2 Unix SMB/CIFS implementation.
3 Samba utility functions
4 Copyright (C) Jelmer Vernooij <jelmer@samba.org> 2008
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
22 #include <structmember.h>
23 #include "librpc/rpc/pyrpc.h"
24 #include "librpc/rpc/dcerpc.h"
25 #include "lib/events/events.h"
26 #include "param/pyparam.h"
28 static PyObject *py_dcerpc_run_function(dcerpc_InterfaceObject *iface, struct PyNdrRpcMethodDef *md, PyObject *args, PyObject *kwargs)
33 PyObject *result = Py_None;
35 if (md->pack_in_data == NULL || md->unpack_out_data == NULL) {
36 PyErr_SetString(PyExc_NotImplementedError, "No marshalling code available yet");
40 mem_ctx = talloc_new(NULL);
44 r = talloc_zero_size(mem_ctx, md->table->calls[md->opnum].struct_size);
48 if (!md->pack_in_data(args, kwargs, r)) {
53 status = md->call(iface->pipe, mem_ctx, r);
54 if (NT_STATUS_IS_ERR(status)) {
55 PyErr_SetDCERPCStatus(iface->pipe, status);
60 result = md->unpack_out_data(r);
66 static PyObject *py_dcerpc_call_wrapper(PyObject *self, PyObject *args, void *wrapped, PyObject *kwargs)
68 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
69 struct PyNdrRpcMethodDef *md = wrapped;
71 return py_dcerpc_run_function(iface, md, args, kwargs);
75 bool PyInterface_AddNdrRpcMethods(PyTypeObject *ifacetype, const struct PyNdrRpcMethodDef *mds)
78 for (i = 0; mds[i].name; i++) {
80 struct wrapperbase *wb = calloc(sizeof(struct wrapperbase), 1);
82 wb->name = discard_const_p(char, mds[i].name);
83 wb->flags = PyWrapperFlag_KEYWORDS;
84 wb->wrapper = (wrapperfunc)py_dcerpc_call_wrapper;
85 wb->doc = discard_const_p(char, mds[i].doc);
87 ret = PyDescr_NewWrapper(ifacetype, wb, discard_const_p(void, &mds[i]));
89 PyDict_SetItemString(ifacetype->tp_dict, mds[i].name,
96 static bool PyString_AsGUID(PyObject *object, struct GUID *uuid)
99 status = GUID_from_string(PyString_AsString(object), uuid);
100 if (NT_STATUS_IS_ERR(status)) {
101 PyErr_SetNTSTATUS(status);
107 static bool ndr_syntax_from_py_object(PyObject *object, struct ndr_syntax_id *syntax_id)
109 ZERO_STRUCTP(syntax_id);
111 if (PyString_Check(object)) {
112 return PyString_AsGUID(object, &syntax_id->uuid);
113 } else if (PyTuple_Check(object)) {
114 if (PyTuple_Size(object) < 1 || PyTuple_Size(object) > 2) {
115 PyErr_SetString(PyExc_ValueError, "Syntax ID tuple has invalid size");
119 if (!PyString_Check(PyTuple_GetItem(object, 0))) {
120 PyErr_SetString(PyExc_ValueError, "Expected GUID as first element in tuple");
124 if (!PyString_AsGUID(PyTuple_GetItem(object, 0), &syntax_id->uuid))
127 if (!PyInt_Check(PyTuple_GetItem(object, 1))) {
128 PyErr_SetString(PyExc_ValueError, "Expected version as second element in tuple");
132 syntax_id->if_version = PyInt_AsLong(PyTuple_GetItem(object, 1));
136 PyErr_SetString(PyExc_TypeError, "Expected UUID or syntax id tuple");
140 static PyObject *py_iface_server_name(PyObject *obj, void *closure)
142 const char *server_name;
143 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
145 server_name = dcerpc_server_name(iface->pipe);
146 if (server_name == NULL)
149 return PyString_FromString(server_name);
152 static PyObject *py_ndr_syntax_id(struct ndr_syntax_id *syntax_id)
