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 * const *" 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 * const *keywords,
  60                                  ...)
  61 {
  62         char **_keywords = discard_const_p(char *, keywords);
  63         va_list a;
  64         int ret;
  65         va_start(a, keywords);
  66         ret = PyArg_VaParseTupleAndKeywords(args, kw, format,
  67                                             _keywords, a);
  68         va_end(a);
  69         return ret;
  70 }
  71
  72 struct py_cli_thread;
  73
  74 struct py_cli_oplock_break {
  75         uint16_t fnum;
  76         uint8_t level;
  77 };
  78
  79 struct py_cli_state {
  80         PyObject_HEAD
  81         struct cli_state *cli;
  82         struct tevent_context *ev;
  83         struct py_cli_thread *thread_state;
  84
  85         struct tevent_req *oplock_waiter;
  86         struct py_cli_oplock_break *oplock_breaks;
  87         struct py_tevent_cond *oplock_cond;
  88 };
  89
  90 #if HAVE_PTHREAD
  91
  92 #include <pthread.h>
  93
  94 struct py_cli_thread {
  95
  96         /*
  97          * Pipe to make the poll thread wake up in our destructor, so
  98          * that we can exit and join the thread.
  99          */
 100         int shutdown_pipe[2];
 101         struct tevent_fd *shutdown_fde;
 102         bool do_shutdown;
 103         pthread_t id;
 104
 105         /*
 106          * Thread state to release the GIL during the poll(2) syscall
 107          */
 108         PyThreadState *py_threadstate;
 109 };
 110
 111 static void *py_cli_state_poll_thread(void *private_data)
 112 {
 113         struct py_cli_state *self = (struct py_cli_state *)private_data;
 114         struct py_cli_thread *t = self->thread_state;
 115         PyGILState_STATE gstate;
 116
 117         gstate = PyGILState_Ensure();
 118
 119         while (!t->do_shutdown) {
 120                 int ret;
 121                 ret = tevent_loop_once(self->ev);
 122                 assert(ret == 0);
 123         }
 124         PyGILState_Release(gstate);
 125         return NULL;
 126 }
 127
 128 static void py_cli_state_trace_callback(enum tevent_trace_point point,
 129                                         void *private_data)
 130 {
 131         struct py_cli_state *self = (struct py_cli_state *)private_data;
 132         struct py_cli_thread *t = self->thread_state;
 133
 134         switch(point) {
 135         case TEVENT_TRACE_BEFORE_WAIT:
 136                 assert(t->py_threadstate == NULL);
 137                 t->py_threadstate = PyEval_SaveThread();
 138                 break;
 139         case TEVENT_TRACE_AFTER_WAIT:
 140                 assert(t->py_threadstate != NULL);
 141                 PyEval_RestoreThread(t->py_threadstate);
 142                 t->py_threadstate = NULL;
 143                 break;
 144         default:
 145                 break;
 146         }
 147 }
 148
 149 static void py_cli_state_shutdown_handler(struct tevent_context *ev,
 150                                           struct tevent_fd *fde,
 151                                           uint16_t flags,
 152                                           void *private_data)
 153 {
 154         struct py_cli_state *self = (struct py_cli_state *)private_data;
 155         struct py_cli_thread *t = self->thread_state;
 156
 157         if ((flags & TEVENT_FD_READ) == 0) {
 158                 return;
 159         }
 160         TALLOC_FREE(t->shutdown_fde);
 161         t->do_shutdown = true;
 162 }
 163
 164 static int py_cli_thread_destructor(struct py_cli_thread *t)
 165 {
 166         char c = 0;
 167         ssize_t written;
 168         int ret;
 169
 170         do {
 171                 /*
 172                  * This will wake the poll thread from the poll(2)
 173                  */
 174                 written = write(t->shutdown_pipe[1], &c, 1);
 175         } while ((written == -1) && (errno == EINTR));
 176
 177         /*
 178          * Allow the poll thread to do its own cleanup under the GIL
 179          */
 180         Py_BEGIN_ALLOW_THREADS
