diff options
Diffstat (limited to 'src/lib/dhcp/tests/option6_client_fqdn_unittest.cc')
| -rw-r--r-- | src/lib/dhcp/tests/option6_client_fqdn_unittest.cc | 819 |
1 files changed, 819 insertions, 0 deletions
diff --git a/src/lib/dhcp/tests/option6_client_fqdn_unittest.cc b/src/lib/dhcp/tests/option6_client_fqdn_unittest.cc new file mode 100644 index 0000000..c293489 --- /dev/null +++ b/src/lib/dhcp/tests/option6_client_fqdn_unittest.cc @@ -0,0 +1,819 @@ +// Copyright (C) 2013-2018 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 <dhcp/option6_client_fqdn.h> +#include <dns/name.h> +#include <util/buffer.h> +#include <boost/scoped_ptr.hpp> +#include <gtest/gtest.h> + +namespace { + +using namespace isc; +using namespace isc::dhcp; + +// This test verifies that constructor accepts empty partial domain-name but +// does not accept empty fully qualified domain name. +TEST(Option6ClientFqdnTest, constructEmptyName) { + // Create an instance of the source option. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S, "", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_TRUE(option->getDomainName().empty()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); + + // Constructor should not accept empty fully qualified domain name. + EXPECT_THROW(Option6ClientFqdn(Option6ClientFqdn::FLAG_S, "", + Option6ClientFqdn::FULL), + InvalidOption6FqdnDomainName); + // This check is similar to previous one, but using domain-name comprising + // a single space character. This should be treated as empty domain-name. + EXPECT_THROW(Option6ClientFqdn(Option6ClientFqdn::FLAG_S, " ", + Option6ClientFqdn::FULL), + InvalidOption6FqdnDomainName); + + // Try different constructor. + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_O)) + ); + ASSERT_TRUE(option); + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_TRUE(option->getDomainName().empty()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); +} + +// This test verifies that copy constructor makes a copy of the option and +// the source option instance can be deleted (both instances don't share +// any resources). +TEST(Option6ClientFqdnTest, copyConstruct) { + // Create an instance of the source option. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S, + "myhost.example.com", + Option6ClientFqdn::FULL)) + ); + ASSERT_TRUE(option); + + // Use copy constructor to create a second instance of the option. + boost::scoped_ptr<Option6ClientFqdn> option_copy; + ASSERT_NO_THROW( + option_copy.reset(new Option6ClientFqdn(*option)) + ); + ASSERT_TRUE(option_copy); + + // Copy construction should result in no shared resources between + // two objects. In particular, pointer to implementation should not + // be shared. Thus, we can release the source object now. + option.reset(); + + // Verify that all parameters have been copied to the target object. + EXPECT_TRUE(option_copy->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("myhost.example.com.", option_copy->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::FULL, option_copy->getDomainNameType()); + + // Do another test with different parameters to verify that parameters + // change when copied object is changed. + + // Create an option with different parameters. + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_O, + "example", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + + // Call copy-constructor to copy the option. + ASSERT_NO_THROW( + option_copy.reset(new Option6ClientFqdn(*option)) + ); + ASSERT_TRUE(option_copy); + + option.reset(); + + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_TRUE(option_copy->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("example", option_copy->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option_copy->getDomainNameType()); +} + +// This test verifies that copy constructor makes a copy of the option, when +// domain-name is empty. +TEST(Option6ClientFqdnTest, copyConstructEmptyDomainName) { + // Create an instance of the source option. