partial python wrapper implementation, see src/lib/dns/python/README for details

git-svn-id: svn://bind10.isc.org/svn/bind10/experiments/python-binding@1711 e5f2f494-b856-4b98-b285-d166d9295462

configure.ac

@@ -373,6 +373,7 @@ AC_CONFIG_FILES([Makefile
                  src/lib/config/tests/Makefile
                  src/lib/dns/Makefile
                  src/lib/dns/tests/Makefile
+                 src/lib/dns/python/Makefile
                  src/lib/dns-python/Makefile
                  src/lib/exceptions/Makefile
                  src/lib/auth/Makefile
@@ -409,6 +410,7 @@ AC_OUTPUT([src/bin/cfgmgr/b10-cfgmgr.py
            src/lib/config/tests/data_def_unittests_config.h
            src/lib/python/isc/config/tests/config_test
            src/lib/python/isc/cc/tests/cc_test
+           src/lib/dns/python/tests/libdns_python_test
            src/lib/dns/gen-rdatacode.py
            src/lib/dns/tests/testdata/gen-wiredata.py
           ], [
@@ -427,5 +429,6 @@ AC_OUTPUT([src/bin/cfgmgr/b10-cfgmgr.py
            chmod +x src/bin/msgq/msgq_test
            chmod +x src/lib/dns/gen-rdatacode.py
            chmod +x src/lib/dns/tests/testdata/gen-wiredata.py
+           chmod +x src/lib/dns/python/tests/libdns_python_test
           ])
 AC_OUTPUT

src/lib/dns/Makefile.am

@@ -1,4 +1,4 @@
-SUBDIRS = . tests
+SUBDIRS = . tests python
 
 AM_CPPFLAGS = -I$(top_srcdir)/src/lib -I$(top_builddir)/src/lib
 if GCC_WERROR_OK

src/lib/dns/python/Makefile

@@ -0,0 +1,588 @@
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+
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+#libdns_python_rrset_la_CPPFLAGS = $(AM_CPPFLAGS) $(PYTHON_INCLUDES)
+#libdns_python_rrset_la_LDFLAGS = $(PYTHON_LDFLAGS)
+
+# Python prefers .so, while some OSes (specifically MacOS) use a different
+# suffix for dynamic objects.  -module is necessary to work this around.
+libdns_python_la_LDFLAGS = $(PYTHON_LDFLAGS) -module
+libdns_python_la_LIBADD = $(top_builddir)/src/lib/dns/libdns.la \
+	$(top_builddir)/src/lib/exceptions/libexceptions.la \
+	$(PYTHON_LIB)
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+
+.SUFFIXES:
+.SUFFIXES: .cc .lo .o .obj
+$(srcdir)/Makefile.in:  $(srcdir)/Makefile.am  $(am__configure_deps)
+	@for dep in $?; do \
+	  case '$(am__configure_deps)' in \
+	    *$$dep*) \
+	      ( cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh ) \
+	        && { if test -f $@; then exit 0; else break; fi; }; \
+	      exit 1;; \
+	  esac; \
+	done; \
+	echo ' cd $(top_srcdir) && $(AUTOMAKE) --gnu src/lib/dns/python/Makefile'; \
+	$(am__cd) $(top_srcdir) && \
+	  $(AUTOMAKE) --gnu src/lib/dns/python/Makefile
+.PRECIOUS: Makefile
+Makefile: $(srcdir)/Makefile.in $(top_builddir)/config.status
+	@case '$?' in \
+	  *config.status*) \
+	    cd $(top_builddir) && $(MAKE) $(AM_MAKEFLAGS) am--refresh;; \
+	  *) \
+	    echo ' cd $(top_builddir) && $(SHELL) ./config.status $(subdir)/$@ $(am__depfiles_maybe)'; \
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+	  $(am__strip_dir) \
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+	@list='$(lib_LTLIBRARIES)'; for p in $$list; do \
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+
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+include ./$(DEPDIR)/libdns_python_la-libdns_python_common.Plo
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+	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
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+#	$(CXXCOMPILE) -c -o $@ $<
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+	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Po
+#	source='$<' object='$@' libtool=no \
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+#	$(CXXCOMPILE) -c -o $@ `$(CYGPATH_W) '$<'`
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+.cc.lo:
+	$(LTCXXCOMPILE) -MT $@ -MD -MP -MF $(DEPDIR)/$*.Tpo -c -o $@ $<
+	$(am__mv) $(DEPDIR)/$*.Tpo $(DEPDIR)/$*.Plo
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+#	$(LTCXXCOMPILE) -c -o $@ $<
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+libdns_python_la-libdns_python.lo: libdns_python.cc
+	$(LIBTOOL)  --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libdns_python_la_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT libdns_python_la-libdns_python.lo -MD -MP -MF $(DEPDIR)/libdns_python_la-libdns_python.Tpo -c -o libdns_python_la-libdns_python.lo `test -f 'libdns_python.cc' || echo '$(srcdir)/'`libdns_python.cc
+	$(am__mv) $(DEPDIR)/libdns_python_la-libdns_python.Tpo $(DEPDIR)/libdns_python_la-libdns_python.Plo
+#	source='libdns_python.cc' object='libdns_python_la-libdns_python.lo' libtool=yes \
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+libdns_python_la-libdns_python_common.lo: libdns_python_common.cc
+	$(LIBTOOL)  --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libdns_python_la_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -MT libdns_python_la-libdns_python_common.lo -MD -MP -MF $(DEPDIR)/libdns_python_la-libdns_python_common.Tpo -c -o libdns_python_la-libdns_python_common.lo `test -f 'libdns_python_common.cc' || echo '$(srcdir)/'`libdns_python_common.cc
+	$(am__mv) $(DEPDIR)/libdns_python_la-libdns_python_common.Tpo $(DEPDIR)/libdns_python_la-libdns_python_common.Plo
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+#	DEPDIR=$(DEPDIR) $(CXXDEPMODE) $(depcomp) \
+#	$(LIBTOOL)  --tag=CXX $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CXX) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libdns_python_la_CPPFLAGS) $(CPPFLAGS) $(AM_CXXFLAGS) $(CXXFLAGS) -c -o libdns_python_la-libdns_python_common.lo `test -f 'libdns_python_common.cc' || echo '$(srcdir)/'`libdns_python_common.cc
+
+mostlyclean-libtool:
+	-rm -f *.lo
+
+clean-libtool:
+	-rm -rf .libs _libs
+
+ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES)
+	list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \
+	unique=`for i in $$list; do \
+	    if test -f "$$i"; then echo $$i; else echo $(srcdir)/$$i; fi; \
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+	mkid -fID $$unique
+tags: TAGS
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+TAGS:  $(HEADERS) $(SOURCES)  $(TAGS_DEPENDENCIES) \
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+	if test -z "$(ETAGS_ARGS)$$*$$unique"; then :; else \
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+ctags: CTAGS
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src/lib/dns/python/Makefile.am

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src/lib/dns/python/README

@@ -0,0 +1,94 @@
+
+This is a partial implementation of the python wrappers for isc::dns.
+
+Currently, when compiled the module is called libdns_python. If we
+decide to use it we will add a default import under lib/python/isc.
+
+To use it from the source tree, you must add src/lib/dns/python/.libs
+to your PYTHONPATH environment variable. Within python you can then use
+> import libdns_python
+> rrc = libdns_python.RRClass("IN")
+
+Notes:
+
+this implementation is far from complete; currently wrappers for the
+following classes are implemented:
+
+full (though we might add some conveniences later, like __str__):
+RRType, RRClass, RRTTL, Name, and MessageRenderer
+
+partial:
+RRset (doesn't have a way to iterate over rdata yet)
+Rdata (only the most basic support, you can create one from a type,
+class and string, and you can convert them to text, but that's about
+it).
+
+We did not implement the buffer classes; everywhere in the API where
+buffers are used, you can pass a bytearray object.
+
+The 'main' module is defined in libdns_python.cc.
+There is a libdns_python_common.[cc|h] for helper functions.
+
+Implementation notes:
+
+Writing wrappers for a lot of classes is mostly a case of repetition.
+There are a lot of things one must do, and that is why nearly everyone
+immediately and continually has the urge to make generators for this.
+
+We have added a little more documentation than is strictly necessary to
+rrclass.h, for reference to new readers.
+
+To keep it maintainable as the original API changes, we use two
+techniques;
+
+1. Full unittests. Or at least as full as possible. All unittests from
+   the C++ code will also appear in the python wrapper tests (currently
+   only done for rrtype and rrset as far as implemented), so if we
+   forget to update a wrapper our tests should fail.
+2. Structure. I have tried to structure the wrapper files as much as
+   possible, see below.
+
+Structure:
+
+Since we are moving a lot of wrappers into one module, the specific
+classes are split over several files, each one having the name of the
+original header file they are wrapping (e.g. the wrapper for name.h
+becomes name_python.cc).
+
+At the top we first declare any exceptions, constants, and enums. These
+are all called po_<C++-name> (the actual python name will be set once
+they are added to the module in the module inialization function).
+
+Each class needs a struct that contains a pointer to an instance of the
+object (and any helper data). We call these structs s_<C++ class name>.
+
+Then we declare (but not define!) all methods we will export to
+python. These are named <C++ class name>_<C++ method name>.
+
+We will also need an _init and _destroy function for all of these.
+
+After the function declarations we define the method array; this
+contains the name of the methods as they appear in python, the wrapping
+function here, and documentation strings.
+
+Next is the type description; this is used for the wrapper code to
+convert native classes from and to python objects, and defines
+type-specific pointers (for instance to the method table mentioned above,
+but also to a __str__ function should one be defined, how the object
+should behave when it is used as a Sequence, etc.). For most classes,
+almost all values here shall be NULL.
+This has the name <lowercase C++ class name>_type.
+
+After that we define the exported functions we defined earlier. In some
+cases these need the type we just defined, and the type needed the
+function names, so for consistency, all functions are defined after,
+but declared before the type.
+
+This is repeated for every class we export.
+
+Finally we define the function to add the class, constants, exceptions,
+and enums to the module. This function is called from the init function
+in libdns_python.cc, has the name
+initModulePart_<c++ class name>, returns a boolean
+(true on success, false on failure), and takes the module as a
+PyObject*.

