py3: Remove PyStr_FromString() compatability macro
[samba.git] / lib / ldb / pyldb.c
index 5010f80c7a448dfca2c3c2ccbdf06cdce35d2f02..6f43cca78ca5d6ad814025b1fdbdbbb737998cc3 100644 (file)
 
 #include <Python.h>
 #include "ldb_private.h"
+#include "ldb_handlers.h"
 #include "pyldb.h"
+#include "dlinklist.h"
+
+/* discard signature of 'func' in favour of 'target_sig' */
+#define PY_DISCARD_FUNC_SIG(target_sig, func) (target_sig)(void(*)(void))func
+
+struct py_ldb_search_iterator_reply;
+
+typedef struct {
+       PyObject_HEAD
+       TALLOC_CTX *mem_ctx;
+       PyLdbObject *ldb;
+       struct {
+               struct ldb_request *req;
+               struct py_ldb_search_iterator_reply *next;
+               struct py_ldb_search_iterator_reply *result;
+               PyObject *exception;
+       } state;
+} PyLdbSearchIteratorObject;
+
+struct py_ldb_search_iterator_reply {
+       struct py_ldb_search_iterator_reply *prev, *next;
+       PyLdbSearchIteratorObject *py_iter;
+       PyObject *obj;
+};
 
 void initldb(void);
 static PyObject *PyLdbMessage_FromMessage(struct ldb_message *msg);
@@ -38,6 +63,7 @@ static PyObject *PyExc_LdbError;
 
 static PyTypeObject PyLdbControl;
 static PyTypeObject PyLdbResult;
+static PyTypeObject PyLdbSearchIterator;
 static PyTypeObject PyLdbMessage;
 #define PyLdbMessage_Check(ob) PyObject_TypeCheck(ob, &PyLdbMessage)
 static PyTypeObject PyLdbModule;
@@ -56,16 +82,64 @@ static struct ldb_message_element *PyObject_AsMessageElement(
                                                      PyObject *set_obj,
                                                      unsigned int flags,
                                                      const char *attr_name);
+static PyTypeObject PyLdbBytesType;
 
-/* There's no Py_ssize_t in 2.4, apparently */
-#if PY_MAJOR_VERSION == 2 && PY_MINOR_VERSION < 5
-typedef int Py_ssize_t;
-typedef inquiry lenfunc;
-typedef intargfunc ssizeargfunc;
-#endif
+#if PY_MAJOR_VERSION >= 3
+#define PyStr_FromStringAndSize PyUnicode_FromStringAndSize
+#define PyStr_FromFormat PyUnicode_FromFormat
+#define PyStr_FromFormatV PyUnicode_FromFormatV
+#define PyStr_AsUTF8 PyUnicode_AsUTF8
+#define PyStr_AsUTF8AndSize PyUnicode_AsUTF8AndSize
+#define PyInt_FromLong PyLong_FromLong
+
+#define PYARG_STR_UNI "es"
+
+static PyObject *PyLdbBytes_FromStringAndSize(const char *msg, int size)
+{
+       PyObject* result = NULL;
+       PyObject* args = NULL;
+       args = Py_BuildValue("(y#)", msg, size);
+       result = PyLdbBytesType.tp_new(&PyLdbBytesType, args, NULL);
+       Py_DECREF(args);
+       return result;
+}
+#else
+#define PyStr_FromStringAndSize PyString_FromStringAndSize
+#define PyStr_FromFormat PyString_FromFormat
+#define PyStr_FromFormatV PyString_FromFormatV
+#define PyStr_AsUTF8 PyString_AsString
+#define PyLdbBytes_FromStringAndSize PyString_FromStringAndSize
+
+#define PYARG_STR_UNI "et"
 
-#define SIGN(a) (((a) == 0)?0:((a) < 0?-1:1))
+const char *PyStr_AsUTF8AndSize(PyObject *pystr, Py_ssize_t *sizeptr);
+const char *
+PyStr_AsUTF8AndSize(PyObject *pystr, Py_ssize_t *sizeptr)
+{
+       const char * ret = PyString_AsString(pystr);
+       if (ret == NULL)
+               return NULL;
+       *sizeptr = PyString_Size(pystr);
+       return ret;
+}
+#endif
 
+static PyObject *richcmp(int cmp_val, int op)
+{
+       int ret;
+       switch (op) {
+               case Py_LT: ret = cmp_val < 0;  break;
+               case Py_LE: ret = cmp_val <= 0; break;
+               case Py_EQ: ret = cmp_val == 0; break;
+               case Py_NE: ret = cmp_val != 0; break;
+               case Py_GT: ret = cmp_val > 0;  break;
+               case Py_GE: ret = cmp_val >= 0; break;
+               default:
+                       Py_INCREF(Py_NotImplemented);
+                       return Py_NotImplemented;
+       }
+       return PyBool_FromLong(ret);
+}
 
 
 static PyObject *py_ldb_control_str(PyLdbControlObject *self)
@@ -76,9 +150,9 @@ static PyObject *py_ldb_control_str(PyLdbControlObject *self)
                        PyErr_NoMemory();
                        return NULL;
                }
-               return PyString_FromString(control);
+               return PyUnicode_FromString(control);
        } else {
-               return PyString_FromFormat("ldb control");
+               return PyUnicode_FromString("ldb control");
        }
 }
 
@@ -91,17 +165,42 @@ static void py_ldb_control_dealloc(PyLdbControlObject *self)
        Py_TYPE(self)->tp_free(self);
 }
 
-static PyObject *py_ldb_control_get_oid(PyLdbControlObject *self)
+/* Create a text (rather than bytes) interface for a LDB result object */
+static PyObject *wrap_text(const char *type, PyObject *wrapped)
 {
-       return PyString_FromString(self->data->oid);
+       PyObject *mod, *cls, *constructor, *inst;
+       mod = PyImport_ImportModule("_ldb_text");
+       if (mod == NULL)
+               return NULL;
+       cls = PyObject_GetAttrString(mod, type);
+       Py_DECREF(mod);
+       if (cls == NULL) {
+               Py_DECREF(mod);
+               return NULL;
+       }
+       constructor = PyObject_GetAttrString(cls, "_wrap");
+       Py_DECREF(cls);
+       if (constructor == NULL) {
+               return NULL;
+       }
+       inst = PyObject_CallFunction(constructor, discard_const_p(char, "O"), wrapped);
+       Py_DECREF(constructor);
+       return inst;
+}
+
+static PyObject *py_ldb_control_get_oid(PyLdbControlObject *self,
+               PyObject *Py_UNUSED(ignored))
+{
+       return PyUnicode_FromString(self->data->oid);
 }
 
-static PyObject *py_ldb_control_get_critical(PyLdbControlObject *self)
+static PyObject *py_ldb_control_get_critical(PyLdbControlObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        return PyBool_FromLong(self->data->critical);
 }
 
-static PyObject *py_ldb_control_set_critical(PyLdbControlObject *self, PyObject *value, void *closure)
+static int py_ldb_control_set_critical(PyLdbControlObject *self, PyObject *value, void *closure)
 {
        if (PyObject_IsTrue(value)) {
                self->data->critical = true;
@@ -162,9 +261,16 @@ static PyObject *py_ldb_control_new(PyTypeObject *type, PyObject *args, PyObject
 }
 
 static PyGetSetDef py_ldb_control_getset[] = {
-       { discard_const_p(char, "oid"), (getter)py_ldb_control_get_oid, NULL, NULL },
-       { discard_const_p(char, "critical"), (getter)py_ldb_control_get_critical, (setter)py_ldb_control_set_critical, NULL },
-       { NULL }
+       {
+               .name = discard_const_p(char, "oid"),
+               .get  = (getter)py_ldb_control_get_oid,
+       },
+       {
+               .name = discard_const_p(char, "critical"),
+               .get  = (getter)py_ldb_control_get_critical,
+               .set  = (setter)py_ldb_control_set_critical,
+       },
+       { .name = NULL },
 };
 
 static PyTypeObject PyLdbControl = {
@@ -188,10 +294,39 @@ static void PyErr_SetLdbError(PyObject *error, int ret, struct ldb_context *ldb_
                        Py_BuildValue(discard_const_p(char, "(i,s)"), ret,
                                      ldb_ctx == NULL?ldb_strerror(ret):ldb_errstring(ldb_ctx)));
 }
+static PyObject *py_ldb_bytes_str(PyBytesObject *self)
+{
+       char *msg = NULL;
+       Py_ssize_t size;
+       int result = 0;
+       if (!PyBytes_Check(self)) {
+               PyErr_Format(PyExc_TypeError,"Unexpected type");
+               return NULL;
+       }
+       result = PyBytes_AsStringAndSize((PyObject *)self, &msg, &size);
+       if (result != 0) {
+               PyErr_Format(PyExc_TypeError, "Failed to extract bytes");
+               return NULL;
+       }
+       return PyUnicode_FromStringAndSize(msg, size);
+}
+
+static PyTypeObject PyLdbBytesType = {
+       PyVarObject_HEAD_INIT(NULL, 0)
+       .tp_name = "ldb.bytes",
+       .tp_doc = "str/bytes (with custom str)",
+        .tp_str = (reprfunc)py_ldb_bytes_str,
+       .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+};
 
 static PyObject *PyObject_FromLdbValue(const struct ldb_val *val)
 {
-       return PyString_FromStringAndSize((const char *)val->data, val->length);
+       return PyLdbBytes_FromStringAndSize((const char *)val->data, val->length);
+}
+
+static PyObject *PyStr_FromLdbValue(const struct ldb_val *val)
+{
+       return PyStr_FromStringAndSize((const char *)val->data, val->length);
 }
 
 /**
@@ -317,7 +452,7 @@ static PyObject *PyLdbResult_FromResult(struct ldb_result *result)
        }
 
        for (i = 0;result->refs && result->refs[i]; i++) {
-               PyList_SetItem(referals, i, PyString_FromString(result->refs[i]));
+               PyList_SetItem(referals, i, PyUnicode_FromString(result->refs[i]));
        }
        ret->referals = referals;
        return (PyObject *)ret;
@@ -353,44 +488,51 @@ static struct ldb_result *PyLdbResult_AsResult(TALLOC_CTX *mem_ctx,
        return res;
 }
 
-static PyObject *py_ldb_dn_validate(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_validate(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        return PyBool_FromLong(ldb_dn_validate(self->dn));
 }
 
-static PyObject *py_ldb_dn_is_valid(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_is_valid(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        return PyBool_FromLong(ldb_dn_is_valid(self->dn));
 }
 
-static PyObject *py_ldb_dn_is_special(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_is_special(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        return PyBool_FromLong(ldb_dn_is_special(self->dn));
 }
 
-static PyObject *py_ldb_dn_is_null(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_is_null(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        return PyBool_FromLong(ldb_dn_is_null(self->dn));
 }
  
-static PyObject *py_ldb_dn_get_casefold(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_get_casefold(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
-       return PyString_FromString(ldb_dn_get_casefold(self->dn));
+       return PyUnicode_FromString(ldb_dn_get_casefold(self->dn));
 }
 
 static PyObject *py_ldb_dn_get_linearized(PyLdbDnObject *self)
 {
-       return PyString_FromString(ldb_dn_get_linearized(self->dn));
+       return PyUnicode_FromString(ldb_dn_get_linearized(self->dn));
 }
 
-static PyObject *py_ldb_dn_canonical_str(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_canonical_str(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
-       return PyString_FromString(ldb_dn_canonical_string(self->dn, self->dn));
+       return PyUnicode_FromString(ldb_dn_canonical_string(self->dn, self->dn));
 }
 
-static PyObject *py_ldb_dn_canonical_ex_str(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_canonical_ex_str(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
-       return PyString_FromString(ldb_dn_canonical_ex_string(self->dn, self->dn));
+       return PyUnicode_FromString(ldb_dn_canonical_ex_string(self->dn, self->dn));
 }
 
 static PyObject *py_ldb_dn_extended_str(PyLdbDnObject *self, PyObject *args, PyObject *kwargs)
@@ -401,7 +543,7 @@ static PyObject *py_ldb_dn_extended_str(PyLdbDnObject *self, PyObject *args, PyO
                                         discard_const_p(char *, kwnames),
                                         &mode))
                return NULL;
-       return PyString_FromString(ldb_dn_get_extended_linearized(self->dn, self->dn, mode));
+       return PyUnicode_FromString(ldb_dn_get_extended_linearized(self->dn, self->dn, mode));
 }
 
 static PyObject *py_ldb_dn_get_extended_component(PyLdbDnObject *self, PyObject *args)
@@ -416,28 +558,25 @@ static PyObject *py_ldb_dn_get_extended_component(PyLdbDnObject *self, PyObject
                Py_RETURN_NONE;
        }
 
-       return PyString_FromStringAndSize((const char *)val->data, val->length);
+       return PyBytes_FromStringAndSize((const char *)val->data, val->length);
 }
 
 static PyObject *py_ldb_dn_set_extended_component(PyLdbDnObject *self, PyObject *args)
 {
        char *name;
-       PyObject *value;
        int err;
+       uint8_t *value = NULL;
+       Py_ssize_t size = 0;
 
-       if (!PyArg_ParseTuple(args, "sO", &name, &value))
+       if (!PyArg_ParseTuple(args, "sz#", &name, (char **)&value, &size))
                return NULL;
 
