source3/libsmb/cli_np_tstream.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3
   4    Copyright (C) Stefan Metzmacher 2010
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "includes.h"
  21 #include "system/network.h"
  22 #include "libsmb/libsmb.h"
  23 #include "libsmb/smb2cli.h"
  24 #include "../libcli/smb/smbXcli_base.h"
  25 #include "../lib/util/tevent_ntstatus.h"
  26 #include "../lib/tsocket/tsocket.h"
  27 #include "../lib/tsocket/tsocket_internal.h"
  28 #include "cli_np_tstream.h"
  29
  30 static const struct tstream_context_ops tstream_cli_np_ops;
  31
  32 /*
  33  * Windows uses 4280 (the max xmit/recv size negotiated on DCERPC).
  34  * This is fits into the max_xmit negotiated at the SMB layer.
  35  *
  36  * On the sending side they may use SMBtranss if the request does not
  37  * fit into a single SMBtrans call.
  38  *
  39  * Windows uses 1024 as max data size of a SMBtrans request and then
  40  * possibly reads the rest of the DCERPC fragment (up to 3256 bytes)
  41  * via a SMBreadX.
  42  *
  43  * For now we just ask for the full 4280 bytes (max data size) in the SMBtrans
  44  * request to get the whole fragment at once (like samba 3.5.x and below did.
  45  *
  46  * It is important that we use do SMBwriteX with the size of a full fragment,
  47  * otherwise we may get NT_STATUS_PIPE_BUSY on the SMBtrans request
  48  * from NT4 servers. (See bug #8195)
  49  */
  50 #define TSTREAM_CLI_NP_MAX_BUF_SIZE 4280
  51
  52 struct tstream_cli_np {
  53         struct cli_state *cli;
  54         const char *npipe;
  55         bool is_smb1;
  56         uint16_t fnum;
  57         uint64_t fid_persistent;
  58         uint64_t fid_volatile;
  59         unsigned int default_timeout;
  60
  61         struct {
  62                 bool active;
  63                 struct tevent_req *read_req;
  64                 struct tevent_req *write_req;
  65                 uint16_t setup[2];
  66         } trans;
  67
  68         struct {
  69                 off_t ofs;
  70                 size_t left;
  71                 uint8_t *buf;
  72         } read, write;
  73 };
  74
  75 static int tstream_cli_np_destructor(struct tstream_cli_np *cli_nps)
  76 {
  77         NTSTATUS status;
  78
  79         if (!cli_state_is_connected(cli_nps->cli)) {
  80                 return 0;
  81         }
  82
  83         /*
  84          * TODO: do not use a sync call with a destructor!!!
  85          *
  86          * This only happens, if a caller does talloc_free(),
  87          * while the everything was still ok.
  88          *
  89          * If we get an unexpected failure within a normal
  90          * operation, we already do an async cli_close_send()/_recv().
  91          *
  92          * Once we've fixed all callers to call
  93          * tstream_disconnect_send()/_recv(), this will
  94          * never be called.
  95          */
  96         if (cli_nps->is_smb1) {
  97                 status = cli_close(cli_nps->cli, cli_nps->fnum);
  98         } else {
  99                 status = smb2cli_close(cli_nps->cli->conn,
 100                                        cli_nps->cli->timeout,
 101                                        cli_nps->cli->smb2.session,
 102                                        cli_nps->cli->smb2.tcon,
 103                                        0, /* flags */
 104                                        cli_nps->fid_persistent,
 105                                        cli_nps->fid_volatile);
 106         }
 107         if (!NT_STATUS_IS_OK(status)) {
 108                 DEBUG(1, ("tstream_cli_np_destructor: cli_close "
 109                           "failed on pipe %s. Error was %s\n",
 110                           cli_nps->npipe, nt_errstr(status)));
 111         }
 112         /*
 113          * We can't do much on failure
 114          */
 115         return 0;
 116 }
 117
 118 struct tstream_cli_np_open_state {
 119         struct cli_state *cli;
 120         bool is_smb1;
 121         uint16_t fnum;
 122         uint64_t fid_persistent;
 123         uint64_t fid_volatile;
 124         const char *npipe;
 125 };
 126
 127 static void tstream_cli_np_open_done(struct tevent_req *subreq);
 128
 129 struct tevent_req *tstream_cli_np_open_send(TALLOC_CTX *mem_ctx,
 130                                             struct tevent_context *ev,
 131                                             struct cli_state *cli,
 132                                             const char *npipe)
 133 {
 134         struct tevent_req *req;
 135         struct tstream_cli_np_open_state *state;
 136         struct tevent_req *subreq;
 137
 138         req = tevent_req_create(mem_ctx, &state,
 139                                 struct tstream_cli_np_open_state);
 140         if (!req) {
 141                 return NULL;
 142         }
 143         state->cli = cli;
 144
 145         state->npipe = talloc_strdup(state, npipe);
 146         if (tevent_req_nomem(state->npipe, req)) {
 147                 return tevent_req_post(req, ev);
 148         }
 149
 150         if (smbXcli_conn_protocol(cli->conn) < PROTOCOL_SMB2_02) {
 151                 state->is_smb1 = true;
 152         }
 153
 154         if (state->is_smb1) {
 155                 const char *smb1_npipe;
 156
 157                 /*
 158                  * Windows and newer Samba versions allow
 159                  * the pipe name without leading backslash,
 160                  * but we should better behave like windows clients
 161                  */
 162                 smb1_npipe = talloc_asprintf(state, "\\%s", state->npipe);
 163                 if (tevent_req_nomem(smb1_npipe, req)) {
 164                         return tevent_req_post(req, ev);
 165                 }
 166
 167                 subreq = cli_ntcreate_send(state, ev, cli,
 168                                            smb1_npipe,
 169                                            0,
 170                                            DESIRED_ACCESS_PIPE,
 171                                            0,
 172                                            FILE_SHARE_READ|FILE_SHARE_WRITE,
 173                                            FILE_OPEN,
 174                                            0,
 175                                            0);
 176         } else {
 177                 subreq = smb2cli_create_send(state, ev, cli->conn,
