namespace dhcp {
namespace test {
-
/// @brief DHCPv6 client used for unit testing.
///
/// This class implements a DHCPv6 "client" which interoperates with the
/// Currently it simply contains the collection of leases acquired.
struct Configuration {
std::vector<LeaseInfo> leases_;
+
+ /// @brief Clears configuration.
+ void clear() {
+ leases_.clear();
+ }
};
/// @brief Holds the DHCPv6 messages taking part in transaction between
/// @todo Perform sanity checks on returned messages.
void doRequest();
+ /// @brief Removes the stateful configuration obtained from the server.
+ ///
+ /// It removes all leases held by the client.
+ void clearConfig() {
+ config_.clear();
+ }
+
/// @brief Simulates aging of leases by the specified number of seconds.
///
/// This function moves back the time of acquired leases by the specified
dest_addr_ = dest_addr;
}
+ /// @brief Sets a prefix hint to be sent to a server.
+ ///
+ /// @param pref_lft Preferred lifetime.
+ /// @param valid_lft Valid lifetime.
+ /// @param len Prefix length.
+ /// @param prefix Prefix for which the client has a preference.
+ void useHint(const uint32_t pref_lft, const uint32_t valid_lft,
+ const uint8_t len, const std::string& prefix);
+
/// @brief Place IA_NA options to request address assignment.
///
/// This function configures the client to place IA_NA options in its
bool use_na_; ///< Enable address assignment.
bool use_pd_; ///< Enable prefix delegation.
bool use_relay_; ///< Enable relaying messages to the server.
+
+ /// @brief Pointer to the option holding a prefix hint.
+ Option6IAPrefixPtr prefix_hint_;
};
} // end of namespace isc::dhcp::test
--- /dev/null
+// Copyright (C) 2014 Internet Systems Consortium, Inc. ("ISC")
+//
+// Permission to use, copy, modify, and/or distribute this software for any
+// purpose with or without fee is hereby granted, provided that the above
+// copyright notice and this permission notice appear in all copies.
+//
+// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
+// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
+// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
+// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
+// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+// PERFORMANCE OF THIS SOFTWARE.
+
+#include <config.h>
+#include <dhcp/tests/iface_mgr_test_config.h>
+#include <dhcp6/tests/dhcp6_test_utils.h>
+#include <dhcp6/tests/dhcp6_client.h>
+
+using namespace isc;
+using namespace isc::dhcp;
+using namespace isc::dhcp::test;
+using namespace isc::test;
+
+namespace {
+
+/// @brief Set of JSON configurations used by the SARR unit tests.
+///
+/// - Configuration 0:
+/// - one subnet used on eth0 interface
+/// - prefixes of length 64, delegated from the pool: 2001:db8:3::/48
+const char* CONFIGS[] = {
+ // Configuration 0
+ "{ \"interfaces\": [ \"all\" ],"
+ "\"preferred-lifetime\": 3000,"
+ "\"rebind-timer\": 2000, "
+ "\"renew-timer\": 1000, "
+ "\"subnet6\": [ { "
+ " \"pd-pools\": ["
+ " { \"prefix\": \"2001:db8:3::\", "
+ " \"prefix-len\": 48, "
+ " \"delegated-len\": 64"
+ " } ],"
+ " \"subnet\": \"2001:db8::/32\", "
+ " \"interface-id\": \"\","
+ " \"interface\": \"eth0\""
+ " } ],"
+ "\"valid-lifetime\": 4000 }"
+};
+
+/// @brief Test fixture class for testing 4-way exchange: Solicit-Advertise,
+/// Request-Reply.
+class SARRTest : public Dhcpv6SrvTest {
+public:
+ /// @brief Constructor.
+ ///
+ /// Sets up fake interfaces.
+ SARRTest()
+ : Dhcpv6SrvTest(),
+ iface_mgr_test_config_(true) {
+ }
+
+ /// @brief Interface Manager's fake configuration control.
+ IfaceMgrTestConfig iface_mgr_test_config_;
+};
+
+/// Check that server processes correctly a prefix hint sent by the client.
+/// This test checks that the server doesn't allocate colliding prefixes
+/// as a result of receiving hints from two clients which set the
+/// non-significant bytes of the prefix in their hints. The server should zero
+/// the non-significant bytes of the hint and allocate the prefix of the
+/// correct (configured) length.
+TEST_F(SARRTest, directClientPrefixHint) {
+ Dhcp6Client client;
+ // Configure client to request IA_PD.
+ client.usePD();
+ configure(CONFIGS[0], *client.getServer());
+ // Make sure we ended-up having expected number of subnets configured.
+ const Subnet6Collection* subnets = CfgMgr::instance().getSubnets6();
+ ASSERT_EQ(1, subnets->size());
+ // Append IAPREFIX option to the client's message.
+ ASSERT_NO_THROW(client.useHint(100, 200, 56, "2001:db8:3:33::33"));
+ // Perform 4-way exchange.
+ ASSERT_NO_THROW(client.doSARR());
+ // Server should have assigned a prefix.
+ ASSERT_EQ(1, client.getLeaseNum());
+ Lease6 lease_client = client.getLease(0);
+ // The server should correctly deal with the least significant bytes
+ // of the hint being set. It should set them to zero and use the
+ // valid portion of the hint.
+ EXPECT_EQ("2001:db8:3:33::", lease_client.addr_.toText());
+ // Server ignores other parts of the IAPREFIX option.
+ EXPECT_EQ(64, lease_client.prefixlen_);
+ EXPECT_EQ(3000, lease_client.preferred_lft_);
+ EXPECT_EQ(4000, lease_client.valid_lft_);
+ Lease6Ptr lease_server = checkLease(lease_client);
+ // Check that the server recorded the lease.
+ ASSERT_TRUE(lease_server);
+
+ // Remove existing lease and modify the DUID of the client to simulate
+ // the case that different client is trying to get the prefix.
+ client.clearConfig();
+ client.modifyDUID();
+
+ // Use the hint with some least significant bytes set.
+ ASSERT_NO_THROW(client.useHint(100, 200, 56, "2001:db8:3:33::34"));
+ ASSERT_NO_THROW(client.doSARR());
+ // Server should assign a lease.
+ ASSERT_EQ(1, client.getLeaseNum());
+ lease_client = client.getLease(0);
+ // The hint collides with the existing lease, so the server should not
+ // assign for the second client.
+ EXPECT_NE("2001:db8:3:33::", lease_client.addr_.toText());
+ EXPECT_NE("2001:db8:3:33::34", lease_client.addr_.toText());
+ // Check that the assigned prefix belongs to the pool.
+ (*subnets)[0]->inPool(Lease::TYPE_PD, lease_client.addr_);
+ EXPECT_EQ(64, lease_client.prefixlen_);
+ EXPECT_EQ(3000, lease_client.preferred_lft_);
+ EXPECT_EQ(4000, lease_client.valid_lft_);
+ lease_server = checkLease(lease_client);
+ ASSERT_TRUE(lease_server);
+}
+
+} // end of anonymous namespace
projects / thirdparty / kea.git / commitdiff