-       if (value == Py_None) {
+       if (value == NULL) {
                err = ldb_dn_set_extended_component(self->dn, name, NULL);
        } else {
                struct ldb_val val;
-               if (!PyString_Check(value)) {
-                       PyErr_SetString(PyExc_TypeError, "Expected a string argument");
-                       return NULL;
-               }
-               val.data = (uint8_t *)PyString_AsString(value);
-               val.length = PyString_Size(value);
+               val.data = (uint8_t *)value;
+               val.length = size;
                err = ldb_dn_set_extended_component(self->dn, name, &val);
        }
 
@@ -451,7 +590,19 @@ static PyObject *py_ldb_dn_set_extended_component(PyLdbDnObject *self, PyObject
 
 static PyObject *py_ldb_dn_repr(PyLdbDnObject *self)
 {
-       return PyString_FromFormat("Dn(%s)", PyObject_REPR(PyString_FromString(ldb_dn_get_linearized(self->dn))));
+       PyObject *str = PyUnicode_FromString(ldb_dn_get_linearized(self->dn));
+       PyObject *repr, *result;
+       if (str == NULL)
+               return NULL;
+       repr = PyObject_Repr(str);
+       if (repr == NULL) {
+               Py_DECREF(str);
+               return NULL;
+       }
+       result = PyStr_FromFormat("Dn(%s)", PyStr_AsUTF8(repr));
+       Py_DECREF(str);
+       Py_DECREF(repr);
+       return result;
 }
 
 static PyObject *py_ldb_dn_check_special(PyLdbDnObject *self, PyObject *args)
@@ -464,16 +615,19 @@ static PyObject *py_ldb_dn_check_special(PyLdbDnObject *self, PyObject *args)
        return PyBool_FromLong(ldb_dn_check_special(self->dn, name));
 }
 
-static int py_ldb_dn_compare(PyLdbDnObject *dn1, PyLdbDnObject *dn2)
+static PyObject *py_ldb_dn_richcmp(PyObject *dn1, PyObject *dn2, int op)
 {
        int ret;
-       ret = ldb_dn_compare(dn1->dn, dn2->dn);
-       if (ret < 0) ret = -1;
-       if (ret > 0) ret = 1;
-       return ret;
+       if (!pyldb_Dn_Check(dn2)) {
+               Py_INCREF(Py_NotImplemented);
+               return Py_NotImplemented;
+       }
+       ret = ldb_dn_compare(pyldb_Dn_AsDn(dn1), pyldb_Dn_AsDn(dn2));
+       return richcmp(ret, op);
 }
 
-static PyObject *py_ldb_dn_get_parent(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_get_parent(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn = pyldb_Dn_AsDn((PyObject *)self);
        struct ldb_dn *parent;
@@ -570,7 +724,7 @@ static PyObject *py_ldb_dn_get_component_name(PyLdbDnObject *self, PyObject *arg
                Py_RETURN_NONE;
        }
 
-       return PyString_FromString(name);
+       return PyUnicode_FromString(name);
 }
 
 static PyObject *py_ldb_dn_get_component_value(PyLdbDnObject *self, PyObject *args)
@@ -589,28 +743,22 @@ static PyObject *py_ldb_dn_get_component_value(PyLdbDnObject *self, PyObject *ar
                Py_RETURN_NONE;
        }
 
-       return PyObject_FromLdbValue(val);
+       return PyStr_FromLdbValue(val);
 }
 
 static PyObject *py_ldb_dn_set_component(PyLdbDnObject *self, PyObject *args)
 {
        unsigned int num = 0;
-       char *name = NULL;
-       PyObject *value = Py_None;
+       char *name = NULL, *value = NULL;
        struct ldb_val val = { NULL, };
        int err;
+       Py_ssize_t size = 0;
 
-       if (!PyArg_ParseTuple(args, "IsO", &num, &name, &value))
+       if (!PyArg_ParseTuple(args, "Iss#", &num, &name, &value, &size))
                return NULL;
 
-       if (value != Py_None) {
-               if (!PyString_Check(value)) {
-                       PyErr_SetString(PyExc_TypeError, "Expected a string argument");
-                       return NULL;
-               }
-               val.data = (uint8_t *)PyString_AsString(value);
-               val.length = PyString_Size(value);
-       }
+       val.data = (unsigned char*) value;
+       val.length = size;
 
        err = ldb_dn_set_component(self->dn, num, name, val);
        if (err != LDB_SUCCESS) {
@@ -621,7 +769,8 @@ static PyObject *py_ldb_dn_set_component(PyLdbDnObject *self, PyObject *args)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_dn_get_rdn_name(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_get_rdn_name(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn;
        const char *name;
@@ -633,10 +782,11 @@ static PyObject *py_ldb_dn_get_rdn_name(PyLdbDnObject *self)
                Py_RETURN_NONE;
        }
 
-       return PyString_FromString(name);
+       return PyUnicode_FromString(name);
 }
 
-static PyObject *py_ldb_dn_get_rdn_value(PyLdbDnObject *self)
+static PyObject *py_ldb_dn_get_rdn_value(PyLdbDnObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn;
        const struct ldb_val *val;
@@ -648,7 +798,7 @@ static PyObject *py_ldb_dn_get_rdn_value(PyLdbDnObject *self)
                Py_RETURN_NONE;
        }
 
-       return PyObject_FromLdbValue(val);
+       return PyStr_FromLdbValue(val);
 }
 
 static PyMethodDef py_ldb_dn_methods[] = {
@@ -664,7 +814,9 @@ static PyMethodDef py_ldb_dn_methods[] = {
                "Check whether this is a null DN." },
        { "get_casefold", (PyCFunction)py_ldb_dn_get_casefold, METH_NOARGS,
                NULL },
-       { "get_linearized", (PyCFunction)py_ldb_dn_get_linearized, METH_NOARGS,
+       { "get_linearized", PY_DISCARD_FUNC_SIG(PyCFunction,
+                                               py_ldb_dn_get_linearized),
+               METH_NOARGS,
                NULL },
        { "canonical_str", (PyCFunction)py_ldb_dn_canonical_str, METH_NOARGS,
                "S.canonical_str() -> string\n"
@@ -674,7 +826,9 @@ static PyMethodDef py_ldb_dn_methods[] = {
        { "canonical_ex_str", (PyCFunction)py_ldb_dn_canonical_ex_str, METH_NOARGS,
                "S.canonical_ex_str() -> string\n"
                "Canonical version of this DN (like a posix path, with terminating newline)." },
-       { "extended_str", (PyCFunction)py_ldb_dn_extended_str, METH_VARARGS | METH_KEYWORDS,
+       { "extended_str", PY_DISCARD_FUNC_SIG(PyCFunction,
+                                             py_ldb_dn_extended_str),
+               METH_VARARGS | METH_KEYWORDS,
                "S.extended_str(mode=1) -> string\n"
                "Extended version of this DN" },
        { "parent", (PyCFunction)py_ldb_dn_get_parent, METH_NOARGS,
@@ -765,22 +919,22 @@ static PySequenceMethods py_ldb_dn_seq = {
 
 static PyObject *py_ldb_dn_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
 {
-       struct ldb_dn *ret;
-       char *str;
-       PyObject *py_ldb;
-       struct ldb_context *ldb_ctx;
-       TALLOC_CTX *mem_ctx;
-       PyLdbDnObject *py_ret;
+       struct ldb_dn *ret = NULL;
+       char *str = NULL;
+       PyObject *py_ldb = NULL;
+       struct ldb_context *ldb_ctx = NULL;
+       TALLOC_CTX *mem_ctx = NULL;
+       PyLdbDnObject *py_ret = NULL;
        const char * const kwnames[] = { "ldb", "dn", NULL };
 
-       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "Os",
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O"PYARG_STR_UNI,
                                         discard_const_p(char *, kwnames),
-                                        &py_ldb, &str))
-               return NULL;
+                                        &py_ldb, "utf8", &str))
+               goto out;
 
        if (!PyLdb_Check(py_ldb)) {
                PyErr_SetString(PyExc_TypeError, "Expected Ldb");
-               return NULL;
+               goto out;
        }
 
        ldb_ctx = pyldb_Ldb_AsLdbContext(py_ldb);
@@ -788,24 +942,28 @@ static PyObject *py_ldb_dn_new(PyTypeObject *type, PyObject *args, PyObject *kwa
        mem_ctx = talloc_new(NULL);
        if (mem_ctx == NULL) {
                PyErr_NoMemory();
-               return NULL;
+               goto out;
        }
 
        ret = ldb_dn_new(mem_ctx, ldb_ctx, str);
        if (!ldb_dn_validate(ret)) {
                talloc_free(mem_ctx);
                PyErr_SetString(PyExc_ValueError, "unable to parse dn string");
-               return NULL;
+               goto out;
        }
 
        py_ret = (PyLdbDnObject *)type->tp_alloc(type, 0);
-       if (ret == NULL) {
+       if (py_ret == NULL) {
                talloc_free(mem_ctx);
                PyErr_NoMemory();
-               return NULL;
+               goto out;
        }
        py_ret->mem_ctx = mem_ctx;
        py_ret->dn = ret;
+out:
+       if (str != NULL) {
+               PyMem_Free(discard_const_p(char, str));
+       }
        return (PyObject *)py_ret;
 }
 
@@ -820,7 +978,7 @@ static PyTypeObject PyLdbDn = {
        .tp_methods = py_ldb_dn_methods,
        .tp_str = (reprfunc)py_ldb_dn_get_linearized,
        .tp_repr = (reprfunc)py_ldb_dn_repr,
-       .tp_compare = (cmpfunc)py_ldb_dn_compare,
+       .tp_richcompare = (richcmpfunc)py_ldb_dn_richcmp,
        .tp_as_sequence = &py_ldb_dn_seq,
        .tp_doc = "A LDB distinguished name.",
        .tp_new = py_ldb_dn_new,
@@ -834,7 +992,7 @@ static void py_ldb_debug(void *context, enum ldb_debug_level level, const char *
 static void py_ldb_debug(void *context, enum ldb_debug_level level, const char *fmt, va_list ap)
 {
        PyObject *fn = (PyObject *)context;
-       PyObject_CallFunction(fn, discard_const_p(char, "(i,O)"), level, PyString_FromFormatV(fmt, ap));
+       PyObject_CallFunction(fn, discard_const_p(char, "(i,O)"), level, PyStr_FromFormatV(fmt, ap));
 }
 
 static PyObject *py_ldb_debug_func;
@@ -884,7 +1042,8 @@ static PyObject *py_ldb_set_modules_dir(PyTypeObject *self, PyObject *args)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_transaction_start(PyLdbObject *self)
+static PyObject *py_ldb_transaction_start(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb_ctx = pyldb_Ldb_AsLdbContext(self);
        int ldb_err;
@@ -893,7 +1052,8 @@ static PyObject *py_ldb_transaction_start(PyLdbObject *self)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_transaction_commit(PyLdbObject *self)
+static PyObject *py_ldb_transaction_commit(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb_ctx = pyldb_Ldb_AsLdbContext(self);
        int ldb_err;
@@ -902,7 +1062,8 @@ static PyObject *py_ldb_transaction_commit(PyLdbObject *self)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_transaction_prepare_commit(PyLdbObject *self)
+static PyObject *py_ldb_transaction_prepare_commit(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb_ctx = pyldb_Ldb_AsLdbContext(self);
        int ldb_err;
@@ -911,7 +1072,8 @@ static PyObject *py_ldb_transaction_prepare_commit(PyLdbObject *self)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_transaction_cancel(PyLdbObject *self)
+static PyObject *py_ldb_transaction_cancel(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb_ctx = pyldb_Ldb_AsLdbContext(self);
        int ldb_err;
@@ -920,7 +1082,8 @@ static PyObject *py_ldb_transaction_cancel(PyLdbObject *self)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_setup_wellknown_attributes(PyLdbObject *self)
+static PyObject *py_ldb_setup_wellknown_attributes(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb_ctx = pyldb_Ldb_AsLdbContext(self);
        int ldb_err;
@@ -931,10 +1094,11 @@ static PyObject *py_ldb_setup_wellknown_attributes(PyLdbObject *self)
 
 static PyObject *py_ldb_repr(PyLdbObject *self)
 {
-       return PyString_FromFormat("<ldb connection>");
+       return PyUnicode_FromString("<ldb connection>");
 }
 
-static PyObject *py_ldb_get_root_basedn(PyLdbObject *self)
+static PyObject *py_ldb_get_root_basedn(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn = ldb_get_root_basedn(pyldb_Ldb_AsLdbContext(self));
        if (dn == NULL)
@@ -943,7 +1107,8 @@ static PyObject *py_ldb_get_root_basedn(PyLdbObject *self)
 }
 
 
-static PyObject *py_ldb_get_schema_basedn(PyLdbObject *self)
+static PyObject *py_ldb_get_schema_basedn(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn = ldb_get_schema_basedn(pyldb_Ldb_AsLdbContext(self));
        if (dn == NULL)
@@ -951,7 +1116,8 @@ static PyObject *py_ldb_get_schema_basedn(PyLdbObject *self)
        return py_ldb_dn_copy(dn);
 }
 
