gensec: clarify memory ownership for gensec_session_info() and gensec_session_key()
[samba.git] / source4 / libnet / py_net.c
index cf81d8070dc239622a995b25339d8c1ee5611bd8..90fa1d56d665ec10841a1c43f042d57393d7bbdf 100644 (file)
-/* 
+/*
    Unix SMB/CIFS implementation.
    Samba utility functions
-   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
-   
+   Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008-2010
+   Copyright (C) Kamen Mazdrashki <kamen.mazdrashki@postpath.com> 2009
+
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.
-   
+
    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
-   
+
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include "includes.h"
 #include <Python.h>
+#include "includes.h"
+#include <ldb.h>
+#include <pyldb.h>
 #include "libnet.h"
-#include "param/param.h"
+#include "auth/credentials/pycredentials.h"
 #include "libcli/security/security.h"
 #include "lib/events/events.h"
+#include "param/pyparam.h"
+#include "auth/gensec/gensec.h"
+#include "librpc/rpc/pyrpc_util.h"
+#include "libcli/finddc.h"
+#include "libcli/resolve/resolve.h"
 
-struct libnet_context *py_net_ctx(PyObject *obj, struct event_context *ev)
-{
-       /* FIXME: Use obj */
-       return libnet_context_init(ev, global_loadparm);
-}
+void initnet(void);
+
+typedef struct {
+       PyObject_HEAD
+       TALLOC_CTX *mem_ctx;
+       struct libnet_context *libnet_ctx;
+       struct tevent_context *ev;
+} py_net_Object;
 
-static PyObject *py_net_join(PyObject *cls, PyObject *args, PyObject *kwargs)
+static PyObject *py_net_join_member(py_net_Object *self, PyObject *args, PyObject *kwargs)
 {
-       struct libnet_Join r;
+       struct libnet_Join_member r;
        NTSTATUS status;
        PyObject *result;
        TALLOC_CTX *mem_ctx;
-       struct event_context *ev;
-       struct libnet_context *libnet_ctx;
-       const char *kwnames[] = { "domain_name", "netbios_name", "join_type", "level", NULL };
+       const char *kwnames[] = { "domain_name", "netbios_name", "level", NULL };
 
-       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssii:Join", discard_const_p(char *, kwnames), 
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "ssi:Join", discard_const_p(char *, kwnames),
                                         &r.in.domain_name, &r.in.netbios_name, 
-                                        &r.in.join_type, &r.in.level))
+                                        &r.in.level))
                return NULL;
 
+       mem_ctx = talloc_new(self->mem_ctx);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_Join_member(self->libnet_ctx, mem_ctx, &r);
+       if (NT_STATUS_IS_ERR(status)) {
+               PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       result = Py_BuildValue("sss", r.out.join_password,
+                              dom_sid_string(mem_ctx, r.out.domain_sid),
+                              r.out.domain_name);
+
+       talloc_free(mem_ctx);
+
+       return result;
+}
+
+static const char py_net_join_member_doc[] = "join_member(domain_name, netbios_name, level) -> (join_password, domain_sid, domain_name)\n\n" \
+"Join the domain with the specified name.";
+
+static PyObject *py_net_change_password(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       union libnet_ChangePassword r;
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       struct tevent_context *ev;
+       const char *kwnames[] = { "newpassword", NULL };
+
+       ZERO_STRUCT(r);
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:change_password",
+                                       discard_const_p(char *, kwnames),
+                                       &r.generic.in.newpassword)) {
+               return NULL;
+       }
+
+       r.generic.level = LIBNET_CHANGE_PASSWORD_GENERIC;
+       r.generic.in.account_name = cli_credentials_get_username(self->libnet_ctx->cred);
+       r.generic.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
+       r.generic.in.oldpassword = cli_credentials_get_password(self->libnet_ctx->cred);
+
        /* FIXME: we really need to get a context from the caller or we may end
         * up with 2 event contexts */
-       ev = event_context_init(NULL);
+       ev = s4_event_context_init(NULL);
+
        mem_ctx = talloc_new(ev);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_ChangePassword(self->libnet_ctx, mem_ctx, &r);
+       if (NT_STATUS_IS_ERR(status)) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       talloc_free(mem_ctx);
+
+       Py_RETURN_NONE;
+}
+
+static const char py_net_change_password_doc[] = "change_password(newpassword) -> True\n\n" \
+"Change password for a user. You must supply credential with enough rights to do this.\n\n" \
+"Sample usage is:\n" \
+"net.set_password(newpassword=<new_password>\n";
+
+
+static PyObject *py_net_set_password(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       union libnet_SetPassword r;
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       struct tevent_context *ev;
+       const char *kwnames[] = { "account_name", "domain_name", "newpassword", NULL };
 
