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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2016 SUSE LINUX GmbH
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include <arpa/nameser_compat.h>
#include "common/dns_resolve.h"
#include "test/common/dns_messages.h"
#include "common/debug.h"
#include "gmock/gmock.h"
#include <sstream>
#define TEST_DEBUG 20
#define dout_subsys ceph_subsys_
using namespace std;
using ::testing::Return;
using ::testing::_;
using ::testing::SetArrayArgument;
using ::testing::DoAll;
using ::testing::StrEq;
class DNSResolverTest : public ::testing::Test {
protected:
void SetUp() override {
g_ceph_context->_conf->subsys.set_log_level(dout_subsys, TEST_DEBUG);
}
void TearDown() override {
DNSResolver::get_instance(nullptr);
}
};
TEST_F(DNSResolverTest, resolve_ip_addr) {
MockResolvHWrapper *resolvH = new MockResolvHWrapper();
int lena = sizeof(ns_query_msg_mon_a_payload);
#ifdef HAVE_RES_NQUERY
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
#else
EXPECT_CALL(*resolvH, res_query(StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
#endif
entity_addr_t addr;
DNSResolver::get_instance(resolvH)->resolve_ip_addr(g_ceph_context,
"mon.a.ceph.com", &addr);
std::ostringstream os;
os << addr;
ASSERT_EQ(os.str(), "v2:192.168.1.11:0/0");
}
TEST_F(DNSResolverTest, resolve_ip_addr_fail) {
MockResolvHWrapper *resolvH = new MockResolvHWrapper();
#ifdef HAVE_RES_NQUERY
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("not_exists.com"), C_IN, T_A,_,_))
.WillOnce(Return(0));
#else
EXPECT_CALL(*resolvH, res_query(StrEq("not_exists.com"), C_IN, T_A,_,_))
.WillOnce(Return(0));
#endif
entity_addr_t addr;
int ret = DNSResolver::get_instance(resolvH)->resolve_ip_addr(g_ceph_context,
"not_exists.com", &addr);
ASSERT_EQ(ret, -1);
std::ostringstream os;
os << addr;
ASSERT_EQ(os.str(), "-");
}
TEST_F(DNSResolverTest, resolve_srv_hosts_empty_domain) {
MockResolvHWrapper *resolvH = new MockResolvHWrapper();
int len = sizeof(ns_search_msg_ok_payload);
int lena = sizeof(ns_query_msg_mon_a_payload);
int lenb = sizeof(ns_query_msg_mon_b_payload);
int lenc = sizeof(ns_query_msg_mon_c_payload);
using ::testing::InSequence;
{
InSequence s;
#ifdef HAVE_RES_NQUERY
EXPECT_CALL(*resolvH, res_nsearch(_, StrEq("_cephmon._tcp"), C_IN, T_SRV, _, _))
.WillOnce(DoAll(SetArrayArgument<4>(ns_search_msg_ok_payload,
ns_search_msg_ok_payload+len), Return(len)));
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
EXPECT_CALL(*resolvH, res_nquery(_, StrEq("mon.c.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_c_payload,
ns_query_msg_mon_c_payload+lenc), Return(lenc)));
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("mon.b.ceph.com"), C_IN, T_A, _,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_b_payload,
ns_query_msg_mon_b_payload+lenb), Return(lenb)));
#else
EXPECT_CALL(*resolvH, res_search(StrEq("_cephmon._tcp"), C_IN, T_SRV, _, _))
.WillOnce(DoAll(SetArrayArgument<3>(ns_search_msg_ok_payload,
ns_search_msg_ok_payload+len), Return(len)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.c.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_c_payload,
ns_query_msg_mon_c_payload+lenc), Return(lenc)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.b.ceph.com"), C_IN, T_A, _,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_b_payload,
ns_query_msg_mon_b_payload+lenb), Return(lenb)));
#endif
}
map<string, DNSResolver::Record> records;
DNSResolver::get_instance(resolvH)->resolve_srv_hosts(g_ceph_context, "cephmon",
DNSResolver::SRV_Protocol::TCP, &records);
ASSERT_EQ(records.size(), (unsigned int)3);
auto it = records.find("mon.a");
ASSERT_NE(it, records.end());