-static PyObject *py_ldb_get_config_basedn(PyLdbObject *self)
+static PyObject *py_ldb_get_config_basedn(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn = ldb_get_config_basedn(pyldb_Ldb_AsLdbContext(self));
        if (dn == NULL)
@@ -959,7 +1125,8 @@ static PyObject *py_ldb_get_config_basedn(PyLdbObject *self)
        return py_ldb_dn_copy(dn);
 }
 
-static PyObject *py_ldb_get_default_basedn(PyLdbObject *self)
+static PyObject *py_ldb_get_default_basedn(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_dn *dn = ldb_get_default_basedn(pyldb_Ldb_AsLdbContext(self));
        if (dn == NULL)
@@ -967,8 +1134,8 @@ static PyObject *py_ldb_get_default_basedn(PyLdbObject *self)
        return py_ldb_dn_copy(dn);
 }
 
-static const char **PyList_AsStringList(TALLOC_CTX *mem_ctx, PyObject *list, 
-                                       const char *paramname)
+static const char **PyList_AsStrList(TALLOC_CTX *mem_ctx, PyObject *list,
+                    const char *paramname)
 {
        const char **ret;
        Py_ssize_t i;
@@ -983,13 +1150,20 @@ static const char **PyList_AsStringList(TALLOC_CTX *mem_ctx, PyObject *list,
        }
 
        for (i = 0; i < PyList_Size(list); i++) {
+               const char *str = NULL;
+               Py_ssize_t size;
                PyObject *item = PyList_GetItem(list, i);
-               if (!PyString_Check(item)) {
+               if (!(PyUnicode_Check(item) || PyUnicode_Check(item))) {
                        PyErr_Format(PyExc_TypeError, "%s should be strings", paramname);
+                       talloc_free(ret);
+                       return NULL;
+               }
+               str = PyStr_AsUTF8AndSize(item, &size);
+               if (str == NULL) {
+                       talloc_free(ret);
                        return NULL;
                }
-               ret[i] = talloc_strndup(ret, PyString_AsString(item),
-                                       PyString_Size(item));
+               ret[i] = talloc_strndup(ret, str, size);
        }
        ret[i] = NULL;
        return ret;
@@ -1015,7 +1189,7 @@ static int py_ldb_init(PyLdbObject *self, PyObject *args, PyObject *kwargs)
        if (py_options == Py_None) {
                options = NULL;
        } else {
-               options = PyList_AsStringList(ldb, py_options, "options");
+               options = PyList_AsStrList(ldb, py_options, "options");
                if (options == NULL)
                        return -1;
        }
@@ -1055,7 +1229,7 @@ static PyObject *py_ldb_new(PyTypeObject *type, PyObject *args, PyObject *kwargs
 
 static PyObject *py_ldb_connect(PyLdbObject *self, PyObject *args, PyObject *kwargs)
 {
-       char *url;
+       char *url = NULL;
        unsigned int flags = 0;
        PyObject *py_options = Py_None;
        int ret;
@@ -1063,7 +1237,7 @@ static PyObject *py_ldb_connect(PyLdbObject *self, PyObject *args, PyObject *kwa
        const char * const kwnames[] = { "url", "flags", "options", NULL };
        struct ldb_context *ldb_ctx;
 
-       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|zIO",
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "z|IO",
                                         discard_const_p(char *, kwnames),
                                         &url, &flags, &py_options))
                return NULL;
@@ -1071,7 +1245,7 @@ static PyObject *py_ldb_connect(PyLdbObject *self, PyObject *args, PyObject *kwa
        if (py_options == Py_None) {
                options = NULL;
        } else {
-               options = PyList_AsStringList(NULL, py_options, "options");
+               options = PyList_AsStrList(NULL, py_options, "options");
                if (options == NULL)
                        return NULL;
        }
@@ -1113,7 +1287,7 @@ static PyObject *py_ldb_modify(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_controls == Py_None) {
                parsed_controls = NULL;
        } else {
-               const char **controls = PyList_AsStringList(mem_ctx, py_controls, "controls");
+               const char **controls = PyList_AsStrList(mem_ctx, py_controls, "controls");
                if (controls == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1140,7 +1314,7 @@ static PyObject *py_ldb_modify(PyLdbObject *self, PyObject *args, PyObject *kwar
 
        ret = ldb_build_mod_req(&req, ldb_ctx, mem_ctx, msg, parsed_controls,
                                NULL, ldb_op_default_callback, NULL);
-        if (ret != LDB_SUCCESS) {
+       if (ret != LDB_SUCCESS) {
                PyErr_SetString(PyExc_TypeError, "failed to build request");
                talloc_free(mem_ctx);
                return NULL;
@@ -1217,7 +1391,7 @@ static struct ldb_message *PyDict_AsMessage(TALLOC_CTX *mem_ctx,
        }
 
        while (PyDict_Next(py_obj, &dict_pos, &key, &value)) {
-               char *key_str = PyString_AsString(key);
+               const char *key_str = PyStr_AsUTF8(key);
                if (ldb_attr_cmp(key_str, "dn") != 0) {
                        msg_el = PyObject_AsMessageElement(msg->elements, value,
                                                           mod_flags, key_str);
@@ -1262,7 +1436,7 @@ static PyObject *py_ldb_add(PyLdbObject *self, PyObject *args, PyObject *kwargs)
        if (py_controls == Py_None) {
                parsed_controls = NULL;
        } else {
-               const char **controls = PyList_AsStringList(mem_ctx, py_controls, "controls");
+               const char **controls = PyList_AsStrList(mem_ctx, py_controls, "controls");
                if (controls == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1355,7 +1529,7 @@ static PyObject *py_ldb_delete(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_controls == Py_None) {
                parsed_controls = NULL;
        } else {
-               const char **controls = PyList_AsStringList(mem_ctx, py_controls, "controls");
+               const char **controls = PyList_AsStrList(mem_ctx, py_controls, "controls");
                if (controls == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1433,7 +1607,7 @@ static PyObject *py_ldb_rename(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_controls == Py_None) {
                parsed_controls = NULL;
        } else {
-               const char **controls = PyList_AsStringList(mem_ctx, py_controls, "controls");
+               const char **controls = PyList_AsStrList(mem_ctx, py_controls, "controls");
                if (controls == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1523,9 +1697,13 @@ static PyObject *ldb_ldif_to_pyobject(struct ldb_ldif *ldif)
                Py_RETURN_NONE;
        } else {
        /* We don't want this attached to the 'ldb' any more */
-               return Py_BuildValue(discard_const_p(char, "(iO)"),
-                                    ldif->changetype,
-                                    PyLdbMessage_FromMessage(ldif->msg));
+               PyObject *obj = PyLdbMessage_FromMessage(ldif->msg);
+               PyObject *result =
+                       Py_BuildValue(discard_const_p(char, "(iO)"),
+                                     ldif->changetype,
+                                     obj);
+               Py_CLEAR(obj);
+               return result;
        }
 }
 
@@ -1558,7 +1736,7 @@ static PyObject *py_ldb_write_ldif(PyLdbObject *self, PyObject *args)
                return NULL;
        }
 
-       ret = PyString_FromString(string);
+       ret = PyUnicode_FromString(string);
 
        talloc_free(mem_ctx);
 
@@ -1570,6 +1748,7 @@ static PyObject *py_ldb_parse_ldif(PyLdbObject *self, PyObject *args)
        PyObject *list, *ret;
        struct ldb_ldif *ldif;
        const char *s;
+       struct ldb_dn *last_dn = NULL;
 
        TALLOC_CTX *mem_ctx;
 
@@ -1586,10 +1765,47 @@ static PyObject *py_ldb_parse_ldif(PyLdbObject *self, PyObject *args)
                ldif = ldb_ldif_read_string(self->ldb_ctx, &s);
                talloc_steal(mem_ctx, ldif);
                if (ldif) {
-                       PyList_Append(list, ldb_ldif_to_pyobject(ldif));
+                       int res = 0;
+                       PyObject *py_ldif = ldb_ldif_to_pyobject(ldif);
+                       if (py_ldif == NULL) {
+                               Py_CLEAR(list);
+                               PyErr_BadArgument();
+                               talloc_free(mem_ctx);
+                               return NULL;
+                       }
+                       res = PyList_Append(list, py_ldif);
+                       Py_CLEAR(py_ldif);
+                       if (res == -1) {
+                               Py_CLEAR(list);
+                               talloc_free(mem_ctx);
+                               return NULL;
+                       }
+                       last_dn = ldif->msg->dn;
                } else {
-                       PyErr_SetString(PyExc_ValueError, "unable to parse ldif string");
+                       const char *last_dn_str = NULL;
+                       const char *err_string = NULL;
+                       if (last_dn == NULL) {
+                               PyErr_SetString(PyExc_ValueError,
+                                               "unable to parse LDIF "
+                                               "string at first chunk");
+                               Py_CLEAR(list);
+                               talloc_free(mem_ctx);
+                               return NULL;
+                       }
+
+                       last_dn_str
+                               = ldb_dn_get_linearized(last_dn);
+
+                       err_string
+                               = talloc_asprintf(mem_ctx,
+                                                 "unable to parse ldif "
+                                                 "string AFTER %s",
+                                                 last_dn_str);
+
+                       PyErr_SetString(PyExc_ValueError,
+                                       err_string);
                        talloc_free(mem_ctx);
+                       Py_CLEAR(list);
                        return NULL;
                }
        }
@@ -1647,14 +1863,16 @@ static PyObject *py_ldb_schema_format_value(PyLdbObject *self, PyObject *args)
        PyObject *ret;
        char *element_name;
        PyObject *val;
+       Py_ssize_t size;
+       int result;
 
        if (!PyArg_ParseTuple(args, "sO", &element_name, &val))
                return NULL;
 
-       old_val.data = (uint8_t *)PyString_AsString(val);
-       old_val.length = PyString_Size(val);
+       result = PyBytes_AsStringAndSize(val, (char **)&old_val.data, &size);
+       old_val.length = size;
 
-       if (old_val.data == NULL) {
+       if (result != 0) {
                PyErr_SetString(PyExc_RuntimeError, "Failed to convert passed value to String");
                return NULL;
        }
@@ -1676,7 +1894,7 @@ static PyObject *py_ldb_schema_format_value(PyLdbObject *self, PyObject *args)
                Py_RETURN_NONE;
        }
 
-       ret = PyString_FromStringAndSize((const char *)new_val.data, new_val.length);
+       ret = PyBytes_FromStringAndSize((const char *)new_val.data, new_val.length);
 
        talloc_free(mem_ctx);
 
@@ -1718,7 +1936,7 @@ static PyObject *py_ldb_search(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_attrs == Py_None) {
                attrs = NULL;
        } else {
-               attrs = PyList_AsStringList(mem_ctx, py_attrs, "attrs");
+               attrs = PyList_AsStrList(mem_ctx, py_attrs, "attrs");
                if (attrs == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1728,8 +1946,8 @@ static PyObject *py_ldb_search(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_base == Py_None) {
                base = ldb_get_default_basedn(ldb_ctx);
        } else {
-               if (!pyldb_Object_AsDn(ldb_ctx, py_base, ldb_ctx, &base)) {
-                       talloc_free(attrs);
+               if (!pyldb_Object_AsDn(mem_ctx, py_base, ldb_ctx, &base)) {
+                       talloc_free(mem_ctx);
                        return NULL;
                }
        }
@@ -1737,7 +1955,7 @@ static PyObject *py_ldb_search(PyLdbObject *self, PyObject *args, PyObject *kwar
        if (py_controls == Py_None) {
                parsed_controls = NULL;
        } else {
-               const char **controls = PyList_AsStringList(mem_ctx, py_controls, "controls");
+               const char **controls = PyList_AsStrList(mem_ctx, py_controls, "controls");
                if (controls == NULL) {
                        talloc_free(mem_ctx);
                        return NULL;
@@ -1790,6 +2008,200 @@ static PyObject *py_ldb_search(PyLdbObject *self, PyObject *args, PyObject *kwar
        return py_ret;
 }
 
