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843 | // Copyright (C) 2018-2023 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#include <config.h>
#include <asiolink/io_address.h>
#include <cc/data.h>
#include <dhcp/dhcp4.h>
#include <dhcp/testutils/iface_mgr_test_config.h>
#include <dhcpsrv/cfgmgr.h>
#include <dhcpsrv/host.h>
#include <dhcpsrv/host_mgr.h>
#include <dhcpsrv/subnet_id.h>
#include <dhcp4/tests/dhcp4_test_utils.h>
#include <dhcp4/tests/dhcp4_client.h>
#include <boost/shared_ptr.hpp><--- Include file: not found. Please note: Cppcheck does not need standard library headers to get proper results.
#include <stats/stats_mgr.h>
using namespace isc;
using namespace isc::asiolink;
using namespace isc::data;
using namespace isc::dhcp;
using namespace isc::dhcp::test;
using namespace isc::stats;
namespace {
/// @brief Set of JSON configuration(s) used throughout the Host tests.
///
/// - Configuration 0:
/// - Used for testing global host reservations
/// - 5 global reservations
/// - 1 subnet: 10.0.0.0/24
const char* CONFIGS[] = {
// Configuration 0
// 1 subnet, global only,
// global reservations for different identifier types
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"host-reservation-identifiers\": [ \"circuit-id\", \"hw-address\",\n"
" \"duid\", \"client-id\" ],\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"hw-host-dynamic\"\n"
"},\n"
"{\n"
" \"hw-address\": \"01:02:03:04:05:06\",\n"
" \"hostname\": \"hw-host-fixed-out-of-range\",\n"
" \"ip-address\": \"192.0.1.77\"\n"
"},\n"
"{\n"
" \"hw-address\": \"02:02:03:04:05:06\",\n"
" \"hostname\": \"hw-host-fixed-in-range\",\n"
" \"ip-address\": \"10.0.0.77\"\n"
"},\n"
"{\n"
" \"duid\": \"01:02:03:04:05\",\n"
" \"hostname\": \"duid-host\"\n"
"},\n"
"{\n"
" \"circuit-id\": \"'charter950'\",\n"
" \"hostname\": \"circuit-id-host\"\n"
"},\n"
"{\n"
" \"client-id\": \"01:11:22:33:44:55:66\",\n"
" \"hostname\": \"client-id-host\"\n"
"}\n"
"],\n"
"\"valid-lifetime\": 600,\n"
"\"subnet4\": [ { \n"
" \"subnet\": \"10.0.0.0/24\",\n"
" \"id\": 10,\n"
" \"reservations-global\": true,\n"
" \"reservations-in-subnet\": false,\n"
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ]\n"
"} ]\n"
"}\n"
,
// Configuration 1 global vs in-subnet
// 2 subnets, one default reservations flags (aka in-subnet),
// one reservations flags global only
// Host reservations for the same client, one global, one in each subnet
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"global-host\"\n"
"}\n"
"],\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ],\n"
" \"interface\": \"eth0\",\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-10-host\"\n"
" }]\n"
" },\n"
" {\n"
" \"subnet\": \"192.0.2.0/26\", \n"
" \"id\": 20,"
" \"pools\": [ { \"pool\": \"192.0.2.10-192.0.2.63\" } ],\n"
" \"interface\": \"eth1\",\n"
" \"reservations-global\": true,\n"
" \"reservations-in-subnet\": false,\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-20-host\"\n"
" }]\n"
" }\n"
"]\n"
"}\n"
,
// Configuration 2 global and in-subnet with out-of-pool
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"global-host\"\n"
"}\n"
"],\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ],\n"
" \"interface\": \"eth0\",\n"
" \"reservations-global\": false,\n"
" \"reservations-in-subnet\": true,\n"
" \"reservations-out-of-pool\": true,\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-10-host\",\n"
" \"ip-address\": \"10.0.0.105\"\n"
" }]\n"
" }\n"
"]\n"
"}\n"
,
// Configuration 3 global and in-subnet
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"global-host\"\n"
"}\n"
"],\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ],\n"
" \"interface\": \"eth0\",\n"
" \"reservations-global\": false,\n"
" \"reservations-in-subnet\": true,\n"
" \"reservations-out-of-pool\": false,\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-10-host\",\n"
" \"ip-address\": \"10.0.0.105\"\n"
" }]\n"
" }\n"
"]\n"
"}\n"
,
// Configuration 4 client-class reservation in global, shared network
// and client-class guarded pools.
