[4097a] Added Dhcpv6SrvTest.subnetGlobalPriority

src/bin/dhcp6/tests/dhcp6_srv_unittest.cc

@@ -2003,6 +2003,72 @@ TEST_F(Dhcpv6SrvTest, subnetClassPriority) {
     EXPECT_EQ(0, opt->getUint8());
 }
 
+// Checks subnet options have the priority over global options
+TEST_F(Dhcpv6SrvTest, subnetGlobalPriority) {
+    IfaceMgrTestConfig test_config(true);
+
+    NakedDhcpv6Srv srv(0);
+
+    // Subnet sets an ipv6-forwarding option in the response.
+    // The router class matches incoming packets with foo in a host-name
+    // option (code 1234) and sets an ipv6-forwarding option in the response.
+    string config = "{ \"interfaces-config\": {"
+        "    \"interfaces\": [ \"*\" ] }, "
+        "\"preferred-lifetime\": 3000,"
+        "\"rebind-timer\": 2000, "
+        "\"renew-timer\": 1000, "
+        "\"valid-lifetime\": 4000, "
+        "\"option-def\": [ "
+        "{   \"name\": \"host-name\","
+        "    \"code\": 1234,"
+        "    \"type\": \"string\" },"
+        "{   \"name\": \"ipv6-forwarding\","
+        "    \"code\": 2345,"
+        "    \"type\": \"boolean\" }],"
+        "\"option-data\": ["
+        "    {    \"name\": \"ipv6-forwarding\", "
+        "         \"data\": \"false\" } ], "
+        "\"subnet6\": [ "
+        "{   \"pools\": [ { \"pool\": \"2001:db8:1::/64\" } ], "
+        "    \"subnet\": \"2001:db8:1::/48\", "
+        "    \"interface\": \"eth1\", "
+        "    \"option-data\": ["
+        "        {    \"name\": \"ipv6-forwarding\", "
+        "             \"data\": \"false\" } ] } ] }";
+    ASSERT_NO_THROW(configure(config));
+
+    // Create a packet with enough to select the subnet and go through
+    // the SOLICIT processing
+    Pkt6Ptr query(new Pkt6(DHCPV6_SOLICIT, 1234));
+    query->setRemoteAddr(IOAddress("fe80::abcd"));
+    OptionPtr clientid = generateClientId();
+    query->addOption(clientid);
+    query->setIface("eth1");
+    query->addOption(generateIA(D6O_IA_NA, 123, 1500, 3000));
+
+    // Create and add an ORO option to the query
+    OptionUint16ArrayPtr oro(new OptionUint16Array(Option::V6, D6O_ORO));
+    ASSERT_TRUE(oro);
+    oro->addValue(2345);
+    query->addOption(oro);
+
+    // Create and add a host-name option to the query
+    OptionStringPtr hostname(new OptionString(Option::V6, 1234, "foo"));
+    ASSERT_TRUE(hostname);
+    query->addOption(hostname);
+
+    // Process the query
+    Pkt6Ptr response = srv.processSolicit(query);
+
+    // Processing should add an ip-forwarding option
+    OptionPtr opt = response->getOption(2345);
+    ASSERT_TRUE(opt);
+    ASSERT_GT(opt->len(), opt->getHeaderLen());
+    // Global sets the value to true/1, subnet to false/0
+    // Here subnet has the priority
+    EXPECT_EQ(0, opt->getUint8());
+}
+
 // Checks class options have the priority over global options
 TEST_F(Dhcpv6SrvTest, classGlobalPriority) {
     IfaceMgrTestConfig test_config(true);