 181         ret = pthread_join(t->id, NULL);
 182         Py_END_ALLOW_THREADS
 183         assert(ret == 0);
 184
 185         if (t->shutdown_pipe[0] != -1) {
 186                 close(t->shutdown_pipe[0]);
 187                 t->shutdown_pipe[0] = -1;
 188         }
 189         if (t->shutdown_pipe[1] != -1) {
 190                 close(t->shutdown_pipe[1]);
 191                 t->shutdown_pipe[1] = -1;
 192         }
 193         return 0;
 194 }
 195
 196 static bool py_cli_state_setup_ev(struct py_cli_state *self)
 197 {
 198         struct py_cli_thread *t = NULL;
 199         int ret;
 200
 201         self->ev = tevent_context_init_byname(NULL, "poll_mt");
 202         if (self->ev == NULL) {
 203                 goto fail;
 204         }
 205         samba_tevent_set_debug(self->ev, "pylibsmb_tevent_mt");
 206         tevent_set_trace_callback(self->ev, py_cli_state_trace_callback, self);
 207
 208         self->thread_state = talloc_zero(NULL, struct py_cli_thread);
 209         if (self->thread_state == NULL) {
 210                 goto fail;
 211         }
 212         t = self->thread_state;
 213
 214         ret = pipe(t->shutdown_pipe);
 215         if (ret == -1) {
 216                 goto fail;
 217         }
 218         t->shutdown_fde = tevent_add_fd(
 219                 self->ev, self->ev, t->shutdown_pipe[0], TEVENT_FD_READ,
 220                 py_cli_state_shutdown_handler, self);
 221         if (t->shutdown_fde == NULL) {
 222                 goto fail;
 223         }
 224
 225         PyEval_InitThreads();
 226
 227         ret = pthread_create(&t->id, NULL, py_cli_state_poll_thread, self);
 228         if (ret != 0) {
 229                 goto fail;
 230         }
 231         talloc_set_destructor(self->thread_state, py_cli_thread_destructor);
 232         return true;
 233
 234 fail:
 235         if (t != NULL) {
 236                 TALLOC_FREE(t->shutdown_fde);
 237
 238                 if (t->shutdown_pipe[0] != -1) {
 239                         close(t->shutdown_pipe[0]);
 240                         t->shutdown_pipe[0] = -1;
 241                 }
 242                 if (t->shutdown_pipe[1] != -1) {
 243                         close(t->shutdown_pipe[1]);
 244                         t->shutdown_pipe[1] = -1;
 245                 }
 246         }
 247
 248         TALLOC_FREE(self->thread_state);
 249         TALLOC_FREE(self->ev);
 250         return false;
 251 }
 252
 253 struct py_tevent_cond {
 254         pthread_mutex_t mutex;
 255         pthread_cond_t cond;
 256         bool is_done;
 257 };
 258
 259 static void py_tevent_signalme(struct tevent_req *req);
 260
 261 static int py_tevent_cond_wait(struct py_tevent_cond *cond)
 262 {
 263         int ret, result;
 264
 265         result = pthread_mutex_init(&cond->mutex, NULL);
 266         if (result != 0) {
 267                 goto fail;
 268         }
 269         result = pthread_cond_init(&cond->cond, NULL);
 270         if (result != 0) {
 271                 goto fail_mutex;
 272         }
 273
 274         result = pthread_mutex_lock(&cond->mutex);
 275         if (result != 0) {
 276                 goto fail_cond;
 277         }
 278
 279         cond->is_done = false;
 280
 281         while (!cond->is_done) {
 282
 283                 Py_BEGIN_ALLOW_THREADS
 284                 result = pthread_cond_wait(&cond->cond, &cond->mutex);
 285                 Py_END_ALLOW_THREADS
 286
 287                 if (result != 0) {
 288                         goto fail_unlock;
 289                 }
 290         }
 291
 292 fail_unlock:
 293         ret = pthread_mutex_unlock(&cond->mutex);
 294         assert(ret == 0);
 295 fail_cond:
 296         ret = pthread_cond_destroy(&cond->cond);
 297         assert(ret == 0);
 298 fail_mutex:
 299         ret = pthread_mutex_destroy(&cond->mutex);
 300         assert(ret == 0);
 301 fail:
 302         return result;
 303 }
 304
 305 static int py_tevent_req_wait(struct tevent_context *ev,
 306                               struct tevent_req *req)
 307 {
 308         struct py_tevent_cond cond;
 309         tevent_req_set_callback(req, py_tevent_signalme, &cond);
