source3/libsmb/pylibsmb.c

   1 /*
   2  * Unix SMB/CIFS implementation.
   3  * Samba-internal work in progress Python binding for libsmbclient
   4  *
   5  * Copyright (C) Volker Lendecke 2012
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published by
   9  * the Free Software Foundation; either version 3 of the License, or
  10  * (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21 #include <Python.h>
  22 #include "includes.h"
  23 #include "libsmb/libsmb.h"
  24 #include "libcli/security/security.h"
  25 #include "system/select.h"
  26 #include "source4/libcli/util/pyerrors.h"
  27 #include "auth/credentials/pycredentials.h"
  28 #include "trans2.h"
  29
  30 static PyTypeObject *get_pytype(const char *module, const char *type)
  31 {
  32         PyObject *mod;
  33         PyTypeObject *result;
  34
  35         mod = PyImport_ImportModule(module);
  36         if (mod == NULL) {
  37                 PyErr_Format(PyExc_RuntimeError,
  38                              "Unable to import %s to check type %s",
  39                              module, type);
  40                 return NULL;
  41         }
  42         result = (PyTypeObject *)PyObject_GetAttrString(mod, type);
  43         Py_DECREF(mod);
  44         if (result == NULL) {
  45                 PyErr_Format(PyExc_RuntimeError,
  46                              "Unable to find type %s in module %s",
  47                              module, type);
  48                 return NULL;
  49         }
  50         return result;
  51 }
  52
  53 /*
  54  * We're using "const char **" for keywords,
  55  * PyArg_ParseTupleAndKeywords expects a "char **". Confine the
  56  * inevitable warnings to just one place.
  57  */
  58 static int ParseTupleAndKeywords(PyObject *args, PyObject *kw,
  59                                  const char *format, const char **keywords,
  60                                  ...)
  61 {
  62         va_list a;
  63         int ret;
  64         va_start(a, keywords);
  65         ret = PyArg_VaParseTupleAndKeywords(args, kw, format,
  66                                             (char **)keywords, a);
  67         va_end(a);
  68         return ret;
  69 }
  70
  71 struct py_cli_thread;
  72
  73 struct py_cli_oplock_break {
  74         uint16_t fnum;
  75         uint8_t level;
  76 };
  77
  78 struct py_cli_state {
  79         PyObject_HEAD
  80         struct cli_state *cli;
  81         struct tevent_context *ev;
  82         struct py_cli_thread *thread_state;
  83
  84         struct tevent_req *oplock_waiter;
  85         struct py_cli_oplock_break *oplock_breaks;
  86         struct py_tevent_cond *oplock_cond;
  87 };
  88
  89 #if HAVE_PTHREAD
  90
  91 #include <pthread.h>
  92
  93 struct py_cli_thread {
  94
  95         /*
  96          * Pipe to make the poll thread wake up in our destructor, so
  97          * that we can exit and join the thread.