-       libnet_ctx = py_net_ctx(cls, ev);
+       ZERO_STRUCT(r);
 
-       status = libnet_Join(libnet_ctx, mem_ctx, &r);
+       r.generic.level = LIBNET_SET_PASSWORD_GENERIC;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sss:set_password",
+                                       discard_const_p(char *, kwnames),
+                                        &r.generic.in.account_name,
+                                        &r.generic.in.domain_name,
+                                        &r.generic.in.newpassword)) {
+               return NULL;
+       }
+
+       /* FIXME: we really need to get a context from the caller or we may end
+        * up with 2 event contexts */
+       ev = s4_event_context_init(NULL);
+
+       mem_ctx = talloc_new(ev);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_SetPassword(self->libnet_ctx, mem_ctx, &r);
        if (NT_STATUS_IS_ERR(status)) {
-               PyErr_SetString(PyExc_RuntimeError, r.out.error_string);
+               PyErr_SetString(PyExc_RuntimeError,
+                               r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
                talloc_free(mem_ctx);
                return NULL;
        }
 
-       result = Py_BuildValue("sss", r.out.join_password, 
-                              dom_sid_string(mem_ctx, r.out.domain_sid),
-                              r.out.domain_name);
+       talloc_free(mem_ctx);
+
+       Py_RETURN_NONE;
+}
+
+static const char py_net_set_password_doc[] = "set_password(account_name, domain_name, newpassword) -> True\n\n" \
+"Set password for a user. You must supply credential with enough rights to do this.\n\n" \
+"Sample usage is:\n" \
+"net.set_password(account_name=<account_name>,\n" \
+"                domain_name=domain_name,\n" \
+"                newpassword=new_pass)\n";
+
+
+static PyObject *py_net_export_keytab(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       struct libnet_export_keytab r;
+       TALLOC_CTX *mem_ctx;
+       const char *kwnames[] = { "keytab", NULL };
+       NTSTATUS status;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s:export_keytab", discard_const_p(char *, kwnames),
+                                        &r.in.keytab_name)) {
+               return NULL;
+       }
+
+       mem_ctx = talloc_new(self->mem_ctx);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_export_keytab(self->libnet_ctx, mem_ctx, &r);
+       if (NT_STATUS_IS_ERR(status)) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               r.out.error_string?r.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
 
        talloc_free(mem_ctx);
 
-       if (result == NULL)
+       Py_RETURN_NONE;
+}
+
+static const char py_net_export_keytab_doc[] = "export_keytab(keytab, name)\n\n"
+"Export the DC keytab to a keytab file.";
+
+static PyObject *py_net_time(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "server_name", NULL };
+       union libnet_RemoteTOD r;
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       char timestr[64];
+       PyObject *ret;
+       struct tm *tm;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s",
+               discard_const_p(char *, kwnames), &r.generic.in.server_name))
                return NULL;
 
