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

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/* MIT License
*
* Copyright (c) The c-ares project and its contributors
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* SPDX-License-Identifier: MIT
*/
#include "ares-test.h"
#include "dns-proto.h"
#ifndef WIN32
#include <sys/types.h>
#include <sys/stat.h>
#endif
#include <sstream>
#include <vector>
using testing::InvokeWithoutArgs;
using testing::DoAll;
namespace ares {
namespace test {
TEST_P(MockChannelTest, Basic) {
std::vector<byte> reply = {
0x00, 0x00, // qid
0x84, // response + query + AA + not-TC + not-RD
0x00, // not-RA + not-Z + not-AD + not-CD + rc=NoError
0x00, 0x01, // 1 question
0x00, 0x01, // 1 answer RRs
0x00, 0x00, // 0 authority RRs
0x00, 0x00, // 0 additional RRs
// Question
0x03, 'w', 'w', 'w',
0x06, 'g', 'o', 'o', 'g', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x00, 0x01, // type A
0x00, 0x01, // class IN
// Answer
0x03, 'w', 'w', 'w',
0x06, 'g', 'o', 'o', 'g', 'l', 'e',
0x03, 'c', 'o', 'm',
0x00,
0x00, 0x01, // type A
0x00, 0x01, // class IN
0x00, 0x00, 0x01, 0x00, // TTL
0x00, 0x04, // rdata length
0x01, 0x02, 0x03, 0x04
};
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReplyData(&server_, reply));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
// UDP only so mock server doesn't get confused by concatenated requests
TEST_P(MockUDPChannelTest, GetHostByNameParallelLookups) {
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));
HostResult result1;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result1);
HostResult result2;
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result2);
HostResult result3;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result3);
Process();
EXPECT_TRUE(result1.done_);
EXPECT_TRUE(result2.done_);
EXPECT_TRUE(result3.done_);
std::stringstream ss1;
ss1 << result1.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss1.str());
std::stringstream ss2;
ss2 << result2.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[1.2.3.4]}", ss2.str());
std::stringstream ss3;
ss3 << result3.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss3.str());
}
// UDP to TCP specific test
TEST_P(MockUDPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
static int sock_cb_count = 0;
static int SocketConnectCallback(ares_socket_t fd, int type, void *data) {
int rc = *(int*)data;
if (verbose) std::cerr << "SocketConnectCallback(" << fd << ") invoked" << std::endl;
sock_cb_count++;
return rc;
}
TEST_P(MockChannelTest, SockCallback) {
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}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsp));
// Get notified of new sockets
int rc = ARES_SUCCESS;
ares_set_socket_callback(channel_, SocketConnectCallback, &rc);
HostResult result;
sock_cb_count = 0;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_EQ(1, sock_cb_count);
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, SockFailCallback) {
// Notification of new sockets gives an error.
int rc = -1;
ares_set_socket_callback(channel_, SocketConnectCallback, &rc);
HostResult result;
sock_cb_count = 0;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_LT(1, sock_cb_count);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECONNREFUSED, result.status_);
}
static int sock_config_cb_count = 0;
static int SocketConfigureCallback(ares_socket_t fd, int type, void *data) {
int rc = *(int*)data;
if (verbose) std::cerr << "SocketConfigureCallback(" << fd << ") invoked" << std::endl;
sock_config_cb_count++;
return rc;
}
TEST_P(MockChannelTest, SockConfigureCallback) {
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}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsp));
// Get notified of new sockets
int rc = ARES_SUCCESS;
ares_set_socket_configure_callback(channel_, SocketConfigureCallback, &rc);
HostResult result;
sock_config_cb_count = 0;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_EQ(1, sock_config_cb_count);
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, SockConfigureFailCallback) {
// Notification of new sockets gives an error.