  98          */
  99         int shutdown_pipe[2];
 100         struct tevent_fd *shutdown_fde;
 101         bool do_shutdown;
 102         pthread_t id;
 103
 104         /*
 105          * Thread state to release the GIL during the poll(2) syscall
 106          */
 107         PyThreadState *py_threadstate;
 108 };
 109
 110 static void *py_cli_state_poll_thread(void *private_data)
 111 {
 112         struct py_cli_state *self = (struct py_cli_state *)private_data;
 113         struct py_cli_thread *t = self->thread_state;
 114         PyGILState_STATE gstate;
 115
 116         gstate = PyGILState_Ensure();
 117
 118         while (!t->do_shutdown) {
 119                 int ret;
 120                 ret = tevent_loop_once(self->ev);
 121                 assert(ret == 0);
 122         }
 123         PyGILState_Release(gstate);
 124         return NULL;
 125 }
 126
 127 static void py_cli_state_trace_callback(enum tevent_trace_point point,
 128                                         void *private_data)
 129 {
 130         struct py_cli_state *self = (struct py_cli_state *)private_data;
 131         struct py_cli_thread *t = self->thread_state;
 132
 133         switch(point) {
 134         case TEVENT_TRACE_BEFORE_WAIT:
 135                 assert(t->py_threadstate == NULL);
 136                 t->py_threadstate = PyEval_SaveThread();
 137                 break;
 138         case TEVENT_TRACE_AFTER_WAIT:
 139                 assert(t->py_threadstate != NULL);
 140                 PyEval_RestoreThread(t->py_threadstate);
 141                 t->py_threadstate = NULL;
 142                 break;
 143         default:
 144                 break;
 145         }
 146 }
 147
 148 static void py_cli_state_shutdown_handler(struct tevent_context *ev,
 149                                           struct tevent_fd *fde,
 150                                           uint16_t flags,
 151                                           void *private_data)
 152 {
 153         struct py_cli_state *self = (struct py_cli_state *)private_data;
 154         struct py_cli_thread *t = self->thread_state;
 155
 156         if ((flags & TEVENT_FD_READ) == 0) {
 157                 return;
 158         }
 159         TALLOC_FREE(t->shutdown_fde);
 160         t->do_shutdown = true;
 161 }
 162
 163 static int py_cli_thread_destructor(struct py_cli_thread *t)
 164 {
 165         char c = 0;
 166         ssize_t written;
 167         int ret;
 168
 169         do {
 170                 /*
 171                  * This will wake the poll thread from the poll(2)
 172                  */
 173                 written = write(t->shutdown_pipe[1], &c, 1);
 174         } while ((written == -1) && (errno == EINTR));
 175
 176         /*
 177          * Allow the poll thread to do its own cleanup under the GIL
 178          */
 179         Py_BEGIN_ALLOW_THREADS
 180         ret = pthread_join(t->id, NULL);
 181         Py_END_ALLOW_THREADS
 182         assert(ret == 0);
 183
 184         if (t->shutdown_pipe[0] != -1) {
 185                 close(t->shutdown_pipe[0]);
 186                 t->shutdown_pipe[0] = -1;
 187         }
 188         if (t->shutdown_pipe[1] != -1) {
 189                 close(t->shutdown_pipe[1]);
 190                 t->shutdown_pipe[1] = -1;
 191         }
 192         return 0;
 193 }
 194
 195 static bool py_cli_state_setup_ev(struct py_cli_state *self)
 196 {
 197         struct py_cli_thread *t = NULL;
 198         int ret;
 199
 200         self->ev = tevent_context_init_byname(NULL, "poll_mt");
 201         if (self->ev == NULL) {
 202                 goto fail;
 203         }
 204         samba_tevent_set_debug(self->ev, "pylibsmb_tevent_mt");
 205         tevent_set_trace_callback(self->ev, py_cli_state_trace_callback, self);
 206
 207         self->thread_state = talloc_zero(NULL, struct py_cli_thread);
 208         if (self->thread_state == NULL) {
 209                 goto fail;