src/lib/dns/python/libdns_python.cc

@@ -0,0 +1,92 @@
+
+// Ok we want a lot of different parts of the DNS API in the python
+// module, but not one big 10000-line file.
+// So we split it up in several 'mini-modules'
+// These would be the same as a single module, except for
+// the init function, which has to be modified to a unique
+// name initModulePart_<name>, and return true/false instead of
+// NULL/*mod
+//
+// And of course care has to be taken that all identifiers be unique
+
+// 
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+
+#include "config.h"
+
+#include <exceptions/exceptions.h>
+
+#include <dns/buffer.h>
+#include <dns/exceptions.h>
+#include <dns/name.h>
+#include <dns/messagerenderer.h>
+
+#include "libdns_python_common.h"
+
+//#include "buffer_python.cc"
+// order is important here! (TODO: document dependencies)
+#include "name_python.cc"
+#include "messagerenderer_python.cc"
+#include "rrclass_python.cc"
+#include "rrtype_python.cc"
+#include "rrttl_python.cc"
+#include "rdata_python.cc"
+#include "rrset_python.cc"
+
+//
+// Definition of the module
+//
+static PyModuleDef libdns_python = {
+    { PyObject_HEAD_INIT(NULL) NULL, 0, NULL},
+    "libdns_python",
+    "Python bindings for isc.dns",
+    -1,
+    NULL,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+PyMODINIT_FUNC
+PyInit_libdns_python(void)
+{
+    PyObject *mod = PyModule_Create(&libdns_python);
+    if (mod == NULL) {
+        return NULL;
+    }
+
+    // for each part included above, we call its specific initializer
+
+    if (!initModulePart_Name(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_MessageRenderer(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_RRClass(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_RRType(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_RRTTL(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_Rdata(mod)) {
+        return NULL;
+    }
+
+    if (!initModulePart_RRset(mod)) {
+        return NULL;
+    }
+
+    return mod;
+}
+

src/lib/dns/python/libdns_python_common.cc

@@ -0,0 +1,48 @@
+// Copyright (C) 2009  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 <Python.h>
+
+int
+readDataFromSequence(uint8_t *data, size_t len, PyObject* sequence)
+{
+    PyObject* el = NULL;
+    for (size_t i = 0; i < len; i++) {
+        el = PySequence_GetItem(sequence, 0);
+        if (!el) {
+            PyErr_SetString(PyExc_TypeError,
+                "sequence too short");
+            return -1;
+        }
+        if (PyLong_Check(el)) {
+            long l = PyLong_AsLong(el);
+            if (l < 0 || l > 255) {
+                PyErr_SetString(PyExc_TypeError,
+                    "number in fromWire sequence not between 0 and 255");
+                return -1;
+            }
+            data[i] = (uint8_t) PyLong_AsLong(el);
+            PySequence_DelItem(sequence, 0);
+        } else {
+            PyErr_SetString(PyExc_TypeError,
+                "not a number in fromWire sequence");
+            return -1;
+        }
+    }
+    return 0;
+}
+
+

src/lib/dns/python/libdns_python_common.h

@@ -0,0 +1,32 @@
+// Copyright (C) 2009  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.
+
+// $Id$
+
+
+//
+// Shared functions for python/c API
+//
+
+// This function reads 'bytes' from a sequence
+// This sequence can be anything that implements the Sequence interface,
+// but must consist of Numbers between 0 and 255 for every value.
+//
+// The data is stored in *data.
+// Data must be allocated and have at least len bytes available.
+//
+// The current implementation removes read items from the
+// head of the sequence (even if it fails it removes everything that
+// it successfully read)
+int readDataFromSequence(uint8_t *data, size_t len, PyObject* sequence);

src/lib/dns/python/messagerenderer_python.cc

@@ -0,0 +1,175 @@
+// Copyright (C) 2009  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/messagerenderer.h>
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+using namespace isc::dns;
+
+// MessageRenderer
+
+// since we don't use *Buffer in the python version (but work with
+// the already existing bytearray type where we use these custom buffers
+// in c++, we need to keep track of one here.
+typedef struct {
+    PyObject_HEAD
+    OutputBuffer* outputbuffer;
+    MessageRenderer* messagerenderer;
+} s_MessageRenderer;
+
+static int MessageRenderer_init(s_MessageRenderer* self);
+static void MessageRenderer_destroy(s_MessageRenderer* self);
+
+static PyObject* MessageRenderer_getData(s_MessageRenderer* self);
+static PyObject* MessageRenderer_getLength(s_MessageRenderer* self);
+static PyObject* MessageRenderer_isTruncated(s_MessageRenderer* self);
+static PyObject* MessageRenderer_getLengthLimit(s_MessageRenderer* self);
+
+static PyMethodDef MessageRenderer_methods[] = {
+    { "get_data", (PyCFunction)MessageRenderer_getData, METH_NOARGS, "Return the data" },
+    { "get_length", (PyCFunction)MessageRenderer_getLength, METH_NOARGS, "Return the length of the data" },
+    { "is_truncated", (PyCFunction)MessageRenderer_isTruncated, METH_NOARGS, "Returns True if the data is truncated" },
+    { "get_length_limit", (PyCFunction)MessageRenderer_getLengthLimit, METH_NOARGS, "Return the length limit of the data" },
+    { NULL, NULL, 0, NULL }
+};
+
+static PyTypeObject messagerenderer_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.MessageRenderer",
+    sizeof(s_MessageRenderer),                       /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)MessageRenderer_destroy,   /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    NULL,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ MessageRenderer Object",  /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    NULL,                               /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    MessageRenderer_methods,                       /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)MessageRenderer_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+MessageRenderer_init(s_MessageRenderer* self)
+{
+    self->outputbuffer = new OutputBuffer(4096);
+    self->messagerenderer = new MessageRenderer(*self->outputbuffer);
+    return 0;
+}
+
+static void
+MessageRenderer_destroy(s_MessageRenderer* self)
+{
+    delete self->messagerenderer;
+    delete self->outputbuffer;
+    self->messagerenderer = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+MessageRenderer_getData(s_MessageRenderer* self)
+{
+    return Py_BuildValue("y#", self->messagerenderer->getData(), self->messagerenderer->getLength());
+}
+
+static PyObject*
+MessageRenderer_getLength(s_MessageRenderer* self)
+{
+    return Py_BuildValue("I", self->messagerenderer->getLength());
+}
+
+static PyObject*
+MessageRenderer_isTruncated(s_MessageRenderer* self)
+{
+    if (self->messagerenderer->isTruncated())
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+
+static PyObject*
+MessageRenderer_getLengthLimit(s_MessageRenderer* self)
+{
+    return Py_BuildValue("I", self->messagerenderer->getLengthLimit());
+}
+
+// end of MessageRenderer
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_MessageRenderer(PyObject* mod)
+{
+    // Add the exceptions to the module
+
+    // Add the enums to the module
+
+    // Add the constants to the module
+
+    // Add the classes to the module
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module
+
+    // NameComparisonResult
+    if (PyType_Ready(&messagerenderer_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&messagerenderer_type);
+    PyModule_AddObject(mod, "MessageRenderer",
+                       (PyObject*) &messagerenderer_type);
+    
+    return true;
+}
+
+