 310         return py_tevent_cond_wait(&cond);
 311 }
 312
 313 static void py_tevent_cond_signal(struct py_tevent_cond *cond)
 314 {
 315         int ret;
 316
 317         ret = pthread_mutex_lock(&cond->mutex);
 318         assert(ret == 0);
 319
 320         cond->is_done = true;
 321
 322         ret = pthread_cond_signal(&cond->cond);
 323         assert(ret == 0);
 324         ret = pthread_mutex_unlock(&cond->mutex);
 325         assert(ret == 0);
 326 }
 327
 328 static void py_tevent_signalme(struct tevent_req *req)
 329 {
 330         struct py_tevent_cond *cond = (struct py_tevent_cond *)
 331                 tevent_req_callback_data_void(req);
 332
 333         py_tevent_cond_signal(cond);
 334 }
 335
 336 #else
 337
 338 static bool py_cli_state_setup_ev(struct py_cli_state *self)
 339 {
 340         self->ev = tevent_context_init(NULL);
 341         if (self->ev == NULL) {
 342                 return false;
 343         }
 344
 345         samba_tevent_set_debug(self->ev, "pylibsmb_tevent");
 346
 347         return true;
 348 }
 349
 350 static int py_tevent_req_wait(struct tevent_context *ev,
 351                               struct tevent_req *req)
 352 {
 353         while (tevent_req_is_in_progress(req)) {
 354                 int ret;
 355
 356                 ret = tevent_loop_once(ev);
 357                 if (ret != 0) {
 358                         return ret;
 359                 }
 360         }
 361         return 0;
 362 }
 363
 364 #endif
 365
 366 static bool py_tevent_req_wait_exc(struct tevent_context *ev,
 367                                    struct tevent_req *req)
 368 {
 369         int ret;
 370
 371         if (req == NULL) {
 372                 PyErr_NoMemory();
 373                 return false;
 374         }
 375         ret = py_tevent_req_wait(ev, req);
 376         if (ret != 0) {
 377                 TALLOC_FREE(req);
 378                 errno = ret;
 379                 PyErr_SetFromErrno(PyExc_RuntimeError);
 380                 return false;
 381         }
 382         return true;
 383 }
 384
 385 static PyObject *py_cli_state_new(PyTypeObject *type, PyObject *args,
 386                                   PyObject *kwds)
 387 {
 388         struct py_cli_state *self;
 389
 390         self = (struct py_cli_state *)type->tp_alloc(type, 0);
 391         if (self == NULL) {
 392                 return NULL;
 393         }
 394         self->cli = NULL;
 395         self->ev = NULL;
 396         self->thread_state = NULL;
 397         self->oplock_waiter = NULL;
 398         self->oplock_cond = NULL;
 399         self->oplock_breaks = NULL;
 400         return (PyObject *)self;
 401 }
 402
 403 static void py_cli_got_oplock_break(struct tevent_req *req);
 404
 405 static int py_cli_state_init(struct py_cli_state *self, PyObject *args,
 406                              PyObject *kwds)
 407 {
 408         NTSTATUS status;
 409         char *host, *share;
 410         PyObject *creds = NULL;
 411         struct cli_credentials *cli_creds;
 412         struct tevent_req *req;
 413         bool ret;
 414
 415         static const char *kwlist[] = {
 416                 "host", "share", "credentials", NULL
 417         };
 418
 419         PyTypeObject *py_type_Credentials = get_pytype(
 420                 "samba.credentials", "Credentials");
 421         if (py_type_Credentials == NULL) {
 422                 return -1;
 423         }
 424
 425         ret = ParseTupleAndKeywords(
 426                 args, kwds, "ss|O!", kwlist,
 427                 &host, &share, py_type_Credentials, &creds);
 428
 429         Py_DECREF(py_type_Credentials);
 430
 431         if (!ret) {
 432                 return -1;
 433         }
 434
 435         if (!py_cli_state_setup_ev(self)) {
 436                 return -1;
 437         }
 438
 439         if (creds == NULL) {
 440                 cli_creds = cli_credentials_init_anon(NULL);
 441         } else {
 442                 cli_creds = PyCredentials_AsCliCredentials(creds);
 443         }
 444
 445         req = cli_full_connection_creds_send(
