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

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// This file includes tests that attempt to do real lookups
// of DNS names using the local machine's live infrastructure.
// As a result, we don't check the results very closely, to allow
// for varying local configurations.
#include "ares-test.h"
#include <netdb.h>
namespace ares {
namespace test {
// Use the address of Google's public DNS servers as example addresses that are
// likely to be accessible everywhere/everywhen.
unsigned char gdns_addr4[4] = {0x08, 0x08, 0x08, 0x08};
unsigned char gdns_addr6[16] = {0x20, 0x01, 0x48, 0x60, 0x48, 0x60, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x88};
TEST_F(DefaultChannelTest, LiveGetHostByNameV4) {
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET, result.host_.addrtype_);
}
TEST_F(DefaultChannelTest, LiveGetHostByNameV6) {
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET6, result.host_.addrtype_);
}
TEST_F(DefaultChannelTest, LiveGetHostByAddrV4) {
HostResult result;
ares_gethostbyaddr(channel_, gdns_addr4, sizeof(gdns_addr4), AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET, result.host_.addrtype_);
}
TEST_F(DefaultChannelTest, LiveGetHostByAddrV6) {
HostResult result;
ares_gethostbyaddr(channel_, gdns_addr6, sizeof(gdns_addr6), AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET6, result.host_.addrtype_);
}
TEST_F(DefaultChannelTest, LiveGetHostByNameFile) {
struct hostent *host = nullptr;
// Still need a channel even to query /etc/hosts.
EXPECT_EQ(ARES_ENOTFOUND,
ares_gethostbyname_file(nullptr, "localhost", AF_INET, &host));
int rc = ares_gethostbyname_file(channel_, "bogus.mcname", AF_INET, &host);
EXPECT_EQ(nullptr, host);
EXPECT_EQ(ARES_ENOTFOUND, rc);
rc = ares_gethostbyname_file(channel_, "localhost", AF_INET, &host);
if (rc == ARES_SUCCESS) {
EXPECT_NE(nullptr, host);
ares_free_hostent(host);
}
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByNameV4) {
HostResult result;
ares_gethostbyname(channel_, "localhost", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
if (result.status_ != ARES_ENOTFOUND) {
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ(1, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET, result.host_.addrtype_);
EXPECT_NE(std::string::npos, result.host_.name_.find("localhost"));
}
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByNameV6) {
HostResult result;
ares_gethostbyname(channel_, "localhost", AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
if (result.status_ == ARES_SUCCESS) {
EXPECT_EQ(1, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET6, result.host_.addrtype_);
std::stringstream ss;
ss << HostEnt(result.host_);
EXPECT_NE(std::string::npos, result.host_.name_.find("localhost"));
}
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByNameIPV4) {
HostResult result;
ares_gethostbyname(channel_, "127.0.0.1", AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ(1, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET, result.host_.addrtype_);
std::stringstream ss;
ss << HostEnt(result.host_);
EXPECT_EQ("{'127.0.0.1' aliases=[] addrs=[127.0.0.1]}", ss.str());
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByNameIPV6) {
HostResult result;
ares_gethostbyname(channel_, "::1", AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
if (result.status_ != ARES_ENOTFOUND) {
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ(1, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET6, result.host_.addrtype_);
std::stringstream ss;
ss << HostEnt(result.host_);
EXPECT_EQ("{'::1' aliases=[] addrs=[0000:0000:0000:0000:0000:0000:0000:0001]}", ss.str());
}
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostFailFamily) {
HostResult result;
ares_gethostbyname(channel_, "127.0.0.1", AF_INET+AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByAddrV4) {
HostResult result;
struct in_addr addr;
addr.s_addr = htonl(INADDR_LOOPBACK);
ares_gethostbyaddr(channel_, &addr, sizeof(addr), AF_INET, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
if (result.status_ != ARES_ENOTFOUND) {
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET, result.host_.addrtype_);
EXPECT_NE(std::string::npos,
result.host_.name_.find("localhost"));
}
}
TEST_P(DefaultChannelModeTest, LiveGetLocalhostByAddrV6) {
HostResult result;
struct in6_addr addr = in6addr_loopback;
ares_gethostbyaddr(channel_, &addr, sizeof(addr), AF_INET6, HostCallback, &result);
Process();
EXPECT_TRUE(result.done_);
if (result.status_ != ARES_ENOTFOUND) {
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_LT(0, (int)result.host_.addrs_.size());
EXPECT_EQ(AF_INET6, result.host_.addrtype_);
EXPECT_NE(std::string::npos,
result.host_.name_.find("localhost"));
}
}
TEST_P(DefaultChannelModeTest, LiveGetHostByAddrFailFamily) {
HostResult result;
unsigned char addr[4] = {8, 8, 8, 8};