 178                                              cli->timeout, cli->smb2.session,
 179                                              cli->smb2.tcon,
 180                                              npipe,
 181                                              SMB2_OPLOCK_LEVEL_NONE,
 182                                              SMB2_IMPERSONATION_IMPERSONATION,
 183                                              DESIRED_ACCESS_PIPE,
 184                                              0, /* file_attributes */
 185                                              FILE_SHARE_READ|FILE_SHARE_WRITE,
 186                                              FILE_OPEN,
 187                                              0, /* create_options */
 188                                              NULL); /* blobs */
 189         }
 190         if (tevent_req_nomem(subreq, req)) {
 191                 return tevent_req_post(req, ev);
 192         }
 193         tevent_req_set_callback(subreq, tstream_cli_np_open_done, req);
 194
 195         return req;
 196 }
 197
 198 static void tstream_cli_np_open_done(struct tevent_req *subreq)
 199 {
 200         struct tevent_req *req =
 201                 tevent_req_callback_data(subreq, struct tevent_req);
 202         struct tstream_cli_np_open_state *state =
 203                 tevent_req_data(req, struct tstream_cli_np_open_state);
 204         NTSTATUS status;
 205
 206         if (state->is_smb1) {
 207                 status = cli_ntcreate_recv(subreq, &state->fnum);
 208         } else {
 209                 status = smb2cli_create_recv(subreq,
 210                                              &state->fid_persistent,
 211                                              &state->fid_volatile,
 212                                              NULL);
 213         }
 214         TALLOC_FREE(subreq);
 215         if (!NT_STATUS_IS_OK(status)) {
 216                 tevent_req_nterror(req, status);
 217                 return;
 218         }
 219
 220         tevent_req_done(req);
 221 }
 222
 223 NTSTATUS _tstream_cli_np_open_recv(struct tevent_req *req,
 224                                    TALLOC_CTX *mem_ctx,
 225                                    struct tstream_context **_stream,
 226                                    const char *location)
 227 {
 228         struct tstream_cli_np_open_state *state =
 229                 tevent_req_data(req, struct tstream_cli_np_open_state);
 230         struct tstream_context *stream;
 231         struct tstream_cli_np *cli_nps;
 232         NTSTATUS status;
 233
 234         if (tevent_req_is_nterror(req, &status)) {
 235                 tevent_req_received(req);
 236                 return status;
 237         }
 238
 239         stream = tstream_context_create(mem_ctx,
 240                                         &tstream_cli_np_ops,
 241                                         &cli_nps,
 242                                         struct tstream_cli_np,
 243                                         location);
 244         if (!stream) {
 245                 tevent_req_received(req);
 246                 return NT_STATUS_NO_MEMORY;
 247         }
 248         ZERO_STRUCTP(cli_nps);
 249
 250         cli_nps->cli = state->cli;
 251         cli_nps->npipe = talloc_move(cli_nps, &state->npipe);
 252         cli_nps->is_smb1 = state->is_smb1;
 253         cli_nps->fnum = state->fnum;
 254         cli_nps->fid_persistent = state->fid_persistent;
 255         cli_nps->fid_volatile = state->fid_volatile;
 256         cli_nps->default_timeout = cli_set_timeout(state->cli, 0);
 257         cli_set_timeout(state->cli, cli_nps->default_timeout);
 258
 259         talloc_set_destructor(cli_nps, tstream_cli_np_destructor);
 260
 261         cli_nps->trans.active = false;
 262         cli_nps->trans.read_req = NULL;
 263         cli_nps->trans.write_req = NULL;
 264         SSVAL(cli_nps->trans.setup+0, 0, TRANSACT_DCERPCCMD);
 265         SSVAL(cli_nps->trans.setup+1, 0, cli_nps->fnum);
 266
 267         *_stream = stream;
 268         tevent_req_received(req);
 269         return NT_STATUS_OK;
 270 }
 271
 272 static ssize_t tstream_cli_np_pending_bytes(struct tstream_context *stream)
 273 {
 274         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 275                                          struct tstream_cli_np);
 276
 277         if (!cli_state_is_connected(cli_nps->cli)) {
 278                 errno = ENOTCONN;
 279                 return -1;
 280         }
 281
 282         return cli_nps->read.left;
 283 }
 284
 285 bool tstream_is_cli_np(struct tstream_context *stream)
 286 {
 287         struct tstream_cli_np *cli_nps =
 288                 talloc_get_type(_tstream_context_data(stream),
 289                 struct tstream_cli_np);
 290
 291         if (!cli_nps) {
 292                 return false;
 293         }
 294
 295         return true;
 296 }
 297
 298 NTSTATUS tstream_cli_np_use_trans(struct tstream_context *stream)
 299 {
 300         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 301                                          struct tstream_cli_np);
 302
 303         if (cli_nps->trans.read_req) {
 304                 return NT_STATUS_PIPE_BUSY;
 305         }
 306
 307         if (cli_nps->trans.write_req) {
 308                 return NT_STATUS_PIPE_BUSY;
 309         }
 310
 311         if (cli_nps->trans.active) {
 312                 return NT_STATUS_PIPE_BUSY;
 313         }
 314
 315         cli_nps->trans.active = true;
 316
 317         return NT_STATUS_OK;
 318 }
 319
 320 unsigned int tstream_cli_np_set_timeout(struct tstream_context *stream,
 321                                         unsigned int timeout)
 322 {
 323         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 324                                          struct tstream_cli_np);
 325
 326         if (!cli_state_is_connected(cli_nps->cli)) {
 327                 return cli_nps->default_timeout;
 328         }
 329
 330         return cli_set_timeout(cli_nps->cli, timeout);
 331 }
 332
 333 struct cli_state *tstream_cli_np_get_cli_state(struct tstream_context *stream)
 334 {
 335         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 336                                          struct tstream_cli_np);
 337
 338         return cli_nps->cli;
 339 }
 340
 341 struct tstream_cli_np_writev_state {