src/lib/dns/python/name_python.cc

@@ -0,0 +1,651 @@
+// Copyright (C) 2009  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.
+
+// $Id$
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the module init at the
+// end
+//
+static PyObject* po_EmptyLabel;
+static PyObject* po_TooLongName;
+static PyObject* po_TooLongLabel;
+static PyObject* po_BadLabelType;
+static PyObject* po_BadEscape;
+static PyObject* po_IncompleteName;
+static PyObject* po_InvalidBufferPosition;
+static PyObject* po_DNSMessageFORMERR;
+// This one's for our 'general' exception
+// TODO: does this need an according general class?
+// should we replace it with some more direct base exception?
+static PyObject* po_IscException;
+
+//
+// Declaration of enums
+// Initialization and addition of these go in the module init at the
+// end
+//
+static PyObject* po_NameRelation;
+
+//
+// Declaration of class constants
+// Initialization and addition of these go in the module init at the
+// end
+//
+static PyObject* po_MAX_WIRE;
+static PyObject* po_MAX_LABELS;
+static PyObject* po_MAX_LABELLEN;
+static PyObject* po_MAX_COMPRESS_POINTER;
+static PyObject* po_COMPRESS_POINTER_MARK8;
+static PyObject* po_COMPRESS_POINTER_MARK16;
+static PyObject* po_ROOT_NAME;
+
+
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+using namespace isc::dns;
+
+// NameComparisonResult
+typedef struct {
+    PyObject_HEAD
+    isc::dns::NameComparisonResult* ncr;
+} s_NameComparisonResult;
+
+static int NameComparisonResult_init(s_NameComparisonResult* self UNUSED_PARAM, PyObject* args UNUSED_PARAM);
+static void NameComparisonResult_destroy(s_NameComparisonResult* self);
+static PyObject* NameComparisonResult_getOrder(s_NameComparisonResult* self);
+static PyObject* NameComparisonResult_getCommonLabels(s_NameComparisonResult* self);
+static PyObject* NameComparisonResult_getRelation(s_NameComparisonResult* self);
+
+static PyMethodDef NameComparisonResult_methods[] = {
+    { "getOrder", (PyCFunction)NameComparisonResult_getOrder, METH_NOARGS, "Return the order" },
+    { "getCommonLabels", (PyCFunction)NameComparisonResult_getCommonLabels, METH_NOARGS, "Return the number of common labels" },
+    { "getRelation", (PyCFunction)NameComparisonResult_getRelation, METH_NOARGS, "Return the relation" },
+    { NULL, NULL, 0, NULL }
+};
+
+static PyTypeObject name_comparison_result_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.NameComparisonResult",
+    sizeof(s_NameComparisonResult),                       /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)NameComparisonResult_destroy,   /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    NULL,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ NameComparisonResult Object",  /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    NULL,                               /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    NameComparisonResult_methods,                       /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)NameComparisonResult_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+// TODO: is there also a way to just not define it?
+static int
+NameComparisonResult_init(s_NameComparisonResult* self UNUSED_PARAM, PyObject* args UNUSED_PARAM) {
+    PyErr_SetString(PyExc_NotImplementedError,
+                    "NameComparisonResult can't be built directly");
+    return -1;
+}
+
+static void
+NameComparisonResult_destroy(s_NameComparisonResult* self) {
+    delete self->ncr;
+    self->ncr = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject* 
+NameComparisonResult_getOrder(s_NameComparisonResult* self) {
+    return Py_BuildValue("i", self->ncr->getOrder());
+}
+
+static PyObject* 
+NameComparisonResult_getCommonLabels(s_NameComparisonResult* self) {
+    return Py_BuildValue("I", self->ncr->getCommonLabels());
+}
+
+static PyObject* 
+NameComparisonResult_getRelation(s_NameComparisonResult* self) {
+    return Py_BuildValue("I", self->ncr->getRelation());
+}
+
+// end of NameComparisonResult
+
+// Name
+typedef struct {
+    PyObject_HEAD
+    isc::dns::Name* name;
+    size_t position;
+} s_Name;
+
+static int Name_init(s_Name* self, PyObject* args);
+static void Name_destroy(s_Name* self);
+
+static PyObject* Name_toWire(s_Name* self);
+static PyObject* Name_toText(s_Name* self);
+static PyObject* Name_getLabelCount(s_Name* self);
+static PyObject* Name_at(s_Name* self, PyObject* args);
+static PyObject* Name_getLength(s_Name* self);
+
+static PyObject* Name_compare(s_Name* self, PyObject* args);
+static PyObject* Name_equals(s_Name* self, PyObject* args);
+
+static PyObject* Name_richcmp(s_Name* n1, s_Name* n2, int op);
+static PyObject* Name_split(s_Name* self, PyObject* args);
+static PyObject* Name_reverse(s_Name* self);
+static PyObject* Name_concatenate(s_Name* self, PyObject* args);
+static PyObject* Name_downcase(s_Name* self);
+static PyObject* Name_isWildCard(s_Name* self);
+
+static PyMethodDef Name_methods[] = {
+    { "at", (PyCFunction)Name_at, METH_VARARGS, "Return the int value of the name data at the specified position" },
+    { "get_length", (PyCFunction)Name_getLength, METH_NOARGS, "Return the length" },
+    { "get_labelcount", (PyCFunction)Name_getLabelCount, METH_NOARGS, "Return the number of labels" },
+    { "to_text", (PyCFunction)Name_toText, METH_NOARGS, "Return the string representation" },
+    { "to_wire", (PyCFunction)Name_toWire, METH_NOARGS, "Return the wire format" },
+    { "compare", (PyCFunction)Name_compare, METH_VARARGS, "Compare" },
+    { "equals", (PyCFunction)Name_equals, METH_VARARGS, "Equals" },
+    { "split", (PyCFunction)Name_split, METH_VARARGS, "split" },
+    { "reverse", (PyCFunction)Name_reverse, METH_NOARGS, "reverse" },
+    { "concatenate", (PyCFunction)Name_concatenate, METH_VARARGS, "concatenate" },
+    { "downcase", (PyCFunction)Name_downcase, METH_NOARGS, "downcase" },
+    { "is_wildcard", (PyCFunction)Name_isWildCard, METH_NOARGS, "isWildCard" },
+    { NULL, NULL, 0, NULL }
+};
+
+static PyTypeObject name_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.Name",
+    sizeof(s_Name),                       /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)Name_destroy,   /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    NULL,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ Name Object",  /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    (richcmpfunc)Name_richcmp,                               /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    Name_methods,                       /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)Name_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+
+static int
+Name_init(s_Name* self, PyObject* args)
+{
+    const char* s;
+    PyObject* downcase = Py_False;
+
+    /* fromText */
+    if (PyArg_ParseTuple(args, "s|O!", &s, &PyBool_Type, &downcase)) {
+        try {
+            const std::string n(s);
+
+            self->name = new Name(n, downcase == Py_True);
+            self->position = 0;
+        } catch (EmptyLabel) {
+            PyErr_SetString(po_EmptyLabel, "EmptyLabel");
+            return -1;
+        } catch (TooLongLabel) {
+            PyErr_SetString(po_TooLongLabel, "TooLongLabel");
+            return -1;
+        } catch (BadLabelType) {
+            PyErr_SetString(po_BadLabelType, "BadLabelType");
+            return -1;
+        } catch (BadEscape) {
+            PyErr_SetString(po_BadEscape, "BadEscape");
+            return -1;
+        } catch (TooLongName) {
+            PyErr_SetString(po_TooLongName, "TooLongName");
+            return -1;
+        } catch (IncompleteName) {
+            PyErr_SetString(po_IncompleteName, "IncompleteName");
+            return -1;
+#ifdef CATCHMEMERR
+        } catch (std::bad_alloc) {
+            PyErr_NoMemory();
+            return -1;
+#endif
+        } catch (...) {
+            PyErr_SetString(po_IscException, "Unexpected?!");
+            return -1;
+        }
+        return 0;
+    }
+    PyErr_Clear();
+
+    const char* b;
+    Py_ssize_t len;
+    unsigned int position;
+
+    /* fromWire */
+    if (PyArg_ParseTuple(args, "y#I|O!", &b, &len, &position,
+                         &PyBool_Type, &downcase)) {
+        try {
+            InputBuffer buffer(b, len);
+
+            buffer.setPosition(position);
+            self->name = new Name(buffer, downcase == Py_True);
+            self->position = buffer.getPosition();
+        } catch (InvalidBufferPosition) {
+            PyErr_SetString(po_InvalidBufferPosition,
+                            "InvalidBufferPosition");
+            return -1;
+        } catch (TooLongName) {
+            PyErr_SetString(po_TooLongName, "TooLongName");
+            return -1;
+        } catch (BadLabelType) {
+            PyErr_SetString(po_BadLabelType, "BadLabelType");
+            return -1;
+        } catch (DNSMessageFORMERR) {
+            PyErr_SetString(po_DNSMessageFORMERR, "DNSMessageFORMERR");
+            return -1;
+        } catch (IncompleteName) {
+            PyErr_SetString(po_IncompleteName, "IncompleteName");
+            return -1;
+#ifdef CATCHMEMERR
+        } catch (std::bad_alloc) {
+            PyErr_NoMemory();
+            return -1;
+#endif
+        } catch (...) {
+            PyErr_SetString(po_IscException, "Unexpected?!");
+            return -1;
+        }
+        return 0;
+    }
+
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "fromText and fromWire Name constructors don't match");
+    return -1;
+}
+
+static void
+Name_destroy(s_Name* self)
+{
+    delete self->name;
+    self->name = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+Name_at(s_Name* self, PyObject* args)
+{
+    size_t pos;
+    if (!PyArg_ParseTuple(args, "i", &pos)) {
+        return NULL;
+    }
+    try {
+        return Py_BuildValue("i", self->name->at(pos));
+    } catch (isc::OutOfRange oor) {
+        PyErr_SetString(PyExc_IndexError,
+                        "name index out of range");
+        return NULL;
+    }
+}
+
+static PyObject*
+Name_getLength(s_Name* self)
+{
+    return Py_BuildValue("i", self->name->getLength());
+}
+
+static PyObject*
+Name_getLabelCount(s_Name* self)
+{
+    return Py_BuildValue("i", self->name->getLabelCount());
+}
+
+static PyObject*
+Name_toText(s_Name* self)
+{
+    return Py_BuildValue("s", self->name->toText().c_str());
+}
+
+// XX TODO: renderer and direct versions
+static PyObject*
+Name_toWire(s_Name* self)
+{
+    OutputBuffer buffer(255);
+
+    self->name->toWire(buffer);
+    return Py_BuildValue("y#", buffer.getData(),
+                         (Py_ssize_t) buffer.getLength());
+}
+
+static PyObject*
+Name_compare(s_Name* self, PyObject* args) {
+    s_Name* other;
+
+    if (!PyArg_ParseTuple(args, "O!", &name_type, (PyObject* *) &other))
+        return NULL;
+
+    s_NameComparisonResult* ret = PyObject_New(s_NameComparisonResult, &name_comparison_result_type);
+    if (ret != NULL) {
+        ret->ncr = new NameComparisonResult(
+            self->name->compare(*other->name));
+        if (ret->ncr == NULL) {
+            Py_DECREF(ret);
+            return NULL;
+        }
+    }
+    return (PyObject*) ret;
+}
+
+static PyObject* 
+Name_equals(s_Name* self, PyObject* args) {
+    s_Name* other;
+
+    if (!PyArg_ParseTuple(args, "O!", &name_type, (PyObject* *) &other))
+        return NULL;
+
+    if (self->name->equals(*other->name))
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+
+static PyObject* 
+Name_split(s_Name* self, PyObject* args)
+{
+    unsigned int first, n;
+
+    if (!PyArg_ParseTuple(args, "II", &first, &n))
+        return NULL;
+
+    s_Name* ret = PyObject_New(s_Name, &name_type);
+    if (ret != NULL) {
+        ret->name = NULL;
+        try {
+            ret->name = new Name(self->name->split(first, n));
+        } catch(isc::OutOfRange oor) {
+            PyErr_SetString(PyExc_IndexError, oor.what());
+            ret->name = NULL;
+        }
+        if (ret->name == NULL) {
+            Py_DECREF(ret);
+            return NULL;
+        }
+    }
+    return (PyObject*) ret;
+}
+
+static PyObject* 
+Name_richcmp(s_Name* n1, s_Name* n2, int op)
+{
+    bool c;
+
+    switch (op) {
+    case Py_LT:
+        c = n1->name->lthan(*n2->name);
+        break;
+    case Py_LE:
+        c = n1->name->leq(*n2->name);
+        break;
+    case Py_EQ:
+        c = n1->name->equals(*n2->name);
+        break;
+    case Py_NE:
+        c = n1->name->nequals(*n2->name);
+        break;
+    case Py_GT:
+        c = n1->name->gthan(*n2->name);
+        break;
+    case Py_GE:
+        c = n1->name->geq(*n2->name);
+        break;
+    default:
+        assert(0);              // XXX: should trigger an exception
+    }
+    if (c)
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+
+static PyObject*
+Name_reverse(s_Name* self)
+{
+    s_Name* ret = PyObject_New(s_Name, &name_type);
+
+    if (ret != NULL) {
+        ret->name = new Name(self->name->reverse());
+        if (ret->name == NULL) {
+            Py_DECREF(ret);
+            return NULL;
+        }
+    }
+    return (PyObject*) ret;
+}
+
+static PyObject*
+Name_concatenate(s_Name* self, PyObject* args)
+{
+    s_Name* other;
+
+    if (!PyArg_ParseTuple(args, "O!", &name_type, (PyObject**) &other))
+        return NULL;
+
+    s_Name* ret = PyObject_New(s_Name, &name_type);
+    if (ret != NULL) {
+        try {
+            ret->name = new Name(self->name->concatenate(*other->name));
+        } catch (isc::dns::TooLongName tln) {
+            PyErr_SetString(PyExc_IndexError, tln.what());
+            ret->name = NULL;
+        }
+        if (ret->name == NULL) {
+            Py_DECREF(ret);
+            return NULL;
+        }
+    }
+    return (PyObject*) ret;
+}
+
+static PyObject*
+Name_downcase(s_Name* self)
+{
+    self->name->downcase();
+    Py_RETURN_NONE;
+}
+
+static PyObject*
+Name_isWildCard(s_Name* self)
+{
+    if (self->name->isWildcard()) {
+        Py_RETURN_TRUE;
+    } else {
+        Py_RETURN_FALSE;
+    }
+}
+// end of Name
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_Name(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_EmptyLabel = PyErr_NewException("libdns_python.EmptyLabel", NULL, NULL);
+    Py_INCREF(po_EmptyLabel);
+    PyModule_AddObject(mod, "EmptyLabel", po_EmptyLabel);
+
+    po_TooLongName = PyErr_NewException("libdns_python.TooLongName", NULL, NULL);
+    Py_INCREF(po_TooLongName);
+    PyModule_AddObject(mod, "TooLongName", po_TooLongName);
+
+    po_TooLongLabel = PyErr_NewException("libdns_python.TooLongLabel", NULL, NULL);
+    Py_INCREF(po_TooLongLabel);
+    PyModule_AddObject(mod, "TooLongLabel", po_TooLongLabel);
+
+    po_BadLabelType = PyErr_NewException("libdns_python.BadLabelType", NULL, NULL);
+    Py_INCREF(po_BadLabelType);
+    PyModule_AddObject(mod, "BadLabelType", po_BadLabelType);
+
+    po_BadEscape = PyErr_NewException("libdns_python.BadEscape", NULL, NULL);
+    Py_INCREF(po_BadEscape);
+    PyModule_AddObject(mod, "BadEscape", po_BadEscape);
+
+    po_IncompleteName = PyErr_NewException("libdns_python.IncompleteName", NULL, NULL);
+    Py_INCREF(po_IncompleteName);
+    PyModule_AddObject(mod, "IncompleteName", po_IncompleteName);
+
+    po_InvalidBufferPosition = PyErr_NewException("libdns_python.InvalidBufferPosition", NULL, NULL);
+    Py_INCREF(po_InvalidBufferPosition);
+    PyModule_AddObject(mod, "InvalidBufferPosition", po_InvalidBufferPosition);
+
+    po_DNSMessageFORMERR = PyErr_NewException("libdns_python.DNSMessageFORMERR", NULL, NULL);
+    Py_INCREF(po_DNSMessageFORMERR);
+    PyModule_AddObject(mod, "DNSMessageFORMERR", po_DNSMessageFORMERR);
+
+    po_IscException = PyErr_NewException("libdns_python.IscException", NULL, NULL);
+    Py_INCREF(po_IncompleteName);
+    PyModule_AddObject(mod, "IscException", po_IscException);
+
+    // Add the enums to the module
+    po_NameRelation = Py_BuildValue("{i:s,i:s,i:s,i:s}",
+                                    0, "SUPERDOMAIN",
+                                    1, "SUBDOMAIN",
+                                    2, "EQUAL",
+                                    3, "COMMONANCESTOR");
+    Py_INCREF(po_NameRelation);
+    PyModule_AddObject(mod, "NameRelation", po_NameRelation);
+
+    // Add the constants to the module
+    po_MAX_WIRE = Py_BuildValue("I", 255U);
+    Py_INCREF(po_MAX_WIRE);
+    PyModule_AddObject(mod, "MAX_WIRE", po_MAX_WIRE);
+    po_MAX_LABELS = Py_BuildValue("I", 128U);
+    Py_INCREF(po_MAX_LABELS);
+    PyModule_AddObject(mod, "MAX_LABELS", po_MAX_LABELS);
+    po_MAX_LABELLEN = Py_BuildValue("I", 63U);
+    Py_INCREF(po_MAX_LABELLEN);
+    PyModule_AddObject(mod, "MAX_LABELLEN", po_MAX_LABELLEN);
+    po_MAX_COMPRESS_POINTER = Py_BuildValue("I", 0x3fffU);
+    Py_INCREF(po_MAX_COMPRESS_POINTER);
+    PyModule_AddObject(mod, "MAX_COMPRESS_POINTER", po_MAX_COMPRESS_POINTER);
+    po_COMPRESS_POINTER_MARK8 = Py_BuildValue("I", 0xc0U);
+    Py_INCREF(po_COMPRESS_POINTER_MARK8);
+    PyModule_AddObject(mod, "COMPRESS_POINTER_MARK8", po_COMPRESS_POINTER_MARK8);
+    po_COMPRESS_POINTER_MARK16 = Py_BuildValue("I", 0xc000U);
+    Py_INCREF(po_COMPRESS_POINTER_MARK16);
+    PyModule_AddObject(mod, "COMPRESS_POINTER_MARK16", po_COMPRESS_POINTER_MARK16);
+    s_Name* root_name = PyObject_New(s_Name, &name_type);
+    root_name->name = new Name(".");
+    po_ROOT_NAME = (PyObject*) root_name;
+    Py_INCREF(po_ROOT_NAME);
+    PyModule_AddObject(mod, "ROOT_NAME", po_ROOT_NAME);
+
+    // Add the classes to the module
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module
+
+    // NameComparisonResult
+    if (PyType_Ready(&name_comparison_result_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&name_comparison_result_type);
+    PyModule_AddObject(mod, "NameComparisonResult",
+                       (PyObject*) &name_comparison_result_type);
+    
+    if (PyType_Ready(&name_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&name_type);
+    PyModule_AddObject(mod, "Name",
+                       (PyObject*) &name_type);
+    
+    return true;
+}