int rc = -1;
ares_set_socket_configure_callback(channel_, SocketConfigureCallback, &rc);
HostResult result;
sock_config_cb_count = 0;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_LT(1, sock_config_cb_count);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECONNREFUSED, result.status_);
}
TEST_P(MockChannelTest, ReInit) {
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}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReply(&server_, &rsp));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
EXPECT_EQ(ARES_SUCCESS, ares_reinit(channel_));
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
#define MAXUDPQUERIES_TOTAL 32
#define MAXUDPQUERIES_LIMIT 8
class MockUDPMaxQueriesTest
: public MockChannelOptsTest,
public ::testing::WithParamInterface<int> {
public:
MockUDPMaxQueriesTest()
: MockChannelOptsTest(1, GetParam(), false,
FillOptions(&opts_),
ARES_OPT_UDP_MAX_QUERIES) {}
static struct ares_options* FillOptions(struct ares_options * opts) {
memset(opts, 0, sizeof(struct ares_options));
opts->udp_max_queries = MAXUDPQUERIES_LIMIT;
return opts;
}
private:
struct ares_options opts_;
};
TEST_P(MockUDPMaxQueriesTest, GetHostByNameParallelLookups) {
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));
// Get notified of new sockets so we can validate how many are created
int rc = ARES_SUCCESS;
ares_set_socket_callback(channel_, SocketConnectCallback, &rc);
sock_cb_count = 0;
HostResult result[MAXUDPQUERIES_TOTAL];
for (size_t i=0; i<MAXUDPQUERIES_TOTAL; i++) {
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result[i]);
}
Process();
EXPECT_EQ(MAXUDPQUERIES_TOTAL / MAXUDPQUERIES_LIMIT, sock_cb_count);
for (size_t i=0; i<MAXUDPQUERIES_TOTAL; i++) {
std::stringstream ss;
EXPECT_TRUE(result[i].done_);
ss << result[i].host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
}
class CacheQueriesTest
: public MockChannelOptsTest,
public ::testing::WithParamInterface<int> {
public:
CacheQueriesTest()
: MockChannelOptsTest(1, GetParam(), false,
FillOptions(&opts_),
ARES_OPT_QUERY_CACHE) {}
static struct ares_options* FillOptions(struct ares_options * opts) {
memset(opts, 0, sizeof(struct ares_options));
opts->qcache_max_ttl = 3600;
return opts;
}
private:
struct ares_options opts_;
};
TEST_P(CacheQueriesTest, GetHostByNameCache) {
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));
// Get notified of new sockets so we can validate how many are created
int rc = ARES_SUCCESS;
ares_set_socket_callback(channel_, SocketConnectCallback, &rc);
sock_cb_count = 0;
HostResult result1;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result1);
Process();
std::stringstream ss1;
EXPECT_TRUE(result1.done_);
ss1 << result1.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss1.str());
/* Run again, should return cached result */
HostResult result2;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result2);
Process();
std::stringstream ss2;
EXPECT_TRUE(result2.done_);
ss2 << result2.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss2.str());
EXPECT_EQ(1, sock_cb_count);
}
#define TCPPARALLELLOOKUPS 32
TEST_P(MockTCPChannelTest, GetHostByNameParallelLookups) {
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));
// Get notified of new sockets so we can validate how many are created
int rc = ARES_SUCCESS;
ares_set_socket_callback(channel_, SocketConnectCallback, &rc);
sock_cb_count = 0;
HostResult result[TCPPARALLELLOOKUPS];
for (size_t i=0; i<TCPPARALLELLOOKUPS; i++) {
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result[i]);
}
Process();
EXPECT_EQ(1, sock_cb_count);
for (size_t i=0; i<TCPPARALLELLOOKUPS; i++) {
std::stringstream ss;
EXPECT_TRUE(result[i].done_);
ss << result[i].host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
}
TEST_P(MockTCPChannelTest, MalformedResponse) {
std::vector<byte> one = {0x00};
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReplyData(&server_, one));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ETIMEOUT, result.status_);
}
TEST_P(MockTCPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EFORMERR, result.status_);
}
TEST_P(MockTCPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ESERVFAIL, result.status_);
}