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S)); + ); + ASSERT_TRUE(option); + + // Use copy constructor to create a second instance of the option. + boost::scoped_ptr<Option6ClientFqdn> option_copy; + ASSERT_NO_THROW( + option_copy.reset(new Option6ClientFqdn(*option)) + ); + ASSERT_TRUE(option_copy); + + // Copy construction should result in no shared resources between + // two objects. In particular, pointer to implementation should not + // be shared. Thus, we can release the source object now. + option.reset(); + + // Verify that all parameters have been copied to the target object. + EXPECT_TRUE(option_copy->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option_copy->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("", option_copy->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option_copy->getDomainNameType()); +} + +// This test verifies that the option in the on-wire format is parsed correctly. +TEST(Option6ClientFqdnTest, constructFromWire) { + const uint8_t in_data[] = { + Option6ClientFqdn::FLAG_S, // flags + 6, 77, 121, 104, 111, 115, 116, // Myhost. + 7, 69, 120, 97, 109, 112, 108, 101, // Example. + 3, 67, 111, 109, 0 // Com. + }; + size_t in_data_size = sizeof(in_data) / sizeof(in_data[0]); + OptionBuffer in_buf(in_data, in_data + in_data_size); + + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(in_buf.begin(), in_buf.end())) + ); + ASSERT_TRUE(option); + + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("myhost.example.com.", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); +} + +// Verify that exception is thrown if the domain-name label is +// longer than 63. +TEST(Option6ClientFqdnTest, constructFromWireTooLongLabel) { + OptionBuffer in_buf(Option6ClientFqdn::FLAG_S); + in_buf.push_back(70); + in_buf.insert(in_buf.end(), 70, 109); + in_buf.push_back(0); + + EXPECT_THROW(Option6ClientFqdn(in_buf.begin(), in_buf.end()), + InvalidOption6FqdnDomainName); +} + +// Verify that exception is thrown if the overall length of the domain-name +// is over 255. +TEST(Option6ClientFqdnTest, constructFromWireTooLongDomainName) { + OptionBuffer in_buf(Option6ClientFqdn::FLAG_S); + // Construct the FQDN from 26 labels, each having a size of 10. + for (int i = 0; i < 26; ++i) { + // Append the length of each label. + in_buf.push_back(10); + // Append the actual label. + in_buf.insert(in_buf.end(), 10, 109); + } + // Terminate FQDN with a dot. + in_buf.push_back(0); + + EXPECT_THROW(Option6ClientFqdn(in_buf.begin(), in_buf.end()), + InvalidOption6FqdnDomainName); +} + +// This test verifies that truncated option is rejected. +TEST(Option6ClientFqdnTest, constructFromWireTruncated) { + // Empty buffer is invalid. It should be at least one octet long. + OptionBuffer in_buf; + ASSERT_THROW(Option6ClientFqdn(in_buf.begin(), in_buf.end()), + OutOfRange); +} + +// This test verifies that the option in the on-wire format with partial +// domain-name is parsed correctly. +TEST(Option6ClientFqdnTest, constructFromWirePartial) { + const uint8_t in_data[] = { + Option6ClientFqdn::FLAG_N, // flags + 6, 77, 121, 104, 111, 115, 116 // Myhost + }; + size_t in_data_size = sizeof(in_data) / sizeof(in_data[0]); + OptionBuffer in_buf(in_data, in_data + in_data_size); + + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(in_buf.begin(), in_buf.end())) + ); + ASSERT_TRUE(option); + + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("myhost", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); +} + +// This test verifies that the option in the on-wire format with empty +// domain-name is parsed correctly. +TEST(Option6ClientFqdnTest, constructFromWireEmpty) { + OptionBuffer in_buf(Option6ClientFqdn::FLAG_S); + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(in_buf.begin(), in_buf.end())) + ); + ASSERT_TRUE(option); + + // domain-name field should be empty because on-wire data comprised + // flags field only. + EXPECT_TRUE(option->getDomainName().empty()); +} + +// This test verifies that assignment operator can be used to assign one +// instance of the option to another. +TEST(Option6ClientFqdnTest, assignment) { + // Usually the smart pointer is used to declare options and call + // constructor within assert. Thanks to this approach, the option instance + // is in the function scope and only initialization is done within assert. + // In this particular test we can't use smart pointers because we are + // testing assignment operator like this: + // + // option2 = option; + // + // The two asserts below do not create the instances that we will used to + // test assignment. They just attempt to create instances of the options + // with the same parameters as those that will be created for the actual + // assignment test. If these asserts do not fail, we can create options + // for the assignment test, do not surround them with asserts and be sure + // they will not throw. + ASSERT_NO_THROW(Option6ClientFqdn(Option6ClientFqdn::FLAG_S, + "myhost.example.com", + Option6ClientFqdn::FULL)); + + ASSERT_NO_THROW(Option6ClientFqdn(Option6ClientFqdn::FLAG_N, + "myhost", + Option6ClientFqdn::PARTIAL)); + + // Create options with the same parameters as tested above. + + // Create first option. + Option6ClientFqdn