src/lib/dns/python/rdata_python.cc

@@ -0,0 +1,228 @@
+// Copyright (C) 2009  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/rdata.h>
+using namespace isc::dns;
+using namespace isc::dns::rdata;
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the initModulePart
+// function at the end of this file
+//
+static PyObject* po_InvalidRdataLength;
+static PyObject* po_InvalidRdataText;
+static PyObject* po_CharStringTooLong;
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+
+//
+// Rdata
+//
+
+// The s_* Class simply coverst one instantiation of the object
+typedef struct {
+    PyObject_HEAD
+    RdataPtr rdata;
+} s_Rdata;
+
+//
+// We declare the functions here, the definitions are below
+// the type definition of the object, since both can use the other
+//
+
+// General creation and destruction
+static int Rdata_init(s_Rdata* self, PyObject* args);
+static void Rdata_destroy(s_Rdata* self);
+
+// These are the functions we export
+static PyObject* Rdata_toText(s_Rdata* self);
+// This is a second version of toText, we need one where the argument
+// is a PyObject*, for the str() function in python.
+static PyObject* Rdata_str(PyObject* self);
+static PyObject* Rdata_toWire(s_Rdata* self, PyObject* args);
+
+// This list contains the actual set of functions we have in
+// python. Each entry has
+// 1. Python method name
+// 2. Our static function here
+// 3. Argument type
+// 4. Documentation
+static PyMethodDef Rdata_methods[] = {
+    { "to_text", (PyCFunction)Rdata_toText, METH_NOARGS, "Return the string representation" },
+    { "to_wire", (PyCFunction)Rdata_toWire, METH_VARARGS, "wire format" },
+    { NULL, NULL, 0, NULL }
+};
+
+// This defines the complete type for reflection in python and
+// parsing of PyObject* to s_Rdata
+// Most of the functions are not actually implemented and NULL here.
+static PyTypeObject rdata_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.Rdata",
+    sizeof(s_Rdata),                  /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)Rdata_destroy,        /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    Rdata_str,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ Rdata Object",                 /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    NULL,                               /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    Rdata_methods,                    /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)Rdata_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+Rdata_init(s_Rdata* self, PyObject* args)
+{
+    s_RRType* rrtype;
+    s_RRClass* rrclass;
+    const char* s;
+    
+    if (PyArg_ParseTuple(args, "O!O!s", &rrtype_type, &rrtype,
+                                        &rrclass_type, &rrclass,
+                                        &s, &s
+       )) {
+        const std::string str(s);
+        self->rdata = createRdata(*rrtype->rrtype, *rrclass->rrclass, s);
+        return 0;
+    }
+
+    return -1;
+}
+
+static void
+Rdata_destroy(s_Rdata* self)
+{
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+Rdata_toText(s_Rdata* self)
+{
+    // Py_BuildValue makes python objects from native data
+    return Py_BuildValue("s", self->rdata->toText().c_str());
+}
+
+static PyObject*
+Rdata_str(PyObject* self)
+{
+    // Simply call the to_text method we already defined
+    return PyObject_CallMethod(self, (char*)"to_text", (char*)"");
+}
+
+static PyObject*
+Rdata_toWire(s_Rdata* self, PyObject* args)
+{
+    PyObject* bytes;
+    s_MessageRenderer* mr;
+    
+    if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+        PyObject* bytes_o = bytes;
+        
+        OutputBuffer buffer(2);
+        self->rdata->toWire(buffer);
+        PyObject* n = PyBytes_FromStringAndSize((const char*) buffer.getData(), buffer.getLength());
+        PyObject* result = PySequence_InPlaceConcat(bytes_o, n);
+        // We need to release the object we temporarily created here
+        // to prevent memory leak
+        Py_DECREF(n);
+        return result;
+    } else if (PyArg_ParseTuple(args, "O!", &messagerenderer_type, (PyObject**) &mr)) {
+        self->rdata->toWire(*mr->messagerenderer);
+        // If we return NULL it is seen as an error, so use this for
+        // None returns
+        Py_RETURN_NONE;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "toWire argument must be a sequence object or a MessageRenderer");
+    return NULL;
+}
+
+// end of Rdata
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_Rdata(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_InvalidRdataLength = PyErr_NewException("libdns_python.InvalidRdataLength", NULL, NULL);
+    Py_INCREF(po_InvalidRdataLength);
+    PyModule_AddObject(mod, "InvalidRdataLength", po_InvalidRdataLength);
+    po_InvalidRdataText = PyErr_NewException("libdns_python.InvalidRdataText", NULL, NULL);
+    Py_INCREF(po_InvalidRdataText);
+    PyModule_AddObject(mod, "InvalidRdataText", po_InvalidRdataText);
+    po_CharStringTooLong = PyErr_NewException("libdns_python.CharStringTooLong", NULL, NULL);
+    Py_INCREF(po_CharStringTooLong);
+    PyModule_AddObject(mod, "CharStringTooLong", po_CharStringTooLong);
+
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module. This is not just a check! (leaving
+    // this out results in segmentation faults)
+    if (PyType_Ready(&rdata_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&rdata_type);
+    PyModule_AddObject(mod, "Rdata",
+                       (PyObject*) &rdata_type);
+    
+    return true;
+}