-       return result;
+       r.generic.level                 = LIBNET_REMOTE_TOD_GENERIC;
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_RemoteTOD(self->libnet_ctx, mem_ctx, &r);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               r.generic.out.error_string?r.generic.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       ZERO_STRUCT(timestr);
+       tm = localtime(&r.generic.out.time);
+       strftime(timestr, sizeof(timestr)-1, "%c %Z",tm);
+       
+       ret = PyString_FromString(timestr);
+
+       talloc_free(mem_ctx);
+
+       return ret;
+}
+
+static const char py_net_time_doc[] = "time(server_name) -> timestr\n"
+"Retrieve the remote time on a server";
+
+static PyObject *py_net_user_create(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "username", NULL };
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       struct libnet_CreateUser r;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames), 
+                                                                        &r.in.user_name))
+               return NULL;
+
+       r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_CreateUser(self->libnet_ctx, mem_ctx, &r);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       talloc_free(mem_ctx);
+       
+       Py_RETURN_NONE;
 }
 
-static struct PyMethodDef net_methods[] = {
-       {"Join", (PyCFunction)py_net_join, METH_VARARGS|METH_KEYWORDS},
-       {NULL }
+static const char py_net_create_user_doc[] = "create_user(username)\n"
+"Create a new user.";
+
+static PyObject *py_net_user_delete(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "username", NULL };
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       struct libnet_DeleteUser r;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s", discard_const_p(char *, kwnames), 
+                                                                        &r.in.user_name))
+               return NULL;
+
+       r.in.domain_name = cli_credentials_get_domain(self->libnet_ctx->cred);
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_DeleteUser(self->libnet_ctx, mem_ctx, &r);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_SetString(PyExc_RuntimeError, r.out.error_string?r.out.error_string:nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       talloc_free(mem_ctx);
+       
+       Py_RETURN_NONE;
+}
+
+static const char py_net_delete_user_doc[] = "delete_user(username)\n"
+"Delete a user.";
+
+static PyObject *py_dom_sid_FromSid(struct dom_sid *sid)
+{
+       PyObject *mod_security, *dom_sid_Type;
+
+       mod_security = PyImport_ImportModule("samba.dcerpc.security");
+       if (mod_security == NULL)
+               return NULL;
+
+       dom_sid_Type = PyObject_GetAttrString(mod_security, "dom_sid");
+       if (dom_sid_Type == NULL)
+               return NULL;
+
+       return py_talloc_reference((PyTypeObject *)dom_sid_Type, sid);
+}
+
+static PyObject *py_net_vampire(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "domain", "target_dir", NULL };
+       NTSTATUS status;
+       TALLOC_CTX *mem_ctx;
+       PyObject *ret;
+       struct libnet_Vampire r;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|z", discard_const_p(char *, kwnames),
+                                        &r.in.domain_name, &r.in.targetdir)) {
+               return NULL;
+       }
+
+       r.in.netbios_name  = lpcfg_netbios_name(self->libnet_ctx->lp_ctx);
+       r.out.error_string = NULL;
+
+       mem_ctx = talloc_new(NULL);
+       if (mem_ctx == NULL) {
+               PyErr_NoMemory();
+               return NULL;
+       }
+
+       status = libnet_Vampire(self->libnet_ctx, mem_ctx, &r);
+
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_SetString(PyExc_RuntimeError,
+                               r.out.error_string ? r.out.error_string : nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       ret = Py_BuildValue("(sO)", r.out.domain_name, py_dom_sid_FromSid(r.out.domain_sid));
