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_send(
 446                 NULL, self->ev, "myname", host, NULL, 0, share, "?????",
 447                 cli_credentials_get_username(cli_creds),
 448                 cli_credentials_get_domain(cli_creds),
 449                 cli_credentials_get_password(cli_creds),
 450                 0, 0);
 451         if (!py_tevent_req_wait_exc(self->ev, req)) {
 452                 return -1;
 453         }
 454         status = cli_full_connection_recv(req, &self->cli);
 455         TALLOC_FREE(req);
 456
 457         if (!NT_STATUS_IS_OK(status)) {
 458                 PyErr_SetNTSTATUS(status);
 459                 return -1;
 460         }
 461
 462         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 463                 self->ev, self->ev, self->cli);
 464         if (self->oplock_waiter == NULL) {
 465                 PyErr_NoMemory();
 466                 return -1;
 467         }
 468         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 469                                 self);
 470         return 0;
 471 }
 472
 473 static void py_cli_got_oplock_break(struct tevent_req *req)
 474 {
 475         struct py_cli_state *self = (struct py_cli_state *)
 476                 tevent_req_callback_data_void(req);
 477         struct py_cli_oplock_break b;
 478         struct py_cli_oplock_break *tmp;
 479         size_t num_breaks;
 480         NTSTATUS status;
 481
 482         status = cli_smb_oplock_break_waiter_recv(req, &b.fnum, &b.level);
 483         TALLOC_FREE(req);
 484         self->oplock_waiter = NULL;
 485
 486         if (!NT_STATUS_IS_OK(status)) {
 487                 return;
 488         }
 489
 490         num_breaks = talloc_array_length(self->oplock_breaks);
 491         tmp = talloc_realloc(self->ev, self->oplock_breaks,
 492                              struct py_cli_oplock_break, num_breaks+1);
 493         if (tmp == NULL) {
 494                 return;
 495         }
 496         self->oplock_breaks = tmp;
 497         self->oplock_breaks[num_breaks] = b;
 498
 499         if (self->oplock_cond != NULL) {
 500                 py_tevent_cond_signal(self->oplock_cond);
 501         }
 502
 503         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 504                 self->ev, self->ev, self->cli);
 505         if (self->oplock_waiter == NULL) {
 506                 return;
 507         }
 508         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 509                                 self);
 510 }
 511
 512 static PyObject *py_cli_get_oplock_break(struct py_cli_state *self,
 513                                          PyObject *args)
 514 {
 515         size_t num_oplock_breaks;
 516
 517         if (!PyArg_ParseTuple(args, "")) {
 518                 return NULL;
 519         }
 520
 521         if (self->oplock_cond != NULL) {
 522                 errno = EBUSY;
 523                 PyErr_SetFromErrno(PyExc_RuntimeError);
 524                 return NULL;
 525         }
 526
 527         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 528
 529         if (num_oplock_breaks == 0) {
 530                 struct py_tevent_cond cond;
 531                 int ret;
 532
 533                 self->oplock_cond = &cond;
 534                 ret = py_tevent_cond_wait(&cond);
 535                 self->oplock_cond = NULL;
 536
 537                 if (ret != 0) {
 538                         errno = ret;
 539                         PyErr_SetFromErrno(PyExc_RuntimeError);
 540                         return NULL;
 541                 }
 542         }
 543
 544         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 545         if (num_oplock_breaks > 0) {
 546                 PyObject *result;
 547
 548                 result = Py_BuildValue(
 549                         "{s:i,s:i}",
 550                         "fnum", self->oplock_breaks[0].fnum,
 551                         "level", self->oplock_breaks[0].level);
 552
 553                 memmove(&self->oplock_breaks[0], &self->oplock_breaks[1],
 554                         sizeof(self->oplock_breaks[0]) *
 555                         (num_oplock_breaks - 1));