+static int py_ldb_search_iterator_reply_destructor(struct py_ldb_search_iterator_reply *reply)
+{
+       if (reply->py_iter != NULL) {
+               DLIST_REMOVE(reply->py_iter->state.next, reply);
+               if (reply->py_iter->state.result == reply) {
+                       reply->py_iter->state.result = NULL;
+               }
+               reply->py_iter = NULL;
+       }
+
+       if (reply->obj != NULL) {
+               Py_DECREF(reply->obj);
+               reply->obj = NULL;
+       }
+
+       return 0;
+}
+
+static int py_ldb_search_iterator_callback(struct ldb_request *req,
+                                          struct ldb_reply *ares)
+{
+       PyLdbSearchIteratorObject *py_iter = (PyLdbSearchIteratorObject *)req->context;
+       struct ldb_result result = { .msgs = NULL };
+       struct py_ldb_search_iterator_reply *reply = NULL;
+
+       if (ares == NULL) {
+               return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+       }
+
+       if (ares->error != LDB_SUCCESS) {
+               int ret = ares->error;
+               TALLOC_FREE(ares);
+               return ldb_request_done(req, ret);
+       }
+
+       reply = talloc_zero(py_iter->mem_ctx,
+                           struct py_ldb_search_iterator_reply);
+       if (reply == NULL) {
+               TALLOC_FREE(ares);
+               return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+       }
+       reply->py_iter = py_iter;
+       talloc_set_destructor(reply, py_ldb_search_iterator_reply_destructor);
+
+       switch (ares->type) {
+       case LDB_REPLY_ENTRY:
+               reply->obj = PyLdbMessage_FromMessage(ares->message);
+               if (reply->obj == NULL) {
+                       TALLOC_FREE(ares);
+                       return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+               }
+               DLIST_ADD_END(py_iter->state.next, reply);
+               TALLOC_FREE(ares);
+               return LDB_SUCCESS;
+
+       case LDB_REPLY_REFERRAL:
+               reply->obj = PyUnicode_FromString(ares->referral);
+               if (reply->obj == NULL) {
+                       TALLOC_FREE(ares);
+                       return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+               }
+               DLIST_ADD_END(py_iter->state.next, reply);
+               TALLOC_FREE(ares);
+               return LDB_SUCCESS;
+
+       case LDB_REPLY_DONE:
+               result = (struct ldb_result) { .controls = ares->controls };
+               reply->obj = PyLdbResult_FromResult(&result);
+               if (reply->obj == NULL) {
+                       TALLOC_FREE(ares);
+                       return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+               }
+               py_iter->state.result = reply;
+               TALLOC_FREE(ares);
+               return ldb_request_done(req, LDB_SUCCESS);
+       }
+
+       TALLOC_FREE(ares);
+       return ldb_request_done(req, LDB_ERR_OPERATIONS_ERROR);
+}
+
+static PyObject *py_ldb_search_iterator(PyLdbObject *self, PyObject *args, PyObject *kwargs)
+{
+       PyObject *py_base = Py_None;
+       int scope = LDB_SCOPE_DEFAULT;
+       int timeout = 0;
+       char *expr = NULL;
+       PyObject *py_attrs = Py_None;
+       PyObject *py_controls = Py_None;
+       const char * const kwnames[] = { "base", "scope", "expression", "attrs", "controls", "timeout", NULL };
+       int ret;
+       const char **attrs;
+       struct ldb_context *ldb_ctx;
+       struct ldb_control **parsed_controls;
+       struct ldb_dn *base;
+       PyLdbSearchIteratorObject *py_iter;
+
+       /* type "int" rather than "enum" for "scope" is intentional */
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OizOOi",
+                                        discard_const_p(char *, kwnames),
+                                        &py_base, &scope, &expr, &py_attrs, &py_controls, &timeout))
+               return NULL;
+
+       py_iter = (PyLdbSearchIteratorObject *)PyLdbSearchIterator.tp_alloc(&PyLdbSearchIterator, 0);
+       if (py_iter == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+       py_iter->ldb = self;
+       Py_INCREF(self);
+       ZERO_STRUCT(py_iter->state);
+       py_iter->mem_ctx = talloc_new(NULL);
+       if (py_iter->mem_ctx == NULL) {
+               Py_DECREF(py_iter);
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       ldb_ctx = pyldb_Ldb_AsLdbContext(self);
+
+       if (py_attrs == Py_None) {
+               attrs = NULL;
+       } else {
+               attrs = PyList_AsStrList(py_iter->mem_ctx, py_attrs, "attrs");
+               if (attrs == NULL) {
+                       Py_DECREF(py_iter);
+                       PyErr_NoMemory();
+                       return NULL;
+               }
+       }
+
+       if (py_base == Py_None) {
+               base = ldb_get_default_basedn(ldb_ctx);
+       } else {
+               if (!pyldb_Object_AsDn(py_iter->mem_ctx, py_base, ldb_ctx, &base)) {
+                       Py_DECREF(py_iter);
+                       PyErr_NoMemory();
+                       return NULL;
+               }
+       }
+
+       if (py_controls == Py_None) {
+               parsed_controls = NULL;
+       } else {
+               const char **controls = NULL;
+
+               controls = PyList_AsStrList(py_iter->mem_ctx,
+                                           py_controls, "controls");
+               if (controls == NULL) {
+                       Py_DECREF(py_iter);
+                       PyErr_NoMemory();
+                       return NULL;
+               }
+
+               parsed_controls = ldb_parse_control_strings(ldb_ctx,
+                                                           py_iter->mem_ctx,
+                                                           controls);
+               if (controls[0] != NULL && parsed_controls == NULL) {
+                       Py_DECREF(py_iter);
+                       PyErr_NoMemory();
+                       return NULL;
+               }
+               talloc_free(controls);
+       }
+
+       ret = ldb_build_search_req(&py_iter->state.req,
+                                  ldb_ctx,
+                                  py_iter->mem_ctx,
+                                  base,
+                                  scope,
+                                  expr,
+                                  attrs,
+                                  parsed_controls,
+                                  py_iter,
+                                  py_ldb_search_iterator_callback,
+                                  NULL);
+       if (ret != LDB_SUCCESS) {
+               Py_DECREF(py_iter);
+               PyErr_SetLdbError(PyExc_LdbError, ret, ldb_ctx);
+               return NULL;
+       }
+
+       ldb_set_timeout(ldb_ctx, py_iter->state.req, timeout);
+
+       ret = ldb_request(ldb_ctx, py_iter->state.req);
+       if (ret != LDB_SUCCESS) {
+               Py_DECREF(py_iter);
+               PyErr_SetLdbError(PyExc_LdbError, ret, ldb_ctx);
+               return NULL;
+       }
+
+       return (PyObject *)py_iter;
+}
+
 static PyObject *py_ldb_get_opaque(PyLdbObject *self, PyObject *args)
 {
        char *name;
@@ -1823,14 +2235,31 @@ static PyObject *py_ldb_set_opaque(PyLdbObject *self, PyObject *args)
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_modules(PyLdbObject *self)
+static PyObject *py_ldb_modules(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_context *ldb = pyldb_Ldb_AsLdbContext(self);
        PyObject *ret = PyList_New(0);
        struct ldb_module *mod;
 
+       if (ret == NULL) {
+               return PyErr_NoMemory();
+       }
        for (mod = ldb->modules; mod; mod = mod->next) {
-               PyList_Append(ret, PyLdbModule_FromModule(mod));
+               PyObject *item = PyLdbModule_FromModule(mod);
+               int res = 0;
+               if (item == NULL) {
+                       PyErr_SetString(PyExc_RuntimeError,
+                               "Failed to load LdbModule");
+                       Py_CLEAR(ret);
+                       return NULL;
+               }
+               res = PyList_Append(ret, item);
+               Py_CLEAR(item);
+               if (res == -1) {
+                       Py_CLEAR(ret);
+                       return NULL;
+               }
        }
 
        return ret;
@@ -1853,6 +2282,29 @@ static PyObject *py_ldb_sequence_number(PyLdbObject *self, PyObject *args)
 
        return PyLong_FromLongLong(value);
 }
+
+
+static const struct ldb_dn_extended_syntax test_dn_syntax = {
+       .name             = "TEST",
+       .read_fn          = ldb_handler_copy,
+       .write_clear_fn   = ldb_handler_copy,
+       .write_hex_fn     = ldb_handler_copy,
+};
+
+static PyObject *py_ldb_register_test_extensions(PyLdbObject *self,
+               PyObject *Py_UNUSED(ignored))
+{
+       struct ldb_context *ldb = pyldb_Ldb_AsLdbContext(self);
+       int ret;
+
+       ret = ldb_dn_extended_add_syntax(ldb, LDB_ATTR_FLAG_FIXED, &test_dn_syntax);
+
+       PyErr_LDB_ERROR_IS_ERR_RAISE(PyExc_LdbError, ret, ldb);
+
+       Py_RETURN_NONE;
+}
+
+
 static PyMethodDef py_ldb_methods[] = {
        { "set_debug", (PyCFunction)py_ldb_set_debug, METH_VARARGS, 
                "S.set_debug(callback) -> None\n"
@@ -1886,23 +2338,42 @@ static PyMethodDef py_ldb_methods[] = {
                NULL },
        { "get_config_basedn", (PyCFunction)py_ldb_get_config_basedn, METH_NOARGS,
                NULL },
-       { "connect", (PyCFunction)py_ldb_connect, METH_VARARGS|METH_KEYWORDS, 
+       { "connect", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_connect),
+               METH_VARARGS|METH_KEYWORDS,
                "S.connect(url, flags=0, options=None) -> None\n"
                "Connect to a LDB URL." },
-       { "modify", (PyCFunction)py_ldb_modify, METH_VARARGS|METH_KEYWORDS,
+       { "modify", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_modify),
+               METH_VARARGS|METH_KEYWORDS,
                "S.modify(message, controls=None, validate=False) -> None\n"
                "Modify an entry." },
-       { "add", (PyCFunction)py_ldb_add, METH_VARARGS|METH_KEYWORDS,
+       { "add", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_add),
+               METH_VARARGS|METH_KEYWORDS,
                "S.add(message, controls=None) -> None\n"
                "Add an entry." },
-       { "delete", (PyCFunction)py_ldb_delete, METH_VARARGS|METH_KEYWORDS,
+       { "delete", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_delete),
+               METH_VARARGS|METH_KEYWORDS,
                "S.delete(dn, controls=None) -> None\n"
                "Remove an entry." },
-       { "rename", (PyCFunction)py_ldb_rename, METH_VARARGS|METH_KEYWORDS,
+       { "rename", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_rename),
+               METH_VARARGS|METH_KEYWORDS,
                "S.rename(old_dn, new_dn, controls=None) -> None\n"
                "Rename an entry." },
-       { "search", (PyCFunction)py_ldb_search, METH_VARARGS|METH_KEYWORDS,
-               "S.search(base=None, scope=None, expression=None, attrs=None, controls=None) -> msgs\n"
+       { "search", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_search),
+               METH_VARARGS|METH_KEYWORDS,
+               "S.search(base=None, scope=None, expression=None, attrs=None, controls=None) -> result\n"
+               "Search in a database.\n"
+               "\n"
+               ":param base: Optional base DN to search\n"
+               ":param scope: Search scope (SCOPE_BASE, SCOPE_ONELEVEL or SCOPE_SUBTREE)\n"
+               ":param expression: Optional search expression\n"
+               ":param attrs: Attributes to return (defaults to all)\n"
+               ":param controls: Optional list of controls\n"
+               ":return: ldb.Result object\n"
+       },
+       { "search_iterator", PY_DISCARD_FUNC_SIG(PyCFunction,
+                                                py_ldb_search_iterator),
+               METH_VARARGS|METH_KEYWORDS,
+               "S.search_iterator(base=None, scope=None, expression=None, attrs=None, controls=None, timeout=None) -> iterator\n"
                "Search in a database.\n"
                "\n"
                ":param base: Optional base DN to search\n"
@@ -1910,7 +2381,8 @@ static PyMethodDef py_ldb_methods[] = {
                ":param expression: Optional search expression\n"
                ":param attrs: Attributes to return (defaults to all)\n"
                ":param controls: Optional list of controls\n"
-               ":return: Iterator over Message objects\n"
+               ":param timeout: Optional timeout in seconds (defaults to 300), 0 means the default, -1 no timeout\n"
+               ":return: ldb.SearchIterator object that provides results when they arrive\n"
        },
        { "schema_attribute_remove", (PyCFunction)py_ldb_schema_attribute_remove, METH_VARARGS,
                NULL },
@@ -1942,6 +2414,9 @@ static PyMethodDef py_ldb_methods[] = {
        { "sequence_number", (PyCFunction)py_ldb_sequence_number, METH_VARARGS,
                "S.sequence_number(type) -> value\n"
                "Return the value of the sequence according to the requested type" },
+       { "_register_test_extensions", (PyCFunction)py_ldb_register_test_extensions, METH_NOARGS,
+               "S._register_test_extensions() -> None\n"
+               "Register internal extensions used in testing" },
        { NULL },
 };
 
@@ -1961,12 +2436,19 @@ static PyObject *PyLdbModule_FromModule(struct ldb_module *mod)
 
 static PyObject *py_ldb_get_firstmodule(PyLdbObject *self, void *closure)
 {
-       return PyLdbModule_FromModule(pyldb_Ldb_AsLdbContext(self)->modules);
+       struct ldb_module *mod = pyldb_Ldb_AsLdbContext(self)->modules;
+       if (mod == NULL) {
+               Py_RETURN_NONE;
+       }
+       return PyLdbModule_FromModule(mod);
 }
 
 static PyGetSetDef py_ldb_getset[] = {
-       { discard_const_p(char, "firstmodule"), (getter)py_ldb_get_firstmodule, NULL, NULL },
-       { NULL }
+       {
+               .name = discard_const_p(char, "firstmodule"),
+               .get  = (getter)py_ldb_get_firstmodule,
+       },
+       { .name = NULL },
 };
 
 static int py_ldb_contains(PyLdbObject *self, PyObject *obj)
@@ -2081,11 +2563,23 @@ static PyObject *py_ldb_result_get_count(PyLdbResultObject *self, void *closure)
 }
 
 static PyGetSetDef py_ldb_result_getset[] = {
-       { discard_const_p(char, "controls"), (getter)py_ldb_result_get_controls, NULL, NULL },
-       { discard_const_p(char, "msgs"), (getter)py_ldb_result_get_msgs, NULL, NULL },
-       { discard_const_p(char, "referals"), (getter)py_ldb_result_get_referals, NULL, NULL },
-       { discard_const_p(char, "count"), (getter)py_ldb_result_get_count, NULL, NULL },
-       { NULL }
+       {
+               .name = discard_const_p(char, "controls"),
+               .get  = (getter)py_ldb_result_get_controls,
+       },
+       {
+               .name = discard_const_p(char, "msgs"),
+               .get  = (getter)py_ldb_result_get_msgs,
+       },
+       {
+               .name = discard_const_p(char, "referals"),
+               .get  = (getter)py_ldb_result_get_referals,
+       },
+       {
+               .name = discard_const_p(char, "count"),
+               .get  = (getter)py_ldb_result_get_count,
+       },
+       { .name = NULL },
 };
 
 static PyObject *py_ldb_result_iter(PyLdbResultObject *self)
@@ -2110,7 +2604,7 @@ static PySequenceMethods py_ldb_result_seq = {
 
 static PyObject *py_ldb_result_repr(PyLdbObject *self)
 {
-       return PyString_FromFormat("<ldb result>");
+       return PyUnicode_FromString("<ldb result>");
 }
 