 210         }
 211         t = self->thread_state;
 212
 213         ret = pipe(t->shutdown_pipe);
 214         if (ret == -1) {
 215                 goto fail;
 216         }
 217         t->shutdown_fde = tevent_add_fd(
 218                 self->ev, self->ev, t->shutdown_pipe[0], TEVENT_FD_READ,
 219                 py_cli_state_shutdown_handler, self);
 220         if (t->shutdown_fde == NULL) {
 221                 goto fail;
 222         }
 223
 224         PyEval_InitThreads();
 225
 226         ret = pthread_create(&t->id, NULL, py_cli_state_poll_thread, self);
 227         if (ret != 0) {
 228                 goto fail;
 229         }
 230         talloc_set_destructor(self->thread_state, py_cli_thread_destructor);
 231         return true;
 232
 233 fail:
 234         if (t != NULL) {
 235                 TALLOC_FREE(t->shutdown_fde);
 236
 237                 if (t->shutdown_pipe[0] != -1) {
 238                         close(t->shutdown_pipe[0]);
 239                         t->shutdown_pipe[0] = -1;
 240                 }
 241                 if (t->shutdown_pipe[1] != -1) {
 242                         close(t->shutdown_pipe[1]);
 243                         t->shutdown_pipe[1] = -1;
 244                 }
 245         }
 246
 247         TALLOC_FREE(self->thread_state);
 248         TALLOC_FREE(self->ev);
 249         return false;
 250 }
 251
 252 struct py_tevent_cond {
 253         pthread_mutex_t mutex;
 254         pthread_cond_t cond;
 255         bool is_done;
 256 };
 257
 258 static void py_tevent_signalme(struct tevent_req *req);
 259
 260 static int py_tevent_cond_wait(struct py_tevent_cond *cond)
 261 {
 262         int ret, result;
 263
 264         result = pthread_mutex_init(&cond->mutex, NULL);
 265         if (result != 0) {
 266                 goto fail;
 267         }
 268         result = pthread_cond_init(&cond->cond, NULL);
 269         if (result != 0) {
 270                 goto fail_mutex;
 271         }
 272
 273         result = pthread_mutex_lock(&cond->mutex);
 274         if (result != 0) {
 275                 goto fail_cond;
 276         }
 277
 278         cond->is_done = false;
 279
 280         while (!cond->is_done) {
 281
 282                 Py_BEGIN_ALLOW_THREADS
 283                 result = pthread_cond_wait(&cond->cond, &cond->mutex);
 284                 Py_END_ALLOW_THREADS
 285
 286                 if (result != 0) {
 287                         goto fail_unlock;
 288                 }
 289         }
 290
 291 fail_unlock:
 292         ret = pthread_mutex_unlock(&cond->mutex);
 293         assert(ret == 0);
 294 fail_cond:
 295         ret = pthread_cond_destroy(&cond->cond);
 296         assert(ret == 0);
 297 fail_mutex:
 298         ret = pthread_mutex_destroy(&cond->mutex);
 299         assert(ret == 0);
 300 fail:
 301         return result;
 302 }
 303
 304 static int py_tevent_req_wait(struct tevent_context *ev,
 305                               struct tevent_req *req)
 306 {
 307         struct py_tevent_cond cond;
 308         tevent_req_set_callback(req, py_tevent_signalme, &cond);
 309         return py_tevent_cond_wait(&cond);
 310 }
 311
 312 static void py_tevent_cond_signal(struct py_tevent_cond *cond)
 313 {
 314         int ret;
 315
 316         ret = pthread_mutex_lock(&cond->mutex);
 317         assert(ret == 0);
 318
 319         cond->is_done = true;
 320
 321         ret = pthread_cond_signal(&cond->cond);
 322         assert(ret == 0);
 323         ret = pthread_mutex_unlock(&cond->mutex);
 324         assert(ret == 0);
 325 }
 326
 327 static void py_tevent_signalme(struct tevent_req *req)
 328 {
 329         struct py_tevent_cond *cond = (struct py_tevent_cond *)
 330                 tevent_req_callback_data_void(req);
 331
 332         py_tevent_cond_signal(cond);
 333 }
 334
 335 #else
 336
 337 static bool py_cli_state_setup_ev(struct py_cli_state *self)
 338 {