 556                 self->oplock_breaks = talloc_realloc(
 557                         NULL, self->oplock_breaks, struct py_cli_oplock_break,
 558                         num_oplock_breaks - 1);
 559
 560                 return result;
 561         }
 562         Py_RETURN_NONE;
 563 }
 564
 565 static void py_cli_state_dealloc(struct py_cli_state *self)
 566 {
 567         TALLOC_FREE(self->thread_state);
 568         TALLOC_FREE(self->oplock_waiter);
 569         TALLOC_FREE(self->ev);
 570
 571         if (self->cli != NULL) {
 572                 cli_shutdown(self->cli);
 573                 self->cli = NULL;
 574         }
 575         self->ob_type->tp_free((PyObject *)self);
 576 }
 577
 578 static PyObject *py_cli_create(struct py_cli_state *self, PyObject *args,
 579                                PyObject *kwds)
 580 {
 581         char *fname;
 582         unsigned CreateFlags = 0;
 583         unsigned DesiredAccess = FILE_GENERIC_READ;
 584         unsigned FileAttributes = 0;
 585         unsigned ShareAccess = 0;
 586         unsigned CreateDisposition = FILE_OPEN;
 587         unsigned CreateOptions = 0;
 588         unsigned SecurityFlags = 0;
 589         uint16_t fnum;
 590         struct tevent_req *req;
 591         NTSTATUS status;
 592
 593         static const char *kwlist[] = {
 594                 "Name", "CreateFlags", "DesiredAccess", "FileAttributes",
 595                 "ShareAccess", "CreateDisposition", "CreateOptions",
 596                 "SecurityFlags", NULL };
 597
 598         if (!ParseTupleAndKeywords(
 599                     args, kwds, "s|IIIIIII", kwlist,
 600                     &fname, &CreateFlags, &DesiredAccess, &FileAttributes,
 601                     &ShareAccess, &CreateDisposition, &CreateOptions,
 602                     &SecurityFlags)) {
 603                 return NULL;
 604         }
 605
 606         req = cli_ntcreate_send(NULL, self->ev, self->cli, fname, CreateFlags,
 607                                 DesiredAccess, FileAttributes, ShareAccess,
 608                                 CreateDisposition, CreateOptions,
 609                                 SecurityFlags);
 610         if (!py_tevent_req_wait_exc(self->ev, req)) {
 611                 return NULL;
 612         }
 613         status = cli_ntcreate_recv(req, &fnum, NULL);
 614         TALLOC_FREE(req);
 615
 616         if (!NT_STATUS_IS_OK(status)) {
 617                 PyErr_SetNTSTATUS(status);
 618                 return NULL;
 619         }
 620         return Py_BuildValue("I", (unsigned)fnum);
 621 }
 622
 623 static PyObject *py_cli_close(struct py_cli_state *self, PyObject *args)
 624 {
 625         struct tevent_req *req;
 626         int fnum;
 627         NTSTATUS status;
 628
 629         if (!PyArg_ParseTuple(args, "i", &fnum)) {
 630                 return NULL;
 631         }
 632
 633         req = cli_close_send(NULL, self->ev, self->cli, fnum);
 634         if (!py_tevent_req_wait_exc(self->ev, req)) {
 635                 return NULL;
 636         }
 637         status = cli_close_recv(req);
 638         TALLOC_FREE(req);
 639
 640         if (!NT_STATUS_IS_OK(status)) {
 641                 PyErr_SetNTSTATUS(status);
 642                 return NULL;
 643         }
 644         Py_RETURN_NONE;
 645 }
 646
 647 static PyObject *py_cli_write(struct py_cli_state *self, PyObject *args,
 648                               PyObject *kwds)
 649 {
 650         int fnum;
 651         unsigned mode = 0;
 652         char *buf;
 653         int buflen;
 654         unsigned long long offset;
 655         struct tevent_req *req;
 656         NTSTATUS status;
 657         size_t written;
 658
 659         static const char *kwlist[] = {
 660                 "fnum", "buffer", "offset", "mode", NULL };
 661
 662         if (!ParseTupleAndKeywords(
 663                     args, kwds, "Is#K|I", kwlist,
 664                     &fnum, &buf, &buflen, &offset, &mode)) {
 665                 return NULL;
 666         }
 667
 668         req = cli_write_andx_send(NULL, self->ev, self->cli, fnum, mode,
 669                                   (uint8_t *)buf, offset, buflen);
