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A C library for asynchronous DNS requests (grpc依赖)
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c-ares/test/ares-test-mock-ai.cc

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/*
* Copyright (C) The c-ares project
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* SPDX-License-Identifier: MIT
*/
#include "ares-test-ai.h"
#include "dns-proto.h"
#ifdef HAVE_NETINET_IN_H
#include <netinet/in.h>
#endif
#include <sstream>
#include <vector>
using testing::InvokeWithoutArgs;
using testing::DoAll;
namespace ares {
namespace test {
MATCHER_P(IncludesNumAddresses, n, "") {
if(!arg)
return false;
int cnt = 0;
for (const ares_addrinfo_node* ai = arg->nodes; ai != NULL; ai = ai->ai_next)
cnt++;
return n == cnt;
}
MATCHER_P(IncludesV4Address, address, "") {
if(!arg)
return false;
in_addr addressnum = {};
if (!ares_inet_pton(AF_INET, address, &addressnum))
return false; // wrong number format?
for (const ares_addrinfo_node* ai = arg->nodes; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family != AF_INET)
continue;
if (ai->ai_addrlen != sizeof(struct sockaddr_in))
continue;
if (reinterpret_cast<sockaddr_in*>(ai->ai_addr)->sin_addr.s_addr ==
addressnum.s_addr)
return true; // found
}
return false;
}
MATCHER_P(IncludesV6Address, address, "") {
if(!arg)
return false;
in6_addr addressnum = {};
if (!ares_inet_pton(AF_INET6, address, &addressnum)) {
return false; // wrong number format?
}
for (const ares_addrinfo_node* ai = arg->nodes; ai != NULL; ai = ai->ai_next) {
if (ai->ai_family != AF_INET6)
continue;
if (ai->ai_addrlen != sizeof(struct sockaddr_in6))
continue;
if (!memcmp(
reinterpret_cast<sockaddr_in6*>(ai->ai_addr)->sin6_addr.s6_addr,
addressnum.s6_addr, sizeof(addressnum.s6_addr)))
return true; // found
}
return false;
}
// UDP only so mock server doesn't get confused by concatenated requests
TEST_P(MockUDPChannelTestAI, GetAddrInfoParallelLookups) {
DNSPacket rsp1;
rsp1.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 100, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp1));
DNSPacket rsp2;
rsp2.set_response().set_aa()
.add_question(new DNSQuestion("www.example.com", T_A))
.add_answer(new DNSARR("www.example.com", 100, {1, 2, 3, 4}));
ON_CALL(server_, OnRequest("www.example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp2));
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
AddrInfoResult result1;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result1);
AddrInfoResult result2;
ares_getaddrinfo(channel_, "www.example.com.", NULL, &hints, AddrInfoCallback, &result2);
AddrInfoResult result3;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result3);
Process();
EXPECT_TRUE(result1.done_);
EXPECT_EQ(result1.status_, ARES_SUCCESS);
EXPECT_THAT(result1.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result1.ai_, IncludesV4Address("2.3.4.5"));
EXPECT_TRUE(result2.done_);
EXPECT_EQ(result2.status_, ARES_SUCCESS);
EXPECT_THAT(result2.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result2.ai_, IncludesV4Address("1.2.3.4"));
EXPECT_TRUE(result3.done_);
EXPECT_EQ(result3.status_, ARES_SUCCESS);
EXPECT_THAT(result3.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result3.ai_, IncludesV4Address("2.3.4.5"));
}
// UDP to TCP specific test
TEST_P(MockUDPChannelTestAI, TruncationRetry) {
DNSPacket rsptruncated;
rsptruncated.set_response().set_aa().set_tc()
.add_question(new DNSQuestion("www.google.com", T_A));
DNSPacket rspok;
rspok.set_response()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 100, {1, 2, 3, 4}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsptruncated))
.WillOnce(SetReply(&server_, &rspok));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(result.status_, ARES_SUCCESS);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("1.2.3.4"));
}
TEST_P(MockTCPChannelTestAI, MalformedResponse) {
std::vector<byte> one = {0x01};
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReplyData(&server_, one));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EBADRESP, result.status_);
}
TEST_P(MockTCPChannelTestAI, FormErrResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(FORMERR);
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EFORMERR, result.status_);
}
TEST_P(MockTCPChannelTestAI, ServFailResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(SERVFAIL);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ESERVFAIL, result.status_);
}
TEST_P(MockTCPChannelTestAI, NotImplResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(NOTIMP);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(MockTCPChannelTestAI, RefusedResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(REFUSED);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EREFUSED, result.status_);