 342         struct tstream_context *stream;
 343         struct tevent_context *ev;
 344
 345         struct iovec *vector;
 346         size_t count;
 347
 348         int ret;
 349
 350         struct {
 351                 int val;
 352                 const char *location;
 353         } error;
 354 };
 355
 356 static int tstream_cli_np_writev_state_destructor(struct tstream_cli_np_writev_state *state)
 357 {
 358         struct tstream_cli_np *cli_nps =
 359                 tstream_context_data(state->stream,
 360                 struct tstream_cli_np);
 361
 362         cli_nps->trans.write_req = NULL;
 363
 364         return 0;
 365 }
 366
 367 static void tstream_cli_np_writev_write_next(struct tevent_req *req);
 368
 369 static struct tevent_req *tstream_cli_np_writev_send(TALLOC_CTX *mem_ctx,
 370                                         struct tevent_context *ev,
 371                                         struct tstream_context *stream,
 372                                         const struct iovec *vector,
 373                                         size_t count)
 374 {
 375         struct tevent_req *req;
 376         struct tstream_cli_np_writev_state *state;
 377         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
 378                                          struct tstream_cli_np);
 379
 380         req = tevent_req_create(mem_ctx, &state,
 381                                 struct tstream_cli_np_writev_state);
 382         if (!req) {
 383                 return NULL;
 384         }
 385         state->stream = stream;
 386         state->ev = ev;
 387         state->ret = 0;
 388
 389         talloc_set_destructor(state, tstream_cli_np_writev_state_destructor);
 390
 391         if (!cli_state_is_connected(cli_nps->cli)) {
 392                 tevent_req_error(req, ENOTCONN);
 393                 return tevent_req_post(req, ev);
 394         }
 395
 396         /*
 397          * we make a copy of the vector so we can change the structure
 398          */
 399         state->vector = talloc_array(state, struct iovec, count);
 400         if (tevent_req_nomem(state->vector, req)) {
 401                 return tevent_req_post(req, ev);
 402         }
 403         memcpy(state->vector, vector, sizeof(struct iovec) * count);
 404         state->count = count;
 405
 406         tstream_cli_np_writev_write_next(req);
 407         if (!tevent_req_is_in_progress(req)) {
 408                 return tevent_req_post(req, ev);
 409         }
 410
 411         return req;
 412 }
 413
 414 static void tstream_cli_np_readv_trans_start(struct tevent_req *req);
 415 static void tstream_cli_np_writev_write_done(struct tevent_req *subreq);
 416
 417 static void tstream_cli_np_writev_write_next(struct tevent_req *req)
 418 {
 419         struct tstream_cli_np_writev_state *state =
 420                 tevent_req_data(req,
 421                 struct tstream_cli_np_writev_state);
 422         struct tstream_cli_np *cli_nps =
 423                 tstream_context_data(state->stream,
 424                 struct tstream_cli_np);
 425         struct tevent_req *subreq;
 426         size_t i;
 427         size_t left = 0;
 428
 429         for (i=0; i < state->count; i++) {
 430                 left += state->vector[i].iov_len;
 431         }
 432
 433         if (left == 0) {
 434                 TALLOC_FREE(cli_nps->write.buf);
 435                 tevent_req_done(req);
 436                 return;
 437         }
 438
 439         cli_nps->write.ofs = 0;
 440         cli_nps->write.left = MIN(left, TSTREAM_CLI_NP_MAX_BUF_SIZE);
 441         cli_nps->write.buf = talloc_realloc(cli_nps, cli_nps->write.buf,
 442                                             uint8_t, cli_nps->write.left);
 443         if (tevent_req_nomem(cli_nps->write.buf, req)) {
 444                 return;
 445         }
 446
 447         /*
 448          * copy the pending buffer first
 449          */
 450         while (cli_nps->write.left > 0 && state->count > 0) {
 451                 uint8_t *base = (uint8_t *)state->vector[0].iov_base;
 452                 size_t len = MIN(cli_nps->write.left, state->vector[0].iov_len);
 453
 454                 memcpy(cli_nps->write.buf + cli_nps->write.ofs, base, len);
 455
 456                 base += len;
 457                 state->vector[0].iov_base = base;
 458                 state->vector[0].iov_len -= len;
 459
 460                 cli_nps->write.ofs += len;
 461                 cli_nps->write.left -= len;
 462
 463                 if (state->vector[0].iov_len == 0) {
 464                         state->vector += 1;
 465                         state->count -= 1;
 466                 }
 467
 468                 state->ret += len;
 469         }
 470
 471         if (cli_nps->trans.active && state->count == 0) {
 472                 cli_nps->trans.active = false;
 473                 cli_nps->trans.write_req = req;
 474                 return;
 475         }
 476
 477         if (cli_nps->trans.read_req && state->count == 0) {
 478                 cli_nps->trans.write_req = req;
 479                 tstream_cli_np_readv_trans_start(cli_nps->trans.read_req);
 480                 return;
 481         }
 482
 483         if (cli_nps->is_smb1) {
 484                 subreq = cli_write_andx_send(state, state->ev, cli_nps->cli,
 485                                              cli_nps->fnum,
 486                                              8, /* 8 means message mode. */
 487                                              cli_nps->write.buf,
 488                                              0, /* offset */
 489                                              cli_nps->write.ofs); /* size */
 490         } else {
 491                 subreq = smb2cli_write_send(state, state->ev,
 492                                             cli_nps->cli->conn,
 493                                             cli_nps->cli->timeout,
 494                                             cli_nps->cli->smb2.session,
 495                                             cli_nps->cli->smb2.tcon,
 496                                             cli_nps->write.ofs, /* length */
 497                                             0, /* offset */
 498                                             cli_nps->fid_persistent,
 499                                             cli_nps->fid_volatile,