 339         self->ev = tevent_context_init(NULL);
 340         if (self->ev == NULL) {
 341                 return false;
 342         }
 343
 344         samba_tevent_set_debug(self->ev, "pylibsmb_tevent");
 345
 346         return true;
 347 }
 348
 349 static int py_tevent_req_wait(struct tevent_context *ev,
 350                               struct tevent_req *req)
 351 {
 352         while (tevent_req_is_in_progress(req)) {
 353                 int ret;
 354
 355                 ret = tevent_loop_once(ev);
 356                 if (ret != 0) {
 357                         return ret;
 358                 }
 359         }
 360         return 0;
 361 }
 362
 363 #endif
 364
 365 static bool py_tevent_req_wait_exc(struct tevent_context *ev,
 366                                    struct tevent_req *req)
 367 {
 368         int ret;
 369
 370         if (req == NULL) {
 371                 PyErr_NoMemory();
 372                 return false;
 373         }
 374         ret = py_tevent_req_wait(ev, req);
 375         if (ret != 0) {
 376                 TALLOC_FREE(req);
 377                 errno = ret;
 378                 PyErr_SetFromErrno(PyExc_RuntimeError);
 379                 return false;
 380         }
 381         return true;
 382 }
 383
 384 static PyObject *py_cli_state_new(PyTypeObject *type, PyObject *args,
 385                                   PyObject *kwds)
 386 {
 387         struct py_cli_state *self;
 388
 389         self = (struct py_cli_state *)type->tp_alloc(type, 0);
 390         if (self == NULL) {
 391                 return NULL;
 392         }
 393         self->cli = NULL;
 394         self->ev = NULL;
 395         self->thread_state = NULL;
 396         self->oplock_waiter = NULL;
 397         self->oplock_cond = NULL;
 398         self->oplock_breaks = NULL;
 399         return (PyObject *)self;
 400 }
 401
 402 static void py_cli_got_oplock_break(struct tevent_req *req);
 403
 404 static int py_cli_state_init(struct py_cli_state *self, PyObject *args,
 405                              PyObject *kwds)
 406 {
 407         NTSTATUS status;
 408         char *host, *share;
 409         PyObject *creds;
 410         struct cli_credentials *cli_creds;
 411         bool ret;
 412
 413         static const char *kwlist[] = {
 414                 "host", "share", "credentials", NULL
 415         };
 416
 417         PyTypeObject *py_type_Credentials = get_pytype(
 418                 "samba.credentials", "Credentials");
 419         if (py_type_Credentials == NULL) {
 420                 return -1;
 421         }
 422
 423         ret = ParseTupleAndKeywords(
 424                 args, kwds, "ss|O!", kwlist,
 425                 &host, &share, py_type_Credentials, &creds);
 426
 427         Py_DECREF(py_type_Credentials);
 428
 429         if (!ret) {
 430                 return -1;
 431         }
 432
 433         if (!py_cli_state_setup_ev(self)) {
 434                 return -1;
 435         }
 436
 437         cli_creds = cli_credentials_from_py_object(creds);
 438         if (cli_creds == NULL) {
 439                 PyErr_SetString(PyExc_TypeError, "Expected credentials");
 440                 return -1;
 441         }
 442
 443         status = cli_full_connection(
 444                 &self->cli, "myname", host, NULL, 0, share, "?????",
 445                 cli_credentials_get_username(cli_creds),
 446                 cli_credentials_get_domain(cli_creds),
 447                 cli_credentials_get_password(cli_creds),
 448                 0, 0);
 449         if (!NT_STATUS_IS_OK(status)) {
 450                 PyErr_SetNTSTATUS(status);
 451                 return -1;
 452         }
 453
 454         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 455                 self->ev, self->ev, self->cli);
 456         if (self->oplock_waiter == NULL) {
 457                 PyErr_NoMemory();
 458                 return -1;
 459         }