+
+       talloc_free(mem_ctx);
+
+       return ret;
+}
+
+struct replicate_state {
+       void *vampire_state;
+       dcerpc_InterfaceObject *drs_pipe;
+       struct libnet_BecomeDC_StoreChunk chunk;
+       DATA_BLOB gensec_skey;
+       struct libnet_BecomeDC_Partition partition;
+       struct libnet_BecomeDC_Forest forest;
+       struct libnet_BecomeDC_DestDSA dest_dsa;
+};
+
+/*
+  setup for replicate_chunk() calls
+ */
+static PyObject *py_net_replicate_init(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "samdb", "lp", "drspipe", NULL };
+       PyObject *py_ldb, *py_lp, *py_drspipe;
+       struct ldb_context *samdb;
+       struct loadparm_context *lp;
+       struct replicate_state *s;
+       NTSTATUS status;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OOO",
+                                        discard_const_p(char *, kwnames),
+                                        &py_ldb, &py_lp, &py_drspipe)) {
+               return NULL;
+       }
+
+       s = talloc_zero(NULL, struct replicate_state);
+       if (!s) return NULL;
+
+       lp = lpcfg_from_py_object(s, py_lp);
+       if (lp == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Expected lp object");
+               talloc_free(s);
+               return NULL;
+       }
+
+       samdb = PyLdb_AsLdbContext(py_ldb);
+       if (samdb == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Expected ldb object");
+               talloc_free(s);
+               return NULL;
+       }
+
+       s->drs_pipe = (dcerpc_InterfaceObject *)(py_drspipe);
+
+       s->vampire_state = libnet_vampire_replicate_init(s, samdb, lp);
+       if (s->vampire_state == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Failed to initialise vampire_state");
+               talloc_free(s);
+               return NULL;
+       }
+
+       status = gensec_session_key(s->drs_pipe->pipe->conn->security_state.generic_state,
+                                   s,
+                                   &s->gensec_skey);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_Format(PyExc_RuntimeError, "Unable to get session key from drspipe: %s",
+                            nt_errstr(status));
+               talloc_free(s);
+               return NULL;
+       }
+
+       s->forest.dns_name = lpcfg_dnsdomain(lp);
+
+       s->chunk.gensec_skey = &s->gensec_skey;
+       s->chunk.partition = &s->partition;
+       s->chunk.forest = &s->forest;
+       s->chunk.dest_dsa = &s->dest_dsa;
+
+       return PyCObject_FromTallocPtr(s);
+}
+
+
+/*
+  process one replication chunk
+ */
+static PyObject *py_net_replicate_chunk(py_net_Object *self, PyObject *args, PyObject *kwargs)
+{
+       const char *kwnames[] = { "state", "level", "ctr", "schema", NULL };
+       PyObject *py_state, *py_ctr, *py_schema;
+       struct replicate_state *s;
+       unsigned level;
+       NTSTATUS (*chunk_handler)(void *private_data, const struct libnet_BecomeDC_StoreChunk *c);
+       NTSTATUS status;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "OIO|O",
+                                        discard_const_p(char *, kwnames),
+                                        &py_state, &level, &py_ctr, &py_schema)) {
+               return NULL;
+       }
+
+       s = talloc_get_type(PyCObject_AsVoidPtr(py_state), struct replicate_state);
+       if (!s) {
+               PyErr_SetString(PyExc_TypeError, "Expected replication_state");
+               return NULL;
+       }
+
+       switch (level) {
+       case 1:
+               if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr1")) {
+                       return NULL;
+               }
+               s->chunk.ctr1                         = py_talloc_get_ptr(py_ctr);
+               s->partition.nc                       = *s->chunk.ctr1->naming_context;