 670         if (!py_tevent_req_wait_exc(self->ev, req)) {
 671                 return NULL;
 672         }
 673         status = cli_write_andx_recv(req, &written);
 674         TALLOC_FREE(req);
 675
 676         if (!NT_STATUS_IS_OK(status)) {
 677                 PyErr_SetNTSTATUS(status);
 678                 return NULL;
 679         }
 680         return Py_BuildValue("K", (unsigned long long)written);
 681 }
 682
 683 static PyObject *py_cli_read(struct py_cli_state *self, PyObject *args,
 684                              PyObject *kwds)
 685 {
 686         int fnum;
 687         unsigned long long offset;
 688         unsigned size;
 689         struct tevent_req *req;
 690         NTSTATUS status;
 691         uint8_t *buf;
 692         ssize_t buflen;
 693         PyObject *result;
 694
 695         static const char *kwlist[] = {
 696                 "fnum", "offset", "size", NULL };
 697
 698         if (!ParseTupleAndKeywords(
 699                     args, kwds, "IKI", kwlist, &fnum, &offset,
 700                     &size)) {
 701                 return NULL;
 702         }
 703
 704         req = cli_read_andx_send(NULL, self->ev, self->cli, fnum,
 705                                  offset, size);
 706         if (!py_tevent_req_wait_exc(self->ev, req)) {
 707                 return NULL;
 708         }
 709         status = cli_read_andx_recv(req, &buflen, &buf);
 710
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 TALLOC_FREE(req);
 713                 PyErr_SetNTSTATUS(status);
 714                 return NULL;
 715         }
 716         result = Py_BuildValue("s#", (char *)buf, (int)buflen);
 717         TALLOC_FREE(req);
 718         return result;
 719 }
 720
 721 static PyObject *py_cli_ftruncate(struct py_cli_state *self, PyObject *args,
 722                                   PyObject *kwds)
 723 {
 724         int fnum;
 725         unsigned long long size;
 726         struct tevent_req *req;
 727         NTSTATUS status;
 728
 729         static const char *kwlist[] = {
 730                 "fnum", "size", NULL };
 731
 732         if (!ParseTupleAndKeywords(
 733                     args, kwds, "IK", kwlist, &fnum, &size)) {
 734                 return NULL;
 735         }
 736
 737         req = cli_ftruncate_send(NULL, self->ev, self->cli, fnum, size);
 738         if (!py_tevent_req_wait_exc(self->ev, req)) {
 739                 return NULL;
 740         }
 741         status = cli_ftruncate_recv(req);
 742         TALLOC_FREE(req);
 743
 744         if (!NT_STATUS_IS_OK(status)) {
 745                 PyErr_SetNTSTATUS(status);
 746                 return NULL;
 747         }
 748         Py_RETURN_NONE;
 749 }
 750
 751 static PyObject *py_cli_delete_on_close(struct py_cli_state *self,
 752                                         PyObject *args,
 753                                         PyObject *kwds)
 754 {
 755         unsigned fnum, flag;
 756         struct tevent_req *req;
 757         NTSTATUS status;
 758
 759         static const char *kwlist[] = {
 760                 "fnum", "flag", NULL };
 761
 762         if (!ParseTupleAndKeywords(
 763                     args, kwds, "II", kwlist, &fnum, &flag)) {
 764                 return NULL;
 765         }
 766
 767         req = cli_nt_delete_on_close_send(NULL, self->ev, self->cli, fnum,
 768                                           flag);
 769         if (!py_tevent_req_wait_exc(self->ev, req)) {
 770                 return NULL;
 771         }
 772         status = cli_nt_delete_on_close_recv(req);
 773         TALLOC_FREE(req);
 774
 775         if (!NT_STATUS_IS_OK(status)) {
 776                 PyErr_SetNTSTATUS(status);
 777                 return NULL;
 778         }
 779         Py_RETURN_NONE;
 780 }
 781
 782 static PyObject *py_cli_list(struct py_cli_state *self,
 783                              PyObject *args,
 784                              PyObject *kwds)
 785 {
 786         char *mask;
 787         unsigned attribute =
 788                 FILE_ATTRIBUTE_DIRECTORY |
 789                 FILE_ATTRIBUTE_SYSTEM |
 790                 FILE_ATTRIBUTE_HIDDEN;
 791         unsigned info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 792         struct tevent_req *req;