 446                 NULL, self->ev, "myname", host, NULL, 0, share, "?????",
 447                 cli_creds, 0, 0);
 448         if (!py_tevent_req_wait_exc(self->ev, req)) {
 449                 return -1;
 450         }
 451         status = cli_full_connection_creds_recv(req, &self->cli);
 452         TALLOC_FREE(req);
 453
 454         if (!NT_STATUS_IS_OK(status)) {
 455                 PyErr_SetNTSTATUS(status);
 456                 return -1;
 457         }
 458
 459         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 460                 self->ev, self->ev, self->cli);
 461         if (self->oplock_waiter == NULL) {
 462                 PyErr_NoMemory();
 463                 return -1;
 464         }
 465         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 466                                 self);
 467         return 0;
 468 }
 469
 470 static void py_cli_got_oplock_break(struct tevent_req *req)
 471 {
 472         struct py_cli_state *self = (struct py_cli_state *)
 473                 tevent_req_callback_data_void(req);
 474         struct py_cli_oplock_break b;
 475         struct py_cli_oplock_break *tmp;
 476         size_t num_breaks;
 477         NTSTATUS status;
 478
 479         status = cli_smb_oplock_break_waiter_recv(req, &b.fnum, &b.level);
 480         TALLOC_FREE(req);
 481         self->oplock_waiter = NULL;
 482
 483         if (!NT_STATUS_IS_OK(status)) {
 484                 return;
 485         }
 486
 487         num_breaks = talloc_array_length(self->oplock_breaks);
 488         tmp = talloc_realloc(self->ev, self->oplock_breaks,
 489                              struct py_cli_oplock_break, num_breaks+1);
 490         if (tmp == NULL) {
 491                 return;
 492         }
 493         self->oplock_breaks = tmp;
 494         self->oplock_breaks[num_breaks] = b;
 495
 496         if (self->oplock_cond != NULL) {
 497                 py_tevent_cond_signal(self->oplock_cond);
 498         }
 499
 500         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 501                 self->ev, self->ev, self->cli);
 502         if (self->oplock_waiter == NULL) {
 503                 return;
 504         }
 505         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 506                                 self);
 507 }
 508
 509 static PyObject *py_cli_get_oplock_break(struct py_cli_state *self,
 510                                          PyObject *args)
 511 {
 512         size_t num_oplock_breaks;
 513
 514         if (!PyArg_ParseTuple(args, "")) {
 515                 return NULL;
 516         }
 517
 518         if (self->oplock_cond != NULL) {
 519                 errno = EBUSY;
 520                 PyErr_SetFromErrno(PyExc_RuntimeError);
 521                 return NULL;
 522         }
 523
 524         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 525
 526         if (num_oplock_breaks == 0) {
 527                 struct py_tevent_cond cond;
 528                 int ret;
 529
 530                 self->oplock_cond = &cond;
 531                 ret = py_tevent_cond_wait(&cond);
 532                 self->oplock_cond = NULL;
 533
 534                 if (ret != 0) {
 535                         errno = ret;
 536                         PyErr_SetFromErrno(PyExc_RuntimeError);
 537                         return NULL;
 538                 }
 539         }
 540
 541         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 542         if (num_oplock_breaks > 0) {
 543                 PyObject *result;
 544
 545                 result = Py_BuildValue(
 546                         "{s:i,s:i}",
 547                         "fnum", self->oplock_breaks[0].fnum,
 548                         "level", self->oplock_breaks[0].level);
 549
 550                 memmove(&self->oplock_breaks[0], &self->oplock_breaks[1],
 551                         sizeof(self->oplock_breaks[0]) *
 552                         (num_oplock_breaks - 1));
 553                 self->oplock_breaks = talloc_realloc(
 554                         NULL, self->oplock_breaks, struct py_cli_oplock_break,
 555                         num_oplock_breaks - 1);