TEST_P(MockTCPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(MockTCPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EREFUSED, result.status_);
}
TEST_P(MockTCPChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENODATA, result.status_);
}
class MockExtraOptsTest
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockExtraOptsTest()
: 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(MockExtraOptsTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
class MockFlagsChannelOptsTest
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockFlagsChannelOptsTest(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 MockNoCheckRespChannelTest : public MockFlagsChannelOptsTest {
public:
MockNoCheckRespChannelTest() : MockFlagsChannelOptsTest(ARES_FLAG_NOCHECKRESP) {}
};
TEST_P(MockNoCheckRespChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ESERVFAIL, result.status_);
}
TEST_P(MockNoCheckRespChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(MockNoCheckRespChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EREFUSED, result.status_);
}
class MockEDNSChannelTest : public MockFlagsChannelOptsTest {
public:
MockEDNSChannelTest() : MockFlagsChannelOptsTest(ARES_FLAG_EDNS) {}
};
TEST_P(MockEDNSChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, 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));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.third.gov' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
// Relies on retries so is UDP-only
TEST_P(MockUDPChannelTest, SearchDomainsWithResentReply) {
DNSPacket nofirst;
nofirst.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.first.com", T_A));
EXPECT_CALL(server_, OnRequest("www.first.com", T_A))
.WillOnce(SetReply(&server_, &nofirst));
DNSPacket nosecond;
nosecond.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.second.org", T_A));
EXPECT_CALL(server_, OnRequest("www.second.org", T_A))
.WillOnce(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}));
// Before sending the real answer, resend an earlier reply
EXPECT_CALL(server_, OnRequest("www.third.gov", T_A))
.WillOnce(DoAll(SetReply(&server_, &nofirst),
SetReplyQID(&server_, 123)))
.WillOnce(DoAll(SetReply(&server_, &yesthird),
SetReplyQID(&server_, -1)));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.third.gov' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, SearchDomainsBare) {
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 nothird;
nothird.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www.third.gov", T_A));
ON_CALL(server_, OnRequest("www.third.gov", T_A))
.WillByDefault(SetReply(&server_, &nothird));
DNSPacket yesbare;
yesbare.set_response().set_aa()
.add_question(new DNSQuestion("www", T_A))
.add_answer(new DNSARR("www", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www", T_A))
.WillByDefault(SetReply(&server_, &yesbare));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, SearchNoDataThenSuccess) {
// First two search domains recognize the name but have no A records.
DNSPacket nofirst;
nofirst.set_response().set_aa()
.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()
.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));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.third.gov' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, SearchNoDataThenNoDataBare) {
// First two search domains recognize the name but have no A records.
DNSPacket nofirst;
nofirst.set_response().set_aa()
.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()
.add_question(new DNSQuestion("www.second.org", T_A));
ON_CALL(server_, OnRequest("www.second.org", T_A))
.WillByDefault(SetReply(&server_, &nosecond));
DNSPacket nothird;
nothird.set_response().set_aa()
.add_question(new DNSQuestion("www.third.gov", T_A));
ON_CALL(server_, OnRequest("www.third.gov", T_A))
.WillByDefault(SetReply(&server_, &nothird));
DNSPacket nobare;
nobare.set_response().set_aa()
.add_question(new DNSQuestion("www", T_A));
ON_CALL(server_, OnRequest("www", T_A))
.WillByDefault(SetReply(&server_, &nobare));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENODATA, result.status_);
}
TEST_P(MockChannelTest, SearchNoDataThenFail) {
// First two search domains recognize the name but have no A records.
