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 "python/py3compat.h"
  24 #include "libsmb/libsmb.h"
  25 #include "libcli/security/security.h"
  26 #include "system/select.h"
  27 #include "source4/libcli/util/pyerrors.h"
  28 #include "auth/credentials/pycredentials.h"
  29 #include "trans2.h"
  30
  31 static PyTypeObject *get_pytype(const char *module, const char *type)
  32 {
  33         PyObject *mod;
  34         PyTypeObject *result;
  35
  36         mod = PyImport_ImportModule(module);
  37         if (mod == NULL) {
  38                 PyErr_Format(PyExc_RuntimeError,
  39                              "Unable to import %s to check type %s",
  40                              module, type);
  41                 return NULL;
  42         }
  43         result = (PyTypeObject *)PyObject_GetAttrString(mod, type);
  44         Py_DECREF(mod);
  45         if (result == NULL) {
  46                 PyErr_Format(PyExc_RuntimeError,
  47                              "Unable to find type %s in module %s",
  48                              module, type);
  49                 return NULL;
  50         }
  51         return result;
  52 }
  53
  54 /*
  55  * We're using "const char * const *" for keywords,
  56  * PyArg_ParseTupleAndKeywords expects a "char **". Confine the
  57  * inevitable warnings to just one place.
  58  */
  59 static int ParseTupleAndKeywords(PyObject *args, PyObject *kw,
  60                                  const char *format, const char * const *keywords,
  61                                  ...)
  62 {
  63         char **_keywords = discard_const_p(char *, keywords);
  64         va_list a;
  65         int ret;
  66         va_start(a, keywords);
  67         ret = PyArg_VaParseTupleAndKeywords(args, kw, format,
  68                                             _keywords, a);
  69         va_end(a);
  70         return ret;
  71 }
  72
  73 struct py_cli_thread;
  74
  75 struct py_cli_oplock_break {
  76         uint16_t fnum;
  77         uint8_t level;
  78 };
  79
  80 struct py_cli_state {
  81         PyObject_HEAD
  82         struct cli_state *cli;
  83         struct tevent_context *ev;
  84         int (*req_wait_fn)(struct tevent_context *ev,
  85                            struct tevent_req *req);
  86         struct py_cli_thread *thread_state;
  87
  88         struct tevent_req *oplock_waiter;
  89         struct py_cli_oplock_break *oplock_breaks;
  90         struct py_tevent_cond *oplock_cond;
  91 };
  92
  93 #ifdef HAVE_PTHREAD
  94
  95 #include <pthread.h>
  96
  97 struct py_cli_thread {
  98
  99         /*
 100          * Pipe to make the poll thread wake up in our destructor, so
 101          * that we can exit and join the thread.
 102          */
 103         int shutdown_pipe[2];
 104         struct tevent_fd *shutdown_fde;
 105         bool do_shutdown;
 106         pthread_t id;
 107
 108         /*
 109          * Thread state to release the GIL during the poll(2) syscall
 110          */
 111         PyThreadState *py_threadstate;
 112 };
 113
 114 static void *py_cli_state_poll_thread(void *private_data)
 115 {
 116         struct py_cli_state *self = (struct py_cli_state *)private_data;
 117         struct py_cli_thread *t = self->thread_state;
 118         PyGILState_STATE gstate;
 119
 120         gstate = PyGILState_Ensure();
 121
 122         while (!t->do_shutdown) {
 123                 int ret;
 124                 ret = tevent_loop_once(self->ev);
 125                 assert(ret == 0);
 126         }
 127         PyGILState_Release(gstate);
 128         return NULL;
 129 }
 130
 131 static void py_cli_state_trace_callback(enum tevent_trace_point point,
 132                                         void *private_data)
 133 {
 134         struct py_cli_state *self = (struct py_cli_state *)private_data;
 135         struct py_cli_thread *t = self->thread_state;
 136
 137         switch(point) {
 138         case TEVENT_TRACE_BEFORE_WAIT:
 139                 assert(t->py_threadstate == NULL);
