1 files changed, 160 insertions, 0 deletions
diff --git a/src/lib/dns/rdata/generic/mx_15.cc b/src/lib/dns/rdata/generic/mx_15.cc
new file mode 100644
index 0000000..bbe8abc
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+++ b/src/lib/dns/rdata/generic/mx_15.cc
@@ -0,0 +1,160 @@
+// Copyright (C) 2010-2015 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 <string>
+
+#include <boost/lexical_cast.hpp>
+
+#include <exceptions/exceptions.h>
+
+#include <util/buffer.h>
+#include <dns/name.h>
+#include <dns/messagerenderer.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+
+#include <dns/rdata/generic/detail/lexer_util.h>
+
+using namespace std;
+using boost::lexical_cast;
+using namespace isc::util;
+using isc::dns::rdata::generic::detail::createNameFromLexer;
+
+// BEGIN_ISC_NAMESPACE
+// BEGIN_RDATA_NAMESPACE
+
+MX::MX(InputBuffer& buffer, size_t) :
+    preference_(buffer.readUint16()), mxname_(buffer)
+{
+    // we don't need rdata_len for parsing.  if necessary, the caller will
+    // check consistency.
+}
+
+/// \brief Constructor from string.
+///
+/// The given string must represent a valid MX RDATA.  There can be extra
+/// space characters at the beginning or end of the text (which are simply
+/// ignored), but other extra text, including a new line, will make the
+/// construction fail with an exception.
+///
+/// The EXCHANGE name must be absolute since there's no parameter that
+/// specifies the origin name; if it is not absolute, \c MissingNameOrigin
+/// exception will be thrown. It must not be represented as a quoted
+/// string.
+///
+/// See the construction that takes \c MasterLexer for other fields.
+///
+/// \throw Others Exception from the Name and RRTTL constructors.
+/// \throw InvalidRdataText Other general syntax errors.
+MX::MX(const std::string& mx_str) :
+    // Fill in dummy name and replace them soon below.
+    preference_(0), mxname_(Name::ROOT_NAME())
+{
+    try {
+        std::istringstream ss(mx_str);
+        MasterLexer lexer;
+        lexer.pushSource(ss);
+
+        constructFromLexer(lexer, NULL);
+
+        if (lexer.getNextToken().getType() != MasterToken::END_OF_FILE) {
+            isc_throw(InvalidRdataText, "extra input text for MX: "
+                      << mx_str);
+        }
+    } catch (const MasterLexer::LexerError& ex) {
+        isc_throw(InvalidRdataText, "Failed to construct MX from '" <<
+                  mx_str << "': " << ex.what());
+    }
+}
+
+/// \brief Constructor with a context of MasterLexer.
+///
+/// The \c lexer should point to the beginning of valid textual representation
+/// of an MX RDATA.  The EXCHANGE field can be non-absolute if \c origin
+/// is non-NULL, in which case \c origin is used to make it absolute.
+/// It must not be represented as a quoted string.
+///
+/// The PREFERENCE field must be a valid decimal representation of an
+/// unsigned 16-bit integer.
+///
+/// \throw MasterLexer::LexerError General parsing error such as missing field.
+/// \throw Other Exceptions from the Name and RRTTL constructors if
+/// construction of textual fields as these objects fail.
+///
+/// \param lexer A \c MasterLexer object parsing a master file for the
+/// RDATA to be created
+/// \param origin If non NULL, specifies the origin of EXCHANGE when it
+/// is non-absolute.
+MX::MX(MasterLexer& lexer, const Name* origin,
+       MasterLoader::Options, MasterLoaderCallbacks&) :
+    preference_(0), mxname_(Name::ROOT_NAME())
+{
+    constructFromLexer(lexer, origin);
+}
+
+void
+MX::constructFromLexer(MasterLexer& lexer, const Name* origin) {
+    const uint32_t num = lexer.getNextToken(MasterToken::NUMBER).getNumber();
+    if (num > 65535) {
+        isc_throw(InvalidRdataText, "Invalid MX preference: " << num);
+    }
+    preference_ = static_cast<uint16_t>(num);
+
+    mxname_ = createNameFromLexer(lexer, origin);
+}
+
+MX::MX(uint16_t preference, const Name& mxname) :
+    preference_(preference), mxname_(mxname)
+{}
+
+MX::MX(const MX& other) :
+    Rdata(), preference_(other.preference_), mxname_(other.mxname_)
+{}
+
+void
+MX::toWire(OutputBuffer& buffer) const {
+    buffer.writeUint16(preference_);
+    mxname_.toWire(buffer);
+}
+
+void
+MX::toWire(AbstractMessageRenderer& renderer) const {
+    renderer.writeUint16(preference_);
+    renderer.writeName(mxname_);
+}
+
+string
+MX::toText() const {
+    return (lexical_cast<string>(preference_) + " " + mxname_.toText());
+}
+
+int
+MX::compare(const Rdata& other) const {
+    const MX& other_mx = dynamic_cast<const MX&>(other);
+
+    if (preference_ < other_mx.preference_) {
+        return (-1);
+    } else if (preference_ > other_mx.preference_) {
+        return (1);
+    }
+
+    return (compareNames(mxname_, other_mx.mxname_));
+}
+
+const Name&
+MX::getMXName() const {
+    return (mxname_);
+}
+
+uint16_t
+MX::getMXPref() const {
+    return (preference_);
+}
+
+// END_RDATA_NAMESPACE
+// END_ISC_NAMESPACE