157 uuid_str = GUID_string(NULL, &syntax_id->uuid);
158 if (uuid_str == NULL)
161 ret = Py_BuildValue("(s,i)", uuid_str, syntax_id->if_version);
163 talloc_free(uuid_str);
168 static PyObject *py_iface_abstract_syntax(PyObject *obj, void *closure)
170 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
172 return py_ndr_syntax_id(&iface->pipe->syntax);
175 static PyObject *py_iface_transfer_syntax(PyObject *obj, void *closure)
177 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)obj;
179 return py_ndr_syntax_id(&iface->pipe->transfer_syntax);
182 static PyGetSetDef dcerpc_interface_getsetters[] = {
183 { discard_const_p(char, "server_name"), py_iface_server_name, NULL,
184 discard_const_p(char, "name of the server, if connected over SMB") },
185 { discard_const_p(char, "abstract_syntax"), py_iface_abstract_syntax, NULL,
186 discard_const_p(char, "syntax id of the abstract syntax") },
187 { discard_const_p(char, "transfer_syntax"), py_iface_transfer_syntax, NULL,
188 discard_const_p(char, "syntax id of the transfersyntax") },
192 static PyMemberDef dcerpc_interface_members[] = {
193 { discard_const_p(char, "request_timeout"), T_INT,
194 offsetof(struct dcerpc_pipe, request_timeout), 0,
195 discard_const_p(char, "request timeout, in seconds") },
199 void PyErr_SetDCERPCStatus(struct dcerpc_pipe *p, NTSTATUS status)
201 if (p != NULL && NT_STATUS_EQUAL(status, NT_STATUS_NET_WRITE_FAULT)) {
202 const char *errstr = dcerpc_errstr(NULL, p->last_fault_code);
203 PyErr_SetObject(PyExc_RuntimeError,
204 Py_BuildValue("(i,s)", p->last_fault_code,
207 PyErr_SetNTSTATUS(status);
211 static PyObject *py_iface_request(PyObject *self, PyObject *args, PyObject *kwargs)
213 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
215 DATA_BLOB data_in, data_out;
220 PyObject *object = NULL;
221 struct GUID object_guid;
222 TALLOC_CTX *mem_ctx = talloc_new(NULL);
223 const char *kwnames[] = { "opnum", "data", "object", NULL };
225 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "is#|O:request",
226 discard_const_p(char *, kwnames), &opnum, &in_data, &in_length, &object)) {
230 data_in.data = (uint8_t *)talloc_memdup(mem_ctx, in_data, in_length);
231 data_in.length = in_length;
233 ZERO_STRUCT(data_out);
235 if (object != NULL && !PyString_AsGUID(object, &object_guid)) {
239 status = dcerpc_request(iface->pipe, object?&object_guid:NULL,
240 opnum, false, mem_ctx, &data_in, &data_out);
242 if (NT_STATUS_IS_ERR(status)) {
243 PyErr_SetDCERPCStatus(iface->pipe, status);
244 talloc_free(mem_ctx);
248 ret = PyString_FromStringAndSize((char *)data_out.data, data_out.length);
250 talloc_free(mem_ctx);
254 static PyObject *py_iface_alter_context(PyObject *self, PyObject *args, PyObject *kwargs)
256 dcerpc_InterfaceObject *iface = (dcerpc_InterfaceObject *)self;
258 const char *kwnames[] = { "abstract_syntax", "transfer_syntax", NULL };
259 PyObject *py_abstract_syntax = Py_None, *py_transfer_syntax = Py_None;
260 struct ndr_syntax_id abstract_syntax, transfer_syntax;
262 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O|O:alter_context",
263 discard_const_p(char *, kwnames), &py_abstract_syntax,