src/lib/dns/python/rrclass_python.cc

@@ -0,0 +1,306 @@
+// Copyright (C) 2009  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/rrclass.h>
+using namespace isc::dns;
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the initModulePart
+// function at the end of this file
+//
+static PyObject* po_InvalidRRClass;
+static PyObject* po_IncompleteRRClass;
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+
+//
+// RRClass
+//
+
+// The s_* Class simply coverst one instantiation of the object
+typedef struct {
+    PyObject_HEAD
+    RRClass* rrclass;
+} s_RRClass;
+
+//
+// We declare the functions here, the definitions are below
+// the type definition of the object, since both can use the other
+//
+
+// General creation and destruction
+static int RRClass_init(s_RRClass* self, PyObject* args);
+static void RRClass_destroy(s_RRClass* self);
+
+// These are the functions we export
+static PyObject* RRClass_toText(s_RRClass* self);
+// This is a second version of toText, we need one where the argument
+// is a PyObject*, for the str() function in python.
+static PyObject* RRClass_str(PyObject* self);
+static PyObject* RRClass_toWire(s_RRClass* self, PyObject* args);
+static PyObject* RRClass_getCode(s_RRClass* self);
+static PyObject* RRClass_richcmp(s_RRClass* self, s_RRClass* other, int op);
+
+// This list contains the actual set of functions we have in
+// python. Each entry has
+// 1. Python method name
+// 2. Our static function here
+// 3. Argument type
+// 4. Documentation
+static PyMethodDef RRClass_methods[] = {
+    { "to_text", (PyCFunction)RRClass_toText, METH_NOARGS, "Return the string representation" },
+    { "to_wire", (PyCFunction)RRClass_toWire, METH_VARARGS, "to wire format" },
+    { "get_code", (PyCFunction)RRClass_getCode, METH_NOARGS, "Return the class code as an integer" },
+    { NULL, NULL, 0, NULL }
+};
+
+// This defines the complete type for reflection in python and
+// parsing of PyObject* to s_RRClass
+// Most of the functions are not actually implemented and NULL here.
+static PyTypeObject rrclass_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.RRClass",
+    sizeof(s_RRClass),                  /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)RRClass_destroy,        /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    RRClass_str,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ RRClass Object",               /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    (richcmpfunc)RRClass_richcmp,       /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    RRClass_methods,                    /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)RRClass_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+RRClass_init(s_RRClass* self, PyObject* args)
+{
+    const char* s;
+    unsigned int i;
+    PyObject* bytes = NULL;
+    // The constructor argument can be a string ("IN"), an integer (1),
+    // or a sequence of numbers between 0 and 255 (wire code)
+
+    // Note that PyArg_ParseType can set PyError, and we need to clear
+    // that if we try several like here. Otherwise the *next* python
+    // call will suddenly appear to throw an exception.
+    // (the way to do exceptions is to set PyErr and return -1)
+    try {
+        if (PyArg_ParseTuple(args, "s", &s)) {
+            self->rrclass = new RRClass(s);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "I", &i)) {
+            PyErr_Clear();
+            if (i > 65535) {
+                PyErr_SetString(po_InvalidRRClass, "Class number too high");
+                return -1;
+            }
+            self->rrclass = new RRClass(i);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+            uint8_t data[2];
+            int result = readDataFromSequence(data, 2, bytes);
+            if (result != 0) {
+                return result;
+            }
+            InputBuffer ib(data, 2);
+            self->rrclass = new RRClass(ib);
+            PyErr_Clear();
+            return 0;
+        }
+    } catch (IncompleteRRClass icc) {
+        // Ok so one of our functions has thrown a C++ exception.
+        // We need to translate that to a Python Exception
+        // First clear any existing error that was set
+        PyErr_Clear();
+        // Now set our own exception
+        PyErr_SetString(po_InvalidRRClass, icc.what());
+        // And return negative
+        return -1;
+    } catch (InvalidRRClass ic) {
+        PyErr_Clear();
+        PyErr_SetString(po_InvalidRRClass, ic.what());
+        return -1;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "no valid type in constructor argument");
+    return -1;
+}
+
+static void
+RRClass_destroy(s_RRClass* self)
+{
+    if (self->rrclass != NULL)
+        delete self->rrclass;
+    self->rrclass = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+RRClass_toText(s_RRClass* self)
+{
+    // Py_BuildValue makes python objects from native data
+    return Py_BuildValue("s", self->rrclass->toText().c_str());
+}
+
+static PyObject*
+RRClass_str(PyObject* self)
+{
+    // Simply call the to_text method we already defined
+    return PyObject_CallMethod(self, (char*)"to_text", (char*)"");
+}
+
+static PyObject*
+RRClass_toWire(s_RRClass* self, PyObject* args)
+{
+    PyObject* bytes;
+    s_MessageRenderer* mr;
+    
+    if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+        PyObject* bytes_o = bytes;
+        
+        OutputBuffer buffer(2);
+        self->rrclass->toWire(buffer);
+        PyObject* n = PyBytes_FromStringAndSize((const char*) buffer.getData(), buffer.getLength());
+        PyObject* result = PySequence_InPlaceConcat(bytes_o, n);
+        // We need to release the object we temporarily created here
+        // to prevent memory leak
+        Py_DECREF(n);
+        return result;
+    } else if (PyArg_ParseTuple(args, "O!", &messagerenderer_type, (PyObject**) &mr)) {
+        self->rrclass->toWire(*mr->messagerenderer);
+        // If we return NULL it is seen as an error, so use this for
+        // None returns
+        Py_RETURN_NONE;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "toWire argument must be a sequence object or a MessageRenderer");
+    return NULL;
+}
+
+static PyObject*
+RRClass_getCode(s_RRClass* self)
+{
+    return Py_BuildValue("I", self->rrclass->getCode());
+}
+
+static PyObject* 
+RRClass_richcmp(s_RRClass* self, s_RRClass* other, int op)
+{
+    bool c;
+
+    switch (op) {
+    case Py_LT:
+        c = *self->rrclass < *other->rrclass;
+        break;
+    case Py_LE:
+        c = *self->rrclass < *other->rrclass ||
+            *self->rrclass == *other->rrclass;
+        break;
+    case Py_EQ:
+        c = self->rrclass->equals(*other->rrclass);
+        break;
+    case Py_NE:
+        c = self->rrclass->nequals(*other->rrclass);
+        break;
+    case Py_GT:
+        c = *other->rrclass < *self->rrclass;
+        break;
+    case Py_GE:
+        c = *other->rrclass < *self->rrclass ||
+            *self->rrclass == *other->rrclass;
+        break;
+    default:
+        assert(0);              // XXX: should trigger an exception
+    }
+    if (c)
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+// end of RRClass
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_RRClass(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_InvalidRRClass = PyErr_NewException("libdns_python.InvalidRRClass", NULL, NULL);
+    Py_INCREF(po_InvalidRRClass);
+    PyModule_AddObject(mod, "InvalidRRClass", po_InvalidRRClass);
+    po_IncompleteRRClass = PyErr_NewException("libdns_python.IncompleteRRClass", NULL, NULL);
+    Py_INCREF(po_IncompleteRRClass);
+    PyModule_AddObject(mod, "IncompleteRRClass", po_IncompleteRRClass);
+
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module. This is not just a check! (leaving
+    // this out results in segmentation faults)
+    if (PyType_Ready(&rrclass_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&rrclass_type);
+    PyModule_AddObject(mod, "RRClass",
+                       (PyObject*) &rrclass_type);
+    
+    return true;
+}

src/lib/dns/python/rrset_python.cc

@@ -0,0 +1,363 @@
+// Copyright (C) 2009  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/rrset.h>
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the module init at the
+// end
+//
+static PyObject* po_EmptyRRset;
+
+// This one's for our 'general' exception
+// TODO: does this need an according general class?
+// should we replace it with some more direct base exception?
+
+//
+// Declaration of enums
+// Initialization and addition of these go in the module init at the
+// end
+//
+
+//
+// Declaration of class constants
+// Initialization and addition of these go in the module init at the
+// end
+//
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+using namespace isc::dns;
+
+// RRset
+typedef struct {
+    PyObject_HEAD
+    RRset* rrset;
+} s_RRset;
+
+static int RRset_init(s_RRset* self, PyObject* args);
+static void RRset_destroy(s_RRset* self);
+
+static PyObject* RRset_getRdataCount(s_RRset* self);
+static PyObject* RRset_getName(s_RRset* self);
+static PyObject* RRset_getClass(s_RRset* self);
+static PyObject* RRset_getType(s_RRset* self);
+static PyObject* RRset_getTTL(s_RRset* self);
+static PyObject* RRset_setName(s_RRset* self, PyObject* args);
+static PyObject* RRset_setTTL(s_RRset* self, PyObject* args);
+static PyObject* RRset_toText(s_RRset* self);
+static PyObject* RRset_toWire(s_RRset* self, PyObject* args);
+static PyObject* RRset_addRdata(s_RRset* self, PyObject* args);
+// TODO: iterator
+
+static PyMethodDef RRset_methods[] = {
+    { "get_rdata_count", (PyCFunction)RRset_getRdataCount, METH_NOARGS, "Return the number of rdata fields" },
+    { "get_name", (PyCFunction)RRset_getName, METH_NOARGS, "Return" },
+    { "get_class", (PyCFunction)RRset_getClass, METH_NOARGS, "Return" },
+    { "get_type", (PyCFunction)RRset_getType, METH_NOARGS, "Return" },
+    { "get_ttl", (PyCFunction)RRset_getTTL, METH_NOARGS, "Return" },
+    { "set_name", (PyCFunction)RRset_setName, METH_VARARGS, "Return" },
+    { "set_ttl", (PyCFunction)RRset_setTTL, METH_VARARGS, "Return" },
+    { "to_text", (PyCFunction)RRset_toText, METH_NOARGS, "Return" },
+    { "to_wire", (PyCFunction)RRset_toWire, METH_VARARGS, "Return" },
+    { "add_rdata", (PyCFunction)RRset_addRdata, METH_VARARGS, "Return" },
+    { NULL, NULL, 0, NULL }
+};
+
+static PyTypeObject rrset_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.RRset",
+    sizeof(s_RRset),                       /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)RRset_destroy,   /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    NULL,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ Name Object",  /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    NULL,                               /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    RRset_methods,                       /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)RRset_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+RRset_init(s_RRset* self UNUSED_PARAM, PyObject* args UNUSED_PARAM)
+{
+    s_Name* name;
+    s_RRClass* rrclass;
+    s_RRType* rrtype;
+    s_RRTTL* rrttl;
+
+    if (PyArg_ParseTuple(args, "O!O!O!O!", &name_type, &name,
+                                           &rrclass_type, &rrclass,
+                                           &rrtype_type, &rrtype,
+                                           &rrttl_type, &rrttl
+       )) {
+        self->rrset = new RRset(*name->name, *rrclass->rrclass,
+                                *rrtype->rrtype, *rrttl->rrttl);
+        return 0;
+    }
+
+    self->rrset = NULL;
+    return -1;
+}
+
+static void
+RRset_destroy(s_RRset* self)
+{
+    if (self->rrset != NULL)
+        delete self->rrset;
+    self->rrset = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+RRset_getRdataCount(s_RRset* self)
+{
+    return Py_BuildValue("I", self->rrset->getRdataCount());
+}
+
+static PyObject*
+RRset_getName(s_RRset* self)
+{
+    s_Name* name;
+
+    // is this the best way to do this?
+    name = (s_Name*)name_type.tp_alloc(&name_type, 0);
+    if (name != NULL) {
+        name->name = new Name(self->rrset->getName());
+        if (name->name == NULL)
+          {
+            Py_DECREF(name);
+            return NULL;
+          }
+    }
+
+    return (PyObject*)name;
+}
+
+static PyObject*
+RRset_getClass(s_RRset* self)
+{
+    s_RRClass* rrclass;
+
+    rrclass = (s_RRClass*)rrclass_type.tp_alloc(&rrclass_type, 0);
+    if (rrclass != NULL) {
+        rrclass->rrclass = new RRClass(self->rrset->getClass());
+        if (rrclass->rrclass == NULL)
+          {
+            Py_DECREF(rrclass);
+            return NULL;
+          }
+    }
+
+    return (PyObject*)rrclass;
+}
+
+static PyObject*
+RRset_getType(s_RRset* self)
+{
+    s_RRType* rrtype;
+
+    rrtype = (s_RRType*)rrtype_type.tp_alloc(&rrtype_type, 0);
+    if (rrtype != NULL) {
+        rrtype->rrtype = new RRType(self->rrset->getType());
+        if (rrtype->rrtype == NULL)
+          {
+            Py_DECREF(rrtype);
+            return NULL;
+          }
+    }
+
+    return (PyObject*)rrtype;
+}
+
+static PyObject*
+RRset_getTTL(s_RRset* self)
+{
+    s_RRTTL* rrttl;
+
+    rrttl = (s_RRTTL*)rrttl_type.tp_alloc(&rrttl_type, 0);
+    if (rrttl != NULL) {
+        rrttl->rrttl = new RRTTL(self->rrset->getTTL());
+        if (rrttl->rrttl == NULL)
+          {
+            Py_DECREF(rrttl);
+            return NULL;
+          }
+    }
+
+    return (PyObject*)rrttl;
+}
+
+static PyObject*
+RRset_setName(s_RRset* self, PyObject* args)
+{
+    s_Name* name;
+    if (!PyArg_ParseTuple(args, "O!", &name_type, &name)) {
+        return NULL;
+    }
+    self->rrset->setName(*name->name);
+    Py_RETURN_NONE;
+}
+
+static PyObject*
+RRset_setTTL(s_RRset* self, PyObject* args)
+{
+    s_RRTTL* rrttl;
+    if (!PyArg_ParseTuple(args, "O!", &rrttl_type, &rrttl)) {
+        return NULL;
+    }
+    self->rrset->setTTL(*rrttl->rrttl);
+    Py_RETURN_NONE;
+}
+
+static PyObject*
+RRset_toText(s_RRset* self)
+{
+    try {
+        return Py_BuildValue("s", self->rrset->toText().c_str());
+    } catch (EmptyRRset ers) {
+        PyErr_SetString(po_EmptyRRset, ers.what());
+        return NULL;
+    }
+}
+
+static PyObject*
+RRset_toWire(s_RRset* self, PyObject* args)
+{
+    PyObject* bytes;
+    s_MessageRenderer* mr;
+
+    try {
+        if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+            PyObject* bytes_o = bytes;
+            
+            OutputBuffer buffer(4096);
+            self->rrset->toWire(buffer);
+            PyObject* n = PyBytes_FromStringAndSize((const char*) buffer.getData(), buffer.getLength());
+            PyObject* result = PySequence_InPlaceConcat(bytes_o, n);
+            // We need to release the object we temporarily created here
+            // to prevent memory leak
+            Py_DECREF(n);
+            return result;
+        } else if (PyArg_ParseTuple(args, "O!", &messagerenderer_type, (PyObject**) &mr)) {
+            self->rrset->toWire(*mr->messagerenderer);
+            // If we return NULL it is seen as an error, so use this for
+            // None returns
+            Py_RETURN_NONE;
+        }
+    } catch (EmptyRRset ers) {
+        PyErr_Clear();
+        PyErr_SetString(po_EmptyRRset, ers.what());
+        return NULL;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "toWire argument must be a sequence object or a MessageRenderer");
+    return NULL;
+}
+
+static PyObject*
+RRset_addRdata(s_RRset* self, PyObject* args)
+{
+    s_Rdata* rdata;
+    if (!PyArg_ParseTuple(args, "O!", &rdata_type, &rdata)) {
+        return NULL;
+    }
+    try {
+        self->rrset->addRdata(*rdata->rdata);
+        Py_RETURN_NONE;
+    } catch (std::bad_cast) {
+        PyErr_Clear();
+        PyErr_SetString(PyExc_TypeError,
+                        "Rdata type to add must match type of RRset");
+        return NULL;
+    }
+}
+// end of RRset
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_RRset(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_EmptyRRset = PyErr_NewException("libdns_python.EmptyRRset", NULL, NULL);
+    Py_INCREF(po_EmptyRRset);
+    PyModule_AddObject(mod, "EmptyRRset", po_EmptyRRset);
+
+    // Add the enums to the module
+
+    // Add the constants to the module
+
+    // Add the classes to the module
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module
+
+    // NameComparisonResult
+    if (PyType_Ready(&rrset_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&rrset_type);
+    PyModule_AddObject(mod, "RRset",
+                       (PyObject*) &rrset_type);
+    
+    return true;
+}
+