 556
 557                 return result;
 558         }
 559         Py_RETURN_NONE;
 560 }
 561
 562 static void py_cli_state_dealloc(struct py_cli_state *self)
 563 {
 564         TALLOC_FREE(self->thread_state);
 565         TALLOC_FREE(self->oplock_waiter);
 566         TALLOC_FREE(self->ev);
 567
 568         if (self->cli != NULL) {
 569                 cli_shutdown(self->cli);
 570                 self->cli = NULL;
 571         }
 572         self->ob_type->tp_free((PyObject *)self);
 573 }
 574
 575 static PyObject *py_cli_create(struct py_cli_state *self, PyObject *args,
 576                                PyObject *kwds)
 577 {
 578         char *fname;
 579         unsigned CreateFlags = 0;
 580         unsigned DesiredAccess = FILE_GENERIC_READ;
 581         unsigned FileAttributes = 0;
 582         unsigned ShareAccess = 0;
 583         unsigned CreateDisposition = FILE_OPEN;
 584         unsigned CreateOptions = 0;
 585         unsigned SecurityFlags = 0;
 586         uint16_t fnum;
 587         struct tevent_req *req;
 588         NTSTATUS status;
 589
 590         static const char *kwlist[] = {
 591                 "Name", "CreateFlags", "DesiredAccess", "FileAttributes",
 592                 "ShareAccess", "CreateDisposition", "CreateOptions",
 593                 "SecurityFlags", NULL };
 594
 595         if (!ParseTupleAndKeywords(
 596                     args, kwds, "s|IIIIIII", kwlist,
 597                     &fname, &CreateFlags, &DesiredAccess, &FileAttributes,
 598                     &ShareAccess, &CreateDisposition, &CreateOptions,
 599                     &SecurityFlags)) {
 600                 return NULL;
 601         }
 602
 603         req = cli_ntcreate_send(NULL, self->ev, self->cli, fname, CreateFlags,
 604                                 DesiredAccess, FileAttributes, ShareAccess,
 605                                 CreateDisposition, CreateOptions,
 606                                 SecurityFlags);
 607         if (!py_tevent_req_wait_exc(self->ev, req)) {
 608                 return NULL;
 609         }
 610         status = cli_ntcreate_recv(req, &fnum, NULL);
 611         TALLOC_FREE(req);
 612
 613         if (!NT_STATUS_IS_OK(status)) {
 614                 PyErr_SetNTSTATUS(status);
 615                 return NULL;
 616         }
 617         return Py_BuildValue("I", (unsigned)fnum);
 618 }
 619
 620 static PyObject *py_cli_close(struct py_cli_state *self, PyObject *args)
 621 {
 622         struct tevent_req *req;
 623         int fnum;
 624         NTSTATUS status;
 625
 626         if (!PyArg_ParseTuple(args, "i", &fnum)) {
 627                 return NULL;
 628         }
 629
 630         req = cli_close_send(NULL, self->ev, self->cli, fnum);
 631         if (!py_tevent_req_wait_exc(self->ev, req)) {
 632                 return NULL;
 633         }
 634         status = cli_close_recv(req);
 635         TALLOC_FREE(req);
 636
 637         if (!NT_STATUS_IS_OK(status)) {
 638                 PyErr_SetNTSTATUS(status);
 639                 return NULL;
 640         }
 641         Py_RETURN_NONE;
 642 }
 643
 644 static PyObject *py_cli_write(struct py_cli_state *self, PyObject *args,
 645                               PyObject *kwds)
 646 {
 647         int fnum;
 648         unsigned mode = 0;
 649         char *buf;
 650         Py_ssize_t buflen;
 651         unsigned long long offset;
 652         struct tevent_req *req;
 653         NTSTATUS status;
 654         size_t written;
 655
 656         static const char *kwlist[] = {
 657                 "fnum", "buffer", "offset", "mode", NULL };
 658
 659         if (!ParseTupleAndKeywords(
 660                     args, kwds, "Is#K|I", kwlist,
 661                     &fnum, &buf, &buflen, &offset, &mode)) {
 662                 return NULL;
 663         }
 664
 665         req = cli_write_andx_send(NULL, self->ev, self->cli, fnum, mode,
 666                                   (uint8_t *)buf, offset, buflen);
 667         if (!py_tevent_req_wait_exc(self->ev, req)) {
 668                 return NULL;
 669         }
 670         status = cli_write_andx_recv(req, &written);