 460         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 461                                 self);
 462         return 0;
 463 }
 464
 465 static void py_cli_got_oplock_break(struct tevent_req *req)
 466 {
 467         struct py_cli_state *self = (struct py_cli_state *)
 468                 tevent_req_callback_data_void(req);
 469         struct py_cli_oplock_break b;
 470         struct py_cli_oplock_break *tmp;
 471         size_t num_breaks;
 472         NTSTATUS status;
 473
 474         status = cli_smb_oplock_break_waiter_recv(req, &b.fnum, &b.level);
 475         TALLOC_FREE(req);
 476         self->oplock_waiter = NULL;
 477
 478         if (!NT_STATUS_IS_OK(status)) {
 479                 return;
 480         }
 481
 482         num_breaks = talloc_array_length(self->oplock_breaks);
 483         tmp = talloc_realloc(self->ev, self->oplock_breaks,
 484                              struct py_cli_oplock_break, num_breaks+1);
 485         if (tmp == NULL) {
 486                 return;
 487         }
 488         self->oplock_breaks = tmp;
 489         self->oplock_breaks[num_breaks] = b;
 490
 491         if (self->oplock_cond != NULL) {
 492                 py_tevent_cond_signal(self->oplock_cond);
 493         }
 494
 495         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 496                 self->ev, self->ev, self->cli);
 497         if (self->oplock_waiter == NULL) {
 498                 return;
 499         }
 500         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 501                                 self);
 502 }
 503
 504 static PyObject *py_cli_get_oplock_break(struct py_cli_state *self,
 505                                          PyObject *args)
 506 {
 507         size_t num_oplock_breaks;
 508
 509         if (!PyArg_ParseTuple(args, "")) {
 510                 return NULL;
 511         }
 512
 513         if (self->oplock_cond != NULL) {
 514                 errno = EBUSY;
 515                 PyErr_SetFromErrno(PyExc_RuntimeError);
 516                 return NULL;
 517         }
 518
 519         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 520
 521         if (num_oplock_breaks == 0) {
 522                 struct py_tevent_cond cond;
 523                 int ret;
 524
 525                 self->oplock_cond = &cond;
 526                 ret = py_tevent_cond_wait(&cond);
 527                 self->oplock_cond = NULL;
 528
 529                 if (ret != 0) {
 530                         errno = ret;
 531                         PyErr_SetFromErrno(PyExc_RuntimeError);
 532                         return NULL;
 533                 }
 534         }
 535
 536         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 537         if (num_oplock_breaks > 0) {
 538                 PyObject *result;
 539
 540                 result = Py_BuildValue(
 541                         "{s:i,s:i}",
 542                         "fnum", self->oplock_breaks[0].fnum,
 543                         "level", self->oplock_breaks[0].level);
 544
 545                 memmove(&self->oplock_breaks[0], &self->oplock_breaks[1],
 546                         sizeof(self->oplock_breaks[0]) *
 547                         (num_oplock_breaks - 1));
 548                 self->oplock_breaks = talloc_realloc(
 549                         NULL, self->oplock_breaks, struct py_cli_oplock_break,
 550                         num_oplock_breaks - 1);
 551
 552                 return result;
 553         }
 554         Py_RETURN_NONE;
 555 }
 556
 557 static void py_cli_state_dealloc(struct py_cli_state *self)
 558 {
 559         TALLOC_FREE(self->thread_state);
 560         TALLOC_FREE(self->oplock_waiter);
 561         TALLOC_FREE(self->ev);
 562
 563         if (self->cli != NULL) {
 564                 cli_shutdown(self->cli);
 565                 self->cli = NULL;
 566         }
 567         self->ob_type->tp_free((PyObject *)self);
 568 }
 569