option(Option6ClientFqdn::FLAG_S, + "Myhost.Example.Com", + Option6ClientFqdn::FULL); + + // Verify that the values have been set correctly. + ASSERT_TRUE(option.getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_FALSE(option.getFlag(Option6ClientFqdn::FLAG_O)); + ASSERT_FALSE(option.getFlag(Option6ClientFqdn::FLAG_N)); + ASSERT_EQ("myhost.example.com.", option.getDomainName()); + ASSERT_EQ(Option6ClientFqdn::FULL, option.getDomainNameType()); + + // Create a second option. + Option6ClientFqdn option2(Option6ClientFqdn::FLAG_N, + "myhost", + Option6ClientFqdn::PARTIAL); + + // Verify tha the values have been set correctly. + ASSERT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_O)); + ASSERT_TRUE(option2.getFlag(Option6ClientFqdn::FLAG_N)); + ASSERT_EQ("myhost", option2.getDomainName()); + ASSERT_EQ(Option6ClientFqdn::PARTIAL, option2.getDomainNameType()); + + + // Make the assignment. + ASSERT_NO_THROW(option2 = option); + + // Both options should now have the same values. + EXPECT_TRUE(option2.getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ(option.getDomainName(), option2.getDomainName()); + EXPECT_EQ(option.getDomainNameType(), option2.getDomainNameType()); +} + +// This test verifies that assignment operator can be used to assign one +// instance of the option to another, when the domain-name is empty. +TEST(Option6ClientFqdnTest, assignmentEmptyDomainName) { + ASSERT_NO_THROW( + Option6ClientFqdn(static_cast<uint8_t>(Option6ClientFqdn::FLAG_S)) + ); + + ASSERT_NO_THROW(Option6ClientFqdn(Option6ClientFqdn::FLAG_N, + "myhost", + Option6ClientFqdn::PARTIAL)); + + // Create options with the same parameters as tested above. + + // Create first option. + Option6ClientFqdn option(Option6ClientFqdn::FLAG_S); + + // Verify that the values have been set correctly. + ASSERT_TRUE(option.getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_FALSE(option.getFlag(Option6ClientFqdn::FLAG_O)); + ASSERT_FALSE(option.getFlag(Option6ClientFqdn::FLAG_N)); + ASSERT_EQ("", option.getDomainName()); + ASSERT_EQ(Option6ClientFqdn::PARTIAL, option.getDomainNameType()); + + // Create a second option. + Option6ClientFqdn option2(Option6ClientFqdn::FLAG_N, + "myhost", + Option6ClientFqdn::PARTIAL); + + // Verify that the values have been set correctly. + ASSERT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_O)); + ASSERT_TRUE(option2.getFlag(Option6ClientFqdn::FLAG_N)); + ASSERT_EQ("myhost", option2.getDomainName()); + ASSERT_EQ(Option6ClientFqdn::PARTIAL, option2.getDomainNameType()); + + + // Make the assignment. + ASSERT_NO_THROW(option2 = option); + + // Both options should now have the same values. + EXPECT_TRUE(option2.getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option2.getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_EQ("", option2.getDomainName()); + EXPECT_EQ(option.getDomainNameType(), option2.getDomainNameType()); +} + + +// This test verifies that constructor will throw an exception if invalid +// DHCPv6 Client FQDN Option flags are specified. +TEST(Option6ClientFqdnTest, constructInvalidFlags) { + // First, check that constructor does not throw an exception when + // valid flags values are provided. That way we eliminate the issue + // that constructor always throws exception. + uint8_t flags = 0; + ASSERT_NO_THROW(Option6ClientFqdn(flags, "myhost.example.com")); + + // Invalid flags: The maximal value is 0x7 when all flag bits are set + // (00000111b). The flag value of 0x14 sets the bit from the Must Be + // Zero (MBZ) bitset (00001100b). + flags = 0x14; + EXPECT_THROW(Option6ClientFqdn(flags, "myhost.example.com"), + InvalidOption6FqdnFlags); + + // According to RFC 4704, section 4.1. if the N bit is set the S bit MUST + // be zero. If both are set, constructor is expected to throw. + flags = Option6ClientFqdn::FLAG_N | Option6ClientFqdn::FLAG_S; + EXPECT_THROW(Option6ClientFqdn(flags, "myhost.example.com"), + InvalidOption6FqdnFlags); +} + +// This test verifies that constructor which parses option from on-wire format +// will throw exception if parsed flags field is invalid. +TEST(Option6ClientFqdnTest, constructFromWireInvalidFlags) { + // Create a buffer which holds flags field only. Set valid flag field at + // at first to make sure that constructor doesn't always throw an exception. + OptionBuffer in_buf(Option6ClientFqdn::FLAG_N); + ASSERT_NO_THROW(Option6ClientFqdn(in_buf.begin(), in_buf.end())); + + // Replace the flags with invalid value and verify that constructor throws + // appropriate exception. + in_buf[0] = Option6ClientFqdn::FLAG_N | Option6ClientFqdn::FLAG_S; + EXPECT_THROW(Option6ClientFqdn(in_buf.begin(), in_buf.end()), + InvalidOption6FqdnFlags); +} + +// This test verifies that if invalid domain name is used the constructor +// will throw appropriate exception. +TEST(Option6ClientFqdnTest, constructInvalidName) { + // First, check that constructor does not throw when valid domain name + // is specified. That way we eliminate the possibility that constructor + // always throws exception. + ASSERT_NO_THROW(Option6ClientFqdn(0, "myhost.example.com")); + + // Specify invalid domain name and expect that exception is thrown. + EXPECT_THROW(Option6ClientFqdn(0, "my...host.example.com"), + InvalidOption6FqdnDomainName); +} + +// This test verifies that getFlag throws an exception if flag value other +// than FLAG_N, FLAG_S, FLAG_O is specified. +TEST(Option6ClientFqdnTest, getFlag) { + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "myhost.example.com")) + ); + ASSERT_TRUE(option); + + // The 0x3 (binary 011) specifies two distinct bits in the flags field. + // This value is ambiguous for getFlag function and this function doesn't + // know which flag the caller is attempting to check. + EXPECT_THROW(option->getFlag(0x3), InvalidOption6FqdnFlags); +} + +// This test verifies that flags can be modified and that incorrect flags +// are rejected. +TEST(Option6ClientFqdnTest, setFlag) { + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "myhost.example.com")) + ); + ASSERT_TRUE(option); + + // All flags should be set to 0 initially. + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + + // Set N = 1 + ASSERT_NO_THROW(option->setFlag(Option6ClientFqdn::FLAG_N, true)); + ASSERT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_N)); + + // Set O = 1 + ASSERT_NO_THROW(option->setFlag(Option6ClientFqdn::FLAG_O, true)); + ASSERT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_O)); + + // Set S = 1, this should throw exception because S and N must not + // be set in the same time. + ASSERT_THROW(option->setFlag(Option6ClientFqdn::FLAG_S, true), + InvalidOption6FqdnFlags); + + // Set N = 0 + ASSERT_NO_THROW(option->setFlag(Option6ClientFqdn::FLAG_N, false)); + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + + // Set S = 1, this should not result in exception because N has been + // cleared. + ASSERT_NO_THROW(option->setFlag(Option6ClientFqdn::FLAG_S, true)); + ASSERT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + + // Set N = 1, this should result in exception because S = 1 + ASSERT_THROW(option->setFlag(Option6ClientFqdn::FLAG_N, true), + InvalidOption6FqdnFlags); + + // Set O = 0 + ASSERT_NO_THROW(option->setFlag(Option6ClientFqdn::FLAG_O, false)); + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + + // Try out of bounds settings. + uint8_t flags = 0; + ASSERT_THROW(option->setFlag(flags, true), InvalidOption6FqdnFlags); + + flags = 0x14; + ASSERT_THROW(option->setFlag(flags, true), InvalidOption6FqdnFlags); +} + +// This test verifies that flags field of the option is set to 0 when resetFlags +// function is called. +TEST(Option6ClientFqdnTest, resetFlags) { + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S | + Option6ClientFqdn::FLAG_O, + "myhost.example.com", + Option6ClientFqdn::FULL)) + ); + ASSERT_TRUE(option); + + // Check that flags we set in the constructor are set. + ASSERT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + ASSERT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_O)); + ASSERT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + + option->resetFlags(); + + // After reset, all flags should be 0. + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); +} + +// This test verifies that current domain-name can be replaced with a new +// domain-name. +TEST(Option6ClientFqdnTest, setDomainName) { + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S, + "myhost.example.com", + Option6ClientFqdn::FULL)) + ); + ASSERT_TRUE(option); + ASSERT_EQ("myhost.example.com.", option->getDomainName()); + ASSERT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); + + // Partial domain-name. + ASSERT_NO_THROW(option->setDomainName("Myhost", + Option6ClientFqdn::PARTIAL)); + EXPECT_EQ("myhost", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); + + // Fully qualified domain-name. + ASSERT_NO_THROW(option->setDomainName("Example.com", + Option6ClientFqdn::FULL)); + EXPECT_EQ("example.com.", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); + + // Empty domain name (partial). This should be successful. + ASSERT_NO_THROW(option->setDomainName("", Option6ClientFqdn::PARTIAL)); + EXPECT_TRUE(option->getDomainName().empty()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); + + // Fully