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348 | // Copyright (C) 2014-2023 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/testutils/iface_mgr_test_config.h>
#include <dhcp6/json_config_parser.h>
#include <dhcp6/tests/dhcp6_message_test.h>
#include <dhcpsrv/utils.h>
using namespace isc;
using namespace isc::asiolink;
using namespace isc::data;
using namespace isc::dhcp;
using namespace isc::dhcp::test;
namespace {
/// @brief Set of JSON configurations used throughout the Confirm tests.
///
/// - Configuration 0:
/// - only addresses (no prefixes)
/// - 2 subnets with 2001:db8:1::/64 and 2001:db8:2::/64
/// - 1 subnet for eth0 and 1 subnet for eth1
///
/// - Configuration 1:
/// - similar to Configuration 0
/// - pools configured: 3000:1::/64 and 3000:2::/64
/// - this specific configuration is used by tests using relays
///
const char* CONFIRM_CONFIGS[] = {
// Configuration 0
"{ \"interfaces-config\": {"
" \"interfaces\": [ \"*\" ]"
"},"
"\"preferred-lifetime\": 3000,"
"\"rebind-timer\": 2000, "
"\"renew-timer\": 1000, "
"\"subnet6\": [ { "
" \"id\": 1, "
" \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ],"
" \"subnet\": \"2001:db8:1::/48\", "
" \"interface-id\": \"\","
" \"interface\": \"eth0\""
" },"
" {"
" \"id\": 2, "
" \"pools\": [ { \"pool\": \"2001:db8:2::/64\" } ],"
" \"subnet\": \"2001:db8:2::/48\", "
" \"interface-id\": \"\","
" \"interface\": \"eth1\""
" } ],"
"\"valid-lifetime\": 4000 }",
// Configuration 1
"{ \"interfaces-config\": {"
" \"interfaces\": [ \"*\" ]"
"},"
"\"preferred-lifetime\": 3000,"
"\"rebind-timer\": 2000, "
"\"renew-timer\": 1000, "
"\"subnet6\": [ { "
" \"id\": 1, "
" \"pools\": [ { \"pool\": \"3000:1::/64\" } ],"
" \"subnet\": \"3000:1::/48\", "
" \"interface-id\": \"\","
" \"interface\": \"eth0\""
" },"
" {"
" \"id\": 2, "
" \"pools\": [ { \"pool\": \"3000:2::/64\" } ],"
" \"subnet\": \"3000:2::/48\", "
" \"interface-id\": \"\","
" \"interface\": \"eth1\""
" } ],"
"\"valid-lifetime\": 4000 }"
};
/// @brief Test fixture class for testing Confirm..
class ConfirmTest : public isc::dhcp::test::Dhcpv6MessageTest {
public:
/// @brief Constructor.
///
/// Sets up fake interfaces.
ConfirmTest()
: Dhcpv6MessageTest() {
}
};
// Test that client-id is mandatory and server-id forbidden for Confirm messages
TEST_F(ConfirmTest, sanityCheck) {<--- syntax error
NakedDhcpv6Srv srv(0);
// A message with no client-id should fail
Pkt6Ptr confirm = Pkt6Ptr(new Pkt6(DHCPV6_CONFIRM, 1234));
EXPECT_FALSE(srv.sanityCheck(confirm));
// A message with a single client-id should succeed
OptionPtr clientid = generateClientId();
confirm->addOption(clientid);
EXPECT_TRUE(srv.sanityCheck(confirm));
// A message with server-id present should fail
confirm->addOption(srv.getServerID());
EXPECT_FALSE(srv.sanityCheck(confirm));
}
// Test that directly connected client's Confirm message is processed and Reply
// message is sent back. In this test case, the client sends Confirm for two
// addresses that belong to the same IAID and are sent within the same IA_NA
// option (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, directClientSameIAID) {
Dhcp6Client client;
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[0], 2, client));
// Keep the client's lease for future reference.
Lease6 lease_client1 = client.getLease(0);
// Clone the lease and modify its address so as it is still in the range
// of the subnet to which the first lease belongs. When the client sends
// the Confirm it should include both addresses and the server should
// send Success because both of these addresses are on-link, regardless
// what the server has in the lease database.
