost), kBadCharBeforePeriodHost}, |
| {NAME(kBadCharAtTheEndHost), kBadCharAtTheEndHost}, |
| {NAME(kBadCharInTheMiddleOfLabelHost), kBadCharInTheMiddleOfLabelHost}, |
| // clang-format on |
| }; |
| |
| for (const auto& config : testConfigs) { |
| const std::string testHostName = config.asHostName(); |
| |
| // Expect to get no address because the cname chain is broken by an illegal cname format. |
| // |
| // Ex: |
| // ANSWER SECTION: |
| // hello.example.com. IN CNAME a.ex^ample.com. |
| // a.ex^ample.com. IN A 1.2.3.3 |
| // a.ex^ample.com. IN AAAA 2001:db8::42 |
| // |
| // In this example, querying hello.example.com should get no address because |
| // "a.ex^ample.com" has an illegal char '^' in the middle of label. |
| dns.addMapping(testHostName.c_str(), ns_type::ns_t_cname, config.cname); |
| dns.addMapping(config.cname, ns_type::ns_t_a, "1.2.3.3"); |
| dns.addMapping(config.cname, ns_type::ns_t_aaaa, "2001:db8::42"); |
| |
| for (const auto& family : {AF_INET, AF_INET6, AF_UNSPEC}) { |
| SCOPED_TRACE( |
| StringPrintf("family: %d, testHostName: %s", family, testHostName.c_str())); |
| |
| addrinfo* res = nullptr; |
| const addrinfo hints = {.ai_family = family}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo(config.name, nullptr, &hints, &mNetcontext, &res, &event); |
| ScopedAddrinfo result(res); |
| EXPECT_EQ(nullptr, result); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| } |
| |
| TEST_F(ResolvGetAddrInfoTest, CnamesInfiniteLoop) { |
| test::DNSResponder dns; |
| dns.addMapping("hello.example.com.", ns_type::ns_t_cname, "a.example.com."); |
| dns.addMapping("a.example.com.", ns_type::ns_t_cname, "hello.example.com."); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| for (const auto& family : {AF_INET, AF_INET6, AF_UNSPEC}) { |
| SCOPED_TRACE(StringPrintf("family: %d", family)); |
| |
| addrinfo* res = nullptr; |
| const addrinfo hints = {.ai_family = family}; |
| NetworkDnsEventReported event; |
| int rv = resolv_getaddrinfo("hello", nullptr, &hints, &mNetcontext, &res, &event); |
| ScopedAddrinfo result(res); |
| EXPECT_EQ(nullptr, result); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, AlphabeticalHostname) { |
| constexpr char host_name[] = "jiababuei.example.com."; |
| constexpr char v4addr[] = "1.2.3.4"; |
| constexpr char v6addr[] = "::1.2.3.4"; |
| |
| test::DNSResponder dns; |
| dns.addMapping(host_name, ns_type::ns_t_a, v4addr); |
| dns.addMapping(host_name, ns_type::ns_t_aaaa, v6addr); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| int ai_family; |
| const std::string expected_addr; |
| } testConfigs[]{ |
| {AF_INET, v4addr}, |
| {AF_INET6, v6addr}, |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE(StringPrintf("family: %d", config.ai_family)); |
| dns.clearQueries(); |
| |
| hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext("jiababuei", config.ai_family, &mNetcontext, |
| &hp, &event); |
| EXPECT_EQ(0, rv); |
| EXPECT_TRUE(hp != nullptr); |
| EXPECT_EQ(1U, GetNumQueries(dns, host_name)); |
| EXPECT_EQ(config.expected_addr, ToString(hp)); |
| } |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, IllegalHostname) { |
| test::DNSResponder dns; |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| // Illegal hostname is verified by res_hnok() in system/netd/resolv/res_comp.cpp. |
| static constexpr char const* illegalHostnames[] = { |
| kBadCharAfterPeriodHost, |
| kBadCharBeforePeriodHost, |
| kBadCharAtTheEndHost, |
| kBadCharInTheMiddleOfLabelHost, |
| }; |
| |
| for (const auto& hostname : illegalHostnames) { |
| // Expect to get no address because hostname format is illegal. |
| // |
| // Ex: |
| // ANSWER SECTION: |
| // a.ex^ample.com. IN A 1.2.3.3 |
| // a.ex^ample.com. IN AAAA 2001:db8::42 |
| // |