 500                                             0, /* remaining_bytes */
 501                                             0, /* flags */
 502                                             cli_nps->write.buf);
 503         }
 504         if (tevent_req_nomem(subreq, req)) {
 505                 return;
 506         }
 507         tevent_req_set_callback(subreq,
 508                                 tstream_cli_np_writev_write_done,
 509                                 req);
 510 }
 511
 512 static void tstream_cli_np_writev_disconnect_now(struct tevent_req *req,
 513                                                  int error,
 514                                                  const char *location);
 515
 516 static void tstream_cli_np_writev_write_done(struct tevent_req *subreq)
 517 {
 518         struct tevent_req *req =
 519                 tevent_req_callback_data(subreq, struct tevent_req);
 520         struct tstream_cli_np_writev_state *state =
 521                 tevent_req_data(req, struct tstream_cli_np_writev_state);
 522         struct tstream_cli_np *cli_nps =
 523                 tstream_context_data(state->stream,
 524                 struct tstream_cli_np);
 525         size_t written;
 526         NTSTATUS status;
 527
 528         if (cli_nps->is_smb1) {
 529                 status = cli_write_andx_recv(subreq, &written);
 530         } else {
 531                 uint32_t smb2_written;
 532                 status = smb2cli_write_recv(subreq, &smb2_written);
 533                 if (NT_STATUS_IS_OK(status)) {
 534                         written = smb2_written;
 535                 }
 536         }
 537         TALLOC_FREE(subreq);
 538         if (!NT_STATUS_IS_OK(status)) {
 539                 tstream_cli_np_writev_disconnect_now(req, EIO, __location__);
 540                 return;
 541         }
 542
 543         if (written != cli_nps->write.ofs) {
 544                 tstream_cli_np_writev_disconnect_now(req, EIO, __location__);
 545                 return;
 546         }
 547
 548         tstream_cli_np_writev_write_next(req);
 549 }
 550
 551 static void tstream_cli_np_writev_disconnect_done(struct tevent_req *subreq);
 552
 553 static void tstream_cli_np_writev_disconnect_now(struct tevent_req *req,
 554                                                  int error,
 555                                                  const char *location)
 556 {
 557         struct tstream_cli_np_writev_state *state =
 558                 tevent_req_data(req,
 559                 struct tstream_cli_np_writev_state);
 560         struct tstream_cli_np *cli_nps =
 561                 tstream_context_data(state->stream,
 562                 struct tstream_cli_np);
 563         struct tevent_req *subreq;
 564
 565         state->error.val = error;
 566         state->error.location = location;
 567
 568         if (!cli_state_is_connected(cli_nps->cli)) {
 569                 /* return the original error */
 570                 _tevent_req_error(req, state->error.val, state->error.location);
 571                 return;
 572         }
 573
 574         if (cli_nps->is_smb1) {
 575                 subreq = cli_close_send(state, state->ev, cli_nps->cli,
 576                                         cli_nps->fnum);
 577         } else {
 578                 subreq = smb2cli_close_send(state, state->ev,
 579                                             cli_nps->cli->conn,
 580                                             cli_nps->cli->timeout,
 581                                             cli_nps->cli->smb2.session,
 582                                             cli_nps->cli->smb2.tcon,
 583                                             0, /* flags */
 584                                             cli_nps->fid_persistent,
 585                                             cli_nps->fid_volatile);
 586         }
 587         if (subreq == NULL) {
 588                 /* return the original error */
 589                 _tevent_req_error(req, state->error.val, state->error.location);
 590                 return;
 591         }
 592         tevent_req_set_callback(subreq,
 593                                 tstream_cli_np_writev_disconnect_done,
 594                                 req);
 595 }
 596
 597 static void tstream_cli_np_writev_disconnect_done(struct tevent_req *subreq)
 598 {
 599         struct tevent_req *req =
 600                 tevent_req_callback_data(subreq, struct tevent_req);
 601         struct tstream_cli_np_writev_state *state =
 602                 tevent_req_data(req, struct tstream_cli_np_writev_state);
 603         struct tstream_cli_np *cli_nps =
 604                 tstream_context_data(state->stream, struct tstream_cli_np);
 605
 606         if (cli_nps->is_smb1) {
 607                 cli_close_recv(subreq);
 608         } else {
 609                 smb2cli_close_recv(subreq);
 610         }
 611         TALLOC_FREE(subreq);
 612
 613         cli_nps->cli = NULL;
 614
 615         /* return the original error */
 616         _tevent_req_error(req, state->error.val, state->error.location);
 617 }
 618
 619 static int tstream_cli_np_writev_recv(struct tevent_req *req,
 620                                       int *perrno)
 621 {
 622         struct tstream_cli_np_writev_state *state =
 623                 tevent_req_data(req,
 624                 struct tstream_cli_np_writev_state);
 625         int ret;
 626
 627         ret = tsocket_simple_int_recv(req, perrno);
 628         if (ret == 0) {
 629                 ret = state->ret;
 630         }
 631
 632         tevent_req_received(req);
 633         return ret;
 634 }
 635
 636 struct tstream_cli_np_readv_state {
 637         struct tstream_context *stream;
 638         struct tevent_context *ev;
 639
 640         struct iovec *vector;
 641         size_t count;
 642
 643         int ret;
 644
 645         struct {
 646                 struct tevent_immediate *im;
 647         } trans;
 648
 649         struct {
 650                 int val;
 651                 const char *location;
 652         } error;
 653 };
 654
 655 static int tstream_cli_np_readv_state_destructor(struct tstream_cli_np_readv_state *state)
 656 {
 657         struct tstream_cli_np *cli_nps =
 658                 tstream_context_data(state->stream,
 659                 struct tstream_cli_np);
 660