src/lib/dns/python/rrttl_python.cc

@@ -0,0 +1,302 @@
+// Copyright (C) 2009  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/rrttl.h>
+using namespace isc::dns;
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the initModulePart
+// function at the end of this file
+//
+static PyObject* po_InvalidRRTTL;
+static PyObject* po_IncompleteRRTTL;
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+
+//
+// RRTTL
+//
+
+// The s_* Class simply coverst one instantiation of the object
+typedef struct {
+    PyObject_HEAD
+    RRTTL* rrttl;
+} s_RRTTL;
+
+//
+// We declare the functions here, the definitions are below
+// the type definition of the object, since both can use the other
+//
+
+// General creation and destruction
+static int RRTTL_init(s_RRTTL* self, PyObject* args);
+static void RRTTL_destroy(s_RRTTL* self);
+
+// These are the functions we export
+static PyObject* RRTTL_toText(s_RRTTL* self);
+// This is a second version of toText, we need one where the argument
+// is a PyObject*, for the str() function in python.
+static PyObject* RRTTL_str(PyObject* self);
+static PyObject* RRTTL_toWire(s_RRTTL* self, PyObject* args);
+static PyObject* RRTTL_getValue(s_RRTTL* self);
+static PyObject* RRTTL_richcmp(s_RRTTL* self, s_RRTTL* other, int op);
+
+// This list contains the actual set of functions we have in
+// python. Each entry has
+// 1. Python method name
+// 2. Our static function here
+// 3. Argument type
+// 4. Documentation
+static PyMethodDef RRTTL_methods[] = {
+    { "to_text", (PyCFunction)RRTTL_toText, METH_NOARGS, "Return the string representation" },
+    { "to_wire", (PyCFunction)RRTTL_toWire, METH_VARARGS, "to wire format" },
+    { "get_value", (PyCFunction)RRTTL_getValue, METH_NOARGS, "Return the TTL as an integer" },
+    { NULL, NULL, 0, NULL }
+};
+
+// This defines the complete type for reflection in python and
+// parsing of PyObject* to s_RRTTL
+// Most of the functions are not actually implemented and NULL here.
+static PyTypeObject rrttl_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.RRTTL",
+    sizeof(s_RRTTL),                  /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)RRTTL_destroy,        /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    RRTTL_str,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ RRTTL Object",               /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    (richcmpfunc)RRTTL_richcmp,       /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    RRTTL_methods,                    /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)RRTTL_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+RRTTL_init(s_RRTTL* self, PyObject* args)
+{
+    const char* s;
+    unsigned long i;
+    PyObject* bytes = NULL;
+    // The constructor argument can be a string ("IN"), an integer (1),
+    // or a sequence of numbers between 0 and 255 (wire code)
+
+    // Note that PyArg_ParseType can set PyError, and we need to clear
+    // that if we try several like here. Otherwise the *next* python
+    // call will suddenly appear to throw an exception.
+    // (the way to do exceptions is to set PyErr and return -1)
+    try {
+        if (PyArg_ParseTuple(args, "s", &s)) {
+            self->rrttl = new RRTTL(s);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "I", &i)) {
+            PyErr_Clear();
+            self->rrttl = new RRTTL(i);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+            uint8_t data[2];
+            int result = readDataFromSequence(data, 2, bytes);
+            if (result != 0) {
+                return result;
+            }
+            InputBuffer ib(data, 2);
+            self->rrttl = new RRTTL(ib);
+            PyErr_Clear();
+            return 0;
+        }
+    } catch (IncompleteRRTTL icc) {
+        // Ok so one of our functions has thrown a C++ exception.
+        // We need to translate that to a Python Exception
+        // First clear any existing error that was set
+        PyErr_Clear();
+        // Now set our own exception
+        PyErr_SetString(po_InvalidRRTTL, icc.what());
+        // And return negative
+        return -1;
+    } catch (InvalidRRTTL ic) {
+        PyErr_Clear();
+        PyErr_SetString(po_InvalidRRTTL, ic.what());
+        return -1;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "no valid type in constructor argument");
+    return -1;
+}
+
+static void
+RRTTL_destroy(s_RRTTL* self)
+{
+    if (self->rrttl != NULL)
+        delete self->rrttl;
+    self->rrttl = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+RRTTL_toText(s_RRTTL* self)
+{
+    // Py_BuildValue makes python objects from native data
+    return Py_BuildValue("s", self->rrttl->toText().c_str());
+}
+
+static PyObject*
+RRTTL_str(PyObject* self)
+{
+    // Simply call the to_text method we already defined
+    return PyObject_CallMethod(self, (char*)"to_text", (char*)"");
+}
+
+static PyObject*
+RRTTL_toWire(s_RRTTL* self, PyObject* args)
+{
+    PyObject* bytes;
+    s_MessageRenderer* mr;
+    
+    if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+        PyObject* bytes_o = bytes;
+        
+        OutputBuffer buffer(2);
+        self->rrttl->toWire(buffer);
+        PyObject* n = PyBytes_FromStringAndSize((const char*) buffer.getData(), buffer.getLength());
+        PyObject* result = PySequence_InPlaceConcat(bytes_o, n);
+        // We need to release the object we temporarily created here
+        // to prevent memory leak
+        Py_DECREF(n);
+        return result;
+    } else if (PyArg_ParseTuple(args, "O!", &messagerenderer_type, (PyObject**) &mr)) {
+        self->rrttl->toWire(*mr->messagerenderer);
+        // If we return NULL it is seen as an error, so use this for
+        // None returns
+        Py_RETURN_NONE;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "toWire argument must be a sequence object or a MessageRenderer");
+    return NULL;
+}
+
+static PyObject*
+RRTTL_getValue(s_RRTTL* self)
+{
+    return Py_BuildValue("I", self->rrttl->getValue());
+}
+
+static PyObject* 
+RRTTL_richcmp(s_RRTTL* self, s_RRTTL* other, int op)
+{
+    bool c;
+
+    switch (op) {
+    case Py_LT:
+        c = *self->rrttl < *other->rrttl;
+        break;
+    case Py_LE:
+        c = *self->rrttl < *other->rrttl ||
+            *self->rrttl == *other->rrttl;
+        break;
+    case Py_EQ:
+        c = self->rrttl->equals(*other->rrttl);
+        break;
+    case Py_NE:
+        c = self->rrttl->nequals(*other->rrttl);
+        break;
+    case Py_GT:
+        c = *other->rrttl < *self->rrttl;
+        break;
+    case Py_GE:
+        c = *other->rrttl < *self->rrttl ||
+            *self->rrttl == *other->rrttl;
+        break;
+    default:
+        assert(0);              // XXX: should trigger an exception
+    }
+    if (c)
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+// end of RRTTL
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_RRTTL(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_InvalidRRTTL = PyErr_NewException("libdns_python.InvalidRRTTL", NULL, NULL);
+    Py_INCREF(po_InvalidRRTTL);
+    PyModule_AddObject(mod, "InvalidRRTTL", po_InvalidRRTTL);
+    po_IncompleteRRTTL = PyErr_NewException("libdns_python.IncompleteRRTTL", NULL, NULL);
+    Py_INCREF(po_IncompleteRRTTL);
+    PyModule_AddObject(mod, "IncompleteRRTTL", po_IncompleteRRTTL);
+
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module. This is not just a check! (leaving
+    // this out results in segmentation faults)
+    if (PyType_Ready(&rrttl_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&rrttl_type);
+    PyModule_AddObject(mod, "RRTTL",
+                       (PyObject*) &rrttl_type);
+    
+    return true;
+}