std::ostringstream os;
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.11:6789/0");
os.str("");
ASSERT_EQ(it->second.priority, 10);
ASSERT_EQ(it->second.weight, 40);
it = records.find("mon.b");
ASSERT_NE(it, records.end());
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.12:6789/0");
os.str("");
ASSERT_EQ(it->second.priority, 10);
ASSERT_EQ(it->second.weight, 35);
it = records.find("mon.c");
ASSERT_NE(it, records.end());
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.13:6789/0");
ASSERT_EQ(it->second.priority, 10);
ASSERT_EQ(it->second.weight, 25);
}
TEST_F(DNSResolverTest, resolve_srv_hosts_full_domain) {
MockResolvHWrapper *resolvH = new MockResolvHWrapper();
int len = sizeof(ns_search_msg_ok_payload);
int lena = sizeof(ns_query_msg_mon_a_payload);
int lenb = sizeof(ns_query_msg_mon_b_payload);
int lenc = sizeof(ns_query_msg_mon_c_payload);
using ::testing::InSequence;
{
InSequence s;
#ifdef HAVE_RES_NQUERY
EXPECT_CALL(*resolvH, res_nsearch(_, StrEq("_cephmon._tcp.ceph.com"), C_IN, T_SRV, _, _))
.WillOnce(DoAll(SetArrayArgument<4>(ns_search_msg_ok_payload,
ns_search_msg_ok_payload+len), Return(len)));
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
EXPECT_CALL(*resolvH, res_nquery(_, StrEq("mon.c.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_c_payload,
ns_query_msg_mon_c_payload+lenc), Return(lenc)));
EXPECT_CALL(*resolvH, res_nquery(_,StrEq("mon.b.ceph.com"), C_IN, T_A, _,_))
.WillOnce(DoAll(SetArrayArgument<4>(ns_query_msg_mon_b_payload,
ns_query_msg_mon_b_payload+lenb), Return(lenb)));
#else
EXPECT_CALL(*resolvH, res_search(StrEq("_cephmon._tcp.ceph.com"), C_IN, T_SRV, _, _))
.WillOnce(DoAll(SetArrayArgument<3>(ns_search_msg_ok_payload,
ns_search_msg_ok_payload+len), Return(len)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.a.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_a_payload,
ns_query_msg_mon_a_payload+lena), Return(lena)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.c.ceph.com"), C_IN, T_A,_,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_c_payload,
ns_query_msg_mon_c_payload+lenc), Return(lenc)));
EXPECT_CALL(*resolvH, res_query(StrEq("mon.b.ceph.com"), C_IN, T_A, _,_))
.WillOnce(DoAll(SetArrayArgument<3>(ns_query_msg_mon_b_payload,
ns_query_msg_mon_b_payload+lenb), Return(lenb)));
#endif
}
map<string, DNSResolver::Record> records;
DNSResolver::get_instance(resolvH)->resolve_srv_hosts(g_ceph_context, "cephmon",
DNSResolver::SRV_Protocol::TCP, "ceph.com", &records);
ASSERT_EQ(records.size(), (unsigned int)3);
auto it = records.find("mon.a");
ASSERT_NE(it, records.end());
std::ostringstream os;
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.11:6789/0");
os.str("");
it = records.find("mon.b");
ASSERT_NE(it, records.end());
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.12:6789/0");
os.str("");
it = records.find("mon.c");
ASSERT_NE(it, records.end());
os << it->second.addr;
ASSERT_EQ(os.str(), "v2:192.168.1.13:6789/0");
}
TEST_F(DNSResolverTest, resolve_srv_hosts_fail) {
MockResolvHWrapper *resolvH = new MockResolvHWrapper();
using ::testing::InSequence;
{
InSequence s;
#ifdef HAVE_RES_NQUERY
EXPECT_CALL(*resolvH, res_nsearch(_, StrEq("_noservice._tcp"), C_IN, T_SRV, _, _))
.WillOnce(Return(0));
#else
EXPECT_CALL(*resolvH, res_search(StrEq("_noservice._tcp"), C_IN, T_SRV, _, _))
.WillOnce(Return(0));
#endif
}
map<string, DNSResolver::Record> records;
int ret = DNSResolver::get_instance(resolvH)->resolve_srv_hosts(
g_ceph_context, "noservice", DNSResolver::SRV_Protocol::TCP, "", &records);
ASSERT_EQ(0, ret);
ASSERT_TRUE(records.empty());
}
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