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"client-classes\": ["
"{"
" \"name\": \"reserved_class\""
"},"
"{"
" \"name\": \"unreserved_class\","
" \"test\": \"not member('reserved_class')\""
"}"
"],\n"
"\"reservations-global\": true,\n"
"\"reservations-in-subnet\": false,\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:fe\",\n"
" \"client-classes\": [ \"reserved_class\" ]\n"
"}\n"
"],\n"
"\"shared-networks\": [{"
" \"name\": \"frog\",\n"
" \"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"pools\": ["
" {"
" \"pool\": \"10.0.0.10-10.0.0.11\","
" \"client-class\": \"reserved_class\""
" }"
" ],\n"
" \"interface\": \"eth0\"\n"
" },\n"
" {\n"
" \"subnet\": \"192.0.3.0/24\", \n"
" \"id\": 11,"
" \"pools\": ["
" {"
" \"pool\": \"192.0.3.10-192.0.3.11\","
" \"client-class\": \"unreserved_class\""
" }"
" ],\n"
" \"interface\": \"eth0\"\n"
" }\n"
" ]\n"
"}]\n"
"}",
// Configuration 5 client-class reservation in global, shared network
// and client-class guarded subnets.
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"client-classes\": ["
"{"
" \"name\": \"reserved_class\""
"},"
"{"
" \"name\": \"unreserved_class\","
" \"test\": \"not member('reserved_class')\""
"}"
"],\n"
"\"reservations-global\": true,\n"
"\"reservations-in-subnet\": false,\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:fe\",\n"
" \"client-classes\": [ \"reserved_class\" ]\n"
"}\n"
"],\n"
"\"shared-networks\": [{"
" \"name\": \"frog\",\n"
" \"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"client-class\": \"reserved_class\","
" \"pools\": ["
" {"
" \"pool\": \"10.0.0.10-10.0.0.10\""
" }"
" ],\n"
" \"interface\": \"eth0\"\n"
" },\n"
" {\n"
" \"subnet\": \"192.0.3.0/24\", \n"
" \"id\": 11,"
" \"client-class\": \"unreserved_class\","
" \"pools\": ["
" {"
" \"pool\": \"192.0.3.10-192.0.3.10\""
" }"
" ],\n"
" \"interface\": \"eth0\"\n"
" }\n"
" ]\n"
"}]\n"
"}",
// Configuration 6 client-class reservation and client-class guarded pools.
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"client-classes\": ["
"{"
" \"name\": \"reserved_class\""
"},"
"{"
" \"name\": \"unreserved_class\","
" \"test\": \"not member('reserved_class')\""
"}"
"],\n"
"\"valid-lifetime\": 600,\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"reservations\": [{ \n"
" \"hw-address\": \"aa:bb:cc:dd:ee:fe\",\n"
" \"client-classes\": [ \"reserved_class\" ]\n"
" }],\n"
" \"pools\": ["
" {"
" \"pool\": \"10.0.0.10-10.0.0.11\","
" \"client-class\": \"reserved_class\""
" },"
" {"
" \"pool\": \"10.0.0.20-10.0.0.21\","
" \"client-class\": \"unreserved_class\""
" }"
" ],\n"
" \"interface\": \"eth0\"\n"
" }\n"
"]\n"
"}",
// Configuration 7 multiple reservations for the same IP address.