 140                 t->py_threadstate = PyEval_SaveThread();
 141                 break;
 142         case TEVENT_TRACE_AFTER_WAIT:
 143                 assert(t->py_threadstate != NULL);
 144                 PyEval_RestoreThread(t->py_threadstate);
 145                 t->py_threadstate = NULL;
 146                 break;
 147         default:
 148                 break;
 149         }
 150 }
 151
 152 static void py_cli_state_shutdown_handler(struct tevent_context *ev,
 153                                           struct tevent_fd *fde,
 154                                           uint16_t flags,
 155                                           void *private_data)
 156 {
 157         struct py_cli_state *self = (struct py_cli_state *)private_data;
 158         struct py_cli_thread *t = self->thread_state;
 159
 160         if ((flags & TEVENT_FD_READ) == 0) {
 161                 return;
 162         }
 163         TALLOC_FREE(t->shutdown_fde);
 164         t->do_shutdown = true;
 165 }
 166
 167 static int py_cli_thread_destructor(struct py_cli_thread *t)
 168 {
 169         char c = 0;
 170         ssize_t written;
 171         int ret;
 172
 173         do {
 174                 /*
 175                  * This will wake the poll thread from the poll(2)
 176                  */
 177                 written = write(t->shutdown_pipe[1], &c, 1);
 178         } while ((written == -1) && (errno == EINTR));
 179
 180         /*
 181          * Allow the poll thread to do its own cleanup under the GIL
 182          */
 183         Py_BEGIN_ALLOW_THREADS
 184         ret = pthread_join(t->id, NULL);
 185         Py_END_ALLOW_THREADS
 186         assert(ret == 0);
 187
 188         if (t->shutdown_pipe[0] != -1) {
 189                 close(t->shutdown_pipe[0]);
 190                 t->shutdown_pipe[0] = -1;
 191         }
 192         if (t->shutdown_pipe[1] != -1) {
 193                 close(t->shutdown_pipe[1]);
 194                 t->shutdown_pipe[1] = -1;
 195         }
 196         return 0;
 197 }
 198
 199 static int py_tevent_cond_req_wait(struct tevent_context *ev,
 200                                    struct tevent_req *req);
 201
 202 static bool py_cli_state_setup_mt_ev(struct py_cli_state *self)
 203 {
 204         struct py_cli_thread *t = NULL;
 205         int ret;
 206
 207         self->ev = tevent_context_init_byname(NULL, "poll_mt");
 208         if (self->ev == NULL) {
 209                 goto fail;
 210         }
 211         samba_tevent_set_debug(self->ev, "pylibsmb_tevent_mt");
 212         tevent_set_trace_callback(self->ev, py_cli_state_trace_callback, self);
 213
 214         self->req_wait_fn = py_tevent_cond_req_wait;
 215
 216         self->thread_state = talloc_zero(NULL, struct py_cli_thread);
 217         if (self->thread_state == NULL) {
 218                 goto fail;
 219         }
 220         t = self->thread_state;
 221
 222         ret = pipe(t->shutdown_pipe);
 223         if (ret == -1) {
 224                 goto fail;
 225         }
 226         t->shutdown_fde = tevent_add_fd(
 227                 self->ev, self->ev, t->shutdown_pipe[0], TEVENT_FD_READ,
 228                 py_cli_state_shutdown_handler, self);
 229         if (t->shutdown_fde == NULL) {
 230                 goto fail;
 231         }
 232
 233         PyEval_InitThreads();
 234
 235         ret = pthread_create(&t->id, NULL, py_cli_state_poll_thread, self);
 236         if (ret != 0) {
 237                 goto fail;
 238         }
 239         talloc_set_destructor(self->thread_state, py_cli_thread_destructor);
 240         return true;
 241
 242 fail:
 243         if (t != NULL) {
 244                 TALLOC_FREE(t->shutdown_fde);
 245
 246                 if (t->shutdown_pipe[0] != -1) {
 247                         close(t->shutdown_pipe[0]);
 248                         t->shutdown_pipe[0] = -1;
 249                 }
 250                 if (t->shutdown_pipe[1] != -1) {
 251                         close(t->shutdown_pipe[1]);