| // In this example, querying "a.ex^ample.com" should get no address because |
| // "a.ex^ample.com" has an illegal char '^' in the middle of label. |
| dns.addMapping(hostname, ns_type::ns_t_a, "1.2.3.3"); |
| dns.addMapping(hostname, ns_type::ns_t_aaaa, "2001:db8::42"); |
| |
| for (const auto& family : {AF_INET, AF_INET6}) { |
| SCOPED_TRACE(StringPrintf("family: %d, config.name: %s", family, hostname)); |
| |
| struct hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = |
| android_gethostbynamefornetcontext(hostname, family, &mNetcontext, &hp, &event); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, NoData) { |
| constexpr char v4_host_name[] = "v4only.example.com."; |
| |
| test::DNSResponder dns; |
| dns.addMapping(v4_host_name, ns_type::ns_t_a, "1.2.3.3"); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| dns.clearQueries(); |
| |
| // Want AAAA answer but DNS server has A answer only. |
| hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext("v4only", AF_INET6, &mNetcontext, &hp, &event); |
| EXPECT_LE(1U, GetNumQueries(dns, v4_host_name)); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(EAI_NODATA, rv); |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, ServerResponseError) { |
| constexpr char host_name[] = "hello.example.com."; |
| |
| static const struct TestConfig { |
| ns_rcode rcode; |
| int expected_eai_error; // expected result |
| |
| // Only test failure RCODE [1..5] in RFC 1035 section 4.1.1 and skip successful RCODE 0 |
| // which means no error. Note that the return error codes aren't mapped by rcode in the |
| // test case SERVFAIL, NOTIMP and REFUSED. See the comment of res_nsend() |
| // in system\netd\resolv\res_query.cpp for more detail. |
| } testConfigs[]{ |
| // clang-format off |
| {ns_rcode::ns_r_formerr, EAI_FAIL}, |
| {ns_rcode::ns_r_servfail, EAI_AGAIN}, // Not mapped by rcode. |
| {ns_rcode::ns_r_nxdomain, EAI_NODATA}, |
| {ns_rcode::ns_r_notimpl, EAI_AGAIN}, // Not mapped by rcode. |
| {ns_rcode::ns_r_refused, EAI_AGAIN}, // Not mapped by rcode. |
| // clang-format on |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE(StringPrintf("rcode: %d", config.rcode)); |
| |
| test::DNSResponder dns(config.rcode); |
| dns.addMapping(host_name, ns_type::ns_t_a, "1.2.3.4"); |
| dns.setResponseProbability(0.0); // always ignore requests and response preset rcode |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext(host_name, AF_INET, &mNetcontext, &hp, &event); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(config.expected_eai_error, rv); |
| } |
| } |
| |
| // TODO: Add private DNS server timeout test. |
| TEST_F(GetHostByNameForNetContextTest, ServerTimeout) { |
| constexpr char host_name[] = "hello.example.com."; |
| test::DNSResponder dns(static_cast<ns_rcode>(-1) /*no response*/); |
| dns.addMapping(host_name, ns_type::ns_t_a, "1.2.3.4"); |
| dns.setResponseProbability(0.0); // always ignore requests and don't response |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext(host_name, AF_INET, &mNetcontext, &hp, &event); |
| EXPECT_EQ(NETD_RESOLV_TIMEOUT, rv); |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, CnamesNoIpAddress) { |
| constexpr char ACNAME[] = "acname"; // expect a cname in answer |
| constexpr char CNAMES[] = "cnames"; // expect cname chain in answer |
| |
| test::DNSResponder dns; |
| dns.addMapping("cnames.example.com.", ns_type::ns_t_cname, "acname.example.com."); |
| dns.addMapping("acname.example.com.", ns_type::ns_t_cname, "hello.example.com."); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| const char* name; |
| int family; |
| } testConfigs[]{ |
| {ACNAME, AF_INET}, |
| {ACNAME, AF_INET6}, |
| {CNAMES, AF_INET}, |
| {CNAMES, AF_INET6}, |
| }; |
| |
| for (const auto& config : testConfigs) { |
| SCOPED_TRACE( |