264 &py_transfer_syntax)) {
268 if (!ndr_syntax_from_py_object(py_abstract_syntax, &abstract_syntax))
271 if (py_transfer_syntax == Py_None) {
272 transfer_syntax = ndr_transfer_syntax;
274 if (!ndr_syntax_from_py_object(py_transfer_syntax,
279 status = dcerpc_alter_context(iface->pipe, iface->pipe, &abstract_syntax,
282 if (NT_STATUS_IS_ERR(status)) {
283 PyErr_SetDCERPCStatus(iface->pipe, status);
290 PyObject *py_dcerpc_interface_init_helper(PyTypeObject *type, PyObject *args, PyObject *kwargs, const struct ndr_interface_table *table)
292 dcerpc_InterfaceObject *ret;
293 const char *binding_string;
294 struct cli_credentials *credentials;
295 struct loadparm_context *lp_ctx = NULL;
296 PyObject *py_lp_ctx = Py_None, *py_credentials = Py_None, *py_basis = Py_None;
297 TALLOC_CTX *mem_ctx = NULL;
298 struct tevent_context *event_ctx;
301 const char *kwnames[] = {
302 "binding", "lp_ctx", "credentials", "basis_connection", NULL
304 extern struct cli_credentials *cli_credentials_from_py_object(PyObject *py_obj);
306 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "s|OOO:samr", discard_const_p(char *, kwnames), &binding_string, &py_lp_ctx, &py_credentials, &py_basis)) {
310 lp_ctx = lp_from_py_object(py_lp_ctx);
311 if (lp_ctx == NULL) {
312 PyErr_SetString(PyExc_TypeError, "Expected loadparm context");
316 status = dcerpc_init(lp_ctx);
317 if (!NT_STATUS_IS_OK(status)) {
318 PyErr_SetNTSTATUS(status);
321 credentials = cli_credentials_from_py_object(py_credentials);
322 if (credentials == NULL) {
323 PyErr_SetString(PyExc_TypeError, "Expected credentials");
326 ret = PyObject_New(dcerpc_InterfaceObject, type);
328 event_ctx = event_context_init(mem_ctx);
330 if (py_basis != Py_None) {
331 struct dcerpc_pipe *base_pipe;
333 if (!PyObject_TypeCheck(py_basis, &dcerpc_InterfaceType)) {
334 PyErr_SetString(PyExc_ValueError, "basis_connection must be a DCE/RPC connection");
335 talloc_free(mem_ctx);
339 base_pipe = ((dcerpc_InterfaceObject *)py_basis)->pipe;
341 status = dcerpc_secondary_context(base_pipe, &ret->pipe, table);
343 status = dcerpc_pipe_connect(NULL, &ret->pipe, binding_string,
344 table, credentials, event_ctx, lp_ctx);
346 if (NT_STATUS_IS_ERR(status)) {
347 PyErr_SetNTSTATUS(status);
348 talloc_free(mem_ctx);
352 ret->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
353 return (PyObject *)ret;
356 static PyMethodDef dcerpc_interface_methods[] = {
357 { "request", (PyCFunction)py_iface_request, METH_VARARGS|METH_KEYWORDS, "S.request(opnum, data, object=None) -> data\nMake a raw request" },
358 { "alter_context", (PyCFunction)py_iface_alter_context, METH_VARARGS|METH_KEYWORDS, "S.alter_context(syntax)\nChange to a different interface" },
359 { NULL, NULL, 0, NULL },
363 static void dcerpc_interface_dealloc(PyObject* self)
365 dcerpc_InterfaceObject *interface = (dcerpc_InterfaceObject *)self;
366 talloc_free(interface->pipe);
370 static PyObject *dcerpc_interface_new(PyTypeObject *self, PyObject *args, PyObject *kwargs)
372 dcerpc_InterfaceObject *ret;
373 const char *binding_string;
374 struct cli_credentials *credentials;
375 struct loadparm_context *lp_ctx = NULL;