ares_gethostbyaddr(channel_, addr, sizeof(addr), AF_INET6+AF_INET,
HostCallback, &result);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(DefaultChannelModeTest, LiveGetHostByAddrFailAddrSize) {
HostResult result;
unsigned char addr[4] = {8, 8, 8, 8};
ares_gethostbyaddr(channel_, addr, sizeof(addr) - 1, AF_INET,
HostCallback, &result);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_P(DefaultChannelModeTest, LiveGetHostByAddrFailAlloc) {
HostResult result;
unsigned char addr[4] = {8, 8, 8, 8};
SetAllocFail(1);
ares_gethostbyaddr(channel_, addr, sizeof(addr), AF_INET,
HostCallback, &result);
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOMEM, result.status_);
}
INSTANTIATE_TEST_CASE_P(Modes, DefaultChannelModeTest,
::testing::Values("f", "b", "fb", "bf"));
TEST_F(DefaultChannelTest, LiveSearchA) {
SearchResult result;
ares_search(channel_, "www.facebook.com.", ns_c_in, ns_t_a,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchEmptyA) {
SearchResult result;
ares_search(channel_, "", ns_c_in, ns_t_a,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_NE(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchNS) {
SearchResult result;
ares_search(channel_, "google.com.", ns_c_in, ns_t_ns,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchMX) {
SearchResult result;
ares_search(channel_, "google.com.", ns_c_in, ns_t_mx,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchTXT) {
SearchResult result;
ares_search(channel_, "google.com.", ns_c_in, ns_t_txt,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchSOA) {
SearchResult result;
ares_search(channel_, "google.com.", ns_c_in, ns_t_soa,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchSRV) {
SearchResult result;
ares_search(channel_, "_imap._tcp.gmail.com.", ns_c_in, ns_t_srv,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveSearchANY) {
SearchResult result;
ares_search(channel_, "google.com.", ns_c_in, ns_t_any,
SearchCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV4) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
sockaddr.sin_addr.s_addr = htonl(0x08080808);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
if (verbose) std::cerr << "8.8.8.8:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV6) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6;
sockaddr.sin6_port = htons(53);
memcpy(sockaddr.sin6_addr.s6_addr, gdns_addr6, 16);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_TCP|ARES_NI_NOFQDN, // Neither specified => assume lookup host.
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
if (verbose) std::cerr << "[2001:4860:4860::8888]:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV4Numeric) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
sockaddr.sin_addr.s_addr = htonl(0x08080808);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_TCP|ARES_NI_NUMERICHOST,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("8.8.8.8", result.node_);
if (verbose) std::cerr << "8.8.8.8:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV6Numeric) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6;
sockaddr.sin6_port = htons(53);
memcpy(sockaddr.sin6_addr.s6_addr, gdns_addr6, 16);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_DCCP|ARES_NI_NUMERICHOST,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("2001:4860:4860::8888%0", result.node_);
if (verbose) std::cerr << "[2001:4860:4860::8888]:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV6LinkLocal) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6;
sockaddr.sin6_port = htons(53);
unsigned char addr6[16] = {0xfe, 0x80, 0x01, 0x02, 0x01, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x04};
memcpy(sockaddr.sin6_addr.s6_addr, addr6, 16);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_DCCP|ARES_NI_NUMERICHOST,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("fe80:102:102::304%0", result.node_);
if (verbose) std::cerr << "[fe80:102:102::304]:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV4NotFound) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(4); // Port 4 unassigned at IANA
// RFC5737 says 192.0.2.0 should not be used publically.
sockaddr.sin_addr.s_addr = htonl(0xC0000200);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("192.0.2.0", result.node_);
if (verbose) std::cerr << "192.0.2.0:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV4NotFoundFail) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
// RFC5737 says 192.0.2.0 should not be used publically.
sockaddr.sin_addr.s_addr = htonl(0xC0000200);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP|ARES_NI_NAMEREQD,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTFOUND, result.status_);
}
TEST_F(DefaultChannelTest, LiveGetNameInfoV6NotFound) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6;
sockaddr.sin6_port = htons(53);
// 2001:db8::/32 is only supposed to be used in documentation.