src/lib/dns/python/rrtype_python.cc

@@ -0,0 +1,307 @@
+// Copyright (C) 2009  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/rrtype.h>
+using namespace isc::dns;
+
+//
+// Declaration of the custom exceptions
+// Initialization and addition of these go in the initModulePart
+// function at the end of this file
+//
+static PyObject* po_InvalidRRType;
+static PyObject* po_IncompleteRRType;
+
+//
+// Definition of the classes
+//
+
+// For each class, we need a struct, a helper functions (init, destroy,
+// and static wrappers around the methods we export), a list of methods,
+// and a type description
+
+//
+// RRType
+//
+
+// The s_* Class simply coverst one instantiation of the object
+typedef struct {
+    PyObject_HEAD
+    RRType* rrtype;
+} s_RRType;
+
+//
+// We declare the functions here, the definitions are below
+// the type definition of the object, since both can use the other
+//
+
+// General creation and destruction
+static int RRType_init(s_RRType* self, PyObject* args);
+static void RRType_destroy(s_RRType* self);
+
+// These are the functions we export
+static PyObject* RRType_toText(s_RRType* self);
+// This is a second version of toText, we need one where the argument
+// is a PyObject*, for the str() function in python.
+static PyObject* RRType_str(PyObject* self);
+static PyObject* RRType_toWire(s_RRType* self, PyObject* args);
+static PyObject* RRType_getCode(s_RRType* self);
+static PyObject* RRType_richcmp(s_RRType* self, s_RRType* other, int op);
+//TODO: do we also want specific equals? (and perhaps not even richcmp?)
+
+// This list contains the actual set of functions we have in
+// python. Each entry has
+// 1. Python method name
+// 2. Our static function here
+// 3. Argument type
+// 4. Documentation
+static PyMethodDef RRType_methods[] = {
+    { "to_text", (PyCFunction)RRType_toText, METH_NOARGS, "Return the string representation" },
+    { "to_wire", (PyCFunction)RRType_toWire, METH_VARARGS, "to wire format" },
+    { "get_code", (PyCFunction)RRType_getCode, METH_NOARGS, "Return the class code as an integer" },
+    { NULL, NULL, 0, NULL }
+};
+
+// This defines the complete type for reflection in python and
+// parsing of PyObject* to s_RRType
+// Most of the functions are not actually implemented and NULL here.
+static PyTypeObject rrtype_type = {
+    PyVarObject_HEAD_INIT(NULL, 0)
+    "libdns_python.RRType",
+    sizeof(s_RRType),                  /* tp_basicsize */
+    0,                                  /* tp_itemsize */
+    (destructor)RRType_destroy,        /* tp_dealloc */
+    NULL,                               /* tp_print */
+    NULL,                               /* tp_getattr */
+    NULL,                               /* tp_setattr */
+    NULL,                               /* tp_reserved */
+    NULL,                               /* tp_repr */
+    NULL,                               /* tp_as_number */
+    NULL,                               /* tp_as_sequence */
+    NULL,                               /* tp_as_mapping */
+    NULL,                               /* tp_hash  */
+    NULL,                               /* tp_call */
+    RRType_str,                               /* tp_str */
+    NULL,                               /* tp_getattro */
+    NULL,                               /* tp_setattro */
+    NULL,                               /* tp_as_buffer */
+    Py_TPFLAGS_DEFAULT,                 /* tp_flags */
+    "C++ RRType Object",               /* tp_doc */
+    NULL,                               /* tp_traverse */
+    NULL,                               /* tp_clear */
+    (richcmpfunc)RRType_richcmp,       /* tp_richcompare */
+    0,                                  /* tp_weaklistoffset */
+    NULL,                               /* tp_iter */
+    NULL,                               /* tp_iternext */
+    RRType_methods,                    /* tp_methods */
+    NULL,                               /* tp_members */
+    NULL,                               /* tp_getset */
+    NULL,                               /* tp_base */
+    NULL,                               /* tp_dict */
+    NULL,                               /* tp_descr_get */
+    NULL,                               /* tp_descr_set */
+    0,                                  /* tp_dictoffset */
+    (initproc)RRType_init,                /* tp_init */
+    NULL,                               /* tp_alloc */
+    PyType_GenericNew,                  /* tp_new */
+    NULL,                               /* tp_free */
+    NULL,                               /* tp_is_gc */
+    NULL,                               /* tp_bases */
+    NULL,                               /* tp_mro */
+    NULL,                               /* tp_cache */
+    NULL,                               /* tp_subclasses */
+    NULL,                               /* tp_weaklist */
+    // Note: not sure if the following are correct.  Added them just to
+    // make the compiler happy.
+    NULL,                               /* tp_del */
+    0                                   /* tp_version_tag */
+};
+
+static int
+RRType_init(s_RRType* self, PyObject* args)
+{
+    const char* s;
+    unsigned int i;
+    PyObject* bytes = NULL;
+    // The constructor argument can be a string ("IN"), an integer (1),
+    // or a sequence of numbers between 0 and 255 (wire code)
+
+    // Note that PyArg_ParseType can set PyError, and we need to clear
+    // that if we try several like here. Otherwise the *next* python
+    // call will suddenly appear to throw an exception.
+    // (the way to do exceptions is to set PyErr and return -1)
+    try {
+        if (PyArg_ParseTuple(args, "s", &s)) {
+            self->rrtype = new RRType(s);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "I", &i)) {
+            PyErr_Clear();
+            if (i > 65535) {
+                PyErr_SetString(po_InvalidRRType, "Class number too high");
+                return -1;
+            }
+            self->rrtype = new RRType(i);
+            return 0;
+        } else if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+            uint8_t data[2];
+            int result = readDataFromSequence(data, 2, bytes);
+            if (result != 0) {
+                return result;
+            }
+            InputBuffer ib(data, 2);
+            self->rrtype = new RRType(ib);
+            PyErr_Clear();
+            return 0;
+        }
+    } catch (IncompleteRRType icc) {
+        // Ok so one of our functions has thrown a C++ exception.
+        // We need to translate that to a Python Exception
+        // First clear any existing error that was set
+        PyErr_Clear();
+        // Now set our own exception
+        PyErr_SetString(po_InvalidRRType, icc.what());
+        // And return negative
+        return -1;
+    } catch (InvalidRRType ic) {
+        PyErr_Clear();
+        PyErr_SetString(po_InvalidRRType, ic.what());
+        return -1;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "no valid type in constructor argument");
+    return -1;
+}
+
+static void
+RRType_destroy(s_RRType* self)
+{
+    if (self->rrtype != NULL)
+        delete self->rrtype;
+    self->rrtype = NULL;
+    Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject*
+RRType_toText(s_RRType* self)
+{
+    // Py_BuildValue makes python objects from native data
+    return Py_BuildValue("s", self->rrtype->toText().c_str());
+}
+
+static PyObject*
+RRType_str(PyObject* self)
+{
+    // Simply call the to_text method we already defined
+    return PyObject_CallMethod(self, (char*)"to_text", (char*)"");
+}
+
+static PyObject*
+RRType_toWire(s_RRType* self, PyObject* args)
+{
+    PyObject* bytes;
+    s_MessageRenderer* mr;
+    
+    if (PyArg_ParseTuple(args, "O", &bytes) && PySequence_Check(bytes)) {
+        PyObject* bytes_o = bytes;
+        
+        OutputBuffer buffer(2);
+        self->rrtype->toWire(buffer);
+        PyObject* n = PyBytes_FromStringAndSize((const char*) buffer.getData(), buffer.getLength());
+        PyObject* result = PySequence_InPlaceConcat(bytes_o, n);
+        // We need to release the object we temporarily created here
+        // to prevent memory leak
+        Py_DECREF(n);
+        return result;
+    } else if (PyArg_ParseTuple(args, "O!", &messagerenderer_type, (PyObject**) &mr)) {
+        self->rrtype->toWire(*mr->messagerenderer);
+        // If we return NULL it is seen as an error, so use this for
+        // None returns
+        Py_RETURN_NONE;
+    }
+    PyErr_Clear();
+    PyErr_SetString(PyExc_TypeError,
+                    "toWire argument must be a sequence object or a MessageRenderer");
+    return NULL;
+}
+
+static PyObject*
+RRType_getCode(s_RRType* self)
+{
+    return Py_BuildValue("I", self->rrtype->getCode());
+}
+
+static PyObject* 
+RRType_richcmp(s_RRType* self, s_RRType* other, int op)
+{
+    bool c;
+
+    switch (op) {
+    case Py_LT:
+        c = *self->rrtype < *other->rrtype;
+        break;
+    case Py_LE:
+        c = *self->rrtype < *other->rrtype ||
+            *self->rrtype == *other->rrtype;
+        break;
+    case Py_EQ:
+        c = self->rrtype->equals(*other->rrtype);
+        break;
+    case Py_NE:
+        c = self->rrtype->nequals(*other->rrtype);
+        break;
+    case Py_GT:
+        c = *other->rrtype < *self->rrtype;
+        break;
+    case Py_GE:
+        c = *other->rrtype < *self->rrtype ||
+            *self->rrtype == *other->rrtype;
+        break;
+    default:
+        assert(0);              // XXX: should trigger an exception
+    }
+    if (c)
+        Py_RETURN_TRUE;
+    else
+        Py_RETURN_FALSE;
+}
+// end of RRType
+
+
+// Module Initialization, all statics are initialized here
+bool
+initModulePart_RRType(PyObject* mod)
+{
+    // Add the exceptions to the module
+    po_InvalidRRType = PyErr_NewException("libdns_python.InvalidRRType", NULL, NULL);
+    Py_INCREF(po_InvalidRRType);
+    PyModule_AddObject(mod, "InvalidRRType", po_InvalidRRType);
+    po_IncompleteRRType = PyErr_NewException("libdns_python.IncompleteRRType", NULL, NULL);
+    Py_INCREF(po_IncompleteRRType);
+    PyModule_AddObject(mod, "IncompleteRRType", po_IncompleteRRType);
+
+    // We initialize the static description object with PyType_Ready(),
+    // then add it to the module. This is not just a check! (leaving
+    // this out results in segmentation faults)
+    if (PyType_Ready(&rrtype_type) < 0) {
+        return false;
+    }
+    Py_INCREF(&rrtype_type);
+    PyModule_AddObject(mod, "RRType",
+                       (PyObject*) &rrtype_type);
+    
+    return true;
+}