 661         cli_nps->trans.read_req = NULL;
 662
 663         return 0;
 664 }
 665
 666 static void tstream_cli_np_readv_read_next(struct tevent_req *req);
 667
 668 static struct tevent_req *tstream_cli_np_readv_send(TALLOC_CTX *mem_ctx,
 669                                         struct tevent_context *ev,
 670                                         struct tstream_context *stream,
 671                                         struct iovec *vector,
 672                                         size_t count)
 673 {
 674         struct tevent_req *req;
 675         struct tstream_cli_np_readv_state *state;
 676         struct tstream_cli_np *cli_nps =
 677                 tstream_context_data(stream, struct tstream_cli_np);
 678
 679         req = tevent_req_create(mem_ctx, &state,
 680                                 struct tstream_cli_np_readv_state);
 681         if (!req) {
 682                 return NULL;
 683         }
 684         state->stream = stream;
 685         state->ev = ev;
 686         state->ret = 0;
 687
 688         talloc_set_destructor(state, tstream_cli_np_readv_state_destructor);
 689
 690         if (!cli_state_is_connected(cli_nps->cli)) {
 691                 tevent_req_error(req, ENOTCONN);
 692                 return tevent_req_post(req, ev);
 693         }
 694
 695         /*
 696          * we make a copy of the vector so we can change the structure
 697          */
 698         state->vector = talloc_array(state, struct iovec, count);
 699         if (tevent_req_nomem(state->vector, req)) {
 700                 return tevent_req_post(req, ev);
 701         }
 702         memcpy(state->vector, vector, sizeof(struct iovec) * count);
 703         state->count = count;
 704
 705         tstream_cli_np_readv_read_next(req);
 706         if (!tevent_req_is_in_progress(req)) {
 707                 return tevent_req_post(req, ev);
 708         }
 709
 710         return req;
 711 }
 712
 713 static void tstream_cli_np_readv_read_done(struct tevent_req *subreq);
 714
 715 static void tstream_cli_np_readv_read_next(struct tevent_req *req)
 716 {
 717         struct tstream_cli_np_readv_state *state =
 718                 tevent_req_data(req,
 719                 struct tstream_cli_np_readv_state);
 720         struct tstream_cli_np *cli_nps =
 721                 tstream_context_data(state->stream,
 722                 struct tstream_cli_np);
 723         struct tevent_req *subreq;
 724
 725         /*
 726          * copy the pending buffer first
 727          */
 728         while (cli_nps->read.left > 0 && state->count > 0) {
 729                 uint8_t *base = (uint8_t *)state->vector[0].iov_base;
 730                 size_t len = MIN(cli_nps->read.left, state->vector[0].iov_len);
 731
 732                 memcpy(base, cli_nps->read.buf + cli_nps->read.ofs, len);
 733
 734                 base += len;
 735                 state->vector[0].iov_base = base;
 736                 state->vector[0].iov_len -= len;
 737
 738                 cli_nps->read.ofs += len;
 739                 cli_nps->read.left -= len;
 740
 741                 if (state->vector[0].iov_len == 0) {
 742                         state->vector += 1;
 743                         state->count -= 1;
 744                 }
 745
 746                 state->ret += len;
 747         }
 748
 749         if (cli_nps->read.left == 0) {
 750                 TALLOC_FREE(cli_nps->read.buf);
 751         }
 752
 753         if (state->count == 0) {
 754                 tevent_req_done(req);
 755                 return;
 756         }
 757
 758         if (cli_nps->trans.active) {
 759                 cli_nps->trans.active = false;
 760                 cli_nps->trans.read_req = req;
 761                 return;
 762         }
 763
 764         if (cli_nps->trans.write_req) {
 765                 cli_nps->trans.read_req = req;
 766                 tstream_cli_np_readv_trans_start(req);
 767                 return;
 768         }
 769
 770         if (cli_nps->is_smb1) {
 771                 subreq = cli_read_andx_send(state, state->ev, cli_nps->cli,
 772                                             cli_nps->fnum,
 773                                             0, /* offset */
 774                                             TSTREAM_CLI_NP_MAX_BUF_SIZE);
 775         } else {
 776                 subreq = smb2cli_read_send(state, state->ev,
 777                                            cli_nps->cli->conn,
 778                                            cli_nps->cli->timeout,
 779                                            cli_nps->cli->smb2.session,
 780                                            cli_nps->cli->smb2.tcon,
 781                                            TSTREAM_CLI_NP_MAX_BUF_SIZE, /* length */
 782                                            0, /* offset */
 783                                            cli_nps->fid_persistent,
 784                                            cli_nps->fid_volatile,
 785                                            0, /* minimum_count */
 786                                            0); /* remaining_bytes */
 787         }
 788         if (tevent_req_nomem(subreq, req)) {
 789                 return;
 790         }
 791         tevent_req_set_callback(subreq,
 792                                 tstream_cli_np_readv_read_done,
 793                                 req);
 794 }
 795
 796 static void tstream_cli_np_readv_trans_done(struct tevent_req *subreq);
 797
 798 static void tstream_cli_np_readv_trans_start(struct tevent_req *req)
 799 {
 800         struct tstream_cli_np_readv_state *state =
 801                 tevent_req_data(req,
 802                 struct tstream_cli_np_readv_state);
 803         struct tstream_cli_np *cli_nps =
 804                 tstream_context_data(state->stream,
 805                 struct tstream_cli_np);
 806         struct tevent_req *subreq;
 807
 808         state->trans.im = tevent_create_immediate(state);
 809         if (tevent_req_nomem(state->trans.im, req)) {
 810                 return;
 811         }
 812
 813         if (cli_nps->is_smb1) {
 814                 subreq = cli_trans_send(state, state->ev,
 815                                         cli_nps->cli,
 816                                         SMBtrans,
 817                                         "\\PIPE\\",
 818                                         0, 0, 0,