}
TEST_P(MockTCPChannelTestAI, YXDomainResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(YXDOMAIN);
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENODATA, result.status_);
}
class MockExtraOptsTestAI
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockExtraOptsTestAI()
: MockChannelOptsTest(1, GetParam().first, GetParam().second,
FillOptions(&opts_),
ARES_OPT_SOCK_SNDBUF|ARES_OPT_SOCK_RCVBUF) {}
static struct ares_options* FillOptions(struct ares_options * opts) {
memset(opts, 0, sizeof(struct ares_options));
// Set a few options that affect socket communications
opts->socket_send_buffer_size = 514;
opts->socket_receive_buffer_size = 514;
return opts;
}
private:
struct ares_options opts_;
};
TEST_P(MockExtraOptsTestAI, SimpleQuery) {
ares_set_local_ip4(channel_, 0x7F000001);
byte addr6[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
ares_set_local_ip6(channel_, addr6);
ares_set_local_dev(channel_, "dummy");
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 100, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
}
class MockExtraOptsNDotsTestAI
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockExtraOptsNDotsTestAI(int ndots)
: MockChannelOptsTest(1, GetParam().first, GetParam().second,
FillOptions(&opts_, ndots),
ARES_OPT_SOCK_SNDBUF|ARES_OPT_SOCK_RCVBUF|ARES_OPT_NDOTS) {}
static struct ares_options* FillOptions(struct ares_options * opts, int ndots) {
memset(opts, 0, sizeof(struct ares_options));
// Set a few options that affect socket communications
opts->socket_send_buffer_size = 514;
opts->socket_receive_buffer_size = 514;
opts->ndots = ndots;
return opts;
}
private:
struct ares_options opts_;
};
class MockExtraOptsNDots5TestAI : public MockExtraOptsNDotsTestAI {
public:
MockExtraOptsNDots5TestAI() : MockExtraOptsNDotsTestAI(5) {}
};
TEST_P(MockExtraOptsNDots5TestAI, SimpleQuery) {
ares_set_local_ip4(channel_, 0x7F000001);
byte addr6[16] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01};
ares_set_local_ip6(channel_, addr6);
ares_set_local_dev(channel_, "dummy");
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("dynamodb.us-east-1.amazonaws.com", T_A))
.add_answer(new DNSARR("dynamodb.us-east-1.amazonaws.com", 100, {123, 45, 67, 8}));
ON_CALL(server_, OnRequest("dynamodb.us-east-1.amazonaws.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "dynamodb.us-east-1.amazonaws.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("123.45.67.8"));
}
class MockFlagsChannelOptsTestAI
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockFlagsChannelOptsTestAI(int flags)
: MockChannelOptsTest(1, GetParam().first, GetParam().second,
FillOptions(&opts_, flags), ARES_OPT_FLAGS) {}
static struct ares_options* FillOptions(struct ares_options * opts, int flags) {
memset(opts, 0, sizeof(struct ares_options));
opts->flags = flags;
return opts;
}
private:
struct ares_options opts_;
};
class MockNoCheckRespChannelTestAI : public MockFlagsChannelOptsTestAI {
public:
MockNoCheckRespChannelTestAI() : MockFlagsChannelOptsTestAI(ARES_FLAG_NOCHECKRESP) {}
};
TEST_P(MockNoCheckRespChannelTestAI, ServFailResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(SERVFAIL);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ESERVFAIL, result.status_);
}
TEST_P(MockNoCheckRespChannelTestAI, NotImplResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(NOTIMP);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(MockNoCheckRespChannelTestAI, RefusedResponse) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A));
rsp.set_rcode(REFUSED);
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EREFUSED, result.status_);
}
TEST_P(MockChannelTestAI, FamilyV6) {
DNSPacket rsp6;
rsp6.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSAaaaRR("example.com", 100,
{0x21, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03}));
ON_CALL(server_, OnRequest("example.com", T_AAAA))
.WillByDefault(SetReply(&server_, &rsp6));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET6;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "example.com.", NULL, &hints,
AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV6Address("2121:0000:0000:0000:0000:0000:0000:0303"));
}
#ifndef CARES_SYMBOL_HIDING
// Test case for Issue #662
TEST_P(MockChannelTestAI, PartialQueryCancel) {
std::vector<byte> nothing;
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &reply));
ON_CALL(server_, OnRequest("example.com", T_AAAA))
.WillByDefault(SetReplyData(&server_, nothing));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_UNSPEC;
ares_getaddrinfo(channel_, "example.com.", NULL, &hints,
AddrInfoCallback, &result);
// After 100ms, issues ares_cancel(), this should be enough time for the A
// record reply, but before the timeout on the AAAA record.