 793         NTSTATUS status;
 794         struct file_info *finfos;
 795         size_t i, num_finfos;
 796         PyObject *result;
 797
 798         const char *kwlist[] = {
 799                 "mask", "attribute", "info_level", NULL
 800         };
 801
 802         if (!ParseTupleAndKeywords(
 803                     args, kwds, "s|II", kwlist,
 804                     &mask, &attribute, &info_level)) {
 805                 return NULL;
 806         }
 807
 808         req = cli_list_send(NULL, self->ev, self->cli, mask, attribute,
 809                             info_level);
 810         if (!py_tevent_req_wait_exc(self->ev, req)) {
 811                 return NULL;
 812         }
 813         status = cli_list_recv(req, NULL, &finfos, &num_finfos);
 814         TALLOC_FREE(req);
 815
 816         if (!NT_STATUS_IS_OK(status)) {
 817                 PyErr_SetNTSTATUS(status);
 818                 return NULL;
 819         }
 820
 821         result = Py_BuildValue("[]");
 822         if (result == NULL) {
 823                 return NULL;
 824         }
 825
 826         for (i=0; i<num_finfos; i++) {
 827                 struct file_info *finfo = &finfos[i];
 828                 PyObject *file;
 829                 int ret;
 830
 831                 file = Py_BuildValue(
 832                         "{s:s,s:i}",
 833                         "name", finfo->name,
 834                         "mode", (int)finfo->mode);
 835                 if (file == NULL) {
 836                         Py_XDECREF(result);
 837                         return NULL;
 838                 }
 839
 840                 ret = PyList_Append(result, file);
 841                 if (ret == -1) {
 842                         Py_XDECREF(result);
 843                         return NULL;
 844                 }
 845         }
 846
 847         return result;
 848 }
 849
 850 static PyMethodDef py_cli_state_methods[] = {
 851         { "create", (PyCFunction)py_cli_create, METH_VARARGS|METH_KEYWORDS,
 852           "Open a file" },
 853         { "close", (PyCFunction)py_cli_close, METH_VARARGS,
 854           "Close a file handle" },
 855         { "write", (PyCFunction)py_cli_write, METH_VARARGS|METH_KEYWORDS,
 856           "Write to a file handle" },
 857         { "read", (PyCFunction)py_cli_read, METH_VARARGS|METH_KEYWORDS,
 858           "Read from a file handle" },
 859         { "truncate", (PyCFunction)py_cli_ftruncate,
 860           METH_VARARGS|METH_KEYWORDS,
 861           "Truncate a file" },
 862         { "delete_on_close", (PyCFunction)py_cli_delete_on_close,
 863           METH_VARARGS|METH_KEYWORDS,
 864           "Set/Reset the delete on close flag" },
 865         { "readdir", (PyCFunction)py_cli_list,
 866           METH_VARARGS|METH_KEYWORDS,
 867           "List a directory" },
 868         { "get_oplock_break", (PyCFunction)py_cli_get_oplock_break,
 869           METH_VARARGS, "Wait for an oplock break" },
 870         { NULL, NULL, 0, NULL }
 871 };
 872
 873 static PyTypeObject py_cli_state_type = {
 874         PyObject_HEAD_INIT(NULL)
 875         .tp_name = "libsmb_samba_internal.Conn",
 876         .tp_basicsize = sizeof(struct py_cli_state),
 877         .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
 878         .tp_doc = "libsmb connection",
 879         .tp_new = py_cli_state_new,
 880         .tp_init = (initproc)py_cli_state_init,
 881         .tp_dealloc = (destructor)py_cli_state_dealloc,
 882         .tp_methods = py_cli_state_methods,
 883 };
 884
 885 static PyMethodDef py_libsmb_methods[] = {
 886         { NULL },
 887 };
 888
 889 void initlibsmb_samba_internal(void);
 890 void initlibsmb_samba_internal(void)
 891 {
 892         PyObject *m;
 893
 894         talloc_stackframe();
 895
 896         m = Py_InitModule3("libsmb_samba_internal", py_libsmb_methods,
 897                            "libsmb wrapper");
 898
 899         if (PyType_Ready(&py_cli_state_type) < 0) {
 900                 return;
 901         }
 902         Py_INCREF(&py_cli_state_type);
 903         PyModule_AddObject(m, "Conn", (PyObject *)&py_cli_state_type);
 904 }