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"valid-lifetime\": 600,\n"
"\"ip-reservations-unique\": false,\n"
"\"host-reservation-identifiers\": [ \"hw-address\" ],\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\",\n"
" \"id\": 10,\n"
" \"reservations\": [\n"
" { \n"
" \"hw-address\": \"aa:bb:cc:dd:ee:fe\",\n"
" \"ip-address\": \"10.0.0.123\"\n"
" },\n"
" { \n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"ip-address\": \"10.0.0.123\"\n"
" }\n"
" ],\n"
" \"pools\": [\n"
" {\n"
" \"pool\": \"10.0.0.10-10.0.0.255\"\n"
" }\n"
" ],\n"
" \"interface\": \"eth0\"\n"
" }\n"
"]\n"
"}",
// Configuration 8 both global and in-subnet
// 2 subnets, one default reservations flags (aka in-subnet),
// one reservations flags global and in-subnet.
// Host reservations for the same client, one global, one in each subnet
"{ \"interfaces-config\": {\n"
" \"interfaces\": [ \"*\" ]\n"
"},\n"
"\"valid-lifetime\": 600,\n"
"\"reservations\": [ \n"
"{\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"global-host\"\n"
"}\n"
"],\n"
"\"subnet4\": [\n"
" {\n"
" \"subnet\": \"10.0.0.0/24\", \n"
" \"id\": 10, \n"
" \"pools\": [ { \"pool\": \"10.0.0.10-10.0.0.100\" } ],\n"
" \"interface\": \"eth0\",\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-10-host\"\n"
" }]\n"
" },\n"
" {\n"
" \"subnet\": \"192.0.2.0/26\", \n"
" \"id\": 20,"
" \"pools\": [ { \"pool\": \"192.0.2.10-192.0.2.63\" } ],\n"
" \"interface\": \"eth1\",\n"
" \"reservations-global\": true,\n"
" \"reservations-in-subnet\": true,\n"
" \"reservations-out-of-pool\": false,\n"
" \"reservations\": [ \n"
" {\n"
" \"hw-address\": \"aa:bb:cc:dd:ee:ff\",\n"
" \"hostname\": \"subnet-20-host\"\n"
" }]\n"
" }\n"
"]\n"
"}\n"
};
/// @brief Test fixture class for testing global v4 reservations.
class HostTest : public Dhcpv4SrvTest {
public:
/// @brief Constructor.
///
/// Sets up fake interfaces.
HostTest()
: Dhcpv4SrvTest(),
iface_mgr_test_config_(true) {
// Let's wipe all existing statistics.
isc::stats::StatsMgr::instance().removeAll();
}
/// @brief Destructor.
///
/// Cleans up statistics after the test.
~HostTest() {
// Let's wipe all existing statistics.
isc::stats::StatsMgr::instance().removeAll();
}
/// @brief Interface Manager's fake configuration control.
IfaceMgrTestConfig iface_mgr_test_config_;
/// @brief Conducts DORA exchange and checks assigned address and hostname
///
/// If expected_host is empty, the test expects the hostname option to not
/// be assigned.
///
/// @param config configuration to be used
/// @param client reference to a client instance
/// @param expected_host expected hostname to be assigned (may be empty)
/// @param expected_addr expected address to be assigned
void runDoraTest(const std::string& config, Dhcp4Client& client,
const std::string& expected_host,
const std::string& expected_addr,
const std::string& requested_addr = "") {
// Configure DHCP server.
ASSERT_NO_FATAL_FAILURE(configure(config, *client.getServer()));
client.requestOptions(DHO_HOST_NAME);
// Perform 4-way exchange with the server but to not request any
// specific address in the DHCPDISCOVER message.
boost::shared_ptr<IOAddress> hint;
if (!requested_addr.empty()) {
hint = boost::make_shared<IOAddress>(requested_addr);
}
ASSERT_NO_THROW(client.doDORA(hint));
// Make sure that the server responded.