 252                         t->shutdown_pipe[1] = -1;
 253                 }
 254         }
 255
 256         TALLOC_FREE(self->thread_state);
 257         TALLOC_FREE(self->ev);
 258         return false;
 259 }
 260
 261 struct py_tevent_cond {
 262         pthread_mutex_t mutex;
 263         pthread_cond_t cond;
 264         bool is_done;
 265 };
 266
 267 static void py_tevent_signalme(struct tevent_req *req);
 268
 269 static int py_tevent_cond_wait(struct py_tevent_cond *cond)
 270 {
 271         int ret, result;
 272
 273         result = pthread_mutex_init(&cond->mutex, NULL);
 274         if (result != 0) {
 275                 goto fail;
 276         }
 277         result = pthread_cond_init(&cond->cond, NULL);
 278         if (result != 0) {
 279                 goto fail_mutex;
 280         }
 281
 282         result = pthread_mutex_lock(&cond->mutex);
 283         if (result != 0) {
 284                 goto fail_cond;
 285         }
 286
 287         cond->is_done = false;
 288
 289         while (!cond->is_done) {
 290
 291                 Py_BEGIN_ALLOW_THREADS
 292                 result = pthread_cond_wait(&cond->cond, &cond->mutex);
 293                 Py_END_ALLOW_THREADS
 294
 295                 if (result != 0) {
 296                         goto fail_unlock;
 297                 }
 298         }
 299
 300 fail_unlock:
 301         ret = pthread_mutex_unlock(&cond->mutex);
 302         assert(ret == 0);
 303 fail_cond:
 304         ret = pthread_cond_destroy(&cond->cond);
 305         assert(ret == 0);
 306 fail_mutex:
 307         ret = pthread_mutex_destroy(&cond->mutex);
 308         assert(ret == 0);
 309 fail:
 310         return result;
 311 }
 312
 313 static int py_tevent_cond_req_wait(struct tevent_context *ev,
 314                                    struct tevent_req *req)
 315 {
 316         struct py_tevent_cond cond;
 317         tevent_req_set_callback(req, py_tevent_signalme, &cond);
 318         return py_tevent_cond_wait(&cond);
 319 }
 320
 321 static void py_tevent_cond_signal(struct py_tevent_cond *cond)
 322 {
 323         int ret;
 324
 325         ret = pthread_mutex_lock(&cond->mutex);
 326         assert(ret == 0);
 327
 328         cond->is_done = true;
 329
 330         ret = pthread_cond_signal(&cond->cond);
 331         assert(ret == 0);
 332         ret = pthread_mutex_unlock(&cond->mutex);
 333         assert(ret == 0);
 334 }
 335
 336 static void py_tevent_signalme(struct tevent_req *req)
 337 {
 338         struct py_tevent_cond *cond = (struct py_tevent_cond *)
 339                 tevent_req_callback_data_void(req);
 340
 341         py_tevent_cond_signal(cond);
 342 }
 343
 344 #endif
 345
 346 static int py_tevent_req_wait(struct tevent_context *ev,
 347                               struct tevent_req *req);
 348
 349 static bool py_cli_state_setup_ev(struct py_cli_state *self)
 350 {
 351         self->ev = tevent_context_init(NULL);
 352         if (self->ev == NULL) {
 353                 return false;
 354         }
 355
 356         samba_tevent_set_debug(self->ev, "pylibsmb_tevent");
 357
 358         self->req_wait_fn = py_tevent_req_wait;
 359
 360         return true;
 361 }
 362
 363 static int py_tevent_req_wait(struct tevent_context *ev,
 364                               struct tevent_req *req)
 365 {
 366         while (tevent_req_is_in_progress(req)) {
 367                 int ret;
 368
 369                 ret = tevent_loop_once(ev);
 370                 if (ret != 0) {
 371                         return ret;
 372                 }
 373         }
 374         return 0;
 375 }
 376
 377 static bool py_tevent_req_wait_exc(struct py_cli_state *self,
 378                                    struct tevent_req *req)
 379 {
 380         int ret;
 381
 382         if (req == NULL) {
 383                 PyErr_NoMemory();
 384                 return false;
 385         }
 386         ret = self->req_wait_fn(self->ev, req);
 387         if (ret != 0) {