 
@@ -2127,30 +2621,176 @@ static PyTypeObject PyLdbResult = {
        .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
 };
 
+static void py_ldb_search_iterator_dealloc(PyLdbSearchIteratorObject *self)
+{
+       Py_XDECREF(self->state.exception);
+       TALLOC_FREE(self->mem_ctx);
+       ZERO_STRUCT(self->state);
+       Py_DECREF(self->ldb);
+       Py_TYPE(self)->tp_free(self);
+}
+
+static PyObject *py_ldb_search_iterator_next(PyLdbSearchIteratorObject *self)
+{
+       PyObject *py_ret = NULL;
+
+       if (self->state.req == NULL) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               "ldb.SearchIterator request already finished");
+               return NULL;
+       }
+
+       /*
+        * TODO: do we want a non-blocking mode?
+        * In future we may add an optional 'nonblocking'
+        * argument to search_iterator().
+        *
+        * For now we keep it simple and wait for at
+        * least one reply.
+        */
+
+       while (self->state.next == NULL) {
+               int ret;
+
+               if (self->state.result != NULL) {
+                       /*
+                        * We (already) got a final result from the server.
+                        *
+                        * We stop the iteration and let
+                        * py_ldb_search_iterator_result() will deliver
+                        * the result details.
+                        */
+                       TALLOC_FREE(self->state.req);
+                       PyErr_SetNone(PyExc_StopIteration);
+                       return NULL;
+               }
+
+               ret = ldb_wait(self->state.req->handle, LDB_WAIT_NONE);
+               if (ret != LDB_SUCCESS) {
+                       struct ldb_context *ldb_ctx;
+                       TALLOC_FREE(self->state.req);
+                       ldb_ctx = pyldb_Ldb_AsLdbContext(self->ldb);
+                       /*
+                        * We stop the iteration and let
+                        * py_ldb_search_iterator_result() will deliver
+                        * the exception.
+                        */
+                       self->state.exception = Py_BuildValue(discard_const_p(char, "(i,s)"),
+                                               ret, ldb_errstring(ldb_ctx));
+                       PyErr_SetNone(PyExc_StopIteration);
+                       return NULL;
+               }
+       }
+
+       py_ret = self->state.next->obj;
+       self->state.next->obj = NULL;
+       /* no TALLOC_FREE() as self->state.next is a list */
+       talloc_free(self->state.next);
+       return py_ret;
+}
+
+static PyObject *py_ldb_search_iterator_result(PyLdbSearchIteratorObject *self,
+               PyObject *Py_UNUSED(ignored))
+{
+       PyObject *py_ret = NULL;
+
+       if (self->state.req != NULL) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               "ldb.SearchIterator request running");
+               return NULL;
+       }
+
+       if (self->state.next != NULL) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               "ldb.SearchIterator not fully consumed.");
+               return NULL;
+       }
+
+       if (self->state.exception != NULL) {
+               PyErr_SetObject(PyExc_LdbError, self->state.exception);
+               self->state.exception = NULL;
+               return NULL;
+       }
+
+       if (self->state.result == NULL) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               "ldb.SearchIterator result already consumed");
+               return NULL;
+       }
+
+       py_ret = self->state.result->obj;
+       self->state.result->obj = NULL;
+       TALLOC_FREE(self->state.result);
+       return py_ret;
+}
+
+static PyObject *py_ldb_search_iterator_abandon(PyLdbSearchIteratorObject *self,
+               PyObject *Py_UNUSED(ignored))
+{
+       if (self->state.req == NULL) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               "ldb.SearchIterator request already finished");
+               return NULL;
+       }
+
+       Py_XDECREF(self->state.exception);
+       TALLOC_FREE(self->mem_ctx);
+       ZERO_STRUCT(self->state);
+       Py_RETURN_NONE;
+}
+
+static PyMethodDef py_ldb_search_iterator_methods[] = {
+       { "result", (PyCFunction)py_ldb_search_iterator_result, METH_NOARGS,
+               "S.result() -> ldb.Result (without msgs and referrals)\n" },
+       { "abandon", (PyCFunction)py_ldb_search_iterator_abandon, METH_NOARGS,
+               "S.abandon()\n" },
+       { NULL }
+};
+
+static PyObject *py_ldb_search_iterator_repr(PyLdbSearchIteratorObject *self)
+{
+       return PyUnicode_FromString("<ldb search iterator>");
+}
+
+static PyTypeObject PyLdbSearchIterator = {
+       .tp_name = "ldb.SearchIterator",
+       .tp_repr = (reprfunc)py_ldb_search_iterator_repr,
+       .tp_dealloc = (destructor)py_ldb_search_iterator_dealloc,
+       .tp_iter = PyObject_SelfIter,
+       .tp_iternext = (iternextfunc)py_ldb_search_iterator_next,
+       .tp_methods = py_ldb_search_iterator_methods,
+       .tp_basicsize = sizeof(PyLdbSearchIteratorObject),
+       .tp_doc = "LDB search_iterator.",
+       .tp_flags = Py_TPFLAGS_DEFAULT|Py_TPFLAGS_BASETYPE,
+};
+
 static PyObject *py_ldb_module_repr(PyLdbModuleObject *self)
 {
-       return PyString_FromFormat("<ldb module '%s'>",
+       return PyStr_FromFormat("<ldb module '%s'>",
                pyldb_Module_AsModule(self)->ops->name);
 }
 
 static PyObject *py_ldb_module_str(PyLdbModuleObject *self)
 {
-       return PyString_FromString(pyldb_Module_AsModule(self)->ops->name);
+       return PyUnicode_FromString(pyldb_Module_AsModule(self)->ops->name);
 }
 
-static PyObject *py_ldb_module_start_transaction(PyLdbModuleObject *self)
+static PyObject *py_ldb_module_start_transaction(PyLdbModuleObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        pyldb_Module_AsModule(self)->ops->start_transaction(pyldb_Module_AsModule(self));
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_module_end_transaction(PyLdbModuleObject *self)
+static PyObject *py_ldb_module_end_transaction(PyLdbModuleObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        pyldb_Module_AsModule(self)->ops->end_transaction(pyldb_Module_AsModule(self));
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_module_del_transaction(PyLdbModuleObject *self)
+static PyObject *py_ldb_module_del_transaction(PyLdbModuleObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        pyldb_Module_AsModule(self)->ops->del_transaction(pyldb_Module_AsModule(self));
        Py_RETURN_NONE;
@@ -2176,7 +2816,7 @@ static PyObject *py_ldb_module_search(PyLdbModuleObject *self, PyObject *args, P
        if (py_attrs == Py_None) {
                attrs = NULL;
        } else {
-               attrs = PyList_AsStringList(NULL, py_attrs, "attrs");
+               attrs = PyList_AsStrList(NULL, py_attrs, "attrs");
                if (attrs == NULL)
                        return NULL;
        }
@@ -2290,7 +2930,8 @@ static PyObject *py_ldb_module_rename(PyLdbModuleObject *self, PyObject *args)
 }
 
 static PyMethodDef py_ldb_module_methods[] = {
-       { "search", (PyCFunction)py_ldb_module_search, METH_VARARGS|METH_KEYWORDS, NULL },
+       { "search", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_module_search),
+               METH_VARARGS|METH_KEYWORDS, NULL },
        { "add", (PyCFunction)py_ldb_module_add, METH_VARARGS, NULL },
        { "modify", (PyCFunction)py_ldb_module_modify, METH_VARARGS, NULL },
        { "rename", (PyCFunction)py_ldb_module_rename, METH_VARARGS, NULL },
@@ -2340,6 +2981,9 @@ static struct ldb_message_element *PyObject_AsMessageElement(
                                                      const char *attr_name)
 {
        struct ldb_message_element *me;
+       const char *msg = NULL;
+       Py_ssize_t size;
+       int result;
 
        if (pyldb_MessageElement_Check(set_obj)) {
                PyLdbMessageElementObject *set_obj_as_me = (PyLdbMessageElementObject *)set_obj;
@@ -2359,28 +3003,58 @@ static struct ldb_message_element *PyObject_AsMessageElement(
 
        me->name = talloc_strdup(me, attr_name);
        me->flags = flags;
-       if (PyString_Check(set_obj)) {
+       if (PyBytes_Check(set_obj) || PyUnicode_Check(set_obj)) {
                me->num_values = 1;
                me->values = talloc_array(me, struct ldb_val, me->num_values);
-               me->values[0].length = PyString_Size(set_obj);
-               me->values[0].data = talloc_memdup(me, 
-                       (uint8_t *)PyString_AsString(set_obj), me->values[0].length+1);
+               if (PyBytes_Check(set_obj)) {
+                       char *_msg = NULL;
+                       result = PyBytes_AsStringAndSize(set_obj, &_msg, &size);
+                       if (result != 0) {
+                               talloc_free(me);
+                               return NULL;
+                       }
+                       msg = _msg;
+               } else {
+                       msg = PyStr_AsUTF8AndSize(set_obj, &size);
+                       if (msg == NULL) {
+                               talloc_free(me);
+                               return NULL;
+                       }
+               }
+               me->values[0].data = talloc_memdup(me,
+                                                  (const uint8_t *)msg,
+                                                  size+1);
+               me->values[0].length = size;
        } else if (PySequence_Check(set_obj)) {
                Py_ssize_t i;
                me->num_values = PySequence_Size(set_obj);
                me->values = talloc_array(me, struct ldb_val, me->num_values);
                for (i = 0; i < me->num_values; i++) {
                        PyObject *obj = PySequence_GetItem(set_obj, i);
-                       if (!PyString_Check(obj)) {
+                       if (PyBytes_Check(obj)) {
+                               char *_msg = NULL;
+                               result = PyBytes_AsStringAndSize(obj, &_msg, &size);
+                               if (result != 0) {
+                                       talloc_free(me);
+                                       return NULL;
+                               }
+                               msg = _msg;
+                       } else if (PyUnicode_Check(obj)) {
+                               msg = PyStr_AsUTF8AndSize(obj, &size);
+                               if (msg == NULL) {
+                                       talloc_free(me);
+                                       return NULL;
+                               }
+                       } else {
                                PyErr_Format(PyExc_TypeError,
                                             "Expected string as element %zd in list", i);
                                talloc_free(me);
                                return NULL;
                        }
-
-                       me->values[i].length = PyString_Size(obj);
-                       me->values[i].data = talloc_memdup(me, 
-                               (uint8_t *)PyString_AsString(obj), me->values[i].length+1);
+                       me->values[i].data = talloc_memdup(me,
+                                                          (const uint8_t *)msg,
+                                                          size+1);
+                       me->values[i].length = size;
                }
        } else {
                PyErr_Format(PyExc_TypeError,
@@ -2458,7 +3132,7 @@ static PyObject *py_ldb_msg_element_find(PyLdbMessageElementObject *self, Py_ssi
                PyErr_SetString(PyExc_IndexError, "Out of range");
                return NULL;
        }
-       return PyString_FromStringAndSize((char *)el->values[idx].data, el->values[idx].length);
+       return PyLdbBytes_FromStringAndSize((char *)el->values[idx].data, el->values[idx].length);
 }
 
 static PySequenceMethods py_ldb_msg_element_seq = {
@@ -2466,11 +3140,16 @@ static PySequenceMethods py_ldb_msg_element_seq = {
        .sq_item = (ssizeargfunc)py_ldb_msg_element_find,
 };
 
