added support for PTR RR

git-svn-id: svn://bind10.isc.org/svn/bind10/trunk@1206 e5f2f494-b856-4b98-b285-d166d9295462

src/lib/dns/rdata/generic/ptr_12.cc

@@ -0,0 +1,80 @@
+// Copyright (C) 2010  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.
+
+// $Id$
+
+#include <string>
+
+#include "buffer.h"
+#include "name.h"
+#include "messagerenderer.h"
+#include "rdata.h"
+#include "rdataclass.h"
+
+using namespace std;
+
+// BEGIN_ISC_NAMESPACE
+// BEGIN_RDATA_NAMESPACE
+
+PTR::PTR(const string& type_str) :
+    ptr_name_(type_str)
+{}
+
+PTR::PTR(InputBuffer& buffer, size_t rdata_len) :
+    ptr_name_(buffer)
+{
+    // we don't need rdata_len for parsing.  if necessary, the caller will
+    // check consistency.
+}
+
+PTR::PTR(const PTR& source) :
+    ptr_name_(source.ptr_name_)
+{}
+
+std::string
+PTR::toText() const
+{
+    return (ptr_name_.toText());
+}
+
+void
+PTR::toWire(OutputBuffer& buffer) const
+{
+    ptr_name_.toWire(buffer);
+}
+
+void
+PTR::toWire(MessageRenderer& renderer) const
+{
+    renderer.writeName(ptr_name_);
+}
+
+int
+PTR::compare(const Rdata& other) const
+{
+    // The compare method normally begins with this dynamic cast.
+    const PTR& other_ptr = dynamic_cast<const PTR&>(other);
+
+    return (compareNames(ptr_name_, other_ptr.ptr_name_));
+
+}
+
+const Name&
+PTR::getPTRName() const
+{
+    return (ptr_name_);
+}
+
+// END_RDATA_NAMESPACE
+// END_ISC_NAMESPACE

src/lib/dns/rdata/generic/ptr_12.h

@@ -0,0 +1,56 @@
+// Copyright (C) 2010  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.
+
+// $Id$
+
+// BEGIN_HEADER_GUARD
+
+#include <string>
+
+#include "name.h"
+#include "rdata.h"
+
+// BEGIN_ISC_NAMESPACE
+
+// BEGIN_COMMON_DECLARATIONS
+// END_COMMON_DECLARATIONS
+
+// BEGIN_RDATA_NAMESPACE
+
+class PTR : public Rdata {
+public:
+    // BEGIN_COMMON_MEMBERS
+    // END_COMMON_MEMBERS
+private:
+    // RR-type specific members are here.
+
+    ///
+    /// Specialized constructor
+    ///
+    explicit PTR(const Name& ptr_name) : ptr_name_(ptr_name) {}
+    ///
+    /// Specialized methods
+    ///
+    const Name& getPTRName() const;
+private:
+    Name ptr_name_;
+};
+
+// END_RDATA_NAMESPACE
+// END_ISC_NAMESPACE
+// END_HEADER_GUARD
+
+// Local Variables: 
+// mode: c++
+// End: 

src/lib/dns/tests/Makefile.am

@@ -15,7 +15,7 @@ run_unittests_SOURCES += rdata_unittest.h rdata_unittest.cc
 run_unittests_SOURCES += rdata_in_a_unittest.cc rdata_in_aaaa_unittest.cc
 run_unittests_SOURCES += rdata_ns_unittest.cc rdata_soa_unittest.cc
 run_unittests_SOURCES += rdata_txt_unittest.cc rdata_mx_unittest.cc
-run_unittests_SOURCES += rdata_cname_unittest.cc
+run_unittests_SOURCES += rdata_ptr_unittest.cc rdata_cname_unittest.cc
 run_unittests_SOURCES += rdata_dname_unittest.cc
 run_unittests_SOURCES += rdata_opt_unittest.cc
 run_unittests_SOURCES += rdata_dnskey_unittest.cc