 388                 TALLOC_FREE(req);
 389                 errno = ret;
 390                 PyErr_SetFromErrno(PyExc_RuntimeError);
 391                 return false;
 392         }
 393         return true;
 394 }
 395
 396 static PyObject *py_cli_state_new(PyTypeObject *type, PyObject *args,
 397                                   PyObject *kwds)
 398 {
 399         struct py_cli_state *self;
 400
 401         self = (struct py_cli_state *)type->tp_alloc(type, 0);
 402         if (self == NULL) {
 403                 return NULL;
 404         }
 405         self->cli = NULL;
 406         self->ev = NULL;
 407         self->thread_state = NULL;
 408         self->oplock_waiter = NULL;
 409         self->oplock_cond = NULL;
 410         self->oplock_breaks = NULL;
 411         return (PyObject *)self;
 412 }
 413
 414 static void py_cli_got_oplock_break(struct tevent_req *req);
 415
 416 static int py_cli_state_init(struct py_cli_state *self, PyObject *args,
 417                              PyObject *kwds)
 418 {
 419         NTSTATUS status;
 420         char *host, *share;
 421         PyObject *creds = NULL;
 422         struct cli_credentials *cli_creds;
 423         PyObject *py_multi_threaded = Py_False;
 424         bool multi_threaded = false;
 425         struct tevent_req *req;
 426         bool ret;
 427         /*
 428          * For now we only support SMB1,
 429          * as most of the cli_*_send() function
 430          * don't support SMB2, it's only plugged
 431          * into the sync wrapper functions currently.
 432          */
 433         int flags = CLI_FULL_CONNECTION_FORCE_SMB1;
 434
 435         static const char *kwlist[] = {
 436                 "host", "share", "credentials", "multi_threaded", NULL
 437         };
 438
 439         PyTypeObject *py_type_Credentials = get_pytype(
 440                 "samba.credentials", "Credentials");
 441         if (py_type_Credentials == NULL) {
 442                 return -1;
 443         }
 444
 445         ret = ParseTupleAndKeywords(
 446                 args, kwds, "ss|O!O", kwlist,
 447                 &host, &share,
 448                 py_type_Credentials, &creds,
 449                 &py_multi_threaded);
 450
 451         Py_DECREF(py_type_Credentials);
 452
 453         if (!ret) {
 454                 return -1;
 455         }
 456
 457         multi_threaded = PyObject_IsTrue(py_multi_threaded);
 458
 459         if (multi_threaded) {
 460 #ifdef HAVE_PTHREAD
 461                 ret = py_cli_state_setup_mt_ev(self);
 462                 if (!ret) {
 463                         return -1;
 464                 }
 465 #else
 466                 PyErr_SetString(PyExc_RuntimeError,
 467                                 "No PTHREAD support available");
 468                 return -1;
 469 #endif
 470         } else {
 471                 ret = py_cli_state_setup_ev(self);
 472                 if (!ret) {
 473                         return -1;
 474                 }
 475         }
 476
 477         if (creds == NULL) {
 478                 cli_creds = cli_credentials_init_anon(NULL);
 479         } else {
 480                 cli_creds = PyCredentials_AsCliCredentials(creds);
 481         }
 482
 483         req = cli_full_connection_creds_send(
 484                 NULL, self->ev, "myname", host, NULL, 0, share, "?????",
 485                 cli_creds, flags, SMB_SIGNING_DEFAULT);
 486         if (!py_tevent_req_wait_exc(self, req)) {
 487                 return -1;
 488         }
 489         status = cli_full_connection_creds_recv(req, &self->cli);
 490         TALLOC_FREE(req);
 491
 492         if (!NT_STATUS_IS_OK(status)) {
 493                 PyErr_SetNTSTATUS(status);
 494                 return -1;
 495         }
 496
 497         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 498                 self->ev, self->ev, self->cli);
 499         if (self->oplock_waiter == NULL) {
 500                 PyErr_NoMemory();
 501                 return -1;
 502         }