qualified domain-names must not be empty. + EXPECT_THROW(option->setDomainName("", Option6ClientFqdn::FULL), + InvalidOption6FqdnDomainName); + EXPECT_THROW(option->setDomainName(" ", Option6ClientFqdn::FULL), + InvalidOption6FqdnDomainName); +} + +// This test verifies that current domain-name can be reset to empty one. +TEST(Option6ClientFqdnTest, resetDomainName) { + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_S, + "myhost.example.com", + Option6ClientFqdn::FULL)) + ); + ASSERT_TRUE(option); + ASSERT_EQ("myhost.example.com.", option->getDomainName()); + ASSERT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); + + // Set the domain-name to empty one. + ASSERT_NO_THROW(option->resetDomainName()); + EXPECT_TRUE(option->getDomainName().empty()); +} + +// This test verifies on-wire format of the option is correctly created. +TEST(Option6ClientFqdnTest, pack) { + // Create option instance. Check that constructor doesn't throw. + const uint8_t flags = Option6ClientFqdn::FLAG_S; + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(flags, "myhost.example.com")) + ); + ASSERT_TRUE(option); + + // Prepare on-wire format of the option. + isc::util::OutputBuffer buf(10); + ASSERT_NO_THROW(option->pack(buf)); + + // Prepare reference data. + const uint8_t ref_data[] = { + 0, 39, 0, 21, // header + Option6ClientFqdn::FLAG_S, // flags + 6, 109, 121, 104, 111, 115, 116, // myhost. + 7, 101, 120, 97, 109, 112, 108, 101, // example. + 3, 99, 111, 109, 0 // com. + }; + size_t ref_data_size = sizeof(ref_data) / sizeof(ref_data[0]); + + // Check if the buffer has the same length as the reference data, + // so as they can be compared directly. + ASSERT_EQ(ref_data_size, buf.getLength()); + EXPECT_EQ(0, memcmp(ref_data, buf.getData(), buf.getLength())); +} + +// This test verifies on-wire format of the option with partial domain name +// is correctly created. +TEST(Option6ClientFqdnTest, packPartial) { + // Create option instance. Check that constructor doesn't throw. + const uint8_t flags = Option6ClientFqdn::FLAG_S; + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(flags, "myhost", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + + // Prepare on-wire format of the option. + isc::util::OutputBuffer buf(10); + ASSERT_NO_THROW(option->pack(buf)); + + // Prepare reference data. + const uint8_t ref_data[] = { + 0, 39, 0, 8, // header + Option6ClientFqdn::FLAG_S, // flags + 6, 109, 121, 104, 111, 115, 116 // myhost + }; + size_t ref_data_size = sizeof(ref_data) / sizeof(ref_data[0]); + + // Check if the buffer has the same length as the reference data, + // so as they can be compared directly. + ASSERT_EQ(ref_data_size, buf.getLength()); + EXPECT_EQ(0, memcmp(ref_data, buf.getData(), buf.getLength())); +} + +// This test verifies that it is possible to encode the option which carries +// empty domain-name in the wire format. +TEST(Option6ClientFqdnTest, packEmpty) { + // Create option instance. Check that constructor doesn't throw. + const uint8_t flags = Option6ClientFqdn::FLAG_S; + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(flags)) + ); + ASSERT_TRUE(option); + + // Prepare on-wire format of the option. + isc::util::OutputBuffer buf(5); + ASSERT_NO_THROW(option->pack(buf)); + + // Prepare reference data. + const uint8_t ref_data[] = { + 0, 39, 0, 1, // header + Option6ClientFqdn::FLAG_S // flags + }; + size_t ref_data_size = sizeof(ref_data) / sizeof(ref_data[0]); + + // Check if the buffer has the same length as the reference data, + // so as they can be compared directly. + ASSERT_EQ(ref_data_size, buf.getLength()); + EXPECT_EQ(0, memcmp(ref_data, buf.getData(), buf.getLength())); +} + +// This test verifies that on-wire option data holding fully qualified domain +// name is parsed correctly. +TEST(Option6ClientFqdnTest, unpack) { + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_O, + "myhost", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + // Make sure that the parameters have been set correctly. Later in this + // test we will check that they will be replaced with new values when + // unpack is called. + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_EQ("myhost", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); + + const uint8_t in_data[] = { + Option6ClientFqdn::FLAG_S, // flags + 6, 77, 121, 104, 111, 115, 116, // Myhost. + 7, 69, 120, 97, 109, 112, 108, 101, // Example. + 3, 99, 111, 109, 0 // com. + }; + size_t in_data_size = sizeof(in_data) / sizeof(in_data[0]); + OptionBuffer in_buf(in_data, in_data + in_data_size); + + // Initialize new