ASSERT_TRUE(client.getContext().response_);
Pkt4Ptr resp = client.getContext().response_;
// Make sure that the server has responded with DHCPACK.
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Fetch the hostname option
OptionStringPtr hostname = boost::dynamic_pointer_cast<
OptionString>(resp->getOption(DHO_HOST_NAME));
if (expected_host.empty()) {
ASSERT_FALSE(hostname);
} else {
ASSERT_TRUE(hostname);
EXPECT_EQ(expected_host, hostname->getValue());
}
EXPECT_EQ(client.config_.lease_.addr_.toText(), expected_addr);
}
/// @brief Test pool or subnet selection using global class reservation.
///
/// Verifies that client class specified in the global reservation
/// may be used to influence pool or subnet selection.
///
/// @param config_idx Index of the server configuration from the
/// @c CONFIGS array.
/// @param first_address Address to be allocated from the pool having
/// a reservation.
/// @param second_address Address to be allocated from the pool not
/// having a reservation.
void testGlobalClassSubnetPoolSelection(const int config_idx,
const std::string& first_address = "10.0.0.10",
const std::string& second_address = "192.0.3.10") {
Dhcp4Client client_resrv(Dhcp4Client::SELECTING);
// Use HW address for which we have host reservation including
// client class.
client_resrv.setHWAddress("aa:bb:cc:dd:ee:fe");
client_resrv.setIfaceName("eth0");
client_resrv.setIfaceIndex(ETH0_INDEX);
ASSERT_NO_FATAL_FAILURE(configure(CONFIGS[config_idx], *client_resrv.getServer()));
// This client should be given an address from the 10.0.0.0/24 pool.
// Let's use the 192.0.3.10 as a hint to make sure that the server
// refuses allocating it and uses the sole pool available for this
// client.
ASSERT_NO_THROW(client_resrv.doDORA(boost::make_shared<IOAddress>(second_address)));
ASSERT_TRUE(client_resrv.getContext().response_);
auto resp = client_resrv.getContext().response_;
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
EXPECT_EQ(first_address, resp->getYiaddr().toText());
// This client has no reservation and therefore should be
// assigned to the unreserved_class and be given an address
// from the other pool.
Dhcp4Client client_no_resrv(client_resrv.getServer(), Dhcp4Client::SELECTING);
client_no_resrv.setHWAddress("aa:bb:cc:dd:ee:ff");
client_no_resrv.setIfaceName("eth0");
client_no_resrv.setIfaceIndex(ETH0_INDEX);
// Let's use the address of 10.0.0.10 as a hint to make sure that the
// server refuses it in favor of the 192.0.3.10.
ASSERT_NO_THROW(client_no_resrv.doDORA(boost::make_shared<IOAddress>(first_address)));
ASSERT_TRUE(client_no_resrv.getContext().response_);
resp = client_no_resrv.getContext().response_;
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
EXPECT_EQ(second_address, resp->getYiaddr().toText());
}
/// @brief Test that two clients having reservations for the same IP
/// address are offered the reserved lease.
///
/// This test verifies the case when two clients have reservations for
/// the same IP address. The first client sends DHCPDICOVER and is
/// offered the reserved address. At the same time, the second client
/// having the reservation for the same IP address performs 4-way
/// exchange using the reserved address as a hint in DHCPDISCOVER.
/// The client gets the lease for this address. This test verifies
/// that the allocation engine correctly identifies that the second
/// client has a reservation for this address. In order to verify
/// that the allocation engine must fetch all reservations for the
/// reserved address and verifies that one of them belongs to the
/// second client.
///
/// @param hw_address1 Hardware address of the first client having
/// the reservation.
/// @param hw_address2 Hardware address of the second client having
/// the reservation.
void testMultipleClientsRace(const std::string& hw_address1,
const std::string& hw_address2) {
// Create first client having the reservation.