 503         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 504                                 self);
 505         return 0;
 506 }
 507
 508 static void py_cli_got_oplock_break(struct tevent_req *req)
 509 {
 510         struct py_cli_state *self = (struct py_cli_state *)
 511                 tevent_req_callback_data_void(req);
 512         struct py_cli_oplock_break b;
 513         struct py_cli_oplock_break *tmp;
 514         size_t num_breaks;
 515         NTSTATUS status;
 516
 517         status = cli_smb_oplock_break_waiter_recv(req, &b.fnum, &b.level);
 518         TALLOC_FREE(req);
 519         self->oplock_waiter = NULL;
 520
 521         if (!NT_STATUS_IS_OK(status)) {
 522                 return;
 523         }
 524
 525         num_breaks = talloc_array_length(self->oplock_breaks);
 526         tmp = talloc_realloc(self->ev, self->oplock_breaks,
 527                              struct py_cli_oplock_break, num_breaks+1);
 528         if (tmp == NULL) {
 529                 return;
 530         }
 531         self->oplock_breaks = tmp;
 532         self->oplock_breaks[num_breaks] = b;
 533
 534         if (self->oplock_cond != NULL) {
 535                 py_tevent_cond_signal(self->oplock_cond);
 536         }
 537
 538         self->oplock_waiter = cli_smb_oplock_break_waiter_send(
 539                 self->ev, self->ev, self->cli);
 540         if (self->oplock_waiter == NULL) {
 541                 return;
 542         }
 543         tevent_req_set_callback(self->oplock_waiter, py_cli_got_oplock_break,
 544                                 self);
 545 }
 546
 547 static PyObject *py_cli_get_oplock_break(struct py_cli_state *self,
 548                                          PyObject *args)
 549 {
 550         size_t num_oplock_breaks;
 551
 552         if (!PyArg_ParseTuple(args, "")) {
 553                 return NULL;
 554         }
 555
 556         if (self->oplock_cond != NULL) {
 557                 errno = EBUSY;
 558                 PyErr_SetFromErrno(PyExc_RuntimeError);
 559                 return NULL;
 560         }
 561
 562         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 563
 564         if (num_oplock_breaks == 0) {
 565                 struct py_tevent_cond cond;
 566                 int ret;
 567
 568                 self->oplock_cond = &cond;
 569                 ret = py_tevent_cond_wait(&cond);
 570                 self->oplock_cond = NULL;
 571
 572                 if (ret != 0) {
 573                         errno = ret;
 574                         PyErr_SetFromErrno(PyExc_RuntimeError);
 575                         return NULL;
 576                 }
 577         }
 578
 579         num_oplock_breaks = talloc_array_length(self->oplock_breaks);
 580         if (num_oplock_breaks > 0) {
 581                 PyObject *result;
 582
 583                 result = Py_BuildValue(
 584                         "{s:i,s:i}",
 585                         "fnum", self->oplock_breaks[0].fnum,
 586                         "level", self->oplock_breaks[0].level);
 587
 588                 memmove(&self->oplock_breaks[0], &self->oplock_breaks[1],
 589                         sizeof(self->oplock_breaks[0]) *
 590                         (num_oplock_breaks - 1));
 591                 self->oplock_breaks = talloc_realloc(
 592                         NULL, self->oplock_breaks, struct py_cli_oplock_break,
 593                         num_oplock_breaks - 1);
 594
 595                 return result;
 596         }
 597         Py_RETURN_NONE;
 598 }
 599
 600 static void py_cli_state_dealloc(struct py_cli_state *self)
 601 {
 602         TALLOC_FREE(self->thread_state);
 603         TALLOC_FREE(self->oplock_waiter);
 604         TALLOC_FREE(self->ev);
 605
 606         if (self->cli != NULL) {
 607                 cli_shutdown(self->cli);
 608                 self->cli = NULL;
 609         }
 610         Py_TYPE(self)->tp_free((PyObject *)self);
 611 }
 612
 613 static PyObject *py_cli_create(struct py_cli_state *self, PyObject *args,