 819                                         cli_nps->trans.setup, 2,
 820                                         0,
 821                                         NULL, 0, 0,
 822                                         cli_nps->write.buf,
 823                                         cli_nps->write.ofs,
 824                                         TSTREAM_CLI_NP_MAX_BUF_SIZE);
 825         } else {
 826                 DATA_BLOB in_input_buffer = data_blob_null;
 827                 DATA_BLOB in_output_buffer = data_blob_null;
 828
 829                 in_input_buffer = data_blob_const(cli_nps->write.buf,
 830                                                   cli_nps->write.ofs);
 831
 832                 subreq = smb2cli_ioctl_send(state, state->ev,
 833                                             cli_nps->cli->conn,
 834                                             cli_nps->cli->timeout,
 835                                             cli_nps->cli->smb2.session,
 836                                             cli_nps->cli->smb2.tcon,
 837                                             cli_nps->fid_persistent,
 838                                             cli_nps->fid_volatile,
 839                                             FSCTL_NAMED_PIPE_READ_WRITE,
 840                                             0, /* in_max_input_length */
 841                                             &in_input_buffer,
 842                                             /* in_max_output_length */
 843                                             TSTREAM_CLI_NP_MAX_BUF_SIZE,
 844                                             &in_output_buffer,
 845                                             SMB2_IOCTL_FLAG_IS_FSCTL);
 846         }
 847         if (tevent_req_nomem(subreq, req)) {
 848                 return;
 849         }
 850         tevent_req_set_callback(subreq,
 851                                 tstream_cli_np_readv_trans_done,
 852                                 req);
 853 }
 854
 855 static void tstream_cli_np_readv_disconnect_now(struct tevent_req *req,
 856                                                 int error,
 857                                                 const char *location);
 858 static void tstream_cli_np_readv_trans_next(struct tevent_context *ctx,
 859                                             struct tevent_immediate *im,
 860                                             void *private_data);
 861
 862 static void tstream_cli_np_readv_trans_done(struct tevent_req *subreq)
 863 {
 864         struct tevent_req *req =
 865                 tevent_req_callback_data(subreq, struct tevent_req);
 866         struct tstream_cli_np_readv_state *state =
 867                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 868         struct tstream_cli_np *cli_nps =
 869                 tstream_context_data(state->stream, struct tstream_cli_np);
 870         uint8_t *rcvbuf;
 871         uint32_t received;
 872         NTSTATUS status;
 873
 874         if (cli_nps->is_smb1) {
 875                 status = cli_trans_recv(subreq, state, NULL, NULL, 0, NULL,
 876                                         NULL, 0, NULL,
 877                                         &rcvbuf, 0, &received);
 878         } else {
 879                 DATA_BLOB out_input_buffer = data_blob_null;
 880                 DATA_BLOB out_output_buffer = data_blob_null;
 881
 882                 status = smb2cli_ioctl_recv(subreq, state,
 883                                             &out_input_buffer,
 884                                             &out_output_buffer);
 885
 886                 /* Note that rcvbuf is not a talloc pointer here */
 887                 rcvbuf = out_output_buffer.data;
 888                 received = out_output_buffer.length;
 889         }
 890         TALLOC_FREE(subreq);
 891         if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 892                 status = NT_STATUS_OK;
 893         }
 894         if (!NT_STATUS_IS_OK(status)) {
 895                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 896                 return;
 897         }
 898
 899         if (received > TSTREAM_CLI_NP_MAX_BUF_SIZE) {
 900                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 901                 return;
 902         }
 903
 904         if (received == 0) {
 905                 tstream_cli_np_readv_disconnect_now(req, EPIPE, __location__);
 906                 return;
 907         }
 908
 909         cli_nps->read.ofs = 0;
 910         cli_nps->read.left = received;
 911         cli_nps->read.buf = talloc_array(cli_nps, uint8_t, received);
 912         if (cli_nps->read.buf == NULL) {
 913                 TALLOC_FREE(subreq);
 914                 tevent_req_nomem(cli_nps->read.buf, req);
 915                 return;
 916         }
 917         memcpy(cli_nps->read.buf, rcvbuf, received);
 918
 919         if (cli_nps->trans.write_req == NULL) {
 920                 tstream_cli_np_readv_read_next(req);
 921                 return;
 922         }
 923
 924         tevent_schedule_immediate(state->trans.im, state->ev,
 925                                   tstream_cli_np_readv_trans_next, req);
 926
 927         tevent_req_done(cli_nps->trans.write_req);
 928 }
 929
 930 static void tstream_cli_np_readv_trans_next(struct tevent_context *ctx,
 931                                             struct tevent_immediate *im,
 932                                             void *private_data)
 933 {
 934         struct tevent_req *req =
 935                 talloc_get_type_abort(private_data,
 936                 struct tevent_req);
 937
 938         tstream_cli_np_readv_read_next(req);
 939 }
 940
 941 static void tstream_cli_np_readv_read_done(struct tevent_req *subreq)
 942 {
 943         struct tevent_req *req =
 944                 tevent_req_callback_data(subreq, struct tevent_req);
 945         struct tstream_cli_np_readv_state *state =
 946                 tevent_req_data(req, struct tstream_cli_np_readv_state);
 947         struct tstream_cli_np *cli_nps =
 948                 tstream_context_data(state->stream, struct tstream_cli_np);
 949         uint8_t *rcvbuf;
 950         ssize_t received;
 951         NTSTATUS status;
 952
 953         /*
 954          * We must free subreq in this function as there is
 955          * a timer event attached to it.