376 PyObject *py_lp_ctx = Py_None, *py_credentials = Py_None;
377 TALLOC_CTX *mem_ctx = NULL;
378 struct tevent_context *event_ctx;
381 PyObject *syntax, *py_basis = Py_None;
382 const char *kwnames[] = {
383 "binding", "syntax", "lp_ctx", "credentials", "basis_connection", NULL
385 extern struct cli_credentials *cli_credentials_from_py_object(PyObject *py_obj);
386 struct ndr_interface_table *table;
388 if (!PyArg_ParseTupleAndKeywords(args, kwargs, "sO|OOO:connect", discard_const_p(char *, kwnames), &binding_string, &syntax, &py_lp_ctx, &py_credentials, &py_basis)) {
392 lp_ctx = lp_from_py_object(py_lp_ctx);
393 if (lp_ctx == NULL) {
394 PyErr_SetString(PyExc_TypeError, "Expected loadparm context");
398 credentials = cli_credentials_from_py_object(py_credentials);
399 if (credentials == NULL) {
400 PyErr_SetString(PyExc_TypeError, "Expected credentials");
403 ret = PyObject_New(dcerpc_InterfaceObject, &dcerpc_InterfaceType);
405 event_ctx = s4_event_context_init(mem_ctx);
407 /* Create a dummy interface table struct. TODO: In the future, we should rather just allow
408 * connecting without requiring an interface table.
411 table = talloc_zero(mem_ctx, struct ndr_interface_table);
414 PyErr_SetString(PyExc_MemoryError, "Allocating interface table");
418 if (!ndr_syntax_from_py_object(syntax, &table->syntax_id)) {
424 if (py_basis != Py_None) {
425 struct dcerpc_pipe *base_pipe;
427 if (!PyObject_TypeCheck(py_basis, &dcerpc_InterfaceType)) {
428 PyErr_SetString(PyExc_ValueError, "basis_connection must be a DCE/RPC connection");
429 talloc_free(mem_ctx);
433 base_pipe = ((dcerpc_InterfaceObject *)py_basis)->pipe;
435 status = dcerpc_secondary_context(base_pipe, &ret->pipe,
437 ret->pipe = talloc_steal(NULL, ret->pipe);
439 status = dcerpc_pipe_connect(NULL, &ret->pipe, binding_string,
440 table, credentials, event_ctx, lp_ctx);
443 if (NT_STATUS_IS_ERR(status)) {
444 PyErr_SetDCERPCStatus(ret->pipe, status);
445 talloc_free(mem_ctx);
448 ret->pipe->conn->flags |= DCERPC_NDR_REF_ALLOC;
449 return (PyObject *)ret;
452 PyTypeObject dcerpc_InterfaceType = {
453 PyObject_HEAD_INIT(NULL) 0,
454 .tp_name = "dcerpc.ClientConnection",
455 .tp_basicsize = sizeof(dcerpc_InterfaceObject),
456 .tp_dealloc = dcerpc_interface_dealloc,
457 .tp_getset = dcerpc_interface_getsetters,
458 .tp_members = dcerpc_interface_members,
459 .tp_methods = dcerpc_interface_methods,
460 .tp_doc = "ClientConnection(binding, syntax, lp_ctx=None, credentials=None) -> connection\n"
462 "binding should be a DCE/RPC binding string (for example: ncacn_ip_tcp:127.0.0.1)\n"
463 "syntax should be a tuple with a GUID and version number of an interface\n"
464 "lp_ctx should be a path to a smb.conf file or a param.LoadParm object\n"
465 "credentials should be a credentials.Credentials object.\n\n",
466 .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
467 .tp_new = dcerpc_interface_new,
474 if (PyType_Ready(&dcerpc_InterfaceType) < 0)
477 m = Py_InitModule3("base", NULL, "DCE/RPC protocol implementation");
481 Py_INCREF((PyObject *)&dcerpc_InterfaceType);
482 PyModule_AddObject(m, "ClientConnection", (PyObject *)&dcerpc_InterfaceType);