-static int py_ldb_msg_element_cmp(PyLdbMessageElementObject *self, PyLdbMessageElementObject *other)
+static PyObject *py_ldb_msg_element_richcmp(PyObject *self, PyObject *other, int op)
 {
-       int ret = ldb_msg_element_compare(pyldb_MessageElement_AsMessageElement(self),
+       int ret;
+       if (!pyldb_MessageElement_Check(other)) {
+               Py_INCREF(Py_NotImplemented);
+               return Py_NotImplemented;
+       }
+       ret = ldb_msg_element_compare(pyldb_MessageElement_AsMessageElement(self),
                                                                          pyldb_MessageElement_AsMessageElement(other));
-       return SIGN(ret);
+       return richcmp(ret, op);
 }
 
 static PyObject *py_ldb_msg_element_iter(PyLdbMessageElementObject *self)
@@ -2508,6 +3187,9 @@ static PyObject *py_ldb_msg_element_new(PyTypeObject *type, PyObject *args, PyOb
        const char * const kwnames[] = { "elements", "flags", "name", NULL };
        PyLdbMessageElementObject *ret;
        TALLOC_CTX *mem_ctx;
+       const char *msg = NULL;
+       Py_ssize_t size;
+       int result;
 
        if (!PyArg_ParseTupleAndKeywords(args, kwargs, "|OIs",
                                         discard_const_p(char *, kwnames),
@@ -2529,7 +3211,8 @@ static PyObject *py_ldb_msg_element_new(PyTypeObject *type, PyObject *args, PyOb
 
        if (py_elements != NULL) {
                Py_ssize_t i;
-               if (PyString_Check(py_elements)) {
+               if (PyBytes_Check(py_elements) || PyUnicode_Check(py_elements)) {
+                       char *_msg = NULL;
                        el->num_values = 1;
                        el->values = talloc_array(el, struct ldb_val, 1);
                        if (el->values == NULL) {
@@ -2537,9 +3220,20 @@ static PyObject *py_ldb_msg_element_new(PyTypeObject *type, PyObject *args, PyOb
                                PyErr_NoMemory();
                                return NULL;
                        }
-                       el->values[0].length = PyString_Size(py_elements);
+                       if (PyBytes_Check(py_elements)) {
+                               result = PyBytes_AsStringAndSize(py_elements, &_msg, &size);
+                               msg = _msg;
+                       } else {
+                               msg = PyStr_AsUTF8AndSize(py_elements, &size);
+                               result = (msg == NULL) ? -1 : 0;
+                       }
+                       if (result != 0) {
+                               talloc_free(mem_ctx);
+                               return NULL;
+                       }
                        el->values[0].data = talloc_memdup(el->values, 
-                               (uint8_t *)PyString_AsString(py_elements), el->values[0].length+1);
+                               (const uint8_t *)msg, size + 1);
+                       el->values[0].length = size;
                } else if (PySequence_Check(py_elements)) {
                        el->num_values = PySequence_Size(py_elements);
                        el->values = talloc_array(el, struct ldb_val, el->num_values);
@@ -2554,15 +3248,25 @@ static PyObject *py_ldb_msg_element_new(PyTypeObject *type, PyObject *args, PyOb
                                        talloc_free(mem_ctx);
                                        return NULL;
                                }
-                               if (!PyString_Check(item)) {
+                               if (PyBytes_Check(item)) {
+                                       char *_msg = NULL;
+                                       result = PyBytes_AsStringAndSize(item, &_msg, &size);
+                                       msg = _msg;
+                               } else if (PyUnicode_Check(item)) {
+                                       msg = PyStr_AsUTF8AndSize(item, &size);
+                                       result = (msg == NULL) ? -1 : 0;
+                               } else {
                                        PyErr_Format(PyExc_TypeError, 
                                                     "Expected string as element %zd in list", i);
+                                       result = -1;
+                               }
+                               if (result != 0) {
                                        talloc_free(mem_ctx);
                                        return NULL;
                                }
-                               el->values[i].length = PyString_Size(item);
                                el->values[i].data = talloc_memdup(el,
-                                       (uint8_t *)PyString_AsString(item), el->values[i].length+1);
+                                       (const uint8_t *)msg, size+1);
+                               el->values[i].length = size;
                        }
                } else {
                        PyErr_SetString(PyExc_TypeError, 
@@ -2597,17 +3301,17 @@ static PyObject *py_ldb_msg_element_repr(PyLdbMessageElementObject *self)
                PyObject *o = py_ldb_msg_element_find(self, i);
                repr = PyObject_Repr(o);
                if (element_str == NULL)
-                       element_str = talloc_strdup(NULL, PyString_AsString(repr));
+                       element_str = talloc_strdup(NULL, PyStr_AsUTF8(repr));
                else
-                       element_str = talloc_asprintf_append(element_str, ",%s", PyString_AsString(repr));
+                       element_str = talloc_asprintf_append(element_str, ",%s", PyStr_AsUTF8(repr));
                Py_DECREF(repr);
        }
 
        if (element_str != NULL) {
-               ret = PyString_FromFormat("MessageElement([%s])", element_str);
+               ret = PyStr_FromFormat("MessageElement([%s])", element_str);
                talloc_free(element_str);
        } else {
-               ret = PyString_FromString("MessageElement([])");
+               ret = PyUnicode_FromString("MessageElement([])");
        }
 
        return ret;
@@ -2618,7 +3322,7 @@ static PyObject *py_ldb_msg_element_str(PyLdbMessageElementObject *self)
        struct ldb_message_element *el = pyldb_MessageElement_AsMessageElement(self);
 
        if (el->num_values == 1)
-               return PyString_FromStringAndSize((char *)el->values[0].data, el->values[0].length);
+               return PyStr_FromStringAndSize((char *)el->values[0].data, el->values[0].length);
        else
                Py_RETURN_NONE;
 }
@@ -2629,6 +3333,19 @@ static void py_ldb_msg_element_dealloc(PyLdbMessageElementObject *self)
        PyObject_Del(self);
 }
 
+static PyObject *py_ldb_msg_element_get_text(PyObject *self, void *closure)
+{
+       return wrap_text("MessageElementTextWrapper", self);
+}
+
+static PyGetSetDef py_ldb_msg_element_getset[] = {
+       {
+               .name = discard_const_p(char, "text"),
+               .get  = (getter)py_ldb_msg_element_get_text,
+       },
+       { .name = NULL }
+};
+
 static PyTypeObject PyLdbMessageElement = {
        .tp_name = "ldb.MessageElement",
        .tp_basicsize = sizeof(PyLdbMessageElementObject),
@@ -2636,7 +3353,8 @@ static PyTypeObject PyLdbMessageElement = {
        .tp_repr = (reprfunc)py_ldb_msg_element_repr,
        .tp_str = (reprfunc)py_ldb_msg_element_str,
        .tp_methods = py_ldb_msg_element_methods,
-       .tp_compare = (cmpfunc)py_ldb_msg_element_cmp,
+       .tp_getset = py_ldb_msg_element_getset,
+       .tp_richcompare = (richcmpfunc)py_ldb_msg_element_richcmp,
        .tp_iter = (getiterfunc)py_ldb_msg_element_iter,
        .tp_as_sequence = &py_ldb_msg_element_seq,
        .tp_new = py_ldb_msg_element_new,
@@ -2699,17 +3417,18 @@ static PyObject *py_ldb_msg_remove_attr(PyLdbMessageObject *self, PyObject *args
        Py_RETURN_NONE;
 }
 
-static PyObject *py_ldb_msg_keys(PyLdbMessageObject *self)
+static PyObject *py_ldb_msg_keys(PyLdbMessageObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_message *msg = pyldb_Message_AsMessage(self);
        Py_ssize_t i, j = 0;
        PyObject *obj = PyList_New(msg->num_elements+(msg->dn != NULL?1:0));
        if (msg->dn != NULL) {
-               PyList_SetItem(obj, j, PyString_FromString("dn"));
+               PyList_SetItem(obj, j, PyUnicode_FromString("dn"));
                j++;
        }
        for (i = 0; i < msg->num_elements; i++) {
-               PyList_SetItem(obj, j, PyString_FromString(msg->elements[i].name));
+               PyList_SetItem(obj, j, PyUnicode_FromString(msg->elements[i].name));
                j++;
        }
        return obj;
@@ -2718,13 +3437,13 @@ static PyObject *py_ldb_msg_keys(PyLdbMessageObject *self)
 static PyObject *py_ldb_msg_getitem_helper(PyLdbMessageObject *self, PyObject *py_name)
 {
        struct ldb_message_element *el;
-       char *name;
+       const char *name;
        struct ldb_message *msg = pyldb_Message_AsMessage(self);
-       if (!PyString_Check(py_name)) {
+       name = PyStr_AsUTF8(py_name);
+       if (name == NULL) {
                PyErr_SetNone(PyExc_TypeError);
                return NULL;
        }
-       name = PyString_AsString(py_name);
        if (!ldb_attr_cmp(name, "dn"))
                return pyldb_Dn_FromDn(msg->dn);
        el = ldb_msg_find_element(msg, name);
@@ -2779,24 +3498,53 @@ static PyObject *py_ldb_msg_get(PyLdbMessageObject *self, PyObject *args, PyObje
        return PyObject_FromLdbValue(&el->values[idx]);
 }
 
-static PyObject *py_ldb_msg_items(PyLdbMessageObject *self)
+static PyObject *py_ldb_msg_items(PyLdbMessageObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_message *msg = pyldb_Message_AsMessage(self);
        Py_ssize_t i, j = 0;
        PyObject *l = PyList_New(msg->num_elements + (msg->dn == NULL?0:1));
+       if (l == NULL) {
+               return PyErr_NoMemory();
+       }
        if (msg->dn != NULL) {
-               PyList_SetItem(l, 0, Py_BuildValue("(sO)", "dn", pyldb_Dn_FromDn(msg->dn)));
+               PyObject *value = NULL;
+               PyObject *obj = pyldb_Dn_FromDn(msg->dn);
+               int res = 0;
+               value = Py_BuildValue("(sO)", "dn", obj);
+               Py_CLEAR(obj);
+               if (value == NULL) {
+                       Py_CLEAR(l);
+                       return NULL;
+               }
+               res = PyList_SetItem(l, 0, value);
+               if (res == -1) {
+                       Py_CLEAR(l);
+                       return NULL;
+               }
                j++;
        }
        for (i = 0; i < msg->num_elements; i++, j++) {
+               PyObject *value = NULL;
                PyObject *py_el = PyLdbMessageElement_FromMessageElement(&msg->elements[i], msg->elements);
-               PyObject *value = Py_BuildValue("(sO)", msg->elements[i].name, py_el);
-               PyList_SetItem(l, j, value);
+               int res = 0;
+               Py_CLEAR(py_el);
+               value = Py_BuildValue("(sO)", msg->elements[i].name, py_el);
+               if (value == NULL ) {
+                       Py_CLEAR(l);
+                       return NULL;
+               }
+               res = PyList_SetItem(l, 0, value);
+               if (res == -1) {
+                       Py_CLEAR(l);
+                       return NULL;
+               }
        }
        return l;
 }
 
-static PyObject *py_ldb_msg_elements(PyLdbMessageObject *self)
+static PyObject *py_ldb_msg_elements(PyLdbMessageObject *self,
+               PyObject *Py_UNUSED(ignored))
 {
        struct ldb_message *msg = pyldb_Message_AsMessage(self);
        Py_ssize_t i = 0;
@@ -2823,7 +3571,11 @@ static PyObject *py_ldb_msg_add(PyLdbMessageObject *self, PyObject *args)
                PyErr_SetString(PyExc_ValueError, "Invalid MessageElement object");
                return NULL;
        }
-
+       if (el->name == NULL) {
+               PyErr_SetString(PyExc_ValueError,
+                               "The element has no name");
+               return NULL;
+       }
        ret = ldb_msg_add_empty(msg, el->name, el->flags, &el_new);
        PyErr_LDB_ERROR_IS_ERR_RAISE(PyExc_LdbError, ret, NULL);
 
@@ -2852,13 +3604,14 @@ static PyMethodDef py_ldb_msg_methods[] = {
                "Message.from_dict(ldb, dict, mod_flag=FLAG_MOD_REPLACE) -> ldb.Message\n"
                "Class method to create ldb.Message object from Dictionary.\n"
                "mod_flag is one of FLAG_MOD_ADD, FLAG_MOD_REPLACE or FLAG_MOD_DELETE."},
-       { "keys", (PyCFunction)py_ldb_msg_keys, METH_NOARGS, 
+       { "keys", (PyCFunction)py_ldb_msg_keys, METH_NOARGS,
                "S.keys() -> list\n\n"
                "Return sequence of all attribute names." },
        { "remove", (PyCFunction)py_ldb_msg_remove_attr, METH_VARARGS, 
                "S.remove(name)\n\n"
                "Remove all entries for attributes with the specified name."},
-       { "get", (PyCFunction)py_ldb_msg_get, METH_VARARGS | METH_KEYWORDS,
+       { "get", PY_DISCARD_FUNC_SIG(PyCFunction, py_ldb_msg_get),
+               METH_VARARGS | METH_KEYWORDS,
          "msg.get(name,default=None,idx=None) -> string\n"
          "idx is the index into the values array\n"
          "if idx is None, then a list is returned\n"
@@ -2876,7 +3629,7 @@ static PyObject *py_ldb_msg_iter(PyLdbMessageObject *self)
 {
        PyObject *list, *iter;
 
-       list = py_ldb_msg_keys(self);
+       list = py_ldb_msg_keys(self, NULL);
        iter = PyObject_GetIter(list);
        Py_DECREF(list);
        return iter;
@@ -2884,14 +3637,14 @@ static PyObject *py_ldb_msg_iter(PyLdbMessageObject *self)
 
 static int py_ldb_msg_setitem(PyLdbMessageObject *self, PyObject *name, PyObject *value)
 {
-       char *attr_name;
+       const char *attr_name;
 
-       if (!PyString_Check(name)) {
+       attr_name = PyStr_AsUTF8(name);
+       if (attr_name == NULL) {
                PyErr_SetNone(PyExc_TypeError);
                return -1;
        }
 
-       attr_name = PyString_AsString(name);
        if (value == NULL) {
                /* delitem */
                ldb_msg_remove_attr(self->msg, attr_name);
@@ -3002,9 +3755,22 @@ static int py_ldb_msg_set_dn(PyLdbMessageObject *self, PyObject *value, void *cl
        return 0;
 }
 