Dhcp4Client client1(Dhcp4Client::SELECTING);
client1.setHWAddress(hw_address1);
// Configure the server.
ASSERT_NO_FATAL_FAILURE(configure(CONFIGS[7], *client1.getServer()));
// Sends DHCPDISCOVER and make sure the client is offered the
// reserved IP address.
client1.doDiscover(boost::make_shared<IOAddress>("10.0.0.123"));
ASSERT_TRUE(client1.getContext().response_);
Pkt4Ptr resp = client1.getContext().response_;
ASSERT_EQ(DHCPOFFER, static_cast<int>(resp->getType()));
EXPECT_EQ("10.0.0.123", resp->getYiaddr().toText());
// Create the second client matching the second reservation for
// the given IP address.
Dhcp4Client client2(client1.getServer(), Dhcp4Client::SELECTING);
client2.setHWAddress(hw_address2);
// Make sure that the second client gets the reserved lease.
client2.doDORA(boost::make_shared<IOAddress>("10.0.0.123"));
ASSERT_TRUE(client2.getContext().response_);
resp = client2.getContext().response_;
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
EXPECT_EQ("10.0.0.123", resp->getYiaddr().toText());
}
};
// Verifies that a client, which fails to match to a global
// reservation, still gets a dynamic address when subnet reservations
// flags are global only.
TEST_F(HostTest, globalHardwareNoMatch) {<--- syntax error
Dhcp4Client client(Dhcp4Client::SELECTING);
client.setHWAddress("99:99:99:99:99:99");
runDoraTest(CONFIGS[0], client, "", "10.0.0.10");
}
// Verifies that a client, that matches to a global hostname
// reservation, gets both the hostname and a dynamic address,
// when the subnet reservations flags are global only.
TEST_F(HostTest, globalHardwareDynamicAddress) {
Dhcp4Client client(Dhcp4Client::SELECTING);
client.setHWAddress("aa:bb:cc:dd:ee:ff");
runDoraTest(CONFIGS[0], client, "hw-host-dynamic", "10.0.0.10");
}
// Verifies that a client matched to a global in-subnet address reservation
// gets both the hostname and the reserved address when the subnet reservations
// flags are global only.
TEST_F(HostTest, globalHardwareFixedAddressInRange) {
Dhcp4Client client(Dhcp4Client::SELECTING);
client.setHWAddress("02:02:03:04:05:06");
runDoraTest(CONFIGS[0], client, "hw-host-fixed-in-range", "10.0.0.77");
}
// Verifies that a client matched to a global out-of-range address reservation
// gets the hostname and a dynamic address when the subnet reservations
// flags are global only.
TEST_F(HostTest, globalHardwareFixedAddressOutOfRange) {
Dhcp4Client client(Dhcp4Client::SELECTING);
client.setHWAddress("01:02:03:04:05:06");
runDoraTest(CONFIGS[0], client, "hw-host-fixed-out-of-range", "10.0.0.10");
}
// Verifies that a client can be matched to a global reservation by DUID
TEST_F(HostTest, globalDuid) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Set hw address to a none-matching value
client.setHWAddress("99:99:99:99:99:99");
// - FF is a client identifier type for DUID,
// - 45454545 - represents 4 bytes for IAID
// - 01:02:03:04:05 - is an actual DUID for which there is a
client.includeClientId("FF:45:45:45:45:01:02:03:04:05");
runDoraTest(CONFIGS[0], client, "duid-host", "10.0.0.10");
}
// Verifies that a client can be matched to a global reservation by circuit-id
TEST_F(HostTest, globalCircuitId) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Set hw address to a none-matching value
client.setHWAddress("99:99:99:99:99:99");
// Use relay agent so as the circuit-id can be inserted.