 671         TALLOC_FREE(req);
 672
 673         if (!NT_STATUS_IS_OK(status)) {
 674                 PyErr_SetNTSTATUS(status);
 675                 return NULL;
 676         }
 677         return Py_BuildValue("K", (unsigned long long)written);
 678 }
 679
 680 static PyObject *py_cli_read(struct py_cli_state *self, PyObject *args,
 681                              PyObject *kwds)
 682 {
 683         int fnum;
 684         unsigned long long offset;
 685         unsigned size;
 686         struct tevent_req *req;
 687         NTSTATUS status;
 688         uint8_t *buf;
 689         ssize_t buflen;
 690         PyObject *result;
 691
 692         static const char *kwlist[] = {
 693                 "fnum", "offset", "size", NULL };
 694
 695         if (!ParseTupleAndKeywords(
 696                     args, kwds, "IKI", kwlist, &fnum, &offset,
 697                     &size)) {
 698                 return NULL;
 699         }
 700
 701         req = cli_read_andx_send(NULL, self->ev, self->cli, fnum,
 702                                  offset, size);
 703         if (!py_tevent_req_wait_exc(self->ev, req)) {
 704                 return NULL;
 705         }
 706         status = cli_read_andx_recv(req, &buflen, &buf);
 707
 708         if (!NT_STATUS_IS_OK(status)) {
 709                 TALLOC_FREE(req);
 710                 PyErr_SetNTSTATUS(status);
 711                 return NULL;
 712         }
 713         result = Py_BuildValue("s#", (char *)buf, (int)buflen);
 714         TALLOC_FREE(req);
 715         return result;
 716 }
 717
 718 static PyObject *py_cli_ftruncate(struct py_cli_state *self, PyObject *args,
 719                                   PyObject *kwds)
 720 {
 721         int fnum;
 722         unsigned long long size;
 723         struct tevent_req *req;
 724         NTSTATUS status;
 725
 726         static const char *kwlist[] = {
 727                 "fnum", "size", NULL };
 728
 729         if (!ParseTupleAndKeywords(
 730                     args, kwds, "IK", kwlist, &fnum, &size)) {
 731                 return NULL;
 732         }
 733
 734         req = cli_ftruncate_send(NULL, self->ev, self->cli, fnum, size);
 735         if (!py_tevent_req_wait_exc(self->ev, req)) {
 736                 return NULL;
 737         }
 738         status = cli_ftruncate_recv(req);
 739         TALLOC_FREE(req);
 740
 741         if (!NT_STATUS_IS_OK(status)) {
 742                 PyErr_SetNTSTATUS(status);
 743                 return NULL;
 744         }
 745         Py_RETURN_NONE;
 746 }
 747
 748 static PyObject *py_cli_delete_on_close(struct py_cli_state *self,
 749                                         PyObject *args,
 750                                         PyObject *kwds)
 751 {
 752         unsigned fnum, flag;
 753         struct tevent_req *req;
 754         NTSTATUS status;
 755
 756         static const char *kwlist[] = {
 757                 "fnum", "flag", NULL };
 758
 759         if (!ParseTupleAndKeywords(
 760                     args, kwds, "II", kwlist, &fnum, &flag)) {
 761                 return NULL;
 762         }
 763
 764         req = cli_nt_delete_on_close_send(NULL, self->ev, self->cli, fnum,
 765                                           flag);
 766         if (!py_tevent_req_wait_exc(self->ev, req)) {
 767                 return NULL;
 768         }
 769         status = cli_nt_delete_on_close_recv(req);
 770         TALLOC_FREE(req);
 771
 772         if (!NT_STATUS_IS_OK(status)) {
 773                 PyErr_SetNTSTATUS(status);
 774                 return NULL;
 775         }
 776         Py_RETURN_NONE;
 777 }
 778
 779 static PyObject *py_cli_list(struct py_cli_state *self,
 780                              PyObject *args,
 781                              PyObject *kwds)
 782 {
 783         char *mask;
 784         unsigned attribute =
 785                 FILE_ATTRIBUTE_DIRECTORY |
 786                 FILE_ATTRIBUTE_SYSTEM |
 787                 FILE_ATTRIBUTE_HIDDEN;
 788         unsigned info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 789         struct tevent_req *req;