 614                                PyObject *kwds)
 615 {
 616         char *fname;
 617         unsigned CreateFlags = 0;
 618         unsigned DesiredAccess = FILE_GENERIC_READ;
 619         unsigned FileAttributes = 0;
 620         unsigned ShareAccess = 0;
 621         unsigned CreateDisposition = FILE_OPEN;
 622         unsigned CreateOptions = 0;
 623         unsigned SecurityFlags = 0;
 624         uint16_t fnum;
 625         struct tevent_req *req;
 626         NTSTATUS status;
 627
 628         static const char *kwlist[] = {
 629                 "Name", "CreateFlags", "DesiredAccess", "FileAttributes",
 630                 "ShareAccess", "CreateDisposition", "CreateOptions",
 631                 "SecurityFlags", NULL };
 632
 633         if (!ParseTupleAndKeywords(
 634                     args, kwds, "s|IIIIIII", kwlist,
 635                     &fname, &CreateFlags, &DesiredAccess, &FileAttributes,
 636                     &ShareAccess, &CreateDisposition, &CreateOptions,
 637                     &SecurityFlags)) {
 638                 return NULL;
 639         }
 640
 641         req = cli_ntcreate_send(NULL, self->ev, self->cli, fname, CreateFlags,
 642                                 DesiredAccess, FileAttributes, ShareAccess,
 643                                 CreateDisposition, CreateOptions,
 644                                 SecurityFlags);
 645         if (!py_tevent_req_wait_exc(self, req)) {
 646                 return NULL;
 647         }
 648         status = cli_ntcreate_recv(req, &fnum, NULL);
 649         TALLOC_FREE(req);
 650
 651         if (!NT_STATUS_IS_OK(status)) {
 652                 PyErr_SetNTSTATUS(status);
 653                 return NULL;
 654         }
 655         return Py_BuildValue("I", (unsigned)fnum);
 656 }
 657
 658 static PyObject *py_cli_close(struct py_cli_state *self, PyObject *args)
 659 {
 660         struct tevent_req *req;
 661         int fnum;
 662         NTSTATUS status;
 663
 664         if (!PyArg_ParseTuple(args, "i", &fnum)) {
 665                 return NULL;
 666         }
 667
 668         req = cli_close_send(NULL, self->ev, self->cli, fnum);
 669         if (!py_tevent_req_wait_exc(self, req)) {
 670                 return NULL;
 671         }
 672         status = cli_close_recv(req);
 673         TALLOC_FREE(req);
 674
 675         if (!NT_STATUS_IS_OK(status)) {
 676                 PyErr_SetNTSTATUS(status);
 677                 return NULL;
 678         }
 679         Py_RETURN_NONE;
 680 }
 681
 682 static PyObject *py_cli_write(struct py_cli_state *self, PyObject *args,
 683                               PyObject *kwds)
 684 {
 685         int fnum;
 686         unsigned mode = 0;
 687         char *buf;
 688         Py_ssize_t buflen;
 689         unsigned long long offset;
 690         struct tevent_req *req;
 691         NTSTATUS status;
 692         size_t written;
 693
 694         static const char *kwlist[] = {
 695                 "fnum", "buffer", "offset", "mode", NULL };
 696
 697         if (!ParseTupleAndKeywords(
 698                     args, kwds, "Is#K|I", kwlist,
 699                     &fnum, &buf, &buflen, &offset, &mode)) {
 700                 return NULL;
 701         }
 702
 703         req = cli_write_andx_send(NULL, self->ev, self->cli, fnum, mode,
 704                                   (uint8_t *)buf, offset, buflen);
 705         if (!py_tevent_req_wait_exc(self, req)) {
 706                 return NULL;
 707         }
 708         status = cli_write_andx_recv(req, &written);
 709         TALLOC_FREE(req);
 710
 711         if (!NT_STATUS_IS_OK(status)) {
 712                 PyErr_SetNTSTATUS(status);
 713                 return NULL;
 714         }
 715         return Py_BuildValue("K", (unsigned long long)written);
 716 }
 717
 718 static PyObject *py_cli_read(struct py_cli_state *self, PyObject *args,
 719                              PyObject *kwds)
 720 {
 721         int fnum;
 722         unsigned long long offset;