client.useRelay(true, IOAddress("10.0.0.1"), IOAddress("10.0.0.2"));
// Set the circuit id
client.setCircuitId("charter950");
runDoraTest(CONFIGS[0], client, "circuit-id-host", "10.0.0.10");
}
// Verifies that a client can be matched to a global reservation by client-id
TEST_F(HostTest, globalClientID) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Set hw address to a none-matching value
client.setHWAddress("99:99:99:99:99:99");
// - 01 is a client identifier type for CLIENT_ID,
// - 11:22:33:44:55:66 - is an actual DUID for which there is a
client.includeClientId("01:11:22:33:44:55:66");
runDoraTest(CONFIGS[0], client, "client-id-host", "10.0.0.10");
}
// Verifies that even when a matching global reservation exists,
// client will get a subnet scoped reservation, when subnet
// reservations flags are default
TEST_F(HostTest, defaultOverGlobal) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Hardware address matches all reservations
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Subnet 10 uses default reservations flags (i.e. in-subnet), so its
// reservation should be used, rather than global.
runDoraTest(CONFIGS[1], client, "subnet-10-host", "10.0.0.10");
}
// Verifies that when there are matching reservations at
// both the global and subnet levels, client will be matched
// to the global reservation, when subnet reservations flags
// are global only.
TEST_F(HostTest, globalOverSubnet) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Hardware address matches all reservations
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Change to subnet 20
client.setIfaceName("eth1");
client.setIfaceIndex(ETH1_INDEX);
// Subnet 20 uses global only reservations flags, so the global
// reservation should be used, rather than the subnet one.
runDoraTest(CONFIGS[1], client, "global-host", "192.0.2.10");
}
// Verifies that when there are matching reservations at
// both the global and subnet levels, client will be matched
// to the subnet reservation, when subnet reservations flags
// are in-subnet and out-of-pool.
TEST_F(HostTest, outOfPoolOverGlobal) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Hardware address matches all reservations
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Subnet 10 uses in-subnet and out-of-pool reservations flags,
// so its reservation should be used, rather than global.
runDoraTest(CONFIGS[2], client, "subnet-10-host", "10.0.0.105");
}
// Verifies that when there are matching reservations at
// both the global and subnet levels, client will be matched
// to the subnet reservation, when subnet reservations flags
// are in-subnet only.
TEST_F(HostTest, allOverGlobal) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Hardware address matches all reservations
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Subnet 10 uses default reservations flags (i.e. in-subnet), so its
// reservation should be used, rather than global.
runDoraTest(CONFIGS[3], client, "subnet-10-host", "10.0.0.105");
}
// Verifies that when there are matching reservations at
// both the global and subnet levels, client will be matched
// to the subnet reservation, when subnet reservations flags
// are global and in-subnet, i.e. the subnet has the preference.
TEST_F(HostTest, subnetOverGlobal) {
Dhcp4Client client(Dhcp4Client::SELECTING);
// Hardware address matches all reservations
client.setHWAddress("aa:bb:cc:dd:ee:ff");
// Change to subnet 20
client.setIfaceName("eth1");
client.setIfaceIndex(ETH1_INDEX);
// Subnet 20 uses both global and in-subnet reservations flags,
// so the subnet reservation has the preference.
runDoraTest(CONFIGS[8], client, "subnet-20-host", "192.0.2.10");
}
// Verifies that client class specified in the global reservation
// may be used to influence pool selection.
TEST_F(HostTest, clientClassGlobalPoolSelection) {
ASSERT_NO_FATAL_FAILURE(testGlobalClassSubnetPoolSelection(4));
}
// Verifies that client class specified in the global reservation
// may be used to influence subnet selection within shared network.
TEST_F(HostTest, clientClassGlobalSubnetSelection) {
ASSERT_NO_FATAL_FAILURE(testGlobalClassSubnetPoolSelection(5));
}
// Verifies that client class specified in the reservation may be
// used to influence pool selection within a subnet.
TEST_F(HostTest, clientClassPoolSelection) {
ASSERT_NO_FATAL_FAILURE(testGlobalClassSubnetPoolSelection(6, "10.0.0.10", "10.0.0.20"));
}
// Verifies that if the server is configured to allow for specifying
// multiple reservations for the same IP address the first client
// matching the reservation will be given this address. The second
// client will be given a different lease.