Lease6 lease_client2 = lease_client1;
lease_client2.addr_ = bumpAddress(lease_client2.addr_);
client.createLease(lease_client2);
ASSERT_EQ(2, client.getLeaseNum());
// Send Confirm message to the server.
ASSERT_NO_THROW(client.doConfirm());
// Client should have received a status code option and this option should
// indicate the success.
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_Success, client.getStatusCode());
ASSERT_EQ(2, client.getLeaseNum());
lease_client2 = client.getLease(1);
lease_client2.addr_ = bumpSubnet(lease_client2.addr_);
client.createLease(lease_client2);
// Send confirm to the server. This time, one of the leases contains the
// address which doesn't belong to the configured subnet and the server
// should respond with STATUS_NotOnLink.
ASSERT_NO_THROW(client.doConfirm());
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_NotOnLink, client.getStatusCode());
// Make sure that the server id has been included.
EXPECT_TRUE(client.getContext().response_->getOption(D6O_SERVERID));
}
// Test that directly connected client's Confirm message is processed and Reply
// message is sent back. In this test case, the client sends Confirm for two
// addresses that belong to different IAIDs and are sent within the different
// IA_NA options (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, directClientDifferentIAID) {
Dhcp6Client client;
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[0], 2, client));
// Keep the client's lease for future reference.
Lease6 lease_client1 = client.getLease(0);
// Clone the lease and modify its address so as it is still in the range
// of the subnet to which the first lease belongs. When the client sends
// the Confirm it should include both addresses and the server should
// send Success because both of these addresses are on-link, regardless
// what the server has in the lease database.
Lease6 lease_client2 = lease_client1;
++lease_client2.iaid_;
lease_client2.addr_ = bumpAddress(lease_client2.addr_);
client.createLease(lease_client2);
ASSERT_EQ(2, client.getLeaseNum());
// Send Confirm message to the server.
ASSERT_NO_THROW(client.doConfirm());
// Client should have received a status code option and this option should
// indicate the success.
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_Success, client.getStatusCode());
// Make sure that the server id and client id have been included.
EXPECT_TRUE(client.getContext().response_->getOption(D6O_SERVERID));
EXPECT_TRUE(client.getContext().response_->getOption(D6O_CLIENTID));
ASSERT_EQ(2, client.getLeaseNum());
lease_client2 = client.getLease(1);
lease_client2.addr_ = bumpSubnet(lease_client2.addr_);
client.createLease(lease_client2);
// Send confirm to the server. This time, one of the leases contains the
// address which doesn't belong to the configured subnet and the server
// should respond with STATUS_NotOnLink.
ASSERT_NO_THROW(client.doConfirm());
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_NotOnLink, client.getStatusCode());
// Make sure that the server id have been included.
EXPECT_TRUE(client.getContext().response_->getOption(D6O_SERVERID));
EXPECT_TRUE(client.getContext().response_->getOption(D6O_CLIENTID));
}
// Test that relayed client's Confirm message is processed and Reply message
// is sent back (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, relayedClient) {
Dhcp6Client client;
// Client to send relayed message.
client.useRelay();
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[1], 2, client));
// Keep the client's lease for future reference.
Lease6 lease_client1 = client.getLease(0);
// Clone the lease and modify its address so as it is still in the range
// of the subnet to which the first lease belongs. When the client sends
// the Confirm it should include both addresses and the server should
// send Success because both of these addresses are on-link, regardless
// what the server has in the lease database.
Lease6 lease_client2 = lease_client1;
lease_client2.addr_ = bumpAddress(lease_client2.addr_);
++lease_client2.iaid_;
client.createLease(lease_client2);
// Send Confirm message to the server.
ASSERT_NO_THROW(client.doConfirm());
// Client should have received a status code option and this option should
// indicate the success.
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_Success, client.getStatusCode());
lease_client2 = client.getLease(1);
lease_client2.addr_ = bumpSubnet(lease_client2.addr_);
client.createLease(lease_client2);
// Send confirm to the server. This time, one of the leases contains the
// address which doesn't belong to the configured subnet and the server
// should respond with STATUS_NotOnLink.