| StringPrintf("config.family: %d, config.name: %s", config.family, config.name)); |
| |
| struct hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext(config.name, config.family, &mNetcontext, &hp, |
| &event); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, CnamesBrokenChainByIllegalCname) { |
| test::DNSResponder dns; |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| static const struct TestConfig { |
| const char* name; |
| const char* cname; |
| std::string asHostName() const { return StringPrintf("%s.example.com.", name); } |
| |
| // Illegal cname is verified by res_hnok() in system/netd/resolv/res_comp.cpp |
| } testConfigs[]{ |
| // clang-format off |
| {NAME(kBadCharAfterPeriodHost), kBadCharAfterPeriodHost}, |
| {NAME(kBadCharBeforePeriodHost), kBadCharBeforePeriodHost}, |
| {NAME(kBadCharAtTheEndHost), kBadCharAtTheEndHost}, |
| {NAME(kBadCharInTheMiddleOfLabelHost), kBadCharInTheMiddleOfLabelHost}, |
| // clang-format on |
| }; |
| |
| for (const auto& config : testConfigs) { |
| const std::string testHostName = config.asHostName(); |
| |
| // Expect to get no address because the cname chain is broken by an illegal cname format. |
| // |
| // Ex: |
| // ANSWER SECTION: |
| // hello.example.com. IN CNAME a.ex^ample.com. |
| // a.ex^ample.com. IN A 1.2.3.3 |
| // a.ex^ample.com. IN AAAA 2001:db8::42 |
| // |
| // In this example, querying hello.example.com should get no address because |
| // "a.ex^ample.com" has an illegal char '^' in the middle of label. |
| dns.addMapping(testHostName.c_str(), ns_type::ns_t_cname, config.cname); |
| dns.addMapping(config.cname, ns_type::ns_t_a, "1.2.3.3"); |
| dns.addMapping(config.cname, ns_type::ns_t_aaaa, "2001:db8::42"); |
| |
| for (const auto& family : {AF_INET, AF_INET6}) { |
| SCOPED_TRACE( |
| StringPrintf("family: %d, testHostName: %s", family, testHostName.c_str())); |
| |
| struct hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext(config.name, family, &mNetcontext, &hp, |
| &event); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| } |
| |
| TEST_F(GetHostByNameForNetContextTest, CnamesInfiniteLoop) { |
| test::DNSResponder dns; |
| dns.addMapping("hello.example.com.", ns_type::ns_t_cname, "a.example.com."); |
| dns.addMapping("a.example.com.", ns_type::ns_t_cname, "hello.example.com."); |
| ASSERT_TRUE(dns.startServer()); |
| ASSERT_EQ(0, setResolvers()); |
| |
| for (const auto& family : {AF_INET, AF_INET6}) { |
| SCOPED_TRACE(StringPrintf("family: %d", family)); |
| |
| struct hostent* hp = nullptr; |
| NetworkDnsEventReported event; |
| int rv = android_gethostbynamefornetcontext("hello", family, &mNetcontext, &hp, &event); |
| EXPECT_EQ(nullptr, hp); |
| EXPECT_EQ(EAI_FAIL, rv); |
| } |
| } |
| |
| // Note that local host file function, files_getaddrinfo(), of resolv_getaddrinfo() |
| // is not tested because it only returns a boolean (success or failure) without any error number. |
| |
| // TODO: Simplify the DNS server configuration, DNSResponder and resolv_set_nameservers, as |
| // ResolverTest does. |
| // TODO: Add test for resolv_getaddrinfo(). |
| // - DNS response message parsing. |
| // - Unexpected type of resource record (RR). |
| // - Invalid length CNAME, or QNAME. |
| // - Unexpected amount of questions. |
| // - CNAME RDATA with the domain name which has null label(s). |
| // TODO: Add test for android_gethostbynamefornetcontext(). |
| // - Invalid parameters. |
| // - DNS response message parsing. |
| // - Unexpected type of resource record (RR). |
| // - Invalid length CNAME, or QNAME. |
| // - Unexpected amount of questions. |
| // - CNAME RDATA with the domain name which has null label(s). |
| // TODO: Add test for android_gethostbyaddrfornetcontext(). |
| |
| } // end of namespace net |
| } // end of namespace android |