Process(100);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECANCELLED, result.status_);
}
#endif
TEST_P(MockChannelTestAI, FamilyV4) {
DNSPacket rsp4;
rsp4.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 100, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
AddrInfoResult result = {};
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "example.com.", NULL, &hints,
AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
}
TEST_P(MockChannelTestAI, FamilyV4_MultipleAddresses) {
DNSPacket rsp4;
rsp4.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 100, {2, 3, 4, 5}))
.add_answer(new DNSARR("example.com", 100, {7, 8, 9, 0}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
AddrInfoResult result = {};
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "example.com.", NULL, &hints,
AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.ai_;
EXPECT_EQ("{addr=[2.3.4.5], addr=[7.8.9.0]}", ss.str());
}
TEST_P(MockChannelTestAI, FamilyUnspecified) {
DNSPacket rsp6;
rsp6.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSAaaaRR("example.com", 100,
{0x21, 0x21, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x03}));
ON_CALL(server_, OnRequest("example.com", T_AAAA))
.WillByDefault(SetReply(&server_, &rsp6));
DNSPacket rsp4;
rsp4.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 100, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_UNSPEC;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "example.com.", NULL, &hints,
AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(2));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
EXPECT_THAT(result.ai_, IncludesV6Address("2121:0000:0000:0000:0000:0000:0000:0303"));
}
class MockEDNSChannelTestAI : public MockFlagsChannelOptsTestAI {
public:
MockEDNSChannelTestAI() : MockFlagsChannelOptsTestAI(ARES_FLAG_EDNS) {}
};
TEST_P(MockEDNSChannelTestAI, RetryWithoutEDNS) {
DNSPacket rspfail;
rspfail.set_response().set_aa().set_rcode(FORMERR)
.add_question(new DNSQuestion("www.google.com", T_A));
DNSPacket rspok;
rspok.set_response()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 100, {1, 2, 3, 4}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rspfail))
.WillOnce(SetReply(&server_, &rspok));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.google.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("1.2.3.4"));
}
TEST_P(MockChannelTestAI, SearchDomains) {
DNSPacket nofirst;
nofirst.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.first.com", T_A));
ON_CALL(server_, OnRequest("www.first.com", T_A))
.WillByDefault(SetReply(&server_, &nofirst));
DNSPacket nosecond;
nosecond.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.second.org", T_A));
ON_CALL(server_, OnRequest("www.second.org", T_A))
.WillByDefault(SetReply(&server_, &nosecond));
DNSPacket yesthird;
yesthird.set_response().set_aa()
.add_question(new DNSQuestion("www.third.gov", T_A))
.add_answer(new DNSARR("www.third.gov", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.third.gov", T_A))
.WillByDefault(SetReply(&server_, &yesthird));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
}
TEST_P(MockChannelTestAI, SearchDomainsServFailOnAAAA) {
DNSPacket nofirst;
nofirst.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.first.com", T_AAAA));
ON_CALL(server_, OnRequest("www.first.com", T_AAAA))
.WillByDefault(SetReply(&server_, &nofirst));
DNSPacket nofirst4;
nofirst4.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.first.com", T_A));
ON_CALL(server_, OnRequest("www.first.com", T_A))
.WillByDefault(SetReply(&server_, &nofirst4));
DNSPacket nosecond;
nosecond.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.second.org", T_AAAA));
ON_CALL(server_, OnRequest("www.second.org", T_AAAA))
.WillByDefault(SetReply(&server_, &nosecond));
DNSPacket yessecond4;
yessecond4.set_response().set_aa()
.add_question(new DNSQuestion("www.second.org", T_A))
.add_answer(new DNSARR("www.second.org", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.second.org", T_A))
.WillByDefault(SetReply(&server_, &yessecond4));
DNSPacket failthird;
failthird.set_response().set_aa().set_rcode(SERVFAIL)
.add_question(new DNSQuestion("www.third.gov", T_AAAA));
ON_CALL(server_, OnRequest("www.third.gov", T_AAAA))
.WillByDefault(SetReply(&server_, &failthird));
DNSPacket failthird4;
failthird4.set_response().set_aa().set_rcode(SERVFAIL)
.add_question(new DNSQuestion("www.third.gov", T_A));
ON_CALL(server_, OnRequest("www.third.gov", T_A))
.WillByDefault(SetReply(&server_, &failthird4));