+               s->partition.more_data                = s->chunk.ctr1->more_data;
+               s->partition.source_dsa_guid          = s->chunk.ctr1->source_dsa_guid;
+               s->partition.source_dsa_invocation_id = s->chunk.ctr1->source_dsa_invocation_id;
+               s->partition.highwatermark            = s->chunk.ctr1->new_highwatermark;
+               break;
+       case 6:
+               if (!py_check_dcerpc_type(py_ctr, "samba.dcerpc.drsuapi", "DsGetNCChangesCtr6")) {
+                       return NULL;
+               }
+               s->chunk.ctr6                         = py_talloc_get_ptr(py_ctr);
+               s->partition.nc                       = *s->chunk.ctr6->naming_context;
+               s->partition.more_data                = s->chunk.ctr6->more_data;
+               s->partition.source_dsa_guid          = s->chunk.ctr6->source_dsa_guid;
+               s->partition.source_dsa_invocation_id = s->chunk.ctr6->source_dsa_invocation_id;
+               s->partition.highwatermark            = s->chunk.ctr6->new_highwatermark;
+               break;
+       default:
+               PyErr_Format(PyExc_TypeError, "Bad level %u in replicate_chunk", level);
+               return NULL;
+       }
+
+       chunk_handler = libnet_vampire_cb_store_chunk;
+       if (py_schema) {
+               if (!PyBool_Check(py_schema)) {
+                       PyErr_SetString(PyExc_TypeError, "Expected boolean schema");
+                       return NULL;
+               }
+               if (py_schema == Py_True) {
+                       chunk_handler = libnet_vampire_cb_schema_chunk;
+               }
+       }
+
+       s->chunk.ctr_level = level;
+
+       status = chunk_handler(s->vampire_state, &s->chunk);
+       if (!NT_STATUS_IS_OK(status)) {
+               PyErr_Format(PyExc_TypeError, "Failed to process chunk: %s", nt_errstr(status));
+               return NULL;
+       }
+
+       Py_RETURN_NONE;
+}
+
+
+/*
+  find a DC given a domain name and server type
+ */
+static PyObject *py_net_finddc(py_net_Object *self, PyObject *args)
+{
+       const char *domain_name;
+       unsigned server_type;
+       NTSTATUS status;
+       struct finddcs *io;
+       TALLOC_CTX *mem_ctx;
+       PyObject *ret;
+
+       if (!PyArg_ParseTuple(args, "sI", &domain_name, &server_type)) {
+               return NULL;
+       }
+
+       mem_ctx = talloc_new(self->mem_ctx);
+
+       io = talloc_zero(mem_ctx, struct finddcs);
+       io->in.domain_name = domain_name;
+       io->in.minimum_dc_flags = server_type;
+
+       status = finddcs_cldap(io, io,
+                              lpcfg_resolve_context(self->libnet_ctx->lp_ctx), self->ev);
+       if (NT_STATUS_IS_ERR(status)) {
+               PyErr_SetString(PyExc_RuntimeError, nt_errstr(status));
+               talloc_free(mem_ctx);
+               return NULL;
+       }
+
+       ret = py_return_ndr_struct("samba.dcerpc.nbt", "NETLOGON_SAM_LOGON_RESPONSE_EX",
+                                  io, &io->out.netlogon.data.nt5_ex);
+       talloc_free(mem_ctx);
+
+       return ret;
+}
+
+
+static const char py_net_vampire_doc[] = "vampire(domain, target_dir=None)\n"
+                                        "Vampire a domain.";
+
+static const char py_net_replicate_init_doc[] = "replicate_init(samdb, lp, drspipe)\n"
+                                        "Setup for replicate_chunk calls.";
+
+static const char py_net_replicate_chunk_doc[] = "replicate_chunk(state, level, ctr, schema)\n"
+                                        "Process replication for one chunk";
+
+static const char py_net_finddc_doc[] = "finddc(domain, server_type)\n"
+                                        "find a DC with the specified server_type bits. Return the DNS name";
+
+static PyMethodDef net_obj_methods[] = {
+       {"join_member", (PyCFunction)py_net_join_member, METH_VARARGS|METH_KEYWORDS, py_net_join_member_doc},