DNSPacket nofirst;
nofirst.set_response().set_aa()
.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()
.add_question(new DNSQuestion("www.second.org", T_A));
ON_CALL(server_, OnRequest("www.second.org", T_A))
.WillByDefault(SetReply(&server_, &nosecond));
DNSPacket nothird;
nothird.set_response().set_aa()
.add_question(new DNSQuestion("www.third.gov", T_A));
ON_CALL(server_, OnRequest("www.third.gov", T_A))
.WillByDefault(SetReply(&server_, &nothird));
DNSPacket nobare;
nobare.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("www", T_A));
ON_CALL(server_, OnRequest("www", T_A))
.WillByDefault(SetReply(&server_, &nobare));
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENODATA, result.status_);
}
TEST_P(MockChannelTest, SearchAllocFailure) {
SearchResult result;
SetAllocFail(1);
ares_search(channel_, "fully.qualified.", C_IN, T_A, SearchCallback, &result);
/* Already done */
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOMEM, result.status_);
}
TEST_P(MockChannelTest, SearchHighNdots) {
DNSPacket nobare;
nobare.set_response().set_aa().set_rcode(NXDOMAIN)
.add_question(new DNSQuestion("a.b.c.w.w.w", T_A));
ON_CALL(server_, OnRequest("a.b.c.w.w.w", T_A))
.WillByDefault(SetReply(&server_, &nobare));
DNSPacket yesfirst;
yesfirst.set_response().set_aa()
.add_question(new DNSQuestion("a.b.c.w.w.w.first.com", T_A))
.add_answer(new DNSARR("a.b.c.w.w.w.first.com", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("a.b.c.w.w.w.first.com", T_A))
.WillByDefault(SetReply(&server_, &yesfirst));
SearchResult result;
ares_search(channel_, "a.b.c.w.w.w", C_IN, T_A, SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
std::stringstream ss;
ss << PacketToString(result.data_);
EXPECT_EQ("RSP QRY AA NOERROR Q:{'a.b.c.w.w.w.first.com' IN A} "
"A:{'a.b.c.w.w.w.first.com' IN A TTL=512 2.3.4.5}",
ss.str());
}
TEST_P(MockChannelTest, V4WorksV6Timeout) {
std::vector<byte> nothing;
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &reply));
ON_CALL(server_, OnRequest("www.google.com", T_AAAA))
.WillByDefault(SetReplyData(&server_, nothing));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_UNSPEC, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(1, result.timeouts_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
#ifndef CARES_SYMBOL_HIDING
// Test case for Issue #662
TEST_P(MockChannelTest, PartialQueryCancel) {
std::vector<byte> nothing;
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &reply));
ON_CALL(server_, OnRequest("www.google.com", T_AAAA))
.WillByDefault(SetReplyData(&server_, nothing));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_UNSPEC, HostCallback, &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(MockChannelTest, UnspecifiedFamilyV6) {
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));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_UNSPEC, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
// Default to IPv6 when both are available.
EXPECT_EQ("{'example.com' aliases=[] addrs=[2121:0000:0000:0000:0000:0000:0000:0303]}", ss.str());
}
TEST_P(MockChannelTest, UnspecifiedFamilyV4) {
DNSPacket rsp6;
rsp6.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA));
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));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_UNSPEC, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, UnspecifiedFamilyNoData) {
DNSPacket rsp6;
rsp6.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSCnameRR("example.com", 100, "elsewhere.com"));
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));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_UNSPEC, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'' aliases=[] addrs=[]}", ss.str());
}
TEST_P(MockChannelTest, UnspecifiedFamilyCname6A4) {
DNSPacket rsp6;
rsp6.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSCnameRR("example.com", 100, "elsewhere.com"));
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, {1, 2, 3, 4}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp4));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_UNSPEC, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, ExplicitIP) {
HostResult result;
ares_gethostbyname(channel_, "1.2.3.4", AF_INET, HostCallback, &result);
EXPECT_TRUE(result.done_); // Immediate return
EXPECT_EQ(ARES_SUCCESS, result.status_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'1.2.3.4' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, ExplicitIPAllocFail) {
HostResult result;
SetAllocSizeFail(strlen("1.2.3.4") + 1);