 570 static PyObject *py_cli_create(struct py_cli_state *self, PyObject *args,
 571                                PyObject *kwds)
 572 {
 573         char *fname;
 574         unsigned CreateFlags = 0;
 575         unsigned DesiredAccess = FILE_GENERIC_READ;
 576         unsigned FileAttributes = 0;
 577         unsigned ShareAccess = 0;
 578         unsigned CreateDisposition = FILE_OPEN;
 579         unsigned CreateOptions = 0;
 580         unsigned SecurityFlags = 0;
 581         uint16_t fnum;
 582         struct tevent_req *req;
 583         NTSTATUS status;
 584
 585         static const char *kwlist[] = {
 586                 "Name", "CreateFlags", "DesiredAccess", "FileAttributes",
 587                 "ShareAccess", "CreateDisposition", "CreateOptions",
 588                 "SecurityFlags", NULL };
 589
 590         if (!ParseTupleAndKeywords(
 591                     args, kwds, "s|IIIIIII", kwlist,
 592                     &fname, &CreateFlags, &DesiredAccess, &FileAttributes,
 593                     &ShareAccess, &CreateDisposition, &CreateOptions,
 594                     &SecurityFlags)) {
 595                 return NULL;
 596         }
 597
 598         req = cli_ntcreate_send(NULL, self->ev, self->cli, fname, CreateFlags,
 599                                 DesiredAccess, FileAttributes, ShareAccess,
 600                                 CreateDisposition, CreateOptions,
 601                                 SecurityFlags);
 602         if (!py_tevent_req_wait_exc(self->ev, req)) {
 603                 return NULL;
 604         }
 605         status = cli_ntcreate_recv(req, &fnum);
 606         TALLOC_FREE(req);
 607
 608         if (!NT_STATUS_IS_OK(status)) {
 609                 PyErr_SetNTSTATUS(status);
 610                 return NULL;
 611         }
 612         return Py_BuildValue("I", (unsigned)fnum);
 613 }
 614
 615 static PyObject *py_cli_close(struct py_cli_state *self, PyObject *args)
 616 {
 617         struct tevent_req *req;
 618         int fnum;
 619         NTSTATUS status;
 620
 621         if (!PyArg_ParseTuple(args, "i", &fnum)) {
 622                 return NULL;
 623         }
 624
 625         req = cli_close_send(NULL, self->ev, self->cli, fnum);
 626         if (!py_tevent_req_wait_exc(self->ev, req)) {
 627                 return NULL;
 628         }
 629         status = cli_close_recv(req);
 630         TALLOC_FREE(req);
 631
 632         if (!NT_STATUS_IS_OK(status)) {
 633                 PyErr_SetNTSTATUS(status);
 634                 return NULL;
 635         }
 636         Py_RETURN_NONE;
 637 }
 638
 639 static PyObject *py_cli_write(struct py_cli_state *self, PyObject *args,
 640                               PyObject *kwds)
 641 {
 642         int fnum;
 643         unsigned mode = 0;
 644         char *buf;
 645         int buflen;
 646         unsigned long long offset;
 647         struct tevent_req *req;
 648         NTSTATUS status;
 649         size_t written;
 650
 651         static const char *kwlist[] = {
 652                 "fnum", "buffer", "offset", "mode", NULL };
 653
 654         if (!ParseTupleAndKeywords(
 655                     args, kwds, "Is#K|I", kwlist,
 656                     &fnum, &buf, &buflen, &offset, &mode)) {
 657                 return NULL;
 658         }
 659
 660         req = cli_write_andx_send(NULL, self->ev, self->cli, fnum, mode,
 661                                   (uint8_t *)buf, offset, buflen);
 662         if (!py_tevent_req_wait_exc(self->ev, req)) {
 663                 return NULL;
 664         }
 665         status = cli_write_andx_recv(req, &written);
 666         TALLOC_FREE(req);
 667
 668         if (!NT_STATUS_IS_OK(status)) {
 669                 PyErr_SetNTSTATUS(status);
 670                 return NULL;
 671         }
 672         return Py_BuildValue("K", (unsigned long long)written);
 673 }
 674
 675 static PyObject *py_cli_read(struct py_cli_state *self, PyObject *args,