TEST_F(HostTest, firstClientGetsReservedAddress) {
// Create a client which has MAC address matching the reservation.
Dhcp4Client client1(Dhcp4Client::SELECTING);
client1.setHWAddress("aa:bb:cc:dd:ee:fe");
// Do 4-way exchange for this client to get the reserved address.
runDoraTest(CONFIGS[7], client1, "", "10.0.0.123");
// Create another client that has a reservation for the same
// IP address.
Dhcp4Client client2(client1.getServer(), Dhcp4Client::SELECTING);
client2.setHWAddress("aa:bb:cc:dd:ee:ff");
// Do 4-way exchange with client2.
ASSERT_NO_THROW(client2.doDORA());
// Make sure that the server responded with DHCPACK.
ASSERT_TRUE(client2.getContext().response_);
Pkt4Ptr resp = client2.getContext().response_;
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
// Even though the client has reservation for this address the
// server should not assign this address because another client
// has taken it already.
EXPECT_NE("10.0.0.123", resp->getYiaddr().toText());
// Ensure stats are being recorded for HR conflicts
ObservationPtr subnet_conflicts = StatsMgr::instance().getObservation(
"subnet[10].v4-reservation-conflicts");
ASSERT_TRUE(subnet_conflicts);
ASSERT_EQ(1, subnet_conflicts->getInteger().first);
subnet_conflicts = StatsMgr::instance().getObservation("v4-reservation-conflicts");
ASSERT_TRUE(subnet_conflicts);
ASSERT_EQ(1, subnet_conflicts->getInteger().first);
// If the client1 releases the reserved lease, the client2 should acquire it.
ASSERT_NO_THROW(client1.doRelease());
// Client2 attempts to renew the currently used lease, but should get the
// DHCPNAK.
client2.setState(Dhcp4Client::RENEWING);
ASSERT_NO_THROW(client2.doRequest());
resp = client2.getContext().response_;
ASSERT_TRUE(resp);
ASSERT_EQ(DHCPNAK, static_cast<int>(resp->getType()));
// The client falls back to 4-way exchange and gets the reserved address.
client2.setState(Dhcp4Client::SELECTING);
ASSERT_NO_THROW(client2.doDORA());
resp = client2.getContext().response_;
ASSERT_TRUE(resp);
ASSERT_EQ(DHCPACK, static_cast<int>(resp->getType()));
EXPECT_EQ("10.0.0.123", resp->getYiaddr().toText());
}
// This test verifies the case when two clients have reservations for
// the same IP address. The first client sends DHCPDICOVER and is
// offered the reserved address. At the same time, the second client
// having the reservation for the same IP address performs 4-way
// exchange using the reserved address as a hint in DHCPDISCOVER.
// The client gets the lease for this address. This test verifies
// that the allocation engine correctly identifies that the second
// client has a reservation for this address. In order to verify
// that the allocation engine must fetch all reservations for the
// reserved address and verifies that one of them belongs to the
// second client.
TEST_F(HostTest, multipleClientsRace1) {
ASSERT_NO_FATAL_FAILURE(testMultipleClientsRace("aa:bb:cc:dd:ee:fe",
"aa:bb:cc:dd:ee:ff"));
}
// This is a second variant of the multipleClientsRace1. The test is almost
// the same but the client matching the second reservation sends DHCPDISCOVER
// first and then the client having the first reservation performs 4-way
// exchange. This is to ensure that the order in which reservations are
// defined does not matter.
TEST_F(HostTest, multipleClientsRace2) {
ASSERT_NO_FATAL_FAILURE(testMultipleClientsRace("aa:bb:cc:dd:ee:ff",
"aa:bb:cc:dd:ee:fe"));
}
} // end of anonymous namespace
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