ares_gethostbyname(channel_, "1.2.3.4", AF_INET, HostCallback, &result);
EXPECT_TRUE(result.done_); // Immediate return
EXPECT_EQ(ARES_ENOMEM, result.status_);
}
TEST_P(MockChannelTest, SortListV4) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_A))
.add_answer(new DNSARR("example.com", 100, {22, 23, 24, 25}))
.add_answer(new DNSARR("example.com", 100, {12, 13, 14, 15}))
.add_answer(new DNSARR("example.com", 100, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("example.com", T_A))
.WillByDefault(SetReply(&server_, &rsp));
{
EXPECT_EQ(ARES_SUCCESS, ares_set_sortlist(channel_, "12.13.0.0/255.255.0.0 1234::5678"));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[12.13.14.15, 22.23.24.25, 2.3.4.5]}", ss.str());
}
{
EXPECT_EQ(ARES_SUCCESS, ares_set_sortlist(channel_, "2.3.0.0/16 130.140.150.160/26"));
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[2.3.4.5, 22.23.24.25, 12.13.14.15]}", ss.str());
}
struct ares_options options;
memset(&options, 0, sizeof(options));
int optmask = 0;
EXPECT_EQ(ARES_SUCCESS, ares_save_options(channel_, &options, &optmask));
EXPECT_TRUE((optmask & ARES_OPT_SORTLIST) == ARES_OPT_SORTLIST);
ares_destroy_options(&options);
}
TEST_P(MockChannelTest, SortListV6) {
DNSPacket rsp;
rsp.set_response().set_aa()
.add_question(new DNSQuestion("example.com", T_AAAA))
.add_answer(new DNSAaaaRR("example.com", 100,
{0x11, 0x11, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x02}))
.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_, &rsp));
{
ares_set_sortlist(channel_, "1111::/16 2.3.0.0/255.255.0.0");
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[1111:0000:0000:0000:0000:0000:0000:0202, "
"2121:0000:0000:0000:0000:0000:0000:0303]}", ss.str());
}
{
ares_set_sortlist(channel_, "2121::/8");
HostResult result;
ares_gethostbyname(channel_, "example.com.", AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'example.com' aliases=[] addrs=[2121:0000:0000:0000:0000:0000:0000:0303, "
"1111:0000:0000:0000:0000:0000:0000:0202]}", ss.str());
}
}
// Relies on retries so is UDP-only
TEST_P(MockUDPChannelTest, SearchDomainsAllocFail) {
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));
// Fail a variety of different memory allocations, and confirm
// that the operation either fails with ENOMEM or succeeds
// with the expected result.
const int kCount = 34;
HostResult results[kCount];
for (int ii = 1; ii <= kCount; ii++) {
HostResult* result = &(results[ii - 1]);
ClearFails();
SetAllocFail(ii);
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, result);
Process();
EXPECT_TRUE(result->done_);
if (result->status_ == ARES_SUCCESS) {
std::stringstream ss;
ss << result->host_;
EXPECT_EQ("{'www.third.gov' aliases=[] addrs=[2.3.4.5]}", ss.str()) << " failed alloc #" << ii;
if (verbose) std::cerr << "Succeeded despite failure of alloc #" << ii << std::endl;
}
}
// Explicitly destroy the channel now, so that the HostResult objects
// are still valid (in case any pending work refers to them).
ares_destroy(channel_);
channel_ = nullptr;
}
// Relies on retries so is UDP-only
TEST_P(MockUDPChannelTest, Resend) {
std::vector<byte> nothing;
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReplyData(&server_, nothing))
.WillOnce(SetReplyData(&server_, nothing))
.WillOnce(SetReply(&server_, &reply));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(2, result.timeouts_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, CancelImmediate) {
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
ares_cancel(channel_);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECANCELLED, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
TEST_P(MockChannelTest, CancelImmediateGetHostByAddr) {
HostResult result;
struct in_addr addr;
addr.s_addr = htonl(0x08080808);
ares_gethostbyaddr(channel_, &addr, sizeof(addr), AF_INET, HostCallback, &result);
ares_cancel(channel_);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECANCELLED, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
// Relies on retries so is UDP-only
TEST_P(MockUDPChannelTest, CancelLater) {
std::vector<byte> nothing;
// On second request, cancel the channel.
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(SetReplyData(&server_, nothing))
.WillOnce(CancelChannel(&server_, channel_));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ECANCELLED, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
TEST_P(MockChannelTest, DisconnectFirstAttempt) {
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
// On second request, cancel the channel.