 676                              PyObject *kwds)
 677 {
 678         int fnum;
 679         unsigned long long offset;
 680         unsigned size;
 681         struct tevent_req *req;
 682         NTSTATUS status;
 683         uint8_t *buf;
 684         ssize_t buflen;
 685         PyObject *result;
 686
 687         static const char *kwlist[] = {
 688                 "fnum", "offset", "size", NULL };
 689
 690         if (!ParseTupleAndKeywords(
 691                     args, kwds, "IKI", kwlist, &fnum, &offset,
 692                     &size)) {
 693                 return NULL;
 694         }
 695
 696         req = cli_read_andx_send(NULL, self->ev, self->cli, fnum,
 697                                  offset, size);
 698         if (!py_tevent_req_wait_exc(self->ev, req)) {
 699                 return NULL;
 700         }
 701         status = cli_read_andx_recv(req, &buflen, &buf);
 702
 703         if (!NT_STATUS_IS_OK(status)) {
 704                 TALLOC_FREE(req);
 705                 PyErr_SetNTSTATUS(status);
 706                 return NULL;
 707         }
 708         result = Py_BuildValue("s#", (char *)buf, (int)buflen);
 709         TALLOC_FREE(req);
 710         return result;
 711 }
 712
 713 static PyObject *py_cli_ftruncate(struct py_cli_state *self, PyObject *args,
 714                                   PyObject *kwds)
 715 {
 716         int fnum;
 717         unsigned long long size;
 718         struct tevent_req *req;
 719         NTSTATUS status;
 720
 721         static const char *kwlist[] = {
 722                 "fnum", "size", NULL };
 723
 724         if (!ParseTupleAndKeywords(
 725                     args, kwds, "IK", kwlist, &fnum, &size)) {
 726                 return NULL;
 727         }
 728
 729         req = cli_ftruncate_send(NULL, self->ev, self->cli, fnum, size);
 730         if (!py_tevent_req_wait_exc(self->ev, req)) {
 731                 return NULL;
 732         }
 733         status = cli_ftruncate_recv(req);
 734         TALLOC_FREE(req);
 735
 736         if (!NT_STATUS_IS_OK(status)) {
 737                 PyErr_SetNTSTATUS(status);
 738                 return NULL;
 739         }
 740         Py_RETURN_NONE;
 741 }
 742
 743 static PyObject *py_cli_delete_on_close(struct py_cli_state *self,
 744                                         PyObject *args,
 745                                         PyObject *kwds)
 746 {
 747         unsigned fnum, flag;
 748         struct tevent_req *req;
 749         NTSTATUS status;
 750
 751         static const char *kwlist[] = {
 752                 "fnum", "flag", NULL };
 753
 754         if (!ParseTupleAndKeywords(
 755                     args, kwds, "II", kwlist, &fnum, &flag)) {
 756                 return NULL;
 757         }
 758
 759         req = cli_nt_delete_on_close_send(NULL, self->ev, self->cli, fnum,
 760                                           flag);
 761         if (!py_tevent_req_wait_exc(self->ev, req)) {
 762                 return NULL;
 763         }
 764         status = cli_nt_delete_on_close_recv(req);
 765         TALLOC_FREE(req);
 766
 767         if (!NT_STATUS_IS_OK(status)) {
 768                 PyErr_SetNTSTATUS(status);
 769                 return NULL;
 770         }
 771         Py_RETURN_NONE;
 772 }
 773
 774 static PyObject *py_cli_list(struct py_cli_state *self,
 775                              PyObject *args,
 776                              PyObject *kwds)
 777 {
 778         char *mask;
 779         unsigned attribute =
 780                 FILE_ATTRIBUTE_DIRECTORY |
 781                 FILE_ATTRIBUTE_SYSTEM |
 782                 FILE_ATTRIBUTE_HIDDEN;
 783         unsigned info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 784         struct tevent_req *req;
 785         NTSTATUS status;
 786         struct file_info *finfos;
 787         size_t i, num_finfos;
 788         PyObject *result;
 789
 790         const char *kwlist[] = {