src/lib/dns/tests/rdata_ptr_unittest.cc

@@ -0,0 +1,132 @@
+// Copyright (C) 2010  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.
+
+// $Id$
+
+#include <dns/buffer.h>
+#include <dns/messagerenderer.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+#include <dns/rrclass.h>
+#include <dns/rrtype.h>
+
+#include <gtest/gtest.h>
+
+#include "unittest_util.h"
+#include "rdata_unittest.h"
+
+using isc::UnitTestUtil;
+using namespace std;
+using namespace isc::dns;
+using namespace isc::dns::rdata;
+
+//
+// This test currently simply copies the NS RDATA tests.
+//
+
+namespace {
+class Rdata_PTR_Test : public RdataTest {
+    // there's nothing to specialize
+};
+
+const generic::PTR rdata_ptr("ns.example.com");
+const generic::PTR rdata_ptr2("ns2.example.com");
+const uint8_t wiredata_ptr[] = {
+    0x02, 0x6e, 0x73, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x03,
+    0x63, 0x6f, 0x6d, 0x00 };
+const uint8_t wiredata_ptr2[] = {
+    // first name: ns.example.com.
+    0x02, 0x6e, 0x73, 0x07, 0x65, 0x78, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x03,
+    0x63, 0x6f, 0x6d, 0x00,
+    // second name: ns2.example.com.  all labels except the first should be
+    // compressed.
+    0x03, 0x6e, 0x73, 0x32, 0xc0, 0x03 };
+
+TEST_F(Rdata_PTR_Test, createFromText)
+{
+    EXPECT_EQ(0, rdata_ptr.compare(generic::PTR("ns.example.com")));
+    // explicitly add a trailing dot.  should be the same RDATA.
+    EXPECT_EQ(0, rdata_ptr.compare(generic::PTR("ns.example.com.")));
+    // should be case sensitive.
+    EXPECT_EQ(0, rdata_ptr.compare(generic::PTR("NS.EXAMPLE.COM")));
+    // RDATA of a class-independent type should be recognized for any
+    // "unknown" class.
+    EXPECT_EQ(0, rdata_ptr.compare(*createRdata(RRType("PTR"), RRClass(65000),
+                                               "ns.example.com")));
+}
+
+TEST_F(Rdata_PTR_Test, createFromWire)
+{
+    EXPECT_EQ(0, rdata_ptr.compare(
+                  *rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                        "testdata/rdata_ns_fromWire")));
+    // RDLENGTH is too short
+    EXPECT_THROW(rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                      "testdata/rdata_ns_fromWire", 18),
+                 InvalidRdataLength);
+    // RDLENGTH is too long
+    EXPECT_THROW(rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                      "testdata/rdata_ns_fromWire", 36),
+                 InvalidRdataLength);
+    // incomplete name.  the error should be detected in the name constructor
+    EXPECT_THROW(rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                      "testdata/rdata_ns_fromWire", 71),
+                 IncompleteName);
+
+    EXPECT_EQ(0, generic::PTR("ns2.example.com").compare(
+                  *rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                        "testdata/rdata_ns_fromWire", 55)));
+    EXPECT_THROW(*rdataFactoryFromFile(RRType("PTR"), RRClass("IN"),
+                                       "testdata/rdata_ns_fromWire", 63),
+                 InvalidRdataLength);
+}
+
+TEST_F(Rdata_PTR_Test, toWireBuffer)
+{
+    rdata_ptr.toWire(obuffer);
+    EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData,
+                        obuffer.getData(), obuffer.getLength(),
+                        wiredata_ptr, sizeof(wiredata_ptr));
+}
+
+TEST_F(Rdata_PTR_Test, toWireRenderer)
+{
+    rdata_ptr.toWire(renderer);
+    EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData,
+                        obuffer.getData(), obuffer.getLength(),
+                        wiredata_ptr, sizeof(wiredata_ptr));
+    rdata_ptr2.toWire(renderer);
+    EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData,
+                        obuffer.getData(), obuffer.getLength(),
+                        wiredata_ptr2, sizeof(wiredata_ptr2));
+}
+
+TEST_F(Rdata_PTR_Test, toText)
+{
+    EXPECT_EQ("ns.example.com.", rdata_ptr.toText());
+}
+
+TEST_F(Rdata_PTR_Test, compare)
+{
+    generic::PTR small("a.example");
+    generic::PTR large("example");
+    EXPECT_EQ(true, Name("a.example") > Name("example"));
+    EXPECT_GT(0, small.compare(large));
+}
+
+TEST_F(Rdata_PTR_Test, getPTRName)
+{
+    EXPECT_EQ(Name("ns.example.com"), rdata_ptr.getPTRName());
+}
+}