 723         unsigned size;
 724         struct tevent_req *req;
 725         NTSTATUS status;
 726         uint8_t *buf;
 727         ssize_t buflen;
 728         PyObject *result;
 729
 730         static const char *kwlist[] = {
 731                 "fnum", "offset", "size", NULL };
 732
 733         if (!ParseTupleAndKeywords(
 734                     args, kwds, "IKI", kwlist, &fnum, &offset,
 735                     &size)) {
 736                 return NULL;
 737         }
 738
 739         req = cli_read_andx_send(NULL, self->ev, self->cli, fnum,
 740                                  offset, size);
 741         if (!py_tevent_req_wait_exc(self, req)) {
 742                 return NULL;
 743         }
 744         status = cli_read_andx_recv(req, &buflen, &buf);
 745
 746         if (!NT_STATUS_IS_OK(status)) {
 747                 TALLOC_FREE(req);
 748                 PyErr_SetNTSTATUS(status);
 749                 return NULL;
 750         }
 751         result = Py_BuildValue("s#", (char *)buf, (int)buflen);
 752         TALLOC_FREE(req);
 753         return result;
 754 }
 755
 756 static PyObject *py_cli_ftruncate(struct py_cli_state *self, PyObject *args,
 757                                   PyObject *kwds)
 758 {
 759         int fnum;
 760         unsigned long long size;
 761         struct tevent_req *req;
 762         NTSTATUS status;
 763
 764         static const char *kwlist[] = {
 765                 "fnum", "size", NULL };
 766
 767         if (!ParseTupleAndKeywords(
 768                     args, kwds, "IK", kwlist, &fnum, &size)) {
 769                 return NULL;
 770         }
 771
 772         req = cli_ftruncate_send(NULL, self->ev, self->cli, fnum, size);
 773         if (!py_tevent_req_wait_exc(self, req)) {
 774                 return NULL;
 775         }
 776         status = cli_ftruncate_recv(req);
 777         TALLOC_FREE(req);
 778
 779         if (!NT_STATUS_IS_OK(status)) {
 780                 PyErr_SetNTSTATUS(status);
 781                 return NULL;
 782         }
 783         Py_RETURN_NONE;
 784 }
 785
 786 static PyObject *py_cli_delete_on_close(struct py_cli_state *self,
 787                                         PyObject *args,
 788                                         PyObject *kwds)
 789 {
 790         unsigned fnum, flag;
 791         struct tevent_req *req;
 792         NTSTATUS status;
 793
 794         static const char *kwlist[] = {
 795                 "fnum", "flag", NULL };
 796
 797         if (!ParseTupleAndKeywords(
 798                     args, kwds, "II", kwlist, &fnum, &flag)) {
 799                 return NULL;
 800         }
 801
 802         req = cli_nt_delete_on_close_send(NULL, self->ev, self->cli, fnum,
 803                                           flag);
 804         if (!py_tevent_req_wait_exc(self, req)) {
 805                 return NULL;
 806         }
 807         status = cli_nt_delete_on_close_recv(req);
 808         TALLOC_FREE(req);
 809
 810         if (!NT_STATUS_IS_OK(status)) {
 811                 PyErr_SetNTSTATUS(status);
 812                 return NULL;
 813         }
 814         Py_RETURN_NONE;
 815 }
 816
 817 static PyObject *py_cli_list(struct py_cli_state *self,
 818                              PyObject *args,
 819                              PyObject *kwds)
 820 {
 821         char *mask;
 822         unsigned attribute =
 823                 FILE_ATTRIBUTE_DIRECTORY |
 824                 FILE_ATTRIBUTE_SYSTEM |
 825                 FILE_ATTRIBUTE_HIDDEN;
 826         unsigned info_level = SMB_FIND_FILE_BOTH_DIRECTORY_INFO;
 827         struct tevent_req *req;
 828         NTSTATUS status;
 829         struct file_info *finfos;
 830         size_t i, num_finfos;
 831         PyObject *result;
 832
 833         const char *kwlist[] = {
 834                 "mask", "attribute", "info_level", NULL
 835         };
 836
 837         if (!ParseTupleAndKeywords(
 838                     args, kwds, "s|II", kwlist,
 839                     &mask, &attribute, &info_level)) {