EXPECT_CALL(server_, OnRequest("www.google.com", T_A))
.WillOnce(Disconnect(&server_))
.WillOnce(SetReply(&server_, &reply));
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, GetHostByNameDestroyAbsolute) {
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
ares_destroy(channel_);
channel_ = nullptr;
EXPECT_TRUE(result.done_); // Synchronous
EXPECT_EQ(ARES_EDESTRUCTION, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
TEST_P(MockChannelTest, GetHostByNameDestroyRelative) {
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
ares_destroy(channel_);
channel_ = nullptr;
EXPECT_TRUE(result.done_); // Synchronous
EXPECT_EQ(ARES_EDESTRUCTION, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
TEST_P(MockChannelTest, GetHostByNameCNAMENoData) {
DNSPacket response;
response.set_response().set_aa()
.add_question(new DNSQuestion("cname.first.com", T_A))
.add_answer(new DNSCnameRR("cname.first.com", 100, "a.first.com"));
ON_CALL(server_, OnRequest("cname.first.com", T_A))
.WillByDefault(SetReply(&server_, &response));
HostResult result;
ares_gethostbyname(channel_, "cname.first.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENODATA, result.status_);
}
TEST_P(MockChannelTest, GetHostByAddrDestroy) {
unsigned char gdns_addr4[4] = {0x08, 0x08, 0x08, 0x08};
HostResult result;
ares_gethostbyaddr(channel_, gdns_addr4, sizeof(gdns_addr4), AF_INET, HostCallback, &result);
ares_destroy(channel_);
channel_ = nullptr;
EXPECT_TRUE(result.done_); // Synchronous
EXPECT_EQ(ARES_EDESTRUCTION, result.status_);
EXPECT_EQ(0, result.timeouts_);
}
#ifndef WIN32
TEST_P(MockChannelTest, HostAlias) {
DNSPacket reply;
reply.set_response().set_aa()
.add_question(new DNSQuestion("www.google.com", T_A))
.add_answer(new DNSARR("www.google.com", 0x0100, {0x01, 0x02, 0x03, 0x04}));
ON_CALL(server_, OnRequest("www.google.com", T_A))
.WillByDefault(SetReply(&server_, &reply));
TempFile aliases("\n\n# www commentedout\nwww www.google.com\n");
EnvValue with_env("HOSTALIASES", aliases.filename());
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.google.com' aliases=[] addrs=[1.2.3.4]}", ss.str());
}
TEST_P(MockChannelTest, HostAliasMissing) {
DNSPacket yesfirst;
yesfirst.set_response().set_aa()
.add_question(new DNSQuestion("www.first.com", T_A))
.add_answer(new DNSARR("www.first.com", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.first.com", T_A))
.WillByDefault(SetReply(&server_, &yesfirst));
TempFile aliases("\n\n# www commentedout\nww www.google.com\n");
EnvValue with_env("HOSTALIASES", aliases.filename());
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.first.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, HostAliasMissingFile) {
DNSPacket yesfirst;
yesfirst.set_response().set_aa()
.add_question(new DNSQuestion("www.first.com", T_A))
.add_answer(new DNSARR("www.first.com", 0x0200, {2, 3, 4, 5}));
ON_CALL(server_, OnRequest("www.first.com", T_A))
.WillByDefault(SetReply(&server_, &yesfirst));
EnvValue with_env("HOSTALIASES", "bogus.mcfile");
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.first.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
TEST_P(MockChannelTest, HostAliasUnreadable) {
TempFile aliases("www www.google.com\n");
EXPECT_EQ(chmod(aliases.filename(), 0), 0);
/* Perform OS sanity checks. We are observing on Debian after the chmod(fn, 0)
* that we are still able to fopen() the file which is unexpected. Skip the
* test if we observe this behavior */
struct stat st;
EXPECT_EQ(stat(aliases.filename(), &st), 0);
EXPECT_EQ(st.st_mode & (S_IRWXU|S_IRWXG|S_IRWXO), 0);
FILE *fp = fopen(aliases.filename(), "r");
if (fp != NULL) {
if (verbose) std::cerr << "Skipping Test due to OS incompatibility (open file caching)" << std::endl;
fclose(fp);
return;
}
EnvValue with_env("HOSTALIASES", aliases.filename());
HostResult result;
ares_gethostbyname(channel_, "www", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EFILE, result.status_);
chmod(aliases.filename(), 0777);
}
#endif
class MockMultiServerChannelTest
: public MockChannelOptsTest,
public ::testing::WithParamInterface< std::pair<int, bool> > {
public:
MockMultiServerChannelTest(bool rotate)
: MockChannelOptsTest(3, GetParam().first, GetParam().second, nullptr, rotate ? ARES_OPT_ROTATE : ARES_OPT_NOROTATE) {}
void CheckExample() {
HostResult result;
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