 791                 "mask", "attribute", "info_level", NULL
 792         };
 793
 794         if (!ParseTupleAndKeywords(
 795                     args, kwds, "s|II", kwlist,
 796                     &mask, &attribute, &info_level)) {
 797                 return NULL;
 798         }
 799
 800         req = cli_list_send(NULL, self->ev, self->cli, mask, attribute,
 801                             info_level);
 802         if (!py_tevent_req_wait_exc(self->ev, req)) {
 803                 return NULL;
 804         }
 805         status = cli_list_recv(req, NULL, &finfos, &num_finfos);
 806         TALLOC_FREE(req);
 807
 808         if (!NT_STATUS_IS_OK(status)) {
 809                 PyErr_SetNTSTATUS(status);
 810                 return NULL;
 811         }
 812
 813         result = Py_BuildValue("[]");
 814         if (result == NULL) {
 815                 return NULL;
 816         }
 817
 818         for (i=0; i<num_finfos; i++) {
 819                 struct file_info *finfo = &finfos[i];
 820                 PyObject *file;
 821                 int ret;
 822
 823                 file = Py_BuildValue(
 824                         "{s:s,s:i}",
 825                         "name", finfo->name,
 826                         "mode", (int)finfo->mode);
 827                 if (file == NULL) {
 828                         Py_XDECREF(result);
 829                         return NULL;
 830                 }
 831
 832                 ret = PyList_Append(result, file);
 833                 if (ret == -1) {
 834                         Py_XDECREF(result);
 835                         return NULL;
 836                 }
 837         }
 838
 839         return result;
 840 }
 841
 842 static PyMethodDef py_cli_state_methods[] = {
 843         { "create", (PyCFunction)py_cli_create, METH_VARARGS|METH_KEYWORDS,
 844           "Open a file" },
 845         { "close", (PyCFunction)py_cli_close, METH_VARARGS,
 846           "Close a file handle" },
 847         { "write", (PyCFunction)py_cli_write, METH_VARARGS|METH_KEYWORDS,
 848           "Write to a file handle" },
 849         { "read", (PyCFunction)py_cli_read, METH_VARARGS|METH_KEYWORDS,
 850           "Read from a file handle" },
 851         { "truncate", (PyCFunction)py_cli_ftruncate,
 852           METH_VARARGS|METH_KEYWORDS,
 853           "Truncate a file" },
 854         { "delete_on_close", (PyCFunction)py_cli_delete_on_close,
 855           METH_VARARGS|METH_KEYWORDS,
 856           "Set/Reset the delete on close flag" },
 857         { "readdir", (PyCFunction)py_cli_list,
 858           METH_VARARGS|METH_KEYWORDS,
 859           "List a directory" },
 860         { "get_oplock_break", (PyCFunction)py_cli_get_oplock_break,
 861           METH_VARARGS, "Wait for an oplock break" },
 862         { NULL, NULL, 0, NULL }
 863 };
 864
 865 static PyTypeObject py_cli_state_type = {
 866         PyObject_HEAD_INIT(NULL)
 867         .tp_name = "libsmb_samba_internal.Conn",
 868         .tp_basicsize = sizeof(struct py_cli_state),
 869         .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
 870         .tp_doc = "libsmb connection",
 871         .tp_new = py_cli_state_new,
 872         .tp_init = (initproc)py_cli_state_init,
 873         .tp_dealloc = (destructor)py_cli_state_dealloc,
 874         .tp_methods = py_cli_state_methods,
 875 };
 876
 877 static PyMethodDef py_libsmb_methods[] = {
 878         { NULL },
 879 };
 880
 881 void initlibsmb_samba_internal(void);
 882 void initlibsmb_samba_internal(void)
 883 {
 884         PyObject *m;
 885
 886         talloc_stackframe();
 887
 888         m = Py_InitModule3("libsmb_samba_internal", py_libsmb_methods,
 889                            "libsmb wrapper");
 890
 891         if (PyType_Ready(&py_cli_state_type) < 0) {
 892                 return;
 893         }
 894         Py_INCREF(&py_cli_state_type);
 895         PyModule_AddObject(m, "Conn", (PyObject *)&py_cli_state_type);
 896 }