src/lib/dns/python/tests/libdns_python_test.in

@@ -0,0 +1,14 @@
+#! /bin/sh
+
+PYTHON_EXEC=${PYTHON_EXEC:-@PYTHON@}
+export PYTHON_EXEC
+
+CONFIG_PATH=@abs_top_srcdir@/src/lib/dns/python/tests
+
+PYTHONPATH=@abs_top_srcdir@/src/lib/python:@abs_top_srcdir@/src/lib/dns/python/.libs
+export PYTHONPATH
+
+cd ${BIND10_PATH}
+${PYTHON_EXEC} -O ${CONFIG_PATH}/rrtype_python_test.py $*
+
+${PYTHON_EXEC} -O ${CONFIG_PATH}/rrset_python_test.py $*

src/lib/dns/python/tests/rrset_python_test.py

@@ -0,0 +1,97 @@
+# Copyright (C) 2009  Internet Systems Consortium.
+#
+# Permission to use, copy, modify, and 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 INTERNET SYSTEMS CONSORTIUM
+# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# INTERNET SYSTEMS CONSORTIUM 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.
+
+#
+# Tests for the rrtype part of the libdns_python module
+#
+
+import unittest
+import os
+from libdns_python import *
+
+class TestModuleSpec(unittest.TestCase):
+    
+    def setUp(self):
+        self.test_name = Name("test.example.com")
+        self.test_domain = Name("example.com")
+        self.test_nsname = Name("ns.example.com")
+        self.rrset_a = RRset(self.test_name, RRClass("IN"), RRType("A"), RRTTL(3600))
+        self.rrset_a_empty = RRset(self.test_name, RRClass("IN"), RRType("A"), RRTTL(3600))
+        self.rrset_ns = RRset(self.test_domain, RRClass("IN"), RRType("NS"), RRTTL(86400))
+        self.rrset_ch_txt = RRset(self.test_domain, RRClass("CH"), RRType("TXT"), RRTTL(0))
+        self.MAX_RDATA_COUNT = 100
+        self.rrset_a.add_rdata(Rdata(RRType("A"), RRClass("IN"), "192.0.2.1"));
+        self.rrset_a.add_rdata(Rdata(RRType("A"), RRClass("IN"), "192.0.2.2"));
+
+    def test_get_rdata_count(self):
+        for i in range(0, self.MAX_RDATA_COUNT):
+            self.assertEqual(i, self.rrset_a_empty.get_rdata_count())
+            self.rrset_a_empty.add_rdata(Rdata(RRType("A"), RRClass("IN"), "192.0.2.1"))
+
+    def test_get_name(self):
+        self.assertEqual(self.test_name, self.rrset_a.get_name())
+        self.assertEqual(self.test_domain, self.rrset_ns.get_name())
+
+    def test_get_class(self):
+        self.assertEqual(RRClass("IN"), self.rrset_a.get_class());
+        self.assertEqual(RRClass("CH"), self.rrset_ch_txt.get_class());
+
+    def test_get_type(self):
+        self.assertEqual(RRType("A"), self.rrset_a.get_type());
+        self.assertEqual(RRType("NS"), self.rrset_ns.get_type());
+        self.assertEqual(RRType("TXT"), self.rrset_ch_txt.get_type());
+
+    def test_get_ttl(self):
+        self.assertEqual(RRTTL(3600), self.rrset_a.get_ttl());
+        self.assertEqual(RRTTL(86400), self.rrset_ns.get_ttl());
+        self.assertEqual(RRTTL(0), self.rrset_ch_txt.get_ttl());
+
+    def test_set_ttl(self):
+        self.rrset_a.set_ttl(RRTTL(86400));
+        self.assertEqual(RRTTL(86400), self.rrset_a.get_ttl());
+        self.rrset_a.set_ttl(RRTTL(0));
+        self.assertEqual(RRTTL(0), self.rrset_a.get_ttl());
+
+    def test_set_name(self):
+        self.rrset_a.set_name(self.test_nsname);
+        self.assertEqual(self.test_nsname, self.rrset_a.get_name());
+
+    def test_add_rdata(self):
+        # no iterator to read out yet (TODO: add addition test once implemented)
+
+        self.assertRaises(TypeError, self.rrset_a.add_rdata, Rdata(RRType("NS"), RRClass("IN"), "test.name"))
+        pass
+
+    def test_to_text(self):
+        self.assertEqual("test.example.com. 3600 IN A 192.0.2.1\n"
+                         "test.example.com. 3600 IN A 192.0.2.2\n",
+                         self.rrset_a.to_text());
+
+    def test_to_wire_buffer(self):
+        exp_buffer = bytearray(b'\x04test\x07example\x03com\x00\x00\x01\x00\x01\x00\x00\x0e\x10\x00\x04\xc0\x00\x02\x01\x04test\x07example\x03com\x00\x00\x01\x00\x01\x00\x00\x0e\x10\x00\x04\xc0\x00\x02\x02')
+        buffer = bytearray()
+        self.rrset_a.to_wire(buffer)
+        self.assertEqual(exp_buffer, buffer)
+
+        self.assertRaises(EmptyRRset, self.rrset_a_empty.to_wire, buffer);
+
+    def test_to_wire_renderer(self):
+        exp_buffer = bytearray(b'\x04test\x07example\x03com\x00\x00\x01\x00\x01\x00\x00\x0e\x10\x00\x04\xc0\x00\x02\x01\xc0\x00\x00\x01\x00\x01\x00\x00\x0e\x10\x00\x04\xc0\x00\x02\x02')
+        mr = MessageRenderer()
+        self.rrset_a.to_wire(mr)
+        self.assertEqual(exp_buffer, mr.get_data())
+        
+if __name__ == '__main__':
+    unittest.main()

src/lib/dns/python/tests/rrtype_python_test.py

@@ -0,0 +1,89 @@
+# Copyright (C) 2009  Internet Systems Consortium.
+#
+# Permission to use, copy, modify, and 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 INTERNET SYSTEMS CONSORTIUM
+# DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
+# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
+# INTERNET SYSTEMS CONSORTIUM 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.
+
+#
+# Tests for the rrtype part of the libdns_python module
+#
+
+import unittest
+import os
+from libdns_python import *
+
+class TestModuleSpec(unittest.TestCase):
+    
+    rrtype_1 = RRType(1)
+    rrtype_0x80 = RRType(0x80);
+    rrtype_0x800 = RRType(0x800);
+    rrtype_0x8000 = RRType(0x8000);
+    rrtype_max = RRType(0xffff);
+    wiredata = bytearray(b'\x00\x01\x00\x80\x08\x00\x80\x00\xff\xff');
+
+    def test_from_text(self):
+        self.assertEqual("A", RRType("A").to_text())
+        self.assertEqual("NS", RRType("NS").to_text());
+    
+        self.assertEqual("TYPE65535", RRType("TYPE65535").to_text());
+    
+        self.assertEqual(53, RRType("TYPE00053").get_code());
+
+        self.assertRaises(InvalidRRType, RRType, "TYPE000053");
+    
+        self.assertRaises(InvalidRRType, RRType, "TYPE");
+        self.assertRaises(InvalidRRType, RRType, "TYPE-1");
+        self.assertRaises(InvalidRRType, RRType, "TYPExxx");
+        self.assertRaises(InvalidRRType, RRType, "TYPE65536");
+        self.assertRaises(InvalidRRType, RRType, "TYPE6500x");
+        self.assertRaises(InvalidRRType, RRType, "TYPE65000 ");
+
+    def test_case_construct(self):
+        self.assertEqual("A", RRType("a").to_text());
+        self.assertEqual("NS", RRType("ns").to_text());
+        self.assertEqual("TYPE65535", RRType("type65535").to_text());
+
+    def test_to_text(self):
+        self.assertEqual("A", RRType(1).to_text());
+        self.assertEqual("TYPE65000", RRType(65000).to_text());
+
+    def test_to_wire_buffer(self):
+        obuffer = bytearray()
+        self.rrtype_1.to_wire(obuffer);
+        self.rrtype_0x80.to_wire(obuffer);
+        self.rrtype_0x800.to_wire(obuffer);
+        self.rrtype_0x8000.to_wire(obuffer);
+        self.rrtype_max.to_wire(obuffer);
+
+        self.assertEqual(self.wiredata, obuffer)
+        
+    def test_to_wire_renderer(self):
+        mr = MessageRenderer()
+        self.rrtype_1.to_wire(mr);
+        self.rrtype_0x80.to_wire(mr);
+        self.rrtype_0x800.to_wire(mr);
+        self.rrtype_0x8000.to_wire(mr);
+        self.rrtype_max.to_wire(mr);
+
+        self.assertEqual(self.wiredata, mr.get_data())
+
+    def test_compare(self):
+        self.assertTrue(RRType(1) == RRType("A"));
+        #self.assertTrue(RRType(1).equals(RRType("A")));
+        self.assertTrue(RRType(0) != RRType("A"));
+        #self.assertTrue(RRType(0).nequals(RRType("A")));
+    
+        self.assertTrue(RRType("A") < RRType("NS"));
+        self.assertTrue(RRType(100) < RRType(65535));
+        
+if __name__ == '__main__':
+    unittest.main()

src/lib/dns/python/tests/test.py

@@ -0,0 +1,34 @@
+#!/usr/bin/python3.1
+
+import libdns_python
+
+#for i in range(0,3):
+#b = bytearray()
+#while True:
+#    c = libdns_python.RRClass("IN")
+#    #print(dir(b))
+#    c.toWire(b)
+#    #print("b:")
+#    print(b)
+#    #print("d:")
+#    #print(d)
+
+#m = libdns_python.MessageRenderer()
+#c1 = libdns_python.RRClass("IN")
+#c2 = libdns_python.RRClass("CH")
+#c3 = libdns_python.RRClass("IN")
+#b2 = bytearray()
+#d.toWire(b2)
+#print(b2)
+n = libdns_python.Name("tjeb.nl")
+t = libdns_python.RRType("A")
+c = libdns_python.RRClass("IN")
+ttl = libdns_python.RRTTL(1234)
+
+#set = libdns_python.RRset(1,2,3,4)
+
+set = libdns_python.RRset(n, c, t, ttl)
+#print(set.toText())
+rd = libdns_python.Rdata(t, c, "123.123.123.123")
+set.add_rdata(rd)
+print(set.to_text())

src/lib/python/isc/__init__.py

@@ -1,3 +1,4 @@
 import isc.auth
 import isc.cc
 import isc.config
+import isc.dns

src/lib/python/isc/dns/__init__.py

@@ -0,0 +1 @@
+from libdns_python_name import *

tools/import_boost.sh

@@ -30,6 +30,7 @@ boost/function
 boost/iterator
 boost/mpl
 boost/preprocessor
+boost/python
 boost/range
 boost/smart_ptr
 boost/type_traits