std::stringstream ss;
ss << result.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss.str());
}
};
class NoRotateMultiMockTest : public MockMultiServerChannelTest {
public:
NoRotateMultiMockTest() : MockMultiServerChannelTest(false) {}
};
TEST_P(NoRotateMultiMockTest, 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(NoRotateMultiMockTest, ServerNoResponseFailover) {
std::vector<byte> nothing;
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}));
/* Server #1 works fine on first attempt, then acts like its offline on
* second, then backonline on the third. */
EXPECT_CALL(*servers_[0], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[0].get(), &okrsp))
.WillOnce(SetReplyData(servers_[0].get(), nothing))
.WillOnce(SetReply(servers_[0].get(), &okrsp));
/* Server #2 always acts like its offline */
ON_CALL(*servers_[1], OnRequest("www.example.com", T_A))
.WillByDefault(SetReplyData(servers_[1].get(), nothing));
/* Server #3 works fine on first and second request, then no reply on 3rd */
EXPECT_CALL(*servers_[2], OnRequest("www.example.com", T_A))
.WillOnce(SetReply(servers_[2].get(), &okrsp))
.WillOnce(SetReply(servers_[2].get(), &okrsp))
.WillOnce(SetReplyData(servers_[2].get(), nothing));
HostResult result;
/* 1. First server returns a response on the first request immediately, normal
* operation on channel. */
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(0, result.timeouts_);
std::stringstream ss1;
ss1 << result.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss1.str());
/* 2. On the second request, simulate the first and second servers not
* returning a response at all, but the 3rd server works, so should have
* 2 timeouts. */
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(2, result.timeouts_);
std::stringstream ss2;
ss2 << result.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss2.str());
/* 3. On the third request, the active server should be #3, so should respond
* immediately with no timeouts */
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(0, result.timeouts_);
std::stringstream ss3;
ss3 << result.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss3.str());
/* 4. On the fourth request, the active server should be #3, but will timeout,
* and the first server should then respond */
ares_gethostbyname(channel_, "www.example.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(1, result.timeouts_);
std::stringstream ss4;
ss4 << result.host_;
EXPECT_EQ("{'www.example.com' aliases=[] addrs=[2.3.4.5]}", ss4.str());
}
const char *af_tostr(int af)
{
switch (af) {
case AF_INET:
return "ipv4";
case AF_INET6:
return "ipv6";
}
return "ipunknown";
}
const char *mode_tostr(bool mode)
{
return mode?"ForceTCP":"DefaultUDP";
}
std::string PrintFamilyMode(const testing::TestParamInfo<std::pair<int, bool>> &info)
{
std::string name;
name += af_tostr(std::get<0>(info.param));
name += "_";
name += mode_tostr(std::get<1>(info.param));
return name;
}
std::string PrintFamily(const testing::TestParamInfo<int> &info)
{
std::string name;
name += af_tostr(info.param);
return name;
}
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockChannelTest, ::testing::ValuesIn(ares::test::families_modes), PrintFamilyMode);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockUDPChannelTest, ::testing::ValuesIn(ares::test::families), PrintFamily);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockUDPMaxQueriesTest, ::testing::ValuesIn(ares::test::families), PrintFamily);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, CacheQueriesTest, ::testing::ValuesIn(ares::test::families), PrintFamily);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockTCPChannelTest, ::testing::ValuesIn(ares::test::families), PrintFamily);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockExtraOptsTest, ::testing::ValuesIn(ares::test::families_modes), PrintFamilyMode);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockNoCheckRespChannelTest, ::testing::ValuesIn(ares::test::families_modes), PrintFamilyMode);
INSTANTIATE_TEST_SUITE_P(AddressFamilies, MockEDNSChannelTest, ::testing::ValuesIn(ares::test::families_modes), PrintFamilyMode);
INSTANTIATE_TEST_SUITE_P(TransportModes, NoRotateMultiMockTest, ::testing::ValuesIn(ares::test::families_modes), PrintFamilyMode);
} // namespace test
} // namespace ares