values from the on-wire format. + ASSERT_NO_THROW(option->unpack(in_buf.begin(), in_buf.end())); + + // Check that new values are correct. + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_EQ("myhost.example.com.", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); +} + +// This test verifies that on-wire option data holding partial domain name +// is parsed correctly. +TEST(Option6ClientFqdnTest, unpackPartial) { + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_O, + "myhost.example.com")) + ); + ASSERT_TRUE(option); + // Make sure that the parameters have been set correctly. Later in this + // test we will check that they will be replaced with new values when + // unpack is called. + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_EQ("myhost.example.com.", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::FULL, option->getDomainNameType()); + + const uint8_t in_data[] = { + Option6ClientFqdn::FLAG_S, // flags + 6, 77, 121, 104, 111, 115, 116 // Myhost + }; + size_t in_data_size = sizeof(in_data) / sizeof(in_data[0]); + OptionBuffer in_buf(in_data, in_data + in_data_size); + + // Initialize new values from the on-wire format. + ASSERT_NO_THROW(option->unpack(in_buf.begin(), in_buf.end())); + + // Check that new values are correct. + EXPECT_TRUE(option->getFlag(Option6ClientFqdn::FLAG_S)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_N)); + EXPECT_FALSE(option->getFlag(Option6ClientFqdn::FLAG_O)); + EXPECT_EQ("myhost", option->getDomainName()); + EXPECT_EQ(Option6ClientFqdn::PARTIAL, option->getDomainNameType()); +} + +// This test verifies that the empty buffer is rejected when decoding an option +// from on-wire format. +TEST(Option6ClientFqdnTest, unpackTruncated) { + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(Option6ClientFqdn::FLAG_O)) + ); + ASSERT_TRUE(option); + + // Empty buffer is invalid. It should be at least 1 octet long. + OptionBuffer in_buf; + EXPECT_THROW(option->unpack(in_buf.begin(), in_buf.end()), OutOfRange); +} + +// This test verifies that string representation of the option returned by +// toText method is correctly formatted. +TEST(Option6ClientFqdnTest, toText) { + // Create option instance. Check that constructor doesn't throw. + uint8_t flags = Option6ClientFqdn::FLAG_N | Option6ClientFqdn::FLAG_O; + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(flags, + "myhost.example.com")) + ); + ASSERT_TRUE(option); + + // The base indentation of the option will be set to 2. It should appear + // as follows. + std::string ref_string = + " type=39(CLIENT_FQDN), flags: (N=1, O=1, S=0), " + "domain-name='myhost.example.com.' (full)"; + const int indent = 2; + EXPECT_EQ(ref_string, option->toText(indent)); + + // Create another option with different parameters: + // - flags set to 0 + // - domain-name is now partial, not fully qualified + // Also, remove base indentation. + flags = 0; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(flags, "myhost", + Option6ClientFqdn::PARTIAL)) + ); + ref_string = + "type=39(CLIENT_FQDN), flags: (N=0, O=0, S=0), " + "domain-name='myhost' (partial)"; + EXPECT_EQ(ref_string, option->toText()); +} + +// This test verifies that the correct length of the option in on-wire +// format is returned. +TEST(Option6ClientFqdnTest, len) { + // Create option instance. Check that constructor doesn't throw. + boost::scoped_ptr<Option6ClientFqdn> option; + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "myhost.example.com")) + ); + ASSERT_TRUE(option); + // This option comprises a header (4 octets), flag field (1 octet), + // and wire representation of the domain name (length equal to the + // length of the string representation of the domain name + 1). + EXPECT_EQ(25, option->len()); + + // Use different domain name to check if the length also changes + // as expected. + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "example.com")) + ); + ASSERT_TRUE(option); + EXPECT_EQ(18, option->len()); + + // Let's check that the size will change when domain name of a different + // size is used. + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "example.com")) + ); + ASSERT_TRUE(option); + EXPECT_EQ(18, option->len()); + + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "myhost", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + EXPECT_EQ(12, option->len()); + + // Another test for partial domain name but this time using + // two labels. + ASSERT_NO_THROW( + option.reset(new Option6ClientFqdn(0, "myhost.example", + Option6ClientFqdn::PARTIAL)) + ); + ASSERT_TRUE(option); + EXPECT_EQ(20, option->len()); + +} + +} // anonymous namespace |