+static PyObject *py_ldb_msg_get_text(PyObject *self, void *closure)
+{
+       return wrap_text("MessageTextWrapper", self);
+}
+
 static PyGetSetDef py_ldb_msg_getset[] = {
-       { discard_const_p(char, "dn"), (getter)py_ldb_msg_get_dn, (setter)py_ldb_msg_set_dn, NULL },
-       { NULL }
+       {
+               .name = discard_const_p(char, "dn"),
+               .get  = (getter)py_ldb_msg_get_dn,
+               .set  = (setter)py_ldb_msg_set_dn,
+       },
+       {
+               .name = discard_const_p(char, "text"),
+               .get  = (getter)py_ldb_msg_get_text,
+       },
+       { .name = NULL },
 };
 
 static PyObject *py_ldb_msg_repr(PyLdbMessageObject *self)
@@ -3017,7 +3783,7 @@ static PyObject *py_ldb_msg_repr(PyLdbMessageObject *self)
                Py_DECREF(dict);
                return NULL;
        }
-       ret = PyString_FromFormat("Message(%s)", PyString_AsString(repr));
+       ret = PyStr_FromFormat("Message(%s)", PyStr_AsUTF8(repr));
        Py_DECREF(repr);
        Py_DECREF(dict);
        return ret;
@@ -3029,41 +3795,48 @@ static void py_ldb_msg_dealloc(PyLdbMessageObject *self)
        PyObject_Del(self);
 }
 
-static int py_ldb_msg_compare(PyLdbMessageObject *py_msg1,
-                             PyLdbMessageObject *py_msg2)
+static PyObject *py_ldb_msg_richcmp(PyLdbMessageObject *py_msg1,
+                             PyLdbMessageObject *py_msg2, int op)
 {
-       struct ldb_message *msg1 = pyldb_Message_AsMessage(py_msg1),
-                          *msg2 = pyldb_Message_AsMessage(py_msg2);
+       struct ldb_message *msg1, *msg2;
        unsigned int i;
        int ret;
 
+       if (!PyLdbMessage_Check(py_msg2)) {
+               Py_INCREF(Py_NotImplemented);
+               return Py_NotImplemented;
+       }
+
+       msg1 = pyldb_Message_AsMessage(py_msg1),
+       msg2 = pyldb_Message_AsMessage(py_msg2);
+
        if ((msg1->dn != NULL) || (msg2->dn != NULL)) {
                ret = ldb_dn_compare(msg1->dn, msg2->dn);
                if (ret != 0) {
-                       return SIGN(ret);
+                       return richcmp(ret, op);
                }
        }
 
        ret = msg1->num_elements - msg2->num_elements;
        if (ret != 0) {
-               return SIGN(ret);
+               return richcmp(ret, op);
        }
 
        for (i = 0; i < msg1->num_elements; i++) {
                ret = ldb_msg_element_compare_name(&msg1->elements[i],
                                                   &msg2->elements[i]);
                if (ret != 0) {
-                       return SIGN(ret);
+                       return richcmp(ret, op);
                }
 
                ret = ldb_msg_element_compare(&msg1->elements[i],
                                              &msg2->elements[i]);
                if (ret != 0) {
-                       return SIGN(ret);
+                       return richcmp(ret, op);
                }
        }
 
-       return 0;
+       return richcmp(0, op);
 }
 
 static PyTypeObject PyLdbMessage = {
@@ -3077,7 +3850,7 @@ static PyTypeObject PyLdbMessage = {
        .tp_repr = (reprfunc)py_ldb_msg_repr,
        .tp_flags = Py_TPFLAGS_DEFAULT,
        .tp_iter = (getiterfunc)py_ldb_msg_iter,
-       .tp_compare = (cmpfunc)py_ldb_msg_compare,
+       .tp_richcompare = (richcmpfunc)py_ldb_msg_richcmp,
        .tp_doc = "A LDB Message",
 };
 
@@ -3133,7 +3906,7 @@ static int py_module_search(struct ldb_module *mod, struct ldb_request *req)
                for (len = 0; req->op.search.attrs[len]; len++);
                py_attrs = PyList_New(len);
                for (i = 0; i < len; i++)
-                       PyList_SetItem(py_attrs, i, PyString_FromString(req->op.search.attrs[i]));
+                       PyList_SetItem(py_attrs, i, PyUnicode_FromString(req->op.search.attrs[i]));
        }
 
        py_result = PyObject_CallMethod(py_ldb, discard_const_p(char, "search"),
@@ -3381,18 +4154,21 @@ static PyObject *py_register_module(PyObject *module, PyObject *args)
        int ret;
        struct ldb_module_ops *ops;
        PyObject *input;
+       PyObject *tmp;
 
        if (!PyArg_ParseTuple(args, "O", &input))
                return NULL;
 
-       ops = talloc_zero(talloc_autofree_context(), struct ldb_module_ops);
+       ops = talloc_zero(NULL, struct ldb_module_ops);
        if (ops == NULL) {
                PyErr_NoMemory();
                return NULL;
        }
 
-       ops->name = talloc_strdup(ops, PyString_AsString(PyObject_GetAttrString(input, discard_const_p(char, "name"))));
+       tmp = PyObject_GetAttrString(input, discard_const_p(char, "name"));
+       ops->name = talloc_strdup(ops, PyStr_AsUTF8(tmp));
 
+       Py_XDECREF(tmp);
        Py_INCREF(input);
        ops->private_data = input;
        ops->init_context = py_module_init;
@@ -3408,6 +4184,9 @@ static PyObject *py_register_module(PyObject *module, PyObject *args)
        ops->del_transaction = py_module_del_transaction;
 
        ret = ldb_register_module(ops);
+       if (ret != LDB_SUCCESS) {
+               TALLOC_FREE(ops);
+       }
 
        PyErr_LDB_ERROR_IS_ERR_RAISE(PyExc_LdbError, ret, NULL);
 
@@ -3424,7 +4203,7 @@ static PyObject *py_timestring(PyObject *module, PyObject *args)
        if (!PyArg_ParseTuple(args, "l", &t_val))
                return NULL;
        tresult = ldb_timestring(NULL, (time_t) t_val);
-       ret = PyString_FromString(tresult);
+       ret = PyUnicode_FromString(tresult);
        talloc_free(tresult);
        return ret;
 }
@@ -3452,7 +4231,7 @@ static PyObject *py_valid_attr_name(PyObject *self, PyObject *args)
 static PyObject *py_binary_encode(PyObject *self, PyObject *args)
 {
        char *str, *encoded;
-       int size = 0;
+       Py_ssize_t size = 0;
        struct ldb_val val;
        PyObject *ret;
 
@@ -3466,7 +4245,7 @@ static PyObject *py_binary_encode(PyObject *self, PyObject *args)
                PyErr_SetString(PyExc_TypeError, "unable to encode binary string");
                return NULL;
        }
-       ret = PyString_FromString(encoded);
+       ret = PyUnicode_FromString(encoded);
        talloc_free(encoded);
        return ret;
 }
@@ -3488,7 +4267,7 @@ static PyObject *py_binary_decode(PyObject *self, PyObject *args)
                PyErr_SetString(PyExc_TypeError, "unable to decode binary string");
                return NULL;
        }
-       ret = Py_BuildValue("s#", val.data, val.length);
+       ret = PyBytes_FromStringAndSize((const char*)val.data, val.length);
        talloc_free(val.data);
        return ret;
 }
@@ -3506,7 +4285,8 @@ static PyMethodDef py_ldb_global_methods[] = {
        { "valid_attr_name", py_valid_attr_name, METH_VARARGS,
                "S.valid_attr_name(name) -> bool\n\nn"
                "Check whether the supplied name is a valid attribute name." },
-       { "open", (PyCFunction)py_ldb_new, METH_VARARGS|METH_KEYWORDS,
+       { "open", PY_DISCARD_FUNC_SIG(PyCFunction,py_ldb_new),
+               METH_VARARGS|METH_KEYWORDS,
                "S.open() -> Ldb\n\n"
                "Open a new LDB context." },
        { "binary_encode", py_binary_encode, METH_VARARGS,
@@ -3518,102 +4298,141 @@ static PyMethodDef py_ldb_global_methods[] = {
        { NULL }
 };
 
-void initldb(void)
+#define MODULE_DOC "An interface to LDB, a LDAP-like API that can either to talk an embedded database (TDB-based) or a standards-compliant LDAP server."
+
+#if PY_MAJOR_VERSION >= 3
+static struct PyModuleDef moduledef = {
+       PyModuleDef_HEAD_INIT,
+       .m_name = "ldb",
+       .m_doc = MODULE_DOC,
+       .m_size = -1,
+       .m_methods = py_ldb_global_methods,
+};
+#endif
+
+static PyObject* module_init(void)
 {
        PyObject *m;
 
+       PyLdbBytesType.tp_base = &PyBytes_Type;
+       if (PyType_Ready(&PyLdbBytesType) < 0) {
+               return NULL;
+       }
+
        if (PyType_Ready(&PyLdbDn) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdbMessage) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdbMessageElement) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdb) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdbModule) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdbTree) < 0)
-               return;
+               return NULL;
 
        if (PyType_Ready(&PyLdbResult) < 0)
-               return;
+               return NULL;
+
+       if (PyType_Ready(&PyLdbSearchIterator) < 0)
+               return NULL;
 
        if (PyType_Ready(&PyLdbControl) < 0)
-               return;
+               return NULL;
 
