1 files changed, 216 insertions, 0 deletions
diff --git a/src/lib/dns/rdata/generic/nsec_47.cc b/src/lib/dns/rdata/generic/nsec_47.cc
new file mode 100644
index 0000000..f8af0e0
--- /dev/null
+++ b/src/lib/dns/rdata/generic/nsec_47.cc
@@ -0,0 +1,216 @@
+// 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 <iostream>
+#include <string>
+#include <sstream>
+#include <vector>
+
+#include <util/encode/base64.h>
+#include <util/buffer.h>
+#include <dns/exceptions.h>
+#include <dns/messagerenderer.h>
+#include <dns/name.h>
+#include <dns/rrtype.h>
+#include <dns/rrttl.h>
+#include <dns/rdata.h>
+#include <dns/rdataclass.h>
+#include <dns/rdata/generic/detail/nsec_bitmap.h>
+#include <dns/rdata/generic/detail/lexer_util.h>
+
+#include <stdio.h>
+#include <time.h>
+
+using namespace std;
+using namespace isc::util;
+using namespace isc::util::encode;
+using namespace isc::dns::rdata::generic::detail::nsec;
+using isc::dns::rdata::generic::detail::createNameFromLexer;
+
+// BEGIN_ISC_NAMESPACE
+// BEGIN_RDATA_NAMESPACE
+
+struct NSECImpl {
+    // straightforward representation of NSEC RDATA fields
+    NSECImpl(const Name& next, vector<uint8_t> typebits) :
+        nextname_(next), typebits_(typebits)
+    {}
+
+    Name nextname_;
+    vector<uint8_t> typebits_;
+};
+
+/// \brief Constructor from string.
+///
+/// The given string must represent a valid NSEC 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 Next Domain Name field must be absolute since there's no
+/// parameter that specifies the origin name; if it is not absolute,
+/// \c MissingNameOrigin exception will be thrown.  This must not be
+/// represented as a quoted string.
+///
+/// The type mnemonics must be valid, and separated by whitespace. If
+/// any invalid mnemonics are found, InvalidRdataText exception is
+/// thrown.
+///
+/// \throw MissingNameOrigin Thrown when the Next Domain Name is not absolute.
+/// \throw InvalidRdataText if any fields are out of their valid range.
+///
+/// \param nsec_str A string containing the RDATA to be created
+NSEC::NSEC(const std::string& nsec_str) :
+    impl_(NULL)
+{
+    try {
+        std::istringstream ss(nsec_str);
+        MasterLexer lexer;
+        lexer.pushSource(ss);
+
+        const Name origin_name(createNameFromLexer(lexer, NULL));
+
+        vector<uint8_t> typebits;
+        buildBitmapsFromLexer("NSEC", lexer, typebits);
+
+        impl_ = new NSECImpl(origin_name, typebits);
+
+        if (lexer.getNextToken().getType() != MasterToken::END_OF_FILE) {
+            isc_throw(InvalidRdataText,
+                      "Extra input text for NSEC: " << nsec_str);
+        }
+    } catch (const MasterLexer::LexerError& ex) {
+        isc_throw(InvalidRdataText,
+                  "Failed to construct NSEC from '" << nsec_str << "': "
+                  << ex.what());
+    }
+}
+
+NSEC::NSEC(InputBuffer& buffer, size_t rdata_len) {
+    const size_t pos = buffer.getPosition();
+    const Name nextname(buffer);
+
+    // rdata_len must be sufficiently large to hold non empty bitmap.
+    if (rdata_len <= buffer.getPosition() - pos) {
+        isc_throw(DNSMessageFORMERR,
+                  "NSEC RDATA from wire too short: " << rdata_len << "bytes");
+    }
+    rdata_len -= (buffer.getPosition() - pos);
+
+    vector<uint8_t> typebits(rdata_len);
+    buffer.readData(&typebits[0], rdata_len);
+    checkRRTypeBitmaps("NSEC", typebits);
+
+    impl_ = new NSECImpl(nextname, typebits);
+}
+
+/// \brief Constructor with a context of MasterLexer.
+///
+/// The \c lexer should point to the beginning of valid textual
+/// representation of an NSEC RDATA.
+///
+/// The Next Domain Name 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 type mnemonics must be valid, and separated by whitespace. If
+/// any invalid mnemonics are found, InvalidRdataText exception is
+/// thrown.
+///
+/// \throw MasterLexer::LexerError General parsing error such as
+/// missing field.
+/// \throw MissingNameOrigin Thrown when the Next Domain Name is not
+/// absolute and \c origin is NULL.
+/// \throw InvalidRdataText if any fields are out of their valid range.
+///
+/// \param lexer A \c MasterLexer object parsing a master file for the
+/// RDATA to be created
+/// \param origin The origin to use with a relative Next Domain Name
+/// field
+NSEC::NSEC(MasterLexer& lexer, const Name* origin, MasterLoader::Options,
+           MasterLoaderCallbacks&)
+{
+    const Name next_name(createNameFromLexer(lexer, origin));
+
+    vector<uint8_t> typebits;
+    buildBitmapsFromLexer("NSEC", lexer, typebits);
+
+    impl_ = new NSECImpl(next_name, typebits);
+}
+
+NSEC::NSEC(const NSEC& source) :
+    Rdata(), impl_(new NSECImpl(*source.impl_))
+{}
+
+NSEC&
+NSEC::operator=(const NSEC& source) {
+    if (this == &source) {
+        return (*this);
+    }
+
+    NSECImpl* newimpl = new NSECImpl(*source.impl_);
+    delete impl_;
+    impl_ = newimpl;
+
+    return (*this);
+}
+
+NSEC::~NSEC() {
+    delete impl_;
+}
+
+string
+NSEC::toText() const {
+    ostringstream s;
+    s << impl_->nextname_;
+    bitmapsToText(impl_->typebits_, s);
+    return (s.str());
+}
+
+void
+NSEC::toWire(OutputBuffer& buffer) const {
+    impl_->nextname_.toWire(buffer);
+    buffer.writeData(&impl_->typebits_[0], impl_->typebits_.size());
+}
+
+void
+NSEC::toWire(AbstractMessageRenderer& renderer) const {
+    // Type NSEC is not "well-known", and name compression must be disabled
+    // per RFC3597.
+    renderer.writeName(impl_->nextname_, false);
+    renderer.writeData(&impl_->typebits_[0], impl_->typebits_.size());
+}
+
+const Name&
+NSEC::getNextName() const {
+    return (impl_->nextname_);
+}
+
+int
+NSEC::compare(const Rdata& other) const {
+    const NSEC& other_nsec = dynamic_cast<const NSEC&>(other);
+
+    int cmp = compareNames(impl_->nextname_, other_nsec.impl_->nextname_);
+    if (cmp != 0) {
+        return (cmp);
+    }
+
+    const size_t this_len = impl_->typebits_.size();
+    const size_t other_len = other_nsec.impl_->typebits_.size();
+    const size_t cmplen = min(this_len, other_len);
+    cmp = memcmp(&impl_->typebits_[0], &other_nsec.impl_->typebits_[0],
+                 cmplen);
+    if (cmp != 0) {
+        return (cmp);
+    } else {
+        return ((this_len == other_len) ? 0 : (this_len < other_len) ? -1 : 1);
+    }
+}
+
+// END_RDATA_NAMESPACE
+// END_ISC_NAMESPACE