 790         NTSTATUS status;
 791         struct file_info *finfos;
 792         size_t i, num_finfos;
 793         PyObject *result;
 794
 795         const char *kwlist[] = {
 796                 "mask", "attribute", "info_level", NULL
 797         };
 798
 799         if (!ParseTupleAndKeywords(
 800                     args, kwds, "s|II", kwlist,
 801                     &mask, &attribute, &info_level)) {
 802                 return NULL;
 803         }
 804
 805         req = cli_list_send(NULL, self->ev, self->cli, mask, attribute,
 806                             info_level);
 807         if (!py_tevent_req_wait_exc(self->ev, req)) {
 808                 return NULL;
 809         }
 810         status = cli_list_recv(req, NULL, &finfos, &num_finfos);
 811         TALLOC_FREE(req);
 812
 813         if (!NT_STATUS_IS_OK(status)) {
 814                 PyErr_SetNTSTATUS(status);
 815                 return NULL;
 816         }
 817
 818         result = Py_BuildValue("[]");
 819         if (result == NULL) {
 820                 return NULL;
 821         }
 822
 823         for (i=0; i<num_finfos; i++) {
 824                 struct file_info *finfo = &finfos[i];
 825                 PyObject *file;
 826                 int ret;
 827
 828                 file = Py_BuildValue(
 829                         "{s:s,s:i}",
 830                         "name", finfo->name,
 831                         "mode", (int)finfo->mode);
 832                 if (file == NULL) {
 833                         Py_XDECREF(result);
 834                         return NULL;
 835                 }
 836
 837                 ret = PyList_Append(result, file);
 838                 if (ret == -1) {
 839                         Py_XDECREF(result);
 840                         return NULL;
 841                 }
 842         }
 843
 844         return result;
 845 }
 846
 847 static PyMethodDef py_cli_state_methods[] = {
 848         { "create", (PyCFunction)py_cli_create, METH_VARARGS|METH_KEYWORDS,
 849           "Open a file" },
 850         { "close", (PyCFunction)py_cli_close, METH_VARARGS,
 851           "Close a file handle" },
 852         { "write", (PyCFunction)py_cli_write, METH_VARARGS|METH_KEYWORDS,
 853           "Write to a file handle" },
 854         { "read", (PyCFunction)py_cli_read, METH_VARARGS|METH_KEYWORDS,
 855           "Read from a file handle" },
 856         { "truncate", (PyCFunction)py_cli_ftruncate,
 857           METH_VARARGS|METH_KEYWORDS,
 858           "Truncate a file" },
 859         { "delete_on_close", (PyCFunction)py_cli_delete_on_close,
 860           METH_VARARGS|METH_KEYWORDS,
 861           "Set/Reset the delete on close flag" },
 862         { "readdir", (PyCFunction)py_cli_list,
 863           METH_VARARGS|METH_KEYWORDS,
 864           "List a directory" },
 865         { "get_oplock_break", (PyCFunction)py_cli_get_oplock_break,
 866           METH_VARARGS, "Wait for an oplock break" },
 867         { NULL, NULL, 0, NULL }
 868 };
 869
 870 static PyTypeObject py_cli_state_type = {
 871         PyObject_HEAD_INIT(NULL)
 872         .tp_name = "libsmb_samba_internal.Conn",
 873         .tp_basicsize = sizeof(struct py_cli_state),
 874         .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
 875         .tp_doc = "libsmb connection",
 876         .tp_new = py_cli_state_new,
 877         .tp_init = (initproc)py_cli_state_init,
 878         .tp_dealloc = (destructor)py_cli_state_dealloc,
 879         .tp_methods = py_cli_state_methods,
 880 };
 881
 882 static PyMethodDef py_libsmb_methods[] = {
 883         { NULL },
 884 };
 885
 886 void initlibsmb_samba_internal(void);
 887 void initlibsmb_samba_internal(void)
 888 {
 889         PyObject *m;
 890
 891         talloc_stackframe();
 892
 893         m = Py_InitModule3("libsmb_samba_internal", py_libsmb_methods,
 894                            "libsmb wrapper");
 895
 896         if (PyType_Ready(&py_cli_state_type) < 0) {
 897                 return;
 898         }
 899         Py_INCREF(&py_cli_state_type);
 900         PyModule_AddObject(m, "Conn", (PyObject *)&py_cli_state_type);
 901 }