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_UNSPEC;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
}
class MockMultiServerChannelTestAI
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockMultiServerChannelTestAI(bool rotate)
: MockChannelOptsTest(3, GetParam().first, GetParam().second, nullptr, rotate ? ARES_OPT_ROTATE : ARES_OPT_NOROTATE) {}
void CheckExample() {
AddrInfoResult result;
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "www.example.com.", NULL, &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(result.status_, ARES_SUCCESS);
EXPECT_THAT(result.ai_, IncludesNumAddresses(1));
EXPECT_THAT(result.ai_, IncludesV4Address("2.3.4.5"));
}
};
class NoRotateMultiMockTestAI : public MockMultiServerChannelTestAI {
public:
NoRotateMultiMockTestAI() : MockMultiServerChannelTestAI(false) {}
};
TEST_P(NoRotateMultiMockTestAI, ThirdServer) {
struct ares_options opts;
int optmask = 0;
memset(&opts, 0, sizeof(opts));
EXPECT_EQ(ARES_SUCCESS, ares_save_options(channel_, &opts, &optmask));
EXPECT_EQ(ARES_OPT_NOROTATE, (optmask & ARES_OPT_NOROTATE));
ares_destroy_options(&opts);
DNSPacket servfailrsp;
servfailrsp.set_response().set_aa().set_rcode(SERVFAIL)
.add_question(new DNSQuestion("www.example.com", T_A));
DNSPacket notimplrsp;
notimplrsp.set_response().set_aa().set_rcode(NOTIMP)
.add_question(new DNSQuestion("www.example.com", T_A));
DNSPacket okrsp;
okrsp.set_response().set_aa()
.add_question(new DNSQuestion("www.example.com", T_A))
.add_answer(new DNSARR("www.example.com", 100, {2,3,4,5}));
EXPECT_CALL(*servers_[0], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[0].get(), &servfailrsp));
EXPECT_CALL(*servers_[1], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[1].get(), &notimplrsp));
EXPECT_CALL(*servers_[2], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[2].get(), &okrsp));
CheckExample();
// Second time around, still starts from server [2], as [0] and [1] both
// recorded failures
EXPECT_CALL(*servers_[2], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[2].get(), &servfailrsp));
EXPECT_CALL(*servers_[0], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[0].get(), &notimplrsp));
EXPECT_CALL(*servers_[1], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[1].get(), &okrsp));
CheckExample();
// Third time around, server order is [1] (f0), [2] (f1), [0] (f2), which
// means [1] will get called twice in a row as after the first call
// order will be [1] (f1), [2] (f1), [0] (f2) since sort order is
// (failure count, index)
EXPECT_CALL(*servers_[1], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[1].get(), &servfailrsp))
.WillOnce(SetReply(servers_[1].get(), &notimplrsp));
EXPECT_CALL(*servers_[2], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[2].get(), &notimplrsp));
EXPECT_CALL(*servers_[0], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[0].get(), &okrsp));
CheckExample();
}
TEST_P(MockChannelTestAI, FamilyV4ServiceName) {
DNSPacket rsp4;
rsp4.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 100, {1, 1, 1, 1}))
.add_answer(new DNSARR("example.com", 100, {2, 2, 2, 2}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
AddrInfoResult result = {};
struct ares_addrinfo_hints hints = {};
hints.ai_family = AF_INET;
hints.ai_flags = ARES_AI_NOSORT;
ares_getaddrinfo(channel_, "example.com", "http", &hints, AddrInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.ai_;
EXPECT_EQ("{addr=[1.1.1.1:80], addr=[2.2.2.2:80]}", ss.str());
}
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockChannelTestAI,
::testing::ValuesIn(ares::test::families_modes));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockUDPChannelTestAI,
::testing::ValuesIn(ares::test::families));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockTCPChannelTestAI,
::testing::ValuesIn(ares::test::families));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockExtraOptsTestAI,
::testing::ValuesIn(ares::test::families_modes));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockExtraOptsNDots5TestAI,
::testing::ValuesIn(ares::test::families_modes));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockNoCheckRespChannelTestAI,
::testing::ValuesIn(ares::test::families_modes));
INSTANTIATE_TEST_SUITE_P(AddressFamiliesAI, MockEDNSChannelTestAI,
::testing::ValuesIn(ares::test::families_modes));
INSTANTIATE_TEST_SUITE_P(TransportModesAI, NoRotateMultiMockTestAI,
::testing::ValuesIn(ares::test::families_modes));
} // namespace test
} // namespace ares