-       m = Py_InitModule3("ldb", py_ldb_global_methods, 
-               "An interface to LDB, a LDAP-like API that can either to talk an embedded database (TDB-based) or a standards-compliant LDAP server.");
+#if PY_MAJOR_VERSION >= 3
+       m = PyModule_Create(&moduledef);
+#else
+       m = Py_InitModule3("ldb", py_ldb_global_methods, MODULE_DOC);
+#endif
        if (m == NULL)
-               return;
-
-       PyModule_AddObject(m, "SEQ_HIGHEST_SEQ", PyInt_FromLong(LDB_SEQ_HIGHEST_SEQ));
-       PyModule_AddObject(m, "SEQ_HIGHEST_TIMESTAMP", PyInt_FromLong(LDB_SEQ_HIGHEST_TIMESTAMP));
-       PyModule_AddObject(m, "SEQ_NEXT", PyInt_FromLong(LDB_SEQ_NEXT));
-       PyModule_AddObject(m, "SCOPE_DEFAULT", PyInt_FromLong(LDB_SCOPE_DEFAULT));
-       PyModule_AddObject(m, "SCOPE_BASE", PyInt_FromLong(LDB_SCOPE_BASE));
-       PyModule_AddObject(m, "SCOPE_ONELEVEL", PyInt_FromLong(LDB_SCOPE_ONELEVEL));
-       PyModule_AddObject(m, "SCOPE_SUBTREE", PyInt_FromLong(LDB_SCOPE_SUBTREE));
-
-       PyModule_AddObject(m, "CHANGETYPE_NONE", PyInt_FromLong(LDB_CHANGETYPE_NONE));
-       PyModule_AddObject(m, "CHANGETYPE_ADD", PyInt_FromLong(LDB_CHANGETYPE_ADD));
-       PyModule_AddObject(m, "CHANGETYPE_DELETE", PyInt_FromLong(LDB_CHANGETYPE_DELETE));
-       PyModule_AddObject(m, "CHANGETYPE_MODIFY", PyInt_FromLong(LDB_CHANGETYPE_MODIFY));
-
-       PyModule_AddObject(m, "FLAG_MOD_ADD", PyInt_FromLong(LDB_FLAG_MOD_ADD));
-       PyModule_AddObject(m, "FLAG_MOD_REPLACE", PyInt_FromLong(LDB_FLAG_MOD_REPLACE));
-       PyModule_AddObject(m, "FLAG_MOD_DELETE", PyInt_FromLong(LDB_FLAG_MOD_DELETE));
-
-       PyModule_AddObject(m, "SUCCESS", PyInt_FromLong(LDB_SUCCESS));
-       PyModule_AddObject(m, "ERR_OPERATIONS_ERROR", PyInt_FromLong(LDB_ERR_OPERATIONS_ERROR));
-       PyModule_AddObject(m, "ERR_PROTOCOL_ERROR", PyInt_FromLong(LDB_ERR_PROTOCOL_ERROR));
-       PyModule_AddObject(m, "ERR_TIME_LIMIT_EXCEEDED", PyInt_FromLong(LDB_ERR_TIME_LIMIT_EXCEEDED));
-       PyModule_AddObject(m, "ERR_SIZE_LIMIT_EXCEEDED", PyInt_FromLong(LDB_ERR_SIZE_LIMIT_EXCEEDED));
-       PyModule_AddObject(m, "ERR_COMPARE_FALSE", PyInt_FromLong(LDB_ERR_COMPARE_FALSE));
-       PyModule_AddObject(m, "ERR_COMPARE_TRUE", PyInt_FromLong(LDB_ERR_COMPARE_TRUE));
-       PyModule_AddObject(m, "ERR_AUTH_METHOD_NOT_SUPPORTED", PyInt_FromLong(LDB_ERR_AUTH_METHOD_NOT_SUPPORTED));
-       PyModule_AddObject(m, "ERR_STRONG_AUTH_REQUIRED", PyInt_FromLong(LDB_ERR_STRONG_AUTH_REQUIRED));
-       PyModule_AddObject(m, "ERR_REFERRAL", PyInt_FromLong(LDB_ERR_REFERRAL));
-       PyModule_AddObject(m, "ERR_ADMIN_LIMIT_EXCEEDED", PyInt_FromLong(LDB_ERR_ADMIN_LIMIT_EXCEEDED));
-       PyModule_AddObject(m, "ERR_UNSUPPORTED_CRITICAL_EXTENSION", PyInt_FromLong(LDB_ERR_UNSUPPORTED_CRITICAL_EXTENSION));
-       PyModule_AddObject(m, "ERR_CONFIDENTIALITY_REQUIRED", PyInt_FromLong(LDB_ERR_CONFIDENTIALITY_REQUIRED));
-       PyModule_AddObject(m, "ERR_SASL_BIND_IN_PROGRESS", PyInt_FromLong(LDB_ERR_SASL_BIND_IN_PROGRESS));
-       PyModule_AddObject(m, "ERR_NO_SUCH_ATTRIBUTE", PyInt_FromLong(LDB_ERR_NO_SUCH_ATTRIBUTE));
-       PyModule_AddObject(m, "ERR_UNDEFINED_ATTRIBUTE_TYPE", PyInt_FromLong(LDB_ERR_UNDEFINED_ATTRIBUTE_TYPE));
-       PyModule_AddObject(m, "ERR_INAPPROPRIATE_MATCHING", PyInt_FromLong(LDB_ERR_INAPPROPRIATE_MATCHING));
-       PyModule_AddObject(m, "ERR_CONSTRAINT_VIOLATION", PyInt_FromLong(LDB_ERR_CONSTRAINT_VIOLATION));
-       PyModule_AddObject(m, "ERR_ATTRIBUTE_OR_VALUE_EXISTS", PyInt_FromLong(LDB_ERR_ATTRIBUTE_OR_VALUE_EXISTS));
-       PyModule_AddObject(m, "ERR_INVALID_ATTRIBUTE_SYNTAX", PyInt_FromLong(LDB_ERR_INVALID_ATTRIBUTE_SYNTAX));
-       PyModule_AddObject(m, "ERR_NO_SUCH_OBJECT", PyInt_FromLong(LDB_ERR_NO_SUCH_OBJECT));
-       PyModule_AddObject(m, "ERR_ALIAS_PROBLEM", PyInt_FromLong(LDB_ERR_ALIAS_PROBLEM));
-       PyModule_AddObject(m, "ERR_INVALID_DN_SYNTAX", PyInt_FromLong(LDB_ERR_INVALID_DN_SYNTAX));
-       PyModule_AddObject(m, "ERR_ALIAS_DEREFERINCING_PROBLEM", PyInt_FromLong(LDB_ERR_ALIAS_DEREFERENCING_PROBLEM));
-       PyModule_AddObject(m, "ERR_INAPPROPRIATE_AUTHENTICATION", PyInt_FromLong(LDB_ERR_INAPPROPRIATE_AUTHENTICATION));
-       PyModule_AddObject(m, "ERR_INVALID_CREDENTIALS", PyInt_FromLong(LDB_ERR_INVALID_CREDENTIALS));
-       PyModule_AddObject(m, "ERR_INSUFFICIENT_ACCESS_RIGHTS", PyInt_FromLong(LDB_ERR_INSUFFICIENT_ACCESS_RIGHTS));
-       PyModule_AddObject(m, "ERR_BUSY", PyInt_FromLong(LDB_ERR_BUSY));
-       PyModule_AddObject(m, "ERR_UNAVAILABLE", PyInt_FromLong(LDB_ERR_UNAVAILABLE));
-       PyModule_AddObject(m, "ERR_UNWILLING_TO_PERFORM", PyInt_FromLong(LDB_ERR_UNWILLING_TO_PERFORM));
-       PyModule_AddObject(m, "ERR_LOOP_DETECT", PyInt_FromLong(LDB_ERR_LOOP_DETECT));
-       PyModule_AddObject(m, "ERR_NAMING_VIOLATION", PyInt_FromLong(LDB_ERR_NAMING_VIOLATION));
-       PyModule_AddObject(m, "ERR_OBJECT_CLASS_VIOLATION", PyInt_FromLong(LDB_ERR_OBJECT_CLASS_VIOLATION));
-       PyModule_AddObject(m, "ERR_NOT_ALLOWED_ON_NON_LEAF", PyInt_FromLong(LDB_ERR_NOT_ALLOWED_ON_NON_LEAF));
-       PyModule_AddObject(m, "ERR_NOT_ALLOWED_ON_RDN", PyInt_FromLong(LDB_ERR_NOT_ALLOWED_ON_RDN));
-       PyModule_AddObject(m, "ERR_ENTRY_ALREADY_EXISTS", PyInt_FromLong(LDB_ERR_ENTRY_ALREADY_EXISTS));
-       PyModule_AddObject(m, "ERR_OBJECT_CLASS_MODS_PROHIBITED", PyInt_FromLong(LDB_ERR_OBJECT_CLASS_MODS_PROHIBITED));
-       PyModule_AddObject(m, "ERR_AFFECTS_MULTIPLE_DSAS", PyInt_FromLong(LDB_ERR_AFFECTS_MULTIPLE_DSAS));
-       PyModule_AddObject(m, "ERR_OTHER", PyInt_FromLong(LDB_ERR_OTHER));
-
-       PyModule_AddObject(m, "FLG_RDONLY", PyInt_FromLong(LDB_FLG_RDONLY));
-       PyModule_AddObject(m, "FLG_NOSYNC", PyInt_FromLong(LDB_FLG_NOSYNC));
-       PyModule_AddObject(m, "FLG_RECONNECT", PyInt_FromLong(LDB_FLG_RECONNECT));
-       PyModule_AddObject(m, "FLG_NOMMAP", PyInt_FromLong(LDB_FLG_NOMMAP));
-
-       PyModule_AddObject(m, "__docformat__", PyString_FromString("restructuredText"));
+               return NULL;
+
+#define ADD_LDB_INT(val) PyModule_AddIntConstant(m, #val, LDB_ ## val)
+
+       ADD_LDB_INT(SEQ_HIGHEST_SEQ);
+       ADD_LDB_INT(SEQ_HIGHEST_TIMESTAMP);
+       ADD_LDB_INT(SEQ_NEXT);
+       ADD_LDB_INT(SCOPE_DEFAULT);
+       ADD_LDB_INT(SCOPE_BASE);
+       ADD_LDB_INT(SCOPE_ONELEVEL);
+       ADD_LDB_INT(SCOPE_SUBTREE);
+
+       ADD_LDB_INT(CHANGETYPE_NONE);
+       ADD_LDB_INT(CHANGETYPE_ADD);
+       ADD_LDB_INT(CHANGETYPE_DELETE);
+       ADD_LDB_INT(CHANGETYPE_MODIFY);
+
+       ADD_LDB_INT(FLAG_MOD_ADD);
+       ADD_LDB_INT(FLAG_MOD_REPLACE);
+       ADD_LDB_INT(FLAG_MOD_DELETE);
+
+       ADD_LDB_INT(ATTR_FLAG_HIDDEN);
+       ADD_LDB_INT(ATTR_FLAG_UNIQUE_INDEX);
+       ADD_LDB_INT(ATTR_FLAG_SINGLE_VALUE);
+       ADD_LDB_INT(ATTR_FLAG_FORCE_BASE64_LDIF);
+
+       ADD_LDB_INT(SUCCESS);
+       ADD_LDB_INT(ERR_OPERATIONS_ERROR);
+       ADD_LDB_INT(ERR_PROTOCOL_ERROR);
+       ADD_LDB_INT(ERR_TIME_LIMIT_EXCEEDED);
+       ADD_LDB_INT(ERR_SIZE_LIMIT_EXCEEDED);
+       ADD_LDB_INT(ERR_COMPARE_FALSE);
+       ADD_LDB_INT(ERR_COMPARE_TRUE);
+       ADD_LDB_INT(ERR_AUTH_METHOD_NOT_SUPPORTED);
+       ADD_LDB_INT(ERR_STRONG_AUTH_REQUIRED);
+       ADD_LDB_INT(ERR_REFERRAL);
+       ADD_LDB_INT(ERR_ADMIN_LIMIT_EXCEEDED);
+       ADD_LDB_INT(ERR_UNSUPPORTED_CRITICAL_EXTENSION);
+       ADD_LDB_INT(ERR_CONFIDENTIALITY_REQUIRED);
+       ADD_LDB_INT(ERR_SASL_BIND_IN_PROGRESS);
+       ADD_LDB_INT(ERR_NO_SUCH_ATTRIBUTE);
+       ADD_LDB_INT(ERR_UNDEFINED_ATTRIBUTE_TYPE);
+       ADD_LDB_INT(ERR_INAPPROPRIATE_MATCHING);
+       ADD_LDB_INT(ERR_CONSTRAINT_VIOLATION);
+       ADD_LDB_INT(ERR_ATTRIBUTE_OR_VALUE_EXISTS);
+       ADD_LDB_INT(ERR_INVALID_ATTRIBUTE_SYNTAX);
+       ADD_LDB_INT(ERR_NO_SUCH_OBJECT);
+       ADD_LDB_INT(ERR_ALIAS_PROBLEM);
+       ADD_LDB_INT(ERR_INVALID_DN_SYNTAX);
+       ADD_LDB_INT(ERR_ALIAS_DEREFERENCING_PROBLEM);
+       ADD_LDB_INT(ERR_INAPPROPRIATE_AUTHENTICATION);
+       ADD_LDB_INT(ERR_INVALID_CREDENTIALS);
+       ADD_LDB_INT(ERR_INSUFFICIENT_ACCESS_RIGHTS);
+       ADD_LDB_INT(ERR_BUSY);
+       ADD_LDB_INT(ERR_UNAVAILABLE);
+       ADD_LDB_INT(ERR_UNWILLING_TO_PERFORM);
+       ADD_LDB_INT(ERR_LOOP_DETECT);
+       ADD_LDB_INT(ERR_NAMING_VIOLATION);
+       ADD_LDB_INT(ERR_OBJECT_CLASS_VIOLATION);
+       ADD_LDB_INT(ERR_NOT_ALLOWED_ON_NON_LEAF);
+       ADD_LDB_INT(ERR_NOT_ALLOWED_ON_RDN);
+       ADD_LDB_INT(ERR_ENTRY_ALREADY_EXISTS);
+       ADD_LDB_INT(ERR_OBJECT_CLASS_MODS_PROHIBITED);
+       ADD_LDB_INT(ERR_AFFECTS_MULTIPLE_DSAS);
+       ADD_LDB_INT(ERR_OTHER);
+
+       ADD_LDB_INT(FLG_RDONLY);
+       ADD_LDB_INT(FLG_NOSYNC);
+       ADD_LDB_INT(FLG_RECONNECT);
+       ADD_LDB_INT(FLG_NOMMAP);
+       ADD_LDB_INT(FLG_SHOW_BINARY);
+       ADD_LDB_INT(FLG_ENABLE_TRACING);
+       ADD_LDB_INT(FLG_DONT_CREATE_DB);
+
+       ADD_LDB_INT(PACKING_FORMAT);
+       ADD_LDB_INT(PACKING_FORMAT_V2);
+
+       /* Historical misspelling */
+       PyModule_AddIntConstant(m, "ERR_ALIAS_DEREFERINCING_PROBLEM", LDB_ERR_ALIAS_DEREFERENCING_PROBLEM);
+
+       PyModule_AddStringConstant(m, "__docformat__", "restructuredText");
 
        PyExc_LdbError = PyErr_NewException(discard_const_p(char, "_ldb.LdbError"), NULL, NULL);
        PyModule_AddObject(m, "LdbError", PyExc_LdbError);
@@ -3635,16 +4454,33 @@ void initldb(void)
        PyModule_AddObject(m, "Tree", (PyObject *)&PyLdbTree);
        PyModule_AddObject(m, "Control", (PyObject *)&PyLdbControl);
 
-       PyModule_AddObject(m, "__version__", PyString_FromString(PACKAGE_VERSION));
+       PyModule_AddStringConstant(m, "__version__", PACKAGE_VERSION);
 
-#define ADD_LDB_STRING(val)  PyModule_AddObject(m, #val, PyString_FromString(LDB_## val))
+#define ADD_LDB_STRING(val)  PyModule_AddStringConstant(m, #val, LDB_## val)
 
        ADD_LDB_STRING(SYNTAX_DN);
        ADD_LDB_STRING(SYNTAX_DIRECTORY_STRING);
        ADD_LDB_STRING(SYNTAX_INTEGER);
+       ADD_LDB_STRING(SYNTAX_ORDERED_INTEGER);
        ADD_LDB_STRING(SYNTAX_BOOLEAN);
        ADD_LDB_STRING(SYNTAX_OCTET_STRING);
        ADD_LDB_STRING(SYNTAX_UTC_TIME);
        ADD_LDB_STRING(OID_COMPARATOR_AND);
        ADD_LDB_STRING(OID_COMPARATOR_OR);
+
+       return m;
+}
+
+#if PY_MAJOR_VERSION >= 3
+PyMODINIT_FUNC PyInit_ldb(void);
+PyMODINIT_FUNC PyInit_ldb(void)
+{
+       return module_init();
 }
+#else
+void initldb(void);
+void initldb(void)
+{
+       module_init();
+}
+#endif