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+// Copyright (C) 2019-2023 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/option_string.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 Rebind 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
+///
+const char* TEE_CONFIGS[] = {
+ // Configuration 0, Timers explicitly set
+ "{ \n"
+ " \"renew-timer\": 1000, \n"
+ " \"rebind-timer\": 2000, \n"
+ " \"preferred-lifetime\": 3000, \n"
+ " \"valid-lifetime\": 4000, \n"
+ " \"subnet6\": [ { \n"
+ " \"interface\": \"eth0\", \n"
+ " \"subnet\": \"2001:db8:1::/48\", \n"
+ " \"id\": 1, \n"
+ " \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ], \n"
+ " \"pd-pools\": [ \n"
+ " { \n"
+ " \"prefix\": \"3000::\", \n "
+ " \"prefix-len\": 72, \n"
+ " \"delegated-len\": 80 \n"
+ " }] \n"
+ " }] \n"
+ "} \n"
+ , // Configuration 1, Calculate default timers
+ "{ \n"
+ " \"preferred-lifetime\": 3000, \n"
+ " \"valid-lifetime\": 4000, \n"
+ " \"subnet6\": [ { \n"
+ " \"interface\": \"eth0\", \n"
+ " \"subnet\": \"2001:db8:1::/48\", \n"
+ " \"id\": 1, \n"
+ " \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ], \n"
+ " \"pd-pools\": [ \n"
+ " { \n"
+ " \"prefix\": \"3000::\", \n "
+ " \"prefix-len\": 72, \n"
+ " \"delegated-len\": 80 \n"
+ " }] \n"
+ " }] \n"
+ "} \n"
+ , // Configuration 2, Calculate custom timers
+ "{ \n"
+ " \"preferred-lifetime\": 3000, \n"
+ " \"valid-lifetime\": 4000, \n"
+ " \"t1-percent\": .45, \n"
+ " \"t2-percent\": .70, \n"
+ " \"subnet6\": [ { \n"
+ " \"interface\": \"eth0\", \n"
+ " \"subnet\": \"2001:db8:1::/48\", \n"
+ " \"id\": 1, \n"
+ " \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ], \n"
+ " \"pd-pools\": [ \n"
+ " { \n"
+ " \"prefix\": \"3000::\", \n "
+ " \"prefix-len\": 72, \n"
+ " \"delegated-len\": 80 \n"
+ " }] \n"
+ " }] \n"
+ "} \n"
+};
+
+/// @brief Test fixture class for testing Rebind.
+class TeeTest : public Dhcpv6MessageTest {
+public:
+
+ /// @brief Constructor.
+ ///
+ /// Sets up fake interfaces.
+ TeeTest()
+ : Dhcpv6MessageTest() {
+ }
+
+ void genRequest(const std::string& config, Dhcp6Client& client,
+ uint32_t exp_leases) {
+ // Configure the server.
+ ASSERT_NO_THROW(configure(config, *client.getServer()));
+
+ // Do the actual 4-way exchange.
+ ASSERT_NO_THROW(client.doSARR());
+
+ // Make sure that we go the expected number of leases.
+ ASSERT_EQ(exp_leases, client.getLeaseNum());
+
+ // Simulate aging of leases, by moving their cltt_ back by 1000s.
+ client.fastFwdTime(1000);
+ }
+};
+
+// This test verifies that explicit values for renew-timer and
+// rebind-timer are used when given.
+TEST_F(TeeTest, explicitTimers) {
+ Dhcp6Client client;
+
+ uint32_t na_iaid = 2222;
+ client.requestAddress(na_iaid);
+
+ uint32_t pd_iaid = 3333;
+ client.requestPrefix(pd_iaid);
+
+ uint32_t exp_leases = 2;
+
+ // Configure client to request IA_NA.
+ // Make 4-way exchange to get the lease.
+ ASSERT_NO_FATAL_FAILURE(genRequest(TEE_CONFIGS[0], client, exp_leases));
+
+ // Make sure the timers are right for both IAs
+ uint32_t actual_t1;
+ uint32_t actual_t2;
+
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1000, actual_t1);
+ EXPECT_EQ(2000, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1000, actual_t1);
+ EXPECT_EQ(2000, actual_t2);
+
+ // Let's renew the leases.
+ ASSERT_NO_THROW(client.doRenew());
+
+ // Now check the timers again.
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1000, actual_t1);
+ EXPECT_EQ(2000, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1000, actual_t1);
+ EXPECT_EQ(2000, actual_t2);
+}
+
+// This test verifies that T1 and T2 are calculated by
+// default when explicit values for renew-timer
+// and rebind-timer are not present.
+TEST_F(TeeTest, defaultTimers) {
+ Dhcp6Client client;
+
+ uint32_t na_iaid = 2222;
+ client.requestAddress(na_iaid);
+
+ uint32_t pd_iaid = 3333;
+ client.requestPrefix(pd_iaid);
+
+ uint32_t exp_leases = 2;
+
+ // Configure client to request IA_NA.
+ // Make 4-way exchange to get the lease.
+ ASSERT_NO_FATAL_FAILURE(genRequest(TEE_CONFIGS[1], client, exp_leases));
+
+ // Make sure the timers are right for both IAs
+ uint32_t actual_t1;
+ uint32_t actual_t2;
+
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1500, actual_t1);
+ EXPECT_EQ(2400, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1500, actual_t1);
+ EXPECT_EQ(2400, actual_t2);
+
+ // Let's renew the leases.
+ ASSERT_NO_THROW(client.doRenew());
+
+ // Now check the timers again.
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1500, actual_t1);
+ EXPECT_EQ(2400, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1500, actual_t1);
+ EXPECT_EQ(2400, actual_t2);
+}
+
+// This test verifies that custom percentages for T1 and T2
+// can be used for calculation.
+TEST_F(TeeTest, calculateTimers) {
+ Dhcp6Client client;
+
+ uint32_t na_iaid = 2222;
+ client.requestAddress(na_iaid);
+
+ uint32_t pd_iaid = 3333;
+ client.requestPrefix(pd_iaid);
+
+ uint32_t exp_leases = 2;
+
+ // Configure client to request IA_NA.
+ // Make 4-way exchange to get the lease.
+ ASSERT_NO_FATAL_FAILURE(genRequest(TEE_CONFIGS[2], client, exp_leases));
+
+ // Make sure the timers are right for both IAs
+ uint32_t actual_t1;
+ uint32_t actual_t2;
+
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1350, actual_t1);
+ EXPECT_EQ(2100, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1350, actual_t1);
+ EXPECT_EQ(2100, actual_t2);
+
+ // Let's renew the leases.
+ ASSERT_NO_THROW(client.doRenew());
+
+ // Now check the timers again.
+ ASSERT_TRUE(client.getTeeTimes(na_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1350, actual_t1);
+ EXPECT_EQ(2100, actual_t2);
+
+ ASSERT_TRUE(client.getTeeTimes(pd_iaid, actual_t1, actual_t2));
+ EXPECT_EQ(1350, actual_t1);
+ EXPECT_EQ(2100, actual_t2);
+}
+
+
+
+} // end of anonymous namespace
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