 840                 return NULL;
 841         }
 842
 843         req = cli_list_send(NULL, self->ev, self->cli, mask, attribute,
 844                             info_level);
 845         if (!py_tevent_req_wait_exc(self, req)) {
 846                 return NULL;
 847         }
 848         status = cli_list_recv(req, NULL, &finfos, &num_finfos);
 849         TALLOC_FREE(req);
 850
 851         if (!NT_STATUS_IS_OK(status)) {
 852                 PyErr_SetNTSTATUS(status);
 853                 return NULL;
 854         }
 855
 856         result = Py_BuildValue("[]");
 857         if (result == NULL) {
 858                 return NULL;
 859         }
 860
 861         for (i=0; i<num_finfos; i++) {
 862                 struct file_info *finfo = &finfos[i];
 863                 PyObject *file;
 864                 int ret;
 865
 866                 file = Py_BuildValue(
 867                         "{s:s,s:i}",
 868                         "name", finfo->name,
 869                         "mode", (int)finfo->mode);
 870                 if (file == NULL) {
 871                         Py_XDECREF(result);
 872                         return NULL;
 873                 }
 874
 875                 ret = PyList_Append(result, file);
 876                 if (ret == -1) {
 877                         Py_XDECREF(result);
 878                         return NULL;
 879                 }
 880         }
 881
 882         return result;
 883 }
 884
 885 static PyMethodDef py_cli_state_methods[] = {
 886         { "create", (PyCFunction)py_cli_create, METH_VARARGS|METH_KEYWORDS,
 887           "Open a file" },
 888         { "close", (PyCFunction)py_cli_close, METH_VARARGS,
 889           "Close a file handle" },
 890         { "write", (PyCFunction)py_cli_write, METH_VARARGS|METH_KEYWORDS,
 891           "Write to a file handle" },
 892         { "read", (PyCFunction)py_cli_read, METH_VARARGS|METH_KEYWORDS,
 893           "Read from a file handle" },
 894         { "truncate", (PyCFunction)py_cli_ftruncate,
 895           METH_VARARGS|METH_KEYWORDS,
 896           "Truncate a file" },
 897         { "delete_on_close", (PyCFunction)py_cli_delete_on_close,
 898           METH_VARARGS|METH_KEYWORDS,
 899           "Set/Reset the delete on close flag" },
 900         { "readdir", (PyCFunction)py_cli_list,
 901           METH_VARARGS|METH_KEYWORDS,
 902           "List a directory" },
 903         { "get_oplock_break", (PyCFunction)py_cli_get_oplock_break,
 904           METH_VARARGS, "Wait for an oplock break" },
 905         { NULL, NULL, 0, NULL }
 906 };
 907
 908 static PyTypeObject py_cli_state_type = {
 909         PyVarObject_HEAD_INIT(NULL, 0)
 910         .tp_name = "libsmb_samba_internal.Conn",
 911         .tp_basicsize = sizeof(struct py_cli_state),
 912         .tp_flags = Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE,
 913         .tp_doc = "libsmb connection",
 914         .tp_new = py_cli_state_new,
 915         .tp_init = (initproc)py_cli_state_init,
 916         .tp_dealloc = (destructor)py_cli_state_dealloc,
 917         .tp_methods = py_cli_state_methods,
 918 };
 919
 920 static PyMethodDef py_libsmb_methods[] = {
 921         { NULL },
 922 };
 923
 924 void initlibsmb_samba_internal(void);
 925
 926 static struct PyModuleDef moduledef = {
 927     PyModuleDef_HEAD_INIT,
 928     .m_name = "libsmb_samba_internal",
 929     .m_doc = "libsmb wrapper",
 930     .m_size = -1,
 931     .m_methods = py_libsmb_methods,
 932 };
 933
 934 MODULE_INIT_FUNC(libsmb_samba_internal)
 935 {
 936         PyObject *m = NULL;
 937
 938         talloc_stackframe();
 939
 940         m = PyModule_Create(&moduledef);
 941         if (m == NULL) {
 942                 return m;
 943         }
 944         if (PyType_Ready(&py_cli_state_type) < 0) {
 945                 return NULL;
 946         }
 947         Py_INCREF(&py_cli_state_type);
 948         PyModule_AddObject(m, "Conn", (PyObject *)&py_cli_state_type);
 949         return m;
 950 }