 956          */
 957
 958         if (cli_nps->is_smb1) {
 959                 status = cli_read_andx_recv(subreq, &received, &rcvbuf);
 960         } else {
 961                 uint32_t data_length = 0;
 962                 status = smb2cli_read_recv(subreq, state, &rcvbuf, &data_length);
 963                 received = data_length;
 964         }
 965         /*
 966          * We can't TALLOC_FREE(subreq) as usual here, as rcvbuf still is a
 967          * child of that.
 968          */
 969         if (NT_STATUS_EQUAL(status, NT_STATUS_BUFFER_TOO_SMALL)) {
 970                 /*
 971                  * NT_STATUS_BUFFER_TOO_SMALL means that there's
 972                  * more data to read when the named pipe is used
 973                  * in message mode (which is the case here).
 974                  *
 975                  * But we hide this from the caller.
 976                  */
 977                 status = NT_STATUS_OK;
 978         }
 979         if (!NT_STATUS_IS_OK(status)) {
 980                 TALLOC_FREE(subreq);
 981                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 982                 return;
 983         }
 984
 985         if (received > TSTREAM_CLI_NP_MAX_BUF_SIZE) {
 986                 TALLOC_FREE(subreq);
 987                 tstream_cli_np_readv_disconnect_now(req, EIO, __location__);
 988                 return;
 989         }
 990
 991         if (received == 0) {
 992                 TALLOC_FREE(subreq);
 993                 tstream_cli_np_readv_disconnect_now(req, EPIPE, __location__);
 994                 return;
 995         }
 996
 997         cli_nps->read.ofs = 0;
 998         cli_nps->read.left = received;
 999         cli_nps->read.buf = talloc_array(cli_nps, uint8_t, received);
1000         if (cli_nps->read.buf == NULL) {
1001                 TALLOC_FREE(subreq);
1002                 tevent_req_nomem(cli_nps->read.buf, req);
1003                 return;
1004         }
1005         memcpy(cli_nps->read.buf, rcvbuf, received);
1006         TALLOC_FREE(subreq);
1007
1008         tstream_cli_np_readv_read_next(req);
1009 }
1010
1011 static void tstream_cli_np_readv_disconnect_done(struct tevent_req *subreq);
1012
1013 static void tstream_cli_np_readv_error(struct tevent_req *req);
1014
1015 static void tstream_cli_np_readv_disconnect_now(struct tevent_req *req,
1016                                                 int error,
1017                                                 const char *location)
1018 {
1019         struct tstream_cli_np_readv_state *state =
1020                 tevent_req_data(req,
1021                 struct tstream_cli_np_readv_state);
1022         struct tstream_cli_np *cli_nps =
1023                 tstream_context_data(state->stream,
1024                 struct tstream_cli_np);
1025         struct tevent_req *subreq;
1026
1027         state->error.val = error;
1028         state->error.location = location;
1029
1030         if (!cli_state_is_connected(cli_nps->cli)) {
1031                 /* return the original error */
1032                 tstream_cli_np_readv_error(req);
1033                 return;
1034         }
1035
1036         if (cli_nps->is_smb1) {
1037                 subreq = cli_close_send(state, state->ev, cli_nps->cli,
1038                                         cli_nps->fnum);
1039         } else {
1040                 subreq = smb2cli_close_send(state, state->ev,
1041                                             cli_nps->cli->conn,
1042                                             cli_nps->cli->timeout,
1043                                             cli_nps->cli->smb2.session,
1044                                             cli_nps->cli->smb2.tcon,
1045                                             0, /* flags */
1046                                             cli_nps->fid_persistent,
1047                                             cli_nps->fid_volatile);
1048         }
1049         if (subreq == NULL) {
1050                 /* return the original error */
1051                 tstream_cli_np_readv_error(req);
1052                 return;
1053         }
1054         tevent_req_set_callback(subreq,
1055                                 tstream_cli_np_readv_disconnect_done,
1056                                 req);
1057 }
1058
1059 static void tstream_cli_np_readv_disconnect_done(struct tevent_req *subreq)
1060 {
1061         struct tevent_req *req =
1062                 tevent_req_callback_data(subreq, struct tevent_req);
1063         struct tstream_cli_np_readv_state *state =
1064                 tevent_req_data(req, struct tstream_cli_np_readv_state);
1065         struct tstream_cli_np *cli_nps =
1066                 tstream_context_data(state->stream, struct tstream_cli_np);
1067
1068         if (cli_nps->is_smb1) {
1069                 cli_close_recv(subreq);
1070         } else {
1071                 smb2cli_close_recv(subreq);
1072         }
1073         TALLOC_FREE(subreq);
1074
1075         cli_nps->cli = NULL;
1076
1077         tstream_cli_np_readv_error(req);
1078 }
1079
1080 static void tstream_cli_np_readv_error_trigger(struct tevent_context *ctx,
1081                                                struct tevent_immediate *im,
1082                                                void *private_data);
1083
1084 static void tstream_cli_np_readv_error(struct tevent_req *req)
1085 {
1086         struct tstream_cli_np_readv_state *state =
1087                 tevent_req_data(req,
1088                 struct tstream_cli_np_readv_state);
1089         struct tstream_cli_np *cli_nps =
1090                 tstream_context_data(state->stream,
1091                 struct tstream_cli_np);
1092
1093         if (cli_nps->trans.write_req == NULL) {
1094                 /* return the original error */
1095                 _tevent_req_error(req, state->error.val, state->error.location);