unsigned char addr6[16] = {0x20, 0x01, 0x0d, 0xb8, 0x01, 0x02, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x04};
memcpy(sockaddr.sin6_addr.s6_addr, addr6, 16);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("2001:db8:102::304%0", result.node_);
if (verbose) std::cerr << "[2001:db8:102::304]:53 => " << result.node_ << "/" << result.service_ << std::endl;
}
TEST_F(DefaultChannelTest, LiveGetNameInvalidFamily) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6 + AF_INET;
sockaddr.sin6_port = htons(53);
memcpy(sockaddr.sin6_addr.s6_addr, gdns_addr6, 16);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOTIMP, result.status_);
}
TEST_F(DefaultChannelTest, LiveGetNameInvalidFlags) {
NameInfoResult result;
struct sockaddr_in6 sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin6_family = AF_INET6;
sockaddr.sin6_port = htons(53);
memcpy(sockaddr.sin6_addr.s6_addr, gdns_addr6, 16);
// Ask for both a name-required, and a numeric host.
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP|ARES_NI_NUMERICHOST|ARES_NI_NAMEREQD,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_EBADFLAGS, result.status_);
}
TEST_F(DefaultChannelTest, LiveGetServiceInfo) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
sockaddr.sin_addr.s_addr = htonl(0x08080808);
// Just look up service info
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPSERVICE|ARES_NI_SCTP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("", result.node_);
}
TEST_F(DefaultChannelTest, LiveGetServiceInfoNumeric) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
sockaddr.sin_addr.s_addr = htonl(0x08080808);
// Just look up service info
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPSERVICE|ARES_NI_SCTP|ARES_NI_NUMERICSERV,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_SUCCESS, result.status_);
EXPECT_EQ("", result.node_);
EXPECT_EQ("53", result.service_);
}
TEST_F(DefaultChannelTest, LiveGetNameInfoAllocFail) {
NameInfoResult result;
struct sockaddr_in sockaddr;
memset(&sockaddr, 0, sizeof(sockaddr));
sockaddr.sin_family = AF_INET;
sockaddr.sin_port = htons(53);
sockaddr.sin_addr.s_addr = htonl(0x08080808);
SetAllocFail(1);
ares_getnameinfo(channel_, (const struct sockaddr*)&sockaddr, sizeof(sockaddr),
ARES_NI_LOOKUPHOST|ARES_NI_LOOKUPSERVICE|ARES_NI_UDP,
NameInfoCallback, &result);
Process();
EXPECT_TRUE(result.done_);
EXPECT_EQ(ARES_ENOMEM, result.status_);
}
TEST_F(DefaultChannelTest, GetSock) {
ares_socket_t socks[3] = {-1, -1, -1};
int bitmask = ares_getsock(channel_, socks, 3);
EXPECT_EQ(0, bitmask);
bitmask = ares_getsock(channel_, nullptr, 0);
EXPECT_EQ(0, bitmask);
// Ask again with a pending query.
HostResult result;
ares_gethostbyname(channel_, "www.google.com.", AF_INET, HostCallback, &result);
bitmask = ares_getsock(channel_, socks, 3);
EXPECT_NE(0, bitmask);
bitmask = ares_getsock(channel_, nullptr, 0);
EXPECT_EQ(0, bitmask);
Process();
}
TEST_F(LibraryTest, GetTCPSock) {
ares_channel channel;
struct ares_options opts = {0};
opts.tcp_port = 53;
opts.flags = ARES_FLAG_USEVC;
int optmask = ARES_OPT_TCP_PORT | ARES_OPT_FLAGS;
EXPECT_EQ(ARES_SUCCESS, ares_init_options(&channel, &opts, optmask));
EXPECT_NE(nullptr, channel);
ares_socket_t socks[3] = {-1, -1, -1};
int bitmask = ares_getsock(channel, socks, 3);
EXPECT_EQ(0, bitmask);
bitmask = ares_getsock(channel, nullptr, 0);
EXPECT_EQ(0, bitmask);
// Ask again with a pending query.
HostResult result;
ares_gethostbyname(channel, "www.google.com.", AF_INET, HostCallback, &result);
bitmask = ares_getsock(channel, socks, 3);
EXPECT_NE(0, bitmask);
bitmask = ares_getsock(channel, nullptr, 0);
EXPECT_EQ(0, bitmask);
ProcessWork(channel, -1, nullptr);
ares_destroy(channel);
}
} // namespace test
} // namespace ares