ASSERT_NO_THROW(client.doConfirm());
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_NotOnLink, client.getStatusCode());
// Make sure that the server id and client id have been included.
EXPECT_TRUE(client.getContext().response_->getOption(D6O_SERVERID));
EXPECT_TRUE(client.getContext().response_->getOption(D6O_CLIENTID));
}
// Test that the Confirm message without any addresses is discarded
// (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, relayedClientNoAddress) {
Dhcp6Client client;
// Configure the server.
configure(CONFIRM_CONFIGS[1], *client.getServer());
// Make sure we ended-up having expected number of subnets configured.
const Subnet6Collection* subnets =
CfgMgr::instance().getCurrentCfg()->getCfgSubnets6()->getAll();
ASSERT_EQ(2, subnets->size());
// Client to send relayed message.
client.useRelay();
// Send Confirm message to the server. This message will contain no
// addresses because client has no leases.
ASSERT_NO_THROW(client.doConfirm());
EXPECT_FALSE(client.getContext().response_);
}
// This test checks that the server processes Confirm message correctly if
// the subnet can't be selected for the client (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, relayedClientNoSubnet) {
Dhcp6Client client;
// Client to send relayed message.
client.useRelay();
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[1], 2, client));
// Now that the client has a lease, let's remove any subnets to check
// how the server would respond to the Confirm.
ASSERT_NO_THROW(CfgMgr::instance().clear());
// Send Confirm message to the server.
ASSERT_NO_THROW(client.doConfirm());
// Client should have received a status code option and this option should
// indicate that the client is NotOnLink because subnet could not be
// selected.
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_NotOnLink, client.getStatusCode());
// Let's test another case that the client sends no addresses in the Confirm
// message. The subnet can't be selected for that client as in the previous
// case but this time the server must discard the client's message because
// it contains no addresses (is invalid).
// Set lifetimes to 0 so as the Confirm will ignore the specific address
// and send an empty IA_NA.
client.config_.leases_[0].preferred_lft_ = 0;
client.config_.leases_[0].valid_lft_ = 0;
ASSERT_NO_THROW(client.doConfirm());
EXPECT_FALSE(client.getContext().response_);
// Do similar test but this time remove the lease so as no IA_NA option
// is sent.
client.config_.clear();
ASSERT_NO_THROW(client.doConfirm());
EXPECT_FALSE(client.getContext().response_);
}
// This test checks that the relayed Confirm message is processed by the server
// when sent to unicast address.
TEST_F(ConfirmTest, relayedUnicast) {
Dhcp6Client client;
// Client to send relayed message.
client.useRelay();
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[1], 2, client));
// Make sure we have got the lease.
ASSERT_GT(client.getLeaseNum(), 0);
client.setDestAddress(IOAddress("2001:db8:1::1"));
// Send Confirm message to the server.
ASSERT_NO_THROW(client.doConfirm());
// Client should have received a response.
ASSERT_TRUE(client.getContext().response_);
// Client should have received a status code option and this option should
// indicate the success.
ASSERT_TRUE(client.receivedStatusCode());
ASSERT_EQ(STATUS_Success, client.getStatusCode());
// Make sure that the server id and client id have been included.
EXPECT_TRUE(client.getContext().response_->getOption(D6O_SERVERID));
EXPECT_TRUE(client.getContext().response_->getOption(D6O_CLIENTID));
}
// This test checks that the Confirm message is discarded by the server if it
// has been sent to unicast address (RFC 8415, section 18.3.3).
TEST_F(ConfirmTest, unicast) {
Dhcp6Client client;
// Configure client to request IA_NA.
client.requestAddress();
// Make 4-way exchange to get the lease.
ASSERT_NO_FATAL_FAILURE(requestLease(CONFIRM_CONFIGS[0], 2, client));
// Make sure the client has got the lease.
ASSERT_GT(client.getLeaseNum(), 0);
// Send Confirm message to the server to the unicast address.
client.setDestAddress(IOAddress("2001:db8:1::1"));
ASSERT_NO_THROW(client.doConfirm());
// Mak sure that the server discarded client's Confirm message.
EXPECT_FALSE(client.getContext().response_);
}
} // end of anonymous namespace
|