+       {"change_password", (PyCFunction)py_net_change_password, METH_VARARGS|METH_KEYWORDS, py_net_change_password_doc},
+       {"set_password", (PyCFunction)py_net_set_password, METH_VARARGS|METH_KEYWORDS, py_net_set_password_doc},
+       {"export_keytab", (PyCFunction)py_net_export_keytab, METH_VARARGS|METH_KEYWORDS, py_net_export_keytab_doc},
+       {"time", (PyCFunction)py_net_time, METH_VARARGS|METH_KEYWORDS, py_net_time_doc},
+       {"create_user", (PyCFunction)py_net_user_create, METH_VARARGS|METH_KEYWORDS, py_net_create_user_doc},
+       {"delete_user", (PyCFunction)py_net_user_delete, METH_VARARGS|METH_KEYWORDS, py_net_delete_user_doc},
+       {"vampire", (PyCFunction)py_net_vampire, METH_VARARGS|METH_KEYWORDS, py_net_vampire_doc},
+       {"replicate_init", (PyCFunction)py_net_replicate_init, METH_VARARGS|METH_KEYWORDS, py_net_replicate_init_doc},
+       {"replicate_chunk", (PyCFunction)py_net_replicate_chunk, METH_VARARGS|METH_KEYWORDS, py_net_replicate_chunk_doc},
+       {"finddc", (PyCFunction)py_net_finddc, METH_VARARGS, py_net_finddc_doc},
+       { NULL }
+};
+
+static void py_net_dealloc(py_net_Object *self)
+{
+       talloc_free(self->mem_ctx);
+       PyObject_Del(self);
+}
+
+static PyObject *net_obj_new(PyTypeObject *type, PyObject *args, PyObject *kwargs)
+{
+       PyObject *py_creds, *py_lp = Py_None;
+       const char *kwnames[] = { "creds", "lp", "server", NULL };
+       py_net_Object *ret;
+       struct loadparm_context *lp;
+       const char *server_address = NULL;
+
+       if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|Oz",
+                                        discard_const_p(char *, kwnames), &py_creds, &py_lp,
+                                        &server_address))
+               return NULL;
+
+       ret = PyObject_New(py_net_Object, type);
+       if (ret == NULL) {
+               return NULL;
+       }
+
+       /* FIXME: we really need to get a context from the caller or we may end
+        * up with 2 event contexts */
+       ret->ev = s4_event_context_init(NULL);
+       ret->mem_ctx = talloc_new(ret->ev);
+
+       lp = lpcfg_from_py_object(ret->mem_ctx, py_lp);
+       if (lp == NULL) {
+               Py_DECREF(ret);
+               return NULL;
+       }
+
+       ret->libnet_ctx = libnet_context_init(ret->ev, lp);
+       if (ret->libnet_ctx == NULL) {
+               PyErr_SetString(PyExc_RuntimeError, "Unable to initialize net");
+               Py_DECREF(ret);
+               return NULL;
+       }
+
+       ret->libnet_ctx->server_address = server_address;
+
+       ret->libnet_ctx->cred = cli_credentials_from_py_object(py_creds);
+       if (ret->libnet_ctx->cred == NULL) {
+               PyErr_SetString(PyExc_TypeError, "Expected credentials object");
+               Py_DECREF(ret);
+               return NULL;
+       }
+
+       return (PyObject *)ret;
+}
+
+
+PyTypeObject py_net_Type = {
+       PyObject_HEAD_INIT(NULL) 0,
+       .tp_name = "net.Net",
+       .tp_basicsize = sizeof(py_net_Object),
+       .tp_dealloc = (destructor)py_net_dealloc,
+       .tp_methods = net_obj_methods,
+       .tp_new = net_obj_new,
 };
 
 void initnet(void)
 {
-       Py_InitModule("net", net_methods);
+       PyObject *m;
+
+       if (PyType_Ready(&py_net_Type) < 0)
+               return;
+
+       m = Py_InitModule3("net", NULL, NULL);
+       if (m == NULL)
+               return;
+
+       Py_INCREF(&py_net_Type);
+       PyModule_AddObject(m, "Net", (PyObject *)&py_net_Type);
+       PyModule_AddObject(m, "LIBNET_JOINDOMAIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOINDOMAIN_AUTOMATIC));
+       PyModule_AddObject(m, "LIBNET_JOINDOMAIN_SPECIFIED", PyInt_FromLong(LIBNET_JOINDOMAIN_SPECIFIED));
+       PyModule_AddObject(m, "LIBNET_JOIN_AUTOMATIC", PyInt_FromLong(LIBNET_JOIN_AUTOMATIC));
+       PyModule_AddObject(m, "LIBNET_JOIN_SPECIFIED", PyInt_FromLong(LIBNET_JOIN_SPECIFIED));
 }