1096                 return;
1097         }
1098
1099         if (state->trans.im == NULL) {
1100                 /* return the original error */
1101                 _tevent_req_error(req, state->error.val, state->error.location);
1102                 return;
1103         }
1104
1105         tevent_schedule_immediate(state->trans.im, state->ev,
1106                                   tstream_cli_np_readv_error_trigger, req);
1107
1108         /* return the original error for writev */
1109         _tevent_req_error(cli_nps->trans.write_req,
1110                           state->error.val, state->error.location);
1111 }
1112
1113 static void tstream_cli_np_readv_error_trigger(struct tevent_context *ctx,
1114                                                struct tevent_immediate *im,
1115                                                void *private_data)
1116 {
1117         struct tevent_req *req =
1118                 talloc_get_type_abort(private_data,
1119                 struct tevent_req);
1120         struct tstream_cli_np_readv_state *state =
1121                 tevent_req_data(req,
1122                 struct tstream_cli_np_readv_state);
1123
1124         /* return the original error */
1125         _tevent_req_error(req, state->error.val, state->error.location);
1126 }
1127
1128 static int tstream_cli_np_readv_recv(struct tevent_req *req,
1129                                    int *perrno)
1130 {
1131         struct tstream_cli_np_readv_state *state =
1132                 tevent_req_data(req, struct tstream_cli_np_readv_state);
1133         int ret;
1134
1135         ret = tsocket_simple_int_recv(req, perrno);
1136         if (ret == 0) {
1137                 ret = state->ret;
1138         }
1139
1140         tevent_req_received(req);
1141         return ret;
1142 }
1143
1144 struct tstream_cli_np_disconnect_state {
1145         struct tstream_context *stream;
1146 };
1147
1148 static void tstream_cli_np_disconnect_done(struct tevent_req *subreq);
1149
1150 static struct tevent_req *tstream_cli_np_disconnect_send(TALLOC_CTX *mem_ctx,
1151                                                 struct tevent_context *ev,
1152                                                 struct tstream_context *stream)
1153 {
1154         struct tstream_cli_np *cli_nps = tstream_context_data(stream,
1155                                          struct tstream_cli_np);
1156         struct tevent_req *req;
1157         struct tstream_cli_np_disconnect_state *state;
1158         struct tevent_req *subreq;
1159
1160         req = tevent_req_create(mem_ctx, &state,
1161                                 struct tstream_cli_np_disconnect_state);
1162         if (req == NULL) {
1163                 return NULL;
1164         }
1165
1166         state->stream = stream;
1167
1168         if (!cli_state_is_connected(cli_nps->cli)) {
1169                 tevent_req_error(req, ENOTCONN);
1170                 return tevent_req_post(req, ev);
1171         }
1172
1173         if (cli_nps->is_smb1) {
1174                 subreq = cli_close_send(state, ev, cli_nps->cli,
1175                                         cli_nps->fnum);
1176         } else {
1177                 subreq = smb2cli_close_send(state, ev, cli_nps->cli->conn,
1178                                             cli_nps->cli->timeout,
1179                                             cli_nps->cli->smb2.session,
1180                                             cli_nps->cli->smb2.tcon,
1181                                             0, /* flags */
1182                                             cli_nps->fid_persistent,
1183                                             cli_nps->fid_volatile);
1184         }
1185         if (tevent_req_nomem(subreq, req)) {
1186                 return tevent_req_post(req, ev);
1187         }
1188         tevent_req_set_callback(subreq, tstream_cli_np_disconnect_done, req);
1189
1190         return req;
1191 }
1192
1193 static void tstream_cli_np_disconnect_done(struct tevent_req *subreq)
1194 {
1195         struct tevent_req *req = tevent_req_callback_data(subreq,
1196                                                           struct tevent_req);
1197         struct tstream_cli_np_disconnect_state *state =
1198                 tevent_req_data(req, struct tstream_cli_np_disconnect_state);
1199         struct tstream_cli_np *cli_nps =
1200                 tstream_context_data(state->stream, struct tstream_cli_np);
1201         NTSTATUS status;
1202
1203         if (cli_nps->is_smb1) {
1204                 status = cli_close_recv(subreq);
1205         } else {
1206                 status = smb2cli_close_recv(subreq);
1207         }
1208         TALLOC_FREE(subreq);
1209         if (!NT_STATUS_IS_OK(status)) {
1210                 tevent_req_error(req, EIO);
1211                 return;
1212         }
1213
1214         cli_nps->cli = NULL;
1215
1216         tevent_req_done(req);
1217 }
1218
1219 static int tstream_cli_np_disconnect_recv(struct tevent_req *req,
1220                                           int *perrno)
1221 {
1222         int ret;
1223
1224         ret = tsocket_simple_int_recv(req, perrno);
1225
1226         tevent_req_received(req);
1227         return ret;
1228 }
1229
1230 static const struct tstream_context_ops tstream_cli_np_ops = {
1231         .name                   = "cli_np",
1232
1233         .pending_bytes          = tstream_cli_np_pending_bytes,
1234
1235         .readv_send             = tstream_cli_np_readv_send,
1236         .readv_recv             = tstream_cli_np_readv_recv,
1237
1238         .writev_send            = tstream_cli_np_writev_send,
1239         .writev_recv            = tstream_cli_np_writev_recv,
1240
1241         .disconnect_send        = tstream_cli_np_disconnect_send,
1242         .disconnect_recv        = tstream_cli_np_disconnect_recv,
1243 };